An automatic breaking device for grounding switch of electrical switch cabinet

Abstract

This invention relates to the field of grounding switch technology, specifically to an automatic grounding switch disconnection device for electrical switchgear. The device includes a switchgear body, a cabinet door hinged to one side of the switchgear body, an operating panel fixedly connected to the side of the switchgear body near the cabinet door, and an observation window on the cabinet door. A grounding switch body is fixedly connected within the switchgear body, and an automatic disconnection assembly is located below the grounding switch body. In operation, after closing the circuit breaker, the limit pawl engages the synchronous ratchet, ensuring stable engagement between the moving and stationary contacts, thus guaranteeing maintenance safety. Closing and unlocking the door are linked; the door can only be opened after the circuit breaker is fully closed, enhancing safety and standardization. After maintenance, closing the cabinet door automatically releases the limit pawl and synchronous ratchet, and the door lock is linked to the internal structure, ensuring that the circuit breaker can only be disconnected after the cabinet door is fully closed and locked. The operation process is rigorous and orderly, comprehensively improving the safety and reliability of the electrical switchgear.

Description

Technical Field

[0001] This invention relates to the field of grounding switch technology, specifically an automatic disconnection device for grounding switches in electrical switchgear. Background Technology

[0002] Grounding switches are indispensable safety devices in power systems. They are generally installed in electrical switch cabinets and are electrically or mechanically interlocked with circuit breakers to ensure that the grounding switch cannot be closed when the circuit breaker is closed, thus preventing live-grounding accidents. When repairing electrical equipment or lines, the grounding switch can reliably ground the equipment or lines. Even if power is suddenly restored during the repair process, the current will be conducted to the ground through the grounding wire, forcing the protection device to trip, thereby preventing repair personnel from being electrocuted.

[0003] The grounding switch interlocking structure is an important safety protection mechanism in electrical switchgear. It ensures, through mechanical or electrical means, that the operating sequence and status between the grounding switch and other electrical equipment (such as circuit breakers, disconnect switches, etc.) comply with safety regulations, thereby preventing safety accidents caused by misoperation.

[0004] Currently, there are two main types of interlocking mechanisms for grounding switches: manual and automatic. However, both manual and automatic interlocking have relatively complex mechanical structures. During operation, operators need to be familiar with the interlocking logic and operating procedures. If operators are unfamiliar with or negligent, misoperation may occur, causing the moving and stationary contacts to separate. If the moving and stationary contacts accidentally separate during maintenance work, it may lead to a sudden interruption or abnormal flow of current, which could result in electric shock or other dangerous situations and cause safety accidents.

[0005] Therefore, those skilled in the art have provided an automatic disconnection device for grounding switches in electrical switchgear to solve the problems mentioned in the background art. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic disconnection device for grounding switches in electrical switchgear, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] An automatic disconnection device for grounding switch in an electrical switch cabinet includes a switch cabinet body, a cabinet door is hinged to one side of the switch cabinet body, an operation panel is fixedly connected to the side of the switch cabinet body near the cabinet door, an observation window is also provided on the cabinet door, a grounding switch body is fixedly connected to the switch cabinet body, and an automatic disconnection component is provided below the grounding switch body.

[0009] The automatic disconnection assembly includes an electric disconnection assembly and a manual disconnection assembly disposed below the grounding switch body. The manual disconnection assembly is rotatably connected inside the switch cabinet body, and the end of the manual disconnection assembly near the electric disconnection assembly is connected to the electric disconnection assembly. A limiting assembly for limiting the automatic disconnection assembly is rotatably connected to the grounding switch body. A control panel for controlling the opening and closing of the electric disconnection assembly is fixedly connected to the cabinet door. An operating hole communicating with the manual disconnection assembly is opened on the side of the cabinet door near the manual disconnection assembly.

[0010] Preferably, the grounding switch body includes a switch frame, which is fixedly connected to the inner wall of the switch cabinet body. Multiple sets of insulators are fixedly connected to the switch frame, and a stationary contact is fixedly connected to the end of each set of insulators away from the switch frame.

[0011] Preferably, the electric disconnecting assembly includes a rotary motor, which is fixedly connected to the inner wall of one side of the switch cabinet body. A rotating rod is fixedly connected to the output end of the rotary motor. Multiple sets of rotating shafts are rotatably connected to the rotating rod. The rotating rod is fixedly connected to the bottom of the switch frame through the multiple sets of rotating shafts. Multiple sets of moving contacts are also fixedly connected to the rotating rod, and the multiple sets of moving contacts are respectively located directly below multiple sets of insulators.

[0012] A first bevel gear is fixedly connected to one end of the rotating rod near the rotating motor. The first bevel gear meshes with the manual disconnection component and the limiting component, respectively.

[0013] Preferably, the manual disconnection assembly includes a rotating head, which is rotatably connected to the operation panel. A synchronizing rod is fixedly connected to one end of the rotating head near the interior of the switch cabinet body, and a second bevel gear is fixedly connected to the other end of the synchronizing rod away from the rotating head. The second bevel gear meshes with the first bevel gear.

[0014] The rotating head has a rotating hole at the end away from the synchronizing rod, and the rotating hole is connected to the operating hole on the cabinet door. The end of the rotating head away from the synchronizing rod is also fixedly connected to a synchronizing gear, and a lock hole blocking component is connected to the synchronizing gear.

[0015] Preferably, the limiting component includes a third bevel gear, which is rotatably connected to the bottom of the switch frame and meshes with a first bevel gear. The top of the third bevel gear passes through the switch frame and extends to the top of the switch frame. A synchronous ratchet is fixedly connected to the extended end of the third bevel gear. A fixed shaft is also fixedly connected to the top of the switch frame near the synchronous ratchet. A limiting pawl is rotatably connected to the fixed shaft via a rotating shaft, and the limiting pawl engages with the teeth on the synchronous ratchet. A torsion spring is provided between the fixed shaft and the limiting pawl.

[0016] Preferably, an adjusting plate is fixedly connected to the top of the limiting pawl, and a synchronous connecting rod is fixedly connected to the adjusting plate. One end of the synchronous connecting rod is rotatably connected to an adjusting connecting rod via a rotating shaft. The end of the adjusting connecting rod away from the synchronous connecting rod passes through and extends to the outside of the operating panel. A limiting frame is also fixedly connected to the side of the operating panel near the inside of the switch cabinet body, and the adjusting connecting rod is slidably connected to the limiting frame.

[0017] Preferably, the switch cabinet body is further provided with a lock body, the switch cabinet body is fixed to the cabinet door by the lock body, the cabinet door is provided with a connecting hole that communicates with the lock hole of the lock body, and the lock hole blocking component is provided between the operating plate and the lock body.

[0018] Preferably, the keyhole blocking assembly includes a blocking plate, which is slidably connected between the lock body and the operating plate. A connecting plate is fixedly connected to one side of the blocking plate, and a synchronous rack is fixedly connected to the bottom of the connecting plate. The synchronous rack meshes with a synchronous gear. An auxiliary frame is also fixedly connected to the side of the operating plate near the synchronous rack, and the synchronous rack is slidably connected within the auxiliary frame.

[0019] Preferably, two sets of positioning display panels are fixedly connected to one end of the synchronizing rod near the rotating head, and a display slot for displaying the positioning display panels is fixedly connected to the cabinet door.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. In use, after the circuit breaker is closed, the limiting pawl engages with the teeth of the synchronous ratchet, preventing the ratchet from rotating and thus fixing the third bevel gear. Since the third bevel gear meshes with the first bevel gear, the first bevel gear also cannot rotate. This ensures that the moving contact always remains engaged with the stationary contact. When operators are performing maintenance work, this effectively prevents the moving and stationary contacts from accidentally tripping, providing reliable safety for maintenance personnel and avoiding dangerous situations such as electric shock caused by accidental tripping, greatly reducing safety risks during maintenance.

[0022] 2. In this invention, when the rotating rod drives the synchronizing rod to rotate, the synchronizing gear rotates synchronously, pushing the synchronizing rack to slide upward within the auxiliary frame. This, in turn, drives the blocking plate to move upward synchronously through the connecting plate, causing the blocking plate to move away from the lock hole of the lock body. After the switch is closed, the blocking plate is completely removed, allowing the operator to insert the key through the connecting hole into the lock hole of the lock body to unlock and open the cabinet door. This linkage design closely links the switch closing and unlocking / opening operations. The door opening operation can only be performed after the switch is fully closed, further enhancing the safety of the equipment and the standardization of operation.

[0023] 3. In this invention, when performing a circuit breaker operation after maintenance, during the closing of the cabinet door, the cabinet door will push the adjusting linkage to move, causing the adjusting linkage to push the adjusting disc to rotate. This causes the limit pawl to flip and disengage from the teeth on the synchronous ratchet. After the cabinet door is locked, the third bevel gear and the synchronous ratchet are no longer engaged by the limit pawl and can rotate smoothly. At this time, starting the rotary motor will drive the rotating rod to rotate, thereby separating the moving contact from the stationary contact to complete the circuit breaker operation. This automatic release mechanism makes the circuit breaker operation smoother and more efficient. At the same time, this linkage design between the door lock and the internal mechanical structure of the switch cabinet ensures that the circuit breaker operation can only be performed when the cabinet door is closed and locked, further ensuring the safety of the operator and making the entire operation process more rigorous and orderly. Attached Figure Description

[0024] Figure 1 This is a first-view schematic diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the switch cabinet body in this invention;

[0026] Figure 3 This is a schematic diagram of the structure of the grounding switch body and the electric disconnecting assembly in this invention. Figure 1 ;

[0027] Figure 4 This is a schematic diagram of the structure of the grounding switch body and the electric disconnecting assembly in this invention. Figure 2 ;

[0028] Figure 5 In this invention Figure 4 Enlarged schematic diagram of the structure at point B above;

[0029] Figure 6 This is a schematic diagram of the keyhole blocking component in this invention;

[0030] Figure 7 This is a schematic diagram of the limiting component in this invention;

[0031] Figure 8 In this invention Figure 1 An enlarged schematic diagram of the structure at point A.

[0032] In the diagram: 1. Switchgear body; 11. Cabinet door; 12. Observation window; 13. Operating hole; 14. Connecting hole; 15. Control panel; 16. Display slot; 17. Operating panel; 18. Lock body; 2. Grounding switch body; 21. Switch frame; 22. Insulator; 23. Stationary contact; 3. Electric disconnecting assembly; 31. Rotary motor; 32. Rotating rod; 33. Moving contact; 34. First bevel gear; 4. Manual disconnecting assembly; 1. Rotating head; 42. Rotating hole; 43. Synchronizing rod; 44. Second bevel gear; 45. Position display plate; 46. Synchronizing gear; 5. Lock hole blocking assembly; 51. Blocking plate; 52. Connecting plate; 53. Synchronizing rack; 54. Auxiliary frame; 6. Limiting assembly; 61. Third bevel gear; 62. Synchronizing ratchet; 63. Fixed shaft; 64. Limiting pawl; 65. Adjusting disc; 66. Synchronizing connecting rod; 67. Adjusting connecting rod. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] Example 1, please refer to Figure 1-8An automatic disconnection device for a grounding switch in an electrical switchgear includes a switchgear body 1. A cabinet door 11 is hinged to one side of the switchgear body 1. An operating panel 17 is fixedly connected to the side of the switchgear body 1 near the cabinet door 11. An observation window 12 is also provided on the cabinet door 11. A grounding switch body 2 is fixedly connected to the switchgear body 1. An automatic disconnection assembly is located below the grounding switch body 2. A lock body 18 is also provided in the switchgear body 1. The switchgear body 1 is fixed to the cabinet door 11 via the lock body 18. A communicating hole 14 is provided on the cabinet door 11, communicating with the lock hole of the lock body 18. A lock hole blocking assembly 5 is also provided between the operating panel 17 and the lock body 18. The automatic disconnection assembly includes an electrically operated disconnection assembly 3 located below the grounding switch body 2. The switch cabinet body 1 includes a manual disconnection component 4, which is rotatably connected to the switch cabinet body 1. The end of the manual disconnection component 4 near the electric disconnection component 3 is connected to the electric disconnection component 3. The grounding switch body 2 is rotatably connected to a limit component 6 for limiting the automatic disconnection component. The cabinet door 11 is fixedly connected to a control panel 15 for controlling the opening and closing of the electric disconnection component 3. The cabinet door 11 is provided with an operation hole 13 connected to the manual disconnection component 4 on the side near the manual disconnection component 4. The grounding switch body 2 includes a switch frame 21, which is fixedly connected to the inner wall of the switch cabinet body 1. Multiple sets of insulators 22 are fixedly connected to the switch frame 21, and a stationary contact 23 is fixedly connected to the end of each set of insulators 22 away from the switch frame 21.

[0036] Specifically, during use, when it is necessary to close or open the grounding switch body 2, the electric disconnection component 3 can be activated through the control panel 15. The electric disconnection component 3 can then be used to close or open the grounding switch body 2. When the electric disconnection component 3 is activated to close the switch, it simultaneously activates the lock hole blocking component 5 through the manual disconnection component 4. This causes the lock hole blocking component 5 to move away from the lock hole of the lock body 18, exposing the lock hole. After the grounding switch body 2 has completed the closing operation, the lock hole blocking component 5 is completely removed from the lock hole, exposing the lock hole completely. The operator can then use a key inserted through the connecting hole 14 into the lock hole of the lock body 18 to unlock the lock body 18, allowing the cabinet door 11 to be opened for maintenance and other work.

[0037] After the grounding switch body 2 completes the closing operation, the electric disconnecting component 3 is fixed under the limit of the limiting component 6. At this time, the grounding switch body 2 cannot be opened by manual or electric means, thus avoiding the safety hazard caused by the operator accidentally opening the grounding switch body 2 when opening the cabinet door 11.

[0038] In this embodiment, the electric disconnecting assembly 3 includes a rotary motor 31, which is fixedly connected to the inner wall of one side of the switch cabinet body 1. A rotary rod 32 is fixedly connected to the output end of the rotary motor 31. Multiple sets of rotating shafts are rotatably connected to the rotary rod 32. The rotary rod 32 is fixedly connected to the bottom of the switch frame 21 through the multiple sets of rotating shafts. Multiple sets of moving contacts 33 are also fixedly connected to the rotary rod 32, and the multiple sets of moving contacts 33 are respectively located directly below the multiple sets of insulators 22. A first bevel gear 34 is also fixedly connected to the end of the rotary rod 32 near the rotary motor 31. The first bevel gear 34 meshes with the manual disconnecting assembly 4 and the limiting assembly 6 respectively.

[0039] Specifically, when performing the closing operation, the rotary motor 31 is first started through the control panel 15. The rotary motor 31 drives the rotary rod 32 to rotate, and the rotary rod 32 simultaneously drives multiple sets of moving contacts 33 to rotate, so that the multiple sets of moving contacts 33 respectively engage with the stationary contacts 23 on the insulator 22 to complete the closing operation.

[0040] After the maintenance is completed and the cabinet door 11 is closed, the rotary motor 31 is started again, causing the rotary motor 31 to drive the rotary rod 32 to reverse, which will separate the moving contact 33 from the stationary contact 23 and complete the tripping.

[0041] In this embodiment, the manual disconnection component 4 includes a rotating head 41, which is rotatably connected to the operation panel 17. A synchronizing rod 43 is fixedly connected to one end of the rotating head 41 near the interior of the switch cabinet body 1. A second bevel gear 44 is fixedly connected to one end of the synchronizing rod 43 away from the rotating head 41. The second bevel gear 44 meshes with the first bevel gear 34. A rotating hole 42 is opened at one end of the rotating head 41 away from the synchronizing rod 43, and the rotating hole 42 is connected to the operation hole 13 on the cabinet door 11. A synchronizing gear 46 is also fixedly connected to one end of the rotating head 41 away from the synchronizing rod 43. The synchronizing gear 46 is connected to the lock hole blocking component 5. Two sets of position display boards 45 are also fixedly connected to one end of the synchronizing rod 43 near the rotating head 41. A display slot 16 for displaying the position display board 45 is fixedly connected to the cabinet door 11.

[0042] Specifically, when manually closing or opening the circuit breaker, first insert a tool into the operating hole 13, then insert the tool into the rotating hole 42. Rotate the tool to drive the rotating head 41 to rotate, which in turn drives the synchronizing rod 43 to rotate. When the synchronizing rod 43 rotates, it simultaneously drives the second bevel gear 44 to rotate. The second bevel gear 44 meshes with the first bevel gear 34, which in turn drives the first bevel gear 34 to rotate, causing the rotating rod 32 to rotate. The rotating rod 32 then drives the moving contact 33 to rotate, thus achieving the closing operation.

[0043] When performing the opening operation, insert the tool into the rotating hole 42 and rotate it in the opposite direction. This will cause the rotating head 41 to drive the synchronizing rod 43 to rotate in the opposite direction, causing the moving contact 33 to separate from the stationary contact 23, thus achieving the opening operation.

[0044] When the cabinet door 11 is closed and the synchronizing rod 43 rotates to close the circuit, the synchronizing rod 43 simultaneously drives the position display board 45 to rotate, causing the position display board 45, which originally displayed the open circuit status, to move away from the display slot 16. When the circuit is closed, the position display board 45 on the synchronizing rod 43, which displays the closed circuit status, moves to the display slot 16. The observation window 12 set on the cabinet door 11 allows for a direct observation of whether the circuit is closed or open.

[0045] In this embodiment, the limiting component 6 includes a third bevel gear 61, which is rotatably connected to the bottom of the switch frame 21 and meshes with the first bevel gear 34. The top of the third bevel gear 61 passes through the switch frame 21 and extends to the top of the switch frame 21. A synchronous ratchet 62 is fixedly connected to the extended end of the third bevel gear 61. A fixed shaft 63 is also fixedly connected to the top of the switch frame 21 near the synchronous ratchet 62. A limiting pawl 64 is rotatably connected to the fixed shaft 63 via a rotating shaft, and the limiting pawl 64 meshes with the first bevel gear 34. The teeth on the step ratchet 62 are engaged. A torsion spring is provided between the fixed shaft 63 and the limiting pawl 64. An adjusting plate 65 is also fixedly connected to the top of the limiting pawl 64. A synchronous connecting rod 66 is fixedly connected to the adjusting plate 65. One end of the top of the synchronous connecting rod 66 is rotatably connected to the adjusting connecting rod 67 through a rotating shaft. The end of the adjusting connecting rod 67 away from the synchronous connecting rod 66 passes through and extends to the outside of the operating plate 17. A limiting frame is also fixedly connected to the side of the operating plate 17 near the inside of the switch cabinet body 1. The adjusting connecting rod 67 is slidably connected to the limiting frame.

[0046] When using the electric disconnecting assembly 3 or the manual disconnecting assembly 4 to perform closing and opening operations, when the rotary motor 31 or the second bevel gear 44 drives the first bevel gear 34 to rotate, the first bevel gear 34 simultaneously drives the third bevel gear 61 to rotate, and the third bevel gear 61 drives the synchronous ratchet 62 to rotate. When performing closing operations, the teeth on the synchronous ratchet 62 continuously push the limit pawl 64, and the limit pawl 64 passes over the synchronous ratchet 62, so that the synchronous ratchet 62 can rotate synchronously with the third bevel gear 61, so that the moving contact 33 can rotate smoothly to perform closing operations.

[0047] After the circuit breaker is closed, the limit pawl 64 engages with the teeth of the synchronous ratchet 62, preventing the synchronous ratchet 62 from rotating. This, in turn, fixes the third bevel gear 61. Since the third bevel gear 61 meshes with the first bevel gear 34, the first bevel gear 34 also cannot rotate when the third bevel gear 61 is fixed. This keeps the moving contact 33 engaged with the stationary contact 23, ensuring that the moving contact 33 and the stationary contact 23 will not trip during maintenance, thus ensuring the safety of the operator during maintenance.

[0048] After the maintenance is completed, close the cabinet door 11 and fix the switch cabinet body 1 to the cabinet door 11 by the lock body 18. During the closing process of the cabinet door 11, the cabinet door 11 continuously pushes the adjusting rod 67 to move, so that the adjusting rod 67 slides towards the inside of the switch cabinet body 1. When the adjusting rod 67 slides, it pushes the adjusting plate 65 to rotate through the synchronous connecting rod 66. The adjusting plate 65 drives the limit pawl 64 to flip, so that the limit pawl 64 disengages from the teeth on the synchronous ratchet 62. At the same time, the torsion spring between the fixed shaft 63 and the limit pawl 64 is compressed and stored.

[0049] When the cabinet door 11 is locked to the switch cabinet body 1, and the rotary motor 31 is started to drive the rotary rod 32 to rotate, the third bevel gear 61 and the synchronous ratchet 62 are no longer blocked by the limit pawl 64 and can rotate smoothly, thereby allowing the first bevel gear 34 and the moving contact 33 to rotate smoothly, so that the moving contact 33 can separate from the stationary contact 23 to complete the opening operation.

[0050] When the switch is closed again and the cabinet door 11 is opened, the adjusting rod 67 is no longer limited by the cabinet door 11. Under the action of the torsion spring between the fixed shaft 63 and the limiting pawl 64, the limiting pawl 64 drives the adjusting plate 65 to reverse. The adjusting plate 65 pushes the adjusting rod 67 to slide towards the outside of the switch cabinet body 1 through the synchronous connecting rod 66, and the limiting pawl 64 can then engage with the teeth on the synchronous ratchet 62 again.

[0051] In this embodiment, the keyhole blocking assembly 5 includes a blocking plate 51, which is slidably connected between the lock body 18 and the operating plate 17. A connecting plate 52 is fixedly connected to one side of the blocking plate 51, and a synchronous rack 53 is fixedly connected to the bottom of the connecting plate 52. The synchronous rack 53 meshes with the synchronous gear 46. An auxiliary frame 54 is also fixedly connected to the side of the operating plate 17 near the synchronous rack 53, and the synchronous rack 53 is slidably connected inside the auxiliary frame 54.

[0052] Before closing the circuit breaker, the shield 51 covers the lock hole of the lock body 18. When the rotating rod 32 rotates and drives the moving contact 33 to close the circuit breaker, the first bevel gear 34 simultaneously drives the synchronizing rod 43 to rotate, causing the synchronizing gear 46 to rotate synchronously. When the synchronizing gear 46 rotates, it pushes the synchronizing rack 53 to slide upward in the auxiliary frame 54. The synchronizing rack 53 drives the shield 51 to move upward synchronously through the connecting plate 52, so that the shield 51 is removed from the lock hole of the lock body 18. After closing the circuit breaker is completed, the shield 51 is completely removed from the lock hole. The key is inserted into the lock hole of the lock body 18 through the connecting hole 14 to unlock the lock body 18 and open the cabinet door 11 for maintenance and other work.

[0053] The working principle of this invention is:

[0054] When performing electric closing operation, the rotary motor 31 is first started through the control panel 15. The rotary motor 31 drives the rotary rod 32 to rotate, and the rotary rod 32 simultaneously drives multiple sets of moving contacts 33 to rotate, so that the multiple sets of moving contacts 33 respectively engage with the stationary contacts 23 on the insulator 22 to complete the closing operation. When the rotary rod 32 rotates, the rotary rod 32 drives the second bevel gear 44 and the synchronizing rod 43 to rotate through the first bevel gear 34. The synchronizing rod 43 simultaneously drives the position display plate 45 to rotate, so that the position display plate 45, which originally showed the open status, moves away from the display slot 16. When the closing is in place, the position display plate 45 on the synchronizing rod 43, which shows the closing status, moves to the display slot 16. The closing or opening status can be directly observed through the observation window 12 set on the cabinet door 11.

[0055] When the rotary motor 31 drives the first bevel gear 34 to rotate, the first bevel gear 34 simultaneously drives the third bevel gear 61 to rotate, and the third bevel gear 61 drives the synchronous ratchet 62 to rotate. The teeth on the synchronous ratchet 62 continuously push the limiting pawl 64, and the limiting pawl 64 passes over the synchronous ratchet 62, so that the synchronous ratchet 62 can rotate synchronously with the third bevel gear 61, so that the moving contact 33 can rotate smoothly and perform the closing operation.

[0056] After the circuit breaker is closed, the limit pawl 64 engages with the teeth of the synchronous ratchet 62, preventing the synchronous ratchet 62 from rotating. This, in turn, fixes the third bevel gear 61. Since the third bevel gear 61 meshes with the first bevel gear 34, the first bevel gear 34 also cannot rotate when the third bevel gear 61 is fixed. This keeps the moving contact 33 engaged with the stationary contact 23, ensuring that the moving contact 33 and the stationary contact 23 will not trip during maintenance, thus ensuring the safety of the operator during maintenance.

[0057] When the rotating rod 32 drives the synchronizing rod 43 to rotate, the synchronizing gear 46 rotates synchronously. When the synchronizing gear 46 rotates, it pushes the synchronizing rack 53 to slide upward in the auxiliary frame 54. The synchronizing rack 53 drives the blocking plate 51 to move upward synchronously through the connecting plate 52, so that the blocking plate 51 is removed from the lock hole of the lock body 18. After the switch is closed, the blocking plate 51 is completely removed from the lock hole. The key is inserted into the lock hole of the lock body 18 through the connecting hole 14 to unlock the lock body 18 and open the cabinet door 11.

[0058] When performing manual closing operation, insert a tool into the operating hole 13 and into the rotating hole 42. Rotate the tool to drive the rotating head 41 to rotate, which in turn drives the synchronizing rod 43 to rotate. When the synchronizing rod 43 rotates, it simultaneously drives the second bevel gear 44 to rotate. The second bevel gear 44 meshes with the first bevel gear 34, which in turn drives the first bevel gear 34 to rotate, causing the rotating rod 32 to rotate. The rotating rod 32 then drives the moving contact 33 to rotate, thus achieving the closing operation.

[0059] When the switch is tripped after maintenance, the cabinet door 11 is closed first. The switch cabinet body 1 is fixed to the cabinet door 11 by the lock body 18. During the closing process of the cabinet door 11, the cabinet door 11 continuously pushes the adjusting rod 67 to move, so that the adjusting rod 67 slides towards the inside of the switch cabinet body 1. When the adjusting rod 67 slides, it pushes the adjusting plate 65 to rotate through the synchronous connecting rod 66. The adjusting plate 65 drives the limit pawl 64 to flip, so that the limit pawl 64 disengages from the teeth on the synchronous ratchet 62. At the same time, the torsion spring between the fixed shaft 63 and the limit pawl 64 is compressed and stored.

[0060] When the cabinet door 11 is locked to the switch cabinet body 1, and the rotary motor 31 is started to drive the rotary rod 32 to rotate, the third bevel gear 61 and the synchronous ratchet 62 are no longer blocked by the limit pawl 64 and can rotate smoothly, thereby allowing the first bevel gear 34 and the moving contact 33 to rotate smoothly, so that the moving contact 33 can separate from the stationary contact 23 to complete the opening operation.

[0061] When the switch is closed again and the cabinet door 11 is opened, the adjusting rod 67 is no longer limited by the cabinet door 11. Under the action of the torsion spring between the fixed shaft 63 and the limiting pawl 64, the limiting pawl 64 drives the adjusting plate 65 to reverse. The adjusting plate 65 pushes the adjusting rod 67 to slide towards the outside of the switch cabinet body 1 through the synchronous connecting rod 66, and the limiting pawl 64 can then engage with the teeth on the synchronous ratchet 62 again.

[0062] It should be noted that all the devices in this application are common devices on the market, and can be selected according to the needs of specific use. The circuit connection relationship of each device is a simple series and parallel connection circuit. There is no innovation in the circuit connection part. Those skilled in the art can easily implement it. It belongs to the prior art and will not be described in detail.

[0063] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic grounding switch disconnection device for an electrical switchgear, comprising a switchgear body, a cabinet door hinged to one side of the switchgear body, an operating panel fixedly connected to the side of the switchgear body near the cabinet door, and an observation window provided on the cabinet door, characterized in that: A grounding switch body is fixedly connected to the main body of the switch cabinet, and an automatic disconnection component is provided below the grounding switch body; The automatic disconnection assembly includes an electric disconnection assembly and a manual disconnection assembly disposed below the grounding switch body. The manual disconnection assembly is rotatably connected inside the switch cabinet body, and the end of the manual disconnection assembly near the electric disconnection assembly is connected to the electric disconnection assembly. A limiting assembly for limiting the automatic disconnection assembly is rotatably connected to the grounding switch body. A control panel for controlling the opening and closing of the electric disconnection assembly is fixedly connected to the cabinet door. An operating hole communicating with the manual disconnection assembly is opened on the side of the cabinet door near the manual disconnection assembly. The grounding switch body includes a switch frame, which is fixedly connected to the inner wall of the switch cabinet body. Multiple sets of insulators are fixedly connected to the switch frame, and a stationary contact is fixedly connected to the end of each set of insulators away from the switch frame. The electric disconnecting assembly includes a rotary motor, which is fixedly connected to the inner wall of one side of the switch cabinet body. A rotating rod is fixedly connected to the output end of the rotary motor. Multiple sets of rotating shafts are rotatably connected to the rotating rod. The rotating rod is connected to the bottom of the switch frame through the multiple sets of rotating shafts. Multiple sets of moving contacts are also fixedly connected to the rotating rod, and the multiple sets of moving contacts are located directly below the multiple sets of insulators. A first bevel gear is also fixedly connected to one end of the rotating rod near the rotating motor. The first bevel gear meshes with the manual disconnection component and the limiting component respectively. The manual disconnection assembly includes a rotating head, which is rotatably connected to the operation panel. A synchronizing rod is fixedly connected to one end of the rotating head near the interior of the switch cabinet body, and a second bevel gear is fixedly connected to the other end of the synchronizing rod away from the rotating head. The second bevel gear meshes with the first bevel gear. The rotating head has a rotating hole at the end away from the synchronizing rod, and the rotating hole is connected to the operating hole on the cabinet door. The end of the rotating head away from the synchronizing rod is also fixedly connected to a synchronizing gear, and a lock hole blocking component is connected to the synchronizing gear.

2. The automatic disconnection device for grounding switch of electrical switchgear according to claim 1, characterized in that: The limiting component includes a third bevel gear, which is rotatably connected to the bottom of the switch frame and meshes with a first bevel gear. The top of the third bevel gear passes through the switch frame and extends to the top of the switch frame. A synchronous ratchet is fixedly connected to the extended end of the third bevel gear. A fixed shaft is also fixedly connected to the top of the switch frame near the synchronous ratchet. A limiting pawl is rotatably connected to the fixed shaft via a rotating shaft, and the limiting pawl engages with the teeth on the synchronous ratchet. A torsion spring is provided between the fixed shaft and the limiting pawl.

3. The automatic disconnection device for grounding switch of electrical switchgear according to claim 2, characterized in that: An adjusting plate is fixedly connected to the top of the limiting pawl, and a synchronous connecting rod is fixedly connected to the adjusting plate. One end of the synchronous connecting rod is rotatably connected to an adjusting connecting rod via a rotating shaft. The end of the adjusting connecting rod away from the synchronous connecting rod passes through and extends to the outside of the operating panel. A limiting frame is also fixedly connected to the side of the operating panel near the inside of the switch cabinet body, and the adjusting connecting rod is slidably connected to the limiting frame.

4. The automatic disconnection device for grounding switch of electrical switchgear according to claim 1, characterized in that: The main body of the switch cabinet is also provided with a lock body. The main body of the switch cabinet is fixed to the cabinet door by the lock body. A connecting hole is opened on the cabinet door that is connected to the lock hole of the lock body. The lock hole blocking component is disposed between the operating panel and the lock body.

5. The automatic disconnection device for grounding switch of electrical switchgear according to claim 4, characterized in that: The keyhole blocking assembly includes a blocking plate, which is slidably connected between the lock body and the operating plate. A connecting plate is fixedly connected to one side of the blocking plate, and a synchronous rack is fixedly connected to the bottom of the connecting plate. The synchronous rack meshes with a synchronous gear. An auxiliary frame is also fixedly connected to the side of the operating plate near the synchronous rack, and the synchronous rack is slidably connected within the auxiliary frame.

6. The automatic disconnection device for grounding switch of electrical switchgear according to claim 1, characterized in that: Two sets of positioning display boards are fixedly connected to one end of the synchronizing rod near the rotating head, and a display slot for displaying the positioning display board is fixedly connected to the operating plate.

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