Air insulation ring main unit

Abstract

The invention relates to the technical field of ring main units, and discloses an air insulation ring main unit which comprises a cabinet body, two opposite side faces of the cabinet body are provided with an air inlet and an air outlet respectively, and the air inlet and the air outlet are distributed in a high-low mode; the air inlet assembly is communicated with the air inlet, and the air inlet assembly introduces low-temperature air into the cabinet body through the air inlet; the dehumidifier is fixedly mounted in the cabinet body, and the dehumidifier is communicated with the air outlet end of the air inlet assembly; the filter assembly comprises a filter element, the filter element is rotatably mounted in the middle of the air inlet, and air penetrating through the air inlet is filtered through the filter element; the driving assembly is connected with the air inlet assembly, and the driving assembly drives the air inlet assembly to operate and drives the filter element to rotate. According to the invention, air entering the main unit can be effectively ensured to be dry, so that the whole ring main unit can be suitable for more different use scenes, and the application range is effectively expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of ring main units, and more particularly to an air-insulated ring main unit. Background Art

[0002] An air-insulated ring main unit is a medium-voltage power distribution device that uses dry air as an insulating medium, and has characteristics such as environmental protection, safety, and reliability. It is widely used in urban distribution networks, industrial power distribution and other fields. Compared with traditional SF6 gas-insulated ring main units, the air-insulated ring main unit has the following advantages: environmental protection, higher safety, and economy.

[0003] For example, in the prior art, a patent document with the publication number CN110165591B discloses a ring main unit, including a cabinet body, a door panel, a heat dissipation structure, a cleaning structure, a filtering structure, a first sealing structure and a second sealing structure; through the cleaning structure installed at the top of the cabinet body, it can not only collect the rainwater on rainy days to dissipate heat from the cabinet body, but also timely clean the leaves falling on the top of the cabinet body, so as to avoid the leaves blocking the cleaning structure and affecting the heat dissipation work of the cabinet body. And while the cleaning structure is working, it can drive the heat dissipation structure at the top of the cabinet body to work synchronously. Through the work of the heat dissipation structure, the air exchange between the inside and outside of the cabinet body can be quickly realized, so as to quickly dissipate the heat inside the cabinet body, thereby avoiding the self-ignition of high-power electrical components inside the cabinet body due to excessive temperature. And through the work of the heat dissipation structure, it can also act on the cleaning structure, making the heat dissipation effect of the cleaning structure better.

[0004] Currently, during the use of existing air-insulated ring main units, most of them need to be installed in dry areas to ensure that the air inside is always dry. Otherwise, the air inside is likely to be humid, which may lead to poor insulation and cause danger. As a result, this undoubtedly greatly limits their places of use. Based on this, when used in places with high air humidity, there is a problem of easy moisture absorption during the ventilation and heat dissipation process of existing ring main units, and the use is very unsafe. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an air-insulated ring main unit to solve the problem of easy moisture absorption during the ventilation and heat dissipation process of existing ring main units when used in places with high air humidity.

[0006] The present invention provides the following technical solutions: an air-insulated ring network cabinet, comprising: a cabinet body, wherein two opposite sides of the cabinet body are respectively provided with an air inlet and an air outlet, and the air outlet and the air inlet are distributed in high and low positions; an air intake assembly, wherein the air intake assembly is connected with the air inlet, and the air intake assembly introduces low-temperature air into the cabinet body through the air inlet; a dehumidifier, wherein the dehumidifier is fixedly installed in the cabinet body, and the dehumidifier is connected with the air outlet end of the air intake assembly; a filter assembly, wherein the filter assembly comprises a filter element, the filter element is rotatably installed in the middle of the air inlet, and the air passing through the air inlet is filtered by the filter element; a drive assembly, wherein the drive assembly is connected with the air intake assembly, and the air intake assembly is driven to operate and the filter element is driven to rotate by the drive assembly.

[0007] Furthermore, the air intake assembly includes an air intake pipe and fan blades. The air intake pipe is connected between the air inlet and the air inlet end of the dehumidifier. A partition is installed in the middle of the air intake pipe, and the partition divides the middle of the air intake pipe into an air intake chamber and a cleaning chamber. One end of the air intake chamber is connected to the air inlet, and the other end is connected to the air inlet end of the dehumidifier. The fan blades are rotatably installed in the middle of the air intake chamber, and the suction surface of the fan blades faces the air inlet.

[0008] Among them, a pump air assembly and a back-blowing orifice plate are fixedly installed in the cleaning chamber, the inlet end of the back-blowing orifice plate is connected to the pump air assembly, and the outlet end of the back-blowing orifice plate faces the filter element, thereby realizing the back-blowing and clearing function.

[0009] A sensing plate is rotatably installed in the air intake chamber, and a transmission mechanism is arranged in the air intake pipe. When the sensing plate senses the change of airflow in the air intake chamber, the sensing plate swings and triggers the action of the pump air assembly through the transmission mechanism, so that the pump air assembly injects air into the back-blowing orifice plate, so that the back-blowing has the function of automatic start and stop.

[0010] Furthermore, the filter assembly includes a bracket and an end cover. The bracket is rotatably installed in the middle of the air inlet, and the rotating shaft of the bracket passes through the fan blade rotating shaft. The filter element is installed in the middle of the bracket and can rotate synchronously with the bracket. At the same time, the filter element covers the air inlet. The end cover is detachably clamped on the air inlet, and the filter element is limited by the end cover to facilitate the disassembly and replacement of the filter element.

[0011] Furthermore, the driving assembly includes a motor, a first pulley, a first belt, a reducer, a second pulley and a second belt. The motor is fixedly mounted on the surface of the intake pipe, and the motor output shaft and the fan blade shaft are transmitted through the first pulley and the first belt. The reducer is fixedly connected to the surface of the intake pipe, the output shaft of the motor is coaxially connected to the reducer input shaft, and the output shaft of the reducer and the bracket shaft are transmitted through the second pulley and the second belt, and the fan blades are driven to rotate through the driving assembly.

[0012] Further, the air pumping assembly includes a cylinder liner, a piston, an air outlet pipe and a valve. The cylinder liner is fixedly installed in the cleaning chamber. The piston is slidably installed in the cylinder liner. An air inlet hole is provided on the surface of the piston. A check valve is provided in the middle of the air inlet hole. Under the action of the check valve, external air can only enter the middle of the cylinder liner from the cleaning chamber. The air outlet pipe is communicated with the air outlet hole of the cylinder liner. The valve is installed on the air outlet pipe. A connecting rod is provided between the valve and the piston. One end of the connecting rod is rotatably connected to the switch knob of the valve, and the other end is drivingly connected to the piston. When the piston moves to be close to the inner side surface of the cylinder liner, the piston will drive the switch knob of the valve to open through the connecting rod, so that the air pumping assembly can supply air to the backflush orifice plate.

[0013] Further, the driving assembly further includes a first gear, a second gear, a reciprocating lead screw and a threaded seat. The first gear is arranged in the cleaning chamber and fixedly installed on the rotating shaft of the bracket. The reciprocating lead screw is rotatably installed in the cleaning chamber, and the second gear is fixedly installed on the surface of the reciprocating lead screw. At the same time, the first gear can be meshed with the second gear. The threaded seat is threadedly installed on the surface of the reciprocating lead screw, and the lower end of the threaded seat is fixedly connected to the piston. The end of the connecting rod is rotatably connected to the lower end of the threaded seat. The connecting rod is drivingly connected to the piston through the threaded seat, and the air pumping assembly is driven to work through the driving assembly.

[0014] Further, the transmission mechanism includes a sliding sleeve, a first spring and a second spring. The sliding sleeve is fixedly installed in the cleaning chamber. The reciprocating lead screw can slide reciprocally along its axis. One end of the reciprocating lead screw is slidably inserted into the sliding sleeve, and the other end passes through the partition plate and extends into the air inlet chamber and contacts the induction plate. Both the first spring and the second spring are compression springs. The first spring is installed between the inner end of the sliding sleeve and the end of the reciprocating lead screw, and the second spring is installed between the induction plate and the bearing of the fan blade rotating shaft. When the wind speed in the air inlet pipe decreases, the second spring can push the induction plate to rotate, drive the reciprocating lead screw to slide through the induction plate, make the first gear and the second gear meshed, and trigger the air pumping assembly to act through the transmission mechanism.

[0015] Further, a window is opened on the end cover, and the window corresponds to the position of the air inlet of the air inlet chamber. A dust discharge channel is fixedly installed on the end cover, and the dust discharge channel corresponds to the position of the mouth of the cleaning chamber. The dust blown off by the filter element can be discharged from the dust discharge channel, which is convenient for dust collection.

[0016] The technical effects and advantages of the present invention: 1. For the ring main unit proposed by the present invention, by arranging a filtering assembly at the air inlet of the dehumidifier, after the external air is filtered and dehumidified, it is input into the ring main unit, which can effectively ensure that the air entering the ring main unit is dry, meet the requirements for the use of the ring main unit in a humid environment, so that the entire ring main unit can be applied to more different usage scenarios, and effectively improve the scope of application.

[0017] 2. The ring main unit proposed by the present invention, by setting a rotatable filter element, a pumping air assembly and a backwashing orifice plate, when the motor drives the fan blade to rotate and conveys cooling air to the cabinet body, it simultaneously drives the pumping air assembly to act and injects air into the backwashing orifice plate. Since the filter element is in a rotating state, the air flow discharged from the backwashing orifice plate can backwash the filter element, prompting the dust generated by filtration to separate from the filter element, achieving the effects of automatic dust discharge and blockage cleaning, ensuring smooth air intake, and prolonging the service life of the filter element.

[0018] 3. The ring main unit proposed by the present invention, by setting an induction plate and a transmission assembly, during the use process, when the dust accumulates too much on the surface of the filter element and affects the air intake volume of the air intake assembly, the wind speed in the intake pipe will decrease, thereby triggering the induction plate to act. The induction plate pushes the reciprocating lead screw to move so that the second gear meshes with the first gear. At this time, the rotating shaft of the bracket that drives the filter element to rotate will synchronously drive the reciprocating lead screw to move, and then drive the piston to move to generate high-pressure air in the cylinder sleeve. And when the piston moves close to the inner end of the cylinder sleeve, it will also synchronously open the valve on the outlet pipe connected to the outlet end of the cylinder sleeve to quickly release the high-pressure air inside the cylinder sleeve to backwash and clean the filter element, realizing the automatic start-stop control of the backwashing function, and ensuring the stable and reliable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the three-dimensional structure of the ring main unit proposed by the present invention Figure 1 ; Figure 2 Schematic diagram of the three-dimensional structure of the ring main unit proposed by the present invention Figure 2 ; Figure 3 Schematic diagram of the three-dimensional structure of the ring main unit proposed by the present invention Figure 3 ; Figure 4 is Figure 3 the enlarged structure schematic diagram at position A in Figure 5 is Figure 4 the enlarged structure schematic diagram at position B in Figure 6 Schematic diagram of the internal structure of the intake pipe proposed by the present invention; Figure 7 Schematic diagram of the front cross-section structure of the intake pipe proposed by the present invention.

[0020] The reference numerals are: 1, cabinet body; 2, air inlet; 3, air outlet; 4, dehumidifier; 5, filter element; 6, intake pipe; 7, fan blade; 8, partition board; 9, intake cavity; 10, cleaning cavity; 11, bracket; 12, end cover; 13, window; 14, dust exhaust passage; 15, cylinder liner; 16, piston; 17, outlet pipe; 18, valve; 19, backwashing orifice plate; 20, connecting rod; 21, motor; 22, reducer; 23, first pulley; 24, first belt; 25, second pulley; 26, second belt; 27, first gear; 28, second gear; 29, reciprocating lead screw; 30, threaded seat; 31, induction plate; 32, sliding sleeve; 33, first spring; 34, second spring. Detailed implementation manners

[0021] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples, and are not limited to the various structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0022] Refer to Figures 1-7 , the present invention provides an air-insulated ring main unit, including: a cabinet body 1, air inlets 2 and air outlets 3 are respectively opened on two opposite side surfaces of the cabinet body 1, and the air outlet 3 and the air inlet 2 are distributed at different heights, as shown in detail in Figure 1 、 Figure 2 ; An intake assembly, the intake assembly is communicated with the air inlet 2, and the intake assembly introduces low-temperature air into the cabinet body 1 through the air inlet 2; A dehumidifier 4, the dehumidifier 4 is fixedly installed in the cabinet body 1, and the dehumidifier 4 is communicated with the outlet end of the intake assembly; A filtering assembly, the filtering assembly includes a filter element 5, the filter element 5 is rotatably installed in the middle of the air inlet 2, and the air passing through the air inlet 2 is filtered by the filter element 5; A driving assembly, the driving assembly is connected to the intake assembly, and the driving assembly drives the intake assembly to operate and the filter element 5 to rotate.

[0023] Refer to Figure 4 , the intake assembly includes an intake pipe 6 and a fan blade 7, the intake pipe 6 is communicated between the air inlet 2 and the intake end of the dehumidifier 4, a partition board 8 is installed in the middle of the intake pipe 6, and the partition board 8 divides the middle of the intake pipe 6 into an intake cavity 9 and a cleaning cavity 10. A perforation is opened on the surface of the partition board 8, and the air in the intake cavity 9 can enter the cleaning cavity 10 through the perforation. One end of the intake cavity 9 is communicated with the air inlet 2, and the other end is communicated with the intake end of the dehumidifier 4. The fan blade 7 is rotatably installed in the middle of the intake cavity 9, and the air suction surface of the fan blade 7 faces the air inlet 2.

[0024] Specifically, as Figure 6 shown, the filtering component further includes a bracket 11 and an end cap 12. The bracket 11 is rotatably installed in the middle of the air inlet 2, and the rotating shaft of the bracket 11 passes through the rotating shaft of the fan blade 7. The filter element 5 is installed in the middle of the bracket 11 and can rotate synchronously with the bracket 11. At the same time, the filter element 5 covers the air inlet 2. The end cap 12 is detachably clamped on the air inlet 2, and the filter element 5 is limited by the end cap 12.

[0025] As Figure 4 shown, the driving component includes a motor 21, a first pulley 23, a first belt 24, a speed reducer 22, a second pulley 25 and a second belt 26. The motor 21 is fixedly installed on the surface of the intake pipe 6, and the output shaft of the motor 21 is transmitted to the rotating shaft of the fan blade 7 through the first pulley 23 and the first belt 24. The speed reducer 22 is fixedly connected to the surface of the intake pipe 6. The output shaft of the motor 21 is coaxially connected to the input shaft of the speed reducer 22. The output shaft of the speed reducer 22 is transmitted to the rotating shaft of the bracket 11 through the second pulley 25 and the second belt 26.

[0026] During use, the fan blade 7 rotates, and external air is inhaled from the air inlet 2 through the air intake component. The air will enter the cabinet body 1 through the dehumidifier 4. The dehumidifier 4 can remove the moisture in the air to ensure that the air input into the cabinet body 1 is dry, so that the entire ring main unit can be applied to humid areas. At the same time, the filtering component will remove dust from the incoming air. It should be noted that the dehumidifier 4 is a mature product of the prior art and will not be elaborated here.

[0027] For the ring main unit proposed by the present invention, by arranging a filtering component at the air inlet of the dehumidifier 4, after the external air is filtered and dehumidified, it is input into the ring main unit, which can effectively ensure that the air entering the ring main unit is dry, meet the requirements for using the ring main unit in a humid environment, so that the entire ring main unit can be applied to more different usage scenarios, and effectively improve the scope of application.

[0028] In this embodiment, a gas pumping component and a backwashing orifice plate 19 are fixedly installed in the cleaning chamber 10. The inlet end of the backwashing orifice plate 19 is communicated with the gas pumping component. Refer to Figure 6 , a row of air outlets is arranged on the surface of the backwashing orifice plate 19. The outlet end of the backwashing orifice plate 19 faces the filter element 5. A window 13 is opened on the end cap 12, and the window 13 corresponds to the inlet position of the air intake chamber 9. A dust discharge channel 14 is fixedly installed on the end cap 12, and the dust discharge channel 14 corresponds to the mouth position of the cleaning chamber 10. The dust blown off the filter element 5 can be discharged from the dust discharge channel 14.

[0029] When the motor 21 drives the fan blade 7 to rotate, the bracket 11 will also rotate synchronously, so that the filter element 5 is in a rotating state. The filter element 5 intercepts the dust in the air. Since the filter element 5 always rotates, it can prevent serious local blockage of the filter element 5 and ensure that enough air volume enters the intake pipe 6.

[0030] The ring main unit proposed in the present invention is provided with a rotatable filter element 5, a pump air assembly and a back-blowing orifice plate 19, as shown in FIG. Figure 7 As shown, the motor 21 drives the fan blades 7 to rotate, and when delivering cooling air to the cabinet 1, it drives the pump air component to operate and injects air into the back-blowing orifice plate 19. Since the filter element 5 is in a rotating motion state, the airflow discharged from the back-blowing orifice plate 19 can back-blow the filter element 5, causing the dust generated by the filtration to separate from the filter element 5, thereby achieving the effect of automatic dust removal and blockage clearing, ensuring smooth air intake, and extending the service life of the filter element 5.

[0031] In this embodiment, a sensing plate 31 is rotatably installed in the air intake chamber 9, and a transmission mechanism is provided in the air intake pipe 6. When the sensing plate 31 senses the change of airflow in the air intake chamber 9, the sensing plate 31 swings and triggers the pump air component through the transmission mechanism, so that the pump air component injects air into the back-blowing orifice plate 19.

[0032] refer to Figure 5 The pump air assembly includes a cylinder sleeve 15, a piston 16, an air outlet pipe 17 and a valve 18. The cylinder sleeve 15 is fixedly installed in the clean chamber 10, and the piston 16 is slidably installed in the cylinder sleeve 15. An air inlet hole is provided on the surface of the piston 16, and a one-way valve is provided in the middle of the air inlet hole. Under the action of the one-way valve, external air can only enter the middle of the cylinder sleeve 15 from the clean chamber 10. The air outlet pipe 17 is connected with the air outlet hole of the cylinder sleeve 15. The valve 18 is installed on the air outlet pipe 17. A connecting rod 20 is provided between the valve 18 and the piston 16. One end of the connecting rod 20 is rotatably connected to the switch knob of the valve 18, and the other end is transmission-connected to the piston 16. When the piston 16 moves close to the inner side of the cylinder sleeve 15, the piston 16 will drive the switch knob of the valve 18 to open through the connecting rod 20.

[0033] Among them, the driving assembly also includes a first gear 27, a second gear 28, a reciprocating screw 29 and a threaded seat 30. The first gear 27 is arranged in the cleaning chamber 10 and fixedly mounted on the rotating shaft of the bracket 11. The reciprocating screw 29 is rotatably mounted in the cleaning chamber 10, and the second gear 28 is fixedly mounted on the surface of the reciprocating screw 29. At the same time, the first gear 27 can be engaged with the second gear 28. The threaded seat 30 is threadedly mounted on the surface of the reciprocating screw 29, and the lower end of the threaded seat 30 is fixedly connected to the piston 16. The end of the connecting rod 20 is rotatably connected to the lower end of the threaded seat 30, and the connecting rod 20 is transmitted to the piston 16 through the threaded seat 30.

[0034] The transmission mechanism includes a sliding sleeve 32, a first spring 33 and a second spring 34. The sliding sleeve 32 is fixedly installed in the cleaning chamber 10. The reciprocating lead screw 29 can slide reciprocally along its axis, and one end of the reciprocating lead screw 29 is slidably inserted into the sliding sleeve 32, and the other end passes through the partition plate 8 and extends into the air inlet chamber 9 and contacts the induction plate 31. Both the first spring 33 and the second spring 34 are compression springs. The first spring 33 is installed between the inner end of the sliding sleeve 32 and the end of the reciprocating lead screw 29, and the second spring 34 is installed between the induction plate 31 and the bearing of the rotating shaft of the fan blade 7. When the wind speed in the air inlet pipe 6 decreases, the second spring 34 can push the induction plate 31 to rotate, drive the reciprocating lead screw 29 to slide through the induction plate 31, and make the first gear 27 mesh with the second gear 28.

[0035] As Figure 5 shown, under normal conditions, the air flow in the air inlet pipe 6 is large, the air flow pushes the induction plate 31 to flip, the induction plate 31 compresses the second spring 34, and the induction plate 31 is separated from the end of the reciprocating lead screw 29. Under the action of the first spring 33, the first gear 27 and the second gear 28 are in a staggered and separated state, so that the piston 16 stops moving, reducing the rotational resistance of the bracket 11 and the filter element 5. Among them, the influence of the induction plate 31 by air flow turbulence can be seen in the reference: Wu Zhicheng. Experimental research on the influence of air flow turbulence on the aerodynamic characteristics of dish-shaped paraboloids [J]. Journal of Nanjing University of Aeronautics and Astronautics, 1990, (03): 119-123.

[0036] By setting the induction plate 31 and the transmission component, during the use process, when the dust on the surface of the filter element 5 accumulates too much and affects the air intake volume of the air intake component, the wind speed in the air inlet pipe 6 will decrease, thereby triggering the action of the induction plate 31. The induction plate 31 pushes the reciprocating lead screw 29 to move to make the second gear 28 mesh with the first gear 27. At this time, the rotating shaft of the bracket 11 that drives the filter element 5 to rotate will synchronously drive the reciprocating lead screw 29 to move, and then drive the piston 16 to move to generate high-pressure air in the cylinder sleeve 15. And when the piston 16 moves close to the inner end of the cylinder sleeve 15, it will also synchronously open the valve 18 connected to the air outlet pipe 17 at the air outlet end of the cylinder sleeve 15, so that the high-pressure air inside the cylinder sleeve 15 is quickly released to blow the filter element 5 back and achieve automatic start-stop control of the back-blowing function, ensuring the stable and reliable operation of the equipment. Among them, the back-blowing principle can be seen in the reference: Wang Zhanyong, Li Qingjun, Li Yingqiu. Back-blowing design of the filter element recovery system [J]. Modern Paint & Finishing, 2012, 15(07): 46-47.

[0037] Working principle: First, start the motor 21. The motor 21 will drive the fan blade 7 to rotate through the first pulley 23 and the first belt 24. After the fan blade 7 rotates, it will suck external air from the air inlet 2 into the intake cavity 9 of the intake pipe 6, and then send it into the dehumidifier 4. After that, the moisture is removed by the dehumidifier 4 and sent into the cabinet 1, and finally discharged from the air outlet 3, realizing the heat dissipation inside the cabinet 1.

[0038] During the whole working process, the dehumidifier 4 can effectively remove the moisture in the air, so as to keep the inside of the cabinet 1 dry, and then ensure insulation, enabling the entire ring main unit to operate in a relatively humid environment, greatly improving its application range.

[0039] At the same time, during use, since a filter element 5 is installed at the air inlet 2, it can intercept the dust in the air entering the cabinet 1, thus ensuring the cleanliness inside the cabinet 1, avoiding electrical failures caused by dust, and making the entire ring main unit safer to use.

[0040] In addition, during use, when the motor 21 is running, it will also drive the reducer 22 to run. The reducer 22 will drive the bracket 11 to rotate through the second pulley 25 and the second belt 26. The rotation of the bracket 11 will synchronously drive the filter element 5 to rotate, thus realizing the switching of the filter element 5 at the corresponding position between the cleaning cavity 10 and the intake cavity 9, ensuring that enough air volume enters the intake pipe 6.

[0041] As time accumulates, when too much dust is intercepted on the filter element 5, it will cause a reduction in the intake air volume inside the intake pipe 6, thereby reducing the wind speed inside the intake pipe 6. At this time, under the action of the second spring 34, the induction plate 31 will push the reciprocating screw rod 29 to slide towards the cleaning cavity 10 until the first gear 27 meshes with the second gear 28. Then, the rotating shaft of the bracket 11 will drive the reciprocating screw rod 29 to rotate through the first gear 27 and the second gear 28. The reciprocating screw rod 29 will drive the threaded seat 30 to move reciprocally, and then drive the piston 16 to move reciprocally. Among them, when the piston 16 moves towards the middle of the cylinder sleeve 15, it will compress the air inside the cylinder sleeve 15 to increase its pressure. When the piston 16 is close to the inner side surface of the cylinder sleeve 15, the piston 16 will drive the switch knob of the valve 18 to open through the connecting rod 20. At this time, the high-pressure air inside the cylinder sleeve 15 will quickly pass through the outlet pipe 17 and blow the part of the filter element 5 corresponding to the cleaning cavity 10 through the back-blowing orifice plate 19, thus realizing the function of back-blowing and cleaning when the filter element 5 is blocked.

[0042] In summary, during the entire usage process, under the action of the air intake assembly and the dehumidifier 4, it can effectively ensure that the air entering the inside of the switchgear cabinet is dry. At the same time, during the usage process, the filtering assembly will also filter the air entering the switchgear cabinet, thereby intercepting the dust in the air. As the filter element 5 gradually becomes blocked and reaches a certain degree of blockage, the back-blowing function is automatically activated for back-blowing and blockage clearing to ensure the air permeability of the filter element 5, so that the entire ring main unit can be applicable to more different usage scenarios and effectively improve the applicable range.

[0043] Finally, it should be noted that: in the attached drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved, and other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other; The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An air-insulated ring main unit, characterized in that, include: A cabinet body (1), wherein two opposite sides of the cabinet body (1) are respectively provided with an air inlet (2) and an air outlet (3), and the air outlet (3) and the air inlet (2) are arranged at different heights; An air intake component, the air intake component being in communication with the air inlet (2), and the air intake component introducing low-temperature air into the interior of the cabinet (1) through the air inlet (2); A dehumidifier (4), wherein the dehumidifier (4) is fixedly installed in the cabinet (1), and the dehumidifier (4) is connected to the air outlet end of the air inlet component; A filter assembly, the filter assembly comprising a filter element (5), the filter element (5) being rotatably mounted in the middle of the air inlet (2), and the air passing through the air inlet (2) is filtered by the filter element (5); A drive assembly is connected to the air intake assembly and drives the air intake assembly to operate and the filter element (5) to rotate.

2. The air-insulated ring main unit according to claim 1, characterized in that: The air intake assembly comprises an air intake pipe (6) and a fan blade (7); the air intake pipe (6) is connected between the air inlet (2) and the air inlet end of the dehumidifier (4); a partition plate (8) is installed in the middle of the air intake pipe (6); and the partition plate (8) divides the middle of the air intake pipe (6) into an air intake chamber (9) and a cleaning chamber (10); one end of the air intake chamber (9) is connected to the air inlet (2), and the other end is connected to the air inlet end of the dehumidifier (4); the fan blade (7) is rotatably installed in the middle of the air intake chamber (9), and the air suction surface of the fan blade (7) faces the air inlet (2).

3. The air-insulated ring main unit according to claim 2, characterized in that: A pump air assembly and a back-blowing orifice plate (19) are fixedly installed in the cleaning chamber (10); the inlet end of the back-blowing orifice plate (19) is in communication with the pump air assembly, and the outlet end of the back-blowing orifice plate (19) faces the filter element (5).

4. The air-insulated ring main unit according to claim 3, wherein: A sensing plate (31) is rotatably mounted in the air intake chamber (9), and a transmission mechanism is provided in the air intake pipe (6). When the sensing plate (31) senses changes in the air flow in the air intake chamber (9), the sensing plate (31) swings and triggers the air pump assembly to operate through the transmission mechanism, causing the air pump assembly to inject air into the backflush orifice plate (19).

5. An air-insulated ring main unit according to claim 4, characterized in that: The filter assembly comprises a bracket (11) and an end cover (12); the bracket (11) is rotatably mounted in the middle of the air inlet (2), and the rotating shaft of the bracket (11) passes through the rotating shaft of the fan blade (7); the filter element (5) is mounted in the middle of the bracket (11) and can rotate synchronously with the bracket (11), and the filter element (5) covers the air inlet (2); the end cover (12) is detachably clamped on the air inlet (2), and the filter element (5) is limited by the end cover (12).

6. The air-insulated ring main unit according to claim 5, characterized in that: The driving assembly comprises a motor (21), a first pulley (23), a first belt (24), a reducer (22), a second pulley (25) and a second belt (26); the motor (21) is fixedly mounted on the surface of the air intake pipe (6); the output shaft of the motor (21) and the rotating shaft of the fan blade (7) are driven via the first pulley (23) and the first belt (24); the reducer (22) is fixedly connected to the surface of the air intake pipe (6); the output shaft of the motor (21) and the input shaft of the reducer (22) are coaxially connected; the output shaft of the reducer (22) and the rotating shaft of the bracket (11) are driven via the second pulley (25) and the second belt (26).

7. The air-insulated ring main unit according to claim 6, characterized in that: The pump air component includes a cylinder liner (15), a piston (16), an air outlet pipe (17) and a valve (18). The cylinder liner (15) is fixedly installed in the cleaning chamber (10). The piston (16) is slidably installed in the cylinder liner (15). An air inlet hole is provided on the surface of the piston (16). A check valve is provided in the middle of the air inlet hole. Under the action of the check valve, external air can only enter the middle of the cylinder liner (15) from the cleaning chamber (10). The air outlet pipe (17) is communicated with the air outlet hole of the cylinder liner (15). The valve (18) is installed on the air outlet pipe (17). A connecting rod (20) is provided between the valve (18) and the piston (16). One end of the connecting rod (20) is rotatably connected to the switch knob of the valve (18), and the other end is drivingly connected to the piston (16). When the piston (16) moves close to the inner side surface of the cylinder liner (15), the piston (16) will drive the switch knob of the valve (18) to open through the connecting rod (20).

8. The air-insulated ring main unit according to claim 7, characterized in that: The driving component further includes a first gear (27), a second gear (28), a reciprocating lead screw (29) and a threaded seat (30). The first gear (27) is arranged in the cleaning chamber (10) and fixedly installed on the rotating shaft of the bracket (11). The reciprocating lead screw (29) is rotatably installed in the cleaning chamber (10). The second gear (28) is fixedly installed on the surface of the reciprocating lead screw (29). At the same time, the first gear (27) can be meshed with the second gear (28). The threaded seat (30) is threadedly installed on the surface of the reciprocating lead screw (29). The lower end of the threaded seat (30) is fixedly connected to the piston (16). The end of the connecting rod (20) is rotatably connected to the lower end of the threaded seat (30). The connecting rod (20) is drivingly connected to the piston (16) through the threaded seat (30).

9. The air-insulated ring main unit according to claim 8, characterized in that: The transmission mechanism includes a sliding sleeve (32), a first spring (33) and a second spring (34). The sliding sleeve (32) is fixedly installed in the cleaning chamber (10). The reciprocating lead screw (29) can reciprocate along its axis. One end of the reciprocating lead screw (29) is slidably inserted into the sliding sleeve (32), and the other end passes through the partition plate (8) and extends into the air inlet chamber (9) and contacts the induction plate (31). Both the first spring (33) and the second spring (34) are compression springs. The first spring (33) is installed between the inner end of the sliding sleeve (32) and the end of the reciprocating lead screw (29). The second spring (34) is installed between the induction plate (31) and the bearing of the rotating shaft of the fan blade (7). When the wind speed in the air inlet pipe (6) decreases, the second spring (34) can push the induction plate (31) to rotate, drive the reciprocating lead screw (29) to slide through the induction plate (31), and make the first gear (27) mesh with the second gear (28).

10. The air-insulated ring main unit according to claim 9, characterized in that: A window (13) is opened on the end cover (12), and the window (13) corresponds to the inlet position of the air inlet chamber (9). A dust discharge channel (14) is fixedly installed on the end cover (12), and the dust discharge channel (14) corresponds to the mouth position of the cleaning chamber (10). The dust blown off the filter element (5) can be discharged from the dust discharge channel (14).

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