CN101173717A - Valve and method for using the same - Google Patents
Valve and method for using the same Download PDFInfo
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- CN101173717A CN101173717A CNA2007101623739A CN200710162373A CN101173717A CN 101173717 A CN101173717 A CN 101173717A CN A2007101623739 A CNA2007101623739 A CN A2007101623739A CN 200710162373 A CN200710162373 A CN 200710162373A CN 101173717 A CN101173717 A CN 101173717A
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Abstract
The invention embodiment provides a valve, which comprises a valve body, a valve core, a first sealing element and at least a second sealing element; wherein, a cavity and a plurality of fluid passages are arranged in the valve body, and each fluid passage comprises a first fluid port and a second fluid port; the first fluid port is communicated with the cavity and the second fluid passage is used to communicate with an external device. The valve core can rotate inside the cavity; and the first sealing element seals the cavity from the outside ambient. The second sealing element divides the space between the valve body and valve core into a plurality of sectors, each of which is corresponding to at least one first fluid port, so as to guide the liquid in the corresponding external device into the sector; thus, the pressure difference of the liquid at both sides of the second sealing element is less than the fluid pressure at least at one side.
Description
[technical field]
The present invention relates to a kind of valve, more particularly, relate to a kind of valve applicable to the high-pressure work environment.On the other hand, the invention still further relates to a kind of from a plurality of fluid origins, the method for a fluid of gating in the high-pressure liquid source especially; And a kind of method of the flow direction of change fluid, especially high-pressure liquid.
[background technique]
The valve that various uses and function are arranged in the market is as switching valve, throttle valve, sampling valve, sluice valve or the like.The valve of which kind of type no matter, has similar basic structure mostly, empty valve body and spool that is assembled in this valve body promptly, valve body are provided with fluid port fluid being imported or discharges valve body, sway in valve body or move along axle by spool and realize its function.
The service behaviour of this class valve depends on the tightness degree that valve body and spool cooperate on the one hand.If the fluid that imports in the valve body is a high-pressure liquid, then described high-pressure liquid has an axial thrust to spool, and this end thrust will make spool produce displacement vertically, and then destroys the cooperation of valve body and spool.
On the other hand, the service behaviour of this class valve also depends on the sealability of the seal element at fluid port place.Usually under the situation, the suffered pressure of its seal element is directly proportional with hydrodynamic pressure by fluid port.Thereby it can not bear the working environment of high pressure, otherwise the suffered pressure reduction of these seal elements is very big, and seal element can produce displacement and distortion, and then influences sealing effect.
Therefore, be necessary to provide a kind of valve that can bear high pressure, it can guarantee reliable sealing effect between each fluid port.
[summary of the invention]
An aspect of of the present present invention is to provide a kind of valve, and it is suitable for using under the high pressure operating mode, and it can guarantee reliable sealing effect between each fluid port.
The invention provides a kind of valve, this valve comprises: valve body, spool, first seal element and second seal element.Valve inner is provided with a cavity, and this cavity has an opening at an end of valve body.Also be provided with a plurality of fluid passages on the valve body, each fluid passage includes the first fluid port and second fluid port, and wherein, the first fluid port is communicated with cavity, and second fluid port is used for being connected with external means.Spool can be inserted in the cavity by the opening of cavity, and valve body motion relatively.And be formed with a space at valve body and valve core chamber.First seal element is used to prevent the opening leakage of the interior fluid of valve body from cavity.Second seal element has one or more, and it is separated out several zones in the space of valve body and valve core chamber, and each zone contains at least one first fluid port the fluid in the external means of correspondence is imported in the zone separately.Therefore, in the time of in fluid is directed to these zones, the fluid pressure differential of each second seal element both sides will be less than the hydrodynamic pressure of this second seal element either side.
Another aspect of the present invention be to provide a kind of from a plurality of fluid origins the method for a fluid of gating, may further comprise the steps:
A kind of valve is provided, described valve comprises valve body, spool and a plurality of seal element, described valve body and valve core chamber are formed with a space, also have a plurality of fluid input channels to be used for the fluid in external fluid source is input in this space on the described valve body, described spool includes a fluid passage, and described seal element is separated out several zones in described space;
Locate the position of described spool, so that fluid can be imported by at least one fluid input channel in each described zone in it, thereby the fluid pressure differential of each second seal element both sides is less than the hydrodynamic pressure of at least one side of this second seal element;
Fluid at least one selection area is exported to outside the valve by the fluid passage on the spool.
One side more of the present invention is to provide a kind of method that changes direction of flow, may further comprise the steps:
A kind of valve is provided, described valve comprises valve body, spool and a plurality of seal element, described valve body and valve core chamber are formed with a space, described seal element is separated out several zones in described space, also have a plurality of fluid input channels to be used for the fluid in external fluid source is input in this space on the described valve body, and also have at least one fluid output channel to be used to export fluid in this space on the described valve body;
Locate the position of described spool, so that fluid can be imported by at least one fluid input channel in each described zone in it, fluid at least one zone can output to outside the valve by at least one fluid output channel, thereby the fluid pressure differential of each second seal element both sides is less than the hydrodynamic pressure of at least one side of this second seal element.
[brief description]
Fig. 1 is the sectional drawing of the valve of a preferred embodiment of the present invention;
Fig. 2 is the partial enlarged drawing of second seal element part of valve among Fig. 1;
Fig. 3 is the partial enlarged drawing of first seal element part of valve among Fig. 1;
Fig. 4 is the sectional drawing of the valve of the another preferred embodiment of the present invention;
Fig. 5 is the sectional drawing of the valve of the another preferred embodiment of the present invention;
Fig. 6 is the schematic representation of the valve of the another preferred embodiment of the present invention;
Fig. 7 is the sectional drawing of the valve among Fig. 6;
Fig. 8 is that the partial enlarged drawing of valve among Fig. 6 is to clearly illustrate second seal element of one gating port correspondence;
Fig. 9 is that the A of second seal element among Fig. 8 is to view;
Figure 10 is the profile schematic representation of the valve of the another preferred embodiment of the present invention;
Figure 11 is the sectional drawing of the valve among Figure 10;
Figure 12 is another similar configuration of the valve among Figure 10;
Figure 13 is the sectional drawing of the valve of the another preferred embodiment of the present invention;
Figure 14 is the schematic top plan view of the valve among Figure 13 of the present invention;
Figure 15 is the sectional drawing of valve under another kind of state among Figure 13 of the present invention;
Figure 16 is the sectional drawing of the valve of the another preferred embodiment of the present invention;
Figure 17 is the sectional drawing of the valve of the another preferred embodiment of the present invention;
Figure 18 is the schematic top plan view of the valve among Figure 17 of the present invention;
Figure 19 is the sectional drawing of valve under another kind of state among Figure 17 of the present invention;
Figure 20 is the sectional drawing of the valve of the another preferred embodiment of the present invention.
[embodiment]
Provide specific embodiments of the invention so that the present invention is further illustrated below in conjunction with accompanying drawing.
Be illustrated in figure 1 as a kind of valve that one embodiment of the invention provides, be the valve that a kind of spool can move along axial direction in valve body specifically, it has the gating function, can be from a plurality of fluid inlets gating at least one also will be wherein fluid derive from one, the fluid in the fluid inlet of gating is not derived from another or many places.
As shown in Figure 1, valve 100 comprises valve body 1, spool 2, first seal element 30 and at least two second seal elements 40 (although only having illustrated two among the figure).The inside of valve body 1 is provided with cavity 10, and cavity 10 extends along the direction of its virtual axis 3, at an end 5 of valve body 1 opening 4 is arranged.Spool 2 is inserted in the cavity 10 by the opening 4 of cavity 10, and can along cavity 10 axially (reach hereinafter in the claim also the direction of cavity 10 along axis 3 is defined as axially, the vertical direction of direction is defined as radially therewith) move back and forth.
In one embodiment, cavity 10 and spool 2 are tubular, and both are concentric.The external diameter of spool 2 is slightly less than the diameter of cavity 10.Therefore at the wall of cavity 10 or valve body 1 forms the internal surface 15 of cavity 10 and 25 of the outer surfaces of spool 2 are formed with a space 14.
Spool 2 can be connected with the drive unit (not shown) of outside, externally can make straight line type or gyrate vertically under the driving of drive unit in cavity 10.Perhaps, also drive unit can be set, and by 2 motions of manually-operable spool.
Be provided with a fluid passage 20 (being also referred to as " gating passage 20 ") in the spool 2, its have one with gating zone 50 fluid ports that are communicated with 21 (being also referred to as " gating port 21 ").In other embodiments, a plurality of gating ports 21 also can be set.Thereby gating passage 20 can be communicated with detection device such as gating zone 50 and external means such as mass spectrometer, chromatograph or treatment device such as reactor, mixer etc.Like this, by gating passage 20, can be in external means with the FLUID TRANSPORTATION in the gating zone 50.The position in gating zone 50 changes with the motion of spool 2 relative valve bodies 1, and gating zone 50 can at least one first fluid port of gating, and will import in the gating passage 20 on the spool 2 from this fluid by the first fluid port of gating.Thereby, imported in the external means by the fluid of gating.Other not by the fluid of the first fluid opening of gating then after coming together in doab 51 and 52 from valve body outside the first fluid opening 11a and 11b discharge valve as fluid output.Therefore, valve 100 shown in Figure 1 has the gating function, i.e. the function of one of gating from a plurality of fluids.
In one embodiment, as shown in Figure 1, gating passage 20 is L-shaped passage, and the part of gating passage 20 extends to the end face 22 of the end that spool 2 is connected with external driver device along the medial axis of spool 2.Certainly, gating passage 20 also can be the passage of other shapes or trend, as long as it can export to valve outward with the fluid in the gating zone 50.
Fig. 2 and Fig. 3 are the partial enlarged drawing of valve shown in Figure 1, are used to clearly illustrate the structure of second seal element 40 and first seal element 30.
As shown in Figure 2, second seal element 40 all is arranged on the spool 2, and is provided with around spool 2.The cylindrical shape of spool 2 in the corresponding present embodiment, second seal element 40 can be made as O-ring seals.In other embodiment, second seal element 40 can be made as other shapes.In one embodiment, be arranged in the groove 41 radially having a closed pockets 41, the second seal elements 40 on the side face around spool 2.
To valve 100 as shown in Figure 1, in one embodiment, the fluid inlet 11 on the valve body is equally spaced, and the spacing of two second seal elements 40 is less than the spacing of two adjacent fluid inlets, so that gating zone 50 only can fluid inlet 11 of gating.In other embodiments, gating zone 50 a plurality of fluid inlets of gatings simultaneously if desired, the then corresponding adjustment of the spacing of two second seal elements 40.
As shown in Figure 3, first seal element 30 can be a seal ring.The cylindrical shape of spool 2 in the corresponding present embodiment, first seal element 30 is preferably O-ring seals.First seal element 30 can be arranged to be embedded on the valve body 1 around cavity 10.In one embodiment, having groove 31, the first seal elements 30 that seal on the valve body 1 is arranged in the groove 31.
Valve 100 shown in Figure 1, but fluid inlet of its single gating.In different embodiments, valve 100 also can be arranged to two fluid inlets of gating simultaneously, carry out combined experiments or other purposes such as the fluid in two fluid inlets of while gating, two zones (being the gating zone) that have the gating port respectively then can be set by the number that increases by second seal element, make each gating zone following fluid inlet (being similar to valve as shown in Figure 7) on the corresponding valve body in working order, perhaps a gating zone with gating port is set and makes its two fluid inlets of correspondence simultaneously down in working order by the spacing that increases by second seal element.Based on similar principle, valve of the present invention also can be arranged to the fluid in three or more fluid inlets of while gating.
Being illustrated in figure 4 as the related valve 200 of another preferred embodiment of the present invention, is a kind of valve with gating function.It has valve 100 similar structures as shown in Figure 1, and different is the number of the fluid passage on the valve body.The valve 200 of present embodiment has the minimal amount of the fluid passage of this class formation valve, i.e. four fluid passages, this valve can be from two fluid passages one of gating and fluid wherein derived from a fluid output, with another not the fluid in the fluid passage of gating from another fluid output derivation.
4 fluid passages on the corresponding valve body 1, its first fluid port 211a, 211b, 211c and 211d directly are communicated with cavity 10, wherein can be made as fluid output near the first fluid port 211d of cavity 10 opening ends 4 with at the first fluid port 211c of valve body 1 closed end 6, all the other first fluid port 211a and 211b are made as fluid inlet.Such two fluid output 211c and 211d are limited to two fluid inlet 211a and 211b on valve body 1 internal surface between them.
Other elements of valve 200 because of similar with valve 100, see also the description of the present invention about valve 100 as structure of the position of first seal element 230 and structure, second seal element 240 etc., are not described in detail in this.
Externally motion vertically in cavity 10 under the driving of drive unit (not shown) of spool 2, thus gating zone 250 can be in two fluid inlet 211a and 211b one of gating.In working position (or being called working state) as shown in Figure 4, fluid inlet 211a is communicated with gating zone 250, and the fluid in this fluid inlet 211a outputs in the external means through gating port 221 and gating passage 220 after entering in the gating zone 250 more successively; And do not entered doab 251 near cavity 10 outlet end 4 by the fluid in the fluid inlet 211b of gating, again in fluid output 211d and corresponding fluid passage are discharged to accommodation apparatus outside the valve body.When spool 2 when cavity 10 outlet end 4 move to next working position, fluid inlet 211b will be communicated with gating zone 250, output in the external means through gating port 221 and gating passage 220 successively after the fluid in this fluid inlet 211b enters gating zone 250 again; Fluid inlet 211a then is positioned at the same area 252 with fluid output 211c, and the fluid in it is in fluid output 211c and corresponding fluid passage are discharged to accommodation apparatus outside the valve body 1.
Be illustrated in figure 5 as another preferred embodiment of the present invention, relate to a kind of valve with gating function, its can be from a plurality of fluid inlets gating at least one.This valve 300 has valve 100 similar structures as shown in Figure 1, but the number of fluid passage is different on the structure of second seal element 340 and the valve body.
Valve 300 has minimized number fluid passage in the valve of this class formation.3 fluid passages are arranged on the valve body of valve 300, and each fluid passage has a first fluid port that directly is communicated with cavity 10.In other embodiments,, on the valve body a plurality of fluid passages can be set according to different needs, as 4,5,6,10,15,20, or the like.As shown in Figure 5, the first fluid port 311a and the 311b that face the spool side face can be made as fluid inlet, and the first fluid port 311c that faces spool one end face is made as fluid output.
Therefore, second seal element 340 is divided into two zones with the zone of 2 of valve body 1 and spools, i.e. 350 and doabs 351, a gating zone, and doab 351 is communicated with on axially at spool 2.The position in gating zone 350 can change with the motion of spool 2 relative valve bodies 1, so gating zone 350 is along with the motion of spool 2 can the different first fluid port of gating.
Be provided with a fluid passage 320 (being also referred to as " gating passage 320 ") in the spool 2, gating passage 320 have one with the gating zone 350 gating ports 321 that directly are communicated with.A plurality of such gating ports also can be arranged in other embodiments.Gating passage 320 is connected with the device (not shown) of outside gating zone 350 as mass spectrometer or chromatograph etc.Therefore, gating passage 320 can export to the fluid in the gating zone 350 outside the valve.
Other elements of valve 300 because of similar with valve 100, see also the description of the present invention about valve 100 as the position of first seal element 330 and structure etc., are not described in detail in this.
The externally motion vertically in cavity 10 under the driving of drive unit (not shown) of the spool 2 of valve 300.In position as shown in Figure 5, fluid inlet 311a is communicated with gating zone 350, and the fluid in the fluid inlet 311a outputs in the external means through gating passage 320 after entering in the gating zone 350 again; And do not entered doab 351 by the fluid in the fluid inlet 311b of gating, again in fluid output 311c and corresponding fluid passage are discharged to accommodation apparatus outside the valve body.When operation spool 2 arrives next working position after the motion of cavity 10 outlet end, fluid inlet 311b is communicated with gating zone 350, to gating zone 350 input fluids, fluid enters in the gating zone 350 by this fluid inlet 311b, after output in the external means through gating passage 310 again; Fluid inlet 311a then is positioned at doab 351 with fluid output 311c, and the fluid in it is in fluid output 311c and corresponding fluid passage are discharged to accommodation apparatus outside the valve body 1.
Fig. 6, Figure 7 shows that one embodiment of the invention relates to another kind of valve 400, specifically, relate to many mouthfuls of sluice valves of a kind of straight line type that can freely assemble.This valve 400 can be used for from a plurality of fluid inlets two of gatings simultaneously and fluid that will be wherein derives from one, and the fluid in all the other imports is derived respectively from the fluid output at valve two end part.This valve 400 can be as required assembled by the unit spool and the unit valve body of some.
As Fig. 6, shown in Figure 7, valve 400 comprises: valve body 1, and it is by three unit valve body 1a, and 1b, 1c removably assemble an integral body.Wherein unit valve body 1a inside is provided with a cylindrical unit cavity, and this unit cavity has an opening at the end of valve body 1a.All the other two unit valve body 1b, 1c inside is respectively equipped with a cylindrical unit cavity, and this Unit two cavity is at corresponding valve body 1b, and the two ends of 1c have an opening respectively.Each unit cavity can form a coaxial isometrical cylindrical cavity 10 after the unit valve body connects.Certainly, in other embodiments, valve body 1 also can be combined by two or more unit valve bodies.
Unit valve body 1a, 1b and 1c are respectively equipped with a plurality of fluid passages 410, and there are a first fluid port and one second fluid port in each fluid passage 410.Fluid passage 410, with and the first fluid port and second fluid port, approximate with the fluid passage 110 of valve 100 and port thereof, please refer to above stated specification.Similarly, the first fluid port 411a and the 411b that are arranged on valve body 1 opposite end can be set to fluid output, by fluid passage 410a corresponding on the valve body and 410b the fluid in the cavity 10 are exported in the external means; Remaining first fluid port 411 can be made as fluid inlet, by fluid passage 410 corresponding on the valve body fluid in the external means is imported in the cavity.
Further, valve 400 also comprises a plurality of second seal elements, second seal element 440a and the 440b as shown, and it is arranged on the unit spool 2M.Wherein, have two second seal element 440a to be provided with around unit spool 2M, gating fluid port 421a is between this two second seal element 440a.As Fig. 8 and shown in Figure 9, the second seal element 440b is around gating fluid port 421b or a first fluid port 411 and be provided with, but not around unit spool 2M.These second seal elements 440a and 440b become four zones 450,451,452 and 453 with the separated by spaces of 2 of valve body 1 and spools.Wherein, the zone 450 that contains gating fluid port 421a is called gating zone 450 and 451 with the zone 451 that contains gating fluid port 421b, and other is called doab 452 and 453 in two zones 452 and 453.
Being provided with of fluid inlet 411 and the second seal element 440a and 440b can make gating zone 450 and 451 while at least one fluid inlet of gating respectively, and each fluid inlet 411 can be successively by gating.When relative valve bodies 1 motion of operation spool 2, two gating zones 450 and 451 are fluid inlet of gating and will fluid be wherein exported to the accommodation apparatus of outside through gating passage 420 with the form of mixture respectively.After then not collected in corresponding doab 452 and 453 respectively, be discharged into outside the valve by fluid passage 411a and 411b by the fluid in the fluid inlet of gating.
Further, by unit valve body 1a, the valve body 1 that 1b, 1c constitute is at opening end, promptly unit valve body 1c be provided with one prevent fluid particularly the fluid in the doab along the space of 2 of valve body 1 and spools outside first seal element 430 of leakage.It can be arbitrary sealing means of the prior art.
As shown in Figure 7, also being provided with the 3rd seal element 460 between adjacent unit valve body reveals between the unit valve body with the fluid that prevents the doab.Adjacent unit valve core chamber also is provided with fluid that the 4th seal element 470 is leaked to doab or doab with the fluid that prevents to select in the circulation road 420 from the unit valve core chamber and is leaked to and selects in the circulation road 420.The 3rd seal element 460 and the 4th seal element 470 can be arbitrary sealing means of the prior art, and this does not describe in detail again.
To valve shown in Figure 7 400, in one embodiment, its valve body 1 is combined by 3 unit valve bodies, is provided with 8 fluid introduction channels and 2 fluids derivation passages on the valve body 1 altogether.Yet, under some use occasion, if only need 4 fluid introduction channels, the unit valve body 1b in the middle of can taking off easily and directly unit valve body 1a and 1c are coupled together and become the sluice valve of 4 fluid introduction channels; When 8 fluid introduction channels can not be satisfied the demand if more sample fluid is arranged, then can increase the number of unit valve body 1b easily, for example increase that a unit valve body 1b can increase by 4 fluid introduction channels and the sluice valve that becomes 12 fluid introduction channels, increase that two unit valve body 1b can increase by 8 fluid introduction channels and the sluice valve that becomes 16 fluid introduction channels, or the like.Correspondingly, when causing spool not satisfy the demand, can increase one or more unit spools that only are provided with the gating passage between 2N at unit spool 2M when increasing the unit valve body; Certainly increase the number of selected through-flow body sample if desired, as be increased to three fluid samples of gating simultaneously from two fluid samples of while gating, then can be at unit spool 2M, increase a unit spool that not only had been provided with the gating passage but also had been provided with the gating port between 2N.
From above description to valve 100, valve 200, valve 300, valve 400 as can be known, it is not at first entered the doab by the fluid in the fluid inlet of gating, fluid in the doab is more successively through being discharged to the accommodation apparatus outside the valve body as the first fluid port of fluid output and corresponding fluid passage, therefore the concrete number of the fluid passage of fluid output and correspondence thereof is not limit, can be 1 or 2 or a plurality of, its minimal number is associated with the number in the gating zone that is provided with the gating port and the sealing means of its set-up mode and second seal element.
For instance, no matter how the gating zone is provided with, if all adopting, whole second seal elements can be provided with around one or more first fluid ports, then an embodiment of valve 300 is the same as described above fluid output and corresponding fluid passage thereof, one (also can be provided with a plurality of certainly) only is set, and fluid output can be arranged on the arbitrary position on the valve interior surface because the doab is an integral body under this kind sealing means, all not the fluid inlet of gating all communicate with the doab.
When at least one gating area relative second seal element is to be provided with around spool, then the doab no longer has only one and several mutual disconnected doabs are arranged, then described as the previous embodiment of valve 100 and valve 200, fluid output and corresponding fluid passage thereof should be provided with a plurality of, and each doab should be provided with a fluid output at least.Preferably, the two ends that valve body is relative should be respectively arranged with at least one fluid output all fluid inlets are limited on the valve body between them.
Figure 10 and a kind of valve 500 that Figure 11 shows that another embodiment of the present invention, be the valve that a kind of spool can rotate relative to valve body specifically, it has the gating function, by the relatively rotating from a plurality of fluid inlets one of gating and the fluid of gating is derived from a fluid passage of spool, will derive from another fluid passage after the fluid collection in the fluid inlet of gating not.
As shown in Figure 10 and Figure 11, valve 500 comprises valve body 1, spool 2, first seal element 530 and at least two second seal element 540a and 540b (although having only two second seal element 540a and 540b to illustrate out in the drawings).
Upper valve body 1a is provided with a cavity 10, and cavity 10 has an opening respectively at the relative two ends of upper valve body 1a.Wherein, cavity 10 opening is by valve body 1b sealing down.First seal element 530 is arranged on the upper valve body 1a, and near cavity 10 untight opening ends, thereby it can seal cavity 10 in case the fluid in it leaks outside after spool 2 extend into cavity 10.
The first fluid port 511a that fluid passage 510a is comprised can be set to fluid output and be used for the fluid of gating not is discharged to outside the valve by fluid passage 510a.The first fluid port 511b that fluid passage 510b is comprised can be set to fluid output and be used for the fluid of gating is discharged to outside the valve by fluid passage 510b.All the other first fluid ports 511 can be made as fluid inlet and be used for the fluid of external means is imported in the valve by each self-corresponding fluid passage 510.
In one embodiment, cavity 10 and spool 2 are concentric cylindrical body.The external diameter of spool 2 is slightly less than the diameter of cavity 10.Therefore between the outer surface of the wall (or internal surface of valve body 1) of cavity 10 and spool 2, be formed with a space.
In one embodiment, be arranged to can be around at least one first fluid port for the second seal element 540a and 540b.These second seal elements 540a and 540b become at least 3 zones 550,551 and 552 with the wall of cavity 10 with the space segmentation that the outer surface of spool 2 forms, and each second seal element is between two adjacent zones.The second seal element 540a and 540b are arranged on the spool 2, and therefore, the border in zone 550,551 and 552 can change with the rotation of spool 2.Zone 550 is communicated with into a zone with 551 through gating passage 520.The zone 550 can be made as the gating zone, can at least one fluid inlet 511 of gating, after being entered into gating zone 550, be directed to gating passage 520 by the fluid in the fluid inlet of gating.The zone 551 gating fluids that can accept from gating passage 520, and by fluid passage 510 the gating fluid is discharged to outside the valve.Therefore, when gating zone 550 imports fluid by a first fluid port in it, zone 551 fluids that also thereupon are imported into from this first port.The zone 552 can be made as the doab, is used for collecting from the fluid of gating fluid inlet not, and is discharged to outside the valve by fluid passage 510a.
In one embodiment, along with spool 2 rotating relative to valve body 1, can be in order to ensure fluid inlet 511 successively by gating zone 550 gatings, the corresponding position of a virtual axis 53 of each fluid inlet 511 relative spool 2 preferably can be contained by the corresponding position of gating zone 550 relative these virtual axis 53.For example, as shown in figure 11, all fluid inlets 511 all are arranged on the cross section perpendicular to virtual axis 53 of upper valve body 1a.Correspondingly, as shown in figure 10, these fluid inlet 511 pairing second fluid ports can be arranged on the same cross section of valve body.
In one embodiment, for first fluid port 511b can be communicated with zone 551, thereby the gating fluid in the zone 551 can be discharged to outside the valve by first fluid port 511b and corresponding fluid passage 510b thereof, as shown in figure 11, the second seal element 540b that forms zone 551 can be provided with around the axis 53 of spool 2, and first fluid port 511b can be arranged on down on the valve body 1b and be positioned on the axis 53 of spool 2.Like this, first fluid port 511b opposed area 551 transfixions.Perhaps, as shown in figure 12, the second seal element 540b that forms zone 551 can be provided with around spool 2, thereby zone 551 is big zone around spool 2, and first fluid port 511b can be arranged on the 511 any positions that can contain, zone.
Perhaps, also the second seal element 540b and fluid passage 510b can be set.Replace, be similar to the setting of valve shown in Figure 1, gating passage 520 on the spool 2 is directly extended to the end that spool 2 is connected with drive unit, and gating fluid port 521b is arranged on the end face of this end of spool 2 or other position directly being communicated with external means.Thereby the gating fluid directly is discharged to external means from gating zone 550 by the gating passage 520 on the spool 2.
The related valve 600 of the another kind of embodiment of Figure 13～Figure 15 shows that the present invention, specifically, relate to a kind of have switch and/or the valve of sampling function, different fluid ports can be communicated with the various flows of realization fluid to.
This valve 600 comprises valve body 1, and its inside is provided with a cylindrical cavity 10.Cavity 10 has an opening at an end of valve body 1.Valve body 1 also is provided with a plurality of fluid passages, for example 6 fluid passages as shown in figure 13.There are a first fluid port and one second fluid port in each fluid passage.First fluid port 611a, 611b, 611c, 611d, 611e, 611f directly is communicated with cavity 10.Preferably, these first fluid ports are set in place equally spacedly that same axial cross section in cavity 10 1 sides (cross section parallel with the virtual axis 63 of cavity 10) is gone up but on the different radial cross section (cross section vertical with the virtual axis 63 of cavity 10).Second fluid port is arranged on the outer surface of valve body 1, is used for being connected with devices such as outside accommodation apparatus or detection devices.
This valve 600 also comprises a cylindrical spool 2.Spool 2 extend in the cavity 10 by the opening of cavity 10, and is connected with a drive unit (not shown).Therefore, it externally does reciprocating linear motion or reciprocal spiralling along the virtual axis 63 of cavity 10 in cavity 10 under the driving of drive unit.In one embodiment, the radial dimension of spool 2 is slightly less than the corresponding size of cavity 10, so is formed with a space between the outer surface of the wall of cavity 10 and spool 2.
This valve 600 also comprises one first seal element 630, is arranged on the valve body 1 and close cavity 10 openings, is used for cavity 10 is sealed in case the fluid in it is leaked to outside the valve with extraneous.In one embodiment, first seal element 630 is a seal ring, and it also can be of the prior art other and has the seal approach of this function certainly.
This valve 600 also comprises a plurality of second seal elements.For example, as shown in figure 13, be provided with three second seal elements 640 around spool 2.In one embodiment, these second seal elements 640 are seal ring, as O-ring seals.Preferably, have a plurality of closed pockets around spool 2 on the outer peripheral surface of spool 2, these second seal elements 640 are separately positioned in the corresponding groove.
Therefore, these second seal elements 640 make the zone of 2 of the wall of cavity 10 and spools be divided into a plurality of zones, and one of them zone comprises two sub regions that are communicated with by fluid passage 620.These regional positions will change with the motion of spool 2 relative valve bodies 1.
In one embodiment, as shown in figure 14, these second seal elements 640 are equally spaced, and the axial distance of adjacent two second seal elements 640 is greater than the axial spacing of adjacent two first fluid ports.Therefore along with the motion of spool 2, per two first fluid ports can be housed in the zone.When spool 2 moves to as shown in figure 15 position, each aforementioned subregion can be accommodated one first port within it respectively.
Be that valve 600 is in the situation under a kind of working state as shown in figure 13, first fluid port 611a and first fluid port 611b are housed in the zone, first fluid port 611c and first fluid port 611d are housed in another zone, and first fluid port 611e and first fluid port 611f are housed in the another zone; Be that valve 600 is in the situation under the another kind of working state as shown in figure 15, motion along with spool 2, first fluid port 611a and first fluid port 611f are housed in the zone, first fluid port 611b and first fluid port 611c are housed in another zone, and first fluid port 611d and first fluid port 611e are housed in the another zone.Thereby the zone that is partitioned into by second seal element 660 is along with the motion of spool 2 is communicated with different first fluid ports under different working staties, thereby realizes the switching of fluid between different port.
When valve 600 used as sampling valve, its first fluid port 611a can be made as the fluid sample import, so that required sample is imported in the valve from sample source; First fluid port 611b can be made as Waste outlet, is communicated with the refuse accommodation apparatus of outside, so that unwanted sample in the valve or other fluids are exported to the refuse accommodation apparatus; First fluid port 611c and 611f are by outside conduit or sampling pipe or the connection of other similar devices, thus the collection sample; First fluid port 611d can be made as carrier gas inlet, is connected with the carrier gas original device of outside, so that carrier gas is imported in the valve; First fluid port 611e is communicated with devices such as outside mass spectrometer or gas chromatographicanalyzers, is input in these install with sample that will collection.
State as shown in figure 15 is the fluid sample collection status, and this moment, fluid sample passed through first fluid port 611a successively, 611f, and 611c and 611b, thus the outer conduit between first fluid port 611f and 611c or other similar devices are full of fluid sample.
State as shown in figure 13 is the transmission state that carrier gas is delivered to fluid sample in devices such as outside mass spectrometer or gas chromatographicanalyzer, carrier gas is successively through first fluid port 611d, 611c, 611f and 611e, and then the outer conduit or the fluid sample in other similar devices that will be stored between first fluid port 611f and 611c are delivered to devices such as outside mass spectrometer or gas chromatographicanalyzer.
Figure 16 shows that a kind of valve that another embodiment of the present invention is related, specifically, relate to a kind of have switch and/or the valve of sampling function, its different fluid ports can be communicated with the various flows of realization fluid to.The concrete structure of this valve 700 is similar to valve shown in Figure 15 600, and difference is that the subregion at valve shown in Figure 16 700 two ends is to be communicated with into a zone by the gating passage 720 on the valve body 1.
The switching of valve 700 and/or sampling function are similar to valve 600 shown in Figure 15 with other elements, do not repeat them here, and please refer to the description to valve 600.
Figure 17～Figure 19 shows that a kind of valve 800 that another embodiment of the present invention is related specifically, is a kind of valve with switching function, different fluid port can be communicated with the various flows that realizes fluid to.Compare with aforesaid valve 700, valve 800 has the second multi-form seal element.
This valve 800 comprises valve body 1, and its inside is provided with a cuboid shape cavity 10.Cavity 10 has an opening at an end of valve body 1.Valve body 1 also is provided with a plurality of fluid passages, for example, and four fluid passages as shown in figure 17.Once, valve 800 will be that example is described to have four fluid passages, although it can be provided with the more fluid passage.There is a first fluid port that directly is communicated with cavity 10 each fluid passage and is arranged on second fluid port of valve body 1 outer surface.
In one embodiment, the first fluid port is a spaced set, and all is positioned at the same side of cavity 10.First fluid port space set is fluid inlet and fluid output, is made as fluid inlet as first fluid port 811a and 811c, and first fluid port 811b and 811d are made as fluid output; Or first fluid port 811a and 811c be made as fluid output, and first fluid port 811b and 811d are made as fluid inlet.Second fluid openings on the outer surface of valve body 1 is used for being connected with devices such as outside accommodation apparatus or detection devices.Therefore, can export to outside the valve to valve importing fluid or with the fluid in the valve by the fluid passage.
This valve 800 also comprises a cuboid shape spool 2, and its undersized that directly makes progress is in the corresponding size of cavity 10.Spool 2 is inserted in the cavity 10 by the opening end of cavity 10, and is connected with a drive unit (not shown), and externally the driving lower edge cavity 10 of drive unit axially does reciprocating linear motion.The outer surface of the wall of cavity 10 and spool 2 is formed with a space.
Therefore, second seal element 840 becomes a plurality of zones with the space segmentation of 2 of cavity 10 and spools, two zones 850 as shown in figure 17 and 851.The border in zone 850 and 851 will change with the motion of spool 2.
As shown in figure 17, first fluid port 811a and first fluid port 811b are housed in the zone 850, thereby realize the connection of first fluid port 811a and first fluid port 811b; First fluid port 811c and first fluid port 811d are housed in the zone 851, to realize the connection of first fluid port 811c and first fluid port 811d.Fluid is expelled to outside different detection devices or other devices from first fluid port 811b and first fluid port 811d respectively after entering into separately zone from first fluid port 811a and first fluid port 811c respectively again.Like this, along with the motion of spool 2, under different working staties, different fluid inlets and fluid output will be accommodated in each zone.As in position shown in Figure 19, first fluid port 811c and first fluid port 811b are housed in the zone 850, and first fluid port 811a and first fluid port 811d are housed in the zone 851.Therefore, the fluid among first fluid port 811a and the first fluid port 811c is transported in corresponding detection device or other devices through first fluid port 811d and 811b respectively.Thereby the zone that is formed by seal element 840 is along with the motion of spool 2 is communicated with different first fluid ports to realize the switching of fluid at different port in different positions.
The valve 800 of present embodiment is under the situation that increases the fluid passage and second seal element, also can use as sampling valve simultaneously, promptly become the sampling valve/switching valve of six fluid passages as increasing by two fluid passages and one second seal element again, its working principle is with the valve among the valve among aforementioned Figure 15 600 and Figure 16 700, please refer to aforementioned illustrative explanation, do not repeat them here.
Figure 20 shows that a kind of valve that one embodiment of the invention is related with switching function.It has the valve 800 similar structures shown in Figure 17～shown in Figure 19, and different is the number difference of fluid passage, and the valve 900 of present embodiment has the minimal amount of the fluid passage of this class formation valve, i.e. three fluid passages.Similarly, there is a first fluid port and second fluid port that is arranged on the valve outer surface that directly is communicated with cavity each fluid passage.
Other elements of valve 900 because of similar with valve 800, see also the description about valve 800 as the position of first seal element 930 and second seal element 940 and structure etc., are not described in detail in this.
In order to reduce the suffered pressure of second seal element 940, in working order down, the first fluid port of 950 gatings in the zone of the gating by second seal element, 940 1 sides imported fluid in valve when, the first fluid port of 951 gatings in doab by second seal element, 940 opposite sides also imported fluid in valve simultaneously.For example, under working state as shown in figure 20, gating zone 950 gatings first fluid port 911b and 911c, when passing through first fluid port 911b when gating zone 950 imports fluids, the while also imports fluid by the first fluid port 911a of 951 gatings in doab in zone 951.Like this, the pressure that second seal element 940 bears is the pressure difference of fluid in this two zone 950 and 951, and when the pressure of these two kinds of fluids was identical, the pressure that second seal element 940 bears can be ignored, and is zero under desirable state.Therefore, even the pressure of the fluid that imports in valve by first fluid port 911b is up to 50bar, 100bar or higher, the pressure that second seal element 940 is born also can be very small, and the pressure that second seal element 940 is born can be avoided the influence of the absolute pressure of fluid.
The valve with sampling/switching function related to the embodiment of the invention, its first fluid setting of ports is not limited to aforementioned described.First fluid port space set is fluid output and fluid inlet, so that following in working order of at least one zone is simultaneously to having one or more fluid outputs and fluid inlet.For instance, the first fluid port can be arranged on a side of spool vertically and one to one the first fluid port is made as fluid output and fluid inlet; Perhaps a pair of two ground are made as fluid output and fluid inlet with the first fluid port; Perhaps two pairs one ground are made as fluid output and fluid inlet with the first fluid port; Or the like alternate manner.Generally speaking, first fluid setting of ports mode is decided according to actual demand.Fluid output and fluid inlet are communicated with one to one if desired, then one to one the first fluid port are made as fluid output and fluid inlet.The interior fluid of fluid inlet flows out from two fluid outputs if desired, and then two pairs one ground are made as fluid output and fluid inlet with the first fluid port.
The valve that the embodiment of the invention is related, no matter be the aforesaid valve that has the valve of gating function or have sampling/switching function, the structure that other also can be arranged is such as the valve of the various structures of claimant described in the same day denomination of invention of submitting to Patent Office of the People's Republic of China another Chinese patent application that is valve.The valve of the various structures described in this another patent application also is specific embodiments of the invention.
To second seal element of the related valve of the embodiment of the invention, it can be the element that any has sealing function and can be partitioned into several mutual disconnected zones in the space of valve body and valve core chamber of the prior art.Substantially, the sealing element can be divided into two types, a kind of is to make the space of valve body and valve core chamber be divided into two zones vertically, another kind be make the zone of valve body and valve core chamber be divided into a local zonule and another in poppet shaft to coconnected big zone.The seal ring of last type second seal element as being provided with around spool, a zone needs two such seal elements to define, and this zone is around spool; The seal element that the back is one type is as around one or more fluid ports but the seal ring that is not provided with around spool, and a distinct area only needs such seal element to define.Second seal element that the back is one type also can directly form the internal surface of cavity by valve body and the outer surface of spool realizes that by directly contacting the mode that forms hard sealing the sealing mode please refer to another patent application of aforesaid claimant, is not described in detail in this.As second seal element is a plurality of, a kind of seal element or all employing a kind of seal element in back or combinations of these two kinds of sealing means before can all adopting.
Concerning the related valve of the embodiment of the invention, first fluid port on the valve body can be fluid inlet or fluid output, as then fluid sample being input in the corresponding region, as then fluid sample in the corresponding region or sample mixture being discharged to the outside corresponding device of valve by the fluid passage of correspondence for fluid output by the fluid passage of correspondence for fluid inlet.The first fluid port can be arranged randomly or regularly.And the number of first fluid port and pairing fluid passage thereof is not limit, as 3,4,5,6,7,8,12,16,20,32,40 etc.Accordingly, second seal element also can be provided with one or more.
It is one whole or removably be formed by connecting by at least two unit valve bodies that the valve that the embodiment of the invention is related, its valve body can be one of the forming, and it is one whole or removably be formed by connecting by at least two unit spools that its spool also can be one of the forming.For the described valve that can freely assemble of Fig. 7, be an example, other related various valves of the embodiment of the invention also can adopt by one or more unit valve body, unit spool and freely assemble.Like this, can increase or reduce the fluid passage by the quantity that increases or reduce unit valve body, unit spool, thereby adjust the number of fluid passage very easily, as from a fluid passage, 6 fluid passages to 12, or the like.
The valve related to the embodiment of the invention, if spool moves spirally vertically or pivots, this cavity is a cylindrical cavity preferably; It is circular that the part spool that is provided with second seal element also is preferably, and the shape of other parts of spool is not limit; The maximum radial dimension of spool is slightly less than the smallest radial size of cavity.
If spool is done the straight line type motion vertically, this moment, cavity and spool can be circle or ellipse or triangle or polygonal or other shapes that matches at the radial cross-section of the part that is provided with second seal element; Spool is not provided with the radial cross-sectional shape of the part of second seal element and does not limit; On the same direction, the maximum radial dimension of spool is slightly less than the smallest radial size of cavity.
For the related valve of the embodiment of the invention, that the profile of valve body can be is cylindrical, the combination of cuboid shape, taper shape, prismatic or other shapes or these shapes, as long as its outer surface is suitable for being provided with fluid port and these fluid ports are easy to be communicated with directly or indirectly with external means and whole valve body is suitable for being provided with the fluid passage.
Concerning the related valve of the embodiment of the invention, it is applicable to various fluids, as various liquid, gas, and the fluid that contains solid particle.In working order down, corresponding respectively at least one the first fluid port in pairing two zones of each second seal element is to import to the fluid in the external means of correspondence in these two zones.Thereby in the time of in fluid is directed to these zones, the fluid pressure differential of each second seal element both sides will be less than the hydrodynamic pressure of at least one side of this second seal element.The fluid that is directed in these two zones can be with a kind of fluid or fluid not of the same race, can have identical pressure or different pressure.
The pressure of described fluid can be normal pressure or high pressure.The related valve of the embodiment of the invention is especially applicable to the fluid of high pressure.For example, the hydrodynamic pressure in the valve body is greater than 25bar, perhaps greater than 30bar, or greater than 35bar, or greater than 40bar, or greater than 45bar, or greater than 50bar, or greater than 55bar, or greater than 60bar, or greater than 65bar, or greater than 70bar, or greater than 80bar, or greater than 90bar.
The related valve of the embodiment of the invention is when being applicable to the fluid of high pressure, and the pressure difference in pairing two zones of second seal element preferably remains in the small range.For example, this pressure difference is preferably in the 15bar, perhaps in 12bar, perhaps in 10bar, perhaps in 8bar, perhaps in 6bar, perhaps in 5bar, perhaps in 4bar, perhaps in 3bar, perhaps in 3bar, perhaps in 1bar, perhaps in 0.5bar, perhaps in 0.2bar, perhaps in 0.1bar.Under some situation, compare this pressure difference or even negligible with the hydrodynamic pressure of the second seal element either side.
In one embodiment, when one or more hydrodynamic pressures greater than the fluid of 20bar when one or more external meanss are directed in the valve, the fluid pressure differential of these second seal element both sides is less than 5bar.
In another embodiment, when one or more hydrodynamic pressures greater than the fluid of 40bar when one or more external meanss are directed in the valve, the fluid pressure differential of these second seal element both sides is less than 10bar.
The related valve of the embodiment of the invention can be used in arbitrary temperature environment between room temperature to 220 ℃.Certainly, in actual use, the temperature and pressure that valve was suitable for also can surpass above scope, but may have adverse influence to the performance and/or the life-span of valve.
Concerning the related valve of the embodiment of the invention, spool can be made by material identical or inequality with valve body.Consider that based on factors such as the temperature and pressure of the characteristic of fluid, fluid, manufacture costs spool and valve body can be made by metallic material such as cast iron, stainless steel, alloys; Seal element can be made by the materials such as KALREZ of teflon (PFFE), fluorine rubber (FKM), FFKM (FFKM), buna nitrile (Buna Nitrile), E.I.Du Pont Company, perhaps, the surface of seal element is made by the materials such as KALREZ of teflon (PFFE), fluorine rubber (FKM), FFKM (FFKM), buna nitrile (BunaNitrile), E.I.Du Pont Company, is filled with metal element such as flexible steel wire in it.
Preamble is realized its function to the motion that the description of the related valve of the embodiment of the invention is primarily aimed at by the relative valve body of spool.In fact, the related valve of the embodiment of the invention also can move simultaneously by the relative valve core movement of valve body or valve body and spool and realize its function, and it only is technical simple replacement, therefore no longer describes in detail.
Compared with prior art, the valve arrangement that the embodiment of the invention provides is simple relatively, does not need complicated seal element can realize the better seal performance.In working order down, fluid is directed to respectively in the zone on the second seal element both sides, and the pressure that second seal element is born is pressure poor of the two regional inner fluids that the sealing element is partitioned into.Therefore, be the pressure that may command second seal element bears by the pressure difference of controlling this two regional inner fluid, therefore the pressure that second seal element bears avoid the influence of the absolute pressure of two regional inner fluids.Simultaneously, because of second seal element has defined a gating district that seals, alignment request is reduced between fluid port is as long as fluid port enters gating district fluid and can circulate between different port.Therefore, these valves are suitable for using under high-pressure working condition, and have reliable sealing performance, can avoid each interregional, and avoid the connection dislocation between gating port and fluid inlet because of poorly sealed gating fluid that causes and not scurrying mutually or leaking between the gating fluid.
In addition, these zones have covered the whole outer surfaces of spool in cavity, and then make in fluid is enclosed in the spool in the cavity, the fluid thrust that spool is subjected on side face can be cancelled each other, and the fluid thrust that is subjected on the end face because of face area limited and spool axial dimension limited to the spool influence greatly.Therefore, avoided spool to be promoted effectively by high-pressure liquid and make valve core outer surface break away from valve interior surface may, and then avoided interregional fluid to go here and there mutually, closely cooperating of valve body and valve core chamber is achieved.
Related description in the above-mentioned embodiment that exemplifies, for example and data only as demonstrating and the usefulness of illustration, and non-limiting scope of the present invention.Any insubstantial modifications processing of being done according to the present invention all falls in the claim scope of the present invention.Therefore, the spirit and scope of annex claims are not limited to the explanation version of the application to this invention.
Claims (20)
1. valve comprises:
Valve body, its inside is provided with a cavity, also be provided with a plurality of fluid passages on the described valve body, described cavity has an opening at an end of valve body, each described fluid passage includes the first fluid port and second fluid port, wherein said first fluid port is communicated with described cavity, and described second fluid port is used for being connected with external means;
Spool, its can be described relatively the valve body motion, and described valve body and described valve core chamber are formed with a space in described cavity;
First seal element is used to prevent the opening leakage of the interior fluid of valve body from described cavity;
It is characterized in that: described valve also comprises one or more second seal elements, described second seal element is separated out several zones in described space, fluid can be imported by at least one first fluid port in each described zone in it, thereby the fluid pressure differential of each second seal element both sides is less than the hydrodynamic pressure of at least one side of this second seal element.
2. valve as claimed in claim 1 is characterized in that: when one or more hydrodynamic pressures when the fluid of 20bar is in one or more external meanss are directed to described valve, the fluid pressure differential of the described second seal element both sides is less than 5bar.
3. valve as claimed in claim 1 is characterized in that: when one or more hydrodynamic pressures when the fluid of 40bar is in one or more external meanss are directed to described valve, the fluid pressure differential of the described second seal element both sides is less than 10bar.
4. valve as claimed in claim 1 is characterized in that: be provided with a fluid passage in the described spool, the fluid in the gating zone can be transmitted in described fluid passage.
5. valve as claimed in claim 4, it is characterized in that: described spool can move by described relatively valve body, described gating zone and then can at least one described first fluid port of gating, and by the described fluid passage transmission in the spool by the fluid in the described first fluid port of gating.
6. valve as claimed in claim 5 is characterized in that: the described fluid passage in the described spool will be transferred to outside the described valve by the fluid in the described first fluid port of gating.
7. valve as claimed in claim 5 is characterized in that: the described fluid passage in the described spool will be transferred to outside the described valve by at least one the described fluid passage on the described valve body by the fluid in the described first fluid port of gating.
8. valve as claimed in claim 1, it is characterized in that: described spool can move with two described first fluid ports of while gating by described relatively valve body at least, one of them described first fluid port imports to fluid in the zone, and described first fluid port fluid in will this described zone is derived.
9. valve as claimed in claim 1 is characterized in that: be provided with a fluid passage in the described spool, have a zone to include the subregion that the described fluid passage in described spool is communicated with in the described zone.
10. valve as claimed in claim 9, it is characterized in that: described spool can move by described relatively valve body, described subregion and then can be with at least one described first fluid port gating, and another described subregion can be with another described first fluid port gating at least.
11. valve as claimed in claim 1 is characterized in that: be provided with a fluid passage in the described valve body, have a zone to include the subregion that this described fluid passage in described valve body is communicated with in the described zone.
12. valve as claimed in claim 11, it is characterized in that: described spool can move by described relatively valve body, described subregion and then can be with at least one described first fluid port gating, and another described subregion can be with another described first fluid port gating at least.
13. as the described valve of one of claim 1-12, it is characterized in that: described valve body includes a plurality of unit valve body, and described unit valve body can be disassembled and assemble to adjust the quantity of fluid passage on the described valve body.
14. valve as claimed in claim 1 is characterized in that: at least one described second seal arrangement is around described spool setting.
15. valve as claimed in claim 1 is characterized in that: at least one described second seal arrangement is provided with around one or more described first fluid ports, but not around described spool.
16. the method for a fluid of gating from a plurality of fluid origins may further comprise the steps:
A kind of valve is provided, described valve comprises valve body, spool and a plurality of seal element, described valve body and valve core chamber are formed with a space, also have a plurality of fluid input channels to be used for the fluid in external fluid source is input in this space on the described valve body, described spool comprises a fluid passage, and described seal element is separated out several zones in described space;
Locate the position of described spool, so that fluid can be imported by at least one fluid input channel in each described zone in it, thereby the fluid pressure differential of each second seal element both sides is less than the hydrodynamic pressure of at least one side of this second seal element;
Fluid at least one selection area is exported to outside the valve by the fluid passage on the spool.
17. method as claimed in claim 16 is characterized in that: described valve body also comprises at least one fluid output channel, and described method also comprises the fluid in the selection area is not outputed to outside the valve by at least one fluid output channel.
18. method as claimed in claim 16, it is characterized in that: when one or more hydrodynamic pressures greater than the fluid of 20bar when one or more external meanss are directed in the described valve by the fluid input channel, the fluid pressure differential of these second seal element both sides is less than 5bar.
19. method as claimed in claim 16, it is characterized in that: when one or more hydrodynamic pressures greater than the fluid of 40bar when one or more external meanss are directed in the described valve by the fluid input channel, the fluid pressure differential of these second seal element both sides is less than 10bar.
20. a method that changes direction of flow may further comprise the steps:
A kind of valve is provided, described valve comprises valve body, spool and a plurality of seal element, described valve body and valve core chamber are formed with a space, described seal element is separated out several zones in described space, also have a plurality of fluid input channels to be used for the fluid in external fluid source is input in this space on the described valve body, and also have at least one fluid output channel to be used to export fluid in this space on the described valve body;
Locate the position of described spool, so that fluid can be imported by at least one fluid input channel in each described zone in it, fluid at least one zone can output to outside the valve by at least one fluid output channel, thereby the fluid pressure differential of each second seal element both sides is less than the hydrodynamic pressure of at least one side of this second seal element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101623739A CN101173717B (en) | 2006-09-28 | 2007-09-28 | Valve and method for using the same |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610159723.1 | 2006-09-28 | ||
| CN200610159723 | 2006-09-28 | ||
| CN2007101623739A CN101173717B (en) | 2006-09-28 | 2007-09-28 | Valve and method for using the same |
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| Publication Number | Publication Date |
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| CN101173717A true CN101173717A (en) | 2008-05-07 |
| CN101173717B CN101173717B (en) | 2010-06-09 |
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| CN2007101623739A Expired - Fee Related CN101173717B (en) | 2006-09-28 | 2007-09-28 | Valve and method for using the same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374798A (en) * | 2018-10-16 | 2019-02-22 | 安徽皖仪科技股份有限公司 | Multi-tube composite sampling valve and its application method |
| CN110735946A (en) * | 2018-07-18 | 2020-01-31 | 日本恒温器株式会社 | Cold and hot water mixing valve |
| CN113007436A (en) * | 2021-03-02 | 2021-06-22 | 深圳市和来生物技术有限公司 | Power conveying mechanism with multiple power channels and micro-fluidic chip |
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| CN2120334U (en) * | 1992-04-11 | 1992-10-28 | 黄祺良 | Quantitative sampling valve |
| JPH10132105A (en) * | 1996-10-28 | 1998-05-22 | Smc Corp | Pilot type five port directional control valve |
| CN2335950Y (en) * | 1997-07-21 | 1999-09-01 | 何志伟 | Differential pressure transducer program valve |
| JP3468457B2 (en) * | 1999-07-14 | 2003-11-17 | Ｓｍｃ株式会社 | Switching valve with position detection function |
| JP3696075B2 (en) * | 2000-10-06 | 2005-09-14 | Ｓｍｃ株式会社 | Switching valve with magnetic sensor |
| JP2004301164A (en) * | 2003-03-28 | 2004-10-28 | Smc Corp | Pilot type selector valve device and switching method for pilot type selector valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735946A (en) * | 2018-07-18 | 2020-01-31 | 日本恒温器株式会社 | Cold and hot water mixing valve |
| CN109374798A (en) * | 2018-10-16 | 2019-02-22 | 安徽皖仪科技股份有限公司 | Multi-tube composite sampling valve and its application method |
| CN113007436A (en) * | 2021-03-02 | 2021-06-22 | 深圳市和来生物技术有限公司 | Power conveying mechanism with multiple power channels and micro-fluidic chip |
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|---|---|
| CN101173717B (en) | 2010-06-09 |
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