CN203189816U - Fluid adjusting device and balance port control assembly therefor - Google Patents
Fluid adjusting device and balance port control assembly therefor Download PDFInfo
- Publication number
- CN203189816U CN203189816U CN2012205105468U CN201220510546U CN203189816U CN 203189816 U CN203189816 U CN 203189816U CN 2012205105468 U CN2012205105468 U CN 2012205105468U CN 201220510546 U CN201220510546 U CN 201220510546U CN 203189816 U CN203189816 U CN 203189816U
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- valve plug
- control unit
- fluid
- pressure induction
- balance
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- 239000012530 fluid Substances 0.000 title claims abstract description 63
- 238000007789 sealing Methods 0.000 claims abstract description 43
- 230000006698 induction Effects 0.000 claims description 87
- 230000004888 barrier function Effects 0.000 claims description 46
- 239000012528 membrane Substances 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000002955 isolation Methods 0.000 abstract 2
- 230000008685 targeting Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/04—Control of fluid pressure without auxiliary power
- G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
- G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
- G05D16/0675—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting on the obturator through a lever
- G05D16/0694—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting on the obturator through a lever using a spring-loaded membrane with a spring-loaded slideable obturator
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/02—Modifications to reduce the effects of instability, e.g. due to vibrations, friction, abnormal temperature, overloading or imbalance
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Lift Valve (AREA)
Abstract
The utility model provides a fluid adjusting device and a balance port control assembly therefor. The balance port control assembly comprises a controlling element, which comprises a valve plug coupled to a valve rod and a pressure intensity sensing maze. The pressure intensity sensing maze is used for the fluid communication between a sealing surface of the valve plug and a balance isolation film borne by the internal part of the controlling element. The pressure intensity sensing maze comprises at least one pressure intensity sensing channel which extends from the sealing surface in to the valve plug along the central longitudinal axis of the controlling element. With the above arrangement, the fluid pressure intensity of the sealing surface of the valve plug also exists on the balance isolation film, and thereby equal and opposite force can be applied on the controlling element.
Description
Technical field
The application relates to gas conditioner, relates in particular to the gas conditioner with balance valve port.
Background technique
The typical pressure of gas distributing system when supply gas may change according to the requirement to system, weather, supply source and/or other factors.Yet great majority are equipped with the terminal use's facility such as gas device such as firing chamber, baking ovens to require gas at the maximum capacity of gas conditioner or be lower than under the maximum capacity to transmit according to predetermined pressure.Therefore, gas conditioner is applied to the requirement that the gas that is transmitted to guarantee in these distribution systems meets terminal use's facility.Conventional gas conditioner generally includes the closed loop control actuator for the pressure of induction and the control gas that transmits.
Except closed loop control, some conventional gas regulators comprise that also the balance valve port improves gas conditioner to the reaction of downstream pressure change.The balance valve port is suitable for reducing entrance pressure to the influence on the gas conditioner performance.Entrance pressure is communicated with balance barrier film fluid, is applied to the power on the opposite direction of entrance pressure with the control unit to gas conditioner.Therefore, as described further below, since the entrance pressure change, the power that corresponding power is applied in balance to be produced by entrance pressure, thus gas conditioner only responds the back pressure effect.
As will more complete description, in the conventional regulator with balance valve port, a part of fluid of gas coming through regulator can be advanced and be passed the passage that is arranged in the control unit, and these passages are towards at least part of counter balance pocket opening that is limited by the balance barrier film.This configuration allows the high flow capacity under low entrance pressure.Yet because valve opens wide, the entrance pressure that is applied on the balance barrier film can't keep constant.More specifically, induction pressure reduces owing to valve opens wide, and causes being called as the phenomenon of " sagging " and the instability in the gas conditioner.
The model utility content
In order to solve in the prior art because valve is unlimited, the entrance pressure that is applied on the balance barrier film can't keep problems such as instability constant and that gas conditioner is interior, the balance ports control unit that the utility model provides a kind of fluid regulating device and is used for described fluid flow control device.
An aspect of the present disclosure comprises fluid regulating device, and it comprises valve body, and this valve body defines entrance, exports and be arranged on the valve port between the entrance and exit.Described device also can comprise the port housing that is arranged in the valve body and forms central cylindrical shape opening.Described device also can comprise control unit, and it is at least part of to be slidably disposed in the central cylindrical shape opening of port housing, and is suitable for being shifted between the isolated open position in the operating position that engages valve port with away from valve port along the central shaft of control unit.Control unit can comprise valve rod and the valve plug that is coupled to valve rod, and valve plug defines sealing surfaces, and when control unit was in the close position, sealing surfaces was suitable for the sealing engagement valve port.Described device also can comprise the balance barrier film that is coupled between control unit and the port housing.The balance barrier film can have the first and second relative membrane surfaces.Described device also can comprise the counter balance pocket in the part of the described port housing between first membrane surface of the internal surface that is arranged on the port housing and balance barrier film.At last, described device also can comprise the first pressure induction channels, it extends through valve plug and is communicated with the counter balance pocket fluid, make the fluid pressure on the sealing surfaces of valve plug be present in equally in the counter balance pocket, apply separately with the first surface to the sealing surfaces of valve plug and balance barrier film and equate and the first and second opposite power.The first pressure induction channels has the intake section that extends through valve plug along the central shaft of control unit.
Wherein, described valve plug also comprises the center hole that extends along the described central shaft of described control unit, and be arranged in the described center hole and described valve plug is fixed to the valve plug fastening piece of described valve rod, described valve plug fastening piece limits at least a portion of the described intake section of the described first pressure induction channels.
Wherein, described valve plug comprises that outer valve plug partly, radially is arranged on the inboard internal valve plug portion of described outer valve plug part and is arranged on the outer wall of described internal valve plug portion and at least one center-aisle between the described outer valve plug inwall partly.
Wherein, described at least one center-aisle defines at least one the second pressure induction channels that extends through described valve plug and be communicated with described counter balance pocket fluid.
Wherein, also comprise sealed member, its be arranged in described at least one center-aisle and described internal valve plug portion is provided and described outer valve plug portion branch between fluid-tight seal.
Wherein, described at least one center-aisle comprises the hollow cylindrical interval that is arranged between described internal valve plug portion and the described outer valve plug portion branch.
Wherein, described sealed member comprises the O type ring that is arranged in the described hollow cylindrical interval.
Another aspect of the present disclosure comprises a kind of balance ports control unit for fluid flow control device, and it comprises the port housing that defines central cylindrical shape opening.Described assembly also can comprise valve rod, and it has center longitudinal axis and at least part of being arranged in the port housing, is used for moving back and forth along described center longitudinal axis.Described assembly also can comprise valve plug, the sealing surfaces that it is coupled to described valve rod and limits the valve port that is suitable for selectivity sealing engagement fluid flow control device.Described assembly also can comprise the balance barrier film that operationally is coupled between valve plug and the port housing, and wherein said balance barrier film has the first and second relative membrane surfaces.Described assembly also can comprise counter balance pocket, and it is limited in the part of the described port housing between first membrane surface of the internal surface of port housing and balance barrier film.At last, described device also can comprise the first pressure induction channels, it extends through valve plug and is communicated with the counter balance pocket fluid, make the fluid pressure on the sealing surfaces of valve plug be present in equally in the counter balance pocket, apply separately with the first surface to the sealing surfaces of valve plug and balance barrier film and equate and the first and second opposite power.The first pressure induction channels has the intake section that extends through valve plug along the center longitudinal axis of valve rod.
Wherein, described valve plug also comprises the center hole that extends along the described central shaft of described control unit, and be arranged in the described center hole and described valve plug is fixed to the valve plug fastening piece of described valve rod, described valve plug fastening piece limits at least a portion of the described intake section of the described first pressure induction channels.
Wherein, described valve plug comprises that outer valve plug partly, radially is arranged on the inboard internal valve plug portion of described outer valve plug part and is arranged on the outer wall of described internal valve plug portion and at least one center-aisle between the described outer valve plug inwall partly.
Wherein, described at least one center-aisle defines at least one the second pressure induction channels that extends through described valve plug and be communicated with described counter balance pocket fluid.
Wherein, also comprise sealed member, its be arranged in described at least one center-aisle and described internal valve plug portion is provided and described outer valve plug portion branch between fluid-tight seal.
Wherein, described at least one center-aisle comprises the hollow cylindrical interval that is arranged between described internal valve plug portion and the described outer valve plug portion branch.
Wherein, described sealed member comprises the O type ring that is arranged in the described hollow cylindrical interval.
Another aspect of the present disclosure comprises the balance ports control unit for fluid flow control device, and it comprises the port housing that defines central cylindrical shape opening.Described assembly also can comprise valve rod, and it has center longitudinal axis and at least part of being arranged in the port housing, is used for moving back and forth along described center longitudinal axis.Described assembly also can comprise valve plug, the sealing surfaces that it is coupled to described valve rod and limits the valve port that is suitable for selectivity sealing engagement fluid flow control device.Described assembly also can comprise the balance barrier film that operationally is coupled between valve plug and the port housing, and wherein said balance barrier film has the first and second relative membrane surfaces.Described assembly also can comprise counter balance pocket, and it is limited in the part of the described port housing between first membrane surface of the internal surface of port housing and balance barrier film.At last, described device also can comprise pressure induction labyrinth, its at least part of sealing surfaces and connection of the fluid between the counter balance pocket that limits and provide valve plug by valve plug, make the fluid pressure on the sealing surfaces of valve plug be present in equally in the counter balance pocket, apply separately with the first surface to the sealing surfaces of valve plug and balance barrier film and equate and the first and second opposite power.Described pressure induction labyrinth comprises at least one first pressure induction channels, and the described first pressure induction channels extends into valve plug along the central shaft of control unit from sealing surfaces.
Wherein, described pressure induction labyrinth also comprises at least one second pressure induction channels that described sealing surfaces that described valve plug is provided and the fluid between the described counter balance pocket are communicated with, and at least a portion of described at least one second pressure induction channels is limited by described valve plug and is parallel to the described first pressure induction channels setting.
Wherein, described valve plug comprises outer valve plug part and radially is arranged on the inboard internal valve plug portion of described outer valve plug part.
Wherein, the described first pressure induction channels in described pressure induction labyrinth is set up passes described internal valve plug portion, and described at least one second pressure induction channels in described pressure induction labyrinth is arranged between described internal valve plug portion and the described outer valve plug portion branch.
Wherein, described at least one second pressure induction channels comprise between the inner cylindrical surface of the outside cylindrical surface that is limited at described internal valve plug portion and described outer valve plug part hollow cylindrical at interval.
Wherein, also comprise sealed member, it is arranged in described at least one second pressure induction channels and fluid-tight seal is provided.
Wherein, described valve plug also comprises the center hole that extends along the described central shaft of described control unit, and be arranged in the described center hole and described valve plug is fixed to the valve plug fastening piece of described valve rod, described valve plug fastening piece limits at least a portion of the described intake section of the first pressure induction channels.
Technique effect:
In the utility model, be that equate and relative owing to be applied to the sealing surfaces of valve plug with power on the balance barrier film, thereby the influence of the operation of fluid input pressure fluid flow dynamic control device is minimized.And along with the entrance pressure increase of control unit, rated flow continues to increase and does not have because any decline that High Voltage causes.
Description of drawings
Fig. 1 is the cross-sectional side view of regulator that is equipped with a kind of form of conventional balance ports control unit;
Fig. 2 is the cross-sectional side view for second kind of form of the conventional balance ports control unit of for example regulator shown in Figure 1;
Fig. 3 is the plotted curve that flow that conventional balance ports control unit among Fig. 2 is shown is compared entrance pressure;
Fig. 4 is the cross-sectional side view that is suitable for being used in first kind of form of the balance ports control unit of the present disclosure in the regulator shown in Figure 1 for example;
Fig. 5 is the plotted curve that flow that balance ports control unit among Fig. 4 is shown is compared entrance pressure;
Fig. 6 is the cross-sectional side view that is suitable for being used in second kind of form of the balance ports control unit of the present disclosure in the regulator shown in Figure 1 for example;
Fig. 7 is the plotted curve that flow that balance ports control unit among Fig. 6 is shown is compared entrance pressure.
Embodiment
Fig. 1 shows fluid flow control device 10 (for example gas conditioner), and it comprises a kind of conventional balance ports control gear 12 of form.In addition, shown fluid flow control device 10 comprises the actuator 14 that is coupled to valve body 16.Valve body 16 comprises entrance 18, outlet 20 and is arranged on entrance 18 and exports valve port 22 between 20.Actuator 14 is based on the actuator of barrier film, and comprises the actuator casing 24 that holds barrier film 26 and control unit 28.Control unit 28 operationally is coupled to the movably control unit 40 of balance ports control unit 12.More specifically, control unit 28 comprises the control spring 30 that is arranged on barrier film 26 tops and extends through barrier film 26 and be positioned at the control piston 32 of its below.Control piston 32 may be operably coupled to the lever 34 of selectivity drive actuator bar 36.
In the conventional fluid flow control device 10 of Fig. 1, control spring 30 biased downward barrier films 26 and control piston 32 are sent to simultaneously the downside of barrier film 26, to offset the power that control spring 30 applies from the pressure at outlet 20 places of valve body 16.In Fig. 1, be provided with the downside that Pitot tube 38 is communicated with back pressure and barrier film 26, but this only is a kind of example for the purpose of description.Other forms of disclosed fluid flow control device 10 can realize this connection and not need Pitot tube 38, perhaps for example utilize external pipe or other form to realize.By configuration like this, during the normal running of fluid flow control device 10, actuator 14 the operating position of the valve port 22 of sealed valve body 16 as shown in Figure 1 and with known manner away from valve port 22 isolated open positions between the position of control unit 40 of control balance ports control unit 12.
Referring now to Fig. 2, will a kind of balance ports control unit 12 of routine be described.Assembly 12 illustrated in fig. 2 is somewhat different than assembly 12 illustrated in fig. 1, but operation roughly is identical.As shown in Figure 2, the control unit 40 of shown conventional balance ports control unit 12 comprises valve plug 42, and it is fixed to valve rod 44, is used for the operation of responsive actuation device 14 along central axis A sliding transfer (as shown in Figure 1).Assembly 12 also comprises the port housing 46 that defines central cylindrical shape opening 48, and valve plug 42 is slidably disposed on wherein.And assembly 12 comprises the balance barrier film 50 that is connected between port housing 46 and the control unit 40.Counter balance pocket 52 is limited in the port housing 46 between the internal surface 54 of balance barrier film 50 and port housing 46.At last, the one or more pressure induction channels 56 that provide fluid to be communicated with between the sealing surfaces 58 of valve plug 42 and counter balance pocket 52 are provided control unit 40.The inlet fluid pressure that described one or more pressure induction channels 56 is provided to act on the sealing surfaces 58 of valve plug 42 is sent to counter balance pocket 52 and is applied to balance barrier film 50.Being applied to sealing surfaces 58 is that equate and relative with power on the balance barrier film 50, thereby the influence of the operation of fluid input pressure fluid flow dynamic control device 10 is minimized.
Go out as shown, in conventional control unit 40, one or more pressure induction channels 56 comprise one or more bending channels with intake section 56a, and the central shaft A of these passages and control unit 40 be arranged in parallel, and spaced apart from the central shaft A outward radial of control unit 40.In some forms, the intake section 56a of one or more pressure induction channels 56 can comprise a plurality of circumferential spaced perforations that extends through valve plug 42.In another form, one or more pressure induction channels 56 can comprise single intake section 56a, and it is limited by the single hollow cylindrical gap between inside and outside 42a, the 42b of the concentric locating that is arranged on valve plug 42.As directed, in any case, intake section 56a carries out the transition to one or more radially inside targeting part 56b, and then to one or more axially directed part 56c, arrive one or more radially outward targeting part 56d then, arrive counter balance pocket 52 at last, to apply force to the top surface of balance barrier film 50.
Though aforementioned conventional balance valve port control unit 12 fully is sent to counter balance pocket 52 with pressure under most of operational circumstances, its performance can descend under high relatively entrance pressure.For instance, with reference to Fig. 3, show up to the roughly test of 8 bar entrance pressure (being the pressure at entrance 18 places of valve body 16), the conventional assembly 12 of Fig. 2 provides the rated flow of stable increase.Yet when entrance pressure rises to when being higher than roughly 8 bar, rated flow begins to descend, and this may not expect.
Therefore, Fig. 4 shows a kind of form of balance ports control unit 112, and it is according to principles of construction of the present disclosure and be installed in the valve body 16 of fluid flow control device 10 of Fig. 1.Control unit 112 is similar to the control unit of describing with reference to Fig. 2 12 and constructs, and wherein various exceptions will be described.Go out as shown, control unit 112 comprises port housing 114, control unit 116 and balance barrier film 118.Port housing 114 defines central cylindrical shape opening 120, and control unit 116 is slidably disposed in the opening 120 along its center longitudinal axis A.Control unit 116 comprises valve plug 122 and valve rod 124.Valve plug 122 is threaded io an end of valve rod 124 via plug-in connector 126 and the threaded fastener 128 that passes the center hole 130 of valve plug 122.Balance barrier film 118 is connected between port housing 114 and the control unit 116 in known manner, to limit the counter balance pocket 132 of port housing 114 inboards.In more detail, in disclosed form, balance barrier film 118 comprises the relative first and second surperficial 118a, 118b, first surface 118a with respect to the orientation of Fig. 4 upwards towards, thereby define the lower surface of counter balance pocket 132.
Valve plug 122 comprises outer piston part 122a and radially is arranged on the inner carrier part 122b of outer piston part 122a inside.In form shown in Figure 4, control unit 116 defines pressure induction labyrinth 134, it provides at the sealing surfaces 136 of valve plug 122 and the fluid between the counter balance pocket 132 and has been communicated with, thereby the first surface 118a to sealing surfaces 136 and balance barrier film 118 applies equal and the first and second relative power separately in the operating process of device 10.In Fig. 4, pressure induction labyrinth 134 comprises at least one first pressure induction channels 138, and it is by by plug-in connector 126 threaded fastener 128 that valve plug 122 is anchored on valve rod 124 being limited.More specifically, threaded fastener 128 comprises hole 140, and at least a portion hole defines the first pressure induction channels 138.That is to say that hole 140 comprises the 140a of first portion that extends into fastening piece 128 from the head 142 of fastening piece 128 along the central shaft A of control unit 116.Hole 140 also comprises perpendicular to the 140a of first portion and from the second portion 140b of the radial sidewalls of its fastening piece 128 that extends radially outwardly out.Therefore, as what can find out, the 140a of first portion at least of through hole 140 forms the first pressure induction channels 138 in pressure induction labyrinth 134, and it is positioned at the center of valve plug 122 and extends through center hole 130 at it when counter balance pocket 132 is extended.As further shown, when the second portion 140b in hole 140 appears at the sidewall of fastening piece 128, it carries out the transition to or is communicated to one or more first radially outward targeting parts 144 in pressure induction labyrinth 134, and then to the one or more axially directed part 146 in pressure induction labyrinth 134, arrive one or more second radially outward targeting parts 148 in pressure induction labyrinth 134 then, arrive counter balance pocket 132 at last, apply power with the first surface 118a to balance barrier film 118.In disclosed form, one or more first radially outward targeting parts 144 can be limited by the gap between the internal valve plug portion 122b that is axially disposed within plug-in connector 126 and valve plug 122.And one or more axially directed parts 146 and one or more second radially outward targeting part 148 can limit by forming (for example machining) one or more holes in plug-in connector 126.Other structures of control unit 116 and the various passages in labyrinth 134 all fall in the scope of the present disclosure.
Further illustrate as Fig. 4, the pressure induction labyrinth 134 of this form of balance ports control unit 112 also comprises at least one second pressure induction channels 150, it extends through valve plug 122, and in more detail, it is arranged between outer valve plug part 122a and the internal valve plug portion 122b.At least one second pressure induction channels 150 can be restricted to the exterior radial surface 152 of internal valve plug portion 122b and outside between the inner radial surface 154 of valve plug part 122a.In some forms, at least one second pressure induction channels 150 can comprise a plurality of in valve plug 122 circumferential isolated hole, each hole and the first pressure induction channels 138 be arranged in parallel and are spaced apart away from the first pressure induction channels, 138 outward radials, therefore, these holes are same parallel and spaced apart with its radially outward with the center longitudinal axis A of control unit 116.In other forms, at least one second pressure induction channels 150 can comprise hollow cylindrical gap or the interval that is arranged between internal valve plug portion 122b and the outer valve plug part 122a.Do not consider concrete structure, the remainder that at least one second pressure induction channels 150 directly is communicated with one or more first radially outward targeting parts 144 and responds to labyrinth 134 in the mode that is similar to the above-mentioned first pressure induction channels 128 along pressure is communicated to counter balance pocket 132.Yet in embodiment shown in Figure 4, at least one second pressure induction channels 150 is blocked or sealing, makes fluid can not pass the remainder in labyrinth 134.Comprise that in the second pressure induction channels 150 in a kind of mode of execution in hollow cylindrical gap, for example the sealed member 156 of O type ring can be arranged in the second pressure induction channels 150 as shown in the figure.Comprise in other forms of a plurality of upright openings that at least one second pressure induction channels 150 sealed member 156 can comprise a plurality of ball sealers or fill in the other materials in independent hole.Do not consider concrete structure, sealed member 150 provides the fluid-tight seal between the inner radial surface 154 of the exterior radial surface 152 of internal valve plug portion 122b and outer valve plug part 122a.Because at least one second pressure induction channels 150 is aforesaid sealed, only the first pressure induction channels 138 provides via the fluid of labyrinth 134 to counter balance pocket 132 and is communicated with.
Because the disclosed balance ports control unit 112 of Fig. 4 is by as described structure, test showing the conventional assembly 12 improved performance characteristicses of describing with respect to reference Fig. 2.For example, Fig. 5 shows the comparison of schematic form between the control unit 112 (dotted line) among conventional control unit 12 (solid line) and Fig. 4.As what can find out, along with the entrance pressure of the control unit 112 of Fig. 4 increases, rated flow continues to increase and not because any decline that High Voltage causes.It is gratifying that continuing to increase on this capacity used for great majority.
Though the valve plug 122 in the balance ports control unit 112 of this form shown in Fig. 4 has at least one the second pressure induction channels 150 that is sealed by one or more sealed members 156, the alternative form of valve plug 122 can be constructed to not have at least one second pressure induction channels 150.Therefore, can will be appreciated that the form shown in Fig. 4 can obtain simply by revising the conventional control unit 12 shown in Fig. 2.For instance, from the control unit 12 of Fig. 2, one or more sealed members 156 can be inserted into one or more intake section 56a and seal one or more pressure induction channels 56 thus.In addition, the conventional fasteners that valve plug 42 is fastened to valve rod 44 shown in Fig. 2 can be removed and be replaced by the fastening piece 128 that reference Fig. 4 describes.By structure like this, fastening piece 128 can provide the first required pressure induction channels 138, thereby the fluid that is provided to the expectation of counter balance pocket 54 is communicated with.Therefore, it can be seen that the disclosure also provides and has been used for ressembling or straightforward procedure and/or the means of the conventional assembly 12 of upgrading.
Fig. 6 shows another form of the balance ports control unit 112 of Fig. 4, and unique difference is sealed member 156 at least one second pressure induction channels 150 from pressure induction labyrinth 134 is removed.By setting like this, the fluid pressure at sealing surfaces 136 places of valve plug 122 can freely be communicated with together with the counter balance pocket 132 at least one second pressure induction channels 150 and the port housing 114 via the first pressure induction channels 138.
Because the disclosed balance ports control unit 112 of Fig. 6, test shows the conventional assembly 12 described with respect to reference Fig. 2 and with respect to the balance ports control unit 112 improved performance characteristicses of Fig. 4.For example, Fig. 7 shows the comparison of schematic form between the control unit 112 (dotted line) among control unit 112 (dotted line) among conventional control unit 12 (solid line), Fig. 4 and Fig. 6.As what can find out, be similar to the control unit of Fig. 4, along with the entrance pressure of the control unit 112 of Fig. 6 increases, rated flow continues to increase and not because any decline that High Voltage causes.Aforesaid, it is gratifying that continuing to increase on this capacity used for great majority.In addition, than the control unit of Fig. 4, the control unit of Fig. 6 also shows total rated capacity of the contrast entrance pressure of the rated capacity that is comparable to conventional control unit 12.Therefore, except the advantage that the rated capacity that continues to increase is provided, the still onset under the higher nominal capacity of the control unit 112 of Fig. 6, this equally can be satisfactory for some situation.
Though control unit 112 described here is described to comprise fastening piece 128, it defines the hole 140 as the part in pressure induction labyrinth 134 of extending along the center longitudinal axis A of control unit 116, and other distortion also are comprised in the scope of the present disclosure.For example, in some form of assembly 112, valve plug 122 and valve rod 124 can be constructed to the member of one, thereby do not need fastening piece 128.In such example, the first pressure induction channels 138 is defined as along the hole 140 that center longitudinal axis A extends and can directly be formed in the control unit 116 by machining or other modes.
Therefore, should be able to will be appreciated that from aforementioned content that balance ports control unit 112 (Fig. 4 and Fig. 6) has advantageously provided and contrasted variation the continuing to increase aspect rated flow that comprises the entrance pressure that is higher than 8 bar.This has just guaranteed the in most of the cases exercisable performance of optimum.In addition, than the form of Fig. 4, the control unit of Fig. 6 provides continuing to increase of higher nominal capacity generally, thus the real account flow setting type of similar conventional balance valve port control unit 12.
Claims (21)
1. a fluid regulating device is characterized in that, comprising:
Valve body, it defines entrance, exports and is arranged on the valve port between described entrance and the described outlet;
The port housing, it is arranged in the described valve body and limits central cylindrical shape opening;
Control unit, it is at least part of be slidably disposed in the described central cylindrical shape opening of described port housing and be suitable for along the central shaft of described control unit the operating position that engages described valve port and and the isolated open position of described valve port between be shifted, wherein said control unit comprises valve rod and is coupled to the valve plug of described valve rod, described valve plug defines sealing surfaces, when described control unit was in described operating position, described sealing surfaces was suitable for the described valve port of sealing engagement;
The balance barrier film, it is coupled between described control unit and the described port housing, and described balance barrier film has the first relative membrane surface and second membrane surface;
Counter balance pocket, it is arranged in the part of the described port housing between described first membrane surface of the internal surface of described port housing and described balance barrier film; And
The first pressure induction channels, it extends through described valve plug and is communicated with described counter balance pocket fluid, make fluid pressure on the described sealing surfaces of described valve plug equal the fluid pressure in the described counter balance pocket, so that the described sealing surfaces of described valve plug and described first membrane surface of described balance barrier film are applied equal and opposite first power and second power respectively, the described first pressure induction channels has the intake section that extends through described valve plug along the central shaft of described control unit.
2. fluid regulating device according to claim 1, it is characterized in that, described valve plug also comprises the center hole that extends along the described central shaft of described control unit, and be arranged in the described center hole and described valve plug is fixed to the valve plug fastening piece of described valve rod, described valve plug fastening piece limits at least a portion of the described intake section of the described first pressure induction channels.
3. fluid regulating device according to claim 1 and 2, it is characterized in that described valve plug comprises that outer valve plug partly, radially is arranged on the inboard internal valve plug portion of described outer valve plug part and is arranged on the outer wall of described internal valve plug portion and at least one center-aisle between the described outer valve plug inwall partly.
4. fluid regulating device according to claim 3 is characterized in that, described at least one center-aisle defines at least one the second pressure induction channels that extends through described valve plug and be communicated with described counter balance pocket fluid.
5. fluid regulating device according to claim 3 is characterized in that, also comprises sealed member, its be arranged in described at least one center-aisle and described internal valve plug portion is provided and described outer valve plug portion branch between fluid-tight seal.
6. fluid regulating device according to claim 3 is characterized in that, described at least one center-aisle comprises the hollow cylindrical interval that is arranged between described internal valve plug portion and the described outer valve plug portion branch.
7. fluid regulating device according to claim 6 is characterized in that, described sealed member comprises the O type ring that is arranged in the described hollow cylindrical interval.
8. balance ports control unit that is used for fluid flow control device is characterized in that described control unit comprises:
The port housing, it defines central cylindrical shape opening;
Valve rod, it has center longitudinal axis and at least part of being arranged in the described port housing, is used for moving back and forth along described center longitudinal axis;
Valve plug, the sealing surfaces that it is coupled to described valve rod and limits the valve port that is suitable for the described fluid flow control device of selectivity sealing engagement;
The balance barrier film, it operationally is coupled between described valve plug and the described port housing, and described balance barrier film has the first relative membrane surface and second membrane surface;
Counter balance pocket, it is limited in the part of the described port housing between described first membrane surface of the internal surface of described port housing and described balance barrier film; And
The first pressure induction channels, it extends through described valve plug and is communicated with described counter balance pocket fluid, make fluid pressure on the described sealing surfaces of described valve plug equal the fluid pressure in the described counter balance pocket, so that the described sealing surfaces of described valve plug and described first membrane surface of described balance barrier film are applied equal and opposite first power and second power respectively, the described first pressure induction channels has the intake section that extends through described valve plug along the described center longitudinal axis of described valve rod.
9. control unit according to claim 8, it is characterized in that, described valve plug also comprises the center hole that extends along the described central shaft of described control unit, and be arranged in the described center hole and described valve plug is fixed to the valve plug fastening piece of described valve rod, described valve plug fastening piece limits at least a portion of the described intake section of the described first pressure induction channels.
10. according to Claim 8 or 9 described control units, it is characterized in that described valve plug comprises that outer valve plug partly, radially is arranged on the inboard internal valve plug portion of described outer valve plug part and is arranged on the outer wall of described internal valve plug portion and at least one center-aisle between the described outer valve plug inwall partly.
11. control unit according to claim 10 is characterized in that, described at least one center-aisle defines at least one the second pressure induction channels that extends through described valve plug and be communicated with described counter balance pocket fluid.
12. control unit according to claim 10 is characterized in that, also comprises sealed member, its be arranged in described at least one center-aisle and described internal valve plug portion is provided and described outer valve plug portion branch between fluid-tight seal.
13. control unit according to claim 10 is characterized in that, described at least one center-aisle comprises the hollow cylindrical interval that is arranged between described internal valve plug portion and the described outer valve plug portion branch.
14. control unit according to claim 13 is characterized in that, described sealed member comprises the O type ring that is arranged in the described hollow cylindrical interval.
15. a balance ports control unit that is used for fluid flow control device is characterized in that described control unit comprises:
The port housing, it defines central cylindrical shape opening;
Valve rod, it has center longitudinal axis and at least part of being arranged in the described port housing, is used for moving back and forth along described center longitudinal axis;
Valve plug, the sealing surfaces that it is coupled to described valve rod and limits the valve port that is suitable for the described fluid flow control device of selectivity sealing engagement;
The balance barrier film, it operationally is coupled between described valve plug and the described port housing, and described balance barrier film has the first relative membrane surface and second membrane surface;
Counter balance pocket, it is limited in the part of the described port housing between described first membrane surface of the internal surface of described port housing and described balance barrier film;
Pressure induction labyrinth, its at least part of described sealing surfaces and connection of the fluid between the described counter balance pocket that limits and provide described valve plug by described valve plug, make fluid pressure on the described sealing surfaces of described valve plug equal the fluid pressure in the described counter balance pocket, so that the described sealing surfaces of described valve plug and described first membrane surface of described balance barrier film are applied equal and opposite first power and second power respectively, described pressure induction labyrinth comprises at least one first pressure induction channels, and the described first pressure induction channels extends into described valve plug along the described central shaft of described control unit from described sealing surfaces.
16. control unit according to claim 15, it is characterized in that, described pressure induction labyrinth also comprises at least one second pressure induction channels that described sealing surfaces that described valve plug is provided and the fluid between the described counter balance pocket are communicated with, and at least a portion of described at least one second pressure induction channels is limited by described valve plug and is parallel to the described first pressure induction channels setting.
17. control unit according to claim 16 is characterized in that, described valve plug comprises outer valve plug part and radially is arranged on the inboard internal valve plug portion of described outer valve plug part.
18. control unit according to claim 17, it is characterized in that, the described first pressure induction channels in described pressure induction labyrinth is set up passes described internal valve plug portion, and described at least one second pressure induction channels in described pressure induction labyrinth is arranged between described internal valve plug portion and the described outer valve plug portion branch.
19. according to claim 17 or 18 described control units, it is characterized in that, described at least one second pressure induction channels comprise between the inner cylindrical surface of the outside cylindrical surface that is limited at described internal valve plug portion and described outer valve plug part hollow cylindrical at interval.
20. control unit according to claim 16 is characterized in that, also comprises sealed member, it is arranged in described at least one second pressure induction channels and fluid-tight seal is provided.
21. control unit according to claim 15, it is characterized in that, described valve plug also comprises the center hole that extends along the described central shaft of described control unit, and be arranged in the described center hole and described valve plug is fixed to the valve plug fastening piece of described valve rod, described valve plug fastening piece limits at least a portion of the intake section of the first pressure induction channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205105468U CN203189816U (en) | 2012-09-28 | 2012-09-28 | Fluid adjusting device and balance port control assembly therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205105468U CN203189816U (en) | 2012-09-28 | 2012-09-28 | Fluid adjusting device and balance port control assembly therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203189816U true CN203189816U (en) | 2013-09-11 |
Family
ID=49106676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205105468U Expired - Lifetime CN203189816U (en) | 2012-09-28 | 2012-09-28 | Fluid adjusting device and balance port control assembly therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203189816U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711914A (en) * | 2012-09-28 | 2014-04-09 | 艾默生过程管理调节技术公司 | Balance valve for fluid regulator |
| CN104534140A (en) * | 2014-12-30 | 2015-04-22 | 特瑞斯能源装备股份有限公司 | Balancing device of pressure regulator |
-
2012
- 2012-09-28 CN CN2012205105468U patent/CN203189816U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711914A (en) * | 2012-09-28 | 2014-04-09 | 艾默生过程管理调节技术公司 | Balance valve for fluid regulator |
| CN104534140A (en) * | 2014-12-30 | 2015-04-22 | 特瑞斯能源装备股份有限公司 | Balancing device of pressure regulator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20130911 |