Automatic breaking device for grounding switch of electrical switch cabinet

Abstract

The invention relates to the technical field of grounding switches, in particular to an electrical switch cabinet grounding switch automatic breaking device which comprises a switch cabinet body, a cabinet door is hinged to one side of the switch cabinet body through a hinge, an operation panel is fixedly connected to the side, close to the cabinet door, of the switch cabinet body, and an observation window is further arranged on the cabinet door. A grounding switch main body is fixedly connected in the switch cabinet main body, and an automatic breaking assembly is arranged below the grounding switch main body. When the device is used, after closing, the limiting pawl can clamp the synchronous ratchet wheel, stable clamping connection of the moving contact and the static contact is ensured, maintenance safety is guaranteed, closing and unlocking door opening are linked, the door can be opened only when closing is in place, safety and normalization are enhanced, after maintenance is completed, a cabinet door is closed, and limiting of the limiting pawl and the synchronous ratchet wheel is automatically relieved. And the door lock is linked with the internal structure, so that opening can only be performed after the cabinet door is closed and locked, the operation process is rigorous and orderly, and the safety and reliability of the electrical switch cabinet are comprehensively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of grounding switches, in particular to an automatic disconnecting device for a grounding switch in an electrical switch cabinet. Background Art

[0002] The grounding switch is an indispensable safety device in the power system. It is generally installed in the electrical switch cabinet and is electrically or mechanically interlocked with the circuit breaker to ensure that the grounding switch cannot be closed when the circuit breaker is closed, preventing live grounding accidents. When repairing electrical equipment or lines, the grounding switch can reliably ground the equipment or lines. Even if a sudden power outage occurs during the repair process, the current will be conducted to the earth through the grounding wire, forcing the protective device to trip, thereby preventing the repair personnel from suffering electric shock. The grounding switch interlocking structure is an important safety protection mechanism in electrical switchgear. It ensures that the operating sequence and status between the grounding switch and other electrical equipment (such as circuit breakers, disconnectors, etc.) comply with safety regulations through mechanical or electrical means, thereby preventing safety accidents caused by misoperation. Currently, the interlocking mechanisms of grounding switches are mainly manual and automatic. However, whether manual or automatic interlocking, their mechanical structures are relatively complex. During operation, the operator needs to be familiar with the interlocking logic and operating procedures. If the operator is unfamiliar or careless, it may cause misoperation, resulting in the disconnection of the moving contact and the static contact. When the operator is performing maintenance work, once the moving contact and the static contact are accidentally separated, it may cause a sudden interruption or abnormal flow of current, which may lead to dangerous situations such as electric shock, causing safety accidents.

[0003] Therefore, those skilled in the art provide an automatic disconnecting device for a grounding switch in an electrical switch cabinet to solve the problems raised in the above background technology. Summary of the Invention

[0004] The object of the present invention is to provide an automatic disconnecting device for a grounding switch of an electrical switch cabinet to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: An automatic disconnect device for an earthing switch in an electrical switch cabinet comprises a switch cabinet body, a cabinet door hingedly connected to one side of the switch cabinet body, an operating panel fixedly connected to a side of the switch cabinet body close to the cabinet door, an observation window further provided on the cabinet door, an earthing switch body fixedly connected to the switch cabinet body, and an automatic disconnect assembly provided below the earthing switch body; The automatic disconnecting assembly includes an electric disconnecting assembly and a manual disconnecting assembly arranged below the grounding switch body. The manual disconnecting assembly is rotatably connected to the switch cabinet body, and the end of the manual disconnecting assembly close to the electric disconnecting assembly is connected to the electric disconnecting assembly. A limit assembly for limiting the automatic disconnecting assembly is rotatably connected to the grounding switch body. A control panel for controlling the opening and closing of the electric disconnecting assembly is fixedly connected to the cabinet door. An operating hole connected to the manual disconnecting assembly is opened on the side of the cabinet door close to the manual disconnecting assembly.

[0006] Preferably, the grounding switch body includes a switch frame, which is fixedly connected to the inner wall of the switch cabinet body. Multiple groups of insulators are fixedly connected to the switch frame, and one end of each group of insulators away from the switch frame is fixedly connected to a static contact.

[0007] Preferably, the electric disconnect assembly includes a rotating motor, which is fixedly connected to the inner wall of one side of the switch cabinet body, and the output end of the rotating motor is fixedly connected to a rotating rod, which is rotatably connected to multiple sets of rotating shafts. The rotating rod is fixedly connected to the bottom of the switch frame through the multiple sets of rotating shafts, and the rotating rod is also fixedly connected to multiple sets of moving contacts, and the multiple sets of moving contacts are respectively located directly below the multiple sets of insulators; A first bevel gear is fixedly connected to one end of the rotating rod close to the rotating motor, and the first bevel gear is respectively engaged with the manual disconnecting component and the limiting component.

[0008] Preferably, the manual disconnect assembly includes a rotating head, the rotating head is rotatably connected to the operating panel, one end of the rotating head close to the interior of the switch cabinet body is fixedly connected to a synchronization rod, and the end of the synchronization rod away from the rotating head is fixedly connected to a second bevel gear, and the second bevel gear is meshed with the first bevel gear; A rotating hole is formed at one end of the rotating head away from the synchronization rod, and the rotating hole is connected to the operating hole on the cabinet door. A synchronization gear is fixedly connected to the end of the rotating head away from the synchronization rod, and a lock hole blocking component is connected to the synchronization gear.

[0009] Preferably: the limit assembly includes a third bevel gear, the third bevel gear is rotatably connected to the bottom of the switch frame, and the third bevel gear is meshed with the first bevel gear, the top of the third bevel gear passes through the switch frame and extends to the top of the switch frame, the extended end of the third bevel gear is fixedly connected to a synchronous ratchet, and the top of the switch frame near the synchronous ratchet is also fixedly connected to a fixed shaft, the fixed shaft is rotatably connected to a limit pawl via a rotating shaft, and the limit pawl is engaged with the teeth on the synchronous ratchet, and a torsion spring is provided between the fixed shaft and the limit pawl.

[0010] Preferably: the top of the limit pawl is also fixedly connected to an adjusting disk, the adjusting disk is fixedly connected to a synchronization link, one end of the top of the synchronization link is rotatably connected to the adjusting link through a rotating shaft, the end of the adjustment link away from the synchronization link passes through and extends to the outside of the operating panel, the side of the operating panel close to the inside of the switch cabinet body is also fixedly connected to a limit frame, and the adjustment link is slidably connected to the limit frame.

[0011] Preferably, a lock body is further provided in the switch cabinet body, the switch cabinet body is fixed to the cabinet door through the lock body, a connecting hole connected to the lock hole of the lock body is provided on the cabinet door, and the lock hole shielding assembly is provided between the operating panel and the lock body.

[0012] Preferably: the keyhole shielding assembly includes a shielding plate, which is slidably connected between the lock body and the operating panel, one side of the shielding plate is fixedly connected to a connecting plate, the bottom of the connecting plate is fixedly connected to a synchronization rack, the synchronization rack is meshed with a synchronization gear, and the side of the operating panel close to the synchronization rack is also fixedly connected to an auxiliary frame, and the synchronization rack is slidably connected in the auxiliary frame.

[0013] Preferably, two groups of in-place display boards are fixedly connected to one end of the synchronization rod close to the rotating head, and a display slot for displaying the in-place display boards is fixedly connected to the cabinet door.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. When the present invention is in use, after the closing is completed, the limit pawl is engaged with the teeth of the synchronous ratchet, so that the synchronous ratchet cannot rotate, thereby fixing the third bevel gear. Since the third bevel gear is engaged with the first bevel gear, the first bevel gear is also unable to rotate, which ensures that the moving contact always remains in a state of engagement with the static contact. When the operator is performing maintenance work, it can effectively prevent the moving contact and the static contact from accidentally opening the circuit breaker, providing reliable safety protection for the maintenance personnel, avoiding dangerous situations such as electric shock caused by incorrect opening of the circuit breaker, and greatly reducing the safety risks during the maintenance process.

[0015] 2. In the present invention, when the rotating rod drives the synchronous rod to rotate, the synchronous gear rotates synchronously, pushing the synchronous rack to slide upward in the auxiliary frame, and then drives the baffle plate to move upward synchronously through the connecting plate, so that the baffle plate is moved away from the lock hole of the lock body. After the closing is completed, the baffle plate is completely removed, and the operator can insert the key into the lock hole of the lock body through the connecting hole to unlock and open the cabinet door. This linkage design makes the closing and unlocking door opening operations closely related. The door opening operation can only be performed after the closing is in place, further enhancing the safety of the equipment and the standardization of operation.

[0016] 3. In the present invention, when the opening operation is performed after the maintenance is completed, the cabinet door will push the adjusting link to move during the closing process, so that the adjusting link pushes the adjusting disk to rotate, causing 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 with the limit pawl and can rotate smoothly. At this time, starting the rotating motor can drive the rotating rod to rotate, thereby separating the moving contact and the static contact to complete the opening work. This automatic release of the limit mechanism makes the opening operation smoother and more efficient. At the same time, the linkage design of the door lock and the internal mechanical structure of the switch cabinet ensures that the opening 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the first viewing angle of the present invention; Figure 2 This is a schematic diagram of the structure inside the switch cabinet body of the present invention; Figure 3 The structure diagram of the grounding switch body and the electric disconnect assembly in the present invention is shown in FIG. Figure 1 ; Figure 4 The structure diagram of the grounding switch body and the electric disconnect assembly in the present invention is shown in FIG. Figure 2 ; Figure 5 For the present invention Figure 4 An enlarged schematic diagram of the structure at position B above; Figure 6 Schematic diagram of the structure of the keyhole shielding assembly of the present invention; Figure 7 Schematic diagram of the structure of the limit assembly in the present invention; Figure 8 For the present invention Figure 1 A magnified schematic diagram of the structure at point A above.

[0018] Figure: 1. Switchgear body; 11. Cabinet door; 12. Observation window; 13. Operation hole; 14. Communication hole; 15. Control panel; 16. Display slot; 17. Operation panel; 18. Lock body; 2. Earthing switch body; 21. Switch frame; 22. Insulator; 23. Static contact; 3. Electric disconnect assembly; 31. Rotating motor; 32. Rotating rod; 33. Moving contact; 34. First bevel gear; 4. Manual disconnect assembly; 4 1. Rotating head; 42. Rotating hole; 43. Synchronizing rod; 44. Second bevel gear; 45. In-position display board; 46. Synchronizing gear; 5. Keyhole shielding assembly; 51. Shielding 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 disk; 66. Synchronizing connecting rod; 67. Adjusting connecting rod. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0021] For example 1, please refer to Figure 1-8 An automatic disconnect device for an earthing switch in an electrical switch cabinet includes a switch cabinet body 1. A cabinet door 11 is hingedly connected to one side of the switch cabinet body 1. An operating panel 17 is fixedly connected to the side of the switch cabinet body 1 near the cabinet door 11. The cabinet door 11 is also provided with an observation window 12. A grounding switch body 2 is fixedly connected to the switch cabinet body 1. An automatic disconnect assembly is provided below the grounding switch body 2. A lock body 18 is also provided in the switch cabinet body 1. The switch cabinet body 1 is fixed to the cabinet door 11 through the lock body 18. A connecting hole 14 is provided on the cabinet door 11 and is connected to 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 disconnect assembly includes an electric disconnect assembly 3 provided below the grounding switch body 2. and a manual disconnect assembly 4, the manual disconnect assembly 4 is rotatably connected to the switch cabinet body 1, and the end of the manual disconnect assembly 4 close to the electric disconnect assembly 3 is connected to the electric disconnect assembly 3, the grounding switch body 2 is rotatably connected to a limit assembly 6 for limiting the automatic disconnect assembly, the cabinet door 11 is fixedly connected to a control panel 15 for controlling the opening and closing of the electric disconnect assembly 3, and an operating hole 13 connected to the manual disconnect assembly 4 is opened on the side of the cabinet door 11 close to the manual disconnect assembly 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. A plurality of groups of insulators 22 are fixedly connected to the switch frame 21, and a static contact 23 is fixedly connected to the end of each group of insulators 22 away from the switch frame 21; Specifically, during use, when the grounding switch body 2 needs to be closed or opened, the electric disconnecting assembly 3 can be started through the control panel 15, and the grounding switch body 2 is closed or opened by the electric disconnecting assembly 3. When the electric disconnecting assembly 3 is started to close, the electric disconnecting assembly 3 simultaneously drives the lock hole shielding assembly 5 to start through the manual disconnecting assembly 4, so that the lock hole shielding assembly 5 is moved away from the lock hole of the lock body 18, so that the lock hole is exposed. When the grounding switch body 2 completes the closing work, the lock hole shielding assembly 5 is completely moved away from the lock hole, so that the lock hole is completely exposed. The staff uses the key to insert the key into the lock hole of the lock body 18 through the connecting hole 14, and the lock body 18 can be unlocked, so that the cabinet door 11 is opened, which is convenient for maintenance and other work. When the grounding switch body 2 completes the closing operation, the electric disconnect assembly 3 is fixed under the limit of the limit assembly 6. At this time, the grounding switch body 2 cannot be opened manually or electrically, avoiding the safety hazard caused by the operator's misoperation that causes the grounding switch body 2 to open when the cabinet door 11 is opened.

[0022] In this embodiment, the electric disconnect assembly 3 includes a rotating motor 31, which is fixedly connected to the inner wall of one side of the switch cabinet body 1. The output end of the rotating motor 31 is fixedly connected to a rotating rod 32, and multiple sets of rotating shafts are rotatably connected to the rotating rod 32. The rotating rod 32 is fixedly connected to the bottom of the switch frame 21 through the multiple sets of rotating shafts. The rotating rod 32 is also fixedly connected to multiple sets of moving contacts 33, and the multiple sets of moving contacts 33 are respectively located directly below the multiple sets of insulators 22. The rotating rod 32 is also fixedly connected to the end of the rotating rod 32 close to the rotating motor 31. A first bevel gear 34 is also fixedly connected. The first bevel gear 34 is respectively engaged with the manual disconnect assembly 4 and the limit assembly 6; Specifically, when performing the closing operation, the rotating motor 31 is first started through the control panel 15. The rotating motor 31 drives the rotating rod 32 to rotate, and the rotating rod 32 simultaneously drives the multiple sets of moving contacts 33 to rotate, so that the multiple sets of moving contacts 33 are respectively engaged with the static contacts 23 on the insulator 22, completing the closing operation; After the maintenance is completed and the cabinet door 11 is closed, the rotating motor 31 is started again, so that the rotating motor 31 drives the rotating rod 32 to reverse, so that the moving contact 33 is separated from the static contact 23, and the circuit breaker is opened.

[0023] In this embodiment, the manual disconnecting assembly 4 includes a rotating head 41, which is rotatably connected to the operating panel 17. One end of the rotating head 41 close to the interior of the switch cabinet body 1 is fixedly connected to a synchronization rod 43, and one end of the synchronization rod 43 away from the rotating head 41 is fixedly connected to a second bevel gear 44, which meshes with the first bevel gear 34. A rotating hole 42 is provided at the end of the rotating head 41 away from the synchronization rod 43, and the rotating hole 42 is connected to the operating hole 13 on the cabinet door 11. The end of the rotating head 41 away from the synchronization rod 43 is also fixedly connected to a synchronization gear 46, which is connected to the lock hole blocking assembly 5. Two sets of in-place display boards 45 are also fixedly connected to the end of the synchronization rod 43 close to the rotating head 41, and a display slot 16 for displaying the in-place display boards 45 is fixedly connected to the cabinet door 11; Specifically, when manually closing or opening the switch, first use a tool to insert it into the operating hole 13, so that the tool is inserted into the rotary hole 42, and the rotating tool drives the rotating head 41 to rotate, so that the rotating head 41 drives the synchronous rod 43 to rotate. When the synchronous rod 43 rotates, the synchronous rod 43 simultaneously drives the second bevel gear 44 to rotate. The second bevel gear 44 meshes with the first bevel gear 34 and drives the first bevel gear 34 to rotate, so that the rotating rod 32 rotates, and the rotating rod 32 drives the moving contact 33 to rotate to achieve the closing operation; When opening the switch, insert the tool into the rotating hole 42 and rotate it in the reverse direction, so that the rotating head 41 drives the synchronous rod 43 to rotate in the reverse direction, separating the moving contact 33 from the static contact 23, thereby opening the switch. When the cabinet door 11 is in the closed state and the synchronization rod 43 rotates to close the switch, the synchronization rod 43 simultaneously drives the in-place display board 45 to rotate, so that the in-place display board 45 that originally displayed the open state is moved away from the display slot 16. When the switch is closed in place, the in-place display board 45 that originally displayed the closed state on the synchronization rod 43 moves to the display slot 16, and it is possible to intuitively observe whether the closing or opening state is in place through the observation window 12 provided on the cabinet door 11.

[0024] In this embodiment, the limiting assembly 6 includes a third bevel gear 61, which is rotatably connected to the bottom of the switch frame 21, and the third bevel gear 61 is meshed 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. The extended end of the third bevel gear 61 is fixedly connected to a synchronous ratchet 62. The top of the switch frame 21 near the synchronous ratchet 62 is also fixedly connected to a fixed shaft 63. The fixed shaft 63 is rotatably connected to a limiting pawl 64 through a rotating shaft, and the limiting pawl 64 is connected to the synchronous ratchet 62. The teeth on the step ratchet 62 are engaged with each other, and a torsion spring is provided between the fixed shaft 63 and the limit pawl 64. The top of the limit pawl 64 is also fixedly connected to an adjusting disk 65, and the adjusting disk 65 is fixedly connected to a synchronization link 66. One end of the top of the synchronization link 66 is rotatably connected to an adjustment link 67 through a rotating shaft. The end of the adjustment link 67 away from the synchronization link 66 passes through and extends to the outside of the operating panel 17. The side of the operating panel 17 close to the inside of the switch cabinet body 1 is also fixedly connected to a limit frame, and the adjustment link 67 is slidably connected to the limit frame; When the electric disconnect assembly 3 or the manual disconnect assembly 4 is used for closing and opening operations, when the rotating 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 the circuit breaker is closed, the teeth on the synchronous ratchet 62 continuously push the limit pawl 64, and the limit pawl 64 passes 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 the circuit breaker is closed; When the circuit breaker is closed, the limiting pawl 64 is engaged with the teeth of the synchronous ratchet 62, so that the synchronous ratchet 62 cannot rotate, thereby fixing the third bevel gear 61. Since the third bevel gear 61 is meshed with the first bevel gear 34, when the third bevel gear 61 is fixed, the first bevel gear 34 is also unable to rotate, so that the moving contact 33 always remains engaged with the static contact 23, ensuring that the moving contact 33 and the static contact 23 will not be opened when the operator is performing maintenance, thereby ensuring the safety of the operator during maintenance; When the inspection is completed, the cabinet door 11 is closed, and the switch cabinet body 1 and the cabinet door 11 are fixed by the lock body 18. During the closing process of the cabinet door 11, the cabinet door 11 continuously pushes the adjustment link 67 to move, so that the adjustment link 67 slides toward the inside of the switch cabinet body 1. When the adjustment link 67 slides, the adjustment disk 65 is pushed to rotate through the synchronous link 66. The adjustment disk 65 drives the limit pawl 64 to flip, so that the limit pawl 64 is disengaged 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. When the cabinet door 11 is locked with the switch cabinet body 1, the rotating motor 31 is started to drive the rotating rod 32 to rotate. The third bevel gear 61 and the synchronous ratchet 62 are no longer engaged by the limiting 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 static contact 23 to complete the opening operation. When the switch is closed again and the cabinet door 11 is opened, the adjusting link 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 disk 65 to reverse, and the adjusting disk 65 pushes the adjusting link 67 to slide toward the outside of the switch cabinet body 1 through the synchronous link 66, and the limiting pawl 64 can be engaged with the teeth on the synchronous ratchet 62 again.

[0025] In this embodiment, the keyhole shielding assembly 5 includes a shielding 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 shielding plate 51, and a synchronization rack 53 is fixedly connected to the bottom of the connecting plate 52. The synchronization rack 53 is engaged with the synchronization gear 46. An auxiliary frame 54 is also fixedly connected to the side of the operating plate 17 near the synchronization rack 53. The synchronization rack 53 is slidably connected to the auxiliary frame 54. Before the closing operation is performed, the baffle plate 51 blocks the lock hole of the lock body 18. When the rotating rod 32 rotates to drive the moving contact 33 to close the circuit, the first bevel gear 34 simultaneously drives the synchronization rod 43 to rotate, causing the synchronization gear 46 to rotate synchronously. When the synchronization gear 46 rotates, it pushes the synchronization rack 53 to slide upward in the auxiliary frame 54. The synchronization rack 53 drives the baffle plate 51 to move upward synchronously through the connecting plate 52, so that the baffle plate 51 is removed from the lock hole of the lock body 18. When the closing is completed, the baffle 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, so that the cabinet door 11 is opened, which is convenient for maintenance and other work.

[0026] The working principle of the present invention is: When performing electric closing, first start the rotating motor 31 through the control panel 15, and the rotating motor 31 drives the rotating rod 32 to rotate, and the rotating rod 32 simultaneously drives the multiple sets of moving contacts 33 to rotate, so that the multiple sets of moving contacts 33 are respectively engaged with the static contacts 23 on the insulator 22, completing the closing work. When the rotating rod 32 rotates, the rotating rod 32 drives the second bevel gear 44 and the synchronization rod 43 to rotate through the first bevel gear 34, and the synchronization rod 43 simultaneously drives the in-place display board 45 to rotate, so that the in-place display board 45 that originally displayed the opening state is moved away from the display slot 16. When the closing is in place, the in-place display board 45 that displays the closing state on the synchronization rod 43 moves to the display slot 16. Through the observation window 12 provided on the cabinet door 11, it is possible to intuitively observe whether the closing or opening is in place. When the rotary motor 31 drives the first bevel gear 34 to rotate, the first bevel gear 34 also 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 limit pawl 64, and the limit pawl 64 passes 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; When the circuit breaker is closed, the limiting pawl 64 is engaged with the teeth of the synchronous ratchet 62, so that the synchronous ratchet 62 cannot rotate, thereby fixing the third bevel gear 61. Since the third bevel gear 61 is meshed with the first bevel gear 34, when the third bevel gear 61 is fixed, the first bevel gear 34 is also unable to rotate, so that the moving contact 33 always remains engaged with the static contact 23, ensuring that the moving contact 33 and the static contact 23 will not be opened when the operator is performing maintenance, thereby ensuring the safety of the operator during maintenance; When the rotating rod 32 drives the synchronization rod 43 to rotate, the synchronization gear 46 rotates synchronously. When the synchronization gear 46 rotates, it pushes the synchronization rack 53 to slide upward in the auxiliary frame 54. The synchronization rack 53 drives the shielding plate 51 to move upward synchronously through the connecting plate 52, so that the shielding plate 51 is removed from the lock hole of the lock body 18. When the switch is closed, the shielding 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. When performing manual closing, a tool is inserted into the operating hole 13 so that the tool is inserted into the rotary hole 42. The rotating tool drives the rotating head 41 to rotate, so that the rotating head 41 drives the synchronous rod 43 to rotate. When the synchronous rod 43 rotates, the synchronous rod 43 simultaneously drives the second bevel gear 44 to rotate. The second bevel gear 44 meshes with the first bevel gear 34 and drives the first bevel gear 34 to rotate, so that the rotating rod 32 rotates. The rotating rod 32 drives the moving contact 33 to rotate to achieve the closing operation. When the maintenance is completed and the switch is opened, the cabinet door 11 is first closed, and the switch cabinet body 1 and the cabinet door 11 are fixed by the lock body 18. During the closing process of the cabinet door 11, the cabinet door 11 continuously pushes the adjustment link 67 to move, so that the adjustment link 67 slides toward the inside of the switch cabinet body 1. When the adjustment link 67 slides, the adjustment disk 65 is rotated through the synchronous link 66. The adjustment disk 65 drives the limit pawl 64 to flip, so that the limit pawl 64 is disengaged 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. When the cabinet door 11 is locked with the switch cabinet body 1, the rotating motor 31 is started to drive the rotating rod 32 to rotate. The third bevel gear 61 and the synchronous ratchet 62 are no longer engaged by the limiting 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 static contact 23 to complete the opening operation. When the switch is closed again and the cabinet door 11 is opened, the adjusting link 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 disk 65 to reverse, and the adjusting disk 65 pushes the adjusting link 67 to slide toward the outside of the switch cabinet body 1 through the synchronous link 66, and the limiting pawl 64 can be engaged with the teeth on the synchronous ratchet 62 again.

[0027] It should be noted that the various devices in this application are common devices in the market, and can be selected according to specific needs during 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 implement it relatively easily. It belongs to the existing technology and will not be elaborated on.

[0028] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An automatic disconnect device for an earthing switch in an electrical switch cabinet, comprising a switch cabinet body, a cabinet door hingedly connected to one side of the switch cabinet body, an operating panel fixedly connected to the side of the switch cabinet body adjacent to the cabinet door, and an observation window provided on the cabinet door, characterized in that: A grounding switch body is fixedly connected to the switch cabinet body, and an automatic disconnecting assembly is provided below the grounding switch body; The automatic disconnecting assembly includes an electric disconnecting assembly and a manual disconnecting assembly arranged below the grounding switch body. The manual disconnecting assembly is rotatably connected to the switch cabinet body, and the end of the manual disconnecting assembly close to the electric disconnecting assembly is connected to the electric disconnecting assembly. A limit assembly for limiting the automatic disconnecting assembly is rotatably connected to the grounding switch body. A control panel for controlling the opening and closing of the electric disconnecting assembly is fixedly connected to the cabinet door. An operating hole connected to the manual disconnecting assembly is opened on the side of the cabinet door close to the manual disconnecting assembly.

2. The automatic disconnecting device for the grounding switch of an electrical switch cabinet according to claim 1, characterized in that: The grounding switch body includes a switch frame, which is fixedly connected to the inner wall of the switch cabinet body. Multiple groups of insulators are fixedly connected to the switch frame, and one end of each group of insulators away from the switch frame is fixedly connected to a static contact.

3. The automatic disconnecting device for the grounding switch of an electrical switch cabinet according to claim 2, characterized in that: The electric disconnect assembly includes a rotating motor, which is fixedly connected to the inner wall of one side of the switch cabinet body. The output end of the rotating motor is fixedly connected to a rotating rod, and the rotating rod is rotatably connected to multiple sets of rotating shafts. The rotating rod is fixedly connected to the bottom of the switch frame through the multiple sets of rotating shafts. The rotating rod is also fixedly connected to multiple sets of moving contacts, and the multiple sets of moving contacts are respectively located directly below the multiple sets of insulators. A first bevel gear is fixedly connected to one end of the rotating rod close to the rotating motor, and the first bevel gear is respectively engaged with the manual disconnecting component and the limiting component.

4. The automatic disconnecting device for the grounding switch of an electrical switch cabinet according to claim 3, characterized in that: The manual disconnect assembly includes a rotating head, which is rotatably connected to the operating panel. One end of the rotating head close to the interior of the switch cabinet body is fixedly connected to a synchronization rod, and the other end of the synchronization rod away from the rotating head is fixedly connected to a second bevel gear, which is meshed with the first bevel gear. A rotating hole is formed at one end of the rotating head away from the synchronization rod, and the rotating hole is connected to the operating hole on the cabinet door. A synchronization gear is fixedly connected to the end of the rotating head away from the synchronization rod, and a lock hole blocking component is connected to the synchronization gear.

5. The automatic disconnecting device for the grounding switch of an electrical switch cabinet according to claim 3, characterized in that: The limiting assembly includes a third bevel gear, which is rotatably connected to the bottom of the switch frame and meshes with the first bevel gear. The top of the third bevel gear passes through the switch frame and extends to the top of the switch frame. The extended end of the third bevel gear is fixedly connected to a synchronous ratchet. A fixed shaft is also fixedly connected to the side of the top of the switch frame close to the synchronous ratchet. The fixed shaft is rotatably connected to a limiting pawl via a rotating shaft, and the limiting pawl is engaged with the teeth on the synchronous ratchet. A torsion spring is provided between the fixed shaft and the limiting pawl.

6. The automatic disconnecting device for the grounding switch of an electrical switch cabinet according to claim 5, characterized in that: The top of the limit pawl is also fixedly connected to an adjusting disk, and the adjusting disk is fixedly connected to a synchronization link. One end of the top of the synchronization link is rotatably connected to the adjusting link through a rotating shaft. The end of the adjustment link away from the synchronization link passes through and extends to the outside of the operating panel. The side of the operating panel close to the inside of the switch cabinet body is also fixedly connected to a limit frame, and the adjustment link is slidably connected to the limit frame.

7. The automatic disconnecting device for the grounding switch of an electrical switch cabinet according to claim 4, characterized in that: A lock body is also provided in the switch cabinet body, and the switch cabinet body is fixed to the cabinet door through the lock body. A connecting hole connected to the lock hole of the lock body is provided on the cabinet door, and the lock hole shielding component is provided between the operating panel and the lock body.

8. The automatic disconnecting device for the grounding switch of an electrical switch cabinet according to claim 7, characterized in that: The keyhole shielding assembly includes a shielding plate, which is slidably connected between the lock body and the operating panel. A connecting plate is fixedly connected to one side of the shielding plate, and a synchronization rack is fixedly connected to the bottom of the connecting plate. The synchronization rack is meshed with a synchronization gear. An auxiliary frame is also fixedly connected to the side of the operating panel close to the synchronization rack, and the synchronization rack is slidably connected in the auxiliary frame.

9. The automatic disconnecting device for the grounding switch of an electrical switch cabinet according to claim 4, characterized in that: Two groups of in-place display boards are fixedly connected to one end of the synchronization rod close to the rotating head, and a display slot for displaying the in-place display boards is fixedly connected to the cabinet door.

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