EP0012467B1 - Pompe - Google Patents

Pompe Download PDF

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Publication number
EP0012467B1
EP0012467B1 EP19790200708 EP79200708A EP0012467B1 EP 0012467 B1 EP0012467 B1 EP 0012467B1 EP 19790200708 EP19790200708 EP 19790200708 EP 79200708 A EP79200708 A EP 79200708A EP 0012467 B1 EP0012467 B1 EP 0012467B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
pump
inlet
outlet
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
Application number
EP19790200708
Other languages
German (de)
English (en)
Other versions
EP0012467A1 (fr
Inventor
Albert Charles Hersom
Kenneth William Wright
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe des Produits Nestle SA
Original Assignee
Societe des Produits Nestle SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB7928618A external-priority patent/GB2038929B/en
Application filed by Societe des Produits Nestle SA filed Critical Societe des Produits Nestle SA
Publication of EP0012467A1 publication Critical patent/EP0012467A1/fr
Application granted granted Critical
Publication of EP0012467B1 publication Critical patent/EP0012467B1/fr
Expired legal-status Critical Current

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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
    • F04B3/00—Machines or pumps with pistons coacting within one cylinder, e.g. multi-stage
    • 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
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time

Definitions

  • the present invention relates to a pump, more particularly to a pump intended for metering and mixing a relatively thick fluid, or a suspension of solid particles in a liquid with, for example, another liquid.
  • a mixing pump is known from DE-B-1173805 in which a differential piston has three different diameters in three different chambers.
  • the displaced volume in the first chamber, into which liquid is drawn, is larger than the displaced volume in the second chamber in which the liquid passes from the first chamber.
  • the liquid is therefore forced into a third chamber into which a dispersion or suspension is drawn, and the liquid mixes with the latter.
  • the pump according to the present invention comprises a cylinder having a first inlet; a second inlet and an outlet, means for closing communication between the cylinder and the first inlet and between the cylinder and the outlet, and, inside the cylinder, two relatively movable pistons each having at least one port provided with one or more valves.
  • communication between the cylinder and either the first inlet or the outlet is closed by a distributor valve, and at least one of the pistons is provided with a non-return valve.
  • one piston has a port which is closable by a spring-loaded valve.
  • the pump comprises a cylinder 1 in which two pistons 2 and 3 are able to reciprocate.
  • Piston 2 is mounted on a piston-rod 4
  • piston 3 is mounted on a tube 5 coaxial with the piston-rod 4.
  • Piston-rod 4 and tube 5 are actuated independently by means not represented (for example by air cylinders). In another embodiment, they are actuated and synchronised by cams. Adjustable stops limit the stroke of the pistons.
  • Piston 2 is provided with a central port which is normally held closed by a valve 6 by means of a spring coaxial with piston-rod 4.
  • piston 2 is mounted on piston-rod 4 and the valve 6 is actuated by independent means.
  • Piston 3 comprises several ports having non-return valves 7 which enable a liquid to flow only from right to left in the drawing.
  • Cylinder 1 comprises two inlets preferably under adequate pressure, a first one 8 for a thick fluid or a suspension and a second one 9 for a liquid.
  • the cylinder also comprises an outlet 10 through which the resulting mixture of diluate flows.
  • a rotatable distributor valve 11 at the end of the cylinder 1 enables to select alternatively the communication between the cylinder and the first inlet 8 ( Figure 1) or the cylinder and the outlet 10 ( Figure 2).
  • This distributor valve is actuated according to the movement of the pistons 2 and 3 by means not represented, as will be explained hereunder.
  • the first inlet 8 is provided with a non-return valve which enables fluid to flow into the cylinder, but prevents it from flowing out through the inlet.
  • Outlet 10 is provided with a non-return valve which enables the resulting mixture or diluate to flow out of the cylinder but stops suction in.
  • Distributor valve 11 is then rotated to provide a communication between cylinder 1 and outlet 10 ( Figure 2) and the pistons move the other way) i.e. from right to left in the drawing).
  • the non-return valves 7 close and piston-rod 4 opens valve 6.
  • the portion of liquid which was contained between the two pistons passes through piston 2 and mixes with the fluid.
  • the passage of the mixture through the outlet 10 is substantially completed and the cycle starts again.
  • 12a and 12b may be regarded as two parts of one cylinder 12 at right angles to each other.
  • the pump comprises two inlets preferably under adequate pressure, the first, 13, for a thick fluid or a suspension and the second, 14, for a liquid. It also comprises an outlet 16 through which the resulting mixture or diluate flows, a rotatable distributor valve 17 closing a port at the end of the part 12b (left on the drawing), thus providing communication between the cylinder and either the inlet 13 (as shown in Figure 3) or the outlet 16 (as shown in Figure 4).
  • This distributor valve is actuated in synchronism with the movements of piston 18 reciprocating in the part 12a of the cylinder and of piston 19 reciprocating in the part 12b of the cylinder.
  • the piston 18 is mounted on a piston rod 20 and is actuated by means (not represented) such as for example an air cylinder connected to the piston rod 20.
  • the piston 19 is mounted on a piston rod 21 and is normally held at the right end of the part 12b of the cylinder by means of a coil spring coaxial with the piston rod 21. Stops limit the travel of the pistons.
  • the piston 18 has several ports provided with non-return valves which only enable a liquid to flow through the piston when the latter is moving upwards.
  • the piston 19 has a central port provided with a valve 22 which is normally held closed by a coil spring. This valve 22 is connected to a plate 23 located in a chamber inside the piston; the chamber communicates with the part 12b of the cylinder by ports in the right hand wall of the piston.
  • the distributor valve 17 is then turned to the position shown in Figure 4, providing a communication between cylinder 12 and outlet 16.
  • the piston 18 moves downwards, its non-return valves close, liquid is drawn into the cylinder through inlet 14 and piston 19 is moved to the left by the liquid between pistons 18 and 19 until it reaches its left stop.
  • Pressure of the liquid on the plate 23 then opens the valve 22 ( Figure 4) and the liquid passes through the central port of the piston 19 towards the outlet 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Accessories For Mixers (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Claims (6)

1. Pompe pour mesurer et mélanger un fluide relativement épais, ou une suspension de particules solides dans un liquide, avec un liquide, comprenant un cylindre (1; 12) ayant un premier orifice d'admission (8, 13), un second orifice d'admission (9; 14) et un orifice de sortie (10: 16), des moyens (11; 17) pour fermer la communication entre le cylindre (1; 12) et le premier orifice d'admission (8; 13) et entre le cylindre et l'orifice de sortie (10; 16) et, dans le cylindre, deux pistons mobiles (2, 3; 18, 19), pompe caractérisée par le fait que chaque piston est mobile par rapport à l'autre et a au moins un orifice de passage muni d'une ou plusieurs soupapes (6, 7; 22).
2. Pompe selon la revendication 1 caractérisée par le fait que la communication entre le cylindre et soit le premier orifice d'admission, soit l'orifice de sortie est fermé par un distributeur.
3. Pompe selon la revendication 1 caractérisée par le fait que la communication entre le cylindre et l'orifice de sortie peut être fermé par un distributeur rotatif actionné.
4. Pompe selon la revendication 1 caractérisée par le fait qu'au moins un orifice d'admission et l'orifice de sortie sont munis chacun d'une soupape de retenue.
5. Pompe selon la revendication 1 caractérisée par le fait qu'un piston a un orifice de passage qui peut être fermé par une soupape rappelée par un ressort.
6. Pompe selon la revendication 1 caractérisée par le fait qu'au moins un des pistons est muni d'une soupape de retenue.
EP19790200708 1978-12-14 1979-12-03 Pompe Expired EP0012467B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB7848526 1978-12-14
GB4852678 1978-12-14
GB7901504 1979-01-16
GB7901504 1979-01-16
GB7928618A GB2038929B (en) 1978-12-14 1979-08-16 Mixing pump
GB7928618 1979-08-16

Publications (2)

Publication Number Publication Date
EP0012467A1 EP0012467A1 (fr) 1980-06-25
EP0012467B1 true EP0012467B1 (fr) 1982-05-12

Family

ID=27260643

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790200708 Expired EP0012467B1 (fr) 1978-12-14 1979-12-03 Pompe

Country Status (5)

Country Link
EP (1) EP0012467B1 (fr)
CA (1) CA1160101A (fr)
DE (1) DE2962850D1 (fr)
DK (1) DK147605C (fr)
ES (1) ES486844A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2553849C1 (ru) * 2014-02-10 2015-06-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Вологодская государственная молочнохозяйственная академия имени Н.В. Верещагина" Поршневой насос-дозатор

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2089440B (en) * 1980-12-16 1984-08-01 Nestle Sa Pump
DK112386D0 (da) * 1986-03-11 1986-03-11 On Computer Electronics A S Indretning samt fremgangsmaade til dosering af vaeskeformigt medie
ATE71058T1 (de) * 1987-08-20 1992-01-15 Tecalemit Gmbh Deutsche Abgabegeraet fuer minaraloelprodukte.
GB2318839B (en) * 1993-12-10 1998-07-15 White Consolidated Ind Inc Viscous material dispenser and method for dispensing
FI108472B (fi) 1999-07-29 2002-01-31 Bent Johan Larsen Íljynsiirtopumppu
CN103291576B (zh) * 2013-05-13 2016-04-13 嘉善海力达工具有限公司 套缸式高低压柱塞泵
CN104895756B (zh) * 2015-05-29 2017-03-15 四川泛水基电液机械有限责任公司 一种新型超高压流体泵

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR451277A (fr) * 1912-08-21 1913-04-15 William Mortimer Melmore Perfectionnements dans les appareils à comprimer l'air ou les gaz
DE575142C (de) * 1926-07-30 1933-04-24 George Dean Kolbenfluessigkeitsmesspumpe
US2365234A (en) * 1940-09-17 1944-12-19 Sullivan Machinery Co Pump mechanism
GB651482A (en) * 1945-07-11 1951-04-04 Humphrey S Railways Inc Improvements in or relating to reciprocating pumps
US2497300A (en) * 1947-01-29 1950-02-14 Du Pont Floating piston pump
DE1173805B (de) * 1959-10-02 1964-07-09 Bran & Luebbe Tauchkolbendosierpumpe zum Foerdern und Vermischen von zwei Fluessigkeiten
DE1786127A1 (de) * 1968-08-21 1971-11-25 Benz & Hilgers Gmbh Dosiereinrichtung
US3894405A (en) * 1973-11-07 1975-07-15 Gustav B Mielitz Refrigeration unit
US4093108A (en) * 1974-07-11 1978-06-06 Carl Schleicher & Schull Syringe adapted to overcome a pressure resistance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2553849C1 (ru) * 2014-02-10 2015-06-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Вологодская государственная молочнохозяйственная академия имени Н.В. Верещагина" Поршневой насос-дозатор

Also Published As

Publication number Publication date
ES486844A1 (es) 1980-05-16
DE2962850D1 (en) 1982-07-01
CA1160101A (fr) 1984-01-10
DK147605C (da) 1985-04-22
DK481979A (da) 1980-06-15
EP0012467A1 (fr) 1980-06-25
DK147605B (da) 1984-10-15

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