EP4357556A1 - Construction machine, retrofit kit and method - Google Patents

Abstract

The invention relates to a construction machine (1) for conveying thick material, the construction machine (1) comprising: a pressure nozzle (2), the pressure nozzle (2) delimiting a fluid channel (3) which is open outwards to an external environment of the construction machine (1), the fluid channel (3) being flowed through by thick material in a conveying direction (F) during a conveying operation of the construction machine (1), a flushing device (4) through which a flushing liquid (S) can flow, at least one liquid jet (B1) of flushing liquid (S) can be formed by means of the flushing device (4) during a flushing operation of the construction machine (1), the flushing device (4) and the pressure nozzle (2) comprising complementary coupling devices (19), the complementary coupling devices (19) being able to be coupled to one another in order to mount the flushing device (4) on the pressure nozzle (2) in such a way that the at least one liquid jet (B1) can be formed in the fluid channel (3) during the flushing operation.

Description

The invention relates to a construction machine for conveying thick material. The invention also relates to a retrofit kit for an initial construction machine for conveying thick material, wherein the initial construction machine can be retrofitted to a construction machine of the type mentioned above using the retrofit kit. The invention also relates to a method for flushing a construction machine of this type.

TASK AND SOLUTION

It is an object of the invention to provide a construction machine for conveying thick material, a retrofit kit for an initial construction machine for conveying thick material, and a method for flushing such a construction machine, which have improved properties.

This object is achieved by the subject matter of the independent patent claims. Preferred embodiments are the subject matter of the dependent patent claims.

A construction machine according to the invention is used to convey thick material. The construction machine has a pressure nozzle, the pressure nozzle delimiting a fluid channel that is open to the outside and to the external environment of the construction machine. In a conveying operation of the construction machine, thick material flows through the fluid channel in a conveying direction. In the conveying operation, the construction machine can convey thick material. For the conveying operation, a conveying line can be connected to the pressure nozzle in fluid communication with the fluid channel, by means of which the thick material conveyed away from the construction machine can be fed to a distribution system. The distribution system can be used to introduce the thick material transported by means of the conveying line into a cast mold. The construction machine also has a flushing device through which a flushing liquid can flow. In a flushing operation of the construction machine, at least one liquid jet of flushing liquid can be formed by means of the flushing device. The construction machine can be switched between its conveying and its flushing operation. The flushing device and the pressure nozzle have complementary coupling devices. In other words: Both the flushing device and the pressure nozzle each have a coupling device, whereby the coupling devices are coordinated with each other in a complementary manner. the complementary coupling devices can be coupled to one another in order to mount the flushing device on the pressure nozzle. As a result of the coupling of the complementary coupling devices, the flushing device can be mounted on the pressure nozzle in such a way that the at least one liquid jet can be formed in the fluid channel during flushing operation, in particular against the conveying direction. In particular, the at least one liquid jet can be formed within the fluid channel, i.e. a location for the formation of the liquid jet can be located within the fluid channel when the flushing device is mounted. The flushing device can protrude into the fluid channel when mounted. After the flushing device has been mounted on the pressure nozzle, the flushing operation can preferably be carried out automatically. The flushing device advantageously enables particularly thorough flushing of the fluid channel and of components arranged against the conveying direction through which the flushing liquid of the liquid jet can flow during the conveying operation of thick matter and during the flushing operation. In particular, the flushing device makes it possible to dispense with manual flushing of the pressure nozzle.

The term "configured" can be used synonymously for the term "trained".

The term "comprises" or "has" can be used synonymously with the term "comprises".

In this context, “control” can mean “steer” and/or “regulate”.

In the present context, the term "further" is not used with regard to a geometric extent or extension, unless otherwise stated, but in particular as a synonym for "further" or "additional" or "supplementary".

The thick material is preferably a building material. The thick material can be a paste-like mixture of different materials. The thick material can be mortar, cement, screed or concrete, each in a mixable and/or conveyable state. In the mixable and/or conveyable state, the thick material has not yet hardened or set.

During flushing operation, the construction machine can be flushed with flushing fluid. Flushing can be used to clean the construction machine. By flushing the construction machine with flushing fluid, thick material residues adhering to the surface can be rinsed off.

In an embodiment of the invention, the flushing device has a nozzle device that can be inserted into the fluid channel for forming the at least one liquid jet. In particular, the nozzle device is adjustable relative to the coupling device of the flushing device, in particular depending on a liquid pressure that drops when the at least one liquid jet is formed via the nozzle device. Thus, an impact point of the at least one liquid jet on an inner side of the pressure nozzle that delimits the fluid channel can be adjusted when the liquid jet is formed. Accordingly, the inner side of the pressure nozzle can be sprayed with liquid from the liquid jet at least in some areas, which enables particularly thorough cleaning of the inner side.

The nozzle device is expediently supported by a pre-tensioning element of the flushing device on the coupling device of the flushing device in such a way that the pre-tensioning element undergoes an elastic deformation when the nozzle device is adjusted relative to the coupling device of the flushing device, forming a restoring force. This restoring force can serve to return the nozzle device to its starting position when the liquid pressure falling across the nozzle device is reduced. This advantageously enables an automatic, pressure-dependent bidirectional adjustment of the nozzle device. In this way, the at least one liquid jet can be guided automatically bidirectionally along the conveying direction over an inner side of the fluid channel.

In a further embodiment of the invention, in an assembled state of the flushing device, a passage through which flushing liquid can flow is formed between the pressure port and the flushing device for draining back-flowing flushing liquid into an external environment of the construction machine. This can advantageously prevent flushing liquid, in particular too much, from accumulating in the fluid channel. In particular, the flushing device has a deflection device for diverting flushing liquid drained through the passage. The deflection device can advantageously ensure that the drained flushing liquid is directed along the shortest possible path towards a surface on which the construction machine can be parked.

In a further embodiment of the invention, the construction machine has a storage container, in particular one that is funnel-shaped at least in some areas. The storage container delimits on the inside a storage space of the construction machine for storing thick material, in particular one that is open at the top and can be covered by a cover of the construction machine. In particular, the construction machine has an openable emptying device that closes the storage space downwards, in particular in a direction of gravity. The construction machine also has at least one, in particular two, conveyor cylinders. Each conveyor cylinder has a variable-volume conveyor space for conveying thick material, with the conveyor space opening into the storage space. In addition, the construction machine has a, in particular S-shaped, pipe switch. The pipe switch delimits a control channel of the construction machine on the inside, the control channel being connected at one end, in particular permanently, to the fluid channel in a fluid-conducting manner. The pipe switch, in particular within the storage space, is adjustable relative to the conveying space in such a way that the conveying space can be connected alternately, in particular directly, to the storage space and by means of the control channel to the fluid channel in a fluid-conducting manner. Since the control channel is connected to the fluid channel in a fluid-conducting manner, the control channel can also be advantageously flushed with flushing liquid by means of the liquid jet during flushing operation.

In a further embodiment of the invention, the construction machine has a further flushing device through which flushing liquid can flow. In the flushing operation of the construction machine, at least one further liquid jet of flushing liquid can be formed at least partially within a storage space of the construction machine for storing thick material by means of the further flushing device. The storage space can thus advantageously be flushed, in particular automatically, with flushing liquid from the further liquid jet.

In a further embodiment of the invention, at least one volume-variable conveying chamber of the construction machine has a mouth opening at which the conveying chamber merges into the storage chamber. The at least one further liquid jet can be formed into the mouth opening and/or into corners of the storage chamber. A corner can be formed by at least one inner edge of the storage chamber. The corners can be rounded or bevelled. In particular, a separate further nozzle device of the further flushing device is present for each mouth opening and/or corner for forming at least one further liquid jet. This enables particularly thorough flushing or cleaning of the storage chamber and the at least one conveying chamber.

In a further embodiment of the invention, the further flushing device is mounted on the storage container so that it can move, in particular pivot, relative to the storage container in such a way that the further flushing device can be removed from the storage chamber for filling the storage space with thick material for the conveying operation and can be positioned on, in particular above and/or at least partially in, the storage chamber for the flushing operation. The storage space can thus advantageously be filled with thick material without this being hindered by the further flushing device being moved away from the storage chamber.

A retrofit kit according to the invention is designed for a starting construction machine for conveying thick material. The starting construction machine has a pressure nozzle, wherein the pressure nozzle has a Fluid channel, wherein thick material flows through the fluid channel in a conveying direction during conveying operation of the starting construction machine. The starting construction machine can be a conventional construction machine. The starting construction machine can be retrofitted to a construction machine according to the invention using the retrofit kit as described above. Accordingly, the advantages of the construction machine according to the invention described above can be utilized using the retrofit kit. The retrofit kit has the flushing device, in particular wherein the retrofit kit has at least one of the coupling devices. In addition, the retrofit kit can have a further flushing device.

A method according to the invention is used for flushing a construction machine according to the invention as described above. In particular, this construction machine has a retrofit kit according to the invention as described above. The advantages of the construction machine according to the invention and of the retrofit kit according to the invention explained above can be exploited by means of the method according to the invention. According to the method, the coupling devices are coupled to one another in order to mount the flushing device on the pressure nozzle. According to the method, the flushing device is also supplied with flushing liquid. The method also provides that the flushing device is used to form at least one liquid jet in the fluid channel, in particular against the conveying direction, so that the fluid channel is flushed with flushing liquid. The aforementioned measures are preferably carried out in the above order.

In an embodiment of the method, a storage chamber of the construction machine is opened downwards, in particular by means of an emptying device of the construction machine. "Downwards" can mean "in the direction of gravity". In particular, the storage chamber is opened downwards before and/or while the liquid jet is formed. The storage chamber is opened in order to drain thick material and/or flushing liquid stored in the storage chamber. In particular, thick material received in at least one volume-variable conveying chamber of the construction machine is drained into the storage chamber by minimizing the volume of this conveying chamber. The volume of the conveying chamber can be minimized by adjusting a conveying piston of a conveying cylinder of the construction machine relative to the storage chamber. Advantageously, the construction machine, in particular its storage chamber and preferably its at least one conveying chamber, can thus be emptied before the construction machine is flushed. The emptying device can remain open during flushing operation, so that an accumulation of flushing liquid in the storage chamber can be avoided.

In a further embodiment of the invention, a further flushing device of the construction machine is supplied with flushing liquid. In this case, by means of the further flushing device, at least one further liquid jet of flushing liquid is formed at least partially within a storage space of the construction machine for storing thick material. In particular, at least one volume-variable conveying space of the construction machine has an outlet opening at which the conveying space merges into the storage space, in particular wherein the at least one further liquid jet is formed into the outlet opening and/or in corners of the storage space. In this way, the storage space, in particular the outlet opening and/or the corners of the storage space, can be flushed particularly thoroughly.

In a further embodiment of the method, the at least one liquid jet and the at least one further liquid jet are formed one after the other or simultaneously. Forming the two liquid jets one after the other advantageously requires a particularly low volume flow of rinsing liquid for the two liquid jets. Simultaneous or simultaneous formation of the two liquid jets, on the other hand, proves to be particularly time-saving.

In a further embodiment of the method, while the at least one liquid jet is formed by means of a nozzle device of the flushing device, the nozzle device is adjusted relative to the coupling device of the flushing device, in particular against the conveying direction and/or within the fluid channel. Preferably, the adjustment of the nozzle device relative to the coupling device of the flushing device takes place depending on a liquid pressure that drops at the nozzle device when the at least one liquid jet is formed. By adjusting the nozzle device, the liquid jet can advantageously be guided along an inner side of the fluid channel, in particular against and/or in the conveying direction. The inner side of the fluid channel can thus be irradiated directly with the liquid jet over a particularly large area or even completely. If the adjustment of the nozzle device takes place depending on the liquid pressure, a separate drive for adjusting the nozzle device can advantageously be dispensed with.

In a further embodiment of the method, during the formation of the at least one liquid jet, a pipe switch of the construction machine, in particular one with an S shape, is adjusted relative to at least one volume-variable conveying chamber of a conveying cylinder of the construction machine. The pipe switch delimits a control channel of the construction machine on the inside, wherein the control channel is connected at one end in a fluid-conducting manner to the fluid channel, in particular permanently, in such a way that when the fluid channel is flushed, the control channel is also flushed with flushing liquid. In particular, during the formation of the at least one Liquid jet is adjusted relative to the at least one conveying chamber in such a way that the conveying chamber is alternately connected to the fluid channel by means of the control channel and, in particular directly, to a storage chamber of the construction machine in such a way that the conveying chamber is alternately flushed with flushing liquid guided through the control channel. This results in a particularly thorough flushing and, associated with this, a particularly thorough cleaning of the construction machine.

In a further embodiment of the method, while the at least one conveying chamber is fluidically connected to the control channel, a volume of this conveying chamber is varied, in particular maximized. Alternatively or additionally, a volume of at least one further conveying chamber is varied, in particular in the opposite direction, in particular minimized. In particular, the volume of the conveying chambers is varied, in particular minimized and/or maximized, by adjusting a conveying piston of the conveying cylinder having this conveying chamber, which delimits the relevant conveying chamber, relative to the fluid channel. In this way, the conveying chambers can also be flushed with flushing liquid in order to clean the conveying chambers.

BRIEF DESCRIPTION OF THE DRAWINGS

Further advantages and features of the invention emerge from the claims and from the following description of preferred embodiments of the invention, which are illustrated with reference to the drawings. The same reference numerals refer to the same or similar or functionally identical components.

Fig. 1

zeigt in einer schematischen Rückansicht eine Ausführungsform einer erfindungsgemäßen Baumaschine, die mittels eines gemäß der Erfindung ausgeführten Nachrüstsets nachgerüstet ist und die zur Durchführung eines erfindungsgemäßen Verfahrens für einen Spülbetrieb der Baumaschine eingerichtet ist,

Fig. 2

in schematischer Seitenansicht die Baumaschine nach Fig. 1,

Fig. 3

in schematischer Draufsicht die Baumaschine nach den Fig. 1 und 2,

Fig. 4

in schematischer Darstellung eines Vertikalschnitts die Baumaschine nach den Fig. 1 bis 3,

Fig. 5

in schematischer Rückansicht eine Spülvorrichtung für die Baumaschine nach den Fig. 1 bis 4,

Fig. 6

in schematischer Seitenansicht die Spülvorrichtung nach Fig. 5,

Fig. 7

in schematischer Vorderansicht die Spülvorrichtung nach den Fig. 5 und 6,

Fig. 8

in schematischer Draufsicht die Spülvorrichtung nach den Fig. 5 bis 7,

Fig. 9

teilweise vertikal geschnitten die Baumaschine nach den Fig. 1 bis 4,

Fig. 10

in schematischer Ausbruchsdarstellung eine weitere Ausführungsform der erfindungsgemäßen Baumaschine, die mittels eines weiteren gemäß der Erfindung ausgeführten Nachrüstsets nachgerüstet ist und die zur Durchführung eines erfindungsgemäßen Verfahrens für einen Spülbetrieb der Baumaschine eingerichtet ist,

Fig. 11

in schematischer Seitenansicht eine weitere Spülvorrichtung für die Baumaschine nach den Fig. 9 und 10,

Fig. 12

in schematischer Draufsicht eine weitere Ausführungsform der erfindungsgemäßen Baumaschine in der Art einer Momentaufnahme bei der Durchführung eines erfindungsgemäßen Verfahrens,

Fig. 13

die Baumaschine nach Fig. 12 in der Art einer weiteren Momentaufnahme bei der Durchführung des erfindungsgemäßen Verfahrens.

It is understood that the features mentioned above and those to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own, without departing from the scope of the present invention.

Fig.1

shows in a schematic rear view an embodiment of a construction machine according to the invention, which is retrofitted by means of a retrofit kit designed according to the invention and which is set up to carry out a method according to the invention for a flushing operation of the construction machine,

Fig. 2

in schematic side view the construction machine after Fig.1 ,

Fig.3

in schematic top view the construction machine according to the Fig.1 and 2 ,

Fig.4

in schematic representation of a vertical section the construction machine according to the Fig. 1 to 3 ,

Fig.5

in schematic rear view a flushing device for the construction machine according to the Fig. 1 to 4 ,

Fig.6

in schematic side view the flushing device according to Fig.5 ,

Fig.7

in schematic front view the flushing device according to the Fig. 5 and 6 ,

Fig.8

in schematic plan view the flushing device according to the Fig. 5 to 7 ,

Fig.9

partially cut vertically the construction machine according to the Fig. 1 to 4 ,

Fig.10

in a schematic excavation view a further embodiment of the construction machine according to the invention, which is retrofitted by means of a further retrofit kit designed according to the invention and which is set up to carry out a method according to the invention for a flushing operation of the construction machine,

Fig. 11

in schematic side view another flushing device for the construction machine according to the Fig.9 and 10 ,

Fig. 12

in a schematic plan view a further embodiment of the construction machine according to the invention in the form of a snapshot during the implementation of a method according to the invention,

Fig. 13

the construction machine after Fig. 12 in the form of a further snapshot during the implementation of the method according to the invention.

DETAILED DESCRIPTION OF THE EXAMPLES

A construction machine 1 according to the invention is intended for conveying thick material. The construction machine has a pressure nozzle 2. The pressure nozzle 2 defines a fluid channel 3 that is open to the outside environment of the construction machine 1. During conveying operation of the construction machine 1, thick material flows through the fluid channel 3 in a conveying direction F. During conveying operation, thick material can be conveyed from the construction machine 1 to the 1 in the conveying direction F. The construction machine 1 also has a flushing device 4 through which a flushing liquid S can flow. The liquid S can be water. In a flushing operation of the construction machine 1, at least one liquid jet B1 of flushing liquid S can be formed by means of the flushing device 4. By means of the flushing device 4, flushing liquid S can therefore be jetted out in at least one liquid jet B1. The flushing device 4 and the pressure nozzle 2 have complementary coupling devices 19. Both the flushing device 4 and the pressure nozzle 2 each have such a coupling device 19. The two complementary coupling devices 19 can be coupled to one another. In the conveying operation of the construction machine 1, the coupling devices 19 can be decoupled from one another. In the flushing operation, the complementary coupling devices 19 can be coupled to one another. The coupling devices 19 can be coupled to one another in order to mount the flushing device 4 on the pressure nozzle 2 in such a way that the at least one liquid jet B1 can be formed in the fluid channel 3 during the flushing operation. For example, the liquid jet B1 can be formed in the fluid channel 3 of the construction machine 1 against the conveying direction F during the flushing operation.

A sensor device 5 can be arranged on at least one of the coupling devices 19, by means of which it can be detected whether the two coupling devices 19 are coupled to one another or whether the two complementary coupling devices 19 are decoupled from one another. In other words: the sensor device 5 can detect an assembled state of the flushing device 4 and/or a disassembled state of the flushing device 4. The sensor device 5 can also serve to center the flushing device 4 and the pressure nozzle 2 relative to one another for the assembly of the flushing device 4 on the pressure nozzle 2. The sensor device 5 can detect whether the flushing device 4 and the pressure nozzle 2 are correctly aligned relative to one another.

The flushing device 4 in the present case has a nozzle device 6 that can be inserted into the fluid channel 3. The nozzle device 6 serves to form at least one liquid jet B1. For example, several liquid jets B1 of flushing liquid S can be formed simultaneously by means of the nozzle device 6, which are emitted radially outwards in a star-shaped or halo-like manner at an acute angle relative to the conveying direction F. These liquid jets B1 emitted in a star-shaped or halo-like manner can run in a virtual conical surface that tapers towards the nozzle device 6. When the flushing device 4 is assembled, the conical surface can taper in the conveying direction F and widen against the conveying direction F.

In the present case, the nozzle device 6 is supported on the coupling device 19 of the flushing device 4 by means of a pre-tensioning element 7 of the flushing device 4. The nozzle device 4 is supported on the coupling device 19 by means of the pre-tensioning element 7 in such a way that when the nozzle device 6 is adjusted relative to the coupling device 19 of the flushing device 4, the pre-tensioning element 7 undergoes an elastic deformation with the formation of a restoring force. As a result of this restoring force, the nozzle device 6 can be automatically adjusted back as soon as the fluid pressure falling across the nozzle device 6 is reduced. In particular, a positioning of the nozzle device 6 relative to the coupling device 19 of the flushing device 4 can be adjusted by an amount of the fluid pressure falling across the nozzle device 6. The pre-tensioning element 7 is designed as a helical spring in the present case.

For example, in the assembled state of the flushing device 4, a passage 8 is formed between the pressure port 2 and the flushing device 4. The passage 8 can be flown through by flushing liquid S. The passage through which the flushing liquid S can flow is used to drain back-flowing flushing liquid S into an external environment of the construction machine 1. The back-flowing liquid S is drained, for example, in the conveying direction F via the passage 8. The back-flowing liquid S can therefore flow or be drained through the fluid channel 3 via the passage 8 into the external environment against a jet direction of the at least one liquid jet B. In the present case, the flushing device 4 has a deflection device 9 for deflecting flushing liquid S drained through the passage 8.

In the present case, the construction machine 1 has a storage container 10. The storage container 10 is, for example, funnel-shaped at least in some areas. The storage container 10 delimits a storage space 12 of the construction machine 1 on the inside, which is used to store thick material. The storage space 12 is, for example, open upwards, in particular against the direction of gravity. The construction machine 1 can have a lid 11, by means of which the storage space 12 can be covered. In the present case, the construction machine 1 also has an emptying device 13. The emptying device 13 closes the storage space 12 downwards, in particular in the direction of gravity, and is designed to be openable. As a result of opening the emptying device 13, the storage space 12 can be released downwards, so that a content of the storage space 12 can be drained out of the storage space 12 by gravity using the open emptying device 13.

In addition, the construction machine has, for example, one - in this case two - conveyor cylinders C1, C2. Each conveyor cylinder C1, C2 has a variable-volume conveyor chamber 14 for Conveying thick material. The conveying chamber 14 opens into the storage chamber 12. In this case, the two conveying chambers 14 of the two conveying cylinders C1, C2 open into the storage chamber 12 at a distance from one another. The construction machine also has a pipe switch 15, which in this case is S-shaped. The pipe switch 15 delimits a control channel 16 of the construction machine 1 on the inside. The control channel 16 is connected at one end to the fluid channel 3 in a fluid-conducting manner. The pipe switch 15 is adjustable relative to the conveying chambers 14 in such a way that each of the conveying chambers 14 can be connected alternately to the fluid channel 3 and directly, i.e. not via the control channel 16, to the storage chamber 12 in a fluid-conducting manner. The pipe switch 1 is adjustable within the storage chamber 12 relative to the conveying chambers 14. The two conveying chambers 14 can, for example, be connected in a fluid-conducting manner to the fluid channel 3 and the storage chamber 12 in alternating fashion by means of the control channel. In other words: if one of the conveying chambers 14 is connected to the fluid channel 3 by means of the control channel 16, the other conveying chamber is connected to the storage chamber 12 in a fluid-conducting manner. If the pipe switch 15 is now adjusted, the other conveying chamber 14 is connected to the fluid channel 3 by means of the control channel 16 and, accordingly, the conveying chamber previously connected to the fluid channel 3 is connected to the storage chamber 12. This can be repeated periodically. Only one conveying chamber 14 is ever connected to the fluid channel 3 by means of the control channel 16, with the other conveying chamber 14 being connected to the storage chamber 12. During conveying operation of the construction machine 1, the conveying volumes of the volume-variable conveying chambers 14 can be varied in opposite directions, synchronized with the periodic pivoting of the pipe switch 15. In this way, the thick material stored in the storage chamber 12 can first be sucked in by means of the conveying chambers 14 and then conveyed outwards via the pipe switch 15 through the fluid channel 3 in the conveying direction F.

The construction machine 1 has, for example, a further flushing device 17 through which the flushing liquid S can flow. In the flushing operation of the construction machine 1, at least one further liquid jet B2 of flushing liquid S can be formed at least partially within the storage space 12 of the construction machine 1 for storing thick material by means of the further flushing device 17. The liquid jet B2 can be formed entirely in the storage space 12. For this purpose, the further flushing device 17 can protrude into the storage space. In particular, the flushing device 17 can protrude into the storage space 12 from an external environment. Alternatively, it is also conceivable for the flushing device 17 to be arranged outside the storage space 12 and for the further liquid jet B2 to be able to be formed into the storage space 12 from the outside. For example, the further flushing device 17 is arranged on a vertically upper side of the construction machine 1, in particular on an upper opening of the storage container 10.

At least one volume-variable conveying chamber 14 of the construction machine has - as already mentioned - a mouth opening 18, at which the conveying chamber 14 merges into the storage chamber 12. In the present case, both conveying chambers 14 each have a mouth opening 18, at which the two conveying chambers merge into the storage chamber 12 at a distance from one another. The two mouth openings 18 of the conveying chambers 14 are in the present case horizontally spaced from one another and arranged vertically at the same height. The conveying chambers 14 are, for example, horizontally extended. The conveying chambers 14 can be parallel. The at least one further liquid jet B2 can be formed into the mouth opening 18. The further liquid jet B2 can therefore be directed at the mouth opening 18. The further liquid jet B2 can aim into the mouth opening 18. Alternatively or additionally, the at least one further liquid jet B2 can be formed into at least one corner of the storage chamber 12. Such a corner can be rounded or bevelled. The storage space 12 can have a rectangular cross-section. The at least one further liquid jet B2 can be formed into an inner edge of the storage space 12, with the inner edge forming a corner of the storage space 12. The inner edge can be rounded or bevelled. In the present case, a separate further nozzle device 20 of the further flushing device 17 is present for each mouth opening 18. Alternatively or additionally, a separate further nozzle device 20 can be present for each corner or inner edge. At least one further liquid jet B2 can be formed by means of each of these nozzle devices 20. In particular, an entire inner surface of the storage space 12 can be irradiated, in particular exposed, with flushing liquid by means of the further flushing device 17 and the at least one further liquid jet B2. The rinsing liquid S can be supplied to the rinsing device 4 and alternatively or additionally to the further rinsing device 17 with a liquid pressure of 3 bar to 250 bar, in particular from 15 bar to 25 bar. The rinsing device 4 and the further rinsing device 17 can be supplied with rinsing liquid S in the manner of a parallel connection. A controllable valve device can be provided which can be switched over so that either the rinsing device 4 or the further rinsing device 17 or both rinsing devices 4, 17 can be supplied with rinsing liquid S.

For example, the additional flushing device 17 is mounted on the storage container 10 so that it can move relative to the storage container 10 in such a way that the additional flushing device 17 can be removed from the storage chamber 12 for filling the storage chamber 12 with thick material for the conveying operation and can be positioned on the storage chamber 12 for the flushing operation. For example, the additional flushing device 17 can be pivotally mounted on the storage container 10 so that the additional flushing device 17 can be folded away upwards for filling the storage chamber 12 with thick material. For the flushing operation, the additional flushing device 17 is for example, above and - alternatively or additionally - at least partially in the storage space 12. In the present case, the further flushing device 17 can be folded down in the direction of the storage space 12 for the flushing operation in order to assume its flushing operation position shown in the figures.

The construction machine 1 after the Fig. 1 to 4 and 9 and 10 is retrofitted, for example, by means of a retrofit kit according to the invention. The retrofit kit is intended for a starting construction machine for conveying thick material. The starting construction machine already has a pressure nozzle 2, wherein the pressure nozzle 2 has a fluid channel 3 that is open to an external environment of the starting construction machine. During conveying operation of the starting construction machine, thick material flows through the fluid channel 3 in a conveying direction F. The retrofit kit has the flushing device 4. The retrofit kit can have at least one of the coupling devices 19. In addition, the retrofit kit can have the further flushing device 17. In other words: the starting construction machine can be a conventional construction machine that can be retrofitted to a construction machine 1 according to the invention by means of the retrofit kit.

A method according to the invention for a flushing operation of the construction machine 1, which for example has a retrofit kit according to the invention, provides that the coupling devices 19 are coupled to one another. The coupling devices 19 are coupled to one another in order to mount the flushing device 4 on the pressure nozzle 2. According to the method, the flushing device 4 is supplied with flushing liquid S, for example after the flushing device 4 has been mounted on the pressure nozzle 2. According to the method, the at least one liquid jet B1 is formed in the fluid channel 3, in particular against the conveying direction F, by means of the flushing device 4. The at least one liquid jet B1 is formed in such a way that the fluid channel 3 is flushed with flushing liquid S. The liquid jet B1 can be formed as a result of the flushing device 4 being supplied with flushing liquid S. The liquid jet B1 can be directed against an inner side of the pressure nozzle 2, which delimits the fluid channel 3.

For example, according to the method, a storage space 12 of the construction machine 1 is opened downwards. The opening of the storage space 12 can be carried out by means of the emptying device 13 of the construction machine 1. For example, the storage space 12 is opened downwards before and/or during the formation of the liquid jet B1. The opening of the storage space 12 serves to drain the thick material stored in the storage space 12 and - alternatively or additionally - flushing liquid S. In this case, in at least one of the volume-variable Thick material taken up in the conveying chambers 14 of the construction machine can be drained into the storage chamber 12 by minimizing the volume of the conveying chamber 14. To minimize the volume of the conveying chamber 14, the conveying piston 21 of the associated conveying cylinder C1, C2 can be adjusted relative to the storage chamber 12. Thick material taken up in the associated conveying chamber 14 can therefore be pushed into the storage chamber 12 by means of the conveying piston 21. The thick material pushed out of the conveying chamber 14 can then be drained from the storage chamber 12 via the emptying device 13.

For example, according to the method, the further flushing device 17 of the construction machine 1 is supplied with flushing liquid S. In this case, by means of the further flushing device 17, at least one further liquid jet B2 of flushing liquid S is formed at least partially within the storage space 12 of the construction machine 1 for storing thick material. In this case, the at least one further liquid jet B2 can be formed into the mouth openings 18 of the conveying spaces 14 and - alternatively or additionally - into corners and/or edges of the storage space 12.

According to the method, the at least one liquid jet B1 and the at least one further liquid jet B2 are formed, for example, one after the other or simultaneously. For example, while the at least one liquid jet B1 is formed by means of a nozzle device 6 of the flushing device 4, the nozzle device 6 is adjusted relative to the coupling device 19 of the flushing device 4. For example, when forming the liquid jet B1, the flushing device 4 is adjusted against the conveying direction F and/or within the fluid channel 3 relative to the coupling device 19 of the flushing device 4. The adjustment of the nozzle device 4 can take place depending on a liquid pressure that drops at the nozzle device 6 when forming the at least one liquid jet B1.

For example, during the formation of the at least one liquid jet B1, the pipe switch 15 of the construction machine 1 is adjusted relative to the at least one volume-variable conveying chamber 14 of the conveying cylinder C1, C2 of the construction machine 1. Since the control channel 16 is fluidically connected to the fluid channel 3 at one end, the control channel 16 is also flushed with flushing liquid S when the fluid channel 3 is flushed. The pipe switch 15 can be adjusted relative to the at least one conveying chamber 14 in such a way that the conveying chamber 14 is alternately fluidically connected to the fluid channel 3 and directly to the storage chamber 12 by means of the control channel 16 in such a way that the conveying chamber 14 is alternately flushed with flushing liquid S guided through the control channel 16. The alternating flushing of the conveying chamber 14 can result from the pipe switch 15, in particular in an oscillating manner, is pivoted in order to alternately connect the control channel 16 with the conveying chamber 14 and to separate it from the conveying chamber 14.

For example, according to the method, while the at least one delivery chamber 14 is fluidically connected to the control channel 16, a volume of this delivery chamber 14 is varied. For example, the volume of the delivery chamber 14 can be maximized if this delivery chamber 14 is fluidically connected to the control channel 16. Alternatively or additionally, the volume of the other delivery chamber 14 can be varied, in particular in the opposite direction. In other words: if the volume of one delivery chamber 14 is maximized, the volume of the other delivery chamber 14 can be minimized. The volume of the delivery chambers 14 can be varied, i.e. minimized and/or maximized, by adjusting a delivery piston 21 delimiting the respective delivery chamber 14 of the delivery cylinder C1, C2 having this delivery chamber 14 relative to the fluid channel 3.

Claims (15)

Construction machine (1) for conveying thick material, the construction machine (1) comprising: - a pressure nozzle (2), wherein the pressure nozzle (2) delimits a fluid channel (3) which is open outwards to an external environment of the construction machine (1), wherein the fluid channel (3) is flowed through by thick matter in a conveying direction (F) during a conveying operation of the construction machine (1), - a flushing device (4) through which a flushing liquid (S) can flow, wherein in a flushing operation of the construction machine (1) at least one liquid jet (B1) of flushing liquid (S) can be formed by means of the flushing device (4), - wherein the flushing device (4) and the pressure nozzle (2) have complementary coupling devices (19), - wherein the complementary coupling devices (19) can be coupled to one another in order to mount the flushing device (4) on the pressure nozzle (2) in such a way that the at least one liquid jet (B1) can be formed in the fluid channel (3) during flushing operation, in particular against the conveying direction (F). Construction machine (1) according to the preceding claim, - wherein the flushing device (4) has a nozzle device (6) which can be inserted into the fluid channel (3) for forming the at least one liquid jet (B1), - in particular wherein the nozzle device (6) is adjustable relative to the coupling device (19) of the flushing device (4), in particular depending on a liquid pressure falling via the nozzle device (6) during the formation of the at least one liquid jet (B1). Construction machine (1) according to one of the preceding claims, - wherein, in an assembled state of the flushing device (4), a passage (8) through which flushing liquid (S) can flow is formed between the pressure port (2) and the flushing device (4) for discharging back-flowing flushing liquid (S) into an external environment of the construction machine (1), - in particular wherein the flushing device (4) has a deflection device (9) for deflecting flushing liquid (S) drained through the passage (8). Construction machine (1) according to one of the preceding claims,
wherein the construction machine (1) comprises: - a storage container (10), in particular one which is funnel-shaped at least in some areas, the storage container (10) defining on the inside a storage space (12) of the construction machine (1) for storing thick material, in particular one which is open at the top and can be covered by a cover (11) of the construction machine (1), in particular the construction machine (1) having an emptying device (13) which can be opened and closes the storage space (12) at the bottom, - at least one, in particular two, conveying cylinders (C1, C2), each conveying cylinder (C1, C2) having a volume-variable conveying chamber (14) for conveying thick matter, the conveying chamber (14) opening into the storage chamber (12), and - a pipe switch (15), in particular one of S-shape, wherein the pipe switch (15) delimits a control channel (16) of the construction machine (1) on the inside, wherein the control channel (16) is connected at one end to the fluid channel (3) in a fluid-conducting manner, - wherein the pipe switch (15), in particular within the storage space (12), is adjustable relative to the conveying space (14) such that the conveying space (14) can be alternately connected in a fluid-conducting manner to the fluid channel (3) and, in particular directly, to the storage space (12) by means of the control channel (16). Construction machine (1) according to one of the preceding claims, - wherein the construction machine (1) has a further flushing device (17) through which the flushing liquid (S) can flow, - wherein in the flushing operation of the construction machine (1) by means of the further flushing device (17) at least one further liquid jet (B2) of flushing liquid (S) can be formed at least partially within a storage space (12) of the construction machine (1) for storing thick material. Construction machine (1) according to the preceding claim, - wherein at least one volume-variable conveying chamber (14) of the construction machine (1) has an opening (18) at which the conveying chamber (14) merges into the storage chamber (12), - wherein the at least one further liquid jet (B2) can be formed into the mouth opening (18) and/or into corners of the storage space (12), - in particular, wherein for each mouth opening (18) and/or corner there is a separate further nozzle device (20) of the further rinsing device (17) for forming at least one further liquid jet (B2). Construction machine (1) according to one of the two preceding claims,
wherein the further flushing device (17) is mounted on the storage container (10) so as to be movable, in particular pivotable, relative to the storage container (12) in such a way that the further flushing device (17) can be removed from the storage chamber (10) for filling the storage space (10) with thick material for the conveying operation and can be positioned on, in particular above and/or at least partially in, the storage space (10) for the flushing operation. Retrofit kit for a starting construction machine for conveying thick material, wherein the starting construction machine has a pressure nozzle (2), wherein the pressure nozzle (2) has a fluid channel (3) open to an external environment of the starting construction machine, wherein the fluid channel (3) is flowed through by thick material in a conveying direction (F) during a conveying operation of the starting construction machine, - wherein the initial construction machine can be retrofitted by means of the retrofit kit to a construction machine (1) according to one of the preceding claims, wherein the retrofit kit has the flushing device (4), in particular wherein the retrofit kit has at least one of the coupling devices (19), - in particular, wherein the initial construction machine can be retrofitted by means of the retrofit kit to a construction machine (1) according to one of the three preceding claims, wherein the retrofit kit has the further flushing device (17). Method for flushing a construction machine (1) according to one of claims 1 to 7, in particular comprising a retrofit kit according to the preceding claim, wherein according to the method: - the coupling devices (19) are coupled together to mount the flushing device (4) on the pressure port (2), - the flushing device (4) is supplied with flushing liquid (S), and - by means of the flushing device (4) the at least one liquid jet (B1) is formed in the fluid channel (3), in particular against the conveying direction (F), so that the fluid channel (3) is flushed with flushing liquid (S). Method according to the preceding claim, in particular for a construction machine according to claim 4, - wherein a storage space (12) of the construction machine (1), in particular by means of an emptying device (13) of the construction machine (1), is opened downwards, in particular before and/or during the formation of the liquid jet (B1) is used to drain thick matter and/or rinsing liquid (S) stored in the storage chamber (12), - in particular, wherein thick material received in at least one volume-variable conveying chamber (14) of the construction machine (1) is discharged into the storage chamber (12) by minimizing the volume of the conveying chamber (14), in particular by adjusting a conveying piston (21) of a conveying cylinder (C1, C2) relative to the storage chamber (12). Method according to one of the two preceding claims, in particular for a construction machine according to claim 5, - wherein a further flushing device (17) of the construction machine (1) is supplied with flushing liquid (S), - wherein by means of the further flushing device (17) at least one further liquid jet (B2) of flushing liquid (S) is formed at least partially within a storage space (12) of the construction machine (1) for storing thick material, - in particular wherein at least one volume-variable conveying chamber (14) of the construction machine (1) has a mouth opening (18) at which the conveying chamber (14) merges into the storage chamber (12), in particular wherein the at least one further liquid jet (B2) is formed into the mouth opening (18) and/or in corners of the storage chamber (12). Method according to the preceding claim,
wherein the at least one liquid jet (B1) and the at least one further liquid jet (B2) are formed sequentially or simultaneously. Method according to one of the four preceding claims,
wherein, while the at least one liquid jet (B1) is formed by means of a nozzle device (6) of the flushing device (4), the nozzle device (6) is adjusted relative to the coupling device (19) of the flushing device (4), in particular counter to the conveying direction (F) and/or within the fluid channel (3), in particular depending on a liquid pressure falling at the nozzle device (6) during the formation of the at least one liquid jet (B1). Method according to one of the five preceding claims,
wherein during the forming of the at least one liquid jet (B1) - a pipe switch (15), in particular an S-shaped one, of the construction machine (1) relative to at least one volume-variable conveying chamber (14) of a conveying cylinder (C1, C2) of the construction machine (1), wherein the pipe switch (15) delimits a control channel (16) of the construction machine (1) on the inside, wherein the control channel (16) is connected at one end to the fluid channel (3) in a fluid-conducting manner such that when the fluid channel (3) is flushed, the control channel (16) is also flushed with flushing liquid (S), - in particular wherein the pipe switch (15) is adjusted relative to the at least one conveying chamber (14) in such a way that the conveying chamber (14) is alternately connected by means of the control channel (16) to the fluid channel (3) and, in particular directly, to a storage chamber (12) of the construction machine in such a way that the conveying chamber (14) is alternately flushed with flushing liquid (S) guided through the control channel (16). Method according to the preceding claim, - wherein, while the at least one conveying chamber (14) is fluidically connected to the control channel (16), a volume of this conveying chamber (14) is varied, in particular maximized, and/or a volume of at least one further conveying chamber (14) is varied, in particular in the opposite direction, in particular minimized, - in particular wherein the volume of the delivery chambers (14) is varied, in particular minimized and/or maximized, by adjusting a delivery piston (21) delimiting the respective delivery chamber (14) of the delivery cylinder (C1, C2) having this delivery chamber (14) relative to the fluid channel (3).

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