High-voltage isolating switch

Abstract

The invention discloses a high-voltage isolation switch, and relates to the field of power devices. At present, when a traditional high-voltage isolating switch is frequently switched on and off, the surface of a contact is easily melted and rough, and reliability is reduced; the device comprises an insulating frame consisting of a bottom beam, a central insulator and an edge insulator, the static contact assembly is fixed at the top end of the edge insulator, the conductive bridge is connected above the central insulator through the torsion assembly and can deflect along with rotation of the central insulator, and the on-off driving structure is installed on one side of the bottom beam, drives the central insulator to rotate and drives the two ends of the conductive bridge to rotate and be clamped into the static contact assembly to form an access. The two grounding driving structures are symmetrically distributed on the two sides of the on-off driving structure and independently control on-off of the grounding assemblies on the bottom beam and the corresponding static contacts. A melting phenomenon occurring during power-on and power-off switching is partitioned from an actual power-on area, the use of high-frequency on-off control is met, meanwhile, the requirement for the on-off speed is avoided, and efficient and reliable on-off control is achieved.

Description

Technical Field

[0001] The invention relates to the field of power devices, and in particular to a high-voltage isolating switch. Background Art

[0002] As an irreplaceable power device for on-off control in high-voltage lines, high-voltage disconnectors can be controlled for on-off and grounding under the control of driving equipment. However, during the on-off process, the surfaces of the moving contacts and the static contacts of the current high-voltage disconnectors will become rough and uneven under the action of high voltage current. This is particularly evident in high-voltage disconnectors that are frequently on and off. A Chinese patent (publication number: CN118173412B) proposes a high-voltage disconnector, a high-voltage box and a high-voltage disconnector control method, which mentions: "In the existing high-voltage disconnector, when the contacts are opened, the contact is completely closed from the contact to the contact. During the initial separation period, the contact pressure and the number of contact points of the contacts gradually decrease, while the contact resistance increases. This causes the current density at the contact point to increase dramatically. The heat generated causes the metal at the contact point to melt, forming so-called metal liquid drops. Long-term use will lead to an uneven contact surface, and the contact area between the contacts will decrease, which will greatly reduce the ability of the current to pass through the contacts, causing contact wear or welding. When the contact surface is worn or has been used for too long, poor contact will result. Severe wear will also cause the static contact and the moving contact to have insufficient engagement distance, which may cause the high-voltage cabinet to malfunction or even be dangerous.

[0003] However, the patent solves the technical problem in the following way: "The moving contact is separated from the static contact in a straight line, and the contact surfaces of the moving contact and the static contact are separated at the same time, so that the contact pressure is reduced instantly, preventing the contact pressure and the number of contact points from gradually decreasing and causing the current density at the contact point to increase sharply, thereby avoiding uneven contact surfaces and thus avoiding contact welding."

[0004] In the above method, the sharp increase in current density is reduced by achieving an instantaneous reduction in contact pressure through rapid linear separation. However, in terms of the current transmission speed, the mechanical speed is extremely slow. This method is only used to reduce the residence time and thus reduce the time of the high resistance state, and reduce the action time of the current on the surface. It will still cause a certain degree of melting. For high-voltage disconnectors that are frequently used for current on-off control, the roughness will become higher and higher under the cumulative effect. For high-voltage disconnectors that are used frequently, this method does not effectively solve the problem, so that the safety of long-term use of such high-voltage disconnectors cannot be guaranteed. Summary of the invention

[0005] The purpose of the present invention is to propose a high-voltage isolating switch to solve the problem that the surface of a high-voltage isolating switch with frequent on-off control is easily partially melted and roughened in the energized on-off state, thus affecting the safety of power connection.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: a high-voltage disconnector, comprising an insulating frame consisting of a bottom beam, a central insulator and two edge insulators, and further comprising: Two stationary contact assemblies are fixedly mounted on the top of the edge insulator and are at the same height; The conductive bridge is arranged between the two stationary contact assemblies and is used for clamping the two ends of the conductive bridge into the two stationary contact assemblies during rotation to form a current path. The torsion assembly is installed on the top of the central insulator, and deflects with the rotation of the central insulator. The conductive bridge penetrates and rotates on the surface of the torsion assembly and is driven by it; On-off drive structure; two ground drive structures; The on-off drive structure and the two grounding drive structures are both installed on one side of the bottom beam, and the two grounding drive structures are symmetrically arranged on both sides of the on-off drive structure. The on-off drive structure is used to drive the central insulator to rotate; The grounding assembly is installed through the bottom beam, driven by the grounding driving structure and controls the on-off state of the grounding assembly and the corresponding static contact assembly; A locking assembly, installed on the on-off drive structure and the two grounding drive structures, for limiting the staggered operation of the on-off drive structure or the two grounding drive structures; When the torsion assembly rotates with the central insulator, the two ends of the conductive bridge are clamped into the corresponding static contact assembly, and when it is fully clamped, continuous pressure is applied to cause the conductive bridge to deflect and press the static contact assembly. When the conductive bridge deflects, the length of the two ends extends and contacts the static contact assembly.

[0007] As a further description of the above technical solution: the torsion assembly includes a first top seat fixedly connected to the top of the central insulator, a protective frame is rotatably penetrated through the surface of the first top seat, a reciprocating plate is fixedly connected to the top of the first top seat, one end of the reciprocating plate is movably connected to an elastic support member through a pin shaft, the other end of the elastic support member is movably connected to the inner wall of the protective frame through a pin shaft, a limiting through groove is penetrated through the surface of the reciprocating plate, a movable ball knot is slidably provided on the inner wall of the limiting through groove, and the conductive bridge penetrates and rotates on the protective frame.

[0008] As a further description of the above technical solution: the conductive bridge comprises a sleeve that penetrates and rotates on the guard frame, both ends of the sleeve are slidably provided with moving contacts that cooperate with the static contacts, and the opposite ends of the two moving contacts are slidably provided with conductive cores for maintaining electrical connection with each other, the surface of the sleeve is provided with a guide groove for limiting the sliding distance of the moving contact, and the surface of the sleeve is fixed with a support rod that penetrates and slides in the movable ball knot; The conductive bridge also includes a telescopic sleeve that fits and slides on the arc-shaped side wall of the sleeve, the telescopic sleeve is fixedly connected to the guard frame, and the surface of the telescopic sleeve is provided with an oblique guide groove for limiting the deflection angle of the moving contact; When the support rod deflects with the sleeve under the action of the torsion assembly, the sleeve deflects with the moving contact through the guide groove, and the moving contact slides out under the restriction of the inclined guide groove during the deflection.

[0009] As a further description of the above technical solution: the moving contact includes a conductive head sliding on one end of the sleeve, and the surface of the conductive head is provided with a plurality of nail heads that slide in cooperation with the inclined guide groove and the guide groove.

[0010] As a further description of the above technical solution: the static contact assembly includes a second top seat fixed at the top of the edge insulator, a contact frame is fixed on the second top seat, elastic contact plates for clamping the conductive bridge are symmetrically arranged on the upper and lower sides of the inner wall of the contact frame, a lap hole is opened on the inner wall of the contact frame, and a wiring ear is installed on the surface of the contact frame; A side frame is fixed on one side of the contact frame, and a crimping plate is fixed on the surface of the side frame.

[0011] As a further description of the above technical solution: the on-off drive structure includes a mounting frame, a main driving rod is rotatably passed through the surface of the mounting frame, a torsion block is fixed to the top of the main driving rod, an arc plate is movably connected to the surface of the torsion block through a pin shaft, one end of the arc plate is movably connected to a deflection frame fixed to the bottom of the central insulator through a pin shaft, and the end of the deflection frame is movably connected to the first transmission rod through a pin shaft.

[0012] As a further description of the above technical solution: the grounding drive structure includes a secondary drive rod, a first deflection arm and a second deflection arm are installed on the top of the secondary drive rod, and the bottom ends of the first deflection arm and the second deflection arm are respectively movably connected with a transmission plate and a second transmission rod.

[0013] As a further description of the above technical solution: the grounding component includes a rotating column that passes through and rotates on the bottom beam, a slide plate and a grounding bridge are installed on the surface of the rotating column, a sliding rod is fixed to one side of the sliding rod, a sliding sleeve is slidably arranged on the surface of the sliding rod, two clamping plates installed with the transmission plate are symmetrically arranged on both sides of the sliding sleeve, and vertical sliding holes are opened on the surface of the clamping plate for limiting the sliding of the sliding sleeve.

[0014] As a further description of the above technical solution: two support blocks for supporting the grounding bridge are fixedly connected to the surface of the bottom beam.

[0015] As a further description of the above technical solution: the moving contact also includes a sliding surface, a clamping surface and a crimping surface at its power receiving end; The sliding surface is used for conducting with the inner wall of the stationary contact assembly before deflection, the clamping surface is used for conducting with the side clamping after deflection of the inner wall of the stationary contact assembly, and the crimping surface is used for adhering and locking to the inner wall of the stationary contact assembly after deflection and ejection.

[0016] As a further description of the above technical solution: the locking assembly includes a locking plate that penetrates and rotates on the surfaces of the main drive rod and the secondary drive rod, and also includes a first concave disk and a second concave disk, the first concave disk and the second concave disk are respectively fixed on the surfaces of the main drive rod and the secondary drive rod, and the lower surface of the locking plate is fixed with a first locking pin for cooperating with the first concave disk to limit the position, and second locking pins fixed on the surface of the pin plate are symmetrically arranged on both sides of the first locking pin.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: This solution rotates the central insulator through the on-off drive structure, and the central insulator deflects the two conductive bridges through the torsion assembly. When the conductive bridge contacts the two static contact assemblies, it continues to rotate with the central insulator and the torsion assembly, so that the conductive bridge starts to spin and is tightly stuck in the static contact assembly. When the conductive bridge spins, the contact surface with the static contact assembly is switched, and the melting phenomenon that occurs during the on-off switching is partitioned from the actual power-connected area, which meets the use of high-frequency on-off control and has no requirements for the on-off speed. When the conductive bridge spins, its length can change, so when it is inserted into the static contact assembly, the length changes with the rotation, and the static contact assembly is locked, which can avoid slipping. In the above process, the power-on and power-off processes are coordinated by different surfaces of the conductive bridge end to perform power-on, power-off and transition respectively, which can meet the stable current conduction under harsh conditions and solve the contact loss and unstable conductivity problems commonly found in high-frequency on-off operations. The overall operation has no special requirements for the on-off speed and can flexibly adapt to different application scenarios to achieve efficient and reliable on-off control and meet the safety requirements under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0019] Figure 2 It is a front view schematic diagram of the present invention.

[0020] Figure 3It is a side view schematic diagram of the present invention.

[0021] Figure 4 It is a three-dimensional schematic diagram of the static contact assembly of the present invention.

[0022] Figure 5 It is a schematic diagram of the connection state of the torsion assembly and the conductive bridge of the present invention.

[0023] Figure 6 It is a three-dimensional cross-sectional schematic diagram of the torsion assembly of the present invention.

[0024] Figure 7 It is a three-dimensional schematic diagram of the conductive bridge of the present invention.

[0025] Figure 8 Schematic diagram of the explosion of the conductive bridge of the present invention.

[0026] Fig. 9 It is a three-dimensional schematic diagram of the moving contact of the present invention.

[0027] Fig.10 It is a three-dimensional schematic diagram of the on-off drive structure of the present invention.

[0028] Fig.11 It is a schematic diagram of the transmission state of the grounding drive structure and the grounding assembly of the present invention.

[0029] Fig.12 It is an exploded schematic diagram of the locking assembly of the present invention.

[0030] Legend: 10. Insulation frame; 11. Bottom beam; 12. Central insulator; 13. Edge insulator; 20. On / off drive structure; 21. Mounting frame; 22. Torsion block; 23. Arc plate; 24. Deflection frame; 25. First transmission rod; 26. Main drive rod; 30. Ground drive structure; 31. Secondary drive rod; 32. First deflection arm; 33. Transmission plate; 34. Second deflection arm; 35. Second transmission rod; 40. grounding assembly; 41. rotating column; 42. sliding plate; 43. grounding bridge; 44. sliding rod; 45. clamping plate; 46. vertical sliding hole; 47. sliding sleeve; 50. Locking assembly; 51. Locking plate; 52. First concave disc; 53. Second concave disc; 54. First locking pin; 55. Second locking pin; 60. Torsion assembly; 61. First top seat; 62. Reciprocating plate; 63. Active ball knot; 64. Position limiting slot; 65. Elastic support member; 66. Guard frame; 70, conductive bridge; 71, sleeve; 72, moving contact; 721, conductive head; 722, nail head; 723, sliding surface; 724, clamping surface; 725, crimping surface; 73, conductive core; 74, telescopic kit; 75, oblique guide groove; 76, guide groove; 77, support rod; 80. Stationary contact assembly; 81. Contact frame; 82. Second top seat; 83. Elastic contact plate; 84. Overlap hole; 85. Wiring ear; 86. Side frame; 87. Pressing plate; 90. Support block. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1 - Fig.12 As shown, the present invention provides: a high-voltage disconnector, including an insulating frame 10 composed of a bottom beam 11, a central insulator 12 and two edge insulators 13, and also includes: Two stationary contact assemblies 80 are fixedly mounted on the top of the edge insulator 13 and are at the same height; The conductive bridge 70 is disposed between the two stationary contact assemblies 80, and is used to engage the two stationary contact assemblies 80 at both ends during rotation and form a current path; The torsion assembly 60 is installed on the top of the central insulator 12. As the central insulator 12 rotates, it deflects accordingly, and the conductive bridge 70 penetrates and rotates on the surface of the torsion assembly 60 and is driven by it. The on-off driving structure 20 and the two grounding driving structures 30 are both installed on one side of the bottom beam 11, and the two grounding driving structures 30 are symmetrically arranged on both sides of the on-off driving structure 20. The on-off driving structure 20 is used to drive the central insulator 12 to rotate; The grounding assembly 40 is installed through the bottom beam 11, driven by the grounding driving structure 30 and controls the on / off state of the grounding assembly 40 and the corresponding static contact assembly 80; The locking assembly 50 is installed on the on-off driving structure 20 and the two grounding driving structures 30 to limit the on-off driving structure 20 or the two grounding driving structures 30 from staggered operation.

[0033] In the above structure, the contact and separation between the sliding surface 723 of the moving contact 72 at the end of the conductive bridge 70 and the static contact is achieved, so that the resistance increase and local melting are concentrated on the sliding surface 723, and the clamping surface 724 is prevented from being damaged, thereby ensuring the smoothness and conductive performance of the clamping surface 724. This solution makes the clamping surface 724 always stable during contact by transitioning from the sliding surface 723 to the clamping surface 724 during the deflection process, avoiding poor contact due to local melting, and at the same time further enhances the conductivity reliability by using the design of the crimping surface 725, providing multiple guarantees. Since the roughness of the sliding surface 723 has no direct relationship with the conductivity, it can allow fast on-off operations under any current state, significantly improving the durability and reliability of the system.

[0034] The on-off operation also concentrates the current on the sliding surface 723, greatly reducing the loss of the clamping surface 724, thereby extending the service life of the device. The clamping surface 724 is designed to be located on the side and rotated upward when connected to the power, which can avoid the accumulation of dirt, and the crimping surface 725 further enhances the contact conductivity by vertically fitting the inner wall of the static contact, so that the device can ensure reliable conduction in harsh environments.

[0035] When the torsion assembly 60 rotates with the central insulator 12, the two ends of the conductive bridge 70 are clamped into the corresponding static contact assembly 80, and when it is fully clamped, continuous pressure is applied to cause the conductive bridge 70 to deflect and press the static contact assembly 80. When the conductive bridge 70 deflects, the length of the two ends extends and reaches the static contact assembly 80.

[0036] Specifically, Figure 5 and Figure 6 As shown: the torsion assembly 60 includes a first top seat 61 fixedly connected to the top of the central insulator 12, a protective frame 66 is rotatably penetrated on the surface of the first top seat 61, a reciprocating plate 62 is fixedly connected to the top of the first top seat 61, one end of the reciprocating plate 62 is movably connected to an elastic support member 65 through a pin shaft, and the other end of the elastic support member 65 is movably connected to the inner wall of the protective frame 66 through a pin shaft, a limiting through groove 64 is penetrated on the surface of the reciprocating plate 62, and a movable ball knot 63 is slidably provided on the inner wall of the limiting through groove 64, and a conductive bridge 70 is penetrated and rotated on the protective frame 66.

[0037] By setting up the elastic support 65, when the first top seat 61 rotates with the reciprocating plate 62, the rotational force can drive the guard frame 66 to rotate at the same time, and when the guard frame 66 cannot rotate, the elastic support 65 can shrink its length to maintain the guard frame 66 without moving, so that the reciprocating plate 62 inside it can continue to rotate and cooperate.

[0038] Specifically, Figure 8 and Figure 7As shown: the conductive bridge 70 includes a sleeve 71 that penetrates and rotates on the guard frame 66, and moving contacts 72 that cooperate with the static contacts are slidably arranged at both ends of the sleeve 71. The opposite ends of the two moving contacts 72 are slidably arranged with conductive cores 73 for maintaining electrical connection with each other. The surface of the sleeve 71 is provided with a guide groove 76 for limiting the sliding distance of the moving contact 72, and the surface of the sleeve 71 is fixed with a support rod 77 that penetrates and slides in the movable ball knot 63.

[0039] The conductive bridge 70 further includes a telescopic sleeve 74 that fits and slides on the arc-shaped side wall of the sleeve 71 . The telescopic sleeve 74 is fixedly connected to the guard frame 66 . An oblique guide groove 75 for limiting the deflection angle of the movable contact 72 is provided on the surface of the telescopic sleeve 74 .

[0040] When the support rod 77 deflects with the sleeve 71 under the action of the torsion assembly 60, the sleeve 71 deflects with the moving contact 72 through the guide groove 76, and the moving contact 72 slides out under the limiting action of the inclined guide groove 75 during the deflection.

[0041] The sleeve 71 of the conductive bridge 70 can rotate, and rotate with the moving contacts 72 at both ends. At the same time, the internal conductive core 73 can cooperate with the sleeve 71 to conduct electricity after the moving contact 72 slides out a certain distance.

[0042] Specifically, Fig. 9 As shown, the moving contact 72 includes a conductive head 721 sliding on one end of the sleeve 71 , and a surface of the conductive head 721 is provided with a plurality of nail heads 722 sliding in cooperation with the oblique guide grooves 75 and the guide grooves 76 .

[0043] By providing the conductive head 721 , the nail head 722 on the surface of the conductive head 721 can slide in the inclined guide groove 75 and the guide groove 76 , so as to achieve the effect of limited sliding.

[0044] Specifically, Figure 4 As shown: the static contact assembly 80 includes a second top seat 82 fixed at the top of the edge insulator 13, a contact frame 81 is fixed on the second top seat 82, elastic contact plates 83 for clamping the conductive bridge 70 are symmetrically arranged on the upper and lower sides of the inner wall of the contact frame 81, a lap hole 84 is opened on the inner wall of the contact frame 81, and a wiring ear 85 is installed on the surface of the contact frame 81.

[0045] A side frame 86 is fixed to one side of the contact frame 81 , and a press-contact plate 87 is fixed to a surface of the side frame 86 .

[0046] By providing a wiring lug 85 mounted on the surface of the contact frame 81 , the cable can be installed to maintain power connectivity.

[0047] By providing the elastic touch plate 83, the elastic touch plate 83, as one of the conductors with elasticity, can play a clamping effect to avoid shaking caused by strong winds and the like.

[0048] Specifically, Fig.10 As shown: the on-off drive structure 20 includes a mounting frame 21, a main drive rod 26 is rotatably penetrated on the surface of the mounting frame 21, a torsion block 22 is fixed to the top of the main drive rod 26, an arc plate 23 is movably connected to the surface of the torsion block 22 through a pin shaft, one end of the arc plate 23 is movably connected to a deflection frame 24 fixed to the bottom of the central insulator 12 through a pin shaft, and the end of the deflection frame 24 is movably connected to a first transmission rod 25 through a pin shaft.

[0049] The active driving rod rotates with the torsion block 22, and moves one end of the arc plate 23 through the torsion block 22. The guard plate can rotate with the deflection frame 24. When the deflection frame 24 rotates to one side, the arc plate 23 can cooperate with the arc trajectory of the central insulator 12 to maintain the maximum action angle.

[0050] At the same time, the deflection frame 24 can drive multiple switches through the first transmission rod 25 to perform synchronous on-off control.

[0051] Specifically, Fig.11 As shown: the grounding drive structure 30 includes a secondary drive rod 31, a first deflection arm 32 and a second deflection arm 34 are installed on the top of the secondary drive rod 31, and the bottom ends of the first deflection arm 32 and the second deflection arm 34 are movably connected with a transmission plate 33 and a second transmission rod 35 respectively.

[0052] The grounding drive structure 30 can operate with the first deflection arm 32 and the transmission plate 33 through the secondary drive rod 31, and can operate with multiple switches simultaneously when the second deflection arm 34 and the second transmission rod 35 are deflected.

[0053] Specifically, Fig.11 As shown: the grounding component 40 includes a rotating column 41 that penetrates and rotates on the bottom beam 11, a slide plate 42 and a grounding bridge 43 are installed on the surface of the rotating column 41, a sliding rod 44 is fixed to one side of the sliding rod 42, a sliding sleeve 47 is slidably arranged on the surface of the sliding rod 44, two clamping plates 45 installed with the transmission plate 33 are symmetrically arranged on both sides of the sliding sleeve 47, and a vertical sliding hole 46 is opened on the surface of the clamping plate 45 for limiting the sliding of the sliding sleeve 47.

[0054] By setting the slide rod 44 and the slide sleeve 47, when the slide rod 44 slides in the slide sleeve 47, the slide sleeve 47 can slide axially on the surface of the slide rod 44, and the slide sleeve 47 can slide vertically in the vertical slide hole 46 between the two clamping plates 45, so that the axial and vertical forces can be offset by movement. At this time, the slide rod 44 is only subjected to the horizontal driving force, and the horizontal force of the slide rod 44 can lead the slide plate 42 to deflect, thereby realizing the rotation of the rotating column 41 and the grounding bridge 43.

[0055] Specifically, Figure 1As shown, two support blocks 90 for supporting the grounding bridge 43 are fixedly connected to the surface of the bottom beam 11 .

[0056] By providing the support block 90 , the support block 90 can support the ground bridge 43 and keep it stably placed, thereby preventing the ground bridge 43 from causing obstruction to other structures.

[0057] Specifically, Fig. 9 As shown: the moving contact 72 also includes a sliding surface 723, a clamping surface 724 and a crimping surface 725 at its power receiving end.

[0058] The sliding surface 723 is used for conducting the static contact assembly 80 before the inner wall is deflected, the clamping surface 724 is used for conducting the side clamping after the inner wall is deflected, and the crimping surface 725 is used for adhering to and locking the static contact assembly 80 after deflection and ejection.

[0059] The sliding surface 723, the clamping surface 724, and the crimping surface 725 are designed with clear division of labor, thereby solving the contact loss and unstable conduction problems commonly encountered in high-frequency switching operations.

[0060] Specifically, Fig.12 As shown: the locking assembly 50 includes a locking plate 51 that penetrates and rotates on the surfaces of the main driving rod 26 and the secondary driving rod 31, and also includes a first concave disk 52 and a second concave disk 53. The first concave disk 52 and the second concave disk 53 are respectively fixed on the surfaces of the main driving rod 26 and the secondary driving rod 31. The lower surface of the locking plate 51 is fixed with a first locking pin 54 for cooperating with the first concave disk 52 to limit the position, and the first locking pin 54 is symmetrically arranged on both sides of the second locking pin 55 that is fixed on the surface of the pin plate.

[0061] By setting the locking assembly 50, the main driving rod 26 and the secondary driving rod 31 can respectively rotate with the first concave disc 52 and the second concave disc 53. When the first concave disc 52 rotates, the first locking pin 54 matched therewith is in a sliding out state, and the second locking pin 55 is stuck in the second concave disc 53. When the second concave disc 53 rotates, the second locking pin 55 slides out and the first locking pin 54 is stuck in the first concave disc 52. When the conductive bridge 70 is connected, the grounding bridge 43 cannot be lifted. If the grounding bridge 43 is lifted, the conductive bridge 70 cannot be connected, thereby ensuring that the overall mode can be switched alternately and ensuring safety.

[0062] When the present solution is in use, the main driving rod 26 drives the torsion block 22 at the top to rotate on the surface of the mounting frame 21. One end of the torsion block 22 moves with one end of the arc plate 23 through the pin shaft, and the other end of the guard plate drives the deflection frame 24 to rotate. At this time, the central insulator 12 is driven to rotate. The central insulator 12 rotates with the reciprocating plate 62 through the first top seat 61 at the top, and the reciprocating plate 62 pushes the guard frame 66 to rotate through the elastic support 65. At this time, the guard frame 66 rotates with the conductive bridge 70. When the conductive bridge 70 is stuck in the static contact, the conductive bridge 70 cannot move, and the central insulator 12 continues to apply a rotational force, and presses the elastic support 65 to contract when rotating with the reciprocating plate 62. At this time, the reciprocating plate 62 moves through the movable ball knot 63 sliding therein, and slides through the movable ball knot 63 and the support rod 77 sliding therein. When the support rod 77 moves, its movable ball knot 63 is tilted at the same time according to the inclination angle of the support rod 77 and slides in the limiting groove 64 as the position of the support rod 77 changes. When the support rod 77 moves, it rotates synchronously with the sleeve 71, and the sleeve 71 deflects synchronously with the moving contact 72 through the guide groove 76 and the nail head 722 opened on the surface.

[0063] When the moving contact 72 deflects, the telescopic sleeve 74 fixed on one side of the guard frame 66 has an inclined guide groove 75 provided thereon to guide the axial sliding of the nail head 722 when it deflects, so that the moving contact 72 can slide out while deflecting.

[0064] The operating trajectory of the above-mentioned moving contact 72 moves between the two elastic contact plates 83 of the static contact. At this time, the two elastic contact plates 83 are in contact with the sliding surface 723, and after moving to a predetermined distance, the moving contact 72 starts to rotate, so that its clamping surface 724 is in contact with the two elastic contact plates 83 and squeezes the elastic contact plates 83 to deform. While rotating, the moving contact 72 extends out and is inserted into the overlapping hole 84 to achieve locking and power-on fitting.

[0065] The above process realizes power-on.

[0066] When the power is off, if grounding is required, the secondary driving rod 31 is driven to drive the first deflection arm 32 to move the transmission plate 33. The transmission plate 33 moves in an arc trajectory with the slide rod 44 through the surface clamp 45 and the sliding sleeve 47 sliding thereon. At this time, the slide plate 42 can be deflected. When the slide plate 42 is deflected, the grounding bridge 43 can be brought into contact with the crimping plate 87 by the rotating column 41 to form a grounding loop.

[0067] In summary, it can be seen that in this solution, the central insulator 12 is rotated by the on-off driving structure 20, wherein the central insulator 12 deflects the first top seat 61 and the reciprocating plate 62, and the reciprocating plate 62 rotates with the guard frame 66 through the elastic support force of the elastic support member 65. When the slide rotates, the conductive bridge 70 penetrating the surface deflects at the same time until the sliding surface 723 of the moving contact 72 on both sides of the conductive bridge 70 is inserted between the two elastic contact plates 83 of the static contact, and with the continuous rotation, the reciprocating plate 62 presses the elastic support member 65 to shrink, and rotates with the sleeve 71 through the support rod 77, and the moving contacts 72 at both ends of the sleeve 71 deflect at the same time and transition from the sliding surface 723 to the clamping surface 72 4, and the two elastic contact plates 83 are deformed by pressing the clamping surface 724 to maintain sufficient clamping force. This method makes the contact and separation between the sliding surface 723 and the static contact so that as the resistance of the contact surface decreases, the local melting is located on the sliding surface 723, making the sliding surface 723 rough, and the contact is energized through the clamping surface 724 during deflection. In this method, the roughness of the sliding surface 723 has no effect on the subsequent conduction, that is, the surface can be directly turned on and off under any current state. At the same time, the clamping surface 724 can be used as a smooth surface for contact conduction and has sufficient clamping force, which meets the use of high-frequency on-off control and has no requirements for on-off speed.

[0068] At the same time, the moving contact 72 is in a deflected state under the action of the guide groove 76 on the surface of the sleeve 71, and the nail head 722 on the surface slides out under the action of the inclined guide groove 75 of the telescopic sleeve 74. The nail head 722 on the surface of the moving contact 72 in the slid-out state slides in the guide groove 76. At this time, the moving contact 72 slides out synchronously during the deflection from the sliding surface 723 to the clamping surface 724, and after sliding out, the crimping surface 725 is stuck in and fits in the overlapping hole 84. The pressure of the crimping surface 725 on the inner wall of the overlapping hole 84 is provided by the driving pressure of the on-off driving structure 20, so that the moving contact 72 in the stuck-in state is locked in the static contact. When the on-off driving structure 20 is not in action, the moving contact 72 and the static contact cannot be separated, and the crimping surface 725 cooperates with the overlapping hole 84 to further cooperate with the clamping surface 724 to guide the current.

[0069] In the above scheme, the influence of the on-off process is concentrated on the sliding surface 723, and the transition from the sliding surface 723 to the clamping surface 724 is maintained in a clamped and fitted state, so that it always maintains a stable energized state, and the clamping surface 724 will not be locally melted. At the same time, the crimping surface 725 is extended through a part to fit the inner wall of the static contact, serving as another current diversion insurance behind the clamping surface 724. The clamping surface 724 is based on an arc-shaped side wall, which is very easy to be contaminated by dirt. After deflection, dirt is not easy to be contaminated, and through the vertical plane of the crimping surface 725, it has better cleanliness guarantee and can meet the stable current conduction under harsh conditions.

[0070] The design of the sliding surface 723, the clamping surface 724, and the crimping surface 725 with clear division of labor solves the common contact loss and unstable conductivity problems in high-frequency on-off operations. Finally, the solution has no special requirements for on-off speed, can flexibly adapt to different application scenarios, achieve efficient and reliable on-off control, and meet the safety requirements under complex working conditions.

[0071] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-voltage disconnector, comprising an insulating frame (10) consisting of a bottom beam (11), a central insulator (12) and two edge insulators (13), characterized in that: Also includes: Two stationary contact assemblies (80) are fixedly mounted on the top of the edge insulator (13) and are at the same height; A conductive bridge (70) is arranged between the two stationary contact assemblies (80) and is used to engage the two stationary contact assemblies (80) at both ends during rotation and form a current path; A torsion assembly (60) is mounted on the top of the central insulator (12) and deflects as the central insulator (12) rotates. The conductive bridge (70) penetrates and rotates on the surface of the torsion assembly (60) and is driven thereby; It also includes an on-off drive structure (20) mounted on the bottom beam (11) for driving the central insulator (12) to rotate, two grounding drive structures (30) symmetrically arranged on the bottom beam (11), and a locking assembly (50) for limiting the interlaced operation of the on-off drive structure (20) and the two grounding drive structures (30); A grounding assembly (40) is installed through the bottom beam (11), is driven by the grounding drive structure (30) and controls the on / off state of the grounding assembly and the corresponding static contact assembly (80); The torsion assembly (60) rotates with the central insulator (12) to clamp the two ends of the conductive bridge (70) into the corresponding static contact assembly (80), and continuously applies pressure when the conductive bridge (70) is fully clamped, causing the conductive bridge (70) to deflect and press the static contact assembly (80). When the conductive bridge (70) deflects, the length of the two ends extends and contacts the static contact assembly (80).

2. A high voltage disconnect switch according to claim 1, characterized in that: The torsion assembly (60) comprises a first top seat (61) fixedly connected to the top of the central insulator (12); a protective frame (66) is rotatably penetrated through the surface of the first top seat (61); a reciprocating plate (62) is fixedly connected to the top of the first top seat (61); one end of the reciprocating plate (62) is movably connected to an elastic support member (65) via a pin shaft; the other end of the elastic support member (65) is movably connected to the inner wall of the protective frame (66) via a pin shaft; a limiting through groove (64) is penetrated through the surface of the reciprocating plate (62); a movable ball knot (63) is slidably provided on the inner wall of the limiting through groove (64); and the conductive bridge (70) is penetrated and rotatably disposed on the protective frame (66).

3. A high voltage disconnector according to claim 2, characterized in that: The conductive bridge (70) comprises a sleeve (71) that penetrates and rotates on the protective frame (66), movable contacts (72) that cooperate with the static contacts are slidably provided at both ends of the sleeve (71), and conductive cores (73) for mutually maintaining electrical connection are slidably provided at opposite ends of the two movable contacts (72), a guide groove (76) for limiting the sliding distance of the movable contact (72) is provided on the surface of the sleeve (71), and a support rod (77) that penetrates and slides in the movable ball knot (63) is fixed on the surface of the sleeve (71); The conductive bridge (70) further comprises a telescopic sleeve (74) which is attached to and slides on the arc-shaped side wall of the sleeve (71); the telescopic sleeve (74) is fixedly connected to the protective frame (66); and a surface of the telescopic sleeve (74) is provided with an oblique guide groove (75) for limiting the deflection angle of the movable contact (72); When the support rod (77) deflects with the sleeve (71) under the action of the torsion assembly (60), the sleeve (71) deflects with the moving contact (72) through the guide groove (76), and the moving contact (72) slides out under the limiting action of the inclined guide groove (75) when deflecting.

4. A high voltage disconnector according to claim 3, characterized in that: The movable contact (72) comprises a conductive head (721) sliding on one end of the sleeve (71), and a surface of the conductive head (721) is provided with a plurality of nail heads (722) sliding in cooperation with the oblique guide groove (75) and the guide groove (76); The moving contact (72) further comprises a sliding surface (723), a clamping surface (724) and a crimping surface (725) at its power receiving end; The sliding surface (723) is used to slide with the inner wall of the stationary contact assembly (80), the clamping surface (724) is used to clamp the inner wall of the stationary contact assembly (80) with pressure, and the crimping surface (725) is used to fit and lock on the inner wall of the stationary contact assembly (80) after deflection and ejection.

5. A high voltage disconnector according to claim 4, characterized in that: The stationary contact assembly (80) comprises a second top seat (82) fixed at the top of the edge insulator (13), a contact frame (81) being fixed on the second top seat (82), elastic contact plates (83) for clamping the conductive bridge (70) being symmetrically arranged on the upper and lower sides of the inner wall of the contact frame (81), a lap hole (84) being opened on the inner wall of the contact frame (81), and a wiring ear (85) being installed on the surface of the contact frame (81); A side frame (86) is fixed to one side of the contact frame (81), and a crimping plate (87) is fixed to the surface of the side frame (86).

6. A high voltage disconnect switch according to claim 1, characterized in that: The on-off drive structure (20) comprises a mounting frame (21), a main drive rod (26) rotatably penetrates the surface of the mounting frame (21), a torsion block (22) is fixed to the top end of the main drive rod (26), an arc plate (23) is movably connected to the surface of the torsion block (22) via a pin, one end of the arc plate (23) is movably connected to a deflection frame (24) fixed to the bottom of the central insulator (12) via a pin, and an end of the deflection frame (24) is movably connected to a first transmission rod (25) via a pin.

7. A high voltage disconnector according to claim 6, characterized in that: The grounding drive structure (30) comprises a secondary drive rod (31), a first deflection arm (32) and a second deflection arm (34) being mounted on the top of the secondary drive rod (31), and a transmission plate (33) and a second transmission rod (35) being movably connected to the bottom ends of the first deflection arm (32) and the second deflection arm (34), respectively.

8. A high voltage disconnector according to claim 7, characterized in that: The grounding assembly (40) comprises a rotating column (41) penetrating and rotating on the bottom beam (11), a slide plate (42) and a grounding bridge (43) being mounted on the surface of the rotating column (41), a slide rod (44) being fixed on one side of the slide rod (42), a sliding sleeve (47) being slidably arranged on the surface of the sliding rod (44), two clamping plates (45) mounted on the transmission plate (33) being symmetrically arranged on both sides of the sliding sleeve (47), and a vertical sliding hole (46) being provided on the surface of the clamping plate (45) for limiting the sliding of the sliding sleeve (47).

9. A high voltage disconnect switch according to claim 8, characterized in that: Two support blocks (90) for supporting the grounding bridge (43) are fixedly connected to the surface of the bottom beam (11).

10. A high voltage disconnector according to claim 4, characterized in that: The locking assembly (50) comprises a locking plate (51) which penetrates and rotates on the surfaces of the main driving rod (26) and the secondary driving rod (31), and also comprises a first concave disc (52) and a second concave disc (53), wherein the first concave disc (52) and the second concave disc (53) are respectively fixed on the surfaces of the main driving rod (26) and the secondary driving rod (31), and a first locking pin (54) for cooperating with the first concave disc (52) for limiting the position is fixed on the lower surface of the locking plate (51), and second locking pins (55) fixed on the surface of the pin plate are symmetrically arranged on both sides of the first locking pin (54).

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