A dual-redundant contact structure for a disconnector switch

Abstract

This utility model discloses a dual-redundant contact structure for a disconnecting switch, specifically relating to the field of disconnecting switch technology. It includes a base, an outer cover, and an operating mechanism. The front side of the base is fixed to the outer cover with bolts. The operating mechanism is mounted on the front side of the base. A stationary contact is movably arranged inside the base. Two stationary contacts are located on the top of the stationary contact, and two moving contacts are located on one side of the stationary contact. Moving contacts are also located on one side of each of the two moving contacts. U-shaped plates are fixedly connected to the opposite sides of the two moving contacts, and a connecting assembly is provided between the two U-shaped plates. This utility model, by setting two stationary contacts and two moving contacts, and connecting the two sets of contacts in parallel, allows current to pass through both sets of contacts simultaneously, thereby reducing the current-carrying pressure of a single contact, reducing heat generation and wear. Rotating the handle moves four plug rods away from the two U-shaped plates, allowing for the disassembly and replacement of one of the moving contacts. This dual-redundant contact structure provides high safety performance.

Description

Technical Field

[0001] This utility model relates to the field of disconnector switch technology, and more specifically, to a dual-redundant contact structure for a disconnector switch. Background Technology

[0002] A disconnecting switch is an electrical switching device mainly used in power systems to isolate power sources, form a clear electrical disconnect point, ensure that the equipment under maintenance is completely isolated from live parts, form a visible disconnect gap, and ensure the safety of operators. It is commonly found in substations and power distribution systems, connected in series on both sides of a circuit breaker, or used to connect or disconnect unloaded lines, voltage transformers, etc.

[0003] A search revealed that Chinese patent CN220731393U discloses a disconnecting switch. By increasing the distance between the moving and stationary contacts and adding a boss structure, the boss structure forms a barrier, separating the two conductive parts that were originally not separated from the base with a cover. This transforms the electrical clearance into a creepage distance, which is >20mm after the barrier is applied. This creepage distance will not be broken down by 6KV. The insulation wire is improved, which also enhances the product's impact resistance performance and meets the performance requirements of 6KV products.

[0004] When the above-mentioned disconnecting switch is in use, the moving contact and the stationary contact are respectively equipped with moving contact and stationary contact. However, this structure is a single contact structure. During the opening and closing process, poor contact will cause the air between the contacts to be broken down, generating an electric arc. The high temperature of the electric arc will melt the contact surface, forming pits or burrs, which will aggravate poor contact. In severe cases, it may cause phase-to-phase short circuit or discharge to ground. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a dual redundant contact structure for a disconnecting switch, which aims to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dual-redundant contact structure for a disconnecting switch, comprising a base, an outer cover, and an operating mechanism. The front side of the base is fixed to the outer cover by bolts. The operating mechanism is installed on the front side of the base. A stationary contact is movably arranged inside the base. Two stationary contacts are provided on the top of the stationary contact. Two moving contacts are provided on one side of the stationary contact. Moving contacts are provided on one side of each of the two moving contacts. A U-shaped plate is fixedly connected to the opposite side of each of the two moving contacts. A connecting assembly is provided between the two U-shaped plates. The connecting assembly includes a connecting frame, positive and negative lead screws, two pressing plates, and multiple insert rods. Both ends of the positive and negative lead screws are movably connected to the connecting frame via bearings. Both pressing plates are threadedly connected to the positive and negative lead screws, and both sides of the two pressing plates are in contact with the connecting frame.

[0007] Furthermore, one end of each of the plurality of insert rods is fixedly connected to two extrusion plates, and the other end of each of the plurality of insert rods passes through two U-shaped plates.

[0008] Furthermore, handles are movably provided on the opposite side of the two extrusion plates, and the handles are fixedly sleeved on the positive and negative lead screws.

[0009] It can be seen that the above technical solution is designed to facilitate the rotation of the positive and negative lead screws.

[0010] Furthermore, both ends of the connecting frame are fixedly connected with locking blocks, and one end of each locking block extends into the interior of the two U-shaped plates.

[0011] It can be seen that the above technical solution aims to improve the stability between the two U-shaped plates and the connecting frame.

[0012] Furthermore, the stationary contact is provided with an adjustment assembly, which includes a sliding plate, a lead screw, two threaded sleeves, and a slide rod.

[0013] Furthermore, one side of the top of the slide plate is fixedly connected to the stationary contact, one end of the lead screw passes through the slide plate and is fixedly connected to the base, and both threaded sleeves are movably sleeved on the lead screw, with the opposite sides of the two threaded sleeves in contact with the slide plate.

[0014] Furthermore, the slide bar is located at the bottom of the lead screw, and one end of the slide bar passes through the slide plate and is fixedly connected to the base.

[0015] As can be seen, in the above technical solution, the slide plate slides on the slide bar, which can prevent the stationary contact from deflecting when moving horizontally.

[0016] The technical effects and advantages of this utility model are as follows: 1. This utility model sets two stationary contacts and two moving contacts, and the two sets of contacts are connected in parallel. Current can pass through both sets of contacts at the same time, thereby reducing the current carrying pressure of a single contact, reducing heat generation and wear. When one set of contacts has poor contact, the other set of contacts can still carry the full current, avoiding circuit interruption. Rotating the handle will move the four plug rods away from the two U-shaped plates, thereby releasing the fixation between the two U-shaped plates and the connecting frame, and allowing one of the moving contacts to be disassembled and replaced. The double redundant contact structure has high safety performance. 2. This utility model releases the fixation between the slide plate and the lead screw by rotating the threaded sleeve and moving it away from the slide plate. The slide plate can be moved horizontally, thereby driving the stationary contact to move horizontally. The distance between the two stationary contacts and the two moving contacts can be adjusted as needed. At the same time, the stationary contact can be disassembled and replaced. Similarly, the slide plate is pressed and fixed by the two threaded sleeves. The structure is simple and easy to use. Attached Figure Description

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the assembly structure of the base and moving contact of this utility model; Figure 3 This is a schematic diagram of the assembly structure of the moving contact and the moving contact point of this utility model; Figure 4 This is a schematic diagram of the assembly structure of the stationary contact and the adjustment component of this utility model; Figure 5 This is a schematic diagram of the connection component structure of this utility model.

[0019] In the diagram: 1. Base; 2. Outer cover; 3. Operating mechanism; 4. Stationary contact; 5. Stationary contact point; 6. Adjustment component; 7. Moving contact; 8. Moving contact point; 9. Connecting component; 10. U-shaped plate; 601. Slide plate; 602. Lead screw; 603. Threaded sleeve; 604. Slide rod; 901. Connecting frame; 902. Positive and negative lead screws; 903. Extrusion plate; 904. Insert rod; 905. Handle; 906. Locking block. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] Refer to the instruction manual appendix Figure 1-5This embodiment of a disconnector switch dual-redundant contact structure includes a base 1, an outer cover 2, and an operating mechanism 3. The front side of the base 1 is fixed to the outer cover 2 by bolts. The operating mechanism 3 is installed on the front side of the base 1. A stationary contact 4 is movably arranged inside the base 1. Two stationary contacts 5 are arranged on the top of the stationary contact 4. Two moving contacts 7 are arranged on one side of the stationary contact 4. Moving contacts 8 are arranged on one side of each of the two moving contacts 7. A U-shaped plate 10 is fixedly connected to the opposite side of the two moving contacts 7. A connecting assembly 9 is arranged between the two U-shaped plates 10. The connecting assembly 9 includes a connecting frame 901, a positive and negative lead screw 902, two pressing plates 903, and multiple insert rods 904. The two ends of the positive and negative lead screw 902 are movably connected to the connecting frame 901 by bearings. The two pressing plates 903 are threadedly connected to the positive and negative lead screw 902, and both sides of the two pressing plates 903 are in contact with the connecting frame 901.

[0022] Furthermore, one end of each of the multiple insertion rods 904 is fixedly connected to two extrusion plates 903, and the other end of each of the multiple insertion rods 904 passes through two U-shaped plates 10. A handle 905 is movably provided on the opposite side of the two extrusion plates 903, and the handle 905 is fixedly sleeved on the positive and negative lead screws 902. Both the front and rear ends of the connecting frame 901 are fixedly connected to the locking blocks 906, and one end of each locking block 906 extends into the interior of the two U-shaped plates 10.

[0023] Furthermore, the stationary contact 4 is provided with an adjustment component 6, which includes a slide plate 601, a lead screw 602, two threaded sleeves 603, and a slide rod 604. The top side of the slide plate 601 is fixedly connected to the stationary contact 4. One end of the lead screw 602 passes through the slide plate 601 and is fixedly connected to the base 1. The two threaded sleeves 603 are movably sleeved on the lead screw 602, and the opposite sides of the two threaded sleeves 603 are in contact with the slide plate 601. The slide rod 604 is located at the bottom of the lead screw 602, and one end of the slide rod 604 passes through the slide plate 601 and is fixedly connected to the base 1.

[0024] Rotating the threaded sleeve 603 away from the slide plate 601 releases the fixation between the slide plate 601 and the lead screw 602. Moving the slide plate 601 horizontally allows the stationary contact 4 to move horizontally. The distance between the two stationary contacts 5 and the two moving contacts 8 can be adjusted as needed. The stationary contact 4 can also be disassembled and replaced. Similarly, the slide plate 601 is pressed and fixed by the two threaded sleeves 603. The structure is simple and easy to use. At the same time, the slide plate 601 slides on the slide rod 604, which can prevent the stationary contact 4 from deflecting when moving horizontally.

[0025] The usage method of this embodiment is as follows: In use, by setting two stationary contacts 5 and two moving contacts 8, and connecting the two sets of contacts in parallel, current can pass through both sets of contacts simultaneously, thereby reducing the current-carrying pressure of a single contact, reducing heat generation and wear. If one set of contacts has poor contact, the other set of contacts can still carry the full current, preventing circuit interruption. The fixing between the base 1 and the outer cover 2 is released by bolts, and the handle 905 is rotated to drive the forward and reverse screws 902 to rotate. Since both extrusion plates 903 are threadedly connected to the forward and reverse screws 902, and the connecting frame 901 restricts the rotation of the two extrusion plates 903, the forward and reverse screws 902 can drive the two extrusion plates 902 to rotate. 3. The four insert rods 904 move away from the two U-shaped plates 10, thereby releasing the fixation between the two U-shaped plates 10 and the connecting frame 901. One of the moving contacts 7 is then disassembled and replaced. Similarly, the two moving contacts 7 are connected. The dual redundant contact structure provides high safety performance. At the same time, the two locking blocks 906 are inserted into the two U-shaped plates 10 respectively, which can improve the stability between the two U-shaped plates 10 and the connecting frame 901. It is worth noting that the wiring structure, reset spring, and boss structure on the base 1 are fully disclosed in the prior art and therefore are not shown in the drawings of this utility model specification.

[0026] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0027] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-redundant contact structure for a disconnecting switch, comprising a base (1), an outer cover (2), and an operating mechanism (3), wherein the front side of the base (1) is fixed to the outer cover (2) by bolts, and the operating mechanism (3) is mounted on the front side of the base (1), characterized in that: The base (1) is equipped with a stationary contact (4) inside. The top of the stationary contact (4) is provided with two stationary contact points (5). Two moving contacts (7) are provided on one side of the stationary contact (4). Moving contact points (8) are provided on one side of each of the two moving contacts (7). A U-shaped plate (10) is fixedly connected to the opposite side of each of the two moving contacts (7). A connecting assembly (9) is provided between the two U-shaped plates (10). The connecting assembly (9) includes a connecting frame (901), a positive and negative screw rod (902), two extrusion plates (903), and multiple insertion rods (904). The two ends of the positive and negative screw rod (902) are movably connected to the connecting frame (901) through bearings. The two extrusion plates (903) are threadedly connected to the positive and negative screw rod (902), and both sides of the two extrusion plates (903) are in contact with the connecting frame (901).

2. The dual-redundant contact structure of the disconnector switch according to claim 1, characterized in that: One end of each of the plurality of insert rods (904) is fixedly connected to two extrusion plates (903), and the other end of each of the plurality of insert rods (904) passes through two U-shaped plates (10).

3. The dual-redundant contact structure of the disconnector switch according to claim 1, characterized in that: A handle (905) is movably provided on one side of the two extrusion plates (903) facing each other, and the handle (905) is fixedly sleeved on the positive and negative lead screws (902).

4. The dual-redundant contact structure of the disconnector switch according to claim 1, characterized in that: Both ends of the connecting frame (901) are fixedly connected with card blocks (906), and one end of each card block (906) extends into the interior of the two U-shaped plates (10).

5. The dual-redundant contact structure of the disconnector switch according to claim 1, characterized in that: The stationary contact (4) is provided with an adjustment component (6), which includes a slide plate (601), a lead screw (602), two threaded sleeves (603) and a slide rod (604).

6. The dual-redundant contact structure of the disconnector switch according to claim 5, characterized in that: The top side of the slide plate (601) is fixedly connected to the stationary contact (4), and one end of the lead screw (602) passes through the slide plate (601) and is fixedly connected to the base (1). The two threaded sleeves (603) are movably sleeved on the lead screw (602), and the opposite sides of the two threaded sleeves (603) are in contact with the slide plate (601).

7. The dual redundant contact structure of the disconnector switch according to claim 5, characterized in that: The slide bar (604) is located at the bottom of the lead screw (602), and one end of the slide bar (604) passes through the slide plate (601) and is fixedly connected to the base (1).

Images