A waterproof and heat dissipation integrated cable branch box body structure

Abstract

This invention discloses a waterproof and heat-dissipating integrated cable branch box structure, relating to the field of cable branch boxes. It includes a supporting base, a waterproof base fixedly installed on the upper surface of the supporting base, and a branch box fixedly installed on the upper surface of the waterproof base. An opening is provided in the center of the front face of the branch box, and a door is rotatably installed on the side of the front face of the branch box near the opening via a bearing. Several heat dissipation holes are provided through the bottom of both sides of the branch box. The waterproof mechanism solves the problem of backflow into the bottom of existing branch boxes. When water accumulates outdoors, a hollow float, driven by buoyancy, causes the connecting frame and waterproof cloth to rise synchronously. The folded waterproof cloth unfolds to form a ring-shaped waterproof barrier around the bottom of the branch box, preventing water from flowing back to the bottom of the box. The drainage holes can promptly drain small amounts of water from the fixed inner groove, preventing the waterproof cloth from aging due to long-term soaking, improving waterproof reliability, reducing component failures caused by rainwater immersion, and lowering the maintenance frequency.

Description

Technical Field

[0001] This invention relates to cable branch box technology, specifically to a waterproof and heat-dissipating integrated cable branch box structure. Background Technology

[0002] Cable distribution boxes are key equipment in power distribution systems for cable branching, transfer, and protection of core components. They mainly consist of an outer casing, internal insulating supports, cable connection terminals, protective electrical devices (such as surge arresters and fuses), and wiring components. Their core function is to efficiently distribute the power of the main cable to multiple branch cables, while providing physical isolation and insulation protection for internal components to prevent interference from the external environment to the cable connection nodes. In addition, they need to facilitate line maintenance, fault diagnosis, and capacity adjustment by operation and maintenance personnel. They are widely used in urban residential areas, industrial parks, municipal roads, and remote transformer substations, and are a core component in ensuring the reliability of power supply in medium and low voltage distribution systems.

[0003] However, existing cable distribution boxes generally have limited waterproofing design when used outdoors, making them unsuitable for severe weather conditions such as heavy rain and typhoons, seriously affecting the normal operation of the equipment. Most existing boxes use a "flat roof + simple rainproof eaves" design. The top structure, combined with the rubber sealing strips at the joints of the enclosure, provides basic waterproofing. However, during heavy rainfall, rainwater tends to concentrate at the top edge of the enclosure. If the sealing strips are damaged due to long-term outdoor aging, UV exposure, or gaps in the installation, rainwater can seep into the enclosure through these gaps. Furthermore, in outdoor installation scenarios (such as low-lying areas or areas prone to flooding during the rainy season), continuous rainfall can lead to water accumulation on the ground. The bottom of most existing enclosures is a flat structure and lacks anti-backflow design. When the water level exceeds the cable entry / exit holes or joints at the bottom of the enclosure, rainwater can backflow into the enclosure through these weak points. In addition, some enclosures lack dedicated drainage channels, preventing the timely discharge of seeping or backflowing rainwater. This can lead to water accumulation inside the enclosure, directly soaking core components such as cable connection terminals and protective electrical appliances, causing a decline in the insulation performance of components, corrosion of metal parts, and in severe cases, short circuits. This not only requires frequent shutdowns for maintenance but also interrupts the power supply continuity of the distribution network, severely restricting the long-term stable use of cable branch boxes in outdoor environments. Summary of the Invention

[0004] The purpose of this invention is to provide a waterproof and heat-dissipating integrated cable branch box structure to solve the problem of cable branch boxes being soaked by outdoor rainwater in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a waterproof and heat-dissipating integrated cable branch box structure, including a support base, a waterproof base fixedly installed on the upper surface of the support base, and a branch box fixedly installed on the upper surface of the waterproof base;

[0006] The branch box has an opening in the middle of the front face. A door is rotatably installed on the side of the front face of the branch box near the opening via a bearing. Several heat dissipation holes are opened through the bottom of both sides of the branch box. The waterproof base is equipped with a waterproof mechanism to protect the bottom of the branch box.

[0007] The waterproof mechanism includes a fixed inner groove, which is opened at the edge of the upper surface of the waterproof base. A waterproof cloth is fused to the bottom of the inner wall of the fixed inner groove. A connecting frame is fixedly installed on the top of the waterproof cloth extending to the outside of the waterproof base. Several hollow floats are fixedly installed in the middle of the outer surface of the connecting frame.

[0008] A fixed inner cavity is provided in the middle of the waterproof base, and a heat dissipation structure is provided between the waterproof base and the branch box to dissipate heat and cool the inside of the branch box.

[0009] Furthermore, the heat dissipation structure includes an equipment mounting section, which is located at the middle position of the junction of the waterproof base and the branch box. A cooling fan is installed inside the equipment mounting section, and a drive unit is provided at the middle of one end of the cooling fan. Ventilation pipes are fixedly installed on the inner wall of the branch box near the four corners. The bottom of the ventilation pipe extends into the fixed inner cavity and is fixedly connected to a wide mask. The top of the ventilation pipe extends into the outside of the branch box and is fixedly installed with a heat dissipation opening.

[0010] Furthermore, the bottom of one side of the ventilation duct extends to the middle of the fixed inner cavity, and the opening on one side of the wide-face mask is near the bottom of the cooling fan.

[0011] Furthermore, the heat dissipation opening is inclinedly disposed at the top of the outer surface of the branch box, with one side of the heat dissipation opening facing downwards.

[0012] Furthermore, the bottom of the outer surface of the waterproof base extends into the fixed inner groove and has several drainage holes for draining water from the fixed inner groove.

[0013] Furthermore, the waterproof fabric has a folded cross-section, with the top of the waterproof fabric located at the top opening of the fixed inner groove, and the fixed inner groove and the waterproof fabric are mutually compatible.

[0014] Furthermore, the connecting frame is a square hollow frame structure, and the connecting frame is movably disposed on the outer surface of the branch box, with the branch box and the connecting frame interlocking with each other.

[0015] Compared with the prior art, the waterproof and heat-dissipating integrated cable branch box structure provided by the present invention has the following beneficial effects:

[0016] 1. This invention solves the problem of backflow at the bottom of existing branch boxes by using a waterproof mechanism of "float drive + folded waterproof cloth". When there is water accumulation outdoors, the hollow float is driven by buoyancy to rise synchronously with the connecting frame and the waterproof cloth. The folded waterproof cloth unfolds to form a ring-shaped waterproof barrier around the bottom of the branch box, preventing water from flowing back to the bottom of the box. After the water recedes, the buoyancy of the float disappears, and the connecting frame and the waterproof cloth descend under the action of gravity. The waterproof cloth retracts into the fixed inner groove, without affecting the normal operation and maintenance of the equipment. The drain hole can drain the small amount of water in the fixed inner groove in time, avoiding long-term soaking and aging of the waterproof cloth, improving waterproof reliability, reducing component failures caused by rainwater soaking, and reducing maintenance frequency.

[0017] 2. This invention achieves efficient heat dissipation and rainwater infiltration prevention through a heat dissipation structure of "heat dissipation fan + directional ventilation pipe + inclined opening". The heat dissipation fan drives airflow, and the wide mask increases the intake area of ​​cold air. The cold air is transported to the inside of the branch box through the ventilation pipe. After mixing with the hot air generated by the components, it is discharged from the inclined heat dissipation opening at the top. The heat dissipation opening faces downward, which can completely prevent rainwater from falling into the ventilation pipe. The ventilation pipe is distributed at the four corners of the box to ensure that the airflow evenly covers the internal space. Compared with the existing method of relying solely on natural heat dissipation through heat dissipation holes, this invention significantly improves heat dissipation efficiency, avoids the aging of internal components due to high temperature, and extends the service life.

[0018] 3. This invention improves the outdoor adaptability and maintenance efficiency of the equipment through "integrated waterproof and heat dissipation design". The waterproof mechanism and heat dissipation structure are integrated in the same box frame, eliminating the need for additional waterproof covers or external heat dissipation devices, thus reducing the overall size and installation cost of the equipment. The materials and fixing methods of the support base, waterproof base, and branch box are adapted to harsh outdoor environments, with strong corrosion resistance and impact resistance. The waterproof cloth, heat dissipation fan and other components are all modularly designed, allowing maintenance personnel to quickly disassemble and replace them without disassembling the overall structure, greatly shortening maintenance time and further improving the outdoor operation stability and overall efficiency of the cable branch box. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the waterproof fabric structure provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the ventilation duct provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the waterproof base provided in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of a mask structure provided in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of a cooling fan structure provided in an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Support base; 2. Waterproof base; 3. Branch box; 4. Box opening; 5. Box door; 6. Heat dissipation hole; 7. Fixing inner groove; 8. Waterproof cloth; 9. Connecting frame; 10. Hollow float; 11. Drainage hole; 12. Fixing inner cavity; 13. Equipment installation part; 14. Cooling fan; 15. Ventilation pipe; 16. Wide mask; 17. Heat dissipation opening. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] As attached Figure 1 To be continued Figure 6 As shown:

[0030] Example 1:

[0031] The present invention provides a waterproof and heat dissipation integrated cable branch box structure, including a support base 1, a waterproof base 2 fixedly installed on the upper surface of the support base 1, and a branch box 3 fixedly installed on the upper surface of the waterproof base 2.

[0032] The front end face of the branch box 3 has an opening 4 in the middle. The front end face of the branch box 3 is equipped with a door 5 which is rotatably installed on the side of the opening 4 via a bearing. Several heat dissipation holes 6 are opened through the bottom of both sides of the branch box 3. The waterproof base 2 is equipped with a waterproof mechanism to protect the bottom of the branch box 3.

[0033] The waterproof mechanism includes a fixed inner groove 7, which is located at the edge of the upper surface of the waterproof base 2. A waterproof cloth 8 is welded to the bottom of the inner wall of the fixed inner groove 7. The waterproof cloth 8 has a folded cross-section. The top of the waterproof cloth 8 is located at the top opening of the fixed inner groove 7. The fixed inner groove 7 and the waterproof cloth 8 are mutually compatible. A connecting frame 9 is fixedly installed on the outside of the waterproof base 2. The connecting frame 9 is a square hollow frame structure. The connecting frame 9 is movably set on the outer surface of the branch box 3. The branch box 3 and the connecting frame 9 are interlocked. Several hollow floats 10 are fixedly installed in the middle of the outer surface of the connecting frame 9.

[0034] The bottom of the outer surface of the waterproof base 2 extends into the fixed inner groove 7 and has several drainage holes 11 for draining the water accumulated in the fixed inner groove 7.

[0035] A fixed inner cavity 12 is provided in the middle of the waterproof base 2. A heat dissipation structure is also provided between the waterproof base 2 and the branch box 3 to dissipate heat and cool the inside of the branch box 3.

[0036] Working principle: First, the staff assembles the overall frame and waterproof mechanism to lay the foundation for outdoor use. The staff first fixes the support base 1 to the outdoor installation location (such as a concrete pit in a low-lying area) and adjusts it to a level state using a level to ensure that the waterproof base 2 will not tilt after installation. Then, the waterproof base 2 is fixed to the upper surface of the support base 1 with expansion bolts. At this time, the fixing inner groove 7 on the upper surface of the waterproof base 2 surrounds the installation area of ​​the branch box 3. Then, the branch box 3 is welded to the upper surface of the waterproof base 2, and the weld seam is sealed with sealant to prevent rainwater from seeping in from the weld. Finally, the waterproof mechanism is assembled: the bottom end of the folded waterproof cloth 8 is fused to the inner wall of the fixing inner groove 7, and the top is fixed to the connecting frame 9. Then, the hollow float ball 10 is evenly fixed on the outer surface of the connecting frame 9. The connecting frame 9 is movably fitted onto the outer surface of the branch box 3. Because the connecting frame 9 and the branch box 3 are interlocked, the connecting frame 9 can be smoothly raised and lowered along the axial direction of the box without the risk of displacement. During the pull test, the waterproof cloth 8 can be smoothly unfolded and retracted to ensure structural compatibility.

[0037] Next, the staff implemented an automatic backflow prevention mechanism to prevent water accumulation. When heavy rain occurs outdoors and the water level gradually rises to near the upper surface of the waterproof base 2, the hollow float 10 outside the connecting frame 9 is buoyed and moves the connecting frame 9 upward along the branch box 3. Simultaneously, the connecting frame 9 pulls the waterproof cloth 8 out of the fixed inner groove 7, and the folded structure gradually extends to form a ring-shaped waterproof barrier around the bottom of the branch box 3. After the bottom of the waterproof cloth 8 contacts the ground, it prevents water from spreading to the bottom of the branch box 3 and avoids backflow of water through the heat dissipation holes 6 or the gaps at the bottom of the box. If a small amount of rainwater seeps into the fixed inner groove 7, it will be quickly discharged through the drainage holes 11 at the bottom of the waterproof base 2, preventing the waterproof cloth 8 from being soaked in water for a long time, slowing down the aging process, and ensuring the long-term reliability of the waterproof cloth 8.

[0038] Then, after the water recedes, the staff resets and maintains the waterproofing mechanism. When the rainy season ends and the water gradually recedes, the buoyancy of the hollow float 10 disappears, and the connecting frame 9 moves downward along the branch box 3 under its own weight. The waterproof cloth 8 is then folded back into the fixed inner groove 7 to prevent the waterproof cloth 8 from being exposed to ultraviolet rays outdoors for a long time. The staff regularly checks the fixed inner groove 7. If there is mud or sand accumulation, clean water is injected through the drain hole 11 to rinse it. At the same time, the staff checks whether there is any damage at the welded joints of the waterproof cloth 8. If there is any local damage, it is repaired with waterproof tape to ensure that the waterproofing effect is not affected when there is water accumulation next time. During this process, the heat dissipation holes 6 on both sides of the branch box 3 are always kept unobstructed, so as not to affect the use of the subsequent heat dissipation structure and achieve the installation compatibility of the "waterproof and heat dissipation structure".

[0039] Finally, through the collaboration between the waterproof mechanism and the branch box 3, the staff ensures the safety of the internal components. When there is no water accumulation outdoors, the waterproof cloth 8 is stored in the fixed inner groove 7 without occupying extra space. Maintenance personnel can open the box door 5 normally to inspect the internal components (such as cable terminals and surge arresters) of the branch box 3. When there is a sudden rain and water accumulation, the waterproof mechanism can automatically respond to form a waterproof barrier without manual intervention, avoiding the need for staff to handle emergency situations in the rain, reducing maintenance costs, and preventing water from soaking the internal components, which would lead to a decrease in insulation performance, reducing the risk of short circuit faults, and ensuring the stable operation of the cable branch box in harsh outdoor environments.

[0040] Example 2:

[0041] This embodiment is basically the same as the previous embodiment, except that the heat dissipation structure includes a device mounting part 13, which is located at the middle position of the junction of the waterproof base 2 and the branch box 3. A heat dissipation fan 14 is installed inside the device mounting part 13. A drive part is provided at the middle of one end of the heat dissipation fan 14. Ventilation pipes 15 are fixedly installed on the inner wall of the branch box 3 near the four corners. The bottom of the ventilation pipe 15 extends into the fixed inner cavity 12 and is fixedly connected to a wide mask 16. The top of the ventilation pipe 15 extends into the outside of the branch box 3 and is fixedly installed with a heat dissipation opening 17.

[0042] The bottom of one side of the ventilation duct 15 extends to the middle of the fixed inner cavity 12, and the opening on one side of the wide mask 16 is close to the bottom of the cooling fan 14.

[0043] The heat dissipation opening 17 is inclinedly set at the top of the outer surface of the branch box 3, with one side of the heat dissipation opening 17 facing downward.

[0044] Working principle: First, the staff completes the coordinated assembly of the heat dissipation structure and waterproof mechanism to ensure the compatibility of the dual functions of "waterproof + heat dissipation". Based on the first embodiment, the staff first fixes the equipment installation part 13 at the junction of the waterproof base 2 and the branch box 3, installs the cooling fan 14 inside the equipment installation part 13, and connects the drive wire (connected to the power distribution module inside the branch box 3); then, the four ventilation pipes 15 are welded to the four corners of the inner wall of the branch box 3 respectively, the bottom of the ventilation pipes 15 extends to the fixed inner cavity 12, and the end is fixed to the wide mask 16. The opening of the wide mask 16 is adjusted to face the lower part of the cooling fan 14 to increase the cold air intake area; finally, the top of the ventilation pipe 15 is bent and extended to the outside of the branch box 3 and a heat dissipation opening 17 is installed, ensuring that the heat dissipation opening 17 is tilted downward (at 30-45° with the horizontal direction) to prevent rainwater from falling into the ventilation pipe 15; after assembly, the rotation of the cooling fan 14 is tested to confirm that the airflow is drawn in from the bottom and discharged from the top, without reverse rotation, ensuring that the heat dissipation direction is correct;

[0045] Next, the staff activated the heat dissipation structure to achieve efficient cooling at high temperatures, while also ensuring waterproofing. In summer, when outdoor temperatures rise (e.g., ambient temperatures above 35°C), the internal components of branch box 3 generate heat, causing the internal temperature to rise above 40°C. The staff then activated the cooling fan 14 drive unit via the remote control system. The cooling fan 14 rotates at high speed, creating negative pressure inside the fixed inner cavity 12. External cold air is rapidly drawn in through the wide-face mask 16 (the wide-face mask 16's horn-shaped structure doubles the air intake area, increasing the airflow). The cold air is then transported upwards along the ventilation duct 15. The air is delivered to the inside of the branch box 3 and diffuses evenly through the openings on the side wall of the ventilation duct 15, mixing thoroughly with the hot air generated by components such as cable terminals and protective electrical devices. Due to the low density of hot air, it flows upward under the action of buoyancy and is finally discharged from the heat dissipation opening 17 at the top of the branch box 3. The heat dissipation opening 17 is designed to face downwards, which can prevent rainwater from entering even when it rains. At the same time, four ventilation ducts 15 are distributed at the four corners of the box to ensure that the airflow covers the entire inside of the box without any heat dissipation dead corners. Compared with the existing method of relying solely on the heat dissipation holes 6 for natural heat dissipation, this method can quickly reduce the temperature inside the box and prevent components from aging due to high temperatures.

[0046] Then, the staff uses the heat dissipation structure and waterproof mechanism in synergy to cope with complex outdoor environments. When the heat dissipation structure is in operation, if there is a sudden rain, the waterproof mechanism will play a role simultaneously. When the water rises, the hollow float ball 10 will drive the waterproof cloth 8 to unfold to prevent backflow. The heat dissipation opening 17 faces downward to prevent rainwater from seeping into the ventilation pipe 15. The two do not interfere with each other. A small amount of water in the fixed inner groove 7 is discharged through the drain hole 11 without affecting the operation of the heat dissipation fan 14 in the fixed inner cavity 12. When the staff performs regular maintenance, they first turn off the power of the heat dissipation fan 14, open the box door 5 and use compressed air to clean the dust in the ventilation pipe 15 (to prevent the pipe from being blocked and affecting the airflow), check whether the wide mask 16 is damaged (if damaged, replace it to ensure air intake efficiency), and at the same time check whether there are foreign objects on the fan blades of the heat dissipation fan 14 to ensure the long-term stable operation of the heat dissipation structure.

[0047] Finally, the staff improved the efficiency of outdoor use through the integrated design of "waterproof + heat dissipation". This structure does not require additional external heat dissipation devices or waterproof covers, reducing the size of the equipment and installation costs. During operation and maintenance, only the waterproof cloth 8 and the heat dissipation fan 14 need to be maintained separately, without disassembling the overall frame. For example, when replacing the waterproof cloth 8, only the connecting frame 9 needs to be removed, and when replacing the heat dissipation fan 14, only the equipment installation part 13 needs to be opened. The operation is convenient and the maintenance time is greatly shortened. This ensures that the cable branch box can be protected from rainwater immersion and can dissipate heat efficiently in the hot and rainy outdoor environment, ensuring the long-term stable operation of the internal components.

[0048] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A waterproof and heat-dissipating integrated cable branch box structure, comprising a supporting base (1), characterized in that, A waterproof base (2) is fixedly installed on the upper surface of the support base (1), and a branch box (3) is fixedly installed on the upper surface of the waterproof base (2). The branch box (3) has a box opening (4) in the middle of the front end face. The side of the front end face of the branch box (3) near the box opening (4) is equipped with a box door (5) which is rotatably installed by a bearing. Several heat dissipation holes (6) are opened through the bottom of both sides of the branch box (3). The waterproof base (2) is equipped with a waterproof mechanism to protect the bottom of the branch box (3). The waterproof mechanism includes a fixed inner groove (7), which is located at the edge of the upper surface of the waterproof base (2). A waterproof cloth (8) is welded to the bottom of the inner wall of the fixed inner groove (7). A connecting frame (9) is fixedly installed on the top of the waterproof cloth (8) to the outside of the waterproof base (2). Several hollow floats (10) are fixedly installed on the middle of the outer surface of the connecting frame (9). A fixed inner cavity (12) is provided in the middle of the waterproof base (2). A heat dissipation structure is also provided between the waterproof base (2) and the branch box (3) for heat dissipation and cooling of the inside of the branch box (3).

2. The waterproof and heat-dissipating integrated cable branch box structure according to claim 1, characterized in that, The heat dissipation structure includes an equipment mounting part (13), which is located at the middle position of the junction of the waterproof base (2) and the branch box (3). A cooling fan (14) is installed inside the equipment mounting part (13). A drive unit is provided at the middle of one end of the cooling fan (14). Ventilation pipes (15) are fixedly installed on the inner wall of the branch box (3) near the four corners. The bottom of the ventilation pipe (15) extends to the inside of the fixed inner cavity (12) and is fixedly connected to a wide mask (16). The top of the ventilation pipe (15) extends to the outside of the branch box (3) and is fixedly installed with a heat dissipation opening (17).

3. The waterproof and heat-dissipating integrated cable branch box structure according to claim 2, characterized in that, The bottom of one side of the ventilation pipe (15) extends to the middle of the fixed inner cavity (12), and the opening of one side of the wide mask (16) is close to the bottom of the heat dissipation fan (14).

4. The waterproof and heat-dissipating integrated cable branch box structure according to claim 2, characterized in that, The heat dissipation opening (17) is inclinedly disposed at the top of the outer surface of the branch box (3), with one side of the heat dissipation opening (17) facing downward.

5. The waterproof and heat-dissipating integrated cable branch box structure according to claim 1, characterized in that, The bottom of the outer surface of the waterproof base (2) extends into the fixed inner groove (7) and has several drainage holes (11) for draining water from the fixed inner groove (7).

6. The waterproof and heat-dissipating integrated cable branch box structure according to claim 1, characterized in that, The waterproof cloth (8) has a folded cross-section, and the top of the waterproof cloth (8) is located at the top opening of the fixed inner groove (7). The fixed inner groove (7) and the waterproof cloth (8) are compatible with each other.

7. The waterproof and heat-dissipating integrated cable branch box structure according to claim 1, characterized in that, The connecting frame (9) is a square hollow frame structure. The connecting frame (9) is movably set on the outer surface of the branch box (3). The branch box (3) and the connecting frame (9) are interlocked.

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