Low-voltage cable branch box facilitating heat dissipation

Abstract

The utility model belongs to the technical field of electrical equipment, concretely relates to a low -voltage cable branch box convenient to heat dissipation. Including box, the box side wall is equipped with ventilation module. The ventilation module includes the shell of two end openings, is arranged in the shell two ends and the arc shape direction opposite fairing, and the wind -driven board of hinged in each fairing guide groove, be equipped with the guide surface that is opposite inclination in the shell and form the reduced diameter portion, and the reduced diameter portion is linked together with the box inside. The utility model can adjust the ventilation state from the adaptive wind direction: the wind -driven board is pasted in the continuous guide arc surface of guide groove inner wall when the lateral wind, the wind -driven board opens the guide groove when the front and back wind, effectively promotes the box ventilation heat dissipation performance, and the simple structure is practical.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment technology, specifically relating to a low-voltage cable branch box that facilitates heat dissipation. Background Technology

[0002] Low-voltage cable distribution boxes are used for cable branching and terminal power supply in power distribution networks. The boxes contain a dense array of electrical components such as cable connectors. Due to outdoor sunlight and the heat generated by the components themselves, high temperatures can easily form inside the boxes, leading to insulation aging and even fires.

[0003] Existing low-voltage cable distribution boxes mostly employ passive heat dissipation methods such as ventilation holes or louvers. However, these structures rely solely on natural convection for heat exchange, resulting in low heat dissipation efficiency and severe limitations imposed by the installation orientation. Especially when natural wind blows parallel to the box's sidewalls, airflow cannot effectively enter the box, leading to heat accumulation and posing safety hazards due to prolonged operation of electrical equipment in high-temperature environments. Furthermore, traditional ventilation structures are prone to introducing rainwater or debris in rainy or dusty conditions, further affecting the equipment's operational reliability. Therefore, there is an urgent need for a low-voltage cable distribution box that can adapt to various wind directions, provides rain and dust protection, and possesses highly efficient heat dissipation capabilities. Utility Model Content

[0004] This invention, through the combination of a multi-directional airflow deflector and an openable / closeable wind-driven plate, achieves adaptive guidance of lateral and forward / backward winds, thereby smoothly guiding airflow into the housing and solving the problems mentioned in the background art.

[0005] The technical solution of this utility model is implemented as follows: a low-voltage cable branch box for easy heat dissipation includes a box body, and a ventilation module is provided on the side wall of the box body. The ventilation module includes: The shell has openings at both ends and two relatively inclined flow guide surfaces inside, forming a narrowed section between the two flow guide surfaces, which is connected to the interior of the box. Two flow guides are located at both ends of the shell and have opposite arc directions. Each flow guide has a flow guide groove. Two wind-driven plates are respectively hinged to each of the aforementioned guide slots; When the wind comes from the side, the wind-driven plate adheres to the inner wall of the guide channel under wind pressure and together with the inner wall of the guide shroud, forms a continuous guide arc surface; when the wind comes from the front and back, the wind-driven plate opens the guide channel under wind pressure.

[0006] The present invention is further configured such that the pneumatic plate is hinged to the guide groove by a torsion spring, and the torsion spring is used to provide a restoring elastic force so that the pneumatic plate remains in the normal state of blocking the guide groove.

[0007] The present invention is further configured such that the side of the shell facing the box body has an opening structure, and the opening is closed by the side wall of the box body to form an internal ventilation channel of the shell.

[0008] The present invention is further configured such that an air circulation hole is provided on the side wall of the housing, and an installation plate extends from the side wall of the housing corresponding to the reduced diameter portion toward the housing, and a sleeve is fixed on the installation plate, the sleeve being connected to the air circulation hole.

[0009] The present invention is further configured such that the ventilation module is installed on the upper part of the side wall of the box, and the lower part of the box is provided with an air inlet grille.

[0010] The present invention is further provided that both ends of the shell are covered with breathable protective plates.

[0011] The present invention is further configured such that a positioning hole is provided at the bottom of the housing, a bracket is provided on the side wall of the box to support the housing, and a positioning block matching the positioning hole is provided at the top of the bracket.

[0012] By adopting the above technical solution, the beneficial effects that this utility model can achieve are: 1. By combining the air deflector and the fan plate, the lateral airflow is brought together to form a continuous airflow arc surface and guided to the narrowing section, thus realizing the effective utilization of multi-directional airflow and improving the utilization rate of natural wind and the heat dissipation efficiency of the enclosure.

[0013] 2. By using the mounting plate and the sleeve, the negative pressure zone of the reduced diameter section is connected to the air circulation hole on the side wall of the box, which drives the hot air inside the box to be continuously extracted, thereby improving the efficiency of hot air exhaust.

[0014] 3. By combining the breathable protective plate with the bracket positioning structure, external rainwater and debris are isolated and the module can be quickly supported and positioned, which improves the operational reliability and installation and maintenance efficiency in outdoor environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the assembly status of the ventilation module and the enclosure; Figure 2 This is a three-dimensional structural diagram of the ventilation module; Figure 3 This is a schematic diagram of the cross-sectional structure of the shell; Figure 4 This is a schematic diagram of the ventilation module and enclosure in their unassembled state; Figure 5 This is a schematic diagram of air intake from different wind directions.

[0016] The attached diagram is labeled as follows: 1. Box body; 2. Ventilation module; 3. Shell; 4. Guide surface; 5. Reduction section; 6. Guide shroud; 7. Guide groove; 8. Fan plate; 9. Guide arc surface; 10. Torsion spring; 11. Internal ventilation channel; 12. Air circulation hole; 13. Mounting plate; 14. Sleeve; 15. Air inlet grille; 16. Breathable protective plate; 17. Bracket; 18. Positioning hole; 19. Positioning block. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-5 : Example:

[0018] This embodiment provides a low-voltage cable branch box for easy heat dissipation, including a box body 1, and a ventilation module 2 provided on the side wall of the box body 1. The ventilation module 2 includes: The shell 3 has openings at both ends and two relatively inclined flow guide surfaces 4 inside. A narrowing section 5 is formed between the two flow guide surfaces 4, and the narrowing section 5 is connected to the interior of the box 1. Two flow guides 6 are respectively located at both ends of the housing 3 and have opposite arc directions. Each flow guide 6 has a flow guide groove 7. Two wind-driven plates 8 are respectively hinged to each of the aforementioned guide grooves 7; When the wind comes from the side, the wind-driven plate 8 is pressed against the inner wall of the guide groove 7 by the wind pressure and together with the inner wall of the guide shroud 6, forms a continuous guide arc surface 9; when the wind comes from the front and back, the wind-driven plate 8 opens the guide groove 7 by the wind pressure.

[0019] The shell 3 has a hollow tubular structure with openings at both ends. The side of the shell 3 facing the side wall of the housing 1 is an open structure, and the edge of this opening is fitted to the surface of the side wall of the housing 1. A sealing connection is achieved by bolts and a sealing gasket, thereby closing the open side by the side wall of the housing 1 and forming a complete internal ventilation channel 11. Inside the shell 3, there are two inclined guide surfaces 4 arranged axially opposite each other. These two inclined guide surfaces 4 gradually converge towards the middle of the shell 3, forming a narrowed section 5 with the smallest cross-sectional area at the middle position. This change in cross-sectional area is used to accelerate the airflow and reduce the pressure.

[0020] Two air deflectors 6 are respectively located at the openings at both ends of the housing 3. Both are arc-shaped plate structures with opposite curvature directions. The end edge of each air deflector 6 is fixedly connected to the end of the housing 3 by welding or integral molding. Each air deflector 6 has a rectangular air guide groove 7, which serves as a channel for airflow in and out. The overall shape of the air deflector 6 is used to receive and initially intercept and guide the lateral airflow.

[0021] Two pneumatic plates 8 are respectively hinged within their respective guide channels 7. Each pneumatic plate 8 is hinged to the two side walls of the guide channel 7 via a pin, forming a rotating structure that can rotate around the pin. A torsion spring 10 is sleeved on the pin. One leg of the torsion spring 10 abuts against the inner side wall of the guide channel 7, and the other leg abuts against the side of the pneumatic plate 8 facing away from the outside. This allows the torsion spring 10 to apply a restoring force to the pneumatic plate 8 under normal conditions, forcing the pneumatic plate 8 to remain in the closed state of blocking the guide channel 7. When the wind comes from the side, the wind direction is perpendicular to the rotation axis of the wind-driven plate 8, directly pressing the wind-driven plate 8 to make it fit against the bottom inner wall of the guide channel 7. At this time, the plate surface of the wind-driven plate 8 and the inner wall of the guide shroud 6 are joined together to form a continuous guide arc surface 9. The side wind smoothly turns along this arc surface and enters the interior of the housing 3. When the wind comes from the front and back, the wind direction directly acts on the front of the wind-driven plate 8, overcoming the elastic force of the torsion spring 10 and pushing the wind-driven plate 8 outward, so that the guide channel 7 is in an open state, and the airflow directly enters the housing 3 through the guide channel 7.

[0022] On the side of the housing 3 corresponding to the reduced diameter portion 5 facing the box body 1, a mounting plate 13 extends outward to form a mounting plate 13. This mounting plate 13 is integrally formed with the housing 3 and is located in the middle of the open side of the housing 3. A hollow sleeve 14 is fixedly installed on the side of the mounting plate 13 facing the side wall of the box body 1. The mounting plate 13 has a through hole, and the sleeve 14 passes through the through hole and is fixed to the mounting plate 13 by interference fit or welding. An air circulation hole 12 is provided on the side wall of the box body 1. The end of the sleeve 14 is directly inserted into the air circulation hole 12 and fits tightly against the hole wall, thereby realizing effective communication between the negative pressure area of ​​the reduced diameter portion 5 of the housing 3 and the interior of the box body 1, so that the air inside the box can be continuously extracted through the sleeve 14.

[0023] On the outer sides of the openings at both ends of the housing 3, a breathable protective plate 16 is provided. The breathable protective plate 16 is detachably installed on the periphery of the air guide 6 by edge buckles or bolts. The surface of the protective plate is densely covered with mesh holes for airflow. The mesh hole diameter is smaller than the size of ordinary dust particles and insects, which is used to block rainwater, debris and small animals from entering the housing 3 and the air guide 6, while not affecting the normal flow of air.

[0024] Ventilation module 2 is installed on the upper part of the side wall of housing 1. A corresponding air inlet grille 15 is located at the lower part of housing 1. This grille consists of multiple downward-sloping blades, through which cool air enters the interior of housing 1. A support bracket 17 is also bolted to the lower part of the side wall of housing 1. This bracket 17 has a horizontal support surface, and a positioning block 19 protrudes from the top of the bracket 17. A positioning hole 18 matching the shape and size of the positioning block 19 is provided at the bottom of the housing 3. During installation, the positioning block 19 is directly inserted into the positioning hole 18, allowing it to settle under gravity and achieve lateral positioning support through surface friction. Combined with the bolts securing the housing 3 to the side wall of housing 1, reliable installation of ventilation module 2 is completed.

[0025] In actual operation, when a side wind blows, the airflow first impacts the corresponding side's guide shroud 6. Due to the guiding effect of the continuous guiding arc surface 9 formed by the guide shroud 6 and the fan plate 8, the airflow is smoothly redirected and guided into the interior of the housing 3. When the airflow passes through the narrowing section 5, the flow velocity increases and the pressure drops significantly, forming a low-pressure zone. This low-pressure zone is connected to the air circulation hole 12 on the side wall of the housing 1 through the sleeve 14 on the mounting plate 13. Based on the Venturi effect, the stable low-pressure zone continuously draws in hot air from the housing through the sleeve 14, achieving ventilation and heat dissipation. At the same time, the guide shroud 6 at the other end, due to its opposite arc direction, has its internal fan plate 8 sealed to prevent external airflow from directly entering the exhaust port and causing airflow collision. When a front-to-back wind blows, the airflow pushes open the fan plates 8 at both ends and passes directly along the axial direction of the housing 3, similarly generating negative pressure in the narrowing section 5 to draw in air from the housing. The cold air supplied by the air intake grille 15 at the bottom of the box 1 flows upward after entering, forming convection with the hot air, thereby achieving effective exhaust of the overall heat in the branch box.

[0026] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A low-voltage cable branch box for easy heat dissipation, comprising a box body (1), characterized in that, The side wall of the enclosure (1) is provided with a ventilation module (2), the ventilation module (2) comprising: The shell (3) has openings at both ends and two relatively inclined guide surfaces (4) inside. A narrowed section (5) is formed between the two guide surfaces (4), and the narrowed section (5) is connected to the inside of the box (1). Two flow guides (6) are respectively located at both ends of the housing (3) and have opposite arc directions. Each flow guide (6) has a flow guide groove (7). Two wind-driven plates (8) are respectively hinged to each of the aforementioned guide grooves (7); When the wind comes from the side, the wind-driven plate (8) is pressed against the inner wall of the guide groove (7) by the wind pressure and together with the inner wall of the guide shroud (6) to form a continuous guide arc surface (9); when the wind comes from the front and back, the wind-driven plate (8) opens the guide groove (7) by the wind pressure.

2. The low-voltage cable branch box for easy heat dissipation according to claim 1, characterized in that, The pneumatic plate (8) is hinged to the guide groove (7) by a torsion spring (10). The torsion spring (10) is used to provide a reset force so that the pneumatic plate (8) keeps the guide groove (7) in a normal state.

3. A low-voltage cable branch box for easy heat dissipation according to claim 1, characterized in that, The shell (3) has an opening on the side facing the box (1), and the opening is closed by the side wall of the box (1) to form an internal ventilation channel (11) of the shell (3).

4. A low-voltage cable branch box for easy heat dissipation according to claim 3, characterized in that, The side wall of the housing (1) is provided with an air circulation hole (12). The housing (3) has a mounting plate (13) extending from the side wall of the corresponding reduced diameter part (5) towards the housing (1). A sleeve (14) is fixed on the mounting plate (13). The sleeve (14) is connected to the air circulation hole (12).

5. A low-voltage cable branch box for easy heat dissipation according to claim 1, characterized in that, The ventilation module (2) is installed on the upper part of the side wall of the box (1), and the lower part of the box (1) is provided with an air inlet grille (15).

6. A low-voltage cable branch box for easy heat dissipation according to claim 1, characterized in that, Both ends of the housing (3) are covered with breathable protective plates (16).

7. A low-voltage cable branch box for easy heat dissipation according to claim 1, characterized in that, The bottom of the housing (3) is provided with a positioning hole (18), and the side wall of the box (1) is provided with a bracket (17) to support the housing (3). The top of the bracket (17) is provided with a positioning block (19) that matches the positioning hole (18).

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