US3238891A - Pump apparatus - Google Patents

Pump apparatus Download PDF

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Publication number
US3238891A
US3238891A US314305A US31430563A US3238891A US 3238891 A US3238891 A US 3238891A US 314305 A US314305 A US 314305A US 31430563 A US31430563 A US 31430563A US 3238891 A US3238891 A US 3238891A
Authority
US
United States
Prior art keywords
pump
piston
suction
suction valve
valve
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
US314305A
Other languages
English (en)
Inventor
Thier Bernd
Ott Herbert
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.)
Huels AG
Lewa Herbert Ott GmbH and Co KG
Original Assignee
Lewa Herbert Ott GmbH and Co KG
Chemische Werke Huels AG
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 Lewa Herbert Ott GmbH and Co KG, Chemische Werke Huels AG filed Critical Lewa Herbert Ott GmbH and Co KG
Application granted granted Critical
Publication of US3238891A publication Critical patent/US3238891A/en
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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0068—General arrangements, e.g. flowsheets
    • 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
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
    • F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/08—Actuation of distribution members
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing
    • F04B49/243—Bypassing by keeping open the inlet valve

Definitions

  • a process has been found which makes it possible to deliver and evacuate pumpable liquid media 'which are under reduced pressure and/ or have the tendency to gasify during the intake suction by means of vibrating positive displacement pumps by evacuating the pump area of delivery during the suction stroke, at least intermittingly.
  • This process can be accomplished in practice in a simple manner, namely by turning the standard pump head assembly with freely operating valves by 180 so that the suction valves appears on top.
  • the evacuation of the area of delivery takes place through the feed line for the medium so that it will flow from the top to the bottom while the gas bubbles will rise up in the feed line from the area of delivery.
  • the suction valve is operated in a manner known per se: either hydraulically, mechanically, pneumatically or electrically.
  • the positive control offers the advantage that the suction valve will be locked by mechanical forces or by shape and that its capacity can be adjusted in accordance with the rhythm of flow of the pump system so that a precisely defined delivery can be attained.
  • the suction valve can remain open throughout the entire duration of the suction stroke but it will be advantageous in many instances to reduce the rate of opening of the suction valve. By means of such adjustment optimum efii ciency can be obtained for diverse speeds, especially for the purpose of avoiding the occurrence of a counter flow.
  • the devices in question are particularly suitable for metering purposes.
  • FIGURE 1 depicts a continuous vacuum distillation column where the sump product is drawn off by means of a pump
  • FIGURE 2 shows the details of a pump.
  • the mixture to be separated is introduced at the filler n ck 13 and enters the separation column 1.
  • the substance with a lower boiling point will flow in the form of Vapor to the dephlegmatizer 3 and condense.
  • One portion of the fluid will flow back into the column by way of the return pipe 4 while the distillate so obtained will flow through pipe 5 and the cooler 6 into the receiver 7.
  • the product with a higher boiling point will travel through the separating column 1 downward into the sump receiver 2; a certain level is maintained within this receiver.
  • the product flows from there through the cooler 8 into the positive displacement pump 9 which delivers the fluid through the pressure line 10 to the vented container 11.
  • the evacuation of the apparatus up to the containers 1 and 11 is accomplished by the vacuum pump 12.
  • the positive displacement pump 9 shown is a piston pump but can be designed also as a diaphragm or bellows metering pump. It has a suction valve 14 which is controlled positively by hydraulic means and is turned lin contrast to standard pump head arrangementsand thereby place on top of the pump. At the upper part of the positively controlled suction valve 14 a venting nozzle is arranged, with the vacuum-compensating line connected thereto.
  • the suction valve 14 When the piston of the positive displacement pump performs its suction stroke, the suction valve 14 is pushed open, for example by a hydraulic system, so that a direct connection is established to the apparatus by way of the vacuum-compensating line 15. Therefore, the delivery area of the pump is evacuated in conformity with the magnitude of the pressure within the sump receiver with the result that a genuine inflow pressure exists, created by the height of the column of liquid, so that the product can flow into the pump area through the cooler 8.
  • a device which comprises a positive displacement pump 9 with a suction valve 14 where said suction valve is controlled hydraulically through a camshaft 28, a recuperator piston 30 and a control piston 22 and is provided with a fitting 21 for the connection to the vacuum system.
  • FIGURE 2 depicts such oleo-hydraulic mechanism for the control of the suction valve.
  • a recuperator piston 30 is moved by an eccentric shaft 28 so that the oil pressure influences the control piston 22 over line 35.
  • the control piston 22 which is sealed against the suction valve 14 by a folded bellows depresses, with its pushrod, the suction valve ball 18.
  • the pump chamber 17 is evacuated through the fitting 21 which is connected with the compensating line 15 whereby the fluid flows into the pump area 17 through the intake 19 and the piston 23 returns to its rear dead center.
  • the bore 31 is cleared by the control edge of the spindle sleeve with the result that due to this edge control the oil pressure collapses suddenly and the suction valve 14 closes rapidly due to the spring force acting upon the valve ball 18.
  • the height level of the controlling edge can be adjusted by a lock nut 24 and the spindle sleeve 25 which runs within the cylinder 29 so that the closing action of the suction valve 14 can be timed accurately. In this manner the suction valve 14 can be closed before the piston 23 reaches its rear dead center position. This arrangement serves to avoid losses due to counter flow toward the vacuum suction side and it becomes possible to accomplish a delivery which is almost free of losses.
  • multiple impulse-producing elements can be arranged at a central drive shaft which influence the diverse pump heads and can be adjusted independently.
  • the positively controlled suction valve being precisely adjustable as to its time and duration of operation prevents a counter flow of the product toward the suction side and ensures, due to its method of operation: locked by mechanical forces or by shape, the metering of products which are extremely diflicult to process, for example highly viscous media which by their friction develop great flow resistances, or suspensions containing a great amount of solids and coarse-grained suspended solid particles, or
  • the positively controlled suction valve will ensure satisfactory venting and starting operation.
  • the enewly developed apparatus is particularly advantageous for the venting and the delivery of gas-containing media such as synthetic plastic pastes. Due to the mechanical stresses of the medium caused by the piston movement and the interconnected generation of a low pressure during the suction cycle a complete and efficient de-gasification of the medium will be accomplished. The separated gases can be drawn off also at the suction valve.
  • Apparatus for transferring a liquid having a tendency to vaporize under the intake suction of a reciprocating fluid displacement pump from an evacuated container into a storage tank which is normally under atmospheric pressure comprising, in combination with said container and said storage tank a pump casing disposed below the level of liquid in said container, a horizontal bore in said pump casing, a fluid displacing element in said bore, a head closing an end of said bore, an inlet port in the upper end of said head, a discharge port in the lower end of said head, a normally closed non-return valve in the lower end of said head controlling said discharge port, a conduit connecting said discharge port with said storage tank, a normally spring closed valve in the upper end of said head controlling said inlet port, a conduit connecting said inlet port with the lower end of said container, means for cooling said last named conduit, a push rod positioned to engage and open said inlet valve, an open space in said head above said inlet port and its control valve, a bellows surrounding said push rod and communciating with said open

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Reciprocating Pumps (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
US314305A 1963-03-12 1963-10-07 Pump apparatus Expired - Lifetime US3238891A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC0029355 1963-03-12

Publications (1)

Publication Number Publication Date
US3238891A true US3238891A (en) 1966-03-08

Family

ID=7018943

Family Applications (1)

Application Number Title Priority Date Filing Date
US314305A Expired - Lifetime US3238891A (en) 1963-03-12 1963-10-07 Pump apparatus

Country Status (5)

Country Link
US (1) US3238891A (de)
AT (1) AT244155B (de)
CH (1) CH413600A (de)
DE (1) DE1453465A1 (de)
GB (1) GB980378A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3369928A (en) * 1966-05-05 1968-02-20 Hooker Chemical Corp Method and apparatus for use with metal treating solutions
US5431546A (en) * 1993-08-23 1995-07-11 Liquid Carbonic Corporation Apparatus for intermittent transfer of fluid having vapor trap seal and vapor escape means
WO2010072340A1 (de) * 2008-12-15 2010-07-01 Grundfos Management A/S Verfahren und vorrichtung zur entgasung des förderraums einer dosierpumpe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0509185B1 (de) * 1991-04-19 1995-11-08 Ente per le nuove tecnologie, l'energia e l'ambiente (ENEA) Einführvorrichtung einer Kolbenpumpe für Saturationsflüssigkeiten

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2018144A (en) * 1933-04-29 1935-10-22 Linde Air Prod Co Method and apparatus for transferring gas material
US2083021A (en) * 1934-01-02 1937-06-08 Carl F High Fuel feeding system
US2246515A (en) * 1936-08-01 1941-06-24 Masch Und Metallwaren Handels Compressor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2018144A (en) * 1933-04-29 1935-10-22 Linde Air Prod Co Method and apparatus for transferring gas material
US2083021A (en) * 1934-01-02 1937-06-08 Carl F High Fuel feeding system
US2246515A (en) * 1936-08-01 1941-06-24 Masch Und Metallwaren Handels Compressor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3369928A (en) * 1966-05-05 1968-02-20 Hooker Chemical Corp Method and apparatus for use with metal treating solutions
US5431546A (en) * 1993-08-23 1995-07-11 Liquid Carbonic Corporation Apparatus for intermittent transfer of fluid having vapor trap seal and vapor escape means
US5522709A (en) * 1993-08-23 1996-06-04 Liquid Carbonic Corporation Apparatus for intermittent transfer of fluid having vapor trap seal and vapor escape means
WO2010072340A1 (de) * 2008-12-15 2010-07-01 Grundfos Management A/S Verfahren und vorrichtung zur entgasung des förderraums einer dosierpumpe
US8540799B2 (en) 2008-12-15 2013-09-24 Grundfos Management A/S Method and device for degassing the transport chamber of a metering pump

Also Published As

Publication number Publication date
CH413600A (de) 1966-05-15
DE1453465A1 (de) 1969-02-06
AT244155B (de) 1965-12-27
GB980378A (en) 1965-01-13

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