A self-cleaning device for power cabinet

Abstract

The present invention is applicable to the technical field of electric power equipment, and provides a self-cleaning device for an electric power cabinet, comprising an electric power cabinet body and a ventilation grille; a blower is arranged on the top of the electric power cabinet body, and an exhaust fan is arranged on the side thereof; installation openings are provided on two opposite side surfaces of the electric power cabinet body; the ventilation grille comprises a fixed frame plugged into the installation opening; a grille piece is fixedly connected to the side surface of the fixed frame; the grille piece comprises an installation frame; a plurality of fixed shells are evenly fixed between the inner walls of the installation frame; installation grooves are provided on the surface of the fixed shells; an elastic diaphragm is arranged between the inner walls of the installation grooves; an arc-shaped baffle plate adapted to the elastic diaphragm is fixed to the bottom surface of the fixed shell; the device realizes the closure of the ventilation grille through the linkage cooperation between the various components, and in the process of each group of vertical pipes supplying gas to the corresponding fixed shell, part of the gas is sent into the horizontal pipe through the corresponding branch pipe, and is sprayed out through each group of nozzles to blow away the dust adhered to the surface of the inclined grille, thereby improving the cleaning effect of the electric power cabinet body.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and more specifically, to a self-cleaning device for an electric power cabinet. Background Art

[0002] The power cabinet includes distribution cabinets, meter boxes, etc. It is a device for storing power control related equipment. During operation, power equipment consumes a lot of energy and generates a lot of heat. Traditional power cabinets have low heat dissipation efficiency, easily accumulate dust, and are difficult to clean.

[0003] After searching, a self-cleaning device for an electric cabinet with publication number CN116053944B was found. The self-cleaning device for an electric cabinet seals the electric cabinet as a whole. The circulating airflow can send the dust deposited in the electric cabinet into the dust storage tank. During the cleaning process, the dust will not escape to the outside of the electric cabinet to pollute the environment. The self-cleaning of the electric cabinet can be completed through regular cleaning, and the staff only needs to empty the dust in the dust storage tank regularly.

[0004] However, the above-mentioned power cabinet cleaning device is started at a fixed time by the PLC controller, which controls the three rolling shutter boxes to lower the curtains, and the curtains fall into the U-shaped slots, between the first side card plate, the second side card plate and the cabinet side wall, and then the electromagnet is energized to suck the iron bar at the bottom of the curtain, and the two telescopic cylinders are actuated to clamp the curtain to the cabinet side wall through the clamping plate, thus forming an enclosed space for the entire power cabinet. The above-mentioned structure is relatively complex and occupies a larger internal space of the power cabinet. At the same time, the ventilation grille is fixedly installed on the inner wall of the power cabinet, which makes it inconvenient to timely deal with the dust adhered to the gate surfaces, thereby reducing the self-cleaning effect of the power cabinet. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a self-cleaning device for an electric power cabinet, which realizes the closure of the ventilation grille through the linkage cooperation between various components. In the process of each group of vertical pipes transmitting gas to the corresponding fixed shell, part of the gas is sent into the horizontal pipe through the corresponding branch pipe and sprayed out through each group of nozzles to blow away the dust adhered to the surface of the inclined grille, thereby improving the cleaning effect of the electric power cabinet body.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A self-cleaning device for an electric cabinet comprises an electric cabinet body and a ventilation grille symmetrically arranged on the electric cabinet body; a blower is arranged on the top of the electric cabinet body, and an exhaust fan is arranged on the side thereof; mounting openings are provided on two opposite sides of the electric cabinet body; the ventilation grille comprises a fixed frame inserted in the mounting opening; a grille member is fixedly connected to the side of the fixed frame; the grille member comprises a mounting frame; a plurality of fixed shells are evenly fixed between the inner walls of the mounting frame; mounting grooves are provided on the surface of the fixed shells; an elastic diaphragm is arranged between the inner walls of the mounting grooves; an arc-shaped baffle matched with the elastic diaphragm is fixed to the bottom surface of the fixed shell; vertical pipes are arranged through the surface of each fixed shell; a plurality of connecting pipes are arranged on the top of the electric cabinet body for rotation by thread; the bottom end of the connecting pipe is screwed to the corresponding vertical pipe, and the top end thereof is connected to the air inlet of the blower through a hose.

[0008] The present invention is further configured as follows: a sealed door is hingedly provided on the side of the power cabinet body, and a controller is provided inside the door; the output end of the controller is electrically connected to the blower and the exhaust fan respectively; a threaded pipe is fixed to the air outlet of the exhaust fan; a screw ring is screwed on the threaded pipe; a dust removal bag is connected to the end of the screw ring; a plurality of screw holes that are rotatably matched with the connecting pipe threads are evenly opened on the top of the power cabinet body.

[0009] The present invention is further configured as follows: an air intake pipe is fixed to the air inlet of the blower; a filter cover is provided at the top of the air intake pipe; an air connecting pipe coaxially arranged therewith is provided inside the air intake pipe; the bottom of the air connecting pipe is sealed, and air supply pipes are symmetrically connected to the side surfaces thereof; the air supply pipe passes through the air intake pipe and extends outward; an air collecting box is fixed to the end of the air supply pipe; a number of mounting pipes are evenly connected to the side surfaces of the air collecting box; each mounting pipe is connected to the corresponding connecting pipe by a hose.

[0010] The present invention is further configured as follows: a plurality of inclined grooves are provided on both sides of the inner wall of the fixing frame from top to bottom; a rectangular groove is provided on the side of the fixing frame; and an inclined grid plate is provided on each side of the fixing shell to slide with the corresponding inclined groove.

[0011] The present invention is further configured as follows: a sealing frame is provided on the side of the installation frame and is plugged into the rectangular groove; a plurality of first installation holes are evenly opened on the side of the fixed frame; a plurality of second installation holes are evenly opened on the side of the installation frame; the first installation holes are fixedly connected with the corresponding second installation holes by fastening bolts.

[0012] The present invention is further configured as follows: each vertical pipe peripheral side surface is connected to a branch pipe penetrating the corresponding arc-shaped baffle near its bottom end; the branch pipe end is connected to a horizontal pipe; and the horizontal pipe peripheral side surface is connected to a plurality of nozzles inclined downward.

[0013] The present invention is further configured as follows: sliding parts are symmetrically arranged on the surface of the fixed shell on both sides of the elastic diaphragm for sliding; the sliding parts include a sliding base plate; arc-shaped side plates adapted to the elastic diaphragm are fixed on the side of the sliding base plate; a plurality of avoidance grooves that slide with corresponding vertical pipes are opened on the side of the sliding base plate.

[0014] The present invention is further configured as follows: U-shaped tubes are penetrated and connected to the two opposite inner walls of the fixed shell; ear plates are symmetrically fixed to the surface of the fixed shell; a piston cylinder is penetrated and provided on the side of the ear plate; the end of the piston cylinder is penetrated and connected to one end of the U-shaped tube; a connecting rod is fixed to the arc-shaped side plate; a piston that slides with the piston cylinder is fixed to the end of the connecting rod; a return spring is fixedly connected between the side of the piston and the piston cylinder.

[0015] The advantages of the present invention are:

[0016] 1. The present invention completes the fixed position limitation of the ventilation grille by inserting the ventilation grille into the corresponding installation port, and rotating the corresponding connecting pipe to make it rotate and descend to be screwed with the corresponding vertical pipe. At the same time, the connection between each group of fixed shells and the air intake pipe is completed. The whole device has a simple structure and avoids occupying a large space inside the power cabinet body.

[0017] 2. After the present invention completes the assembly of the ventilation grille and the power cabinet body, the blower and the exhaust fan are started regularly through the controller. Part of the air blown in by the blower enters the corresponding vertical pipe through each hose, and inflates the corresponding fixed shell. As the air pressure inside the fixed shell gradually increases, the elastic diaphragm is inflated and expanded to fit on the arc-shaped baffle, completing the closure of the ventilation grille. The circulating airflow can send the dust deposited in the power cabinet body into the dust removal bag. During the cleaning process, the dust will not escape to the outside of the power cabinet body to pollute the environment. The self-cleaning of the power cabinet body can be completed through regular cleaning, thereby improving the cleaning effect of the power cabinet body.

[0018] 3. In the process of each group of vertical pipes of the present invention transmitting gas to the corresponding fixed shell, part of the gas is sent into the horizontal pipe through the corresponding branch pipe and sprayed out through each group of nozzles to blow away the dust adhering to the surface of the inclined grid plate, further improving the cleaning effect of the power cabinet body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a self-cleaning device for a power cabinet of the present invention.

[0020] Figure 2 This is a schematic structural diagram of a self-cleaning device for a power cabinet of the present invention from another angle.

[0021] Figure 3 It is a structural schematic diagram of the power cabinet body of the present invention.

[0022] Figure 4 It is a schematic structural diagram of the ventilation grille of the present invention.

[0023] Figure 5 It is a schematic structural diagram of the ventilation grille of the present invention from another angle.

[0024] Figure 6 It is a schematic structural diagram of the ventilation grille of the present invention from a right side viewing angle.

[0025] Figure 7 For the present invention Figure 6 A magnified image of area A.

[0026] Figure 8 It is a structural schematic diagram of the fixing frame of the present invention.

[0027] Fig. 9 It is a schematic structural diagram of the grid plate member of the present invention.

[0028] Fig.10 It is a schematic structural diagram of the sliding part of the present invention.

[0029] Fig.11 It is a schematic structural diagram of the sliding member of the present invention when viewed from the right side.

[0030] Fig.12 It is a schematic diagram of the structure of the grid plate member of the present invention in a sealed state.

[0031] Fig.13 For the present invention Fig.12 A magnified view of area B.

[0032] Fig.14 It is a schematic diagram of the structure of the grid member of the present invention in a ventilation state.

[0033] Fig.15 For the present invention Fig.14 Magnified view of area C.

[0034] In the figure: 1, power cabinet body; 2, ventilation grille; 3, blower; 4, exhaust fan; 5, installation port; 6, fixing frame; 7, grille; 8, installation frame; 9, fixing shell; 10, elastic diaphragm; 11, arc baffle; 12, vertical pipe; 13, connecting pipe; 14, threaded pipe; 15, screw ring; 16, dust bag; 17, air inlet pipe; 18, filter cover; 19, air connection pipe; 20, air supply pipe; 21, air collecting box; 2 2. Mounting tube; 23. Inclined groove; 24. Rectangular groove; 25. Inclined grid plate; 26. Sealing frame; 27. First mounting hole; 28. Second mounting hole; 29. ​​Branch pipe; 30. Horizontal pipe; 31. Nozzle; 32. Sliding part; 33. Sliding bottom plate; 34. Arc side plate; 35. Avoidance groove; 36. U-shaped tube; 37. Ear plate; 38. Piston cylinder; 39. Connecting rod; 40. Piston; 41. Return spring; 42. Screw hole. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0037] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0038] For example, see Figure 1-15 , the present invention provides the following technical solutions:

[0039] A self-cleaning device for an electric cabinet, specifically, comprises an electric cabinet body 1 and a ventilation grille 2 symmetrically arranged on the electric cabinet body 1; a blower 3 is connected to the top of the electric cabinet body 1, and an exhaust fan 4 is connected to the side thereof; mounting openings 5 ​​are provided on two opposite sides of the electric cabinet body 1; the ventilation grille 2 comprises a fixing frame 6 inserted into the mounting opening 5; a grille member 7 is fixedly connected to the side of the fixing frame 6; the grille member 7 comprises a mounting frame 8; a plurality of fixing shells 9 are evenly fixed between the inner walls of the mounting frame 8; a mounting groove is provided on the surface of the fixing shell 9; an elastic diaphragm 10 is arranged between the inner walls of the mounting groove; an arc-shaped baffle 11 adapted to the elastic diaphragm 10 is fixed to the bottom surface of the fixing shell 9; vertical pipes 12 are penetrated and connected to the surface of each fixing shell 9; a plurality of connecting pipes 13 are threadedly arranged on the top of the electric cabinet body 1; the bottom end of the connecting pipe 13 is screwed to the corresponding vertical pipe 12, and the top end thereof is connected to the air inlet of the blower 3 through a hose.

[0040] Working principle of the first embodiment of the present invention: after completing the assembly of the ventilation grille 2 and the power cabinet body 1, the blower 3 and the exhaust fan 4 are started by the controller at a fixed time. Part of the air blown by the blower 3 enters the vertical pipe 12 and is inflated into the corresponding fixed shell 9. As the air pressure inside the fixed shell 9 gradually increases, the elastic diaphragm 10 is inflated and expanded to fit on the arc-shaped baffle 11, completing the closure of the ventilation grille 2. The circulating airflow can send the dust deposited in the power cabinet body 1 into the dust removal bag 16. During the cleaning process, the dust will not escape to the outside of the power cabinet body 1 to pollute the environment. The self-cleaning of the power cabinet body 1 can be completed through regular cleaning, thereby improving the cleaning effect of the power cabinet body 1.

[0041] For example 2, please refer to Figure 1-15 , the second embodiment of the present invention is improved as follows on the basis of the first embodiment. Specifically, a sealing door is hingedly provided on the side of the power cabinet body 1, and a controller is provided inside the door; the output end of the controller is electrically connected to the blower 3 and the exhaust fan 4 respectively; a threaded tube 14 is fixed to the air outlet of the exhaust fan 4; a screw ring 15 is screwed to the threaded tube 14; a dust bag 16 is connected to the end of the screw ring 15; a plurality of screw holes 42 that are rotatably matched with the thread of the connecting tube 13 are evenly provided on the top of the power cabinet body 1; an air inlet pipe 17 is fixed to the air inlet of the blower 3; a filter cover 18 is provided on the top of the air inlet pipe 17; an air connection pipe 19 that is coaxial with the air inlet pipe 17 is provided inside the air inlet pipe 17; the bottom of the air connection pipe 19 is sealed, and an air supply pipe 20 is symmetrically connected to the surrounding side surface; The air supply pipe 20 passes through the air intake pipe 17 and extends outward; an air collecting box 21 is fixed to the end of the air supply pipe 20; a number of mounting tubes 22 are evenly connected to the side of the air collecting box 21; each mounting tube 22 is connected to the corresponding connecting tube 13 by a hose; a number of inclined grooves 23 are provided on both sides of the inner wall of the fixed frame 6 from top to bottom; a rectangular groove 24 is provided on the side of the fixed frame 6; an inclined grid plate 25 that slides with the corresponding inclined groove 23 is provided on the side of each fixed shell 9; a sealing frame 26 that plugs with the rectangular groove 24 is provided on the side of the mounting frame 8; a number of first mounting holes 27 are evenly provided on the side of the fixed frame 6; a number of second mounting holes 28 are evenly provided on the side of the mounting frame 8; the first mounting hole 27 is fixedly connected with the corresponding second mounting hole 28 by fastening bolts.

[0042] The working principle of the second embodiment is as follows: the ventilation grille 2 is assembled by inserting the sealing frame 26 into the rectangular groove 24 and fixing the mounting frame 8 to the side of the fixing frame 6 by tightening the bolts; the assembled ventilation grille 2 is inserted into the corresponding mounting opening 5, and each group of connecting pipes 13 is rotated in turn to make them rotate and descend and screwed with the corresponding vertical pipes 12, so as to complete the limited fixation of the ventilation grille 2 and the power cabinet body 1. The whole device has a simple structure, occupies a small area, and is easy to install.

[0043] The blower 3 is controlled by a controller to start at a fixed time, and the external air is blown into the power cabinet body 1 through the air inlet pipe 17. At the same time, the exhaust fan 4 is controlled to start at a fixed time and synchronously. The circulating airflow can send the dust deposited in the power cabinet body 1 into the dust removal bag 16 through the threaded pipe 14. During the cleaning process, the dust will not escape to the outside of the power cabinet body 1 to pollute the environment. The self-cleaning of the power cabinet body 1 can be completed through regular cleaning. The staff only needs to empty the dust in the dust removal bag 16 regularly.

[0044] During the operation of the blower 3, part of the air flow entering the air inlet pipe 17 enters the corresponding connecting pipe 13 through the air connecting pipe 19, the air supply pipe 20, the air collecting box 21, the installation pipes 22 and the hoses in turn, and then enters the corresponding fixed shell 9 through the corresponding vertical pipe 12. Each group of vertical pipes 12 is only connected to the corresponding fixed shell 9, and is sealed with the remaining corresponding fixed shells 9.

[0045] For example 3, please refer to Figure 1-15 The third embodiment makes the following improvements on the basis of the first embodiment. Specifically, each vertical tube 12 is connected to a branch tube 29 penetrating the corresponding arc-shaped baffle 11 near its bottom end on the side surface thereof; a transverse tube 30 is connected to the end of the branch tube 29; and a plurality of nozzles 31 are connected to the side surface of the transverse tube 30 and tilted downward.

[0046] Working principle of the third embodiment: during the process of each group of vertical pipes 12 supplying gas to the corresponding fixed shell 9, part of the gas is sent into the horizontal pipe 30 through the corresponding branch pipe 29 and is sprayed out through each group of nozzles 31, blowing away the dust adhered to the surface of the inclined grid plate 25, further improving the cleaning effect of the power cabinet body 1.

[0047] Example 4, please refer to Figure 1-15 , the fourth embodiment of the present invention is improved as follows on the basis of the first embodiment. Specifically, sliding members 32 are symmetrically and slidably arranged on the surface of the fixed shell 9 on both sides of the elastic diaphragm 10; the sliding members 32 include a sliding bottom plate 33; an arc-shaped side plate 34 adapted to the elastic diaphragm 10 is fixed on the side of the sliding bottom plate 33; a plurality of avoidance grooves 35 slidingly matched with the corresponding vertical pipes 12 are opened on the side of the sliding bottom plate 33; U-shaped tubes 36 are penetrated and connected to the two opposite inner walls of the fixed shell 9; ear plates 37 are symmetrically fixed on the surface of the fixed shell 9; a piston cylinder 38 is penetrated and arranged on the side of the ear plate 37; the end of the piston cylinder 38 is penetrated and connected with one end of the U-shaped tube 36; a connecting rod 39 is fixed to the arc-shaped side plate 34; a piston 40 slidingly matched with the piston cylinder 38 is fixed to the end of the connecting rod 39; a return spring 41 is fixedly connected between the side of the piston 40 and the piston cylinder 38.

[0048] Working principle of the fourth embodiment: the deformation capacity of the return spring 41 is higher than that of the elastic diaphragm 10, that is, under the same pressure conditions, the return spring 41 is deformed first, when part of the air blown by the blower 3 enters the corresponding vertical pipe 12 through each hose, and inflates the corresponding fixed shell 9, as the internal air pressure of the fixed shell 9 gradually increases, the air flow enters the piston cylinder 38 through the U-shaped tube 36, driving the piston 40 to move along the piston cylinder 38, and the corresponding return spring 41 is stretched, so that the two sliding bottom plates 33 slide close to each other until the two arc-shaped side plates 34 abut against the side of the arc-shaped baffle plate 11, preventing the subsequent elastic diaphragm 10 from passing Due to expansion and bursting, the elastic diaphragm 10 remains in a safe inflated state; as the air pressure inside the fixed shell 9 gradually increases, the elastic diaphragm 10 inflates and expands to fit on the arc baffle 11 and fit between the two arc-shaped side plates 34, completing the closure of the ventilation fence 2, so that the inside of the power cabinet body 1 remains in a relatively sealed state, and the circulating airflow can send the dust deposited in the power cabinet body 1 into the dust removal bag 16. During the cleaning process, the dust will not escape to the outside of the power cabinet body 1 to pollute the environment. The self-cleaning of the power cabinet body 1 can be completed through regular cleaning, thereby improving the cleaning effect of the power cabinet body 1.

[0049] After completing the cleaning of the dust inside the power cabinet body 1, turn off the blower 3 and the exhaust fan 4, so that each group of fixed shells 9 is connected to the outside world through the corresponding vertical pipes 12 and branch pipes 29. At the same time, under the elastic reset force of the corresponding reset spring 41 and the elastic diaphragm 10, the corresponding sliding member 32 slides away from the thrust of the corresponding arc baffle 11, and the elastic diaphragm 10 is reset, so that the ventilation grille 2 is in an open state, which is convenient for the flow of air between the outside world and the power cabinet body 1.

[0050] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0054] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A self-cleaning device for a power cabinet, comprising a power cabinet body and a ventilation grille symmetrically arranged on the power cabinet body; characterized in that: A blower is connected to the top of the power cabinet body, and an exhaust fan is connected to the side thereof; Two opposite sides of the power cabinet body are provided with installation openings; the ventilation grille includes a fixing frame inserted into the installation opening; a grille piece is fixedly connected to the side of the fixing frame; The grid plate comprises a mounting frame; a plurality of fixed shells are evenly fixed between the inner walls of the mounting frame; mounting grooves are provided on the surface of the fixed shells; elastic diaphragms are provided between the inner walls of the mounting grooves; an arc-shaped baffle plate adapted to the elastic diaphragm is fixed on the bottom surface of the fixed shells; and vertical pipes are provided through and connected to the surfaces of the fixed shells; A plurality of connecting pipes are provided on the top of the power cabinet body by screw thread rotation; the bottom ends of the connecting pipes are screwed to the corresponding vertical pipes, and the top ends thereof are connected to the air inlet of the blower through a hose; A sealed door is hingedly provided on the side of the power cabinet body, and a controller is provided inside the door; the output end of the controller is electrically connected to the blower and the exhaust fan respectively; a threaded pipe is fixed to the exhaust fan outlet; a screw ring is screwed to the threaded pipe; a dust bag is connected to the end of the screw ring; a plurality of screw holes are evenly provided on the top of the power cabinet body to rotate with the connection pipe thread; The fixed shell surface is symmetrically provided with sliding parts on both sides of the elastic diaphragm; the sliding parts include a sliding bottom plate; arc-shaped side plates adapted to the elastic diaphragm are fixed on the side of the sliding bottom plate; a plurality of avoidance grooves are provided on the side of the sliding bottom plate to slide with the corresponding vertical pipes; U-shaped tubes are penetrated and connected to the two opposite inner walls of the fixed shell; ear plates are symmetrically fixed on the surface of the fixed shell; a piston cylinder is penetrated and arranged on the side of the ear plate; the end of the piston cylinder is penetrated and connected to one end of the U-shaped tube; a connecting rod is fixed to the arc side plate; a piston that slides with the piston cylinder is fixed to the end of the connecting rod; a return spring is fixedly connected between the side of the piston and the piston cylinder.

2. A self-cleaning device for a power cabinet according to claim 1, characterized in that: An air intake pipe is fixed to the air inlet of the blower; a filter cover is provided at the top of the air intake pipe; an air connecting pipe coaxially arranged therewith is provided inside the air intake pipe; the bottom of the air connecting pipe is sealed, and air supply pipes are symmetrically connected to the sides thereof; the air supply pipes penetrate the air intake pipe and extend outward; an air collecting box is fixed to the end of the air supply pipe; a number of mounting pipes are evenly connected to the sides of the air collecting box; each mounting pipe is connected to the corresponding connecting pipe by a hose.

3. A self-cleaning device for a power cabinet according to claim 2, characterized in that: A plurality of oblique grooves are provided on both sides of the inner wall of the fixed frame from top to bottom; a rectangular groove is provided on the side of the fixed frame; and an oblique grid plate which is slidably matched with the corresponding oblique groove is provided on the side of each fixed shell.

4. A self-cleaning device for a power cabinet according to claim 3, characterized in that: A sealing frame is arranged on the side of the installation frame and is plugged into the rectangular groove; a plurality of first installation holes are evenly arranged on the side of the fixing frame; a plurality of second installation holes are evenly arranged on the side of the installation frame; and the first installation holes are fixedly connected with the corresponding second installation holes by fastening bolts.

5. A self-cleaning device for a power cabinet according to claim 4, characterized in that: Each vertical pipe is connected to a branch pipe penetrating the corresponding arc-shaped baffle near its bottom; the end of the branch pipe is connected to a horizontal pipe; and a plurality of nozzles are connected to the horizontal pipe at a slanting downward side.

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