CN1207165A - Flow valve operated by flow transfer means which regulate small flows of control - Google Patents
Flow valve operated by flow transfer means which regulate small flows of control Download PDFInfo
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- CN1207165A CN1207165A CN 97191290 CN97191290A CN1207165A CN 1207165 A CN1207165 A CN 1207165A CN 97191290 CN97191290 CN 97191290 CN 97191290 A CN97191290 A CN 97191290A CN 1207165 A CN1207165 A CN 1207165A
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Abstract
The valve of the invention basically consists in a rigid valve body with a flow inlet opening and one flow outlet which are oriented in a substantially cross way to said inlet opening. The body of the valve has a main cavity between the flow inlet and the outlet with a valve seat in the limit of the main cavity and the flow inlet. In addition, the body of the valve has one or more ducts for the control flow inlet, and one or more ducts for the outlet of the same which are associated with the control flow transfer means of the valve. These inlet ducts of control flow may be supplied from a network which is independent from the main flow. The valve has an elastomeric body in charge of regulating the flow by its opening or closing, depending on the difference of pressure between its walls. The elastomeric body is located inside the main cavity of the valve, said elastomeric body being hollow and opened in one of its axial ends. This elastomeric body is made up of at least two coaxial zones: one sealing zone, and one second zone of radial sealing.
Description
The present invention relates to the Flow valve of a kind of fluid delivery system operation, this device is regulated micro-control flows, so that produce pressure reduction in piston seal wall both sides, enables moving axially with contacting between the valve seat closed position away from the valve seat enable possition.
In the Flow valve that pressured difference of a great variety is handled, there is following patent documentation to describe: people's such as E.J.Hunter US No.2,980,385; The US No.3 of P.J.Scaglione, 493,008 and the application for patent US No.08/545 of the former inventor S.Perez of this valve, 890.
The patent US No.2 of Hunter, 980,385 disclose a kind of basic hemisphere contractibility membrance valve that is, and membranous wall is quite thick, so that this film can not export by choking flow when its reentrant part pressure is very high.On the contrary, blocked up can the preventing of wall had the opposite effect before small pressure reduction, thereby valve forever cuts out or discharged micro-liquid stream, can be when the small unlatching of control valve, and discharge required fluid.
The patent US No.3 of Scaglione, 493,008 disclose a kind of active element valve, are made up of dish type ring and the telescopic bellows of metallic seal.Pressure reduction is born in metal flexible bellows working surface both sides, in case when interior pressure is higher than external pressure, just deformable, this forces bellows structure when high-pressure work, and its wall will have bigger resistivity, therefore before the pressure minor variations, the valve of low sensitivity be arranged.On the other hand, the dish type cup is rigidity substantially, and is poorly sealed when the pipeline fluid has impurity, influences valve seat usefulness.In addition, because the structure of valve causes sizable load loss.
At present, the valve of most of pressured differential works, because the load loss is very big, make structure very complicated, and concerning the pipeline hydrodynamic pressure, some versatilities are arranged, that is to say that these valves should design like this, promptly before loine pressure has big change, fluid is controlled at pressure almost near scope, gives full play to its efficient.
The application for patent US No.08/545 of Perez, 890 propose a kind of differential type valve, and slight pressure is changed very sensitivity, can bear huge working pressure again, and this just might make structure very simple, adopts less part.This differential valve is the rigidity valve body, and an inflow entrance and an outflow opening are arranged, and the latter presses the mode of intersecting substantially, towards above-mentioned inlet.Be under main chamber and the inflow entrance limit case at valve seat, between outflow opening and the inflow entrance, valve body has a main chamber.In addition, valve body has the control flows outlet conduit, links with the control flows feedway of valve.Valve has an elastomer, is positioned at valve master chamber, and above-mentioned elastomer is hollow, and one of its axial end opening, the other end then have center hole.This center hole can make the control flows inlet turn to cavity, and this fluid properties is the same with the fluid that valve is operated in the pipe network.
Although this up-to-the-minute valve is very general, simple in structure, but still can not use the control flows different with pipe network, and this control flows is with regard to automatic controller, and it is necessary perhaps must controlling in the equipment of big flow by small-signal.The present invention has some parts, at application US No.08/5e5, also has in 890, but identical, set control flows inlet device and pipe network main flow are irrelevant, thereby the valve operation dynamic characteristic that obtains is complete different with the dynamic characteristic of now using valve.So, with application for patent US No.08/545,890 compare, valve of the present invention can be regulated the inlet control flows better, because the former can not change flow, this is owing to be positioned at due to hole cross section on the elastomeric seal wall immobilizes.On the other hand, this valve can be from the external control to the inlet pipe or the control flows of control flows pipeline change.
Valve base of the present invention originally is the rigidity valve body, and an inflow entrance and an outflow opening are arranged, and the latter presses the mode of intersecting substantially, towards above-mentioned inlet.Be under main chamber and the inflow entrance limit case at valve seat, between outflow opening and the inflow entrance, valve body has a main chamber.In addition, valve body has one or more control flows inlet pipe and one or more control flows outlet conduit, and the control flows feedway of this pipeline and valve links.These control flows inlet pipes and different in kind can use in the fluid of main flow.Equally, the control flows outlet conduit can discharge and the irrelevant pipe network fluid of main flow.
Valve has an elastomer, is responsible for making the wall distortion according to the fluid delivery system of control flow rate, and the middle pressure reduction that produces carries out switch, regulates flow.Elastomer is positioned at valve master chamber, and above-mentioned elastomer is hollow, and one of its axial end opening, this elastomer comprise two coaxial districts at least: a seal area, another is the radial seal district.Elastomeric these districts carry out specific function, thereby avoid adding independent part when valve is operated, make valve arrangement complicated, and increase manufacture cost.
In order to understand the present invention better, now the present invention is described according to the following drawings.
Fig. 1 is the valve of the present invention first pattern elevation cross-sectional view in off position,
Fig. 2 is identical with Fig. 1, but valve is in opening state,
Fig. 3 is the valve of the present invention second pattern elevation cross-sectional view in off position,
Fig. 4 is identical with Fig. 3, but valve is in opening state,
Fig. 5 is a valve of the present invention three-mode elevation cross-sectional view in off position,
Fig. 6 is identical with Fig. 5, but valve is in opening state,
Fig. 7 is a valve of the present invention four-mode elevation cross-sectional view in off position,
Fig. 8 is identical with Fig. 7, but valve is in opening state,
Fig. 9 is valve of the present invention the 5th a pattern elevation cross-sectional view in off position,
Figure 10 is identical with Fig. 9, but valve is in opening state.
Fig. 1 and Fig. 2 are the present invention's first pattern, and valve 1.1 is made up of valve body 2.1, and inflow entrance 4.1 and outflow opening 6.1 are arranged, and the latter presses the mode of intersecting substantially, towards above-mentioned inflow entrance 4.1.
Valve body has valve seat 8.1 in above-mentioned inflow entrance 4.1.Between inflow entrance 4.1 and outflow opening 6.1, valve body 2.1 has a constant cross-section master chamber 10.1, is most cylindrical, and is coaxial towards inflow entrance 4.1.In these 10.1 districts, main chamber an annular those widened sections 12.1 is arranged, communicate with outflow opening 6.1 on the valve seat 8.1.On the other hand, main chamber 10.1 is communicated with one or more control flows inlet 14.1 and one or more control flows outlet 16.1 in the far field of outflow opening.Supply with inlet or control flows inlet 14.1, can be by transporting the pipeline of micro fluid, directly from inflow entrance, otherwise by another point of pipe network, otherwise by the special control pipe network that is provided with for this reason.Equally, outlet or control flows outlet 16.1 can directly be discharged to outflow opening 6.1, otherwise arrive control flows discharging pipe network, and especially this situation, chemistry that promptly has or physical property are different from the main net fluid properties of valve 1.1 operations.
Control flows inlet 14.1 and control flows outlet 16.1 all link with traditional control valve, thereby can preestablish control flows, and the sensitivity of modulating valve 1.1 now is described as follows.
Valve 1.1 has an elastomer 20.1, and is hollow, the upper bed-plate opening, though area can vertically change, constant cross-section still is even geometrical shape.This elastomer 20.1 is preferably cylindrical, is positioned at valve body 2.1 main chambeies 10.1, compression is a little axially arranged, so that pressure is acted on the valve seat 8.1.In this pattern, elastomer 20.1 is made up of three coaxial districts: first seal area, 22.1, the second wall districts 24.1 and the 3rd radial portion 26.1.
Seal area 22.1 is positioned at elastomer 20.1 lower bottom bases, form by quite thick block, its cross section is slightly less than 10.1 cross sections, main chamber, highly then less times greater than above-mentioned main chamber 10.1 annular those widened sections 12.1 height, so that it is significantly recessed that sealing district 22.1 is not had before working pressure vertically.Seal area 22.1 lower surface cross sections are less times greater than valve seat 8.1 cross sections, and this upper surface cross section, district then is equal to or greater than lower surface.
Wall district 24.1 is positioned at elastomer 20.1 shell intermediate portions, is made up of quite thin wall section, and its cross section is under 10.1 cross sections, main chamber, and this wall section has the tendency of the distortion of radially bending, and transmits axial stress before 10.1 inside, above-mentioned main chamber are under pressure.
Radial seal district 26.1 acts on main chamber 10.1 sidewalls, forms the upper bed-plate part that elastomer 20.1 has opening.This radial seal district 26.1 is made up of wall section, and its thickness is greater than the thickness in wall district 24.1, and in this district, its outer surface geometrical shape is surperficial identical with main chamber 10.1, so its cross section and 10.1 cross sections, above-mentioned main chamber are very tight.
Fig. 1 is the valve 1.1 of closed condition.In this case, when loading onto elastomer 20.1, wall district 24.1 and radial seal district 26.1 thereof cover main chamber 10.1, form valve chamber 11.1, and,, make valve seat 8.1 form sealing by above-mentioned elastomer 20.1 seal areas 22.1 beginning because its (wall district 24.1) casing wall applies axial pressure, this is because with respect to main chamber 10.1 height, the result that axial dimension is excessive.
When valve 1.1 cuts out, fluid is from control flows inlet 14.1 valve chamber 11.1 of gushing out, if control flows outlet 16.1 (is for example blocked, traditional control valve of not describing by this paper), control flows pressure then produces composite force, make elastomer 20.1 seal areas 22.1 compress valve seat 8.1, because above-mentioned valve chamber 11.1 cross sections are greater than valve seat 8.1 cross sections, so the sealing of valve is enhanced.
When fluid because of valve chamber 11.1 pressure restraining, and when discharging by control flows outlet 16.1 (for example, because the control valve that this paper does not describe is opened), with respect to the main flow pressure that acts on elastomer 20.1 seal areas 22.1 downsides, make valve chamber 11.1 produce control flows pressure and fall.Elastomer 20.1 seal areas 22.1 outer working surface hydrodynamic pressures are big-send-produce synthesis of the axial force from inflow entrance 4.1, hydrodynamic reciprocating sealing district 22.1 makes it to lift off a seat 8.1, and wall district 24.1 is recessed, just produce bigger axial restoring force, certainly will overcome active force from inflow entrance 4.1 hydrodynamic pressures.In this case, along with elastomer 20.1 parts are recessed, and away from valve seat 8.1, like this, fluid can free flow to outflow opening 6.1 from inflow entrance 4.1, as shown in Figure 2.
In Fig. 2, the valve 1.1 of the present invention's first pattern is in opening state.In this case, because wall district 24.1 is recessed, and valve chamber 11.1 volumes are dwindled.According to the fluid that control valve outlet 16.1 is carried, valve chamber 11.1 pressure can change, and therefore, seal area 22.1 also changes at interval with valve seat 8.1, thereby changes valve 1.1 switch degree.Make the switch and the adjustment validity of valve higher like this, consumed energy still less.
When control flows exports 16.1 all or part of closing, a large amount of fluids begin to enter valve chamber 11.1 from control flows inlet 14.1, so fluid volume increases, seal area 22.1 descends, and moves this district, more near valve seat 8.1, like this, if control flows outlet 16.1 is blocked, then dwindle the cross section of inflow entrance 4.1, till closing to outflow opening 6.1 free fluid passages.
Although in described first pattern, elastomer 20.1 radial seal districts can axially freely shift out above-mentioned main chamber in 26.1 ends, also can imagine a scheme of valve, 26.1 ends, wherein above-mentioned radial seal district are fixed on 10.1 walls of valve body 2.1 main chambeies, for example, be fixed in the 10.1 respective annular grooves of above-mentioned main chamber by the annular protuberance on bead moulding or above-mentioned radial seal district 26.1 outer walls.
In the pattern below the present invention, it is all the same that Ref. No. is all counted on the decimal point left side, points out components identical of the present invention.The numbering of the described pattern of numeral on decimal point the right.So, the Ref. No. 20.1 expressions first mode elastic body, 20.2 then represent the elastomer of second pattern.
Fig. 3 and Fig. 4 represent that respectively the present invention is in second pattern of closing with the enable possition.This pattern is described first mode scheme of Fig. 1 and Fig. 2, but a pressure spring 30.2 is arranged in the valve chamber 11.2, compression gently between valve body 2.2 main chamber 10.2 upper surfaces and seal area 22.2 upper surfaces at first.This pressure spring 30.2 can make valve be used for big pressure fluid pipe network.Relevant elements and operation thereof are described with just the same about the present invention's first pattern illustration.
Be similar to the described general rule of the first pattern situation to a certain extent, also can imagine a scheme of valve 1.2, wherein 26.2 ends, radial seal district are fixed on 10.2 walls of valve body 2.2 main chambeies, for example are fixed in the 10.2 respective annular grooves of above-mentioned main chamber by the annular protuberance on bead moulding or above-mentioned radial seal district 26.2 outer walls.
So far, having imagined has various patterns, and flexible body 20.x in the valve wherein of the present invention can move fully vertically, otherwise just be fixed up, and makes the wall of radial seal district 26.x and valve body 2.x master chamber 10.x become overall structure.In addition, also can imagine the compression ring 30.x that packs at valve chamber 11.x.
In the three-mode of valve of the present invention, as shown in Figure 5 and Figure 6, compare with preceding surface model, needn't search together, two species diversity are just arranged, these differences are that elastomer does not have wall district (in some other pattern, Ref. No. 24.x) and activity axial stem substantially.
Before described, this pattern is equipped with fixedly axial stem, can move relative to valve body, the bottom is fixed on the elastomeric seal district, as the guidance of elastomer displacement.The motion bar free end can be handled other devices when valve body is protruding, otherwise just from peripheral operation, so that the elastomeric displacement of control valve.
Valve 1.3 is made up of valve body 2.3, and inflow entrance 4.3 and outflow opening 6.3 are arranged, and the latter presses the mode of intersecting substantially, towards above-mentioned inflow entrance 4.3.
In the valve body 2.3 above-mentioned inflow entrances 4.3 valve seat 8.3 is arranged.Between inflow entrance 4.3 and outflow opening 6.3, valve body 2.3 has a constant cross-section master chamber 10.3, and is preferably cylindrical, coaxial towards inflow entrance 4.3.In these 10.3 districts, main chamber an annular those widened sections 12.3 is arranged, communicate with the outflow opening 6.3 on the valve seat 8.3, on the other hand, main chamber 10.3 is communicated with one or more control flows inlet 14.3 and one or more control flows outlet 16.3 in the far field of outflow opening 6.3.In the far field of this inflow entrance 4.3, also have a hole 7.3 on the valve body 2.3, there are activity axial stem 32.3 free ends to pass, this bar stretches out valve body 2.3 outsides, and above-mentioned hole 7.3 can be accomplished fully, for example by seal ring, guarantees the water tightness of surrounding fluid.
Supply with the control flows inlet or enter the mouth 14.3, can be by transporting the pipeline of micro fluid, directly from inflow entrance 4.3, otherwise by another point of pipe network, otherwise by the special control pipe network that is provided with for this reason.Equally, control flows exports or exports 16.3 and can directly be discharged to outflow opening 6.3, otherwise arrives control flows discharging pipe network, and especially this situation, chemistry that promptly has or physical property are different from the main net fluid properties of valve 1.3 operations.
Valve 1.3 has an elastomer 20.3, hollow, the upper bed-plate opening, its constant cross-section is even geometrical shape, and is preferably cylindrical, is positioned at main chamber 10.3, between above-mentioned elastomer and valve body 2.3 main chambeies 10.3 upper walls, also have an inaccessible pressure spring 30.3,, thereby elastomer 20.3 base pressure are acted on the valve seat 8.3 so that this spring 30.3 is axially having compression a little.In main chamber 10.3, the elastomer 20.3 that valve chamber 11.3 is mounted on wherein forms.
The elastomer 20.3 of this pattern is formed (but, can be made up of three districts that relevant first pattern has been described, in this case, can be if do not establish pressure spring 30.3) by two coaxial districts: first seal area 22.3 and the second radial seal district 26.3.
Seal area 22.3 is positioned at elastomer 20.3 lower bottom bases, form by quite thick block, its cross section is slightly less than 10.3 cross sections, main chamber, highly then less times greater than above-mentioned main chamber 10.3 annular those widened sections 12.3 height, so that it is significantly recessed that sealing district 22.3 is not had before working pressure vertically.Seal area 22.3 lower surface cross sections are less times greater than valve seat 8.3 cross sections, and this upper surface cross section, district then is equal to or greater than lower surface.
Radial seal district 26.3 acts on main chamber 10.3 sidewalls, forms the upper bed-plate part that elastomer 20.3 has opening.
Activity axial stem 32.3 is an overall structure, or is axially fixed on elastomer 20.3 seal areas 22.3 upper walls, and its free end 35.3 stretches out valve body 2.3 outsides, passes hole 7.3.
Fig. 5 represents that valve 1.3 is in closed condition, and entrance pipe (4.3) has fluid, (begins to close from the opening of valves state) when valve 1.3 cuts out should produce by the coefficient composite force of working surface control flows pressure on spring 30.3 and the seal area 22.3.This power is greater than the active force below the seal area 22.3 that causes from inlet 4.3 main flow pressure.Do not changing because seal area 22.3 is not the area on one of both sides, therefore be in closed condition, acting on power bigger above it and should derive from valve chamber 11.3 control flows pressure increments for maintaining valve 1.3.In order to obtain valve chamber 11.3 control flows pressure increments, should take one of following action at least: improve the pressure in the control flows supply pipeline (14.3), or reduce the discharge amount (16.3) of control flows.
In Fig. 6, shown in valve 1.3 be in opening state, at entrance pipe (4.3) and export pipeline (6.3) fluid is arranged all.For valve 1.3 is opened, and keep this state, the power that is applied by spring 30.3 and the coefficient composite force of valve chamber control flows pressure is less than the active force of main flow pressure (from inlet 4.3) below seal area 22.3.In order to obtain the decompression amount of valve chamber 11.3 control flows, to take one of following action at least: reduce the pressure in the control flows supply pipeline (14.3), or improve the discharge amount (16.3) of control flows.
In order to make elastomer 20.3 remove valve seat 8.3, and move axially axial stem 32.3, can reach 1.3 moments of valve equally to open.Because valve chamber 11.3 pressure do not descend, that is to say, the pressure level that this pressure level continues to be in maintaining valve closed condition is the same, therefore, when axial stem 32.3 is unclamped, composite force above the seal area 22.3 will continue greater than the active force of main flow pressure below seal area 22.3, thereby cause elastomer 20.3 to descend.
Fig. 7 and Figure 8 shows that the present invention's four-mode is in respectively and closes and opening state.In this pattern, with respect to valve body, valve is equipped with the activity axial stem, and the bottom is fixed on the elastomeric seal district.Particularly motion bar can make the control flows feedway accomplish, or from the control flows valve chamber that enters the mouth, or exports to control flows from valve chamber again.Motion bar can be used as the guidance of elastomer displacement.The motion bar free end can be handled other devices when valve body is protruding, otherwise just from peripheral operation, so that the elastomeric displacement of control valve.
Be the present invention's four-mode below, be described in detail set motion bar and finish the conveying that control flows exports from the valve chamber to the control flows.Valve 1.4 is made up of valve body 2.4, and inflow entrance 4.4 and outflow opening 6.4 are arranged, and the latter presses the mode of intersecting substantially, towards above-mentioned inflow entrance 4.4.
In the valve body 2.4 above-mentioned inflow entrances 4.4 valve seat 8.4 is arranged.Between inflow entrance 4.4 and outflow opening 6.4, valve body 2.4 has a constant cross-section master chamber 10.4, and is preferably cylindrical, coaxial towards inflow entrance 4.4.In these 10.4 districts, main chamber an annular those widened sections is arranged, communicate with outflow opening 6.4 on the valve seat 8.4.On the other hand, main chamber 10.4 is communicated with one or more control flows inlet 14.4 in the far field of inflow entrance 4.4.In the far field of this inflow entrance 4.4, also have control flows outlet 7.4 on the valve body 2.4, be communicated with auxiliary valve chamber 9.4, can discharge by one or more control flows outlet 16.4.
Supplying with the control flows inlet or enter the mouth 14.4 can be by transporting the pipeline of micro fluid, directly from inflow entrance 4.4, otherwise by another point of pipe network, otherwise by the special control pipe network that is provided with for this reason.Equally, control flows exports or exports 16.4 and can directly be discharged to outflow opening 6.4, otherwise arrives control flows discharging pipe network, and especially this situation, chemistry that promptly has or physical property are different from the main net fluid properties of valve 1.4 operations.
Valve 1.4 has an elastomer 20.4, the constant cross-section of even geometrical shape, and preferably cylindrical, hollow, upper bed-plate opening, this elastomer are positioned at main chamber 10.4, thereby compression is a little axially arranged, and act on the valve seat 8.4 so that exert all one's strength.In main chamber 10.4, behind the elastomer 20.4 of packing into, form valve chamber 11.4.
The elastomer 20.4 of this pattern is made up of three coaxial districts: first seal area, 22.4, the second tenuities 24.4 and the 3rd radial portion 26.4.
Seal area 22.4 is positioned at elastomer 20.4 lower bottom parts, form by quite thick block, its cross section is slightly less than 10.4 cross sections, main chamber, highly then less times greater than above-mentioned main chamber 10.4 annular those widened sections 12.4 height, so that it is significantly recessed that sealing district 22.4 is not had before working pressure vertically.Seal area 22.4 lower surface cross sections are less times greater than valve seat 8.4 cross sections, and this upper surface cross section, district then is equal to or greater than lower surface.
Wall district 24.4 is positioned at elastomer 20.4 shell intermediate portions, and by forming than thin-walled portion, its cross section is under 10.4 cross sections, main chamber, and this wall section has the bending deflection tendency, transmits axial stress before 10.4 inside, above-mentioned main chamber are under pressure.
Radial seal district 26.4 acts on main chamber 10.4 sidewalls, forms the upper bottom portion part that elastomer 20.4 has opening.This radial seal district 26.4 is made up of wall section, and its thickness is greater than the thickness in wall district 24.4, and in this district, its outer surface geometrical shape is surperficial identical with main chamber 10.4, so its cross section and 10.4 cross sections, above-mentioned main chamber are very tight.
In four-mode of the present invention, valve 1.4 is provided with activity axial stem 32.4, be overall structure, or be axially fixed on elastomer 20.4 seal areas 22.4 upper walls, stretch out valve body 2.4 outsides, pass the hole of control flows outlet 7.4 and auxiliary valve chamber 9.4, like this driving end 35.4 of formation activity axial stem 32.4 usefulness.There is seal arrangement at auxiliary valve chamber 9.4 two ends of passing in activity axial stem 32.4, as seal ring, to guarantee water tightness.
Activity axial stem 32.4 has a control flows Flow-rate adjustment section 33.4, its cross section is the axially variable size, it is the same that above-mentioned shape of cross section and control flows export 7.4 hole shapes, thereby make this above-mentioned hole 7.4 of adjusting section 33.4 all or part of obstructions, thereby change the control flows flow of outflow valve chamber 11.4 to auxiliary valve chamber 9.4.
Fig. 7 represents that valve 1.4 is in closed condition, and entrance pipe (4.4) has fluid.(begin to close from the opening of valves state) when valve 1.4 cuts out, should produce valve chamber 11.4 control flows pressure, the power that applies is greater than the active force below the seal area 22.4 that causes from inlet 4.4 main flow pressure.Do not changing because seal area 22.4 is not the area on one of both sides, therefore,, acting on power bigger above it and should derive from valve chamber 11.4 control flows pressure increments for maintaining valve 1.4 is in closed condition.In order to obtain valve chamber 11.4 control flows pressure increments, should take one of following action at least: improve the pressure in the control flows supply pipeline (14.4), or reduce the discharge amount (16.4) of control flows.If activity axial stem 32.4 control flows Flow-rate adjustment sections 33.4 present positions, make its comparatively large cross-sectional area export on 7.4 holes inaccessible in control flows, so, control flows should be discharged to auxiliary valve chamber 9.4 from valve chamber 11.4 than small flow, valve chamber is discharged to control flows outlet 16.4 thus again, improves valve chamber 11.4 pressure like this.In this case, seal area 22.4 continues to compress valve seat 8.4, and whether pipe valve 1.4 does not close at first, if valve 1.4 is opened at first, so, elastomer 20.4 descends, till seal area 22.4 compresses valve seat 8.4.
Fig. 8 represents that valve 1.4 is in opening state, and entrance pipe (4.4) and export pipeline (6.4) all have fluid.For valve 1.4 is opened, and keep above-mentioned state, should produce valve chamber 11.4 control flows pressure, the power that applies is less than the active force below the seal area 22.4 that causes from inlet 4.4 main flow pressure.In order to obtain the decompression amount of valve chamber 11.4 control flows, at least should take one of following action: reduce the pressure in the control flows supply pipeline (14.4), or the discharge amount (16.4) of raising control flows, if activity axial stem 32.4 control flows Flow-rate adjustment sections 33.4 present positions, make its small cross sectional export on 7.4 holes inaccessible in control flows, so, control flows should be discharged to auxiliary valve chamber 9.4 from valve chamber 11.4 than small flow, valve chamber is discharged to control flows outlet 16.4 thus again, thereby reduces valve chamber 11.4 pressure.In this case, elastomer 20.4 rises, till all unclamping valve seat 8.4 seal areas 22.4.
Remove valve seat 8.4 for making elastomer 20.4, and move axially axial stem 32.4, can reach valve 1.4 moments unlatching equally, but this unlatching is not nonvolatil, so valve chamber 11.4 pressure should not descend, the motion bar reason why moment moves that Here it is, so that the area of the cross-section area of Flow-rate adjustment section 33.4 obturations obturation when being slightly less than, being equal to or greater than valve 1.4 and closing.
Fig. 9 and Figure 10 represent that respectively the present invention is in the 5th pattern of closing with the enable possition.In this pattern, valve is identical with four-mode, but elastomer 20.5 only is made up of two coaxial districts: first seal area 22.5 and the second radial seal district 26.5, institute's tool characteristic is described the same with relevant other patterns.
Because the elastomer 20.5 of this pattern lacks the wall district (Ref. No. 24.x) that has in aforementioned some pattern, so its function, is kept closing so that make valve when pipe network does not have fluid by pressure spring 30.5 assurances.This spring 30.5 is contained in 11.5 li of valve chambers, be in slight pressured state between seal area 22.5 upper surfaces and valve body 2.5 main chambeies 10.5 upper surfaces, thereby valve can be used for the pipe network of high-pressure liquid.
The present invention is described according to five best mode, has wherein considered the combination that some part is different.In all patterns, there is the control flows inlet 14.x of a valve body 2.x valve chamber 11.x to be limited in one of end by elastomer 20.x, it is closed or open valve 1.x mainstream channel according to whether contacting with valve seat 8.x.In addition, in all patterns, also have control flows outlet 16.x, can make described fluid discharge valve chamber 11.x.In all cases, control flows inlet 14.x can supply with the same main flow of pipe network (for example by the pipeline that becomes a mandarin from main flow inlet 4.x), otherwise from other stream sources, no matter they adopt similar main flow, or other kinds, also identical with the main flow condition regardless of the fluid physics condition, or condition (pressure, temperature etc.) difference.Equally, control flows outlet 16.x can discharge, no matter be directly to export 6.x (under control flows character and main flow character same case) from main flow, or as to auxiliary pipe network, so that only distribute control flows.
The special circumstances the present invention that should consider is included, and promptly the shared one-pipe that is communicated with valve chamber 11.x of control flows entrance and exit (being respectively 14.x and 16.x) by suitable valve, couples together as three-way valve or the equivalent valve of operation.
In all patterns of the present invention, also have an elastomer 20.x, at least with three can have two in the axial area shared.Two districts of all mode commons: an end is a seal area, and the other end is a radial seal district, in some pattern, tenuity can be arranged, and is positioned in the middle of other districts.
If elastomer 20.x only forms (seal area 22.x and radial seal district 26.x) by two districts, then pressure spring 30.x must be set, so that necessary restoring force is provided, when valve chamber pressure reduces, cause valve closure.Pressure spring 30.x also can reduce the water hammer negative effect that produces in the pipeline, on the contrary, can reduce like this owing to the pressure jump that acts on the outer elastomeric surface, causes fluid to enter, and the escape of liquid that produces.
If tenuity 24.x is arranged among the elastomer 20.x, then valve chamber 11.x can be if do not establish pressure spring 30.x, and the power that applies must make seal area be pressed on the valve seat 8.x.Under afore-mentioned, promptly elastomer 20.x is made up of three axial area, and then this elastomer can be fixed on its radial seal district 26.x or its two ends freely on the valve body 2.1.
Under the free situation of elastomer 20.x radial seal district 26.x, radial seal district internal surface can be cylindrical or prismatic, cut cone (or truncated pyramid) or fall truncated cone (or fall truncated pyramid), this depends on the composite force that valve chamber 11.x internal pressure applies respectively, can not influence the radial seal position moves, be that composite force moves the radial seal district upwards, otherwise it is downward to be that composite force moves the radial seal district.
If the set axial stem 32.x of pattern of the present invention has control flows Flow-rate adjustment section 33.x, then this bar can be taked the comparison rigid manner, or takes replaceable relatively mode, is fixed on the elastomer 20.x seal area 22.x surface.At latter event, axial stem 32.x should assemble like this, during promptly from peripheral operation, this bar moves by the fate at first, and not mobile elastomer 20.x, so that the inaccessible section 33.x that regulates, make the fate face toward control flows outlet 7.x hole, rather than valve is just opened at the beginning, but valve chamber 11.x decompression.Relative replaceable connection between this axial stem 32.x and seal area 22.x for example can realize by the cannelure that is positioned at the bar lower end, should be fixed on after bar passes on the above-mentioned seal area because this connection can have many modes, thus among the figure to the above-mentioned description of not giving.
On the other hand, valve of the present invention can not established axial stem 32.x.If axial stem 32.x is arranged, control flows Flow-rate adjustment section 33.x (seeing pattern 4 and 5) then will be arranged, in this case, valve body 2.x is provided with an auxiliary valve chamber 9.x, and control flows is discharged to control flows outlet 16.x thus.
The arbitrary pattern of the present invention can have auxiliary adjustment and/or control valve, be located on control flows inlet 14.x or the control flows outlet 16.x, or both all is provided with.
Simple and clear scheme of the present invention is that shell is provided with the rigid material coating around the elastomeric seal district, and for example sealed eyelet in the time of can avoiding valve chamber pressure significantly to increase, strengthens above-mentioned seal area cross section.Seal area also has inner reinforcing material, comprising as steel fiber or artificial fiber.
It is that the elastomeric walls district is provided with some thin-walled axial components that the present invention also has a simple and clear scheme, and the valve of Gou Chenging can make Sealing that big displacement is arranged like this, so that control big flow.
Claims (24)
1. the Flow valve of fluid delivery system operation, this device is regulated micro-control flows, so that produce pressure reduction in piston seal wall both sides, it can moved axially away between the enable possition of valve seat and the closed position that contacts valve seat, comprises at least:
A) valve body has:
-inflow entrance;
-valve seat is positioned at above-mentioned inflow entrance inside;
-outflow opening, the basic mode of intersecting of pressing is towards above-mentioned inflow entrance;
The main chamber of-constant cross-section, preferably cylindrical, be arranged between inflow entrance and the outflow opening, coaxial towards inflow entrance;
-annular those widened sections is arranged in above-mentioned chamber, district, communicates with above-mentioned outflow opening on the valve seat;
-one or more inflow entrances are communicated with above-mentioned chamber, are arranged in from the far field of inflow entrance;
-one or more outflow openings are communicated with above-mentioned chamber, are arranged in from the far field of inflow entrance.
B) elastomer of constant cross-section is even geometrical shape, and is preferably cylindrical, and hollow and upper bed-plate opening is positioned at above-mentioned main chamber, is axially being compressed a little, acts on the valve seat thereby exert all one's strength; Elastomer is made up of two coaxial districts at least, that is:
-above-mentioned elastomer first seal area, be positioned at above-mentioned elastomer lower bottom base, be made up of quite thick block, its cross section is slightly less than cross section, main chamber, highly then less times greater than main chamber annular those widened sections height, so that it is significantly recessed that this district is not had before working pressure vertically; The above-mentioned lower bottom base cross section of above-mentioned first seal area is less times greater than the valve seat cross section, and this upper surface cross section, district then is equal to or greater than lower surface:
-above-mentioned elastomer second radial seal the district acts on above-mentioned main chamber sidewall, is positioned at the upper bed-plate part that above-mentioned elastomer has opening, and in this district, its outer surface geometrical shape is identical with surface, main chamber, so its cross section and cross section, above-mentioned main chamber are very tight.
2. according to the Flow valve of claim 1, wherein above-mentioned elastomer has a San Bi district, is positioned at above-mentioned elastomer shell intermediate portion, between above-mentioned first seal area and the above-mentioned second radial seal district; This wall district is made up of quite thin wall section, and its cross section has diastrophic tendency less than cross section, main chamber, transmits axial force before inside, above-mentioned main chamber is under pressure; The above-mentioned second seal area wall thickness is greater than the thickness in above-mentioned San Bi district.
3. according to the Flow valve of claim 2, wherein end, elastomer radial seal district is fixed on the wall of valve body master chamber.
4. according to the Flow valve of claim 2, wherein end, elastomer radial seal district can free move axially along above-mentioned main chamber.
5. according to the Flow valve of claim 2, a compression ring is arranged wherein, be positioned at above-mentioned elastomer, spring one end contacts with the first seal area inwall, and the spring the other end then contacts with valve body master chamber.
6. according to the Flow valve of claim 5, wherein end, elastomer radial seal district is fixed on the wall of valve body master chamber.
7. according to the Flow valve of claim 5, wherein end, elastomer radial seal district can free move axially along above-mentioned main chamber.
8. according to the Flow valve of claim 1, a pressure spring is arranged, be positioned at above-mentioned elastomer, spring one end contacts with the first seal area inwall, and the spring the other end then contacts with valve body master chamber.
9. according to the Flow valve of claim 1, an activity axial stem is arranged, be overall structure, or be axially fixed on the above-mentioned seal area upper wall of elastomer; Above-mentioned bar free end stretches out valve body outside, passes the hole on the far field of inflow entrance; There is suitable device in above-mentioned hole, and O-ring seals for example is to guarantee the water tightness of surrounding fluid.
10. according to the Flow valve of claim 9, wherein above-mentioned elastomer has a San Bi district, is positioned at above-mentioned elastomer shell intermediate portion, between above-mentioned first seal area and the above-mentioned second radial seal district; This wall district is made up of quite thin wall section, and its cross section has diastrophic tendency less than cross section, main chamber, transmits axial force before inside, above-mentioned main chamber is under pressure; The above-mentioned second seal area wall thickness is greater than the thickness in above-mentioned San Bi district.
11. according to the Flow valve of claim 10, wherein end, elastomer radial seal district is fixed on the wall of valve body master chamber.
12. according to the Flow valve of claim 10, wherein end, elastomer radial seal district can free move axially along above-mentioned main chamber.
13., a pressure spring is arranged according to the Flow valve of claim 10, be positioned at above-mentioned elastomer, spring one end contacts with the first seal area inwall, and the spring the other end then contacts with valve body master chamber.
14. according to the Flow valve of claim 13, wherein end, elastomer radial seal district is fixed on the wall of valve body master chamber.
15. according to the Flow valve of claim 13, wherein end, elastomer radial seal district can free move axially along above-mentioned main chamber.
16., a pressure spring is arranged according to the Flow valve of claim 9, be positioned at above-mentioned elastomer, spring one end contacts with the first seal area inwall, and the spring the other end then contacts with valve body master chamber.
17. the Flow valve of fluid delivery system control, this device is regulated micro-control flows, so that produce pressure reduction in piston seal wall both sides, is easy to moving axially away between the enable possition of valve seat and the closed position that contacts valve seat, comprises at least:
A) valve body has:
-inflow entrance;
-valve seat is positioned at above-mentioned inflow entrance inside;
-outflow opening, the basic mode of intersecting of pressing is towards above-mentioned inflow entrance;
The main chamber of-constant cross-section, preferably cylindrical, be arranged between above-mentioned inflow entrance and the outflow opening, coaxial towards inflow entrance;
-annular those widened sections is arranged in above-mentioned chamber, district, communicates with above-mentioned outflow opening on the valve seat;
-one or more inflow entrances are communicated with above-mentioned chamber, are arranged in the far field from inflow entrance;
The outlet of-one control flows is positioned at the above-mentioned chamber from the far field of inflow entrance;
-one auxiliary valve chamber communicates with the above-mentioned hole of control flows outlet;
-one or more outflow openings are communicated with above-mentioned intermediate valve chamber;
B) elastomer of constant cross-section is even geometrical shape, and is preferably cylindrical, and hollow and upper bed-plate opening is positioned at above-mentioned main chamber, in that compression is a little axially arranged, acts on the valve seat thereby exert all one's strength; Elastomer is made up of two coaxial districts at least, that is:
-above-mentioned elastomer first seal area, be positioned at above-mentioned elastomer lower bottom base, be made up of quite thick block, its cross section is slightly less than cross section, main chamber, highly then less times greater than main chamber annular those widened sections height, so that it is significantly recessed that this district is not had before working pressure vertically; The above-mentioned lower surface cross section of above-mentioned first seal area is less times greater than the valve seat cross section, and this upper surface cross section, district then is equal to or greater than lower surface;
-above-mentioned elastomer second radial seal the district acts on above-mentioned main chamber sidewall, is positioned at the upper bed-plate part that above-mentioned elastomer has opening, and its outer surface geometrical shape is identical with surface, main chamber, so its cross section and cross section, main chamber are very tight.
C) activity axial stem is overall structure, or is axially fixed on the above-mentioned seal area upper wall of elastomer; Above-mentioned bar free end stretches out the valve body outside, passes the hole of control flows outlet, again by above-mentioned auxiliary valve chamber; Above-mentioned auxiliary valve chamber has appropriate sealing means, and O-ring seals preferably is to guarantee the water tightness of surrounding fluid; Above-mentioned axial motion bar has a control flows Flow-rate adjustment section, and its shape of cross section is the axially variable size, and its shape of cross section is the same with the above-mentioned hole shape of control flows outlet, the above-mentioned cross section of the above-mentioned adjustment hole of all or part of obstruction.
18. according to the Flow valve of claim 17, wherein above-mentioned elastomer has a San Bi district, is positioned at above-mentioned elastomer shell intermediate portion, between above-mentioned first seal area and the above-mentioned second radial seal district; This wall district is made up of quite thin wall section, and its cross section has diastrophic tendency less than cross section, main chamber, transmits axial force before inside, above-mentioned main chamber is under pressure; The above-mentioned second seal area thickness is greater than the thickness in above-mentioned San Bi district.
19. according to the Flow valve of claim 18, wherein end, elastomer radial seal district is fixed on the wall of valve body master chamber.
20. according to the Flow valve of claim 18, wherein end, elastomer radial seal district can free move axially along above-mentioned main chamber.
21., a pressure spring is arranged according to the Flow valve of claim 18, be positioned at above-mentioned elastomer, spring one end contacts with the first seal area inwall, and the spring the other end then contacts with valve body master chamber.
22. according to the Flow valve of claim 21, wherein end, elastomer radial seal district is fixed on the wall of valve body master chamber.
23. according to the Flow valve of claim 21, wherein end, elastomer radial seal district can free move axially along above-mentioned main chamber.
24., a pressure spring is arranged according to the Flow valve of claim 17, be positioned at above-mentioned elastomer, spring one end contacts with the first seal area inwall, and the spring the other end then contacts with valve body master chamber.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97191290 CN1207165A (en) | 1996-11-20 | 1997-11-20 | Flow valve operated by flow transfer means which regulate small flows of control |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/754,257 | 1996-11-20 | ||
| CN 97191290 CN1207165A (en) | 1996-11-20 | 1997-11-20 | Flow valve operated by flow transfer means which regulate small flows of control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1207165A true CN1207165A (en) | 1999-02-03 |
Family
ID=5178877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97191290 Pending CN1207165A (en) | 1996-11-20 | 1997-11-20 | Flow valve operated by flow transfer means which regulate small flows of control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1207165A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101375064B (en) * | 2006-01-30 | 2012-05-23 | 科瓦尔公司 | Vacuum generator |
| CN103307344A (en) * | 2013-06-14 | 2013-09-18 | 江苏大学 | Flow regulating unit capable of achieving flow regulation through pressure sensing control and flow regulating method thereof |
| CN104245153A (en) * | 2012-04-17 | 2014-12-24 | 林德股份公司 | Device and method for a controlled discharge of a fluid |
| CN106763882A (en) * | 2017-03-08 | 2017-05-31 | 齐鲁工业大学 | A kind of adjustable single-sided film flow controller of precompressed |
| CN116906451A (en) * | 2023-09-07 | 2023-10-20 | 山东大学 | Prepressing self-adjusting differential feedback flow controller and static pressure equipment |
-
1997
- 1997-11-20 CN CN 97191290 patent/CN1207165A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101375064B (en) * | 2006-01-30 | 2012-05-23 | 科瓦尔公司 | Vacuum generator |
| CN104245153A (en) * | 2012-04-17 | 2014-12-24 | 林德股份公司 | Device and method for a controlled discharge of a fluid |
| CN103307344A (en) * | 2013-06-14 | 2013-09-18 | 江苏大学 | Flow regulating unit capable of achieving flow regulation through pressure sensing control and flow regulating method thereof |
| CN106763882A (en) * | 2017-03-08 | 2017-05-31 | 齐鲁工业大学 | A kind of adjustable single-sided film flow controller of precompressed |
| CN106763882B (en) * | 2017-03-08 | 2018-12-28 | 齐鲁工业大学 | A kind of adjustable single-sided film flow controller of precompressed |
| CN116906451A (en) * | 2023-09-07 | 2023-10-20 | 山东大学 | Prepressing self-adjusting differential feedback flow controller and static pressure equipment |
| CN116906451B (en) * | 2023-09-07 | 2023-12-05 | 山东大学 | Prepressing self-adjusting differential feedback flow controller and static pressure equipment |
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