Lead wire structure for sealing and explosion protection of shell

Abstract

The invention discloses a lead wire structure for sealing and explosion protection of a shell. The lead wire structure consists of an adapter plug (2) arranged on a lead wire hole (12) of a lead wire wall board (11) of the shell in a penetrated manner. The adapter plug (2) comprises an adapter plug body (21) made of insulation material, jacks (22) arranged at the both sides of the adapter plug main body (21) and matched with a cable joint (51) on a cable (5), and a metal pin (3) nested in the adapter plug main body (21); the metal pin (3) passes through the adapter plug body (21) in a sealed manner, and the both ends of the metal pin (3) respectively extend into the jacks (22) arranged at the both sides of the adapter plug body (21); and a sealing ring (4) is arranged between the adapter plug body (21) and a lead wire wall board (11). The lead wire structure provided by the invention not only has a good sealing effect but also is simple in operation of a lead wire, and is particularly suitable for the lead wire between a main tank body and a stand column body of an oiling machine.

Description

technical field [0001] The invention relates to a lead wire structure for passing through a lead wire on a wall plate, in particular to a lead wire structure requiring a sealing effect at the passing position. Background technique [0002] In the equipment and instruments with circuit boards, many circuit boards need to be placed in a sealed casing, and the circuit board is usually connected to other circuit boards outside the casing through cables, which requires the cables to pass through The structure passing through the housing wall (lead structure) must have a sealing effect. [0003] For example, in a side-operated fuel dispenser, the circuit board of the main control part is arranged in a closed main box in the middle of the body, and the circuit board side of the operating part is arranged in a column outside the main box. The main box and the column The cables between the circuit boards inside must pass through the box wall of the main box, and the threading part m...

AI Technical Summary

Problems solved by technology

However, in many cases, the cross-section of the cable is non-circular (special-shaped cross-section, such as a common flat cable), or even if the cross-section is circular, but its end is pre-set with a plug, so the existing cable sealing joint It will not work, and the sealing of the threading part becomes a technical difficulty

Usually the solution in the prior art is: set a soft material block (such as a rubber plate) on the box body wall, and cut a gap and a small hole in the middle of the soft material block, and the cable passes through the gap, and then add smear seal However, the sealing effect of this solution is not good, and in reality, there are cases of safety accidents in fuel dispensers due to poor sealing at this place.

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