Grounding knife switch and three-position load switch with good contact

Abstract

This utility model discloses a grounding switch with good contact and a three-position load switch. The grounding switch with good contact includes a grounding switch body. Fixed plates are spaced apart on both sides of the moving contact of the grounding switch body. A movable plate is arranged between the fixed plate and the moving contact. Multiple springs are arranged between the movable plate and the fixed plate. Sliding plates are arranged at both ends of the movable plate. A connecting plate is arranged between two sliding plates on the outside of the fixed plate. A sliding column is vertically arranged on the outer wall of the fixed plate, and a screw is arranged on the outside of the sliding column. A sliding hole is provided on the connecting plate for the sliding column and the screw to pass through. A nut is provided on the screw. The moving contact provided by this utility model can ensure stable contact and impact resistance after closing. After closing, the spring drives the movable plate to tightly abut against the stationary contact. When encountering external impact, the spring absorbs the impact energy through compression deformation, avoiding direct impact force on the contact area of ​​the moving and stationary contacts, effectively preventing the contacts from deforming or separating due to rigid collision, and always maintaining a reliable contact state.

Description

Technical Field

[0001] This utility model relates to a grounding switch with good contact and a three-position load switch. Background Technology

[0002] Three-position load switches are key power distribution equipment in power systems that integrate switching, isolation, and grounding functions, and are widely used in medium and high voltage switchgear, ring main units, and other scenarios. The grounding switch, as its core component, is responsible for isolating the circuit under repair from the power grid during maintenance, which is crucial for ensuring safety.

[0003] The closing reliability of grounding switches is crucial. To ensure sufficient contact pressure between the moving and stationary contacts to maintain low resistance, existing designs typically employ a rigid structure, but lack a buffering mechanism. This means that if an external impact occurs after closing, the energy will be directly conducted to the contact system and operating mechanism, easily leading to contact deformation, mechanical damage, and other problems, posing a safety hazard. Utility Model Content

[0004] The main purpose of this utility model is to provide a grounding switch and a three-position load switch with good contact, so as to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved by adopting the following technical solution: A grounding switch with good contact includes a grounding switch body. Fixed plates are spaced apart on both sides of the moving contact of the grounding switch body. A movable plate is arranged between the fixed plate and the moving contact. Multiple springs are arranged between the movable plate and the fixed plate. Sliding plates are arranged at both ends of the movable plate. A connecting plate is arranged between two sliding plates on the outside of the fixed plate. A sliding column is vertically arranged on the outer wall of the fixed plate. A screw is arranged on the outside of the sliding column. A sliding hole is provided on the connecting plate for the sliding column and the screw to pass through. A nut is arranged on the screw.

[0006] Preferably, the inner side of the movable plate abuts against the stationary contact, and the inner side of the movable plate has an arc-shaped structure.

[0007] Preferably, the two ends of the spring are horizontally fixedly connected to the fixed plate and the movable plate, respectively.

[0008] Preferably, the fixed plate has horizontal grooves at both ends, and the sliding plate has a slide rail that cooperates with the grooves on its inner side.

[0009] Preferably, two slide rails are provided, which are located inside the sliding plate and spaced apart along its height.

[0010] Preferably, the diameter of the sliding column is greater than the diameter of the screw.

[0011] Preferably, there are two sliding columns, which are horizontally spaced apart on the outer side of the fixed plate.

[0012] A three-position load switch, comprising the grounding switch described in any one of the above claims.

[0013] The beneficial technical effects of this utility model are as follows: The moving contact provided by this utility model can ensure stable contact and impact resistance after closing. After closing, the spring drives the moving plate to tightly abut against the stationary contact; when encountering external impact, the spring absorbs the impact energy through compression deformation, avoiding the impact force from acting directly on the contact part of the moving and stationary contacts, effectively preventing the contacts from deforming or separating due to rigid collision, and always maintaining a reliable contact state. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the grounding switch body structure according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the moving contact and the components on both sides of an embodiment of the present invention; Figure 3 This is a top view of the moving contact and the two side components of an embodiment of the present invention; Figure 4 This is a cross-sectional view of the moving contact and the two side components of an embodiment of the present invention; Figure 5 This is a schematic diagram of the moving contact and fixing plate structure according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the movable plate structure according to an embodiment of the present invention.

[0015] In the diagram: 1. Grounding switch body; 2. Moving contact; 3. Fixed plate; 4. Moving plate; 5. Spring; 6. Sliding plate; 7. Connecting plate; 8. Sliding column; 9. Screw; 10. Sliding hole; 11. Nut; 12. Sliding groove; 13. Sliding rail. Detailed Implementation

[0016] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0017] like Figures 1-6As shown, the grounding switch with good contact provided in this embodiment includes a grounding switch body 1. Fixed plates 3 are spaced apart on both sides of the moving contact 2 of the grounding switch body 1. A movable plate 4 is provided between the fixed plate 3 and the moving contact 2. Multiple springs 5 ​​are provided between the movable plate 4 and the fixed plate 3. Sliding plates 6 are provided at both ends of the movable plate 4. A connecting plate 7 is provided between the two sliding plates 6 on the outside of the fixed plate 3. A sliding column 8 is vertically provided on the outer wall of the fixed plate 3. A screw 9 is provided on the outside of the sliding column 8. A sliding hole 10 is provided on the connecting plate 7 for the sliding column 8 and the screw 9 to pass through. A nut 11 is provided on the screw 9.

[0018] If an external impact occurs after the circuit is closed, the spring 5 can absorb the impact energy through its own compression deformation, preventing the impact from being directly transmitted to the contact area between the moving contact 2 and the stationary contact, preventing the contacts from deforming or detaching due to rigid collision, and ensuring contact stability.

[0019] This application only improves the structure of the moving contact 2; other components of the grounding switch body 1 can use existing technology.

[0020] In this embodiment, as Figure 2 As shown, the inner side of the movable plate 4 abuts against the stationary contact. The inner side of the movable plate 4 has an arc-shaped structure. During the closing process, the moving contact 2 moves closer to the stationary contact. Since the inner side of the movable plate 4 has an arc-shaped structure, the stationary contact will first contact the arc edge. As the closing action continues to advance, the stationary contact will naturally squeeze the movable plate 4 along the arc surface, forcing the movable plate 4 to move horizontally away from the stationary contact, thereby compressing the spring 5 between the fixed plate 3 and the movable plate 4, and finally putting the spring 5 in a pre-compressed state. When the closing is in place, the pre-compressed spring 5 will generate a reverse elastic force, pressing the movable plate 4 against the stationary contact, providing the movable plate 4 with continuous and stable positive contact pressure, and ensuring that it can stably play a damping and buffering effect when an impact occurs.

[0021] In this embodiment, as Figure 4 As shown, the two ends of the spring 5 are horizontally fixed to the fixed plate 3 and the movable plate 4 respectively. When subjected to impact, the spring 5 drives the movable plate 4 to move outward horizontally to absorb the impact and protect the good contact between the moving contact 2 and the stationary contact.

[0022] In this embodiment, as Figure 5 and Figure 6 As shown, the fixed plate 3 has horizontally arranged grooves 12 at both ends, and the inner side of the sliding plate 6 has a slide rail 13 that works with the grooves 12. The cooperation between the grooves 12 and the slide rail 13 forms a sliding guide mechanism, which limits the moving plate 4 to move only in the horizontal direction, so as to prevent the moving plate 4 from shifting up and down or tilting when it is impacted, thus ensuring the buffering effect.

[0023] In this embodiment, as Figure 6As shown, there are two slide rails 13. The two slide rails 13 are located inside the sliding plate 6 and are spaced apart along its height. The two slide rails 13 can jointly bear the weight of the sliding plate 6 and the moving plate 4, as well as the lateral force during the impact process, thereby improving the durability of the guide mechanism.

[0024] In this embodiment, as Figure 3 As shown, the diameter of the sliding column 8 is greater than the diameter of the screw 9. The end face of the nut 11 will eventually be blocked by the end face of the sliding column 8, which restricts the fixed position of the nut 11 and prevents the operator from over-tightening the nut 11.

[0025] In this embodiment, as Figure 2 As shown, there are two sliding pillars 8, which are horizontally spaced on the outside of the fixed plate 3 to ensure the stability of the sliding plate 4.

[0026] A three-position load switch, comprising the grounding switch described in any one of the above claims.

[0027] In summary, in this embodiment, the moving contact 2 provides stable contact and impact resistance after closing. After closing, the spring 5 drives the moving plate 4 to tightly abut against the stationary contact; when encountering external impact, the spring 5 absorbs the impact energy through compression deformation, preventing the impact force from directly acting on the contact parts of the moving and stationary contacts, effectively preventing the contacts from deforming or detaching due to rigid collision, and always maintaining a reliable contact state.

[0028] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A grounding switch with good contact, comprising a grounding switch body (1), characterized in that: Fixed plates (3) are provided on both sides of the moving contact (2) of the grounding switch body (1). A movable plate (4) is provided between the fixed plate (3) and the moving contact (2). Multiple springs (5) are provided between the movable plate (4) and the fixed plate (3). Sliding plates (6) are provided at both ends of the movable plate (4). A connecting plate (7) is provided between the two sliding plates (6) on the outside of the fixed plate (3). A sliding column (8) is vertically provided on the outer wall of the fixed plate (3). A screw (9) is provided on the outside of the sliding column (8). A sliding hole (10) is provided on the connecting plate (7) for the sliding column (8) and the screw (9) to pass through. A nut (11) is provided on the screw (9).

2. A grounding switch with good contact according to claim 1, characterized in that: The inner side of the movable plate (4) abuts against the stationary contact, and the inner side of the movable plate (4) has an arc-shaped structure.

3. A grounding switch with good contact according to claim 1, characterized in that: The two ends of the spring (5) are horizontally fixed to the fixed plate (3) and the movable plate (4), respectively.

4. A grounding switch with good contact according to claim 1, characterized in that: The fixed plate (3) has horizontally arranged grooves (12) at both ends, and the sliding plate (6) has a slide rail (13) on the inner side that cooperates with the grooves (12).

5. A grounding switch with good contact according to claim 4, characterized in that: Two slide rails (13) are provided, and the two slide rails (13) are located inside the sliding plate (6) and spaced apart along its height direction.

6. A grounding switch with good contact according to claim 1, characterized in that: The diameter of the slide (8) is greater than the diameter of the screw (9).

7. A grounding switch with good contact according to claim 1, characterized in that: Two sliding columns (8) are provided, and the two sliding columns (8) are horizontally spaced apart on the outside of the fixing plate (3).

8. A three-position load switch, characterized in that: Including the grounding switch as described in any one of claims 1-7.

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