WO1996034202A1 - Pompe a double effet - Google Patents

Pompe a double effet Download PDF

Info

Publication number
WO1996034202A1
WO1996034202A1 PCT/SE1996/000519 SE9600519W WO9634202A1 WO 1996034202 A1 WO1996034202 A1 WO 1996034202A1 SE 9600519 W SE9600519 W SE 9600519W WO 9634202 A1 WO9634202 A1 WO 9634202A1
Authority
WO
WIPO (PCT)
Prior art keywords
working
chamber
medium
chambers
outlet
Prior art date
Application number
PCT/SE1996/000519
Other languages
English (en)
Inventor
Svante Bahrton
Original Assignee
Svante Bahrton
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 SE9501564A external-priority patent/SE9501564L/
Priority claimed from SE9600630A external-priority patent/SE9600630L/xx
Application filed by Svante Bahrton filed Critical Svante Bahrton
Publication of WO1996034202A1 publication Critical patent/WO1996034202A1/fr

Links

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
    • 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
    • F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
    • F04B43/0736—Pumps having fluid drive the actuating fluid being controlled by at least one valve with two or more pumping chambers 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/129—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers
    • F04B9/131—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members
    • F04B9/135—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by two single-acting elastic-fluid motors, each acting in one direction

Definitions

  • the present invention relates to a double-acting pump of the kind which includes two cavities, each of which is divided into an operating chamber and a working chamber by means of a respective movable partition wall in the form of a piston or diaphragm, wherein each of the operating and working chambers is provided with a valve-controlled inlet and outlet for a gaseous driving and operating medium and for a pump- transported liquid working medium respectively, wherein the working chambers are located closest to one another and the operating chambers are located outwardly of an associated partition wall, and wherein a device for transmitting movement of one partition wall to the other, and vice versa, extends between the movable partition walls.
  • Double-acting pumps of this kind are known to the art from European Patent Specifications 0 132 913 and 0 181 756, for instance.
  • the operating medium is normally air and the working medium one of the liquids that are pumped through pipes primarily in the food industry, the chemical process industry and the pharmaceutical industry.
  • One drawback with known double-acting pumps is that the liquid working medium is delivered to and discharged from the working chambers through a relatively complicated conduit and valve arrange ⁇ ment which in addition to requiring a relatively large amount of space also generates pressure losses.
  • An object of the present invention is to provide a novel and advantageous double-acting pump with which the aforesaid drawback is at least substantially eliminated.
  • each of the working chambers is connected to a common working medium inlet chamber located between said chambers, through the medium of a flap valve mounted in a respective working chamber wall and opening in response to underpressure in an associated working chamber, and connectable through the medium of a respective outlet opening provided in a respec ⁇ tive working chamber wall to a common working medium outlet chamber located between said working chambers, wherein the outlet openings can be closed by a valve flap that reacts to underpressure, when an underpressure prevails in the working chamber associated with said openings.
  • This arrangement provides advantageously a pump which requires comparatively little space and which has low pressure losses and thus incurs low operating costs and is lean in specific driving medium consumption.
  • Fig. 1 is a sectional view of an inventive double-acting pump
  • Figs. 2 illustrates an alternative embodiment of the flap valve arrangement.
  • the double-acting pump illustrated in Fig. 1 is a so-called diaphragm pump having a generally cylindrical pump housing 1 which includes cavities or hollows defined by end walls 2 and inner walls 3. Each cavity in turn is divided into a working chamber 5 and an operating chamber 6 by means of respective partition walls or diaphragm units 4, wherein the working chambers 5 are located close together and the operating chambers 6 are located outwardly of associated diaphragm units 4.
  • the working chambers 5 are provided with valve-controlled inlets and outlets for pump-transported liquid working medium.
  • these inlets and outlets have the form of openings 7, 8 in the inner walls 3 of the working chambers, and pressure-con ⁇ trolled flap valves 9 which coact with said openings.
  • flap valves and the novel positioning of the valve- controlled inlets and outlets directly in adjacent chamber walls 3 results in minimum deflection of the pumped working medium as it passes through the pump, and in minimum pressure losses, therewith making this valve arrangement highly favourable.
  • the working medium arrives at the pump in the direction shown by an arrow, through a pipe or conduit 10 which opens into a space 11 located between the walls 3, and exits into a diametrically opposed space 12, also located between the walls 3, and leaves the pump through an outlet pipe 13, as indicated by an upper arrow.
  • Each of the diaphragm units 4 is comprised of a round, relatively rigid central part 14 and a peripheral part 15 which is made of a relatively soft, pliable material and which is connected to the pump housing 1 at its radially outer edge.
  • the diaphragm units 4 are mutually connected by means of a device 16 which transmits the movements of one diaphragm unit 4 to the other, and vice versa.
  • This device 16 is generally rod-shaped and is journalled for movement in the direction of its longitudinal axis in a bearing 17 mounted centrally in the pump housing 1.
  • the movement transmitting device 16 is resilient in its movement transmit ⁇ ting direction, as will be explained in more detail below.
  • the operating chambers 6 are provided at 18 with openings which function as driving medium inlets and outlets and which are connected to a pressurized driving-medium supply net 20 through the medium of a bistable two-position four-way valve 19.
  • the valve 19 is moved to one or the other of its two positions by two mono-stable two-position two-way valves 21 which receive re-setting pulses from manoeuvering pins 23 on the diaphragm units 4 against the action of the return springs 22, as said diaphragm units reach their respective outer limit or turning positions.
  • the movement transmis ⁇ sion device 16 journalled in the bearing 17 is comprised of two mutually telescopic parts 24, 25, each of which is connected to or is in abutment with its respective diaphragm unit 4 and which coact with a pressure spring 26 acting between said units and having the form of a coil spring in the illustrated case.
  • the left diaphragm-unit 4 is located just short of its turning point at the end of its suction movement.
  • the liquid working medium is sucked from the space 11 through the inlet 7 with the check valve 9 open, and into the left working chamber 5 whose check valve 9 in the outlet 8 is held closed by the pressure exerted by the liquid portion that is forced from the right working chamber 5 into the space 12 by the right diaphragm unit 4, said right diaphragm unit 4 being located near to the end of its pressure stroke.
  • the right operating chamber 6 is connected to the driving medium supply net via the valve 19, and the left operating chamber 6 is evacuated via the same valve.
  • the operating pin 23 on the left diaphragm unit actuates an associated control valve 21, such as to switch the valve to its unstable position while compressing the valve return spring 22, wherewith the valve allows driving medium to flow through and reset the valve 19 to its other, stable position.
  • the pressure in the left operating chamber 6 will therewith rise almost immediately, said chamber having a small volume in this functional stage.
  • the pressure in the right operating chamber 6 does not fall as quickly and the movement transmission device 16 would prevent movement of the left diaphragm unit 4 until the pressure in the right operating chamber had fallen if said device were not compressible.
  • the left diaphragm unit 4 is movable independently of the right diaphragm unit during compression of the spring 26 and forced expulsion of working medium from the left working chamber 5.
  • the spring 26 will expand during continued movement of the diaphragm units 4 and the movement transmission device 16.
  • the spring 26 therewith greatly reduces pulsation of the working medium flow on the pressure side of the pump and also the consumption of driving medium, since essentially no pressure energy is consumed in assisting in pressing the driving medium from the right operating chamber 6.
  • Fig. 2 illustrates an advantageous alternative embodiment of the inventive flap valve arrangement.
  • the chamber walls 3 are essentially conical, such their radially inner parts meet at the bearing 17.
  • the openings 7 through which working medium is introduced into an associated chamber 5 are each fitted with a flap valve 9.
  • the openings 8, on the other hand, have a common valve flap 9 which can be swung between positions in which it closes one or the other of said openings 8 according to the pressure differences prevailing in respective chambers 5 and 12.
  • the arrangement illustrated in Figure 2 further simplifies the construction of the pump and provides a pump in which pressure losses are relatively small in operation.

Landscapes

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

Abstract

Une pompe à double effet comporte deux cavités, chacune d'elles étant divisée en une chambre de commande (6) et une chambre de travail (5) grâce à une paroi de séparation amovible (4). Les chambres de travail sont placées tout près les unes des autres, et chacune d'elle est pourvue d'une admission et d'une évacuation (7, 9; 8, 9) commandées par un clapet, permettant au milieu de travail liquide acheminé par la pompe de s'écouler. Un dispositif (16) transmettant un mouvement d'un paroi de séparation à l'autre s'étend entre les parois de séparation amovibles (4). Chacune des chambres de travail (5) est raccordée à une chambre d'admission commune (11) du milieu de travail, cette chambre commune étant située entre les chambres (5), par l'intermédiaire d'une soupape à clapet (7, 9), montée dans une paroi (3) de la chambre de travail respective, et s'ouvrant en réponse à une dépression dans une chambre de travail associée, et pouvant être raccordée, par un orifice (8) d'évacuation respectif ménagé dans une paroi (3) de la chambre de travail respective, à une chambre d'évacuation commune (12) du milieu de travail, située entre les chambres (5). Les orifices (8) d'évacuation peuvent être fermés par un clapet (9) de soupape qui réagit à la dépression lorsqu'une dépression règne dans la chambre de travail associée à ces orifices (8).
PCT/SE1996/000519 1995-04-27 1996-04-19 Pompe a double effet WO1996034202A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE9501564-0 1995-04-27
SE9501564A SE9501564L (sv) 1995-04-27 1995-04-27 Dubbelverkande pump
SE9600630A SE9600630L (sv) 1996-02-20 1996-02-20 Dubbelverkande pump
SE9600630-9 1996-02-20

Publications (1)

Publication Number Publication Date
WO1996034202A1 true WO1996034202A1 (fr) 1996-10-31

Family

ID=26662285

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1996/000519 WO1996034202A1 (fr) 1995-04-27 1996-04-19 Pompe a double effet

Country Status (1)

Country Link
WO (1) WO1996034202A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2357811A (en) * 1999-12-30 2001-07-04 Flotronic Pumps Ltd Double-diaphragm pump
US6419463B1 (en) * 1997-11-13 2002-07-16 Svante Bahrton Reversing valve for a diaphragm pump
RU2480622C2 (ru) * 2009-02-10 2013-04-27 Анатолий Сергеевич Поляков Поршневой насос высокого давления
RU2482330C2 (ru) * 2009-02-10 2013-05-20 Анатолий Сергеевич Поляков Поршневой насос

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0132913A1 (fr) * 1983-04-07 1985-02-13 Flotronics Ag Pompe à membrane ou à piston
DE3909800C2 (fr) * 1989-03-24 1992-10-22 Neuhaeuser Gmbh + Co, 4670 Luenen, De

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0132913A1 (fr) * 1983-04-07 1985-02-13 Flotronics Ag Pompe à membrane ou à piston
DE3909800C2 (fr) * 1989-03-24 1992-10-22 Neuhaeuser Gmbh + Co, 4670 Luenen, De

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6419463B1 (en) * 1997-11-13 2002-07-16 Svante Bahrton Reversing valve for a diaphragm pump
GB2357811A (en) * 1999-12-30 2001-07-04 Flotronic Pumps Ltd Double-diaphragm pump
EP1113174A3 (fr) * 1999-12-30 2002-01-02 Flotronic Pumps Limited Pompe à membrane double
RU2480622C2 (ru) * 2009-02-10 2013-04-27 Анатолий Сергеевич Поляков Поршневой насос высокого давления
RU2482330C2 (ru) * 2009-02-10 2013-05-20 Анатолий Сергеевич Поляков Поршневой насос

Similar Documents

Publication Publication Date Title
EP0823023B1 (fr) Pompe a double effet
US4830586A (en) Double acting diaphragm pump
CA1088809A (fr) Pompe actionnee par fluide
EP0304210B1 (fr) Pompe à double membrane
US5527160A (en) Mechanical shift, pneumatic assist pilot valve
CA2033181A1 (fr) Micropompe a deux soupapes dotee de sortie amelioree
EP0711918A3 (fr) Compresseur de réfugérant à capacité variable
WO1996034202A1 (fr) Pompe a double effet
CA2217978C (fr) Compresseur de gaz haute pression
WO1996025598A1 (fr) Pompe pneumatique
AU740929B2 (en) A valve arrangement
EP1112449A1 (fr) Pompe a double action
CN109519352B (zh) 柱塞泵和工程机械
US3151804A (en) Vacuum operated pump
JP2660228B2 (ja) エアハイドロ出力圧制御ポンプ
US5244364A (en) Pumping unit
JPS608485A (ja) 容積ポンプ
US3630646A (en) Hydraulic pump
RU2037651C1 (ru) Мембранный пневмоприводной насос
SU1579483A1 (ru) Гидроавтоматический водовыпуск
JP2591498Y2 (ja) 圧力流体駆動式ポンプ
JPS6339429Y2 (fr)
RU2064090C1 (ru) Пневмоприводной диафрагменный насос
RU2086807C1 (ru) Пневмоприводной диафрагменный насос
GB2120733A (en) Valve system for pumps

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: CA

122 Ep: pct application non-entry in european phase