An ac disconnector

Abstract

The application relates to an AC disconnecting switch, in particular to the field of power equipment, which comprises a chassis, the chassis is provided with first and second support insulators, and static and dynamic side terminal boards are respectively arranged, the static side terminal board is provided with a conductive knife switch, the application further comprises a contact-free opening device, which comprises a clamping column connected with the conductive knife switch and provided with a first permanent magnet, a fixing sleeve sleeved on the dynamic side terminal board, a second permanent magnet repelling the first permanent magnet, a knife collecting column connected with the static side terminal board and the like, and a plurality of auxiliary structures such as a rotating sleeve, a positioning structure, a clamping structure, a buffering structure, a knife clamping structure, a locking structure and the like are arranged. The application achieves the technical effects that the contact-free opening of the AC disconnecting switch is realized, the operation safety and stability are improved, the conductive knife switch can be effectively stored, and the opening state of the conductive knife switch is stable and reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, in particular to an alternating current disconnecting switch. BACKGROUND

[0002] In the power system, the alternating current disconnecting switch is a very important electrical equipment, which plays a role of isolating power supply, switching operation and pulling and closing the no-current or small-current circuit in the circuit. With the continuous development of the power industry, the performance and reliability of the alternating current disconnecting switch are required more and more. Reliable alternating current disconnecting switch can guarantee the stable operation of the power system, reduce the occurrence of power failure and reduce the economic loss caused by power failure. Its application scenarios are widely used, whether it is the power supply system of the city's substation, the factory or the rural power grid facilities, etc., which cannot be supported by the alternating current disconnecting switch.

[0003] In the related art, when the circuit breaker is closed, there will be electric charge in the alternating current disconnecting switch, and the staff has safety hazards when opening the gate, and manual operation needs staff to use special tools to directly operate the operating mechanism of the switch to separate or close the conductive knife switch, which is easy to reduce the work efficiency of the staff. SUMMARY

[0004] In order to improve the safety when opening the gate and increase the opening efficiency of the staff, the present application provides an alternating current disconnecting switch.

[0005] An alternating current disconnecting switch, comprising a chassis, the chassis is provided with a first support insulator and a second support insulator, a static side terminal block is arranged on the first support insulator, a dynamic side terminal block is arranged on the second support insulator, the static side terminal block is provided with a conductive knife switch, and the alternating current disconnecting switch further comprises a contactless gate opening device, which comprises:

[0006] A clamping column connected with the conductive knife switch, a clamping block connected with the clamping column, and a first permanent magnet connected with the end of the clamping column;

[0007] A fixed sleeve sleeved on the dynamic side terminal block, a fixed column connected with the side wall of the fixed sleeve, an insertion slot formed in the fixed column, and a clamping block connected with the inner wall of the insertion slot through clamping;

[0008] A second permanent magnet repelling the first permanent magnet, the second permanent magnet is installed at the bottom of the insertion slot, and a through hole communicating with the outside is formed in the bottom of the insertion slot;

[0009] When the second permanent magnet slides towards the first permanent magnet, the conductive knife switch is opened;

[0010] A knife collecting column connected with the static side terminal block, a strip-shaped slot arranged on the knife collecting column, the conductive knife switch inserted into the strip-shaped slot after opening the gate, and the conductive knife switch clamped with the inner wall of the strip-shaped slot.

[0011] By adopting the technical scheme, the contactless opening of the electric knife switch is realized by the magnetic force driving of the contactless opening device, and the loss and danger caused by physical contact are avoided; the clamping column and the fixed column are connected through the clamping block buckle, and the first permanent magnet and the second permanent magnet repel each other, so that the connection stability is increased; the strip-shaped slot of the knife collecting column can accommodate the electric knife switch after opening and is clamped with the inner wall, so that the position stability of the electric knife switch is ensured.

[0012] Optionally, the fixed sleeve is rotationally connected with the rotating sleeve, a third permanent magnet is inserted in the rotating sleeve, the third permanent magnet repels the second permanent magnet, and the third permanent magnet is magnetically connected with the electric knife switch; the fixed sleeve is provided with a locking piece penetrating through the rotating sleeve; when the rotating sleeve rotates to a position corresponding to the fixed column, the third permanent magnet is disconnected from the electric knife switch in magnetic connection, and the third permanent magnet drives the second permanent magnet to slide.

[0013] By adopting the technical scheme, the fixed sleeve is rotationally connected with the rotating sleeve, a third permanent magnet is inserted in the rotating sleeve, the third permanent magnet repels the second permanent magnet and is magnetically connected with the electric knife switch, so that the stability of the electric knife switch closing can be increased when closing; the fixed sleeve is provided with a locking piece penetrating through the rotating sleeve, when the rotating sleeve rotates to a position corresponding to the fixed column, the third permanent magnet is disconnected from the electric knife switch in magnetic connection and drives the second permanent magnet to slide, so that the contactless opening operation of the electric knife switch can be realized.

[0014] Optionally, an annular rotating groove is formed in the fixed sleeve, an annular slope is connected to the inner wall of the rotating groove, and a positioning groove is formed in the annular slope; the rotating sleeve is connected with a sliding block, a first spring is arranged in the sliding block, and a positioning block is connected to the first spring; when the third permanent magnet is magnetically attracted to the electric knife switch, the sliding block abuts against the annular slope; when the third permanent magnet repels the second permanent magnet, the positioning block extends into the positioning groove.

[0015] By adopting the technical scheme, the fixed sleeve is rotationally connected with the rotating sleeve, a third permanent magnet is inserted in the rotating sleeve, the third permanent magnet repels the second permanent magnet and is magnetically connected with the electric knife switch, so that the stability of the electric knife switch closing can be increased when closing; the fixed sleeve is provided with a locking piece penetrating through the rotating sleeve, when the rotating sleeve rotates to a position corresponding to the fixed column, the third permanent magnet is disconnected from the electric knife switch in magnetic connection and drives the second permanent magnet to slide, so that the contactless opening operation of the electric knife switch can be realized.

[0016] Optionally, the clamping column is provided with a displacement slot, the clamping block is rotationally connected with the inner wall of the displacement slot, a second spring is connected in the displacement slot, the second spring is connected with the end of the clamping block, the insertion slot is provided with a clamping slot, and the clamping block extends into the clamping slot; the insertion slot is provided with a trigger slot in communication with the clamping slot, the second permanent magnet is connected with a trigger block, and the trigger block extends into the trigger slot; when the second permanent magnet slides, the trigger block pushes the clamping block to extend into the displacement slot.

[0017] By adopting the above technical scheme, the second spring in the displacement slot is connected with the clamping block, the clamping block extends out of the displacement slot and into the clamping slot of the insertion slot in a natural state, the clamping column and the fixed column are buckled and connected, and when the second permanent magnet slides, the trigger block connected with the second permanent magnet pushes the clamping block to extend into the displacement slot in the trigger slot, the clamping block is buckled and connected with the fixed column, and the conductive knife switch is opened, thereby ensuring the accurate execution of the opening action.

[0018] Optionally, the conductive knife switch is connected with a buffer block, the buffer block is connected with a third spring, and the third spring is connected with the clamping column; when the clamping column is buckled and connected with the fixed column, the third spring is deformed and stretched.

[0019] By adopting the above technical scheme, the buffer block and the third spring are arranged, the third spring is deformed and stretched when the switch is closed, the clamping column and the fixed column are stably buckled and connected, the third spring is deformed and contracted to generate an impact force to hit the buffer block when the clamping block is buckled and connected with the fixed column, the conductive knife switch is rotated towards the closing column to complete the opening action, and the buffer block can buffer the impact force.

[0020] Optionally, the inner wall of the strip-shaped slot is connected with two knife clamping plates, and the surfaces of the two knife clamping plates are connected with anti-skid surfaces; when the switch is opened, the anti-skid surfaces abut against the surface of the conductive knife switch.

[0021] By adopting the above technical scheme, the two knife clamping plates connected with the inner wall of the strip-shaped slot have anti-skid surfaces, and when the switch is opened, the anti-skid surfaces abut against the surface of the conductive knife switch, so that the stability of the conductive knife switch stored in the strip-shaped slot is enhanced.

[0022] Optionally, the inner wall of the strip-shaped slot is connected with a fourth spring, the fourth spring is connected with a contact, the contact penetrates through the knife clamping plate, and the surface of the conductive knife switch is provided with a clamping hole; when the switch is opened, the contact extends into the conductive knife switch.

[0023] By adopting the above technical scheme, the fourth spring connected with the inner wall of the strip-shaped slot can make the connected contact penetrate through the knife clamping plate and extend into the clamping hole in the surface of the conductive knife switch when the switch is opened, and the clamping stability of the conductive knife switch in the strip-shaped slot after the switch is opened is further enhanced.

[0024] Optionally, the collecting knife column is connected with an arc-shaped frame, and two locking blocks are rotationally connected in the arc-shaped frame; when the gate is opened, the two locking blocks are rotated to clamp the conductive knife switch; a safety wire for grounding is sleeved on the locking block.

[0025] By adopting the above technical scheme, the arc-shaped frame and the two rotationally connected locking blocks are arranged, the locking blocks can clamp the conductive knife switch when the gate is opened, and the stability of the conductive knife switch in storage is improved; the locking block is sleeved with the safety wire for grounding, residual electric charge at the conductive knife switch can be guided to the ground, and the operation safety of the worker is improved.

[0026] Optionally, a spring plate is slidingly connected in the arc-shaped frame, two ends of the spring plate extend into the two locking blocks and are connected with the locking blocks, and the spring plate abuts against the arc surface of the arc-shaped frame when the locking blocks abut against the conductive knife switch.

[0027] By adopting the above technical scheme, when the gate is opened, the conductive knife switch abuts against the spring plate to drive the two locking blocks to rotate to abut against the two sides of the conductive knife switch, and then clamp the conductive knife switch; if there is residual electric charge at the conductive knife switch, the residual electric charge can flow into the ground along the spring plate, the locking block and the safety wire sleeved on the locking block, the operation safety of the worker is improved, and when the locking blocks abut against the conductive knife switch, the spring plate abuts against the arc surface of the arc-shaped frame to ensure that the structure is more stable.

[0028] In summary, the present application has at least one of the following beneficial technical effects:

[0029] 1. The contactless gate opening device is used to drive the conductive knife switch to open by magnetic force without physical contact, so as to avoid electric arc when the gate is opened and improve the safety of the operator;

[0030] 2. When the gate is closed, the first permanent magnet repels the second permanent magnet to make the clamping block abut against the inner wall of the clamping groove, and the third permanent magnet magnetically attracts the conductive knife switch, thereby increasing the stability of the conductive knife switch when the gate is closed;

[0031] 3. When the gate is opened, if there is residual electric charge at the conductive knife switch, the residual electric charge can flow into the bottom surface along the spring plate, the locking block, the connecting sleeve and the safety wire, thereby further improving the operation safety of the worker. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic diagram of the overall structure of the present application;

[0033] Figure 2 is Figure 1 is a schematic diagram of the cross-sectional structure along the A-A plane in

[0034] Figure 3 is Figure 2 is a schematic diagram of the local enlarged structure at A in

[0035] Figure 4 is a schematic view of the overall structure of the application, mainly embodying the annular slope;

[0036] Figure 5 is a schematic view of the overall structure of the application, mainly embodying the annular slope; Figure 2 is a schematic view of the overall structure of the application, mainly embodying the annular slope;

[0037] Figure 6 is a schematic view of the overall structure of the application, mainly embodying the annular slope; Figure 2 is a schematic view of the overall structure of the application, mainly embodying the annular slope;

[0038] Figure 7 is a schematic view of the overall structure of the application, mainly embodying the annular slope; Figure 1 is a schematic view of the overall structure of the application, mainly embodying the annular slope;

[0039] Figure 8 is a schematic view of the overall structure of the application, mainly embodying the annular slope; Figure 1 is a schematic view of the overall structure of the application, mainly embodying the annular slope.

[0040] BRIEF DESCRIPTION OF DRAWINGS: 1, base frame; 2, first support insulator; 3, second support insulator; 4, static side terminal block; 5, dynamic side terminal block; 6, conductive knife switch; 7, closing card plate; 8, buffer block; 9, third spring; 10, clamping column; 11, first permanent magnet; 12, clamping block; 13, second spring; 14, fixed sleeve; 15, fixed column; 16, insertion slot; 17, clamping slot; 18, triggering slot; 19, mounting ring; 20, second permanent magnet; 21, triggering block; 22, rotating slot; 23, annular slope; 24, positioning slot; 25, rotating sleeve; 26, sliding block; 27, clamping slot; 28, first spring; 29, positioning block; 30, mounting sleeve; 31, third permanent magnet; 32, drive rod; 33, magnetic attraction block; 34, fourth permanent magnet; 35, magnetic attraction spring; 36, knife collecting column; 37, strip-shaped slot; 38, knife clamping plate; 39, fourth spring; 40, contact; 41, clamping hole; 42, arc-shaped frame; 43, locking block; 44, rotating shaft; 45, elastic sheet; 46, clamping convex; 47, groove; 48, connecting sleeve; 49, safety lead. DETAILED DESCRIPTION

[0041] The following will be described in detail below with reference to the accompanying drawings. Figure 1 - the accompanying drawings Figure 8 , the application will be further described in detail.

[0042] An AC disconnecting switch, with reference to Figure 1The system includes a base frame 1, on which a first post insulator 2 and a second post insulator 3 are fixedly connected. A stationary side terminal block 4 is fixedly connected to the first post insulator 2, and a moving side terminal block 5 is fixedly connected to the second post insulator 3. A conductive knife switch 6 is rotatably connected to the stationary side terminal block 4, and a closing plate 7 is fixedly connected to the moving side terminal block 5. After the conductive knife switch 6 rotates, it connects to the closing plate 7. In addition, the system also includes a contactless opening device, which is driven by magnetic force without physical contact to realize the contactless opening operation of the conductive knife switch 6.

[0043] refer to Figure 1 , Figure 2 The contactless gate opening device includes a buffer block 8 fixedly connected to the end of the conductive knife switch 6 away from the stationary side terminal block 4, and the buffer block 8 is made of silicone rubber composite material. A third spring 9 is fixedly connected to the side of the buffer block 8 away from the conductive knife switch 6, and a stainless steel snap-fit ​​post 10 is fixedly connected to the end of the third spring 9. The end of the snap-fit ​​post 10 is designed as a bullet, and a first permanent magnet 11 is fixedly connected to the end of the snap-fit ​​post 10. The first permanent magnet 11 is made of neodymium iron boron permanent magnet material, and its surface is coated with an anti-rust agent.

[0044] refer to Figure 3 The side wall of the snap-fit ​​post 10 is provided with a clearance groove. The inner wall of the clearance groove away from the third spring 9 is rotatably connected to the snap-fit ​​block 12. The snap-fit ​​block 12 is also made of stainless steel and its end is designed with rounded corners. The bottom of the snap-fit ​​groove 17 is fixedly connected to the second spring 13, and the end of the second spring 13 is fixedly connected to the snap-fit ​​plate. When the second spring 13 is in its natural state, the snap-fit ​​block 12 extends out of the clearance groove.

[0045] refer to Figure 1 , Figure 2 , Figure 3 The moving side terminal block 5 is fitted with a ceramic fixing sleeve 14, and the fixing sleeve 14 is located above the moving side terminal block 5. The outer side wall of the fixing sleeve 14 away from the moving side terminal block 5 has an integrally formed fixing post 15. The fixing post 15 has an insertion groove 16, and the opening of the insertion groove 16 faces away from the moving side terminal block 5. The inner wall of the insertion groove 16 has a snap-fit ​​groove 17 and a trigger groove 18, and the trigger groove 18 is located on the side of the snap-fit ​​groove 17 closer to the moving side terminal block 5.

[0046] The bottom of the insertion slot 16 has a notch, through which the snap-fit ​​slot 17, the trigger slot 18, and the notch are connected. A mounting ring 19 is fixedly connected to the surface of the fixing post 15 at the notch, and the inner ring of the mounting ring forms a through hole. A second permanent magnet 20 is placed on the mounting ring 19. The second permanent magnet 20 is made of neodymium iron boron permanent magnet material and is coated with an anti-rust agent. A trigger block 21 is fixedly connected to the second permanent magnet 20, extending into the trigger slot 18. The second permanent magnet 20 can slide away from the mounting ring 19 within the insertion slot 16, and the trigger block 21 can slide away from the mounting ring 19 within the trigger slot 18.

[0047] refer to Figure 4 , Figure 5 An annular rotating groove 22 is formed on the surface of the fixed sleeve 14 between the fixed post 15 and the moving side terminal plate 5. An annular slope 23 is integrally formed on the inner wall of the rotating groove 22 near the moving side terminal plate 5. The annular slope 23 extends obliquely away from the moving side terminal plate 5 and along the direction of the rotating groove 22, thereby connecting the initial end and the end end of the annular slope 23. Additionally, a positioning groove 24 is formed on the annular slope 23.

[0048] refer to Figure 1 , Figure 6 A rotating sleeve 25 is fitted onto the surface of the fixed sleeve 14. The rotating sleeve 25 is made of silicone rubber composite material. A sliding block 26 is integrally formed on the inner wall of the rotating sleeve 25, extending into the rotating groove 22. The sliding block 26 slides along the surface of the annular slope 23. A slot 27 is formed in the sliding block 26. A first spring 28 is fixedly connected to the bottom of the slot 27. A positioning block 29 is fixedly connected to the end of the first spring 28. The positioning block 29 is made of stainless steel.

[0049] refer to Figure 1 , Figure 2 The outer surface of the rotating sleeve 25 is integrally formed with an installation sleeve 30. A third permanent magnet 31 is inserted into the installation sleeve 30. The third permanent magnet 31 is made of neodymium iron boron permanent magnet material and is sealed and fixed to the installation sleeve 30 with epoxy resin.

[0050] A drive rod 32 is integrally formed on the surface of the rotating sleeve 25 opposite to the mounting sleeve 30. When the circuit is open, the operator can hold the mounting sleeve 30 to drive the rotating sleeve 25 to rotate. When the circuit is closed, the operator can hold the drive rod 32 to drive the rotating sleeve 25 to rotate. In addition, a magnetic block 33 is fixedly connected to the conductive knife switch 6. The magnetic block 33 has a magnetic groove. A fourth permanent magnet 34 is slidably connected in the magnetic groove. The fourth permanent magnet 34 is fixed to the bottom of the magnetic groove by a magnetic spring 35. When the circuit is closed, the fourth permanent magnet 34 and the third permanent magnet 31 attract each other, thereby magnetically fixing the conductive knife switch 6.

[0051] refer to Figure 1 , Figure 7A ceramic knife-retracting post 36 is fixedly connected to the stationary side terminal block 4. A strip groove 37 is formed on the side of the knife-retracting post 36 near the conductive knife switch 6. A clamping plate 38 is fixedly connected to both inner walls of the strip groove 37. The surfaces of the two clamping plates 38 on opposite sides are provided with anti-slip textures. The clamping plates 38 are inclined away from the conductive knife switch 6 and the inner wall of the strip groove 37, so that the two clamping plates 38 cooperate to form an "eight" shaped clamping component.

[0052] refer to Figure 1 , Figure 7 , Figure 8 Multiple fourth springs 39 are fixedly connected to the inner wall of the strip groove 37. The ends of the fourth springs 39 are fixedly connected to stainless steel contacts 40. Meanwhile, the clamping plate 38 has multiple through holes corresponding to the positions of the contacts 40. The surface of the conductive knife switch 6 has multiple snap-fit ​​holes 41 corresponding to the positions of the contacts 40. When the switch is opened, the contacts 40 penetrate through the through holes and extend into the snap-fit ​​holes 41.

[0053] refer to Figure 1 , Figure 7 A stainless steel arc-shaped frame 42 is fixedly connected to the terminal block 4 away from the stationary side of the retracting column 36. The arc-shaped concave surface of the arc-shaped frame 42 matches the strip groove 37. Locking blocks 43 are installed on both sides of the arc-shaped frame 42. The locking blocks 43 are made of beryllium bronze plated with silver. A rotating shaft 44 is integrally formed on the locking block 43. The rotating shaft 44 is located at one-third of the locking block 43, and the locking block 43 is rotatably connected to the arc-shaped frame 42 through the rotating shaft 44. A beryllium bronze plated with silver is slidably connected to the arc-shaped frame 42. The surface of the spring 45 is plated with silver film. The two ends of the spring 45 are fixedly connected to the locking blocks 43 on both sides of the arc-shaped frame 42, and the end of the spring 45 is connected to the side of the locking block 43 away from the rotating shaft 44.

[0054] The locking block 43 is fixedly connected to a latching protrusion 46, and the arc-shaped frame 42 has a groove 47 on its side. When the locking block 43 rotates, the latching protrusion 46 and the groove 47 are locked together, and at this time, the spring piece 45 is deformed and elongated, and slides closer to the conductive knife switch 6 under the action of the locking block 43. The locking block 43 is fitted with a beryllium bronze silver-plated connecting sleeve 48. The end of the connecting sleeve 48 away from the locking block 43 is connected to a safety wire 49, and the safety wire 49 is connected to the external bottom surface or a stone utility pole.

[0055] The implementation principle of this application embodiment is as follows: When closing the circuit breaker, the conductive knife switch 6 is first connected to the closing plate 7, and the locking post 10 is pushed to cause the third spring 9 to deform and stretch, thereby extending the locking post 10 into the insertion slot 16. During this process, the locking block 12 abuts against the inner wall of the insertion slot 16, and the third spring 9 deforms and bends, so that part of it extends into the clearance slot until the locking block 12 slides to the locking slot 17, so that the locking block 12 extends into the locking slot 17 and is locked and fixed with the fixing post 15.

[0056] After the snap-fit ​​block 12 is installed in place, the first permanent magnet 11 and the second permanent magnet 20 repel each other magnetically, causing the snap-fit ​​block 12 to abut against the inner wall of the snap-fit ​​groove 17, thereby increasing the stability of the connection between the snap-fit ​​block 12 and the fixing post 15. Furthermore, during closing, the mounting sleeve 30 is positioned opposite the fixing post 15, causing the third permanent magnet 31 to magnetically attract the conductive switch 6, thereby increasing the stability of the conductive switch 6 during closing. Additionally, the conductive switch 6 is made of silver-plated aluminum alloy to reduce the overall weight of the conductive switch 6.

[0057] When the gate is opened, the operator can rotate the mounting sleeve 30 in one direction, so that the sliding block 26 on the rotating sleeve 25 slides along the surface of the annular slope 23. At the same time, the rotating sleeve 25 slides away from the moving side terminal plate 5 on the fixed sleeve 14, and drives the third permanent magnet 31 to slide closer to the second permanent magnet 20. At the same time, the third permanent magnet 31 disconnects the magnetic connection with the fourth permanent magnet 34.

[0058] When the positioning block 29 slides into the positioning groove 24, the first spring 28 deforms and elongates, causing the positioning block 29 to extend into the positioning groove 24. Additionally, the third permanent magnet 31 and the second permanent magnet 20 are magnetically repelled. If the magnetic strength of the third permanent magnet 31 is 1, then the magnetic strength of the second permanent magnet 20 is 0.5, and the magnetic strength of the first permanent magnet 11 is 0.3. Under the magnetic repulsion of the third permanent magnet 31, the second permanent magnet 20 resists the magnetic repulsion of the first permanent magnet 11 and slides along the insertion groove 16 towards the first permanent magnet 11. This causes the trigger block 21 to slide towards the locking block 12, thereby pushing the locking block 12 into the clearance groove and disengaging the locking block 12 from the fixing post 15.

[0059] At the instant the locking block 12 disengages from the fixing post 15, the third spring 9 deforms and contracts, causing the locking post 10 to move towards the buffer block 8. As the locking post 10 moves, it generates an impact force that strikes the buffer block 8, causing the conductive knife switch 6 to rotate towards the retracting post 36. Additionally, during this process, as the second permanent magnet 20 slides towards the first permanent magnet 11, the distance between them decreases, increasing the magnetic repulsion between them. This increases the sliding speed of the first permanent magnet 11, further enhancing the speed at which the locking post 10 moves.

[0060] The conductive switch 6 is inserted between the two clamping plates 38, and at this time, the contact 40 extends into the conductive switch 6. During this process, the conductive switch 6 abuts against the spring piece 45, causing the locking protrusion 46 to disengage from the groove 47, and resulting in the spring piece 45 deforming and bending. This causes the two locking blocks 43 to rotate, bringing them into contact with both sides of the conductive switch 6. If there is residual charge at the conductive switch 6, the residual charge flows into the bottom surface along the spring piece 45, locking blocks 43, connecting sleeve 48, and safety wire 49, thereby increasing the safety of the workers.

[0061] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An AC disconnect switch, comprising a base frame (1), wherein the base frame (1) is provided with a first post insulator (2) and a second post insulator (3), wherein a stationary side terminal block (4) is provided on the first post insulator (2), and a moving side terminal block (5) is provided on the second post insulator (3), wherein a conductive knife switch (6) is provided on the stationary side terminal block (4), characterized in that: It also includes a contactless gate opening device, which includes: A snap-fit ​​post (10) is connected to the conductive knife switch (6), and a snap-fit ​​block (12) is connected to the snap-fit ​​post (10). A first permanent magnet (11) is connected to the end of the snap-fit ​​post (10). A fixing sleeve (14) is fitted onto the moving side wiring plate (5). A fixing post (15) is connected to the side wall of the fixing sleeve (14). An insertion groove (16) is provided in the fixing post (15). The snap-fit ​​post (10) is snapped to the inner wall of the insertion groove (16) through a snap-fit ​​block (12). The second permanent magnet (20) repels the first permanent magnet (11). The second permanent magnet (20) is installed at the bottom of the insertion slot (16). The bottom of the insertion slot (16) has a through hole that communicates with the outside. When the second permanent magnet (20) slides closer to the first permanent magnet (11), the conductive knife switch (6) opens; The knife retractor (36) is connected to the stationary side wiring plate (4). The knife retractor (36) is provided with a strip groove (37). After the gate is opened, the conductive knife switch (6) extends into the strip groove (37) and the conductive knife switch (6) is engaged with the inner wall of the strip groove (37).

2. An AC disconnect switch according to claim 1, characterized in that: The fixed sleeve (14) is rotatably connected to the rotating sleeve (25), and a third permanent magnet (31) is inserted inside the rotating sleeve (25). The third permanent magnet (31) is repelled by the second permanent magnet (20), and the third permanent magnet (31) is magnetically connected to the conductive knife switch (6). The fixed sleeve (14) is provided with a locking element, which penetrates the rotating sleeve (25); When the rotating sleeve (25) rotates to the position corresponding to the fixed column (15), the third permanent magnet (31) disconnects from the conductive knife switch (6) and the third permanent magnet (31) drives the second permanent magnet (20) to slide.

3. An AC disconnect switch according to claim 2, characterized in that: The fixed sleeve (14) is provided with an annular rotating groove (22), the inner wall of the rotating groove (22) is connected with an annular slope (23), and the annular slope (23) is provided with a positioning groove (24); The rotating sleeve (25) is connected to a sliding block (26), and a first spring (28) is provided inside the sliding block (26). The first spring (28) is connected to a positioning block (29). When the third permanent magnet (31) is magnetically attracted to the conductive knife switch (6), the sliding block (26) abuts against the annular slope (23); when the third permanent magnet (31) and the second permanent magnet (20) repel each other, the positioning block (29) extends into the positioning groove (24).

4. An AC disconnect switch according to claim 1, characterized in that: The snap-fit ​​post (10) has a clearance groove, the snap-fit ​​block (12) is rotatably connected to the inner wall of the clearance groove, a second spring (13) is connected in the clearance groove, the second spring (13) is connected to the end of the snap-fit ​​block (12), the insertion groove (16) has a snap-fit ​​groove (17), and the snap-fit ​​block (12) extends into the snap-fit ​​groove (17); The insertion slot (16) has a trigger slot (18) that communicates with the snap-fit ​​slot (17). The second permanent magnet (20) is connected to a trigger block (21). The trigger block (21) extends into the trigger slot (18). After the second permanent magnet (20) slides, the trigger block (21) pushes the snap-fit ​​block (12) to extend into the clearance slot.

5. An AC disconnect switch according to claim 1, characterized in that: The conductive knife switch (6) is connected to a buffer block (8) at one end, and the buffer block (8) is connected to a third spring (9). The third spring (9) is connected to a snap-fit ​​post (10). When the snap-fit ​​post (10) is snapped into place with the fixed post (15), the third spring (9) is deformed and stretched.

6. An AC disconnect switch according to claim 1, characterized in that: The inner wall of the strip groove (37) is connected to two clamping blades (38), and the surfaces of the two clamping blades (38) are connected to anti-slip surfaces. When the gate is opened, the anti-slip surfaces abut against the surface of the conductive knife gate (6).

7. An AC disconnect switch according to claim 6, characterized in that: The inner wall of the strip groove (37) is connected to a fourth spring (39), the fourth spring (39) is connected to a contact (40), the contact (40) penetrates the clamping plate (38), and the conductive knife switch (6) has a snap-fit ​​hole (41) on its surface. When the switch is opened, the contact (40) extends into the conductive knife switch (6).

8. An AC disconnect switch according to claim 1, characterized in that: An arc-shaped frame (42) is connected to the knife-receiving column (36). Two locking blocks (43) are rotatably connected inside the arc-shaped frame (42). When the gate is opened, the two locking blocks (43) are rotated, and the two locking blocks (43) cooperate to clamp the conductive knife gate (6). The locking block (43) is fitted with a safety wire (49) for grounding.

9. An AC disconnect switch according to claim 8, characterized in that: A spring piece (45) is slidably connected inside the arc frame (42). The two ends of the spring piece (45) extend into the locking blocks (43) on both sides and are connected to the locking blocks (43). When the locking block (43) abuts against the conductive knife switch (6), the spring piece (45) abuts against the arc surface of the arc frame (42).

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