A high-voltage disconnector

Abstract

A high-voltage isolating switch comprises a supporting structure, an isolating mechanism, a transmission mechanism and an operating mechanism arranged on the supporting structure, the transmission mechanism is connected with the isolating mechanism and the operating mechanism respectively; the isolating mechanism comprises at least one phase main circuit controlled synchronously, each phase main circuit comprises an isolating contact structure and a grounding contact structure, the transmission mechanism drives the isolating moving contact of the isolating contact structure and the grounding moving contact of the grounding contact structure to perform linear reciprocating motion under the driving of the operating mechanism to complete the opening and closing operation, when the isolating contact structure is closed, the grounding contact structure is opened synchronously, when the isolating contact structure is opened, the grounding contact structure is closed synchronously. The opening and closing of the isolating contact structure and the grounding contact structure of the isolating mechanism are driven by the transmission mechanism, and the opening and closing operation is linear reciprocating motion, so that the space occupied is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of disconnectors, in particular to a high-voltage disconnector. BACKGROUND

[0002] The high-voltage disconnector is an important switch electric appliance in the electrical system of power plants and substations, and the high-voltage disconnector plays a role of isolating voltage to ensure the safety of high-voltage electric appliances and devices during maintenance work. The existing high-voltage disconnector has two independent systems for isolation and grounding, and the two independent systems have high cost, poor coordination, and a reliable interlocking mechanism needs to be set between the two independent systems to avoid misoperation. In addition, the disconnector is realized by rotating the main circuit to realize the opening and closing action, and the main circuit is provided with a terminal and an insulator, at least one of which participates in rotation and is affected by torque or bending moment. Each phase main circuit has at least two insulators. Due to the need to meet the insulation distance requirement, too much space is occupied between phases or in the upper space, so that the overall structure is too large and the structure is too complex, and the installation quality is easily reduced due to poor coordination of the supporting structure. SUMMARY

[0003] The purpose of the present application is to overcome the defects of the prior art and provide a high-voltage disconnector with high installation quality and small space occupation.

[0004] To achieve the above purpose, the present application adopts the following technical scheme:

[0005] A high-voltage disconnector, comprising a support structure and an isolation mechanism, a transmission mechanism and an operating mechanism arranged on the support structure, the transmission mechanism is connected with the isolation mechanism and the operating mechanism in linkage; the isolation mechanism comprises at least one phase main circuit controlled synchronously, each phase main circuit comprises an isolation contact structure and a grounding contact structure, the transmission mechanism drives the isolation moving contact of the isolation contact structure and the grounding moving contact of the grounding contact structure to perform linear reciprocating motion to complete the opening and closing action under the driving of the operating mechanism, when the isolation contact structure is closed, the grounding contact structure is synchronized to open, and when the isolation contact structure is opened, the grounding contact structure is synchronized to close.

[0006] Further, the isolation contact structure comprises an isolation moving contact, a first isolation static contact and a second isolation static contact fixedly arranged, the grounding contact structure comprises a grounding moving contact and a grounding static contact, the grounding moving contact is connected with the isolation moving contact and can perform synchronous linear reciprocating motion, and the grounding static contact is fixed on the support structure;

[0007] When the isolation moving contact cooperates with the first isolation static contact and the second isolation static contact to make the isolation contact structure close, the grounding moving contact is separated from the grounding static contact, and the grounding contact structure is opened; when the isolation moving contact cooperates with only the second isolation static contact to make the isolation contact structure open, the grounding moving contact cooperates with the grounding static contact, and the grounding contact structure is closed.

[0008] Further, the main circuit of each phase further comprises an insulator, the isolation moving contact and the grounding moving contact are fixedly arranged on the insulator, and the transmission mechanism drives the insulator, the isolation moving contact and the grounding moving contact to move synchronously in a straight line.

[0009] Further, a first arc contact is arranged on the first isolation static contact, and the first arc contact is in contact with the isolation moving contact when the isolation contact structure is closed; a second arc contact is arranged on the second isolation static contact, and the second arc contact is always in contact with the isolation moving contact.

[0010] Further, the main circuit of each phase comprises an insulator, a conductive arm, the first isolation static contact, the second isolation static contact and the grounding static contact; the conductive arm is fixed on the insulator, the conductive arm comprises a long arm and a short arm, the long arm is coaxially arranged with the insulator as the isolation moving contact, one end of the short arm is connected with the long arm, and the other end of the short arm extends out of the insulator along the radial direction of the long arm as the grounding moving contact, one end of the first isolation static contact and the second isolation static contact is fixedly arranged and used for being connected with the busbar, the other end of the first isolation static contact and the second isolation static contact is provided with a through hole for the long arm to slide through to realize electrical connection, the grounding static contact, the second isolation static contact and the first isolation static contact are sequentially and spacedly arranged, the long arm passes through the through hole on the second isolation static contact, and the transmission mechanism drives the conductive arm to move linearly along the axis of the long arm between the first isolation static contact and the grounding static contact.

[0011] Further, the transmission mechanism comprises a transmission assembly and a lead screw, one end of the transmission assembly is connected with the driving connecting rod of the operating mechanism in linkage, the other end of the transmission assembly is connected with the lead screw in linkage, the lead screw is rotationally matched with the supporting structure, and one end of the lead screw is connected with the isolation mechanism, when the driving connecting rod of the operating mechanism rotates, the lead screw drives the isolation mechanism to move linearly under the driving of the transmission assembly.

[0012] Further, the transmission assembly comprises two chain wheels and a transmission chain connected with the two chain wheels in linkage, or the transmission assembly comprises two gears and a transmission belt connected with the two gears in linkage.

[0013] Furthermore, the transmission mechanism also includes a guide structure, which includes at least one guide post. The guide post is disposed on one side of the lead screw, one end of the guide post is fixedly connected to the isolation mechanism, and the other end of the guide post can slide through the second mounting hole disposed on the support structure. Balance springs are sleeved on the outside of both the lead screw and the guide post.

[0014] Furthermore, the isolation mechanism includes a connecting base and a multi-phase main circuit. Each phase main circuit also includes an insulator, which is fixedly mounted on the connecting base, and the insulators of the multi-phase main circuit are spaced apart.

[0015] Furthermore, the support structure includes a support member and a support column, which are vertically fixed in a T-shape. The operating mechanism and the support column are located on one side of the support member, while the isolation mechanism and the transmission mechanism are located on the other side of the support member. The connecting base of the isolation mechanism is parallel to and spaced apart from the support member. The transmission mechanism includes a lead screw, which is connected to the support member and the connecting base. The support structure is provided with a first assembly hole that is threadedly connected to the lead screw. When the lead screw drives the support member to perform linear reciprocating motion, it can rotate into the support column through the first assembly hole.

[0016] This invention discloses a high-voltage disconnecting switch in which the opening and closing of the isolating contact structure and the grounding contact structure of the isolating mechanism are both driven by a transmission mechanism. Unlike the existing main circuit rotation opening and closing action, the opening and closing actions of the isolating moving contact and the isolating moving contact are both linear reciprocating motions with the transmission mechanism, avoiding the occupation of space between phases and above the busbar. There is no need to set up a complex interlocking structure between the isolating contact structure and the grounding contact structure, which solves the problem of product performance being affected by poor coordination of the interlocking structure. Its overall structure is simple, the coordination of each mechanism is convenient, and it is conducive to improving the installation quality.

[0017] In addition, the multi-phase main circuits share a common connecting base, and insulators for each phase of the main circuit are set at intervals on the connecting base. The isolating moving contact and the grounding moving contact are directly connected together and fixed on the insulator. The insulator moves linearly back and forth with the connecting base, avoiding the influence of torque or bending moment. In addition, only one insulator is set for each phase of the main circuit, which helps to reduce the overall volume and reduce costs.

[0018] In addition, the conductive arm integrates the isolating moving contact and the grounding moving contact, which helps to ensure the consistency of the operation of the isolating contact structure and the grounding contact structure; the transmission component consists of two gears cooperating with the transmission belt or two sprockets cooperating with the transmission chain, which reduces the wear of parts during the transmission process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a high-voltage disconnect switch according to the present invention;

[0020] Figure 2This is a schematic diagram of the structure of a high-voltage disconnector of the present invention (the disconnector contact structure is closed, and the grounding contact is open);

[0021] Figure 3 yes Figure 2 Side view;

[0022] Figure 4 This is a schematic diagram of the structure of a high-voltage disconnector of the present invention (the disconnector contact structure is open, and the grounding contact is closed);

[0023] Figure 5 yes Figure 4 Side view;

[0024] Figure 6 This is a schematic diagram of the isolation mechanism in a high-voltage disconnect switch according to the present invention;

[0025] Figure 7 This is a side view of the isolation mechanism in a high-voltage disconnect switch according to the present invention;

[0026] Figure 8 This is a schematic diagram of the transmission component in a high-voltage disconnect switch according to the present invention. Detailed Implementation

[0027] The following is in conjunction with the appendix Figures 1 to 8 The given embodiments further illustrate specific implementations of a high-voltage disconnecting switch according to the present invention. The high-voltage disconnecting switch of the present invention is not limited to the descriptions in the following embodiments.

[0028] A high-voltage disconnecting switch includes a support structure 3 and an isolation mechanism 1, a transmission mechanism 2, and an operating mechanism 4 disposed on the support structure 3. The transmission mechanism 2 is linked to the isolation mechanism 1 and the operating mechanism 4 respectively. Under the drive of the operating mechanism 4, the transmission mechanism 2 can drive the isolation mechanism 1 to reciprocate along the axial direction of the support structure 3. The isolation mechanism 1 includes at least one phase main circuit that is controlled synchronously. Each phase main circuit includes an isolation contact structure and a grounding contact structure. Under the drive of the operating mechanism 4, the transmission mechanism 2 drives the isolation moving contact 11 of the isolation contact structure and the grounding moving contact 14 of the grounding contact structure to perform linear reciprocating motion to complete the opening and closing action. When the isolation contact structure is closed, the grounding contact structure is opened synchronously, and when the isolation contact structure is opened, the grounding contact structure is closed synchronously.

[0029] The present invention discloses a high-voltage disconnecting switch in which the opening and closing of the isolating contact structure and the grounding contact structure of the isolating mechanism 1 are driven by the transmission mechanism 2. Unlike the existing main circuit rotation opening and closing action, the opening and closing action of the isolating moving contact 11 is carried out by the transmission mechanism 2 in a linear reciprocating motion, avoiding the occupation of space between phases and above the busbar. There is no need to set up a complex interlocking structure between the isolating contact structure and the grounding contact structure, which solves the problem of product performance being affected by poor coordination of the interlocking structure. Its overall structure is simple, the coordination of each mechanism is convenient, and it is conducive to improving the installation quality.

[0030] Combination Figures 1-8 This document details an embodiment of a high-voltage disconnecting switch, which includes a support structure 3 and an isolation mechanism 1, a transmission mechanism 2, and an operating mechanism 4 disposed on the support structure 3. Figure 2 , 4 The supporting structure 3 includes a support column 32 and a support member 31. The support column 32 and the support member 31 are vertically fixed in a T-shape. Of course, the support column 32 and the support member 31 can also be connected in a cross shape, or the supporting structure 3 can be other structures that can provide support. In this embodiment, the operating mechanism 4 and the support column 32 are located on one side of the support member 31, and the isolation mechanism 1 and the transmission mechanism 2 are located on the other side of the support member 31. The isolation mechanism 1 and the operating mechanism 4 are linked together through the transmission mechanism 2. Under the drive of the operating mechanism 4, the transmission mechanism 2 can drive the isolation mechanism 1 to perform linear reciprocating motion, which is shown in the figure as linear reciprocating motion along the axial direction of the support column 32.

[0031] like Figures 2-7 As shown, the isolation mechanism 1 includes a connecting base 19 and at least one phase main circuit. The connecting base 19 and the support member 31 are arranged parallel to each other at intervals. Preferably, a multi-phase main circuit is set on the connecting base 19 so that the multi-phase main circuit can be synchronously controlled by the same connecting base 19. In this embodiment, a three-phase main circuit is set on the same connecting base 19. Each phase main circuit corresponds to one phase of the three-phase busbars A, B, and C. The same phase busbars are arranged parallel to each other on both sides of the high-voltage disconnecting switch, and the current directions in the parallel busbars are opposite. Each phase busbar includes an upper busbar and a lower busbar. Each phase main circuit includes an insulator 18, an isolation contact structure, and a grounding contact structure. The insulator 18 is fixedly set on the side of the connecting base 19 facing away from the operating mechanism 4.

[0032] The isolation contact structure includes an isolation moving contact 11, a first isolation stationary contact 12, and a second isolation stationary contact 13. The first isolation stationary contact 12 and the second isolation stationary contact 13 are spaced apart and connected to the upper busbar and lower busbar respectively. Specifically, the first isolation stationary contact 12 and the second isolation stationary contact 13 can be welded or threaded to the upper busbar and lower busbar. Furthermore, the first isolation stationary contact 12 and the second isolation stationary contact 13 can also be formed from the ends of the upper busbar and lower busbar respectively. The grounding contact structure includes a grounding moving contact 14 and a grounding stationary contact 15. The grounding moving contact 14 is connected to the isolation moving contact 11 and can move synchronously in a linear reciprocating motion. The grounding stationary contact 15 is fixed to the support structure 3. Under the drive of the transmission mechanism 2, when the isolation moving contact 11 simultaneously cooperates with the first isolation stationary contact 12 and the second isolation stationary contact 13 to close the isolation contact structure, the grounding moving contact 14 separates from the grounding stationary contact 15, and the grounding contact structure opens (see...). Figure 2 , 3 When the isolating moving contact 11 cooperates only with the second isolating stationary contact 13 to open the isolating contact structure, the grounding moving contact 14 cooperates with the grounding stationary contact 15 to close the grounding contact structure (see...). Figure 4 , 5 ).

[0033] Preferably, in this embodiment, the isolating moving contact 11 and the grounding stationary contact 14 are connected together and fixedly mounted on the insulator 18. The transmission mechanism 2 drives the insulator 18, the isolating moving contact 11, and the grounding moving contact 14 to move synchronously in a linear reciprocating motion. The first isolating stationary contact 12, the second isolating stationary contact 13, and the grounding stationary contact 15 are fixedly mounted. Preferably, the grounding stationary contact 15 is mounted on the support member 31, and the second isolating stationary contact 13 and the first isolating stationary contact 12 are arranged sequentially above the grounding stationary contact 15 from bottom to top. Thus, under the drive of the transmission mechanism 2, the isolating moving contact 11 can move linearly reciprocating between the first isolating stationary contact 12 and the second isolating stationary contact 13, and the grounding moving contact 14 moves linearly reciprocating above the grounding stationary contact 15. When the isolating moving contact 11 simultaneously engages with the first isolating stationary contact 12 and the second isolating stationary contact 13, the isolating contact structure closes, the grounding moving contact 14 separates from the grounding stationary contact 15, and the grounding contact structure opens (see...). Figure 2 , 3 When the isolating moving contact 11 is only in contact with the second isolating stationary contact 13, the grounding moving contact 14 and the grounding stationary contact 15 cooperate to achieve synchronous closing of the grounding contact structure (see...). Figure 4 , 5 ).

[0034] The opening and closing action of the isolating contact structure and the grounding contact structure is a linear reciprocating motion. Compared with the existing rotary opening and closing method, this opening and closing method has a simple overall structure, avoids occupying the space between phases of each main circuit and the space above the busbar during the rotation process, and the coordination process is simple, which is conducive to improving the overall assembly quality of the product. At the same time, the multi-phase main circuit is set on the same connecting base 19, which ensures the consistency of the operation of the multi-phase main circuit.

[0035] Preferably, both the first isolating stationary contact 12 and the second isolating stationary contact 13 are provided with an arc contact. One of the arc contacts is always connected to the isolating moving contact 11, and the other arc contact is connected to the isolating moving contact 11 when the isolating contact structure is closed, so as to effectively extinguish the electric arc generated when the isolating contact mechanism is opened and closed. Preferably, the arc contact is made of arc-resistant alloy material.

[0036] Combination Figures 2-7 A specific structure of an isolation mechanism 1 is provided. The isolation mechanism 1 includes a connecting base 19 and a three-phase main circuit. The connecting base 19 is located above and parallel to the support member 31. The three-phase main circuit is located on the side of the connecting base 19 facing away from the support member 31. Each of the three-phase main circuits includes an insulator 18, a conductive arm, a first isolating stationary contact 12, a second isolating stationary contact 13, and a grounding stationary contact 15. The insulators 18 in the three-phase main circuit are evenly spaced. The conductive arm is fixedly mounted on the insulator 18 and is composed of an integrally formed long arm and a short arm. The structure is shaped such that one end of the long arm and one end of the short arm are connected and fixed to the insulator 18. The long arm is coaxially arranged with the insulator 18 as an isolating moving contact 11, and is arranged in a direction parallel to the support column 32. One end of the short arm is connected to the long arm, and the other end of the short arm extends radially out of the insulator 18 as a grounding moving contact 14. One end of the first isolating stationary contact 12 and the second isolating stationary contact 13 are fixedly arranged and are respectively used to connect to the busbar. The other end of the first isolating stationary contact 12 and the second isolating stationary contact 13 are provided with a through hole for the long arm to slide through to achieve electrical connection. A contact finger spring is installed in the through hole.

[0037] like Figure 3 , 5 As shown, the grounding stationary contact 15, the second isolating stationary contact 13, and the first isolating stationary contact 12 are arranged alternately from bottom to top. The grounding moving contact 14 is fixed to the lower part of the isolating moving contact 11. The grounding stationary contact 15, the second isolating stationary contact 13, and the first isolating stationary contact 12 are arranged alternately. A long arm passes through a hole in the second isolating stationary contact 13. The transmission mechanism 2 drives the conductive arm to move linearly back and forth between the first isolating stationary contact 12 and the grounding stationary contact 15 along the axial direction of the long arm. See also Figure 2The grounding stationary contact 15 includes two parallel metal rods. One end of the two metal rods is connected to and fixed to the support member 31, and the other end of the two metal rods forms a mating gap. (See [reference]). Figure 3 The other end of the metal rod corresponds to the middle of the insulator 18. When the transmission mechanism 2 moves linearly upward along the support column 32, the isolating moving contact 11 simultaneously engages with the first isolating stationary contact 12 and the second isolating stationary contact 13. At this time, the grounding moving contact 14 separates from the grounding stationary contact 15, and the grounding contact structure opens. See also Figure 5 When the transmission mechanism 2 makes a linear downward movement along the axis of the support column 32, when the isolating moving contact 11 only cooperates with the second isolating stationary contact 13, the grounding moving contact 14 extends into the cooperation gap to realize the closing of the grounding contact structure. However, the positional relationship between the isolating contact structure and the grounding contact structure is not limited to this.

[0038] In this embodiment, a complex interlocking structure is not required between the isolation contact structure and the grounding contact structure. The isolation moving contact 11 and the grounding moving contact 14 are directly connected together, which solves the problem of product performance being affected by poor coordination of the interlocking structure. In particular, the conductive arm integrates the isolation moving contact 11 and the grounding moving contact 14, which helps to ensure the consistency of the operation of the isolation contact structure and the grounding contact structure. No wiring terminals are provided, and only one insulator 18 is provided in each phase main circuit, which moves linearly with the connecting base 19 and does not participate in rotation, avoiding the influence of torque or bending moment, which helps to reduce the overall size and reduce costs.

[0039] Furthermore, such as Figure 6 , 7 As shown, a first arc contact 16 is provided on the first isolating stationary contact 12, and a second arc contact 17 is provided on the second isolating stationary contact 13. The first arc contact 16 and the second arc contact 17 are respectively located at the lower part of the first isolating stationary contact 12 and the second isolating stationary contact 13, and extend towards one side of the isolating moving contact 11. The second arc contact 17 is always connected to the isolating moving contact 11, that is, the second arc contact 17 is always in contact with the long arm. The first arc contact 16 is connected to the isolating moving contact 11 when the isolating contact structure is closed. That is, when the long arm of the conductive arm passes through the through hole on the first isolating stationary contact 12 and the second isolating stationary contact 13 at the same time, the upper busbar and the lower busbar of the same phase are connected to form a circuit, and the first arc contact 16 is connected to the isolating moving contact 11. In this way, with the cooperation of the first arc contact 16, the second arc contact 17 and the isolating moving contact 11, the arc when the isolating contact structure is opened and closed can be extinguished.

[0040] like Figures 2-3 As shown, the transmission mechanism 2 is disposed between the support member 31 and the connecting base 19, and the transmission mechanism 2 includes a transmission assembly 22 (see...). Figure 8The transmission assembly 22 is connected to the drive link 41 of the operating mechanism 4 at one end and to the lead screw 21 at the other end. The lead screw 21 is arranged along the axial direction of the support column 32 and is rotatably engaged with the support structure 3. One end of the lead screw 21 is connected to the isolation mechanism 1. When the drive link 41 of the operating mechanism 4 rotates, the lead screw 21 causes the isolation mechanism 1 to perform linear reciprocating motion under the drive of the transmission assembly 22. Preferably, the lead screw 21 is connected to the support member 31 and the connecting base 19. The support structure 3 is provided with a first mounting hole for threaded connection with the lead screw 21. The first mounting hole can be aligned with the end of the support column 32, so that one end of the lead screw 21 is rotatably engaged with the support structure 3 and the other end of the lead screw 21 is connected to the connecting base 19. When the drive linkage 41 of the operating mechanism 4 rotates, the lead screw 21 drives the support member 311 to perform linear reciprocating motion under the drive of the transmission component 22. During this process, the lead screw 21 can also be rotated into the support column 32 through the first mounting hole to avoid occupying external space.

[0041] The transmission assembly 22 can be a sprocket transmission system or a gear transmission system. The transmission assembly 22 links the lead screw 21 to the drive linkage 41 of the operating mechanism 4. In the drive structure directly driven by the drive linkage 41, the drive linkage 41 only rotates within the range of 90 to 180°, which causes severe local wear of the drive linkage 41. In this embodiment, the transmission assembly 22 converts the rotation of the drive linkage 41 into multiple circumferential rotations, avoiding severe local wear of the drive linkage 41 and improving the service life of the product.

[0042] like Figure 8 As shown, when the transmission assembly 22 is a sprocket drive system, the transmission assembly 22 includes a first sprocket 221, a second sprocket 222 and a transmission chain 223. The first sprocket 221 and the second sprocket 222 are rotatably mounted on the support structure 3. The transmission chain 223 is simultaneously sleeved on the first sprocket 221 and the second sprocket 222 to achieve linkage connection. The drive linkage 41 of the operating mechanism 4 is linked to the first sprocket 221, and the lead screw 21 is linked to the second sprocket 222.

[0043] When the transmission assembly 22 is a geared transmission system (not shown), the transmission assembly 22 includes a first gear, a second gear and a transmission belt. The first gear and the second gear are rotated and mounted on the support structure 3. The transmission belt is simultaneously mounted on the first gear and the second gear to achieve linkage. The drive linkage 41 of the operating mechanism 4 is linked to the first gear, and the lead screw 21 is linked to the second gear.

[0044] Preferably, the transmission mechanism 2 further includes a guide structure. The guide structure, in cooperation with the support structure 3, provides guidance for the isolation mechanism 1 during linear reciprocating motion. Specifically, the guide structure includes at least one guide post 23. In the figure, a guide post 23 is provided on both sides of the lead screw 21. The guide post 23 is located on one side of the lead screw 21, and one end of the guide post 23 is fixedly connected to the connecting base 19. The support structure 3 is provided with at least one second mounting hole for cooperating with the other end of the guide post 23. Preferably, the second mounting hole is a through hole. Under the drive of the operating mechanism 4, the lead screw 21 cooperates with the first mounting hole to make the connecting base 19 and the support member 31 move closer or further apart in a linear motion. The guide post 23 also slides with the second mounting hole to achieve the guiding function.

[0045] Furthermore, a balance spring 24 is sleeved on the outside of both the lead screw 21 and the guide post 23. The drive link 41 of the operating mechanism 4 causes the lead screw 21 to reciprocate linearly through the transmission assembly 22. When the isolation mechanism 1 and the support structure 3 gradually approach each other, the balance spring 24 is compressed. When the isolation mechanism 1 and the support structure 3 gradually move away from each other, the balance spring 24 releases its elastic force to balance the gravity of the isolation mechanism 1.

[0046] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A high-voltage disconnect switch, comprising a support structure (3) and an isolation mechanism (1), a transmission mechanism (2), and an operating mechanism (4) disposed on the support structure (3), characterized in that: The transmission mechanism (2) is linked to the isolation mechanism (1) and the operating mechanism (4) respectively; the isolation mechanism (1) includes a connecting base (19) and at least one phase main circuit that is controlled synchronously. Each phase main circuit includes an insulator (18), an isolation contact structure and a grounding contact structure. The insulator (18) is fixedly mounted on the connecting base (19). The isolation moving contact (11) of the isolation contact structure is connected to the grounding moving contact (14) of the grounding contact structure and is fixedly mounted on the insulator (18). The isolation contact structure includes an isolation moving contact (11) and a first isolation stationary contact (12) and a second isolation stationary contact (13) fixedly arranged at intervals. Each phase main circuit corresponds to a phase busbar. Each phase busbar includes an upper busbar and a lower busbar. The first isolation stationary contact (12) and the second isolation stationary contact (13) are formed from the ends of the upper busbar and the lower busbar, respectively. The grounding contact structure includes a grounding moving contact (14) and a grounding stationary contact (15). The grounding stationary contact (15) is fixed on the support structure (3). The grounding stationary contact (15), the second isolation stationary contact (13) and the first isolation stationary contact (12) are arranged at intervals from bottom to top. The support structure (3) includes a support member (31) and a support column (32). The support member (31) and the support column (32) are vertically fixed. The operating mechanism (4) and the support column (32) are located on one side of the support member (31). The isolation mechanism (1) and the transmission mechanism (2) are located on the other side of the support member (31). The operating mechanism (4) is installed on the support column (32). The transmission mechanism (2) includes a lead screw (21), which is connected to the support member (31) and the connecting base (19). The support structure (3) is provided with a first assembly hole that is threadedly connected to the lead screw (21). The first assembly hole corresponds to the end of the support column (32). When the lead screw (21) drives the support member (31) to perform linear reciprocating motion, it can rotate into the interior of the support column (32) through the first assembly hole. Driven by the operating mechanism (4), the transmission mechanism (2) drives the insulator (18), the isolating moving contact (11) and the grounding moving contact (14) to move back and forth in a straight line along the axial direction of the support column (32) to complete the opening and closing action. When the isolating contact structure is closed, the grounding contact structure is opened synchronously. When the isolating contact structure is opened, the grounding contact structure is closed synchronously.

2. A high-voltage disconnector according to claim 1, characterized in that: When the isolating moving contact (11) cooperates with the first isolating stationary contact (12) and the second isolating stationary contact (13) to close the isolating contact structure, the grounding moving contact (14) separates from the grounding stationary contact (15), and the grounding contact structure opens; when the isolating moving contact (11) cooperates only with the second isolating stationary contact (13) to open the isolating contact structure, the grounding moving contact (14) cooperates with the grounding stationary contact (15), and the grounding contact structure closes.

3. A high-voltage disconnector according to claim 1, characterized in that: A first arc contact (16) is provided on the first isolating stationary contact (12). The first arc contact (16) contacts the isolating moving contact (11) when the isolating contact structure is closed. A second arc contact (17) is provided on the second isolating stationary contact (13). The second arc contact (17) always keeps in contact with the isolating moving contact (11). The first arc contact (16) and the second arc contact (17) are located at the lower part of the first isolating stationary contact (12) and the second isolating stationary contact (13), respectively, and extend to one side of the isolating moving contact (11).

4. A high-voltage disconnecting switch according to claim 2, characterized in that: Each phase main circuit includes an insulator (18), a conductive arm, a first isolating stationary contact (12), a second isolating stationary contact (13), and a grounding stationary contact (15); the conductive arm is fixed on the insulator (18), and the conductive arm includes a long arm and a short arm. The long arm is coaxially arranged with the insulator (18) as an isolating moving contact (11), one end of the short arm is connected to the long arm, and the other end extends radially out of the insulator (18) along the long arm as a grounding moving contact (14). The first isolating stationary contact (12) and the second isolating stationary contact (13) are... One end of the first isolating stationary contact (12) and the second isolating stationary contact (13) are fixed and used to connect to the busbar respectively. The other end of the first isolating stationary contact (12) and the second isolating stationary contact (13) are provided with through holes for the long arm to slide through to achieve electrical connection. The grounding stationary contact (15), the second isolating stationary contact (13) and the first isolating stationary contact (12) are arranged in sequence at intervals. The long arm passes through the through hole on the second isolating stationary contact (13). The transmission mechanism (2) drives the conductive arm to move linearly back and forth between the first isolating stationary contact (12) and the grounding stationary contact (15) along the axial direction of the long arm.

5. A high-voltage disconnector according to claim 4, characterized in that: The grounding stationary contact (15) includes two parallel metal rods. One end of the two metal rods is connected and fixed to the support member (31), and the other end of the two metal rods forms a mating gap. The other end of the metal rods corresponds to the middle part of the insulator (18). When the transmission mechanism (2) moves linearly downward along the axial direction of the support column (32), when the isolating moving contact (11) only mates with the second isolating stationary contact (13), the grounding moving contact (14) extends into the mating gap to realize the closing of the grounding contact structure.

6. A high-voltage disconnector according to claim 1, characterized in that: The transmission mechanism (2) includes a transmission component (22) and a lead screw (21). One end of the transmission component (22) is linked to the drive link (41) of the operating mechanism (4), and the other end of the transmission component (22) is linked to the lead screw (21). The lead screw (21) is rotatably engaged with the support structure (3), and one end of the lead screw (21) is connected to the isolation mechanism (1). When the drive link (41) of the operating mechanism (4) rotates, the lead screw (21) causes the isolation mechanism (1) to perform linear reciprocating motion under the drive of the transmission component (22).

7. A high-voltage disconnector according to claim 6, characterized in that: The transmission assembly (22) includes two sprockets and a transmission chain (223) that is linked to the two sprockets. The two sprockets are respectively connected to the drive link (41) and the lead screw (21) of the operating mechanism (4); or, the transmission assembly (22) includes two gears and a transmission belt that is linked to the two gears. The two gears are respectively connected to the drive link (41) and the lead screw (21) of the operating mechanism (4).

8. A high-voltage disconnector according to claim 6, characterized in that: The transmission mechanism (2) further includes a guide structure, which includes at least one guide post (23). The guide post (23) is disposed on one side of the lead screw (21). One end of the guide post (23) is fixedly connected to the isolation mechanism (1), and the other end of the guide post (23) can slide through the second mounting hole disposed on the support structure (3). A balance spring (24) is sleeved on the outside of both the lead screw (21) and the guide post (23).

9. A high-voltage disconnecting switch according to claim 3 or 4, characterized in that: The isolation mechanism (1) includes a multi-phase main circuit, and the insulators (18) of the multi-phase main circuit are spaced apart.

10. A high-voltage disconnecting switch according to claim 9, characterized in that: The connecting base (19) of the isolation mechanism (1) is arranged parallel to and spaced apart from the support member (31).

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