Switching chamber interlocking mechanism and ground blade interlocking mechanism

Abstract

The application discloses a switch room interlocking mechanism and a ground knife interlocking mechanism and belongs to the field of power distribution equipment. The switch room interlocking mechanism comprises a contactor cabinet and a first interlocking mechanism arranged in the shell. The first interlocking mechanism comprises a ground knife operation shaft and a linkage shaft in mesh transmission with the end bevel gear of the ground knife operation shaft. The linkage shaft is fixed with a linkage plate one in a triangular structure. The linkage plate one serves as a transmission center and drives the second and third interlocking mechanisms through a connecting rod assembly to convert the state of the ground switch into mechanical locking of front and rear doors. The application further comprises a locking assembly two. The locking assembly two directly drives a locking rod to deflect and rise to block a handcart by using the movement of a ground knife operation hole shielding plate. The switch room interlocking mechanism and the ground knife interlocking mechanism are divided by a bevel gear rigid reversing and a triangular linkage plate. The forced synchronization of the ground switch and the locking of front and rear cabinet doors is realized. The active linkage of the shielding plate and the locking rod forms a safe logic of operation and locking. The safety of the equipment is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power distribution equipment, in particular to a switch chamber interlocking mechanism and a grounding knife interlocking mechanism. BACKGROUND

[0002] In an armored movable AC metal-enclosed switchgear, in order to prevent the operator from entering the live compartment in the dangerous state of not being powered off and not being grounded, a strict mechanical interlocking device is usually required to be arranged between the operating shaft of the grounding switch and the cabinet door leading to the cable chamber. The core logic is that the cabinet door can only be opened when the grounding switch is in the closed state; the cabinet door must be forcibly locked when the grounding switch is in the open state.

[0003] As a patent with the authorization announcement number CN110993420B discloses a safety interlocking device of a switch cabinet, which comprises an operating shaft, a rear door interlocking mechanism and a front lower door interlocking mechanism. The rear door interlocking mechanism mainly comprises a lock rod, a lock hook and an elastic pressing mechanism, which are used in cooperation with the stop block on the operating shaft, and the front lower door interlocking mechanism mainly comprises a lifting rod, a lock plate with a lock slot and an elastic reset mechanism, which are used in cooperation with the cam on the operating shaft. The device limits the reset of the lock rod to maintain the locking of the rear door through the stop block on the operating shaft, and drives the lock plate to move vertically and reset through the lifting rod extruded by the rotation of the operating shaft and the cam, so as to realize the clamping and disengagement of the front lower door lock pin.

[0004] Although the above-mentioned prior art realizes the interlocking of the grounding switch and the front and rear doors to some extent, since the interlocking logic depends on the reset force of the elastic element and the indirect passive blocking structure, if the spring appears metal fatigue, rust and fracture, or the transmission rod is stuck due to the deformation caused by dust accumulation, the lock cannot be returned to the position, thereby causing the cabinet door to be false-locked or the interlocking to fail. Moreover, the transmission systems of the front lower door and the rear door are independent and dispersed, the front lower door relies on the cam to drive the lifting rod to move vertically, and the rear door relies on the stop block to limit the displacement of the horizontal rod. The two not only have different movement forms, but also are far apart in physical position, and lack a unified and rigid transmission hub for mechanical connection in between, which leads to poor synchronization of the front and rear doors, and increases the difficulty of debugging and operation and maintenance of the equipment.

[0005] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background of the present application, and therefore, it can include information that does not constitute the prior art. SUMMARY

[0006] The switch chamber interlocking mechanism and the grounding knife interlocking mechanism provided by the embodiments of the present application solve the technical problems of insufficient reliability caused by the interlocking logic depending on the reset of the elastic element and passive blocking in the prior art, and poor synchronization caused by the dispersed transmission systems of the front and rear doors.

[0007] The embodiment of the present application adopts the following technical scheme: a switch chamber interlocking mechanism and a ground knife interlocking mechanism, mainly comprising a contactor cabinet, the contactor cabinet has a shell, the inner wall of the shell is provided with a front middle partition plate one, a pull-out partition plate is arranged below the front middle partition plate one; a first interlocking mechanism is arranged in the shell, the first interlocking mechanism comprises a driving part and a linkage part in transmission connection with the driving part, the driving part comprises a ground knife operating shaft for driving the opening and closing of a grounding switch and a bevel gear one fixed to the end of the ground knife operating shaft; the linkage part comprises a linkage shaft arranged perpendicularly to the ground knife operating shaft, the linkage shaft is provided with a bevel gear two in meshing transmission with the bevel gear one, and the linkage shaft is fixedly sleeved with a linkage plate one; a second interlocking mechanism is mechanically connected with the linkage plate one through a connecting rod assembly one and is configured to convert the opening and closing state of the grounding switch into mechanical locking of a front lower door by rotating the linkage plate one; a third interlocking mechanism is mechanically connected with the linkage plate one through a connecting rod assembly two and is configured to convert the opening and closing state of the grounding switch into mechanical locking of a rear lower door by rotating the linkage plate one; wherein the linkage plate one is designed in a triangular structure and serves as a unified transmission hub to drive the second interlocking mechanism and the third interlocking mechanism to move synchronously; a locking assembly two comprises a locking rod movably arranged on the front middle partition plate one and a shielding plate slidably arranged on the pull-out partition plate, an operating hole one is formed in the pull-out partition plate, and the shielding plate is configured to drive the locking rod to displace to block the movement of a vacuum contactor handcart when the shielding plate moves to expose the operating hole one.

[0008] Further, the linkage plate one is provided with a protruding shaft arranged eccentrically, the first interlocking mechanism further comprises a connecting rod one and a connecting rod two, one end of the connecting rod one is movably sleeved on the protruding shaft, the other end is movably connected with one end of the connecting rod two, and a rigid transmission chain for transmitting the rotary motion of the linkage plate one outward is formed.

[0009] Further, a rotating part is further included, the rotating part comprises a mounting piece, a movable shaft, a connecting block, a connecting rod three, a support frame, a central shaft and an operation indication plate; the mounting piece and the support frame are fixed to a supporting plate arranged on the side of the pull-out partition plate, the movable shaft is rotatably connected to the mounting piece and movably connected with the other end of the connecting rod two away from the connecting rod one, the connecting block is fixedly arranged on the movable shaft, one end of the connecting rod three is movably connected with the connecting block, and the other end is movably connected with the operation indication plate, and the operation indication plate is rotatably arranged on the central shaft of the support frame, so that the operation indication plate is switched to display the state by the rotation of the ground knife operating shaft.

[0010] Further, the second interlocking mechanism comprises a guide bracket, a bent plate, a vertical plate, an embedded shaft and the linkage assembly one; the linkage assembly one comprises a linkage one, a linkage two, a connecting piece and a movable shaft; one end of the linkage one is connected to the linkage plate one, and the other end is connected to the linkage two, the linkage two drives the movable shaft to rotate through the connecting piece; the guide bracket is fixed to the side of the support frame, the bent plate is slidably arranged on the guide bracket, one end of the bent plate is provided with a blocking end suitable for blocking the opening of the front lower door, and the other end is provided with a clamping groove, the vertical plate is fixedly arranged on the movable shaft, and the embedded shaft is fixedly arranged 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 clamping groove, the sliding of the bent plate is limited, and the blocking end remains to extend into the opening path of the front lower door.

[0011] Further, the third interlocking mechanism comprises a lock rod, a reverse locking plate and the linkage assembly two; the linkage assembly two comprises a right-angle piece, a linkage six, a linkage seven, a bracket one and a linkage five; the lock rod is installed on the inner side of the rear lower door, the middle part of the linkage seven is rotatably connected to the bracket one fixed on the shell, one end of the linkage 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 linkage six is slidably arranged on the right-angle piece fixed on the shell, and two ends of the linkage six are respectively connected to the linkage seven and the linkage five; the linkage five drives the reverse locking plate to act, so that the reverse locking plate is locked or separated from the lock rod.

[0012] Further, the second interlocking mechanism comprises a guide bracket, a bent plate, a vertical plate, an embedded shaft and the linkage assembly one; the linkage assembly one comprises a linkage one, a linkage two, a connecting piece and a movable shaft; one end of the linkage one is connected to the linkage plate one, and the other end is connected to the linkage two, the linkage two drives the movable shaft to rotate through the connecting piece; the guide bracket is fixed to the side of the support frame, the bent plate is slidably arranged on the guide bracket, one end of the bent plate is provided with a blocking end suitable for blocking the opening of the front lower door, and the other end is provided with a clamping groove, the vertical plate is fixedly arranged on the movable shaft, and the embedded shaft is fixedly arranged 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 clamping groove, the sliding of the bent plate is limited, and the blocking end remains to extend into the opening path of the front lower door.

[0013] Further, the locking assembly two further comprises a guide seat and a fulcrum seat fixed to the front middle partition plate one, one end of the locking rod is limited by the fulcrum seat to form a rotating fulcrum, and the other end is movably constrained in the guide seat, the shielding plate has a protruding portion extending upward, the front middle partition plate one is provided with a slot through which the protruding portion passes, and the linkage of the shielding plate and the locking rod is configured such that when the shielding plate moves, the protruding portion passes through the slot to push one end of the locking rod, so that the locking rod is deflected and raised with the fulcrum seat as the fulcrum.

[0014] Further, the front middle partition plate is provided with a valve interlocking mechanism, the valve interlocking mechanism comprises a valve guide rod, a valve part slidingly arranged on the valve guide rod, and a connecting rod assembly driving the valve part to lift, the connecting rod assembly comprises a crank arm arranged rotatably, and the crank arm is configured to rotate under the action of the pushing force of the vacuum contactor trolley to drive the valve part to open.

[0015] Further, the valve interlocking mechanism further comprises a self-locking assembly, the self-locking assembly comprises a locking plate and a locking shaft arranged on the crank arm, and the locking plate is configured to be deflected by the elastic force and clamped into the locking shaft in the reset state of the vacuum contactor trolley moving out, so as to limit the rotation of the crank arm.

[0016] Further, the contactor cabinet further comprises a front middle door, and the front middle door is provided with a locking assembly one, the locking assembly one comprises a lock box, a gear transmission structure and two groups of link plates sliding relative to each other driven by the gear transmission structure, and the end of the link plate is configured to be inserted into the insertion hole on the shell to realize the locking of the front middle door.

[0017] The above technical scheme adopted by the embodiment of the present application can achieve the following beneficial effects:

[0018] The switch chamber interlocking mechanism and the ground knife interlocking mechanism abandon the traditional interlocking mode of relying on cam friction transmission, spring reset and passive blocking of the stop block in the prior art, adopt a bevel gear rigid reversing matching triangular linkage plate as a unified transmission hub, the rotating power of the ground knife operation shaft is forcibly shunted by the triangular linkage plate, and the front and rear door locks are actively pushed / pulled through the connecting rod mechanism, this design not only completely eliminates the safety hazard of false locking of the cabinet door caused by spring fatigue failure, but also ensures that the actions of the front lower door and the rear lower door are absolutely synchronous in mechanism, effectively solves the problem of different timing of the front and rear door interlocking, and only when the grounding switch is fully closed, the front and rear doors are unlocked at the same time, thereby fundamentally eliminating the safety blind area of the personnel mistakenly entering the live compartment from the back of the cabinet.

[0019] The present application forms a safe logic of operation and locking through the ingenious linkage design of the operation hole shielding plate and the locking rod, when the operator moves the shielding plate to prepare to operate the grounding switch, the locking rod will be displaced by driving the protruding part, and a rigid physical barrier is formed on the moving path of the vacuum contactor trolley. This design forcibly stipulates the operation sequence by using a pure mechanical structure without increasing the electrical locking, thereby eliminating the risk of misoperation of pushing the trolley in the grounding state.

[0020] The application realizes positioning of the handcart main shaft nut through cooperation of the concave frame assembly and the interlocking plate, and forms double locking through cooperation of the blocking of the locking rod, effectively limiting accidental movement of the handcart in the test / working position. In addition, the linkage mechanism drives the fan-shaped operation indicator plate to move synchronously with the ground knife operation shaft, and the current "split" and "closed" states of the grounding switch can be directly and clearly displayed through the observation window. This pure mechanical hard connection indication does not depend on the secondary power supply, avoids misjudgment caused by signal transmission errors, and further guarantees the judgment accuracy and operation safety of the operation and maintenance personnel. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application. The drawings illustrate embodiments of the application and, together with the description, serve to explain the principles of the application without imposing undue limitation on the application.

[0022] In the drawings:

[0023] Figure 1 It is a schematic diagram of the overall switch room interlocking mechanism and the ground knife interlocking mechanism in the application;

[0024] Figure 2 It is a schematic diagram of the overall switch room interlocking mechanism and the ground knife interlocking mechanism in the application; Figure 1

[0025] Figure 3 It is a schematic diagram of the overall switch room interlocking mechanism and the ground knife interlocking mechanism in the application; Figure 2

[0026] Figure 4 It is an enlarged view of A in the application; Figure 3

[0027] Figure 5 It is a schematic diagram of the first interlocking mechanism in the application; Figure 3

[0028] Figure 6 It is a schematic diagram of the third interlocking mechanism in the application; Figure 3

[0029] Figure 7 It is a schematic diagram of the overall switch room interlocking mechanism and the ground knife interlocking mechanism in the application; Figure 3

[0030] Figure 8 It is an enlarged view of B in the application; Figure 7

[0031] Figure 9 It is a schematic diagram of the overall switch room interlocking mechanism and the ground knife interlocking mechanism in the application; Figure 7

[0032] Figure 10 It is a schematic diagram of the second locking assembly in the application; Figure 3

[0033] Figure 11 ​​​​​​​​​Fig. 1 is a perspective view of the contactor cabinet according to the present application; Figure 9 Fig. 2 is a schematic view of the interlock mechanism of the contactor cabinet according to the present application;

[0034] Figure 12 Fig. 3 is a left view of the contactor cabinet according to the present application; Figure 11

[0035] Figure 13 Fig. 4 is a schematic view of the partial structure of the contactor cabinet according to the present application; Figure 9

[0036] Reference signs:

[0037] 1. contactor cabinet; 11. housing; 12. hoisting plate; 13. instrument door; 14. front middle door; 142. operating hole two; 143. lever; 144. sliding groove; 15. pull-out partition; 151. lock hole part; 152. open slot; 154. waist groove one; 155. lever; 156. operating hole one; 157. shielding plate; 158. bracket; 16. front lower door; 17. front middle partition one; 171. support frame; 172. notch; 18. rear lower door; 2. first interlock mechanism; 21. ground knife operating shaft; 22. mounting frame; 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 part; 213. bracket; 214. mounting part; 215. movable shaft; 216. connecting block; 217. connecting rod three; 218. operating indicator; 219. central shaft; 220. support plate; 221. embedded shaft; 222. support frame; 223. vertical plate; 3. second interlock mechanism; 32. guide support; 33. blocking end; 34. bent plate; 35. clamping groove; 4. third interlock mechanism; 41. lock rod; 42. reverse locking plate; 43. shaft rod; 44. connecting rod five; 45. bracket plate one; 46. connecting rod six; 47. right-angle part; 48. connecting rod seven; 481. waist groove two; 49. bracket one; 5. first locking assembly; 51. lock box; 52. connecting plate; 53. key; 54. connecting shaft; 6. second locking assembly; 61. guide seat; 62. locking rod; 63. fulcrum seat; 64. concave frame; 65. rotating shaft; 66. elastic stop ring; 67. elastic sheet; 68. interlocking plate two; 7. interlock mechanism of the door; 71. right-angle frame; 72. door guide rod; 74. door part; 75. fixed support; 77. cover plate; 78. connecting rod eight; 710. crank arm; 711. shaft sleeve; 713. limiting shaft; 714. locking shaft; 715. shaft part; 716. spring three; 717. interlocking plate; 718. side plate part; 723. block. DETAILED DESCRIPTION

[0038] ​​In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined purposes, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0039] The technical solutions provided by the embodiments of the present application are described in detail below in combination with the drawings.

[0040] The present embodiment is applied to the vacuum contactor handcart in the prior art, which comprises a frame, a contact, a fuse, a secondary plug, various types of state indicators and other conventional general components, and the key lies in that it is provided with a handcart shake-in and shake-out operation hole, a valve operating plate and a main shaft nut located at the front end of the chassis, which cooperate with the present application. Among them, the operation hole cooperates with the handle to realize the movement of the handcart between the test / working position, the valve operating plate is used to trigger the action of the valve interlocking mechanism 7 of the present application during movement, and the main shaft nut is configured to cooperate with the locking assembly two 6 of the present application when the handcart is in the test position, so as to realize the positioning and locking of the handcart.

[0041] Referring to Figures 1-3 As shown in the drawings, the switch chamber interlocking mechanism and the ground knife interlocking mechanism provided by the embodiments of the present application comprise a contactor cabinet 1, which has a shell 11 with a contactor chamber inside, and the front end of the contactor cabinet 1 is sequentially provided from top to bottom with an instrument door 13, a front middle door 14, a pull-out partition plate 15 and a front lower door 16, and a rear lower door 18 is arranged on the opposite side of the front lower door 16 on the contactor cabinet 1. The instrument door 13 can be installed with instruments to facilitate observation of the operating parameters of the contactor cabinet 1; the front middle door 14 and the front lower door 16 facilitate maintenance and repair of the components in different internal regions; at the same time, a lifting plate 12 is fixed on the top surface of the shell 11 to facilitate lifting operation during transportation and installation of the contactor cabinet 1.

[0042] As shown in Figures 2-5 and Figure 13 An operation hole one 156 is provided on the pull-out partition plate 15, which provides an operation channel for the grounding switch operating handle, and a lock hole piece 151 is fixed on the pull-out partition plate 15 above the operation hole one 156, which is used to guide the operation of the grounding switch operating handle, and a first interlocking mechanism 2 is arranged in the shell 11, which is used to realize interlocking control of the grounding switch to ensure operation safety.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] Meanwhile, a fixed sleeve is arranged on one side of the adapter 212 on the movable shaft 215, and a connecting block 216 is arranged on the fixed sleeve, one end of the connecting block 216 is movably connected with a connecting rod three 217, the rotation of the movable shaft 215 can drive the connecting rod three 217 to move through the connecting block 216, and a supporting frame 222 is fixed on the bottom surface of the supporting plate 213, the supporting frame 222 is in a concave structure, a supporting plate 220 is fixed on the inner side of the supporting frame 222, a bearing is arranged between the inner wall top end of the supporting frame 222 and the supporting plate 220, and a central shaft 219 is rotatably arranged in the supporting frame 222.

[0048] An operation indicator 218 is fixedly sleeved on the central shaft 219, the operation indicator 218 is in a fan-shaped structure, and the surface of the operation indicator 218 is provided with “split” and “close” characters, which are used to directly display the operation state of the grounding switch, and one end of the connecting rod three 217 is movably connected with the operation indicator 218, the movement of the connecting rod three 217 can drive the operation indicator 218 to rotate around the central shaft 219, so as to switch the “split” and “close” display states.

[0049] When the grounding switch operation handle is operated, the handle is inserted into the hexagonal butt joint hole at one end of the earth knife operation shaft 21 through the operation hole one 156 on the partition plate 15, the handle is rotated counterclockwise, the earth knife operation shaft 21 is rotated, the bevel gear one 24 at one end of the earth knife operation shaft 21 drives the meshing bevel gear two 26 to rotate, and then the linkage shaft 25 is rotated, the triangular structure linkage plate one 28 on the linkage shaft 25 is rotated, the protruding shaft 29 at the corner of the triangular structure linkage plate one 28 drives the connecting rod one 210 to move, the connecting rod one 210 drives the connecting rod two 211 to move synchronously, the connecting rod two 211 drives the movable shaft 215 to rotate through the adapter 212, the connecting block 216 on the movable shaft 215 drives the connecting rod three 217 to move, the connecting rod three 217 drives the fan-shaped operation indicator 218 to rotate around the central shaft 219, and the “split” and “close” display states are switched, so that the state switching of the grounding switch from the closed state to the split state is directly presented, and the operation safety and accuracy are ensured.

[0050] As shown in Figure 1 and Figures 4-5 , a second interlocking mechanism 3 is arranged on the side of the supporting frame 222, the second interlocking mechanism 3 is used to realize the interlocking control between the grounding switch and the front lower door 16, and ensure the operation safety, the second interlocking mechanism 3 mainly includes a connecting rod assembly one and cooperatively used guide support 32, bent plate 34, vertical plate 223 and embedded shaft 221. The connecting rod assembly one includes the connecting rod one 210, the connecting rod two 211, the adapter 212 and the movable shaft 215, one end of the connecting rod one 210 is connected to the linkage plate one 28, the movable shaft 215 is driven to rotate through the transmission of the connecting rod two 211 and the adapter 212, and the power of the grounding switch operation shaft is transmitted to the locking end.

[0051] At the locking end, the guide bracket 32 is fixed to the side of the support frame 222, the guide bracket 32 is concave, and a bent plate 34 is transversely and movably penetrated on both vertical ends of the guide bracket 32, the bent plate 34 is horizontally movable on the guide bracket 32, and one end of the bent plate 34 has a blocking end 33, and the other end has a vertical end with a clamping groove 35, and a vertical plate 223 is fixed on the movable shaft 215, the vertical plate 223 moves with the rotation of the movable shaft 215, and an embedded shaft 221 adapted for use with the clamping groove 35 is fixed on the vertical plate 223;

[0052] When the embedded shaft 221 is embedded in the clamping groove 35, the movement of the bent plate 34 can be limited, and a bracket body (not shown in the figure) adapted to contact the lower surface of the blocking end 33 is arranged on the inner side of the front lower door 16 to limit the upward sliding opening of the front lower door 16.

[0053] When the grounding switch is in the open state, under the action of the second interlocking mechanism 3, the movable shaft 215 rotates to drive the vertical plate 223 to move, so that the embedded shaft 221 is embedded in the clamping groove 35 of the bent plate 34 to limit the movement of the bent plate 34, and at the same time, the bracket body on the inner side of the front lower door 16 is blocked by the blocking end 33, so that the front lower door 16 cannot move upward and cannot be opened, thereby ensuring the safety of operation; when the grounding switch is closed, the movable shaft 215 rotates to allow the vertical plate 223 to drive the embedded shaft 221 to move away from the lowest end of the clamping groove 35, thereby releasing the limitation on the bent plate 34, and the bracket body and the bent plate 34 are unlocked, and the front lower door 16 can move upward and can be opened, thereby realizing the interlocking control between the grounding switch and the front lower door 16 and ensuring the safety and order of the operation process. Figure 4

[0054] As shown in Figures 2-3 and Figure 6 , the third interlocking mechanism 4 is connected between the linkage plate one 28 and the rear lower door 18, and is used to realize the interlocking control between the grounding switch and the rear lower door 18 and ensure the safety of operation. The third interlocking mechanism 4 mainly includes a second linkage assembly and a lock rod 41 and a reverse locking plate 42 matched therewith. The second linkage assembly is used for transmitting mechanical transmission, and specifically includes a right-angle piece 47, a sixth linkage rod 46, a seventh linkage rod 48, a bracket one 49, and a fifth linkage rod 44.

[0055] ​Specifically, the lock rod 41 has a hooking part one on the inner side of the rear lower door 18, and a right-angle piece 47 is fixed to the inner wall side of the shell 11 as part of the linkage assembly two, a horizontally arranged linkage six 46 is movably penetrated on the vertical end of the right-angle piece 47, and the linkage six 46 can move horizontally on the right-angle piece 47. A linkage seven 48 is movably connected to one end of the linkage six 46, and a waist groove two 481 is formed on the linkage seven 48 close to the one end position, which is movably sleeved on the protruding shaft 29 of the linkage plate one 28, and the movement of the linkage six 46 can drive the movement of the linkage seven 48.

[0056] And a bracket one 49 is fixed to the inner wall side of the shell 11, and the linkage seven 48 is movably arranged at the central position of the bracket one 49, which provides a rotating fulcrum for the linkage seven 48. In the end transmission path of the linkage assembly two, a linkage five 44 is movably connected to the other end of the linkage six 46, and the movement of the linkage six 46 can be transmitted through the linkage five 44. A bracket plate one 45 is fixed to one end of the linkage five 44, which provides a mounting basis for the linkage five 44. At the same time, a reverse locking plate 42 is movably arranged on one end of the linkage five 44 through a shaft rod 43, which is matched with the lock rod 41 for locking.

[0057] When the reverse locking plate 42 is matched with the hooking part one of the lock rod 41, the opening of the rear lower door 18 can be limited, and a spring two (not shown in the figure) is connected to the bottom end of the reverse locking plate 42, which is connected to the inner wall of the shell 11, and provides a restoring force for the reverse locking plate 42.

[0058] When the grounding switch is in the open state, the ground knife operating shaft 21 rotates to drive the linkage seven 48 to move through the linkage relationship. Since the linkage seven 48 takes the bracket one 49 as the rotating fulcrum, and the waist groove two 481 is movably sleeved on the protruding shaft 29, the movement of one end of the linkage seven 48 promotes the horizontal sliding of the linkage six 46 on the right-angle piece 47 to the left, and further pushes the linkage five 44 to link. At this time, the linkage five 44 drives the reverse locking plate 42 to move downward against the elastic force of the spring two, so that the reverse locking plate 42 is matched with the hooking part one on the lock rod 41 and locked, thereby limiting the opening of the rear lower door 18, ensuring that the rear lower door 18 cannot be opened when the grounding switch is open, to form reliable safety protection and effectively avoid safety risks caused by the mistaken opening of the rear lower door 18.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] When the key 53 is rotated in the reverse direction to the unlocking direction, the transmission gear reversely drives the two sets of engaging plates 52 to move in opposite directions (move closer to each other), and the engaging shaft 54 is retracted inward with the engaging plates 52 and exits the insertion hole of the support frame 171. Through the mechanical linkage of the rotation driving of the key 53 to the internal transmission structure of the lock box 51, the relative sliding of the two sets of engaging plates 52 is realized, and then the locking and unlocking actions of the front middle door 14 are completed. In this way, through the linkage of the engaging plates 52 and the engaging shaft 54 operated by the key 53, the locking and unlocking of the front middle door 14 are realized, and the safety and convenience of the operation are ensured.

[0064] As shown in Figures 9-10 An operation hole two 142 is formed in the front middle door 14 for the vacuum contactor operation handle to pass through, and a shielding part one is arranged on the front middle door 14 to shield the operation hole two 142, prevent misoperation or foreign matter from entering, and ensure the operation safety. The shielding part one includes a push rod 143 slidingly arranged on the front middle door 14, one end of the push rod 143 is connected with an operation hole shielding piece (not marked in the figure), and the operation hole shielding piece is used to shield the operation hole two 142. The push rod 143 penetrates through the front middle door 14 and is arranged, and a sliding groove 144 is formed in the front middle door 14 for the push rod 143 to slide, the sliding groove 144 provides guidance for the sliding of the push rod 143. When the vacuum contactor needs to be operated, the push rod 143 can be slid to the left to make the operation hole shielding piece away from the operation hole two 142, so as to facilitate the operation handle to pass through; when it is not needed to be operated, the push rod 143 is slid to the right in the sliding groove 144, and the operation hole two 142 is shielded by the operation hole shielding piece to avoid misoperation.

[0065] Meanwhile, a shielding part two is arranged on the pull-out partition plate 15 to shield the operation hole one 156, and the shielding part two is used to prevent the operation hole one 156 from being mistakenly touched or foreign matter entering in the non-operation state. The shielding part two includes a shielding plate 157 slidingly arranged on the inner side of the pull-out partition plate 15, and the shielding plate 157 is used to shield the operation hole one 156. The shielding plate 157 has a push rod 155 on the surface, the push rod 155 facilitates the staff to operate the sliding of the shielding plate 157, the push rod 155 penetrates through the pull-out partition plate 15 and is arranged, and a waist groove one 154 is formed in the pull-out partition plate 15 to provide a sliding space for the push rod 155, the waist groove one 154 provides space and guidance for the sliding of the push rod 155. Meanwhile, an open slot 152 is formed in the pull-out partition plate 15, which facilitates the staff to check the “division” and “combination” characters on the operation instruction plate 218 and timely understand the equipment operation state. In the actual operation scene, the shielding and opening of the operation hole two 142 and the operation hole one 156 can be realized by pushing the push rod 143 and the push rod 155, which not only ensures the convenience of operation, but also improves the safety of equipment operation.

[0066] Continuing to refer to Figures 9-10As shown, the locking assembly two 6 is arranged on the front middle partition plate one 17, and is used for locking the vacuum contactor handcart, ensuring that the vacuum contactor handcart is in a proper state, and ensuring the safe operation of the contactor cabinet 1. The locking assembly two 6 includes a locking part one arranged on the front middle partition plate one 17, and used for realizing preliminary locking linkage. The locking part one includes a concave frame 64 arranged on the front middle partition plate one 17, and an interlocking plate two 68 movably connected to the concave frame 64 through a rotating shaft 65. The rotating shaft 65 is sleeved with an elastic stop ring 66, and the elastic stop ring 66 is used for axially limiting the rotating shaft 65 to prevent it from falling off during movement. The interlocking plate two 68 can rotate around the rotating shaft 65, and is nested in the concave frame 64. An elastic piece 67 is arranged between one end of the interlocking plate two 68 and the front middle partition plate one 17, and provides elastic support for the interlocking plate two 68, so that the interlocking plate two 68 is kept in the initial position, and facilitates subsequent linkage operation.

[0067] And the locking part two is arranged on the front middle partition plate one 17 on the side of the locking part one, and is used for cooperating with the locking part one to realize locking of the vacuum contactor handcart. The locking part two includes a guide seat 61 fixed on the front middle partition plate one 17 on the side of the locking part one, and the guide seat 61 is concave and has a U-shaped groove. A fulcrum seat 63 is fixed on the front middle partition plate one 17, and provides support for one end of a locking rod 62. The locking rod 62 is movably arranged between the guide seat 61 and the fulcrum seat 63, and can move between the guide seat 61 and the fulcrum seat 63. Both ends of the locking rod 62 have bent ends, one end of which is limited by the vertical section of the fulcrum seat 63, and the other end is placed in the U-shaped groove.

[0068] Meanwhile, the shielding plate 157 extends upwardly with a protruding part (not shown in the figure), which penetrates the front middle partition plate one 17, and a slot 172 is formed in the front middle partition plate one 17 for the protruding part to pass through. The protruding part supports and contacts the bent end of one end of the locking rod 62.

[0069] When the vacuum contactor trolley is in a state requiring locking, such as the test position, and the grounding switch is closed, the shielding plate 157 is in a specific position, the protruding part on the shielding plate 157 passes through the notch 172 on the front middle partition plate one 17, abuts and lifts the bent end of one 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, the whole body is displaced, the bent end of the front end is lifted, and the front end of the bottom of the vacuum contactor trolley is just formed into a rigid block. At this time, even if the operator rotates the handle of the trolley rocking mechanism, tries to push the trolley from the test position to the working position, it will not be able to complete the action due to the physical block of the locking rod 62, the movement of the vacuum contactor trolley on the track is completely limited, and the main circuit in the cabinet cannot be connected, thereby avoiding the risk of short circuit caused by the trolley mistakenly entering the working position when the grounding switch is closed.

[0070] When the vacuum contactor trolley is pushed into the contactor cabinet 1 from the transfer trolley and reaches the test position, the main shaft nut of the vacuum contactor trolley will slide into the U-shaped groove of the concave bracket 64 on the front middle partition plate one 17. At this time, the interlocking plate two 68 arranged on the concave bracket 64 is deflected downward under the reset elastic force of the elastic sheet 67 and abuts on the surface of the main shaft nut, thereby cooperating with the concave bracket 64 to form a double locking mechanism.

[0071] By using the U-shaped structure of the concave bracket 64 to limit the transverse displacement of the main shaft nut, cooperating with the elastic pressing action of the interlocking plate two 68 to realize positioning, the posture of the vacuum contactor trolley in the test position is stabilized, and transverse movement or accidental sliding out due to vibration or accidental touch is prevented. On the other hand, the positioning action and the blocking action of the locking rod 62 are complementary, the main shaft nut and the concave bracket 64 component lock the position stability of the trolley, and the locking rod 62 rigidly blocks the moving path of the trolley to the working position in front, and the two together form a reliable mechanical interlocking system, so that the trolley cannot retreat or move forward at this time, and the stability and safety of the trolley in the transfer and test links are ensured.

[0072] As shown in Figures 11-12 The shutter interlocking mechanism 7 is arranged on the front middle partition plate one 17, the shutter interlocking mechanism 7 includes two groups of right angle frames 71 fixed on the inner wall of the shell 11 and the front middle partition plate one 17 near the two ends respectively, a shutter guide rod 72 is fixed between the two groups of vertically arranged right angle frames 71, and a shutter part 74 is connected and arranged on the two groups of shutter guide rods 72, the shutter guide rod 72 provides guidance for the movement of the shutter part 74, the shutter part 74 can move along the shutter guide rod 72, and a fixed support 75 is sleeved and arranged on the two groups of shutter guide rods 72 respectively.

[0073] Meanwhile, the two groups of fixed supports 75 are connected with cover plates 77, the cover plates 77 play a protective role, in order to drive the valve plate 74 to lift and open, the embodiment is provided with a third connecting rod assembly, the third connecting rod assembly specifically includes connecting rod eight 78 and crank arm 710. Among them, the connecting rod eight 78 is used for transmitting motion, one end of the connecting rod eight 78 movably connects with the crank arm 710, and the other end of the connecting rod eight 78 movably connects with the fixed support 75, the side plate 718 is arranged on the inner wall of the shell 11 on both sides, one end of the crank arm 710 movably passes through the side plate 718 and is arranged, and the crank arm 710 is movably connected with the side plate 718 through the shaft 715, the shaft 715 provides a fulcrum for the rotation of the crank arm 710.

[0074] Further, in order to prevent the valve from misoperation, the valve interlocking mechanism 7 is also provided with a self-locking assembly, the self-locking assembly specifically includes a locking plate 717 and a locking shaft 714, the locking plate 717 is movably connected on the side of the side plate 718, the locking plate 717 is used for cooperating with the crank arm 710 to realize locking, the locking plate 717 is connected with the close end of the crank arm 710 through the spring three 716, the spring three 716 provides a reset elastic force for the locking plate 717, meanwhile, the limiting shaft 713 is penetrated through the crank arm 710, the limiting shaft 713 is movably connected with the inner wall side of the side plate 718, the limiting shaft 713 is used for limiting the movement range of the crank arm 710.

[0075] One end of the limiting shaft 713 has a shaft sleeve 711, the shaft sleeve 711 plays a protection role, meanwhile, the locking shaft 714 belonging to the above-mentioned self-locking assembly is arranged on the side of the crank arm 710, and the locking plate 717 has a notch part on one end, the notch part is used for cooperating with the locking shaft 714, meanwhile, the block 723 is fixed on the side of the two groups of side plates 718, the block 723 plays a limiting role.

[0076] When the vacuum contactor handcart advances from the test position to the working position, the valve operating plate of the vacuum contactor handcart first contacts and extrudes the locking plate 717 in the self-locking assembly, under the extrusion force, the locking plate 717 moves upward, and then the locking between the locking plate 717 and the locking shaft 714 is unlocked; subsequently, the handcart continues to drive the crank arm 710 to rotate around the shaft 715 as a fulcrum, the rotation of the crank arm 710 transmits motion through the connecting rod eight 78, the connecting rod eight 78 pulls the fixed support 75, so that the valve plate 74 slides upward along the valve guide rod 72, to open the valve plate 74, and provide a channel for the vacuum contactor handcart to enter the working position.

[0077] When the vacuum contactor handcart retreats from the working position to the test position, the extrusion force of the valve operating plate on the interlocking plate 717 gradually disappears, at this time, the valve part 74 loses the upward pulling force and automatically resets downward along the valve guide rod 72 by its own gravity, realizing the closing of the valve part 74. At the same time, the interlocking plate 717 resets downward under the elastic force of the spring three 716, cooperates with the locking shaft 714 on the crank arm 710 again, reenters the self-locking state, to ensure that the valve part 74 remains closed in the non-operating state, prevents foreign matter from entering or misoperation from causing safety accidents, and realizes the interlocking control of the valve part 74 and the vacuum contactor handcart operation.

[0078] Working principle: when in use, the grounding switch operating handle is inserted into the operating hole one 156 on the pull-out partition plate 15, guided into the butt joint hole of the ground knife operating shaft 21 through the lock hole part 151, and the handle is turned to drive the ground knife operating shaft 21 to rotate, the ground knife operating shaft 21 drives the bevel gear one 24 and the bevel gear two 26 to mesh transmission, so that the linkage shaft 25 rotates, the linkage plate one 28 on the linkage shaft 25 drives the connecting rod one 210 and the connecting rod two 211 to move in turn through the protruding shaft 29, the connecting rod two 211 drives the movable shaft 215 to rotate through the connecting part 212, the movable shaft 215 further drives the fan-shaped operating indicator 218 to rotate around the center shaft 219 through the connecting block 216 and the connecting rod three 217, so as to switch the display of "on" and "off" words, which realizes the switching and synchronous intuitive feedback of the grounding switch on-off state, and guarantees the accuracy of the operation state confirmation.

[0079] In the above process, the second interlocking mechanism 3 and the third interlocking mechanism 4 act synchronously to realize the interlocking of the grounding switch and the front lower door 16 and the rear lower door 18. When the grounding switch is in the on-off state, that is, the cabinet is electrified, 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 clamped into the clamping groove 35 of the bent plate 34, locks the position of the bent plate 34, and keeps the blocking end 33 from blocking the inside support body of the front lower door 16, preventing the front lower door 16 from being opened. At the same time, in the third interlocking mechanism 4, the linkage plate one 28 drives the connecting rod seven 48, the connecting rod six 46 and the connecting rod five 44 linkage through the protruding shaft 29, drives the reverse locking plate 42 to overcome the spring force and hook with the locking rod 41 on the rear lower door 18 to lock, prohibits the rear lower door 18 from being opened. It is worth mentioning that the locking of the rear lower door 18 in this scheme is realized by rigid driving downward, and the unlocking relies on the spring force reset. This design conforms to the "fail-safe" principle, that is, even if the reset spring breaks down, the reverse locking plate 42 will not automatically fall off and unlock, ensuring that the cabinet door is still in a safe state of locking under unknown faults.

[0080] The second interlocking mechanism 3 and the third interlocking mechanism 4 force the door to be 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 switch operating shaft 21 is rotated into position, the interlocking mechanism will release the door lock. This requires the operator to perform the safety action of closing the grounding switch first, and then obtain the permission to open the door, thereby avoiding the possibility of misoperation from the process.

[0081] When the grounding switch is in the closed state, the mechanisms are reversely linked, the embedded shaft 221 is separated from the lowest end of the clamping groove 35, the bent plate 34 is unlocked and displaced, the opening restriction of the front lower door 16 is released, at the same time, the reverse locking plate 42 is reset and unlocked under the action of spring two, and the rear lower door 18 can also be opened. The double mechanical interlocking effectively avoids the risk of entering the live interval by mistake. The bevel gear one 24 and the bevel gear two 26 cooperate to realize the bevel gear reversing structure, and the triangular linkage plate one 28 simultaneously transmits power to the front lower door 16 interlocking structure and the rear lower door 18 interlocking structure, so that whether the personnel tries to enter from the front lower door 16 or the rear lower door 18, as long as the grounding is not connected, the door cannot be opened, eliminating the safety blind area.

[0082] Only when the grounding switch is completely closed, the locking of the front lower door 16 and the rear lower door 18 is released synchronously. On the contrary, when the grounding switch is opened, the front lower door 16 and the rear lower door 18 are forcibly locked. This design ensures that the operator must confirm the grounding safety before opening the cabinet door, eliminating the risk of entering the live interval by mistake. Through a set of driving mechanism, the front and rear doors are simultaneously protected in both directions, the structure is compact, and the safety reliability is high.

[0083] In addition, the locking assembly one 5 drives the gear transmission structure in the lock box 51 through the key 53, drives the adapter plate 52 to drive the adapter shaft 54 to insert into the support frame 171 hole on the shell 11, realizes the rigid locking and unlocking of the front middle door 14, and controls the sliding of the operation hole baffle and the shielding plate 157 through the pull rod 143 and the pull rod 155, respectively, to physically shield the operation hole two 142 and the operation hole one 156, prevent foreign matter from entering and misoperation.

[0084] When the grounding switch needs to be operated, slide the cover 157 upward to expose the operation hole 156, the protruding part on the cover 157 passes through the slot 172 and pushes the locking rod 62, so that the locking rod 62 is lifted with the fulcrum seat 63 as the fulcrum. At this time, the locking rod 62 forms a rigid barrier on the moving path of the vacuum contactor trolley, preventing accidental entry into the working position. At the same time, when the trolley stops at the test position, the main shaft nut carried by the trolley slides into the recessed frame 64 on the front middle partition plate 17, and is elastically pressed and positioned by the interlocking plate 68. This design forms double locking, the recessed frame 64 and the interlocking plate 68 cooperate to limit the lateral movement and accidental sliding out of the trolley, and the locking rod 62 blocks the longitudinal feeding of the trolley. The cooperation of the two ensures the high stability and safety of the trolley in the transfer and test links.

[0085] When the vacuum contactor trolley advances to the working position, the valve operating plate on the trolley extrudes the interlocking plate 717, thereby unlocking the crank arm 710, and 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 retreats, the valve part 74 is automatically closed by gravity, the interlocking plate 717 is reset under the action of the spring 716 and re-locks the crank arm 710, thereby realizing the forced locking and resetting functions of the valve.

[0086] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change and modification of the above embodiments based on the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. A switch room interlocking mechanism and a grounding switch interlocking mechanism, characterized in that: The contactor cabinet (1) includes an outer shell (11), and front middle partitions (17) are provided at both ends of the inner wall of the outer shell (11), and a pull-out partition (15) is provided below the front middle partitions (17). The first interlocking mechanism (2) is disposed inside the housing (11). The first interlocking mechanism (2) includes a driving part and a linkage part that is connected to the driving part in a transmission manner. The driving part includes a grounding switch operating shaft (21) for driving the grounding switch to open and close, and a bevel gear (24) fixed to the end of the grounding switch operating shaft (21). The linkage part includes a linkage shaft (25) arranged perpendicular to the ground knife operating shaft (21), a bevel gear (26) that meshes with bevel gear one (24) on the linkage shaft (25), and a linkage plate (28) is fixedly sleeved on the linkage shaft (25). The second interlocking mechanism (3), which is mechanically connected to the linkage plate (28) via a linkage assembly, is configured to convert the opening and closing state of the grounding switch into a mechanical lock on the front lower door (16) by rotating the linkage plate (28). The third interlocking mechanism (4) is mechanically connected to the first linkage plate (28) via the second linkage assembly and is configured to use the rotation of the first linkage plate (28) to convert the opening and closing state of the grounding switch into a mechanical lock on the rear lower door (18). Among them, the linkage plate (28) is designed with a triangular structure, which serves as a unified transmission hub to drive the second interlocking mechanism (3) and the third interlocking mechanism (4) to move synchronously. Locking component two (6) includes a locking rod (62) movably disposed on the front middle partition (17) and a baffle plate (157) slidably disposed on the pull-out partition (15). The pull-out partition (15) has an operation hole (156). The baffle plate (157) is configured to drive the locking rod (62) to displace when the operation hole (156) is moved to expose it, thereby blocking the movement of the vacuum contactor trolley. The second locking component (6) further includes a guide seat (61) and a fulcrum seat (63) fixed on the first front partition (17). One end of the locking rod (62) is limited by the fulcrum seat (63) to form a rotation fulcrum, and the other end is movably constrained in the guide seat (61). The baffle plate (157) has an upwardly extending protrusion. The first front partition plate (17) has a slot (172) for the protrusion to pass through. The linkage between the baffle plate (157) and the locking rod (62) is configured such that when the baffle plate (157) moves, the protrusion pushes against one end of the locking rod (62) by passing through the slot (172), causing the locking rod (62) to deflect and tilt with the fulcrum seat (63) as the fulcrum.

2. The switch room interlocking mechanism and the grounding switch interlocking mechanism according to claim 1, characterized in that: The first linkage plate (28) is provided with an eccentrically arranged protruding shaft (29). The first interlocking mechanism (2) also includes a first connecting rod (210) and a second connecting rod (211). One end of the first connecting rod (210) is movably sleeved on the protruding shaft (29), and the other end is movably connected to one end of the second connecting rod (211), forming a rigid transmission chain that transmits the rotational motion of the first linkage plate (28) outward.

3. The switch room interlocking mechanism and the grounding switch interlocking mechanism according to claim 2, characterized in that: It also includes a rotating part, which includes a mounting component (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 component (214) and the support frame (222) are fixed on the tray (213) provided on the side of the pull-out partition (15), and the movable shaft (215) is rotatably connected to the mounting component (214) and is away from the connecting rod two (211). One end of rod one (210) is movably connected, the connecting block (216) is fixedly set 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 set on the central shaft (219) of the support frame (222) so that the operation indicator (218) can switch the status display through the rotation of the ground knife operation shaft (21).

4. The switch room interlocking mechanism and the grounding switch interlocking mechanism according to claim 3, characterized in that: The second interlocking mechanism (3) includes a guide bracket (32), a bent plate (34), a vertical plate (223), an embedded shaft (221), and the first connecting rod assembly; the first connecting rod assembly includes a first connecting rod (210), a second connecting rod (211), a connector (212), and a movable shaft (215); one end of the first connecting rod (210) is connected to the first linkage plate (28), and the other end is connected to the second connecting rod (211), the second connecting rod (211) drives the movable shaft (215) to rotate through the connector (212); the guide bracket (32) is fixed to the side of the support frame (222), and the bent plate (34) is... The bending plate (34) is slidably mounted on the guide bracket (32). One end of the bending 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 slot (35). The vertical plate (223) is fixedly mounted on the movable shaft (215), and the embedded shaft (221) is fixed 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 slot (35), restricting the sliding of the bending plate (34) and keeping the blocking end (33) in the opening path of the front lower door (16).

5. The switch room interlocking mechanism and the grounding switch interlocking mechanism according to claim 2, characterized in that: The third interlocking mechanism (4) includes a locking rod (41), a reverse locking plate (42), and the second connecting rod assembly; the second connecting rod assembly includes a right-angle piece (47), a sixth connecting rod (46), a seventh connecting rod (48), a first bracket (49), and a fifth connecting rod (44); the locking rod (41) is installed on the inner side of the lower rear door (18), and the middle part of the seventh connecting rod (48) is rotatably connected to the first bracket (49) fixed on the outer shell (11), and one end of the seventh connecting rod is provided with a waist. The second groove (481) is movably sleeved on the protruding shaft (29) of the first linkage plate (28). The sixth connecting rod (46) slides through the right-angle piece (47) fixed on the outer shell (11). Its two ends are respectively connected to the seventh connecting rod (48) and the fifth connecting rod (44). The fifth connecting rod (44) drives the anti-locking plate (42) to move, so that the anti-locking plate (42) and the locking rod (41) cooperate to lock or disengage.

6. The switch room interlocking mechanism and the grounding switch interlocking mechanism according to claim 1, characterized in that: The second locking component (6) further includes a locking part (1) disposed on the first front partition (17). The first locking part includes a concave frame (64) fixed on the first front partition (17) and an interlocking plate (68) rotatably disposed in the concave frame (64). The second interlocking plate (68) is configured to remain in the 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 handcart, forming a double lock with the physical obstruction of the locking rod (62).

7. The switch room interlocking mechanism and the grounding switch interlocking mechanism according to claim 1, characterized in that: The front partition (17) is provided with a valve interlocking mechanism (7). The valve interlocking mechanism (7) includes a valve guide rod (72), a valve part (74) slidably disposed on the valve guide rod (72), and a linkage assembly three for driving the valve part (74) to rise and fall. The linkage assembly three includes a crank arm (710) rotatably disposed. The crank arm (710) is configured to rotate under the thrust of the vacuum contactor trolley to drive the valve part (74) to open.

8. The switch room interlocking mechanism and the grounding switch interlocking mechanism according to claim 7, characterized in that: The valve interlocking mechanism (7) further includes a self-locking component, which includes a locking plate (717) and a locking shaft (714) disposed on the crank arm (710). The locking plate (717) is configured to be deflected by a spring force and locked into the locking shaft (714) in the reset state after the vacuum contactor trolley is removed, thereby restricting the rotation of the crank arm (710).

9. The switch room interlocking mechanism and the grounding switch interlocking mechanism according to claim 1, characterized in that: The contactor cabinet (1) also includes a front middle door (14), on which a locking component (5) is provided. The locking component (5) includes a lock box (51), a gear transmission structure, and two sets of connecting plates (52) that slide relative to each other driven by the gear transmission structure. The ends of the connecting plates (52) are configured to be inserted into the sockets on the outer shell (11) to lock the front middle door (14).

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