Modular power distribution cabinet of magnetic double-layer sealed cabin door structure

Abstract

The application relates to the technical field of power distribution cabinets, and discloses a modular power distribution cabinet with a magnetic double-layer sealed cabin door structure, a cabinet body, a door frame fixedly connected to the opening of the cabinet body, and a door plate rotationally connected to the door frame through a hinge; the door plate and the door frame are jointly connected with a sealing mechanism for sealing, and the sealing mechanism and the door plate are jointly connected with a locking mechanism, wherein the sealing mechanism comprises a square frame. The modular power distribution cabinet with the magnetic double-layer sealed cabin door structure can effectively solve the problems in the prior art that the power distribution cabinet in the urban medium-voltage power distribution network needs to cover outdoor environments such as roads, communities and parks, is greatly affected by the outdoor complex environment, the outdoor day-and-night and seasonal temperature differences can cause the expansion and contraction of the sealing element to generate gaps, impurities can enter the power distribution cabinet and affect the electrical components, and in winter, rain and snow can penetrate into the gaps and freeze, so that the cabinet door is not easy to open, and normal operation and maintenance are affected.

Description

Technical Field

[0001] This invention relates to the field of power distribution cabinet technology, and specifically to a modular power distribution cabinet with a magnetic double-layer sealed door structure. Background Technology

[0002] A smart grid is a new type of power system. Its core is to achieve efficient production, transmission, distribution, consumption and dispatch of electricity through "intelligent" means, to solve the shortcomings of traditional power grids in terms of flexibility, reliability, economy and environmental protection, and ultimately adapt to the development of new energy sources, diversified user needs and the construction goals of the energy internet.

[0003] As the hardware foundation for the operation of smart grids, distribution cabinets mainly play the role of power distribution and safety protection in smart grids. Since distribution cabinets in smart grids need to cover the entire link of "transmission-distribution-user side-new energy grid connection", they have more stringent special requirements in terms of function, environmental adaptability and safety protection compared with conventional distribution cabinets.

[0004] Outdoor distribution cabinets used in urban medium-voltage power distribution networks need to cover public power distribution areas such as urban roads, residential communities, and industrial parks. Due to the large temperature differences between day and night and between seasons, the rubber or silicone seals undergo periodic thermal expansion and contraction, resulting in a decrease in the sealing accuracy between the seals and the sealing surface, forming irregular gaps. Impurities such as sand particles and gaseous water vapor can enter the cabinet along these gaps, affecting the operation of electrical components such as circuit breakers, transformers, and busbars and increasing the risk of failure. In winter, when rain and snow are frequent, if there are defects or aging gaps in the cabinet door sealing strips, rainwater and snowmelt can seep into the gap between the cabinet door and the cabinet body and freeze at low temperatures. The ice layer fills the gaps and generates a forced adhesive force, making the cabinet door and the cabinet body form a rigid connection. Maintenance personnel need to apply excessive external force to open the cabinet door. In extreme cases, this can cause the cabinet door handle to deform and the hinges to break, affecting the maintenance cycle and service life of the distribution cabinet. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a modular distribution cabinet with a magnetically attached double-layer sealed door structure. This effectively solves the problems of existing technologies where distribution cabinets in urban medium-voltage power distribution networks need to cover outdoor environments such as roads, communities, and parks, and are greatly affected by complex outdoor environments. The temperature differences between day and night and between seasons can cause the seals to expand and contract, creating gaps that allow impurities to enter the distribution cabinet and affect electrical components. In winter, rain and snow can seep into the gaps and freeze, making it difficult to open the cabinet door and affecting normal operation and maintenance.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This invention provides a modular power distribution cabinet with a magnetic double-layer sealed door structure, comprising:

[0008] The cabinet has a door frame fixedly connected to its opening. The door frame is rotatably connected to the door panel via a hinge. The door panel and the door frame are connected together to a sealing mechanism that provides a sealing function. The sealing mechanism and the door panel are also connected together to a locking mechanism. The locking mechanism is located on the side of the door panel away from the hinge.

[0009] The sealing mechanism includes a square frame. Two square frames are symmetrically slidably arranged on the side of the door panel near the cabinet body via a bidirectional sliding device. A strip plate is fixed to the opposite end of each of the two square frames. A clamping component is connected to the side of each strip plate near the geometric center of the door frame. The clamping component ensures that the two square frames always tend to move away from each other. A sealing component is connected to the side of each strip plate away from the geometric center of the door frame. The sealing component is used to seal the connection between the door frame and the door panel.

[0010] Furthermore, the clamping assembly includes short rods, and short rods are uniformly fixedly connected to the strip plate along the vertical direction. Multiple short rods are slidably connected to another frame, and each short rod is fitted with a clamping spring.

[0011] Furthermore, the sealing component includes an adhesive strip made of flexible material and arranged in a rectangular shape. The two vertical sections of the adhesive strip are fixedly connected to two strip plates, and the horizontal section of the adhesive strip is slidably connected to the frame. A magnetic module is connected to the vertical section of the door frame, and a folding module is connected to the horizontal section of the adhesive strip.

[0012] Furthermore, the magnetic suction module includes vertical rods, each vertical section of the door frame is rotatably connected to a vertical rod, and a horizontal rod is rotatably connected to a horizontal section of the door frame. The intersection of the horizontal rods and the vertical rods is connected by a bevel gear set.

[0013] Furthermore, both the vertical and horizontal bars are symmetrically fixedly connected with fan-shaped magnetic strips. The magnetic properties of the two symmetrical fan-shaped magnetic strips at their far ends are opposite. The cross-section of the outer side of the vertical section of the adhesive strip matches the cross-sectional profile of the fan-shaped magnetic strip, and straight magnetic strips are uniformly fixedly connected to the vertical section of the adhesive strip.

[0014] Furthermore, the folding module includes hinge plates, with the hinge plates symmetrically fixed to the middle of the horizontal section of the rubber strip. The two hinge plates are hinged together by hinge posts, which are slidably connected to the door panel. A bone plate is rotatably connected to the hinge plates, and the bone plate is fixedly connected to the horizontal section of the rubber strip.

[0015] Furthermore, the locking mechanism includes a locking pin, which is fixedly sleeved on a vertical rod away from the hinge. The outer circumferential surface of the locking pin is evenly provided with gear teeth along the circumferential direction. A toothed block is slidably connected to the door frame, and the toothed block meshes with the gear teeth of the locking pin.

[0016] Furthermore, a handle is rotatably connected to the edge of the door panel. When the handle is in contact with the door panel, the straight-line distance between the end of the handle near the edge of the door frame and the toothed block is less than the straight-line distance between the end of the handle away from the edge of the door frame and the toothed block. A lock groove is provided on the handle, and a lock lug is fixedly connected to the door panel.

[0017] Furthermore, a trapezoidal locking block is symmetrically slidably connected to the end of the toothed block away from the cabinet. The trapezoidal locking block is connected to the toothed block by a locking spring. The inner wall of the horizontal section of the handle has symmetrical slots. The slots are L-shaped and their vertical sections are open.

[0018] The technical solution provided by this invention has the following advantages compared with the prior art:

[0019] 1. Conventional distribution cabinets often rely on a single sealing element for protection, which can easily leave gaps due to loose fit. This embodiment uses a rigid structural seal between the door frame and the square frame, along with the elastic material seal of the rubber strip, to form a double sealing structure. When the door is closed, the door panel drives the two square frames to rotate towards the door frame. The square frame closer to the hinge contacts the door frame first and slides inward. The other square frame moves in sync through a bidirectional sliding device. After the door panel and the door frame are in contact, the clamping spring of the clamping component releases its elasticity, pushing the two square frames away from each other and tightly fitting against the inner wall of the door frame, forming the first rigid seal. At the same time, the flexible rubber strip fixed to the square frame strip moves with the square frame, fully filling the tiny gap between the square frame and the door frame, forming the second flexible seal. The double seal can effectively prevent outdoor sand, water vapor, and other impurities from entering the cabinet, avoiding contamination of electrical components and causing malfunctions.

[0020] 2. Outdoor day-night and seasonal temperature differences can cause gaps in conventional electrical cabinet seals due to thermal expansion and contraction. This embodiment achieves dynamic sealing through elastic adjustment and magnetic reinforcement: when the ambient temperature changes and the flexible rubber strip expands or contracts, the continuous elastic potential energy of the retaining spring can push the frame to make a slight displacement, adapting to the size change of the rubber strip; at the same time, the magnetic module in the vertical section of the door frame plays a role. The fan-shaped magnetic strip on the vertical rod and the straight magnetic strip in the vertical section of the rubber strip are magnetically attracted, and the arc contours of the two match to achieve large-area contact, forming a uniform and continuous adsorption force, ensuring that the rubber strip is always tightly attached to the door frame and the square frame, solving the problem of sealing failure caused by temperature difference.

[0021] 3. In winter, rain and snow seep into the gaps of conventional electrical distribution cabinets and freeze, making it difficult to open the cabinet door or even damaging components. The locking mechanism of this electrical distribution cabinet can simultaneously achieve effortless opening and ice breaking. After unlocking the outer door lock, grasp the handle and rotate it. Since the distance from the handle near the door frame end to the hinge point is smaller than that at the far end, a force-saving lever is formed, reducing the external force required to open. When the handle is rotated, the connecting plate drives the toothed block to move horizontally, driving the locking pin that meshes with it to rotate. The locking pin drives the vertical rod to rotate, and then the horizontal rod rotates synchronously through the bevel gear set. The rotation of the horizontal and vertical rods not only breaks the ice structure through mechanical action, but also switches the polarity of the fan-shaped magnetic strip, so that the magnets that were originally attracted to each other and the linear magnetic strips become repulsive, pushing the rubber strip to detach from the door frame. At the same time, the repulsive force drives the square frame to separate from the door frame, ensuring that the cabinet door opens smoothly. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the separation structure according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram showing the separation structure of the door frame, sealing mechanism, and locking mechanism according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the separation structure of the sealing mechanism according to an embodiment of the present invention;

[0027] Figure 5 This is an embodiment of the present invention. Figure 3 A magnified structural diagram of part A in the middle;

[0028] Figure 6 This is a schematic diagram of the strip plate and the clamping assembly in an embodiment of the present invention;

[0029] Figure 7 This is an embodiment of the present invention. Figure 4 A magnified structural diagram of section B in the middle;

[0030] Figure 8 This is a schematic diagram of the locking mechanism according to an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the separation structure of the locking mechanism in an embodiment of the present invention.

[0032] The labels in the diagram represent: 1. Cabinet body; 2. Door frame; 3. Hinge; 4. Door panel; 5. Sealing mechanism; 51. Square frame; 52. Strip plate; 53. Clamping assembly; 531. Short rod; 532. Clamping spring; 54. Sealing assembly; 541. Adhesive strip; 542. Magnetic module; 5421. Vertical rod; 5422. Horizontal rod; 5423. Bevel gear set; 5424. Fan-shaped magnetic strip; 5425. Linear magnetic strip; 543. Folding module; 5431. Hinge plate; 5432. Hinge column; 5433. Rib plate; 6. Locking mechanism; 61. Locking column; 62. Tooth block; 63. Handle; 64. Trapezoidal block; 65. Locking spring; 66. Slot. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] The present invention will be further described below with reference to embodiments.

[0035] Example:

[0036] Please see Figure 1 - Figure 9 This invention provides a technical solution: a modular power distribution cabinet with a magnetic double-layer sealed door structure, comprising:

[0037] Cabinet 1, with a door frame 2 fixedly connected to the opening of the cabinet 1. The door frame 2 is rotatably connected to the door panel 4 via a hinge 3. The door panel 4 and the door frame 2 are connected together to a sealing mechanism 5 that serves a sealing function. The sealing mechanism 5 and the door panel 4 are also connected together to a locking mechanism 6. The locking mechanism 6 is located on the side of the door panel 4 away from the hinge 3.

[0038] The sealing mechanism 5 includes a square frame 51. Two square frames 51 are slidably arranged on the side of the door panel 4 near the cabinet 1 via a bidirectional sliding mechanism. A strip plate 52 is fixed to the opposite end of each of the two square frames 51. A clamping component 53 is connected to the side of each strip plate 52 near the geometric center of the door frame 2. The clamping component 53 enables the two square frames 51 to always tend to move away from each other. A sealing component 54 is connected to the side of each strip plate 52 away from the geometric center of the door frame 2. The sealing component 54 is used to seal the connection between the door frame 2 and the door panel 4.

[0039] The clamping component 53 includes short rods 531. Short rods 531 are uniformly fixedly connected to the strip plate 52 along the vertical direction. Multiple short rods 531 are slidably connected to another square frame 51, and each short rod 531 is fitted with a clamping spring 532.

[0040] Specifically, when the door panel 4 is in the open position around the hinge 3, the frame 51 and the clamping spring 532 are always in an elastic compression state. Under the continuous elastic force of the clamping spring 532, the two frames 51 remain in a state of mutual separation. In this state, the distance between the mutually separating ends of the two frames 51 is slightly greater than the inner width of the door frame 2, and the height of the frame 51 is slightly less than the inner height of the door frame 2.

[0041] The preferred bidirectional sliding device is a rack and pinion bidirectional reciprocating mechanism. When closing the door, as the door panel 4 rotates towards the door frame 2, the square frame 51 closest to the hinge 3 first contacts the vertical section of the door frame 2 and slides away from the hinge 3 under the obstruction of the door frame 2. This causes the other square frame 51 to move closer to it via the bidirectional sliding device. When the door panel 4 and the door frame 2 are fully fitted, both square frames 51 fall completely into the inner area of ​​the door frame 2. At this time, under the synchronous elastic force of multiple clamping springs 532, the outer walls of the two square frames 51 and the inner walls of the door frame 2 form a continuous, uniform, and tight fit. On the one hand, the structural fit between the square frame 51 and the door frame 2, combined with the sealing effect of the sealing component 54, forms a double sealing barrier, which can significantly improve the dustproof, waterproof, and foreign object intrusion prevention level of the power distribution cabinet, making it suitable for complex outdoor environments. On the other hand, the uniform force on the fitting surface caused by the symmetrical structure can avoid the wear of the sealing components caused by excessive local pressure, ensuring the stability of the sealing effect and indirectly extending the replacement cycle of the sealing component 54, thus reducing maintenance costs.

[0042] The sealing component 54 includes an adhesive strip 541, which is made of flexible material and is rectangular in shape. The two vertical sections of the adhesive strip 541 are fixed to two strip plates 52 respectively, and the horizontal section of the adhesive strip 541 is slidably connected to the frame 51. A magnetic module 542 is connected to the vertical section of the door frame 2, and a folding module 543 is connected to the horizontal section of the adhesive strip 541.

[0043] Specifically, when the outer walls of the two square frames 51 are pressed against the inner wall of the door frame 2 under the continuous elastic force of the clamping spring 532, as the square frames 51 move away from each other, the square frames 51 simultaneously push the adhesive strip 541 to form a tight contact with the inner wall of the door frame 2. On the one hand, the flexible adhesive strip 541 can fully fill the tiny gap between the door frame 2 and the square frames 51, forming a double sealing effect of structural sealing between the door frame 2 and the square frames 51 and material sealing of the adhesive strip 541, significantly improving the dustproof and waterproof rating of the distribution cabinet. On the other hand, the continuous elastic force of the clamping spring 532 is applied to the square frames 51, providing stable and uniform bonding pressure for the adhesive strip 541, avoiding loosening of the seal due to insufficient bonding force, ensuring the long-term sealing effect of the connection, and meeting the needs of long-term use.

[0044] When encountering extreme environments that cause drastic changes in external temperature, leading to thermal expansion or contraction of the sealing strip 541, the magnetic module 542 on the vertical section of the door frame 2 comes into play. Through magnetic attraction, the outer side of the sealing strip 541 is kept in contact with the square frame 51. At the same time, the square frame 51 can make slight displacement under the elastic action of the clamping spring 532, adapting to the dimensional changes caused by thermal expansion and contraction of the sealing strip 541. This ensures that the sealing strip 541 always maintains effective contact with the door frame 2 and the square frame 51, thereby achieving dynamic sealing, preventing sealing failure caused by temperature differences, and improving the adaptability of the distribution cabinet in extreme environments such as high and low temperatures.

[0045] The function of the folding module 543 on the horizontal section of the rubber strip 541 is to enable the horizontal section of the rubber strip 541 to adaptively generate slight bends, absorb the displacement caused by the relative movement of the two square frames 51 when entering the door frame 2, prevent the rubber strip 541 from being stretched, deformed or broken due to the displacement of the square frames 51, extend the service life of the rubber strip 541, and reduce maintenance and replacement costs. After the two square frames 51 are fully inserted into the door frame 2, the horizontal section of the rubber strip 541 returns to its natural state, sealing the upper and lower ends of the inner wall of the door frame 2.

[0046] The magnetic module 542 includes a vertical rod 5421. Each vertical section of the door frame 2 is rotatably connected to a vertical rod 5421. A horizontal rod 5422 is rotatably connected to a horizontal section of the door frame 2. The intersection of the horizontal rod 5422 and the vertical rod 5421 is connected by a bevel gear set 5423.

[0047] The vertical rod 5421 and the horizontal rod 5422 are respectively symmetrically fixedly connected with fan-shaped magnetic strips 5424. The magnetic properties of the two symmetrical fan-shaped magnetic strips 5424 at their far ends are opposite. The cross-section of the outer side of the adhesive strip 541 matches the cross-sectional profile of the fan-shaped magnetic strip 5424. A straight magnetic strip 5425 is fixedly connected to the outer side of the adhesive strip 541.

[0048] The folding module 543 includes a hinge plate 5431. The hinge plate 5431 is symmetrically fixed to the middle of the horizontal section of the adhesive strip 541. The two hinge plates 5431 are hinged by a hinge post 5432. The hinge post 5432 is slidably connected to the door panel 4. A bone plate 5433 is rotatably connected to the hinge plate 5431. The bone plate 5433 is fixedly connected to the horizontal section of the adhesive strip 541 to prevent the folding position of the adhesive strip 541 from changing.

[0049] Specifically, before entering the door frame 2, the two square frames 51 are kept in an initial state of being far apart from each other under the elastic force of the spring 532. During the process of closing the door panel 4, the two square frames 51 will contact the door frame 2 in a preset order. After contact, under the mechanical blocking action of the door frame 2, they will move smoothly in the direction of approaching each other, ensuring that the two square frames 51 can enter the door frame 2 in a smooth and unobstructed state, avoiding the occurrence of jamming.

[0050] As the two square frames 51 move closer to each other in sync, the two hinge plates 5431 connected to the horizontal section of the adhesive strip 541 fold accordingly. The angle between them on the side away from the geometric center of the door frame 2 gradually decreases. Through this folding deformation, the middle part of the adhesive strip 541 can flexibly adapt to the dynamic changes in the relative position of the door frame 2.

[0051] When the two square frames 51 are fully inserted into the door frame 2, the retaining spring 532 will release the stored elastic potential energy, pushing the two square frames 51 to move away from each other until the vertical section of the adhesive strip 541 is tightly pressed against the door frame 2. At this time, the fan-shaped magnetic strips 5424 on the horizontal bar 5422 and the vertical bar 5421 near the straight magnetic strip 5425 have opposite magnetic properties to the outer side of the straight magnetic strip 5425 and are in a magnetic attraction state. With the help of the magnetic attraction between the fan-shaped magnetic strip 5424 and the straight magnetic strip 5425, the sealing surface on the outer side of the adhesive strip 541 forms a stable and reliable fit.

[0052] The fan-shaped magnetic strips 5424, which are uniformly fixed on the vertical rod 5421 near the geometric center of the door frame 2, form a contour matching relationship with the arc-shaped cross section on the outer side of the vertical section of the adhesive strip 541. The straight magnetic strips 5425 on the outer side of the adhesive strip 541 magnetically attract the fan-shaped magnetic strips 5424. The arc-shaped contour design maximizes the contact area between the fan-shaped magnetic strips 5424 and the straight magnetic strips 5425, avoiding uneven adsorption force caused by point contact. The combination of the uniformly distributed magnets and the straight magnetic strips 5425 can form a continuous and balanced magnetic attraction force on the vertical section of the adhesive strip 541, thereby achieving a complete seal on the upper and lower gaps on the inner side of the door frame 2, and ultimately forming an all-round, dead-angle-free sealing effect.

[0053] A handle 63 is rotatably connected to the edge of the door panel 4. When the handle 63 is in contact with the door panel 4, the straight distance between the end of the handle 63 near the edge of the door frame 2 and the toothed block 62 is less than the straight distance between the end of the handle 63 away from the edge of the door frame 2 and the toothed block 62. A lock groove is provided on the handle 63, and a lock lug is fixedly connected to the door panel 4.

[0054] The locking mechanism 6 includes a locking pin 61, which is fixedly sleeved on a vertical rod 5421 away from the hinge 3. The outer circumferential surface of the locking pin 61 is uniformly provided with gear teeth along the circumferential direction. A toothed block 62 is slidably connected to the door frame 2, and the toothed block 62 meshes with the gear teeth of the locking pin 61.

[0055] Specifically, during the closing process of door panel 4, handle 63 remains in close contact with door frame 2, the lock lugs are precisely inserted into the lock groove, and initial locking is achieved through the external door lock, providing basic constraints for closing door panel 4. During this process, the inclined surface of trapezoidal block 64 contacts handle 63 first. Under the mechanical blocking action of handle 63, the block automatically retracts inward against the elastic force of locking spring 65, avoiding structural interference. When door panel 4 and door frame 2 are fully in contact, the block pops out under the restoring force of locking spring 65 and precisely engages with the horizontal section of L-shaped slot 66, realizing automatic locking of door panel 4, door frame 2 and handle 63. This design can complete multiple fixation without additional operation, significantly improving the convenience of the locking process and the stability of the structural connection.

[0056] In extreme rain and snow weather, if moisture gets trapped between the door panel 4 and the door frame 2 or on the exposed side of the rubber strip 541 and freezes in low temperatures, forming a frozen layer that prevents the door panel 4 from opening, the maintenance personnel should proceed as follows to open the door panel 4: First, unlock and remove the outer door lock on the lock lug to release the initial constraint; then, grasp the handle 63 and rotate it. Since the straight-line distance between the end of the handle 63 near the edge of the door frame 2 and the toothed block 62 is smaller than the straight-line distance between the end of the handle 63 away from the edge of the door frame 2 and the toothed block 62, a force-saving lever structure is formed, which can effectively reduce the force required to open and improve the ease of operation.

[0057] In the first half of the rotation of handle 63, trapezoidal block 64 slides along the vertical section of L-shaped slot 66. Through the connection between the block and toothed block 62, it drives toothed block 62 to move away from cabinet 1, thereby driving the locking pin 61 that meshes with it to rotate. Since the locking pin 61 is fixedly sleeved on the vertical rod 5421, it drives the vertical rod 5421 to rotate synchronously. Then, through the transmission action of bevel gear set 5423, it causes the horizontal rod 5422 and another vertical rod 5421 to rotate synchronously.

[0058] During the rotation of the horizontal bar 5422 and the vertical bar 5421, on the one hand, the mechanical force generated by the relative movement between them and the rubber strip 541 directly destroys the structural integrity of the icing area and breaks down the freezing constraint; on the other hand, by rotating and switching the relative position of the fan-shaped magnetic strip 5424, the fan-shaped magnetic strip 5424 that was originally attracted to the linear magnetic strip 5425 is switched to a fan-shaped magnetic strip 5424 with the same magnetism aligned with the linear magnetic strip 5425. The magnetic repulsion generated between the two pushes the rubber strip 541 and the fan-shaped magnetic strip 5424 to quickly separate.

[0059] When the handle 63 is rotated at a certain angle, the locking block moves to the opening of the slot 66 and disengages from it, thereby unlocking the handle 63 and the toothed block 62, thus unlocking the door panel 4 and the door frame 2. Since the magnetic repulsion between the fan-shaped magnetic strip 5424 and the linear magnetic strip 5425 is greater than the elastic force of the clamping spring 532, it will drive the two square frames 51 to move in the same direction and disengage from the door frame 2, so that the entire structure can smoothly disengage from the door frame 2, ensuring that it can still be reliably opened under extreme icing conditions, thus adapting to complex outdoor environments.

[0060] It is worth noting that the modular power distribution cabinet with the aforementioned magnetic double-layer sealed door structure also has the following advantages:

[0061] Advantage 1: Conventional distribution cabinets often rely on a single sealing element for protection, which can easily leave gaps due to loose fit. This embodiment uses a rigid structural seal between the door frame 2 and the square frame 51, along with the elastic material seal of the rubber strip 541, to form a double sealing structure. When the door is closed, the door panel 4 drives the two square frames 51 to rotate toward the door frame 2. The square frame 51 closer to the hinge 3 first contacts the door frame 2 and slides inward. The other square frame 51 moves closer simultaneously through a bidirectional sliding device. After the door panel 4 and the door frame 2 are in contact, the clamping spring 532 of the clamping component 53 releases its elasticity, pushing the two square frames 51 away from each other and tightly fitting the inner wall of the door frame 2, forming the first rigid seal. At the same time, the flexible rubber strip 541, which is fixed to the strip plate 52 of the square frame 51, moves with the square frame 51, fully filling the tiny gap between the square frame 51 and the door frame 2, forming the second flexible seal. The double seal can effectively prevent outdoor sand, water vapor, and other impurities from entering the cabinet 1, avoiding contamination of electrical components and causing malfunctions.

[0062] Advantage 2: Outdoor day-night and seasonal temperature differences can cause gaps in conventional electrical cabinet seals due to thermal expansion and contraction. However, this embodiment achieves dynamic sealing through elastic adjustment and magnetic reinforcement: When the ambient temperature changes and causes the flexible adhesive strip 541 to expand or contract, the continuous elastic potential energy of the clamping spring 532 can push the square frame 51 to make a slight displacement, adapting to the size change of the adhesive strip 541; at the same time, the magnetic module 542 in the vertical section of the door frame 2 plays a role. The fan-shaped magnetic strip 5424 on the vertical rod 5421 and the straight magnetic strip 5425 in the vertical section of the adhesive strip 541 are magnetically attracted, and their arc contours match to achieve large-area contact, forming a uniform and continuous adsorption force, ensuring that the adhesive strip 541 is always tightly attached to the door frame 2 and the square frame 51, solving the problem of sealing failure caused by temperature difference.

[0063] Advantage 3: The folding module 543 in this embodiment can achieve flexible buffering of the adhesive strip 541. The middle of the horizontal section of the adhesive strip 541 is hinged to two hinge plates 5431 through the hinge post 5432, and the hinge post 5432 is slidably connected to the door panel 4. During the closing process, the two square frames 51 approach each other under the obstruction of the door frame 2, causing the hinge plate 5431 of the horizontal section of the adhesive strip 541 to fold and retract. The hinge post 5432 slides along the door panel 4. The folding action absorbs the displacement caused by the relative movement of the square frames 51, avoiding the adhesive strip 541 being pulled hard. When the square frame 51 is completely inserted into the door frame 2 and reset under the action of the spring, the hinge plate 5431 unfolds, the horizontal section of the adhesive strip 541 returns to its natural state and fits the door frame 2, thereby reducing the mechanical wear of the adhesive strip 541 and extending its service life.

[0064] Fourthly, in winter, rain and snow seep into the gaps of conventional power distribution cabinets and freeze, easily causing the cabinet door to be difficult to open or even damage components. The locking mechanism 6 of this power distribution cabinet can simultaneously achieve effortless opening and ice breaking. After unlocking the outer door lock, hold the handle 63 and rotate it. The connecting plate drives the toothed block 62 to move horizontally, driving the locking pin 61 that meshes with it to rotate. The locking pin 61 drives the vertical rod 5421 to rotate, and then through the bevel gear set 5423, the horizontal rod 5422 rotates synchronously. The rotation of the horizontal rod 5422 and the vertical rod 5421 not only breaks the ice structure through mechanical action, but also switches the polarity of the fan-shaped magnetic strip 5424, so that the fan-shaped magnetic strip 5424 and the linear magnetic strip 5425, which were originally attracted, become repulsive. This pushes the rubber strip 541 to detach from the door frame 2 from the freeze. At the same time, the repulsive force drives the square frame 51 to separate from the door frame 2, ensuring that the door panel 4 opens smoothly.

[0065] Fifthly, conventional power distribution cabinets often require multiple steps to lock and are prone to loosening due to vibration. This power distribution cabinet achieves automatic locking through the locking mechanism 6. When the door is closed, the lock lugs automatically insert into the locking groove of the handle 63. At the same time, the trapezoidal block 64, under the action of the locking spring 65, overcomes the initial resistance and springs into the horizontal section of the L-shaped slot 66, simultaneously completing the automatic locking of the door panel 4, door frame 2, and handle 63. Afterward, only external door lock reinforcement is required. This process does not require additional manual alignment or tightening, simplifying the operation process. Moreover, the multiple locking structure can withstand outdoor vibration, avoid sealing gaps caused by loose cabinet doors, and ensure stable sealing performance.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A modular power distribution cabinet with a magnetic double-layer sealed door structure, characterized in that, include: Cabinet (1), with a door frame (2) fixedly connected to the opening of the cabinet (1). The door frame (2) is rotatably connected to the door panel (4) via a hinge (3). The door panel (4) and the door frame (2) are connected together to a sealing mechanism (5) that serves to seal. The sealing mechanism (5) and the door panel (4) are connected together to a locking mechanism (6). The locking mechanism (6) is located on the side of the door panel (4) away from the hinge (3). The sealing mechanism (5) includes a square frame (51). Two square frames (51) are symmetrically slidably arranged on the side of the door panel (4) near the cabinet (1) via a bidirectional sliding device. A strip plate (52) is fixed to the opposite end of each of the two square frames (51). A clamping component (53) is connected to the side of each strip plate (52) near the geometric center of the door frame (2). The clamping component (53) enables the two square frames (51) to always tend to move away from each other. A sealing component (54) is connected to the side of each strip plate (52) away from the geometric center of the door frame (2). The sealing component (54) is used to achieve the sealing at the connection between the door frame (2) and the door panel (4). The clamping component (53) includes short rods (531). Short rods (531) are uniformly fixedly connected to the strip plate (52) along the vertical direction. Multiple short rods (531) are slidably connected to one of the square frames (51), and each short rod (531) is fitted with a clamping spring (532). The enclosure component (54) includes an adhesive strip (541), which is made of flexible material and is arranged around the outside of the square frame (51). The two vertical sections of the adhesive strip (541) are fixed to two strip plates (52) respectively, and the horizontal section of the adhesive strip (541) is slidably connected to the square frame (51). A magnetic module (542) is connected to the vertical section of the door frame (2), and a folding module (543) is connected to the horizontal section of the adhesive strip (541). A straight magnetic strip (5425) that is magnetically attracted to the magnetic module (542) is evenly fixedly connected to the vertical section of the adhesive strip (541). Among them, the bidirectional sliding device is a gear rack bidirectional reciprocating device. When the door is closed, as the door panel (4) rotates towards the door frame (2), the square frame (51) close to the hinge (3) first contacts the vertical section of the door frame (2), and slides away from the hinge (3) under the blocking action of the door frame (2). Thus, the bidirectional sliding device drives another square frame (51) to approach it. When the door panel (4) and the door frame (2) are fully fitted, the two square frames (51) fall completely into the inner area of ​​the door frame (2). At this time, under the synchronous elastic force of multiple clamping springs (532), the outer walls of the two square frames (51) and the inner walls of the door frame (2) form a tight fit. When the outer walls of the two square frames (51) are pressed against the inner wall of the door frame (2) under the continuous elastic force of the clamping spring (532), the square frames (51) push the rubber strip (541) to form a tight contact with the inner wall of the door frame (2) as the square frames (51) move away from each other.

2. The modular power distribution cabinet with a magnetic double-layer sealed door structure according to claim 1, characterized in that: The magnetic module (542) includes a vertical rod (5421). Each vertical section of the door frame (2) is rotatably connected to a vertical rod (5421). A horizontal rod (5422) is rotatably connected to a horizontal section of the door frame (2). The intersection of the horizontal rod (5422) and the vertical rod (5421) is connected by a bevel gear set (5423).

3. The modular power distribution cabinet with a magnetic double-layer sealed door structure according to claim 2, characterized in that: Both the vertical rod (5421) and the horizontal rod (5422) are symmetrically fixed with fan-shaped magnetic strips (5424). The magnetic properties of the two symmetrical fan-shaped magnetic strips (5424) at their far ends are opposite. The cross-section of the outer side of the rubber strip (541) matches the cross-sectional profile of the fan-shaped magnetic strip (5424).

4. The modular power distribution cabinet with a magnetic double-layer sealed door structure according to claim 1, characterized in that: The folding module (543) includes a hinge plate (5431), and the hinge plate (5431) is symmetrically fixed to the middle of the horizontal section of the rubber strip (541). The two hinge plates (5431) are hinged by a hinge post (5432). The hinge post (5432) is slidably connected to the door panel (4). A bone plate (5433) is rotatably connected to the hinge plate (5431). The bone plate (5433) is fixedly connected to the horizontal section of the rubber strip (541).

5. A modular power distribution cabinet with a magnetic double-layer sealed door structure according to claim 2, characterized in that: The locking mechanism (6) includes a locking pin (61), which is fixedly sleeved on a vertical rod (5421) away from the hinge (3). The outer circumferential surface of the locking pin (61) is uniformly provided with gear teeth along the circumferential direction. A toothed block (62) is slidably connected on the door frame (2), and the toothed block (62) meshes with the gear teeth of the locking pin (61).

6. A modular power distribution cabinet with a magnetic double-layer sealed door structure according to claim 5, characterized in that: A handle (63) is rotatably connected to the edge of the door panel (4). When the handle (63) is in contact with the door panel (4), the straight distance between the end of the handle (63) near the edge of the door frame (2) and the tooth block (62) is less than the straight distance between the end of the handle (63) away from the edge of the door frame (2) and the tooth block (62). A lock groove is provided on the handle (63), and a lock lug is fixedly connected to the door panel (4).

7. A modular power distribution cabinet with a magnetic double-layer sealed door structure according to claim 5, characterized in that: The toothed block (62) is symmetrically connected to a trapezoidal card block (64) at one end away from the cabinet (1). The trapezoidal card block (64) is connected to the toothed block (62) by a locking spring (65). The inner wall of the horizontal section of the handle (63) is symmetrically provided with slots (66). The slots (66) are L-shaped and their vertical sections are designed with an opening.

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