Equipment for small scale booster test

Abstract

The invention relates to a device for small scale booster test. The device is used to test the explosion-proof parameters of the explosion-proof equipments, in particular booster tests with a volume of less than 20 cubic centimetres. The device comprises a metallic external test chamber, in which an independent internal test chamber is set. The metallic external chamber and the internal chamber share a chassis and are externally interconnected with a stop valve. The internal test chamber cover is arranged in the external test chamber, connected by a screw thread. The internal and external test chambers are interconnected with metallic sintered breathing apparatus. By repetitive booster experiments with all kinds of gas mixture, the device for small scale booster test can further calculate the explosion-proof parameters at smaller volume so as to complete the national standards.

Description

technical field [0001] The invention relates to an explosion transmission test device, in particular to a flameproof small explosion transmission test device with a volume of less than 20 cubic centimeters. Background technique [0002] In order to detect the safety of various equipment working in explosive environments, for some equipment working in inflammable and explosive environments, these equipment are required to have good and reliable explosion-proof performance. Explosion-proof equipment is based on explosion-proof standards. There are many kinds of characteristics. Among them, the explosion-proof explosion-proof equipment is protected against explosion by wrapping a closed cavity outside the explosion-proof equipment, and isolating the explosion caused inside it from the external flammable environment through this cavity. In order to test the reliability of the airtight cavity used in these explosion-proof products, various explosion-transfer test devices are used...

AI Technical Summary

Problems solved by technology

[0002] In order to detect the safety of various equipment working in explosive environments, for some equipment working in inflammable and explosive environments, these equipment are required to have good and reliable explosion-proof performance. Explosion-proof equipment is based on explosion-proof standards. There are many kinds of characteristics. Among them, the explosion-proof explosion-proof equipment is protected against explosion by wrapping a closed cavity outside the explosion-proof equipment, and isolating the explosion caused inside it from the external flammable environment through this cavity. In order to test the reliability of the airtight cavity used in these explosion-proof products, various explosion-transfer test devices are used for explosion-proof testing. The volume of the detection chamber of different explosion-proof test devices has a certain impact on the test results. Currently, common Explosive gas mixtures are used in the experiments of the explosion transmission test device. Usually, the detection of explosive gas mixtures requires the sensor to be in contact with the dangerous gas, and the energy in the internal circuit cannot be transmitted to the external environment. The volume of the gas detection chamber of the explosion test device is relatively small. The most common is to use two kinds of limiter burners, metal powder metallurgy sintered type and metal sintered type. The gas reaches the sensor through the limiter, and the explosion energy generated in the detection room can be controlled so as not to ignite the external environment. For the metal powder metallurgy sintered or metal mesh sintered limiter, its thickness and porosity are critical to the sensor. Reducing the thickness and increasing the porosity can effectively improve the response time of the sensor, but it is also prone to explosion. In practical applications, how to choose the explosion-proof parameters for the sensor test room with a small volume is very important. especially important

[0003] At present, the minimum volume of explosion-proof test parameters of known explosion-proof enclosures is 100 cubic centimeters (national standard GB3836.2, IEC60079-1). For explosive environments with a volume less than 100 cubic centimeters, the common Two parameters: "maximum safety gap" and "explosion-proof joint width", etc., are usually tested according to the parameters of a volume of 100 cubic centimeters, and in theory, for a flameproof explosion-proof enclosure with a volume of less than 20 cubic centimeters, Its "maximum safety gap" and "explosion-proof joint surface width" should be lower than the "maximum safety gap" and "explosion-proof joint surface width" with a volume of 100 cubic centimeters, but in practical applications, limited to the conditions of the test equipment, the volume is less than 20 The "maximum safety gap" and "explosion-proof joint width" of a cubic centimeter flameproof explosion-proof enclosure are often not well determined

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