EP0562498B1 - Pompe pour matières épaisses munie de cylindres refoulants, en particulier pompe à béton bi-cylindre - Google Patents

Pompe pour matières épaisses munie de cylindres refoulants, en particulier pompe à béton bi-cylindre Download PDF

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Publication number
EP0562498B1
EP0562498B1 EP93104594A EP93104594A EP0562498B1 EP 0562498 B1 EP0562498 B1 EP 0562498B1 EP 93104594 A EP93104594 A EP 93104594A EP 93104594 A EP93104594 A EP 93104594A EP 0562498 B1 EP0562498 B1 EP 0562498B1
Authority
EP
European Patent Office
Prior art keywords
pump
control slide
thick
slide valve
cross
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.)
Revoked
Application number
EP93104594A
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German (de)
English (en)
Other versions
EP0562498A1 (fr
Inventor
Friedrich Dipl.-Ing. Schwing
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.)
Friedrich Wilhelm Schwing GmbH
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Friedrich Wilhelm Schwing GmbH
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6454845&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0562498(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Friedrich Wilhelm Schwing GmbH filed Critical Friedrich Wilhelm Schwing GmbH
Publication of EP0562498A1 publication Critical patent/EP0562498A1/fr
Application granted granted Critical
Publication of EP0562498B1 publication Critical patent/EP0562498B1/fr
Anticipated expiration legal-status Critical
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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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/02—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having two 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
    • 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
    • F04B7/0026—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 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 thick matter pump with delivery cylinders, in particular a two-cylinder concrete pump according to the preamble of claim 1.
  • the thick matter pumps according to the invention suck the thick matter from a prefilling container and then press the sucked thick matter through the control slide into the delivery line.
  • the invention preferably relates to two-cylinder concrete pumps in which the delivery cylinders alternate with one another in such a way that each delivery stroke of one cylinder corresponds to a suction stroke of the other cylinder and the delivery and suction play of both cylinders overlap one another .
  • the invention does not rule out that the new thick matter pump has, in addition to the delivery cylinders, one or more so-called compensating cylinders which cooperate with the aforementioned delivery cylinders in a predetermined rhythm in order to bridge the delivery breaks.
  • Such thick matter pumps require that the inlet opening of the control slide on the wall of the prefilling container assigned to it seals the thick matter flow openings of the cylinders present in each case, in order to pressurize the thick matter in direct the delivery line; in this phase, on the other hand, the control slide must open the thick matter flow opening of the feed cylinder to the prefilling container, which is to be filled with thick matter from the prefilling container by suction for the following conveying stroke. In the case of two-cylinder thick matter pumps, this results in a reciprocating movement of the control slide between two end positions, in which the inlet opening moves along a segment of a circle on the wall of the prefilling container, at which the thick matter flows from the thick matter flow openings into the delivery line.
  • Two-cylinder thick matter pumps are known in which the feed cylinder openings are identical to the thick matter flow openings and therefore open directly on the wall of the prefilling container described.
  • the thick material flow openings are therefore circular.
  • the inlet opening of the control slide is also circular and corresponds not only with regard to this cross-sectional shape but also with regard to its area to the same thick matter flow openings. Due to the design-related distance between the delivery cylinders, a web is formed on the wall of the prefilling container between these openings, on which the inlet opening of the control slide seals during its circular segment-shaped path between the thick material flow openings. This web has the smallest possible width. This results from the requirement for a small center distance between the feed cylinders. This arises from the practical need for narrow-build thick matter pumps, which, among other things, serve as concrete pumps between the parallel main beams of a truck chassis are to be installed.
  • this known structure has other advantages.
  • the narrower the web the smaller the pivoting angle of the control spool.
  • the swivel path to be measured here is then short. This results in short switching times and comparatively little wear on the moving and fixed parts.
  • a disadvantage is that the inlet opening of the control slide on the narrow web is not completely covered and sealed. As a result, there is an open connection between the inlet opening of the control slide and the prefilling container during the movement of the control slide into its end positions. This causes a short circuit between the delivery line and the prefilling container, which leads to an uneven delivery of the thick matter through the delivery line and to a deterioration in the volumetric efficiency of the pump.
  • two-cylinder high-density pumps are known, from which the invention is based.
  • the feed cylinder openings open onto the wall of the prefilling container, so that the thick matter flow openings are circular, the inlet opening of the control slide also having the circular outline and the same area as the thick matter flow openings which are the same among themselves.
  • the control slide has slide plates on both sides of its inlet opening, which increase the area with which the control slide moves on the prefilling container wall. After reaching the At the end of a pump stroke, the control spool is switched from one end position to the other.
  • the aforementioned slide plates close the openings of both delivery cylinders, while on the other hand the inlet opening of the control slide seals on the surface between the outlet openings of the delivery cylinders. This prevents short circuits.
  • the thick material flows through spacer tubes in which they are deformed, it is possible that the thick material flow openings on the wall of the prefilling container deviate from the circular shape given by the feed cylinder. Since, according to the invention, these deviations consist in a shortening of the clear diameter of the thick material flow openings formed by the spacer tubes on the web, the web is narrowed, even with an essentially positive overlap, the Diameter reduction of the spool inlet opening is adapted to the web. This results in a shortened swivel movement with a shortened switching time.
  • the invention has the advantage that, with a substantially positive overlap, besides reducing wear and shortening the switching times, it also enables the center distance of the delivery cylinders to be reduced, which, among other things, also reduces the installation problems of mobile thick matter pumps.
  • Another embodiment of the invention which is the subject of claim 4, dispenses with parabolic cross-sectional shapes in favor of contours of the cross-section composed of essentially straight-line and rounded segments. This results in continuous outline shapes, which have an advantageous effect on the seal.
  • the positive coverage is determined from the cross-sectional shape of the openings and the width of the web if no additional measures are taken on the control slide. This is the subject of claim 5. While it has generally been assumed until now that the open short circuit due to the positive overlap is only avoided if the web ensures a complete support of the seal of the inlet opening by its dimensioning, the following applies at least to concrete that this is not necessary for practical reasons. In fact, an open short circuit is avoided even if residual gaps remain between the sealing surface of the inlet opening and the web edges, provided, however, that these residual gaps are not larger than what was stated in claim 6, for example. In this way it is possible to further reduce the swivel angle and the switching time without having to accept unpleasant short circuits.
  • Fig. 1 it is a two-cylinder piston pump for conveying concrete.
  • the two delivery cylinders 1, 2 have a piston 3 on a piston rod 4 as a displacer.
  • the cylinder 2 conveys the thick material previously sucked from a prefilling container 6 into the delivery line 7 through its outlet opening 22 according to the arrows entered.
  • the piston (not shown) in the cylinder 1 moves in the opposite direction and thereby sucks the concrete out of the prefilling container 6 at.
  • a control slide 11 determines the respective direction of the thick matter flow.
  • the control slide 11 is permanently connected with its outlet opening 8 to the pump-side end 9 on the delivery line 7 and is seated in a rotary tube connection 10 (FIG. 4).
  • the control slide is a generally S-shaped curved swivel tube 11 and has an inlet opening 12.
  • the inlet opening 12 is surrounded by a seal 14, which seals on the rear wall 15 of the prefilling container.
  • the thick material flow openings 16, 17 open, through which, depending on the conveying play, the thick material enters the absorbent cylinder 1 and exits the conveying cylinder 2.
  • the thick material flow openings 16 and 17 and the inlet opening 12 of the control slide 11 have the same contours and surface areas. This ensures an undisturbed flow of the thick matter.
  • the central axes 18, 19 of the delivery cylinders lie on a partial arc 20 around the pivot center 21 of the control slide 11, which is the center of the control slide outlet opening 8.
  • the distance between the delivery cylinder center axes 18 and 19 corresponds to the arc angle ⁇ .
  • the thick material flow openings 16 and 17 are connected to the feed cylinder openings 22, 23 assigned to them by a spacer tube 24, 25 each.
  • the control slide 11 can, as shown in the example of the spacer tube 25 in the lower illustration in FIG. 1, be aligned in one of its end positions with one of the thick material flow openings 16, 17 such that the inlet opening 12 of the control slide 11 with the relevant thick material flow opening 16 or 17 covered. The oscillating movement required for this takes place via the arc angle ⁇ .
  • the respective thick material flow is deflected by the shape of the spacer tubes 24, 25 diverging from the delivery cylinders 1, 2, so that there is a shift of points 18 and 19 to points 30 and 31.
  • the clear diameter is reduced so much that there is flattening 32, 33 of the outline 331, 321 of the thick material flow openings 16, 17 lying on the web. This reduction in diameter also lies on the web at the control slide inlet opening 12. As a result, the web edges essentially fall together with the flattenings 32, 33 and the respective flattenings of the control slide inlet opening 12.
  • control slide inlet opening is shown in broken lines at 35. It corresponds to an oval cross-section, the longer cross-sectional axis 36 of which lies on a radius R around the pivot center 21. The shorter axis intersects the pitch circle 20 as a secant and is therefore also on the web.
  • the size of the area of the web 29 between the thick material flow openings 16 and 17 of the spacer pipe sections 24, 25 with the cross section thereof is the same as the thick material flow openings 16 and 17.
  • the length of the spacer tube sections 24, 25 is dimensioned such that an optimization of the deformation resistance of the thick material from the circular cross-sectional shape 27, 28 of the feed cylinders 1, 2 occurs in the outline shape 331, 321 of the thick material flow openings 16, 17.
  • the area size of the thick material flow openings 16, 17 essentially corresponds to the area size of the feed cylinders 1, 2, which is not a requirement, however.
  • the outline shape of the openings 16, 17 and 12 is selected using the example of the opening 12 according to the dashed line 37.
  • the reduction in diameter on the web in turn leads to a reduction in the diameter, in the exemplary embodiment to a flattening of the outline, which is shown at 32 and 33.
  • These flattenings are essentially in the direction of a radius r around the pivot center 21.
  • the two flattenings 32, 33 are essentially connected by arches 38, 39 curved according to radii.
  • the size of the land area is reduced in such a way that in the central position of the control slide 11 there are gaps 40, 41 on the flattened areas, which produce a residual negative overlap.
  • gaps also occur in the embodiment according to FIG. 2, which is also designated 40 and 41 there.
  • These gaps are, however, chosen so that their maximum size is of the order of half the average grain size of the thick material.
  • control slide has widenings in the form of control slide plates 43, 44 on both sides of the opening. This makes it possible that in the drawn end position of the control slide 11, the plate 43 only clears the thick material flow opening 16 of the spacer tube 25 on the feed cylinder 2 when the inlet opening 12 covers the flow opening 17 of the spacer tube 24 on the feed cylinder 1.

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)
  • Details Of Reciprocating Pumps (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (9)

  1. Pompe pour produits épais, comportant des cylindres de transport (1, 2), en particulier pompe à béton à deux cylindres, qui présente, pour commander le débit de produit épais, un tiroir de commande (11) relié en permanence à l'extrémité côté pompe (9) d'une conduite de transport (7) et présentant au moins un orifice d'entrée (12), où il assure, sur l'entretoise (29) située entre les orifices (16, 17) de passage du produit épais, l'étanchéité depuis des cylindres de transport dans un récipient (6) de préremplissage, étant entendu que les orifices (16, 17) de passage du produit épais et l'orifice d'entrée (12) du tiroir de commande (11) présentent entre eux les mêmes contours et les mêmes superficies, et que le tiroir de commande (11), par un mouvement de pivotement, relie alternativement des orifices (16, 17) de passage voisins à la conduite de transport (7) et au récipient (6) de préremplissage,
    caractérisée en ce que les orifices (16, 17) de passage du produit épais sont chacun raccordés, par un tube d'écartement (24, 25) aux orifices associés (22, 23) de passage appartenat aux cylindres de transport, ces orifices correspondant aux premiers orifices, et les diamètres d'ouverture des orifices (16, 17) de passage du produit épais, formés par les tubes d'écartement (24, 25), sont réduits sur l'entretoise (29), la diminution du diamètre de l'orifice d'entrée (12) du tiroir de commande étant adaptée à l'entretoise (29) (figure 1).
  2. Pompe pour produits épais suivant la revendication 1, caractérisée en ce que la longueur des tubes d'écartement (24, 25) est dimensionnée de telle façon qu'il se produise une optimisation de la résistance à la déformation du produit épais, de la forme circulaire (27, 28) de section des cylindres de transport (1, 2) vers la forme de section (331, 321) des orifices (16, 17) de passage du produit épais des tubes d'écartement (24, 25).
  3. Pompe pour produits épais suivant la revendication 1 ou la revendication 2, caractérisée en ce que les sections des orifices (16, 17) de passage du produit épais correspondent à une section ovale (35), dont les grands axes de la section, situés sur un rayon (R), passent par le point central de pivotement (21) du tiroir de commande (11).
  4. Pompe pour produits épais suivant l'une des revendications 1 à 3, caractérisée en ce que les sections des orifices (16, 17) de passage sont constituées par la juxtaposition d'arcs de cercle (38, 39) et de parties applaties (40, 41).
  5. Pompe pour produits épais suivant l'une des revendications 1 à 4, caractérisée en ce qu'à la forme de section des orifices (16, 17) de passage du produit épais dérivée de la forme circulaire, succèdent, dans la position centrale du tiroir de commande, d'autres tranches (40, 41) dont la grandeur maximale de tranche correspond sensiblement à l'ordre de grandeur de la moitié de la granulométrie moyenne du produit épais à transporter.
  6. Pompe pour produits épais suivant l'une des revendications 1 à 5, caractérisée en ce que le joint d'étanchéité (14) entre l'orifice d'entrée (12) et la paroi (15) du récipient de préremplissage présente, des deux côtés, un élargissement tel que l'on obtienne un recouvrement essentiellement positif.
  7. Pompe pour produits épais suivant l'une des revendications 1 à 5, caractérisée en ce que l'élargissement du joint d'étanchéité (14) de la surface d'entrée du tiroir de commande est constitué par des plaques (43, 44) du tiroir de commande, qui s'appuient contre les bords de l'orifice d'entrée (12) et présentent des arêtes essentiellement parallèles (47, 48) les plus longues, comportant des courbures de rayons (r) par rapport au point central de pivotement (21) du tiroir de commande (11).
  8. Pompe pour produits épais suivant la revendication 7, caractérisée en ce que les arêtes parallèles (47, 48) des plaques (43, 44) suivent un tracé polygonal.
  9. Pompe pour produits épais suivant la revendication 7 ou la revendication 8, caractérisée en ce que les arêtes plus courtes (45, 46) des plaques (43, 44) du tiroir de commande viennent coïncider avec les zones applaties (32, 33) des contours des orifices (16, 17; 12).
EP93104594A 1992-03-24 1993-03-20 Pompe pour matières épaisses munie de cylindres refoulants, en particulier pompe à béton bi-cylindre Revoked EP0562498B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4209471 1992-03-24
DE4209471A DE4209471A1 (de) 1992-03-24 1992-03-24 Dickstoffpumpe für Förderzylindern, insbesondere Zweizylinderbetonpumpe

Publications (2)

Publication Number Publication Date
EP0562498A1 EP0562498A1 (fr) 1993-09-29
EP0562498B1 true EP0562498B1 (fr) 1996-01-03

Family

ID=6454845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93104594A Revoked EP0562498B1 (fr) 1992-03-24 1993-03-20 Pompe pour matières épaisses munie de cylindres refoulants, en particulier pompe à béton bi-cylindre

Country Status (11)

Country Link
US (1) US5380174A (fr)
EP (1) EP0562498B1 (fr)
JP (1) JPH0642453A (fr)
KR (1) KR100298499B1 (fr)
CN (1) CN1033289C (fr)
AT (1) ATE132580T1 (fr)
BR (1) BR9301287A (fr)
CA (1) CA2092397A1 (fr)
DE (2) DE4209471A1 (fr)
ES (1) ES2089617T3 (fr)
GR (1) GR3019136T3 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19724504A1 (de) * 1997-06-11 1998-12-17 Schwing Gmbh F Zweizylinderdickstoffpumpe
US6857861B2 (en) 2002-05-15 2005-02-22 Kennametal Inc. Ring for concrete pump
DE102004009363B4 (de) * 2004-02-26 2008-01-24 Schwing Gmbh Kolben-Dickstoffpumpe
DE102004015416A1 (de) * 2004-03-26 2005-10-13 Putzmeister Ag Vorrichtung und Verfahren zur Steuerung einer Dickstoffpumpe
GB2416569A (en) 2004-07-27 2006-02-01 Clarke Uk Ltd Method of and a pump for pumping drill cuttings
WO2007111689A2 (fr) * 2005-11-08 2007-10-04 Good Earth Tools, Inc. Bagues d'etancheite pour pompes a boue abrasive
CN100392247C (zh) * 2006-04-25 2008-06-04 甄继 可实现连续出料的混凝土泵送方法及混凝土泵送装置
CN101782054A (zh) * 2010-03-10 2010-07-21 北京中矿环保科技股份有限公司 一种膏体输送泵
US8827657B1 (en) * 2014-01-15 2014-09-09 Francis Wayne Priddy Concrete pump system and method
US9765768B2 (en) * 2014-01-15 2017-09-19 Francis Wayne Priddy Concrete pump system and method
CN103821688B (zh) * 2014-01-20 2016-04-06 三一汽车制造有限公司 一种泵送机构、泵送控制方法及混凝土泵送设备
US10001114B1 (en) * 2017-03-28 2018-06-19 Jessop Initiatives LLC Continuous flow pumping system
KR102633145B1 (ko) 2018-06-26 2024-02-05 쩌지앙 빔그린 파머슈티컬스, 엘티디 A2a 수용체 길항제로서의 트리아졸로 트리아진 유도체
CN110409833B (zh) * 2019-07-16 2021-04-02 江西鑫通机械制造有限公司 一种湿喷机的控制方法
CN117533791B (zh) * 2024-01-10 2024-04-30 中斯峰然建设有限公司 一种低能耗道路施工物料输送装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4120466A1 (de) * 1990-07-03 1992-01-09 Putzmeister Maschf Materialaufgabebehaelter fuer zweizylinder-dickstoffpumpen

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GB1214842A (en) * 1967-10-11 1970-12-02 Winget Ltd Reciprocating concrete pump
US3920357A (en) * 1974-03-13 1975-11-18 Case Co J I Pumping apparatus
GB1470597A (en) * 1974-08-21 1977-04-14 Sterling Winthrop Group Ltd Reciprocating pumps for dispensing pastes liquids and other substances
AR206931A1 (es) * 1974-08-24 1976-08-31 Schwing Gmbh F Bomba a pistones con cilindros multiples para el transporte de hormigon
DE2632816C2 (de) * 1976-07-21 1982-07-29 Friedrich Wilh. Schwing Gmbh, 4690 Herne Abdichtvorrichtung für eine Doppelzylinderpumpe, insbesondere für die Förderung von Beton
GB1585794A (en) * 1977-07-05 1981-03-11 Relf D Reciprocating pumps
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
US4343598A (en) * 1980-03-14 1982-08-10 Friedrich Wilh. Schwing Gmbh Viscous material pump, particularly for concrete
DE3304985A1 (de) * 1983-02-12 1984-08-23 Rudolf Ing. Riker (grad.), 8940 Memmingen Pumpeneinheit fuer schwerfliessende stoffe, etwa beton
DE3419832A1 (de) * 1984-05-26 1985-11-28 Karl Dipl.-Ing. 7000 Stuttgart Schlecht Rohrweiche einer dickstoff, insbesondere beton foerdernden doppelkolbenpumpe

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
DE4120466A1 (de) * 1990-07-03 1992-01-09 Putzmeister Maschf Materialaufgabebehaelter fuer zweizylinder-dickstoffpumpen

Also Published As

Publication number Publication date
CN1089691A (zh) 1994-07-20
GR3019136T3 (en) 1996-05-31
BR9301287A (pt) 1993-09-28
DE59301283D1 (de) 1996-02-15
US5380174A (en) 1995-01-10
KR930020016A (ko) 1993-10-19
KR100298499B1 (ko) 2002-02-19
ATE132580T1 (de) 1996-01-15
CN1033289C (zh) 1996-11-13
DE4209471A1 (de) 1993-09-30
CA2092397A1 (fr) 1993-09-25
JPH0642453A (ja) 1994-02-15
ES2089617T3 (es) 1996-10-01
EP0562498A1 (fr) 1993-09-29

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