EP0138927B1 - Pompe a piston pour milieux liquides contamines par des matieres solides - Google Patents

Pompe a piston pour milieux liquides contamines par des matieres solides Download PDF

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Publication number
EP0138927B1
EP0138927B1 EP84901346A EP84901346A EP0138927B1 EP 0138927 B1 EP0138927 B1 EP 0138927B1 EP 84901346 A EP84901346 A EP 84901346A EP 84901346 A EP84901346 A EP 84901346A EP 0138927 B1 EP0138927 B1 EP 0138927B1
Authority
EP
European Patent Office
Prior art keywords
piston pump
pump
check valves
discharge chamber
chamber
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
EP84901346A
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German (de)
English (en)
Other versions
EP0138927A1 (fr
Inventor
Ernst Korthaus
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT84901346T priority Critical patent/ATE29272T1/de
Publication of EP0138927A1 publication Critical patent/EP0138927A1/fr
Application granted granted Critical
Publication of EP0138927B1 publication Critical patent/EP0138927B1/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
    • 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
    • F04B53/1037—Flap valves
    • F04B53/1047—Flap valves the valve being formed by one or more flexible elements
    • F04B53/106—Flap valves the valve being formed by one or more flexible elements the valve being a membrane
    • F04B53/1065—Flap valves the valve being formed by one or more flexible elements the valve being a membrane fixed at its centre
    • 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
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous

Definitions

  • the invention relates to a piston pump for liquid media contaminated by solids, with a pump piston, which can be pushed back and forth in a pump cylinder, on the interior of which, with the interposition of oppositely operating check valves, a suction chamber having the suction port of the piston pump and a pressure chamber having the pressure port of the piston pump are connected.
  • the pressure chamber is usually arranged above the pump cylinder.
  • the check valves (pressure valves) assigned to the pressure chamber are always arranged at the highest point of the interior.
  • the pressure port on the pressure chamber usually opens out above the pump cylinder. This design was previously considered mandatory because it can prevent air bubbles from remaining in the pump interior. The air bubbles escaping from the aspirated liquid, or those which have been directly sunk, cannot collect in the pump housing, but are removed by the higher pressure valves. In this way, in the event of counterpressure, the danger should be countered that the piston pump compresses the sucked-in air without performing pumping work.
  • a disadvantage of the known piston pumps of the type mentioned is that they are relatively easily clogged by solid particles carried in the liquid to be pumped. This has disadvantages especially when dirty media, such as. B. dirty water to be promoted on construction sites or the like. The solid particles get relatively easily through the intake valves with the intake flow and then remain in the space between the intake valves and the pressure valves because they cannot follow the rapidly increasing delivery flow. This applies in particular to those solid parts that are specifically significantly heavier than the pumped medium, such as. B. stones, sand or the like contained in dirty water. For this reason, in piston pumps of the type mentioned, separators for stones or other coarse dirt are usually installed in the suction line.
  • the invention proposes starting from a piston pump of the type mentioned that the suction chamber, the pump cylinder and the pressure chamber are arranged side by side in a horizontal or only slightly inclined plane, that the check valves are arranged side by side in the same horizontal or slightly inclined plane and that the pressure port opens at the bottom of the pressure chamber.
  • the pumped medium flows on the paths through the suction chamber to the suction valve, from the suction valve to the delivery cylinder, from the delivery cylinder to the pressure valve and through the pressure chamber to the pressure port, essentially horizontal or only gently rising delivery paths, so that it is ensured that the solid parts be conveyed on the floor of the horizontal conveying paths on a rolling or sliding basis.
  • a preferred embodiment of the piston pump according to the invention provides that the pressure port extends from the underside of the pressure chamber to the top thereof and is provided in the area of the top with a small cross-section vent opening opening into the pressure chamber.
  • the vent opening at the top of the pressure chamber prevents air from accumulating in the pressure chamber, which could enter the pump cylinder due to leaks in the pressure valves.
  • the pressure port naturally has one Cross-section that is smaller or at least not larger than that of the suction nozzle, so that despite the increasing conveying path, proper removal of solids sucked in and conveyed by the pump is guaranteed.
  • pressure port extends from the underside of the pressure chamber, runs horizontally or slightly increases, and the pressure chamber is provided with a vent valve on the top.
  • the vent valve ensures that air is removed from the pressure chamber. Due to the fact that the pressure port runs horizontally, falling or at least only slightly rising, the solids contained in the pumped medium are removed even better.
  • the suction nozzle opens into the suction chamber from below vertically or at least rising steeply. In this way it is ensured that such solid parts are retained in front of the suction chamber, the sinking speed of which is greater than the flow rate of the conveying medium due to a particularly high specific weight. With solid parts that have passed the vertically or steeply rising intake manifold, it can be assumed that they will then easily pass the horizontal or only gently rising delivery paths in the piston pump.
  • the non-return valves are designed as diaphragm valves with an uninterrupted circular cross-section, the membrane of which has a stiff bead on the outer circumference which lies against the valve seat, is arched in the direction of pressure and is attached centrally to a fixed holding shaft.
  • Diaphragm valves designed in this way have a particularly large stroke and accordingly release large through-flow cross sections without the valve body needing any supporting webs or support grids constricting the through-flow cross section.
  • the diaphragm which is arched in the direction of pressure in connection with the stiff bead, also makes the diaphragm valve suitable for relatively high pressures.
  • the membrane held in the middle by the holding shaft and connected externally to the rigid bead, which bulges in the direction of pressure in the pressure direction, has the effect that the pressure load on the valve according to the membrane theory, i.e. H. is absorbed by tensile stresses, but not by bending stresses. Since elastic materials can absorb much stronger tensile stresses than bending stresses, it is possible to make the membrane relatively thin, so that it can be easily bent back when the valve is opened and opens a large opening cross-section, and yet can absorb high liquid pressures in the closed position.
  • the diaphragm and the bead of the check valves are expediently made of rubber-elastic material, a steel ring being incorporated into the bead at higher liquid pressures.
  • the bead can have a relatively small cross section with great rigidity, so that only small mass forces occur when the valve is actuated.
  • the built-in steel ring prevents the bead from folding under the influence of the tensile forces of the membrane attacking it at one point on the circumference and in this way making the valve leaky.
  • the check valves are fastened to housing covers of the pump housing, which are detachably connected to the pump housing. Suitable detachable fasteners can be used for the releasable fastening of the housing cover, so that the valves and the inside of the pump are accessible with a few simple steps.
  • the housing covers assigned to the check valves of the pressure chamber are expediently provided with filler pieces which fill the dead corners in the feed channels of the pressure chamber in front of these check valves and form run-up ramps which extend to the level of the lower edge of the valve passage .
  • These filler pieces fill out the dead spaces in which solid particles could accumulate and, in addition, direct the solid parts rolling or sliding on the bottom of the conveying path to the pressure valve so that they can pass through the pressure valve without obstruction.
  • the pump housing in its entirety is designated by reference number 1.
  • a pump cylinder 2 is arranged in the pump housing 1, in the interior of which a double-acting pump piston 3 is arranged so that it can be pushed back and forth.
  • the pump piston 3 is connected to a piston rod 4, which is connected to a pump drive, not shown, for example a driving hydraulic cylinder or a crank drive.
  • a suction chamber 7 and a pressure chamber 8 are connected to the interior of the pump cylinder 2 via narrow connecting channels 5 and 6 and, like the pump cylinder 2, are located next to one another in the horizontal plane in the pump housing 1.
  • connection channel 5 is connected to the part of the interior of the pump cylinder 2 facing the full surface of the pump piston 3, while the connection channel 6 is connected to the part of the interior of the pump cylinder 2 facing the ring surface of the pump piston 3.
  • the connecting channels 5 and 6 there are check valves 9 and 10 assigned to the suction chamber 7, which allow the flow of the medium from the suction chamber 7 into the connecting channels 5 and 6, and a backflow of the medium from the connecting channels 5 and 6 into the suction chamber 7 prevent however.
  • the pressure chamber 8 are assigned check valves 11 and 12, which allow the flow of the medium from the connecting channels 5 and 6 into the pressure chamber 8, but prevent a backflow of the medium from the pressure chamber 8 into the connecting channels 5 and 6, respectively.
  • the check valves 9, 10, 11 and 12 are each located on housing covers 13, 14, 15 and 16, which are detachably connected to the pump housing 1.
  • the connection between the housing covers 13, 14, 15, 16 and the housing 1 takes place in each case by means of screws or by means of suitable quick fasteners.
  • the housing covers 15 and 16 assigned to the pressure chamber 8 are each provided with filler pieces 17 and 18 which fill the dead corners in the connecting channels 5 and 6 to the pressure chamber 8 and form sliding ramps which extend to the level of the lower edges of the valve passage of the check valves 12 or 13 are enough.
  • a vertically opening intake 19 is connected from below.
  • a horizontally opening pressure connection 20 on the side of the pressure chamber 8.
  • a vent valve 21 is provided on the upper side of the pressure chamber 8.
  • the pump cylinder 2, the suction chamber 7, the pressure chamber 8, the connecting channels 5 and 6 as well as all check valves 9, 10, 11, 12 are arranged in the same horizontal plane, so that within the pump housing behind the vertical arranged intake manifold 19 result in substantially horizontal delivery paths, which allow self-cleaning of the pump in the manner described.
  • Fig. 3 the check valve 9 is shown enlarged in detail.
  • this check valve 9 has a curved diaphragm 30 made of rubber-elastic material, which is fastened in the middle to a holding shaft 31.
  • the membrane 30 On the outer circumference, the membrane 30 is provided with a rigid bead 32 made of rubber-elastic material, into which a steel ring 33 serving for stiffening is incorporated.
  • the bead 32 bears against an annular valve seat 34 of the pump housing 1 and, in the open position, lifts off the entire circumference of this valve seat 34.
  • the membrane 30 is arched in the direction of pressure, such that the membrane 30 fixed on the one hand on the bead 32 and on the other hand on the holding shaft 31 is only loaded by tensile stresses under pressure according to the membrane theory.
  • the bead 32 in the event of the reverse action, can easily lift off from the valve seat 34 by bending the membrane 30 and opens up a large passage cross section which is not restricted by any supporting webs or the like.
  • the holding shaft 31 is fastened to the housing cover 13, which in turn is connected to the pump housing 1.
  • the entire check valve 9 can be removed in a simple manner by simply removing the housing cover 13.
  • the check valve 10 is constructed in the same way as the check valve 9.
  • the check valves 11 and 12 are in principle constructed in the same way as the check valve 9 shown in detail in FIG. 3, but because they are assigned to the pressure chamber 8 they have an opposite direction of action. So that these check valves 11 and 12 can also be easily removed, there the valve seats 34 are connected to the housing covers 15 and 16 and are removed together with them, so that the bulge in the pressure chamber 8 cannot hinder the expansion of the check valve.
  • Fig. 1 it is finally indicated that the air bubble forming in the pump housing 1 can only extend to the upper edge of the valve passage of the check valves 11 and 12 assigned to the pressure chamber.
  • the resulting air-filled space in the connecting channels 5 and 6 and in the pump cylinder 2 is so small that it cannot interfere with the proper functioning of the pump.
  • vent valve 21 is arranged in the embodiment of FIGS. 1 to 3 on the top of the pressure chamber 8 , through which excess air volumes are constantly removed.
  • the pressure port designated there by reference numeral 22 extends from the underside of the pressure chamber 8 to the top thereof and is provided in the area of the top with a vent opening 23 opening into the pressure chamber 8. This ventilation opening also ensures that air that has entered the pressure chamber is continuously removed.
  • the pressure port 23 is smaller in cross section or at most as large as the suction port 19, so that due to the developing flow velocities in the pressure port, the solid parts sucked in by the pump and further conveyed through the pump are removed again via the pressure port.

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

Abstract

Pompe à piston pour milieux liquides, notamment pour milieux contaminés par des matières solides. Dans le but d'avoir une pompe de ce type qui soit autonettoyante, on propose de placer la chambre d'aspiration (7), le cylindre de pompe (2) et la chambre de pression (8) l'un à côté de l'autre dans le même plan horizontal ou légèrement incliné, de placer les soupapes de non-retour (9, 10, 11, 12) l'une à côté de l'autre dans le même plan horizontal ou légèrement incliné et de faire déboucher le raccord de refoulement (20) sur la face inférieure de la chambre de pression. De plus, le raccord d'aspiration (19) débouche verticalement ou au moins approximativement verticalement à partir du fond de la chambre d'aspiration. De cette manière on obtient un parcours du liquide dans la pompe essentiellement horizontal ou légèrement montant, de façon que les matières solides qui arrivent dans le carter de la pompe soient à nouveau évacuées de la pompe.

Claims (8)

1. Pompe à piston pour le transport de liquides contenant des matières solides, la pompe comportant un piston de pompage coulissant dans un cylindre de pompage dont l'intérieur est relié, par l'intermédiaire de clapets anti-retour fonctionnant en sens opposé l'un par rapport à l'autre, à un compartiment d'aspiration muni de la tubulure d'aspiration de la pompe à piston et à un compartiment de refoulement muni de la tubulure de refoulement de la pompe à piston,
caractérisée en ce que
le compartiment d'aspiration (7), le cylindre de pompage (2) et le compartiment de refoulement (8) sont disposés l'un à côté de l'autre dans un plan horizontal ou légèrement incliné, les clapets anti-retour (9,10,11,12) sont disposés l'un à côté de l'autre dans ce même plan horizontal ou légèrement incliné, l'ouverture d'entrée de la tubulure de refoulement (20, 22) se trouve dans la partie inférieure du compartiment de refoulement (8).
2. Pompe à piston selon la revendication 1,
caractérisée en ce que
la tubulure de refoulement (22) monte à partir de la face inférieure du compartiment de refoulement (8) jusqu'à la face supérieure dudit compartiment et est munie d'une ouverture de désaération (23) à section réduite débouchant dans le compartiment de refoulement (8).
3. Pompe à piston selon la revendication 1,
caractérisée en ce que
la tubulure de refoulement (20) prend une allure descendante, horizontale ou légèrement ascendante à partir de la face inférieure du compartiment de refoulement (8), la face supérieure du compartiment de refoulement (8) est munie d'un clapet de désaération (21).
4. Pompe à piston selon l'une quelconque des revendications 1 à 3,
caractérisée en ce que
t'ouverture d'entrée de la tubulure d'aspiration (19) se trouve dans la partie inférieure du compartiment d'aspiration (7).
5. Pompe à piston selon l'une quelconque des revendications 1 à 4,
caractérisée en ce que
les clapets anti-retour (9, 10, 11, 12) sont des clapets à membrane avec une libre ouverture de passage circulaire, la membrane (30) est munie d'un talon circonférentiel rigide (32) qui s'appui sur le siège du clapet (34), la membrane a une courbure annulaire en direction de pression et est fixée au centre sur une tige de soutien (31).
6. Pompe à piston selon la revendication 5,
caractérisée en ce que
la membrane (30) et le talon (32) de chacun des clapets anti-retour sont fabriqués de matières mobiles, un anneau en acier (33) est incorporé dans le talon (32).
7. Pompe à piston selon les revendications 5 et 6,
caractérisée en ce que
les clapets anti-retour (9, 10, 11, 12) sont fixés sur des couvercles (13, 14, 15, 16) du carter de la pompe (1) qui peuvent être enlevés du carter de la pompe (1).
8. Pompe à piston selon la revendication 7,
caractérisée en ce que
les couvercles du carter (15, 16) qui portent les clapets anti-retour (11, 12) du compartiment de refoulement (8) sont munis de cales de remplissage (17, 18) qui, en amont de ces clapets anti-retour (11, 12), comblent les espaces nuisibles dans les canalisations (5, 6) de raccordement au compartiment de refoulement (8) et servent de glissières qui s'étendent jusqu'au bord inférieur de l'ouverture de passage des clapets anti-retour (11, 12).
EP84901346A 1983-04-06 1984-04-03 Pompe a piston pour milieux liquides contamines par des matieres solides Expired EP0138927B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84901346T ATE29272T1 (de) 1983-04-06 1984-04-03 Kolbenpumpe fuer flueissige durch feststoffe verunreinigte medien.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3312358 1983-04-06
DE3312358 1983-04-06
DE19843410943 DE3410943A1 (de) 1983-04-06 1984-03-24 Kolbenpumpe fuer fluessige medien, insbesondere fuer durch feststoffe verunreinigte medien
DE3410943 1984-03-24

Publications (2)

Publication Number Publication Date
EP0138927A1 EP0138927A1 (fr) 1985-05-02
EP0138927B1 true EP0138927B1 (fr) 1987-09-02

Family

ID=25809745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84901346A Expired EP0138927B1 (fr) 1983-04-06 1984-04-03 Pompe a piston pour milieux liquides contamines par des matieres solides

Country Status (6)

Country Link
US (1) US4664606A (fr)
EP (1) EP0138927B1 (fr)
AU (1) AU2810784A (fr)
DE (2) DE3410943A1 (fr)
IT (1) IT1175827B (fr)
WO (1) WO1984003913A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3610884A1 (de) * 1986-04-02 1987-10-08 Korthaus Ernst Ventilmembran
GB2214991A (en) * 1988-02-11 1989-09-13 Pneumatec Limited Improved double-acting pump
EP0955462A1 (fr) * 1998-04-08 1999-11-10 Juan Rafael Muela Garcia Dispositif pour le transvasement du marc de l'huile
DE10211137A1 (de) * 2002-03-07 2003-10-02 Msa Auer Gmbh Rückschlagventil

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US597368A (en) * 1898-01-11 Ington
US188450A (en) * 1877-03-13 Improvement in pumps
US180701A (en) * 1876-08-08 Improvement in steam-pumps
US340020A (en) * 1886-04-13 Double-acting force-pump
FR569199A (fr) * 1924-04-08
US683542A (en) * 1900-04-04 1901-10-01 Charles C Worthington Pump.
GB191107590A (en) * 1911-03-27 1912-03-27 Callenders Cable & Const Co Improvements in and relating to Reciprocating Pumps.
US1445035A (en) * 1920-10-04 1923-02-13 Dayton Pump & Mfg Company Pump
US1877873A (en) * 1931-01-09 1932-09-20 Richard J Holmgreen Diaphragm pump
GB566936A (en) * 1943-07-15 1945-01-19 Justin Hurst Improvements in or relating to pumps for gritty, dirty and corrosive liquids
US2491230A (en) * 1946-04-11 1949-12-13 Elmer E Theis Pump
US2609756A (en) * 1946-11-22 1952-09-09 Worthington Corp Reciprocating pump
US2646000A (en) * 1949-03-24 1953-07-21 Benjamin F Schmidt Diaphragm pump and system
US2895424A (en) * 1955-09-13 1959-07-21 Stewart Warner Corp Constant pressure liquid pump
FR1157126A (fr) * 1956-08-02 1958-05-27 Ets A Guiot Valves de pompes à combustible pour moteurs à combustion interne
US3077204A (en) * 1957-12-05 1963-02-12 Thomsen Supply Inc Elastic ball check valve
US3298319A (en) * 1964-10-26 1967-01-17 Donald W Barlow Pumping system for slurry and other solutions
DE2103530A1 (de) * 1971-01-26 1972-08-17 Meynadier & Cie AG, Zürich (Schweiz) Steuerventile für Beton- und Mörtelpumpen insbesondere zur Förderung von Spritzbeton
US3684406A (en) * 1971-03-10 1972-08-15 David V Edwards Diaphragm
US4252510A (en) * 1978-08-28 1981-02-24 Bruce A. Bromley Diaphragm pump

Non-Patent Citations (1)

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Title
CARL RITTER: FLÜSSIGKEITSPUMPEN, Dr.Max JÄNECKE VERLAG, 1945, Seite 131 *

Also Published As

Publication number Publication date
DE3465761D1 (en) 1987-10-08
DE3410943A1 (de) 1984-10-18
US4664606A (en) 1987-05-12
IT1175827B (it) 1987-07-15
WO1984003913A1 (fr) 1984-10-11
EP0138927A1 (fr) 1985-05-02
IT8420404A0 (it) 1984-04-05
AU2810784A (en) 1984-10-25

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