Filter element self-cleaning type ultrafiltration machine

Abstract

The utility model relates to ultrafilter technical field discloses a filter core is from the cleaning formula ultrafilter, including ultrafiltration filter component, and the ultrafiltration filter component includes main pipeline, and the inside annular arrangement of main pipeline is provided with a plurality of hollow ultrafiltration membrane silk, and the outside of main pipeline is provided with the ultrasonic generator for the ultrasonic cleaning of a plurality of hollow ultrafiltration membrane silk at both sides, and the both ends fixed connection of main pipeline has the raw liquid injection control component and the concentrated solution discharge control component, through the raw liquid injection control component and the concentrated solution discharge control component coordination work, has guaranteed the effective transmission and control of raw liquid and concentrated solution, and the combination of displacement component and ultrasonic generator, utilize the vibration cleaning membrane silk surface of ultrasonic wave, avoid membrane silk jam and performance decline, prolong the service life of membrane, and the epoxy resin sealing disc ensures the isolation and sealing of liquid, avoids the cross -contamination of raw liquid and permeate.

Description

Technical Field

[0001] This utility model relates to the field of ultrafiltration technology, specifically to a self-cleaning ultrafiltration machine. Background Technology

[0002] An ultrafiltration machine is a water treatment device that utilizes ultrafiltration membrane technology. It is widely used in water treatment, food processing, and the pharmaceutical industry. Its core principle is to use a built-in hollow ultrafiltration membrane to retain substances larger than the membrane pore size, such as suspended solids, bacteria, viruses, and colloidal substances, while allowing smaller molecules such as water molecules and dissolved salts to pass through. The pore size of ultrafiltration membranes is typically between 0.1 and 0.01 micrometers, thus effectively removing impurities from the water and achieving water purification. Because it does not rely on chemical treatment and is simple to operate, energy-saving, and environmentally friendly, ultrafiltration machines have broad application prospects in water purification, industrial circulating water treatment, and drinking water preparation.

[0003] While existing internal pressure hollow fiber ultrafiltration membranes have wide applications in water treatment, they also have certain limitations. Because the fluid inside the membrane fibers needs to be driven by a pressure difference to permeate radially outward from the hollow fiber interior to form the permeate, while the concentrate remains inside the hollow fiber and flows out, impurities and contaminants gradually accumulate on the inner wall of the membrane fibers. Due to the design principle of internal pressure membrane fibers, cleaning the internal fouling becomes relatively difficult, leading to easy clogging of the membrane fibers. In severe cases, this can affect the membrane's lifespan and filtration efficiency. Furthermore, hollow fiber membranes... The ends of the membrane fibers are sealed with epoxy resin. While this sealing design effectively prevents the raw solution from directly seeping into the permeate without filtration, the epoxy resin sealing structure may become a cleaning blind spot during membrane fiber cleaning, making it difficult to thoroughly remove accumulated contaminants. This design limitation increases the complexity of later maintenance. Especially after long-term operation, the accumulated dirt and microorganisms can easily cause irreversible damage to the membrane performance, affecting the stability and efficiency of the overall system. Therefore, those skilled in the art provide a self-cleaning ultrafiltration machine to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide a self-cleaning ultrafiltration machine that solves the problem that in the prior art, the epoxy resin end cap structure may become a cleaning blind spot when cleaning the membrane fibers, making it difficult to completely remove accumulated pollutants. This design limitation increases the complexity of later maintenance, and especially after long-term operation, the accumulated dirt and microorganisms can easily cause irreversible damage to the membrane performance, affecting the stability and efficiency of the overall system.

[0005] This utility model provides the following technical solution: a self-cleaning ultrafiltration machine, including an ultrafiltration filtration assembly, the ultrafiltration filtration assembly including a main pipe, a plurality of hollow ultrafiltration membrane fibers arranged in a ring inside the main pipe, ultrasonic generators for ultrasonically cleaning the plurality of hollow ultrafiltration membrane fibers are provided on both sides of the outside of the main pipe, a raw liquid injection control assembly and a concentrate discharge control assembly are fixedly connected to both ends of the main pipe, and a displacement assembly for driving the two ultrasonic generators to reciprocate along the outer surface of the main pipe is provided at the lower end of the main pipe.

[0006] As a preferred embodiment of the above technical solution, the main pipeline further includes a filtrate discharge port, which is fixedly sleeved on the upper side of one side inside the main pipeline. A first flow control valve body is fixedly sleeved on the upper side of the main pipeline, and epoxy resin sealing discs are fixedly sleeved on both ends of the main pipeline.

[0007] As a preferred embodiment of the above technical solution, the epoxy resin sealing disk has multiple sleeve holes arranged in a equidistant array at its center. The outer ends of the multiple hollow ultrafiltration membrane fibers are respectively fixedly sleeved in the multiple sleeve holes on one side, and the outer ends of the multiple hollow ultrafiltration membrane fibers are respectively fixed in the multiple sleeve holes on the other side.

[0008] As a preferred embodiment of the above technical solution, the raw liquid injection control component includes a first conical docking cover. The first conical docking cover is fixedly connected to the center of the main pipeline at the edge near the outlet of the filter liquid. A raw liquid inlet is fixedly sleeved inside the first conical docking cover at the end away from the main pipeline. First lugs are fixedly connected to both sides of the first conical docking cover at the end near the main pipeline. A first docking hole is opened through the center of each of the two first lugs at the ends away from each other. A second flow control valve body is fixedly sleeved on the outside of the raw liquid inlet at the end away from the first conical docking cover.

[0009] As a preferred embodiment of the above technical solution, the concentrate discharge control assembly includes a second conical docking cover. The second conical docking cover is fixedly connected to the center of the main pipeline near the edge of the filter discharge port. The concentrate discharge port is fixedly fitted inside the second conical docking cover at the end away from the main pipeline. Second docking lugs are fixedly connected to both sides of the second conical docking cover at the end near the main pipeline. The two second docking lugs have second docking holes through their centers at the ends away from each other. A third flow control valve body is fixedly fitted outside the concentrate discharge port at the end away from the second conical docking cover.

[0010] As a preferred embodiment of the above technical solution, the displacement component includes a rack and two guide rods. The rack is fixedly connected to the center of the lower end of the main pipe. One end of each rack is fixedly fitted inside two first mating holes, and the other end of each rack is fixedly fitted inside two second mating holes. Guide grooves are provided on both sides of the rack near the upper part, and guide rails are slidably fitted inside each of the two guide grooves.

[0011] As a preferred embodiment of the above technical solution, each of the two guide rails is fixedly connected to a support plate on the side away from each other, and a bearing is fixedly sleeved on the lower part of the interior of each of the two support plates. A rotating shaft is fixedly sleeved on the inner ring of each of the two bearings, and a gear is fixedly sleeved on the outer side of the rotating shaft. The gear and the rack are meshed and driven together. A protective cover is fixedly sleeved on the lower part of the outer side of each of the two support plates.

[0012] As a preferred embodiment of the above technical solution, a stepper motor is fixedly connected to the center of one of the support plates on the side away from the gear. The rotating end of the stepper motor is fixedly connected to one end of the rotating shaft. Multiple support rods are arranged and fixedly connected to the upper part of the side of the two support plates that are far apart from each other. An arc-shaped connecting plate is fixedly connected to the upper end of the multiple support rods on one side and the multiple support rods on the other side. A sliding sleeve is fixedly connected to the center of the side of the two arc-shaped connecting plates that are far apart from each other. The two sliding sleeves are respectively slidably sleeved on the outside of the two guide rods. The two ultrasonic generating devices are respectively fixedly connected to the side of the two arc-shaped connecting plates that are close to each other.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This self-cleaning ultrafiltration system coordinates the feed solution injection control component and the concentrate discharge control component to ensure effective transmission and control of the feed solution and concentrate. The combination of the displacement component and the ultrasonic generator uses ultrasonic vibration to clean the membrane fiber surface, preventing membrane fiber clogging and performance degradation, and extending the membrane's service life. The epoxy resin sealing disc ensures liquid isolation and sealing, preventing cross-contamination between the feed solution and the permeate. The overall structural design optimizes the system's fluid management, improves the ultrafiltration machine's working efficiency, and significantly enhances membrane fiber life and filtration effect through precise flow control and ultrasonic cleaning. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a self-cleaning ultrafiltration machine; Figure 2 This is a three-dimensional structural diagram of a self-cleaning ultrafiltration machine from another perspective; Figure 3 This is a three-dimensional disassembled structural diagram of a self-cleaning ultrafiltration machine; Figure 4This is a three-dimensional disassembled structural diagram of an ultrafiltration filtration component; Figure 5 A three-dimensional structural diagram of the original solution injection control component; Figure 6 A three-dimensional disassembled structural diagram of the concentrate discharge control component; Figure 7 This is a schematic diagram of the three-dimensional disassembled structure of the displacement component.

[0015] 1. Ultrafiltration filtration assembly; 101. Main pipeline; 102. Filtrate discharge port; 103. First flow control valve body; 104. Epoxy resin sealing disc; 105. Sleeve hole; 106. Hollow fiber ultrafiltration membrane; 2. Feed solution injection control assembly; 201. First conical docking cover; 202. Feed solution inlet; 203. First lug; 204. First docking hole; 205. Second flow control valve body; 3. Concentrate discharge control assembly; 301. Second conical docking cover; 302. 1. Concentrate discharge port; 303. Second docking lug; 304. Second docking hole; 305. Third flow control valve body; 4. Displacement assembly; 401. Rack; 402. Guide rod; 403. Guide groove; 404. Guide rail; 405. Support plate; 406. Bearing; 407. Rotating shaft; 408. Gear; 409. Protective cover; 4010. Stepper motor; 4011. Support rod; 4012. Sliding sleeve; 4013. Arc-shaped connecting plate; 5. Ultrasonic generating device. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] Please see Figures 1-3 As shown, this utility model provides a technical solution: a self-cleaning ultrafiltration machine, including an ultrafiltration filtration assembly 1. The ultrafiltration filtration assembly 1 includes a main pipe 101. Multiple hollow ultrafiltration membrane fibers 106 are arranged in a ring inside the main pipe 101. Ultrasonic generating devices 5 for ultrasonic cleaning of the multiple hollow ultrafiltration membrane fibers 106 are provided on both sides of the outside of the main pipe 101. A raw liquid injection control assembly 2 and a concentrate discharge control assembly 3 are fixedly connected to both ends of the main pipe 101, respectively. A displacement assembly 4 for driving the two ultrasonic generating devices 5 to reciprocate along the outer surface of the main pipe 101 is provided at the lower end of the main pipe 101.

[0018] The overall system coordinates the operation of the feed solution injection control component 2 and the concentrate discharge control component 3 to ensure effective transmission and control of the feed solution and concentrate. The combination of the displacement component 4 and the ultrasonic generator 5 uses ultrasonic vibration to clean the membrane fiber surface, avoiding membrane fiber clogging and performance degradation, and extending the membrane's service life. The epoxy resin sealing disc 104 ensures liquid isolation and sealing, avoiding cross-contamination between the feed solution and the permeate. The overall structural design optimizes the system's fluid management, improves the working efficiency of the ultrafiltration machine, and significantly improves the service life of the membrane fibers and the membrane filtration effect through precise flow control and ultrasonic cleaning.

[0019] As one embodiment of this example, as shown in Figure 5, the main pipeline 101 also includes a filtrate discharge port 102, which is fixedly sleeved on the upper side of one side inside the main pipeline 101. A first flow control valve body 103 is fixedly sleeved on the upper side of the main pipeline 101. Epoxy resin sealing discs 104 are fixedly sleeved on both ends of the main pipeline 101. Multiple sleeve holes 105 are arranged in a filled array at equal intervals in the center of the epoxy resin sealing discs 104. Multiple hollow ultrafiltration membrane fibers 106 are fixedly sleeved on one side of the outer side of one end and on the other side of the outer side of the multiple hollow ultrafiltration membrane fibers 106 are fixedly sleeved on the other side of the multiple sleeve holes 105.

[0020] The epoxy resin sealing disc 104 is located at both ends of the main pipe 101 to provide a seal and prevent the mixing of the feed solution and the permeate. It has multiple sleeve holes 105 inside to fix the hollow fiber ultrafiltration membrane filaments 106, ensuring a good sealing effect between the membrane filaments and the sealing disc, thereby preventing the feed solution from directly seeping into the permeate. This structure effectively avoids liquid mixing during the filtration process, ensuring the purity and efficiency of the filtration process. At the same time, the closed design of the epoxy resin enhances the overall stability and sealing performance of the membrane filaments, improving the operating efficiency of the system.

[0021] As one implementation method in this embodiment, please refer to Figure 5 As shown, the raw liquid injection control component 2 includes a first conical docking cover 201. The first conical docking cover 201 is fixedly connected to the center of the end of the main pipe 101 away from the filtrate discharge port 102 near the edge. The raw liquid inlet port 202 is fixedly sleeved inside the first conical docking cover 201 at the end away from the main pipe 101. First lugs 203 are fixedly connected to both sides of the first conical docking cover 201 near the end of the main pipe 101. The two first lugs 203 have first docking holes 204 through their centers at the ends away from each other. The second flow control valve body 205 is fixedly sleeved outside the raw liquid inlet port 202 at the end away from the first conical docking cover 201.

[0022] The raw material injection control component 2 is connected to one end of the main pipeline 101 via the first conical docking cover 201. The main function of this component is to guide the raw material into the filtration system. The first conical docking cover 201 has a raw material inlet port 202 inside, which allows the raw material to effectively enter the main pipeline 101. The flow rate into the system is regulated by the second flow control valve body 205. At the same time, the second flow control valve body 205 can precisely adjust the injection volume of the raw material as needed to maintain the balance of the system and ensure that the hollow ultrafiltration membrane fiber 106 can work efficiently. This design is beneficial to achieve more precise flow control, improve ultrafiltration efficiency and reduce energy consumption.

[0023] As one implementation method in this embodiment, please refer to Figure 6 As shown, the concentrate discharge control assembly 3 includes a second conical docking cover 301, which is fixedly connected to the center of the main pipeline 101 near the edge of the filter discharge port 102. The concentrate discharge port 302 is fixedly fitted inside the second conical docking cover 301 at the end away from the main pipeline 101. Second docking lugs 303 are fixedly connected to both sides of the second conical docking cover 301 at the end near the main pipeline 101. Second docking holes 304 are opened through the two second docking lugs 303 at the ends of the two second docking lugs 303 that are far apart from each other. A third flow control valve body 305 is fixedly fitted outside the concentrate discharge port 302 at the end away from the second conical docking cover 301.

[0024] The concentrate discharge control component 3 is fixed to the other end of the main pipeline 101 via the second conical docking cover 301 to ensure smooth discharge of the concentrate. The concentrate discharge port 302 is located inside the second conical docking cover 301, and its function is to enable the filtered concentrate to be effectively discharged from the system. The third flow control valve body 305 can adjust the flow rate of the concentrate discharge to ensure the stability of the system and avoid excessive accumulation of concentrate or untimely discharge. The design of this component enables the ultrafiltration machine to effectively manage the discharge of concentrate during operation, improve the overall performance of the system and extend the service life of the membrane fibers.

[0025] As one implementation method in this embodiment, please refer to Figure 7As shown, the displacement assembly 4 includes a rack 401 and two guide rods 402. The rack 401 is fixedly connected to the center of the lower end of the main pipe 101. One end of each rack 401 is fixedly fitted inside two first mating holes 204, and the other end of each rack 401 is fixedly fitted inside two second mating holes 304. Guide grooves 403 are provided on the upper sides of both sides of the rack 401. Guide rails 404 are slidably fitted inside the two guide grooves 403. Support plates 405 are fixedly connected to the opposite sides of the two guide rails 404. Bearings 406 are fixedly fitted inside the lower part of the two support plates 405. A rotating shaft 407 is fixedly fitted inside the inner ring of the two bearings 406. A gear 408 is fixedly fitted outside the rotating shaft 407. The gear 408 and the rack 401 are meshed. The two support plates 405 are fixedly fitted with protective covers 409 on their lower outer sides. A stepper motor 4010 is fixedly connected to the center of the side of one of the support plates 405 away from the gear 408. The rotating end of the stepper motor 4010 is fixedly connected to one end of the rotating shaft 407. Multiple support rods 4011 are arranged and fixedly connected to the upper part of the side of the two support plates 405 that are far apart from each other. An arc-shaped connecting plate 4013 is fixedly connected to the upper end of the multiple support rods 4011 on one side and the multiple support rods 4011 on the other side. A sliding sleeve 4012 is fixedly connected to the center of the side of the two arc-shaped connecting plates 4013 that are far apart from each other. The two sliding sleeves 4012 are respectively slidably fitted on the outside of the two guide rods 402. The two ultrasonic generators 5 are respectively fixedly connected to the side of the two arc-shaped connecting plates 4013 that are close to each other.

[0026] The displacement component 4 achieves movement control of the outer surface of the main pipe 101 through the rack 401 and guide rod 402. The rack 401 is connected to the first docking hole 204 and the second docking hole 304, and cooperates with the guide rail 404 through the guide groove 403, making the movement of the system more precise. The transmission between the support plate 405, the rotating shaft 407, and the gear 408 enables the entire system to achieve reciprocating motion under the drive of the stepper motor 4010. The precise control of the stepper motor 4010 causes the ultrasonic generator 5 to reciprocate on the outer surface of the main pipe 101, effectively transmitting the ultrasonic cleaning effect to the membrane fiber surface, achieving the effect of cleaning the membrane fiber. This design optimizes the membrane fiber cleaning process and avoids To address the performance degradation caused by fouling, the ultrasonic generator 5 is connected to the displacement component 4 via an arc-shaped connecting plate 4013 and slides on the guide rod 402 via a sliding sleeve 4012. Its main function is to clean the surface of the membrane fibers through high-frequency vibrations generated by ultrasonic waves, removing fouling and contaminants from the membrane fibers. The frequency and vibration mode of the ultrasonic waves can effectively break the adhesion between the membrane fiber surface and the contaminants, causing the dirt particles to disperse and be washed away under the action of ultrasonic waves. Through the control of the displacement component 4, the ultrasonic generator 5 can evenly cover the surface of the membrane fibers, ensuring the uniformity and efficiency of the cleaning effect. This cleaning method not only improves the service life of the membrane fibers but also avoids the high energy consumption and complex operation of traditional cleaning methods.

[0027] Working principle: Epoxy resin sealing discs 104 are located at both ends of the main pipeline 101, serving a sealing function to prevent mixing between the feed solution and the permeate. Multiple sleeves 105 are provided inside to fix the hollow fiber ultrafiltration membrane fibers 106, ensuring a good seal between the membrane fibers and the sealing discs. This prevents the feed solution from directly seeping into the permeate. This structure effectively avoids liquid mixing during filtration, ensuring the purity and efficiency of the filtration process. Simultaneously, the closed design of the epoxy resin enhances the overall stability and sealing performance of the membrane fibers, improving the system's operating efficiency. Feed solution injection control component 2... The first conical docking cover 201 is connected to one end of the main pipe 101. The main function of this component is to guide the raw liquid into the filtration system. The first conical docking cover 201 has a raw liquid inlet 202 inside, which allows the raw liquid to enter the main pipe 101 effectively. The flow rate into the system is regulated by the second flow control valve body 205. At the same time, the second flow control valve body 205 can accurately adjust the injection volume of the raw liquid according to the needs, maintain the balance of the system, and ensure that the hollow ultrafiltration membrane fiber 106 can work efficiently. This design is beneficial to achieve more precise flow control, improve ultrafiltration efficiency, and reduce energy consumption.

[0028] The concentrate discharge control component 3 is fixed to the other end of the main pipe 101 via the second conical docking cover 301 to ensure smooth discharge of the concentrate. The concentrate discharge port 302 is located inside the second conical docking cover 301, and its function is to allow the filtered concentrate to be effectively discharged from the system. The third flow control valve body 305 can regulate the flow rate of the concentrate discharge, ensure the stability of the system, and avoid excessive accumulation of concentrate or untimely discharge. The design of this component enables the ultrafiltration machine to effectively manage the concentrate discharge during operation, improve the overall performance of the system, and extend the service life of the membrane fibers. The displacement component 4 realizes the movement control of the outer surface of the main pipe 101 through the rack 401 and the guide rod 402. The rack 401 is connected to the first docking hole 204 and the second docking hole 304, and cooperates with the guide rail 404 through the guide groove 403, making the movement of the system more precise. The transmission between the support plate 405, the rotating shaft 407, and the gear 408 enables the entire system to be driven by the stepper motor 4010. The ultrasonic generator 5 can reciprocate, and the precise control of the stepper motor 4010 enables it to move back and forth on the outer surface of the main pipe 101, effectively transmitting the ultrasonic cleaning action to the membrane fiber surface and achieving the effect of cleaning the membrane fiber. This design optimizes the membrane fiber cleaning process and avoids performance degradation caused by scale buildup. The ultrasonic generator 5 is connected to the displacement component 4 through the arc-shaped connecting plate 4013 and slides on the guide rod 402 through the sliding sleeve 4012. Its main function is to clean the membrane fiber surface through the high-frequency vibration generated by ultrasonic waves, removing scale and contaminants from the membrane fiber. The frequency and vibration mode of the ultrasonic waves can effectively break the adhesion between the membrane fiber surface and the contaminants, causing the dirt particles to disperse and be washed away under the action of ultrasonic waves. Through the control of the displacement component 4, the ultrasonic generator 5 can evenly cover the surface of the membrane fiber, ensuring the uniformity and efficiency of the cleaning effect. This cleaning method not only improves the service life of the membrane fiber but also avoids the high energy consumption and complicated operation of traditional cleaning methods.

[0029] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A self-cleaning ultrafiltration machine with a filter element, characterized in that: The system includes an ultrafiltration filtration assembly (1), which includes a main pipe (101). Multiple hollow ultrafiltration membrane fibers (106) are arranged in a ring inside the main pipe (101). Ultrasonic generators (5) for ultrasonic cleaning of the multiple hollow ultrafiltration membrane fibers (106) are provided on both sides of the outside of the main pipe (101). A raw liquid injection control assembly (2) and a concentrate discharge control assembly (3) are fixedly connected to both ends of the main pipe (101). A displacement assembly (4) for driving the two ultrasonic generators (5) to reciprocate along the outer surface of the main pipe (101) is provided at the lower end of the main pipe (101).

2. The self-cleaning ultrafiltration machine according to claim 1, characterized in that: The main pipeline (101) also includes a filtrate discharge port (102), which is fixedly sleeved on the upper side of one side inside the main pipeline (101). A first flow control valve body (103) is fixedly sleeved on the upper side outside the main pipeline (101), and epoxy resin sealing discs (104) are fixedly sleeved on both ends inside the main pipeline (101).

3. The self-cleaning ultrafiltration machine according to claim 2, characterized in that: The epoxy resin sealing disc (104) has multiple sleeve holes (105) arranged in a filled array at equal intervals at its center. The outer side of the multiple hollow ultrafiltration membrane fibers (106) is fixedly sleeved in the multiple sleeve holes (105) on one side, and the outer side of the multiple hollow ultrafiltration membrane fibers (106) is fixed in the multiple sleeve holes (105) on the other side.

4. The self-cleaning ultrafiltration machine according to claim 2, characterized in that: The raw liquid injection control component (2) includes a first conical docking cover (201). The first conical docking cover (201) is fixedly connected to the center of the main pipe (101) away from the filter outlet (102) near the edge. The raw liquid inlet (202) is fixedly sleeved inside the first conical docking cover (201) away from the main pipe (101). The first ear pieces (203) are fixedly connected to the two sides of the first conical docking cover (201) near the end of the main pipe (101). The two first ear pieces (203) are both provided with a first docking hole (204) through the center of each other. The second flow control valve body (205) is fixedly sleeved outside the raw liquid inlet (202) away from the first conical docking cover (201).

5. The self-cleaning ultrafiltration machine according to claim 2, characterized in that: The concentrate discharge control assembly (3) includes a second conical docking cover (301), which is fixedly connected to the center of the main pipe (101) near the edge of the filter discharge port (102). The concentrate discharge port (302) is fixedly fitted inside the second conical docking cover (301) at the end away from the main pipe (101). Second docking lugs (303) are fixedly connected to the two sides of the second conical docking cover (301) at the end near the main pipe (101). The two second docking lugs (303) are both provided with second docking holes (304) through their centers at the ends away from each other. A third flow control valve body (305) is fixedly fitted outside the concentrate discharge port (302) at the end away from the second conical docking cover (301).

6. The self-cleaning ultrafiltration machine according to claim 2, characterized in that: The displacement component (4) includes a rack (401) and two guide rods (402). The rack (401) is fixedly connected to the center of the lower end of the main pipe (101). One end of the two racks (401) is fixedly sleeved inside the two first docking holes (204), and the other end of the two racks (401) is fixedly sleeved inside the two second docking holes (304). Guide grooves (403) are provided on both sides of the rack (401) near the upper part. Guide rails (404) are slidably sleeved inside the two guide grooves (403).

7. A self-cleaning ultrafiltration machine according to claim 6, characterized in that: Each of the two guide rails (404) is fixedly connected to a support plate (405) on the side away from each other, and a bearing (406) is fixedly sleeved inside the lower part of each of the two support plates (405). A rotating shaft (407) is fixedly sleeved on the inner ring of each of the two bearings (406), and a gear (408) is fixedly sleeved on the outer side of the rotating shaft (407). The gear (408) and the rack (401) are meshed. A protective cover (409) is fixedly sleeved on the lower part of the outer side of each of the two support plates (405).

8. The self-cleaning ultrafiltration machine according to claim 7, characterized in that: One of the support plates (405) is fixedly connected to a stepper motor (4010) at the center of the side away from the gear (408). The rotating end of the stepper motor (4010) is fixedly connected to one end of the rotating shaft (407). Multiple support rods (4011) are arranged and fixedly connected to the upper part of the side away from each other of the two support plates (405). The upper ends of the multiple support rods (4011) on one side and the multiple support rods (4011) on the other side are fixedly connected to an arc-shaped connecting plate (4013). Sliding sleeves (4012) are fixedly connected to the center of the side away from each other of the two arc-shaped connecting plates (4013). The two sliding sleeves (4012) are respectively slidably sleeved on the outside of the two guide rods (402). The two ultrasonic generating devices (5) are respectively fixedly connected to the side of the two arc-shaped connecting plates (4013) that are close to each other.

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