Intelligent high-protection low-voltage control box

Abstract

This application relates to the field of power equipment technology, specifically to an intelligent high-protection low-voltage control box, including a box body, an outer door panel, and an inner door panel. The box body has a door frame, the inner door panel is hinged to the inner side of the door frame, and the outer door panel is hinged to the outer side of the door frame. The outer door panel is provided with a door lock assembly to lock the outer door panel to the door frame. The inner side of the outer door panel has at least one ring of foam strip corresponding to the door frame for sealing the outer door panel and the box body. The door lock assembly passes through the outer door panel, and a sealing structure is provided between the two. The box body contains an intelligent monitoring and protection module for protecting and controlling power equipment. The box body is provided with a connector assembly for connecting and disconnecting cables. This application solves the problems of low protection level and poor sealing performance of existing intelligent low-voltage control boxes.

Description

Technical Field

[0001] This application relates to the field of power equipment technology, and in particular to an intelligent high-protection low-voltage control box. Background Technology

[0002] Currently, the power industry requires critical low-voltage control boxes to have an IP55 protection rating. The mainstream manufacturing methods for intelligent, high-protection low-voltage control boxes from equipment manufacturers fall into two main categories: assembly and welding. Both methods achieve the fundamental goal of housing intelligent electrical control components within a complete enclosure; and enabling the operation of primary high-voltage equipment by outputting commands from the control box's components.

[0003] However, due to limitations in structural design, conventional assembled low-voltage control boxes have drawbacks such as complicated process flow and protection, large amount of post-assembly work, low protection level, and inability to achieve completely seamless overlap between panels, resulting in poor sealing.

[0004] Welded low-voltage control boxes undergo welding and grinding followed by spray painting. While the box itself offers high protection, the related accessories are not commensurate with the protection level, thus failing to meet the technical requirements. Examples include the fit between the door panel and the box, the installation protection of the door hinges, the protection of the door lock, and the protection of the inlet and outlet interfaces of the box. Summary of the Invention

[0005] To address the issues of low protection levels and poor sealing in existing low-voltage control boxes, this application provides an intelligent high-protection low-voltage control box.

[0006] The intelligent high-protection low-voltage control box provided in this application adopts the following technical solution: An intelligent high-protection low-voltage control box includes a box body, an outer door panel, and an inner door panel. The box body has a door frame. The inner door panel is hinged to the inner side of the door frame, and the outer door panel is hinged to the outer side of the door frame. The outer door panel is provided with a door lock assembly to lock the outer door panel to the door frame. The inner side of the outer door panel is provided with at least one ring of foam strip corresponding to the door frame to seal the outer door panel and the box body. The door lock assembly passes through the outer door panel, and a sealing structure is provided between the two. The box body is equipped with an intelligent monitoring and protection module for protecting and controlling power equipment. The box body is provided with a connector assembly for connecting and disconnecting cables.

[0007] By adopting the above technical solutions, the foam strips enhance the sealing and waterproofing between the outer door panel and the enclosure. The door lock assembly on the outer door panel has a sealing structure, improving the enclosure's sealing protection level. The connector assembly provides interface protection for the enclosure's incoming and outgoing lines. With inner and outer doors, all components are located inside the enclosure and on the inner door, thus being protected by the enclosure and the outer door, which greatly improves the overall protection level of the low-voltage control box. In addition, the inner door panel can be used to install some electrical components, and opening the inner door panel facilitates maintenance.

[0008] Preferably, the outer door panel is connected to the door frame via a hinge assembly. The hinge assembly includes a hinge seat, a movable hinge, and a hinge pin. The hinge seat is fixed to the housing and a hinge sealing gasket is provided between the two. The hinge pin is rotatably mounted on the hinge seat. The movable hinge passes through the hinge pin. The outer door panel is connected to the movable hinge.

[0009] By adopting the above technical solution, a hinge sealing gasket is set at the connection between the hinge seat and the cabinet to effectively seal the mounting bolt holes, prevent moisture and dust from entering from the hinge installation part, and ensure that the hinge structure will not cause a reduction in the protection level of the cabinet.

[0010] Preferably, the door lock assembly includes a handle, a lock cylinder, a lock sleeve, and a lock sleeve nut. One end of the handle has an eccentric wheel portion. One end of the lock sleeve has a limiting head, and the other end has a threaded portion. The lock sleeve passes through a mounting hole in the outer door panel. The limiting head abuts against the outer door panel, and a first sealing gasket is provided between the two. The lock sleeve nut passes through the threaded portion, and the two are threadedly engaged. The lock cylinder is located inside the lock sleeve. One end of the lock cylinder passes through the outer door panel and the limiting head in sequence and is hinged to the eccentric wheel portion of the handle. The other end of the lock cylinder extends out of the lock sleeve, and the extended end has a lock hook for hooking the door frame. The portion of the lock cylinder located inside the lock sleeve has a shoulder portion. The limiting head has a blocking portion that can abut against the shoulder portion. A spring is provided between the shoulder portion and the blocking portion. The first sealing gasket constitutes the sealing structure.

[0011] By adopting the above technical solution, the locking and unlocking of the outer door panel is achieved through the eccentric structure of the handle and the locking hook. The first sealing gasket seals and protects the perforations of the door lock assembly on the outer door panel, thereby improving the protection level of the enclosure.

[0012] Preferably, the portion of the lock cylinder that contacts the lock sleeve is provided with a sealing ring.

[0013] By adopting the above technical solution, since there is a through hole when the lock cylinder passes through the limiting head of the lock sleeve, the sealing ring of the contact part between the lock cylinder and the lock sleeve seals the through hole.

[0014] Preferably, a second sealing gasket is provided between the locking nut and the inner side of the outer door panel.

[0015] By adopting the above technical solution, the second sealing gasket and the first sealing gasket provide sealing protection for both the inner and outer sides of the mounting hole of the outer door panel, greatly improving the protection effect.

[0016] Preferably, the housing is provided with a first hook assembly and a second hook assembly. The first hook assembly includes a first hook rod, which is rotatably disposed within the housing. The inner side of the outer door panel is provided with a first locking block, which has a first hook hole. The end of the first hook rod away from the housing is used to hook into the first hook hole to limit the rotation of the outer door panel. The second hook assembly includes a second hook rod and a height-adjusting frame. The height-adjusting frame is fixed within the housing. The second hook rod is rotatably disposed on the height-adjusting frame. The inner side of the inner door panel is provided with a second locking block, which has a second hook hole. The end of the second hook rod away from the height-adjusting frame is used to hook into the second hook hole to limit the rotation of the inner door panel.

[0017] By adopting the above technical solution, the first wind hook assembly is used to support the opened outer door panel, and the second wind hook assembly is used to support the opened inner door panel, thereby limiting the rotation of the opened outer door panel and inner door panel and maintaining the stability of the inner and outer door panels.

[0018] Preferably, the enclosure has a protruding protective frame at the door frame, and the outer door panel covers the protective frame.

[0019] By adopting the above technical solution, the protective frame has the advantages of high strength and good sealing performance. The protective frame can locally strengthen the strength of the door frame connection without increasing the strength of the entire box, thus reasonably improving the protection level of the box. The protective frame is formed by bending high-strength steel plate. Its outward convex structure not only enhances the overall rigidity and impact resistance of the door frame area, but also significantly improves the sealing performance by pressing the foam strip with the outer door panel. The local reinforcement design avoids the increase of the overall box material, which is economical and effective.

[0020] Preferably, the outer door panel is provided with a glass observation window.

[0021] By adopting the above technical solution, the glass observation window can be used to observe the operating status of components on the inner door panel. The glass observation window is made of high-strength tempered glass and is fixed to the door panel opening with sealing strips around it, which facilitates real-time observation of the working status of indicator lights, instruments or display devices inside the box without opening the outer door, which is both convenient and does not damage the sealed environment inside the box.

[0022] Preferably, the aviation connector assembly includes multiple aviation connectors, which are respectively located at the top and bottom of the housing. Each aviation connector has a waterproof sealing ring at its interface with the housing and is sealed by threaded fasteners to achieve a high level of protection for cable entry and exit.

[0023] By adopting the above technical solutions, the aviation connector components are designed in a standardized manner, making installation and maintenance convenient. The multi-layer sealing structure at the interface ensures that no water leakage will occur even in heavy rain or scouring environments, meeting the requirements of IP55 and above protection levels.

[0024] Preferably, the hinge sealing gasket is made of rubber, its shape matches the bottom surface of the hinge seat, and it has through holes corresponding to the mounting bolts. After installation, it deforms under pressure to fill the gap, effectively preventing moisture and dust from entering from the hinge installation point.

[0025] By adopting the above technical solution, the hinge sealing gasket is made of weather-resistant rubber, which has good elasticity and long service life. After installation, it fits tightly against the surface of the box and the hinge seat, eliminating installation gaps and providing a long-lasting and effective sealing guarantee.

[0026] In summary, this application includes at least one of the following beneficial technical effects: Foamed strips enhance the sealing and waterproofing between the outer door panel and the enclosure. The door lock assembly on the outer door panel has a sealing structure, improving the enclosure's sealing protection level. The connector assembly provides interface protection for the enclosure's incoming and outgoing lines. With inner and outer doors, all components are located inside the enclosure and on the inner door, and are protected by the enclosure and outer door, thus greatly improving the overall protection level of the low-voltage control box.

[0027] Both the door lock and hinge components employ a sealed structure, ensuring that the enclosure's protection level is not reduced due to the arrangement of the components.

[0028] The door lock assembly adopts an eccentric wheel and lock hook linkage structure, which makes operation effortless and locking reliable. At the same time, it forms a triple sealing protection through the first sealing gasket, sealing ring and second sealing gasket, completely eliminating the risk of leakage at the door lock mounting hole.

[0029] The hinge assembly is equipped with a special sealing gasket to ensure that the rotating parts maintain a high level of sealing even after long-term use, thus avoiding becoming a weak point in the protection.

[0030] The enclosure door frame is equipped with an outwardly protruding protective frame, which not only enhances the structural strength but also optimizes the sealing surface design, further improving the protection level. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the intelligent high-protection low-voltage control box according to an embodiment of this application.

[0032] Figure 2 yes Figure 1 The main view.

[0033] Figure 3 yes Figure 1 A bottom view.

[0034] Figure 4 yes Figure 1 The right view.

[0035] Figure 5 This is a structural schematic diagram of the outer door panel in an embodiment of this application.

[0036] Figure 6 yes Figure 5 AA view.

[0037] Figure 7 yes Figure 5 BB view.

[0038] Figure 8 This is a schematic diagram of the door lock assembly in an embodiment of this application.

[0039] Figure 9 This is a schematic diagram of the locked state of the door lock assembly in an embodiment of this application.

[0040] Figure 10 This is a schematic diagram of the unlocked state of the door lock component in an embodiment of this application.

[0041] Figure 11 This is a three-dimensional structural diagram of the hinge assembly in an embodiment of this application.

[0042] Figure 12 This is a schematic diagram of the front view structure of the hinge assembly in an embodiment of this application.

[0043] Figure 13 This is a cross-sectional view of the hinge assembly in an embodiment of this application.

[0044] Explanation of reference numerals in the attached drawings: 1. Box body; 11. Door frame; 12. Protective frame; 2. Outer door panel; 21. Foam strip; 22. First locking block; 3. Inner door panel; 31. Second locking block; 4. Door lock assembly; 41. Handle; 411. Eccentric wheel; 42. Lock cylinder; 421. Lock hook; 422. Shoulder; 43. Lock sleeve; 431. Limiting head; 432. Blocking part; 44. Lock sleeve nut; 45. First seal 46. ​​Gasket; 47. Spring; 48. Sealing ring; 49. Second sealing gasket; 5. Airplane plug assembly; 60. Hinge assembly; 61. Hinge seat; 62. Moving hinge; 63. Hinge pin; 64. Hinge sealing gasket one; 65. Step hole one; 66. Step hole two; 67. Hinge sealing gasket two; 7. First wind hook assembly; 71. First hook rod; 82. Second wind hook assembly; 83. Second hook rod; 84. Raising frame; 9. Manual screw. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-13 This application will be described in further detail.

[0046] The directional terms such as "up," "down," "left," "right," "front," and "back" used in this application only represent relative positions in the diagram and are used for the convenience of describing this application. They do not represent the absolute position of the product and should not be regarded as limitations on this application.

[0047] This application discloses an intelligent high-protection low-pressure control box.

[0048] like Figures 1 to 4 As shown, the intelligent high-protection low-voltage control box of this embodiment mainly includes a box body 1, an outer door panel 2, and an inner door panel 3. The box body 1 has an entrance, at which a door frame 11 is provided. The inner door panel 3 is hinged to the inner side of the door frame 11, and the outer door panel 2 is hinged to the outer side of the door frame 11. The inner door panel 3 and the outer door panel 2 are hinged on the same side, which facilitates opening. The hinge point of the inner door panel 3 is on the inner side of the door frame 11, but its door still opens outward. The outer door panel 2 is provided with a door lock assembly 4 to lock the outer door panel 2 to the door frame 11. The inner side of the outer door panel 2 is provided with at least one ring of foam strip 21 corresponding to the door frame 11. Figures 5 to 7 As shown, a layer of foam adhesive is applied. When the outer door panel 2 is closed, the door lock assembly 4 locks the outer door panel 2 to the housing 1, thereby clamping the foam strip 21 to achieve sealing and protection between the outer door panel 2 and the housing 1. The door lock assembly 4 is installed on the outer door panel 2; therefore, a sealing structure is required between the two to seal the door lock assembly 4.

[0049] The enclosure 1 is equipped with aviation connector assemblies 5 for cable insertion and exit. The aviation connector assemblies 5 provide interface protection for the cable entry and exit points of the enclosure. Multiple aviation connector assemblies 5 can be installed as needed, located at the bottom and top of the enclosure 1. Each aviation connector has a waterproof sealing ring at its interface with the enclosure, and is tightened and sealed with threaded fasteners, achieving a high level of protection for cable entry and exit connections.

[0050] The interior of enclosure 1 houses a component mounting plate for installing electrical components such as circuit terminals and circuit breakers. The inner door panel 3 can be fitted with various light switches, buttons, microprocessor-based protection devices, etc., according to project needs. When the internal space of enclosure 1 is limited, maintenance can be inconvenient. In this case, opening the inner door panel 3 allows access to the outside of enclosure 1 for inspection. Enclosure 1 contains an intelligent monitoring and protection module for the protection and control of electrical equipment. The electrical equipment, which is the object of monitoring, control, and protection by the intelligent low-voltage control box, is primary electrical equipment outside the control box, such as 10kV high-voltage circuit breakers, 10kV high-voltage load switches, or pole-mounted circuit breakers. The protection and control module is an integrated intelligent control system. Sensors installed on the electrical equipment (such as current transformers, voltage transformers, temperature and humidity sensors, smoke sensors, etc.) collect information, and the signals are transmitted to the protection and control module via a signal cable or electrical cable. The processor in the module analyzes the data, compares it with preset values, makes logical judgments, and issues corresponding commands. For example, if a short-circuit fault occurs in a circuit breaker, the current transformer detects the abnormal current and transmits a signal to the protection module. After judgment, the protection module issues a trip command to the circuit breaker mechanism, thus tripping the circuit and disconnecting the faulty power circuit. Protection and control modules, depending on their functions, may include microprocessors, sensors, communication modules, and human-machine interfaces. Different protection modules have different programs and protection functions. However, almost all similar modules require high levels of protection to prevent corrosion from foreign objects or harmful moisture.

[0051] In this embodiment, the enclosure 1 is assembled and welded from thin steel plates after bending. Specifically, two or three adjacent sides of the enclosure 1 are formed as a single unit. Several panels are combined and welded together to form the enclosure 1. A door frame 11 is located at the front of the enclosure 1. The door frame 11 has a protruding protective frame 12, and the outer door panel 2 covers the protective frame 12. The door frame edge is also protected, providing high strength and good sealing, thus ensuring the required level of protection.

[0052] like Figures 11 to 13As shown, in this embodiment, the outer door panel 2 is connected to the door frame 11 via a hinge assembly 6. The hinge assembly 6 includes a hinge seat 61, a movable hinge 62, and a hinge pin 63. The hinge seat 61 is fixed to the housing 1 by bolts. Since the presence of bolt holes increases gaps, a hinge sealing gasket 64 is provided between the hinge seat 61 and the housing 1 to seal the bolt holes and improve the protection level of the hinge assembly 6. The hinge pin 63 is rotatably mounted on the hinge seat 61, and the movable hinge 62 passes through the hinge pin 63. The outer door panel 2 is connected to the movable hinge 62. Rotating the outer door panel 2 causes the outer door panel 2 and the movable hinge 62 to rotate around the hinge pin 63, thus opening and closing the outer door panel 2. Specifically, to improve the sealing effect, the surface of the hinge seat 61 connected to the housing 1 has a stepped hole 65, and the hinge sealing gasket 64 is located inside the stepped hole 65. Similarly, the surface of the movable hinge 62 connected to the outer door panel 2 has a stepped hole 66, and the hinge sealing gasket 67 is located inside the stepped hole 66. By placing the hinge sealing gasket in the recessed stepped hole, the pressure on the hinge sealing gasket is controllable, preventing seal failure due to the tightening force of the hinge screw. It should be noted that it is sufficient to ensure that the movable hinge 62 can rotate; the hinge pin 63 can rotate or not. The hinge sealing gasket 64 is made of rubber, its shape matches the bottom surface of the hinge seat 61, and it has a through hole corresponding to the mounting bolt. After installation, it deforms under pressure to fill the gap, effectively preventing moisture and dust from entering from the hinge installation point.

[0053] Since the hinge point of the inner door panel 3 is on the inside of the door frame 11, both ends of the inner door panel 3 are hinged to the housing 1 using pins. The size of the inner door panel 3 is smaller than that of the door frame 11 so that the inner door panel 3 can be inserted into the door frame 11. The size of the outer door panel 2 is larger than that of the door frame 11 so that it can cover the door frame 11. The outer door panel 2 is provided with a glass observation window for observing the operating status of the components on the inner door panel 3.

[0054] like Figure 8 As shown, in this embodiment, the door lock assembly 4 of the outer door panel 2 includes a handle 41, a lock cylinder 42, a lock sleeve 43, and a lock sleeve nut 44. One end of the handle 41 has an eccentric wheel portion 411. One end of the lock sleeve 43 has a limiting head 431, and the other end has a threaded portion. The lock sleeve nut 44 passes through the threaded portion, and the two are threadedly engaged. The lock cylinder 42 is located inside the lock sleeve 43, with both ends penetrating the lock sleeve 43. One end extends out of the limiting head 431 and is hinged to the eccentric wheel portion 411 of the handle 41. The other end extends out of the lock sleeve 43 and has a lock hook 421 for hooking the door frame 11. The portion of the lock cylinder 42 located inside the lock sleeve 43 has a shoulder portion 422. The limiting head 431 has a blocking portion 432 that can abut against the shoulder portion 422. A spring 46 is provided between the shoulder portion 422 and the blocking portion 432. There is a first sealing gasket 45 and a second sealing gasket 48 between the limiting head 431 and the locking nut 44. The part of the lock cylinder 42 that contacts the locking sleeve 43 is provided with a sealing ring 47. The first sealing gasket 45, the second sealing gasket 48 and the sealing ring 47 constitute the above-mentioned sealing structure.

[0055] During installation, the lock sleeve 43 and lock cylinder 42 (handle 41 and lock sleeve nut 44 are removed) are inserted into the mounting holes of the outer door panel 2. The limiting head 431 abuts against the outer door panel 2, and the first sealing gasket 45 is sandwiched between the limiting head 431 and the outer side of the outer door panel 2 to seal the mounting holes of the outer door panel 2, which is the first layer of sealing protection. Then, the lock sleeve nut 44 is fitted onto the threaded part of the lock sleeve 43 and tightened, and the second sealing gasket 48 is sandwiched between the lock sleeve nut 44 and the inner side of the outer door panel 2, which is the second layer of sealing protection. Finally, the handle 41 is connected to the outward-facing end of the lock cylinder 42. When locking the door, the outer door panel 2 is closed, and then the handle 41 is flipped. The eccentric wheel 411 rotates to the large diameter position, which abuts against the limiting head 431 and pulls the lock cylinder 42, causing the lock cylinder 42 to move outward. The lock hook 421 moves synchronously and abuts against the door frame 11 to achieve locking. Figure 9 As shown, the handle 41 rotates while being flipped, causing the lock hook 421 to overlap with the door frame 11. When unlocking, the handle 41 is flipped in the opposite direction, causing the eccentric wheel 411 to rotate to the smaller diameter, releasing the lock cylinder 42. The lock cylinder 42 moves into the housing 1, and the lock hook 421 moves synchronously, separating from the door frame 11. Figure 10 As shown, the handle 41 is rotated again to make the lock hook 421 misaligned with the door frame 11, thus allowing the door to be opened.

[0056] Since there is a through hole when the lock cylinder 42 passes through the limiting head 431 of the lock sleeve 43, the sealing ring 47 of the contact part between the lock cylinder 42 and the lock sleeve 43 seals the through hole, which is the third layer of sealing protection. The three layers of sealing protection enable the door lock assembly 4 to achieve a tight fit between the outer door panel 2 and the box 1, and also improve the protection level of the low-voltage control box.

[0057] In this embodiment, the inner door panel 3 is locked to the housing using manual screws 9.

[0058] like Figure 1 and Figure 2 As shown, in this embodiment, the housing 1 is provided with a first air hook assembly 7 and a second air hook assembly 8. The first air hook assembly 7 is used to support the opened outer door panel 2, and the second air hook assembly 8 is used to support the opened inner door panel 3. The first air hook assembly 7 includes a first hook rod 71. A mounting block is provided on the bottom wall of the housing 1. The first hook rod 71 is rotatably mounted on the mounting block. A first locking block 22 is provided on the inner side of the outer door panel 2. The first locking block 22 is provided with a first hook hole. The end of the first hook rod 71 away from the housing 1 is used to hook into the first hook hole, thereby limiting the rotation of the outer door panel 2 and maintaining the stability of the outer door panel 2.

[0059] Similarly, the second hook assembly 8 includes a second hook rod 81 and a lifter frame 82. Since the inner door panel 3 is smaller than the door frame 11, the inner door panel 3 is suspended relative to the bottom wall of the box 1 with a certain gap. Therefore, a lifter frame 82 is needed to install the second hook rod 81. The lifter frame 82 is fixed to the bottom wall of the box 1 and is offset from the first hook rod 71. The second hook rod 81 is rotatably mounted on the lifter frame 82. The inner side of the inner door panel 3 is provided with a second locking block 31. The second locking block 31 is provided with a second hook hole. The end of the second hook rod 81 away from the lifter frame 82 is used to hook into the second hook hole, thereby limiting the rotation of the inner door panel 3.

[0060] In this embodiment, the enclosure 1 is made of 2.0mm thick high-quality cold-rolled steel plate, which is CNC bent and then welded. All welded joints adopt a continuous full welding process. After welding, the weld seams are ground and polished to ensure a smooth and burr-free surface. This not only improves the structural strength but also lays a good foundation for subsequent surface coating. After strict phosphating treatment, the inner and outer surfaces of the enclosure 1 are coated with electrostatic powder coating, typically in RAL7035 (light gray). This treatment gives the enclosure excellent corrosion resistance, UV aging resistance, and a good appearance, enabling it to adapt to harsh outdoor environments such as humidity, salt spray, and sunlight.

[0061] The protective frame 12 protruding outward at the door frame 11 is made of steel plate through a one-time stamping and bending process. Its height protrudes more than 5mm from the surface of the housing, forming a sturdy barrier. This design not only greatly enhances the impact and deformation resistance of the door frame area, preventing deformation of the door frame due to bumps during transportation or installation, thus affecting the seal, but more importantly, it provides a sealing surface with sufficient width and extremely high flatness. The foam strip 21 on the inner side of the outer door panel 2 is preferably made of closed-cell EPDM (ethylene propylene diene monomer) foam material, which has extremely low water absorption, excellent weather resistance (temperature range -40℃ to +120℃), and long-lasting high elasticity. Its cross-section is semi-circular, with a height of about 6.5mm, and the compression is designed to be 25%-30%, ensuring sufficient rebound force when the door lock assembly 4 is locked, tightly filling all microscopic gaps between the outer door panel 2 and the protective frame 12, effectively preventing the penetration of dust and water.

[0062] The sealing of the door lock assembly 4 is crucial for protection. Both the first sealing gasket 45 and the second sealing gasket 48 are made of oil-resistant and aging-resistant NBR (nitrile butadiene rubber) with a Shore A hardness of approximately 70, ensuring sufficient compression deformation and durability. During installation, the lock sleeve nut 44 must be tightened with a torque wrench to ensure the sealing gaskets are fully compressed for optimal sealing while avoiding excessive force that could damage the threads or crush the gaskets. The sealing ring 47 between the lock cylinder 42 and the lock sleeve 43 is a standard O-ring made of fluororubber (FKM), whose excellent high-temperature resistance and chemical resistance ensure reliable sealing even during repeated rotation of the lock cylinder 42.

[0063] The hinge sealing gasket 64 of the hinge assembly 6 is also made of EPDM material. Its design completely conforms to the step of the hinge seat 61 and is higher than the step hole, allowing for the compression of the sealing gasket. At the same time, there are pre-drilled holes for the mounting bolts. During installation, the bolts are tightened gradually in a diagonal sequence to compress the sealing gasket evenly and permanently seal the mounting hole.

[0064] The aviation connector assembly 5 uses an industrial-grade aviation connector from a well-known brand, with an IP67 protection rating. During installation, a silicone rubber sealing gasket is added at the opening in enclosure 1. The aviation connector is inserted from the outside and tightened from the inside using the matching lock nut, achieving a seal at the enclosure wall by compressing the silicone gasket. After the cable enters the aviation connector, a secondary seal is achieved using the connector's built-in cable clamping mechanism and rubber sheath, forming a double safety measure.

[0065] To verify the actual performance of the high-protection low-voltage control box in this embodiment, the finished box was subjected to IP55 protection rating certification testing. Among other things: Dustproof test: The chamber was placed in a dust test chamber, and negative pressure was drawn to make the air pressure inside the chamber lower than the outside pressure for 8 hours. After the test, the chamber was opened for inspection, and no dust was found inside.

[0066] Waterproof spray test: Using a standard test nozzle, spray water onto the enclosure from all directions for at least 3 minutes. After the test, open the outer and inner doors. There should be no water stains on the inner walls of the enclosure, electrical components, and wiring terminals, and no leakage at the seals.

[0067] In addition, the enclosure passed a 48-hour salt spray test. After the test, the surface coating showed no blistering or peeling, and the metal substrate did not show red rust, demonstrating extremely strong corrosion resistance.

[0068] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An intelligent high-protection low-voltage control box, characterized in that: The enclosure includes a housing (1), an outer door panel (2), and an inner door panel (3). The housing (1) has a door frame (11). The inner door panel (3) is hinged to the inner side of the door frame (11). The outer door panel (2) is hinged to the outer side of the door frame (11). The outer door panel (2) is provided with a door lock assembly (4) to lock the outer door panel (2) and the door frame (11). The inner side of the outer door panel (2) is provided with at least one ring of foam strip (21) corresponding to the door frame (11) for sealing the outer door panel (2) and the housing (1). The door lock assembly (4) passes through the outer door panel (2), and a sealing structure is provided between the two. The housing (1) contains an intelligent monitoring and protection module for protecting and controlling power equipment. The housing (1) is provided with a cable connector assembly (5) for connecting and disconnecting cables.

2. The intelligent high-protection low-voltage control box according to claim 1, characterized in that: The outer door panel (2) is connected to the door frame (11) via a hinge assembly (6). The hinge assembly (6) includes a hinge seat (61), a movable hinge (62), and a hinge pin (63). The hinge seat (61) is fixed on the housing (1) and a hinge sealing gasket (64) is provided between them. The hinge pin (63) is rotatably mounted on the hinge seat (61). The movable hinge (62) passes through the hinge pin (63). The outer door panel (2) is connected to the movable hinge (62).

3. The intelligent high-protection low-voltage control box according to claim 1, characterized in that: The door lock assembly (4) includes a handle (41), a lock cylinder (42), a lock sleeve (43), and a lock sleeve nut (44). One end of the handle (41) has an eccentric wheel (411). One end of the lock sleeve (43) has a limiting head (431), and the other end has a threaded part. The lock sleeve (43) passes through the mounting hole of the outer door panel (2). The limiting head (431) abuts against the outer door panel (2), and a first sealing gasket (45) is provided between the two. The lock sleeve nut (44) passes through the threaded part, and the two are threadedly engaged. The lock cylinder (42) is located inside the lock sleeve (43). One end of the lock cylinder (42) The lock cylinder (42) extends out of the outer door panel (2) and the limiting head (431) in sequence and is hinged to the eccentric wheel part (411) of the handle (41). The other end of the lock cylinder (42) extends out of the lock sleeve (43) and the extended end is provided with a lock hook (421) for hooking the door frame (11). The part of the lock cylinder (42) located inside the lock sleeve (43) is provided with a shoulder part (422). The limiting head (431) is provided with a blocking part (432) that can abut against the shoulder part (422). A spring (46) is provided between the shoulder part (422) and the blocking part (432). The first sealing gasket (45) constitutes the sealing structure.

4. The intelligent high-protection low-voltage control box according to claim 3, characterized in that: The part of the lock cylinder (42) that contacts the lock sleeve (43) is provided with a sealing ring (47) to further prevent external dust and moisture from entering the interior of the box (1) through the gap between the lock cylinder (42) and the lock sleeve (43).

5. The intelligent high-protection low-voltage control box according to claim 3, characterized in that: A second sealing gasket (48) is provided between the locking nut (44) and the inner side of the outer door panel (2) to enhance the sealing effect inside the mounting hole.

6. The intelligent high-protection low-voltage control box according to any one of claims 1 to 5, characterized in that: The box (1) is provided with a first wind hook assembly (7) and a second wind hook assembly (8). The first wind hook assembly (7) includes a first hook rod (71), which is rotatably disposed in the box (1). The inner side of the outer door panel (2) is provided with a first locking block (22), which is provided with a first hook hole. The end of the first hook rod (71) away from the box (1) is used to hook into the first hook hole to limit the rotation of the outer door panel (2). The second wind hook assembly (8) includes a second hook rod (81) and a height-increasing frame (82). The height-increasing frame (82) is fixed in the box (1). The second hook rod (81) is rotatably disposed on the height-increasing frame (82). The inner side of the inner door panel (3) is provided with a second locking block (31), which is provided with a second hook hole. The end of the second hook rod (81) away from the height-increasing frame (82) is used to hook into the second hook hole to limit the rotation of the inner door panel (3).

7. The intelligent high-protection low-voltage control box according to any one of claims 1 to 5, characterized in that: The box body (1) has an outwardly protruding protective frame (12) at the door frame (11), and the outer door panel (2) covers the protective frame (12). The protective frame (12) is made of high-strength material and its cross-section has a protruding structure.

8. The intelligent high-protection low-voltage control box according to any one of claims 1 to 5, characterized in that: The outer door panel (2) is provided with a glass observation window. The glass observation window is made of high-strength tempered glass, and its edges are fixed to the outer door panel (2) with sealant. It is used to observe the working status of electrical components inside the box in real time.

9. The intelligent high-protection low-voltage control box according to any one of claims 1 to 5, characterized in that: The aviation plug assembly (5) includes multiple aviation plugs, which are respectively located at the top and bottom of the housing (1). Each aviation plug is provided with a waterproof sealing ring at the interface with the housing (1) and is sealed by threaded fasteners to achieve a high level of protection for cable entry and exit.

10. The intelligent high-protection low-voltage control box according to any one of claims 1 to 5, characterized in that: The hinge sealing gasket (64) is made of rubber, its shape matches the bottom surface of the hinge seat (61), and it has through holes corresponding to the mounting bolts. After installation, it deforms under pressure to fill the gap, effectively preventing moisture and dust from entering from the hinge mounting point.

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