Filtering devices with cleanable filter membranes

Abstract

This invention relates to a filtration device for cleaning filter membranes, comprising a barrel, a spindle, a purified water output pipe, a plurality of filter membranes, and a plurality of cleaning components. The spindle is rotatably disposed within the barrel and is fixedly provided with a support. The purified water output pipe is disposed within the barrel and extends out of the barrel. The plurality of filter membranes are fixedly fixed at intervals inside the barrel and are provided with water inlet openings surrounding the purified water output pipe. The plurality of cleaning components are connected to the spindle, and each cleaning component has a base and an extension arm extending from the base. The extension arm is located between two adjacent filter membranes. While the filter membranes filter wastewater, the bases of the plurality of cleaning components are stacked, and one of them engages with the support on the spindle, so that the spindle can drive the cleaning component to rotate, and the extension arm scrapes away dirt from the surface of the filter membrane.

Description

[Technical Field]

[0001] This invention relates to a filtration device, and more particularly to a filtration device that can clean the filter membrane. [Previous Technology]

[0002] An existing filtration device uses a filter membrane. Industrial wastewater can be filtered through the filter membrane, and various impurities such as oil are intercepted on the filter membrane. Clean water passes through the filter membrane and is collected, thereby achieving the filtration effect.

[0003] When impurities are intercepted on the filter membrane and not cleaned, they may clog the pores on the filter membrane, resulting in reduced filtration efficiency or even loss of filtration function. Therefore, existing filtration equipment usually attempts to remove dirt from the filter membrane by impacting the surface of the filter membrane with pressurized fluid. However, the method of impacting the filter membrane with fluid can only be carried out before and after filtration. The dirt adheres to the filter membrane for a long time, and the cleaning effect is actually quite limited. Moreover, the impact method can easily cause the filter membrane to break and be scrapped directly. [Summary of the Invention]

[0004] In order to solve the problem that the cleaning method of using fluid to impact the surface of the filter membrane has limited cleaning effect and is prone to causing filter membrane breakage, the purpose of this invention is to provide a filter device that can effectively remove dirt and reduce the probability of filter membrane damage.

[0005] The cleaning filter membrane proposed by the present invention to solve the technical problem includes: a barrel body having an inlet and an outlet communicating with the interior of the barrel body; a spindle rotatably disposed in the barrel body and having a defined axial direction. At least one purified water output pipe is disposed inside the tank and extends outside the tank body, the purified water output pipe having a plurality of water inlet holes through its pipe wall; and a plurality of filter membranes fixed inside the tank body and arranged at intervals along the axial direction of the mandrel, each filter membrane having at least one water inlet opening surrounding the pipe wall of the purified water output pipe, allowing liquid to enter the filter membrane through filtration and from the filter membrane through the water inlet opening and the water inlet holes into the purified water output pipe; and a plurality of cleaning components, each cleaning component connected to the mandrel and having at least one extension arm, the extension arm of each cleaning component being located between two adjacent filter membranes, the cleaning component being able to rotate driven by the mandrel, thereby scraping the surface of the filter membrane with the extension arm.

[0006] The improved effect of the technical means of the present invention is that: by driving the plurality of cleaning components to rotate through the spindle, the surface of the filter membrane can be scraped by the extension arm of the cleaning component during the filtration process, and the attached dirt can be scraped off in time. Compared with the existing filtration equipment that cleans the surface of the filter membrane by pressurized fluid impact, the cleaning effect of the extension arm scraping in time is better, and it is also less likely to damage the filter membrane. Therefore, the maintenance cycle of the filter membrane can be extended, and the service life of the filter membrane can also be extended, thereby saving maintenance and repair costs.

Implementation Method

[0008] In order to understand the technical features and practical effects of the present invention in detail, and to implement it according to the invention, the preferred embodiments shown in the figures are described in detail below:

[0009] As shown in Figures 1, 3, 4 and 6, a preferred embodiment of the filter device with a cleanable filter membrane of the present invention includes a barrel 10, a spindle 20, two purified water output pipes 30, a plurality of filter membranes 41 and a plurality of cleaning components 42. The spindle 20, the purified water output pipes 30, the plurality of filter membranes 41 and the plurality of cleaning components 42 are disposed inside the barrel 10. The filter membranes 41 are used to filter wastewater input into the barrel 10, the cleaning components 42 are used to clean the filter membranes 41, the two purified water output pipes 30 are used to output the filtered purified water, and the spindle 20 is used to drive the cleaning components 42.

[0010] As shown in Figures 1 to 3, the barrel 10 is provided with an inlet 11 and an outlet 12. The inlet 11 and the outlet 12 are respectively connected to the interior of the barrel 10. Wastewater to be filtered can be input into the interior of the barrel 10 through the inlet 11, while sewage containing various impurities can be discharged through the outlet 12. Valves can be provided at the inlet 11 and the outlet 12 to control the amount of wastewater filtered inside the barrel 10 and the filtration time. The inlet 11 and the outlet 12 can be connected to pumps to provide the pressure required for liquid flow.

[0011] As shown in Figures 4, 5 and 7, the mandrel 20 is disposed inside the barrel 10 and has a defined axial direction. The mandrel 20 can be driven to rotate. Specifically, one end of the mandrel 20 extends from the top of the barrel 10 and can be connected to a motor to be driven to rotate. As shown in Figures 5 to 8, the mandrel 20 extends from the top of the barrel 10 to the bottom of the barrel 10 and can be formed by a plurality of rods sequentially joined together. Specifically, it can be formed by different methods such as structural interlocking and bolt fixing. Other details about the mandrel 20 can be referred to in the prior art, and will not be elaborated here.

[0012] As shown in Figures 4, 5, and 7, the two purified water output pipes 30 are located inside the tank 10 and extend from the top of the tank 10. The purified water filtered by the filter membrane 41 can be output through the purified water output pipes 30. The portion of the purified water output pipe 30 extending out of the tank 10 can be connected to a pump to provide pressure to guide the purified water to another location for storage or use. As shown in Figures 5 and 6, each purified water output pipe 30 can specifically consist of two interlocking pipes, one of which extends out of the tank 10.

[0013] As shown in Figures 4, 5 and 7, the plurality of filter membranes 41 are fixed inside the barrel 10 and are arranged at intervals along the axial direction of the spindle 20. Specifically, as shown in Figures 5 to 9, the barrel 10 is provided with two positioning plates 400 and a plurality of positioning posts 401. Each positioning plate 400 is provided with a plurality of holes for bolts to pass through. Each filter membrane 41 is provided with holes near its periphery for the plurality of positioning posts 401 to pass through. The plurality of filter membranes 41 are connected by passing through the plurality of positioning posts 401 and bolts are used to pass through the positioning plates 400 and screw them to the positioning posts 401, thereby fixing the plurality of filter membranes 41 between the two positioning plates 400.

[0014] As shown in Figures 5 and 7, the two positioning plates 400 are respectively located near the top and bottom of the barrel 10, and are positioned by protruding posts inside the barrel 10, thereby positioning the plurality of filter membranes 41 inside the barrel 10. In other embodiments, the existing methods of fixing filter membranes inside the barrel can also be referred to, and are not limited to the preferred embodiment of the present invention.

[0015] As shown in Figures 9 and 13, in a preferred embodiment of the present invention, each filter membrane 41 includes two first sheets 41A, a second sheet 41B, and two water inlet openings 411. The periphery of the two first sheets 41A is sealed together, allowing high-frequency waves to pass through. The second sheet 41B is located between the two first sheets 41A. The water inlet openings 411 penetrate the two first sheets 41A and the second sheet 41B. Each water inlet opening 411 surrounds the wall of one of the corresponding water purification output pipes 30. Each water purification output pipe 30 has a plurality of water inlet holes 31 on its wall.

[0016] Specifically, the first sheet 41A is a filter material with corresponding pores. Wastewater filtered through the first sheet 41A enters between the two first sheets 41A and can be guided along the second sheet 41B to the water inlet opening 411. The second sheet 41B can be made of an absorbent material to absorb the purified water, or it can be a non-absorbent material, allowing the purified water to flow along the second sheet 41B. Then, the purified water can flow from the water inlet opening 411 to the wall of the purified water output pipe 30, and enter the purified water output pipe 30 through the water inlet hole 31, thereby being output to the outside. In this way, purified water can be filtered from wastewater and taken out for use.

[0017] In other embodiments, as long as the filter membrane 41 has the water inlet opening 411 surrounding the purified water output pipe 30, so that the filtered purified water can enter the purified water output pipe 30 from the filter membrane 41 through the water inlet opening 411 and the water inlet hole 31, the effect of exporting the filtered purified water can be achieved. The design of the filter membrane 41 is not limited to the combination of the two first pieces 41A and the second pieces 41B.

[0018] As shown in Figures 5, 7 and 9, each of the cleaning components 42 is connected to the spindle 20 and is provided with at least one extension arm 422. The extension arm 422 is disposed between two adjacent filter membranes 41. Each of the cleaning components 42 can be rotated by the spindle 20, thereby scraping the surface of the filter membrane 41 with the extension arm 422 to keep the surface of the filter membrane 41 clean and ensure its filtration function.

[0019] Specifically, after filtering industrial wastewater, dirt will adhere to the surface of the plurality of filter membranes 41, causing the filter pores to become clogged, reducing the filtration efficiency of the filter membranes 41 or even causing them to lose their filtration function. For example, when treating wastewater from the wafer grinding process, the surface of the filter membranes 41 will be covered with oil after filtration. The present invention can drive the plurality of cleaning components 42 to rotate through the spindle 20 while the plurality of filter membranes 41 are filtering wastewater, so that the extension arm 422 of the cleaning component 42 can be driven to sweep across most of the surface of the filter membranes 41, and immediately scrape off the dirt adhering to the surface of the filter membranes 41.

[0020] The present invention drives the plurality of cleaning components 42 to rotate through the spindle 20. When the filter membrane 41 is filtering, the surface of the filter membrane 41 can be scraped by the extension arm 422 of the cleaning component 42, and the attached dirt can be scraped off in time. Compared with the existing filtration equipment that cleans the surface of the filter membrane by pressurized fluid impact, a better cleaning effect can be obtained, and the filter membrane 41 is less likely to be damaged. In this way, the maintenance cycle of the filter membrane 41 can be extended, and the service life of the filter membrane 41 can also be extended, thereby saving maintenance and repair costs.

[0021] Further, as shown in Figures 5 to 9, each cleaning component 42 includes a base 421, which is sleeved on the spindle 20 and located within the range of the central opening 412. The bases 421 of the plurality of cleaning components 42 are stacked together. The spindle 20 is also provided with a limiting ring 21 and a bearing 22, which are respectively close to the top and bottom of the spindle 20. The limiting ring 21 is positioned on one of the rods of the spindle 20 by bolts, and the bearing 22 is fixed to another rod of the spindle 20 by bolts or other means. The bases 421 of the plurality of cleaning components 42 are limited between the limiting ring 21 and the bearing 22, and the bearing 22 can engage with the base 421 of one of the cleaning components 42. Thus, when the spindle 20 rotates, the plurality of stacked cleaning components 42 can be rotated simultaneously.

[0022] Specifically, as shown in FIG10, each of the cleaning components 42 includes a plurality of insertion portions 425 and a plurality of recesses 426. The plurality of insertion portions 425 and the plurality of recesses 426 are respectively disposed on both sides of the base 421, and the plurality of insertion portions 425 can be inserted into the plurality of recesses 426 of another adjacent cleaning component 42, so that the bases 421 of the plurality of cleaning components 42 are stacked and connected. The support 22 is provided with a plurality of insertion recesses, wherein the insertion portion 425 of one of the cleaning components 42 is inserted into the insertion recess of the support 22, thereby engaging with the support 22. When the spindle 20 is driven to rotate, the plurality of cleaning components 42 are driven by the spindle 20 and rotate synchronously.

[0023] In other embodiments, each of the cleaning components 42 can also be fixed to the spindle 20 by screws or other means, and can also be rotated by the spindle 20. In the preferred embodiment of the present invention, the bases 421 of the plurality of cleaning components 42 are stacked and engaged with the support 22, which makes the assembly and disassembly simple and does not require additional fasteners, thus saving time and manpower for assembly and disassembly, and reducing product costs.

[0024] Furthermore, as shown in FIG9, in a preferred embodiment of the present invention, each of the filter membranes 41 is provided with a central opening 412 at its center. The spindle 20 passes through the central opening 412 of the plurality of filter membranes 41, and the base 421 of the plurality of cleaning components 42 is located within the range of the central opening 412. In this way, the spindle 20 and the plurality of cleaning components 42 can be directly disposed at the plurality of filter membranes 41 without interfering with the plurality of filter membranes 41 during rotation. The filter membranes 41 with a larger area can be selected to improve the filtration efficiency.

[0025] Furthermore, as shown in FIG9, in a preferred embodiment of the present invention, the extension arm 422 is provided with a wiping cloth 423, which abuts against the surface of the corresponding filter membrane 41. When the spindle 20 drives the cleaning component 42 to rotate, the extension arm 422 can scrape off dirt with the wiping cloth 423. In other embodiments, the extension arm 422 can also be directly abutted against the surface of the filter membrane 41 to achieve the same cleaning effect. However, in the preferred embodiment of the present invention, the wiping cloth 423 is used. After being covered with dirt, the wiping cloth 423 can be removed from the extension arm 422 and replaced to continue scraping off dirt from the surface of the filter membrane 41. Compared with the filter membrane 41 which has a filtering effect, the wiping cloth 423 can be made of materials such as fiber or non-woven fabric used for general wiping cloths, without additional processing, so the cost is relatively much lower.

[0026] Furthermore, as shown in Figures 10 and 11, the extension arm 422 is provided with at least one fixing hole 424. Two portions of the wiping cloth 423 are connected to the fixing hole 424 of the extension arm 422 by high-frequency welding. This prevents the wiping cloth 423 from falling off while wiping the filter membrane 41, and the high-frequency welding method also facilitates the replacement of the wiping cloth 423. In a preferred embodiment of the present invention, the extension arm 422 is provided with two fixing holes 424, which are located at one end of the extension arm 422 near the base 421 and the other end away from the base 421, respectively.

[0027] As shown in Figures 9 and 10, in a preferred embodiment of the present invention, each cleaning component 42 includes four extension arms 422. The four extension arms 422 extend from the base 421 in different directions and are distributed at equal angles. By increasing the number of extension arms 422, the cleaning effect of scraping the surface of the filter membrane 41 can be further improved. In other embodiments, the cleaning component 42 may also include two or more extension arms 422. The actual number of extension arms 422 may be determined based on factors such as the cleaning effect, the area of ​​the filter membrane 41 being covered, the load on the rotation of the spindle 20 and the plurality of cleaning components 42, and is not limited to the preferred embodiment of the present invention.

[0028] Furthermore, as shown in Figures 5, 7 and 9, in one axial direction of the spindle 20, the plurality of extension arms 422 of each cleaning component 42 are staggered with the plurality of extension arms 422 of adjacent cleaning components 42. This avoids two adjacent cleaning components 42 from simultaneously clamping the same position of the filter membrane 41 located between them, and avoids the filter membrane 41 from being subjected to strong friction when the cleaning component 42 rotates, thereby reducing the risk of damage to the filter membrane 41.

[0029] Preferably, as shown in Figures 9 and 13, the filtration device further includes a plurality of spacer rings 43, which are respectively fitted onto the two purified water output pipes 30, and the plurality of spacer rings 43 and the plurality of filter membranes 41 are stacked alternately, as shown in Figures 12 and 13. Each spacer ring 43 is provided with two sealing rings 431, which are respectively located on both sides of the spacer ring 43. Specifically, the spacer ring 43 is provided with an annular groove to accommodate the two sealing rings 431, and the periphery of the water inlet opening 411 of the filter membrane 41 is pressed against by the sealing rings 431 of the two adjacent spacer rings 43.

[0030] By alternating the spacer ring 43 and its sealing ring 431 with the filter membrane 41, a sealed space can be formed around the wall of the purified water output pipe 30, preventing wastewater from flowing into the interior of the tank 10 and then to the periphery of the purified water output pipe 30. The wastewater must be filtered by the filter membrane 41 before it can enter the aforementioned sealed space from the interior of the filter membrane 41 through the water inlet 411, and then enter the purified water output pipe 30 from the water inlet 31, ensuring that the water collected in the purified water output pipe 30 is all filtered purified water.

[0031] Specifically, each of the spacer rings 43 further includes an inner peripheral wall 432 and a plurality of protrusions 433. The plurality of protrusions 433 protrude from the inner peripheral wall 432 and abut against the wall of the purified water output pipe 30, so that the inner peripheral wall 432 is spaced apart from the purified water output pipe 30 to form the aforementioned sealed space. Purified water can enter the sealed space from the water inlet openings 411 of the plurality of filter membranes 41, and then enter the purified water output pipe 30 from the water inlet hole 31.

[0032] More preferably, as shown in FIG9, each filter membrane 41 is provided with two lugs 413. The outer diameter of the filter membrane 41 at the lugs 413 is larger than the outer diameter of the filter membrane 41 at other parts. The water inlet 411 is located on the lugs 413. By further designing the lugs 413, the purified water output pipe 30 can be moved outward away from the spindle 20. Under the premise of avoiding interference between the extension arm 422 and the purified water output pipe 30, the diameter of the purified water output pipe 30 can be selected more freely.

[0033] In a preferred embodiment of the present invention, the filtration device includes the two purified water output pipes 30. In other embodiments, the filtration device may also include a single purified water output pipe 30. The number of structures or components corresponding to the purified water output pipe 30, such as the water inlet 411 and the spacer ring 43, will be changed accordingly. The filtered purified water can still be output through the purified water output pipe 30. The number of purified water output pipes 30 may be determined according to different considerations such as purified water output flow rate and cost of related components, and is not limited to the preferred embodiment of the present invention.

[0034] Furthermore, as shown in Figures 4, 7 and 8, in a preferred embodiment of the present invention, the bottom end of the spindle 20 is installed through a spindle end cap 50, which is fixed to the positioning plate 400 by bolts. In order to meet the requirements of water immersion, the spindle end cap 50 is also provided with a bushing 51 and a washer 52 made of wear-resistant ceramic material, replacing the ordinary bearing, to ensure that the spindle 20 rotates normally.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any person skilled in the art who makes partial modifications or alterations to the technical content disclosed in the present invention without departing from the scope of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention. [Simplified Explanation of the Diagram]

[0007] Figure 1 is a bottom perspective view of a preferred embodiment of the present invention. Figure 2 is a top perspective view of a preferred embodiment of the present invention. Figure 3 is an exploded view of some components of a preferred embodiment of the present invention. Figure 4 is a side sectional view of a preferred embodiment of the present invention. Figure 5 is a partial enlarged view of Figure 4. Figure 6 is an exploded view of the top of the mandrel and the filter assembly of a preferred embodiment of the present invention. Figure 7 is another partial enlarged view of Figure 4. Figure 8 is an exploded view of the bottom of the mandrel and the filter assembly of a preferred embodiment of the present invention. Figure 9 is an exploded view of the filter assembly of a preferred embodiment of the present invention. Figure 10 is a perspective view of the cleaning assembly of a preferred embodiment of the present invention, omitting the wiping cloth. Figure 11 is a partial side sectional view of the cleaning assembly of a preferred embodiment of the present invention. Figure 12 is an exploded view of the spacer ring of a preferred embodiment of the present invention. Figure 13 is a side sectional view of the water purification output pipe, filter membrane, and spacer ring of a preferred embodiment of the present invention.

Claims

1. A filter device for cleaning filter membranes, comprising: a barrel having an inlet and an outlet communicating with the interior of the barrel; and a spindle rotatably disposed within the barrel and having a defined axial direction. The system includes at least one purified water output pipe disposed within and extending beyond the barrel body, the purified water output pipe having a plurality of water inlet holes penetrating its wall; and a plurality of filter membranes fixed inside the barrel body and arranged spaced apart along the axial direction of the spindle, each filter membrane having at least one water inlet opening surrounding the wall of the purified water output pipe, allowing liquid to be filtered through the filter membrane and enter the filter membrane, and then enter the purified water output pipe through the water inlet opening and the water inlet holes; and a plurality of cleaning components connected to the spindle and having at least one extension arm, each cleaning component's extension arm located between two adjacent filter membranes, the cleaning component being able to rotate under the spindle's influence, thereby scraping the surface of the filter membranes with the extension arm; wherein... A support is fixed on the spindle, and each cleaning component includes a base. The base is sleeved on the spindle, and the extension arm extends from the base. The bases of the plurality of cleaning components are stacked and connected, and the base of one of the cleaning components is engaged with the support, so that the plurality of cleaning components rotate synchronously with the spindle.

2. The filter device for cleaning filter membranes as claimed in claim 1, wherein each of the cleaning components includes a plurality of inserts and a plurality of recesses, the plurality of inserts and the plurality of recesses being respectively disposed on both sides of the base, the plurality of inserts being respectively inserted into the plurality of recesses of another adjacent cleaning component, such that the bases of the plurality of cleaning components are stacked together.

3. A filtration device for cleanable filter membranes as claimed in claim 1, wherein each of the filter membranes has a central opening, the mandrel passes through the central opening, and the bases of the plurality of cleaning components are located within the area of ​​the central opening.

4. A filter device for cleaning filter membranes as described in claim 1, wherein the extension arm is provided with a wiping cloth that is attached to the surface of the filter membrane.

5. The filter device for cleaning the filter membrane as claimed in claim 4, wherein the extension arm is provided with at least one fixing hole, and two portions of the wiping cloth are connected to the fixing hole of the extension arm by high frequency welding.

6. A filtration device for a cleanable filter membrane as described in any one of claims 1 to 5, wherein each of the cleaning components comprises a plurality of the extension arms extending in different directions and distributed at equal angles.

7. A filtration device for a cleanable filter membrane as claimed in claim 6, wherein a plurality of extension arms of each of the cleaning components are staggered with a plurality of extension arms of adjacent cleaning components in the axial direction of the mandrel.

8. A filtration device for a cleanable filter membrane as described in any one of claims 1 to 5, comprising a plurality of spacer rings fitted onto the purified water output pipe and stacked alternately with the plurality of filter membranes, each spacer ring having two sealing rings located on opposite sides of the spacer ring, and the periphery of the water inlet being pressed against by the sealing rings of two adjacent spacer rings.

9. A filtration device for a cleanable filter membrane as described in any one of claims 1 to 5, wherein each of the filter membranes is provided with at least one lug, the outer diameter of the filter membrane at the lug is greater than the outer diameter of the filter membrane at other parts, and the water inlet is located on the lug.

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