Automatic cleaning device for ultrafiltration membrane

Abstract

The application relates to the technical field of ultrafiltration membrane cleaning, in particular to an automatic cleaning device for an ultrafiltration membrane, which comprises an ultrafiltration mechanism, a moving mechanism and a cleaning mechanism; the ultrafiltration mechanism comprises a cylinder, a transfusion pipe and an ultrafiltration pipe; the moving mechanism comprises a cleaning pipe and a roller; the cleaning mechanism comprises a drill bit and a water spraying port; the water spraying port is opened or closed according to the flow direction of the cleaning liquid; the flow direction of the cleaning liquid is controlled to realize positive flushing and back flushing; meanwhile, the deflection angle of the rolling wheel is controlled; the cleaning pipe rotates and gradually steps or retracts at the same time; the cleaning pipe rotates and can also scrape through the drill bit at the same time, so that the cleaning effect is improved; the window and the partition plate are adjusted to be opened or closed according to the direction of the cleaning liquid, the position of the flushing of the inner wall of the ultrafiltration pipe is changed, the dead angle dirt is conveniently removed, the opening and closing of the fan blade are automatically adjusted according to the direction of the cleaning liquid, so that the impurities in the inner wall of the ultrafiltration pipe are drilled and scraped, and the impurities are sucked through the window, the channel is prevented from being blocked by the impurities during the cleaning process, the situation that the cleaning liquid cannot flow is avoided, and the cleaning effect is improved.

Description

Technical Field

[0001] This invention relates to the field of ultrafiltration membrane cleaning technology, and in particular to an automatic cleaning device for ultrafiltration membranes. Background Technology

[0002] Produced water from gas fields contains a variety of substances, such as salts and minerals, organic matter, suspended solids including silt, rust, humic substances and other solid particles, chemical additives, and dissolved gases such as methane, carbon dioxide, and hydrogen sulfide. Due to the complex composition and certain pollutants of produced water from gas fields, it is necessary to treat it to render it harmless. Ultrafiltration membrane filtration technology is a membrane separation technology that uses a semi-permeable membrane with a microporous structure to filter liquids, thereby removing particulate matter, colloidal substances, bacteria, viruses and other macromolecular pollutants from the water.

[0003] During use, the pores of ultrafiltration membranes can become clogged by particulate matter, colloids, organic matter, or microorganisms, leading to a decrease in membrane flux and reduced operating efficiency. Some chemical substances can react with the membrane material, causing a decline in membrane performance or damage. Solid particles may cause mechanical wear on the membrane, shortening its service life. Therefore, it is necessary to clean the ultrafiltration membrane in a timely manner during use to prevent filtration efficiency reduction caused by ultrafiltration membrane clogging.

[0004] A Chinese patent application with publication number CN110559864A discloses a self-cleaning device for ultrafiltration membranes, which includes an inlet system, an ultrafiltration membrane system, a backwashing system, and a hydraulic automatic control system. The ultrafiltration membrane system includes an ultrafiltration membrane module, a product water pipe, and a backwash drain pipe. The inlet of the ultrafiltration membrane module is connected to the inlet system. The backwashing system includes a backwash water tank and a siphon breaking bucket installed inside the backwash water tank. An overflow port is provided at the top of the backwash water tank. A siphon pipe is provided between the siphon breaking bucket and the backwash water tank. The other end of the product water pipe is connected to the backwash water tank. The hydraulic automatic control system includes an outer siphon sleeve, an inner siphon sleeve, a siphon auxiliary pipe, and a siphon breaking pipe. It can effectively clean the membrane fibers, reduce the use of valves and pumps, reduce energy consumption, and reduce operating costs.

[0005] However, since the above-mentioned technical solutions only clean the ultrafiltration membrane macroscopically and cannot clean a specific ultrafiltration membrane filament individually, the cleaning effect is limited. At the same time, because the space inside the ultrafiltration membrane filament is small, only 0.9-2mm in diameter, impurities and dirt may clog it during forward and reverse rinsing and cannot be discharged in time, resulting in low cleaning efficiency of the ultrafiltration tube filament. In addition, conventional methods cannot control the cleaning efficiency of the ultrafiltration tube. Therefore, a device specifically designed to clean the filament of ultrafiltration membrane filament is needed. Summary of the Invention

[0006] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0007] In view of the problems existing in the prior art, the present invention is proposed.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automatic cleaning device for ultrafiltration membranes, comprising an ultrafiltration mechanism, including a cylinder, a liquid delivery pipe connected to the upper and lower ends of the cylinder, and an array of ultrafiltration tubes arranged inside the cylinder, wherein the ultrafiltration tubes are made of ultrafiltration membranes, and gas field water enters the cylinder through the liquid delivery pipes and is filtered through the ultrafiltration tubes;

[0009] The moving mechanism includes a cleaning tube slidably disposed inside the ultrafiltration tube and a roller movably disposed on the outer wall of the cleaning tube. The inner wall of the cleaning tube is filled with cleaning fluid. As the cleaning fluid enters the cleaning tube, the cleaning tube rotates around its axis. The rotation angle of the roller is controlled by the direction of the cleaning fluid flow. The roller is driven to rotate by a miniature waterproof motor.

[0010] The cleaning mechanism includes a drill bit and a water nozzle located at one end of the cleaning tube. The water nozzle is opened or closed according to the flow direction of the cleaning fluid.

[0011] As a preferred embodiment of the automatic cleaning device for ultrafiltration membranes described in this invention, a limiting sleeve is provided on the outer wall of the cleaning tube, one end of the limiting sleeve is movably fitted into the inner wall of the ultrafiltration tube, and a backflushing port is opened at the end of the limiting sleeve located inside the cleaning tube.

[0012] As a preferred embodiment of the automatic cleaning device for ultrafiltration membranes described in this invention, the outer wall of the cleaning tube is fitted with a housing, the outer wall of the cleaning tube is slidably fitted with a reciprocating sleeve, the reciprocating sleeve is coaxially disposed within the housing, and the outer wall of the reciprocating sleeve is provided with a control ring.

[0013] In a preferred embodiment of the automatic cleaning device for ultrafiltration membranes described in this invention, a sliding cylinder is vertically provided on the outer wall of the housing, and a sliding column is slidably provided inside the sliding cylinder. One end of the sliding column extends through the outer wall of the sliding cylinder and is connected to the roller.

[0014] As a preferred embodiment of the automatic cleaning device for ultrafiltration membranes of the present invention, wherein: the other end of the sliding column is provided with an oblique angle, the end of the control ring away from the drill bit is provided with a reversing step, and the oblique angle is slidably attached to the outer wall of the reversing step;

[0015] A sensing disc is fixedly provided on the inner wall of the cleaning pipe. A frustum groove is opened at one end of the sensing disc near the drill bit. A telescopic rod is slidably provided on the axis of the sensing disc. A frustum is provided at one end of the telescopic rod near the frustum groove. The frustum is movably fitted into the frustum groove.

[0016] As a preferred embodiment of the automatic cleaning device for ultrafiltration membranes described in this invention, the induction disk end face is provided with a circumferential array of counterflow holes, a one-way valve is provided in the counterflow holes, and a bracket is slidably sleeved on one end of the telescopic rod.

[0017] The inner wall of the cleaning tube has a through groove, and a connecting rod is vertically provided on the telescopic rod. The connecting rod slides through the groove and is fixedly connected to the control ring.

[0018] As a preferred embodiment of the automatic cleaning device for ultrafiltration membranes of the present invention, the outer wall of the reciprocating sleeve is provided with a first spiral groove, and the inner wall of the control ring is fixedly provided with a first slider, which slides freely along the inner wall of the first spiral groove.

[0019] The inner wall of the housing has a first ring and a second ring, the first ring and the second ring are coaxial and parallel, and a transverse groove is perpendicularly formed between the first ring and the second ring.

[0020] As a preferred embodiment of the automatic cleaning device for ultrafiltration membranes according to the present invention, the outer wall of the reciprocating sleeve is also symmetrically provided with limiting blocks, the limiting blocks slide in the transverse groove along the axial direction of the shell, and the limiting blocks rotate in the first ring and the second ring;

[0021] The reciprocating sleeve has a long rod slidingly attached to its inner wall. The long rod slides through the axis of the cleaning tube and a rotating shaft is located at the axis of the cleaning tube. The rotating shaft slides through the long rod via a flat key.

[0022] As a preferred embodiment of the automatic cleaning device for ultrafiltration membranes according to the present invention, the housing is provided with a partition at one end near the drill bit, a diagonal plate is rotatably provided inside the partition, and the rotating shaft rotatably passes through the partition and is fixedly connected to the diagonal plate;

[0023] The outer wall of the housing has a window, and a gate is slidably installed inside the window. One end of the connecting rod slidably passes through the housing and is connected to the gate.

[0024] In a preferred embodiment of the automatic cleaning device for ultrafiltration membranes according to the present invention, a spreading ring is slidably sleeved on the outer wall of the housing, and one end of the connecting rod is slidably connected to the gate and the housing and connected to the spreading ring.

[0025] The lower end of the drill bit is provided with a hexagonal block, and a swing rod is rotatably provided on the outer wall of the hexagonal block. Six swing rods are arranged in a circumferential array, and fan blades are rotatably connected between each swing rod.

[0026] The outer wall of the swing ring is provided with a transmission rod, and the end of the transmission rod away from the swing ring is provided with a round tube, which is slidably sleeved on the outer wall of the swing rod.

[0027] The beneficial effects of this invention are as follows: By controlling the flow direction of the cleaning fluid, forward and reverse flushing are achieved. Simultaneously, the tilt angle of the rolling wheel is controlled, allowing for gradual advancement or retraction while the cleaning tube rotates. The rotating cleaning tube also enables cleaning and scraping via a drill bit, improving the cleaning effect. The window and baffle automatically adjust their opening and closing according to the direction of the cleaning fluid, thereby changing the flushing position on the inner wall of the ultrafiltration tube, facilitating the removal of dirt from hard-to-reach areas and improving the cleaning effect. The fan blades also automatically adjust their opening and closing according to the direction of the cleaning fluid, thus drilling and scraping impurities from the inner wall of the ultrafiltration tube, which are then sucked away through the window. This prevents impurities from clogging the channels during cleaning, thus improving the cleaning effect. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0029] Figure 1 This is a schematic diagram of the automatic cleaning device for ultrafiltration membranes in this invention.

[0030] Figure 2 This is a diagram showing the internal structure of the automatic cleaning device for ultrafiltration membranes in this invention.

[0031] Figure 3 This is an enlarged schematic diagram of the fan blade region structure in this invention.

[0032] Figure 4 This is a schematic cross-sectional view of the cleaning pipe in this invention.

[0033] Figure 5 This is an enlarged view of the induction disk area in this invention.

[0034] Figure 6 This is a partially enlarged schematic diagram of the moving mechanism in this invention.

[0035] Figure 7 This is a schematic diagram of a window in this invention.

[0036] Figure 8 This is a schematic diagram of the partition and diagonal plate structure in this invention.

[0037] Figure label:

[0038] 100, cylinder; 101, infusion tubing; 102, ultrafiltration tubing;

[0039] 200, Cleaning brush pipe; 2001, Limiting sleeve; 2002, Backflush port; 2003, Housing; 2004, Reciprocating sleeve; 2005, Control ring; 2006, Slide cylinder; 2007, Slide column; 2008, Angled angle; 2009, Directional step; 201, Roller; 2011, Induction plate; 2012, Frustum groove; 2013, Telescopic rod; 2014, Frustum; 2015, Counterflow hole; 2016, Support; 2017, Slide groove; 2018, Connecting rod; 2026, First spiral groove; 2027, First slider; 2028, First ring; 2029, Second ring; 2031, Horizontal groove; 2032, Limiting block; 2033, Long rod; 2034, Rotating shaft; 2035, Partition plate; 2036, Diagonal plate;

[0040] 300, drill bit; 301, water nozzle; 3011, window; 3012, gate; 3021, expansion ring; 3022, hexagonal block; 3023, swing arm; 3024, fan blade; 3025, transmission rod; 3026, round pipe. Detailed Implementation

[0041] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0043] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0044] Example 1

[0045] Reference Figures 1-8This is the first embodiment of the present invention. This embodiment provides an automatic cleaning device for ultrafiltration membranes, including an ultrafiltration mechanism, a moving mechanism and a cleaning mechanism. The device controls the flow direction of the cleaning liquid to achieve forward flushing and back flushing, and controls the tilt angle of the roller 201. While the cleaning tube 200 rotates, the device gradually advances or retracts. While the cleaning tube 200 rotates, it can also perform cleaning and scraping through the drill bit 300 to improve the cleaning effect.

[0046] Specifically, it includes: an ultrafiltration mechanism, including a cylinder 100, a liquid delivery pipe 101 connected to the upper and lower ends of the cylinder 100, and an ultrafiltration tube 102 arrayed inside the cylinder 100. The ultrafiltration tube 102 is made of an ultrafiltration membrane. Gas field water enters the cylinder 100 through the liquid delivery pipe 101 and is filtered through the ultrafiltration tube 102.

[0047] The moving mechanism includes a cleaning tube 200 slidably disposed within the ultrafiltration tube 102 and a roller 201 movably disposed on the outer wall of the cleaning tube 200. The inner wall of the cleaning tube 200 is filled with cleaning fluid. As the cleaning fluid enters the cleaning tube 200, the cleaning tube 200 rotates around its axis. The turning angle of the roller 201 is controlled by the direction of the cleaning fluid flow. The roller 201 is driven to rotate by a miniature waterproof motor.

[0048] The cleaning mechanism includes a drill bit 300 and a water nozzle 301 located at one end of the cleaning tube 200. The water nozzle 301 is opened or closed according to the direction of the cleaning fluid flow.

[0049] Furthermore, a limiting sleeve 2001 is provided on the outer wall of the cleaning tube 200. One end of the limiting sleeve 2001 is movably fitted into the inner wall of the ultrafiltration tube 102, and the end of the limiting sleeve 2001 located inside the cleaning tube 200 has a backflush port 2002.

[0050] The limiting sleeve 2001 is in the shape of a frustum, and the smaller diameter end is fitted into the inner wall of the ultrafiltration tube 102. The cleaning tube 200 rotates through the limiting sleeve 2001. There is a gap between the cleaning tube 200 and the inner wall of the limiting sleeve 2001 to facilitate the cleaning fluid to flow out during forward flushing and flow in during back flushing.

[0051] Preferably, the outer wall of the cleaning tube 200 is fitted with a housing 2003, and the outer wall of the cleaning tube 200 is slidably fitted with a reciprocating sleeve 2004, which is coaxially disposed inside the housing 2003. The outer wall of the reciprocating sleeve 2004 is provided with a control ring 2005.

[0052] When the roller 201 rotates after being tilted at an angle, it will drive the cleaning tube 200 to rotate as a whole and move forward or backward. The rotation speed of the roller 201 changes synchronously with the flow rate of the cleaning fluid.

[0053] In this embodiment, the housing 2003 is fixedly fitted onto the outer wall of the cleaning pipe 200, and the housing 2003 is hollow inside. The drill bit 300 is a conical rough rubber block with scraping grooves on its surface and water spray nozzles 301 arranged in a circumferential array on its surface.

[0054] While the cleaning tube 200 rotates, the drill bit 300 rotates and scrapes the impurities in the ultrafiltration tube 102, and sprays cleaning fluid through the water nozzle 301. The cleaned mixture and impurities flow out from the limiting sleeve 2001 through the gap between the cleaning tube 200 and the ultrafiltration tube 102, forming a positive flush.

[0055] More preferably, a sliding cylinder 2006 is vertically provided on the outer wall of the housing 2003, and a sliding column 2007 is slidably provided inside the sliding cylinder 2006. The sliding column 2007 passes through to one end of the outer wall of the sliding cylinder 2006 and is connected to the roller 201.

[0056] Furthermore, the other end of the sliding column 2007 is provided with an angle 2008, and the end of the control ring 2005 away from the drill bit 300 is provided with a deflection step 2009, and the angle 2008 is slidably attached to the outer wall of the deflection step 2009.

[0057] In this embodiment, the outer wall of the sliding column 2007 is provided with a slider, and the inner wall of the sliding cylinder 2006 is provided with a spiral groove. The slider slides on the inner wall of the sliding cylinder 2006, so that the roller 201 rotates while the sliding column 2007 rises and falls.

[0058] The deflection step 2009 is fixedly connected to the control ring 2005. The inclination angles of the deflection step 2009 and the inclined angle 2008 are both 45°. Thus, while the deflection step 2009 slides up and down along the reciprocating sleeve 2004, it pushes the inclined angle 2008 to move up and down along the slide cylinder 2006.

[0059] Preferably, an induction plate 2011 is fixedly provided on the inner wall of the cleaning tube 200. A frustum groove 2012 is opened at one end of the induction plate 2011 near the drill bit 300. A telescopic rod 2013 is slidably provided on the axis of the induction plate 2011. A frustum 2014 is provided at one end of the telescopic rod 2013 near the frustum groove 2012. The frustum 2014 is movably fitted into the frustum groove 2012.

[0060] More preferably, the end face of the induction disk 2011 has a circumferential array of backflow holes 2015, and a one-way valve is provided inside the backflow holes 2015. One end of the telescopic rod 2013 is slidably fitted with a bracket 2016.

[0061] The induction plate 2011 is cylindrical and is sealed inside the cleaning tube 200, so that cleaning must pass through the induction plate 2011. There is a gap between the telescopic rod 2013 and the induction plate 2011. The telescopic rod 2013 slides along the axis of the induction plate 2011 through the bracket 2016.

[0062] When the cleaning fluid flows from the drill bit 300 along the cleaning pipe 200 towards the support 2016, it pushes the bottom surface of the frustum 2014 to move and fit into the frustum groove 2012, thereby blocking the water flow. The cleaning fluid can only flow out through the counterflow hole 2015 via the one-way valve. Similarly, when the cleaning fluid flows in the opposite direction, the frustum 2014 and the telescopic rod 2013 move outward, and the water flows out from the frustum groove 2012.

[0063] Preferably, a groove 2017 is provided through the inner wall of the cleaning tube 200, and a connecting rod 2018 is vertically provided on the telescopic rod 2013. The connecting rod 2018 slides through the groove 2017 and is fixedly connected to the control ring 2005.

[0064] In this embodiment, the connecting rod 2018 is made of a flexible material and has elasticity, so that it can drive the control ring 2005 to move synchronously when the telescopic rod 2013 moves. The roller 201 is driven by a miniature waterproof motor to rotate.

[0065] In summary, during use, the motor is started to drive the water pump to rotate, thereby pumping the cleaning fluid into the cleaning tube 200. At the same time, the motor drives the cleaning tube 200 and the drill bit 300 to rotate, scraping away impurities in the ultrafiltration tube 102. Simultaneously, the cleaning fluid is sprayed through the spray nozzle 301. The cleaning fluid is sprayed out of the ultrafiltration tube 102 from the spray nozzle at the front end of the drill bit 300 for cleaning. The mixture and impurities are discharged from the gap between the inner wall of the ultrafiltration tube 102 and the cleaning tube 200. Then, the water flow direction is controlled to inject the cleaning fluid between the inner wall of the limiting sleeve 2001 and the cleaning tube 200 for backflushing, improving the cleaning quality and better removing stubborn impurities.

[0066] Meanwhile, in the forward flushing state, the roller 201 rotates 45° counterclockwise from the axis of the vertical cleaning pipe 200, thereby driving the cleaning pipe 200 to rotate and move forward under the drive of the micro waterproof motor, realizing the rotation of the drill bit 300 to remove impurities. While removing impurities, the cleaning pipe 200 gradually advances. When backflushing occurs, the direction of the cleaning fluid changes. As the cleaning fluid flows from the drill bit 300 direction along the cleaning pipe 200 towards the support 2016, it pushes the bottom surface of the frustum 2014 to move and engage with the frustum groove 2012. When the water flow is blocked, the cleaning fluid can only flow out through the one-way valve from the counterflow hole 2015. At this time, the direction of the cleaning fluid flow changes, causing the truncated cone 2014, the telescopic rod 2013, and the connecting rod 2018 to move in the opposite direction, thereby causing the control ring 2005 to move. At the same time, the deflection step 2009 moves, causing the inclined angle 2008 to descend. As the sliding column 2007 rises and falls, it rotates 90° clockwise, thereby changing the angle of the roller 201 and changing the direction of movement, realizing the automatic retraction and withdrawal of the cleaning tube 200.

[0067] Example 2

[0068] Reference Figures 1-8 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but the difference is that the window 3011 and the partition 2035 can automatically adjust their opening and closing according to the direction of the cleaning fluid, thereby changing the flushing position of the inner wall of the ultrafiltration tube 102, making it easier to remove dirt from dead corners and improving the cleaning effect.

[0069] Specifically, the reciprocating sleeve 2004 has a first spiral groove 2026 on its outer wall, and the control ring 2005 has a first slider 2027 fixedly installed on its inner wall. The first slider 2027 slides freely along the inner wall of the first spiral groove 2026.

[0070] Preferably, the inner wall of the housing 2003 has a first ring 2028 and a second ring 2029, the first ring 2028 and the second ring 2029 are coaxial and parallel, and a transverse groove 2031 is perpendicularly formed between the first ring 2028 and the second ring 2029.

[0071] Furthermore, the outer wall of the reciprocating sleeve 2004 is also symmetrically provided with limiting blocks 2032. The limiting blocks 2032 slide in the transverse groove 2031 along the axial direction of the shell 2003, and the limiting blocks 2032 rotate in the first ring 2028 and the second ring 2029.

[0072] When the control ring 2005 slides along the outer wall of the reciprocating sleeve 2004, the first slider 2027 slides in the first spiral groove 2026 and drives the reciprocating sleeve 2004 to move or rotate. When the limiting block 2032 slides in the transverse groove 2031, the reciprocating sleeve 2004 slides with the first slider 2027. When the limiting block 2032 rotates in the first ring 2028 and the second ring 2029, the reciprocating sleeve 2004 and the first slider 2027 rotate relative to each other, thereby causing the reciprocating sleeve 2004 to rotate.

[0073] Among them, there are two limiting blocks 2032 symmetrically arranged on both sides of the outer wall of the reciprocating sleeve 2004, and the limiting blocks 2032 are slidably arranged in the transverse groove 2031.

[0074] Preferably, a long rod 2033 is slidably provided on the inner wall of the reciprocating sleeve 2004. The long rod 2033 slides through to the axis of the cleaning tube 200, and a rotating shaft 2034 is provided at the axis of the cleaning tube 200. The rotating shaft 2034 slides through the long rod 2033 via a flat key.

[0075] Furthermore, a partition 2035 is provided at one end of the housing 2003 near the drill bit 300, and a diagonal plate 2036 is rotatably provided inside the partition 2035. The rotating shaft 2034 rotatably passes through the partition 2035 and is fixedly connected to the diagonal plate 2036.

[0076] The long rod 2033 and the reciprocating sleeve 2004 are slidably connected by a flat key, so that the two can rotate synchronously but the long rod 2033 will not slide with the reciprocating sleeve 2004. At the same time, the rotating shaft 2034 only rotates with the long rod 2033 and does not move with it. The partition 2035 is two centrally symmetrical sectors. The partition 2035 is hollow inside. The diagonal plate 2036 is driven to rotate by the rotating shaft 2034 and is located on the inner wall of the partition 2035. The diagonal plate 2036 is also two centrally symmetrical sectors. The diagonal plate 2036 and the partition 2035 fit together to form a complete circle and close the shell 2003.

[0077] More preferably, the outer wall of the housing 2003 has a window 3011, and a gate 3012 is slidably provided in the window 3011. One end of the connecting rod 2018 slidably passes through the housing 2003 and is connected to the gate 3012.

[0078] Furthermore, window 3011 is an arc-shaped area that runs through the outer wall of housing 2003 with an arc angle of 60°. Two windows 3011 are symmetrically arranged to improve the adsorption efficiency of the mixed liquid. During backflushing, housing 2003 rotates and simultaneously flushes all parts of the outer wall of ultrafiltration tube 102, cleaning the dead corner area of ​​the forward flushing and improving the cleaning effect.

[0079] The inner wall of window 3011 has a storage groove, and the connecting rod 2018 in this embodiment plays a connecting role, so that the gate 3012 and the control ring 2005 move synchronously, and the gate 3012 slides in the storage groove under the drive of the connecting rod 2018.

[0080] Even better, when the gate 3012 is fully slid out of the receiving groove, it can be fitted and spliced ​​with the window 3011 to seal this section of the housing 2003. The opening and closing states of the window 3011 and the partition 2035 are opposite, thereby realizing the adjustment of the outlet position.

[0081] In summary, during forward flushing, the cleaning fluid flows from the cleaning pipe 200 to the drill bit 300 and is cleaned through the spray nozzle 301. At this time, driven by the cleaning fluid, the control ring 2005 slides towards the drill bit 300 and slides through the first slider 2027 in the first spiral groove 2026, causing the reciprocating sleeve 2004 to first slide along the transverse groove 2031 axially, and then rotate when it moves to the second ring 2029. Similarly, during backflushing, the direction of the cleaning fluid and the direction of movement of the control ring 2005 change. The reciprocating sleeve 2004 first slides along the transverse groove 2031 axially, and then rotates when it moves to the first ring 2028.

[0082] Meanwhile, when the control ring 2005 drives the reciprocating sleeve 2004 to move towards the drill bit 300, the connecting rod 2018 drives the gate 3012 to slide out of the receiving groove and fit into the window 3011 for sealing. At the same time, when the reciprocating sleeve 2004 rotates in the second ring 2029, the long rod 2033 drives the rotating shaft 2034 to rotate. The rotating shaft 2034 drives the diagonal plate 2036 to rotate into the interior of the partition 2035, so that the cleaning fluid can flow to the drill bit 300 through the partition 2035. During backflushing, the window 3011 opens and the partition 2035 closes, changing the flushing direction, removing dirt from dead corners, and improving the cleaning effect.

[0083] Example 3

[0084] Reference Figures 1-8 This is the third embodiment of the present invention. This embodiment is based on the previous embodiment, but the difference is that the opening and closing of the fan blade 3024 will also be automatically adjusted according to the direction of the cleaning fluid, so as to drill holes and scrape off the impurities on the inner wall of the ultrafiltration tube 102, and suck them away through the window 3011, preventing impurities from clogging the channel during the cleaning process and causing the cleaning fluid to be unable to flow, thereby improving the cleaning effect.

[0085] Specifically, a slidable extension ring 3021 is provided on the outer wall of the housing 2003, and one end of the connecting rod 2018 is slidably connected to the gate 3012 and the housing 2003 and connected to the extension ring 3021.

[0086] Among them, the expansion ring 3021 is a circular sleeve, and the connecting rod 2018 is fixedly connected to the expansion ring 3021. When the control ring 2005 moves, it drives the connecting rod 2018 and the expansion ring 3021 to move synchronously.

[0087] Furthermore, the lower end of the drill bit 300 is provided with a hexagonal block 3022, and the outer wall of the hexagonal block 3022 is provided with a rocker arm 3023. There are six rocker arms 3023 arranged in a circumferential array, and each rocker arm 3023 is rotatably connected to a fan blade 3024.

[0088] Among them, there are also six fan blades 3024. The outer wall of the fan blades 3024 is provided with rubber bristles. When the six fan blades 3024 are fully extended, they are assembled into a complete circle and attached to the inner wall of the ultrafiltration tube 102 to scrape off impurities on the inner wall.

[0089] Preferably, a transmission rod 3025 is rotatably provided on the outer wall of the expansion ring 3021, and a round tube 3026 is provided at the end of the transmission rod 3025 away from the expansion ring 3021. The round tube 3026 is slidably sleeved on the outer wall of the swing rod 3023.

[0090] There are three transmission rods 3025 and round tubes 3026, which are slidably connected to the spaced-apart swing rods 3023. When the expansion ring 3021 moves up and down, the transmission rods 3025 and round tubes 3026 drive the swing rods 3023 to swing up and down, thereby realizing the expansion and retraction of the fan blades 3024.

[0091] When retracted, the fan blade 3024 is conical, which facilitates the rotation of the cleaning tube 200 to drill holes, thereby reducing forward resistance and improving cleaning efficiency. When unfolded, the fan blade 3024 fits against the inner wall of the ultrafiltration tube 102. During the retraction of the fan blade 3024, it scrapes away stubborn residues and dead corners on the inner wall again and sucks them away through the window 3011, preventing impurities from clogging the channel during the cleaning process and causing water flow to be blocked.

[0092] In summary, during forward flushing, the fan blade 3024 retracts, and the drill bit 300 drives the fan blade 3024 to rotate and move forward, drilling holes in and breaking up the solid filter screen, which is then flushed out by the cleaning fluid. During backflushing, the fan blade 3024 unfolds, and the drill bit 300 and the fan blade 3024 retract. The fan blade 3024 scrapes against the inner wall of the ultrafiltration tube 102 to remove stubborn residues and dead corners, and the mixed liquid is sucked away through the window 3011 to prevent impurities from clogging the channel during the cleaning process and causing the water flow to stop.

[0093] Meanwhile, when encountering jamming or blockage during the forward flushing process and unable to move forward, the forward and reverse flushing are repeatedly switched. The impurities in the area are pulverized and removed by the drilling when the fan blades 3024 are retracted and the scraping when they are unfolded. The mixed liquid is also sucked away in time through the window 3011 to prevent blockage and improve cleaning efficiency.

[0094] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0095] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0096] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0097] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automatic cleaning device for ultrafiltration membranes, characterized in that, include: The ultrafiltration mechanism includes a cylinder (100), a delivery pipe (101) connected to the upper and lower ends of the cylinder (100), and an ultrafiltration tube (102) arrayed inside the cylinder (100). The ultrafiltration tube (102) is made of an ultrafiltration membrane. Gas field water enters the cylinder (100) through the delivery pipe (101) and is filtered through the ultrafiltration tube (102). The moving mechanism includes a cleaning tube (200) slidably disposed within the ultrafiltration tube (102) and a roller (201) movably disposed on the outer wall of the cleaning tube (200). The inner wall of the cleaning tube (200) is filled with cleaning fluid. As the cleaning fluid enters the cleaning tube (200), the cleaning tube (200) rotates around its axis. The turning angle of the roller (201) is controlled by the flow direction of the cleaning fluid. The roller (201) is driven to rotate by a miniature waterproof motor. The cleaning mechanism includes a drill bit (300) and a water nozzle (301) located at one end of the cleaning tube (200). The water nozzle (301) is opened or closed according to the direction of the cleaning fluid flow. The outer wall of the cleaning tube (200) is fitted with a limiting sleeve (2001), one end of which is movably fitted into the inner wall of the ultrafiltration tube (102), and the end of the limiting sleeve (2001) located inside the cleaning tube (200) has a backflush port (2002). The outer wall of the cleaning tube (200) is fitted with a housing (2003), and the outer wall of the cleaning tube (200) is slidably fitted with a reciprocating sleeve (2004). The reciprocating sleeve (2004) is coaxially disposed inside the housing (2003), and the outer wall of the reciprocating sleeve (2004) is provided with a control ring (2005). The outer wall of the housing (2003) is vertically provided with a sliding cylinder (2006), and a sliding column (2007) is slidably provided inside the sliding cylinder (2006). One end of the sliding column (2007) extends through the outer wall of the sliding cylinder (2006) and is connected to the roller (201). The other end of the sliding column (2007) is provided with an angle (2008), and the end of the control ring (2005) away from the drill bit (300) is provided with a deflection step (2009). The angle (2008) is slidably attached to the outer wall of the deflection step (2009). The inner wall of the cleaning tube (200) is fixedly provided with a sensing disk (2011). The end of the sensing disk (2011) near the drill bit (300) has a frustum groove (2012). A telescopic rod (2013) is slidably provided on the axis of the sensing disk (2011). A frustum (2014) is provided on the end of the telescopic rod (2013) near the frustum groove (2012). The frustum (2014) is movably fitted with the frustum groove (2012). The end face of the induction plate (2011) has a circumferential array of counterflow holes (2015), and a one-way valve is provided in the counterflow holes (2015). One end of the telescopic rod (2013) is slidably fitted with a bracket (2016). The inner wall of the cleaning tube (200) has a through groove (2017), and a connecting rod (2018) is vertically provided on the telescopic rod (2013). The connecting rod (2018) slides through the groove (2017) and is fixedly connected to the control ring (2005).

2. The automatic cleaning device for ultrafiltration membranes as described in claim 1, characterized in that: The reciprocating sleeve (2004) has a first spiral groove (2026) on its outer wall, and the control ring (2005) has a first slider (2027) fixedly provided on its inner wall. The first slider (2027) slides freely along the inner wall of the first spiral groove (2026). The inner wall of the housing (2003) has a first ring (2028) and a second ring (2029). The first ring (2028) and the second ring (2029) are coaxial and parallel. A transverse groove (2031) is perpendicularly opened between the first ring (2028) and the second ring (2029).

3. The automatic cleaning device for ultrafiltration membranes as described in claim 2, characterized in that: The outer wall of the reciprocating sleeve (2004) is also symmetrically provided with limiting blocks (2032). The limiting blocks (2032) slide in the transverse groove (2031) along the axial direction of the housing (2003). The limiting blocks (2032) rotate within the first ring (2028) and the second ring (2029). The reciprocating sleeve (2004) has a long rod (2033) slidingly mounted on its inner wall. The long rod (2033) slides through the axis of the cleaning tube (200), and a rotating shaft (2034) is provided at the axis of the cleaning tube (200). The rotating shaft (2034) slides through the long rod (2033) via a flat key.

4. The automatic cleaning device for ultrafiltration membranes as described in claim 3, characterized in that: The housing (2003) has a partition (2035) at one end near the drill bit (300), and a diagonal plate (2036) is rotatably provided inside the partition (2035). The rotating shaft (2034) rotatably passes through the partition (2035) and is fixedly connected to the diagonal plate (2036). The outer wall of the housing (2003) has a window (3011), and a gate (3012) is slidably provided in the window (3011). One end of the connecting rod (2018) slides through the housing (2003) and is connected to the gate (3012).

5. The automatic cleaning device for ultrafiltration membranes as described in claim 4, characterized in that: The outer wall of the housing (2003) is slidably fitted with a spreading ring (3021), and one end of the connecting rod (2018) is slidably connected to the gate (3012) and the housing (2003) and connected to the spreading ring (3021); The drill bit (300) has a hexagonal block (3022) at its lower end. The outer wall of the hexagonal block (3022) is rotatably provided with a rocker arm (3023). There are six rocker arms (3023) arranged in a circumferential array. Each rocker arm (3023) is rotatably connected with a fan blade (3024). The outer wall of the swing ring (3021) is provided with a transmission rod (3025) for rotation. The end of the transmission rod (3025) away from the swing ring (3021) is provided with a round tube (3026). The round tube (3026) is slidably sleeved on the outer wall of the swing rod (3023).

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