High-voltage isolating switch
By introducing the design of closed and open positions in the high-voltage disconnector, combined with elastic compression parts and limit structures, the problem of accidental contact of the connecting gate to close the circuit breaker is solved, achieving higher safety and stability.
Patent Information
- Application Number
- CN202422250455.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-09-13
AI Technical Summary
During the maintenance process of existing high-voltage disconnectors, there is a risk of closing the switch due to the small opening and closing angle of the connecting gate and the easy accidental touching, which affects safety.
A high-voltage disconnector is designed, including an insulating column, a conductive contact, a connecting knife switch and an elastic pressing piece. By setting the closing position and the opening position, the elastic pressing piece and the limit structure are used to ensure the stability of the connecting knife switch after closing, and prevent closing caused by accidental touch.
The stability of the connecting knife switch after closing is improved, the risk of closing due to accidental touch during maintenance is reduced, and safety is improved.
Smart Images
Figure CN223413990U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of electrical switches, in particular to a high-voltage isolating switch. Background Art
[0002] High-voltage disconnectors are crucial switchgear in the electrical systems of power plants and substations, required for use with high-voltage circuit breakers. Suitable for indoor installations operating at three-phase AC, 50Hz, and rated at 12kV, disconnectors are used to connect, disconnect, or switch circuits when voltage is present and load is present in high-voltage equipment. Their primary function is to ensure the safety of high-voltage electrical equipment and devices during maintenance work, isolating them from the voltage. They cannot be used to disconnect or switch on load current or interrupt short-circuit current, and are only suitable for certain switching operations that do not generate a strong arc; in other words, they lack arc extinguishing capabilities. Disconnectors are categorized as either indoor or outdoor, depending on the installation location, and as single-, double-, or triple-pole types, depending on the number of insulating legs. Options are available for each voltage level.
[0003] Currently, the switch of the disconnector needs to be opened for maintenance. However, since the opening and closing angle of the connecting gate at the switch is relatively small during the maintenance process, and the connecting gate is in a state where it can rotate freely after opening and closing, there is a risk of closing the switch during the maintenance process due to a small opening or being accidentally touched. Summary of the Invention
[0004] The purpose of the present utility model is to provide a high-voltage disconnect switch to solve the problems raised in the above background technology.
[0005] To achieve the above objectives, the present invention provides the following technical solutions:
[0006] A high-voltage disconnect switch comprises a mounting base and two insulating posts mounted on the mounting base, wherein a first conductive contact and a second conductive contact are fixed to the two insulating posts respectively;
[0007] It also includes a connecting knife switch, one end of which is rotatably mounted on a connecting piece fixed to the first conductive contact, and the other end of which is capable of connecting to the second conductive contact;
[0008] An elastic pressing piece is provided at a position of the connecting knife switch close to the connecting piece, and a closing position and an opening position are formed on the connecting piece. When the elastic pressing piece is located at the opening position, the placement angle of the connecting knife switch is greater than 90°.
[0009] As described above, in the high-voltage disconnector, a protrusion is formed on the connecting member at a position between the closing position and the opening position, and both sides of the protrusion are arranged in an arc shape.
[0010] As described above, the high-voltage disconnector: the elastic pressing member includes a pressing shaft that passes through a strip-shaped through-slot formed on the connecting knife switch, and both ends of the pressing shaft are connected to an elastic member installed on the connecting knife switch.
[0011] The high-voltage disconnect switch as described above: the elastic member includes a connecting sleeve rotatably connected to the pressure shaft and a movable column fixed to the connecting sleeve, the movable column passing through the limit plate installed on the connecting knife switch and being slidably connected relative to the limit plate;
[0012] It also includes a spring sleeved on the movable column, one end of the spring abuts against the extension ring fixed on the movable column, and the other end abuts against the limiting plate.
[0013] As described above, the high-voltage disconnector is further fixed with a pull ring on the connecting switch, and a hook is formed on one end of the pull ring. When the connecting switch is in the closed state, the hook is in a locked state with the second conductive contact.
[0014] As described above, in the high-voltage disconnector: an elastic clip with a U-shaped structure is rotatably mounted on the second conductive contact, and a slot is formed on the pull ring. When the connecting knife switch is in the closed state, the elastic clip can rotate relative to the second conductive contact to be snapped into the slot.
[0015] The high-voltage disconnect switch as described above: the locking groove is located on a side of the pull ring away from the hook.
[0016] Compared with the prior art, the beneficial effects of the present invention are: the connection of one end of the connecting knife switch is achieved through the provided connecting piece, and the closing position and the opening position are provided at the same time to achieve the limiting effect when the connecting knife switch is in the closing or opening position, ensuring the stability of the connecting knife switch after closing and the risk of closing during maintenance due to a small opening or being accidentally touched after opening, and high safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a structural diagram of the high-voltage disconnector after closing.
[0018] Figure 2 This is the front view of the high-voltage disconnect switch.
[0019] Figure 3 This is a structural diagram of the high-voltage disconnector after opening.
[0020] Figure 4 This is a schematic diagram of the structure of the connecting parts in the high-voltage disconnector.
[0021] Figure 5 for Figure 1 A magnified view of the structure at point A in the middle.
[0022] In the figure: 1-mounting seat, 2-insulating column, 3-first conductive contact, 4-connecting knife switch, 5-second conductive contact, 6-connecting piece, 601-closing position, 602-opening position, 603-raised position, 7-pressing shaft, 8-pulling ring, 801-hook, 802-slot, 9-connecting sleeve, 10-spring, 11-movable column, 12-limiting plate, 13-elastic clip. DETAILED DESCRIPTION
[0023] Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.
[0024] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.
[0025] In addition, numerous specific details are provided in the following specific examples to better illustrate the present application. Those skilled in the art will appreciate that the present application can be practiced without certain specific details. In some instances, methods, means, and components well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application.
[0026] The utility model aims to provide a high-voltage disconnector for eliminating the risk of the existing connection switch 4 closing during maintenance due to a small opening or being accidentally touched. The specific implementation method is as follows:
[0027] See also Figure 1-Figure 5 In an embodiment of the utility model, a high-voltage disconnector includes a mounting base 1 and two insulating columns 2 mounted on the mounting base 1, and a first conductive contact 3 and a second conductive contact 5 are fixed on the two insulating columns 2, respectively; it also includes a connecting knife switch 4, one end of the connecting knife switch 4 is rotatably mounted on a connecting piece 6 fixed to the first conductive contact 3, and the other end can be connected to the second conductive contact 5; an elastic pressing piece is provided at a position of the connecting knife switch 4 close to the connecting piece 6, and a closing position 601 and an opening position 602 are formed on the connecting piece 6. When the elastic pressing piece is in the opening position 602, the placement angle of the connecting knife switch 4 is greater than 90°, so that the connecting knife switch 4 has a force away from the closing direction due to its own weight.
[0028] In this embodiment, the connection of one end of the connecting knife switch 4 is achieved by setting a connecting piece 6, and the closing position 601 and the opening position 602 are set at the same time to realize the limiting effect when the connecting knife switch 4 is in the closing or opening position, ensuring the stability of the connecting knife switch 4 after closing and the risk of closing during maintenance due to a small opening or being accidentally touched after opening, thereby ensuring high safety.
[0029] Among them, it should be noted that the first conductive contact 3 and the second conductive contact 5 are both arranged in an L-shaped structure, and the connecting knife switch 4 is composed of two connecting plates, and a gap is formed between the two connecting plates. After the connecting knife switch 4 is closed, the conductive positions of the first conductive contact 3 and the second conductive contact 5 (along a vertically arranged section) can be in the gap and maintain abutment with the two connecting plates.
[0030] Furthermore, a protrusion 603 is formed on the connecting member 6 at a position between the closing position 601 and the opening position 602. The two sides of the protrusion 603 are arranged in an arc shape. The protrusion 603 is set to a certain extent to limit the elastic pressing member. When the connecting knife switch 4 needs to be rotated (closing or opening), the elastic force of the elastic pressing member needs to be overcome.
[0031] The elastic pressing member described above includes a pressure shaft 7 that passes through the strip-shaped through groove formed on the connecting knife gate 4, and both ends of the pressure shaft 7 are connected to the elastic member installed on the connecting knife gate 4. Exemplarily, in a specific embodiment, the elastic member includes a connecting sleeve 9 rotatably connected to the pressure shaft 7 and a movable column 11 fixed to the connecting sleeve 9, and the movable column 11 passes through the limit plate 12 installed on the connecting knife gate 4 and can be slidably connected relative to the limit plate 12; it also includes a spring 10 mounted on the movable column 11, one end of the spring 10 abuts against the extension ring fixed on the movable column 11, and the other end abuts against the limit plate 12.
[0032] It should be noted that, please refer to Figure 2 , the spring 10 is always in a compressed state. For example, when the connecting knife gate 4 is rotated from the closed state to the open state, the connecting knife gate 4 rotates in the counterclockwise direction. At this time, the raised position 603 generates an extrusion force on the pressure shaft 7, and the pressure shaft 7 moves toward the end of the connecting knife gate 4 away from the connecting piece 6, while driving the connecting sleeve 9 and the movable column 11 to move synchronously to squeeze the spring 10. When the connecting knife gate 4 is rotated to a vertical state and continues to be in a counterclockwise state, the spring 10 begins to reset, and finally the pressure shaft 7 is at the closed position 601 on the connecting piece 6, and at this time, the spring 10 is still in a certain degree of compression state, thereby realizing the limitation of the connecting knife gate 4 and eliminating the risk of closing during maintenance.
[0033] Furthermore, a pull ring 8 is fixed on the connecting knife switch 4, and a hook 801 is formed at one end of the pull ring 8. When the connecting knife switch 4 is in a closed state, the hook 801 and the second conductive contact 5 are in a clamped state. The pull ring 8 is arranged in a U-shaped structure, one end of which is fixed to the connecting knife switch 4, and a hook 801 is fixed on one side of the other end. After the hook 801 is clamped with the second guide contact 5, the connecting knife switch 4 can be limited to prevent poor contact between the connecting knife switch 4 and the second conductive contact 5.
[0034] Of course, the pull ring 8 also protrudes from the connecting knife switch 4 to facilitate the pulling action when the connecting knife switch 4 is opened. The pull ring 8 has a certain elastic deformation space, so that after the hook 801 contacts the second conductive contact 5, the pull ring 8 is deformed by external force to allow the hook 801 to pass over the second conductive contact 5.
[0035] In order to prevent the pull ring 8 from undergoing plastic deformation, which would reduce the contact area between the hook 801 and the second conductive contact 5 and affect the limiting effect, an elastic clip 13 with a U-shaped structure is also rotatably installed on the second conductive contact 5. A slot 802 is formed on the pull ring 8. When the connecting knife switch 4 is in the closed state, the elastic clip 13 can rotate relative to the second conductive contact 5 to be clamped into the slot 802. It should be noted that the slot 803 is located on the side of the pull ring 8 away from the hook 801, so that after the hook 801 on the pull ring 8 is clamped with the second conductive contact 5, further limiting is achieved by the elastic clip 13.
[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.
[0037] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
Claims
1. A high-voltage disconnect switch, comprising a mounting base (1) and two insulating columns (2) mounted on the mounting base (1), wherein a first conductive contact (3) and a second conductive contact (5) are respectively fixed on the two insulating columns (2); It is characterized by: It also includes a connecting knife switch (4), one end of which is rotatably mounted on a connecting piece (6) fixed to the first conductive contact (3), and the other end of which is capable of being connected to the second conductive contact (5); An elastic pressing member is provided at a position of the connecting knife switch (4) close to the connecting member (6), and a closing position (601) and an opening position (602) are formed on the connecting member (6). When the elastic pressing member is located at the opening position (602), the placement angle of the connecting knife switch (4) is greater than 90°.
2. A high voltage disconnect switch according to claim 1, characterized in that: A protruding position (603) is formed on the connecting member (6) at a position between the closing position (601) and the opening position (602), and two sides of the protruding position (603) are arranged in an arc shape.
3. A high voltage disconnect switch according to claim 1, characterized in that: The elastic pressing member comprises a pressing shaft (7) that passes through a strip-shaped through slot formed on the connecting knife gate (4), and both ends of the pressing shaft (7) are connected to an elastic member mounted on the connecting knife gate (4).
4. A high-voltage disconnect switch according to claim 3, characterized in that: The elastic member comprises a connecting sleeve (9) rotatably connected to the pressure shaft (7) and a movable column (11) fixed to the connecting sleeve (9); the movable column (11) passes through a limit plate (12) installed on the connecting knife switch (4) and can be slidably connected relative to the limit plate (12); It also includes a spring (10) sleeved on the movable column (11), one end of the spring (10) abuts against an extension ring fixed on the movable column (11), and the other end abuts against the limiting plate (12).
5. A high voltage disconnect switch according to claim 1, characterized in that: A pull ring (8) is also fixed to the connecting knife switch (4), and a hook (801) is formed at one end of the pull ring (8). When the connecting knife switch (4) is in a closed state, the hook (801) and the second conductive contact (5) are in a locked state.
6. A high voltage disconnect switch according to claim 5, characterized in that: An elastic clamping member (13) having a U-shaped structure is also rotatably mounted on the second conductive contact (5), and a clamping groove (802) is formed on the pull ring member (8). When the connecting knife switch (4) is in a closed state, the elastic clamping member (13) can rotate relative to the second conductive contact (5) to be clamped into the clamping groove (802).
7. A high-voltage disconnect switch according to claim 6, characterized in that: The locking groove (802) is located on a side of the pull ring member (8) away from the locking hook (801).