Fiber filter with backwashing function

Abstract

The invention discloses a fiber filter with a backwashing function, which comprises an external tank body, two ends of the external tank body are respectively connected with an end connecting part, the end connecting part comprises a type A connecting part and a type B connecting part, and the type A connecting part is provided with an outlet; the B-shaped connecting part comprises an inlet, a drain outlet and an inner pipe part, and the inlet is communicated with the inner pipe part; the outer tank body is matched with the type A connecting part and the type B connecting part to form an outer cavity; an inner cavity is formed in the outer cavity, the outer cavity and the inner cavity are separated by arranging a fiber filtering membrane module, the fiber filtering membrane module is provided with a closed end and an open end, and the fiber filtering membrane module is fixed to the end connecting part; wherein the inner pipe part is connected with a liquid inlet pipe, the liquid inlet pipe extends into the inner cavity from the open end, and the free end of the liquid inlet pipe is close to the closed end, so that the liquid inlet pipe is matched with the outlet in the outer cavity to form filtered water circulation; and the opening end is communicated with the drain outlet, so that reverse cleaning circulation from the outlet to the drain outlet is realized. The problems of incomplete backwashing, complex structure and difficult maintenance in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of water purification equipment, and particularly relates to a fiber filter with a backwashing function, which is suitable for water purification scenes such as domestic water, swimming pool water and bathroom water. BACKGROUND

[0002] In the field, the fiber filter is easily clogged by fine particles during long-term use, and the water flow needs to be ensured to uniformly penetrate the fiber layer during backwashing. Moreover, the mechanical strength of the fiber filter material is limited, and a reasonable support structure needs to be set to prevent fiber loss or damage.

[0003] The prior art discloses a backwashing ultrafiltration filter device with a publication number CN222605969U, which adopts an ultrafiltration membrane filter cartridge and multiple electromagnetic valves to control the water flow path, thereby realizing the functions of filtration and backwashing. In the view of the skilled person, although the prior art uses reverse water flow for cleaning, the water flow path is complex and relies on multiple electromagnetic valves for switching, which can easily lead to incomplete cleaning, especially for fiber filter media, impurities can easily embed into the fiber gap, and the reverse water flow is difficult to effectively strip. The existing device contains a large number of pipes and electromagnetic valves, and the installation and disassembly are cumbersome, the maintenance cost is high, and the old ultrafiltration membrane filter cartridge cannot be simply disassembled and replaced. An ultrasonic generator is also used for auxiliary cleaning in some time periods, which increases the energy consumption and the complexity of the device, and can cause damage to the fiber membrane and shorten the service life. The support mechanism of the prior art is simply designed and cannot effectively disperse the water flow pressure, and the fiber filter membrane can easily collapse or deform during backwashing, affecting the filtration and backwashing effect. SUMMARY

[0004] In order to solve the problems of incomplete backwashing, complex structure and difficult maintenance in the prior art, the present application provides a fiber filter with a simple structure, high backwashing efficiency and easy maintenance.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A fiber filter with a backwashing function, comprising an external tank body, the two ends of the external tank body are respectively connected with end connection parts, the end connection parts include an alpha connection part and a beta connection part, wherein the alpha connection part has an outlet; the beta connection part includes an inlet, a blowdown port and an inner pipe part, the inlet is in communication with the inner pipe part;

[0007] The external tank body cooperates with the alpha connection part and the beta connection part to form an outer cavity; an inner cavity is arranged in the outer cavity, and the outer cavity and the inner cavity are separated by arranging a fiber filter module group, the fiber filter module group has a closed end and an open end, and the fiber filter module group is fixed with the end connection part;

[0008] The inner tube part is connected with a liquid inlet pipe, the liquid inlet pipe extends into the inner cavity from the open end, and the free end is close to the closed end, so that the liquid inlet pipe cooperates with the outlet on the outer cavity to form a filtered water circulation.

[0009] The open end is communicated with the sewage outlet to realize the backwashing circulation between the outlet and the sewage outlet.

[0010] In an implementable manner, the fiber filter membrane group comprises a fiber filter membrane, the fiber filter membrane forms a closed bottom at the closed end, and the fiber filter membrane extends to the type B connecting part at the open end.

[0011] The first supporting mechanism arranged on the liquid inlet pipe, the second supporting mechanism arranged on the outer tank body, and the third supporting mechanism arranged at the closed end are further included.

[0012] In an implementable manner, the open end of the fiber filter membrane group is provided with an end cover, the end cover is arranged between the open end and the type B connecting part, and is supported and fixed by the support column arranged in the type B connecting part.

[0013] In an implementable manner, the first supporting mechanism comprises a plurality of supporting units, the supporting unit comprises a supporting base ring sleeved on the liquid inlet pipe, and at least three supporting sheets are uniformly distributed on the radial section of the supporting base ring and in contact with the fiber filter membrane.

[0014] In an implementable manner, the upper surface of the supporting sheet is an inclined surface, so that the liquid rotates clockwise when flowing from the closed end to the open end. The upper surface is the surface that can first contact the liquid.

[0015] In an implementable manner, the second supporting mechanism comprises a plurality of strip-shaped reinforcing ribs fixed on the inner surface of the end head connecting part and uniformly distributed, and a plurality of ring-shaped reinforcing ribs embedded on the strip-shaped reinforcing ribs.

[0016] In an implementable manner, the third supporting mechanism comprises a supporting plate arranged on the inner side of the closed bottom, the supporting plate is provided with a fastening pipe, the fastening pipe is clamped with the liquid inlet pipe, and the end of the fastening pipe close to the supporting plate or a plurality of liquid outlet holes are arranged on the supporting plate to enable the liquid to enter the inner cavity.

[0017] A cover plate arranged on the outer side of the closed bottom is further included, and the cover plate is clamped and connected with the ring-shaped reinforcing rib.

[0018] In an implementable manner, the type A connecting part comprises a sealing pipe body sleeved on the outer tank body, the sealing pipe body is clamped with a sealing cover, and the sealing pipe body and the sealing cover are provided with a detachable sealing clamp.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] The opening end of the fiber filter membrane group is communicated with the blowdown port, the backwashing water flow flows reversely into the blowdown port from the outlet, a circulation opposite to the filtering direction is formed, impurities in the fiber gap are effectively flushed, and blockage is avoided. The arrangement of the plurality of supporting mechanisms ensures that the fiber filter membrane is not deformed under high-pressure backwashing, and the service life is prolonged. The end connecting part adopts a detachable mechanism, the fiber filter membrane group is quickly installed and detached, and the maintenance time and cost are reduced. The inclined surface of the supporting sheet is designed to make the liquid rotate clockwise, enhance the turbulent flow effect, and improve the cleaning uniformity; the strip-shaped and ring-shaped reinforcing ribs further stabilize the fiber filter membrane, and prevent local wear. The whole outer cavity adopts a multiple sealing structure to prevent leakage and ensure the stability of the filtering and backwashing process. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall appearance of the present application;

[0022] Figure 2 is a schematic diagram of the internal part after local cutting of the present application;

[0023] Figure 3 is a front view of the novel outlet and inlet of the present application;

[0024] Figure 4 is Figure 3 is a sectional view at A-A in the present application;

[0025] Figure 5 is a schematic diagram of the partial structure of the fiber filter membrane group in the outer cavity of the present application;

[0026] Figure 6 is a front view of the outlet and inlet of another embodiment of the present application;

[0027] Figure 7 is another embodiment Figure 6 is a sectional view at B-B in the present application;

[0028] Figure 8 is a schematic diagram of the structure of the supporting plate in another embodiment of the present application;

[0029] In the figure: 1 outer tank body, 2 end head connecting part, 21 type A connecting part, 210 outlet, 211 sealing pipe body, 212 sealing cover, 213 sealing clamp,

[0030] 22 type B connecting part, 220 inlet, 221 blowdown port, 222 inner pipe part, 23 liquid inlet pipe,

[0031] 3 outer cavity, 31 first supporting mechanism, 310 supporting base ring, 311 supporting sheet, 32 second supporting mechanism, 320 strip-shaped reinforcing rib, 321 ring-shaped reinforcing rib,

[0032] 33 third supporting mechanism, 330 supporting plate, 331 fastening pipe, 332 covering plate,

[0033] 4 Inner cavity, 5 Fiber filter membrane assembly, 51 Closed end, 52 Open end, 53 Fiber filter membrane, 54 End cap, 55 Support column. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] like Figures 1 to 8 The diagram shows a schematic of the fiber filter of the present invention. It can be seen that a fiber filter with backwashing function includes an outer tank 1, and end connection parts 2 are respectively connected to both ends of the outer tank 1. Each end connection part 2 has an outer shell and an inner retaining ring. The outer shell and the inner retaining ring are embedded in the outer tank 1 through the groove formed between them. Therefore, in this embodiment, the outer tank 1, the type A connection part 21 and the type B connection part 22 cooperate to form an outer cavity 3.

[0036] In this embodiment, the end connection portion 2 includes a type A connection portion 21 and a type B connection portion 22. The type A connection portion 21 has an outlet 210. The type B connection portion 22 includes an inlet 220, a drain outlet 221, and an inner tube portion 222, with the inlet 220 communicating with the inner tube portion 222. An inner cavity 4 is provided inside the outer cavity 3. The outer cavity 3 and the inner cavity 4 are separated by a fiber filter membrane assembly 5. The fiber filter module 5 has a closed end 51 and an open end 52. The fiber filter module 5 is fixed to the end connection portion 2, and there is a gap between the fiber filter module 5 and the outer tank 1.

[0037] In this embodiment, an inlet pipe 23 is connected to the inner tube 222. The inlet pipe 23 extends into the inner cavity 4 from the open end 52, with its free end close to the closed end 51, so that the inlet pipe 23 and the outlet 210 on the outer cavity 3 can cooperate to form a filtered water circulation. The open end 52 is connected to the drain port 221 to realize the backwashing circulation between the outlet 210 and the drain port 221.

[0038] In this embodiment, the type A connecting part 21 also includes a sealing tube 211 sleeved on the outer tank 1, a sealing cap 212 engaged on the sealing tube 211, and a detachable sealing clamp 213 provided at the sealing tube 212 and the sealing cap 212.

[0039] In this embodiment, the fiber filter membrane assembly 5 includes a fiber filter membrane 53, which forms a closed bottom at the closed end 51 and extends to the type B connector 22 at the open end 52; it also includes a first support mechanism 31 disposed on the liquid inlet pipe 23, a second support mechanism 32 disposed on the outer tank 1, and a third support mechanism 33 located at the closed end 51.

[0040] The fiber filter membrane 53 extends from the open end 52 to the type B connector 22. The structure can also be configured such that an end cap 54 is provided at the open end 52 of the fiber filter membrane assembly 5. The end cap 54 is located between the open end 52 and the type B connector 22 and is supported and fixed by a support column 55 provided in the type B connector 22.

[0041] In this embodiment, the first support mechanism 31 includes several support units. Each support unit includes a support base ring 310 sleeved on the liquid inlet pipe 23. At least three support plates 311 are evenly distributed on the radial cross-section of the support base ring 310, which contact the fiber filter membrane 33. The upper surface of the support plate 311 is inclined, causing the liquid to rotate clockwise as it flows from the closed end 51 to the open end 52. In this embodiment, the upper surface of the support plate 311 is the surface that first contacts the liquid. The number of support units is arranged according to the length of the liquid inlet pipe 23 during installation. The installer only needs to control the distance between every two support units. Preferably, there are four support plates 311, which are evenly arranged on the support base ring 310. The projections of the support plates 311 on any cross-section of the liquid inlet pipe 23 coincide. Although the support plates 311 on the front and rear support units can be staggered, in order to prevent the liquid in the inner cavity 4 from washing away the dirt during backwashing, channels that increase the liquid flow rate are deliberately formed between the support plates 311.

[0042] In this embodiment, the second support mechanism 32 includes a plurality of strip-shaped reinforcing ribs 320 fixed on the inner surface of the end connection portion 2 and evenly distributed, and a plurality of ring-shaped reinforcing ribs 321 embedded on the strip-shaped reinforcing ribs 320.

[0043] In this embodiment, the third support mechanism 33 includes a support plate 330 disposed on the inner side of the closed bottom, a fastening tube 331 disposed on the support plate 330, and the fastening tube 331 engaging with the liquid inlet tube 23. The end of the fastening tube 331 near the support plate 330 or the support plate 330 has several liquid outlet holes to allow liquid to enter the inner cavity 4. It also includes a cover plate 332 disposed on the outer side of the closed bottom, and the cover plate 332 engaging with the ring-shaped reinforcing rib 321. In this embodiment, preferably, the support plate 330 has a liquid outlet hole. Fluid enters the inner cavity 4 through this liquid outlet hole.

[0044] In another embodiment, the preferred support plate 330 has four liquid outlet holes, which are connected to four fan-shaped channels on the upper surface of the support plate 330. In this embodiment, the upper surface is the surface in contact with the fiber filter membrane 53. In this embodiment, the entire outer cavity 3 is vertically placed on a horizontal plane. Fluid enters the inner cavity 4 from the bottom through the inlet pipe 23 and then transfers to the top. After flowing out of the liquid outlet holes, the fluid velocity increases in the fan-shaped channels, and then a downward vortex is formed in the inner cavity 4. The vortex pushes the particles adhering to the fiber filter membrane 53 downward. Under the action of the support plate 311, the fluid forms layers in the inner cavity 4 and flows out of the fiber filter membrane 53 into the outer cavity 3.

[0045] The disassembly and assembly process of this embodiment is as follows: First, the fiber filter membrane assembly 5 is assembled. A section of inlet pipe 23 of the required length is selected. Several support units and support plates 330 are fitted on the inlet pipe 23. Then, the fiber filter membrane 53 is covered on the support units and support plates 330. A support net composed of strip-shaped reinforcing ribs 320 and ring-shaped reinforcing ribs 321 is fitted on the fiber filter membrane 53. Finally, a cover plate 332 is installed at the closed end 51.

[0046] The liquid inlet pipe 23 of the assembled fiber filter membrane group 5 is inserted into the inner tube 222 of the type B connector 22. Then, the outer tank 1 is inserted into the slot of the type B connector 22. Next, the slot of the type A connector 21 is fitted onto the outer tank 1. Finally, the sealing cap 212 is placed on the type A connector 21 and sealed by the sealing clamp 213.

[0047] When disassembling the micro-arc, simply loosen the sealing clamp, open the sealing cover 212, remove the inlet pipe 23 with the fiber filter membrane module 5, and clean or replace the fiber filter membrane module 5.

[0048] The filtration principle of this embodiment is as follows: the liquid to be filtered enters from the inlet 220 of the type B connector 22 and flows into the inlet pipe 23 through the inner tube 222. The liquid enters the inner cavity 4 through the outlet hole at the free end of the inlet pipe 23, and penetrates the fiber filter membrane 53 under pressure. Impurities are trapped in the inner cavity 4, and the purified liquid enters the outer cavity 3 and flows out from the outlet 210 of the type A connector 21, forming a filtered water circulation.

[0049] The backwashing principle of this embodiment is as follows: During backwashing, the inlet 220 is closed, and backwash water is injected from the outlet 210. The backwash water enters the outer cavity 3, penetrates the fiber filter membrane 53 in the reverse direction, and washes away the trapped impurities. The impurities are discharged from the opening end 52 of the fiber filter membrane assembly 5 with the water flow and flow out through the drain port 221 of the type B connector 22, forming a backwashing cycle. The support mechanism prevents the fiber filter membrane assembly 5 from deforming during the backwashing process: the support plate 341 of the first support mechanism 34 guides the water flow to rotate clockwise, enhancing the flushing force; the strip-shaped reinforcing ribs 350 and the ring-shaped reinforcing ribs 351 of the second support mechanism 35 disperse the water flow pressure; the support plate 360 ​​and the cover plate 362 of the third support mechanism 36 stabilize the closed end 51.

[0050] In another embodiment, the entire outer cavity 3 is vertically placed on a horizontal plane. The backwash fluid enters the outer cavity 3 through the outlet 210. Since the backwash fluid first descends directly in the outer cavity 3 and then penetrates the fiber filter membrane 53 into the inner cavity 4, the particles on the fiber filter membrane 53 are washed into the bottom of the type B connector 22 and merged with the particles that are pushed to the bottom of the type B connector 22 by the vortex during filtration. Then the backwash fluid can discharge the particles accumulated at the bottom from the drain port 221.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fiber filter with backwashing function, comprising an outer tank (1), wherein end connectors (2) are respectively connected to both ends of the outer tank (1), characterized in that, The end connection part (2) includes a type A connection part (21) and a type B connection part (22), wherein the type A connection part (21) has an outlet (210); the type B connection part (22) includes an inlet (220), a drain outlet (221) and an inner tube part (222), wherein the inlet (220) is connected to the inner tube part (222); The outer tank (1) cooperates with the type A connecting part (21) and the type B connecting part (22) to form an outer cavity (3); an inner cavity (4) is provided inside the outer cavity (3), and the outer cavity (3) and the inner cavity (4) are separated by a fiber filter membrane assembly (5). The fiber filter assembly (5) has a closed end (51) and an open end (52), and the fiber filter assembly (5) is fixed to the end connecting part (2) respectively. The inner tube (222) is connected to an inlet pipe (23), which extends into the inner cavity (4) from the open end (52), with its free end close to the closed end (51), so that the inlet pipe (23) and the outlet (210) on the outer cavity (3) can cooperate to form a filtered water circulation. The opening end (52) is connected to the drain outlet (221) to realize the backwashing cycle from the outlet (210) to the drain outlet (221).

2. The fiber filter with backwashing function according to claim 1, characterized in that, The fiber filter membrane assembly (5) includes a fiber filter membrane (53), which forms a closed bottom at the closed end (51) and extends to the type B connector (22) at the open end (52). It also includes a first support mechanism (31) disposed on the inlet pipe (23), a second support mechanism (32) disposed on the outer tank (1), and a third support mechanism (33) located at the closed end (51).

3. The fiber filter with backwashing function according to claim 2, characterized in that, The fiber filter membrane assembly (5) has an end cap (54) at its open end (52). The end cap (54) is located between the open end (52) and the type B connector (22) and is supported and fixed by a support column (55) located in the type B connector (22).

4. The fiber filter with backwashing function according to claim 2, characterized in that, The first support mechanism (31) includes several support units, each of which includes a support base ring (310) sleeved on the liquid inlet pipe (23). At least three support plates (311) are evenly distributed on the radial cross section of the support base ring (310) and are in contact with the fiber filter membrane (53).

5. The fiber filter with backwashing function according to claim 4, characterized in that, The upper surface of the support plate (311) is inclined, so that the liquid rotates clockwise when flowing from the closed end (51) to the open end (52).

6. The fiber filter with backwashing function according to claim 2, characterized in that, The second support mechanism (32) includes a plurality of strip-shaped reinforcing ribs (320) fixed on the inner surface of the end connection part (2) and evenly distributed, and a plurality of ring-shaped reinforcing ribs (321) embedded on the strip-shaped reinforcing ribs (320).

7. The fiber filter with backwashing function according to claim 6, characterized in that, The third support mechanism (33) includes a support plate (330) disposed on the inner side of the closed bottom. A fastening tube (331) is disposed on the support plate (330). The fastening tube (331) is engaged with the liquid inlet tube (23). The end of the fastening tube (331) near the support plate (330) or the support plate (330) is provided with a plurality of liquid outlet holes to allow liquid to enter the inner cavity (4). It also includes a cover plate (332) disposed on the outside of the closed bottom, the cover plate (332) being engaged with the ring-shaped reinforcing rib (321).

8. The fiber filter with backwashing function according to claim 1, characterized in that, The type A connecting part (21) includes a sealing tube (211) sleeved on the outer tank (1), a sealing cap (212) is engaged on the sealing tube (211), and a detachable sealing clamp (213) is provided at the sealing tube (211) and the sealing cap (212).

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