Locking structure for operating handle of high-voltage circuit breaker

Abstract

The utility model relates to the technical field of operating handle locking structures, and provides a high-voltage circuit breaker operating handle locking structure which comprises a mounting plate, a locking block used for abutting against an operating handle and a fixing mechanism used for fixing the locking block are arranged on the mounting plate, and the locking block is movably connected with the mounting plate. According to the technical scheme, the circuit breaker can be prevented from being switched on by the operating handle due to misoperation or other factors.

Description

Technical Field

[0001] The utility model relates to the technical field of operating handle locking structures, and in particular to a high-voltage circuit breaker operating handle locking structure. Background Art

[0002] High-voltage circuit breakers are essential switching devices used in power systems to control and protect power lines and equipment. They are typically used to disconnect and connect high-voltage circuits to prevent power system failures or damage. In the event of a system failure, high-voltage circuit breakers can quickly cut off the current, protecting equipment from damage.

[0003] During high-voltage circuit breaker operation, the operating handle is often used to control the circuit breaker's closing and opening states. For example, during maintenance, the operating handle is often moved to the "off" position, disconnecting subsequent circuits and enabling smooth repair and maintenance of electrical equipment. However, in actual operation, the circuit breaker's operating handle can accidentally move from the "off" position to the "on" position due to misoperation, external vibration, or other factors, causing the circuit to re-energize. This can lead to serious safety and electrical hazards, endangering the lives of workers and causing accidents. Utility Model Content

[0004] The utility model provides a locking structure for an operating handle of a high-voltage circuit breaker, which can prevent the operating handle from closing the circuit breaker due to misoperation or other factors.

[0005] The technical solution of the present invention is as follows: A high-voltage circuit breaker operating handle locking structure includes a mounting plate, on which is provided a locking block for resisting the operating handle and a fixing mechanism for fixing the locking block, and the locking block is movably connected to the mounting plate.

[0006] Furthermore, a bottom plate is provided at the bottom of the mounting plate, an accommodating space is formed between the bottom plate and the mounting plate, and the locking block is rotatably connected to a side wall of the accommodating space.

[0007] Furthermore, the fixing mechanism includes an extrusion block fixedly connected to the locking block, a slot arranged on the extrusion block, a clamping rod, and an elastic member that clamps the clamping rod and the slot. The extrusion block is rotatably connected to the inner wall of the accommodating space through a rotating shaft, and the clamping rod is clamped to the slot when the locking block is in a fixed state.

[0008] Furthermore, the cross section of the extrusion block is an arc-shaped structure, the cross section of the clamping slot is an arc-shaped structure, and the clamping rod is slidably connected to the extrusion block and the clamping slot.

[0009] Furthermore, both inner walls of the accommodating space close to the extrusion block are provided with sliding grooves, and the clamping rod is slidably connected to the inner walls of the sliding grooves.

[0010] Furthermore, the clamping rod is a cylindrical structure.

[0011] Furthermore, the elastic member includes a torsion spring, a first positioning rod, and a second positioning rod. The first positioning rod is arranged on the side of the accommodating space away from the locking block, and the second positioning rod is arranged on the side of the accommodating space close to the extrusion block. The torsion spring is sleeved on the first positioning rod, one end of the torsion spring abuts against the clamping rod, and the other end of the torsion spring abuts against the second positioning rod.

[0012] Furthermore, an annular positioning groove is provided on the outer surface of the clamping rod, and one end of the torsion spring abuts against the annular positioning groove.

[0013] Furthermore, the first positioning rod and the second positioning rod are both threadedly connected to the inner wall of the accommodating space.

[0014] Furthermore, one end of the rotating shaft extends to the outside of the mounting plate, and a handle is provided on the side of the rotating shaft away from the mounting plate.

[0015] The working principle and beneficial effects of the utility model are as follows:

[0016] This utility model provides a locking block and a fixing mechanism. When the circuit breaker is open, the operator can contact the locking block with the operating handle and fix it with the fixing mechanism, thereby preventing the circuit breaker from closing. This prevents maintenance personnel from accidentally moving the handle from the "off" position to the "on" position due to misoperation, external vibration, or other factors, ensuring that the circuit is not re-energized, thereby ensuring the safety of maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0018] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0020] Figure 3 for Figure 2 A in the middle is an enlarged schematic diagram;

[0021] Figure 4 This is a schematic diagram of the structure of the utility model Figure 3 , without mounting plate.

[0022] In the figure: 1. Mounting plate; 101. Locking block; 102. Bottom plate; 103. Accommodating space; 1031. Slide groove; 2. Connecting rod; 201. Extrusion block; 202. Rotating shaft; 203. Slot; 204. Annular positioning groove; 205. Handle; 3. Torsion spring; 301. First positioning rod; 302. Second positioning rod; 4. Support tube; 401. Bolt. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] refer to Figure 1-4 A locking structure for an operating handle of a high-voltage circuit breaker includes a mounting plate 1. The mounting plate 1 is in an "L"-shaped structure as a whole. A connection hole can be opened on the side of the mounting plate 1. When in use, the staff can connect it to the circuit breaker through bolts 401 or screws. The mounting plate 1 is provided with a locking block 101 for resisting the operating handle and a fixing mechanism for fixing the locking block 101. The locking block 101 is movably connected to the mounting plate 1. The connection between the locking block 101 and the mounting plate 1 can be a sliding connection or a rotating connection. Compared with the sliding connection, the contact area between the rotating connection locking block 101 and the mounting plate 1 is smaller, thereby reducing friction and reducing the occurrence of jamming. The reliability and service life of the locking block 101 under long-term use can be effectively improved.

[0025] Therefore, the present embodiment preferably rotates the locking block 101 to the mounting plate 1. Specifically, a base plate 102 is provided at the bottom of the mounting plate 1. The mounting plate 1 and the base plate 102 can be connected by a plurality of bolts 401. Each bolt 401 is provided at the four corners of the mounting plate 1 and the base plate 102 to enhance the stability of the connection. Secondly, a support tube 4 can be sleeved on the outer surface of the bolt 401, which is not threadedly connected to the bolt 401, and the support tube 4 is provided between the mounting plate 1 and the base plate 102. Sleeving the support tube 4 on the outer surface of the bolt 401 can block the external thread of the bolt 401, thereby improving the overall aesthetics of the locking structure. In addition, the presence of the support tube 4 prevents the mounting plate 1 or the base plate 102 from being uneven when the bolt 401 is connected, thereby ensuring the installation accuracy.

[0026] An accommodating space 103 is formed between the base plate 102 and the mounting plate 1, and the locking block 101 is pivotally connected to the sidewalls of the accommodating space 103. The provision of the base plate 102 allows the two ends of the locking block 101 to pivotally connect to the two sides of the accommodating space 103, enhancing the stability of the locking block 101 during movement. Furthermore, the pivoting connection design of the locking block 101 allows maintenance personnel to prevent the operating handle from closing by simply rotating the locking block 101 and securing it with a fixing mechanism, reducing operational complexity. Furthermore, the pivoting connection reduces the contact area between the locking block 101 and the mounting plate 1, thereby reducing friction and minimizing the occurrence of jamming. This effectively increases the service life of the locking block 101.

[0027] Specifically, the fixing mechanism includes an extrusion block 201 fixedly connected to the locking block 101, a slot 203 provided on the extrusion block 201, a connecting rod 2, and an elastic member for connecting the connecting rod 2 to the slot 203. The extrusion block 201 is rotatably connected to the inner wall of the accommodating space 103 via a rotating shaft 202. The extrusion block 201 can be integrally formed with the locking block 101. The extrusion block 201 is provided with at least one slot 203 that can be connected to the connecting rod 2, and when the locking block 101 is in a fixed state, the connecting rod 2 is connected to the slot 203. The number of slots 203 can be multiple. In this embodiment, two slots 203 are preferably provided, wherein the first slot 203 is used to fix the locking block 101 in the accommodating space 103, and the second slot 203 is used to fix the locking block 101 by the connecting rod 2 when the locking block 101 contacts the operating handle.

[0028] During use, maintenance personnel can rotate the shaft 202 counterclockwise to rotate the locking block 101 out of the accommodating space 103. At the same time, the extruding block 201 will rotate along with the shaft 202. When the locking block 101 contacts the operating handle, the locking groove 203 on the extruding block 201 will correspond to the position of the connecting rod 2. Under the action of the elastic member, the connecting rod 2 will snap into the locking groove 203, thereby fixing the locking block 101 and preventing it from rotating.

[0029] When using the locking mechanism in this embodiment, maintenance personnel only need to rotate the rotating shaft 202 and the locking block 101 to the designated position to automatically secure the device. This requires no additional operation, further enhancing operational convenience. Furthermore, anti-slip grooves can be added to the inner wall of the slot 203 to increase the contact area between the slot 203 and the connecting rod 2. This can reduce the possibility of the connecting rod 2 slipping or disengaging due to vibration or external forces, thereby improving the stability and reliability of the locking structure.

[0030] In order to facilitate maintenance personnel to rotate the shaft 202, one end of the shaft 202 is extended to the outside of the mounting plate 1, and a handle 205 is provided on the side of the shaft 202 away from the mounting plate 1. By providing the handle 205, maintenance personnel can more easily apply force to the shaft 202, thereby facilitating the rotation of the shaft 202 and enhancing the comfort of operation.

[0031] Secondly, to facilitate maintenance personnel in releasing the locking block 101 from its fixed state, the cross-section of the extrusion block 201 is designed to have an arc-shaped structure, and the cross-section of the locking slot 203 is designed to have an arc-shaped structure. The clamping rod 2 is slidably connected to the extrusion block 201 and the locking slot 203. When maintenance personnel need to unlock the locking block 101, they can rotate the handle 205 clockwise. The handle 205 will drive the extrusion block 201 to rotate clockwise, and the extrusion block 201 will also push the locking slot 203 to rotate. Because the cross-section of the locking slot 203 is arc-shaped, the side of the locking slot 203 will gradually push the clamping rod 2 to compress the elastic member, causing the clamping rod 2 to disengage from the locking slot 203, thereby releasing the fixation. The maintenance personnel only need to overcome the force of the elastic member to release the locking block 101, without the need for additional complex operations, further improving the convenience of operation.

[0032] In addition, to prevent the connecting rod 2 from being offset or misplaced during movement, a slide groove 1031 is provided on both sides of the inner wall of the accommodating space 103 near the extrusion block 201, and the connecting rod 2 is slidably connected to the inner wall of the slide groove 1031. The provided slide groove 1031 can limit the degree of freedom of the connecting rod 2, so that it can only move along the inner wall of the slide groove 1031, thereby preventing it from being offset or misplaced during movement, and ensuring the accuracy of the corresponding position of the connecting rod 2 and the slot 203. Secondly, to reduce the risk of the connecting rod 2 getting stuck during sliding, the connecting rod 2 is designed to have a cylindrical structure. The cylindrical structure of the connecting rod 2 can reduce the contact area between the connecting rod 2 and the slide groove 1031, ensuring that the connecting rod 2 moves more smoothly within the slide groove 1031, thereby improving the service life of the locking mechanism and the reliability of operation.

[0033] In this embodiment, the elastic member includes a torsion spring 3, a first positioning rod 301, and a second positioning rod 302. The first positioning rod 301 is arranged on the side of the accommodating space 103 away from the locking block 101, and the second positioning rod 302 is arranged on the side of the accommodating space 103 close to the extrusion block 201. The torsion spring 3 is sleeved on the first positioning rod 301, and one end of the torsion spring 3 abuts the clamping rod 2, and the other end of the torsion spring 3 abuts the second positioning rod 302 (abutment means that the two are only in contact and not fixedly connected). The torsion spring 3 generally stores and releases energy by twisting around its axis. This method requires less space in the axial direction than a cylindrical compression spring. Therefore, the use of the torsion spring 3 can effectively save the longitudinal space of the device and maintain the compactness of the entire locking structure.

[0034] In this embodiment, an annular positioning groove 204 is provided on the outer surface of the clamping rod 2, and one end of the torsion spring 3 abuts against the annular positioning groove 204. By providing an annular positioning groove 204 on the outer surface of the sliding rod, the torsion spring 3 can be more stably abutted against the sliding rod, thereby providing a stronger positioning effect during the resetting process, and further improving the reliability of the fixing mechanism.

[0035] Secondly, the elasticity of the torsion spring 3 may degrade over time due to prolonged use. To facilitate maintenance personnel replacing the torsion spring 3, both the first and second positioning rods 301, 302 are threadedly connected to the inner wall of the accommodating space 103. When maintenance personnel need to replace the torsion spring 3, they first unscrew the first and second positioning rods 301, 302. Since the torsion spring 3 is mounted on the first positioning rod 301, the maintenance personnel can remove the old torsion spring 3. Next, they select a torsion spring 3 of the same specifications and screw the end face of the first positioning rod 301 into the accommodating space 103 from the bottom of the base plate 102. The height does not need to be too high. Then, they mount the torsion spring 3 on one end of the first positioning rod 301 on the accommodating space 103. Once the torsion spring 3 is mounted on the first positioning rod 301, screw the first positioning rod 301 fully into the accommodating space 103, with one end connected to the mounting plate 1. The torsion spring 3 is then rotated until one end of the torsion spring 3 contacts the annular positioning groove 204. Finally, the second positioning rod 302 is screwed into the accommodating space 103 , so that the other end of the torsion spring 3 contacts the second positioning rod 302 and the torsion spring 3 is in a torsion state.

[0036] When the torsion spring 3 needs to be replaced, it is not necessary to remove the mounting plate 1 and the base plate 102. Instead, the first positioning rod 301 and the second positioning rod 302 are removed to complete the replacement of the torsion spring 3. This reduces the complexity of the operation and improves the efficiency of the staff in replacing the torsion spring 3.

[0037] Working principle;

[0038] During operation, maintenance personnel grasp handle 205 with one hand and rotate it counterclockwise. Handle 205 drives shaft 202 to rotate counterclockwise, which in turn drives extrusion block 201 to rotate counterclockwise, causing locking block 101 to rotate out of its accommodating space 103. Simultaneously, extrusion block 201 rotates with shaft 202, its side surface compressing connecting rod 2, causing it to move within slot 1031 and, in turn, deforming torsion spring 3. When locking block 101 contacts the operating handle, slot 203 on extrusion block 201 aligns with connecting rod 2, causing torsion spring 3 to recover its original shape. One end of torsion spring 3 then engages connecting rod 2 in slot 203, securing locking block 101 and preventing rotation. This prevents the handle from accidentally moving from the "off" position to the "on" position due to misoperation, external vibration, or other factors, preventing the circuit from being re-energized and ensuring the safety of maintenance personnel.

[0039] To unlock the lock, the operator rotates handle 205 clockwise. This causes the extrusion block 201 to rotate clockwise, which in turn rotates the locking slot 203. Because the locking slot 203 has an arc-shaped cross-section, the side surfaces of the locking slot 203 gradually push against the connecting rod 2, compressing the elastic element and releasing the connecting rod 2 from the locking slot 203.

[0040] The above are only preferred embodiments of the present invention and are 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 high-voltage circuit breaker operating handle locking structure, comprising a mounting plate (1), characterized in that: The mounting plate (1) is provided with a locking block (101) for resisting the operating handle and a fixing mechanism for fixing the locking block (101); the locking block (101) is movably connected to the mounting plate (1).

2. A high-voltage circuit breaker operating handle locking structure according to claim 1, characterized in that: A bottom plate (102) is provided at the bottom of the mounting plate (1), an accommodating space (103) is formed between the bottom plate (102) and the mounting plate (1), and the locking block (101) is rotatably connected to the side wall of the accommodating space (103).

3. A high-voltage circuit breaker operating handle locking structure according to claim 2, characterized in that: The fixing mechanism comprises an extrusion block (201) fixedly connected to the locking block (101), a clamping groove (203) provided on the extrusion block (201), a clamping rod (2), and an elastic member for clamping the clamping rod (2) and the clamping groove (203); the extrusion block (201) is rotatably connected to the inner wall of the accommodating space (103) via a rotating shaft (202), and the clamping rod (2) and the clamping groove (203) are clamped when the locking block (101) is in a fixed state.

4. A high-voltage circuit breaker operating handle locking structure according to claim 3, characterized in that: The cross section of the extrusion block (201) is an arc-shaped structure, the cross section of the clamping slot (203) is an arc-shaped structure, and the clamping rod (2) is slidably connected to the extrusion block (201) and the clamping slot (203).

5. A high-voltage circuit breaker operating handle locking structure according to claim 4, characterized in that: The inner walls of both sides of the accommodating space (103) close to the extrusion block (201) are provided with sliding grooves (1031), and the clamping rod (2) is slidably connected to the inner walls of the sliding grooves (1031).

6. A high-voltage circuit breaker operating handle locking structure according to claim 5, characterized in that: The clamping rod (2) is in a cylindrical structure.

7. The high-voltage circuit breaker operating handle locking structure according to claim 3, characterized in that: The elastic member comprises a torsion spring (3), a first positioning rod (301), and a second positioning rod (302); the first positioning rod (301) is arranged on a side of the accommodating space (103) away from the locking block (101); the second positioning rod (302) is arranged on a side of the accommodating space (103) close to the extrusion block (201); the torsion spring (3) is sleeved on the first positioning rod (301); one end of the torsion spring (3) abuts against the clamping rod (2); and the other end of the torsion spring (3) abuts against the second positioning rod (302).

8. The high-voltage circuit breaker operating handle locking structure according to claim 7, characterized in that: An annular positioning groove (204) is provided on the outer surface of the clamping rod (2), and one end of the torsion spring (3) abuts against the annular positioning groove (204).

9. The high-voltage circuit breaker operating handle locking structure according to claim 7, characterized in that: The first positioning rod (301) and the second positioning rod (302) are both threadedly connected to the inner wall of the accommodating space (103).

10. The high-voltage circuit breaker operating handle locking structure according to claim 5, characterized in that: One end of the rotating shaft (202) extends to the outside of the mounting plate (1), and a handle (205) is provided on the side of the rotating shaft (202) away from the mounting plate (1).

Images