ES2958342T3 - Device for transporting thick materials - Google Patents

Abstract

The present invention relates to a thick matter conveying device, in particular for transporting concrete, comprising at least one conveying cylinder, by means of which thick matter can be transported from a thick matter collecting container to a transport pipe. According to the invention, the conveyor cylinder is attached to the thick material collection container in such a way that the tensile forces of the conveyor cylinder acting during the transport of thick material are transferred to the thick material collection container via a positive connection and are They transmit opposite compression forces. Through another connection it is transferred to the thick matter collection container. (Automatic translation with Google Translate, without legal value)

Description

DESCRIPTION

Device for transporting thick materials

The present invention refers to a device for transporting thick materials according to the general concept of claim 1.

To transport thick materials, such as concrete, special thick material pumps are often used, which pump the thick materials from a thick material collecting container into a supply line using hydraulically driven supply cylinders. In this type of pump, the supply cylinders have an opening at one end that is connected to a corresponding suction opening in the coarse material collection container casing so that the coarse material can be sucked in and then pumped into the delivery line. supply via one stroke of the pump. During the operation of these coarse material pumps, tensile and compressive forces occur at the connection points of the supply cylinders in the coarse material collection container. It is characteristic that the tensile forces acting outwards are greater than the compressive forces acting in the opposite direction (towards the coarse material collection container).

In the solutions known from the state of the art, the supply cylinders are usually connected to the thick material collection container and the water tank by turnbuckles or flange connections, whereby both high tensile forces and low compression forces are met. transmitted in the same way through the same threaded joints. The disadvantage of this is that the turnbuckles have a high dead weight, while the flange connections on the outside of the thick material collection container (and in the water tank) take up a lot of space, i.e. they take up more installation space. An example in the state of the art is application EP0854285.

The object of the present invention is to improve the connection of the supply cylinders with the collection container for thick materials.

This object is solved according to the invention by a thick material transport device with the characteristics of claim 1. Consequently, a thick material transport device is proposed, in particular for the transport of concrete, comprising at least one supply cylinder by which coarse material can be transported from a coarse material collection container to a supply line. According to the invention, the supply cylinder is fixed to the coarse material collection container in such a way that the tensile forces of the supply cylinder acting during the transport of the coarse material are transmitted to the coarse material collection container through a connection due to complementarity of shape and the compression forces that act in the opposite direction through another connection, that is, a connection different from the connection due to complementarity of shape mentioned above.

At the connection of the at least one transport cylinder according to the invention, the operating loads are transmitted differently than in known devices. While low compressive forces are still transmitted via a threaded connection, for example, a connection based on a form fit is provided for the transmission of higher tensile forces. In addition to a slim design, this allows the use of a connection designed for lower compressive forces, as higher tensile forces are introduced by other means through form fit. In this case, the use of heavy tensioners can be dispensed with.

In general, the present invention provides a stable connection at the attachment point(s) of the delivery cylinder(s), which ensures safe transmission of high forces during the transport operation and also allows a simple solution of the connection at the service side. Additionally, this type of connection offers better voltage profiles.

Advantageous embodiments of the invention result from the claims and the description below.

In one embodiment, the other connection is provided to be a threaded connection, a bolt connection or a connection by complementarity of shape by means of a securing element or a fixing ring. Combinations of these connection types are also conceivable for the additional connection. Preferably, the other connection is not located on an external side of the coarse material collection container. In particular, the additional connection is not a flange connection on the outside of the thick material collection container. By eliminating flanged bolted connections, which take up a lot of installation space, a more compact design can be achieved, allowing the use of, for example, larger supply cylinders. To do this, the element that creates the positive fit with the housing of the coarse material collection container can be screwed to the coarse material collection container.

In another embodiment, it is provided that the supply cylinder comprises a cylinder housing with a cylinder opening which is connected to a suction opening formed in a housing of the coarse material collecting container; wherein the connection due to complementarity of shape is preferably located in the suction opening or on it (in the area of the suction opening). In particular, the cylinder housing can be screwed to the housing of the coarse material collecting container at the suction opening or at its height. Through the suction opening, the coarse material can be sucked out of the coarse material collecting container and returned under pressure, in particular, via a bypass tube into a supply line. In this way, the suction opening also functions alternatively as a pressure opening.

In another embodiment, provision is made for the cylinder housing to be at least partially accommodated in the suction opening. Thus, the cylinder casing is introduced totally or partially through the suction opening. Preferably, it reaches a wear plate mounted inside the coarse material collection container. This allows the material to be transported to pass from the supply cylinder directly through the wear plate to the supply line or to a preferably provided bypass tube, without disturbing edges or throttling effect. In this case, it is advantageous to dispense with the use of intermediate rings.

In a further embodiment, provision is made for the supply cylinder to be connected via a stop to a housing of the coarse material collection container by way of complementarity of shape. The stop can be formed directly into the cylinder housing, for example as a welded or one-piece boss or collar, or it can be made by a separate component. The shape adjustment created by the stop acts in the direction of the acting tensile forces, i.e. starting from the shell of the coarse material collection container towards the outside.

In another embodiment, a counterstop is provided in the housing of the coarse material collecting container, which interacts with the stop by complementarity of shape to block a movement of the supply cylinder out of the suction opening, where the counterstop is formed preferably within the suction opening or formed across the inner side of the coarse material collection container. The countertop can be formed, for example, by a groove or edge inside the suction opening or simply result from the edge in the transition area/mouth of the suction opening inside the coarse material collection container.

In another embodiment, it is provided that the stop is accommodated in a recess, in particular in a groove, of the cylinder housing and is preferably removable from the supply cylinder. The stop is a separate component of the cylinder housing that can be inserted into the recess of the cylinder housing to create the connection by complementarity of shape. This simplifies the assembly and maintenance of the delivery cylinder of the device according to the invention.

In another embodiment, provision is made for the stop to be firmly connected to the housing of the coarse material collection container, in particular by screwing. This connection consists, in particular, of the aforementioned "other connection", which transmits the pressure forces that are generated during transport to the shell of the coarse material collection container. By screwing the stop, a protected and space-saving threaded connection can be made. In particular, the screws are recessed in a corresponding recess, so that they do not protrude from the housing.

In another embodiment, it is provided that the stop is designed as an insert ring, which is arranged inside the suction opening and is accommodated in a groove that extends at least partially around the cylinder housing, where in the opening of suction, an at least partially circumferential edge is made as a countertop that forms a fit with the stop. The insert ring can be easily mounted or replaced if necessary.

In another embodiment, provision is made for the insertion ring to be firmly connected to the countertop, in particular by screwing. Alternatively or additionally it may be provided that the supply cylinder is held in the suction opening by a component mounted on the inner side of the coarse material collection container, in particular a wear plate with an opening covering the suction opening. In the latter case, the wear plate can serve as a stop, which is screwed to the inside of the housing of the coarse material collection container.

In another embodiment, provision is made for the suction opening to be designed in such a way that the insertion ring for mounting in the cylinder housing can be inserted into the suction opening from the inside of the coarse material collection container. For installation, the supply cylinder is inserted from the outside into the suction opening and secured from the inside of the coarse material collection container by inserting the insertion ring. Then, depending on the design of the other connection, the insert ring, for example, is screwed to the housing of the coarse material collection container at specially provided points or the wear plate, which fixes the supply cylinder, is screwed in the suction opening, so that the supply cylinder is secured against sliding inwards.

In another embodiment, it is provided that a wear plate with an opening covering the suction opening is mounted on the inner side of the coarse material collecting container; wherein the supply cylinder extends through the suction opening to the wear plate. This allows the material to be transported to pass from the supply cylinder directly through the wear plate to the supply line or to a preferably provided bypass tube, without disturbing edges or throttling effect.

In another embodiment, it is provided that two supply cylinders are provided, the movement sequences of which are synchronized with each other during the transport of thick material, such that when one supply cylinder is pumping, the other supply cylinder executes a stroke. aspiration. Each supply cylinder has a corresponding suction opening. As described above, each of the supply cylinders is connected to the thick material collection container by means of a connection for complementarity of shape to introduce tensile forces and another connection to introduce compression forces. By dispensing with the protruding flange connections on the outside of the coarse material collection container, it is possible to arrange two supply cylinders that work in push-pull mode directly next to each other, saving space. Designs with more than two supply cylinders are also conceivable. The linear supply cylinders are preferably driven hydraulically, in particular by drive cylinders connected to the axially movable supply pistons of the supply cylinders, and may each have a water tank or a common water tank. The coarse material collection container is, in particular, a feed hopper. This may have an agitator to improve the flow of the transported material.

In another embodiment, it is provided that a bypass tube is provided in the coarse material collection container, in particular a hydraulically operated bypass tube, which is permanently connected at one end to the supply line and the other end of which is movable. back and forth between the suction openings such that the supply cylinder performing a respective pumping stroke is connected to the supply line, while the supply cylinder performing the suction stroke is connected to the internal side of the coarse material collection container. The diverter tube, which in particular consists of an S-pipe, can be driven by one or more rotating hydraulic cylinders.

The fixing of the at least one transport cylinder according to the invention via a shape-complementary connection and another additional connection can also be provided to fix the supply cylinder to a water tank. The water tank may be located at one end of the at least one supply cylinder opposite the coarse material collection container. The water tank can be used for cooling, lubrication and/or cleaning. Preferably, a piston rod of the supply cylinder is guided through the water tank, so a cylinder casing (almost like a continuation of the cylinder casing connected to the coarse material collecting container) can also be located in the other side of the water tank. Through the water tank, access is thus obtained in particular to the interior of the supply cylinder or to the piston rod.

The connection of the at least one supply cylinder to the water tank may be designed according to one or more of the embodiments described above. Therefore, the previous executions apply analogously to the possible connection to the water tank.

Other characteristics, particularities and advantages of the present invention result from the figures and execution examples described below. The figures show:

Figure 1: A longitudinal section through a supply cylinder and its attachment to the coarse material collecting container according to a preferred embodiment of the coarse material transport device according to the present invention in a side view.

Figure 2: An enlarged view of the attachment of the supply cylinder to the coarse material collection container. Figure 1 shows a side view of a section through a supply cylinder 12 of a preferred embodiment of the thick material transport device 10 according to the invention. The latter is, in particular, a concrete pump with two linear supply cylinders 12 arranged in parallel, which alternately perform pumping and suction strokes in countercycle and pump concrete from a coarse material collecting container 18, in particular, a hopper of feed 18, to a supply line not shown here. A hydraulically operated bypass tube (not shown here) designed as an S-pipe is permanently connected to the supply line and rotates back and forth between suction openings 22 formed in the housing 20 of the collection container. thick material 18 in such a way that the supply cylinder 12 that performs the respective pumping stroke is always connected to the supply line via the diverter pipe and pumps concrete into the supply line through the corresponding suction opening 22 , while the other supply cylinder 12, which is performing the suction stroke, sucks concrete from the coarse material collection container 18 through the corresponding suction opening 22.

Figure 2 shows an enlarged view of the mounting area of the supply cylinder 12 indicated as circle A in Figure 1. The term "supply cylinder" is used here to refer to the entire piston-cylinder unit. The supply cylinders 12 comprise a cylinder housing 14 (which could also be referred to as a cylinder tube 14) and have a cylinder opening 16 at the end facing the thick material collection container 18, which is connected to the interior of the collection container of coarse material 18 through the suction opening 22. The supply cylinders 12 are fixed to the housing 20 of the coarse material collecting container 18, which is only partially shown in Figure 1.

In Figure 1, only one of the supply cylinders 12 is shown, where for the sake of clarity, the components arranged inside the cylinder housing 14, such as the supply piston and the piston rod, are hidden. At the end of the supply cylinder 12 opposite the opening of the cylinder 16, a water tank 13 is screwed, which serves in particular for cooling, lubrication and cleaning. The supply cylinders 12 are driven in particular by the hydraulically driven cylinders (not shown here), which are connected to the supply piston of the corresponding supply cylinder 12 via a piston rod which is guided through the reservoir. water 13.

Strong forces occur during the transport operation. On the one hand, strong tensile forces act outwards on the shell 20 of the thick material collection container 18 (and on the water tank 13), while opposite compressive forces (i.e., towards the interior of the collection container of thick material 18) are minor. To provide a space-saving solution optimally adapted to this circumstance, the present invention provides that the supply cylinder 12 (hereinafter, reference will be made to a single supply cylinder 12 - but the explanations naturally apply to all cylinders supply 12 provided on the coarse material transport device 10) is attached to the housing 20 of the coarse material collecting container 18 in such a way that high tensile forces and weaker compressive forces are introduced into the housing 20 by separate paths, that is, through different connections 30, 32.

For this purpose, the supply cylinder 12 is connected by complementarity of shape to the housing 20 in the direction of the traction forces acting, while a threaded connection is provided for the transmission of compression forces acting in the opposite direction. 32. The form fit 30 is created by an insertion ring 24 inserted into a circumferential groove 28 provided in the cylinder housing 14, which abuts against a circumferential edge 26 formed inside the suction opening 22, thus forming a counter stop. For this purpose, the cylinder housing 14 is guided through the suction opening 22 and held there. The edge 26 is designed in such a way that the suction opening 22 widens towards the inner side 19 of the coarse material collecting container 18, i.e. in the housing 20, on the inner side 19 adjacent to the suction opening 22, a circumferential recess 27 is planned.

The insertion ring 24 is screwed to the edge 26 that forms the countertop through a threaded connection 32 (or through a flange with screws 33) formed by a plurality of screws 33 distributed around the circumference. Here, the lengths of the screws 33 are dimensioned in such a way that the screws are recessed in the recess 27 and, therefore, do not protrude inside the thick material collecting container 18. This allows a plate to be fixed on the inner side 19. of wear (not shown here) for the S-pipe, which covers the threaded connection 32. The fixing according to the invention allows the supply cylinder 12 to be placed completely in the suction opening 22 and guided to the wear plate. In this way, the concrete is pumped directly from the supply cylinder 12 through the wear plate into the S-pipe without interfering edges or throttling effect. Due to the form adjustment in the main loading direction (tensile forces), the screws 33 are subjected to considerably less tension.

As can be seen in Figure 2, the diameter of the suction opening 22 narrows slightly from the outside to the insert ring 24. The thickness of the cylinder housing 14 is correspondingly gradually reduced and has two circumferential seals. 23 on the outside to seal the inside of the thick material collection container 18 from the outside.

To mount the supply cylinder 12, the cylinder housing 14 is pushed into the suction opening 22. From the inside 19, the insert ring 24 slides over the inner end of the cylinder housing 14, which is made possible by to the circumferential recess 27. The insertion ring 24 is placed in the groove 24 so that it rests against the edge 26 and blocks a displacement of the supply cylinder 12 in an outward direction by complementarity of shape. By screwing the insert ring 24 to the edge 26 using the screws 33, the insert ring 24 is fixed in the recess 27 and thus the supply cylinder 12 is fixed. Now it can no longer move to the inner side 19. The wear plate can now be mounted. Replacing the insert ring 24 or supply cylinder 12 is just as simple.

A corresponding combination of positive fit and threaded connection can also be provided in the water tank 13. As an alternative to a circumferential insert ring 24, multiple individual stops can also be provided that fit into corresponding recesses in the cylinder housing 14. To this end, several individual recesses 27 with their respective countertops 26 can be provided. However, the Assembly is particularly simple with a single insert ring 24. Furthermore, instead of the connection 32 by means of the embedded screws 33, the wear plate screwed to the inner side 19 can anyway be used to make the other connection 32.

List of reference symbols:

10 Thick material transport device

12 Supply cylinder

13 Water tank

14 Cylinder casing

16 Cylinder opening

18 Collection container for thick materials

19 Internal side

20 Housing

22 Suction opening

23 Board

24 Stopper (insertion ring)

26 Counterstop

27 Discount

28 Recess (slot)

30 Connection by complementarity of form

32 Another connection

33 Screw

Claims (15)

1. Coarse material transport device (10), in particular for the transport of concrete, with at least one supply cylinder (12), by means of which coarse material can be transported from a coarse material collection container (18) to a supply line; characterized because The supply cylinder (12) is fixed to the coarse material collection container (18) in such a way that the tensile forces of the supply cylinder (12) acting during the transport of the coarse material are transmitted to the coarse material collection container ( 18) through a connection due to complementarity of shape (30) and the compression forces that act in the opposite direction through another connection (32). 2. Thick material transport device (10) according to claim 1, characterized in that the other connection (32) consists of a threaded connection, a bolt connection or a connection by complementarity of shape through a fixing ring and because preferably, it is not provided on an external side of the coarse material collecting container (18). 3. Thick material transport device (10) according to claim 1 or 2, characterized in that the supply cylinder (12) comprises a cylinder housing (14) with a cylinder opening (16) which is connected to a cylinder opening (16). suction (22) formed in a housing (20) of the thick material collecting container (18); where the connection due to complementarity of shape (30) is preferably located in the suction opening (22) or on it. 4. Device for transporting thick materials (10) according to claim 3, characterized in that the cylinder housing (14) is housed at least partially in the suction opening (22). 5. Thick material transport device (10) according to one of the preceding claims, characterized in that the supply cylinder (12) is connected by complementarity of shape with a housing (20) of the thick material collecting container (18) through of a stop (24). 6. Thick material transport device (10) according to claim 5, characterized in that a counter stop (26) is provided in the housing (20) of the thick material collecting container (18), which interacts with the stop (24) by complementarity of shape to block a movement of the supply cylinder (12) out of the suction opening (22), where the counterstop (26) is preferably formed inside the suction opening (22) or is formed through the side internal (19) of the thick material collecting container (18). 7. Thick material transport device (10) according to claim 5 or 6, characterized in that the stop (24) is housed in a recess (28), in particular, in a groove in the cylinder housing (14) and because preferably it can be disassembled from the supply cylinder (12). 8. Thick material transport device (10) according to one of claims 5 to 7, characterized in that the stop (24) is firmly connected, in particular screwed, to the housing (20) of the thick material collection container (18). . 9. Thick material transport device (10) according to one of claims 5 to 8, characterized in that the stop (24) is formed as an insertion ring which is arranged inside the suction opening (22) and is housed in a slot (28) that extends at least partially around the cylinder casing (14), where in the suction opening (22) an edge (26) is made at least partially circumferential as a countertop that forms a fit of shape with the stop (24). 10. Thick material transport device (10) according to claim 9, characterized in that the insertion ring (24) is firmly connected, in particular screwed, to the countertop (26) or because the supply cylinder (12) is held in the suction opening (22) by a component mounted on the inner side (19) of the coarse material collecting container (18), in particular, a wear plate with an opening covering the suction opening (22). 11. Thick material transport device (10) according to claim 9 or 10, characterized in that the suction opening (22) is designed in such a way that the insertion ring (24) for mounting in the cylinder housing (14) ) can be introduced into the suction opening (22) from the internal side (19) of the coarse material collection container (18). 12. Thick material transport device (10) according to one of claims 3 to 11, characterized in that a wear plate having an opening covering the suction opening (22) is mounted on the inner side (19) of the container. coarse material collector (18); wherein the supply cylinder (12) extends through the suction opening (22) to the wear plate. 13. Thick material transport device according to one of the preceding claims, characterized in that two supply cylinders (12) are provided, the movement sequences of which are synchronized with each other during the transport of thick material, such that when a supply cylinder supply cylinder (12) is pumping, the other supply cylinder (12) executes a suction stroke. 14. Coarse material transport device (10) according to claim 13, characterized in that a diverter tube, in particular a hydraulically operated diverter tube, which is permanently connected to a end to the supply line and whose other end can move back and forth between the suction openings (22) such that the supply cylinder (12) performing a respective pumping stroke is connected to the supply line , while the supply cylinder (12) that performs the suction stroke is connected to the internal side of the coarse material collection container (18). 15. Thick material transport device (10) according to one of the preceding claims, characterized in that the at least one supply cylinder (12) is connected to a water tank (13) in such a way that the traction forces of the supply cylinder (12) that act during the transport of the thick material are transmitted to the water tank (13) through a connection due to complementarity of shape and the compression forces that act in the opposite direction are transmitted to the water tank (13). 13) through another connection; wherein the other connection preferably consists of a threaded connection, a bolt connection or a connection by complementarity of shape through a fixing ring and which even more preferably is not provided on an external side of the water tank (13).