Electric power switch equivalent pressure vacuum pumping and inflating device and control method thereof

Abstract

The invention provides an electric power switch equivalent pressure vacuum pumping and inflating device which comprises a vacuum pump set, a buffer, a vacuum box, a high pressure nitrogen bottle set and a PLC controller. The vacuum pump set is connected to the buffer through a main vacuum pumping tube, the main vacuum pumping tube is provided with a first solenoid valve, the vacuum box is internally provided with a first power switch and a second power switch, the buffer is connected to the first power switch through a first vacuum tube, and the buffer is connected to the second power switch through a second vacuum tube. The vacuum box comprises a box body, a box door is arranged on the right side of the box body, the box door is slidingly connected to the right side surface of the box body, and the box body is further provided with a driving component for driving the box door to slide up and down along the right side surface of the box body. In conclusion, the equal pressure control of the internal and external pressure difference of the power switches during the vacuuming and nitrogen filling process is achieved, the damage to the power switches due to a pressure difference is prevented, the overall structural design is reasonable, the operation is convenient, and the production of a modern power switch is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of electric equipment, and in particular relates to an isobaric vacuuming and gas charging device for a power switch and a control method thereof. Background technique [0002] In the production process of the power switch, the power switch is sealed and assembled in the vacuum box, and the gas in the vacuum box and the power switch needs to be pumped out so that the air pressure in the vacuum box and the power switch reaches below 100Pa, and then the gas is pumped into the power switch and the vacuum box. Inflate 0.02MPa nitrogen and air respectively. In order to prevent deformation when the pressure difference between the inside and outside of the power switch is too large, resulting in changes in the position of the workpiece or damage to the power switch in severe cases, it is necessary to implement equal pressure control during the vacuuming and inflation process. [0003] At present, power switch manuf...

AI Technical Summary

Problems solved by technology

[0003] At present, power switch manufacturers generally use equal-pressure control devices, but the vacuum box door of this type of device is sealed by multiple bolt connections, and it is time-consuming and laborious to manually disassemble and assemble with pneumatic bolt tools for each vacuuming and inflation operation; The box is generally designed as a power switch station, and the work efficiency is low

The whole process operation procedure is cumbersome and the working cycle is long

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