Anti-condensation low-voltage cable branch box

Abstract

The application discloses a condensation-preventing low-voltage cable branch box, and relates to the technical field of cable branch boxes, which comprises a box body of the cable branch box and further comprises a support fixed horizontally to the inner wall of the box body, an exhaust device arranged on the support, a fixing pipe fixed to the exhaust device, the upper end of the fixing pipe being closed, a plurality of exhaust pipes fixed to the periphery of the fixing pipe from top to bottom, the exhaust pipes being in communication with the inner cavity of the fixing pipe, the ends of the exhaust pipes away from the fixing pipe being closed, and a plurality of air suction openings being arranged on the periphery of the exhaust pipes. In the application, the exhaust device is started, hot air near the electrical elements in the box body is sucked out and discharged from the box body through the plurality of air suction openings, the temperature inside the box body is prevented from being higher than the temperature of the environment outside the box body, and the phenomenon that condensation is generated on the inner wall of the box body is avoided. In addition, the air suction openings are directly aimed at the electrical elements, so that the heat generated by the electrical elements during operation can be timely sucked out, and the generation of condensation on the inner wall of the box body is reduced.

Description

Technical Field

[0001] This invention relates to the field of cable branch box technology, specifically to an anti-condensation type low-voltage cable branch box. Background Technology

[0002] Cable distribution boxes are an important component of power networks, primarily used for branching, connecting, and switching cable lines. They mainly consist of a box body, incoming and outgoing cables, branch cables, connectors, and insulation components. Cable distribution boxes are widely used in power, telecommunications, transportation, and construction industries. In power systems, they are commonly used at various levels of urban, rural, and industrial power grids, providing safe and reliable power supply to various users. Furthermore, in the telecommunications field, cable distribution boxes provide a stable and efficient channel for data transmission.

[0003] When electrical components inside a cable distribution box are in operation, they generate heat, causing the internal temperature of the box to be higher than the external temperature. This can lead to condensation on the inner wall of the box, which can drip onto the electrical components and create a safety hazard. Therefore, it is necessary to implement anti-condensation measures for existing cable distribution boxes. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-condensation type low-voltage cable branch box to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A low-voltage cable branch box with anti-condensation features includes a box body and further includes: A bracket is horizontally fixed to the inner wall of the box, and the bracket is equipped with an exhaust device; A fixed pipe is attached to the exhaust device, and the upper end of the fixed pipe is closed. Multiple exhaust pipes are fixedly attached to the periphery of the fixed pipe from top to bottom. The exhaust pipes are in communication with the inner cavity of the fixed pipe. The end of the exhaust pipe away from the fixed pipe is closed, and multiple air intake ports are opened around the periphery of the exhaust pipe.

[0006] Furthermore, several temperature sensors are installed on both the inner and outer walls of the enclosure.

[0007] Furthermore, the exhaust device includes a mounting bracket connected to the support, a hollow chamber connected to the upper surface of the mounting bracket, a fixed tube fixed to the top surface of the hollow chamber at its lower end and communicating with the inner cavity of the hollow chamber, a ventilation chamber fixed to the periphery of the hollow chamber, the ventilation chamber extending through the outer wall of the box body, an exhaust fan installed inside the ventilation chamber, and a filter screen provided at the side opening of the ventilation chamber extending through the box body.

[0008] Furthermore, a waxing device is fitted around the outer edge of the exhaust pipe. The waxing device moves along the axial direction of the exhaust pipe and applies wax to the surface of the exhaust pipe during the movement.

[0009] Furthermore, the waxing device includes a waxing chamber fitted around the outer edge of the exhaust pipe. One end of the waxing chamber is open and connected to a cover plate. Two arc-shaped wax blocks are installed inside the waxing chamber, and the two wax blocks form a through hole to allow the exhaust pipe to pass through freely.

[0010] Furthermore, the waxing chamber is provided with two arc-shaped plates, and the wax block is correspondingly connected to the inner arc surface of the arc-shaped plates. The waxing chamber is provided with a self-clamping unit, which is used to drive the two arc-shaped plates to move closer to each other, so that the inner arc surface of the wax block abuts against the outer edge of the exhaust pipe.

[0011] Furthermore, the self-clamping unit includes a first spiral spring installed in the inner cavity of the wax coating chamber. The first spiral spring is fitted onto the outer arc surface of the two arc-shaped plates. The end of the inner ring of the first spiral spring is fixed to the outer wall of one of the arc-shaped plates. The end of the outer ring of the first spiral spring is integrally formed with a protrusion. A sliding column is vertically inserted through the periphery of the wax coating chamber. The sliding column slides freely on the wax coating chamber. A short pin is fixed to the upper end of the sliding column. The short pin rotatably passes through the protrusion. A floating component is provided on the fixed tube for driving the sliding column to slide freely up and down.

[0012] Furthermore, a limiting protrusion is fixed to the outer wall of the arc-shaped plate, and a limiting groove is provided on the end face of the waxing chamber for the limiting protrusion to engage. The limiting protrusion slides freely in the radial direction of the waxing chamber within the limiting groove.

[0013] Furthermore, the floating component includes a ball bearing rotatably embedded in the lower end of the sliding column, and a suspension rod is horizontally fixed to the periphery of the fixed tube. The upward-facing side of the suspension rod has multiple notches, and the positions of the notches correspond to the positions of the air extraction ports.

[0014] Furthermore, a motor frame is fixedly connected to the outer wall of the fixed tube, a winding motor is mounted on the motor frame, and a winding shaft is fixedly sleeved on the output shaft of the winding motor. A connecting plate is fixedly connected to the outer wall of multiple waxing chambers, and a rope threading block is fixedly connected to the outer wall of the connecting plate. A pull rope is wound on the winding shaft, and a rope threading hole is opened on the outer wall of the rope threading block to allow the pull rope to pass freely. The pull rope is fastened to the outer wall of the rope threading block. A mounting base is connected to the inner side wall of the box, and a mounting cavity is opened on the outer wall of the mounting base. A winding shaft is horizontally rotatably connected to the mounting base. A second spiral spring is installed in the mounting cavity. The second spiral spring is fitted around the periphery of the winding shaft, and its two ends are respectively fixed to the periphery of the winding shaft and the inner wall of the mounting cavity. The end of the pull rope away from the winding shaft is wound on the winding shaft.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the exhaust device is activated and the hot air near the electrical components inside the box is extracted and discharged from the box through multiple air extraction ports, thereby avoiding the phenomenon that the internal temperature of the box is higher than the external ambient temperature, which may lead to condensation on the inner wall of the box. In addition, since the air extraction ports are directly aimed at the electrical components, the heat generated by the electrical components during operation can be extracted in time, reducing the condensation on the inner wall of the box. 2. In this invention, the waxing chamber slides on the exhaust pipe, allowing the wax block to coat the surface of the exhaust pipe, thereby coating the surface of the exhaust pipe with a layer of wax, which makes the surface of the exhaust pipe less prone to condensation. 3. In this invention, when the wax coating chamber slides on the exhaust pipe, the ball bearing will roll on the upper surface of the suspension rod and the inner wall of the notch groove. The notch groove corresponds to the air intake port, so that when the ball bearing rolls on the inner wall of the notch groove, the first spiral spring will be in an unfolded state, which greatly reduces the squeezing force of the wax block on the surface of the exhaust pipe. As a result, when the wax block slides to the opening of the air intake port, the edge of the air intake port will not scrape or cut the inner arc surface of the wax block, thus preventing the inner arc surface of the wax block from being scraped off by the edge of the air intake port. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an anti-condensation low-voltage cable branch box according to the present invention; Figure 2 for Figure 1 Enlarged schematic diagram of the local structure at point A; Figure 3 for Figure 1 A structural diagram from another perspective; Figure 4 This is a schematic diagram showing the positional relationship after omitting the box body in this invention; Figure 5 for Figure 4A structural diagram from another perspective; Figure 6 for Figure 5 Schematic diagram of the explosive decomposition of the medium structure; Figure 7 This is a schematic diagram showing the positional relationship of the wax coating chamber, cover plate, and wax block after assembly in this invention; Figure 8 for Figure 7 Schematic diagram of the explosive decomposition of the medium structure; Figure 9 for Figure 7 A schematic diagram showing the positional relationship after omitting the cover plate; Figure 10 for Figure 9 A structural diagram from another perspective.

[0017] The following are the annotations for each item in the attached diagram: 1. Exhaust pipe; 2. Connecting plate; 3. Air extraction port; 4. Wax coating chamber; 5. Box body; 6. Suspension rod; 7. Pull rope; 8. Notch groove; 9. Ball bearing; 10. Sliding column; 11. Rope threading block; 12. Winding shaft; 13. Second spiral spring; 14. Mounting base; 15. Fixing pipe; 16. Motor frame; 17. Rewinding motor; 18. Ventilation chamber; 19. Hollow chamber; 20. Mounting bracket; 21. Rewinding shaft; 22. Bracket; 23. Exhaust fan; 24. Filter screen; 25. Wax block; 26. Cover plate; 27. Limiting groove; 28. First spiral spring; 29. ​​Short pin; 30. Protrusion; 31. Limiting protrusion; 32. Arc plate. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1 - Figure 10 This invention provides a technical solution: an anti-condensation type low-voltage cable branch box, including a box body 5. A bracket 22 is horizontally welded to the inner wall of the lower side of the box body 5. A mounting bracket 20 is screwed to the upward-facing side of the bracket 22. A hollow chamber 19 is screwed to the upper surface of the mounting bracket 20. The hollow chamber 19 is hollow inside, and a ventilation chamber 18 is connected to the periphery of the hollow chamber 19. The end of the ventilation chamber 18 away from the hollow chamber 19 extends out of the box body 5. In addition, the inner cavity of the ventilation chamber 18 communicates with the inner cavity of the hollow chamber 19. An exhaust fan 23 (e.g., ...) is installed inside the ventilation chamber 18. Figure 6As shown), after the exhaust fan 23 is started, it will generate airflow from the inside of the box 5 to the outside of the box 5. In addition, a filter screen 24 is installed at one end of the ventilation chamber 18 that protrudes from the box 5. The filter screen 24 is used to filter the air outside the box 5 to prevent dust and foreign objects from entering the box 5. A fixed pipe 15 is vertically welded to the top of the hollow chamber 19. The upper end of the fixed pipe 15 is closed. Multiple exhaust pipes 1 are fixedly connected to the periphery of the fixed pipe 15. These exhaust pipes 1 are welded to the periphery of the fixed pipe 15 from top to bottom. The end of each exhaust pipe 1 away from the fixed pipe 15 is closed, and the inner cavity of the exhaust pipe 1 is in communication with the inner cavity of the fixed pipe 15. Each exhaust pipe 1 is installed below each row of electrical components installed inside the housing 5. Multiple air intake ports 3 are provided on the outer wall of each exhaust pipe 1, with the openings of the ports facing upwards and towards the electrical components. When the exhaust fan 23 operates, it generates suction through the hollow chamber 19, the fixed pipe 15, and the exhaust pipes 1, thereby causing the electrical components to... The heat generated during operation can be cooled by the airflow entering the exhaust port 3, thereby making the temperature inside and outside the box 5 similar, thus solving the problem of condensation on the inner wall of the box 5. In addition, at least one temperature sensor is installed on the inner wall and the outer wall of the box 5. The temperature sensor is electrically connected to the control module (not shown in the figure) inside the box 5 through a cable. When the temperature value of the temperature sensor inside the box 5 is greater than the temperature value collected by the temperature sensor outside the box 5, the control module will control the exhaust fan 23 to work, so that the exhaust fan 23 can draw air from the inside of the box 5 to cool it down. Each exhaust pipe 1 is fitted with a wax coating chamber 4 on its outer edge. The wax coating chamber 4 is open at one end along the axis and is connected to a cover plate 26 (e.g., ...). Figure 7As shown), the cover plate 26 and the end face of the waxing chamber 4 have through holes for the exhaust pipe 1 to pass through freely. Additionally, two arc-shaped wax blocks 25 are installed inside the waxing chamber 4. The two wax blocks 25 are symmetrically arranged along the axial direction of the waxing chamber 4, forming a through hole between their inner arc surfaces for the exhaust pipe 1 to pass through freely. Two arc-shaped plates 32 are provided inside the waxing chamber 4, with the wax blocks 25 correspondingly connected to the inner arc surfaces of the arc-shaped plates 32. Limiting protrusions 31 are fixed to the outer walls of the arc-shaped plates 32. A limiting groove 27 is provided on the end face of the waxing chamber 4 for the limiting protrusions 31 to engage. The limiting protrusions 31 slide freely radially within the limiting groove 27 of the waxing chamber 4. When the two arc-shaped plates 32 move closer to each other, the limiting protrusions 31 are positioned within the limiting groove. The two arc plates 32 slide within the groove 27, allowing the two arc plates 32 to press against the two wax blocks 25 respectively. This causes the inner arc surface of the wax block 25 to press against the exhaust pipe 1. When the waxing chamber 4 slides on the surface of the exhaust pipe 1, the wax layer on the inner arc surface of the wax block 25 will coat the surface of the exhaust pipe 1 with wax, resulting in a thin layer of wax on the surface of the exhaust pipe 1. Due to the hydrophobicity of the wax layer, condensation is less likely to occur on the surface of the exhaust pipe 1. This prevents the surface temperature of the exhaust pipe 1 from rising when the exhaust pipe 1 extracts the hot air generated by the operation of the electrical components (the increased temperature will not cause the wax layer to melt), which could lead to cold air from outside the housing 5 entering the housing 5 and adhering to the surface of the exhaust pipe 1, causing condensation. The first spiral spring 28 is installed in the inner cavity of the waxing chamber 4 (e.g. Figure 9 As shown), the first spiral spring 28 is fitted onto the outer arc surface of two arc-shaped plates 32. The end of the inner ring of the first spiral spring 28 is fixed to the outer wall of one of the arc-shaped plates 32. The end of the outer ring of the first spiral spring 28 is integrally formed with a protrusion 30. A sliding post 10 is vertically inserted through the periphery of the waxing chamber 4. The sliding post 10 slides freely on the waxing chamber 4. A short pin 29 is fixed to the upper end of the sliding post 10. The short pin 29 rotatably passes through the protrusion 30. In addition, the end of the outer ring of the first spiral spring 28 has a notch for the sliding post 10 to pass through freely. The lower end of the sliding post 10 rotatably... The fixed tube 15 is horizontally fixed to the periphery of the ball bearing 9 and the suspension rod 6 is embedded in the tube. The upward side of the suspension rod 6 has multiple notches 8. The position of the notches 8 corresponds to the position of the air extraction port 3. When the wax coating chamber 4 slides on the exhaust pipe 1 to the position of the air extraction port 3, the ball bearing 9 will roll from the upper surface of the suspension rod 6 into the notch 8. This causes the first spiral spring 28 to change from an elastic contraction state to an elastic expansion state. This reduces the elastic force of the first spiral spring 28 on the arc plate 32, and thus reduces the pressure of the inner arc surface of the wax block 25 on the surface of the exhaust pipe 1. A motor frame 16 is fixedly connected to the outer wall of the fixed tube 15. A winding motor 17 is mounted on the motor frame 16. The output shaft of the winding motor 17 is fixedly sleeved with a winding shaft 21. A connecting plate 2 is fixedly connected to the outer wall of multiple waxing chambers 4. A rope threading block 11 is fixedly connected to the outer wall of the connecting plate 2. A pull rope 7 is wound on the winding shaft 21. A rope threading hole is opened on the outer wall of the rope threading block 11 to allow the pull rope 7 to pass freely. The pull rope 7 is fastened to the outer wall of the rope threading block 11. A mounting base 14 is connected to the inner side wall of the box body 5 (e.g., Figure 2 As shown), the mounting base 14 has a mounting cavity on its outer wall. The mounting base 14 is horizontally rotatably connected to a winding shaft 12. A second spiral spring 13 is installed inside the mounting cavity. The second spiral spring 13 is fitted around the periphery of the winding shaft 12, and its two ends are respectively fixed to the periphery of the winding shaft 12 and the inner wall of the mounting cavity. The end of the pull rope 7 away from the take-up shaft 21 is wound around the winding shaft 12. When the take-up motor 17 is started, the output shaft of the take-up motor 17 rotates, which drives the take-up shaft 21 to rotate, thereby causing the take-up shaft 21 to wind up the pull rope 7. This allows the pull rope 7 to drive the rope-threading block 11 to move toward the fixed tube 15, thereby causing the connecting plate 2 to drive the multiple waxing chambers 4. The movement allows the wax block 25 to coat the surface of the exhaust pipe 1. In addition, the pull rope 7 will drive the winding shaft 12 to rotate, causing the winding shaft 12 to contract the second spiral spring 13 and accumulate elastic potential energy. When the winding motor 17 is de-energized, the elastic potential energy of the second spiral spring 13 is released, causing the winding shaft 12 to rotate in the opposite direction. This causes the pull rope 7 to drive the connecting plate 2 to move in the opposite direction, allowing the wax block 25 in the waxing chamber 4 to coat the surface of the exhaust pipe 1 again. Through the two movements of the waxing chamber 4, the wax block 25 can repeatedly coat the surface of the exhaust pipe 1 in opposite directions, reducing the blind spots of waxing on the surface of the exhaust pipe 1.

[0020] Working principle of the invention: When the internal temperature of the enclosure 5 detected by the temperature sensor inside the enclosure 5 is greater than the temperature collected by the external temperature sensor, the control module will control the exhaust fan 23 to work. This will generate suction on the air inside the enclosure 5 through the ventilation chamber 18, hollow chamber 19, fixed pipe 15, exhaust pipe 1, and air extraction port 3. This will cause the hot air near the electrical components to be drawn into the air extraction port 3, and then enter the ventilation chamber 18 through the exhaust pipe 1, fixed pipe 15, and hollow chamber 19 in sequence. The air will then be blown out through the filter screen 24 installed at the opening of the ventilation chamber 18, thereby causing the exhaust fan 23 to extract air and cool the inside of the enclosure 5.

[0021] Additionally, the control module powers on the winding motor 17, causing its output shaft to rotate and drive the winding shaft 21 to rotate. This causes the winding shaft 21 to wind up the pull rope 7, allowing the pull rope 7 to move the rope-threading block 11 toward the fixed tube 15. This, in turn, causes the connecting plate 2 to move multiple waxing chambers 4. As the ball bearing 9 rolls on the upper surface of the suspension rod 6, the short pin 29 causes the protrusion 30 to move toward the inside of the waxing chamber 4, and the sliding column 10 to squeeze the second spiral spring 13. This causes the second spiral spring 13 to be compressed and accumulate elastic potential energy, allowing the second spiral spring 13 to slide freely along the radial direction of the waxing chamber 4 on the arc plate 32. This causes the inner arc surface of the wax block 25 to squeeze the surface of the exhaust pipe 1, and as the waxing chamber 4 moves, the wax block 25 can apply wax to the surface of the exhaust pipe 1. When the waxing chamber 4 moves close to the air extraction port 3, the ball bearing 9 rolls from the upper surface of the suspension rod 6 to the inner wall of the notch groove 8. The second spiral spring 13 has an elastic resisting force on the short pin 29, which causes the sliding column 10 to drive the short pin 29 to move outward from the waxing chamber 4. This causes the elastic contraction deformation of the second spiral spring 13 to change to elastic expansion deformation, allowing the second spiral spring 13 to expand radially outward from the waxing chamber 4 within the mounting cavity. That is, the elastic resisting force of the second spiral spring 13 on the arc plate 32 is reduced, which in turn reduces the squeezing force of the wax block 25 on the surface of the exhaust pipe 1. Thus, when the waxing chamber 4 moves to the air extraction port 3 of the exhaust pipe 1, the squeezing force of the wax block 25 on the surface of the exhaust pipe 1 decreases simultaneously. This prevents the edge of the air extraction port 3 from cutting the surface of the wax block 25. Scratching and wear reduce the lifespan of the wax block 25. In addition, the pull rope 7 will drive the winding shaft 12 to rotate, causing the winding shaft 12 to contract on the second spiral spring 13 and accumulate elastic potential energy. When the winding motor 17 is de-energized, the elastic potential energy of the second spiral spring 13 is released, causing the winding shaft 12 to rotate in the opposite direction. This causes the pull rope 7 to drive the connecting plate 2 to move in the opposite direction, allowing the wax block 25 in the waxing chamber 4 to re-wax the surface of the exhaust pipe 1. Through the two movements of the waxing chamber 4, the wax block 25 can repeatedly wax the surface of the exhaust pipe 1 in opposite directions, reducing the waxing blind spots on the surface of the exhaust pipe 1. In addition, a recycling device can be installed on the bottom wall of the box 5 to collect the wax debris that falls on the surface of the exhaust pipe 1.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-voltage cable branch box with anti-condensation function, comprising a box body (5) for the cable branch box, characterized in that, Also includes: A bracket (22) is horizontally fixed to the inner wall of the box (5), and an exhaust device is provided on the bracket (22); A fixed pipe (15) is fixed to the exhaust device, and the upper end of the fixed pipe (15) is closed. Multiple exhaust pipes (1) are fixed to the periphery of the fixed pipe (15) from top to bottom. The exhaust pipes (1) are connected to the inner cavity of the fixed pipe (15). The end of the exhaust pipe (1) away from the fixed pipe (15) is closed, and multiple air extraction ports (3) are opened around the periphery of the exhaust pipe (1). Several temperature sensors are installed on the inner and outer walls of the box (5); The exhaust device includes a mounting bracket (20) connected to the bracket (22), a hollow chamber (19) is connected to the upper surface of the mounting bracket (20), the lower end of the fixed pipe (15) is fixed to the top surface of the hollow chamber (19) and communicates with the inner cavity of the hollow chamber (19), a ventilation chamber (18) is fixed to the periphery of the hollow chamber (19), the ventilation chamber (18) extends out of the outer wall of the box (5), and an exhaust fan (23) is installed in the ventilation chamber (18), and a filter screen (24) is provided at the side opening of the ventilation chamber (18) that extends out of the box (5). The exhaust pipe (1) is fitted with a waxing device on its outer edge. The waxing device moves along the axial direction of the exhaust pipe (1) and applies wax to the surface of the exhaust pipe (1) during the movement.

2. The anti-condensation low-voltage cable branch box according to claim 1, characterized in that, The waxing device includes a waxing chamber (4) fitted on the outer edge of the exhaust pipe (1). The waxing chamber (4) is open at one end in the axial direction and connected to a cover plate (26). Two arc-shaped wax blocks (25) are installed in the inner cavity of the waxing chamber (4). The two wax blocks (25) form a through hole between them so that the exhaust pipe (1) can pass through freely.

3. The anti-condensation low-voltage cable branch box according to claim 2, characterized in that, The waxing chamber (4) is provided with two arc-shaped plates (32), and the wax block (25) is connected to the inner arc surface of the arc-shaped plate (32). The waxing chamber (4) is provided with a self-clamping unit, which is used to drive the two arc-shaped plates (32) to move closer to each other, so that the inner arc surface of the wax block (25) abuts against the outer edge of the exhaust pipe (1).

4. The anti-condensation low-voltage cable branch box according to claim 3, characterized in that, The self-clamping unit includes a first spiral spring (28) installed in the inner cavity of the waxing chamber (4). The first spiral spring (28) is fitted on the outer arc surface of the two arc plates (32). The end of the inner ring of the first spiral spring (28) is fixed to the outer wall of one of the arc plates (32). The end of the outer ring of the first spiral spring (28) is integrally formed with a protrusion (30). A sliding column (10) is vertically inserted through the periphery of the waxing chamber (4). The sliding column (10) slides freely on the waxing chamber (4). A short pin (29) is fixed to the upper end of the sliding column (10). The short pin (29) is rotatably inserted through the protrusion (30). A floating component is provided on the fixed tube (15) for driving the sliding column (10) to slide freely up and down.

5. The anti-condensation low-voltage cable branch box according to claim 4, characterized in that, The outer wall of the arc plate (32) is fixed with a limiting protrusion (31), and the end face of the waxing chamber (4) is provided with a limiting groove (27) for the limiting protrusion (31) to engage. The limiting protrusion (31) slides freely in the radial direction of the waxing chamber (4) within the limiting groove (27).

6. The anti-condensation low-voltage cable branch box according to claim 4, characterized in that, The floating component includes a ball bearing (9) rotatably embedded in the lower end of the sliding column (10), and a suspension rod (6) is horizontally fixed to the periphery of the fixed tube (15). The upward-facing side of the suspension rod (6) is provided with a plurality of notches (8), and the position of the notches (8) corresponds to the position of the air extraction port (3).

7. The anti-condensation low-voltage cable branch box according to claim 4, characterized in that, A motor frame (16) is fixedly connected to the outer wall of the fixed tube (15). A winding motor (17) is installed on the motor frame (16). The output shaft of the winding motor (17) is fixedly sleeved with a winding shaft (21). A connecting plate (2) is fixedly connected to the outer wall of multiple waxing chambers (4). A rope threading block (11) is fixedly connected to the outer wall of the connecting plate (2). A pull rope (7) is wound on the winding shaft (21). A rope threading hole is opened on the outer wall of the rope threading block (11) for the pull rope (7) to pass through freely. The pull rope (7) is tightly connected to the rope threading block (11). The outer wall of the box (5) is connected to the inner side wall of the box (5). The outer wall of the mounting base (14) is provided with a mounting cavity. The mounting base (14) is horizontally rotatably connected to the winding shaft (12). The mounting cavity is equipped with a second spiral spring (13). The second spiral spring (13) is fitted around the periphery of the winding shaft (12). The two ends of the second spiral spring (13) are respectively fixed to the periphery of the winding shaft (12) and the inner wall of the mounting cavity. The end of the pull rope (7) away from the winding shaft (21) is wound on the winding shaft (12).

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