JB/T 5265-1991 Indirect resistance furnace RB series bell-type resistance furnace
Some standard content:
K61 | | tt | | JB | ex
1/4
1992-07-01
G20 xpne/
RB
1 theme content and scope of application
JB/T52651991
This standard specifies various requirements that RB series bell-type resistance furnace products (hereinafter referred to as bell-type furnaces) should meet, including variety specifications, technical performance, ordering and supply, etc.
This standard applies to designs in accordance with Articles 4.1, 5.1 and 52. It is mainly used for normalizing, annealing and other treatments of steel and cast iron in a natural atmosphere, and for processing steel or cast iron in a protective atmosphere. Bell-type resistance furnace for annealing coils and wire coils of base alloy. This standard also applies to similar bell-type resistance furnaces, and different parts may be specified. 2 Reference standards
GB 10067.1
GB10067.4
GB10066.1
GB10066.4
ZBK60001
3 Terminology||tt ||Basic Technical Conditions of Electric Heating Equipment Part 1 General Part Basic Technical Conditions of Electric Heating Equipment: Part 4 Test Methods for Electric Heating Equipment of Indirect Resistance Furnaces Part 1 Test Methods for Electric Heating Equipment of General Part Part 4 Method for Compiling Product Models of Electric Heating Equipment of Indirect Resistance Furnaces | |tt||Except for the following supplementary provisions, the rest shall be in accordance with Chapter 3 of GB100564. 3.1 The hearth
is located on the top of the green furnace base and is used to support the components of the charge. 3.2 The main control thermoelectric bias
is introduced from the bottom of the RBG bell-type furnace base and is located inside the furnace tank for controlling the temperature in the furnace tank. 3.3 Monitoring thermocouple
is introduced from the side wall of the RBG bell-type furnace hood and is located between the heating element and the furnace hoop for monitoring the temperature outside the furnace. 3.4 Working temperature
The normal operating temperature specified in the design of the oxygen furnace is a temperature range. For RBG type furnaces, it refers to the temperature inside the furnace marrow. 4 Product Classification
4.1 Varieties and Specifications
4.1.1 Bell-type furnaces are divided into multiple varieties according to structural form, gas construction and maximum operating temperature, as shown in Table 1. Other maximum operating temperature values ??are allowed in corporate product standards. At this time, the number in the variety code (the maximum operating temperature is divided by 100, and the decimal is rounded off) should be changed accordingly.
4.1.2 Various types of bell-type furnaces are divided into multiple specifications according to the size of the working area. Unless otherwise agreed between the supplier and the buyer, the size of the working area of ??the green furnace should comply with the following regulations. Minimum specification:
For a bell-type furnace with a rectangular work area, the length × width × height of the work area is 300mm × 300mm × 300mm, 1991-06-28
1992-07-01|| tt||1
JB/T 52651991
For bell-type furnaces with a cylindrical working area, the working area diameter × height is 300mm × 300mm. Other specifications:
Each size is in 100mm increments, and after reaching 600mm, it is in 200mm increments. The location of the working area in the furnace should be marked on the drawing attached to the product manual of the green furnace. Table 1
Variety code
RBT
RB
RB12
RBD7
RBD9
RBD12
RBG?
RBG
RBG9
Structure type
Furnace hood lifting type, no furnace tank, furnace gas
natural convection.
Lifting furnace base, no gingiva, furnace gas
natural convection.
The furnace hood is lifting type, with a furnace tank, and the furnace gas
strongly pursues convection.
gas building
natural
gas ammonia
protection
vapor atmosphere
maximum working overflow
750|| tt||950
1200
750
950
1200
750
850
950||tt| |4.1.3 Each bell-type furnace manufacturer can choose from the above varieties and specifications, and formulate their own product standards for bell-type furnaces. 4.2 Model
The model of the bell-type furnace should be compiled according to ZBK60001, and the technical level code is determined according to Article 7.4 of this standard. 4.3 Main parameters
In the enterprise product standards, the following items should be listed separately for each model of Cui-style furnace, a. Power supply voltage, V,
b, power frequency, Hz:
c, number of phases,
rated power, kW,
d.
e .
Number of temperature control zones:
f.
Heating element connection;
Working temperature,,
g.
h ,
i.
j.
k.
Working area size, mms
Maximum loading capacity, kg,
Heating capacity , kg/h,
Empty furnace heating time, h
Furnace temperature uniformity, ℃,
m.
n.
o.| |tt||p.
9.
2
Furnace temperature stability,
Empty furnace loss, kW,
Surface temperature rise, K,
Empty furnace energy consumption, kw·h
Applicable atmosphere and gas consumption, Nm/h (applicable to RBG bell-type furnace), maximum furnace weight, t, ||tt| |The maximum operating temperature of the bell furnace is 6.
c
750
>750～1000
>1000
5.2.3 furnace base
JB/T52651991||tt| |Table 3
Night-use period of preheated finished parts
Class A
6000
5000
3000
The furnace base consists of outer shell, Fire insulation layer, hearth and other parts of the assembly. 5.2.3.1 Shell
Class B
9000
7500
4500
The furnace base shell is welded with steel plate and section steel. There are sealing grooves around the shell for sealing of the furnace cover and furnace tank. Class C
12000
10000
6004
The shell should have sufficient strength and rigidity to withstand the furnace hood and the volume of the charge chamber, or for large furnaces, When the furnace hood is supported by ground support columns, it can bear the weight of the furnace charge.
5.2.3.2 Refractory insulation layer
The refractory insulation layer of the furnace base can be made of bricks or granular materials under the condition of sealing. The material and structure of the refractory insulation layer should be able to meet the performance requirements for bell furnaces (see Article 5.3). 5.2.3.3 Gas circulation system
The furnace seat of the RBG bell-type furnace should be equipped with a blast impeller and air guide plate that can withstand the temperature, load and atmosphere in the furnace for strong circulation of the protective atmosphere. The blower impeller is driven by an electric motor located at the bottom of the furnace base. The fan shaft should have good sealing and reliable cooling. When the fan stops for any reason, the heating power supply should be automatically cut off. The fan should be calibrated through dynamic balancing test. The noise of the fan should comply with the relevant national standards. 5.2.8.4 Hearth
The top surface of the furnace seat of the RBG bell-type furnace should be equipped with a hearth made of heat-resistant steel to support the charge and be composed of an air guide plate system to facilitate Channel for furnace gas circulation. For RB and RBD bell-type furnaces, when necessary, the hearth should be made into a bridge type, perforated plate type or other types to facilitate uniform load distribution and furnace gas circulation. For Class A, Class B and Class C furnaces, under normal use conditions, the hearth should not produce deformation that would hinder the use of the belt during the two, three and four-year service periods respectively.
5.2.3.5 Lifting device
RBD bell-type furnace should be equipped with a furnace base lifting device. Unless otherwise required (see Article 9.2), the lifting device may be driven by electricity or hydraulics. The design of the lifting device should ensure that the furnace base can be raised and lowered smoothly under the maximum loading capacity, and there should be safety measures to prevent it from being offside when it is in a high position, as well as necessary safety interlocking devices to ensure that the furnace is in a sealed position. The lifting device can also be designed to release the lowering structure after the furnace base is locked on the high channel.
5.2.3.6 Furnace Base Transportation Installation Photo
For BD type climbing furnaces, when there is a requirement, the furnace base can be designed into a structure that can be separated from the lifting device by agreement between the supplier and the buyer. a. For small and medium-sized bell-type furnaces, when the furnace base is at the lowest position, it becomes a wheeled trolley that can move on the track. When the furnace base is lowered to the track, it should be able to align itself and sit on the track. The number of trolleys, track length and arrangement should be as required; b. For large bell-type furnaces, the furnace base should be able to fall onto a ferry, which will transport it to a designated location for unloading. After reloading, it is transported back to the top of the lifting device by the cutting car. Usually one or several bell furnaces are equipped with a shuttle. The specific requirements of the demander can be submitted in accordance with Article 9.2. 5.2.4 Furnace tank
The furnace tank is made of suitable heat-resistant steel. Its design and manufacture should ensure that the thermal deformation is small and non-s at the working temperature within the specified service period. Furnace body dimensions, mm.
5 Technical Requirements
5.1 General Requirements
JB/T52651991
Ball-type furnaces shall comply with the provisions of Chapter 5 of GB10067.4. If there is any discrepancy between the provisions of this standard and this standard, this standard shall prevail. 5.2 Supplementary requirements for design and manufacturing
5.2.1 Overall design
The green furnace is mainly composed of furnace hood, furnace base, transmission mechanism, measurement control system and other parts. The furnace hood and working area of ??RB and RBD type furnaces are based on cylinders or cuboids. There is no furnace hood in the furnace hood, and there is no furnace gas forced circulation device on the furnace base. The furnace body of the RB type bell-type furnace is composed of a lifting hood and a fixed furnace base, while the RBD type bell-type furnace is composed of a furnace hood fixed on an elevated frame and a lifting furnace base. There should be sealing facilities between the furnace and the furnace base. The furnace body and working area of ??the RBG type bell furnace are made of cylinders. The furnace hood can be lifted and lowered, and the furnace base is fixed. There is a furnace escape in the furnace hood, which can pass into the required protective atmosphere (see Article 9.1). The furnace base is equipped with a blower impeller and air guide facilities for forced circulation of furnace gas. Vacuum sealing, sand sealing or oil sealing can be used between the furnace tank and the furnace base. There should also be sealing facilities between the furnace hood and the furnace base. The interior of the furnace can be purged and ventilated by an air extraction system, nitrogen flow, or as required by the purchaser (see Article 92). 5.2.2 Furnace hood
Furnace hood mainly consists of furnace shell, furnace village, heating elements, etc. 5221 Furnace Shell
The furnace shell is welded by steel plates and shaped steel, with the upper part closed and the lower part open. There should be lifting facilities on the furnace shell. The shape of the furnace shell is determined by the shape of the furnace working area (see Article 5.2.1). 5.2.2.2 Furnace lining
The material and structure of the furnace lining should be able to meet the performance requirements for bell furnaces (see Article 5.3). The furnace pairs of Class C green furnaces should all be made of refractory fiber except for the load-bearing and collision-prone parts. The overhaul period of the furnace village should comply with the requirements in Table 2.
Table 2
days
year
lining type
brick soul lining
full refractory fiber lining
5.2. 2.3 Heating element
A level
2
Repair
period
B level
6
3||tt ||Class c
4
The heating elements of the bell furnace should be made of electrothermal alloy. The material of the heating element should be selected correctly and its fixation should be firm to ensure that the heating element will not be displaced, fallen off or broken due to the movement of heating and furnace hood. The service life of the heating element is limited to the input power of the bell-type furnace being 15% less than its rated power at the rated power supply voltage, and should comply with the requirements in Table 3.
5.2.2.4 Furnace hood moving device or fixed frame
The lifting equipment of RB and RBG type bell furnaces can be lifted by the user's own lifting equipment. In order to facilitate one furnace hood to work alternately on several furnace bases, the furnace hood sometimes needs to move in a straight line or arc in the horizontal direction. When the purchaser requires the furnace hood lifting device or translation device, it can be submitted in accordance with Article 9.2, and the corresponding technical requirements should be proposed at the same time. To facilitate positioning, a furnace hood lifting guide device should be provided. RBD bell-type furnaces should be equipped with corresponding furnace hood fixing brackets.
There should be sufficient clearance distance between the furnace hood and the furnace base to facilitate the loading and unloading of furnace materials. 4
JB/T52651991
Auspicious. In order to expand the heat transfer area and reduce thermal stress, the furnace wall can adopt a corrugated structure when necessary. Under normal conditions of use, the service life of the furnace tank should be no less than one year. 52.5 Air extraction system
The air extraction system used for furnace cleaning and ventilation of RBG type furnaces should be equipped with valves and vacuum gauges, etc., and have automatic valves to automatically close in the event of a shutdown accident to prevent the vacuum pump from Oil enters the furnace. 5.2.6 Insulation cover
When there are regulations or requirements (see Article 9.2), the bell-type furnace should be equipped with an insulation cover for the insulation of the charge after heating. The insulation cover should have sufficient strength and rigidity and be easy to lift. Other technical requirements for thermal insulation covers should be supplemented in the enterprise product standards, or agreed upon by the supply and demand parties.
5.2.7 Cooling cover
When there are regulations or requirements (see Article 9.2), the bell-type furnace should be equipped with a cooling cover for rapid cooling of the charge after heating. The cooling tower is welded by steel plates and shaped steel. There are several air inlets pointing in the horizontal tangent direction of the outer wall of the furnace and corresponding axial flow fans at appropriate locations around it to blow outside cold air into the furnace. The top of the cooling cover is provided with a cooling water spray pipe. Air cooling and water cooling should be combined to reasonably control the cooling rate of the charge. The cooling cover should have sufficient strength and rigidity and be easy to lift. It is allowed to adopt other structural types specified in the enterprise product standards, or as required by the demander (see Article 9.2). 5,2.8 Measurement, control and recording
The measurement, control and recording of bell furnaces shall comply with GB10067.4 Article 5.2.7 and the following supplementary provisions. 5.2.8.1 Thermocouple
For RBG bell-type furnaces, thermocouples for temperature control should be equipped inside and outside the furnace relay. The thermocouple located inside the furnace tank is the master thermocouple and the thermocouple located outside the furnace tank is the monitoring thermocouple.
5.2.8.2 Temperature instrument
The control type of the temperature control instrument of the bell-type furnace should be a time proportional type that controls the contactor through an intermediate relay system, or other technically more advanced types.
C-class bell-type furnaces should be equipped with microprocessor digital display temperature control instruments with a temperature setting accuracy of not less than 0.5% and a resolution of not less than 1C. The digital height should be no less than 15mm. The meter should be equipped with an external socket to connect a recorder or printer. The effective width or diameter of the temperature recorder recording paper should not be less than 150mm. When a printer is required to replace the recorder, it may be requested in accordance with Article 9.2.
5.3 Performance update
The performance of the wing-type furnace should comply with GB10067.4 Article 5.3 and the following requirements. 5.3.1 Working temperature
For RB and RBD bell-type furnaces, if the maximum working temperature does not exceed 750°C, the working temperature is from 500 to the maximum working temperature. If the maximum working temperature exceeds 750°C, the working temperature is from 750℃ to maximum operating temperature. For RBG type accumulator furnaces, the operating temperature is from 300C to the maximum operating temperature. Within the operating temperature range, bell-type furnaces shall meet the requirements for furnace temperature uniformity and furnace temperature stability in Articles 5, 3.4 and 5.3.5. i.3.2 Maximum loading capacity
Unless otherwise required (see Article 9.2), the maximum loading capacity of the bell-type furnace based on the weight of steel materials shall be specified in the enterprise product standards in accordance with the requirements in Table 5. V in the table is the working area volume, m. However, for large rate furnaces, when determining the maximum loading capacity, the load-bearing capacity of the furnace base and hearth and the possibility of actual charging should be considered. The maximum loading capacity should be separately specified in the company's product standards and should be agreed upon by both parties. 1.3.8 Heating capacity
Unless otherwise required (see Article 92), the heating capacity of the rational furnace shall be specified in the enterprise product standards in accordance with the requirements in Table 6. The test temperature for assessing the thermal capacity plus 5
is the maximum operating temperature. Maximum operating temperature
℃
1000
>1000
Working area shape
cuboid
cylinder
Note: 1) S is the bottom area of ??the work area, m*, JB/T52651991
Table 5
Table 6
2) D is the diameter of the work area, m, H is the height of the work area, m. 5.3.4 Furnace temperature uniformity
The furnace temperature uniformity of the bell-type furnace should not exceed the following specified range: Class A furnace
Class B furnace
Class C furnace||tt ||5.8.5 Furnace temperature stability
+15℃
±10℃
±5℃
The furnace temperature stability of the bell furnace should not exceed the following specified range: A-level furnace
B-level furnace
C-level furnace
±10c
±4℃
± 1t
Maximum loading capacity| |tt||kg
3000×V
2500xV
plus
force
350×sl)
350×D×H2 ) | The surface temperature rise of the operating handle or handwheel should not exceed 25K. Table
Maximum operating temperature 9
c
750
>759~1030
>1000
Part
7
position
The outer surfaces of the furnace hood and furnace base do not include parts near the sealing groove that are not easily accessible to the human body.
Surface temperature rise
K
40
50
60
5.3.7 Empty furnace heating time
except Unless otherwise required (see Article 9.2), the empty furnace heating time of a bell-type furnace with a working area volume not greater than 2 m shall comply with the requirements in Table 8. When the volume of the working area is greater than 2m*, the time for the empty furnace to rise and overflow should be separately stipulated in the company's product standards, or agreed between the supplier and the buyer. 5.8.8 Empty furnace loss
The empty furnace loss of oxygen furnace should comply with the regulations of enterprise product standards. 5.3.9 Empty furnace energy consumption
The empty furnace energy consumption of the bell-type furnace should comply with the regulations of the enterprise's product standards. 6
Class shave
RF
RFD
RFG
Working area volume V
m*
03|| tt||>0.3~2,0
0.3
>0.3~2.0
5.8,10 Empty furnace pumping time and pressure rise rate
JB/T52651991| |tt||Table 8
Air protection heating time
A level
2.5
3.0
3.5
B level||tt ||1.5
2.0
2.5
C-level
0.8
1.0
1.5
For equipment equipped with furnace cleaning replacement For RBG bell-type furnaces with gas extraction systems, the empty furnace extraction time (from atmospheric pressure to 100Pa) should not be greater than 20 minutes, and the pressure rise rate should not be greater than 1Pa/min. 5.3.11 Other
Other performance aspects of the bell-type furnace shall comply with Article 5.2 of this standard, as well as the corresponding provisions in the enterprise's product standards and supply contracts. 6.4 Rubber sleeve requirements
5.4.1 The complete supply range of bell-type furnaces specified by the supplier should be listed in the enterprise product standards, which mainly includes the following items: a.
Bell-type furnace body ( Including one furnace hood, two furnace bases, and two furnace tanks for RBG furnaces), and multiple control cabinets
b.
c.
Temperature instrument||tt| |d.
Thermocouple:
Compensation wire:
e.
f.
9.
h.||tt || Furnace base lifting device (applicable to RBD bell-type furnaces), furnace hood fixing frame (applicable to RBD bell-type furnaces): Spare parts:
"Product Manual", including necessary drawings. Necessary supplements to the above items can be made in the enterprise product standards, and the specific content of each item should be listed, including model, specification and quantity.
If the demander has different requirements for the items specified by the supplier, he may submit them in accordance with Article 9, 2. 5.4.2 When the following accessories or covers are required, they can be submitted in accordance with Article 9.2. Necessary technical requirements are agreed upon by both parties. Electric energy meters and (or) other meters
a,
b.
Program controller,
materials and (or) material racks,
c
d
charging device,
..
protective gas generating device and/or its accessories. 6 Test methods
The test of the accumulator furnace shall be carried out in accordance with the corresponding provisions of GB10066.1 and GB10066.4 and the following supplementary requirements. For RBG bell-type furnaces, the furnace tank shall be located inside the furnace during the test. The furnace temperature should be based on the temperature measured by the main control thermocouple located in the furnace tank.
6.1 Measurement of furnace temperature uniformity and furnace temperature stability. The test temperatures are the minimum and maximum operating temperatures of the bell-type furnace respectively. The test was conducted under natural atmosphere conditions.
A
JB/T52651991
For multi-temperature control zone bell-type furnaces, the set temperatures in each zone should be the same, and the arithmetic mean of the temperatures measured at the temperature control points in each zone should be used Used as a baseline value to determine furnace temperature uniformity.
6,2 Measurement of surface overflow
The measuring point should be at any point on the outer surface of the furnace hood, furnace base, operating handle, etc., but the area near the sealing groove is not easily accessible to the human body. Exceptions are 75mm from the edges of heating element and thermocouple exit holes and 75mm from the center of furnace penetration fasteners. 6.3 Heating capacity test
The heating capacity of the bell-type furnace is determined according to the "indirect method" of GB10066.4 Article 6.17 item b. When the following formula is established, the bell-type furnace is considered to have sufficient heating capacity:
t, (P,-P.)≥G.AH
where: P. One-hood type Measured value of furnace rated power, kW; P. The actual measured value of the empty furnace loss of the bell-type furnace, kW, t
The time for calculating the thermal capacity is set as 1 hour;
The heating capacity value specified in the enterprise product standard or agreed upon by both the supplier and the buyer, kg; △H - When the charge is heated from the initial temperature (taken as the reference ambient temperature of 20C) to the maximum operating temperature of the bell furnace, the thermal baking increase plate, kW.h/kg.
8.4 Loading operation test
Unless otherwise arranged by the manufacturer, the loading operation test shall be conducted at the user's site. The material, shape, size and placement method of the furnace charge shall be agreed upon by both parties. The furnace charge is provided by the user.
Load a batch of charge with a weight equal to the maximum loading capacity into the furnace, and run at least one heating, heat preservation, and cooling cycle at the maximum operating temperature. Then stop the furnace and conduct inspection according to GB10066.1 Article 7, 2.8. 7 Inspection rules and grading
The inspection and grading of bell-type furnaces shall be carried out in accordance with GB10067, 1 Chapter 7 and the following articles. 7.1 The factory inspection items of bell-type furnaces should include the following items. a, general inspection;
b. Safety inspection cover,
c.
Durability test of sign writing
Inspection of furnace size and working area size, d.
Inspection of furnace marrow size and manufacturing quality (Applicable to RBG bell-type furnaces) e
f.
Inspection of furnace lining quality
9. Inspection of manufacturing quality of heating element fibers,
h.|| tt||Measurement of cold DC resistance of metal heating elements, inspection of the short circuit of the heating element to the furnace shell, measurement of
F
insulation resistance (applicable to bell-type furnaces with ovens before leaving the factory): k.
t.
Insulation withstand voltage test (applicable to bell-type furnaces before leaving the factory): calibration of temperature instruments,
m.
movement Cold state inspection of mechanism operation or action, inspection of interlock alarm system!
n.
Inspection of water, gas, hydraulic and pumping systems (when these systems are present) o
P.
Inspection sets of supporting parts , including inspection of model, specification, export certificate, q
supply scope, including inspection of integrity of factory technical documents, f, packaging particle inspection.
8
6 Surface overflow
When the bell-type furnace is in a thermally stable state at the highest operating temperature, the surface temperature rise of the furnace hood and furnace base should comply with the requirements in Table 7. The surface temperature rise of the operating handle or handwheel should not exceed 25K. Table
Maximum operating temperature 9
c
750
>759~1030
>1000
Part
7
position
The outer surfaces of the furnace hood and furnace base do not include parts near the sealing groove that are not easily accessible to the human body.
Surface temperature rise
K
40
50
60
5.3.7 Empty furnace heating time
except Unless otherwise required (see Article 9.2), the empty furnace heating time of a bell-type furnace with a working area volume not greater than 2 m shall comply with the requirements in Table 8. When the volume of the working area is greater than 2m*, the time for the empty furnace to rise and overflow should be separately stipulated in the company's product standards, or agreed between the supplier and the buyer. 5.8.8 Empty furnace loss
The empty furnace loss of oxygen furnace should comply with the regulations of enterprise product standards. 5.3.9 Empty furnace energy consumption
The empty furnace energy consumption of the bell-type furnace should comply with the regulations of the enterprise's product standards. 6
Class shave
RF
RFD
RFG
Working area volume V
m*
03|| tt||>0.3~2,0
0.3
>0.3~2.0
5.8,10 Empty furnace pumping time and pressure rise rate
JB/T52651991| |tt||Table 8
Air protection heating time
A level
2.5
3.0
3.5
B level||tt ||1.5
2.0
2.5
C-level
0.8
1.0
1.5
For equipment equipped with furnace cleaning replacement For RBG bell-type furnaces with gas extraction systems, the empty furnace extraction time (from atmospheric pressure to 100Pa) should not be greater than 20 minutes, and the pressure rise rate should not be greater than 1Pa/min. 5.3.11 Other
Other performance aspects of the bell-type furnace shall comply with Article 5.2 of this standard, as well as the corresponding provisions in the enterprise's product standards and supply contracts. 6.4 Rubber sleeve requirements
5.4.1 The complete supply range of bell-type furnaces specified by the supplier should be listed in the enterprise product standards, which mainly includes the following items: a.
Bell-type furnace body ( Including one furnace hood, two furnace bases, and two furnace tanks for RBG furnaces), and multiple control cabinets
b.
c.
Temperature instrument||tt| |d.www.bzxz.net
Thermocouple:
Compensation wire:
e.
f.
9.
h.||tt || Furnace base lifting device (applicable to RBD bell-type furnaces), furnace hood fixing frame (applicable to RBD bell-type furnaces): Spare parts:
"Product Manual", including necessary drawings. Necessary supplements to the above items can be made in the enterprise product standards, and the specific content of each item should be listed, including model, specification and quantity.
If the demander has different requirements for the items specified by the supplier, he may submit them in accordance with Article 9, 2. 5.4.2 When the following accessories or covers are required, they can be submitted in accordance with Article 9.2. Necessary technical requirements are agreed upon by both parties. Electric energy meters and (or) other meters
a,
b.
Program controller,
materials and (or) material racks,
c
d
charging device,
..
protective gas generating device and/or its accessories. 6 Test methods
The test of the accumulator furnace shall be carried out in accordance with the corresponding provisions of GB10066.1 and GB10066.4 and the following supplementary requirements. For RBG bell-type furnaces, the furnace tank shall be located inside the furnace during the test. The furnace temperature should be based on the temperature measured by the main control thermocouple located in the furnace tank.
6.1 Measurement of furnace temperature uniformity and furnace temperature stability. The test temperatures are the minimum and maximum operating temperatures of the bell-type furnace respectively. The test was conducted under natural atmosphere conditions.
A
JB/T52651991
For bell-type furnaces with multiple temperature control zones, the set temperatures in each zone should be the same, and the arithmetic mean of the temperatures measured at the temperature control points in each zone should be used Used as a baseline value to determine furnace temperature uniformity.
6,2 Measurement of surface overflow
The measuring point should be at any point on the outer surface of the furnace hood, furnace base, operating handle, etc., but the area near the sealing groove is not easily accessible to the human body. Exceptions are 75mm from the edges of heating element and thermocouple exit holes and 75mm from the center of furnace penetration fasteners. 6.3 Heating capacity test
The heating capacity of the bell-type furnace is determined according to the "indirect method" of GB10066.4 Article 6.17 item b. When the following formula is established, the bell-type furnace is considered to have sufficient heating capacity:
t, (P,-P.)≥G.AH
where: P. One-hood type Measured value of furnace rated power, kW; P. The actual measured value of the empty furnace loss of the bell-type furnace, kW, t
The time for calculating the thermal capacity is set as 1 hour;
The heating capacity value specified in the enterprise product standard or agreed upon by both the supplier and the buyer, kg; △H - When the charge is heated from the initial temperature (taken as the reference ambient temperature of 20C) to the maximum operating temperature of the bell furnace, the thermal baking increase plate, kW.h/kg.
8.4 Loading operation test
Unless otherwise arranged by the manufacturer, the loading operation test shall be conducted at the user's site. The material, shape, size and placement method of the furnace charge shall be agreed upon by both parties. The furnace charge is provided by the user.
Load a batch of charge with a weight equal to the maximum loading capacity into the furnace, and run at least one heating, heat preservation, and cooling cycle at the maximum operating temperature. Then stop the furnace and conduct inspection according to GB10066.1 Article 7, 2.8. 7 Inspection rules and grading
The inspection and grading of bell-type furnaces shall be carried out in accordance with GB10067, 1 Chapter 7 and the following articles. 7.1 The factory inspection items of bell-type furnaces should include the following items. a, general inspection;
b. Safety inspection cover,
c.
Durability test of sign writing
Inspection of furnace size and working area size, d.
Inspection of furnace marrow size and manufacturing quality (Applicable to RBG bell-type furnaces) e
f.
Inspection of furnace lining quality
9. Inspection of manufacturing quality of heating element fibers,
h.|| tt||Measurement of cold DC resistance of metal heating elements, inspection of the short circuit of the heating element to the furnace shell, measurement of
F
insulation resistance (applicable to bell-type furnaces with ovens before leaving the factory): k.
t.
Insulation withstand voltage test (applicable to bell-type furnaces before leaving the factory): calibration of temperature instruments,
m.
movement Cold state inspection of mechanism operation or action, inspection of interlock alarm system!
n.
Inspection of water, gas, hydraulic and pumping systems (when these systems are present) o
P.
Inspection sets of supporting parts , including inspection of models, specifications, export certificates, q
supply scope, including inspection of integrity of factory technical documents, f, packaging particle inspection.
8
6 Surface overflow
When the bell-type furnace is in a thermally stable state at the highest operating temperature, the surface temperature rise of the furnace hood and furnace base should comply with the requirements in Table 7. The surface temperature rise of the operating handle or handwheel should not exceed 25K. Table
Maximum operating temperature 9
c
750
>759~1030
>1000
Part
7
position
The outer surfaces of the furnace hood and furnace base do not include parts near the sealing groove that are not easily accessible to the human body.
Surface temperature rise
K
40
50
60
5.3.7 Empty furnace heating time
except Unless otherwise required (see Article 9.2), the empty furnace heating time of a bell-type furnace with a working area volume not greater than 2 m shall comply with the requirements in Table 8. When the working area volume is greater than 2m*, the empty furnace overflow time should be separately stipulated in the company's product standards, or agreed upon by both supply and demand parties. 5.8.8 Empty furnace loss
The empty furnace loss of oxygen furnace should comply with the regulations of enterprise product standards. 5.3.9 Empty furnace energy consumption
The empty furnace energy consumption of the bell-type furnace should comply with the regulations of the enterprise's product standards. 6
Class shave
RF
RFD
RFG
Working area volume V
m*
03|| tt||>0.3~2,0
0.3
>0.3~2.0
5.8,10 Empty furnace pumping time and pressure rise rate
JB/T52651991| |tt||Table 8
Air protection heating time
A level
2.5
3.0
3.5
B level||tt ||1.5
2.0
2.5
C-level
0.8
1.0
1.5
For equipment equipped with furnace cleaning replacement For RBG bell-type furnaces with gas extraction systems, the empty furnace extraction time (from atmospheric pressure to 100Pa) should not be greater than 20 minutes, and the pressure rise rate should not be greater than 1Pa/min. 5.3.11 Other
Other performance aspects of the bell-type furnace shall comply with Article 5.2 of this standard, as well as the corresponding provisions in the enterprise's product standards and supply contracts. 6.4 Rubber sleeve requirements
5.4.1 The complete supply range of bell-type furnaces specified by the supplier should be listed in the enterprise product standards, which mainly includes the following items: a.
Bell-type furnace body ( Including one furnace hood, two furnace bases, and two furnace tanks for RBG furnaces), and multiple control cabinets
b.
c.
Temperature instrument||tt| |d.
Thermocouple:
Compensation wire:
e.
f.
9.
h.||tt || Furnace base lifting device (applicable to RBD bell-type furnaces), furnace hood fixing frame (applicable to RBD bell-type furnaces): Spare parts:
"Product Manual", including necessary drawings. Necessary supplements to the above items can be made in the enterprise product standards, and the specific content of each item should be listed, including model, specification and quantity.
If the demander has different requirements for the items specified by the supplier, he may submit them in accordance with Article 9, 2. 5.4.2 When the following accessories or covers are required, they can be submitted in accordance with Article 9.2. Necessary technical requirements are agreed upon by both parties. Electric energy meters and (or) other meters
a,
b.
Program controller,
materials and (or) material racks,
c
d
charging device,
..
protective gas generating device and/or its accessories. 6 Test methods
The test of the accumulator furnace shall be carried out in accordance with the corresponding provisions of GB10066.1 and GB10066.4 and the following supplementary requirements. For RBG bell-type furnaces, the furnace tank shall be located inside the furnace during the test. The furnace temperature should be based on the temperature measured by the main control thermocouple located in the furnace tank.
6.1 Measurement of furnace temperature uniformity and furnace temperature stability. The test temperatures are the minimum and maximum operating temperatures of the bell-type furnace respectively. The test was conducted under natural atmosphere conditions.
A
JB/T52651991
For bell-type furnaces with multiple temperature control zones, the set temperatures in each zone should be the same, and the arithmetic mean of the temperatures measured at the temperature control points in each zone should be used Used as a baseline value to determine furnace temperature uniformity.
6,2 Measurement of surface overflow
The measuring point should be at any point on the outer surface of the furnace hood, furnace base, operating handle, etc., but the area near the sealing groove is not easily accessible to the human body. Exceptions are 75mm from the edges of heating element and thermocouple exit holes and 75mm from the center of furnace penetration fasteners. 6.3 Heating capacity test
The heating capacity of the bell-type furnace is determined according to the "indirect method" of GB10066.4 Article 6.17 item b. When the following formula is established, the bell-type furnace is considered to have sufficient heating capacity:
t, (P,-P.)≥G.AH
where: P. One-hood type Measured value of furnace rated power, kW; P. The actual measured value of the empty furnace loss of the bell-type furnace, kW, t
The time for calculating the thermal capacity is set as 1 hour;
The heating capacity value specified in the enterprise product standard or agreed upon by both the supplier and the buyer, kg; △H - When the charge is heated from the initial temperature (taken as the reference ambient temperature of 20C) to the maximum operating temperature of the bell furnace, the thermal baking increase plate, kW.h/kg.
8.4 Loading operation test
Unless otherwise arranged by the manufacturer, the loading operation test shall be carried out at the user's site. The material, shape, size and placement method of the furnace charge shall be agreed upon by both parties. The furnace charge is provided by the user.
Load a batch of charge with a weight equal to the maximum loading capacity into the furnace, and run at least one heating, insulation, and cooling cycle at the maximum operating temperature. Then stop the furnace and conduct inspection according to GB10066.1 Article 7, 2.8. 7 Inspection rules and grading
The inspection and grading of bell-type furnaces shall be carried out in accordance with GB10067, 1 Chapter 7 and the following articles. 7.1 The factory inspection items of bell-type furnaces should include the following items. a, general inspection;
b. Safety inspection cover,
c.
Signage durability test
Inspection of furnace size and working area size, d.
Inspection of furnace marrow size and manufacturing quality (Applicable to RBG bell-type furnaces) e
f.
Inspection of furnace lining quality
9. Inspection of manufacturing quality of heating element fibers,
h.|| tt||Measurement of cold DC resistance of metal heating elements, inspection of the short circuit of the heating element to the furnace shell, measurement of
F
insulation resistance (applicable to bell-type furnaces with ovens before leaving the factory): k.
t.
Insulation withstand voltage test (applicable to bell-type furnaces before leaving the factory): calibration of temperature instruments,
m.
movement Cold state inspection of mechanism operation or action, inspection of interlock alarm system!
n.
Inspection of water, gas, hydraulic and pumping systems (when these systems are present) o
P.
Inspection sets of supporting parts , including inspection of model, specification, export certificate, q
supply scope, including inspection of integrity of factory technical documents, f, packaging particle inspection.
8
5
Class C
0.8
1.0
1.5
For RBG bell-type furnaces equipped with an exhaust system for furnace cleaning and ventilation, the air The furnace pumping time (from atmospheric pressure to 100Pa) should not be greater than 20 minutes, and the pressure rise rate should not be greater than 1Pa/min. 5.3.11 Other
Other performance aspects of the bell-type furnace shall comply with Article 5.2 of this standard, as well as the corresponding provisions in the enterprise's product standards and supply contracts. 6.4 Rubber sleeve requirements
5.4.1 The complete supply range of bell-type furnaces specified by the supplier should be listed in the enterprise product standards, which mainly includes the following items: a.
Bell-type furnace body ( Including one furnace hood, two furnace bases, and two furnace tanks for RBG furnaces), and multiple control cabinets
b.
c.
Temperature instrument||tt| |d.
Thermocouple:
Compensation wire:
e.
f.
9.
h.||tt || Furnace base lifting device (applicable to RBD bell-type furnaces), furnace hood fixing frame (applicable to RBD bell-type furnaces): Spare parts:
"Product Manual", including necessary drawings. Necessary supplements to the above items can be made in the enterprise product standards, and the specific content of each item should be listed, including model, specification and quantity.
If the demander has different requirements for the items specified by the supplier, he may submit them in accordance with Article 9, 2. 5.4.2 When the following accessories or covers are required, they can be submitted in accordance with Article 9.2. Necessary technical requirements are agreed upon by both parties. Electric energy meters and (or) other meters
a,
b.
Program controller,
materials and (or) material racks,
c
d
charging device,
..
protective gas generating device and/or its accessories. 6 Test methods
The test of the accumulator furnace shall be carried out in accordance with the corresponding provisions of GB10066.1 and GB10066.4 and the following supplementary requirements. For RBG bell-type furnaces, the furnace tank shall be located inside the furnace during the test. The furnace temperature should be based on the temperature measured by the main control thermocouple located in the furnace tank.
6.1 Measurement of furnace temperature uniformity and furnace temperature stability. The test temperatures are the minimum and maximum operating temperatures of the bell-type furnace respectively. The test was conducted under natural atmosphere conditions.
A
JB/T52651991
For bell-type furnaces with multiple temperature control zones, the set temperatures in each zone should be the same, and the arithmetic mean of the temperatures measured at the temperature control points in each zone should be used Used as a baseline value to determine furnace temperature uniformity.
6,2 Measurement of surface overflow
The measuring point should be at any point on the outer surface of the furnace hood, furnace base, operating handle, etc., but the area near the sealing groove is not easily accessible to the human body. Exceptions are 75mm from the edges of heating element and thermocouple exit holes and 75mm from the center of furnace penetration fasteners. 6.3 Heating capacity test
The heating capacity of the bell-type furnace is determined according to the "indirect method" of GB10066.4 Article 6.17 item b. When the following formula is established, the bell-type furnace is considered to have sufficient heating capacity:
t, (P,-P.)≥G.AH
where: P. One-hood type Measured value of furnace rated power, kW; P. The actual measured value of the empty furnace loss of the bell-type furnace, kW, t
The time for calculating the thermal capacity is set as 1 hour;
The heating capacity value specified in the enterprise product standard or agreed upon by both the supply and demand parties, kg; △H - When the charge is heated from the initial temperature (taken as the reference ambient temperature of 20C) to the maximum operating temperature of the bell furnace, the thermal baking increase plate, kW.h/kg.
8.4 Loading operation test
Unless otherwise arranged by the manufacturer, the loading operation test shall be carried out at the user's site. The material, shape, size and placement method of the furnace charge shall be agreed upon by both parties. The furnace charge is provided by the user.
Load a batch of charge with a weight equal to the maximum loading capacity into the furnace, and run at least one heating, insulation, and cooling cycle at the maximum operating temperature. Then stop the furnace and conduct inspection according to GB10066.1 Article 7, 2.8. 7 Inspection rules and grading
The inspection and grading of bell-type furnaces shall be carried out in accordance with GB10067, 1 Chapter 7 and the following articles. 7.1 The factory inspection items of bell-type furnaces should include the following items. a, general inspection;
b. Safety inspection cover,
c.
Signage durability test
Inspection of furnace size and working area size, d.
Inspection of furnace marrow size and manufacturing quality (Applicable to RBG bell-type furnaces) e
f.
Inspection of furnace lining quality
9. Inspection of manufacturing quality of heating element fibers,
h.|| tt||Measurement of cold DC resistance of metal heating elements, inspection of short circuit of heating elements to furnace shell, measurement of insulation resistance of
F
(applicable to bell-type furnaces with ovens before leaving the factory): k.
t.
Insulation withstand voltage test (applicable to bell-type furnaces before leaving the factory): calibration of temperature instruments,
m.
movement Cold state inspection of mechanism operation or action, inspection of interlock alarm system!
n.
Inspection of water, gas, hydraulic and pumping systems (when these systems are present) o
P.
Inspection sets of supporting parts , including inspection of model, specification, export certificate, q
supply scope, including inspection of integrity of factory technical documents, f, packaging particle inspection.
8
5
C-level
0.8
1.0
1.5
For RBG bell-type furnaces equipped with an exhaust system for cleaning and ventilation, the empty furnace exhaust time (from atmospheric pressure to 100Pa) should not exceed 20min, and the pressure rise rate should not exceed 1Pa/min. 5.3.11 Others
The other performances of bell-type furnaces should comply with Article 5.2 of this standard, as well as the corresponding provisions in the enterprise product standards and supply contracts. 6.4 Rubber sleeve requirements
5.4.1 The complete set supply scope of bell-type furnace specified by the supplier shall be listed in the enterprise product standards, mainly including the following items: a.
Ball-type furnace body (including one furnace hood, two furnace bases, and two furnace tanks for RBG type furnaces), multiple control cabinets
b.
c.
Temperature instrument
d.
Thermocouple:
Compensation wire:
e.
f.
9.
h.
Furnace base lifting device (applicable to RBD type bell-type furnace), furnace hood fixing frame (applicable to RBD type bell-type furnace): spare parts:
Product manual, including necessary drawings. The above items can be supplemented in the enterprise product standards, and the specific content of each item, including model, specification and quantity, shall be listed.
If the purchaser has different requirements for the items specified by the supplier, it can be proposed in accordance with Article 9.2. 5.4.2 When the following accessories or covers are required, they can be proposed in accordance with Article 9.2. The necessary technical requirements shall be agreed upon by the supply and demand parties. Electric energy meter and (or) other meters
a,
b.
Program controller,
Material and (or) material rack,
c
d
Charging device,
..
Protective gas generator and (or) its accessories. 6 Test method
The test of the accumulative furnace shall be carried out in accordance with the corresponding provisions of GB10066.1 and GB10066.4 and the following supplementary requirements. For RBG bell-type furnaces, the furnace tank shall be located in the furnace during the test. The furnace temperature shall be based on the temperature measured by the main control thermocouple located in the furnace tank.
6.1 Measurement of furnace temperature uniformity and furnace temperature stability The test temperatures are the lowest and highest operating temperatures of the bell-type furnace respectively. The test is carried out under natural atmosphere conditions.
A
JB/T52651991
For bell-type furnaces with multiple temperature control zones, the set temperatures of each zone should be the same, and the arithmetic mean of the temperatures measured at the temperature control points of each zone should be used as the reference value to determine the furnace temperature uniformity.
6,2 Measurement of surface rise
The measurement point should be at any point on the outer surface of the furnace hood, furnace base, operating handle, etc., except for the parts near the sealing groove that are not easily touched by the human body, 75mm from the edge of the heating element and the thermocouple lead-out hole, and 75mm from the center of the furnace penetration fastener. 6.3 Heating capacity test
The heating capacity of the bell-type furnace is determined according to the "indirect method" in Article 6.17b of GB10066.4. When the following formula is established, the bell-type furnace is considered to have sufficient heating capacity:
t, (P,-P.) ≥ G.AH
Where: P. is the measured value of the bell-type furnace rated power, kW; P. is the measured value of the bell-type furnace empty furnace loss, kW, t
The time for calculating the thermal capacity is set as 1h;
G is the heating capacity value specified in the enterprise product standard or agreed upon by the supply and demand parties, kg; △H is the increase in heat when the charge is heated from the initial temperature (the reference ambient temperature is 20C) to the maximum operating temperature of the bell-type furnace, kW.h/kg.
8.4 Loading and running test
Unless otherwise arranged by the manufacturer, the loading and running test shall be carried out at the user's site. The material, shape, size and placement method of the charge shall be agreed upon by both parties. The charge shall be provided by the user.
Put a batch of charge equal to the maximum loading into the furnace and run at least one heating, insulation and cooling cycle at the highest operating temperature. Then stop the furnace and inspect it according to Article 7, 2.8 of GB10066.1. 7 Inspection rules and classification
The inspection and classification of bell-type furnaces shall be carried out in accordance with Chapter 7 and the following articles of GB10067.1. 7.1 The factory inspection items of bell-type furnaces shall include the following items. a, general inspection;
b. Safety inspection,
c.
Durability test of signage
Detection of furnace size and working area size, d.
Inspection of furnace marrow size and manufacturing quality (applicable to RBG bell-type furnaces)e
f.
Inspection of furnace lining quality
9. Inspection of heating element fiber manufacturing quality,
h.
Measurement of cold DC resistance of metal heating elements, inspection of short circuit of heating elements to furnace shell,
F
Measurement of insulation resistance (applicable to bell-type furnaces for drying before leaving the factory): k.
t.
Insulation withstand voltage test (applicable to bell-type furnaces for drying before leaving the factory): calibration of temperature instruments,
m.
Cold inspection of the operation or action of the motion mechanism, inspection of the interlocking alarm system!
n.
Inspection of water, gas, hydraulic and exhaust systems (when these systems are available) o
P.
Inspection of accessories, including model, specification, and inspection of export certificates, q
Supply scope, including inspection of the integrity of factory technical documents, f. Inspection of packaging.
8
Actual measured value of rated power of a bell-type furnace, kW; P. The actual measured value of the empty furnace loss of the bell-type furnace, kW, t
The time for calculating the thermal capacity is set as 1 hour;
The heating capacity value specified in the enterprise product standard or agreed upon by both the supplier and the buyer, kg; △H - When the charge is heated from the initial temperature (taken as the reference ambient temperature of 20C) to the maximum operating temperature of the bell furnace, the thermal baking increase plate, kW.h/kg.
8.4 Loading operation test
Unless otherwise arranged by the manufacturer, the loading operation test shall be carried out at the user's site. The material, shape, size and placement method of the furnace charge shall be agreed upon by both parties. The furnace charge is provided by the user.
Load a batch of charge with a weight equal to the maximum loading capacity into the furnace, and run at least one heating, insulation, and cooling cycle at the maximum operating temperature. Then stop the furnace and conduct inspection according to GB10066.1 Article 7, 2.8. 7 Inspection rules and grading
The inspection and grading of bell-type furnaces shall be carried out in accordance with GB10067, 1 Chapter 7 and the following articles. 7.1 The factory inspection items of bell-type furnaces should include the following items. a, general inspection;
b. Safety inspection cover,
c.
Signage durability test
Inspection of furnace size and working area size, d.
Inspection of furnace marrow size and manufacturing quality (Applicable to RBG bell-type furnaces) e
f.
Inspection of furnace lining quality
9. Inspection of manufacturing quality of heating element fibers,
h.|| tt||Measurement of cold DC resistance of metal heating elements, inspection of short circuit of heating elements to furnace shell, measurement of insulation resistance of
F
(applicable to bell-type furnaces with ovens before leaving the factory): k.
t.
Insulation withstand voltage test (applicable to bell-type furnaces before leaving the factory): calibration of temperature instruments,
m.
movement Cold state inspection of mechanism operation or action, inspection of interlock alarm system!
n.
Inspection of water, gas, hydraulic and pumping systems (when these systems are present) o
P.
Inspection sets of supporting parts , including inspection of model, specification, export certificate, q
supply scope, including inspection of integrity of factory technical documents, f, packaging particle inspection.
8
Actual measured value of rated power of a bell-type furnace, kW; P. The actual measured value of the empty furnace loss of the bell-type furnace, kW, t
The time for calculating the thermal capacity is set as 1 hour;
The heating capacity value specified in the enterprise product standard or agreed upon by both the supplier and the buyer, kg; △H - When the charge is heated from the initial temperature (taken as the reference ambient temperature of 20C) to the maximum operating temperature of the bell furnace, the thermal baking increase plate, kW.h/kg.
8.4 Loading operation test
Unless otherwise arranged by the manufacturer, the loading operation test shall be carried out at the user's site. The material, shape, size and placement method of the furnace charge shall be agreed upon by both parties. The furnace charge is provided by the user.
Load a batch of charge with a weight equal to the maximum loading capacity into the furnace, and run at least one heating, insulation, and cooling cycle at the maximum operating temperature. Then stop the furnace and conduct inspection according to GB10066.1 Article 7, 2.8. 7 Inspection rules and grading
The inspection and grading of bell-type furnaces shall be carried out in accordance with GB10067, 1 Chapter 7 and the following articles. 7.1 The factory inspection items of bell-type furnaces should include the following items. a, general inspection;
b. Safety inspection cover,
c.
Signage durability test
Inspection of furnace size and working area size, d.
Inspection of furnace marrow size and manufacturing quality (Applicable to RBG bell-type furnaces) e
f.
Inspection of furnace lining quality
9. Inspection of manufacturing quality of heating element fibers,
h.|| tt||Measurement of cold DC resistance of metal heating elements, inspection of the short circuit of the heating element to the furnace shell, measurement of
F
insulation resistance (applicable to bell-type furnaces with ovens before leaving the factory): k.
t.
Insulation withstand voltage test (applicable to bell-type furnaces before leaving the factory): calibration of temperature instruments,
m.
movement Cold state inspection of mechanism operation or action, inspection of interlock alarm system!
n.
Inspection of water, gas, hydraulic and pumping systems (when these systems are present) o
P.
Inspection sets of supporting parts , including inspection of model, specification, export certificate, q
supply scope, including inspection of integrity of factory technical documents, f, packaging particle inspection.
8
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.