EP0386610A1 - Pompe à débit constant - Google Patents

Pompe à débit constant Download PDF

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Publication number
EP0386610A1
EP0386610A1 EP90103929A EP90103929A EP0386610A1 EP 0386610 A1 EP0386610 A1 EP 0386610A1 EP 90103929 A EP90103929 A EP 90103929A EP 90103929 A EP90103929 A EP 90103929A EP 0386610 A1 EP0386610 A1 EP 0386610A1
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EP
European Patent Office
Prior art keywords
pump
housing
housings
outlet
liquid
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.)
Withdrawn
Application number
EP90103929A
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German (de)
English (en)
Inventor
John Russell Schneider
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0386610A1 publication Critical patent/EP0386610A1/fr
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • This application is a divisional application of parent application Serial No. 07/320,227, filed on March 7, 1989.
  • This invention relates to pumping systems and more particularly to a volumetric pump that will always pump at a preselected constant output rate of liquid or slurry regardless of the amount of head pressure it must pump against.
  • Another object of the invention is to provide a volumetric or metering pump that can continuously pump a predetermined constant amount of particulate material in slurry form without being damaged or excessively worn internally by the slurry and without any internal pump slippage.
  • a volumetric pump which will provide a constant output despite the resistance head which it has to pump against.
  • the pump comprises a pair of pump housings each having a piston or a flexible diaphragm situated within its housing.
  • the two pistons or diaphragms are connected by a rigid shaft or link supported by a bearing means between the housings.
  • the two pump housings have an inlet conduit and an outlet conduit.
  • the inlet conduit is connected to a liquid or slurry supply vessel at one end and to one of each of a pair of check valves at its other end.
  • the outlet conduit is connected at one end to another pair of check valves and to a using receiver of fluid or slurry (e.g. a filter or elevated tank) at its other end.
  • each pair of check valves is connected together by an intermediate conduit and each intermediate conduit is connected to one housing on one side of the internal diaphragm.
  • the two pump housings are also connected to an air pressure source through a control valve which is connected and controlled by a timer or programmable controller.
  • the air pressure source can be regulated to move the diaphragms within both housings first in one direction and then in another direction.
  • a charge of liquid or slurry is drawn into one pump housing and is ejected from the other pump housing.
  • the action is reversed for the two pump housings upon movement of the shaft and its connected diagrams in the opposite direction.
  • the volumetric pump according to the invention enables a predetermined amount of filter aid to be supplied to a plate type filter despite the level of pressure buildup due to dirt within the filter chambers.
  • the precise amount of filter aid dispensed by the volumetric pump per unit time can be preselected and maintained continuously during each filter run or cycle.
  • the steady output volume of my pump is so accurate and remains so constant that this pump can be referred to as a zero slip, constant-output, volumetric positive displacement pump.
  • Fig. 1 is a diagrammatic layout of a typical filtering system 10 which utilizes a volumetric pump 12 embodying principles of the present invention.
  • the oil or liquid to be filtered is pumped from a holding tank 11 by a positive displacement pump 13 through a valve 14 in an inlet line 16 to a filter 18 which as shown, may be of the horizontal plate type.
  • a filter as described in my U.S. Patent No.
  • the filter plates 20 are arranged in a vertical stack and when pressed together they form a receiving chamber between each pair of plates for the liquid to be filtered and a collecting chamber on the opposite side of each plate for the clean, filtered liquid.
  • the collecting chambers are connected in parallel to an outlet manifold 22 that is connected through a valve 24 to a clean liquid tank 25.
  • a layer of filter media e.g. paper
  • a so-called "body feed” of particulate filtering material such as diatomaceous earth must be supplied to the flow of liquid filtrate in the inlet line 16.
  • the body feed material must be supplied at a constant rate despite back pressure buildup within the filter, so that the filter cake builds up evenly on the filter media. In the present invention, this body feed flow is controlled with precision by the volumetric pump 12.
  • the present invention may be applied for use with other types of filters, such as tube filters or screen filters which use a body feed or filter aid to build an internal cake
  • the plate type filter 18 is shown for purposes of illustration.
  • the volumetric pump 12 may also be used for other applications where a preselected constant output quantity for each stroke must be maintained during pump operation.
  • the pump 12 has an inlet line 26 connected through a valve 28 to a body feed tank 30 that contains a supply of body feed material in slurry form.
  • An outlet conduit 32 from the pump 12 is connected directly to the inlet line 16 to the filter.
  • the pump 12 operates, as described below, to dispense, at a constant flow rate, a desired or predetermined amount of body feed to the filter 18 despite any pressure variations that occur within the filter due to a buildup of dirt therein during a typical filter cycle.
  • the volumetric pump 12 comprises a pair of housings 34 and 36 each having the same size and shape and mounted on a suitable frame support base 38.
  • Each housing is generally circular and formed by a pair of convex wall members that are connected together at their adjoining circular edges.
  • movable members such as flexible diaphragms 40 and 42, respectively.
  • These diaphragms are connected together at their centers by a straight, rigid link 44 so that the diaphragms move together from side to side, and are always in the same relative positions within their respective housings.
  • the link 44 is supported within a bearing housing 45 that interconnects and supports the pump housings 34 and 36.
  • the inlet feed line 26 from the body feed slurry supply tank 30 is connected to a "tee" connection 46 that furnishes body feed slurry equally through a pair of pipes 48, 49 to a pair of inlet ball check valves 50 and 52.
  • the valve 50 is connected by a fluid line 54 to an outlet ball check valve 56
  • the valve 52 is connected by a fluid line 58 to an outlet ball check valve 60.
  • the outlet check valves 56 and 60 are connected by outlet lines 61, 62 to the main outlet conduit 32 which supplies body feed slurry to the filter 18.
  • a first air line 66 is connected to the pump housing 34 on one air-only side of its diaphragm 40, and a second air line 68 is connected to the other pump housing 36 at the air-only side of its diaphragm.
  • These air lines 66 and 68 are connected to two outlet ports "1" and "2" respectively of a 4-way solenoid valve 70.
  • This valve is supplied with plant air from a suitable source (not shown) at a constant pressure that is always well above that of the filter back pressure (e.g. 80 psi) through a standard air filter-regulator 72, a lubricator 74 and a needle valve 76 in a conduit 77.
  • the four-way solenoid valve 70 has outlet ports "1" and “2", an inlet port "3" connected to the air pressure supply conduit and an exhaust port "x".
  • a two-position rotor that is moved by a solenoid. In one position, the cylinder provides a passage between the inlet port and outlet port "1" while outlet port "2" is connected to the exhaust port. In this position, air flows in line 66 to pump housing 34 to force its diaphragm to eject slurry through conduit 61, and simultaneously air flows from pump housing 36 through line 68 to port "2" and through the internal valve cylinder to the exhaust port of the valve.
  • the solenoid valve 70 may be actuated back and forth between its first and second positions in a preselected manner or rate by a simple single pole timer 78 which is of the type which is commercially available.
  • This timer has an on-off switch 80 connected by a lead 81 to a suitable power source so that its time of operation can be set to any preselected time period.
  • the body feed slurry from the supply tank 30 flows through line 26 through the open check valves 50 and 52 and into one side of each of the pump housings 34 and 36 as shown in Fig. 2.
  • the timer 78 controls the solenoid valve 70 so that fluid or air pressure for driving the pump is supplied first to one pump housing and then to the other pump housing.
  • the pressure of the driving fluid is always considerable higher than the head pressure which the pump must work against.
  • air pressure at a level of around 100 psi is adequate for operating the pump on a constant output basis.
  • each housing on one side of the diaphragm therein As pressurized air enters each housing on one side of the diaphragm therein, the latter is forced from one side of the housing to the other side. Since the diaphragms 40 and 42 for the two housings are connected by link 44, both diaphragms move together. One diaphragm always moves against a portion of the housing chamber which contains the charge of slurry that was supplied from the slurry supply tank 30 on the previous stroke. Now, as the diaphragm moves against the housing chamber containing slurry, the slurry is forced out of the pump through a ball check valve 56 or 60 and through the common outlet line 32 to the main inlet feed conduit 16 to the filter 18.
  • a charge of slurry is drawn into the other pump housing from the supply tank and is ready to be expelled during the reverse movement of the diaphragm on the next cycle.
  • the air pressure supplied to the pump is always sufficient to complete a pump stroke in one direction within the time period set for the timer.
  • a pump 12A may be provided wherein, in lieu of the diaphragms 40 and 42 of pump 12, the movable members are provided in the form of rigid piston heads 40A and 42A connected by a link 44A.
  • the piston heads are movable within a cylindrical housing 84 having an internal barrier 86 which forms a pair of chambers 34A and 36A.
  • the pump 12A has an inlet line 26A from a liquid supply to a first pair of check valves 50A and 52A connected to the chambers 34A and 36A on one side of the piston heads.
  • a second pair of chech valves 56A and 60A from the air source 71 are connected to pump chambers but on the other side of the piston heads.
  • Air lines from the pump housing are connected to the parts designated "1" and "2" on a 4-way solenoid valve 70 which is the same as used with the diaphragm version of the pump 12.
  • the solenoid valve 70 is controlled in its operation by a timer 78 and the mode of operation is the same as for the diaphragm pump 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP90103929A 1989-03-07 1990-03-01 Pompe à débit constant Withdrawn EP0386610A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US320227 1981-11-12
US32022789A 1989-03-07 1989-03-07
US43486989A 1989-11-13 1989-11-13
US434869 1989-11-13

Publications (1)

Publication Number Publication Date
EP0386610A1 true EP0386610A1 (fr) 1990-09-12

Family

ID=26982374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90103929A Withdrawn EP0386610A1 (fr) 1989-03-07 1990-03-01 Pompe à débit constant

Country Status (3)

Country Link
EP (1) EP0386610A1 (fr)
JP (1) JPH02291481A (fr)
CA (1) CA2011441A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9400947A (nl) * 1994-06-10 1996-01-02 Wijk Engineering B V Van Dubbelwerkende membraanpomp.
EP0781922A1 (fr) * 1995-12-28 1997-07-02 Van Wijk Engineering B.V. Pompe à membrane à double effet
EP1874429A2 (fr) * 2005-04-04 2008-01-09 Ross Perry Filtration et recyclage d'eau pour equipement de fabrication de pierre, y compris la pierre externe et architecturale, selon une capacite de volume accrue
CN102878065A (zh) * 2012-10-26 2013-01-16 上海边锋泵业制造有限公司 具有内置电磁阀的气动隔膜泵
CN103967734A (zh) * 2014-05-26 2014-08-06 成都科佑达技术开发有限公司 一种气动计量泵
CN107781128A (zh) * 2016-08-30 2018-03-09 上海昊芯自动化科技有限公司 一种空气动力溶液输送计量装置
CN111188618A (zh) * 2020-01-17 2020-05-22 江苏科技大学 一种深海采矿提升泵
CN114856954A (zh) * 2022-07-07 2022-08-05 中建环能科技股份有限公司 活塞泵及具有该活塞泵的废水处理装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008184902A (ja) * 2007-01-26 2008-08-14 Gijutsu Kaihatsu Sogo Kenkyusho:Kk ポンプ装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2542392A1 (de) * 1975-09-23 1977-03-31 Wilhelm Fleissner Hochdruckmembranpumpe
US4068641A (en) * 1976-03-03 1978-01-17 Johnson Dennis L Metered fuel injection apparatus
FR2394694A1 (fr) * 1977-06-14 1979-01-12 Draegerwerk Ag Pompe a membrane double, actionnee par un gaz comprime
US4135496A (en) * 1976-01-30 1979-01-23 Institut Kardiologii Imeni A.L. Myasnikova Akademii Meditsinskikh Nauk Sssr Extracorporeal circulation apparatus
DE3326268A1 (de) * 1983-07-21 1985-01-31 Heinz Dipl.-Ing. 3501 Zierenberg Borsdorf Elementierter motorkompressor mit rotationsventil zur pneumatischen kolbensteuerung insbesondere fuer waermepumpen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2542392A1 (de) * 1975-09-23 1977-03-31 Wilhelm Fleissner Hochdruckmembranpumpe
US4135496A (en) * 1976-01-30 1979-01-23 Institut Kardiologii Imeni A.L. Myasnikova Akademii Meditsinskikh Nauk Sssr Extracorporeal circulation apparatus
US4068641A (en) * 1976-03-03 1978-01-17 Johnson Dennis L Metered fuel injection apparatus
FR2394694A1 (fr) * 1977-06-14 1979-01-12 Draegerwerk Ag Pompe a membrane double, actionnee par un gaz comprime
DE3326268A1 (de) * 1983-07-21 1985-01-31 Heinz Dipl.-Ing. 3501 Zierenberg Borsdorf Elementierter motorkompressor mit rotationsventil zur pneumatischen kolbensteuerung insbesondere fuer waermepumpen

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9400947A (nl) * 1994-06-10 1996-01-02 Wijk Engineering B V Van Dubbelwerkende membraanpomp.
EP0781922A1 (fr) * 1995-12-28 1997-07-02 Van Wijk Engineering B.V. Pompe à membrane à double effet
EP1874429A2 (fr) * 2005-04-04 2008-01-09 Ross Perry Filtration et recyclage d'eau pour equipement de fabrication de pierre, y compris la pierre externe et architecturale, selon une capacite de volume accrue
EP1874429A4 (fr) * 2005-04-04 2010-11-03 Stone Industry Recycling Inc Filtration et recyclage d'eau pour equipement de fabrication de pierre, y compris la pierre externe et architecturale, selon une capacite de volume accrue
CN102878065A (zh) * 2012-10-26 2013-01-16 上海边锋泵业制造有限公司 具有内置电磁阀的气动隔膜泵
CN102878065B (zh) * 2012-10-26 2015-06-10 上海边锋泵业制造有限公司 具有内置电磁阀的气动隔膜泵
CN103967734A (zh) * 2014-05-26 2014-08-06 成都科佑达技术开发有限公司 一种气动计量泵
CN107781128A (zh) * 2016-08-30 2018-03-09 上海昊芯自动化科技有限公司 一种空气动力溶液输送计量装置
CN111188618A (zh) * 2020-01-17 2020-05-22 江苏科技大学 一种深海采矿提升泵
CN114856954A (zh) * 2022-07-07 2022-08-05 中建环能科技股份有限公司 活塞泵及具有该活塞泵的废水处理装置
CN114856954B (zh) * 2022-07-07 2022-11-04 中建环能科技股份有限公司 活塞泵及具有该活塞泵的废水处理装置

Also Published As

Publication number Publication date
JPH02291481A (ja) 1990-12-03
CA2011441A1 (fr) 1990-09-07

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