Water filtering device with filter membrane self-cleaning function

Abstract

The invention discloses a water body filtering device with a filter membrane self-cleaning function, relates to the field of dispersed particle filtering equipment, and solves the problems that an existing water body filtering device is difficult to efficiently filter output water mist during use, and meanwhile, the use efficiency of a filter membrane is relatively low, the water body filtering device comprises a machine body, a filtering mechanism, a switching mechanism and a cleaning mechanism, a water storage tank and an output pipe are fixedly connected in the machine body, the filtering mechanism comprises a socketed pipe, a filter membrane pipe and a supporting pipe, and the supporting pipe and the socketed pipe are each provided with a plurality of sets of conveying holes. The supporting pipe and the filter membrane pipe are driven by the switching mechanism to move and switch positions corresponding to the socketed pipe, so that different positions of the filter membrane pipe can be used for filtering, and the filter membrane pipe which is completely used is cleaned by the cleaning mechanism, so that the filtering efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dispersed particle filtration equipment, and in particular to a water filtration device with a self-cleaning function for filter membranes. Background Technique

[0002] In industrial production and daily life, it is often necessary to filter water bodies, water mists, and gases to meet various requirements such as environmental protection, production processes, and air quality improvement. When using a humidifier, the liquid generates water mist after vibration and drifts into the air. Since the inside of the machine body is in a closed and humid environment for a long time, it is easy to breed bacteria and residual dust and other dispersed particles. The output of this part of the water mist will adsorb some of the dispersed particles distributed in the air inside the equipment, making the water mist output to the outside not clean enough, and it is easy to cause certain harm after inhalation.

[0003] Existing filtration equipment often has a single function and can only filter the water body inside the equipment, while ignoring the filtration of dispersed particles in the air inside the equipment. The internal bacteria breed and drift into the outside air with the aerosol, which harms human health. Moreover, impurities continuously accumulate on the surface and inside of the filter membrane during use. After long-term use, problems such as poor filtration, reduced filtration speed, weakened filtration effect, and shortened service life will occur. Summary of the Invention

[0004] The purpose of the present invention is to provide a water filtration device with a self-cleaning function for filter membranes that is convenient for improving the water filtration efficiency and extending the service life of the filter membrane, so as to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A water filtration device with a self-cleaning function for filter membranes, including a machine body, a filtration mechanism, a switching mechanism, and a cleaning mechanism. A water storage tank is fixedly connected inside the machine body, and an output pipe is fixedly connected to the machine body. The filtration mechanism includes a sleeve pipe fixedly installed on the output pipe. A filter membrane pipe is slidably connected inside the sleeve pipe. A support pipe is fixedly connected to the inner wall of the filter membrane pipe. Multiple groups of conveying holes are respectively opened on the support pipe and the sleeve pipe. The filtration mechanism can support the filter membrane pipe through the support pipe, so that the water mist generated in the water storage tank can be conveyed through the conveying holes and filtered through the filter membrane pipe. The switching mechanism is installed inside the machine body and is used to drive the support pipe and the filter membrane pipe to move, switching the position corresponding to the sleeve pipe, so that different positions of the filter membrane pipe can be used for filtration. The cleaning mechanism is installed inside the machine body and is used to clean the completely used filter membrane pipe, which is convenient for improving the water filtration efficiency and extending the use of the filter membrane.

[0006] Preferably, the filtering mechanism further includes a first pipe fixedly installed at the upper end of the sleeve pipe. The inner wall of the first pipe is movably sleeved with the outer wall of the filter membrane pipe. The top end of the water storage tank is fixedly connected with a collecting pipe. A connecting pipe is rotatably connected to the collecting pipe. The outer wall of the connecting pipe is movably sleeved with a threaded pipe that can be threadedly connected to the outer wall of the top end of the first pipe. A conveying member for conveying water mist is provided inside the machine body, which facilitates supporting the filter membrane pipe through the support pipe, enabling the water mist generated in the water storage tank to be conveyed through the conveying holes and filtered by the filter membrane pipe.

[0007] Preferably, the conveying member includes an electric telescopic rod fixedly installed inside the machine body. The telescopic end of the electric telescopic rod is fixedly connected with a lifting rod. The top end of the lifting rod is fixedly connected with a driving block. The outer wall of the driving block is slidably fitted with the inner wall of the support pipe. The bottom end of the sleeve pipe is fixedly connected with a second pipe. The top end of the support pipe is fixedly connected with a sealing pipe that can be slidably fitted with the inner walls of the first pipe and the second pipe, facilitating the conveyance of water mist.

[0008] Preferably, the switching mechanism includes a lifting ring installed inside the machine body. The top surface of the lifting ring is fixedly connected with a lifting pipe. The bottom of the support pipe is fixedly connected with a threaded ring that is threadedly connected to the inner wall of the lifting pipe. The bottom of the lifting ring is fixedly connected with a threaded rod. A lifting member for driving the threaded rod to move up and down is provided inside the machine body, facilitating driving the support pipe and the filter membrane pipe to move and switching the position corresponding to the sleeve pipe, so that different positions of the filter membrane pipe can be used for filtering.

[0009] Preferably, the lifting member includes a driving motor fixedly installed inside the machine body. The output end of the driving motor is coaxially fixedly connected with a driving gear. A threaded cylinder is rotatably connected inside the machine body. The inner wall of the threaded cylinder is threadedly connected with the outer wall of the threaded rod. The outer wall of the bottom end of the threaded cylinder is fixedly connected with an external tooth ring that meshes with the driving gear, facilitating driving the threaded rod to move up and down.

[0010] Preferably, the cleaning mechanism includes a cleaning cylinder fixedly installed inside the machine body. The top end of the cleaning cylinder is communicated and connected with the bottom end of the second pipe. The electric telescopic rod penetrates through the bottom of the cleaning cylinder and is fixedly connected with the cleaning cylinder. The threaded cylinder penetrates through the bottom of the cleaning cylinder and is rotatably connected with the cleaning cylinder. An ultrasonic generator is fixedly connected inside the cleaning cylinder, facilitating cleaning the filter membrane pipe that has been completely used.

[0011] Preferably, a delivery pump is fixedly connected to the cleaning cylinder. The input end of the delivery pump is connected in communication with a suction pipe, the suction pipe is communicated with the water storage tank, and the output end of the delivery pump is communicated with the cleaning cylinder, facilitating pumping the remaining water in the water storage tank into the cleaning cylinder for use.

[0012] Preferably, a pumping pipe is fixedly connected inside the water storage tank. The top end of the pumping pipe is fixedly connected with an atomizer, and a one-way valve for controlling the one-way input of water mist from the water storage tank into the support pipe is fixedly connected inside the connecting pipe, facilitating the atomized delivery of water.

[0013] Preferably, a bellows is fixedly connected to the bottom surface of the lifting ring, and the bottom end of the bellows is rotatably connected to the top end of the threaded cylinder, facilitating sealing around the threaded rod and preventing liquid from flowing out through the gap between the threaded rod and the threaded cylinder.

[0014] Preferably, a water inlet pipe is connected in communication with the water storage tank, and a water outlet pipe is connected in communication with the side surface of the cleaning cylinder, facilitating the delivery of water.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: A water body filtering device with a self-cleaning function for filter membranes provided by the present invention solves the problems that it is difficult to efficiently filter the output water mist and the filter membrane has a low usage efficiency when the existing water body filtering device is in use. Through the filtering mechanism, the support pipe supports the filter membrane tube, the water mist generated in the water storage tank can be transported through the delivery holes and filtered through the filter membrane tube. Through the switching mechanism, the support pipe and the filter membrane tube are driven to move, switching the position corresponding to the sleeve pipe, so that different positions of the filter membrane tube can be used for filtering. Through the cleaning mechanism, the completely used filter membrane tube is cleaned, improving the filtering efficiency and extending the service life of the filter membrane tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the internal structure of the machine body of the present invention; Figure 3 is a schematic diagram of a partial structure of the filtering mechanism of the present invention; Figure 4 is Figure 3 an enlarged view of area A in Figure 5 is a schematic diagram of a partial structure of the cleaning mechanism of the present invention; Figure 6 is Figure 5 an enlarged view of area B in Figure 7 is a schematic diagram of a partial structure of the switching mechanism of the present invention; Figure 8 is Figure 7 an enlarged view of area C in Figure 9 is Figure 7 an enlarged view of area D in Figure 10 a partial structural cross-sectional view of the filtering mechanism of the present invention.

[0017] In the figure: 1 - body; 2 - water storage tank; 3 - output pipe; 4 - filtering mechanism; 5 - sleeve pipe; 6 - filter membrane pipe; 7 - support pipe; 8 - conveying hole; 9 - first pipe; 10 - collecting pipe; 11 - connecting pipe; 12 - threaded pipe; 13 - conveying member; 14 - electric telescopic rod; 15 - lifting rod; 16 - driving block; 17 - second pipe; 18 - sealing pipe; 19 - lifting ring; 20 - lifting pipe; 21 - threaded ring; 22 - threaded rod; 23 - lifting member; 24 - driving motor; 25 - driving gear; 26 - threaded cylinder; 27 - external tooth ring; 28 - cleaning cylinder; 29 - ultrasonic generator; 31 - conveying pump; 32 - suction pipe; 33 - one-way valve; 35 - bellows; 36 - water inlet pipe; 37 - water outlet pipe; 38 - switching mechanism; 39 - cleaning mechanism; 40 - pumping pipe; 41 - atomizer. Specific Embodiment

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1 - 10 , the present invention provides a technical solution: a water filtering device with a self-cleaning function of a filter membrane, including a body 1, a filtering mechanism 4, a switching mechanism 38 and a cleaning mechanism 39. A water storage tank 2 is fixedly connected inside the body 1, and an output pipe 3 is fixedly connected to the body 1. The filtering mechanism 4 includes a sleeve pipe 5 fixedly installed on the output pipe 3. A filter membrane pipe 6 is slidably connected inside the sleeve pipe 5. A support pipe 7 is fixedly connected to the inner wall of the filter membrane pipe 6. Multiple groups of conveying holes 8 are respectively opened on both the support pipe 7 and the sleeve pipe 5. The filtering mechanism 4 can support the filter membrane pipe 6 through the support pipe 7, so that the water mist generated in the water storage tank 2 can be conveyed through the conveying holes 8 and filtered through the filter membrane pipe 6. The switching mechanism 38 is installed inside the body 1 and is used to drive the support pipe 7 and the filter membrane pipe 6 to move, switch the position corresponding to the sleeve pipe 5, so that different positions of the filter membrane pipe 6 can be used for filtering. The cleaning mechanism 39 is installed inside the body 1 and is used to clean the filter membrane pipe 6 that has been completely used.

[0020] The filtering mechanism 4 further includes a first pipe 9 fixedly installed at the upper end of the sleeve pipe 5. The inner wall of the first pipe 9 is movably sleeved with the outer wall of the filter membrane pipe 6. The top end of the water storage tank 2 is fixedly connected with a collecting pipe 10. A connecting pipe 11 is rotatably connected to the collecting pipe 10. The outer wall of the connecting pipe 11 is movably sleeved with a threaded pipe 12 that can be threadedly connected to the outer wall of the top end of the first pipe 9. A conveying member 13 for conveying water mist is provided in the machine body 1.

[0021] The conveying member 13 includes an electric telescopic rod 14 fixedly installed inside the machine body 1. The telescopic end of the electric telescopic rod 14 is fixedly connected with a lifting rod 15. The top end of the lifting rod 15 is fixedly connected with a driving block 16. The outer wall of the driving block 16 is slidably fitted with the inner wall of the support pipe 7. The bottom end of the sleeve pipe 5 is fixedly connected with a second pipe 17. The top end of the support pipe 7 is fixedly connected with a sealing pipe 18 that can be slidably fitted with the inner walls of the first pipe 9 and the second pipe 17. A pumping pipe 40 is fixedly connected inside the water storage tank 2. The top end of the pumping pipe 40 is fixedly connected with an atomizer 41. A one-way valve 33 for controlling the one-way input of water mist from the water storage tank 2 into the support pipe 7 is fixedly connected inside the connecting pipe 11.

[0022] The switching mechanism 38 includes a lifting ring 19 installed inside the machine body 1. The top surface of the lifting ring 19 is fixedly connected with a lifting pipe 20. The bottom of the support pipe 7 is fixedly connected with a threaded ring 21 that is threadedly connected to the inner wall of the lifting pipe 20. The bottom of the lifting ring 19 is fixedly connected with a threaded rod 22. A lifting member 23 for driving the threaded rod 22 to move up and down is provided in the machine body 1.

[0023] The lifting member 23 includes a driving motor 24 fixedly installed inside the machine body 1. The model of the driving motor 24 is preferably a 42BYGH34 stepping motor. The output end of the driving motor 24 is coaxially fixedly connected with a driving gear 25. A threaded cylinder 26 is rotatably connected inside the machine body 1. The inner wall of the threaded cylinder 26 is threadedly connected with the outer wall of the threaded rod 22. The bottom outer wall of the threaded cylinder 26 is fixedly connected with an external tooth ring 27 that meshes with the driving gear 25. The bottom surface of the lifting ring 19 is fixedly connected with a corrugated pipe 35. The bottom end of the corrugated pipe 35 is rotatably connected with the top end of the threaded cylinder 26.

[0024] The cleaning mechanism 39 includes a cleaning cylinder 28 fixedly installed inside the machine body 1. A water inlet pipe 36 is connected to the water storage tank 2 in a communicating manner. A water outlet pipe 37 is connected to the side of the cleaning cylinder 28 in a communicating manner. The top end of the cleaning cylinder 28 is connected to the bottom end of the second pipe 17 in a communicating manner. The electric telescopic rod 14 penetrates through the bottom of the cleaning cylinder 28 and is fixedly connected with the cleaning cylinder 28. The threaded cylinder 26 penetrates through the bottom of the cleaning cylinder 28 and is rotatably connected with the cleaning cylinder 28. An ultrasonic generator 29 is fixedly connected inside the cleaning cylinder 28. A delivery pump 31 is fixedly connected to the cleaning cylinder 28. The input end of the delivery pump 31 is connected to a suction pipe 32 in a communicating manner. The suction pipe 32 is communicated with the water storage tank 2. The output end of the delivery pump 31 is communicated with the cleaning cylinder 28.

[0025] Working principle: The water body to be processed is injected into the water storage tank 2 through the water inlet pipe 36. The atomizer 41 is started to atomize the water bodies in the pumping pipe 40 and the water storage tank 2 and output them into the collecting pipe 10 at the top. Then, they are transported to the first pipe 9 and the sealing pipe 18 through the connecting pipe 11 and the one-way valve 33. The water mist is output to the filter membrane pipe 6 through the delivery holes 8 on the support pipe 7, and after filtration, it is output to the output pipe 3 through the delivery holes 8 on the sleeve pipe 5 for discharge. At this time, after passing through the filter membrane pipe 6, the particles of the water mist are finer, and at the same time, the remaining dispersed particles and bacteria and microorganisms inside will be blocked inside the filter membrane pipe 6, improving the cleanliness of the output aerosol.

[0026] The electric telescopic rod 14 drives the lifting rod 15 and the driving block 16 to reciprocate up and down. The position where the driving block 16 reciprocates up and down is always inside the second pipe 17. Therefore, when the driving block 16 moves downward, the water mist in the connecting pipe 11 can be pumped into the sealing pipe 18 after passing through the one-way valve 33, and when the driving block 16 moves upward, the water mist between the support pipe 7 and the one-way valve 33 is pressurized, so that the water mist is discharged through the delivery holes 8 around the support rod and is output to the outside after filtration.

[0027] The driving motor 24 drives the driving gear 25 to rotate, and the driving gear 25 drives the external tooth ring 27 to make the threaded barrel 26 rotate, so that the threaded rod 22 and the lifting ring 19 are lifted and lowered together. When the lifting ring 19 and the lifting pipe 20 move downward together, the lifting pipe 20 drives the support pipe 7 and the filter membrane pipe 6 to move downward together, and the position where the filter membrane pipe 6 fits with the inner wall of the sleeve pipe 5 can be switched. Since the upper and lower ends of the sleeve pipe 5 are respectively provided with the first pipe 9 and the second pipe 17 for sealing, when the filter membrane pipe 6 is not aligned with the sleeve pipe 5, the aerosol cannot be filtered and transported through the filter membrane pipe 6. Only at the sleeve pipe 5 can the corresponding aerosol be transported and filtered. During use, gradually control the support pipe 7 and the filter membrane pipe 6 to move downward slowly to switch the use position of the filter membrane pipe 6. When the top of the filter membrane pipe 6 is flush with the top of the sleeve pipe 5, it means that the entire filter membrane pipe 6 has been completely used, and then a cleaning operation can be carried out. In this way, switching the filter membrane pipe 6 can avoid the problem of the short service life of the filter membrane at the traditional fixed position. Setting the filter membrane pipe 6 to be two to three times the length of the sleeve pipe 5 can extend the service life of the filter membrane pipe 6 in the equipment by more than two to three times, reduce the replacement frequency, and at the same time, it can always ensure a relatively stable filtration efficiency and avoid the situation of poor filtration effect caused by long-term use at a single position.

[0028] After the whole filter membrane tube 6 has been used, the electric telescopic rod 14 is used to control the driving block 16 to move down to the lowest position. At the same time, the driving motor 24 is controlled to rotate rapidly, driving the lifting tube 20 and the filter membrane tube 6 to move down rapidly together until the filter membrane tube 6 is completely immersed in the cleaning liquid in the cleaning cylinder 28. Thereafter, high-frequency sound wave vibrations are emitted by the ultrasonic generators 29 around, so that the cleaning liquid vibrates and cleans the inside and outside of the filter membrane tube 6, discharging the internal impurity particles into the cleaning cylinder 28. At the same time, the microorganisms in the filter membrane tube 6 are disinfected by the cleaning liquid. By controlling the lifting and lowering movement of the driving block 16 through the electric telescopic rod 14, the inner wall of the support tube 7 can be friction-cleaned. After the cleaning is completed, the driving motor 24 is controlled to drive the driving gear 25 to rotate in the reverse direction, so that the cleaned filter membrane tube 6 can be moved up to the topmost position, keeping the bottom end of the filter membrane tube 6 aligned with the side of the sleeve connection tube 5. Then, by controlling the driving block 16 to move up and reciprocate up and down, the filtering operation can be carried out through the side surface of the bottom end of the cleaned filter membrane tube 6.

[0029] When the atomizing device is in use, there is often a problem that the water body in the water storage tank 2 is too much, and it remains in the device continuously without further use and breeds bacteria. The sewage in the cleaning cylinder 28 can be discharged first, and then the remaining water body in the water storage tank 2 is directly pumped into the cleaning cylinder 28 by the delivery pump 31 to inject cleaning liquid and disinfectant, so that the original water body in the water storage tank 2 can be reused, which is convenient for later cleaning operations. At the same time, it also avoids the problem that the water body in the water storage tank 2 continuously accumulates and cannot be completely consumed, resulting in the breeding of bacteria.

[0030] When the filter membrane tube 6 needs to be replaced, the threaded tube 12 is rotated to release the connection state between the connecting tube 11 and the top end of the first pipe 9. The connecting tube 11 is rotated around the top end of the collecting tube 10, and the structure inside the first pipe 9 can be exposed. The sealing tube 18 is rotated to drive the support tube 7 to drive the threaded ring 21 to rotate and release the connection state with the bottom lifting tube 20, so that the support tube 7, the sealing tube 18 and the filter membrane tube 6 can be taken out of the first pipe 9 together. The filter membrane tube 6 is removed and a new filter membrane tube 6 is sleeved on the support tube 7. Then, the whole of the support tube 7 and the filter membrane tube 6 is inserted into the first pipe 9. The sealing tube 18 is rotated to connect and fix the threaded ring 21 with the lifting tube 20. The connecting tube 11 is rotated and the threaded tube 12 is connected with the top end of the first pipe 9 to complete the replacement operation.

[0031] It should be noted that: the device can also filter gases, that is, the gas to be treated is stored in the water storage tank 2, or the waste gas to be treated is continuously input through the water inlet pipe 36. The gas can also be sucked into the filter membrane tube 6 under the suction action of the driving block 16 and discharged through the output pipe 3, realizing the filtering function of the dispersed particles in the gas.

[0032] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0033] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water filtering device with a membrane self-cleaning function, characterized in that: include: A machine body (1), wherein a water storage tank (2) is fixedly connected inside the machine body (1), and an output pipe (3) is fixedly connected to the machine body (1); Also includes: A filtering mechanism (4), the filtering mechanism (4) comprising a sleeve tube (5) fixedly mounted on the output tube (3), a filter membrane tube (6) being slidably connected inside the sleeve tube (5), a support tube (7) being fixedly connected to the inner wall of the filter membrane tube (6), a plurality of groups of conveying holes (8) being respectively provided on the support tube (7) and the sleeve tube (5), the filtering mechanism (4) being able to support the filter membrane tube (6) through the support tube (7), so that the water mist generated in the water storage tank (2) can be conveyed through the conveying holes (8) and filtered by the filter membrane tube (6); a switching mechanism (38), the switching mechanism (38) being installed inside the machine body (1) and being used to drive the support tube (7) and the filter membrane tube (6) to move and switch positions corresponding to the sleeve tube (5), so that different positions of the filter membrane tube (6) can be used for filtering; A cleaning mechanism (39), the cleaning mechanism (39) being installed inside the machine body (1) and being used to clean the filter membrane tube (6) after it has been completely used.

2. A water filtering device with a membrane self-cleaning function according to claim 1, characterized in that: The filtering mechanism (4) further comprises a first pipe (9) fixedly mounted on the upper end of the sleeve pipe (5), the inner wall of the first pipe (9) being movably sleeved with the outer wall of the filter membrane tube (6), the top end of the water storage tank (2) being fixedly connected with a collecting pipe (10), the collecting pipe (10) being rotatably connected with a connecting pipe (11), the outer wall of the connecting pipe (11) being movably sleeved with a threaded pipe (12) capable of being threadably connected with the outer wall of the top end of the first pipe (9), and a conveying member (13) for conveying water mist is provided in the machine body (1).

3. A water filtering device with a membrane self-cleaning function according to claim 2, characterized in that: The conveying member (13) comprises an electric telescopic rod (14) fixedly mounted inside the machine body (1); the telescopic end of the electric telescopic rod (14) is fixedly connected to a lifting rod (15); the top end of the lifting rod (15) is fixedly connected to a driving block (16); the outer wall of the driving block (16) is slidably fitted with the inner wall of the support tube (7); the bottom end of the sleeve tube (5) is fixedly connected to a second pipe (17); and the top end of the support tube (7) is fixedly connected to a sealing pipe (18) capable of slidably fitting with the inner walls of the first pipe (9) and the second pipe (17).

4. A water filtering device with a membrane self-cleaning function according to claim 3, characterized in that: The switching mechanism (38) comprises a lifting ring (19) installed inside the machine body (1); the top surface of the lifting ring (19) is fixedly connected to a lifting tube (20); the bottom of the support tube (7) is fixedly connected to a threaded ring (21) threadedly connected to the inner wall of the lifting tube (20); the bottom of the lifting ring (19) is fixedly connected to a threaded rod (22); and a lifting member (23) for driving the threaded rod (22) to move up and down is provided inside the machine body (1).

5. A water filtering device with a membrane self-cleaning function according to claim 4, characterized in that: The lifting member (23) comprises a driving motor (24) fixedly mounted inside the machine body (1); the output end of the driving motor (24) is coaxially fixedly connected to a driving gear (25); a threaded barrel (26) is rotatably connected inside the machine body (1); the inner wall of the threaded barrel (26) is threadedly connected to the outer wall of the threaded rod (22); and the outer wall of the bottom end of the threaded barrel (26) is fixedly connected to an outer toothed ring (27) meshing with the driving gear (25).

6. A water filtering device with a membrane self-cleaning function according to claim 5, characterized in that: The cleaning mechanism (39) comprises a cleaning cylinder (28) fixedly mounted inside the machine body (1); the top end of the cleaning cylinder (28) is connected to the bottom end of the second pipe (17); the electric telescopic rod (14) passes through the bottom of the cleaning cylinder (28) and is fixedly connected to the cleaning cylinder (28); the threaded cylinder (26) passes through the bottom of the cleaning cylinder (28) and is rotatably connected to the cleaning cylinder (28); and an ultrasonic generator (29) is fixedly connected inside the cleaning cylinder (28).

7. The water filtering device with membrane self-cleaning function according to claim 6, characterized in that: A delivery pump (31) is fixedly connected to the cleaning cylinder (28); the input end of the delivery pump (31) is connected to a suction pipe (32); the suction pipe (32) is connected to the water storage tank (2); and the output end of the delivery pump (31) is connected to the cleaning cylinder (28).

8. The water filtering device with membrane self-cleaning function according to claim 2, characterized in that: A pumping pipe (40) is fixedly connected to the water storage tank (2), an atomizer (41) is fixedly connected to the top end of the pumping pipe (40), and a one-way valve (33) for controlling the one-way input of water mist from the water storage tank (2) into the support pipe (7) is fixedly connected to the connecting pipe (11).

9. The water filtering device with membrane self-cleaning function according to claim 5, characterized in that: A bellows (35) is fixedly connected to the bottom surface of the lifting ring (19), and the bottom end of the bellows (35) is rotatably connected to the top end of the threaded cylinder (26).

10. The water filtering device with membrane self-cleaning function according to claim 6, characterized in that: The water storage tank (2) is connected to a water inlet pipe (36), and the side of the cleaning cylinder (28) is connected to a water outlet pipe (37).

Images