Leak-proof cable connection sealing device

Abstract

The invention discloses a leakproof sealing device for cable connection, which comprises a cable line and a terminal box cover. The invention is characterized in that the cable line has three synchronous sealing in different positions that are the sealing between a rubber insulation layer on the external surface of the cable line and a contacting piece, the clearance sealing between an inner corewire of the rubber insulation layer and a core wire, and the surface sealing of solid copper post head; compared with prior art, the leakproof sealing device for cable connection of the invention hasthe sealing principle in the three positions that a rubber sealing part which has elastic deformation is squeezed and therefore deformed under the exogenic action so as to enable the rubber sealing part to adhere closely with contacted objects, thus serving the sealing purpose.

Description

technical field [0001] The invention relates to a sealing device, in particular to a cable connection sealing device used on a submersible pump with three water-proof leaks. Background technique [0002] The submersible electric pump is a small drainage and irrigation machine designed with the pump and the motor as a whole. It is submerged underwater during operation. Therefore, the interface between the lead wire in the motor and the external power cable needs to be sealed. Once the seal is not good, water will enter the motor. , causing the motor to short circuit and burn the motor. Therefore, the cable has the problem of external leakage and internal leakage. External leakage-that is, the leakage between the rubber insulation layer on the outer surface of the cable and the contact piece, internal leakage-that is, the gap leakage between the inner core wire and the core wire of the rubber insulation layer and The gap between the copper wire and the copper wire in the core...

AI Technical Summary

Problems solved by technology

[0003] 1. Once the insulation layer on the outer surface of the cable is scratched or broken, water will enter the cable from the break and flow into the motor along the gap between the core wires;

[0004] 2. Some users add cables by themselves, but the sealing package at the joints is generally not handled well, and once the joints enter the water, the situation described in Article 1 will appear;

[0005] 3. When the electric pump is working, the motor will generate heat, which will increase the temperature inside the motor. When the electric pump is working in an environment with high humidity, due to the principle of thermal expansion and contraction, it will continuously suck humid air from the inside of the cable into the air. In the motor, the water vapor in the humid air is liquefied and deposited in the motor. The longer the time, the more water will be deposited. In the light case, the insulation performance of the motor will decrease and the leakage is unsafe. In the severe case, it will cause a short circuit in the inner coil of the motor and burn out the motor

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