EP0016410B1 - Pompe pour matières visqueuses, notamment pompe à béton - Google Patents
Pompe pour matières visqueuses, notamment pompe à béton Download PDFInfo
- 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
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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)
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)
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)
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 |
-
1979
- 1979-03-14 DE DE19792909964 patent/DE2909964A1/de active Granted
-
1980
- 1980-03-12 AT AT80101272T patent/ATE1513T1/de not_active IP Right Cessation
- 1980-03-12 EP EP80101272A patent/EP0016410B1/fr not_active Expired
- 1980-03-14 JP JP3173580A patent/JPS55160183A/ja active Granted
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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