Fastening device for vacuum arc-extinguishing chamber and insulating pull rod assembly

Abstract

The utility model discloses a vacuum arc-extinguishing chamber and insulation pull rod assembly fastening device, which comprises an upper support, a vacuum arc-extinguishing chamber, a plastic support ring, a flexible connector, an insulation pull rod and a bottom plate base, the bottom plate base is connected with a fixed upright post, one side of the fixed upright post is connected with the flexible connector, the flexible connector is sleeved on the insulation pull rod, and the insulation pull rod is connected with the plastic support ring. A fixed stand column is arranged on the bottom plate base, an auxiliary sliding wrench is fixed at the upper end of the fixed stand column, the auxiliary sliding wrench positions the upper end of the insulating pull rod, a sliding stand column is arranged on the bottom plate base in a sliding mode, and a sliding wrench is connected to the side face of the sliding stand column. The extension end of the movable conducting rod of the vacuum arc-extinguishing chamber can be flexibly adjusted and clamped by using the sliding wrench assembly, and when the nut is fastened by using another wrench, the phenomena that the whole assembly is stressed without support, rotates along with rotation and is not firm in fastening when the nut is fastened by using double wrenches in the prior art are avoided.

Description

Technical Field

[0001] This utility model relates to the field of fastening fixtures for vacuum interrupters, specifically a fastening device for a vacuum interrupter and an insulating tie rod assembly. Background Technology

[0002] Indoor medium and high voltage vacuum circuit breakers are widely used as important switching equipment in the power industry. Among them, insulated cylinder pole type vacuum circuit breakers continue to occupy a major market position due to their economic and practical characteristics. The insulated cylinder pole type is assembled from an internal vacuum interrupter, an insulating tie rod assembly, and an external cylinder. Its internal disassembly and replacement, as well as its ease of maintenance and observation, are significant advantages that distinguish it from the one-piece cast-in-place solid-sealed pole type.

[0003] The vacuum interrupter and insulating tie rod assembly are the main components inside the insulating cylinder pole. Research on the reliability of the nut connection at the junction of the vacuum interrupter and the insulating tie rod can generally be improved by redesigning the internal connection structure of the device itself or designing auxiliary connection devices to improve the fastening process. Patent CN217035517U designs an insulating tie rod installation structure for a vacuum interrupter, connecting the lower pull rod of the insulating tie rod to a vertical tie rod. The vertical tie rod and the swing end of the mechanism's crank arm are hinged using a pin to prevent the tie rod nut from loosening due to vibration during the opening and closing of the mechanism. Patent CN212934479U designs a vacuum interrupter assembly and connection device, where the insulating tie rod is compressed by conductive posts, spring contacts, and moving contact supports to form spring pressure, ensuring a tight connection between the vacuum interrupter and the insulating tie rod. The design of the internal connection structure of devices is usually quite complex and inconvenient to assemble and disassemble, such as the design of insulating tie rods and vacuum interrupters. However, the industry has largely standardized and made these designs highly versatile. The design challenge of the auxiliary connection device lies in the fact that when tightening the vacuum interrupter and the insulating tie rod assembly, frictional forces during tightening of the external hexagonal nut can cause the flexible connection to rotate, affecting the subsequent installation of the insulating cylinder. Secondly, the lack of support for the overall rotational force of the assembly poses a risk of inadequate tightening of the nut, leading to vibration and loosening, ultimately affecting product characteristics. Therefore, the designed auxiliary connection device must have good positioning accuracy, convenient assembly and disassembly, practical adjustability, and reliable connection. Utility Model Content

[0004] The purpose of this invention is to provide a fastening device for a vacuum interrupter and an insulating tie rod assembly, which solves the problems of the flexible connection rotating and the nut not being properly tightened.

[0005] This utility model provides the following technical solution: a fastening device for a vacuum interrupter and an insulating tie rod assembly, comprising an upper bracket, a vacuum interrupter, a plastic support ring, a flexible connection, and an insulating tie rod. The vacuum interrupter is bolted to the upper bracket. The plastic support ring is sleeved and fixed on the vacuum interrupter. The insulating tie rod is threaded to the upper end of the vacuum interrupter. The device includes a base plate, on which a fixed column is connected. A flexible connection is connected to one side of the fixed column, and the flexible connection is sleeved on the insulating tie rod, located at the upper end of the vacuum interrupter. An auxiliary sliding wrench is fixed to the upper end of the fixed column, positioning the upper end of the insulating tie rod. A sliding column is slidably mounted on the base plate, and a sliding wrench is connected to the side of the sliding column, for inserting into the vacuum interrupter.

[0006] Furthermore, the base plate has an arc-shaped through hole, and the upper and lower ends of the through hole are provided with sliding grooves. A large slider and a small slider are respectively provided at the upper and lower ends of the sliding grooves. The sliding column is connected to the large slider, and an external hexagonal screw is connected between the large slider and the small slider. Through the through hole and the sliding groove, the large slider and the sliding column can move along the sliding groove, thereby adjusting the position of the sliding wrench.

[0007] Furthermore, a hexagonal nut is fitted onto the external hexagonal screw, and arc-shaped handles are rotatably connected to both sides of the hexagonal nut via pins. By pressing the arc-shaped handles together, the pressure on the hexagonal nut is increased, allowing the hexagonal nut to press the large slider and the base plate together, thereby fixing the large slider and the sliding column.

[0008] Furthermore, an arc-shaped comb plate is fixedly fitted onto the sliding column, and a cross-shaped slider is fitted onto the arc-shaped comb plate. The sliding wrench is inserted into the cross-shaped slider, and the top surface of the cross-shaped slider engages with the arc-shaped comb plate. The bottom of the cross-shaped slider is threaded with an external hexagonal screw, which is located at the lower end of the sliding wrench. Through the engagement of the arc-shaped comb plate and the cross-shaped slider, the movement of the cross-shaped slider further drives the sliding wrench to move, thereby expanding the adjustment range of the sliding wrench.

[0009] Furthermore, a fixing clamp and a cylinder are installed on the base plate. A sliding clamp is connected to the output end of the cylinder. The fixing clamp and the sliding clamp are located on both sides of the upper support. The movement of the sliding clamp is controlled by the extension and retraction of the cylinder to fix the upper support.

[0010] Furthermore, an L-shaped guide rail is formed on the base plate, and the L-shaped guide rail is distributed on both end faces of the sliding clamp block. The L-shaped guide rail guides the sliding clamp block to extend and retract, so that the sliding clamp block moves smoothly.

[0011] Furthermore, the upper support has arc-shaped connectors formed on both ends. The arc-shaped connector includes an arc surface and flat surfaces formed on both ends of the arc surface. The flat surfaces of the arc-shaped connector are inserted into the sliding clamp or the fixed clamp to fix the two ends of the upper support and prevent the upper support from rotating when tightened.

[0012] Furthermore, a flexible connection bracket is bolted to the fixed column, and a flexible connection support is bolted to the flexible connection bracket. The flexible connection is fixed to the flexible connection support. The flexible connection bracket and the flexible connection support fix the flexible connection in place, preventing the flexible connection from rotating due to friction.

[0013] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0014] (1) The extension and retraction of the sliding clamp block is controlled by the cylinder to fix the upper bracket, making it convenient and efficient to clamp when assembling the vacuum interrupter and the insulating tie rod. At the same time, fixing the upper bracket ensures good alignment of the upper bracket and the flexible connection in the initial installation position.

[0015] (2) By pressing the arc handle, the downward pressure is increased, and the large slider is locked together with the base plate, ensuring the stability of the sliding wrench. At the same time, by opening the arc handle, it is convenient to adjust the position of the large slider and the sliding column, and adjust the position of the sliding wrench.

[0016] (3) By setting an arc-shaped comb plate, the cross-shaped slider is engaged on the arc-shaped comb plate, and the sliding wrench is inserted into the cross-shaped slider, which further increases the adjustment range of the sliding wrench. At the same time, the sliding wrench always moves on a plane, so that the reference surface is accurately positioned and the consistency of the same batch of assembly is guaranteed. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a three-dimensional view of the entire utility model;

[0019] Figure 2 This is a perspective view of the present invention from another angle;

[0020] Figure 3 This is a perspective view of the upper support of this utility model;

[0021] Figure 4 This is a diagram of the clamping structure of the upper support of this utility model;

[0022] In the diagram: 1. Flexible connection support; 2. Flexible connection bracket; 3. Fixed column; 4. Base plate; 5. Fixed clamp; 6. L-shaped guide rail; 7. Sliding clamp; 8. Cylinder; 9. Two-position five-way air valve; 10. Small slider; 11. Pin; 12. Hex nut; 13. Large slider; 14. Arc-shaped handle; 15. External hexagonal screw; 16. Sliding wrench; 17. Cross-shaped slider; 18. Arc-shaped comb plate; 19. Sliding column; 20. Auxiliary sliding wrench; 21. Insulating pull rod; 22. Flexible connection; 23. Plastic support ring; 24. Vacuum interrupter; 25. Upper bracket; 251. Arc-shaped joint. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 and 2This utility model provides a technical solution: a fastening device for a vacuum interrupter and an insulating tie rod assembly, including an upper bracket 25, a vacuum interrupter 24, a plastic support ring 23, a flexible connection 22, and an insulating tie rod 21. The upper bracket 25 is fixed to the base plate 4 by fasteners. The vacuum interrupter 24 is bolted to the upper bracket 25. The plastic support ring 23 is sleeved and fixed to the vacuum interrupter 24. The insulating tie rod 21 is threaded to the upper end of the vacuum interrupter 24. The device includes a base plate 4. A fixed column 3, either integrally formed or screwed together, is fixedly mounted on the fixed column 3. A flexible connection bracket 2 is screwed onto the flexible connection bracket 2, and a flexible connection support 1 is screwed onto the flexible connection support 1. A flexible connection 22 is screwed onto the flexible connection support 1. The flexible connection 22 is fitted onto the threaded rod of the insulating tie rod 21. A nut is threaded onto the threaded rod of the insulating tie rod 21, and a washer and a gasket are also fitted onto it. The washer and gasket are placed on the flexible connection 22, and the flexible connection 22 is located at the upper end of the vacuum interrupter 24. The upper end of the fixed column 3 is fixed... An auxiliary sliding wrench 20 is provided to position the upper end of the insulating tie rod 21 and to position the overall height reference plane of the assembly. A sliding column 19 is slidably mounted on the base plate 4, and an arc-shaped groove is provided on the base plate 4. A sliding wrench 16 is connected to the side of the sliding column 19. The sliding column 19 slides within the arc-shaped groove to adjust the position of the sliding wrench 16. The sliding wrench 16 is used to insert into the vacuum interrupter 24 to adjust the nut on the screw of the vacuum interrupter 24 or the insulating tie rod 21. The nut is rotated by sliding the wrench 16, causing it to descend and press the flexible connection 22 onto the vacuum interrupter 24. Alternatively, the vacuum interrupter 24 is rotated by sliding the wrench 16, causing the screw of the insulating rod 21 to descend and pressing the nut on the screw onto the flexible connection 22. This secures the vacuum interrupter 24 and the insulating rod 21 together, improving the tightening efficiency. The connection between the flexible connection 22 and the fixed column 3 prevents the flexible connection 22 from rotating due to friction during tightening, thus avoiding any impact on the tightening efficiency.

[0025] The base plate 4 has an arc-shaped through hole, and the upper and lower ends of the through hole are provided with sliding grooves. The upper and lower ends of the sliding grooves are respectively provided with a large slider 13 and a small slider 10. The large slider 13 and the small slider 10 are respectively in the sliding grooves of the base plate 4. The sliding column 19 is connected to the large slider 13. The large slider 13 and the small slider 10 are connected by an external hexagonal screw 15. The movement of the large slider 13 and the small slider 10 will drive the sliding column 19 to move. Adjust the position of the sliding wrench 16 to facilitate the adjustment of the angle of the sliding wrench 16 and accurately connect it with the nut or vacuum interrupter 24.

[0026] A hexagonal nut 12 is fitted onto the external hexagonal screw 15. The two sides of the hexagonal nut 12 are rotatably connected to an arc-shaped handle 14 via a pin 11. The rotation of the arc-shaped handle 14 can increase the pressure of the arc-shaped handle 14 on the large slider 13, pressing the large slider 13 tightly onto the base plate 4, and fixing the position of the sliding column 19.

[0027] like Figure 2 As shown, an arc-shaped comb plate 18 is fixedly fitted onto the sliding column 19, and a cross-shaped slider 17 is fitted onto the arc-shaped comb plate 18. A sliding wrench 16 is inserted into the cross-shaped slider 17. The top surface of the cross-shaped slider 17 has teeth formed, which mesh with the arc-shaped comb plate 18. By moving the cross-shaped slider 17, the angle and position of the sliding wrench 16 can be adjusted, making it convenient for the sliding wrench 16 to be inserted into the nut or the vacuum interrupter 24. The bottom of the cross-shaped slider 17 is threaded with an external hexagonal screw 15, which is located at the lower end of the sliding wrench 16. By rotating the external hexagonal screw 15, the sliding wrench 16 is pressed tightly into the cross-shaped slider 17, preventing the sliding wrench 16 from moving back and forth. The cross-shaped slider 17 and the arc-shaped comb plate 18 mesh, and the arc-shaped comb plate 18 further expands the adjustment range of the sliding wrench 16.

[0028] A fixing clamp 5 and a cylinder 8 are installed on the base plate 4 by screws. A two-position five-way air valve 9 is installed on the base plate 4. The two-position five-way air valve 9 is connected to the cylinder 8 and controls the extension and retraction of the cylinder 8. A sliding clamp 7 is connected to the output end of the cylinder 8 by fasteners. The fixing clamp 5 and the sliding clamp 7 are located on both sides of the upper bracket 25. The fixing clamp 5 is attached to one end of the upper bracket 25. The extension and retraction of the cylinder 8 controls the movement of the sliding clamp 7. When the sliding clamp 7 moves to one end of the upper bracket 25, the fixing clamp 5 and the sliding clamp 7 clamp the upper bracket 25 and fix it to prevent the upper bracket 25 from rotating. At the same time, the clamping and positioning of the upper bracket 25 by the fixing clamp 5 and the sliding clamp 7 can ensure the alignment of the upper bracket 25 with the flexible connection 22.

[0029] like Figure 4 As shown, an L-shaped guide rail 6 is formed on the base plate 4. The L-shaped guide rail 6 is distributed on both ends of the sliding clamp 7. The L-shaped guide rail 6 guides the movement of the sliding clamp 7, making the movement of the sliding clamp 7 smoother.

[0030] like Figure 3 As shown, arc-shaped connectors 251 are formed on both ends of the upper support 25. The arc-shaped connector 251 includes an arc surface and flat surfaces formed on both ends of the arc surface. The flat surfaces of the arc-shaped connector 251 are inserted into the sliding clamp 7 or the fixed clamp 5. The flat surfaces of the arc-shaped connector 251 are attached to the side wall of the sliding clamp 7 or the fixed clamp 5 to reduce the movement of the upper support 25.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fastening device for a vacuum interrupter and an insulating tie rod assembly, comprising an upper bracket, a vacuum interrupter, a plastic support ring, a flexible connection, and an insulating tie rod, wherein the vacuum interrupter is bolted to the upper bracket, the plastic support ring is sleeved and fixed to the vacuum interrupter, and the insulating tie rod is threaded to the upper end of the vacuum interrupter, characterized in that: The device includes a base plate, on which a fixed column is connected. A flexible connector is connected to one side of the fixed column. The flexible connector is sleeved on an insulating tie rod and is located at the upper end of the vacuum interrupter. An auxiliary sliding wrench is fixed to the upper end of the fixed column. The auxiliary sliding wrench positions the upper end of the insulating tie rod. A sliding column is slidably mounted on the base plate, and a sliding wrench is connected to the side of the sliding column. The sliding wrench is used to insert into the vacuum interrupter.

2. The fastening device for a vacuum interrupter and insulating tie rod assembly according to claim 1, characterized in that: The base plate has an arc-shaped through hole, and the upper and lower ends of the through hole are provided with sliding grooves. The upper and lower ends of the sliding grooves are respectively provided with a large slider and a small slider. The sliding column is connected to the large slider, and the large slider and the small slider are connected by an external hexagonal screw.

3. The fastening device for a vacuum interrupter and insulating tie rod assembly according to claim 2, characterized in that: The external hexagonal screw is fitted with a hexagonal nut, and the two sides of the hexagonal nut are rotatably connected to arc-shaped handles via pins.

4. The fastening device for a vacuum interrupter and insulating tie rod assembly according to claim 1, characterized in that: An arc-shaped comb plate is fixedly fitted onto the sliding column, and a cross-shaped slider is fitted onto the arc-shaped comb plate. The sliding wrench is inserted into the cross-shaped slider, and the top surface of the cross-shaped slider engages with the arc-shaped comb plate. An external hexagonal screw is threaded to the bottom of the cross-shaped slider, and the external hexagonal screw is located at the lower end of the sliding wrench.

5. The fastening device for a vacuum interrupter and insulating tie rod assembly according to claim 1, characterized in that: A fixed clamping block and a cylinder are installed on the base plate. A sliding clamping block is connected to the output end of the cylinder. The fixed clamping block and the sliding clamping block are located on both sides of the upper support.

6. The fastening device for a vacuum interrupter and insulating tie rod assembly according to claim 5, characterized in that: The base plate is formed with L-shaped guide rails, which are distributed on both end faces of the sliding clamp.

7. The fastening device for a vacuum interrupter and insulating tie rod assembly according to claim 1, characterized in that: The upper support has arc-shaped connectors formed at both ends. The arc-shaped connector includes an arc surface and flat surfaces formed at both ends of the arc surface. The flat surfaces of the arc-shaped connector are inserted into the sliding clamp or the fixed clamp.

8. The fastening device for a vacuum interrupter and insulating tie rod assembly according to claim 1, characterized in that: A flexible connection bracket is bolted to the fixed column, and a flexible connection support is bolted to the flexible connection bracket. The flexible connection is fixed to the flexible connection support.

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