Maintenance tool for high-voltage vacuum circuit breaker

Abstract

The utility model discloses a maintenance tool for a high-voltage vacuum circuit breaker, which relates to the field of maintenance tools and comprises a handle and a connecting key, the connecting key is matched with a key slot of a main shaft of the vacuum circuit breaker, one end of the handle is provided with a bending part, the free end of the bending part is provided with the connecting key, and the connecting key is arranged towards the key slot of the main shaft of the vacuum circuit breaker; according to the utility model, the bending part is utilized to ensure that the connecting key crosses the vacuum circuit breaker main shaft and enters the internal space of the vacuum circuit breaker box body, so that the connecting key is clamped on the key slot on one side of the vacuum circuit breaker main shaft far away from the box door, and at the moment, the vacuum circuit breaker main shaft can be controlled to rotate anticlockwise or clockwise by lifting the handle or pressing the handle; the vacuum circuit breaker main shaft is not easy to shake during rotation, is high in stability, facilitates the improvement of the control precision, only needs to rotate reversely when excessive rotation occurs, effectively improves the maintenance efficiency, does not damage the surface of the vacuum circuit breaker main shaft, and improves the maintenance quality.

Description

Technical Field

[0001] The utility model relates to the field of maintenance tools, in particular to a maintenance tool for a high-voltage vacuum circuit breaker. Background Art

[0002] After long-term use, the contact surface of the high-voltage vacuum circuit breaker will be oxidized and the lubricant will age, resulting in the problem of unqualified contact resistance. Therefore, it is necessary to perform maintenance regularly or according to the contact resistance test results. During maintenance, the vacuum bubble and corresponding accessories need to be removed. When removing, the pin between the main shaft of the circuit breaker and the moving contact connecting rod needs to be taken out before the vacuum bubble can be pulled out. However, when the high-voltage vacuum circuit breaker is designed, for safety reasons, whether the circuit breaker is in the closed position or the open position, the pin will not be directly opposite the maintenance hole. At this time, the main shaft of the circuit breaker should be rotated so that the pin is directly opposite the maintenance hole before the pin can be knocked out with a jackshaft.

[0003] At present, most of the methods for rotating the main shaft of the circuit breaker use a pipe wrench. Specifically, the pipe wrench is used to clamp the main shaft and then rotate it. However, when knocking the jackshaft, it will shake, and it is very difficult for the pipe wrench to clamp the main shaft. Moreover, when the pipe wrench is actually used, only rotating in the opening direction of the pipe wrench can ensure stable clamping. When rotating in the direction opposite to the opening of the pipe wrench, it is easy to loosen and the jaws will come out, which is very difficult to control. Therefore, when the pipe wrench clamps the main shaft to adjust the alignment of the pin and the maintenance hole, it cannot be rotated back. Once the adjustment is excessive, it needs to be rotated one more week, seriously affecting the maintenance efficiency; in addition, the jaws of the pipe wrench are serrated and are likely to scratch the surface of the main shaft under the action of force, affecting the maintenance quality.

[0004] Therefore, people urgently need a maintenance tool for a high-voltage vacuum circuit breaker that can improve the maintenance efficiency and quality and has high connection stability with the main shaft. Summary of the Invention

[0005] The purpose of the utility model is to provide a maintenance tool for a high-voltage vacuum circuit breaker to solve the problems existing in the above-mentioned prior art. By directly clamping the connection key in the keyway of the main shaft of the vacuum circuit breaker, the main shaft of the vacuum circuit breaker can be controlled to rotate counterclockwise or clockwise, effectively improving the maintenance efficiency and quality, and having high connection stability.

[0006] To achieve the above purpose, the utility model provides the following solution: The utility model provides a maintenance tool for a high-voltage vacuum circuit breaker, including a handle and a connection key. The connection key is matched with the keyway of the main shaft of the vacuum circuit breaker. One end of the handle is provided with a bent portion, and the free end of the bent portion is provided with the connection key. The connection key is arranged towards the keyway of the main shaft of the vacuum circuit breaker.

[0007] Preferably, the connection key is perpendicular to the handle.

[0008] Preferably, the bent portion is in a semi-circular ring shape.

[0009] Preferably, the handle is connected to the bent portion through a connecting rod, and the sum of the lengths of the handle and the connecting rod is greater than the distance between the main shaft of the vacuum circuit breaker and the door of the vacuum circuit breaker box.

[0010] Preferably, the included angle between the connecting rod and the handle is 150°-160°, and the included angle is arranged on the side of the connecting rod away from the bent portion.

[0011] Preferably, the connecting rod and the bent portion are integrally formed.

[0012] Preferably, the handle is provided with a hollow structure.

[0013] Preferably, a heat shrinkable sleeve is sleeved on the handle.

[0014] Preferably, the material of the connecting key is carbon steel, the material of the bent portion is manganese alloy steel, and the material of the handle is stainless steel.

[0015] Preferably, the handle, the bent portion and the connecting key are connected by welding.

[0016] The present utility model mainly achieves the following technical effects compared with the prior art:

[0017] By using the bent portion, it can ensure that the connecting key crosses the main shaft of the vacuum circuit breaker and enters the internal space of the vacuum circuit breaker box body, so as to be clamped on the key groove on the side of the main shaft of the vacuum circuit breaker away from the box door. At this time, by lifting or pressing down the handle, the main shaft of the vacuum circuit breaker can be controlled to rotate counterclockwise or clockwise, and it is not easy to shake during rotation, with high stability, which is beneficial to improving the control accuracy. When the rotation is excessive, only a reverse rotation is required, effectively improving the maintenance efficiency, and the surface of the main shaft of the vacuum circuit breaker will not be damaged, improving the maintenance quality.

[0018] The following technical effects are achieved by other solutions of the present utility model compared with the prior art:

[0019] The setting of the semi-circular ring-shaped bent portion can shorten the maximum distance between the outer peripheral wall of the bent portion and the main shaft of the vacuum circuit breaker compared with the right-angle bent structure, so as to be more adaptable to the inside of the vacuum circuit breaker, especially the narrow space between the main shaft of the vacuum circuit breaker and the inner bottom wall of the vacuum circuit breaker.

[0020] The setting of the connecting rod lengthens the overall length, so that the handle can extend to the outside of the box body of the vacuum circuit breaker, reducing the limitation of the narrow space inside the vacuum circuit breaker on the force application to control the handle.

[0021] The inclined setting of the connecting rod and the handle can increase the distance of the up and down movement of the handle, thereby increasing the rotation range of the main shaft of the vacuum circuit breaker.

[0022] The setting of the heat shrink sleeve plays a role in insulation and anti-slip, facilitating the application of force by maintenance personnel while improving the safety of tool use. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of the high-voltage vacuum circuit breaker maintenance tool of the present invention;

[0025] Figure 2 It is the front view of the high-voltage vacuum circuit breaker maintenance tool of the present invention;

[0026] Figure 3 It is the top view of the high-voltage vacuum circuit breaker maintenance tool of the present invention;

[0027] Among them, 1. Connecting key; 2. Bent part; 3. Connecting rod; 4. Heat shrink sleeve; 5. Handle. Specific Embodiments

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0029] The purpose of the present invention is to provide a high-voltage vacuum circuit breaker maintenance tool to solve the problems existing in the prior art. By directly clamping the connecting key in the keyway of the main shaft of the vacuum circuit breaker, the main shaft of the vacuum circuit breaker can be controlled to rotate up and down, effectively improving the maintenance efficiency and quality, and having high connection stability.

[0030] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0031] Please refer to as Figures 1 to 3As shown in the figure, a maintenance tool for a high-voltage vacuum circuit breaker is provided, which includes a handle 5 and a connection key 1. The connection key 1 is matched with the keyway of the main shaft of the vacuum circuit breaker. Due to safety considerations in the design of the vacuum circuit breaker, when it is in the open position, the keyway on the main shaft of the vacuum circuit breaker will face away from the door of the vacuum circuit breaker box. And during maintenance, the vacuum circuit breaker needs to be controlled in the open position. Therefore, a bending part 2 is provided at one end of the handle 5, and a connection key 1 is provided at the free end of the bending part 2, which is convenient for the connection key 1 to extend into the space on the side of the main shaft of the vacuum circuit breaker away from the box door, and the connection key 1 is arranged towards the keyway of the main shaft of the vacuum circuit breaker. The bending part 2 can be a semi-circular ring with an opening facing the handle 5, a V-shaped with an opening facing the handle 5, a rod-shaped with an L shape with the handle 5, an L-shaped rod with a U shape with the handle 5, etc. The working principle of this maintenance tool is: the bending part 2 can ensure that the connection key 1 crosses the main shaft of the vacuum circuit breaker and enters the internal space of the vacuum circuit breaker box, so as to be clamped on the keyway on the side of the main shaft of the vacuum circuit breaker away from the box door. At this time, by lifting or pressing the handle 5, the main shaft of the vacuum circuit breaker can be controlled to rotate counterclockwise or clockwise, and it is not easy to shake during rotation, with high stability, which is beneficial to improving the control accuracy. When the rotation is excessive, only a reverse rotation is required, which effectively improves the maintenance efficiency and will not damage the surface of the main shaft of the vacuum circuit breaker, improving the maintenance quality.

[0032] Preferably, the bending part 2 is in a semi-circular ring shape. The setting of the semi-circular ring can shorten the maximum distance between the outer peripheral wall of the bending part 2 and the main shaft of the vacuum circuit breaker compared with a right-angle or sharp-angle bending structure, so as to better adapt to the inside of the vacuum circuit breaker, especially the narrow space between the main shaft of the vacuum circuit breaker and the inner bottom wall of the vacuum circuit breaker.

[0033] In order to drive the rotation of the main shaft of the vacuum circuit breaker more labor-saving, the connection key 1 is arranged perpendicular to the handle 5.

[0034] The handle 5 is connected to the bending part 2 through a connecting rod 3. The sum of the lengths of the handle 5 and the connecting rod 3 is greater than the distance between the main shaft of the vacuum circuit breaker and the door of the vacuum circuit breaker box. The setting of the connecting rod 3 lengthens the overall length, so that the handle 5 can extend to the outside of the box of the vacuum circuit breaker, reducing the limitation of the narrow space inside the vacuum circuit breaker on the force application to control the handle 5.

[0035] The included angle between the connecting rod 3 and the handle 5 is 150° - 160°, and the included angle is arranged towards the side of the connecting rod away from the bending part 2, that is, the connecting rod 3 and the handle 5 are inclined to each other. The inclined setting of the connecting rod 3 and the handle 5 can increase the distance of the up and down movement of the handle 5, thereby increasing the rotation range of the main shaft of the vacuum circuit breaker.

[0036] The connecting rod 3 and the bending part 2 can be integrally formed to improve the structural strength.

[0037] Preferably, the handle 5 is hollow, which improves the convenience of use.

[0038] The handle 5 is sleeved with a heat shrinkable sleeve 4, which can play the roles of insulation and anti-slip. While facilitating the application of force by maintenance personnel, it improves the safety of tool use.

[0039] In this embodiment, the material of the connecting key 1 is 45# carbon steel, the material of the bending part 2 is manganese alloy steel, and the material of the handle 5 is 304 stainless steel, making the overall structure have high strength and good toughness. The handle 5, the bending part 2 and the connecting key 1 are connected by welding.

[0040] In this embodiment, the length of the connecting rod 3 is 150 mm - 170 mm, the outer diameter of the bending part 2 is 70 mm - 90 mm, and the inner diameter is 50 mm - 70 mm. The two are integrally cut from a manganese alloy steel plate with a thickness of 15 mm - 20 mm; the handle 5 is a pipe body with a diameter of 32 mm and a thickness of 2 mm, and the length of the handle 5 is 300 mm - 400 mm; the size of the connecting key 1 is 12 * 10 * 55 mm.

[0041] Of course, the sizes of the connecting rod 3, the bending part 2, the connecting key 1 and the handle 5 can also be determined according to actual needs.

[0042] During actual use, hold the handle 5 and control the bending part 2 to pass through from the bottom of the main shaft of the vacuum circuit breaker. Then, control the connecting key 1 on the bending part 2 to be stuck in the key groove of the main shaft of the vacuum circuit breaker. At this time, lift the handle 5 to control the main shaft of the vacuum circuit breaker to rotate counterclockwise, and press down the handle 5 to control the main shaft of the vacuum circuit breaker to rotate clockwise.

[0043] Adaptations made according to actual requirements are all within the protection scope of the present utility model.

[0044] It should be noted that for those skilled in the art, obviously, the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0045] In this utility model, specific examples are used to elaborate on the principle and implementation manner of this utility model. The description of the above embodiments is only used to help understand the method and its core idea of this utility model; at the same time, for those of ordinary skill in the art, according to the idea of this utility model, there will be changes in the specific implementation manner and application scope. To sum up, the content of this specification should not be construed as a limitation on this utility model.

Claims

1. A high voltage vacuum circuit breaker maintenance tool, characterized in that: It comprises a handle and a connecting key, wherein the connecting key matches the keyway of the vacuum circuit breaker main shaft, a bending portion is arranged at one end of the handle, the connecting key is arranged at the free end of the bending portion, and the connecting key is arranged toward the keyway of the vacuum circuit breaker main shaft.

2. The high-voltage vacuum circuit breaker maintenance tool according to claim 1, characterized in that: The connecting key is arranged vertically to the handle.

3. The high-voltage vacuum circuit breaker maintenance tool according to claim 1, characterized in that: The bending portion is in a semicircular shape.

4. The high-voltage vacuum circuit breaker maintenance tool according to claim 1, characterized in that: The handle is connected to the bent portion via a connecting rod, and the sum of the lengths of the handle and the connecting rod is greater than the distance between the vacuum circuit breaker main shaft and the vacuum circuit breaker box door.

5. The high-voltage vacuum circuit breaker maintenance tool according to claim 4, characterized in that: The included angle between the connecting rod and the handle is 150°-160°, and the included angle is set toward a side of the connecting rod away from the bending portion.

6. The high-voltage vacuum circuit breaker maintenance tool according to claim 4, characterized in that: The connecting rod and the bending portion are integrally formed.

7. The high voltage vacuum circuit breaker maintenance tool according to claim 1, characterized in that: The handle is hollow.

8. The high-voltage vacuum circuit breaker maintenance tool according to claim 1, characterized in that: The handle outer shell is provided with a heat shrink sleeve.

9. The high-voltage vacuum circuit breaker maintenance tool according to claim 1, characterized in that: The material of the connecting key is carbon steel, the material of the bending part is manganese alloy steel, and the material of the handle is stainless steel.

10. The high voltage vacuum circuit breaker maintenance tool according to claim 9, characterized in that: The handle, the bending portion and the connecting key are welded and connected.

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