A backflushing mechanism for preventing clogging of a fluid filter

Abstract

This invention relates to the field of separation filter technology and discloses a backflushing mechanism for preventing clogging of a fluid filter. The mechanism includes an air cylinder, a connecting cylinder fixedly connected to one end of the air cylinder, an air outlet pipe fixedly connected to the connecting cylinder, a filtration zone inside the air cylinder, a safety valve fixedly installed on the air cylinder, a push rod movably connected to the inner side of the safety valve, a carrier plate rotatably connected to one end of the push rod, and multiple filter cartridges rotatably connected to the carrier plate. Each filter cartridge has multiple filter holes. A first gear is fixedly installed at one end of each filter cartridge, and a second gear is fixedly installed at the other end. Both the first and second gears are rotatably connected to the carrier plate. A filter element is detachably connected to each first gear. This backflushing mechanism for preventing clogging of a fluid filter allows the filter cartridge to cut through the surrounding gas through the filter holes, thereby transferring more gas into and acting on the surface of the filter element, further increasing the contact area between the filter element and the surrounding gas, and improving the filtration effect of the device.

Description

Technical Field

[0001] This invention relates to the field of separation filter technology, specifically to a backflushing mechanism for preventing clogging of a fluid filter. Background Technology

[0002] Trailer control valve assemblies are essential components for truck installation. During installation, they are mounted on the truck to synchronize the braking of the main truck and trailer. The purpose is to regulate the air passage speed and pressure of the main and trailer brakes, preventing the trailer from locking up due to sudden braking and optimizing braking smoothness. These valves are core components of the heavy-duty truck air circuit. Different models (Dongfeng, Sinotruk, Shaanxi Automobile, etc.) will have corresponding models, but the basic operating principle is the same.

[0003] When not braking, the foot brake pedal is released, and there is no control air pressure; the handbrake lever is in the driving position, and high-pressure air is continuously supplied. The air pressure then pushes the piston inside the valve downwards, closing the air intake passage and simultaneously opening the exhaust passage, maintaining low pressure in the control line, thus releasing the trailer brake. The main air intake continuously inflates the trailer air tank through the connector until the pressure in the trailer air tank is balanced with that of the trailer, the piston inside the valve experiences balanced forces, and inflation automatically stops, maintaining stable line pressure. Models with a throttling function will regulate the inflation speed through the throttling orifice to avoid impact, while ensuring the trailer air tank is always fully pressurized and ready for use.

[0004] Service Braking (Brake Depressed) Status: The balance piston inside the valve automatically adjusts its opening according to the output air pressure to achieve brake responsiveness: the harder the brake is applied, the higher the control air pressure, and the greater the brake air pressure output to the trailer, linearly matching the braking force to the tractor. This valve assembly requires sufficient gas as a driving force. The gas needs to be filtered when entering the valve assembly to prevent damage to the piston inside the valve assembly. Currently, a safety valve is used as the gas intake guarantee. The intake system is equipped with a safety valve to protect high-temperature and high-pressure pipelines and equipment. Therefore, the safety valve and its pipeline bear the load of a high-pressure environment. When the safety valve is inlet or outlet, the rapid flow of fluid in the pipeline will generate a certain force on the discharge pipeline, and this force will be transmitted back to the safety valve through the discharge pipeline. This force will act as torque through the pipeline on the interface flange and inlet pipeline of the safety valve, resulting in high discharge pressure and large flow of the safety valve, generating a large torque. For example, Chinese patent authorization number CN218530200U describes a method for backwashing the filter cartridge inside a dust collector. The dust collector equipment originally attached to the dust collector can be removed, and then connected to the upper and lower ends of the dust collector via end caps and bottom caps. Air is guided into the dust collector through the air inlet of the bottom cap, and the air is introduced between the inner wall of the dust collector and the outer side of the filter cartridge. Thus, the air passes through the filter cartridge and moves into its interior. During this process, dust that was originally adhered to the inner surface of the filter cartridge or embedded within it is blown out in the opposite direction. However, this method often requires regular disassembly and cleaning of the filter cartridge, which is quite troublesome. For example, Chinese patent authorization number CN218687615U describes a process where gas enters through the inlet pipe of an ash storage tank, is filtered by the filter element, and then the gas backflushes against the filter element after both the first one-way valve on the backflushing pipe and the second one-way valve on the ash discharge pipe are opened, removing blockages. However, this requires a separate gas input channel, and the filter element is fixed inside the filter tube. In practice, the filter element is in frequent contact with the gas, resulting in poor pre-filtration and easy clogging over time. This necessitates frequent nitrogen injection for cleaning, leading to high operating costs. Both of these issues prevent the valve from being cleaned promptly during continuous operation. Therefore, a specific backflushing structure is needed to counteract the impact of the discharge reaction force and remove impurities. To address this, we propose a backflushing mechanism for preventing clogging in fluid filters. Summary of the Invention

[0005] The purpose of this invention is to provide a backflushing mechanism for preventing clogging of a fluid filter, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a backflushing mechanism for preventing clogging of a fluid filter, comprising an air cylinder, a connecting cylinder fixedly connected to one end of the air cylinder, an air outlet pipe fixedly connected to the connecting cylinder, a filtration zone opened inside the air cylinder, a safety valve fixedly installed on the air cylinder, a push rod movably connected to the inner side of the safety valve, a carrying plate rotatably connected to one end of the push rod, multiple filter cylinders rotatably connected to the carrying plate, each filter cylinder having multiple filter holes, a first gear fixedly installed at one end of the filter cylinder, a second gear fixedly installed at the other end of the filter cylinder, both the first and second gears being rotatably connected to the carrying plate, a filter element detachably connected to each first gear, a motor detachably connected to the outside of the air cylinder, the motor output shaft being connected to the carrying plate, multiple first toothed rings suspended at the bottom of the push rod, and multiple second toothed rings fixedly installed inside the air cylinder; when the carrying plate extends into the air cylinder, the second gears mesh with the first toothed rings, and the first gears and second toothed rings mesh.

[0007] Preferably, there are at least four first toothed rings and two toothed rings, with the first toothed rings arranged next to the top of the carrier plate, and the positions of the first toothed rings and the second toothed rings inside the air cylinder being staggered.

[0008] Preferably, a first filter plate is fixedly installed on one side of the filtration zone, and a second filter plate is fixedly installed on the other side of the filtration zone. The first filter plate and the second filter plate are parallel to each other and arranged opposite to each other. A transition zone for gas flow and exchange is formed between the first filter plate and the second filter plate. Multiple tiny air leakage holes are evenly opened on both the first filter plate and the second filter plate, and their total area accounts for half of the effective surface area of ​​the first filter plate and the second filter plate themselves.

[0009] Preferably, the safety valve is threaded with a movable core, which is fixedly connected to the plunger. A sealing plug is fixedly connected to the middle of the plunger. A first spring is connected between the sealing plug and the safety valve. A locking strip for locking the plunger is threaded onto the outside of the safety valve.

[0010] Preferably, a gas distribution chamber is fixedly installed in the middle of the air cylinder, and a duct is opened inside the gas distribution chamber. The duct is connected to the air cylinder. Multiple gas distribution holes are opened on the air cylinder. A venting area is opened at the other end of the air cylinder. A second spring is fixedly connected to one side of the connecting cylinder. A baffle is fixedly connected to one end of the second spring. A sealing ring is fixedly installed on the outer ring of the baffle. The sealing ring is slidably connected to the air cylinder.

[0011] Preferably, a rotating ring is rotatably connected inside the middle of the air cylinder. The rotating ring has multiple air passage holes in a ring shape. Multiple protrusions are fixedly installed on the inner ring of the rotating ring. A counter-protrusion that cooperates with the protrusions is fixedly installed on the outer ring of the sealing ring. The sealing ring is linearly slidably connected to the air cylinder through the counter-protrusion. The diameter of the air passage holes is equal to that of the air distribution holes.

[0012] Preferably, a sealing head is sleeved on the motor output shaft, and multiple gas channels are opened on the sealing head. The bottom of the carrier plate abuts against the sealing head, and the sealing head and the air cylinder are snapped together. Each filter element has a cleaning ring slidably connected to its outer ring. Multiple extension rods are fixedly connected to the bottom of the cleaning ring. A push plate is fixedly connected between the bottoms of the multiple extension rods. A piston is fixedly connected to the bottom of the push plate. The dimensions of the push plate, piston, and gas channels of the sealing head are matched.

[0013] Preferably, a copper sheet is installed on the top of the movable core, and the materials of the shovel rod, the movable core, and the carrier plate are all made of conductive metal.

[0014] Preferably, the bottom of the sealing head is detachably connected to a discharge plate, which is a replaceable sealing gasket made of fluororubber with a Shore hardness of 70A±5.

[0015] Preferably, each filter hole is tilted on the filter cartridge at an angle of 15° to 30°.

[0016] Compared with the prior art, the beneficial effects of the present invention are: During the rotation of the carrier plate, the first gear and the second gear ring come into contact. The first gear rotates on the carrier plate, causing the gas to come into contact with the filter cylinder and filter element. The filter element adsorbs impurities in the gas, thereby cleaning the gas entering the control valve and ensuring that the push plate inside the control valve is not damaged. As the filter element rotates with the carrier plate, the contact surface between each filter element and the incoming gas increases, increasing the effective area of ​​the filter element and improving its performance. After the first gear and the second gear ring separate, the second gear immediately meshes with the first gear ring, so that the rotation direction of the second gear is opposite to that of the first gear. This allows the filter cylinder to cut through the surrounding gas through the filter holes, thereby transferring more gas into the filter element surface and further increasing the contact surface between the filter element and the surrounding gas, thus improving the filtration effect of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall internal structure of the present invention; Figure 3 This is a schematic diagram of the overall planar structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A; Figure 5 For the present invention Figure 2 Enlarged structural diagram at point B; Figure 6 This is a schematic diagram of the carrier plate and filter element structure of the present invention; Figure 7 This is a schematic diagram of the sealing head structure of the present invention; Figure 8 This is a schematic diagram of the rotating ring and sealing ring structure of the present invention; Figure 9 This is a schematic cross-sectional view of the air cylinder structure of the present invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram at point C; Figure 11 This is a schematic diagram of the carrier plate and the sealing head structure of the present invention; Figure 12 For the present invention Figure 11 Enlarged structural diagram at point D; Figure 13 This is a schematic diagram of the pusher plate of the present invention moving in the gas channel.

[0018] In the diagram: 1-Air cylinder; 101-Vent zone; 102-Filter zone; 103-Air distribution hole; 2-Connecting cylinder; 201-Outlet pipe; 3-Safety valve; 301-Vibrating core; 302-First spring; 303-Locking strip; 304-Punch rod; 305-Sealing plug; 4-Air distribution chamber; 5-Motor; 6-First filter plate; 7-Second filter plate; 8-Second spring; 9-Baffle plate; 901-Sealing ring; 1 0-Ductwork; 11-Rotating ring; 1101-Air passage; 12-Sealing plug; 1201-Unloading plate; 1202-Gas passage; 13-Carrier plate; 14-First gear; 15-Second gear; 16-Filter cartridge; 17-Filter hole; 18-Extension rod; 19-Cleaning ring; 20-Push plate; 2001-Piston; 21-Filter element; 22-First gear ring; 23-Second gear ring; 24-Transition zone. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-13This invention provides a technical solution: a backflushing mechanism for preventing clogging of a fluid filter, comprising an air cylinder 1, a connecting cylinder 2 fixedly connected to one end of the air cylinder 1, an air outlet pipe 201 fixedly connected to the connecting cylinder 2, a filtration zone 102 opened inside the air cylinder 1, a safety valve 3 fixedly installed on the air cylinder 1, a push rod 304 movably connected to the inner side of the safety valve 3, a carrying plate 13 rotatably connected to one end of the push rod 304, a plurality of filter cylinders 16 rotatably connected to the carrying plate 13, each filter cylinder 16 having a plurality of filter holes 17, a first gear 14 fixedly installed at one end of the filter cylinder 16, and a second gear 15 fixedly installed at the other end of the filter cylinder 16, both the first gear 14 and the second gear 15 being rotatably connected to the carrying plate 13, and a filter element being detachably connected to each first gear 14. 21. A motor 5 is detachably connected to the outside of the air cylinder 1. The output shaft of the motor 5 is connected to the carrying plate 13. Multiple first toothed rings 22 are suspended at the bottom of the push rod 304. Multiple second toothed rings 23 are fixedly installed inside the air cylinder 1. When the carrying plate 13 extends into the air cylinder 1, the second gear 15 meshes with the first toothed ring 22, and the first gear 14 meshes with the second toothed ring 23. Each filter hole 17 is inclined on the filter cylinder 16, and the inclination angle is 15° to 30° to enhance the tangential scouring effect of the airflow on the filter element surface. The number of first toothed rings 22 and second toothed rings 23 is at least 4. The first toothed rings 22 are arranged next to the top of the carrying plate 13. The positions of the first toothed rings 22 and second toothed rings 23 inside the air cylinder 1 are staggered.Air cylinder 1 is installed on the car. Valves (existing structure, not shown) are installed at one end of air cylinder 1 and one end of the air outlet pipe 201. When the car's control valve needs air intake, the valve at one end of air cylinder 1 opens. The air outlet pipe 201 is a three-way valve connected to a negative pressure pump. The car's negative pressure pump creates a negative pressure environment in air cylinder 1, allowing air to enter through one end. After a short time, the valve closes quickly (because the control valve consumes relatively little gas when the brake is applied, the air tank is easily filled. Therefore, after each brake application, the gas is replenished quickly, and the entire valve assembly's intake valve can be directly closed to prevent excess gas from entering). External gas enters the filter area 102. Simultaneously, the background drive motor 5 rotates. When motor 5 rotates, it drives the loading plate 13 to rotate at a low speed inside air cylinder 1. During the rotation of the loading plate 13, the first gear 14 and the second gear ring 23 come into contact, causing the first gear 14 to rotate on the loading plate 13. This allows the gas to come into contact with the filter cartridge 16 and filter element 21, enabling the filter element 21 to adsorb impurities in the gas, thereby cleaning the gas entering the control valve and ensuring that the piston inside the control valve is not damaged. As the filter element 21 rotates along with the carrier plate 13, the contact surface between each filter element 21 and the incoming gas increases, increasing the effective area of ​​the filter element 21 and improving its performance. After the first gear 14 and the second gear ring 23 separate, the second gear 15 immediately meshes with the first gear ring 22, causing the rotation direction of the second gear 15 to be opposite to that of the first gear 14. This allows the filter cartridge 16 to cut through the surrounding gas through the filter holes 17, transferring more gas to the surface of the filter element 21, further increasing the contact surface between the filter element 21 and the surrounding gas, and improving the filtration effect of the device. It is worth mentioning that the filter element 21 can be composed of HEPA composite material and some activated carbon, adsorbing dust particles and sulfide corrosion products present in the gas.

[0021] Furthermore, a first filter plate 6 is fixedly installed on one side of the filtration zone 102, while a second filter plate 7 is fixedly installed on the other side of the filtration zone 102. The first filter plate 6 and the second filter plate 7 are parallel to each other and arranged opposite to each other. A transition zone 24 for gas flow and exchange is formed between the first filter plate 6 and the second filter plate 7. Multiple tiny air leakage holes are evenly opened on the first filter plate 6 and the second filter plate 7. Their total area accounts for half of the effective surface area of ​​the first filter plate 6 and the second filter plate 7. When the valve of the air cylinder 1 is opened, gas is drawn in by the first filter plate 6, so that the gas enters the transition zone 24 through the air leakage holes, and then comes into contact with the filter element 21. The transition zone 24 buffers the gas. The design of the transition zone 24 makes itself have a viscous effect on the gas, so that the gas passes through the surface of the filter element 21 at a low speed, thereby increasing the filtration time of the filter element 21.

[0022] Furthermore, a piston 301 is threaded onto the safety valve 3, and the piston 301 and the push rod 304 are fixedly connected together. A sealing plug 305 is fixedly connected to the middle of the push rod 304, and a first spring 302 connects the sealing plug 305 and the safety valve 3. A locking strip 303 for locking the push rod 304 is threaded onto the outside of the safety valve 3. A copper sheet is installed on the top of the piston 301. The push rod 304, the piston 301, and the carrier plate 13 are all made of conductive metal. During installation, the piston 301 rotates, and the push rod 304 descends, causing... The sealing plug 305 presses against one end of the safety valve 3 to maintain a sealing effect. The first spring 302 is stretched, and then the locking bar 303 is manually rotated to lock the sealing plug 305 a second time to prevent air leakage. When the ambient humidity is high, the adsorbed gas contains a certain amount of moisture. The copper plate installed on the top of the active core 301 can be connected to a wire to supply current to the filter element 21. The filter element 21 is an activated carbon composition. When it encounters current, it generates heat. This heat reduces the humidity in the gas, improves the cleanliness of the filter element 21 surface, and enhances the filtration effect.

[0023] Furthermore, a gas distribution chamber 4 is fixedly installed in the middle of the air cylinder 1. A duct 10 is opened inside the gas distribution chamber 4, and the duct 10 is connected to the air cylinder 1. Multiple gas distribution holes 103 are opened on the air cylinder 1. A venting area 101 is opened at the other end of the air cylinder 1. A second spring 8 is fixedly connected to one side of the connecting cylinder 2. A baffle 9 is fixedly connected to one end of the second spring 8. A sealing ring 901 is fixedly installed on the outer ring of the baffle 9. The sealing ring 901 is slidably connected to the air cylinder 1. When the driver presses the brake and inflates the air cylinder 1, the gas is filtered by the filter element 21 and then flows against the baffle 9, pushing the gas... The baffle 9 slides inside the air cylinder 1, and the second spring 8 is compressed, so that the sealing ring 901 is located in the middle of the venting zone 101. There is a redundant part between the sealing ring 901 and the venting zone 101 that allows gas to pass through. When the second spring 8 is compressed, the gas inside the air cylinder 1 passes through the redundant part of the venting zone 101, crosses the outer ring of the sealing ring 901, and enters the other end of the venting zone 101, thereby discharging the filtered gas through the connecting cylinder 2 into the outlet pipe 201. The function of the second spring 8 is to reduce the initial flow rate of the filtered gas and reduce the risk of gas backflow.

[0024] Furthermore, a rotating ring 11 is rotatably connected inside the middle of the air cylinder 1. The rotating ring 11 has multiple annular air passage holes 1101. Multiple protrusions are fixedly installed on the inner ring of the rotating ring 11, and a counter-protrusion that mates with the protrusions is fixedly installed on the outer ring of the sealing ring 901. The sealing ring 901 is linearly slidably connected to the air cylinder 1 via the counter-protrusions. The diameter of the air passage holes 1101 is equal to that of the air distribution holes 103. When the sealing ring 901 moves during air intake, the counter-protrusions follow the movement of the sealing ring 901, contacting the protrusions and causing the protrusions to drive the rotating ring 11 to rotate on the air cylinder 1, thus allowing air to pass through the rotating ring 11. The orifice 1101 and the air distribution orifice 103 correspond to each other, allowing the air distribution orifice 103 to backflush the depressurized gas from the air cylinder 1 into the duct 10. The gas enters the inside of the air cylinder 1 through the duct 10 and is close to the motor 5, further reducing the discharge pressure of the safety valve. After the control valve gas tank is full of gas, the air cylinder 1 stops entering gas. When the second spring 8 resets, the anti-protrusion on the sealing ring 901 contacts the protrusion again, allowing the rotating ring 11 to block the air distribution orifice 103 again, preventing gas from entering the outlet pipe 201 through the air cylinder 1 during idle time, thereby contaminating the control valve pipeline.

[0025] Furthermore, a sealing head 12 is sleeved on the output shaft of motor 5. Multiple gas channels 1202 are opened on the sealing head 12. The bottom of the carrier plate 13 abuts against the sealing head 12, and the sealing head 12 and the air cylinder 1 are snapped together. A cleaning ring 19 is slidably connected to the outer ring of each filter element 21. Multiple extension rods 18 are fixedly connected to the bottom of the cleaning ring 19. A push plate 20 is fixedly connected between the bottoms of the multiple extension rods 18. A piston 2001 is fixedly connected to the bottom of the push plate 20. The push plate 20, piston 2001, and sealing head 12 are connected together. The dimensions of the gas channel 1202 are matched; the gas channel 1202 is a two-section channel, the inner circle of the top section matches the outer circle of the push plate 20, and the bottom section matches the outer circle of the piston 2001. When the gas drives the piston 2001 to rise, the dirt that falls on the push plate 20 will stay and adhere around the push plate 20, and will not fall on the piston 2001 that is in direct contact with the gas. Therefore, the movement of the gas-driven piston 2001 is not affected. The specific implementation method is described in detail below. The bottom of the sealing head 12 is detachably connected to a discharge plate 1201, which is a replaceable sealing gasket made of fluororubber with a Shore hardness of 70A±5. The initial position of the pusher plate 20 is flush with the bottom of the sealing head 12, and the bottom of the cleaning ring 19 is adjacent to the top of the sealing head 12. After the gas vent 103 backflushes the depressurized gas from the gas cylinder 1 into the duct 10, the gas near the motor 5, with the pressure ensuring that the backflush gas is sprayed out through the channel between the pusher plate 20 and the sealing head 12, can accurately act on the windward side of the filter hole 17, thereby causing the filter hole 17 to oscillate slightly, further agitating the particles attached to the filter element 21. And when the backflush gas passes through the gas channel 1202 of the sealing head 12... During the process, the piston 2001 is first driven to rise, pushing the pusher 20 from the bottom of the sealing head 12 to its top. This causes the pusher 20 to move the extension rod 18, allowing the cleaning ring 19 to scrape off structural dirt from the surface of the filter element 21. The cleaning ring 19 and the pusher 20 have their own weight. As the cleaning ring 19 descends, it scrapes off particles from the filter element 21, placing them at the bottom of the cleaning ring 19. The cleaning ring 19 eventually returns to its initial state. As the cleaning ring 19 continues to descend, the dirt scraped from the bottom of the cleaning ring 19 falls onto the pusher 20. Thus, as the pusher 20 repeatedly rises and falls, it carries the dirt into the gas passage of the sealing head 12. (See attached diagram.) Figure 7 As shown, there is a discharge plate 1201 between the gas passage 1202 and the sealing head 12 for temporarily storing dirt. During the process of multiple air intake and shut-off of the air cylinder 1, the push plate 20 repeatedly rises and falls, which can push the dirt to the top of the discharge plate 1201 through the push plate 20. Therefore, the safety valve 3 can clean the filtered impurities in time when it is working continuously, which can improve the service life of the entire valve body and avoid the trouble of frequently cleaning the valve body in a short period of time.

[0026] Workflow: According to the above installation method and attachments Figure 2The structural style of each component is described, and the positional relationship of any component in the device will not be repeated here. First, connect the air cylinder 1 and the connecting cylinder 2 to the relevant pipes of the car. Then, when gas enters one end of the air cylinder 1, the gas passes through the first filter plate 6 and enters the filter cartridge 16. During this process, the drive motor 5 rotates. When the motor 5 rotates, it drives the carrier plate 13 to rotate. When the carrier plate 13 rotates, each filter cartridge 16 rotates on the carrier plate 13, and the filter element 21 filters the incoming gas. Simultaneously, as the filter cartridge 16 rotates, the first gear 14 and the second gear 15 engage with the second gear ring 23 and the first gear ring 22 respectively, causing the filter cartridge 16 to rotate in both directions. This allows larger particles attached to the filter cartridge 16 to be centrifuged out, increasing the surface area of ​​the filter cartridge 16 through which gas passes. After the gas is filtered, it passes through the second filter plate 7 and is fed onto the baffle 9, causing the baffle 9 to compress the second spring 8. When the baffle 9 is in the venting zone 101, the gas passes through the venting zone 101 and enters the continuous flow path. Inside the receiving cylinder 2, the filtered gas is conveniently used by the car. The backflushing gas comes into contact with the sealing ring 901 and the rotating ring 11. The rotating ring 11 rotates, introducing part of the filtered gas into the backflushing duct 10. The gas enters the inside of the air cylinder 1 through the duct 10 and then enters the bottom of the sealing head 12. After backflushing, the gas drives the piston 2001 to rise. During the rise, the piston 2001 drives the push plate 20 to rise, thereby raising the cleaning ring 19 from the bottom of the filter element 21 to the top of the filter element 21. This effectively removes impurities from the surface of the filter element 21. After the impurities are scraped to the bottom of the cleaning ring 19, they fall to the top of the push plate 20 due to their own weight. When the device is not in use, since no gas enters the device and the cleaning ring 19 has its own weight, the cleaning ring 19 automatically returns to its initial position. When the cleaning ring 19 falls freely to its initial position, it will generate a certain vibration, shaking the dirt on the cleaning ring 19 to the top of the push plate 20. Further implementation methods are described below: During a single gas input, as shown in the attached image. Figure 11 - Appendix Figure 12As shown, the top of the sealing head 12 itself has multiple recessed areas (shaped like an inverted cone), and the top of the gas channel 1202 has a channel, allowing the gas channel 1202 to connect with the redundant space above the unloading plate 1201 through the channel. These are all characteristic structures of the sealing head 12 itself. The height of the channel on the gas channel 1202 exceeds the height of the pusher plate 20 after it rises to its limit position. Other related structures will not be described in detail here. When the carrier plate 13 and the sealing head 12 are combined, the device opens... When the air is first introduced, the gas contacts the surface of the filter cartridge 16, passes through the filter hole 17, and enters the filter element 21. At this time, the cleaning ring 19 is located at the bottom of the filter element 21. In order to allow the extension rod 18 to move, the bottom of the filter cartridge 16 is designed to be open. Gas with a certain pressure can enter the surface of the filter element 21, and can also pass through the filter cartridge 16 and enter the bottom of the filter cartridge 16 along the surface of the filter element 21. This allows a small amount of gas to enter the gas channel 1202, thereby blowing away the dirt that falls on the top of the push plate 20, making it easier for the dirt to spread on the top of the push plate 20.

[0027] Immediately after the filter element 21 filters the measured amount of gas, the valve on the gas cylinder 1 closes, preventing gas from entering the cylinder. This allows the piston 2001 to rise without resistance, and the baffle 9 begins to move, introducing the filtered gas into the connecting cylinder 2. During this process, the gas backflows to the bottom of the sealing head 12, pushing the piston 2001 upward. The pusher 20 carries the dirt upward, causing it to come into contact with the bottom of the carrier plate 13 and sink into the recessed area of ​​the sealing head 12. When there is enough dirt, the pusher 20 will squeeze the dirt between the carrier plate 13 and the recessed area of ​​the sealing head 12 during its upward movement. Subsequently, with each upward movement of the pusher 20, the dirt on it will squeeze the dirt inside the recessed area. This will not affect the filtration effect of filter element 21, and some dirt will always remain on push plate 20. The periodic inflation of air cylinder 1 can repeatedly scrape the dirt off filter element 21 by cleaning ring 19, making the dirt layer on push plate 20 thicken again. When cleaning ring 19 repeatedly scrapes too much dirt off filter element 21, the dirt fills the recessed area and gradually compacts. When push plate 20 moves upward again, the dirt can no longer enter the recessed area. When push plate 20 rises again, the dirt on the top of push plate 20 is blocked by the dirt in the recessed area, so that the dirt on the top of push plate 20 can only be squeezed to the top of discharge plate 1201 through the hole at the top of air channel 1202.

[0028] For example, see attached Figure 13As shown, when the driver continuously applies the brakes, the gas consumption is relatively large. Therefore, the gas replenishment time inside the gas tank needs to be extended. When the gas tank is repeatedly replenished, the time for the gas to act on the filter cartridge 16 is slightly longer than before. Meanwhile, the cleaning ring 19 is at the highest point inside the filter cartridge 16. Because the cleaning ring 19 needs a certain amount of time to fall, and the interval between gas tank replenishments is too short, the cleaning ring 19 fails to return to its initial position in time. The pusher plate 20 is also close to the channel. Since there is no cleaning ring 19 at the bottom of the filter cartridge 16 to act as an obstruction, a certain amount of pressure is maintained. The gas acts directly on the top of the push plate 20 through the hollow first gear 14, and the gas can also act on the recessed area, thereby cleaning the dirt accumulated in the recessed area and not compacted to the top of the push plate 20. The gas directly pushes the dirt onto the discharge plate 1201. During this process, the gas contacts the top of the push plate 20, applies pressure to the push plate 20, and promotes the speed of the cleaning ring 19 falling back, so that the push plate 20 can rise quickly again by the backflow gas when the next air intake is carried out, thereby collecting dirt in real time.

[0029] When encountering humid gas, the active core 301 can be energized, causing the filter element 21 to heat up and heat the surrounding gas, preventing dirt from sticking to the filter element 21. At the same time, the cleaning ring 19 can clean the filter element 21, preventing blockage, improving the filter's ability to filter gas, and extending the service life of the car valve.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A backflushing mechanism for preventing clogging of a fluid filter, comprising an air cylinder (1), characterized in that: One end of the air cylinder (1) is fixedly connected to a connecting cylinder (2), and an air outlet pipe (201) is fixedly connected to the connecting cylinder (2). A filter area (102) is opened inside the air cylinder (1). A safety valve (3) is fixedly installed on the air cylinder (1). A poker rod (304) is movably connected to the inside of the safety valve (3). A carrying plate (13) is rotatably connected to one end of the poker rod (304). Multiple filter cylinders (16) are rotatably connected to the carrying plate (13). Multiple filter holes (17) are opened on each filter cylinder (16). One end of the filter cylinder (16) is fixed. A first gear (14) is installed, and a second gear (15) is fixedly installed at the other end of the filter cylinder (16). The first gear (14) and the second gear (15) are rotatably connected to the carrier plate (13). A filter element (21) can be detachably connected to each of the first gears (14). A motor (5) is detachably connected to the outside of the air cylinder (1). The output shaft of the motor (5) is connected to the carrier plate (13). Multiple first toothed rings (22) are suspended at the bottom of the push rod (304). Multiple second toothed rings (23) are fixedly installed inside the air cylinder (1). The number of the first toothed ring (22) and the second toothed ring (23) is at least 4. The first toothed ring (22) is arranged next to the top of the carrier plate (13). The positions of the first toothed ring (22) and the second toothed ring (23) inside the air cylinder (1) are staggered. When the carrier plate (13) rotates, the first gear (14) and the second toothed ring (23) come into contact, and the first gear (14) rotates on the carrier plate (13). After the first gear (14) and the second toothed ring (23) separate, the second gear (15) immediately meshes with the first toothed ring (22), so that the rotation direction of the second gear (15) is opposite to the rotation direction of the first gear (14). A first filter plate (6) is fixedly installed on one side of the filtration zone (102), and a second filter plate (7) is fixedly installed on the other side of the filtration zone (102). The first filter plate (6) and the second filter plate (7) are parallel to each other and arranged opposite to each other. A transition zone (24) for gas flow and exchange is formed between the first filter plate (6) and the second filter plate (7). Multiple tiny air leakage holes are evenly opened on the first filter plate (6) and the second filter plate (7), and their total area accounts for half of the effective surface area of ​​the first filter plate (6) and the second filter plate (7). The safety valve (3) is threaded with a live core (301), the live core (301) and the push rod (304) are fixedly connected together, the push rod (304) is fixedly connected with a sealing plug (305) in the middle, the sealing plug (305) and the safety valve (3) are connected with a first spring (302), and the safety valve (3) is threaded with a locking strip (303) for locking the push rod (304). A gas distribution chamber (4) is fixedly installed in the middle of the air cylinder (1). A duct (10) is opened inside the gas distribution chamber (4). The duct (10) is connected to the air cylinder (1). A plurality of gas distribution holes (103) are opened on the air cylinder (1). A venting area (101) is opened at the other end of the air cylinder (1). A second spring (8) is fixedly connected to one side of the connecting cylinder (2). A baffle (9) is fixedly connected to one end of the second spring (8). A sealing ring (901) is fixedly installed on the outer ring of the baffle (9). The sealing ring (901) is slidably connected to the air cylinder (1). The air cylinder (1) is rotatably connected to a rotating ring (11) in the middle. The rotating ring (11) has multiple air passage holes (1101) in a ring shape. Multiple protrusions are fixedly installed on the inner ring of the rotating ring (11). The outer ring of the sealing ring (901) has a counter-protrusion that cooperates with the protrusions. The sealing ring (901) is linearly slidably connected to the air cylinder (1) through the counter-protrusion. The diameter of the air passage hole (1101) is equal to that of the air distribution hole (103). A sealing head (12) is sleeved on the output shaft of the motor (5). Multiple gas channels (1202) are provided on the sealing head (12). The bottom of the carrier plate (13) abuts against the sealing head (12), and the sealing head (12) and the air cylinder (1) are snapped together. A cleaning ring (19) is slidably connected to the outer ring of each filter element (21). Multiple extension rods (18) are fixedly connected to the bottom of the cleaning ring (19). A push plate (20) is fixedly connected between the bottoms of the multiple extension rods (18). A piston (2001) is fixedly connected to the bottom of the push plate (20). The size of the push plate (20) matches the size of the piston (2001) and the gas channel (1202) of the sealing head (12). The bottom of the sealing head (12) is detachably connected to the unloading plate (1201). The top of the sealing head (12) is provided with multiple recessed areas. The top of the gas channel (1202) has a channel, allowing the gas channel (1202) to communicate with the redundant space above the unloading plate (1201) through the channel. The height of the channel on the gas channel (1202) exceeds the height of the pusher (20) after it rises to the limit position.

2. The backflushing mechanism for preventing clogging of a fluid filter according to claim 1, characterized in that: The top of the live core (301) is fitted with a copper sheet, and the material of the sting rod (304), the live core (301), and the carrier plate (13) are all made of conductive metal.

3. The backflushing mechanism for preventing clogging of a fluid filter according to claim 2, characterized in that: The unloading plate (1201) is a replaceable sealing gasket made of fluororubber with a Shore hardness of 70A±5.

4. The backflushing mechanism for preventing clogging of a fluid filter according to claim 3, characterized in that: Each of the filter holes (17) is tilted on the filter cylinder (16) at an angle of 15° to 30°.

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