EP0317716B1 - Suction and force plunger pump - Google Patents

Suction and force plunger pump Download PDF

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Publication number
EP0317716B1
EP0317716B1 EP88114447A EP88114447A EP0317716B1 EP 0317716 B1 EP0317716 B1 EP 0317716B1 EP 88114447 A EP88114447 A EP 88114447A EP 88114447 A EP88114447 A EP 88114447A EP 0317716 B1 EP0317716 B1 EP 0317716B1
Authority
EP
European Patent Office
Prior art keywords
pump
ring
packing
pumping chamber
sealing device
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
Application number
EP88114447A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0317716A3 (en
EP0317716A2 (en
Inventor
Davide Trevisani
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.)
Soilmec SpA
Original Assignee
Soilmec SpA
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 Soilmec SpA filed Critical Soilmec SpA
Publication of EP0317716A2 publication Critical patent/EP0317716A2/en
Publication of EP0317716A3 publication Critical patent/EP0317716A3/en
Application granted granted Critical
Publication of EP0317716B1 publication Critical patent/EP0317716B1/en
Expired 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
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/109—Valves; Arrangement of valves inlet and outlet valve forming one unit
    • F04B53/1092—Valves; Arrangement of valves inlet and outlet valve forming one unit and one single element forming both the inlet and outlet closure member
    • 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
    • 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
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/1097—Valves; Arrangement of valves with means for lifting the closure member for pump cleaning purposes
    • 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
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/144—Adaptation of piston-rods
    • F04B53/147—Mounting or detaching of piston rod
    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • F04B53/166—Cylinder liners

Definitions

  • the present invention relates to a hydraulic suction and force plunger pump adapted to operate at high pressures particularly for injecting cement mixtures to improve the mechanical and hydraulic characteristics of the soil.
  • Reciprocating pumps with multiple cylinders arranged side by side in a line, with a respective single-action suction and force plunger sliding in each cylinder, are already used in consolidating or waterproofing the soil by means of high pressure cement injection.
  • the plungers are actuated by a single crankshaft by means of respective cross-head connecting rods.
  • a double acting multicylinder mud pump having a hydraulic powered piston in a cylinder which connects with a piston rod, which in turn drives a second piston in a cylinder to pump fluid mud.
  • the first piston is driven by hydraulic oil delivered under pressure to intake manifolds through independently driven val- ving apparatus which times the delivery of the hydraulic fluid for the main power stroke and further times the discharge of the hydraulic fluid for the return secondary power stroke, the system being controlled independently of piston action in timing of multiple pistons in multiple cylinders by the valve system.
  • the aim of the present invention is therefore to improve the structure of plunger pumps so as to make their manufacture and their use more economical and facilitate and speed the replacement of worn parts and the restoration of the best efficiency and durability conditions.
  • an object of the invention is to provide a pump wherein the packing-gland sealing device and plunger which can be simply and rapidly replaced even at the worksite where the pump is used.
  • the pump has a body which is longitudinally separated into three box-like parts 1, 2 and 3, removably associated for example by means of screw elements 4 and 5.
  • the body rests on the ground directly with the part 1 and with elements 6 protruding downwards from the part 3 which is the least high of the three abovementioned parts.
  • the interior of part 1 is connected to the interior of the central part 2 by means of wide vertical openings 7 and, starting from the related wall which is transverse to the pump, is downwardly tapered.
  • the axis of the horizontal crankshaft 9, having in particular three cranks keyed at 120 degrees to one another, is arranged in the transverse plane 8 which separates parts 1 and 2.
  • end supports 10 of the shaft 9 are applied both to the end part 1 and to the central one 2, at the co-planer faces thereof which are vertical and longitudinal to the pump and also at openings which affect, in said lateral faces, part 1 for half of their extension and part 2 for the other half; similarly, half of the main bearings, not illustrated, correspond to part 1 and the other half to part 2.
  • Each of the big ends of connecting rods 11 is articulated to the respective crank of the crankshaft 9; by means of a pin 12, the small end of each connecting rod 11 is then articulated to the body 13 of a cross-head 14 having skids, the guides 15 whereof are mounted within the central part 2 of the pump body.
  • a respective stem 16 is fixed to the body 13 of each cross-head and penetrates into the other end part 3, passing through a gasket- ed ring 17 which is applied to the wall dividing parts 2 and 3.
  • Each stem 16 has a plunger 18 of the suction and force and single-action type.
  • the stems and the respective plungers, which extend longitudinally with respect to the pump, are connected to one another by quick couplings 19 of the collar type.
  • each stem 16 and of each plunger 18 have a truncated-cone configuration, diverging towards each other, and are closed and locked by two- collar elements 20 which have an inner groove 20a with a configuration which is complementary to that of said ends. Proximate to their separation plane, the two half-collars 20 furthermore have superimposed tabs which, mutually hinged at pivot 21 and are furthermore locked at the opposite position by a screw element 22. Access to the couplings 19 is gained through openings 23 with which the upper face of part 3 of the body is provided: naturally, in order to rapidly open the couplings and release the stems 16 from the plungers 18, the elements 22 should be conveniently positioned upwards, as shown in the figures.
  • the openings 23 are normally closed by a cover 24 which is pivoted to the central part 2 at pivot 25.
  • the respective openings of the lateral faces of said part 2 are closed by hatches 26; the front openings of the end part 1 are closed by hatches 27 and 28.
  • a block 29 is rigidly associated with the front of part 3, and as many pump chambers 31 as there are plungers 18 are defined therein side by side and in a row at respective longitudinal through seats 30; each of said plungers enters its respective pumping chambers at a sealing device 32 with packing gland 33, the gasket element and casing whereof are respectively indicated at 34 and 35.
  • the casing 35 is largely external to the block 29 and protrudes towards the coupling 19; inside said block it practically lines the pumping chamber 31 and, in the region opposite to the coupling 10, it forms a sort of dome 35a and ends with an external protrusion which has a groove 36.
  • a ring 37 screwed into the threaded hole of a respective part 38, is axially but not tangentially engaged hereat with the casing, and is fixed to the block 29, by means of screw elements 39, and at the opening which is opposite to the coupling 19 in the respective seat 30.
  • the ring 37 is conveniently provided with a series of external radial pins 40; the ring and the groove 36 are coaxial to their respective seat 30.
  • the bottom 41 of the ring is configured, in its plane, in the shape of a fork, defining the radial slot 41 a which is sufficiently wide and long to allow the extraction of the casing 35 from the ring when the latter is moved eccentrically with respect to the former.
  • the ring 37 normally ensures the locking of the respective pumping chamber 31 and therefore of the respective casing 35 in the block 29; the ring, acting on the dome 35a, in fact locks the shoulder 35b of the casing 35 against a related shoulder of the seat 30, with gaskets 42 and 43 interposed.
  • the suction valve 44 and the delivery valve 45 of a pumping chamber 31 are substantially configured according to a common alignment which is perpendicular to the axis of the respective plunger 18: in practice this alignment is vertical and the two valves are respectively above and below the block 29 and are arranged in related small blocks 46 and 37 fixed to said block with screw elements 48. According to this alignment, the small blocks are traversed by a hole with a threaded outward portion for the coupling of a respective ring connection 40 and 50 which has actuation pins 51 and is then connected to the chamber 31 by a respective passage 52 and 53 which corresponds to a port of the casing 35.
  • Both valves comprise a shutter which is generally indicated at 54 and has a stem 54a and a terminal pointed expansion 54b which has a groove for the accommodation of a gasket 55 for sealing and shock-absorption against the seat 56.
  • Both valves also comprise a guide 57, with bushes 58 interposed, for the sliding of the shutter stem 54a; a sleeve 59 surrounds the guide and is connected thereto by means of spoke elements 60.
  • a retention spring 61 is interposed between the spokes 60 and the expansion 54b of the respective shutter.
  • the seat 56 which is outwardly conical, is provided in a recess of the ring-like connection 49; with reference to the valve 45, said seat is instead provided in a recess of the small block 47.
  • connection 49 and 50 lock an end shoulder of the respective sleeve 59 against a shoulder of the respective blocks 46 and 47, with a gasket 62 interposed.
  • the portion 63 of the delivery duct, leading out of the connection 50 and connected thereto with a screw coupling, is substantially flexible and has a wide radius of curvature; the various portions 63 then converge into a single duct.
  • Each connection 44 has a flanged inlet removably connected to a respective branching of the suction duct 64.
  • the adopted solution allows to achieve a cement-mixture circuit which has no deviations or tortuous paths; this yields an improved volumetric efficiency of the pump and a simplification of the delivery and suction valves; the problems of degradation of the pumped mixtures which occur due to sharp flow variations are avoided.
  • the rapidity of the replacement of said valves should also be noted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Mechanical Sealing (AREA)
EP88114447A 1987-11-23 1988-09-05 Suction and force plunger pump Expired EP0317716B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT370287 1987-11-23
IT8703702A IT1213730B (it) 1987-11-23 1987-11-23 Pompa idraulica a stantuffo tuffante aspirante-premente

Publications (3)

Publication Number Publication Date
EP0317716A2 EP0317716A2 (en) 1989-05-31
EP0317716A3 EP0317716A3 (en) 1989-08-09
EP0317716B1 true EP0317716B1 (en) 1991-11-27

Family

ID=11111453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114447A Expired EP0317716B1 (en) 1987-11-23 1988-09-05 Suction and force plunger pump

Country Status (4)

Country Link
EP (1) EP0317716B1 (it)
DE (1) DE3866519D1 (it)
ES (1) ES2027358T3 (it)
IT (1) IT1213730B (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106321398A (zh) * 2015-06-24 2017-01-11 韩文峰 一种用于输送含颗粒混合液的柱塞泵

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1230274B (it) * 1989-06-14 1991-10-18 Vitali Spa Gruppo di comando per presse utilizzate per l'estrazione del burro di cacao, dalla pasta di cacao.
DE4314132A1 (de) * 1993-05-02 1994-11-03 Friedrich Schwald Kolbenpumpe
GB2287758B (en) * 1994-03-19 1998-06-24 Hydrair Ltd Pumps for shear sensitive material
DE10125669B4 (de) * 2001-05-25 2006-04-27 Hammelmann Maschinenfabrik Gmbh Pumpe, insbesondere Plungerpumpe
US8105055B2 (en) 2009-06-18 2012-01-31 Fiac Tech Services, LLC Suction manifold mounting for a fluid end for a high-pressure pump
CN107990022A (zh) * 2017-12-08 2018-05-04 兰州理工大学 一种用于柱塞泵的配流阀

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2131749A (en) * 1936-06-29 1938-10-04 Homestead Valve Mfg Co Pump
US2655870A (en) * 1947-10-22 1953-10-20 Union Steam Pump Company Reciprocating pump for food materials
US3679332A (en) * 1970-04-10 1972-07-25 Union Pump Co Reciprocating piston pump
US3819303A (en) * 1973-06-13 1974-06-25 Ecodyne Corp Relief-release pumps
US4500267A (en) * 1981-10-08 1985-02-19 Birdwell J C Mud pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106321398A (zh) * 2015-06-24 2017-01-11 韩文峰 一种用于输送含颗粒混合液的柱塞泵

Also Published As

Publication number Publication date
DE3866519D1 (de) 1992-01-09
IT8703702A0 (it) 1987-11-23
IT1213730B (it) 1989-12-29
ES2027358T3 (es) 1992-06-01
EP0317716A3 (en) 1989-08-09
EP0317716A2 (en) 1989-05-31

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