CN207080647U

CN207080647U - A kind of back washing filter system four-way valve

Info

Publication number: CN207080647U
Application number: CN201720313115.5U
Authority: CN
Inventors: 毛高闻
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-03-28
Filing date: 2017-03-28
Publication date: 2018-03-09
Anticipated expiration: 2027-03-28

Abstract

It the utility model is related to a kind of back washing filter system four-way valve, and back washing filter system is used to remove solid impurity either removal solid impurity or drop from gas from liquid, the impurity on overanxious body is rinsed well by recoiling, so as to reply the filtering function of filtering body；The utility model proposes to improve mainly for Chinese invention patent ZL 2,011 1,035 3118.9 deficiency, flow of inlet water deficiency during solving four-way valve backwash in the technical scheme, influence backwash effect, three inlet and outlet mutual alignment distributions of valve body are single and seal the problems such as being not easy, by increasing the size of related inlet and outlet and being designed using end face seal, deficiency is effectively overcome.

Description

A kind of back washing filter system four-way valve

Technical field

A kind of back washing filter system four-way valve is the utility model is related to, it is mainly used in back washing filter system, and anti- Rush filtration system to be then used to remove solid impurity from liquid, or solid particle or drop are removed from gas, it is contemplated that word Custom, Wen Zhongyong " water " word represent fluid.

Background technology

Chinese invention patent ZL201110353118.9 describes back washing filter system four-way valve, solves flushing-back filtering The problem of system is in the past excessively complicated, but some shortcomings be present in it, such as the flow area of water inlet and water outlet diminishes during backwash, Influence backwash effect；It is equilateral triangle that and for example three of valve body, which radially import and export central point institute into triangle, influences valve and sets The flexibility of meter, when especially designing Integral back rinse-system.

The content of the invention

The utility model solves in the past same mainly solving the technical problems that providing a kind of back washing filter system four-way valve Flow area diminishes when class valve backwashes and valve body three radially imports and exports the problem of mutual alignment is single.

According to the utility model, the technical problem is solved by the theme of independent claims, preferred embodiment subordinate The theme of independent claims；Scheme is as follows：A kind of back washing filter system four-way valve, the back washing filter system (1) are main For going the removal of impurity from water body or gas, the four-way valve includes valve body (3) and central shaft one end is provided with the revolving body of valve rod Valve element (2), the other end of valve element (2) central shaft are provided with valve element inlet and outlet IV (16), three inlet and outlet are radially provided with it, respectively It is valve element inlet and outlet I (13), valve element inlet and outlet II (14) and valve element inlet and outlet III (15), valve element imports and exports IV (16) and valve element Import and export I (13) connections and form a runner, valve element inlet and outlet II (14) connects one stream of formation with valve element inlet and outlet III (15) Road, a water inlet, a blowdown, two runners do not connect mutually；Wrapping the valve body (3) of valve element (2) also has four inlet and outlet, its In three radially import and export, be respectively valve body inlet and outlet I (9), valve body inlet and outlet II (10) and valve body import and export III (11), most It is axial valve body inlet and outlet IV (12) afterwards, valve body inlet and outlet I (9) and valve body inlet and outlet III (11) are respectively used to connection two Filter element I (4) and II (7), valve body inlet and outlet II (10) and valve body inlet and outlet IV (12) are used to connect blowdown or water inlet, valve element Inlet and outlet IV (16) is connected with valve body inlet and outlet IV (12), when valve body inlet and outlet IV (12) is used to connect water inlet, valve element It is inlet channel that IV (16) and valve element inlet and outlet I (13) institutes, which are imported and exported, into runner, and valve element imports and exports II (14) and valve element inlet and outlet III (15) institute is sewage draining passage into runner, and valve body inlet and outlet I (9) and valve body inlet and outlet III (11) and valve element are imported and exported in I (13) extremely The rare one small person being more than among valve element inlet and outlet IV (16) and both A, A are that runner was most in the past by valve element inlet and outlet IV (16) Small area of section；When valve body inlet and outlet II (10) is used to connect water inlet, valve element inlet and outlet II (14) and valve element inlet and outlet III (15) connection institute be inlet channel into runner, and it is blowdown that valve element inlet and outlet IV (16) imports and exports I (13) and connected into runner with valve element Road, valve body inlet and outlet I (9), valve body inlet and outlet II (10), valve body inlet and outlet III (11), valve element inlet and outlet II (14) and valve element At least two small persons being more than among both valve body inlet and outlet II (10) and A in III (15) are imported and exported, A imports and exports for valve body The minimum area of section of II (10) runners in the past.

Rotational valve core (2), can make water inlet into one of filter element and sewage draining passage is obstructed, and the filter element is in Filtration state；Water purifying valve is closed, when valve element (2) goes to correct position, water inlet enters one of filter element, and arranges Another filter element is led in dirty road connection and sewage draining exit, system are in backwashing state.

In actual production, the hard sealing of cylinder, the conical surface or sphere etc. has certain difficulty of processing, production cost Height, and the effect of soft seal is unsatisfactory, plane hard seals effect is good, and cost does not include too high yet, therefore have sometimes must To use end face seal：One valve seat (20) of increase in valve body (3), both are fixed together, and valve seat (20) is axially having stream Road connection valve body inlet and outlet IV (12) and valve element inlet and outlet IV (16), valve seat have three end face inlet and outlet, respectively valve seat end face I (21), valve seat end face inlet and outlet II (23) and valve seat end face inlet and outlet III (25) are imported and exported, is radially passed in and out radially there are three Mouthful, it is that radially inlet and outlet I (22), valve seat radially import and export II (24) and valve seat radially inlet and outlet III (26), valve seat to valve seat respectively Radially inlet and outlet I (22) is connected with valve seat end face inlet and outlet I (21), and radially inlet and outlet II (24) is imported and exported valve seat with valve seat end face II (23) is connected, and radially inlet and outlet III (26) is connected valve seat with valve seat end face inlet and outlet III (25)；Valve seat radially imports and exports I (22), radially inlet and outlet III (26) imports and exports I (9), valve body with valve body successively respectively for valve seat radial direction inlet and outlet II (24) and valve seat Inlet and outlet II (10) connects with valve body inlet and outlet III (11)；Three inlet and outlet valve element inlet and outlet I (13), valve elements of valve element (2) enter Outlet II (14) and valve element inlet and outlet III (15) is arranged at end face, wherein valve element inlet and outlet I (13) and valve element inlet and outlet IV (16) connection forms a runner, and valve element inlet and outlet II (14) connects with valve element inlet and outlet III (15) forms a runner, one Water inlet, a blowdown, two runners do not connect mutually；When valve body inlet and outlet IV (12) is used to connect water inlet, valve element inlet and outlet I (13) it is inlet channel, valve element inlet and outlet II (14) and valve element inlet and outlet III (15) institute that runner is formed with valve element inlet and outlet IV (16) Into runner sewage draining passage, in valve seat end face inlet and outlet I (21) and valve seat end face inlet and outlet III (25) and valve element inlet and outlet I (13) At least one is more than the small person among both valve element inlet and outlet IV (16) and A, and A is that valve element imports and exports IV (16) runners in the past Minimum area of section；When valve body inlet and outlet II (10) is used to connect water inlet, valve element inlet and outlet II (14) and valve element inlet and outlet III (15) institute into runner be inlet channel, valve element inlet and outlet IV (16) and valve element inlet and outlet I (13) into runner be sewage draining passage, valve seat end Face inlet and outlet I (21), valve seat end face inlet and outlet II (23), valve seat end face inlet and outlet III (25), valve element inlet and outlet II (14) and valve At least two small persons being more than among both valve seat end face inlet and outlet II (23) and A in core inlet and outlet III (15), A is valve seat The minimum area of section of end face inlet and outlet II (23) runner in the past.

Four-way valve, two filter elements and related pipe fitting are integrated, can make whole back washing filter system can more concise beauty See.

Double the inlet and outlet flow area into filter element more, valve body can then use Y-shaped structure, and valve Core can make design relatively easy using equilateral triangle distribution.

When designing monoblock type back washing filter system, it is sometimes desirable to the inlet and outlet pipes' analysis into filter element is significantly increased Product, so become masterly when arranging the orientation angle of valve position in systems and inlet and outlet.

Above structure, it is allowed to two filter elements be respectively at filtering or backwashing state, in fact, for user and Speech, as long as two filtering bodies can be backwashed totally, only one filtering body of permission may be at filtration condition nothing be not yet Can, for example only allowing filtering body I (5) to be in filtration state, another filtering body II (8) may only provide water purification to realize Filtering body I (5) is backwashed, or backwashed by filtering body I (5) water purification provided, consequently, it is possible to which the structure of valve is just It can simplify.

Other key characters of the present utility model can be in the related of dependent claims, accompanying drawing and use accompanying drawing to advantage Found in explanation.

It is readily apparent that feature that is above-mentioned and will hereafter describing is in each case not only in specific combination Use, in other combinations or can also be used alone in the case where not departing from the utility model framework.

Preferred illustrative embodiment of the present utility model in the accompanying drawings with represented in detailed description of the invention, identical symbol represent Same or similar or function identical component.

Brief description of the drawings

In the accompanying drawings

It is water inlet that Fig. 1, which schematically shows that valve body imports and exports IV (12), the flushing-back filtering system that filtering body II (8) is backwashed System section.

It is water inlet that Fig. 2, which schematically shows that valve body imports and exports IV (12), the flushing-back filtering system that filtering body I (5) is backwashed System section.

It is water inlet that Fig. 3, which schematically shows that valve body imports and exports IV (12), and filtering body II (8) is in the flushing-back filtering of filtration condition System section.

It is water inlet that Fig. 4, which schematically shows that valve body imports and exports IV (12), and filtering body I (5) is in the flushing-back filtering of filtration condition System section.

It is water inlet that Fig. 5, which schematically shows that valve body imports and exports II (10), and filtering body II (8) is cut in the valve of filtration condition Face.

It is water inlet that Fig. 6, which schematically shows that valve body imports and exports II (10), the valve section that filtering body II (8) is backwashed.

It is water inlet that Fig. 7, which schematically shows that valve body imports and exports II (10), the valve section that filtering body I (5) is backwashed.

It is water inlet that Fig. 8, which schematically shows that valve body imports and exports II (10), and filtering body I (5) is in the valve section of filtration condition.

It is water inlet that Fig. 9, which schematically shows that valve body imports and exports IV (12), and filtering body II (8) is in the end face seal of filtration condition Valve section.

It is water inlet that Figure 10, which schematically shows that valve body imports and exports IV (12), the end face seal that filtering body II (8) is backwashed Valve section.

It is water inlet that Figure 11, which schematically shows that valve body imports and exports IV (12), and filtering body I (5) is in the end face seal of filtration condition Valve section.

It is water inlet that Figure 12, which schematically shows that valve body imports and exports IV (12), the end face seal valve that filtering body I (5) is backwashed Door section.

Figure 13 schematically shows the flushing-back filtering system for integrating end face seal four-way valve, two filter elements and related pipe fitting System part section.

Embodiment

According to Fig. 1, back washing filter system 1 includes four-way valve 3, filter element I 4, filter element II7 and connector 6, The filtering body I 5 and filtering body II8 for being adapted to backwash are respectively provided with filter element I4 and filter element II7, four-way valve 3 includes Valve body 3 and central shaft one end are provided with the revolving body valve element 2 of valve rod, and the other end of the central shaft of valve element 2 is provided with valve element inlet and outlet IV16, Three inlet and outlet are radially provided with it, are that valve element inlet and outlet I 13, valve element inlet and outlet II 14 and valve element import and export III15 respectively, Valve element imports and exports IV16 and connects one runner of formation with valve element inlet and outlet I 13, and valve element inlet and outlet II 14 imports and exports with valve element III15 connects to form a runner, and two runners do not connect mutually；Wrapping the valve body 3 of valve element 2 also has four inlet and outlet, wherein Three are radially imported and exported, and are valve body inlet and outlet I 9, valve body inlet and outlet II 10 and valve body inlet and outlet III11 respectively, are finally axles To valve body import and export IV12, valve body inlet and outlet I 9 and valve body inlet and outlet III11 connect two Hes of filter element I 4 respectively II7, valve body inlet and outlet II 10 are used to connect blowdown, and valve body inlet and outlet IV12, which is used to connect, intakes, valve element inlet and outlet IV16 and valve Body inlet and outlet IV12 is connected；Valve body is imported and exported at least one in I 9 and valve body inlet and outlet III11 and valve element inlet and outlet I 13 Small person among individual both IV16 and A more than valve element inlet and outlet, A is the minimum cross section that valve element imports and exports runner before IV16 Product.

Valve body imports and exports I 9 and valve body inlet and outlet III11 ratios valve body inlet and outlet II 10 and valve body inlet and outlet IV12 is twice It is more.

Valve element inlet and outlet I 13, valve element inlet and outlet II 14 and valve element inlet and outlet III15 central point institute are into triangle for just Triangle.

Valve body imports and exports I 9, valve body imports and exports II 10 and valve body inlet and outlet III11 central point institute is into triangle etc. Lumbar triangle shape.

Filter element I 4, filter element II7 import and export I 9 with valve body respectively and valve body inlet and outlet III11 is connected, and connect Part 6 connects filter element I 17, filter element II18 and passes through filtered water outlet 19, by being connected with valve at filtered water outlet 19 Door (not shown)

When valve element 2 goes to shown position, close by connecting valve (not shown) at filtered water outlet 19, water is along disengaging Mouth 12,16,13,9,5,17,18,8,11,15,14,10 is flowed, and impurity is discharged from valve body inlet and outlet II10, filtering body II8 quilts Backwash.

According to Fig. 2, when valve element 2 goes to shown position, close by connecting valve (not shown) at filtered water outlet 19, water Along the flowing of inlet and outlet 12,16,13,11,8,18,17,5,9,14,15,10, impurity is discharged from valve body inlet and outlet II 10, mistake Filter body I 5 is backwashed.

According to Fig. 3, when valve element goes to shown position, sewage draining passage is plugged, water can only along inlet and outlet 12,16,13, 11st, 8,18,19 flowing, filtering body II8 are in filtration condition.

According to Fig. 4, when valve element goes to shown position, sewage draining passage is plugged, water can only along inlet and outlet 12,16,13,9, 5th, 17,19 flowing, filtering body I 5 are in filtration condition.

According to Fig. 5, when valve body inlet and outlet II 10 is as water inlet, valve body inlet and outlet IV12 is exactly sewage draining exit, and valve element enters Export II 14 and valve element inlet and outlet III15 institutes into runner be inlet channel, valve element inlet and outlet IV16 and valve element inlet and outlet I 13 into Runner is sewage draining passage, same Fig. 4 of connection with filter element etc., only shows valve section here.

It is both the water inlet of inlet channel that valve element, which imports and exports II 14 and valve element inlet and outlet III15, is the water outlet of inlet channel again Mouthful, it is ensured that still there are enough flows in switching, while it is feasible method to increase two inlet and outlet, as illustrated, valve element It is all big more than valve body inlet and outlet II 10 to import and export II 14 and valve element inlet and outlet III15.

It is 113.2 ° that valve body, which imports and exports I 9 with valve body inlet and outlet III11 angulations, valve body inlet and outlet I 9, valve body disengaging At least two are more than valve in mouth II 10, valve body inlet and outlet III11, valve element inlet and outlet II 14 and valve element inlet and outlet III15 Small person among both body inlet and outlet II 10 and A, A is the minimum area of section that valve body imports and exports runner before II 10, is just had It can guarantee that two filtering bodies can be in filtration condition, and can is in by recoil state, and has enough flows.

When valve element 2 goes to shown position, sewage draining passage is plugged, and water can only be along inlet and outlet 10,14,15,11,8,18,19 Flowing, filtering body II 8 are in filtration condition.

According to Fig. 6, when valve element 2 goes to shown position, water along inlet and outlet 10,15,14,9,5,17,18,8,11,13, 16th, 12 flowing, filtering body II8 are in and are backwashed state.

According to Fig. 7, when valve element 2 goes to shown position, water along inlet and outlet 10,14,15,11,8,18,17,5,9,13, 16th, 12 flowing, filtering body I 5 are in and are backwashed state.

According to Fig. 8, when valve element 2 goes to shown position, blowdown runner is plugged, water can only along inlet and outlet 10,14,15, 9th, 5,17,19 flowing, filtering body I 5 are in filtration condition.

According to Fig. 9, when using end face seal structure for four-way valve valve element 2 slightly above sealing surface section, in valve body 3 (not shown) increases the valve seat 20 with the cooperating of valve element 2, and the (not shown) of valve body 3 is closely fixed together with valve seat 20, valve Seat 20 is axially having flow passage valve body inlet and outlet IV12 and valve element inlet and outlet IV16, and valve seat has three end face inlet and outlet, respectively I 21, valve seat end face inlet and outlet II23 and valve seat end face are imported and exported for valve seat end face and imports and exports III25, radially there are three radial directions Inlet and outlet, it is that radially inlet and outlet I 22, valve seat radially import and export II24 and valve seat radially inlet and outlet III26, valve seat to valve seat respectively Radially inlet and outlet I 22 connects with valve seat end face inlet and outlet I 21, and valve seat radially imports and exports II24 and valve seat end face inlet and outlet II23 Connection, radially inlet and outlet III26 is connected valve seat with valve seat end face inlet and outlet III25；Valve seat radially imports and exports I 22, valve seat radially Importing and exporting II 24 and valve seat, radially inlet and outlet III26 imports and exports the (not shown) of I 9, valve body inlet and outlet II with valve body successively respectively 10 (not shown) connect with valve body inlet and outlet III11 (not shown).

Three of valve element 2 inlet and outlet valve elements inlet and outlet I 13, valve element inlet and outlet II 14 and valve element inlet and outlet III15 all by End face is arranged at, wherein valve element inlet and outlet I 13 connects to form inlet channel with valve element inlet and outlet IV16, the valve element inlet and outlet Hes of II 14 Valve element inlet and outlet III15 connects to form sewage draining passage, and twice do not connect mutually, and the valve body inlet and outlet IV12 being connected with inlet channel is water inlet Mouthful, the valve body inlet and outlet (not shown) of II 10 being connected with sewage draining passage is sewage draining exit；Import and export I 21 and valve seat end face in valve seat end face The small person that at least one in III25 and valve element inlet and outlet I 13 is more than among valve element inlet and outlet both IV16 and A is imported and exported, A is the minimum area of section that valve element imports and exports runner before IV16.

Valve seat end face inlet and outlet I 21 and valve seat end face inlet and outlet III25 is bigger than valve seat end face inlet and outlet II23, in entirety In formula back washing filter system, such design make it that the arrangement to spool position and each inlet and outlet direction is more flexible, more preferably Satisfaction be actually needed, such as in figure valve seat 20 radially import and export I 22, valve seat end face inlet and outlet I 21, valve seat radially import and export IIII26 and valve seat end face inlet and outlet III25 lower edge are all flat, and this design can smooth out blowdown runner during backwash, And can causes spool position to move up as far as possible, closer to two filter elements, so that whole system is more compact.

Both advantageous and disadvantageous, wash away increase of the dampening to sealing surface is meaned in the increase of valve seat end face inlet and outlet, close so as to reduce The service life of front cover, therefore to be considered during design.

Shown valve element inlet and outlet I 13 is connected with valve seat end face inlet and outlet III25, and blowdown runner is plugged, and system is in Filtration condition.

According to Figure 10, valve element is imported and exported I 13 and connected with valve seat end face inlet and outlet I 21, and blowdown runner is unimpeded, at system In backwashing state.

According to Figure 11, valve element is imported and exported I 13 and connected with valve seat end face inlet and outlet I 21, and blowdown runner is plugged, system In filtration condition.

According to Figure 12, valve element is imported and exported I 13 and connected with valve seat end face inlet and outlet III25, and blowdown runner is unimpeded, system In backwashing state.

From carrying out simple inference above, valve body can equally be imported and exported using the four-way valve of end face seal by II 10 As water inlet, valve body inlet and outlet IV12 is sewage draining exit, and II23, valve seat are imported and exported in valve seat end face inlet and outlet I 21, valve seat end face End face inlet and outlet III25, valve element inlet and outlet II14 and valve element inlet and outlet III15 at least two be more than valve seat end face import and export Small person among both II23 and A, A are the minimum area of section that runner before II 23 is imported and exported in valve seat end face.

According to Figure 13, end face seal four-way valve, two filter elements and related pipe fitting are integrated together, and are formed overall The back washing filter system of formula, system architecture become more compact, and its operation principle is with split type, any one filter element Can be in filtering or the state being backwashed.

Above structure, it is allowed to two filtering bodies be respectively at filtering or backwashing state, in fact, for user and Speech, as long as two filtering bodies can be backwashed totally, only allow a filtering body may be at filtration condition also can, such as There is filtering body I 5 to be allowed to be in filtration state, another filtering body II 8 may only provide water purification to realize to filtering Body I 5 is backwashed, or is backwashed by the water purification provided of filtering body I 5, consequently, it is possible to which the structure of valve can simplify.

Manual handle can be installed on valve rod, it is automatic to realize to install YE or other actuators Backwash；Differential pressure pickup can also be installed between water purification after raw water and filtering with timing automatic backwash, when pressure difference passes When the numerical value of sensor reaches setting value, signal is sent to actuator, actuator performs backwash, filtering back to normal after rinsing Working condition.

Claims

1. a kind of back washing filter system four-way valve, the back washing filter system (1) is mainly used in removing from liquid or gas Impurity, the four-way valve includes valve body (3) and central shaft one end is provided with the revolving body valve element (2) of valve rod, valve element (2) central shaft The other end is provided with valve element inlet and outlet IV (16), and three inlet and outlet are radially provided with it, is valve element inlet and outlet I (13), valve element respectively II (14) and valve element inlet and outlet III (15) are imported and exported, valve element inlet and outlet IV (16) connects formation one with valve element inlet and outlet I (13) Runner, valve element inlet and outlet II (14) are connected with valve element inlet and outlet III (15) and are formed a runner, and two runners do not connect mutually；Bag Wrapping the valve body (3) of valve element (2) also has four inlet and outlet, wherein three are radially imported and exported, it is valve body inlet and outlet I (9), valve respectively Body inlet and outlet II (10) and valve body inlet and outlet III (11), also an axial valve body inlet and outlet IV (12), two of valve body (3) Valve body inlet and outlet I (9) and valve body inlet and outlet III (11) is used to connect two filter element I (4) and II (7) respectively, and remaining two Individual valve body inlet and outlet II (10) and valve body inlet and outlet IV (12) connect blowdown or water inlet, valve element inlet and outlet IV (16) and valve body respectively Inlet and outlet IV (12) is connected；When valve body inlet and outlet IV (12) is used to connect water inlet, valve element inlet and outlet IV (16) enters with valve element It is inlet channel that I (13) connections institute, which is exported, into runner, and valve element inlet and outlet II (14) connects institute with valve element inlet and outlet III (15) into runner Sewage draining passage, now at least one in valve body inlet and outlet I (9) and valve body inlet and outlet III (11) and valve element inlet and outlet I (13) is big Small person among valve element inlet and outlet IV (16) and both A, A are the minimum cross section of valve element inlet and outlet IV (16) runners in the past Product；When valve body inlet and outlet II (10) is used to connect water inlet, valve element inlet and outlet II (14) connects institute with valve element inlet and outlet III (15) Into runner inlet channel, it is sewage draining passage that valve element inlet and outlet IV (16), which connects institute with valve element inlet and outlet I (13) into runner, and now valve body enters Export I (9), valve body inlet and outlet II (10), valve body inlet and outlet III (11), valve element inlet and outlet II (14) and valve element inlet and outlet III (15) at least two small persons being more than among both valve body inlet and outlet II (10) and A in, A are that valve body imported and exported II (10) in the past The minimum area of section of runner.

A kind of 2. back washing filter system four-way valve as claimed in claim 1, it is characterised in that the increase by one in valve body (3) Valve seat (20), both are fixed together, and valve seat (20) is axially having flow passage valve body inlet and outlet IV (12) to be imported and exported with valve element IV (16), valve seat (20) have three end face inlet and outlet, respectively valve seat end face inlet and outlet I (21), valve seat end face inlet and outlet II (23) and valve seat end face inlet and outlet III (25), radially having three radially import and export, be respectively valve seat radially inlet and outlet I (22), Radially radially inlet and outlet III (26), valve seat radial direction inlet and outlet I (22) are passed in and out valve seat with valve seat end face for inlet and outlet II (24) and valve seat Mouth I (21) connections, radially inlet and outlet II (24) is connected valve seat with valve seat end face inlet and outlet II (23), valve seat radial direction inlet and outlet III (26) connected with valve seat end face inlet and outlet III (25)；Radially inlet and outlet I (22), valve seat radially import and export II (24) and valve to valve seat Radially inlet and outlet III (26) imports and exports I (9), valve body inlet and outlet II (10) and valve body inlet and outlet III to seat with valve body successively respectively (11) ne-leakage connects, and two valve bodies inlet and outlet I (9) and valve body the inlet and outlet III (11) of valve body (3) connect two filterings respectively Unit I (4) and II (7), remaining two valve bodies inlet and outlet II (10) and valve body inlet and outlet IV (12) connect blowdown or entered respectively Water；Three of valve element (2) inlet and outlet valve elements inlet and outlet I (13), valve element inlet and outlet II (14) and valve element import and export III (15) all by End face is arranged at, wherein valve element inlet and outlet I (13) connects with valve element inlet and outlet IV (16) forms a runner, valve element inlet and outlet II (14) connect to form another runner with valve element inlet and outlet III (15), two runners do not connect mutually；As valve body inlet and outlet IV (12) When being intake for connection, it is inlet channel that valve element inlet and outlet IV (16), which connects institute with valve element inlet and outlet I (13) into runner, and valve element passes in and out It is sewage draining passage that mouth II (14), which connects institute with valve element inlet and outlet III (15) into runner, and now I (21) and valve seat are imported and exported in valve seat end face At least one in end face inlet and outlet III (25) and valve element inlet and outlet I (13) be more than both valve element inlet and outlet IV (16) and A it In small person, A is the minimum area of section that valve element imports and exports IV (16) runner in the past；When valve body inlet and outlet II (10) is used to connect During water inlet, it is inlet channel that valve element inlet and outlet II (14), which connects institute with valve element inlet and outlet III (15) into runner, and valve element imports and exports IV (16) it to be connected by sewage draining passage with valve element inlet and outlet I (13) into runner, and now valve seat end face inlet and outlet I (21), valve seat end face are entered Export in II (23), valve seat end face inlet and outlet III (25), valve element inlet and outlet II (14) and valve element inlet and outlet III (15) at least Two small persons being more than among both valve seat end face inlet and outlet II (23) and A, A are that II (23) runners in the past are imported and exported in valve seat end face Minimum area of section.

3. a kind of back washing filter system four-way valve as claimed in claim 1, it is characterised in that valve body (3), valve element (2), mistake Filter unit I (4) and filter element II (7) and connector (6) may be integrally incorporated to together.

4. a kind of back washing filter system four-way valve as claimed in claim 2, it is characterised in that valve body (3), valve element (2), valve Seat (20), filter element I (4) and filter element II (7) and connector (6) may be integrally incorporated to together.

A kind of 5. back washing filter system four-way valve as any one of Claims 1-4, it is characterised in that filtering body I (5) and in filtering body II (8) a filtering body I (5) is allowed to be in filtration state, another filtering body II (8) Water purification may only be provided filtering body I (5) is backwashed with realizing, or backwashed by filtering body I (5) water purification provided.

A kind of 6. back washing filter system four-way valve as claimed in claim 4, it is characterised in that valve seat end face inlet and outlet I (21) With valve seat end face inlet and outlet III (25) than valve seat end face inlet and outlet II (23) greatly, valve seat radially imports and exports I (22) and valve seat end face It is all flat to import and export I (21) and the valve seat lower edge that radially inlet and outlet III (26) imports and exports III (25) with valve seat end face.

A kind of 7. back washing filter system four-way valve as described in claim 1 or 3, it is characterised in that valve body inlet and outlet I (9) and Valve body inlet and outlet III (11) imports and exports IV (12) and is twice more than valve body inlet and outlet II (10) with valve body, and three radial direction valve elements enter Export I (13), valve element inlet and outlet II (14) and valve element inlet and outlet III (15) central point into triangle be equilateral triangle, three Individual valve body inlet and outlet I (9), valve body inlet and outlet II (10) and valve body inlet and outlet III (11) central point into triangle be isosceles Triangle.

8. a kind of back washing filter system four-way valve as any one of Claims 1-4, it is characterised in that connect on valve rod Connecting handle, YE or other actuators.

9. a kind of back washing filter system four-way valve as any one of Claims 1-4, it is characterised in that enter in valve body Outlet IV (12) be before water inlet and pure water inlet (19) after pressure difference switch is installed, actuator, actuator are connected on valve rod The signal that pressure difference switch transmits when pressure difference is higher than setting value can be received, then backwash is performed automatically, reply after rinsing Normal operating conditions.