An electrical protection interlocking device for high voltage cabinet circuit breaker

Abstract

The present invention belongs to the technical field of circuit breakers, and in particular, relates to an electrical protection interlocking device for a high-voltage cabinet circuit breaker, comprising a first circuit breaker and a second circuit breaker mounted on a bottom plate, a mounting plate for mounting an adjustment assembly, and an adjustment assembly for toggling an operating handle; a first mounting plate and a second mounting plate are respectively provided on one side of the two circuit breakers where switches are set; the adjustment assembly comprises a driving motor, a first gear, a first rack, and a linkage plate; when the first gear rotates under the drive of the driving motor, it drives the first rack meshing with the first gear and the linkage plate fixed at the bottom of the first rack to move upward or downward, thereby toggling the switches of the first circuit breaker and the second circuit breaker at the same time. By setting an adjustment assembly, the present invention can quickly respond and drive the first gear, the first rack, the linkage plate and other components in an emergency, so as to realize the rapid closing of the two operating handles.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit breakers, and in particular relates to an electrical protection interlocking device for a high-voltage cabinet circuit breaker. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] A circuit breaker is a switching device that can close, carry and disconnect current under normal circuit conditions, and can close, carry and disconnect current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. The main function of a circuit breaker is to cut off and connect load circuits, as well as to cut off fault circuits to prevent accidents from expanding and ensure safe operation.

[0004] The safety interlock device is an automated device used for safety purposes. It uses mechanical or electrical mechanisms to make two actions have a mutually restrictive relationship. This device is widely used in the production process to ensure normal operation, achieve automatic control and prevent accidents. Among them, the electrical protection interlock device of the high-voltage cabinet circuit breaker is an interlock device that protects the high-voltage cabinet circuit breaker.

[0005] At present, the electrical protection interlocking device of the high-voltage cabinet circuit breaker in the prior art partially blocks the switch of one of the circuit breakers with a movable horizontal plate to prevent it from closing, and locks the horizontal plate for safety; however, each time the circuit is inspected or operated, the staff needs to use a special key to unlock it, and then move the horizontal plate to allow the circuit breaker to close or open. This process is relatively cumbersome, increasing the operation time and complexity; and the interlocking structure relies on a special key for operation. If the key is lost or damaged, normal interlock release and circuit breaker operation cannot be performed, which may lead to failure to respond in time in an emergency. Summary of the invention

[0006] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides an electrical protection interlocking device for a high-voltage cabinet circuit breaker.

[0007] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0008] A first aspect of the present invention provides an electrical protection interlocking device for a high-voltage cabinet circuit breaker, comprising a circuit breaker mounted on a base plate, a mounting plate for mounting an adjustment assembly, and an adjustment assembly for toggling an operating handle;

[0009] The circuit breaker comprises a first circuit breaker and a second circuit breaker which are arranged at intervals, and a first mounting plate and a second mounting plate are respectively provided on one side where the switches of the two circuit breakers are arranged; the adjustment assembly comprises a driving motor, a first gear, a first rack and a linkage plate;

[0010] The driving motor is fixed to the first mounting plate through a bracket, the first rack is vertically arranged on one side of the first mounting plate, and the bottom end is fixedly connected to the linkage plate; the linkage plate is slidably arranged on the mounting plate, and the two ends are respectively provided with clamping grooves for clamping the switches on the first circuit breaker and the second circuit breaker;

[0011] When the first gear is driven by the driving motor to rotate, it drives the first rack meshing with the first gear and the linkage plate fixed at the bottom of the first rack to move upward or downward, thereby simultaneously moving the operating handles of the first circuit breaker and the second circuit breaker.

[0012] One or more of the above technical solutions have the following beneficial effects:

[0013] (3) The present invention provides an electrical protection interlocking device for a high-voltage cabinet circuit breaker. By setting an adjustment component, in an emergency, the servo motor can quickly respond and drive the first gear, the first rack and the linkage plate and other components to quickly close the operating handle; this automated rapid response mechanism helps to reduce the possibility of accidents and quickly cut off the power supply when an accident occurs to reduce the escalation of the situation; automated control eliminates the need for operators to manually operate the operating handle, thereby simplifying the operating process and reducing work intensity.

[0014] (2) The present invention provides an electrical protection interlocking device for a high-voltage cabinet circuit breaker. When the left circuit breaker body is closed, the second gear, the second rack, etc. on the auxiliary component can automatically control the opening of the right operating handle, so that the right circuit breaker body can be put into use as a backup device. This design improves the redundancy and reliability of the system. Even if the left circuit breaker body fails, it can quickly switch to the backup device on the right to ensure continuous power supply to the power system, making the device more convenient to use.

[0015] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0017] Figure 1 This is an overall structural diagram of an electrical protection interlocking device for a high-voltage cabinet circuit breaker in Example 1.

[0018] Figure 2 This is a partial structural schematic diagram of an electrical protection interlocking device for a high-voltage cabinet circuit breaker in Example 1.

[0019] Figure 3 This is a structural diagram of the adjustment component of Example 1.

[0020] Figure 4 This is a structural diagram of the auxiliary component and the sliding component of Example 1.

[0021] Figure 5 for Figure 3 A magnified view of the structure in Figure 2.

[0022] Figure 6 This is a structural diagram of the rod assembly of Example 1.

[0023] In the figure, 1, base plate; 2, circuit breaker; 3, first mounting plate; 4, second mounting plate; 5, placement groove; 6, adjustment component; 61, servo motor; 62, first drive shaft; 63, first gear; 64, first rack; 65, connecting plate; 66, slider; 67, adjustment plate; 68, slide groove; 69, clamping groove; 7, operating handle; 8, threaded rod; 9, sliding plate; 10, slide plate; 12, support frame; 13, moving rod; 14, sliding groove 1; 15, sliding block 1; 16, auxiliary component; 161, second drive shaft; 162, second gear; 163, second rack; 164, limit frame; 165, second sliding block; 166, second sliding groove; 167, toggle rod; 17, L-shaped plate; 18, mounting hole; 19, fixing bolt; 20, plug rod component; 201, moving groove; 202, fixed plug rod; 203, spring. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] Embodiment 1

[0026] like Figure 1 , Figure 2 As shown, the present invention provides an electrical protection interlocking device for a high-voltage cabinet circuit breaker, comprising a base plate, a circuit breaker mounted on the base plate, a mounting plate for mounting an adjustment component, and an adjustment component for toggling an operating handle;

[0027] The circuit breaker 2 is arranged on the bottom plate 1, and an operating handle 7 is arranged on the circuit breaker 2. There are two circuit breakers, including a first circuit breaker (a circuit breaker arranged on the left side of the bottom plate 1) and a second circuit breaker (a circuit breaker arranged on the right side of the bottom plate 1) arranged at intervals on the bottom plate 1;

[0028] The mounting plate comprises a first mounting plate 3 and a second mounting plate 4, and the first mounting plate 3 and the second mounting plate 4 are respectively provided on one side where the two circuit breakers are provided with switches;

[0029] like Figure 3 As shown, the first mounting plate 3 is connected with an adjustment assembly 6, which includes a driving motor 61, a first gear 63, a first rack 64 and a linkage plate 67; the driving motor 61 is fixed to the first mounting plate 3 through a bracket, and the output end of the driving motor 61 is fixedly connected to the first gear 63 through a first driving shaft 62; the first gear 63 is meshed with the first rack 64, and the first rack 64 is vertically arranged on one side of the first mounting plate 3, and the bottom end is fixedly connected to the linkage plate 67; the linkage plate 67 is slidably arranged on the mounting plate, and the two ends are respectively provided with a clamping groove 69 for clamping the switches on the first circuit breaker and the second circuit breaker;

[0030] When the first gear 63 is driven by the driving motor 61 to rotate, it drives the first rack 64 meshing with the first gear 63 and the linkage plate 67 fixed at the bottom of the first rack 64 to move upward or downward, thereby simultaneously moving the operating handles of the first circuit breaker and the second circuit breaker.

[0031] As a further technical solution, the linkage plate 67 is a transverse telescopic structure, including a first adjustment plate on the left, a sliding plate 9 and a second adjustment plate on the right;

[0032] The first adjustment plate and the second adjustment plate have a clamping groove 69 at one end close to the operating handle 7, and the other end is connected through a sliding plate 9; and one end of the sliding plate 9 is fixedly arranged on the second adjustment plate, and the other end is slidably arranged inside the first adjustment plate;

[0033] A slider 66 is provided on the side of the first adjustment plate and the second adjustment plate facing the mounting plate; a connecting plate 65 protruding from the mounting plate is provided on the first mounting plate 3 and the second mounting plate 4, and a vertically arranged slide groove 68 is provided on the connecting plate 65. The slider 66 is slidably set in the slide groove 68 to limit the movement of the linkage plate 67.

[0034] The first adjustment plate on the first mounting plate 3 is fixedly connected with a first rack 64. When the first rack 64 moves up and down to a predetermined position, the first rack 64 drives the linkage plate 67 to open or close the operating handle 7.

[0035] When working, the servo motor 61 drives the first drive shaft 62 to rotate, the first drive shaft 62 drives the first gear 63 to rotate, and then the first gear 63 drives the first rack 64 to move up and down;

[0036] The first rack 64 drives the linkage plate 67 fixedly connected thereto to move upward, so that the adjustment plate located on the first mounting plate 3 and the second mounting plate 4 slides in the slide groove 68 on the connecting plate 65 through the slider 66, thereby driving the operating handle 7 clamped in the clamping groove 69 of the adjustment plate 67 to move upward; and move to a predetermined position, thereby closing the operating handle 7.

[0037] The present invention controls the first gear 63 to drive the first rack 64 to move and then controls the two operating handles 7 to close, thereby improving its safety; by setting the adjustment component 6, in an emergency, the servo motor 61 can quickly respond and drive the gear 1 63, the rack 1 64 and the linkage plate 67 and other components to achieve the rapid closing of the operating handle 7. This automatic rapid response mechanism helps to reduce the possibility of accidents, and quickly cuts off the power supply when an accident occurs to reduce the escalation of the situation; the automatic control makes it unnecessary for the operator to manually operate the operating handle, thereby simplifying the operation process and reducing the workload;

[0038] As a further technical solution, Figure 4 As shown, it also includes a sliding assembly for driving the second mounting plate 4 to move horizontally; the sliding assembly includes a threaded rod 8, a support rod 12 and a moving rod 13;

[0039] A threaded rod 8 is fixedly disposed on the other side of the first gear 63, and a moving rod 13 and a support rod 12 are sequentially disposed on the threaded rod 8. One end of the support rod 12 is rotatably connected to the threaded rod 8, and the other end is fixedly disposed on the bottom plate 1;

[0040] One end of the moving rod 13 is threadedly connected to the threaded rod, and the other end is provided with a first sliding block 15. The upper end of the second mounting plate 4 is provided with a transverse first sliding groove 14, and the first sliding block 15 is slidably arranged in the first sliding groove 14;

[0041] When the linkage plate 67 moves upward to close the first and second operating handles at the same time, the first gear 63 and the threaded rod 8 continue to rotate, so that the moving rod 13 moves toward the first gear 63, until the first sliding block 15 at the end of the moving rod 13 touches the end of the first sliding groove 14 on the second mounting plate 4, and then drives the second mounting plate 4 to move toward the first mounting plate 3. The movement principle of the second mounting plate 4 away from the first mounting plate 3 is the same, which will not be repeated here.

[0042] A sliding plate 10 is provided between the first mounting plate 3 and the second mounting plate 4 . One end of the sliding plate 10 is fixedly disposed on the first mounting plate 3 , and the other end of the sliding plate 10 is slidably disposed inside the second mounting plate 4 .

[0043] As a further technical solution, it also includes an auxiliary component 16 for independently moving the operating handle of the second circuit breaker when both the first circuit breaker and the second circuit breaker are closed;

[0044] The auxiliary component 16 includes: a second gear 162, a second rack 163, a limit frame 164 and a toggle block 167; the second gear 162 is fixedly arranged at the end of the threaded rod 8, and the first gear 63 drives the second gear 162 to rotate synchronously through the threaded rod 8;

[0045] It should be noted that a thread is provided in the middle of the threaded rod 8, and the end of the threaded rod 8 is connected to the second gear 162 through the drive shaft 161. The threaded rod 8, the first drive shaft 62 and the second drive shaft 161 are an integrally formed structure, the difference being that the surface of the drive shaft is a smooth structure.

[0046] The first drive shaft 62 and the second drive shaft 161 are respectively rotatably connected to the support rod 12; when working, the first drive shaft 62 and the second drive shaft 161 are supported and rotated on the support rod 12, so that the first drive shaft 62 and the second drive shaft 161 rotate more stably.

[0047] One end of the moving rod 13 is threadedly connected to the threaded rod 8 , and one end of the supporting rod 12 is rotatably connected to the second driving shaft 161 at the end of the threaded rod 8 .

[0048] The second gear 162 meshes with a second rack 163 vertically arranged on one side of the second mounting plate 4. The two sides of the second rack 163 are slidably connected to the limit frame 164, and the bottom end is fixedly connected to the toggle block 167; the limit frame 164 is fixedly arranged on the bottom plate 1 of the circuit breaker.

[0049] like Figure 5 As shown, second sliding grooves 166 are opened on both sides of the second rack 163, and a second sliding block 165 is slidably connected to the second sliding groove 166; the second sliding block 165 is fixedly connected to the limiting frame 164; a toggle rod 167 is fixedly connected to the bottom of the second rack 163; when working, the second rack 163 is driven by the second gear 162 to move upward, and then the second sliding groove 166 on the second rack 163 slides and guides the sliding block 165 on the limiting frame 164, so that the second rack 163 is more stable when moving.

[0050] When the two operating handles 7 need to be closed at the same time, the first gear 63 is driven to rotate by the driving motor 61, thereby driving the first rack 64 to move, and then driving the linkage plate 67 to move, so as to control the simultaneous closing of the two operating handles 7; when the operating handle 7 is at the top, it is closed, and when it is at the bottom, it is opened.

[0051] After the two operating handles 7 are closed at the same time, when the right operating handle 7 needs to be controlled to open separately, the driving motor 61 drives the first driving shaft 62, and the first driving shaft 62 drives the threaded rod 8 connected thereto to rotate, and the threaded rod 8 drives the moving rod 13 threadedly connected thereto to move, and then the moving rod 13 slides in the first sliding groove 14 through the first sliding block 15; when the first sliding block 15 slides to the top of the first sliding groove 14, the moving rod 13 continues to move on the threaded rod 8, and then the moving rod 13 drives the second mounting plate 4 to move toward the direction close to the first mounting plate 3 or away from the first mounting plate 3;

[0052] When the moving rod 13 drives the second mounting plate 4 to move toward the direction close to the first mounting plate 3, the second mounting plate 4 drives the sliding plate 10 to retract into the first mounting plate 3; at the same time, the sliding rod 9 at the end of the second adjustment plate on the second mounting plate 4 retracts into the first adjustment plate, thereby making the clamping groove 69 of the second adjustment plate on the second mounting plate 4 disengage from the right operating handle 7;

[0053] At the same time, the threaded rod 8 rotates on the support frame 12, driving the second gear 162 on the second driving shaft 161 to rotate, and then the second gear 162 drives the second rack 163 to move upward, and the second sliding block 165 on the limit frame 164 slides in the second sliding grooves 166 on both sides of the second rack 163, so that the second rack 163 moves upward; when it moves to the predetermined position, the toggle rod 167 at the bottom of the second rack 163 pulls the operating handle 7 on the right side of the bottom plate 1, so that when the right circuit breaker body 2 is used as a spare circuit breaker, it can be opened and used when the left circuit breaker body 2 is closed;

[0054] When the right operating handle 7 needs to be opened to close the left circuit breaker body, the toggle rod 167 on the auxiliary component 16 moves downward to drive the adjustment plate 67 to move downward, so that the tooth groove on the second rack 163 moves above the gear 1 63, and the gear 1 63 rotates to drive the slider 66 on the adjustment plate 67 to slide in the slide groove 68 on the connecting plate 65, thereby driving the right operating handle 7 to open;

[0055] The toggle rod 167 on the auxiliary component 16 can move downward and drive the adjustment plate 67 to move downward. During this process, the positional relationship between the tooth groove on the second rack 163 and the gear 1 63 changes, so that the gear 1 63 can rotate and drive the slider 66 to slide in the slide groove 68 of the connecting plate 65. This realizes the flexible switching from the left circuit breaker body 2 to the right circuit breaker body 2, thereby improving the flexibility and adaptability of the system.

[0056] When the left circuit breaker body 2 is closed, the second gear 162, the second rack 163, etc. on the auxiliary component 16 can automatically control the opening of the right operating handle 7, so that the right circuit breaker body 2 is put into use as a backup device, which improves the redundancy and reliability of the system. Even if the left circuit breaker body 2 fails, it can quickly switch to the backup device to ensure the continuous power supply of the power system, making the device more convenient to use.

[0057] As a further technical solution, the first mounting plate 3 is a rectangular plate with a placement groove 5 in the middle, and the circuit breaker 2 on the left side of the base plate 1 is arranged in the placement groove 5; the upper end of the rectangular plate is fixed to the base plate 1 by an L-shaped bending plate 17.

[0058] Specifically: five mounting holes 18 are opened on the L-shaped bending plate 17; the mounting holes 18 are internally threaded with fixing bolts 19; the first mounting plate 3 is fixed to the base plate 1 by the fixing bolts 19; the support rods 12 at both ends of the threaded rod 8 are fixed to the L-shaped bending plate 17 and the base plate 1 by bolts respectively.

[0059] During installation, the L-shaped bent plate 17 on the first mounting plate 3 is placed on the base plate 1, and then the fixing bolts 19 are passed through the mounting holes 18, and the fixing bolts 19 are tightened to fix the first mounting plate 3; the adjustment component 6 is installed on the L-shaped bent plate 17 by bolts. When the first mounting plate 3 and the adjustment component 6 need to be disassembled, the above-mentioned reverse operation can be performed, which is convenient for installing and disassembling the adjustment component 6 at any time.

[0060] As a further technical solution, Figure 6 As shown, it also includes a plunger assembly 20 disposed on the clamping groove at the end of the linkage plate 67, and the plunger assembly 20 is used to assist in fixing the operating handle of the first circuit breaker.

[0061] The plunger assembly 20 includes a plunger 202 and a spring 203. The spring 203 is sleeved on the plunger 202 and is arranged inside the upper end of the clamping groove of the linkage plate 67. The bottom of the fixed plunger 202 is plugged into the switch of the first circuit breaker.

[0062] Specifically: the first adjustment plate on the first mounting plate 3 is provided with an insertion rod assembly 20; the clamping groove at the end of the first adjustment plate is a U-shaped groove, and the opening of the U-shaped groove faces the operating handle 7; the adjustment plate at the upper end of the U-shaped groove is provided with a receiving groove 201 for installing a spring 203, and the spring 203 is fixed in the receiving groove 201; the lower end of the fixed insertion rod 202 passes through the receiving groove 201 and is plugged into the operating handle 7;

[0063] During operation, the fixed rod 202 is pulled up, and the fixed rod 202 slides in the accommodating groove 201, so that the fixed rod 202 on the adjustment plate 67 is separated from the gate 7 of the left circuit breaker body 2; during insertion, the fixed rod 202 is released, and the elastic force of the spring 203 is used to reset the fixed rod 202, so that the fixed rod 202 is inserted into the operating handle 7, so that the adjustment component 6 is more stable when the operating handle 7 is closed or opened, and the left operating handle 7 is reduced from separating from the adjustment plate 67 when opened or closed.

[0064] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. An electrical protection interlocking device for a high voltage cabinet circuit breaker, characterized in that: It comprises a circuit breaker mounted on a base plate (1), a mounting plate for mounting an adjustment component, and an adjustment component for toggling an operating handle; The circuit breaker comprises a first circuit breaker and a second circuit breaker which are arranged at intervals, and a first mounting plate (3) and a second mounting plate (4) are respectively provided on one side where the switches of the two circuit breakers are arranged; the adjustment component comprises a driving motor (61), a first gear (63), a first rack (64) and a linkage plate (67); The driving motor (61) is fixed to the first mounting plate (3) via a bracket; the first rack (64) is vertically arranged on one side of the first mounting plate (3), and the bottom end is fixedly connected to the linkage plate (67); the linkage plate (67) is slidably arranged on the mounting plate, and the two ends are respectively provided with clamping grooves (69) for clamping the switches on the first circuit breaker and the second circuit breaker; When the first gear (63) is driven by the driving motor (61) to rotate, it drives the first rack (64) meshing with the first gear (63) and the linkage plate (67) fixed at the bottom of the first rack (64) to move upward or downward, thereby simultaneously moving the operating handles of the first circuit breaker and the second circuit breaker.

2. The electrical protection interlocking device for a high-voltage cabinet circuit breaker according to claim 1 is characterized in that: The linkage plate (67) is a transversely retractable structure, comprising a first adjustment plate, a sliding plate (9) and a second adjustment plate; The first adjustment plate and the second adjustment plate have a clamping groove (69) at one end close to the operating handle, and the other end is connected via a sliding plate (9); one end of the sliding plate (9) is fixedly arranged on the second adjustment plate, and the other end is slidably arranged inside the first adjustment plate.

3. The electrical protection interlocking device for a high-voltage cabinet circuit breaker according to claim 2 is characterized in that: The first adjustment plate and the second adjustment plate are both provided with a slider (66) on one side facing the mounting plate; a vertical slide groove (68) is provided on the mounting plate, and the slider (66) is slidably arranged in the slide groove (68) to limit the movement of the linkage plate (67).

4. The electrical protection interlocking device for high-voltage cabinet circuit breaker according to claim 2 is characterized in that: It also includes a sliding assembly for driving the second mounting plate (4) to move horizontally; the sliding assembly includes a threaded rod (8) and a moving rod (13); the threaded rod (8) is fixedly connected to the first gear (63); one end of the moving rod (13) is threadedly connected to the threaded rod (8), and the other end is slidably arranged in a first sliding groove (14) horizontally opened on the second mounting plate (4) through a first sliding block (15); When the threaded rod (8) rotates driven by the first gear (63), it drives the moving rod (13) threadedly connected thereto to move along the threaded rod (8), thereby causing the first sliding block (15) at the end of the moving rod (13) to slide in the first sliding groove (14); when the first sliding block (15) slides to the top of the first sliding groove (14), the moving rod (13) continues to move on the threaded rod (8), thereby driving the second mounting plate (4) to move in a direction close to the first mounting plate (3) or away from the first mounting plate (3).

5. The electrical protection interlocking device for high-voltage cabinet circuit breaker according to claim 4 is characterized in that: A sliding plate (10) is provided between the first mounting plate (3) and the second mounting plate (4); one end of the sliding plate (10) is fixedly arranged on the first mounting plate (3), and the other end is slidably arranged inside the second mounting plate (4).

6. The electrical protection interlocking device for high-voltage cabinet circuit breaker according to claim 4, characterized in that: Also included is an auxiliary component for individually toggling the operating handle of the second circuit breaker when both the first circuit breaker and the second circuit breaker are closed; The auxiliary component comprises a second gear (162), a second rack (163), a limiting frame (164) and a toggle block (167); The second gear (162) is fixedly arranged at the end of the threaded rod (8), and the first gear (63) drives the second gear (162) to rotate synchronously through the threaded rod (8); the second gear (162) is meshed with a second rack (163) vertically arranged on one side of the second mounting plate (4), the second rack (163) is slidably connected to a limit frame (164) fixedly arranged on the bottom plate of the circuit breaker, and a toggle rod (167) is arranged at the bottom end of the second rack (163); Driven by the second gear (162), when the second rack (163) moves upward to a predetermined position, the toggle rod (167) at the bottom of the second rack (163) toggles the operating handle of the second circuit breaker, so that the second circuit breaker on the right side can be opened when the first circuit breaker on the left side is closed when the second circuit breaker on the right side is used as a backup circuit breaker.

7. The electrical protection interlocking device for high-voltage cabinet circuit breaker according to claim 6, characterized in that: Second sliding grooves (166) are provided on both sides of the second rack (163), and a second sliding block (165) is slidably provided in the second sliding groove (166); the second sliding block (165) is fixedly connected to the limiting frame (164); the second sliding block (165) on the limiting frame (164) slides in the second sliding grooves (166) on both sides of the second rack (163), thereby causing the second rack (163) to move upward.

8. The electrical protection interlocking device for high-voltage cabinet circuit breaker according to claim 1, characterized in that: It also includes a rod assembly (20) arranged on the clamping groove at the end of the linkage plate (67), and the rod assembly (20) is used to assist in fixing the operating handle of the first circuit breaker.

9. The electrical protection interlocking device for high-voltage cabinet circuit breaker according to claim 8, characterized in that: The plunger assembly (20) comprises an plunger (202) and a spring (203), wherein the spring (203) is sleeved on the plunger (202) and arranged inside the linkage plate (67); the bottom of the fixed plunger (202) is plugged into the operating handle of the first circuit breaker.

10. The electrical protection interlocking device for high-voltage cabinet circuit breaker according to claim 1, characterized in that: The first mounting plate (3) is a rectangular plate with a placement groove (5) in the middle, and the first circuit breaker on the base plate (1) is arranged in the placement groove (5); the upper end of the rectangular plate is fixed to the base plate (1) via an L-shaped bent plate (17).

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