US3779384A - Pressure-regulated diaphragm pump - Google Patents

Pressure-regulated diaphragm pump Download PDF

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Publication number
US3779384A
US3779384A US00218175A US3779384DA US3779384A US 3779384 A US3779384 A US 3779384A US 00218175 A US00218175 A US 00218175A US 3779384D A US3779384D A US 3779384DA US 3779384 A US3779384 A US 3779384A
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United States
Prior art keywords
pump
liquid
pressure
primary side
diaphragm
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Expired - Lifetime
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US00218175A
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English (en)
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F Stahlkopf
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Individual
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Individual
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Publication of US3779384A publication Critical patent/US3779384A/en
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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
    • F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston

Definitions

  • the invention relates to a piston-operated diaphragm pump for pumping liquids containing solids in suspension, and to means for'regulating the delivery rate and pressure of the pump in dependence on the pressure of the solids-containing liquid on the secondary or delivery side of the pump.
  • Piston diaphragm pumps are commonly used for solids-containing liquid such as dirty water, particularly if the liquid has to be conveyed against a high pressure, such as is developed on the inlet side of a filter press.
  • a high pressure such as is developed on the inlet side of a filter press.
  • the regulation of the delivery of a piston diaphragm pump is preferably carried out from the clean liquid side i.e., the primary side of the pump.
  • the pressure of the liquid, e.g. clean water, on the primary side is kept within required limits by for example, a relief pressure valve, so that as the pressure on the secondary side rises, the relief pressure valve on the primary side comes into operation and prevents a further rise in pressure in the pump.
  • a relief pressure valve so that as the pressure on the secondary side rises, the relief pressure valve on the primary side comes into operation and prevents a further rise in pressure in the pump.
  • This process of pressure regulation on the primary side using a relief pressure valve has the disadvantage that the water flowing through the valve becomes hot and evaporates. Further another disadvantage of this primary regulation is that the energy from the moving piston has to be destroyed in the relief pressure valve, so that the power requirement at the lowest output of the pump is just as high as when the pump is operating under full load.
  • the present invention provides a means for regulating the pressure and the delivery rate of the pump without the development of heat as a result of the liquid flowing through a valve and so that the power requirement of the pump becomes correspondingly smaller as the output of the pump falls.
  • the diaphragm-controlled valve is able to pass clean liquid into the primary side only via this regulating valve.
  • This regulating valve is pressure-controlled in such a way that at elevated pressure in the dirty liquid pressure tank it throttles or closes the feed to the diaphragm-controlled valve so that the clean liquid side no longer receives a supply of liquid.
  • the liquid in the clean liquid side is discharged through a throttle valve with each stroke so that as the supply of clean liquid is reduced the convey-ing dis:
  • phragm is acted upon less and less by the piston; the stroke is reduced, and when a predetermined pressure in the compressed air tank is reached it comes to a standstill so that the pumping ceases.
  • the throttle valve is always present on the clean water side because as a rule somewhat more liquid is sucked up on the clean water side than is necessary. This excess flows away through the throttle valve.
  • a safety valve is also fitted on the clean water side. If, therefore, the mechanical plant on the secondary side should fail, the primary side is safeguarded by a safety valve of known design, so that no excess pressure can occur on the secondary side.
  • the dirty liquid side can be protected by a standard valve; in this process an additional safety valve may be provided on the clean liquid side.
  • This additional safety valve on the clean liquid side is natually dimensioned according to the pressure transmitted from the primary to the secondary side.
  • the conveying diaphragm l is located in a known manner between the dirty water or secondary side 2 of the pump chamber and the clean water or primary side 3 of the pump chamber.
  • a cylinder 4 is located in the primary side 3, and this cylinder contains the reciprocating piston S with its piston rod 6.
  • the dirty water to be conveyed enters at A into the suction valve housing 7 through the non-return ball 8, so as to enter the pressure valve housing 9 in a known manner at B.
  • the dirty water enters the compressed air tank 11, and leaves through the pressure pipe 112 at C. In the compressed air tank the dirty water maintains a water level 13.
  • a regulating valve 14 is mounted on the compressed air tank, and includes a regulating seat 17. From this valve regulating seat 17 there extends a suction pipe 18 which leads to a non-return valve 19 having a non-return ball 20. The valve 19 communicates with a diaphragm-controlled valve 22 via a pipe 21.
  • This diaphragm-controlled valve 22 operates in such a way that the conveying diaphragm l in its suction position 1a opens the valve; this is done by means of a lever 23 pivoted at 24 and connected at 25 to a valve ball 26 which co-operates with a seat 27.
  • a lever 23 pivoted at 24 and connected at 25 to a valve ball 26 which co-operates with a seat 27.
  • the valve When the valve is open clean water can pass through the pipe 28 in a known manner into the clean water side 3 of the pump.
  • the piston 5 advances in the cylinder 4
  • the diaphragm is moved into position lb.
  • the excess water sucked up through the pipe 21 and the suction pipe 18 flows through the pipe 29 via a throttle valve 30 having a non-return ball 31 and a pressure spring 32,
  • a suction pipe'l8a leads into the regulating valve 14.
  • the control diaphragm 16 is acted upon and closes the control seat 17 so that the suction pipe 18 receives less water; the clean water in the primary side 3 is reduced as at each stroke of the piston water escapes via the pipe 29 into the clean water container 34.
  • the desired pressure in the compressed air tank 11 can be determined by means of the control spring 16.
  • a safety device is provided on the clean water side.
  • This comprises a safety valve 35 with a non-retum ball 36 and a regulating spring 37.
  • This safety valve 35 is connected by a pressure pipe 38 with the clean water side 3 of the pump.
  • the safety valve 35 would come into operation and would feed back the excess pressure via the pipe 39 advantageously into the clean water container 34.
  • the invention has the important advantage that with the compressed air tank 11 a pressure plate may be dispensed with.
  • a piston-operated diaphragm pump for pumping a liquid containing solids in suspension comprising a pump body defining a pump chamber, a diaphragm dividing the chamber into a primary side and a secondary side, a piston in the chamber on the primary side operable to reciprocate the diaphragm by hydraulic pressure on clean liquid in the primary side, an inlet and an outlet in the secondary side, through which the solidscontaining liquid is induced to flow by reciprocation of the diaphragm, a closed tank having an inlet for receiving the solids-containing liquid from the pump, an outlet in the tank for said liquid, and means for varying the quantity of clean liquid in the primary side of the pump chamber in dependence on the pressure in said tank.
  • a pump according to claim 4 wherein the primary side of the pump is provided with a pressure safety device comprising a second outlet in the primary side which communicates with said clean liquid container through a spring-biassed non-retum valve.
  • a pump according to claim 2, wherein the regulating valve comprises a diaphragm in a wall of the tank operable above a predetermined air pressure in the tank to throttle the flow of fluid in said circuit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US00218175A 1971-01-21 1972-01-17 Pressure-regulated diaphragm pump Expired - Lifetime US3779384A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2102762A DE2102762C3 (de) 1971-01-21 1971-01-21 Einrichtung zur Regelung von Druck und Fördermenge einer hydraulisch betätigten Membranpumpe

Publications (1)

Publication Number Publication Date
US3779384A true US3779384A (en) 1973-12-18

Family

ID=5796532

Family Applications (1)

Application Number Title Priority Date Filing Date
US00218175A Expired - Lifetime US3779384A (en) 1971-01-21 1972-01-17 Pressure-regulated diaphragm pump

Country Status (9)

Country Link
US (1) US3779384A (fr)
JP (1) JPS5143202B1 (fr)
BE (1) BE778287A (fr)
CA (1) CA967057A (fr)
DE (1) DE2102762C3 (fr)
FR (1) FR2124801A5 (fr)
GB (1) GB1368689A (fr)
LU (1) LU64642A1 (fr)
NL (1) NL7200882A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032445A (en) * 1975-11-10 1977-06-28 Varian Associates Liquid chromatography pumping system with compensation means for liquid compressibility
US4217212A (en) * 1978-06-19 1980-08-12 Deal Troy M Method of pumping and processing phosphate slime for land reclamation
WO1982004265A1 (fr) * 1981-05-26 1982-12-09 Sugar Co Amalgamated Procede de sorption et de separation de constituants dissous
US5163820A (en) * 1987-11-16 1992-11-17 Karldom Corporation Airless sprayer with adjustable pressure unloading valve
US5186615A (en) * 1990-06-26 1993-02-16 Karldom Corporation Diaphragm pump
US6126403A (en) * 1997-09-18 2000-10-03 Yamada T.S. Co., Ltd. Diaphragm pump
US20080056916A1 (en) * 2006-09-04 2008-03-06 Brangmbh, A Germany Company Pump device
US20220235753A1 (en) * 2019-10-18 2022-07-28 Healtell (Guangzhou) Medical Technology Co., Ltd. Microfluidic chip pumps and methods thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2843054C2 (de) * 1978-10-03 1983-07-14 Bran & Lübbe GmbH, 2000 Norderstedt Kolbenmembranpumpe
JPH01114442A (ja) * 1987-10-28 1989-05-08 Tokyo Kikai Seisakusho Ltd インキ供給装置
DE19826610A1 (de) * 1998-06-16 1999-12-23 Bran & Luebbe Membranpumpe und Vorrichtung zur Steuerung derselben

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430097A (en) * 1942-06-25 1947-11-04 Briggs Filtration Company Lubricating system
US3101058A (en) * 1961-06-16 1963-08-20 Jr William H Carr Diaphragm pumping system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2430097A (en) * 1942-06-25 1947-11-04 Briggs Filtration Company Lubricating system
US3101058A (en) * 1961-06-16 1963-08-20 Jr William H Carr Diaphragm pumping system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032445A (en) * 1975-11-10 1977-06-28 Varian Associates Liquid chromatography pumping system with compensation means for liquid compressibility
US4217212A (en) * 1978-06-19 1980-08-12 Deal Troy M Method of pumping and processing phosphate slime for land reclamation
WO1982004265A1 (fr) * 1981-05-26 1982-12-09 Sugar Co Amalgamated Procede de sorption et de separation de constituants dissous
US4412866A (en) * 1981-05-26 1983-11-01 The Amalgamated Sugar Company Method and apparatus for the sorption and separation of dissolved constituents
US5163820A (en) * 1987-11-16 1992-11-17 Karldom Corporation Airless sprayer with adjustable pressure unloading valve
US5186615A (en) * 1990-06-26 1993-02-16 Karldom Corporation Diaphragm pump
US6126403A (en) * 1997-09-18 2000-10-03 Yamada T.S. Co., Ltd. Diaphragm pump
US20080056916A1 (en) * 2006-09-04 2008-03-06 Brangmbh, A Germany Company Pump device
US8360750B2 (en) * 2006-09-04 2013-01-29 Bran+Luebbe Gmbh Pump device
US20220235753A1 (en) * 2019-10-18 2022-07-28 Healtell (Guangzhou) Medical Technology Co., Ltd. Microfluidic chip pumps and methods thereof
US11976646B2 (en) * 2019-10-18 2024-05-07 Healtell (Guangzhou) Medical Technology Co., Ltd Microfluidic chip pumps and methods thereof

Also Published As

Publication number Publication date
CA967057A (en) 1975-05-06
GB1368689A (en) 1974-10-02
JPS5143202B1 (fr) 1976-11-20
DE2102762B2 (de) 1978-01-26
DE2102762C3 (de) 1978-09-14
NL7200882A (fr) 1972-07-25
DE2102762A1 (de) 1972-08-03
FR2124801A5 (fr) 1972-09-22
BE778287A (fr) 1972-07-20
LU64642A1 (fr) 1972-06-26

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