Active cooling cable branch box

Abstract

The application relates to the technical field of power equipment, in particular to an active cooling cable branch box, which comprises a box body with a top through hole, the upper part of the box body is closed through a cooling mechanism, the cooling mechanism comprises an inner baffle and an outer baffle which are connected and disconnected through a connecting device, the outer baffle is opened outward on the side, the inner baffle is in a back-to-back structure and is sleeved on the upper part of the box body, the connecting device is controlled by a controller, when the room temperature in the box body is not high, the inner air-permeable groove and the outer air-permeable groove are vertically dislocated, the outer baffle is lifted and the inner air-permeable groove and the outer air-permeable groove are transversely penetrated, when it is sunny and the room temperature is high, the outer baffle and the inner baffle are synchronously lifted. The application can realize different heat dissipation states according to different temperatures in the box, when the temperature is not too high, the outer baffle is moved upward to increase the contact space with the external cavity, and better heat dissipation is realized, when the above-mentioned mode cannot achieve good cooling, the fan can be started to accelerate air flow and realize heat dissipation.

Description

Technical Field

[0001] This invention belongs to the field of power equipment technology, specifically an active cooling cable branch box. Background Technology

[0002] Cable distribution boxes are crucial equipment in power distribution networks, used for cable branching, splicing, and power distribution. They are widely used in urban power grid upgrades, residential power distribution, and industrial park power supply. With the continuous growth of electricity load and the increasing prevalence of high outdoor temperatures, heat accumulates inside the cable distribution box due to factors such as cable joint resistance loss and load current generation, leading to a significant increase in internal temperature. If this heat cannot be dissipated in time, it will accelerate the aging of the insulation materials inside the box, increase contact resistance, and even cause safety accidents such as short circuits and fires, seriously affecting the reliability of power supply.

[0003] To address the heat dissipation issue inside cable distribution boxes, existing technologies primarily employ ventilation slots on the side walls or top of the box, utilizing natural air convection for heat exchange. However, this method relies on natural convection, resulting in slow airflow and low heat exchange efficiency. Especially under conditions of high temperature, high load, or poor ventilation at the box's installation location, the cooling effect is very limited, failing to meet the temperature requirements for safe equipment operation. Therefore, it is often necessary to enlarge the air inlet. Since some cable distribution boxes are located outdoors, enlarging the air inlet allows rainwater to directly enter the box under strong wind conditions, potentially causing short circuits or corrosion. Summary of the Invention

[0004] This invention provides an active cooling cable branch box to overcome the deficiencies in the prior art.

[0005] This invention is achieved through the following technical solution: An active cooling cable distribution box includes a box body with a through top. The upper part of the box body is closed by a cooling mechanism. The cooling mechanism includes an inner baffle and an outer baffle connected and disconnected by a connecting device. The outer baffle opens outwards on its sides. The inner baffle has a U-shaped structure and fits over the upper part of the box body. The inner baffle is supported by a fixed support block. The top of the outer baffle is closed and inverted on the inner baffle. The lower part of the sides of the inner baffle and the outer baffle are respectively provided with an inner vent groove and an outer vent groove. The outer baffle is... An electric telescopic rod, fixedly installed inside the enclosure, supports the lifting and lowering of the enclosure. The temperature inside the enclosure is sensed by a temperature control mechanism, which controls the lifting and lowering of the electric telescopic rod. A rain sensor is installed on the top surface of the outer baffle. The rain sensor is connected to the controller, and the connecting device is controlled by the controller. When the temperature inside the enclosure is not high, the inner and outer ventilation channels are misaligned vertically. When the temperature inside the enclosure rises and it is raining, the connecting device is disconnected, the outer baffle rises, and the inner and outer ventilation channels are horizontally connected. When it is sunny and the temperature rises, the outer and inner baffles rise synchronously.

[0006] In normal use, the hot air generated by the enclosure enters the space between the outer and inner baffles through the inner ventilation channels. Since the outer baffle is open, heat dissipation is ensured. When the temperature inside the enclosure continues to rise and it is not raining outside, the temperature control mechanism senses the outside temperature and, upon reaching the required cooling temperature, controls the extension of the electric telescopic rod. Since there is no rain, the connecting device is in the connected state, causing the outer baffle to move upwards under the extension of the electric telescopic rod, simultaneously moving the inner baffle upwards. The inner baffle detaches from the upper part of the enclosure, increasing the contact space with the outside environment for better heat dissipation. When it rains outside, the rain sensor transmits a signal to the controller, which then disconnects the connecting device. The outer baffle moves upwards, creating a misalignment with the inner baffle. As the outer baffle moves upwards, the distance between its side and the inner baffle increases, further improving heat dissipation. Simultaneously, due to the increased distance, even if rainwater enters the outer ventilation channel, it loses its power and cannot enter the inner ventilation channel, thus protecting the internal circuitry and ensuring both cooling and better protection of internal components.

[0007] Preferably, fan blades are symmetrically arranged on both sides inside the inner baffle. Each fan blade is driven by a rotating shaft, which is rotated by a drive motor. The drive motor is controlled by a temperature controller and activates when the temperature continues to rise after the outer baffle is raised. If the temperature remains too high after the outer baffle is raised, the drive motor is activated, causing the rotating shaft to rotate, which in turn rotates the fan blades, accelerating airflow and achieving better cooling.

[0008] Preferably, the temperature control system includes a heat-conducting pipe, one end of which is closed and the other end is slidably sealed with a piston. Mercury is filled between the piston and the heat-conducting pipe. A moving rod is vertically connected to the outer side of the piston, and a signal transmitting unit is provided on the moving rod. A first receiving unit and a second receiving unit are fixedly arranged inside the housing along the moving direction of the moving rod. Both the first and second receiving units include a closing unit and a starting unit arranged along the moving direction of the moving rod. The first receiving unit controls the raising and lowering of the electric telescopic rod, and the second receiving unit controls the start and stop of the drive motor. As the temperature rises, the mercury expands, pushing the piston to move. The piston drives the moving rod to move, so that the moving rod passes through the first receiving unit and the second receiving unit respectively. The rod opens when it passes the starting unit and closes when it passes the closing unit. The rising temperature causes expansion, so that when the moving rod moves to the first receiving unit, the electric telescopic rod can be raised and lowered. Continued expansion allows it to move to the second receiving unit, thus starting the drive motor.

[0009] Preferably, the connecting device includes an electromagnet and an iron sheet. The iron sheet is fixedly connected to one end of a side rod, and the other end of the side rod is fixedly connected to the outer side of the inner baffle. The electromagnet is fixedly connected to one end of a connecting rod and can contact the iron sheet. The other end of the connecting rod is fixedly connected to the inner wall of the outer baffle. When the electromagnet is energized, it attracts the iron sheet, realizing the connection state of the connecting device. When the electromagnet is de-energized, the connecting device is in the disconnected state.

[0010] Preferably, driven bevel gears are coaxially fixedly connected to opposite ends of the rotating shaft. These two driven bevel gears mesh with a driving bevel gear. The driving bevel gear is fixedly sleeved on a round rod, which also has a driven gear fixedly sleeved on it. This driven gear meshes with a driving gear fixedly sleeved on a drive motor. The round rod extends upwards through an outer baffle, and the extension point is rotatably connected via a sealed bearing. A fan wheel is mounted at the upper end of the round rod, and the motor is an asynchronous motor. When there is wind, the wind drives the fan wheel to rotate, which in turn drives the round rod to rotate, which in turn drives the driving bevel gear to rotate. This, in turn, drives the driven bevel gear to rotate, which in turn drives the rotating shaft to rotate, thus accelerating the airflow inside the housing using wind energy. The rotation of the round rod drives the driven gear to rotate, which in turn drives the driving gear to rotate. Using an asynchronous motor allows the motor to easily idle under external force even after power is cut off.

[0011] Preferably, a support rod is vertically connected to the round rod, and a cleaning brush is installed on the support rod. The rain sensor is cleaned by the cleaning brush. The rotation of the round rod can also drive the support rod to rotate, which in turn drives the cleaning brush to clean the rain sensor. In addition, the wind power can not only accelerate the air flow inside the box, but also clean the dust that falls on the rain sensor, ensuring its accuracy.

[0012] Preferably, both the inner and outer ventilation grooves are inclined grooves that slope downwards from the inside out.

[0013] Preferably, the heat pipe is provided with heat exchange fins that extend into the mercury.

[0014] Preferably, a vertical rod is vertically connected to the inner wall of the top surface of the outer baffle, and a through hole is opened horizontally on the vertical rod. The rotating shaft passes through the through hole and is rotatably connected to the through hole through a bearing.

[0015] The beneficial effects of this invention are as follows: Firstly, the use of this application can achieve different heat dissipation states according to different temperatures inside the box. When the temperature is not too high, the outer baffle is moved upward to increase the contact space with the external cavity, thereby achieving better heat dissipation. When this method still cannot cool down well, the fan can be started to accelerate airflow and achieve heat dissipation. At the same time, under the premise of satisfying the above conditions, depending on whether the weather is rainy or sunny, the method of raising and lowering the outer baffle separately or raising and lowering the outer baffle and the inner baffle simultaneously can prevent rainwater from entering and corroding the components while satisfying heat dissipation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is the state of the outer baffle after the temperature rises following rain. Figure 3 This is the state of the outer baffle after the temperature rises on a sunny day; Figure 4 yes Figure 1 A magnified view of part of I; Figure 5 yes Figure 1 Part II enlarged view.

[0018] As shown in the figure: 1. Housing, 2. Outer baffle, 3. Inner baffle, 4. Outer ventilation slot, 5. Inner ventilation slot, 6. Electric telescopic rod, 7. Electromagnet, 8. Fan blade, 9. Driving bevel gear, 10. Driven bevel gear, 11. Round rod, 12. Driving gear, 13. Driven gear, 14. Drive motor, 15. Rain sensor, 16. Sweeping brush, 17. Heat pipe, 18. Moving rod, 19. First receiving unit, 20. Second receiving unit, 191. Shutdown unit, 192. Start-up unit. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0020] An active cooling cable branch box, such as Figures 1-5As shown. It includes a box 1 with a through top. The upper part of the box 1 is closed by a cooling mechanism. The cooling mechanism includes an inner baffle 3 and an outer baffle 2 connected and disconnected by a connecting device. The outer baffle 2 opens outwards on its sides. The inner baffle 3 has a U-shaped structure and fits over the upper part of the box 1. The inner baffle 3 is supported by a fixed support block. The outer baffle 2 is closed at the top and inverted on top of the inner baffle 3. The lower part of the sides of the inner baffle 3 and the outer baffle 2 are respectively provided with an inner ventilation groove 5 and an outer ventilation groove 4. The outer baffle 2 is fixedly mounted on... The electric telescopic rod 6 inside the box 1 supports the lifting and lowering. The temperature inside the box 1 is sensed by the temperature control mechanism and the electric telescopic rod 6 is raised and lowered accordingly. A rain sensor is installed on the top surface of the outer baffle 2. The rain sensor is connected to the controller signal. The connecting device is controlled by the controller. When the temperature inside the box 1 is not high, the inner ventilation groove 5 and the outer ventilation groove 4 are misaligned vertically. When the temperature inside the box rises and it is raining, the connecting device is disconnected, the outer baffle 2 rises and the inner ventilation groove 5 and the outer ventilation groove 4 are horizontally connected. When it is sunny and the temperature rises, the outer baffle 2 and the inner baffle 3 rise synchronously.

[0021] In use, under normal conditions, the hot air generated by the housing 1 enters between the outer baffle 2 and the inner baffle 3 through the inner ventilation groove 5. Since the outer baffle 2 is open, heat dissipation is guaranteed. When the temperature inside the housing 1 continues to rise and it is not raining outside, the temperature control mechanism senses the outside temperature and, after reaching the required cooling temperature, controls the electric telescopic rod 6 to extend. Since it is not raining outside, the connecting device is in the connected state. As a result, the outer baffle 2 moves upward under the extension of the electric telescopic rod 6, which drives the inner baffle 3 to move upward synchronously. The inner baffle 3 detaches from the upper part of the housing 1, thereby increasing the contact space with the outside and achieving better heat dissipation. When it rains outside, the rain sensor 15 sends a signal to the controller, which then controls the connection device to be disconnected. The outer baffle 2 moves upward and is misaligned with the inner baffle 3. When the outer baffle 2 moves upward, the distance between its side and the inner baffle 3 increases, which can achieve better heat dissipation. At the same time, due to the increased distance, even if rainwater enters the outer permeable channel, it will lose its power and cannot enter the inner permeable channel, thus protecting the internal circuit. This ensures that cooling is achieved while better protecting the internal components.

[0022] Fan blades 8 are symmetrically arranged on both sides inside the inner baffle 3. Each fan blade 8 is driven by a rotating shaft, which is rotated by a drive motor 14. The drive motor 14 is controlled by temperature control and activates when the temperature continues to rise after the outer baffle 2 is raised. If the temperature remains too high after the outer baffle 2 is raised, the drive motor 14 is activated, causing the rotating shaft to rotate, which in turn rotates the fan blades 8, accelerating airflow and achieving better cooling.

[0023] The temperature control system includes a heat pipe 17, one end of which is closed and the other end is slidably sealed with a piston. Mercury is filled between the piston and the heat pipe 17. A moving rod 18 is vertically connected to the outer side of the piston. A signal transmitting unit is provided on the moving rod 18. A first receiving unit 19 and a second receiving unit 20 are fixedly arranged in the housing 1 along the moving direction of the moving rod 18. Both the first receiving unit 19 and the second receiving unit 20 include a closing unit 191 and a starting unit 192 arranged along the moving direction of the moving rod 18. The first receiving unit 19 controls the raising and lowering of the electric telescopic rod 6, and the second receiving unit 20 controls the start and stop of the drive motor 14. As the temperature rises, the mercury expands, pushing the piston to move. The piston then moves the moving rod 18, which passes through the first receiving unit 19 and the second receiving unit 20. The moving rod 18 is activated when it passes the starting unit 192 and deactivated when it passes the closing unit 191. The increased temperature causes the moving rod 18 to expand, enabling the electric telescopic rod 6 to rise and fall when it reaches the first receiving unit 19. Continued expansion allows it to move to the second receiving unit 20, activating the drive motor 14.

[0024] The connecting device includes an electromagnet 7 and an iron sheet. The iron sheet is fixedly connected to one end of a side rod, and the other end of the side rod is fixedly connected to the outer side of the inner baffle 3. The electromagnet 7 is fixedly connected to one end of a connecting rod and can contact the iron sheet. The other end of the connecting rod is fixedly connected to the inner wall of the outer baffle 2. When the electromagnet 7 is energized, it attracts the iron sheet, realizing the connection state of the connecting device. When the electromagnet 7 is de-energized, the connecting device is in the disconnected state.

[0025] Two driven bevel gears 10 are coaxially fixedly connected to opposite ends of the rotating shaft. The two driven bevel gears 10 mesh with the driving bevel gear 9. The driving bevel gear 9 is fixedly sleeved on the round rod 11. A driven gear 13 is also fixedly sleeved on the round rod 11. The driven gear 13 meshes with the driving gear 12 fixedly sleeved on the drive motor 14. The round rod 11 extends upward through the outer baffle 2, and the protrusion is rotatably connected by a sealed bearing. A fan wheel is provided at the upper end of the round rod 11. The motor is an asynchronous motor. When there is wind outside, the wind drives the fan wheel to rotate. The rotation of the fan wheel drives the round rod 11 to rotate, which in turn drives the driving bevel gear 9 to rotate, thereby rotating the driven bevel gears 10 and driving the rotating shaft to rotate. This accelerates the airflow inside the housing 1 by using wind energy. The rotation of the round rod 11 drives the driven gear 13 to rotate, which in turn drives the driving gear 12 to rotate. By using an asynchronous motor, it is possible to easily idle under external force after the motor is powered off.

[0026] A support rod is vertically connected to the round rod 11, and a cleaning brush 16 is installed on the support rod. The rain sensor 15 is cleaned by the cleaning brush 16. The rotation of the round rod 11 can also drive the support rod to rotate, which in turn drives the cleaning brush 16 to clean the rain sensor 15. In addition, with the help of wind power, not only can the air flow inside the housing 1 be accelerated, but the dust falling on the rain sensor can also be cleaned to ensure its accuracy.

[0027] Both the inner ventilation groove 5 and the outer ventilation groove 4 are inclined grooves that slope downwards from the inside out.

[0028] A removable insect-proof net can be installed on the top of the box 1.

[0029] The heat pipe 17 is equipped with heat exchange fins that extend into the mercury.

[0030] A vertical rod is vertically connected to the inner wall of the top surface of the outer baffle 2. The vertical rod has a through hole in the horizontal direction. The rotating shaft passes through the through hole and is rotatably connected to the through hole through a bearing.

[0031] This application mainly includes two cooling methods. The first method is that when the temperature reaches the first temperature level, the outer baffle 2 moves upward to achieve cooling. When the first temperature level continues to rise to the second temperature level, the fan blades 8 open to accelerate airflow.

[0032] This application also includes two cooling methods under different conditions, both of which are suitable for both conditions.

[0033] On rainy days, only the outer baffle 2 rises, which cools the room without letting in rain. On sunny days, the inner baffle 3 and the outer baffle 2 rise simultaneously, allowing more space to be opened for cooling and ensuring a better cooling effect.

[0034] The application of this technology can firstly achieve different heat dissipation states according to different temperatures inside the chamber. When the temperature is not too high, the outer baffle 2 is moved upward to increase the contact space with the external cavity, thereby achieving better heat dissipation. When this method is still not enough to cool down the temperature, the fan can be turned on to accelerate airflow and achieve heat dissipation. At the same time, under the premise of meeting the above conditions, depending on whether the weather is rainy or sunny, the outer baffle 2 can be raised and lowered separately, or the outer baffle 2 and the inner baffle 3 can be raised and lowered simultaneously. This can prevent rainwater from entering and corroding the components while meeting the heat dissipation requirements.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cable branch box with active cooling, characterized in that: The enclosure includes a top-through box, the upper part of which is sealed by a cooling mechanism. This cooling mechanism includes an inner baffle and an outer baffle connected and disconnected by a connecting device. The outer baffle opens outwards on its sides. The inner baffle has a U-shaped structure and fits over the upper part of the box, supported by a fixed support block. The top of the outer baffle is closed and inverted onto the inner baffle. The lower parts of the sides of the inner and outer baffles are respectively provided with inner and outer ventilation slots. The outer baffle is supported and raised / lowered by an electric telescopic rod fixed inside the box. The temperature inside the box is sensed by a temperature control mechanism, which controls the raising and lowering of the electric telescopic rod. A rain sensor is installed on the top surface of the outer baffle, connected to a controller. The connecting device is controlled by the controller. When the temperature inside the box is low, the inner and outer ventilation slots are vertically misaligned. When the temperature inside the box rises and it rains, the connecting device disconnects, the outer baffle rises, and the inner and outer ventilation slots become horizontally connected. On sunny days and when the temperature rises, the outer and inner baffles rise synchronously.

2. The cable branch box with active cooling according to claim 1, characterized in that: The inner baffle has symmetrical fan blades on both sides inside. The fan blades are all driven by a rotating shaft. The rotating shaft is driven to rotate by a drive motor. The drive motor is started and stopped by temperature control and is turned on when the temperature continues to rise after the outer baffle is raised.

3. The cable branch box with active cooling according to claim 2, characterized in that: The temperature control system includes a heat pipe, one end of which is closed and the other end is slidably sealed with a piston. Mercury is filled between the piston and the heat pipe. A moving rod is vertically connected to the outer side of the piston. A signal transmitting unit is provided on the moving rod. A first receiving unit and a second receiving unit are fixedly arranged in the housing along the moving direction of the moving rod. Both the first receiving unit and the second receiving unit include a closing unit and a starting unit arranged along the moving direction of the moving rod. The first receiving unit controls the raising and lowering of the electric telescopic rod, and the second receiving unit controls the start and stop of the drive motor.

4. The cable branch box with active cooling according to claim 3, characterized in that: The connecting device includes an electromagnet and an iron sheet. The iron sheet is fixedly connected to one end of the side rod, and the other end of the side rod is fixedly connected to the outer side of the inner baffle. The electromagnet is fixedly connected to one end of the connecting rod and can contact the iron sheet. The other end of the connecting rod is fixedly connected to the inner wall of the outer baffle.

5. The cable branch box with active cooling according to claim 4, characterized in that: Two driven bevel gears are coaxially fixedly connected to opposite ends of the rotating shaft. The two driven bevel gears mesh with the driving bevel gear. The driving bevel gear is fixedly sleeved on the round rod. A driven gear is also fixedly sleeved on the round rod. The driven gear meshes with the driving gear fixedly sleeved on the drive motor. The round rod extends upward through the outer baffle and is rotatably connected through a sealed bearing at the point of extension. A fan wheel is provided at the upper end of the round rod. The motor is an asynchronous motor.

6. The cable branch box with active cooling according to claim 5, characterized in that: A support rod is vertically connected to the round rod, and a cleaning brush is installed on the support rod. The rain sensor is cleaned by the cleaning brush.

7. The cable branch box with active cooling according to claim 6, characterized in that: Both the inner and outer ventilation grooves are inclined grooves that slope downwards from the inside out.

8. The cable branch box with active cooling according to claim 7, characterized in that: The heat pipe is provided with heat exchange fins that extend into the mercury.

9. The cable branch box with active cooling according to claim 8, characterized in that: A vertical rod is vertically connected to the inner wall of the top surface of the outer baffle. The vertical rod has a through hole in the horizontal direction. The rotating shaft passes through the through hole and is rotatably connected to the through hole through a bearing.

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