EP2387667A1 - Verfahren zur förderung breiiger massen und pumpvorrichtung zur förderung breiiger massen - Google Patents
Verfahren zur förderung breiiger massen und pumpvorrichtung zur förderung breiiger massenInfo
- Publication number
- EP2387667A1 EP2387667A1 EP10704309A EP10704309A EP2387667A1 EP 2387667 A1 EP2387667 A1 EP 2387667A1 EP 10704309 A EP10704309 A EP 10704309A EP 10704309 A EP10704309 A EP 10704309A EP 2387667 A1 EP2387667 A1 EP 2387667A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slide
- piston
- inlet
- cylinder
- pressure
- 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.)
- Granted
Links
Classifications
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- 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
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- 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
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
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- 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
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
- F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
- F04B11/0058—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons with piston speed control
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- 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
- F04B15/023—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 supply of fluid to the pump by gravity through a hopper, e.g. without intake valve
-
- 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
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/20—Other positive-displacement pumps
- F04B19/22—Other positive-displacement pumps of reciprocating-piston type
-
- 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
- F04B23/00—Pumping installations or systems
- F04B23/02—Pumping installations or systems having reservoirs
- F04B23/025—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir
-
- 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
- F04B53/10—Valves; Arrangement of valves
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- 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
- F04B53/14—Pistons, piston-rods or piston-rod connections
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- 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
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- 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
-
- 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
- F04B7/0023—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 a rotating movement
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- 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
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- 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
- F04B7/0057—Mechanical driving means therefor, e.g. cams
- F04B7/0069—Mechanical driving means therefor, e.g. cams for a sliding member
Definitions
- the invention relates to a method for conveying mushy masses with a pumping device having a piston pump with at least two cylinders each having a piston, wherein each cylinder via an associated inlet opening with a Vorhell matterer and each cylinder via an associated outlet opening with a Support line is connected. Furthermore, the invention relates to a pumping device for pumping slurry with a piston pump with a cylinder having a piston and which is connected via an inlet opening which can be closed by an inlet slide, with a Vorhell disposer.
- the length of the delivery line brings with it that even the smallest interruptions in the flow of the mushy mass due to the inertia to significant pivoting movements lead the support line. Efforts are therefore being made to develop methods which permit continuous delivery of pulpy mass.
- This gap is filled, in which pulpy mass, which is already downstream of this gap, sags back. This is to the detriment of the uniform promotion of mushy mass in the conveying direction, so that can not be spoken of a real continuous promotion of pulpy mass.
- the pressure housing is very large, at a today's usual maximum concrete pressure of about 90 bar very difficult and only to clean with considerable installation effort.
- Particularly disadvantageous are the tight bends, the concrete must pass through the concrete standing in the pressure housing on the way in the delivery line during the pumping stroke on the suction swivel tube. Therefore, this pump can not promote very coarse concrete mixtures.
- Another disadvantage is that when switching to the other cylinder, the mouth of the pivot tube must find space between the two cylinder openings. This results in such a large center distance for the two delivery cylinders that the two cylinders can not, as required for a sufficiently low filling height of the prefilling container, be guided in an inclined manner between the spars of the carrier vehicle.
- DE 10 2005 008 938 B4 also has a total of 2 slides, which each act for both delivery cylinders.
- a gate valve is a 4-way gate valve with 2 switching positions that switches here at "zero pressure", eg the swivel pipe in the open pre-fill tank, which is common in discontinuous pumps, plus a gate valve in the delivery line, which always switches at constant pressure DE 10 2005 008 938 B4 compared to EP 1 003 969 B1, inter alia, that not only constant pressure or zero pressure prevails during the switching process, but that at least when switching with constant pressure gate valve, an automatic ring can be used, the hydrostatic contact pressure by the concrete pressure at constant pressure The reason for this is that after the compression process, the same pressure exists on the outside and inside of the cutting ring, and therefore, the contact surface of the cutting ring with its sliding partner, the swivel body, is subjected to the pressure of the gap, which is one of the cutting rings hydrostatic contact force against acting force of equal size exercises. For the contact pressure during
- the disadvantages of the type according to DE 10 2005 008 938 B4 are as follows:
- the two additional components required for the normal swivel tube are the gate valve, which has to be stored downstream about 1 m downstream of the swivel tube in the delivery line and which, for reasons of space, still further downstream Delivery line to be integrated equalizing cylinder.
- the compensating cylinder patented therein corresponds in terms of conveying action to two cylinders connected in parallel, whereby the piston stroke is halved compared with previously known compensating cylinders (see DE 42 081 54 A1, FIG.
- the driving hydraulic cylinder is not installed "in line” behind the delivery cylinder, but between the two, this compensation cylinder requires so much space that it is difficult to place on a truck-mounted concrete pump and sufficiently secure.
- this compensating cylinder is an expensive, complicated and very heavy assembly.
- the invention has for its object to propose a method for the continuous promotion mushy masses, which is adapted to allow even more uniform promotion of pulpy mass.
- a pumping device for conveying mushy masses to be proposed which allows a particularly good sealing of the inlet opening.
- the method is based on the basic idea to provide for each cylinder of the piston pump own inlet opening with its own inlet slide and its own outlet opening with its own outlet slide. This makes it possible to carry out the filling of the respective cylinder and the discharge of pulp in the delivery line through the respective cylinder independently of the operations of the other cylinder / cylinders.
- the method according to the invention provides that - During a suction stroke of a cylinder with the inlet opening and the closed outlet opening pulpy mass from the Vorchirll disposer is conveyed into the respective cylinder and in a pumping stroke of a cylinder with open outlet and closed inlet opening mushy mass is conveyed into the delivery line,
- the piston speed is greater during the suction stroke than during the pump stroke
- the inlet opening is closed with the inlet slide and then compression of the mushy mass in the cylinder takes place before the outlet opening is opened.
- This method makes it possible to switch the individual inlet and outlet valves under special favorable conditions.
- the inventive method makes it possible to close the respective inlet slide at a time at which the mushy mass drawn into the cylinder during the suction stroke has the same pressure as the mushy mass in the prefilling container. In the area of the prefilling container and the cylinder which has just been filled, this leads to a substantially pressure-free situation of the concrete, which is called "zero pressure" for reasons of simplification. Furthermore, the method according to the invention makes it possible to reopen the respective inlet slide only when the associated cylinder has started its suction stroke.
- the inventive method also makes it possible to close the outlet slide in a state in which the mushy mass in the cylinder and the mushy mass in the delivery line has the same pressure.
- This state in which the mushy mass in front of a slider and the pulpy mass after a slider has the same pressure, so the slide is thus in an environment of equal pressure, is called "equal pressure" for reasons of simplicity.
- the method according to the invention provides that prior to opening the outlet slide, compression of the pulpy mass drawn into a cylinder during the suction stroke takes place at the current delivery pressure, in which senen inlet slide and is compressed against the closed outlet slide of this cylinder.
- This situation of equal pressure also makes the use of an automatic ring provided on the valve body of the outlet slide or on the outlet opening of the outlet slide closed by the valve body particularly expedient in a preferred embodiment.
- the equal pressure situation creates a situation very similar to zero pressure.
- the contact surface between the automatic ring and the swivel body is also pressurized by the compression of the sucked-in concrete from the outside with pulpy mass (in particular cement paste, ie the fluid constituents of the concrete).
- pulpy mass in particular cement paste, ie the fluid constituents of the concrete.
- the method according to the invention allows the hydrostatic contact pressure of the automatic ring, which is required to prevent lifting at differential pressure, to be produced only at standstill after the switching operation and when pressure differences occur at the closed slide, both at the inlet slide and at the outlet slide.
- the method according to the invention makes it possible to use a pumping device which, compared to discontinuous pumps, can only be constructed with a slight additional expenditure through the two inlet slides, which would not be technically necessary for a discontinuous pump with two rotary valves.
- the two inlet slides provided in the prefilling container can be designed to be pivotable along the housing wall of the prefilling container.
- the pump device which can be used for the method according to the invention can be made compact, inexpensive and of a lightweight design.
- the overall length and the filling height at Vorhell capableer can be kept the same size compared to the conventional, discontinuous pumps with swivel tube.
- the wear on the slides can be kept extremely low by the prevailing during the switching zero pressure, or zero pressure similar ("equal pressure") situation despite the simultaneous Aufrecheriens the discharge pressure.
- the switching resistance of the slide and the required switching power and the required switching time can be kept low.
- the sliders which can be used in the method according to the invention can also have very low masses. This is because of the numerous switching operations, which must be done because of the very tight schedule in a very short time, particularly advantageous.
- a pumping device can be used in which the swivel tube known from EP 1 003 969 B1 can be dispensed with.
- an outlet slide is used, which is designed as a rotary valve.
- a rotary valve such slides are understood that can be rotated within a predetermined by the slide housing from a closed position to an open position without the valve body of the slider leaves the space defined by the slide housing.
- Alternatives to rotary valves are linear flat slide and so-called plunger with cylindrical shut-off elements, in which a valve body from a laterally arranged next to the space defined by the slide housing opening position is inserted linearly in the space defined by the slide housing to take its closed position.
- Rotary valves can be used particularly well to be moved neutral in volume from a closed position to an open position, ie without moving the valve body from the closed position to the open position, or back to the closed position, a gap, or an excess amount in the Valve body arises both upstream and downstream surrounding mushy mass.
- an outlet slide which is a rotary valve with a valve body in a slide housing, in which the slide housing is part of the pumping chamber, in which the mushy mass is conveyed by the respective cylinder in the delivery line and the valve body in all Positions of the outlet slide in the valve body remains.
- valve body of the outlet spool is moved from a closed position to an open position when the pressure of the mushy mass pressurized in the cylinder by compression corresponds substantially to the pressure of the mushy mass on the delivery line side of the outlet spool ,
- a constant pressure situation is achieved, which allows a particularly easy switching of the outlet slide with little wear.
- an inlet slide is used, which is designed as a pivot valve.
- the flat valve body of the slide is pivoted by a pivoting movement from an opening position located laterally next to the opening to be closed into a closing position closing the opening to be closed.
- Such pivoting flat slide can be made particularly simple.
- the method according to the invention makes it possible to open the inlet slide in a zero-pressure situation and thus makes it possible to use a swiveling slide valve which is simple to construct and which can be switched because of or after the pressure relief. Especially with high delivery resistances in the delivery line, the pivoting resistance would be virtually insurmountable and the wear extremely high.
- the method according to the invention can be operated in particular as follows:
- the inlet port is closed by pivoting the inlet gate to its closed position.
- the choice as to whether the closing of the inlet opening at the end, towards the end or shortly after the end of the suction stroke, is mainly due to the system.
- due to the switching times of the inlet gate it may be necessary to begin the pivotal movement of the inlet gate into the closed position before the piston has reached its fully retracted position in the cylinder.
- the inertia of a possibly provided switching hydraulics can lead to the inlet slide being closed only after end position sensors have recognized that the piston has reached its end position in the cylinder.
- the pumping piston After a short reserve time interval (for the actual pumping of pulpy mass), the pumping piston reaches near its end position. Now, the hydraulic control valve is preferably switched so that the oil flow in the hydraulic system controlling the valves can be temporarily split between the two cylinders. The effective flow rate in the concrete remains constant. After reaching the end position promotes only the following cylinder. In this way, complete continuity can be achieved.
- the piston is retracted in the cylinder, so that even in the cylinder and in the control housing located mushy mass is relaxed.
- the inlet gate is pivoted to its open position when the pressure of the mushy mass in the cylinder corresponds to the pressure of the pre-fill tank.
- the other cylinder is operated in opposite directions, wherein the steps 1 to 4 of the movement sequence of the one cylinder are carried out completely in the time in which the piston of the other pulp mass promotes pulp with the current delivery pressure in the delivery line.
- the piston speed during the suction stroke is to be selected to be greater than during the pumping stroke in order to keep the time to be provided for carrying out steps 1 to 4 low.
- This coordination of the individual steps to one another means that the pulpy mass is continuously pumped into the delivery line. As soon as the pumping stroke of one cylinder is completed, the other cylinder with precompressed mushy mass is ready to continue the promotion.
- An alternative embodiment of the method according to the invention for conveying mushy masses provides for the use of a pumping device having a piston pump with at least two cylinders, each having a piston, in which each cylinder via a closable with its associated inlet slide inlet opening with a Vorhell matterer and in which each cylinder is connected to a delivery line via an outlet opening which can be closed by means of an outlet valve assigned to it.
- a cleaning body is introduced into at least one of the cylinders, which is introduced by means of compressed air through the open outlet slide in the delivery line and promotes the present in the delivery line pulpy mass through the delivery line.
- the pumping device for pumping masses comprises a piston pump with a cylinder which has a piston and which is connected to a prefill container via an inlet opening delimited by an eyeglass plate which can be closed by an inlet slide, the inlet slide facing the cylinder interior Has closure surface, wherein
- the inlet slide has a pivotable basic body
- the closure surface is formed, at least in part, by the surface of a piston which is movable relative to the base body and which can dip into a closed cavity formed in the base body when a medium pressure acts on the piston from the inside of the control housing,
- a fluid is provided which can be compressed by the immersion of the piston
- This construction of an inlet slide makes it possible to provide a pivoting flat slide with a cutting ring (automatic ring), although the cutting ring is not flowed through by the medium flow as in EP 0 057 288 A1.
- a particular advantage of this pivot-flat slide is its very flat design, which allows an optimal effect of the agitator and the suction ports.
- the cutting ring is pressed only as a scraper with the freely selectable biasing force of a biasing spring against its associated sealing surface.Thus, the wear on such a cutting ring can be reduced because of Wear occurs almost exclusively during the switching process and depends on the surface pressure with about the 3rd power.
- the cutting ring Penetrating now when acted upon by the medium pressure pulpy mass between the cutting ring and its associated sealing surface, the cutting ring with the nip pressure of mushy mass, which is on average about 50% of the medium pressure, applied in the direction of the sealing surface away. Since the cutting ring but is pressed simultaneously over the fluid in the cavity with the pressure of pulpy mass against this sealing surface, the contact force outweighs in the direction against the spectacle plate. It is successfully prevented that the cutting ring is lifted from the sealing surface. The contact pressure is also increased by the additional existing bias, by the spring element. During the switching process, which takes place at the inlet slide at "zero pressure", the preload ensures the function of the cutting ring as a scraper.
- the spectacle plate is either integrally formed on the Vorphilll considereder or as a separate component.
- the term "spectacle plate” does not define any particular geometry, but merely designates the surfaces against which the automatic ring (cutting ring) is pressed in a sealing manner.
- the inlet slide on a biased spring element which acts in the same direction as the medium pressure on the piston. As a result, a bias is effected.
- the spring element is designed as a plate spring or is formed by a plurality of disc springs. Disc springs are particularly well suited for installation in the present invention designed inlet slider.
- the piston on its side facing the fluid on a substantially cylindrical stem which is slidably mounted in a cylindrical bore of the housing and together with the jacket of the piston forms a guide which secures the piston against tilting.
- the stem of the piston penetrates the body axially movable and sealed.
- the current state of the piston can be seen from the Vorglall suiter from. This gives an indication of the wear on the cutting ring and the spectacle plate, or on the correct amount of the introduced fluid.
- the spring element is supported on the cutting ring.
- the cutting ring is designed as an annular piston with a U-shaped ring cross-section, which is sealed with its outer inner diameter relative to the base body and with its inner inner diameter relative to the piston sliding.
- the hydrostatic force acting on the closed flat slide when subjected to pressure by the medium in the slide housing is partially absorbed by the tensile force of a pivot shaft supporting the inlet slide and partly by a force with which the body partially guided in a guide groove supported on the guide groove.
- the inlet slider is connected to a pivot shaft and the connection of the base body with the pivot shaft allows a slight oscillating movement about a substantially horizontal, perpendicular to the pivot axis extending axis.
- the spring element is tensioned by introducing the fluid into the cavity, wherein the piston moves against the effective direction of the medium pressure and the fluid space is secured by a check valve or a plug against leakage of the fluid.
- the inlet slide is a swiveling slide.
- the inlet slider has a spring element which presses a component of the inlet slider into the cavity in such a way that the fluid located in the cavity is precompressed.
- a pressure situation is created, which keeps components of the inlet slide in a first operating situation.
- a fat or an oil is used as the fluid. It has been found that a grease, or an oil is particularly suitable to be used in the operating environment of conveying mushy masses for the application of pressure to the cutting ring.
- the spring element is designed as a plate spring. It has been found that the use of a plate spring allows a particularly flat design of the inlet slide in the pump device according to the invention.
- the movable element which can exert a pressure exerted by the pulpy mass on the fluid in the body is forced into the cavity by the spring element, so that the fluid in the cavity is pre-compressed.
- the cavity is formed by a recess in the base body, which opens in the base body in the direction of the cylinder-facing side of the inlet slider and has a round opening with an opening diameter which is greater than the diameter of the inlet opening,
- the opening of the recess is closed by a cover and arranged between the outer periphery of the lid and the wall defining the opening opening cutting ring to form the cavity.
- This design makes it easy to assemble the inlet slider of the pump device according to the invention.
- the lid is movably formed relative to the base body and forms the movable element. This design makes it easy to run the inlet slide with a small number of components.
- the lid has a stop which abuts against a stop of the cutting ring when the lid is pressed by the fluid in the cavity to the outside.
- the lid is securely held in the inlet slide.
- the cutting ring is held by its abutment on the wall defining the opening, so that the lid can be supported by means of a stop on the cutting ring.
- the lid is fastened to the base body and has an opening in which the movable element, for example a piston, is movable is arranged relative to the lid.
- the movable element for example a piston
- this has at least two, in particular exactly two cylinders, each having a piston.
- Each cylinder of this preferred embodiment is connected to a prefill container via an inlet port closable with an inlet gate associated therewith.
- Each cylinder of this preferred embodiment is further connected to a delivery line via an outlet opening which can be closed by means of an outlet valve assigned to it.
- This embodiment offers, inter alia, the advantage of easy cleaning of the delivery line. In practice, the so-called purging of the delivery line to avoid the residual concrete, so when cleaning the delivery line, so-called chamber slide are used. These are now superfluous.
- the preferred embodiment of the pumping device according to the invention may in fact be designed so that the slide can be controlled individually, so that you suck for each cylinder from the Vorhell hereer a conventional sponge rubber ball and him in the provided as part of the delivery line downpipe and then extending further delivery line can contribute. These sponge rubber balls can then be blown out of the delivery line with compressed air to the front. This represents a significant simplification of the cleaning of such a pumping device.
- the inventive method is carried out with the pumping device according to the invention.
- the pumping device according to the invention and the method according to the invention are particularly preferred for conveying concrete and other thick matter such as e.g. Sewage sludge or overburden used in tunnel construction.
- FIG. 1 shows a sectional side view of a part of the pumping device according to the invention, in which the inlet slide, the outlet slide, the slide housing, a part of a cylinder, parts of the delivery line and parts of the prefilling container can be seen;
- Fig. 5 is a detail view of another embodiment of the inlet slider in a sectional side view.
- the pumping device shown in Fig. 1 for conveying mushy mass has a piston pump with two cylinders, of which in the illustration of FIG. 1, only one cylinder 1 of the piston pump is shown.
- the cylinder has a piston 2, which is here in its end position.
- the cylinder is connected to a prefill container 5 via an inlet opening 3, which can be closed by an inlet slide 4.
- the cylinder has an outlet opening 6, which can be closed with an outlet slide 7.
- the cylinder 1 is connected via the outlet opening 6 with a delivery line 8.
- the delivery line 8 is formed in its region adjacent to the piston pump as a so-called "bifurcated tube", ie as a branch pipe, which brings together the flow rates of the individual cylinders of the piston pump and merges into a (not shown) part of the delivery line, in which the individual partial flows of single cylinder of the piston pump can be promoted together.
- the inlet slide 4 of the pumping device is designed as a pivoting flat slide and can be pivoted about the pivot axis A from the illustrated closed position to an open position.
- the inlet slide 4 has an automatic ring 10 designed as a cutting ring, which surrounds the inlet opening 3 in the closed position of the inlet slide and is pressed at least with parts of an outwardly directed surface against a sealing surface of the body surrounding the inlet opening, in which the inlet opening is formed.
- the outlet slide shown in its open position is designed as a rotary valve.
- the valve body 30 of the outlet slide is arranged in a slide housing 31, wherein the slide housing 31 is the delivery chamber through which the pulpy mass is sucked from the respective cylinder from the Vorfeldll matterer and is conveyed in the pumping stroke in the delivery line.
- the valve body 30 remains in all positions of the outlet slide in the valve body and can thus be switched to volume neutral.
- an automatic ring 32 Surrounding the outlet opening 6 is an automatic ring 32.
- This automatic ring 32 can be designed in the manner of one of the cutting rings described in more detail in EP 0 057 288 A1 (where it is denoted by the reference numeral 14), wherein in EP 0 057 288 A1 the cutting ring is represented as part of the component to be pivoted (there of the switching element 3) while here the cutting ring is preferably formed as part of a stationary remaining part of the pumping device.
- the Cutting ring 32 are formed comparable to the arrangement of the cutting ring in EP 0 057 288 A1 as part of the valve body 30 to be pivoted.
- a stirrer 60 is provided. This can be formed so that it is effective even in the critical region of the suction due to the low height of the valve body formed as a pivot valve slide of the inlet slide 4.
- the embodiment of the inlet slide 4 shown in FIG. 2 shows that the inlet slide 4 can be formed with a flat basic body 11 which can be pivoted about the pivot axis A.
- the inlet slide 4 has a relative to the main body 11 movable element 13.
- This movable element 13 is formed in the embodiment shown in Fig. 2 as a piston
- the movable member 13 is in an outwardly facing surface 15 then in contact with mushy mass, when the Cylinder-facing side 16 of the inlet slide is in contact with mushy mass, which is located in the valve body 31.
- a pressure exerted by the mushy mass on the outwardly directed surface 15 of the movable element 13 can be exerted on a fluid located in the entire sealed cavity 12 and 12a.
- the piston 13 is secured against tilting by its guidance in the cover 17 and in the base body 11.
- the subspaces 12 and 12a are interconnected by a channel 44a.
- the entire cavity 12 and 12a is formed by recesses in the base body 11, which opens in the base body 11 in the direction of the side facing the cylinder 1 side 16 of the inlet slide 4 and has a round opening with an opening diameter D1 which is larger than that Diameter D2 of the inlet opening 3.
- the opening of the recess is closed by a cover 17 and the cutting ring 10 arranged between the outer periphery of the lid 17 and the wall 18 delimiting the opening.
- the cutting ring 10 which surrounds the inlet opening in the illustrated closed position of the inlet slide 4, is in the embodiment shown in Fig. 2 completely with its outwardly directed surface 19 against a surrounding the inlet opening 3 sealing surface 20 of the body, in which the inlet opening 3 is formed is pressed (the slide housing). With its inwardly directed surface 21 of the cutting ring 10 limits the cavity partially.
- a low-viscosity fat or a viscous oil is provided in the cavity 12 and 12 a.
- This can be introduced via an inlet opening, not shown, by means of a grease gun in the cavity.
- the cavity of the inlet slide 4 has a plate spring 22. This pushes the piston formed as a movable part 13 into the cavity, so that the fluid located in the cavity is precompressed. With the Vorkomprim iststik thus generated, the fluid in the cavity exerts pressure on the inwardly facing surface 21 of the cutting ring 10 and presses it with this pressure against the sealing surface 20.
- the plate spring 22 thus the contact pressure can be adjusted with the the cutting ring is pressed against the sealing surface 20 during the non-pressurized switching operations (at "zero pressure").
- the cement paste of the pulpy mass presses into the gap between the surface 19 and the sealing surface 20 as a hydrodynamic nip pressure, as described in detail in EP 0 057 288 A1.
- This nip pressure can not lift the cutting ring 10 from the sealing surface 20, because the average hydrodynamic nip pressure is only about 50% of the applied by the fluid pressure on the cutting ring hydrostatic contact pressure.
- the cutting ring is also pressed in accordance with the bias of the plate spring sealing on the sealing surface 20.
- the embodiment of the inlet slide 4 shown in FIG. 3 shows that the inlet slide 4 can be formed with a flat main body 41 which can be pivoted about the pivot axis (in the partial view of one half of the inlet slide (not shown in detail) in FIG
- the inlet slider 4 has a member 43 movable relative to the main body 41. This movable member
- the movable member 43 is formed in the embodiment shown in Fig. 3 as a lid.
- the movable member 43 defines with its external pressure gauge a cavity whose diameter corresponds to the inner diameter of the cutting ring 10.
- the bore 44 serves to guide the movable element without tipping.
- the movable element 43 is in contact with mushy mass with an outwardly directed surface 45 when the cylinder-facing side 46 of the inlet slide 4 is in contact with pulpy mass, which is located in the slide housing 31.
- a pressure which the mushy mass exerts on the outwardly directed surface 45 of the movable element 43 can be exerted on a fluid located in the cavity 42.
- the cavity 42 is formed by a recess in the main body 41, which opens in the base body 41 in the direction of the cylinder 1 facing side 46 of the inlet slide 4.
- the opening of the recess is closed by the movable piston 43 designed as a cover 47 and the cutting ring 40 arranged between the outer circumference of the cover 47 and the wall 48 delimiting the opening to form the cavity 42.
- the cutting ring 40 which surrounds the inlet opening in the illustrated closed position of the inlet slide 4 is completely in the embodiment shown in FIG. 3 with its outwardly directed surface 49 against a sealing surface 50 of the body surrounding the inlet opening 3 in which the inlet opening 3 is formed is pressed (the spectacle plate of the slide housing). With its inwardly directed surface 51 of the cutting ring 40 limits the cavity 42 partially.
- a low-viscosity fat or a viscous oil is provided in the cavity 42. This can be introduced into the cavity 42 via the inlet opening by means of a grease gun.
- the inlet slide 4 has one or more disc springs 52.
- the plate spring 52 thus the contact pressure can be adjusted with which the cutting ring is pressed during the switching operation against the sealing surface 50.
- FIG. 3 alternative design of an inlet slider 4 provides that the movable member, which exerts a pressure exerted by the mushy mass on it, on a befindliches in the cavity 42 of the body 41 fluid completely formed by the lid 47 becomes.
- the lid 47 is movably formed relative to the main body 41.
- the cover 47 has a stop 53 which abuts against a stop 54 of the cutting ring 40 when the cover is pressed by the fluid in the cavity to the outside.
- an operating situation is shown, in which the stop 53 is not applied to the stop 54, but at the opposite end of the travel. For operation, both end stops should be avoided. Therefore, more fluid must be filled in here (FIG. 3).
- FIG. 4 components that are the same as in the embodiment shown in FIG. 3 are shown with reference numerals increased by the number 100.
- the embodiment of Fig. 4 differs from the embodiment shown in Fig. 3 by the shape of the cutting ring 140 and the support of the spring element 152.
- the spring element is supported in this embodiment on the cutting ring and not - as in the embodiment of FIG. 3 - on a separate, firmly connected to the main body.
- the cutting ring 140 is formed as an annular piston with a U-shaped annular cross section, which is sealed with its outer inner diameter relative to the base body 141 and with its inner inner diameter relative to the piston 143 slidably.
- the piston 143 has on its side facing the fluid on a substantially cylindrical stem which is slidably mounted in a cylindrical bore of the housing and together with the jacket of the piston forms a guide which secures the piston against tilting.
- This stem of the piston penetrates the body axially movable and sealed.
- the design shown in Fig. 4 of the base body 141 and the cutting ring 140 is flattened outwards and thus allows a climbing of stones, if they could block the pivotal movement of the slider.
- FIG. 5 differs from the embodiment shown in FIG. 4 by the shape of the cutting ring 240 and in that the base body 241 engages around the cutting ring 240 on the outside.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL10704309T PL2387667T3 (pl) | 2009-01-16 | 2010-01-14 | Sposób tłoczenia papkowatych mas i urządzenie pompowe do tłoczenia papkowatych mas |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009005318A DE102009005318B3 (de) | 2009-01-16 | 2009-01-16 | Verfahren zur Förderung breiiger Massen und Pumpvorrichtung zur Förderung breiiger Massen |
PCT/EP2010/000161 WO2010081695A1 (de) | 2009-01-16 | 2010-01-14 | Verfahren zur förderung breiiger massen und pumpvorrichtung zur förderung breiiger massen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2387667A1 true EP2387667A1 (de) | 2011-11-23 |
EP2387667B1 EP2387667B1 (de) | 2013-03-20 |
Family
ID=42104743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10704309A Active EP2387667B1 (de) | 2009-01-16 | 2010-01-14 | Verfahren zur förderung breiiger massen und pumpvorrichtung zur förderung breiiger massen |
Country Status (13)
Country | Link |
---|---|
US (2) | US9046086B2 (de) |
EP (1) | EP2387667B1 (de) |
JP (1) | JP2012515294A (de) |
KR (1) | KR20110123243A (de) |
CN (1) | CN102282370A (de) |
CA (1) | CA2749386A1 (de) |
DE (1) | DE102009005318B3 (de) |
ES (1) | ES2414866T3 (de) |
MX (1) | MX2011007516A (de) |
PL (1) | PL2387667T3 (de) |
RU (1) | RU2477813C1 (de) |
WO (1) | WO2010081695A1 (de) |
ZA (1) | ZA201104288B (de) |
Cited By (1)
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---|---|---|---|---|
WO2020083605A1 (de) | 2018-10-23 | 2020-04-30 | Schwing Gmbh | Kontinuierlich fördernde kolbenpumpe |
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EP3483434B1 (de) * | 2014-10-13 | 2023-03-22 | Alfa S.r.l. | Verdrängerpumpe sowie pumpengruppe für flüssige produkte und verfahren zur verwendung davon |
EP3282124B1 (de) | 2016-08-11 | 2023-08-02 | Putzmeister Engineering GmbH | Dickstoffpumpe |
EP3282125A1 (de) | 2016-08-11 | 2018-02-14 | Putzmeister Engineering GmbH | Dickstoffventil |
CN107642471A (zh) * | 2017-11-09 | 2018-01-30 | 长沙紫宸科技开发有限公司 | 污泥泵泵体喂出料装置及其阀芯组件 |
US10900302B2 (en) | 2018-07-27 | 2021-01-26 | Country Landscapes & Tree Service, LLC | Directional drilling systems, apparatuses, and methods |
WO2020068667A1 (en) * | 2018-09-28 | 2020-04-02 | Julio Vasquez | System for monitoring concrete pumping systems |
US11891987B2 (en) | 2018-12-14 | 2024-02-06 | Schwing Gmbh | Piston pump and method for operating a piston pump |
DE102018132270A1 (de) | 2018-12-14 | 2020-06-18 | Schwing Gmbh | Kolbenpumpe und Verfahren zum Betrieb einer Kolbenpumpe |
DE102018132309A1 (de) | 2018-12-14 | 2020-06-18 | Schwing Gmbh | Kolbenpumpe und Verfahren zum Betrieb einer Kolbenpumpe |
DE102018132476A1 (de) | 2018-12-17 | 2020-06-18 | Schwing Gmbh | Absperrschieber |
DE102018132498A1 (de) | 2018-12-17 | 2020-06-18 | Schwing Gmbh | Absperrschieber |
CN109989900B (zh) * | 2019-05-24 | 2024-06-07 | 徐州徐工施维英机械有限公司 | 糊状物料输送装置及其控制方法和工程车辆 |
CN110043438A (zh) * | 2019-05-24 | 2019-07-23 | 徐州徐工施维英机械有限公司 | 糊状物料输送装置和工程车辆 |
CN112554567B (zh) * | 2020-11-26 | 2021-11-30 | 湖南工业职业技术学院 | 一种混凝土泵车底盘结构 |
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2009
- 2009-01-16 DE DE102009005318A patent/DE102009005318B3/de not_active Expired - Fee Related
-
2010
- 2010-01-14 KR KR1020117018832A patent/KR20110123243A/ko not_active Application Discontinuation
- 2010-01-14 ES ES10704309T patent/ES2414866T3/es active Active
- 2010-01-14 CN CN2010800044885A patent/CN102282370A/zh active Pending
- 2010-01-14 US US13/144,791 patent/US9046086B2/en not_active Expired - Fee Related
- 2010-01-14 MX MX2011007516A patent/MX2011007516A/es active IP Right Grant
- 2010-01-14 CA CA2749386A patent/CA2749386A1/en not_active Abandoned
- 2010-01-14 JP JP2011545679A patent/JP2012515294A/ja active Pending
- 2010-01-14 WO PCT/EP2010/000161 patent/WO2010081695A1/de active Application Filing
- 2010-01-14 RU RU2011134273/06A patent/RU2477813C1/ru not_active IP Right Cessation
- 2010-01-14 EP EP10704309A patent/EP2387667B1/de active Active
- 2010-01-14 PL PL10704309T patent/PL2387667T3/pl unknown
-
2011
- 2011-06-09 ZA ZA2011/04288A patent/ZA201104288B/en unknown
-
2015
- 2015-02-19 US US14/626,480 patent/US20160040659A1/en not_active Abandoned
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Cited By (1)
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---|---|---|---|---|
WO2020083605A1 (de) | 2018-10-23 | 2020-04-30 | Schwing Gmbh | Kontinuierlich fördernde kolbenpumpe |
Also Published As
Publication number | Publication date |
---|---|
US20110274572A1 (en) | 2011-11-10 |
DE102009005318B3 (de) | 2010-09-30 |
CA2749386A1 (en) | 2010-07-22 |
RU2011134273A (ru) | 2013-02-27 |
RU2477813C1 (ru) | 2013-03-20 |
ES2414866T3 (es) | 2013-07-23 |
KR20110123243A (ko) | 2011-11-14 |
WO2010081695A1 (de) | 2010-07-22 |
MX2011007516A (es) | 2011-09-09 |
CN102282370A (zh) | 2011-12-14 |
EP2387667B1 (de) | 2013-03-20 |
US9046086B2 (en) | 2015-06-02 |
ZA201104288B (en) | 2012-02-29 |
PL2387667T3 (pl) | 2013-08-30 |
JP2012515294A (ja) | 2012-07-05 |
US20160040659A1 (en) | 2016-02-11 |
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