Compressed air self-cleaning filter device and backflushing method

Abstract

The present application relates to the technical field of filtering device, disclose compressed air self-cleaning filter equipment and blowback method, including, filter unit, the filter unit includes filter screen;Blowback unit, the blowback unit includes main blowback mechanism and vice blowback mechanism, the main blowback mechanism utilizes compressor finished gas to carry out blowback to filter screen, the vice blowback mechanism includes gas holder and inflation pump, the vice blowback mechanism carries out blowback to filter screen through the gas stored in gas holder;Adjusting unit, the adjusting unit includes control valve and sealing plate, the adjusting unit further includes transmission mechanism, the working state of control valve is changed through transmission mechanism when the sealing plate rotates.The present application carries out blowback to filter screen through the setting vice blowback mechanism, when the compressed air introduced by main blowback mechanism is insufficient, switch vice blowback mechanism, utilize the high pressure gas in gas holder to carry out blowback to filter screen, avoid the situation that the cleaning effect is not good caused by insufficient air pressure.

Description

Technical Field

[0001] This invention belongs to the field of filtration device technology, specifically, it relates to a self-cleaning compressed air filtration device and a backflushing method. Background Technology

[0002] Self-cleaning compressed air filters are widely used in industrial production to purify the air entering air compressors. Their working principle involves periodically cleaning the filter element with backflushing gas to maintain filtration efficiency and equipment operational stability. However, existing self-cleaning compressed air filters typically extract backflushing gas from the finished air output of the downstream air compressor, requiring a backflushing gas pressure of at least 0.4 MPa. When the air compressor's exhaust pressure is below 0.4 MPa, insufficient backflushing gas pressure leads to the following problems: 1. Reduced filter element cleaning effect, affecting filtration efficiency; 2. Insufficient backflushing gas pressure, making filter element cleaning impossible; 3. Long-term use may cause filter element clogging, increasing maintenance costs and reducing equipment lifespan. To solve these problems, there is an urgent need to design a self-cleaning filter system that can adapt to air compressors with low exhaust pressure.

[0003] Chinese patent CN201565222U discloses a self-cleaning device for air filters. During the interval when the compressor is not working or when the compressor stops working, the air input to the filter ends stops, and the remaining compressed air in the pipeline or air tank is introduced to backflush the filter. This method is most effective at removing various particles and dust from the air filter without affecting the stable output of compressed air.

[0004] However, this technical solution still has at least the following drawbacks: the above solution relies solely on compressed air from the remaining pipeline or air tank for backflushing. Although this can compensate for insufficient backflushing air pressure, it does not have the function of vibrating the filter to assist in cleaning during backflushing, and the cleaning effect needs to be improved. In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a self-cleaning compressed air filtration device and a backflushing method. A secondary backflushing mechanism is set up to backflush the filter screen. When the compressed air introduced by the main backflushing mechanism is insufficient, the secondary backflushing mechanism is switched to use high-pressure gas in the air tank to backflush the filter screen, avoiding poor cleaning effect caused by insufficient air pressure. Two sets of filter screens are used for filtration. When the air compressor is working, the working state of the two sets of filter screens is switched to ensure that one set of filter screens is still working normally during backflushing cleaning. Furthermore, when both sets of filter screens are being backflushed, the air delivery volume of the connecting pipe is automatically adjusted to accommodate an increase in the number of filter screens.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] Compressed air self-cleaning filtration equipment includes:

[0008] Filtering unit, the filtering unit including a filter screen;

[0009] The backflush unit includes a main backflush mechanism and a secondary backflush mechanism. The main backflush mechanism uses the finished gas from the compressor to backflush the filter screen. The secondary backflush mechanism includes a gas storage tank and an air pump. The secondary backflush mechanism uses the gas stored in the gas storage tank to backflush the filter screen.

[0010] The regulating unit includes a control valve and a sealing plate, and also includes a transmission mechanism. When the sealing plate rotates, the operating state of the control valve is changed through the transmission mechanism.

[0011] In a preferred embodiment of the present invention, the filter unit further includes a corrugated tube installed on top of the filter screen, a venturi tube installed on top of the corrugated tube, and an air inlet pipe installed on top of the venturi tube.

[0012] The backflush unit also includes a conveying mechanism, which includes a backflush pipe. One end of the backflush pipe extends into the air inlet pipe. The control valve is installed on the backflush pipe. A diverter pipe is installed at one end of the backflush pipe, and a connecting pipe is installed at one end of the diverter pipe. A sealing assembly is provided at the other end of the backflush pipe. The sealing assembly includes a backflush head fixedly installed at the end of the backflush pipe. A telescopic rod is fixedly installed at the bottom of the inner wall of the backflush head. A sealing plug is fixedly installed at one end of the telescopic rod, and a spring is sleeved on the telescopic rod. An air hole is opened at the bottom of the backflush head.

[0013] In a preferred embodiment of the present invention, the main backflush mechanism includes a main pipe connected to a connecting pipe, and a main solenoid valve and a main pressure transmitter are installed on the main pipe. The auxiliary backflush mechanism also includes an auxiliary pipe, one end of which is connected to a gas storage tank and the other end of which is connected to the main pipe. An auxiliary solenoid valve, an auxiliary pressure transmitter, and a filter device are also installed on the auxiliary pipe.

[0014] In a preferred embodiment of the present invention, the adjustment unit further includes a drive mechanism, the drive mechanism including a cam, one end of the cam being mounted with a rotating shaft, the rotating shaft passing through the intake pipe and extending into the interior, the sealing plate being located inside the intake pipe and fixedly connected to the rotating shaft, the drive mechanism further including a power device, the output end of the power device being mounted with a turntable, a toothed plate being fixedly mounted on the outer side of the turntable, and a toothed ring being fixedly mounted on the other end of the cam, the toothed ring being adapted to the toothed plate.

[0015] In a preferred embodiment of the present invention, the transmission mechanism includes a mounting bracket, which is fixedly connected to the intake pipe. The power unit is fixedly connected to the mounting bracket. A bracket is movably inserted into the mounting bracket, and a stop bar is fixedly installed on the bracket. The stop bar is adapted to a control valve so that the control valve is activated when the stop bar moves. A plug rod is also movably inserted into the mounting bracket. A rotating component is rotatably installed at the bottom of one end of the plug rod. The rotating component is movably connected to the bracket. A push rod is also rotatably connected at the bottom of one end of the plug rod. The push rod movably passes through the connecting pipe and extends into the interior. A sealing pipe is movably connected inside the connecting pipe, and the sealing pipe is fixedly connected to the push rod.

[0016] In a preferred embodiment of the present invention, a vibration unit is further included. The vibration unit includes a rotating column, a drive shaft is fixedly mounted on the top of the rotating column, a turbine device is mounted on the top of the drive shaft, the turbine device is mounted on a backflush pipe, and the backflush pipe drives the turbine device to rotate when gas passes through it, thereby driving the drive shaft and the rotating column to rotate. A movable part is sleeved on the drive shaft, and a guide protrusion is mounted on one side of the movable part. A guide groove is provided on the rotating column, and the guide groove is adapted to the guide protrusion.

[0017] In a preferred embodiment of the present invention, the vibration unit further includes a fixing plate connected to an air inlet pipe. An air collection chamber is fixedly installed on one side of the fixing plate. An outer shell is movably inserted into the air collection chamber and connected to a filter screen. Lifting rods are fixedly installed on both sides of the outer shell. A fixing sleeve is fixedly installed on the top of the air collection chamber. A rotating frame is rotatably installed on the fixing sleeve. A second connecting rod is rotatably installed at one end of the rotating frame, and a first connecting rod is rotatably installed at one end of the second connecting rod. The first connecting rod is fixedly connected to a movable component.

[0018] In a preferred embodiment of the present invention, the vibration unit further includes a vibration damping mechanism, which includes a positioning plate fixedly mounted on a fixed plate. The positioning plate has a limiting groove and a first groove. The vibration damping mechanism also includes a swing member with sliding grooves at both ends. The sliding grooves are slidably connected to a first connecting rod. A second groove is provided on the swing member, and the swing member is movably sleeved on the positioning plate through the second groove. A limiting post is installed inside the second groove, and the limiting post is slidably connected in the limiting groove. A fixing block is also installed inside the second groove, and the fixing block contacts the inner wall of the first groove when the swing member is horizontal.

[0019] The backflushing method for a self-cleaning compressed air filter, based on the self-cleaning compressed air filter, includes the following steps:

[0020] S1. Control the power unit to work. The power unit drives the turntable and toothed plate to rotate, so that the corresponding toothed ring and cam rotate. At the same time, the cam drives the sealing plate to rotate through the rotating shaft, so that the corresponding air intake pipe is blocked and air cannot be intaked normally.

[0021] S2. The cam abuts against the corresponding bracket and moves it. During the movement of the bracket, it drives the stop lever to move, thereby opening the control valve. At the same time, during the movement of the bracket, it drives the rotating part to deflect, thereby moving the insertion rod. The insertion rod drives the push rod to move, thereby moving the sealing tube.

[0022] S3. The splitter pipe is connected to the connecting pipe. The finished compressed air from the air compressor is introduced through the main pipe, which enters the connecting pipe and the splitter pipe. It then enters the backflush head through the backflush pipe. The gas breaks through the sealing plug and is ejected through the air hole to backflush and clean the filter screen.

[0023] S4. When the pressure of the main pipeline is insufficient as detected by the main pressure transmitter, the pipeline is switched by controlling the opening and closing of the main solenoid valve and the auxiliary solenoid valve so that the high-pressure gas in the gas tank enters the connecting pipe through the auxiliary pipeline, so as to ensure that the backflush gas supplied to the filter screen has sufficient pressure.

[0024] As a preferred embodiment of the present invention, the backflushing method of the compressed air self-cleaning filter further includes the following steps:

[0025] S5. When the air compressor stops working, the two cams can be rotated by controlling the power unit and drive the two sealing plates to block the air inlet pipe together. At this time, the supports on both sides move under the action of the cams. The rotating parts move as a whole after being pushed by the supports on both sides, and drive the push rod to move, thereby reducing the sealing area of ​​the sealing pipe and increasing the gas flow rate.

[0026] S6. When the gas passes through the backflush pipe, it will pass through the turbine device. The airflow drives the turbine device to rotate, the turbine device drives the drive shaft to rotate, the drive shaft drives the rotating column to rotate, and the rotating column drives the movable part to move up and down through the guide groove and guide protrusion. The movable part drives the first connecting rod to move up and down, and the first connecting rod drives the rotating frame to swing through the second connecting rod, and drives the lifting rod to vibrate up and down, so that the outer shell and filter screen vibrate.

[0027] S7. As the first connecting rod moves up and down, it drives one end of the swinging component to move. When the first connecting rods on both sides move synchronously, the line connecting the two is in a horizontal position. At this time, the swinging component is in a horizontal position. The fixed block on the swinging component abuts against the inner wall of the first groove to obtain friction, thereby making the force on both sides of the swinging component unbalanced, thus breaking its horizontal state and preventing the synchronous movement of the first connecting rod.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] This invention uses a secondary back-blowing mechanism to back-blow the filter screen. When the compressed air introduced by the main back-blowing mechanism is insufficient, the secondary back-blowing mechanism is switched to use the high-pressure gas in the air tank to back-blow the filter screen, thus avoiding poor cleaning effect caused by insufficient air pressure.

[0030] This invention uses two sets of filters for filtration. When the air compressor is working, the working state of the two sets of filters is switched to ensure that one set of filters is still working normally during backflushing. When both sets of filters are being backflushed, the air delivery volume of the connecting pipe is automatically adjusted to accommodate the increase in the number of filters.

[0031] This invention enhances the cleaning effect by setting a vibration unit to vibrate the filter screen, and avoids the synchronous vibration of the two sets of filter screens by using a vibration damping mechanism to prevent the damage caused by resonance. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the self-cleaning compressed air filtration device of the present invention;

[0033] Figure 2 This is a schematic diagram of the internal structure of the backflush pipe of the present invention;

[0034] Figure 3 This is a schematic diagram of the insertion rod structure of the present invention;

[0035] Figure 4 This is a schematic diagram of the internal structure of the intake pipe of the present invention;

[0036] Figure 5 This is a schematic diagram of the structure of the sealing plate of the present invention;

[0037] Figure 6 This is a schematic diagram of the cam structure of the present invention;

[0038] Figure 7 This is a schematic diagram of the internal structure of the backflush head of the present invention;

[0039] Figure 8 This is a schematic diagram of the exploded structure at the rotating column of the present invention;

[0040] Figure 9 This is a schematic diagram of the rotating frame structure of the present invention;

[0041] Figure 10 This is a schematic diagram of the positioning plate structure of the present invention;

[0042] Figure 11 This is a schematic diagram of the structure at the fixing block of the present invention.

[0043] Figure label:

[0044] 100. Intake pipe; 101. Venturi tube; 102. Bellows; 103. Air collection chamber; 104. Outer shell; 105. Filter screen;

[0045] 200. Backflush pipe; 201. Control valve; 202. Diverter pipe; 203. Connecting pipe; 204. Main pipeline; 205. Main solenoid valve; 206. Main pressure transmitter; 207. Secondary pipeline; 208. Air tank; 209. Air pump; 210. Secondary pressure transmitter; 211. Secondary solenoid valve; 212. Filter device; 213. Backflush head; 214. Telescopic rod; 215. Sealing plug; 216. Spring; 217. Air hole;

[0046] 300. Sealing plate; 301. Rotating shaft; 302. Cam; 303. Gear ring; 304. Power unit; 305. Turntable; 306. Gear plate;

[0047] 400. Mounting bracket; 401. Support; 402. Stop bar; 403. Rotating component; 404. Insert rod; 405. Push rod; 406. Sealing pipe;

[0048] 500. Fixed plate; 501. Drive shaft; 502. Turbine device; 503. Rotating column; 504. Guide groove; 505. Moving part; 506. Guide protrusion; 507. First connecting rod; 508. Second connecting rod; 509. Rotating frame; 510. Fixed sleeve; 511. Lifting rod;

[0049] 600, Positioning plate; 601, Limiting groove; 602, First groove; 603, Swinging component; 604, Sliding groove; 605, Second groove; 606, Limiting post; 607, Fixing block. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0051] Example 1

[0052] like Figures 1 to 11 As shown, the compressed air self-cleaning filter includes:

[0053] The filter unit includes a filter screen 105. Two sets of filter units are provided for switching during air compressor operation to ensure that the air compressor operation is not affected during backflushing cleaning.

[0054] The back-flushing unit includes a main back-flushing mechanism and a secondary back-flushing mechanism. The main back-flushing mechanism uses the finished gas from the compressor to back-flush the filter screen 105. The secondary back-flushing mechanism includes an air storage tank 208 and an air pump 209. The secondary back-flushing mechanism uses the gas stored in the air storage tank 208 to back-flush the filter screen 105.

[0055] The regulating unit includes a control valve 201 and a sealing plate 300. The regulating unit also includes a transmission mechanism. When the sealing plate 300 rotates, the operating state of the control valve 201 is changed through the transmission mechanism.

[0056] like Figure 1 , Figure 4 , Figure 7 As shown, in a specific embodiment, the filter unit also includes a corrugated pipe 102 installed on the top of the filter screen 105, a venturi tube 101 installed on the top of the corrugated pipe 102, and an air inlet pipe 100 installed on the top of the venturi tube 101.

[0057] The backflush unit also includes a conveying mechanism, which includes a backflush pipe 200. One end of the backflush pipe 200 extends into the air inlet pipe 100. A control valve 201 is installed on the backflush pipe 200. A diverter pipe 202 is installed at one end of the backflush pipe 200. A connecting pipe 203 is installed at one end of the diverter pipe 202. A sealing assembly is provided at the other end of the backflush pipe 200. The sealing assembly includes a backflush head 213 fixedly installed at the end of the backflush pipe 200. A telescopic rod 214 is fixedly installed at the bottom of the inner wall of the backflush head 213. A sealing plug 215 is fixedly installed at one end of the telescopic rod 214, and a spring 216 is sleeved on the telescopic rod 214. An air hole 217 is opened at the bottom of the backflush head 213. In this configuration, when the backflush pipe 200 is not working, the elastic force of the spring 216 acts on the sealing plug 215 to block the backflush pipe 200, thus preventing air drawn in by the air intake pipe 100 from entering the backflush pipe 200 when the air compressor is working.

[0058] like Figure 1 As shown, the main backflush mechanism further includes a main pipe 204, which is connected to a connecting pipe 203. A main solenoid valve 205 and a main pressure transmitter 206 are installed on the main pipe 204. The auxiliary backflush mechanism also includes a secondary pipe 207, one end of which is connected to an air storage tank 208, and the other end to the main pipe 204. A secondary solenoid valve 211, a secondary pressure transmitter 210, and a filter device 212 are also installed on the secondary pipe 207. In this configuration, the air introduced through the main pipe 204 is the finished air from the air compressor, which has already been filtered and does not require further filtration. The air introduced through the secondary pipe 207 is from the air storage tank 208 and needs to be filtered by the filter device 212. A differential pressure transmitter is also installed at the filter screen 105 to detect the pressure difference across the filter screen 105, in order to determine the blockage status of the filter screen 105.

[0059] Example 2

[0060] like Figures 5 to 6 As shown, in a specific embodiment, the adjustment unit further includes a drive mechanism, which includes a cam 302. A rotating shaft 301 is mounted on one end of the cam 302, passing through the intake pipe 100 and extending into it. A sealing plate 300 is located inside the intake pipe 100 and is fixedly connected to the rotating shaft 301. The drive mechanism also includes a power unit 304. A turntable 305 is mounted on the output end of the power unit 304. A toothed plate 306 is fixedly mounted on the outer side of the turntable 305. A toothed ring 303 is fixedly mounted on the other end of the cam 302, and the toothed ring 303 is adapted to the toothed plate 306. In this configuration, the toothed plate 306 is a slightly curved shape that fits against the outer side of the turntable 305. When the turntable 305 and the toothed plate 306 rotate one revolution, the cam 302 and the toothed ring 303 only rotate ninety degrees under the action of meshing. By controlling the forward and reverse rotation of the turntable 305 and the toothed plate 306, the cam 302 and the toothed ring 303 can be rotated to different positions.

[0061] like Figures 2 to 5 As shown, the transmission mechanism further includes a mounting bracket 400, which is fixedly connected to the intake pipe 100. The power unit 304 is fixedly connected to the mounting bracket 400. A bracket 401 is movably inserted into the mounting bracket 400. A stop lever 402 is fixedly installed on the bracket 401. The stop lever 402 is adapted to the control valve 201 so that the control valve 201 can be actuated when the stop lever 402 moves. A plug rod 404 is also movably inserted into the mounting bracket 400. A rotating part 403 is rotatably installed at the bottom of one end of the plug rod 404. The rotating part 403 is movably connected to the bracket 401. A push rod 405 is also rotatably connected at the bottom of one end of the plug rod 404. The push rod 405 movably passes through the connecting pipe 203 and extends into the interior. A sealing pipe 406 is movably connected inside the connecting pipe 203. The sealing pipe 406 is fixedly connected to the push rod 405. In this configuration, when only one side of the bracket 401 moves, only one end of the rotating member 403 moves accordingly, and the distance the middle position moves is half the distance the end moves. When both sides of the bracket 401 move together, the distance the middle position moves is the same as the distance the end moves.

[0062] Example 3

[0063] like Figure 4 , Figures 8 to 9As shown, in a specific embodiment, the compressed air self-cleaning filter also includes a vibration unit. The vibration unit includes a rotating column 503, a drive shaft 501 fixedly mounted on the top of the rotating column 503, and a turbine device 502 mounted on the top of the drive shaft 501. The turbine device 502 is mounted on the backflush pipe 200. When gas passes through the backflush pipe 200, it drives the turbine device 502 to rotate, thereby driving the drive shaft 501 and the rotating column 503 to rotate. A movable part 505 is sleeved on the drive shaft 501, and a guide protrusion 506 is mounted on one side of the movable part 505. A guide groove 504 is provided on the rotating column 503, and the guide groove 504 is adapted to the guide protrusion 506. In this configuration, the guide groove 504 includes a rising section and a breaking section. When the guide protrusion 506 is in the rising section, it drives the movable part 505 to rise. When it moves to the breaking section, it descends under the action of gravity.

[0064] like Figures 8 to 9 As shown, the vibration unit further includes a fixed plate 500, which is connected to the air inlet pipe 100. An air collection chamber 103 is fixedly installed on one side of the fixed plate 500. An outer shell 104 is movably inserted into the air collection chamber 103. The outer shell 104 is connected to the filter screen 105. Lifting rods 511 are fixedly installed on both sides of the outer shell 104. A fixed sleeve 510 is fixedly installed on the top of the air collection chamber 103. A rotating frame 509 is rotatably installed on the fixed sleeve 510. A second connecting rod 508 is rotatably installed at one end of the rotating frame 509. A first connecting rod 507 is rotatably installed at one end of the second connecting rod 508. The first connecting rod 507 is fixedly connected to the movable part 505. In this configuration, when the rotating frame 509 rotates, it can simultaneously move the lifting rods 511 on both sides. When the first connecting rod 507 drives the rotating frame 509 to swing through the second connecting rod 508, the lifting rods 511 on both sides are subjected to force together so that the outer shell 104 will not be jammed due to uneven force during vibration.

[0065] like Figures 10 to 11As shown, the vibration unit further includes a vibration damping mechanism, which includes a positioning plate 600 fixedly mounted on the fixed plate 500. The positioning plate 600 has a limiting groove 601 and a first groove 602. The vibration damping mechanism also includes a swing member 603. The swing member 603 has sliding grooves 604 at both ends. The sliding grooves 604 are slidably connected to the first connecting rod 507. The swing member 603 has a second groove 605. The swing member 603 is movably sleeved on the positioning plate 600 through the second groove 605. A limiting post 606 is installed inside the second groove 605. The limiting post 606 is slidably connected in the limiting groove 601. A fixing block 607 is also installed inside the second groove 605. The fixing block 607 contacts the inner wall of the first groove 602 when the swing member 603 is horizontal. In this configuration, a rubber pad is provided on one side of the fixed block 607. When the swing member 603 is horizontal, the rubber pad slightly presses the inner wall of the first groove 602 to obtain friction. The positioning plate 600 can always be in the middle position of the swing member 603 through the limiting groove 601 and the limiting post 606.

[0066] The backflushing method of the self-cleaning compressed air filter, based on the self-cleaning compressed air filter, includes: during backflushing cleaning, finished compressed air from the air compressor is introduced through the main pipe 204 and enters the connecting pipe 203. When one of the filter screens 105 needs cleaning, the power unit 304 is activated. The power unit 304 drives the turntable 305 and the toothed plate 306 to rotate, causing the corresponding toothed ring 303 and cam 302 to rotate. Simultaneously, the cam 302 drives the sealing plate 300 to rotate through the rotating shaft 301, thereby blocking the corresponding air intake pipe 100 and preventing normal air intake. 302 presses against the corresponding bracket 401 and moves it. During the movement of the bracket 401, it drives the stop rod 402 to move, thereby opening the control valve 201. At the same time, during the movement of the bracket 401, it drives the rotating part 403 to deflect, thereby moving the insertion rod 404. The insertion rod 404 drives the push rod 405 to move, thereby moving the sealing tube 406. At this time, the diversion pipe 202 is connected to the connecting pipe 203. Gas enters the diversion pipe 202 and enters the backflush head 213 through the backflush pipe 200. The gas breaks through the sealing plug 215 and is ejected through the air hole 217 to backflush and clean the filter screen 105.

[0067] When the main pressure transmitter 206 detects that the pressure in the main pipeline 204 is insufficient, the pipeline is switched by controlling the opening and closing of the main solenoid valve 205 and the auxiliary solenoid valve 211 so that the high-pressure gas in the gas storage tank 208 enters the connecting pipe 203 through the auxiliary pipeline 207, so as to ensure that the backflush gas supplied to the filter screen 105 has sufficient pressure.

[0068] When the air compressor stops working, the two cams 302 can be rotated by controlling the power unit 304, which will drive the two sealing plates 300 to block the air intake pipe 100 together. At this time, the supports 401 on both sides move under the action of the cams 302. The rotating part 403 moves as a whole after being pushed by the supports 401 on both sides, and drives the push rod 405 to move. Compared with the push rod 405 being pushed by only one side of the support 401, the push rod 405 moves a greater distance, so that the sealing pipe 406 moves a greater distance, thereby reducing the sealing area of ​​the sealing pipe 406 and increasing the gas flow rate.

[0069] When the gas passes through the backflush pipe 200, it passes through the turbine device 502. The airflow drives the turbine device 502 to rotate, which in turn drives the drive shaft 501 to rotate. The drive shaft 501 drives the rotating column 503 to rotate. The rotating column 503 drives the movable part 505 to move up and down through the guide groove 504 and the guide protrusion 506. The movable part 505 drives the first connecting rod 507 to move up and down. The first connecting rod 507 drives the rotating frame 509 to swing through the second connecting rod 508, and drives the lifting rod 511 to vibrate up and down, so that the outer shell 104 and the filter screen 105 vibrate.

[0070] While the first connecting rod 507 moves up and down, it drives one end of the swing member 603 to move. When the first connecting rods 507 on both sides move synchronously, the line connecting them is in a horizontal position. At this time, the swing member 603 is in a horizontal position. The fixing block 607 on the swing member 603 abuts against the inner wall of the first groove 602 to obtain friction, thereby making the force on both sides of the swing member 603 unbalanced, thus breaking its horizontal state and avoiding the synchronous movement of the first connecting rods 507, thereby preventing the harm caused by resonance. When the first connecting rods 507 on both sides move asynchronously, the swing member 603 is in an inclined state. At this time, the fixing block 607 does not contact the first groove 602, and the first connecting rods 507 on both sides move normally.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A self-cleaning compressed air filtration device, characterized in that, include: A filtration unit, the filtration unit including a filter screen (105); The back-flushing unit includes a main back-flushing mechanism and a secondary back-flushing mechanism. The main back-flushing mechanism uses the finished gas from the compressor to back-flush the filter screen (105). The secondary back-flushing mechanism includes a gas storage tank (208) and an air pump (209). The secondary back-flushing mechanism uses the gas stored in the gas storage tank (208) to back-flush the filter screen (105). The regulating unit includes a control valve (201) and a sealing plate (300). The regulating unit also includes a transmission mechanism. When the sealing plate (300) rotates, the working state of the control valve (201) is changed through the transmission mechanism. The filter unit also includes a corrugated tube (102) installed on top of the filter screen (105), a venturi tube (101) installed on top of the corrugated tube (102), and an air inlet tube (100) installed on top of the venturi tube (101). The backflush unit also includes a conveying mechanism, which includes a backflush pipe (200). One end of the backflush pipe (200) extends into the air inlet pipe (100). The control valve (201) is installed on the backflush pipe (200). A diverter pipe (202) is installed at one end of the backflush pipe (200). A connecting pipe (203) is installed at one end of the diverter pipe (202). A sealing assembly is provided at the other end of the backflush pipe (200). The sealing assembly includes a backflush head (213) fixedly installed at the end of the backflush pipe (200). A telescopic rod (214) is fixedly installed at the bottom of the inner wall of the backflush head (213). A sealing plug (215) is fixedly installed at one end of the telescopic rod (214), and a spring (216) is sleeved on the telescopic rod (214). An air hole (217) is opened at the bottom of the backflush head (213). The adjustment unit further includes a drive mechanism, which includes a cam (302). One end of the cam (302) is equipped with a rotating shaft (301). The rotating shaft (301) passes through the intake pipe (100) and extends into the interior. The sealing plate (300) is located inside the intake pipe (100) and is fixedly connected to the rotating shaft (301). The drive mechanism also includes a power device (304). The output end of the power device (304) is equipped with a turntable (305). A toothed plate (306) is fixedly installed on the outside of the turntable (305). The other end of the cam (302) is fixedly equipped with a toothed ring (303), and the toothed ring (303) is adapted to the toothed plate (306). The transmission mechanism includes a mounting bracket (400), which is fixedly connected to the intake pipe (100). The power unit (304) is fixedly connected to the mounting bracket (400). A bracket (401) is movably inserted into the mounting bracket (400). A stop lever (402) is fixedly mounted on the bracket (401). The stop lever (402) is adapted to the control valve (201) so that when the stop lever (402) moves, it drives the control valve (201) to operate. A plug rod (404) is also movably connected. A rotating part (403) is rotatably installed at the bottom of one end of the plug rod (404). The rotating part (403) is movably connected to the bracket (401). A push rod (405) is also rotatably connected at the bottom of one end of the plug rod (404). The push rod (405) movably passes through the connecting tube (203) and extends into the interior. A sealing tube (406) is movably connected inside the connecting tube (203). The sealing tube (406) is fixedly connected to the push rod (405). It also includes a vibration unit, which includes a rotating column (503). A drive shaft (501) is fixedly installed on the top of the rotating column (503). A turbine device (502) is installed on the top of the drive shaft (501). The turbine device (502) is installed on the backflush pipe (200). When the backflush pipe (200) passes through the gas, it drives the turbine device (502) to rotate, thereby driving the drive shaft (501) and the rotating column (503) to rotate. A movable part (505) is sleeved on the drive shaft (501). A guide protrusion (506) is installed on one side of the movable part (505). A guide groove (504) is opened on the rotating column (503). The guide groove (504) is adapted to the guide protrusion (506).

2. The compressed air self-cleaning filter according to claim 1, characterized in that, The main backflush mechanism includes a main pipe (204), which is connected to a connecting pipe (203). A main solenoid valve (205) and a main pressure transmitter (206) are installed on the main pipe (204). The auxiliary backflush mechanism also includes an auxiliary pipe (207), one end of which is connected to a gas storage tank (208), and the other end is connected to the main pipe (204). An auxiliary solenoid valve (211), an auxiliary pressure transmitter (210), and a filter device (212) are also installed on the auxiliary pipe (207).

3. The compressed air self-cleaning filter according to claim 2, characterized in that, The vibration unit also includes a fixed plate (500), which is connected to the air inlet pipe (100). An air collection chamber (103) is fixedly installed on one side of the fixed plate (500). An outer shell (104) is movably inserted into the air collection chamber (103). The outer shell (104) is connected to the filter screen (105). Lifting rods (511) are fixedly installed on both sides of the outer shell (104). A fixed sleeve (510) is fixedly installed on the top of the air collection chamber (103). A rotating frame (509) is rotatably installed on the fixed sleeve (510). A second connecting rod (508) is rotatably installed at one end of the rotating frame (509). A first connecting rod (507) is rotatably installed at one end of the second connecting rod (508). The first connecting rod (507) is fixedly connected to the movable part (505).

4. The self-cleaning compressed air filtration device according to claim 3, characterized in that, The vibration unit also includes a vibration damping mechanism, which includes a positioning plate (600) fixedly mounted on a fixed plate (500). The positioning plate (600) has a limiting groove (601) and a first groove (602). The vibration damping mechanism also includes a swing member (603). The swing member (603) has sliding grooves (604) at both ends. The sliding grooves (604) are slidably connected to the first connecting rod (507). The swing member (603) has a second groove (605). The swing member (603) is movably sleeved on the positioning plate (600) through the second groove (605). A limiting post (606) is installed inside the second groove (605). The limiting post (606) is slidably connected in the limiting groove (601). A fixing block (607) is also installed inside the second groove (605). The fixing block (607) contacts the inner wall of the first groove (602) when the swing member (603) is horizontal.

5. A backflushing method for a self-cleaning compressed air filter, implemented based on the self-cleaning compressed air filter of claim 4, characterized in that, Includes the following steps: S1. Control the power unit (304) to work. The power unit (304) drives the turntable (305) and the toothed plate (306) to rotate, so that the corresponding toothed ring (303) and cam (302) rotate. At the same time, the cam (302) drives the sealing plate (300) to rotate through the rotating shaft (301), so that the corresponding air intake pipe (100) is blocked and cannot be properly intaked. S2, the cam (302) abuts against the corresponding bracket (401) and moves it. During the movement of the bracket (401), the stop rod (402) moves to open the control valve (201). At the same time, during the movement of the bracket (401), the rotating part (403) deflects to move the insertion rod (404). The insertion rod (404) moves the push rod (405) to move the sealing tube (406). S3. The split pipe (202) is connected to the connecting pipe (203). The finished compressed air of the air compressor is introduced through the main pipe (204), so that it enters the connecting pipe (203) and the split pipe (202). It enters the backflush head (213) through the backflush pipe (200). The gas breaks through the sealing plug (215) and is ejected through the air hole (217) to backflush and clean the filter screen (105). S4. When the pressure of the main pipeline (204) is insufficient as detected by the main pressure transmitter (206), the pipeline is switched by controlling the opening and closing of the main solenoid valve (205) and the auxiliary solenoid valve (211) so that the high pressure gas in the gas storage tank (208) enters the connecting pipe (203) after passing through the auxiliary pipeline (207) to ensure that the backflush gas supplied to the filter screen (105) has sufficient pressure.

6. The backflushing method for the self-cleaning compressed air filter according to claim 5, characterized in that, It also includes the following steps: S5. When the air compressor stops working, the two cams (302) can be rotated by controlling the power unit (304) and drive the two sealing plates (300) to block the air inlet pipe (100) together. At this time, the supports (401) on both sides move under the action of the cams (302). The rotating part (403) moves as a whole after being pushed by the supports (401) on both sides, and drives the push rod (405) to move, thereby reducing the sealing area of ​​the sealing pipe (406) and increasing the gas flow rate. S6. When the gas passes through the backflush pipe (200), it will pass through the turbine device (502). The airflow drives the turbine device (502) to rotate. The turbine device (502) drives the drive shaft (501) to rotate. The drive shaft (501) drives the rotating column (503) to rotate. The rotating column (503) drives the movable part (505) to move up and down through the guide groove (504) and the guide protrusion (506). The movable part (505) drives the first connecting rod (507) to move up and down. The first connecting rod (507) drives the rotating frame (509) to swing through the second connecting rod (508) and drives the lifting rod (511) to vibrate up and down, so that the outer shell (104) and the filter screen (105) vibrate. S7. When the first connecting rod (507) moves up and down, it drives one end of the swing member (603) to move. When the first connecting rods (507) on both sides move synchronously, the line connecting the two is in a horizontal position. At this time, the swing member (603) is in a horizontal position. The fixed block (607) on the swing member (603) abuts against the inner wall of the first groove (602) to obtain friction, thereby making the force on both sides of the swing member (603) unbalanced, thus breaking its horizontal state and avoiding the synchronous movement of the first connecting rod (507).

Images