Dismounting device for arc extinguish chamber of switching mechanism of vacuum circuit breaker

Abstract

The utility model relates to the technical field of maintenance of vacuum circuit breakers, in particular to a dismounting device for an arc extinguish chamber of a vacuum circuit breaker switching mechanism, and can solve the problems that no professional tool is used for dismounting the arc extinguish chamber of the vacuum circuit breaker switching mechanism in the prior art, and the arc extinguish chamber cannot be dismounted in the dismounting process to a certain extent. A worker needs to wedge a wedge-shaped object into a joint of the switch body and the vacuum arc-extinguishing chamber, and the switch body and the vacuum arc-extinguishing chamber are forcibly separated by external force, so that time and labor are wasted, and the vacuum arc-extinguishing chamber is easily damaged. The dismounting device comprises a fixed plate and a top plate, the fixed plate is movably hinged with the top plate through a round nut; a threaded hole is formed in the fixing plate, a lead screw is arranged in the threaded hole, and the lead screw can reciprocate in the axial direction of the threaded hole; a handle is further installed at the end, away from the fixing plate, of the lead screw.

Description

Technical Field

[0001] The present application relates to the technical field of maintenance of vacuum circuit breakers, and more specifically, to a disassembly device for an arc extinguishing chamber of a switching mechanism of a vacuum circuit breaker. Background Art

[0002] A vacuum circuit breaker is the main electrical switch of an electric locomotive. The vacuum circuit breaker can connect and disconnect the locomotive from the catenary power supply. When a fault occurs in the vacuum circuit breaker, it will affect the normal operation of the locomotive. Therefore, when a fault occurs in the vacuum circuit breaker, it is necessary to disassemble and repair the internal parts of the vacuum circuit breaker.

[0003] The vacuum circuit breaker includes a switching mechanism, which is composed of a switch body and an arc extinguishing chamber. The switch body plays a supporting role for the entire mechanism. The arc extinguishing chamber has conducting and breaking contacts, which play the role of conducting and breaking of the vacuum circuit breaker. Before assembly, Loctite 207 sealant is applied to the joint between the arc extinguishing chamber and the switch body. The sealant has a certain viscosity, and it is not easy to remove the arc extinguishing chamber during maintenance disassembly.

[0004] However, in the prior art, there is no professional tool for disassembling the arc extinguishing chamber of the switching mechanism of the vacuum circuit breaker. During the disassembly process, it is necessary for the staff to wedge a wedge into the joint between the switch body and the arc extinguishing chamber and forcibly separate the two with an external force, which is time-consuming and laborious, and is likely to damage the arc extinguishing chamber. Summary of the Utility Model

[0005] In order to solve the problem that in the prior art, there is no professional tool for disassembling the arc extinguishing chamber of the switching mechanism of the vacuum circuit breaker. During the disassembly process, it is necessary for the staff to wedge a wedge into the joint between the switch body and the arc extinguishing chamber and forcibly separate the two with an external force, which is time-consuming and laborious, and is likely to damage the arc extinguishing chamber, the present application provides a disassembly device for an arc extinguishing chamber of a switching mechanism of a vacuum circuit breaker.

[0006] The embodiments of the present application are implemented as follows:

[0007] The present application provides a disassembly device for an arc extinguishing chamber of a switching mechanism of a vacuum circuit breaker, including a fixing plate and a top plate;

[0008] The fixing plate and the top plate are movably hinged by a round nut;

[0009] A threaded hole is provided on the fixing plate, and a lead screw is arranged in the threaded hole. The lead screw can reciprocate along the axial direction of the threaded hole;

[0010] A handle is further installed at one end of the lead screw away from the fixing plate.

[0011] In a possible implementation, the fixed plate is supported on the arc extinguishing chamber of the switching mechanism, and the inner wall of the fixed plate is attached to the switch body.

[0012] In a possible implementation, the top plate is connected to the round nut by screws.

[0013] In a possible implementation, the top plate is arranged on the end faces of two screw rods at the upper end of the arc extinguishing chamber.

[0014] In a possible implementation, the handle is fixedly connected to the lead screw, and the handle can drive the lead screw to rotate, so that the lead screw reciprocates axially along the threaded hole.

[0015] In a possible implementation, both ends of the fixed plate are set as bent arcs.

[0016] In a possible implementation, a groove matching the width of the arc extinguishing chamber is provided on the fixed plate.

[0017] In a possible implementation, a chamfer is provided at the bottom of the groove, and the inclined surface of the chamfer is arranged downward.

[0018] In a possible implementation, the handle is a straight rod passing through the tail of the threaded rod, and the handle is perpendicular to the threaded rod.

[0019] In a possible implementation, spherical protrusions convenient for holding are provided at both ends of the handle.

[0020] The technical solution provided by this application can at least achieve the following beneficial effects:

[0021] The disassembly device for the arc extinguishing chamber of the vacuum circuit breaker switching mechanism provided by this application supports the fixed plate on the side of the switch body and the top of the arc extinguishing chamber, and the top plate is arranged on the end face of the fastening screw of the arc extinguishing chamber. Thus, the disassembly device can be supported on the switching mechanism through the fixed plate, facilitating the cooperation between the disassembly device and the switching mechanism; further, the setting of the fixed plate plays a supporting role for the top plate, improving the stability when the bottom of the top plate moves along the axis direction of the arc extinguishing chamber screw, thereby improving the reliability of the structure of the disassembly device. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1It is a schematic structural diagram of a switching mechanism shown in an exemplary embodiment of the present application;

[0024] Figure 2 It is a schematic structural diagram of a disassembly device shown in an exemplary embodiment of the present application;

[0025] Figure 3 It is a schematic structural diagram of the disassembly device from another perspective shown in an exemplary embodiment of the present application;

[0026] Figure 4 It is a schematic diagram of the cooperation between the disassembly device and the switching mechanism shown in an exemplary embodiment of the present application;

[0027] Figure 5 It is a schematic structural diagram of a fixing plate shown in an exemplary embodiment of the present application;

[0028] Figure 6 It is a schematic structural diagram of a top plate shown in an exemplary embodiment of the present application.

[0029] Reference numerals:

[0030] 1, fixing plate; 2, top plate; 3, threaded hole; 4, round nut; 5, lead screw; 6, handle; 7, spherical protrusion. Detailed implementation manners

[0031] In order to make the purpose, implementation manners and advantages of the present application clearer and more understandable, the following will clearly and completely describe the exemplary implementation manners of the present application in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, rather than all the embodiments. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the implementation manners described next, rather than intending to limit the implementation manners of the present application. Unless otherwise specified, these terms should be understood in their ordinary and common meanings.

[0033] The terms "first", "second", "third", etc. in the specification, claims and above-mentioned drawings of the present application are used to distinguish similar or same-kind objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that such terms can be interchanged under appropriate circumstances.

[0034] The terms "comprising" and "having" and any variations thereof are intended to cover but not exclusively include. For example, a product or device comprising a series of components does not necessarily have to be limited to all the components clearly listed, but may include other components not clearly listed or inherent to these products or devices.

[0035] Before explaining the disassembly device for the arc extinguishing chamber of the vacuum circuit breaker switching mechanism provided in the embodiments of the present application, the application scenarios and implementation environments of the embodiments of the present application will be introduced first.

[0036] Figure 1 It is a schematic structural diagram of a switching mechanism shown in an exemplary embodiment of the present application.

[0037] The vacuum circuit breaker is the main electrical switch of an electric locomotive. The vacuum circuit breaker can connect and disconnect the locomotive from the catenary power supply. When the vacuum circuit breaker fails, it will affect the normal operation of the locomotive. Therefore, when the vacuum circuit breaker fails, it is necessary to disassemble and repair the internal parts of the vacuum circuit breaker.

[0038] As Figure 1 shown, the vacuum circuit breaker includes a switching mechanism, which is composed of a switch body and an arc extinguishing chamber. The switch body plays a supporting role for the entire mechanism. The arc extinguishing chamber has conducting and breaking contacts, which play the role of connecting and disconnecting the vacuum circuit breaker. Before assembly, Loctite 207 sealant is applied to the joint between the arc extinguishing chamber and the switch body. The sealant has a certain viscosity, and it is not easy to remove the arc extinguishing chamber during the disassembly and repair.

[0039] However, in the prior art, there is no professional tool for disassembling the arc extinguishing chamber of the vacuum circuit breaker switching mechanism. During the disassembly process, the staff needs to wedge a wedge into the joint between the switch body and the arc extinguishing chamber and forcefully separate the two with an external force, which is time-consuming and laborious, and is easy to damage the arc extinguishing chamber.

[0040] Based on this, the present application provides a disassembly device for the arc extinguishing chamber of the vacuum circuit breaker switching mechanism. By supporting the fixing plate 1 on the side of the switch body and the top of the arc extinguishing chamber, and setting the top plate 2 on the end face of the fastening screw of the arc extinguishing chamber, the disassembly device can be supported on the switching mechanism through the fixing plate 1, which facilitates the cooperation between the disassembly device and the switching mechanism; further, the setting of the fixing plate 1 plays a supporting role for the top plate 2, improving the stability when the bottom of the top plate 2 moves along the axis direction of the arc extinguishing chamber screw, thereby improving the reliability of the structure of the disassembly device.

[0041] Next, the technical solutions of the present application will be specifically described in detail through embodiments and in conjunction with the drawings, as well as how the technical solutions of the present application solve the above technical problems. The embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments.

[0042] Figure 2 It is a schematic structural diagram of the disassembly device shown in an exemplary embodiment of the present application, Figure 3It is a schematic structural diagram of another perspective of the disassembly device shown in an exemplary embodiment of the present application. Figure 6 It is a schematic structural diagram of the top plate 2 shown in an exemplary embodiment of the present application.

[0043] In an exemplary embodiment, as Figure 2 , Figure 3 and Figure 6 shown, a disassembly device for the arc extinguishing chamber of a vacuum circuit breaker switching mechanism is provided. In this embodiment, the disassembly device includes a fixing plate 1 and a top plate 2;

[0044] The fixing plate 1 and the top plate 2 are movably hinged by a round nut 4;

[0045] The fixing plate 1 is supported on the arc extinguishing chamber of the switching mechanism, and the inner wall of the fixing plate 1 is in contact with the switch body;

[0046] The top plate 2 is connected to the round nut 4 by screws, and the top plate 2 is arranged on the end faces of two screws at the upper end of the arc extinguishing chamber;

[0047] A threaded hole 3 is provided on the fixing plate 1, and a lead screw 5 is arranged in the threaded hole 3. The lead screw 5 can reciprocate along the axial direction of the threaded hole 3;

[0048] A handle 6 is further installed at one end of the lead screw 5 away from the fixing plate 1.

[0049] In a possible implementation manner, the handle 6 is fixedly connected to the lead screw 5, and the handle 6 can drive the lead screw 5 to rotate, so that the lead screw 5 reciprocates along the axial direction of the threaded hole 3.

[0050] Figure 5 It is a schematic structural diagram of the fixing plate 1 shown in an exemplary embodiment of the present application.

[0051] In a possible implementation manner, both ends of the fixing plate 1 are set as bent arcs. A groove matching the width of the arc extinguishing chamber is provided on the fixing plate 1, and a chamfer is provided at the bottom of the groove. The inclined surface of the chamfer is arranged downward.

[0052] In a possible implementation manner, the handle 6 is a straight rod passing through the tail of the threaded rod, and the handle 6 is perpendicular to the threaded rod. Spherical protrusions 7 convenient for holding are provided at both ends of the handle 6.

[0053] Figure 4 It is a schematic diagram of the cooperation between the disassembly device and the switching mechanism shown in an exemplary embodiment of the present application.

[0054] Working process: As Figure 4As shown, remove the fastening nut for fastening the vacuum interrupter. After placing the disassembly device, when turning the handle 6 of the disassembly device, the handle 6 drives the screw rod 5 to rotate. The screw rod 5 pushes against the top of the top plate 2 and moves outward. Due to the lever effect, the bottom of the top plate 2 moves inward. The bottom of the top plate 2 will give a thrust to the two screws at the top of the vacuum interrupter, forcibly separating the vacuum interrupter from the switch body, and realizing the non-destructive disassembly of the vacuum interrupter.

[0055] Working principle: By turning the handle 6, the handle 6 drives the screw rod 5 to rotate. The screw rod 5 pushes against the top of the top plate 2 and moves outward. Due to the lever effect, the bottom of the top plate 2 moves inward. The bottom of the top plate 2 will give a thrust to the two screws at the top of the vacuum interrupter, forcibly separating the vacuum interrupter from the switch body, and realizing the non-destructive disassembly of the vacuum interrupter.

[0056] It should be understood that although the steps in the flowcharts involved in the above embodiments are shown in sequence according to the indications, these steps are not necessarily executed in the order indicated. Unless there is a clear indication in this article, the execution of these steps has no strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0057] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as within the scope described in this specification.

[0058] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A disassembly device for an arc extinguishing chamber of a vacuum circuit breaker switch mechanism, characterized in that: Including a fixing plate and a top plate; The fixing plate and the top plate are movably hinged via round nuts; A threaded hole is provided on the fixing plate, a screw rod is provided in the threaded hole, and the screw rod can reciprocate along the axial direction of the threaded hole; A handle is also installed at one end of the screw rod away from the fixing plate.

2. The disassembly device for the arc extinguishing chamber of the switch mechanism of the vacuum circuit breaker according to claim 1, characterized in that: The fixing plate is supported on the arc extinguishing chamber of the switch mechanism, and the inner wall of the fixing plate is in contact with the switch body.

3. The disassembly device for the arc extinguishing chamber of the switch mechanism of the vacuum circuit breaker according to claim 1, characterized in that: The top plate is connected to the round nut via screws.

4. The disassembly device for the arc extinguishing chamber of the switch mechanism of the vacuum circuit breaker according to claim 1, characterized in that: The top plate is arranged on two screw end faces at the upper end of the arc extinguishing chamber.

5. The disassembly device for the arc extinguishing chamber of the switch mechanism of the vacuum circuit breaker according to claim 1, characterized in that: The handle is fixedly connected to the screw rod, and the handle can drive the screw rod to rotate, so that the screw rod reciprocates along the axial direction of the threaded hole.

6. The disassembly device for the arc extinguishing chamber of the switch mechanism of the vacuum circuit breaker according to claim 3, characterized in that: Both ends of the fixing plate are arranged in a bent arc shape.

7. The disassembly device for the arc extinguishing chamber of the switch mechanism of a vacuum circuit breaker according to claim 1, characterized in that: The fixing plate is provided with a groove matching the width of the arc extinguishing chamber.

8. The disassembly device for the arc extinguishing chamber of the switch mechanism of a vacuum circuit breaker according to claim 7, characterized in that: A chamfer is arranged at the bottom of the groove, and the inclined surface of the chamfer is arranged downward.

9. The disassembly device for the arc extinguishing chamber of the switch mechanism of a vacuum circuit breaker according to claim 8, characterized in that: The handle is a straight rod that passes through the tail of the screw rod, and the handle is perpendicular to the screw rod.

10. The disassembly device for the arc extinguishing chamber of the switch mechanism of a vacuum circuit breaker according to claim 1, characterized in that: Both ends of the handle are provided with spherical protrusions for easy gripping.

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