CN213212024U

CN213212024U - Three-phase linkage isolating switch

Info

Publication number: CN213212024U
Application number: CN202021472814.2U
Authority: CN
Inventors: 王漳泉; 陈群; 郭文川; 郭晨; 洪伟聪; 郭子旭
Original assignee: Tampa Fujian Electric Co ltd
Current assignee: Tampa Fujian Electric Co ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-05-14
Anticipated expiration: 2030-07-23

Abstract

The utility model relates to a three-phase linkage isolating switch, including base, three movable contact seat, three stationary contact seat, three switch subassembly, three connecting rod device, a plurality of post insulators, transmission shaft device, auto-lock spring, operating handle, mousing-hook device and mechanical lock device, when not operating, mechanical lock work assembly imbeds the base, fixes the transmission shaft device circumferentially, locks the transmission shaft device like this, avoids the mistake to divide the floodgate or the mistake to close a floodgate; the disconnecting prevention device is installed on the disconnecting link assembly and is in transmission connection with the connecting rod device, the disconnecting prevention device is detachably embedded into the movable contact base under the traction of the connecting rod device, the disconnecting link assembly is locked when the disconnecting prevention device is embedded into the movable contact base, and even if the self-locking spring fails, the disconnecting link assembly can be reliably fixed, and the mistaken switching-off is avoided.

Description

Three-phase linkage isolating switch

Technical Field

The utility model relates to an isolator technical field especially relates to a three-phase linkage isolator.

Background

In the power transmission and transformation equipment of the power system, the three-phase linkage high-voltage isolating switch completes important tasks of synchronously switching a three-phase power line and ensuring the maintenance safety. In the three-phase linkage high-voltage isolating switch for vertically opening and closing the switch disconnecting link, a linkage driving mechanism of the three-phase disconnecting link comprises a transmission shaft device rotatably mounted on a base, three transmission connecting levers of the transmission shaft device are respectively connected with three insulation pull rods in the middle of the three-phase disconnecting link, and an isolating switch operating lever is used for rotating an operating handle to realize the operation and control of the transmission shaft device so as to perform switching and closing. In order to avoid the misoperation of the disconnecting link in an opening state, a self-locking spring device is arranged in the three-phase linkage high-voltage isolating switch, and the self-locking purpose is achieved by a self-locking spring between a transmission crank arm and a base which is additionally arranged on a transmission shaft device. The elastic force of the self-locking spring can be attenuated or fatigued to hardly achieve the purpose of reliable self-locking design, so that the mistaken opening and the mistaken closing are easily caused.

SUMMERY OF THE UTILITY MODEL

For the technical defect who overcomes prior art existence, the utility model provides a three-phase linkage isolator can reliably avoid mistake separating brake and mistake combined floodgate.

The utility model discloses a technical solution be: a three-phase linkage isolating switch comprises a base, three movable contact seats, three stationary contact seats, three disconnecting link assemblies, three connecting rod devices, a plurality of pillar insulators, a transmission shaft device, a self-locking spring, an operating handle, an unhooking prevention device and a mechanical lock device, wherein the operating handle is fixedly arranged at the tail end of the transmission shaft device, the three movable contact seats and the three stationary contact seats are arranged on the base through the pillar insulators, one end of each disconnecting link assembly is hinged on the corresponding stationary contact seat, the other end of each disconnecting link assembly is movably connected with the corresponding movable contact seat in a contact manner, the transmission shaft device is rotatably arranged on the base, three transmission crank arms are arranged at positions of the transmission shaft device corresponding to the disconnecting link assemblies, one end of each connecting rod device is hinged on the corresponding disconnecting link assembly, the other end of each connecting rod device is hinged on the corresponding transmission crank arm, and the, the mechanical lock device comprises a mechanical lock trigger assembly arranged on an operating handle and a mechanical lock working assembly sliding along the axial direction of a transmission shaft device, the mechanical lock trigger assembly is in transmission connection with the mechanical lock working assembly, the mechanical lock working assembly is circumferentially fixed with the transmission shaft device and is detachably embedded into the base, the unhooking prevention device is arranged on the disconnecting link assembly and is in transmission connection with the connecting rod device, and the unhooking prevention device is detachably embedded into the movable contact base under the traction of the connecting rod device.

As a further improvement of the utility model, mechanical lock working assembly includes that the mechanical lock resets and locks the bucket, the mechanical lock resets and installs between operating handle and locking bucket and the mechanical lock resets the both ends of piece and withstand operating handle and locking bucket respectively, the mechanical lock resets and acts on the direction and makes the locking bucket press to the base, the locking bucket is fixed along transmission shaft device axial direction slip and locking bucket and transmission shaft device circumference, the locking bucket can be dismantled with the base and be connected.

As a further improvement of the utility model, the operating handle is provided with an operating notch, the mechanical lock trigger component comprises an operating plate, a first guide ring, a second guide ring and a mechanical lock traction rope, the first guide ring and the second guide ring are fixedly arranged on one side of the operating handle close to the base, one end of the control plate is hinged on the control notch, the other end of the control plate is fixedly provided with a mechanical lock traction rope, the operating handle is provided with a limiting block which is arranged on one side of the operating plate close to the operating notch and supports against the operating plate, one end of the mechanical lock traction rope is fixedly arranged on the control plate, the other end of the mechanical lock traction rope is fixedly arranged on the mechanical lock working assembly, the mechanical lock traction rope sequentially passes through the first guide ring and the second guide ring, the direction of the mechanical lock traction rope between the first guide ring and the second guide ring is parallel to the operating handle, the direction of the mechanical lock pulling rope between the second guide ring and the mechanical lock component is parallel to the transmission shaft device.

As a further improvement, the transmission shaft device includes first pivot, second pivot and angle adjustment ring, the equal rotatable installation of first pivot and second pivot is on the base, operating handle adorns admittedly at first pivot end, be provided with three transmission turning arm in second pivot and the corresponding position of each switch subassembly, the integrative setting of auto-lock turning arm is in the second pivot, angle adjustment ring circumference fixed mounting just follows first pivot endwise slip in first pivot, angle adjustment ring detachable is fixed with second pivot circumference.

As a further improvement, the transmission shaft device further comprises a rotating shaft reset spring, an organic whole is provided with the step that resets in the first pivot, the step that resets is pushed down to pivot reset spring one end and the angle adjustment ring is pushed down to the other end, the angle adjustment ring is fixed with the equal circumference of first pivot and second pivot when the rotating shaft reset spring is in free state, the angle adjustment ring breaks away from the contact with the second pivot when the rotating shaft reset spring is in compression limit position.

As a further improvement, mousing-hook device installs on the switch subassembly, linkage is the slot hole with the hinge hole of switch subassembly, be equipped with the anticreep draw-in groove on the movable contact seat, the linkage upside is connected to mousing-hook device one end and other end detachable embedding mousing-hook groove, linkage slides and pulls mousing-hook device along the trend of slot hole, and this isolator still includes the anticreep elasticity piece that resets, mousing-hook device is connected to mousing-hook device one end and installs on the switch subassembly and the other end, mousing-hook device embedding mousing-hook groove is made to mousing-hook device effect direction that mousing-hook elasticity resets.

As the utility model discloses a further improvement, each the switch subassembly all includes two electrically conductive blade, articulated bolt, compresses tightly spring, gland nut and clamp bolt, two electrically conductive blade presss from both sides to be held and corresponds the stationary contact seat, two electrically conductive blade all articulate on the stationary contact seat through articulated bolt, the movable contact seat that two electrically conductive blade detachable centre gripping correspond, clamp bolt passes two electrically conductive blade in proper order and compresses tightly the spring, clamp bolt and gland nut threaded connection and two electrically conductive blade of centre gripping, clamp spring one end withstands the gland nut other end and withstands clamp bolt.

As a further improvement, the mousing-hook device includes mousing-hook haulage rope, fastening hook and guide post, the anticreep elasticity piece that resets is the elasticity torsion member, the guide post is adorned admittedly between two electrically conductive blades, linkage articulates between two electrically conductive blades, fastening hook one end articulates between two electrically conductive blades and other end an organic whole is equipped with can dismantle the hook of being connected with the anticreep draw-in groove, mousing-hook haulage rope one end is adorned admittedly on the linkage top and the other end is adorned admittedly on the fastening hook, the guide post is walked around to the mousing-hook haulage rope, the fastening hook is connected to elasticity torsion member one end and the electrically conductive blade is connected to the other end, the effect direction of elasticity torsion member makes hook embedding anticreep draw.

As a further improvement of the utility model, the position that the fastening hook adorns the unhook haulage rope admittedly pulls the position for the rope, the rope pulls the position to the distance between the articulated position of fastening hook and is less than the rope and pulls the distance between position to the hook.

As a further improvement, the elastic torsion member is a torsion spring, the fastening hook is connected to one end of the torsion spring and the conductive blade is connected to the other end of the torsion spring, and the action direction of the torsion spring enables the hook to be embedded into the anti-falling clamping groove.

The utility model has the advantages that:

1: the operating handle is fixedly arranged at the tail end of the transmission shaft device, the three movable contact seats and the three static contact seats are arranged on the base through post insulators, one end of each disconnecting link assembly is hinged to the corresponding static contact seat, the other end of each disconnecting link assembly is movably connected with the corresponding movable contact seat in a contact mode, the transmission shaft device is rotatably arranged on the base, three transmission connecting levers are arranged at positions, corresponding to the disconnecting link assemblies, of the transmission shaft device, one end of each connecting rod device is hinged to the corresponding disconnecting link assembly, the other end of each connecting rod device is hinged to the corresponding transmission connecting lever, a self-locking connecting lever is further arranged on the transmission shaft device, one end of each self-locking spring is hinged to the self-locking connecting lever, the other end of each self-locking spring is hinged to the base, the mechanical lock device comprises a mechanical lock triggering assembly arranged on the operating handle and a mechanical lock working assembly sliding along the axial direction of the transmission shaft device, the mechanical lock working assembly;

when the disconnecting switch is not operated, the mechanical lock working component is embedded into the base and is restrained by the base to be incapable of rotating, and because the mechanical lock working component is circumferentially fixed with the transmission shaft device, even when the self-locking spring is difficult to achieve reliable self-locking due to self attenuation or fatigue, the transmission shaft device is fixed by the mechanical lock working component, so that the disconnecting switch component cannot be accidentally switched off;

when the brake is required to be opened, an operator pulls the mechanical lock trigger assembly by using the isolating switch operating rod, the mechanical lock trigger assembly is in transmission connection with the mechanical lock working assembly, the mechanical lock working assembly is pulled to axially slide along the transmission shaft device, the mechanical lock working assembly is separated from the base, the transmission shaft device is released from circumferential fixation, and the isolating switch operating rod can rotate the operating handle to complete the brake opening;

after the brake is switched off, the operating rod of the isolating switch is separated from the mechanical lock trigger assembly, the mechanical lock working assembly is embedded into the base again, and the transmission shaft device is fixed in the circumferential direction, so that the transmission shaft device is locked again, and the mistaken switching-on is avoided.

2: the disconnecting prevention device is installed on the disconnecting link assembly and is in transmission connection with the connecting rod device, the disconnecting prevention device is detachably embedded into the movable contact base under the traction of the connecting rod device, the disconnecting link assembly is locked when the disconnecting prevention device is embedded into the movable contact base, and even if the self-locking spring fails, the disconnecting link assembly can be reliably fixed, and the mistaken switching-off is avoided.

Drawings

Fig. 1 is the schematic diagram of the three-phase linkage isolating switch of the utility model.

Fig. 2 is an enlarged schematic view of B in fig. 1.

Fig. 3 is a schematic view of the locking barrel of the present invention.

Fig. 4 is a mechanical lock trigger assembly.

Fig. 5 is an enlarged schematic view of C in fig. 4.

Fig. 6 is an enlarged schematic view of a point a in fig. 1.

Fig. 7 is a schematic cross-sectional view of the transmission shaft at the position of the angle adjustment ring.

Fig. 8 is a schematic structural view of a transmission shaft device.

Fig. 9 is a schematic structural view of the unhooking prevention device during closing.

Fig. 10 is a schematic structural view of the unhooking prevention device during opening.

Fig. 11 is an enlarged view of fig. 10 at D.

Fig. 12 is a schematic side view of the three-phase linkage isolating switch of the present invention.

Fig. 13 is a schematic structural view at E in fig. 12.

Fig. 14 is a schematic structural diagram of the three-phase linkage isolation switch (without the mechanical lock device) of the present invention.

Description of reference numerals: 1. a base; 11. a tooth limiting hole; 21. a movable contact base; 211. an anti-drop clamping groove; 22. a stationary contact base; 31. unhooking the hauling rope; 32. fastening hooks; 321. a hook; 33. an elastic torsion member; 34. a guide post; 4. a knife switch assembly; 41. a conductive blade; 42. a hinge bolt; 43. a compression spring; 44. a compression nut; 45. a hold-down bolt; 5. a link means; 6. a drive shaft arrangement; 61. a first rotating shaft; 611. locking the guide groove; 612. resetting the step; 62. a second rotating shaft; 621. a second shaft guide groove; 63. an angle adjusting ring; 632. a dust-proof and water-proof ring; 631. an angle ring guide projection; 64. a rotating shaft reset spring; 65. a limiting clamp spring; 66. a transmission crank arm; 67. a self-locking crank arm; 7. a self-locking spring; 8. an operating handle; 81. an operating notch; 82. a limiting block; 9. a mechanical lock device; 911. a mechanical lock reset; 912. locking the barrel; 9121. limiting teeth; 9122. a mechanical lock guide projection; 921. a control panel; 922. a first guide ring; 923. a second guide ring; 924. a mechanical lock pull rope.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1 to 14, the present embodiment provides a three-phase linkage isolating switch, which includes a base 1, three moving contact seats 21, three stationary contact seats 22, three disconnecting link assemblies 4, three link devices 5, a plurality of post insulators, a transmission shaft device 6, a self-locking spring 7, an operating handle 8, and a mechanical lock device 9.

In this embodiment, the operation handle 8 is fixedly installed at the end of the transmission shaft device 6, the three movable contact seats 21 and the three stationary contact seats 22 are installed on the base 1 through post insulators, one end of each knife switch assembly 4 is hinged on the corresponding stationary contact seat 22, and the other end is movably connected with the corresponding movable contact seat 21 in a contact manner, the transmission shaft device 6 is rotatably installed on the base 1, three transmission connecting levers 66 are arranged at positions of the transmission shaft device 6 corresponding to the knife switch assemblies 4, one end of each connecting rod device 5 is hinged on the corresponding knife switch assembly 4, and the other end is hinged on the corresponding transmission connecting lever 66, a self-locking connecting lever 67 is further arranged on the transmission shaft device 6, the transmission shaft device 6 is rotated by using the isolating switch operation rod to rotate the operation handle 8, the transmission shaft device 6 drives the three transmission connecting levers 66, so that the three connecting rod devices 5 pull the corresponding knife switch assemblies 4 to realize synchronous, one end of a self-locking spring 7 is hinged to the self-locking crank arm 67, the other end of the self-locking spring 7 is hinged to the base 1, the self-locking spring 7 locks the self-locking crank arm 67 through extrusion of the self-locking crank arm 67, the mechanical lock device 9 comprises a mechanical lock trigger assembly and a mechanical lock working assembly, the mechanical lock trigger assembly is mounted on the operating handle 8, the mechanical lock working assembly slides axially along the transmission shaft device 6, the mechanical lock trigger assembly is in transmission connection with the mechanical lock working assembly, the mechanical lock working assembly and the transmission shaft device 6 are circumferentially fixed, and the mechanical lock working assembly is detachably embedded into;

when the disconnecting switch is not operated, the mechanical lock working component is embedded into the base 1 and is restrained by the base 1 to be incapable of rotating, and because the mechanical lock working component is circumferentially fixed with the transmission shaft device 6, even when the self-locking spring 7 is difficult to achieve reliable self-locking due to self attenuation or fatigue, the transmission shaft device 6 is fixed by the mechanical lock working component, so that the disconnecting link component 4 cannot be accidentally disconnected;

when the brake is required to be opened, an operator pulls the mechanical lock trigger assembly by using the isolating switch operating rod, the mechanical lock trigger assembly is in transmission connection with the mechanical lock working assembly, the mechanical lock working assembly is pulled to axially slide along the transmission shaft device 6, and finally the mechanical lock working assembly is separated from the base 1, so that the transmission shaft device 6 is released from circumferential fixation, and the isolating switch operating rod can hook the operating handle 8 to rotate the operating handle 8 to complete the brake opening;

after the brake is switched off, the operating rod of the disconnecting switch is separated from the mechanical lock trigger assembly, the mechanical lock working assembly is embedded into the base 1 again, the transmission shaft device 6 is fixed in the circumferential direction, the transmission shaft device 6 is locked again, and the mistaken switching-on is avoided.

In this embodiment, the mechanical lock working assembly includes a mechanical lock reset piece 911 and a locking barrel 912, the mechanical lock reset piece 911 and the locking barrel 912 are respectively sleeved in the transmission shaft device 6, the locking barrel 912 is circumferentially fixed on the transmission shaft device 6 and axially slides along the transmission shaft device 6, the mechanical lock reset piece 911 is installed between the operating handle 8 and the locking barrel 912, the mechanical lock reset piece 911 is a pressure spring, one end of the pressure spring abuts against the operating handle 8 and the other end of the pressure spring abuts against the locking barrel 912, the mechanical lock reset piece 911 acts in a direction to press the locking barrel 912 towards the base 1, the inner wall of the locking barrel 912 is provided with a mechanical lock guide protrusion 9122 and the transmission shaft device 6 is provided with a locking guide groove 611, the mechanical lock guide protrusion 9122 slides along the locking guide groove 611 to make the locking barrel 912 slide along the axial direction of the transmission shaft device 6 and circumferentially fix the locking barrel 912 and the transmission shaft device 6, one side of the locking barrel 912 close to the, base 1 lateral wall is equipped with a plurality of and each spacing tooth 9121 corresponds the spacing hole of complex tooth 11, spacing tooth 9121 detachable embedding base 1, transmission shaft device 6 and then locking switch subassembly 4 are firmly fixed to circumference during spacing tooth 9121 embedding base 1, avoid switch subassembly 4's maloperation, the isolator action bars pulls mechanical lock trigger assembly and then pulls locking bucket 912 along 6 axial sliding of transmission shaft device when needing to carry out the divide-shut brake operation, spacing tooth 9121 breaks away from the contact with the spacing hole of tooth 11 and removes to fixed to transmission shaft device 6's circumference, because the isolator action bars exerts pressure to mechanical lock trigger assembly this moment, also exert pressure to operating handle 8, the isolator action bars can pull operating handle 8 and carry out the divide-shut brake operation like this.

In this embodiment, the operation handle 8 is provided with an operation notch 81, the mechanical lock trigger assembly includes an operation panel 921, a first guide ring 922, a second guide ring 923 and a mechanical lock pulling rope 924, the first guide ring 922 and the second guide ring 923 are both fixedly mounted on one side of the operation handle 8 close to the base 1, one end of the operation panel 921 is hinged to the operation notch 81, the other end of the operation panel 921 is fixedly mounted with the mechanical lock pulling rope 924, the operation handle 8 is provided with a limit block 82, the limit block 82 supports the operation panel 921 on one side of the operation panel 921 close to the operation notch 81, the rotation amplitude of the operation panel 921 is limited to prevent the operation panel 921 from separating from the operation notch 81, one end of the mechanical lock pulling rope 924 is fixedly mounted on the operation panel 921, the other end of the mechanical lock pulling rope 924 is fixedly mounted on the mechanical lock working assembly, the mechanical lock pulling rope 924 sequentially passes through the first guide ring 922 and the second guide ring 923, the direction of the mechanical lock pulling rope 924 between the first, the direction of the mechanical lock pulling rope 924 between the second guide ring 923 and the mechanical lock assembly is parallel to the transmission shaft device 6, the disconnecting switch operating lever inevitably hooks the operation notch 81 to operate when performing switching on and off operation, the operation plate 921 is firstly pressed before the operation notch 81 is hooked and pressed, the operation plate 921 rotates to further pull the mechanical lock pulling rope 924 to move, under the guide of the first guide ring 922 and the second guide ring 923, the mechanical lock pulling rope 924 pulls the mechanical lock working assembly, specifically, the mechanical lock pulling barrel 912 slides along the transmission shaft device 6 to be separated from contact with the base 1, so that the purpose of switching on and off can be performed only when the disconnecting switch operating lever presses the operation plate 921, and the mistaken switching-off and mistaken switching-on are prevented.

In this embodiment, the transmission shaft device 6 includes a first rotating shaft 61, a second rotating shaft 62 and an angle adjusting ring 63, the first rotating shaft 61 and the second rotating shaft 62 are both rotatably installed on the base 1, it is noted that the first rotating shaft 61 and the second rotating shaft 62 are both installed on the base 1 through bearings, specifically, the bearings are self-aligning roller bearings, in order to ensure the stability of the first rotating shaft 61 and the second rotating shaft 62, the second rotating shaft 62 is installed on the base 1 through at least two bearings at different positions in the axial direction, a plurality of first shaft guide grooves are equidistantly arranged on the peripheral surface of the first rotating shaft 61, a plurality of angle ring guide protrusions 631 are equidistantly arranged in the inner hole of the angle adjusting ring 63, each angle ring guide protrusion 631 is embedded in the corresponding first shaft guide groove to slide, thereby realizing that the angle adjusting ring 63 is circumferentially and fixedly installed on the first rotating shaft 61 and slides axially along the first rotating shaft 61, a plurality of second shaft guide grooves 621 which are axially arranged are equidistantly arranged on the peripheral surface of the second rotating shaft 62, a plurality of angle ring guide protrusions 631 which are axially arranged are equidistantly arranged on an inner hole of the angle adjusting ring 63, and each angle ring guide protrusion 631 is embedded into the corresponding second shaft guide groove 621 to slide, so that the angle adjusting ring 63 is detachably fixed with the second rotating shaft 62 in the circumferential direction;

the operating handle 8 is fixedly arranged at the tail end of the first rotating shaft 61, the second rotating shaft 62 is provided with three transmission connecting levers 66 at positions corresponding to the disconnecting link assemblies 4, the self-locking connecting levers 67 are integrally arranged on the second rotating shaft 62, because the three-phase linkage isolating switch has a plurality of different installation angles, the angle of the operating handle 8 must be adjusted according to the angle of the base 1, because the installation angle of the transmission connecting levers 66 rotates along with the base 1, namely the angle between the operating handle 8 and the transmission connecting levers 66 needs to be adjusted, namely the operating handle 8 rotates around the second rotating shaft 62, when the angle of the operating handle 8 is adjusted, one hand presses the control plate 921 to remove the limitation of the locking barrel 912 on the base 1, the other hand stirs the angle adjusting ring 63 to ensure that the angle adjusting ring 63 is separated from contact with the second rotating shaft 62, at the moment, the angle of the operating handle 8 can be adjusted by independently rotating the operating handle 8, so, the adjustment can be completed by hand without using tools, so that the adjustment is convenient and fast.

In this embodiment, the transmission shaft device 6 further includes a rotation shaft return spring 64, the first rotation shaft 61 is integrally provided with a return step 612, one end of the rotation shaft return spring 64 presses the return step 612 and the other end presses the angle adjustment ring 63, when the rotation shaft return spring 64 is in a free state, the angle adjustment ring 63 crosses over the first rotation shaft 61 and the second rotation shaft 62, so that the angle adjustment ring 63 is circumferentially fixed with both the first rotation shaft 61 and the second rotation shaft 62, when the rotation shaft return spring 64 is at a compression limit position, the angle adjustment ring 63 is separated from the second rotation shaft 62, when an angle between the first rotation shaft 61 and the second rotation shaft 62 needs to be changed, the angle adjustment ring 63 is pulled, so that the rotation shaft return spring 64 is compressed to a limit position, the angle adjustment ring 63 is separated from the contact with the second rotation shaft 62, then the operation handle 8 is rotated to a proper angle, after the adjustment, the angle adjustment ring 63 is loosened so that the angle adjustment ring 63 crosses over the first rotation shaft 61 and the second rotation shaft, so that the angle adjusting ring 63 is circumferentially fixed to both the first rotating shaft 61 and the second rotating shaft 62.

Transmission shaft device 6 still includes spacing jump ring 65, spacing jump ring 65 is installed on second pivot 62, angle adjustment ring 63 blocks spacing jump ring 65 when the reset spring is in the extreme spacing of extension, the position of angle adjustment ring 63 is limited, prevent that angle adjustment ring 63 from droing, angle adjustment ring 63 an organic whole is provided with dustproof and waterproof ring 632, dustproof and waterproof ring 632 encloses into with first pivot 61 and keeps apart the chamber, pivot reset spring 64 is installed in keeping apart the intracavity, dustproof and waterproof ring 632 avoids pivot reset spring 64 directly to expose in the external world and by corrosion failure.

In this embodiment, the isolating switch further comprises an anti-unhooking device, the anti-unhooking device is installed on the disconnecting link assembly 4, the hinge hole between the connecting rod device 5 and the disconnecting link assembly 4 is a long hole, the movable contact base 21 is provided with an anti-unhooking slot 211, one end of the anti-unhooking device is connected to the upper side of the connecting rod device 5, the other end of the anti-unhooking device is detachably embedded into the anti-unhooking slot 211, the connecting rod device 5 slides along the direction of the, the isolating switch also comprises an anti-falling elastic reset piece, one end of the anti-falling elastic reset piece is arranged on the disconnecting link component 4, the other end of the anti-falling elastic reset piece is connected with an anti-falling hook device, anticreep elasticity resets and acts on the direction and makes mousing-hook device embedding anticreep draw-in groove 211, and mousing-hook device imbeds mousing-hook draw-in groove 211 under the anticreep elasticity resets traction action when switch-on of switch module 4, even self-locking spring 7 became invalid, switch module 4 also can be reliably fixed.

In this embodiment, each knife switch assembly 4 includes two conductive blades 41, a hinge bolt 42, a pressing spring 43, a pressing nut 44 and a pressing bolt 45, the two conductive blades 41 are clamped to correspond to the stationary contact base 22, the two conductive blades 41 are all hinged to the stationary contact base 22 through the hinge bolt 42, the two conductive blades 41 can be detachably clamped to correspond to the movable contact base 21, the pressing bolt 45 sequentially penetrates through the two conductive blades 41 and the pressing spring 43, the pressing bolt 45 is in threaded connection with the pressing nut 44 to clamp the two conductive blades 41, one end of the pressing spring 43 abuts against the pressing nut 44, the other end of the pressing spring 43 abuts against the pressing bolt 45, the pressing spring 43 provides elastic support when the two conductive blades 41 clamp the movable contact base 21, and it is ensured that the two conductive blades 41 reliably clamp the movable contact base 21.

In this embodiment, the unhooking prevention device includes an unhooking haulage rope 31, a fastening hook 32 and a guide post 34, the anti-falling elastic reset member is an elastic torsion member 33, the guide post 34 is fixedly installed between two conductive blades 41, the link device 5 is hinged between the two conductive blades 41, one end of the fastening hook 32 is hinged between the two conductive blades 41, and the other end is integrally provided with a hook 321 detachably connected with the anti-falling clamping groove 211, one end of the unhooking haulage rope 31 is fixedly installed at the top end of the link device 5, and the other end is fixedly installed on the fastening hook 32, the unhooking haulage rope 31 bypasses the guide post 34, one end of the elastic torsion member 33 is connected with the fastening hook 32, and the other end is connected with the conductive blade 41, the elastic torsion member 33 is a torsion spring, one end of the torsion spring is connected with the fastening hook 32, and the other end is connected with the conductive, the transmission crank arm 66 pushes the connecting rod device 5 to slide upwards, the connecting rod device 5 slides along the direction of the long hole to further pull the unhooking traction rope 31, the unhooking traction rope 31 overcomes the elasticity of the elastic torsion piece 33 to pull the hook 321 out of the anti-dropping clamping groove 211 to realize brake separation, and brake separation can be realized only when the operation handle 8 is rotated.

The position of the fastening hook 32 fixedly provided with the unhooking traction rope 31 is a rope traction position, and the distance between the rope traction position and the hinged position of the fastening hook 32 is smaller than the distance between the rope traction position and the hook 321, so that the small stroke motion of the unhooking traction rope 31 can be converted into the large stroke motion of the hook 321, the real-time control response of the operating handle 8 is ensured, and the rotating distance of the operating handle 8 is shortened.

The hook 321 is provided with a guide inclined surface, the unhooking traction rope 31 pulls the fastening hook 32 in the sliding process of the connecting rod device 5 along the long hole, and the motion trail of the guide inclined surface passes through the movable contact base 21, so that when the connecting rod device is switched on, the guide inclined surface firstly contacts the movable contact base 21, then the fastening hook 32 slightly swings under the guide of the guide inclined surface, and then continuously slides downwards until being embedded into the anti-falling clamping groove 211, and the fastening hook 32 is prevented from colliding with the movable contact base 21.

Having shown and described the fundamental principles and the principal features of the invention and its advantages, it will be understood by those skilled in the art that the present invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. The three-phase linkage isolating switch is characterized by comprising a base, three movable contact seats, three stationary contact seats, three disconnecting link assemblies, three connecting rod devices, a plurality of supporting insulators, a transmission shaft device, a self-locking spring, an operating handle, an unhooking prevention device and a mechanical lock device, wherein the operating handle is fixedly arranged at the tail end of the transmission shaft device, the three movable contact seats and the three stationary contact seats are arranged on the base through the supporting insulators, one end of each disconnecting link assembly is hinged on the corresponding stationary contact seat, the other end of each disconnecting link assembly is movably connected with the corresponding movable contact seat in a contact manner, the transmission shaft device is rotatably arranged on the base, three transmission crank arms are arranged at positions of the transmission shaft device corresponding to the disconnecting link assemblies, one end of each connecting rod device is hinged on the corresponding disconnecting link assembly, the other end of each connecting rod device is hinged on the corresponding transmission crank arm, and the transmission crank, one end of the self-locking spring is hinged on the self-locking crank arm, and the other end of the self-locking spring is hinged on the base; the mechanical lock device comprises a mechanical lock trigger assembly arranged on an operating handle and a mechanical lock working assembly sliding axially along a transmission shaft device, the mechanical lock trigger assembly is in transmission connection with the mechanical lock working assembly, the mechanical lock working assembly is circumferentially fixed with the transmission shaft device and is detachably embedded into a base, the unhooking prevention device is arranged on a disconnecting link assembly and is in transmission connection with a connecting rod device, and the unhooking prevention device is detachably embedded into a movable contact base under the traction of the connecting rod device.

2. The three-phase linkage isolating switch according to claim 1, wherein the mechanical lock working assembly comprises a mechanical lock resetting piece and a locking barrel, the mechanical lock resetting piece is installed between the operating handle and the locking barrel, two ends of the mechanical lock resetting piece respectively support against the operating handle and the locking barrel, the mechanical lock resetting piece acts in a direction to press the locking barrel to the base, the locking barrel slides along the axial direction of the transmission shaft device and is circumferentially fixed with the transmission shaft device, and the locking barrel is detachably connected with the base.

3. The three-phase linkage isolating switch according to claim 1, wherein the operating handle is provided with an operating notch, the mechanical lock trigger assembly comprises a control plate, a first guide ring, a second guide ring and a mechanical lock traction rope, the first guide ring and the second guide ring are fixedly arranged on one side of the operating handle close to the base, one end of the control plate is hinged on the control notch, the other end of the control plate is fixedly provided with a mechanical lock traction rope, the operating handle is provided with a limiting block which is arranged on one side of the operating plate close to the operating notch and supports against the operating plate, one end of the mechanical lock traction rope is fixedly arranged on the control plate, the other end of the mechanical lock traction rope is fixedly arranged on the mechanical lock working assembly, the mechanical lock traction rope sequentially passes through the first guide ring and the second guide ring, the direction of the mechanical lock traction rope between the first guide ring and the second guide ring is parallel to the operating handle, the direction of the mechanical lock pulling rope between the second guide ring and the mechanical lock component is parallel to the transmission shaft device.

4. The three-phase linkage isolating switch according to claim 1, wherein the transmission shaft device comprises a first rotating shaft, a second rotating shaft and an angle adjusting ring, the first rotating shaft and the second rotating shaft are rotatably mounted on the base, the operating handle is fixedly mounted at the tail end of the first rotating shaft, three transmission crank arms are arranged at positions of the second rotating shaft corresponding to the disconnecting link assemblies, the self-locking crank arms are integrally arranged on the second rotating shaft, the angle adjusting ring is circumferentially and fixedly mounted on the first rotating shaft and axially slides along the first rotating shaft, and the angle adjusting ring is detachably circumferentially fixed with the second rotating shaft.

5. The three-phase linkage isolating switch according to claim 4, wherein the transmission shaft device further comprises a rotating shaft reset spring, the first rotating shaft is integrally provided with a reset step, one end of the rotating shaft reset spring presses the reset step, the other end of the rotating shaft reset spring presses the angle adjusting ring, the angle adjusting ring is circumferentially fixed with the first rotating shaft and the second rotating shaft when the rotating shaft reset spring is in a free state, and the angle adjusting ring is separated from the second rotating shaft when the rotating shaft reset spring is in a compression limit position.

6. The three-phase linkage isolating switch according to claim 1, wherein the anti-tripping device is installed on the disconnecting link assembly, the hinge hole of the connecting rod device and the disconnecting link assembly is a long hole, the movable contact base is provided with an anti-tripping groove, one end of the anti-tripping device is connected to the upper side of the connecting rod device, the other end of the anti-tripping device is detachably embedded into the anti-tripping groove, the connecting rod device slides along the direction of the long hole to pull the anti-tripping device, the isolating switch further comprises an anti-tripping elastic reset piece, one end of the anti-tripping elastic reset piece is installed on the disconnecting link assembly, the other end of the anti-tripping elastic reset piece is connected with the anti-tripping device, and the anti-.

7. The three-phase linkage isolating switch according to claim 6, wherein each switch component comprises two conductive blades, a hinge bolt, a compression spring, a compression nut and a compression bolt, the two conductive blades clamp the corresponding stationary contact base, the two conductive blades are both hinged to the stationary contact base through the hinge bolt, the two conductive blades are detachably clamped to the corresponding movable contact base, the compression bolt sequentially penetrates through the two conductive blades and the compression spring, the compression bolt and the compression nut are in threaded connection to clamp the two conductive blades, and one end of the compression spring abuts against the compression nut and the other end of the compression spring abuts against the compression bolt.

8. The three-phase linkage isolating switch according to claim 7, wherein the anti-drop device comprises an anti-drop pulling rope, a fastening hook and a guiding column, the anti-drop elastic reset member is an elastic torsion member, the guiding column is fixedly arranged between the two conductive blades, the connecting rod device is hinged between the two conductive blades, one end of the fastening hook is hinged between the two conductive blades, the other end of the fastening hook is integrally provided with a hook detachably connected with the anti-drop clamping groove, one end of the anti-drop pulling rope is fixedly arranged at the top end of the connecting rod device, the other end of the anti-drop pulling rope is fixedly arranged on the fastening hook, the anti-drop pulling rope bypasses the guiding column, one end of the elastic torsion member is connected with the fastening hook, the other end of the elastic torsion member is connected with the conductive blade, and the.

9. The three-phase linkage isolating switch according to claim 8, wherein the position where the fastening hook is fixedly provided with the unhooking traction rope is a rope pulling position, and the distance from the rope pulling position to the hinge position of the fastening hook is smaller than the distance from the rope pulling position to the hook.

10. The three-phase linkage isolating switch according to claim 8, wherein the elastic torsion element is a torsion spring, one end of the torsion spring is connected with the fastening hook, the other end of the torsion spring is connected with the conductive blade, and the action direction of the torsion spring enables the hook to be embedded into the anti-falling clamping groove.