Inflation valve element, explosion-proof valve capable of detecting air tightness of box body through rapid inflation and detection method

Abstract

The invention discloses an inflation valve element. The inflation valve element comprises a fixing part, a compression spring, an inflation piston and a rubber seal, one end of the inflation piston isconnected to the fixing part through the compression spring, and the other end of the inflation piston is connected to the rubber seal. The inflation valve element is arranged on an explosion-proof valve, inflation is carried out from the inflation valve element, compared with a mode that inflation is carried out from an air-permeable membrane of the explosion-proof valve, the inflation valve element has the advantages that the air inlet speed is high, the used time is short, the detection efficiency is high, and in addition, the phenomena that the air-permeable membrane is damaged, and the explosion-proof valve is invalid can be avoided; and the air tightness detection inflation valve element and the explosion-proof valve are integrated into a whole, an inflation hole for air tightness detection does not need to be additionally formed in the sealed box body, after the detection is finished, the inflating piston is driven to automatically reset through the spring, the sealed state isrestored, a bolt does not need to be additionally arranged to seal the inflation hole, and therefore the risks that secondary seal is poor, and the protection grade requirement cannot be met can be avoided.

Description

technical field [0001] The invention relates to the technical field of explosion-proof valves, in particular to an explosion-proof valve with an inflatable valve core, a fast-inflating gas-inflated detection box body, and a detection method. Background technique [0002] Sealed boxes, such as outdoor electrical control boxes, energy storage battery boxes, electric vehicle battery packs, etc. are the "heart" of related equipment and new energy vehicles. As the core components of control and drive, they are safe, stable and reliable It directly affects the performance and safety of equipment or new energy electric vehicles. When water enters the controller box, the insulation performance decreases, causing short circuit and control system failure. Water entering the battery pack will cause short circuit of the battery, which will cause battery explosion. In order to prevent the performance of the battery pack in the battery pack or components in the electrical control box from...

AI Technical Summary

Problems solved by technology

According to the above standard method, the operation is complicated and takes a long time. After the test, the box is adhered to water and dust, which needs to be cleaned and dried. It is troublesome to deal with after the test. In order to meet the requirements of rapid detection, in the mass production process in the industry, the inflatable detection box is used to check whether the box is leaking to verify whether the box is well sealed to verify the protective effect of the box

Generally, the following methods are used: (1) Drill a threaded hole on the box body and connect it with an inflatable joint for detection. Although this method is fast for inflation detection, it needs to open an additional hole in the box body, which increases the difficulty of box body processing, and After the inflation test is qualified, a bolt is installed for secondary sealing, which cannot prove the secondary sealing effect of the bolt, and there is a risk that the secondary sealing of the inflation hole is poor and the protection level cannot be reached.

(2) Inflate the box through the breathable membrane of the explosion-proof balance valve, but the air permeability of the waterproof and breathable membrane is generally small, the inflation speed is very slow, and the detection efficiency is low, and if it is inflated with high pressure, the waterproof and breathable membrane will be damaged, resulting in Risk of explosion-proof valve failure

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