CN1152682A - Pressure balance valve - Google Patents
Pressure balance valve Download PDFInfo
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- CN1152682A CN1152682A CN96112285A CN96112285A CN1152682A CN 1152682 A CN1152682 A CN 1152682A CN 96112285 A CN96112285 A CN 96112285A CN 96112285 A CN96112285 A CN 96112285A CN 1152682 A CN1152682 A CN 1152682A
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- valve
- hole
- fluid
- equilibrated
- source
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- 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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/072—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members
- F16K11/074—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members with flat sealing faces
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- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
- Control Of Fluid Pressure (AREA)
- Sliding Valves (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
A pressure equalization valve for alternatingly equalising pressures between a first fluid source and at least two second fluid sources is disclosed. The pressure equalization valve includes includes a first port in fluid communication with the first fluid source and at least two second ports in fluid communication with the at least two second fluid sources, respectively, and a valve gate movable between a first equalizing position, wherein the valve gate allows fluid flow through one of the second ports and restrains fluid low through another of the second ports to equalize substantially the fluid pressure between the first fluid source and one of the second fluid sources, and a second equalizing position, wherein the valve gate restrains fluid flow through the one of the second ports and allows fluid flow through the other of the second ports to equalize substantially the fluid pressure between the first fluid source and another of the second fluid sources. The valve further includes a chamber in the valve body between the first port and the second ports.
Description
The present invention relates to be used for the device of balance hydrodynamic pressure.The present invention be more particularly directed to be used for the equilibrium valve of the hydrodynamic pressure between a plurality of fluid sources of balance.
Fig. 1 is the schematic representation of a prior art material handling system.An air door is one as air door 1 and by means of gravity flying dust or other dry free flowing granule is sent to another pressure area from a pressure area.For example, in the system of Fig. 1, particle is collected in the hopper 2 of a top, and the operation by pneumatic valve 3 falls into air door 1 with the particle of certain controlled quentity controlled variable.By means of the operation of another pneumatic valve 4, the particle of each controlled quentity controlled variable drops in the dispatch tube 5 that has pressure transmission fluid such as air supply.Air in the dispatch tube is compressed to 20psi usually, but can be compressed to 25psi.
Because pressure transmits the pressure of fluid usually above the approaching atmospheric pressure in the air door 1, if pressure imbalance, the pressure difference particle that can slow down enters into the motion of pipeline 5 from air door 1.Therefore, the material handling system of prior art system as shown in FIG. 1 generally includes an equilibrated valve 6.
Fig. 1 and Fig. 2-3 described two kinds of prior art equilibrium valves 6 ', 6 ".Each equilibrium valve 6 ', 6 " comprise respectively a hole 7 ', 7 ", communicate with air door 1 through a fluid pipe-line 7, hole 8 ', 8 ", communicate with dispatch tube 5 at a 5a place through a fluid pipe-line 8; and hole 9 ', 9 " and, communicate with hopper 2 through a fluid pipe-line 9.Each equilibrium valve 6 ', 6 " also comprise respectively valve 10 ', 10 ", respectively by driver 11 ', 11 " operation, respectively conversion ground blind hole 8 ', 9 ' and 8 ", 9 ".
Equilibrium valve 6,6 ', 6 " common following operations.Before a certain amount of particle fell into air door 1 from hopper 2, valve 3,4 was in the closed position.Driver 11 ', 11 " residing position be hole 8 ', 8 " close, hole 9 ', 9 " open.Like this, hopper 2 and air door 1 communicate, and the pressure of air is almost equal in the pressure of hopper 2 endoparticles top and the air door 1, and near barometric pressure.By opening and timing cut-off valve 3, a certain amount of particle falls into air door 1.Then, driver 11 ', 11 " operation make hole 8 ', 8 " open, hole 9 ', 9 " close.Dispatch tube 5 communicates with air door 1 at a 5a place like this, and the much higher air pressure at dispatch tube 5 mid point 5a places no better than of the air pressure in the air door 1.Usually pressure is not exclusively equal, because exist pressure drop in the system.Depend on the capacity of air door 1, whole pressure balance process is no more than 5～15 seconds usually.
By opening valve 4, particle falls into dispatch tube 5 at a 5c place, and is transported away by pipe 5.The air pressure that should be noted that the 5c place is than the air pressure at 5a place much lower (also being like this in the air door 1), because be provided with an aperture 5b between the some 5a of pipe 5 and 5c.The pressure drop that produces between air door and the some 5c makes particle intake channel 5.When valve 4 cut out, some residual particles were stayed in the air door 1 usually.Driver 11 ', 11 " correspondingly operation close closed pore 8 ', 8 ", open hole 9 ', 9 ", like this air door and hopper communicate and air door 1 in air pressure and the approaching atmospheric air pressure balance in the hopper 2.In each pressure balance process and since between dispatch tube 5 and the air door 1 and the air pressure difference between air door 1 and the hopper 2 was very big afterwards, therefore pass through equilibrium valve 6 ', 6 " air velocity almost can reach the velocity of sound.In addition, in the pressure balance process between air door 1 and hopper 2, flow through equilibrium valve 6 ', 6 " air take away a certain amount of loose sand from air door 1 usually, these air/granulate mixtures are when flow at high speed, it is very serious to wear and tear.
The equilibrated valve 6 of prior art ', 6 " exist serious deficiency.At first, this valve 6 ', 6 " wear rate is very high, particularly consider valve port 9 ', 9 " and valve 10 ', 10 " and driver 11 ', 11 ", they are the particle in the face of carrying under one's arms in the air stream near the velocity of sound circularly.According to estimates, the wear rate of these parts and v
2Be directly proportional, wherein v equals the speed of air particles mixture.For some prior art equilibrium valves 6, coming into operation, just to need in three months to change be very usual.
And, as valve 6 ', 6 " equilibrated valve be like this design, when driver 11 '; 11 " operate between the closing position of hole when mobile, corresponding for some time hole 8 ', 9 ' and hole 8 "; 9 " open, allow air door 1, pressure balance simultaneously between hopper 2 and the delivery pipe 5.In the system of the vacuumizing opposite with pressure system shown in Figure 1, this instantaneous threeway balance can cause particle is drawn in the negative pressure pump, increases the maintenance of this pump.
Find out from above, the purpose of this invention is to provide a kind of improved equilibrated valve.
Another object of the present invention provides the lower equilibrated valve of a kind of wear rate.
Another object of the present invention provides a kind of equilibrated valve that suppresses the transient equilibrium of unintentional fluid source.
Another object of the present invention provides a kind of equilibrated valve with wear-resistant inner member.
Another object of the present invention provides a kind of equilibrated valve that has for ease of maintenaince with the inner member of changing.
The purpose that above purpose and other are not enumerated is finished according to equilibrated valve of the present invention by a kind of, alternately the pressure between the first-class body source of balance and at least two second fluid sources.Equilibrated valve of the present invention comprises a valve body, and this valve body comprises first hole that communicates with first-class body source and at least two second holes that communicate with at least two fluid sources respectively;
A valve can be in first equilibrium position, be that described valve allows fluid to flow through described second hole and limit fluid flows through another described second hole, the position of the hydrodynamic pressure between first-class body source in a basic balance and one second fluid source, with second equilibrium position, be that described valve limit fluid flows through this described second hole and allows to flow through this another described second hole, rotate between the position of the hydrodynamic pressure between first-class body source in a basic balance and another second fluid source.This valve also comprises the chamber between described first hole and described second hole in this valve body, measures in the plane perpendicular to the central shaft in described first hole, and the cross section of a maximum of the described chamber minimum cross-section than described first hole basically is big.
Purpose of the present invention can also be finished by the equilibrated valve of pressure between a kind of alternately first-class body source of balance and two second fluid sources at least, it comprises a valve body, this valve body comprises first hole that communicates with first-class body source and at least two second holes that communicate with at least two fluid sources respectively, the control fluid flows through flowing of described second hole, allow the fluid alternating current to cross second hole, rather than simultaneously, the device of pressure between the first-class body source of balance and second fluid source alternately, and between described first hole and described second hole, link to each other in the described valve body be used for reducing the device of fluid from described first hole to the flowing velocity at least one second hole.
Preferred embodiment of the present invention is described in more detail with reference to the accompanying drawings, and same element adopts identical label.Wherein:
Fig. 1 is the schematic representation of prior art processing system;
Fig. 2 is the sectional view of prior art equilibrated valve;
Fig. 3 is the sectional view of another prior art equilibrated valve;
Fig. 4 is equilibrated valve first an embodiment's of the present invention plan view;
Fig. 5 is the sectional view of the V-V along the line of Fig. 4;
Fig. 6 is the sectional view of the VI-VI along the line of Fig. 4;
Fig. 7 is the sectional view of the VII-VII along the line of Fig. 6;
Fig. 8 is the equilibrated valve second embodiment's of the present invention view similar in appearance to Fig. 6.
With reference to Fig. 4-7, the equilibrated valve 16 that combines with first embodiment of the invention comprises a valve body 18, one first hole 22 communicates as the air in the air door in the material handling system of Fig. 11 with first-class body source, with a pair of second hole 24,26 respectively with a pair of second fluid source such as hopper 2 in air and the pressurized air in the delivery pipe 5 communicate.As shown in Figure 5, first wall 28, the second holes 24,26 that first hole 22 is positioned at valve body 18 are positioned at second wall 30 of valve body 18, and wherein second wall is over against first wall.In addition, the central shaft A in one first hole 22 and the central shaft B in one second hole 24 (see Fig. 5 and Fig. 6) on the same line, and second hole 26 with respect to this line into about 10-15 degree angle, thereby the central shaft C in second hole 26 is with respect on the about 10-15 degree of axle A along the line, and extends into first hole, 26 (see figure 5)s.The significance of these characteristics will be described further below.
Valve 16 comprises that also a piston 32 and cylinder (not shown) are slidingly connected and makes piston 32 and connecting rod 34 hinged by a pin 36.Connecting rod 34 is hinged by pin 40 and connecting rod 38, and connecting rod 38 is fixed on the rotating dog 42, suppresses the rotation of connecting rod 38 with respect to rotating dog 42.In valve body 18, a valve actuator 44 is fixed to and makes valve actuator 44 be suppressed with respect to the rotation of placing pin 42 on the rotating dog 42.This can find out from Fig. 6 and Fig. 7, and valve actuator 44 is triangular in shape substantially and comprise the void column 46 of a pair of extension.An elongated avette valve 50 is made by Ni-based hard material (ground Ni-hard) preferably and is had pair of columnar extension 52 and makes column extension 52 be slidingly mounted in the void column 46 of extension.The void column 46 of each extension comprises a spring, as ring spring 56, makes valve 50 depart from valve actuator 44.Valve body 18 comprises that further a seat board 58 makes and be fixed on the internal surface of second wall 30 by Ni-based hard material (ground Ni-hard) preferably.Seat board 58 has pair of openings 60,62 and 24,26 forms coplane valve seats 64,66 in two second holes.Because valve 50 departs from valve actuator 44 by spring, so it also departs from seat board 58.This will be described further below, and the effect of valve 50 is that control fluid alternating current is crossed second hole 24,26.
Valve 16 used all materials have 750 grades.
Structure and operation with reference to first embodiment of Fig. 1 and Fig. 4-7 pair equilibrated valve 16 describe.As mentioned above, first hole 22 communicates with first-class body source usually, as communicating by the air in fluid pipe-line 7 and the air door 1, one second hole 24 communicates with one second fluid source usually, as communicating with hopper 2 by pipeline 9, and another second hole 26 communicates with another second fluid source usually, as communicating with delivery pipe 5 by pipeline 8.One first equilibrium position, valve actuator 44 and valve 50 rotate the 80-85 degree clockwise substantially from position shown in Figure 7.Valve 50 is biased in by spring and is used for closing opening 62 on the valve seat 66 and makes fluid can not flow through second hole 26, allows to flow through second hole 24.If valve 16 is used in the system shown in Figure 1, a certain amount of particle enters the air door 1 from hopper 2 in wait, and then valve 50 is in first equilibrium position.Hopper 2 and air door 1 communicate like this, and the air pressure and the air pressure in the air door 1 of particle top are almost equal in the hopper 2, near atmospheric pressure.Drop in the air door 1 by means of valve 3 a certain amount of particles then.
When piston 32 withdrawals, spurred connecting rod clockwise at 34,38 o'clock as Fig. 4, clockwise rotate rotating dog 42 as Fig. 4, the rotation of rotating dog 42 (Fig. 7 is for counterclockwise) makes valve actuator 44 and valve 50 rotate counterclockwise around rotating dog 42 as Fig. 7.Valve 50 moves to the neutral position from first equilibrium position, and valve 50 is biased on the valve seat 64,66 by spring, and two openings 60,62 are closed, and limit fluid flows through second hole 24,26.Move to this point from valve 50, valve 50 keeps being biased on the valve seat 64 by spring, but continuous motion makes valve 50 slide through opening 66,, is biased on the valve seat 64 by spring in second equilibrium position until valve 50, closes opening 60.In second equilibrium position, as shown in Figure 7, valve seat 50 limit fluid flow through second hole 24, and allow to flow through second hole 26, the hydrodynamic pressure between first-class body source in a basic balance and another second fluid source.If valve 16 is used in the system of Fig. 1, delivery pipe 5 will communicate with air door 1, and the air pressure in the air door 1 equals the much higher air pressure in the delivery pipe 5 substantially.Owing to exist pressure to fall in the system, so the common incomplete equilibrium of pressure.By means of valve 4, particle drops in the delivery pipe 5 then, is transported by pipe 5.
When piston 32 and valve actuator 44 carried out opposite operation, valve 50 moves back to by the neutral position and comes first equilibrium position, fluid can not flow through second hole 26, allows to flow through second hole 24, makes the pressure between the first-class body source and second fluid source in a basic balance.If valve 16 is used in the system of Fig. 1, air door 1 and hopper 2 will communicate once more, and the approaching atmospheric air pressure in air pressure in the air door 1 and the hopper 2 is in a basic balance.
In each pressure balance process, owing to wish the first-class body source of existence and the very big pressure difference between second fluid source usually, enter into the liquid speed of chamber 70 in the valve body 18, for example enter from first hole 22, almost can reach the velocity of sound.But owing to measure in the plane perpendicular to the central shaft A in first hole 22, the maximum cross-section area of chamber 70 is greater than the smallest cross-section area in first hole 22, and fluid flows to second hole and will decrease as the speed in second hole 24 from first hole 22.
This result is by group's flow velocity degree equation regulation, and it shows that working as a fluid flows through an airtight space, and speed and fluid density that the cross-section area in this space multiply by fluid equal a constant.Like this, assumed density remains unchanged, if the cross-section area in this space increases, the speed of fluid will reduce pro rata.When the fluid that flows through valve 16 comprises particulate matter in gas, find that particulate matter remains in the gas usually by chamber 70 time.Though like this because the normal pressure loss in the pipeline and in the valve 16, fluid density reduces not obvious, it is constant relatively that fluid density keeps.Therefore, the cross-section area that increases of chamber 70 shows as the speed that fluid flows through chamber 70 and reduces relatively.In the reality test, find that a valve includes the chamber with a maximum cross-section area, is roughly the smallest cross-section area in 14 times first hole, has improved the wear rate of prior art equilibrated valve.According to estimates, the liquid speed that flows through in such valve reduces by 14 times from first hole to second hole.As mentioned above, believe the variation and the v of wear rate
2Be directly proportional, and can reduce by 2.744 times at the valve actuator and the wear rate on the valve of this valve according to estimates.Owing to be the index relation between speed and the wear rate, believe chamber 70 with a maximum cross-section area, be roughly the smallest cross-section area in 10 times first hole 22, with reducing the speed that fluid flows through chamber, produce good wear rate result.Estimating of fluid speed reduces about 10 times in such valve, and the reduction of wear rate is near 10
2
In addition, believe second hole 24,26 on second wall 30 to first hole 22, thereby second hole 24,26 center line B, C or on the center line A in first hole or become 10-15 degree angle with it, be provided with and extend into first hole 22 like this and can help to reduce the wearing and tearing of valve inner piece because second hole 24, such setting of 26, from first orifice flow to, second hole 24 or 26, or the fluid relative current line style ground that flows to first hole 22 from one second hole 24 or 26 flows through valve 16, makes internal valve member less be come from the wearing and tearing of carrying under one's arms the particle in fluid like this.In addition, because seat board 58 and valve 50 made by Ni-based hard material (ground Ni-hard), more wear-resistant.
Should see,, make fluid can not flow through two second holes 24 and 26 because valve 50 arrives the neutral position, when valve is mobile between first equilibrium position and second equilibrium position, the transient equilibrium between valve 16 restrictions second fluid source.When valve 16 is used in the negative pressure system, this characteristic is used for limiting the particle of carrying under one's arms in fluid and flows into negative pressure pump, thereby has reduced the wearing and tearing of pump and the maintenance of pump.
Another advantage of the present invention comes from the structure of valve 16.Specifically, referring to Fig. 4 and 6, the second holes 24,26, connecting rod 34,38, rotating dog 42, valve actuator 44 sharp valves 50 all are directly to install or be installed to indirectly on second wall of valve body 18, and second wall 30 is installed to the remaining part of valve body 18 by 6 bolts.Therefore, valve actuator 44 and valve 50 can keep in repair and change at an easy rate, only need to make piston 32 to break away from pin 36, unclamp bolt 31, take off second wall 30.
Fig. 8 has represented second embodiment of equilibrated valve 116 of the present invention, and valve 116 and valve 16 identical parts adopt identical numbering.The structure of valve 116 is identical with valve 16 with effect, has only some exception.Specifically be that valve 116 comprises a long door 180 that can take off, and valve 116 can be maintained at the scene.Removable door 180 at the scene in emergency circumstances of great use.
Will be appreciated that various fluids can be represented widely in the term " fluid " that is used in specification and the claim, comprises a kind of gas, a kind of gas/solid mixture, a kind of gas/liquid mixture, perhaps a kind of liquid.In addition, any group of streams can be represented widely in term used herein " fluid source ", comprises the very high or low-down group's stream of pressure, as in negative pressure system.It should also be appreciated that hole 22,24,26 is described as and valve body 18 one, but they can be the separating parts that is fixed on the valve body 18, perhaps can comprise the streamline terminal that is fixed on the valve body 18h.And, though being described as with valve body, seat board 58 and valve seat 64,66 separate, seat board 58 can take off from valve 16, makes valve seat 64,66 comprise the terminal in hole 24,26.In such embodiments, hole 24,26th, coplane.And, though coming the operation equipment of mobile valve 50 to be expressed as, operating valve driver 44 comprises a piston 32, connecting rod 34,38 and rotating dog 42, but other operation equipment can use as a revolving driver, and can obtain beneficial effect of the present invention.
Principle of the present invention has been described, most preferred embodiment and mode of operation in the explanation in front.But the invention that will protect is not limited to disclosed certain embodiments.Therefore embodiment is illustrative, rather than determinate.Do not leave theme of the present invention and can make various changes.Therefore, the various theme of claim qualification of the present invention and the scopes that the change in the scope belongs to the claim protection of falling into.
Claims (19)
1. equilibrated valve of pressure between the first-class body source of balance and at least two second fluid sources alternately comprises:
A valve body, this valve body comprise first hole that communicates with first-class body source and at least
Two second holes that communicate with at least two fluid sources respectively;
A valve can be in first equilibrium position, and promptly described valve allows fluid to flow through one
Described second hole and limit fluid flow through another described second hole, and be in a basic balance first-class
The position of the hydrodynamic pressure between body source and one second fluid source, with second equilibrium position,
Be that described valve limit fluid flows through this described second hole and allows to flow through this another institute
State second hole, the fluid between first-class body source in a basic balance and another second fluid source is pressed
Rotate between the position of power; With
Chamber in this valve body between described first hole and described second hole is vertically
In the plane of the central shaft in described first hole, measure a maximum of described chamber transversal
Face is bigger 10 times than the minimum cross-section in described first hole at least.
2. according to a kind of equilibrated valve of claim 1, it is characterized in that the maximum cross section of described this chamber is bigger 14 times than the minimum cross-section in described first hole.
3. according to a kind of equilibrated valve of claim 1, it is characterized in that the line that overlaps with the central shaft in described two second holes extends into described first hole.
4. according to a kind of equilibrated valve of claim 1, it is characterized in that described valve can further move to a neutral position between first equilibrium position and second equilibrium position, state the valve limit fluid in this place and flow through two described second holes.
5. according to a kind of equilibrated valve of claim 4, it is characterized in that described valve body comprises that further a valve seat is in each described second hole, its described valve is elongated, and when this elongated valve during in described primary importance this valve extend through a described valve seat, when this valve extends through another described valve seat during in the described second place, and, extend through two valve seats when this valve during in described neutral position.
6. according to a kind of equilibrated valve of claim 4, it is characterized in that described valve seat is a coplane.
7. according to a kind of equilibrated valve of claim 1, it is characterized in that also comprising:
A valve actuator, described valve are slidably connected on the valve actuator and are inclined to one side by spring
Put away from described valve actuator; With
Operate described valve actuator mobile institute between first equilibrium position and second equilibrium position
State the device of valve.
8. according to a kind of equilibrated valve of claim 7, it is characterized in that described valve body comprises that a valve seat is in each described second hole, its described valve is elongated, and when this elongated valve during in described primary importance this valve extend through a described valve seat and be biased on this valve seat by spring, when this valve extends through during in the described second place and is biased in another described valve seat by spring, and, extend through and be biased in two valve seats by spring when this valve during in described neutral position.
9. according to a kind of equilibrated valve of claim 1, it is characterized in that described valve body comprises a door, so that carry out the inside maintenance of valve.
10. equilibrated valve of pressure between the first-class body source of balance and at least two second fluid sources alternately comprises:
A valve body, this valve body comprise first hole that communicates with first-class body source and at least
Two second holes that communicate with at least two fluid sources respectively;
The control fluid flows through flowing of described second hole, allows the fluid alternating current to cross second hole,
Replace the device of pressure between the first-class body source of balance and second fluid source; With
The reduction that is used for that links to each other between described first hole and described second hole in the described valve body is flowed
The device of body from described first hole to the flowing velocity at least one second hole.
11., it is characterized in that described speed reduces the flowing velocity of device reduction from described first hole to described one second hole and is at least 10 times according to a kind of equilibrated valve of claim 10.
12. a kind of equilibrated valve according to claim 10, it is characterized in that described speed reduces device and comprises the chamber that connects described first hole and described second hole in the valve body, measure in the plane perpendicular to the central shaft in described first hole, the cross section of a maximum of described chamber is bigger 10 times than the minimum cross-section in described first hole at least.
13., it is characterized in that the maximum cross section of described this chamber is bigger 14 times than the described cross section in described first hole according to a kind of equilibrated valve of claim 12.
14., it is characterized in that the line that overlaps with the central shaft in described two second holes extends into described first hole according to a kind of equilibrated valve of claim 12.
15. a kind of equilibrated valve according to claim 10, it is characterized in that described control gear comprises a valve, it can be in first equilibrium position, be that described valve allows fluid to flow through described second hole and limit fluid flows through another described second hole, the position of the hydrodynamic pressure between first-class body source in a basic balance and one second fluid source, with second equilibrium position, be that described valve limit fluid flows through this described second hole and allows to flow through this another described second hole, rotate between the position of the hydrodynamic pressure between first-class body source in a basic balance and another second fluid source.
16. a kind of equilibrated valve according to claim 15, it is characterized in that described valve body is included in the valve seat in each described second hole, its described valve is elongated, and when this elongated valve during in described primary importance this valve extend through a described valve seat, when this valve extends through another described valve seat during in the described second place, and, extend through two valve seats when this valve during in described neutral position.
17. a kind of equilibrated valve according to claim 15 is characterized in that also comprising:
The drive unit of described valve, described valve is slidably mounted on described drive unit
On, and be biased away from described drive unit by spring; With
Operate described drive unit mobile institute between first equilibrium position and second equilibrium position
State the device of valve.
18. a kind of equilibrated valve according to claim 17, it is characterized in that described valve body comprises: the valve seat in each described second hole, its described valve is elongated, and when this elongated valve during in described primary importance this valve extend through a described valve seat and be biased on this valve seat by spring, when this valve extends through during in the described second place and is biased in another described valve seat by spring, and, extend through and be biased in two valve seats by spring when this valve during in described neutral position.
19. according to a kind of equilibrated valve of claim 10, it is characterized in that described valve body comprises a door, so that carry out the inside maintenance of valve.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US50174095A | 1995-08-09 | 1995-08-09 | |
| US08/501,740 | 1995-08-09 | ||
| US08501740 | 1995-08-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1152682A true CN1152682A (en) | 1997-06-25 |
| CN1070597C CN1070597C (en) | 2001-09-05 |
Family
ID=23994837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96112285A Expired - Fee Related CN1070597C (en) | 1995-08-09 | 1996-08-09 | Pressure balance valve |
Country Status (6)
| Country | Link |
|---|---|
| KR (1) | KR100413121B1 (en) |
| CN (1) | CN1070597C (en) |
| AU (1) | AU722683B2 (en) |
| CA (1) | CA2182843C (en) |
| TW (1) | TW365638B (en) |
| ZA (1) | ZA966759B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU500478B2 (en) * | 1976-09-14 | 1979-05-24 | U. J Lehtinen | Shutoff valve having adjustable closure member force |
| US4273152A (en) * | 1979-02-09 | 1981-06-16 | Freeman Murray E | Control valve assembly with onstream seal removal feature |
| AU542973B2 (en) * | 1981-05-29 | 1985-03-28 | Kamyr Inc. | High pressure feeding |
| US4634675A (en) * | 1983-12-29 | 1987-01-06 | New Brunswick Scientific Co., Inc. | Agitator for a fermentation and tissue culturing vessel |
| AU8022894A (en) * | 1994-11-28 | 1995-09-28 | Malcolm Christopher Kearton | Improvements in or relating to the electrical control of large diameter fluid valves, used in the control of trade waste or similar |
-
1995
- 1995-08-15 TW TW084108487A patent/TW365638B/en not_active IP Right Cessation
-
1996
- 1996-08-07 CA CA002182843A patent/CA2182843C/en not_active Expired - Lifetime
- 1996-08-08 ZA ZA9606759A patent/ZA966759B/en unknown
- 1996-08-09 AU AU62019/96A patent/AU722683B2/en not_active Ceased
- 1996-08-09 CN CN96112285A patent/CN1070597C/en not_active Expired - Fee Related
- 1996-08-09 KR KR1019960033132A patent/KR100413121B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AU722683B2 (en) | 2000-08-10 |
| AU6201996A (en) | 1997-02-13 |
| CA2182843A1 (en) | 1997-02-10 |
| CN1070597C (en) | 2001-09-05 |
| TW365638B (en) | 1999-08-01 |
| CA2182843C (en) | 2004-10-12 |
| KR100413121B1 (en) | 2004-04-03 |
| ZA966759B (en) | 1998-02-09 |
| KR970011526A (en) | 1997-03-27 |
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Applicant after: Daimon Dynamic International Co., Ltd. Applicant before: The Babcock & Wilcox Co., Ltd. |
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