Switch room interlocking mechanism and grounding knife interlocking mechanism

Abstract

The invention discloses a switch room interlocking mechanism and a grounding knife interlocking mechanism, and belongs to the field of power distribution equipment. Comprising a contactor cabinet and a first interlocking mechanism arranged in a shell, the first interlocking mechanism comprises a grounding knife operation shaft and a linkage shaft in meshing transmission with a bevel gear at the end of the grounding knife operation shaft, and a first linkage plate of a triangular structure is fixed on the linkage shaft; the first linkage plate serves as a transmission center and drives the second interlocking mechanism and the third interlocking mechanism through the connecting rod assembly, and the state of the grounding switch is converted into mechanical locking of a front lower door and a rear lower door. The device also comprises a second locking assembly which directly drives a locking rod to deflect and tilt through the movement of a grounding switch operation hole shielding plate so as to block the handcart. According to the switch chamber interlocking mechanism and the grounding knife interlocking mechanism, through rigid reversing of the bevel gear and shunting of the triangular linkage plate, forced synchronization of locking of the grounding switch and the front and rear cabinet doors is realized, and through active linkage of the shielding plate and the locking rod, safety logic of locking operation is formed, and equipment safety is improved.

Description

Technical Field

[0001] This invention relates to the field of power distribution equipment technology, and in particular to switch room interlocking mechanisms and grounding switch interlocking mechanisms. Background Technology

[0002] In armored withdrawable AC metal-enclosed switchgear, to prevent operators from accidentally entering a live compartment while it is not de-energized and grounded, a strict mechanical interlock device is usually installed between the operating shaft of the grounding switch and the cabinet door leading to the cable compartment. The core logic is that the cabinet door is only allowed to open when the grounding switch is closed; when the grounding switch is open, the cabinet door must be forcibly locked.

[0003] For example, patent CN110993420B discloses a safety interlocking device for a switchgear, including an operating shaft, a rear door interlocking mechanism, and a front lower door interlocking mechanism. The rear door interlocking mechanism mainly includes a locking rod, a locking hook, and an elastic pressing mechanism, which work in conjunction with a stop on the operating shaft. The front lower door interlocking mechanism mainly includes a lifting rod, a lock plate with a locking groove, and an elastic reset mechanism, which works in conjunction with a cam on the operating shaft. This device uses the stop on the operating shaft to limit the locking rod's reset to maintain the rear door locking, and the rotation of the operating shaft drives the cam to press the lifting rod, driving the lock plate to move vertically and reset in conjunction with the elastic mechanism, thereby realizing the engagement and disengagement of the front lower door locking pin.

[0004] Although the aforementioned existing technologies have achieved interlocking between the grounding switch and the front and rear doors to a certain extent, their interlocking logic relies on the reset force of the elastic element and the indirect passive blocking structure. If the spring experiences metal fatigue, corrosion, or breakage, or if the transmission rod becomes stuck due to dust accumulation and deformation, the lock may fail to return to its original position, leading to false locking of the cabinet door or interlocking failure. Furthermore, the transmission systems of the front lower door and the rear door are independent and dispersed. The front lower door relies on a cam to drive the lifting rod for vertical movement, while the rear door relies on a stop block to limit the displacement of the horizontal rod. Not only are their movement forms different, but their physical positions are also far apart. The lack of a unified and rigid transmission hub for mechanical connection results in poor synchronization of the front and rear door movements, increasing the difficulty of equipment debugging and maintenance.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0006] The present invention provides a switch room interlocking mechanism and a ground switch interlocking mechanism to solve the technical problems in the prior art where the interlocking logic relies on the reset of elastic elements and passive blocking, resulting in insufficient reliability, and the front and rear door transmission systems are dispersed, resulting in poor action synchronization.

[0007] The present invention adopts the following technical solution: a switch room interlocking mechanism and a grounding switch interlocking mechanism, mainly including a contactor cabinet, which has a shell, with a front middle partition at both ends of the inner wall of the shell, and a pull-out partition below the front middle partition; a first interlocking mechanism, which is disposed in the shell, the first interlocking mechanism includes a driving part and a linkage part that is driven by the driving part, the driving part including a grounding switch operating shaft for driving the opening and closing of the grounding switch and a bevel gear fixed to the end of the grounding switch operating shaft; the linkage part includes a linkage shaft arranged perpendicular to the grounding switch operating shaft, a bevel gear two that meshes with the bevel gear one on the linkage shaft, and a linkage plate one fixedly sleeved on the linkage shaft; a second interlocking mechanism, which is mechanically connected to the linkage plate one through a connecting rod assembly, and is driven by The system is configured to use the rotation of the first linkage plate to convert the open / closed state of the grounding switch into a mechanical lock on the front lower door; the third interlocking mechanism, which is mechanically connected to the first linkage plate via the second linkage assembly, is configured to use the rotation of the first linkage plate to convert the open / closed state of the grounding switch into a mechanical lock on the rear lower door; wherein, the first linkage plate has a triangular structure design, serving as a unified transmission hub to simultaneously drive the second and third interlocking mechanisms to operate synchronously; the second locking assembly includes a locking rod movably mounted on the first front middle partition plate, and a baffle plate slidably mounted on the pull-out partition plate, the pull-out partition plate having an operating hole; the baffle plate is configured to drive the locking rod to displace and block the vacuum contactor trolley from moving when the operating hole is exposed.

[0008] Furthermore, the linkage plate is provided with an eccentrically arranged protruding shaft, and the first interlocking mechanism also includes a connecting rod and a connecting rod. One end of the connecting rod is movably sleeved on the protruding shaft, and the other end is movably connected to one end of the connecting rod, forming a rigid transmission chain that transmits the rotational motion of the linkage plate outward.

[0009] Furthermore, it also includes a rotating part, which includes a mounting component, a movable shaft, a connecting block, a third connecting rod, a support frame, a central shaft, and an operation indicator. The mounting component and the support frame are fixed to a tray provided on the side of the pull-out partition. The movable shaft is rotatably connected to the mounting component and movably connected to the end of the second connecting rod away from the first connecting rod. The connecting block is fixedly mounted on the movable shaft. One end of the third connecting rod is movably connected to the connecting block, and the other end is movably connected to the operation indicator. The operation indicator is rotatably mounted on the central shaft of the support frame so that the rotation of the ground knife operating shaft drives the operation indicator to switch the status display.

[0010] Furthermore, the second interlocking mechanism includes a guide bracket, a bent plate, a vertical plate, an embedded shaft, and the first linkage assembly; the first linkage assembly includes a first linkage, a second linkage, a connector, and a movable shaft; one end of the first linkage is connected to the first linkage plate, and the other end is connected to the second linkage, and the second linkage drives the movable shaft to rotate through the connector; the guide bracket is fixed to the side of the support frame, the bent plate is slidably disposed on the guide bracket, one end of the bent plate is provided with a blocking end suitable for blocking the opening of the lower front door, and the other end is provided with a slot, the vertical plate is fixedly disposed on the movable shaft, and the embedded shaft is fixedly disposed on the vertical plate. When the grounding switch is in the open state, the movable shaft drives the vertical plate to rotate, so that the embedded shaft is embedded in the slot, restricting the sliding of the bent plate, and keeping the blocking end in the opening path of the lower front door.

[0011] Furthermore, the third interlocking mechanism includes a locking rod, a reverse locking plate, and the second connecting rod assembly; the second connecting rod assembly includes a right-angle piece, a connecting rod six, a connecting rod seven, a bracket one, and a connecting rod five; the locking rod is installed on the inner side of the lower rear door, the middle part of the connecting rod seven is rotatably connected to the bracket one fixed on the outer shell, one end of the connecting rod seven is provided with a waist groove two, the waist groove two is movably sleeved on the protruding shaft of the linkage plate one, the connecting rod six slides through the right-angle piece fixed on the outer shell, and its two ends are respectively connected to the connecting rod seven and the connecting rod five, the connecting rod five drives the reverse locking plate to move, so that the reverse locking plate and the locking rod cooperate to lock or disengage.

[0012] Furthermore, the second locking assembly also includes a guide seat and a fulcrum seat fixed to the first front partition plate. One end of the locking rod is limited by the fulcrum seat to form a rotation fulcrum, and the other end is movably constrained within the guide seat. The baffle plate has an upwardly extending protrusion. The first front partition plate has a slot through which the protrusion passes. The linkage between the baffle plate and the locking rod is configured such that when the baffle plate moves, the protrusion pushes against one end of the locking rod by passing through the slot, causing the locking rod to deflect and tilt with the fulcrum seat as the fulcrum.

[0013] Furthermore, the second locking component also includes a locking part 1 disposed on the first front partition plate. The first locking part includes a concave frame fixed on the first front partition plate and an interlocking plate 2 rotatably disposed within the concave frame. The second interlocking plate is configured to remain in the initial position under the action of elastic force and cooperate with the concave frame to position the main shaft nut of the vacuum contactor handcart, forming a double lock with the physical obstruction of the locking rod.

[0014] Furthermore, a valve interlocking mechanism is provided on the front central partition. The valve interlocking mechanism includes a valve guide rod, a valve portion slidably disposed on the valve guide rod, and a linkage assembly three for driving the valve portion to rise and fall. The linkage assembly three includes a rotatably disposed crank arm, which is configured to rotate under the thrust of the vacuum contactor trolley to drive the valve portion to open.

[0015] Furthermore, the valve interlocking mechanism also includes a self-locking component, which includes a locking plate and a locking shaft disposed on the crank arm. The locking plate is configured to be deflected by a spring force and engage with the locking shaft in the reset state after the vacuum contactor trolley has been removed, thereby restricting the rotation of the crank arm.

[0016] Furthermore, the contactor cabinet also includes a front middle door, on which a locking assembly is provided. The locking assembly includes a lock box, a gear transmission structure, and two sets of connecting plates that slide relative to each other driven by the gear transmission structure. The ends of the connecting plates are configured to be inserted into the sockets on the outer shell to lock the front middle door.

[0017] The technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects: The switchgear interlocking mechanism and the grounding switch interlocking mechanism of this invention abandon the traditional interlocking methods that rely on cam friction transmission, spring reset and passive blocking of blocks in the existing technology. Instead, it adopts a bevel gear rigid reversing mechanism with a triangular linkage plate as a unified transmission hub. The rotational power of the grounding switch operating shaft is forcibly diverted by the triangular linkage plate, and the front and rear door locks are actively pushed / pulled through the linkage mechanism. This design not only completely eliminates the safety hazard of false locking of cabinet doors due to spring fatigue failure, but also ensures that the actions of the front and rear lower doors are mechanically absolutely synchronized. It effectively solves the problem of inconsistent interlocking sequence of the front and rear doors. Only after the grounding switch is fully closed and grounded will the front and rear doors unlock simultaneously, fundamentally eliminating the safety blind spot of personnel accidentally entering the live compartment from behind the cabinet.

[0018] This invention utilizes a clever linkage design between the operating hole shield and the locking rod to create a safety logic of immediate locking upon operation. When the operator moves the shield to prepare to operate the grounding switch, the protrusion will inevitably drive the locking rod to move, forming a rigid physical block in the movement path of the vacuum contactor trolley. This design, without adding electrical interlocking, uses a purely mechanical structure to enforce the operating sequence, eliminating the risk of accidental operation such as closing the circuit breaker with the grounding switch on or accidentally pushing the trolley while it is in a grounded state.

[0019] This invention achieves the positioning of the handcart's main shaft nut through the cooperation of the concave frame assembly and the interlocking plate. Combined with the blocking effect of the locking rod, a double locking system is formed, effectively limiting the accidental movement of the handcart in the test / working position. Furthermore, by using a linkage mechanism to drive the fan-shaped operation indicator and the grounding switch operation shaft synchronously, the current "on" or "off" status of the grounding switch can be clearly and intuitively displayed through the observation window. This purely mechanical, hard-connection indication does not rely on a secondary power supply, avoiding misjudgments caused by signal transmission errors, and further ensuring the accuracy of judgment and operational safety for maintenance personnel. Attached Figure Description

[0020] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0021] In the attached diagram: Figure 1 This is an overall schematic diagram of the switch room interlocking mechanism and the grounding switch interlocking mechanism in this application; Figure 2 for Figure 1 A partial structural diagram; Figure 3 for Figure 2 A partial structural diagram; Figure 4 for Figure 3 Enlarged view of point A; Figure 5 for Figure 3 A partial structural diagram of the first interlocking mechanism; Figure 6 for Figure 3 Schematic diagram of the third interlocking mechanism; Figure 7 for Figure 3 A partial structural diagram; Figure 8 for Figure 7 Enlarged view of point B; Figure 9 for Figure 7 A partial structural diagram; Figure 10 for Figure 3 Schematic diagram of the second locking component; Figure 11 for Figure 9 Schematic diagram of the central valve interlocking mechanism; Figure 12 for Figure 11 The left view; Figure 13 for Figure 9 A partial structural diagram; Figure label: 1. Contactor cabinet; 11. Housing; 12. Lifting plate; 13. Instrument door; 14. Front middle door; 142. Operating hole two; 143. Lever; 144. Slide rail; 15. Pull-out partition; 151. Locking hole; 152. Opening slot; 154. Waist slot one; 155. Lever; 156. Operating hole one; 157. Cover plate; 158. Bracket; 16. Front lower door; 17. Front middle partition one; 171. Support frame; 172. Groove; 18. Rear lower door; 2. First interlocking mechanism; 2 1. Grounding knife operating shaft; 22. Mounting bracket; 24. Bevel gear one; 25. Linkage shaft; 26. Bevel gear two; 27. Side plate; 28. Linkage plate one; 29. ​​Protruding shaft; 210. Connecting rod one; 211. Connecting rod two; 212. Connecting piece; 213. Support plate; 214. Mounting piece; 215. Movable shaft; 216. Connecting block; 217. Connecting rod three; 218. Operation indicator; 219. Central shaft; 220. Support plate; 221. Embedded shaft; 222. Support frame; 223. Vertical 3. Straight plate; 4. Second interlocking mechanism; 5. Guide bracket; 6. Blocking end; 7. Bent plate; 8. Slot; 9. Third interlocking mechanism; 10. Locking rod; 11. Anti-locking plate; 12. Shaft; 13. Link five; 14. Bracket plate one; 15. Link six; 16. Right angle piece; 17. Link seven; 18. Waist groove two; 19. Bracket one; 10. Locking component one; 11. Lock box; 12. Connecting plate; 13. Key; 14. Connecting shaft; 15. Locking component two; 16. Guide seat; 17. 2. Locking rod; 63. Pivot seat; 64. Concave frame; 65. Rotating shaft; 66. Elastic retaining ring; 67. Spring piece; 68. Interlocking plate two; 7. Valve interlocking mechanism; 71. Right angle frame; 72. Valve guide rod; 74. Valve part; 75. Fixed bracket; 77. Cover plate; 78. Connecting rod eight; 710. Crank arm; 711. Bushing; 713. Limiting shaft; 714. Locking shaft; 715. Shaft; 716. Spring three; 717. Interlocking plate; 718. Side plate; 723. Block. Detailed Implementation

[0022] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0023] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] This embodiment applies to a vacuum contactor trolley in the prior art. Besides conventional components such as a frame, contacts, fuses, secondary plugs, and various status indicators, the key feature of this trolley is its trolley-in / out operating hole, valve operating plate, and main shaft nut located at the front of the chassis, all designed to cooperate with this invention. The operating hole, in conjunction with a handle, allows the trolley to move between the test and working positions. During movement, the valve operating plate triggers the valve interlocking mechanism 7 of this invention. The main shaft nut is configured to cooperate with the locking component 6 of this invention when the trolley is in the test position, thereby achieving positioning and locking of the trolley.

[0025] Reference Figures 1-3 As shown, the switch room interlocking mechanism and grounding knife interlocking mechanism provided in this embodiment of the invention include a contactor cabinet 1. The contactor cabinet 1 has a shell 11, and the shell 11 contains a contactor chamber. The front end of the contactor cabinet 1 is provided with an instrument door 13, a front middle door 14, a pull-out partition 15, and a front lower door 16 in sequence from top to bottom. At the same time, a rear lower door 18 is provided on the side of the contactor cabinet 1 opposite to the front lower door 16. The instrument door 13 can be used to install instruments for easy observation of the operating parameters of the contactor cabinet 1. The front middle door 14 and the front lower door 16 facilitate the inspection and maintenance of components in different areas inside. Meanwhile, the lifting plate 12 fixed on the top surface of the shell 11 facilitates the lifting operation of the contactor cabinet 1 during transportation and installation.

[0026] like Figures 2-5 and Figure 13 As shown, a through-hole 156 is provided on the pull-out partition 15, which provides an operating channel for the grounding switch operating handle. At the same time, a locking hole 151 is fixed on the pull-out partition 15 and directly above the operating hole 156. The locking hole 151 is used to guide the operation of the grounding switch operating handle. A first interlocking mechanism 2 is provided inside the housing 11. The first interlocking mechanism 2 is used to realize the interlocking control of the grounding switch and ensure operational safety.

[0027] The first interlocking mechanism 2 includes a drive unit disposed inside the housing 11. The drive unit includes a mounting bracket 22 fixed to the inner wall of the housing 11. Two sets of support plates 213 are fixed to the sides of the pull-out partition 15 near both ends. A bracket 158 ​​is fixed to the side of one set of support plates 213. The bracket 158 ​​has a mounting panel. A gap is left between the mounting panel and the pull-out partition 15. A grounding switch operating shaft 21 is movably disposed between the mounting bracket 22 and the mounting panel. The two ends of the grounding switch operating shaft 21 are respectively connected to the mounting bracket 22 and the bracket 158 ​​by bearings. A through operating hole 156 is opened on the pull-out partition 15. The operating hole 156 is coaxial with the grounding switch operating shaft 21 to allow the external grounding switch operating handle to pass through and to be inserted into one end of the grounding switch operating shaft 21. A gap is left between the operating hole 156 and one end of the grounding switch operating shaft 21. A mating hole adapted to the insertion of the grounding switch operating handle is opened at one end of the grounding switch operating shaft 21. The mating hole is preferably hexagonal.

[0028] The other end of the ground knife operating shaft 21 extends into the mounting bracket 22 and is fixed with a bevel gear 24. A linkage mechanism is also provided on the mounting bracket 22 to convert the rotation of the ground knife operating shaft 21 into a linkage action of other components. This linkage mechanism includes a side plate 27 fixed to the inner wall of the housing 11. A linkage shaft 25 is connected between the mounting bracket 22 and the side plate 27 via a bearing. The linkage shaft 25 is perpendicular to the ground knife operating shaft 21. One end of the linkage shaft 25 extending into the mounting bracket 22 is fixed with a bevel gear 26 that meshes with the bevel gear 24. Through the meshing transmission of the bevel gears, the rotational motion of the ground knife operating shaft 21 is transmitted to the linkage shaft 25.

[0029] A linkage plate 28 is fixedly sleeved on the linkage shaft 25. The linkage plate 28 has a triangular structure design, which facilitates linkage in different directions through rotation. A protruding shaft 29 extends outward from one corner (i.e., the eccentric position) on the side of the linkage plate 28. A connecting rod 210 is movably sleeved on the protruding shaft 29. The connecting rod 210 can rotate on the protruding shaft 29. A connecting rod 211 is movably connected to the other end of the connecting rod 210. The rotation of the connecting rod 210 can drive the connecting rod 211 to move synchronously.

[0030] like Figures 3-5 As shown, a rotating part is movably connected to one end of the second connecting rod 211. The rotating part includes a connecting member 212 movably connected to the second connecting rod 211 at a position away from the first connecting rod 210. A mounting member 214 is provided on the bottom surface of a set of support plates 213, and a movable shaft 215 is connected to the side bearing of the mounting member 214. The connecting member 212 provides a transition for the connection between the second connecting rod 211 and the movable shaft 215, and the movable shaft 215 can rotate on the mounting member 214. One end of the connecting member 212 is movably sleeved on the movable shaft 215, and the movement of the second connecting rod 211 can drive the movable shaft 215 to rotate through the connecting member 212.

[0031] Meanwhile, a connecting block 216 is fixedly sleeved on one side of the connecting piece 212 on the movable shaft 215. One end of the connecting block 216 is movably connected to the connecting rod 217 via a sliding shaft. The rotation of the movable shaft 215 can drive the connecting rod 217 to move through the connecting block 216. A support frame 222 is fixed on the bottom surface of the support plate 213. The support frame 222 has a concave structure. A support plate 220 is fixed on the inner side of the support frame 222. A central shaft 219 is provided between the top of the inner wall of the support frame 222 and the support plate 220. The central shaft 219 can rotate on the support frame 222.

[0032] An operation indicator 218 is fixedly sleeved on the central shaft 219. The operation indicator 218 has a fan-shaped structure and the words "open" and "closed" are displayed on its surface to intuitively show the operation status of the grounding switch. One end of the connecting rod 217 is movably connected to the operation indicator 218. The movement of the connecting rod 217 can drive the operation indicator 218 to rotate around the central shaft 219, thereby switching the "open" and "closed" display status.

[0033] When operating the grounding switch using the operating handle, the handle is inserted into the hexagonal mating hole at one end of the grounding switch operating shaft 21 through the operating hole 156 on the pull-out partition 15. Rotating the handle counterclockwise causes the grounding switch operating shaft 21 to rotate. The bevel gear 24 at one end drives the meshing bevel gear 26 to rotate, which in turn causes the linkage shaft 25 to rotate. The triangular linkage plate 28 on the linkage shaft 25 rotates, and the protruding shaft 29 at its corner drives the connecting rod 210 to move. The connecting rod 210 then drives the connecting rod 211 to move synchronously. The connecting rod 211 causes the movable shaft 215 to rotate through the connector 212. The connecting block 216 on the movable shaft 215 drives the connecting rod 217 to move. The connecting rod 217 pushes the fan-shaped operating indicator 218 to rotate around the central axis 219, switching the "open" and "closed" display states. This visually presents the grounding switch's state switching from closed to open, ensuring safe and accurate operation.

[0034] like Figure 1 and Figures 4-5 As shown, a second interlocking mechanism 3 is provided on the side of the support frame 222. This second interlocking mechanism 3 is used to realize the interlocking control between the grounding switch and the front lower door 16 to ensure operational safety. The second interlocking mechanism 3 mainly includes a linkage assembly 1 and a guide bracket 32, a bent plate 34, a vertical plate 223, and an embedded shaft 221 used in conjunction with it. Among them, the linkage assembly 1 includes a first linkage 210, a second linkage 211, a connecting piece 212, and a movable shaft 215. One end of the first linkage 210 is connected to the linkage plate 28. Through the transmission of the second linkage 211 and the connecting piece 212, the movable shaft 215 is driven to rotate, thereby transmitting the power of the grounding switch operating shaft to the locking end.

[0035] At the locking end, the guide bracket 32 ​​is fixed to the side of the support frame 222. The guide bracket 32 ​​has a concave structure. A bent plate 34 is horizontally movably inserted through the two vertical ends of the guide bracket 32. The bent plate 34 can move horizontally on the guide bracket 32. One end of the bent plate 34 has a blocking end 33, and the other end has a vertical end with a slot 35. At the same time, a vertical plate 223 is fixed on the movable shaft 215. The vertical plate 223 moves with the rotation of the movable shaft 215. An embedded shaft 221 adapted to the slot 35 is fixed on the vertical plate 223. When the embedded shaft 221 is embedded in the slot 35, the movement of the bent plate 34 can be restricted. At the same time, a bracket body (not shown in the figure) suitable for contacting the lower surface of the blocking end 33 is provided on the inner side of the front lower door 16 to restrict the front lower door 16 from sliding upward to open.

[0036] When the grounding switch is in the open state, under the action of the second interlocking mechanism 3, the movable shaft 215 rotates, driving the vertical plate 223 to move, causing the embedded shaft 221 to engage with the slot 35 of the bent plate 34, restricting the movement of the bent plate 34. At the same time, the bracket body inside the lower front door 16 is blocked by the blocking end 33, preventing the lower front door 16 from moving upward and thus preventing it from opening, ensuring operational safety. When the grounding switch is closed, the movable shaft 215 rotates, causing the vertical plate 223 to drive the embedded shaft 221 to disengage from the lowest end of the slot 35, releasing the restriction on the bent plate 34, and allowing the bent plate 34 to move (e.g., Figure 4 When the bracket body and the bending plate 34 are unlocked, the lower front door 16 can move upward and open, thus realizing the interlocking control between the grounding switch and the lower front door 16, ensuring a safe and orderly operation.

[0037] like Figures 2-3 and Figure 6 As shown, a third interlocking mechanism 4 is connected between the linkage plate 28 and the rear lower door 18. This third interlocking mechanism 4 is used to realize the interlocking control between the grounding switch and the rear lower door 18 to ensure operational safety. The third interlocking mechanism 4 mainly includes a linkage assembly 2 and a locking rod 41 and a reverse locking plate 42 that cooperate with it. Among them, the linkage assembly 2 is used to transmit mechanical transmission, and it specifically includes a right-angle piece 47, a connecting rod 6 46, a connecting rod 7 48, a bracket 1 49, and a connecting rod 5 44.

[0038] Specifically, a locking rod 41 is located on the inner side of the lower rear door 18. The locking rod 41 has a hook portion 1, which is part of the linkage assembly 2. A right-angle piece 47 is fixed to the inner wall side of the outer casing 11. A horizontally arranged connecting rod 6 46 is movably inserted through the vertical end of the right-angle piece 47. The connecting rod 6 46 can move horizontally on the right-angle piece 47. A connecting rod 7 48 is movably connected to one end of the connecting rod 6 46. A waist groove 2 481 is opened near one end of the connecting rod 7 48. The waist groove 2 481 is movably sleeved on the protruding shaft 29 of the linkage plate 1 28. The movement of the connecting rod 6 46 can drive the movement of the connecting rod 7 48.

[0039] Furthermore, a bracket 49 is fixed to the inner wall side of the outer casing 11, and the connecting rod 48 is movably mounted on the bracket 49 at the central position, with the bracket 49 providing a fulcrum for the rotation of the connecting rod 48. In the end transmission path of the connecting rod assembly 2, a connecting rod 44 is movably connected to the other end of the connecting rod 46, and the movement of the connecting rod 46 can be transmitted through the connecting rod 44. A bracket plate 45 is fixed to one end of the connecting rod 44, providing a mounting base for the connecting rod 44. At the same time, a reverse locking plate 42, which is locked to the locking rod 41, is movably mounted on one end of the connecting rod 44 via a shaft 43. The reverse locking plate 42 is adapted to be locked to the locking rod 41.

[0040] When the anti-lock plate 42 engages with the hook portion of the locking rod 41, it can restrict the opening of the rear lower door 18. At the same time, a second spring (not shown in the figure) is connected to the bottom end of the anti-lock plate 42. The second spring is connected to the inner wall of the outer casing 11 and provides the anti-lock plate 42 with a restoring force.

[0041] When the grounding switch is in the open state, the grounding knife operating shaft 21 rotates, driving the linkage 48 to move. Since the linkage 48 uses the bracket 49 as the fulcrum and its groove 481 is movably connected to the protruding shaft 29, the movement of one end of the linkage 48 causes the linkage 46 to slide horizontally to the left on the right-angle piece 47, thereby pushing the linkage 44 to move in tandem. At this time, the linkage 44 drives the anti-locking plate 42 to move downward against the elastic force of the spring, so that the anti-locking plate 42 engages and locks with the hook part 1 on the locking rod 41, thereby restricting the opening action of the rear lower door 18 and ensuring that the rear lower door 18 cannot be opened when the grounding switch is open, thus forming a reliable safety protection and effectively avoiding the safety risks caused by accidentally opening the rear lower door 18.

[0042] When the grounding switch is in the closed state, the rotation of the grounding knife operating shaft 21 drives the linkage 48 to move in the opposite direction through a linkage action. The linkage 48 uses the bracket 49 as the fulcrum and the cooperation between the waist groove 481 and the protruding shaft 29 to drive the linkage 46 to slide horizontally to the right on the right-angle piece 47. The linkage 46 then pulls the linkage 44 to reset. At this time, the anti-locking plate 42 resets upward under the elastic force of the spring 2 and disengages from the hook part 1 of the locking rod 41. As the anti-locking plate 42 separates from the locking rod 41, the opening restriction of the rear lower door 18 is released, and the operator can open the rear lower door 18 normally to perform related operations.

[0043] like Figures 7-10 As shown, front partition plates 17 are provided at both ends of the inner wall of the outer casing 11. The two sets of support plates 213 are fixed to the bottom surface of the front partition plates 17, and the front partition plates 17 are used to place the vacuum contactor trolley. The front partition plates 17 are used to divide the internal space of the contactor cabinet 1. Support brackets 171 extend upward from both ends of the front partition plates 17, and a locking assembly 5 is provided on the front door 14. The locking assembly 5 is used to lock the front door 14 to ensure that the front door 14 will not be accidentally opened when the contactor cabinet 1 is in operation, thereby improving safety. The locking assembly 5 includes a lock box 51 fixed to the inner side of the front door 14, and connecting plates 52 are movably connected through both sides of the lock box 51. The connecting plates 52 can slide horizontally on the lock box 51, and the two sets of connecting plates 52 are movably connected to the two ends of the two sets of connecting plates 52. The connecting shafts 54 cooperate with the connecting plates 52.

[0044] Meanwhile, the support frame 171 has an insertion hole (not shown in the figure) that matches the diameter of the connecting shaft 54. When the connecting shaft 54 ​​is inserted into the insertion hole, the front middle door 14 can be locked. Inside the lock box 51, there is a transmission structure that matches the key 53. In this embodiment, the transmission structure is preferably a gear and rack transmission mechanism. Specifically, the end of the lock cylinder is connected to a transmission gear (not shown in the figure), and the inner sides of the two sets of oppositely arranged connecting plates 52 are provided with rack structures that mesh with the transmission gear, and the key 53 is suitable for insertion into the lock box 51.

[0045] When key 53 is inserted into lock box 51 and rotated, key 53 drives transmission gear to rotate. When key 53 rotates in the locking direction, through the meshing transmission of gear and rack, it drives two sets of connecting plates 52 to move in opposite directions (away from each other) along the guide structure on both sides of lock box 51. The connecting plates 52 drive the connecting shafts 54 at both ends to extend outward synchronously until they are inserted into the insertion hole of support frame 171, thus achieving rigid locking.

[0046] When the key 53 rotates in the opposite direction of unlocking, the transmission gear drives the two sets of connecting plates 52 to move towards each other (closer to each other). The connecting shaft 54 ​​retracts inward with the connecting plates 52 and exits from the insertion hole of the support frame 171. Through the mechanical linkage of the internal transmission structure of the lock box 51 driven by the rotation of the key 53, the relative sliding of the two sets of connecting plates 52 is realized, thereby completing the locking and unlocking action of the front middle door 14. In this way, the locking and unlocking of the front middle door 14 is realized by operating the linkage of the connecting plates 52 and the connecting shaft 54 ​​through the key 53, ensuring the safety and convenience of operation.

[0047] like Figures 9-10 As shown, an operation hole 142 for the vacuum contactor operating handle is provided on the front middle door 14. A shielding part is provided on the front middle door 14 to shield the operation hole 142, preventing accidental operation or foreign object entry and ensuring operational safety. The shielding part includes a lever 143 slidably mounted on the front middle door 14. One end of the lever 143 is connected to an operation hole baffle (not shown in the figure), which is used to shield the operation hole 142. The lever 143 passes through the front middle door 14, and a groove 144 is provided on the front middle door 14 for the lever 143 to slide. The groove 144 provides guidance for the sliding of the lever 143. When it is necessary to operate the vacuum contactor, the lever 143 can be slid to the left so that the operation hole baffle moves away from the operation hole 2 142, making it easy for the operation handle to pass through. When it is not necessary to operate, the lever 143 slides to the right in the groove 144, and the operation hole baffle blocks the operation hole 2 142 to avoid accidental operation.

[0048] Meanwhile, a second shielding part is provided on the pull-out partition 15 to block the first operating hole 156. This second shielding part is used to prevent the first operating hole 156 from being accidentally touched or foreign objects from entering when it is not in operation. The second shielding part includes a shielding plate 157 that is slidably disposed on the inner side of the pull-out partition 15. The shielding plate 157 is used to block the first operating hole 156. The surface of the shielding plate 157 has a toggle rod 155, which facilitates the operation of the shielding plate 157 by the operator. The toggle rod 155 is disposed through the pull-out partition 15 and has a toggle opening on the pull-out partition 15. The lever 155 provides a sliding space through a groove 154, which provides space and guidance for the sliding of the lever 155. At the same time, an opening groove 152 is provided on the pull-out partition 15, which allows the staff to easily see the "separate" and "close" markings on the operation indicator 218 and understand the equipment's operating status in a timely manner. In actual operation scenarios, by moving the lever 143 and the lever 155, the second operation hole 142 and the first operation hole 156 can be blocked or opened respectively, which not only ensures the convenience of operation but also improves the safety of equipment operation.

[0049] Continue to refer to Figures 9-10As shown, a locking component 2 6 is provided on the front middle partition 17. This locking component 2 6 is used to lock the vacuum contactor trolley to ensure that the vacuum contactor trolley is in a suitable state, thus ensuring the safe operation of the contactor cabinet 1. The locking component 2 6 includes a locking part 1 provided on the front middle partition 17, which is used to achieve initial locking linkage. The locking part includes a concave frame 64 disposed on the front middle partition 17. A second interlocking plate 68 is movably connected to the concave frame 64 via a rotating shaft 65. An elastic retaining ring 66 is sleeved on the rotating shaft 65 to limit the axial movement of the rotating shaft 65 and prevent it from falling off during movement. The second interlocking plate 68 can rotate around the rotating shaft 65. The second interlocking plate 68 is nested on the concave frame 64, and a spring piece 67 is disposed between one end of the second interlocking plate 68 and the front middle partition 17. The spring piece 67 provides elastic support for the second interlocking plate 68, keeping the second interlocking plate 68 in its initial position for easy subsequent linkage operation.

[0050] Furthermore, a second locking part is provided on the front middle partition 17, located on one side of the first locking part. The second locking part cooperates with the first locking part to lock the vacuum contactor trolley. The second locking part includes a guide seat 61 fixed on the front middle partition 17 and located on one side of the locking part. The guide seat 61 is concave and has a U-shaped groove. A fulcrum seat 63 is fixed on the front middle partition 17. The fulcrum seat 63 provides support for one end of the locking rod 62. The locking rod 62 is movably arranged between the guide seat 61 and the fulcrum seat 63. The locking rod 62 can move between the guide seat 61 and the fulcrum seat 63. Both ends of the locking rod 62 have bent ends. One bent end is limited by the vertical section of the fulcrum seat 63, and the other bent end is placed in the U-shaped groove.

[0051] Meanwhile, the baffle plate 157 extends upward with a protrusion (not shown in the figure), which passes through the front middle partition 17. At the same time, a slot 172 is provided on the front middle partition 17 for the protrusion to pass through. The protrusion makes support contact with one bent end of the locking rod 62.

[0052] When the vacuum contactor trolley is in a locked state, such as the test position, and the grounding switch is closed, the baffle plate 157 is in a specific position. The protrusion on the baffle plate 157 passes through the slot 172 on the front middle partition 17, abutting against and lifting one bent end of the locking rod 62. At this time, the locking rod 62 is guided by the guide seat 61 and the fulcrum seat 63, and the entire rod is displaced. The bent end at its front end is raised accordingly, forming a rigid block with the front end of the bottom of the vacuum contactor trolley. At this time, even if the operator turns the handle of the trolley rocking mechanism to try to push the trolley from the test position to the working position, the action cannot be completed due to the physical blockage of the locking rod 62. The movement of the vacuum contactor trolley on the track is completely restricted, and it cannot be connected to the main circuit in the cabinet, thus avoiding the risk of short circuit that may be caused by the trolley accidentally entering the working position when the grounding switch is closed.

[0053] When the vacuum contactor trolley is pushed from the transfer vehicle into the contactor cabinet 1 and reaches the test position, the main shaft nut on the vacuum contactor trolley slides into the U-shaped groove of the concave frame 64 on the front middle partition 17. At this time, the interlocking plate 68 set on the concave frame 64 deflects downward and abuts against the surface of the main shaft nut under the reset force of the spring plate 67, thus forming a double locking mechanism with the concave frame 64.

[0054] By utilizing the U-shaped structure of the concave frame 64 to restrict the lateral displacement of the main shaft nut, and cooperating with the elastic clamping action of the interlocking plate 68, positioning is achieved, stabilizing the posture of the vacuum contactor trolley in the test position, and preventing it from lateral movement or accidental slippage due to vibration or accidental contact. On the other hand, this positioning action complements the blocking action of the locking rod 62. The main shaft nut and the concave frame 64 assembly lock the positional stability of the trolley, while the locking rod 62 rigidly blocks the movement path of the trolley to the working position in front. Together, they form a reliable mechanical interlocking system, making it impossible for the trolley to retreat or move forward at this time, ensuring the stability and safety of the trolley during transportation and testing.

[0055] like Figures 11-12 As shown, a valve interlocking mechanism 7 is provided on the front middle partition 17. The valve interlocking mechanism 7 includes two sets of right-angle brackets 71 fixed to the inner wall of the outer shell 11 and near both ends of the front middle partition 17. A valve guide rod 72 is fixed between the two sets of vertically arranged right-angle brackets 71. A valve part 74 is connected to the two sets of valve guide rods 72. The valve guide rod 72 provides guidance for the movement of the valve part 74. The valve part 74 can move along the valve guide rod 72. A fixed bracket 75 is sleeved on the two sets of valve guide rods 72 respectively.

[0056] Meanwhile, a cover plate 77 is connected between the two sets of fixed brackets 75, which serves a protective function. In order to drive the valve part 74 to lift and open, this embodiment is provided with a linkage assembly three, which specifically includes a linkage eight 78 and a crank arm 710. The linkage eight 78 is used to transmit motion. One end of the linkage eight 78 is movably connected to the crank arm 710, and the other end of the linkage eight 78 is movably connected to the fixed bracket 75. Side plates 718 are provided on both sides of the inner wall of the outer shell 11. One end of the crank arm 710 is movably disposed through the side plate 718, and the crank arm 710 is movably connected to the side plate 718 through a shaft 715. The shaft 715 provides a fulcrum for the rotation of the crank arm 710.

[0057] Furthermore, to prevent the valve from malfunctioning, the valve interlocking mechanism 7 is also equipped with a self-locking component, which specifically includes a locking plate 717 and a locking shaft 714. The locking plate 717 is movably connected to the side of the side plate 718. The locking plate 717 is used to cooperate with the crank arm 710 to achieve locking. The position of the locking plate 717 near one end is connected to the crank arm 710 near one end through a spring 716. The spring 716 provides the locking plate 717 with a reset force. At the same time, a limiting shaft 713 passes through the crank arm 710. The limiting shaft 713 is movably connected to the inner wall side of the side plate 718. The limiting shaft 713 is used to limit the range of motion of the crank arm 710.

[0058] One end of the limiting shaft 713 has a bushing 711, which serves as a protective element. Meanwhile, the side of the crank arm 710 has a locking shaft 714 belonging to the aforementioned self-locking assembly. One end of the interlocking plate 717 has a notch for engaging with the locking shaft 714. Additionally, blocks 723 are fixed to the sides of the two sets of side plates 718 that are close to each other, and these blocks 723 serve as limiting elements.

[0059] When the vacuum contactor trolley is moved from the test position to the working position, the valve operating plate of the vacuum contactor trolley first contacts and presses the interlocking plate 717 in the self-locking assembly. Under the pressure, the interlocking plate 717 moves upward, thereby unlocking the lock between it and the locking shaft 714. Subsequently, the trolley continues to push, driving the crank arm 710 to rotate around the shaft 715. The rotation of the crank arm 710 is transmitted through the connecting rod 78. The connecting rod 78 pulls the fixed bracket 75, causing the valve part 74 to slide upward along the valve guide rod 72 to open the valve part 74 and provide a channel for the vacuum contactor trolley to enter the working position.

[0060] As the vacuum contactor trolley retracts from the working position to the test position, the pressure exerted by the valve operating plate on the interlocking plate 717 gradually disappears. At this point, the valve section 74 loses its upward pull and automatically resets downwards along the valve guide rod 72 under its own weight, thus closing the valve section 74. Simultaneously, the interlocking plate 717 resets downwards under the elastic force of the spring 716, re-engaging with the locking shaft 714 on the crank arm 710 and re-entering the self-locking state. This ensures that the valve section 74 remains closed when not in operation, preventing foreign objects from entering or causing safety accidents due to misoperation. This achieves interlocking control between the valve section 74 and the operation of the vacuum contactor trolley.

[0061] Working principle: In use, the grounding switch operating handle is inserted into the operating hole 156 on the pull-out partition 15, and guided by the locking hole 151 into the docking hole of the grounding switch operating shaft 21. Turning the handle drives the grounding switch operating shaft 21 to rotate. The grounding switch operating shaft 21 drives the bevel gear 24 and bevel gear 26 to mesh and transmit power, causing the linkage shaft 25 to rotate. The linkage plate 28 on the linkage shaft 25 drives the connecting rod 210 and the connecting rod 211 to move in sequence through the protruding shaft 29. The connecting rod 211 drives the movable shaft 215 to rotate through the connecting piece 212. The movable shaft 215 further pushes the fan-shaped operation indicator 218 to rotate around the central axis 219 through the connecting block 216 and the connecting rod 217, thereby switching the "open" and "closed" display. This process realizes the switching and synchronous intuitive feedback of the grounding switch's open and closed status, ensuring the accuracy of the operation status confirmation.

[0062] During the above process, the second interlocking mechanism 3 and the third interlocking mechanism 4 operate synchronously to achieve interlocking between the grounding switch and the front lower door 16 and the rear lower door 18. When the grounding switch is in the open state, the cabinet should be energized and the cabinet door needs to be locked. In the second interlocking mechanism 3, the movable shaft 215 drives the vertical plate 223 to rotate, so that the embedded shaft 221 is engaged in the slot 35 of the bent plate 34, locking the position of the bent plate 34, so that its blocking end 33 keeps blocking the inner support body of the front lower door 16, preventing the front lower door 16 from opening. At the same time, in the third interlocking mechanism 4, the linkage plate 1 28 drives the linkage rod 7 48, linkage rod 6 46 and linkage rod 5 44 through the protruding shaft 29, driving the anti-locking plate 42 to overcome the spring force and hook and lock with the locking rod 41 on the rear lower door 18, preventing the rear lower door 18 from opening. It is worth mentioning that in this solution, the locking of the rear lower door 18 is achieved by the rigid drive of the linkage, while the unlocking relies on the spring force to reset. This design conforms to the "fail-safe" principle. Even if the reset spring breaks or other extreme failures occur, the anti-lock plate 42 will not automatically fall off and unlock, ensuring that the cabinet door remains locked and safe even in the event of an unknown failure.

[0063] This solution, through the second interlocking mechanism 3 and the third interlocking mechanism 4, mandates that the door is physically locked as long as the grounding switch is not closed. Only when the operator completes the action of closing the grounding switch, i.e., the grounding knife operating shaft 21 is rotated to the correct position, will the interlocking mechanism release the door lock. This requires the operator to first perform the safety action of closing the grounding switch in order to obtain the right to open the door, thus avoiding the possibility of misoperation from the process perspective.

[0064] When the grounding switch is in the closed state, the mechanisms are linked in reverse. The embedded shaft 221 disengages from the lowest end of the slot 35, the bent plate 34 is unlocked and displaced, the opening restriction of the front lower door 16 is released, and at the same time, the anti-locking plate 42 is reset and unlocked under the action of the second spring, and the rear lower door 18 can also be opened. This double mechanical interlock effectively avoids the risk of accidentally entering the energized compartment. This scheme uses the bevel gear reversing structure realized by the cooperation of bevel gear 1 24 and bevel gear 2 26, and the linkage plate 1 28 with a triangular structure to transmit power to the interlocking structure of the front lower door 16 and the interlocking structure of the rear lower door 18 at the same time, so that no matter whether the personnel try to enter from the front lower door 16 or the rear lower door 18, as long as it is not grounded, it cannot be opened, eliminating the safety blind spot. The locking of the front lower door 16 and the rear lower door 18 is released only when the grounding switch is fully closed. Conversely, when the grounding switch is open, both the front lower door 16 and the rear lower door 18 are forcibly locked. This design ensures that operators can only open the cabinet doors after confirming that the grounding is safe, eliminating the risk of accidentally entering a live compartment. Furthermore, a set of drive mechanisms simultaneously achieves bidirectional protection for the front and rear doors, resulting in a compact structure and high safety and reliability.

[0065] In addition, the locking component 5 drives the gear transmission structure inside the lock box 51 through the key 53, which drives the connecting plate 52 to drive the connecting shaft 54 ​​to insert into the support frame 171 socket on the outer shell 11, thereby achieving rigid locking and unlocking of the front middle door 14. The sliding of the operating hole baffle and the blocking plate 157 are controlled by the lever 143 and the lever 155 respectively, which physically block the operating hole 142 and the operating hole 156 to prevent foreign objects from entering and accidental contact.

[0066] When the grounding switch needs to be operated, the shield 157 is slid upward to expose the operating hole 156. The protrusion on the shield 157 passes through the slot 172 and pushes against the locking rod 62, causing the locking rod 62 to tilt upward with the fulcrum 63 as the fulcrum. At this time, the locking rod 62 forms a rigid block on the movement path of the vacuum contactor trolley, preventing it from accidentally entering the working position. At the same time, when the trolley stops at the test position, its own main shaft nut slides into the concave frame 64 on the front middle partition 17 and is elastically pressed and positioned by the interlocking plate 68. This design forms a double locking mechanism. The concave frame 64 and the interlocking plate 68 cooperate to restrict the lateral movement and accidental slippage of the trolley, while the locking rod 62 blocks the longitudinal feed of the trolley. The cooperation of the two ensures the high stability and safety of the trolley during transportation and testing.

[0067] When the vacuum contactor trolley is pushed to the working position, the valve operating plate on the trolley presses the interlock plate 717, releasing it from locking the crank arm 710. Then the crank arm 710 rotates and drives the valve part 74 to slide upward along the valve guide rod 72 through the connecting rod 78 to open. When the trolley is retracted, the valve part 74 closes automatically by gravity, and the interlock plate 717 resets under the action of the spring 716 and relocks the crank arm 710, realizing the forced locking and reset function of the valve.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A switch room interlock mechanism and a ground rod interlock mechanism, characterized by comprising: The contactor cabinet (1) has a shell (11), a front middle partition plate (17) is arranged at both ends of the inner wall of the shell (11), and a pull-out partition plate (15) is arranged below the front middle partition plate (17); A first interlocking mechanism (2) is arranged in the shell (11), the first interlocking mechanism (2) comprises a driving part and a linkage part in transmission connection with the driving part, the driving part comprises a ground knife operation shaft (21) for driving the grounding switch to open and close, and a bevel gear (24) fixed to the end of the ground knife operation shaft (21); The linkage part comprises a linkage shaft (25) arranged vertically to the ground knife operation shaft (21), the linkage shaft (25) is provided with a bevel gear (26) in meshing transmission with the bevel gear (24), and the linkage shaft (25) is fixedly sleeved with a linkage plate (28); A second interlocking mechanism (3) is mechanically connected with the linkage plate (28) through a connecting rod assembly (1), and is configured to convert the opening and closing state of the grounding switch into mechanical locking of the front lower door (16) by rotating the linkage plate (28); A third interlocking mechanism (4) is mechanically connected with the linkage plate (28) through a connecting rod assembly (2), and is configured to convert the opening and closing state of the grounding switch into mechanical locking of the rear lower door (18) by rotating the linkage plate (28); The linkage plate (28) is designed in a triangular structure, which serves as a unified transmission hub to drive the second interlocking mechanism (3) and the third interlocking mechanism (4) to act synchronously; A locking assembly (6) comprises a locking rod (62) movably arranged on the front middle partition plate (17) and a shielding plate (157) slidably arranged on the pull-out partition plate (15), the pull-out partition plate (15) is provided with an operation hole (156), and the shielding plate (157) is configured to drive the locking rod (62) to move to block the movement of the vacuum contactor handcart when the operation hole (156) is exposed.

2. The switch room interlock and ground rod interlock of claim 1, wherein: The linkage plate (28) is provided with a protruding shaft (29) arranged eccentrically, the first interlocking mechanism (2) further comprises a connecting rod (210) and a connecting rod (211), one end of the connecting rod (210) is movably sleeved on the protruding shaft (29), the other end is movably connected with one end of the connecting rod (211), and a rigid transmission chain is formed to transmit the rotary motion of the linkage plate (28) outward.

3. The switch room interlock and ground rod interlock of claim 2, wherein: The rotating part comprises a mounting piece (214), a movable shaft (215), a connecting block (216), a connecting rod three (217), a support frame (222), a central shaft (219) and an operation indicator (218); the mounting piece (214) and the support frame (222) are fixed on the supporting plate (213) arranged on the side of the pull-out partition (15); the movable shaft (215) is rotatably connected to the mounting piece (214) and movably connected to the connecting rod two (211) away from the connecting rod one (210); the connecting block (216) is fixedly arranged on the movable shaft (215); one end of the connecting rod three (217) is movably connected to the connecting block (216), and the other end is movably connected to the operation indicator (218); the operation indicator (218) is rotatably arranged on the central shaft (219) of the support frame (222), so as to switch the display state of the operation indicator (218) through the rotation of the ground cutter operation shaft (21).

4. The switch room interlock and ground rod interlock of claim 3, wherein: The second interlocking mechanism (3) comprises a guide support (32), a bent plate (34), a vertical plate (223), an embedded shaft (221) and the connecting rod assembly one; the connecting rod assembly one comprises a connecting rod one (210), a connecting rod two (211), a connecting piece (212) and a movable shaft (215); one end of the connecting rod one (210) is connected to the linkage plate one (28), and the other end is connected to the connecting rod two (211); the connecting rod two (211) drives the movable shaft (215) to rotate through the connecting piece (212); the guide support (32) is fixed on the side of the support frame (222); the bent plate (34) is slidably arranged on the guide support (32); one end of the bent plate (34) is provided with a blocking end (33) suitable for blocking the opening of the front lower door (16), and the other end is provided with a clamping groove (35); the vertical plate (223) is fixedly arranged on the movable shaft (215); the embedded shaft (221) is fixedly arranged on the vertical plate (223); when the grounding switch is in the open state, the movable shaft (215) drives the vertical plate (223) to rotate, so that the embedded shaft (221) is embedded in the clamping groove (35), the sliding of the bent plate (34) is limited, and the blocking end (33) remains inserted into the opening path of the front lower door (16).

5. The switch room interlock and ground rod interlock of claim 2, wherein: The third interlocking mechanism (4) comprises a lock rod (41), a reverse locking plate (42) and the second linkage assembly; the second linkage assembly comprises a right-angle piece (47), a linkage six (46), a linkage seven (48), a bracket one (49) and a linkage five (44); the lock rod (41) is installed on the inner side of the rear lower door (18), the middle part of the linkage seven (48) is rotatably connected to the bracket one (49) fixed on the shell (11), one end of the linkage seven (48) is provided with a waist groove two (481), the waist groove two (481) is movably sleeved on the protruding shaft (29) of the linkage plate one (28), the linkage six (46) is slidably arranged through the right-angle piece (47) fixed on the shell (11), and the two ends of the linkage six (46) are connected with the linkage seven (48) and the linkage five (44) respectively, the linkage five (44) drives the reverse locking plate (42) to act, so that the reverse locking plate (42) is locked or separated from the lock rod (41).

6. The switch room interlock and ground rod interlock of claim 1, wherein: The second locking assembly (6) further comprises a guide seat (61) and a fulcrum seat (63) fixed on the front middle partition plate one (17), one end of the locking rod (62) is limited by the fulcrum seat (63) to form a rotating fulcrum, and the other end is movably constrained in the guide seat (61), the shielding plate (157) has a protruding part extending upwards, the front middle partition plate one (17) is provided with a slot (172) through which the protruding part passes, and the linkage of the shielding plate (157) and the locking rod (62) is configured such that, when the shielding plate (157) moves, the protruding part pushes one end of the locking rod (62) by passing through the slot (172), so that the locking rod (62) is deflected and tilted with the fulcrum seat (63) as the fulcrum.

7. The switch room interlock and ground rod interlock of claim 6, wherein: The second locking assembly (6) further comprises a locking part one arranged on the front middle partition plate one (17), the locking part one comprises a concave frame (64) fixed on the front middle partition plate one (17) and an interlocking plate two (68) rotatably arranged in the concave frame (64), and the interlocking plate two (68) is configured to be kept in an initial position under the action of elastic force and cooperate with the concave frame (64) to position the main shaft nut of the vacuum contactor trolley, and the physical blocking of the locking rod (62) forms double locking.

8. The switch room interlock and ground rod interlock of claim 1, wherein: The front middle partition plate one (17) is provided with a valve interlocking mechanism (7), the valve interlocking mechanism (7) comprises a valve guide rod (72), a valve part (74) slidably arranged on the valve guide rod (72), and a third linkage assembly for driving the valve part (74) to lift, the third linkage assembly comprises a swing arm (710) rotatably arranged, and the swing arm (710) is configured to rotate under the action of the thrust of the vacuum contactor trolley, so as to drive the valve part (74) to open.

9. The switch room interlock and ground rod interlock of claim 8, wherein: The valve interlocking mechanism (7) further comprises a self-locking assembly, which comprises a locking plate (717) and a locking shaft (714) arranged on the toggle arm (710), the locking plate (717) is configured to be deflected by elastic force and clamped into the locking shaft (714) in the reset state of the vacuum contactor trolley moving out, so as to limit the rotation of the toggle arm (710).

10. The switch room interlock and ground rod interlock of claim 1, wherein: The contactor cabinet (1) further comprises a front middle door (14), and a locking assembly one (5) is arranged on the front middle door (14), the locking assembly one (5) comprises a lock box (51), a gear transmission structure and two groups of link plates (52) relatively sliding driven by the gear transmission structure, and the end of the link plate (52) is configured to be inserted into the jack on the shell (11) to realize the locking of the front middle door (14).

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