A fast ground switch contact assembly

Abstract

The utility model discloses a quick grounding switch contact subassembly, the fixed cylinder is vertically installed on the installation board and is located at the both ends position of ground copper row, the centre position vertical sliding of fixed cylinder is connected with the slide rod, the top fixed connection of slide rod has the installation rod, the installation rod bottom is equipped with a plurality of insulating cover that cooperates with the grounding switch static contact, the fixed cylinder is provided with the moving mechanism that utilizes the swing of grounding switch dynamic contact as power and makes insulating cover move up and down, the utility model discloses when opening the gate, utilizes the swing of grounding switch dynamic contact force, makes insulating cover fast cover and set on grounding switch static contact, thereby cuts off electric arc, effectively reduces the rebound of closing, reduces the ablation between dynamic static contact simultaneously, has improved the closing ability of grounding switch, ensures the reliability of switch, utilizes the movement of insulating cover on grounding switch static contact, and makes the cleaning block on insulating cover clean grounding switch static contact.

Description

Technical Field

[0001] This utility model relates to the field of grounding switch technology, and in particular to a fast grounding switch contact assembly. Background Technology

[0002] A grounding switch is a mechanical grounding device used to release static charge from equipment and circuits under maintenance and to ensure the safety of maintenance personnel during power outages. It can withstand current for a certain period under abnormal conditions (such as short circuits), but does not carry load current under normal conditions. It is usually part of a disconnecting switch. When a grounding switch is opened and closed, an electric arc is generated, especially in high-voltage transmissions such as 72.5kV high-voltage transmissions. The arc can burn the contacts of the grounding switch, affecting their service life. Chinese utility model patent, announcement number CN220933926U, provides a static contact assembly for a grounding switch in an environmentally friendly gas-insulated ring main unit, including static contacts, a closing buffer device, and a support frame. The static contacts and closing buffer device are correspondingly arranged, and the three phases are evenly distributed on the support frame. The static contacts are L-shaped. The structure consists of two parts: one part connected to the vertical surface of the supporting frame, and the other part composed of upper and lower mortise and tenon joints. The upper part is the silver-tungsten part of the stationary contact, and the lower part is the copper part of the stationary contact. The closing buffer device is composed of three layers of ACF cartilage biomimetic material, silicone rubber, and polyurethane connected in sequence. However, this application will generate an electric arc when the grounding switch is opened and closed, especially in high-voltage transmission, such as 72.5kV high-voltage transmission. The electric arc will burn the contacts of the grounding switch, and the existing technology does not have a contact cleaning structure. Long-term use will affect the service life of the contacts. Utility Model Content

[0003] This utility model patent aims to address the shortcomings of the prior art by providing a fast grounding switch contact assembly to solve the technical problems of arc erosion of contacts during the opening and closing of existing grounding switches and the inability to clean the contacts.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a fast grounding switch contact assembly, wherein the grounding switch includes a grounding copper busbar mounted on a mounting plate, and several stationary grounding switches on the grounding copper busbar respectively cooperate with grounding switch moving contacts on an insulating rod. A fixed cylinder is also vertically mounted at both ends of the grounding copper busbar on the mounting plate, and a sliding rod is vertically slidably connected to the center of the fixed cylinder. An installation rod is fixedly connected to the top of the sliding rod, and the installation rod is horizontally arranged. Several insulating covers that cooperate with the stationary grounding switches are mounted at the bottom of the installation rod. A moving mechanism is provided on the fixed cylinder to move the insulating covers up and down using the swing of the grounding switch moving contacts as power.

[0005] Preferably, the moving mechanism includes a sliding plate disposed inside the fixed cylinder, the sliding plate being fixedly connected to the outer surface of the slide rod, and the sliding plate being movable along the inner wall of the fixed cylinder.

[0006] Preferably, a tension spring for pulling the sliding plate upward is installed on the top of the sliding plate, the top end of the tension spring is installed on the inner top wall of the fixed cylinder, and the tension spring is sleeved on the sliding rod.

[0007] Preferably, a connecting plate is provided on the side of the mounting rod away from the mounting plate, two support plates are installed on the side wall of the fixing cylinder away from the mounting plate, two guide posts are installed between the two support plates, a pull rope is provided at the bottom of the connecting plate, and one end of the pull rope passes through the two guide posts and is installed on the side wall of the insulating rod.

[0008] Preferably, the grounding switch stationary contact, the grounding switch moving contact, and the insulating cover are three in number.

[0009] Preferably, the mounting rod and the connecting plate are integrally machined.

[0010] Preferably, cleaning blocks for cleaning the stationary contacts of the grounding switch are installed on both opposite inner walls of the insulating cover.

[0011] Preferably, a fixing plate is installed at the bottom of the mounting plate, and the fixing plate and the mounting plate cooperate to form an L-shaped plate. A cleaning plate corresponding to the stationary contact and the moving contact of the grounding switch is vertically installed on the side of the fixing plate away from the mounting plate.

[0012] Preferably, a rubber ring for sealing is provided at the sliding connection between the slide rod and the fixed cylinder.

[0013] Preferably, the mounting rod is provided with reinforcing ribs inside to improve the structural strength of the mounting rod.

[0014] The beneficial effects of this utility model are: When the gate is opened, this utility model utilizes the force of the swinging of the moving contact of the grounding switch to quickly cover the insulating cover on the stationary contact of the grounding switch, thereby interrupting the electric arc, effectively reducing the rebound when closing, and reducing the burning between the moving and stationary contacts, improving the closing capability of the grounding switch and ensuring the reliability of the switch. This invention utilizes the movement of the insulating cover on the stationary contact of the grounding switch to allow the cleaning block on the insulating cover to clean the stationary contact of the grounding switch. By causing the moving contact of the grounding switch to swing through the first cleaning plate, the first cleaning plate cleans the moving contact of the grounding switch, effectively improving the contact efficiency of the stationary and moving contacts of the grounding switch. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic cross-sectional view of the fixed cylinder of this utility model; Figure 3 This is a schematic diagram of the insulating cover structure of this utility model; Figure 4 This is a schematic diagram of the structure of this practical cleanup version; In the diagram: 1. Mounting plate; 2. Grounding copper busbar; 3. Sliding rod; 4. Mounting rod; 5. Insulating cover; 6. Grounding switch moving contact; 7. Insulating rod; 8. Pull rope; 9. Cleaning plate; 10. Connecting plate; 11. Fixing cylinder; 12. Support plate; 13. Fixing plate; 14. Grounding switch stationary contact; 15. Guide column; 16. Tension spring; 17. Sliding plate. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1-4 As shown, a fast grounding switch contact assembly includes a grounding copper busbar 2 mounted on a mounting plate 1. Several stationary grounding contacts 14 on the grounding copper busbar 2 respectively cooperate with moving grounding contacts 6 on an insulating rod 7. The assembly is characterized by the following features: fixed cylinders 11 are vertically mounted at both ends of the grounding copper busbar 2 on the mounting plate 1; a sliding rod 3 is vertically slidably connected to the center of the fixed cylinder 11; a mounting rod 4 is fixedly connected to the top of the sliding rod 3; the mounting rod 4 is horizontally positioned; several insulating covers 5 cooperating with the stationary grounding contacts 14 are mounted at the bottom of the mounting rod 4; and a moving mechanism is provided on the fixed cylinder 11 to move the insulating covers 5 up and down using the swing of the moving grounding contacts 6 as power. In this embodiment... The moving contact of the grounding switch swings via a drive device in the prior art. Referring to the existing GW13-72.5 / 400 outdoor neutral point disconnecting switch, the existing grounding switch mainly includes a mounting plate 1 with a grounding copper busbar 2 mounted on the inner side of the mounting plate. Several grounding stationary contacts 14 are arranged on the grounding copper busbar 2 on the side away from the mounting plate 1. The existing grounding switch also includes a grounding moving contact 6 mounted on an insulating rod 7. During use, the handle is manually moved to connect the grounding moving contact 6 with the grounding stationary contact 14 to complete the closing operation, or the handle is turned to separate the grounding moving contact 6 from the grounding stationary contact 14 to complete the opening operation. In this application, fixed cylinders 11 are installed at both ends of the grounding copper busbar 2 on the mounting plate 1, and sliding rods 3 are slidably connected inside the fixed cylinders 11. Figure 1As shown, the two ends of the sliding rod 3 pass through the fixed cylinder 11 respectively. The fixed cylinders 11 located at both ends of the grounding copper busbar 2 are fixedly connected to the top of the sliding rod 3 with mounting rods 4. The mounting rods 4 are arranged horizontally, and the bottom of the mounting rods 4 is provided with several insulating covers 5 that cooperate with the stationary contact 14 of the grounding switch. In this application, the swing of the moving contact 6 of the grounding switch is used to drive the insulating covers 5 to separate and protect the stationary contact 14 of the grounding switch by the power of the grounding switch closing and opening.

[0019] Preferably, the moving mechanism includes a sliding plate 17 disposed inside the fixed cylinder 11. The sliding plate 17 is fixedly connected to the outer surface of the slide rod 3, and the sliding plate 17 can move along the inner wall of the fixed cylinder 11. In this embodiment, the moving mechanism mainly includes a sliding plate 17 disposed inside the fixed cylinder 11. Specifically, the sliding plate 17 is fixedly connected to the outer surface of the slide rod 3. When the sliding plate 17 moves up and down along the inner wall of the fixed cylinder 11, it can drive the slide rod 3 to move up and down.

[0020] Preferably, a tension spring 16 for pulling the sliding plate 17 upward is installed on the top of the sliding plate 17. The top end of the tension spring 16 is installed on the inner top wall of the fixed cylinder 11, and the tension spring 16 is sleeved on the slide rod 3. In this embodiment, a tension spring 16 is provided on the top of the sliding plate 17, and the top end of the tension spring 16 is fixedly connected to the inner top wall of the fixed cylinder 11. The key point of this embodiment is that when the tension spring 16 is relaxed and tightened, the sliding plate 17 is in a high position inside the fixed cylinder 11. At the same time, the slide rod 3, the mounting rod 4 on the top of the slide rod 3, and the insulating cover 5 on the mounting rod 4 are all in a high position. The insulating cover 5 is located above the stationary contact 14 of the grounding switch, and in this state, the stationary contact 14 of the grounding switch is connected to the moving contact 6 of the grounding switch in the closed state.

[0021] Preferably, a connecting plate 10 is provided on the side of the mounting rod 4 away from the mounting plate 1, and two support plates 12 are installed on the side wall of the fixing cylinder 11 away from the mounting plate 1. Two guide posts 15 are installed between the two support plates 12. A pull rope 8 is provided at the bottom of the connecting plate 10, and one end of the pull rope 8 passes between the two guide posts 15 and is installed on the side wall of the insulating rod 7; in this embodiment, as Figure 1As shown, a connecting plate 10 is installed on the side of the mounting rod 4 away from the mounting plate 1, and two symmetrical support plates 12 are installed on the outer surface of the fixing cylinder 11 directly below the connecting plate 10. Two guide posts 15 are installed between the two support plates 12. The tension 8 at the bottom of the connecting plate 10 passes through the two guide posts 15 and connects to the insulating rod 7. In use, the opening and closing action of the insulating rod 7 drives the insulating cover 5 to move up and down. Specifically, when the insulating rod 7 opens, the moving contact 6 of the grounding switch is pulled open and away from the stationary contact 14, and is connected by the pull rope 8. The connecting plate 10 and the mounting rod 4 move downwards, causing the insulating cover 5 to cover the stationary contact 14. At the same time, the mounting rod 4 moves downwards, causing the sliding rod 3 to slide downwards and the sliding plate 17 to move downwards. At this time, the tension spring 16 located at the top of the sliding plate 17 is stretched. When the closing action is performed, the moving contact 6 of the grounding switch moves closer to the stationary contact of the grounding switch, the pull rope 8 is relaxed, and the tension spring 16 contracts, causing the sliding plate 17 and the sliding rod 3 to move upwards. This causes the connecting plate 10 and the mounting rod 4 to move upwards, at which point the insulating cover 5 separates from the stationary contact 14 of the grounding switch.

[0022] Preferably, there are three grounding switch stationary contact 14, grounding switch moving contact 6, and insulating cover 5.

[0023] Preferably, the mounting rod 4 and the connecting plate 10 are integrally machined.

[0024] Preferably, cleaning blocks 18 for cleaning the stationary contact 14 of the grounding switch are installed on both opposite inner walls of the insulating cover 5; in this embodiment, the insulating cover 5 is as follows: Figure 3 The rectangle shown is open on one side and bottom, and is used to cooperate with the cuboid grounding switch stationary contact 14. Cleaning blocks 18 are installed on opposite sides of the inner wall of the insulating cover 5. When the insulating cover separates from and contacts the grounding switch stationary contact 14, the insulating cover 5 drives the cleaning blocks 18 to move, so that the cleaning blocks 18 clean the side wall of the grounding switch stationary contact 14.

[0025] Preferably, a fixing plate 13 is installed at the bottom of the mounting plate 1, and the fixing plate 13 and the mounting plate 1 cooperate to form an L-shaped plate. A cleaning plate 9 corresponding to the stationary contact 14 and the moving contact 6 of the grounding switch is vertically installed on the side of the fixing plate 13 away from the mounting plate 1. In this embodiment, a vertical strip-shaped cleaning plate 9 is installed through the fixing plate 13. When the moving contact of the grounding switch is opened or closed, the moving contact of the grounding switch passes through the side wall of the cleaning plate 9, so that the side wall of the cleaning plate 9 cleans the inner wall of the moving contact 6 of the grounding switch.

[0026] Preferably, a rubber ring for sealing is provided at the sliding connection between the slide rod 3 and the fixed cylinder 11.

[0027] Preferably, the mounting rod 4 is provided with reinforcing ribs inside to improve the structural strength of the mounting rod 4.

[0028] The specific working method of this application is as follows: During use, the opening and closing actions of the insulating rod 7 drive the insulating cover 5 to move up and down; specifically, when the insulating rod 7 opens, the moving contact 6 of the grounding switch is pulled away from the stationary contact 14, and the connecting plate 10 and the mounting rod 4 move downward through the pull rope 8, so that the insulating cover 5 covers the stationary contact 14. At the same time, the mounting rod 4 moves downward, driving the sliding rod 3 to slide downward and driving the sliding plate 17 to move downward. At this time, the tension spring 16 located at the top of the sliding plate 17 is stretched. When the closing action is performed, the moving contact 6 of the grounding switch moves closer to the stationary contact of the grounding switch, the pull rope 8 is relaxed, and the tension spring 16 is contracted, driving the sliding plate 17 and the sliding rod 3 to move upward, thereby driving the connecting plate 10 and the mounting rod 4 to move upward, and the insulating cover 5 separates from the stationary contact 14 of the grounding switch.

[0029] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A fast grounding switch contact assembly, the grounding switch comprising a grounding copper busbar (2) mounted on a mounting plate (1), wherein a plurality of stationary grounding switch contacts (14) on the grounding copper busbar (2) respectively cooperate with grounding switch moving contacts (6) on an insulating rod (7), characterized in that, The mounting plate (1) is also vertically mounted at both ends of the grounding copper busbar (2). A sliding rod (3) is vertically slidably connected to the center of the fixed cylinder (11). An installation rod (4) is fixedly connected to the top of the sliding rod (3). The installation rod (4) is horizontally arranged. Several insulating covers (5) that cooperate with the stationary contact (14) of the grounding switch are installed at the bottom of the installation rod (4). The fixed cylinder (11) is provided with a moving mechanism that uses the swing of the moving contact (6) of the grounding switch as power to move the insulating cover (5) up and down.

2. The fast grounding switch contact assembly according to claim 1, characterized in that, The moving mechanism includes a sliding plate (17) disposed inside the fixed cylinder (11). The sliding plate (17) is fixedly connected to the outer surface of the slide rod (3). The sliding plate (17) can move along the inner wall of the fixed cylinder (11).

3. The fast grounding switch contact assembly according to claim 2, characterized in that, The top of the sliding plate (17) is equipped with a tension spring (16) for pulling the sliding plate (17) upward. The top of the tension spring (16) is installed on the inner top wall of the fixed cylinder (11), and the tension spring (16) is sleeved on the slide rod (3).

4. The fast grounding switch contact assembly according to claim 3, characterized in that, A connecting plate (10) is provided on the side of the mounting rod (4) away from the mounting plate (1). Two support plates (12) are installed on the side wall of the fixing cylinder (11) away from the mounting plate (1). Two guide posts (15) are installed between the two support plates (12). A pull rope (8) is provided at the bottom of the connecting plate (10). One end of the pull rope (8) passes between the two guide posts (15) and is installed on the side wall of the insulating rod (7).

5. A fast grounding switch contact assembly according to claim 1, characterized in that, The grounding switch has three stationary contacts (14), three moving contacts (6), and three insulating covers (5).

6. A fast grounding switch contact assembly according to claim 4, characterized in that, The mounting rod (4) and the connecting plate (10) are integrally machined.

7. A fast grounding switch contact assembly according to claim 1, characterized in that, Cleaning blocks (18) for cleaning the stationary contact (14) of the grounding switch are installed on the two opposite inner walls of the insulating cover (5).

8. A fast grounding switch contact assembly according to claim 7, characterized in that, A fixing plate (13) is installed at the bottom of the mounting plate (1). The fixing plate (13) and the mounting plate (1) cooperate to form an L-shaped plate. A cleaning plate (9) corresponding to the stationary contact (14) and the moving contact (6) of the grounding switch is vertically installed on the side of the fixing plate (13) away from the mounting plate (1).

9. A fast grounding switch contact assembly according to claim 3, characterized in that, A rubber ring for sealing is provided at the sliding connection between the slide rod (3) and the fixed cylinder (11).

10. A fast grounding switch contact assembly according to claim 1, characterized in that, The mounting rod (4) is provided with reinforcing ribs inside to improve the structural strength of the mounting rod (4).

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