AT522944B1 - Seal assembly and pipe assembly - Google Patents

Abstract

Sealing arrangement (50), comprising a pinch seal (2) with an elastic sealing element (51) and a tube (30) for receiving the pinch seal (2), the pinch seal (2) having a clamping element on each of the two axial sides of the elastic sealing element (51). (52) for radially pressing the sealing element (51) onto the pipe (30). To simplify assembly, the tube (30) has a first area with the constant inner diameter (53) and a second area adjoining the first area, the second area having an inner cone (37) with a second inner diameter (54) at the narrowest Includes location of the inner cone (37), which inner cone (37) serves to prevent the pinch seal (2) from being pushed out when the sealing element (51) is pressed on.

Description

description

SEAL ARRANGEMENT

The invention relates to a sealing arrangement comprising a pinch seal with an elastic sealing element and a tube for receiving the pinch seal, wherein the pinch seal comprises a clamping element for radially pressing the sealing element on the tube on both axial sides of the elastic sealing element.

Such an arrangement is known for example from AT 233 227, which discloses a wall duct (lining) for installation pipes, wherein the installation pipe is sealed against the liner by a pinch seal. To position the pinch seal in the liner, a Z-shaped spacer bracket is provided, which engages behind the face of the liner with its free end and thus prevents the pinch seal from being pushed out in the direction of the outside.

A pinch seal with axial clamping elements is also known, inter alia, from DE 8 615 929 U1 and DE 10 2015 219 599 A1. The prior art also includes casings with stuffing box arrangements (DE 1 855 305 U) and various pipe connections with compressible conical seals, such as those according to CH 408 566 A, CH 439 891 A and DE 8 230 843 U1.

One-piece and two-piece casings are known from US 2003/0192269 A1, KR 101500262 B1, US 2010116359 A1 and EP 1 462 706 A1.

The publication WO 2007/082364 A1 relates, for example, to a bushing with a tubular element made of two sleeves that can be slid into one another and can be locked in different relative positions by means of positive-locking elements.

[0006] US Pat. No. 5,405,119 A also relates to a bushing with two sleeves that can be slid into one another, with a clamp being arranged on the inner of the two sleeves, which represents a stop for pushing on the outer sleeve. A rubber band pulls the outer sleeve into this stop. In this case, however, it is not possible to change the length of the pipe without tools.

[0007] The document EP 2 899 332 B1 relates to a two-part manhole lining which, with a locking device between the two manhole lining parts, enables the length to be adjusted. The two parts are connected to each other without a seal, which can lead to concrete laitance penetrating.

[0008] The document EP 2 338 658 B1 relates to sealing packings from which a casing tube can be produced by connecting it to a piece of pipe of any length. A sealant is provided between the sealing assembly and the connecting pipe. However, manual cutting of the pipe is required here.

The invention is based on the object of specifying a sealing arrangement which, with a simple structure and simple, cost-effective manufacturability, is easy to assemble and enables a permanently sealed implementation.

The object is achieved with a sealing arrangement of the type mentioned at the beginning according to the invention in that the tube has a first area with a constant inner diameter and a second area adjoining the first area, the second area having an inner cone with a second inner diameter includes the narrowest point of the inner cone, which inner cone serves to prevent the pinch seal from being pushed out when the sealing element is pressed on.

The manufacture and assembly of the arrangement according to the invention is simpler and cheaper than those according to AT 233 227, since the additional Z-shaped spacer angle can be dispensed with. In addition, the cone results in a two-dimensional transmission of force between the pinch seal and the casing, resulting in relatively low material stress

secured against ejection over very long standing times.

The inner cone preferably forms the area of the tube with the smallest diameter. The inner cone tapers the tube preferably by a maximum of 10%, more preferably by a maximum of 5%, particularly preferably by a maximum of 3%. The taper refers to the first inner diameter immediately adjacent to the inner cone and the second inner diameter at the narrowest point of the inner cone.

The tube of the seal assembly may form part of a casing assembly (particularly the second tube of the casing assembly described below), or preferably forms a casing. The cone tapers in particular from a spigot end to a flanged end of the pipe and thereby acts as a safety device for the insertable element being pushed out, for example from the outside of the building inwards.

The tube assembly described below is designed in particular as a casing assembly. The casing arrangement is used, for example, for casting concrete in a wall or floor element to keep a through-opening free.

The tube assembly includes a first tube and a second tube. The first pipe has a socket. The second tube can be inserted into this sleeve of the first tube. The second tube has the sealing arrangement described.

Furthermore, the tube arrangement comprises at least one locking ring as a stop for the first tube. The at least one locking ring is placed on the second tube. When the two tubes are plugged into one another, the first tube is in contact with the locking ring. As a result, the locking ring determines the length of the tube assembly. To shorten the length of the pipe arrangement, the at least one locking ring can be pulled off, so that after the locking ring has been pulled off, the pipe can be inserted further into the first pipe and abuts a second locking ring or abuts an end stop.

In a preferred embodiment it is provided that the second tube on the outside diameter or the first tube on the inside diameter has an end stop for the other tube, the end stop determining the shortest length of the tube assembly when all locking rings are removed.

For the sake of simplicity, the configuration of a locking ring is usually described below. However, it is always preferred that multiple locking rings are used and the multiple locking rings are designed and/or arranged according to the description of one locking ring.

Different variants are preferably provided for the axial fixation of the individual locking ring on the second tube:

According to a first variant, the locking ring is arranged in a groove in the second ring. The groove can correspond to the width of the locking ring. Alternatively, it is provided that the locking ring has an annular extension pointing radially inwards. This extension is designed much narrower than the rest of the locking ring. Accordingly, the groove for the axial fixation of the locking ring can also be made correspondingly narrow. In this case, only the radially inward-pointing extension of the locking ring sits in the groove.

According to a further variant it is provided that the second ring has a shoulder against which the corresponding locking ring rests. Ultimately, the locking ring only has to prevent a further axial pushing together of the two tubes in a form-fitting manner. In the opposite direction, namely in the direction in which the two tubes are pulled apart, the locking ring does not necessarily have to be positively secured. It is therefore also sufficient that the corresponding locking ring rests against a shoulder of the second ring.

In addition, it is possible that the locking ring bears against a further locking ring for its axial fixation. This further locking ring is then correspondingly fixed axially in a groove, on a shoulder or on yet another locking ring.

The tube assembly preferably includes one, two, three, four or five of the locking rings.

By removing the appropriate number of locking rings, the length of the tube assembly can be incrementally reduced.

It is preferably provided that the locking ring can be removed without tools. The locking ring can be gripped by hand by the fitter and, in particular, can be pulled off perpendicularly to the axial extent of the pipe arrangement.

The locking ring particularly preferably has a handle for manually gripping and removing the locking ring. An opening width is preferably defined on the handle. This opening width is preferably at least 3 cm, in particular at least 5 cm. Due to this correspondingly large opening width of the handle, the fitter can reach into the handle with several fingers and pull it off. Preferably, the handle is formed such that its opening width extends perpendicularly to the axial direction of the tube assembly.

In a preferred embodiment, the entire locking ring is made in one piece, in particular from plastic. In particular, the optionally used handle is also a one-piece component of the remaining annular portion of the locking ring.

Alternatively or in addition to the handle, the locking ring can also have a tool opening. This tool opening is designed in particular to accommodate a tip of a hammer (carpenter's hammer/lattice hammer). By inserting the tool into the tool opening, you can pull on the tool and thus remove the locking ring.

The locking ring is in particular designed so that it can be removed non-destructively. This also makes it possible, in particular, to place the locking ring back on the second tube if it is removed by mistake.

In particular, the locking ring is designed as an open ring. The locking ring preferably extends over at least 200° of the second tube, in particular over at least 250°.

It is preferably provided that the tube arrangement between the two tubes has a full-circumferential sealing means, in particular an elastomeric sealing ring. The first pipe particularly preferably has a bead, in particular in the area of the socket. The all-round sealant is arranged in this bead. This sealant provides a seal, in particular, against the concrete laitance, which could otherwise penetrate between the two pipes when the pipe arrangement is cast.

Furthermore, it is preferably provided that the first tube and/or the second tube has/have a full-circumferential sealing means, in particular in the form of an elastomer sealing ring, on the outer circumference. This external seal seals against the ingress of water at the interface between the pipe arrangement and the concrete wall and thus prevents moisture from penetrating further into the interior of the wall. In particular, it is provided that the external sealant is guided in a circumferential groove in order to prevent displacement in the axial direction during concreting.

Furthermore, it is preferably provided that at least one of the two tubes comprises a disk spring section. This disk spring section is used for axial tolerance compensation. In particular, tolerances in the formwork distances can be accommodated and the sealing edges on the flanges are always pressed against the formwork walls.

The disk spring section connects two pipe sections. The two pipe sections differ in particular in their diameters. The disk spring section is in particular designed with thinner walls than the two pipe sections; Additionally or alternatively, the disc spring section can be made of a less rigid material than the tube sections. In particular, the tube sections and the disk spring section are manufactured in one piece. The disk spring section extends in particular at an angle of up to plus/minus 45° to the perpendicular to the axial direction.

[0034] The second tube has the inner cone of the sealing arrangement as a push-out safeguard for the insertable element. This element that can be used is in particular a crush

tion. The cone tapers in particular from the spigot end to the flanged end of the second tube and thereby acts as a safety device for the insertable element being pushed out, for example from the outside of the building inwards. If there is water from the outside of the building wall, the insertable element is pushed against the cone and prevented from pushing through due to the narrowing of the cross section. The inner cone preferably forms the area of the second tube with the smallest diameter. The inner cone tapers the second tube preferably by a maximum of 10%, more preferably a maximum of 5%, particularly preferably a maximum of 3%. The taper refers to a first inner diameter immediately adjacent to the inner cone and a second inner diameter at the narrowest point of the inner cone.

Preferably, the first tube and/or the second tube each includes a flange. The flange and the remaining part of the corresponding tube are preferably made in one piece, in particular by injection molding from plastic.

In the following, the formation of a flange is described in particular. However, flanges are preferably provided on both tubes. Preferably, both flanges can have one or more of the preferred configurations.

[0037] Thus, the flange on the inner diameter preferably comprises at least one bayonet fastening element. This bayonet catch element is used in particular for fastening a cover, in particular a dummy cover.

The flange preferably has holes, in particular nail holes, on its outer circumference for attachment to a formwork. This allows the pipe arrangement to be fixed to the formwork during concreting.

Furthermore, the flange preferably comprises one or more axially protruding sealing edges. The sealing edges are, in particular, one-piece components of the flange, which protrude in the axial direction and rest against the formwork during concreting. As already described, the plate section is preferably provided, which ensures that the sealing edges lie tightly against the formwork.

At least one sealing edge is particularly preferably provided radially outside the holes (pin holes).

Further details, advantages and features of the present invention result from the following description of an embodiment with reference to the drawing. It shows:

[0042] FIG. 1 shows a pipe arrangement according to the invention with a sealing arrangement according to an exemplary embodiment,

[0043] FIG. 2 shows a first tube of the tube arrangement according to the invention according to the exemplary embodiment,

[0044] FIG. 3 shows a second pipe with a sealing arrangement of the pipe arrangement according to the invention according to the exemplary embodiment,

[0045] FIG. 4 details of the second pipe with sealing arrangement, and [0046] FIG. 5 a detail of the first pipe.

A pipe arrangement 1, designed as a casing pipe arrangement, and a sealing arrangement (50) are described in detail below with reference to FIGS. Reference is always made to all figures.

The tube arrangement 1 comprises a first tube 10 and a second tube 30. The two tubes 10, 30 can be pushed into one another. Figure 1 shows the position of the two tubes 10, 30 in a coaxial, but not yet pushed together position.

The first pipe 10 comprises a socket 11 at one end and a flange 16 at the opposite end. A bead 12 is formed on the socket side. A circumferential sealant (not shown) is arranged in the bead 12 . This sealant in the bead 12 seals

compared to the retractable second tube 30 from.

[0050] Furthermore, the first pipe 10 comprises a circumferential sealing means 13 on its outer circumference, which is guided in a corresponding groove. The external sealant 13 seals against the concrete wall or the concrete floor.

In addition, the first tube 10 includes a disk spring section 14 for axial tolerance compensation. This disk spring section 14 is shown in detail in FIG. According to the schematic representation in FIG. 5, the first tube 10 has two tube sections 15 . The two tube sections 15 are connected to one another via the disk spring section 14 . The wall thickness of the plate spring section 14 is less than the wall thickness of the two tube sections 15. The plate spring section 14 extends essentially perpendicular to the axial direction, ie in the radial direction.

In particular, the representation in Figure 2 shows the design of the flange 16 of the first pipe 10. The flange 16 has a plurality of axially extending holes 17 on its circumference. These holes 17 are designed in particular as nail holes and are used to fix the flange 16 to a formwork.

Furthermore, the flange 16 comprises two peripheral sealing edges 18. The holes 17 are located between the two sealing edges 18. The sealing edges 18 are used for sealing against a formwork.

FIG. 2 also shows the arrangement of bayonet fitting elements 19 inside the flange 16. These bayonet fitting elements 19 are used, for example, to fix a dummy cover.

In the exemplary embodiment shown, the second tube 30 comprises two grooves 31 for the axial fixing of one locking ring 32 each.

The respective locking ring 32 has an annular extension 33 that extends radially inward. Measured in the axial direction, the extension 33 is significantly narrower than the rest of the locking ring 32. The grooves 31 are also designed to be correspondingly narrow. The locking rings 32 sit with the narrow extensions 33 in the narrow grooves 31.

The locking rings 32 are designed as open rings and can thus be detachably removed without destroying them.

The locking rings 32 include a handle 34 for tool-free removal. The handle has a relatively large handle width 35, so that the handle 34 can be gripped with several fingers.

When the two locking rings 32 shown are on the second pipe 30, the two pipes 10, 30 can be pushed into one another until the first pipe 10 hits the left locking ring 32. If the left-hand locking ring 32 is removed, the two pipes 10, 30 can be pushed into one another until the first pipe 10 abuts against the right-hand locking ring 32.

In particular, FIG. 3 shows that the second tube 30 also has a flange 36 . Here, like the flange 16, the flange 36 includes two circumferential sealing edges 18. Inside the flange 36 there are also bayonet locking elements 19, for example for a dummy cover. The holes 17, in particular nail holes, are usually only formed on one of the two flanges 16, 36, but can also be provided on both flanges 16, 36.

Figure 4 shows purely schematically in the upper representation the design of an inner cone 37 in the second tube 30. The lower representation in Figure 4 shows that an inserted element, here a pinch seal 2, can be secured on this inner cone 37 against being pushed out. As an alternative to the inner cone 37, a corresponding shoulder can also be used in the second tube 30 to prevent the pinch seal 2 from being pushed out.

Furthermore, Figure 4 also shows the sealing arrangement 50 described separately, comprising the tube 30 for receiving the pinch seal 2, the tube 30 having the inner cone 37

having. The pinch seal 2 comprises a tensioning element 52 on each of the two axial sides of an elastic sealing element 51 . The two tensioning elements 52 are braced against one another, as a result of which the sealing element 51 is radially squeezed against the inner cone 37 .

The inner cone 37 forms the area of the tube 30 with the smallest diameter. The inner cone tapers the tube 30. The taper refers to a first inner diameter 53 immediately next to the inner cone 37 and a second inner diameter 54 at the narrowest point of the inner cone 37.

In addition to the above written description of the invention, reference is hereby explicitly made to the graphic representation of the invention in all figures for its supplementary disclosure.

REFERENCE LIST

1 tube arrangement

2 insertable element, especially pinch seal 10 first tube

11 sleeve

12 surround

13 sealant

14 disc spring section

15 pipe sections

16 flange

17 holes

18 sealing edges

19 bayonet locking elements 30 second tube

31 grooves

32 locking rings

33 extension

34 handle

35 grip width

36 further flange

37 inner cone

50 seal assembly

51 sealing element

52 clamping elements

53 first inner diameter

54 second inner diameter

Claims (2)

patent claims A sealing arrangement (50), comprising a pinch seal (2) with an elastic sealing element (51) and a tube (30) for receiving the pinch seal (2), the pinch seal (2) on both axial sides of the elastic sealing element (51), respectively a clamping element (52) for radially pressing the sealing element (51) onto the pipe (30), characterized in that the pipe (30) has a first area with a constant inner diameter (53) and a second area adjoining the first area , wherein the second area comprises an inner cone (37) with a second inner diameter (54) at the narrowest point of the inner cone (37), which inner cone (37) serves to prevent the pinch seal (2) from being pushed out when the sealing element (51) is pressed on. 2. Sealing arrangement according to claim 1, characterized in that the inner cone (37) tapers the tube (30) by a maximum of 10%, preferably a maximum of 5%, particularly preferably a maximum of 3%, the tapering to the first inner diameter (53) directly next to the inner cone (37) and the second inner diameter (54) at the narrowest point of the inner cone (37). 3 sheets of drawings