JB/T 6206-1992 Indirect resistance furnace RCW series mesh belt resistance furnace
Some standard content:
JB/T6206-
Standard of the Machinery Industry of the People's Republic of China
Indirect Resistance Furnace
RCW Series Mesh Belt Resistance Furnace
1 Subject Content and Scope of Application
JB:6206--92
This standard specifies the requirements for RCW series mesh belt resistance furnace products (hereinafter referred to as mesh belt furnace), including varieties and specifications, technical performance, and ordering and supply conditions. This standard applies to mesh belt resistance furnaces designed according to the requirements of Articles 4.1.5.1 and 5.2, which are mainly used for quenching, carburizing, carbonitriding, tempering, annealing, normalizing, quenching and tempering, sintering and brazing of medium and small metal parts in natural atmosphere or controlled atmosphere. This standard also applies to similar mesh belt resistance furnaces, and different parts are specified separately. 2 Referenced standards
Basic technical conditions for electric heating equipment General part GB10067.1
GB10067.4
GB10066.1
GB10066.4
ZBK60001
3 Terminology
Basic technical conditions for electric heating equipment Indirect resistance furnace Test methods for electric heating equipment General part
Test methods for electric heating equipment Indirect resistance furnace Safety of electric heating equipment Part 1 General requirements Safety of electric heating equipment Part 4 General requirements for resistance furnaces Method for compiling product models of electric heating equipment
Except for the following supplementary provisions, the rest shall be in accordance with the provisions of Chapter 3 of GB10066.4. 3.1 Working area dimensions, mm
The dimensions of the furnace space that is allowed to place the charge, which are specified in the design of the mesh belt furnace and indicated on the drawings. The "width" in the working area dimensions is the width between the baffles on both sides of the mesh belt. When there is no baffle, its width is specified in the enterprise product standard or agreed upon by the supply and demand parties, but it shall not be narrower than 90% of the mesh belt width; "length", for a through mesh belt furnace, is the distance between the inner sides of the furnace increase at the charge inlet and outlet, and for a non-through mesh belt furnace, is the distance between the inner side of the furnace wall at the charge inlet and the lower bending point of the mesh belt in the furnace; "height" is the maximum height above the upper surface of the mesh belt that is allowed to place the charge.
3.2 Uniform temperature zone
The longitudinal section in the working area that is specified in the design of the mesh belt furnace and indicated on the drawings to maintain uniform temperature. Furnace temperature uniformity, ℃
The degree of temperature uniformity in the uniform temperature zone of the mesh belt furnace when the mesh belt furnace is in a thermally stable state at the test temperature. The furnace temperature uniformity is expressed as: the difference between the highest and lowest temperatures measured at each temperature measuring point in the uniform temperature zone when the furnace is empty. 3.4 Maximum unit load of mesh belt, kg/m
The maximum weight of furnace charge that can be loaded on the unit area of the mesh belt specified when the mesh belt furnace is designed. 4 Product classification
4.1 Varieties, specifications and uses
Approved by the Ministry of Machinery and Electronics Industry in 1992-0616
Implemented in 1993-01-01
JB:620692
4.1:1 Mesh belt furnaces are divided into multiple varieties according to the structural type, gas nitrogen and maximum operating temperature, as shown in Table 1. RCWA· mesh belt furnaces are mainly suitable for heat treatment such as tempering, annealing, aging of metal parts, as well as sintering and dehydrogenation of porcelain. RCWB, RCWC6 and RCWC7 mesh belt furnaces are mainly suitable for heat treatments such as tempering and annealing of metal parts. RCWC9 mesh belt furnaces are mainly suitable for heat treatments such as thin-layer carburizing, carbonitriding, and quenching of metal parts. RCWD6 mesh belt furnaces are suitable for heat treatments such as solid solution of aluminum alloys. RCWE6 mesh belt furnaces are mainly suitable for stress relief annealing, tempering and brazing of metal parts; RCWE9 and RCWE12 mesh belt furnaces are mainly suitable for sintering and welding of metal parts. RCWF6 mesh belt furnaces are mainly suitable for heat treatments such as tempering and stress relief annealing; RCWF8 and RCWF9 mesh belt furnaces are mainly suitable for heat treatments such as carburizing, carbonitriding, and quenching of metal parts. Table 1
Product code
RCWE12
Non-through type
Yellow through type
Non-through type
Natural gas
Natural gas nitrogen
Controlled gas fluorine
Maximum working temperature
Other maximum working temperature values are allowed in the enterprise product standards. In this case, the number in the product code (the working temperature divided by 100, without decimals) should be changed accordingly.
4.1.2 Each type of mesh belt furnace is divided into multiple specifications according to the size of the working area. Unless otherwise agreed upon by the supply and demand parties, the working area size (width × length × height) of the mesh belt guard shall comply with the following provisions: Minimum specification: 75mm × 900mm × 25mm
Other specifications: Width increases by 25mm, and increases by 50mm after reaching 300mm, length increases by 50mm, increases by 150mm after reaching 1050mm, increases by 300mm after reaching 1500mm, height increases by 25mm, and increases by 50mm after reaching 175mm. The position of the working area in the furnace shall be indicated on the attached drawing in the mesh belt furnace product manual. 4.1.3 Each mesh belt furnace manufacturer may choose from the varieties and specifications specified in Articles 4.1.1 and 4.1.2, and formulate their own enterprise product standards accordingly.
4.2: Model
The model of the mesh belt furnace shall be compiled in accordance with ZBK60001, and the technical level code shall be determined in accordance with Article 7.4 of this standard. 4.3 Main parameters
The following items should be listed separately for each model of mesh belt furnace in the enterprise product standard:23
Power supply voltage, V;
Power supply frequency, Hz;
Number of phases;
Total equipment power, kW;
Rated power, kW
Number of temperature control zones;
Connection method of heating elements;
Working temperature, ℃;
Working zone size, mm;
Length of uniform temperature zone, mm;
Productivity, kg/h;
Maximum unit load of mesh belt, kg/m;||tt| |Furnace temperature uniformity, ℃;
Furnace temperature stability, C;
Empty furnace loss, kW;
Surface temperature rise, ℃;
Empty furnace energy consumption, kW·h;
Mesh belt speed adjustment range, mm/min
JB6206—92
Applicable gas ammonia and gas (or liquid) consumption, Nm*/h (or kg/h) (applicable to RCWB, RCWC, RCWE and RCWFs.
type mesh belt furnace);
Water consumption, m/h;
Furnace body weight, t;
Furnace body dimensions, mm.
Note: ①Among them, s, t, and u are not used as assessment indicators; ②For mesh belt furnaces using non-metallic heating elements, the working voltage should be listed separately. 5 Technical requirements
5.1 General requirements
The mesh belt furnace shall comply with the relevant provisions of Chapter 5 of GB10067.4, GB5959.1 and GB5959.4. When there is a discrepancy between this standard and the provisions of these standards, this standard shall prevail.
5.2 Supplementary requirements for design and manufacturing
5.2.1 Overall design
The mesh belt furnace is mainly composed of the furnace body, transmission system, control cabinet, etc. The furnace body is a horizontal structure, mainly composed of furnace shell, furnace lining, heating elements, etc. The charge is placed on the mesh belt and enters the furnace with the mesh belt for heating. The mesh belt speed should be adjustable and run smoothly so that the charge does not deviate from the mesh belt. If necessary, baffles should be added on both sides of the mesh belt.
For the controlled atmosphere mesh belt furnace, the furnace cleaning and ventilation method in the furnace should be specified in the product manual. 5.2.2 Controlled gas fluorine
The controlled atmosphere used for chemical heat treatment and protection such as carburizing, carbonitriding, etc. in mesh belt furnaces of RCWB, RCWC, RCWE and RCWF can be endothermic nitrogen, exothermic atmosphere, nitrogen decomposition atmosphere, injection atmosphere, hydrogen, nitrogen atmosphere, etc. The type of controlled atmosphere used shall be agreed upon by the supplier and the buyer according to the requirements of the buyer (see Article 9.1). 5.2.3 Furnace shell
The furnace shell is welded from steel sections and steel plates, but the furnace shell of mesh belt furnaces of RCWB and RCWC shall be welded airtight. The entire furnace shell shall have sufficient strength and rigidity. Fasteners that penetrate the furnace lining shall be used as little as possible on the inner wall of the furnace shell, and the structure of the furnace shell opening shall be able to avoid warping. For RCWE and RCWF mesh belt furnaces, the furnace top should be designed to be movable or other structural types to facilitate the replacement and maintenance of the furnace tank. The movable furnace top should be equipped with a lifting ring. The gas outlet, thermocouple and heating element lead-out rod outlet should adopt a sealing structure. 5.2.4 Furnace lining
The material and structure of the furnace lining should meet the performance requirements of the mesh belt furnace (see Article 5.3). The lining of RCWA, RCWD6, RCWE and RCWF Class C mesh belt furnaces should be made of refractory fibers except for the load-bearing and collision-prone parts. The furnace lining in contact with carburizing gas ammonia should have anti-carburization ability and be able to work normally under this gas oxygen. 5.2.5 Furnace door
The mesh belt furnace should be equipped with a furnace door or heat-shielding curtain with adjustable opening height to reduce the escape of gas and oxygen and the intrusion of air. The furnace door should not be deformed at the highest working temperature.
5.2.6 Heating element
The design of the heating element should meet the working requirements of the mesh belt furnace. The element should be firmly installed and should not be displaced or loosened under normal working conditions. The heating element should be easy to disassemble and replace. When selecting the heating element of RCWB and RCWC mesh belt furnaces, the effect of gas ammonia on its material should be considered. 5.2.7 Drive system
The mesh belt should be driven by a drive device with adjustable speed within the specified range, and the mesh belt should be equipped with necessary positioning and tensioning devices. When a hand-crank mechanism is required in the drive device, it can be proposed in accordance with Article 9.2. 5.2.7.1 Mesh belt
The mesh belt of the mesh belt furnace should be woven with corresponding pre-heated alloy wire according to different maximum working temperatures. The mesh belt should be able to operate continuously and normally at the highest working temperature and the maximum unit load. 5.2.8 Furnace pot
There are two types of furnace pot structures, one is a horizontal through-type structure; the other is a non-through-type special-shaped structure (applicable to RCWF). The furnace pot should be made of heat-resistant alloy or non-metallic materials (such as corundum, etc.) that can meet the working conditions and service life of the mesh belt furnace. The furnace should run through the entire heating zone and extend to the outside of the opening of the heating zone. One end of the furnace pot should be fixed, and the other end should be equipped with a device for its thermal expansion and contraction. For the furnace pot of the RCWF mesh belt furnace, its rear end should be fixed and extend downward. The design and manufacture of the furnace should ensure that no deformation that hinders normal operation occurs at the working temperature within the specified service life. 5.2.9 Quenching trough, cooling trough, drop channel and return channel For RCWC9, RCWF8 and RCWF9 mesh belt furnaces, quenching troughs, drop channels and return channels should be provided. RCWC6 and RCWC7 mesh belt furnaces should be equipped with cooling troughs.
The quenching tank should be equipped with a heating and circulating cooling system for the quenching medium. The temperature in the medium should be automatically controlled. For mesh belt furnaces using liquid medium for quenching, the quenching tank should be equipped with a liquid level alarm. When the liquid level is lower than the warning position, an audible and visual alarm signal should be issued and the power supply of the mesh belt furnace should be cut off. The falling channel is the channel for the workpiece to fall into the quenching tank. Its lower end should be long enough to be immersed in the quenching medium. Liquid curtain devices should be installed on both sides of the falling channel. The liquid curtain formed should be sufficient to prevent the quenching medium vapor generated during the quenching of the workpiece from entering the furnace and affecting the oxygen in the furnace. The return channel for the mesh belt to return should be connected to the falling channel. A water seal should be installed at the outlet of the return channel, and a device for adjusting the water level should be installed in the water seal tank to prevent air from entering the furnace. A cooling device should be installed in the return channel to cool the mesh belt. The mesh belt should be heated and dried before it exits the water seal tank and enters the driving drum.
For mesh belt furnaces where the mesh belt returns directly from the furnace, a device to prevent air intrusion should be installed at the outlet of the mesh belt. 5.2.10 Mesh belt support
Mesh belt support has the types of support plate, roller, bracket, etc. The material and structure of mesh belt support should enable heat to be easily transferred to the furnace and enable it to work normally at the working temperature. Mesh belt support should be made of heat-resistant alloy or non-metallic material (such as silicon carbide, etc.) that can meet the working conditions and service life of mesh belt furnace. The friction between mesh belt support and mesh belt should be as small as possible. The design and manufacture of mesh belt support should ensure flexible movement at working temperature and under the specified production rate conditions, without jamming and collision. 25
5.2.11 Cooling system
JB6206-92
Mesh belt furnace used for brazing should be equipped with a cooling chamber with a water cooling jacket. For multi-zone automatic water temperature control, a thermometer should be installed in each zone, and the cooling system should be able to cool the workpiece from the highest working temperature to the temperature specified by the process under the specified production rate of the mesh belt furnace. When a circulating cooling system is required, it can be proposed in accordance with Article 9.2. 5.2.12 Furnace gas circulation system
RCWA, RCWB, RCWC and RCWD mesh belt furnaces should be equipped with fans and air guide plates with blades made of corrosion-resistant and heat-resistant materials for forced circulation of furnace gas. The fan shaft should have good sealing and reliable cooling. When the fan stops due to a fault, it should be able to automatically cut off the heating power supply. When other types and working temperatures of mesh belt furnaces are required to be equipped with fans, it can be proposed in accordance with Article 9.2. 5.2.13 Discharging device and lifting device
RCWC and RCWF mesh belt furnaces should be equipped with a discharging device. When the purchaser requires it (see Article 9.2), it should also be equipped with a workpiece lifting device. The types of the two devices should be determined by the supply and demand parties according to the purchaser's requirements (see Article 9.2). 5.2.14 Fire curtain or air curtain
'The inlet and outlet of RCWB and RCWE mesh belt furnaces, as well as the inlet of RCWC and RCWF mesh belt furnaces, should be equipped with fire curtains or air curtains or other measures should be taken to prevent air from entering the furnace and affecting the furnace gas composition and reducing furnace gas loss. 5.2.15 Measurement, control and recording
The measurement, control and recording of mesh belt furnaces shall comply with Article 5.2.7 of GB10067.4 and the following supplementary provisions. 5.2.15.1 Temperature instrument
The control type of the temperature control instrument of the mesh belt furnace should generally adopt the time proportional type, or other technically more advanced types. For Class A mesh belt furnaces, the general position control type can be retained. The C-class mesh belt furnace shall be equipped with a microprocessor digital display temperature control instrument with a temperature setting accuracy of not less than 0.5% and a resolution of not less than 1°C. The digital height should not be less than 14.3mm, and the instrument shall be equipped with an external socket for connecting a recorder or printer.
The effective width or diameter of the recording paper of the temperature recorder shall not be less than 150mm. When a printer is required to replace the recorder, it can be requested in accordance with Article 9.2.
5.2.15.2 Atmosphere Control Instruments
RCWC9, RCWF8, RCWF9 Class B and Class C mesh belt furnaces used for carburizing shall be equipped with instruments and corresponding sensor elements for indicating, controlling and recording the carbon potential of furnace gas; if there is such a requirement for Class A mesh belt furnaces, it can be requested in accordance with Article 9.2. The type and technical performance of the instrument shall be specified in the enterprise product standards of the mesh belt furnace, or agreed upon by the supply and demand parties (see Article 9.2). 5.2.16 The mesh belt furnace product shall have reliability indicators. 5.3 Performance requirements
The performance of the mesh belt furnace shall comply with the requirements of Article 5.3 and the following articles of GB10067.4. 5.3.1 Working temperature
The working temperature of the mesh belt furnace shall comply with the provisions of Table 2. Table 2
Maximum working temperature
350<0500
500<750
750<0≤950
Working temperature
300~8,
Within the working temperature range, the mesh belt furnace shall meet the furnace temperature uniformity and furnace temperature stability requirements of Articles 5.3.4 and 5.3.5. 5.3.2 Maximum unit loading capacity of mesh belt
JB620692
The maximum unit loading capacity of mesh belt of mesh belt furnace shall comply with the provisions of enterprise product standards or be agreed upon by both supply and demand parties. 5.3.3 Productivity
The productivity of the mesh belt furnace shall comply with the provisions of the enterprise product standards. 5.3.4 Furnace temperature uniformity
The furnace temperature uniformity of the mesh belt furnace shall comply with the following provisions: Class A furnace ≤15℃
Class B furnace ≤10℃
Class C furnace ≤5℃
5.3.5 Furnace temperature stability
The furnace temperature stability of the mesh belt furnace shall not exceed the following specified range: Class A furnace ±5.0℃
Class B furnace ±2.5℃
Class C furnace ±1.0℃
5.3.6 Surface temperature rise
When the mesh belt furnace is in a thermally stable state at the highest operating temperature, the surface temperature rise of the furnace shell and the furnace top plate shall comply with the provisions of Table 3. The surface temperature rise of the operating handle or hand wheel, etc. shall not exceed 25℃. Table 3
Maximum operating temperature
1000<6≤1200
5.3.7 Empty furnace loss
Furnace top plate
Furnace top plate
The empty furnace loss of mesh belt furnace shall comply with the provisions of enterprise product standards. 5.3.8 Empty furnace energy consumption
The empty furnace energy consumption of mesh belt furnace shall comply with the provisions of enterprise product standards. 5.3.9 Noise
With fan
Without fan
With fan
Without fan
For mesh belt furnaces equipped with fans, the noise in the working area shall comply with the provisions of relevant standards. 5.3.10 Others
Surface temperature rise
The performance of other aspects of mesh belt furnace shall comply with Article 5.2 of this standard, as well as the corresponding provisions in enterprise product standards and supply contracts. 5.4 Complete set requirements
5.4.1 The complete set supply scope of mesh belt furnace specified by the supplier should be listed in the enterprise product standards, which should mainly include the following items: a...Mesh belt furnace body;
quenching tank or cooling tank and discharging device (applicable to RCWC and RCWF mesh belt furnaces); control cabinet;
temperature instrument;
thermocouple;
compensation wire;
carbon potential control instrument and corresponding sensor element (applicable to RCWC9, RCWF8 and RCWF9 B and C27 mesh belt furnaces for carburizing);
h. Spare parts;
JB6206-92
1. "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, should 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 purchaser requires the following accessories or devices, they may be requested in accordance with Article 9.2, and the necessary technical requirements shall be agreed upon by the supply and demand parties. a.
Electric energy meter and (or) other measuring instruments not specified in this standard; program controller;
Control gas generating device and (or) its accessories (applicable to RCWB, RCWC, RCWE and RCWE type mesh belt furnace); c.
Carbon potential control instrument and corresponding sensor element (applicable to RCWC9, RCWF8 and RCWF9 type A mesh belt furnace); liquid storage tank (applicable to liquid dripping RCWB, RCWC, RCWE and RCWF type mesh belt furnace); loading table and unloading table;
Material tray and clamp.
6 Test method
The test method of mesh belt furnace shall be carried out in accordance with the corresponding provisions of GB10066.1 and GB10066.4 and the following supplementary provisions. When there is a discrepancy between this standard and the provisions of these standards, this standard shall prevail. During the measurement, the fan and mesh belt shall run at normal or low speed, and the furnace door shall be closed to the lowest position. : 6.1 Measurement of empty furnace loss
The thermal stability state and empty furnace loss of mesh belt furnace shall be measured by "surface temperature rise method" in accordance with the provisions of Article 6.9 of GB10066.4. . The measurement shall be carried out under the condition of normal working atmosphere in the furnace. 6.2 Measurement of furnace temperature uniformity and furnace temperature stability Test temperature: for A-level and B-level mesh belt furnaces, it is the highest working temperature; for C-level mesh belt furnace, it is the highest working temperature and the lowest working temperature respectively.
The measurement shall be carried out under the condition of natural atmosphere in the furnace. 6.2.1 Measurement of furnace temperature uniformity
6.2.1.1 The dimensions of the temperature measurement zone shall comply with the following provisions; “width” is the width of the uniform temperature zone minus 10mm at both ends; “length” and “height” are the “length” and “height” of the uniform temperature zone, and the “width” and “height” of the uniform temperature zone are the “width” and “height” of the working area. The "length" of the uniform temperature zone; when the length of the working zone is longer than or equal to 3m: for a through-type mesh belt furnace, its length shall not be shorter than 70% of the length of the working zone, and its position shall be specified in the attached figure of the enterprise product standard; for a non-through-type mesh belt furnace, one end of its length is the lower bending point of the mesh belt in the furnace, and the other end shall be specified in the attached figure of the enterprise product standard, but for a mesh belt furnace used only for quenching, its length shall not be shorter than 50% of the length of the working zone, and for a mesh belt furnace used for carburizing, carbonitriding and tempering, its length shall not be shorter than 70% of the length of the working zone; when the length of the working zone is shorter than 3m, its length shall be specified in the enterprise product standard or agreed upon by the supply and demand parties, and its position shall be specified as above.
6.2.1.2 The temperature measurement point is determined as follows:
Make a cross section perpendicular to the longitudinal axis of the temperature measurement zone, intersecting with the interface of the temperature measurement zone to form a rectangle, and take the two center points of the rectangular side and the center point of the rectangle (three points in total) as the temperature measurement points of the cross section. The longitudinal measurement positions are specified as follows: two are located on the two horizontal end surfaces of the temperature measurement zone, and the rest are evenly distributed in the temperature measurement zone. The distance between the two measurement positions should be 200-300mm. 6.2.1.3 Measurement method
This standard adopts the temperature measurement point moving method. Put the steel frame with three thermocouples fixed on the mesh belt, move it at a low speed with the mesh belt, and perform cyclic measurement at each specified longitudinal position in turn. In each cyclic measurement, the temperature at the three temperature measurement points should be measured with a digital meter in the shortest possible time. The number of cyclic measurements should be no less than 3 times, and then the average value of each temperature measurement point is calculated, and the maximum temperature difference is the measured furnace temperature uniformity.
6.2.2 Measurement of furnace temperature stability
JB6206-92
The measurement of furnace temperature stability should be carried out immediately after the measurement of furnace temperature uniformity. For mesh belt furnaces with on-off temperature control, the maximum and minimum values of the temperature of the temperature control point in five control cycles should be continuously measured, and the average values of these maximum and minimum values should be taken as the highest and lowest values of the temperature of the temperature control point. For mesh belt furnaces with continuous temperature control, the temperature of the temperature control point should be continuously tracked and measured for at least 30 minutes to obtain its highest and lowest values.
In the above measurement, the temperature of the temperature control point should be measured at intervals of 3 minutes for at least 30 minutes, and the average value of all measured values (at least 11) is the average value of the temperature of the temperature control point. The difference between the measured highest and lowest values and the average value of the temperature of the temperature control point (marked with positive and negative signs respectively) is the measured furnace temperature stability. For multi-zone mesh belt furnaces, the furnace temperature stability of each zone should be calculated. 6.3 Measurement of surface temperature rise
In the thermally stable state at the highest operating temperature of the mesh belt furnace, the surface temperature is first measured according to the provisions of Article 7.2.1 of GB10066.1, and the surface temperature rise is obtained by subtracting the ambient temperature during measurement. The measurement point should be located at any point on the outer surface of the furnace shell, furnace roof, operating handle, etc., except near the furnace mouth, and within 75mm from the edge of the heating element and thermocouple lead-out hole and the center of the fastener penetrated by the furnace lining. The exhaust pipe wall and its vicinity should also be excluded. The vicinity should be specified in the enterprise product standard. 6.4 Productivity measurement and charging operation test Unless otherwise arranged by the manufacturer, the productivity measurement and charging operation test are carried out at the user's site. The material, shape, size, weight, placement method and heating process of the charge shall be in accordance with the enterprise product standard or agreed upon by the supply and demand parties. The charge shall be provided by the user. When the mesh belt furnace is under normal operating conditions and is in a thermally stable state, the charge is continuously loaded into the furnace for heating treatment according to the regulations or agreed requirements, and the furnace is operated for more than 8 hours at the highest operating temperature, and then the furnace is stopped and the productivity is calculated. Inspection rules and classification
The inspection and classification of mesh belt furnaces shall be carried out in accordance with Chapter 7 and the following provisions of GB10067.1. 7.1 The factory inspection items of mesh belt furnace should include the following: a.
General inspection;
Safety inspection;
Durability test of label writing;
Inspection of working area size;Www.bzxZ.net
Inspection of uniform temperature zone length;
Inspection of furnace tank size and manufacturing quality (applicable to mesh belt furnace with furnace tank); inspection of furnace lining quality;
Inspection of heating element manufacturing quality;
Measurement of cold DC resistance of metal heating element: y
Inspection of short circuit of heating element to furnace shell;
k. ·Insulation resistance measurement (applicable to mesh belt furnaces for baking before leaving the factory); insulation withstand voltage test (same as above);
calibration of temperature instruments;
cold state inspection of the operation or action of the motion mechanism; inspection of the interlock alarm system;
p. inspection of the water circuit, gas circuit and wave pressure system (when these systems are available); q
inspection of accessories, including inspection of model, specification and factory certificate of conformity; scope of supply, including inspection of the integrity of factory technical documents; packaging inspection.
JB620692
The type inspection items of mesh belt furnace shall include the following a.
, all factory inspection items (under type inspection conditions); circuit test:
measurement of rated power;
measurement of maximum working temperature;
measurement of empty furnace loss;
measurement of empty furnace energy consumption;
measurement of furnace temperature uniformity;
measurement of furnace temperature stability;
measurement of surface temperature rise;
measurement of productivity;
hot inspection of the operation or action of the motion mechanism; inspection after hot test.
When required (see Article 9.2), a charging operation test shall be carried out. 7.3 After the process inspection or industrial operation inspection of the mesh belt furnace is completed, the following two tests should be carried out again: a.
Measurement of surface temperature rise;
Measurement of furnace temperature uniformity.
The retest results should comply with the provisions of this standard, and the measurement value of item b shall be used as the basis for the technical classification of mesh belt furnace products (see Article 7.4). 7.4 The technical classification of mesh belt furnaces shall be as specified in Table 4. Mesh belt furnaces of various technical levels shall fully meet the requirements listed in the table and other provisions of this standard.
Technical level
Control instruments
According to Article 5.2.4
According to Article 5.2.7.3 of GB10067.4 and Article 5.2.15 of this standard.3.4, 5.3.5 and 7.3 requirements
Can provide
Complete equipment according to the requirements of Article 5.4.1
Can provide complete equipment according to the requirements of Articles 5.4.1 and 5.4.2
Net-belt furnace is a national-level superior product and should technically meet the requirements of Class C above. Marking, packaging, transportation and storage
The marking, packaging, transportation and storage of net-belt furnaces should comply with the provisions of Chapter 8 of GB10067.1. The following items should be marked on the nameplate of the mesh skirt furnace: a.
Product model and name;
Power supply voltage, V;
Power supply frequency, Hz;
Number of phases;
Total power of equipment, kW;
Rated power, kW;
Connection method of heating elements (applicable to three-phase mesh belt furnace); c
Can complete sets of equipment be provided in accordance with the requirements of Articles 5.4.1 and 5.4.2
h. Main operating temperature, C;||t t||Working area size, mm;
Mesh belt speed adjustment range, mm/min;
JB6206-92
.ki:: Applicable nitrogen and gas (or liquid) consumption, Nm/h (or kg/h) (applicable to RCWB, RCWC, RCWE and RCWF mesh belt furnaces);
Furnace weight, t;
Product number;
Manufacture date;
Manufacturer name (country name should be indicated for export products). Ordering and supply
The ordering and supply of mesh belt furnaces shall comply with the provisions of Chapter 9 of GB10067.1. For RCWB, RCWC, RCWE and RCWF mesh belt furnaces, the type of atmosphere used (endothermic, exothermic, nitrogen decomposition, organic liquid cracking, etc.) shall be stated in the ordering documents. 9.2
If the purchaser has the following special requirements, they may propose them to the supplier: 9.2.1
Different requirements for the unit system, power supply voltage, power supply frequency, etc. (see Article 5.1.1.1 of GB10067.1); Different requirements for the use environment (see Article 5.1.2 of GB10067.1); Additional requirements for safety and environmental protection (see Article 5.1.5.1 of GB10067.1); Different requirements for painting (see Article 5.2.7 of GB10067.1); Special requirements for packaging (see Article 8.2.5 of GB10067.1); Different requirements for power supply (see Article 5.2.2 of GB10067.4); Different requirements for thermocouple lead wires or compensation wires Different requirements for length (see GB10067.4 Article 5.2.7.1); Different requirements for temperature instrument types (see GB10067.4 Articles 5.2.7.3 and 5.2.7.6, and Article 5.2.15 of this standard); No requirement for over-temperature controller (see GB10067.4 Article 5.2.7.7); Requirement to provide cumulative timer (see GB10067.4 Article 5.2.7.10); Requirement for control cabinet (station) to have vibration absorption device (see GB10067.4 Article 5.2.7.12); Requirement to configure hand-crank mechanism in the drive device (see Article 52.7); Requirement for cooling system to be circulating cooling type (see Article 5.2.11); Other types and The mesh belt furnace with working temperature requires the configuration of fans (see Article 5.2.12); requires the configuration of workpiece lifting devices (see Article 5.2.13); requirements for the types of discharge devices and lifting devices (see Article 5.2.13); requires the provision of printers instead of recorders (see Article 5.2.15.1); RCWC9, RCWF8 and RCWF9 Class A mesh belt furnaces require the provision of carbon potential control instruments and corresponding sensor elements (see Articles 5.2.15.2 and 5.4.2, item d);
requirements for the types and technical performance of instruments used to measure carbon potential (see Article 5.2.15.2); different requirements for the supply items specified by the supplier (see Article 5.4.1); requires the provision of electric energy meters and ( or) other measuring instruments not specified in this standard (see item a of Article 5.4.2); require the provision of program controllers (see item b of Article 5.4.2); require the provision of control gas generation devices and (or) their accessories (see item c of Article 5.4.2); require the provision of liquid storage tanks (see item e of Article 5.4.2); require the provision of loading and unloading platforms (see item f of Article 5.4.2); require the provision of material trays and fixtures (see item g of Article 5.4.2); require the provision of loading and running tests (see Article 7.2); the supplier shall try its best to meet the special requirements of the buyer, but the special requirements that can actually be selected by the buyer shall be determined by the supplier in accordance with their respective conditions with reference to this standard. Some of them can be listed in the enterprise product standards, and the rest shall be agreed upon by the supplier and the buyer when placing an order. Enterprise Standard
The enterprise standard of mesh belt furnace shall be formulated in accordance with the provisions of Article 1.3.3 of GB-10067.1 and in accordance with this standard, and shall meet the requirements of this standard. The enterprise product standards of mesh belt furnaces that differ in design from the requirements of Articles 4.1.5.1 and 5.2 shall be formulated in accordance with this standard, and their technical performance shall meet the requirements of Article 5.3 of this standard unless otherwise specified or otherwise agreed upon by the supply and demand parties. Before Chapter 1 of the enterprise product standard of mesh belt furnace, it shall be stated: "This standard is formulated in accordance with (or with reference to) JB6206-92". Additional Notes:
This standard is proposed and managed by the National Technical Committee for Standardization of Industrial Electric Heating Equipment. This standard was drafted by Xi'an Electric Furnace Research Institute, Suzhou Wuxian Heat Treatment Equipment Factory and Shanghai Electric Furnace Factory. The main drafters of this standard are Cao Wenxiu, Jin Taoyuan, Qian Yongxing and Kou Jun.11); other types and working temperature mesh belt furnaces require fans (see Article 5.2.12); require workpiece lifting devices (see Article 5.2.13); requirements for the type of discharge device and lifting device (see Article 5.2.13); require a printer to replace the recorder (see Article 5.2.15.1); RCWC9, RCWF8 and RCWF9 Class A mesh belt furnaces require carbon potential control instruments and corresponding sensor elements (see Articles 5.2.15.2 and 5.4.2, item d);
requirements for the type and technical performance of instruments used to measure carbon potential (see Article 5.2.15.2); different requirements for the supplier's specified supply items (see Article 5.4.1); require the provision of Energy meter and (or) other measuring instruments not specified in this standard (see item a of Article 5.4.2); program controller is required (see item b of Article 5.4.2); control gas generator and (or) its accessories are required (see item c of Article 5.4.2); liquid storage tank is required (see item e of Article 5.4.2); loading platform and unloading platform are required (see item f of Article 5.4.2); material tray and clamp are required (see item g of Article 5.4.2); loading operation test is required (see Article 7.2); the supplier shall try to meet the special requirements of the buyer, but the special requirements that can be selected by the buyer shall be determined by the supplier according to their own conditions in reference to this standard. Some of them can be listed in the enterprise product standards, and the other parts shall be agreed upon by the supplier and the buyer when placing an order. Enterprise Standard
The enterprise standard of mesh belt furnace shall be formulated in accordance with the provisions of Article 1.3.3 of GB-10067.1 and in accordance with this standard, and shall meet the requirements of this standard. The enterprise product standards of mesh belt furnaces that differ in design from the requirements of Articles 4.1.5.1 and 5.2 shall be formulated in accordance with this standard, and their technical performance shall meet the requirements of Article 5.3 of this standard unless otherwise specified or otherwise agreed upon by the supply and demand parties. Before Chapter 1 of the enterprise product standard of mesh belt furnace, it shall be stated: "This standard is formulated in accordance with (or with reference to) JB6206-92". Additional Notes:
This standard is proposed and managed by the National Technical Committee for Standardization of Industrial Electric Heating Equipment. This standard was drafted by Xi'an Electric Furnace Research Institute, Suzhou Wuxian Heat Treatment Equipment Factory and Shanghai Electric Furnace Factory. The main drafters of this standard are Cao Wenxiu, Jin Taoyuan, Qian Yongxing and Kou Jun.11); other types and working temperature mesh belt furnaces require fans (see Article 5.2.12); require workpiece lifting devices (see Article 5.2.13); requirements for the type of discharge device and lifting device (see Article 5.2.13); require a printer to replace the recorder (see Article 5.2.15.1); RCWC9, RCWF8 and RCWF9 Class A mesh belt furnaces require carbon potential control instruments and corresponding sensor elements (see Articles 5.2.15.2 and 5.4.2, item d);
requirements for the type and technical performance of instruments used to measure carbon potential (see Article 5.2.15.2); different requirements for the supplier's specified supply items (see Article 5.4.1); require the provision of Energy meter and (or) other measuring instruments not specified in this standard (see item a of Article 5.4.2); program controller is required (see item b of Article 5.4.2); control gas generator and (or) its accessories are required (see item c of Article 5.4.2); liquid storage tank is required (see item e of Article 5.4.2); loading platform and unloading platform are required (see item f of Article 5.4.2); material tray and clamp are required (see item g of Article 5.4.2); loading operation test is required (see Article 7.2); the supplier shall try to meet the special requirements of the buyer, but the special requirements that can be selected by the buyer shall be determined by the supplier according to their own conditions in reference to this standard. Some of them can be listed in the enterprise product standards, and the other parts shall be agreed upon by the supplier and the buyer when placing an order. Enterprise Standard
The enterprise standard of mesh belt furnace shall be formulated in accordance with the provisions of Article 1.3.3 of GB-10067.1 and in accordance with this standard, and shall meet the requirements of this standard. The enterprise product standards of mesh belt furnaces that differ in design from the requirements of Articles 4.1.5.1 and 5.2 shall be formulated in accordance with this standard, and their technical performance shall meet the requirements of Article 5.3 of this standard unless otherwise specified or otherwise agreed upon by the supply and demand parties. Before Chapter 1 of the enterprise product standard of mesh belt furnace, it shall be stated: "This standard is formulated in accordance with (or with reference to) JB6206-92". Additional Notes:
This standard is proposed and managed by the National Technical Committee for Standardization of Industrial Electric Heating Equipment. This standard was drafted by Xi'an Electric Furnace Research Institute, Suzhou Wuxian Heat Treatment Equipment Factory and Shanghai Electric Furnace Factory. The main drafters of this standard are Cao Wenxiu, Jin Taoyuan, Qian Yongxing and Kou Jun.
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