A cable branch box with high heat dissipation efficiency

Abstract

This application relates to the technical field of electrical equipment and discloses a high-efficiency heat dissipation cable distribution box, which includes a box body, electrical components disposed in the box body, and cables connecting the electrical components. The box body includes a door, side panels, and a bottom plate. Ventilation holes are provided on the side panels, and a cleaning plate is slidably disposed on the wall of each ventilation hole. A driving assembly is provided inside the box body to drive the cleaning plate to slide. The cable distribution box of this application realizes the self-cleaning function of the ventilation holes, fundamentally solving the problem of reduced heat dissipation performance caused by dust accumulation, ensuring continuous and efficient heat dissipation of the cable distribution box under high load operation, and effectively controlling the temperature rise inside the box.

Description

Technical Field

[0001] This application relates to the technical field of electrical equipment, and in particular to a cable branch box with high-efficiency heat dissipation. Background Technology

[0002] Cable distribution boxes are critical node devices in power distribution networks, serving as junction boxes or hubs. In the distribution system, they bear the core function of power distribution and transfer, typically installed in the middle or end of outdoor cable lines. Their main function is to safely and reliably distribute power from a main cable from a substation or the upstream distribution network to multiple branch cables serving different users, areas, or equipment, thereby expanding the power supply range and optimizing the network structure. This equipment is widely used in distribution networks for urban residential areas, industrial parks, street lighting, and various infrastructures, significantly improving the flexibility, scalability, and reliability of the distribution system. It is an indispensable infrastructure in modern distribution automation and grid-based power supply models.

[0003] In related technologies, the commonly seen cable distribution box mainly consists of three parts: the box body, internal electrical components, and connecting cables. The box body is mostly made of stainless steel or composite insulation materials, possessing a certain level of waterproof, dustproof, and mechanical protection. The internal electrical components are the core of the functionality, typically including busbars for power collection and distribution, dedicated pluggable insulated connectors for cable connections, and optional load switches, circuit breakers, surge arresters, fault indicators, etc., depending on functional requirements. All components are electrically connected via insulated wires or copper busbars, forming a complete power distribution unit.

[0004] Although existing technology can meet basic power distribution functions, a significant technical deficiency has been exposed in actual operation: heat dissipation is becoming increasingly prominent. Cable distribution boxes need to integrate and connect multiple branch cables, and they are densely equipped with various electrical components such as load switches and circuit breakers. These devices generate Joule heat when carrying normal current. Under high load or continuous operation conditions in summer, heat accumulates continuously within the sealed box, easily leading to a sustained increase in internal ambient temperature. Excessive operating temperature not only accelerates the aging of insulation in electrical components and connecting cables, affecting their performance and lifespan, but in severe cases, it can also cause overheating and oxidation of electrical connection points, increased contact resistance, and even localized burnout or short-circuit faults, directly threatening the safe and stable operation of the power distribution system. Although existing boxes have ventilation holes, these holes are easily blocked by dust and other debris over long-term use, resulting in poor heat dissipation. Therefore, how to optimize the heat dissipation structure and effectively control the temperature rise inside the box has become a key technical issue that urgently needs improvement in the design and application of current cable distribution boxes. Summary of the Invention

[0005] In order to improve the heat dissipation performance of cable distribution boxes and ensure the reliability of electrical components inside the boxes during long-term operation, this application provides a cable distribution box with high-efficiency heat dissipation.

[0006] The high-efficiency heat dissipation cable distribution box provided in this application adopts the following technical solution: A high-efficiency heat dissipation cable distribution box includes a box body, electrical components disposed in the box body, and cables connecting the electrical components. The box body includes a door, side panels, and a bottom plate. Ventilation holes are provided on the side panels. A cleaning plate is slidably disposed on the wall of each ventilation hole. A drive assembly is provided inside the box body for driving the cleaning plate to slide.

[0007] By adopting the above technical solution, when the ventilation holes are partially blocked by dust, catkins, and other debris due to long-term use, the drive component can drive the cleaning plate to slide along the hole wall, thereby scraping or pushing away the blockages attached to the inner wall of the ventilation hole and restoring the effective ventilation area of ​​the ventilation hole. This structure realizes the self-cleaning function of the ventilation holes, fundamentally solving the problem of reduced heat dissipation performance caused by dust accumulation, ensuring continuous and efficient heat dissipation of the cable branch box under high load operation, and effectively controlling the temperature rise inside the box.

[0008] Optionally, the driving assembly includes a temperature sensing box, a connecting tube connected to the temperature sensing box, and a shrink tube disposed at the end of the connecting tube away from the temperature sensing box. The connecting tube connects the temperature sensing box and the shrink tube. A driving rod is provided on the shrink tube. A mounting rod is connected to each of the cleaning plates. A clearance groove is provided on the mounting rod. A sliding block is slidably disposed in the clearance groove. A guide slope is provided on the sliding block. The guide slope is used to guide the sliding block into the clearance groove. A connecting spring is provided on the sliding block. The connecting spring has a tendency to drive the sliding block out of the clearance groove. The driving rod abuts against the guide slope. The temperature sensing box is filled with nitrogen. A return spring is provided on the mounting rod. The return spring has a tendency to drive the mounting rod to move away from the opening of the ventilation hole.

[0009] By adopting the above technical solution, when the temperature inside the chamber rises, the helium gas in the temperature sensing box absorbs heat and expands, expanding along the connecting pipe into the shrink tube. This causes the shrink tube to expand and deform, thereby pushing the drive rod on the shrink tube to move. This causes the drive rod to push the sliding block to move closer to the bottom plate, which in turn causes the mounting rod to move the cleaning plate closer to the opening of the ventilation hole. This pushes out the debris accumulated in the ventilation hole, which helps the heat inside the chamber to dissipate from the ventilation hole.

[0010] When the cleaning plate moves towards the vent opening and abuts against the vent wall, the continuous expansion of the contraction tube causes the drive rod to continue moving towards the base plate. However, since the cleaning plate is now abutting against the vent wall, neither the mounting rod nor the sliding block will continue to move towards the base plate. As the drive rod continues to move, it slides along the guide ramp, causing the sliding block to enter the clearance groove and compress the connecting spring. This prevents the drive rod from blocking the sliding block on the side away from the base plate. Consequently, the mounting rod automatically resets away from the base plate under the action of the reset spring, causing the cleaning plate to move away from the vent opening and open the vent. This facilitates cleaning the vent and then opening it for heat dissipation.

[0011] As the heat inside the chamber dissipates and the temperature decreases, the helium gas in the temperature sensing box contracts, causing the contraction tube to deform. This, in turn, moves the drive rod away from the base plate to its initial position on the side of the sliding block furthest from the base plate. Then, under the action of the connecting spring, the sliding block automatically extends out of its clearance groove and abuts against the side of the drive rod closest to the base plate. This allows the drive rod to push the sliding block and move the cleaning plate to clean the ventilation holes when the temperature rises again. This cleaning process requires no external power, utilizing the device's own heat as the driving source. It achieves proactive sensing of heat dissipation needs and automatic triggering of self-cleaning actions, exhibiting a high degree of intelligence, energy efficiency, and reliability.

[0012] Optionally, an adjusting block is slidably disposed on the inner wall of the side plate, one end of the reset spring is disposed on the mounting rod and the other end is disposed on the adjusting block, and a limiting member is provided on the inner wall of the side plate, the limiting member being used to fix the adjusting block on the side plate at different positions from the mounting rod.

[0013] By adopting the above technical solution, the initial compression of the return spring can be changed by moving and fixing the position of the adjusting block, thereby adjusting the magnitude of the restoring force of the return spring on the mounting rod and the cleaning plate. This allows the driving thrust required for the cleaning plate to perform the cleaning action, i.e., the temperature threshold for triggering the cleaning action, to be flexibly adjusted. Users can customize the trigger sensitivity of the self-cleaning function according to the dust concentration, ambient temperature conditions, or different requirements for heat dissipation performance in the cable branch box installation environment. For example, in cold weather, the adjusting block can be fixed closer to the mounting rod, increasing the compression of the return spring and thus increasing the preload of the return spring on the mounting rod. This ensures that the drive rod will only move when the temperature inside the box is higher, i.e., when the deformation of the contraction tube is greater. This allows more heat to accumulate inside the box in cold winters, reducing the risk of electrical components being damaged due to excessively low temperatures. When the weather is hot, the adjusting block can be fixed away from the mounting rod, which reduces the preload of the return spring on the mounting rod. This allows the drive rod to move the mounting rod when the temperature inside the chamber rises slightly, thereby driving the cleaning plate to clean the ventilation holes. This helps dissipate heat inside the chamber, reduces the possibility of heat accumulation, and improves the adaptability and adjustability of the equipment.

[0014] Optionally, the inner wall of the side plate is provided with multiple mounting screw holes, the adjusting block is provided with a connecting hole, and the limiting member includes an adjusting bolt passing through the connecting hole. The adjusting bolt is threadedly connected to the mounting screw hole, and the distance between each mounting screw hole and the mounting rod is different.

[0015] By adopting the above technical solution, when it is necessary to adjust the position of the adjusting block and the mounting rod, the adjusting bolt can be loosened first, and then the adjusting block can be slid to align the connecting hole with different mounting screw holes. Then, the adjusting bolt can be threaded into the different mounting screw holes to fix the adjusting block at multiple preset positions. The threaded connection method provides a secure fixation, effectively resisting vibration and preventing accidental displacement of the adjusting block during equipment operation, ensuring the long-term stability of the cleaning action trigger threshold. Furthermore, adjusting the position of the adjusting block only requires a common tool, such as a screwdriver, facilitating on-site personnel for debugging and maintenance.

[0016] Optionally, a puncture needle is provided on the inner wall of the side plate, and the puncture needle is located on the side of the shrink tube near the mounting rod.

[0017] By adopting the above technical solution, when the temperature inside the chamber rises abnormally due to extreme conditions (such as severe failure or continuous overload) and exceeds the normal operating range, the helium gas inside the temperature sensing box will expand violently, thereby pushing the shrink tube to produce an ultra-large stroke displacement. This causes the shrink tube to move to contact with the puncture needle and be punctured. Because the puncture needle destroys the seal of the shrink tube, the high-pressure helium gas inside the shrink tube will be released instantly, allowing the inert gas helium to fill the inside of the chamber, reducing the oxygen content inside the chamber, and reducing the risk of fire or even explosion caused by continuous high temperature due to electrical component failure.

[0018] Optionally, the shrink tube is detachably connected to the connecting tube and the drive rod. The end of the shrink tube near the drive rod is provided with a snap-fit ​​block. The drive rod is provided with a snap-fit ​​groove, and the snap-fit ​​block snaps into the snap-fit ​​groove.

[0019] By adopting the above technical solution, when the shrink tube needs to be replaced due to aging from long-term use, puncture by a puncture needle, or adjustment requirements, it is only necessary to first remove the locking block from the locking slot to release the locking connection between the locking block and the locking slot. Then, the shrink tube and the connecting tube can be separated, and the damaged shrink tube can be removed from the connecting tube and the drive rod. A new shrink tube is then connected to the connecting tube and the drive rod. Finally, the temperature sensing box is refilled with helium, without the need to disassemble the entire drive assembly or perform complex welding and disassembly. This facilitates the later maintenance and parts replacement of the cable branch box, reduces maintenance costs and time, and improves the maintainability and service life of the cable branch box.

[0020] Optionally, the temperature sensing box includes a thermally conductive layer that is bonded to electrical components.

[0021] By adopting the above technical solution, the heat-conducting layer of the temperature-sensing box is directly and tightly attached to the surface of easily heated electrical components (such as busbar connection points, switch contacts, etc.), enabling the most direct and rapid sensing of temperature changes in critical heat sources. This significantly shortens the response time of temperature sensing, reduces heat loss to other areas besides the temperature-sensing box, and improves the heat transfer efficiency between the helium gas inside the temperature-sensing box and the electrical components, thereby enhancing the sensitivity and accuracy of the cleaning plate's cleaning action. It also ensures that the self-cleaning function of the ventilation holes activates promptly as soon as the internal temperature shows signs of rising, achieving more timely heat dissipation.

[0022] Optionally, a sliding hole is provided on the side plate, and an indicator block is slidably disposed on the wall of the sliding hole. A trigger rod is provided on the drive rod, and the indicator block abuts against the side of the trigger rod away from the mounting rod. When the retractable tube moves to the puncture needle, the indicator block slides in the sliding hole to the side closer to the mounting rod.

[0023] By adopting the above technical solution, when the temperature inside the enclosure is within the normal range, the trigger rod is positioned against the side of the indicator block closest to the mounting rod. When an over-temperature fault occurs and the shrink tube is punctured by the puncture needle, the drive rod has already been pushed by the shrink tube to the side closest to the mounting rod. Simultaneously, the trigger rod also moves towards the mounting rod, causing the indicator block to move towards the mounting rod within the sliding hole under its own weight. The indicator block eventually moves to a position contacting the wall of the sliding hole. This change in the indicator block's position can be observed from outside the enclosure, clearly informing maintenance personnel that a serious over-temperature event has occurred inside the branch enclosure and that the protection mechanism has been activated. This provides a clear visual signal for fault diagnosis, preventative maintenance, and equipment condition assessment, improving the monitorability of the equipment.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The sliding cleaning plate design automatically removes dust and debris that clog the ventilation holes, keeping them clear for a long time. This fundamentally solves the problem of reduced heat dissipation efficiency caused by dust accumulation, ensuring continuous and efficient heat dissipation of the cable distribution box. 2. Utilizing the thermal expansion and contraction effect of the helium-filled temperature sensing box, the temperature signal inside the box is directly converted into mechanical drive, without the need for external power supply and control circuit, realizing pure mechanical intelligent control, which only operates when the temperature rises, saving energy and having high reliability; 3. The design of the adjustment block and limit component allows users to flexibly set the start-up temperature threshold of the self-cleaning function according to actual environmental conditions and heat dissipation requirements, enhancing the device's adaptability to different application scenarios. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0026] Figure 2 This is a cross-sectional structural diagram used to illustrate the driving component in an embodiment of this application.

[0027] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0028] Figure 4 This is a partial cross-sectional structural diagram of the sliding block used in an embodiment of this application.

[0029] Figure 5 This is a partial cross-sectional structural diagram used to illustrate the adjusting bolt in an embodiment of this application.

[0030] Explanation of reference numerals in the attached figures: 1. Cabinet; 11. Cabinet door; 12. Side panel; 121. Ventilation hole; 122. Cleaning plate; 123. Mounting rod; 124. Leaving groove; 125. Sliding block; 126. Guide slope; 127. Return spring; 13. Base plate; 14. Electrical components; 2. Drive assembly; 21. Temperature sensing box; 211. Heat-conducting layer; 22. Connecting pipe; 23. Shrink tube; 231. Drive rod; 232. Trigger rod; 233. Snap-fit ​​block; 234. Snap-fit ​​groove; 3. Adjusting block; 4. Limiting component; 41. Mounting screw hole; 42. Adjusting bolt; 5. Puncture needle; 6. Sliding hole; 61. Indicator block. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0032] This application discloses a high-efficiency heat dissipation cable branch box.

[0033] Reference Figure 1 and Figure 2 A high-efficiency heat dissipation cable distribution box includes a box body 1, electrical components 14 disposed in the box body 1, cables connecting the electrical components 14, and a drive assembly 2. The box body 1 includes a door 11, side panels 12, and a bottom plate 13. Ventilation holes 121 are provided on the side panels 12, and a cleaning plate 122 is slidably disposed on the wall of each ventilation hole 121. The drive assembly 2 is disposed inside the box body 1 and is used to drive the cleaning plate 122 to slide, thus promptly cleaning dust and other debris from the ventilation holes 121, ensuring unobstructed ventilation, and thereby improving the heat dissipation effect of the box body 1.

[0034] Reference Figure 1 and Figure 2 The cabinet door 11 is generally connected to the side panel 12 via hinges or other structures, facilitating the opening and closing of the cabinet 1 and enabling maintenance of the internal electrical components 14. The cleaning plate 122 can be an arc-shaped plate structure, made of materials such as plastic or metal. It is slidably fitted to the wall of the ventilation hole 121. For example, a groove can be provided on the wall of the ventilation hole 121, and the edge of the cleaning plate 122 is embedded in the groove to achieve a sliding connection.

[0035] Reference Figure 2 The drive assembly 2 includes a temperature sensing box 21, a connecting tube 22 connected to the temperature sensing box 21, and a shrink tube 23 located at the end of the connecting tube 22 away from the temperature sensing box 21. The connecting tube 22 connects the temperature sensing box 21 and the shrink tube 23. A drive rod 231 is provided on the shrink tube 23, and each cleaning plate 122 is connected to a common mounting rod 123. The shrink tube 23 is detachably connected to the connecting tube 22. Specifically, a well-sealed adapter can be installed at the end of the shrink tube 23 near the connecting tube 22 to detachably connect the connecting tube 22 and the shrink tube 23 together.

[0036] Reference Figure 2 The temperature sensing box 21 is filled with nitrogen gas. A gas filling port for connecting a gas pump can be provided on the temperature sensing box 21. After filling with helium, the filling port automatically closes, ensuring good airtightness of the temperature sensing box 21. Since the aforementioned gas pump, filling port, and adapter are all mature gas filling technologies, they will not be described in detail further.

[0037] Reference Figure 1 and Figure 2 The temperature sensing box 21 includes a heat-conducting layer 211, which is in contact with the electrical components 14 and is used to sense temperature changes inside the box. The heat-conducting layer 211 can be made of a material with good thermal conductivity, such as aluminum alloy. Its function is to better transfer the heat generated by the electrical components 14 to the temperature sensing box 21, so that the helium gas inside the temperature sensing box 21 can more accurately detect temperature changes.

[0038] Reference Figure 2 and Figure 3 The contraction tube 23 has a certain degree of elasticity and will contract or expand when the internal pressure changes. The drive rod 231 is slidably mounted on the inner wall of the side plate 12 and is detachably connected to the contraction tube 23 to transmit the movement of the contraction tube 23. Specifically, a locking block 233 is provided at one end of the contraction tube 23 near the drive rod 231, and a locking groove 234 is provided on the drive rod 231, into which the locking block 233 engages and extends.

[0039] Reference Figure 2 and Figure 3 The aforementioned detachable connection method facilitates the replacement of the shrink tube 23. When the shrink tube 23 is damaged, it can be separated from the connecting tube 22 and the drive rod 231 to install a new shrink tube 23. The engagement of the snap-fit ​​block 233 and the snap-fit ​​groove 234 can be achieved by interference fit or snap-fit, ensuring the stability of the connection.

[0040] Reference Figure 2 and Figure 3 The mounting rod 123 is slidably mounted on the inner wall of the side plate 12. It is generally long and can be made of metal or plastic. It connects the cleaning plates 122 together so that the cleaning plates 122 can move synchronously.

[0041] Reference Figure 3 and Figure 4The mounting rod 123 is also provided with a clearance groove 124, in which a sliding block 125 is slidably disposed. The sliding block 125 is provided with a guide slope 126, which is used to guide the sliding block 125 into the clearance groove 124. The sliding block 125 is provided with a connecting spring (not shown in the figure), which has the tendency to drive the sliding block 125 out of the clearance groove 124. The driving rod 231 abuts against the guide slope 126.

[0042] Reference Figure 3 and Figure 4 The function of the clearance groove 124 is to provide sliding space for the sliding block 125, and its shape can be designed according to the shape of the sliding block 125. The sliding block 125 can be square or round, etc. The guide slope 126 allows the drive rod 231 to smoothly push the sliding block 125 into the clearance groove 124 when it contacts the sliding block 125. One end of the connecting spring is fixed to the sliding block 125, and the other end is fixed to the inner wall of the clearance groove 124. When the drive rod 231 pushes the sliding block 125, the connecting spring is compressed.

[0043] Reference Figure 4 and Figure 5 The mounting rod 123 is equipped with a return spring 127, which has a tendency to drive the mounting rod 123 to move away from the opening of the ventilation hole 121. Nitrogen has good thermal expansion properties. When the temperature inside the chamber rises, the nitrogen in the temperature sensing box 21 expands due to heat and is transmitted to the contraction tube 23 through the connecting pipe 22, causing the contraction tube 23 to contract, thereby driving the drive rod 231 to move.

[0044] Reference Figure 4 and Figure 5 An adjusting block 3 is slidably mounted on the inner wall of the side plate 12. One end of a return spring 127 is mounted on the mounting rod 123, and the other end is mounted on the adjusting block 3. When the drive rod 231 no longer applies force to the sliding block 125, the return spring 127 will push the mounting rod 123 back to its initial position. A limiting member 4 is provided on the inner wall of the side plate 12. The limiting member 4 is used to fix the adjusting block 3 on the side plate 12 at different positions from the mounting rod 123.

[0045] Reference Figure 5 The adjusting block 3 can be a block structure, which slides against the inner wall of the side plate 12. For example, a guide rail can be provided on the inner wall of the side plate 12, and a slider that cooperates with the guide rail can be provided on the adjusting block 3. The function of the limiting member 4 is to fix the position of the adjusting block 3, thereby adjusting the initial preload of the return spring 127.

[0046] Reference Figure 5The inner wall of the side plate 12 has multiple mounting screw holes 41, and the adjusting block 3 has a connecting hole (not shown in the figure). The limiting member 4 includes an adjusting bolt 42 that passes through the connecting hole. The adjusting bolt 42 is threaded into the mounting screw hole 41, and the distance between each mounting screw hole 41 and the mounting rod 123 is different. The distribution of the mounting screw holes 41 can be designed according to actual needs. By screwing the adjusting bolt 42 into the connecting hole and different mounting screw holes 41, the distance between the adjusting block 3 and the mounting rod 123 can be changed, thereby changing the compression degree of the return spring 127 and realizing the adjustment of the operating temperature threshold of the cleaning plate 122.

[0047] Reference Figure 4 The inner wall of the side plate 12 is provided with a puncture needle 5, which is located on the side of the shrink tube 23 near the mounting rod 123. The puncture needle 5 is generally a sharp metal needle, and its function is to puncture the shrink tube 23 when the temperature inside the box 1 is too high and the shrink tube 23 is overstretched, so as to release the internal helium gas and protect the box 1 from fire.

[0048] Reference Figure 3 A sliding hole 6 is provided on the side plate 12. An indicator block 61 is slidably disposed on the wall of the sliding hole 6. A trigger rod 232 is provided on the drive rod 231. The indicator block 61 abuts against the side of the trigger rod 232 away from the mounting rod 123. When the retraction tube 23 moves to the puncture needle 5, the indicator block 61 slides in the sliding hole 6 to the side closer to the mounting rod 123. The sliding hole 6 provides sliding space for the indicator block 61. The indicator block 61 can be a block-shaped object with color markings.

[0049] Reference Figure 2 and Figure 3 The trigger rod 232 is fixedly connected to the drive rod 231. When the retractable tube 23 extends to its final position, the drive rod 231 drives the trigger rod 232 to slide to a position close to the bottom plate 13, so that the indicator block 61 slides to the side close to the bottom plate 13 under its own gravity. The fault status inside the box 1 can be intuitively understood by the position change of the indicator block 61.

[0050] The implementation principle of a high-efficiency heat dissipation cable distribution box according to this application embodiment is as follows: When the electrical components 14 inside the cable distribution box generate heat during operation, causing the temperature inside the box to rise, the nitrogen gas in the temperature sensing box 21 expands due to heat. This expansion causes the contraction tube 23 to expand through the connecting pipe 22. The contraction tube 23 drives the drive rod 231 to move. The drive rod 231 abuts against the guide slope 126 of the sliding block 125, pushing the sliding block 125 to move. This, in turn, drives the mounting rod 123 to move. The mounting rod 123 then drives the cleaning plate 122 to slide within the ventilation hole 121, cleaning the debris inside the ventilation hole 121. During the movement of the drive rod 231, the sliding block 125 automatically retracts into the clearance groove 124, so that after the cleaning plate 122 cleans the ventilation hole 121, it will automatically reset under the action of the return spring 127, thereby opening the ventilation hole 121 and facilitating the dissipation of heat from the ventilation hole 121. When the temperature inside the box decreases, the shrink tube 23 returns to its original shape. Under the action of the return spring 127, the mounting rod 123 and the cleaning plate 122 return to their initial positions, facilitating the next cleaning of the ventilation hole 121. The above cleaning process requires no external power, using the equipment's own heat as the driving source, saving energy. At the same time, it alleviates the problem of poor heat dissipation caused by easy blockage of the ventilation hole 121 in existing cable branch boxes, improving the heat dissipation efficiency and operational reliability of the cable branch box, and extending the service life of the electrical components 14.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-efficiency heat dissipation cable distribution box, comprising a box body (1), electrical components (14) disposed in the box body (1), and cables connecting the electrical components (14), wherein the box body (1) comprises a door (11), side panels (12), and a bottom plate (13), and the side panels (12) are provided with ventilation holes (121), characterized in that: A cleaning plate (122) is slidably disposed on the wall of each ventilation hole (121). A drive assembly (2) is provided inside the housing (1), which is used to drive the cleaning plate (122) to slide.

2. The high-efficiency heat dissipation cable branch box according to claim 1, characterized in that: The driving assembly (2) includes a temperature sensing box (21), a connecting pipe (22) connected to the temperature sensing box (21), and a shrink tube (23) disposed at one end of the connecting pipe (22) away from the temperature sensing box (21). The connecting pipe (22) connects the temperature sensing box (21) and the shrink tube (23). A driving rod (231) is provided on the shrink tube (23). Each of the cleaning plates (122) is connected to a common mounting rod (123). A clearance groove (124) is provided on the mounting rod (123). A sliding block (125) is slidably disposed in the clearance groove (124). A mounting block (125) is provided on the sliding block (125). There is a guide slope (126) for guiding the sliding block (125) into the relief groove (124). The sliding block (125) is provided with a connecting spring, which has the tendency to drive the sliding block (125) out of the relief groove (124). The drive rod (231) abuts against the guide slope (126). The temperature sensing box (21) is filled with nitrogen. The mounting rod (123) is provided with a return spring (127), which has the tendency to drive the mounting rod (123) to move away from the opening of the ventilation hole (121).

3. The high-efficiency heat dissipation cable branch box according to claim 2, characterized in that: An adjusting block (3) is slidably disposed on the inner wall of the side plate (12). One end of the reset spring (127) is disposed on the mounting rod (123) and the other end is disposed on the adjusting block (3). A limiting member (4) is provided on the inner wall of the side plate (12). The limiting member (4) is used to fix the adjusting block (3) on the side plate (12) at different positions from the mounting rod (123).

4. The high-efficiency heat dissipation cable branch box according to claim 3, characterized in that: The inner wall of the side plate (12) is provided with a plurality of mounting screw holes (41), the adjusting block (3) is provided with a connecting hole, the limiting member (4) includes an adjusting bolt (42) passing through the connecting hole, the adjusting bolt (42) is threadedly connected to the mounting screw hole (41), and the distance between each mounting screw hole (41) and the mounting rod (123) is different.

5. A high-efficiency heat dissipation cable branch box according to claim 2, characterized in that: The inner wall of the side plate (12) is provided with a puncture needle (5), which is located on the side of the shrink tube (23) near the mounting rod (123).

6. The high-efficiency heat dissipation cable branch box according to claim 5, characterized in that: The shrink tube (23) is detachably connected to the connecting tube (22) and the drive rod (231). The shrink tube (23) has a snap-fit ​​block (233) at one end near the drive rod (231). The drive rod (231) has a snap-fit ​​groove (234). The snap-fit ​​block (233) snaps into the snap-fit ​​groove (234).

7. A high-efficiency heat dissipation cable branch box according to claim 2, characterized in that: The temperature sensing box (21) includes a heat-conducting layer (211), which is attached to the electrical component (14).

8. A high-efficiency heat dissipation cable branch box according to claim 5, characterized in that: The side plate (12) is provided with a sliding hole (6), and an indicator block (61) is slidably disposed on the wall of the sliding hole (6). The drive rod (231) is provided with a trigger rod (232), and the indicator block (61) abuts against the side of the trigger rod (232) away from the mounting rod (123). When the shrink tube (23) moves to the puncture needle (5), the indicator block (61) slides in the sliding hole (6) to the side close to the mounting rod (123).

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