Transformer substation cabinet locking mechanism

Abstract

The invention relates to the technical field of transformer substation cabinets, and discloses a transformer substation cabinet locking mechanism which comprises a cabinet door, a sealing strip and a locking unit, the sealing strip and the locking unit are both arranged on the inner side face of the cabinet door, one end of the locking unit is connected with the cabinet door, and the other end of the locking unit is connected with the inner side of a box body frame at the pressing position of the sealing strip. The locking unit comprises door lock pieces, a lock pressing plate piece and a balance assembly, the door lock pieces are arranged on the inner side face of the cabinet door, the lock pressing plate piece is arranged on the door lock pieces, the door lock pieces are located in the middle of the lock pressing plate piece, the door lock pieces are used for serving as reference fulcrums for moment balance of the two ends of the lock pressing plate piece, one end of the lock pressing plate piece is connected with the sealing strip, and the other end of the lock pressing plate piece is connected with the balance assembly. The other end of the lock pressing plate piece is connected with the balance assembly, the balance assembly comprises an installation base and an elastic piece, the installation base is fixed to the cabinet door, one end of the elastic piece is connected with the installation base, the other end of the elastic piece is connected with the lock pressing plate piece, pressure of all locking points is effectively balanced, and the situation that locking force of all locks of the cabinet door is inconsistent is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer substation cabinets, and in particular to a transformer substation cabinet locking mechanism. Background Art

[0002] Substation cabinets are prefabricated, compact indoor and outdoor power distribution equipment that integrates high-voltage switchgear, distribution transformers, and low-voltage distribution devices according to a specific wiring scheme. These cabinets organically combine transformer step-down and low-voltage distribution functions within a fully enclosed, removable steel structure that is moisture-proof, rust-proof, dust-proof, rodent-proof, fire-proof, theft-proof, and heat-insulated. The cabinets are mechatronic and operate in a fully enclosed environment. Within substation cabinet systems, the sealing design of the cabinet doors is crucial for ensuring stable equipment operation, extending equipment life, and ensuring a safe and reliable power supply.

[0003] Currently, existing sealing designs for substation cabinet doors often employ multiple locking points on the door to improve sealing. However, due to numerous uncontrollable factors, such as welding deformation between the cabinet body and the door, machining errors, and stress deformation, the locking force of each door lock is inconsistent. This inconsistent locking force can lead to varying deformation of the sealing strip. Where the locking force is too high, the sealing strip is squeezed beyond its elastic limit, causing excessive deformation. This is like over-compressing a spring; when the external force is removed, the spring may not return to its original shape. After excessive deformation, the sealing strip's elastic recovery ability is greatly reduced, and it may even fail to rebound. This ineffectively seals the gap between the door and the cabinet body, relying on the strip's elasticity. This allows dust, moisture, and other external factors to easily enter and damage the electrical equipment within the cabinet. Summary of the Invention

[0004] The purpose of the present invention is to provide a substation cabinet locking mechanism, which effectively solves the problem in the prior art that the locking force of the cabinet door sealing strip is different at different locations, resulting in external dust and moisture entering the cabinet through the sealing strip and causing damage to the power equipment.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a substation cabinet locking mechanism, which includes a cabinet door, a sealing strip and a locking unit. The sealing strip and the locking unit are both arranged on the inner side of the cabinet door. One end of the locking unit is connected to the cabinet door, and the other end is connected to the sealing strip. The locking unit includes a door lock, a locking plate and a balancing assembly. The door lock is arranged on the inner side of the cabinet door, the locking plate is arranged on the door lock, and the door lock is located in the middle of the locking plate. The door lock is used as a reference fulcrum for the moment balance at both ends of the locking plate. One end of the plate is connected to the inner side of the box frame where the sealing strip is pressed, and the other end of the locking plate is connected to the balancing assembly. The balancing assembly includes a mounting seat and an elastic member. The mounting seat is fixed on the cabinet door, one end of the elastic member is connected to the mounting seat, and the other end is connected to the locking plate; wherein, the balancing assembly applies a pre-compression force in the vertical direction upward to one end of the locking plate, and the sealing strip applies a locking force in the vertical direction upward to the other end of the locking plate, and the elastic member is used to adjust the pre-compression force at one end of the locking plate, thereby making the forces at both ends of the locking plate balanced.

[0006] In one embodiment, the balancing assembly also includes a wedge pressure plate and a guide member. The wedge pressure plate is arranged at the bottom of the locking plate. There are two guide members, which are respectively arranged at both ends of the wedge pressure plate. One end of the guide member is connected to the cabinet door, and the other end is connected to the wedge pressure plate.

[0007] In one embodiment, the wedge-shaped pressure plate includes a pressure plate body and a connecting plate. The pressure plate body is in an arc shape that convexes outward away from the cabinet door. The locking plate is arranged at the top of the pressure plate body, and the locking plate moves circumferentially along the pressure plate body. There are two connecting plates, which are arranged in a horizontal direction. The connecting plates are respectively arranged at both ends of the pressure plate body, and the connecting plates are connected to the guide members.

[0008] In one embodiment, the guide member includes a guide sleeve and a guide shaft, one end of the guide sleeve is connected to the wedge pressure plate, the guide sleeve is arranged on the outer periphery of the guide shaft, the end of the guide shaft away from the guide sleeve is connected to the cabinet door, and the guide sleeve moves back and forth in the vertical direction.

[0009] In one embodiment, the guide member further includes a pin member, and both the guide sleeve and the guide shaft are provided with clearance holes, and the pin member is inserted into the clearance hole to limit the movement of the guide sleeve in the vertical direction.

[0010] In one embodiment, the mounting seat and the elastic member are both located between two adjacent guide members, the elastic member is disposed inside the mounting seat, the elastic member is connected to the pressure plate body, and the material of the elastic member is an elastic member.

[0011] In one embodiment, a through hole for the door lock to pass through is provided in the middle of the locking plate, and the locking plate includes two arc-shaped pressure blocks, which are respectively provided at both ends of the through hole, and one end of the arc-shaped pressure block is connected to the locking plate, and the other end is connected to the door lock.

[0012] In one embodiment, the arc-shaped pressure block causes the locking plate to swing along the circumference of the door lock, driving the locking plate to swing on the pressure plate body. The locking plate adjusts the compression amount of the elastic member, thereby changing the pre-tightening force at one end of the locking plate.

[0013] In one embodiment, a fastener is provided at one end of the door lock component close to the locking plate component, and the fastener is used to fix the door lock component after the door lock component passes through the locking plate component.

[0014] In one embodiment, there are multiple locking units, and the multiple locking units are sequentially arranged along the inner circumference of the sealing strip.

[0015] Furthermore, the number of locking units is five.

[0016] Compared with the prior art, the locking mechanism of a substation cabinet in an embodiment of the present invention has the following beneficial effects: through the design of the locking unit, the door lock serves as a reference fulcrum for the torque balance at both ends of the locking plate, the balancing component applies a pre-compression force to one end of the locking plate, and the sealing strip applies a locking force to the other end of the locking plate. Under the adjustment of the elastic component, the forces at both ends of the locking plate are balanced, thereby ensuring that the sealing strip can fit evenly and tightly on the cabinet, effectively improving the sealing performance of the cabinet, preventing external dust, moisture, etc. from entering the interior of the cabinet, protecting the internal electrical equipment from environmental influences, and ensuring the normal operation of the equipment; the locking unit is composed of a door lock, a locking plate and a balancing component, the connection relationship between the components is clear, and the structural layout is reasonable. The door lock is set vertically, the locking plate is set horizontally, and the door lock is located in the middle of the locking plate. This design enables the entire locking mechanism to maintain good stability when under force, and is not prone to loosening or deformation. The elastic part in the balancing component can adjust the pre-tightening force at one end of the locking plate according to actual conditions. When the locking force of the sealing strip changes due to long-term use or environmental factors, the elastic part can automatically adjust the pre-tightening force through its own expansion and contraction deformation, so that the two ends of the locking plate always maintain force balance, thereby maintaining a good sealing effect, reducing manual intervention and maintenance costs, effectively balancing the pressure of each locking point, and improving the inconsistent locking force of each lock of the cabinet door. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall cross-sectional view of the substation cabinet locking mechanism according to an embodiment of the present invention.

[0018] Figure 2It is a structural schematic diagram of a substation cabinet locking mechanism according to an embodiment of the present invention.

[0019] Figure 3 It is a top view of the substation cabinet locking mechanism according to an embodiment of the present invention.

[0020] Figure 4 It is a cross-sectional view of a locking unit in a substation cabinet locking mechanism according to an embodiment of the present invention.

[0021] Figure 5 It is a schematic diagram of the installation of the substation cabinet locking mechanism according to an embodiment of the present invention.

[0022] Figure 6 yes Figure 5 A partial enlarged view of point A in the middle.

[0023] In the figure, 10, cabinet door;

[0024] 20. Sealing strip;

[0025] 30. Locking unit; 31. Door lock; 311. Fastener; 32. Locking plate; 321. Arc-shaped pressure block; 33. Balancing assembly; 331. Wedge-shaped pressure plate; 3311. Pressure plate body; 3312. Connecting plate; 332. Guide member; 3321. Guide sleeve; 3322. Guide shaft; 3323. Pin member; 333. Elastic member; 334. Mounting seat. DETAILED DESCRIPTION

[0026] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0027] In the description of the present invention, it should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element. The terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, it may be internal communication between two elements or an interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the description of the present invention, it should be understood that the terms "height", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In the description of the present invention, it should be understood that the terms "first" and "second" are used in the present invention for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0030] like Figures 1 to 6 As shown, an embodiment of the present invention preferably provides a substation cabinet locking mechanism, which includes a cabinet door 10, a sealing strip 20 and a locking unit 30. The sealing strip 20 and the locking unit 30 are both arranged on the inner side of the cabinet door 10. One end of the locking unit 30 is connected to the cabinet door 10, and the other end is connected to the inner side of the box frame where the sealing strip 20 is pressed. The locking unit 30 includes a door lock 31, a locking plate 32 and a balancing assembly 33. The door lock 31 is arranged on the inner side of the cabinet door 10, and the locking plate 32 is arranged on the door lock 31. The door lock 31 is located in the middle of the locking plate 32. The door lock 31 is used as a reference fulcrum for moment balance at both ends of the locking plate 32 When the locking plate 32 is unlocked, one end of the locking plate 32 is connected to the inner side of the box frame where the sealing strip 20 is pressed, and the other end of the locking plate 32 is connected to the balancing assembly 33, and the balancing assembly 33 includes a mounting seat 334 and an elastic member 333, which is fixed to the cabinet door 10, and one end of the elastic member 333 is connected to the mounting seat 334, and the other end is connected to the locking plate 32; wherein, the balancing assembly applies a pre-tightening force in the vertical direction to one end of the locking plate 32, and the sealing strip 20 applies a locking force in the vertical direction to the other end of the locking plate 32, and the elastic member 333 is used to adjust the pre-tightening force at one end of the locking plate 32, thereby making the forces at both ends of the locking plate 32 balanced.

[0031] Based on the above technical features, the embodiment of the present invention adopts the design of the locking unit 30, and the door lock 31 serves as the reference fulcrum for the torque balance at both ends of the locking plate 32. The balancing component 33 applies a pre-tightening force to one end of the locking plate 32, and the sealing strip 20 applies a locking force to the other end of the locking plate 32. Under the adjustment action of the elastic member 333, the forces at both ends of the locking plate 32 are balanced, thereby ensuring that the sealing strip 20 can fit evenly and tightly on the cabinet, effectively improving the sealing performance of the cabinet, preventing external dust, moisture, etc. from entering the interior of the cabinet, protecting the internal electrical equipment from environmental influences, and ensuring the normal operation of the equipment; the locking unit 30 is composed of the door lock 31, the locking plate 32 and the balancing component 33. The connection relationship between the components is clear and the structural layout is reasonable. The door lock 31 is arranged vertically, the locking plate 32 is arranged horizontally, and the door lock 31 is located in the middle of the locking plate 32. This design enables the entire locking mechanism to maintain good stability when under force, and is not prone to loosening or deformation. The elastic member 333 in the balancing assembly 33 can adjust the pre-tightening force at one end of the locking plate 32 according to actual conditions. When the locking force of the sealing strip 20 changes due to long-term use or environmental factors, the elastic member 333 can automatically adjust the pre-tightening force through its own expansion and contraction deformation, so that the two ends of the locking plate 32 always maintain a force balance, thereby maintaining a good sealing effect and reducing manual intervention and maintenance costs.

[0032] As some embodiments of the present invention, Figures 2 to 3 As shown, the balancing assembly 33 also includes a wedge-shaped pressure plate 331 and a guide member 332. The wedge-shaped pressure plate 331 is disposed at the bottom of the locking plate 32. There are two guide members 332, one at each end of the wedge-shaped pressure plate 331, one end of the guide member 332 is connected to the cabinet door 10, and the other end is connected to the wedge-shaped pressure plate 331. The two guide members 332 are disposed at each end of the wedge-shaped pressure plate 331, one end of the guide member 332 is connected to the cabinet door 10, and the other end is connected to the wedge-shaped pressure plate 331. This design provides a precise guide path for the movement of the wedge-shaped pressure plate 331 (and thus affects the movement of the locking plate 32). During the locking or unlocking process, the locking plate 32 will be displaced due to the force applied. The guide members 332 can ensure that the locking plate 32 moves in the predetermined direction, avoiding deviation, shaking, etc., and ensuring the accuracy and stability of the locking action. The wedge-shaped pressure plate 331 is located at the bottom of the locking plate 32. Its unique wedge-shaped structure evenly transmits force to the locking plate 32 when subjected to force. When the elastic member 333 and other components apply force to the wedge-shaped pressure plate 331, the wedge-shaped pressure plate 331 converts this force into uniform pressure on the locking plate 32, making the force on each part of the locking plate 32 more balanced.

[0033] As some embodiments of the present invention, Figures 2 to 3As shown, the wedge-shaped pressure plate 331 includes a pressure plate body 3311 and a connecting plate 3312. The pressure plate body 3311 is in an arc shape that convexes outwardly away from the cabinet door 10. The locking plate 32 is disposed at the top of the pressure plate body 3311 and moves circumferentially along the pressure plate body 3311. There are two connecting plates 3312, which are disposed horizontally and are disposed at both ends of the pressure plate body 3311. The connecting plates 3312 are connected to the guide member 332. The pressure plate body 3311 is in an arc shape that convexes outwardly away from the cabinet door 10. This shape ensures that when the elastic member 333 and other components apply force to the wedge-shaped pressure plate 331, the force is evenly distributed along the arc surface. The locking plate 32 is disposed at the top of the pressure plate body 3311. The arc structure can convert the applied force into a relatively uniform pressure on the locking plate 32, avoiding the situation where the pressure is too high or too low in some areas. The pressure plate member moves circumferentially along the pressure plate body 3311. The curved pressure plate body 3311 provides a suitable movement trajectory for the locking plate member 32. During the locking or unlocking process, the locking plate member 32 slides on the curved surface. The curved structure reduces resistance to the movement of the locking plate member 32, making its movement smoother. There are two connecting plates 3312, arranged horizontally, one at each end of the pressure plate body 3311 and connected to the guide member 332. This design ensures a more stable and reliable connection between the wedge-shaped pressure plate 331 and the guide member 332. The horizontally arranged connecting plates 3312 ensure that the restraining force of the guide member 332 on the wedge-shaped pressure plate 331 is evenly distributed, preventing the wedge-shaped pressure plate 331 from shifting or shaking during movement due to an unstable connection. The design of two connecting plates 3312 makes the installation of the wedge-shaped pressure plate 331 and the guide member 332 more convenient. During installation, only the connecting plates 3312 need to be connected to the guide member 332, making the operation simple and quick. At the same time, the horizontal setting of the connecting plate 3312 also facilitates positioning and adjustment, thereby improving installation efficiency.

[0034] As some embodiments of the present invention, Figures 2 to 3As shown, the guide member 332 includes a guide sleeve 3321 and a guide shaft 3322. One end of the guide sleeve 3321 is connected to the wedge-shaped pressure plate 331. The guide sleeve 3321 is arranged on the outer periphery of the guide shaft 3322. The end of the guide shaft 3322, which is away from the guide sleeve 3321, is connected to the cabinet door 10. The guide sleeve 3321 moves back and forth in the vertical direction. The guide sleeve 3321 is arranged on the outer periphery of the guide shaft 3322 and moves back and forth in the vertical direction. This structure ensures that the wedge-shaped pressure plate 331 can only move linearly in the vertical direction. During the locking or unlocking process, the locking plate 32 must be accurately moved to the specified position to achieve a good fit with the sealing strip 20. The cooperation between the guide sleeve 3321 and the guide shaft 3322 is like the relationship between a train and a railroad track. When a train travels along the railroad track, it can only move in a fixed straight line, thus ensuring the accuracy of the movement of the locking plate 32. The guide sleeve 3321 and the guide shaft 3322 form a sliding friction pair, and the contact surface of the pair is carefully designed and processed to ensure good sliding performance. Compared with some rough contact surfaces, the friction coefficient of this sliding friction pair is smaller, reducing energy loss and wear during movement.

[0035] As some embodiments of the present invention, Figures 2 to 3 As shown, the guide member 332 also includes a pin member 3323. The guide sleeve 3321 and the guide shaft 3322 are both provided with clearance holes (not shown in the figure). The pin member 3323 is inserted into the clearance holes to limit the vertical movement of the guide sleeve 3321. The guide sleeve 3321 and the guide shaft 3322 are provided with clearance holes, and the pin member 3323 is inserted into the clearance holes. This design can accurately position and fix the guide sleeve 3321 at a specific position. After the locking mechanism completes the locking action, by inserting the pin member 3323 into the corresponding clearance hole, the guide sleeve 3321 can be prevented from continuing to move in the vertical direction, thereby ensuring that the locking plate 32 and the sealing strip 20 remain in the correct locking position, making the locking state stable and reliable. By providing multiple clearance holes in the guide sleeve 3321 and guide shaft 3322, the pin 3323 can be inserted into different clearance holes according to actual needs, thereby adjusting the position of the guide sleeve 3321 and, in turn, changing the degree of locking of the locking plate 32 and the sealing strip 20. This flexible adjustment method allows the locking mechanism to adapt to cabinets of different sizes and with different sealing requirements, thereby improving its versatility and applicability.

[0036] As some embodiments of the present invention, Figures 1 to 4As shown, the mounting seat 334 and the elastic member 333 are both located between two adjacent guide members 332. The elastic member 333 is disposed inside the mounting seat 334 and is connected to the pressure plate body 3311. The elastic member 333 is made of elastic member 333. The mounting seat 334 and the elastic member 333 are both located between two adjacent guide members 332. This layout fully utilizes the space between the guide members 332, making the structure of the locking mechanism more compact. The guide member 332 provides guidance for the movement of the wedge-shaped pressure plate 331 (including the pressure plate body 3311), while the elastic member 333 is connected to the pressure plate body 3311 to provide elastic force for the pressure plate body 3311. Arranging them in adjacent positions allows the guidance and elastic force to work together better. During the locking or unlocking process, the guide member 332 guides the movement of the wedge-shaped pressure plate 331, and the elastic member 333 automatically adjusts the elastic force according to the movement of the pressure plate body 3311, ensuring the coordinated and consistent operation of the entire locking mechanism.

[0037] As some embodiments of the present invention, Figures 1 to 4 As shown, the middle portion of the locking plate 32 is provided with a through hole for the door lock 31 to pass through. The locking plate 32 includes two arc-shaped pressure blocks 321, each of which is disposed at either end of the through hole. One end of the arc-shaped pressure block 321 is connected to the locking plate 32, and the other end is connected to the door lock 31. The through hole provided in the middle portion of the locking plate 32 for the door lock 31 to pass through provides a clear positioning and channel for the installation of the door lock 31. During installation, the door lock 31 only needs to be passed through the through hole to quickly complete the initial connection between the door lock 31 and the locking plate 32, greatly simplifying the installation process and improving installation efficiency. There are two arc-shaped pressure blocks 321, each disposed at either end of the through hole. This design enables the arc-shaped pressure blocks 321 to apply pressure to the sealing strip 20 from two directions during the locking process. The arc-shaped structure can evenly distribute the pressure on the sealing strip 20, avoiding the situation where the local pressure is too high or too low, and improving the sealing effect.

[0038] As some embodiments of the present invention, Figures 1 to 4As shown, the arc-shaped pressure block 321 enables the locking plate 32 to swing along the circumference of the door lock 31, driving the locking plate 32 to swing on the pressure plate body 3311. The locking plate 32 adjusts the amount of compression on the elastic member 333, thereby changing the pre-compression force at one end of the locking plate 32. The pre-compression force needs to be adjusted to ensure the sealing effect. The arc-shaped pressure block 321 enables the locking plate 32 to swing along the circumference of the door lock 31, thereby adjusting the amount of compression on the elastic member 333. The pre-compression force at one end of the locking plate 32 can be flexibly changed to meet the sealing requirements under different working conditions. The swinging of the locking plate 32 to adjust the pre-compression force can make the pressure applied by the locking plate 32 to the sealing strip 20 more uniform. During the locking process, the uniform pressure can ensure that the sealing strip 20 is in full and close contact with the cabinet door 10, eliminating the problem of local lax sealing and improving the reliability and stability of the seal.

[0039] As some embodiments of the present invention, Figures 1 to 4 As shown, a fastener 311 is provided at one end of the door lock 31 near the locking plate 32. Fastener 311 is used to secure the door lock 31 after it passes through the locking plate 32. Once the door lock 31 passes through the locking plate 32, fastener 311 secures the door lock 31, effectively preventing it from loosening during use. Substation cabinets may be subject to external factors such as vibration and impact during use. Without fastener 311, the door lock 31 may gradually loosen, causing the locking mechanism to fail and failing to ensure the cabinet's seal and safety. The securing effect of fastener 311 ensures that the door lock 31 and the locking plate 32 form a stable, integrated structure. During the locking process, the door lock 31 applies pressure to the sealing strip 20 through the locking plate 32, sealing the cabinet. The presence of fastener 311 ensures the stability of this pressure transmission, ensuring that the locked state is maintained over time without being affected by movement of the door lock 31.

[0040] As some embodiments of the present invention, Figures 5 and 6 As shown, there are multiple locking units 30, which are arranged continuously along the inner circumference of the sealing strip 20. These locking units 30 are arranged continuously along the inner circumference of the sealing strip 20, applying pressure to the sealing strip 20 from all directions, achieving full coverage and compression of the sealing strip 20. When subjected to uniform pressure, the sealing strip 20 can better adhere to the cabinet door 10, filling the gap between the door 10 and the cabinet body, effectively preventing dust, moisture, and harmful gases from entering the cabinet interior.

[0041] Furthermore, the number of the locking units 30 is five.

[0042] Furthermore, when the locking force is too strong, the locking torque exceeds the pre-compression torque, causing the locking plate 32 to rotate slightly clockwise around the fulcrum. This causes the wedge-shaped pressure plate 331 to move leftward, further compressing the elastic member 333 and increasing the pre-compression force. The locking plate 32 stops rotating until the pre-compression torque equals the locking torque. At this point, the locking plate 32 has rotated clockwise by a certain angle, reducing the compression of the sealing strip 20 and the locking force.

[0043] At the same time, when the locking force is relatively weak, the locking torque is less than the pre-compression torque, and the locking plate 32 rotates slightly counterclockwise about the fulcrum, driving the wedge-shaped pressure plate 331 to the right. The compression of the elastic member 333 decreases, and the pre-compression force decreases. The locking plate 32 stops rotating until the pre-compression torque equals the locking torque. At this point, the locking plate 32 rotates counterclockwise by a certain angle, the compression of the sealing strip 20 increases, and the locking force also increases.

[0044] In summary, the embodiment of the present invention provides a substation cabinet locking mechanism, which has the following beneficial effects compared with the prior art: through the design of the locking unit 30, the door lock 31 serves as a reference fulcrum for the torque balance at both ends of the locking plate 32, the balancing component 33 applies a pre-tightening force to one end of the locking plate 32, and the sealing strip 20 applies a locking force to the other end of the locking plate 32. Under the adjustment action of the elastic member 333, the forces at both ends of the locking plate 32 are balanced, thereby ensuring that the sealing strip 20 can fit evenly and tightly on the cabinet, effectively improving the sealing performance of the cabinet, preventing external dust, moisture, etc. from entering the interior of the cabinet, protecting the internal electrical equipment from environmental influences, and ensuring the normal operation of the equipment; the locking unit 30 is composed of the door lock 31, the locking plate 32 and the balancing component 33, the connection relationship between the components is clear, and the structural layout is reasonable. The door lock 31 is set vertically, the locking plate 32 is set horizontally, and the door lock 31 is located in the middle of the locking plate 32. This design enables the entire locking mechanism to maintain good stability when under force and is not prone to loosening or deformation. The elastic member 333 in the balancing assembly 33 can adjust the pre-tightening force at one end of the locking plate 32 according to actual conditions. When the locking force of the sealing strip 20 changes due to long-term use or environmental factors, the elastic member 333 can automatically adjust the pre-tightening force through its own expansion and contraction deformation, so that the two ends of the locking plate 32 always maintain a force balance, thereby maintaining a good sealing effect, reducing manual intervention and maintenance costs, effectively balancing the pressure of each locking point, and improving the inconsistent locking force of each lock of the cabinet door 10.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A substation cabinet locking mechanism, characterized in that: include: A cabinet door (10), a sealing strip (20) and a locking unit (30), wherein the sealing strip (20) and the locking unit (30) are both arranged on the inner side of the cabinet door (10), one end of the locking unit (30) is connected to the cabinet door (10), and the other end is connected to the inner side of the box frame at the location where the sealing strip (20) is pressed. The locking unit (30) comprises a door lock (31), a locking plate (32) and a balancing assembly (33), wherein the door lock (31) is arranged on the inner side of the cabinet door (10), the locking plate (32) is arranged on the door lock (31), and the door lock (31) is located in the middle of the locking plate (32), and the door lock (31) is used as a reference fulcrum for moment balance at both ends of the locking plate (32). One end of the member (32) is connected to the inner side of the box frame at the location where the sealing strip (20) is pressed, and the other end of the locking plate member (32) is connected to the balancing assembly (33), and the balancing assembly (33) includes a mounting seat (334) and an elastic member (333), and the mounting seat (334) is fixed on the cabinet door (10), and one end of the elastic member (333) is connected to the mounting seat (334), and the other end is connected to the locking plate member (32); The balancing component (33) applies a pre-compression force in the vertical upward direction to one end of the locking plate (32), the sealing strip (20) applies a locking force in the vertical upward direction to the other end of the locking plate (32), and the elastic member (333) is used to adjust the pre-compression force at one end of the locking plate (32), thereby balancing the forces at both ends of the locking plate (32).

2. The substation cabinet locking mechanism according to claim 1, characterized in that: The balancing assembly (33) further includes a wedge-shaped pressure plate (331) and a guide member (332), wherein the wedge-shaped pressure plate (331) is arranged at the bottom of the locking plate (32), and the number of the guide members (332) is two, and the guide members (332) are respectively arranged at both ends of the wedge-shaped pressure plate (331), one end of the guide member (332) is connected to the cabinet door (10), and the other end is connected to the wedge-shaped pressure plate (331).

3. The substation cabinet locking mechanism according to claim 2, characterized in that: The wedge-shaped pressure plate (331) includes a pressure plate body (3311) and a connecting plate (3312), the pressure plate body (3311) is in an arc shape convex outward in a direction away from the cabinet door (10), the locking plate member (32) is arranged on the top of the pressure plate body (3311), and the locking plate member (32) moves circumferentially along the pressure plate body (3311), the number of the connecting plates (3312) is two, the connecting plates (3312) are arranged in a horizontal direction, the connecting plates (3312) are respectively arranged at both ends of the pressure plate body (3311), and the connecting plates (3312) are connected to the guide member (332).

4. The substation cabinet locking mechanism according to claim 3, characterized in that: The guide member (332) includes a guide sleeve (3321) and a guide shaft (3322), one end of the guide sleeve (3321) is connected to the wedge-shaped pressure plate (331), the guide sleeve (3321) is arranged on the outer periphery of the guide shaft (3322), the end of the guide shaft (3322) away from the guide sleeve (3321) is connected to the cabinet door (10), and the guide sleeve (3321) moves back and forth in the vertical direction.

5. The substation cabinet locking mechanism according to claim 4, characterized in that: The guide member (332) further includes a pin member (3323), and both the guide sleeve (3321) and the guide shaft (3322) are provided with a clearance hole, and the pin member (3323) is inserted into the clearance hole to limit the movement of the guide sleeve (3321) in the vertical direction.

6. The substation cabinet locking mechanism according to claim 5, characterized in that: The mounting seat (334) and the elastic member (333) are both located between two adjacent guide members (332), the elastic member (333) is arranged inside the mounting seat (334), the elastic member (333) is connected to the pressure plate body (3311), and the material of the elastic member (333) is the elastic member (333).

7. The substation cabinet locking mechanism according to claim 6, characterized in that: A through hole for the door lock (31) to pass through is provided in the middle of the locking plate (32), and the locking plate (32) includes an arc-shaped pressing block (321). The number of the arc-shaped pressing blocks (321) is two, and the arc-shaped pressing blocks (321) are respectively provided at both ends of the through hole, and one end of the arc-shaped pressing block (321) is connected to the locking plate (32), and the other end is connected to the door lock (31).

8. The substation cabinet locking mechanism according to claim 7, characterized in that: The arc-shaped pressure block (321) causes the locking plate (32) to swing along the circumferential direction of the door lock (31), driving the locking plate (32) to swing on the pressure plate body (3311). The locking plate (32) adjusts the compression amount of the elastic member (333), thereby changing the pre-tightening force at one end of the locking plate (32).

9. The substation cabinet locking mechanism according to claim 1, characterized in that: A fastener (311) is provided at one end of the door lock (31) close to the locking plate (32), and the fastener (311) is used to fix the door lock (31) after the door lock (31) passes through the locking plate (32).

10. The substation cabinet locking mechanism according to claim 1, characterized in that: There are multiple locking units (30), and the multiple locking units (30) are sequentially arranged along the inner circumference of the sealing strip (20).

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