CN110652777A - Front filter - Google Patents

Abstract

The invention discloses a pre-filter, comprising a cup body and a valve head. The valve head is provided with a valve head isolation piece covering the inner wall of the middle part of the valve head, and a flow guide covering the water inlet and outlet holes of the valve head. The diversion pipe includes a water inlet pipe and a water outlet pipe, the outer wall of the water inlet pipe is sealed and connected to the water inlet hole of the valve head, and the outer wall of the water outlet pipe is sealed and connected to the water outlet hole of the valve head; the valve head isolation piece is provided with a connection with the water inlet pipe The water inlet channel and the water outlet channel communicated with the water outlet pipe, and the water inlet channel is connected to the water inlet end of the cup body, and the water outlet channel is connected to the water outlet end of the cup body; and the valve head spacers are located on both sides of the water inlet channel. It is connected to the guide pipe, and the valve head spacers are located on both sides of the water outlet channel and are respectively sealed and connected to the guide pipe. By arranging a valve head spacer and a guide pipe for covering the inner wall of the valve head in the valve head, it plays the role of guiding the water flow and isolating the flowing water and the valve head, which can effectively prevent the precipitation of heavy metals in the valve head.

Description

a pre-filter

technical field

The present invention relates to the technical field of filtration and purification, and more particularly, to a pre-filter.

Background technique

The urban water supply pipeline is old and long, and impurities such as rust and sediment in the pipeline will cause the control of the water equipment to fail. Therefore, it is necessary to install a filter device on the water equipment.

The pre-filter is generally installed behind the water meter, and its main function is to restore the tap water to the standard before leaving the factory and protect the downstream equipment. The filtration precision of the pre-filter is 5-100 microns, which can filter impurities such as sediment, rust, floating objects and other impurities seen by the naked eye, which greatly prolongs the service life of subsequent equipment.

Regardless of whether the water is in or out, it will contact the surface of the valve head of the pre-filter. Generally, the valve head of the pre-filter is mostly made of brass. Ordinary brass immersed in water for a long time will continuously precipitate heavy metals into the water, resulting in excessive heavy metals. , which will endanger the health of users; only the use of environmentally friendly low-lead brass as the valve head and components of the pre-filter can meet the water quality requirements stipulated by the state, and the high price of environmentally friendly low-lead brass will increase water filtration. cost.

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

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a pre-filter that is low in cost and can effectively prevent heavy metal precipitation from the valve head.

In order to achieve the above object, the present invention provides the following technical solutions:

A pre-filter, comprising a cup body and a valve head, the valve head is provided with a valve head spacer inserted into the valve head from the interface of the valve head to cover the inner wall of the middle part of the valve head , and a diversion pipe inserted into the valve head spacer from the water inlet hole or the water outlet hole of the valve head to cover the water inlet hole and the water outlet hole of the valve head; the diversion pipe comprises a water inlet pipe With the water outlet pipe, the outer wall of the water inlet pipe is sealingly connected to the water inlet hole, and the outer wall of the water outlet pipe is sealingly connected to the water outlet hole; the valve head isolation piece is provided with an inlet pipe that communicates with the water inlet pipe. a water channel 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 spacer The two sides of the water inlet channel are respectively sealed and connected to the guide pipe, and the valve head spacer is sealed and connected to the guide pipe on both sides of the water outlet channel.

Preferably, the diversion pipe includes a water inlet pipe, a water outlet pipe and a partition plate connected between the water inlet pipe and the water outlet pipe, and the left side of the partition plate is a water inlet channel port that communicates with the water inlet pipe , the right side of the partition plate is a water outlet channel opening communicated with the water outlet pipe, the water inlet channel opening is communicated with the water inlet channel, and the water outlet channel opening is communicated with the water outlet channel.

Preferably, the outer wall of the outer end of the water inlet pipe is provided with a first annular groove, the first annular groove is provided with a first sealing ring, and the first sealing ring is pressed against the water inlet hole and the inlet. between the water pipes; the inner and outer walls of the water inlet pipe are provided with a second annular groove, the second annular groove is provided with a second sealing ring, and the second sealing ring is pressed against the valve head isolation member and the between the water inlet pipes; a third annular groove is arranged on the side wall of the partition plate, and a third sealing ring is arranged on the third annular groove, and the third sealing ring is pressed against the valve head to isolate The outer wall of the inner end of the water outlet pipe is provided with a fourth annular groove, and the fourth annular groove is provided with a fourth sealing ring, and the fourth sealing ring is pressed against the valve between the head spacer and the water outlet pipe; the outer wall of the outer end of the water outlet pipe is provided with a fifth annular groove, the fifth annular groove is provided with a fifth sealing ring, and the fifth sealing ring is pressed against the between the water outlet hole and the water outlet pipe.

Preferably, the cup body includes a bottle body, a filter screen and a skeleton arranged in the bottle body, and also includes a skeleton connecting piece, the upper end of the skeleton connecting piece is inserted into the water outlet channel, and the skeleton connecting piece The lower end of the frame is sleeved on the outer end of the frame, the inner hole of the frame connector forms the water outlet of the cup body and communicates with the water outlet channel, and the outer wall of the frame connector forms the inner wall of the interface. The water inlet end of the cup body is connected to the water inlet channel, and the outer wall of the lower part of the frame connecting piece is also provided with water dividing ribs which are distributed.

Preferably, the outer side wall of the upper end of the frame connecting piece is provided with a sixth annular groove, the sixth annular groove is provided with a sixth sealing ring, and the sixth sealing ring is pressed against the valve head spacer and the frame Between the connecting pieces, a seventh annular groove is arranged on the outer side wall of the upper end of the frame, and a seventh sealing ring is arranged on the seventh annular groove, and the seventh sealing ring is pressed against the frame connecting piece and the between the skeletons.

Preferably, the outer side wall of the upper end of the bottle body is provided with an outer thread, the inner side wall of the interface of the valve head is provided with an inner thread matched with the outer thread, and the upper end side wall of the bottle body is provided with an eighth annular The eighth annular groove is provided with an eighth sealing ring, the lower end of the valve head spacer is provided with a ninth annular groove, and the ninth annular groove is provided with a ninth sealing ring. When screwing on the bottle body, the eighth sealing ring is pressed between the valve head and the bottle body, and the ninth sealing ring is pressed against the valve head spacer and the bottle body between.

Preferably, it also includes movable joints that are respectively connected to the outside of the water inlet hole and the water outlet hole through a union nut, the inner end outer wall of the movable joint is provided with a first boss, and the outer end of the union nut is The inner wall is provided with a first step that cooperates with the first boss, and the union nut is sleeved on the outer wall of the movable joint, so that the first step is pressed against the first boss, so The union nut is matched and connected with the outer threads of the water inlet hole and the water outlet hole, so as to press the movable joint to the outside of the water inlet hole and the water outlet hole respectively;

The inner hole of the movable joint is also provided with a live joint liner for blocking its inner wall, and the inner end outer wall of the live joint liner and the outer end outer wall of the live joint liner respectively pass the tenth through the movable joint. The sealing ring is sealingly connected with the eleventh sealing ring; the inner wall of the inner end of the movable joint is further provided with a second step, and the outer wall of the inner end of the articulated lining is provided with the first step for abutting against the second step. Two protrusions, the movable joint and the water inlet hole and the water outlet hole are respectively provided with a joint gasket for sealing.

Preferably, the middle part of the valve head has an outward protrusion, so as to form an inner cavity for installing the valve head spacer in the middle part of the valve head, and the valve head spacer is provided with an inner cavity for inserting the valve head spacer. The through hole of the 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 the diameter of the water outlet hole, so as to separate the guide pipe from the water outlet. The water inlet hole is inserted in.

Preferably, the inner wall of the through hole is provided with a step surface for limiting the position along the insertion direction of the guide tube, and the guide tube is provided with a shaft shoulder matched with the step surface, and the step surface It includes a first stepped surface and a second stepped surface, the first stepped surface is provided on the inner side of the water inlet channel, the second stepped surface is provided on the outer side of the water outlet channel, and the guide pipe is provided with The first shaft shoulder matched with the first step surface and the second shaft shoulder matched with the second step surface, so that the guide tube forms a three-step structure with a tapered outer diameter.

Preferably, the outer edges of the valve head isolation piece, the guide tube and the frame connecting piece are all provided with chamfers.

In the pre-filter provided by the present invention, by arranging in the valve head a valve head isolation piece and a guide pipe for covering the inner wall of the valve head, and the valve head connecting piece and the guide pipe are matched and connected, the water flow can be guided to the direction of the water flow. And the function of isolating the flowing water and the valve head, which can effectively prevent the heavy metal precipitation in the valve head, and avoid the problem that the heavy metals in the filtered water exceed the standard and endanger health, and the valve head isolation parts and the diversion pipe can be made of low-cost plastic parts, such as, POM polyoxymethylene pipe, ABS pipe, PP pipe, etc., reduce the cost of valve head manufacturing, and have the characteristics of simple structure, easy assembly and disassembly, and low price.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

1 is a schematic diagram of a specific embodiment of a prefilter provided by the present invention;

Figure 2 is a schematic cross-sectional view of a valve head;

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

Fig. 4 is the structural representation of the guide tube;

Fig. 5 is the structural representation of skeleton connector;

Fig. 6 is the structural representation of bottle body;

Fig. 7 is the structural representation of skeleton;

Fig. 8 is the structural representation of the union nut;

Fig. 9 is the structural representation of the movable joint;

Figure 10 is a schematic structural diagram of a live joint liner;

Figure 11 is a schematic structural diagram of a water flow route.

In Figures 1 to 11:

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

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

3-guide pipe, 301-water inlet channel opening, 302-water outlet channel opening, 303-first shoulder, 304-second 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, 312-partition plate;

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

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The core of the present invention is to provide a low-cost pre-filter which can effectively prevent the precipitation of heavy metals from the valve head.

Please refer to FIGS. 1 to 11. FIG. 1 is a schematic diagram of a specific embodiment of a pre-filter provided by the present invention; FIG. 2 is a schematic cross-sectional view of a valve head; FIG. 3 is a cross-sectional schematic diagram of a valve head isolation member; Fig. 5 is the structural schematic diagram of the skeleton connector; Fig. 6 is the structural schematic diagram of the bottle body; Fig. 7 is the structural schematic diagram of the skeleton; Fig. 8 is the structural schematic diagram of the movable nut; Fig. 9 is the structure of the movable joint Schematic diagram; Figure 10 is a schematic structural diagram of a live joint liner; Figure 11 is a structural schematic diagram of a water flow route.

The pre-filter provided by the present invention includes a cup body and a valve head 1. The valve head 1 is provided with a valve head inserted into the valve head 1 from the interface 105 of the valve head 1 to cover the inner wall of the middle part of the valve head 1. The spacer 2, and the guide pipe 3 from the water inlet hole 101 or the water outlet hole 104 of the valve head 1 are inserted into the valve head spacer 2 to cover the water inlet hole 101 and the water outlet hole 104 of the valve head 1; the guide pipe 3. It includes a water inlet pipe 310 and a water outlet pipe 311. The outer wall of the water inlet pipe 310 is sealingly connected to the water inlet hole 101 of the valve head 1, and the outer wall of the water outlet pipe 311 is sealed and connected to the water outlet hole 104 of the valve head 1; There is 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, and 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 The spacers 2 located on both sides of the water inlet channel 201 are sealed and connected to the guide pipe 3 respectively, and the valve head spacer 2 located on both sides of the water outlet channel 202 are sealed and connected to the guide pipe 3 respectively.

Among them, the valve head 1 includes a water inlet hole 101, a water outlet hole 104 and an interface 105 for connecting the cup body. The water inlet hole 101, the water outlet hole 104 and the interface 105 are connected to each other to form a T-shaped flow channel. The valve head spacer 2 is used for The valve head 1 is inserted into the middle of the valve head 1 from the interface 105 of the valve head 1 to cover the inner wall of the middle part of the valve head 1. The valve head spacer 2 is provided with a through hole 205 for inserting the guide pipe 3 to guide the flow. The pipe 3 is used to insert the valve head spacer 2 from the water inlet hole 101 or the outlet hole of the valve head 1, and the guide pipe 3 is used to cover the inner walls of both ends of the valve head 1, that is, the guide pipe 3 is used to cover the valve head. 1. The inner wall of the water inlet hole 101 and the water outlet hole 104, therefore, the inner wall of the valve head 1 can be separated from the flowing water, so as to prevent the precipitation of heavy metals.

The diversion pipe 3 includes a water inlet pipe 310, a water outlet pipe 311, and a partition 312 arranged between the water inlet pipe 310 and the water outlet pipe 311. The water inlet pipe 310 corresponds to the water inlet hole 101 on the valve head 1, and serves as a water flow for filtering tap water. Therefore, the length of the guide pipe 3 should be equal to the length of the valve head 1 to ensure that the guide pipe 3 can completely cover the inner wall of the valve head 1 . The water outlet pipe 311 corresponds to the water outlet hole 104 on the valve head 1 as a water outlet, and the outer wall of the water inlet pipe 310 is sealed with the water inlet hole 101 of the valve head 1, and the outer wall of the water outlet pipe 311 is connected with the water outlet hole 104 of the valve head 1. The connection is sealed to prevent the water flow from entering the inner wall of the valve head 1 from the connection between the guide pipe 3 and the valve head 1, resulting in the precipitation of heavy metals.

The valve head spacer 2 is provided with a water inlet channel 201 that communicates with the water inlet pipe 310, and a water outlet channel 202 that communicates with the water outlet pipe 311. The water inlet channel 201 is also used to communicate with the water inlet end of the cup body, and the water outlet channel 202 is also used for It is connected to the water outlet end of the cup body, so that the water entering from the water inlet pipe 310 flows through the water inlet pipe 310 into the water inlet end of the cup body for filtering, and then flows out from the water outlet end of the cup body through the water outlet channel 202 into the water outlet pipe 311, And the valve head spacer 2 on both sides of the water inlet channel 201 is sealed with the guide pipe 3, and the valve head spacer 2 on both sides of the water outlet channel 202 is sealed with the guide pipe 3, so it can prevent the water flow from The connection between the two enters the inner wall of the valve head 1 to prevent the precipitation of heavy metals.

Therefore, in the pre-filter provided by the present invention, the valve head spacer 2 and the guide pipe 3 are arranged in the valve head 1 for covering the inner wall of the valve head 1, and the valve head 1 connecting piece is matched with the guide pipe 3 The connection can play the role of guiding the water flow and isolating the flowing water and the valve head 1, so as to effectively prevent the precipitation of heavy metals in the valve head 1, and avoid the problem that the heavy metals in the filtered water exceed the standard and endanger health. 3. Low-cost plastic parts can be used, such as POM polyoxymethylene pipe, ABS pipe, PP pipe, etc., to reduce the manufacturing cost of the valve head 1, and have the characteristics of simple structure, easy assembly and disassembly, and low price.

On the basis of the above embodiment, considering the specific arrangement of the guide pipe 3 , preferably, the guide pipe 3 includes a water inlet pipe 310 , a water outlet pipe 311 and a partition connected between the water inlet pipe 310 and the water outlet pipe 311 . 312, the left side of the baffle 312 is the inlet port 301 that communicates with the inlet pipe 310, the right side of the baffle 312 is the outlet port 302 that communicates with the outlet pipe 311, the inlet port 301 is communicated with the inlet port 201, and the outlet The water passage opening 302 communicates with the water outlet channel 202 .

On the basis of the above embodiment, considering the specific arrangement of the sealing connection between the diversion pipe 3 and the valve head spacer 2, preferably, 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. The annular groove 305 is provided with a first sealing ring 4, and the first sealing ring 4 is pressed between the water inlet hole 101 and the water inlet pipe 310; the inner end and outer wall of the water inlet pipe 310 are provided with a second annular groove 306, the second annular groove 306 is provided with a second sealing ring 5, the second sealing ring 5 is pressed between the valve head spacer 2 and the water inlet pipe 310; the side wall of the partition plate 312 is provided with a third annular groove 307, the third annular groove 307 is provided with a third sealing ring 6, and the third sealing ring 6 is pressed between the valve head spacer 2 and the partition plate 312; the inner and outer walls of the water outlet pipe 311 are provided with a fourth annular groove 308, and the fourth annular groove 308 There is a fourth sealing ring 7 on it, and the fourth sealing ring 7 is pressed between the valve head spacer 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, A fifth sealing ring 8 is provided, and the fifth sealing ring 8 is pressed between the water outlet hole 104 and the water outlet pipe 311 .

Wherein, the first annular groove 305 , the second annular groove 306 , the third annular groove 307 , the fourth annular groove 308 and the fifth annular groove 309 may be arc-shaped annular grooves, the first sealing ring 4 , the second sealing ring 5. The third sealing ring 6, the fourth sealing ring 7 and the fifth sealing ring 8 can be O-rings. 4. The second sealing ring 5 , the third sealing ring 6 , the fourth sealing ring 7 and the fifth sealing ring 8 are compressed, so as to realize the sealing effect, and place the water flow into the inner wall of the valve head 1 .

On the basis of the above embodiment, preferably, the cup body includes a bottle body 12, a filter screen 14 and a frame 13 arranged in the bottle body 12, and also includes a frame connector 11, and the upper end of the frame connector 11 is inserted into the water outlet In the channel 202, the lower end of the skeleton connector 11 is sleeved on the outer end of the skeleton 13, the inner hole 1102 of the skeleton connector 11 forms the water outlet end of the cup body and is connected to the water outlet channel 202, the outer wall of the skeleton connector 11 and the valve head 1 The inner wall of the interface 105 forms the water inlet end of the cup body and communicates with the water inlet channel 201 , and the lower outer wall of the skeleton connecting piece 11 is also provided with distributed water dividing ribs 1103 .

In this embodiment, the skeleton connector 11 is arranged between the skeleton 13 and the valve head isolation member 2, so that the water inlet channel 201 on the valve head isolation member 2 is communicated with the water inlet end of the cup body filter, and the valve head 1 is connected. The water outlet channel 202 on the connector is communicated with the water outlet end of the filtered water of the cup body, that is, the frame connector 11 plays the role of connecting the frame 13 and the valve head isolation member 2, and separates the filtered water inlet end from the water outlet end, So that the water inlet end communicates with the water inlet channel 201 of the valve head 1 connector, and the water outlet end communicates with the water outlet channel 202 of the valve head 1 . Among them, the bottle body 12 is used for internal water storage, giving the flowing water a certain filtering space; the filter screen 14 is used for impurities, and the frame 13 is used to support the filter screen 14 to prevent the filter screen 14 from being deformed under the action of water pressure. In addition, the lower outer wall of the skeleton connecting member 11 is also provided with water separation ribs 1103 which are distributed. The water separation ribs 1103 are used to allow the unfiltered water to be evenly distributed when entering the bottle body 12, which is conducive to uniform filtration.

On the basis of the above-mentioned embodiment, in order to prevent the water flow from flowing into the water outlet from the connection between the frame connector 11 and the frame 13 and the connection between the frame connector 11 and the valve head isolation member 2, and the problem of reducing the filtering effect, it is preferred to A sixth annular groove 1101 is provided on the outer side wall of the upper end of the frame connecting member 11, and a sixth sealing ring 9 is arranged on the sixth annular groove 1101, and the sixth sealing ring 9 is pressed against the valve head isolation member 2 and the frame connecting member 11. In between, a seventh annular groove 1301 is formed on the outer side wall of the upper end of the frame 13 , and a seventh sealing ring 10 is formed on the seventh annular groove 1301 . In order to realize the sealing connection between the skeleton connecting piece 11 and the valve head isolation piece 2, and the skeleton connecting piece 11 and the skeleton 13, so as to ensure 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, considering the specific way 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 outer thread 1201, and the upper end side wall of the bottle body 12 is provided with an eighth annular ring 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, and the ninth annular groove is provided with a ninth sealing ring 16, when the valve head 1 is tightened on the bottle body At 12:00, 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 12 .

In this embodiment, the valve head 1 is connected with the bottle body 12 through a wire port, wherein the eighth sealing ring and the ninth sealing ring can also be O-rings, and the eighth sealing ring 15 is installed in the eighth annular groove of the bottle body. On 1202, when the inner thread 106 at the end of the valve head 1 is screwed with the outer thread 1201 of the bottle body 12, the eighth sealing ring 15 is squeezed by the bottle body 12 and the valve head 1 to form a seal. The ninth sealing ring 16 is installed in the ninth annular groove 206 on the lower end surface of the valve head spacer 2. When the inner thread 106 of the end of the valve head 1 is screwed with the outer thread 1201 of the bottle body 12, the ninth annular groove is formed. 206 is squeezed by the bottle body 12 and the valve head spacer 2 to form a seal. The above two O-rings form a double seal. When a single O-ring leaks or is damaged, it will not cause water to leak from the gap between the two threads to the outside of the bottle.

On the basis of the above embodiment, considering the connection method between the valve head 1 and the outer pipe, it is preferable to further include the movable joint 20 connected to the outside of the water inlet hole 101 and the water outlet hole 102 through the union nut 17, respectively. The inner wall of the inner end of 20 is provided with a first boss 2001, the inner wall of the outer end of the union nut 17 is provided with a first step 1701 that cooperates with the first boss 2001, and the union nut 17 is sleeved on the outer wall of the movable joint 20 to The first step 2001 is pressed against the first boss 1701, and the union nut 17 is connected with the external threads of the water inlet hole 101 and the water outlet hole 102, so as to press the movable joint 20 to the water inlet hole 101 and the water outlet hole 102 respectively. outside;

Between the movable joint 20 and the water inlet hole 101 and the water outlet hole 102 are respectively provided with a joint gasket 18 for sealing, and the inner hole of the movable joint 20 is also provided with a joint lining 22 for blocking its inner wall. The inner end outer wall of the liner 22 and the outer end outer wall of the articulated inner liner 22 are respectively sealed with the movable joint 20 through the tenth sealing ring 19 and the eleventh sealing ring 21. The inner wall of the inner end of the movable joint 20 is also provided with a second sealing ring. In the step 2002 , the inner end outer wall of the articulated liner is provided with a second protrusion 2201 for abutting against the second step 2002 .

Wherein, the union nut 17 can be made of copper, and has an inner thread, which is used to connect the outer thread of the water inlet hole 101 and the water outlet hole 102 of the valve head 1 . When tightening, the valve head 1 and the movable joint 20 can be tightened, thereby compressing the joint gasket 18 to achieve the function of sealing the valve head 1 and the movable joint 20, and the joint nut 17 does not contact water. The union gasket 18 is used to seal the valve head 1 and the movable joint 20, and preferably, it can be a rubber or polytetrafluoroethylene gasket.

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

The movable joint 20 has an external thread for connecting the water pipe of the family, and the second step 2002 is in contact with the second boss 2201 of the union lining 22 to limit the union lining 22 and prevent the union lining 22 slide out. The flexible joint liner 22 is inserted into the movable joint 20 from the inner end of the flexible joint 20 to prevent the tap water from contacting the flexible joint 20 , and is made of plastic to prevent the precipitation of heavy metal elements. The first boss 1701 and the first step 1701 are in contact with the first boss 2001 of the movable joint 20 to limit the articulated lining 22 and prevent the articulated lining 22 from slipping out.

On the basis of any of the above embodiments, considering the specific manner in which the valve head spacer 2 and the guide tube 3 are installed on the valve head 1, preferably, the middle part of the valve head 1 has an outward protrusion 102 to The middle of the valve head 1 forms an inner cavity 103 for installing the valve head spacer 2. The valve head spacer 2 is provided with a through hole 205 for inserting the guide tube 3. The through hole 205 is respectively connected with the water inlet hole 101 and the water outlet. The hole 104 is flush, and the diameter of the water inlet hole 101 is larger than that of the water outlet hole 104 , so that the guide tube 3 can be inserted from the water inlet hole 104 .

The inner cavity 103 can be a cylindrical inner cavity 103, and the cylindrical inner cavity 103 intersects with the inner wall of the interface 105 to form a limit plane, so that when the valve head spacer 2 is inserted into the valve head 1 from the interface 105, the limit The position plane can limit the valve head spacer 2, so that the through hole 205 on the valve head spacer 2 is flush with the water inlet hole 101 and the water outlet hole 104 of the valve head 1, so that the guide tube 3 can be inserted . And because the water pressure on the plane is the same, the valve head spacer 2 should not be damaged under the action of uneven water pressure.

The diameter of the water inlet hole 101 of the valve head 1 is larger than the diameter of the water outlet hole 104. Correspondingly, the guide pipe 3 should also be a structure in which the outer diameter of the water inlet pipe 310 matched with the valve head 1 is larger than the outer diameter of the water outlet pipe 311, so as to further improve the The convenience of inserting the guide tube 3 into the valve head 1 is to insert the guide tube 3 into the valve head 1 and the valve head spacer 2 from the water inlet hole 101 with a larger diameter.

On the basis of the above embodiment, preferably, the inner wall of the through hole 205 is provided with a stepped surface for limiting along the insertion direction of the guide tube 3 , and the guide tube 3 is provided with a shoulder matched with the stepped surface. In order to insert the guide tube 3 into the through hole 205 of the connector of the valve head 1, when the shoulder of the guide tube 3 is pressed against the stepped surface of the through hole 205, it means that the insertion is in place, thereby improving the insertion It is convenient, and can avoid the problem that the guide tube 3 is inserted or not inserted in place when the valve head 1 is inserted.

On the basis of the above embodiment, considering the specific arrangement of the shaft shoulder and the stepped surface, preferably, the stepped surface includes a first stepped surface 203 and a second stepped surface 204, and the first stepped surface 203 is provided in the water inlet channel 201. The inner side of the second step surface 204 is arranged on the outer side of the water outlet channel 202, and the guide tube 3 is provided with a first shaft shoulder 303 that cooperates with the first step surface 203 and a second shaft shoulder 304 that cooperates with the second step surface 204, So that the guide tube 3 forms a three-step structure with a tapered outer diameter.

In this embodiment, the valve body spacer and the guide pipe 3 are both three-step structures, the through hole 205 of the valve body spacer is provided with a first stepped surface 203 and a second stepped surface 204, and the guide pipe 3 is provided with a first stepped surface 203 and a second stepped surface 204. The first shoulder 303 and the second shoulder 304 are matched with the valve body, and the first step surface 203 is arranged inside the water inlet channel 201 to cooperate with the first shoulder 303 arranged on the partition plate 312, and the second The stepped surface 204 is provided on the outer side of the water outlet channel 202 to match with the second shaft shoulder 304 provided on the inner end of the water outlet pipe 311 , so as to play the role of double positioning.

On the basis of the above embodiment, preferably, the outer edges of the valve head spacer 2 , the guide tube 3 , the movable lining 22 and the frame connecting member 11 are all provided with chamfers. In the process of assembling, the chamfer can play a guiding role, which facilitates the plug-in connection of various components, and can avoid cutting the sealing ring during the plug-in process. In addition, the valve head spacer 2 , the guide tube 3 , the movable lining 22 and the skeleton connecting member 11 can be made of non-metallic environment-friendly materials, such as POM, PP, or food-grade ABS.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

The pre-filter provided by the present invention has been described in detail above. The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (10)

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.

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