Leadthrough for a conduit

Abstract

A leadthrough (10) for passing conduits through a constructional component includes a clad tube (11), a base member (16) arranged at the first axial end (12) of the clad tube (11) and having a receiving space (18) for isolating means (19) and defining an opening (17), and first (14) and second (15) annular, diaphragm-shaped sealing elements provided, respectively, at the first (12) and second axial ends of the clad tube (11).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings show:

FIG. 1 a cross-sectional longitudinal view of a conduit leadthrough according to the present invention with a clad tube embedded in a wall; and

FIG. 2 a top view of the leadthrough shown in FIG. 1.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

A leadthrough 10 according to the present invention and which is arranged, as shown in FIG. 1, in a constructional component 30 such as, e.g., a concrete wall, includes a clad tube 11 with an outer thread that extends over the entire longitudinal extent of the clad tube 11. The leadthrough 10 further includes a base member 16 having a receiving space 18 for a isolating means 19. The isolating means 19 in form, e.g., of a ring of an intumescent material, ensures fire protection of the leadthrough 10. The outer sealing of the leadthrough 10 relative to a constructional component 30, which surrounds the leadthrough 10 is effected with a sealing ring 25 provided on the outer surface of the base member 16.

In FIG. 1, the leadthrough 10 is formed as a cast-in part that is secured, before formation of the constructional component 30, on a formwork (not shown) and becomes embedded in the constructional component 30 upon filling the formwork with concrete. To this end, there is provided, on the base member, a flange having attachment openings for securing the base member 16 on the formwork with nails or the like.

The bas member 16 has a first inner thread 23 with which the base member 16 is secured on a first end 12 of the clad tube 11 that is provided with the outer thread 23. Between the base member 16 and the clad tube 11, there is provided an annular, diaphragm-shaped sealing element 14 of a rubber-elastic material and having an inner diameter D2 that is smaller than the inner diameter D1 of the clad tube 11. The diaphragm-shaped sealing element 14 defines the first sealing plane of the leadthrough 10.

At the opposite axial end 13 of the clad tube 11, there is provided another annular, diaphragm-shaped sealing element 15 from a rubber-elastic material and having an inner diameter D3 that is likewise smaller than the inner diameter D1 of the clad tube 11 and that corresponds, within manufacturing tolerances, to the inner diameter D2 of the diaphragm-shaped sealing element 14. The second diaphragm-shaped sealing element 15 defines the second sealing plane of the leadthrough 10.

As particularly shown in FIG. 2, the second diaphragm-shaped sealing element 15 is arranged in a stiff annular member 20 formed of a hard plastic material in which it is secured by so-called material-locking, e.g., by vulcanization or being glued thereto, forming a module. The annular member 20 is secured on the clad tube 11, as shown in FIG. 1, by an annular securing part 21 which also can be formed as a closing cap or cover and which has a second inner thread 24 that cooperates with the outer thread 22 of the clad tube 11 for screwing the member 20 on the second end 13 of the clad tube 11.

When a conduit is passed through a through-opening 17 of the leadthrough 10, e.g., in form of a pipe (not shown), both diaphragm-shaped sealing elements 14, 15 expand, becoming sealingly attached, film-like, to the outer surface of the conduit. The conduit has a diameter that advantageously corresponds to the inner diameter D1 of the clad tube 11. An almost absolute sealing passing of the conduit through the leadthrough 10 is achieved. The openings of the sealing elements 14, 15 can be provided with collars to insure a sufficient contact surface even when small expansion takes place.

Though the present invention was shown and described with references to the preferred embodiment, such is merely illustrative of the present invention and is not to be construed as a limitation thereof and various modifications of the present invention will be apparent to those skilled in the art. It is therefore not intended that the present invention be limited to the disclosed embodiment or details thereof, and the present invention includes all variations and/or alternative embodiments within the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A leadthrough (10) for passing conduits through a constructional component, comprising a clad tube (11) having first (12) and second (13) axial ends; a base member (16) arranged at the first axial end (12) of the clad tube (11) and having a receiving space (18) for isolating means (19) and defining an opening (17); and first (14) and second (15) annular, diaphragm-shaped sealing elements provided, respectively, at the first (12) and second (13) axial ends of the clad tube (11).

2. A leadthrough according to claim 1, further comprising a stiff annular member (20) for mounting the second diaphragm-shaped sealing element (15) on the second axial end (13) of the clad tube (11).

3. A leadthrough according to claim 2, further comprising an annular securing part (21) connectable with clad tube (11) for securing the stiff annular member (20) on the second axial end (13) of the clad tube (11).

4. A leadthrough according to claim 2, wherein the stiff annular member (20) is formed of a hard plastic material.

5. A leadthrough according to claim 2, wherein the stiff annular member (20) is formed of a rubber-elastic material.

6. A leadthrough according to claim 2, wherein the second diaphragm-shaped sealing element (15) is secured within the stiff annular member (20) in material-locking manner.