EP0332100B1 - Entlüftungsvorrichtung für eine Flüssigkeitspumpe - Google Patents

Entlüftungsvorrichtung für eine Flüssigkeitspumpe Download PDF

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Publication number
EP0332100B1
EP0332100B1 EP89103877A EP89103877A EP0332100B1 EP 0332100 B1 EP0332100 B1 EP 0332100B1 EP 89103877 A EP89103877 A EP 89103877A EP 89103877 A EP89103877 A EP 89103877A EP 0332100 B1 EP0332100 B1 EP 0332100B1
Authority
EP
European Patent Office
Prior art keywords
throttle
venting device
bore
screw element
pump head
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
EP89103877A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0332100A3 (en
EP0332100A2 (de
Inventor
Michael Wally
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.)
Prominent Dosiertechnik GmbH
Original Assignee
Prominent Dosiertechnik GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6349328&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0332100(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Prominent Dosiertechnik GmbH filed Critical Prominent Dosiertechnik GmbH
Priority to AT89103877T priority Critical patent/ATE80441T1/de
Publication of EP0332100A2 publication Critical patent/EP0332100A2/de
Publication of EP0332100A3 publication Critical patent/EP0332100A3/de
Application granted granted Critical
Publication of EP0332100B1 publication Critical patent/EP0332100B1/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 invention relates to a ventilation device for a liquid pump working with a pressure and suction stroke, in particular a diaphragm metering pump, the pump chamber of which is limited by a pump head housing that accommodates suction and pressure valves, a ventilation channel extending from an upper space of the pump chamber to an outlet opening and in parallel connection has a switching valve for quick ventilation and an adjustable throttle for permanent ventilation and wherein the switching valve has a valve seat and a closure piece formed on a first screw element and the throttle has a throttle seat and a throttle element formed on a second screw element.
  • a venting device for a diaphragm metering pump is known (DE-U 82 02 361), which has only one valve.
  • the valve closure piece of the valve is screwed into a threaded bore of a sleeve having the valve seat, which in turn is screwed in a statically sealed manner into a threaded bore in the pump head housing which is connected to the pump chamber.
  • the sleeve and the pump head housing do not form a valve, since the pump head housing has no valve seat.
  • the valve closure piece in the sleeve the valve can either be opened only slightly with a throttling function for permanent ventilation or wide open for quick ventilation. After the rough adjustment for quick ventilation, another fine adjustment for permanent ventilation must be made. This is time consuming and labor intensive.
  • the invention has for its object to provide a ventilation device of the type described above, which takes up less space and can be manufactured cheaper.
  • This object is achieved in that the switching valve is arranged in the pump head housing and the throttle in the first screw element.
  • valve seat is formed in the pump head housing and the first screw element is screwed into a threaded bore of the pump head housing and that the second screw element is screwed into a longitudinal bore of the first screw element in which the throttle seat is formed near the end on the closure side.
  • first screw element prefferably surrounded by an annular space following the closure piece and for the longitudinal bore to be connected to the annular space, preferably via at least one radial bore. Since the throttle seat is arranged concentrically to the valve seat, this results in the desired parallel connection with the simplest of means.
  • a threaded bore extends from the free end face of the pump head housing and ends with a bore section extending beyond the valve seat in a housing bore receiving the pressure valve. This results in simple machining of the pump head housing.
  • a transverse bore in the pump head housing leading to the outlet opening preferably adjoins the circumference of the threaded bore. This transverse bore can also be produced without difficulty when machining the pump head housing.
  • the cross hole can lead to an outlet opening located below the threaded hole.
  • the liquid discharged with the gas can then drain into a collecting container.
  • transverse bore leads to an outlet opening located on the top of the pump head housing. Gas then exits immediately upwards. Clogging due to stagnant liquid that crystallizes, for example, is not possible.
  • valve seat can be conical and the closure piece can have an O-ring arranged in a circumferential groove. This results in a tight seal with simple manufacture.
  • valve seat surface need only deviate from the cross-sectional plane to such an extent that the O-ring can rest against it.
  • the cone angle should be greater than 100 °. A relatively small rotation of the first screw element is therefore sufficient to expose a sufficient valve cross section for the quick ventilation.
  • the throttle seat is conical and the throttle element has the same conicity.
  • a cone gap results which can be set very precisely in order to determine the desired throttle resistance.
  • the smallest possible cone angles are recommended, preferably those of less than 60 °. This leads to a particularly good fine adjustment.
  • a cylindrical pin can be connected to the conical throttle element, which extends through the central opening of the throttle seat in order to remove crystalline deposits.
  • Fig. 1 shows the end part of a liquid pump 1.
  • a membrane 5 is clamped, which is moved back and forth via a piston rod, not shown, which is connected to a connection 6. It is driven, for example, by an electromagnet.
  • a pump chamber 7 is formed between the pump head housing 3 and the membrane 5. When the membrane is actuated, the volume of this pump chamber 7 increases and decreases.
  • a suction valve insert 9 provided with a suction line connection 8 and having two individual suction valves 10 and 11 is screwed into the housing 3 from below.
  • a pressure valve insert 13 provided with a pressure line connection 12 and having two pressure valves 14 and 15 connected in series is screwed into the housing 3 from above.
  • the switching valve 17 is formed by a conical valve seat 19 with a cone angle of 120 ° and a closure piece 20 which is attached to the end face of a screw element 21.
  • the closure piece 20 has an O-ring inserted into a circumferential groove.
  • the screw element 21 is screwed into a threaded bore 22 of the housing 3 and sealed with the help of an O-ring 23.
  • the threaded bore 22 opens with a section 24 in a housing bore 25, which serves to receive the pressure valve insert 13, at a location between the first pressure valve 14 and the second pressure valve 15.
  • an annular space 27 is provided between the thread 26 of the screw element 21 and the closure piece 20 is outside of the screw element 21. This is connected via the end section 28 of a transverse bore 29 to an outlet opening 30.
  • a nozzle 31 is inserted into this outlet opening, via which liquid or gas can be discharged.
  • a longitudinal bore 32 is provided in the screw element 21, into which a second screw element 33 is screwed and sealed by means of an O-ring 34.
  • a conical throttle seat 35 interacts with a conical throttle element 36 of the same conicity, so that a conical throttle gap can be set between the two.
  • the cone angle is 30 °.
  • a cylindrical pin 37 axially adjoining the conical throttle element 36 projects through the central opening of the throttle seat 35 in order to remove crystalline deposits from the central opening.
  • Radial bores 38 connect the longitudinal bore 32 to the annular space 27. The switching valve 17 and throttle 18 are therefore connected in parallel.
  • the screw element 21 is screwed on by half or a full turn. This results in a sufficiently large switching valve cross section to quickly remove air or gas from the pump chamber 7.
  • the throttle 18 can be closed, as shown in FIG. 1.
  • the position according to FIG. 2 applies to permanent ventilation.
  • the switching valve 17 is closed and the throttle 18 is opened so far by turning the screw element 33 that gas can escape, but liquid cannot escape or cannot escape to any appreciable extent. It is advantageous here that when the switching valve 17 is repeatedly opened and closed by turning the screw element 33, the same throttle setting for the permanent ventilation can always be maintained.
  • FIGS. 1 and 2 essentially the same parts as in FIGS. 1 and 2 are used. The only difference is that the annular space 27 in the pump head housing 103 is connected via a transverse channel 129 arranged at the top to an outlet opening 130 at the top, into which a connecting piece 131 is inserted.
  • the screw element 21 can be inserted into the housing 3 in such a way that the annular space 27 is connected to the pump chamber 7 and the bore 24 leads to the outlet opening.
  • the threads of the two screw elements can be different; for example, the screw element 21 has a coarser thread and the screw element 33 has a finer thread.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Reciprocating Pumps (AREA)
EP89103877A 1988-03-10 1989-03-06 Entlüftungsvorrichtung für eine Flüssigkeitspumpe Expired - Lifetime EP0332100B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89103877T ATE80441T1 (de) 1988-03-10 1989-03-06 Entlueftungsvorrichtung fuer eine fluessigkeitspumpe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3807877A DE3807877C1 (enrdf_load_stackoverflow) 1988-03-10 1988-03-10
DE3807877 1988-03-10

Publications (3)

Publication Number Publication Date
EP0332100A2 EP0332100A2 (de) 1989-09-13
EP0332100A3 EP0332100A3 (en) 1990-06-27
EP0332100B1 true EP0332100B1 (de) 1992-09-09

Family

ID=6349328

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89103877A Expired - Lifetime EP0332100B1 (de) 1988-03-10 1989-03-06 Entlüftungsvorrichtung für eine Flüssigkeitspumpe

Country Status (4)

Country Link
EP (1) EP0332100B1 (enrdf_load_stackoverflow)
AT (1) ATE80441T1 (enrdf_load_stackoverflow)
DE (2) DE3807877C1 (enrdf_load_stackoverflow)
ES (1) ES2034439T3 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1025793C2 (nl) * 2004-03-23 2005-09-26 Bba Pompen B V Ontluchtingsinrichting voor een plunjerpomp.
CN101713398B (zh) * 2009-11-23 2011-10-26 杭州大潮石化设备有限公司 用于往复泵的泵头组合阀

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE520426C (de) * 1931-03-11 Franz Gruenauer Schnueffelventil fuer Plungerpumpen zur Belueftung von Saug- und Druckwindkessel
US731893A (en) * 1902-12-18 1903-06-23 Jas Lawlor Double-acting pump.
FR1487289A (fr) * 1966-07-22 1967-06-30 Texsteam Corp Pompe volumétrique
DE2803470B2 (de) * 1978-01-27 1980-06-04 Dulger, Viktor, 6900 Heidelberg Entlüftungsvorrichtung fur eine Flussigkeitskolbenpumpe, insbesondere Dosierpumpe
DE8202361U1 (de) * 1982-01-30 1982-06-24 Chemie Und Filter Gmbh Verfahrenstechnik Kg, 6900 Heidelberg Entlueftungsvorrichtung fuer eine fluessigkeitskolbenpumpe, insbesondere dosierpumpe

Also Published As

Publication number Publication date
EP0332100A3 (en) 1990-06-27
EP0332100A2 (de) 1989-09-13
DE58902223D1 (de) 1992-10-15
DE3807877C1 (enrdf_load_stackoverflow) 1989-09-21
ES2034439T3 (es) 1993-04-01
ATE80441T1 (de) 1992-09-15

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