Change-over switch interlocking device

A technology of locking device and sealing tube, applied in the direction of protection switch, emergency protection device, parts of protection switch, etc., can solve the problem of high cost, achieve the effect of low cost, avoid fire or electric shock, and simple structure

Inactive Publication Date: 2020-12-15
冯林英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem of high cost of the existing transfer switch interlock device, the present invention provides a transfer switch interlock device, the specific technical scheme of which is as follows:

Method used

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  • Change-over switch interlocking device
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  • Change-over switch interlocking device

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Embodiment Construction

[0020] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with its embodiments; it should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention. invention.

[0021] The present invention is a conversion switch interlocking device, and the following embodiments are described according to the drawings:

[0022] Such as figure 1 , figure 2 as well as image 3 As shown, a changeover switch interlocking device in an embodiment of the present invention includes a hollow sealing tube 1, a first piston 2 that is slidingly and sealingly connected to the inner walls of both ends of the sealing tube 1, and one end of each is respectively movably plugged in. The piston rod 3 fixedly connected to the first piston 2 in the end of the sealing tube 1, the sealin...

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Abstract

The invention provides a change-over switch interlocking device which comprises a hollow sealing pipe, a first piston, a piston rod and a volume-variable component arranged in the sealing pipe, the sealing pipe is filled with liquid, the volume-variable component comprises a shell, paraffin and a second piston, and the inner wall of the shell is provided with two cavities which are independent ofeach other and isolated from each other. One end of the cavity is closed, the other end of the cavity is open, the second piston is in sliding and sealing connection with the inner wall of the cavity,a sealed cavity is formed among the second piston, the cavity and the shell, the paraffin is filled in the sealed cavity, and the paraffin is configured to increase in size and drive the second piston to move towards the opening end of the cavity when the temperature is higher than a preset temperature threshold. The piston rod is driven by the driving liquid to move away from the opening end ofthe sealing pipe. The switch interlocking device is simple in structure and low in cost, the problem that the two circuit breakers of the change-over switch are switched on at the same time can be avoided, and the two circuit breakers of the change-over switch can be automatically switched off under the high-temperature condition.

Description

technical field [0001] The invention relates to the technical field of electrical switches, in particular to an interlocking device for a transfer switch. Background technique [0002] An interlock device is a mechanical device that is usually used to prevent two power sources (such as normal power and backup power) from being switched on at the same time in a dual power transfer switch. In the prior art, the interlocking device of the dual power transfer switch is mainly realized by interlocking the opening and tripping lever of the normal / standby power switch and the position of the main shaft of the standby / normal power switch, which is expensive and needs to be improved. Contents of the invention [0003] In order to overcome the problem of high cost of the existing transfer switch interlock device, the present invention provides a transfer switch interlock device, the specific technical scheme of which is as follows: [0004] An interlocking device for a changeover s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/10H01H71/18
CPCH01H71/1009H01H71/1045H01H71/18
Inventor 冯林英
Owner 冯林英
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