Electrical lock for electrical maintenance

Abstract

The utility model discloses an electrical lock for electrical maintenance, which comprises a base, a swing rod and two vertical rods, the base is positioned below the middle of two circuit breakers needing interlocking control and is fixed on a distribution board or a wall, the middle part of the swing rod is rotatably connected with the base, two ends of the swing rod are respectively hinged with the lower ends of the two vertical rods, and the two vertical rods are fixed on the base. And the upper ends of the two vertical rods are rotationally connected with operating handles of the two circuit breakers needing interlocking control respectively. According to the utility model, interlocking control between the two circuit breakers is realized through the swing rod rotatably connected with the base and the two vertical rods, and the base and the swing rod are arranged below the circuit breakers, so that the problem that the existing electrical lock is difficult to install due to interference with other circuit breakers is well solved, the operation is very smooth, and the jamming phenomenon is avoided.

Description

Technical Field

[0001] The utility model relates to an electrical interlock for electrical maintenance, which can prevent maintenance personnel from accidental electric shock and belongs to the technical field of electrical equipment. Background Art

[0002] Electrical interlocking refers to the interlocking between various electrical equipment such as circuit breakers, switches, and cabinet doors in the power system. Installing corresponding anti-error electrical interlocking circuits can greatly reduce the misoperation of electrical equipment, thereby improving operational safety. When inspecting and repairing distribution facilities such as distribution boxes and distribution cabinets, in order to achieve interlocking protection, it is necessary to avoid causing two circuit breakers to operate in parallel. For example, when inspecting a lighting circuit, if the sub-circuit breaker and the main circuit breaker that control the lighting circuit are closed at the same time, it will cause electric shock to the operator. At this time, it is necessary to set an electrical interlock to make the sub-circuit breaker and the main circuit breaker that control the lighting circuit different in status.

[0003] A Chinese patent application with application number CN20222249320.0 discloses an electrical lock for electrical maintenance of a power plant, comprising a shell, a through hole is provided on the outer wall of the shell, a bearing is fixedly provided inside the through hole, a rotating shaft is rotatably provided on the bearing, one end of the rotating shaft passes through the bearing and is provided with a collar, a fixing hole is provided on the outer wall of the collar, a mounting hole is provided on the outer wall of the rotating shaft, a first screw is provided inside the fixing hole and the mounting hole, the collar and the rotating shaft are fixedly installed by the first screw, a connecting rod is fixedly provided on the outer wall of the collar and on both sides, a sliding groove is provided on one side of the connecting rod, a sliding rod is slidably provided inside the sliding groove, when a user moves one of the sliding rods upward, the sliding rod at the other end will move downward through the action of the bearing, so that the user can connect the two ends of the sliding rod to the handle switch on the circuit breaker body respectively through this principle to achieve the locking effect. Although the electrical interlock can prevent two circuit breakers from running in parallel, it must be installed between the two circuit breakers that need interlocking control. Since the main circuit breaker and multiple sub-circuit breakers in the distribution box are generally installed on the same horizontal track, other circuit breakers are often installed between the two circuit breakers that need interlocking control, making it impossible to install the electrical interlock. In addition, when the states of the two circuit breakers change, the distance between their handle switches changes, while the distance between the two rollers 18 connected to the handle switches of the two circuit breakers in the electrical interlock is fixed. When the handle switch of the circuit breaker is turned, it is inevitable that a jam will occur, so it is necessary to improve it. Utility Model Content

[0004] The utility model aims to provide an electrical lock for electrical maintenance in view of the drawbacks of the prior art, so as to solve the problems that the prior electrical lock is difficult to install and has unsmooth operation.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An electrical lock for electrical maintenance comprises a base, a swing arm and two vertical rods. The base is located below the middle of two circuit breakers that need interlocking control and is fixed on a distribution board or a wall. The middle part of the swing arm is rotatably connected to the base, the two ends of the swing arm are respectively hinged to the lower ends of the two vertical rods, and the upper ends of the two vertical rods are respectively rotatably connected to the operating handles of the two circuit breakers that need interlocking control.

[0007] The electrical interlock for electrical maintenance is provided with a bearing mounting hole at the front of the base, a bearing and a rotating shaft are installed inside the bearing mounting hole, the outer ring of the bearing is fixed in the bearing mounting hole, the inner ring is mounted on the rotating shaft, and the end of the rotating shaft is connected to the middle of the rocker arm.

[0008] The above-mentioned electrical lock for electrical maintenance, the swing arm includes a ring, a positioning pin, two sleeves and two telescopic rods, the ring is sleeved on the end of the rotating shaft and fixedly connected to the rotating shaft through the positioning pin, the two sleeves are coaxial with each other and are respectively fixed on both sides of the ring, one end of the two telescopic rods are respectively slid into the interior of the two sleeves and locked by screws, the other ends of the two telescopic rods are respectively hinged to the lower ends of the two vertical rods, and the upper ends of the two vertical rods are respectively rotatably connected to the operating handles of the two circuit breakers that need to be interlocked control.

[0009] The electrical interlock for electrical maintenance is provided with a plurality of positioning holes arranged along the length direction on the sleeve and the telescopic rod, and the screws are screwed into the positioning holes on the telescopic rod after passing through the positioning holes on the sleeve.

[0010] The electrical interlock for electrical maintenance is provided with a round hole at the upper end of the vertical rod, a rubber ring is provided in the round hole, and the rubber ring is sleeved on the operating handle of the circuit breaker.

[0011] The electrical interlock for electrical maintenance is provided with a lubrication hole connected to the bearing mounting hole on the top of the base, and a threaded column is threadedly connected to the inner wall of the lubrication hole.

[0012] The electrical interlock for electrical maintenance has connecting ears fixedly connected to the middle of both sides of the base, and the connecting ears are connected to the distribution board or the wall through bolts.

[0013] The utility model realizes interlocking control between two circuit breakers by means of a swing rod and two vertical rods rotatably connected to the base. The base and the swing rod are installed below the circuit breaker, which well solves the problem that the existing electrical lock is difficult to install due to interference with other circuit breakers. The operation is very smooth and there is no jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is an exploded view of the utility model.

[0017] The numbers in the figure are as follows: 1. Base; 2. Connecting ear; 3. Limiting hole; 4. Threaded column; 5. Lubrication hole; 6. Bearing mounting hole; 7. Bearing; 8. Rotating shaft; 9. Pin hole; 10. Locating pin; 11. Ring; 12. Articulated shaft; 13. Telescopic rod; 14. Vertical rod; 15. Rubber ring; 16. Operating handle; 17. Circuit breaker; 18. Locating hole; 19. Screw; 20. Sleeve. DETAILED DESCRIPTION

[0018] See also Figure 1 and Figure 2 The utility model comprises a base 1, a bearing 7, a rotating shaft 8, a swing rod and two vertical rods 14, wherein the swing rod comprises a collar 11, a positioning pin 10, two sleeves 20 and two telescopic rods 13.

[0019] A bearing mounting hole 6 is provided at the front of the base 1 , a bearing 7 and a rotating shaft 8 are installed inside the bearing mounting hole 6 , an outer ring of the bearing 7 is fixed in the bearing mounting hole 6 , and an inner ring is sleeved on the rotating shaft 8 .

[0020] The collar 11 is sleeved on the end of the rotating shaft 8. Pin holes 9 are provided on the end of the rotating shaft 8 and the outer wall of the collar 11. The positioning pin 10 is inserted into the pin holes 9 of both at the same time to fix the collar 11 and the rotating shaft 8 together.

[0021] The two sleeves 20 are coaxial and fixed on both sides of the ring 11 respectively. One ends of the two telescopic rods 13 are slidably inserted into the interior of the two sleeves 20 and locked by screws 19. The other ends of the two telescopic rods 13 are respectively hinged to the lower ends of the two vertical rods 14, and the upper ends of the two vertical rods 14 are respectively rotatably connected to the operating handles 16 of the two circuit breakers that need to be interlocked.

[0022] The sleeve 20 and the telescopic rod 13 are both provided with a plurality of positioning holes 18 arranged along the length direction. The screws 19 pass through the positioning holes 18 on the sleeve 20 and are screwed into the positioning holes 18 on the telescopic rod 13. By replacing the positioning holes 18, the length of the entire swing arm can be adjusted to adapt to circuit breakers at different distances.

[0023] A circular hole is provided at the upper end of the vertical rod 14 , in which a rubber ring 15 is provided. The rubber ring 15 is sleeved on an operating handle 16 of the circuit breaker to prevent the operating handle 16 from being worn.

[0024] A circular hole is provided at the lower end of the vertical rod 14 , and a circular hole is also provided at one end of the telescopic rod 13 away from the sleeve 20 . Both circular holes are penetrated by the hinge shaft 12 , so that the vertical rod 14 and the telescopic rod 13 are hinged.

[0025] Lubrication holes 5 communicating with the bearing mounting holes 6 are provided on both sides of the top of the base 1 , and threaded columns 4 are threadedly connected to the inner walls of the lubrication holes 5 .

[0026] The middle parts of both sides of the base 1 are fixedly connected with connecting ears 2, and the connecting ears 2 are provided with limiting holes 3, so that the base 1 can be fixed on the distribution board or the wall by bolts.

[0027] Working principle: When in use, the operator can first connect the rubber ring 15 at the upper end of the vertical rod 14 with the operating handle 16 on the circuit breaker 17. When the operator pushes the operating handle 16 on one of the circuit breakers 17 upward, the operating handle 16 rotates the swing arm around the rotating shaft 8 through the vertical rod 14 connected thereto, thereby driving the vertical rod 14 at the other end of the swing arm to move downward, and then driving the operating handle 16 on the other circuit breaker 17 to move downward. Similarly, if the operator pushes the operating handle 16 on one of the circuit breakers 17 downward, the operating handle 16 of the other circuit breaker moves upward. In this way, the two circuit breakers are always in different states. Due to the addition of the vertical rod 14, the base 1 and the swing arm are both installed below the circuit breaker (can also be installed above the circuit breaker), and will not interfere with other circuit breakers, and the installation is very convenient. Since the vertical rod 14 can rotate flexibly around the hinge shaft 12, when the states of the two circuit breakers 17 are switched, there will be no jamming due to the change in the distance between the operating handles 16, and the operation is very smooth.

[0028] When the distance between the two circuit breakers 17 is far, the user can first remove the screw 19, and then gradually pull the telescopic rod 13 out of the sleeve 20 for a distance so that the length of the entire swing arm is equal to the distance between the two circuit breakers 17, and then sleeve the rubber ring 15 and the operating handle 16, and finally screw the screw 19 into the positioning hole 18 to lock the telescopic rod 13 and the sleeve 20.

[0029] When the bearing 7 inside the bearing mounting hole 6 needs to be lubricated, the threaded column 4 can be unscrewed first, and then the lubricating oil is injected into the bearing mounting hole 6 through the lubrication hole 5, and then the threaded column 4 is screwed into the lubrication hole 5 to prevent dust from entering.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electrical interlock for electrical maintenance, characterized in that: The invention comprises a base (1), a swing arm and two vertical rods (14); the base (1) is located below the middle of two circuit breakers to be interlocked and fixed on a distribution board or a wall; the middle of the swing arm is rotatably connected to the base (1); the two ends of the swing arm are respectively hinged to the lower ends of the two vertical rods (14); and the upper ends of the two vertical rods (14) are respectively rotatably connected to the operating handles (16) of the two circuit breakers to be interlocked.

2. The electrical interlock for electrical maintenance according to claim 1, characterized in that: A bearing mounting hole (6) is provided at the front of the base (1), a bearing (7) and a rotating shaft (8) are mounted inside the bearing mounting hole (6), an outer ring of the bearing (7) is fixed in the bearing mounting hole (6), an inner ring is sleeved on the rotating shaft (8), and an end of the rotating shaft (8) is connected to the middle of the swing rod.

3. The electrical interlock for electrical maintenance according to claim 2, characterized in that: The swing arm comprises a collar (11), a positioning pin (10), two sleeves (20) and two telescopic rods (13); the collar (11) is sleeved on the end of the rotating shaft (8) and is fixedly connected to the rotating shaft (8) via the positioning pin (10); the two sleeves (20) are coaxial with each other and are respectively fixed on both sides of the collar (11); one end of the two telescopic rods (13) is respectively slidably inserted into the interior of the two sleeves (20) and is locked via screws (19); the other ends of the two telescopic rods (13) are respectively hinged to the lower ends of the two vertical rods (14).

4. The electrical interlock for electrical maintenance according to claim 3, characterized in that: The sleeve (20) and the telescopic rod (13) are both provided with a plurality of positioning holes (18) arranged along the length direction, and the screws (19) pass through the positioning holes (18) on the sleeve (20) and are then screwed into the positioning holes (18) on the telescopic rod (13).

5. The electrical interlock for electrical maintenance according to claim 4, characterized in that: A circular hole is provided at the upper end of the vertical rod (14), a rubber ring (15) is provided in the circular hole, and the rubber ring (15) is sleeved on an operating handle (16) of the circuit breaker.

6. The electrical interlock for electrical maintenance according to claim 5, characterized in that: A lubrication hole (5) communicating with the bearing mounting hole (6) is provided on the top of the base (1), and a threaded column (4) is threadedly connected to the inner wall of the lubrication hole (5).

7. An electrical interlock for electrical maintenance according to claim 6, characterized in that: Connecting ears (2) are fixedly connected to the middle of both sides of the base (1), and the connecting ears (2) are connected to the distribution board or the wall through bolts.

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