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US3918849A - Piston pump for viscous materials - Google Patents

Piston pump for viscous materials Download PDF

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Publication number
US3918849A
US3918849A US459114A US45911474A US3918849A US 3918849 A US3918849 A US 3918849A US 459114 A US459114 A US 459114A US 45911474 A US45911474 A US 45911474A US 3918849 A US3918849 A US 3918849A
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US
United States
Prior art keywords
cylinder
piston pump
pump
cylinders
piston
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
US459114A
Other languages
English (en)
Inventor
Rudi Schurenberg
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.)
Torkret GmbH
Original Assignee
Torkret 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
Application filed by Torkret GmbH filed Critical Torkret GmbH
Application granted granted Critical
Publication of US3918849A publication Critical patent/US3918849A/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
    • 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
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/02—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having two cylinders
    • 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
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • F04B15/023—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous supply of fluid to the pump by gravity through a hopper, e.g. without intake valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/90—Slurry pumps, e.g. concrete

Definitions

  • the present invention relates to a piston pump for the displacement of viscous fluids, especiallyslurries such as concrete and, more particularly, to a hydraulically driven piston pump in which the displacement medium or liquid is a fluid whose viscosity increases with lowering temperature or freezes.
  • Piston pumps for the displacement of concrete, or other highly viscous materials, such as slurries have been provided heretofore with at least one cylinder communicating at an end with a source of the slurry and with a discharge duct via a valve arrangement, a piston reciprocable in this cylinder and urged through the latter by a power medium or displacement fluid, especially water or oil.
  • Another object of the invention is to provide a piston pump, especially for the displacement of the concrete and like slurries, which can be used without environmental pollution at low temperatures and is effective whether mounted upon a vehicle or at a fixed location.
  • Still another object of the invention is to improve the low-temperature operability of a slurry-displacement pump at relatively low cost.
  • a concrete or slurry pump of the piston type which comprises a pump cylinder connectible at one end with a source of the slurry to be displaced and with an outlet therefor and provided with a piston, means for supplying a hydraulic displacement medium susceptible to change in viscosity upon temperature reduction, e.g., water, to the other end of the cylinder, the last-mentioned means including a plurality of passages traversed by the water, duct means establishing a bypass or branch passage for the water parallel to one of the main passages, and electric heating means in the branch passage.
  • a hydraulic displacement medium susceptible to change in viscosity upon temperature reduction e.g., water
  • a typical branch passage may be established across the inlet and outlet sides of the pump according to the present invention that can be provided with one or more electric heating elements.
  • a branch passage may be established across a portion of the length of the cylinder to which the hydraulic displacement medium is supplied and can be provided with one or more electric heating elements according to the present invention.
  • these heating elements can be operated by line voltage or from the normal currentdistribution network or mains while, when the pump is mounted upon a truck or like vehicle, the heating elements can be operated from a special generator driven by the engine of the vehicle.
  • the heating elements When required, the heating elements are turned on and a portion of the water flows through the respective branch over the heating elements and is thereby strongly heated and returned to the main water circulation so that the temperature of the hydraulic medium is increased and freezing is prevented. Circulating pumps to maintain the hydraulic medium in motion are thus no longer necessary.
  • the branches according to the invention can be relatively small, i.e., of small cross section, and they occupy little usable space so that the overall size of the pump assembly is not affected.
  • FIG. 1 is a diagrammatic perspective view of a piston pump arrangement embodying the present invention
  • FIG. 2 is a detail cross-section of one of the heating devices of the pump of FIG. 1;
  • FIG. 3 is a view similar to FIG. 2 of the other device.
  • FIG. 4 is a diagram of the valve at the end of the cylinders of the piston pump assembly of FIG. 1.
  • the illustrated piston pump for the displacement of concrete is generally of the type described in Gennan published application No. 2,106,713.
  • a piston pump for the displacement of concrete or like slurry materials which comprises a pair of parallel and spacedly juxtaposed displacement cylinders l, 2 lying in a common horizontal plane and mounted on a truck body or positioned fixedly at a construction site.
  • the two cylinders l, 2 are connected to a distributing valve arrangement 4 for selective communication with a hopper or trough 3 receiving the concrete from a mixing station, and with an outlet 5 through which the concrete is conveyed to the site at which it is to be used.
  • the valve 4, shown in simplified form in FIG. 4, may comprise a slide 40 with openings 4b and 4g communicating with the interior of the trough 3 and can carry the outlet 5 or may have an opening permanently eommunicating therewith.
  • the cylinder 1 opens at la into the valve 4 while the cylinder 2 opens at 2a into the latter.
  • the valve member 4a is provided with a pair of passages 4c and 4d corrununicating with the outlet 5 and respective passages 4e and 4f communicating with the inlets 4b and 43. With the valve member 4a in the posiheating tion illustrated. Concrete is admitted through inlet 4g and passage 4f to the cylinder 2 while concrete is displaced from the cylinder 1 via passage 4c to the outlet 5. When the valve member 4a is shifted in the direction A. concrete is permitted to flow from the trough 3 through the inlet 4b into cylinder 1 while concrete is displaced from the cylinder 2 via the passage 4d to the outlet 5.
  • the pistons within the cylinders l, 2 have not been illustrated but are connected by a cable 6a of a link ar rangement represented generally at 6 and consisting of a housing enclosing the cables and their associated pulleys.
  • the cable 60 passes over a pair of idler pulleys 6b at the opposite end of each cylinder 1, 2, along stretches which run parallel to and above the respective cylinders and is diverted around a further pulley 60 between these two stretches.
  • Pistons 6d and 6e in the tubes 6f of the cable arrangement maintain hydraulic isolation of the two cylinders l, 2.
  • the cylinders 1, 2 are provided with cylinder extensions 7 connected by ducts 8 and 9 to a two-position. fou r-port valve 10 whose slider or spool is shown at 10a.
  • a pump 11 has its outlet 13 connected to the valve 10 and its inlet 12 communicating with a water tank 14, the valve outlet 20, likewise being connected to the tank 14.
  • a branch 15 with an electrical heating de vice as represented at 16 This device has been shown in greater detail in FIG. 3 and may comprise a pair of fittings 16a and 16b upon which an insulating sleeve 16(- is threaded to form a heating chamber 160' provided with one or more resistance heating elements or rods 160. The latter are carried on respective plugs 16f threaded into the sleeve 16c and have terminals 16g connectable to line current or a generator as previously noted.
  • the heating device 18 is shown in greater detail in FIG. 2 and can comprise a fitting 18a threaded into the members 7 and carrying a sleeve 18b into which a lat eral fitting 18c is threaded.
  • the sleeve 18! may receive a plug 18d carrying a heating rod or element 180 whose terminals 18f are connectable to a source of electric current as previously described.
  • the bypass l7, 18 is disposed upon the underside of the cylinder.
  • the branches l5, l6 and l7, 18 provide heating pas sages of small cross-section parallel to the main passages and heat a portion of the water diverted along these auxiliary passages strongly before returning the heated portion to the main stream.
  • the pump 11 in one position of the 4/2 valve 10 from the tank 14 to one of the cylinders l, 2 whose piston is thereupon displaced toward the outlet 4 to drive tbs slurry therethrough, while dragging the other piston toward the end 7 of the respective cylinder via the cable 4.
  • the other piston Upon reversal of the valve 10, the other piston is displaced and the slurry is Forced through the outlet.
  • Respective contactless sensors (limit switches) 21 and 22 detect the advance of the pistons and operate a reversing switch 23 to control the valve 20 to reverse the system.
  • a piston pump for the displacement of a slurry comprising:
  • At least one cylinder adapted to receive a hydraulically displaceable piston and provided at one end with means for selectively connecting this cylinder to a slurry outlet and a slurry inlet; means forming at least one main passage for water constituting a hydraulic displacement medium connected to the other end of this cylinder and including a pump for displacing said hydraulic medium for shifting said piston and displacing said slurry in through said inlet and out through said outlet;
  • At least one electric heating element in said branch passage is at least one electric heating element in said branch passage.
  • said means forming said main passage includes a water tank, said pump for hydraulic medium having an intake side connected to said water tank and a discharge side, a distribution valve connected to said discharge side and to each of said cylinders at the respective other end, a duct interconnecting said sides of said pump, and an electric heating element in the latter duct.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US459114A 1973-04-06 1974-04-08 Piston pump for viscous materials Expired - Lifetime US3918849A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19737313038U DE7313038U (de) 1973-04-06 1973-04-06 Kolbenpumpe

Publications (1)

Publication Number Publication Date
US3918849A true US3918849A (en) 1975-11-11

Family

ID=6637888

Family Applications (1)

Application Number Title Priority Date Filing Date
US459114A Expired - Lifetime US3918849A (en) 1973-04-06 1974-04-08 Piston pump for viscous materials

Country Status (5)

Country Link
US (1) US3918849A (de)
JP (1) JPS501406A (de)
DE (1) DE7313038U (de)
GB (1) GB1426846A (de)
IT (1) IT1005950B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439112A (en) * 1977-09-09 1984-03-27 Hk-Engineering Ab Method and apparatus for pumping viscous and/or abrasive fluids
FR2754859A1 (fr) * 1996-10-18 1998-04-24 Putzmeister Ag Dispositif et procede de pompage de melanges liquides epais
US6299416B1 (en) * 1998-10-10 2001-10-09 Daewoo Heavy Industries Ltd. Bulk material pump device
CN102734108A (zh) * 2012-07-02 2012-10-17 山东中探机械有限公司 四缸泥浆泵
US20150343405A1 (en) * 2012-02-24 2015-12-03 Biochemtex S.P.A. Continuous process for conversion of lignin to useful compounds
CN105298789A (zh) * 2015-10-29 2016-02-03 湖南三一路面机械有限公司 一种泵送系统及工程机械

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429267A (en) * 1967-03-27 1969-02-25 Dynatran Corp Of Illinois Material pumping assembly
US3749525A (en) * 1970-08-03 1973-07-31 D Hooper Hydraulically operated fluid aggregate pump

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429267A (en) * 1967-03-27 1969-02-25 Dynatran Corp Of Illinois Material pumping assembly
US3749525A (en) * 1970-08-03 1973-07-31 D Hooper Hydraulically operated fluid aggregate pump

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439112A (en) * 1977-09-09 1984-03-27 Hk-Engineering Ab Method and apparatus for pumping viscous and/or abrasive fluids
FR2754859A1 (fr) * 1996-10-18 1998-04-24 Putzmeister Ag Dispositif et procede de pompage de melanges liquides epais
US6299416B1 (en) * 1998-10-10 2001-10-09 Daewoo Heavy Industries Ltd. Bulk material pump device
US20150343405A1 (en) * 2012-02-24 2015-12-03 Biochemtex S.P.A. Continuous process for conversion of lignin to useful compounds
US9770698B2 (en) * 2012-02-24 2017-09-26 Biochemtex S.P.A. Continuous process for conversion of lignin to useful compounds
CN102734108A (zh) * 2012-07-02 2012-10-17 山东中探机械有限公司 四缸泥浆泵
CN105298789A (zh) * 2015-10-29 2016-02-03 湖南三一路面机械有限公司 一种泵送系统及工程机械

Also Published As

Publication number Publication date
JPS501406A (de) 1975-01-09
DE7313038U (de) 1973-07-19
IT1005950B (it) 1976-09-30
GB1426846A (en) 1976-03-03

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