EP2699742B1 - Arrangement and method for manufacturing of concrete components - Google Patents

Description

The invention relates to an arrangement and a method for the production of concrete components using liquid concrete.

In prefabricated construction and construction arrangements for filling formwork with liquid concrete are known, which have a connected to a concrete feed tank concrete pump and a guided via a distribution boom conveyor line, wherein the feed line at its end in a down to the mast tip, dipping into the formwork Downpipe opens and the concrete distribution boom and the concrete pump via control elements of a remote control semi-automatic actuated. In order to achieve a uniform compression of the concrete without segregation phenomena and air intake, there the downpipe performs over a part of the formwork height a stroke movement at a defined distance above or below the liquid level in the formwork. The height of the exit point of the downpipe within the formwork is determined automatically by measuring the filling volume or by level measurement. There are a variety of applications in which the formwork with a distribution boom of this kind is not achievable or in which a distribution boom for the purpose of filling is not available. In these cases, it is often possible to fill the formwork with concrete buckets, which are fed with fresh concrete at a concrete mixing plant and transported to the formwork via a crane distributor or a monorail conveyor. This procedure leads due to the discontinuous filling and the separation of the concrete during the bucket transport, especially in exposed concrete surfaces to poor quality in the precast concrete. In addition, the production speed leaves much to be desired there

JP 7 102893 A describes a device and a method for premixing and concreting the lining material for tunnels and discloses all the features of the introductory part of claim 1.

Proceeding from this, the present invention seeks to develop an arrangement for the production of concrete components with a control valve, which allows with the support of a liquid concrete pump and a conveyor line connected to this continuous filling a formwork without segregation phenomena with uniform concrete quality even over large concreting heights. Another object is the advantageous use of such arrangement in the manufacture of concrete components using liquid concrete.

To solve this problem, the feature combinations specified in the claims 1 and 11 are proposed. Advantageous embodiments and modifications of the invention will become apparent from the dependent claims.

The invention is based primarily on the idea to provide in the arrangement according to claim 1, a control valve for liquid concrete, having a housing with an inlet nozzle, an outlet nozzle and a connecting piece, in which a control member for reversing a liquid concrete flow is arranged. A special feature of the control valve according to the invention is that the outlet nozzle is communicated in an open position of the control member to the inlet nozzle and shut off in a closed position of the control member relative to the inlet nozzle, and that the connecting piece both in the open position and in the closed position of the control member with the inlet nozzle communicated. This ensures that the liquid concrete introduced into the housing under pressure via the inlet connection can be temporarily discharged via the outlet connection into a formwork and that the connecting piece is always supplied with liquid concrete for further transport to other control valves or exit points both with open and closed outlet nozzle.

A preferred embodiment of the invention provides that the control member is designed as in an aligned with the outlet nozzle cylinder between the output nozzle against the inlet port shut-off closed position and the outlet nozzle relative to the inlet nozzle releasing open position movable piston and that the connecting piece both in the open position also communicates with the input port in the closed position of the piston. This can be achieved in particular by the fact that the outlet nozzle is angled relative to the inlet nozzle, that the connecting piece is aligned with the inlet nozzle, and that the piston engages sealingly in its closed position in the outlet nozzle and in its open position so pulled out of this, that he Passage from the inlet nozzle to the outlet nozzle and to the connecting piece releases. In addition, the piston has a transverse to its direction of passage breakthrough, which releases the passage from the inlet nozzle to the passage in the closed position of the piston. The control member can be operated either manually or by hydraulic, pneumatic or electromechanical means. Manufacturing technology, it is advantageous if the cylinder is connected to a cylinder flange of the housing. In this case, the cylinder containing the control member can be manufactured separately from the housing and then flanged or coupled by means of a pipe coupling.

Control fittings of the type described above are used according to the invention in an assembly for the production of concrete components using liquid concrete, the arrangement comprises a formwork, which is bounded by at least one vertically oriented formwork wall by the control valve with its inlet nozzle and its connecting piece to an input side with a conveyor connected to liquid concrete pump is connected, and wherein the control valve opens with its outlet nozzle in the formwork to be filled. To get a smooth concrete surface when finished, It is advantageous if the outlet nozzle is aligned with its end face with the interior of the shuttering wall and the piston in the closed position with its bottom reaches to the front side of the outlet nozzle. As a result, the end face of the outlet nozzle and the bottom of the piston forms a smooth boundary surface aligned with the interior of the shuttering wall.

The invention is therefore, according to claim 1, an assembly for the production of concrete components using liquid concrete, with a formwork, which is bounded by at least one vertically oriented formwork wall, and with a liquid concrete pump comprising a device for introducing liquid concrete into the formwork, wherein on the outside of the formwork wall, an inlet side connected to the liquid concrete pump conveyor line is arranged, which has at least two superimposed, interconnected via a connecting line horizontal strands, wherein in the horizontal strands in each case at least one control valve is arranged, which an inlet nozzle, an outlet nozzle and a connecting piece has, each control valve is coupled with its inlet nozzle and its connecting piece in the associated horizontal strand and hindu with its outlet nozzle through an opening of the shuttering wall rch opens into the formwork, wherein the outlet nozzle is communicated in an open position of an arranged inside the control valve control member with the inlet nozzle and shut off in a closed position of the control member relative to the inlet nozzle, and wherein the connecting piece both in the open position and in the closed position of the control member communicates with the inlet nozzle.

In a particularly advantageous arrangement of this type are the control valves, separately controllable. Depending on the length of the formwork and fluidity of the liquid concrete to be introduced, at least two control valves can be arranged in the horizontal strands at a lateral distance from each other. In the case of high formworks, several horizontal strands can also be connected to one another via connecting lines in a meandering manner. At the end of each horizontal strand a gate valve is expediently arranged, which makes it possible to continue the insertion process from bottom to top and successively incorporate the respectively arranged horizontal strands in the delivery line.

With these measures, according to claim 11, a process for the production of concrete components using liquid concrete in an arrangement according to the invention is possible, wherein the liquid concrete is continuously pumped along the several übereinanderanderlicher, interconnected via the connecting lines horizontal strands of the delivery line, the horizontal strands successively from below open towards the shuttering for the liquid concrete at least one exit point and then closed again, the horizontal strands are opened successively for filling the liquid concrete passage and the horizontal strands are left open with already closed starting points for the liquid concrete passage to the subsequent horizontal strands.

The distances between the individual horizontal strands are dimensioned so that the height of fall of the liquid concrete in the formwork remains small enough that there is no noticeable demixing phenomenon and a uniform compaction of the concrete.

Fig. 1

eine Draufsicht auf eine Steuerarmatur;

Fig. 2

eine Seitenansicht der Steuerarmatur nach Fig. 1;

Fig. 3

einen Schnitt entlang der Schnittlinie A-A der Fig. 2;

Fig. 4a und b

eine schaubildliche geschnittene Darstellung einer abgewandten Ausführungsform der Steuerarmatur in Offenstellung und in Schließstellung des Schließorgans;

Fig. 5a, b und c

Prinzipskizzen für den Anschluss der Steuerarmatur an eine Schalungswand in Offenstellung des Steuerorgans im Befüllungszustand über den Ausgangsstutzen, in Schließstellung des Steuerorgans mit durch den Kolbendurchbruch hindurchströmendem Flüssigbeton, und in Schließstellung des Steuerorgans mit in der Förderleitung zurückströmendem Reinigungswasser;

Fig. 6a und b

ein Schema mit zwei in übereinander befindlichen Horizontalsträngen der Förderleitung angeordneten Steuerarmaturen beim Befüllvorgang über den unteren Horizontalstrang und über den oberen Horizontalstrang;

Fig. 7a und b

eine weitere, gegenüber Fig. 1 bis 4 abgewandelte Ausführungsform der Steuerarmatur in schaubildlicher und in geschnittener Darstellung.

In the following the invention will be explained in more detail with reference to the embodiments schematically illustrated in the drawing. Show it

Fig. 1

a plan view of a control valve;

Fig. 2

a side view of the control valve according to Fig. 1 ;

Fig. 3

a section along the section line AA of Fig. 2 ;

Fig. 4a and b

a perspective sectional view of a remote embodiment of the control valve in the open position and in the closed position of the closing member;

Fig. 5a, b and c

Schematic diagrams for the connection of the control valve to a formwork wall in the open position of the control member in the filling state via the outlet nozzle, in the closed position of the control member with hindurchströmendem through the piston breakthrough Liquid concrete, and in the closed position of the control member with back in the feed line cleaning water;

Fig. 6a and b

a scheme with two arranged in superimposed horizontal strands of the delivery line control valves during the filling process on the lower horizontal strand and on the upper horizontal strand;

Fig. 7a and b

another, opposite Fig. 1 to 4 modified embodiment of the control valve in perspective and in a sectional view.

The control valve 10 shown in the drawing is designed as a two-way cross-fitting. It is intended for use in the inventive arrangement. It comprises a housing 14, which has an inlet connection 16, an outlet connection 18 and a passage connection 20, and in which a control element 22 is displaceably arranged. A special feature of the control valve 10 is that the outlet port 18 communicates with the inlet port 16 in an open position of the control member 22 and is shut off in a closed position of the control member 22 relative to the inlet port 16, and that the connecting piece 20 both in the open position and in the Closed position of the control member 22 communicates with the input port 16.

The control member 22 is as in a aligned with the output nozzle cylinder 24 between the output port 18 against the inlet port 16 shut-off closed position ( Fig. 4b ) and a the outlet nozzle 18 relative to the inlet port 16 releasing open position ( Fig. 4a ) movable piston 22 'is formed, wherein the connecting piece 20 both in the open position ( Fig. 4a ) as well as in the closed position ( Fig. 4b ) of the piston communicates with the input port. For this purpose, the outlet nozzle 18 is angled relative to the inlet nozzle 16, while the connecting piece 20 is aligned with the inlet nozzle 16. The piston 22 'penetrates in its closed position sealingly into the outlet nozzle, while it is pulled out in its open position so that it releases the passage from the inlet nozzle 16 to the outlet nozzle 18 and the passage stub 20. Further, the piston 22 'a directed transversely to its direction of breakthrough 26, the passage in the closed position of the piston 22' from the inlet nozzle 16 to the connecting piece 20 releases. At the in Fig. 1 to 4a shown embodiment, the piston 22 'via a two-sided controllable hydraulic cylinder 28 or pneumatic cylinder can be actuated. The cylinder is in the case of Fig. 1 to 3 via a pipe coupling 30 to a cylinder flange 32 of the housing 16 can be coupled so that it is aligned with the outlet port 18.

This in Fig. 7a and b The embodiment shown differs from the exemplary embodiments Fig. 1 to 4 in that the hydraulic means for actuating the piston 22 'in the form of two hydraulic cylinders 28' are arranged laterally next to the cylinder 24 and are connected to one another at their piston rods 51 by a cross member 52 engaging transversely through the piston 22. The cylinder 24 is provided in its rear region with axially parallel slots 60 for the passage of the traverse 52. With these measures it is achieved that the overall length with which the control fitting protrudes beyond the formwork, compared to the embodiments according to Fig. 1 to 4 is shortened.

In the open position, the opening 26 is located inside the cylinder 24, while in the closed state of the piston 22 'it forms a through-passage between the inlet connection 16 and the through connection 20.

How out Fig. 5a to 5c can be seen, the control valves 10 with its input port 16 and its passage piece 20, for example be connected by means of pipe couplings to a conveyor line 12, which is laid on the outside of a limited by a formwork wall 34 formwork 36. The delivery line 12 is connected on the input side to the pressure side of a concrete pump. Next 34 openings 38 are arranged at defined locations of the shuttering wall, is connected to the respective one of the control valves 10 with its outlet port 18.

How out Fig. 5a can be seen, the incoming under a discharge pressure liquid concrete with open control member 20 of the control valve 10 can be introduced in the direction of arrow 42 via the outlet port 18 in the formwork 36. Since the inlet port 16 also communicates with the passage 20, passes during the Einbringvorgangs and liquid concrete in the direction of arrow 44 via the connecting piece 20 in the further conveying line 12. In the closed state of the control member according to Fig. 5b the outlet port 18 is closed against thick matter passage in the formwork 36, so that the incoming liquid concrete is conveyed in the direction of the arrow 44 through the opening through only in the further conveying line 12 to a further introduction point. At the end of a filling process, according to Fig. 5c all control elements 22 brought into their closed position and cleaned in a cleaning run in the direction of arrow 46 with water and possibly with plug-like or sponge-like cleaning bodies, which are introduced via an end-input slot.

Like from the Fig. 6a and b can be seen, it is necessary for a uniform filling of the formwork 36 according to the invention that the laid on the outside of the formwork wall 34 conveying line 12 a plurality of superimposed horizontal strands 48 ', 48 ", which are preferably connected via vertical connecting lines 50 meandering together In such an arrangement, the liquid concrete is pumped continuously through the delivery line 12, the horizontal strands 48 ', 48 "successively from bottom to top to the formwork 36 for the liquid concrete entry at least one Output port 18 are opened and then closed again, and wherein the horizontal strands 48 ', 48 "open as the filling successively for the liquid concrete passage and the horizontal strands 48' remain open with already closed outlet port 18 for the liquid concrete passage to the subsequent horizontal strands 48". In the in Fig. 6a shown state, the control valve in the first horizontal strand 48 'open, so that via the outlet port 18 liquid concrete 40 passes into the lower part of the formwork 36. In this switching state, the upper horizontal leg 48 "is expediently blocked against liquid concrete access via a gate valve (not shown) as soon as the liquid concrete level has risen to the outlet port 18 of the control armature 10 in the lower horizontal leg 48 ', the control element 12 of the relevant control armature 10 is brought into its closed position, in which the outlet nozzle 18 is closed in alignment with the formwork 36 and the passage is released via the piston opening 26. At the same time, the optionally present blocking member is opened at the end of the lower horizontal strand 48 ', so that liquid concrete is conveyed via the vertical connecting line 50 to the upper horizontal strand 48 "can get. From there, liquid concrete passes via the already open outlet port 18 of the control armature located in the upper horizontal leg 48 "into the upper region of the formwork 36 until it is filled to its outlet port 18. If more horizontal strands are arranged above this, this process is repeated until the Depending on the viscosity of the liquid concrete 40 and the width of the formwork 36, more or fewer control fittings 10 must be arranged along each horizontal strand 48 ', 48 "in order to ensure uniform filling.

At the end of each filling operation, the above-described cleaning run is started with the control valves 10 closed.

With these measures, it is possible to fill a concrete formwork 36 continuously with liquid concrete, without it at any point to undesirable separation phenomena and air bubbles.

It is understood that arrangement with control valve 10 according to the invention can also be used for the continuous filling of a plurality of containers and for producing a plurality of precast concrete parts.

LIST OF REFERENCE NUMBERS

10

control valve

12

delivery lines

14

casing

16

inlet connection

18

outlet connection

20

Passage nozzle

22

control element

22 '

piston

24

cylinder

26

breakthrough

28.28 '

hydraulic cylinders

30

pipe coupling

32

cylinder flange

34

formwork wall

36

formwork

38

openings

40

liquid concrete

42,44,46

arrows

48 ', 48 "

Horizontal lines

50

interconnectors

51

piston rods

52

traverse

60

axially parallel slots

Claims (11)

1. Arrangement for producing concrete structural parts using liquid concrete, with a formwork (36), which is delimited by at least one vertically oriented formwork wall (34), and with a device comprising a liquid concrete pump and intended for introducing liquid concrete into the formwork, characterized in that a conveying line (12) connected on the inlet side to the liquid concrete pump is arranged on the outer side of the formwork wall (34) and has at least two horizontal sections (48', 48") which are arranged above one another and connected to one another via a connection line (50), in that at least one control fitting (10) is arranged in each of the horizontal sections and has an inlet port (16), an outlet port (18) and a through-port (20), in that each control fitting (10) is coupled by way of its inlet port (16) and its through-port (20) into the associated horizontal section (48', 48") and opens by way of its outlet port (18) through an opening (38) in the formwork wall (34) into the formwork (36), in that the outlet port (18) communicates with the inlet port (16) in an open position of a control member (22) arranged in the interior of the control fitting (10) and is shut off with respect to the inlet port (16) in a closed position of the control member (22), and in that the through-port (20) communicates with the inlet port (16) both in the open position and in the closed position of the control member (22).
2. Arrangement according to Claim 1, characterized in that the control member (22) is designed as a piston (22') which is movable in a cylinder (24), which is aligned with the outlet port (18), between a closed position in which it shuts off the outlet port (18) with respect to the inlet port (16) and an open position in which it opens the outlet port (18) with respect to the inlet port (16), and in that the through-port (20) communicates with the inlet port (16) both in the open position and in the closed position of the piston (22').
3. Arrangement according to Claim 2, characterized in that the outlet port (18) is bent at an angle with respect to the inlet port (16), in that the through-port (20) is aligned with the inlet port (16), and in that the piston (22') in its closed position engages sealingly in the outlet port (18) and in its open position is drawn out therefrom such that it opens up the passage from the inlet port (16) to the outlet port (18) and to the through-port (20), wherein the piston (22') has a through-opening (26) which is directed transversely with respect to its displacement direction and which, in the closed position of the piston (22'), opens up passage from the inlet port (16) to the through-port (20).
4. Arrangement according to one of Claims 1 to 3, characterized in that the control member (22) can be actuated manually or with hydraulic, pneumatic or electromechanical means (28).
5. Arrangement according to one of Claims 2 to 4, characterized in that the cylinder (24) is connected to a cylinder flange (32) of the control fitting (10).
6. Arrangement according to one of Claims 1 to 5, characterized in that the horizontal sections (48', 48") arranged above one another are connected to one another in pairs via a respective vertical connection line (50).
7. Arrangement according to Claim 6, characterized in that at least two control fittings (10) are arranged at a lateral distance from one another in at least one of the horizontal sections (48', 48").
8. Arrangement according to Claim 6 or 7, characterized in that the control fittings (10) in the individual horizontal sections (48', 48") can be activated separately from one another.
9. Arrangement according to one of Claims 6 to 8, characterized in that a plurality of horizontal sections (48', 48") are connected to one another in meandering fashion via preferably vertical connection lines (50).
10. Arrangement according to one of Claims 1 to 9, characterized in that an input sluice for introducing plug-like or sponge-like cleaning bodies is arranged at one end of the conveying line (12).
11. Method for producing concrete structural parts using liquid concrete in an arrangement according to one of Claims 1 to 10, characterized in that the liquid concrete (40) is pumped continuously along the plurality of horizontal sections (48', 48") of the conveying line (12) which are situated above one another and connected to one another via the connection lines (50), in that the horizontal sections (48', 48") are successively opened from bottom to top towards the formwork (36) for the liquid concrete (40) at at least one outlet point and then closed again, in that, with progressive filling, the horizontal sections (48', 48") are successively opened for liquid concrete passage, and in that the horizontal sections (48') with already closed outlet points are left open for liquid concrete passage to the subsequent horizontal sections (48").

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