Multi-modular switch cabinet

Abstract

The invention provides a multi-modular switch cabinet which comprises a switch cabinet body and a handcart, the handcart is used for being connected with a bus contact in the switch cabinet body, the switch cabinet body is provided with an upper valve and a lower valve which are used for shielding the bus contact when the handcart exits, and the multi-modular switch cabinet further comprises a valve opening and closing assembly. The valve opening and closing assembly comprises a first rotating arm and a second rotating arm which are rotatably arranged on the switch cabinet body, the first rotating arm and the second rotating arm drive the upper valve and the lower valve to be opened and closed, and the bus contact can be shielded when the upper valve and the lower valve are in the closed position. First limiting parts are arranged on the first rotating arm and the second rotating arm; and the self-locking module is connected with the switch cabinet body, the self-locking module comprises a second limiting part, and the second limiting part is used for being matched with the first limiting part to lock the first rotating arm and the second rotating arm at the closing position. By means of the technical scheme, the technical problem that mistaken touch is likely to happen in the related technology is solved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of switch cabinets, and in particular, to a multi-modular switch cabinet. Background Art

[0002] In the power distribution sector, modular switchgear is widely used in various industrial sites, commercial buildings, and power substations due to its modular structure, easy installation and maintenance, high space utilization, and strong operational reliability. Its core function is to distribute, control, and protect electrical energy. The trolley, a key movable component within the switchgear, integrates electrical components such as circuit breakers and transformers, and switches between "working position," "test position," and "removed position" through push-pull operations. When the trolley needs to be repaired or replaced, it must be completely removed from the cabinet. At this point, the primary static contacts within the cabinet are automatically shielded by a metal flap to prevent accidental contact with live parts.

[0003] In the prior art, the valve is opened by pushing an exposed push rod when the trolley enters the trolley compartment. After the trolley is completely removed from the trolley compartment, the push rod is completely exposed inside the trolley compartment. If maintenance personnel accidentally touch the exposed push rod, leaving the valve in the open state, it can cause serious safety accidents such as electric shock and arc burns, posing a great threat to personnel safety and stable equipment operation. Although some switch cabinets have a locking mechanism for the valve, in order to facilitate the automatic opening of the valve after the trolley enters the trolley compartment, the locking mechanism is also exposed in the trolley compartment. If the locking mechanism is accidentally touched, it will automatically unlock, and it cannot achieve complete and mandatory locking. Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the present invention provides a multi-modular switch cabinet, which solves the technical problem in the related art that the valve cannot be completely and forcibly locked after the trolley leaves the trolley room, posing a risk of accidental touch by the staff.

[0005] According to one aspect, at least one embodiment of the present invention provides a multi-modular switchgear, comprising a switchgear body and a trolley, wherein the trolley is movably disposed on the switchgear body for connecting to busbar contacts within the switchgear body, the switchgear body being provided with an upper shutter and a lower shutter for shielding the busbar contacts when the trolley is withdrawn, and further comprising: A valve opening and closing assembly, the valve opening and closing assembly comprising a first rotating arm and a second rotating arm rotatably disposed on the switch cabinet body, the first rotating arm and the second rotating arm respectively connected to the upper valve and the lower valve and driving them to open and close, the upper valve and the lower valve being able to shield the busbar contact when in a closed position, and a first limiting portion being provided on each of the first rotating arm and the second rotating arm; A self-locking module is connected to the switch cabinet body. The self-locking module includes a second limiting portion. The second limiting portion is used to cooperate with the first limiting portion to lock the first rotating arm and the second rotating arm in a closed position.

[0006] For example, in a multi-modular switch cabinet provided by at least one embodiment of the present invention, the self-locking module further includes a trigger component, and when the trolley enters, the trigger component can release the engagement between the second limiting portion and the first limiting portion under the push of the trolley.

[0007] For example, in a multi-modular switchgear provided by at least one embodiment of the present invention, the self-locking module further includes a sliding locking assembly, the sliding locking assembly including a sliding block movably disposed on the switchgear body, and the second limit portion is disposed on the sliding block; The sliding block is located on one side of the first rotating arm and the second rotating arm toward the moving path of the trolley. When the trolley withdraws, the sliding block can move under the drive of the trolley and drive the first rotating arm and the second rotating arm to the locking position.

[0008] For example, in a multi-modular switchgear provided by at least one embodiment of the present invention, the self-locking module includes two second limit portions and a connecting rod connecting the two second limit portions, the connecting rod is located on a side of the sliding block away from the first rotating arm and the second rotating arm, and the connecting rod is provided with a pushing block; The trigger assembly includes a trigger rod movably connected to the switch cabinet body and a trigger member located at an end of the trigger rod away from the pushing block. When the trolley enters, the trigger member can move toward the pushing block under the push of the trolley, and push the pushing block through the trigger rod, so that the connecting rod drives the second limiting portion to engage with the first limiting portion.

[0009] For example, in a multi-modular switch cabinet provided by at least one embodiment of the present invention, the self-locking module also includes a first reset elastic member, which is sleeved on the outer periphery of the second limiting portion, and its two ends act on the connecting rod and the sliding block respectively, and the first reset elastic member is used to elastically pull the connecting rod so that the second limiting portion is engaged with the first limiting portion.

[0010] For example, in a multi-modular switch cabinet provided by at least one embodiment of the present invention, a closing elastic member is provided between the first rotating arm and the second rotating arm, for driving the first rotating arm and the second rotating arm to rotate to a closed position.

[0011] For example, in a multi-modular switch cabinet provided by at least one embodiment of the present invention, the sliding block further has two switch drive slots, and the first rotating arm and the second rotating arm are both provided with push rods, and the two push rods are respectively inserted into the two switch drive slots; The switch driving groove includes a horizontal section parallel to the moving path of the trolley and a pushing section with an angle to the moving path of the trolley. The pushing section is located on the side of the horizontal section close to the upper valve and the lower valve. The pushing sections of the two switch driving grooves can respectively push the first rotating arm and the second rotating arm to rotate to the open position when the sliding block moves toward the side where the upper valve is located.

[0012] For example, in a multi-modular switch cabinet provided by at least one embodiment of the present invention, the trigger assembly also includes a guide rod connected to the sliding block, and a limit plate is provided at one end of the guide rod away from the sliding block. When the trolley enters, the limit plate can move toward the side where the upper valve is located under the push of the trolley, and push the sliding block to move toward the side where the upper valve is located through the guide rod.

[0013] For example, in a multi-modular switchgear provided by at least one embodiment of the present invention, the trigger assembly further comprises a protective cover located on a side of the sliding block away from the upper valve, the protective cover being fixedly connected to the switchgear body, the trigger member and the limit plate being both located within the protective cover, and the trigger member being located on a side of the limit plate away from the sliding block; The guide rod and the trigger rod penetrate into the protective cover and are connected with the limiting plate and the trigger member respectively.

[0014] For example, in a multi-modular switch cabinet provided by at least one embodiment of the present invention, the trigger assembly also includes a limit assembly located in the protective cover, and the limit assembly is used to cooperate with the limit plate to limit the first rotating arm and the second rotating arm to the open position.

[0015] The beneficial effects of the embodiments of the present invention are: In the multi-modular switchgear of the present invention, after the valve opening and closing assembly drives the upper and lower valves to close, the second stopper of the self-locking module cooperates with the first stopper to lock the first and second rotating arms in the closed position. This prevents manual opening of the valves, thus preventing accidental opening and improving equipment safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments of the present invention. Obviously, the drawings described below are merely exemplary embodiments of the present invention. Those skilled in the art can, without inventive effort, derive other drawings based on the contents of the exemplary embodiments of the present invention and these drawings.

[0017] Figure 1 This is a schematic diagram of the internal structure of a multi-modular switchgear in one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure enlarged in the middle; Figure 3 for Figure 1 A schematic structural diagram of the valve opening and closing assembly in the embodiment; Figure 4 for Figure 2 A schematic structural diagram of a valve opening and closing assembly equipped with a self-locking module in an embodiment; Figure 5 for Figure 1 A schematic diagram of the partial structure of the self-locking module in the embodiment; Figure 6 for Figure 2 A schematic diagram of a partial structure of a self-locking module installed in a valve opening and closing assembly in an embodiment; Figure 7 for Figure 1 A schematic diagram of the partial structure of the trigger component in the embodiment; Figure 8 for Figure 1 A schematic structural diagram of the self-locking module in the embodiment; Figure 9 for Figure 8 The enlarged structural diagram at B in the middle; Figure 10 for Figure 1 A schematic structural diagram of another angle of the self-locking module installed in the valve opening and closing assembly of the embodiment; Figure 11 for Figure 1 Schematic diagram of the structure of the valve opening and closing assembly opening the upper valve and the lower valve in the embodiment.

[0018] In the figure: 100, switch cabinet body; 101, partition; 102, upper valve; 103, lower valve; 110, instrument room; 120, trolley room; 130, cable room; 131, outgoing contact; 140, upper chamber; 141, busbar contact; 200, valve opening and closing assembly; 201, first limiter; 210, first rotating arm; 211, push rod; 220, second rotating arm; 300, self-locking module; 311, protective cover; 312, second limiter; 313, trigger; 320, sliding locking assembly; 32 1. Sliding block; 322. Switch driving slot; 3221. Pushing section; 3222. Horizontal section; 323. Guide rod; 324. Third resetting elastic member; 325. Limiting plate; 326. Protrusion; 330. Trigger assembly; 332. Connecting rod; 333. Trigger rod; 334. First resetting elastic member; 335. Pushing block; 3351. Pushing surface; 336. Second resetting elastic member; 340. Limiting assembly; 341. Limiting block; 342. Fourth elastic resetting member; 3411. Limiting surface; 3412. Guide surface. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention.

[0020] To simplify the drawings, only portions relevant to the invention are schematically depicted in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one component with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0021] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0022] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0023] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0024] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0025] refer to Figure 1 In one embodiment of the present application, a multi-modular switchgear cabinet includes a switchgear cabinet body 100, which includes a plurality of partitions 101. The partitions 101 can separate the switchgear cabinet body 100 into an instrument room 110, a trolley room 120, a cable room 130, and an upper chamber 140. A busbar contact 141 is provided in the upper chamber 140, and an outgoing line contact 131 is provided in the cable chamber 130. A trolley is movably provided in the trolley room 120. When the trolley enters, it can move toward the busbar contact 141 provided in the upper chamber 140 and connect with the busbar contact 141. When the trolley exits, it moves away from the busbar contact 141 and disconnects from the busbar contact 141. The movement of the trolley can switch the connection state of the switchgear cabinet. After the trolley is withdrawn, the busbar contact 141 is exposed. To avoid accidental contact with the busbar contact 141, a valve is provided in the switch cabinet body 100. The valve can shield the busbar contact 141 after the trolley is withdrawn. Figure 1 In the embodiment shown, the partition 101 between the upper chambers 140 is slidably provided with an upper valve 102, and the partition 101 between the trolley chamber 120 and the cable chamber 130 is slidably provided with a lower valve 103. The upper valve 102 and the lower valve 103 respectively shield the busbar contact 141 and the outgoing line contact 131.

[0026] In this embodiment, Figure 2 and Figure 3As shown, the multi-modular switchgear also includes a valve opening and closing assembly 200 and a self-locking module 300. The valve opening and closing assembly 200 includes a first rotating arm 210 and a second rotating arm 220 rotatably mounted on the switchgear body 100. The first rotating arm 210 and the second rotating arm 220 are respectively connected to the upper valve 102 and the lower valve 103. The first rotating arm 210 and the second rotating arm 220 rotate to open and close the upper valve 102 and the lower valve 103. When the upper valve 102 and the lower valve 103 are in the closed position, they can shield the static contacts. When the upper valve 102 and the lower valve 103 are in the open position, the static contacts are exposed, and a trolley can be connected to the static contacts. There are two valve opening and closing assemblies 200 and two self-locking modules 300, each corresponding to the two vertically extending sides of the upper valve 102 and the lower valve 103. The two valve opening and closing assemblies 200 operate synchronously, driving both sides of the upper and lower valves 102, 103 to move simultaneously, thereby ensuring balanced movement of the upper and lower valves 102, 103. The two valve opening and closing assemblies 200 have the same structure, and one of them will be used as an example below. The same applies to the self-locking module 300, and will not be further described here.

[0027] like Figure 3 and Figure 4 As shown, the valve opening and closing assembly 200 further includes a first stopper 201 on each of the first rotating arm 210 and the second rotating arm 220. The self-locking module 300 is connected to the switch cabinet body 100 and includes a second stopper 312. When the first rotating arm 210 and the second rotating arm 220 rotate to the closed position, the second stopper 312 can engage with the first stopper 201, thereby locking the first rotating arm 210 and the second rotating arm 220 in the closed position.

[0028] In this embodiment, the self-locking module 300 engages the first stopper 201 via the second stopper 312, locking the first and second pivot arms 210, 220 in the closed position. Because the first and second pivot arms 210, 220 are mechanically locked, the upper and lower doors 102, 103 always shield the static contacts, preventing accidental contacting by personnel and improving the safety of the multi-modular switchgear.

[0029] In some embodiments, as Figure 4As shown, the self-locking module 300 also includes a sliding locking assembly 320. The sliding locking assembly 320 includes a sliding block 321 movably mounted on the switch cabinet body 100. The sliding block 321 is located on the side of the first and second rotating arms 210, 220 that faces the trolley's travel path. A second stopper 312 is mounted on the sliding block 321. When the trolley is withdrawn, the trolley can drive the sliding block 321 away from the valves. Simultaneously, the first and second rotating arms 210, 220 drive the upper and lower valves 102, 103 to the closed position. When the first and second rotating arms 210, 220 rotate into position, the sliding block 321 moves to the position where the second stopper 312 corresponds to the first stopper 201. At this point, the second stopper 312 engages with the first stopper 201, locking the first and second rotating arms 210, 220 in the closed position. In other embodiments, the second limiting portion 312 may also be set in other ways. For example, the self-locking module 300 may also be provided with a second limiting portion 312 with a fixed position. When the first rotating arm 210 and the second rotating arm 220 are rotated to the closed position, the second limiting portion 312 locks the two. This is not limited here.

[0030] In this embodiment, the sliding block 321 moves under the drive of the trolley to complete the locking of the first rotating arm 210 and the second rotating arm 220, so the locking process does not require additional operation, reducing the risk of personnel missing an operation and causing the upper valve 102 and the lower valve 103 to not close, further improving the safety of the equipment.

[0031] In some embodiments, the self-locking module 300 further includes a trigger assembly 330, which is used to release the engagement between the second limiting portion 312 and the first limiting portion 201. Specifically, when a trolley enters, the trolley can push the trigger assembly 330, which can cause the second limiting portion 312 to disengage from the first limiting portion 201, thereby allowing the first rotating arm 210 and the second rotating arm 220 to rotate to the open position. This also causes the upper and lower valves 102 and 103 to disengage from blocking the static contact, allowing components on the trolley to connect with the static contact.

[0032] In this embodiment, the trigger assembly 330 is driven by the trolley to unlock the first rotating arm 210 and the second rotating arm 220, which can avoid the occurrence of mislocking on the one hand and prevent equipment damage due to missed unlocking when the trolley enters on the other hand.

[0033] Optional, such as Figure 5 As shown, the self-locking module 300 includes two second limiting portions 312 and a connecting rod 332 connecting the two second limiting portions 312. Figure 4The connecting rod 332 can be located on the side of the sliding block 321 away from the first rotating arm 210 and the second rotating arm 220. The movement of the connecting rod 332 in the direction away from the sliding block 321 can drive the two second limiting parts 312 to move in the direction away from the first rotating arm 210 and the second rotating arm 220, thereby separating the second limiting parts 312 from the first limiting parts 201, thereby unlocking the first rotating arm 210 and the second rotating arm 220, and then the two can rotate to the open position.

[0034] Furthermore, the trigger assembly 330 includes a trigger rod 333 movably connected to the switch cabinet body 100 and a trigger member 313 located at one end of the trigger rod 333 away from the push block 335. The connecting rod 332 is provided with a push block 335, and the push block 335 is located on the moving path of the trigger rod 333. When the trolley enters, the trolley can contact the trigger member 313 and push the trigger member 313 to move in the direction of the push block 335, thereby causing the trigger rod 333 to penetrate between the push block 335 and the sliding block 321. Figure 6 As shown, the trigger rod 333 can push the pushing block 335 in a direction away from the first rotating arm 210 and the second rotating arm 220, and then can move toward the pushing block 335 under the push of the trolley, and push the pushing block 335 through the trigger rod 333 to separate the second limiting portion 312 from the first limiting portion 201, thereby releasing the engagement between the two.

[0035] Optional, such as Figure 7 As shown, the pushing block 335 may be provided with a pushing surface 3351. The distance between the pushing surface 3351 and the connecting rod 332 gradually decreases as it approaches the trigger rod 333. Therefore, as the trigger rod 333 moves along the pushing surface 3351, the pushing block 335 can convert this movement into movement of the connecting rod 332 away from the first rotating arm 210 and the second rotating arm 220. The pushing surface 3351 can act as a guide, reducing resistance to the movement of the trigger rod 333.

[0036] Optionally, the trigger rod 333 may be inserted into the sliding block 321, and the sliding block 321 may limit the movement direction of the trigger rod 333. The connecting rod 332 is located at one end of the sliding block 321 close to the valve. Figure 5 As shown, the sliding block 321 has a plate-shaped protrusion on one side close to the first rotating arm 210 and the second rotating arm 220 , and the second limiting portion 312 can be installed on the protrusion. The trigger rod 333 can be inserted between the protrusion and the connecting rod 332.

[0037] In some embodiments, as Figure 7As shown, the self-locking module 300 further includes a first resetting elastic member 334. Two first resetting elastic members 334 are respectively sleeved around the outer peripheries of the two second position-limiting portions 312, and the ends of the first resetting elastic members 334 are respectively connected to the connecting rod 332 and the sliding block 321. The first resetting elastic member 334 is used to elastically pull the connecting rod 332. When the sliding block 321, the first rotating arm 210, and the second rotating arm 220 are moved into place, the first resetting elastic member 334 pulls the connecting rod 332 to engage the second position-limiting portion 312 with the first position-limiting portion 201.

[0038] In this embodiment, the self-locking module 300 is provided with a first reset elastic member 334, which is used to drive the second limiting portion 312 to engage with the first limiting portion 201 through the connecting rod 332, thereby improving the reliability of the position locking of the first rotating arm 210 and the second rotating arm 220, and preventing the second limiting portion 312 from being separated from the first limiting portion 201 due to an accident.

[0039] In some embodiments, a closing elastic member is provided between the first rotating arm 210 and the second rotating arm 220 for driving the first rotating arm 210 and the second rotating arm 220 to rotate to the closed position. Figure 3 In the illustrated embodiment, the first and second pivot arms 210, 220 are in the closed position. When the first and second pivot arms 210, 220 are unconstrained, the closing elastic member can maintain them in the closed position, further preventing electric shock accidents caused by the exposed static contacts. The closing elastic member is preferably a torsion spring, but users may also use a spring as the closing elastic member, without limitation.

[0040] When the first rotating arm 210 and the second rotating arm 220 rotate to the open position, an external force is required. Figure 4 and Figure 8 As shown, the sliding block 321 further has two switch drive slots 322. Both the first pivot arm 210 and the second pivot arm 220 are equipped with push rods 211, which respectively penetrate into the two switch drive slots 322. When a trolley enters, it pushes the sliding block 321 toward the valve. The sliding block 321 drives the first and second pivot arms 210, 220 to the open position through the two switch drive slots 322. Of course, in other embodiments, the first and second pivot arms 210, 220 may rotate driven by other components, such as a stepper motor, but this is not limited here.

[0041] Optional, such as Figure 4 、 Figure 8 and Figure 11 As shown, the first rotating arm 210 and the second rotating arm 220 are connected to the switch cabinet body 100 through the same hinge shaft. Figure 4The positions shown are close to each other and can be rotated to the open position. The open position is as shown in FIG. Figure 11 As shown. The switch driving slot 322 includes a horizontal section 3222 parallel to the moving path of the trolley and a pushing section 3221 with an angle to the moving path of the trolley. The pushing section 3221 is located on the side of the horizontal section 3222 close to the upper valve 102 and the lower valve 103. The pushing sections 3221 of the two switch driving slots 322 can respectively push the first rotating arm 210 and the second rotating arm 220 to rotate to the open position when the sliding block 321 moves toward the side where the upper valve 102 is located. Figure 8 In the illustrated embodiment, the two switch actuation slots 322 may be arranged in a figure-eight configuration, with the distance between the two push segments 3221 gradually decreasing as they move away from the valve. As the sliding block 321 moves toward the valve, the two push segments 3221 push the first and second pivot arms 210, 220 toward each other, ultimately reaching the open position. In other embodiments, the first and second pivot arms 210, 220 may be connected to different hinge axes, and the corresponding switch actuation slots 322 may be arranged in other configurations, which are not limited here.

[0042] In this embodiment, the first rotating arm 210 and the second rotating arm 220 are rotated to the open position under the drive of the sliding block 321, that is, the upper valve 102 and the lower valve 103 will be opened under the drive of the trolley, avoiding collision with the upper valve 102 or the lower valve 103 when the trolley enters, further reducing the risk of missed operation.

[0043] In some embodiments, as Figure 5 and Figure 8 As shown, the trigger assembly 330 also includes a guide rod 323 connected to the sliding block 321. A stop plate 325 is provided at the end of the guide rod 323 away from the sliding block 321. The guide rod 323 is movably connected to the switch door body. When a trolley enters, the stop plate 325 can be pushed by the trolley to move toward the upper valve 102. The guide rod 323 then pushes the sliding block 321 toward the upper valve 102. As described above, the movement of the sliding block 321 toward the valves can cause the upper and lower valves 102, 103, to open. Of course, in other embodiments, the trolley can also directly drive the sliding block 321, which is not limited here.

[0044] In some embodiments, as Figure 8 and Figure 10As shown, the trigger assembly 330 also includes a protective cover 311 located on the side of the sliding block 321 away from the upper valve 102. The protective cover 311 is fixedly connected to the switch cabinet body 100. The trigger member 313 and the limit plate 325 are both located within the protective cover 311. The guide rod 323 and the trigger rod 333 penetrate into the protective cover 311 and are connected to the limit plate 325 and the trigger rod 333 respectively. The protective cover 311 is open on the side close to the trolley's moving path and on the side away from the sliding block 321. Therefore, during the movement of the trolley, it can contact the trigger member 313 and the limit plate 325, and then the trigger member 313 contacts the second limit portion 312 and the first limit portion 201 to lock, and the limit plate 325 drives the sliding block 321 to move toward the valve.

[0045] Optionally, the trigger member 313 is located on the side of the limit plate 325 away from the sliding block 321. During the entry of the trolley, it first contacts the trigger member 313, contacting the lock of the first rotating arm 210 and the second rotating arm 220, and then contacts the limit plate 325, driving the first rotating arm 210 and the second rotating arm 220 to rotate to the open position through the sliding block 321, thereby preventing the first rotating arm 210 and the second rotating arm 220 from being unable to rotate due to position locking, causing damage to the equipment.

[0046] Furthermore, the trigger member 313 also includes a second return elastic member 336, which is sleeved around the outer periphery of the trigger rod 333. The two ends of the second return elastic member 336 respectively abut against the trigger member 313 and the inner wall of the protective cover 311. When the trolley is withdrawn, the elastic force of the second return elastic member 336 can push the trigger member 313 away from the valve, thereby causing the trigger rod 333 to move away from between the push block 335 and the sliding block 321. The connecting rod 332, pulled by the first return elastic member 334, moves toward the first rotating arm 210 and the second rotating arm 220. When the first rotating arm 210 and the second rotating arm 220 rotate to the closed position, the second limit portion 312 can penetrate into the first limit portion 201, locking the first rotating arm 210 and the second rotating arm 220 in the closed position.

[0047] Furthermore, the trigger member 313 includes a third resilient member 324, which is sleeved around the outer periphery of the guide rod 323. The ends of the second resilient member 336 respectively abut against the trigger member 313 and the inner wall of the protective cover 311. When the trolley is withdrawn, the elastic force of the third resilient member 324 pushes the limiter away from the valve, thereby causing the guide rod 323 to drive the sliding block 321 away from the valve. As the sliding block 321 moves, the push rod 211 of the two rotating arms can move along the switch drive slot 322, thereby causing the first rotating arm 210 and the second rotating arm 220 to rotate away from each other. When the push rod 211 moves to the end of the switch drive slot 322 near the valve, the first rotating arm 210 and the second rotating arm 220 rotate to the closed position.

[0048] In this embodiment, the trigger assembly 330 is provided with a protective cover 311, which can protect the trigger member 313 and the limit plate 325. In addition, the trigger assembly 330 also includes a second reset elastic member 336 and a third reset elastic member 324, which can respectively push the trigger rod 333 and the sliding block 321 to move away from the valve, so that the first rotating arm 210 and the second rotating arm 220 can automatically rotate to the closed position and automatically lock the two, further improving the safety of the equipment.

[0049] In some embodiments, as Figure 8 and Figure 9 As shown, the trigger assembly 330 further includes a limiting assembly 340 located within the protective cover 311. The limiting assembly 340 is configured to cooperate with the limiting plate 325 to limit the first rotating arm 210 and the second rotating arm 220 to the open position. Specifically, sliding grooves are provided on both sides of the protective cover 311. The limiting assembly 340 includes a limiting block 341 and a fourth elastic return member 342. The sliding groove has an opening facing the guide rod 323. The limiting block 341 is disposed in the sliding groove. The fourth elastic return member 342 is located between the bottom of the sliding groove and the limiting block 341. The limiting block 341 is located on the side of the limiting plate 325 near the sliding block 321. The fourth elastic reset member 342 can push the limit block 341 to between the limit plate 325 and the sliding block 321. When the trolley enters and pushes the limit plate 325 to move toward the sliding block 321, the limit block 341 can limit the moving stroke of the limit plate 325, preventing the limit plate 325 from moving too much, causing squeezing and damage between the switch drive slot 322 and the guide rod 323.

[0050] Furthermore, the portion of the stopper 341 that penetrates the sliding groove has a guide surface 3412. This guide surface 3412 is parallel to the inner wall of the sliding groove and serves as a guide during the movement of the stopper 341. The side of the stopper 341 that faces the stopper plate 325 has a stopper surface 3411. The stopper plate 325 is also provided with a protrusion 326. The stopper surface 3411 cooperates with the protrusion 326 to squeeze the stopper 341 into the sliding groove when the stopper plate 325 moves toward the valve, thereby allowing the stopper plate 325 to move with a certain amount of margin.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A multi-modular switch cabinet comprising a switch cabinet body (100) and a trolley, wherein the trolley is movably arranged on the switch cabinet body (100) for connecting to bus contacts in the switch cabinet body (100), and the switch cabinet body (100) is provided with an upper valve (102) and a lower valve (103) for shielding the bus contacts when the trolley is withdrawn, characterized in that: Also includes: A valve opening and closing assembly (200), the valve opening and closing assembly (200) comprising a first rotating arm (210) and a second rotating arm (220) rotatably arranged on the switch cabinet body (100), the first rotating arm (210) and the second rotating arm (220) respectively connected to the upper valve (102) and the lower valve (103) and driving them to open and close, the upper valve (102) and the lower valve (103) being able to shield the busbar contact when in a closed position, and a first limiting portion (201) being provided on both the first rotating arm (210) and the second rotating arm (220); A self-locking module (300) is connected to the switch cabinet body (100), and the self-locking module (300) includes a second limiting portion (312), and the second limiting portion (312) is used to cooperate with the first limiting portion (201) to lock the first rotating arm (210) and the second rotating arm (220) in a closed position.

2. The multi-modular switchgear according to claim 1, characterized in that: The self-locking module (300) further comprises a trigger assembly (330), and when the trolley enters, the trigger assembly (330) can release the engagement between the second limiting portion (312) and the first limiting portion (201) under the push of the trolley.

3. The multi-modular switchgear according to claim 2, characterized in that: The self-locking module (300) further includes a sliding locking assembly (320), wherein the sliding locking assembly (320) includes a sliding block (321) movably arranged on the switch cabinet body (100), and the second limiting portion (312) is arranged on the sliding block (321); The sliding block (321) is located on a side of the first rotating arm (210) and the second rotating arm (220) facing the moving path of the trolley. When the trolley withdraws, the sliding block (321) can move under the drive of the trolley and drive the first rotating arm (210) and the second rotating arm (220) to a locked position.

4. The multi-modular switchgear according to claim 3, characterized in that: The self-locking module (300) comprises two second position-limiting portions (312) and a connecting rod (332) connecting the two second position-limiting portions (312); the connecting rod (332) is located on a side of the sliding block (321) away from the first rotating arm (210) and the second rotating arm (220); and the connecting rod (332) is provided with a pushing block (335); The trigger assembly (330) includes a trigger rod (333) movably connected to the switch cabinet body (100) and a trigger member (313) located at one end of the trigger rod (333) away from the push block (335). When the trolley enters, the trigger member (313) can move toward the push block (335) under the push of the trolley, and push the push block (335) through the trigger rod (333), so that the connecting rod (332) drives the second limiting portion (312) to engage with the first limiting portion (201).

5. The multi-modular switchgear according to claim 4, characterized in that: The self-locking module (300) further comprises a first resetting elastic member (334), which is sleeved on the outer periphery of the second limiting portion (312), and whose two ends act on the connecting rod (332) and the sliding block (321) respectively, and the first resetting elastic member (334) is used to elastically pull the connecting rod (332) so that the second limiting portion (312) and the first limiting portion (201) are engaged with each other.

6. The multi-modular switchgear according to claim 4, characterized in that: A closing elastic member is provided between the first rotating arm (210) and the second rotating arm (220), and is used to drive the first rotating arm (210) and the second rotating arm (220) to rotate to a closed position.

7. The multi-modular switchgear according to claim 6, characterized in that: The sliding block (321) further has two switch driving slots (322), and the first rotating arm (210) and the second rotating arm (220) are both provided with push rods (211), and the two push rods (211) respectively penetrate into the two switch driving slots (322); The switch drive slot (322) comprises a horizontal section (3222) parallel to the moving path of the trolley and a pushing section (3221) having an angle with the moving path of the trolley. The pushing section (3221) is located on one side of the horizontal section (3222) close to the upper valve (102) and the lower valve (103). The pushing sections (3221) of the two switch drive slots (322) can respectively push the first rotating arm (210) and the second rotating arm (220) to rotate to the open position when the sliding block (321) moves toward the side where the upper valve (102) is located.

8. The multi-modular switchgear according to claim 6, characterized in that: The trigger assembly (330) further comprises a guide rod (323) connected to the sliding block (321), and a limit plate (325) is provided at one end of the guide rod (323) away from the sliding block (321). When the trolley enters, the limit plate (325) can move toward the side where the upper valve (102) is located under the push of the trolley, and push the sliding block (321) to move toward the side where the upper valve (102) is located through the guide rod (323).

9. The multi-modular switchgear according to claim 8, characterized in that: The trigger assembly (330) further includes a protective cover (311) located on a side of the sliding block (321) away from the upper valve (102), the protective cover (311) being fixedly connected to the switch cabinet body (100), the trigger member (313) and the limit plate (325) both being located within the protective cover (311), and the trigger member (313) being located on a side of the limit plate (325) away from the sliding block (321); The guide rod (323) and the trigger rod (333) penetrate into the protective cover (311) and are respectively connected to the limit plate (325) and the trigger member (313).

10. The multi-modular switchgear according to claim 9, characterized in that: The trigger assembly (330) further includes a limiting assembly (340) located within the protective cover (311), the limiting assembly (340) being used to cooperate with the limiting plate (325) to limit the first rotating arm (210) and the second rotating arm (220) to an open position.

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