US3829254A - Pump for concrete and the like - Google Patents

Pump for concrete and the like Download PDF

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Publication number
US3829254A
US3829254A US00300360A US30036072A US3829254A US 3829254 A US3829254 A US 3829254A US 00300360 A US00300360 A US 00300360A US 30036072 A US30036072 A US 30036072A US 3829254 A US3829254 A US 3829254A
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US
United States
Prior art keywords
tube
pump
cylinders
delivery conduit
pivot tube
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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
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US00300360A
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English (en)
Inventor
G Stetter
E Pieper
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Individual
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Individual
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Publication date
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Publication of US3829254A publication Critical patent/US3829254A/en
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    • 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
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0019—Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers
    • F04B7/0034—Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers and having an orbital movement, e.g. elbow-pipe type members
    • 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

  • ABSTRACT A pump for concrete, cement, or like fluent medium having two oppositely-acting piston/cylinder units which alternately feed the fluent medium from a hopper to a delivery conduit.
  • a pivotal tube is used to connect the discharge ends of the cylinders in turn to the delivery conduit.
  • This invention relates to a pump for concrete or other media which can be pumped, for example cement or the like.
  • Concrete pumps generally comprise two piston/cylinder units which are arranged parallel to one another and have their pistons driven oppositely so that the pressure stroke of one piston follows on the pressure stroke of the other.
  • the aim is to achieve as uniform a delivery of concrete or the like as possible because it is important to keep variations in the speed of travel of the delivered concrete to a minimum. In particular the aim is to avoid the pumped material coming to rest and causing blockages.
  • Valve units associated with the cylinders are disposed at the ends of the latter and as a rule are located above the inlets from the supply container, which may for example be of hopper form, from which the concrete or the like flows to the valves.
  • This arrangement has to be used because the reduced pressure set up during the suction strokes is not adequate to fill the cylinders rapidly enough and the weight of the pumped medium in the supply container is required to assist this procedure.
  • This pipe system which is of the hose type, involves various disadvantages. Whereas the pumped medium only pauses for a short period in the zone of the valve unit and a cylinder, namely only during the time that the piston takes to reverse from the suction stroke to the pressure stroke or vice versa, the period of arrest of the pumped medium in the parts of the hose-pipe is substantially longer. The material is stationary during the whole of the suction stroke of the cylinder concerned.
  • the object of the present invention is to provide a pump for concrete or other expressed media in which the disadvantages of the hose-type pipe are avoided as are also the undesirable rapid changes in crosssectional flow area in the direction of travel of the medium, and abrupt changes in direction of this medium.
  • the present invention provides a pump for concrete or the like comprising two cylinders and pistons which are adapted to be for forwarding the pumped media delivered from the two piston-cylinder arrangements: to a common delivery conduit, characterised by the fact that the valve arrangement comprises a pivot tube disposed between the discharge ends of said pistons and the entrance to said delivery conduit, this pivot tube being pivotable between positions in which it alternately connects the discharge end of one and the other of said discharge ends of the pistons to the entrance of the delivery conduit.
  • the pivot tube used in accordance with the invention thus fulfils the same function as the known type of valve and the function of the known hose-type pipe.
  • the pivot tube may be of substantially uniform crosssection, but it is also possible in the invention for it to be varied uniformly, for example tapered, in the direction of flow.
  • the uniformity in internal cross-section of the pivot tube prevents any blockages and depositing of medium in this zone. Since only a single pivot tube is provided for the pump with its two cylinders, this tube being associated firstly with one cylinder and then with the other during the pressure strokes thereof, there is a continuous flow through the pivot: tube apart from the very short transitory periods when it is changed over from one position to the other. This provides a positive means of preventing segregation out of the medium and blockages which would be associated with this.
  • the pivot tube may be slightly curved, or it can be rectilinear.
  • the pivot tube is pivotable substantially in the common medial plane to the two cylinders. This enables a rectilinear pivot tube to be used and the amount of diversion of the stream of pumped medium is determined only by the distance of the two cylinders from the central plane between them. If the pivot tube is of adequate length the angle of diversion is relatively small.
  • the pivot tube can be moved in standard fashion through a linkage. It is however preferred to operate the pivot tube through its pivot shaft because the sealingsurfaces then involved need only be very small.
  • the pivot tube is movable in a housing and part of the inner wall of this housing defines with the adjacent outer surface of the pivot tube a duct which connects the supply container to the cylinder during the suction stroke of the latter. It is of advantage to make the outer surface of the pivot tube of inclined wedge form so that it will slide beneath the pumped medium at the end of the suction stroke.
  • the pivot tube is made in two parts, namely one part which is of tubular form and has the wedgeform outer surface referred to, and a second part which fits over the pivot shaft.
  • FIG. 1 is a longitudinal section on the line I-I of FIG. 2 through a pump constructed in accordance with the invention
  • FIG. 2 is a horizontal section through the pump taken on the line IIII of FIG. 1,
  • FIG. 3 is a horizontal section corresponding to that of FIG. 2 but showing the pump in another operating condition
  • FIG. 4 is a cross-section on the line IVIV of FIG. 1, with the pivot tube in a central position.
  • a pivot tube 1 is mounted in the valve housing 12 and is movable through the agency of a shaft 11 which rotates about an axis 10.
  • Shaft 11 is operated by an oilhydraulic pivot motor 30, but the latter could be replaced by any other convenient hydraulic arrangement or other operating mechanism.
  • the valve housing 12 is connected to a concrete pump housing 22 by means of hinge bolts 20 and 21, and cylinders 2 and 3 are arranged in this housing.
  • a piston 23 is provided in each cylinder and is operated in known fashion by a piston rod 24, the pistons of the two cylinders 2 and 3 being arranged to move oppositely to one another.
  • the pivot tube 1 is alternately connected to the ends and 6 of the cylinders 2 and 3 respectively.
  • the piston 23 of cylinder 2 is performing a compression stroke and forces the previously indrawn pumped medium from the interior of tube 1 in the direction of the delivery conduit 9.
  • the end 4 of the pivot tube has a larger internal cross-section then the end 7 of this pivot tube 1 facing the entrance 8 of the delivery conduit 9. This provides a smooth transition between the differing cross-sections of the cylinders and the delivery conduit 9.
  • the outer surfaces and 16 of the pivot tube are of inclined wedge form, as can be seen from FIG. 4. This facilitates the shifting of the pivot tube beneath the pumped medium in duct 25 or in duct 26.
  • Duct 26 is associated in the same way with the cylinder 2 during the suction stroke of the latter as is duct 25 with cylinder 3.
  • the arrangement of the pump parts in the present invention has the advantage that the substantial pressure which is exerted by the pump does not act, or only acts to a negligible extent, on the sealing surfaces and the bearing surfaces of the valve arrangement.
  • the pivot tube 1 has substantially the same cross-sectional areas exposed at both ends to pressure, the surfaces 27 and 28 which partially act as sealing surfaces having a pressure function at the end 7 to balance the pressure effect.
  • the pivot tube is practically in two parts, being largely made up of part 18 of tubular form and the part 19 which also carries the pivot shaft 11.
  • a pump for pumping concrete and the like fluent media having a supply container for supplying the fluent media to the pump, two cylinders in communication with said supply container each cylinder having a discharge opening and a piston movably disposed therein, means for operating said pistons in mutually opposed motion so that as the piston in one of said cylinders performs a delivery stroke the piston in the other of said cylinders performs an intake stroke, a delivery conduit for delivering the fluent media from the pump, said delivery conduit having an entrance end, and a valve arrangement for alternately directing the fluent media from respective ones of said discharge openings of said cylinders the pistons of which are performing a delivery stroke, to the entrance end of said delivery conduit
  • said valve arrangement comprises: housing means fixedly disposed between said cylinder and said delivery conduit and communicating with said supply container; a pivot tube movably mounted within said housing means, said pivot tube having one end in permanent communication with the entrance end of said delivery conduit and downwardly depending skirt portions, the outside surface of which are of inclined wedge shape;
  • pivot tube comprises two parts, namely a tubular part with said wedge-shaped skirt portions and an actuating part formed to fit over a pivot shaft.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US00300360A 1971-10-26 1972-10-24 Pump for concrete and the like Expired - Lifetime US3829254A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2153204A DE2153204C3 (de) 1971-10-26 1971-10-26 Zweizylindrige Betonpumpe mit einem Betonflußschieber

Publications (1)

Publication Number Publication Date
US3829254A true US3829254A (en) 1974-08-13

Family

ID=5823383

Family Applications (1)

Application Number Title Priority Date Filing Date
US00300360A Expired - Lifetime US3829254A (en) 1971-10-26 1972-10-24 Pump for concrete and the like

Country Status (6)

Country Link
US (1) US3829254A (de)
DE (1) DE2153204C3 (de)
ES (1) ES407974A1 (de)
FR (1) FR2158963A5 (de)
GB (1) GB1360299A (de)
IT (1) IT969640B (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920357A (en) * 1974-03-13 1975-11-18 Case Co J I Pumping apparatus
US4057373A (en) * 1974-08-24 1977-11-08 Friedrich Wilhelm Schwing Gmbh Multi-cylinder pump for concrete
US4173436A (en) * 1977-06-03 1979-11-06 Maschinenfabrik Walter Scheele Kg Pivotable pipe slide for use in a two cylinder concrete pump
EP0854285A2 (de) * 1997-01-17 1998-07-22 Gian Guido Ravellini Betonpumpe
US5865606A (en) * 1997-05-07 1999-02-02 Huang; Yu Lin Slurry supplying mechanism
US6776558B1 (en) * 1999-12-08 2004-08-17 Putzmeister Ag Method and arrangement for concreting vertical shafts
US20090065074A1 (en) * 2006-01-23 2009-03-12 Xiaogang Xi Distribution valve for concrete transport pump
US20100202895A1 (en) * 2009-02-10 2010-08-12 Innoventor, Incorporated Multi-chambered pump
US20130263947A1 (en) * 2011-04-22 2013-10-10 Sany Heavy Industry Co., Ltd. Pumping mechanism, distributing valve thereof and concrete pumping machine
US20210221024A1 (en) * 2020-01-21 2021-07-22 Tindall Corporation Grout vacuum systems and methods

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2814845C3 (de) * 1978-04-06 1981-06-11 Stetter Gmbh, 8940 Memmingen Betonflußsteuerschieber einer Betonpumpe mit einem s-förmigen Schwenkrohr
IT1132633B (it) * 1980-09-03 1986-07-02 Libra Sa Dispositivo per il pompaggio di materiale pastoso,specialmente di calcestruzzo

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920357A (en) * 1974-03-13 1975-11-18 Case Co J I Pumping apparatus
US4057373A (en) * 1974-08-24 1977-11-08 Friedrich Wilhelm Schwing Gmbh Multi-cylinder pump for concrete
US4173436A (en) * 1977-06-03 1979-11-06 Maschinenfabrik Walter Scheele Kg Pivotable pipe slide for use in a two cylinder concrete pump
EP0854285A2 (de) * 1997-01-17 1998-07-22 Gian Guido Ravellini Betonpumpe
EP0854285A3 (de) * 1997-01-17 1999-11-24 Gian Guido Ravellini Betonpumpe
US5865606A (en) * 1997-05-07 1999-02-02 Huang; Yu Lin Slurry supplying mechanism
US6776558B1 (en) * 1999-12-08 2004-08-17 Putzmeister Ag Method and arrangement for concreting vertical shafts
US20090065074A1 (en) * 2006-01-23 2009-03-12 Xiaogang Xi Distribution valve for concrete transport pump
US20100202895A1 (en) * 2009-02-10 2010-08-12 Innoventor, Incorporated Multi-chambered pump
US8231362B2 (en) 2009-02-10 2012-07-31 Innoventor Renewable Power, Inc. Multi-chambered pump
US20130263947A1 (en) * 2011-04-22 2013-10-10 Sany Heavy Industry Co., Ltd. Pumping mechanism, distributing valve thereof and concrete pumping machine
US20210221024A1 (en) * 2020-01-21 2021-07-22 Tindall Corporation Grout vacuum systems and methods
US11951652B2 (en) * 2020-01-21 2024-04-09 Tindall Corporation Grout vacuum systems and methods

Also Published As

Publication number Publication date
FR2158963A5 (de) 1973-06-15
DE2153204B2 (de) 1979-07-12
ES407974A1 (es) 1975-10-01
DE2153204C3 (de) 1980-03-27
DE2153204A1 (de) 1973-05-03
IT969640B (it) 1974-04-10
GB1360299A (en) 1974-07-17

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