Draw-out type low-voltage switch cabinet

Abstract

The invention relates to the technical field of air conditioning, in particular to a draw-out type low-voltage switch cabinet which comprises a cabinet body, a plurality of drawers are arranged in the cabinet body, each drawer is provided with an electric power function unit, a pressure relief device is arranged in the cabinet body, and the pressure relief device comprises a temperature sensor, a lifting control assembly and a cover plate. The temperature sensor is arranged in the cabinet body, the temperature sensor is used for monitoring the temperature in the cabinet body, the cover plate is arranged at the top of the cabinet body, the cover plate is connected with a lifting control assembly arranged in the cabinet body, and a controller is connected between the lifting control assembly and the temperature sensor. And the lifting control assembly opens the cover plate until the temperature in the cabinet body is lower than a second threshold value, and then the lifting control assembly drops the cover plate, so that the temperature and the pressure in the draw-out type low-voltage switch cabinet can be reduced in time, and the situation that a worker needs to re-install the draw-out type low-voltage switch cabinet after pressure relief is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning, in particular to a withdrawable low-voltage switch cabinet. Background Art

[0002] Low-voltage switchgear refers to an electrical device used in low-voltage power systems to control, protect and distribute low-voltage current. It is suitable for power systems with a rated voltage below 1000V and is commonly used in industries, commerce, civil buildings, etc. There are many types of low-voltage switchgear, one of which is a withdrawable low-voltage switchgear. The withdrawable low-voltage switchgear has multiple drawers with the same functional units, and the drawers have good interchangeability.

[0003] The withdrawable low-voltage switchgear will be equipped with a pressure relief device. The existing pressure relief device usually has a cover on the top of the switchgear, which is fixed by nylon screws. When the gas temperature and pressure in the switchgear rise, the nylon screws will melt due to the high-temperature gas in the switchgear and open the cover to release the pressure, thereby avoiding the risk of deformation or even explosion of the switchgear.

[0004] However, since the pressure relief device of the above-mentioned withdrawable low-voltage switch cabinet relies on the melting of nylon screws, the reaction temperature is relatively high, and it is difficult to reduce the temperature and pressure in the cabinet in time. In addition, this type of pressure relief method is a one-time pressure relief, and it is necessary to rely on the staff to reinstall the nylon screws afterwards, which is more troublesome. Summary of the invention

[0005] In order to enable a withdrawable low-voltage switch cabinet to promptly lower the temperature and pressure inside the cabinet and avoid the need for staff to reinstall after pressure relief, the present application provides a withdrawable low-voltage switch cabinet.

[0006] The present invention provides a withdrawable low-voltage switch cabinet adopts the following technical solution: A withdrawable low-voltage switch cabinet comprises a cabinet body, wherein a plurality of drawers are arranged in the cabinet body, each of the drawers is provided with an electric function unit, a pressure relief device is arranged in the cabinet body, and the pressure relief device comprises a temperature sensor, a lifting control component and a cover plate, wherein the temperature sensor is arranged in the cabinet body, and the temperature sensor is used to monitor the temperature in the cabinet body, the cover plate is arranged on the top of the cabinet body, the cover plate is connected to the lifting control component arranged in the cabinet body, a controller is connected between the lifting control component and the temperature sensor, the controller is provided with a first threshold value and a second threshold value, the first threshold value is greater than the second threshold value, when the temperature sensor monitors that the temperature value exceeds the first threshold value, the lifting control component opens the cover plate, and the lifting control component drops the cover plate again after the temperature in the cabinet body is lower than the second threshold value.

[0007] Preferably, a plurality of the drawers are arranged in a vertical direction within the cabinet.

[0008] Preferably, the lifting control assembly includes a plurality of electric cylinders, which are fixedly arranged in the cabinet, and the bottom of the cover plate is fixedly connected to the telescopic end of the top of the electric cylinder. The extension of the electric cylinder controls the lifting of the cover plate, and the shortening of the electric cylinder controls the falling back of the cover plate.

[0009] Preferably, a slider module is provided inside the cabinet, the slider module is vertically arranged in the cabinet, the temperature sensor is arranged on a slider of the slider module, the temperature sensor faces the drawer, and the temperature sensor is connected to the slider module through the controller. When the temperature sensor monitors that the temperature inside the cabinet exceeds a first threshold value, the slider module controls the slider to stop.

[0010] Preferably, a distance sensor is further provided in the cabinet, the slider of the slider module is located on the sensing path of the distance sensor, and the distance sensor is used to monitor the stop position of the temperature sensor.

[0011] Preferably, a side wall of the cabinet is provided with a heat dissipation hole, and a heat dissipation grille is arranged outside the heat dissipation hole.

[0012] Preferably, the heat dissipation grille includes a frame and a plurality of grille sheets, the plurality of grille sheets are parallel to each other and arranged in a vertical direction, the tops of the grille sheets are movably hinged in the frame, and the plurality of grille sheets naturally hang down under their own weight and close the heat dissipation holes.

[0013] Preferably, a cooling fan is provided in the cabinet, the cooling fan faces the cooling grille, the cooling fan is connected to the controller, and when the temperature sensor monitors a value exceeding a first threshold, the controller controls the cooling fan to start.

[0014] Preferably, the cooling fan is arranged on the slider of the slider module, and the cooling fan faces away from the drawer.

[0015] Preferably, an alarm light is provided on the top of the cover plate, the alarm light is connected to the controller, and the alarm light lights up synchronously with the raising of the cover plate.

[0016] The beneficial effects of the present invention are: 1. When the temperature sensor detects that the temperature value exceeds the first threshold, the lifting control component opens the cover to allow the high temperature and high pressure in the cabinet to be released, so as to lower the temperature and pressure in the cabinet. After the temperature in the cabinet is lower than the second threshold, the lifting control component drops the cover to ensure that the temperature in the cabinet drops sufficiently before dropping the cover to prevent water or dust from entering the cabinet on a daily basis. By adjusting the parameters of the first threshold and the second threshold, the reaction temperature of the pressure relief device can be prevented from being too high, and the temperature and pressure in the cabinet can be lowered in time. In addition, this type of pressure relief method can be automatically repeated without relying on the staff to reinstall the pressure relief device, which is more convenient. 2. When the temperature sensor detects that the temperature inside the cabinet exceeds the first threshold, the slider module controls the slider to stop. Then, by observing the position where the slider stops, it can be quickly determined which drawer's power function unit has an abnormality; 3. When the value monitored by the temperature sensor exceeds the first threshold and stops moving, in addition to causing the lifting control component to control the cover to open, the controller also controls the cooling fan to start. The cooling fan blows open the grille at the corresponding height position to increase the heat dissipation speed of the abnormally hot drawer at this height position, so as to reduce the temperature and air pressure in the cabinet as soon as possible. When the value monitored by the temperature sensor is lower than the second threshold and moves again, the cooling fan is turned off, and the blowing grille falls naturally again to close the cooling holes to prevent dust and water from entering the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an external structural diagram of a withdrawable low-voltage switchgear in an embodiment of the present application; Figure 2 This is an internal structure diagram of a withdrawable low-voltage switch cabinet in an embodiment of the present application; Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0018] Explanation of the accompanying drawings: 1. Cabinet; 2. Drawer; 21. Power function unit; 3. Temperature sensor; 4. Cover plate; 41. Warning light; 5. Electric cylinder; 6. Slider module; 7. Distance sensor; 8. Heat dissipation grille; 81. Frame; 82. Grille; 9. Cooling fan. DETAILED DESCRIPTION

[0019] The following will be combined Figure 1-Figure 3 The present invention is further illustrated by the following embodiments.

[0020] This embodiment discloses a withdrawable low-voltage switch cabinet.

[0021] Reference Figure 1 and Figure 2The withdrawable low-voltage switch cabinet includes a cabinet 1, and a plurality of drawers 2 are arranged in the cabinet 1 along the vertical direction, and each drawer 2 is provided with a power function unit 21. In this embodiment, the drawer 2 is inserted and pulled out at the front of the cabinet 1. A pressure relief device is arranged in the cabinet 1, and the pressure relief device includes a temperature sensor 3, a lifting control component and a cover plate 4, wherein the temperature sensor 3 is arranged in the cabinet 1, and the temperature sensor 3 is used to monitor the temperature in the cabinet 1. The cover plate 4 is arranged on the top of the cabinet 1, and the cover plate 4 is connected to the lifting control component arranged inside the cabinet 1. A controller is connected between the lifting control component and the temperature sensor 3, and the controller is arranged on the inner wall of the cabinet 1. The controller is provided with a first threshold value and a second threshold value, and the first threshold value is greater than the second threshold value. When the temperature sensor 3 detects that the temperature value exceeds the first threshold value, the lifting control component opens the cover plate 4 to allow the high temperature and high pressure in the cabinet 1 to be discharged, so as to lower the temperature and pressure in the cabinet 1, until the temperature in the cabinet 1 is lower than the second threshold value, and the lifting control component drops the cover plate 4 again, ensuring that the temperature in the cabinet drops sufficiently before dropping the cover plate 4, so as to avoid water or dust from entering the cabinet on a daily basis. Through the above-mentioned setting, on the one hand, by adjusting the parameters of the first threshold value and the second threshold value, it is possible to avoid the reaction temperature of the pressure relief device being too high, and to timely lower the temperature and pressure in the cabinet. On the other hand, this type of pressure relief method can be automatically repeated, without relying on the staff to reinstall the pressure relief device, which is more convenient. In addition, an alarm light 41 is provided on the top of the cover plate 4 , and the alarm light 41 is also connected to the controller. The alarm light 41 lights up synchronously with the raising of the cover plate 4 , thereby more intuitively reminding the staff to pay attention to the temperature and pressure conditions of the cabinet 1 .

[0022] Reference Figure 1 and Figure 2 The lifting control assembly includes a plurality of electric cylinders 5, which are fixedly arranged on the inner side of the top of the cabinet 1, and the bottom of the cover plate 4 is fixedly connected to the telescopic end of the top of the electric cylinder 5. Finally, the electric cylinder 5 extends to control the cover plate 4 to be lifted, and the electric cylinder 5 shortens to control the cover plate 4 to fall back. In other embodiments, the lifting control assembly can also use telescopic parts such as hydraulic cylinders, as long as the lifting and lowering control of the cover plate 4 can be achieved.

[0023] Reference Figure 1 and Figure 2Although the above-mentioned setting can timely monitor the abnormal high temperature inside the cabinet 1 and open the cover 4 in time to release the temperature and pressure, it is still difficult to determine which drawer 2 has an abnormal power function unit 21 that causes the high temperature and high pressure inside the cabinet. One solution is to set a temperature sensor 3 at each drawer 2. When the cabinet has a high temperature and high pressure, by judging which temperature sensor 3 first detects the high temperature, it can be judged which drawer 2 has an abnormal power function unit 21. However, this method requires multiple temperature sensors 3, which not only increases the monitoring cost, but also increases the risk of sensor abnormality and the difficulty of maintenance. In order to solve this problem, in the present invention, a slider module 6 is set inside the cabinet 1. The slider module 6 is vertically set in the cabinet 1 and is located on the right side of the drawer 2, so that the slider of the slider module 6 slides in the vertical direction. The temperature sensor 3 is set on the slider of the slider module 6, the temperature sensor 3 faces the drawer 2, and the slider of the slider module 6 controls the temperature sensor 3 to move up and down. Furthermore, the temperature sensor 3 and the slider module 6 are also connected through the controller signal. When the temperature sensor 3 detects that the temperature in the cabinet exceeds the first threshold, the slider module 6 controls the slider to stop. Then, by observing the position where the slider stops, it can be quickly determined which drawer 2 has an abnormal power function unit 21. In some embodiments, a distance sensor 7 is also provided in the cabinet 1. The slider of the slider module 6 is located on the sensing path of the distance sensor 7. When the slider of the slider module 6 stops, the distance sensor 7 can quickly locate the stop position of the slider of the slider module 6, which is more convenient for the staff to make a judgment.

[0024] Reference Figures 1 to 3The cabinet 1 is provided with a heat dissipation hole on the right side, the height of the heat dissipation hole is not less than the sliding distance of the slider of the slider module 6, and the heat dissipation hole is provided with a heat dissipation grille 8, which includes a frame 81 and a plurality of grille pieces 82, and the plurality of grille pieces 82 are parallel to each other and arranged in the vertical direction. In this embodiment, the top of the grille piece 82 is movably hinged in the frame 81, and the plurality of grille pieces 82 naturally fall down under their own weight and close the heat dissipation hole. At this time, the grille piece 82 can open automatically when the pressure inside the cabinet 1 surges, thereby improving the pressure relief capacity of the cabinet 1 and improving the daily dust and water resistance. Furthermore, a heat dissipation fan 9 is provided on the slider of the slider module 6, and the heat dissipation fan 9 faces away from the drawer 2 and the heat dissipation fan 9 faces the heat dissipation grille 8, and the heat dissipation fan 9 is also connected to the controller. When the value monitored by the temperature sensor 3 exceeds the first threshold and stops moving, the controller not only causes the lifting control assembly to control the cover plate 4 to open, but also controls the cooling fan 9 to start, and the cooling fan 9 blows open the grille sheet 82 at the corresponding height position to increase the heat dissipation speed of the abnormally hot drawer 2 at this height position, so as to adjust the temperature and air pressure in the cabinet 1 as soon as possible. When the value monitored by the temperature sensor 3 is lower than the second threshold and moves again, the cooling fan 9 is turned off, and the blowing grille sheet 82 naturally falls again to close the heat dissipation hole, preventing dust and water from easily entering the cabinet 1.

[0025] The above are all preferred embodiments of the present invention, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A withdrawable low-voltage switch cabinet, characterized in that: The invention comprises a cabinet (1), wherein a plurality of drawers (2) are arranged in the cabinet (1), each of the drawers (2) is provided with an electric function unit (21), wherein a pressure relief device is arranged in the cabinet (1), wherein the pressure relief device comprises a temperature sensor (3), a lifting control component and a cover plate (4), wherein the temperature sensor (3) is arranged in the cabinet (1), and the temperature sensor (3) is used to monitor the temperature in the cabinet (1), wherein the cover plate (4) is arranged at the top of the cabinet (1), wherein the cover plate (4) is connected to the lifting control component arranged in the cabinet (1), wherein a controller is connected between the lifting control component and the temperature sensor (3), wherein the controller is provided with a first threshold value and a second threshold value, wherein the first threshold value is greater than the second threshold value, and when the temperature sensor (3) detects that the temperature value exceeds the first threshold value, the lifting control component opens the cover plate (4), and the lifting control component drops the cover plate (4) until the temperature in the cabinet (1) is lower than the second threshold value.

2. A withdrawable low-voltage switch cabinet according to claim 1, characterized in that: The plurality of drawers (2) are arranged in a vertical direction inside the cabinet (1).

3. The withdrawable low-voltage switch cabinet according to claim 1, characterized in that: The lifting control assembly comprises a plurality of electric cylinders (5), wherein the plurality of electric cylinders (5) are fixedly arranged in the cabinet (1), the bottom of the cover plate (4) is fixedly connected to the telescopic end of the top of the electric cylinder (5), the electric cylinder (5) is extended to control the cover plate (4) to be lifted up, and the electric cylinder (5) is shortened to control the cover plate (4) to be lowered back.

4. A withdrawable low-voltage switch cabinet according to claim 2, characterized in that: A slider module (6) is arranged inside the cabinet (1), the slider module (6) is arranged vertically inside the cabinet (1), the temperature sensor (3) is arranged on a slider of the slider module (6), the temperature sensor (3) faces the drawer (2), the temperature sensor (3) is connected to the slider module (6) through the controller, and when the temperature sensor (3) detects that the temperature inside the cabinet exceeds a first threshold value, the slider module (6) controls the slider to stop.

5. A withdrawable low-voltage switch cabinet according to claim 4, characterized in that: A distance sensor (7) is also arranged in the cabinet (1); the slider of the slider module (6) is located on the sensing path of the distance sensor (7); and the distance sensor (7) is used to monitor the stop position of the temperature sensor (3).

6. A withdrawable low-voltage switch cabinet according to claim 4, characterized in that: The side wall of the cabinet (1) is provided with a heat dissipation hole, and a heat dissipation grille (8) is arranged outside the heat dissipation hole.

7. The withdrawable low-voltage switch cabinet according to claim 6, characterized in that: The heat dissipation grille (8) comprises a frame (81) and a plurality of grille pieces (82); the plurality of grille pieces (82) are parallel to each other and arranged in a vertical direction; the tops of the grille pieces (82) are movably hinged in the frame (81); the plurality of grille pieces (82) naturally hang down under their own weight and close the heat dissipation holes.

8. The withdrawable low-voltage switch cabinet according to claim 7, characterized in that: A cooling fan (9) is arranged in the cabinet (1), the cooling fan (9) faces the cooling grille (8), the cooling fan (9) is connected to the controller, and when the temperature sensor (3) detects that the value exceeds a first threshold, the controller controls the cooling fan (9) to start.

9. The withdrawable low-voltage switch cabinet according to claim 8, characterized in that: The cooling fan (9) is arranged on the slider of the slider module (6), and the cooling fan (9) faces away from the drawer (2).

10. The withdrawable low-voltage switch cabinet according to claim 1, characterized in that: An alarm light (41) is provided on the top of the cover plate (4), the alarm light (41) is connected to the controller, and the alarm light (41) lights up synchronously with the lifting of the cover plate (4).

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