CN104948787A

CN104948787A - Multifunctional valve

Info

Publication number: CN104948787A
Application number: CN201510366861.6A
Authority: CN
Inventors: 阮万生
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-06-26
Filing date: 2015-06-26
Publication date: 2015-09-30
Anticipated expiration: 2035-06-26
Also published as: CN104948787B

Abstract

The invention belongs to the technical field of machinery, and provides a multifunctional valve which solves the problems that an existing multifunctional combination valve is high in cost and not convenient to operate. The multifunctional valve comprises a valve body with the two ends being a water inlet end and a water outlet end respectively, a filter pipe is arranged on the outer side of the valve body, a filter screen is arranged in the filter pipe, and a pressing cap is connected to the outer end of the filter pipe in a threaded mode. A first mounting pipe and a second mounting pipe are further arranged on the outer side of the valve body, and the first mounting pipe and the filter pipe share the same axis. A first water hole is formed in the valve body and located between the filter pipe and the first mounting pipe, and a second water hole is formed in the valve body and located between the filter pipe and the second mounting pipe. A first plug and a first spring are arranged in the first mounting pipe. The inner side of the pressing cap is connected with an ejector rod which penetrates out of the filter pipe and abuts against the first plug. A second plug and a second spring are arranged in the second mounting pipe. The multifunctional valve has the advantages of being low in cost, convenient to use, not prone to leakage and the like.

Description

A kind of multifunction valve

Technical field

The invention belongs to field of mechanical technique, relate to a kind of multifunction valve.

Background technique

Filter tap carries out filtering pretreated device; also be the indispensable a kind of device of tubing of fed sheet of a media; it is often installed on hydraulic control valve, reduction valve, Decompression valves, determines the entrance point of the equipment such as water valve; be used for eliminating the impurity in medium; prevent graininess impurity inlet passage; result in blockage, with the accessory on proterctive equipment pipeline from wearing and tearing and blocking.Filter tap is widely used in industrial production and daily life, and existing filter tap comprises the elements such as valve body, valve gap, filtration core, and valve body generally comprises the inner chamber of import and outlet and one for placing the arm of filtration core.

Existing filter tap is when being applied on system pipeline, general needs are respectively connected other valves such as throttle valve or stop valve with waterexit end by joint at the feed-water end of screen pipe, its objective is in order to when dismantling the filter screen of filter tap, can be closed by the turnover two ends of valve to filter tap being connected to filter tap turnover two ends, like this when dismantling the filter screen in filter tap, current just understand flow into filter tap in feed-water end from filter tap or the waterexit end from filter tap arm in and to external leakage.

But, a set of like this by each independently combined valve of getting up of valve combination, there are some problems: one, each valve is separate, can only be connected by joint with pipe fitting, so easily causes the length of whole combined valve longer, volume is comparatively large, is not suitable for like this installing; Secondly, because constituent elements is more, cause the cost that is assembled into needed for such combined valve higher, and the many faults that just easily appearance is more of constituent elements, not easy-maintaining, in addition, cause tie point more owing to adopting multiple valve combination to connect, namely mean that medium is more to the leak source of external leakage, if medium is the chemical industry materials such as oil, leaking also can to the environment of surrounding except making the wasting of resources; In addition, before dismounting and cleaned filter screen, need first to be closed at filter tap two ends, clean complete at filter screen and reinstall to after in filter tap, more manually again being opened at the two ends of filter tap, it is very inconvenient that such mode makes user operation get up.

Summary of the invention

The object of the invention is the problems referred to above existed for prior art, propose a kind of, cost of production more simple in structure and user cost is lower, the multifunction valve of more environmental protection.

Object of the present invention realizes by following technical proposal:

A kind of multifunction valve, comprise the valve body that two ends are respectively feed-water end and waterexit end, have outside described valve body and tilt and the screen pipe communicated with body cavity relative to valve body, filter screen is provided with in described screen pipe, described screen pipe outer end has been threaded pressure cap, it is characterized in that, also there is outside described valve body the mounting pipe one relative to valve body inclination and mounting pipe two, described mounting pipe one has identical axis with screen pipe, between screen pipe and mounting pipe one, form water passage hole one in described valve body respectively and form water passage hole two between screen pipe and mounting pipe two, plug one and spring one is provided with in described mounting pipe one, be connected with push rod inside described pressure cap and pass in push rod inherent filtration pipe and lean on plug one, described plug one has the trend leaned on water passage hole one lower end surface under the elastic force effect of spring one, plug two and spring two is provided with in described mounting pipe two, described plug two leans on the lower end surface of water passage hole two under the elastic force effect of spring two.

This multifunction valve can be applicable to the flowing mediums such as water, gas, oil, during application, flowing medium enters from the feed-water end of valve body and enters in screen pipe through water hole one, after chimney filter filters, arrive the upper end surface to water passage hole two, then by the pressure effect of flowing medium, make plug two overcome the elastic force effect of spring two and be opened by water passage hole two, flowing medium is finally entered into the waterexit end of valve body by water passage hole two.When needing dismounting and cleaned filter screen, only need outside turn pressure cap, being connected to push rod inside pressure cap along with pressure cap together outwards moves until be removed, push rod and plug one depart from completely, now plug one leans and on water passage hole one, water passage hole one is closed under the elastic force effect of spring one, and the flowing medium at feed-water end place can not enter in screen pipe.Simultaneously, lose the pressure effect of flowing medium, water passage hole two is closed again by plug two under the elastic force effect of spring two, like this because water passage hole one and water passage hole two are all closed, cut off completely between feed-water end and waterexit end, namely achieve the automatic closedown at valve body turnover two ends when dismounting and cleaned filter screen, simultaneously when dismounting and cleaned filter screen, valve inleting water end and going out of waterexit end place can not leak from screen pipe.

In addition, except normal filtering function, control moving in or out of push rod by screwing in or screw out pressure cap, this multifunction valve can also realize the function such as throttling or cut-off.When push rod inwardly or outwards mobile make plug one away from or near water passage hole for the moment, namely by controlling the gap length between plug one and water passage hole one, realize throttling function.And when push rod outwards move to be separated completely with plug one time, by the elastic force effect of spring one, plug one is leaned on water passage hole one water passage hole one is completely closed, now achieves cutoff function again.Throttling, cut-off or when removing filter screen, the import and export of self acting stop valve body are all only realized by push rod, plug one and spring one, therefore this valve optimizes the internal structure of valve well realizing multi-functional while, save the use of a large amount of constituent elements, greatly reduce the cost of production of product.In addition, the several functions of this multifunction valve all occurs in same valve body, use compared to traditional multiple valve combination, this multifunction valve saves the multiple tie points produced when multiple valve connects, and due to the minimizing of tie point, thus also just avoid flowing medium and outwards leak at tie point place, especially when medium is oil, oil can be avoided especially to external leakage to environment.

In above-mentioned multifunction valve, described screen pipe outer end madial wall is provided with O type circle, described pressure cap the inner comprises the section of being threaded for being connected with screen pipe end and seal section, the length of the described section of being threaded is greater than the length of seal section, and the inner edge of described O type circle reclines mutually with the outside of the seal section of pressure cap the inner.

The inner edge of O type circle reclines mutually with the outside of the seal section of pressure cap the inner thus is formed and seals, length due to the section of being threaded of pressure cap the inner is greater than the length of seal section, even if therefore when pressure cap is subject to the punching press of flowing medium and causes pressure cap part outwards to move, still reaching the multi-functional sealability ensured between pressure cap and screen pipe simultaneously, the leakage causing flowing medium can be avoided.

In above-mentioned multifunction valve, the length of the section of being threaded of described pressure cap the inner is greater than push rod and inwardly pushes up the maximum value of pressing plug for the moment spring one to be compressed.

When realizing cutoff function, outside turn pressure cap, pressure cap drives push rod to be moved upward to push rod and plug one is separated from each other, plug one leans on the lower end surface of water passage hole one under the elastic force effect of spring one, and inwardly push up because the length of the section of being threaded of pressure cap the inner is greater than push rod the maximum value that pressure plug makes spring one compress for the moment, therefore now the section of being threaded of pressure cap the inner is still partly threaded with screen pipe, can not depart from, namely ensure that the normal realization of cutoff function from screen pipe.

In above-mentioned multifunction valve, described pressure cap inside bottom center has protruding positioning part, and one end of described push rod is fixed in positioning part, and the other end top of described push rod is pressed on plug one.

Push rod one end is fixed in the positioning part inside pressure cap, and the other end of push rod leans on plug, and because pressure cap is threaded with screen pipe, so in the process screwing in or screw out pressure cap, push rod inside or outside movement can axially occur.Can inside top pressure plug one when push rod moves inward, make plug one overcome spring one elastic force effect and away from water passage hole one; And when push rod outwards moves, push rod and plug one are separated from each other, so plug leans on the lower end surface of water passage hole one and is closed by water passage hole one under the elastic force effect at spring one.This Placement of push rod and pressure cap, can make well this valve by means of only push rod and plug once and spring one between coordinate and can realize the function such as throttling, cut-off.

In above-mentioned multifunction valve, described valve body and screen pipe are integral type structure, the upper-end surface of described water passage hole one has positioning step protruding ringwise, the inner of described filter screen is enclosed within positioning step, and the outer end of described filter screen is resisted against the inner side of pressure cap.

Directly screen pipe and valve body are processed as one, when loading filter screen, the inner of filter screen is positioned by the positioning step on water passage hole one upper-end surface, the outer end of filter screen then when pressure cap is connected on screen pipe and the inner side of pressure cap lean, in this case, can not there is axial play in filter screen, simultaneously in screen pipe, when removing filter screen, without the need to removing screen pipe.

In above-mentioned multifunction valve, described valve body and mounting pipe one are integral type structure, described mounting pipe one tilts from the feed-water end of valve body lateral valve body, and the end thread of described mounting pipe one is connected with blocking cap one, and the two ends of described spring one lean respectively on plug one and blocking cap one.

Directly mounting pipe one and valve body are made of one formula structure, then blocking cap one on mounting pipe one end is threaded, adopt and can install valve body easily in this way, realize valve multi-functional while, the internal structure of valve body can be simplified again, make the overall structure of valve simpler.

In above-mentioned multifunction valve, the inner of described plug one has the directional post one of protrusion, center inside described blocking cap one has the guide portion one of protrusion, described directional post one inserts in guide portion one, described spring one is enclosed within outside guide portion one, and the inner of the directional post one described in when leaning on the lower end surface of water passage hole one under the elastic force effect of plug one at spring one is positioned at guide portion one.

The directional post one of plug one the inner is inserted in the guide portion one inside blocking cap one, plug one near or away from the process of water passage hole one in directional post move along guide portion one for a moment, so can ensure that plug one faces with water passage hole one all the time by directional post one with coordinating of guide portion one, in addition, when leaning on the lower end surface of water passage hole one under the elastic force effect of plug one at spring one, the inner of directional post one is still positioned at guide portion one, namely represent that the length of directional post one should be greater than the maximum moving distance of plug one, can ensure that directional post one is positioned at guide portion one all the time like this, also just ensure that the position of plug one can not be departed from all the time.

In above-mentioned multifunction valve, described valve body and mounting pipe two are integral type structure, described mounting pipe two tilts from the waterexit end of valve body lateral valve body, and the end thread of described mounting pipe two is connected with blocking cap two, and the two ends of described spring two lean respectively on plug two and blocking cap two.

Directly mounting pipe two and valve body are made of one formula structure, then blocking cap two on the end of mounting pipe two connects respectively, adopt and can install valve body easily in this way, while realizing multi-functional valve, the internal structure of valve body can be simplified again, make the overall structure of valve simpler.

In above-mentioned multifunction valve, the inner of described plug two has the directional post two of protrusion, center inside described blocking cap two has the guide portion two of protrusion, described directional post two inserts in guide portion two, described spring two is enclosed within outside guide portion two, and the inner of the directional post two described in when leaning on the lower end surface of water passage hole two under the elastic force effect of plug two at spring two is positioned at guide portion two.

The directional post two of plug two the inner is inserted in the guide portion two inside blocking cap two, plug two near or away from the process of water passage hole two in directional post two can move along guide portion two, so can ensure that plug two faces with water passage hole two all the time by directional post two with coordinating of guide portion two, in addition, when leaning on the lower end surface of water passage hole two under the elastic force effect of plug two at spring two, the inner of directional post two is still positioned at guide portion two, namely represent that the length of directional post two should be greater than the maximum moving distance of plug two, can ensure that directional post two is positioned at guide portion two all the time like this, also just ensure that the position of plug two can not be departed from all the time.

A kind of multifunction valve, comprise the valve body that two ends are respectively feed-water end and waterexit end, have outside described valve body and tilt and the screen pipe communicated with body cavity relative to valve body, filter screen is provided with in described screen pipe, described screen pipe outer end has been threaded pressure cap, it is characterized in that, also there is outside described valve body the mounting pipe one relative to valve body inclination and mounting pipe two, described mounting pipe one has identical axis with screen pipe, between screen pipe and mounting pipe one, form water passage hole one in described valve body respectively and form water passage hole two between screen pipe and mounting pipe two, plug one and spring one is provided with in described mounting pipe one, described plug one is fixed with push rod and the outer end of push rod to be stretched in screen pipe and leaned inside pressure cap, described plug one has the trend leaned on water passage hole one lower end surface under the elastic force effect of spring one, plug two and spring two is provided with in described mounting pipe two, described plug two leans on the lower end surface of water passage hole two under the elastic force effect of spring two.

Under normal condition, push rod is connected on plug one, plug one has the trend leaned on water passage hole one under the elastic force effect of spring one, the outer end of push rod then extend in screen pipe, when pressure cap is threaded onto on screen pipe, can lean with the outer end of push rod inside pressure cap, along with the continuous screw-in of pressure cap, constantly push rod is inwardly pushed up inside pressure cap pressure also just make simultaneously plug one overcome spring one elastic force effect and away from water passage hole one.When needing dismounting and cleaned filter screen, only pressure cap outwards need be screwed out, pressure cap and push rod outer end are separated from each other, namely the outer end of the bar that bears down on one no longer inwardly is pushed up inside pressure cap, so plug one can lean on water passage hole one and be closed by water passage hole one under the elastic force effect of spring one, the flowing medium being now positioned at feed-water end place just cannot enter into screen pipe, and lose the pressure effect of flowing medium, water passage hole two again can be closed by plug two under the elastic force effect of spring two, like this because water passage hole one and water passage hole two are all closed, cut off completely between feed-water end and waterexit end, namely the automatic closedown at valve body turnover two ends when dismounting and cleaned filter screen is achieved, simultaneously when dismounting and cleaned filter screen, the flowing medium at valve inleting water end and waterexit end place can not leak from screen pipe.

Compared with prior art, this multifunction valve is by means of only functions such as self acting stop valve body turnover two ends, throttling and cut-offs when the cooperation realization dismounting between push rod, plug one, spring one, plug two and spring two and cleaned filter screen, realizing multi-functional while, optimize the internal structure of valve body, make the total of valve simpler, compact, small and exquisite, simultaneously owing to saving the constituent elements realized in a large number needed for said function, therefore, it is possible to reduce cost of production and user cost widely, in addition, when dismounting and cleaned filter screen, because the effect of plug one and plug two makes the in-out end of valve body be automatically switched off, water in valve inleting water end and waterexit end can not enter in screen pipe, so also protect the leakage of water well, reduce the pollution to environment, this multifunction valve saves the multiple tie points produced when multiple valve connects simultaneously, and due to the minimizing of tie point, thus also just avoid flowing medium and outwards leak at tie point place, especially when medium is oil, oil can be avoided especially to external leakage to environment.

Accompanying drawing explanation

Fig. 1 is the sectional view of this multifunction valve.

Fig. 2 is the sectional view at pressure cap place in this multifunction valve.

Fig. 3 is that this multifunction valve is inner without sectional view when spring one and spring two.

In figure, 1, valve body; 1a, feed-water end; 1b, waterexit end; 2, screen pipe; 3, filter screen; 4, pressure cap; 4a, the section of being threaded; 4b, seal section; 4c, positioning part; 5, mounting pipe one; 6, mounting pipe two; 7, water passage hole one; 7a, positioning step; 8, water passage hole two; 9, plug one; 9a, directional post one; 10, spring one; 11, push rod; 12, plug two; 12a, directional post two; 13, spring two; 14, O type circle; 15, blocking cap one; 15a, guide portion one; 16, blocking cap two; 16a, guide portion two.

Embodiment

Be below specific embodiments of the invention and by reference to the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.

Embodiment one

As shown in Figure 1, a kind of multifunction valve, comprise in a tubular form and the inner valve body 1 for cavity, valve body 1 two ends are respectively feed-water end 1a and waterexit end 1b, have outside valve body 1 and to tilt relative to valve body 1 and the screen pipe 2 communicated with valve body 1 inner chamber, the mounting pipe 1 tilted to the feed-water end 1a of valve body 1 and the mounting pipe 26 tilted to the waterexit end 1b of valve body 1, mounting pipe 1 has identical axis with screen pipe 2, and mounting pipe 1, mounting pipe 26, screen pipe 2 and valve body 1 is integral type structure.

As shown in Figure 1, Figure 2 and Figure 3, filter screen 3 is provided with in screen pipe 2, screen pipe 2 outer end has been threaded pressure cap 4, the feed-water end 1a of water passage hole 1 water passage hole 1 near valve body 1 is formed between the inherent screen pipe 2 of valve body 1 and mounting pipe 1, the upper-end surface of water passage hole 1 has positioning step 7a protruding ringwise, the inner of filter screen 3 is enclosed within the outside of positioning step, and the outer end of filter screen 3 is resisted against the inner side of pressure cap 4.Be provided with plug 1 and spring 1 in mounting pipe 1, the end thread of mounting pipe 1 is connected with blocking cap 1, and the two ends of spring 1 lean respectively on plug 1 and blocking cap 1.Be connected with push rod 11 inside pressure cap 4, pressure cap 4 inside bottom center has protruding positioning part 4c, and one end of push rod 11 is fixed in the 4c of positioning part, and the other end top of push rod 11 is pressed on plug 1.The inner of plug 1 has directional post one 9a, center inside blocking cap 1 has guide portion one 15a of protrusion, directional post one 9a is inserted in guide portion one 15a, spring 1 is enclosed within outside guide portion one 15a, the length of directional post one 9a is greater than the displacement distance of plug 1, and the inner of directional post one 9a is positioned at guide portion one 15a when on the lower end surface that plug 1 is resisted against water passage hole 1.

As depicted in figs. 1 and 2, the outer end madial wall of screen pipe 2 is provided with O type circle 14, pressure cap 4 the inner comprises the section of being threaded 4a and seal section 4b, pressure cap 4 the inner is positioned at screen pipe 2 and the section of being threaded connection 4a is connected with screen pipe 2, the inner edge of O type circle 14 reclines mutually with the outside of the seal section 4b of pressure cap 4 the inner, the length of the section of being threaded 4a is greater than the length of seal section 4b, and the length of the section of being threaded 4a is then greater than push rod 11 and inwardly presses maximum value when plug 1, spring 1 being compressed in top.

As shown in figures 1 and 3, water passage hole 28 is formed between the inherent screen pipe 2 of valve body 1 and mounting pipe 26, water passage hole 28 is near the waterexit end 1b of valve body 1, mounting pipe 26 end thread is connected with blocking cap 2 16, be provided with plug 2 12 and spring 2 13 in mounting pipe 26, the two ends of spring 2 13 lean respectively on plug 2 12 and blocking cap 2 16.The inner of plug 2 12 has directional post two 12a, center inside blocking cap 2 16 has guide portion two 16a of protrusion, directional post two 12a is inserted in guide portion two 16a, spring 2 13 is enclosed within outside guide portion two 16a, the length of directional post two 12a is greater than the displacement distance of plug 2 12, and the inner of directional post two 12a is positioned at guide portion two 16a when on the lower end surface that plug 2 12 is resisted against water passage hole 28.

This multifunction valve can control flowing mediums such as water, gas and oil, during normal use, pressure cap 4 is threaded in the outer end of screen pipe 2, the push rod 11 be connected to inside pressure cap 4 passes screen pipe 2 and plug 1 is inwardly pushed up pressure, plug 1 overcome spring 1 elastic force effect and away from water passage hole 1, now water passage hole 1 is in open mode, and plug 2 12 leans and on the lower end surface of water passage hole 28, water passage hole 28 closed under the elastic force effect of spring 2 13.Flowing medium enters from the feed-water end 1a of valve body 1 and enters in screen pipe 2 through water hole 1, after filter screen 3 filters, enter into the upper end surface of water passage hole 28, then by the pressure effect of flowing medium, make plug 2 12 overcome the elastic force effect of spring 2 13 and be opened by water passage hole 28, flowing medium is finally flow into the waterexit end 1b of valve body 1 by water passage hole 28.

Need to filter screen 3 is pulled down clean time, outside turn pressure cap 4, the push rod 11 be connected to inside pressure cap 4 can be together outwards mobile until be removed along with pressure cap 4, now push rod 11 and plug 1 depart from completely, plug 1 leans and on water passage hole 1, water passage hole 1 is closed under the elastic force effect of spring 1, and the flowing medium at feed-water end 1a place can not enter in screen pipe 2.Simultaneously, lose the pressure effect of flowing medium, water passage hole 28 is closed again by plug 2 12 under the elastic force effect of spring 2 13, like this because water passage hole 1 and water passage hole 28 are all closed, cut off completely between feed-water end 1a and waterexit end 1b, reach remove and cleaned filter screen 3 time valve body 1 pass in and out the automatic closedown at two ends, remove and cleaned filter screen 3 process in, the feed-water end 1a of valve body 1 or when going out the flowing medium at end place all can not to flow into screen pipe 2 interior and to external leakage.

In addition, except automatically closing turnover two ends when dismounting and cleaned filter screen 3, this multifunction valve can also realize the function such as throttling, cut-off.When turn pressure cap 4 control push rod 11 part inwardly or outwards move time, along with moving in or out of push rod 11, the gap length between plug 1 and water passage hole 1 can be controlled, thus reach the function of throttling.And when turn pressure cap 4 makes push rod 11 just be separated completely with plug 1, water passage hole 1 can be closed by plug 1 under the elastic force effect of spring 1, so, just cutoff function can be realized again, certainly, when realizing cutoff function, ensure that the section of the being threaded 4a length of pressure cap 4 the inner is greater than spring 1 can by the maximum value compressed, like this when water passage hole 1 is just closed by plug one 9 completely, pressure cap 4 still partial threads is connected on screen pipe 2.

When this multifunction valve can realize removing filter screen 3, self acting stop valve body 1 passes in and out the functions such as two ends, throttling and cut-off, no matter be which kind of function simultaneously, all realize only by push rod 11, plug 1, spring 1, plug 2 12 and spring 2 13, therefore while realizing several functions, greatly optimize the internal structure of valve, save the use of a large amount of constituent elements, make the overall structure of valve more simple, compact, and can greatly reduce cost of production and user cost again.

Embodiment two

The present embodiment with the structure of embodiment one and principle substantially identical, difference is: in the present embodiment, push rod 11 is connected on plug 1, when mounted, push rod 11 is placed in valve body 1 from mounting pipe 1 together with plug 1, the outer end of push rod 11 extend in screen pipe 2, plug 1 leans on water passage hole 7 under the elastic force effect of spring 1, then pressure cap 4 is threaded onto on screen pipe 2, along with the continuous screw-in of pressure cap 4, the inner side of pressure cap 4 and the outer end of push rod 11 lean and push rod 11 are inwardly pushed up pressure, because push rod 11 and plug 1 are connected mutually, therefore when pressure cap 4 by push rod 11, inwardly press by top, just can make plug 1 overcome spring 1 elastic force effect and away from water passage hole 1.

Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.

Claims

1. a multifunction valve, comprise the valve body (1) that two ends are respectively feed-water end (1a) and waterexit end (1b), described valve body (1) outside has to tilt and the screen pipe (2) communicated with valve body (1) inner chamber relative to valve body (1), filter screen (3) is provided with in described screen pipe (2), described screen pipe (2) outer end has been threaded pressure cap (4), it is characterized in that, described valve body (1) outside also has the mounting pipe one (5) that tilts relative to valve body (1) and mounting pipe two (6), described mounting pipe one (5) has identical axis with screen pipe (2), between screen pipe (2) and mounting pipe one (5), form water passage hole one (7) in described valve body (1) respectively and form water passage hole two (8) between screen pipe (2) and mounting pipe two (6), plug one (9) and spring one (10) is provided with in described mounting pipe one (5), described pressure cap (4) inner side is connected with push rod (11) and passes in push rod (11) inherent filtration pipe (2) and lean on plug one (9), described plug one (9) has the trend leaned on water passage hole one (7) lower end surface under the elastic force effect of spring one (10), plug two (12) and spring two (13) is provided with in described mounting pipe two (6), described plug two (12) leans on the lower end surface of water passage hole two (8) under the elastic force effect of spring two (13).

2. multifunction valve according to claim 1, it is characterized in that, described screen pipe (2) outer end madial wall is provided with O type circle (14), described pressure cap (4) the inner comprises the section of being threaded (4a) for being connected with screen pipe (2) end and seal section (4b), the length of the described section of being threaded (4a) is greater than the length of seal section (4b), and the inner edge of described O type circle (14) reclines mutually with the outside of the seal section (4b) of pressure cap (4) the inner.

3. multifunction valve according to claim 2, it is characterized in that, the length of the section of being threaded (4a) that described pressure cap (4) is inner is greater than push rod (11) and inwardly presses maximum value when plug one (9), spring one (10) being compressed in top.

4. the multifunction valve according to claim 1 or 2 or 3, it is characterized in that, described pressure cap (4) inside bottom center has protruding positioning part (4c), one end of described push rod (11) is fixed in positioning part (4c), and the other end top of described push rod (11) is pressed on plug one (9).

5. the multifunction valve according to claim 1 or 2 or 3, it is characterized in that, described valve body (1) and screen pipe (2) are integral type structure, the upper-end surface of described water passage hole one (7) has positioning step (7a) protruding ringwise, the inner of described filter screen (3) is enclosed within positioning step, and the outer end of described filter screen (3) is resisted against the inner side of pressure cap (4).

6. the multifunction valve according to claim 1 or 2 or 3, it is characterized in that, described valve body (1) and mounting pipe one (5) are integral type structure, the feed-water end (1a) of described mounting pipe one (5) from valve body (1) lateral valve body (1) tilts, the end thread of described mounting pipe one (5) is connected with blocking cap one (15), and the two ends of described spring one (10) lean respectively on plug one (9) and blocking cap one (15).

7. multifunction valve according to claim 6, it is characterized in that, the inner of described plug one (9) has the directional post one (9a) of protrusion, the center of described blocking cap one (15) inner side has the guide portion one (15a) of protrusion, described directional post one (9a) inserts in guide portion one (15a), described spring one (10) is enclosed within guide portion one (9a) outside, the inner of directional post one (9a) described in when plug one (9) leans on the lower end surface of water passage hole one (7) under the elastic force effect of spring one (10) is positioned at guide portion one (15a).

8. the multifunction valve according to claim 1 or 2 or 3, it is characterized in that, described valve body (1) and mounting pipe two (6) are integral type structure, described mounting pipe two (6) tilts from the waterexit end (1b) of valve body (1) lateral valve body (1), the end thread of described mounting pipe two (6) is connected with blocking cap two (16), and the two ends of described spring two (13) lean respectively on plug two (12) and blocking cap two (16).

9. multifunction valve according to claim 8, it is characterized in that, the inner of described plug two (12) has the directional post two (12a) of protrusion, the center of described blocking cap two (16) inner side has the guide portion two (16a) of protrusion, described directional post two (12a) inserts in guide portion two (16a), described spring two (13) is enclosed within guide portion two (16a) outside, the inner of directional post two (12a) described in when plug two (12) leans on the lower end surface of water passage hole two (8) under the elastic force effect of spring two (13) is positioned at guide portion two (16a).

10. a multifunction valve, comprise the valve body (1) that two ends are respectively feed-water end (1a) and waterexit end (1b), described valve body (1) outside has to tilt and the screen pipe (2) communicated with valve body (1) inner chamber relative to valve body (1), filter screen (3) is provided with in described screen pipe (2), described screen pipe (2) outer end has been threaded pressure cap (4), it is characterized in that, described valve body (1) outside also has the mounting pipe one (5) that tilts relative to valve body (1) and mounting pipe two (6), described mounting pipe one (5) has identical axis with screen pipe (2), between screen pipe (3) and mounting pipe one (5), form water passage hole one (7) in described valve body (1) respectively and form water passage hole two (8) between screen pipe (3) and mounting pipe two (6), plug one (9) and spring one (10) is provided with in described mounting pipe one (5), described plug one (9) is fixed with push rod (11) and the outer end of push rod (11) to be stretched in screen pipe (3) and leaned in pressure cap (4) inner side, described plug one (9) has the trend leaned on water passage hole one (7) lower end surface under the elastic force effect of spring one (10), plug two (12) and spring two (13) is provided with in described mounting pipe two (6), described plug two (12) leans on the lower end surface of water passage hole two (8) under the elastic force effect of spring two (13).