Alternating current isolating switch

Abstract

The invention relates to an alternating-current isolating switch, in particular to the field of power equipment, which comprises a bottom frame, a first post insulator, a second post insulator, a static side wiring board, a movable side wiring board and a non-contact switching-off device, and is characterized in that the first post insulator and the second post insulator are arranged on the bottom frame; the device comprises a clamping column which is connected with a conductive disconnecting link and is provided with a first permanent magnet, a fixing sleeve which is sleeved on a movable side wiring board, a second permanent magnet which repels the first permanent magnet, a disconnecting link collecting column which is connected with a static side wiring board, and various auxiliary structures such as a rotating sleeve, a positioning structure, a clamping structure, a buffering structure, a disconnecting link clamping structure, a locking structure and the like. The technical effects of realizing contact-free switching-off of the alternating-current isolating switch, improving the operation safety and stability, effectively accommodating the conductive disconnecting link and ensuring the stable and reliable switching-off state are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of power equipment, and in particular to an AC isolating switch. Background Art

[0002] AC disconnectors are crucial electrical devices in power systems, isolating power, switching circuits, and closing or opening circuits with no or low current. With the continuous development of the power industry, demands for the performance and reliability of AC disconnectors are becoming increasingly stringent. Reliable AC disconnectors ensure stable power system operation, reduce power outages, and mitigate economic losses caused by power failures. They are widely used in a wide range of scenarios, from urban substations and factory power supply systems to rural power grids.

[0003] In the related art, when the circuit breaker is closed, there will be electric charge in the AC isolating switch, which poses a safety hazard to the staff when opening the switch. In addition, manual operation requires the staff to use special tools to directly operate the operating mechanism of the switch to separate or close the conductive knife switch, which easily reduces the work efficiency of the staff. Summary of the Invention

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

[0005] An AC disconnect switch includes a base frame, the base frame is provided with a first support insulator and a second support insulator, the first support insulator is provided with a static side terminal block, the second support insulator is provided with a dynamic side terminal block, the static side terminal block is provided with a conductive knife switch, and also includes a contactless opening device, which includes: A clamping column is connected to the conductive knife switch, the clamping column is connected to a clamping block, and an end of the clamping column is connected to a first permanent magnet; A fixed sleeve is sleeved on the dynamic side terminal board, a side wall of the fixed sleeve is connected to a fixed column, an insertion slot is opened in the fixed column, and the clamping column is snap-connected to the inner wall of the insertion slot through a clamping block; The second permanent magnet repels the first permanent magnet, and the second permanent magnet is installed at the bottom of the insertion slot, and the bottom of the insertion slot is provided with a through hole communicating with the outside; When the second permanent magnet slides toward the first permanent magnet, the conductive knife switch opens; The knife-collecting column is connected to the static side terminal board. A strip groove is provided on the knife-collecting column. After the switch is opened, the conductive knife switch extends into the strip groove and is clamped with the inner wall of the strip groove.

[0006] By adopting the above technical solution, the magnetic drive of the contactless opening device is used to realize contactless opening of the conductive knife switch, avoiding the loss and danger caused by physical contact; the clamping column and the fixed column are connected by a clamping block, and the first permanent magnet and the second permanent magnet repel each other, thereby increasing the stability of the connection; the strip groove of the knife receiving column can accommodate the conductive knife switch after opening and clamp it with its inner wall to ensure the stable position of the conductive knife switch.

[0007] Optionally, the fixed sleeve is rotatably connected to 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 to the conductive knife switch; the fixed sleeve is provided with a locking piece, and the locking piece passes through the rotating sleeve; when the rotating sleeve rotates to a position corresponding to the fixed column, the third permanent magnet is magnetically disconnected from the conductive knife switch, and the third permanent magnet drives the second permanent magnet to slide.

[0008] By adopting the above technical solution, the fixed sleeve is rotatably connected to the rotating sleeve, and a third permanent magnet is inserted in the rotating sleeve. The third permanent magnet repels the second permanent magnet and is magnetically connected to the conductive knife switch, which can increase the closing stability of the conductive knife switch when closing. The fixed sleeve is provided with a locking piece that passes through the rotating sleeve. When the rotating sleeve rotates to a position corresponding to the fixed column, the third permanent magnet is magnetically disconnected from the conductive knife switch and drives the second permanent magnet to slide, thereby realizing a contactless opening operation of the conductive knife switch.

[0009] Optionally, an annular rotating groove is provided on the fixed sleeve, the inner wall of the rotating groove is connected to an annular slope, and the annular slope is provided with a positioning groove; the rotating sleeve is connected to a sliding block, a first spring is provided in the sliding block, and the first spring is connected to the positioning block; when the third permanent magnet and the conductive knife switch are magnetically attracted, the sliding block abuts against the annular slope; when the third permanent magnet and the second permanent magnet repel each other, the positioning block extends into the positioning groove.

[0010] By adopting the above technical solution, the fixed sleeve is rotated to connect to the rotating sleeve, the third permanent magnet inserted in the rotating sleeve repels the second permanent magnet and is magnetically connected to the conductive knife switch, and when the rotating sleeve rotates to a position corresponding to the fixed column, the third permanent magnet can drive the second permanent magnet to slide and disconnect the magnetic connection with the conductive knife switch; the fixed sleeve is provided with an annular rotating groove, and the annular slope on the inner wall of the rotating groove is provided with a positioning groove. The positioning block connected to the first spring in the sliding block of the rotating sleeve makes the sliding block abut against the annular slope when the third permanent magnet is magnetically attracted to the conductive knife switch, and extends into the positioning groove when the third permanent magnet repels the second permanent magnet, thereby ensuring the accurate position of the rotating sleeve during rotation and improving the stability and reliability of the gate opening operation.

[0011] Optionally, the clamping column is provided with a clearance groove, the clamping block is rotatably connected to the inner wall of the clearance groove, a second spring is connected in the clearance groove, the second spring is connected to the end of the clamping block, a clamping groove is provided in the insertion groove, and the clamping block extends into the clamping groove; the insertion groove is provided with a triggering groove connected to the clamping groove, the second permanent magnet is connected to the triggering block, the triggering block extends into the triggering groove, and after the second permanent magnet slides, the triggering block pushes the clamping block to extend into the clearance groove.

[0012] By adopting the above technical solution, the second spring in the give way groove is used to connect the clamping block, so that the clamping block extends out of the give way groove and extends into the clamping groove of the insertion groove in a natural state, thereby realizing the snap connection between the clamping column and the fixed column; when the second permanent magnet slides, the trigger block connected to it pushes the clamping block into the give way groove in the trigger groove, so that the clamping block and the fixed column are disengaged, thereby realizing the opening of the conductive knife switch, and ensuring the accurate execution of the opening action.

[0013] Optionally, a buffer block is connected to the end of the conductive knife switch, the buffer block is connected to a third spring, and the third spring is connected to the clamping column; when the clamping column is buckled and connected to the fixed column, the third spring is deformed and stretched.

[0014] By adopting the above technical solution, a buffer block and a third spring are provided. When the switch is closed, the third spring is deformed and stretched to ensure a stable snap connection between the clamping column and the fixed column. When the switch is opened, the clamping block and the fixed column are disengaged at the moment, and the third spring is deformed and contracted to generate an impact force to hit the buffer block, prompting the conductive knife switch to rotate toward the knife retracting column to complete the opening action. The buffer block can buffer the impact force.

[0015] Optionally, the inner wall of the strip groove is connected to two knife clamping plates, and the surfaces of the two knife clamping plates are connected to anti-slip surfaces, and the anti-slip surfaces abut against the surface of the conductive knife switch when the gate is opened.

[0016] By adopting the above technical solution, the two knife clamping plates with anti-slip surfaces connected to the inner wall of the strip groove can abut against the surface of the conductive knife switch when the gate is opened, thereby enhancing the stability of the conductive knife switch stored in the strip groove.

[0017] Optionally, the inner wall of the strip groove is connected to a fourth spring, the fourth spring is connected to a contact, the contact passes through the knife clamping plate, and a snap-in hole is opened on the surface of the conductive knife switch. When the switch is opened, the contact extends into the conductive knife switch.

[0018] By adopting the above technical solution, the fourth spring connected to the inner wall of the strip groove can use its elasticity to make the connected contact pass through the knife clamping plate and extend into the clamping hole on the surface of the conductive knife switch when the switch is opened, further enhancing the clamping stability of the conductive knife switch in the strip groove after the switch is opened.

[0019] Optionally, an arc frame is connected to the knife-retracting column, and two locking blocks are rotatably connected inside the arc frame. When the switch is opened, the two locking blocks are rotated, and the two locking blocks cooperate to clamp the conductive knife switch; a safety wire for grounding is provided on the locking block.

[0020] By adopting the above technical solution, an arc-shaped frame and two rotatably connected locking blocks are set up. When the switch is opened, the locking blocks can cooperate to clamp the conductive knife switch, thereby improving the stability of the conductive knife switch storage; the locking blocks are equipped with a grounded safety wire, which can conduct the residual charge at the conductive knife switch into the ground, thereby increasing the safety of the staff's operation.

[0021] Optionally, a spring piece is slidably connected in the arc frame, and both ends of the spring piece extend into the locking blocks on both sides and are connected to the locking blocks. When the locking blocks abut against the conductive knife switch, the spring piece abuts against the arc surface of the arc frame.

[0022] By adopting the above technical solution, when the switch is opened, the conductive knife switch contacts the spring piece, which can drive the two locking blocks to rotate so that they abut against the two sides of the conductive knife switch, thereby cooperating to clamp the conductive knife switch; and if there is residual charge at the conductive knife switch, the residual charge can flow into the ground along the spring piece, the locking block and the safety wire sleeved on the locking block, thereby increasing the safety of the staff's operation. At the same time, when the locking block abuts against the conductive knife switch, the spring piece abuts against the arc surface of the arc frame to ensure that the structural cooperation is more stable.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. The contactless opening device uses magnetic drive without physical contact to realize the opening operation of the conductive knife switch, avoiding arcing when opening the switch and improving the safety of the operator; 2. When closing the switch, the first permanent magnet and the second permanent magnet repel each other, causing the clamping block to come into contact with the inner wall of the clamping slot, and the third permanent magnet is magnetically attracted to the conductive knife switch, thereby increasing the stability of the conductive knife switch when closing; 3. When opening the switch, if there is residual charge at the conductive knife switch, the residual charge can flow into the bottom surface along the shrapnel, locking block, connecting sleeve, and safety wire, further increasing the operating safety of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of this application; Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along the AA plane; Figure 3 yes Figure 2 Schematic diagram of the local enlarged structure at A in the middle; Figure 4 It is a schematic diagram of the overall structure of this application, mainly showing the circular slope; Figure 5 yes Figure 2Schematic diagram of the local enlarged structure at B in the middle; Figure 6 yes Figure 2 Schematic diagram of the local enlarged structure at C in the middle; Figure 7 yes Figure 1 Schematic diagram of the local enlarged structure at D in the middle; Figure 8 yes Figure 1 Schematic diagram of the cross-sectional structure along the BB surface.

[0025] Description of the drawings: 1. chassis; 2. first post insulator; 3. second post 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. fixing sleeve; 15. fixing column; 16. insertion slot; 17. clamping slot; 18. trigger slot; 19. mounting ring; 20. second permanent magnet; 21. trigger block; 22. rotating slot; 23. annular slope; 24. fixed Positioning slot; 25. Rotating sleeve; 26. Sliding block; 27. Card slot; 28. First spring; 29. ​​Positioning block; 30. Mounting sleeve; 31. Third permanent magnet; 32. Driving rod; 33. Magnetic block; 34. Fourth permanent magnet; 35. Magnetic spring; 36. Knife collecting column; 37. Strip groove; 38. Knife clamping plate; 39. Fourth spring; 40. Contact; 41. Card hole; 42. Arc frame; 43. Locking block; 44. Rotating shaft; 45. Spring piece; 46. Card cam; 47. Groove; 48. Connecting sleeve; 49. Safety wire. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1 -Attached Figure 8 , further details of this application are given.

[0027] An AC isolating switch, reference Figure 1 , including a base frame 1, to which a first support insulator 2 and a second support insulator 3 are fixedly connected, a static side terminal block 4 is fixedly connected to the first support insulator 2, and a dynamic side terminal block 5 is fixedly connected to the second support insulator 3, wherein a conductive knife switch 6 is rotatably connected to the static side terminal block 4, and a closing card plate 7 is fixedly connected to the dynamic side terminal block 5, and the conductive knife switch 6 is connected to the closing card plate 7 after rotation. In addition, it also includes a contactless opening device, wherein the contactless opening device is driven by non-physical contact magnetic force, and is used to realize contactless opening operation of the conductive knife switch 6.

[0028] refer to Figure 1 、 Figure 2The contactless opening device includes a buffer block 8 fixedly connected to the end of the conductive knife switch 6 away from the static side terminal block 4, and the buffer block 8 is made of a 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 clamping column 10 is fixedly connected to the end of the third spring 9. The end of the clamping column 10 is designed as a bullet head, and a first permanent magnet 11 is fixedly connected to the end of the clamping column 10. The first permanent magnet 11 is made of neodymium iron boron permanent magnet material, and a rust inhibitor is sprayed on its surface.

[0029] refer to Figure 3 The sidewall of the clamping column 10 is provided with a clearance groove. A clamping block 12 is pivotally connected to the inner wall of the clearance groove, which is away from the third spring 9. The clamping block 12 is also made of stainless steel and has rounded corners. The bottom of the clamping groove 17 is fixedly connected to the second spring 13, and the end of the second spring 13 is fixedly connected to the clamping plate. When the second spring 13 is in its natural state, the clamping block 12 extends out of the clearance groove.

[0030] refer to Figure 1 、 Figure 2 、 Figure 3 The moving-side terminal block 5 is fitted with a porcelain fixing sleeve 14, which is positioned above the moving-side terminal block 5. A fixing post 15 is integrally formed on the outer wall of the fixing sleeve 14, on the side away from the moving-side terminal block 5. An insertion slot 16 is defined within the fixing post 15, with the opening of the insertion slot 16 facing away from the moving-side terminal block 5. A snap-fitting slot 17 and a triggering slot 18 are defined within the inner wall of the insertion slot 16, with the triggering slot 18 located on the side of the snap-fitting slot 17 closer to the moving-side terminal block 5.

[0031] The bottom of the insertion slot 16 is provided with a notch, wherein the engaging slot 17, the triggering slot 18, and the notch are connected. The surface of the fixing column 15 at the notch is fixedly connected to a mounting ring 19, and the installed inner ring encloses a through hole. The mounting ring 19 is provided with a second permanent magnet 20. The second permanent magnet 20 is made of neodymium iron boron permanent magnet material and is sprayed with a rust inhibitor on its surface. The second permanent magnet 20 is fixedly connected to a trigger block 21 that extends into the triggering slot 18. The second permanent magnet 20 can slide away from the mounting ring 19 in the insertion slot 16, and the trigger block 21 can slide away from the mounting ring 19 in the triggering slot 18.

[0032] refer to Figure 4 、 Figure 5 An annular rotation groove 22 is defined on the surface of the fixed sleeve 14 between the fixed post 15 and the movable-side terminal block 5. An annular slope 23 is integrally formed on the inner wall of the rotation groove 22 near the movable-side terminal block 5. The slope 23 extends obliquely away from the movable-side terminal block 5 and in the direction of the rotation groove 22, thereby connecting the initial and final ends of the slope 23. Furthermore, a positioning groove 24 is defined on the slope 23.

[0033] refer to Figure 1 、 Figure 6 The fixed sleeve 14 is covered with a rotating sleeve 25, which is made of a silicone rubber composite material. The inner wall of the rotating sleeve 25 is integrally formed with a sliding block 26 that extends into the rotating groove 22, and the sliding block 26 slides along the surface of the annular slope 23. The sliding block 26 has a slot 27 formed in it, and a first spring 28 is fixedly connected to the bottom of the slot 27. The end of the first spring 28 is fixedly connected to a positioning block 29, and the positioning block 29 is made of stainless steel.

[0034] refer to Figure 1 、 Figure 2 The outer surface of the rotating sleeve 25 is integrally formed with a mounting sleeve 30 , and a third permanent magnet 31 is inserted into the mounting sleeve 30 . The third permanent magnet 31 is made of neodymium iron boron permanent magnet material and is sealed and fixed to the mounting sleeve 30 by epoxy resin.

[0035] A driving rod 32 is integrally formed on the surface of the rotating sleeve 25 on the side opposite to the mounting sleeve 30. When opening the switch, the operator can hold the mounting sleeve 30 to drive the rotating sleeve 25 to rotate. When closing the switch, the operator can hold the driving 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, and a fourth permanent magnet 34 is slidably connected to the magnetic groove. The fourth permanent magnet 34 is fixed to the bottom of the magnetic groove by a magnetic spring 35. When closing the switch, the fourth permanent magnet 34 and the third permanent magnet 31 attract each other, thereby magnetically fixing the conductive knife switch 6.

[0036] refer to Figure 1 、 Figure 7 A porcelain knife-receiving post 36 is fixedly connected to the static-side terminal block 4. A strip groove 37 is formed on the side of the post 36 near the conductive knife switch 6. The two inner walls of the strip groove 37 are fixedly connected to knife clamping plates 38. The opposing surfaces of the two knife clamping plates 38 are provided with anti-slip grooves. The knife clamping plates 38 are arranged in an inclined direction away from the conductive knife switch 6 and the inner wall of the strip groove 37, so that the two knife clamping plates 38 cooperate to form an "eight"-shaped clamping member.

[0037] refer to Figure 1 、 Figure 7 、 Figure 8 A plurality of fourth springs 39 are fixedly connected to the inner wall of the strip groove 37, and a stainless steel contact 40 is fixedly connected to the end of the fourth spring 39. At the same time, the knife clamping plate 38 is provided with a plurality of through holes corresponding to the positions of the contacts 40, and a plurality of snap-fit ​​holes 41 corresponding to the positions of the contacts 40 are provided on the surface of the conductive knife switch 6. When the switch is opened, the contacts 40 pass through the through holes and extend into the snap-fit ​​holes 41.

[0038] refer to Figure 1 、 Figure 7The knife receiving column 36 is fixedly connected to a stainless steel curved frame 42 on the static side terminal block 4. The curved concave surface of the curved frame 42 matches the strip groove 37. Locking blocks 43 are installed on both sides of the curved frame 42. The locking blocks 43 are made of beryllium bronze with silver plating. 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 curved frame 42 via the rotating shaft 44. A spring 45 made of beryllium bronze with silver plating is slidably connected to the curved frame 42, and the surface of the spring 45 is coated with a silver film. The two ends of the spring 45 are fixedly connected to the locking blocks 43 on both sides of the curved 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.

[0039] The locking block 43 is fixedly connected to a latching protrusion 46, and a groove 47 is formed on the side of the arc-shaped frame 42. When the locking block 43 is rotated, the latching protrusion 46 and the groove 47 are locked together, and the spring 45 is deformed and elongated. Under the action of the locking block 43, it slides toward the conductive knife switch 6. The locking block 43 is equipped with a connecting sleeve 48 made of silver-plated beryllium bronze. The end of the connecting sleeve 48 away from the locking block 43 is connected to a safety wire 49, which is connected to the external bottom surface or a stone utility pole.

[0040] The implementation principle of the embodiment of the present application is: when closing the circuit, first connect the conductive knife switch 6 with the closing card plate 7, and push the clamping column 10 to make the third spring 9 deform and stretch, thereby extending the clamping column 10 into the insertion groove 16, and in this process, the clamping block 12 contacts the inner wall of the insertion groove 16, and the third spring 9 deforms and bends, so that part of it extends into the give way groove until the clamping block 12 slides to the clamping groove 17, so that the clamping block 12 extends into the clamping groove 17 and is fixed with the fixing column 15 by snapping.

[0041] After the clamping block 12 is in place, the first permanent magnet 11 and the second permanent magnet 20 magnetically repel each other, causing the clamping block 12 to contact the inner wall of the clamping groove 17, thereby increasing the stability of the connection between the clamping block 12 and the fixing post 15. Furthermore, when the switch is closed, the mounting sleeve 30 and the fixing post 15 are positioned relative to each other, causing magnetic attraction between the third permanent magnet 31 and the conductive knife switch 6, thereby increasing the stability of the conductive knife switch 6 when closed. Furthermore, the conductive knife switch 6 is made of a silver-plated aluminum alloy to reduce its overall weight.

[0042] When opening the gate, the staff 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 on the fixed sleeve 14 away from the moving side terminal block 5, and drives the third permanent magnet 31 so that the third permanent magnet 31 slides toward the second permanent magnet 20. At the same time, the third permanent magnet 31 is disconnected from the magnetic connection with the fourth permanent magnet 34.

[0043] When the positioning block 29 slides into the positioning slot 24, the first spring 28 deforms and elongates, causing the positioning block 29 to extend into the positioning slot 24. Furthermore, the third permanent magnet 31 and the second permanent magnet 20 magnetically repel each other. If the magnetic strength of the third permanent magnet 31 is 1, 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, the second permanent magnet 20 resists the magnetic repulsion of the first permanent magnet 11 under the action of the magnetic repulsion of the third permanent magnet 31 and slides along the insertion slot 16 toward the first permanent magnet 11, thereby driving the trigger block 21 to slide toward the clamping block 12, thereby pushing the clamping block 12 so that it extends into the clearance slot and disengages the clamping block 12 from the fixing column 15.

[0044] At the moment when the clamping block 12 is disengaged from the fixing column 15, the third spring 9 deforms and contracts, causing the clamping column 10 to move toward the buffer block 8. When the clamping column 10 moves, an impact force is generated and hits the buffer block 8, causing the conductive knife switch 6 to rotate toward the knife retracting column 36. In addition, during this process, when the second permanent magnet 20 slides toward the first permanent magnet 11, the distance between the first permanent magnet 11 and the second permanent magnet 20 becomes shorter, which increases the magnetic repulsion between the two, thereby increasing the sliding speed of the first permanent magnet 11, thereby further increasing the speed of the clamping column 10 when moving.

[0045] The conductive knife switch 6 is inserted between the two knife clamping plates 38, and the contact 40 extends into the conductive knife switch 6. During this process, the conductive knife switch 6 abuts against the spring 45, causing the protrusion 46 to disengage from the groove 47 and causing the spring 45 to deform and bend, thereby driving the two locking blocks 43 to rotate, causing the locking blocks 43 to abut against both sides of the conductive knife switch 6. If there is residual charge on the conductive knife switch 6, the residual charge flows along the spring 45, the locking block 43, the connecting sleeve 48, and the safety wire 49 into the bottom surface, thereby improving the safety of the operator.

[0046] The examples of this specific embodiment are all 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, any equivalent changes made based on the structure, shape, and principle of this application should be included in 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 support insulator (2) and a second support insulator (3), wherein a static side terminal block (4) is provided on the first support insulator (2), and a dynamic side terminal block (5) is provided on the second support insulator (3), and wherein the static side terminal block (4) is provided with a conductive knife switch (6), characterized in that: Also included is a contactless gate opening device, which includes: A clamping column (10) is connected to the conductive knife switch (6), the clamping column (10) is connected to a clamping block (12), and the end of the clamping column (10) is connected to a first permanent magnet (11); A fixed sleeve (14) is sleeved on the moving side terminal board (5); a side wall of the fixed sleeve (14) is connected to a fixed column (15); an insertion groove (16) is provided in the fixed column (15); and the clamping column (10) is clamped and connected to the inner wall of the insertion groove (16) through a clamping block (12); a second permanent magnet (20) that repels the first permanent magnet (11), the second permanent magnet (20) being mounted at the bottom of the insertion slot (16), the bottom of the insertion slot (16) being provided with a through hole communicating with the outside; When the second permanent magnet (20) slides toward the first permanent magnet (11), the conductive knife switch (6) opens; The knife-receiving column (36) is connected to the static side terminal board (4). A strip groove (37) is provided on the knife-receiving column (36). After the switch is opened, the conductive knife switch (6) extends into the strip groove (37), and the conductive knife switch (6) is clamped with the inner wall of the strip groove (37).

2. The AC isolating switch according to claim 1, characterized in that: The fixed sleeve (14) is rotatably connected to the rotating sleeve (25), a third permanent magnet (31) is inserted into the rotating sleeve (25), the third permanent magnet (31) and the second permanent magnet (20) repel each other, and the third permanent magnet (31) is magnetically connected to the conductive knife switch (6); The fixed sleeve (14) is provided with a locking piece, and the locking piece passes through the rotating sleeve (25); When the rotating sleeve (25) rotates to a position corresponding to the fixed column (15), the third permanent magnet (31) is magnetically disconnected from the conductive knife switch (6), and the third permanent magnet (31) drives the second permanent magnet (20) to slide.

3. The AC isolating switch according to claim 2, characterized in that: The fixing sleeve (14) is provided with an annular rotation groove (22), the inner wall of the rotation 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), a first spring (28) is provided in the sliding block (26), and the first spring (28) is connected to a positioning block (29); When the third permanent magnet (31) and the conductive knife switch (6) are magnetically attracted, 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. The AC isolating switch according to claim 1, characterized in that: The clamping column (10) is provided with a clearance groove, the clamping 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 clamping block (12), a clamping groove (17) is provided in the insertion groove (16), and the clamping block (12) extends into the clamping groove (17); The insertion slot (16) is provided with a trigger slot (18) connected to the clamping 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 clamping block (12) to extend into the clearance slot.

5. The AC isolating switch according to claim 1, characterized in that: The end of the conductive knife switch (6) is connected to a buffer block (8), the buffer block (8) is connected to a third spring (9), and the third spring (9) is connected to a clamping column (10); when the clamping column (10) is clamped and connected to the fixing column (15), the third spring (9) is deformed and stretched.

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

7. The AC isolating switch according to claim 6, characterized in that: The inner wall of the strip groove (37) is connected to a fourth spring (39), and the fourth spring (39) is connected to a contact (40). The contact (40) passes through the knife clamping plate (38). A clamping hole (41) is provided on the surface of the conductive knife switch (6). When the switch is opened, the contact (40) extends into the conductive knife switch (6).

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

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

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