A sealing structure of an automatic coupling device

Abstract

The invention discloses a sealing structure of an automatic coupling device. The sealing structure of the automatic coupling device comprises a coupling joint, a sealing structure, a pump outlet flange and a water outlet base flange; the coupling joint is connected with the pump outlet flange; and the coupling joint is provided with a sealing structure tightly matched with the water outlet base flange. The sealing structure comprises a sealing block, an upper lip part, a metal skeleton, a sealing cavity, an airbag, a sealing cavity inclined surface, a shell, a lower lip part and a bonding agent; the metal skeleton is arranged in the shell; the airbag is arranged in the sealing cavity; the upper lip part and the lower lip part of the shell are bonded with a sealing block through the bondingagent; and a pressure relief groove is formed in the sealing contact surface of the water outlet base flange with the coupling joint. Radial force generated by conveying of a medium in the cavity through a pump is used; the airbag in the structure is deformed by extrusion to generate pressing force on the sealing contact surface; and elastic energy stored by the sealing block is gradually released to achieve an axial compensation effect, so that the tightness of the contact surface can be greatly improved.

Description

technical field [0001] The invention relates to the field of mechanical engineering, in particular to a sealing structure of an automatic coupling device. Background technique [0002] At present, an automatic coupling device is often used between the submersible pump and the drainage base. The sealing method in the prior art is that the flange face directly faces the flange face, that is, the hard seal method, and some end face seals are also installed on the flange contact surface. ring, further improving the sealing. However, vibration problems will inevitably occur during the operation of the pump. In addition, the conveyed medium is mostly a solid-liquid mixture, which often leads to a decrease in the sealing performance of the contact surface, which leads to leakage accidents, reduces the pump efficiency, and affects its normal use. Contents of the invention [0003] In order to solve the above problems, the present invention relates to a sealing structure of an aut...

AI Technical Summary

Problems solved by technology

However, vibration problems will inevitably occur during the operation of the pump. In addition, the conveyed medium is mostly a solid-liquid mixture, which often leads to a decrease in the sealing performance of the contact surface, which leads to leakage accidents, reduces the pump efficiency, and affects its normal use.

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