CN103201548A - Pressure compensated valve - Google Patents

Pressure compensated valve Download PDF

Info

Publication number
CN103201548A
CN103201548A CN2011800440576A CN201180044057A CN103201548A CN 103201548 A CN103201548 A CN 103201548A CN 2011800440576 A CN2011800440576 A CN 2011800440576A CN 201180044057 A CN201180044057 A CN 201180044057A CN 103201548 A CN103201548 A CN 103201548A
Authority
CN
China
Prior art keywords
piston
valve
pressure
pressure compensation
process fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2011800440576A
Other languages
Chinese (zh)
Other versions
CN103201548B (en
Inventor
R.施图德
S.格尔弗特
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Norgren GmbH
Original Assignee
Norgren GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Norgren GmbH filed Critical Norgren GmbH
Publication of CN103201548A publication Critical patent/CN103201548A/en
Application granted granted Critical
Publication of CN103201548B publication Critical patent/CN103201548B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1223—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being acted upon by the circulating fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/12—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with streamlined valve member around which the fluid flows when the valve is opened
    • F16K1/123—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with streamlined valve member around which the fluid flows when the valve is opened with stationary valve member and moving sleeve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4289—Valve constructions or configurations, e.g. arranged to reduce blowing fluid consumption

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

A valve (200) including a housing (201) and a process fluid supply port (112) formed in the housing (201) to receive a process fluid is provided. The valve (200) includes a piston (202) movable within the housing (201) between an open position and a closed position. The piston (202) includes a first pressure-compensating surface (315) in fluid communication with the process fluid supply port (112) when the piston (202) is in the open position. The piston (202) further includes a second pressure-compensating surface (316) with a first portion (210) in fluid communication with the process fluid supply port (112) when the piston (202) is in the open and the closed position and a second portion (208, 317) in fluid communication with the process fluid supply port (112) when the piston (202) is in the open position.

Description

Pressure-compensated valve
Technical field
The present invention relates to valve, and relate more specifically to improved pressure-compensated valve.
Background technique
Blowing is for the well-known processes that the preforming parts is molded as expected product.Performing member is the general shape that is in pipe, wherein an end be open wide be used for to introduce superheated steam, normally air; But, can use other fluid.A typical types of blowing is stretch-blow (SBM).In SBM used, the valve piece provided low pressure and pressurized gas so that performing member is expand in the mold cavity.Mold cavity comprises the external shape of expected product.SBM can be used in the various application; But, be in the production of PETG (PET) product by the most widely used application, beverage bottle for example.Usually, SBM technology is used low pressure feed and stretching bar, and described stretching bar is inserted in the performing member to stretch this performing member and after this use the high pressure supply that performing member is expand in the mold cavity in a longitudinal direction and radially outwardly.Can use one or more blowing valve control low pressure and high pressure supply.Resulting product is hollow normally, and its profile is consistent with the shape of mold cavity.After this gas in the performing member be discharged by one or more escape cocks.In each blowing circulation, repeat this process.
As recognizing, owing to the fair speed of the mold cycle that can realize at present, even the little increase of the energy in each mold cycle can cause the raising greatly of running cost.One of prime cost that is associated with SBM system and whole blowing is be used to the to expand pressurized gas of performing member.Needed gas flow and the described gas energy needed amount of pressurization may be significant.In addition, owing at low pressure and the high pressure that requires in the high pressure blowing stage, require the energy of remarkable quantity to operate the blowing valve at present, this is because high pilot pressure requirement.
For example, that prior art blowing valve is possible or the guide activates or electric actuation.Activate if the blowing valve all is the guide, valve requires big cross section usually for the pilot fluid effect or alternatively, requires high pilot pressure so.If the cross section of valve is bigger, " footprint " of this valve so, namely the zone that is occupied by this valve can increase the overall dimensions of valve piece significantly.Alternatively, if the cross sectional area by the pilot pressure effect of valve is less, will require significantly higher pilot pressure so, this causes the increase of running cost.
If on the other hand, the blowing valve is electric actuation, solenoid-actuated valve for example, and so powerful biasing member, for example brute spring is exactly essential to overcome the blow molding process hydrodynamic pressure on the sealing surfaces that acts on this valve.Along with the increase of spring strength, solenoid increases too for overcoming the desired energy of spring force.The increase of this energy can increase the running cost of valve piece significantly.
Fig. 1 shows the sectional view of the part of prior art blowing valve block assembly 100.Valve block assembly 100 comprises valve piece housing 101, is arranged in valve 102 and the stretching bar 103 of housing 101.Though only show a valve 102, be appreciated that valve block assembly 100 generally includes the valve more than.Usually, with valve 102 similarly three or more valve be arranged in the valve block assembly, wherein first valve provides low pressure feed to arrive performing member, second valve provides high pressure to be fed to performing member, and the 3rd valve is configured to performing member is discharged.In some prior art valve block assemblies, the 4th valve also is provided, its during discharge phase to being carried out recirculation by the part of the gas in the product of molding.
Stretching bar 103 comprises elongate rod, and it extends through stretching bar hole 104 and contact the performing member (not shown) when being extended, and this is well known in the art.The position of stretching bar 103 can be by the control of independent equipment (not shown), this in SBM industry be know and be unessential for the understanding of the present invention.
Each valve 102 is configured to control into and/or goes out the flow of pressurized gas of performing member, thereby performing member is carried out molding and when mold cycle finishes gas discharged from performing member.In order to control flow of pressurized gas, each valve 102 comprises piston mobile 105.Piston mobile 105 is positioned in the control chamber 106.Control chamber 106 is adapted to pass through pilot pressure port 107 and receives pilot pressure.Pilot pressure acts on the piston 105 so that piston 105 is moved up as shown in figure.Control chamber 106 also comprises ventilated port 108, and it stops formation vacuum when piston 105 moves in control chamber 106.
As shown, piston 105 also comprises the piston rod 109 that extends from piston 105.Piston rod 109 comprises sealing surfaces 110, and it is suitable for being sealed on the valve seat 111 that is formed in the body 101 when formerly the pilot masterpiece is used on the piston 105.
When valve 102 was shown in an open position, as shown in FIG. 1, process air was supplied by process air supply port 112.Process air can be advanced with the opening 113 that is communicated with performing member towards being formed in the stretching bar 103.In other prior art valve block assembly, opening 113 can be formed between stretching bar 103 and the stretching bar path 10 4.
In many prior art systems, process air is fed to valve block assembly 100 by the pressure with about 40 bar (580psi).When valve 102 was opened, the pressure of 40 bar acted on the whole sealing surfaces 110 basically.In an example of prior art valve, sealing surfaces 110 comprises about 30mm(1.2 inch) diameter d 1, and piston 105 comprises about 50mm(2.0 inch) diameter d 2When the process fluid of 40 bar acts on the sealing surfaces 110, need be greater than 2,827.44 N (635.63 lb f) power come cut-off valve.Activate if valve is the guide, shown in for example, cut-off valve 102 just needs the pilot pressure that pilot pressure port 107 supplies that passes through of about 15 bar (218 psi) to cross diameter d so 2Act on the piston 105.Therefore, not only the valve 102 of prior art has occupied the space of significant quantity, therefore require bigger valve block assembly 100, and prior art valve 102 requires also quite high pilot pressure to operate valve 102.High pilot pressure partly is because require pilot pressure to overcome whole power of being set up by the process air that acts on the valve 102 basically.The pilot pressure of this increase has caused the remarkable increase of the running cost of valve block assembly 100.
Therefore, need a kind of valve in the art, it can reduce the running cost relevant with the valve block assembly.In addition, also need a kind of valve in related domain, it can reduce the size of valve block assembly, the high pressure (40 bar) that simultaneous adaptation often is associated with blow molding applications.The present invention has overcome these or other problem and has realized the progress in related domain.The invention provides a kind of pressure-compensated valve, it can reduce the zone that is occupied by this valve and reduce the desired pilot pressure that is delivered to the control chamber of this valve simultaneously.
Summary of the invention
Provide a kind of valve according to embodiments of the invention.This valve comprises housing and is formed on the interior process fluid supply port of this housing with the receiving process fluid.According to embodiments of the invention, this valve also is included in the piston that can move in this housing between open position and closed position.According to embodiments of the invention, this piston is included in the first pressure compensation surface that is communicated with described process fluid supply port fluid when this piston is shown in an open position.According to embodiments of the invention, this piston also comprises the second pressure compensation surface, its first portion is communicated with process fluid supply port fluid when piston is in the opening and closing position, and its second portion is communicated with process fluid supply port fluid when piston is shown in an open position.
Provide a kind of method of operating valve according to embodiments of the invention, this valve comprises piston, and this piston has first and second pressure compensations surface and can move between open position and closed position in housing.According to embodiments of the invention, the method comprising the steps of: the supplied with pressurized process fluid to the first portion on the second pressure compensation surface so that piston is activated towards open position from closed position.According to embodiments of the invention, this method also comprises step: the supplied with pressurized process fluid to the first pressure compensation surface so that the bias force towards closed position to be provided at piston.According to embodiments of the invention, this method also comprises step: supplied with pressurised fluid to the first portion on the second pressure compensation surface of piston and second portion so that the bias force towards open position to be provided at piston, wherein at the lip-deep bias force of second pressure compensation greater than at the lip-deep bias force of first pressure compensation, so that piston is remained on open position.
The aspect
According to an aspect of the present invention, valve comprises:
Housing;
Be formed on the interior process fluid supply port with the receiving process fluid of this housing;
The piston that in this housing, can between open position and closed position, move, and this piston comprises:
The first pressure compensation surface, it is communicated with process fluid supply port fluid when piston is shown in an open position; And
The second pressure compensation surface, its first portion is communicated with process fluid supply port fluid when piston is in the opening and closing position, and its second portion is communicated with process fluid supply port fluid when piston is shown in an open position.
Preferably, the first portion on the second pressure compensation surface comprises pressure actuated antelabium.
Preferably, the second portion on the second pressure compensation surface comprises valve seal surface and ramped surfaces.
Preferably, valve also comprises the valve seal base portion, and this valve seal base portion is connected to housing and comprises the part that is centered on by described piston.
Preferably, the valve seal base portion comprises valve seat, and valve seat is configured to form fluid tight seal basically with the piston seal surface that is formed on the piston when piston is in the closed position.
Preferably, valve also comprises the control chamber that is limited by housing and piston.
Preferably, valve also comprises pilot pressure port, and pilot pressure port is formed in the housing and with the control chamber fluid and is communicated with.
Preferably, valve also comprises the pressure compensation chamber, and it is communicated with and is communicated with process fluid port fluid with process fluid outlet fluid when piston is shown in an open position.
Preferably, the bias force that provides along the bias force of first direction and on the second pressure compensation surface along second direction is provided on the first pressure compensation surface process fluid pressure in the pressure compensation chamber, and second direction is opposite with first direction basically.
Preferably, housing comprises the part for the housing of blowing valve block assembly.
According to a further aspect in the invention, a kind of method of operating valve, this valve comprises piston, and this piston has first and second pressure compensations surface and can move between open position and closed position in housing, and described method comprises step:
The pressing technology fluid is fed to the first portion on the second pressure compensation surface so that piston is activated towards open position from closed position;
The supplied with pressurized process fluid to the first pressure compensation surface so that the bias force towards closed position to be provided at piston; And
Supplied with pressurised fluid to the first portion on the second pressure compensation surface of piston and second portion so that the bias force towards open position to be provided at piston, wherein at the lip-deep bias force of second pressure compensation greater than at the lip-deep bias force of first pressure compensation, so that piston is remained on open position.
Preferably, the first portion on the second pressure compensation surface comprises pressure actuated antelabium.
Preferably, the second portion on the second pressure compensation surface comprises valve seal surface and ramped surfaces.
Preferably, this method also comprises step: control chamber is pressurized to threshold pressure so that plunger actuation is arrived closed position.
Preferably, this method also comprises step: the supply process fluid is to performing member when piston is shown in an open position.
Preferably, this method also comprises step: form fluid tight seal basically when piston is in the closed position between the valve seal surface of piston and valve seat.
Description of drawings
Fig. 1 shows the sectional view of the part of prior art blowing valve piece.
Fig. 2 shows the sectional view of valve according to an embodiment of the invention.
Fig. 3 shows the sectional view of valve according to another embodiment of the present invention.
Fig. 4 shows and has the sectional view of the part of the blowing valve piece of valve according to an embodiment of the invention.
Embodiment
Concrete example has been described in Fig. 2-4 and following description, and how those skilled in the art make and use optimal mode of the present invention with instruction.In order to instruct the purpose of the principle of the invention, some traditional aspects are simplified or omit.Those skilled in the art will recognize that the modification to these examples that falls in the scope of the invention.Those skilled in the art will recognize that the feature that describes below can be combined to form a plurality of modification of the present invention in every way.So, the concrete example that the invention is not restricted to describe below, but only limited by claim and equivalent way thereof.
Fig. 2 shows the sectional view of valve 200 according to an embodiment of the invention.According to following discussion, valve 200 can be suitable for being used with the valve block assembly of blow-molding system, for example is included in the valve block assembly 400 shown in the intrasystem Fig. 4 of SBM.Therefore, valve 200 can be provided to the valve 102 that provides among Fig. 1 is improved.Therefore, some reference characters among Fig. 1 are used to illustrate how valve 200 can be comprised in the valve block assembly 400 in the remaining part of this description.But, though valve 200 is discussed as in the valve block assembly that is included in the SBM system, example is valve block assembly 400 as shown in Figure 4, is appreciated that valve 200 can be comprised in other the system.Therefore, the present invention should not be restricted to SBM application or blow molding applications.
According to embodiments of the invention, valve 200 comprises housing 201.Be appreciated that housing 201 can comprise such as the part of valve piece housing shown in Figure 4 or comprises and can be positioned at for example independent housing of prior art housing 101.Alternatively, housing 201 can comprise independently assembly.According to embodiments of the invention, valve 200 also comprises the piston 202 that can move and the valve seal base portion 203 that is connected to housing 201 and is centered at least in part by piston 202 in housing 201.According to embodiments of the invention, piston 202 can move between closed position (Fig. 2) and open position (Fig. 3).
According to embodiments of the invention, at least a portion of valve seal base portion 203 also is positioned in the housing 201.Though whole valve seal base portion 203 is shown as and is positioned in the housing 201, is appreciated that in other embodiments, the part of valve seal base portion 203 can be positioned in the outside of housing 201.In the illustrated embodiment, two sealing component 203a, 203b have formed fluid tight seal basically between valve seal base portion 203 and housing 201.Be appreciated that in other embodiments, can provide a sealing component or more than two sealing component.As shown in FIG. 2, the part 250 of valve seal base portion 203 extends into piston 202 and is centered on by piston 202.Therefore, piston 202 can comprise the part 251 of general hollow, and the part of hollow is suitable for the part 250 of receiving valve sealing base portion 203.
According to embodiments of the invention, valve 200 comprises control chamber 204.Control chamber 204 can be limited by housing 201 and piston 202 at least in part.More particularly, control chamber 204 can be limited by housing 201 and the piston area 205 that is exposed to control chamber 204 at least in part.Control chamber 204 can comprise pilot pressure port 107, as shown in fig. 1.Pilot pressure port 107 is communicated with piston area 205 fluids of valve piston 202.Advantageously, when pilot power is provided to pilot pressure port 206 from pilot pressure supply (not shown) in the ban, pilot pressure act on the piston 202 with piston 202 along the first direction biasing, this is shown as in Fig. 2 upwards towards closed position.According to embodiments of the invention, piston 202 comprises sealing component 215, and itself and housing 201 form fluid tight seal basically with the pilot pressure in the retentive control chamber 204.
Be depicted as the valve that comprises that the guide activates though it should be understood that the present invention according to an embodiment, in other embodiments, valve 200 can be electric actuation.For example, piston 202 can use solenoid rather than pilot pressure to activate.Therefore, the present invention should not be restricted to the valve that the guide activates.
According to embodiments of the invention, housing 201 also comprises process fluid supply port 112.Process fluid supply port 112 can receive the pressing technology fluid from process fluid supply (not shown), explains ground as top with reference to Fig. 1.As top discussion ground, be used among some embodiments of blow molding applications at valve 200, process fluid can be by the pressure supply with about 40 bar of the most high or ultra mistake.Process fluid is air normally, but can comprise other fluid.
According to embodiments of the invention, valve 200 also comprises pressure compensation chamber 206, and it exports with process fluid, and 207 fluids are communicated with and optionally supply port 112 fluids with process fluid is communicated with.Process fluid outlet 207 can be formed on stretching bar 103 in opening 113 fluids be communicated with (see figure 4) for example.Alternatively, process fluid outlet 207 can be led to another parts (not shown), optionally provides the pressing technology fluid by valve 200 to these another parts.
According to embodiments of the invention, piston 202 can be with activateding less than the power that activates prior art piston 105.This can cause lower pilot pressure or use power (if this valve is electric actuation) still less.In the embodiment shown in Fig. 2, piston 202 is in the closed position.According to embodiments of the invention, when the pilot pressure in the control chamber 204 reached threshold pressure, piston 202 can be moved to closed position.In closed position, the valve seal of piston 202 surface 208 forms fluid tight seal with the valve seat 209 of valve seal base portion 203.In closed position, the process fluid that is supplied to process fluid supply port 112 is stoped to arrive pressure compensation chamber 206 and process fluid outlet 207 basically.In certain embodiments, both can comprise suitable sealing material valve seal surface 208, valve seat 209 or they, other the material that can partly compress of rubber or some for example, and this can for example increase the sealability between valve seal surface 208 and the valve seat 209.
According to embodiments of the invention, piston 202 also comprises pressure actuated antelabium 210.In the embodiment shown in Fig. 2, when piston 202 is closed, from the process fluid flow of process fluid supply port 112 by fluid passage 211,212 and act on the pressure actuated antelabium 210.As shown, pressure actuated antelabium 210 is substantially perpendicular to the motion of piston 202 and extends, and it is along longitudinal axis L.In other embodiments, pressure actuated antelabium 210 can be formed angled with respect to longitudinal axis L.Even since when piston 202 is closed pressure actuated antelabium 210 still with the pressing technology fluid communication, bias force along second direction is provided for thus piston 202 so process fluid acts on the pressure actuated antelabium 210, first direction with 202 edges of pilot pressure offset piston is opposite basically for it.
As recognizing, pressure actuated antelabium 210 all is exposed to process fluid supply 112 when opening and closing the position because be at piston 202, so as long as process fluid just provides bias force at pressure actuated antelabium 210 when process fluid is supplied to port one 12.According to embodiments of the invention, piston 202 also comprises one or more high pressure sealing members 213, the vent port 214 that it stops the high-pressure process fluid to escape into basically to be formed in the piston 202 and is communicated with vent port 108 fluids in being formed on housing 201.Sealing component 213 can comprise O shape ring, K shape ring etc.Employed specific sealing component should not limit the scope of the invention.
According to embodiments of the invention, the size of pressure actuated antelabium 210 is configured such that to have about 25mm(0.95 inch at piston area 205) diameter D 1Situation under, when process fluid was in the pressure of about 40 bar (580 psi), this was typical in SBM uses, can cut-off valve 200 less than the pilot pressure of 10 bar (145 psi) and about 8 bar (116 psi) of more specifically saying so.As recognizing, the piston area 205 in this exemplary embodiment comprises the diameter d of the piston 105 that is prior art valve 102 2Half diameter.Suppose circular cross section, this causes being reduced to 1/4th by piston area 205 occupied zones.According to embodiments of the invention, this minimizing of the cross sectional area of piston area 205 is feasible, and wherein the external diameter of the part that extends into piston 202 250 of valve seal base portion 203 comprises about 24mm(0.94 inch) diameter D 2, and pressure actuated antelabium 210 comprises about 25.5mm(1 inch) D outer diameter 3As recognizing, at diameter D 3And D 2Between the space caused acting on pressure on pressure actuated antelabium 210 and the sealing component 213.These sizes have caused about 58.32mm 2(0.09in 2) useful area, when being sealed on the valve seat 209 at piston 202 for the process fluid pressure effect of 40 bar.This has caused 233.26 N (52.44 lb along second direction f) power.Therefore, owing to the bias force that is provided by the process fluid that acts on the pressure actuated antelabium 210, valve 200 can operate to open this valve under the situation that need not spring or other biasing member.Those skilled in the art will recognize easily that above-mentioned size and pressure only are examples and never should limit the scope of the invention.
If can recognize that piston 202 can be maintained in its closed position to drop to up to the power along first direction on piston 202 and be lower than threshold force, namely is 233.26 N in this example.
Fig. 3 shows the sectional view of the part of valve 200 according to another embodiment of the present invention.In the embodiment show in figure 3, the pilot pressure in control chamber 204 has dropped to be lower than piston 202 has been maintained in its closed position required threshold level.Therefore, owing to the bias force that is provided by the process fluid that acts on pressure actuated antelabium 210 and the sealing component 213, piston 202 has moved on to open position along second direction.At open position, piston 202 breaks away from from valve seat 209.Piston 202 can be opened fully and lean against from the projection 330 that piston area 205 extends on the part of formation control chamber 204 of housing 201.In comprising the embodiment of this projection, projection 330 can stop whole piston area 205 contact housings 201, and this area that can will be exposed to the piston area 205 of pilot pressure when piston 202 is shown in an open position is reduced to the area of pilot pressure port 107.This structure will require higher pilot pressure to come mobile piston 202 initially and the remaining part of piston area 205 will be exposed to pilot pressure.In other embodiments, piston area 205 can be smooth and projection 330 can be extended from housing 201.
According to embodiments of the invention, when piston 202 was shown in an open position, process fluid outlet 207 and pressure compensation chamber 206 were communicated with process fluid supply port 112 fluids.Because process fluid is supplied to pressure compensation chamber 206, process fluid acts on the first and second pressure compensation surfaces 315,316 of piston 202.As shown, the second pressure compensation surface 316 comprises first portion, and first portion comprises pressure actuated antelabium 210.As explained above, first portion supplies 112 fluids with process fluid at piston 202 during in the closed position and open position and is communicated with.
According to embodiments of the invention, the first portion on the second pressure compensation surface 316 can also comprise sealing component 213,313 the part that is exposed to process fluid.As shown in the drawing, when piston 202 is shown in an open position, process fluid also will act in the sealing component 213,313 with along second direction offset piston 202.In certain embodiments, the pressure that acts on the sealing component 213,313 can be out in the cold, and this is because area is compared quite little with all the other areas on the second pressure compensation surface 316.But, because the process fluid pressure of 40 bar may gratifyingly be that the power of being set up by the pressure that acts on the sealing component 213,313 is taken into account.
The second pressure compensation surface 316 also is included in piston 202 and supplies the second portion that 112 fluids are communicated with process fluid when being shown in an open position.According to embodiments of the invention, second portion is opened with process fluid supply 112 sealings when piston 202 is in the closed position basically.According to embodiments of the invention, the second portion on the second pressure compensation surface 316 comprises piston seal surface 208 and ramped surfaces 317.Should be realized that in certain embodiments, ramped surfaces 317 can be omitted and more particularly, sealing surfaces 208 may extend into the end of piston 202.But, ramped surfaces 317 can be configured to help to guide fluid to flow out from valve 200 by pressure compensation chamber 206 and when piston 202 is shown in an open position.According to one exemplary embodiment of the present invention, ramped surfaces 317 is spent angles with the longitudinal axis L of piston 202 into about 30.This angle only is example, and never should limit the scope of the invention.
As recognizing, the pressure that acts on the first pressure compensation surface 315 provides bias force along first direction at piston 202, and this is (closing) upwards as shown in drawings.On the contrary, the process fluid that acts on the second pressure compensation surface 316 provides bias force along second direction at piston 202, and this is downward (opening) as shown in drawings.Owing to act on pressure on two pressure compensation surfaces 315,316 with opposite basically directive effect, thus act on the part payment of the bias force on the piston 202, i.e. balance, this has produced pressure compensated valve at least in part.Therefore because piston 202 breaks away from from valve seat 209, process fluid pressure provide with act on pressure compensation surface 315,316 in power on any quite little clean power that acts on the piston 202 comparing.The clean power that acts on the piston 202 can be determined based on the difference between the surface area on the 315 and second pressure compensation surface 316, first pressure compensation surface.
According to embodiment illustrated in the accompanying drawings, the external diameter on the 315 and second pressure compensation surface 316, first pressure compensation surface equates basically.But, pressure compensation surface 315,316 area are different, and this is owing to be substantially equal to the first diameter D of piston area 205 of the internal diameter on the first pressure compensation surface 315 1The second diameter D with the part 250 of the valve seal base portion 203 that is positioned at piston 202 of the internal diameter that defines the second pressure compensation surface 316 2Between poor.Use with top examples shown in identical size, in one example, the first diameter D 1Be the 25mm(0.98 inch approximately), and the second diameter D 2Be the 24mm(0.94 inch approximately).Poor based on this, the effectively clean surface area (area on the second pressure compensation surface 316 deducts the area on the first pressure compensation surface 315) on the second pressure compensation surface is 38.48 mm 2(0.06 in 2).The area that should effectively clean surface area being equivalent to the external diameter (25mm) by piston area 205 basically provides deducts the area that the external diameter (24mm) by the part that extends to piston 202 250 of valve seal base portion 203 provides.This is to have fallen because of the counteracted by pressure on the area of the diameter that surpasses piston area 205 that acts on the 315 and second pressure compensation surface 316, first pressure compensation surface.
The part that extends into piston 202 250 of effectively clean surface area hypothesis piston 202 and valve seal base portion 203 comprises circular cross section.It should be understood that valve 200 can comprise other shape of cross section.Based on the process fluid of 40 bar, the clean power that acts on the piston 202 that is provided by process fluid when valve seat 209 breaks away from piston 202 is 153.94 N (34.61 lb f).According to embodiments of the invention, thereby because to act on the clean power of opening with offset piston 202 on the piston 202 be 153.94N, the pilot pressure of 8 bar can easily be closed valve 200 when needed.As mentioned above, the size that provides and pressure only are examples and never should limit the scope of the invention.Or rather, the particular value that provides is the auxiliary the present invention that understands and understand.
Fig. 4 shows the sectional view of the part of blowing valve piece 400 according to an embodiment of the invention.Blowing valve piece 400 is similar to the prior art blowing valve piece shown in Fig. 1.Therefore, similarly parts share with Fig. 1 in identical reference character.Difference between prior art blowing valve piece 100 and the blowing valve piece 400 of the present invention is the valve 102 that valve 200 has replaced prior art.As shown, valve 200 receives the process fluid supply of the process fluid supply port 112 in self-forming and the housing 201, and this housing comprises the housing of valve piece 400 among Fig. 4.In addition, process fluid outlet 207 be shown as be formed on stretching bar 103 in opening 113 fluids be communicated with.Therefore, those skilled in the art can expect easily that valve 200 and prior art valve piece 100 phase specific energys reduce the energy requirement of operation valve piece 400 widely.In addition, though be appreciated that a valve 200 only is shown in Fig. 4, in fact, valve piece 400 can comprise the valve 200 more than.For example, valve piece 400 can comprise three or four valves, and is as explained above.
In use, valve 200 can be used to control the supply of pressing technology fluid.The process fluid supply can be used for the SBM system or requires some other systems of pressure fluid supply.According to embodiments of the invention, valve 200 can be actuated to closed position to control chamber 204 so that control chamber 204 is pressurized to threshold pressure by the supply pilot pressure.Because valve 200 is actuated to closed position, valve seal surface 208 has formed fluid tight seal basically with valve seat 209.Therefore, process fluid acts in the first portion on pressure compensation surface 316, and it comprises pressure actuated antelabium 210 and sealing component 213, rather than the second whole pressure compensation surface 316, thereby provides bias force along second direction at piston 202.Therefore, based on the pilot pressure of 8 bar (116psi) and the process fluid pressure of 40 bar (580psi), piston 202 is by having about 392.70 N (88.28 lb f) pilot pressure of power is along first direction biasing and by having about 233.26 N (52.44 lb f) the process fluid pressure of power setovers along second direction.Therefore, piston seal surface 208 is by 159.44 N (35.84 lb f) try hard to keep only to hold and be sealed on the valve seat 209.
In case, pilot pressure is removed or drops to and is lower than threshold level, this process fluid pressure based on above-mentioned size and 40 bar is 4.75 bar (68.90psi) approximately, and acting on process fluid in the first portion on the second pressure compensation surface 316 provides enough power with along second direction mobile piston (shown in the drawings serves as downward) to open position.As discussed above, at open position, the projection 330 of extending from piston area 205 leans against on the housing 201.Advantageously, pressure actuated antelabium 210 has been eliminated basically to Returnning spring or analog mobile piston sealing surfaces 208 needs away from valve seat 209.
According to embodiments of the invention, because piston 202 is moved to open position, process fluid can act on the first pressure compensation surface 315 so that the bias force along first direction to be provided at piston 202, towards closed position.Process fluid also can provide the bias force along second direction on the second pressure compensation surface 316, and it is opposite with first direction basically.Because the bias force that acts on the piston 202 is partly compensated, acting on the piston 202 with the clean power that piston 202 is biased to open position is 153.94 N (34.61 lb approximately f), this is because the bigger surface area on the second pressure compensation surface 316 is as discussed above.For cut-off valve 200 again, control chamber 204 can be pressurized to and be higher than threshold pressure to overcome the clean bias force of piston 202.
As described above the present invention can be widely reduced in size and/or operation valve 200 desired pilot pressures.The operation pressure that acts on the piston 202 is advantageously compensated by the first and second pressure compensation surface portion ground, and the part of the power that is produced by process fluid has been offseted on described pressure compensation surface.Advantageously, even the clean power that acts on the piston 202 is for example also being reduced during operation under 40 bar widely with hyperbaric environment.The present invention also provides pressure actuated antelabium 210, and it is in when opening and closing at piston 202 and all is communicated with the process fluid fluid, to have eliminated the needs to Returnning spring or analog.
It or not whole embodiments' that the inventor who falls in the scope of the invention is expected detailed description to top embodiment's specific descriptions.In fact, those skilled in the art will recognize that some element of above-described embodiment can be combined by different way or omit to set up other embodiment, and these other embodiment also falls into scope of the present invention and instruction.What those skilled in the art also understood is, above-described embodiment can be by integrally or partially combined to set up the extra embodiment in the scope of the invention and the instruction.
Therefore, although described the specific embodiment of the present invention and example for purpose of illustration herein, within the scope of the invention, various to be equal to improvement also be possible, and this is that those skilled in the art can recognize.Instruction provided herein can be applied to other valve, and is not only to be applied to above-mentioned and embodiment illustrated in the accompanying drawings.Therefore, scope of the present invention should be determined according to following claim.

Claims (16)

1. a valve (200), it comprises:
Housing (201);
Be formed on the interior process fluid supply port (112) with the receiving process fluid of this housing (201);
The piston (202) that in this housing (201), can between open position and closed position, move, and this piston comprises:
The first pressure compensation surface (315), it is communicated with process fluid supply port (112) fluid when being shown in an open position at piston (202); And
The second pressure compensation surface (316), its first portion (210) is communicated with process fluid supply port (112) fluid when piston (202) is in the opening and closing position, and its second portion (208,317) is communicated with process fluid supply port (112) fluid when being shown in an open position at piston (202).
2. valve as claimed in claim 1 (200), wherein the first portion on the second pressure compensation surface (315) comprises pressure actuated antelabium (210).
3. valve as claimed in claim 1 (200), wherein the second portion on the second pressure compensation surface (315) comprises valve seal surface (208) and ramped surfaces (317).
4. valve as claimed in claim 1 (200) also comprises valve seal base portion (203), and it is connected to housing (201) and comprises the part (250) that is centered on by piston (202).
5. valve as claimed in claim 4 (200), wherein valve seal base portion (203) comprises valve seat (209), and valve seat is configured to form fluid tight seal basically with the piston seal surface (208) that is formed on the piston (202) when piston (202) is in the closed position.
6. valve as claimed in claim 1 (200) also comprises control chamber (204), and it is limited by housing (201) and piston (202).
7. valve as claimed in claim 6 (200) also comprises pilot pressure port (107), and pilot pressure port is formed in the housing (201) and with control chamber (204) fluid and is communicated with.
8. valve as claimed in claim 1 (200) also comprises pressure compensation chamber (206), and it is communicated with and is communicated with process fluid port (112) fluid with process fluid outlet (207) fluid when being shown in an open position at piston (202).
9. valve as claimed in claim 8 (200), wherein the bias force that provides along the bias force of first direction and on the second pressure compensation surface (316) along second direction is provided on the first pressure compensation surface (315) the process fluid pressure in pressure compensation chamber (206), and second direction is opposite with first direction basically.
10. valve as claimed in claim 1 (200), its middle shell (201) comprises the part for the housing of blowing valve block assembly (400).
11. a method of operating valve, this valve comprises piston, and this piston has first and second pressure compensations surface and can move between open position and closed position in housing, and described method comprises step:
The pressing technology fluid is fed to the first portion on the second pressure compensation surface so that piston is activated towards open position from closed position;
The supplied with pressurized process fluid to the first pressure compensation surface so that the bias force towards closed position to be provided at piston; And
Supplied with pressurised fluid to the first portion on the second pressure compensation surface of piston and second portion so that the bias force towards open position to be provided at piston, wherein at the lip-deep bias force of second pressure compensation greater than at the lip-deep bias force of first pressure compensation, so that piston is remained on open position.
12. method as claimed in claim 11, wherein the first portion on the second pressure compensation surface comprises pressure actuated antelabium.
13. method as claimed in claim 11, wherein the second portion on the second pressure compensation surface comprises valve seal surface and ramped surfaces.
14. method as claimed in claim 11 also comprises step: control chamber is pressurized to threshold pressure so that plunger actuation is arrived closed position.
15. method as claimed in claim 11 also comprises step: the supply process fluid is to performing member when piston is shown in an open position.
16. method as claimed in claim 11 also comprises step: when piston is in the closed position, between the valve seal surface of piston and valve seat, form fluid tight seal basically.
CN201180044057.6A 2010-09-13 2011-09-10 Pressure compensated valve Expired - Fee Related CN103201548B (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US38230810P 2010-09-13 2010-09-13
US61/382,308 2010-09-13
US61/382308 2010-09-13
PCT/EP2011/065699 WO2012034953A1 (en) 2010-09-13 2011-09-10 Pressure compensated valve

Publications (2)

Publication Number Publication Date
CN103201548A true CN103201548A (en) 2013-07-10
CN103201548B CN103201548B (en) 2015-02-25

Family

ID=44583081

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201180044057.6A Expired - Fee Related CN103201548B (en) 2010-09-13 2011-09-10 Pressure compensated valve

Country Status (3)

Country Link
EP (1) EP2616728A1 (en)
CN (1) CN103201548B (en)
WO (1) WO2012034953A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104295549A (en) * 2014-10-16 2015-01-21 江苏恒立液压有限公司 Split type pressure compensation valve

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2870394A4 (en) * 2012-07-09 2016-05-04 Norgren Inc Electromagnet assisted pressure-actuated valve
DE102014015416A1 (en) * 2014-10-20 2016-04-21 Krones Ag Hollow body manufacturing machine
EP4082751B1 (en) 2021-04-29 2024-03-13 Eugen Seitz AG Method for operating a valve unit and valve unit
EP4082750B1 (en) * 2021-04-29 2023-11-01 Eugen Seitz AG Fixture of a blowing device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3860073A (en) * 1974-01-25 1975-01-14 Norris Industries Fire extinguisher discharge valve
EP0188048A1 (en) * 1984-09-21 1986-07-23 Moog Inc. Pilot-operated valve
CN2520443Y (en) * 2002-01-09 2002-11-13 湖南省中潭科技企业有限公司 Guide control, pressure compensation safety protection self-operating pressure reducing valve for feedback system
CN1886179A (en) * 2003-12-30 2006-12-27 克劳迪奥·贝内蒂 An apparatus for launching balls for sports practice

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3860073A (en) * 1974-01-25 1975-01-14 Norris Industries Fire extinguisher discharge valve
EP0188048A1 (en) * 1984-09-21 1986-07-23 Moog Inc. Pilot-operated valve
CN2520443Y (en) * 2002-01-09 2002-11-13 湖南省中潭科技企业有限公司 Guide control, pressure compensation safety protection self-operating pressure reducing valve for feedback system
CN1886179A (en) * 2003-12-30 2006-12-27 克劳迪奥·贝内蒂 An apparatus for launching balls for sports practice

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104295549A (en) * 2014-10-16 2015-01-21 江苏恒立液压有限公司 Split type pressure compensation valve

Also Published As

Publication number Publication date
EP2616728A1 (en) 2013-07-24
CN103201548B (en) 2015-02-25
WO2012034953A1 (en) 2012-03-22

Similar Documents

Publication Publication Date Title
CN100540271C (en) Be used to make the blowing device of thermoplastic container
US9353771B2 (en) Multiple-stage valve system
JP6531094B2 (en) Valve device
CN103201548A (en) Pressure compensated valve
CN104411475B (en) Stretch blow molding system
CN101663524B (en) Air-controlled valve
CN111417808B (en) Valve unit
WO2015121285A1 (en) A valve for a blow molding machine and a method for actuating a valve for a blow molding machine
CN102656003B (en) Blow molding valve for a blow molding valve block
US20120177770A1 (en) Apparatus for the expansion of containers
CN1232737C (en) Multi-pressure ball-shape lifting control valve
WO2014068080A1 (en) Stretch blow molding system with simultaneous preblowing valve actuation
US20150042022A1 (en) Stretch blow molding system with a proportional pre-blowing valve
WO2011079917A1 (en) A blow-molding system with a stretch rod including one or more valves, a rod for a blow moulding system and a method for operating a blow-moulding
CN103415710B (en) Multistage fluid operated actuator
CN102666067A (en) A valve block assembly for a blow molding system
US20130153809A1 (en) Blowing Machine Valve

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150225

Termination date: 20170910