Electric power engineering power distribution cabinet and overheating early warning method thereof

Abstract

The invention relates to the technical field of power distribution cabinets, in particular to an electric power engineering power distribution cabinet and an overheating early warning method thereof.The electric power engineering power distribution cabinet comprises a cabinet body and a cabinet door, the interior of the cabinet body is divided into an upper cavity and a lower cavity by a partition plate, and a ventilation cavity with the back face being a transparent end is formed in the partition plate; a sealing cover is installed on the back face of the partition plate through a screw rod, the screw rod is installed in a screw cylinder located in the partition plate in a threaded mode, the screw cylinder is in driving connection with a gear, and part of the gear extends out of the partition plate. The beneficial effects of the invention are that through the arrangement of the separator plate and the exhaust fan, when the cooler cannot discharge most heat due to overheating in the cabinet body, the exhaust fan can be started to perform auxiliary heat dissipation on the cabinet body, so that energy can be saved at ordinary times, dust can be prevented from entering the cabinet body, auxiliary heat dissipation can be performed in time in case of overheating, and the service life of the cabinet body is prolonged. Therefore, normal operation of components in the cabinet body is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution cabinets, and in particular to a power engineering power distribution cabinet and an overheating early warning method thereof. Background Art

[0002] The distribution cabinet is divided into power distribution cabinet, lighting distribution cabinet and metering cabinet. It is the final equipment of the distribution system. The distribution cabinet is a general term for the motor control center. The distribution cabinet is used in occasions with dispersed loads and fewer circuits. The motor control center is used in occasions with concentrated loads and more circuits. They distribute the electric energy of a circuit of the upper-level distribution equipment to the nearest load. This level of equipment should provide protection, monitoring and control for the load. Since various electronic devices are installed in the distribution cabinet, a large amount of heat is often generated during operation.

[0003] In order to prevent dust pollution, existing distribution cabinets often use water cooling to cool the cabinet body. When the temperature is too high, the distribution cabinet often overheats due to untimely heat dissipation. If it is in an overheated state for a long time, it is easy to cause damage to internal electronic components.

[0004] Therefore, a power engineering distribution cabinet and an overheating early warning method thereof are needed to solve the above problems. Summary of the invention

[0005] In order to solve the above problem, that is, to solve the problem that the existing power distribution cabinet often fails to dissipate heat in time when the temperature is too high, the present invention provides a power engineering power distribution cabinet and an overheating warning method thereof.

[0006] A power distribution cabinet for electric power engineering, comprising a cabinet body and a cabinet door, wherein the interior of the cabinet body is divided into an upper cavity and a lower cavity by a partition, a ventilation cavity with a transparent back end is provided inside the partition, a cover is installed on the back of the partition through a screw, the screw thread is installed in a screw barrel located in the partition, the screw barrel is connected to a gear drive, and part of the gear extends to the outside of the partition; the upper surface and the lower surface of the ventilation cavity are respectively provided with air inlet holes connected to the upper cavity and the lower cavity, a double-axis motor is fixedly installed inside the ventilation cavity, one of the shafts of the double-axis motor extends to the front of the partition and is coaxially provided with a cone Tooth grooves; exhaust fans are arranged through the positions near the top and the bottom of the cabinet door, and a matching bevel gear is rotatably installed near the middle of the cabinet door, and the two exhaust fans are drivingly connected to the matching bevel gears, and the matching bevel gears are connected to the bevel tooth grooves; an upper sealing plate is installed at a position near the top of the cabinet door through an electric telescopic rod, and a lower sealing plate is installed below the upper sealing plate through a tooth plate, and the tooth plate is meshingly linked to the gear; a cooler is arranged on the cabinet body, and a temperature sensor is arranged on the cooler, and the temperature sensor is electrically connected to the dual-axis motor and the electric telescopic rod respectively through a main controller.

[0007] In the above-mentioned power engineering distribution cabinet, a second bevel gear is coaxially fixedly installed on one end of the screw barrel away from the screw rod, and a first bevel gear is coaxially fixedly installed on one side of the gear through a connecting rod, and the first bevel gear is meshingly connected with the second bevel gear.

[0008] In the above-mentioned power engineering distribution cabinet, an upper air outlet and a lower air outlet are respectively provided near the top and near the bottom of the cabinet door, the upper air outlet and the lower air outlet are respectively communicated with the upper cavity and the lower cavity, and the two exhaust fans are rotatably installed in the upper air outlet and the lower air outlet respectively; an intermediate shaft is rotatably installed near the middle of the cabinet door, the matching bevel gear is coaxially fixedly installed on one end of the intermediate shaft, and the intermediate shaft is drivingly connected to the two exhaust fans through a second connecting belt.

[0009] The above-mentioned power engineering distribution cabinet, the interior of the cabinet door is respectively provided with an upper sealing plate cavity and a lower sealing plate cavity near the top and near the bottom, the upper sealing plate cavity and the lower sealing plate cavity are respectively connected to the upper air outlet and the lower air outlet, the upper sealing plate cavity and the lower sealing plate cavity are connected through a connecting cavity, and one side of the connecting cavity is connected to the outside through a socket; the electric telescopic rod is installed above the upper sealing plate cavity, the bottom end of the electric telescopic rod is fixedly connected to the upper surface of the upper sealing plate, and the upper sealing plate and the lower sealing plate are respectively slidably installed in the upper sealing plate cavity and the lower sealing plate cavity, the height of the upper sealing plate is greater than the height of the upper air outlet and less than the height of the upper sealing plate cavity, the height of the lower sealing plate is greater than the height of the lower air outlet and less than the height of the lower sealing plate cavity, the tooth plate is arranged through the connecting cavity, and the gear is meshed and connected with the tooth plate through the socket.

[0010] In the above-mentioned power engineering distribution cabinet, a dustproof net is arranged inside the air inlet hole, and two or more support plates are fixedly installed inside the ventilation cavity, each of the support plates is rotatably mounted with a brush rod, and the outer surface of each brush rod is provided with bristles, and two or more of the brush rods are connected by a first connecting belt transmission, and one end of one of the brush rods is coaxially fixedly connected to the other shaft of the dual-axis motor.

[0011] In the above-mentioned power engineering distribution cabinet, the cooler is fixedly installed on the top of the cabinet, and a main cooling box and a pre-cooling box are arranged inside the cooler. The first liquid inlet of the main cooling box is fluidly connected with the liquid outlet of the pre-cooling box, and the liquid outlet of the main cooling box is fluidly connected with the liquid inlet of the cooling pipe. The cooling pipe is arranged inside the cabinet, and the temperature sensor is arranged on the cooling pipe near the liquid outlet. The liquid outlet of the cooling pipe is fluidly connected with the second liquid inlet of the main cooling box and the liquid inlet of the pre-cooling box respectively. The second liquid inlet of the main cooling box is provided with a first solenoid valve, and the liquid inlet of the pre-cooling box is provided with a second solenoid valve; the first solenoid valve and the second solenoid valve are both electrically connected to the temperature sensor through a main controller.

[0012] In the above-mentioned power engineering distribution cabinet, the cabinet door is hinged on the front side of the cabinet by installing hinges; the partition is slidably installed inside the cabinet by a frame plate fixedly installed on the side; and the temperature sensor is also electrically connected to the alarm through the main controller.

[0013] An overheating early warning method for a power distribution cabinet in an electric power engineering project comprises the following steps: Step A: Normal heat dissipation: In normal state, the liquid in the cooler dissipates heat to the components in the cabinet through the cooling pipe; Step B: Over-temperature warning: When the temperature of the cooling pipe outlet is too high, the temperature sensor transmits the signal to the alarm for the first time through the main controller, and the alarm does not sound at this time; Step C: Auxiliary heat dissipation: The temperature sensor transmits a signal to the main controller, which controls the first solenoid valve to close and the second solenoid valve to open, so that the liquid first enters the pre-cooling box for pre-cooling and then enters the main cooling box to ensure the coldness of the liquid; then the main controller controls the electric telescopic rod to descend to form an inlet and outlet air passage for the cabinet, and controls the operation of the dual-axis motor to perform auxiliary heat dissipation inside the cabinet; Step D: Alarm / cancel alarm: After a certain period of time, if the temperature inside the cabinet drops to a certain level, the alarm is canceled. If the temperature drop inside the cabinet is small or no temperature drop occurs, the alarm will sound.

[0014] The beneficial effects of the present invention are: 1. The present invention provides a partition and an exhaust fan. When the cabinet is overheated and the cooler cannot discharge most of the heat, the exhaust fan will be started to assist in cooling the cabinet. This can not only save energy but also prevent dust from entering the cabinet. When overheated, the cabinet can also be assisted in cooling the cabinet in time, thereby ensuring the normal operation of the components in the cabinet.

[0015] 2. The present invention, by providing an upper sealing plate and a lower sealing plate, can make the cabinet in a closed state when auxiliary heat dissipation is not needed, so as to prevent dust from entering; by providing a tooth plate and an electric telescopic rod connected to a temperature sensor, when auxiliary heat dissipation is needed, the cabinet can be automatically connected to the outside to form an inlet and outlet duct for heat dissipation by moving the tooth plate downward, and the whole process is automated, so that heat dissipation can be carried out in time.

[0016] 3. The present invention, by providing a brush rod connected to a dual-axis motor and providing bristles on the outer surface of the brush rod, enables the dual-axis motor to simultaneously drive the brush rod to rotate during auxiliary heat dissipation, so that the bristles clean the inner surface of the ventilation cavity, and can sweep away dust on the surface of the air inlet to prevent dust from clogging the air inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the partition of the present invention; Figure 3 This is a schematic diagram of the back structure of the cabinet of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the cabinet door of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the cabinet door of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the cabinet door of the present invention; Figure 7 It is a schematic diagram of the structure of the upper sealing plate and the lower sealing plate of the present invention; Figure 8 It is a schematic diagram of the internal structure of the cooler of the present invention.

[0018] In the figure: 1. Cabinet; 2. Cabinet door; 3. Partition; 4. Upper cavity; 5. Lower cavity; 6. Ventilation cavity; 7. Screw; 8. Cover; 9. Screw barrel; 10. Gear; 11. Air inlet; 12. Double-axis motor; 13. Bevel gear groove; 14. Exhaust fan; 15. Matching bevel gear; 16. Electric telescopic rod; 17. Upper sealing plate; 18. Tooth plate; 19. Lower sealing plate; 20. Cooler; 21. Temperature sensor; 22. Second bevel gear; 23. Connector Connecting rod; 24, first bevel gear; 25, upper air outlet; 26, lower air outlet; 27, intermediate shaft; 28, second connecting belt; 29, upper sealing plate cavity; 30, lower sealing plate cavity; 31, connecting cavity; 32, plug hole; 33, support plate; 34, brush rod; 35, first connecting belt; 36, main cooling box; 37, pre-cooling box; 38, cooling pipe; 39, first solenoid valve; 40, second solenoid valve; 41, installation hinge; 42, frame plate. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0020] like Figure 1-2 and Figure 4-6As shown, an embodiment of the present invention discloses a power distribution cabinet for electric power engineering, including a cabinet body 1 and a cabinet door 2. The interior of the cabinet body 1 is divided into an upper cavity 4 and a lower cavity 5 by a partition 3. A ventilation cavity 6 with a transparent end on the back is provided inside the partition 3. A cover 8 is installed on the back of the partition 3 through a screw 7. The screw 7 is threadedly installed in a screw barrel 9 located in the partition 3. The screw barrel 9 is driven and connected to a gear 10, and part of the gear 10 extends to the outside of the partition 3; air inlet holes 11 connected to the upper cavity 4 and the lower cavity 5 are respectively provided on the upper surface and the lower surface of the ventilation cavity 6. A dual-axis motor 12 is fixedly installed inside the ventilation cavity 6, and one of the shafts of the dual-axis motor 12 extends to the front of the partition 3 and is coaxially provided with a bevel tooth groove. 13; exhaust fans 14 are provided near the top and bottom of the cabinet door 2, and a matching bevel gear 15 is rotatably installed near the middle of the cabinet door 2. Both exhaust fans 14 are connected to the matching bevel gear 15 for driving, and the matching bevel gear 15 is connected to the bevel tooth groove 13; an upper sealing plate 17 is installed near the top of the cabinet door 2 through an electric telescopic rod 16, and a lower sealing plate 19 is installed below the upper sealing plate 17 through a tooth plate 18, and the tooth plate 18 is meshed with the gear 10; a cooler 20 is provided on the cabinet body 1, and a temperature sensor 21 is provided on the cooler 20, and the temperature sensor 21 is electrically connected to the dual-axis motor 12 and the electric telescopic rod 16 through the main controller; normal state Under the present invention, the cooler 20 cools the inside of the cabinet 1 to prevent external dust from entering the cabinet. When the liquid from the cooler 20 absorbs heat from the cabinet 1, if the temperature is too high, it will be sensed by the temperature sensor 21, and then the temperature sensor 21 transmits the signal to the main controller, and the main controller controls the electric telescopic rod 16 and the dual-axis motor 12. The electric telescopic rod 16 will push the upper sealing plate 17, the tooth plate 18 and the lower sealing plate 19 to descend, so that the upper cavity 4 and the lower cavity 5 are connected to the outside. When the tooth plate 18 descends, it will drive the screw barrel 9 to rotate through the gear 10. The screw barrel drives the screw 7 to move outward through the threaded movement with the screw 7, and then drives the cover 8 to move backward, so that the ventilation cavity 6 is connected to the outside, and then The dual-axis motor 12 drives the two exhaust fans 14 to rotate through the matching bevel gear 15, so as to discharge the hot air in the cabinet 1 and dissipate the heat to the internal engineering components of the upper cavity 4 and the lower cavity 5. When the temperature sensor 21 detects that the temperature of the liquid after the cooler 20 absorbs heat drops to a certain level, the above components return to their original positions and stop auxiliary heat dissipation; by setting the partition 3 and the exhaust fan 14, when the cabinet 1 is overheated and the cooler 20 cannot discharge most of the heat, the exhaust fan 14 will be started to assist in the heat dissipation of the cabinet 1. It can not only save energy but also prevent dust from entering the cabinet 1 in normal times. When it is overheated, it can also timely assist in the heat dissipation of the cabinet 1, thereby ensuring the normal operation of the components in the cabinet 1.

[0021] like Figure 2As shown, a second bevel gear 22 is coaxially fixedly installed on one end of the screw barrel 9 away from the screw rod 7, and a first bevel gear 24 is coaxially fixedly installed on one side of the gear 10 through a connecting rod 23, and the first bevel gear 24 is meshingly connected with the second bevel gear 22; the gear 10 drives the first bevel gear 24 to rotate through the connecting rod 23, and the first bevel gear 24 drives the screw barrel 9 to rotate by meshing with the second bevel gear 22.

[0022] like Figure 4 As shown, an upper air outlet 25 and a lower air outlet 26 are respectively provided near the top and near the bottom of the cabinet door 2, and the upper air outlet 25 and the lower air outlet 26 are respectively connected to the upper cavity 4 and the lower cavity 5, and the two exhaust fans 14 are respectively rotatably installed in the upper air outlet 25 and the lower air outlet 26; an intermediate shaft 27 is rotatably installed near the middle of the cabinet door 2, and the matching bevel gear 15 is coaxially fixedly installed on one end of the intermediate shaft 27, and the intermediate shaft 27 is drivingly connected to the two exhaust fans 14 through a second connecting belt 28; when the dual-axis motor 12 drives the matching bevel gear 15 to rotate, the intermediate shaft 27 will drive the two exhaust fans 14 to rotate through the second connecting belt 28, and the upper cavity 4 and the lower cavity 5 are respectively connected to the outside through the upper air outlet 25 and the lower air outlet 26, so that the heat in the upper cavity 4 and the lower cavity 5 can be drawn to the outside by the exhaust fan 14 through the upper air outlet 25 and the lower air outlet 26, so as to achieve the effect of heat dissipation.

[0023] like Figure 5-6As shown, an upper sealing plate cavity 29 and a lower sealing plate cavity 30 are respectively provided near the top and the bottom of the cabinet door 2, and the upper sealing plate cavity 29 and the lower sealing plate cavity 30 are respectively connected to the upper air outlet 25 and the lower air outlet 26, and the upper sealing plate cavity 29 and the lower sealing plate cavity 30 are connected through a connecting cavity 31, and one side of the connecting cavity 31 is connected to the outside through a socket 32; the electric telescopic rod 16 is installed above the upper sealing plate cavity 29, and the bottom end of the electric telescopic rod 16 is fixedly connected to the upper surface of the upper sealing plate 17, and the upper sealing plate 17 and the lower sealing plate 19 are respectively slidably installed in the upper sealing plate cavity 29 and the lower sealing plate cavity 30, the height of the upper sealing plate 17 is greater than the height of the upper air outlet 25 and less than the height of the upper sealing plate cavity 29, the height of the lower sealing plate 19 is greater than the height of the lower air outlet 26 and less than the height of the lower sealing plate cavity 30, the tooth plate 18 is arranged through the connecting cavity 31, and the gear 10 passes through the socket 32 ​​and The tooth plate 18 is meshed and connected; after the temperature sensor 21 transmits the overheating signal to the electric telescopic rod 16, the electric telescopic rod 16 drives the upper sealing plate 17, the tooth plate 18 and the lower sealing plate 19 to descend, so that the upper cavity 4 and the lower cavity 5 are connected to the outside through the upper air outlet 25 and the lower air outlet 26 respectively for heat dissipation. When the tooth plate 18 descends, the gear 10 is driven to rotate by meshing with the gear 10, thereby controlling the cover 8; by providing the upper sealing plate 17 and the lower sealing plate 19, when auxiliary heat dissipation is not required, the cabinet 1 can be in a closed state to prevent dust from entering; by providing the tooth plate 18 and the electric telescopic rod 16 connected to the temperature sensor 21, when auxiliary heat dissipation is required, the cabinet 1 can be automatically connected to the outside to form an inlet and outlet duct for heat dissipation by moving the tooth plate 18 downward, and the whole process is automated, and heat dissipation can be performed in time.

[0024] like Figure 2 As shown, a dustproof net is provided inside the air inlet 11, and two or more support plates 33 are fixedly installed inside the ventilation cavity 6, and a brush rod 34 is rotatably installed on each support plate 33, and the outer surface of each brush rod 34 is provided with bristles, and two or more brush rods 34 are connected by a first connecting belt 35, and one end of one brush rod 34 is coaxially fixedly connected to the other axis of the dual-axis motor 12; by providing a brush rod 34 connected to the dual-axis motor 12, and providing bristles on the outer surface of the brush rod 34, when auxiliary heat dissipation is performed, the dual-axis motor 12 can simultaneously drive the brush rod 14 to rotate, so that the bristles clean the inner surface of the ventilation cavity 6, and the dust on the surface of the air inlet 11 can be swept away to prevent the dust from clogging the air inlet 11.

[0025] like Figure 8As shown, the cooler 20 is fixedly installed on the top of the cabinet 1, and a main cooling box 36 and a pre-cooling box 37 are arranged inside the cooler 20. The first liquid inlet of the main cooling box 37 is fluidly connected with the liquid outlet of the pre-cooling box 37, and the liquid outlet of the main cooling box 36 is fluidly connected with the liquid inlet of the cooling pipe 38. The cooling pipe 38 is arranged inside the cabinet 1, and the temperature sensor 21 is arranged on the cooling pipe 38 near the liquid outlet. The liquid outlet of the cooling pipe 38 is fluidly connected with the second liquid inlet of the main cooling box 36 and the liquid inlet of the pre-cooling box 37, respectively. The second liquid inlet of the main cooling box 36 is provided with a first The solenoid valve 39 and the liquid inlet of the pre-cooling box 37 are provided with a second solenoid valve 40; the first solenoid valve 39 and the second solenoid valve 40 are both electrically connected to the temperature sensor 21 through the main controller; under normal conditions, the first solenoid valve 39 is opened and the second solenoid valve 40 is closed. When the temperature sensor 21 detects that the fluid in the cooling pipe 38 is overheated, the first solenoid valve 39 is closed and the second solenoid valve 40 is opened, so that the liquid after absorbing heat first enters the pre-cooling box 37 for pre-cooling and then enters the main cooling box 36, which can ensure that the circulating liquid is always in a low temperature state before entering the cabinet 1, thereby effectively cooling the cabinet 1.

[0026] like Figure 1-2 As shown, the cabinet door 2 is hinged to the front of the cabinet body 1 by installing a hinge 41; the partition 3 is slidably installed inside the cabinet body 1 through a frame plate 42 fixedly installed on the side; the temperature sensor 21 is also electrically connected to the alarm through the main controller; after running for a period of time, the staff can pull out the partition 3 to clean the dust inside the ventilation cavity 6.

[0027] It should be noted that the controller, temperature sensor, alarm, cooler, first solenoid valve and second solenoid valve are resistor components in the prior art. Technical personnel in this field can select electronic components of corresponding models as needed. Controlling the above components to work through the controller belongs to the prior art, and their working principles will not be described in detail here.

[0028] This embodiment also provides the above-mentioned overheating early warning method of the power distribution cabinet of the power engineering, which comprises the following steps: Step A: Normal heat dissipation: In normal state, the liquid in the cooler 20 passes through the cooling pipe 38 to dissipate heat to the components in the cabinet 1; Step B: Over-temperature warning: When the temperature of the liquid outlet of the cooling pipe 38 is too high, the temperature sensor 21 transmits the signal to the alarm for the first time through the main controller, and the alarm does not sound an alarm at this time; Step C: auxiliary heat dissipation: the temperature sensor 21 transmits a signal to the main controller, which controls the first solenoid valve 39 to close and the second solenoid valve 40 to open, so that the liquid first enters the pre-cooling box 37 for pre-cooling and then enters the main cooling box 36 to ensure the coldness of the liquid; then the main controller controls the electric telescopic rod 16 to descend so that the cabinet 1 forms an inlet and outlet air passage, and controls the dual-axis motor 12 to run, so as to perform auxiliary heat dissipation inside the cabinet 1; Step D: Alarm / cancel alarm: After a certain period of time, if the temperature in the cabinet 1 drops to a certain level, the alarm is canceled. If the temperature in the cabinet 1 drops slightly or does not drop, the alarm sounds.

[0029] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0032] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A power engineering distribution cabinet, comprising a cabinet body (1) and a cabinet door (2), characterized in that: The interior of the cabinet (1) is divided into an upper cavity (4) and a lower cavity (5) by a partition (3); a ventilation cavity (6) with a transparent back side is provided inside the partition (3); a cover (8) is installed on the back side of the partition (3) via a screw (7); the screw (7) is threadedly installed in a screw barrel (9) located in the partition (3); the screw barrel (9) is drivingly connected to a gear (10), and a portion of the gear (10) extends out of the partition (3); The upper surface and the lower surface of the ventilation cavity (6) are respectively provided with air inlet holes (11) which are in communication with the upper cavity (4) and the lower cavity (5); a dual-axis motor (12) is fixedly installed inside the ventilation cavity (6); one of the axes of the dual-axis motor (12) extends to the front side of the partition plate (3) and is coaxially provided with a conical tooth groove (13); An exhaust fan (14) is provided through the cabinet door (2) at positions near the top and near the bottom, and a matching bevel gear (15) is rotatably mounted at a position near the middle of the cabinet door (2), and both exhaust fans (14) are drivingly connected to the matching bevel gear (15), and the matching bevel gear (15) is connected to the bevel tooth groove (13); An upper sealing plate (17) is installed at a position near the top of the cabinet door (2) via an electric telescopic rod (16), and a lower sealing plate (19) is installed below the upper sealing plate (17) via a toothed plate (18), wherein the toothed plate (18) is meshed and linked with the gear (10); The cabinet (1) is provided with a cooler (20), and the cooler (20) is provided with a temperature sensor (21), and the temperature sensor (21) is electrically connected to the dual-axis motor (12) and the electric telescopic rod (16) respectively through a main controller.

2. The power engineering distribution cabinet according to claim 1, characterized in that: A second bevel gear (22) is coaxially fixedly mounted on one end of the screw barrel (9) away from the screw rod (7), and a first bevel gear (24) is coaxially fixedly mounted on one side of the gear (10) via a connecting rod (23), the first bevel gear (24) being meshingly connected with the second bevel gear (22).

3. The power engineering distribution cabinet according to claim 1, characterized in that: An upper air outlet (25) and a lower air outlet (26) are respectively provided at positions close to the top and the bottom of the cabinet door (2); the upper air outlet (25) and the lower air outlet (26) are respectively connected to the upper cavity (4) and the lower cavity (5); and the two exhaust fans (14) are rotatably mounted in the upper air outlet (25) and the lower air outlet (26); An intermediate shaft (27) is rotatably mounted near the middle of the cabinet door (2), the matching bevel gear (15) is coaxially fixedly mounted on one end of the intermediate shaft (27), and the intermediate shaft (27) is drivingly connected to the two exhaust fans (14) via a second connecting belt (28).

4. The power engineering distribution cabinet according to claim 3, characterized in that: An upper sealing plate cavity (29) and a lower sealing plate cavity (30) are respectively provided at positions near the top and near the bottom of the cabinet door (2); the upper sealing plate cavity (29) and the lower sealing plate cavity (30) are respectively connected to the upper air outlet hole (25) and the lower air outlet hole (26); the upper sealing plate cavity (29) and the lower sealing plate cavity (30) are connected via a connecting cavity (31); one side of the connecting cavity (31) is connected to the outside via a plug hole (32); The electric telescopic rod (16) is installed above the upper sealing plate cavity (29); the bottom end of the electric telescopic rod (16) is fixedly connected to the upper surface of the upper sealing plate (17); the upper sealing plate (17) and the lower sealing plate (19) are slidably installed in the upper sealing plate cavity (29) and the lower sealing plate cavity (30), respectively; the height of the upper sealing plate (17) is greater than the height of the upper air outlet hole (25) and less than the height of the upper sealing plate cavity (29); the height of the lower sealing plate (19) is greater than the height of the lower air outlet hole (26) and less than the height of the lower sealing plate cavity (30); the tooth plate (18) is arranged to pass through the connecting cavity (31); and the gear (10) passes through the insertion hole (32) and is meshedly connected with the tooth plate (18).

5. The power engineering distribution cabinet according to claim 1, characterized in that: A dustproof net is arranged inside the air inlet (11), and two or more support plates (33) are fixedly installed inside the ventilation cavity (6), and a brush rod (34) is rotatably mounted on each of the support plates (33), and bristles are arranged on the outer surface of each of the brush rods (34). Two or more of the brush rods (34) are connected in transmission via a first connecting belt (35), and one end of one of the brush rods (34) is coaxially fixedly connected to the other shaft of the dual-shaft motor (12).

6. The power engineering distribution cabinet according to claim 1, characterized in that: The cooler (20) is fixedly mounted on the top of the cabinet (1); a main cooling box (36) and a pre-cooling box (37) are arranged inside the cooler (20); a first liquid inlet of the main cooling box (37) is fluidically connected to a liquid outlet of the pre-cooling box (37); a liquid outlet of the main cooling box (36) is fluidically connected to a liquid inlet of a cooling pipe (38); the cooling pipe (38) is arranged to penetrate the interior of the cabinet (1); and the temperature sensor (21) is arranged inside the cooler. The cooling tube (38) is located near the liquid outlet, the liquid outlet of the cooling tube (38) is fluidly connected to the second liquid inlet of the main cooling box (36) and the liquid inlet of the pre-cooling box (37), the second liquid inlet of the main cooling box (36) is provided with a first solenoid valve (39), and the liquid inlet of the pre-cooling box (37) is provided with a second solenoid valve (40); the first solenoid valve (39) and the second solenoid valve (40) are both electrically connected to the temperature sensor (21) through a main controller.

7. The power engineering distribution cabinet according to claim 1, characterized in that: The cabinet door (2) is hinged to the front of the cabinet body (1) by installing hinges (41); the partition (3) is slidably installed inside the cabinet body (1) via a frame plate (42) fixedly installed on the side; and the temperature sensor (21) is also electrically connected to the alarm through the main controller.

8. An overheating early warning method for a power engineering distribution cabinet, applied to a power engineering distribution cabinet as claimed in any one of claims 1 to 7, characterized in that: The steps include: Step A: normal heat dissipation: in a normal state, the liquid in the cooler (20) passes through the cooling pipe (38) to dissipate heat from the components in the cabinet (1); Step B: Over-temperature warning: When the temperature of the liquid outlet of the cooling pipe (38) is too high, the temperature sensor (21) transmits a signal to the alarm for the first time through the main controller, and the alarm does not sound an alarm at this time; Step C: auxiliary heat dissipation: the temperature sensor (21) transmits a signal to the main controller, and the main controller controls the first solenoid valve (39) to close and controls the second solenoid valve (40) to open, so that the liquid first enters the pre-cooling box (37) for pre-cooling and then enters the main cooling box (36), thereby ensuring the coldness of the liquid; then the main controller controls the electric telescopic rod (16) to descend so that the cabinet (1) forms an inlet and outlet air passage, and controls the dual-axis motor (12) to operate, thereby performing auxiliary heat dissipation on the inside of the cabinet (1); Step D: Alarm / cancel alarm: After a certain period of time, if the temperature in the cabinet (1) drops to a certain level, the alarm is canceled; if the temperature in the cabinet (1) drops to a small level or no temperature drop occurs, the alarm goes off.

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