CN211706071U - Automatic back-flushing filter - Google Patents

Abstract

The utility model provides an automatic back-flushing filter, which solves the problems of inconvenient cleaning of the interior of the filter, insufficient internal sealing performance and the like, and comprises a filter cup body, an end cover with a water inlet and a water outlet can be detachably arranged at the upper end of the filter cup body, a sewage discharge component with a sewage discharge outlet is arranged at the lower end of the filter cup body, a water pressure movable filter screen component is movably arranged at the circumferential inner side of the filter cup body, an elastic jacking component is connected with the lower end of the filter cup body, a raw water cavity is arranged between the circumferential outer side of the water pressure movable filter screen component and the circumferential inner side of the filter cup body, a water purification cavity communicated with the water outlet is arranged at the circumferential inner side of the water pressure movable filter screen component, a cup body rotating scraping piece is sleeved at the circumferential outer side of the water pressure movable filter screen component, and the lower end of the cup body rotary scraping piece is provided with a communicating structure. The utility model has the advantages of good internal sealing performance, convenient cleaning, etc.

Description

Automatic back-flushing filter

Technical Field

The utility model belongs to the technical field of the filter, concretely relates to automatic back flush filter.

Background

The filter is an indispensable device on a medium conveying pipeline and is usually arranged at the inlet end of a pressure reducing valve, a pressure relief valve, a constant water level valve and other equipment of a squaring filter. The filter consists of a cylinder body, a stainless steel filter screen, a pollution discharge part, a transmission device and an electric control part. After the water to be treated passes through the filter cartridge of the filter screen, impurities are blocked. However, in practical applications, the filter is clogged by impurities after long-term use and is inconvenient to clean. In addition, the filter has the too big problem in inside clearance, thereby leads to the filter screen installation back leakproofness not enough to influence the filter effect.

In order to solve the defects of the prior art, people have long searched for and put forward various solutions. For example, the chinese patent document discloses a double scraping filter [201720921238.7], which comprises a hollow outer cylinder, an end cap connected to the upper end of the outer cylinder and having a water inlet and a water outlet, a cylindrical filter cylinder concentric with the outer cylinder and disposed in the outer cylinder through a circumferential positioning structure, a raw water chamber formed in a ring shape and communicating with the water inlet on the circumferential outer side of the filter cylinder and the circumferential inner side of the outer cylinder, a clean water chamber formed in the lower end of the filter cylinder and communicating with the water outlet on the circumferential inner side of the filter cylinder, a scraping frame body disposed in the raw water chamber on the circumferential outer side of the filter cylinder, the lower end of the scraping frame body fixedly connected in a circumferential direction to a sewage discharge assembly penetrating the lower end of the outer cylinder, the scraping frame body rotatably connected in a circumferential direction to the filter cylinder and the outer cylinder, and a first scraping structure contacting with the circumferential inner wall of, the circumferential inner side of the scraping and washing frame body is provided with a second scraping and washing structure which is contacted with the circumferential outer wall of the filtering cylinder body.

The problem of inconvenient clearance in the filter has been solved to a certain extent to above-mentioned scheme, but this scheme still has a lot of not enough, for example filter inside leakproofness scheduling problem.

Disclosure of Invention

The utility model aims at the above problem, provide a reasonable in design, effectual automatic back flush filter of internal seal.

In order to achieve the above purpose, the utility model adopts the following technical proposal: the automatic backwashing filter comprises a filter cup body, an end cover with a water inlet and a water outlet is detachably arranged at the upper end of the filter cup body, a sewage discharge assembly with a sewage discharge outlet is arranged at the lower end of the filter cup body, a cylindrical water pressure movable filter screen assembly is movably arranged at the circumferential inner side of the filter cup body, an elastic jacking assembly is connected at the lower end of the filter cup body, an annular raw water cavity is arranged between the circumferential outer side of the water pressure movable filter screen assembly and the circumferential inner side of the filter cup body, a purified water cavity communicated with the water outlet is arranged at the circumferential inner side of the water pressure movable filter screen assembly, a cylindrical cup body rotary scraping piece positioned in the raw water cavity is sleeved at the circumferential outer side of the water pressure movable filter screen assembly, a backwashing filter structure with a backwashing channel capable of communicating the water inlet and the purified water cavity is arranged at the upper end of the water, and the lower end of the cup body rotating scraping piece is provided with a communicating structure connected with the sewage discharging assembly. Through setting up seal structure to can cut off the back flush passageway between water inlet, the delivery port, sewage flow in water purification chamber when avoiding filtering has improved the leakproofness between water pressure activity filter screen subassembly and the rotatory scraper of cup.

In the automatic backwashing filter, the hydraulic movable filter screen assembly comprises a cylindrical lifting filter cylinder body, the upper end of the lifting filter cylinder body is open, the lower end of the lifting filter cylinder body is closed, and the filter screen body is arranged on the circumference of the lifting filter cylinder body.

In the automatic backwashing filter, the backwashing filter structure comprises a cylindrical backwashing filter cylinder body arranged at the upper end of the lifting filter cylinder body, the backwashing filter cylinder body is communicated with the lifting filter cylinder body, a plurality of water inlets are formed in the circumferential direction of the lifting filter cylinder body, a small filter screen body is arranged in the circumferential direction of the lifting filter cylinder body, and the water inlets, the water inlets and the water purification cavity are sequentially communicated to form a backwashing channel. The small filter screen body and the water inlet can lead water into the water purifying cavity from the water inlet, so that impurities on the outer side of the lifting filter cylinder body are flushed out from the sewage discharge assembly at the lower end.

In the automatic backwashing filter, the cup body rotating scraping piece comprises a rotating scraping barrel body coaxially sleeved on the circumferential outer side of the backwashing filter barrel body, the upper end of the rotating scraping barrel body is provided with a scraping barrel mounting seat connected with the filter cup body through a circumferential positioning structure, and the circumferential outer side of the scraping barrel mounting seat is provided with a plurality of through holes respectively communicated with the water inlet. Water can flow into the water purifying cavity or the raw water cavity from the through hole.

In foretell automatic back flush filter, seal structure includes that coaxial setting scrapes a barrel mount pad upper end and is the sealed barrel of tube-shape, and the through-hole circumference evenly sets up in sealed barrel lower extreme in proper order, and the back flush is strained the barrel and is worn to locate in the sealed barrel, and is equipped with seal assembly between back flush and strain the barrel and the sealed barrel, strains the barrel upper end at the lift and has annular seal, and annular seal one side forms the annular seal face corresponding with the through-hole, and sealed barrel lower extreme supports under the effect of elasticity roof pressure subassembly and leans on the setting on annular seal face.

In the automatic backwashing filter, the sealing assembly comprises a sealing ring installation groove arranged at the outer side of the periphery of the backwashing filter cylinder body, and a sealing ring body contacted with the inner wall of the periphery of the sealing cylinder body is arranged in the sealing ring installation groove.

In the automatic backwashing filter, the circumferential positioning structure comprises a plurality of positioning raised lines arranged on the circumferential outer side of the scraping cylinder mounting seat, positioning grooves corresponding to the positioning raised lines are arranged on the circumferential inner side of the upper end of the filter cup body, and the positioning raised lines are inserted into the positioning grooves; scrape a barrel mount pad lower extreme and peg graft in rotatory barrel upper end of scraping, and scrape a barrel mount pad and rotatory barrel circumferential direction of scraping and link to each other. The circumferential positioning structure ensures that the scraping cylinder mounting seat and the filtering cup body are relatively fixed.

In the automatic backwashing filter, the communicating structure comprises a scraping cylinder base formed at the lower end of the rotary scraping cylinder body, a plurality of openings are formed in the circumferential direction of the scraping cylinder base, and the openings are respectively communicated with the sewage discharge port.

In the automatic backwashing filter, the sewage discharging component comprises a sewage discharging part which is arranged at the lower end of the filter cup body in a circumferential rotating manner and is provided with a sewage discharging port, and the upper end of the sewage discharging part is arranged at the lower end of the scraper base in a penetrating manner and is connected with the scraper base in a circumferential positioning manner.

In the automatic backwashing filter, the elastic jacking component comprises a jacking spring arranged between the scraping cylinder base and the lifting filter cylinder body, one end of the jacking spring acts in the scraping cylinder base, and the other end of the jacking spring acts on the bottom of the lifting filter cylinder body. The jacking spring presses the lifting filter cylinder body upwards to ensure that the upper end and the lower end of the lifting filter cylinder base are isolated.

Compared with the prior art, the utility model has the advantages of: through the back washing structure, impurities accumulated in the filter can be automatically removed; the rotary scraping cylinder is added, so that dirt on the outer side of the filter screen can be timely scraped; the sealing structure is added at the upper end of the water pressure movable filter screen assembly, so that the sealing isolation performance inside the filter can be improved.

Drawings

FIG. 1 is a sectional view of the structure of the present invention during filtration;

FIG. 2 is a sectional view of the structure of the automatic back washing device of the present invention;

fig. 3 is a schematic expanded view of the structure of the present invention;

in the figure, a filtering cup body 1, a raw water cavity 11, a water purification cavity 12, an end cover 2, a water inlet 21, a water outlet 22, a sewage discharge component 3, a sewage discharge port 31, a sewage discharge part 32, a hydraulic pressure movable filter screen component 4, a back flush filter structure 41, a back flush channel 42, a lifting filter cylinder body 43, a filter screen body 44, a back flush filter cylinder body 45, a water inlet 46, a small filter screen body 47, an elastic jacking component 5, a jacking spring 51, a cup body rotary scraping part 6, a rotary scraping cylinder body 61, a scraping cylinder mounting seat 62, a through hole 63, a sealing structure 7, a sealing cylinder body 71, a sealing component 72, an annular sealing body 73, an annular sealing surface 74, a sealing ring mounting groove 75, a sealing ring body 76, a communicating structure 8, a scraping cylinder base 81, an opening 82, a circumferential positioning structure 9.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in figures 1-3, the automatic backwashing filter comprises a filtering cup body 1, an end cover 2 with a water inlet 21 and a water outlet 22 is detachably arranged at the upper end of the filtering cup body 1, a sewage discharge component 3 with a sewage discharge outlet 31 is arranged at the lower end, a cylindrical water pressure movable filter screen component 4 is movably arranged at the circumferential inner side of the filtering cup body 1, an elastic jacking component 5 is connected at the lower end of the filtering cup body 1, an annular raw water cavity 11 is arranged between the circumferential outer side of the water pressure movable filter screen component 4 and the circumferential inner side of the filtering cup body 1, a water purification cavity 12 communicated with the water outlet 22 is arranged at the circumferential inner side of the water pressure movable filter screen component 4, a cylindrical cup body rotating scraping component 6 positioned in the raw water cavity 11 is sleeved at the circumferential outer side of the water pressure movable filter screen component 4, a backwashing filter structure 41 with a backwashing channel 42 capable of communicating the water inlet 21, and a sealing structure 7 which can seal the back washing channel 42 is arranged between the upper end of the hydraulic pressure movable filter screen component 4 and the upper end of the cup body rotary scraping piece 6, and a communicating structure 8 which is connected with the sewage discharging component 3 is arranged at the lower end of the cup body rotary scraping piece 6. When the filter is backwashed, water enters from the water inlet 21, flows into the water purifying cavity 12 from the backwashing channel 42, then enters the raw water cavity 11 through the hydraulic movable filter screen assembly 4, and finally is discharged from the sewage discharge port 31, so that the aim of cleaning the outer side of the hydraulic movable filter screen assembly 4 is fulfilled.

Further, the hydraulic movable filter screen assembly 4 comprises a cylindrical lifting filter screen body 43, the upper end of the lifting filter screen body 43 is open, the lower end of the lifting filter screen body is closed, and the filter screen body 44 is arranged on the periphery of the lifting filter screen body 43. The water passes through the filter mesh body 44 to filter out impurities in the water.

Specifically, the backwashing filter structure 41 comprises a cylindrical backwashing filter cylinder body 45 arranged at the upper end of the lifting filter cylinder body 43, the backwashing filter cylinder body 45 is communicated with the inside of the lifting filter cylinder body 43, a plurality of water inlets 46 are formed in the circumferential direction of the lifting filter cylinder body 43, a small filter screen body 47 is arranged in the circumferential direction of the lifting filter cylinder body 43, and the water inlet 21, the water inlet 46 and the purified water cavity 12 are sequentially communicated to form a backwashing channel 42. After the sewage draining outlet 31 is opened, the back flushing channel 42 is communicated, and the water inlet 46 conveys water from the water inlet 21 to the water purifying cavity 12.

Preferably, the cup body rotating scraper 6 comprises a rotating scraper 61 coaxially sleeved on the circumferential outer side of the backflushing filter cylinder 45, the upper end of the rotating scraper 61 is provided with a scraper mounting seat 62 connected with the filter cup body 1 through a circumferential positioning structure 9, and the circumferential outer side of the scraper mounting seat 62 is provided with a plurality of through holes 63 respectively communicated with the water inlet 46.

Besides, seal structure 7 is scraping a sealed barrel 71 that barrel mount pad 62 upper end and be the tube-shape including coaxial setting, and through-hole 63 evenly sets up at sealed barrel 71 lower extreme in proper order circumference, backflushing filters in barrel 45 wears to locate sealed barrel 71, and backflushing filters and is equipped with seal assembly 72 between barrel 45 and the sealed barrel 71, it has annular seal 73 to filter barrel 43 upper end in going up and down, and annular seal 73 one side forms the annular seal face 74 corresponding with through-hole 63, and sealed barrel 71 lower extreme supports under the effect of elasticity roof pressure subassembly 5 and leans on the setting on annular seal face 74. When the sewage draining outlet 31 is closed, the elastic pressing component 5 presses upwards, so that the sealing component 72 between the sealing cylinder 71 and the backwashing filter cylinder 45 isolates the water inlet 21 from the water outlet 22.

Further, the seal assembly 72 includes a seal ring mounting groove 75 provided on the outer circumferential side of the backwash filter cartridge body 45, and a seal ring body 76 that contacts the inner circumferential wall of the seal cartridge body 71 is provided in the seal ring mounting groove 75.

Furthermore, the circumferential positioning structure 9 comprises a plurality of positioning convex strips 91 arranged on the circumferential outer side of the scraping cylinder mounting seat 62, and the circumferential inner side of the upper end of the filtering cup body 1 is provided with positioning grooves 92 corresponding to the positioning convex strips 91, and the positioning convex strips 91 are inserted into the positioning grooves 92; scrape a barrel mount pad 62 lower extreme and peg graft in rotatory barrel 61 upper end of scraping, and scrape a barrel mount pad 62 and rotatory barrel 61 circumferential direction of scraping and link to each other. The positioning convex strip 91 fixes the scraping cylinder mounting base 62 at the inner side of the upper end of the filtering cup body 1, wherein the rotary scraping cylinder body 61 can rotationally scrape dirt on the inner side of the filtering cup body 1.

As can be seen, the communicating structure 8 comprises a scraper base 81 formed at the lower end of the rotary scraper body 61, the scraper base 81 has a plurality of openings 82 in the circumferential direction, and the openings 82 are respectively communicated with the sewage discharge outlet 31. The drain 31 is opened, the lifting filter cylinder body 43 is lowered to the bottom end under the pressure of water flow, and the raw water cavity 11 is communicated with the drain through the opening 82.

Obviously, the dirt discharging component 3 comprises a dirt discharging part 32 which is arranged at the lower end of the filtering cup body 1 in a circumferential rotating mode and is provided with a dirt discharging opening 31, and the upper end of the dirt discharging part 32 penetrates through the lower end of the scraping cylinder base 81 and is connected with the scraping cylinder base 81 in a circumferential positioning mode through the dirt discharging part 32. The cavity at the upper end of the sewage discharging component 3 communicates the raw water cavity 11 with the sewage discharging port 31.

Further, the elastic pressing component 5 comprises a pressing spring 51 arranged between the scraping cylinder base 81 and the lifting filter cylinder body 43, and one end of the pressing spring 51 acts in the scraping cylinder base 81, and the other end acts on the bottom of the lifting filter cylinder body 43. The expansion and contraction of the top pressure spring 51 are controlled by the opening and closing of the sewage draining outlet 31. When the filter is closed, the bottom of the lifting filter cylinder body 43 is not under the pressure of water flow, and the spring is stretched. The drain 31 is opened and the bottom of the lifting filter cylinder 43 is pressed by water flow to compress the spring.

The principle of the embodiment is as follows: the sealing structure 7 is added between the hydraulic movable filter screen assembly 4 and the cup body rotating scraper 6, so that the water inlet 21 and the clean water cavity 12 are relatively isolated when the filter filters; when the filter is washed, the water inlet 21 is isolated from the raw water chamber 11, and the leakage is avoided. The top pressure spring 51 in the elastic top pressure assembly 5 is compressed when the sewage draining outlet 31 is opened, the back flushing channel 42 is communicated, and water flows from the water inlet 21, through the water inlet 46, into the purified water cavity 12 and then through the filter screen body 44 into the raw water cavity 11, so that dirt on the outer side of the filter screen body 44 is washed clean.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the filter cup body 1, the raw water chamber 11, the clean water chamber 12, the end cap 2, the water inlet 21, the water outlet 22, the sewage draining assembly 3, the sewage draining outlet 31, the sewage draining member 32, the hydraulic movable screen assembly 4, the backwashing filter structure 41, the backwashing channel 42, the lifting filter cylinder 43, the filter screen body 44, the backwashing filter cylinder 45, the water inlet 46, the small filter screen body 47, the elastic pressing assembly 5, the pressing spring 51, the cup body rotating scraping member 6, the rotating scraping cylinder body 61, the scraping cylinder mounting seat 62, the through hole 63, the sealing structure 7, the sealing cylinder 71, the sealing assembly 72, the annular sealing body 73, the annular sealing surface 74, the sealing ring mounting groove 75, the sealing ring body 76, the communicating structure 8, the scraping cylinder base 81, the opening 82, the circumferential positioning structure 9, the positioning convex strip 91, the positioning groove 92 and the like are used more frequently, the possibility of using. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (10)

1. An automatic backwashing filter comprises a filtering cup body (1), wherein an end cover (2) with a water inlet (21) and a water outlet (22) is detachably arranged at the upper end of the filtering cup body (1), a sewage discharge component (3) with a sewage discharge outlet (31) is arranged at the lower end of the filtering cup body, a cylindrical water pressure movable filter screen component (4) is movably arranged at the circumferential inner side of the filtering cup body (1), an elastic jacking component (5) is connected at the lower end of the filtering cup body (1), an annular raw water cavity (11) is arranged between the circumferential outer side of the water pressure movable filter screen component (4) and the circumferential inner side of the filtering cup body (1), a purified water cavity (12) communicated with the water outlet (22) is arranged at the circumferential inner side of the water pressure movable filter screen component (4), and a cylindrical cup body rotary scraping piece (6) positioned in the raw water cavity (11) is sleeved at the circumferential outer side of the water, the water purifier is characterized in that a backwashing filter structure (41) with a backwashing channel (42) which can communicate a water inlet (21) with a water purification cavity (12) is arranged at the upper end of the water pressure movable filter screen component (4), a sealing structure (7) which can seal the backwashing channel (42) is arranged between the upper end of the water pressure movable filter screen component (4) and the upper end of the cup body rotary scraping piece (6), and a communicating structure (8) which is connected with the sewage discharging component (3) is arranged at the lower end of the cup body rotary scraping piece (6).

2. The automatic backwashing filter of claim 1, wherein the hydraulically movable screen assembly (4) comprises a cylindrical elevating screen body (43), the elevating screen body (43) is open at an upper end and closed at a lower end, and the elevating screen body (43) is provided with a screen body (44) at a circumferential direction.

3. The automatic backwashing filter of claim 2, wherein the backwashing filter structure (41) comprises a cylindrical backwashing filter cylinder body (45) disposed at an upper end of the lifting filter cylinder body (43), the backwashing filter cylinder body (45) is communicated with the inside of the lifting filter cylinder body (43), a plurality of water inlets (46) are circumferentially disposed on the lifting filter cylinder body (43), a small filter screen body (47) is circumferentially disposed on the lifting filter cylinder body (43), and the water inlets (21), the water inlets (46) and the water purification chamber (12) are sequentially communicated to form the backwashing channel (42).

4. The automatic backwashing filter of claim 3, wherein the cup body rotating scraping member (6) comprises a rotating scraping cylinder body (61) coaxially sleeved on the circumferential outer side of the backwashing filter cylinder body (45), a scraping cylinder mounting seat (62) connected with the filter cup body (1) through a circumferential positioning structure (9) is arranged at the upper end of the rotating scraping cylinder body (61), and a plurality of through holes (63) respectively communicated with the water inlet (46) are arranged on the circumferential outer side of the scraping cylinder mounting seat (62).

5. The automatic backwashing filter of claim 4, wherein the sealing structure (7) comprises a cylindrical sealing cylinder (71) coaxially arranged at the upper end of the scraping cylinder mounting seat (62), the through holes (63) are sequentially and circumferentially and uniformly arranged at the lower end of the sealing cylinder (71), the backwashing filter cylinder (45) is arranged in the sealing cylinder (71) in a penetrating manner, a sealing assembly (72) is arranged between the backwashing filter cylinder (45) and the sealing cylinder (71), an annular sealing body (73) is arranged at the upper end of the lifting filter cylinder (43), an annular sealing surface (74) corresponding to the through hole (63) is formed at one side of the annular sealing body (73), and the lower end of the sealing cylinder (71) is abutted against the annular sealing surface (74) under the action of the elastic jacking assembly (5).

6. The automatic backwashing filter of claim 5, wherein the sealing assembly (72) comprises a sealing ring mounting groove (75) arranged on the circumferential outer side of the backwashing filter cylinder body (45), and a sealing ring body (76) contacting with the circumferential inner wall of the sealing cylinder body (71) is arranged in the sealing ring mounting groove (75).

7. The automatic backwashing filter of claim 4, 5 or 6, wherein the circumferential positioning structure (9) comprises a plurality of positioning ribs (91) arranged on the circumferential outer side of the scraper mounting seat (62), positioning grooves (92) corresponding to the positioning ribs (91) are arranged on the circumferential inner side of the upper end of the filter cup body (1), and the positioning ribs (91) are inserted into the positioning grooves (92); scrape a section of thick bamboo mount pad (62) lower extreme peg graft in rotatory barrel (61) upper end of scraping, just scrape a section of thick bamboo mount pad (62) and rotatory barrel (61) circumferential direction of scraping link to each other.

8. The automatic backwashing filter of claim 7, wherein the communicating structure (8) comprises a scraping cylinder base (81) formed at the lower end of the rotary scraping cylinder body (61), the scraping cylinder base (81) is circumferentially provided with a plurality of openings (82), and the openings (82) are respectively communicated with the sewage outlet (31).

9. The automatic backwashing filter of claim 8, wherein the sewage draining assembly (3) comprises a sewage draining member (32) which is arranged at the lower end of the filter cup body (1) in a circumferential rotating manner and is provided with a sewage draining outlet (31), the upper end of the sewage draining member (32) is arranged at the lower end of the scraping cylinder base (81) in a penetrating manner, and the sewage draining member (32) is connected with the scraping cylinder base (81) in a circumferential positioning manner.

10. The automatic backwashing filter of claim 8, wherein the elastic pressing assembly (5) comprises a pressing spring (51) disposed between the scraping cylinder base (81) and the lifting filter cylinder body (43), and one end of the pressing spring (51) acts on the scraping cylinder base (81) and the other end acts on the bottom of the lifting filter cylinder body (43).

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