DE10020493A1 - Device for sealing an annular space delimited by an inner and an outer body - Google Patents

Abstract

The invention relates to a device (10) for sealing an annulus (11) delimited by an inner body and an outer body (12, 13), for sealing pipes, cables, channels or similar in relation to protection pipes, wall channels or similar. Said device is provided with the following: a sealing element (20) which extends over the periphery of the annulus (11) and fills the annulus on the peripheral side; pressure elements (24, 25) which extend on the axially outer front surfaces of the sealing element (20) and clamping means (23) which interact with the pressure element (24, 25) and which axially penetrate the sealing element (20), for axially compressing and radially expanding the sealing element (20). The aim of the invention is to guarantee closeness with greater diameter tolerances and bushing, pipe and bore diameters that have been worked less than optimally, and an appropriate tightness in the event of subsequent settling phenomena. To this end, a layer (29, 30) of hydrophilic rubber which is exposed on the outer and/or inner peripheral side is introduced into the sealing element (20), which consists of an elastomer material and/or between two axially adjacent sealing elements (20) consisting of an elastomer material.

Description

The present invention relates to a device for sealing one of at least one inner and one outer body of limited, for example, ring-like space, especially for sealing pipes, cables, channels or the like against protective pipes, wall breakthroughs or the like, according to the preamble of claim 1 or that of Claim 9.

When calculating and selecting so-called Annulus seals, whether it is Compact seals or link chain seals can  always only the nominal diameter of the media pipes or cables and Wall sleeves or protective pipes or core holes, but not their exact dimensions are taken into account. Pipe tolerances, any small dents in the Pipe surface or impurities in core drilling are in mostly not known during the planning phase and often hide Residual risk for the tightness and reliability of the Sealing system. This residual risk manifests itself in Leaks at the contact surfaces of the usual used elastomeric sealing members, the one hand for Media pipe or cable and on the other hand to the wall sleeve or Protection tube or core hole can occur.

Basically, the calculation is made by selecting one special seal for a specific installation sufficiently large span, which in its different Size depends on the size of the seal, selected. However, such tube combinations can also be used occur where the seal to be used almost at the end their span is. Then there are tolerances in theirs maximum values or slight, almost imperceptible bumps on or is dirty working in the core drilling and the The surface of the core hole cannot be smoothed afterwards the maximum value of the span is exceeded, so that the seal is leaking.  

Another case is the use of annular seals Plastic pipes in which after being braced under the Pressure of the elastomeric sealing elements due to the cold flow tendency of the plastic gives way to the pipe surface. This giving in or flow enlarges the original for calculation annulus used, with a high probability the existing clamping range of the seal is exceeded.

Further risk cases regarding the leakage of such annular seals consists in subsequent Signs of settlement of the building in question or other Building environments of annulus seals.

A device for sealing one of at least one inner ring-like and delimited by an outer body Space of the type mentioned is DE 196 01 288 C2 known. In this known device used several axially lined up sealing elements from which the central sealing element has a lower Shore hardness than has the outer sealing elements. This allows the Sealing elements in axial bracing in different Deform, so that diameter tolerances be balanced in terms of the components used can. However, many of the aforementioned problems are associated with this not to be eliminated.  

The object of the present invention is therefore a Device for sealing one of at least one inner and, for example, ring-like bounded by an outer body To create space of the type mentioned, the one Tightness both with larger diameter tolerances as well in case of not optimally machined sleeve, pipe or Bore diameters as well as with subsequent Settlement phenomena a corresponding tightness guaranteed.

To solve this problem are in a device for Sealing one of at least one inner and one outer body of, for example, ring-like space of the the type mentioned in claim 1 or in claim 9 specified features provided.

With the measures according to the invention is when the used device from the outset or afterwards one or more places is leaking, through which Penetration of moisture gives the guarantee that the hydrophilic rubber swells and thereby the leak closes. This also leads to larger diameter tolerances, in the event of damage and also in the event of subsequent settlement one from the start or afterwards restoring absolute tightness. Such The device is easy to manufacture realize.  

Advantageous embodiments of the elastomer Material existing sealing element inserted layer hydrophilic rubber results from the characteristics of Claim 2 or 3.

When arranging a layer of hydrophilic rubber between two neighboring, made of elastomeric material existing sealing elements are expediently the features of claim 4 and / or 5 given.

According to the features of claim 6 is another Design of the arrangement of the layer made of hydrophilic rubber intended.

If the layer of hydrophilic plastic in one plane can be provided with the contact surface of the sealing elements, are expedient to increase the initial tightness Features provided according to claim 7.

With the features of claim 8 is a better one Differentiation when using the sealing elements of different types.

Further details of the invention are as follows To see description in which the invention based on the in  the embodiments shown in the drawing is described and explained. Show it:

Fig. 1 shows a schematic longitudinal section of an apparatus for sealing a present of an inner and an outer body delimited annular space according to a first preferred embodiment of the invention in use in a wall opening,

Similar to Fig. 2 to 4 in a schematic longitudinal section of a device of FIG. 1, but according to the second to fourth embodiments of the present invention and without application of reference, and

Fig. 5 in a schematic perspective view of a sealing device according to a fifth embodiment of the present invention.

According to FIG. 1, the device 10 , 10 ', 10 ", 10 "' or 10 M shown in the drawing in several exemplary embodiments serves to seal an annular or the like delimited by at least one inner and one outer body 12 or 13 formed space 11. The ring-like or the like formed space 11 can be formed by a wide variety of bodies, for example on the outside by a wall opening (core hole), by a wall sleeve, by a protective tube or the like and on the inside by one or more pipes, channels, cables or the like, as used to carry gas, water, oil or electricity.

The sealing device 10 shown in FIG. 1 is arranged in the core bore 16 of a masonry 17 , through which core bore 16 a metal or plastic tube 12 formed as an inner body is passed. In the core bore 16 of the masonry 17 , a wall sleeve 13 is used which is designed as an outer body and which can be held stationary in the masonry 17 by an annular flange 18 arranged approximately in the center. The sealing device 10 within the core bore 16 or the wall sleeve 13 has a smaller axial length than this.

The sealing device 10 has an annular sealing element 20 made of elastomeric material, which in the exemplary embodiment is in one piece and whose inside or outside diameter corresponds approximately to the outside diameter of the tube 12 or the inside diameter of the wall sleeve 13 . The annular sealing element 20 has a relatively large axial length, for example in the order of approximately 2/3 to 3/4 of the axial length of the core bore 16 . At several, preferably evenly distributed over the circumference of a central ring line, the annular sealing element 20 is provided with a plurality of axial through bores 21 and penetrated by screw bolts 22 by axial clamping means 23 . The clamping means 23 are combined with annular pressure disks 24 and 25 which are arranged on the two axial end faces of the annular sealing element 20 and are penetrated by the screw bolts 22 . Nuts 27 are screwed onto the bolts 22 , which have a head 26 at one end. After the insertion of the annular sealing element 20 , the clamping means 23 are tightened so that the annular sealing element 20 is elastic in the radial direction both to the inner body (tube 12 ) and to the outer body (wall sleeve 13 ) during the axial compression via the pressure plates 24 , 25 evades, which results in a sealing of the annular space 11 with respect to the axially adjacent inner and outer space.

The annular sealing element 20 made of elastomeric material is equipped with several (here three in each case) layers 29 and 30 of hydrophilic rubber arranged uniformly distributed over the axial length of the annular sealing element 20 , both on the outer peripheral side and on the inner peripheral side. In the exemplary embodiment shown in FIG. 1, a plurality of annular grooves 31 and 32 are incorporated for this purpose on the outer circumference side and on the inner circumference side, into which the hydrophilic rubber layers 29 , 30 are inserted. The hydrophilic rubber layers 29 , 30 are on the outside and inside circumferential side in alignment with the adjacent outer and inner circumferential contact surfaces of the annular sealing element made of elastomeric material. The hydrophilic rubber layers 29 , 30 are thus freely accessible from the outer and inner circumferential sides and lie in the contact area between the sealing device 10 and the outer or inner body 13 , 12 .

The hydrophilic plastic layers can be introduced into the ring grooves 31 , 32 in various ways, for example by introducing the hydrophilic rubber as a pasty mass, by injecting the hydrophilic rubber or by forming the hydrophilic rubber as a sealing ring which is inserted into the ring groove 31 , 32 is inserted. In the latter case, a firm connection between the hydrophilic rubber sealing ring and the ring-shaped sealing element 20 can be made by elastic prestressing, gluing or clamping or the like.

The hydrophilic rubber layers 29 , 30 are axially within the end faces of the annular sealing element. The hydrophilic rubber layers 29, 30 therefore only come into effect, if it appears from the axial sides a leak, so that when exposed to moisture to the layers 29, 30 of hydrophilic rubber swells and the annular space 11 reseals.

The sealing device 10 'shown in FIG. 2 is similar to the sealing device 10 according to FIG. 1, but the annular sealing element 20 ' is made axially narrower. The clamping means 23 'and thrust washers 24 ', 25 'are corresponding. The ring-shaped sealing element 20 'is each provided with a semi-elliptically undercut ring groove 31 ', 32 'on the outside or inside circumference and axially centered. In this way, a rubber sealing ring 29 'or 30 ' which is hydrophilic in cross section can be clamped into the undercut annular groove 31 ', 32 '.

In the embodiment of Fig. 3 is the sealing device 10 'formed similarly to the sealing device 10' of FIG. 2. The only difference is in the cross-sectional shape of the here trapezoidal undercut outer and inner annular groove 31 ", 32" and the resultant cross-sectional shape of the outer and inner hydrophilic rubber sealing rings 29 ", 30 ".

In these two exemplary embodiments according to FIGS. 2 and 3, the outer or inner surface of the hydrophilic rubber sealing ring 29 , 29 'or 30 , 30 ' is shown as slightly projecting radially with respect to the outer or inner contact surface of the annular sealing element 20 'made of elastomeric material . It goes without saying that in these two exemplary embodiments one of the types of manufacture and introduction of the hydrophilic rubber layer mentioned for the exemplary embodiment in FIG. 1 is also possible.

In the exemplary embodiment in FIG. 4, the sealing device 10 ″ ″ is provided with two ring-shaped sealing elements 20 ″ ″ arranged axially next to one another and made of elastomeric material.

A hydrophilic rubber layer in the form of a hydrophilic rubber sealing washer 30 '''is provided between these two annular sealing elements 20 '''. This sealing ring disk 30 '''projects in the radial direction both on the outer circumferential side and on the inner circumferential side of the outer or inner contact surface of the annular sealing elements 20 ''', which are identical in their dimensions. The tensioning means 23 ″ ″ accordingly penetrate both annular sealing elements 20 ″ ″ and further pressure disks 24 ″ ″ and 25 ″ ″ arranged at the end face.

The sealing ring disk 30 '''can either be simply stretched between the two annular sealing elements 20 ''' or glued to one of the two or both. It goes without saying that more than two annular sealing elements 20 '''can be provided axially next to one another with the interposition of corresponding layers of hydrophilic rubber sealing ring disks 30 '''.

In a manner not shown, exemplary embodiments corresponding to FIGS. 2 or 3 and 4 can be combined, that is to say the annular sealing elements according to FIG. 4 are provided on their adjoining end faces with complementary half-grooves on the outer and inner circumferential sides, so that the hydrophilic rubber layer introduced both annular sealing elements in the joint area covered both on the outer circumference side and on the inner circumference side.

In the sealing devices 10 , 10 ', 10 "and 10 "''shown in FIGS . 1 to 4, the annular sealing elements 20 , 20 ', 20 "and 20 ""are shown as one-piece compact sealing elements made of elastomeric material. It goes without saying that these ring-shaped sealing elements 20 , 20 ', 20 "or 20 "''can also be designed as a link chain seal, in which each ring-shaped sealing element is composed of a plurality of sealing segments arranged in a link-like manner.

In the embodiment of a sealing device 10 M shown in FIG. 5, the annular sealing element 20 M between the axial openings 21 M for clamping means 23 M is not with a single central recess, but with several, here three, axially continuous recesses 36 , 37 and 38 provided, which serve for the passage of, for example, electrical cables and which are to be sealed within the sealing device 10 M on the outer circumferential side. The sealing device 10 M or the ring-shaped sealing element 20 M is arranged and sealed, for example, within a wall sleeve or the like. The inside and outside sealing is also initially carried out by the clamping means 23 M and the pressure washers 24 M and 25 M.

In this exemplary embodiment, the annular sealing element 20 M is provided with corresponding hydrophilic rubber layers 29 M both on the outer circumferential side as in the exemplary embodiments according to FIGS . 1, 2, 3 or 4, and on the inner circumferential side in each of the axial passage recesses 36 , 37 , 38 with a corresponding hydrophilic Rubber layer equipped with 30 m. The sealing device 10 M can also have more or less of these axial recesses 36 , 37 , 38 . It can also, as shown in FIG. 5, be compact or be slotted in a manner to be sealed for the outer circumferential threading of electrical cables.

It is understood that depending on the cross-sectional shape of the elastomeric sealing elements as well as the hydrophilic rubber layers have angular, oval or the like adapted shapes can.

According to a further embodiment, not shown The present invention is the sealing device with a or provided several annular sealing elements, the longitudinal their entire outer or inner circumferential surface with a hydrophilic plastic layer is populated. According to another not shown embodiment is or are the ring-shaped sealing elements made entirely of hydrophilic rubber built up.

Claims (9)

1. Device ( 10 ) for sealing, for example, a ring-like space ( 11 ) delimited by at least one inner and one outer body ( 12 , 13 ), in particular for sealing pipes, cables, channels or the like against protective pipes, wall openings or the like, with one or more, one-part or multi-part, sealing element (s) ( 20 ) running over the circumference of the annular space ( 11 ) and filling, for example, the annular space on the circumference, with on the axially outer end faces of the sealing element or axially with respect to the annular elements of sealing elements ( 20 ) lying next to one another and pressure elements ( 24 , 25 ) extending with and with the pressure elements ( 24 , 25 ) interacting and axially penetrating these and the sealing element (s) ( 20 ) or clamping elements ( 23 ) for axially compressing and radially expanding of the sealing element or elements ( 20 ), characterized in that an outer and / or inner circumferential side Exposed layer ( 29 , 30 ) made of hydrophilic rubber is inserted into the sealing element ( 20 ) made of elastomeric material and / or interposed between two axially adjacent sealing elements ( 20 ) made of elastomeric material. 2. Device according to claim 1, characterized in that the layer ( 29 , 30 ) made of hydrophilic rubber is formed by a profile ring which is held in an outer / inner circumferential groove ( 31 , 32 ) of the sealing element ( 20 ), for example elastically pretensioned inserted, clamped, glued or the like. 3. Device according to claim 1, characterized in that the layer ( 29 , 30 ) made of hydrophilic rubber is injected into an outer and / or inner peripheral recess of the sealing element ( 20 ). 4. The device according to claim 1, characterized in that the layer ( 29 , 30 ) of hydrophilic rubber is formed by a disc with one or more openings. 5. The device according to claim 4, characterized in that the disc ( 30 ) between the sealing elements ( 20 ) inserted, for example. Pinched, glued or the like. 6. The device according to claim 1, characterized in that the layer ( 29 , 30 ) made of hydrophilic rubber is introduced into an inner and / or peripheral recess between two axially adjacent sealing elements ( 20 ). 7. The device according to at least one of the preceding claims, characterized in that the layer ( 29 , 30 ) made of hydrophilic rubber projects beyond the inner and / or peripheral contact surfaces of the sealing element or elements ( 20 ) in the untensioned state. 8. The device according to at least one of the preceding claims, characterized in that the sealing elements ( 20 ) made of elastomeric material and the layers ( 29 , 30 ) made of hydrophilic rubber have different colors or markings. 9. Device ( 10 ) for sealing a ring-like space ( 11 ) delimited by at least one inner and one outer body ( 12 , 13 ), in particular for sealing pipes, cables, ducts or the like against protective pipes, wall openings or the like, with a or a plurality of one-part or multi-part sealing elements ( 20 ) running over the circumference of the annular space ( 11 ) and filling the annular space on the circumferential side, with on the axially outer end faces of the sealing element or axially next to one another with respect to the annular space lying sealing elements ( 20 ) extending pressure elements ( 24 , 25 ) and with the pressure elements ( 24 , 25 ) interacting and these and the sealing element (s) ( 20 ) axially penetrating clamping means ( 23 ) for axially compressing and for the radial expansion of the sealing element or elements ( 20 ), characterized in that the sealing element ( 20 ) on its outer and / or around catcher-side contact surface is made of hydrophilic rubber or consists entirely of hydrophilic rubber.