Switch cabinet

Abstract

The present application provides a switch cabinet, comprising: a cabinet body (10), comprising a main body (11) and a test door (12), wherein a first stop portion (121) is provided on the test door (12); a switch device (20); and a first interlocking assembly, comprising an operation structure (40), a second stop portion (50), and a first lifting / lowering structure (60), wherein at least part of the operation structure (40) is arranged in a liftable and lowerable mode to drive the first lifting / lowering structure (60) to lift / lower, and the first lifting / lowering structure (60) shields or provides clearance for a grounding operation hole (24) of the switch device (20); a fitting portion (61) of the first lifting / lowering structure (60) has a fitted state and a separated state; when the test door (12) is closed, the operation structure (40) is operated to drive the first lifting / lowering structure (60) to lower until the fitting portion (61) moves from the separated state to the fitted state, and the first lifting / lowering structure (60) provides clearance for the grounding operation hole (24), so that when the switch device (20) is grounded, the test door (12) cannot be opened.

Description

switchgear

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on January 23, 2024, with application number 202410097124.X. The entire contents of this application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of ring network cabinets, for example, to a switch cabinet. Background Art

[0003] As urban industrial and residential electricity quality improves, the main form of power supply network is the ring network. This stable and reliable power supply reduces the risk of large-scale power outages and thus avoids the huge economic losses caused by unexpected power outages. Ring network switchgear is one of the key devices configured for ring network power supply, and its operational safety is particularly important.

[0004] However, the ring network switch cabinets in the related art often cause electrical misoperation accidents due to staff mistakenly opening the test door, and electric shock accidents occur during maintenance. The safety of the switch equipment is relatively low, resulting in low safety protection for maintenance personnel. Summary of the Invention

[0005] The present application provides a switch cabinet to solve the problem in the related art that electrical accidents may occur due to workers' misoperation of a test door of the switch cabinet.

[0006] The present application provides a switch cabinet, comprising a cabinet body, the cabinet body comprising a cabinet body, the cabinet body having a first chamber, a second chamber and a third chamber, the switch device being arranged in the first chamber, the cavity wall of the second chamber having a first opening; the third chamber being located below the first chamber and the second chamber and having a second opening; the cabinet body further comprises a test door, the test door being arranged at the first opening, the cabinet body having a cable test compartment, the cable test compartment being located in the second chamber and having a cable test interface, the test door being movably arranged at the cable test interface, and a first stop being arranged on the test door; the switch cabinet further comprises: a switch device, which is arranged in the cabinet body; a first interlocking assembly, comprising an operating structure, a second stop and a first lifting structure, at least a part of the operating structure being movably arranged to drive the first lifting structure to perform lifting movement, and the first lifting structure being arranged to block Block or avoid the grounding operation hole of the switch device; the second stop part is arranged on the cabinet body; the first lifting structure has a matching part, and the matching part has a matching state in which the first stop part and the second stop part are both limited and matched, and a separated state in which the first stop part and the second stop part are separated; wherein, when the test door is closed, the first lifting structure is driven to descend by operating the operating structure until the matching part moves from the separated state to the engaged state, at which time the first lifting structure avoids the grounding operation hole, so that the test door cannot be opened when the switch device is grounded; when the switch device is in the grounded position, the first lifting structure is driven to rise by operating the operating structure until the matching part moves from the engaged state to the separated state, at which time the first lifting structure blocks the grounding operation hole, so that the test door is in an openable state and the switch device cannot be grounded.

[0007] In one embodiment, the operating structure includes: an operating portion, which is rotatably arranged to drive the first lifting structure to perform lifting movement; a first body; and a knob, which is rotatably arranged on the first body to drive the operating portion to perform lifting movement.

[0008] In one embodiment, the first lifting structure includes: a second body, having a first guide hole, and a matching part is arranged on the second body; two limiting structures, arranged on the second body, and the two limiting structures are arranged at intervals along the lifting direction of the first lifting structure to form a limiting space around the second body, and the operating part is located in the limiting space; a guide rod, extending into the first guide hole and can be lifted and lowered in the first guide hole along the extension direction of the first guide hole; wherein the operating part can contact each limiting structure and drive the first lifting structure to perform lifting and lowering movements; the extension direction of the first guide hole is consistent with the lifting direction of the first lifting structure.

[0009] In one embodiment, the second stop portion includes: a first connecting plate connected to the cabinet body; a first bending plate connected to the first connecting plate, the first bending plate includes a first plate body, a second plate body and a third plate body bent in sequence, the first plate body and the third plate body are arranged opposite to each other, and the second plate body has a second recess.

[0010] In one embodiment, the second stopping portion has a through hole for the first stopping portion to extend into, and the through hole passes through at least a portion of the first connecting plate and at least a portion of the second plate body.

[0011] In one embodiment, the first stop portion has a first recess, the second stop portion has a second recess, and the first interlocking assembly further includes: a shielding structure; a first elastic structure, the first elastic structure is connected to the shielding structure, and is configured to apply an elastic force to the shielding structure to shield at least part of the first recess; wherein, when the test door is closed, the first stop portion pushes the shielding structure to move to avoid at least part of the first recess until the first recess is connected to the second recess, so that the mating portion can be inserted into the first recess and the second recess and be in a mating state.

[0012] In one embodiment, the cabinet further includes: a cable room door, which is arranged at the second opening, and the cable room door has a locking portion; wherein the switch device includes a grounding operating shaft and a crank arm, the crank arm is connected to the grounding operating shaft and rotates synchronously with the grounding operating shaft, and a convex portion is provided on the outer surface of the crank arm; the switch cabinet further includes: a second interlocking assembly, including a second lifting structure, the second lifting structure has a pressing portion, and the pressing portion is configured to press the locking portion; in the process of operating the grounding operating shaft to rotate to the opening position, the convex portion pushes the second lifting structure down to the pressing portion to press the locking portion, and at this time the cable room door is in a locked state and cannot be opened.

[0013] In one embodiment, the second body has a second guide hole extending in the height direction, and the switch cabinet also includes: a first fastener, which is passed through the second guide hole and the second lifting structure, and the first fastener can slide along the extension direction of the second guide hole to connect the first lifting structure and the second lifting structure; wherein, when the switch device is in a non-grounded position and the protrusion drives the second lifting structure to descend to the limit stop of the first fastener and the second guide hole, the first lifting structure cannot rise and the test door cannot be opened.

[0014] In one embodiment, the second lifting structure further includes: a second elastic structure, configured to apply an elastic force to the second lifting structure to move upward; the switch device further includes: a transmission shaft, located below the crank arm, the first end of the transmission shaft is configured to contact the convex portion, and when the grounding operating shaft rotates to the opening position, the convex portion contacts the transmission shaft to drive the second lifting structure to descend through the transmission shaft; wherein the second elastic structure is a spring, and the second lifting structure further includes: a fourth body, having a matching protrusion, the second end of the transmission shaft contacts the matching protrusion to drive the fourth body to descend; a bending rod, including The first rod, the second rod and the third rod are bent in sequence, the first rod and the third rod are arranged opposite to each other, and the first rod is connected to the fourth body; the guide shaft, the first end of the guide shaft is connected to the third rod, the spring is sleeved on the guide shaft and the first end of the spring is limited to the third rod; the first limit plate is arranged on the second end of the guide shaft and opposite to the spring, the second end of the guide shaft has an annular recess, and the surface of the annular recess facing the first limit plate is a pressing portion; the locking portion has a locking opening, and the locking portion is sleeved on the guide shaft through the locking opening to enter between the first limit plate and the pressing portion.

[0015] In one embodiment, a cable test device is provided in the cable test compartment, and the cable test device includes: a cable test sleeve, which is passed through the cavity wall of the first cavity; a grounding short-circuit copper busbar and a grounding copper busbar, both of which are detachably provided on the cable test sleeve; a busbar, the two ends of the busbar are respectively connected to the grounding moving contact seat of the switch device and the outlet end of the cable test sleeve; a grounding copper rod, one end of the grounding copper rod is connected to the inlet end of the cable test sleeve, and the other end of the grounding copper rod is connected to the grounding static contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 shows a front view of a switch cabinet provided by an embodiment of the application;

[0017] FIG2 shows a side view of the switch cabinet in FIG1 ;

[0018] FIG3 shows a side view of the switch cabinet in FIG2 with the test door removed;

[0019] FIG4 shows a schematic diagram of a partial three-dimensional structure of the switch cabinet in FIG1 ;

[0020] FIG5 is a schematic diagram showing the three-dimensional structure of the first interlocking assembly of the switch cabinet in FIG1 ;

[0021] FIG6 shows a front view of the first interlock assembly in FIG5 ;

[0022] FIG7 shows a side view of the first interlock assembly in FIG5 ;

[0023] FIG8 shows a front view of the first lifting structure of the first interlocking assembly in FIG5 ;

[0024] FIG9 shows a side view of the first lifting structure in FIG8 ;

[0025] FIG10 shows a front view of the second interlocking assembly of the switch cabinet in FIG1 ;

[0026] FIG11 shows a side view of the second interlock assembly in FIG10 ;

[0027] FIG12 shows a front view of the shielding structure of the first interlocking assembly in FIG5 shielding the second recess;

[0028] FIG13 shows a side view of the shielding structure in FIG12 shielding the second recess;

[0029] FIG14 shows a front view of the first interlocking assembly in FIG5 when the shielding structure avoids at least a portion of the second recess;

[0030] FIG15 shows a side view of the shielding structure in FIG14 when it avoids at least a portion of the second recess;

[0031] FIG16 shows a schematic perspective structural diagram of the second stopper in FIG14 ;

[0032] FIG17 shows a schematic diagram of the three-dimensional structure of the shielding structure in FIG14 ;

[0033] FIG18 is a schematic diagram showing the three-dimensional structure of the switch cabinet in FIG1 after the second stopper and the sealing plate are assembled;

[0034] FIG19 shows a schematic diagram of the three-dimensional structure of the test door of the switch cabinet in FIG1 ;

[0035] FIG20 shows a schematic diagram of the three-dimensional structure of the switch cabinet in FIG1 after the test door and the cover plate are assembled;

[0036] FIG21 shows a schematic diagram of the three-dimensional structure of the switch cabinet in FIG1 after the operation panel and the operation structure are assembled;

[0037] FIG22 is a schematic diagram showing a three-dimensional structure of the operating structure in FIG21;

[0038] FIG23 shows a front view of the operating structure in FIG22;

[0039] FIG24 shows a side view of the operating structure of FIG22;

[0040] FIG25 shows a schematic diagram of the three-dimensional structure of the switch cabinet in FIG1 after the first lifting structure and the second lifting structure are assembled;

[0041] FIG26 shows a schematic diagram of the three-dimensional structure of the switchgear in FIG1 after the switchgear and the second lifting structure are assembled;

[0042] FIG27 is a schematic perspective view of the switch device in FIG26 assembled with the second lifting structure from another angle;

[0043] FIG28 shows a front view of the switch device in FIG26;

[0044] FIG29 shows a side view of the switchgear of FIG28;

[0045] FIG30 shows a schematic perspective structural diagram of the cable compartment door of the switch cabinet in FIG1 ;

[0046] FIG31 shows a front view of the locking portion of the cable room door in FIG30;

[0047] FIG32 shows an assembly diagram of the first lifting structure and the second lifting structure of the switch cabinet in FIG1 ;

[0048] FIG33 shows a front view of the first lifting structure and the second lifting structure in FIG32 when the lifting structure is stopped;

[0049] FIG34 shows a schematic diagram of the three-dimensional structure of the second bent plate of the switch cabinet in FIG27 .

[0050] The above drawings include the following reference numerals:

[0051] 10. Cabinet; 11. Cabinet body; 111. First chamber; 112. Second chamber; 113. Third chamber; 12. Test door; 121. First stopper; 1211. First recess;

[0052] 20. Switch device; 21. Grounding operation shaft; 22. Crank arm; 221. Protrusion; 23. Transmission shaft; 24. Grounding operation hole;

[0053] 300. Cable test compartment; 30. Cable test device; 31. Cable test bushing; 32. Grounding shorting copper busbar; 33. Grounding copper busbar; 34. Busbar; 35. Grounding copper rod; 36. Busbar bushing; 37. Outlet bushing; 38. Grounding moving contact seat; 39. Grounding static contact;

[0054] 40. Operation structure; 41. Operation portion; 42. First body; 43. Knob; 44. Arrow mark;

[0055] 50. Second stopper; 51. Second recess; 52. First connecting plate; 53. First bending plate; 531. First plate; 532. Second plate; 533. Third plate; 54. Through hole; 55. Through hole;

[0056] 60. First lifting structure; 61. Matching portion; 62. Second body; 621. First guide hole; 622. Second guide hole; 63. Limiting structure;

[0057] 70. Shielding structure; 71. Third body; 711. Strip hole; 712. Guide recess; 72. Flanged edge;

[0058] 80. First elastic structure;

[0059] 90. Second fastener;

[0060] 100, cable compartment door; 101, locking portion; 1011, locking opening; 102, hook; 103, handle;

[0061] 110, second lifting structure; 1101, pressing portion; 1102, second elastic structure; 1103, fourth body; 11031, mating protrusion; 11032, second connecting plate; 11033, second bending plate; 11034, mounting hole; 1104, bending rod; 11041, first rod; 11042, second rod; 11043, third rod; 1105, guide shaft; 1106, first limiting plate; 1107, second limiting plate;

[0062] 122, sealing plate; 123, operation panel; 124, baffle;

[0063] 130. First fastener. DETAILED DESCRIPTION

[0064] In the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0066] In this application, unless otherwise specified, directional words such as "up" and "down" are generally used with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" are generally used with respect to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit this application.

[0067] In order to solve the problem in the related art that electrical accidents may occur due to workers' misoperation of the test door of the switch cabinet, the present application provides a switch cabinet.

[0068] As shown in Figures 1 to 34, the switchgear includes a cabinet 10. The cabinet 10 includes a cabinet body 11. The cabinet body 11 has a first chamber 111, a second chamber 112, and a third chamber 113. The switchgear 20 is disposed within the first chamber 111. The wall of the second chamber 112 has a first opening, and a test door 12 is disposed at the first opening. The third chamber 113 is located below the first and second chambers 111, and has a second opening. The cabinet 10 also includes a test door 12. The cabinet body 11 has a cable test compartment 300, which has a cable test interface. The test door 12 is movably disposed at the cable test interface and is provided with a first stop 121. The switchgear also includes a switchgear 20 and a first interlock assembly. The switchgear 20 is disposed within the first chamber 111. The first interlock assembly includes an operating structure 40, a second stopper 50, and a first lifting structure 60. At least a portion of the operating structure 40 is configured to be liftable to drive the first lifting structure 60 to move upward and downward. The first lifting structure 60 is configured to block or avoid the grounding operating hole 24 of the switch device 20. The second stopper 50 is disposed on the cabinet body 11. The first lifting structure 60 includes a mating portion 61. The mating portion 61 has an engaged state in which it engages with both the first stopper 121 and the second stopper 50, and a disengaged state in which it disengages from both the first stopper 121 and the second stopper 50. When the test door 12 is closed, the operating structure 40 is used to drive the first lifting structure 60 downward until the mating portion 61 moves from the disengaged state to the engaged state. At this point, the first lifting structure 60 avoids the grounding operating hole 24, preventing the test door 12 from being opened during a grounding operation on the switch device 20. When the switch device 20 is in the grounding position, the first lifting structure 60 is driven to rise by operating the operating structure 40 until the mating portion 61 moves from the mating state to the disengaged state. At this time, the first lifting structure 60 blocks the grounding operating hole 24, so that the test door 12 is in an openable state and the switch device 20 cannot be grounded.

[0069] By applying the technical solution of this embodiment, when the test door 12 is closed, the first lifting structure 60 is driven to descend by operating the operating structure 40 until the matching portion 61 moves from the separated state to the matched state. At this time, the first lifting structure 60 avoids the grounding operating hole 24, and the test door 12 is in the closed state. Since the matching portion 61 is limited by the first stop portion 121, the staff cannot open the test door 12, so as to ensure that the test door 12 cannot be opened when the switch device 20 is grounded, and the switch device 20 and the test door 12 are interlocked, thereby solving the problem of electrical accidents caused by staff misoperating the test door 12 of the switch cabinet in the related technology, thereby improving the safety of the switch cabinet. At the same time, when the switch device 20 is in the grounding position, the first lifting structure 60 is driven to rise by operating the operating structure 40 until the mating portion 61 moves from the mating state to the separated state. At this time, the first lifting structure 60 blocks the grounding operating hole 24, and the test door 12 is in an openable state. In this state, the staff cannot perform the grounding operation on the switch device 20, so as to realize the interlocking of the switch device 20 and the test door 12.

[0070] As shown in Figures 16 to 19, the first stopper 121 has a first recess 1211, the second stopper 50 has a second recess 51, and the first interlock assembly further includes a shielding structure 70 and a first elastic structure 80. The first elastic structure 80 is connected to the shielding structure 70 and is configured to apply an elastic force to the shielding structure 70 to shield at least a portion of the first recess 1211. When the test door 12 is closed, the first stopper 121 pushes the shielding structure 70 to move out of the way of at least a portion of the first recess 1211 until the first recess 1211 communicates with the second recess 51, allowing the mating portion 61 to penetrate the first recess 1211 and the second recess 51 and engage with each other. In this way, when the test door 12 is closed, the above-mentioned arrangement of the shielding structure 70 and the first elastic structure 80 ensures that the matching portion 61 can be inserted into the first recess 1211 and the second recess 51 (and is limitedly matched with the first stop portion 121 and the second stop portion 50), that is, the first lifting structure 60 can be lowered to avoid the grounding operation hole 24, thereby ensuring that the switching device 20 can be grounded when the test door 12 is closed.

[0071] When the first interlock assembly is in its initial state (when the test door 12 is not closed), the shielding structure 70, under the elastic force of the first elastic structure 80, shields at least a portion of the first recess 1211. At this time, the engaging portion 61 cannot engage with the first stop portion 121 and the second stop portion 50, and the first lifting structure 60 cannot descend to avoid the grounding operation hole 24. When a worker closes the test door 12, the first stop portion 121 pushes the shielding structure 70 to overcome the elastic force, allowing the shielding structure 70 to avoid at least a portion of the first recess 1211 until the first recess 1211 is connected to the second recess 51. At this time, the engaging portion 61 can be inserted into the first recess 1211 and the second recess 51, allowing the first lifting structure 60 to descend. When the staff operates the operating part 41 to drive the first lifting structure 60 to descend, the first lifting structure 60 can avoid the grounding operating hole 24. At this time, the test door 12 is in a closed state and due to the limiting cooperation between the matching part 61 and the first stop part 121, the staff cannot open the test door 12, so as to ensure that the test door 12 cannot be opened when the switch device 20 is grounded, thereby realizing the interlocking of the switch device 20 and the test door 12, thereby solving the problem of electrical accidents caused by staff misoperating the test door 12 of the switch cabinet in the related technology.

[0072] In one embodiment, the first elastic structure 80 is a spring.

[0073] In one embodiment, the first recess 1211 is a first through hole, and the size of the matching portion 61 matches the size of the first through hole.

[0074] In one embodiment, the second recess 51 is a second through hole, and the size of the matching portion 61 matches the size of the first through hole.

[0075] As shown in Figures 21 to 24, the operating structure 40 includes an operating portion 41, a first body 42, and a knob 43. The operating portion 41 is arranged to be raised and lowered to drive the first lifting structure 60 to move up and down. The knob 43 is rotatably arranged on the first body 42 to drive the operating portion 41 to move up and down.

[0076] As shown in Figures 21 to 24, the operating structure 40 further includes a transmission assembly, wherein a knob 43 is rotatably disposed on the first body 42, and the knob 43 is connected to the operating portion 41 via the transmission assembly to drive the operating portion 41 to perform a lifting motion. The transmission assembly is a rack and pinion mechanism or a worm gear mechanism.

[0077] As shown in Figures 22 and 23, an arrow mark 44 is provided on the knob 43. When the knob 43 is rotated so that the arrow mark 44 points upward, the operating part 41 moves to the highest position, so that the first lifting structure 60 rises to the highest position; when the knob 43 is rotated so that the arrow mark 44 points downward, the operating part 41 moves to the lowest position, so that the first lifting structure 60 drops to the lowest position. On the one hand, it is convenient for the staff to obtain the lifting status of the first lifting structure 60; on the other hand, when the first lifting structure 60 rises to the highest position, the grounding operation hole 24 is blocked. At this time, the test door 12 can be opened and is in the "unlocked" state, and the staff cannot perform the grounding operation on the switch device 20; when the first lifting structure 60 drops to the lowest position, the grounding operation hole 24 is avoided. At this time, the test door 12 is in the closed state and in the "locked" state, and the staff can perform the grounding operation on the switch device 20.

[0078] As shown in Figures 8 and 9, the first lifting structure 60 includes a second body 62, two limiting structures 63, and a guide rod. The second body 62 has a first guide hole 621, the matching portion 61 is arranged on the second body 62, and the two limiting structures 63 are arranged on the second body 62. The two limiting structures 63 are arranged at intervals along the lifting direction of the first lifting structure 60 to form a limiting space around the second body 62, and the operating part 41 is located in the limiting space. The guide rod extends into the first guide hole 621 and can move up and down in the first guide hole 621 along the extension direction of the first guide hole 621. Among them, the operating part 41 can contact each limiting structure 63 and drive the limiting structure 63 to rise or fall, thereby driving the first lifting structure 60 to move up and down. The extension direction of the first guide hole 621 is consistent with the lifting direction of the first lifting structure 60. In this way, the mating portion 61 is located below the two limiting structures 63 and extends along the lifting direction of the first lifting structure 60. When the operator rotates the knob 43, the operating portion 41 can push the corresponding limiting structure 63 to move, thereby achieving the lifting movement of the first lifting structure 60, reducing the difficulty of operating the first lifting structure 60. At the same time, during the lifting movement of the first lifting structure 60, the first guide hole 621 is configured to limit and guide it, ensuring that the first lifting structure 60 always moves in the vertical direction, improving the lifting stability of the first lifting structure 60.

[0079] In this embodiment, the second body 62 and the limiting structure 63 are both plate-shaped structures, and the second body 62 and the limiting structure 63 are arranged at an angle.

[0080] As shown in Figure 16, the second stopper 50 includes a first connecting plate 52 and a first bent plate 53. The first connecting plate 52 is connected to the cabinet body 11, and the first bent plate 53 is connected to the first connecting plate 52. The first bent plate 53 includes a first plate 531, a second plate 532, and a third plate 533 that are bent in sequence. The first plate 531 and the third plate 533 are disposed opposite each other, and the second plate 532 has a second recess 51. The second stopper 50 includes a through-hole 54 for the first stopper 121 to extend into. The through-hole 54 extends through at least a portion of the first connecting plate 52 and at least a portion of the second plate 532. This arrangement simplifies the structure of the second stopper 50, making it easier to manufacture and implement, and reduces the cost and difficulty of manufacturing the second stopper 50. Furthermore, the provision of the through-hole 54 ensures that the first stopper 121 can push against the shielding structure 70.

[0081] As shown in Figure 17, the shielding structure 70 includes a third body 71 and a flange 72. The third body 71 has a strip-shaped hole 711 and a guide recess 712. The third body 71 is configured to block or avoid at least a portion of the second recess 51. The second fastener 90 is inserted through the strip-shaped hole 711 and the second plate 532 to connect the third body 71 and the first bent plate 53, allowing the shielding structure 70 to be slidably mounted on the second stop 50. The first plate 531 and / or the third plate 533 can extend into the guide recess 712. The flange 72 is disposed on the third body 71 and extends into the second recess 51. The flange 72 is configured to be pushed by the first stop 121. This arrangement ensures that the shielding structure 70 can slide relative to the second stop 50 to block or avoid the first recess 1211, thereby improving the operational reliability of the shielding structure 70. At the same time, when the operator closes the test door 12, the first stopper 121 pushes the flange 72 to drive the shielding structure 70, thereby improving the reliability and stability of the first stopper 121's pushing of the shielding structure 70. In addition, the above arrangement makes the shielding structure 70 simpler, easier to manufacture and implement, and reduces the manufacturing cost and difficulty of the shielding structure 70.

[0082] In this embodiment, the second plate 532 has a through hole 55, and the second fastener 90 is passed through the strip hole 711 and the through hole 55, which can not only connect the shielding structure 70 and the second stop portion 50, but also ensure that the shielding structure 70 can slide relative to the second stop portion 50.

[0083] The third body 71 and the flange 72 are both plate-like structures and are set at an angle. There are two guide recesses 712. The third body 71 has two notches, each of which forms a corresponding guide recess 712. The first plate 531 extends into one guide recess 712, and the third plate 533 extends into the other guide recess 712 to limit the sliding direction of the shielding structure 70.

[0084] In one embodiment, the extending direction of the strip-shaped hole 711 is consistent with the sliding direction of the shielding structure 70 .

[0085] As shown in FIG20 , the first stopper 121 includes a fourth plate and a fifth plate arranged at an angle, the fourth plate being connected to the test door 12 , and the fifth plate having a first recess 1211 . The first stopper 121 is arranged on the inner side of the test door 12 .

[0086] As shown in Figures 1 and 30 , the cabinet 10 also includes a cable compartment door 100. This door 100 is located at the second opening and has a locking portion 101. This arrangement makes the internal structure of the cabinet body 11 more rational and compact, improving the internal space utilization of the cabinet body 11. Furthermore, the cable compartment door 100 protects outgoing cables and the primary components required for the measurement and protection functions of the ring main unit.

[0087] As shown in FIG. 2 , a handle 103 is provided on the cable room door 100 . When the cable room door 100 needs to be disassembled, the cable room door 100 needs to be lifted up using the handle 103 .

[0088] As shown in Figures 26 to 29, the switch device 20 includes a grounding operating shaft 21 and a crank arm 22. The crank arm 22 is connected to the grounding operating shaft 21 and rotates synchronously with the grounding operating shaft 21. A protrusion 221 is provided on the outer surface of the crank arm 22. The switch cabinet also includes a second interlocking assembly. The second interlocking assembly includes a second lifting structure 110, and the second lifting structure 110 has a pressing portion 1101, which is configured to press the locking portion 101. In the process of operating the grounding operating shaft 21 to rotate to the opening position, the protrusion 221 drives the second lifting structure 110 to descend to the pressing portion 1101 to press the locking portion 101. At this time, the cable room door 100 is in a locked state and cannot be lifted up to open. In this way, when the cable compartment door 100 is hung on the cabinet body 11 and the staff operates the grounding operating shaft 21 to rotate to the open position, the locking portion 101 is pressed by the pressing portion 1101, and the cable compartment door 100 is locked and cannot be opened, thereby achieving the interlocking of the switch device 20 and the cable compartment door 100. Only when the staff operates the grounding operating shaft 21 to rotate to the grounding closed position (the protrusion 221 is separated from the second lifting structure 110), the pressing portion 1101 is separated from the locking portion 101, and only then is the cable compartment door 100 allowed to open, thereby achieving the interlocking of the switch device 20 and the cable compartment door 100, thereby improving the safety of the staff in operating the switch cabinet.

[0089] As shown in Figures 26 to 29 and 32, the second body 62 has a second guide hole 622 extending in the height direction. The switch cabinet also includes a first fastener 130. The first fastener 130 is inserted through the second guide hole 622 and the second lifting structure 110. The first fastener 130 can slide along the extension direction of the second guide hole 622 to connect the first lifting structure 60 with the second lifting structure 110. When the switch device 20 is in the ungrounded position and the protrusion 221 drives the second lifting structure 110 down to the limit stop between the first fastener 130 and the second guide hole 622, the first lifting structure 60 cannot rise and the test door 12 cannot be opened. This arrangement achieves a sliding connection between the first lifting structure 60 and the second lifting structure 110. When the second lifting structure 110 descends to the limit stop between the first fastener 130 and the second guide hole 622, the first lifting structure 60 cannot rise. At this time, the operating structure 40 cannot be used to drive the first lifting structure 60 to rise, ensuring that the test door 12 cannot be opened.

[0090] As shown in Figures 25 and 26, the second lifting structure 110 also includes a second elastic structure 1102, which is connected to the second lifting structure 110 and is configured to apply an elastic force to the second lifting structure 110 to cause the second lifting structure 110 to move upward. When the grounding operating shaft 21 is rotated to the grounding position, the protrusion 221 separates from the second lifting structure 110, and the pressing portion 1101 separates from the locking portion 101. At this time, the cable compartment door 100 is in an openable state. Thus, when the grounding operating shaft 21 drives the crank arm 22 to rotate until the protrusion 221 separates from the second lifting structure 110, the second elastic structure 1102 applies an elastic reset force to the second lifting structure 110, causing the second lifting structure 110 to rise until the pressing portion 1101 separates from the locking portion 101. At this time, the cable compartment door 100 is in an openable state.

[0091] In this embodiment, when the switch device 20 is in the grounded position, the second elastic structure 1102 pushes the second lifting structure 110, driving the first fastener 130 upward within the second guide hole 622. This, through the operation of the operating structure 40, drives the first lifting structure 60 upward until the mating portion 61 moves from the engaged state to the disengaged state, thereby allowing the test door 12 to be opened. Thus, when the switch device 20 is in the grounded position, the second lifting structure 110 moves upward, and the first fastener 130 no longer restricts the upward movement of the first lifting structure 60. Through the operation of the operating structure 40, the first lifting structure 60 is driven upward until the mating portion 61 moves from the engaged state to the disengaged state. At this point, the interlock of the test door 12 is released and can be opened normally.

[0092] As shown in Figures 28 and 29, the switch device 20 further includes a transmission shaft 23. The transmission shaft 23 is located below the crank arm 22, and the first end of the transmission shaft 23 is configured to contact the protrusion 221. When the grounding operating shaft 21 rotates to the open position, the protrusion 221 contacts the transmission shaft 23, driving the second lifting structure 110 downward via the transmission shaft 23. Thus, during the rotation of the protrusion 221, the transmission shaft 23 can drive the second lifting structure 110 downward, thereby improving the reliability and smoothness of the movement of the second lifting structure 110.

[0093] As shown in Figures 10, 11, and 26, the second elastic structure 1102 is a spring. The second lifting structure 110 includes a fourth body 1103, a bending rod 1104, a guide shaft 1105, and a first stop plate 1106. The fourth body 1103 has a mating protrusion 11031, with the second end of the transmission shaft 23 contacting the mating protrusion 11031 to drive the fourth body 1103 downward. The bending rod 1104 includes a first rod 11041, a second rod 11042, and a third rod 11043, which are bent in sequence. The first rod 11041 and the third rod 11043 are disposed opposite each other and are connected to the fourth body 1103. The first end of the guide shaft 1105 is connected to the third rod 11043. A spring is sleeved on the guide shaft 1105, and the first end of the spring is engaged with the third rod 11043. The first limiting plate 1106 is disposed on the second end of the guide shaft 1105 and is disposed opposite to the spring. The second end of the guide shaft 1105 has an annular recess, and the surface of the annular recess facing the first limiting plate 1106 is a pressing portion 1101. The locking portion 101 has a locking opening 1011, and the locking portion 101 is sleeved on the guide shaft 1105 through the locking opening 1011 to enter between the first limiting plate 1106 and the pressing portion 1101. In this way, the above arrangement, on the one hand, makes the structure of the second lifting structure 110 simpler, easier to process and implement, and reduces the processing cost and difficulty of the second lifting structure 110. On the other hand, the spring can be extended and retracted along the extension direction of the guide shaft 1105, thereby adjusting the position of the pressing portion 1101 to achieve the pressing or releasing of the locking portion 101 by the pressing portion 1101, thereby improving the interlocking reliability of the second interlocking assembly on the cable compartment door 100.

[0094] As shown in Figures 1, 10, and 11, the second chamber 112 has a connecting hole, through which the second chamber 112 is connected to the third chamber 113. A portion of the second lifting structure 110 is located in the second chamber 112, and another portion of the second lifting structure 110 extends into the third chamber 113 via the connecting hole. The second lifting structure 110 also includes a second limiting plate 1107. The second limiting plate 1107 is connected to the cavity wall of the second chamber 112 and / or the third chamber 113, and the second end of the spring is limited to the second limiting plate 1107. In this way, the above-mentioned position setting of the second lifting structure 110 ensures that it can press the locking portion 101, so that the cable chamber door 100 is in a locked state and cannot be lifted up to open. At the same time, the above-mentioned setting can limit the second end of the spring to ensure that the spring always applies an upward elastic force to the second lifting structure 110.

[0095] In this embodiment, the second end of the spring abuts against the second limiting plate 1107 to achieve a limiting stop therebetween.

[0096] In this embodiment, the second limiting plate 1107 is fixed on the bottom wall of the second chamber 112 .

[0097] The interlocking principle between the switch device 20 and the operating structure 40 (test door 12) is as follows:

[0098] When the switch device 20 is in the grounded position, the second end of the transmission shaft 23 contacts the mating protrusion 11031, driving the fourth body 1103 to descend along the second guide hole 622 of the second body 62. In this state, the first fastener 130 installed in the second guide hole 622 moves to the lowest end of the second guide hole 622, thereby limiting the upward movement of the first lifting structure 60. At this time, it is impossible to operate the operating structure 40 to drive the first lifting structure 60 to rise. In other words, when the switch device 20 is in the ungrounded position, the operating structure 40 cannot be rotated to achieve the upward movement of the first lifting structure, thereby preventing the mating portion 61 from moving from the mated state to the disengaged state, and the test door 12 cannot be opened. The first fastener 130 is inserted into the second guide hole 622 and the second lifting structure 110 to connect the first lifting structure 60 and the second lifting structure 110.

[0099] When the switch device 20 is in the grounded position, the second lifting structure 110 moves upward, and the first fastener 130 no longer restricts the upward movement of the first lifting structure 60. In this state, the first lifting structure 60 is driven to rise by operating the operating structure 40 until the mating portion 61 moves from the mating state to the disengaged state. At this time, the interlock of the test door 12 is released and it can be opened normally.

[0100] As shown in Figures 10, 11, 26, 27, and 32 to 34, the fourth body 1103 includes a second connecting plate 11032 and a second bending plate 11033. The second connecting plate 11032 is connected to the bending rod 1104. The second bending plate 11033 is disposed on the first rod 11041. At least a portion of the second bending plate 11033 forms a mating protrusion 11031. At least a portion of the second bending plate 11033 is disposed adjacent to the first lifting structure 60 and has a mounting hole 11034. The first fastener 130 is disposed within the mounting hole 11034. This arrangement simplifies the structure of the fourth body 1103, reduces the processing cost and difficulty of the second lifting structure 110, and facilitates and simplifies the assembly and disassembly of the first and second lifting structures 60 and 110, thereby reducing the difficulty of assembly and disassembly.

[0101] The second bending plate 11033 is U-shaped and sleeved on the first rod 11041 .

[0102] In this embodiment, the first fastener 130 is disposed on the second bent plate 11033 .

[0103] In this embodiment, the first rod 11041 and the third rod 11043 are arranged parallel to each other, and the first rod 11041 and the second rod 11042 are arranged perpendicular to each other. The guide shaft 1105 is located on the side of the third rod 11043 away from the first rod 11041 and extends along the lifting direction of the second lifting structure 110. The mating protrusion 11031 is a first bent plate.

[0104] As shown in Figures 30 and 31 , the cable compartment door 100 also has a hook 102. The locking portion 101 and hook 102 are both located on the inner side of the cable compartment door 100. The cabinet body 11 has a mounting recess. The hook 102 extends into the mounting recess and engages with the mounting recess to hang the cable compartment door 100 on the cabinet body 11. This arrangement makes assembly and disassembly of the cable compartment door 100 and the cabinet body 11 easier and more convenient, reducing the difficulty of assembly and disassembly.

[0105] In one embodiment, there are multiple hooks 102 , and the multiple hooks 102 are arranged at intervals along the height direction and the width direction of the cable room door 100 .

[0106] As shown in Figures 1 to 4, a cable testing device 30 is installed within the cable testing compartment 300. The device 30 includes a cable testing bushing 31, a grounding shorting copper busbar 32, a grounding copper busbar 33, a busbar 34, and a grounding copper rod 35. The cable testing bushing 31 is installed through the wall of the first chamber 111. Both the grounding shorting copper busbar 32 and the grounding copper busbar 33 are removably mounted on the cable testing bushing 31. The ends of the busbar 34 are connected to the grounding movable contact 38 of the switchgear 20 and the outgoing terminal of the cable testing bushing 31, respectively. One end of the grounding copper rod 35 is connected to the incoming terminal of the cable testing bushing 31, and the other end of the grounding copper rod 35 is connected to the grounding static contact 39. Before testing the cable, the grounding shorting copper busbar 32 and the grounding copper busbar 33 are removed from the cable testing bushing 31 and the grounding static and moving contacts are closed. This allows voltage to be applied to the incoming terminal to test the cable. In this way, the test door 12 is configured to protect the cable test device 30 . When an insulation test is required on the cable of the cable test device 30 , the operator operates the test door 12 to open it without operating the cable room door 100 .

[0107] In this embodiment, the grounding short-circuit copper busbar 32 is installed on the three-phase incoming line end of the cable test bushing 31 to realize the short-circuiting of the three-phase incoming line end of the cable test bushing 31. It is connected to the cabinet grounding busbar through the grounding copper busbar 33, and the busbar 34 is respectively connected to the ABC three-phase grounding moving contacts of the three-position load switch device and the ABC three-phase outgoing line end of the cable test bushing 31.

[0108] When it is necessary to perform insulation testing on the cable of the cable test device 30, the load switch is turned to the grounding position, the test door 12 is opened, and the grounding short-circuit copper bus 32 and the grounding copper bus 33 on the three-phase cable test bushing 31 are removed or hung to other safe locations. At this time, the cable test bushing 31, the grounding copper rod 35, the grounding static contact 39, the grounding moving contact, the busbar 34, the outgoing bushing 37 and the outgoing cable are in a connected state, and the outgoing side cable can be tested through the cable test bushing 31.

[0109] After removing the grounding shorting copper busbar 32 and grounding copper busbar 33 from the three-phase cable test bushing 31, operate the three-position load switch device to the grounded state. At this time, a three-phase test voltage is applied to the three-phase incoming line terminals of the cable test bushing 31. The insulation test of the three-phase cable can be carried out through the conductive circuit formed by the cable test bushing 31, grounding copper rod 35, grounding contact, load switch moving contact knife, busbar 34, outlet bushing 37, cable head, and three-phase cable. This test process does not require disconnecting the cables or opening the cable room door 100, meeting the local power department's requirements for cable testing and safety protection. When cable testing is not required, the grounding short-circuit copper busbar 32 and the grounding copper busbar 33 are both in the installed and connected state, so that the three-position load switch device is operated to the grounding state. At this time, the three-phase cable forms a reliable grounding circuit with the switch cabinet through the cable head, outlet bushing 37, busbar 34, load switch moving contact knife, grounding contact, grounding copper rod 35, cable test bushing 31, grounding short-circuit copper busbar 32, grounding copper busbar 33, etc.

[0110] As shown in FIG. 4 , the cable testing device 30 further includes a busbar bushing 36 . The busbar bushing 36 is sleeved on the busbar 34 to protect the busbar 34 .

[0111] As shown in Figure 1, the switch cabinet also includes an operation panel 123, a sealing plate 122 and a baffle 124, wherein the operation panel 123 is located in the front of the second chamber 112, the sealing plate 122 is located in the front of the cable test sleeve 31, and the second stop portion 50 is arranged on the side of the sealing plate 122 facing the test door 12.

[0112] In this embodiment, the door opening operation process of the test door 12 of the switch cabinet is as follows:

[0113] When the switch device 20 is operated to the grounding position, the back of the knob 43 and the operating portion 41 are embedded between the two limiting structures 63 of the first lifting structure 60. When the knob 43 is rotated counterclockwise, the operating portion 41 and the first lifting structure 60 move upward to the position directly above the arrow mark 44 ("unlocked" is displayed on the operating panel 123). In this state, the mating portion 61 moves out of the first recess 1211 and the second recess 51, and the test door 12 can be opened normally. After the test door 12 is opened, the first stop portion 121 is pulled out of the first interlock assembly. At this time, the shielding structure 70 moves toward the first connecting plate 52 under the pulling force of the first elastic structure 80 to completely block the second recess 51 and ensure that the first lifting structure 60 cannot fall. In this state, the first lifting structure 60 blocks the grounding operation hole 24 of the switch device 20, so that the handle cannot be inserted to perform the load switch grounding operation function when the test door 12 is open.

[0114] In this embodiment, the closing operation process of the test door 12 of the switch cabinet is as follows:

[0115] When the test door 12 is closed, the first stopper 121 contacts the flange 72 of the shielding structure 70 and pushes the flange 72 to move to the second recess 51, where it leaks out and overlaps with the first recess 1211 on the first stopper 121. At this point, the first lifting structure 60 can descend normally. The operator rotates the knob 43 clockwise, causing the operating portion 41 to move downward and driving the first lifting structure 60 downward. When the arrow mark 44 on the knob 43 points directly downward ("Locked" is displayed on the operating panel 123), the mating portion 61 is fully inserted into the first recess 1211 and the second recess 51, and the grounding operating hole 24 of the switch device 20 leaks out. At this point, the test door 12 cannot be opened, and the load switch grounding operation can be performed.

[0116] In this embodiment, the cable compartment door 100 of the switch cabinet is placed in and opened as follows:

[0117] When the cable compartment door 100 is normally closed, the left and right hooks 102 are hooked into the cabinet body 11, and the locking portion 101 is inserted into the guide shaft 1105 of the second lifting structure 110. To open the door, the cable compartment door 100 must first be lifted and then moved in the door-opening direction to remove the hooks 102 from the cabinet body 11. When the switch device 20 is in the grounded open position (non-grounded closed position), the protrusion 221 of the crank arm 22 is directly below and supports the transmission shaft 23. As the transmission shaft 23 moves downward, it presses down the second lifting structure 110 and drives it to the lowest position, pressing against the locking portion 101, preventing the cable compartment door 100 from being lifted.

[0118] When the operator inserts the handle and rotates the grounding operating shaft 21 to activate the mechanism, the protrusion 221 of the crank arm 22 rotates to a horizontal position and separates from the transmission shaft 23. At this time, the cable compartment door 100 can be lifted up and pulled out horizontally. At this time, the left and right hooks 102 can be pulled out from the cabinet body 11, and the locking part 101 can be pulled out from under the pressing part 1101 through the locking opening 1011. That is, the cable compartment door 100 is allowed to open only when the load switch is turned to the grounding position.

[0119] In this embodiment, the closing operation process of the cable compartment door 100 of the switch cabinet is as follows:

[0120] First, check whether the position of the second lifting structure 110 is normal. Under normal conditions, the second lifting structure 110 is in the upper position due to the elastic force of the second elastic structure 1102. At this time, when hanging the cable room door 100, the locking opening 1011 of the locking portion 101 can be normally aligned so that it extends below the pressing portion 1101. If the second lifting structure 110 is not in the upper position, check whether the second elastic structure 1102 has failed and whether the load switch is not in the grounded position. After the cable room door 100 is hung, operate the grounding operating shaft 21 of the switch device 20 to rotate to the open position. At this time, the cable room door 100 is pressed by the pressing portion 1101 and cannot be opened.

[0121] In the above-mentioned embodiment of the present application, the switch cabinet includes a cabinet body, a switch device and a first interlocking assembly. The cabinet body includes a cabinet body and a test door. The cabinet body has a cable test compartment. The cable test compartment has a cable test interface. The test door can be movably arranged at the cable test interface. The test door is provided with a first stopper. The switch device is arranged in the cabinet body. The first interlocking assembly includes an operating structure, a second stopper and a first lifting structure. At least part of the operating structure can be raised and lowered to drive the first lifting structure to perform a lifting movement. The first lifting structure is arranged to block or avoid the grounding operating hole of the switch device. The second stopper is arranged on the cabinet body. The first lifting structure has a matching part, and the matching part has a matching state in which it is limitedly matched with both the first stopper and the second stopper, and a separation state in which it is separated from both the first stopper and the second stopper. In this way, when the test door is closed, the first lifting structure is driven downward by operating the operating structure until the mating portion moves from the separated state to the mating state. At this time, the first lifting structure avoids the grounding operation hole, the test door is in the closed state, and due to the limited engagement of the mating portion with the first stop portion, the staff cannot open the test door, thereby ensuring that the test door cannot be opened when the switch device is grounded, thereby achieving the interlocking of the switch device and the test door, thereby solving the problem of electrical accidents caused by staff misoperating the test door of the switch cabinet in the related art and improving the safety of the switch cabinet. At the same time, when the switch device is in the grounded position, the first lifting structure is driven upward by operating the operating structure until the mating portion moves from the mating state to the separated state. At this time, the first lifting structure blocks the grounding operation hole, the test door is in the openable state, and in this state, the staff cannot perform the grounding operation on the switch device, thereby achieving the interlocking of the switch device and the test door.

[0122] The embodiments described above are only part of the embodiments of this application, rather than all the embodiments.

[0123] The terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0124] The terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the application described herein can be practiced in orders other than those illustrated or described herein.

Claims

1. A switchgear cabinet, comprising a cabinet body (10), the cabinet body (10) including a cabinet main body (11), the cabinet main body (11) having a first chamber (111), a second chamber (112) and a third chamber (113), the chamber wall of the second chamber (112) having a first opening; the third chamber (113) being located below the first chamber (111) and the second chamber (112) and having a second opening; the cabinet body (10) further including a test door (12), the test door (12) being provided at the first opening, the cabinet main body (11) having a cable test compartment (300), the cable test compartment (300) being located in the second chamber (112) and having a cable test interface, the test door (12) being movably provided at the cable test interface, and a first stop portion (121) being provided on the test door (12); the switchgear cabinet further comprising: a switching device (20), provided in the first chamber (111); a first interlock assembly, including an operating structure (40), a second stop portion (50) and a first lifting structure (60), at least a part of the operating structure (40) being liftably provided to drive the first lifting structure (60) to perform a lifting movement, the first lifting structure (60) being arranged to block or avoid a grounding operation hole (24) of the switching device (20); the second stop portion (50) being provided on the cabinet main body (11); the first lifting structure (60) having a mating portion (61), the mating portion (61) having a mating state in which it is in limit fit with both the first stop portion (121) and the second stop portion (50) and a separated state in which it is separated from both the first stop portion (121) and the second stop portion (50); wherein, when performing a closing operation on the test door (12), the first lifting structure (60) is driven to descend by operating the operating structure (40) until the mating portion (61) moves from the separated state to the mating state, and the first lifting structure (60) avoids the grounding operation hole (24), so that the test door (12) cannot be opened when performing a grounding operation on the switching device (20); when the switching device (20) is in the grounded position, the first lifting structure (60) is driven to ascend by operating the operating structure (40) until the mating portion (61) moves from the mating state to the separated state, and the first lifting structure (60) blocks the grounding operation hole (24), so that the test door (12) is in an openable state and a grounding operation cannot be performed on the switching device (20).

2. The switchgear according to claim 1, wherein The operating structure (40) includes: an operating portion (41), the operating portion (41) being liftably provided to drive the first lifting structure (60) to perform a lifting movement; a first body (42); a knob (43), the knob (43) being rotatably provided on the first body (42) to drive the operating portion (41) to perform a lifting movement.

3. The switchgear according to claim 2, wherein, The first lifting structure (60) includes: A second body (62) having a first guiding hole (621), and the engaging portion (61) is disposed on the second body (62); Two limiting structures (63) are disposed on the second body (62), and the two limiting structures (63) are spaced apart along the lifting direction of the first lifting structure (60) to form a limiting space around the second body (62), and the operating portion (41) is located within the limiting space; A guiding rod extends into the first guiding hole (621) and can move up and down within the first guiding hole (621) along the extending direction of the first guiding hole (621); Wherein, the operating portion (41) can contact each limiting structure (63) and drive the first lifting structure (60) to perform lifting motion; the extending direction of the first guiding hole (621) is consistent with the lifting direction of the first lifting structure (60).

4. The switchgear according to claim 1, wherein, The second stopping portion (50) includes: A first connecting plate (52) connected to the cabinet body (11); A first bending plate (53) connected to the first connecting plate (52), the first bending plate (53) includes a first plate body (531), a second plate body (532) and a third plate body (533) that are bent in sequence, the first plate body (531) and the third plate body (533) are oppositely disposed, and the second plate body (532) has a second recess (51).

5. The switchgear according to claim 4, wherein, The second stopping portion (50) has a through hole (54) for the first stopping portion (121) to extend into, and the through hole (54) penetrates at least part of the first connecting plate (52) and at least part of the second plate body (532).

6. The switchgear according to claim 4, wherein, The first stopping portion (121) has a first recess (1211), the second stopping portion (50) has a second recess (51), and the first interlocking assembly further includes: A shielding structure (70); A first elastic structure (80), the first elastic structure (80) is connected to the shielding structure (70) and is configured to apply an elastic force to the shielding structure (70) to shield at least part of the first recess (1211); Wherein, when the test door (12) is closed, the first stopping portion (121) pushes the shielding structure (70) to move to avoid at least part of the first recess (1211) until the first recess (1211) communicates with the second recess (51), so that the engaging portion (61) can be inserted into the first recess (1211) and the second recess (51) and be in the engaged state.

7. The switchgear according to claim 3, wherein, The cabinet (10) further includes: A cable chamber door (100) disposed at the second opening, and the cable chamber door (100) has a locking portion (101); Wherein, the switching device (20) includes a grounding operating shaft (21) and a crank arm (22), the crank arm (22) is connected to the grounding operating shaft (21) and rotates synchronously with the grounding operating shaft (21), and a convex portion (221) is disposed on the outer surface of the crank arm (22); the switch cabinet further includes: The second interlock assembly includes a second lifting structure (110), and the second lifting structure (110) has a pressing portion (1101), and the pressing portion (1101) is arranged to press the locking portion (101); During the process of operating the grounding operating shaft (21) to rotate to the opening position, the convex portion (221) pushes the second lifting structure (110) to descend until the pressing portion (1101) presses the locking portion (101). At this time, the cable chamber door (100) is in a locked state and cannot be opened.

8. The switchgear according to claim 7, wherein, The second body (62) has a second guiding hole (622) extending in the height direction, and the switch cabinet further includes: A first fastener (130) is inserted through the second guiding hole (622) and the second lifting structure (110), and the first fastener (130) can slide along the extending direction of the second guiding hole (622) to connect the first lifting structure (60) and the second lifting structure (110); Wherein, when the switching device (20) is in the grounding opening position and the convex portion (221) drives the second lifting structure (110) to descend until the first fastener (130) is limited and stopped by the second guiding hole (622), the first lifting structure (60) cannot rise and the test door (12) cannot be opened.

9. The switchgear according to claim 7, wherein, The second lifting structure (110) further includes: A second elastic structure (1102) is arranged to apply an elastic force for upward movement to the second lifting structure (110); The switching device (20) further includes: A transmission shaft (23) is located below the crank arm (22), and the first end of the transmission shaft (23) is arranged to contact the convex portion (221). During the process of the grounding operating shaft (21) rotating to the opening position, the convex portion (221) contacts the transmission shaft (23) to drive the second lifting structure (110) to descend through the transmission shaft (23); Wherein, the second elastic structure (1102) is a spring, and the second lifting structure (110) further includes: A fourth body (1103) has a mating protrusion (11031), and the second end of the transmission shaft (23) contacts the mating protrusion (11031) to drive the fourth body (1103) to descend; A bent rod (1104) includes a first rod body (11041), a second rod body (11042) and a third rod body (11043) that are bent in sequence. The first rod body (11041) and the third rod body (11043) are arranged opposite to each other, and the first rod body (11041) is connected to the fourth body (1103); A guiding shaft (1105), the first end of the guiding shaft (1105) is connected to the third rod body (11043), and the spring is sleeved on the guiding shaft (1105) and the first end of the spring is limited and stopped by the third rod body (11043); The first limiting plate (1106) is arranged at the second end of the guiding shaft (1105) and is arranged opposite to the spring. The second end of the guiding shaft (1105) has an annular recess, and the surface of the annular recess facing the first limiting plate (1106) is the pressing portion (1101); the locking portion (101) has a locking opening (1011), and the locking portion (101) is sleeved on the guiding shaft (1105) through the locking opening (1011) to enter between the first limiting plate (1106) and the pressing portion (1101).

10. The switchgear according to claim 1, wherein, A cable test device (30) is arranged in the cable test compartment (300), and the cable test device (30) includes: A cable test bushing (31) is inserted through the chamber wall of the first chamber (111); A grounding short-circuit copper bar (32) and a grounding copper bar (33) are both detachably arranged on the cable test bushing (31); A bus bar (34), and both ends of the bus bar (34) are respectively connected to the grounding moving contact socket (38) of the switching device (20) and the outlet end of the cable test bushing (31); A grounding copper rod (35), one end of the grounding copper rod (35) is connected to the inlet end of the cable test bushing (31), and the other end of the grounding copper rod (35) is connected to a grounding static contact (39).

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