Waterproof and moistureproof cable branch box

Abstract

The present application relates to power transmission and distribution equipment technical field, especially to a kind of waterproof and moistureproof cable branch box, including bottom frame, triangular support, flip door and pneumatic support rod, bottom frame top central position is equipped with triangular support, the two end faces of triangular support are the installation bearing work surface of electrical components, the two sides of triangular support upper end are hinged with flip door, flip door inner side wall and two inclined surfaces of triangular support are matched and adapted, two sides flip door are independently matched and set a pneumatic support rod, one end of pneumatic support rod is hinged in the inner side wall of triangular support, the other end is hinged in the inner side wall of corresponding side flip door.The device is installed by stone base pad, the box is sealed with rubber strip, the ventilation groove is shielded by waterproof cover to form multiple basic waterproof structure, and the inclined plate is used for guiding, the water inlet is used for collecting water, the inclined drain pipe is matched with the inclined drain groove, which can automatically drain the condensed water vapor in the box, effectively avoid the problem of moisture, water accumulation and component corrosion in the box.

Description

Technical Field

[0001] This invention relates to the field of power transmission and distribution equipment technology, and in particular to a waterproof and moisture-proof cable branch box. Background Technology

[0002] Outdoor cable distribution boxes operate in complex environments with rain, snow, and large temperature variations. Existing cable distribution boxes are generally equipped with raised base structures and ventilation slots for rain protection, which can, to a certain extent, prevent ground water backflow and rainwater direct flow into the box, achieving basic outdoor waterproof protection.

[0003] However, existing technologies still have significant drawbacks: traditional branch boxes rely solely on passive protection methods such as external water blocking and elevation to prevent seepage, without providing specific drainage, collection, and external discharge structures for condensation inside the box. Under alternating day and night temperature conditions, the hot and humid air inside the box is prone to condensation upon cooling, and this condensation cannot be discharged in a timely and orderly manner, easily adhering to and dripping onto the inner walls of the box and the surfaces of components.

[0004] Meanwhile, the sealing structure at the door joints and cavity splicing points of conventional enclosures is simple, resulting in limited sealing effectiveness. External moisture can still penetrate the enclosure through tiny gaps. Over long-term operation, this can easily lead to problems such as dampness accumulation inside the enclosure, component corrosion, and wiring aging, reducing the operational stability of the power distribution equipment and failing to meet the long-term, stable waterproof and moisture-proof requirements of outdoor cable branch boxes. Summary of the Invention

[0005] To overcome the shortcomings of existing cable distribution boxes, which only have a raised foundation and rain protection structure, lack a dedicated internal condensate drainage structure, have limited sealing and moisture-proof performance, and are prone to condensation and moisture intrusion, which can easily cause components to become damp and corrode and equipment to have poor operational stability, this invention provides a waterproof and moisture-proof cable distribution box.

[0006] The technical implementation of this invention is as follows: A waterproof and moisture-proof cable distribution box includes a base frame, a triangular bracket, a flip-top door, and pneumatic support rods. A triangular bracket is mounted at the center of the top of the base frame. The two ends of the triangular bracket serve as mounting surfaces for electrical components. Flip-top doors are hinged to both sides of the upper end of the triangular bracket. The inner walls of the flip-top doors fit snugly against the two inclined surfaces of the triangular bracket. Each flip-top door is independently fitted with a pneumatic support rod, one end of which is hinged to the inner wall of the triangular bracket, and the other end is hinged to the inner wall of the corresponding flip-top door. Several ventilation slots are evenly spaced on both sides of the base frame. A fixed guide plate is also included. The system includes movable guide plates, inclined plates, drain pipes, drain channels, and cleaning components. Fixed guide plates are symmetrically installed on both sides of the upper part of the triangular bracket. Movable guide plates are installed at corresponding positions on the top of the inner side of the flip doors on both sides. The movable guide plates fit snugly with the corresponding fixed guide plates. Two inclined plates arranged symmetrically in a V-shape are installed on the upper side of the inner side of the flip doors on both sides. Drain pipes are connected between the two inclined plates on the same side. Water collection inlets are opened on the wall of the drain pipes corresponding to the area above the inclined plates. Drain channels are connected to the outer walls of the flip doors on both sides at the corresponding installation positions of the drain pipes. The outer end of the drain pipe penetrates the wall of the flip door and communicates with the inner cavity of the drain channel. Cleaning components are installed on the drain pipes.

[0007] Furthermore, the drainage pipes on both sides are laid at a slight inclination towards the drainage trough, and the bottom surface of the drainage trough adopts a sloping flow guiding structure design.

[0008] Furthermore, sealing strips are affixed to the joints where the flip door meets the two ends of the triangular bracket and the top of the bottom frame.

[0009] Furthermore, the cleaning assembly includes a support frame, a gravity column, pulleys, guide wheels, a cleaning ring, a pull rope, and a return spring. The top of each drain pipe is connected to a support frame, and a gravity column is slidably mounted inside each support frame. Pulleys are rotatably mounted at both ends inside the support frame. Guide wheels are rotatably mounted at both ends of the top of each drain pipe. A cleaning ring is slidably mounted in the area between the two guide wheels inside the drain pipe. The outer wall of the cleaning ring slides in a gap with the inner wall of the drain pipe. A closed pull rope is wound around the two pulleys and two guide wheels on the same side. The pull rope passes through and connects to the gravity column and the cleaning ring. A return spring is connected between the inner end face of the gravity column and the inner wall of the corresponding support frame.

[0010] Furthermore, the inner wall of the support frame is coated with a polytetrafluoroethylene anti-friction coating, and the outer wall of the gravity column is polished.

[0011] Furthermore, it also includes door locks, with door locks installed on the outer walls of both flip doors. The door locks include lock bases fixed to the side walls of the bottom frame, retractable lock tongues, and lock cylinder mechanisms.

[0012] Furthermore, it also includes partitions, placement slots, support nets, drain valves, waterproof covers, and self-sealing components. Partitions are installed on both sides inside the bottom frame, and the gap between the partitions and the side walls of the bottom frame forms a ventilation channel. Placement slots are connected to the upper outer sides of the partitions, and support nets are installed at the bottom of the placement slots. The placement slots are used to hold and place desiccants. Drain valves are embedded in the right side wall of the bottom frame at the positions corresponding to the two ventilation channels. Waterproof covers are installed on the top of the ventilation slots, and self-sealing components are installed inside the ventilation channels.

[0013] Furthermore, the self-sealing assembly includes guide rods, support rods, sliding plates, airbags, sleeves, top rods, sealing plates, guide grooves, buffer springs, sealing blocks, and compression springs. Multiple guide rods are evenly spaced at the bottom of the ventilation channel inside the base frame. The tops of multiple guide rods within the same ventilation channel are all fixedly connected to a support rod. The end of the support rod is fixedly connected to the outer wall of the corresponding side partition. Two sliding plates are slidably fitted between the guide rods within the same ventilation channel. An airbag is fixedly fitted between the two sliding plates on the same side. A sealing plate is fitted on the outside of each guide rod. There is a compression spring, and the two ends of the compression spring are connected to the top of the upper sliding plate and the bottom of the support rod, respectively. Several sleeves are fixedly installed at intervals on the top of the upper sliding plate. A top rod is vertically slidably installed inside each sleeve. Sealing plates are rotatably hinged to the corresponding positions on the outer wall of the partition and above the ventilation channel. Sealing blocks are installed on the inner two walls of the bottom frame and at the matching positions above the corresponding sealing plates. Guide grooves are opened at the bottom of the sealing plates corresponding to the positions of each top rod. The top of the top rod and the corresponding guide groove form a sliding fit structure. Buffer springs are installed between the support rod and the sleeve on the corresponding side.

[0014] The present invention has the following advantages: 1. The device forms a multi-foundation waterproof structure by raising the installation on the stone base, sealing the box with sealing strips, and covering the ventilation groove with a waterproof cover. At the same time, by using inclined plate to guide the flow, water collection port to collect water, and inclined drain pipe and inclined drainage groove to cooperate, the condensed water vapor inside the box can be automatically discharged, effectively avoiding the problems of moisture, water accumulation and corrosion of components inside the box.

[0015] 2. This device uses the opening and closing action of the flip-top door to link the cleaning components, which can automatically scrape and discharge dirt and residual water from the inner wall of the drain pipe, avoiding blockage problems in the drain pipe after long-term use. No manual cleaning is required, and the device can continuously ensure stable drainage and moisture-proof performance.

[0016] 3. This device relies on the ventilation slots in the bottom frame to achieve internal and external air convection. The fixed guide plate and the movable guide plate work together to form a directional airflow channel. With the help of the V-shaped inclined plate, the hot airflow is diverted and guided, so that the internal heat is evenly discharged, effectively improving the problem of heat accumulation inside the box, reducing the temperature difference between inside and outside, reducing the probability of condensation and water vapor generation, and helping to improve the moisture-proof effect.

[0017] 4. This device is equipped with a self-sealing component for the ventilation channel. When water backflows, the sealing plate can be automatically triggered by the buoyancy of the airbag to block the channel and prevent water from entering the tank. After the water recedes, it can automatically reset and drain the residual water with the drain valve, effectively improving the outdoor protection capability of the equipment under heavy rain and water accumulation conditions. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the flip door, door lock, and ventilation slot components of the present invention.

[0020] Figure 3 This is a three-dimensional structural diagram of the flip-top door, pneumatic strut, and inclined plate components of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of the components of the present invention, including the fixed guide plate, the movable guide plate, and the inclined plate.

[0022] Figure 5 This is a schematic diagram of the airflow path within the branch box of the present invention.

[0023] Figure 6 This is a three-dimensional structural diagram of the components of the present invention, such as the drainage pipe, drainage channel, and water collection port.

[0024] Figure 7 This is a three-dimensional structural diagram of the inclined plate, drainage pipe and drainage channel of the present invention.

[0025] Figure 8 This is a three-dimensional structural diagram of the gravity column, pulley, and guide wheel components of the present invention.

[0026] Figure 9 This is a three-dimensional structural diagram of the partition, placement groove, and drain valve components of the present invention.

[0027] Figure 10 This is a three-dimensional structural diagram of the guide rod, support rod, and sliding plate components of the present invention.

[0028] Figure 11 This is a schematic diagram of the planar structure of the sleeve, push rod, and sealing block of the present invention.

[0029] Figure 12 This is a three-dimensional structural diagram of the top rod, sealing plate, and buffer spring components of the present invention.

[0030] Figure 13 This is a three-dimensional structural diagram of the sealing plate, guide groove, and compression spring components of the present invention.

[0031] Figure 14 This is a schematic diagram of the flip door of the present invention in the open state.

[0032] In the attached diagrams: 1: Base frame; 101: Triangular bracket; 102: Flip-top door; 103: Door lock; 104: Ventilation slot; 105: Pneumatic strut; 106: Fixed guide plate; 107: Movable guide plate; 108: Inclined plate; 109: Drain pipe; 1010: Drain trough; 1011: Water collection port; 201: Support frame; 202: Gravity column; 203: Pulley; 204: Guide wheel; 205: Cleaning ring; 2 06: Pull rope, 207: Return spring, 301: Partition plate, 302: Placement groove, 303: Support net, 304: Drain valve, 305: Waterproof cover, 401: Guide rod, 402: Support rod, 403: Sliding plate, 404: Airbag, 405: Sleeve, 406: Top rod, 407: Sealing plate, 408: Guide groove, 409: Buffer spring, 4010: Sealing block, 4011: Compression spring. Detailed Implementation

[0033] References to embodiments herein mean that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] Example 1: A waterproof and moisture-proof cable branch box, such as Figures 1-8 and Figure 14As shown, the system includes a base frame 1, a triangular bracket 101, a flip-up door 102, a pneumatic strut 105, a fixed guide plate 106, a movable guide plate 107, an inclined plate 108, a drain pipe 109, a drain trough 1010, and cleaning components. The base frame 1 serves as the load-bearing base for the entire system, used for installation, fixation, and load support. A triangular bracket 101 is fixedly mounted at the center of the top of the base frame 1. The left and right ends of the triangular bracket 101 serve as the mounting and bearing surfaces for electrical components, providing stable support for various cable distribution components. Flip-up doors 102 are hinged to the left and right sides of the upper end of the triangular bracket 101. The inner walls of the flip-up doors 102 fit snugly against the left and right inclined surfaces of the triangular bracket 101. When both flip-up doors 102 are fully closed, the bottom surface of the flip-up door 102 is flush with the base frame 1. The top surface is tightly fitted, and the inner wall of the flip door 102 is tightly fitted with the two side walls of the triangular bracket 101, so that the left and right sides of the triangular bracket 101 enclose an independent and sealed chamber structure, forming a sealed housing space for electrical components. Sealing strips are affixed to the joints between the flip door 102 and the left and right end faces of the triangular bracket 101, as well as the top face of the bottom frame 1. Through the full-circumference sealing structure design, the airtightness of the housing cavity is achieved when the flip door 102 is closed, effectively preventing external rainwater, moisture, and dust from entering the housing, achieving highly efficient waterproof and moisture-proof protection. Each flip door 102 is independently matched with a pneumatic support rod 105. One end of the pneumatic support rod 105 is hinged to the inner wall of the triangular bracket 101, and the other end is hinged to the inner wall of the corresponding flip door 102. The movable support rods 105 are independently arranged and do not interfere with each other. Several ventilation slots 104, running through the interior and exterior, are equally spaced on both the front and rear side walls of the base frame 1. These ventilation slots 104 provide a constant ventilation and heat dissipation channel for the interior of the enclosure. The entire device is installed on top of a pre-set stone base on the ground surface. The stone base raises the overall installation height of the machine, effectively preventing ground water and rainwater from overflowing into the enclosure, forming the first physical waterproof protection structure. Fixed guide plates 106 are symmetrically fixed to the front and rear sides of the upper left and right side walls of the triangular bracket 101. Movable guide plates 107 are fixedly installed at corresponding positions on the front and rear of the top of the two side flip doors 102. When the flip doors 102 are closed, the movable guide plates 107 are precisely aligned and fit snugly with the corresponding fixed guide plates 106, together forming a neat and orderly interior structure. An airflow guiding structure enables directional airflow within the enclosure. Two V-shaped symmetrically arranged inclined plates 108 are fixedly installed on the upper inner side of each of the two flip doors 102. The inclined plates 108 are positioned below the fixed guide plate 106, and their inner ends are sealed to the outer wall of the triangular bracket 101. Drain pipes 109 are fixedly connected between the two inclined plates 108 on the same side to collect and drain condensate. Water collection inlets 1011 are formed along the length of the drain pipes 109, corresponding to the area above the inclined plates 108. A first airflow channel is formed between the outer side of the inclined plates 108 and the inner wall of the flip doors 102, and a second airflow channel is formed between the inclined plates 108 and the movable guide plate 107. These two airflow channels work together to create a directional heat flow path within the enclosure.Both sides of the flip-top door 102 have open drainage channels 1010 fixedly connected to their corresponding mounting positions with the drain pipes 109. The outer end of the drain pipe 109 penetrates the wall of the flip-top door 102 and communicates with the inner cavity of the drainage channel 1010, allowing collected condensate to be directed into the drainage channel 1010 for water vapor discharge. Both drain pipes 109 are arranged at a slight inclination towards the drainage channel 1010. Simultaneously, the bottom surface of the drainage channel 1010 adopts a sloping flow guiding structure design. Based on the principle of gravity flow, under the normal closed condition of the flip-top door 102, the water accumulated inside the drain pipe 109 can continuously flow towards the drainage channel 1010 along the inclination direction of the pipe. Furthermore, the water accumulated in the drainage channel 1010 can be quickly discharged outwards through its sloping bottom surface. The drain pipe 109 is equipped with a cleaning component for self-cleaning, ensuring long-term unobstructed drainage.

[0035] like Figures 7-8 As shown, the cleaning assembly includes a support frame 201, a gravity column 202, pulleys 203, guide wheels 204, a cleaning ring 205, a pull rope 206, and a return spring 207. The top of the drain pipe 109 is connected to the support frame 201. The gravity column 202 is slidably mounted inside the support frame 201. Pulleys 203 are rotatably mounted at both ends of the support frame 201. Guide wheels 204 are rotatably mounted at both ends of the top of the drain pipe 109. A cleaning ring 205 is slidably mounted in the area between the two guide wheels 204 inside the drain pipe 109. The outer wall of the cleaning ring 205 slides against the inner wall of the drain pipe 109, allowing it to conform to the pipe wall for thorough cleaning. A closed pull rope 206 is wound around the two pulleys 203 and the two guide wheels 204 on the same side. The pull rope 206 passes through the gravity column 205. The gravity column 202 is fixedly connected to the cleaning ring 205. In the initial state of the equipment, the gravity column 202 is located at the outer position of the support frame 201, and the cleaning ring 205 is located at the inner position of the drain pipe 109. A return spring 207 is connected between the inner end face of the gravity column 202 and the inner wall of the corresponding side support frame 201. The return spring 207 is sleeved on the outside of the pull rope 206 to realize the automatic reset of the gravity column 202 and the cleaning ring 205. The inner wall of the support frame 201 is coated with a polytetrafluoroethylene anti-friction coating, and the outer wall of the gravity column 202 is polished. The polytetrafluoroethylene coating and the polished surface cooperate to greatly reduce the frictional resistance when the gravity column 202 slides in the support frame 201, ensuring that the gravity column 202 can respond quickly and slide smoothly when the flip door 102 is opened, thereby improving the sensitivity and reliability of the cleaning component.

[0036] like Figures 1-2As shown, it also includes a door lock 103. Both sides of the flip door 102 are equipped with door locks 103 on their outer walls. The door lock 103 includes a lock seat fixed to the side wall of the bottom frame 1, a telescopic lock tongue, and a lock cylinder mechanism. When the flip door 102 is closed, the lock cylinder is rotated to drive the lock tongue to hook the lock seat, thereby achieving a tight and secure lock on the flip door 102. When unlocking, the lock cylinder is rotated in the opposite direction to disengage the lock tongue from the lock seat, thereby allowing the flip door 102 to flip upward and open. The outer ring of the door lock 103 is fitted with a waterproof sealing ring, which can effectively prevent outdoor rainwater and moisture from entering the lock body and the interior of the case, meeting the protection requirements of outdoor high and low temperature, rain and snow environments.

[0037] During installation, the entire branch box is first fixed to the top of a pre-set stone base on the outdoor ground surface via the base frame 1. The stone base elevates the installation position of the entire unit, mitigating the risk of ground water accumulation and rainwater backflow, thus creating the first line of defense against water damage. The base frame 1 serves as the load-bearing reference for the entire unit, with the triangular bracket 101 as the core load-bearing structure. Its left and right ends serve as installation positions for electrical components. The side cavities provide a sealed and stable installation and operating space for the components. After the electrical components are assembled, the two side flip doors 102 are closed by flipping them downwards along the hinges, ensuring a tight fit between the flip doors 102 and the base frame 1 and triangular bracket 101, forming a sealed cavity for the components. This is further enhanced by sealing strips at the joints to achieve a completely secure seal. The cover is sealed to prevent external moisture from entering, ensuring a dry and moisture-proof environment inside the chamber. During the closing process of the flip door 102, the independently deployed pneumatic support rods 105 move synchronously, reducing the closing speed of the flip door 102 through pneumatic buffering, avoiding structural deformation and component loosening and damage caused by rigid impact. Moreover, the left and right pneumatic support rods 105 work independently, ensuring the independence and stability of the opening and closing actions of the flip doors 102 on both sides. When opening the flip door 102 for routine maintenance, flip the flip door 102 upwards, and the pneumatic support rods 105 extend synchronously to provide opening assistance. It can also achieve hovering and positioning at any opening angle without the need for continuous manual support and fixation, greatly simplifying the outdoor maintenance and operation process and improving the convenience of operation.

[0038] Under normal operating conditions, the ventilation slots 104 evenly distributed on the front and rear sides of the bottom frame 1 enable normal convection between the inside and outside of the enclosure, meeting the heat dissipation and ventilation needs of the electrical components during continuous operation. At the same time, the fixed guide plate 106 and the movable guide plate 107 fit together to form a directional airflow guiding structure. After the heat generated by the components rises, it is diverted to both sides under the guiding effect of the inclined surface of the V-shaped inclined plate 108. It then flows through the double-layer airflow channels formed by the inclined plate 108 and the flip door 102, and the inclined plate 108 and the movable guide plate 107, and converges in a directional manner to the inner top surface of the flip door 102. This achieves orderly heat dissipation inside the enclosure, eliminates the problems of local heat accumulation and uneven heat dissipation, and ensures the stable operation of the electrical components.

[0039] When there is a significant temperature difference between the inside and outside of the cabinet, the hot and humid air that gathers on the inner top surface of the flip door 102 easily condenses into water vapor. This condensate drips downwards onto the surface of the inclined plate 108 under the influence of gravity, slides directionally down the inclined surface of the plate 108, and is collected in the drain pipe 109 via the water collection port 1011. Because the drain pipe 109 is arranged at a slight inclination towards the drain trough 1010, and the bottom surface of the drain trough 1010 is a sloping structure, the condensate flowing into the drain pipe 109 can automatically flow towards the drain under the influence of gravity. The drainage channel 1010 allows for rapid drainage to the outside of the enclosure through its opening structure. This achieves automatic collection, diversion, and external discharge of condensate throughout the process, preventing safety hazards such as water accumulation, dampness, component corrosion, and mold growth inside the enclosure. Meanwhile, the inclined plate 108 is installed inside the enclosure, eliminating the need for direct cooling from an external low-temperature cold source. The plate surface temperature is higher than the outer wall of the flip door 102, making condensation less likely. This effectively avoids the problem of condensation dripping and contaminating electrical components, ensuring the safe operation of the equipment.

[0040] When the equipment is opened for maintenance, the flip door 102 flips upward along the hinge, causing the inclined plate 108, drain pipe 109, and drain trough 1010 to flip simultaneously from a horizontal tilted state to a vertical state. The cleaning components are simultaneously triggered to perform automatic cleaning. The gravity column 202 slides downward along the support frame 201 under its own weight, compressing the return spring 207. At the same time, the pull rope 206 on the outside of the pulley 203 and guide wheel 204 moves synchronously, thereby causing the cleaning ring 205 to slide upward along the inner cavity of the drain pipe 109. Utilizing the gap sliding fit structure between the cleaning ring 205 and the inner wall of the drain pipe 109, scale, dirt, residual water and other impurities attached to the inner wall of the drain pipe 109 can be scraped and pushed. The impurities are pushed to the position of the drain trough 1010 and discharged outward, completing the automatic unblocking and cleaning operation of the inner wall of the drain pipe 109, effectively avoiding pipe blockage that affects drainage and moisture-proof performance. After the maintenance work is completed, the flip door 102 flips down and closes to reset. The drain pipe 109 and the support frame 201 simultaneously return to their initial tilted working state. The reset spring 207 releases its compression deformation and generates a reset elastic force, which pulls the gravity column 202 to slide back to the outside of the support frame 201. At the same time, the pull rope 206 pulls the cleaning ring 205 in the opposite direction to slide back along the inner wall of the drain pipe 109, so that the cleaning ring 205 returns to its initial standby position, completing a single automatic cleaning cycle. The opening and closing of the flip door 102 is linked to achieve periodic self-cleaning of the pipeline, continuously ensuring the smooth drainage of the drain pipe 109, and stably maintaining the long-term waterproof and moisture-proof performance of the equipment, greatly reducing the frequency and cost of outdoor maintenance.

[0041] Example 2: Based on Example 1, such as Figures 9-13As shown, it also includes a partition 301, a placement slot 302, a support mesh 303, a drain valve 304, a waterproof cover 305, and a self-sealing assembly. Partitions 301 are vertically welded to both the front and rear sides of the bottom frame 1. The gap between the partitions 301 and the side walls of the bottom frame 1 forms an independent ventilation channel. Placement slots 302 are integrally formed and connected to the upper outer sides of the partitions 301. A support mesh 303 is fixedly installed at the bottom of the placement slots 302. The placement slots 302 are entirely arranged within the ventilation channel area. The circulating air inside the ventilation channel must flow through the entire internal space of the placement slots 302 before entering the inner cavity of the bottom frame 1. The placement slots 302 are used to hold and place desiccant, dehumidifying and purifying the circulating air to continuously maintain a dry environment inside the cabinet. Two ventilation slots are located on the right side wall of the bottom frame 1. Each channel is embedded with a drain valve 304. The inner end of the drain valve 304 is connected to the inner cavity of the ventilation channel, and the outer end is connected to the outside atmosphere. This allows for the directional drainage of residual water and seepage inside the ventilation channel, preventing water from accumulating inside. The top of the ventilation slots 104 on the front and rear side walls of the bottom frame 1 is fixedly equipped with waterproof covers 305. The lateral width of the waterproof covers 305 is greater than the width of the ventilation slots 104, which can provide full coverage protection for the ventilation slots 104. In rainy conditions, this can effectively prevent rainwater and spray water from flowing directly into the box through the ventilation slots 104, forming the first waterproof barrier for the ventilation port. The ventilation channel is equipped with a self-sealing component that can automatically start, stop, and seal, achieving automatic closure protection of the ventilation channel in the event of water accumulation.

[0042] like Figures 9-13As shown, the self-sealing assembly includes a guide rod 401, a support rod 402, a sliding plate 403, an airbag 404, a sleeve 405, a top rod 406, a sealing plate 407, a guide groove 408, a buffer spring 409, a sealing block 4010, and a compression spring 4011. Multiple guide rods 401 are welded at equal intervals to the bottom of the ventilation channel inside the bottom frame 1. The top ends of the multiple guide rods 401 inside the same ventilation channel are all fixedly connected to a support rod 402. The end of the support rod 402 is connected to the outer side of the corresponding partition plate 301. The wall is fixedly connected to achieve stable support and positioning of the overall structure. Two sliding plates 403 are vertically slidably mounted between the guide rods 401 within the same ventilation channel. An airbag 404 is fixedly mounted between the two sliding plates 403 on the same side. The airbag 404 is sealed and slides through the corresponding guide rod 401, allowing it to float along the axial direction of the guide rod 401 with the water level, achieving overall lifting and lowering. Compression springs 4011 are sleeved on the outer side of each guide rod 401, with both ends of the compression springs 401 connected to the top of the upper sliding plate 403. Fixedly connected to the bottom of the support rod 402, several sleeves 405 are fixedly installed parallel to each other on the top of the upper sliding plate 403. The sleeves 405 slide vertically through the support rod 402 on the corresponding side. The top rods 406 are vertically slidably installed inside each sleeve 405. Sealing plates 407 are rotatably hinged to the corresponding positions on the outer wall of the partition plate 301 and above the ventilation channel. Under normal operating conditions, the sealing plates 407 maintain their initial inclined arrangement to ensure unobstructed ventilation in the ventilation channel. The inner walls of the front and rear sides of the bottom frame 1 and the corresponding sealing plates 407 are also fixedly installed. Sealing blocks 4010 are fixedly installed at the matching positions above 7. Guide grooves 408 are opened at the bottom of the sealing plate 407 corresponding to the positions of each push rod 406. The top of the push rod 406 and the corresponding guide groove 408 form a sliding fit structure. When the push rod 406 is raised and lowered vertically, it can slide relative to the guide groove 408 to realize the direction transmission of force. Buffer springs 409 are installed between the support rod 402 and the sleeve 405 on the corresponding side to buffer the rigid impact force during the upward pushing process of the push rod 406 and realize the flexible protection of the structure.

[0043] During normal and stable operation of the equipment, the partitions 301 on the front and rear sides of the bottom frame 1 and the side wall of the bottom frame 1 form two independent ventilation channels. Outside air enters the ventilation channel through the ventilation slot 104. The waterproof cover 305 installed on the top of the ventilation slot 104 can fully cover the slot body, effectively blocking direct and splashed rainwater during rainfall, and preventing water from directly invading the inside of the box. The airflow entering the ventilation channel must pass through the internal area of ​​the placement slot 302. The desiccant is stably supported by the support net 303 at the bottom of the placement slot 302. When the airflow flows through the desiccant layer, it completes the dehumidification and purification treatment. The dried air then flows into the inner cavity of the bottom frame 1, continuously optimizing the internal operating environment of the box and effectively inhibiting problems such as moisture, corrosion, condensation and mold growth of components.

[0044] When encountering severe conditions such as extreme rainstorms or sudden rises in ground water levels, where the ground water level exceeds the height of the raised stone base and floods up to the bottom frame 1 and enters the ventilation channel through the ventilation slot 104, the self-sealing component automatically senses and initiates a sealing and protection operation. The water entering the ventilation channel gradually rises in water level, and the buoyancy directly acts on the airbag 404. Driven by the buoyancy, the airbag 404 drives the upper and lower sliding plates 403 to slide vertically upwards synchronously along the guide rod 401, compressing the spring 4011 and thus compressing it. During the lifting process of the sliding plate 403, the sleeve 405 and the push rod 406 are moved upward as a whole. The top of the push rod 406 slides relative to the guide groove 408 at the bottom of the sealing plate 407. The vertical lifting force is converted into a horizontal rotational thrust through the inclined guide structure, driving the sealing plate 407 to flip upward around the hinge fulcrum. It gradually switches from the initial inclined conducting state to the horizontal sealing state until the top surface of the sealing plate 407 is tightly pressed and adhered to the corresponding sealing block 4010. At this time, the sealing plate 407 and the sealing block 4010 forms a closed barrier, blocking the flow path of the ventilation channel, preventing the water from spreading upwards, and preventing water from entering the placement slot 302 and the inner cavity of the bottom frame 1. It provides all-round protection for the electrical components inside the box. The volume of the airbag 404 is designed according to the cross-sectional area of ​​the ventilation channel to ensure that when the water level rises to the preset height, the buoyancy generated by the airbag 404 is sufficient to overcome the gravitational torque of the sealing plate 407, the elastic combined force of the compression spring 4011 and the buffer spring 409, and reliably push the sealing plate to the sealing position. In this embodiment, the airbag 404 is made of corrosion-resistant closed-cell foam or hollow rubber airbag, and the buoyancy margin is not less than twice the required thrust. During the process of the sleeve 405 being pushed upward with the sliding plate 403, the buffer spring 409 is compressed and undergoes elastic deformation, which can effectively absorb the impact load during the lifting process, avoid rigid collisions between the top rod 406, the sealing plate 407 and the guide groove 408, reduce structural wear and impact damage, and greatly improve the operational stability and service life of the self-sealing component.

[0045] As the external water recedes and the water level inside the ventilation channel continues to drop, the buoyancy of the airbag 404 gradually disappears, and the entire assembly loses its upward driving force. At this time, relying on the weight of the sealing plate 407 itself and the elastic restoring force of the compression spring 4011 and the buffer spring 409, all moving parts such as the sliding plate 403, sleeve 405, top rod 406, and airbag 404 are driven to reverse and reset. The sealing plate 407 falls back to its initial tilted state, the ventilation channel flow path is reopened, and the equipment resumes its normal ventilation and dehumidification function. The residual water at the bottom of the ventilation channel can be quickly discharged through the drain valve 304, eliminating the risk of water accumulation inside the channel and ensuring that the branch box can quickly return to normal operation after the water recedes, continuously maintaining excellent ventilation and waterproof and moisture-proof performance.

[0046] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the invention without departing from the principles and spirit of the invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for illustrative purposes only and is not intended to limit the invention; rather, the scope of protection is defined by the content of the claims.

Claims

1. A waterproof and moisture-proof cable branch box, comprising a bottom frame (1), a triangular bracket (101), a flip-top door (102), and a pneumatic support rod (105), wherein the triangular bracket (101) is mounted at the center of the top of the bottom frame (1), the two ends of the triangular bracket (101) are the mounting and bearing surfaces for electrical components, and the flip-top door (102) is hinged to both sides of the upper end of the triangular bracket (101) by hinges. The inner sidewall of the flip-top door (102) fits snugly against the two inclined surfaces of the triangular bracket (101). Each flip-top door (102) is independently matched with a pneumatic support rod (105), one end of the pneumatic support rod (105) is hinged to the inner sidewall of the triangular bracket (101), and the other end is hinged to the inner sidewall of the corresponding flip-top door (102). Several ventilation slots (104) are equally spaced on both sides of the bottom frame (1). It also includes a fixed guide plate (106), a movable guide plate (107), an inclined plate (108), a drain pipe (109), a drain trough (1010), and cleaning components. Fixed guide plates (106) are symmetrically installed on both sides of the upper part of the triangular bracket (101). Movable guide plates (107) are installed at corresponding positions on the top of the flip doors (102) on both sides. The movable guide plates (107) fit snugly with the corresponding fixed guide plates (106). Two V-shaped symmetrical guide plates are installed on the upper side of the flip doors (102) on both sides. The inclined plate (108) of the cloth is connected to the drain pipe (109) between the two inclined plates (108) on the same side. The drain pipe (109) has a water collection port (1011) in the area above the inclined plate (108) on the pipe wall. The outer wall of the flip door (102) on both sides is connected to the drain pipe (109) at the corresponding assembly position. The outer end of the drain pipe (109) penetrates the wall of the flip door (102) and communicates with the inner cavity of the drain pipe (1010). The drain pipe (109) is equipped with a cleaning component.

2. A waterproof and moisture-proof cable branch box according to claim 1, characterized in that: Both drainage pipes (109) are laid at a slight inclination toward the drainage trough (1010), and the bottom surface of the drainage trough (1010) adopts a sloping flow guiding structure design.

3. A waterproof and moisture-proof cable branch box according to claim 2, characterized in that: Sealing strips are affixed to the joints of the flip door (102) and the triangular bracket (101) at both ends and the top of the bottom frame (1).

4. A waterproof and moisture-proof cable branch box according to claim 3, characterized in that: The cleaning components include a support frame (201), a gravity column (202), a pulley (203), a guide wheel (204), a cleaning ring (205), a pull rope (206), and a return spring (207). The top of each drain pipe (109) is connected to the support frame (201). The gravity column (202) is slidably mounted inside each support frame (201). Both ends of the support frame (201) are rotatably mounted with pulleys (203). Both ends of the top of each drain pipe (109) are rotatably mounted with guide wheels (204). The drain pipe (109)... The area between the two guide wheels (204) inside the wall is fitted with a cleaning ring (205). The outer wall of the cleaning ring (205) is in sliding fit with the inner wall of the drain pipe (109). A closed pull rope (206) is wound around the two pulleys (203) and the two guide wheels (204) on the same side. The pull rope (206) passes through the gravity column (202) and the cleaning ring (205) and is connected to them. A return spring (207) is connected between the inner end face of the gravity column (202) and the inner wall of the corresponding side support frame (201).

5. A waterproof and moisture-proof cable branch box according to claim 4, characterized in that: The inner wall of the support frame (201) is coated with a polytetrafluoroethylene anti-friction coating, and the outer wall of the gravity column (202) is polished.

6. A waterproof and moisture-proof cable branch box according to claim 5, characterized in that: It also includes a door lock (103), and the outer walls of both flip doors (102) are equipped with door locks (103). The door lock (103) includes a lock seat fixed to the side wall of the bottom frame (1), a retractable lock tongue and a lock cylinder mechanism.

7. A waterproof and moisture-proof cable branch box according to claim 6, characterized in that: It also includes a partition (301), a placement slot (302), a support net (303), a drain valve (304), a waterproof cover (305), and a self-sealing component. The partition (301) is installed on both sides of the bottom frame (1). The gap between the partition (301) and the side wall of the bottom frame (1) forms a ventilation channel. The upper outer side of the partition (301) is connected to the placement slot (302). The bottom of the placement slot (302) is equipped with a support net (303). The placement slot (302) is used to hold the desiccant. The right side wall of the bottom frame (1) is embedded with a drain valve (304) at the position corresponding to the two ventilation channels. The top of the ventilation slot (104) is equipped with a waterproof cover (305). The ventilation channel is equipped with a self-sealing component.

8. A waterproof and moisture-proof cable branch box according to claim 7, characterized in that: The self-sealing assembly includes a guide rod (401), a support rod (402), a sliding plate (403), an airbag (404), a sleeve (405), a top rod (406), a sealing plate (407), a guide groove (408), a buffer spring (409), a sealing block (4010), and a compression spring (4011). Multiple guide rods (401) are evenly spaced at the bottom of the ventilation channel inside the bottom frame (1). The top ends of multiple guide rods (401) within the same ventilation channel are all fixedly connected to a support rod (402). The end of the support rod (402) is fixedly connected to the outer wall of the corresponding partition plate (301). Two sliding plates (403) are slidably fitted between the guide rods (401) within the same ventilation channel. An airbag (404) is fixedly fitted between the two sliding plates (403) on the same side. A sleeve is fitted on the outside of each guide rod (401). Compression spring (4011) is connected at both ends to the top of upper sliding plate (403) and the bottom of support rod (402) respectively. Several sleeves (405) are fixedly installed at intervals on the top of upper sliding plate (403). Top rods (406) are vertically slidably installed inside sleeves (405). Sealing plates (407) are rotatably hinged on the outer side wall of partition (301) and the corresponding position above the ventilation channel. Sealing blocks (4010) are installed on the inner side walls of bottom frame (1) and the matching position above the corresponding sealing plate (407). Guide grooves (408) are opened at the bottom of sealing plate (407) corresponding to the position of each top rod (406). The top of top rod (406) and the corresponding guide groove (408) form a sliding adaptation structure. Buffer springs (409) are installed between support rod (402) and sleeves (405) on the corresponding side.

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