US3331332A - Piston pump for conveying concrete or other masses of similar consistency - Google Patents

Piston pump for conveying concrete or other masses of similar consistency Download PDF

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Publication number
US3331332A
US3331332A US418438A US41843864A US3331332A US 3331332 A US3331332 A US 3331332A US 418438 A US418438 A US 418438A US 41843864 A US41843864 A US 41843864A US 3331332 A US3331332 A US 3331332A
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United States
Prior art keywords
discharge duct
valve
cylinder
inlet
piston pump
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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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US418438A
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English (en)
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Wennberg Olov Carl Gustav
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Individual
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Individual
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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
    • 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
    • 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
    • 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

  • This invention relates to piston pumps for conveying concrete or other masses of similar consistency, wherein feed pistons provided each in a working cylinder alternately force the mass from a supply container to a common discharge duct the inlet of which is alternately put into communication with the cylinders by means of a valve device.
  • feed pistons provided each in a working cylinder alternately force the mass from a supply container to a common discharge duct the inlet of which is alternately put into communication with the cylinders by means of a valve device.
  • a great number of different valve structures have been suggested for this purpose, but all of them suiIer from the inconvenience that they get worn after a short time, especially because of the strongly abrasive material which is passed through the pump.
  • the main object of the invention is to provide a valve device having a high abrasion resistance and durability.
  • the invention is characterized in that the inlet of the common discharge duct is common to both cylinders and that the total inlet area is at least twice the cross-sectional area of the through passage of the valve device. Due to this arrangement the valve member can be in the form of a simple short tube one end of which is always in direct communication with the inlet of the common discharge duct. Consequently, the alternate closure necessary in many of the prior-art structures is not required in a valve device according to the invention. Further, the tube of the valve can be given a simple reciprocating motion with its axis remaining parallel to itself during the motion.
  • the tubular valve may be provided with a cover plate which closes the portion of the common inlet which is actually non-operative.
  • the valve device may be essentially in the form of a slide with a through passage for the mass arriving from the cylinders. This slide is movable between a position in which the through passage registers with one of the cylinders and a second position in which the passage registers with the other cylinder. According to the most simple construction the movement of the valve is a pivotal movement about a revolving shaft which is advantageously parallel to the axis of the through passage.
  • FIG. 1 is a substantially vertical sectional view of the entire pump
  • FIG. 2 a corresponding end elevation viewed from the right in FIG. 1
  • FIG. 3 a corresponding top view
  • FIG. 4 is a vertical cross-sectional view taken along the line 44 in FIG. 1
  • FIG. 5 is a vertical cross-sectional view along the line 55 in FIG. 1.
  • the piston pump is mounted on a frame which is supported by wheels 12 mounted on a transverse axle 14.
  • the pump is combined with a container 16 for supplying the concrete mass.
  • the lower part of the supply container 16 has a part cylindrical bottom 18 and planar side walls 20, 22 which together form a valve casing in which a slide valve 24 is movable.
  • the slide valve 24 is secured to a shaft 26 which extends through the walls 20 and 22 and outside thereof is mounted in bearings 28.
  • the shaft 26 can be turned to and from by means of a pair of hydraulic pistons movable in cylinders 30 mounted each on one side of the shaft.
  • the pistons are articulated to a cross-piece 32 which is keyed onto the shaft 26.
  • valve member on the slide valve 24 consists essentially of a short tube 34 which by means of an arm 36- is secured to the shaft 26 and made integral with a cap 38 which encloses the shaft 26 and protects the shaft from the concrete mass in the container.
  • the lower end of the cap is connected to a pair of strippers 40, one on each side of the cap for engagement with the bottom 18 of the container 16.
  • the through passage 42 in the tube 34 of the slide valve can be put into communication with one or the other of two cylinders 44, 46 each of which is provided with a tubular piston 48 adapted to slide on a stationary plunger 50.
  • the piston 48- is closed at one end by a piston head 52 and surrounds the plunger rod 54 by means of a packing 56 at its other, outer end.
  • the outer end of the plunger rod 54 is secured to a pin 58 which is supported by a bracket 60 mounted on the frame 10.
  • the plunger 50, 54 has longitudinally extending ducts 62, 64 which alternately supply pressure liquid to the interior 66 of the piston 48 and withdraw the liquid therefrom.
  • FIG. 3 the piston 48 of the cylinder 46 is shown in an outer end position in which its stufling box 56 is close to the bracket 60, whereas the piston of the cylinder 44 is in an inner end position shown in FIG. 1.
  • the inner ends of the cylinders 44, 46 are bolted to a flanged ring 68 which is inserted in the wall 20.
  • the inner face of this ring cooperates with an annular knife 70 mounted on the inlet end of the tube 34.
  • the annular knife 70 serves to cut off the run of concrete when the slide is moving from a position registering with one of the cylinders 44, 46 to a position registering with the other cylinder.
  • the tube 34 has substantially the same crosssectional area as the cylinder 44 or 46 or a slightly greater cross-sectional area.
  • the tube 34 communicates with a discharge duct 72 the inlet 74 of which is common to both cylinders 44, 46, the total area of the inlet 74 being at least twice the cross-sectional area of each cylinder.
  • the shape of the inlet 74 is shown in FIG. 5. where the through passage 42 of the slide 34 is in the right-hand end position.
  • the slide valve is provided with a cover plate 76 which closes the portion of the common inlet 74 of the discharge duct 72 which is actually non-operative.
  • the discharge duct 72 is adapted to be connected to a suitable conveying pipe indicated by chain-dotted lines 78 in FIG. 1.
  • the mode of operation of the piston pump as described is substantially as follows. Concrete mass supplied into the container 16 also fills the lower part thereof so that the bottom 18 is covered except for the part which is screened by the strippers 40 on the slide valve 24. In the position shown in FIG. 4 the open end of the cylinder 46 is in communication with the interior of the container 16 whereas the tube 34 of the slide 24 registers with the cylinder 44. The piston 48 in the cylinder 46 is in its inner end position and is about to start a suction stroke. To this end pressure liquid is supplied for instance through the duct 64 to the rear side of the plunger 50 and at the same time liquid can be withdrawn from the interior 66 of the piston 48 through the duct 62.
  • the annular knife 7 cuts the flow of concrete when the valve is moving from one end position to the other end position.
  • the flow of concrete need not be cut off at the outlet end of the tube 34 of the valve because the inlet 74 of the discharge duct 72 is always in communication with the through passage 42 of the slide valve.
  • a piston pump for concrete and the like comprising plural feeding pistons, a discharge duct common to said pistons, said pistons being adapted alternately to force the pumped material to said common discharge duct, a valve device having a through passage and adapted to control the fiow of material into an inlet of said discharge duct, said inlet being common to both pistons and having a total inlet area at least twice the cross-sectional area of said through passage.
  • a valve slide having a through passage for said material, means to recpirocate the valve slide between feed positions, said valve slide in one position registering between one cylinder and said discharge duct and in a further position registering between another cylinder and said discharge duct, and a cover member on said valve slide to prevent flow of material from said through passage into one cylinder when the piston of another cylinder is feeding the discharge duct.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US418438A 1963-12-19 1964-12-15 Piston pump for conveying concrete or other masses of similar consistency Expired - Lifetime US3331332A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1423663 1963-12-19

Publications (1)

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US3331332A true US3331332A (en) 1967-07-18

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US418438A Expired - Lifetime US3331332A (en) 1963-12-19 1964-12-15 Piston pump for conveying concrete or other masses of similar consistency

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US (1) US3331332A (de)
DE (1) DE1453705A1 (de)
GB (1) GB1056478A (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3398693A (en) * 1966-08-01 1968-08-27 Danken Inc Concrete pumping apparatus
US3832097A (en) * 1971-12-16 1974-08-27 Putzmeister Interholding Gmbh Pump for concrete and other sludging materials
JPS503107U (de) * 1973-05-04 1975-01-14
US3877847A (en) * 1972-10-05 1975-04-15 Walter Scheele Kg Fa Concrete pump
US3989420A (en) * 1974-05-15 1976-11-02 J. I. Case Company Concrete pumping apparatus
US4019839A (en) * 1974-03-29 1977-04-26 Friedrich Wilhelm Schwing Gmbh Distributing valves for viscous materials
US4174788A (en) * 1976-10-04 1979-11-20 Casagrande & C. S.P.A. Batching plant for lime concrete
US5030069A (en) * 1990-01-30 1991-07-09 Olson David A Material moving pump
JPH05202844A (ja) * 1983-02-12 1993-08-10 Rudolf Riker コンクリートポンプ
CN105275792A (zh) * 2014-07-22 2016-01-27 中联重科股份有限公司 一种混凝土泵送装置的分配装置及混凝土泵送装置
US10900302B2 (en) 2018-07-27 2021-01-26 Country Landscapes & Tree Service, LLC Directional drilling systems, apparatuses, and methods

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1053265B (it) * 1975-11-24 1981-08-31 Fogt Indmasch Dispositivo distributore del fluido di comando per un gruppo pompante per calcestruzzo o simili
DE2909964A1 (de) * 1979-03-14 1980-09-25 Schwing Gmbh F Dickstoffpumpe, insbesondere fuer beton
DE2933128C2 (de) * 1979-08-16 1985-09-26 Friedrich Wilh. Schwing Gmbh, 4690 Herne Dickstoffpumpe, insbesondere zur Förderung von Beton
DE3419832A1 (de) * 1984-05-26 1985-11-28 Karl Dipl.-Ing. 7000 Stuttgart Schlecht Rohrweiche einer dickstoff, insbesondere beton foerdernden doppelkolbenpumpe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US863004A (en) * 1906-09-14 1907-08-13 Harry F Smith Valve for gas-producers.
FR910526A (fr) * 1945-04-27 1946-06-11 Pompe à béton
US2467945A (en) * 1944-03-03 1949-04-19 Blaw Knox Co Valve for gas ducts
US3146721A (en) * 1960-08-08 1964-09-01 Schwing Friedrich Wilhelm Hydraulic piston pump for the pumping of viscous pulpy or plastic substances
US3181469A (en) * 1963-02-07 1965-05-04 Hydro Con Corp Concrete pumping apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US863004A (en) * 1906-09-14 1907-08-13 Harry F Smith Valve for gas-producers.
US2467945A (en) * 1944-03-03 1949-04-19 Blaw Knox Co Valve for gas ducts
FR910526A (fr) * 1945-04-27 1946-06-11 Pompe à béton
US3146721A (en) * 1960-08-08 1964-09-01 Schwing Friedrich Wilhelm Hydraulic piston pump for the pumping of viscous pulpy or plastic substances
US3181469A (en) * 1963-02-07 1965-05-04 Hydro Con Corp Concrete pumping apparatus

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3398693A (en) * 1966-08-01 1968-08-27 Danken Inc Concrete pumping apparatus
US3832097A (en) * 1971-12-16 1974-08-27 Putzmeister Interholding Gmbh Pump for concrete and other sludging materials
US3877847A (en) * 1972-10-05 1975-04-15 Walter Scheele Kg Fa Concrete pump
JPS503107U (de) * 1973-05-04 1975-01-14
US4019839A (en) * 1974-03-29 1977-04-26 Friedrich Wilhelm Schwing Gmbh Distributing valves for viscous materials
US3989420A (en) * 1974-05-15 1976-11-02 J. I. Case Company Concrete pumping apparatus
US4174788A (en) * 1976-10-04 1979-11-20 Casagrande & C. S.P.A. Batching plant for lime concrete
JPH05202844A (ja) * 1983-02-12 1993-08-10 Rudolf Riker コンクリートポンプ
US5030069A (en) * 1990-01-30 1991-07-09 Olson David A Material moving pump
CN105275792A (zh) * 2014-07-22 2016-01-27 中联重科股份有限公司 一种混凝土泵送装置的分配装置及混凝土泵送装置
CN105275792B (zh) * 2014-07-22 2017-11-21 中联重科股份有限公司 一种混凝土泵送装置的分配装置及混凝土泵送装置
US10900302B2 (en) 2018-07-27 2021-01-26 Country Landscapes & Tree Service, LLC Directional drilling systems, apparatuses, and methods

Also Published As

Publication number Publication date
DE1453705A1 (de) 1969-09-18
GB1056478A (en) 1967-01-25

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