阅读说明：本技术 一种前置过滤器 (Front filter ) 是由 胡效军 陈志超 于 2019-11-07 设计创作，主要内容包括：本发明公开了一种前置过滤器,包括杯体和阀头,阀头内设有遮住阀头中部内壁的阀头隔离件、以及遮住阀头的进水孔与出水孔的导流管；导流管包括进水管与出水管,进水管的外壁密封连接于阀头的进水孔,出水管的外壁密封连接于阀头的出水孔；阀头隔离件上设有与进水管连通的进水通道以及与出水管连通的出水通道,且进水通道连通于杯体的进水端,出水通道连通于杯体的出水端；且阀头隔离件位于进水通道的两侧分别密封连接于导流管,阀头隔离件位于出水通道的两侧分别密封连接于导流管。通过在阀头内设置用于遮住阀头内壁的阀头隔离件与导流管,起到水流引向以及隔离流水与阀头的作用,可有效防止阀头的重金属析出。(The invention discloses a pre-filter, which comprises a cup body and a valve head, wherein a valve head isolating piece for covering the inner wall of the middle part of the valve head and a flow guide pipe for covering a water inlet hole and a water outlet hole of the valve head are arranged in the valve head; the guide pipe comprises a water inlet pipe and a water outlet pipe, the outer wall of the water inlet pipe is connected with the water inlet hole of the valve head in a sealing mode, and the outer wall of the water outlet pipe is connected with the water outlet hole of the valve head in a sealing mode; the valve head isolating piece is provided with a water inlet channel communicated with the water inlet pipe and a water outlet channel communicated with the water outlet pipe, the water inlet channel is communicated with the water inlet end of the cup body, and the water outlet channel is communicated with the water outlet end of the cup body; and the valve head isolating pieces are positioned on two sides of the water inlet channel and are respectively connected to the flow guide pipe in a sealing manner, and the valve head isolating pieces are positioned on two sides of the water outlet channel and are respectively connected to the flow guide pipe in a sealing manner. Through set up valve head separator and the honeycomb duct that is used for hiding the valve head inner wall in the valve head, play rivers and guide to and keep apart the effect of flowing water and valve head, can prevent effectively that the heavy metal of valve head from appearing.)

1. A pre-filter is characterized by comprising a cup body and a valve head (1), wherein a valve head separator (2) inserted into the valve head (1) from a connector (105) of the valve head (1) to shield the inner wall of the middle part of the valve head (1) and a flow guide pipe (3) inserted into the valve head separator (2) from a water inlet hole (101) or a water outlet hole (104) of the valve head (1) to shield the water inlet hole (101) and the water outlet hole (104) of the valve head (1) are arranged in the valve head (1); the draft tube (3) comprises a water inlet tube (310) and a water outlet tube (311), the outer wall of the water inlet tube (310) is connected to the water inlet hole (101) in a sealing mode, and the outer wall of the water outlet tube (311) is connected to the water outlet hole (104) in a sealing mode; the valve head isolating piece (2) is provided with a water inlet channel (201) communicated with the water inlet pipe (310) and a water outlet channel (202) communicated with the water outlet pipe (311), the water inlet channel (201) is communicated with the water inlet end of the cup body, and the water outlet channel (202) is communicated with the water outlet end of the cup body; the valve head isolating piece (2) is located on two sides of the water inlet channel (201) and is respectively connected to the flow guide pipe (3) in a sealing mode, and the valve head isolating piece (2) is located on two sides of the water outlet channel (202) and is respectively connected to the flow guide pipe (3) in a sealing mode.

2. The prefilter of claim 1 wherein said flow conduit (3) comprises an inlet pipe (310), an outlet pipe (311), and a partition (312) connected between said inlet pipe (310) and said outlet pipe (311), wherein the left side of said partition (312) is an inlet flow port (301) in communication with said inlet pipe (310), the right side of said partition (312) is an outlet flow port (302) in communication with said outlet pipe (311), said inlet flow port (301) is in communication with said inlet channel (201), and said outlet flow port (302) is in communication with said outlet channel (202).

3. The pre-filter device as set forth in claim 2, characterized in that the outer end of the water inlet pipe (310) is provided with a first annular groove (305), the first annular groove (305) is provided with a first sealing ring (4), and the first sealing ring (4) is compressed between the water inlet hole (101) and the water inlet pipe (310);

a second annular groove (306) is formed in the outer wall of the inner end of the water inlet pipe (310), a second sealing ring (5) is arranged on the second annular groove (306), and the second sealing ring (5) is tightly pressed between the valve head isolating piece (2) and the water inlet pipe (310);

a third annular groove (307) is formed in the side wall of the partition plate (312), a third sealing ring (6) is arranged on the third annular groove (307), and the third sealing ring (6) is tightly pressed between the valve head isolating piece (2) and the partition plate (312);

a fourth annular groove (308) is formed in the outer wall of the inner end of the water outlet pipe (311), a fourth sealing ring (7) is arranged on the fourth annular groove (308), and the fourth sealing ring (7) is pressed between the valve head isolating piece (2) and the water outlet pipe (311);

the outer end outer wall of outlet pipe (311) is equipped with fifth annular groove (309), be equipped with fifth sealing washer (8) on fifth annular groove (309), fifth sealing washer (8) compress tightly in apopore (104) with between outlet pipe (311).

4. The pre-filter of claim 1, wherein the cup body comprises a bottle body (12), a filter screen (14) and a framework (13) which are arranged in the bottle body (12), and a framework connecting piece (11), wherein the upper end of the framework connecting piece (11) is inserted into the water outlet channel (202), the outer end of the framework (13) is sleeved with the lower end of the framework connecting piece (11), the water outlet end of the cup body is formed by an inner hole (1102) of the framework connecting piece (11) and communicated with the water outlet channel (202), the water inlet end of the cup body is formed by the outer wall of the framework connecting piece (11) and the inner wall of the connector (105) and communicated with the water inlet channel (201), and water distributing ribs (1103) are further arranged on the outer wall of the lower portion of the framework connecting piece (11).

5. The prefilter of claim 4 wherein a sixth annular groove (1101) is provided on the outer side wall of the upper end of said skeleton connecting member (11), a sixth sealing ring (9) is provided on said sixth annular groove (1101), said sixth sealing ring (9) is compressed between said valve head spacer (2) and said skeleton connecting member (11), a seventh annular groove (1301) is provided on the outer side wall of the upper end of said skeleton (13), a seventh sealing ring (10) is provided on said seventh annular groove (1301), and said seventh sealing ring (10) is compressed between said skeleton connecting member (11) and said skeleton (13).

6. The pre-filter as set forth in claim 5, wherein the outer side wall of the upper end of the bottle body (12) is provided with an external thread (1201), the inner side wall of the interface (105) of the valve head (1) is provided with an internal thread (106) matched with the external thread (1201), an eighth annular groove (1202) is formed in the side wall of the upper end of the bottle body (12), an eighth sealing ring (15) is arranged on the eighth annular groove (1202), a ninth annular groove (206) is formed in the lower end face of the valve head isolating piece (2), a ninth sealing ring (16) is arranged on the ninth annular groove (206), when the valve head (1) is screwed on the bottle body (12), the eighth sealing ring (15) is pressed between the valve head (1) and the bottle body (12), the ninth sealing ring (16) is pressed between the valve head isolating piece (2) and the bottle body (12).

7. The prefilter of claim 1 further comprising a movable joint (20) connected to the outer sides of said water inlet hole (101) and said water outlet hole (104) respectively through a movable joint nut (17), wherein the outer wall of the inner end of said movable joint (20) is provided with a first boss (2001), the inner wall of the outer end of said movable joint nut (17) is provided with a first step (1701) matched with said first boss (2001), said movable joint nut (17) is sleeved on the outer wall of said movable joint (20) so as to press said first step (1701) against said first boss (2001), said movable joint nut (17) is matched and connected with the external threads of said water inlet hole (101) and said water outlet hole (104) so as to press said movable joint (20) to the outer sides of said water inlet hole (101) and said water outlet hole (104) respectively;

a loose joint lining (22) used for blocking the inner wall of the movable joint (20) is further arranged in the inner hole of the movable joint, and the inner end outer wall and the outer end outer wall of the loose joint lining (22) are respectively in sealing connection with the movable joint (20) through a tenth sealing ring (19) and an eleventh sealing ring (21); a second step (2002) is further arranged on the inner end inner wall of the movable joint (20), a second protrusion (2201) used for abutting against the second step (2002) is arranged on the inner end outer wall of the movable joint lining (22), and movable joint gaskets (18) used for sealing are respectively arranged between the movable joint (20) and the water inlet hole (101) and between the movable joint and the water outlet hole (104).

8. The prefilter of any one of claims 1 to 7 wherein the valve head (1) has an outward protrusion (102) at its middle to form an inner cavity (103) for mounting the valve head spacer (2) at the middle of the valve head (1), the valve head spacer (2) is provided with a through hole (205) for inserting the flow guide tube (3), the through hole (205) is flush with the water inlet hole (101) and the water outlet hole (104), respectively, the diameter of the water inlet hole (101) is larger than that of the water outlet hole (104) to insert the flow guide tube (3) from the water inlet hole (101).

9. The prefilter of claim 8 wherein the inner wall of said through hole (205) is provided with a step surface for limiting along the insertion direction of said flow guiding tube (3), said flow guiding tube (3) is provided with a shoulder for engaging with said step surface, said step surface comprises a first step surface (203) and a second step surface (204), said first step surface (203) is disposed at the inner side of said water inlet channel (201), said second step surface (204) is disposed at the outer side of said water outlet channel (202), said flow guiding tube (3) is provided with a first shoulder (303) engaging with said first step surface (203) and a second shoulder (304) engaging with said second step surface (204), so that said flow guiding tube (3) forms a three-step structure with a gradually reduced outer diameter.

10. The prefilter of claim 9 wherein the outer edges of said valve head partition (2), said flow conduit (3) and said skeleton connection (11) are chamfered.

Technical Field

The invention relates to the technical field of filtration and purification, in particular to a pre-filter.

Background

Urban water supply pipelines are old and long, and the control of water utilization equipment fails due to the fact that impurities such as corrosion and silt of the pipelines need to be arranged on the water utilization equipment.

The pre-filter is generally arranged behind the water meter and mainly used for restoring tap water to the standard before leaving a factory and protecting downstream equipment. The pre-filter has a filtering precision of 5-100 microns, can filter impurities such as silt, rust, flotage and the like seen by naked eyes, and greatly prolongs the service life of subsequent equipment.

The valve head of the pre-filter is mostly made of brass, and the common brass can continuously separate out heavy metals into water after being soaked in the water for a long time, so that the heavy metals exceed the standard, and further the body health of a user can be harmed; only the valve head and the parts of the pre-filter are made of environment-friendly low-lead brass, so that the water quality requirement of effluent water specified by the state can be met, and the water filtering cost can be increased due to the high price of the environment-friendly low-lead brass.

Therefore, how to solve the problem of heavy metal precipitation from the valve head at a low cost is a problem to be solved urgently by those skilled in the art.

Disclosure of Invention

In view of the above, the present invention provides a pre-filter which is low in cost and can effectively prevent the valve head from precipitating heavy metals.

In order to achieve the above purpose, the invention provides the following technical scheme:

a pre-filter comprises a cup body and a valve head, wherein a valve head isolating piece inserted into the valve head from an interface of the valve head to shield the inner wall of the middle part of the valve head and a flow guide pipe inserted into the valve head isolating piece from a water inlet hole or a water outlet hole of the valve head to shield the water inlet hole and the water outlet hole of the valve head are arranged in the valve head; the flow guide pipe comprises a water inlet pipe and a water outlet pipe, the outer wall of the water inlet pipe is connected with the water inlet hole in a sealing mode, and the outer wall of the water outlet pipe is connected with the water outlet hole in a sealing mode; the valve head isolating piece is provided with a water inlet channel communicated with the water inlet pipe and a water outlet channel communicated with the water outlet pipe, the water inlet channel is communicated with the water inlet end of the cup body, and the water outlet channel is communicated with the water outlet end of the cup body; the valve head isolating piece is located the both sides of inhalant canal are sealing connection respectively in the honeycomb duct, the valve head isolating piece is located the both sides of exhalant canal are sealing connection respectively in the honeycomb duct.

Preferably, the honeycomb duct includes inlet tube, outlet pipe and connect in the inlet tube with baffle between the outlet pipe, the left side of baffle be with the water inlet runner mouth of inlet tube intercommunication, the right side of baffle be with the play water runner mouth of outlet pipe intercommunication, the water inlet runner mouth with inhalant canal intercommunication, go out the water runner mouth with go out the water channel intercommunication.

Preferably, a first annular groove is formed in the outer wall of the outer end of the water inlet pipe, a first sealing ring is arranged on the first annular groove, and the first sealing ring is tightly pressed between the water inlet hole and the water inlet pipe; a second annular groove is formed in the outer wall of the inner end of the water inlet pipe, a second sealing ring is arranged on the second annular groove, and the second sealing ring is tightly pressed between the valve head isolating piece and the water inlet pipe; a third annular groove is formed in the side wall of the partition plate, a third sealing ring is arranged on the third annular groove, and the third sealing ring is tightly pressed between the valve head isolating piece and the partition plate; a fourth annular groove is formed in the outer wall of the inner end of the water outlet pipe, a fourth sealing ring is arranged on the fourth annular groove, and the fourth sealing ring is tightly pressed between the valve head isolating piece and the water outlet pipe; the outer end outer wall of outlet pipe is equipped with the fifth ring channel, be equipped with the fifth sealing washer on the fifth ring channel, the fifth sealing washer compress tightly in the apopore with between the outlet pipe.

Preferably, the cup includes the bottle, locates filter screen and skeleton in the bottle still include the skeleton connecting piece, the upper end cartridge of skeleton connecting piece in the exhalant canal, the lower pot head of skeleton connecting piece is located the outer end of skeleton, the hole of skeleton connecting piece forms the outlet end of cup and communicate in the exhalant canal, the outer wall of skeleton connecting piece with the inner wall of interface forms the inlet end of cup and communicate in inhalant canal, the lower part outer wall department of skeleton connecting piece still is equipped with the branch water muscle that all has the distribution.

Preferably, the outer side wall of the upper end of the framework connecting piece is provided with a sixth annular groove, a sixth sealing ring is arranged on the sixth annular groove, the sixth sealing ring is tightly pressed between the valve head isolating piece and the framework connecting piece, the outer side wall of the upper end of the framework is provided with a seventh annular groove, a seventh sealing ring is arranged on the seventh annular groove, and the seventh sealing ring is tightly pressed between the framework connecting piece and the framework.

Preferably, the upper end lateral wall of bottle is equipped with the external screw thread, the inside wall of the interface of valve head be equipped with thread fit's internal thread, the upper end lateral wall of bottle is equipped with the eighth ring channel, be equipped with the eighth sealing washer on the eighth ring channel, the lower extreme of valve head spacer is equipped with the ninth ring channel, be equipped with the ninth sealing washer on the ninth ring channel, work as the valve head screw up in during the bottle, compress tightly on the eighth sealing washer in the valve head with between the bottle, the ninth sealing washer compress tightly in the valve head spacer with between the bottle.

Preferably, the water inlet device further comprises a movable joint respectively connected to the outer sides of the water inlet hole and the water outlet hole through a movable joint nut, a first boss is arranged on the outer wall of the inner end of the movable joint, a first step matched with the first boss is arranged on the inner wall of the outer end of the movable joint nut, the movable joint nut is sleeved on the outer wall of the movable joint so that the first step is pressed on the first boss, and the movable joint nut is matched and connected with the external threads of the water inlet hole and the water outlet hole so that the movable joint is respectively pressed on the outer sides of the water inlet hole and the water outlet hole;

a loose joint lining used for blocking the inner wall of the movable joint is further arranged in the inner hole of the movable joint, and the outer wall of the inner end of the loose joint lining and the outer wall of the outer end of the loose joint lining are respectively in sealing connection with the movable joint through a tenth sealing ring and an eleventh sealing ring; the inner wall of the movable joint is also provided with a second step, the inner outer wall of the loose joint lining is provided with a second bulge used for supporting the second step, and loose joint gaskets used for sealing are respectively arranged between the movable joint and the water inlet and the water outlet.

Preferably, the valve head has an outward protrusion in the middle to form an inner cavity for installing the valve head spacer in the middle of the valve head, the valve head spacer is provided with a through hole for inserting the flow guide pipe, the through hole is flush with the water inlet hole and the water outlet hole respectively, and the diameter of the water inlet hole is larger than that of the water outlet hole to insert the flow guide pipe into the valve head spacer from the water inlet hole.

Preferably, the inner wall of the through hole is provided with a step surface used for limiting along the direction of insertion of the flow guide pipe, the flow guide pipe is provided with a shaft shoulder matched with the step surface, the step surface comprises a first step surface and a second step surface, the first step surface is arranged on the inner side of the water inlet channel, the second step surface is arranged on the outer side of the water outlet channel, and the flow guide pipe is provided with a first shaft shoulder matched with the first step surface and a second shaft shoulder matched with the second step surface, so that the flow guide pipe forms a three-step structure with gradually reduced outer diameter.

Preferably, the valve head isolating piece, the flow guide pipe and the outer edge of the framework connecting piece are provided with chamfers.

According to the pre-filter provided by the invention, the valve head isolating piece and the flow guide pipe which are used for shielding the inner wall of the valve head are arranged in the valve head, and the valve head connecting piece is matched and connected with the flow guide pipe, so that the functions of guiding water flow and isolating running water from the valve head can be achieved, heavy metal precipitation of the valve head can be effectively prevented, and the problem that the filtered water is polluted by heavy metal superscript is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of an embodiment of a prefilter of the present invention;

FIG. 2 is a cross-sectional schematic view of the valve head;

FIG. 3 is a cross-sectional schematic view of the valve head spacer;

FIG. 4 is a schematic view of the structure of a draft tube;

FIG. 5 is a schematic structural view of a skeletal connection;

FIG. 6 is a schematic view of the structure of the bottle body;

FIG. 7 is a schematic structural view of a skeleton;

FIG. 8 is a schematic structural view of a union nut;

FIG. 9 is a schematic structural view of a movable joint;

FIG. 10 is a schematic view of a loose joint liner construction;

fig. 11 is a schematic view showing the structure of a water flow path.

In fig. 1 to 11:

1-valve head, 101-water inlet, 102-bulge, 103-inner cavity, 104-water outlet, 105-interface and 106-internal thread;

2-valve head isolating piece, 201-water inlet channel, 202-water outlet channel, 203-first step surface, 204-second step surface, 205-through hole, 206-ninth annular groove;

3-honeycomb duct, 301-water inlet runner port, 302-water outlet runner port, 303-first shaft shoulder, 304-second shaft shoulder, 305-first annular groove, 306-second annular groove, 307-third annular groove, 308-fourth annular groove, 309-fifth annular groove, 310-water inlet pipe, 311-water outlet pipe and 312-clapboard;

4-first sealing ring, 5-second sealing ring, 6-third sealing ring, 7-fourth sealing ring, 8-fifth sealing ring, 9-sixth sealing ring, 10-seventh sealing ring, 11-skeleton connecting piece, 1101-sixth annular groove, 1102-inner hole, 1103-water dividing rib, 12-bottle body, 1201-external thread, 1202-eighth annular groove, 13-skeleton, 1301-seventh annular groove, 14-filter screen, 15-eighth sealing ring, 16-ninth sealing ring, 17-loose joint nut, 1701-first step, 18-loose joint gasket, 19-tenth sealing ring, 20-loose joint, 2001-first boss, 2002-second step, 21-eleventh sealing ring, 22-loose joint lining, 2201-second boss, 2202-tenth annular groove, 2203-eleventh annular groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide a prefilter which has low cost and can effectively prevent the valve head from separating out heavy metal.

Referring to fig. 1 to 11, fig. 1 is a schematic diagram of a prefilter according to an embodiment of the present invention; FIG. 2 is a cross-sectional schematic view of the valve head; FIG. 3 is a cross-sectional schematic view of the valve head spacer; FIG. 4 is a schematic view of the structure of a draft tube; FIG. 5 is a schematic structural view of a skeletal connection; FIG. 6 is a schematic view of the structure of the bottle body; FIG. 7 is a schematic structural view of a skeleton; FIG. 8 is a schematic structural view of a removable nut; FIG. 9 is a schematic structural view of a movable joint; FIG. 10 is a schematic view of a loose joint liner construction; fig. 11 is a schematic view showing the structure of a water flow path.

The invention provides a pre-filter, which comprises a cup body and a valve head 1, wherein a valve head isolating piece 2 which is inserted into the valve head 1 from a connector 105 of the valve head 1 to shield the inner wall of the middle part of the valve head 1 and a flow guide pipe 3 which is inserted into the valve head isolating piece 2 from a water inlet hole 101 or a water outlet hole 104 of the valve head 1 to shield the water inlet hole 101 and the water outlet hole 104 of the valve head 1 are arranged in the valve head 1; the draft tube 3 comprises a water inlet pipe 310 and a water outlet pipe 311, the outer wall of the water inlet pipe 310 is connected with the water inlet hole 101 of the valve head 1 in a sealing mode, and the outer wall of the water outlet pipe 311 is connected with the water outlet hole 104 of the valve head 1 in a sealing mode; the valve head isolating piece 2 is provided with a water inlet channel 201 communicated with the water inlet pipe 310 and a water outlet channel 202 communicated with the water outlet pipe 311, the water inlet channel 201 is communicated with the water inlet end of the cup body, and the water outlet channel 202 is communicated with the water outlet end of the cup body; and the valve head isolating piece 2 is positioned at two sides of the water inlet channel 201 and is respectively connected with the flow guide pipe 3 in a sealing way, and the valve head isolating piece 2 is positioned at two sides of the water outlet channel 202 and is respectively connected with the flow guide pipe 3 in a sealing way.

Wherein, valve head 1 includes inlet opening 101, apopore 104 and the interface 105 that is used for connecting the cup, inlet opening 101, apopore 104 and interface 105 communicate each other and form the flowing water passageway of T type, valve head separator 2 is used for inserting the centre of valve head 1 from valve head 1's interface 105 department, cover with the inner wall at valve head 1's middle part, be equipped with the through-hole 205 that is used for cartridge honeycomb duct 3 on the valve head separator 2, honeycomb duct 3 is used for inserting valve head separator 2 from valve head 1's inlet opening 101 or outlet hole, honeycomb duct 3 is used for covering the inner wall at valve head 1 both ends simultaneously, honeycomb duct 3 is used for covering the inner wall of valve head 1 inlet opening 101 and apopore 104 department, therefore, can separate valve head 1's inner wall and flowing water, in order to play the purpose that prevents that the heavy metal from.

The honeycomb duct 3 includes inlet tube 310, outlet pipe 311 and locates the baffle 312 between inlet tube 310 and outlet pipe 311, and the inlet opening 101 on inlet tube 310 and the valve head 1 is corresponding, and the rivers entry as filtering the running water, consequently, the length of honeycomb duct 3 should equal the length of valve head 1 to guarantee that honeycomb duct 3 can hide the inner wall of valve head 1 completely. The outlet pipe 311 corresponds with apopore 104 on the valve head 1, as the rivers export, and the outer wall of inlet tube 310 and the inlet opening 101 sealing connection of valve head 1, the outer wall of outlet pipe 311 and the apopore 104 sealing connection of valve head 1 to prevent that the rivers from getting into the inner wall of valve head 1 and leading to the heavy metal to appear from the junction of honeycomb duct 3 and valve head 1.

The valve head isolating piece 2 is provided with a water inlet channel 201 communicated with the water inlet pipe 310 and a water outlet channel 202 communicated with the water outlet pipe 311, the water inlet channel 201 is also used for communicating the water inlet end of the cup body, the water outlet channel 202 is also used for connecting the water outlet end of the cup body, so that water entering from the water inlet pipe 310 enters the water inlet end of the cup body through the water inlet pipe 310 and then is filtered, the water outlet end of the cup body enters the water outlet pipe 311 through the water outlet channel 202 and flows out, the two sides of the valve head isolating piece 2, which are positioned on the water inlet channel 201, are both connected with the flow guide pipe 3 in a sealing manner, and the two sides of the valve head isolating piece 2, which are positioned on the water outlet channel 202, are both connected with the flow guide pipe 3 in.

Therefore, the pre-filter provided by the invention has the advantages that the valve head isolating piece 2 and the flow guide pipe 3 which are used for shielding the inner wall of the valve head 1 are arranged in the valve head 1, the valve head 1 connecting piece is matched and connected with the flow guide pipe 3, and the functions of guiding water flow and isolating running water from the valve head 1 can be achieved, so that heavy metal in the valve head 1 can be effectively prevented from being separated out, and the problem that the health is endangered due to the fact that the heavy metal in filtered water exceeds the standard is avoided, and the valve head isolating piece 2 and the flow guide pipe 3 can be made of low-price plastic pieces, such as a POM polyformaldehyde pipe, an ABS pipe, a PP pipe and the like, so.

Based on the above embodiment, in consideration of the specific arrangement mode of the draft tube 3, preferably, the draft tube 3 includes a water inlet tube 310, a water outlet tube 311, and a partition 312 connected between the water inlet tube 310 and the water outlet tube 311, a water inlet channel opening 301 communicated with the water inlet tube 310 is disposed on the left side of the partition 312, a water outlet channel opening 302 communicated with the water outlet tube 311 is disposed on the right side of the partition 312, the water inlet channel opening 301 is communicated with the water inlet channel 201, and the water outlet channel opening 302 is communicated with the water outlet channel 202.

On the basis of the above embodiment, in consideration of the specific arrangement of the sealing connection between the draft tube 3 and the valve head partition 2, it is preferable that the outer wall of the outer end of the water inlet pipe 310 is provided with a first annular groove 305, the first annular groove 305 is provided with a first sealing ring 4, and the first sealing ring 4 is compressed between the water inlet hole 101 and the water inlet pipe 310; a second annular groove 306 is formed in the outer wall of the inner end of the water inlet pipe 310, a second sealing ring 5 is arranged on the second annular groove 306, and the second sealing ring 5 is tightly pressed between the valve head isolating piece 2 and the water inlet pipe 310; a third annular groove 307 is arranged on the side wall of the partition plate 312, a third sealing ring 6 is arranged on the third annular groove 307, and the third sealing ring 6 is tightly pressed between the valve head isolating piece 2 and the partition plate 312; a fourth annular groove 308 is formed in the outer wall of the inner end of the water outlet pipe 311, a fourth sealing ring 7 is arranged on the fourth annular groove 308, and the fourth sealing ring 7 is tightly pressed between the valve head isolating piece 2 and the water outlet pipe 311; the outer wall of the outer end of the water outlet pipe 311 is provided with a fifth annular groove 309, the fifth annular groove 309 is provided with a fifth sealing ring 8, and the fifth sealing ring 8 is tightly pressed between the water outlet hole 104 and the water outlet pipe 311.

Wherein, the first ring channel 305, the second ring channel 306, the third ring channel 307, the fourth ring channel 308 and the fifth ring channel 309 can be arc-shaped ring channels, the first seal ring 4, the second seal ring 5, the third seal ring 6, the fourth seal ring 7 and the fifth seal ring 8 can be O-shaped seal rings, the honeycomb duct 3 is inserted into the valve head 1 and the valve head spacer 2, the first seal ring 4, the second seal ring 5, the third seal ring 6, the fourth seal ring 7 and the fifth seal ring 8 are pressed, thereby realizing the sealing effect, and placing the inner wall of the valve head 1 into which water flows.

On the basis of the above embodiment, preferably, the cup body includes bottle 12, locate filter screen 14 and skeleton 13 in bottle 12, still include skeleton connecting piece 11, the upper end cartridge of skeleton connecting piece 11 is in water outlet channel 202, the outer end of skeleton 13 is located to the lower pot head of skeleton connecting piece 11, the hole 1102 of skeleton connecting piece 11 forms the water outlet end of cup and communicates in water outlet channel 202, the outer wall of skeleton connecting piece 11 forms the water inlet end of cup and communicates in water inlet channel 201 with the inner wall of the interface 105 of valve head 1, the lower part outer wall department of skeleton connecting piece 11 still is equipped with the branch water muscle 1103 that all has the distribution.

In this embodiment, through set up skeleton connecting piece 11 between skeleton 13 and valve head isolating piece 2, with inlet channel 201 and the filterable end intercommunication of intaking of cup on the valve head isolating piece 2, outlet channel 202 and the play water end intercommunication of the filterable back water of cup on the valve head connecting piece 1, skeleton connecting piece 11 plays the effect of connecting skeleton 13 and valve head isolating piece 2 promptly, and separate filterable end of intaking and play water end, so that the intercommunication of end of intaking and inlet channel 201 of valve head 1 connecting piece, make the play water end communicate in outlet channel 202 of valve head 1. Wherein, the bottle body 12 is used for storing water inside and providing a certain filtering space for flowing water; the screen 14 is used for impurities, and the frame 13 is used for supporting the screen 14 to prevent the screen 14 from being deformed by the water pressure. In addition, the outer wall department of the lower part of the skeleton connecting piece 11 is also provided with the water diversion ribs 1103 that are all distributed, and the water diversion ribs 1103 are used for distributing the unfiltered water evenly when entering the bottle body 12, which is beneficial to uniform filtration.

On the basis of the above embodiment, in order to prevent the problem that the filtering effect is reduced as the water flows from the joint between the skeleton connecting piece 11 and the skeleton 13 and the joint between the skeleton connecting piece 11 and the valve head isolating piece 2 into the water outlet end, preferably, the outer side wall of the upper end of the skeleton connecting piece 11 is provided with a sixth annular groove 1101, the sixth annular groove 1101 is provided with a sixth sealing ring 9, the sixth sealing ring 9 is tightly pressed between the valve head isolating piece 2 and the skeleton connecting piece 11, the outer side wall of the upper end of the skeleton 13 is provided with a seventh annular groove 1301, the seventh annular groove 1301 is provided with a seventh sealing ring 10, and the seventh sealing ring 10 is tightly pressed between the skeleton connecting piece 11 and the skeleton. So as to realize the sealing connection of the framework connecting piece 11 and the valve head isolating piece 2, the framework connecting piece 11 and the framework 13, thereby ensuring the filtering effect. Specifically, the sixth sealing ring 9 and the seventh sealing ring 10 are both O-shaped sealing rings.

On the basis of the above embodiment, in consideration of the specific manner of connecting the cup body and the valve head 1, preferably, the outer side wall of the upper end of the bottle body 12 is provided with an external thread 1201, the side wall of the upper end of the bottle body 12 is provided with an eighth annular groove, the eighth annular groove is provided with an eighth sealing ring 15, the lower end of the valve head spacer 2 is provided with a ninth annular groove, the ninth annular groove is provided with a ninth sealing ring 16, when the valve head 1 is screwed on the bottle body 12, the eighth sealing ring 15 is pressed between the valve head 1 and the bottle body 12, and the ninth sealing ring 16 is pressed between the valve head spacer 2 and the bottle body.

In this embodiment, the valve head 1 is connected with the bottle body 12 through a screw fitting, wherein the eighth sealing ring and the ninth sealing ring may also be O-rings, the eighth sealing ring 15 is installed on the eighth annular groove 1202 of the bottle body, and when the internal thread 106 at the end of the valve head 1 is screwed with the external thread 1201 of the bottle body 12, the eighth sealing ring 15 is pressed by the bottle body 12 and the valve head 1 to form a seal. The ninth sealing ring 16 is mounted in the ninth annular groove 206 of the lower end surface of the valve head spacer 2, and when the internal thread 106 of the end of the valve head 1 is screwed with the external thread 1201 of the bottle body 12, the ninth annular groove 206 is pressed by the bottle body 12 and the valve head spacer 2 to form a seal. The two O-shaped rings form a double seal, and when a single O-shaped ring is leaked or damaged, water cannot be leaked out of the bottle body from a gap between the two threads.

On the basis of the above embodiment, in consideration of the connection manner between the valve head 1 and the external connection pipe, it is preferable that the valve further includes a movable joint 20 connected to the outer sides of the water inlet 101 and the water outlet 102 through a movable joint nut 17, the outer wall of the inner end of the movable joint 20 is provided with a first boss 2001, the inner wall of the outer end of the movable joint nut 17 is provided with a first step 1701 matched with the first boss 2001, the movable joint nut 17 is sleeved on the outer wall of the movable joint 20 so that the first step 2001 is pressed against the first boss 1701, and the movable joint nut 17 is connected with the external threads of the water inlet 101 and the water outlet 102 in a matching manner so as to press the movable joint 20 against the outer sides of the water inlet 101 and the water outlet;

a loose joint gasket 18 for sealing is respectively arranged between the movable joint 20 and the water inlet hole 101 and the water outlet hole 102, a loose joint lining 22 for blocking the inner wall of the movable joint 20 is further arranged in the inner hole of the movable joint 20, the outer wall of the inner end of the loose joint lining 22 and the outer wall of the outer end of the loose joint lining 22 are respectively connected with the movable joint 20 through a tenth sealing ring 19 and an eleventh sealing ring 21 in a sealing manner, a second step 2002 is further arranged on the inner wall of the inner end of the movable joint 20, and a second protrusion 2201 for abutting against the second step 2002 is arranged on the outer wall of the inner end of the loose joint lining.

The union nut 17 may be made of copper material, and has an internal thread inside for connecting with the external threads of the water inlet hole 101 and the water outlet hole 102 of the valve head 1. When the valve head 1 and the movable joint 20 are tightened, the loose joint gasket 18 is compressed, the valve head 1 and the movable joint 20 are sealed, and the loose joint nut 17 is not contacted with water. The loose gasket 18, which preferably is a rubber or teflon gasket, serves to seal the valve head 1 and the movable joint 20.

The tenth sealing ring and the eleventh sealing ring can also be O-rings for sealing the movable joint 20 and the movable joint lining 22 to prevent heavy metal precipitation caused by contact between tap water and the movable joint 20, and a tenth annular groove 2202 and an eleventh annular groove 2203 can be respectively arranged on the outer wall of the inner end and the outer wall of the outer end of the movable joint lining 22 for installing the tenth sealing ring 19 and the eleventh sealing ring 21.

The movable joint 20 has an external thread for connecting a household tap water pipe, and the second step 2002 is abutted against the second boss 2201 of the movable joint lining 22 for limiting the movable joint lining 22 and preventing the movable joint lining 22 from sliding out. The loose joint lining 22 is inserted into the movable joint 20 from the inner end of the movable joint 20 to prevent the tap water from contacting the movable joint 20, and is made of plastic material to prevent the heavy metal elements from being separated out. The first boss 1701 and the first step 1701 are in abutting contact with the first boss 2001 of the movable joint 20 to limit the loose joint lining 22 and prevent the loose joint lining 22 from sliding out.

On the basis of any of the above embodiments, considering the specific arrangement of the valve head separator 2 and the fluid guide tube 3 mounted on the valve head 1, it is preferable that the middle part of the valve head 1 has an outward protrusion 102 to form an inner cavity 103 for mounting the valve head separator 2 in the middle part of the valve head 1, the valve head separator 2 is provided with a through hole 205 for inserting the fluid guide tube 3, the through hole 205 is flush with the water inlet hole 101 and the water outlet hole 104 respectively, and the diameter of the water inlet hole 101 is larger than that of the water outlet hole 104 to insert the fluid guide tube 3 from the water inlet hole 104.

Wherein, the inner cavity 103 can be cylindrical inner cavity 103, and the intersection of the inner wall of cylindrical inner cavity 103 and interface 105 forms and is used for with spacing plane to when valve head isolator 2 inserts in the valve head 1 from interface 105, spacing plane can play limiting effect to valve head isolator 2, so that through-hole 205 on the valve head isolator 2 is flushed with inlet opening 101 and apopore 104 of valve head 1, so as to insert honeycomb duct 3. And because the water pressure on the plane is the same, the valve head isolating piece 2 is not easy to be damaged under the action of uneven water pressure.

The diameter of the inlet opening 101 of the valve head 1 is greater than the diameter of the water outlet hole 104, correspondingly, the honeycomb duct 3 should also be the structure that the outer diameter of the inlet pipe 310 matched with the valve head 1 is greater than the outer diameter of the outlet pipe 311, thereby further improving the convenience of inserting the honeycomb duct 3 into the valve head 1, namely inserting the honeycomb duct 3 into the valve head 1 and the valve head spacer 2 from the inlet opening 101 with the larger diameter.

On the basis of the above embodiment, preferably, the inner wall of the through hole 205 is provided with a step surface for limiting along the insertion direction of the draft tube 3, and the draft tube 3 is provided with a shaft shoulder matched with the step surface. So that in the process of inserting the flow guide tube 3 into the through hole 205 of the valve head 1 connector, when the shoulder of the flow guide tube 3 presses the step surface on the through hole 205, the insertion is in place, thereby improving the convenience of the insertion, and avoiding the problem that the flow guide tube 3 is inserted or not inserted in place when the valve head 1 is inserted.

In addition to the above embodiments, in view of the specific arrangement of the shoulder and the step surface, it is preferable that the step surface includes a first step surface 203 and a second step surface 204, the first step surface 203 is disposed on the inner side of the water inlet passage 201, the second step surface 204 is disposed on the outer side of the water outlet passage 202, and the draft tube 3 is provided with a first shoulder 303 engaged with the first step surface 203 and a second shoulder 304 engaged with the second step surface 204, so that the draft tube 3 forms a three-step structure with a tapered outer diameter.

In this embodiment, the valve body spacer and the flow guiding tube 3 are both of a three-step structure, the through hole 205 of the valve body spacer is provided with a first step surface 203 and a second step surface 204, the flow guiding tube 3 is provided with a first shoulder 303 and a second shoulder 304 which are matched with the valve body, the first step surface 203 is arranged at the inner side of the water inlet channel 201 so as to be matched with the first shoulder 303 arranged on the partition 312, and the second step surface 204 is arranged at the outer side of the water outlet channel 202 so as to be matched with the second shoulder 304 arranged at the inner end of the water outlet pipe 311, thereby achieving the double positioning effect.

On the basis of the above embodiment, preferably, the outer edges of the valve head partition 2, the flow pipe 3, the movable liner 22 and the frame connecting piece 11 are provided with chamfers. So that in the assembling process, the chamfer can play a guiding role, the plug-in connection of each component is facilitated, and the sealing ring can be prevented from being cut in the plug-in process. In addition, the valve head partition 2, the flow guide tube 3, the movable lining 22 and the skeleton connecting piece 11 may be made of environment-friendly non-metal materials, such as POM, PP or food-grade ABS.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The prefilter provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.