Pipe connection device with a seal support

Abstract

The invention relates to a pipe connection device for forming a sealing pipe connection which secures against a pull-out, comprising: - a collar (1) for receiving a pipe end (2), - a clamping body (3) which has an annular design in particular, - at least one clamping means (4), in particular multiple screws distributed along the clamping body (3), - a clamping ring (6) which is composed of multiple elements (5) movably arranged relative to one another and which comprises an adjustable internal diameter, and - a seal (7) for sealing the pipe connection, wherein - the clamping ring (6) is designed such that by clamping or tightening the clamping means (4), the clamping ring is clamped between the collar (1) and the clamping body (3) and is pressed in the direction of the pipe end (2), - a collar section (9) of the seal (7) extends annularly between the collar (1) and the clamping ring (6) in order to seal said region, and - an annular seal support (10) is provided between the seal (7) and the clamping ring (6).

Description

In the present configuration of the pipe connection device, the gap between the clamping ring 6 and the pipe end 2 in particular must be sealed. For this purpose, the seal 7 comprises a pipe portion 15 which runs between the clamping ring 6 and the pipe end 2 and is clamped when the pipe connection is established. If no pipe end 2 is inserted in the pipe connection device, the pipe portion 15 of the seal 7 preferably runs annularly along the inside of the clamping ring 6. If the clamping ring 6 is pushed towards the pipe end 2, the seal 7, in particular its pipe portion 15, is also clamped between the clamping ring 6 and the pipe end 2, thereby creating a sealing. Preferably, the seal abuts with its pipe portion 15 along a closed, circular contour on the pipe end 2 in this position. In order to seal the region between sleeve 1 and clamping ring 6, the seal 7 has a sleeve portion 9, which runs between the sleeve 1 and the clamping ring 6. The sleeve portion 9 of the seal 7 is preferably clamped between the clamping ring 6 and the sleeve 1 in the mounted position. To improve the sealing effect, a seal carrier 10 is provided between the seal 7, in particular between the sleeve portion 9 of the seal 7, and the clamping ring 6. In the present embodiment, the seal carrier 10 is of annular design. Optionally, the seal carrier 10 is an integral ring. Optionally, the seal carrier 10 is a ring composed of several segments. Preferably, in all embodiments, the seal carrier 10 has a substantially smooth outer surface facing 2021403642   12 Sep 2026 in the direction of the seal 7, which in the case of an assembled seal carrier 10 has abutting points. The abutting points are preferably as smooth as possible and designed to overlap. This smooth design of an annular surface can form a substantially closed, in particular smooth abutment surface for the seal 7 or its sleeve portion 9. In the present embodiment, the seal carrier 10 is coupled to the sleeve 1 in the axial direction 13. This means that when the clamping ring 6 is moved towards the pipe end 2, the seal carrier 10 does not change its position in the radial direction 11 relative to the sleeve 1. The seal carrier 10 thus remains immobile when the clamping ring 6 moves relative to the sleeve 1. In this way, the sealing effect can be maintained even if the clamping ring 6 or its links 5 move during tensioning and / or tightening. In particular, due to the coupling of the seal carrier 10 with the sleeve 1, the seal 7 also remains immobile with respect to the sleeve 1 when the clamping ring 6 moves. This allows a substantially firm bond to be formed of the seal 7 clamped between the sleeve 1 and the seal carrier 10 when the clamping ring 6 is in motion. In order to couple the seal carrier 10 to the sleeve 1, a protrusion 14 and a clearance 12 are provided in the present embodiment. The protrusion 14 engages in the clearance 12 in order to establish a positive coupling in the axial direction 13. Generally, any conventional device may be used to couple the seal carrier 10 to the sleeve 1. In the present embodiment, the seal carrier 10 comprises a protrusion 14 projecting into a clearance 12 of the sleeve 1. In particular, the clearance 12 is formed as an annular groove and the protrusion 14 is formed as an annular protrusion that engages in the annular groove. In the present embodiment, the seal 7, in particular its sleeve portion 9, also extends into the region between the protrusion 14 and the clearance 12. In particular, if the clearance 12 and the protrusion 14 are annular, the seal 7 is squeezed annularly in this region, which may improve the sealing effect. Preferably, the seal 7 with its sleeve portion 9 extends over the entire outer surface of the seal carrier 10 facing towards the sleeve 1. However, in accordance with the idea of the invention, the sleeve portion 9 of the seal 7 only runs along an annular portion of the seal carrier 10. To improve the sealing effect of the seal 7, the sleeve portion 9 and the pipe portion 15 of the seal 7 are sealingly connected to each other. A connecting portion 16 of the seal 7 is provided for this purpose. The connecting portion 16 connects the pipe portion 15 and the sleeve portion 9 of the seal 7 in such a way that no medium can escape in this region. When the inner diameter of the clamping ring 6 is adjusted, there is usually also a displacement of the pipe portion 15 of the seal 7. In order to be able to maintain the sealing effect in this case, the connecting portion 16 of the seal 7 is designed in such a way that it allows a relative movement of the pipe portion 15 with respect to the sleeve portion 9 while maintaining the sealing effect. In the present embodiment, the connecting portion 16 is formed as an annular gusset. The gusset 2021403642   12 Sep 2026 serves as a sort of material reservoir to compensate for the relative movement of the pipe portion 15 with respect to the sleeve portion 9. In particular, two substantially parallel annular portions of the seal 7 are sealingly connected to each other in the outer region and are each connected at their other ends to the sleeve portion 9 and to the pipe portion 15, respectively. The connecting portion 16 is thereby designed to be flexible. Alternatively, an elastically deformable or stretchable connecting portion 16 may be provided for smaller relative movements. To improve the extraction safety, the pipe connection device preferably comprises several securing wedges 8. These securing wedges 8 are attached to the links 5 of the clamping ring 6. If there is an extraction force of the pipe end 2 or an extraction movement, which takes place from left to right in the present figure, the securing wedges 8 help to improve the extraction safety. In all embodiments, it is preferably provided that the clamping ring 6 is supported on the pipe end 2 via the securing wedges 8. Preferably, in all embodiments, the clamping ring 6 abuts on the pipe end 2 exclusively with its securing wedges 8. Furthermore, the seal 7 also abuts on the pipe end 2 in order to create a sealing. Preferably, in all embodiments, the securing wedges 8 have teeth that improve the connection between the securing wedge 8 and the pipe end 2. The securing wedges 8 are attached to the links 5 of the clamping ring 6 so as to be displaceable in the direction of extraction, in particular in the axial direction 13. The securing wedges 8 are considered to be movable in the axial direction 13 even if they are moved obliquely to the axial direction 13, since they nevertheless have at least one component of their movement in the axial direction 13. In order to avoid a displacement of the securing wedges 8 from their base position before connecting them to the pipe end 2, the securing wedges 8 are held in their base position, as shown in the illustration of Figure 3. In particular, holding elements 24 are provided to hold the securing wedges 8 in their base position on the links 5. However, these holding elements 24 are designed in such a way that they allow movement of the securing wedges 8 relative to the links 5 when a certain holding force is overcome. This holding force is so small that the effect of the securing wedges 8 is not impaired. Generally, the securing wedges 8 are guided on the links 5, so that they can be optionally extracted from the clamping ring 6. In the present embodiment, braking elements 18 are provided which generate an increasing counterforce against the extraction as the extraction path of the securing wedges 8 progresses. If the pipe end 2 is moved by an extraction force, the securing wedges 8 follow the movement of the pipe end 2. However, due to the wedge-shaped design, they are pushed towards the pipe end 2 and thus increase the holding force against the pipe end 2. Braking elements 18 are provided to prevent the securing wedges 8 from being extracted from the links 5 in case of excessive relative movement. In particular, in combination with a plurality of 2021403642   12 Sep 2026 securing wedges 8 braked by braking elements 18, the securing wedges 8 can be prevented from being extracted from the links 5 without, however, requiring a positive hard stop for this purpose, which is often a disadvantage in the case of high extraction forces. Rather, the securing wedges 8 are braked with a steadily or progressively increasing braking force. Generally, there are different ways of implementing a braking element 18 that acts in this way. In the present embodiment, the braking elements 18 are designed as braking wedges 19. The braking wedges 19 increase the frictional force between the links 5 and the securing wedges 8 as the extraction progresses, thus also increasing the counterforce against the extraction. Alternatively, the braking elements 18 may be elements that deform elastically or plastically when the securing wedges 8 are extracted. A guiding device 17 is provided for connecting and / or guiding a securing wedge 8 to a link 5. The guiding device 17 is preferably arranged to provide a guided bearing of the securing wedge 8 on a link 5 along a degree of freedom. The guiding device 17 preferably comprises a guiding rail 20 and a guiding clamp 21. The guiding clamp 21 engages around the guiding rail 20 to provide substantially linear guidance or guidance along a degree of freedom. In the present embodiment, the guiding rail 20 is arranged on the link 5 and the guiding clamp 21 is arranged on the securing wedge 8. In general, however, a kinematic reversal would also be conceivable. In the present embodiment, the braking wedges 19 are arranged in such a way that, in addition to increasing the frictional forces, they also increase the pitch of the guiding rail 20. Figures 4a and 4b show two views of a securing wedge 8, in particular the securing wedge 8 of Figures 1, 2 and / or 3. In this embodiment, the securing wedge 8 comprises the guiding clamp 21, which is arranged or suitable to engage around the guiding rail 20 of the link 5, which is not shown, and thereby to achieve displaceability or guiding. In particular, it is provided that the guiding clamp 21 has entry slopes or is designed to be elastic in such a way that the guiding clamp 21 and / or the securing wedge 8 are clippable onto the guiding rail 20. Optionally, the guiding clamp 21 may comprise at least one slot 26 or, as in the present embodiment, two slots 26, so that rigidity is reduced and clipping is facilitated. In particular, the guiding clamp 21 has at least one undercut 25 in which the guiding rail 20 is guided so as to prevent the securing wedges 8 from being easily extracted in the radial direction 11. However, an attachment by overcoming a force during clipping in radial direction 11 may be made possible by the present design. Figure 5 shows a schematic view of a link 5 of a clamping ring 6 with the securing wedge 8 removed. Optionally, the link 5 according to Figure 5 may be used in the pipe connection devices according to Figures 1, 2 and / or 3. The link 5 comprises a guiding rail 20. This guiding rail 20 is adapted to engage with the guiding clamp 21 and, in particular, to engage with lateral elements in the undercut 25 of the guiding clamp 21. The guiding device comprises a braking element 18, which is designed in particular as a braking wedge 19 in this embodiment. The securing wedge 2021403642   12 Sep 2026 8, which is not shown, is in its base position in a first portion 22. In this first portion 22, the securing wedge 8 can move substantially freely along the guiding rail 20 without the braking element 18 exerting a counterforce on the securing wedge 8. In a second portion 23, on the other hand, the braking element 18 is arranged. When the securing wedge 8 moves from its base position into the second portion 23, the braking element 18 generates a counterforce against the extraction movement, which in the present illustration runs from right to left. In all embodiments, the direction of movement of the securing wedges 8, in particular the degree of freedom of the guiding device 17 and / or the guiding rail 20 preferably runs along the direction of extraction obliquely towards the pipe end 2. Figure 6 shows a schematic view of two assembled links 5, which may in particular be links 5 of Figures 1, 2, 3 and / or 5. Figure 6 shows two links 5 fitted together to form a portion of a clamping ring 6. Ring connecting elements 27 are provided to connect the links 5 to each other. These allow the links 5 to move relative to each other in order to be able to form a clamping ring 6 with a variable and / or adjustable internal diameter. In particular, the links 5 have a certain mobility with respect to each other in the circumferential direction due to the ring connecting elements 27. In the present embodiment, for example, protrusions and openings are provided which form ring connecting elements 27 and allow the links 5 to move relative to each other in the circumferential direction. In the axial direction 13 and in the radial direction 11, on the other hand, a positive connection or coupling, possibly with clearance, occurs due to the plurality of ring connecting elements 27. In particular, ring connecting elements 27 may also be clip-shaped, such as in the outer region of the clamping ring 6, so that the clamping ring 6 comprises links 5 which are lined up in a chain shape, but which cannot be separated from each other automatically.

Claims

1. A pipe connection device for forming a sealing and extraction-proof pipe connection, comprising:- a sleeve for receiving a pipe end,- a tensioning body,- at least one tensioning means,- a clamping ring with an adjustable inner diameter comprising several links which are arranged so as to be movable relative to one another,- a seal for sealing the pipe connection, and- securing wedges arranged on the links so as to be displaceable along the direction of extraction via a guiding device for securing the pipe end against extraction,- wherein the clamping ring is designed in such a way that it is pressed between the sleeve and the tensioning body and pressed towards the pipe end by tensioning and / or tightening the tensioning means,- wherein the seal with a sleeve portion extends annularly between the sleeve and the clamping ring to seal the region between the sleeve and clamping ring, wherein- an annular seal carrier is provided between the seal and the clamping ring, the clamping ring slidingly abuts on the seal carrier when the internal diameter is changed.

2. The pipe connection device according to claim 1, wherein the seal abuts the seal carrier and / or the sleeve at least along a continuous circumferential line.

3. The pipe connection device according to claim 1 or 2, wherein the seal carrier is coupled in the radial direction to the tensioning body and remains immobile with respect to the tensioning body when the internal diameter of the clamping ring is changed.

4. The pipe connection device according to one of claims 1 to 3, wherein the position of the sleeve portion of the seal and the position of the tensioning body relative to the tensioning body remain unchanged when the inner diameter of the clamping ring is changed.

5. The pipe connection device according to one of claims 1 to 4, wherein the seal carrier and the sleeve are positively coupled to one another via a clearance and a protrusion projecting in the axial direction into the clearance and wherein the protrusion is provided on the seal carrier and the clearance is provided on the sleeve.

6. The pipe connection device according to claim 5, wherein the protrusion is designed to be annularly circumferential and the clearance is an annular groove.2021403642   12 Sep 20267. The pipe connection device according to claim 5 or 6, wherein- the seal extends between the protrusion and the clearance,- and / or the seal extends into the region between the protrusion and the clearance,- and / or the seal completely fills the region between the protrusion and the clearance.

8. The pipe connection device according to one of claims 1 to 7, wherein the seal is arranged with a pipe portion on the inside of the clamping ring in order to seal the gap between the clamping ring and the pipe when the pipe end is inserted.

9. The pipe connection device according to claim 8, wherein the pipe portion of the seal is designed in such a way that it abuts the pipe end at least along a continuous circumferential line.

10. The pipe connection device according to claim 8 or 9, wherein the seal comprises a connecting portion via which the sleeve portion and the pipe portion of the seal are sealingly connected to each other, and wherein the connecting portion, the sleeve portion and the pipe portion of the seal are integrally formed.

11. The pipe connection device according to claim 10, wherein- the connecting portion of the seal is designed in such a way that it allows the pipe portion to move in the axial direction with respect to the sleeve portion while maintaining the sealing effect,- and / or the connecting portion is formed as an annular gusset portion.

12. The pipe connection device according to one of claims 1 to 11, wherein the seal carrier is formed of several parts and comprises several segments which, when assembled, form a smooth, substantially continuous side facing towards the sleeve portion of the seal.

13. The pipe connection device according to one of claims 1 to 12, wherein the clamping ring comprises a plurality of securing wedges arranged on the links so as to be displaceable along the direction of extraction for securing the pipe end against extraction.

14. The pipe connection device according to claim 1, wherein the tensioning body is annular.

15. The pipe connection device according to claim 1, wherein several screws are distributed along the tensioning body.2021403642   12 Sep 202617. The pipe connection device according to claim 9, wherein the pipe portion of the seal is designed in such a way that it abuts the pipe end along an annular uninterrupted surface.

Images