A cable branch box

Abstract

This application relates to the technical field of cable branch boxes, and discloses a cable branch box including a box body with a placement groove on the box body. A busbar is placed in the placement groove, and multiple cables are placed on the busbar. A mounting cover is provided in the placement groove, and the busbar is disposed within the mounting cover. The mounting cover has an inlet and an outlet, and a fan is located at the outlet. The inner diameter of the mounting cover gradually decreases from the inlet to the outlet. By setting the mounting cover to a structure with a gradually decreasing inner diameter, when the fan is running, the airflow velocity increases as it flows through the gradually decreasing channel, forming a local high-speed airflow zone, effectively blowing away heat from the busbar and cable connections. Enclosing the busbar within the mounting cover prevents disorderly diffusion of airflow within the large space of the box, allowing the cooling airflow to precisely act on the core heat-generating area, thus improving heat dissipation efficiency.

Description

Technical Field

[0001] This application relates to the technical field of cable branch boxes, and in particular to a cable branch box. Background Technology

[0002] Cable distribution boxes are specialized electrical connection devices used in power distribution systems to collect, distribute, and transfer cable lines. They achieve power distribution and transfer through multiple cables and are widely used in urban power distribution and industrial facilities.

[0003] In related technologies, cable distribution boxes include a box body and a box door. The box door is rotatably connected to the box body. The box body has a placement slot, and a wiring busbar is installed in the placement slot. Multiple cables are electrically connected to the wiring busbar. The box body has a placement hole that connects to the placement slot, and the placement hole allows multiple cables to pass through.

[0004] In actual high-power transmission scenarios, the current flowing through the cables is large, which causes a lot of heat to be generated in the cable body and the busbar. Due to the limited internal space structure of the enclosure, multiple cables often gather in a small space after being connected to the busbar, lacking effective spacing and heat dissipation gaps between them. This dense arrangement not only hinders the radiation and convection of heat, but also easily causes local heat accumulation. Long-term operation may also accelerate the aging of insulation materials and cause electrical faults, thus posing a hidden danger to the safe and stable operation of the power system. Summary of the Invention

[0005] To address the issue of low heat dissipation efficiency among multiple cables, this application provides a cable branch box.

[0006] This application provides a cable branch box, which adopts the following technical solution: A cable branch box includes a box body with a placement groove. A busbar is provided in the placement groove, and multiple cables are provided on the busbar. A mounting cover is provided in the placement groove, and the busbar is located inside the mounting cover. The mounting cover has an inlet and an outlet, and a fan is provided at the outlet. The inner diameter of the mounting cover gradually decreases from the inlet to the outlet.

[0007] By adopting the above technical solution, and by setting the mounting cover to a structure with a gradually narrowing inner diameter, when the fan is running, the airflow velocity increases as it flows through the narrowing channel, forming a local high-speed airflow zone, which effectively blows away the heat at the wiring busbar and cable connection. Enclosing the wiring busbar inside the mounting cover avoids the disorderly diffusion of airflow in the large space of the enclosure, allowing the cooling airflow to act precisely on the core heat-generating area, thus improving heat dissipation efficiency.

[0008] Optionally, a pressure plate is provided on the inner wall of the mounting cover, and the pressure plate is inclined toward the outlet.

[0009] By adopting the above technical solution, the inclined pressurizing plate forms a local constriction or guiding structure in the airflow channel, which performs secondary compression on the airflow, further improving the airflow velocity and enhancing the heat transfer coefficient; the pressurizing plate can guide the straight-flowing airflow to specific parts of the wiring busbar or cable (such as the connection point), avoiding insufficient heat dissipation in certain areas due to airflow "short circuit".

[0010] Optionally, the mounting cover has mounting holes on its side, and the pressure plate is mounted in the mounting holes.

[0011] By adopting the above technical solution, the pressure plate is designed to be assembled through mounting holes, rather than being integrally formed with the mounting cover, which reduces the complexity of the mold and facilitates production and manufacturing. According to different heat dissipation requirements or cable routing density, pressure plates with different tilt angles or shapes can be replaced, which improves the versatility and adaptability of the product.

[0012] Optionally, the mounting hole has multiple receiving grooves on its wall, and the multiple receiving grooves are distributed along the height direction of the mounting cover. The pressure plate is provided with receiving blocks for inserting into the receiving grooves, and the mounting hole is located near the connection between the wiring busbar and the cable.

[0013] By adopting the above technical solution, the pressure plate can be adjusted in multiple levels in the height direction through the cooperation of the receiving groove and the receiving block. Since the mounting hole is located near the connection point, the operator can adjust the pressure plate to the optimal guiding position according to the actual wiring position of the cable, so as to achieve precise "point-to-point" cooling of the connection point with the most severe heat generation.

[0014] Optionally, the mounting cover is provided with a mounting bracket for placing multiple cables. The mounting bracket is located inside the mounting cover and has an elastic strip for clamping the cables.

[0015] By adopting the above technical solution, multiple cables are arranged in an orderly manner using an installation frame, and elastic strips are used to separate and clamp the cables, avoiding the stacking and close contact between the cables, ensuring air gaps between the cables, which is conducive to heat dissipation from the cable surface; the elastic strips also act as a buffer while clamping the cables, reducing the risk of cable insulation wear caused by fan operation or external vibration.

[0016] Optionally, the mounting bracket has a guide hole on its surface facing the cable, and the mounting cover has a fixing tube for insertion into the guide hole.

[0017] By adopting the above technical solution, after the fixed tube is inserted into the guide hole, some of the high-pressure airflow can be directly guided to the contact surface between the mounting bracket and the cable or the bottom of the cable, realizing "back cooling" and solving the problem of poor heat dissipation at the contact surface between the cable and the bracket in the traditional solution; while serving as a guide structure, the fixed tube also plays a role in positioning and fixing the mounting bracket, reducing the use of additional fasteners and making the structure more compact.

[0018] Optionally, a first flow channel with a connecting guide hole is formed on the outer surface of the mounting bracket, and the first flow channel is inclined towards the outlet.

[0019] By adopting the above technical solution, the first flow channel directs part of the airflow to the outlet direction (i.e., the fan end) to cool the end of the cable near the busbar. The two ends of the cable are usually poorly ventilated due to bending radius limitations or sealing structures. By setting up directional flow channels, effective heat dissipation is ensured for the entire length of the cable, especially at both ends, thus achieving all-round thermal management of the cable.

[0020] Optionally, the housing is provided with heat dissipation holes, and the inner diameter of the outlet is provided with a threaded tube, which is inclined toward the heat dissipation holes.

[0021] By adopting the above technical solution, the airflow discharged by the fan will form a rotating airflow when it passes through the outlet of the threaded pipe. Compared with the direct flow, the swirling flow has a longer flow path and stronger turbulence characteristics, which can carry heat more fully. The inclined threaded pipe guides the swirling flow to be discharged precisely towards the heat dissipation hole, which effectively prevents the high-temperature exhaust gas from being retained in the box or flowing back to the inlet of the mounting cover through the gap, thus ensuring the unidirectionality and high efficiency of the heat dissipation system.

[0022] In summary, this application includes at least one of the following beneficial technical effects: By setting the mounting cover to a structure with a gradually narrowing inner diameter, when the fan is running, the airflow velocity increases as it flows through the narrowing channel, forming a local high-speed airflow zone that effectively blows away the heat from the wiring busbar and cable connections. Enclosing the wiring busbar inside the mounting cover prevents the airflow from spreading disorderly within the large space of the enclosure, allowing the cooling airflow to act precisely on the core heat-generating area and improving heat dissipation efficiency.

[0023] With the cooperation of the receiving groove and the receiving block, the pressure plate can be adjusted in multiple levels in the height direction. Since the mounting hole is located near the connection point, the operator can adjust the pressure plate to the optimal guiding position according to the actual wiring position of the cable, so as to achieve "point-to-point" precise cooling of the connection point with the most severe heat generation. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 It is along Figure 1Sectional view of line AA in the middle; Figure 3 This is a schematic diagram of the structure highlighting the mounting cover in the embodiments of this application; Figure 4 yes Figure 3 Enlarged schematic diagram of part B; Figure 5 This is a schematic diagram of the structure highlighting the guide hole in the embodiment of this application; Figure 6 yes Figure 2 An enlarged schematic diagram of section C.

[0025] Reference numerals: 1. Box body; 11. Box door; 12. Placement slot; 13. Heat dissipation hole; 2. Mounting cover; 21. Inlet; 22. Outlet; 221. Threaded pipe; 23. Fan; 24. Extension pipe; 25. Mounting bracket; 251. Mounting rod; 252. Mounting strip; 253. Elastic strip; 254. Guide hole; 255. Fixed pipe; 256. First flow channel; 257. Second flow channel; 26. Mounting hole; 261. Receiving slot; 27. Pressure plate; 271. Receiving block; 272. Pressure bar; 3. Wiring busbar; 31. Cable. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0027] This embodiment discloses a cable branch box. (Refer to...) Figure 1 A cable branch box includes a box body 1 and a box door 11, the box door 11 being rotatably connected to the box body 1.

[0028] Reference Figure 2 The housing 1 has a placement slot 12 for placing electrical components. A mounting cover 2 is located inside the placement slot 12, with an inlet 21 and an outlet 22. The inlet 21 is located on the side of the outlet 22 closest to the ground. The mounting cover 2 is frustum-shaped, meaning its inner diameter gradually decreases from the inlet 21 to the outlet 22.

[0029] Reference Figure 2 Multiple fans 23 are fixedly connected to the outlet 22 of the mounting cover 2. The fans 23 are used to drive the air inside the mounting cover 2 to flow from the inlet 21 to the outlet 22. A heat dissipation hole 13 is provided on the side of the housing 1, which connects to the placement groove 12, and is located on the side of the mounting cover 2 away from the ground. Multiple threaded pipes 221 are fixedly connected to the outlet 22. Threaded grooves are provided on the inner wall of the threaded pipes 221, and the threaded grooves are inclined towards the heat dissipation hole 13 so that the hot air inside the mounting cover 2 can be directly discharged from the housing 1 through the heat dissipation hole 13, and the hot air can drive the air in the placement groove 12 to flow rapidly.

[0030] Reference Figure 2 and Figure 3 Multiple busbars 3 are fixedly connected inside the mounting cover 2, and cables 31 are fixedly connected to each busbar 3. The cables 31 and the busbars 3 are electrically connected to each other. An extension tube 24 is fixedly connected to the outer surface of the mounting cover 2, and the extension tube 24 allows multiple cables 31 to extend out.

[0031] Reference Figure 3 and Figure 4 The mounting cover 2 contains a mounting frame 25, which includes a mounting rod 251 and multiple mounting strips 252. The multiple mounting strips 252 are integrally formed on the mounting rod 251, and the cables 31 are placed between the multiple mounting strips 252. The multiple mounting strips 252 are distributed in a circumferential array along the mounting rod 251.

[0032] Reference Figure 4 Elastic strips 253 are fixedly connected to the surfaces of opposite sides of the mounting strip 252. The elastic strips 253 bend and deform in the direction of the other elastic strip 253 to achieve clamping and fixing of the cable 31 by the two elastic strips 253.

[0033] Reference Figure 4 A guide hole 254 is provided on the end of the mounting strip 252 away from the mounting rod 251. The guide hole 254 extends through the mounting rod 251, meaning that multiple guide holes 254 are interconnected. The guide holes 254 are inclined, meaning that the opening of the guide hole 254 is located on the side of the mounting strip 252 facing the cable 31, so that air in the guide hole 254 can flow towards the cable 31 to reduce the surface temperature of the cable 31.

[0034] Reference Figure 4 Multiple fixing tubes 255 are fixedly connected to the extension tube 24. One end of the fixing tube 255 is located inside the mounting cover 2, and the other end of the fixing tube 255 is located outside the extension tube 24. Each fixing tube 255 can be inserted into different guide holes 254 to fix the fixing tube 255 to the mounting bracket 25, and allow outside air to flow from the fixing tube 255 to the guide holes 254.

[0035] Reference Figure 2 and Figure 5 A first flow channel 256 is formed on the side of the mounting strip 252, and a second flow channel 257 is formed on the side of the adjacent mounting strip 252. Both the first flow channel 256 and the second flow channel 257 are connected to the guide hole 254, and both the first flow channel 256 and the second flow channel 257 extend along the length of the mounting strip 252. The first flow channel 256 extends towards the outlet 22, and the second flow channel 257 extends towards the mounting cover 2, so that air can flow towards the outlet 22 and the mounting cover 2 to remove heat from the cable 31.

[0036] Reference Figure 6 Two mounting holes 26 are provided on the side of the mounting cover 2, extending along the height direction of the mounting cover 2. The mounting holes 26 are located near the connection point between the busbar 3 and the cable 31. Multiple receiving grooves 261 are provided on the wall of the mounting holes 26, distributed along the height direction of the mounting cover 2. The distance between the receiving groove 261 and the ground gradually increases from one mounting hole 26 to the next, meaning the receiving groove 261 is inclined.

[0037] Reference Figure 2 and Figure 6 A pressure plate 27 is provided inside the mounting hole 26, and receiving blocks 271 are integrally formed on the opposite surfaces of the pressure plate 27. The receiving blocks 271 are used to insert into different receiving slots 261 to adjust the pressure plate 27 to the optimal guiding position, so as to achieve precise "point-to-point" cooling of the connection point with the most severe heat generation. A pressure strip 272 is integrally formed on the surface of the pressure plate 27, and the pressure strip 272 is inclined towards the outlet 22 of the mounting cover 2.

[0038] Reference Figure 2 and Figure 6 When the booster plate 27 is installed at the mounting hole 26, the booster plate 27 is inclined toward the outlet 22, and the booster strip 272 can be further inclined toward the outlet 22. The inclined booster plate 27 forms a local necking or guiding structure in the airflow channel inside the mounting cover 2, which performs secondary compression on the airflow and further improves the airflow speed.

[0039] The implementation principle of a cable branch box in this application embodiment is as follows: the fan 23 is started, allowing airflow to flow from the inlet 21 into the mounting cover 2 to the outlet 22, so that the airflow can quickly remove the heat at the connection between the wiring busbar 3 and the cable 31. Then the airflow can flow quickly along the threaded groove at the outlet 22 to the heat dissipation hole 13, achieving the effect of rapid gas flow in the placement groove 12.

[0040] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of this application should be included within the protection scope of this application.

Claims

1. A cable branch box, comprising a box body (1), wherein a placement groove (12) is provided on the box body (1), a busbar (3) is provided in the placement groove (12), and multiple cables (31) are provided on the busbar (3), characterized in that: The placement slot (12) is provided with an installation cover (2), the wiring busbar (3) is located in the installation cover (2), the installation cover (2) has an inlet (21) and an outlet (22), a fan (23) is provided at the outlet (22), and the inner diameter of the installation cover (2) gradually decreases from the inlet (21) to the outlet (22).

2. A cable branch box according to claim 1, characterized in that: The inner wall of the mounting cover (2) is provided with a pressure plate (27), which is inclined toward the outlet (22).

3. A cable branch box according to claim 2, characterized in that: The mounting cover (2) has a mounting hole (26) on its side, and the pressure plate (27) is mounted in the mounting hole (26).

4. A cable branch box according to claim 3, characterized in that: The mounting hole (26) has multiple receiving grooves (261) on its wall. The multiple receiving grooves (261) are distributed along the height direction of the mounting cover (2). The pressure plate (27) is provided with receiving blocks (271) for inserting into the receiving grooves (261). The mounting hole (26) is located near the connection between the wiring busbar (3) and the cable (31).

5. A cable branch box according to claim 1, characterized in that: The mounting cover (2) is provided with a mounting bracket (25) for placing multiple cables (31). The mounting bracket (25) is located inside the mounting cover (2). The mounting bracket (25) is provided with an elastic strip (253) for clamping the cables (31).

6. A cable branch box according to claim 5, characterized in that: The mounting bracket (25) has a guide hole (254) on its surface facing the cable (31), and the mounting cover (2) has a fixing tube (255) for inserting into the guide hole (254).

7. A cable branch box according to claim 6, characterized in that: The mounting bracket (25) has a first flow channel (256) with a connecting guide hole (254) on its outer surface, and the first flow channel (256) is inclined toward the outlet (22).

8. A cable branch box according to claim 1, characterized in that: The housing (1) has a heat dissipation hole (13), and the inner diameter of the outlet (22) is provided with a threaded tube (221), which is inclined toward the heat dissipation hole (13).

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