Limiting high-voltage switch

Abstract

The utility model belongs to the technical field of high-voltage switches, and particularly relates to a limiting high-voltage switch. Comprising a base, an insulator, an operation assembly, a limiting assembly and a contact, the operating assembly and the limiting assembly are installed on the base, the operating assembly is used for controlling the contact and the insulator to be in contact and separated, the operating assembly comprises an operating rod, an operating handle and a connecting piece, and the limiting assembly is used for limiting the rotating process of the operating rod; the operating rod is connected with the operating handle, the operating rod penetrates through the base and is rotatably arranged on the base, the connecting piece is installed on the operating rod, and the connecting piece is used for being connected with the insulator. According to the utility model, the rotation process of the operating rod is limited through the limiting assembly in practical application, thereby preventing the contact from damaging the insulator due to excessive rotation of the operating rod.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-voltage switches, and in particular relates to a limit high-voltage switch. Background Art

[0002] With the rapid development of power systems, demands for grid safety, reliability, and the automation level of electrical switchgear are constantly increasing. High-voltage switches are electrical devices with a rated voltage of 3kV and above, primarily used to open and close conductive circuits. The accuracy of the operating action and position status signals of high-voltage disconnectors and earthing switches directly affects the safe operation of the entire power grid.

[0003] The limited angle limit high-voltage switch with patent application number CN207116306U includes a crank box, a driving motor connected to the crank shaft installed in the crank box, and a blocking angle limit device is provided at the connection between the crank shaft and the driving motor. The beneficial effect of the utility model is that: since the blocking angle limit device is provided at the connection between the crank shaft and the driving motor, when the driving motor drives the crank shaft to realize opening and closing, the blocking angle limit device will block and limit their rotation angle, ensuring that it can only move within a limited angle, avoiding damage to the internal arc extinguishing chamber of the high-voltage switch caused by overshoot, misoperation, electromagnetic interference, etc., thereby ensuring the safe, stable and reliable operation of the high-voltage switch and eliminating the safety hazards of the power grid. The above-mentioned device controls the rotation angle of the crank shaft through the blocking angle limit device, and the limiting effect of the blocking angle limit device is limited. Therefore, it is urgent for those skilled in the art to solve the above technical problems. Utility Model Content

[0004] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art and provide a limit high-voltage switch. The limit high-voltage switch blocks the rotation process of the operating rod by means of a first limit rod and a second limit rod at the head end of the operating rod cooperating with a first limit piece and a second limit piece on the base. At the same time, a limit block piece at the tail end of the operating rod can also limit the rotation process of the operating rod. After the operating rod rotates to the standard process, the operating rod cannot continue to rotate due to the action of the limit assembly, thereby avoiding damage to the insulator caused by excessive rotation of the contacts.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A limit high-voltage switch comprises a base, an insulator, an operating assembly, a limit assembly and a contact; the operating assembly and the limit assembly are mounted on the base, the operating assembly is used to control the contact and separation of the contact and the insulator, the operating assembly comprises an operating rod, an operating handle and a connecting piece, the limit assembly is used to limit the rotation process of the operating rod; the operating rod is connected to the operating handle, the operating rod passes through the base and is rotatably arranged on the base, the operating rod is mounted on the connecting piece, and the connecting piece is used to connect to the insulator.

[0007] Furthermore, the limit assembly includes a first limit piece, a first limit rod, a second limit piece, a second limit rod and a limit block; the first limit rod and the second limit rod are welded to the head end of the operating rod; the first limit piece and the second limit piece both include a limit notch and a fixing screw hole, the first limit piece and the second limit piece are fixed to the base by bolts, the limit notch is matched with the first limit rod, and the first limit rod or the second limit rod is stopped when it rotates to the corresponding limit notch; the limit block is fixed to the tail end of the operating rod through a connecting hole.

[0008] Precise limit control ensures the operating lever rotates only within a safe range, effectively preventing equipment damage or safety incidents such as arcing and contact damage caused by excessive operation, greatly enhancing operational safety. The first and second limit levers are welded directly to the head of the operating lever, and the first and second limit members are bolted to the base. This structural design enhances the mechanical stability of the entire switch, reduces vibration and displacement, and maintains good performance even during long-term operation. The limit assembly is easy to understand and operate. When the limit position needs to be adjusted or maintenance is performed, it can be quickly completed by loosening or tightening the bolts, without the need for complex tools or specialized skills, reducing maintenance costs and time. The matching design of the limit notch and the limit lever strictly limits the rotation range of the operating lever, ensuring that the predetermined position is reached every time, improving operation accuracy and repeatability. This is particularly important for high-voltage switch applications requiring precise control. The limit stop is located at the end of the operating lever to prevent excessive movement of the operating lever due to external factors such as accidental collisions, providing additional protection and extending the service life of the device.

[0009] Furthermore, the limiting blocking piece is triangular in shape as a whole, and the limiting blocking piece is welded to the operating rod through a connecting hole.

[0010] The triangular structure itself has high stability. As the shape of the limit block, it can effectively disperse the force when subjected to external force, prevent deformation or displacement, and thus more stably limit the range of motion of the operating rod, ensuring the safety and accuracy of the switch operation. Compared with other shapes such as square or circle, the triangular shape may take up less space while providing sufficient blocking force. This is especially important for the design of electrical equipment with limited space, and helps to miniaturize and compact the equipment. The triangular limit block has a simple structure and is easy to process and manufacture. At the same time, it is fixed to the connection hole on the operating rod through welding. The installation process is direct and firm, which reduces the assembly steps, improves production efficiency, and is also convenient for on-site maintenance and replacement.

[0011] Furthermore, the connecting piece is connected to the bottom of the insulator, and a plurality of connecting pieces are provided on the operating rod.

[0012] By providing multiple connectors on the operating lever connected to the base of the insulator, the mechanical and electrical stresses can be evenly distributed, avoiding excessive load-bearing at any single point, significantly improving the stability and reliability of the connection and ensuring the insulation performance and safety of high-voltage currents. The multi-point connection design allows for smoother and more balanced rotation of the operating lever, maintaining good controllability even under high torque operation, reducing operating resistance, making the switch opening and closing action smoother, and extending the service life. If a connector needs to be repaired or replaced, the presence of multiple connection points allows it to be repaired one by one without having to disassemble the entire switch. This not only simplifies the maintenance process, but also reduces power outages caused by maintenance, improving the maintainability and flexibility of the system. For different installation environments and requirements, by adjusting the number and layout of connectors, it can be flexibly adapted to different insulator specifications or different installation conditions, increasing the versatility and adaptability of the design. The multi-point connection enhances the rigidity of the entire switch structure, especially when subjected to external forces (such as wind pressure and vibration), reducing the risk of structural deformation and ensuring the long-term stable operation of the high-voltage switch.

[0013] Furthermore, the operating handle is arranged at the head end of the operating rod, and an insulating sheath is provided on the operating handle.

[0014] Insulating sheaths can effectively prevent operators from getting electric shocks due to accidental touch during operation, which is especially important in high-voltage environments to ensure personnel safety. Insulating sheaths are usually made of wear-resistant, anti-aging, and comfortable-to-the-hand materials. They not only protect the operating handle, but also improve the comfort of operation and reduce fatigue from long-term operation. Insulating sheaths can also protect the operating handle from environmental factors such as moisture, chemical corrosion, and ultraviolet radiation, thereby extending the service life of the operating handle and reducing maintenance costs. In some cases, the color or markings of the insulating sheath can be used to distinguish switches with different functions or voltage levels, providing operators with intuitive visual guidance to avoid misoperation.

[0015] The utility model has the following beneficial effects:

[0016] By welding the first limit rod and the second limit rod to the head end of the operating rod, the limiting capacity of the high-voltage switch during opening and closing is preliminarily improved. The first limit rod and the second limit rod cooperate with the first limit piece and the second limit piece on the base to further improve the limiting capacity of the operating rod during rotation. When the operating rod rotates, the first operating rod can only rotate to the limiting notch of the first limit piece. When rotating in the opposite direction, the second limit rod can only choose to reach the limiting notch of the second limit piece. At the same time, a limiting block piece is also provided at the tail end of the operating rod. When the operating rod rotates excessively, the limiting block piece will contact with the base to hinder the rotation of the operating rod. The mutual cooperation of the limiting components is improved to improve the limiting capacity of the operating rod rotating to the end range when the high-voltage switch is opened and closed, and effectively avoids the phenomenon that the contact is damaged by the excessive rotation of the operating rod on the insulator.

[0017] The limit assembly has a simple structure and is easy to install and replace. When the limit assembly of the high-voltage switch fails, it does not need to be replaced as a whole, only the corresponding parts need to be disassembled and replaced, which saves costs.

[0018] The limit block is set in a triangular shape, which has good stability and can be replaced with a limit block of corresponding size according to needs, providing a further limiting effect without affecting the rotation of the operating lever. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the main view of the present utility model.

[0020] Figure 2 It is a left view of the present utility model.

[0021] Figure 3 It is a top view of the present utility model.

[0022] Figure 4 It is a bottom view of the present utility model.

[0023] Figure 5It is a structural diagram of the first limiting component of the utility model.

[0024] Figure 6 It is a structural diagram of the limit blocking piece of the utility model.

[0025] Among them are: 1-base; 2-insulator; 3-operating assembly; 31-operating handle; 32-operating rod; 33-connecting part; 4-limiting assembly; 41-first limiting rod; 411-first limiting part; 4111-limiting notch; 4112-fixing screw hole; 42-second limiting rod; 421-second limiting part; 43-limiting baffle; 431-connecting hole; 5-contact. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific preferred embodiments.

[0027] In the description of the present invention, it should be understood that the terms "left side," "right side," "upper," "lower," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Terms such as "first" and "second" do not indicate the importance of a component and therefore should not be construed as limiting the present invention. The specific dimensions used in this embodiment are merely for illustrative purposes and do not limit the scope of protection of the present invention.

[0028] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 It can be seen that a limit high-voltage switch includes a base 1 located at the bottom of the device, an operating rod 32 is provided on the base 1, the operating rod 32 passes through the base 1, an operating handle 31 is provided at the head end of the operating rod 32, a first limit rod 41 and a second limit rod 42 are respectively provided on both sides of the head end of the operating rod 31, the first limit rod 41 and the second limit rod 42 are welded to the operating rod 31, and a first limit member 411 and a second limit member 421 are also fixed on the base 1. A limit block 43 is provided at the tail end of the operating rod 31, and a plurality of connecting members 33 are provided on the middle section of the operating rod 31. The connecting member 33 is connected to the insulator 2, and a plurality of contacts 5 are provided on the insulator 2.

[0029] In one embodiment, when assembling, the base 1 is placed in a predetermined position to ensure that it is flat and stable, and the first limiting member 411 and the second limiting member 421 are fixed on the base 1. The first limiting member 411 and the second limiting member 421 are fixed by bolts to ensure that the first limiting member 411 and the second limiting member 421 are tightly combined with the base 1. The limiting notch 4111 is aligned with the first limiting rod 41 and the second limiting rod 42 at the head end of the operating rod 31. The operating rod 32 is passed through the reserved hole of the base 1 to ensure that it can rotate freely. The first limiting rod 411 is welded to the head end of the operating rod 32. 1 and the second limit rod 42, ensure that the welding is firm, install the operating handle 31 at the head end of the operating rod 31 to ensure comfortable and stable operation. The operating handle 31 is covered with an insulating anti-slip sleeve, and the limit block 43 is welded to the tail end of the operating rod 32 through the connection hole to ensure the correct position. Multiple connectors 33 are evenly installed on the middle section of the operating rod 32, and are tightly connected to the bottom of the insulator 2 to ensure stability and current conductivity. The insulator 2 is fixed in the predetermined position, and the connection with the operating rod 32 is stable through the connector 33. Install the contact 5 on the insulator 2 to ensure that the contact position corresponds accurately to facilitate opening and closing operations;

[0030] The foundation of the high-voltage switch is built on a base 1. The base 1 is the installation platform of the entire high-voltage switch, ensuring the stable installation and support of each component. The operating rod 32 is the core control component. It runs through the base 1 and allows the rotation of the operating rod 32 to control the opening and closing of the contacts 5. The head end of the operating rod 32 is equipped with an operating handle 31 for easy manual operation. The first limit rod 41 and the second limit rod 42 are welded on both sides of the head end of the operating rod 32. The first limit rod 41 and the second limit rod 42 interact with the first limit member 411 and the second limit member 421 on the base 1 to prevent excessive rotation and ensure that the operation is within a safe range. A limit block 43 is attached to the tail end of the operating rod 32 to further improve the limiting capacity of the limiting component 4. There are multi-point connectors 33 in the middle of the operating rod 32, which are connected to the bottom of the insulator 2. The design of the connector 33 disperses mechanical and electrical stresses, ensures insulation safety when current passes through, improves reliability, and facilitates maintenance and adaptability to different installation requirements. Contacts 5 are arranged on the insulator 2. They are the key to the opening and closing of the high-voltage circuit, and are achieved by controlling the contact and separation with the insulator 2 through the operating rod 32.

[0031] Reference Figure 5 It can be seen that the first limiting component 411 and the second limiting component 421 both include a limiting notch 4111 and a fixing screw hole 4112 .

[0032] In one embodiment, the first limiting member 411 is generally made of stainless steel or aluminum alloy to ensure mechanical strength and corrosion resistance. The first limiting member 411 is designed with a fixing screw hole 4112 and a limiting notch 4111, wherein the limiting notch 4111 is manufactured according to the diameters of the first limiting rod 41 and the second limiting rod 42, and is used to cooperate with the first limiting rod 41 and the second limiting rod 42. When in use, the staff rotates the operating rod 32 through the operating handle 31, and the first limiting rod 41 rotates to the end (that is, the limiting notch 4111 of the first limiting member 411) and is restricted by the limiting notch 4111 and cannot rotate further (the operating rod 32 drives the contact 5 and the insulator 2 to separate and combine, which is the existing technology and will not be repeated here), ensuring that the contact 5 will not cause damage to the insulator 2. When rotating in the opposite direction, the second limiting rod 42 will also be restricted by the limiting notch 4111 of the second limiting member 421 and cannot rotate further.

[0033] Reference Figure 6 It can be seen that the limiting blocks 43 are triangular in shape as a whole, and a connecting hole 431 that fits with the operating rod 32 is provided between the limiting blocks 43 .

[0034] In one embodiment, the size of the limit block 43 should precisely fit the tail end of the operating rod 32 to ensure that there is no gap. During design, the diameter of the operating rod and the size of the limit hole 431 need to be measured to ensure a tight fit after welding. Wear-resistant and corrosion-resistant stainless steel is selected to make the limit block 43 to ensure that it will not rust during long-term use. The connecting hole 431 is located in the middle of the limit block 43, aligned with the tail end of the operating rod 32, and is welded and fixed through this hole. The design of the connecting hole 431 needs to ensure that the welding point is stable and does not hinder the rotation of the operating rod. The distance between the limit block 43 and the base 1 is designed to allow the operating rod 32 to rotate to the end. When the operating rod 32 rotates further, the two ends of the limit block 43 contact the base 1 to prevent the operating rod 32 from continuing to rotate and play a limiting role. The limit block 43 is welded to the tail end of the operating rod 32 through the operating hole 41 to ensure that the welding point is smooth, straight and firm to avoid deformation caused by welding stress concentration or affecting the rotation of the operating rod 32. After installation, check whether there is a suitable gap between the limit block 43 and the base or the operating rod 32 to ensure that it can effectively contact and limit when the operating rod is excessively rotated. Adjust the welding position if necessary.

[0035] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the scope of protection of the present invention.

Claims

1. A limit high voltage switch, characterized in that: It includes a base, an insulator, an operating component, a limiting component and a contact; the operating component and the limiting component are installed on the base, the operating component is used to control the contact and separation of the contact and the insulator, the operating component includes an operating rod, an operating handle and a connecting piece, and the limiting component is used to limit the rotation process of the operating rod; the operating rod is connected to the operating handle, the operating rod passes through the base and is rotatably arranged on the base, the connecting piece is installed on the operating rod, and the connecting piece is used to connect to the insulator.

2. A limit high voltage switch according to claim 1, characterized in that: The limit assembly includes a first limit piece, a first limit rod, a second limit piece, a second limit rod and a limit block; the first limit rod and the second limit rod are welded to the head end of the operating rod; the first limit piece and the second limit piece both include a limit notch and a fixing screw hole, the first limit piece and the second limit piece are fixed to the base by bolts, the limit notch is matched with the first limit rod, and the first limit rod or the second limit rod is stopped from rotating when it rotates to the corresponding limit notch; the limit block is fixed to the tail end of the operating rod through a connecting hole.

3. A limit high voltage switch according to claim 2, characterized in that: The limiting blocking piece is in a triangular shape as a whole and is welded to the operating rod through a connecting hole.

4. The limit high-voltage switch according to claim 1, characterized in that: The connecting piece is connected to the bottom of the insulator, and a plurality of connecting pieces are provided on the operating rod.

5. The limit high-voltage switch according to claim 1, characterized in that: The operating handle is arranged at the head end of the operating rod, and an insulating sheath is provided on the operating handle.

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