Handcart interlocking device of switch cabinet

Abstract

The utility model belongs to the technical field of switch equipment, and discloses a handcart interlocking device of a switch cabinet. The handcart interlocking device of the switch cabinet comprises a support, a door lock, an auxiliary switch and a plugging plate, the support is arranged on the inner side of the switch cabinet, the door lock penetrates through the inner wall of the switch cabinet and the support and fixes the support on the switch cabinet, the auxiliary switch is arranged on the support, and an auxiliary contact is arranged on the auxiliary switch. The auxiliary contact is connected into an electric closing loop of the high-voltage isolating switch in a normally closed manner, the blocking plate is connected with the door lock, the door lock is used for rotating the blocking plate, so that one end of the blocking plate is propped against the auxiliary contact, the electric closing loop is disconnected, and at the moment, the operating hole is opened by the blocking plate, so that electric operation during manual operation is avoided; or one end of the blocking plate is separated from the auxiliary contact, the electric closing loop is closed, and the blocking plate blocks the operation hole, so that manual operation during electric operation is avoided, safety of electric operation and manual operation is effectively realized, and safety of power equipment and operators is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of switchgear, in particular to a trolley interlock device for a switch cabinet. Background Art

[0002] A high-voltage switch cabinet is used for power generation, transmission, distribution, power conversion and consumption in a power system to perform functions such as switching on and off, control or protection.

[0003] During the operation of a high-voltage disconnector cabinet, it is necessary to strictly follow the "five-prevention" regulations. The "five-prevention" refers to: 1. Preventing the disconnector from being switched on or off under load; 2. Preventing the circuit breaker from being wrongly switched on or off; 3. Preventing the earthing switch from being closed under load; 4. Preventing load from being supplied when the earthing switch is closed; 5. Preventing unauthorized entry into the live working space. To avoid the occurrence of the above misoperation accidents, a reliable interlock device should be set for the high-voltage disconnector cabinet to ensure the correctness of the operation procedure and prevent the above five types of misoperations. However, the existing high-voltage disconnector cabinets lack a reliable trolley interlock device, which is likely to cause safety accidents.

[0004] Therefore, there is an urgent need for a trolley interlock device for a switch cabinet to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a trolley interlock device for a switch cabinet, so as to effectively realize the safety of electric operation and manual operation, and protect the safety of power equipment and operators.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A trolley interlock device for a switch cabinet, wherein the switch cabinet is provided with an operation hole, and the device includes:

[0008] A bracket, which is arranged inside the switch cabinet,

[0009] A door lock, at least part of which extends into the switch cabinet, passes through the bracket (100) and fixes the bracket on the inner wall of the switch cabinet;

[0010] An auxiliary switch, which is located inside the switch cabinet and arranged on the bracket. The auxiliary switch is provided with auxiliary contacts, and the auxiliary contacts are connected to the electric closing circuit of the high-voltage disconnector in a normally closed form;

[0011] A plugging plate, which is located between the inner wall of the switch cabinet and the bracket. The plugging plate is connected to the door lock. The door lock is used to rotate the plugging plate, so that one end of the plugging plate abuts against the auxiliary contacts, and the other end opens the operation hole, and the electric closing circuit is disconnected; or one end of the plugging plate is separated from the auxiliary contacts, and the other end plugs the operation hole, and the electric closing circuit is closed.

[0012] Optionally, the bracket includes:

[0013] A first fixing plate, the first fixing plate is attached to the inner wall of the switch cabinet, the door lock sequentially passes through the inner wall of the switch cabinet and the first fixing plate, and fixes the first fixing plate to the inner wall of the switch cabinet;

[0014] A first bending plate, which is arranged at one end of the first fixing plate, and the auxiliary switch is arranged on the first bending plate;

[0015] A connecting plate, which is arranged at one end of the first bending plate close to the first fixing plate. An avoidance hole is provided on the connecting plate. The avoidance hole is concentric with the operation hole, and there is a gap between the connecting plate and the inner wall of the switch cabinet. The plugging plate is connected to the door lock, and at least part of the plugging plate is located in the gap.

[0016] Optionally, the bracket further includes a second fixing plate, which is arranged at one end of the first bending plate away from the connecting plate, and the second fixing plate is fixedly attached to the inner wall of the switch cabinet.

[0017] Optionally, the bracket further includes:

[0018] A second bending plate, which is arranged at one end of the connecting plate away from the first bending plate;

[0019] A third fixing plate, which is arranged at one end of the second bending plate away from the connecting plate, and the third fixing plate is fixedly attached to the inner wall of the switch cabinet.

[0020] Optionally, the door lock includes a lock body, a lock core and a locking member. The lock core is rotatably arranged on the lock body. The lock body passes through the inner wall of the switch cabinet and the first fixing plate and is threadedly connected to the locking member. The plugging plate is connected to the lock core.

[0021] Optionally, a first polygonal hole is provided on the first fixing plate, a first polygonal mating part is provided on the lock body, and the first polygonal mating part passes through the first polygonal hole;

[0022] A second polygonal mating part is provided at the end of the lock core, a second polygonal hole is provided on the plugging plate, and the second polygonal mating part passes through the second polygonal hole.

[0023] Optionally, the plugging plate includes:

[0024] A fixing part, the fixing part is connected to the door lock;

[0025] A triggering part, the triggering part is arranged at one end of the fixing part, and the triggering part can abut against the auxiliary contact;

[0026] A bent portion and a blocking portion, the fixing portion and the blocking portion are parallel to each other, one end of the bent portion is connected to the fixing portion, the other end is connected to the blocking portion, and the blocking portion is located within the gap.

[0027] Optionally, the triggering portion includes a first trigger plate and a second trigger plate, the first trigger plate and the second trigger plate are arranged at a preset angle, and one end of the second trigger plate away from the first trigger plate is connected to the fixing portion.

[0028] Optionally, a first limiting platform is provided on the connecting plate, and one side of the bent portion close to the first bent plate can abut against the first limiting platform.

[0029] Optionally, a second limiting platform is provided at one end of the first fixing plate away from the first bent plate, and an abutting platform is provided on the blocking portion, and the abutting platform can abut against the second limiting platform.

[0030] Advantageous effects:

[0031] The handcart interlocking device of the switch cabinet provided by the present utility model includes a bracket, a door lock, an auxiliary switch and a blocking plate. The bracket is arranged inside the switch cabinet, at least part of the door lock extends into the switch cabinet, passes through the bracket and fixes the bracket on the switch cabinet; the auxiliary switch is located inside the switch cabinet and arranged on the bracket. An auxiliary contact is provided on the auxiliary switch, and the auxiliary contact is connected to the electric closing circuit of the high-voltage disconnector in a normally closed form. The blocking plate is located between the inner wall of the switch cabinet and the bracket, and the blocking plate is connected to the door lock. The door lock is used to rotate the blocking plate so that one end of the blocking plate abuts against the auxiliary contact, the auxiliary switch is changed from normally closed to normally open, and the electric closing circuit is disconnected. At this time, the blocking plate opens the operation hole to avoid electric operation during manual operation; or makes one end of the blocking plate separate from the auxiliary contact, the auxiliary switch is changed from normally open to normally closed, and the electric closing circuit is closed. At this time, the blocking plate blocks the operation hole to avoid manual operation during electric operation, thereby effectively realizing the safety of electric operation and manual operation, and protecting the safety of power equipment and operators. Description of the drawings

[0032] Figure 1 is a schematic structural diagram of the handcart interlocking device of the switch cabinet provided by the present utility model from one perspective;

[0033] Figure 2 is a schematic structural diagram of the handcart interlocking device of the switch cabinet provided by the present utility model from another perspective;

[0034] Figure 3 is a schematic structural diagram of the bracket provided by the present utility model from one perspective;

[0035] Figure 4It is a schematic structural view of the bracket provided by the present utility model from another perspective;

[0036] Figure 5 It is a schematic structural view of the door lock provided by the present utility model;

[0037] Figure 6 It is a schematic structural view of the plugging plate provided by the present utility model.

[0038] In the figure:

[0039] 100, bracket; 110, first fixing plate; 111, first polygonal hole; 112, second limiting platform; 120, first bending plate; 121, first plate; 122, second plate; 123, third plate; 124, fourth plate; 130, connecting plate; 131, avoiding hole; 132, first limiting platform; 140, second fixing plate; 150, second bending plate; 151, fifth plate; 152, sixth plate; 153, seventh plate; 160, third fixing plate;

[0040] 200, door lock; 210, lock body; 211, first polygonal mating part; 220, lock core; 221, second polygonal mating part;

[0041] 300, auxiliary switch; 310, auxiliary contact; 320, elastic piece;

[0042] 400, plugging plate; 410, fixing part; 411, second polygonal hole; 420, triggering part; 421, first triggering plate; 422, second triggering plate; 430, bending part; 440, plugging part; 441, abutting platform. Detailed implementation manners

[0043] The following further elaborates on the present utility model in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0044] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0046] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left" and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus cannot be construed as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] This embodiment provides a handcart interlocking device for a switch cabinet, as Figures 1-6 shown, the handcart interlocking device of the switch cabinet includes a bracket 100, a door lock 200, an auxiliary switch 300 and a plugging plate 400. There is an operation hole on the switch cabinet. At least part of the door lock 200 extends into the switch cabinet, passes through the bracket 100 and fixes the bracket 100 on the switch cabinet. The auxiliary switch 300 is located inside the switch cabinet and is arranged on the bracket 100. An auxiliary contact 310 is provided on the auxiliary switch 300. The auxiliary contact 310 is connected to the electric closing circuit of the high-voltage disconnector in a normally closed form. The plugging plate 400 is located between the inner wall of the switch cabinet and the bracket 100. The plugging plate 400 is connected to the door lock 200. The door lock 200 is used to rotate the plugging plate 400 so that one end of the plugging plate 400 abuts against the auxiliary contact 310, the auxiliary switch 300 is changed from normally closed to normally open, and the electric closing circuit is disconnected. At this time, the plugging plate 400 opens the operation hole to prevent electric operation during manual operation; or makes one end of the plugging plate 400 separate from the auxiliary contact 310, the auxiliary switch 300 is changed from normally open to normally closed, and the electric closing circuit is closed. At this time, the plugging plate 400 plugs the operation hole to prevent manual operation during electric operation, thereby effectively realizing the safety of electric operation and manual operation and protecting the safety of power equipment and operators.

[0048] Optionally, as Figure 2 、 Figure 3 and Figure 4As shown, the bracket 100 includes a first fixed plate 110, a first bent plate 120 and a connecting plate 130. The first fixed plate 110 is attached to the inner wall of the switch cabinet. The door lock 200 is sequentially inserted into the inner wall of the switch cabinet and the first fixed plate 110, and the first fixed plate 110 is fixed to the inner wall of the switch cabinet; the first bent plate 120 is arranged at one end of the first fixed plate 110, and the auxiliary switch 300 is arranged on the first bent plate 120; the connecting plate 130 is arranged at one end of the first bent plate 120 close to the first fixed plate 110, and an avoidance hole 131 is provided on the connecting plate 130. The avoidance hole 131 is concentric with the operating hole, and a gap is provided between the connecting plate 130 and the inner wall of the switch cabinet. The blocking plate 400 is connected to the door lock 200, and at least part of the blocking plate 400 is located in the gap, which can ensure that the blocking plate 400 is in a stable position when blocking the operating hole, thereby reducing the shaking of the blocking plate 400. In this embodiment, the first bending plate 120 provides an installation position for the auxiliary switch 300, and the first bending portion 430 protrudes toward the side of the inner wall away from the switch cabinet, which can make the auxiliary contact 310 on the auxiliary switch 300 more matched with the trigger portion 420 of the blocking plate 400, ensuring that the trigger portion 420 on the blocking plate 400 can accurately trigger the auxiliary switch 300.

[0049] Alternatively, if Figure 2 As shown, in this embodiment, the auxiliary switch 300 is fastened to the first bending plate 120 by screws, and a spring piece 320 is provided on the auxiliary switch 300, one end of the spring piece 320 is connected to the auxiliary switch 300 body, and the other end is overlapped on the auxiliary contact 310, and the trigger part 420 on the blocking plate 400 can press the auxiliary contact 310 through the spring piece 320.

[0050] Optionally, the bracket 100 further includes a second fixing plate 140, which is disposed at one end of the first bent plate 120 away from the connecting plate 130, and the second fixing plate 140 is fixedly attached to the inner wall of the switch cabinet, which can further improve the stability of the bracket 100. Specifically, the second fixing plate 140 can be fastened to the inner wall of the switch cabinet by screws, or fixed to the inner wall of the switch cabinet by bonding or welding.

[0051] Optionally, in this embodiment, if Figure 3 and Figure 4As shown, the first bending plate 120 includes a first plate 121, a second plate 122, a third plate 123, and a fourth plate 124. The first plate 121, the second plate 122, and the third plate 123 are sequentially connected to form a U-shaped bending structure. The first plate 121 is perpendicularly connected to the connecting plate 130, and the third plate 123 is perpendicularly connected to the second fixing plate 140. The auxiliary switch 300 is arranged on one side of the second plate 122 away from the inner wall of the switch cabinet to ensure that the auxiliary contact 310 of the auxiliary switch 300 is more matched with the triggering part 420 on the plugging plate 400. One end of the fourth plate 124 is perpendicularly connected to the second plate 122, and the other end is perpendicularly connected to the first fixing plate 110. The arrangement of the fourth plate 124 enables the first fixing plate 110 to fit on the inner wall of the switch cabinet, and a gap is formed between the connecting plate 130 and the inner wall of the switch cabinet, ensuring that the plugging plate 400 rotates more stably in the gap.

[0052] Optionally, as Figure 3 and Figure 4 shown, the bracket 100 further includes a second bending plate 150 and a third fixing plate 160. The second bending plate 150 is arranged at one end of the connecting plate 130 away from the first bending plate 120, and the third fixing plate 160 is arranged at one end of the second bending plate 150 away from the connecting plate 130. The third fixing plate 160 is fixedly attached to the inner wall of the switch cabinet, ensuring that the bracket 100 is more firmly connected to the inner wall of the switch cabinet. Moreover, the arrangement of the second bending plate 150 effectively improves the structural strength of the bracket 100, avoiding misoperations caused by the shaking or deformation of the bracket 100. In this embodiment, the third fixing plate 160 can be fixedly connected to the inner wall of the switch cabinet by screws, or can be fixed to the inner wall of the switch cabinet by bonding or welding.

[0053] Optionally, in this embodiment, the first fixing part, the first bending plate 120, the connecting plate 130, the second fixing plate 140, the second bending plate 150, and the third fixing plate 160 that form the bracket 100 are integrally formed, which can simplify the manufacturing process of the bracket 100 and improve the manufacturing efficiency of the bracket 100. In other embodiments, the first fixing part, the first bending plate 120, the connecting plate 130, the second fixing plate 140, the second bending plate 150, and the third fixing plate 160 that form the bracket 100 can be assembled and then welded to form the bracket 100.

[0054] Optionally, as Figure 3 and Figure 4As shown in the figure, the second bending plate 150 includes a fifth plate 151, a sixth plate 152, and a seventh plate 153. The fifth plate 151, the sixth plate 152, and the seventh plate 153 are sequentially connected to form a U-shaped bending structure. The fifth plate 151 is perpendicularly connected to the connecting plate 130, and the seventh plate 153 is perpendicularly connected to the third fixing plate 160, ensuring the structural strength of the bracket 100 and leaving enough space between the second bending plate 150 and the inner wall of the switch cabinet for the blocking plate 400 to rotate, preventing interference between the second bending part 430 and the rotating position of the blocking plate 400, and improving the smoothness of the rotation of the blocking plate 400.

[0055] Optionally, as Figure 5 shown, the door lock 200 includes a lock body 210, a lock core 220, and a locking member. The lock core 220 is rotatably arranged on the lock body 210. The lock body 210 passes through the inner wall of the switch cabinet and is threadedly connected to the first fixing plate 110 and the locking member. The blocking plate 400 is connected to the lock core 220, so that when the lock core 220 rotates, the blocking plate 400 can rotate accordingly, thereby realizing the function of blocking or opening the operation hole.

[0056] Optionally, the first fixing plate 110 is provided with a first polygonal hole 111, and the lock body 210 is provided with a first polygonal mating part 211. The first polygonal mating part 211 passes through the first polygonal hole 111, enabling the lock body 210 to achieve precise positioning during installation and preventing the lock body 210 from rotating relative to the bracket 100, thereby improving the stability of the position of the lock body 210.

[0057] Optionally, the end of the lock core 220 is provided with a second polygonal mating part 221, and the blocking plate 400 is provided with a second polygonal hole 411. The second polygonal mating part 221 passes through the second polygonal hole 411, enabling the blocking plate 400 to be precisely assembled at the end of the lock core 220 and preventing the blocking plate 400 from rotating relative to the lock core 220, ensuring that the blocking plate 400 rotates with the lock core 220 when the lock core 220 rotates, and then blocking or opening the operation hole.

[0058] In this embodiment, the shapes of the first polygonal hole 111 and the second polygonal hole 411 can be selected according to actual needs and can be designed into various geometric shapes such as quadrilateral holes, pentagonal holes, hexagonal holes, etc. Correspondingly, the shapes of the first polygonal mating part 211 and the second polygonal mating part 221 are also matched and designed into shapes such as quadrilateral, pentagonal, hexagonal, etc.

[0059] Optionally, as Figure 6As shown, the blocking plate 400 includes a fixing portion 410, a triggering portion 420, a bending portion 430, and a blocking portion 440. The fixing portion 410 is connected to the door lock 200. The triggering portion 420 is disposed at one end of the fixing portion 410 and can abut against the auxiliary contact 310. The fixing portion 410 and the blocking portion 440 are parallel to each other. One end of the bending portion 430 is connected to the fixing portion 410, and the other end is connected to the blocking portion 440, and the blocking portion 440 is located within the gap. The design of the bending portion 430 enables the blocking plate 400 to move flexibly within a limited space while maintaining the structural stability of the blocking plate 400, allowing the blocking plate 400 to rotate smoothly within the gap. In this embodiment, the fixing portion 410, the triggering portion 420, the bending portion 430, and the blocking portion 440 on the blocking plate 400 are integrally formed, simplifying the manufacturing process of the blocking plate 400 and improving the manufacturing efficiency of the blocking plate 400. In other embodiments, the blocking plate 400 can be manufactured by assembling and then welding.

[0060] Optionally, the triggering portion 420 includes a first triggering plate 421 and a second triggering plate 422. The first triggering plate 421 and the second triggering plate 422 are arranged at a preset angle. One end of the second triggering plate 422 away from the first triggering plate 421 is connected to the fixing portion 410. The preset angle between the first triggering plate 421 and the second triggering plate 422 enables the first triggering plate 421 to accurately trigger the auxiliary contact 310, improving the accuracy of triggering. Specifically, the preset angle between the first triggering plate 421 and the second triggering plate 422 can be adjusted according to different application scenarios, specifically, it can be 90°, 80°, 70°, 60°, 50°, 40°, 30°, 40°, 30°, 20°, 10°, etc. In this embodiment, the preset angle between the first triggering plate 421 and the second triggering plate 422 is preferably 90°.

[0061] Optionally, a first limiting platform 132 is provided on the connecting plate 130. One side of the bending portion 430 close to the first bending plate 120 can abut against the first limiting platform 132. It can be understood that when the blocking plate 400 rotates to the position of the blocking operation hole, the bending portion 430 contacts the first limiting platform 132, preventing the blocking plate 400 from further rotating, thereby preventing the blocking plate 400 from rotating out of position and ensuring that the blocking plate 400 accurately blocks the operation hole.

[0062] Optionally, a second limiting platform 112 is provided at one end of the first fixing plate 110 away from the first bending plate 120, and an abutting platform 441 is provided on the blocking portion 440. The abutting platform 441 can abut against the second limiting platform 112. When the blocking plate 400 rotates to the position of opening the operation hole, the abutting platform 441 contacts the second limiting platform 112 to prevent the blocking plate 400 from continuing to rotate. At this time, the first trigger plate 421 of the triggering portion 420 just abuts against the auxiliary contact 310, avoiding further applying pressure on the auxiliary switch 300 by the triggering portion 420 and effectively protecting the auxiliary switch 300.

[0063] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. The handcart interlocking device of the switch cabinet, wherein an operation hole is provided on the switch cabinet, and it is characterized in that Comprising: A bracket (100), disposed inside the switchgear cabinet; A door lock (200), at least part of the door lock (200) extends into the switchgear cabinet, and passes through the bracket (100) and fixes the bracket (100) to the switchgear cabinet; An auxiliary switch (300), located inside the switchgear cabinet and disposed on the bracket (100), an auxiliary contact (310) is provided on the auxiliary switch (300), and the auxiliary contact (310) is connected to the electric closing circuit of the high-voltage disconnector in a normally closed form; A plugging plate (400), located between the inner wall of the switchgear cabinet and the bracket (100), the plugging plate (400) is connected to the door lock (200), and the door lock (200) is used to rotate the plugging plate (400) so that one end of the plugging plate (400) abuts against the auxiliary contact (310) and the other end opens the operation hole; or separates one end of the plugging plate (400) from the auxiliary contact (310) and the other end plugs the operation hole.

2. The handcart interlocking device of the switch cabinet according to claim 1, characterized in that, The bracket (100) includes: A first fixing plate (110), the first fixing plate (110) is attached to the inner wall of the switchgear cabinet, the door lock (200) passes through the inner wall of the switchgear cabinet and the first fixing plate (110) in sequence, and fixes the first fixing plate (110) to the inner wall of the switchgear cabinet; A first bending plate (120), disposed at one end of the first fixing plate (110), the auxiliary switch (300) is disposed on the first bending plate (120); A connecting plate (130), disposed at one end of the first bending plate (120) close to the first fixing plate (110), an avoidance hole (131) is provided on the connecting plate (130), the avoidance hole (131) is concentric with the operation hole, and there is a gap between the connecting plate (130) and the inner wall of the switchgear cabinet, the plugging plate (400) is connected to the door lock (200), and at least part of the plugging plate (400) is located in the gap.

3. The handcart interlock device of the switch cabinet according to claim 2, characterized in that, The bracket (100) further includes a second fixing plate (140), disposed at one end of the first bending plate (120) away from the connecting plate (130), and the second fixing plate (140) is fixedly attached to the inner wall of the switchgear cabinet.

4. The handcart interlock device of the switch cabinet according to claim 2, characterized in that, The bracket (100) further includes: A second bending plate (150), disposed at one end of the connecting plate (130) away from the first bending plate (120); A third fixing plate (160), disposed at one end of the second bending plate (150) away from the connecting plate (130), and the third fixing plate (160) is fixedly attached to the inner wall of the switchgear cabinet.

5. The handcart interlock device of the switch cabinet according to claim 2, characterized in that, The door lock (200) includes a lock body (210), a lock core (220) and a locking member, the lock core (220) is rotatably disposed on the lock body (210), the lock body (210) passes through the inner wall of the switchgear cabinet and is threadedly connected to the first fixing plate (110) and the locking member, and the plugging plate (400) is connected to the lock core (220).

6. The handcart interlocking device of the switch cabinet according to claim 5, characterized in that, The first fixing plate (110) is provided with a first polygonal hole (111), and the lock body (210) is provided with a first polygonal fitting portion (211), and the first polygonal fitting portion (211) is inserted into the first polygonal hole (111). One end of the lock core (220) is provided with a second polygonal fitting portion (221), and the plugging plate (400) is provided with a second polygonal hole (411), and the second polygonal fitting portion (221) is inserted into the second polygonal hole (411).

7. The handcart interlocking device of the switch cabinet according to claim 2, characterized in that, The plugging plate (400) includes: A fixing portion (410), and the fixing portion (410) is connected to the door lock (200); A triggering portion (420), and the triggering portion (420) is arranged at one end of the fixing portion (410), and the triggering portion (420) can abut against the auxiliary contact point (310); A bending portion (430) and a plugging portion (440), the fixing portion (410) and the plugging portion (440) are parallel to each other, one end of the bending portion (430) is connected to the fixing portion (410), the other end is connected to the plugging portion (440), and the plugging portion (440) is located in the gap.

8. The handcart interlocking device of the switch cabinet according to claim 7, characterized in that, The triggering portion (420) includes a first triggering plate (421) and a second triggering plate (422), the first triggering plate (421) and the second triggering plate (422) are arranged at a preset included angle, and one end of the second triggering plate (422) away from the first triggering plate (421) is connected to the fixing portion (410).

9. The handcart interlocking device of the switch cabinet according to claim 7, characterized in that, The connecting plate (130) is provided with a first limiting platform (132), and one side of the bending portion (430) close to the first bending plate (120) can abut against the first limiting platform (132).

10. The handcart interlock device of the switchgear according to claim 7, characterized in that, One end of the first fixing plate (110) away from the first bending plate (120) is provided with a second limiting platform (112), and the plugging portion (440) is provided with an abutting platform (441), and the abutting platform (441) can abut against the second limiting platform (112).

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