US3628897A - Valve and pump - Google Patents

Valve and pump Download PDF

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Publication number
US3628897A
US3628897A US868020A US3628897DA US3628897A US 3628897 A US3628897 A US 3628897A US 868020 A US868020 A US 868020A US 3628897D A US3628897D A US 3628897DA US 3628897 A US3628897 A US 3628897A
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US
United States
Prior art keywords
valve
pump
cylinder
opening
housing
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
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US868020A
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English (en)
Inventor
Georg Stetter
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Individual
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Individual
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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
    • 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
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0003—Piston machines or pumps characterised by having positively-driven valving the distribution member forming both the inlet and discharge distributor for one single pumping chamber
    • F04B7/0011—Piston machines or pumps characterised by having positively-driven valving the distribution member forming both the inlet and discharge distributor for one single pumping chamber and having an oscillating movement
    • 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 invention relates to a valve for a pump, and a pump including the valve.
  • the invention relates to a valve and a pump for concrete or the like.
  • Hydraulically driven piston pumps for conveying concrete, mortar or similar substances are known.
  • material is drawn into a cylinder and then forced out by a piston into a delivery pipe.
  • the piston draws the material to be pumped from an inlet arrangement into a cylinder.
  • the piston pump is generally arranged with its axis horizontal so that if, as is usual, the material comes from a hopper above the pump, it must be deflected through a right angle.
  • Concrete pumps of this type are generally arranged on vehicles, which limits the possible height of the hopper, and means that the amount of material drawn into the cylinder on the suction stroke may not be very large compared with the space available in the cylinder.
  • a valve for a pump said valve including a housing having an inlet conduit, an outlet and an opening connectable to the cylinder of a pump, and a rotary part having its axis of rotation perpendicular to the axes of the inlet conduit and the opening, and being rotatable to form a part of either a passage between the opening and the inlet conduit or a passage between the opening and the outlet, the passage between the opening and the inlet conduit having the form of a pipe bend.
  • valve is included in a pump having a cylinder with a piston movable therein which cylinder is connected to the valve opening, a delivery pipe connected to the valve outlet, the valve inlet conduit being connectable to a source of material to be pumped.
  • the invention is based on the fact that deflection to the stream of material in its passage into the pump is unavoidable. However, if it is passed through a passage which has the form of a pipe bend, which is arranged in the immediate vicinity of the pump cylinder, the quantity of material which is now moved backwards and forwards but is not pumped out can be reduced to a minimum. If in addition, the pipe bend is combined with a valve such as that of the invention, the distance between the inlet and the cylinder is greatly reduced, and the efficiency of the pump is increased.
  • the invention avoids intermediate tubular elements between the valve and the pipe bend or between these parts and the cylinder, cleaning is also simplified and the number of components to be cleaned is reduced.
  • the valve housing is dismantled, the cylinder and the inlet arrangement are directly accessible. This also allows easy replacement of components.
  • the passage from the valve inlet to the opening connectable to the cylinder is curved, that between the opening and the outlet may be substantially straight, at least to the extent that the cylinder and outlet may I be parallel and slightly offset. 7
  • the cylinder will be substantially horizontal, while the material will pass substantially vertically into the inlet conduit of the valve. Material will be deflected through a right angle in the suction stroke, and conveyed almost straight in the other stroke when the valve is switched to its other position.
  • the rotary part of the valve is advantageously constructed like a shutter.
  • the two possible passages in the valve are therefore defined by the rotary part and the valve housing. This construction has advantages in manufacture, it also means that the number of moving surfaces subject to wear is small and that the valve can be cleaned easily.
  • the opening in the valve housing to which is attached the cylinder may have a rhombic cross section, and the ends of the two valve passages which cooperate with this connection may also have this form.
  • the rotary part is, as it may be, of rhombic shape, it offers the advantage that a passage is closed by a quick reduction in cross-sectional area at first, followed by an increasingly slow reduction. This closing action is suitable in the case of concrete pumps, because the initial quick closing means that few stones and lumps will get wedged in the valve, and those which do will be broken during the later, slow closing.
  • Iron cladding may be provided at the rhombic corners of the rotary part and the valve housing, particularly as it is in the vicinity of the comers that the greatest stresses are set up during closing of a passage. Iron cladding may not otherwise be required.
  • edges of the rotary part which sealingly engage the housing may have a plurality of concentric or parallel grooves. These grooves will be quickly filled with fine concrete during operation, so that the coacting surfaces of the control slide valve and of the housing are protected from metallic wear. In addition, a good sealing action is obtained, since the concrete in the notches acts as packing.
  • valve When setting up the pump with the valve, it is useful to support the valve on a pivot so that it may be pivoted, preferably about the vertical to make the cylinder and the valve accessible for cleaning purposes.
  • a pump of the invention may be used on its own, it is preferable to have two or more pumps arranged together, with their pistons pumping in turn. If two pumps are provided, their pistons may be driven from a single drive means. It is advantageous to feed material directly from a hopper to each valve inlet conduit, rather than to divide a single feed member. If the valves are pivoted, it is advantageous to have a separate valve drive for each.
  • FIG. 1 is a side elevation of the essential parts of a pump according to the invention including a valve according to the invention
  • FIG. 2 is an enlarged view of a part of FIG. 1,
  • FIG. 3 is a rear view of a road vehicle with a pump according to the invention fixed thereto,
  • FIG. 4 is an enlarged view of a part of FIG. 3,
  • FIG. 5 is a longitudinal section through a rotary slide valve according to the invention.
  • FIG. 6 is a cross-sectional view taken on the line Vl-VI of FIG. 5.
  • the pump consists essentially of the cylinders l, the valves 2 and 3 and the inlet or supply arrangement 4. Only one cylinder 1 is visible in FIGS. 1 and 2 of the drawing, said cylinder being associated with the control valve 2.
  • the valve 3, however, is associated with a similar pump cylinder, which is arranged parallel to the pump cylinder 1.
  • the pump is fixed on the frame 5 of the vehicle 6, so that the essential parts of the pump which require maintenance are easily accessible.
  • the supply arrangement 4 consists essentially of a storage container 7 and inlet hoppers 8.
  • the inlet hoppers 8 are made of two parts.
  • the upper part 9 is connected fast to the container 7, while the lower part 10 is constructed as an inlet conduit fitted to the appropriate valve housing 11.
  • the joints 12 between parts 9 and 10 are inclined, which is an advantage when the valves are pivoted out of position.
  • the sealing at 12 is advantageously a rubber packing or the like.
  • the part 13 of the valve housing 11 which leads to the cylinder is kept very short.
  • the opening 14 into the cylindrical chamber 15 has a rhombic form.
  • the piston in the cylinder is not shown in detail. lts stroke extends as far as the joint between the cylinder 1 and valve housing ll.
  • the rotary part 16 of the valve has the form of a shutter, and is adapted to turn about the pivot 17.
  • the crank 20 is clamped on to the square end 18 of the valve shaft 19, the piston rod 21 of the control cylinder 22 acting on the said crank.
  • This control cylinder is adapted to pivot about joint 23 and the pivot bearing 24 is supported on the support element 25, which is adapted to pivot about the shaft 28 together with the valve housing.
  • Passage 29 is the passage from the inlet to the cylinder opening, and is formed as a pipe bend which is used during the suction stroke, in which the inlet passage 10 is connected to the cylinder.
  • the passage 30 forms part of the passage from the outlet 32 to the opening to the cylinder. This is the case during the compression stroke, when material is delivered into and through pipe 31.
  • the center line 33 of inlet conduit 10 with the center line 34 of opening 14 enclose an angle of about 70, the passage formed from inlet conduit to opening being curved.
  • the center lines of the inlet conduit 10, the opening 14 and outlet 32 are substantially coplanar.
  • the passage formed for use during the compression stroke of the piston is only slightly curved, the center line 35 of outlet 32 being slightly offset with respect to center line 34 of opening 14, but parallel thereto.
  • valve housing which cooperates with the edge 36 of the rotary part is adapted to the rhombic shape thereof. This can be seen in FIG. 5.
  • Cladding 38 is provided on the rotary part, and cooperating cladding 37 is disposed in the opening 14 and in the valve housing.
  • the rotary part has on all its external edges grooves 39, which extend parallel to the pivot axis 17.
  • a valve assembly for a pump comprising in combination:
  • c. means defining an outlet from said housing and having a center line
  • d. means defining an opening in said housing for communication with the chamber of said pump, and having a center line;
  • a rotary valve disposed within said chamber and having an axis of rotation
  • said rotary valve forming a wall transverse to said axis of rotation defining, within said chamber, two passages;
  • the second of said passages being substantially straight; said rotary valve being rotatable to a first position effective to allow communication between said inlet conduit and said opening through said first passage, and to a second position effective to allow communication between said opening and said outlet through. said second passages, said axis of rotation being perpendicular to said passage; whereby said rotary valve is in said first position during the suction stroke of said pump and in said second position during the compression stroke of said pump.
  • center lines of said inlet conduit, outlet means and opening means are substantially coplanar, and said center lines of said opening means and said outlet means are substantially straight and substantially parallel.
  • a pump comprising in combination:
  • valve assembly comprising in combination:
  • c. means defining an outlet from said housing and having a center line
  • a rotary valve disposed within said chamber and having an axis of rotation
  • said rotary valve forming a wall transverse to said axis of rotation defining, within said chamber, two passages;
  • said rotary valve being rotatable to a first position effective to allow communication between said inlet conduit and said opening through said first passage, and to a second position effective to allow communication between said opening and said outlet through said second passage, said axis of rotation being perpendicular to said passages;
  • said inlet conduit of said valve being connectable to a source of material to be pumped
  • a pump comprising in combination: 1. two valves, each valve comprising in combination:
  • a housing defining a chamber; b. an inlet conduit to said housing; c. means defining an outlet from said housing and having a centerline;
  • each of said chambers in the form of a cylinder, each of said cylinders having an open end connectcd to said opening means of one of said valves respectively at said open end;
  • each piston being movable within one of said 9 defining opening in i housing for f cylinders, respectively, to a first position defining a suci the chamber of Said pump and havmg tion stroke, and movable to a second position defining a C d h compression stroke;
  • a i gable (.jlspsed wthm Said chamber an avmg 4.
  • two delivery pipes, each pipe being connected to said outf is f n t t l 5 let means of one of said valves respectively;
  • the second of said passages being substantially straight; 2:2 :22;' ilsizfi lfzsgi g gfgkz gfgrl l izzgg P said rotary valve being rotatable to a first position effective to g p y allow communication between said inlet conduit and said 3'

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
US868020A 1968-10-30 1969-10-21 Valve and pump Expired - Lifetime US3628897A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681805972 DE1805972A1 (de) 1968-10-30 1968-10-30 Betonpumpe

Publications (1)

Publication Number Publication Date
US3628897A true US3628897A (en) 1971-12-21

Family

ID=5711900

Family Applications (1)

Application Number Title Priority Date Filing Date
US868020A Expired - Lifetime US3628897A (en) 1968-10-30 1969-10-21 Valve and pump

Country Status (5)

Country Link
US (1) US3628897A (enrdf_load_stackoverflow)
DE (1) DE1805972A1 (enrdf_load_stackoverflow)
ES (1) ES372565A1 (enrdf_load_stackoverflow)
FR (1) FR2021888A1 (enrdf_load_stackoverflow)
GB (1) GB1266613A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3741691A (en) * 1969-12-20 1973-06-26 F Schwing Hydraulic piston pump assembly
US3860035A (en) * 1973-03-02 1975-01-14 Engineered Concrete Placer Inc Modified slurry pump
US4057373A (en) * 1974-08-24 1977-11-08 Friedrich Wilhelm Schwing Gmbh Multi-cylinder pump for concrete
US4303378A (en) * 1977-09-22 1981-12-01 Thomsen Equipment Company Concrete pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2317524A1 (fr) * 1975-07-09 1977-02-04 Prunet Jean Noel Pompe pour liquides charges

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2032163A (en) * 1932-09-30 1936-02-25 Ralph B Bagby Filling machine
US2125283A (en) * 1936-05-06 1938-08-02 Leo S Madlem Pump for semifluids
US2685259A (en) * 1950-10-02 1954-08-03 Chain Belt Co Valve chamber for concrete pumps
US3146721A (en) * 1960-08-08 1964-09-01 Schwing Friedrich Wilhelm Hydraulic piston pump for the pumping of viscous pulpy or plastic substances

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2032163A (en) * 1932-09-30 1936-02-25 Ralph B Bagby Filling machine
US2125283A (en) * 1936-05-06 1938-08-02 Leo S Madlem Pump for semifluids
US2685259A (en) * 1950-10-02 1954-08-03 Chain Belt Co Valve chamber for concrete pumps
US3146721A (en) * 1960-08-08 1964-09-01 Schwing Friedrich Wilhelm Hydraulic piston pump for the pumping of viscous pulpy or plastic substances

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3741691A (en) * 1969-12-20 1973-06-26 F Schwing Hydraulic piston pump assembly
US3860035A (en) * 1973-03-02 1975-01-14 Engineered Concrete Placer Inc Modified slurry pump
US4057373A (en) * 1974-08-24 1977-11-08 Friedrich Wilhelm Schwing Gmbh Multi-cylinder pump for concrete
US4303378A (en) * 1977-09-22 1981-12-01 Thomsen Equipment Company Concrete pump

Also Published As

Publication number Publication date
GB1266613A (enrdf_load_stackoverflow) 1972-03-15
ES372565A1 (es) 1972-02-16
FR2021888A1 (enrdf_load_stackoverflow) 1970-07-24
DE1805972A1 (de) 1970-06-11

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