EP0016410B1 - Pompe pour matières visqueuses, notamment pompe à béton - Google Patents

Pompe pour matières visqueuses, notamment pompe à béton Download PDF

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Publication number
EP0016410B1
EP0016410B1 EP80101272A EP80101272A EP0016410B1 EP 0016410 B1 EP0016410 B1 EP 0016410B1 EP 80101272 A EP80101272 A EP 80101272A EP 80101272 A EP80101272 A EP 80101272A EP 0016410 B1 EP0016410 B1 EP 0016410B1
Authority
EP
European Patent Office
Prior art keywords
delivery
cylinder
cylinders
swivelling
pump
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
EP80101272A
Other languages
German (de)
English (en)
Other versions
EP0016410A1 (fr
Inventor
Friedrich Dipl.-Ing. Schwing
Gerhard Dipl.-Kaufm. 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
Original Assignee
Friedrich Wilhelm Schwing GmbH
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 Friedrich Wilhelm Schwing GmbH filed Critical Friedrich Wilhelm Schwing GmbH
Priority to AT80101272T priority Critical patent/ATE1513T1/de
Publication of EP0016410A1 publication Critical patent/EP0016410A1/fr
Application granted granted Critical
Publication of EP0016410B1 publication Critical patent/EP0016410B1/fr
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
    • 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
    • F04B7/0034—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 orbital movement, e.g. elbow-pipe type members

Definitions

  • the invention relates to a thick matter pump, in particular a concrete pump, with a plurality of alternately operating delivery cylinders, each of which is assigned a three-way valve for flow control between the filling tank, delivery cylinder and delivery line, and with a connection circuit connecting the drives of the delivery cylinders and the three-way valves, which drive each Delivery cylinder switches between its intake and delivery stroke on a compression stroke, in which the drain in the delivery line is closed.
  • Such pumps are not only used to convey concrete through horizontal to vertical pipes, which can also be attached to placing booms, but can also be used to convey muddy to mushy masses. They are preferably suitable for a conveyed good that contains air or other gases.
  • the compression stroke of the pump compresses the material and thus the entrained gases before the material is pressed into the delivery line. This leads to an improvement in the volumetric efficiency of the pump and to an equalization of the delivery flow.
  • the closure of the delivery line during the switching process of the three-way valve and during the compression stroke ensures that material that has not already been compressed can flow back from the delivery line into the prefilling container during the switching of the three-way valves and thereby further improves the volumetric efficiency of the pump.
  • a thick matter pump according to the preamble of claim is known (DE-AS 2010112), in which a further three-way valve is provided in a connecting line between the suction paths of the delivery cylinders and the delivery line as a closure of the delivery line.
  • This three-way valve must therefore have its own drive for its valve body.
  • the pump control which in itself must be relatively complicated due to the compression strokes switched on in the movement of the delivery pistons, is further complicated.
  • the three-way valve provided for controlling the delivery line during the compression stroke is designed as a flap valve and is arranged in a branch of a downpipe that connects the delivery line to the delivery cylinders, this flap valve must inevitably displace conveyed goods, in particular compressed conveyed goods, in particular compressed conveyed goods, when switching over .
  • This is hardly possible in an overall filled and pressurized downpipe if the medium is coarse-grained, such as concrete.
  • a position is inevitably passed in which, in the case of coarse-grained conveying medium, neither of the two delivery pistons can work because the remaining cross sections between the flap and one side of the downpipe are not sufficient. Funding cannot be granted at this point in time. A pulsation-free funding is then not possible.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, solves the problem of avoiding a third three-way valve with an additional drive, which on the one hand prevents the medium from flowing back during the switching process and on the other hand closes the delivery line during the respective compression stroke.
  • Swivel tube valves are already known (DE-PS 12 85 319), which are used in two-cylinder piston pumps as four-way valves for flow control between the priming container, one of the delivery cylinders and the delivery line.
  • the swivel tube valves have the common disadvantage that they briefly cause a short circuit between the prefill container and the delivery line while the cylinder openings are being driven over, which must lead to a pressure drop in the delivery line, especially if there is already compressed material in the delivery line, as in the case of the pump according to the invention is provided.
  • a concrete pump (US Pat. No. 3,963,385) which has two master cylinders which alternately suck in conveyed material from a prefilling container and press it into a conveying line and has an auxiliary cylinder which presses conveyed material into the line between the strokes of the master cylinder and thereby the conveying flow in the latter maintains.
  • a four-way valve with a swivel tube is used, which carries a slide plate at its swinging end, which covers the openings of the master cylinder in the middle position of the swivel tube, in which only the auxiliary cylinder is connected to the delivery line.
  • the structural effort for such a pump is relatively large because of the auxiliary cylinder.
  • the auxiliary cylinder must be switched to suction during the pressure stroke of the master cylinder, as a result of which the delivery volume of the master cylinder is reduced. There is also no possibility of compressing the conveyed material before the pressure strokes of the master and auxiliary cylinders begin.
  • the advantages achieved by the invention consist in a substantial simplification of the thick matter pump, because in total only two three-way valves are required for flow control between the prefilling container, delivery cylinder and delivery line on the one hand and for the compression stroke on the other hand. So you can do a precise control of the compression strokes and eliminate the short circuit of the swivel tubes and thus meets the essential requirements Conditions for pulsation-free funding.
  • the arrangement can be made such that in the suction position of each multi-way slide valve, the slide plate lies between the feed cylinder opening and the inlet opening of the swivel tube.
  • the slide plate has a double function, because it prevents backflow of the conveyed medium during the switching process and acts as a closing element of the conveying cylinder during the compression stroke.
  • the arrangement is preferably such that the swivel tubes seal with their respective inlet openings in the suction position between the feed cylinders and the slide plates are attached to the sides of the swivel tubes which face away from one another.
  • the slide plates can be kidney-shaped.
  • An essentially rectangular valve housing 1 is located under a preferably funnel-shaped and optionally provided with a stirrer. In one of its longer walls 2 there are openings 3 and 4, behind which delivery cylinders 5 and 6 are flanged. A piston 7 or 8 runs on a piston rod 9 or 10 in each delivery cylinder.
  • a three-way valve is used to control the flow between the above-mentioned prefill container and one of each of the delivery cylinders 5 and 6 and a delivery line 11, the three-way valves being generally designated with 12 and 13, respectively.
  • These two three-way valves have a common housing, which is identical to the housing 1.
  • Each of the three-way valves 12 and 13 has a valve body which consists of a swivel tube 14 and 15, respectively.
  • the ends 16 and 17 are mounted in joints, which in turn are fastened to the housing wall 19, which runs in a plane parallel to the wall 2.
  • the swivel tube 14 seals with its opening 14a assigned to the cylinder 5 on the wall 2 in the region 21 between the openings 22 and 23 for the cylinders 5 and 6, respectively.
  • the opening 15a of the swivel tube 15 is aligned with the opening 23 of the cylinder 6.
  • the opening 15a (FIG. 5) of the swivel tube 15 can also be opened seal the area 21 of the valve housing wall 3 when the corresponding phase is switched.
  • slide plates 29 and 30 are fastened according to FIG.
  • the slide plates have a kidney-shaped basic plan, the longer curvatures 31 and 32 of which follow from the swivel radius, while the shorter curvatures 33 and 34 correspond to the curvature of the openings 22 and 23, respectively. This allows the slide plates 29, 30 to seal on the openings 22, 23.
  • the delivery stroke of the piston 8 has not yet ended, but the logic circuit has already ensured that the pivot tube 14 of the three-way valve 12 has brought the slide plate 29 onto its seat before the opening of the delivery cylinder 5, so that this opening is sealed.
  • the piston 7 runs according to the arrow in the conveying direction and carries out a compression stroke. out.
  • the delivery piston 7 has reached the end position of the compression stroke in the cylinder 5.
  • the position of the swivel tube 14 has remained unchanged and the piston 7 continues to convey from the cylinder 5 in the direction of the arrow pre-compressed material into the line 11.
  • the swivel tube 15 of the three-way valve 13 has overflowed the position in which the slide plate 30 connected to it seals on the opening of the delivery cylinder 6, and is now in the position in which its opening 15a seals on the valve housing wall 3, so that the backflow from the delivery line 11 is prevented. Even during this switching process, the medium could not flow back.
  • the opening of the cylinder 6 released in this position enables the connection to the prefilling container and thus the transition to the intake stroke of the piston 8 in the cylinder 6.
  • This phase is shown in FIG. 6, as the arrow in cylinder 6 shows.
  • the position of the various directional control valves is the same as in FIG. 5 and the piston 7 of the cylinder 5 continues its delivery path in accordance with the direction of the arrow.
  • the further processes then proceed analogously to those described, so that each cylinder first carries out a compression stroke and then carries out its delivery stroke.
  • S-shaped swivel tubes used according to the illustrated embodiment are not a prerequisite for realizing the invention. They can also be replaced by differently shaped, in particular known swivel tubes.
  • C-shaped, but also swivel pipes come into consideration, which have a vertical axis and in which pipe bends are installed between the cylinder end and the inlet opening in the prefilling container.
  • All or part of the swivel tubes can be immersed in the medium. It suffices to cover the outlet opening approximately up to the horizontal line shown in FIG. 7 with the pumped medium.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Claims (4)

1. Pompe à liquides chargés, notamment à béton, comportant plusieurs cylindres, fonctionnant en alternance, et à chacun desquels est affecté un distributeur (12, 13) à trois voies commandant l'écoulement entre le réservoir d'alimentation amont, le cylindre propulseur (5, 6) et la conduite d'acheminement (11), ainsi qu'un circuit combinatoire qui commande la marche des cylindres propulseurs (5, 6) et enchaîne le fonctionnement des distributeurs (12, 13), ledit circuit déclenchant, pour chaque cylindre propulseur (5, 6) une course de compression entre la phase d'aspiration et celle de refoulement, course de compression pendant laquelle l'écoulement vers la conduite d'acheminement (11) est obturé, pompe caractérisée en ce que les distributeurs à trois voies (12, 13) présentent, pour commander l'écoulement entre le réservoir d'alimentation amont, les cylindres propulseurs (5, 6) et la conduite d'alimentation (11), des tubes oscillants (5, 6), connus par eux-mêmes, à chacun desdits tubes étant fixée une plaque coulissante (29, 30) qui, dans sa position médiane, obture les orifices (22, 23) des cylindres propulseurs, tandis que, dans la position d'aspiration, les orifices d'entrée (14a, 15a) desdits tubes oscillants (14, 15) sont obturés par la paroi (3) de la boîte de distribution (1).
2. Pompe selon la revendication 1, caractérisée en ce que, dans la position d'aspiration de chacun des distributeurs à trois voies (12, 13), la plaque coulissante (29, 30) correspondante se trouve entre l'orifice (22, 23) du cylindre correspondant et l'orifice d'entrée (14a, 15a) du tube oscillant.
3. Pompe selon la revendication 1, caractérisée en ce que les tubes oscillants (14, 15) sont obturés de façon étanche entre les orifices des cylindres (22, 23) et que les plaques coulissantes sont disposées sur les côtés (27, 28) des tubes oscillants (14, 15) situés à l'opposé l'un de l'autre.
4. Pompe selon la revendication 1 ou 2, caractérisée en ce que les plaques coulissantes (29, 30) ont une forme de rein.
EP80101272A 1979-03-14 1980-03-12 Pompe pour matières visqueuses, notamment pompe à béton Expired EP0016410B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80101272T ATE1513T1 (de) 1979-03-14 1980-03-12 Dickstoffpumpe, insbesondere betonpumpe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2909964 1979-03-14
DE19792909964 DE2909964A1 (de) 1979-03-14 1979-03-14 Dickstoffpumpe, insbesondere fuer beton

Publications (2)

Publication Number Publication Date
EP0016410A1 EP0016410A1 (fr) 1980-10-01
EP0016410B1 true EP0016410B1 (fr) 1982-09-01

Family

ID=6065338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101272A Expired EP0016410B1 (fr) 1979-03-14 1980-03-12 Pompe pour matières visqueuses, notamment pompe à béton

Country Status (4)

Country Link
EP (1) EP0016410B1 (fr)
JP (1) JPS55160183A (fr)
AT (1) ATE1513T1 (fr)
DE (1) DE2909964A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60175780A (ja) * 1984-02-23 1985-09-09 Kyokuto Kaihatsu Kogyo Co Ltd コンクリ−トポンプにおける吸送部の切換装置
DE3512946A1 (de) * 1985-04-11 1986-10-16 Preussag Ag Metall, 3380 Goslar Vorrichtung zur foerderung von dickstoffsuspensionen und verfahren zu ihrem betrieb
DE3738359A1 (de) * 1987-11-12 1989-05-24 Putzmeister Maschf Dickstoff-pumpe
DE4208754A1 (de) * 1992-03-19 1993-09-23 Schwing Gmbh F Dickstoffpumpe mit foerderzylindern, insbesondere zweizylinderbetonpumpe
DE4209471A1 (de) * 1992-03-24 1993-09-30 Schwing Gmbh F Dickstoffpumpe für Förderzylindern, insbesondere Zweizylinderbetonpumpe
DE19735091B4 (de) 1997-08-13 2006-03-02 Schwing Gmbh Zweizylinder-Dickstoffpumpe
DE102006028329A1 (de) * 2006-06-20 2007-12-27 Schwing Gmbh Zweizylinder-Dickstoffpumpe mit zwei Rohrweichen
CN103216409A (zh) * 2013-03-25 2013-07-24 冀中能源峰峰集团有限公司 一种活塞式工业泵并联使用***及方法
CN103625928A (zh) * 2013-10-31 2014-03-12 冀中能源峰峰集团有限公司 一种膏体输送合流***及其合流方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1266130B (de) * 1963-11-08 1968-04-11 Eugene Lee Sherrod Mehrzylinderkolbenpumpe zum Foerdern von Beton od. dgl.
DE1453705A1 (de) * 1963-12-19 1969-09-18 Wennberg Olav Carl Gustav Kolbenpumpe fuer Beton oder andere Massen aehnlicher Konsistenz
GB1214842A (en) * 1967-10-11 1970-12-02 Winget Ltd Reciprocating concrete pump
US3682575A (en) * 1970-12-10 1972-08-08 Karl Guddal Concrete pump
US3963385A (en) * 1975-05-05 1976-06-15 Caban Angel M Valve assembly for concrete pumps

Also Published As

Publication number Publication date
ATE1513T1 (de) 1982-09-15
DE2909964A1 (de) 1980-09-25
JPS6329113B2 (fr) 1988-06-10
JPS55160183A (en) 1980-12-12
DE2909964C2 (fr) 1988-05-19
EP0016410A1 (fr) 1980-10-01

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