Holding rail for holding sections of a pipeline and concrete core temperature-control element comprising same

Abstract

The present invention relates to a retaining rail (1) for receiving sections of a piping (2) of a concrete core activation element (3), comprising (a) two longitudinal elements (4, 4') extending parallel and spaced apart from each other in the longitudinal direction of the retaining rail (1), which have a plurality of pipe receptacles (6) arranged in pairs opposite each other on the respective longitudinal elements (4, 4'), extending transversely in the longitudinal direction of the retaining rail (1) and each open to the same side; (b) a plurality of connecting elements (5, 5') arranged between the longitudinal elements (4, 4'), which connect the longitudinal elements (5, 5') to each other;and (c) a plurality of spacer elements (7, 7') which define the distance between the pipe receptacles (6) and a wall of the space to be tempered by the concrete core activation element (3), wherein the retaining rail (1) is characterized according to the invention in that the connecting elements (5, 5') are designed as connecting webs extending diagonally between the longitudinal elements (4, 4'). Furthermore, the present invention relates to a concrete core activation element (3) comprising at least two retaining rails (1) according to the invention, a piping (2) which is sectionally received into the pipe receptacles (6) of the retaining rails (1), and at least one lattice girder mat (1) applied to the retaining rails (1).

Description

[0001] The present invention relates to a retaining rail for receiving sections of piping of a concrete core activation element, comprising two longitudinal elements extending parallel and spaced apart from each other in the longitudinal direction of the retaining rail, which have a plurality of pipe receptacles arranged in pairs opposite each other on the respective longitudinal elements, extending transversely to the longitudinal direction of the retaining rail and each open on the same side; a plurality of connecting elements arranged between the longitudinal elements, which connect the longitudinal elements to each other; and a plurality of spacer elements, which define the distance between the pipe receptacles and a wall of the space tempered by the concrete core activation element.Furthermore, the present invention relates to a concrete core activation element comprising at least two such retaining rails, a piping system which is partially received into the pipe receptacles of the retaining rails and at least one lattice girder mat placed on the retaining rails.

[0002] Concrete core activation systems are used to regulate the temperature of rooms or building sections. These systems are often modular, meaning they are constructed from so-called concrete core activation elements or modules (CBE modules), or a precast concrete slab with an integrated CBE module is used, for example, to construct a concrete slab in single-family homes, offices, or administrative buildings. Such concrete core activation elements for so-called near-surface concrete core activation are known in the art through prior use. In this context, the term "near-surface" means that the piping through which the activation fluid, especially water, flows is arranged at a short distance from the room-facing outer surface of the concrete core activation element.Near-surface concrete core activation offers the advantage over conventional concrete core activation, where the piping is located approximately in the middle between the two outer sides of the concrete core activation element, of being less sluggish and thus able to react more quickly to changing thermal loads.

[0003] For near-surface concrete core activation, the lattice girder layer consists of several steel mesh panels welded together at their edges and / or individual reinforcing bars, which may also be twisted together. The piping, preferably a plastic pipe or a metal-plastic composite pipe (MKV pipe), is attached to this layer either directly or by means of retaining rails. The piping consists of pipes laid at regular intervals (maximum approximately 45 cm), with the attachment to the support mesh limiting sagging of the piping.

[0004] Retaining rails for such concrete core activation elements are known from the prior art. For example, EP 2 679 923 A1 describes such a retaining rail, which comprises two longitudinally parallel elements spaced apart from each other and which together form several pipe receptacles extending transversely to the longitudinal direction and open at the top. A disadvantage of the retaining rail described in EP 2 679 923 A1 is that concrete core activation elements comprising such a retaining rail are prone to stress cracking.

[0005] This is where the present invention comes in, which aims to overcome at least some of the disadvantages of the prior art. In particular, the retaining rail according to the invention is intended to have a reduced tendency to stress cracking.

[0006] These and other problems are solved by a retaining rail with the features of claim 1 and by a concrete core activation element with the features of claim 11. Preferred embodiments of the present invention are described in the dependent claims.

[0007] According to the present invention, it has been found that a retaining rail is less prone to stress cracking when the connecting webs linking the longitudinal elements are well exposed to the flow of liquid concrete grout during casting in the formwork. This results in a uniform distribution of the concrete grout without excessive air inclusions. Consequently, the risk of stress cracking is reduced. According to the invention, this is achieved by designing the connecting elements as connecting webs extending diagonally between the longitudinal elements.

[0008] Accordingly, the present invention comprises a retaining rail for receiving sections of piping of a concrete core activation element, comprising two longitudinal elements extending parallel and spaced apart from each other in the longitudinal direction of the retaining rail, which have a plurality of pipe receptacles arranged in pairs opposite each other on the respective longitudinal elements, extending transversely to the longitudinal direction of the retaining rail and each open on the same side; a plurality of connecting elements arranged between the longitudinal elements, which connect the longitudinal elements to each other; and a plurality of spacer elements, which define the distance between the pipe receptacles and a wall of the space tempered by the concrete core activation element, wherein the retaining rail is further characterized according to the invention in that the connecting elements are designed as connecting webs extending diagonally between the longitudinal elements.Furthermore, the present invention relates to a concrete core activation element comprising at least two such retaining rails, a piping system which is partially received into the pipe receptacles of the retaining rails and at least one lattice girder mat placed on the retaining rails.

[0009] It can be advantageous if the connecting webs are divided into two types, one type of connecting web being arranged such that it is connected to the longitudinal elements on opposite sides of a pair of opposing pipe receptacles. It is particularly preferred if the other type of connecting web is arranged such that it is connected to the longitudinal elements on opposite sides of adjacent pairs of pipe receptacles. Such a geometry results in a simple design of the retaining rail according to the invention with high mechanical stability. It is particularly preferred if the type of connecting webs that are connected to the longitudinal elements on opposite sides of a pair of opposing pipe receptacles, viewed in the vertical direction of the retaining rail according to the invention, run below the pipe receptacles. This frees up the space required for the piping.The connecting webs, which are attached to the longitudinal elements on different sides of adjacent pairs of pipe supports, can in principle run at any height along the retaining rail according to the invention. However, it is preferred that the connecting webs run at the same height as the pipe supports. Connecting webs running at different heights relative to the pipe supports contribute to high mechanical stability of the retaining rail according to the invention and also to a uniform distribution of the concrete grout in the formwork.

[0010] It can also be helpful if the connecting elements have at least partial openings for the insertion of fasteners. In this way, the retaining rail according to the invention can be easily and securely attached to a formwork for casting with concrete grout.

[0011] According to the invention, the retaining rail comprises spacer elements that define the distance between the pipe receptacles and a wall of the space to be tempered by the concrete core activation element. In preferred embodiments of the present invention, the spacer elements are arranged in two sets, one set of spacer elements defining a different distance between the pipe receptacles and a wall of the space to be tempered by the concrete core activation element than the other set of spacer elements. The retaining rail preferably has two types of spacer elements: one set of spacer elements that defines a smaller distance between the pipe receptacles and a wall of the space to be tempered by the concrete core activation element, and another set of spacer elements that defines a larger distance.By choosing the orientation of the retaining rail in the concrete core activation element, its installation height can then be selected.

[0012] It can also be helpful if the spacer elements are arranged along the longitudinal edges of the longitudinal elements. This results in a simple design of the retaining rail according to the invention. It is particularly preferred if one set of spacer elements is arranged along one longitudinal edge of the longitudinal elements and the other set of spacer elements is arranged along the other longitudinal edge of the longitudinal elements. In this way, it can be easily and reliably implemented that different orientations of the retaining rail according to the invention lead to different pipe configurations of the concrete core activation element according to the invention.

[0013] Preferably, the spacer elements are cylindrical in shape. One end of the cylinder may have a rounded contact surface.

[0014] It can also be advantageous to place a spacer on both sides of the pipe opening. This prevents the bars of the lattice girder mat from coming into contact with the piping. Such contact can lead to structural problems due to differing thermal expansion rates during temperature fluctuations in the concrete core activation system.

[0015] It can also be helpful if the pipe fittings are Ω-shaped. This geometry securely holds sections of piping inserted into the fittings, even if the open side of the fitting is facing the ground.

[0016] It can also be advantageous if the retaining rail according to the invention is designed as a plastic component, in particular as a one-piece plastic component. Such a retaining rail can be readily produced by injection molding.

[0017] The preceding explanations relating to the retaining rail according to the invention apply accordingly to the concrete core activation element according to the invention.

[0018] The retaining rail, the concrete core activation element, and individual parts thereof according to the invention can also be manufactured line by line or layer by layer using a line-by-line or layer-by-layer manufacturing process (e.g., 3D printing). Preferably, the retaining rail according to the invention is manufactured by injection molding.

[0019] The present invention will now be explained in detail with reference to the embodiment shown in the figures. Figure 1 is a perspective view of a retaining rail according to an embodiment of the present invention; Figure 2 is a side view of a longitudinal element of the Fig. 1 shown retaining rail according to the invention; Figure 3, which is in Fig. 1shown retaining rail in a top view; and Figure 4 a perspective view of a concrete core activation element according to the invention, which includes the in Figs. 1 to 3 The holding rail shown according to the invention comprises [the following].

[0020] Corresponding parts or elements are in the Figures 1 to 4 with the same reference symbols.

[0021] In Fig. 1 Figure 1 is a perspective view of a section of a retaining rail 1 according to an embodiment of the present invention. The retaining rail 1 according to the invention serves to receive sections of a piping 2 of a concrete core activation element 3 ( Fig. 4The retaining rail 1 according to the invention comprises two longitudinal elements 4, 4' extending parallel to and spaced apart from each other in the longitudinal direction of the retaining rail 1, which in the illustrated embodiment are designed in a rail-like form. The longitudinal elements 4, 4' are connected to each other by connecting elements 5, 5', which determine the distance between the longitudinal elements 4, 4'. Each longitudinal element 4, 4' has several pipe receptacles 6. The pipe receptacles 6 are oriented such that their open side each points in the same direction (inwards). Fig. 1 upwards). The pipe receptacles 6 extend transversely to the longitudinal direction of the longitudinal elements 4, 4'. The pipe receptacles 6 are arranged such that each pipe receptacle 6 on the longitudinal element 4 is opposite a pipe receptacle 6 on the longitudinal element 4'.

[0022] The longitudinal elements 4, 4' have several spacer elements 7, 7' along their longitudinal edges. In the illustrated embodiment of the retaining rail 1 according to the invention, the spacer elements 7, 7' are cylindrical and integrally connected to the longitudinal elements 4, 4'. The end of the spacer elements 7, 7' not connected to the longitudinal elements 4, 4' is rounded, in particular hemispherical, in the illustrated embodiment.

[0023] The distance between the pipe receptacles 6 of the retaining rail 1 according to the invention and a wall of the space to be tempered by the concrete core activation element 3 is determined by the spacer elements 7, 7'.

[0024] As can be seen in particular from the side view according to Fig. 2As can be clearly seen, there are two sets of spacer elements 7, 7': One set of spacer elements 7 is arranged on the longitudinal edge of the longitudinal elements 4, 4', towards which the pipe receptacles 6 are open. A spacer element 7 is located laterally next to each pipe receptacle. This prevents a grid bar 8 of a grid support mat 9 placed on the retaining rail 1 according to the invention from coming into contact with the piping 2. Such contact can lead to static problems due to the different thermal expansion rates during temperature fluctuations in the operation of the concrete core activation system.

[0025] The other set of spacer elements 7' is arranged on the other longitudinal edge of the longitudinal elements 4, 4'. In the illustrated embodiment of the retaining rail 1 according to the invention, the spacer elements 7' are located at a position below the apex of the pipe receptacles 6 and additionally approximately below the midpoint of two apex points of the pipe receptacles 6.

[0026] The spacer elements 7 on one longitudinal edge of the longitudinal elements 4, 4' are longer than the spacer elements 7' on the other longitudinal edge of the longitudinal elements 4, 4'. Thus, the spacer elements 7 define a predetermined distance between the pipe receptacles 6 and a wall of the room to be tempered by the concrete core activation element when the retaining rail 1 according to the invention is installed in such a way that the spacer elements 7 are directed towards the wall of the room to be tempered. Since the spacer elements 7' are shorter than the spacer elements 7, the distance between the pipe receptacles 6 and the room wall or ceiling is smaller when the retaining rail 1 according to the invention is installed in such a way that the spacer elements 7' are directed towards the wall of the room to be tempered.This means that the retaining rail 1 according to the invention can be used well for concrete core activation elements 3 with two different installation heights.

[0027] In the illustrated embodiment of the retaining rail 1 according to the invention, the connecting elements 5, 5' are designed as connecting webs 5, 5' extending diagonally between the longitudinal elements 4, 4'. Such connecting webs allow the liquid concrete grout to flow freely around them, resulting in a uniform distribution of the concrete grout within the formwork. This reduces the risk of stress cracking.

[0028] From the top view of the retaining rail 1 according to the invention Fig. 3Looking at the open side of each pipe receptacle 6, it can be seen that there are also two types of connecting webs 5, 5': The first type of connecting web 5 is arranged such that it is connected to the longitudinal elements 4, 4' on opposite sides of a pair of opposing pipe receptacles 6. To create space for the piping 2, these connecting webs 5 run below the pipe receptacles 6 when viewed in the vertical direction of the retaining rail 1 according to the invention. The second type of connecting web 5', on the other hand, is arranged such that it is connected to the longitudinal elements 4, 4' on opposite sides of adjacent pairs of pipe receptacles 6. Viewed in the vertical direction of the retaining rail 1 according to the invention, the connecting webs 5' run at the level of the pipe receptacles 6.Such a geometry results in a simple construction of the retaining rail 1 according to the invention with high mechanical stability and also contributes to the uniform distribution of the concrete casting compound in the formwork.

[0029] The connecting elements 5, 5' can also have at least partial openings 8 for the passage of fastening means with which the retaining rail 1 according to the invention can be attached to a formwork. In the Figs. 1 to 3 In the illustrated embodiment of the retaining rail 1 according to the invention, every second of the connecting webs 5' running at the level of the pipe receptacles 6 has such a passage 8.

[0030] The pipe receptacles 8 are Ω-shaped. This geometry ensures that once sections of the piping 2 are inserted into the pipe receptacles 6, they are securely fixed within the pipe receptacles 8 and thus to the retaining rail 1 according to the invention. Therefore, the piping sections cannot fall out of the pipe receptacles 6 in either orientation of the retaining rail 1 according to the invention.

[0031] In Fig. 4 is a perspective view of a concrete core activation element 3 according to the invention, which is described in Figs. 1 to 3 The mounting rail 1 shown according to the invention comprises sections of a piping 2 in pipe receptacles. A lattice girder mat 1 is applied to this arrangement.

[0032] According to this embodiment, the lattice girder mat 9 is constructed from steel bars, wherein longitudinal bars 10 of the lattice girder mat 1 are arranged parallel to each other at equal intervals, and then, at right angles to these, further bars 11, transverse bars 11, are laid over them, also at equal intervals, and welded at the intersection points. This gives the lattice girder mat 9 a square mesh pattern. Alternatively, rectangular mesh patterns or mesh patterns in the shape of parallelograms or diamonds are also conceivable. In such cases, other angles between the parallel longitudinal bars 10 and the parallel transverse bars 11 can also occur, other than right angles.

[0033] In the concrete core activation element 3 according to the invention Fig. 4The crossbars 11 run parallel to the piping 2 in sections. The crossbars 11 run alongside the open sides of the pipe supports 6, each between two spacer elements 7. This prevents contact between the crossbars 11 and the corresponding sections of the piping 2.

[0034] The piping 2 can be spiral, meandering, or double meandering. The piping 2 is provided with a supply and a return line and is preferably laid without crossings. Individual parallel pipe sections are preferably each connected via a deflection area arranged on one longitudinal side of the concrete core activation element 3 according to the invention, with a 180° reversal of direction. The piping 2 is constructed of a dimensionally stable pipe material. For example, a metal-plastic composite or a cross-linked plastic (in particular cross-linked polyethylene PEX) is used as the piping material.

[0035] To manufacture the concrete core activation element 3 according to the invention, the sections of the piping 2 are first inserted into the pipe receptacles 6 of the retaining rails 1 according to the invention. The lattice girder mat 9 is then placed onto this assembly as described. This assembly can be placed on formwork, fastened to it with fasteners, in particular nails, which are guided through the openings 8, and then grouted with concrete. Several such assemblies can also be placed in one formwork. Alternatively, several retaining rails 1 can be connected to each other longitudinally to produce larger elements 3. After this grout has dried, the prefabricated concrete core activation element 3 according to the invention can be transported to its place of use. Alternatively, the grouting can also be carried out on-site at the construction site.

[0036] In the case of a prefabricated concrete core activation element 3 according to the invention, it can then be transported to its place of use and, for example, installed as a ceiling or wall element. Finally, the entire element 3 is cast again with concrete. Alternatively, the completed concrete core activation element 3 according to the invention can also be used directly as a cooling / heating panel. For this purpose, it only needs to be suspended, for example, from an existing ceiling. Apart from connecting the supply and return lines, no further significant work is required, in particular no second casting with concrete.

[0037] The present invention has been described in detail by way of example with reference to the embodiment of the present invention shown in the figures. It is understood that the present invention is not limited to the embodiments shown in the figures. Rather, the scope of the present invention is defined by the accompanying claims.

Claims

1. Retaining rail (1) for receiving sections of a piping (2) of a concrete core activation element (3), comprising: (a) two longitudinal elements (4, 4') extending parallel to each other in the longitudinal direction of the retaining rail (1), each having a plurality of pipe receptacles (6) arranged in pairs opposite each other on the respective longitudinal element (4, 4'), extending transversely to the longitudinal direction of the retaining rail (1) and each open on the same side; (b) a plurality of connecting elements (5, 5') arranged between the longitudinal elements (4, 4'), which connect the longitudinal elements (5, 5') to each other; and (c) a plurality of spacer elements (7, 7') which define the distance between the pipe receptacles (6) and a wall of the space to be tempered by the concrete core activation element (3), characterized by the fact that the connecting elements (5, 5') are designed as connecting webs running diagonally between the longitudinal elements (4, 4').

2. Retaining rail (1) according to claim 1, characterized by the fact that the connecting elements (5, 5') are divided into two types, one type of connecting element (5) being arranged such that it is connected to the longitudinal elements (4, 4') on opposite sides of a pair of opposing pipe receptacles (6).

3. Retaining rail (1) according to claim 2, characterized by the fact that the other type of connecting elements (5') is arranged such that they are connected to the longitudinal elements (4, 4') on different sides of adjacent pairs of pipe receptacles (6).

4. Retaining rail (1) according to one of claims 1 to 3, characterized by the fact that the connecting elements (5, 5') have at least partial openings (8) for the passage of fastening elements.

5. Retaining rail (1) according to one of claims 1 to 4, characterized by the fact thatthe spacer elements (7, 7') are arranged in two sets, one set of spacer elements (7) specifying a different distance between the pipe receptacles (6) and a wall of the space to be tempered by the concrete core activation element (3) than the other set of spacer elements (7').

6. Retaining rail (1) according to claim 5, characterized by the fact that the spacer elements (7, 7') are arranged along the longitudinal edges of the longitudinal elements (4, 4').

7. Retaining rail (1) according to claim 6, characterized by the fact that one set of spacer elements (7) is arranged along one longitudinal edge of the longitudinal elements (4, 4') and the other set of spacer elements (7') is arranged along the other longitudinal edge of the longitudinal elements (4, 4')- 8. Retaining rail (1) according to one of claims 1 to 7, characterized by the fact that A spacer element (7) is arranged on both sides of the opening of the pipe receptacles (6).

9. Retaining rail (1) according to one of claims 1 to 8, characterized by the fact thatthe pipe receptacles (6) are Ω-shaped.

10. Retaining rail (1) according to one of claims 1 to 9, characterized by the fact that it is designed as a plastic component.

11. Concrete core activation element (3), comprising at least two retaining rails (1) according to one of claims 1 to 10, a piping (2) which is partially received into the pipe receptacles (6) of the retaining rails (1) and at least one lattice girder mat (1) applied to the retaining rails (1).

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