Images

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
  • F04B9/109—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 having plural pumping chambers
  • F04B9/117—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 having plural pumping chambers the pumping members not being mechanically connected to each other
  • F04B9/1176—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 having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each piston in one direction being obtained by a single-acting piston liquid motor
  • F04B9/1178—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 having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each piston in one direction being obtained by a single-acting piston liquid motor the movement in the other direction being obtained by a hydraulic connection between the liquid motor 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
• • 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
  • F04B53/164—Stoffing boxes
• • 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
  • F04B7/02—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated
  • F04B7/0233—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated a common distribution member forming a single discharge distributor for a plurality of pumping chambers
  • F04B7/0241—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated a common distribution member forming a single discharge distributor for a plurality of pumping chambers 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

• ABSTRACT A reciprocating pump for concrete comprising a hollow body defining a concrete collection chamber with an inlet opening, concrete delivery pipes having a delivery opening communicating with said collection chamber, and pumping cylinders to pump concrete from a part of said collection chamber to said delivery pipes, and oscillating valve means to open and close v alternatingly said inlet and delivery openings.
• the present invention relates to or the like material.
• the general object of the present invention is to resolve in a technically efficient and economic manner the technical problems mentioned above.
• a particular object is to produce a pump capable of pumping with continuity concrete also containing inert material of considerable dimensions.
• Another particular object is to providevalve elements in the pump, having shape and trajectory of movement such to move away the inert materials of relatively large dimensions from the contact zone between the valve elements and their seats, or to crush such inert materials, in the case in 'whichthe removal of it has not occurred.
• Another particular object is to produce a pump which internal walls are easily openable and accessible for an easy and efficient washing of it in away to notably diminish-the operating cost ofthe pump, due precisely to washing operations and in a way to notably. increase the life of the pump, which is a consequence of the efficient washing of it.
• Another particular object is to produce a pump of simple and economic construction with a minimum number of component parts easily interchangeable, of long life, of efficient operation and of reduced production costs.
• a pump for concrete and like materials comprising a hollow body defining a concrete collection chamber, an inlet opening in said chamber for the introduction therein of the concrete, concrete delivery pipes having a delivery opening communicating with said collection chamber, and pumping cylinders suitable to pump the concrete contained in at least one part of said collection chamber towards said delivery pipes through said delivery opening and valve means suitable to open and close alternatingly said inlet and delivery openings, characterizedby the fact that said valve means comprise a shutter element, guide means for such shutter element defining a trajectory motion of said shutter element substantially extending in a tangential direction pumps for concrete BRIEF DESCRIPTION OF THE DRAWINGS
• FIG. 1 is a diagrammatic view in frontal elevation of the shown embodiment of The invention, partially in section, the sectional partbeing indicated with lines of greater
• FIG. 2 is a lateral view of the pump illustrated in FIG. lwith some parts omitted for the sake of clearness of the drawing and,
• FIGS. 3 and 4 show a detail in cross-section of the shutter element in two different operating positions.
• thepump essentially comprises a main hollow body 1 defining the concrete collection chamber la.
• the concrete is introduced into the collection chamber 1a through a hopper 2 (FIG. 2)
• the collection chamber 1a, as wellas the relative inlet opening 2a, are subdivided intotwo substantially symmetrical parts by a diaphragm or separation wall 2b. Upperly each. symmetric part of the collection chamber 1a, communicates withdelivery pipes 31, 31a through delivery openings 5a and 4a respectively. As best shown in FIG. 1 theinlet opening 2a is arranged adjacent and between the delivery openings 4a and 5a. The-delivery pipes both lead into a common delivery manifold 32.
• the valve 3 consists of two closure shutter elements having arcuated plate-like members 4 and 5, used to respectively open and close the delivery openings 40 and Saand the corresponding parts of the opening 2a. As shown in the left part of FIG. 1 the shutter members 4 and 5 have an operation edge extending in the closed position of the delivery openings,
• the shutter elements 4 and 5 are rigid with a support frame 3a revolvingly supported on a fulcrum 6 carried by the support plate 6a fixed on to the structure of the pump and which can be supported on the frame of a truck.
• the double-acting cylinder 7 transmits through an articulated joint an oscillating motion to the pivotal valve 3.
• two pumping cylinders 8 and 9 are joined in which plungers or pumping pistons for concrete 10 and 11 slide, and which are actuated through rods 12 and 13 by pistons 14 and 15 hydraulically actuated within the cylinders 16 and 17 As visible from FIG. 1.
• the pivoting point 6 of the valve 3 is arranged opposite to the pumping cylinders with respect to the collection chamber and between the delivery pipes.
• the hydraulic circuit which controls the cylinders 16 and 17 comprises a pump 18 which sends liquid under pressure to the distributor 19 from which ramify the pipes which carry the liquid under pressure, in a known way, towards the cylinders and 16 and the cylinder 7 controlling the valve 3.
• the distributor 19 which may be of any conventional type produces the operative cycle electrically'or pneumatically or hydraulically, being controlled by switch means (not shown in'the drawing) responsive to the position of the various plungers or pistons and which can be of any known type.
• switch means not shown in'the drawing
• a hydro-pneumatic accumulator is also inserted which serves to provide an adequate closure or operating velocity to the valve 3.
• the seal of the valve 3 is laterally improved by the presence of resilient membranes 20 and 21 visible in FIGS. 3 and 4 provided on the side of each of the'faces of the closure shutter elements 4 and 5.
• the membranes 20 and 21 externally close respective cavities 20a and 20b provided in the shutter elements and hydraulically communicating with the cylinder 23, whereof the piston 22 is moved through the piston 24 controlled by the distributor 19.
• the hydraulic communication between the cylinder 23 and the cavities 20a and 21a is schematically indicated at 23a in FIG. 1.
• the membranes 20 and 21 can expand when the valve 3 is stopped to increase the seal and contract when such a valve 3 is moving in ordernot to hamper such a motion.
• the contraction and expansion of these membranes is controlled by the position of the piston 24 controlled in turn from the distributer 19.
• the seal between the upperface of the closure elements 4 and 5 of the valve 3 and the fixed part of the valve body can .be produced also by means of membrane fixed on the above mentioned body which is controlled in the expansion and in the contraction by water delivered by the same plunger 22, thereby improving the seal.
• thetransversal dimension of the shutter elements 4-and 5 is slightly smaller than the internal width of the collection chamber and the delivery openings and the sealing means are provided substantially along the central line of the lateral walls of the members 4 and 5.
• the two cylinders 16 and 17 are connectedto each other-in a slave or servo-circuit by means of a pipe 25 which puts their upper chambers into communication.
• the lower chambers of the cylinders 8 and 9 are connected to each other by means of pipes 26, and the water reservoir 28 by means of a pipe 27.
• the group of cylinders 8, 9, 15 and 16 is removably connected for example by means of flanges 8a and 9a and relative screws to the body 1.
• the cylinders 8 and 9 each have a lug portion 290 rigidly fixed onto them, which is in turn hinged at 29 on to a lug portion 29b connected with the bodies 1 and to the pump support frame, not visible.
• the cylinders 8 and 9 are each arranged in alignment with one of the delivery pipes 31, 31a and converging to a common collector32.
• the tilting about the fulcrum 29 may also not be simultaneous for the two cylinders 8 and 9. It is'also possible to provide rotation means about an axis perpendicular to that of the fulcrum 29 allowing to tilt each cylinder towards the outside (not shown in the drawing) or about any other rotation axis more constructively convenient.
• the overturned cylinders can operate in thisposition as during the pumping therefore obtaining a rapid and secure washing of the cylinders and of the main body, which remains lowerly opened.
• the two delivery pipes 31 and 3la which ramify from the main body 1 lead by means of the collector 32 to the only delivery pipeline.
• the pump can be easily installed onto mobile cement mixer or trucks.
• the arrangement with any inclination of the cylinder axes with respect to the horizontal is also suitable either with an autonomous functioning or in connection with a cement mixer.
• the chamber la is continually filled from the'hopper 2 through the opening 2a, of which one of the two parts is always open:
• the piston 11 In the position illustrated inFIG. l the piston 11 has reached its lower end stroke after its lowering stroke during which it favored the ingressing of the concrete into the collectionchamber 1a through the left half of the opening 2a, left open by the valve 3, producing a sucking effect.
• the shutter element 5 maintains the right half of the opening 2a closed and while the piston 11 came down, the piston 10 goes up expelling the concrete from the right half of the collection chamber la into the delivery pipe 31, through the delivery opening 5a left open.
• valve 5 controlled by the cylinder 7 changes its position, with respect to that illustrated in FIG. 1, the shutter element 5 closing the delivery opening 5a and opening at the same time, the right part of the inlet opening 2a.
• the shutter element 4 opens the delivery opening 4a and closes the left of the inlet opening 2a.
• the arcuated and substantially cutting edge shaped shape allows the moving away of the ingredients with large dimensions or the crushing of them.
• a pump for concrete or the like material comprising inlet and delivery openings for the concrete, delivery pipes downstreams of said delivery openings, a collection chamber between said inlet and said delivery openings, two pumping cylinders each having a port opening inside said collection chamber and pumping pistons for pumping the concrete from said collection chamber through said delivery openings into said delivery pipes, pivotal valve means having shutter elements arranged to alternatingly open and close said inlet and delivery openings and actuation means for operating said valve means and said shutter elements,
• said inlet and delivery openings comprise an arcuated inlet opening arranged adjacent and between two of said delivery openings provided at the side of said collection chamber opposite to said pumping cylinders, 21 separation wall separating said collection chamber into two partial chambers arranged simmetrically with respect to said inlet opening, said shutter elements each having an arcuated substantially plate-like member movable tangentially to said inlet opening and substantially transversely to said delivery pipes, said plate-like members being arranged at a distance from one another substantially corresponding to the half of'thearcuated length of said arcuated inlet opening to alternatingly I open and close half of said arcuated inlet opening, and
• pivotal point of said pivotal valve means is arranged opposite to the pumping cylinders with respect to said collection chamber and between said delivery pipes.
• a pump according to claim 1 wherein said pumping cylinders are each arranged in alignment with one of said delivery pipes and converging to a common collector of said delivery pipes for the pumped concrete.
• tion sealin means are r vided subs ntiall alon the central lin of said latei ai walls of sa i c l arcu ated p%atelike members.
• a pump according to claim 1 wherein said pumping cylinders are hingedly arranged on said collection chamber adjacent said ports opening inside said collection chamber.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Reciprocating Pumps (AREA)
• On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=11271600

Family Applications (1)

Country Status (8)

Cited By (1)

Families Citing this family (1)

Citations (10)

Family Cites Families (2)

• 1970
  • 1970-12-14 US US98004A patent/US3704967A/en not_active Expired - Lifetime
  • 1970-12-18 ZA ZA708564A patent/ZA708564B/xx unknown
  • 1970-12-21 BE BE760663A patent/BE760663A/xx unknown
  • 1970-12-21 CA CA101,214A patent/CA943400A/en not_active Expired
  • 1970-12-21 FR FR7045971A patent/FR2071976B1/fr not_active Expired
  • 1970-12-21 DE DE2062940A patent/DE2062940C3/de not_active Expired
  • 1970-12-21 AU AU23601/70A patent/AU2360170A/en not_active Expired
  • 1970-12-21 ES ES387309A patent/ES387309A1/es not_active Expired

Patent Citations (10)

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