Connecting structure for short joint and used for fuel cell system

Abstract

The invention discloses a connecting structure for a short joint and used for a fuel cell system, relates to the technical field of sealed connecting structures of vehicle fuel cell systems, and solves the problems of low fastening degree and poor durability in the prior art. The connecting structure comprises a first connector and a second connector, and further comprises a sealing connector, thesealing connector comprises an inner sleeve and an outer sleeve, a plug-in slot is formed between the inner sleeve and the outer sleeve, the first connector is in inserted connection within the innersleeve, the second connector is in inserted connection within the plug-in slot, and a locking piece is arranged on the outer side of the sealing connector. The connecting structure is reasonable in structure and reliable in connection, the two joints can be firmly connected, the fastening degree is high, the durability and the sealing performance are high, and the possible aging problem of glue after using of the glue is avoided.

Description

technical field [0001] The present invention relates to the technical field of the sealing connection structure of the vehicle fuel cell system, more specifically, it relates to a connection structure for short joints in the fuel cell system. Background technique [0002] The fuel cell system engine is a vehicle power system for new energy vehicles. The fuel cell system engine uses the electrochemical reaction of fuel hydrogen and oxidant to output energy to the outside. The fuel cell system can be divided into a hydrogen subsystem, an air subsystem, and a cooling water subsystem. Among them, the flowing media in the hydrogen subsystem and the air subsystem are gaseous hydrogen and oxygen respectively, so the sealing and connection reliability of the pipeline are very important. Due to the limitation of the layout space inside the car or the design of the parts, the connecting pipes are usually connected with short joints, that is, joints with a length less than 20mm. [...

AI Technical Summary

Problems solved by technology

However, it often occurs that the length of the hose or hard tube inserted into the joint is too short, resulting in a low degree of connection tightness

During use, it is easily affected by mechanical vibration, which may easily cause local air leakage.

In addition, the use of glue-assisted methods does not have high durability

The main reason is that the temperature of the air subsystem in the fuel cell system is about 80 degrees, and the joints used for a long time at this temperature are likely to cause the glue to age and cause air leakage or disconnection at the connection

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