This standard specifies the technical requirements, test methods, inspection rules, marking, packaging and storage of explosion-proof valve electric devices (hereinafter referred to as explosion-proof electric devices). This standard is applicable to the design, manufacture and inspection of electric devices with explosion-proof type d, category II, explosive gas mixtures of level A, B, C, and the maximum allowable surface temperature of T4 to T6. JB/T 8529-1997 Technical conditions for explosion-proof valve electric devices JB/T8529-1997 Standard download decompression password: www.bzxz.net

JB/T8529
This standard is proposed and managed by the National Valve Standardization Technical Committee. Drafting unit of this standard: Tianjin Second General Machinery Factory
Main drafters of this standard: Kou Guoqing, Liu Qichang, Cheng Rujing, Yan Zhongming, Zhao Guangyuan1Scope
Standards of the Machinery Industry of the People's Republic of China
Technical conditions for explosion-proof valve electric devices
IB/T85291997
This standard specifies the technical requirements, test methods, inspection conditions, marking, packaging and storage of explosion-proof valve electric devices (hereinafter referred to as explosion-proof electric devices).
This standard is applicable to the design, manufacture and inspection of electric devices with explosion-proof type d, category I, explosive gas mixture A, BC level 1 + maximum allowable surface temperature T1~T62Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. The versions shown are valid at the time of publication of this standard. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards G1B/T2423.4-1993 Basic environmental test procedures for electrical and electronic products Test I) b: Alternating damp heat test method GB3836.1-1993 General requirements for explosion-proof electrical equipment for explosive atmospheres GB3836.2-1993 Explosion-proof electrical equipment for explosive atmospheres Flameproof electrical equipment \d" GB/T4942.2-1993 Protection grade of low-voltage electrical enclosures JB219677YBDF-WF series Guangdong, corrosion-resistant, flameproof electric valves with 3-phase asynchronous motors JB/T8528-1997 Technical conditions for ordinary valve electric devices 3 Technical requirements
3.1 Flameproof electric devices should comply with 3.2 Flameproof enclosures are allowed to use gray cast iron or light alloys not less than HT200. When light alloy enclosures are used, the tensile strength of the material shall be not less than 120MPa and the magnesium content shall not be greater than 0.5% (by weight). 3.3 Flameproof enclosures and enclosure components shall be subjected to a water pressure test at a pressure of 1.0MPa for 1min. There shall be no continuous dripping. 3.4 Transparent parts shall comply with the provisions of Chapter 9 of GB3836.283. 3.5 Rubber parts with explosion-proof requirements shall comply with the provisions of 14.2.5 of GB3836.1-83. 3.6 The motors used in flameproof electric devices shall comply with the provisions of JB2196 or relevant special motor standards. 3.7 Flameproof enclosures shall be used for flameproof and electric devices. The materials and structures of the fasteners used in the explosion-proof enclosure shall comply with the provisions of Chapter 9 of GB3836.1-83 and Chapter 11 of GB3836.2-83.
3.8 The structural parameters of the explosion-proof joint surface shall comply with the relevant provisions of Chapter 6 of GB3836.2-83. 3.9 The observation window on the explosion-proof enclosure shall comply with the provisions of 9.3 of GB3836.2--83. 3.10 When the explosion-proof enclosure components use O-rings or gaskets as sealing measures, there should be explosion-proof joint surfaces that comply with the provisions of 3.8 outside the O-rings and sealants.
3.11 The explosion-proof surfaces of the explosion-proof parts should be promptly coated with anti-rust oil or treated with other anti-rust measures after processing, and shall not be exposed to sulfur during storage and transportation.
3.12 Flameproof electrical The actuator shall have connectors for connecting cables or wires. If the cable is permanently introduced, connectors may not be provided. wwW.bzxz.Net
Approved by the Ministry of Machinery Industry of the People's Republic of China on April 15, 1997526
Implementation on January 1, 1998
JB/T85291997
3.13 The structure and size design of the junction box shall be convenient for the connection of wires and cables. The electrical clearance in the junction box shall not be less than 8mm. The electrical clearance shall not be less than 10mm.
3.14 The inner wall of the junction box and the inner wall of the metal shell where sparks may be generated shall be evenly coated with arc-resistant magnetic paint. 3.15 The junction box seat cavity and the main cavity shall adopt a flameproof structure. The structural parameters of the flameproof joint surface shall be determined according to the net volume of the large cavity. 3.16 The structure of the lead-in device for wires and cables shall comply with the provisions of 11.2 in GB3836.183. 3.17 A warning sign with the words "Open the cover after power off" should be installed on the cover of the electrical box. 3.18 Space heaters are allowed to be used for flameproof electric devices. Their selection and installation should comply with the new provisions of (B3836.1-83, Chapter 2C:
3.19 The grounding and wiring of flameproof electric devices should comply with (B3836.1--83, Chapter 15 and Chapter 16). When flameproof electric devices are subjected to (B3836.2-83, Chapter 19 and Chapter 20, all flameproof parts should not be damaged. 3.20
3.21 The maximum surface temperature at any point of the flameproof electric device housing should be lower than 135 (. 3.22 The protection level of flameproof electric devices should not be lower than GB/T4942.2 Regulations: 3.23 The moisture and heat resistance of flameproof electric devices shall comply with the requirements of GB/T2423.493 for 12 cycles of alternating moisture and heat tests at a severity level of 40C. The insulation resistance of the moisture and heat test shop shall not be less than 1M2, and it shall be able to withstand the voltage withstand test specified in 4.18 of JB/T8528-1997 without breakdown, and the flameproof surface of the sample shall not be corroded. 4 Test method
Hydropressure test of flameproof enclosure
The test method shall be in accordance with the provisions of Appendix A of G133836.2-83. 4.2 Impact test of transparent parts
The test method shall be in accordance with the provisions of 21.1 of GB3836.1-83. 4.3 Aging test of rubber parts| |tt||Test method shall be in accordance with the provisions of Chapter 29 of GB3836.1-83. 4.4 Test of introduction device
Test method shall be in accordance with the provisions of 21.1 of GB3836.2--83. 4.5 Strength test
Test method shall be in accordance with the provisions of Chapter 19 of GB3836.2-83 4.6 Flameproof performance test
Test method shall be in accordance with the provisions of Chapter 20 of GB3836.2-83. 4.7 Determination of maximum surface temperature
Test method shall be in accordance with the provisions of 24.1 of GB3836.1·83. 4.8 Protection performance test
Test force method shall be in accordance with the provisions of GB3/4912.2. 4.9 Wet heat test Test
Test force method shall be in accordance with the provisions of (13/T2423.4. Other flameproof electric devices with the same structure, material and working capacity as the flameproof electric devices that have passed the wet heat test do not need to undergo this test. 5 Inspection rules
5.1 Before the production of flameproof electric devices, the provisions of Chapter 31 of (133836.1·83) shall be followed. 5.2 Factory inspection
5.2.1 Each flameproof electric device shall be subject to factory inspection. 5.2.2 In addition to the provisions of 6.1 in J13/T8528-1997, the items and technical requirements of the factory inspection shall also comply with the provisions of Table 1. 5.3 Random inspection
JB/T 8529 - 1997
The items and technical requirements for random inspection of flameproof electric devices shall comply with the provisions of 6.2 of JB/T85281997 and the provisions of Table 1.
5.4 Type inspection
The items and technical requirements for type inspection of flameproof electric devices shall comply with the provisions of 6.3 of JB/T85281997 and the provisions of Table 1.
Inspection items
Flameproof joint surface
Grounding and wiring
Shell water pressure test
Transparent parts impact test
Rubber parts aging test
Pupil device test
Strength test
Wheel explosion performance test
Determination of maximum surface temperature
Protection performance test
Wet heat test
Marking, packaging and storage
6.1 Marking
Factory inspection
Inspection rules
Spot inspection
Type inspection
A clear and permanent embossed mark "Ex" should be set on the obvious part of the shell of the flameproof electric device. Technical requirements
Should comply with the provisions of 3.8 or more
Should comply with the provisions of 3.19
Should comply with the provisions of 3.3 or more
Should comply with the provisions of 3.1
Should comply with the provisions of 3.5
Should comply with the provisions of 3.16
Should comply with the provisions of 3.20
Should comply with the provisions of 3.20
Should comply with the provisions of 3.21
Should comply with the provisions of 3.22
Should comply with the provisions of 3.23
6.1.2 All warning plates and nameplates shall be made of stainless steel or brass, and the thickness shall not be less than 1.0mm. 6.1.3 The data on the nameplate shall be engraved in a manner that ensures that the writing will not be lost during the entire service life of the flameproof electric device. 6.1.4 The nameplate should be fixed in a conspicuous place on the main box of the flameproof electric device. In addition to complying with the provisions of 7.1.2 of BT8528.-1997, the following contents should be noted:
a) There is a clear mark "Ex" on the right side of the nameplate: b) Explosion-proof mark, and the explosion-proof type, category, level and temperature group are marked in sequence; c) Explosion-proof certificate number;
d) Technical condition number.
6.2 Packaging
The packaging of flameproof electric devices shall comply with the provisions of 7.2 of JB/T8528-1997. 6.3 Storage
The storage of flameproof electric devices shall comply with the provisions of 7.3 of JB/T8528-1997. 528
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