DE102018209202B4 - Fluid flow generator, conveyor and transport vehicle - Google Patents

Abstract

Fluid flow generator (108) for generating a fluid flow, the fluid flow generator (108) comprising the following: - one or more fluid cylinder devices (126), which each have at least one fluid space (128) and at least one fluid piston (130 ) comprise; - a drive device (110) for driving the at least one fluid piston (130) in the at least one fluid chamber (128), one or more of the fluid cylinder devices (126) each comprising at least two fluid chambers (128) which are arranged linearly one after the other , and wherein the fluid pistons (130) of these fluid chambers (128) arranged linearly one after the other can be driven by means of a common drive element (134) of the drive device (110), in particular by means of a common piston rod (136) of the drive device (110).

Description

The present invention relates to a fluid flow generator which can be used in particular as part of a conveyor device in a transport vehicle. For this, for example, on the DE 196 44 412 A1 , the DE 100 27 407 A1 , the U.S. 5,863,186 A , the DE 199 48 602 A1 , the EP 1 825 981 A2 and the US20150118072A1 pointed out.

A fluid flow generator is in particular a device for generating a gas flow, for example an air flow.

Fluid flow generators in general are known from the prior art, for example in the form of compressors.

The object of the present invention is to provide a fluid flow generator which can efficiently generate particularly large fluid volume flows.

According to the invention, this object is achieved by a fluid flow generator according to claim 1 .

The fluid flow generator according to the invention preferably comprises one or more fluid cylinder devices, which each comprise at least one fluid space and at least one fluid piston arranged movably in the respective fluid space.

Furthermore, the fluid flow generator preferably includes a drive device for driving the at least one fluid piston in the at least one fluid chamber.

In particular, it can be provided that one or more of the fluid cylinder devices each comprise at least two fluid chambers, which are arranged linearly one after the other. In this way, in particular, a particularly large overall fluid chamber can be provided from a number of partial fluid chambers and can be used to generate a fluid flow using a number of fluid pistons.

It can be favorable if the fluid spaces arranged linearly one after the other are connected to one another by means of one or more connecting elements.

The one or more connecting elements are in particular connecting flanges, which are used both for the mechanical connection of a wall surrounding the fluid spaces and for the fluid-effective separation of the two fluid spaces from one another.

It can be advantageous if each connecting element comprises a plurality of fluid openings, by means of which, in particular, fluid can be supplied to one of the fluid spaces and fluid can be removed from another of the fluid spaces at the same time.

The fluid is preferably not conducted from one fluid chamber to the next, but rather supplied to each of the fluid chambers as fresh fluid and discharged from the respective fluid chamber as part of the fluid flow to be generated.

In particular, the fluid openings in the one or more connecting elements do not establish a direct connection between the two fluid spaces.

Provision can be made for the fluid pistons to have a surface that bulges in the axial direction. In particular, a configuration of the fluid pistons that is convex on both sides in the axial direction is provided. End plates and/or connecting elements, which delimit the fluid spaces in the axial direction, are preferably of complementary design, for example concave. This configuration of the surfaces makes it possible in particular to optimize a low-turbulence flow within the fluid spaces.

The fluid chambers of each fluid cylinder device are preferably fluidly separated from one another with respect to an axial direction by means of a connecting element and are delimited at opposite ends by end plates.

Both the end plates and the one or more connecting elements are preferably provided with a plurality of fluid openings in each case in order to be able to supply fluid to each fluid chamber on both sides of the fluid piston movably arranged therein and/or to be able to discharge fluid from each of the fluid chambers on both sides of the fluid piston .

Furthermore, one or more supply openings can be provided, for example in one or more end plates and/or in one or more connecting elements, in order to supply coolant and/or lubricant to the fluid spaces and/or the relatively movable components of the fluid flow generator. Cooling by means of cooling coils and/or direct and/or indirect piston lubrication can also be provided.

As an alternative or in addition to this, one or more discharge openings can be provided be to remove fluid, such as condensed water, from the one or more fluid spaces.

Furthermore, as an alternative or in addition to this, provision can be made for one or more discharge openings to be provided with an overpressure valve, in particular with a safety valve.

In one embodiment of the invention, provision can be made for the fluid pistons to be drivable from fluid chambers arranged linearly one after the other by means of a common drive element of the drive device, in particular by means of a common drive element of the drive device, in particular by means of a common piston rod of the drive device.

In particular, the fluid pistons of these fluid chambers arranged linearly one after the other can be moved back and forth linearly along an axial direction by means of the common drive element.

Each fluid cylinder device is preferably assigned at least one hydraulic cylinder device of the drive device for driving the respective at least one fluid piston.

The drive device preferably comprises one or more hydraulic pumps, by means of which in particular the at least one hydraulic cylinder device can be operated.

It can be favorable if two or more than two hydraulic pumps are provided, which are operated in particular asynchronously and/or out of phase by, for example, approximately 90° with respect to one another in order in particular to maintain a continuous pressure and/or a continuous volume flow in a hydraulic system of the drive device.

It can be advantageous if each fluid cylinder device is assigned two hydraulic cylinder devices.

The hydraulic cylinder devices are preferably arranged at opposite ends of each fluid space or at opposite ends of a series of a plurality of fluid spaces arranged linearly one after the other.

A common drive element preferably extends, starting from a hydraulic cylinder device, through one or more fluid chambers to a further hydraulic cylinder device.

One or more fluid pistons are preferably fixed to the drive element in such a way that the one or more fluid pistons are moved linearly together with the drive element during a linear movement of the drive element.

By using two hydraulic cylinder devices at opposite ends of a common drive element, the one or more fluid pistons fixed to the drive element can be moved in the one or more fluid chambers, preferably with particularly high forces and/or high speeds.

It can be favorable if the fluid flow generator comprises a control device, by means of which several fluid cylinder devices and/or several drive devices are coupled to one another in such a way that the fluid pistons of different fluid cylinder devices reach their respective movement reversal points offset in time.

In particular, the control device is preferably used to control such that the maximum volume flows of the fluid cylinder devices are generated with a minimized pressure loss with a time offset relative to one another, and thus a total fluid flow resulting from the fluid flows of a plurality of fluid cylinder devices is at least approximately constant over time with regard to its pressure and/or its volume flow.

In particular, a (quasi) continuous generation of fluid flow is possible by means of a plurality of fluid cylinder devices.

It can be favorable if the control device and/or the drive device can be used to achieve a minimized switching frequency and/or switching duration when switching the direction of movement of the drive element, for example a switching duration of at most approximately 1000 ms, in particular at most approximately 250 ms, preferably at most approximately 100 ms .

The fluid flow generator according to the invention is particularly suitable for use as part of a conveying device.

The present invention therefore also relates to a conveying device which, in particular, comprises a fluid flow generator according to the invention.

The conveying device can, for example, convey a free-flowing or pourable materials are used. In the following, this material is simply referred to as "bulk material".

The conveying device is thus in particular a bulk material pump.

For example, the conveying device can be a gravel pump or a "concrete pump" for concrete that has not been conveyed with conventional methods up to now. In the case of concrete with a large proportion of air (lightweight concrete), it can happen in particular that the delivery pressure of conventional concrete pumps, which can be up to approximately 80 bar, for example, is too high to maintain the desired proportion of air in the concrete. The delivery device described here preferably avoids this problem in that a delivery pressure is at most approximately 10 bar, in particular at most approximately 7 bar, for example approximately 6.4 or 4.7 bar.

It can be advantageous if the conveying device comprises a transfer device, by means of which material to be conveyed on the one hand and a fluid flow generated by the fluid flow generator for driving the material to be conveyed on the other hand can be combined and conveyed further as a common conveying flow.

For example, it can be provided that the conveying device comprises a turret device as the transfer device.

The turret device preferably comprises a plurality of rotor segments arranged in a ring shape and rotatable about an axis of rotation, which can be filled with the material to be conveyed at a position about the axis of rotation. By rotating the rotor segments about the axis of rotation, they can be successively filled with material to be conveyed and fed to a discharge area, in which a fluid flow generated by the fluid flow generator is fed to the material to be conveyed and discharged from the respective rotor segment together with the material to be conveyed.

The rotor segments are in particular shafts for receiving material to be conveyed.

It can be favorable if the conveying device comprises a transfer device for bringing together the material to be conveyed on the one hand and a fluid flow generated by the fluid flow generator for driving the material on the other hand, with a fluid guide of the conveying device preferably being provided in such a way that a first partial flow of the fluid flow passes through a discharge area the transfer device and can be fed to the material to be conveyed and that a second partial flow of the fluid flow can be fed downstream of the discharge area to the material mixed with the first partial flow and already conveyed out of the discharge area.

The first partial flow of the fluid flow forms in particular a main flow for entraining the material to be conveyed. The second partial flow of the fluid flow is provided in particular as a fluid injection to optimize fluidization of the material to be conveyed.

For example, the supply of the second partial flow of the fluid flow can be arranged at a deflection point arranged downstream and/or below the discharge area with respect to the direction of gravity.

The conveying device is, in particular, a bulk material pump, by means of which, in particular, pourable and/or free-flowing material can be conveyed using pressurized fluid in the form of compressed air.

Alternatively or additionally, it can be provided that the delivery device is a suction pump or can serve as such.

The present invention thus relates in particular to a bulk material pump and/or a suction pump which includes a fluid flow generator according to the invention.

In the case of a suction pump, a suction fluid flow can be generated by means of the fluid flow generator, while in the case of a bulk goods pump, a pressure fluid flow can be generated by means of the fluid flow generator.

In particular when the fluid flow generator is used as part of a suction pump, it can be provided that the conveying device comprises a separating device which is arranged in particular upstream of the fluid flow generator.

The separating device is in particular a centrifugal separator, cyclone separator and/or another filter device for separating material to be conveyed from the suction fluid flow.

The suction fluid flow is in particular that air flow which is sucked in via a conveying line of the conveying device from the environment together with the material to be conveyed, with a negative pressure preferably being generated for this sucking in by means of the fluid flow generator. In particular, it is possible to take up material by suction at one end, for example an end hose, of a placing boom.

The fluid flow generator according to the present invention can also be used in other ways, for example, when large volume flows, in particular air volume flows, have to be provided efficiently.

For example, a fluid flow generator according to the invention can be used in sewage treatment plants for tank aeration. In this way, in particular, a mechanical stirring device can be omitted or at least operated more rarely or more efficiently.

The fluid flow generator according to the invention can be, for example, a stationary device. Furthermore, the fluid flow generator can be mobile.

It can be advantageous if the conveying device according to the invention, in particular a bulk material pump and/or a suction pump together with the associated conveying lines, is designed to be stationary or mobile.

For example, a mobile design can be provided by attachment to or on a trailer or on or on a transport vehicle.

The present invention therefore also relates to a transport vehicle, in particular a truck, which comprises a fluid flow generator according to the invention and/or a conveying device according to the invention, for example a bulk material pump and/or a suction pump, optionally with associated conveying lines.

• eine Mischtrommel zur Aufnahme und Bereitstellung von Material; und/oder einen Verteilermast zum Ausbringen oder Einholen von Material; und/oder eine Übergabevorrichtung zur Zusammenführung von zu förderndem Material einerseits und einem mittels des Fluidstromgenerators erzeugten Fluidstrom zum Antreiben des Materials andererseits; und/oder
• eine Abscheidevorrichtung zum Abscheiden von eingeholtem Material aus einem mittels des Fluidstromgenerators erzeugten Saugfluidstrom.

It can be advantageous if the transport vehicle also includes the following:

• a mixing drum for receiving and delivering material; and/or a placing boom for placing or hauling in material; and/or a transfer device for bringing together material to be conveyed on the one hand and a fluid flow generated by means of the fluid flow generator for driving the material on the other hand; and or
• a separation device for separating retrieved material from a suction fluid flow generated by the fluid flow generator.

The transport vehicle is in particular a truck mixer and/or a vehicle with a placing boom, but is used as an alternative or in addition to transporting and/or pumping concrete, for example, for transporting and/or pumping bulk material or other material that has not hitherto been continuously pumpable with conventional concrete pumps.

The transport vehicle is preferably of modular design.

In particular, one or more components of the transport vehicle can be assembled or disassembled as required, for example the mixing drum, the placing boom, the transfer device, the separating device, a conventional concrete pump and/or one or more fluid flow generators. As a result, the transport vehicle can be optimized in particular for different purposes with regard to the maximum payload. For example, the transport vehicle can preferably be used as a conventional truck mixer with maximum payload by dismantling the components of the conveyor device according to the invention.

1. a) einer Übergabevorrichtung zur Zusammenführung von zu förderndem Material einerseits und einem mittels des Fluidstromgenerators erzeugten Fluidstrom zum Antreiben des Materials andererseits; und/oder
2. b) einer Abscheidevorrichtung zum Abscheiden von eingeholtem Material aus einem mittels des Fluidstromgenerators erzeugten Saugfluidstrom; und/oder
3. c) einer Betonpumpe, insbesondere einer herkömmlichen Betonpumpe, welche beispielsweise liegend, insbesondere querliegend, an dem Transportfahrzeug festlegbar ist.

It can be favorable if the transport vehicle comprises one or more coupling devices for the optional and/or alternative arrangement of the following:

1. a) a transfer device for bringing together material to be conveyed on the one hand and a fluid flow generated by means of the fluid flow generator for driving the material on the other hand; and or
2. b) a separating device for separating retrieved material from a suction fluid flow generated by the fluid flow generator; and or
3. c) a concrete pump, in particular a conventional concrete pump, which can be fixed, for example lying, in particular lying transversely, to the transport vehicle.

As a result, the transport vehicle can optionally and/or alternatively be equipped with a bulk material pump or a suction pump.

In one embodiment of the invention, it can be provided that the transport vehicle comprises a fluid flow generator which comprises two fluid cylinder devices, each of which has two fluid chambers arranged linearly one after the other.

The two fluid cylinder devices are preferably arranged on opposite sides of a mixing drum and/or a distributor boom of the transport vehicle.

Material to be conveyed is in particular Leca concrete, lean concrete, lightweight concrete, steel fiber concrete, gravel, sand, grit, broken or shredded material (e.g. up to a grain size size of about 63 mm), granulates, recycling material, material for green roofs, etc.

Volume flows of at least approximately 20 m ³ /h, preferably at least approximately 30 m ³ /h, for example at least approximately 40 m ³ /h, can be generated by means of the fluid flow generator, particularly in a blowing operation. In particular, the volume flow is approximately 47 m ³ /h. In suction operation, the volume flow is preferably at least approximately 40 m ³ /h, in particular at least approximately 50 or 60 m ³ /h, for example approximately 69 m ³ /h.

A pressure of the generated fluid flow that can be achieved immediately downstream and/or immediately downstream of the fluid flow generator is preferably at least approximately 3 bar, in particular at least approximately 4 bar, for example approximately 4.7 bar or 6.4 bar.

Alternatively or additionally, a maximum pressure of at most approximately 10 bar, for example at most approximately 9 bar, in particular at most approximately 8 bar, can be provided immediately upstream and/or immediately downstream of the fluid flow generator.

In this description and the appended claims, the terms “approximately” and “at least approximately” mean a deviation of at most 40%, in particular at most 20%, for example at most 5%, of the value specified in each case.

Further preferred features and/or advantages of the invention are the subject of the following description and the graphic representation of an exemplary embodiment.

• 1 eine schematische Darstellung eines Transportfahrzeugs, welches eine Fördervorrichtung zum Fördern von Schüttgut mittels eines Fluidstromgenerators umfasst;
• 2 eine schematische Schnittdarstellung durch zwei Fluidzylindervorrichtungen des Fluidstromgenerators;
• 3 eine schematische Draufsicht auf ein Verbindungselement des Fluidstromgenerators, welches zwischen zwei Fluidräumen einer Fluidzylindervorrichtung angeordnet ist;
• 4 ein schematisches Schaltbild zur Illustration der Funktionsweise des Fluidstromgenerators in einem Normalbetrieb, insbesondere Blasbetrieb desselben,
• 5 eine der 4 entsprechende schematische Darstellung zur Illustration eines Saugbetriebs des Fluidstromgenerators;
• 6 eine schematische Darstellung einer Übergabevorrichtung der Fördervorrichtung aus 1;
• 7 eine vergrößerte Darstellung eines Abführbereichs der Übergabevorrichtung aus 6;
• 8 eine schematische Draufsicht auf eine obere Aufspannplatte einer Revolvervorrichtung der Übergabevorrichtung aus 6;
• 9 eine schematische Draufsicht auf eine obere Druckscheibe der Revolvervorrichtung;
• 10 eine schematische Draufsicht auf eine obere Dichtscheibe der Revolvervorrichtung;
• 11 eine schematische Draufsicht auf eine Rotorscheibe der Revolvervorrichtung;
• 12 eine schematische Draufsicht auf eine Mitnehmerscheibe der Revolvervorrichtung;
• 13 eine schematische Draufsicht auf eine untere Dichtscheibe der Revolvervorrichtu ng;
• 14 eine schematische Draufsicht auf eine untere Druckscheibe der Revolvervorrichtu ng;
• 15 eine schematische Draufsicht auf eine untere Aufspannplatte der Revolvervorrichtung; und
• 16 eine schematische Draufsicht auf eine Mischvorrichtung zum Zuführen von Schüttgut zu der Revolvervorrichtung.

In the drawings show:

• 1 a schematic representation of a transport vehicle, which comprises a conveying device for conveying bulk material by means of a fluid flow generator;
• 2 a schematic sectional view through two fluid cylinder devices of the fluid flow generator;
• 3 a schematic plan view of a connecting element of the fluid flow generator, which is arranged between two fluid chambers of a fluid cylinder device;
• 4 a schematic circuit diagram to illustrate the functioning of the fluid flow generator in normal operation, in particular blowing operation of the same,
• 5 one of the 4 corresponding schematic representation to illustrate a suction operation of the fluid flow generator;
• 6 a schematic representation of a transfer device of the conveyor device 1 ;
• 7 shows an enlarged view of a discharge area of the transfer device 6 ;
• 8th a schematic plan view of an upper platen of a turret device of the transfer device 6 ;
• 9 a schematic plan view of an upper thrust washer of the turret device;
• 10 a schematic plan view of an upper sealing disk of the turret device;
• 11 a schematic plan view of a rotor disk of the turret device;
• 12 a schematic plan view of a drive plate of the turret device;
• 13 a schematic top view of a lower sealing disk of the turret device;
• 14 a schematic plan view of a lower thrust washer of the turret device;
• 15 a schematic plan view of a lower platen of the turret device; and
• 16 a schematic plan view of a mixing device for feeding bulk material to the turret device.

Identical or functionally equivalent elements are provided with the same reference symbols in all figures.

a in 1 The transport vehicle shown, designated as a whole with 100, is, for example, a truck for transporting bulk goods, concrete, etc.

The transport vehicle includes, in particular, a carrier vehicle 102, which includes, for example, a four-axle basic structure and a driver's cab.

A structure of transport vehicle 100 preferably includes a mixing drum 104 for receiving material to be transported, a distribution boom 106, a fluid flow generator 108 for generating a fluid flow, in particular an air flow, a drive device 110 for driving fluid flow generator 108, and a transfer device 112 for transferring material to be conveyed changing material from the mixing drum 104 to the placing boom 106.

The transport vehicle 100 thus includes in particular a conveying device 114 for conveying material, the conveying device 114 in particular including the fluid flow generator 108 , the drive device 110 , the transfer device 112 and the distributor boom 106 .

In particular, pourable or free-flowing material and special concretes can be conveyed by means of the conveying device 114, which usually cannot be conveyed with conventional concrete pumps due to inconsistent pressure levels, inconsistent grading curves, inconsistent mixing ratios, inconsistent water content and/or cement content, etc.

Conveying device 114 is or therefore includes, in particular, a bulk material pump 116.

It can be favorable if the transport vehicle 100 includes a coupling device 118 by means of which the transfer device 112 is detachably connected or can be connected to the carrier vehicle 102 .

The transfer device 112 can thus be arranged on the carrier vehicle 102 or removed from it as required, in order ultimately to be able to convey bulk material if necessary or to increase the maximum payload of the transport vehicle 100 in the dismantled state and thus to transport a larger quantity of material in the mixing drum 104 make possible.

The coupling device 118 can also be used to mount a separating device 120 of the conveyor device 114 or a conventional concrete pump, in particular a concrete pump mounted transversely, on the carrier vehicle 102 .

Conveying device 114 preferably comprises transfer device 112 and/or separating device 120 as an alternative or in addition to one another.

The separating device 120 can in particular enable material to be sucked in and thus fed to the mixing drum 104 by operating the fluid flow generator 108 in a suction mode and sucking in material to be conveyed via the distributor boom 106 , for example. The aspirated material is then separated in particular upstream of the fluid flow generator 108 by the separating device 120 from the suction air flow generated by the fluid flow generator 108 and finally fed to the mixing drum 104 or a container provided.

Conveying device 114 is or therefore also includes a suction pump 122, for example.

The drive device 110 for driving the fluid flow generator 108 is or preferably includes a hydraulic drive 124 as well as a plurality of hydraulic cylinder devices to be described, a control device to be described and a hydraulic piping system (not shown).

The transport vehicle 100 can be, for example, a four-axle vehicle with a permissible total weight of 32 t. An internal combustion engine with an output of 390 kW, for example, can be provided as the drive. This internal combustion engine can be used for the use of the conveyor device 114 to supply the drive device 110 and other components of the transport vehicle 100 with electrical energy and/or mechanical energy.

The placing boom 106 preferably has a range of at least about 20 m, for example 26 m. In particular when the mixing drum 104 is not provided, a larger distribution boom 106 with a range of more than 30 m, for example, and in particular a range of 36 m, can be provided. Furthermore, pump heights of preferably 40 m and more can be realized.

A delivery line of the distributor boom 106 preferably has an inside diameter of 110 mm.

In comparison to conventional concrete pumps, the fluid flow generator 108 can also be used to convey material that has not previously been conveyable, in particular bulk material such as gravel, sand, etc. The fluid flow generator 108 makes this possible by providing a particularly large fluid volume flow, in particular an air volume flow of approximately 47 m ³ /h or 69 m ³ /h.

• Der Fluidstromgenerator 108 umfasst eine oder mehrere, beispielweise zwei, Fluidzylindervorrichtungen 126, welche jeweils beispielsweise zwei Fluidräume 128 aufweisen.

The fluid flow generator 108, which in the 2 until 5 is shown schematically, has the following structure and the following mode of operation:

• The fluid flow generator 108 includes one or more, for example two, fluid cylinder devices 126 each having, for example, two fluid chambers 128 .

A fluid piston 130 is arranged in each of these fluid chambers 128 so that it can move along an axial direction 132 .

For this purpose, the fluid pistons 130 are fixed, in particular, to a drive element 134 which can be displaced in the axial direction 132 together with the fluid pistons 130 .

The drive element 134 is in particular a piston rod 136.

The piston rod 136 is passed through all the fluid chambers 128 of each fluid cylinder device 126 and is provided with a hydraulic piston 138 at each of its two ends.

The two ends of the drive element 134 each protrude into a hydraulic cylinder device 140 of the fluid flow generator 108 and can thus be displaced in the hydraulic chambers 142 along the axial direction 132 .

The hydraulic cylinder devices 140 are part of the drive device 110 for driving the fluid flow generator 108.

In particular, one or more hydraulic pumps can be used to generate different pressure conditions in the subchambers of each hydraulic chamber 142 that are separated from one another by the respective hydraulic piston 138 in order ultimately to displace the hydraulic piston 138 in the axial direction 132 . As a result, the entire drive element 134 together with the fluid piston 130 attached thereto can thus also be displaced in the axial direction 132 .

The displacement of the fluid pistons 130 in the fluid chambers 128 causes the fluid contained in the fluid chambers 128 to be set in motion and/or under pressure. In particular, the fluid is sucked into the fluid chamber 128 on one side of the fluid piston 130 and is pressed out of the fluid chamber 128 on the other side of the fluid piston 130 . For this purpose, all fluid chambers 128 are accessible by means of a plurality of fluid openings 144 for the supply and removal of fluid. For example, at least two or at least four fluid openings 144 for supplying fluid and at least two or at least four fluid openings 144 for removing fluid can be provided for each fluid chamber 128 and/or for each of the two parts of each fluid chamber 128 separated from one another by fluid piston 130.

The fluid openings 144 are connected to one another by means of a line system in such a way that fluid flowing out of a plurality of fluid chambers 128 is brought together and is available as a fluid stream to be provided for further use.

A transfer of fluid from a fluid space 128 into a further fluid space 128 is preferably not provided.

All fluid chambers 128 are thus preferably flowed through by fluid parallel to one another.

The fluid cylinder devices 126 also preferably include one or more supply openings 146, via which coolant and/or lubricant can be supplied to the fluid chambers 128, the fluid piston 130, one or more hollow cylinders 148 and/or the drive element 134. In particular, this can prevent or at least minimize undesired local or global heating or undesired wear of the components of the fluid cylinder devices 126 . In particular for external cooling, cooling lines, for example cooling coils, can be arranged on the outer walls of the fluid chambers 128 .

It can be favorable if the drive element 134 is lubricated in the area of the passage through the walls of the fluid chambers 128 . In this way, in particular, a sealing function can be ensured in this area.

The fluid chambers 128 are preferably designed to be essentially rotationally symmetrical.

For example, a radial delimitation with respect to the axial direction 132 can be provided in the form of a hollow cylinder 148 . A connecting element 150, for example a connecting flange 152, is preferably provided between two fluid chambers 128.

Facing the hydraulic cylinder devices 140 , the fluid spaces 128 are preferably bounded by end plates 154 .

The end plates 154 and the connecting elements 150 are preferably provided with a concave surface facing the respective fluid space 128 . The fluid pistons 130, on the other hand, have convex surfaces corresponding thereto. This configuration can in particular enable an optimized flow through the fluid chamber 128, for example one that is as turbulent as possible.

In particular to reduce corrosion, friction and/or wear, it can be provided that the insides of the hollow cylinders 148 and/or the fluid pistons 130 are provided with a coating, for example a plastic coating and/or a nickel and/or chromium coating.

One or more discharge openings 156 can be used, for example, to discharge condensed water from the fluid chambers 128 . In addition, one or more pressure relief valves, in particular safety valves, can be provided in the one or more discharge openings 156 . Such discharge openings 156 are provided in the end plates 154 in particular.

The feed openings 146 are also preferably arranged and/or formed in the end plates 154 and/or in the connecting element 150 .

The hydraulic cylinder devices 140 are preferably fixed to the end plates 154, in particular flanged thereto.

It can be favorable if the fluid flow generator 108 includes a control device 158 .

In particular, control device 158 can be used to control valves of drive device 110 in such a way that the two fluid cylinder devices 126 are operated with very short switchover times and/or with a phase offset, for example by approximately 90°, which means that fluid pistons 130 of fluid cylinder devices 126 reach the respective reversal positions in the fluid chambers 128 offset in time.

By combining the fluid flow flowing out of all fluid chambers 128, a particularly uniform fluid flow can thus be provided for further use of the same.

How in particular 3 As can be seen, the connecting element 150 comprises a receptacle 160 for receiving and/or fixing the hollow cylinders 148 radially delimiting the fluid spaces 128. Furthermore, a plurality of fluid openings 144 for supplying and/or removing fluid from the fluid spaces 128 are provided.

The connecting element 150 is designed in such a way that the fluid openings 144 connect the respective fluid space 128 to a radially outer edge 162 of the connecting element 150 . The line system of the fluid flow generator 108 can be connected to this edge 162 in order to continue the generated fluid flow and/or to supply fresh fluid.

Furthermore, the connecting elements 150 preferably include one or more passages 164 for one or more tie rods, which ultimately connect the end plates 154 to one another and thereby clamp the hollow cylinders 148 and the connecting element 150 between them.

how 4 can be seen, the fluid flow generator 108 can be operated in particular in normal operation as blowing operation. Hydraulic fluid can be supplied to hydraulic chambers 142 by means of a hydraulic pump 166 of drive device 110 in such a way that in a hydraulic cylinder device 140 a rod-side partial chamber 168 of hydraulic chamber 142 that faces fluid chambers 128 with respect to hydraulic piston 138 can be pressurized. On the other hand, on the opposite hydraulic cylinder device 140 , a subchamber 170 of the hydraulic chamber 142 on the bottom side that faces away from the fluid chambers 128 with respect to the hydraulic piston 138 is pressurized.

The respective other partial chamber 170, 168 of the hydraulic chambers 142 is subjected to a negative pressure, so that ultimately both hydraulic pistons 138 are pushed or pulled in the same direction along the axial direction 132. Here, the entire drive element 134 is moved along the axial direction 132 together with the fluid piston 130 .

Once the hydraulic pistons 138 and/or the fluid pistons 130 have reached a setting, the pressurization in the compartments 168, 170 is reversed so that the entire drive element 134 including the fluid pistons 134 and the hydraulic pistons 138 is moved in the opposite direction.

This reciprocating movement of the fluid pistons 130 ultimately results in the alternate suction and expulsion of fluid into and out of the fluid chambers 128.

In a blowing operation of the fluid flow generator 108, the fluid flowing out of the fluid chambers 128 is used as a driving medium for driving material to be conveyed.

In suction operation of the fluid flow generator 108, on the other hand, a fluid, for example air, flowing into the fluid chambers 128, in particular sucked in, is used as a driving medium for driving the material to be conveyed.

how 5 can be seen, for such a suction operation, it can be provided, for example, that only the sub-chambers 170 on the bottom side are acted upon by hydraulic medium, while the sub-chambers 168 on the rod side are directly connected to one another and thus continuous pressure equalization between these sub-chambers is possible.

Depending on the fluid volume flow required, each of the fluid cylinder devices 126 can, if necessary, only be used in one direction of movement along the axial direction 132 to supply fluid or to suck in fluid, while the movement in the opposite direction only serves to return the drive element 134 together with the fluid pistons 130 into an initial state. For example, the return is then carried out according to in 5 illustrated only bottom-side pressurization, while providing a usable fluid flow, for example, according to 4 both the sub-chambers 170 on the bottom side and the sub-chambers 168 on the rod side are pressurized in the sense of maximum force generation and/or pressure generation.

The only bottom-side pressurization according 5 enables in particular comparatively higher pressures of, for example, approximately 6.4 bar and/or higher volume flows of, for example, approximately 69 m ³ /h, as a result of which this operating mode can be used in particular for suction operation.

The bottom and rod side pressurization according to 4 enables in particular comparatively lower pressures of, for example, approximately 4.7 and/or lower volume flows of, for example, approximately 47 m ³ /h, as a result of which this operating mode can be used in particular for the blowing operation.

In the 6 until 16 the transfer device 112 and individual parts thereof are shown in more detail.

In particular, the transfer device 112 forms an interface between the mixing drum 104 and the placing boom 106.

Transfer device 112 thus makes it possible, in particular, to receive material to be conveyed, for example bulk material, and to transfer it to a line system of conveyor device 114.

For this purpose, the transfer device 112 comprises a filling opening 172 which is formed, for example, in a receiving device 174 for receiving material to be conveyed.

The receiving device 174 is in particular a funnel 176.

A bottom area 178 of the receiving device 174 is preferably provided with a mixing element 180, for example a mixing cross 182, in order to distribute or even out material received in the receiving device 174 within the receiving device 174. The mixing element 180 can be rotated in particular relative to a floor panel 179 of the floor area. One or more intermediate elements can be arranged between the mixing cross 182 and the base plate 179, in particular wear elements, for example wear plates, which are fixed to the base plate 179 in a rotationally fixed manner.

A mixing element 180 designed as a mixing cross 182 or including such a mixing element is shown by way of example in 16 shown.

The receiving device 174 also includes one or more guide elements 184 for guiding the material towards the bottom area 178.

These guide elements 184 are designed, for example, as a wall lining, in particular as rubber mats.

It can be favorable if the guide elements 184 can be flowed behind, for example to apply compressed air to or on these guide elements 184 and thereby generate an oscillating effect and/or shaking effect. As a result, the material can be distributed and/or passed on particularly efficiently in the receiving device 174 .

In particular, undesired clogging by material jamming can be avoided.

For example, pulsating compressed air can be made available on the guide elements 184 in that vent openings 191 for venting the pumping chambers 232 are connected to the guide elements 184 via fluid lines, in particular in such a way that the fluid lines lead into an intermediate space or intermediate area between a wall of the receiving device 174 and the guide elements 184 flow.

The receiving device 174 also preferably includes a deflector plate 186, for example a slide, by means of which a feed area 188 of the transfer device 112, in particular a turret device 190 of the transfer device 112, can be covered or otherwise protected and/or by means of which material to be conveyed can be metered to the feed area 188.

In particular, the deflection plate 186 can be used to prevent material introduced into the filling opening 172 from reaching the feed area 188 directly.

Furthermore, a water supply 192 is assigned to the receiving device 174 , for example. Water can preferably be supplied to the material to be conveyed by means of this water supply 192 in order to simplify its conveyance by increasing the lubricity.

The mixing element 180 is arranged in the receiving device 174 so as to be rotatable about an axis of rotation 198 by means of a drive 194 , for example by means of an oil motor 196 .

A slewing gear 200 ensures a rotational frequency of the mixing element 180 in a desired value range.

The material that was fed to the receiving device 174 via the filling opening 172 can be fed to the feed area 188 of the turret device 190 by means of the mixing element 180 .

The turret device 190 comprises, in particular, a plurality of rotor segments 202, for example eight, which can be rotated about a common axis of rotation 204. In particular, a further drive 194, for example a further oil motor 196 together with a further slewing gear 200, is provided for this rotation.

Each rotor segment 202 forms a cavity for receiving material to be conveyed. In particular, each rotor segment 202 forms or includes exactly one conveying chamber 232.

The cavities can be rotated about the axis of rotation 204 , as a result of which material picked up by the respective rotor segment 202 can be conveyed in batches from the feed area 188 of the turret device 190 to a discharge area 206 of the turret device 190 .

In the feed area 188, the rotor segment 202 temporarily positioned therein is accessible via a filling opening 208 in an upper clamping plate 222, in an upper pressure disk 210 and in an upper sealing disk 211 of the turret device 190, so that material from the receiving device 174 can flow into the cavity of the rotor segment 202 can reach (see in particular 6 , 7 , 8th and 9 ). The material and the geometry of the edge of the filling opening 208, ie the material and the geometry of the upper clamping plate 222, the material and the geometry of the upper pressure disk 210 as well as the material and the geometry of the upper sealing disk 211 are preferably selected in such a way that when the Rotor segments 202 protruding from the conveying chambers 232 objects are severed by means of the upper clamping plate 222, the upper pressure disc 210 and / or the upper sealing disc 211.

As an alternative or in addition to this, a control and/or regulation of the filling, in particular a limitation of the degree of filling, can be provided in order to avoid protruding material in the feed area.

A pressure difference arising from filling or emptying the cavities of the rotor segments 202 can preferably be compensated for by means of one or more ventilation openings 191 (see Fig 8th and 9 ). In particular, an overpressure from the conveying chambers 232 , which are emptied one after the other, can be provided as pulsating compressed air on the guide elements 184 .

The rotor segments 202 are filled one after the other by rotating them about the axis of rotation 204 until they finally arrive in the discharge area 206 and are acted upon there via a fluid flow feed 212 with a fluid flow generated by the fluid flow generator 108 .

The fluid flow flows through the rotor segment 202 in particular in the direction of gravity from top to bottom and thus conveys (together with the force of gravity) the material initially arranged in the rotor segment 202 out of the same.

The material and the fluid passed through the rotor segment 202 exit the turret device 190 in particular through a removal opening 214 of a lower sealing disk 216 and the lower clamping plate 224 of the turret device 190 (see Fig 14 and 15 ).

Finally, a material discharge 217 preferably opens into a line system of the conveying device 114, for example into a pipe or hose of the distributor boom 106.

It can be favorable if additional fluid is supplied to the already existing mixture of material to be conveyed and fluid via an additional fluid flow feed 218, which in particular forms an injection connection 220, downstream and/or with respect to the direction of gravity below the removal opening 214.

In particular, the overall fluid flow provided by the fluid flow generator 108 is preferably divided into two partial flows, one partial flow being supplied via the fluid flow feed 212 and another partial flow being supplied via the additional fluid flow feed 218 . This can preferably a fluidization and / or loosening of the material to be conveyed, a Fördereffi ciency and/or acceleration of the material can be optimized.

how 6 As can be seen, the rotor segments 202 of the turret device 190 are formed in particular by a plurality of ring-shaped elements or disk-shaped elements stacked one on top of the other and braced against one another.

In particular, the components of the turret device 190 that form the rotor segments 202 are braced against one another by means of an upper clamping plate 222 and a lower clamping plate 224 .

How in particular 7 can be seen, the upper pressure plate 210 (see Fig 9 ), the upper sealing washer 211 (see 10 ), then several, for example three, rotor discs 226 (see 11 ), a drive plate 228 (see 12 ), then two more rotor discs 226, then the lower sealing disc 216 (see 12 ) and finally a lower thrust washer 230 is provided.

All of the elements arranged between the platens 222, 224 enclose a plurality of conveying spaces 232 for receiving and conveying material. Each rotor segment 202 preferably surrounds or preferably forms a delivery chamber 232.

In particular, the rotor disks 226, but also the pressure disks 210, 230, the sealing disks 211, 216 and/or the driver disk 228 can, for example, comprise a base body made of a plastic material. As a result, a particularly light configuration can be implemented. The inner sides of the respective base body facing the conveying chambers 232 are then preferably lined, in particular with a metallic material, for example a sheet steel.

Due to the rotation of some components of the turret assembly 190, there are rubbing elements which are subject to wear. These are, in particular, the upper pressure disk 210, the upper sealing disk 211, the lower sealing disk 216 and the lower pressure disk 230. Lubrication via feed openings 146 can be provided to minimize wear.

Preferably, the upper thrust washer 210, the upper sealing washer 211, the lower sealing washer 216, and/or the lower thrust washer 230 are reversible, i.e., up or down, and/or in different rotational orientations along the direction of gravity.

In order to minimize a loss of fluid in the discharge area 206, in particular due to scoring that forms as a result of wear, it can be advantageous if, in order to increase a prestressing force, an additional pressure device, for example a pressure bellows 225, is provided in addition to a clamping device for clamping the clamping plates 222, 224 against one another. by means of which the components of the turret device 190 can be pressed onto one another at least in the discharge area 206.

For this purpose, the additional pressure device is arranged in particular above the discharge area 206 and acts in particular on the fluid flow feed 212 in a pneumatically controlled manner.

The drive 194 for rotating all of the rotor segments 202 about the axis of rotation 204 preferably acts on the driver disk 228, which then transmits the rotational movement to the other, mechanically connected, rotating parts of the turret device 190.

The transfer device 112 can thus be used to supply material from the receiving device 174 to the discharge area 206 in a quasi-continuous manner and to convey it further via a pipe system using fluid provided by the fluid flow generator 108 .

By using the fluid, in particular compressed air, bulk material or other pourable or free-flowing material can also be conveyed, which was not or at least not (quasi-) continuously and/or not quality-assured conveyable with conventional concrete pumps.

Reference List

100

transport vehicle

102

carrier vehicle

104

mixing drum

106

placing boom

108

fluid flow generator

110

drive device

112

transfer device

114

conveyor

116

bulk pump

118

coupling device

120

separating device

122

suction pump

124

hydraulic drive

126

fluid cylinder device

128

fluid space

130

fluid piston

132

axial direction

134

drive element

136

piston rod

138

hydraulic piston

140

hydraulic cylinder device

142

hydraulic room

144

fluid port

146

feed opening

148

hollow cylinder

150

fastener

152

connecting flange

154

end plates

156

discharge opening

158

control device

160

Recording

162

edge

164

execution

166

hydraulic pump

168

rod-side subspace

170

floor-side compartment

172

filling hole

174

recording device

176

funnel

178

floor area

179

floor pan

180

mixing element

182

mixing cross

184

guide element

186

baffle plate

188

feeding area

190

turret device

191

vent hole

192

water supply

194

drive

196

oil engine

198

axis of rotation

200

slewing gear

202

rotor segment

204

axis of rotation

206

discharge area

208

filling opening

210

upper thrust washer

211

upper sealing washer

212

fluid flow delivery

214

removal opening

216

lower sealing washer

217

material removal

218

Auxiliary Fluid Flow Feed

220

injection port

222

upper clamping plate

224

lower platen

225

pressure bellows

226

rotor disc

228

drive plate

230

lower thrust washer

232

conveyor room

Claims (13)

A fluid flow generator (108) for generating a fluid flow, the fluid flow generator (108) comprising: - One or more fluid cylinder devices (126), which each comprise at least one fluid space (128) and at least one fluid piston (130) movably arranged in the respective fluid space (128); - a drive device (110) for driving the at least one fluid piston (130) in the at least one fluid chamber (128), one or more of the fluid cylinder devices (126) each comprising at least two fluid chambers (128) arranged linearly one after the other, and wherein the fluid pistons (130) of these fluid chambers (128) arranged linearly one after the other can be driven by means of a common drive element (134) of the drive device (110), in particular by means of a common piston rod (136) of the drive device (110). fluid flow generator (108). claim 1 , characterized in that the fluid chambers (128) arranged linearly one after the other are connected to one another by means of one or more connecting elements (150), in particular connecting flanges (152), each connecting element ment (150) comprises a plurality of fluid openings (144), by means of which in particular fluid can be supplied to one of the fluid spaces (128) and fluid can be discharged from another of the fluid spaces (128) at the same time. fluid flow generator (108). claim 1 or 2 , characterized in that each fluid cylinder device (126) for driving the respective at least one fluid piston (130) is assigned at least one hydraulic cylinder device (140) of the drive device (110). fluid flow generator (108). claim 3 , characterized in that each fluid cylinder device (126) is assigned two hydraulic cylinder devices (140), the hydraulic cylinder devices (140) being located at opposite ends of a fluid space (128) or at opposite ends of a row of a plurality of fluid spaces (128) arranged linearly one after the other are arranged. Fluid flow generator (108) according to any one of Claims 1 until 4 , characterized in that the fluid flow generator (108) comprises a control device (158) by means of which a plurality of fluid cylinder devices (126) and/or a plurality of drive devices (110) are coupled to one another in such a way that the fluid pistons (130) differ from one another in terms of fluid cylinder devices (126) in terms of time offset to each other reach their respective movement reversal points. Conveying device (114) comprising a fluid flow generator (108) according to any one of Claims 1 until 5 . Conveyor (114) after claim 6 , characterized in that the conveying device (114) comprises a turret device (190) for bringing together material to be conveyed on the one hand and a fluid flow generated by means of the fluid flow generator (108) for driving the material on the other hand. Conveying device (114) according to one of Claims 6 or 7 , characterized in that the conveying device (114) comprises a transfer device (112) for bringing together material to be conveyed on the one hand and a fluid flow generated by means of the fluid flow generator (108) for driving the material on the other hand, a fluid guide of the conveying device (114) being provided in this way that a first partial flow of the fluid flow can be passed through a discharge area (206) of the transfer device (112) and thereby fed to the material to be conveyed and that a second partial flow of the fluid flow downstream of the discharge area (206) is mixed with the first partial flow and already out the material conveyed out of the discharge area (206) can be fed. Bulk material pump (116) comprising a fluid flow generator (108) according to any one of Claims 1 until 5 for generating a flow of pressurized fluid. A suction pump (122) comprising a fluid flow generator (108) according to any one of Claims 1 until 5 for generating a suction fluid flow. Transport vehicle (100), in particular truck, comprising a fluid flow generator (108) according to one of Claims 1 until 5 and / or a conveyor device (114) according to one of Claims 6 or 7 and/or a bulk material pump (116). claim 9 and/or a suction pump (122). claim 10 . Transport vehicle (100) after claim 11 , characterized in that the transport vehicle (100) further comprises: a) a mixing drum (104) for receiving and providing material; and/or b) a placing boom (106) for spreading or collecting material; and/or c) a transfer device (112) for bringing together material to be conveyed on the one hand and a fluid flow generated by means of the fluid flow generator (108) for driving the material on the other hand; and/or d) a separating device (120) for separating retrieved material from a suction fluid flow generated by the fluid flow generator (108). Transport vehicle (100) according to one of Claims 11 or 12 , characterized in that the transport vehicle (100) comprises one or more coupling devices (118) for the optional and/or alternative arrangement of the following: a) a transfer device (112) for bringing together material to be conveyed on the one hand and a fluid flow generator (108) generated fluid flow to propel the material on the other hand; and/or b) a separating device (120) for separating collected material from a suction fluid flow generated by the fluid flow generator (108); and/or c) a concrete pump, in particular a conventional concrete pump, which can be fixed, for example lying, in particular lying transversely, to the transport vehicle.

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