Direct-current electrical cabinet circuit breaker handcart grounding protection structure

Abstract

The utility model discloses a grounding protection structure for a circuit breaker handcart of a direct-current electrical cabinet, which comprises a handcart body movably connected to the upper surface of a handcart bottom plate, a connecting block fixedly connected to the lower surface of the handcart body, a roller rotatably connected to the side surface of the connecting block, and a fixed plate fixedly connected to the lower surface of the handcart body. The lower surface of the fixed plate is fixedly connected with a V-shaped copper bar; the upper surface of the handcart bottom plate is fixedly connected with a support, the upper portion of the support is fixedly connected with a Z-shaped copper bar, the Z-shaped copper bar is detachably connected with the support through an axial screw, the coaxial surface of the axial screw is provided with a spring, the side surface of the axial screw is provided with a nut, and the upper surface of the Z-shaped copper bar is fixedly connected with a grounding flexible wire. By means of the structure, separation and contact grounding work of the V-shaped copper bar and the Z-shaped copper bar are achieved, after the V-shaped copper bar is separated, the Z-shaped copper bar is reset through the spring, and the handcart has the advantages of being simple in structure assembly and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of grounding protection structures, in particular to a grounding protection structure for a circuit breaker trolley of a DC electrical cabinet. Background Art

[0002] A grounding protection structure for a circuit breaker trolley of a DC electrical cabinet is installed at the bottom of the circuit breaker trolley and is connected to the grounding at the bottom of the electrical cabinet. In a DC switch cabinet, the circuit breaker trolley is a movable device. After being pushed into the cabinet and in place, it is required that the circuit breaker trolley be connected to the grounding of the electrical cabinet body. In the past, the grounding structure of the circuit breaker used a special grounding contact part, and its triggering method was relatively troublesome, resulting in high requirements for matching accuracy, making the triggering of the protection structure relatively troublesome, and the stability of the internal protection structure of the device was poor. Components were likely to fall off after long-term use, and the stability of the contact parts was poor, prone to contact errors, resulting in the failure of the protection structure to trigger. The utility model realizes the grounding function through the ingenious combination of a special-shaped copper bar and standard parts, making the triggering of the protection structure simpler, and it can quickly rebound, facilitating subsequent use. Summary of the Utility Model

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and provide a grounding protection structure for a circuit breaker trolley of a DC electrical cabinet. The trolley body has rollers to drive the movement, so that the V-shaped copper bar contacts the Z-shaped copper bar and reaches the highest point of the V-shaped copper bar and the Z-shaped copper bar, completing the purpose of grounding protection. And the Z-shaped copper bar is pressed by a spring, so that after the V-shaped copper bar and the Z-shaped copper bar are separated, it can be reset, realizing the separation and contact grounding work of the V-shaped copper bar and the Z-shaped copper bar. After the V-shaped copper bar is separated, the spring resets the Z-shaped copper bar. The structure is easy to trigger, achieving the advantages of the grounding protection purpose. By setting a V-shaped copper bar, a Z-shaped copper bar and a bracket with simple manufacturing, and using existing axially-positioned screws, flat washers, self-tapping flat washers, grounding flexible wires, spring washers and nuts to assemble the protection structure, it realizes the advantages that the internal components of this structure are simple to process, and mostly existing components are combined and used, and the structure assembly is simple, making the protection structure convenient to use.

[0004] The present utility model also provides a grounding protection structure for a circuit breaker trolley of a DC electrical cabinet having the above-mentioned structure, including: a trolley bottom plate, on the upper surface of which a trolley body is movably connected; a connecting block fixedly connected to the lower surface of the trolley body; a roller rotatably connected to the side surface of the connecting block; a fixing plate fixedly connected to the lower surface of the trolley body; and a V-shaped copper bar fixedly connected to the lower surface of the fixing plate. A bracket is fixedly connected to the upper surface of the trolley bottom plate, and a Z-shaped copper bar is fixedly connected above the bracket. The Z-shaped copper bar is detachably connected to the bracket by an axially-positioned screw. A spring is arranged on the coaxial surface of the axially-positioned screw, and a nut is arranged on the side surface of the axially-positioned screw. A grounding flexible wire is fixedly connected to the upper surface of the Z-shaped copper bar, and one end of the grounding flexible wire away from the Z-shaped copper bar is fixedly connected to the trolley bottom plate by a flat washer self-tapping screw. Through the above device, the separation and contact grounding work between the V-shaped copper bar and the Z-shaped copper bar are realized. After the V-shaped copper bar is disengaged, the spring resets the Z-shaped copper bar, and the structure is simply assembled and convenient to use.

[0005] According to a grounding protection structure for a circuit breaker trolley of a DC electrical cabinet described in the present utility model, the roller is movably connected to the trolley bottom plate, and the V-shaped copper bar is movably connected to the Z-shaped copper bar. Through the above device, the effect of ensuring that the V-shaped copper bar and the Z-shaped copper bar can be stably connected for grounding protection is achieved.

[0006] According to a grounding protection structure for a circuit breaker trolley of a DC electrical cabinet described in the present utility model, a spring washer is arranged on the lower surface of the nut, and a flat washer is arranged on the lower surface of the spring washer. Through the above device, the advantage of enhancing the connection stability of the nut is achieved.

[0007] According to a grounding protection structure for a circuit breaker trolley of a DC electrical cabinet described in the present utility model, a bearing is arranged inside the connecting block, a rotating shaft is fixedly connected inside the bearing, and the roller is fixedly connected to the rotating shaft. Through the above device, the effect of stably rotating the roller for trolley movement is achieved.

[0008] According to a grounding protection structure for a circuit breaker trolley of a DC electrical cabinet described in the present utility model, the spring is located between the Z-shaped copper bar and the bracket, and the nut is located below the bracket. Through the above device, the advantage that the spring can stably ensure the reset work of the Z-shaped copper bar is achieved.

[0009] According to a grounding protection structure for a circuit breaker trolley of a DC electrical cabinet described in the present utility model, a reserved hole position is arranged on the upper surface of the trolley bottom plate, and the flat washer self-tapping screw is detachably connected to the reserved hole position. Through the above device, the effect that the flat washer self-tapping screw can be stably connected and fixed is achieved.

[0010] A grounding protection structure for the circuit breaker trolley of a DC electrical cabinet according to the present utility model. A stud is fixedly connected to the upper surface of the trolley bottom plate, and the stud is fixedly connected to the bracket. Through the above device, the advantages of ensuring stable connection and firm position of the bracket are achieved.

[0011] Beneficial effects

[0012] 1. Compared with the prior art, in this grounding protection structure for the circuit breaker trolley of the DC electrical cabinet, the trolley body drives the movement through the rollers, so that the V-shaped copper bar contacts the Z-shaped copper bar and reaches the highest point of the V-shaped copper bar and the Z-shaped copper bar, completing the purpose of grounding protection. And the Z-shaped copper bar is pressed by the spring, so that after the V-shaped copper bar and the Z-shaped copper bar are separated, it can be reset. The separation and contact grounding work of the V-shaped copper bar and the Z-shaped copper bar are realized. After the V-shaped copper bar is separated, the spring resets the Z-shaped copper bar. The structure is easy to trigger and achieves the purpose of grounding protection.

[0013] 2. Compared with the prior art, in this grounding protection structure for the circuit breaker trolley of the DC electrical cabinet, by setting a V-shaped copper bar, a Z-shaped copper bar and a bracket with simple manufacturing, and using existing shaft position screws, flat washers, self-tapping flat washers, grounding flexible wires, spring washers and nuts to assemble the protection structure, the processing of the internal components of this structure is simple, and most of them use existing components in combination. The structure is simple to assemble, making the protection structure convenient to use. Description of the drawings

[0014] The following further describes the present utility model in conjunction with the drawings and embodiments;

[0015] Figure 1 It is the overall structure diagram of the grounding protection structure for the circuit breaker trolley of the DC electrical cabinet of the present utility model;

[0016] Figure 2 It is the sectional structure diagram of the grounding protection structure for the circuit breaker trolley of the DC electrical cabinet of the present utility model;

[0017] Figure 3 It is the specific schematic diagram of the grounding protection structure for the circuit breaker trolley of the DC electrical cabinet of the present utility model.

[0018] Legend description:

[0019] 1. Z-shaped copper bar; 2. Grounding flexible wire; 3. Shaft position screw; 4. Trolley bottom plate; 5. Self-tapping flat washer; 6. Bracket; 7. Spring; 8. Spring washer; 9. Flat washer; 10. Nut; 11. Roller; 12. Fixed plate; 13. Trolley body; 14. V-shaped copper bar. Specific implementation manners

[0020] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The function of the accompanying drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model. However, it should not be construed as a limitation on the protection scope of the present utility model.

[0021] Referring to Figures 1-3 , an earthing protection structure for the circuit breaker trolley of a DC electrical cabinet according to an embodiment of the present utility model includes: a trolley bottom plate 4 for supporting the overall device and ensuring a stable moving channel for the trolley. The upper surface of the trolley bottom plate 4 is movably connected to a trolley body 13, which drives a V-shaped copper bar 14 to move for earthing protection work. The lower surface of the trolley body 13 is fixedly connected to a connecting block for connecting a roller 11 and the trolley body 13. The inside of the connecting block is provided with a bearing for fixing a rotating shaft. The inside of the bearing is fixedly connected to a rotating shaft for driving the roller 11 to rotate and move. The side surface of the connecting block is rotatably connected to the roller 11, and the roller 11 is fixedly connected to the rotating shaft. The roller 11 can stably drive the trolley body 13 to move. The roller 11 is movably connected to the trolley bottom plate 4 to ensure the stable movement of the roller 11. The lower surface of the trolley body 13 is fixedly connected to a fixing plate 12 for supporting and fixing the V-shaped copper bar 14. The lower surface of the fixing plate 12 is fixedly connected to the V-shaped copper bar 14, which contacts the Z-shaped copper bar 1, and the earthing protection work is realized through an earthing flexible wire 2.

[0022] The upper surface of the trolley bottom plate 4 is fixedly connected to a bracket 6 for fixing the Z-shaped copper bar 1. The upper surface of the trolley bottom plate 4 is fixedly connected to a stud, which can stably connect and fix the bracket 6. The stud is fixedly connected to the bracket (6), and the connection between the two is stable. The upper part of the bracket 6 is fixedly connected to the Z-shaped copper bar 1, and the V-shaped copper bar 14 is movably connected to the Z-shaped copper bar 1 for combined use with the V-shaped copper bar 14 for earthing protection work. The Z-shaped copper bar 1 and the bracket 6 are detachably connected by an axially positioned screw 3 for stably fixing the Z-shaped copper bar 1. A spring 7 is arranged on the coaxial plane of the axially positioned screw 3 for resetting the Z-shaped copper bar 1. The spring 7 is located between the Z-shaped copper bar 1 and the bracket 6 to limit the spring 7.

[0023] The side surface of the axial screw 3 is provided with a nut 10 for connecting the bracket 6 and the Z-shaped copper bar 1. The nut 10 is located below the spring 7 to limit the nut 10. The lower surface of the nut 10 is provided with a spring washer 8, and the lower surface of the spring washer 8 is provided with a flat washer 9, which can effectively enhance the function of connecting and fixing the nut. The upper surface of the Z-shaped copper bar 1 is fixedly connected with a grounding flexible wire 2 to realize the function of grounding protection. One end of the grounding flexible wire 2 far away from the Z-shaped copper bar 1 is fixedly connected with the handcart bottom plate 4 through a flat washer self-tapping screw 5 to fix the grounding flexible wire 2. The upper surface of the handcart bottom plate 4 is provided with a reserved hole position, and the flat washer self-tapping screw 5 is detachably connected with the reserved hole position to limit and fix the flat washer self-tapping screw 5.

[0024] Working principle: Fix the V-shaped copper bar 14 on the fixing plate 12 at the bottom of the handcart body 13, and then install the bracket 6 on the handcart bottom plate 4 through the axial screw 3 and the stud. Fix the Z-shaped copper bar 1 on the bracket 6 through the flat washer 9, the spring washer 8 and the nut 10. Connect one end of the grounding flexible wire 2 to the reserved hole on the handcart bottom plate 4 through the flat washer self-tapping screw 5. At this time, drive the V-shaped copper bar 14 to contact the Z-shaped copper bar 1 through the roller 11 connected by the connecting block under the handcart body 13. When the two copper bars start to contact, the V-shaped copper bar 14 uses the slope of the Z-shaped copper bar 1 to gradually compress the spring 7 below the Z-shaped copper bar 1 in a movement mode similar to climbing. When the handcart body 13 is completely pushed into the electrical cabinet, the highest parts of the V-shaped copper bar 14 and the Z-shaped copper bar 1 are in contact with each other, thus completing the whole process of the two copper bars from separation to contact, and further realizing the purpose of grounding protection.

[0025] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. A DC electrical cabinet circuit breaker trolley grounding protection structure, characterized in that: include: A trolley bottom plate (4), wherein the upper surface of the trolley bottom plate (4) is movably connected to a trolley body (13), the lower surface of the trolley body (13) is fixedly connected to a connecting block, the side surface of the connecting block is rotatably connected to a roller (11), the lower surface of the trolley body (13) is fixedly connected to a fixing plate (12), and the lower surface of the fixing plate (12) is fixedly connected to a V-shaped copper busbar (14); A bracket (6) is fixedly connected to the upper surface of the trolley bottom plate (4), a Z-shaped copper busbar (1) is fixedly connected above the bracket (6), the Z-shaped copper busbar (1) and the bracket (6) are detachably connected via an axial screw (3), a spring (7) is provided on the coaxial surface of the axial screw (3), a nut (10) is provided on the side surface of the axial screw (3), a grounding soft wire (2) is fixedly connected to the upper surface of the Z-shaped copper busbar (1), and one end of the grounding soft wire (2) away from the Z-shaped copper busbar (1) is fixedly connected to the trolley bottom plate (4) via a flat washer self-tapping screw (5).

2. A DC electrical cabinet circuit breaker trolley grounding protection structure according to claim 1, characterized in that: The roller (11) is movably connected to the bottom plate (4) of the trolley, and the V-shaped copper busbar (14) is movably connected to the Z-shaped copper busbar (1).

3. A DC electrical cabinet circuit breaker trolley grounding protection structure according to claim 1, characterized in that: A spring washer (8) is provided on the lower surface of the nut (10), and a flat washer (9) is provided on the lower surface of the spring washer (8).

4. A DC electrical cabinet circuit breaker trolley grounding protection structure according to claim 1, characterized in that: A bearing is arranged inside the connection block, a rotating shaft is fixedly connected inside the bearing, and the roller (11) is fixedly connected to the rotating shaft.

5. A DC electrical cabinet circuit breaker trolley grounding protection structure according to claim 1, characterized in that: The spring (7) is located between the Z-shaped copper bar (1) and the bracket (6), and the nut (10) is located below the bracket (6).

6. A DC electrical cabinet circuit breaker trolley grounding protection structure according to claim 1, characterized in that: The upper surface of the trolley bottom plate (4) is provided with a reserved hole, and the flat washer self-tapping screw (5) is detachably connected to the reserved hole.

7. A DC electrical cabinet circuit breaker trolley grounding protection structure according to claim 1, characterized in that: The upper surface of the trolley bottom plate (4) is fixedly connected with a stud, and the stud is fixedly connected to the bracket (6).

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