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A vacuum switch tube

A vacuum switch tube and vacuum technology, applied in electrical switches, high-voltage/high-current switches, high-voltage air circuit breakers, etc., can solve the problems of difficult to increase arc voltage, no obvious increase in voltage, increased cost and floor space, etc. Achieve the effect of high withstand voltage capability and high arc resistance

Active Publication Date: 2018-01-09
BEIJING BOE VACUUM ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing vacuum switch tubes have the following defects: firstly, the existing vacuum switch tubes can only provide one vacuum break, and the withstand voltage capability of the vacuum break does not increase linearly with the increase of the break distance. After the spacing is increased to a certain extent, the voltage withstand of a single vacuum fracture will not increase significantly
Therefore, if the system has a high recovery voltage or is used in high-voltage applications, the existing vacuum switch tubes cannot meet the application requirements, and two vacuum switch tubes may need to be connected in series to meet the needs, which will increase the cost and floor space
Secondly, the single vacuum fracture arc voltage of the existing vacuum switching tube is difficult to increase, which is only about 20V, so it cannot meet the application of high arc voltage occasions, such as the application on the current transfer type DC switch

Method used

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  • A vacuum switch tube
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Examples

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Embodiment 1

[0025] This embodiment provides a vacuum switch tube, including an insulating casing, and a first conductive rod 1 and a second conductive rod 2 connected to both ends of the insulating casing and partially placed in the insulating casing. In this embodiment, the first conductive rod 1 is set as a moving conductive rod, which is connected to the operating mechanism of the vacuum switch, and the second conductive rod 2 is set as a static conductive rod, which is fixed on the insulating shell.

[0026] At least one third conductive rod 3 is also provided between the first conductive rod 1 and the second conductive rod 2, the third conductive rod 3 is preferably arranged in the middle of the insulating shell, the two ends of the third conductive rod 3 and One end of the first conductive rod 1 and the second conductive rod 2 placed in the insulating shell is fixedly connected with a contact 4 by brazing, and each adjacent two contacts 4 are in a vacuum state, and each adjacent two ...

Embodiment 2

[0042] The difference between this embodiment and Embodiment 1 is that the structure and installation method of the return spring 51 are different, and the rest of the structure is the same as that of Embodiment 2, and will not be repeated here. Only the structure and installation method of the spring 51 of this embodiment will be described below. illustrate:

[0043] Such as image 3 as well as Figure 4 As shown, the return spring 51 of this embodiment is sleeved on the third conductive rod 3. Specifically, the return spring 51 is placed between the top wall of the support 52 and the clamping plate 31 of the third conductive rod 3, and then When the third conductive rod 3 moved to the second conductive rod 2, the return spring 51 moved with the third conductive rod 3 under the drive of the clamp 31. At this time, due to the limit of the top wall of the support 52, the return spring 51 was moved compression.

[0044] The return spring 51 in this embodiment can be directly ...

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Abstract

The invention discloses a vacuum switch tube. The vacuum switch tube comprises an insulation shell, a first conductive rod and a second conductive rod and also comprises at least one third conductive rod, wherein the first conductive rod and the second conductive rod are connected to the two ends of the insulation shell and partially arranged in the insulation shell, the third conductive rod is arranged between the first conductive rod and the second conductive rod, contacts are arranged at the two ends of the third conductive rod, at one end, placed in the insulation shell, of the first conductive rod, and at one end, placed in the insulation shell, of the second conductive rod, and a vacuum opening is formed between each two adjacent contacts; and each of the third conductive rods is connected with a reset mechanism, and the reset mechanism is fixedly connected to the insulation shell and used for reset after moving the third conductive rod. By arranging a plurality of vacuum openings connected in series in the insulation shell of the vacuum switch tube, the vacuum switch tube is endowed with high voltage resistant ability and high arc resistance in a switch-off state, and thus, the application of a high-arc voltage occasion for switching a capacitor bank, a high-voltage and -current transfer type DC switch can be satisfied better.

Description

technical field [0001] The invention relates to a vacuum switch tube, in particular to a vacuum switch tube with double breaks inside, which has higher withstand voltage and can generate higher arc voltage. Background technique [0002] In the distribution network, the switchgear that plays a control or protection function is an important device that must be applied in the circuit, and it plays the role of closing and breaking the circuit. In recent years, due to the obvious advantages of the vacuum switch (strong breaking capacity, environmental protection and no explosion hazard, small contact gap, extremely high electrical life, etc.), it has occupied an overwhelming position in the application of the medium voltage field. [0003] The core component of the vacuum switch is the vacuum switch tube in its housing. There are two contacts inside the conventional vacuum switch tube, and the front and rear ends are respectively connected to the moving conductive rod and the st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/662
CPCH01H33/66207H01H33/66261
Inventor 刘宝华刘卫荣
Owner BEIJING BOE VACUUM ELECTRONICS CO LTD
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