EP0393800B1 - Valve device - Google Patents
Valve device Download PDFInfo
- Publication number
- EP0393800B1 EP0393800B1 EP90201568A EP90201568A EP0393800B1 EP 0393800 B1 EP0393800 B1 EP 0393800B1 EP 90201568 A EP90201568 A EP 90201568A EP 90201568 A EP90201568 A EP 90201568A EP 0393800 B1 EP0393800 B1 EP 0393800B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- seat
- fluid
- chamber
- seats
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1002—Ball valves
- F04B53/1015—Combinations of ball valves working in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/06—Pumps having fluid drive
- F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1002—Ball valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/141—Intermediate liquid piston between the driving piston and the pumped liquid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
Description
- The present invention relates to a valve device.
- The flow of fluid in pumps is limited and controlled by various types of valve devices. Figures 8 and 9 show a valve device used on plunger pumps, a type of pump which is often used for high-pressure applications.
- This valve device is constituted of a
tubular seat 100, a valve-piece 102 provided with a surroundingflange 101, and avalve spring 103 which urges the valve-piece 102 against theseat 100. - Because plunger pumps are used to pump materials such as cement clinker, in the conventional valve device solid particles entrained in the fluid may be caught between the valve-
piece 102 and theseat 100. - The tubular shape of the
seat 100 used in the conventional valve device makes it easy for solid particles to pass through; in addition, because theseat 100 and the valve-piece 102 are made of metal the operation of the valve device may be adversely affected by solid particles that are caught therebetween. The result is that it has sometimes been impossible to pump a constant amount of fluid at a constant rate, so that operation of the pump was accompanied by a decline in efficiency. Furthermore, solid particles caught between theseat 100 and the valve-piece 102 can damage the seat and valve-piece, leading to leakage of fluid. Conventionally, therefore, the valve device has to be replaced at this point, which interrupts operations. - EP-A-0 309 240 (which claims an earlier priority date than the present application but was published after any priority date of the present application) discloses a valve device for preventing inflow of solid particles present in fluid and increasing the durability of the device. Such a valve device (see Figures 10 and 11) comprises a
seat 107 having avalve seat 104 formed as aconcave surface 105 corresponding to part of a spherical surface, and a prescribed number offluid passages 106 which are formed in theseat 107 and open into theconcave surface 105. There are also a valve-piece 108 that has a surface corresponding to the shape of theconcave surface 105 of thevalve seat 104, and avalve cover 110 andspring retainer 111 that maintain the valve-piece 108 on theconcave surface 105 of theseat 107 via avalve spring 109. In the valve device thus configured, at least one of theseat 107 and the valve-piece 108 is either formed of, or covered with, a hard resilient material, or one is formed of a hard resilient material and the other is covered with a hard resilient material. In addition, wood may be used instead of the hard resilient material. - With the valve device thus configured, the
fluid passages 106 formed in theseat 107 have a small diameter which makes it difficult for solid particles to pass therethrough. Even if solid particles should pass through thefluid passages 106 and get caught between theseat 107 and the valve-piece 108, the resilience of the valve seat and/or the valve-piece ensures that the functioning of the valve device will be not obstructed. - However, a valve device thus configured is less adequate for pumping at higher pressures because increasing the amount being pumped causes the valve-
piece 108 to vibrate during the inflow of fluid. - BE-A- 520 270 discloses a valve device having the pre-characterising features of claim 1. US-A-1 092 782, US-A-3 298 320 and US-A-3 664 770 each discloses a valve device in which a plurality of fluid passages are provided before a valve seat but the valve seat is not spherically concave and the passages do not terminate at the valve seat surface but at a space before that surface.
- According to the present invention, there is provided a valve device comprising:-
- (a) a seat member in a face of which are formed a plurality of valve seats spaced at regular intervals around the edge;
- (b) a plurality of fluid passages in said seat member;
- (c) a plurality of valve pieces, each of the valve pieces being in a respective one of said valve seats and each having a spherical surface; and
- (d) a valve housing provided with resilient means that resiliently presses the spherical surfaces of the valve pieces on to the surfaces of the respective ones of the valve seats, characterised in that:-
- (e) each of said seats is of a concave shape with a surface that corresponds to part of a spherical surface, the spherical surface of each of the valve pieces corresponding to the surface of the respective valve seat; and
- (f) for each of said valve seats there is a respective plurality of such fluid passages in and through the seat member which communicate with and terminate at said surface of the valve seat.
- The present invention will now be described, by way of example, with reference to the accompanying drawings, in which:-
- Figure 1 is a cross-sectional view of an embodiment of an ultrahigh pressure pump;
- Figure 2 is a cross-sectional view of a valve device according to an example of the present invention for the pump;
- Figure 3 is a perspective view of the valve device of Figure 2 shown disassembled;
- Figure 4 is a plan view of the valve housing shown in Figure 3;
- Figure 5 is a cross-sectional view taken along line A--A of Figure 4;
- Figure 6 is a plan view of the seat member shown in Figure 2;
- Figure 7 is a cross-sectional view taken along line A--A of Figure 6;
- Figures 8 and 9 are a sectional view and a disassembled perspective view of a conventional valve device; and
- Figures 10 and 11 are a sectional view and a disassembled perspective view of a valve device not in accordance with the present invention.
- In Figure 1 ultrahigh fluid pump apparatus for use in a cement mill for example comprises a
valve box 2 provided with a valve chamber 1, a plunger box 4 provided with aplunger 3, and abox 5 forming apressure action chamber 5a disposed between thevalve box 2 and the plunger box 4. - The
valve box 2 has aninlet passage 6 and anoutlet passage 7 that communicate with the valve chamber 1 and which are provided with aninlet valve 80 and anoutlet valve 81, respectively. - A side wall 2a of the
valve box 2 is provided with apassage 17 that connects the pressure-action chamber 5a with the valve chamber 1. As explained below, the position of thepassage 17 is determined according to the difference in specific gravity between aliquid 28 and the fluid 14 to be pumped so that the latter does not enter thepressure action chamber 5a. When the liquid has a higher specific gravity than the fluid, thepassage 17 is located at a higher position in the pressure-action chamber 5a, and when the liquid has a lower specific gravity thepassage 17 is positioned lower. In the illustrated example, the position where thepassage 17 opens into the pressure-action chamber 5a is higher than the inlet of the valve chamber 1. Thus, the position of thepassage 17 is determined according to the relationship between the heights of the pressure-action chamber 5a and the valve chamber 1 and a consideration of the specific gravities of the liquid and the fluid 14. - The end of the
plunger 3 maintained within thecylinder 21 in the plunger box 4 via V-packing 22 projects into thepressure action chamber 5a and is reciprocated at high speed by a drive means (not illustrated). - A
resilient membrane 23 is provided in the pressure-action chamber 5a to divide the pressure-action chamber 5a into acylinder 21 side A and a valve chamber 1 side B. Thecylinder 21 side A of theresilient membrane 23 is filled with anoperating medium 25, such as oil, via anoil passage 24 of the plunger box 4. In addition, the valve chamber 1 side B of thepressure action chamber 5a and part of thepassage 17 are filled withliquid 28, such as oil, which has a lower specific gravity than the fluid 14 and does not mix with the fluid 14. Theliquid 28 comes into contact with the fluid 14 part-way along thepassage 17. - Provided between the
pressure action chamber 5a and thepassage 17 is ascreening member 29 that uses a mesh screen, for example, to prevent particles that exceed a given size from entering the pressure-action chamber 5a. Thescreening member 29 may be formed as an integral part of thevalve box 5 which forms the pressure-action chamber 5a, and thepassages 20 therein are set at a downward inclination toward thepassage 17 side. - With the above configuration, suction operation of the
plunger 3 causes theresilient membrane 23 to contract, reducing the volume of thecylinder 21 side A of the pressure-action chamber 5a and increasing the volume on the valve chamber 1 side B. The change in volume results in a rise in the level of theliquid 28 in thepassage 17. Also, an amount of fluid 14 corresponding to the change in volume flows into the valve chamber 1 as theinlet valve 80 opens. The expulsion operation of theplunger 3 causes theresilient membrane 23 to expand via theoperating medium 25, and with the reduction in the volume of the valve chamber 1 side B theliquid 28 in the valve chamber 1 side B of the pressure-action chamber 5a is expelled. Also, the level of theliquid 28 in the passage 18 decreases and a corresponding amount of fluid 14 is forced out as theoutlet valve 81 opens. Theliquid 28 is only forced part-way along thepassage 17 and does not flow over to the valve chamber 1 side. - As shown in Figures 2 to 7, the
inlet valve 80 and theoutlet valve 81 each has aseat member 84 in theface 82 which are formed a multiplicity of valve seats 83 (eight, in the illustrated example) spaced at regular intervals around the edge, each being shaped into a concave form that corresponds to part of a spherical surface; spherical valve-pieces 85 arranged on thevalve seats 83; and avalve housing 87 that presses the valve-pieces 85 onto thevalve seats 83 by means ofsprings 86. - For each of the
valve seats 83 in theseat member 84 there are formed multiple fluid passages 88 (three in each case, in the illustrated example) that extend axially through theseat member 84 and communicate with and terminate at the valve seat surface. Disposed around the edge of thevalve housing 87 arefluid passages 89 corresponding to thevalve seats 83 and in which the valve-pieces 85 fit. The exit end of each of thefluid passages 89 is formed into a smaller diameter portion by alip 90. One end of each of thevalve springs 86 is held at thelip 90. - The
valve housing 87 andseat member 84 are provided with respective central bolt through-holes bolt 93 and anut 94. - In addition to metal, the valve-
pieces 85 and/or theseat member 84 may be made of, or covered with, a hard resilient material such as synthetic resin, for example. - With the above configuration, when suction operation of the
plunger 3 causes theresilient membrane 23 to contract, reducing the volume on thecylinder 21 side A of the pressure-action chamber 5a, the result is that the valve-pieces 85 of theinlet valve 80 open against the resistance of thesprings 86, and fluid 14 flows into the valve chamber 1. At this time, the valve-pieces 85 of theoutlet 81 are drawn in the direction of their closed positions, and therefore remain closed. Before the fluid can flow into the valve chamber 1, entrained particles that exceed a given size are removed by thefluid passages 88 and then by the screeningmember 29. - The expulsion operation of the
plunger 3 expands theresilient membrane 23, causing fluid 14 that has entered the valve chamber 1 to open theoutlet valve 81 and be pumped out. - Because the operation of the
valves pieces 85, vibration accompanying the opening and closing action of the valves can be prevented and when applied to pumps can provide reliable valve function and increased durability, compared with conventional arrangements.
Claims (1)
- A valve device comprising:-(a) a seat member (84) in a face (82) of which are formed a plurality of valve seats (83) spaced at regular intervals around the edge;(b) a plurality of fluid passages (88) in said seat member;(c) a plurality of valve pieces (85), each of the valve pieces being in a respective one of said valve seats and each having a spherical surface; and(d) a valve housing (87) provided with resilient means (86) that resiliently presses the spherical surfaces of the valve pieces on to the surfaces of the respective ones of the valve seats, characterised in that:-(e) each of said seats is of a concave shape with a surface that corresponds to part of a spherical surface, the spherical surface of each of the valve pieces corresponding to the surface of the respective valve seat; and(f) for each of said valve seats there is a respective plurality of such fluid passages in and through the seat member which communicate with and terminate at said surface of the valve seat.
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP68882/88 | 1988-03-23 | ||
JP63068882A JP2557250B2 (en) | 1988-03-23 | 1988-03-23 | Fluid pumping device |
JP77076/88 | 1988-03-30 | ||
JP63077076A JP2632540B2 (en) | 1988-03-30 | 1988-03-30 | Fluid pumping equipment |
JP103232/88 | 1988-04-26 | ||
JP63103232A JPH07113426B2 (en) | 1988-04-26 | 1988-04-26 | Valve device |
EP89302606A EP0343773B1 (en) | 1988-03-23 | 1989-03-16 | Fluid pump apparatus and valve device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89302606.2 Division | 1989-03-16 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0393800A2 EP0393800A2 (en) | 1990-10-24 |
EP0393800A3 EP0393800A3 (en) | 1990-11-07 |
EP0393800B1 true EP0393800B1 (en) | 1994-08-17 |
Family
ID=27299893
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90201568A Expired - Lifetime EP0393800B1 (en) | 1988-03-23 | 1989-03-16 | Valve device |
EP90201581A Expired - Lifetime EP0390298B1 (en) | 1988-03-23 | 1989-03-16 | Fluid pump apparatus |
EP89302606A Expired - Lifetime EP0343773B1 (en) | 1988-03-23 | 1989-03-16 | Fluid pump apparatus and valve device |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90201581A Expired - Lifetime EP0390298B1 (en) | 1988-03-23 | 1989-03-16 | Fluid pump apparatus |
EP89302606A Expired - Lifetime EP0343773B1 (en) | 1988-03-23 | 1989-03-16 | Fluid pump apparatus and valve device |
Country Status (5)
Country | Link |
---|---|
EP (3) | EP0393800B1 (en) |
KR (1) | KR0181711B1 (en) |
AU (1) | AU626838B2 (en) |
CA (1) | CA1338102C (en) |
DE (3) | DE68917587T2 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5368454A (en) * | 1992-07-31 | 1994-11-29 | Graco Inc. | Quiet check valve |
DE19604132C2 (en) * | 1996-02-06 | 2000-04-13 | Hammelmann Paul Maschf | High pressure plunger pump, preferably for working pressures above 2,000 bar |
WO1999018573A1 (en) * | 1997-10-02 | 1999-04-15 | Sony Corporation | Recording/reproducing device and recording/reproducing method |
SE518114C2 (en) * | 1998-09-28 | 2002-08-27 | Asept Int Ab | Pumping device for pumping liquid food |
US20110030213A1 (en) * | 2009-08-07 | 2011-02-10 | Weir Spm, Inc. | Hydraulic installation tool for pump plunger |
US9822894B2 (en) | 2013-11-26 | 2017-11-21 | S.P.M. Flow Control, Inc. | Valve seats for use in fracturing pumps |
CN106050596B (en) * | 2016-06-07 | 2018-05-25 | 神华集团有限责任公司 | Plunger metering pump |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR959521A (en) * | 1950-03-31 | |||
BE520270A (en) * | ||||
GB272374A (en) * | 1926-09-21 | 1927-06-16 | Nouvelle Soc Des Ateliers Patt | Improvements in mud pumps |
DE805006C (en) * | 1950-01-20 | 1951-05-04 | Westfalia Dinnendahl Groeppel | Diaphragm pump |
US3298320A (en) * | 1965-05-17 | 1967-01-17 | Little Inc A | Atraumatic fluid pump |
US3363580A (en) * | 1966-01-19 | 1968-01-16 | Denver Equip Co | Multiple valve pump |
US3520643A (en) * | 1968-10-22 | 1970-07-14 | Passavant Werke | Sewage pump or the like |
US3664770A (en) * | 1970-02-18 | 1972-05-23 | Golden Arrow Mfg Ltd | Diaphragm pumps |
JPS5018604B1 (en) * | 1971-06-24 | 1975-07-01 | ||
US3802807A (en) * | 1972-06-02 | 1974-04-09 | Precision Control Prod Corp | Pump |
US4378183A (en) * | 1980-09-18 | 1983-03-29 | The Pittsburgh & Midway Coal Mining Co. | Apparatus and method for pumping hot, erosive slurry of coal solids in coal derived, water immiscible liquid |
FR2512123A1 (en) * | 1981-08-27 | 1983-03-04 | Scumra | MEMBRANE VOLUMETRIC PUMP FOR FRAGILE PARTICLE SUSPENSIONS |
EP0238380B1 (en) * | 1986-02-20 | 1989-10-25 | Saint Gobain Vitrage International | Pumping of high viscosity materials |
JPH0198773A (en) * | 1987-09-22 | 1989-04-17 | Yoshinobu Koiwa | Valve device |
-
1989
- 1989-03-16 DE DE68917587T patent/DE68917587T2/en not_active Expired - Fee Related
- 1989-03-16 EP EP90201568A patent/EP0393800B1/en not_active Expired - Lifetime
- 1989-03-16 EP EP90201581A patent/EP0390298B1/en not_active Expired - Lifetime
- 1989-03-16 EP EP89302606A patent/EP0343773B1/en not_active Expired - Lifetime
- 1989-03-16 DE DE89302606T patent/DE68910726T2/en not_active Expired - Fee Related
- 1989-03-16 DE DE68920306T patent/DE68920306T2/en not_active Expired - Fee Related
- 1989-03-18 KR KR1019890003401A patent/KR0181711B1/en not_active IP Right Cessation
- 1989-03-21 CA CA000594378A patent/CA1338102C/en not_active Expired - Fee Related
- 1989-03-22 AU AU31606/89A patent/AU626838B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
DE68920306D1 (en) | 1995-02-09 |
KR890014899A (en) | 1989-10-25 |
EP0390298B1 (en) | 1994-12-28 |
CA1338102C (en) | 1996-03-05 |
EP0390298A2 (en) | 1990-10-03 |
DE68920306T2 (en) | 1995-05-18 |
EP0393800A2 (en) | 1990-10-24 |
AU639071B2 (en) | 1993-07-15 |
DE68917587T2 (en) | 1994-12-15 |
DE68910726T2 (en) | 1994-03-24 |
EP0390298A3 (en) | 1990-10-31 |
AU626838B2 (en) | 1992-08-13 |
DE68910726D1 (en) | 1993-12-23 |
EP0343773B1 (en) | 1993-11-18 |
KR0181711B1 (en) | 1999-05-01 |
DE68917587D1 (en) | 1994-09-22 |
AU7113391A (en) | 1991-05-02 |
EP0393800A3 (en) | 1990-11-07 |
AU3160689A (en) | 1989-09-28 |
EP0343773A1 (en) | 1989-11-29 |
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