High-voltage disconnector

Abstract

The utility model discloses high -voltage isolator relates to the field of isolator, the utility model discloses a support frame, install first conductive end and second conductive end on the support frame, the top of first conductive end is hinged with conductive arm, and the conductive arm contains two groups of parallel conductive sheet, is provided with adjusting mechanism between two groups of conductive sheet, adjusting mechanism includes adjusting screw rod, and adjusting screw rod is through the installation groove and penetrates two groups of conductive sheet, is screwed on three groups of fastening nuts of adjusting screw rod, and three groups of fastening nuts and nut are respectively and tightly resist in the both sides of two groups of conductive sheet, the utility model discloses an adjusting mechanism, and the two groups of conductive sheet of conductive arm set up adjusting screw rod, and cooperate fastening nut and can adjust the interval flexibly, and the clamping force of accurate control is connected to the contact sheet, avoids the fluctuation of clamping force caused by long -term operation, and guarantees the stable of conductive contact, solves the problem of traditional high -voltage isolator and connects the stability problem of lacking.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switches, specifically high-voltage disconnecting switches. Background Technology

[0002] Intelligent high-voltage disconnect switches are core high-voltage electrical equipment in power systems. Their core function is to cut off the circuit and create a visible air gap when there is no current, thereby achieving electrical isolation and safety assurance. They consist of a main switch, an intelligent controller, sensors, and a communication interface. The opening and closing principle is the same as that of traditional disconnect switches, but with the added advantage of intelligence. They can remotely control the opening and closing, monitor operating parameters such as current and temperature in real time, perform fault diagnosis and early warning through the intelligent controller, and can also record and analyze data and have interlocking protection functions.

[0003] Current high-voltage disconnect switches can perform short-circuit operations on high-voltage circuits, but there is a problem in actual use. Specifically, during the traditional engagement of the conductive arm and the contact, the engagement stability changes as the short-circuit operation proceeds. This is mainly reflected in the change of the clamping force of the conductive arm on the contact. In view of this, the inventors urgently need to design a clamping force adjustment mechanism between the conductive arm and the contact point to improve the ease of use of the high-voltage disconnect switch. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a high-voltage disconnecting switch to solve the technical problem that the clamping force changes and the clamping stability decreases with the increase of the number of operations in the traditional clamping structure between the conductive arm and the contact.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-voltage disconnect switch, including a support frame, on which a first conductive end and a second conductive end are mounted. A conductive arm is hinged to the top of the first conductive end. The conductive arm includes two sets of parallel conductive plates. An adjustment mechanism is provided between the two sets of conductive plates. The adjustment mechanism includes an adjustment screw. The adjustment screw passes through the two sets of conductive plates through a mounting groove. Three sets of fastening nuts are threaded onto the adjustment screw. The three sets of fastening nuts and nuts are respectively pressed against both sides of the two sets of conductive plates. Anti-loosening washers are provided between the fastening nuts and the conductive plates for adjusting the distance between the two sets of conductive plates.

[0006] By adopting the above technical solution, the adjusting screw passes through the mounting groove through two sets of conductive plates. With the setting of three sets of fastening nuts, the distance between the two sets of conductive plates can be flexibly adjusted, thereby precisely controlling the clamping force of the conductive arm on the subsequent contact point. This effectively avoids the fluctuation of clamping force caused by long-term switching operations, ensuring that the conductive arm and the contact point always maintain stable and reliable conductive contact, and ensuring the continuity and stability of conductivity during the switching process of high-voltage circuits.

[0007] Furthermore, a snap-on contact piece is bolted to the top of the second conductive end. When the switch is in the open state, the two sets of conductive pieces in the conductive arm snap onto both sides of the snap-on contact piece.

[0008] By adopting the above technical solution, when the switch is in the closed state, the two sets of conductive plates in the conductive arm are snapped onto both sides of the contact plate. This double-sided snapping structure can increase the conductive contact area, reduce contact resistance, reduce power loss, and at the same time make the force on the conductive arm and the contact plate more uniform, avoid local overheating or wear caused by single-sided contact, and ensure the stability of the conductive process.

[0009] Furthermore, guide bevels are formed on both sides of the card contact piece to guide the conductive sheet to engage with the card contact piece.

[0010] By adopting the above technical solution, during the closing operation, the conductive plate of the conductive arm can smoothly slide along the guide slope to the locking position, and locking can be completed without precise alignment, which significantly reduces the difficulty of operation, improves the efficiency and accuracy of the closing operation, and reduces the risk of equipment damage or circuit failure caused by operational errors.

[0011] Furthermore, a transmission assembly is installed between the support frame and the conductive arm for opening and closing operations of the conductive arm. The transmission assembly includes a rotating rod, which is rotatably connected to the support frame, and a handle is installed at the end of the rotating rod.

[0012] By adopting the above technical solution, the rotating rod is rotatably connected to the support frame, ensuring smooth power transmission and effectively reducing the labor intensity of the staff. It is especially suitable for high-voltage disconnecting switch scenarios that require frequent operation. The setting of the transmission component makes the opening and closing action of the conductive arm more stable and controllable, avoiding uneven force or excessive action that may be caused by direct operation of the conductive arm, reducing impact damage to the hinge point of the conductive arm and related components, and ensuring the structural integrity of the equipment.

[0013] Furthermore, a first transmission arm is fixedly mounted on the rotating rod, and a second transmission arm is hinged to the other end of the first transmission arm, with the other end of the second transmission arm hinged to the conductive arm.

[0014] By adopting the above technical solution, the rotational power of the rotating rod can be accurately transmitted and converted into the opening and closing motion of the conductive arm. This ensures that the movement trajectory of the conductive arm is precise and controllable, avoids the movement deviation that may occur with a single transmission structure, and enables the conductive arm to accurately engage or disengage with the card contact piece. This ensures the reliability of the high-voltage circuit switching, avoids component deformation or damage caused by rigid connection, and extends the service life of the transmission components.

[0015] Furthermore, auxiliary engaging mechanisms are installed on both sides between the first and second transmission arms. Each auxiliary engaging mechanism includes a hanging column, which is fixed to both sides of the first and second transmission arms. A tension spring is connected between the hanging columns to provide a stabilizing force for the position of the conductive arm after the switch is opened or closed.

[0016] By adopting the above technical solution, in the closed state, the tension of the spring keeps the first transmission arm and the second transmission arm at a stable angle, thereby fixing the engagement position of the conductive arm and the contact piece, avoiding displacement of the conductive arm due to external vibration, electromagnetic interference or accidental contact, and ensuring the stability of the circuit path; in the open state, the spring can also provide stabilizing force to keep the conductive arm in the open position, preventing accidental closing and safety accidents.

[0017] Furthermore, an arc-extinguishing grid is installed on one side of the card contact piece and on the arc generation path.

[0018] By adopting the above technical solution, when the high voltage circuit is switched on or off, an electric arc is easily generated when the conductive arm contacts or separates from the card contact piece. The high temperature of the electric arc will burn the surface of the conductive parts, resulting in increased contact resistance and affecting conductivity. In severe cases, it may also cause insulation damage or short circuit accidents. The arc-extinguishing grid can use its special structure to quickly divide and cool the electric arc, shortening the burning time of the electric arc.

[0019] In summary, the present invention has the following main advantages:

[0020] 1. This utility model uses an adjustment mechanism with an adjustment screw between the two sets of conductive plates of the conductive arm. With the help of a fastening nut, the spacing can be flexibly adjusted, and the clamping force on the contact plate can be precisely controlled. This avoids fluctuations in clamping force caused by long-term operation, ensures stable conductive contact, and solves the problem of insufficient clamping stability of traditional high-voltage disconnect switches.

[0021] 2. In this utility model, the anti-loosening washer prevents the fastening nut from loosening, ensures the long-term stability of the adjustment gap, and avoids poor contact. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a top view of the structure of this utility model;

[0024] Figure 3 This is a side view of the structure of this utility model;

[0025] Figure 4 This utility model Figure 2 A magnified structural diagram of point A in the middle.

[0026] In the diagram: 1. Support frame; 201. First conductive end; 202. Second conductive end; 3. Conductive arm; 4. Contact plate; 5. Adjustment mechanism; 501. Mounting slot; 502. Adjusting screw; 503. Anti-loosening washer; 504. Fastening nut; 6. Transmission assembly; 601. Rotating rod; 602. First transmission arm; 603. Second transmission arm; 604. Handle; 7. Auxiliary locking mechanism; 701. Hanging column; 702. Tension spring. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In this embodiment:

[0029] High-voltage disconnect switches, such as Figure 1-4 As shown, the device includes a support frame 1, on which a first conductive end 201 and a second conductive end 202 are mounted. A conductive arm 3 is hinged to the top of the first conductive end 201. The conductive arm 3 includes two sets of parallel conductive plates. An adjustment mechanism 5 is provided between the two sets of conductive plates. The adjustment mechanism 5 includes an adjustment screw 502, which passes through the two sets of conductive plates via a mounting groove 501. Three sets of fastening nuts 504 are threaded onto the adjustment screw 502. The three sets of fastening nuts 504 and nuts are respectively pressed against both sides of the two sets of conductive plates, and anti-loosening washers 503 are provided between the fastening nuts 504 and the conductive plates to adjust the spacing between the two sets of conductive plates. The two sets of conductive plates pass through the mounting slot 501, and with the setting of three sets of fastening nuts 504, the spacing between the two sets of conductive plates can be flexibly adjusted, thereby precisely controlling the clamping force of the conductive arm 3 on the subsequent contact point. This effectively avoids the fluctuation of clamping force caused by long-term switching operations, ensuring that the conductive arm 3 and the contact point always maintain stable and reliable conductive contact, and ensuring the continuity and stability of conductivity during the switching process of the high-voltage circuit. At the same time, the anti-loosening washer 503 placed between the fastening nut 504 and the conductive plate can effectively prevent the nut from loosening due to vibration, electromagnetic interference and other factors under high-voltage environment, ensuring that the adjusted spacing remains stable for a long time, and avoiding poor contact or safety hazards caused by structural loosening.

[0030] See Figure 1The top of the second conductive end 202 is bolted with a snap-fit ​​contact piece 4. When the switch is closed, the two sets of conductive pieces in the conductive arm 3 snap-fit ​​onto both sides of the snap-fit ​​contact piece 4. This double-sided snap-fit ​​structure can increase the conductive contact area, reduce contact resistance, and reduce power loss. At the same time, it makes the force on the conductive arm 3 and the snap-fit ​​contact piece 4 more uniform, avoiding local overheating or wear caused by single-sided contact, and ensuring the stability of the conductive process. Meanwhile, this snap-fit ​​structure works in synergy with the adjustment mechanism 5. After the spacing of the conductive arm 3 is adjusted by the adjustment mechanism 5, it can form a suitable clamping force with the snap-fit ​​contact piece 4, further improving the snap-fit ​​stability and avoiding arcing or overheating problems caused by poor contact.

[0031] See Figure 1 Both sides of the contact plate 4 are formed with guide slopes to guide the conductive plate to engage with the contact plate 4. During the closing operation, the conductive plate of the conductive arm 3 can smoothly slide along the guide slope to the engagement position, and the engagement can be completed without precise alignment. This significantly reduces the difficulty of operation, improves the efficiency and accuracy of the closing operation, and reduces the risk of equipment damage or circuit failure due to operational errors. At the same time, the guide slope can disperse the impact force during the engagement process, avoid rigid collision between the conductive plate and the contact plate 4, reduce the wear of the components, and extend the service life of the conductive arm 3 and the contact plate 4.

[0032] See Figure 1 , Figure 3 A transmission assembly 6 is installed between the support frame 1 and the conductive arm 3 for opening and closing operations of the conductive arm 3. The transmission assembly 6 includes a rotating rod 601, which is rotatably connected to the support frame 1. A handle 604 is installed at the end of the rotating rod 601. The rotatable connection between the rotating rod 601 and the support frame 1 ensures smooth power transmission and effectively reduces the labor intensity of the workers. It is especially suitable for high-voltage disconnecting switch scenarios that require frequent operation. The setting of the transmission assembly 6 makes the opening and closing action of the conductive arm 3 more stable and controllable, avoiding uneven force or excessive action that may be caused by direct operation of the conductive arm 3. It reduces impact damage to the hinge point and related components of the conductive arm 3 and ensures the structural integrity of the equipment. At the same time, the rotatable connection between the rotating rod 601 and the support frame 1 has good wear resistance and stability. It is not easy to jam or loosen after long-term use, ensuring the long-term reliable operation of the transmission assembly 6. It further improves the convenience and accuracy of operation and avoids problems such as incomplete closing or incomplete opening caused by inconvenient operation.

[0033] See Figure 1 , Figure 3A first transmission arm 602 is fixedly mounted on the rotating rod 601. A second transmission arm 603 is hinged to the other end of the first transmission arm 602. The other end of the second transmission arm 603 is hinged to the conductive arm 3. This allows for precise transmission of the rotational power of the rotating rod 601, converting it into the opening and closing motion of the conductive arm 3. This ensures that the movement trajectory of the conductive arm 3 is precise and controllable, avoiding the movement deviation that may occur with a single transmission structure. It enables the conductive arm 3 to accurately engage or disengage with the contact piece 4, ensuring the reliability of the high-voltage circuit switching. This avoids component deformation or damage caused by rigid connections, extending the service life of the transmission assembly 6. At the same time, the multi-link transmission structure has a stronger load-bearing capacity and can effectively disperse the influence of external forces such as electromagnetic force and vibration under high-voltage conditions, ensuring the stability of power transmission. Even under complex working conditions, the conductive arm 3 can be opened and closed smoothly.

[0034] See Figure 1 , Figure 3 Auxiliary locking mechanisms 7 are installed on both sides between the first transmission arm 602 and the second transmission arm 603. The auxiliary locking mechanism 7 includes a hanging column 701, which is fixed on both sides of the first transmission arm 602 and the second transmission arm 603. A tension spring 702 is connected between the hanging columns 701 to provide a stabilizing force for the position of the conductive arm 3 after opening and closing. In the closed state, the tension of the tension spring 702 keeps the first transmission arm 602 and the second transmission arm 603 at a stable angle, thereby fixing the locking position of the conductive arm 3 and the locking contact piece 4, avoiding displacement of the conductive arm 3 due to external vibration, electromagnetic interference or accidental contact, and ensuring the stability of the circuit path. In the open state, the tension spring 702 can also provide a stabilizing force to keep the conductive arm 3 in the open position, avoiding accidental closing and safety accidents. At the same time, the tension spring 702 has good elastic recovery performance, can adapt to long-term frequent opening and closing operations, and is not prone to elastic fatigue or failure, ensuring the long-term reliable operation of the auxiliary locking mechanism 7.

[0035] See Figure 1 An arc-extinguishing grid is installed on one side of the card contact piece 4 and on the path of the electric arc. When the high-voltage circuit is switched on or off, an electric arc is easily generated when the conductive arm 3 contacts or separates from the card contact piece 4. The high temperature of the electric arc will burn the surface of the conductive parts, resulting in increased contact resistance and affecting conductivity. In severe cases, it may also cause insulation damage or short circuit accidents. The arc-extinguishing grid can quickly divide and cool the electric arc using its special structure, shortening the burning time of the electric arc. At the same time, the installation position of the arc-extinguishing grid is precisely aligned with the path of the electric arc, ensuring that the electric arc can be effectively captured and handled, preventing the electric arc from spreading to other parts of the equipment, reducing the safety risks caused by the electric arc, and ensuring the safe operation of the high-voltage circuit.

[0036] The implementation principle of this embodiment is as follows: the support frame 1 provides installation support for the overall structure, the first conductive end 201 and the second conductive end 202 serve as circuit connection endpoints, and the conductive arm 3 is hinged to the top of the first conductive end 201; during operation, the handle 604 in the transmission assembly 6 is rotated to drive the rotating rod 601 to rotate, and the first transmission arm 602 on the rotating rod 601 is linked with the second transmission arm 603, thereby driving the conductive arm 3 to realize the opening and closing action; when closing, the two sets of conductive plates of the conductive arm 3 are smoothly engaged under the guidance of the guide slopes on both sides of the contact plate 4 at the top of the second conductive end 202, and the adjustment mechanism 5 adjusts the contact plate 4 to achieve the opening and closing action. The screw 502 and the fastening nut 504 adjust the distance between the two sets of conductive plates to stabilize the locking force, and the anti-loosening washer 503 ensures the reliable connection of the adjustment structure. At the same time, the auxiliary locking mechanism 7 on both sides of the first transmission arm 602 and the second transmission arm 603 provides stabilizing force through the tension spring 702 on the hanging column 701 to ensure that the conductive arm 3 is fixed in position after closing. When opening, the handle 604 is operated in reverse, and the transmission component 6 drives the conductive arm 3 to disengage from the locking contact plate 4. The auxiliary locking mechanism 7 works synchronously to maintain the stability of the opening state. The electric arc generated during the closing process is handled by the arc extinguishing grid on one side of the locking contact plate 4.

[0037] In some other embodiments: a displacement sensor is installed on the conductive arm 3 to provide feedback on the current switch status to the control center and to display the status on an external display, thereby avoiding the potential risks of false connection and false disconnection.

[0038] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A high-voltage disconnect switch, characterized in that: The device includes a support frame (1), on which a first conductive end (201) and a second conductive end (202) are mounted. A conductive arm (3) is hinged to the top of the first conductive end (201). The conductive arm (3) includes two sets of parallel conductive plates. An adjustment mechanism (5) is provided between the two sets of conductive plates. The adjustment mechanism (5) includes an adjustment screw (502). The adjustment screw (502) passes through the two sets of conductive plates through the mounting groove (501). Three sets of fastening nuts (504) are threaded on the adjustment screw (502). The three sets of fastening nuts (504) and nuts are respectively pressed against the two sides of the two sets of conductive plates. Anti-loosening washers (503) are provided between the fastening nuts (504) and the conductive plates to adjust the distance between the two sets of conductive plates.

2. The high-voltage disconnector according to claim 1, characterized in that: The top end of the second conductive end (202) is bolted with a snap-on contact piece (4). When the switch is open, the two sets of conductive pieces in the conductive arm (3) snap onto both sides of the snap-on contact piece (4).

3. The high-voltage disconnector according to claim 2, characterized in that: Both sides of the card contact piece (4) are formed with guide slopes to guide the conductive sheet to engage with the card contact piece (4).

4. The high-voltage disconnector according to claim 1, characterized in that: A transmission assembly (6) is installed between the support frame (1) and the conductive arm (3) for opening and closing operations of the conductive arm (3). The transmission assembly (6) includes a rotating rod (601), which is rotatably connected to the support frame (1). A handle (604) is installed at the end of the rotating rod (601).

5. The high-voltage disconnect switch according to claim 4, characterized in that: A first transmission arm (602) is fixedly installed on the rotating rod (601), and a second transmission arm (603) is hinged to the other end of the first transmission arm (602). The other end of the second transmission arm (603) is hinged to the conductive arm (3).

6. The high-voltage disconnect switch according to claim 5, characterized in that: An auxiliary locking mechanism (7) is installed on both sides between the first transmission arm (602) and the second transmission arm (603). The auxiliary locking mechanism (7) includes a hanging column (701). The hanging column (701) is fixed on both sides of the first transmission arm (602) and the second transmission arm (603). A tension spring (702) is connected between the hanging columns (701) to provide a position stabilizing force after the conductive arm (3) is opened and closed.

7. The high-voltage disconnect switch according to claim 2, characterized in that: An arc-extinguishing grid is installed on one side of the card contact piece (4) and on the arc generation path.

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