Outdoor low-voltage cable branch box

Abstract

The invention relates to the technical field of electrical equipment, in particular to an outdoor low-voltage cable branch box which comprises a double-layer box body and an electrical installation frame, ventilation grids are arranged on the side wall of the double-layer box body to form a ventilation and heat dissipation structure, the electrical installation frame is arranged in the double-layer box body and used for installing electrical equipment, and an installation base with a wiring port is arranged at the bottom of the electrical installation frame. And an inflatable sealing ring is arranged around the periphery of the wiring port. When water is accumulated in the box body, the buoyancy traction ring is influenced by the rising of the water level to generate buoyancy, and drives the annular adjusting frame to move upwards along the sliding rail, so that the cylindrical flexible waterproof film is unfolded to form a vertical waterproof barrier wrapping the electrical mounting frame, and the height of the waterproof barrier can be automatically adjusted along with the rising and falling of the water level; according to the waterproof device, the electrical equipment is ensured to be in a protection state all the time, waterproof protection can be rapidly provided for the electrical equipment under the water accumulation condition through the cylindrical flexible waterproof film and an automatic adjusting mechanism, and the safety and stability of the equipment are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and particularly to an outdoor low-voltage cable distribution box. Background Art

[0002] Outdoor low-voltage cable distribution boxes are indispensable power distribution nodes in urban distribution networks and are widely used in scenarios such as residential areas, industrial parks, and road lighting. Their core functions are to tap, transfer, and protect low-voltage cables. Traditional distribution boxes are usually composed of metal or non-metal boxes, with electrical equipment such as circuit breakers and terminal blocks installed inside. The outside needs to adapt to complex outdoor environments, and usually uses sealing rubber strips, waterproof baffles, or diversion eaves structures to prevent rainwater from seeping into the box through gaps.

[0003] However, with the frequent occurrence of urban waterlogging and the increase in extreme weather, current outdoor distribution boxes are difficult to cope with more severe and complex outdoor environments. In the event of sudden water accumulation, traditional boxes lack a quickly adaptive waterproof barrier and require manual intervention to install temporary water-blocking facilities. The dense arrangement of electrical equipment inside the box limits the operating space when repairing and replacing waterproof components. The conventional ventilation design using ventilation grilles may introduce accumulated water or moisture during heavy rain, while a fully enclosed box depends on a complex temperature control system, significantly increasing costs and energy consumption. Fixed waterproof structures, such as fixed-height water baffle plates, cannot adapt to fluctuations in the depth of accumulated water, and water will still backflow when the water level exceeds the baffle. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an outdoor low-voltage cable distribution box to solve the problem that the current outdoor distribution box's water-blocking structure cannot adapt to fluctuations in the depth of accumulated water and has poor waterproof effect.

[0005] Based on the above purpose, the present invention provides an outdoor low-voltage cable distribution box, including a double-layer box body, the side wall of which is provided with ventilation grilles to form a ventilation and heat dissipation structure, and further includes:

[0006] An electrical installation rack, arranged inside the double-layer box body for installing electrical equipment. The bottom of the electrical installation rack is provided with an installation base with a wire outlet, and an inflatable sealing ring is arranged around the periphery of the wire outlet.

[0007] An annular adjusting rack, arranged around the outside of the installation base. The bottom of the annular adjusting rack is provided with a fitting storage groove and a cylindrical flexible waterproof film is wound and stored therein. The top end of the cylindrical flexible waterproof film is sealed and fixed to the adjusting rack, and the bottom end is sealed and connected to the installation base.

[0008] A vertical sliding track, arranged on the inner wall of the double-layer box body. The annular adjusting rack is slidably connected to the inner wall of the double-layer box body through the vertical sliding track.

[0009] The buoyancy traction ring is connected and arranged on the outer side of the annular adjusting frame. When there is accumulated water inside the box body, the buoyancy traction ring drives the annular adjusting frame to move upward along the sliding track under the action of buoyancy, and the cylindrical flexible waterproof film is pulled to unfold to form a waterproof barrier covering the electrical installation frame, and the covering height is automatically adjusted with the rise and fall of the water level.

[0010] Furthermore, a top air outlet is provided on the top surface of the double-layer box body. An inclined top cover is installed obliquely above the top air outlet for guiding rainwater to slide off. A cooling fan is fixedly installed at the axial center position of the top air outlet. Horizontal guiding grooves are symmetrically arranged on both sides below the top air outlet, and the distance between the two grooves matches the diameter of the cooling fan. A pair of sliding closing plates are fitted and slidably arranged in the horizontal guiding grooves. When they are closed, they form a fully closed plane, and an edge sealing strip is provided at the docking edge.

[0011] Furthermore, an annular fitting groove is arranged around the outer side below the top air outlet. An annular sealing strip is fixedly installed at the top of the annular adjusting frame. When the buoyancy traction ring drives the annular adjusting frame to move upward along the vertical sliding track to the top limit position, the annular sealing strip and the annular fitting groove are mutually fitted to form a sealing interface.

[0012] Furthermore, a top rod guiding sleeve is vertically fixed in the middle inside the annular fitting groove, and an unlocking top rod is nested and slidably connected therein. The bottom of the unlocking top rod extends into the inner cavity of the annular fitting groove, and a locking block is connected and arranged at the top. A locking groove cooperating with the locking block is arranged on the side of the sliding closing plate. The symmetrically arranged sliding closing plates are connected by a traction spring. When the buoyancy traction ring drives the annular adjusting frame to move upward to the top limit position, the fitting action between the annular sealing strip and the annular fitting groove synchronously drives the bottom of the unlocking top rod to be pressed, and the unlocking top rod moves upward along the top rod guiding sleeve, so that the locking block disengages from the locking groove. At this time, the traction spring pulls the closing plates to slide horizontally and close.

[0013] Furthermore, the double-layer box body is composed of an outer box body and an inner box body. An interval sandwich is formed between the side walls of the two for insulation and heat preservation. Ventilation grilles are provided on the side walls of the outer box body and the inner box body. The ventilation grilles are composed of a plurality of horizontally arranged ventilation grooves evenly and parallelly. A guiding vane is installed in each horizontal ventilation groove.

[0014] Furthermore, arc-shaped guiding grooves are respectively provided on the top surface and the bottom surface of the horizontal ventilation groove. A horizontal central axis is disposed through the middle of the guiding vane. Both ends of the horizontal central axis are rotatably connected to the two side walls of the ventilation groove. Guiding protrusions are provided at the front and rear edges of the guiding vane, and a rotational limiting structure is formed by clearance fit between the guiding protrusions and the arc-shaped guiding grooves. An engaging and sealing groove is formed in the middle of the arc-shaped guiding groove. A sealing rubber strip is arranged in the middle of the guiding protrusion. When the guiding vane rotates from the horizontal ventilation state to the vertical sealing state, the sealing rubber strip is engaged with the engaging and sealing groove to seal the horizontal ventilation groove.

[0015] Furthermore, vertical guiding grooves are provided on the inner wall of the spacer layer. A grille adjusting frame is fitted and installed in the spacer layer. The grille adjusting frame is slidably connected with the vertical guiding grooves. Linkage racks are vertically arranged on both the left and right sides of the grille adjusting frame. A driving gear is fixedly arranged at the outer end of the horizontal central axis. The length of the meshing section between the driving gear and the linkage rack covers a 90-degree rotation stroke of a single guiding vane. When the grille adjusting frame moves upward along the vertical guiding groove, the linkage racks sequentially mesh with the driving gears of each layer from bottom to top, driving the corresponding guiding vanes to rotate from the horizontal opening state to the vertical sealing state, and gradually sealing all the horizontal ventilation grooves at the bottom of the box body up to the current height; when the grille adjusting frame moves downward and resets, the linkage racks drive the driving gears to rotate in the reverse direction, causing the guiding vanes to return to the horizontal opening state.

[0016] Furthermore, a linkage buoyancy block is installed at the bottom of the grille adjusting frame. A water inlet is provided at the bottom of the outer box body. A filter screen is embedded inside the water inlet. External accumulated water enters the spacer layer through the water inlet, pushing the linkage buoyancy block to generate a vertical lifting force, driving the grille adjusting frame to move upward. The grille adjusting frame moves up and down synchronously with the water level through the linkage buoyancy block for adjustment.

[0017] Furthermore, a sealing guiding sleeve is horizontally arranged in the middle of the side wall of the ventilation grille. A linkage ejector rod is nested and slidably arranged inside the sealing guiding sleeve. One end of the linkage ejector rod extends into the vertical guiding groove, and the other end is connected with a locking tooth. A locking spring is sleeved in the middle of the linkage ejector rod. In the normal state, the locking spring pushes the locking tooth to engage and lock with the driving gear. When the grille adjusting frame slides along the vertical guiding groove and passes by the linkage ejector rod, the linkage ejector rod is extruded to compress the locking spring and slide horizontally, causing the locking tooth to disengage from the driving gear. At this time, the linkage rack and the driving gear are freely meshed, and the driving gear rotates driven by the linkage rack and is reset by the locking spring to re-lock after the rack passes.

[0018] Furthermore, guiding sliders are connected to both the front and rear ends of the grille adjusting frame. The guiding sliders are in clearance fit with the inner wall of the vertical guiding groove. Multiple guiding rollers are rotatably connected to the middle of the guiding sliders. A guiding pressing block is arranged on the outer side of the linkage rack. Guiding inclined surfaces are arranged at both the upper and lower ends of the guiding pressing block. The guiding pressing block and the linkage rack are arranged in parallel side by side, and the length of the guiding pressing block is greater than that of the linkage rack for unlocking the driving gear in advance and locking the driving gear later.

[0019] Advantages of the present invention: As can be seen from the above, for an outdoor low-voltage cable distribution box provided by the present invention, when water accumulates inside the box body, the buoyancy traction ring generates buoyancy under the influence of the rising water level, and drives the annular adjusting frame to move upward along the sliding track, so that the cylindrical flexible waterproof film unfolds to form a vertical waterproof barrier wrapping the electrical installation frame. As the water level rises and falls, the height of the waterproof barrier will be automatically adjusted to ensure that the electrical equipment is always in a protected state. Under normal conditions, the ventilation grille ensures heat dissipation, and the waterproof film storage does not hinder the airflow. When water accumulates, the waterproof film automatically unfolds to isolate the electrical equipment from water contact, realizing the automatic switching between heat dissipation and waterproofing. Through the cylindrical flexible waterproof film and the automatic adjustment mechanism, waterproof protection can be quickly provided for the electrical equipment in case of water accumulation, greatly improving the safety and stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic diagram of the internal structure of the double-layer box body of the embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the front structure of the double-layer box body of the embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the back structure of the double-layer box body of the embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of the internal structure of the spacer layer of the embodiment of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the electrical installation frame of the embodiment of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the annular adjusting frame in the raised protection state of the embodiment of the present invention;

[0027] Figure 7 Schematic structural diagram of the annular adjustment frame according to an embodiment of the present invention;

[0028] Figure 8 Partial top structural diagram of the double-layer box body according to an embodiment of the present invention;

[0029] Figure 9 Schematic structural diagram of the top air outlet according to an embodiment of the present invention;

[0030] Figure 10 Schematic structural diagram of the air vent grille according to an embodiment of the present invention;

[0031] Figure 11 Schematic structural diagram of the horizontal ventilation groove according to an embodiment of the present invention;

[0032] Figure 12 Schematic structural diagram of the guide vane rotated to the vertical closed state according to an embodiment of the present invention;

[0033] Figure 13 Schematic structural diagram of the locking tooth according to an embodiment of the present invention;

[0034] Figure 14 Schematic structural diagram of the grille adjustment frame according to an embodiment of the present invention.

[0035] The markings in the figure are:

[0036] 1. Double-layer box body; 101. Outer box body; 102. Inner box body; 103. Lifting base; 104. Spacing interlayer; 105. Water inlet; 106. Filter screen; 107. Vertical sliding track; 108. Vertical guiding groove; 109. Inspection door; 2. Inclined top cover; 201. Top air outlet; 202. Heat dissipation fan; 203. Horizontal guiding groove; 204. Sliding closing plate; 205. Traction spring; 206. Edge sealing strip; 207. Locking card slot; 3. Annular fitting groove; 301. Unlocking ejector rod; 302. Ejector rod guiding sleeve; 303. Locking block; 4. Electrical installation frame; 401. Installation base; 402. Wiring opening; 403. Inflatable sealing ring; 5. Annular adjustment frame; 501. Annular sealing strip; 502. Buoyancy traction ring; 503. Fitting receiving groove; 504. Cylindrical flexible waterproof film; 6. Air vent grille; 601. Horizontal ventilation groove; 602. Arc-shaped guiding groove; 603. Fitting closing groove; 7. Guide vane; 701. Horizontal central axis; 702. Driving gear; 703. Guiding protrusion; 704. Sealing strip; 8. Locking tooth; 801. Linkage ejector rod; 802. Closing guiding sleeve; 803. Locking spring; 9. Grille adjustment frame; 901. Linkage buoyancy block; 902. Linkage rack; 903. Guiding pressing block; 904. Guiding inclined plane; 905. Guiding slider; 906. Guiding roller. Detailed implementation mode

[0037] To make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with specific embodiments.

[0038] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0039] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown in

[0040] An electrical installation rack 4, which is arranged inside the double-layer box body 1 and is used for installing electrical equipment. The bottom of the electrical installation rack 4 is provided with an installation base 401 with a wire passing port 402, and an inflatable sealing ring 403 is arranged around the periphery of the wire passing port 402;

[0041] An annular adjusting rack 5, which is arranged around the outside of the installation base 401. The bottom of the annular adjusting rack 5 is provided with a fitting receiving groove 503 and a cylindrical flexible waterproof film 504 is wound and received. The top end of the cylindrical flexible waterproof film 504 is fixedly sealed with the adjusting rack, and the bottom end is sealed and connected with the installation base 401;

[0042] A vertical sliding track 107, which is arranged on the inner wall of the double-layer box body 1. The annular adjusting rack 5 is slidably connected with the inner wall of the double-layer box body 1 through the vertical sliding track 107;

[0043] The buoyancy traction ring 502 is connected and arranged outside the annular adjusting frame 5. When there is accumulated water inside the box body, the buoyancy traction ring 502 drives the annular adjusting frame 5 to move upward along the sliding track under the action of buoyancy, and the cylindrical flexible waterproof film 504 is pulled to unfold to form a waterproof barrier covering the electrical installation frame 4, and the covering height is automatically adjusted with the rise and fall of the water level.

[0044] In this embodiment, the distribution box adopts a double-layer design. The double-layer box body 1 is arranged above the lifting base 103 at the bottom to increase the overall height for preventing accumulated water. The side wall of the double-layer box body 1 is provided with ventilation grilles 6 to form a ventilation and heat dissipation structure, forming a natural convection channel for heat dissipation. An electrical installation frame 4 is arranged inside the double-layer box body 1 for installing various electrical equipment. The bottom of the electrical installation frame 4 is provided with an installation base 401 with a wire passing opening 402. An inflatable sealing ring 403 is arranged around the periphery of the wire passing opening 402. After inflation, it fits tightly with the cable, effectively preventing moisture and dust from entering the box body. And a maintenance door 109 is arranged on the front of the double-layer box body 1 of the distribution box. The maintenance door 109 is connected to the box body through double hinges installed on the side, which is convenient for loading, unloading and maintaining the internal electrical equipment by opening the maintenance door 109. An annular adjusting frame 5 is sleeved outside the installation base 401. Its bottom is provided with a U-shaped fitting storage groove 503, and a cylindrical flexible waterproof film 504, such as a PVC-coated fabric or a plastic film, is wound and stored inside. And a vertical sliding track 107 is arranged on the inner wall of the double-layer box body 1. The annular adjusting frame 5 is slidably connected to the inner wall of the box body through these tracks, ensuring that the annular adjusting frame 5 can move up and down smoothly. And a buoyancy traction ring 502 is connected and arranged outside the annular adjusting frame 5. The buoyancy traction ring 502 is made of a hollow or foamed material and has a large buoyancy. When there is accumulated water inside the box body, the buoyancy traction ring 502 generates buoyancy under the influence of the rising water level and drives the annular adjusting frame 5 to move upward along the sliding track, so that the cylindrical flexible waterproof film 504 unfolds to form a waterproof protection for the electrical installation frame 4. As the water level rises and falls, the height of the waterproof barrier will be automatically adjusted to ensure that the electrical equipment is always in a protected state. Under normal conditions, the ventilation grilles 6 ensure heat dissipation, and the waterproof film storage does not hinder the air flow and is also convenient for the operation and maintenance of the electrical equipment. When there is accumulated water, the waterproof film automatically unfolds to isolate the electrical equipment from water contact, realizing the automatic switching between heat dissipation and waterproofing. Through the cylindrical flexible waterproof film 504 and the automatic adjustment mechanism, waterproof protection can be quickly provided for the electrical equipment in case of accumulated water, greatly improving the safety and stability of the equipment.

[0045] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9As shown, preferably, a top air outlet 201 is provided on the top surface of the double-layer box body 1 of the branch box. This air outlet is used to discharge the heat generated inside the box due to the operation of electrical equipment. An inclined top cover 2 is installed obliquely above the top air outlet 201. The top cover is designed at a certain angle to ensure that rainwater can slide along its inclined surface and avoid directly entering the top air outlet 201, thereby protecting the internal electrical equipment from the external environment. A cooling fan 202 is fixedly installed at the axial center position of the top air outlet 201 to accelerate the discharge of hot air inside the box and guide the cooling air flow, further improving the cooling effect. On both sides symmetrically below the top air outlet 201, horizontal guide grooves 203 are provided. The distance between the two grooves matches the diameter of the cooling fan 202. A pair of sliding closing plates 204 are fitted and slidably arranged in these guide grooves. When these two closing plates are closed, they form a fully enclosed plane, and an edge sealing strip 206 is provided at the docking edge to ensure the closing effect. Under the condition of not requiring forced ventilation or in bad weather conditions, dust, moisture, etc. can be prevented from entering the inside of the box by closing the sliding closing plates 204, further improving the protection performance of the branch box.

[0046] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, preferably, a circular fitting groove 3 is provided around the outside below the top air outlet 201 of the branch box. A circular sealing strip 501 is fixedly installed at the top of the circular adjusting frame 5. When the buoyancy traction ring 502 drives the circular adjusting frame 5 to move upward along the vertical sliding track 107 to the top limit position due to the buoyancy generated by the accumulated water in the box body, the circular sealing strip 501 and the circular fitting groove 3 are fitted with each other to form a tight sealing interface, ensuring that even under extreme conditions, such as severe water accumulation, water can be effectively prevented from entering the inside. A top rod guide sleeve 302 is vertically fixed in the middle inside the circular fitting groove 3, and an unlocking top rod 301 is nested and slidably connected therein. The bottom of the unlocking top rod 301 extends to the inner cavity of the circular fitting groove 3, and a locking block 303 is connected and arranged at the top. A locking groove 207 that cooperates with the locking block 303 is provided on the side of the sliding closing plate 204. The symmetrically arranged sliding closing plates 204 are connected by a traction spring 205. When the buoyancy traction ring 502 drives the circular adjusting frame 5 to move upward to the top limit position, the fitting action of the circular sealing strip 501 and the circular fitting groove 3 synchronously drives the bottom of the unlocking top rod 301 to be pressed, and the unlocking top rod 301 moves upward along the top rod guide sleeve 302, so that the locking block 303 disengages from the locking groove 207, automatically releasing the locking state of the sliding closing plate 204. The traction spring 205 pulls the closing plate to slide horizontally and close, and the whole process does not require manual intervention, greatly improving the automation degree and response speed of the system, and thus completely enclosing the space where the electrical installation frame 4 is located, which is beneficial to further improving the protection performance of the branch box.

[0047] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 As shown, preferably, the double-layer box body 1 of the branch box is composed of an outer box body 101 and an inner box body 102. An interval sandwich layer 104 is formed between the side walls of the two, which is not only used for electrical insulation but also provides additional heat preservation effect, helping to maintain the temperature stability inside the box and reducing the influence of the external environment on the internal electrical equipment. Ventilation grilles 6 are provided on the side walls of the outer box body 101 and the inner box body 102. These ventilation grilles 6 are composed of a plurality of horizontally arranged ventilation slots 601 that are evenly parallel, ensuring air circulation while also increasing the structural strength. A guide vane 7 is installed in each horizontal ventilation slot 601, and these guide vanes 7 can adjust the angle according to needs to optimize the air flow direction and speed and improve the heat dissipation efficiency.

[0048] As Figure 1 ,Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 As shown in Figure 12 , preferably, arc-shaped guiding grooves 602 are respectively provided on the top surface and the bottom surface of the branch box in the horizontal ventilation groove 601. Guiding protrusions 703 are provided at the front and rear edges of the guiding vane 7, and a rotational limiting structure is formed by clearance fit with the arc-shaped guiding grooves 602. These guiding grooves provide a rotation path for the guiding vane 7. A horizontal central axis 701 is provided through the middle of the guiding vane 7, and both ends of the axis are rotatably connected to the side walls of the ventilation groove, ensuring that the guiding vane 7 can rotate smoothly. An engaging and sealing groove 603 is provided in the middle of the arc-shaped guiding groove 602, and a sealing rubber strip 704 is provided in the middle of the guiding protrusion 703. When it is necessary to switch from the horizontal ventilation state to the vertical sealing state, the guiding vane 7 can be rotated manually or through an automatic control system. When the guiding vane 7 rotates to the vertical position, the sealing rubber strip 704 will be engaged with the engaging and sealing groove 603, thereby effectively sealing the horizontal ventilation groove 601, preventing external dust, moisture, accumulated water, etc. from entering the interior of the box body, being beneficial to further improving the protection performance of the branch box, and realizing effective management of the ventilation and sealing states, not only ensuring the safe operation of electrical equipment, but also enhancing the overall performance and reliability of the system.

[0049] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14As shown, preferably, vertical guide grooves 108 are provided on the inner wall of the spaced sandwich layer 104 of the double-layer box body 1. A grille adjusting frame 9 is fitted and installed in the spaced sandwich layer 104. The grille adjusting frame 9 is slidably connected with the vertical guide grooves 108. Linkage racks 902 are vertically arranged on both the left and right sides of the grille adjusting frame 9. And at the outer end of the horizontal central axis 701 of each flow guiding blade 7, a driving gear 702 is fixedly provided. And the length of the meshing section between the driving gear 702 and the linkage rack 902 is designed to cover the ninety-degree rotation stroke of a single flow guiding blade 7. When the grille adjusting frame 9 moves upward along the vertical guide grooves 108, the linkage racks 902 can be meshed with the driving gears 702 of each layer in sequence from bottom to top, thereby driving the corresponding flow guiding blades 7 to rotate from the horizontal open state to the vertical closed state, gradually closing all the horizontal ventilation slots 601 at the bottom of the box body up to the current height. When the grille adjusting frame 9 moves downward to reset, the linkage racks 902 will drive the driving gears 702 to rotate in the reverse direction, so that the flow guiding blades 7 return to the horizontal open state, thus facilitating the closing or opening of the corresponding number of horizontal ventilation slots 601 according to requirements, making it more convenient and flexible to use. At the same time, a linkage buoyancy block 901 is installed at the bottom of the grille adjusting frame 9. At the same time, a water inlet 105 is opened at the bottom of the outer box body 101, and a filter net 106 is embedded inside the water inlet 105 to prevent large-particle impurities from entering. External accumulated water can enter the interior of the spaced sandwich layer 104 through the water inlet 105. The linkage buoyancy block 901 is of a hollow structure or a foaming material and has a large buoyancy. Thus, the external accumulated water can push the linkage buoyancy block 901 to generate a vertical lifting force, and then drive the grille adjusting frame 9 to move upward. The grille adjusting frame 9 can automatically adjust its position according to the water level change. Through the linkage buoyancy block 901 moving up and down synchronously with the water level rise and fall for adjustment, the dynamic management of the opening and closing states of the ventilation slots is realized. The opening and closing actions of the ventilation slots can be completed without manual intervention, reducing the workload of daily maintenance and improving the safety and stability of the equipment. By precisely controlling the opening and closing of the ventilation slots, not only can electrical equipment be protected from damage under bad weather conditions such as rainy days, but also the best working temperature can be maintained under non-extreme conditions, prolonging the service life of the equipment and improving the overall safety.

[0050] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14As shown, preferably, a closed guide sleeve 802 is horizontally arranged in the middle of the side wall of the ventilation grille 6 of the branch box. A linkage ejector rod 801 is nested and slidably arranged inside the guide sleeve. One end of the linkage ejector rod 801 extends into the vertical guide groove 108, and the other end is connected with a locking tooth 8. A locking spring 803 is sleeved on the middle part of the linkage ejector rod 801. Under normal conditions, the locking spring 803 pushes the locking tooth 8 to engage and lock with the driving gear 702. Without external force, the driving gear 702 will remain fixed and cannot rotate freely, ensuring that when the guide vane 7 does not need to be adjusted, the driving gear 702 will not rotate accidentally, thus guaranteeing the stability of the system. When the grille adjusting frame 9 slides along the vertical guide groove 108 and passes by the linkage ejector rod 801, it squeezes the linkage ejector rod 801 to compress the locking spring 803 and slide horizontally, so that the locking tooth 8 disengages from the driving gear 702. At this time, the linkage rack 902 freely meshes with the driving gear 702, and the driving gear 702 can rotate as the linkage rack 902 moves to adjust the angle of the guide vane 7. Once the linkage rack 902 passes through the position of the driving gear 702, the locking spring 803 will push the linkage ejector rod 801 to return to its original position, making the locking tooth 8 engage with the driving gear 702 again to lock the driving gear 702 again and prevent its unnecessary rotation, ensuring the stability and safety of the system.

[0051] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14As shown, preferably, guiding sliders 905 are connected to both the front and rear ends of the grille adjusting frame 9 of the branch box. A clearance fit is adopted between the guiding sliders 905 and the wall of the vertical guiding groove 108, ensuring the stable sliding of the grille adjusting frame 9 in the vertical direction. A plurality of guiding rollers 906 are rotatably connected to the middle of the guiding sliders 905. These guiding rollers 906 reduce the frictional force between the guiding pressing block 903 and the vertical guiding groove 108, making the up and down movement of the grille adjusting frame 9 smoother. A guiding pressing block 903 is arranged on the outer side of the linkage rack 902. Guiding inclined surfaces 904 are arranged at both the upper and lower ends of the guiding pressing block 903. The guiding inclined surfaces 904 ensure that the linkage ejector rod 801 can be accurately pressed, thereby realizing the unlocking and locking operations. The guiding pressing block 903 and the linkage rack 902 are arranged in parallel side by side, and the designed length of the guiding pressing block 903 is greater than the length of the linkage rack 902. Thus, the guiding pressing block 903 starts to press the linkage ejector rod 801 before the linkage rack 902 reaches the driving gear 702, unlocking the driving gear 702 in advance. After the linkage rack 902 passes, the guiding pressing block 903 continues to maintain the pressure on the linkage ejector rod 801 until it completely leaves the area of the driving gear 702, thereby delaying the locking time of the driving gear 702. This ensures that during the entire adjustment process, the driving gear 702 is always in a freely rotating state, avoiding unnecessary locking interference and accidental locking of the driving gear 702 during the adjustment process, ensuring the smooth adjustment of the angle of the guide vane 7, and improving the safety and protection performance of the equipment.

[0052] For the outdoor low-voltage cable branch box provided by the present invention, when water accumulates inside the box body, the buoyancy traction ring 502 generates buoyancy under the influence of the rising water level and drives the annular adjusting frame 5 to move upward along the sliding track, so that the cylindrical flexible waterproof film 504 unfolds to form a vertical waterproof barrier wrapping the electrical installation frame 4. As the water level rises and falls, the height of the waterproof barrier will be automatically adjusted to ensure that the electrical equipment is always in a protected state. Under normal conditions, the ventilation grille 6 ensures heat dissipation, and the waterproof film storage does not hinder the airflow. When there is water accumulation, the waterproof film automatically unfolds to isolate the electrical equipment from water contact, realizing the automatic switching between heat dissipation and waterproofing. Through the cylindrical flexible waterproof film 504 and the automatic adjustment mechanism, waterproof protection can be quickly provided for the electrical equipment in case of water accumulation, greatly improving the safety and stability of the equipment.

[0053] Those of ordinary skill in the art should understand that: The discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; Under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity. Any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An outdoor low-voltage cable branch box, comprising a double-layer box body (1), the side walls of which are provided with ventilation grilles (6) to form a ventilation and heat dissipation structure, characterized in that: Also includes: An electrical installation frame (4) is arranged inside the double-layer box (1) and is used to install electrical equipment. A mounting base (401) with a wiring opening (402) is provided at the bottom of the electrical installation frame (4), and an inflatable sealing ring (403) is arranged around the periphery of the wiring opening (402); An annular adjustment frame (5) is arranged around the outer side of the mounting base (401); a fitting receiving groove (503) is provided at the bottom of the annular adjustment frame (5) and a cylindrical flexible waterproof membrane (504) is wound and stored therein; the top end of the cylindrical flexible waterproof membrane (504) is sealed and fixed to the adjustment frame, and the bottom end is sealed and connected to the mounting base (401); A vertical sliding track (107) is arranged on the inner wall of the double-layer box (1), and the annular adjustment frame (5) is slidably connected to the inner wall of the double-layer box (1) via the vertical sliding track (107); The buoyancy traction ring (502) is connected to the outer side of the annular adjustment frame (5). When water accumulates inside the box, the buoyancy traction ring (502) is driven by the buoyancy to drive the annular adjustment frame (5) to move upward along the sliding track, and the traction cylindrical flexible waterproof membrane (504) is unfolded to form a waterproof barrier covering the electrical installation frame (4), and the covering height is automatically adjusted as the water level rises and falls.

2. The outdoor low-voltage cable branch box according to claim 1 is characterized in that: The top surface of the double-layer box (1) is provided with a top air outlet (201), and an inclined top cover (2) is installed obliquely above the top air outlet (201) for guiding rainwater to slide down. A cooling fan (202) is fixedly installed at the axial position of the top air outlet (201), and horizontal guide grooves (203) are symmetrically arranged on both sides below the top air outlet (201), and the distance between the two grooves matches the diameter of the cooling fan (202). A pair of sliding closing plates (204) are slidably arranged in the horizontal guide grooves (203), which form a fully enclosed plane when closed, and edge sealing strips (206) are provided at the butting edges.

3. The outdoor low-voltage cable branch box according to claim 2 is characterized in that: An annular interlocking groove (3) is arranged around the lower outer side of the top air outlet (201), and an annular sealing strip (501) is fixedly installed on the top of the annular adjustment frame (5). When the buoyancy traction ring (502) drives the annular adjustment frame (5) to move up to the top limit position along the vertical sliding track (107) under the action of buoyancy, the annular sealing strip (501) and the annular interlocking groove (3) interlock with each other to form a sealing interface.

4. The outdoor low-voltage cable branch box according to claim 3 is characterized in that: A push rod guide sleeve (302) is vertically fixed in the middle of the inner side of the annular engaging groove (3), and a sliding unlocking push rod (301) is nested therein; the bottom of the unlocking push rod (301) extends to the inner cavity of the annular engaging groove (3), and a locking block (303) is connected to the top; the side of the sliding closing plate (204) is provided with a locking groove (207) that cooperates with the locking block (303); the symmetrically arranged sliding closing plates (204) are connected by The traction spring (205) is connected. When the buoyancy traction ring (502) drives the annular adjustment frame (5) to move up to the top limit position, the engagement action of the annular sealing strip (501) and the annular engagement groove (3) synchronously drives the bottom of the unlocking push rod (301) to be compressed. The unlocking push rod (301) moves up along the push rod guide sleeve (302), so that the locking block (303) is disengaged from the locking groove (207). At this time, the traction spring (205) pulls the closing plate to slide horizontally and close.

5. The outdoor low-voltage cable branch box according to claim 1 is characterized in that: The double-layer box (1) is composed of an outer box (101) and an inner box (102), and a spacer layer (104) is formed between the side walls of the two for insulation and heat preservation. The side walls of the outer box (101) and the inner box (102) are both provided with ventilation grilles (6), and the ventilation grilles (6) are composed of a plurality of evenly parallel horizontal ventilation slots (601), and each horizontal ventilation slot (601) is embedded with a guide vane (7).

6. The outdoor low-voltage cable branch box according to claim 5, characterized in that: The top and bottom surfaces of the horizontal ventilation slot (601) are respectively provided with arc-shaped guide slots (602); a horizontal central axis (701) is arranged through the middle of the guide blade (7); two ends of the horizontal central axis (701) are rotatably connected to the two side walls of the ventilation slot; the front and rear edges of the guide blade (7) are provided with guide protrusions (703), which are clearance-matched with the arc-shaped guide slot (602) to form a rotation limiting structure; a chimeric sealing slot (603) is provided in the middle of the arc-shaped guide slot (602); a sealing rubber strip (704) is arranged in the middle of the guide protrusion (703); when the guide blade (7) rotates from a horizontal ventilation state to a vertical closed state, the sealing rubber strip (704) and the chimeric sealing slot (603) are chimerically engaged with each other to close the horizontal ventilation slot (601).

7. The outdoor low-voltage cable branch box according to claim 6, characterized in that: The inner wall of the spacing sandwich (104) is provided with a vertical guide groove (108), a grille adjustment frame (9) is embedded and installed in the spacing sandwich, the grille adjustment frame (9) is slidably connected to the vertical guide groove (108), and linkage racks (902) are vertically provided on both left and right sides of the grille adjustment frame (9), a driving gear (702) is fixedly provided on the outer end of the horizontal central axis (701), and the meshing section length of the driving gear (702) and the linkage rack (902) covers a single guide blade (7). The grille adjustment frame (9) has a 90-degree rotation stroke. When the grille adjustment frame (9) moves upward along the vertical guide groove (108), the linkage rack (902) sequentially engages with the driving gears (702) of each layer from bottom to top, driving the corresponding guide vanes (7) to rotate from a horizontal open state to a vertical closed state, and gradually closes all horizontal ventilation slots (601) from the bottom of the box to the current height; when the grille adjustment frame (9) moves downward to reset, the linkage rack (902) drives the driving gear (702) to rotate in the opposite direction, so that the guide vanes (7) return to the horizontal open state.

8. The outdoor low-voltage cable branch box according to claim 7, characterized in that: A linkage buoyancy block (901) is installed at the bottom of the grille adjustment frame (9), a water inlet (105) is opened at the bottom of the outer box body (101), and a filter screen (106) is embedded inside the water inlet (105). External accumulated water enters the interior of the spacer interlayer (104) through the water inlet (105) to push the linkage buoyancy block (901) to generate vertical lift, thereby driving the grille adjustment frame (9) to move upward. The grille adjustment frame (9) moves up and down synchronously with the water level rise and fall through the linkage buoyancy block (901) to be adjusted.

9. The outdoor low-voltage cable branch box according to claim 8, characterized in that: A closed guide sleeve (802) is horizontally arranged in the middle of the side wall of the ventilation grille (6), and a linkage push rod (801) is nested and slidably arranged inside the closed guide sleeve (802), one end of the linkage push rod (801) extends into the vertical guide groove (108), and the other end is connected to a locking tooth (8), and a locking spring (803) is sleeved in the middle of the linkage push rod (801), and the locking spring (803) pushes the locking tooth (8) and the driving gear (702) to form a locking mechanism under normal conditions. Engagement and locking: when the grille adjustment frame (9) slides along the vertical guide groove (108) and passes through the linkage push rod (801), the linkage push rod (801) is squeezed to make the push rod compress the locking spring (803) to slide horizontally, so that the locking tooth (8) is disengaged from the driving gear (702). At this time, the linkage rack (902) and the driving gear (702) are freely engaged, and the driving gear (702) is driven to rotate with the linkage rack (902), and is reset and locked again by the locking spring (803) after the rack passes.

10. The outdoor low-voltage cable branch box according to claim 9, characterized in that: The grille adjustment frame (9) is connected to guide sliders (905) at both the front and rear ends. The guide sliders (905) are clearance-matched with the groove walls of the vertical guide grooves (108). The middle part of the guide slider (905) is rotatably connected to a plurality of guide rollers (906). A guide top pressure block (903) is arranged on the outer side of the linkage rack (902). The upper and lower ends of the guide top pressure block (903) are both provided with guide inclined surfaces (904). The guide top pressure block (903) and the linkage rack (902) are arranged parallel to each other, and the length of the guide top pressure block (903) is greater than the length of the linkage rack (902) so as to unlock the drive gear (702) in advance and lock the drive gear (702) in a delayed manner.

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