Interlocking operation device for high voltage switch cabinet

Abstract

The utility model discloses an interlock operating device of high voltage switch cabinet, including composite switch mechanism, and composite switch mechanism includes ground operation section, closing operation section, switch button, interlock board and mechanical key interlock component, and the end of ground operation section is provided with ground operation section end face and the ground operation section convex portion that protrudes from ground operation section end face, and the end of closing operation section is provided with closing operation section end face and the closing operation section convex portion that protrudes from closing operation section end face, and interlock board includes rotary branch, sets up ground shielding section in rotary branch near one end of ground operation section and sets up closing shielding section in rotary branch near one end of closing operation section, and when ground operation section convex portion presses ground shielding section, closing shielding section will shield closing operation section end face, and when closing operation section convex portion presses closing shielding section, ground shielding section will shield ground operation section end face. The utility model discloses through setting up interlock board can realize preventing misoperation, and guarantee the security when overhauling.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage switchgear technology, and more specifically, to an interlocking operation device for high-voltage switchgear. Background Technology

[0002] Interlocking operating devices in high-voltage switchgear refer to those used in power systems for switching, controlling, or protecting power during generation, transmission, distribution, energy conversion, and consumption. These mainly include high-voltage circuit breakers, high-voltage disconnect switches and grounding switches, and high-voltage load switches. The high-voltage switchgear manufacturing industry is a crucial component of the power transmission and transformation equipment manufacturing industry, holding a very important position in the entire power industry.

[0003] In the operation of high-voltage switchgear, high-voltage current will exist inside the switchgear when it is tripped or not grounded after tripping. Therefore, it is necessary to set up interlocking devices to allow or prohibit certain operations, so as to ensure the prevention of misoperation during use and the safety during maintenance. Utility Model Content

[0004] This utility model overcomes the shortcomings of the prior art. Its structure is reasonably designed, and the interlocking plate can prevent misoperation and ensure safety during maintenance.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An interlocking operation device for a high-voltage switchgear includes a composite switch mechanism. The composite switch mechanism includes a grounding operation section, a closing operation section, a tripping button, an interlocking plate, and a mechanical key interlocking assembly. The end of the grounding operation section is provided with a grounding operation section end face and a grounding operation section protrusion protruding from the end face. The end of the closing operation section is provided with a closing operation section end face and a closing operation section protruding from the end face. The interlocking plate includes a rotating support, a grounding blocking section located at one end of the rotating support near the grounding operation section, and a closing blocking section located at one end of the rotating support near the closing operation section. When the grounding operation section protrusion presses against the grounding blocking section, the closing blocking section blocks the closing operation section end face; when the closing operation section protrusion presses against the closing blocking section, the grounding blocking section blocks the grounding operation section end face. An interlocking plate spring is connected to the interlocking plate.

[0007] By adopting the above technical solution, and by setting up an interlocking plate, the interlocking plate rotates due to the pressure of the protruding parts of the closing operation section or the grounding operation section. When the grounding operation section is operated to ground the switchgear, the grounding blocking section is pressed against the protruding part of the grounding operation section, while the closing blocking section blocks the closing operation section, preventing accidental closing operation during maintenance after grounding. Similarly, when the closing operation section is operated to close the switchgear, the closing blocking section is pressed against the protruding part of the closing operation section, causing the grounding blocking section to block the grounding operation section, preventing grounding operation without first opening the circuit breaker after closing. The interlocking plate spring provides a warning force. When the switchgear is in the open state, neither the protruding part of the closing operation section nor the protruding part of the grounding operation section is pressed against the interlocking plate. At this time, the interlocking plate spring keeps the interlocking plate in a stable position. The closing operation can be performed by inserting a special tool into the closing operation section, and the grounding operation can be performed by inserting a special tool into the grounding operation section.

[0008] Preferably, the composite switch mechanism further includes a mechanical key interlocking assembly, which includes a composite switch mechanical lock, a mechanical support rod linked to the composite switch mechanical lock, and a limit cover plate driven by the mechanical support rod that can block the closing operation section and restrict the action of the opening button.

[0009] By adopting the above technical solution and setting a mechanical lock for the composite switch, when the mechanical key is inserted into the mechanical lock of the composite switch, it can only be pulled out when the mechanical key is in a vertical position, and cannot be pulled out when the mechanical key is in a horizontal position. The limit cover can be moved to block the closing operation section and lock the opening button, thereby preventing misoperation.

[0010] Preferably, a locking plate is connected to the closing blocking section, and a locking hole is provided on the limit cover plate to cooperate with the locking plate. The locking plate can be inserted into the locking hole and lock the limit cover plate.

[0011] By adopting the above technical solution and setting it up in this way, the limiting cover can be locked by the locking plate, so that the limiting cover cannot be moved.

[0012] Preferably, a transmission plate is provided between the mechanical support rod and the limiting cover plate. The transmission plate is rotatably configured, and its two ends abut against the mechanical support rod and the limiting cover plate respectively. A buffer spring is connected to the limiting cover plate. A guide plate is provided on one side of the limiting cover plate. A guide structure is provided between the guide plate and the limiting cover plate. A limiting block is provided on the moving path of the limiting cover plate to restrict its movement.

[0013] By adopting the above technical solution, the mechanical support rod is moved upward, driving the transmission plate to rotate, thereby driving the limiting cover plate to move downward. Conversely, the downward movement of the mechanical support rod drives the limiting cover plate to move upward. The buffer spring provides the limiting cover plate with a buffering elastic force during movement, while the guide plate and guide structure provide the limiting cover plate with a good guiding effect during movement. The limiting block limits the limiting cover plate when it moves upward.

[0014] Preferably, the composite switch mechanism further includes a grounding knife linkage assembly. The grounding knife linkage assembly includes a grounding support rod that is linked to the grounding operation section, a hinged support rod that is connected to the grounding support rod, and a drive support rod that drives the grounding knife to rotate. The hinged support rod has a hinge fulcrum in the middle, one end of the hinged support rod is hinged to the grounding support rod, and the other end is hinged to the drive support rod.

[0015] By adopting the above technical solution, when the switchgear is grounded in the grounding operation section, the grounding operation section will drive the grounding support rod to move, thereby driving the hinged support rod to rotate and causing the drive support rod to move. The drive support rod will then drive the grounding switch to rotate and thus ground. This ensures that while the load switch in the switchgear is grounded, the grounding switch is also grounded at the same time as the grounding operation section is activated. The use of dual grounding switches in synchronous linkage and series voltage division, as well as the introduction of residual voltage after the switchgear is tripped into the ground, ensures the safety of the user.

[0016] Preferably, the grounding support rod is connected to an interlocking rod, the interlocking rod is connected to a cabinet door lock, and the cabinet door lock is equipped with a matching latch. The cabinet door lock can lock or unlock the latch. When the grounding knife is grounded, the cabinet door lock will unlock the latch.

[0017] By adopting the above technical solution, when the grounding support rod is activated, it will simultaneously drive the interlocking rod to activate, so that when the grounding switch is grounded, the cabinet door lock will unlock, making it easier to open the cabinet door for safe maintenance.

[0018] The beneficial effects of this utility model are:

[0019] This utility model has a reasonable structural design. By setting an interlocking plate, it can prevent misoperation and ensure safety during maintenance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram illustrating a specific embodiment of the present invention, showing the state where the closing operation section is blocked, the grounding operation section is exposed, and the locking plate locks the limit cover.

[0021] Figure 2 This is a schematic diagram illustrating the state of the closing operation section being exposed, the grounding operation section being blocked, and the locking piece being disengaged from the limit cover plate in a specific embodiment of this utility model.

[0022] Figure 3This is a schematic diagram illustrating the state of the grounding operation section being blocked, and the closing operation section and the opening button being blocked and limited by the limit cover plate in a specific embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram illustrating the structure of the composite switching mechanism in a specific embodiment of this utility model. Figure 1 ;

[0024] Figure 5 This is a schematic diagram illustrating the structure of the composite switching mechanism in a specific embodiment of this utility model. Figure 2 ;

[0025] Figure 6 This is a schematic diagram illustrating the structure of the mechanical key interlocking assembly according to a specific embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram illustrating the structure of the grounding switch connecting rod assembly according to a specific embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram illustrating the structure of the special tool according to a specific embodiment of the present invention.

[0028] In the diagram: a) Mechanical key; b) Special tool; 103) Grounding knife; 200) Composite switch mechanism; 35) Grounding operating section; 351) End face of grounding operating section; 352) Protrusion of grounding operating section; 45) Closing operating section; 451) End face of closing operating section; 452) Protrusion of closing operating section; 51) Tripping button; 6) Interlocking plate; 61) Rotating support; 62) Grounding shielding section; 63) Closing shielding section; 631) 64. Locking plate; 7. Interlocking plate spring; 8. Mechanical key interlocking assembly; 9. Composite switch mechanical lock; 10. Mechanical support rod; 11. Limiting cover plate; 12. Lock hole; 13. Transmission plate; 14. Buffer spring; 15. Guide plate; 16. Guide structure; 17. Limiting block; 18. Grounding knife connecting rod assembly; 19. Grounding support rod; 10. Hinged support rod; 11. Drive support rod; 22. Interlocking rod; 33. Cabinet door lock; 44. Locking buckle. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] like Figure 1-8As shown, an interlocking operation device for a high-voltage switchgear includes a composite switch mechanism 200. The composite switch mechanism 200 includes a grounding operation section 35, a closing operation section 45, a tripping button 51, an interlocking plate 6, and a mechanical key interlocking assembly 7. The end of the grounding operation section 35 is provided with a grounding operation section end face 351 and a grounding operation section protrusion 352 protruding from the grounding operation section end face 351. The end of the closing operation section 45 is provided with a closing operation section end face 451 and a closing operation section protrusion protruding from the closing operation section end face 451. Part 452, the interlocking plate 6 includes a rotating support 61, a grounding blocking section 62 located at one end of the rotating support 61 near the grounding operation section 35, and a closing blocking section 63 located at one end of the rotating support 61 near the closing operation section 45. When the protruding part 352 of the grounding operation section presses against the grounding blocking section 62, the closing blocking section 63 blocks the end face 451 of the closing operation section; when the protruding part 452 of the closing operation section presses against the closing blocking section 63, the grounding blocking section 62 blocks the end face 351 of the grounding operation section. An interlocking plate spring 64 is connected to the interlocking plate 6.

[0031] By adopting the above technical solution, and by setting an interlocking plate 6, the interlocking plate 6 rotates due to the pressure of the protruding part 452 of the closing operation section or the protruding part 352 of the grounding operation section. When the grounding operation section 35 is operated to ground the switchgear, the grounding blocking section 62 is pressed by the protruding part 352 of the grounding operation section, while the closing blocking section 63 blocks the closing operation section 45, preventing accidental closing operation during maintenance after grounding. Similarly, when the closing operation section 45 is operated to close the switchgear, the closing blocking section 63 is pressed by the protruding part 452 of the closing operation section, causing the grounding blocking section 62 to block the grounding operation section 35, preventing grounding operation without first opening the circuit breaker after closing. The interlocking plate spring 64 provides a warning force to the interlocking plate 6. When the switchgear is in the open state, neither the protruding part 452 of the closing operation section nor the protruding part 352 of the grounding operation section is pressed against the interlocking plate 6. At this time, the interlocking plate spring 64 keeps the interlocking plate 6 in a stable position. The closing operation can be performed by inserting the special tool b into the closing operation section 45, and the grounding operation can be performed by inserting the special tool b into the grounding operation section 35.

[0032] The composite switch mechanism 200 also includes a mechanical key interlocking assembly 7, which includes a composite switch mechanical lock 71, a mechanical support rod 72 linked to the composite switch mechanical lock 71, and a limit cover plate 73 driven by the mechanical support rod 72 to block the closing operation section 45 and restrict the operation of the opening button 51.

[0033] Furthermore, a locking piece 631 is connected to the closing blocking section 63, and a locking hole 731 that cooperates with the locking piece 631 is provided on the limiting cover plate 73. The locking piece 631 can be inserted into the locking hole 731 and lock the limiting cover plate 73. With this configuration, the limiting cover plate 73 can be locked by the locking piece 631, so that the limiting cover plate 73 cannot move.

[0034] A transmission plate 74 is provided between the mechanical support rod 72 and the limiting cover plate 73. The transmission plate 74 is rotatable, and its two ends abut against the mechanical support rod 72 and the limiting cover plate 73, respectively. A buffer spring 75 is connected to the limiting cover plate 73. A guide plate 76 is provided on one side of the limiting cover plate 73, and a guide structure 77 is provided between the guide plate 76 and the limiting cover plate 73. A limiting block 78 is provided on the moving path of the limiting cover plate 73 to restrict its movement. Thus, during operation... During operation, the mechanical support rod 72 is moved upward, causing the transmission plate 74 to rotate, thereby causing the limiting cover plate 73 to move downward. Conversely, the mechanical support rod 72 moves downward, causing the limiting cover plate 73 to move upward. The buffer spring 75 provides the limiting cover plate 73 with a buffering elastic force during movement. The guide plate 76 and guide structure 77 provide the limiting cover plate 73 with a good guiding effect during movement. The limiting block 78 limits the limiting cover plate 73 when it moves upward.

[0035] The composite switch mechanism 200 also includes a grounding switch linkage assembly 8. The grounding switch linkage assembly 8 includes a grounding support rod 81 linked to the grounding operation section 35, a hinged support rod 82 connected to the grounding support rod 81, and a drive support rod 83 that rotates the grounding switch 103. The hinged support rod 82 has a hinged fulcrum in the middle, one end of which is hinged to the grounding support rod 81, and the other end is hinged to the drive support rod 83. When the grounding operation section 35 is operated to ground the switchgear, the grounding operation section 35 will drive the grounding support rod 81 to move, thereby driving the hinged support rod 82 to rotate and causing the drive support rod 83 to move. The drive support rod 83 then drives the grounding switch 103 to rotate, thus grounding it. This ensures that while the grounding operation section 35 operates to ground the load switch in the switchgear, the grounding switch 103 is also grounded. The use of synchronous linkage of the two grounding switches, series voltage division, and the introduction of residual voltage after the switchgear tripping to the ground ensures user safety.

[0036] Furthermore, the grounding support rod 81 is connected to the interlocking rod 9, the interlocking rod 9 is connected to the cabinet door lock 91, and the cabinet door lock 91 is provided with a matching latch 93. The cabinet door lock 91 can lock or unlock the latch 93. When the grounding knife 103 is grounded, the cabinet door lock 91 unlocks the latch 93.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An interlocking operation device for a high-voltage switchgear, comprising a composite switching mechanism (200), characterized in that, The composite switch mechanism (200) includes a grounding operation section (35), a closing operation section (45), a tripping button (51), an interlocking plate (6), and a mechanical key interlocking assembly (7). The end of the grounding operation section (35) is provided with a grounding operation section end face (351) and a grounding operation section protrusion (352) protruding from the grounding operation section end face (351). The end of the closing operation section (45) is provided with a closing operation section end face (451) and a closing operation section protrusion (452) protruding from the closing operation section end face (451). The interlocking plate (6) includes a rotating support (6). 1) A grounding shielding section (62) is provided at one end of the rotating support (61) near the grounding operation section (35) and a closing shielding section (63) is provided at one end of the rotating support (61) near the closing operation section (45). When the protruding part (352) of the grounding operation section presses against the grounding shielding section (62), the closing shielding section (63) blocks the end face (451) of the closing operation section. When the protruding part (452) of the closing operation section presses against the closing shielding section (63), the grounding shielding section (62) blocks the end face (351) of the grounding operation section. An interlocking plate spring (64) is connected on the interlocking plate (6).

2. The interlocking operation device for a high-voltage switchgear according to claim 1, characterized in that, The composite switch mechanism (200) also includes a mechanical key interlocking assembly (7), which includes a composite switch mechanical lock (71), a mechanical support rod (72) linked to the composite switch mechanical lock (71), and a limit cover plate (73) driven by the mechanical support rod (72) that can block the closing operation section (45) and restrict the action of the opening button (51).

3. The interlocking operation device for a high-voltage switchgear according to claim 2, characterized in that, A locking plate (631) is connected to the closing blocking section (63), and a locking hole (731) that cooperates with the locking plate (631) is provided on the limit cover plate (73). The locking plate (631) can be inserted into the locking hole (731) and lock the limit cover plate (73).

4. The interlocking operation device for a high-voltage switchgear according to claim 3, characterized in that, A transmission plate (74) is provided between the mechanical support rod (72) and the limiting cover plate (73). The transmission plate (74) is rotatably set, and the two ends of the transmission plate (74) abut against the mechanical support rod (72) and the limiting cover plate (73) respectively. A buffer spring (75) is connected to the limiting cover plate (73).

5. The interlocking operation device for a high-voltage switchgear according to claim 2 or 3, characterized in that, The movement path of the limiting cover (73) is provided with a limiting block (78) that can restrict the movement of the limiting cover (73).

6. The interlocking operation device for a high-voltage switchgear according to claim 4, characterized in that, A guide plate (76) is provided on one side of the limiting cover plate (73), and a guide structure (77) is provided between the guide plate (76) and the limiting cover plate (73).

7. The interlocking operation device for a high-voltage switchgear according to claim 1, 2, 3, or 4, characterized in that, The composite switch mechanism (200) also includes a grounding knife linkage assembly (8), which includes a grounding support rod (81) linked to the grounding operation section (35), a hinged support rod (82) connected to the grounding support rod (81), and a drive support rod (83) that drives the grounding knife (103) to rotate. The hinged support rod (82) has a hinged fulcrum in the middle, one end of the hinged support rod (82) is hinged to the grounding support rod (81), and the other end is hinged to the drive support rod (83).

8. The interlocking operation device for a high-voltage switchgear according to claim 7, characterized in that, The grounding support rod (81) is connected to the interlocking rod (9), and the interlocking rod (9) is connected to the cabinet door lock (91). The cabinet door lock (91) is equipped with a matching latch (93). The cabinet door lock (91) can lock or unlock the latch (93). When the grounding knife (103) is grounded, the cabinet door lock (91) unlocks the latch (93).

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