Fresh air system for power distribution cabinet of transformer substation

Abstract

The invention relates to substation equipment, and discloses a fresh air system for a substation power distribution cabinet. The system comprises a fresh air mechanism, the fresh air mechanism comprises a fresh air handling unit, an air outlet and an air inlet (203) of the fresh air handling unit are connected with a hot air main pipe (1) and a cold air main pipe (2) respectively, and the hot air main pipe (1) and the cold air main pipe (2) are both connected with a plurality of hot air branch pipes (10) and cold air branch pipes (20) which are in one-to-one correspondence with the power distribution cabinets. And the hot air main pipe (1), the cold air main pipe (2), the hot air branch pipe (10) and the cold air branch pipe (20) form a circulating pipeline together. The multiple power distribution cabinets can be synchronously cooled in a circulating air recycling mode through the fresh air system, and the energy-saving effect and the cooling efficiency are good.

Description

Technical Field

[0001] The present invention relates to a substation equipment, and particularly to a fresh air system for a substation power distribution cabinet. Background Art

[0002] The substation power distribution cabinet is an important part of the power system, which is used to further distribute the electric energy on the substation bus to more specific electrical equipment or users. During the operation of the power distribution cabinet, when the current passes through the resistive elements in the power distribution cabinet and the internal equipment of the power distribution cabinet runs, the temperature inside the power distribution cabinet will be increased. Therefore, it is necessary to cool the inside of the power distribution cabinet.

[0003] Currently, the general methods for cooling the power distribution cabinet are to enlarge the area of the ventilation opening of the power distribution cabinet or install radiators, etc. The above methods are more suitable for a single power distribution cabinet. When multiple power distribution cabinets work simultaneously in a substation, how to achieve synchronous and effective cooling is a problem that needs to be solved. Summary of the Invention

[0004] Aiming at the problem of the need for cooling existing in the substation power distribution cabinet in the prior art, the present invention provides a fresh air system for a substation power distribution cabinet.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions: A fresh air system for a substation power distribution cabinet includes a fresh air mechanism. The fresh air mechanism includes a fresh air unit. The air outlet and air inlet of the fresh air unit are respectively connected to a hot air main pipe and a cold air main pipe. A plurality of hot air branch pipes and cold air branch pipes corresponding to the power distribution cabinets one by one are connected to the hot air main pipe and the cold air main pipe. The hot air main pipe, the cold air main pipe, the hot air branch pipes and the cold air branch pipes together form a circulation pipeline.

[0006] Preferably, the fresh air unit includes a processing system for processing the hot air entering the fresh air unit. The processing system includes a filtering module, a purification module, a temperature adjustment module and a humidity adjustment module. It also includes a collection module arranged at the power distribution cabinet for detecting the temperature and humidity of the power distribution cabinet, and a controller connected to both the processing system and the collection module. The controller controls the processing system to process according to the signals collected by the collection module. The settings of the controller and the collection module can ensure the precise regulation of the air volume, temperature, humidity, etc. of the air conveyed into the power distribution cabinet.

[0007] Preferably, the pipe orifice end of the hot air branch pipe is connected to the top of the power distribution cabinet, and the pipe orifice end of the cold air branch pipe is connected to the bottom of the power distribution cabinet.

[0008] Preferably, an air inlet mechanism is provided at the pipe orifice end where the cold air branch pipe is connected to the power distribution cabinet. The air inlet mechanism includes an air inlet pipe with a sealed upper end that extends into the power distribution cabinet from the center of the bottom of the power distribution cabinet. The upper end of the air inlet pipe extends to the bottom of the power distribution cabinet, and a plurality of extension pipes are connected to the side wall of the upper end of the air inlet pipe and are evenly arranged along the axial direction of the air inlet pipe. The length direction of the extension pipe is arranged along the radial direction of the air inlet pipe, one end of the extension pipe is communicated with the air inlet pipe, and the other end is sealed; an air inlet is provided on the upper side wall of the extension pipe. The setting of the air inlet mechanism can make the cold air evenly input at the bottom of the power distribution cabinet, ensuring the cooling effect and cooling efficiency.

[0009] Preferably, the extension pipe includes one or more connecting sub-pipes, and the plurality of connecting sub-pipes are connected in sequence. The air inlet is arranged on the upper side wall of the connecting sub-pipe; Connectors and sealing caps are also provided at both ends of the extension pipe. The connector is fixed on the side wall of the upper end of the air inlet pipe. The end of the connector away from the air inlet pipe is threadedly connected to the connecting sub-pipe, and the adjacent connecting sub-pipes are threadedly connected end to end. The sealing cap is threadedly connected to the end of the extension pipe away from the air inlet pipe. The extension pipe is designed to be spliced by multiple connecting sub-pipes, which can make it better suitable for the bottom space of the power distribution cabinet and ensure the uniform input of cold air at the bottom of the power distribution cabinet.

[0010] Preferably, threaded connection parts are provided at the end of the connector away from the air inlet pipe and the end of the connecting sub-pipe away from the connector. External threads are provided on the side wall of the threaded connection part. The end of the connecting sub-pipe away from the sealing cap constitutes a limiting part that docks with the threaded connection part on the connector or the adjacent connecting sub-pipe. A collar is rotatably connected at the limiting part, and internal threads that are threadedly connected to the threaded connection part are provided on the inner wall of the collar. The connection method of the connecting sub-pipe enables it to always keep the air inlet facing upward during threaded connection, ensuring the subsequent cooling efficiency of the cold air in the power distribution cabinet.

[0011] Preferably, the connecting sub-pipe includes a sub-pipe body, and the air inlet is arranged on the side wall of the sub-pipe body. A cover plate assembly that can cover the air inlet is also provided on the outer wall of the sub-pipe body. The cover plate assembly can be opened when the air inlet is in the air inlet state; The cover plate assembly includes two arc-shaped cover plates that can move relative to each other. The two arc-shaped cover plates can jointly cover the air inlet. A first arc-shaped block for connecting the two arc-shaped cover plates is also provided at both ends of the arc-shaped cover plate. Arc-shaped rods are provided on both sides of the first arc-shaped block. The end of the arc-shaped rod away from the first arc-shaped block is inserted into the arc-shaped cover plate and is in sliding fit with the arc-shaped cover plate. A return spring with one end abutted against the first arc-shaped block and the other end abutted against the arc-shaped cover plate is sleeved on the arc-shaped rod. The setting of the cover plate assembly can achieve the sealing of the air inlet when it is not in the working state, preventing foreign objects from falling into the air inlet and affecting the subsequent input of cold air.

[0012] It further includes an arc-shaped air guide plate connected to the inner wall of the arc-shaped cover plate and slidably engaged with the inner wall of the sub-tube. When the two arc-shaped cover plates are closed outside the air inlet under the action of the return spring, the two arc-shaped air guide plates abut against the inner side of the air inlet. The setting of the arc-shaped air guide plate enables the arc-shaped cover plate to be smoothly opened under the action of wind force.

[0013] Preferably, an air outlet mechanism is provided at the pipe orifice end where the hot air branch pipe is connected to the power distribution cabinet. The air outlet mechanism includes an air outlet pipe, and further includes an air outlet pipe mounting seat fixed on the top surface of the power distribution cabinet for mounting the air outlet pipe. A gas passage communicating with the inside of the power distribution cabinet and having a rectangular cross-section is formed in the middle of the air outlet pipe mounting seat. A water receiving groove with an upward opening is provided on the inner wall of the gas passage, and one of the inner side walls of the water receiving groove is flush with the inner side wall of the gas passage. The setting of the water receiving groove can effectively collect the water droplets condensed on the pipe wall of the air outlet pipe and prevent them from flowing back into the power distribution cabinet and affecting the electrical components inside the power distribution cabinet.

[0014] Preferably, a draw slide is horizontally arranged on the inner wall of the gas passage. At the draw slide, two relatively arranged U-shaped water receiving slide seats are provided. The two water receiving slide seats can move towards or away from each other within the draw slide and can be completely pulled out of the draw slide; the water receiving slide seats are provided with U-shaped grooves with upward openings. When the two water receiving slide seats are relatively tightened, the two U-shaped grooves together form the water receiving groove. The installation method of the water receiving slide seat can facilitate the cleaning of the water in the water receiving groove.

[0015] Preferably, an installation through groove communicating with the slot is provided on the upper side wall of the air outlet pipe mounting seat. In the installation through groove, there is a draw vibration plate that can move towards or away from the air outlet pipe within the installation through groove and a vibration spring for driving the draw vibration plate to move towards the slot. The draw vibration plate can strike the outer wall of the air outlet pipe under the action of the vibration spring. The setting of the draw vibration plate can quickly and preliminarily process the condensed beads on the pipe wall of the air outlet pipe and reduce the risk of them falling into the power distribution cabinet.

[0016] Due to the adoption of the above technical solutions, the present invention has remarkable technical effects: Through the fresh air system, the present invention can synchronously cool multiple power distribution cabinets by means of recycling circulating air, and has better energy-saving effects and cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic plan layout diagram of the fresh air system of the present invention.

[0018] Figure 2 It is Figure 1 The schematic structural diagram of the power distribution cabinet in

[0019] Figure 3 It is a flow chart of the fresh air system of the present invention.

[0020] Figure 4 It isFigure 1 Schematic diagram of the middle processing system.

[0021] Figure 5 It is an installation schematic diagram of the air outlet mechanism of the present invention on the power distribution cabinet.

[0022] Figure 6 It is Figure 5 The sectional view of

[0023] Figure 7 It is Figure 5 The exploded schematic diagram of the middle air inlet pipe mounting seat.

[0024] Figure 8 It is the sectional view of the air inlet pipe mounting seat.

[0025] Figure 9 It is the installation schematic diagram of the water receiving sliding seat.

[0026] Figure 10 It is Figure 9 The structural schematic diagram of the middle water receiving sliding seat.

[0027] Figure 11 It is the structural schematic diagram of the air inlet mechanism of the present invention.

[0028] Figure 12 Figure 11 The half-sectional schematic diagram of

[0029] Figure 13 It is Figure 11 The exploded schematic diagram of the middle extension pipe.

[0030] Figure 14 It is Figure 13 The sectional view of the middle connecting sub-pipe.

[0031] Figure 15 It is Figure 14 The structural schematic diagram of the middle sub-pipe body.

[0032] Figure 16 It is Figure 14 The structural schematic diagram of the middle cover plate assembly. Specific embodiments

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] Embodiment 1 A fresh air system for a substation power distribution cabinet, as Figures 1 - 4As shown in the figure, it includes a fresh air mechanism. The fresh air mechanism includes a fresh air unit. The air outlet and the air inlet 203 of the fresh air unit are respectively connected to a hot air main pipe 1 and a cold air main pipe 2. A plurality of hot air branch pipes 10 and cold air branch pipes 20 corresponding to the power distribution cabinets one by one are connected to the hot air main pipe 1 and the cold air main pipe 2. The hot air main pipe 1, the cold air main pipe 2, the hot air branch pipes 10 and the cold air branch pipes 20 together form a circulation pipeline.

[0035] The fresh air unit includes a processing system for processing the hot air entering the fresh air unit. The processing system includes a filtering module, a purification module, a temperature adjustment module and a humidity adjustment module. It also includes a collection module arranged at the power distribution cabinet for detecting the temperature and humidity of the power distribution cabinet, and a controller connected to both the processing system and the collection module. The controller controls the processing system to process according to the signals collected by the collection module.

[0036] In this embodiment, the pipe orifice end of the hot air branch pipe 10 is connected to the top of the power distribution cabinet, and the pipe orifice end of the cold air branch pipe 20 is connected to the bottom of the power distribution cabinet. During operation, the fresh air unit discharges cold air into the cold air main pipe 2. The cold air in the cold air main pipe 2 enters the bottom of the power distribution cabinet through the cold air branch pipe 20 connected to the bottom of the power distribution cabinet. The cold air branch pipe 20 is arranged with the opening upward. When introducing cold air into the power distribution cabinet, it will squeeze and lift the hot air inside the power distribution cabinet, thereby discharging the original heat inside the power distribution cabinet. At the same time, during the lifting process, it contacts the electrical components inside the power distribution cabinet to reduce the temperature of the electrical components. Finally, the hot air inside the power distribution cabinet is discharged when it runs to the hot air branch pipe 10.

[0037] The discharged hot air enters the internal processing system of the fresh air unit for recovery. After recovery, the hot air undergoes processes such as filtering, purification, temperature adjustment and humidity adjustment, and then becomes usable cold air again, which is distributed to multiple power distribution cabinets through the air inlet main pipe for circular reuse, so as to achieve synchronous cooling of multiple power distribution cabinets and has better cooling efficiency.

[0038] The fresh air unit in this embodiment is mainly composed of a fresh air valve, a filter, a surface heat exchanger, a humidifier, a blower, etc., and it can better control the outlet air temperature and humidity.

[0039] The supply air temperature control is achieved through a proportional-integral temperature controller. The controller detects the supply air temperature through a temperature sensor installed in the supply air duct and compares it with the set temperature. According to the comparison result, the controller will perform PI operation and send an on / off signal to the electric control valve to adjust the supply air temperature so that it remains within the required range.

[0040] The fresh air unit also has a surface heat exchanger for controlling the relative humidity. By adjusting the cooling and heating capacity of the surface heat exchanger, the humidity of the supply air can be controlled. When air passes through the surface cooler, the refrigerant exchanges heat with the air and absorbs the heat in the air, thereby reducing the air temperature and humidity. By adjusting the refrigerant flow rate and air flow rate, the humidity of the air can be further controlled to meet the environmental requirements.

[0041] In this embodiment, an air inlet mechanism is provided at the pipe orifice end where the cold air branch pipe 20 is connected to the distribution cabinet, and an air outlet mechanism is provided at the pipe orifice end where the hot air branch pipe 10 is connected to the distribution cabinet.

[0042] As Figures 11 - 16 shown, the air inlet mechanism includes an air inlet pipe 201 with a sealed upper end that extends into the distribution cabinet from the center of the bottom of the distribution cabinet. The upper end of the air inlet pipe 201 extends to the bottom of the distribution cabinet, and a plurality of extension pipes 202 are connected to the side wall of the upper end of the air inlet pipe 201 and are evenly arranged along the axial direction of the air inlet pipe 201. The length direction of the extension pipe 202 is arranged along the radial direction of the air inlet pipe 201, and one end of the extension pipe 202 is communicated with the air inlet pipe 201 and the other end is sealed; an air inlet 203 is provided on the upper side wall of the extension pipe 202.

[0043] By uniformly arranging a plurality of extension pipes 202 with air inlets 203 on the air inlet pipe 201, the cold air can be evenly distributed at the bottom of the distribution cabinet during transmission, ensuring the uniform distribution of cold air at the same height in the distribution cabinet and avoiding uneven heating and cooling in the distribution cabinet, which affects the overall cooling effect of the distribution cabinet.

[0044] Considering the installation position and the space at the bottom of the distribution cabinet, the extension pipe 202 is designed to be connected with a single sub-pipe 204 or spliced by multiple sub-pipes 204. That is, the extension pipe 202 includes one or more connecting sub-pipes 204, and the multiple connecting sub-pipes 204 are connected in sequence. The air inlet 203 is provided on the upper side wall of the connecting sub-pipe 204.

[0045] During installation, the extension parts can be laid according to the space layout at the bottom of the distribution cabinet to ensure the uniform distribution of cold air at the bottom of the distribution cabinet and facilitate the staff to adjust according to the actual situation.

[0046] The structure of the extension pipe 202 is as follows: connecting heads 205 and sealing caps 206 are also provided at both ends of the extension pipe 202. The connecting head 205 is fixed on the side wall of the upper end of the air inlet pipe 201. The end of the connecting head 205 away from the air inlet pipe 201 is threadedly connected to the connecting sub-pipe 204, and the adjacent connecting sub-pipes 204 are threadedly connected end to end. The sealing cap 206 is threadedly connected to the end of the extension pipe 202 away from the air inlet pipe 201.

[0047] The end of the connector 205 away from the air inlet pipe 201 and the end of the connecting sub-pipe 204 away from the connector 205 are both provided with threaded connection parts 207. External threads are provided on the side walls of the threaded connection parts 207. The end of the connecting sub-pipe 204 away from the sealing cover 206 constitutes a limiting part 208 that docks with the threaded connection part 207 on the connector 205 or an adjacent connecting sub-pipe 204. An annular groove 221 is provided at the limiting part 208. A collar 209 is rotatably connected in the annular groove 221. Internal threads that are threadedly connected to the threaded connection part 207 are provided on the inner wall of the collar 209. The connecting sub-pipe 204 includes a sub-pipe body 210. The air inlet 203 is provided on the side wall of the sub-pipe body 210.

[0048] Positioning grooves 217 are provided on the end faces of the connector 205 away from the air inlet pipe 201 and on the end faces of the connecting sub-pipe 204 away from the connector 205. A positioning block 218 that can be inserted into the positioning groove 217 is provided on the end face of the connecting sub-pipe 204 away from the sealing cover 206.

[0049] Multiple connecting sub-pipes 204 in the extension pipe 202 are threadedly connected, and both connection and disassembly are very convenient. At the same time, the collar 209 is designed to realize the connection between the connecting sub-pipes 204 through the collar 209. This connection method can avoid rotating the sub-pipe body 210 during threaded connection, so as to ensure that the air inlet 203 on the sub-pipe body 210 is always in an upward state, ensure that the cold air direction is upward, and improve the cooling effect.

[0050] Since the air inlet 203 is arranged upward, in order to prevent small components inside the power distribution cabinet from falling into the air inlet 203 and affecting the subsequent operation of the fresh air system, such as small electrical components to be replaced equipped by the staff during maintenance or loose electrical components in the power distribution cabinet, etc., a cover plate assembly 211 is also provided on the outer wall of the sub-pipe body 210 and can cover the air inlet 203. When the air inlet 203 is in the air inlet state, the cover plate assembly 211 can be opened. When the air inlet 203 is in the non-working state, the cover plate assembly 211 closes the air inlet 203. During maintenance, the air inlet 203 is in the non-working state. At this time, the cover plate assembly 211 closes the air inlet 203, and the electrical components to be replaced will not fall into the air inlet 203; when the air inlet 203 is in the working state, there will be wind with a certain wind pressure blowing out at the air inlet 203, and the loose and fallen electrical components are not likely to fall into the air inlet 203 either.

[0051] Specifically, the cover plate assembly 211 includes two arc-shaped cover plates 212 capable of relative movement. The two arc-shaped cover plates 212 can jointly cover the air inlet 203. It also includes first arc-shaped blocks 213 arranged at both ends of the arc-shaped cover plates 212 and used to connect the two arc-shaped cover plates 212. Arc-shaped rods 214 are provided on both sides of the first arc-shaped blocks 213. The ends of the arc-shaped rods 214 far from the first arc-shaped blocks 213 are inserted into the arc-shaped cover plates 212 and are in sliding fit with the arc-shaped cover plates 212. A return spring 215 is sleeved on the arc-shaped rods 214, with one end abutted against the first arc-shaped block 213 and the other end abutted against the arc-shaped cover plate 212. It further includes arc-shaped air guide plates 216 connected to the inner walls of the arc-shaped cover plates 212 and in sliding fit with the inner walls of the sub-tube body 210. When the two arc-shaped cover plates 212 cover the outside of the air inlet 203 under the action of the return spring 215, the two arc-shaped air guide plates 216 abut against the inside of the air inlet 203.

[0052] Annular grooves 219 are provided at both ends of the sub-tube body 210. Second arc-shaped blocks 220 are provided at both ends of the arc-shaped cover plates 212. The first arc-shaped blocks 213 and the second arc-shaped blocks 220 are both slidably arranged in the annular grooves 219 and can rotate around the axis of the sub-tube body 210 along the annular grooves 219.

[0053] During the intake process of the cold air branch pipe 20, the cold air enters each extension pipe 202 through the intake pipe 201. As the air pressure in the extension pipes 202 increases, the air pressure acts on the arc-shaped air guide plates 216, causing the arc-shaped air guide plates 216 to move backward, overcoming the elastic force of the return spring 215 and opening the arc-shaped cover plates 212. In order to ensure that the air pressure can smoothly drive the movement of the arc-shaped air guide plates 216, an air guide groove 222 can be formed by recessing the lower part of the abutting end faces of the two arc-shaped air guide plates 216. When the cold air stops entering, under the action of the return spring 215, the arc-shaped cover plates 212 move towards each other and cover the air inlet 203.

[0054] As Figures 5 - 10 shown, the air outlet mechanism includes an air outlet pipe 101. It also includes an air outlet pipe mounting seat 102 fixed on the top surface of the power distribution cabinet for mounting the air outlet pipe 101. An air passage 103 that is connected to the inside of the power distribution cabinet and has a rectangular cross-section is formed in the middle of the air outlet pipe mounting seat 102. A water receiving groove 104 with an upward opening is provided on the inner wall of the air passage 103. One of the inner side walls of the water receiving groove 104 is flush with the inner side wall of the air passage 103.

[0055] The setting of the water receiving groove 104 can effectively catch the water droplets condensed on the pipe wall of the air outlet pipe 101, preventing the water droplets condensed on the inner wall of the air outlet pipe 101 from falling back into the power distribution cabinet and affecting the electrical components inside the power distribution cabinet.

[0056] In order to facilitate timely cleaning of the water in the docking water tank 104, it is designed to be a structure that can be separated and pulled out from the air outlet pipe mounting seat 102. Specifically, a pull-out slide 105 is horizontally arranged on the inner wall of the air passage 103, and two oppositely arranged and U-shaped water receiving slide seats 106 are arranged at the pull-out slide 105. The two water receiving slide seats 106 can move toward or away from each other in the pull-out slide and can be completely pulled out of the pull-out slide 105. The water receiving slide seat 106 is designed to be U-shaped, which can avoid blocking the air outlet at the top of the power distribution cabinet and ensure that hot air can enter the air passage 103 from the top of the power distribution cabinet and be discharged; the water receiving slide seat 106 is provided with a U-shaped groove 107 with an opening upward, and the two U-shaped grooves 107 together constitute the water receiving tank 104, that is, the water receiving tank 104 is divided into two sections, each of which is composed of two U-shaped grooves 107.

[0057] In order to improve the stability when the two water receiving slides 106 abut against each other, magnets 112 that can attract each other are provided on the opposite sides of the two water receiving slides 106, and a sealing gasket is provided at the connection between the water receiving slide 106 and the air outlet pipe mounting seat 102. When the water receiving slides 106 abut against each other, the inner side of the outer end surface of the water receiving slide 106 presses the sealing gasket against the outer surface of the air outlet pipe mounting seat 102 to ensure the sealing of the pulling slide 105 of the water receiving slide 106 in this state.

[0058] In addition, a slot 109 is provided at the upper end of the air outlet duct mounting seat 102 for the end of the air outlet duct 101 to be inserted into. The end of the air outlet duct 101 and the slot 109 have an interference fit, which can ensure the stability and sealing of the connection between the two. An inclined transition water guide surface 113 is provided between the inner wall of the air outlet duct 101 and the inner wall of the air outlet duct mounting seat 102.

[0059] During operation, water droplets condensed on the wall of the air outlet pipe 101 flow into the U-shaped groove 107 through the water guide surface 113. When the water in the water tank 104 needs to be cleaned, the magnetic force of the magnet 112 is overcome, and the water receiving slide seat 106 is pulled out to separate it from the pull-out slide 105. In order to facilitate the operation of the water receiving slide seat 106, a handle is also provided on the outer surface of the water receiving slide seat 106.

[0060] In order to ensure that the water droplets condensed on the wall of the air outlet pipe 101 will not fall into the power distribution cabinet during the removal and cleaning process of the water receiving slide 106, the condensed water on the wall of the water outlet pipe can be manually shaken off to accelerate its falling into the water receiving tank 104, that is, a vibration mechanism is set to knock the wall of the air outlet pipe 101 so that the condensed water that has not fallen off can be shaken off into the water receiving tank 104. The specific vibration mechanism is as follows: On the upper side wall of the air outlet pipe mounting seat 102, there is an installation through groove 108 communicating with the slot 109. Inside the installation through groove 108, there is a pull-and-vibrate plate 110 that can move towards or away from the air outlet pipe 101 within the installation through groove 108, and a vibration spring 111 for driving the pull-and-vibrate plate 110 to move towards the slot 109. The pull-and-vibrate plate 110 can strike the outer wall of the air outlet pipe 101 under the action of the vibration spring 111. And for the convenience of operating the pull-and-vibrate plate 110, a handle hole is provided on the outer side wall of the pull-and-vibrate plate 110.

[0061] Among them, guide post installation grooves 114 extend on both sides of the installation through groove 108. Inside the guide post installation grooves 114, guide posts 115 with an axial direction along the movement direction of the pull-and-vibrate plate 110 are installed. The vibration spring 111 is sleeved on the guide posts 115. Connection ears 116 that are slidably sleeved on the guide posts 115 are provided on both sides of the pull-and-vibrate plate 110. On the end face of the pull-and-vibrate plate 110 facing the air outlet pipe 101, there is a first shock pad 117, which can reduce vibration damage.

[0062] During the operation process, the pull-and-vibrate plate 110 is pulled out of the installation through groove 108 through the handle hole. During the pulling-out process, the vibration spring 111 is compressed. After pulling out a certain distance, the pull-and-vibrate plate 110 is released. At this time, the pull-and-vibrate plate 110 will quickly move towards the air outlet pipe 101 under the action of the vibration spring 111 and strike the outer wall of the air outlet pipe 101, so that the water droplets on the inner wall of the air outlet pipe 101 are shaken off and fall into the water receiving tank 104, and then the water receiving tank 104 can be cleaned.

[0063] In this embodiment, for the convenience of installing and disassembling the air outlet pipe mounting seat 102 on the top of the power distribution cabinet, the air outlet pipe mounting seat 102 includes a rectangular main seat 118. An air passage 103 is formed in the middle of the rectangular main seat 118. It also includes a connecting plate 119 fixed to the top surface of the power distribution cabinet by bolts. On the outer wall of the rectangular main seat 118, there is a connecting seat 121 with a limit hole 123 formed in the middle. On the connecting plate 119, a connecting cover plate 120 with an L-shaped cross-section is connected by bolts. On the lower surface of the inner side of the connecting cover plate 120, there is a limit seat 122. The connecting seat 121 is installed on the limit seat 122 through the limit hole 123 and fixed between the connecting plate 119 and the connecting cover plate 120.

[0064] In order to reduce the impact on connection stability caused by the vibration of the pull-push vibrating plate 110, a second shock pad 124 is provided on the upper end surface of the connection plate 119, and the connection seat 121 is pressed against the second shock pad 124 through the connection cover plate 120. In addition, a third shock pad 126 is provided on the lower end surface of the connection cover plate 120. The third shock pad 126 includes a protruding portion 125 that wraps the limit seat 122. When the limit seat 122 is inserted into the connection seat 121, the protruding portion 125 is located between the hole wall of the limit block and the outer wall of the limit seat 122. In order to prevent vibration from being transmitted to the power distribution cabinet, a fourth shock pad can also be provided between the bottom of the rectangular main seat 118 and the top surface of the power distribution cabinet.

[0065] When installing the air outlet pipe mounting seat 102, first fix the connection plate 119 on the top of the power distribution cabinet to prepare for positioning the air outlet pipe 101, and then press the rectangular main seat 118 against the top of the power distribution cabinet through the connection cover plate 120. Compared with the integral air outlet pipe mounting seat 102 directly fixed on the top of the power distribution cabinet by bolts, this split-type air outlet pipe mounting seat 102 is less likely to be loose in assembly with the power distribution cabinet under vibration conditions. In addition, multiple shock absorbers are provided at the connection to further reduce the bolt loosening caused by vibration.

[0066] At the same time, in this embodiment, in order to ensure the connection stability between the air outlet pipe 101 and the hot air branch pipe 10, a telescopic pipe with elasticity and allowing air flow is installed at the connection between the air outlet pipe 101 and the hot air branch pipe 10, which can not only ensure air circulation but also prevent the vibration of the air outlet pipe 101 from being transmitted to the hot air branch pipe 10.

[0067] It is easy to understand that those skilled in the art can combine, split, recombine, etc. the embodiments of the present application based on one or several embodiments provided by the present application to obtain other embodiments, and these embodiments do not exceed the protection scope of the present application.

[0068] In summary, the above are only the preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope covered by the patent of the present invention.

Claims

1. A fresh air system for a substation power distribution cabinet, characterized in that: It includes a fresh air mechanism, and the fresh air mechanism includes a fresh air unit. The air outlet and air inlet (203) of the fresh air unit are respectively connected to a hot air main pipe (1) and a cold air main pipe (2). A plurality of hot air branch pipes (10) and cold air branch pipes (20) corresponding to the distribution cabinets one by one are connected to the hot air main pipe (1) and the cold air main pipe (2). The hot air main pipe (1), the cold air main pipe (2), the hot air branch pipes (10) and the cold air branch pipes (20) together form a circulation pipeline.

2. The fresh air system for a substation power distribution cabinet according to claim 1, wherein: The fresh air unit includes a processing system for processing the hot air entering the fresh air unit. The processing system includes a filter module, a purification module, a temperature adjustment module and a humidity adjustment module. It also includes a collection module arranged at the distribution cabinet for detecting the temperature and humidity of the distribution cabinet, and a controller connected to both the processing system and the collection module. The controller controls the processing system to process according to the signals collected by the collection module.

3. The fresh air system for a substation power distribution cabinet according to claim 1, characterized in that: The pipe orifice end of the hot air branch pipe (10) is connected to the top of the distribution cabinet, and the pipe orifice end of the cold air branch pipe (20) is connected to the bottom of the distribution cabinet.

4. The fresh air system for a substation power distribution cabinet according to claim 3, wherein: An air inlet mechanism is provided at the pipe orifice end of the cold air branch pipe (20) connected to the distribution cabinet. The air inlet mechanism includes an air inlet pipe (201) with a sealed upper end and extending from the center of the bottom of the distribution cabinet into the distribution cabinet. The upper end of the air inlet pipe (201) extends to the bottom of the distribution cabinet, and a plurality of extension pipes (202) are connected to the side wall of the upper end of the air inlet pipe (201) and are uniformly arranged along the axial direction of the air inlet pipe (201). The length direction of the extension pipe (202) is arranged along the radial direction of the air inlet pipe (201), and one end of the extension pipe (202) is communicated with the air inlet pipe (201), and the other end is sealed. An air inlet (203) is provided on the upper side wall of the extension pipe (202).

5. The fresh air system for a substation power distribution cabinet according to claim 4, wherein: The extension pipe (202) includes one or more connecting sub-pipes (204), and the multiple connecting sub-pipes (204) are connected in sequence. The air inlet (203) is arranged on the upper side wall of the connecting sub-pipe (204). Connection heads (205) and sealing caps (206) are also provided at both ends of the extension pipe (202). The connection head (205) is fixed on the side wall of the upper end of the air inlet pipe (201). The end of the connection head (205) away from the air inlet pipe (201) is threadedly connected to the connecting sub-pipe (204). The head and tail of adjacent connecting sub-pipes (204) are threadedly connected. The sealing cap (206) is threadedly connected to the end of the extension pipe (202) away from the air inlet pipe (201).

6. The fresh air system for a substation power distribution cabinet according to claim 5, wherein: Threaded connection parts (207) are provided at the end of the connection head (205) away from the air inlet pipe (201) and the end of the connecting sub-pipe (204) away from the connection head (205). External threads are provided on the side wall of the threaded connection part (207). The end of the connecting sub-pipe (204) away from the sealing cap (206) forms a limiting part (208) for butting against the threaded connection part (207) on the connection head (205) or an adjacent connecting sub-pipe (204). A collar (209) is rotatably connected at the limiting part (208), and internal threads for threadedly connecting with the threaded connection part (207) are provided on the inner wall of the collar (209).

7. The fresh air system for a substation power distribution cabinet according to claim 5, wherein: The connecting sub-tube (204) includes a sub-tube body (210). The air inlet (203) is arranged on the side wall of the sub-tube body (210). It further includes a cover plate assembly (211) arranged on the outer wall of the sub-tube body (210) and capable of covering the air inlet (203). When the air inlet (203) is in the air inlet state, the cover plate assembly (211) can be opened; The cover plate assembly (211) includes two arc-shaped cover plates (212) capable of relative movement. The two arc-shaped cover plates (212) can jointly cover the air inlet (203). It further includes first arc-shaped blocks (213) arranged at both ends of the arc-shaped cover plates (212) and used for connecting the two arc-shaped cover plates (212). Arc-shaped rods (214) are arranged on both sides of the first arc-shaped blocks (213). The end of the arc-shaped rod (214) far from the first arc-shaped block (213) is inserted into the arc-shaped cover plate (212) and is in sliding fit with the arc-shaped cover plate (212). A return spring (215) with one end abutted against the first arc-shaped block (213) and the other end abutted against the arc-shaped cover plate (212) is sleeved on the arc-shaped rod (214). It further includes arc-shaped air guide plates (216) connected to the inner walls of the arc-shaped cover plates (212) and in sliding fit with the inner wall of the sub-tube body (210). When the two arc-shaped cover plates (212) cover the outside of the air inlet (203) under the action of the return spring (215), the two arc-shaped air guide plates (216) abut against the inside of the air inlet (203).

8. The fresh air system for a substation power distribution cabinet according to claim 3, wherein: The pipe orifice end where the hot air branch pipe (10) is connected to the power distribution cabinet is provided with an air outlet mechanism. The air outlet mechanism includes an air outlet pipe (101). It further includes an air outlet pipe mounting seat (102) fixed on the top surface of the power distribution cabinet for mounting the air outlet pipe (101). An air passage (103) communicating with the inside of the power distribution cabinet is formed in the middle of the air outlet pipe mounting seat (102). A water receiving groove (104) with an upward opening is arranged on the inner wall of the air passage (103). One of the inner side walls of the water receiving groove (104) is flush with the inner side wall of the air passage (103).

9. The fresh air system for a substation power distribution cabinet according to claim 8, characterized in that: A draw slideway (105) is horizontally arranged on the inner wall of the air passage (103). Two relatively arranged U-shaped water receiving sliding seats (106) are arranged at the draw slideway (105). The two water receiving sliding seats (106) can move towards or away from each other within the draw slideway and can be completely pulled out of the draw slideway (105); The water receiving sliding seat (106) is provided with a U-shaped groove (107) with an upward opening. The two U-shaped grooves (107) jointly form the water receiving groove (104).

10. The fresh air system for a substation power distribution cabinet according to claim 8, wherein: The upper end of the air outlet pipe mounting seat (102) is provided with a slot (109) for the end of the air outlet pipe (101) to be inserted. An installation through groove (108) communicating with the slot (109) is arranged on the side wall at the upper end of the air outlet pipe mounting seat (102). A draw vibration plate (110) capable of moving towards or away from the air outlet pipe (101) within the installation through groove (108) and a vibration spring (111) for driving the draw vibration plate (110) to move towards the slot (109) are arranged in the installation through groove (108). The draw vibration plate (110) can strike the outer wall of the air outlet pipe (101) under the action of the vibration spring (111).

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