A high-voltage switch cabinet grounding switch locking system and locking control method

Abstract

The present invention relates to the technical field of power equipment, and specifically to a high-voltage switchgear grounding switch locking system and a locking control method. The system includes a switchgear, a switching module and a locking module. The switchgear includes a cabinet body, and a busbar room, a circuit breaker room and a cable room inside the cabinet body. The cabinet body is provided with a rear door on the rear cabinet wall. The switching module includes a grounding unit. The grounding operating panel drives the grounding operating shaft to move forward and backward by rotation, and drives the grounding switch to close or open. The locking module includes a locking rod, a grounding pull rod, a linear motion conversion mechanism and a locking plate. The locking rod is slidingly arranged along the width direction of the rear door. The grounding pull rod is rotationally connected to the grounding operating shaft and is connected to the locking rod through a linear motion conversion mechanism. The locking plate is arranged on the rear door, and the locking rod is docked or separated with the locking plate by linear displacement. By providing a new form of mechanical mandatory locking, the present invention does not worry about locking failure due to electrical circuit failure, and is safer and more reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of power equipment, and in particular to a high-voltage switch cabinet grounding switch locking system and a locking control method. Background Art

[0002] Fixed switchgear features fixed mounting of all electrical components. This type of switchgear boasts a simple structure and operation, wide internal insulation distances, ample maintenance space, and a relatively low price, making it a popular choice. Initial designs for fixed switchgear lacked grounding switches in the outlet cabinet, requiring maintenance to be performed using hanging wiring. Currently, when using this type of switchgear, design institutes and owners often request the addition of a grounding switch. However, while most switchgear manufacturers incorporate a grounding switch, they fail to incorporate a mechanical interlock between the switch and the rear door. Even when a interlock is installed, it typically uses a traditional electrical interlock.

[0003] Traditional electrical locking involves installing an electromagnetic lock on the rear door of the switchgear. A sensor in the grounding switch determines whether the cable compartment is energized. If the cable compartment is energized, the electromagnetic lock locks the rear door. However, this locking method is prone to loose connections in the secondary wiring, which can lead to unreliable locking and even electrical component burnout, resulting in lock failure. This can cause safety incidents, endanger personal safety, cause major quality issues, and compromise reliable power supply. Summary of the Invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a high-voltage switch cabinet grounding switch locking system and a locking control method to solve the problem in the prior art that the fixed switch cabinet uses an electrical locking form between the grounding switch and the rear door, which is prone to unreliable locking due to a loose connection of the secondary wire.

[0005] The present invention discloses a high-voltage switch cabinet grounding switch locking system, comprising a switch cabinet, and an opening and closing module and a locking module arranged on the switch cabinet;

[0006] The switch cabinet includes a cabinet body, and a busbar room, a circuit breaker room and a cable room which are arranged in isolation within the cabinet body. The cabinet body is provided with a rear door corresponding to the cable room on the rear cabinet wall;

[0007] The opening and closing module includes a grounding unit, which includes a grounding switch arranged in the cable chamber, a grounding operating panel arranged on the front wall of the cabinet, and a grounding operating shaft arranged in the circuit breaker chamber, wherein the grounding operating shaft is perpendicular to the rear door, and the grounding operating panel is mechanically connected to the grounding switch via the grounding operating shaft. The grounding operating panel drives the grounding operating shaft to move forward and backward by rotating, thereby driving the grounding switch to close or open.

[0008] The locking module includes a locking rod, a grounding pull rod, a linear motion conversion mechanism and a lock plate. The locking rod is located above the rear door and is slidably arranged on the rear cabinet wall of the cabinet along the width direction of the rear door. One end of the grounding pull rod is rotatably connected to the grounding operating shaft, and the other end of the grounding pull rod is connected to one end of the locking rod through the linear motion conversion mechanism. The lock plate is arranged on the rear door, and the other end of the locking rod is docked with or separated from the lock plate by linear displacement.

[0009] Optionally, the locking rod includes a transverse rod slidably arranged on the rear wall of the cabinet body, and a longitudinal rod integrally formed at one end of the transverse rod, the other end of the transverse rod is connected to the linear motion conversion mechanism, a locking groove is provided on the lock plate, and the lock groove is located on one side of the lock plate to form a locking opening for the longitudinal rod to slide in or out in a horizontal direction.

[0010] Optionally, the locking module further comprises a crossbeam located above the rear door, the crossbeam being fitted and fixed to the rear cabinet wall of the cabinet, the top of the crossbeam being bent inwardly to form a horizontally arranged support top beam, the support top beam being provided with a guide plate, the guide plate being provided with a first guide hole for the transverse rod to pass through transversely, the bottom of the crossbeam being bent inwardly to form a horizontally arranged support bottom beam, the support top beam and the support bottom beam being respectively provided with a second guide hole for the longitudinal rod to pass through longitudinally;

[0011] The first guide hole and the transverse rod body are clearance-fitted, the second guide hole is an elongated hole structure, and the length direction of the second guide hole is consistent with the linear displacement direction of the transverse rod body.

[0012] Optionally, the linear motion conversion mechanism includes an arc-shaped crank arm and a first connecting plate located above the cross beam, the middle part of the arc-shaped crank arm is rotatably connected to the support top beam, one end of the arc-shaped crank arm is rotatably connected to the end of the grounding pull rod, the other end of the arc-shaped crank arm is rotatably connected to one end of the first connecting plate, and the end of the transverse rod body is rotatably connected to the other end of the first connecting plate, wherein the central angle of the arc-shaped crank arm is greater than or equal to 90°, and the notch of the arc-shaped crank arm faces the rear cabinet wall of the cabinet body.

[0013] Optionally, the linear motion conversion mechanism also includes a support plate, and the arc-shaped crank arm is connected to the support top beam through the support plate. The support plate includes a bottom plate, an intermediate plate and a top plate that are integrally formed in a "Z" shape. The bottom plate is horizontally arranged on the support top beam, and the intermediate plate extends obliquely upward in a direction away from the rear cabinet wall of the cabinet, and an avoidance gap is formed between the top plate and the rear cabinet wall of the cabinet, and the middle part of the arc-shaped crank arm is rotatably connected to the top plate.

[0014] Optionally, the cabinet includes an isolation plate, the cable chamber and the circuit breaker chamber are separated by the isolation plate, the grounding switch is arranged on the isolation plate, and the isolation plate is provided with a limiting hole for the grounding operating shaft to pass through;

[0015] The opening and closing module further includes a second connecting plate, the rotating shaft of the earthing switch is rotatably connected to one end of the second connecting plate, and the other end of the second connecting plate is rotatably connected to the end of the earthing operating shaft, so that when the earthing operating shaft moves backward, the contact blade of the earthing switch rotates upward and opens the circuit breaker;

[0016] One end of the grounding pull rod away from the arc-shaped crank arm is rotatably connected to the middle part of the second connecting plate, so that after the grounding operating shaft moves backward, the grounding pull rod drives the arc-shaped crank arm to rotate counterclockwise and locks the locking rod and the locking plate.

[0017] Optionally, the grounding switch is located in the cable room near the bottom of the cabinet, and the grounding rod includes an integrally formed first horizontal rod body, an intermediate rod body and a second horizontal rod body. The first horizontal rod body is flush with the arc-shaped elbow, and the grounding rod is connected to the arc-shaped elbow through the first horizontal rod body. The second horizontal rod body is flush with the second connecting plate, and the grounding rod is connected to the second connecting plate through the second horizontal rod body.

[0018] Optionally, a positioning groove is provided on the end of the first horizontal rod body, which is horizontally fitted with the surface of the arc-shaped elbow arm, and a "C"-shaped clamp is provided on the end of the second horizontal rod body. The second horizontal rod body is rotatably connected to the second connecting plate through the "C"-shaped clamp, and the "C"-shaped clamp and the second connecting plate are in a mating clamping arrangement.

[0019] Optionally, the opening and closing module further includes an upper isolation unit, a lower isolation unit and a load unit;

[0020] The upper isolation unit includes an upper isolating switch arranged in the busbar chamber, an upper isolating operating panel arranged on the front wall of the cabinet body, and an upper isolating operating shaft arranged in the circuit breaker chamber. The upper isolating operating panel is connected to the rotating shaft of the upper isolating switch via the upper isolating operating shaft, so that when the upper isolating operating panel rotates, the upper isolating operating shaft drives the upper isolating switch to close or open.

[0021] The lower isolation unit includes a lower isolation switch arranged in the cable room, a lower isolation operating panel arranged on the front wall of the cabinet body, and a lower isolation operating shaft arranged in the circuit breaker room. The lower isolation switch and the grounding switch are integrated. The lower isolation operating panel is connected to the rotating shaft of the lower isolation switch through the lower isolation operating shaft, so that when the lower isolation operating panel is rotated, the lower isolation operating shaft drives the lower isolation switch to close or open.

[0022] The load unit includes a vacuum interrupter arranged at the upper disconnector, a load operating panel arranged on the front wall of the cabinet body, and a load operating shaft arranged in the circuit breaker chamber. The load operating panel is connected to the rotating shaft of the vacuum interrupter through the load operating shaft, so that after the load operating panel rotates, the load operating shaft drives the vacuum interrupter to close or open.

[0023] The present invention also discloses a locking control method, which uses the above-mentioned high-voltage switch cabinet grounding switch locking system, and the locking control method includes:

[0024] Insert the operating handle into the grounding operating plate and pull it upward to drive the grounding operating shaft to move upward, thereby lifting the contact knife of the grounding switch to complete the tripping operation. The grounding pull rod moves upward synchronously, and the linear motion conversion mechanism drives the locking rod to move linearly until it docks with the lock plate to complete the locking operation.

[0025] The grounding operating plate is pulled downward by the operating handle to drive the grounding operating shaft to move downward, and the contact knife of the grounding switch is driven to rotate downward to complete the closing. The grounding pull rod moves downward synchronously, and the linear motion conversion mechanism drives the locking rod to move linearly until it is separated from the lock plate to complete the unlocking.

[0026] Compared with the prior art, the high-voltage switchgear grounding switch locking system and locking control method provided by the embodiments of the present invention have the following advantages:

[0027] By setting up the opening and closing module and the locking module, the locking action of the rear door of the high-voltage switch cabinet is mechanically interlocked with the opening and closing operation of the grounding switch. By utilizing the opening or closing operation of the grounding switch, the grounding operating shaft synchronously drives the grounding pull rod to perform linear displacement back and forth, and through the setting of the linear motion conversion mechanism, the front and back displacement of the grounding pull rod is converted into a linear displacement of the locking rod along the width direction of the rear inner wall of the cabinet, so that the locking rod is controlled by mechanical transmission to connect and separate with the lock plate on the rear door, thereby realizing the locking and unlocking of the rear door. Furthermore, by providing a new form of mechanical compulsory locking, there is no need to worry about locking failure due to failure of the electrical circuit, which is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0029] Figure 1 A schematic diagram of the overall structure of a grounding switch locking system for a high-voltage switchgear provided in an embodiment of the present invention;

[0030] Figure 2 A side view of a high-voltage switchgear grounding switch locking system provided by an embodiment of the present invention;

[0031] Figure 3 A schematic structural diagram of a locking module provided in an embodiment of the present invention;

[0032] Figure 4 for Figure 3 A magnified schematic diagram of the structure A in the middle;

[0033] Figure 5 for Figure 3 A magnified schematic diagram of structure B in the middle;

[0034] Figure 6 A schematic structural diagram of the assembly of the arc-shaped crank arm and the first connecting plate provided in an embodiment of the present invention;

[0035] Figure 7 for Figure 2 A magnified schematic diagram of the C structure in the middle.

[0036] The reference numerals in the figures are:

[0037] 1. Switchgear; 11. Busbar compartment; 12. Circuit breaker compartment; 13. Cable compartment; 14. Rear door; 2. Opening and closing module; 21. Earthing switch; 22. Earthing operating shaft; 23. Second connecting plate; 3. Locking module; 31. Locking rod; 311. Horizontal rod; 312. Longitudinal rod; 32. Earthing pull rod; 321. First horizontal rod; 322. Middle rod; 323. Second horizontal rod; 3231. "C" shaped clamp; 33. Linear motion conversion mechanism; 331, arc-shaped crank arm; 332, first connecting plate; 333, support plate; 3331, bottom plate; 3332, middle plate; 3333, top plate; 34, lock plate; 341, lock slot; 35, crossbeam; 351, second guide hole; 36, guide plate; 4, upper isolating switch; 41, upper isolating operating shaft; 5, lower isolating switch; 51, lower isolating operating shaft; 6, vacuum interrupter; 61, load operating shaft. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. Now, in conjunction with the accompanying drawings, the preferred embodiments of the present invention will be described in detail.

[0039] The present invention discloses a high voltage switch cabinet grounding switch locking system, such as Figure 1-Figure 5 As shown, it includes a switch cabinet 1, and a switching module 2 and a locking module 3 arranged on the switch cabinet 1;

[0040] The switch cabinet 1 includes a cabinet body, and a busbar chamber 11, a circuit breaker chamber 12, and a cable chamber 13 that are isolated and arranged inside the cabinet body. A rear door 14 corresponding to the cable chamber 13 is provided on the rear wall of the cabinet body.

[0041] The opening and closing module 2 includes a grounding unit, which includes a grounding switch 21 arranged in the cable chamber 13, a grounding operating panel arranged on the front wall of the cabinet, and a grounding operating shaft 22 arranged in the circuit breaker chamber 12. The grounding operating shaft 22 is perpendicular to the rear door 14. The grounding operating panel is mechanically connected to the grounding switch 21 through the grounding operating shaft 22. The grounding operating panel drives the grounding operating shaft 22 to move forward and backward by rotating, thereby driving the grounding switch 21 to close or open.

[0042] The locking module 3 includes a locking rod 31, a grounding pull rod 32, a linear motion conversion mechanism 33 and a locking plate 34. The locking rod 31 is located above the rear door 14 and is slidably set on the rear cabinet wall of the cabinet along the width direction of the rear door 14. One end of the grounding pull rod 32 is rotatably connected to the grounding operating shaft 22, and the other end of the grounding pull rod 32 is connected to one end of the locking rod 31 through the linear motion conversion mechanism 33. The locking plate 34 is set on the rear door 14, and the other end of the locking rod 31 is docked or separated with the lock plate 34 through linear displacement.

[0043] Through the implementation of the above-mentioned embodiment of the locking system of the grounding switch 21 of the high-voltage switch cabinet 1, the opening and closing module 2 and the locking module 3 are set to mechanically interlock the locking action of the rear door 14 of the high-voltage switch cabinet 1 with the opening and closing operation of the grounding switch 21. By utilizing the opening or closing operation of the grounding switch 21, the grounding operating shaft 22 synchronously drives the grounding pull rod 32 to move forward and backward in a straight line, and through the setting of the linear motion conversion mechanism 33, the forward and backward displacement of the grounding pull rod 32 is converted into a straight line displacement of the locking rod 31 along the width direction of the rear inner wall of the cabinet. Among them, the grounding operating shaft 22 is an operating shaft arranged obliquely, that is, the end of the grounding operating shaft 22 close to the grounding operating disk is lower than the end of the grounding operating shaft 22 close to the grounding pull rod 32. When the grounding operating disk is rotated upward, the grounding operating shaft 22 will move obliquely upward and drive the contact knife of the grounding switch 21 to rotate and lift upward to complete the opening. At the same time, the grounding operating shaft 22 drives the grounding pull rod 32 upward, causing it to move toward the front of the cabinet. This, in turn, drives the locking rod 31 linearly toward the lock plate 34 via the linear motion conversion mechanism 33, until the locking rod 31 and lock plate 34 mate and lock. Similarly, when the grounding operating dial is rotated downward, the grounding operating shaft 22 rotates downward, driving the contact blade of the grounding switch 21 downward to close the switch. At this point, the grounding operating shaft 22 drives the grounding pull rod 32 downward, causing it to move toward the rear of the cabinet. This, in turn, drives the locking rod 31 linearly away from the lock plate 34 via the linear motion conversion mechanism 33, until the locking rod 31 and lock plate 34 separate and unlock. Thus, by controlling the docking and separation of the locking rod 31 and the locking plate 34, the rear door 14 of the high-voltage switchgear 1 is locked and unlocked. Furthermore, by providing a new form of mechanical mandatory locking, there is no need to worry about locking failure due to electrical circuit failure, which is safer and more reliable. It not only meets the basic requirements of GB / T 3906 for switchgear, but also meets the reliability of power supply to users.

[0044] Preferably, the rear door 14 is a double-door structure, comprising a right lower door and a left lower door, with a lock plate 34 disposed on the left lower door. When the grounding switch 21 is closed, the right lower door is closed first, followed by the left lower door. At this point, the grounding switch 21 is switched off, and the locking rod 31 is controlled to mate with the lock plate 34, completing the locking. When the grounding switch 21 is switched off and then closed, the locking rod 31 is controlled to separate from the lock plate 34, completing the unlocking. At this point, the left lower door is opened first, followed by the right lower door.

[0045] Further, look back Figure 5The locking rod 31 includes a transverse rod 311 slidably set on the rear wall of the cabinet, and a longitudinal rod 312 integrally formed at one end of the transverse rod 311. The other end of the transverse rod 311 is connected to the linear motion conversion mechanism 33. A locking groove 341 is provided on the locking plate 34, and the locking groove 341 is located on one side of the locking plate 34 to form a locking port for the longitudinal rod 312 to slide in or out in the horizontal direction.

[0046] Through the implementation of the above-mentioned embodiment of the locking system for the grounding switch 21 of the high-voltage switchgear 1, the locking rod 31 is located above the rear door 14 and is driven by the linear motion conversion mechanism 33 to perform horizontal linear motion. The locking plate 34 is located on the rear door 14. To ensure that the locking rod 31 and the locking plate 34 at different heights can smoothly complete locking or unlocking, the locking rod 31 is divided into two parts: a transverse rod 311 and a longitudinal rod 312. The transverse rod 311 is responsible for horizontal movement and is driven by the linear motion conversion mechanism 33; the longitudinal rod 312 is responsible for height positioning, that is, it is perpendicular to the lock slot 341 on the lock plate 34. The transverse rod 311 is driven by the linear motion conversion mechanism 33 to perform horizontal linear motion, thereby driving the longitudinal rod 312 to perform horizontal linear motion synchronously, so that the longitudinal rod 312 can slide horizontally into or out of the lock slot 341 to achieve locking or unlocking. The transverse rod 311 and longitudinal rod 312 can be constructed from a high-rigidity material (such as stainless steel or alloy steel) to form an integral "L"-shaped structure. The vertical alignment of the longitudinal rod 312 with the locking slot 341 does not rely on the vertical accuracy of the drive mechanism. Even if the cabinet is slightly tilted or deformed during installation, the longitudinal rod 312's gravity or guide structure automatically corrects alignment deviations, ensuring reliable locking. Furthermore, the transverse rod 311 is arranged horizontally along the cabinet's rear wall, while the longitudinal rod 312 extends vertically downward, fully utilizing the narrow space at the rear of the cabinet and preventing interference with cable routing within the cable compartment 13.

[0047] Furthermore, the locking module 3 further includes a crossbeam 35 located above the rear door 14. The crossbeam 35 is fixed to the rear wall of the cabinet. The top of the crossbeam 35 is bent inward to form a horizontal support beam. A guide plate 36 is provided on the support beam. The guide plate 36 is provided with a first guide hole for the transverse rod 311 to pass through transversely. The bottom of the crossbeam 35 is bent inward to form a horizontal support bottom beam. The support top beam and the support bottom beam are respectively provided with a second guide hole 351 for the longitudinal rod 312 to pass through longitudinally.

[0048] There is a clearance fit between the first guide hole and the transverse rod 311 . The second guide hole 351 is an elongated hole structure, and the length direction of the second guide hole 351 is consistent with the linear displacement direction of the transverse rod 311 .

[0049] Through the implementation of the above-mentioned locking system embodiment of the grounding switch 21 of the high-voltage switch cabinet 1, the crossbeam 35 is formed into a semi-closed frame structure by utilizing the double-layer bending design of the support top beam and the support bottom beam on the crossbeam 35, and the crossbeam 35 is fixed to the rear cabinet wall of the cabinet. The support top beam and the support bottom beam are combined to form a three-dimensional box-type bearing system, which can effectively disperse the force on the rear wall of the cabinet, avoid deformation of the crossbeam 35 caused by single-point stress concentration, and enhance its rigidity, making it suitable for high-vibration environments. A plurality of guide plates 36 can be provided on the support top beam, and the guide plates 36 are used to limit and guide the linear displacement of the transverse rod 311. Among them, the clearance between the transverse rod 311 and the first guide hole is used to limit the radial movement of the transverse rod 311, prevent radial deviation caused by inertia or vibration, and ensure that the longitudinal rod 312 is accurately aligned with the lock groove 341 on the lock plate 34. At the same time, the second guide hole 351 can be used to guide the lateral displacement of the longitudinal rod 312 , further ensuring that the longitudinal rod 312 can smoothly slide into or out of the locking slot 341 on the locking plate 34 .

[0050] Further, look back Figure 4 The linear motion conversion mechanism 33 includes an arc-shaped crank arm 331 and a first connecting plate 332 located above the cross beam 35. The middle part of the arc-shaped crank arm 331 is rotatably connected to the supporting top beam, one end of the arc-shaped crank arm 331 is rotatably connected to the end of the grounding pull rod 32, the other end of the arc-shaped crank arm 331 is rotatably connected to one end of the first connecting plate 332, and the end of the horizontal rod body 311 is rotatably connected to the other end of the first connecting plate 332, wherein the central angle of the arc-shaped crank arm 331 is greater than or equal to 90°, and the notch of the arc-shaped crank arm 331 faces the rear cabinet wall of the cabinet.

[0051] By implementing the above-mentioned embodiment of the locking system for the grounding switch 21 of the high-voltage switch cabinet 1, the displacement of the grounding rod 32 is used to drive the rotation of the curved crank arm 331, thereby converting the linear displacement of the grounding rod 32 into the linear displacement of the locking rod 31. That is, when the grounding switch 21 is opened, the grounding operating shaft 22 drives the grounding rod 32 to move upward, and the grounding rod 32 will tend to move toward the front of the cabinet. Since the notch of the curved crank arm 331 faces the rear cabinet wall of the cabinet, the curved crank arm 331 is pulled to rotate counterclockwise, and preferably rotated to 90°. The counterclockwise rotation of the curved crank arm 331 will drive the transverse rod body 311 to move closer to the curved crank arm 331 through the first connecting plate 332, and then drive the longitudinal rod body 312 to slide into the lock slot 341 on the lock plate 34 to complete the locking. Similarly, when the grounding switch 21 is switched on, the grounding operating shaft 22 drives the grounding rod 32 downward, causing the grounding rod 32 to move toward the rear of the cabinet, thereby causing the curved crank arm 331 to rotate clockwise, preferably 90 degrees. This clockwise rotation of the curved crank arm 331, via the first connecting plate 332, displaces the transverse rod 311 away from the curved crank arm 331, thereby sliding the longitudinal rod 312 out of the locking slot 341 on the locking plate 34, unlocking the lock. The curved crank arm 331 is used to convert the linear motion of the grounding rod 32 into vertical motion. However, since the end of the curved crank arm 331 moves along a circular arc as it rotates about its central hinge point, the first connecting plate 332, connected at one end to the curved crank arm 331 and at the other end to the transverse rod 311, further converts the rotational motion of the curved crank arm 331 into horizontal linear motion of the transverse rod 311, thereby achieving the required linear travel for locking.

[0052] Further, combined with Figure 4 and Figure 6 As shown, the linear motion conversion mechanism 33 also includes a support plate 333, and the arc-shaped crank arm 331 is connected to the support top beam through the support plate 333. The support plate 333 includes a bottom plate 3331, an intermediate plate 3332 and a top plate 3333 that are integrally formed in a "Z" shape. The bottom plate 3331 is horizontally arranged on the support top beam, and the intermediate plate 3332 extends obliquely upward in a direction away from the rear cabinet wall of the cabinet, and an avoidance gap is formed between the top plate 3333 and the rear cabinet wall of the cabinet, and the middle part of the arc-shaped crank arm 331 is rotatably connected to the top plate 3333.

[0053] By implementing the above-mentioned embodiment of the locking system of the grounding switch 21 of the high-voltage switch cabinet 1, the vertical space in the cabinet can be fully utilized by utilizing the "Z"-shaped support plate 333. The arc-shaped crank arm 331 is arranged on the top plate 3333 to avoid wear and rotation obstruction caused by direct contact with the horizontal direction when the arc-shaped crank arm 331 rotates. In addition, the intermediate plate 3332 extends obliquely upward in the direction away from the rear cabinet wall of the cabinet, so that an avoidance gap can be reserved between the top plate 3333 and the rear wall of the cabinet, thereby avoiding interference between the arc-shaped crank arm 331 and the cabinet when it rotates. In addition, by utilizing the inclined transition of the intermediate plate 3332, the rotational torque of the arc-shaped crank arm 331 can be decomposed into vertical and horizontal components, which are respectively borne by the bottom plate 3331 and the top plate 3333, thereby effectively avoiding stress concentration.

[0054] Further, combined with Figure 2 and Figure 7 As shown, the cabinet includes an isolation plate, the cable chamber 13 and the circuit breaker chamber 12 are separated by the isolation plate, the grounding switch 21 is arranged on the isolation plate, and the isolation plate is provided with a limiting hole for the grounding operating shaft 22 to pass through;

[0055] The opening and closing module 2 further includes a second connecting plate 23. The rotating shaft of the earthing switch 21 is rotatably connected to one end of the second connecting plate 23. The other end of the second connecting plate 23 is rotatably connected to the end of the earthing operating shaft 22. When the earthing operating shaft 22 moves backward, the contact blade of the earthing switch 21 rotates upward and opens the switch.

[0056] One end of the grounding rod 32 away from the arc-shaped arm 331 is rotatably connected to the middle of the second connecting plate 23, so that after the grounding operating shaft 22 moves backward, the grounding rod 32 drives the arc-shaped arm 331 to rotate counterclockwise and lock the locking rod 31 and the locking plate 34.

[0057] Through the implementation of the above-mentioned locking system embodiment of the grounding switch 21 of the high-voltage switch cabinet 1, the locking action of the rear door 14 of the high-voltage switch cabinet 1 is mechanically interlocked with the opening and closing operation of the grounding switch 21. When the grounding operating shaft 22 moves backward, the transmission of the second connecting plate 23 synchronously triggers the upward rotation of the contact knife of the grounding switch 21 to complete the opening, and the arc-shaped crank arm 331 rotates counterclockwise to drive the locking rod 31 to complete the locking action, so as to facilitate the subsequent triggering of the isolating switch to close and energize, forming an interlocking closed loop of "grounding opening-rear door 14 locking-isolating switch closing".

[0058] Furthermore, the grounding switch 21 is located in the cable chamber 13 near the bottom of the cabinet, and the grounding rod 32 includes an integrally formed first horizontal rod body 321, an intermediate rod body 322 and a second horizontal rod body 323. The first horizontal rod body 321 is flush with the arc-shaped arm 331, and the grounding rod 32 is connected to the arc-shaped arm 331 through the first horizontal rod body 321. The second horizontal rod body 323 is flush with the second connecting plate 23, and the grounding rod 32 is connected to the second connecting plate 23 through the second horizontal rod body 323.

[0059] Through the implementation of the above-described embodiment of the locking system for the grounding switch 21 of the high-voltage switchgear 1, the grounding switch 21 is positioned near the bottom of the cabinet to fully utilize the unused area below the cable compartment 13 and avoid interference with the busbar compartment 11 or circuit breaker compartment 12. Furthermore, the grounding switch 21 is positioned near the grounding bar, shortening the grounding path and reducing grounding resistance. However, this arrangement results in a vertical height difference between the grounding switch 21 and the locking module 3 on the rear door 14. If a single horizontal tie rod were used for direct connection, the excessive span would cause the tie rod to flex and deform. Therefore, in this embodiment of the present invention, the grounding tie rod 32 is divided into an integrally formed first horizontal rod 321, an intermediate rod 322, and a second horizontal rod 323. The first horizontal rod 321 is flush with the curved arm 331 of the locking module 3 to ensure a horizontal transmission line at high levels. The intermediate rod 322 is an inclined transition section that bridges the height difference between the grounding switch 21 and the locking module 3. The second horizontal rod 323 is flush with the operating shaft of the grounding switch 21 to ensure a horizontal transmission line at low levels. By using the intermediate rod body 322 as a vertical transition section, the high-position operation of the locking module 3 and the low-position action of the grounding switch 21 are seamlessly connected, so that the linear thrust of the grounding operating shaft 22 is transmitted along the axis of the grounding pull rod 32. There is no need to add auxiliary brackets or extend the cabinet height, ensuring that the locking action of the rear door 14 of the high-voltage switch cabinet 1 and the opening and closing operations of the grounding switch 21 are mechanically interlocked.

[0060] Furthermore, a positioning groove is provided on the end of the first horizontal rod body 321, which is horizontally fitted with the surface of the arc-shaped arm 331, and a "C"-shaped clamp 3231 is provided on the end of the second horizontal rod body 323. The second horizontal rod body 323 is rotatably connected to the second connecting plate 23 through the "C"-shaped clamp 3231, and the "C"-shaped clamp 3231 and the second connecting plate 23 are in a mating clamping arrangement.

[0061] Through the implementation of the above-described embodiment of the locking system for the grounding switch 21 of the high-voltage switchgear 1, the positioning groove at the end of the first horizontal rod 321 is horizontally aligned with the surface of the curved crank arm 331, forming a zero-clearance fit and ensuring a flat connection surface between the two. This improves the stability of the rotational connection between the first horizontal rod 321 and the curved crank arm 331 and eliminates installation offset. Furthermore, the "C"-shaped clamp 3231, which clamps the second connecting plate 23, ensures a stable connection between the second horizontal rod 323 and the second connecting plate 23 and allows for quick installation.

[0062] Furthermore, the opening and closing module 2 further includes an upper isolation unit, a lower isolation unit and a load unit;

[0063] The upper isolation unit includes an upper isolating switch 4 disposed in the busbar chamber 11, an upper isolating operating panel disposed on the front wall of the cabinet, and an upper isolating operating shaft 41 disposed in the circuit breaker chamber 12. The upper isolating operating panel is connected to the rotating shaft of the upper isolating switch 4 via the upper isolating operating shaft 41, so that when the upper isolating operating panel rotates, the upper isolating operating shaft 41 drives the upper isolating switch 4 to close or open.

[0064] The lower isolation unit includes a lower isolation switch 5 disposed in the cable chamber 13, a lower isolation operating panel disposed on the front wall of the cabinet, and a lower isolation operating shaft 51 disposed in the circuit breaker chamber 12. The lower isolation switch 5 and the grounding switch 21 are integrated. The lower isolation operating panel is connected to the rotating shaft of the lower isolation switch 5 via the lower isolation operating shaft 51. When the lower isolation operating panel rotates, the lower isolation operating shaft 51 drives the lower isolation switch 5 to close or open.

[0065] The load unit includes a vacuum interrupter 6 arranged at the upper disconnector 4, a load operating panel arranged on the front wall of the cabinet, and a load operating shaft 61 arranged in the circuit breaker chamber 12. The load operating panel is connected to the rotating shaft of the vacuum interrupter 6 through the load operating shaft 61, so that after the load operating panel rotates, the load operating shaft 61 drives the vacuum interrupter 6 to close or open.

[0066] Through the implementation of the above-mentioned high-voltage switch cabinet 1 grounding switch 21 locking system embodiment, the upper isolation unit is responsible for the isolation control of the busbar chamber 11 and the power supply side. After the upper isolation operating panel is rotated, the upper isolation operating shaft 41 drives the upper isolation switch 4 to close or open, thereby realizing rapid opening and closing of the high-voltage side; after the lower isolation unit is rotated by the lower isolation operating panel, the lower isolation operating shaft 51 drives the lower isolation switch 5 to close or open, thereby ensuring the forced timing of load power outage; the load unit independently controls the vacuum interrupter 6. After the load operating panel is rotated, the load operating shaft 61 drives the vacuum interrupter 6 to close or open, thereby accurately matching the opening and closing speed, meeting the high-frequency operation requirements, improving the safety and convenience of the switch cabinet 1, expanding the scope of application, and reducing production costs. Among them, after the grounding switch 21 is opened, the upper isolation switch 4, the lower isolation switch 5 and the vacuum interrupter 6 are closed in sequence, and vice versa.

[0067] The present invention also discloses a locking control method, which uses the above-mentioned locking system of the grounding switch 21 of the high-voltage switch cabinet 1. The locking control method includes:

[0068] Insert the operating handle into the grounding operating panel and pull it upward, driving the grounding operating shaft 22 to move upward, which in turn lifts the contact blade of the grounding switch 21 to complete the tripping operation. The grounding pull rod 32 moves upward simultaneously, and the linear motion conversion mechanism 33 drives the locking rod 31 to move linearly until it docks with the lock plate 34 to complete the locking.

[0069] By pulling the grounding operating plate downward with the operating handle, the grounding operating shaft 22 is driven to move downward, and the contact knife of the grounding switch 21 is driven to rotate downward to complete the closing. The grounding pull rod 32 moves downward synchronously, and the linear motion conversion mechanism 33 drives the locking rod 31 to move linearly until it separates from the lock plate 34 to complete the unlocking.

[0070] Through the implementation of the above-mentioned locking control method embodiment, the grounding switch 21 is opened or closed, and the grounding operating shaft 22 synchronously drives the grounding pull rod 32 to perform linear displacement forward and backward, and through the setting of the linear motion conversion mechanism 33, the forward and backward displacement of the grounding pull rod 32 is converted into a linear displacement of the locking rod 31 along the width direction of the rear inner wall of the cabinet, so that the locking rod 31 is controlled by mechanical transmission to dock and separate with the lock plate 34 on the rear door 14, thereby realizing the locking and unlocking of the rear door 14, and then by providing a new mechanical compulsory locking form, there is no need to worry about locking failure due to electrical circuit failure, which is safer and more reliable.

[0071] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Those skilled in the art may modify the technical solutions described in the above embodiments, or replace some of the technical features therein with equivalents; and all these modifications and replacements should fall within the scope of protection of the present invention.

Claims

1. A high-voltage switch cabinet grounding switch locking system, characterized by: The high-voltage switch cabinet grounding switch locking system includes a switch cabinet, and an opening and closing module and a locking module arranged on the switch cabinet; The switch cabinet includes a cabinet body, and a busbar room, a circuit breaker room and a cable room which are arranged in isolation within the cabinet body. The cabinet body is provided with a rear door corresponding to the cable room on the rear cabinet wall; The opening and closing module includes a grounding unit, which includes a grounding switch arranged in the cable chamber, a grounding operating panel arranged on the front wall of the cabinet, and a grounding operating shaft arranged in the circuit breaker chamber, wherein the grounding operating shaft is perpendicular to the rear door, and the grounding operating panel is mechanically connected to the grounding switch via the grounding operating shaft. The grounding operating panel drives the grounding operating shaft to move forward and backward by rotating, thereby driving the grounding switch to close or open. The locking module includes a locking rod, a grounding pull rod, a linear motion conversion mechanism and a lock plate, wherein the locking rod is located above the rear-opening door and includes a transverse rod body slidably arranged on the rear cabinet wall of the cabinet along the width direction of the rear-opening door, and a longitudinal rod body integrally formed at one end of the transverse rod body, one end of the grounding pull rod is rotatably connected to the grounding operating shaft, and the other end of the grounding pull rod is connected to one end of the locking rod through the linear motion conversion mechanism, the lock plate is provided on the rear-opening door, and the other end of the locking rod is docked with or separated from the lock plate by linear displacement; The locking module further comprises a crossbeam located above the rear door, the crossbeam being fixedly attached to the rear wall of the cabinet, the top of the crossbeam being bent inwardly to form a horizontally arranged support top beam, the support top beam being provided with a guide plate, the guide plate being provided with a first guide hole for the transverse rod to pass through transversely, the bottom of the crossbeam being bent inwardly to form a horizontally arranged support bottom beam, the support top beam and the support bottom beam being respectively provided with a second guide hole for the longitudinal rod to pass through longitudinally, the second guide hole being an elongated hole structure; The linear motion conversion mechanism includes an arc-shaped crank arm and a first connecting plate located above the crossbeam, the middle part of the arc-shaped crank arm is rotatably connected to the supporting top beam, one end of the arc-shaped crank arm is rotatably connected to the end of the grounding pull rod, the other end of the arc-shaped crank arm is rotatably connected to one end of the first connecting plate, and the end of the transverse rod body is rotatably connected to the other end of the first connecting plate, wherein the central angle of the arc-shaped crank arm is greater than or equal to 90°, and the notch of the arc-shaped crank arm faces the rear cabinet wall of the cabinet body.

2. The high-voltage switch cabinet grounding switch locking system according to claim 1, characterized in that: The other end of the transverse rod is connected to the linear motion conversion mechanism. A locking groove is provided on the locking plate, and the locking groove is located on one side of the locking plate to form a locking opening for the longitudinal rod to slide in or out horizontally.

3. The high-voltage switch cabinet grounding switch locking system according to claim 1, characterized in that: The first guide hole and the transverse rod body are clearance-fitted, and the length direction of the second guide hole is consistent with the linear displacement direction of the transverse rod body.

4. The high-voltage switch cabinet grounding switch locking system according to claim 1, characterized in that: The linear motion conversion mechanism also includes a support plate, and the arc-shaped crank arm is connected to the support top beam through the support plate. The support plate includes a bottom plate, an intermediate plate and a top plate that are integrally formed in a "Z" shape. The bottom plate is horizontally arranged on the support top beam, and the intermediate plate extends obliquely upward in a direction away from the rear cabinet wall of the cabinet, and an avoidance gap is formed between the top plate and the rear cabinet wall of the cabinet, and the middle part of the arc-shaped crank arm is rotatably connected to the top plate.

5. The high-voltage switch cabinet grounding switch locking system according to claim 4, characterized in that: The cabinet includes an isolation plate, the cable chamber and the circuit breaker chamber are separated by the isolation plate, the grounding switch is arranged on the isolation plate, and the isolation plate is provided with a limiting hole for the grounding operating shaft to pass through; The opening and closing module further includes a second connecting plate, the rotating shaft of the earthing switch is rotatably connected to one end of the second connecting plate, and the other end of the second connecting plate is rotatably connected to the end of the earthing operating shaft, so that when the earthing operating shaft moves backward, the contact blade of the earthing switch rotates upward and opens the circuit breaker; One end of the grounding pull rod away from the arc-shaped crank arm is rotatably connected to the middle part of the second connecting plate, so that after the grounding operating shaft moves backward, the grounding pull rod drives the arc-shaped crank arm to rotate counterclockwise and locks the locking rod and the locking plate.

6. The high-voltage switch cabinet grounding switch locking system according to claim 5, characterized in that: The grounding switch is located in the cable room near the bottom of the cabinet, and the grounding rod includes an integrally formed first horizontal rod body, an intermediate rod body and a second horizontal rod body. The first horizontal rod body is flush with the arc-shaped elbow, and the grounding rod is connected to the arc-shaped elbow through the first horizontal rod body. The second horizontal rod body is flush with the second connecting plate, and the grounding rod is connected to the second connecting plate through the second horizontal rod body.

7. The high-voltage switch cabinet grounding switch locking system according to claim 6, characterized in that: A positioning groove is provided on the end of the first horizontal rod body, which is horizontally fitted with the surface of the arc-shaped elbow arm. A "C"-shaped clamp is provided on the end of the second horizontal rod body. The second horizontal rod body is rotatably connected to the second connecting plate through the "C"-shaped clamp, and the "C"-shaped clamp and the second connecting plate are in a mating clamping arrangement.

8. The high-voltage switch cabinet grounding switch locking system according to claim 5, characterized in that: The opening and closing module also includes an upper isolation unit, a lower isolation unit and a load unit; The upper isolation unit includes an upper isolating switch arranged in the busbar chamber, an upper isolating operating panel arranged on the front wall of the cabinet body, and an upper isolating operating shaft arranged in the circuit breaker chamber. The upper isolating operating panel is connected to the rotating shaft of the upper isolating switch via the upper isolating operating shaft, so that when the upper isolating operating panel rotates, the upper isolating operating shaft drives the upper isolating switch to close or open. The lower isolation unit includes a lower isolation switch arranged in the cable room, a lower isolation operating panel arranged on the front wall of the cabinet body, and a lower isolation operating shaft arranged in the circuit breaker room. The lower isolation switch and the grounding switch are integrated. The lower isolation operating panel is connected to the rotating shaft of the lower isolation switch through the lower isolation operating shaft, so that when the lower isolation operating panel is rotated, the lower isolation operating shaft drives the lower isolation switch to close or open. The load unit includes a vacuum interrupter arranged at the upper disconnector, a load operating panel arranged on the front wall of the cabinet body, and a load operating shaft arranged in the circuit breaker chamber. The load operating panel is connected to the rotating shaft of the vacuum interrupter through the load operating shaft, so that after the load operating panel rotates, the load operating shaft drives the vacuum interrupter to close or open.

9. A locking control method, characterized in that: The high-voltage switch cabinet grounding switch locking system according to any one of claims 1 to 8 is adopted, wherein the locking control method comprises: Insert the operating handle into the grounding operating plate and pull it upward to drive the grounding operating shaft to move upward, thereby lifting the contact knife of the grounding switch to complete the tripping operation. The grounding pull rod moves upward synchronously, and the linear motion conversion mechanism drives the locking rod to move linearly until it docks with the lock plate to complete the locking operation. The grounding operating plate is pulled downward by the operating handle to drive the grounding operating shaft to move downward, and the contact knife of the grounding switch is driven to rotate downward to complete the closing. The grounding pull rod moves downward synchronously, and the linear motion conversion mechanism drives the locking rod to move linearly until it is separated from the lock plate to complete the unlocking.

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