NO840840L - WALL APPLICATION FOR CABLES, LIKE CABLES, PIPES OR SIMILAR, AND A DEVICE FOR MANUFACTURING AN INTERNAL WALL AREA FOR SUCH IMPLEMENTATION IN A CONCRETE WALL - Google Patents

Description

The invention relates to a wall penetration for cables, such as cables, pipes or the like, consisting of fitting pieces that fill the void in the wall opening in whole or in part and are elastic, which fitting pieces seal firstly against the cables and secondly against the inner wall surface in the wall opening, as the fitting pieces form cable receptacles adapted in shape and size to the individual cable cross-sections, and further consisting of a pressure device which causes an elastic pressing of the fitting pieces in the wall opening.

Furthermore, the invention relates to a device for manufacturing

of an inner wall surface for such a passage in a concrete wall.

Implementation of the initially mentioned type is known from DE-PS 958 671 and DE-OS 26 54 806. As a rule, they serve to form a fire-protective termination for cable runs between fire section zones separated from each other by the wall. In addition to the penetration having as long a fire resistance period as possible, the penetration must also provide the best possible sealing of the cable penetration against water, gas and smoke. The known devices consist of a frame around an essentially box-shaped empty space which is open in the direction of penetration. The inward circumferential surface of this frame forms the inner wall surface against which the fitting pieces are placed and pressed. The pressure device used for this pressing is arranged in the same way as the spacers inside the frame void, and can be spread out in the frame plane by means of screw bolts. From DE-PS 958 671, an implementation is known where the frame is a metal frame embedded in the wall, built in or welded in, which either has to be built in during the construction of the wall, while the wires are usually only laid later, or the frame is cast in or built in later.

In the latter case, sufficiently large openings must be designed in the wall. The embedment or walling must be carried out with great accuracy so that the frame in its fully built-in condition has sufficient fire safety and gas and water tightness, also in relation to the wall. The pressure device fills part of the frame space and includes, firstly, a screw anchored in the metal frame which, via a metal plate lying against the fitting pieces, exerts pressure on the fitting pieces and thus presses them together, and secondly includes a pressure piece that fills the empty space over the metal plate, as this pressure piece can be spread out in the frame plane by means of screw bolts, so that the pressure piece seals against the metal plate and against the frame wall on

the side of the sheet metal facing away from the fit pieces. The fairly significant work associated with embedding, embedding or welding the frame into the wall opening is avoided with the device known from DE-OS 26 54 806, whereby the frame is designed as a string profile section, consists of a limited elastically deformable material, such as .ex. natural or synthetic rubber, and in that the string profile has a uniformly curved, cylindrical or nearly cylindrical outer casing surface. The pressure device consists of at least four wedge-shaped profiled parts which, when assembled, fill part of the frame space. Two wedge pieces arranged in the direction of penetration are penetrated by one or more screw bolts provided with washers, and two further wedge pieces rest against two mutually opposite flat parts in the inner wall of the frame. As the frame consists of a limited elastically deformable material, the frame will seal against a correspondingly designed wall breakthrough, under the influence of the pressure device, or the frame can be inserted in a tight manner in a pipe or in a core drilling made in the wall.

These known implementations have proven to be well suited in practice, but they have the disadvantage that they require a circumferentially closed frame and that a significant part of the frame space is not available for wiring, because the pressure device requires space.

The purpose of the invention is to design a passage of the type mentioned at the outset so that the pressure device is arranged outside the empty space in the wall opening, so that the entire wall opening is thereby available for cable passage.

This is achieved according to the invention by the fact that the light opening to the wall opening decreases from one side of the wall to the other, the inner wall surfaces having a pyramidal or truncated cone-like course, and also that the pressure device has a clamping flange running along the perimeter of the opening on the side of the wall where the larger opening cross-section is located. from the edge of the wall opening partially overlaps the fitting pieces on their end sides and presses them axially into the wall opening.

When the fitting pieces mounted in the wall opening, which together with the wires completely fill the cross-section of the wall opening, are pressed against the wall using the clamping flange, the gasket formed by all the fitting pieces will be pushed axially further into the tapering wall opening. Thereby, the fitting pieces are pressed against each other, against the wires and against the inner wall of the wall opening, and the desired sealing and fire protection is achieved, without the need for a separate frame that encloses the fitting pieces. The fittings can consist of a fire protection compound which hardens in the event of a fire and expands before hardening, or can contain such a fire protection compound, so that a tight seal is achieved between the cable core, which does not change in the event of a fire, while the cable sheath, in particular when revolves around cable sheaths, burns away. The wire residues will embed themselves in a sealing manner in the fire protection compound.

Often, the compression of the fitting pieces by means of the clamping flange and the resulting friction between the elements will be sufficient to prevent a mutual axial displacement of the fitting pieces when there are different pressures on the two wall sides. Such security against fit-piece displacements will not always exist, especially not in the middle cross-sectional area of the wall opening, when the penetration is intended for sealing against high pressure differences and/or the wall opening has a large cross-section.

In order to reliably prevent such mutual axial displacements of the fitting pieces also under unfavorable conditions,

and particularly in the middle cross-sectional area of the wall opening, the passage according to the invention can be designed in such a way that the fitting pieces in the radial direction uniformly and consistently fill out the cross-section of the wall opening in a sector-wise or sector-wise manner. In addition, the fitting pieces have separating surfaces that go inwards from the surface that abuts the inner wall of the wall opening and inwards in the direction towards the axis of the wall opening. At least one of the cable receptacles is arranged at one of these separating surfaces, as this separating surface may end in the respective cable receptacle or may cross the cable receptacle.

The advantage achieved there is that each fitting piece extends radially to the inner wall of the wall opening, and is thus pressed against the inner wall by means of the clamping flange, so that axial displacements between the fitting pieces and the inner wall and thus also between each other are excluded. Each individual fitting is attached directly to the inner wall using the clamping flange, and is held securely even against large pressure differences. Because the wire receptacles are arranged at the separating surfaces, the wires can be easily inserted into the wire receptacles, as the fitting pieces are then shifted as far apart in the separating surfaces, or spread apart in an elastic manner, so that the wires can be inserted radially from the outside into the respective wire receptacles.

It is possible with one dividing surface not only to have one cable entry but also several, usually with a smaller cross-section.

It is naturally within the framework of the invention also possible to

have separation surfaces where no cable entry is provided at all. Usually, the dividing surfaces extend into the axis of the wall opening. However, it is also possible to simply let the separating surfaces extend into the central recess surrounded by one of the pass pieces. This central recess can possibly be used as a cable entry. If it is particularly a wall opening with a large cross-section, it is recommended to arrange a tension anchor in the central recess. The clamping anchor connects two clamping flanges which engage radially outwards at the two axial sides of the fitting pieces

the cut-out edges of the fitting pieces. When pressed together, the fitting pieces will seal against the tension anchor in the same way as against the cables. With the help of the tension anchor and the two tension flanges contracted by the tension anchor, the fitting pieces will be connected directly axially to each other also in the central area of the wall opening, so that the fitting pieces are thereby provided with a very advantageous mutual stabilization, which is particularly advantageous when there are large pressure differences , so that even the radially inner ends of the fitting pieces cannot be axially displaced in relation to each other under the influence of the pressure difference. A similar stabilization result can also be achieved without tension anchors and tension flanges. This can up-

is achieved by all fitting pieces being designed as one with each other in the central area, with all separating surfaces ending in a respective cable entry. In such an embodiment, the pass pieces will form a uniform seal. From the cable receptacles and towards the outer peripheral surface there are slits that form the respective separating surfaces. These separating surfaces will be able to be spread apart by the elastic deformation of the gasket body so that a cable can be introduced into the associated cable receptacle.

If the wall is a metal wall, in particular a steel wall, for example on board a ship, then in a preferred embodiment the inner wall of the wall opening is formed by the mantle of a pyramidal or truncated cone-shaped sleeve which is inserted into the wall and is, for example, welded. An appropriate embodiment in this context is distinguished by the fact that the sleeve at its largest cross-section sleeve edge carries a fastening flange that abuts the wall and protrudes through the wall opening and that in the side of the fastening flange facing away from the sleeve there are tension bolts for the tension flange.

With a brick or concrete wall, on the other hand, the inner wall of the wall opening is preferably formed directly by at least a section of the wall opening itself. Visually, the inner wall at the edge located at the largest cross-sectional area is provided with an anchor ring that is inserted into the wall opening and flush with the outer side of the wall. The clamping flange can be pre-tensioned against this anchor ring, thereby exerting a pressing effect on the fitting pieces. Inserting the anchor ring into the wall opening in such a way that it is flush with the outer wall surface enables it to be fixed in the formwork before the wall is cast, without any formwork openings being required for the installation of the through-hole. Appropriately, the anchor ring has an internal threaded portion in its internal peripheral surface, as the clamping flange fits into this threaded portion with a corresponding external threaded portion. By turning the clamping flange in the anchor ring, a pressure effect can then be exerted on the gasket formed by the fitting pieces in a simple way. In a preferred embodiment, the clamping flange has a collar where the external threads are located, and the fitting pieces have seam-like recesses, like this.

that the collar gripping into the recesses grips ring-shaped around the fitting pieces. The clamps will thus hold the gasket formed by the fitting pieces together also in the part where the fitting pieces still protrude freely from the wall opening.

A very important prerequisite for a good result with concrete walls is that there is a smooth and dent-free inner wall surface in the wall opening, as the inner wall surface must form a sealing surface system for the fitting pieces in the pre-assembled construction. According to the invention, a particularly suitable device for the production of such an inner wall is characterized by the fact that it includes a casing pipe and a thus releasable screw-together shaped pipe which forms the later inner wall in the wall opening. The shaped pipe is designed with a conically tapering outer wall in accordance with the desired inner wall in the direction of the casing. Furthermore, the device is characterized by the fact that it includes an anchor ring which sits on the end of the shaped pipe facing away from the casing and detaches from the shaped pipe when the shaped pipe is unscrewed from the casing. Such loosening takes place after the device has been cast into the concrete wall and the concrete has hardened. Released upon release

the inner wall of the wall opening. The casing and anchor ring out-

thus making lost formwork parts that remain in the wall,

while the formwork is unscrewed to expose the inner wall of the wall opening after the concrete has hardened. The inner wall of the wall opening can be inspected so that it can be determined whether there are hollow formations or other defects that can possibly be rectified. After the cable has been brought in through the wall opening, you only need to insert the fitting pieces and press them against the inner wall of the wall opening with the help of the clamping ring, as the clamping ring is pre-tensioned against the anchor ring. In an appropriate embodiment, in addition to being screwed together with the casing, the pipe is also screwed together with the anchor ring, as both threads have the same thread direction and the same thread pitch, so that the pipe is loosened both from the casing and from the anchor ring when it is unscrewed. In addition, the casing tube, seen from the form tube side, can have outward projections beyond the threads. These protrusions serve to anchor the casing in the concrete wall. Likewise, the anchor ring can have projections protruding from the edge which are designed both for joining several anchor rings next to each other as well as for anchoring in the wall. Furthermore, for such a joint, one has the very appropriate option of being able to design the outer circumference of the anchor ring at right angles or square.

The invention shall be explained in more detail with reference to the drawings where: Figure 1 shows an axial section through a fitting according to

the invention, pre-assembled in a concrete wall,

figure 2 shows an end view of the implementation in figure 1, set

in the direction of the arrow II drawn in Figure 1,

figure 3 shows a device for producing the inner wall of the wall opening for a passage as shown in figure 1,

and the figure is an axial section as in figure 1,

Figure 4 shows another embodiment of the implementation according to the invention, particularly suitable for steel walls, in axial section

if in . figure 1, figure 5 shows an axial section through another embodiment

form of the implementation according to the invention, likewise

mounted in a concrete wall,

figure 6 shows a perspective view of the fitting pieces in the implementation in figure 5, without wires, and figures 7-12 show respective embodiments of the fitting pieces.

In the drawings, for the sake of clarity, only some or only a few wires 1 are shown. The wires 1 pass through a wall opening 2 in a concrete wall 3.1 in figures 3, 1 and 5, and a steel wall 3.2

in figure 4. The penetration itself consists of fully or partially elastic fitting pieces 4, 4', for example of neoprene, which fill the void in the wall opening 2. The fitting pieces 4, 4' are sealed against the wires 1 and against the inner wall 5 in the wall opening 2 and therefore also mutually. This sealing mainly takes place by the fact that with 4 designated fitting pieces, they form cable receptacles 120 whose shape and size are adapted to the individual cable cross-sections and thus have the possibility of sealing against the cables 1 under pressure. Moreover, the fitting pieces 4, to the extent that they reach the wall 5, as in figures 5-12; will also fit tightly against the wall 5 under the influence of the sealing pressure. As shown in Figures 1, 2 and 4, one also has the option of arranging own fitting pieces 4' at the edge side, which fitting pieces ensure sealing against the wall 5. In all cases, the necessary sealing

pressure of a pressure device which elastically presses the fitting pieces 4, 4<1> into the wall opening 2.

The light opening in wall opening 2 decreases from one side of the wall towards

the other, in the sections shown, run from left to right, and the inner wall rafters in the wall openings have a pyramidal or truncated cone-like course. The outer perimeter plates of the pass pieces 4, 4' against the wall 5 are adapted to this design and the slope of the wall surface. The pressure device mainly consists of one on the wall side where the largest opening cross-section is,

clamping flange 6 extending along the opening circumference as in it

the smallest partially grips over the fitting pieces 4, 4' on their end sides from the opening edge and presses deft axially into the wall opening 2, as this happens when the clamping flange is pulled axially in the direction towards the wall 3.1 and 3.2 respectively.

When it concerns a concrete wall as shown in figures 1-3

and 5, the wall 5 is directly formed by at least one section of the wall opening 2. The wall 5 faces an anchor ring 7 at the edge that goes around the larger cross-section of the opening. This anchor ring is inserted into the wall opening 2 and is flush with the outside of the wall. The clamping flange 6 can be clamped against this anchor ring to exert the pressure angle on the fitting pieces 4, 4'. In the design examples, the anchor ring 7 is provided for this purpose

with an internal threaded portion 8 into which the clamping flange 6 can be screwed

i with its external threads 9. The clamping flange 6 is provided with a hole 10 on the end surface, intended for a not shown clamping key for turning the clamping flange. The external threads 9 are arranged on a collar 11 on the clamping flange 6. For this collar 11, there are fold-like recesses 12 arranged in the fitting pieces 4, 4', so that the collar 11 gripping into these recesses 12 can enclose the fitting pieces 4, 4 ' ring-shaped and also hold them together where they protrude axially from the wall opening 2. If the clamping ring 6 is turned in the anchor ring 7, the clamping ring 6 can be brought to exert a pressure effect against the fitting pieces 4, 4' so that these are pressed axially further in in the narrowing wall opening 2. Thereby the fitting pieces 4, 4' are pressed together and a higher sealing pressure is achieved between the fitting pieces 4,

4', between the fitting pieces 4, 4' and the wires 1 and between the fitting pieces 4, 4<1> and the wall 5.

In the embodiments in Figures 5 - 11, the spacers 4 in the radial direction uniformly fill continuous sector or sector section-shaped cross-sectional parts of the wall opening 2. The spacers have separating surfaces 16.1, 16.3 which extend from the surface 14 adjacent to the wall 5 and inwards into direction towards the 2nd axis of the wall opening 115.

The cable receptacles 110. are arranged at these separating surfaces 16.1, 16.3, and the separating surfaces can, as shown at 16.3, end in the respective

ve cable receptacles 120 or they can, as shown in 16.1, cross the cable receptacles 120. The latter case is shown in figure

ene 5 - 11, while the latter case is shown in figure 12.

Along a separating surface 16.1, there can be arranged several cable receptacles 120 crossed by the separating surface, see figures 9 and 11. The cross-sections of such cable receptacles 120 are then due to space

ner naturally less than where there is a single cable entry at a dividing surface 16.1. Otherwise, all separating surfaces 16.1 can be separating surfaces that cross cable take-

one 120, as shown in Figure 7, but usually it will also refine

nes separating surfaces 16.2 which are not assigned to any cable entry 120 at all, see Figures 6 and 8 - 11.

The separating surfaces 16.1., 16.2 can extend all the way to the axis

115 in the wall opening, see figures 6-9. However, it is also possible to let the separating surfaces 16.1., 16.2 only extend to one of the fitting pieces 4, surrounded by central recess 117, as shown in figure 10. The central recess 117 can optionally be used as a cable receptacle, where the separating surfaces 16.1, 16.2 ends. However, the central recess 117 can also be used for placing a tension anchor 119 which seals against the inner circumferential folds 118 on the fitting pieces 4, that is to say the surfaces facing the central recess. The clamping anchor connects two clamping flanges 200 which are arranged on each end side of the fitting pieces 4. The clamping flanges extend radially outward and grip over the edges of the fitting pieces around the central recess 117. This prevents mutual axial displacements of the radially inner ends of the sector-shaped fittings -pieces 4, which provides a particularly advantageous stabilization of the fitting pieces 4 when the cross-section in the wall opening 2, which is to be closed with the fitting pieces 4, is large, and or when the pressure difference between the two end sides of the penetration is large.

As shown in Figure 12, there is also an option to allow all separating surfaces 16.3 to end in a cable receptacle 120, while the fitting pieces 4 in the central area 10 are designed as a unit. This uniform design in the central area 210 provides a similar stabilizing effect as the tension anchors 119 described in connection with 11. The elasticity of the material makes it possible that, in the design example in Figure 12, the separation surfaces 16.3 can be spread apart elastically so far to open the cable receptacles 120 that cables 1 can be inserted into the cable entries 120 from the outside and inwards.

The device shown in figure 3 for providing the wall 5 in a passage as shown in figures 1,2 and 5 in a concrete wall 3.1, includes a casing pipe 13, a thus releasable screwable form pipe 14 which serves to form the wall 5, and an anchor ring 7 which sits on the end of the formwork facing away from the casing 13 and detaches from the formwork 14 when, after the concrete wall casting and curing of the concrete, the formwork 14 is unscrewed from the casing 13. The formwork 14 has a conical outer wall in accordance with the desired shape of the wall 5, and the formwork is thus narrowed in the direction towards the casing 13. When the shaped pipe 14 is unscrewed from the casing 13, the wall 5 is exposed whereby it can be inspected and possibly improved so that it is suitable as a sealing surface for cooperation with the fitting pieces 4 or 4'. The shaped pipe 14 is

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also screwed together with the anchor ring 7. Both threads 8.15 -é" have the same thread direction and the same thread pitch, so that the shaped tube 14 when unscrewed will loosen both from the casing at the same time

13 and from the anchor ring 7. Both casing and anchor ring remain in the concrete wall 3.1. The casing 13 can, as shown in the design example, consist of two telescoping parts 13.1, 13.2, which can be glued together in a mutual position determined by the wall thickness, so that the total length of the device, including the shaped pipe 14 and anchor ring 7, can exactly correspond to the later wall thickness and the device can thus be inserted between the two wall formwork 160 without the need for formwork openings. The one-sided openings in the form tube 14 and in the lining

the pipe 13 can be temporarily closed with clamp covers 17, thereby preventing concrete from penetrating into the pipes 13,14. The threads 15 on the casing 13 are formed on the inner part 13.2 of the casing 13. On this part 13.2 there can also be a projection 18, for example in the form of a collar which enables an anchoring of the casing 13 in the concrete wall 3.1. In the position shown in figure 3 when screwed onto the casing 13, the casing 14 can be sealed against the casing 13 with a sealing ring 19, thereby preventing concrete from penetrating into the threads 15 between the casing and the casing. Correspondingly, a gasket 20 can also be arranged between the shaped pipe 14 and the anchor ring 7. Also, the shaped pipe 14 has end recesses 21 for a key. As shown in Figures 1-3, the anchor ring 7 can also have from the edge outwards projecting projections 22. These serve for anchoring in the wall 3.1 and can also be designed for joining several anchor rings 7 next to each other, which can be done on a special simple way when, as shown in figure 2, the outer circumference of the anchor ring 7 is rectangular or square. Figure 2 and Figures 5-12 show that, apart from small edge areas which in Figure 2 belong to the fitting pieces 4<1>, the entire light opening in the grommet is available for the passage of wires 1, so that with the grommet according to the invention an optimal large useful surface at the same time that the implementation takes up little space in the framework. Figure 4 shows a design example of the penetration in a steel wall 3.2. The wall 5 is formed here by a pyramidal or frustoconical sleeve 24 which is welded into the wall 3.2 at 25. The sleeve 24 has a fastening flange 26 at its widest end, and as shown the sleeve passes through the wall 3.2. On the side of the fastening flange 26 facing away from the sleeve 24, there are tension bolts 27 for the tension flange 6. The tension bolts 27 carry tension nuts 28 which via washers 29 press against the tension flange 6 •

Claims (17)

1. Passthrough for wires (1), such as cables, pipe or similar in a wall opening (2), consisting of fully or partially elastic fitting pieces (4,4J) which fill the l space in the wall opening (2) and seal the mother* lines (1) and j against the wall (5) in the wall opening (2), as the fitting pieces (4) form cable receptacles (120) whose shape and size are adapted to the individual cable cross-sections, and further consisting of a pressure device which causes an elastic pressing of the fitting pieces into the wall opening ( 2), characterized in that the light opening of the wall opening (2) decreases from one side of the wall towards the other side of the wall, as the wall rafters (5) have a pyramidal or truncated cone-like course, and in that the pressure device on the side of the wall where the largest opening cross-section is found has a running along the circumference of the opening clamping flange (6) which from the edge of the wall opening partially <e> t grips over the fitting pieces on their end side and presses the fitting pieces axially into the wall opening (2). 2. Implementation according to claim 1, characterized in that the fitting pieces (4) in the radial direction as continuous sector or sector section-like units complete the cross-section of the wall opening (2) and have from the surfaces adjacent to the wall (114) and inwards towards the axis of the wall opening (115 ) continuous separating surfaces (16.1, 16.2, 16.3) and in that at least one of the cable receptacles (120) is arranged at one of these separating surfaces (16.1, 16.3), as this separating surface can end in the respective cable receptacle (120) or cut the cable receptacle (120). 3. Implementation according to claim 2, characterized in that the separating surfaces (16.1, 16.2) extend to the axis (115) of the wall opening (2). 4. Implementation according to claim 2, characterized in that the separating surfaces (16.1, 16.2) extend to one of the fitting pieces (4) surrounded by a central recess (117). 5. Implementation according to claim 4, characterized in that a clamping anchor (119) is arranged in the central recess (117) which connects two clamping flanges (200), which clamping flanges on the two axial ends of the fitting pieces (4) engage radially beyond them by the fit-piece edges surrounding the central recess (117). 6. Implementation according to claim 2, characterized in that all separating surfaces (16.3) end in a respective cable receptacle (120), and in that the fitting pieces (4) are designed as one with each other in the central area (210) between these cable receptacles ( 120). 7. Implementation according to claim 1, characterized in that in the case of a metal, particularly a steel wall (2), the wall (5) of the wall opening is formed by the mantle of a pyramidal or truncated cone-shaped sleeve (24) which is inserted into the wall (3.2). 8. Implementation according to claim 7, characterized in that the sleeve (24) has a fastening flange (26) which abuts the wall (3.2) and protrudes through the wall (3.2) at its larger cross-sectional sleeve edge, and in that on the side facing away from the sleeve of the fastening flange (26) are arranged clamping bolts (27) for the clamping flange (6). 9. Implementation according to claim 1, characterized in that, in the case of a brick or concrete wall (3.1), the wall (5) of the wall opening is formed directly by at least a section of the wall opening (2) itself. 10. Implementation according to claim 9, characterized in that the wall (5) of the wall opening at the edge located at the larger cross-section faces an anchor ring (7) which is inserted into the wall opening (2) flush with the wall surface, the clamping flange (6) can be tensioned against the anchor ring (7) to thereby press against the fitting pieces (4, 4'). 11. Implementation according to claim 10, characterized in that the anchor ring (7) at its inner peripheral surface has an internal thread part (8) in which the clamping flange (6) fits with an external thread part (9). 12. Implementation according to claim 11, characterized in that the clamping flange (6) has a collar (11) with the external thread part (9), the fitting pieces (4,4') having fold-like recesses (12) for the collar, so that it in these recesses (12) gripping collar (11) can grip ring-shaped around the fitting pieces (4,4'). 13. Device for producing a wall (5) in a penetration in a concrete wall (3.1) according to claim 1, characterized by a casing pipe (13), a thus releasably screwed together shaped tube (14) which forms the later wall (59), which shaped tube (14) is made with a confluent outer wall in accordance with the desired design of the wall (5) in the direction of the casing (13), and at the anchor ring (7) , which anchor ring sits on the end of the form pipe (14) facing away from the casing pipe (13) and detaches from the form pipe (14) when the form pipe, after the device has been cast into the concrete wall (3.1) and the concrete has hardened, is unscrewed from the casing pipe (13 ), thereby exposing the wall of the opening (5). r 14. Device according to claim 13, characterized in that the shaped pipe (14) in addition to being screwed together with the casing pipe (13) is also screwed together with the anchor ring (7), both threads (8, 15) having the same thread direction and the same thread pitch ^ . 15. Device according to claim 13 or 14, characterized in that the casing pipe (13), seen from the form pipe (14), on the far side of the screw connection between these two pipes has outwardly directed protrusions (18) for anchoring the casing pipe (13) in the concrete wall ( 3.1). Device according to one of the claims (13-15), respectively implementation according to one of the claims 10 or 11, characterized in that the anchor ring (7) has a projection (22) protruding from the edge side which is designed for anchoring in the wall (3.1) and/or for joining several anchor rings next to each other. 16. Device according to one of the claims 13-15, respectively one of the claims 10 or 11, characterized in that the anchor ring (7) has on the edge a projecting projection (22) which is designed for joining several anchor rings next to each other and for anchoring in the wall (3.1). 17. Device or implementation according to claim 16, characterized in that the outer circumference of the anchor ring (7) is right-angled or square.