CN220328071U - Plastic-coated transverse pre-filter - Google Patents

Abstract

The utility model discloses a plastic-coated transverse pre-filter which comprises two groups of PPR connectors, two groups of PPR nuts, a fastening piece, a large sealing piece, a water separator, a silica gel sheet, an inner framework, a filter screen, an outer framework, three groups of brush covers, a filter flask, a valve head, a supporting piece, an insert, a pollution discharge ball valve, a lining piece and an insert, wherein the fastening piece is connected to the outer side of the large sealing piece, and the large sealing piece is connected to the outer side of the lining piece. This package is moulded horizontal leading filter and is convenient through horizontal leading installation space, does not have the installation height restriction, is equipped with the silica gel piece in, can effectively accomplish the step down to protection complete machine and pipeline and rear end water equipment, outer skeleton and spare part contact point all ball form designs, reduce the frictional force that rotates and produce, be convenient for rotate, filtration and blowdown outer skeleton all can rotate, in-process of filtration, rivers are kept apart by inside working of plastics with the part of metal product, prevent heavy metal ion in the metal part and separate out in the aquatic, and the dismouting is simple, convenient to use.

Description

Plastic-coated transverse pre-filter

Technical Field

The utility model relates to the technical field of filters, in particular to a plastic-coated transverse pre-filter.

Background

The pre-filter is a first coarse filtering device for the whole house water, and can filter sediment, rust and large particulate matters in tap water. Prevent a large amount of sediment impurities generated in water supply networks of cities and communities from damaging human bodies, and play a positive pre-protection role on concealed pipelines, water taps, water warmers, water heaters, boilers, central air conditioners, washing machines, dish washers, coffee machines, other water home appliances (water purifiers, water softeners) and the like.

The prior pre-filter has certain defects when in use:

a pre-filter as in publication CN201821915269.2, the filter assembly having a first opening, a second opening and a water passage, wherein the first opening of the filter assembly is in communication with the water passage, the water passage being formed between the filter cartridge and the outer tube;

as another disclosure with application number CN201720382232.7, a pre-filter is provided with a siphon seam and a diversion channel, and the negative pressure formed by the siphon seam can suck the scraped impurity precipitate into the sewage draining channel, so as to play a double cleaning effect in cooperation with scraping and washing.

The existing pre-filter is a longitudinal T-shaped pre-filter, enough installation space is needed, the installation space requirement is high, the installation height is too low, the pollution discharge and water leakage phenomenon can be caused, the longitudinal T-shaped pre-filter is strict in installation environment requirement, the installation and pollution discharge are inconvenient under the condition that the reserved installation space is insufficient, the pollution discharge easily causes the water leakage phenomenon, and the applicability is reduced.

In view of this, a plastic-coated transversal prefilter is now devised.

Disclosure of Invention

The utility model aims to provide a plastic-coated transverse front-mounted filter, which solves the problem that the prior front-mounted filter proposed in the background art has defects.

In order to achieve the aim, the utility model provides the technical scheme that the plastic-coated transverse front-mounted filter comprises two groups of PPR connectors, two groups of PPR nuts, a fastener, a large sealing piece, a water separator, a silica gel sheet, an inner framework, a filter screen, an outer framework, three groups of brush covers, a filter flask, a valve head, a supporting piece, an insert, a pollution discharge ball valve, a lining piece and an insert;

the two groups of PPR connectors are respectively connected with two groups of PPR nuts, one group of PPR connectors are connected with the fastening pieces, and the other group of fastening pieces are connected with the embedded piece;

the fastener is connected to the outer side of the large sealing piece;

the large sealing piece is connected to the outer side of the lining piece;

the water separator is connected between the lining piece and the inner framework;

the silica gel sheet is arranged between the water separator and the inner framework;

the filter screen is arranged at the outer side of the inner framework;

the outer framework is connected to the outer side connected with the inner framework and the filter screen, the outer framework is arranged on the inner side of the filter flask, three groups of outer convex ribs are fixedly connected to the surface of the outer framework in a regular annular array, and three groups of inner convex ribs are fixedly connected to the inner wall of the outer framework in a regular annular array;

the three groups of brush covers are arranged on the outer framework in a regular annular array;

one end of the filter flask is connected with the fastening piece, and the other end of the filter flask is connected with the valve head;

the support piece is connected to the outer side of one end, far away from the silica gel sheet, of the inner framework, and is connected to the inner side of the inner insert;

the insert is sealed and connected with the lower end of the inner insert through a sealing ring, and the insert is arranged on the inner side of the lower end of the valve head;

the blowdown ball valve is arranged at the bottom of the valve head.

Preferably, the surface of the fastener is provided with a first external thread, the outer side of the fastener is fixedly connected with an outer hexagonal sleeve, the inner wall of the fastener is provided with a first internal thread, and the first external thread is connected with the inner wall of the PPR nut through a thread structure.

Preferably, the surface of the large sealing piece is provided with a second external thread, the inner side of the large sealing piece is provided with an inner polygonal hole, and the second external thread is connected with the first internal thread through a thread structure.

Preferably, one end of the water separator is fixedly connected with a first convex rib, the surface of the water separator is fixedly connected with a plurality of groups of first inclined water separation blades in a regular annular array, a third internal thread is arranged on the inner side of the water separator, one side, close to the first convex rib, of the water separator is of a closed structure, and one end, far away from the first convex rib, of the water separator is of an open structure.

Preferably, the outside of the inner framework is provided with a fourth external thread, the fourth external thread is connected with a third internal thread through a thread structure, the surface of the inner framework is fixedly connected with an annular end face, the annular end face is fixedly and integrally connected with two groups of second convex ribs, one end of the inner framework is a sealing mechanism, the other end of the inner framework is an opening structure, and the surface of one end of the sealing structure of the inner framework is provided with a semicircular indent.

Preferably, the outer convex rib is far away from one end of the outer framework, the inner convex rib is far away from one end of the outer framework, the outer convex rib is in spherical design, the spherical part of the outer convex rib is contacted with the inner wall of the filter flask, and the inner convex rib is contacted with the surface of one end of the support piece, which is short in outer diameter length.

Preferably, the brush cover is subjected to bristle planting treatment, and the bristles of the brush cover are internally scraped with the filtering surface of the filter screen and the inner surface of the external scraping filter flask.

Preferably, two groups of grooves are symmetrically formed in the inner wall of the supporting piece, the two groups of grooves are connected with the two groups of second convex ribs in a matched mode, four groups of third convex ribs are fixedly connected to the surface of one end of the supporting piece in a regular annular array mode, a plurality of groups of second inclined water diversion blades are fixedly connected to the surface of the other end of the supporting piece in a regular annular array mode, and one end, far away from the supporting piece, of each third convex rib is in a round corner design.

Preferably, the surface at the two ends of the lining piece and the end of the embedded piece close to the filter flask are provided with annular sealing grooves, sealing rubber rings are connected in the annular sealing grooves, and a silica gel piece is arranged at the joint between the embedded piece, the valve head and the PPR joint.

Preferably, the lining and the insert are both non-metal environment-friendly materials.

Compared with the prior art, the utility model has the beneficial effects that: this package is moulded horizontal leading filter and is convenient through horizontal leading installation space, does not have the installation height restriction, is equipped with the silica gel piece in, can effectively accomplish the step down to protection complete machine and pipeline and rear end water equipment, outer skeleton and spare part contact point all ball form designs, reduce the frictional force that rotates and produce, be convenient for rotate, filtration and blowdown outer skeleton all can rotate, in-process of filtration, rivers are kept apart by inside working of plastics with the part of metal product, prevent heavy metal ion in the metal part and separate out in the aquatic, and the dismouting is simple, convenient to use.

Drawings

FIG. 1 is a front cross-sectional view of a plastic coated transverse front filter according to the present utility model;

FIG. 2 is a schematic view of a fastener structure of a plastic-coated transverse prefilter of the present utility model;

FIG. 3 is a schematic view of a large seal for a plastic coated transverse prefilter of the present utility model;

FIG. 4 is a schematic view of a water separator with a plastic-coated transverse prefilter according to the present utility model;

FIG. 5 is a schematic view of an inner frame of a plastic coated transverse front filter according to the present utility model;

FIG. 6 is a schematic view of another construction of an inner frame of a plastic coated transverse front filter according to the present utility model;

FIG. 7 is a schematic diagram of an exoskeleton structure of a plastic coated transverse prefilter of the present utility model;

FIG. 8 is a schematic view of a support structure of a plastic coated transverse front filter according to the present utility model;

FIG. 9 is a partial front view of an overmolded transverse prefilter of the present utility model;

FIG. 10 is a cross-sectional elevation view of a plastic coated transverse prefilter of the present utility model in a filtering position;

fig. 11 is a front structural cross-sectional view of a plastic coated transverse prefilter of the present utility model in a blow-down condition.

In the figure:

1. a PPR linker;

2. a PPR nut;

3. a fastener; 301. a first external thread; 302. an outer hexagonal sleeve;

303. a first internal thread;

4. a large seal; 401. a second external thread; 402. an inner polygonal hole;

5. a water separator; 501. the first convex rib; 502. a first inclined water diversion blade;

503. a third internal thread;

6. a silicone sheet;

7. an inner skeleton; 701. a fourth external thread; 702. the second convex rib;

703. an annular end face; 704. semicircular concave;

8. a filter screen;

9. an outer skeleton; 901. a convex rib; 902. an inner convex rib;

10. a brush cover;

11. a filter flask;

12. a valve head;

13. a support; 1301. a groove; 1302. a third rib;

1303. a second inclined water diversion blade;

14. an insert;

15. a sewage discharging ball valve;

16. a liner;

17. an insert;

18. a silica gel piece.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-11, the present utility model provides a technical solution: a plastic-coated transverse front-mounted filter comprises two groups of PPR connectors 1, two groups of PPR nuts 2, a fastener 3, a large sealing piece 4, a water separator 5, a silica gel sheet 6, an inner framework 7, a filter screen 8, an outer framework 9, three groups of brush covers 10, a filter flask 11, a valve head 12, a supporting piece 13, an insert 14, a pollution discharge ball valve 15, a lining piece 16 and an insert 17.

Two sets of PPR joints 1 are respectively connected with two sets of PPR nuts 2, wherein one set of PPR joints 1 is connected with a fastener 3, and the other set of fastener 3 is connected with an embedded piece 17. Specifically, two sets of PPR connects 1 are connected with inlet tube and outlet pipe respectively, and PPR connects 1 can adopt welded mode to be connected with inlet tube, outlet pipe, and reference specification figure 1, PPR connects 1 one end and is equipped with annular arch, and PPR nut 2 one end is equipped with annular indent, and the annular arch of PPR connects 1 this end spacing connection in the annular indent of PPR nut 2, connects 1 spacing fixedly to two sets of PPR respectively through two sets of PPR nuts 2.

The fastener 3 is attached to the outside of the large seal 4.

Large seal 4 is attached to the outside of liner 16.

The water separator 5 is connected between the lining element 16 and the inner frame 7.

A silica gel sheet 6 is installed between the water separator 5 and the inner frame 7.

The filter screen 8 is installed outside the inner frame 7.

The outer skeleton 9 is connected in the outside of connecting in inner skeleton 7 and filter screen 8, and outer skeleton 9 sets up in the inboard of filter flask 11, and outer skeleton 9 surface is three sets of evagination muscle 901 of regular annular array fixedly connected with, and outer skeleton 9 inner wall is three sets of interior protruding muscle 902 of regular annular array fixedly connected with.

Three groups of brush covers 10 are arranged on the outer framework 9 in a regular annular array.

One end of the filter flask 11 is connected with the fastener 3, and the other end of the filter flask 11 is connected with the valve head 12.

The support 13 is connected to the outside of the end of the inner frame 7 remote from the silicone sheet 6, and the support 13 is connected to the inside of the insert 17.

The insert 14 is sealed and connected to the lower end of the insert 17 by a seal ring, and the insert 14 is disposed inside the lower end of the valve head 12. In particular, this separates the water from the valve head 12 so that heavy metals in the valve head 12 do not leach out of the water.

A blowdown ball valve 15 is mounted at the bottom of the valve head 12.

The surface of the fastener 3 is provided with a first external thread 301, the outer side of the fastener 3 is fixedly connected with an outer hexagonal sleeve 302, the inner wall of the fastener 3 is provided with a first internal thread 303, and the first external thread 301 is connected with the inner wall of the PPR nut 2 through a thread structure. Specifically, the first external thread 301 is fixedly connected to the PPR nut 2, thereby connecting the fastener 3 to the filter as a whole.

The surface of the large sealing element 4 is provided with a second external thread 401, the inner side of the large sealing element 4 is provided with an inner polygonal hole 402, and the second external thread 401 is connected with the first internal thread 303 through a thread structure. Specifically, the second external thread 401 and the first internal thread 303 are used for realizing the fixed connection between the large sealing element 4 and the fastener 3, and the tool can be used for fixing the large sealing element 4 during installation through the action of the inner polygonal hole 402, so that the convenience during installation is improved.

First protruding muscle 501 of water knockout drum 5 one end fixedly connected with, water knockout drum 5 surface are a plurality of first oblique water diversion blades 502 of regular annular array fixedly connected with of a plurality of groups, and water knockout drum 5 inboard is equipped with third internal screw thread 503, and water knockout drum 5 is close to first protruding muscle 501 one side and is enclosed construction, and water knockout drum 5 is kept away from first protruding muscle 501 one end and is open structure.

The outside of the inner framework 7 is provided with a fourth external thread 701, the fourth external thread 701 is connected with the third internal thread 503 through a thread structure, the surface of the inner framework 7 is fixedly connected with an annular end surface 703, the annular end surface 703 is fixedly and integrally connected with two groups of second convex ribs 702, one end of the inner framework 7 is a closing mechanism, the other end of the inner framework 7 is an opening structure, and a semicircular indent 704 is arranged on the surface of one end of the closing structure of the inner framework 7. Specifically, the fixed connection between the water separator 5 and the inner skeleton 7 is realized through the third internal thread 503 and the fourth external thread 701, referring to fig. 1 of the specification and fig. 5-6 of the specification, one end of the filter screen 8 is connected with the annular end surface 703, the other end of the filter screen 8 is connected with the water separator 5, the limit connection of the filter screen 8 is realized through the annular end surface 703 and the water separator 5, the filter screen 8 is prevented from being separated from the inner skeleton 7, and when the water separator 5 and the inner skeleton 7 are fixedly connected, the silica gel sheet 6 arranged between the water separator 5 and the inner skeleton 7 is fixed, and the falling is prevented

Referring to fig. 1 and 4 of the specification, the first ribs 501 are convenient for manual screwing and installation, and are convenient for operating the water separator 5, and the largest outer side of the first ribs 501 is contacted with the inner wall of the lining piece 16, so that the problem of inclination of the internal filter element after installation is prevented.

Specifically, the silica gel piece 6 is connected in semicircle indent 704 departments, and silica gel piece 6 is semicircle structure, and the curved surface of silica gel piece 6 is connected in semicircle indent 704's curved surface inner wall, and silica gel piece 6 keeps away from curved surface one side and is equipped with semicircular cell body, and silica gel piece 6 has certain deformability, under the great circumstances of water pressure, and silica gel piece 6 warp to reach the effect of inhaling the pressure, decompression.

The outer convex rib 901 is far away from outer skeleton 9 one end, the inner convex rib 902 is far away from outer skeleton 9 one end all the sphere design, outer convex rib 901 sphere portion and filter flask 11 inner wall contact, and inner convex rib 902 and support piece 13 external diameter length is shorter one end the surface contact. Specifically, the convex ribs 901 and the inner convex ribs 902 of the spherical design effectively reduce the friction force generated when the outer framework 9 rotates, and can form positioning when the outer framework 9 rotates, so that the problem that the outer framework is prevented from being obliquely clamped under the action of water flow and cannot rotate is solved.

The brush cover 10 is used for hair planting treatment, and the brush hair of the brush cover 10 is internally scraped with the filtering surface of the filter screen 8 and the inner surface of the external scraping filter flask 11. Specifically, referring to fig. 1 and 7 of the specification, a part of bristles on the brush cover 10 is located at the outer side of the outer frame 9, another part of bristles on the brush cover 10 is located at the inner side of the outer frame 9, and the bristles on the brush cover 10 have guiding effect on the input water flow through the action of the plurality of groups of first inclined water diversion blades 502 to form water flow vortex, so that the outer frame 9 is driven to rotate, and impurities on the filter screen 8 and the inner wall surface of the filter flask 11 are scraped and washed through the bristles on the brush cover 10.

Two groups of grooves 1301 are symmetrically formed in the inner wall of the supporting piece 13, the two groups of grooves 1301 are connected with the two groups of second ribs 702 in a matched mode, four groups of third ribs 1302 are fixedly connected to the surface of one end of the supporting piece 13 in a regular annular array mode, a plurality of groups of second inclined water diversion blades 1303 are fixedly connected to the surface of the other end of the supporting piece 13 in a regular annular array mode, and one end, far away from the supporting piece 13, of the third ribs 1302 is in a round corner design. Specifically, referring to fig. 5-6 of the specification and fig. 8 of the specification, after the two sets of second ribs 702 are respectively connected to the two sets of grooves 1301, the supporting element 13 is prevented from rotating under the driving of the rotating water flow by the action of the grooves 1301 and the second ribs 702, and the third ribs 1302 are designed with round corners, so as to cooperate with the rotating exoskeleton 9, reduce friction force and facilitate rotation, and the uniformly distributed second inclined water diversion blades 1303 correspond to the uniformly distributed first inclined water diversion blades 502 on the water diversion device 5, so that the water flow can continue to rotate and flow out of the sewage ball valve 15 during sewage discharge, and the rotation of the exoskeleton 9 is not affected.

Annular sealing grooves are formed in the surfaces of the two ends of the lining piece 16 and in one end, close to the filter flask 11, of the inner insert piece 17, sealing rubber rings are connected in the annular sealing grooves, and a silica gel piece 18 is arranged at the joint between the inner insert piece 17, the valve head 12 and the PPR joint 1. Specifically, through the effect of the sealing rubber ring on the surface of the lining piece 16, water and the fastening piece 3 are isolated from water, the heavy metal ions on the fastening piece 3 and the large sealing piece 4 are prevented from being separated out, gaps between the filter flask 11 and the lining piece 16 are sealed, and the tightness between the filter flask 11 and the inner insert 17 is improved through the effect of the sealing rubber ring between the inner insert 17 and the filter flask 11.

Specifically, the gap between the valve head 12, the insert 17 and the PPR connector 1 is sealed by a silicone member 18.

Specifically, referring to fig. 1 of the specification, the surface of the filter flask 11 is connected with the inner wall surface of one end of the valve head 12 by adopting a threaded structure.

Specifically, the surface of the filter flask 11, the inner wall of the valve head 12, the inner insert 17, the filter flask 11 and other connected components can be sealed by adopting an annular sealing groove and a sealing rubber ring.

Liner 16 and insert 17 are both non-metallic, environmentally friendly materials. Specifically, in the filtering process, water flow and parts of the metal product are separated by the inner plastic part, so that heavy metal ions in the metal parts are prevented from being separated out of the water.

Specifically, by opening or closing the drain ball valve 15, both functions of filtration and drain can be realized.

Specifically, referring to fig. 10 of the specification, when the source water is filtered, the source water is fed from a water inlet end, filtered by the water separator 5 and then filtered by the filter screen 8, and discharged from a water outlet end, a plurality of groups of first inclined water diversion blades 501 are uniformly distributed on the water separator 5, when water flows through the plurality of groups of first inclined water diversion blades 501, the water flows form diversion and generate centrifugal force, so that impurities cannot adhere and accumulate, the outer framework 9 and the brush cover 10 of three groups of planted bristles arranged on the outer framework 9 are driven to synchronously rotate, the bristles on the brush cover 10 are planted on the inner surface and the outer surface of the filter screen 8, and the inner surface of the filter bottle 11 is scraped in the inner scraping manner, so that the brush cover has a cleaning effect.

Specifically, referring to fig. 11 of the specification, when the source water enters from the water inlet end and passes through the water separator 5 and then passes through the supporting element 13, and finally water is discharged from the sewage ball valve 15, when the water enters from the water inlet end and then impacts on the plurality of groups of first inclined water diversion blades 501 on the water separator 5, the water flow forms a water diversion turbulent flow under the action of the plurality of groups of first inclined water diversion blades 501 to generate centrifugal force, the rotating water flow passes through the supporting element 13 which distributes the plurality of groups of second inclined water diversion blades 1303 in the same direction, the rotation of the water flow is not influenced, the water flow can drive the outer framework 9 and the brush cover 10 with three groups of planted bristles arranged on the outer framework 9 to synchronously rotate, the bristles on the brush cover 10 are planted on the inner surface and the outer surface of the filter screen 8, and the inner surface of the outer scraping filter bottle 11 has a cleaning function.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims (10)

1. A plastic-coated transverse prefilter, characterized in that: the novel water separator comprises two groups of PPR connectors (1), two groups of PPR nuts (2), a fastener (3), a large sealing piece (4), a water separator (5), a silica gel sheet (6), an inner framework (7), a filter screen (8), an outer framework (9), three groups of brush covers (10), a filter flask (11), a valve head (12), a supporting piece (13), an insert (14), a pollution discharge ball valve (15), a lining piece (16) and an insert (17);

the two groups of PPR connectors (1) are respectively connected with the two groups of PPR nuts (2), one group of PPR connectors (1) is connected with the fastener (3), and the other group of fastener (3) is connected with the embedded piece (17);

the fastener (3) is connected to the outer side of the large sealing piece (4);

the large sealing element (4) is connected to the outer side of the lining element (16);

the water separator (5) is connected between the lining piece (16) and the inner framework (7);

the silica gel sheet (6) is arranged between the water separator (5) and the inner framework (7);

the filter screen (8) is arranged at the outer side of the inner framework (7);

the outer framework (9) is connected to the outer sides of the inner framework (7) and the filter screen (8), the outer framework (9) is arranged on the inner side of the filter flask (11), three groups of outer convex ribs (901) are fixedly connected to the surface of the outer framework (9) in a regular annular array, and three groups of inner convex ribs (902) are fixedly connected to the inner wall of the outer framework (9) in a regular annular array;

the three groups of brush covers (10) are arranged on the outer framework (9) in a regular annular array;

one end of the filter flask (11) is connected with the fastener (3), and the other end of the filter flask (11) is connected with the valve head (12);

the support piece (13) is connected to the outer side of one end, far away from the silica gel sheet (6), of the inner framework (7), and the support piece (13) is connected to the inner side of the inner insert (17);

the insert (14) is sealed and connected with the lower end of the inner insert (17) through a sealing ring, and the insert (14) is arranged on the inner side of the lower end of the valve head (12);

the blowdown ball valve (15) is arranged at the bottom of the valve head (12).

2. A plastic coated transverse prefilter as defined in claim 1, wherein: the surface of the fastener (3) is provided with a first external thread (301), the outer side of the fastener (3) is fixedly connected with an outer hexagonal sleeve (302), the inner wall of the fastener (3) is provided with a first internal thread (303), and the first external thread (301) is connected with the inner wall of the PPR nut (2) through a thread structure.

3. A plastic coated transverse prefilter as defined in claim 2, wherein: the surface of the large sealing piece (4) is provided with a second external thread (401), the inner side of the large sealing piece (4) is provided with an inner polygonal hole (402), and the second external thread (401) is connected with the first internal thread (303) through a thread structure.

4. A plastic coated transverse prefilter as defined in claim 1, wherein: first protruding muscle (501) of water knockout drum (5) one end fixedly connected with, water knockout drum (5) surface are a plurality of first oblique water diversion blades (502) of regular annular array fixedly connected with, and water knockout drum (5) inboard is equipped with third internal screw thread (503), and water knockout drum (5) are close to first protruding muscle (501) one side and are enclosed construction, and water knockout drum (5) keep away from first protruding muscle (501) one end and are open construction.

5. A plastic coated transverse prefilter as defined in claim 4, wherein: the inner framework (7) outside is equipped with fourth external screw thread (701), fourth external screw thread (701) are connected through screw structure with third internal screw thread (503), inner framework (7) fixed surface is connected with annular terminal surface (703), and annular terminal surface (703) fixed an organic whole is connected with two sets of second protruding muscle (702), and inner framework (7) one end is closing mechanism, and inner framework (7) other end is open structure, and the surface of inner framework (7) closing structure one end is equipped with semicircle indent (704).

6. A plastic coated transverse prefilter as defined in claim 1, wherein: the outer convex rib (901) is far away from one end of the outer framework (9), the inner convex rib (902) is far away from one end of the outer framework (9) and is in spherical design, the spherical part of the outer convex rib (901) is contacted with the inner wall of the filter flask (11), and the inner convex rib (902) is contacted with the surface of one end of the support piece (13) with the shorter outer diameter length.

7. A plastic coated transverse prefilter as defined in claim 1, wherein: the brush cover (10) is used for carrying out bristle planting treatment, and the brush bristles of the brush cover (10) are internally scraped with the filtering surface of the filter screen (8) and the inner surface of the external scraping filter flask (11).

8. A plastic coated transverse prefilter as defined in claim 5, wherein: two groups of grooves (1301) are symmetrically formed in the inner wall of the supporting piece (13), the two groups of grooves (1301) are connected with two groups of second convex ribs (702) in a matched mode, four groups of third convex ribs (1302) are fixedly connected to the surface of one end of the supporting piece (13) in a regular annular array mode, a plurality of groups of second inclined water diversion blades (1303) are fixedly connected to the surface of the other end of the supporting piece (13) in a regular annular array mode, and one end, far away from the supporting piece (13), of each third convex rib (1302) is in a round corner design.

9. A plastic coated transverse prefilter as defined in claim 1, wherein: annular sealing grooves are formed in the surfaces of the two ends of the lining piece (16) and in one end, close to the filter flask (11), of the inner insert piece (17), sealing rubber rings are connected in the annular sealing grooves, and a silica gel piece (18) is arranged at the joint of the inner insert piece (17), the valve head (12) and the PPR joint (1).

10. A plastic coated transverse prefilter as defined in claim 1, wherein: the lining (16) and the insert (17) are both non-metal environment-friendly materials.