Low-voltage switch cabinet easy to dissipate heat

Abstract

The invention relates to the field of switch cabinets, and particularly discloses an easy-heat-dissipation low-voltage switch cabinet which comprises a cabinet body and a cabinet door hinged to the cabinet body, heat dissipation holes are formed in the side wall of the cabinet body, a dustproof device is arranged on the outer side of the cabinet body, and the dustproof device comprises a connecting frame and a filter screen fixedly connected to the inner side of the connecting frame. The filter screen right faces the heat dissipation holes, an upper brush strip and a lower brush strip are attached to the upper end and the lower end of the filter screen respectively, the upper brush strip and the lower brush strip are arranged on the side, close to the cabinet body, of the filter screen, one end of the upper brush strip and one end of the lower brush strip are connected with cleaning racks, the other end of the upper brush strip and the other end of the lower brush strip are jointly provided with a guide rod in a penetrating mode, and the guide rod is fixedly connected with the connecting frame. And a cleaning gear is engaged between the two cleaning racks, the cleaning gear is rotationally connected with the connecting frame, a driving motor is installed on the side, away from the cabinet body, of the connecting frame, and an output shaft of the driving motor is connected with the cleaning gear. The filter screen can be automatically cleaned so as to improve the heat dissipation efficiency.

Description

Technical Field

[0001] The present application relates to the field of switch cabinets, and in particular to a low-voltage switch cabinet that is easy to dissipate heat. Background Art

[0002] Low-voltage switchgear is an important power equipment, which consists of one or more low-voltage switchgear and related control, measurement, signal, protection, regulation and other equipment. It is widely used in power plants, petroleum, chemical, metallurgy, textile and other industries for power transmission, distribution and power conversion. Low-voltage switchgear will generate heat when working, and reasonable heat dissipation design is the key to ensure its normal operation.

[0003] In the related art, low-voltage switch cabinets are often provided with heat dissipation holes on the side walls of the cabinet to discharge internal heat in a natural heat dissipation manner. In order to reduce dust or flying insects from entering the cabinet through the heat dissipation holes, a filter screen facing the heat dissipation holes is fixedly connected to the inside of the cabinet.

[0004] However, after the low-voltage switch cabinet has been used for a period of time, dust is likely to accumulate on the surface of the filter, affecting the heat dissipation efficiency of natural ventilation, and thus affecting the normal operation of the switch cabinet. The filter is located inside the cabinet and is not easy to clean, which needs to be improved. Summary of the invention

[0005] In order to facilitate the cleaning of the filter to improve the heat dissipation efficiency, the present application provides a low-voltage switch cabinet that is easy to dissipate heat.

[0006] The present application provides a low-voltage switch cabinet with easy heat dissipation, which adopts the following technical solution: A low-voltage switch cabinet that is easy to dissipate heat, comprises a cabinet body and a cabinet door hinged to the cabinet body, the cabinet body side walls are provided with heat dissipation holes, the cabinet body outer side is provided with a dustproof device, the dustproof device comprises a connecting frame and a filter screen fixedly connected to the inner side of the connecting frame, the filter screen is directly opposite to the heat dissipation holes, the upper and lower ends of the filter screen are respectively fitted with an upper brush bar and a lower brush bar, the upper brush bar and the lower brush bar are both arranged on the side of the filter screen close to the cabinet body, one end of the upper brush bar and the lower brush bar are connected to a cleaning rack, and the other end is jointly penetrated by a guide rod, the guide rod is fixedly connected to the connecting frame, a cleaning gear is meshed between the two cleaning racks, the cleaning gear is rotatably connected to the connecting frame, a driving motor is installed on the side of the connecting frame away from the cabinet, and the output shaft of the driving motor is connected to the cleaning gear.

[0007] By adopting the above technical solution, the driving motor is started to drive the cleaning gear to rotate, and then the two cleaning racks are driven to slide towards each other, so that the upper brush bar and the lower brush bar are close to each other, and the dust accumulated on the surface of the filter is brushed off. This application can automatically clean the filter to improve the heat dissipation efficiency. Optionally, guide bars and lifting racks are respectively provided on both sides of the connecting frame, and the guide bars and lifting racks are fixedly connected to the cabinet. The connecting frame is vertically slidably connected to the guide bars, and the lifting rack is meshed with a lifting gear, and the lifting gear is coaxially fixedly connected to the cleaning gear.

[0008] By adopting the above technical solution, starting the drive motor can not only drive the upper brush bar and the lower brush bar to move to clean the filter surface, but also drive the connecting frame and the filter to move upward along the guide bar, so that the heat dissipation holes are fully opened to achieve emergency heat dissipation and ensure the normal operation of the switch cabinet.

[0009] Optionally, a driving device is provided inside the cabinet, and the driving device includes a container filled with carbon disulfide, a piston slidably connected to the container, a proximity switch arranged on one side of the top of the container, and a PLC controller installed on the inner wall of the cabinet. The container is made of transparent material, the proximity switch is electrically connected to the PLC controller, and the PLC controller is electrically connected to the driving motor.

[0010] By adopting the above technical solution, the normal operating temperature range inside the switch cabinet is 20-45°C. When the operating temperature exceeds 45°C due to the lack of timely heat dissipation, carbon disulfide vaporizes, causing the pressure inside the container to increase, and the piston moves upward under pressure. The proximity switch senses the proximity of the piston and feeds back a signal to the PLC controller, which then controls the drive motor to start, causing its output shaft to rotate the required number of times.

[0011] Optionally, the container includes a tank body, a tank neck and a baffle cover connected in sequence from bottom to top, the carbon disulfide is contained inside the tank body, the piston is slidably connected to the tank neck, and a baffle ring for blocking the piston is fixedly connected to the inner wall of the lower end of the tank neck.

[0012] By adopting the above technical solution, the container has good sealing performance, and carbon disulfide cannot escape from the container after vaporization.

[0013] Optionally, the blocking cover is threadedly connected to the tank neck, and the blocking cover is provided with a through hole.

[0014] By adopting the above technical solution, the blocking cover can be unscrewed to facilitate replacement of the piston and ensure sealing.

[0015] Optionally, when the upper brush strip and the lower brush strip are in contact, the filter screen is misaligned with the heat dissipation hole.

[0016] By adopting the above technical solution, the emergency heat dissipation effect is good.

[0017] Optionally, an upper slide bar is connected between the upper brush bar and the cleaning rack, a lower slide bar is connected between the lower brush bar and the cleaning rack, the inner wall of the connecting frame is provided with a slide groove for the upper slide bar and the lower slide bar to slide, the upper slide bar is longer than the lower slide bar, and the upper slide bar is provided with a clearance hole for the corresponding cleaning rack to pass through.

[0018] By adopting the above technical solution, the upper brush bar and the lower brush bar can move toward each other to a fitting state, thereby ensuring the cleaning effect.

[0019] Optionally, a rotating shaft is fixedly connected in the middle of the lifting gear and the cleaning gear, and the rotating shaft is rotatably connected between two inner walls of the slide slot. A through hole for the lifting gear to extend out is provided on one side of the connecting frame close to the lifting rack.

[0020] Optionally, the side wall of the connection frame is provided with a guide groove for inserting the guide bar.

[0021] In summary, this application has the following beneficial effects: When the operating temperature exceeds 45°C, carbon disulfide vaporizes, increasing the pressure inside the container. The piston moves upward under pressure, and the proximity switch senses the proximity of the piston and feeds back a signal to the PLC controller. The PLC controller then controls the drive motor to start, driving the upper and lower brush bars to move to clean the filter surface, and drives the connecting frame and the filter to move upward along the guide bar, so that the heat dissipation holes are fully opened to achieve emergency heat dissipation and ensure the normal operation of the switch cabinet.

[0022] When the working temperature drops to the normal range, the carbon disulfide re-condenses, the piston resets, and the PLC controller controls the drive motor to rotate in the opposite direction, so that the filter is reset after cleaning and continues to prevent dust and flying insects from entering the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a low-voltage switch cabinet with easy heat dissipation according to an embodiment of the present application; Figure 2 It is a partial structural schematic diagram of a cabinet side panel of an embodiment of the present application; Figure 3 is a front view schematic diagram of a dustproof device according to an embodiment of the present application; Figure 4 is a schematic structural diagram of a dustproof device according to an embodiment of the present application; Figure 5 is a cross-sectional schematic diagram of a dustproof device according to an embodiment of the present application; Figure 6 is a schematic structural diagram of a driving device according to an embodiment of the present application; Figure 7 It is a schematic cross-sectional view of a container according to an embodiment of the present application.

[0024] Explanation of the reference numerals: 1. cabinet body; 11. heat dissipation hole; 2. cabinet door; 3. dustproof device; 31. connecting frame; 311. slide groove; 312. perforation; 313. guide groove; 32. filter screen; 33. upper brush bar; 331. upper slide bar; 3311. clearance hole; 34. lower brush bar; 341. lower slide bar; 35. cleaning rack; 36. cleaning gear; 361. rotating shaft; 37. driving motor; 38. lifting gear; 39. guide rod; 4. guide bar; 5. lifting rack; 6. driving device; 61. container; 611. tank body; 612. tank neck; 613. cover; 6131. ​​through hole; 614. retaining ring; 62. piston; 63. proximity switch; 64. PLC controller. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-7 This application is described in further detail.

[0026] The embodiment of the present application discloses a low-voltage switch cabinet that is easy to dissipate heat.

[0027] Reference Figure 1 , Figure 2 The invention discloses a low-voltage switch cabinet that is easy to dissipate heat, comprising a cabinet body 1 and a cabinet door 2 hinged to the cabinet body 1. A heat dissipation hole 11 is arranged through the side wall of the cabinet body 1. The heat dissipation hole 11 is strip-shaped and a plurality of heat dissipation holes 11 are arranged at vertical intervals. The air inside and outside the cabinet body 1 can flow through the heat dissipation holes 11 to help the electrical equipment inside the cabinet body 1 to dissipate heat naturally.

[0028] Reference Figure 2 , Figure 3 A dustproof device 3 is provided on the outside of the cabinet 1 to prevent dust from entering the cabinet 1 and ensure the normal operation of the electrical equipment. The dustproof device 3 includes a connecting frame 31, which is square in shape. A filter screen 32 is fixedly connected to the inner wall of the connecting frame 31 facing away from the cabinet 1, and the filter screen 32 is directly opposite to the heat dissipation hole 11.

[0029] Reference Figure 3 , Figure 4 , dust is blocked by the filter 32 and cannot enter, but dust accumulates on the surface of the filter 32 for a long time, which will affect the air circulation. For this reason, the upper and lower ends of the filter 32 are respectively attached with an upper brush bar 33 and a lower brush bar 34, and the upper brush bar 33 and the lower brush bar 34 are both arranged on the side of the filter 32 close to the cabinet 1. By sliding the upper and lower brush bars 33 and the lower brush bars 34 up and down, the dust on the surface of the filter 32 can be brushed off to the outside ground, and the air circulation is restored.

[0030] Reference Figure 3 , Figure 5In order to realize automatic cleaning, an upper slide bar 331 is fixedly connected to one end of the upper brush bar 33, and a lower slide bar 341 is fixedly connected to one end of the lower brush bar 34. The upper slide bar 331 and the lower slide bar 341 are located on the same side, and a slide groove 311 for the upper slide bar 331 and the lower slide bar 341 to slide is provided on the inner wall of the connection frame 31. Cleaning racks 35 are fixedly connected to the opposite sides of the ends of the upper slide bar 331 and the lower slide bar 341, and a cleaning gear 36 is meshed between the two cleaning racks 35. The upper slide bar 331 is longer than the lower slide bar 341, and a clearance hole 3311 is provided through the upper slide bar 331 for the cleaning rack 35 located on the lower side to pass through. By rotating the cleaning gear 36, the two cleaning racks 35 can be driven to move toward or away from each other, thereby driving the upper brush bar 33 and the lower brush bar 34 to move toward or away from each other. A guide rod 39 is provided through the ends of the upper brush bar 33 and the lower brush bar 34 away from the cleaning rack 35 and slides together in the vertical direction. The guide rod 39 is fixedly connected to the connecting frame 31 to provide guidance for the movement of the upper brush bar 33 and the lower brush bar 34.

[0031] A rotating shaft 361 is fixedly provided in the middle of the cleaning gear 36, and the rotating shaft 361 is rotatably connected between the two inner walls of the slide groove 311. A driving motor 37 is fixedly installed on the outside of the connection frame 31, and the driving motor 37 is a servo motor. The output shaft of the driving motor 37 is fixedly connected to the rotating shaft 361. When the driving motor 37 is started, the cleaning gear 36 can be driven to rotate, and then the upper brush bar 33 and the lower brush bar 34 can be driven to move toward each other to achieve automatic cleaning. The vertical width of the upper slide bar 331 is smaller than that of the upper brush bar 33, and the vertical width of the lower slide bar 341 is smaller than that of the lower brush bar 34, so the upper brush bar 33 and the lower brush bar 34 can move toward each other until they are completely fitted, thereby ensuring the cleaning effect.

[0032] Reference Figure 4 , Figure 5 , guide bars 4 and lifting racks 5 are respectively provided on both sides of the connection frame 31, and the guide bars 4 and the lifting racks 5 are both provided vertically and fixedly connected to the cabinet 1. The connection frame 31 is slidably connected to the guide bars 4 vertically, and a guide groove 313 for inserting the guide bars 4 is provided on the side wall of the connection frame 31. The lifting rack 5 is meshed with a lifting gear 38, and the lifting gear 38 is fixedly connected to the rotating shaft 361, so that the lifting gear 38 is coaxially fixedly connected to the cleaning gear 36, and the cleaning gear 36 can drive the lifting gear 38 to rotate together. The diameter of the lifting gear 38 is larger than the cleaning gear 36, and a through hole 312 for the lifting gear 38 to extend is provided on the side of the connection frame 31 close to the lifting rack 5, and the through hole 312 is connected to the slide groove 311.

[0033] Starting the drive motor 37 not only drives the upper brush bar 33 and the lower brush bar 34 to move to clean the surface of the filter 32, but also drives the connection frame 31 and the filter 32 to move upward along the guide bar 4, so that the heat dissipation hole 11 is fully opened to achieve emergency heat dissipation and ensure the normal operation of the switch cabinet. When the upper brush bar 33 and the lower brush bar 34 are attached, the filter 32 and the heat dissipation hole 11 are completely misaligned.

[0034] Reference Figure 1 , Figure 6 A driving device 6 for starting the action of the dust prevention device 3 is arranged inside the cabinet 1, and the driving device 6 comprises a container 61 filled with carbon disulfide, a piston 62 slidably connected to the container 61, a proximity switch 63 arranged on one side of the top of the container 61, and a PLC controller 64 fixedly mounted on the inner wall of the cabinet 1. The bottom of the container 61 is fixedly connected to the cabinet 1 through a bracket, and the proximity switch 63 is fixedly mounted on the inner wall of the cabinet 1. The proximity switch 63 is electrically connected to the PLC controller 64, and the PLC controller 64 is electrically connected to the driving motor 37. The container 61 is made of transparent material so that the proximity switch 63 can sense the approach of the piston 62.

[0035] Carbon disulfide is a colorless liquid at room temperature with a boiling point of 46.2°C, while the normal operating temperature range inside the switch cabinet is 20-45°C. Therefore, when the operating temperature exceeds 45°C and reaches 46.2°C, carbon disulfide is easily vaporized, causing the pressure inside the container 61 to increase, and the piston 62 moves upward under pressure. After the proximity switch 63 senses the proximity of the piston 62, it feeds back a signal to the PLC controller 64, and the PLC controller 64 then controls the drive motor 37 to start, causing its output shaft to rotate the required number of times.

[0036] Reference Figure 7 The container 61 includes a tank body 611, a tank neck 612 and a stopper 613 which are fixedly connected from bottom to top in sequence, and carbon disulfide is contained in the tank body 611. The tank neck 612 is in the shape of a circular tube, and the piston 62 is in the shape of a cylinder. The piston 62 is slidably connected to the tank neck 612. A stopper ring 614 for blocking the piston 62 is fixedly connected to the inner wall of the lower end of the tank neck 612. The inner diameter of the stopper ring 614 is smaller than the outer diameter of the piston 62. Therefore, the piston 62 is limited by the stopper cover 613 and the stopper ring 614 and cannot be separated from the tank neck 612, thereby ensuring the sealing of the container 61. Carbon disulfide cannot escape from the container 61 after vaporization.

[0037] Reference Figure 7 The stopper 613 is threadedly connected to the tank neck 612, and a through hole 6131 is provided in the middle of the stopper 613 to balance the air pressure and facilitate the up and down movement of the piston 62. The stopper 613 can be unscrewed to facilitate the replacement of the piston 62 and ensure the sealing performance.

[0038] The implementation principle of the heat dissipation-friendly low-voltage switch cabinet of the embodiment of the present application is: When the operating temperature exceeds 45°C, carbon disulfide vaporizes, increasing the pressure inside the container 61. The piston 62 moves upward under pressure, and the proximity switch 63 senses the proximity of the piston 62 and feeds back a signal to the PLC controller 64. The PLC controller 64 then controls the drive motor 37 to start, driving the upper brush bar 33 and the lower brush bar 34 to move to clean the surface of the filter 32, and driving the connecting frame 31 and the filter 32 to move upward along the guide bar 4, so that the heat dissipation hole 11 is fully opened to achieve emergency heat dissipation and ensure the normal operation of the switch cabinet.

[0039] When the working temperature drops to a normal range, the carbon disulfide re-condenses, the piston 62 is reset, and the PLC controller 64 controls the drive motor 37 to rotate in the reverse direction, so that the filter 32 is reset after cleaning, and continues to prevent dust and flying insects from entering the cabinet 1.

[0040] The above are all preferred embodiments of the present application, 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 low-voltage switch cabinet with easy heat dissipation, comprising a cabinet body (1) and a cabinet door (2) hinged to the cabinet body (1), wherein a side wall of the cabinet body (1) is provided with heat dissipation holes (11), characterized in that: A dustproof device (3) is arranged on the outside of the cabinet (1), and the dustproof device (3) comprises a connection frame (31) and a filter (32) fixedly connected to the inside of the connection frame (31), the filter (32) is directly opposite to the heat dissipation hole (11), and the upper and lower ends of the filter (32) are respectively attached with an upper brush bar (33) and a lower brush bar (34), and the upper brush bar (33) and the lower brush bar (34) are both arranged on a side of the filter (32) close to the cabinet (1), and the upper brush bar (33) and the lower brush bar (34) are respectively attached to the upper and lower ends of the filter (32). (34) One end portion thereof is connected to a cleaning rack (35), and the other end portion is provided with a guide rod (39) therethrough, the guide rod (39) being fixedly connected to the connecting frame (31), a cleaning gear (36) being meshed between the two cleaning racks (35), the cleaning gear (36) being rotatably connected to the connecting frame (31), a driving motor (37) being installed on a side of the connecting frame (31) away from the cabinet (1), and an output shaft of the driving motor (37) being connected to the cleaning gear (36).

2. The heat dissipation low-voltage switch cabinet according to claim 1, characterized in that: A guide bar (4) and a lifting rack (5) are respectively arranged on both sides of the connection frame (31); the guide bar (4) and the lifting rack (5) are both fixedly connected to the cabinet (1); the connection frame (31) is slidably connected to the guide bar (4) in a vertical direction; the lifting rack (5) is meshed with a lifting gear (38); and the lifting gear (38) is coaxially fixedly connected to the cleaning gear (36).

3. The heat dissipation low-voltage switch cabinet according to claim 2 is characterized in that: A driving device (6) is arranged inside the cabinet (1), and the driving device (6) comprises a container (61) containing carbon disulfide, a piston (62) slidably connected to the container (61), a proximity switch (63) arranged on one side of the top end of the container (61), and a PLC controller (64) installed on the inner wall of the cabinet (1); the container (61) is made of a transparent material, the proximity switch (63) is electrically connected to the PLC controller (64), and the PLC controller (64) is electrically connected to the driving motor (37).

4. The heat dissipation low-voltage switch cabinet according to claim 3 is characterized in that: The container (61) comprises a tank body (611), a tank neck (612) and a blocking cover (613) which are connected in sequence from bottom to top; the carbon disulfide is contained in the tank body (611); the piston (62) is slidably connected to the tank neck (612); and a blocking ring (614) for blocking the piston (62) is fixedly connected to the inner wall of the lower end of the tank neck (612).

5. The heat dissipation low-voltage switch cabinet according to claim 4, characterized in that: The blocking cover (613) is threadedly connected to the tank neck (612), and the blocking cover (613) is provided with a through hole (6131).

6. The heat dissipation low-voltage switch cabinet according to claim 2, characterized in that: When the upper brush strip (33) and the lower brush strip (34) are attached, the filter screen (32) and the heat dissipation hole (11) are misaligned.

7. The heat dissipation low-voltage switch cabinet according to claim 2, characterized in that: An upper slide bar (331) is connected between the upper brush bar (33) and the cleaning rack (35), and a lower slide bar (341) is connected between the lower brush bar (34) and the cleaning rack (35). The inner wall of the connecting frame (31) is provided with a slide groove (311) for the upper slide bar (331) and the lower slide bar (341) to slide. The upper slide bar (331) is longer than the lower slide bar (341). The upper slide bar (331) is provided with a clearance hole (3311) for the corresponding cleaning rack (35) to pass through.

8. The heat dissipation low-voltage switch cabinet according to claim 7, characterized in that: A rotating shaft (361) is fixedly connected in the middle of the lifting gear (38) and the cleaning gear (36); the rotating shaft (361) is rotatably connected between the two inner walls of the slide groove (311); and a through hole (312) for the lifting gear (38) to extend out is provided on one side of the connection frame (31) close to the lifting rack (5).

9. The heat dissipation low-voltage switch cabinet according to claim 2, characterized in that: The side wall of the connection frame (31) is provided with a guide groove (313) for the guide strip (4) to be inserted.

Images