Ground wire device for low-voltage comprehensive distribution box

Abstract

The utility model provides a grounding wire device for a low-voltage comprehensive distribution box, which relates to the technical field of distribution boxes and comprises a U-shaped frame, a first clamping block in sliding contact with the inner bottom wall of the U-shaped frame and a second clamping block fixedly connected to the inner bottom wall of the U-shaped frame. According to the grounding wire device for the low-voltage comprehensive distribution box, a second limiting toothed plate can be extruded through movement of a first limiting toothed plate, the second limiting toothed plate can extrude a first telescopic spring, and the second limiting toothed plate and the first limiting toothed plate can be clamped under the action of elastic force, so that a grounding wire can be clamped and fixed; and when the clamping force of the grounding wire is too large, an arc-shaped plate can push a second sliding rod to move, the second sliding rod can extrude a second telescopic spring through a sliding plate, and the second telescopic spring is buffered by utilizing the generated elastic force, so that the safety of the grounding wire is ensured. And the problem that the grounding wire is damaged due to too large clamping force is avoided.

Description

Technical Field

[0001] The utility model relates to a grounding wire device, specifically a grounding wire device for a low-voltage comprehensive distribution box, belonging to the technical field of distribution boxes. Background Technique

[0002] The low-voltage substation area comprehensive distribution box is a commonly used power distribution equipment in the recent substation area comprehensive transformation, which standardizes the installation and wiring of low-voltage power distribution equipment, and concentrates all low-voltage equipment (low-voltage busbars, low-voltage switches, knife switches, reactive power compensation devices, etc.) in the comprehensive distribution box, avoiding the exposure of low-voltage power distribution equipment, making the substation area safe and beautiful. For the convenience of installation in the substation area, the volume of the low-voltage comprehensive distribution box cannot be too large. Therefore, the currently operating low-voltage comprehensive distribution boxes generally have the characteristics of narrow internal space and compact installation of low-voltage equipment.

[0003] A grounding wire device for a low-voltage comprehensive distribution box disclosed in the Chinese Patent Application Publication Specification CN214280222U drives a second screw to move left by rotating a first screw to the right, so that a rod pulls a moving clamp head to move towards the static clamp head, and the clamp heads bite. Rotating the first screw to the left drives the second screw to move right, so that the rod pushes the moving clamp head to move away from the static clamp head, and the clamp heads loosen. The biting, opening and closing of the clamp heads are controlled by rotating a handle. Rotating to the left loosens the clamp heads, and rotating to the right bites the clamp heads. The inner side of the clamp heads is increased with a corrugated design, which can increase the friction force when biting the three-phase wires. The device has a compact structure, small occupied space, convenient operation, and greatly guarantees the personal safety of operators.

[0004] In the above patent solution, the gears on the first screw are engaged with the gear grooves on the second screw to drive the clamp heads to clamp the grounding wire. Since the gears and the gear grooves cannot achieve self-locking, if there are external vibration sources in the building or installation location where the low-voltage comprehensive distribution box is located, such as nearby mechanical equipment, traffic vibration, and ground vibration, these vibrations will act on the low-voltage comprehensive distribution box, causing it to vibrate. These vibrations may cause the second screw to move, resulting in the clamp heads losing the clamping force on the grounding wire, easily causing the grounding wire to fall off, increasing the electric shock and safety risks of operators, and it is difficult for the device to control the clamping force on the grounding wire, easily resulting in the problem of the grounding wire being damaged due to excessive clamping force. Content of the Utility Model

[0005] The utility model provides a grounding wire device for a low-voltage comprehensive distribution box, which can stably clamp the grounding wire, avoid the situation of the grounding wire falling off, and can also prevent the grounding wire from being broken due to excessive clamping force.

[0006] The present utility model is realized through the following technical solutions: A grounding wire device for a low-voltage comprehensive distribution box, comprising a U-shaped frame, a first clamping block slidably contacting the inner bottom wall of the U-shaped frame, and a second clamping block fixedly connected to the inner bottom wall of the U-shaped frame. A limiting mechanism and a buffer assembly are provided on the second clamping block.

[0007] The limiting mechanism includes a first limiting tooth plate fixed on the side of the first clamping block close to the second clamping block and an L-shaped plate fixed on the upper surface of the second clamping block. A first sliding rod is slidably connected to the inner wall of the hole on the upper surface of the L-shaped plate. A second limiting tooth plate is fixed to the bottom end of the first sliding rod, and the second limiting tooth plate can be engaged with the first limiting tooth plate. A limiting block is fixed to the top end of the first sliding rod, and a first telescopic spring is sleeved on the outer surface of the first sliding rod.

[0008] Furthermore, a limiting rod is fixed to the upper surface of the second limiting tooth plate, and the top end of the limiting rod penetrates through the L-shaped plate and extends above the L-shaped plate.

[0009] Furthermore, the buffer assembly includes a first sliding groove opened on the second clamping block. A sliding plate is slidably connected to the inner wall of the first sliding groove. A second telescopic spring is arranged inside the first sliding groove. A second sliding rod is fixed to the side of the sliding plate away from the second telescopic spring, and one end of the second sliding rod penetrates through the second clamping block and extends to the outside of the second clamping block. An arc-shaped plate is fixed to the end of the second sliding rod located outside the second clamping block.

[0010] Furthermore, a threaded rod is rotatably connected to the side of the first clamping block away from the second clamping block, and the outer surface of the threaded rod is threadedly connected to the inner wall of the hole on one side of the U-shaped frame. A turning handle is fixed to the end of the threaded rod away from the first clamping block.

[0011] Furthermore, a second sliding groove is opened on the inner bottom wall of the U-shaped frame. A third sliding rod is fixed to the inner wall of the second sliding groove. A sliding block is slidably connected to the outer surface of the third sliding rod, and the outer surface of the sliding block is in sliding contact with the inner wall of the second sliding groove. The upper surface of the sliding block is fixed to the bottom surface of the first clamping block.

[0012] Furthermore, anti-slip lines are provided on the arc-shaped plate, and an arc-shaped groove is opened on the first clamping block, and the diameter of the arc-shaped groove is the same as the inner diameter of the arc-shaped plate.

[0013] The present utility model provides a grounding wire device for a low-voltage comprehensive distribution box, and the beneficial effects thereof are as follows:

[0014] 1. The grounding wire device for the low-voltage integrated distribution box can drive the first clamping block to move by rotating the threaded rod. The movement of the first clamping block can drive the first limit tooth plate to move. The movement of the first limit tooth plate can squeeze the second limit tooth plate, and the second limit tooth plate will squeeze the first telescopic spring to generate elastic force. Under the action of the elastic force of the first telescopic spring, the second limit tooth plate can be clamped with the first limit tooth plate, so as to clamp and fix the grounding wire and avoid the problem that the grounding wire falls off and affects the safety of operators.

[0015] 2. For the grounding wire device for the low-voltage integrated distribution box, when the clamping force on the grounding wire is too large, the arc-shaped plate will push the second sliding rod to move. The second sliding rod can drive the sliding plate to squeeze the second telescopic spring to generate elastic force, and the elastic force can be used for buffering to avoid the problem that the grounding wire is damaged due to excessive clamping force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 2 is a cross-sectional schematic diagram of the U-shaped frame in the present utility model;

[0018] Figure 3 is a cross-sectional schematic diagram of the second clamping block in the present utility model;

[0019] Figure 4 is of the present utility model Figure 2 magnified schematic diagram of the structure at A.

[0020] DESCRIPTION OF THE REFERENCE NUMERALS

[0021] 1. U-shaped frame;

[0022] 2. Limit mechanism; 201. L-shaped plate; 202. First limit tooth plate; 203. First sliding rod; 204. Second limit tooth plate; 205. First telescopic spring; 206. Limit block;

[0023] 3. Buffer assembly; 301. Arc-shaped plate; 302. Second sliding rod; 303. First chute; 304. Sliding plate; 305. Second telescopic spring;

[0024] 4. First clamping block; 5. Second clamping block; 6. Arc-shaped groove; 7. Threaded rod; 8. Rotating handle; 9. Anti-slip pattern; 10. Second chute; 11. Third sliding rod; 12. Slide block; 13. Limit rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4, an embodiment of the present utility model provides a grounding wire device for a low-voltage integrated distribution box, which includes a U-shaped frame 1, a first clamping block 4 slidably contacting the inner bottom wall of the U-shaped frame 1, and a second clamping block 5 fixedly connected to the inner bottom wall of the U-shaped frame 1. An arc-shaped groove 6 is formed on the first clamping block 4, and a limiting mechanism 2 and a buffer assembly 3 are provided on the second clamping block 5.

[0026] One side of the first clamping block 4 away from the second clamping block 5 is rotatably connected to a threaded rod 7, and the outer surface of the threaded rod 7 is threadedly connected to the inner wall of the hole on one side of the U-shaped frame 1. One end of the threaded rod 7 away from the first clamping block 4 is fixed with a turning handle 8.

[0027] Please refer specifically to Figure 1 and Figure 4 , the limiting mechanism 2 includes a first limiting tooth plate 202 fixed on the side of the first clamping block 4 close to the second clamping block 5 and an L-shaped plate 201 fixed on the upper surface of the second clamping block 5. The inner wall of the hole on the upper surface of the L-shaped plate 201 is slidably connected to a first sliding rod 203. A second limiting tooth plate 204 is fixed to the bottom end of the first sliding rod 203, and the second limiting tooth plate 204 can be engaged with the first limiting tooth plate 202. A limiting block 206 is fixed to the top end of the first sliding rod 203, and a first telescopic spring 205 is sleeved on the outer surface of the first sliding rod 203. The second limiting tooth plate 204 is located above the first limiting tooth plate 202. The bottom surface of the first limiting tooth plate 202 is parallel to the upper surface of the first clamping block 4. The distance between the second limiting tooth plate 204 and the upper surface of the first clamping block 4 is less than the height of the first limiting tooth plate 202.

[0028] A limiting rod 13 is fixed to the upper surface of the second limiting tooth plate 204, and the top end of the limiting rod 13 penetrates through the L-shaped plate 201 and extends above the L-shaped plate 201.

[0029] By rotating the threaded rod 7, the first clamping block 4 can be driven to move. The movement of the first clamping block 4 can drive the first limiting tooth plate 202 to move along the upper surface of the second clamping block 5. The movement of the first limiting tooth plate 202 can squeeze the second limiting tooth plate 204, and the second limiting tooth plate 204 will squeeze the first telescopic spring 205 to generate elastic force. Under the action of the elastic force of the first telescopic spring 205, the second limiting tooth plate 204 can be engaged with the first limiting tooth plate 202, so as to clamp and fix the grounding wire, avoiding the problem that the grounding wire falls off and affects the safety of operators.

[0030] Please refer specifically to Figure 3, the buffer assembly 3 includes a first sliding groove 303 formed in the second clamping block 5. A sliding plate 304 is slidably connected to the inner wall of the first sliding groove 303. A second telescopic spring 305 is provided inside the first sliding groove 303. A second sliding rod 302 is fixed to the side of the sliding plate 304 away from the second telescopic spring 305. One end of the second sliding rod 302 penetrates through the second clamping block 5 and extends to the outside of the second clamping block 5. An arc-shaped plate 301 is fixed to the end of the second sliding rod 302 located outside the second clamping block 5. Anti-slip lines 9 are provided on the arc-shaped plate 301. The diameter of the arc-shaped groove 6 is the same as the inner diameter of the arc-shaped plate 301.

[0031] When the clamping force of the first clamping block 4 on the grounding wire is too large, the grounding wire will push the arc-shaped plate 301 to move. The arc-shaped plate 301 will push the second sliding rod 302 to move. The second sliding rod 302 can drive the sliding plate 304 to squeeze the second telescopic spring 305 to generate elastic force. The elastic force can be used for buffering to avoid the problem of damage to the grounding wire caused by excessive clamping force.

[0032] Please refer to Figure 2 , a second sliding groove 10 is formed in the inner bottom wall of the U-shaped frame 1. A third sliding rod 11 is fixed to the inner wall of the second sliding groove 10. A slider 12 is slidably connected to the outer surface of the third sliding rod 11. The outer surface of the slider 12 is in sliding contact with the inner wall of the second sliding groove 10. The upper surface of the slider 12 is fixed to the bottom surface of the first clamping block 4.

[0033] Working principle: When in use, place the grounding wire between the arc-shaped groove 6 and the arc-shaped plate 301 and then rotate the threaded rod 7. By rotating the threaded rod 7, the first clamping block 4 can be driven to move. The movement of the first clamping block 4 can drive the first limit tooth plate 202 to move along the upper surface of the second clamping block 5. The movement of the first limit tooth plate 202 can squeeze the second limit tooth plate 204. The second limit tooth plate 204 will squeeze the first telescopic spring 205 to generate elastic force. Under the action of the elastic force of the first telescopic spring 205, the second limit tooth plate 204 can be engaged with the first limit tooth plate 202, so as to clamp and fix the grounding wire and avoid the problem that the grounding wire falls off and affects the safety of the operator. When the clamping force of the first clamping block 4 on the grounding wire is too large, the grounding wire will push the arc-shaped plate 301 to move. The arc-shaped plate 301 will push the second sliding rod 302 to move. The second sliding rod 302 can drive the sliding plate 304 to squeeze the second telescopic spring 305 to generate elastic force. The elastic force can be used for buffering to avoid the problem of damage to the grounding wire caused by excessive clamping force.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed for the present utility model is defined by the appended claims and their equivalents.

Claims

1. A grounding wire device for a low-voltage integrated distribution box, comprising a U-shaped frame (1), a first clamping block (4) in sliding contact with an inner bottom wall of the U-shaped frame (1), and a second clamping block (5) fixedly connected to the inner bottom wall of the U-shaped frame (1), characterized in that: The second clamping block (5) is provided with a limiting mechanism (2) and a buffer assembly (3); The limiting mechanism (2) comprises a first limiting tooth plate (202) fixed to a side of the first clamping block (4) close to the second clamping block (5) and an L-shaped plate (201) fixed to the upper surface of the second clamping block (5); the inner wall of a hole on the upper surface of the L-shaped plate (201) is slidably connected to a first sliding rod (203); a second limiting tooth plate (204) is fixed to the bottom end of the first sliding rod (203), and the second limiting tooth plate (204) can be engaged with the first limiting tooth plate (202); a limiting block (206) is fixed to the top end of the first sliding rod (203); and a first telescopic spring (205) is sleeved on the outer surface of the first sliding rod (203).

2. The grounding wire device for a low-voltage integrated distribution box according to claim 1 is characterized in that: A limiting rod (13) is fixed on the upper surface of the second limiting tooth plate (204), and the top end of the limiting rod (13) passes through the L-shaped plate (201) and extends to the top of the L-shaped plate (201).

3. The grounding wire device for a low-voltage integrated distribution box according to claim 1 is characterized in that: The buffer assembly (3) comprises a first slide groove (303) provided on the second clamping block (5); the inner wall of the first slide groove (303) is slidably connected with a slide plate (304); a second telescopic spring (305) is provided inside the first slide groove (303); a second slide rod (302) is fixed to the side of the slide plate (304) away from the second telescopic spring (305); one end of the second slide rod (302) passes through the second clamping block (5) and extends to the outside of the second clamping block (5); an arc plate (301) is fixed to the end of the second slide rod (302) located outside the second clamping block (5).

4. The grounding wire device for a low-voltage integrated distribution box according to claim 1 is characterized in that: A threaded rod (7) is rotatably connected to a side of the first clamping block (4) away from the second clamping block (5), and an outer surface of the threaded rod (7) is threadedly connected to an inner wall of a hole on one side of the U-shaped frame (1), and a turning handle (8) is fixed to one end of the threaded rod (7) away from the first clamping block (4).

5. The grounding wire device for a low-voltage integrated distribution box according to claim 1 is characterized in that: The inner bottom wall of the U-shaped frame (1) is provided with a second slide groove (10), the inner wall of the second slide groove (10) is fixed with a third slide rod (11), the outer surface of the third slide rod (11) is slidably connected with a slider (12), and the outer surface of the slider (12) is in sliding contact with the inner wall of the second slide groove (10), and the upper surface of the slider (12) is fixed to the bottom surface of the first clamping block (4).

6. The grounding wire device for a low-voltage integrated distribution box according to claim 3 is characterized in that: The arc-shaped plate (301) is provided with anti-slip grooves (9), and the first clamping block (4) is provided with an arc-shaped groove (6), and the diameter of the arc-shaped groove (6) is the same as the inner diameter of the arc-shaped plate (301).

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