A high flow rate low flow filter valve and flow control device therefor

Abstract

The application relates to the technical field of filtering valves, in particular to a high-flow-rate small-flow-rate filtering valve and a flow control device thereof. The filtering valve comprises a base, two filtering parts installed on the top of the base and a valve installed between the two filtering parts. The filtering part comprises a cleaning part for cleaning the impurities blocked by the filter cartridge and a pushing assembly for assisting in discharging the liquid containing impurities on the upper end of the filter cartridge. The pushing assembly and the cleaning part are in linkage action. The cleaning effect is improved through the cooperation of the inner wall scraping and the outer wall backflushing. The liquid can be continuously pressed into the sleeve while cleaning, so as to quickly discharge the liquid containing impurities on the upper end of the lifting column in the filter cartridge. The flow control device comprises a differential pressure acquisition module and a regulating and controlling assembly for regulating the water outlet rate of the T-shaped outlet pipe. The flow area can be self-adaptively regulated according to the blocking degree of the filter cartridge, the flow resistance rise caused by the blocking of the filter cartridge is offset, and the set small flow rate is stably outputted throughout the process.

Description

Technical Field

[0001] This invention relates to the field of filter valve technology, specifically a high-flow-rate, low-flow-rate filter valve and its flow control device. Background Technology

[0002] Precision delivery of small flow rates is a core operating condition in fields such as pure water preparation, pharmaceutical formulation, chemical reagent formulation, and precision cooling circulation. These operating conditions generally require the medium to be delivered continuously at a high flow rate and a stable small flow rate. At the same time, there are strict requirements for the cleanliness of the medium. Therefore, it is necessary to connect a filter valve in series in the delivery pipeline to intercept particulate impurities in the medium.

[0003] Currently, most conventional filter valves have a single-channel filter element structure. When cleaning a clogged filter element, the machine needs to be stopped, which cannot meet the needs of continuous production. In addition, frequent start-stop operations can cause pipeline pressure fluctuations, affecting the stability of small flow rates. Furthermore, existing filter valves can only clean impurities trapped in the valve element from one side, which limits the cleaning effect on deeply embedded impurities. The high filter cake residue rate leads to insufficient flow recovery rate after cleaning and a short cleaning cycle. Summary of the Invention

[0004] The purpose of this invention is to provide a high-flow-rate, low-flow-rate filter valve and its flow control device to solve the problems in the prior art.

[0005] The objective of this invention can be achieved through the following technical solutions: A high-flow-rate, low-flow-rate filter valve includes a base, two filter sections fixedly mounted on the top of the base, and a valve installed between the two filter sections. The valve consists of a T-shaped inlet pipe, a T-shaped outlet pipe, a three-way valve installed at the two outlet ends of the T-shaped inlet pipe, and a two-way valve installed at the two inlet ends of the T-shaped outlet pipe. The two three-way valves and the two two-way valves are respectively connected to the filter section at opposite ends. The filter section includes a cover, with two isolation rings fixedly installed inside the cover. The outside of the cover is connected to an inlet pipe and an outlet pipe that are respectively connected to a three-way valve and a two-way valve. A filter cylinder is fixedly installed inside the cover at the position corresponding to the central through hole of the isolation ring. The filtration unit also includes a cleaning unit for cleaning impurities trapped in the filter cartridge and a pushing component for assisting in discharging liquid containing impurities from the upper end of the filter cartridge. The pushing component and the cleaning unit are linked together.

[0006] As a preferred embodiment of the high-flow-rate, low-flow-rate filter valve of the present invention, the cleaning part includes an outer ring plate and an inner ring plate fixed at the bottom of the cover cylinder and arranged concentrically. The inner ring plate has four slots evenly distributed in a ring on its circumferential side. A cross support plate is movably inserted between the four slots. An air bladder is fixedly connected between the inner ring plate and the outer ring plate. The two ends of the air bladder are respectively fixedly connected to the isolation ring located at the lower end and the end of the cross support plate passing through the slot.

[0007] As a preferred embodiment of the high-flow-rate, low-volume filter valve of the present invention, wherein: a plurality of U-shaped tubes connecting the airbag and the outer ring plate are fixedly provided between the cover and the outer ring plate, and an air inlet pipe connecting the airbag is also fixedly provided on the outer side of the outer ring plate; an arc cover is fixedly provided inside the cover at a position between two isolation rings, which is directly opposite to each U-shaped tube; a plurality of exhaust pipes are connected to the outer side of the arc cover; and a one-way valve is installed on the air inlet pipe and each exhaust pipe.

[0008] As a preferred embodiment of the high flow rate, low flow rate filter valve of the present invention, wherein: the inner ring plate is provided with a lifting column concentrically arranged with the filter cylinder, the top end of the lifting column is movably inserted into the filter cylinder, two limiting rings are fixedly sleeved on the outer side of the bottom end of the lifting column, the cross support plate is movably sleeved on the outside of the lifting column at the position between the two limiting rings, and a cylindrical groove is also provided at the bottom end of the lifting column, and a spiral guide groove is provided on the inner side of the cylindrical groove.

[0009] As a preferred embodiment of the high-flow-rate, low-volume filter valve of the present invention, the cleaning unit further includes an electric push rod and an L-shaped rod fixed to the top of the base. Both the electric push rod and the L-shaped rod are located inside the cylindrical groove. An annular block with the same inner diameter as the cylindrical groove is fixedly sleeved on the outside of the L-shaped rod. A vertical rod is fixedly installed at the top of the inner cavity of the cylindrical groove. An annular strip is fixedly sleeved on the outside of the telescopic ends of the vertical rod and the electric push rod. The vertical rod and the telescopic ends of the electric push rod are rotatably connected by a bearing. A limiting cover frame is sleeved on the outside of the two annular strips.

[0010] As a preferred embodiment of the high-flow-rate, low-flow-rate filter valve of the present invention, the pushing assembly includes a sleeve fixedly installed on the upper end of the cover cylinder. One end of the sleeve extending into the inside of the cover cylinder is in communication with the inside of the filter cylinder, and a push post is movably inserted into the end of the sleeve that is in communication with the inside of the filter cylinder. An overflow pipe is connected to the other end of the sleeve and the area inside the cover cylinder located between two isolation rings. A ring is fixedly provided inside the sleeve, and a cylinder with one end fixedly connected to the push post is movably inserted into the ring. A spring is fixedly connected between the end of the cylinder away from the push post and the end face of the inner cavity of the sleeve.

[0011] As a preferred embodiment of the high-flow-rate, low-flow-rate filter valve of the present invention, the three-way valve and the two-way valve located on the same side cooperate with the filter section on the corresponding side to form a conveying channel with a filtering function. The two conveying channels share a water inlet and a water outlet, and the ball valve cores of the three-way valve and the two-way valve located on the same side share a valve stem. The on / off state of the two conveying channels is alternately set to open and close.

[0012] As a preferred embodiment of the high flow rate, low flow rate filter valve of the present invention, wherein: a linkage adjustment assembly for synchronously controlling two valve stems is provided between the valve and the base, the linkage adjustment assembly includes a swing arm fixedly sleeved in the middle of the two valve stems, a connecting frame is provided between the two swing arms, the connecting frame is composed of a horizontal plate and round rods fixed at the bottom of both ends of the horizontal plate, and the two round rods are rotatably connected to the corresponding swing arms through bearings.

[0013] As a preferred embodiment of the high-flow-rate, low-flow-rate filter valve of the present invention, the linkage adjustment assembly further includes a locking component for restricting the state of the valve stem. The locking component includes a base fixed to the top of the base and a T-shaped column rod that is movably inserted through the middle of the horizontal plate. A spring is fitted on the outer side of the upper end of the T-shaped column rod, which is fixedly connected to the upper side of the horizontal plate and the upper step surface of the T-shaped column rod. An arc groove is opened on the top of the base, and locking holes are opened at both ends inside the arc groove. The lower end of the T-shaped column rod is slidably connected inside the arc groove.

[0014] The present invention also provides a flow control device for the above-mentioned high flow rate and low flow rate filter valve, including a differential pressure acquisition module and a control component for adjusting the water flow rate of the T-shaped outlet pipe. The differential pressure acquisition module includes pressure taps respectively provided on the T-shaped inlet pipe and the T-shaped outlet pipe, and differential pressure sensors are connected to the two pressure taps through pressure taps. The control component includes a mounting frame, a worm gear, and an orifice plate installed on the water outlet section of the T-shaped outlet pipe. A worm gear for driving the worm gear to rotate is installed on the mounting frame. A water passage hole is also opened on the worm gear at the position corresponding to the perforation on the orifice plate. The water outlet rate is adjusted by utilizing the misalignment between the water passage hole and the perforation on the orifice plate.

[0015] The beneficial effects of this invention are: 1. This invention allows two independent filter channels to share a single inlet and outlet, and enables the two filter channels to operate alternately, one open and one closed, forming an alternating switching structure. This ensures that while cleaning the clogged filter cartridge, the other filter channel continues to deliver the medium without needing to stop the machine for cleaning. This completely solves the problem that traditional filter valves require production to be interrupted when cleaning, ensuring the continuous operation of high-flow-rate, low-volume precision systems and significantly improving delivery efficiency and production continuity. 2. This invention utilizes a spiral guide groove in conjunction with an L-shaped rod to convert the linear motion of the lifting column into a rotary scraping motion, allowing the lifting column to adhere to the inner wall of the filter cartridge for full-area scraping of trapped impurities. At the same time, the cross support plate, which moves synchronously upward with the lifting column, is linked to the compressed airbag to generate a reverse airflow that backflushs and peels away deeply embedded impurities from the outer cavity of the filter. Through the synergistic effect of inner wall scraping and outer wall backflush, the cleaning effect is improved. 3. This invention utilizes the rising internal pressure of the outer cavity of the filter during the cleaning process to continuously press the liquid in the area into the sleeve. The continuously pressed liquid overcomes the tension of the spring to push the push column out of the sleeve, thereby pushing the impurity-containing liquid inside the filter cylinder located at the upper end of the lifting column to be discharged quickly, minimizing the amount of impurity-containing liquid remaining at the upper end of the filter cylinder, and achieving the purpose of reducing the cleaning frequency. 4. By adopting a parallelogram linkage structure, this invention can realize the on / off switching of two valves with a single push, which is simple and efficient to operate. In addition, after switching to the position, it automatically locks and positions the valve stem. 5. This invention adopts a staggered throttling structure of orifice plate and worm gear disk, and is combined with real-time acquisition of inlet and outlet differential pressure. It can adaptively adjust the flow area according to the degree of filter cartridge blockage, offset the increase in flow resistance caused by filter cartridge blockage, and output a stable set small flow rate throughout the process. Attached Figure Description

[0016] The invention will now be further described with reference to the accompanying drawings.

[0017] Figure 1 This is a first-view overall structural diagram of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective; Figure 3 This is a diagram of the valve of the present invention. Figure 4 This is a partial structural diagram of the T-shaped outlet pipe of the present invention; Figure 5 This is a schematic diagram of the base structure of the present invention; Figure 6 This is a schematic diagram of the overall structure of the filter section of the present invention; Figure 7 This is an overall cross-sectional view of the filter section of the present invention; Figure 8 This is the present invention. Figure 7 Enlarged view of the structure of section A in the middle; Figure 9 This is a partial cross-sectional view of the filter section of the present invention; Figure 10 This is a partial unfolded view of the lower end portion of the filter section of the present invention; Figure 11 This is a schematic diagram of the cleaning component structure of the present invention; Figure 12 This is a cross-sectional view of the cleaning component of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Base; 2. Filter section; 21. Cover; 22. Inlet pipe; 23. Outlet pipe; 24. Isolation ring; 25. Filter cylinder; 26. Pushing assembly; 261. Sleeve; 262. Push column; 263. Overflow pipe; 264. Ring sleeve; 265. Cylindrical; 266. Spring 1; 27. Outer ring plate; 28. Inner ring plate; 29. ​​Lifting column; 210. Restriction ring; 211. Cross support plate; 212. Electric push rod; 213. Vertical rod; 214. Ring bar; 215. Restriction cover frame; 21 6. Spiral guide groove; 217. L-shaped rod; 218. Ring block; 219. Airbag; 220. U-shaped tube; 221. Arc cover; 222. Exhaust pipe; 223. Intake pipe; 3. Valve; 31. T-shaped inlet pipe; 32. T-shaped outlet pipe; 33. Three-way valve; 34. Two-way valve; 35. Pressure tap; 36. Orifice plate; 37. Worm gear disc; 38. Worm; 4. Linkage adjustment assembly; 41. Swing arm; 42. Connecting frame; 43. T-shaped column rod; 44. Spring II; 45. Base; 46. Arc groove; 47. Locking hole. 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] The high-flow-rate, low-volume filter valve of this invention is a type of water circuit accessory product in the water-saving technology industry, belonging to a part of fluid distribution valves. Among them, precise control of low-flow-rate fluid and impurity filtration is a key link in the process of refined water-saving transportation. This filter valve has both continuous low-flow-rate regulation and precise media filtration functions, and can maintain stable continuous transportation of micro-volume fluid under high cross-sectional flow velocity conditions. Example

[0021] Refer to the instruction manual appendix Figures 1-3 This embodiment is the first embodiment of the present invention, which provides a high flow rate and low flow rate filter valve, including a base 1, two filter parts 2 symmetrically fixedly installed on the top of the base 1, and a valve 3 fixedly installed between the two filter parts 2. The whole adopts a dual-path parallel one-in-use and one-backup architecture. The two sets of filter channels share the same inlet and outlet, and can be switched on and off alternately to achieve online self-cleaning without stopping the machine, which is suitable for high flow rate and low flow rate continuous conveying conditions.

[0022] The valve 3 consists of a T-shaped inlet pipe 31, a T-shaped outlet pipe 32, two three-way valves 33, and two two-way valves 34. A three-way valve 33 is installed at each of the two outlet ends of the T-shaped inlet pipe 31, and a two-way valve 34 is installed at each of the two inlet ends of the T-shaped outlet pipe 32. The three-way valves 33 and two-way valves 34 located on the same side, near the corresponding end of the filter section 2, are respectively connected to the inlet pipe 22 and outlet pipe 23 of the filter section 2. Thus, the three-way valves 33, the filter section 2, and the two-way valves 34 on the same side... The two sets of flow channels are arranged in parallel. At the same time, the ball valve cores of the three-way valve 33 and the two-way valve 34 on the same side share a valve stem, so that when a single valve stem rotates, the on and off state of the flow channel on the same side can be switched synchronously. The on and off state of the two sets of flow channels is always one open and one closed, working alternately. In addition, a linkage adjustment component 4 is set between the base 1 and the valve 3 to synchronously drive the two valve stems to rotate in opposite directions, realizing one-key switching and position locking of the two sets of flow channels.

[0023] Furthermore, such as Figure 3 and Figure 5 As shown, the linkage adjustment component 4 includes two swing arms 41, which are fixedly sleeved in the middle of two valve stems respectively. A connecting frame 42 is provided between the two swing arms 41. The connecting frame 42 consists of a horizontal plate and round rods fixed at the bottom of both ends of the horizontal plate. The two round rods are rotatably connected to the free ends of the corresponding swing arms 41 through bearings, forming a parallelogram linkage mechanism. By simply pushing the horizontal plate of the connecting frame 42 laterally, the two swing arms 41 can be driven to swing synchronously in opposite directions, and the two valve stems can be driven to rotate synchronously in opposite directions, so as to complete the switching of the two sets of conveying channels at one time.

[0024] Furthermore, the linkage adjustment component 4 also includes a locking component for locking the valve stem position after switching. The locking component includes a base 45 fixed to the top of the base 1 and a T-shaped column 43 movably passing through the middle of the horizontal plate. A second spring 44 is sleeved on the outer side of the upper end of the T-shaped column 43. The two ends of the second spring 44 are respectively fixedly connected to the upper surface of the horizontal plate and the stepped surface of the upper end of the T-shaped column 43. An arc groove 46 is opened on the top of the base 45. Both ends of the arc groove 46 are provided with locking holes 47. The lower end of the T-shaped column 43 is slidably connected to the inside of the arc groove 46. When the lower end of the T-shaped column 43 is in the state of being inside the locking hole 47, the second spring 44 is still in the stretched state, which can improve the stability of the lower end of the T-shaped column 43 being inserted into the locking hole 47.

[0025] It should be noted that during the switching of the two sets of conveying channels, the T-shaped column 43 is lifted upwards, allowing its lower end to disengage from the locking hole 47. During this process, the second spring 44 is stretched and stored. Then, the connecting frame 42 is pushed laterally to slide along the arc groove 46, thereby driving the swing arm 41 and the valve stem to rotate. After the flow channel is switched into place, the T-shaped column 43 is released, and the second spring 44 returns to its original position, pushing the T-shaped column 43 downwards. The lower end is locked into the corresponding locking hole 47, completing the valve stem position locking. This can resist the pressure pulsation and vibration impact of high-velocity media, and prevent the valve core position from shifting, thereby causing flow fluctuations. Example

[0026] Refer to the instruction manual appendix Figure 6 , Figure 7 This embodiment is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the filter section 2 includes a cover 21. Two horizontally parallel isolation rings 24 are fixedly installed inside the cover 21. The two isolation rings 24 divide the interior of the cover 21 into three parts from top to bottom: an upper cavity, a middle filter cavity, and a lower cavity. A filter cylinder 25 is coaxially fixed inside the middle filter cavity. The upper and lower ends of the filter cylinder 25 are respectively sealed and inserted into the central through holes of the two isolation rings 24, thus dividing the middle filter cavity into three parts. The inner cavity and the outer cavity of the filter are connected. The side wall of the cover 21 is provided with an inlet pipe 22 and an outlet pipe 23. The inner end of the inlet pipe 22 is connected to the inner cavity of the filter cylinder 25, and the outer end is connected to the three-way valve 33 on the corresponding side. The inner end of the outlet pipe 23 is connected to the middle filter cavity on the outer side of the filter cylinder 25, and the outer end is connected to the two-way valve 34 on the corresponding side. During operation, the medium enters the interior of the filter cylinder 25 through the inlet pipe 22 and penetrates the filter cylinder 25 radially from the inside to the outside to complete the interception of impurities. After filtration, the clean medium flows into the outer cavity and flows out through the outlet pipe 23.

[0027] In addition, the filter unit 2 also includes a cleaning unit for cleaning the impurities trapped in the filter cartridge 25 and a pushing component 26 for assisting in the discharge of liquid containing impurities from the upper end of the filter cartridge 25. The two work together to achieve deep self-cleaning of the offline filter cartridge.

[0028] Furthermore, such as Figures 6-10As shown, the cleaning section is located at the bottom of the cover 21, and has the dual cleaning functions of inner wall scraping and outer wall backflushing. The cleaning section specifically includes an outer ring plate 27 and an inner ring plate 28 that are concentrically arranged at the bottom of the cover 21. The inner ring plate 28 is located inside the outer ring plate 27. The inner ring plate 28 has four evenly distributed grooves on its circumferential side. A cross support plate 211 is provided between the four grooves. The four arms of the cross support plate 211 pass through the four grooves and can slide up and down along the grooves. An airbag 219 is fixed in the annular space formed between the inner ring plate 28 and the outer ring plate 27. The upper end of the airbag 219 is fixed to the bottom surface of the lower isolation ring 24, and the lower end of the airbag 219 is fixed to the upper surface of the support arm of the cross support plate 211. The lifting and lowering of the cross support plate 211 can simultaneously compress or stretch the airbag 219.

[0029] Furthermore, multiple U-shaped tubes 220 are fixed between the cover 21 and the outer ring plate 27. One end of the U-shaped tube 220 is connected to the inner cavity of the airbag 219, and the other end extends into the middle filter chamber. An air inlet pipe 223 is also fixed on the outer side of the outer ring plate 27. The inner end of the air inlet pipe 223 is connected to the inner cavity of the airbag 219, and the outer end is connected to the outside. An arc cover 221 is fixed on the inner wall of the middle filter chamber at the position of the outlet of each U-shaped tube 220. Multiple exhaust pipes 222 are connected to the side of the arc cover 221 facing the filter cylinder 25. An air distribution plate can be added to the outlet end of each exhaust pipe 222 to diffuse the gas discharged from the exhaust pipe 222 towards the filter cylinder and increase the blowing range. A one-way valve is installed on the air inlet pipe 223 and each exhaust pipe 222 to ensure unidirectional airflow.

[0030] Furthermore, the inner ring plate 28 is provided with a lifting column 29 concentrically arranged with the filter cylinder 25. The top of the lifting column 29 is movably inserted into the filter cylinder 25. The outer wall of the lifting column 29 and the inner wall of the filter cylinder 25 are fitted with a clearance to form a scraping end face. In addition, to improve the cleaning effect, a brush section can be added to the upper outer side of the lifting column 29. Two limiting rings 210 are fixedly sleeved on the outer side of the bottom end of the lifting column 29. The cross support plate 211 is movably sleeved on the outside of the lifting column 29 between the two limiting rings 210. The thickness of the cross support plate 211 is equal to the minimum distance between the two limiting rings 210. During the lifting process, the lifting column 29 drives the cross support plate 211 to move up and down synchronously through the synchronously rising and falling limiting rings 210.

[0031] Furthermore, the bottom end of the lifting column 29 is provided with a cylindrical groove, and a spiral guide groove 216 is provided inside the cylindrical groove. The cleaning part also includes an electric push rod 212 (model DYTP450- / 110) and an L-shaped rod 217 fixed on the top of the base 1. Both the electric push rod 212 and the L-shaped rod 217 are located inside the cylindrical groove, and the horizontal section of the L-shaped rod 217 is slidably connected to the inside of the spiral guide groove 216. A ring block 218 is fixedly sleeved on the outside of the vertical section of the L-shaped rod 217. The outer diameter of the ring block 218 is adapted to the inner diameter of the cylindrical groove. A vertical rod 213 is fixedly installed at the top of the inner cavity of the cylindrical groove. The bottom end of the vertical rod 213 is rotatably connected to the telescopic end of the electric push rod 212 through a bearing. A ring bar 214 is fixedly sleeved on the outside of both the vertical rod 213 and the telescopic end of the electric push rod 212. A limiting cover frame 215 is sleeved on the outside of the two ring bars 214 to limit the relative axial displacement of the two and retain only the circumferential rotational freedom.

[0032] It should be noted that the height of the filter screen section on the filter cylinder 25 is defined as two-thirds of the upward stroke of the lifting column 29, and the upper end face of the lifting column 29 is set as a concave arc surface. When the lifting column 29 rises to its maximum height, the arc surface at the upper end of the lifting column 29 coincides with the inner wall of the liquid inlet pipe 22. During the cleaning process of the filter screen section on the filter cylinder 25, the extension end of the electric push rod 212 is extended to push the lifting column 29 upward along the axis. During this process, the spiral guide groove 216 and the horizontal section of the L-shaped rod 217 cooperate to convert the linear lifting motion into rotational motion, so that the lifting column 29 rises and rotates at the same time. The outer wall of the rotating column continuously scrapes the inner wall of the filter cylinder 25 to remove the attached filter cake and embedded impurities. Meanwhile, as the lifting column 29 rises, the cross plate 211, clamped by the two limiting rings 210, moves upward along the slot and uses the rising cross plate 211 to compress the airbag 219. After the gas inside the airbag 219 is compressed, it opens the one-way valve on the U-shaped tube 220 and blows through the U-shaped tube 220, arc cover 221, and exhaust pipe 222 towards the outer wall of the filter cartridge 25, forming a reverse airflow backflush, thereby peeling off the deeply embedded impurities and creating a two-way cleaning effect by scraping the inner wall. Similarly, when the electric push rod 212 retracts, the lifting column 29 moves downward to reset, and the airbag 219 stretches synchronously, forming a negative pressure inside and opening the one-way valve on the air intake pipe 223, drawing in outside air through the air intake pipe 223 to replenish the air supply for the next backflush.

[0033] Furthermore, such as Figure 7 and Figure 11 , Figure 12As shown, the pushing component 26 is disposed at the upper end of the cover cylinder 21 to assist in discharging the impurity-containing liquid accumulated at the upper end of the filter cylinder 25 and eliminate the dead corner of upper sludge accumulation. The pushing component 26 specifically includes a sleeve 261 fixedly installed at the upper end of the cover cylinder 21. One end of the sleeve 261 extends into the upper cavity of the cover cylinder 21 and communicates with the interior of the filter cylinder 25. A pusher 262 is movably inserted into the end of the sleeve 261 that communicates with the interior of the filter cylinder 25. The other end of the sleeve 261 is located at two isolation points with the interior of the cover cylinder 21. An overflow pipe 263 is connected to the area between the rings 24. A ring 264 is fixedly installed inside the sleeve 261. A cylinder 265 is movably inserted inside the ring 264, with one end fixedly connected to the push post 262. A spring 266 is fixedly connected between the end of the cylinder 265 away from the push post 262 and the end face of the inner cavity of the sleeve 261. When the spring 266 is in its natural state, the end face of the push post 262 away from the cylinder 265 coincides with the end face of the sleeve 261 connected to the filter cylinder 25.

[0034] It should be noted that the outer diameter of the push column 262 is defined to be smaller than the inner diameter of the corresponding inlet pipe 22, to ensure that the passively pushed push column 262 does not completely block the drainage process at the upper end of the filter cartridge 25. During normal filtration, the pressure in the outer chamber of the filter is stable, and spring 266 maintains the push column 262 in a stable position. Figure 12 The state shown does not affect the flow of the medium. However, during backwashing and cleaning, the increased pressure in the inner chamber of the filter will push the liquid containing impurities in the inner chamber of the filter upward and discharge it through the corresponding three-way valve 33. At the same time, as the air filling process proceeds, part of the liquid in the outer chamber of the filter will enter the inner chamber of the filter and be discharged, while the other part will be forced into the sleeve 261 through the overflow pipe 263 as the pressure in the outer chamber of the filter increases, thus completing the pre-filling of the initial cavity inside the sleeve 261. When the lifting column 29 rises to completely block the filter screen section on the filter cylinder 25, as the lifting column 29 continues to rise, the liquid containing impurities in the inner cavity of the filter continues to rise and be discharged. Meanwhile, the liquid inside the outer cavity of the filter will be discharged into the sleeve 261 in large quantities as the pressure in that area increases. As the liquid inside the sleeve 261 continues to increase, it will overcome the tension of the spring 266 to push the push column 262 out of the sleeve, assisting in the rapid discharge of the impurity-containing liquid inside the filter cylinder 25 located at the upper end of the lifting column 29, so as to minimize the amount of impurity-containing liquid remaining at the upper end of the filter cylinder 25 and achieve the purpose of reducing the cleaning frequency.

[0035] Refer to the instruction manual appendix Figure 3 , Figure 4 The present invention also provides a flow control device for the above-mentioned high-flow-rate, low-flow-rate filter valve, including a differential pressure acquisition module and a control component, for adaptively adjusting the water output rate according to the degree of filter blockage, and stabilizing the high-flow-rate, low-flow-rate output.

[0036] Furthermore, the differential pressure acquisition module includes pressure taps 35 respectively opened on the pipe walls of the inlet section of the T-shaped inlet pipe 31 and the outlet section of the T-shaped outlet pipe 32. The two pressure taps 35 are connected to a differential pressure sensor (model EJA110E-JMS4J-912EA) through pressure taps to detect the total static pressure difference between the valve inlet and outlet in real time, indirectly reflecting the degree of blockage of the current working filter cartridge.

[0037] Furthermore, the control component is installed on the outlet section of the T-shaped outlet pipe 32. Specifically, the control component includes a mounting frame, a worm gear disk 37, and an orifice plate 36, all mounted on the outlet section of the T-shaped outlet pipe 32. A worm 38 is rotatably mounted on the mounting frame, meshing with the gear teeth on the outer edge of the worm gear disk 37. Rotating the worm 38 drives the worm gear disk 37 to rotate around its axis. A water passage hole is also provided on the worm gear disk 37 at the position corresponding to the perforation on the orifice plate 36. The misalignment between the water passage hole and the perforation on the orifice plate 36 is used to adjust the water flow rate. To facilitate the installation of the control component, the outlet section of the T-shaped outlet pipe 32 can be designed as a two-section structure. The control component is installed between the two pipe sections, and bolts are used to lock the flanges between the opposite ends of the two pipe sections. The worm gear disk 37 is rotatably mounted to both pipe sections via bearings, and a shaft seal is applied at the junction. Simultaneously, the mounting frame is fixed to the flanges of the two pipe sections via an insertion connection.

[0038] It should be noted that during the adjustment of the water flow rate, the real-time differential pressure signal is transmitted to the control unit through a differential pressure sensor. When the filter cartridge gradually becomes clogged, the flow resistance increases, and the inlet and outlet pressure difference increases, the worm gear 38 is driven to rotate, increasing the flow area between the worm wheel disk 37 and the orifice plate 36 to compensate for the flow rate reduction caused by the increase in flow resistance. When the pressure difference decreases, the flow area is correspondingly reduced, maintaining a stable output flow rate throughout the process. Furthermore, the worm gear structure has self-locking properties (not shown in the attached figure, but refer to the existing worm gear self-locking design, which will not be elaborated here), which can avoid the opening drift caused by high flow rate pressure pulsation and ensure the accuracy of small flow rate adjustment.

[0039] The working principle of the above-mentioned high-velocity, low-flow-rate filter valve is as follows: In the initial state, the left filter channel is opened while the right filter channel is closed. At this time, during operation, the medium enters through the T-shaped inlet pipe 31, passes through the left three-way valve 33 and the inlet pipe 22, and enters the inner side of the left filter cylinder 25. It passes through the filter cylinder 25 radially from the inside to the outside to complete precision filtration. The clean medium flows through the outlet pipe 23 and the left two-way valve 34 into the T-shaped outlet pipe 32. After being adjusted by the control component, it is output stably. During operation, the differential pressure acquisition module is continuously used to monitor the pressure difference between the inlet and outlet in real time. At the same time, the control component is used to dynamically adjust the flow area of ​​the orifice plate 36 according to the degree of blockage of the filter cylinder 25 to offset the change in flow resistance and continuously and stably output the high-velocity, low-flow-rate medium. When the left filter cartridge 25 becomes clogged to a certain extent (i.e., the pressure difference between the inlet and outlet reaches a preset value), the T-shaped column rod 43 is lifted upwards to unlock, and the connecting bracket 42 is pushed horizontally to switch the valve position, closing the left filter channel and opening the right filter channel. The medium is then switched to the right filter channel for continuous delivery without stopping the machine. Furthermore, during the continuous delivery of the medium to the right filter channel, the self-cleaning program on the left side is activated. This is achieved by controlling the electric push rod 212 to rotate and raise the lifting column 29 to scrape off the filter cake from the inner wall of the filter cartridge 25. Simultaneously, the air bladder 219... The filter cartridge is compressed under the support of the cross plate 211, which rises synchronously with the lifting column 29, generating a reverse airflow that backflows against the outer wall of the filter cartridge. In the latter half of the continuous compression, the airbag 219 will force the liquid inside the outer cavity of the filter into the sleeve 261. As the liquid inside the sleeve 261 continues to increase, it will overcome the tension of the spring 266 to push the push column 262 out of the sleeve, assisting in the rapid discharge of the impurity-containing liquid inside the filter cartridge 25 located at the upper end of the lifting column 29, so as to minimize the amount of impurity-containing liquid remaining at the upper end of the filter cartridge 25 and achieve the purpose of reducing the cleaning frequency.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A high-flow-rate, low-volume filter valve, characterized in that, Includes a base (1), two filter sections (2) fixedly installed on the top of the base (1), and a valve (3) installed between the two filter sections (2); The valve (3) consists of a T-shaped inlet pipe (31), a T-shaped outlet pipe (32), a three-way valve (33) installed at the two outlet ends of the T-shaped inlet pipe (31), and a two-way valve (34) installed at the two inlet ends of the T-shaped outlet pipe (32). The two three-way valves (33) and the two two-way valves (34) are respectively connected to the filter section (2). The filter section (2) includes a cover (21), two isolation rings (24) are fixedly provided inside the cover (21), and an inlet pipe (22) and an outlet pipe (23) are connected to the outside of the cover (21) respectively connected to the corresponding three-way valve (33) and two-way valve (34). A filter cylinder (25) is fixedly provided inside the cover (21) at the position corresponding to the central through hole of the isolation ring (24). The filter section (2) further includes a cleaning section for cleaning the impurities trapped in the filter cylinder (25) and a pusher component (26) for assisting in discharging the liquid containing impurities from the upper end of the filter cylinder (25). The pusher component (26) and the cleaning section are linked.

2. The high-flow-rate, low-flow-rate filter valve according to claim 1, characterized in that, The cleaning unit includes an outer ring plate (27) and an inner ring plate (28) fixed at the bottom of the cover (21) in a concentric arrangement. The inner ring plate (28) has four evenly distributed slots on its circumferential side. A cross support plate (211) is movably inserted between the four slots. An airbag (219) is fixedly connected between the inner ring plate (28) and the outer ring plate (27). The two ends of the airbag (219) are fixedly connected to the isolation ring (24) located at the lower end and the end of the cross support plate (211) that passes through the slot.

3. A high-flow-rate, low-flow-rate filter valve according to claim 2, characterized in that, A plurality of U-shaped tubes (220) connecting the cover (21) and the outer ring plate (27) are fixedly provided. An air inlet pipe (223) connecting the air bag (219) is also fixedly provided on the outer side of the outer ring plate (27). An arc cover (221) facing each U-shaped tube (220) is fixedly provided inside the cover (21) between the two isolation rings (24). A plurality of exhaust pipes (222) are connected to the outer side of the arc cover (221). A one-way valve is installed on the air inlet pipe (223) and each exhaust pipe (222).

4. A high-flow-rate, low-flow-rate filter valve according to claim 2, characterized in that, The inner ring plate (28) is provided with a lifting column (29) arranged concentrically with the filter cylinder (25). The top of the lifting column (29) is movably inserted into the filter cylinder (25). Two limiting rings (210) are fixedly sleeved on the outer side of the bottom end of the lifting column (29). The cross support plate (211) is movably sleeved on the outside of the lifting column (29) at the position between the two limiting rings (210). A cylindrical groove is also opened at the bottom end of the lifting column (29). A spiral guide groove (216) is opened on the inner side of the cylindrical groove.

5. A high-flow-rate, low-flow-rate filter valve according to claim 4, characterized in that, The cleaning unit also includes an electric push rod (212) and an L-shaped rod (217) fixed on the top of the base (1). The electric push rod (212) and the L-shaped rod (217) are both located inside the cylindrical groove. A ring block (218) with the same inner diameter as the cylindrical groove is fixedly sleeved on the outside of the L-shaped rod (217). A vertical rod (213) is fixedly installed on the top of the inner cavity of the cylindrical groove. A ring strip (214) is fixedly sleeved on the outside of the telescopic end of the vertical rod (213) and the electric push rod (212). The vertical rod (213) and the telescopic end of the electric push rod (212) are rotatably connected by a bearing. A limiting cover frame (215) is sleeved on the outside of the two ring strips (214).

6. A high-flow-rate, low-flow-rate filter valve according to claim 1, characterized in that, The push assembly (26) includes a sleeve (261) fixedly installed on the upper end of the cover (21). One end of the sleeve (261) extending into the inside of the cover (21) is connected to the inside of the filter cylinder (25). A push post (262) is movably inserted into the end of the sleeve (261) connected to the inside of the filter cylinder (25). An overflow pipe (263) is connected to the other end of the sleeve (261) in the area between the two isolation rings (24) inside the cover (21). A ring sleeve (264) is fixedly provided inside the sleeve (261). A cylinder (265) with one end fixedly connected to the push post (262) is movably inserted into the ring sleeve (264). A spring (266) is fixedly connected between the end of the cylinder (265) away from the push post (262) and the end face of the inner cavity of the sleeve (261).

7. A high-flow-rate, low-flow-rate filter valve according to claim 1, characterized in that, The three-way valve (33) and the two-way valve (34) located on the same side, together with the filter section (2) on the corresponding side, form a conveying channel with a filtering function. The two conveying channels share a water inlet and a water outlet. The ball valve cores of the three-way valve (33) and the two-way valve (34) located on the same side share a valve stem. The on / off states of the two conveying channels are alternately set to open and close.

8. A high-flow-rate, low-flow-rate filter valve according to claim 7, characterized in that, The valve (3) and the base (1) are provided with a linkage adjustment assembly (4) for synchronous control of the two valve stems. The linkage adjustment assembly (4) includes a swing arm (41) fixedly sleeved in the middle of the two valve stems. A connecting frame (42) is provided between the two swing arms (41). The connecting frame (42) consists of a horizontal plate and round rods fixed at the bottom of both ends of the horizontal plate. The two round rods are rotatably connected to the corresponding swing arms (41) through bearings.

9. A high-flow-rate, low-flow-rate filter valve according to claim 8, characterized in that, The linkage adjustment component (4) also includes a locking component for limiting the state of the valve stem. The locking component includes a base (45) fixed on the top of the base (1) and a T-shaped column (43) that is movably inserted through the middle of the horizontal plate. A spring (44) is fitted on the outer side of the upper end of the T-shaped column (43) and fixedly connected to the upper side of the horizontal plate and the upper step surface of the T-shaped column (43). An arc groove (46) is opened on the top of the base (45). A locking hole (47) is opened at both ends of the arc groove (46). The lower end of the T-shaped column (43) is slidably connected to the inside of the arc groove (46).

10. A flow control device for a high-velocity, low-flow-rate filter valve as described in any one of claims 1-9, characterized in that, It includes a differential pressure acquisition module and a control component for adjusting the water flow rate of the T-shaped outlet pipe (32). The differential pressure acquisition module includes pressure taps (35) respectively located on the T-shaped inlet pipe (31) and the T-shaped outlet pipe (32). Differential pressure sensors are connected to the two pressure taps (35) through pressure taps. The control component includes a mounting frame, a worm gear disk (37), and an orifice plate (36) installed on the water outlet section of the T-shaped outlet pipe (32). The mounting frame is equipped with a worm (38) for driving the worm gear disk (37) to rotate. A water passage hole is also opened on the worm gear disk (37) at the position corresponding to the perforation on the orifice plate (36). The water outlet rate is adjusted by utilizing the misalignment between the water passage hole and the perforation on the orifice plate (36).

Images