High-voltage isolating switch for transformer substation

Abstract

The utility model discloses a transformer station high voltage isolation switch comprising a pedestal, a connection assembly, a knife switch assembly and a power assembly are arranged above the pedestal, and the power assembly drives the connection assembly and the knife switch assembly to be connected or disconnected. The connecting assembly comprises a copper base, a connecting plate and other structures, the knife switch assembly is composed of a connecting base, a ceramic base, a copper knife switch and the like, and the power assembly is driven by a hydraulic rod. By means of the inclined plane design of the inclined guide plate, the inclined guide plate can push the two sides of the copper base, the two sides of the copper base can be close to the copper knife switch, the copper knife switch can make close contact with the copper base, the contact area of the copper knife switch and the copper base is increased, meanwhile, the hollow design of the copper knife switch and the copper base can enable air to flow, the heat dissipation effect is ensured, and therefore resistance can be reduced; electric energy loss is effectively reduced, reliability and safety of equipment operation are improved, and the method is suitable for various transformer substation scenes.

Description

Technical Field

[0001] This utility model belongs to the field of substation disconnect switch technology, specifically relating to a substation high-voltage disconnect switch. Background Technology

[0002] In modern power systems, substation disconnect switches, as key equipment for isolating circuits, bear the important responsibility of cutting off circuits and protecting electrical equipment. When a power system fault occurs or maintenance is required, the disconnect switch can effectively disconnect the faulty part of the circuit from other normally operating circuits in a timely manner, thereby providing a solid guarantee for the safe and stable operation of the power system and the safety of personnel and equipment.

[0003] Currently, while widely used disconnecting switches can achieve basic circuit interruption functions, they still reveal many technical problems that urgently need to be solved during actual operation. Among these, the reliability of contact between the switch blade and the conductive clamp is particularly prominent. Because existing disconnecting switches lack an effective contact area guarantee mechanism, it is difficult to reliably ensure sufficient contact area between the switch blade and the conductive clamp during long-term use or frequent operation. This not only leads to a significant increase in contact resistance and increased power loss, but in severe cases, it may also cause localized overheating, thereby accelerating equipment aging and even threatening the safe and stable operation of the power system.

[0004] Given the technical bottlenecks in the contact performance of existing disconnecting switches, it is imperative to develop a new type of disconnecting switch that can effectively solve the problems of insufficient contact area and reduce contact resistance. Based on this, this utility model proposes a substation high-voltage disconnecting switch, aiming to fundamentally solve the aforementioned technical problems and improve the operational reliability and safety of the disconnecting switch through innovative structural design. Utility Model Content

[0005] To address the problems and shortcomings of the existing technology, this utility model provides a high-voltage disconnect switch for substations. Through the inclined design of the inclined guide plate, the inclined guide plate can push the two sides of the copper base, allowing the two sides of the copper base to approach the copper switch, thereby enabling the copper switch to make close contact with the copper base and increasing the contact area between the copper switch and the copper base.

[0006] This utility model is achieved through the following technical solution:

[0007] A substation high-voltage disconnect switch includes a base; a connecting component, a knife switch assembly, and a power component are disposed on the top of the base; the power component is mechanically connected to the connecting component and the knife switch assembly, and can drive the connecting component and the knife switch assembly to achieve a closed connection, forming a conductive path, or drive them to separate, achieving circuit disconnection. This basic structural design clearly defines the core components and basic functions of the disconnect switch. By driving the connecting component and the knife switch assembly through the power component, the on / off control of the circuit is achieved, laying the foundation for subsequent optimization design and ensuring that the disconnect switch can stably and reliably perform its core function of isolating the circuit.

[0008] Furthermore, the connecting assembly includes a copper base mounted on the upper surface of the base. Connecting plates are fixedly mounted on both the front and back of the copper base. The two connecting plates are fixed to the upper surface of the base by two screws. A conductive plate is fixedly mounted on the front of the copper base, and a wire-pressing screw is threaded onto the inner wall of the conductive plate. The copper base, as a key component of the connecting assembly, has excellent conductivity. The screw connection between the connecting plate and the base ensures a stable installation of the connecting assembly. The conductive plate, in conjunction with the wire-pressing screw, facilitates the connection of external circuits, and tightening the wire-pressing screw effectively ensures tight contact between the circuit and the conductive plate, reducing contact resistance and improving conductivity.

[0009] Furthermore, the switch assembly includes two connecting seats mounted on the upper surface of the base. A ceramic seat is rotatably mounted on one side of the two connecting seats that is close to each other via a rotating shaft. A copper switch is housed inside the ceramic seat. An inclined guide plate is fixedly mounted on both the front and back of the copper switch. Two insertion holes are provided on the front of both the copper switch and the ceramic seat. Two bolts are provided on the inner walls of the two sets of insertion holes, and a nut is threaded onto the outer surface of each bolt. The cooperation between the connecting seats and the rotating shaft allows the ceramic seat to rotate flexibly, providing a stable support structure for the opening and closing of the copper switch. The ceramic seat has good insulation properties, effectively preventing electric shock to operators and ensuring operational safety. As a conductive component, the copper switch, in conjunction with the inclined guide plate, is guided by the power component to more accurately contact the conductive plate of the connecting assembly, increasing the contact area and reducing contact resistance. The bolts and nuts facilitate the disassembly and maintenance of the copper switch and the ceramic seat.

[0010] Furthermore, the power assembly includes an L-shaped plate mounted on the left side of the base. A hydraulic rod is fixedly mounted on the right side of the L-shaped plate, and an insulating rod is fixedly mounted on the telescopic end of the hydraulic rod. A connecting rod is rotatably mounted on the right end of the insulating rod via a hinge, and the right end of the connecting rod is rotatably mounted to the left end of the ceramic seat. Using a hydraulic rod as the power source provides high driving force and smooth operation, reliably driving the switch assembly. The L-shaped plate provides a stable mounting base for the hydraulic rod. The insulating rod ensures operator safety during operation and prevents electric shock accidents. The hinged connecting rod converts the linear motion of the hydraulic rod into the rotation of the ceramic seat, realizing the opening and closing action of the switch assembly.

[0011] Furthermore, a horizontal plate is fixedly installed on the outer surface of the insulating rod. Two sliding holes are formed on the right side of the horizontal plate, and a sliding rod is slidably installed on the inner wall of each hole. The left end of each sliding rod is fixedly installed to the right side of the L-shaped plate. The cooperation between the horizontal plate and the sliding rod provides guidance and limitation for the movement of the insulating rod, allowing it to slide smoothly along the sliding rod under the drive of the hydraulic rod. This ensures the stability and accuracy of power transmission and further improves the reliability of the opening and closing action of the switch assembly.

[0012] Furthermore, the copper switch has two internal support bars, the outer surfaces of which are fixedly installed to the inner wall of the copper switch. The support bars enhance the structural strength of the copper switch, preventing deformation during long-term use or frequent operation, ensuring the stability and reliability of the contact between the copper switch and the conductive plate, and extending the service life of the disconnecting switch.

[0013] Furthermore, two sets of mounting holes are provided on the upper surface of the base, and two reinforcing strips are fixedly installed on the upper surface of the base. The bottom surface of each reinforcing strip is fixedly installed to the upper surface of the L-shaped plate. The mounting holes facilitate the installation and fixation of the disconnecting switch with other equipment in the substation; the reinforcing strips further connect and reinforce the L-shaped plate to the base, enhancing the stability of the power assembly installation, making the power assembly more stable during operation, and reducing the impact of factors such as shaking on the operational reliability of the disconnecting switch.

[0014] Furthermore, the surface of the conductive plate is coated with an anti-oxidation coating. This coating effectively prevents the conductive plate surface from reacting with oxygen in the air, avoiding a decrease in conductivity due to oxidation, ensuring the conductive plate maintains good conductivity over a long period, reducing maintenance frequency, and improving the efficiency of the disconnecting switch.

[0015] Furthermore, the surface of the inclined guide plate is provided with a wear-resistant layer. The wear-resistant layer can reduce the wear of the inclined guide plate during contact or separation from the conductive plate, extend the service life of the inclined guide plate, ensure the long-term stable guiding effect of the inclined guide plate on the copper switch, and thus ensure good contact between the copper switch and the conductive plate.

[0016] Furthermore, the bottom of the base is equipped with shock-absorbing rubber pads. These pads effectively absorb vibrations generated during the opening and closing of the disconnecting switch, reducing the impact of vibrations on the switch's structure and surrounding equipment, lowering the risk of component loosening due to vibrations, and improving the stability and reliability of the disconnecting switch's operation.

[0017] The beneficial effects of this utility model are:

[0018] The ceramic base can be rotated through the cooperation of hydraulic rods, insulating rods, and connecting rods, which in turn controls the rotation of the copper switch. This allows the copper switch to be inserted into and moved away from the copper base. Furthermore, the inclined guide plate design allows it to push the two sides of the copper base, bringing them closer to the copper switch. This ensures tight contact between the copper switch and the copper base, increasing the contact area. The hollow design between the copper switch and the copper base allows for airflow, ensuring heat dissipation and reducing resistance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram illustrating the overall structure of a substation high-voltage disconnector switch according to an embodiment of the present invention.

[0020] Figure 2 A three-dimensional structural schematic diagram of a side view illustrating one embodiment of a high-voltage disconnecting switch for a substation in this utility model;

[0021] Figure 3 This is a schematic diagram illustrating a sectionalizing structure of a high-voltage disconnecting switch for a substation, as described in this utility model.

[0022] Figure 4 A three-dimensional structural diagram of a power component used to illustrate an illustrative embodiment of a substation high-voltage disconnector switch in this utility model.

[0023] List of components and reference numerals:

[0024] 1. Base; 101. Mounting hole; 2. Connecting assembly; 201. Copper base; 202. Connecting plate; 203. Conductive plate; 204. Wire screw; 3. Knife switch assembly; 301. Connecting seat; 302. Ceramic base; 303. Bolt; 304. Insertion hole; 305. Copper knife switch; 306. Inclined guide plate; 307. Support bar; 4. Power assembly; 401. L-shaped plate; 402. Hydraulic rod; 403. Insulating rod; 404. Connecting rod; 405. Horizontal plate; 406. Sliding rod; 407. Sliding hole; 5. Reinforcing bar. Detailed Implementation

[0025] 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.

[0026] It should be noted that the directional terms such as left, right, up, down, front, and back in the embodiments of this utility model are only relative concepts or are based on the normal use state of the product, i.e., the direction of the product's movement, and should not be considered as limiting.

[0027] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of this utility model not only refer to changes in position, but also include movements such as rotation and rolling in which the position does not change relative to the position, but the state changes.

[0028] Finally, it should be noted that when a component is said to be "located on" or "set on" another component, it can be on the other component or may have an intervening component at the same time. When a component is said to be "connected to" another component, it can be directly connected to the other component or may have an intervening component at the same time.

[0029] like Figures 1 to 4 The high-voltage disconnecting switch for a substation shown includes a base 1, a connecting component 2 on top of the base 1, a knife switch component 3 on top of the base 1, and a power component 4 on the left side of the base 1.

[0030] Please see Figure 1 The connecting component 2 includes a copper base 201 mounted on the upper surface of the base 1. A connecting plate 202 is fixedly mounted on both the front and back of the copper base 201. The two connecting plates 202 are fixedly mounted to the upper surface of the base 1 by two screws. A conductive plate 203 is fixedly mounted on the front of the copper base 201. A wire clamping screw 204 is threadedly connected to the inner wall of the conductive plate 203. Through the cooperation of the wire clamping screw 204 and the conductive plate 203, the conductive plate 203 can be connected to the wire, and the copper base 201 can remain stable.

[0031] Please see Figure 3The switch assembly 3 includes two connecting seats 301 mounted on the upper surface of the base 1. A ceramic seat 302 is rotatably mounted on one side of the two connecting seats 301 that is close to each other via a rotating shaft. A copper switch 305 is provided inside the ceramic seat 302. An inclined guide plate 306 is fixedly mounted on both the front and back of the copper switch 305. Two insertion holes 304 are provided on the front of both the copper switch 305 and the front of the ceramic seat 302. Two bolts 303 are provided on the inner wall of the two sets of insertion holes 304. A nut is threaded onto the outer surface of each bolt 303. Through the cooperation of the connecting seats 301 and the ceramic seat 302, the ceramic seat 302 can control the rotation of the copper switch 305, and the copper switch 305 can be replaced using the bolts 303.

[0032] Please see Figure 2 and Figure 4 The power assembly 4 includes an L-shaped plate 401 installed on the left side of the base 1. A hydraulic rod 402 is fixedly installed on the right side of the L-shaped plate 401. An insulating rod 403 is fixedly installed at the telescopic end of the hydraulic rod 402. A connecting rod 404 is rotatably installed at the right end of the insulating rod 403 via a hinge. The right end of the connecting rod 404 is rotatably installed with the left end of the ceramic seat 302. The hydraulic rod 402 can push the insulating rod 403 to move, so that the insulating rod 403 can push the connecting rod 404 to move, thereby controlling the rotation of the ceramic seat 302 and controlling the copper switch 305.

[0033] Please see Figure 4 A horizontal plate 405 is fixedly installed on the outer surface of the insulating rod 403. Two sliding holes 407 are opened on the right side of the horizontal plate 405. A sliding rod 406 is slidably installed on the inner wall of each sliding hole 407. The left end of each sliding rod 406 is fixedly installed on the right side of the L-shaped plate 401. Through the cooperation of the sliding rod 406, the sliding hole 407 and the horizontal plate 405, the insulating rod 403 can be made more stable during movement, preventing the insulating rod 403 from becoming loose.

[0034] Please see Figure 3 The copper switch 305 has two support bars 307 inside. The outer surfaces of the two support bars 307 are fixedly installed to the inner wall of the copper switch 305. The support bars 307 can support the copper switch 305 and prevent the copper switch 305 from becoming loose.

[0035] Please see Figure 1 The upper surface of the base 1 has two sets of mounting holes 101. Two reinforcing strips 5 are fixedly installed on the upper surface of the base 1. The bottom surface of each reinforcing strip 5 is fixedly installed to the upper surface of the L-shaped plate 401. The L-shaped plate 401 can be reinforced by the reinforcing strips 5 to prevent the L-shaped plate 401 from becoming loose.

[0036] The implementation principle of a substation high-voltage disconnect switch according to this application embodiment is as follows: During use, the hydraulic rod 402 is activated, causing it to control the movement of the insulating rod 403. The insulating rod 403 drives the horizontal plate 405 to move. During the movement of the horizontal plate 405, it can move smoothly along the sliding rod 406 and the sliding hole 407, thereby controlling the movement of the connecting rod 404. During the movement of the connecting rod 404, it can control the rotation of the ceramic seat 302, which in turn drives the copper switch 305. The copper switch 305 is rotated so that it can be inserted into the copper base 201. As the copper switch 305 moves, it can also move the inclined guide plate 306, so that the inclined surface of the inclined guide plate 306 contacts the copper base 201 and applies a clamping force to the copper base 201. This allows the copper base 201 to contact the copper switch 305, increasing the contact area between the copper base 201 and the copper switch 305 and reducing the resistance. At the same time, the hollow design of the copper switch 305 and the copper base 201 allows air to flow and ensures heat dissipation.

[0037] In one embodiment, the substation high-voltage disconnect switch of this utility model is installed in a substation. The base 1 is fixed to the designated installation position in the substation through the mounting hole 101. The connecting plate 202 of the connecting assembly 2 is fixed to the base 1 using screws to ensure the copper base 201 is securely installed. External lines are fixed to the conductive plate 203 using wire clamping screws. In the switch assembly, the copper switch 305 is installed inside the ceramic base and fixed with bolts and nuts. An inclined guide plate 306 assists in the contact between the copper switch 305 and the conductive plate 203. The hydraulic rod 402 of the power assembly 4 is installed on the L-shaped plate 401 and connected to the ceramic base through the insulating rod 403 and connecting rod 404. During daily operation, when the circuit needs to be disconnected, the hydraulic rod is activated, pushing the insulating rod 403. The insulating rod 403, through the connecting rod 404, drives the ceramic seat to rotate, causing the copper switch 305 to separate from the conductive plate 203, thus disconnecting the circuit. When the circuit needs to be closed, the hydraulic rod 402 reverses its movement, and the copper switch 305, guided by the inclined guide plate 306, makes close contact with the conductive plate 203, forming a conductive path. During operation, the anti-oxidation coating of the conductive plate 203 effectively prevents oxidation, the wear-resistant layer of the inclined guide plate 306 reduces wear, and the shock-absorbing rubber pads of the base absorb vibration, ensuring the stable and reliable operation of the disconnecting switch.

[0038] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A high-voltage disconnect switch for a substation, characterized in that, It includes a base; a connecting component, a switch component, and a power component are provided on the top of the base; the power component is mechanically connected to the connecting component and the switch component, and can drive the connecting component and the switch component to close the connection and form a conductive path through power output, or drive the two to separate to disconnect the circuit.

2. A substation high-voltage disconnect switch according to claim 1, characterized in that, The connecting assembly includes a copper base mounted on the upper surface of the base. Connecting plates are fixedly mounted on both the front and back of the copper base. The two connecting plates are fixedly mounted to the upper surface of the base by two screws. A conductive plate is fixedly mounted on the front of the copper base, and a wire clamping screw is threaded onto the inner wall of the conductive plate.

3. A substation high-voltage disconnector according to claim 1, characterized in that, The switch assembly includes two connecting seats mounted on the upper surface of the base. A ceramic seat is rotatably mounted on one side of the two connecting seats that are close to each other via a rotating shaft. A copper switch is provided inside the ceramic seat. An inclined guide plate is fixedly mounted on both the front and back of the copper switch. Two insertion holes are provided on both the front of the copper switch and the front of the ceramic seat. Two bolts are provided on the inner wall of the two sets of insertion holes. A nut is threaded onto the outer surface of each bolt.

4. A substation high-voltage disconnect switch according to claim 3, characterized in that, The power assembly includes an L-shaped plate mounted on the left side of the base, a hydraulic rod fixedly mounted on the right side of the L-shaped plate, an insulating rod fixedly mounted on the telescopic end of the hydraulic rod, and a connecting rod rotatably mounted on the right end of the insulating rod via a hinge, the right end of the connecting rod being rotatably mounted to the left end of the ceramic base.

5. A substation high-voltage disconnect switch according to claim 4, characterized in that, A horizontal plate is fixedly installed on the outer surface of the insulating rod. Two sliding holes are opened on the right side of the horizontal plate. A sliding rod is slidably installed on the inner wall of each sliding hole. The left end of each sliding rod is fixedly installed to the right side of the L-shaped plate.

6. A substation high-voltage disconnector according to claim 3, characterized in that, The copper breaker is equipped with two support bars inside, and the outer surfaces of the two support bars are fixedly installed to the inner wall of the copper breaker.

7. A substation high-voltage disconnect switch according to claim 4, characterized in that, The upper surface of the base has two sets of mounting holes, and two reinforcing strips are fixedly installed on the upper surface of the base. The bottom surface of each reinforcing strip is fixedly installed to the upper surface of the L-shaped plate.

8. A substation high-voltage disconnect switch according to claim 2, characterized in that, The surface of the conductive plate is provided with an anti-oxidation coating.

9. A substation high-voltage disconnect switch according to claim 3, characterized in that, The surface of the inclined guide plate is provided with a wear-resistant layer.

10. A substation high-voltage disconnector according to claim 1, characterized in that, The base is equipped with shock-absorbing rubber pads at its bottom.

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