KR101512328B1

KR101512328B1 - Impact absorber for vacuum interrupter of high-voltage shut-off device

Info

Publication number: KR101512328B1
Application number: KR20140154709A
Authority: KR
Inventors: 박덕문
Original assignee: 박덕문
Priority date: 2014-11-07
Filing date: 2014-11-07
Publication date: 2015-04-15

Abstract

The present invention relates to an impact absorber for a vacuum interrupter of high voltage shut-off device. More particularly, when a high voltage power equipment experiences excessive current and excessive voltage, and causes a vacuum valve for carrying out a shut-down function to open, operating electrode bouncing is minimized, thereby improving vacuum valve operation. Especially, an impact from opening the operation electrode can be minimized; a structurally simplified, compact type can be manufactured; its size and shape can be freely changed depending on a purpose and operation load; and a push method and a pull method can be employed depending on how a force for opening the valve is supplied. Accordingly, reliability and competitiveness can be improved in the impact absorber field, particularly the high voltage shut-off device field and the vacuum interrupter field, and other similar or related fields.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a shock absorber for a vacuum circuit breaker,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a shock absorber for a vacuum circuit breaker of a high voltage interrupter, and more particularly to a shock absorber for a vacuum interrupter of a high voltage interrupter, So that the operating characteristics of the vacuum circuit breaker can be improved.

Particularly, the present invention can maximize the reduction effect on the impact force generated in the opening operation of the movable electrode, and can be manufactured in a compact type in which the structure is simplified, The present invention relates to a shock absorber for a vacuum circuit breaker for a high-voltage circuit breaker which can be easily applied to various high voltage circuit breakers and vacuum breakers by making it possible to freely change the size and shape of the circuit breaker.

2. Description of the Related Art Recently, there has been a demand for a technology that can maintain a good breaking performance even when using for a long period of time due to an improvement in service life of electric power devices. Therefore, electric devices (e.g., switches or breakers) using a vacuum interrupter Has been increasing.

For example, Korean Patent Registration No. 10-1191331 'Vacuum circuit breaker' (hereinafter referred to as 'Prior Art'), which is a prior art document described below, plays a role of protecting loads and devices from overcurrent and overvoltage, And the movable electrode is separated from the fixed electrode to block the overcurrent and the overvoltage.

As can be seen from the prior art, a vacuum circuit breaker used in a high-voltage power device can arc in an over-current and an over-voltage shutdown in a vacuum container, and is widely used in a substation or a power distribution facility.

Such a vacuum circuit breaker has a high weighting importance in a high voltage power device and requires a high reliability. In order to minimize damage to persons or damage to property due to burnout of a line or failure of a device, Is required as a prerequisite.

On the other hand, in a vacuum circuit breaker used in a high-voltage power device, the movable electrode is brought into contact with the fixed electrode by a very large contact pressure due to the characteristics of the power device. For this reason, the movable electrode of the vacuum circuit breaker has a considerably large force As shown in FIG.

As a result, a phenomenon (bounce phenomenon) in which the movable electrode protrudes due to the recoil by the opening operation force immediately after the vacuum interrupter is opened (bounce phenomenon) occurs, which may cause a problem that the cutoff voltage is applied again.

Korean Patent Publication No. 10-1191331 'Vacuum Circuit Breaker'

In order to solve the above-mentioned problems, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to minimize the bounce of the movable electrode due to the opening operation force generated in the opening operation of the vacuum circuit breaker used in high- It is an object of the present invention to provide a shock absorber for a vacuum circuit breaker of a high voltage circuit breaker.

Particularly, the present invention can maximize the reduction effect on the impact force generated in the opening operation of the movable electrode, and can be manufactured in a compact type in which the structure is simplified, And to provide a shock absorber for a vacuum circuit breaker of a high voltage cut-off device, which can be manufactured by freely changing the size, shape, and the like.
In addition, the present invention can easily combine and separate components without using any separate equipment, and therefore it is very easy to maintain maintenance by long-term use, such as replenishing oil or replacing worn components during use And a shock absorber for a vacuum interrupter of a high voltage interrupter.

In addition, according to the present invention, it is possible to apply a push method and a pull method according to a method of applying an opening operation force, thereby making it possible to easily apply a high voltage interrupter and a vacuum interrupter to various high voltage interrupters and vacuum interrupters, It is an object of the present invention to provide a shock absorber for a vacuum circuit breaker of a device.

In order to accomplish the above object, a shock absorber for a vacuum circuit breaker of a high voltage breaking device according to the present invention comprises: a housing formed with a multi-stage space portion including an oil filling hole through which oil is filled, A shaft formed at a central portion of the housing, the housing having at least one oil passage hole formed therethrough, the shaft being axially coupled to the multi-space space of the housing such that the piston is slidably moved in the oil filling hole; A resilient restoring member for restoring the piston to the original position; And a bush installed in the multi-stage space portion to limit a movement distance of the piston, wherein the multi-stage space portion includes a shaft through hole through which one side of the shaft passes; And a bush coupling hole in which the bush is formed, wherein the shaft through hole, the oil filling hole, and the bush coupling hole are sequentially connected in a multi-step manner so as to be sequentially widened from one side to the other side, A support hole is further formed in the other direction of the coupling hole, and a retainer for preventing the release of the bush is detachably coupled to the support hole.

The shaft is divided into an upper shaft and a lower shaft with the piston as a center. The piston moves in the direction of the central axis from the inside of the oil filling hole, The shaft and the lower shaft may have the same volume.

In addition, the oil transfer hole is formed such that the oil stored in the oil filling hole moves to one side or the other side in the process of the piston moving in the center axial direction within the oil filling hole, and the shape and size May be formed corresponding to the set oil shift amount determined based on at least one of the magnitude of the opening operation force applied to the shaft from the vacuum valve and the set shock absorption force.

The oil transfer holes are formed in at least one pair such that the shape and size are symmetrical with respect to the central axis of the shaft, and the sum of the oil transfer amounts passing through the pair of oil transfer holes corresponds to the set oil transfer amount .

The shaft may pass through the housing in one direction about the piston, and through the bush in the other direction.

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In addition, the shaft may be configured such that both end portions thereof protrude to the outside of the housing.

According to the present invention, it is possible to minimize the bounce of the movable electrode due to the opening operation force generated during the opening operation of the vacuum circuit breaker used in the high voltage power device, and to improve the operation characteristics of the vacuum circuit breaker .

Further, since the present invention can be manufactured in a compact type in which the structure of the shock absorber is simplified, it is advantageous that the present invention can be used not only in a large-size power device but also in a small-sized power device.

Thus, when designing a power device for performing a specific function, it is possible to minimize restrictions on each configuration and greatly improve the degree of freedom of design.

In addition, the shock absorber of the present invention can be applied to a push system or a pull system depending on a method of applying an opening operation force of a vacuum circuit breaker, There is an advantage that it can be easily applied to power devices having various structures, such as being simply coupled to power devices.

Since the voltage and the cut-off load vary depending on the rating of the vacuum circuit breaker, the present invention can variously change the length and shape of the shaft, the number and the size of the oil transfer holes of the piston according to the operation load of the circuit breaker, It is possible to exert various performance characteristics depending on the application.

Further, the present invention is advantageous in that it is possible to replenish oil or replace worn components during use by allowing the respective components to be combined with each other in a fitting manner, thereby making it easy to perform maintenance for a long period of use .

Accordingly, it is possible to improve the reliability and competitiveness in the field of using the shock absorber, particularly in the field of high-voltage interrupters and vacuum breakers used therein, as well as in similar or related fields.

1 is a partial cutaway perspective view showing an embodiment of a shock absorber for a vacuum circuit breaker of a high voltage cut-off device according to the present invention.
2 is an exploded perspective view of FIG.
3 is a partially cutaway perspective view of the housing shown in Fig.
4 is a view showing the embodiments of the shaft shown in Fig.
5 is an exploded perspective view of the bush shown in Fig.
Figs. 6 to 8 are views for explaining the operation of Fig.
9 is a perspective view showing another embodiment of a shock absorber for a vacuum circuit breaker of a high-voltage breaking device according to the present invention.
Fig. 10 is a use state diagram of Fig. 9. Fig.

An example of a shock absorber for a vacuum circuit breaker of a high-voltage interrupter according to the present invention can be variously applied, and a most preferred embodiment will be described below with reference to the accompanying drawings.

1 is an exploded perspective view of a shock absorber according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of FIG. 1. FIG. 3 is a partially cutaway perspective view of the housing shown in FIG. to be.

1, a shock absorber A for a vacuum circuit breaker used in a high voltage circuit breaker includes a housing 100, a shaft 200, a resilient elastic member 300, and a bush 400 .

3, the housing 100 is formed by passing a multi-stage space portion 110 including an oil filling hole 111 through which the oil is filled, along the center axis CA.

3, the multi-stage space portion 110 is formed so that the shaft through hole 112, the oil filling hole 111, and the bushing hole 113 extend in one direction (the lower direction in FIG. 3) The upper end of the bushing hole 113 may be formed in a stepped manner so as to be widened in a sequential manner.

The shaft 200 is axially coupled to the multi-stage space portion 110 of the housing 100 as shown in FIG. 1, and a piston 210 is formed at a center portion thereof as shown in FIG. 2, The upper shaft 220 and the lower shaft 230 may be formed at the upper and lower portions, respectively.

The piston 210 is formed with at least one oil transfer hole 211 so as to pass through the upper and lower portions thereof and is coupled to the oil filling hole 111 of the multi- do.

The lower shaft 230 formed on one side of the shaft 200 is coupled to penetrate through the shaft through hole 112 of the multi-stage space portion 110 and is exposed to the lower portion of the housing 100. The upper shaft 220 Is configured to be exposed through the center of the bushing 400 to the upper portion of the housing 100 as shown in Figs.

The restoring elastic member 300 presses the piston 210, which is moved in the up-and-down direction in the oil filling hole 111, to the original position. As shown in FIG. 1, the lower portion of the shaft- And the lower portion of the piston 210 to press the piston 210 upward. It goes without saying that the restoring elastic member 300 may be configured to be disposed between the upper portion of the piston 210 and the lower portion of the bushing 400 so as to press the piston 210 in the downward direction. For example, the resilient elastic member 300 may be composed of an elastic spring as shown in Figs.

The bushing 400 is inserted into the bushing hole 113 of the multi-stage space portion 110 and is engaged with the bushing hole 113 to restrict the movement distance of the piston 210 in the upward direction. At the same time, the bushing 400 can prevent the shaft 200 from being separated from the upper portion of the housing 100 due to the elastic force of the elastic member 300 for restoration.

Accordingly, the piston 210 of the shaft 200 can reciprocate from the lower surface of the oil filling hole 111 to the lower surface of the bush 400.

In addition, the shock absorber A according to the present invention may further include a support 500, which is fitted to and coupled to the retaining hole 114 of the multi-stage space portion 110.

The support 500 is provided to prevent the bush 400 from being separated from the upper portion of the housing 100 and may be constituted by a 'C' ring as shown in FIG.

The shock absorber A according to the present invention has a structure in which the upper and lower portions of the shaft 200 are coupled with the upper and lower portions of the housing 100 so as to protrude therefrom, It can be moved in the vertical direction within a certain distance by the opening operation force applied by the movable electrode and the elastic force of the elastic member 300 for restoration.

When the inner space of the oil filling hole 111 through which the piston 210 of the shaft 200 moves is an empty space due to the opening force or the elastic force generated by the resilient elastic member 300, An impact may be generated in the lower surface of the oil filling hole 111, the lower surface of the oil filling hole 111, the upper surface of the piston 210 and the lower surface of the bushing 400. Such an impact force is transmitted to the movable electrode of the vacuum circuit breaker, The adverse effect of increasing the bounce amount can be obtained.

In order to prevent this, in the present invention, oil which functions as a buffer can be stored in the oil filling hole 111.

It is therefore necessary that the oil stored in the lower part of the oil filling hole 111 moves to the upper part of the oil filling hole 111 during the movement of the piston 210. For this purpose, At least one oil transfer hole 211 is formed.

At this time, depending on the number and size of the oil transfer holes 211, the amount of the oil moving to the upper and lower portions of the oil filling hole 111 can be varied. Depending on the amount of movement of the oil, The extent to which the shock is absorbed can vary.

Hereinafter, a more detailed description will be given with reference to FIG.

4 is a view showing the embodiments of the shaft shown in Fig.

The oil transfer hole 211 formed in the piston 210 of the shaft 200 is moved in the direction of the center axis CA in the oil filling hole 111 as described above , And the oil stored in the oil filling hole 111 is moved to one side or the other side.

Further, at least one of the shape and the size of the oil transfer hole 211 can be determined according to the set oil shift amount determined based on the high-voltage power device and the vacuum valve in which the shock absorber A according to the present invention is used. Here, the set oil shift amount may be determined based on at least one of the magnitude of the opening operation force applied to the shaft 200 from the vacuum valve and the set shock absorption force.

In the case where only one oil transfer hole 211 is formed in the piston 210, the shaft 200 is inclined due to a difference in resistance between a portion where the oil moves and a portion where the oil can not move in the process of moving the piston 210, The piston 210 and the shaft 200 may not be smoothly operated.

Accordingly, it is preferable that the oil transfer holes 211 of the present invention are formed in at least one pair such that the shapes and sizes of the oil transfer holes 211 are symmetrical with respect to the central axis of the shaft 200 as shown in FIG.

At this time, the pair of oil transfer holes 211 can be formed so that the sum of the oil transfer amounts through the oil transfer holes 211 corresponds to the set oil transfer amount.

For example, when two oil transfer holes 211 are formed as shown in FIG. 4 (a), the diameter D1 of each oil transfer hole 211 is set so that the oil corresponding to half of the set oil transfer amount .

As another example, when four oil transfer holes 211 are formed as shown in FIG. 4 (b), the diameter D2 of each oil transfer hole 211 is set so that oil corresponding to 1/4 of the set oil transfer amount In the case of FIG. 4 (c), the diameter D3 of the oil transfer hole 211 may be formed so that oil corresponding to 1/6 of the set oil transfer amount can pass therethrough for the same reason .

5 is an exploded perspective view of the bush shown in Fig.

Referring to FIG. 5, the bushing 400 may have sealing members 401 and 402 respectively coupled to the inner and outer surfaces of the central space 410 through which the upper shaft 220 passes, as shown in FIG. 1 have.

The sealing members 401 and 402 are provided to prevent the oil stored in the oil filling hole 111 from leaking. For the same purpose, as shown in FIG. 3, the sealing member 101 is also provided below the shaft through- .

Figs. 6 to 8 are views for explaining the operation of Fig.

Referring to FIG. 6, the shock absorber A according to the present invention has a structure in which the piston 210 is in close contact with the lower surface of the bush 400 by the resilient elastic member 300, The hole 111 can be filled with oil.

7, when the shaft 200 is moved in the downward direction by an opening operation force (box-shaped arrow in FIG. 7) applied to the shaft 200 from the vacuum valve, The oil passes through the oil transfer hole 211 of the piston 210 and moves upward.

At this time, since the amount of oil stored in the oil transfer hole 211 is constant, it is preferable that the volume of the shaft 200 existing in the oil transfer hole 211 is kept constant.

Accordingly, the shaft 200 can be moved in the direction of the central axis in the oil filling hole 111, or in the direction in which the piston 210 moves in the direction of the central axis within the oil filling hole 111, It is possible to prevent an increase in pressure due to a volume change in the oil filling hole 111 by forming the lower shaft 220 and the lower shaft 230 so that they have the same volume.

For example, when the upper shaft 220 and the lower shaft 230 have the same sectional area, the length L1 of the upper shaft 220 flowing into the oil filling hole 111, The length L2 of the lower shaft 230 protruding from the hole 111 and projecting to the lower portion of the housing 100 should be the same.

As shown in FIG. 7, the shock absorber A according to the present invention is a case in which an opening operation force is applied in a pushing manner, and a pulling operation force of pulling the lower shaft 230 The same or similar operation is also performed.

Therefore, it is preferable that the upper and lower portions of the shaft 200 are exposed to the outside of the housing 200 in order to apply both the pushing method and the pulling- Do.

FIG. 9 is a perspective view showing another embodiment of a shock absorber for a vacuum circuit breaker of a high-voltage breaking device according to the present invention, and FIG. 10 is a state view of FIG.

Referring to FIG. 9, a thread 103 may be formed on the outer circumferential surface of the housing 100, at least a part of which is fastened with a nut (Nut) 600.

Accordingly, the shock absorber A according to the present invention is provided with at least one fixing nut (Nut) 600 corresponding to the position of the vacuum valve constituted in the high-voltage breaking device (power device) (Or a housing DH to which a vacuum valve is coupled).

In addition, the shock absorber A according to the present invention includes a fixing nut 600 and is configured so that the respective components are coupled to each other in a fitting manner, and the inner space portion of the housing 100 is formed in a multi- It is possible to easily couple and separate the respective components to be coupled to the housing 100 in one direction without using any separate equipment. Accordingly, it is possible to replace the worn components, Management can be made very easily.

The shock absorber for the vacuum circuit breaker of the high voltage breaking device according to the present invention has been described above. It will be understood by those skilled in the art that the technical features of the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

It is to be understood, therefore, that the embodiments described above are in all respects illustrative and not restrictive.

A: Shock absorber
100: housing 110: multi-
111: Oil filling hole 112: Shaft penetration hole
113: Bush coupling hole 114: Support hole
200: Shaft
210: Piston 211: Oil transfer hole
220: upper shaft 230: lower shaft
300: resilient elastic member
400: Bush
500: District
600: Fixing nut

Claims

A housing formed with a multi-stage space portion including an oil filling hole filled with oil and passing through a central axis; A shaft formed at a central portion of the housing, the housing having at least one oil passage hole formed therethrough, the shaft being axially coupled to the multi-space space of the housing such that the piston is slidably moved in the oil filling hole; A resilient restoring member for restoring the piston to the original position; And a bush configured in the multi-stage space to limit the moving distance of the piston,
The multi-
A shaft through hole through which one side of the shaft passes; And a bushing hole in which the bushing is formed, wherein the shaft through hole, the oil filling hole, and the bushing hole are sequentially connected in a multi-step manner so as to be widened along one direction from one side to the other,
Wherein a bush hole is further formed in the other direction of the bush coupling hole and the bush hole is detachably coupled to the bush hole so as to be detachable from the bush hole.

The method according to claim 1,
The shaft includes:
The piston is divided into an upper shaft and a lower shaft around the piston,
Wherein the volume of the upper shaft and the lower shaft flowing into the oil filling hole or flowing out from the oil filling hole is the same in the process of the piston moving in the center axis direction within the oil filling hole. Shock Absorber.

The method according to claim 1,
The oil transfer hole
The oil stored in the oil filling hole is formed so as to move to one side or the other side in the course of the movement of the piston in the center axis direction within the oil filling hole,
At least one of the shape and the size of the oil transfer hole
Wherein the shock absorber is formed corresponding to a set oil movement amount determined based on at least one of a magnitude of an opening operation force applied to the shaft from the vacuum valve and an established shock absorption force.

The method of claim 3,
The oil transfer hole
At least one pair is formed such that the shape and size of the shaft are symmetrical with respect to the central axis of the shaft,
Wherein the sum of the oil movement amounts passing through the pair of oil transfer holes is formed to correspond to the set oil shift amount.

The method according to claim 1,
The shaft includes:
Wherein the shock absorber is configured to penetrate through the housing in one direction about the piston and penetrate the bush in the other direction.

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6. The method according to any one of claims 1 to 5,
The shaft includes:
And both end portions of the shock absorber protrude to the outside of the housing.