Anti-falling key for opening and closing baffle plate of vacuum circuit breaker of high-voltage cabinet

Abstract

The utility model discloses an anti-falling key for opening and closing a high-voltage cabinet vacuum circuit breaker baffle plate, which comprises a key head and a handle, and the key head is matched with a key hole of a lock cylinder of the vacuum circuit breaker baffle plate; the handle is arranged at one end of the key head, a magnet is arranged on the surface, facing the key head, of the handle, and the height of the magnet is consistent with the height, protruding out of a cabinet body panel, of a lock cylinder of a vacuum circuit breaker baffle. The key has the advantages that the magnet is arranged on the handle of the key, the magnet is adsorbed on the cabinet body panel of the high-voltage cabinet during operation, and when the baffle plate is opened or closed along with rotation of an operator, the baffle plate can be opened and stopped immediately and closed immediately, so that the baffle plate can be prevented from rebounding, and the service life of the high-voltage cabinet can be prolonged. And the key falling phenomenon caused by the problems of the rebound effect of the baffle plate, small operation angle and the like can be avoided, so that an operator can operate the handcart crank with two hands, and potential safety hazards are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric cabinet keys, in particular to an anti-drop key used for switching a baffle of a vacuum circuit breaker in a high-voltage cabinet. Background Art

[0002] Although the high-voltage cabinets and vacuum circuit breakers in the workshop joint workshop substation and the power center substation currently have different models, the vacuum circuit breaker protection panels of these high-voltage cabinets are all equipped with a swing-in / out baffle. This baffle is in a normally closed position to prevent accidental operation. When operators are performing dangerous power outage operations, they can only use a universal cabinet key to open and close the vacuum circuit breaker swing-in / out baffle. However, using a universal cabinet key presents the following problems:

[0003] First, the insertion part of the universal electrical cabinet key is too small compared to the keyhole of the vacuum circuit breaker baffle, and the gap is large after insertion. In addition, because the baffle has a rebound effect, the operating angle after the key is inserted is small, only 45°. As a result, the universal electrical cabinet key will inevitably fall off due to the rebound force of the closing baffle after the key is inserted into the keyhole to complete the opening operation.

[0004] Second, the handle of the universal electrical cabinet key is too long, and the exposed part reaches 40mm after the key is inserted. When the operator wears protective equipment such as insulating gloves, it is very easy to knock off the universal electrical cabinet key during the power-off operation. He can only use one hand to hold the universal key steady and the other hand to operate the trolley handle to rock it in and out. This increases the difficulty of operation and poses a serious safety hazard.

[0005] Third, after the operation is completed, the key is very likely to fall, causing an electrical safety accident. To avoid this phenomenon, the operator will take the key and place it on an insulating pad. When the next high-voltage cabinet is shut down for power supply, the above opening and closing steps will be repeated again. The operation steps become cumbersome and the safety risks are increased. Utility Model Content

[0006] In order to solve at least one of the above technical problems, the utility model provides an anti-drop key for switching the baffle of a vacuum circuit breaker in a high-voltage cabinet. A magnet is provided on the surface of the handle facing the key head so that the key can be adsorbed on the cabinet panel of the high-voltage cabinet to prevent the key from falling.

[0007] The utility model solves the technical problem by adopting the following technical solutions:

[0008] An anti-drop key for switching a vacuum circuit breaker baffle of a high-voltage cabinet comprises a key head and a handle. The key head is adapted to the keyhole of a lock core of the vacuum circuit breaker baffle. The handle is arranged at one end of the key head. A magnet is provided on the surface of the handle facing the key head. The height of the magnet is consistent with the height of the lock core of the vacuum circuit breaker baffle protruding from the cabinet panel.

[0009] Furthermore, the magnets include a plurality of magnets, and the magnetic force of each magnet is 400-500 gauss, so that the magnets can be firmly adsorbed on the cabinet panel without affecting the rotating handle.

[0010] Furthermore, the magnets include two magnets, which are diagonally arranged at the two ends of the handle, so that the two magnets are farther apart, the adsorption is more firm and uniform, and the torque is symmetrical.

[0011] Furthermore, the magnets include ferrite magnets, and the diameter of each magnet is 2-5 mm, so that the magnetic force of the magnets is appropriate.

[0012] Furthermore, the key head is fixedly arranged on the handle, and the length of the key head protruding from the handle is 6-12 mm.

[0013] Furthermore, the key head includes a cylinder and a latch, the latch is arranged on the outer wall of the cylinder away from the handle, the handle is provided with a socket adapted to the cylinder, the cylinder is interference fit in the socket, the key head and the handle are easy to manufacture and simple to assemble.

[0014] Furthermore, the key head includes a cylinder and a latching tooth arranged on the outer wall of the cylinder, and a threaded hole is provided at one end of the cylinder close to the handle; the handle is provided with a blind hole adapted to the cylinder and an avoidance hole adapted to the latching tooth, the cylinder is inserted into the blind hole, and the latching tooth is inserted into the avoidance hole; the bottom wall of the blind hole is provided with a through hole adapted to the threaded hole; the handle also includes a bolt adapted to the threaded hole, the bolt passes through the through hole and is threadedly connected to the threaded hole, and the length of the key head extending out of the handle can be adjusted, so that the key can be suitable for high-voltage cabinets with different heights of the lock core of the vacuum circuit breaker baffle protruding from the cabinet panel.

[0015] Furthermore, the thickness of the handle is 10-20 mm, which facilitates the operation of turning the key with the handle and prevents the handle from being touched during power-off operation.

[0016] Furthermore, the gap between the key head and the key hole wall is no more than 1 mm, so that the key head fits the key hole.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The key has a magnet on the handle, which is adsorbed to the cabinet panel of the high-voltage cabinet during operation. When the operator rotates to open or close the baffle, it can be opened and stopped immediately, and closed and stopped immediately. This can prevent the baffle from rebounding, and can also prevent the key from falling due to problems such as the baffle rebound effect and the small operating angle. The operator can operate the trolley handle with both hands to eliminate safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To better understand the above and other objects, features, advantages, and functions of the present invention, reference may be made to the embodiments shown in the accompanying drawings. Like reference numerals in the accompanying drawings refer to like components. Those skilled in the art should understand that the accompanying drawings are intended to schematically illustrate preferred embodiments of the present invention and do not limit the scope of the present invention in any way, and that the components in the drawings are not drawn to scale.

[0020] Figure 1 This is a structural diagram of the first embodiment of the anti-drop key of the utility model.

[0021] Figure 2 This is a cross-sectional view of the first embodiment of the anti-drop key of the present invention when in use.

[0022] Figure 3 This is a structural diagram of the second embodiment of the anti-drop key of the utility model.

[0023] Figure 4 This is a cross-sectional view of the second embodiment of the anti-drop key of the present invention when in use.

[0024] In the figure: 1-key head; 11-cylinder; 12-tooth; 13-threaded hole; 2-handle; 21-magnet; 22-blind hole; 23-avoidance hole; 24-through hole; 25-bolt; 3-lock cylinder; 31-keyhole; 4-cabinet panel. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, exemplary embodiments of the present invention are described below in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to facilitate understanding. These details should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0026] In the description of this utility model, it should be noted that the term "including" and its variations represent open inclusion, that is, "including but not limited to." In addition, in the description of this utility model, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0027] The utility model provides a key for preventing the vacuum circuit breaker baffle of a high-voltage cabinet from falling off. Figures 1-4 As shown, the key head 1 and handle 2 are configured to fit within the keyhole 31 of the lock cylinder 3 of the vacuum circuit breaker baffle. Preferably, the gap between the key head 1 and the wall of the keyhole 31 is no greater than 1 mm, ensuring that the key head 1 fits snugly within the keyhole 31. After insertion, the gap is small and there is no looseness. This allows the key head 1 to be firmly secured within the keyhole 31, allowing the key to be turned stably to open and close the baffle, providing a first layer of protection against falling. The handle 2 is disposed at one end of the key head 1. A magnet 21 is disposed on the surface of the handle 2 facing the key head 1. The height of the magnet 21 corresponds to the height of the lock cylinder 3 of the vacuum circuit breaker baffle protruding from the cabinet panel 4. The magnet 21 can be secured to the surface of the handle 2 facing the key head 1 by inlaying, bonding, or other methods. It is understood that the height of the magnet 21 is the height of the magnet 21 protruding from the surface of the handle 2. For example, if the height of the lock cylinder 3 of the vacuum circuit breaker baffle protruding from the cabinet panel 4 is 2 mm, the height of the magnet 21 protruding from the surface of the handle 2 is set to 2 mm. When the key head 1 is inserted into the key hole 31 , the magnet 21 is attracted to the cabinet panel 4 of the high-voltage cabinet, thereby providing a second layer of protection against falling.

[0028] Specifically, refer to Figure 2 and Figure 4 As shown, when it is necessary to open the baffle of the vacuum circuit breaker of the high-voltage cabinet, the key head 1 is fully inserted into the keyhole 31. At this time, the handle 2 is against the surface of the lock core 3, and the magnet 21 is adsorbed on the cabinet panel 4 of the high-voltage cabinet. When the handle 2 is rotated to open the baffle, even if the operating angle is small, it can be opened and stopped immediately, which can prevent the baffle from rebounding and eliminate the key falling phenomenon caused by problems such as the baffle rebound effect and the small operating angle. The operator can operate the trolley crank with both hands to eliminate safety hazards. When closing the baffle, preferably, it can be closed by rotating the handle 2, so that it can be closed and stopped immediately, preventing the baffle from automatically rebounding and closing when the key is directly pulled out, causing structural wear and extending the service life of the baffle. After the operation is completed, the key is still adsorbed on the cabinet panel 4. There is no need to take the key off and place it on the insulating pad. When the next high-voltage cabinet is performing the power-off operation, the key can be directly removed from the previous high-voltage cabinet. The operation steps are simple and reduce the hidden dangers of electrical safety accidents caused by key falling.

[0029] A weak magnetic magnet 21 can be used, and the magnet 21 includes a plurality of magnets, and the magnetic force of each magnet 21 is set to 400-500 gauss. For example, the magnetic force of each magnet 21 can be set to 400 gauss, 410 gauss, 420 gauss, 430 gauss, 440 gauss, 450 gauss, 460 gauss, 470 gauss, 480 gauss, 490 gauss, 500 gauss, etc. Select a magnet 21 with appropriate magnetic force. The magnet 21 can be firmly adsorbed on the cabinet panel 4 to prevent the key from falling, while not affecting the difficulty of rotating the handle 2 due to excessive adsorption caused by excessive magnetic force. Preferably, the magnet 21 includes two, which are diagonally arranged at both ends of the handle 2, so that the two magnets 21 are far apart, the adsorption is more firm and uniform, and the torque is symmetrical. Specifically, the magnet 21 can use a ferrite magnet 21, which has low cost. The diameter of each magnet 21 is set to 2-5 mm, for example, it can be set to 2 mm, 3 mm, 4 mm, 5 mm, etc., so that the magnetic force of the magnet 21 is appropriate and the adsorption is firm.

[0030] In one embodiment, reference Figure 1 and Figure 2 As shown, the key head 1 is fixedly mounted on the handle 2 and has a simple structure. For example, the key head 1 can be fixedly mounted on the handle 2 by plugging, welding, bonding, or integral molding, and the like. This is not limited to any method, as long as the key head 1 and the handle 2 are firmly connected. The length of the key head 1 protruding from the handle 2 is 6-12 mm. For example, the length of the key head 1 protruding from the handle 2 can be set to 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, etc., to accommodate the depth of the keyhole 31 of the lock cylinder 3 of the baffle of most high-voltage cabinet vacuum circuit breakers.

[0031] In one embodiment, the key head 1 includes a cylinder 11 and a latch 12. The latch 12 is arranged on the outer wall of the cylinder 11 away from the handle 2. The handle 2 is provided with a socket adapted to the cylinder 11. The cylinder 11 is inserted into the socket by interference fit. The key head 1 and the handle 2 are easy to manufacture and simple to assemble.

[0032] In one embodiment, reference Figure 3 and Figure 4As shown, the key head 1 includes a cylinder 11 and a latch 12 disposed on the outer wall of the cylinder 11. A threaded hole 13 is provided at one end of the cylinder 11 near the handle 2. The handle 2 is provided with a blind hole 22 that matches the cylinder 11 and a relief hole 23 that matches the latch 12. The cylinder 11 is inserted into the blind hole 22, and the latch 12 is inserted into the relief hole 23. The bottom wall of the blind hole 22 is provided with a through hole 24 that matches the threaded hole 13. The cylinder 11 and the latch 12 can be inserted and removed along the blind hole 22 and the through hole 24, respectively, thereby adjusting the length of the key head 1 extending from the handle 2. The handle 2 also includes a bolt 25 that matches the threaded hole 13. The bolt 25 passes through the through hole 24 and is threadedly connected to the threaded hole 13, thereby connecting the key head 1 to the handle 2 via the bolt 25. In order to firmly connect the key head 1 and the handle 2, a plurality of bolts 25 may be used. For example, two or three bolts 25 may be used. Accordingly, a consistent number of threaded holes 13 and through holes 24 are provided.

[0033] The keyhole 31 of the lock core 3 of the vacuum circuit breaker baffle has the same structure as the models of high-voltage cabinets and vacuum circuit breakers, but the height of the protrusion from the cabinet panel 4 is different. In order to make the key suitable for most high-voltage cabinets, the height of the magnet 21 can be set to a higher height of the lock core 3 of the vacuum circuit breaker baffle protruding from the cabinet panel 4. When the height of the lock core 3 of the vacuum circuit breaker baffle of other high-voltage cabinets protruding from the cabinet panel 4 is less than the height of the magnet 21, the bolt 25 can be unscrewed, and the column 11 and the latch 12 can be pulled outward to lengthen the length of the portion of the key head 1 extending out of the handle 2. In this way, when the magnet 21 is adsorbed on the cabinet panel 4, the depth of the key head 1 inserted into the keyhole 31 can be ensured, so that the key head 1 and the keyhole 31 can still fit together and smoothly open the baffle, preventing the key head 1 from being inserted too shallowly and falling off.

[0034] Preferably, the thickness of the handle 2 is set to 10-20 mm. For example, the thickness of the handle 2 can be set to 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, etc. The thickness of the handle 2 is set appropriately to facilitate operation of the handle 2 when opening and closing the swing-in and swing-out baffle. At the same time, the length of the exposed portion of the key after insertion is reduced, which can prevent the operator from touching the handle 2 and knocking the key off during the power outage operation while wearing protective equipment such as insulating gloves, without affecting the operator's power outage operation.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A key for preventing the baffle of a vacuum circuit breaker in a high-voltage cabinet from falling off, characterized in that: It includes a key head and a handle, the key head is adapted to the keyhole of the lock core of the vacuum circuit breaker baffle; the handle is arranged at one end of the key head, and a magnet is provided on the surface of the handle facing the key head, and the height of the magnet is consistent with the height of the lock core of the vacuum circuit breaker baffle protruding from the cabinet panel.

2. The anti-drop key for the baffle of the vacuum circuit breaker of the switch high-voltage cabinet according to claim 1, characterized in that: The magnets include a plurality of magnets, and the magnetic force of each magnet is 400-500 Gauss.

3. The anti-drop key for the baffle of the vacuum circuit breaker of the switch high-voltage cabinet according to claim 2, characterized in that: The magnets include two magnets, which are diagonally arranged at the two ends of the handle.

4. The anti-drop key for the baffle of the vacuum circuit breaker of the switch high-voltage cabinet according to claim 2, characterized in that: The magnets include ferrite magnets, and each magnet has a diameter of 2-5 mm.

5. The anti-drop key for the baffle of the vacuum circuit breaker of the switch high-voltage cabinet according to claim 1, characterized in that: The key head is fixedly arranged on the handle, and the length of the key head protruding from the handle is 6-12 mm.

6. The anti-drop key for the baffle of the vacuum circuit breaker of the switch high-voltage cabinet according to claim 5, characterized in that: The key head includes a column and a latching tooth, wherein the latching tooth is arranged on the outer wall of the column away from the handle, and the handle is provided with a socket adapted to the column, and the column is inserted into the socket with an interference fit.

7. The anti-drop key for the baffle of the vacuum circuit breaker of the switch high-voltage cabinet according to claim 1, characterized in that: The key head includes a cylinder and a latching tooth arranged on the outer wall of the cylinder, and a threaded hole is provided at one end of the cylinder close to the handle; the handle is provided with a blind hole adapted to the cylinder and a avoidance hole adapted to the latching tooth, the cylinder is inserted into the blind hole, and the latching tooth is inserted into the avoidance hole; the bottom wall of the blind hole is provided with a through hole adapted to the threaded hole; the handle also includes a bolt adapted to the threaded hole, and the bolt passes through the through hole and is threadedly connected to the threaded hole.

8. The anti-drop key for the baffle of the vacuum circuit breaker of the switch high-voltage cabinet according to claim 1, characterized in that: The thickness of the handle is 10-20 mm.

9. The anti-drop key for the baffle of the vacuum circuit breaker of the switch high-voltage cabinet according to claim 1, characterized in that: The gap between the key head and the key hole wall is no more than 1 mm.

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