EP0477043B1 - Selbstansaugende Flüssigkeitspumpe mit Ventilen - Google Patents

Selbstansaugende Flüssigkeitspumpe mit Ventilen Download PDF

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Publication number
EP0477043B1
EP0477043B1 EP19910402146 EP91402146A EP0477043B1 EP 0477043 B1 EP0477043 B1 EP 0477043B1 EP 19910402146 EP19910402146 EP 19910402146 EP 91402146 A EP91402146 A EP 91402146A EP 0477043 B1 EP0477043 B1 EP 0477043B1
Authority
EP
European Patent Office
Prior art keywords
valve
washer
main valve
spring
boss
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
Application number
EP19910402146
Other languages
English (en)
French (fr)
Other versions
EP0477043A1 (de
Inventor
Louis Claude Porel
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.)
Hydro Rene Leduc SA
Original Assignee
Hydro Rene Leduc 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
Application filed by Hydro Rene Leduc SA filed Critical Hydro Rene Leduc SA
Publication of EP0477043A1 publication Critical patent/EP0477043A1/de
Application granted granted Critical
Publication of EP0477043B1 publication Critical patent/EP0477043B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04B53/06—Venting

Definitions

  • the present invention relates to the problem of self-priming of piston pumps with delivery valves counter-held by return springs.
  • each discharge valve in two superposed stages by arranging a main valve, closing the discharge opening and counter-held by a spring with a high load. , said main valve being itself traversed by a central bore and this central bore in turn being closed by a second valve held against by a spring with lower setting. It has been found in use that, in particular in barrel pumps where the pump body carrying the cylinders and the pistons (and called barrel) rotates, the bias plate being fixed in rotation, the secondary valve moves laterally and no longer wears properly in its seat, while the springs interfere with each other. The Applicant has abandoned this manufacture and the corresponding patent.
  • the present invention relates to a discharge valve for hydraulic piston pump of the type comprising a main valve, closing the pump discharge conduit and counter-held by a spring with high load, and an auxiliary valve, intended to allow evacuation air during the priming phase, characterized in that said auxiliary valve is constituted by a washer, centered on a boss formed on the body of the main valve, said washer being placed on a plurality of small holes provided in crown through the body of the main valve.
  • the present invention may also include the following provisions: the stroke of the auxiliary valve is very short and limited to approximately one millimeter; this limitation can be obtained by abutment against the spring of the main valve.
  • the piston 1 slides in a bore 2 made in a pump body 3.
  • the reciprocating movement is printed on the piston 1 by a bias plate 4, against which the piston 1 is supported by the '' through a stud 5, which slides on the surface of the bias plate 4.
  • the stud 5 passes astride a light 6, through which the hydraulic fluid arrives.
  • the piston 1 is hollow so that the liquid passes through it and is discharged through the pipe 7.
  • the pipe 7 is closed by a valve 8, which is counter-held by a spring 9, the calibration of which is strong enough to obtain a rapid and frank closing of the valve 8.
  • the spring 9 is held by a plug 10, which has a skirt 11, which serves as a guide for the valve 8.
  • the spring 9 is fitted on a cylindrical boss 8a of the valve 8
  • the valve 8 has another boss 8b with a diameter slightly larger than that of the boss 8a on which a washer 12 is centered. This washer 12 rests on a series of holes 13, drilled through the valve 8.
  • the washer which is free, in the sense that it is not counter-held by a spring, lifts and lets the air discharged into the holes 13; then, when the air has been completely evacuated, the hydraulic fluid arrives through the pipe 7 and lifts the valve 8, the holes 13 no longer playing any role.
  • FIG 3 illustrates an alternative embodiment in which the same elements have the same references.
  • the only difference with the valve of Figure 1 is that the valve is no longer guided by the skirt 11 of the plug 10, but is more simply centered on the orifice of the pipe 7 by a peripheral bevel.
  • the stroke of the washer 12 is small; that is to say either practically equal to or slightly greater than the diameter of the holes 13. In the examples shown, this stroke is of the order of a millimeter.
  • the spring 9 of the main valve is used to serve as a stop against which the washer comes to bear. It suffices to give the boss 8a a height equal to the thickness of the washer plus the desired stroke and to give it a diameter slightly greater than that of the boss 8a, but less than the outside diameter of the spring 9, so that the latter protrudes slightly beyond the boss 8b, while resting on it.

Landscapes

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

Claims (4)

  1. Druckventil für eine hydraulische Kolbenpumpe der Art mit einem Hauptventil, das die Förderleitung der Pumpe verschließt und von einer Feder mit starker Kraft vorgespannt ist, und mit einem Hilfsventil, das zur Ableitung der Luft während der Ansaugphase vorgesehen ist, dadurch gekennzeichnet, daß das Hilfsventil von einer Scheibe (12) gebildet wird, die auf dem Hauptventil (8) über einen an diesem ausgebildeten Vorsprung (8a) angeordnet ist und gegen eine Vielzahl kleiner Bohrungen (13) anlegbar ist, die in kranzförmiger Anordnung durch den Körper das Hauptventiles (8) hindurch verlaufen.
  2. Ventil nach Anspruch 1, bei dem der Verschiebeweg der Scheibe (12) frei ist, d.h. daß sie bei ihrem Sitz auf dem Führungsvorsprung nicht von einer Rückstellkraft beaufschlagt wird.
  3. Ventil nach Anspruch 1 oder 2, bei dem die Bewegung der Scheibe gering, d.h. im wesentlichen gleich oder nur wenig größer als der Durchmesser der Bohrungen (13), ist.
  4. Ventil nach einem der vorhergehenden Ansprüche, bei dem der Verschiebeweg der Scheibe durch die Feder (9) des Hauptventils, welche gegen die Scheibe anliegt, begrenzt ist.
EP19910402146 1990-09-21 1991-07-31 Selbstansaugende Flüssigkeitspumpe mit Ventilen Expired - Lifetime EP0477043B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9011660A FR2667117B1 (fr) 1990-09-21 1990-09-21 Pompe hydraulique a clapets de refoulement auto-amorcante.
FR9011660 1990-09-21

Publications (2)

Publication Number Publication Date
EP0477043A1 EP0477043A1 (de) 1992-03-25
EP0477043B1 true EP0477043B1 (de) 1994-03-02

Family

ID=9400514

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910402146 Expired - Lifetime EP0477043B1 (de) 1990-09-21 1991-07-31 Selbstansaugende Flüssigkeitspumpe mit Ventilen

Country Status (3)

Country Link
EP (1) EP0477043B1 (de)
DE (1) DE69101294T2 (de)
FR (1) FR2667117B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6139286A (en) * 1998-09-28 2000-10-31 Pulsafeeder, Inc. Automatic venting back pressure valve

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1301956B (de) * 1966-04-02 1969-08-28 Eberspaecher J Brennstoff-Kolbenpumpe
DK143719C (da) * 1979-01-03 1982-03-08 Radiometer As Fremgangsmaade til udluftning af en vaeskedoserende stempelpumpe og stempelpumpe med et arrangement til brug ved udoevelse affremgangsmaaden
FR2449210A1 (fr) * 1979-02-14 1980-09-12 Leduc & Fils Rene Soupape a deux etages

Also Published As

Publication number Publication date
FR2667117B1 (fr) 1993-07-02
DE69101294D1 (de) 1994-04-07
DE69101294T2 (de) 1994-10-06
EP0477043A1 (de) 1992-03-25
FR2667117A1 (fr) 1992-03-27

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