EP1718866A1 - Pompe a piston pour liquides epais - Google Patents

Pompe a piston pour liquides epais

Info

Publication number
EP1718866A1
EP1718866A1 EP05701189A EP05701189A EP1718866A1 EP 1718866 A1 EP1718866 A1 EP 1718866A1 EP 05701189 A EP05701189 A EP 05701189A EP 05701189 A EP05701189 A EP 05701189A EP 1718866 A1 EP1718866 A1 EP 1718866A1
Authority
EP
European Patent Office
Prior art keywords
delivery
control slide
phase
cylinder
thick matter
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.)
Withdrawn
Application number
EP05701189A
Other languages
German (de)
English (en)
Inventor
Manfred Lenhart
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
Publication of EP1718866A1 publication Critical patent/EP1718866A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • 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
    • F04B7/0042—Piston machines or pumps characterised by having positively-driven valving with specific kinematics of the distribution member
    • F04B7/0053—Piston machines or pumps characterised by having positively-driven valving with specific kinematics of the distribution member for reciprocating distribution members
    • 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
    • F04B7/008—Piston machines or pumps characterised by having positively-driven valving the distribution being realised by moving the cylinder itself, e.g. by sliding or swinging
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/11—Kind or type liquid, i.e. incompressible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/60—Fluid transfer
    • 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 present invention relates to a thick matter pump with the features of the preamble of claim 1. In a broader sense, it also relates to the control of such thick matter pumps.
  • Piston thick matter pumps have been used for a long time, in particular to convey concrete on construction sites. As a rule, they are designed as hydraulically operated piston pumps, usually two-cylinder, which convey the concrete through hoses or pipes. In the following, we will always speak of concrete conveyance in simplified form. However, the invention is not restricted to the use in concrete feed pumps, but can be used for all similar thick matter pumps.
  • Such pumps have to feed a single delivery line with two alternately filled cylinders and associated pistons.
  • Each filled cylinder is connected to the delivery line via a switchable pipe switch.
  • the piston then pushes the concrete out (pump stroke) while the parallel piston is moved back to refill the cylinder with concrete (suction stroke).
  • pump stroke the concrete out
  • suction stroke the direction of movement of the cylinder pistons is reversed and the pipe switch changed, so that pump and suction strokes alternate constantly.
  • the two pump pistons are preferably driven hydraulically and coupled to one another, so that they basically work in opposite directions.
  • Common pipe switches (DE 29 33 128 C2) are arranged in such a way that they can be moved back and forth between two switching end positions, in which they alternately produce the connection between the cylinder openings and the delivery line on the one hand and on the other hand the standard filling container. This results in discontinuous funding.
  • US 3,663,129 describes a concrete pump with continuous delivery, in which the changeover valve or its roller switch consists of a so-called rock slide valve. Its waist opening is an outlet downstream, but can be pivoted with the mouth of the Delivery line connected. Its kidney-shaped hem opening (inlet, upstream) is long enough to cover the openings of both feed cylinders at the same time.
  • the pipe switch executes a continuously oscillating swiveling movement, the axis of which is coaxial with the mouth of the delivery line.
  • the swivel angle of the pipe switch is approximately 50 ° on both sides of a central position.
  • the pistons of the feed cylinders are controlled in conjunction with the current position of the pipe switch so that at the moment the two cylinder openings are covered by the hem opening, one cylinder is just at the end and the other is at the beginning of a pumping stroke.
  • the funding moves smoothly from one cylinder to the other.
  • the same time period is used for the suction stroke and the pump stroke of each piston. There is consequently no simultaneous delivery of both cylinders.
  • the British patent 1,063,020 describes as a generic state-of-the-art a multi-cylinder thick matter and concrete pump, the change-over valve in one embodiment of which comprises two rotary slide valves, each of which can be controlled by its own lifting cylinder (also in the form of a rock slide valve).
  • the outlet openings are connected to a common downpipe, which in turn is connected downstream to the delivery line.
  • Each rotary valve can work with either a single or two pump cylinders.
  • a synchronized control of the rotary slide valve is addressed, but with this known pump, in addition to control, continuous delivery of the delivery cylinders into the common delivery line is neither intended nor possible.
  • DE 30 06 542 C2 describes a flat valve spool for two-cylinder thick matter pumps.
  • This comprises a slide flap which is firmly connected to a control rod and which can alternately be pushed back and forth between two end positions within a filling housing or frame.
  • This known 2/2-way slide valve can also be installed between the flanges of a downpipe and a supply or demand pipe. In concrete pumps, it is preferably installed between the bottom of a prefill container and the discharge pipes of a two-cylinder piston pump and / or the delivery line and the discharge pipes.
  • This insertion station includes, for example, a motor / hydraulically movable chamber slide with at least two chambers of the same cross section.
  • one chamber forms a section of the delivery line, while the other chamber is freely accessible.
  • the said cleaning body can be inserted manually from the outside.
  • the loading station is switched to a working position when the thick matter pump is shut down, in which the chamber containing the cleaning body now replaces the other chamber within the delivery line.
  • the cleaning body can then be pressed through the delivery line by means of compressed air, pushing the remaining thick matter in front of it.
  • these known insertion stations must be provided in addition to the changeover valve discussed above.
  • the invention is based on the object of specifying an improved thick matter pump and a method for controlling a thick matter pump with a continuous flow.
  • control slides are arranged essentially exposed in the thick matter collecting container, and with the design of the changeover valve with two translationally movable, in particular straight-line control slides, one can influence the influence of the thick matter, in particular of the concrete for the preferred application, much less exposed arrangement can be created.
  • the thick material is not deflected under pressure, as in the known rock slide valve, but is essentially only guided in a straight line through pipe sections.
  • the guide structure will preferably comprise a separate sliding guide for each control slide, so that larger mutual offsets of the control slide are possible during their operating cycles.
  • control slide can assume three different positions, namely a line position, a block position and an inlet position. These three positions correspond to a structure or a subdivision of the control slide into three different sections, namely a line section, a block section and an inlet section.
  • the names of the sections or positions speak for themselves and are discussed in connection with the description of the attached figures.
  • a very significant advantage of the solution according to the invention is the relatively easy to implement option of using at least one, if not both, control slides of the changeover valve as an insertion station (s) for cleaning bodies.
  • the short line sections of the control spool and the delivery line must be cleaned during the breaks in operation of the pump, ie residues of thick matter or concrete remaining in it must be removed.
  • the invention provides access to the control slides. This can e.g. B. by means of flaps that are normally closed, but allow access to the spool after opening.
  • the inlet position of the control slide is also used as an insert position for cleaning bodies. This is possible because in this inlet position the cross-section of the control spool has no function and is also depressurized.
  • Hydraulic actuating cylinders are preferably used as drives for the control slide.
  • other suitable actuators e.g. B. electric motors, rack drives etc. are used.
  • two successive (double-acting) lifting cylinders can be provided for each slide.
  • the stroke of each of the cylinders corresponds to the switching path of the associated control spool from one position to the next.
  • the spool is in its lowest position (e.g. intake position). If a cylinder is extended, the control slide moves to its central position (e.g. block position). If the second cylinder is now also fully extended, the control slide moves to its uppermost position (e.g. the line position).
  • the lifting cylinders could also be arranged at an angle to the control slides if a lever or deflection gear suitable for setting the respective control slide positions could be installed.
  • Figure 1 is a perspective view of the ensemble of the Dickstoff ⁇ umpe along with other func tion components.
  • Figure 2 is a side view in section of the Dickstoff ⁇ umpe with a multiple spool switch valve according to the invention.
  • 3 is a view of a section through the central axis of the delivery cylinder of the thick matter pump according to FIG. 2 (line II-II) to illustrate the arrangement of the delivery cylinder, the changeover valve and the collecting pipe;
  • Fig. 4 is a 90 ° front view compared to Figure 2 (section along line III-III in Fig. 1) of the changeover valve with two parallel spools.
  • FIG. 5 shows a path-time diagram of the phase-shifted strokes of both pistons of the thick matter pump over the respectively assigned positions of the two control slides; 6 shows a first drive variant for a control slide, which comprises two hydraulic lifting cylinders in tandem arrangement; 7 shows a second drive variant for a control slide which comprises a telescopic cylinder which can be extended in two stages, and FIG. 8 shows a third drive variant for a control slide which comprises a single long-stroke lifting cylinder.
  • Fig. 1 shows a perspective outline of a Dickstoff ⁇ umpe 1 with two parallel adjacent delivery cylinders 3 and 5, a prefill 7, a switch valve 9, a collecting or downpipe 19 and a short section of a delivery line.
  • the changeover valve is arranged in a housing or a filling structure 11 which penetrates the bottom of the pre-fill container 7.
  • a maintenance flap 13 is provided near the bottom of the guide structure on the side facing the conveying cylinders 3 and 5.
  • two control slides 15 and 17 are shown in the manner of an exploded drawing, which are provided for movable insertion into the housing-like guide structure 11 of the changeover valve 9 and form its valve body. This is discussed in more detail below.
  • Fig. 2 shows of the Dickstoff ⁇ umpe 1 only in this view of the lying delivery cylinder 3 in the region of its open (discharge) end.
  • the associated piston is not shown.
  • the second feed cylinder 5 is hidden behind the feed cylinder 3 in the direction of view. It is visible again from above in FIG. 3.
  • Both pistons of the delivery cylinders 3 and 5 are driven independently of one another (preferably hydraulically) and can basically have any relative positions and - within the scope of their strokes and their control. take speeds. However, it is also possible to operate them hydraulically coupled. Both cylinders and pistons have the same diameter, e.g. B. 250 mm.
  • both feed cylinders 3 and 5 the funnel-shaped Norglallb container 7 is flanged open, of which only a lower part (bottom part) is visible here.
  • the thick matter to be conveyed by the thick matter pump is poured into this from above.
  • the openings of both delivery cylinders 3 and 5 open out in the lower region of the standard filling container 7. As a result, when the thick matter is sucked into the feed cylinder, the greatest possible fill level of thick matter remains above the cylinder openings.
  • a switch valve In the bottom part of the standard filling container 7, a switch valve, generally designated 9, is arranged in a manner known per se. Thick matter enters the feed cylinders 3 and 5 only via this changeover valve 9, and only through this changeover valve do these feed cylinders eject the thick matter into the feed line (not shown here), as will be described in detail later.
  • the changeover valve 9 comprises an immovable contact structure 11 firmly connected to the standard filling container 7. It protrudes a little upwards into the standard filling container 7, but also penetrates the bottom thereof.
  • the guide structure 11 can in principle be designed as an open, in particular frame-like or frame-like scaffold. However, it is preferably built as an essentially closed box with a plurality of function-related openings, which, however, in particular in its upper region, which is located in the prefilling container, is kept so wide open that an undisturbed inflow of the thick matter also directly at the bottom of the prefilling container the changeover valves is guaranteed.
  • an open side z. B. to the winningzylinde ⁇ i be advantageous without endangering the exact guidance of the spool in this area. - lo ⁇
  • a flap 13 which is closed in the normal state is arranged in the lower region of the filling structure 11 outside the prefilling container 7. Opening the flap 13 gives access to the interior of the guide structure 11 which is box-like or housing-like in the illustrated embodiment.
  • the latter forms a straight guide for the two control slides 15 and 17 (the latter is visible in FIGS. 1, 3 and 4, but in FIG. 2, just as the feed cylinder 5 is covered).
  • These convey the connection between the delivery cylinders on the one hand and a manifold 19 and the delivery line connected to it on the other hand, which is not shown here.
  • the collecting pipe 19 and the beginning of the delivery line are advantageously at the same height as the axis of the delivery cylinders 3 and 5.
  • control spool 15 is described in greater detail below on the basis of FIG. 2.
  • the individual sections beginning with “15” are present in the same way on the control slide 17.
  • the control slide 15 can be positioned within the guide structure in three different predefined switching positions with respect to its length; this is done with the help of a drive system to be discussed later. It also includes three different functional sections. At the top is an inlet section 15E. This is open to the prefilling container 7 and to the delivery cylinder 3, that is to say it has an opening in the direction of its longitudinal axis and one transverse to it. A chute 15S, that is to say a spherically curved rim section, is used in the inlet section for deflecting the thick matter by 90 ° from the prefilling container into the delivery cylinder 3. Its free cross section preferably corresponds approximately to the cross section of the feed cylinder 3 and preferably forms an (deflection) angle of 90 °.
  • a correspondingly angled knee tube could also be provided in its place and integrated into the structure of the control slide.
  • This inlet section 15E comes into operation when the control slide 15 is positioned within the guide structure 11 in its lowermost position.
  • the section 15E is expediently closed on its surface side facing away from the conveying cylinder 3 in such a way that a sealing surface 15D is formed towards the collecting pipe 19. It is thereby achieved that in the emiass position of the control slide 15 there is no connection to the collecting pipe or that it remains closed with respect to the prefilling container 7. As will become clearer later, this enables a conveying operation of the other conveying cylinder during the refilling of one conveying cylinder in the manner of a continuous conveyance.
  • a blocking or block section 15B of the control slide 15 follows the emissive section 15E downwards. This only has the task of shutting off the connection between the feed cylinder and the collecting pipe 19 visible on the right of the changeover valve on both sides.
  • the block portion 15B is in front of the opening of the feed cylinder. After filling with thick matter, it can therefore travel a short pre-compression stroke in order to adapt the pressure in the freshly filled thick matter to the pressure in the delivery line connected to the collecting pipe.
  • the sealing surface 15D to the collecting pipe 19 in turn prevents a reaction to the pressure in the delivery line.
  • the block section which has no flow-guiding function, will be kept as short as possible in terms of construction, with the premise that it must make it possible to securely shut off the delivery cylinders even against a considerable pre-compression pressure.
  • An expansion of slightly more than 250 mm i.e. slightly larger than the diameter of the feed cylinder should be sufficient for this, assuming precise positioning.
  • lever section 15L in the control slide 15 which very preferably comprises a short, in particular straight pipe section which is open on both sides and has the same clear cross section as the delivery cylinder 3.
  • This coordination of the shape and size of the line section 15L can be seen well in FIG. 2 as in FIG. 3 (left). It is constantly filled with thick matter during operation of the changeover valve and the thick matter pump.
  • control slide each form a 3/3-way valve, with the inlet chutes, the openings of the delivery cylinders and the openings of the collecting tube as paths and with the three positions described above.
  • this scaffold has a grand crack of approximately 300 mm by 300 mm and is approximately 800 to 900 mm high.
  • a width of approximately 300 mm is predetermined by the diameter of the feed cylinder of 250 mm.
  • the height is determined by filling the control spool in three sections.
  • the depth (dimension seen in the longitudinal direction of the conveying cylinder), also given above as about 300 mm, can of course be adapted to the respective installation requirements; however, in order to offer the largest possible inlet cross section for the chutes, it should not be smaller than the cross section of the delivery cylinder itself.
  • FIG. 3 also shows some structural details of the structure of the filling structure 11, namely in turn side walls 11W and a central web UM. These form guide surfaces or rails for the control slides 15 and 17.
  • the design of the guide elements in detail is left to the expert selection of expedient materials and shapes that are as wear-resistant as possible. In this Sch ittansicht you can see even better the shape and the technical function of the manifold 19. It is carried out in a conventional manner as a trouser robe, the two legs of which each have a control slide 15 and 17 and its "collar" or output flange 20th directly connected to the delivery line, not shown here.
  • the free cross-section of the Hosem ear is smaller in the collar area than in the mouth area to the control spools.
  • FIG. 4 The compactness of the structure as a result of the control slider which can be directly adjoined can be seen particularly well in FIG. 4.
  • the control slides 15 and 17 positioned next to one another at different heights and the prefilling container 7, it is also made clear that the bottom of the the latter is penetrated by the management structure 11.
  • the bottom 11B is two thirds of the height of the spool under the bottom of the prefill container.
  • the walls 11W of the guide structure and its central web are visible here in full; they are about two thirds longer than the spool valves 15 and 17 themselves.
  • a bottom 1 IB of the guide structure is also shown closed here. However, it can make sense to perforate it and / or to provide it with a drain flap so that water penetrating through the gaps between the control spools and the filling level and the formation of movement-inhibiting air cushions when the control spool moves downwards is avoided.
  • the two feed cylinders 3 and 5 are concealed behind the guide structure 11 in the direction of view.
  • the control slide 15 is at the same height as in FIGS. 2 and 3, that is to say in its highest possible (line) position.
  • the control slide 17 is also 3 drawn in its inlet position, its lowest possible position within the guiding structure 11.
  • the line section 15L of the control slide 15 is currently positioned in front of the opening of the (concealed) delivery cylinder 3.
  • the latter is currently fluidly connected to the collecting pipe 19 and the delivery line so that it can eject filled and pre-compressed thick matter.
  • the inlet section 17E of the control slide 17 lies in front of the opening of the feed cylinder 5, so that the feed cylinder 5 is connected to the prefilling container 7 and can be refilled.
  • the glue section 17L of the control slide 17 lies in this lowest position at the level of the flap 13 indicated here by a dashed circle (cf. FIG. 1).
  • flaps 13 can be provided for each individual spool valve 15 and 17, but because of the close proximity of both spool valves in the firing structure, the flap 13 can also be a common maintenance and emptying flap for both spool valves 15 and could form 17. It would then of course have to be sufficiently wide to allow unimpeded intervention (in particular the insertion of cleaning bodies) in both control spools (or in their line separation). No pressure load will act on this flap (s) during normal operation, so that they do not have to be designed particularly effectively and also do not have to be sealed particularly well. However, as mentioned earlier, they should in any case be able to be securely locked against opening during the operation of the changeover valve 9.
  • the advantage can be taken into account that the respective inlet sections of the control slide bridges a height difference in the thick material inflow.
  • the thick matter flows from above to and under the influence of gravity further down, offset by the height of the inlet section (about 250 to 300 mm) laterally (after a deflection of 90 °) into the delivery cylinder.
  • the actual bottom of the preliminary container is therefore somewhat above the openings of the delivery cylinders 3 and 5. This basically makes advantage of the static pressure in the area of the cylinder openings in order to promote refilling or suction.
  • block position lies in the exact middle between the extreme positions of the control slide 15 and 17 shown in FIG. 3. It can either be set and fixed directly by the drives, or one can see additional mechanical interlocks or notches defined protection of the switch positions, as already mentioned above, but the latter are not shown here.
  • Fig. 4 drive variants already mentioned above are indicated in a highly schematic manner.
  • a tandem lifting cylinder arrangement 21 is provided on the control slide 15, a tandem lifting cylinder arrangement 21 is provided.
  • a first lifting cylinder 25 is placed on a fixed point 23, the actuator of which carries a further lifting cylinder 27.
  • the actuator of the latter is connected to the flat slide 15 via a console 29 which is only indicated.
  • an elongated opening is provided in the guide structure 11, in which the bracket 29 is slidably guided.
  • Both lifting cylinders have a double-acting design.
  • the lifting cylinder 27 must be equipped with movable feed lines.
  • Both actuators of the lifting cylinders 25 and 27 can be seen fully extended here.
  • the control slide 15 By moving back one of the actuators, the control slide 15 can first be brought into its central position (block position). If the second actuator is then also withdrawn, the control slide moves to its lower position (intake position). In the opposite direction of movement, the actuators are then moved out one after the other, the stroke lengths of the lifting cylinders 25 and 27 simultaneously determining the positions of the flat slide with suitable coordination.
  • the drive of the flat slide 17 is designed as a double-acting two-stage telescopic cylinder 31. It is arranged directly between a fixed point 33 and a console 35, only indicated, which in turn is fixed to the control slide 17 is connected. This can also be moved in the guide structure 11 via an elongated opening. Since the control slide 17 is in its lowest (inlet) position here, the lifting cylinder 31 is also fully retracted. By extending its actuator into a first stage or stroke position, it brings the control slide 17 into its block position, in a second stage by further extending the actuator, the control slide 17 reaches its line position.
  • a cleaning body 37 (also indicated by dashed lines in FIG. 2) can in any case be inserted into the line section 15L or 17L (previously emptied by hand).
  • the flap 13 After the flap 13 has been closed, it can be brought into the guide section by switching the control slide between the openings of the respective delivery cylinder or the collecting ear 19. Then he is z. B. with compressed air, which is supplied via a supply, not shown here, between the feed cylinder and the spool, through the manifold and the feed line to free these lines from the remaining thick matter.
  • both branches of the collecting or downpipe 19 By running a cleaning body through both branches of the collecting or downpipe 19, both of these are also cleared, with the thorough cleaning possibly being necessary the delivery line can be increased by double passage of a cleaning body (successively through both branches of the Sai nelrohrs and then through the common delivery line). It goes without saying that the same cleaning body 37 can be used twice in succession or different cleaning bodies can be used for both processes.
  • the two pistons of the delivery cylinders 3 and 5 are represented here only as reference symbols K3 and K5 at the beginning of the respective diagram line.
  • the movement sequence or cycle of the piston K3 is dashed, that of the piston K5 is drawn solid.
  • Said movement phases of the changeover valve are numbered from 1 to 8 and plotted side by side in the diagram over a time axis and divided from one another by vertical lines.
  • both control slides 15 and 17 are in their “pass-through position”, ie their line sections 15L and 17L are simultaneously in front of the openings of the delivery cylinders 3 and 5 (hereinafter also the starting position). Both delivery cylinders 3 and 5 are therefore simultaneously with the collecting pipe 19 and the adjoining delivery line. None of the delivery cylinders communicates with the prefilling container 7.
  • phase 1 of the diagram the piston K3 of the delivery cylinder 3 moves to the end of the pump stroke, while the piston K5 of the (freshly filled) cylinder 5 moves straight forward a pre-compression begins with his new pump stroke. Both pistons are displaced parallel and in the same direction at a relatively low speed. This can be referred to as a "constant phase”.
  • Phase 2 is a transition of the delivery cylinder 3 between the pump stroke and the suction stroke.
  • the control slide 15 has been shifted downwards — preferably after the piston K3 has stopped — by half of its total stroke, while the control slide 17 remains stationary.
  • the opening of the feed cylinder 3 is tightly closed by the block section 15B, its piston K3 rests briefly before its direction of travel changes (“transition phase”).
  • the feed cylinder 3 is completely closed off from the collecting tube 19. This intermediate or block position of the control slide 15 certainly avoids any fluidic short circuit between one pumping and the other suction suction cylinder.
  • control slide 15 can move; if necessary, it can be stopped briefly if the block section 15B is, as already mentioned, very short.
  • Phase 3 shows the first extreme relative position of both spools.
  • Control spool 15 has now been moved down by its total stroke (e.g. by a little more than 500 mm in total). He is now in his inlet position; its Schun-e 15S lies in front of the opening of the delivery cylinder 3.
  • the control slide 17 is still in its "line position", which still allows a delivery line from the delivery cylinder 5 into the delivery line.
  • the diagram shows in phase 3 that the piston K5 continues to run at full speed or at full pump power, while the piston K3 has a suction stroke, preferably with a gentle start and stop, but overall at a higher speed than in the pumping stroke (“suction phase”).
  • suction phase As a result of the regularly occurring (weight) pressure of the thick matter in the prefilling container and its flow-favorable guidance on the chute 15S, the delivery cylinder becomes 3 optimally filled.
  • phase 4 of FIG. 5 corresponds to phase 2.
  • the control slide 15 has now been raised from the inlet position again by the first half of its stroke.
  • the piston K3 of the delivery cylinder 3 (closed again by the block section 15B of the control slide 15) can pre-compress the thick material just sucked in at low speed over a very short stroke, preferably to the operating pressure prevailing in the delivery line ( "Pre-compression phase").
  • control slide 15 can also be briefly stopped or in any case braked here.
  • the K5 piston is in the final stages of its pumping stroke, still at full speed.
  • phase 5 corresponds exactly to phase 1 (starting position, “same phase”).
  • the diagram also shows in phase 5 that the pistons K3 and K5 with reversed rollers (based on phase 1) now have their phase-shifted play of start again with simultaneous pumping at a reduced speed. Now the movement cycle of the control slide 17 begins.
  • Phase 6 is a mirror image of phase 2; Now the piston K3 alone pumps at full speed, while the block section 17B of the control slide 17 pumps the delivery cylinder 5 closes tightly and its piston K5 rests according to diagram phase 6. The control slide 17 is shifted down by half of its total stroke.
  • Phase 7 corresponds to phase 3 as a mirror image. As already mentioned above, FIG. 4 also shows this phase.
  • the control slide 17 has its lowest position.
  • the feed cylinder 5 is refilled. Its piston K5 runs back to its starting position according to diagram phase 7, and thick material flows into the delivery cylinder 5 via the chute 17S.
  • the delivery cylinder 3 is at full pump capacity, its piston K5 at full feed speed,
  • phase 8 corresponding to phase 4, piston K5 pre-compresses the newly filled thick matter, while piston K3 enters the final phase of its pumping stroke.
  • piston K5 pre-compresses the newly filled thick matter, while piston K3 enters the final phase of its pumping stroke.
  • each of the pistons is in pumping mode and it then preferably runs at a constant speed.
  • the static pressure in which each The branch of the collecting tube 19 corresponds to the pressure in the delivery line. It is securely intercepted by the sealing surfaces 15D and 17D of the control spool in the block and / or inlet position.
  • the inventive design of the changeover valve and a targeted feed control of the delivery pistons make it possible to achieve a constant output of the thick matter pump in the phases of the common pumping strokes compared to the individual pumping capacity of a piston, and thus to practically eliminate the pulsation of the thick matter flow in the delivery line.
  • the weight of the thick material can advantageously support its rapid supply via the chute of the control slide to the cylinder opening to be fed.
  • the instantaneous positions of the pistons K3 and K5 and the control spool 15 and 17 can be recorded with suitable sensors (displacement transducers, position switches, diick sensors etc.), if necessary directly on the respective drives. These sensors feed their position signals to a preferably central control unit of the thick matter pump, which in turn controls the drives of the delivery pistons K3 and K5 and the changeover valve 9. In particular, it controls a reduction in their normal thrust speeds in the simultaneous conveying of both conveying cylinders. It is not absolutely necessary to control both pistons at half the speed, but one could in principle also use the one piston z. B. control to 1/3 of full speed and the other to 2/3 of full speed (provided the same diameter and total strokes). The goal remains a constant flow of the thick matter in the delivery line.
  • control unit has to stop the changeover valve temporarily or to switch to slow running, on the one hand, and to control the precompression stroke of the associated piston on the other hand.
  • This may require a pressure sensor, which can be arranged in the cylinder, in the piston, or also in the branch of the Sarnmelrolir 19 loaded with the drain.
  • a blocking of the control spool 15 and .17 by excessive pressure during the north compression can of course be safely excluded by pressure limiters or the like.
  • FIG. 6 once again goes into more detail on the control slide drive 21 with tandem lifting cylinders indicated on the left in FIG. 4.
  • the articulated fixed point 23 can again be seen (preferably on the housing of the changeover valve 9) and the two one above the other in series arranged lifting cylinders 25 and 27 and the console 29 to the spool, not shown here.
  • the lifting cylinders 25 and 27 are shown here schematically, so that three movement phases of this drive concept can be seen from right to left: on the far left both lifting cylinders are loaded on the rod side and are in their lowest position. Accordingly, the spool is in the intake position.
  • the lower lifting cylinder 25 is actuated on the piston side and is in its upper position, while the entrained upper lifting cylinder 27 is still actuated on the rod side (block position of the control slide).
  • the third phase shows both lifting cylinders in the fully extended position on the piston side (line position of the control spool). To lower the latter, the phases are run through in reverse order. With respect to the respective positions of the control bodies discussed in the previous figures, the three phases in FIGS. 6 to 8 are each identified by the letters E (inlet position), B (block position) and L (line position).
  • Fig. 7 shows the same process with a two-stage movable telescopic cylinder 31, as indicated in Fig. 3 on the right side.
  • the fixed point 33 which is connected in an articulated manner to the housing of the changeover valve 9, again carries this rod-side, via a bracket 35, to a lifting cylinder articulated on a control slide.
  • three working positions of the lifting cylinder 31 are provided, an additional stop or locking mechanism being provided for the middle position, so that this position can be approached in a defined manner.
  • a hydraulic locking of this middle position directly in the lifting cylinder 31 would also be feasible, but it may not be possible to set it precisely enough in hard continuous operation.
  • another small lifting cylinder 39 has been provided here, which is fixed to the housing of the U switching valve -ggf. is connected via a further fixed console and whose actuator can be moved into the stroke of the telescopic cylinder 31.
  • Fig. 7 one recognizes again from left to right, analogous to Fig. 6, three movement phases or positions E, B and L.
  • the telescopic cylinder On the far left, the telescopic cylinder is acted upon on the rod side and is in its lowest position.
  • the storage cylinder 39 is inserted.
  • the telescopic cylinder is half extended in the middle; its actuator runs against the actuator of the spenz cylinder 39, which has also been extended in the meantime, so that the intermediate position (block position) is reached here.
  • the locking cylinder 39 is retracted, so that the path for the actuator of the telescopic cylinder 31 in the uppermost, fully extended (stop) position is free. Accordingly, the control slide (not shown) articulated via the console is now in its uppermost (line) position L.
  • Fig. 8 shows an equivalent to Fig. 7, namely a two-stage controllable long-stroke individual lifting cylinder 41, which in turn is associated with a Spenzylinder 43.
  • Fixed point 33 and console 35 correspond to FIGS. 6 and 7.
  • the long-stroke lifting cylinder 41 is acted upon on the rod side in its lowest possible position E.
  • Spindle cylinder 43 is retracted.
  • the barrel cylinder 43 is also extended so that its actuator enters the path of the actuator of the lifting cylinder 41 and blocks it in the central position.
  • the barrel cylinder 43 is retracted again, and the actuator of the lifting cylinder 41 can be moved further into its uppermost possible position (L).
  • the spindle cylinders 39 and 43 are in any case to be coordinated with the respective lifting cylinders or actuators in such a way that the middle position can also be exactly adjusted during the downward stroke of the lifting cylinder.
  • the schematically simplified arrangements shown here serve only for a better understanding of the working principle of these drives, but can only reproduce the real installation conditions and the interaction between the lifting and spindle cylinders to a limited extent.

Landscapes

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

Abstract

L'invention concerne une pompe à liquides épais (1) à plusieurs cylindres, servant à acheminer notamment du béton. Cette pompe comprend au moins deux cylindres d'acheminement (3,5) qui acheminent le liquide épais à partir d'un réservoir de pré-remplissage (7) dans une conduite d'acheminement. Une soupape d'inversion (9) servant à accorder de manière alternée les cylindres d'acheminement à la conduite d'acheminement est associée à cette pompe. Selon l'invention, ladite soupape d'inversion (9) présente au moins deux tiroirs de commande (15, 17) pouvant effectuer sensiblement un mouvement de translation. Chaque tiroir de commande comprend une partie de conduite rectiligne (15L, 17L) destinée à raccorder le cylindre d'acheminement (3,5), qui lui est respectivement associé, à la conduite d'acheminement. Cette partie de conduite peut être raccordée à un collecteur (19) dans une position de conduite en aval du cylindre d'acheminement. L'invention concerne également un procédé pour faire fonctionner cette pompe à liquides épais en mode d'acheminement continu.
EP05701189A 2004-02-26 2005-01-26 Pompe a piston pour liquides epais Withdrawn EP1718866A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004009362A DE102004009362B4 (de) 2004-02-26 2004-02-26 Kolben-Dickstoffpumpe
PCT/EP2005/000747 WO2005085636A1 (fr) 2004-02-26 2005-01-26 Pompe a piston pour liquides epais

Publications (1)

Publication Number Publication Date
EP1718866A1 true EP1718866A1 (fr) 2006-11-08

Family

ID=34917055

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05701189A Withdrawn EP1718866A1 (fr) 2004-02-26 2005-01-26 Pompe a piston pour liquides epais

Country Status (11)

Country Link
US (1) US20080260560A1 (fr)
EP (1) EP1718866A1 (fr)
JP (1) JP2007524036A (fr)
KR (1) KR100816029B1 (fr)
CN (1) CN100439703C (fr)
AU (1) AU2005218110A1 (fr)
BR (1) BRPI0507892A (fr)
CA (1) CA2557152A1 (fr)
DE (1) DE102004009362B4 (fr)
RU (1) RU2353802C2 (fr)
WO (1) WO2005085636A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009005318B3 (de) * 2009-01-16 2010-09-30 Schwing, Friedrich, Dipl.-Ing. Verfahren zur Förderung breiiger Massen und Pumpvorrichtung zur Förderung breiiger Massen
CN102418693B (zh) * 2011-10-26 2014-10-15 三一重工股份有限公司 泵送机械、泵送系统及其分配阀及泵送系统的操作方法
CN102410204B (zh) * 2011-10-26 2014-04-16 三一汽车制造有限公司 泵送机械、泵送系统及其分配阀
DE102012107933B4 (de) * 2012-08-28 2017-09-21 Götz Hudelmaier Dickstoffpumpe zur Erzeugung eines kontinuierlichen Dickstoffstroms sowie Verfahren zum Betrieb einer Dickstoffpumpe zur Erzeugung eines kontinuierlichen Dickstoffstroms
DE102013104494B4 (de) 2013-05-02 2023-11-30 MPS-Matter Pumpsysteme GmbH Dickstoffpumpe
JP6529979B2 (ja) * 2013-10-29 2019-06-12 サームテック・ホールディングス・アーエス 管路における送出しにくい物質の供給及び送出のためのシステム
SG11201605837TA (en) * 2014-03-03 2016-08-30 Picosun Oy Protecting an interior of a gas container with an ald coating
US9686903B2 (en) * 2014-06-17 2017-06-27 Cnh Industrial Canada, Ltd. Optimizing product flow in a drop chute by controlling the shape and position of vortices present in the system
CN109139044B (zh) * 2018-07-17 2019-11-26 山东科技大学 一种矿用输送混凝土双柱塞泵防脉冲系统
DE102018132309A1 (de) * 2018-12-14 2020-06-18 Schwing Gmbh Kolbenpumpe und Verfahren zum Betrieb einer Kolbenpumpe
WO2020120234A1 (fr) * 2018-12-14 2020-06-18 Schwing Gmbh Pompe à piston et procédé pour faire fonctionner une pompe à piston
DE102018132270A1 (de) * 2018-12-14 2020-06-18 Schwing Gmbh Kolbenpumpe und Verfahren zum Betrieb einer Kolbenpumpe

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT207757B (de) * 1958-06-24 1960-02-25 Truempy Ag H Pumpe zum Fördern von dickflüssigen Massen, insbesondere Beton
GB1063020A (en) * 1963-11-08 1967-03-22 Eugene Lee Sherrod Reciprocating pump for semi-iiquid materials
US3663129A (en) * 1970-09-18 1972-05-16 Leon A Antosh Concrete pump
US3963385A (en) * 1975-05-05 1976-06-15 Caban Angel M Valve assembly for concrete pumps
DE7715442U1 (de) * 1977-05-14 1977-09-08 Kuhlmann, Herbert, 4690 Herne Steuerschieber fuer einzylinder- und zweizylinder-kolben-pumpen zum foerdern von beton
DE2933128C2 (de) * 1979-08-16 1985-09-26 Friedrich Wilh. Schwing Gmbh, 4690 Herne Dickstoffpumpe, insbesondere zur Förderung von Beton
DE3006542C2 (de) * 1980-02-21 1985-01-17 Friedrich Wilh. Schwing Gmbh, 4690 Herne Steuerschieber für Dickstoffpumpen
DE3525003A1 (de) * 1985-07-01 1987-01-08 Gerhard Dr Hudelmaier Verfahren und vorrichtung zum foerdern von beton aus einem behaelter in eine lieferleitung
NL8902546A (nl) * 1989-10-13 1991-05-01 Pieter Faber Betonpompinrichting.
CN2289072Y (zh) * 1996-08-19 1998-08-26 营口市路南开发区石油机械高技术开发公司 高粘度含砂原油混输耐磨蚀泵
IT1294068B1 (it) * 1997-01-17 1999-03-22 Gianguido Ravellini Dispositivo di pompaggio, in particolare per materiale cementizio.
DE19957337A1 (de) * 1999-11-29 2001-05-31 Hudelmaier Joerg Dickstoffpumpe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005085636A1 *

Also Published As

Publication number Publication date
CN1946937A (zh) 2007-04-11
CA2557152A1 (fr) 2005-09-15
AU2005218110A1 (en) 2005-09-15
JP2007524036A (ja) 2007-08-23
US20080260560A1 (en) 2008-10-23
DE102004009362A1 (de) 2005-10-06
WO2005085636A1 (fr) 2005-09-15
RU2353802C2 (ru) 2009-04-27
RU2006132457A (ru) 2008-04-10
KR100816029B1 (ko) 2008-03-21
BRPI0507892A (pt) 2007-07-24
CN100439703C (zh) 2008-12-03
KR20070007792A (ko) 2007-01-16
DE102004009362B4 (de) 2008-01-24

Similar Documents

Publication Publication Date Title
EP1718866A1 (fr) Pompe a piston pour liquides epais
WO2005083267A1 (fr) Pompe a piston a liquides epais
EP0808422B1 (fr) Procede et dispositif de transfert de beton ou d'autres liquides epais
DE2238080A1 (de) Betonpumpe
DE3112434A1 (de) Druckluftgetriebene doppelmembran-pumpe
DE2454290A1 (de) Betonpumpe
DE10343802B4 (de) Kolben-Dickstoffpumpe mit kontinuierlichem Förderstrom
EP3282124B1 (fr) Pompe a liquides epais
EP0364823B1 (fr) Dispositif pour distribuer pneumatiquement du béton débité hydromécaniquement dans une coulée épaisse
WO2006125606A1 (fr) Procede pour commander un dispositif de pompage pour le transport de masses pateuses et commande d'un dispositif de pompage pour le transport de masses pateuses
EP1003969B1 (fr) Pompe pour liquides epais a deux cylindres
DE3428629C2 (fr)
DE2909964C2 (fr)
DE3448016C2 (fr)
DE3525003A1 (de) Verfahren und vorrichtung zum foerdern von beton aus einem behaelter in eine lieferleitung
DE102011054616B3 (de) Hydraulisch angetriebene Anordnung zum linearen Bewegen eines Massekörpers
DE102012101120A1 (de) Hydraulisch angetriebene Anordnung zum linearen Bewegen eines Massekörpers
DE19710372C2 (de) Wasser-Hebevorrichtung für den untertägigen Bergbau
DE2721678A1 (de) Schlammpumpe
DE2421322A1 (de) Pumpvorrichtung zum verpumpen von beton oder anderem material
EP0485862B1 (fr) Pompe pour matière épaisse ayant un couple de cylindres aspirant et refoulant alternativement
WO2020260443A1 (fr) Pompe à liquide épais et procédé de circulation d'un liquide épais
DE102019109083A1 (de) Verfahren zur Steuerung einer Dickstoffpumpe und Dickstoffpumpe
WO2020083605A1 (fr) Pompe à piston à transport continu
WO2009060091A1 (fr) Transformateur de pression hydraulique et procédé d'utilisation

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20060802

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20071121

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20090620