Anti-explosion main junction box for high-voltage compact motor

Abstract

The invention discloses an anti-explosion main junction box for a high-voltage compact motor, comprising a box base and a box cover. The box base is detachably and hermetically connected with a motor body; the box cover is detachably and hermetically connected with the box base; a junction post is arranged in the box base; a pressure release hole is arranged on the lower part of the box base; the box base is provided with a hollow pressing plate inside the pressure release hole; two layers of hollow sealing cushions are arranged between the pressing plate and the box base; a layer of pressure release film is arranged between the two layers of sealing cushions; and the box base is provided with a protection cover having an opening outside the pressure release hole. With simple structure, easy installation manufacture and novel valving design, compared with the traditional junction box, the invention greatly improves the security and has the characteristics of reasonable electric gap, creepage distance and shell intensity, more convenient installation and use, high reliability, convenient use, compact structure and attractive appearance.

Description

technical field [0001] The invention relates to a protection device for electric wires and cables, in particular to an explosion-proof main junction box for a high-voltage compact motor. Background technique [0002] The junction box used in the existing high-voltage compact motors is composed of a box seat and a box cover welded by thin steel plates. It has the following defects: 1. The junction box is a closed shell. When an accidental explosion occurs in the junction box The energy cannot be transmitted, which will cause damage to the junction box and affect the personal safety of the surrounding staff; 2. There is an insulating gasket between the box seat and the box cover of the junction box, the box seat and the main body of the motor. During operation, There may be a certain potential difference between the box base and the box cover, which is prone to partial discharge and affects the safety of the junction box; 3. There is a junction box bucket at the outlet of the ...

AI Technical Summary

Problems solved by technology

[0002] The junction box used in the existing high-voltage compact motors is composed of a box seat and a box cover welded by thin steel plates. It has the following defects: 1. The junction box is a closed shell. When an accidental explosion occurs in the junction box The energy cannot be transmitted, which will cause damage to the junction box and affect the personal safety of the surrounding staff; 2. There is an insulating gasket between the box seat and the box cover of the junction box, the box seat and the main body of the motor. During operation, There may be a certain potential difference between the box base and the box cover, which is prone to partial discharge and affects the safety of the junction box; 3. There is a junction box bucket at the outlet of the junction box, which is complex in structure, inconvenient to install and sealed The performance is unreliable; 4. The bottom surface of the box body and the matching surface of the corresponding motor body are both processed on a plane, and then directly matched or a layer of gasket is added in the middle to meet the protection performance. Not only the process is complicated, but also the sealing performance is not good

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