Five-prevention interlocking device for high-pressure chamber door of gas-filled cabinet
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SICHUAN BAOGUANG ELECTRICAL EQUIP CO LTD
- Filing Date
- 2026-04-03
- Publication Date
- 2026-06-19
AI Technical Summary
The lack of mechanical interlock between the front and rear doors of the high-voltage compartment of the gas-filled switchgear and the grounding of the main circuit poses a safety hazard. Furthermore, the absence of a reverse mechanical interlock makes it prone to accidents during maintenance.
A five-proof interlocking device for the high-voltage compartment door of a gas-insulated switchgear was designed, including an interlocking base, an interlocking knob, an interlocking turntable, a three-position switch limit assembly, a circuit breaker limit assembly, a power transmission assembly, a front door interlocking assembly, and a rear door interlocking assembly. Through the coordinated use of these components, the main circuit is ensured to be in a grounded state when the front and rear doors of the high-voltage compartment are opened, and the three-position switch is kept grounded and not opened when in the maintenance position.
It effectively protects the safety of operators, ensures that the main circuit is grounded when the front and rear doors of the high-voltage room are opened, prevents misoperation, and improves safety during maintenance.
Smart Images
Figure CN121964404B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of gas-insulated switchgear, and particularly to a five-proof interlocking device for the high-pressure chamber door of a gas-insulated switchgear. Background Technology
[0002] The gas-insulated switchgear contains high-voltage components such as circuit breakers, three-position switches, current transformers, voltage transformers, and primary circuit conductors. Figure 1 As shown, gas-insulated switchgear requires maintenance during operation. During maintenance, it is essential to ensure the main circuit is grounded, which necessitates that all three positions within the switchgear be in the grounded closed position and the circuit breaker be closed simultaneously. Once the main circuit is grounded, the front and rear doors of the high-voltage compartment can be opened. However, in existing technology, the opening of the front and rear doors of the high-voltage compartment lacks mechanical interlocking with the grounding status of the main circuit, and there is also no reverse mechanical interlocking (the main circuit cannot be grounded if the front and rear doors are not closed). Only a simple electromagnetic lock is used, which can easily lead to safety accidents during maintenance. Summary of the Invention
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a five-proof interlocking device for the high-pressure chamber door of a gas-filled switchgear.
[0004] The objective of this invention is achieved through the following technical solution:
[0005] The five-proof interlocking device for the high-voltage compartment door of a gas-insulated switchgear includes an interlocking base, an interlocking knob, an interlocking turntable, a three-position switch limit assembly, a circuit breaker limit assembly, a power transmission assembly, a front door interlocking assembly, and a rear door interlocking assembly. The interlocking base is fixedly mounted on the cabinet body. The interlocking knob is rotatably mounted on the interlocking base. The interlocking turntable is fixedly mounted on the interlocking knob. One end of the power transmission assembly is hinged to the edge of the interlocking turntable. The front door interlocking assembly and the rear door interlocking assembly are both connected to the other end of the power transmission assembly. The three-position switch limit assembly is mounted on the interlocking base and cooperates with the interlocking turntable. The circuit breaker limit assembly is mounted on the cabinet body and cooperates with the interlocking knob.
[0006] Furthermore, the three-position switch limiting assembly includes a three-position switch cam, a locking pin, a first spring, and a first drive rod. The locking pin is slidably disposed on the interlocking base, and one end of the locking pin is hinged to one end of the first drive rod. The middle part of the first drive rod is hinged to the interlocking base. A friction-reducing wheel is disposed on the other end of the first drive rod. The outer wall of the friction-reducing wheel cooperates with the outer wall of the ground switch cam. The interlocking turntable is provided with a limiting hole that cooperates with the other end of the locking pin. The first spring is sleeved on the locking pin, and one end of the spring abuts against the interlocking base. The other end of the spring abuts against the boss and drives the locking pin to be inserted into the limiting hole. The boss is fixedly disposed on the middle part of the locking pin.
[0007] Furthermore, the circuit breaker limiting assembly includes an eccentric arc plate, a second spring, and a second drive rod. The eccentric arc plate is fixedly mounted on the interlocking turntable and is not coaxially mounted with the interlocking knob. The outer wall of the eccentric arc plate engages with the upper end of the second drive rod. The second drive rod is slidably mounted on the cabinet. The second spring is sleeved on the second drive rod and its lower end abuts against the cabinet. A bearing ring is fixedly mounted on the middle part of the second drive rod. The upper end of the second spring abuts against the bearing ring and drives the second drive rod to move towards the eccentric arc plate. The lower end of the second drive rod engages with the circuit breaker switch button on the cabinet.
[0008] Furthermore, a limit switch is fixedly installed on the cabinet, and an eccentric semi-ring is provided on the interlocking turntable to cooperate with the limit switch. The eccentric semi-ring is not coaxially arranged with the interlocking knob.
[0009] Furthermore, the power transmission assembly includes a horizontal tie rod, a vertical tie rod, and a rotating rod. One end of the horizontal tie rod is hinged to the interlocking turntable via a first adjusting terminal, and the other end of the horizontal tie rod is hinged to a first swing rod via a second adjusting terminal. The first swing rod is fixedly mounted on a swing shaft, and the swing shaft is rotatably mounted on a transmission seat. The transmission seat is fixedly mounted on the cabinet. A second swing rod is fixedly mounted on the swing shaft. The upper end of the vertical tie rod is hinged to the second swing rod via a third adjusting terminal, and the lower end of the vertical tie rod is hinged to the third swing rod via a fourth adjusting terminal. The third swing rod is fixedly mounted on the middle part of the rotating rod. The front door interlock assembly and the rear door interlock assembly are respectively connected to the two ends of the rotating rod.
[0010] Furthermore, the front door interlock assembly includes a front door base, a front door tension spring, a front door push wheel, a front door push rod, and a front door locking rod. The front door base is fixedly mounted on the cabinet body, and the front door push rod is slidably mounted on the front door base. The upper end of the front door push rod cooperates with the front door push wheel fixed on the rotating rod, and the lower end of the front door push rod cooperates with one end of the front door locking rod. The middle part of the front door locking rod is hinged to the front door base, and the other end of the front door locking rod is provided with a front door locking groove that cooperates with the front door of the high-pressure chamber. The lower end of the front door tension spring is connected to the front door push rod, and the upper end of the front door tension spring is connected to the front door base.
[0011] Furthermore, a front door deadbolt component is fixedly installed on the front door base. The front door deadbolt component includes a front door deadbolt push rod, a front door deadbolt rotating rod, and a front door deadbolt spring. The front door deadbolt push rod is slidably installed on the front door base and one end engages with the front door of the high-pressure chamber. The other end of the front door deadbolt push rod is hinged to the lower end of the front door deadbolt rotating rod. The middle part of the front door deadbolt rotating rod is hinged to the front door base. A front door limiting wheel is provided on the rotating rod. The front door limiting wheel is provided with a front door limiting groove that engages with the upper end of the front door deadbolt rotating rod. The front door deadbolt spring is sleeved on the front door deadbolt push rod and one end abuts against the front door base. A retaining ring is fixedly installed on the middle part of the front door deadbolt push rod. The other end of the front door deadbolt spring abuts against the retaining ring and drives the front door deadbolt push rod to move towards the front door side of the high-pressure chamber.
[0012] Furthermore, the rear door interlocking assembly includes a rear door base, a rear door tension spring, a telescopic rod, a gravity block, a rear door top block, and a rear door deadbolt. The rear door base is fixedly mounted on the cabinet body, the telescopic rod is slidably mounted on the rear door base, and an anti-rotation slider is fixedly mounted on one end of the telescopic rod. The rear door base is provided with an anti-rotation sliding hole that cooperates with the anti-rotation slider. The end of the anti-rotation slider cooperates with the end of the rear door top block. The rear door top block is fixedly mounted on the high-pressure chamber rear door of the cabinet body. The gravity block is hinged to the anti-rotation slider. The rear door top block is provided with an anti-slip groove that cooperates with the gravity block. A lifting block that cooperates with the gravity block is fixedly mounted on the lower part of the rear door base. The telescopic rod is connected to one end of the rotating rod through the rear door deadbolt. One end of the rear door tension spring is connected to the rear door deadbolt. The other end of the rear door tension spring is connected to the rear door base and drives the anti-rotation slider to move towards the rear door top block.
[0013] Furthermore, the rear door deadbolt component includes a rear door limiting seat, a limiting sleeve, a connecting plate, and a limiting slider. One end of the connecting plate is fixedly connected to the telescopic rod, and the rear door tension spring is connected to the connecting plate. The limiting slider is fixedly installed on the other end of the connecting plate, and the end of the connecting plate is slidably installed in the rear door limiting seat. The rear door limiting seat is fixedly installed on the cabinet. The rotating rod is rotatably installed on the rear door limiting seat, and the limiting sleeve is fixedly installed on its end. The limiting sleeve is provided with a limiting groove that cooperates with the limiting slider.
[0014] Furthermore, a connecting shaft is fixedly provided on the interlocking turntable, a limiting rod is rotatably provided on the connecting shaft, a first through hole is provided on the interlocking base to cooperate with the middle part of the limiting rod, and the end of the limiting rod cooperates with the second through hole on the three-position switch slider.
[0015] The beneficial effects of this invention are:
[0016] 1) In this technology, the interlocking base, interlocking knob, interlocking turntable, three-position switch limit assembly, circuit breaker limit assembly, power transmission assembly, front door interlocking assembly and rear door interlocking assembly are used in combination to connect the front door of the high-voltage compartment of the gas-filled cabinet, the rear door of the high-voltage compartment, the circuit breaker and the three-position switch together, ensuring that the main circuit is always in a grounded state when the front door and the rear door of the high-voltage compartment are opened, which can better protect the safety of operators during worker maintenance.
[0017] 2) In this technology, the interlocking turntable can only return from the maintenance position to the working position after the front door interlocking component and the rear door interlocking component in the gas-filled switchgear are closed, ensuring that the front door and the rear door of the high-voltage compartment are both closed when the switchgear is in operation.
[0018] 3) In this technology, by using the connection of the fixed shaft, the limit plug and the three-position switch slider group in combination, it is effectively ensured that the three-position switch is always grounded and not turned off when in the maintenance position. Attached Figure Description
[0019] Figure 1 This is a diagram showing the connection between the circuit breaker and the three-position switch in the gas-insulated switch cabinet.
[0020] Figure 2 This is a three-dimensional connection structure diagram of the interlocking device;
[0021] Figure 3 Connection structure diagram of the interlocking turntable when in working position;
[0022] Figure 4 A three-dimensional connection structure diagram of the front door interlock assembly when in the working position;
[0023] Figure 5 A three-dimensional connection structure diagram of the rear door interlock assembly when in the working position;
[0024] Figure 6 A three-dimensional connection structure diagram of the rear door deadbolt component when in the working position;
[0025] Figure 7 This is a connection structure diagram of the interlocking turntable in the maintenance position;
[0026] Figure 8 This is a three-dimensional connection structure diagram of the front door interlock assembly when in the maintenance position;
[0027] Figure 9 This is a three-dimensional connection structure diagram of the rear door interlock assembly when in the maintenance position;
[0028] Figure 10 This is a three-dimensional connection structure diagram of the rear door deadbolt component when in the maintenance position;
[0029] Figure 11 This is a diagram showing the working structure between the limit switch rod and the slider of the three-position switch when in the maintenance position.
[0030] Figure 12 This is a diagram showing the mating structure between the second drive lever and the disconnect button.
[0031] Figure 13 This is a diagram showing the connection structure of the interlocking device on the cabinet.
[0032] In the diagram, 1-cabinet, 2-interlocking base, 3-interlocking knob, 4-interlocking turntable, 5-three-position switch cam, 6-locking pin, 7-first spring, 8-first drive rod, 9-friction reduction wheel, 10-limiting socket, 11-boss, 12-eccentric arc plate, 13-second spring, 14-second drive rod, 15-bearing ring, 16-limit switch, 17-eccentric semi-ring, 18-horizontal pull rod, 19-vertical pull rod, 20-rotating rod, 21-first adjusting terminal, 22-second adjusting terminal, 23-first swing rod, 24-swing shaft, 25-transmission seat, 26-second swing rod, 27-third adjusting terminal, 28-fourth adjusting terminal, 29-third swing rod, 30-front door base, 31-front door tension spring, 32-front door push wheel, 3 3-Front door push rod, 34-Front door locking rod, 35-Front door locking groove, 36-Front door deadbolt push rod, 37-Front door deadbolt rotating rod, 38-Front door deadbolt push spring, 39-Front door limit wheel, 40-Front door limit groove, 41-Snap ring, 42-Rear door base, 43-Rear door tension spring, 44-Telescopic rod, 45-Gravity block, 46-Rear door top block, 47-Anti-rotation slider, 48-Anti-rotation sliding hole, 49-Anti-slip groove, 50-Lifting block, 51-Rear door limit seat, 52-Limit sleeve, 53-Connecting plate, 54-Limit slider, 55-Limit sliding groove, 56-Connecting fixed shaft, 57-Limit insertion rod, 58-First through hole, 59-Three-position switch slider, 60-Second through hole, 61-High-pressure chamber front door, 62-High-pressure chamber rear door, 63-Disconnect button. Detailed Implementation
[0033] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0034] See Figures 2-13 The present invention provides a technical solution:
[0035] The five-proof interlocking device for the high-voltage compartment door of the gas-insulated switchgear includes an interlocking base 2, an interlocking knob 3, an interlocking turntable 4, a three-position switch limit assembly, a circuit breaker limit assembly, a power transmission assembly, a front door interlocking assembly, and a rear door interlocking assembly. The interlocking base 2 is fixedly mounted on the cabinet body 1. The interlocking knob 3 is rotatably mounted on the interlocking base 2. The interlocking turntable 4 is fixedly mounted on the interlocking knob 3. One end of the power transmission assembly is hinged to the edge of the interlocking turntable 4. The front door interlocking assembly and the rear door interlocking assembly are both connected to the other end of the power transmission assembly. The three-position switch limit assembly is mounted on the interlocking base 2 and cooperates with the interlocking turntable 4. The circuit breaker limit assembly is mounted on the cabinet body 1 and cooperates with the interlocking knob 3. Cabinet 1 is used to install structures such as interlocking base 2, power transmission components, front door interlocking components, and rear door interlocking components. Interlocking base 2 is fixed to cabinet 1 to install interlocking knob 3 and three-position switch limit components. Interlocking knob 3 is a manually operated handle. Interlocking knob 3 drives interlocking turntable 4 to rotate. When interlocking turntable 4 rotates, it has two stopping positions: one is the working position and the other is the maintenance position. When the interlocking rotary table 4 is in the working position, the three-position switch is closed to achieve high-voltage power transmission, the circuit breaker is in the closed position, and the front door 61 and rear door 62 of the high-voltage compartment on cabinet 1 are in the closed state. At this time, the three-position switch limit assembly fixes the interlocking rotary table 4 on the interlocking base 2 and prevents it from rotating. The front door 61 and rear door 62 of the high-voltage compartment cannot be opened under the action of the front door interlocking assembly and the rear door interlocking assembly, respectively. When the interlocking rotary table 4 is in the maintenance position, the three-position switch is closed and grounded. At the same time, the circuit breaker limit assembly controls the circuit breaker to be in the closed position to maintain conductivity. The front door 61 and rear door 62 of the high-voltage compartment are in the open state. At this time, under the action of the front door interlocking assembly and the rear door interlocking assembly, the interlocking rotary table 4 is controlled in reverse to prevent it from rotating. The function of the power transmission assembly is to transmit the power on the interlocking rotary table 4 to the front door interlocking assembly and the rear door interlocking assembly. At the same time, the front door interlocking assembly and the rear door interlocking assembly control the operation of the interlocking rotary table 4 through the power transmission assembly.
[0036] In some embodiments, the three-position switch limiting assembly includes a three-position switch cam 5, a locking pin 6, a first spring 7, and a first drive rod 8. The locking pin 6 is slidably disposed on the interlocking base 2, and one end of the locking pin 6 is hinged to one end of the first drive rod 8. The middle part of the first drive rod 8 is hinged to the interlocking base 2. A friction-reducing wheel 9 is provided on the other end of the first drive rod 8. The outer wall of the friction-reducing wheel 9 cooperates with the outer wall of the three-position switch cam 5. The interlocking turntable 4 is provided with a limiting insertion hole 10 that cooperates with the other end of the locking pin 6. The first spring 7 is sleeved on the locking pin 6, and one end abuts against the interlocking base 2. The other end of the first spring 7 abuts against the boss 11 and drives the locking pin 6 to be inserted into the limiting insertion hole 10. The boss 11 is fixedly disposed on the middle part of the locking pin 6. Among them, the three-position switch cam 5 is fixed to the three-position switch. Only when the three-position switch is grounded will the three-position switch cam 5 on the three-position switch contact with the friction-reducing wheel 9. The friction-reducing wheel 9 is rotatably set on the end of the first drive rod 8. This makes the three-position switch cam 5 and the friction-reducing wheel 9 roll friction after contact, reducing the wear between the three-position switch cam 5 and the friction-reducing wheel 9. The three-position switch cam 5 presses the end of the first drive rod 8 through the friction-reducing wheel 9. The first drive rod 8 rotates around the hinge in the middle of the first drive rod 8. The other end of the first drive rod 8 pulls the locking pin 6 out of the limit socket 10. After the locking pin 6 is separated from the interlocking turntable 4, it drives the interlocking turntable 4 to rotate through the interlocking knob 3. When the three-position switch is in the blank position or during high-voltage power transmission, the cam 5 of the three-position switch will not contact the friction-reducing wheel 9. With the cooperation of the boss 11 and the first spring 7, the locking pin 6 can be inserted into the limit socket 10 on the interlocking turntable 4. This effectively prevents the interlocking turntable 4 from rotating. That is, when the interlocking turntable 4 is in the working position, the locking pin 6 is inserted into the interlocking turntable 4; when it is in the maintenance position, the locking pin 6 is separated from the interlocking turntable 4. Two sets of vertical plates are provided on the interlocking base 2 to install the locking pin 6. Both sets of vertical plates are provided with through holes that cooperate with the locking pin 6, and the locking pin 6 slides in the two through holes. The first spring 7 is located between the two sets of vertical plates. Under the action of the two sets of vertical plates, the locking pin 6 is effectively prevented from bending and deforming, and the vertical plates are also prevented from deforming.
[0037] In some embodiments, the circuit breaker limiting assembly includes an eccentric arc plate 12, a second spring 13, and a second drive rod 14. The eccentric arc plate 12 is fixedly mounted on the interlocking turntable 4 and is not coaxially mounted with the interlocking knob 3. The outer wall of the eccentric arc plate 12 engages with the upper end of the second drive rod 14. The second drive rod 14 is slidably mounted on the cabinet 1. The second spring 13 is sleeved on the second drive rod 14 and its lower end rests against the cabinet 1. A bearing ring 15 is fixedly mounted on the middle part of the second drive rod 14. The upper end of the second spring 13 rests against the bearing ring 15 and drives the second drive rod 14 to move toward the eccentric arc plate 12. The lower end of the second drive rod 14 engages with the circuit breaker switch button on the cabinet 1. The circuit breaker is equipped with a disconnect button 63. When the disconnect button 63 is pressed, the circuit breaker will disconnect and cannot conduct electricity. However, in the maintenance position, the circuit breaker needs to be in the closed state because the circuit breaker is electrically connected to the three-position switch, and the three-position switch is grounded. Therefore, in the maintenance position, the end of the second drive rod 14 needs to be inserted into the disconnect button 63 to prevent the disconnect button 63 from being pressed. In the working position, the second drive rod 14 and the disconnect button 63 need to be separated. When the circuit breaker needs to be disconnected, the disconnect button 63 can be pressed immediately. Therefore, the second spring 13 and the bearing ring 15 make the second drive rod 14 always move upward, ensuring that the outer wall of the eccentric arc plate 12 is always in contact with the upper end of the second drive rod 14. The interlocking knob 3 drives the interlocking turntable 4 to rotate, and the interlocking turntable 4 drives the eccentric arc plate 12 to rotate. The eccentric arc plate 12 can also be replaced by a cam. In this way, the disconnect button 63 can be controlled by rotating the interlocking knob 3.
[0038] In some embodiments, a limit switch 16 is fixedly installed on the cabinet 1, and an eccentric semi-ring 17 that cooperates with the limit switch 16 is installed on the interlocking turntable 4. The eccentric semi-ring 17 is not coaxially arranged with the interlocking knob 3. The limit switch 16 is existing technology. When the interlocking turntable 4 is in the working position, the eccentric semi-ring 17 does not contact the limit switch 16. When the interlocking turntable 4 is in the maintenance position, the eccentric semi-ring 17 is in full contact with the limit switch 16. The limit switch 16 enables electrical signal monitoring, further ensuring safety during maintenance.
[0039] In some embodiments, the power transmission assembly includes a horizontal tie rod 18, a vertical tie rod 19, and a rotating rod 20. One end of the horizontal tie rod 18 is hinged to the interlocking turntable 4 via a first adjusting terminal 21, and the other end of the horizontal tie rod 18 is hinged to a first swing rod 23 via a second adjusting terminal 22. The first swing rod 23 is fixedly mounted on a swing shaft 24, and the swing shaft 24 is rotatably mounted on a transmission seat 25. The transmission seat 25 is fixedly mounted on the cabinet 1. A second swing rod 26 is fixedly mounted on the swing shaft 24. The upper end of the vertical tie rod 19 is hinged to the second swing rod 26 via a third adjusting terminal 27, and the lower end of the vertical tie rod 19 is hinged to the third swing rod 29 via a fourth adjusting terminal 28. The third swing rod 29 is fixedly mounted on the middle part of the rotating rod 20. The front door interlock assembly and the rear door interlock assembly are respectively connected to the two ends of the rotating rod 20. The first adjusting terminal 21 and the second adjusting terminal 22 are both threadedly connected to the horizontal tie rod 18, allowing adjustment of the distance between them. The third adjusting terminal 27 and the fourth adjusting terminal 28 are both threadedly connected to the vertical tie rod 19, allowing adjustment of the distance between them. All four adjusting terminals (21, 22, 27, and 28) are U-shaped. The first and second adjusting terminals 21 and 22 are aligned with the horizontal tie rod 18, and the third and fourth adjusting terminals 27 and 28 are aligned with the vertical tie rod 19. The transmission base 25 is used to install the swing shaft 24, which in turn is used to install the first swing rod 23 and the second swing rod 26. The first swing rod 23, the second swing rod 26, and the swing shaft 24 work together to change the direction of force transmission. When the interlocking turntable 4 rotates, it drives the horizontal tie rod 18 to move laterally via the first adjusting terminal 21. The horizontal tie rod 18 drives the swing shaft 24 to rotate via the second adjusting terminal 22 and the first swing rod 23. The swing shaft 24 drives the vertical tie rod 19 to move vertically via the second swing rod 26 and the third adjusting terminal 27. The vertical tie rod 19 drives the rotating rod 20 to rotate via the fourth adjusting terminal 28 and the third swing rod 29. The rotating rod 20 is rotatably mounted on the cabinet 1. The rotating rod 20 can only rotate after the front door 61 and the rear door 62 of the high-voltage chamber are closed. At this time, the interlocking turntable 4 can return from the maintenance position to the working position.
[0040] In some embodiments, the front door interlocking assembly includes a front door base 30, a front door tension spring 31, a front door push wheel 32, a front door push rod 33, and a front door locking rod 34. The front door base 30 is fixedly mounted on the cabinet 1, the front door push rod 33 is slidably mounted on the front door base 30, the upper end of the front door push rod 33 cooperates with the front door push wheel 32 fixed on the rotating rod 20, the lower end of the front door push rod 33 cooperates with one end of the front door locking rod 34, the middle part of the front door locking rod 34 is hinged on the front door base 30, and the other end of the front door locking rod 34 is provided with a front door locking groove 35 that cooperates with the front door 61 of the high-pressure chamber. The lower end of the front door tension spring 31 is connected to the front door push rod 33, and the upper end of the front door tension spring 31 is connected to the front door base 30. The front door base 30 is used to install the front door push rod 33 and the front door locking rod 34. Two screws are vertically mounted on the front door base 30. The front door push rod 33 has two sliding grooves that respectively mate with the two screws. When the interlocking turntable 4 rotates from the working position to the maintenance position, it drives the rotating rod 20 to rotate. The rotating rod 20 drives the front door push wheel 32 to rotate. The front door push wheel 32 is a cam. The front door push wheel 32 pushes the front door push rod 33 downwards, and the front door... The lower end of the rod 33 is hinged to the front door locking rod 34, and the middle part of the front door locking rod 34 is rotatably mounted on the front door base 30. Therefore, the other end of the front door locking rod 34 is lifted upward, and the front door locking groove 35 on the front door locking rod 34 is separated from the high-pressure chamber front door 61. At this time, the high-pressure chamber front door 61 can be opened. The function of the front door tension spring 31 is to pull the front door push rod 33 to the side of the rotating rod 20, so that the upper end of the front door push rod 33 is always pressed against the front door push wheel 32.
[0041] In some embodiments, a front door deadbolt component is fixedly mounted on the front door base 30. The front door deadbolt component includes a front door deadbolt push rod 36, a front door deadbolt rotating rod 37, and a front door deadbolt spring 38. The front door deadbolt push rod 36 is slidably mounted on the front door base 30, with one end engaging with the high-pressure chamber front door 61. The other end of the front door deadbolt push rod 36 is hinged to the lower end of the front door deadbolt rotating rod 37, and the middle part of the front door deadbolt rotating rod 37 is hinged to the front door base 30. The rotating rod 20 is equipped with a front door limiting wheel 39, and the front door limiting wheel 39 is equipped with a front door limiting groove 40 that mates with the upper end of the front door deadbolt 37. The front door deadbolt push spring 38 is sleeved on the front door deadbolt push rod 36, with one end abutting against the front door base 30. A retaining ring 41 is fixedly installed on the middle part of the front door deadbolt push rod 36, and the other end of the front door deadbolt push spring 38 abuts against the retaining ring 41 and drives the front door deadbolt push rod 36 to move towards the front door side of the high-pressure chamber. The function of the front door deadbolt component is to prevent the rotating rod 20 from rotating when the front door 61 of the high-pressure chamber is not closed, thereby controlling the interlocking turntable 4 to not rotate, and the operator will not be able to turn the interlocking knob 3 at this time. When the maintenance turntable is in operation, the front door deadbolt 37 is abutting against the front door limiting groove 40 on the front door limiting wheel 39, and the front door limiting wheel 39 is fixedly connected to the rotating rod 20, so the rotating rod 20 cannot rotate at this time. When the front door 61 of the high-pressure chamber is closed, it presses against the end of the front door deadbolt 36. The other end of the front door deadbolt 36 moves the lower end of the front door deadbolt 37, while the middle part of the front door deadbolt 37 is rotatably mounted on the front door base 30. The front door deadbolt 37 separates from the front door limiting groove 40, at which point the rotating rod 20 can be controlled to rotate. When the front door deadbolt spring 38 works in conjunction with the retaining ring 41, it moves the front door deadbolt 36 toward the front door 61. When the front door 61 is opened, the front door deadbolt 36 moves immediately, causing the upper end of the front door deadbolt 37 to press against the front door limiting groove 40 and preventing the rotating rod 20 from rotating. The rotating rod 20 can only be controlled to rotate after the front door 61 of the high-pressure chamber is closed. After the rotating rod 20 rotates, it drives the front door push wheel 32 to rotate. The front door push wheel 32 fixes the front door 61 of the high-pressure chamber through the front door push rod 33 and the front door locking rod 34.
[0042] In some embodiments, the rear door interlock assembly includes a rear door base 42, a rear door tension spring 43, a telescopic rod 44, a gravity block 45, a rear door top block 46, and a rear door deadbolt. The rear door base 42 is fixedly mounted on the cabinet 1, and the telescopic rod 44 is slidably mounted on the rear door base 42. An anti-rotation slider 47 is fixedly mounted on one end of the telescopic rod 44. The rear door base 42 is provided with an anti-rotation sliding hole 48 that cooperates with the anti-rotation slider 47. The end of the anti-rotation slider 47 cooperates with the end of the rear door top block 46, and the rear door top block 46 is fixedly mounted on the cabinet 1. On the rear door 62 of the high-pressure chamber of cabinet 1, a gravity block 45 is hinged to the anti-rotation slider 47. The rear door top block 46 is provided with an anti-slip groove 49 that cooperates with the gravity block 45. A lifting block 50 that cooperates with the gravity block 45 is fixedly provided on the lower part of the rear door base 42. The telescopic rod 44 is connected to one end of the rotating rod 20 through the rear door anti-lock component. One end of the rear door tension spring 43 is connected to the rear door anti-lock component. The other end of the rear door tension spring 43 is connected to the rear door base 42 and drives the anti-rotation slider 47 to move towards the rear door top block 46. The rear door base 42 is fixed to the cabinet 1 to install the telescopic rod 44 and the rear door tension spring 43. When the interlocking turntable 4 rotates from the working position to the maintenance position, the rotating rod 20 also rotates. The connecting plate 53 in the rear door anti-lock component moves towards the high-pressure chamber rear door 62 under the action of the rear door tension spring 43. Simultaneously, the telescopic rod 44 moves towards the rear door top block 46 until its end abuts against the rear door base 42. At this time, the anti-rotation slider 47 also moves towards the rear door top block 46. The gravity block 45 on the rear door top block 46 rotates downwards under gravity, and its end separates from the anti-slip groove 49 on the rear door top block 46. The rear door top block 46 is fixedly connected to the high-pressure chamber rear door 62. When the gravity block 45 separates from the rear door top block 46, the high-pressure chamber rear door 62 can be opened. In the maintenance position, the rotating rod 20 cannot rotate under the action of the rear door anti-lock component. When the high-voltage chamber rear door 62 is closed, the rear door top block 46 pushes the end of the anti-rotation slider 47 to move, causing the rear door tension spring 43 to stretch. At this time, the gravity locking block 45 rotates upward under the action of the lifting block 50. When the gravity locking block 45 is locked in the anti-slip groove 49, the high-voltage chamber rear door 62 can be locked. The function of the rear door anti-locking component is that when it is in the working position, the telescopic rod 44 cannot move and ensures that the high-voltage chamber rear door 62 is in the closed state. When it is in the maintenance position, the high-voltage chamber rear door 62 is in the open state and ensures that the rotating rod 20 cannot rotate.
[0043] In some embodiments, the rear door deadbolt component includes a rear door limiting seat 51, a limiting sleeve 52, a connecting plate 53, and a limiting slider 54. One end of the connecting plate 53 is fixedly connected to the telescopic rod 44, and the rear door tension spring 43 is connected to the connecting plate 53. The limiting slider 54 is fixedly provided on the other end of the connecting plate 53, and the end of the connecting plate 53 is slidably disposed within the rear door limiting seat 51. The rear door limiting seat 51 is fixedly disposed on the cabinet 1. The rotating rod 20 is rotatably disposed on the rear door limiting seat 51, and the end of the rotating rod 20 is fixedly provided with a limiting sleeve 52. The limiting sleeve 52 is provided with a limiting groove 55 that cooperates with the limiting slider 54. The rear door limiting seat 51 is used to install the connecting plate 53 and the end of the rotating rod 20. When in the working position, the end of the limiting slider 54 rests against the end of the limiting sleeve 52. At this time, the rear door tension spring 43 cannot pull the limiting slider 54 out of the rear door limiting seat 51, and the high-voltage chamber rear door 62 cannot be opened. When in the maintenance position, after the rotating rod 20 drives the limiting sleeve 52 to rotate together, the limiting groove 55 on the limiting sleeve 52 fits perfectly with the limiting slider 54. At this time, the rear door tension spring 43 can pull the limiting slider 54 out of the rear door limiting seat 51, and the high-voltage chamber rear door 62 can be opened. Since the limiting slider 54 is stuck in the limiting groove 55, the limiting slider 54 jams the limiting sleeve 52 when the high-voltage chamber rear door 62 is not closed. Since the limiting sleeve 52 is fixedly connected to the rotating rod 20, the rotating rod 20 is restricted from rotating.
[0044] In some embodiments, a connecting shaft 56 is fixedly mounted on the interlocking turntable 4, and a limiting rod 57 is rotatably mounted on the connecting shaft 56. A first through hole 58 that mates with the middle of the limiting rod 57 is provided on the interlocking base 2, and the end of the limiting rod 57 mates with a second through hole 60 on the three-position switch slider 59. When the interlocking turntable 4 is in the maintenance position, it cannot rotate, the front door 61 and rear door 62 of the high-voltage compartment cannot be closed, and the circuit breaker is in the closed state. If the three-position switch is disconnected from the ground and then closed in the high-voltage transmission line, this could easily cause a safety accident. Therefore, a false closing structure is formed by the connecting shaft 56, the limiting rod 57, and the three-position switch slider 59. The function of the false closing structure is to ensure that the three-position switch remains grounded and does not disconnect when the interlocking turntable 4 is in the maintenance state. The three-position switch slider 59 is mounted on the three-position switch and moves up and down on the cabinet 1. In the working position, the end of the limit rod 57 passes through the first through hole 58 and rests on the side of the three-position switch slider 59. At this time, the interlocking knob 3 cannot be rotated manually. In the maintenance position, the three-position switch is grounded, the three-position switch slider 59 moves downward and the second through hole 60 on the three-position switch slider 59 engages with the limit rod 57. During the process of the interlocking turntable 4 rotating from the working position to the maintenance position, the limit rod 57 also passes through the first through hole 58 and inserts into the second through hole 60. When the three-position switch is separated from the ground, the three-position switch slider 59 will move upward. Under the action of the limit rod 57, the three-position switch slider 59 cannot move, thus keeping the three-position switch grounded. Only when the interlocking turntable 4 rotates from the maintenance position to the working position can the three-position switch be separated from the ground.
[0045] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "one end", "top", "middle", "other end", "coaxial", "one side", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.
[0046] In this invention, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "fix", "hinged", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0047] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.
Claims
1. A five-proof interlocking device for the high-voltage chamber door of a gas-filled switchgear, characterized in that: The system includes an interlocking base, an interlocking knob, an interlocking turntable, a three-position switch limit assembly, a circuit breaker limit assembly, a power transmission assembly, a front door interlocking assembly, and a rear door interlocking assembly. The interlocking base is fixedly mounted on the cabinet body. The interlocking knob is rotatably mounted on the interlocking base. The interlocking turntable is fixedly mounted on the interlocking knob. One end of the power transmission assembly is hinged to the edge of the interlocking turntable. The front door interlocking assembly and the rear door interlocking assembly are both connected to the other end of the power transmission assembly. The three-position switch limit assembly is mounted on the interlocking base and cooperates with the interlocking turntable. The circuit breaker limit assembly is mounted on the cabinet body and cooperates with the interlocking knob. The three-position switch limiting assembly includes a three-position switch cam, a locking pin, a first spring, and a first drive rod. The locking pin is slidably disposed on the interlocking base, and one end of the locking pin is hinged to one end of the first drive rod. The middle part of the first drive rod is hinged to the interlocking base. A friction-reducing wheel is disposed on the other end of the first drive rod. The outer wall of the friction-reducing wheel cooperates with the outer wall of the three-position switch cam. The interlocking turntable is provided with a limiting hole that cooperates with the other end of the locking pin. The first spring is sleeved on the locking pin, and one end of the spring abuts against the interlocking base. The other end of the spring abuts against the boss and drives the locking pin to be inserted into the limiting hole. The boss is fixedly disposed on the middle part of the locking pin. The power transmission assembly includes a horizontal tie rod, a vertical tie rod, and a rotating rod. One end of the horizontal tie rod is hinged to the interlocking turntable via a first adjusting terminal, and the other end of the horizontal tie rod is hinged to a first swing rod via a second adjusting terminal. The first swing rod is fixedly mounted on a swing shaft, and the swing shaft is rotatably mounted on a transmission seat. The transmission seat is fixedly mounted on the cabinet. A second swing rod is fixedly mounted on the swing shaft. The upper end of the vertical tie rod is hinged to the second swing rod via a third adjusting terminal, and the lower end of the vertical tie rod is hinged to the third swing rod via a fourth adjusting terminal. The third swing rod is fixedly mounted on the middle part of the rotating rod. The front door interlock assembly and the rear door interlock assembly are respectively connected to the two ends of the rotating rod. The front door interlock assembly includes a front door base, a front door tension spring, a front door push wheel, a front door push rod, and a front door locking rod. The front door base is fixedly mounted on the cabinet body. The front door push rod is slidably mounted on the front door base. The upper end of the front door push rod engages with the front door push wheel fixed on the rotating rod. The lower end of the front door push rod engages with one end of the front door locking rod. The middle part of the front door locking rod is hinged to the front door base. The other end of the front door locking rod is provided with a front door locking groove that engages with the front door of the high-pressure chamber. The lower end of the front door tension spring is connected to the front door push rod, and the upper end of the front door tension spring is connected to the front door base.
2. The five-proof interlocking device for the high-voltage chamber door of the gas-filled switchgear according to claim 1, characterized in that: The circuit breaker limiting assembly includes an eccentric arc plate, a second spring, and a second drive rod. The eccentric arc plate is fixedly mounted on the interlocking turntable and is not coaxially mounted with the interlocking knob. The outer wall of the eccentric arc plate engages with the upper end of the second drive rod. The second drive rod is slidably mounted on the cabinet. The second spring is sleeved on the second drive rod and its lower end abuts against the cabinet. A bearing ring is fixedly mounted on the middle part of the second drive rod. The upper end of the second spring abuts against the bearing ring and drives the second drive rod to move towards the eccentric arc plate. The lower end of the second drive rod engages with the circuit breaker switch button on the cabinet.
3. The five-proof interlocking device for the high pressure chamber door of the surge tank according to claim 1 or 2, characterized in that: A limit switch is fixedly installed on the cabinet, and an eccentric semi-ring is provided on the interlocking turntable to cooperate with the limit switch. The eccentric semi-ring is not coaxial with the interlocking knob.
4. The five-proof interlocking device for the high pressure chamber door of the surge tank according to claim 1 or 2, characterized in that: A front door deadbolt assembly is fixedly installed on the front door base. The front door deadbolt assembly includes a front door deadbolt push rod, a front door deadbolt rotating rod, and a front door deadbolt spring. The front door deadbolt push rod is slidably mounted on the front door base, with one end engaging with the front door of the high-pressure chamber. The other end of the front door deadbolt push rod is hinged to the lower end of the front door deadbolt rotating rod. The middle part of the front door deadbolt rotating rod is hinged to the front door base. A front door limiting wheel is provided on the rotating rod, and a front door limiting groove is provided on the front door limiting wheel to engage with the upper end of the front door deadbolt rotating rod. The front door deadbolt spring is sleeved on the front door deadbolt push rod, with one end pressing against the front door base. A retaining ring is fixedly installed on the middle part of the front door deadbolt push rod, and the other end of the front door deadbolt spring presses against the retaining ring and drives the front door deadbolt push rod to move towards the front door of the high-pressure chamber.
5. The five-proof interlocking device for the high pressure chamber door of the surge tank according to claim 1 or 2, characterized in that: The rear door interlocking assembly includes a rear door base, a rear door tension spring, a telescopic rod, a gravity latch, a rear door top block, and a rear door deadbolt. The rear door base is fixedly mounted on the cabinet body. The telescopic rod is slidably mounted on the rear door base. An anti-rotation slider is fixedly mounted on one end of the telescopic rod. The rear door base has an anti-rotation sliding hole that mates with the anti-rotation slider. The end of the anti-rotation slider mates with the end of the rear door top block. The rear door top block is fixedly mounted on the high-pressure compartment rear door of the cabinet body. The gravity latch is hinged to the anti-rotation slider. The rear door top block has an anti-slip groove that mates with the gravity latch. A lifting block that mates with the gravity latch is fixedly mounted on the lower part of the rear door base. The telescopic rod is connected to one end of the rotating rod through the rear door deadbolt. One end of the rear door tension spring is connected to the rear door deadbolt. The other end of the rear door tension spring is connected to the rear door base and drives the anti-rotation slider to move towards the rear door top block.
6. The five-proof interlocking device for the high pressure chamber door of the surge tank according to claim 5, characterized in that: The rear door deadbolt component includes a rear door limiting seat, a limiting sleeve, a connecting plate, and a limiting slider. One end of the connecting plate is fixedly connected to the telescopic rod, and the rear door tension spring is connected to the connecting plate. The limiting slider is fixedly installed on the other end of the connecting plate, and the end of the connecting plate is slidably installed in the rear door limiting seat. The rear door limiting seat is fixedly installed on the cabinet. The rotating rod is rotatably installed on the rear door limiting seat, and the limiting sleeve is fixedly installed on its end. The limiting sleeve is provided with a limiting groove that cooperates with the limiting slider.
7. The five-proof interlocking device for the high pressure chamber door of the surge tank according to claim 1 or 2, characterized in that: A connecting shaft is fixedly installed on the interlocking turntable, and a limit rod is rotatably installed on the connecting shaft. A first through hole that mates with the middle of the limit rod is provided on the interlocking base, and the end of the limit rod mates with a second through hole on the three-position switch slider.