Some standard content:
J78 | | tt | | JB |
Ministry of Machinery Industry of the People's Republic of China
Released
Implemented on 1994-07-01
Machinery Industry Standards of the People's Republic of China
Vacuum-pressure impregnation equipment
Subject content and scope of application
JB/T6923-93
This standard specifies the type and basic parameters, technical requirements, test methods, and inspection rules of vacuum-pressurized collapse equipment. and marking, packaging and transportation requirements.
This standard applies to vacuum-pressurization equipment (hereinafter referred to as equipment) for the purpose of increasing the insulation resistance and compressive strength of electrical components, reducing dielectric loss, increasing the strength of wood, and anti-corrosion of wood and textiles. ). Reference standards
2
GB150
GB191
GB6070
GB/T13384
JB1090~1092
Type and basic Parameters
3
2
Steel pressure vessel
Packaging, storage and transportation icon mark
Vacuum flange
General mechanical and electrical product packaging Technical conditions
Type and size of rubber sealing ring for vacuum
The end body used to complete the impregnation process and store the impregnation agent, which are respectively called the impregnation end and the agent storage tank, the flood tank and the The structural type of the storage tank is usually a vertical round simple end body. The main parameters of the equipment should comply with the requirements in the table below. Parameter name
Tank inner diameter\
mm
Ultimate pressure
MPa
Lecture tankwww.bzxz.net
Huan agent tank||tt| |Pumped from the atmosphere to
Pumping time
min
Pure pressurization rate of the media system
Pa/mim
Humidity rising rate of the ulcer agent| |tt||c/h
collapse agent cooling rate
collapse tank charging and pressure increasing time
tank volume
m
Pa| |tt||<15
15~30
30100
manga
collapse
can
bright agent tank||tt| |Pressure differential infusion method
Pump infusion method
c/h
min
Approved by the Ministry of Machinery Industry on 1993-07-13
Parameter values
500*,630*.800',1000.1250*.1600'.1800.2000',2500*,3200',4000*,4200,4400
500*,630*,800*,1000 ',1250*,1400.1600',2000'2200
A
≤7×10
1.5
B
4
10
20
30
≤60
1.2
≤3
>10
≥60||tt| |10
20
c
14
20
Implemented on 1994-07-01
1
Note, 1>Those with and numbers are preferred,
4 Technical requirements
4.1 Conditions of use
Temperature, 5~35C
a.
b.| |tt||Relativity, not more than 80%;
Cooling water outlet temperature, not higher than 35℃+
e
JB/T 692393
d.
The quality of circulating water for cooling, heating, etc.; use city tap water or water of equivalent quality. The environment and equipment site indoors should be clean, ventilated, and explosion-proof. The floor, ceiling, and surrounding walls should be clean. The air should be clean. Dust or gas that can cause surface corrosion of electrical appliances and other metal parts or cause electrical conduction between metals is not allowed to exist. 4.2 Structural requirements
4.2.1 The tank is equipped with evacuation, inflation, deflation and liquid delivery pipes, and is equipped with interfaces such as vacuum gauges, pressure gauges, pressure transmitters and explosion-proof safety valves. It is also equipped with Liquid level indicator, controller. 4.2.2 The tank or tank is equipped with two observation windows, one of which is equipped with a light on the outside. 4.2.3 The tank or dosing pipeline is equipped with a temperature measuring joint and a thermometer near the end body. 4.2.4 The structural type and size of the vacuum static and dynamic seals of the equipment should comply with the regulations of GB6070 and JB1090~1092. 4.2.5 The equipment and its heavy electric control cabinets and other ancillary devices should be equipped with facilities to facilitate lifting, such as lifting holes, lifting rings, etc. 4.2.6 The structural design of the pressure vessel in the equipment should comply with the relevant regulations of GB150. 4.3 Manufacturing quality
4.3.1 The materials of the main parts and components of the equipment should not only comply with the corresponding material standards and have quality certificates, but also comply with the requirements of vacuum performance and pressure vessels, and surface treatment should be carried out if necessary ( Such as both light and plating). 4.3.2 Roughness R of the internal surface of the equipment and each sealing surface. The value should not be greater than 3.2μm, and each sealing surface should have no scratches or scars that affect the sealing performance.
4.3.3 The mechanical processing, welding quality and assembly quality of the equipment should comply with the provisions of the manufacturer's technical documents. During assembly, all surfaces that are under vacuum during work should be vacuum cleaned and dried. After assembly, each rotating part should be able to rotate flexibly without any abnormality. The lifting mechanism should move smoothly without shaking. Dynamic seals that require grease, such as Weishi dynamic seals, should be filled with vacuum grease. 4.3.4 The self-made or purchased parts and components used in the equipment should comply with the corresponding product standards and should have quality certificates. 4.3.5 The manufacturing quality of the electrical devices supporting the equipment should comply with the provisions of the manufacturer's technical documents, and the safety and reliability of the equipment should be ensured during operation. The layout of the central wiring of the device should be neat and clear for easy maintenance. 4.3.6 The appearance quality of the equipment should be such that there are no sharp corners, edges, protrusions or rough uneven surfaces that are not required for functionality. The edges of the joint surfaces of parts and components should be neatly aligned without obvious misalignment. The key layer of metal parts should be firm and free from deterioration, peeling, rust, etc., and all fasteners should have an anti-corrosion layer. The coated surface of the equipment should be smooth, beautiful, and firm, without peeling or peeling. 4.3.7 The manufacturing quality of the pressure vessels in the equipment should comply with the provisions of Chapter 10 of GB150. 4.4 Safety protection requirements
4.4.1 The water-cooling system in key parts should have alarm devices for water cutoff or insufficient water pressure, and should be interlocked with the power supply, vacuum system, and transmission system. The actions of these protection mechanisms should be sensitive and reliable. 4.4.2 The tank filling valve and the main pumping valve and the main pumping and pre-pumping valves should be kept interlocked. In the event of a sudden power outage, the solenoid valve should be able to close automatically. 4.4.3 The equipment and its associated electrical devices should be equipped with grounding devices, and the grounding point should be clearly marked. In order to prevent the flow of the flood agent from causing static rain discharge and fire, the flood tank and storage tank are equipped with independent electrostatic grounding. device to conduct static charges underground, the resistance of the grounding installation should not be greater than 49.
4.4.4 Several connected wires shall not be installed in the wire tube or on the distribution board. The entrance and exit of the wire and the place where it passes through the metal wall should be protected by a smooth insulating tube or the inner hole of the tube opening should be lined with soft material. Insulating rings, 4.4.5 The electrical circuits and electrical components on the equipment should be protected from coolant, lubricating oil and other harmful substances. Electrical components should be explosion-proof to ensure safety.
2
JB/T 6923-93
4.4.6 After a sudden power outage during operation, the equipment should be able to prevent the electrical appliances from turning on themselves when power is restored. 4.4.7 In the electrical circuit of the equipment, short-circuit protection and over-current protection should be adopted according to the load condition. 4.4.8 Exposed gears, pulleys, etc. should have reliable protection devices. 4.4.9 The equipment and its ancillary loads should be equipped with placards or marks required for operation and safety. The placards and marks should be solid and their writing should remain clear during the normal use period of the equipment.
5 test method
5.1
Ultimate pressure in tank
B.
b.
e.
tank The body is empty (no items to be immersed are placed): The vacuum gauge tube should be installed on the side of the tank or on the upper cover, and the end of the pipe should protrude about 5mm from the inner wall: the vacuum gauge used must be tested for dry air by a nationally approved measurement department. Calibration, and within the validity period, the equipment is allowed to be degassed by the heating device equipped with the equipment itself during the degassing process: d.:| |tt | value. 5.2 Pumping time
The time required for the equipment to be pumped to the pressure specified in the table in Chapter 3 after the pressure in the wall reaches the ultimate pressure under continuous working conditions, and the missing body is exposed to the atmosphere for 30 minutes. , set as the pumping time of the equipment. 5.3 Tank system pressure increase rate
Pump the tank system to the ultimate pressure, close the valve between the tank and the vacuum system, and turn off each vacuum pump. When the internal pressure of the body system rises to p, (=30Pa), start timing. When △z (=30min) passes, record the corresponding pressure P:, take the pressure reading to two significant figures, and calculate p=p, 1, and The △p and △ values ??measured three times in a row are substituted into the following formula to calculate, and the average value of the calculation results is used as the pressure increase rate R that characterizes the leakage characteristics of the tank system.
In the formula: R-chain system pressure increase rate, Pa/min: Re
At
Ap-pressure increment, Pa, p=pp,=p30Pa;—— Time increment, min, = 30min.
5.4 Impregnating agent heating rate
Measure the temperature difference between the impregnating agent from the storage temperature (pressure difference infusion) or the initial temperature of pipeline heat exchange (pumping agent) to the impregnating agent working temperature and the time required, and divide the temperature difference by the time to calculate the heating rate (C/h). 5.5 Cooling rate of the impregnating agent
Measure the temperature difference and the time required for the impregnating agent to drop from the operating temperature to the storage temperature, and divide the temperature by the time to calculate the cooling rate (C/h).||tt| |Impregnation seam inflation and pressure rise time
5.6
Inflate into the medullary to raise the pressure from the vacuum state to the working pressure state, and measure the time required for the inflation process. 5.7 Liquid in the tank
Use the upper and lower liquid level control devices set up on the flood tank and storage tank and the continuous liquid level display device set up on the liquid end to observe changes in the liquid level.
5.8 Electronic control system
Through the actual operation of automatic or manual control devices and necessary interlocking and recording devices, test whether the actions of each device in the electronic control system are flexible and reliable, and whether the display is correct. 6 Inspection Rules
6.1 Each piece of equipment and its ancillary devices must be inspected by the quality inspection department of the manufacturer in accordance with the provisions of this standard and technical documents. Inspection 3
JB/T6923-93|| tt||The product certificate must be qualified and signed by the inspection department and inspection personnel before it can leave the factory. 6.2 The equipment should be inspected one by one. The content includes the items specified in Chapters 3, 4 and 5.7 and 5.8 of Chapter 5 of this standard. In addition, the no-load power-on test of the electrical devices matched with the filter equipment and the insulation resistance inspection of each electrical part should also be carried out. 6.3 Testing and inspection should be carried out in accordance with the methods specified in Chapter 5 of this standard and Chapter 10 of GB150. 6.4 All tools, instruments and instruments used for inspection should have certificates of conformity. 7 Marking, Packaging and Transportation
7.1 Marking
Each piece of equipment and its ancillary devices should be equipped with a sign on its visible part. The content of the sign should at least include the name of the manufacturer, the name and model of the equipment, and the serial number. , manufacturing date, etc.
7.2 Packaging
7.2.1 The packaging of equipment should take shockproof, moisture-proof, rainproof, and dustproof measures to ensure that the equipment will not be damaged or rusted during loading, unloading, and transportation.
7.2.2 The packaging appearance of the equipment should have a shipping mark that is waterproof and not easy to fall off. The packaging and transportation operation marks of the equipment should comply with the regulations of GB191.
7.2.3 The packaging of export products shall comply with the regulations of GB/T13384. :7.2.4 The equipment that is packaged as a whole should be packaged in a pumped or vacuum state. Before packing, the residual water and debris in the equipment should be removed, and the sealing surfaces should be ensured not to be damaged. Apply anti-rust grease to metal surfaces that have not undergone anti-rust treatment (such as cleaning rails, etc.). 7.2.5 The accompanying documents should include: packing list, export certificate, instructions for use, etc. The random documents should be stored in impermeable plastic bags.
7.3 Transportation
7.3.1 The transportation methods and measures of the equipment should be able to ensure that the equipment and its packaging will not cause damage. The equipment should be equipped with anti-loose guards and supports during transportation to ensure zero, Components should not come loose, and measures should be taken to prevent rain and bags during transportation. 7.4 The quality certificate, standard table, paint, packaging, and transportation of the pressure vessels in the equipment should comply with the provisions of Article 10.10 of GB150. Additional explanation:
This standard is proposed by the National Technical Committee for Standardization of Vacuum Technology. This standard is under the jurisdiction of Shenyang Vacuum Technology Research Institute of the Ministry of Machinery Industry. This standard is drafted by Shenyang Vacuum Technology Research Institute. The main drafters of this standard are Zhang Yao, Wang Ziwen and Li Yuying.5. Random documents should include: packing list, export certificate, instructions for use, etc. The random documents should be stored in impermeable plastic bags. | | tt | Components should not come loose, and measures should be taken to prevent rain and bags during transportation. 7.4 The quality certificate, standard table, paint, packaging, and transportation of the pressure vessels in the equipment should comply with the provisions of Article 10.10 of GB150. Additional explanation:
This standard is proposed by the National Technical Committee for Standardization of Vacuum Technology. This standard is under the jurisdiction of Shenyang Vacuum Technology Research Institute of the Ministry of Machinery Industry. This standard is drafted by Shenyang Vacuum Technology Research Institute. The main drafters of this standard are Zhang Yao, Wang Ziwen and Li Yuying.5. Random documents should include: packing list, export certificate, instructions for use, etc. The random documents should be stored in impermeable plastic bags. | | tt | Components should not come loose, and measures should be taken to prevent rain and bags during transportation. 7.4 The quality certificate, standard table, paint, packaging, and transportation of the pressure vessels in the equipment should comply with the provisions of Article 10.10 of GB150. Additional explanation:
This standard is proposed by the National Technical Committee for Standardization of Vacuum Technology. This standard is under the jurisdiction of Shenyang Vacuum Technology Research Institute of the Ministry of Machinery Industry. This standard is drafted by Shenyang Vacuum Technology Research Institute. The main drafters of this standard are Zhang Yao, Wang Ziwen and Li Yuying.
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