A disconnect switch with limit device

Abstract

The invention discloses an isolating switch with a limit device, which relates to the technical field of isolating switches and comprises a base, wherein two supporting insulators are fixedly connected to the top of the base. The isolating switch with a limit device is provided with a plug, a first slot and a second slot. By using the two plugs, a double limit function can be realized when the switch is closed. Through the second slot, the position of the isolating knife switch can be fixed when the switch is opened to ensure the safety of maintenance personnel. When the wind force is strong, the force applied to the pneumatic shaft by the wind force is greater than the resistance of the counterweight sleeve to the pneumatic shaft, indicating that the wind force reaches the standard for fixing the limit device. At this time, the piston chamber works to input gas into the airbag, so that the airbag pushes one end of the driving column to support the end of the driving block, so that the limit device is locked, to prevent the isolating knife switch from being released from the locked state when the wind force is strong, resulting in failure of closing and opening the switch, and the occurrence of accidents.

Description

Technical Field

[0001] The invention relates to the technical field of isolating switches, in particular to an isolating switch with a limit device. Background Art

[0002] High-voltage disconnectors are common switchgear in the electrical systems of power plants and substations. They are mainly used to ensure the safety of high-voltage equipment during maintenance and have a great impact on the safe operation of power plants and substations. In order to ensure that high-voltage disconnectors will not cause safety accidents due to loose blades during use, most of the common high-voltage disconnectors on the market are equipped with locking mechanisms. However, most of these locking mechanisms are supported by springs. However, when encountering strong winds, the locking mechanism will shake, resulting in locking failure, closing and opening failure, and accidents. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides an isolating switch with a limit device, which solves the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A disconnector with a limit device, comprising a base, wherein two post insulators are fixedly connected to the top of the base, a fixing seat is fixedly connected to the top of one of the post insulators, and a mounting seat is fixedly connected to the top of the other post insulator, two vertical plates are fixedly connected to the top of the mounting seat, a driving tube is rotatably connected between the two vertical plates, and an isolating knife switch is fixedly connected to the outside of the driving tube, a side plate is fixedly connected to one side of the isolating knife switch, a moving box is fixedly connected to one side of the side plate, a locking box is fixedly connected to the bottom of the moving box, two driving blocks are slidably connected inside the locking box, one end of the driving block extends to the outside of the locking box and is fixedly connected to a plug, the bottom of the side plate and one end of the plug are fixedly connected to a guide block, a driving groove is opened inside the locking box and below the driving block, an air bag is fixedly connected to one side of the inner cavity of the driving groove, one end of the air bag is fixedly connected to a driving column, and one end of the driving column extends to the inner cavity of the locking box.

[0005] Preferably, a return spring is fixedly connected to the other side of the inner cavity of the driving groove, one end of the return spring is fixedly connected to one side of the driving column, a second rotating seat is provided on one side of the driving block, the moving box is slidably connected to the moving block, two first rotating seats are provided at the bottom of the moving block, a connecting rod is rotatably connected between the first rotating seat and the second rotating seat, the top of the moving block is fixedly connected to a pull ring, the moving box is slidably connected to the outside of the pull ring with a supporting spring, the bottom end of the supporting spring is fixedly connected to the top of the moving block, the top of the inner cavity of the moving box is fixedly connected to the top of the supporting spring, the top of the pull ring extends to the top of the moving box, and the first connecting spring is fixedly connected to both sides of the inner cavity of the locking box, and one end of the first connecting spring is fixedly connected to one side of the driving block.

[0006] Preferably, the top of the base is fixedly connected to a driving box, the inner cavity of the driving box is rotatably connected to a pneumatic shaft, the top of the pneumatic shaft extends to the top of the driving box, one side of the driving box is fixedly connected to a counterweight box, one side of the inner cavity of the driving box is rotatably connected to a driving rod, one end of the driving rod extends to the inside of the counterweight box, and a plurality of counterweight sleeves are provided on the outer movable sleeve of the driving rod, and the outer sides of the driving rod and the pneumatic shaft are fixedly sleeved with meshing bevel gears, a limiting groove is provided on the outer side of the driving rod, and one end of the limiting groove extends to the outside of the driving rod, and limiting blocks are installed on the inner side of the counterweight sleeve and inside the limiting groove, and one side of the counterweight box is fixedly connected to a box plate by screws.

[0007] Preferably, one side of the box plate is fixedly connected to a driving frame, one side of the driving frame is fixedly connected to a threaded block, the threaded block is internally threaded with a screw rod, one end of the screw rod extends to one side of the threaded block and is connected to a push block through a shaft sleeve, the outer side of the push block is slidably connected to the driving frame, both ends of the push block extend to the inner side of the box plate and are fixedly connected to a limiting ring, and the limiting ring is in contact with the end of the counterweight sleeve.

[0008] Preferably, a connecting groove is provided inside the return spring, the bottom end of the pneumatic shaft extends into the connecting groove and is rotatably connected to the bottom of the inner cavity of the connecting groove, a cam is provided on the outer fixed sleeve of the pneumatic shaft, a piston cavity is provided inside the return spring and on one side of the connecting groove, a driving piston block is slidably connected inside the piston cavity, one end of the driving piston block extends into the connecting groove, one side of the inner cavity of the connecting groove and one end of the driving piston block are fixedly connected with a second connecting spring, one end of the second connecting spring is fixedly connected to the end of the driving piston block, a discharge pipe is fixedly connected inside the return spring and on one side of the piston cavity, a suction pipe is fixedly connected inside the return spring and above the piston cavity, one end of the suction pipe and the discharge pipe extend into the piston cavity and are both provided with a one-way valve, the other end of the suction pipe extends to the top of the return spring, and the other end of the discharge pipe extends to above the mounting seat.

[0009] Preferably, a fixing block is fixedly connected to one side of one of the vertical plates, a first slot is provided at one end of the fixing seat and the fixing block, a second slot is provided at one side of the fixing block, a rotating joint is installed on one side of the fixing block, one end of the row pipe is connected to one end of the rotating joint, the other end of the rotating joint is connected to one end of the driving tube, and a pipeline is fixedly connected to the outside of the driving tube, an air cavity is provided inside the locking box, one end of the pipeline passes through the side plate and extends into the air cavity, a connecting tube is fixedly connected to the bottom of the airbag, one end of the connecting tube extends into the air cavity, a spring assembly is installed on one side of another of the vertical plates, and one end of the driving tube is connected to the spring assembly.

[0010] Preferably, an unlocking block is fixedly connected to one side of the moving box, and the top of the unlocking block is rotatably connected to a rotating knob, a friction plate is provided inside the unlocking block, the bottom end of the rotating knob passes through the friction plate and extends to the inside of the unlocking block and is fixedly connected to a rotating disk, a connecting hole is provided at the bottom of the rotating disk, and a through pipe is fixedly connected to the top of the unlocking block, and the unlocking block is connected to the inside of the air cavity.

[0011] Preferably, a lever is fixedly connected to the outer side of the rotating knob and located above the unlocking block, and a clamping point is fixedly connected to the top of the unlocking block and located on the other side of the lever.

[0012] The present invention provides an isolating switch with a limit device, which has the following beneficial effects:

[0013] 1. The isolating switch with a limit device is provided with a plug, a first slot and a second slot. By using two plugs, a double limit function can be realized when closing the switch. Through the second slot, the position of the isolating knife switch can be fixed when opening the switch to ensure the safety of the maintenance personnel. When the wind is strong, the force applied to the pneumatic shaft by the wind is greater than the resistance of the counterweight sleeve to the pneumatic shaft, which means that the wind force reaches the standard for fixing the limit device. At this time, the piston chamber works to input gas into the airbag, so that the airbag pushes one end of the driving column to support the end of the driving block, so that the limit device is locked to prevent the isolating knife switch from being released from the locked state when the wind is strong, resulting in failure of closing and opening the switch, and an accident.

[0014] 2. The isolating switch with a limit device is provided with a rotating knob, a through pipe and a connecting hole. After locking, when unlocking is required, the operator twists the rotating knob so that the rotating knob drives the pulling rod to rotate, so that the pulling rod contacts the card point, and at the same time, the rotating knob drives the rotating disk to rotate, so that the connecting hole rotates to the bottom of the through pipe, so that the through pipe is connected with the connecting hole, so that the gas inside the airbag enters the air cavity through the connecting pipe, and then is discharged to the outside through the unlocking block, the connecting hole and the through pipe, so that the air pressure inside the airbag is reduced. At this time, the driving groove pushes the driving column and the airbag to reset and move, and then the operator resets and twists the rotating knob, so that the rotating knob drives the rotating disk to reset and rotate, so that the connecting hole rotates to the initial position, so that the through pipe is disconnected from the connecting hole, and the inside of the air cavity is sealed. Then, the limit device can be unlocked through the pull ring to perform closing and opening operations, and the locked state of the limit device can be conveniently released, so that the closing and opening operations can be performed through the pull ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the closing structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the circuit breaker structure of the present invention;

[0017] Figure 3 It is a partial structural schematic diagram of the present invention;

[0018] Figure 4 It is a schematic diagram of the side view of the side panel of the present invention;

[0019] Figure 5 For the present invention Figure 1 A magnified image of point A;

[0020] Figure 6 For the present invention Figure 1 Enlarged view of point B.

[0021] In the figure: 1, base; 2, reset spring; 3, support insulator; 4, fixed seat; 5, mounting seat; 6, vertical plate; 7, isolating knife switch; 8, side plate; 9, moving box; 10, support spring; 11, pull ring; 12, moving block; 13, first rotating seat; 14, driving block; 15, second rotating seat; 16, connecting rod; 17, first connecting spring; 18, driving slot; 19, driving column; 20, air bag; 21, connecting pipe; 22, plug; 23, guide block; 24, first slot; 25, fixed block; 26, second slot; 27, driving box; 28, pneumatic shaft ; 29. ​​Drive rod; 30. Counterweight box; 31. Air cavity; 32. Locking box; 33. Counterweight sleeve; 34. Box plate; 35. Drive frame; 36. Push block; 37. Threaded block; 38. Screw; 39. Limiting ring; 40. Connecting groove; 41. Cam; 42. Drive piston block; 43. Second connecting spring; 44. Piston cavity; 45. Straw; 46. Drain pipe; 47. Unlocking block; 48. Turning knob; 49. Turning disk; 50. Friction plate; 51. Through pipe; 52. Connecting hole; 53. Rotary joint; 54. Pipeline; 55. Spring assembly; 57. Bevel gear. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Embodiment 1

[0024] See also Figures 1 to 6 The present invention provides a technical solution: an isolating switch with a limit device, comprising a base 1, two support insulators 3 are fixedly connected to the top of the base 1, a fixed seat 4 is fixedly connected to the top of one support insulator 3, a mounting seat 5 is fixedly connected to the top of the other support insulator 3, two vertical plates 6 are fixedly connected to the top of the mounting seat 5, a driving tube is rotatably connected between the two vertical plates 6, and an isolating knife switch 7 is fixedly connected to the outside of the driving tube, a side plate 8 is fixedly connected to one side of the isolating knife switch 7, a moving box 9 is fixedly connected to one side of the side plate 8, and a moving box 9 is fixedly connected to the moving box 9. A locking box 32 is fixedly connected to the bottom of the box 9, and two driving blocks 14 are slidably connected inside the locking box 32. One end of the driving block 14 extends to the outside of the locking box 32 and is fixedly connected to the plug 22. A guide block 23 is fixedly connected to the bottom of the side panel 8 and one end of the plug 22. A driving groove 18 is opened inside the locking box 32 and below the driving block 14. An air bag 20 is fixedly connected to one side of the inner cavity of the driving groove 18, and one end of the air bag 20 is fixedly connected to a driving column 19. One end of the driving column 19 extends to the inner cavity of the locking box 32.

[0025] Among them, a return spring 2 is fixedly connected to the other side of the inner cavity of the driving groove 18, one end of the return spring 2 is fixedly connected to one side of the driving column 19, a second rotating seat 15 is provided on one side of the driving block 14, a moving block 12 is slidably connected inside the moving box 9, two first rotating seats 13 are provided at the bottom of the moving block 12, a connecting rod 16 is rotatably connected between the first rotating seat 13 and the second rotating seat 15, a pull ring 11 is fixedly connected to the top of the moving block 12, a support spring 10 is slidably connected inside the moving box 9 and on the outside of the pull ring 11, the bottom end of the support spring 10 is fixedly connected to the top of the moving block 12, the top of the inner cavity of the moving box 9 is fixedly connected to the top of the support spring 10, and the top of the pull ring 11 extends to the top of the moving box 9, and the first connecting spring 17 is fixedly connected to both sides of the inner cavity of the locking box 32, one end of the first connecting spring 17 is fixedly connected to one side of the driving block 14, and the first connecting spring 17 can be used to push the driving block 14 and the plug 22 to move.

[0026] Among them, the top of the base 1 is fixedly connected to a driving box 27, the inner cavity of the driving box 27 is rotatably connected to a pneumatic shaft 28, the top of the pneumatic shaft 28 extends to the top of the driving box 27, one side of the driving box 27 is fixedly connected to a counterweight box 30, one side of the inner cavity of the driving box 27 is rotatably connected to a driving rod 29, one end of the driving rod 29 extends to the inside of the counterweight box 30, the outer side of the driving rod 29 is movably sleeved with a plurality of counterweight sleeves 33, and the outer sides of the driving rod 29 and the pneumatic shaft 28 are both fixedly sleeved with The bevel gears 57 are meshed with each other, and a limiting groove is provided on the outer side of the driving rod 29, and one end of the limiting groove extends to the outer side of the driving rod 29. A limiting block is installed on the inner side of the counterweight sleeve 33 and inside the limiting groove. One side of the counterweight box 30 is fixedly connected to the box plate 34 by screws, and the counterweight sleeve 33 can be replaced as needed. The counterweight sleeve 33 is connected to the limiting groove and the driving rod 29 through the limiting block, so that the driving rod 29 can drive the counterweight sleeve 33 to rotate through the limiting groove and the limiting block.

[0027] Among them, one side of the box plate 34 is fixedly connected to a driving frame 35, one side of the driving frame 35 is fixedly connected to a threaded block 37, the internal thread of the threaded block 37 is connected to a screw rod 38, one end of the screw rod 38 extends to one side of the threaded block 37 and is connected to a push block 36 through a shaft sleeve, the outer side of the push block 36 is slidably connected to the driving frame 35, both ends of the push block 36 extend to the inner side of the box plate 34 and are fixedly connected to a limiting ring 39, the limiting ring 39 is in contact with the end of the counterweight sleeve 33, the limiting ring 39 can contact the end of the counterweight sleeve 33, and the position of the counterweight sleeve 33 can be limited by moving the position of the limiting ring 39, and the fixing needs of different numbers of counterweight sleeves 33 can be met.

[0028] Among them, a connecting groove 40 is opened inside the return spring 2, and the bottom end of the pneumatic shaft 28 extends into the connecting groove 40 and is rotatably connected to the bottom of the inner cavity of the connecting groove 40. A cam 41 is provided on the outer fixed sleeve of the pneumatic shaft 28. A piston cavity 44 is opened inside the return spring 2 and on one side of the connecting groove 40. A driving piston block 42 is slidably connected inside the piston cavity 44. One end of the driving piston block 42 extends into the connecting groove 40. A second connecting spring 43 is fixedly connected to one side of the inner cavity of the connecting groove 40 and on one end of the driving piston block 42. One end of the second connecting spring 43 is fixedly connected to the end of the driving piston block 42. A discharge pipe 46 is fixedly connected to the piston cavity 44 on one side, and a suction pipe 45 is fixedly connected to the interior of the return spring 2 and above the piston cavity 44. One end of the suction pipe 45 and the discharge pipe 46 extend into the piston cavity 44 and are both provided with a one-way valve. The other end of the suction pipe 45 extends to the top of the return spring 2, and the other end of the discharge pipe 46 extends to above the mounting seat 5. When a certain amount of air is input into the airbag 20, the wind force can no longer drive the pneumatic shaft 28 to drive the cam 41 to rotate, so that the cam 41 drives the piston block 42 to move, and air is input into the airbag 20. At this time, the pneumatic shaft 28 can no longer continue to rotate under the push of the wind force.

[0029] Among them, a fixed block 25 is fixedly connected to one side of a vertical plate 6, a first slot 24 is provided at one end of the fixed seat 4 and the fixed block 25, a second slot 26 is provided at one side of the fixed block 25, a rotary joint 53 is installed on one side of the fixed block 25, one end of the discharge pipe 46 is connected to one end of the rotary joint 53, the other end of the rotary joint 53 is connected to one end of the driving pipe, and a pipeline 54 is fixedly connected to the outside of the driving pipe, an air cavity 31 is provided inside the locking box 32, one end of the pipeline 54 passes through the side plate 8 and extends to the inside of the air cavity 31, a connecting pipe 21 is fixedly connected to the bottom of the airbag 20, one end of the connecting pipe 21 extends to the inside of the air cavity 31, a spring assembly 55 is installed on one side of another vertical plate 6, one end of the driving pipe is connected to the spring assembly 55, and can transport the air input from the piston cavity 44 to the inside of the airbag 20.

[0030] Among them, an unlocking block 47 is fixedly connected to one side of the moving box 9, and a rotating knob 48 is rotatably connected to the top of the unlocking block 47. A friction plate 50 is arranged inside the unlocking block 47. The bottom end of the rotating knob 48 passes through the friction plate 50 and extends to the inside of the unlocking block 47 and is fixedly connected to a rotating disk 49. A connecting hole 52 is provided at the bottom of the rotating disk 49, and a through pipe 51 is fixedly connected to the top of the unlocking block 47. The unlocking block 47 is connected to the inside of the air cavity 31. By turning the rotating knob 48, the air inside the airbag 20 can be discharged, so that the limit device is locked and the isolation knife switch 7 can be closed and opened.

[0031] Embodiment 2

[0032] See also Figure 1 , Figure 2 and Figure 5 The present invention provides a technical solution: a lever is fixedly connected to the outside of a rotating knob 48 and located above the unlocking block 47, and a card point is fixedly connected to the top of the unlocking block 47 and located on the other side of the lever. The locking box 32 is made of a transparent material, and the driving column 19 is red. The position of the driving column 19 can be observed through the locking box 32 to determine whether the limit device is in a locked state. If so, the limit device needs to be unlocked before the closing or opening operation can be performed through the pull ring 11.

[0033] In summary, when the isolating switch with a limit device is used, the pull ring 11 can be hooked by the hook rod, so that the pull ring 11 pulls the moving block 12 to drive the first rotating seat 13, the connecting rod 16 and the second rotating seat 15 to move, so that the second rotating seat 15 drives one end of the plug 22 to move out of the first slot 24, and then the driving tube is driven to rotate by the clockwork assembly 55, so that the driving tube drives the isolating knife switch 7 and the side plate 8 to rotate, and then the operator releases the pull ring 11, at this time the support spring 10 pushes the moving block 12 to move downward, so that the moving block 12 drives the pull ring 11 to move downward, at this time the moving block 12 pushes the first rotating seat 13, the connecting rod 16 and the second rotating seat 15 to move, so that the second rotating seat 15 pushes the driving block 14 and one end of the plug 22, so that one end of a plug 22 is inserted into the second slot 26, and the position of the isolating knife switch 7 and the side plate 8 is limited, so that the closing and opening operations can be performed, and the opening can be performed during maintenance, and the position of the isolating knife switch 7 is fixed;

[0034] When the wind is strong, when the force applied to the pneumatic shaft 28 by the wind is greater than the resistance of the counterweight sleeve 33 to the pneumatic shaft 28, it means that the wind force reaches the standard that requires the limit device to be fixed. At this time, the pneumatic shaft 28 can drive the driving rod 29 to rotate through the bevel gear 57, and then the pneumatic shaft 28 drives the cam 41 to rotate. When the circular end of the cam 41 rotates toward the driving piston block 42, the second connecting spring 43 pushes the driving piston block 42 to move, so that the outside air is sucked into the piston cavity 44 through the suction tube 45. When the convex end of the cam 41 rotates toward the driving piston block 42, the driving piston block 42 resets and moves, so that the driving piston block 42 pushes the air inside the piston cavity 44 into the exhaust pipe 46. The air then enters the rotary joint 53 through the exhaust pipe 46, then enters the driving pipe through the rotary joint 53, then enters the air cavity 31 through the pipeline 54, and then enters the air bag 20 through the connecting pipe 21, and so on, so that the air bag 20 expands, so that the air bag 20 pushes one end of the driving column 19 to insert into the locking box 32, so that one end of the driving column 19 contacts one side of the driving block 14, and the position of the driving block 14 and the plug 22 is fixed, so that one end of the guide block 23 can be inserted into the first slot 24 or the second slot 26, and the position of the isolation knife switch 7 is locked to prevent the side plate 8 from being accidentally closed or accidentally opened due to strong wind force;

[0035] The counterweight on the outside of the driving rod 29 can be adjusted, and the wind force is set to reach the standard required to fix the limit device. At this time, the operator unscrews the screw, removes the box plate 34 from one side of the counterweight box 30, and then takes out the counterweight sleeve 33 from the outside of the driving rod 29, or puts the counterweight sleeve 33 on the outside of the driving rod 29, and then fixes the box plate 34 to one side of the counterweight box 30 by screws. Then the operator rotates the screw rod 38, so that the screw rod 38 pushes the push block 36 to move through the shaft sleeve, so that the push block 36 pushes the limit ring 39 to move, so that the limit ring 39 limits the end of the counterweight sleeve 33;

[0036] After locking, when unlocking is required, the operator turns the rotating knob 48, so that the rotating knob 48 drives the pulling rod to rotate, so that the pulling rod contacts the stuck point, and at the same time, the rotating knob 48 drives the rotating disk 49 to rotate, so that the connecting hole 52 rotates to the bottom of the through pipe 51, so that the through pipe 51 is connected with the connecting hole 52, so that the gas inside the airbag 20 enters the air cavity 31 through the connecting pipe 21, and then is discharged to the outside through the unlocking block 47, the connecting hole 52 and the through pipe 51, so that the air pressure inside the airbag 20 is reduced. At this time, the driving groove 18 pushes the driving column 19 and the airbag 20 to reset and move. Then the operator resets and turns the rotating knob 48, so that the rotating knob 48 drives the rotating disk 49 to reset and rotate, so that the connecting hole 52 rotates to the initial position, so that the through pipe 51 is disconnected from the connecting hole 52, and the inside of the air cavity 31 is sealed. Then, the limit device can be unlocked through the pull ring 11 to perform the closing and opening operations.

[0037] 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. An isolating switch with a limit device, comprising a base (1), characterized in that: Two post insulators (3) are fixedly connected to the top of the base (1); a fixing seat (4) is fixedly connected to the top of one post insulator (3); a mounting seat (5) is fixedly connected to the top of the other post insulator (3); two vertical plates (6) are fixedly connected to the top of the mounting seat (5); a driving tube is rotatably connected between the two vertical plates (6); an isolating knife switch (7) is fixedly connected to the outer side of the driving tube; a side plate (8) is fixedly connected to one side of the isolating knife switch (7); a moving box (9) is fixedly connected to one side of the side plate (8); a locking box (32) is fixedly connected to the bottom of the moving box (9) , two driving blocks (14) are slidably connected inside the locking box (32), one end of each driving block (14) extends to the outside of the locking box (32) and is fixedly connected to a plug (22), the bottom of the side plate (8) and one end of the plug (22) are fixedly connected to a guide block (23), the locking box (32) is provided with a driving groove (18) inside and below the driving block (14), one side of the inner cavity of each driving groove (18) is fixedly connected to an air bag (20), one end of the air bag (20) is fixedly connected to a driving column (19), and one end of the driving column (19) extends to the inner cavity of the locking box (32); A return spring (2) is fixedly connected to the other side of the inner cavity of each driving groove (18), and one end of each return spring (2) is fixedly connected to one side of the driving column (19). A second rotating seat (15) is provided on one side of the driving block (14). A moving block (12) is slidably connected inside the moving box (9). Two first rotating seats (13) are provided at the bottom of the moving block (12). A connecting rod (16) is rotatably connected between the first rotating seat (13) and the second rotating seat (15). The top of the moving block (12) is fixedly connected to a pulling rod. The movable box (9) comprises a ring (11), a support spring (10) is slidably connected inside the movable box (9) and on the outside of the pull ring (11), the bottom end of the support spring (10) is fixedly connected to the top end of the movable block (12), the top of the inner cavity of the movable box (9) is fixedly connected to the top end of the support spring (10), the top end of the pull ring (11) extends to the top of the movable box (9), and the first connecting spring (17) is fixedly connected to both sides of the inner cavity of the locking box (32), and one end of the first connecting spring (17) is fixedly connected to one side of the driving block (14); An unlocking block (47) is fixedly connected to one side of the moving box (9), a rotating knob (48) is rotatably connected to the top of the unlocking block (47), a friction plate (50) is arranged inside the unlocking block (47), a bottom end of the rotating knob (48) passes through the friction plate (50) and extends to the inside of the unlocking block (47) and is fixedly connected to a rotating disk (49), a communicating hole (52) is provided at the bottom of the rotating disk (49), a through pipe (51) is fixedly connected to the top of the unlocking block (47), an air cavity (31) is provided inside the locking box (32), and the unlocking block (47) is connected to the inside of the air cavity (31).

2. The isolating switch with a limit device according to claim 1, characterized in that: The top of the base (1) is fixedly connected to a driving box (27), the inner cavity of the driving box (27) is rotatably connected to a pneumatic shaft (28), the top end of the pneumatic shaft (28) extends to the top of the driving box (27), one side of the driving box (27) is fixedly connected to a counterweight box (30), one side of the inner cavity of the driving box (27) is rotatably connected to a driving rod (29), one end of the driving rod (29) extends to the inside of the counterweight box (30), and the driving rod ( The outer movable sleeve of the pneumatic shaft (29) is provided with a plurality of counterweight sleeves (33), the outer sides of the driving rod (29) and the pneumatic shaft (28) are fixedly provided with meshing bevel gears (57), the outer side of the driving rod (29) is provided with a limiting groove, and one end of the limiting groove extends to the outer side of the driving rod (29), the inner side of the counterweight sleeve (33) and the inside of the limiting groove are provided with limiting blocks, and one side of the counterweight box (30) is fixedly connected with a box plate (34) by screws.

3. The isolating switch with a limit device according to claim 2, characterized in that: One side of the box plate (34) is fixedly connected to a driving frame (35), one side of the driving frame (35) is fixedly connected to a threaded block (37), the threaded block (37) is internally threadedly connected to a screw rod (38), one end of the screw rod (38) extends to one side of the threaded block (37) and is connected to a push block (36) via a shaft sleeve, the outer side of the push block (36) is slidably connected to the driving frame (35), the two ends of the push block (36) extend to the inner side of the box plate (34) and are fixedly connected to a limiting ring (39), and the limiting ring (39) is in contact with the end of the counterweight sleeve (33).

4. The isolating switch with a limit device according to claim 2, characterized in that: A connecting groove (40) is provided inside the base (1), the bottom end of the pneumatic shaft (28) extends into the connecting groove (40) and is rotatably connected to the bottom of the inner cavity of the connecting groove (40), a cam (41) is provided on the outer fixed sleeve of the pneumatic shaft (28), a piston cavity (44) is provided inside the base (1) and located on one side of the connecting groove (40), a driving piston block (42) is slidably connected inside the piston cavity (44), one end of the driving piston block (42) extends into the connecting groove (40), one side of the inner cavity of the piston cavity (44) and located on one end of the driving piston block (42) is fixed A second connecting spring (43) is connected, one end of the second connecting spring (43) is fixedly connected to the end of the driving piston block (42), a discharge pipe (46) is fixedly connected inside the base (1) and located on one side of the piston cavity (44), a suction pipe (45) is fixedly connected inside the base (1) and located above the piston cavity (44), one end of the suction pipe (45) and the discharge pipe (46) both extend into the piston cavity (44) and are both provided with a one-way valve, the other end of the suction pipe (45) extends to the top of the base (1), and the other end of the discharge pipe (46) extends to the top of the mounting seat (5).

5. The isolating switch with a limit device according to claim 4, characterized in that: A fixed block (25) is fixedly connected to one side of one vertical plate (6), a first slot (24) is provided at one end of the fixed seat (4) and the fixed block (25), a second slot (26) is provided at one side of the fixed block (25), a rotating joint (53) is installed at one side of the fixed block (25), one end of the row pipe (46) is connected to one end of the rotating joint (53), the other end of the rotating joint (53) is connected to one end of the driving pipe, and a pipeline (54) is fixedly connected to the outside of the driving pipe, one end of the pipeline (54) passes through the side plate (8) and extends to the inside of the air cavity (31), the bottom of the airbag (20) is fixedly connected to a connecting pipe (21), one end of the connecting pipe (21) extends to the inside of the air cavity (31), and a spring assembly (55) is installed at one side of another vertical plate (6), one end of the driving pipe is connected to the spring assembly (55).

6. The isolating switch with a limit device according to claim 5, characterized in that: A lever is fixedly connected to the outside of the rotating knob (48) and located above the unlocking block (47), and a clamping point is fixedly connected to the top of the unlocking block (47) and located on the other side of the lever.

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