AT524050B1 - Pipe connection device with a locking wedge and a braking element - Google Patents

Abstract

Pipe connection device for forming a sealing and pull-out-proof pipe connection, comprising: - a sleeve (1) for receiving a pipe end (2), - a clamping body (3), which is in particular ring-shaped, - at least one clamping means (4), in particular several along the screws distributed around the clamping body (3), - a clamping ring (6) with an adjustable inner diameter, which is composed of several elements (5) arranged to be movable relative to one another, - a seal (7) for sealing the pipe connection, - and several via a guide device (17). securing wedges (8) arranged on the members (5) so as to be displaceable along the pull-out direction to secure the pipe end (2) from being pulled out, - the clamping ring (6) being designed in such a way that it can be locked between the sleeve (1st ) and the clamping body (3) is clamped and pressed in the direction of the pipe end (2), - and wherein at least one safety wedge (8) has a braking element (18) zugeo is rdnet, which generates an increasing counterforce against the extension of the safety wedge (8) as the extension path of the safety wedge (8) progresses.

Description

description

PIPE JOINT WITH A LOCKING WEDGE AND A BRAKE ELEMENT

The invention relates to a pipe connecting device according to the preamble of the independent claim.

Generic pipe connecting devices are known in different embodiments. For example, pipe connection devices are known which are suitable for producing a pipe connection with one pipe end, the pipe connection device being adaptable to pipes with different outside diameters. A common application of such pipe connecting devices is a repair job in which a section of water pipe is to be replaced with a new piece of pipe. Although the nominal diameter, i.e. the inner diameter, of the lines is often known, the outer diameter is not, since the outer diameter depends, for example, on the pipe material used. In order to enable uncomplicated and quick assembly, pipe connection devices of the generic type are suitable for producing a pipe connection with different pipe outside diameters.

[0003] EP 1 292 792 A1 discloses a pipe coupling device which grips and seals pipes with different external diameters. EP 2 090 815 A2 discloses a tube connecting device which has a clamping ring with a plurality of movable members. WO 2015 177 259 A1 also shows a connecting device with a clip between the sleeve and the clamping ring, which can hold a sealing ring. Furthermore, EP 3 486 542 A2 shows a connecting device with a generic design. DE 10 2014 114 959 A1 discloses a pipe connection device with a sleeve-shaped receiving part for receiving a pipe end. In addition, EP 2 354 614 A1 shows a grip ring with a large number of ring-shaped segments.

[0004] Permanent and secure sealing is of great importance, particularly in the case of water pipes. In addition, it is important that the pipe connection device can produce a mechanically stable and pull-out-proof pipe connection. For example, normal pressures of more than 8 bar, sometimes even more than 15 bar, occur in water pipes. In the case of water pipes with large nominal diameters in particular, the pressure, added to the large cross-sectional area, results in high pull-out forces. In addition, pull-out forces can also be caused by movements of the soil.

To adapt the pipe connection device to different outer diameters of the pipes, it is known to use so-called clamping rings. These are made up of a large number of links that can be moved relative to one another in order to be able to adjust the inner diameter. In practice, however, the use of a clamping ring of this type leads to a conflict of objectives, since the sealing and also adequate tension protection of a clamping ring are made more difficult.

The object of the invention is now to create a pipe connection device that has an adjustable inner diameter and still allows a permanently tight and pull-out connection.

The object is achieved in particular by the features of the independent patent claim.

In particular, the invention relates to a pipe connection device for forming a sealing and pull-out-proof pipe connection, comprising:

- a socket for receiving a pipe end,

- a clamping body, which is in particular ring-shaped,

- at least one clamping device, in particular several screws distributed along the clamping body,

- a clamping ring composed of several links that can be moved relative to one another and have an adjustable inner diameter,

- preferably a gasket to seal the pipe joint,

- and preferably several securing wedges arranged to be displaceable via a guide device on the links along the extraction direction for securing the pipe end against extraction,

- wherein the clamping ring is designed in such a way that it is clamped between the sleeve and the clamping body and pressed in the direction of the pipe end by clamping or tightening the clamping means,

- wherein the seal with a sleeve portion extends annularly between the sleeve and the clamping ring to seal this area.

It is preferably provided that at least one safety wedge is associated with a braking element that generates an increasing counterforce against the extension of the safety wedge as the extension path of the safety wedge increases.

If necessary, it is provided that several or all safety wedges of the clamping ring is assigned a braking element.

Optionally, it is provided that the safety wedges are stored out on the guide devices, in particular linearly, on the clamping ring on the members.

According to the invention it is provided that the braking elements are designed as chocks which generate an increasing clamping force as the extension path of the safety chocks increases.

Optionally, it is provided that the guide device comprises a guide rail and a guide clamp encompassing the guide rail.

Optionally, it is provided that the braking element is positioned in the course of the guide rail and/or in the course of the guide clip.

Optionally, it is provided that the guide rail is arranged on a member of the clamping ring, that the guide clip is arranged on the associated safety wedge, and that the chock rises obliquely in the direction of the safety wedge along the extension direction of the guide rail.

Optionally, it is provided that the guide rail runs along the pull-out path obliquely to the axial direction in the direction of the pipe end or toward the middle.

If necessary, it is provided that the chock rises along the extension path obliquely from the guide rail towards the end of the pipe or towards the middle.

If necessary, it is provided that the guide clip acts as a clip and is designed in such a way that the guide clip can be clipped onto the guide rail transversely to the course of the guide rail by elastic deformation.

Optionally, it is provided that the guide device has a first section in which the guide device allows a substantially free displacement of the safety wedge relative to the link.

Optionally, it is provided that the guide device has a second section in which the braking element counteracts the extension of the safety wedge with a counterforce.

Optionally, it is provided that the safety wedge is held in its basic position by at least one holding element, the holding elements being designed such that the holding force of all holding elements of a safety wedge is smaller than the pull-out force acting on the safety wedge.

It is preferably provided that a ring-shaped seal carrier is provided between the seal and the clamping ring.

Optionally, it is provided that the seal go through at least along one

the circumferential line, in particular along an annular uninterrupted surface, rests against the seal carrier and/or the sleeve.

If necessary, it is provided that the clamping ring rests slidingly on the seal carrier when the inner diameter changes.

If necessary, it is provided that the seal carrier is coupled in the radial direction, in particular in a form-fitting manner, to the clamping body and remains stationary when the inner diameter of the clamping ring changes in relation to the clamping body.

If necessary, it is provided that the position of the socket section of the seal and the position of the clamping body relative to the clamping body remain unchanged when the inner diameter of the clamping ring changes.

If necessary, it is provided that the seal carrier and the sleeve are positively coupled to one another via a free space and an extension projecting into the free space in the axial direction.

If necessary, it is provided that the extension is provided on the seal carrier and the exemption on the sleeve.

Optionally, it is provided that the extension is designed to be annular and that the exemption is an annular groove.

Optionally, it is provided that the seal runs between the extension and the exemption.

If necessary, it is provided that the seal extends into the area between the extension and the cut-out.

If necessary, it is provided that the seal completely fills the area between the extension and the cut-out.

Optionally, it is provided that the seal is arranged with a pipe section on the inside of the clamping ring in order to seal the gap between the clamping ring and the pipe when the end of the pipe is inserted.

Optionally, it is provided that the tube section of the seal is designed in such a way that it bears against the tube end at least along a continuous circumferential line, in particular along an annular uninterrupted surface.

Optionally, it is provided that the seal comprises a connecting section via which the sleeve section and the pipe section of the seal are connected to one another in a sealing manner.

Optionally, it is provided that the connection section, the socket section and the pipe section of the seal are designed in one piece.

Optionally, it is provided that the connecting section of the seal is designed in such a way that it allows a movement of the pipe section in the axial direction, in particular in the direction of extension of the pipe, relative to the socket section while maintaining the sealing effect.

Optionally, it is provided that the connecting section is designed as an annular fold section.

If necessary, it is provided that the seal carrier is designed in several parts and comprises several segments which, when put together, form a smooth, essentially continuous side pointing in the direction of the socket section of the seal.

Optionally, it is provided that the clamping ring comprises a plurality of locking wedges arranged displaceably on the members along the pull-out direction to secure the pipe end against being pulled out.

In particular, it is provided that the safety wedges along the pull-out direction

are movably arranged obliquely to the surface of the pipe end or obliquely to the axial direction of the pipe end.

It is preferably provided that the seal carrier is ring-shaped and preferably in the form of a hollow truncated cone, so that the seal carrier has two conical or conical surfaces, one of which is designed to rest on the seal and the other to rest on the clamping ring.

It is preferably provided that the clamping body is ring-shaped and has a conical or conical surface which faces the clamping ring in the mounted position.

It is preferably provided that the seal extends annularly with a sleeve section between the sleeve and the clamping ring in order to seal off this area.

If necessary, it is provided that the seal carrier completely covers a conical surface of the clamping ring. If necessary, it is provided that the seal, in particular the socket section of the seal, completely covers one side of the seal carrier. Provision is preferably made for the seal to follow the course of the seal carrier. In particular, it is provided that the seal follows the course of the seal carrier and in doing so extends around the extension of the seal carrier and then continues to follow the course of the seal carrier. Provision is preferably made for the seal to extend into the clearance, in particular into the annular groove of the sleeve.

It is preferably provided that the seal is arranged between the sleeve and the seal carrier, the seal carrier not touching the sleeve at any point, but that the seal always runs between the two components.

The braking elements are preferably designed in such a way that they generate an increasing counterforce against the extension as the extension path of the safety wedges progresses. In particular, this means that the force required to move the safety wedge increases as the extension path progresses. This is regardless of the fact that the safety wedge is pressed more and more strongly against the end of the pipe as the extension path progresses. The braking element acts, for example, as a friction element, in which the friction between the safety wedge and the link increases the further the safety wedge is pulled out. If necessary, the braking element is elastically and/or plastically deformed as the extension path progresses.

In particular, the braking elements are designed as safety wedges, which generate an increasing clamping force between the link and safety wedge as the extension path progresses. The locking wedge is connected to the member of the clamping ring via a guide device. The guide device preferably comprises a guide rail and a guide clamp encompassing the guide rail. In the course of the guide rail and/or the guide clip, a brake wedge is provided, which rises in such a way that an increasing counterforce is generated as the extension path progresses. In particular, the safety wedge rises obliquely from the guide rail. The safety wedge is preferably arranged in such a way that the play of the guide device is reduced or a tighter press fit is produced as the extension path continues. The chock preferably rises obliquely from the guide rail in the pull-out direction.

The braking element is preferably designed in such a way that the counterforce increases linearly or progressively as the extension path progresses.

The safety wedge is preferably fixed without abutment, in particular without a stop on one side, on the members of the clamping ring, so that the safety wedges can be removed if necessary after the counterforce has been overcome.

To produce a pipe connection using the pipe connection device according to the invention, the procedure can be as follows: The pipe connection device is preferably preassembled, with the clamping ring between the clamping body and

the sleeve is arranged. A seal carrier is provided between the sleeve and the clamping ring. A seal is provided between the seal carrier and the sleeve. In addition, the seal runs on the inside of the clamping ring. The clamping ring or the clamping means are opened so far that the inside diameter of the clamping ring is larger than the outside diameter of the pipe end. This allows the pipe end to be inserted into the socket and into the ferrule. If the pipe end is in the desired position within the socket, the clamping means can be clamped and tightened. By tightening the clamping device, the clamping body is pulled against the socket and the clamping ring is pressed towards the end of the pipe. In particular, the clamping means are tightened until the clamping ring is pressed against the pipe end with sufficient force. In this position, the clamping ring preferably lies against the end of the pipe with its safety wedges. In addition, the seal is clamped ring-shaped between the clamping ring and the pipe end in order to seal this area. In addition, the seal preferably also extends between the sleeve and the clamping ring, in particular between the sleeve and the seal carrier, in order to also seal this area.

During assembly, the safety wedges are preferably arranged in their basic position and are thereby positioned as far as possible inside the links. In this position, the safety wedges are preferably held by holding elements.

[0052] In particular, in the case of a pipe connection produced in this way, the pull-out protection takes place as follows:

If the pipe end is pulled out of the socket by pull-out forces, the safety wedges 8 are moved along with the pipe end along the pull-out direction. As the extension path of the safety wedges progresses, the safety wedges are pressed against the end of the pipe due to their wedge-shaped design and the wedge-shaped bearing. Preferably, the safety wedges comprise prongs or teeth on their side facing the pipe end, which may be pressed into the surface of the pipe end in order to improve the connection. As the extension path progresses, the safety wedges are moved from a first section to a second section. Braking elements are provided in the second section, which generate an increasing counterforce against the extension of the securing wedges as the extension distance of the securing wedges progresses. In a preferred embodiment, the braking elements are designed as braking wedges, which generate an increasing clamping force as the extension path of the securing wedges progresses. The wedges preferably rise along the direction of movement of the safety wedges in a region of the guide device, which increases the friction as the extension path progresses. This can prevent the locking wedges from being pulled too far out of the ferrule links without requiring a hard stop.

[0053] The invention is further described below with reference to figures.

FIG. 1 shows a schematic oblique view of a possible embodiment of a pipe connection device.

FIG. 2 shows a sectional representation of a pipe connection device, in particular the pipe connection device from FIG. 1, in its installed position.

FIG. 3 shows a schematic sectional view of a detail in the area of the clamping ring.

Figures 4a and 4b show two views of a possible embodiment of a safety wedge.

FIG. 5 shows a side view of a member of a clamping ring with the safety key removed.

FIG. 6 shows a view of two members of a clamping ring which have been plugged together.

Unless otherwise stated, the reference symbols correspond to the following components

ten: socket 1, pipe end 2, clamping body 3, clamping device 4, link 5, clamping ring 6, seal 7, safety wedge 8, socket section (of the seal) 9, seal carrier 10, radial direction 11, clearance (for coupling the seal carrier) 12, axial direction 13 , Extension (for coupling the seal carrier) 14, pipe section (of the seal) 15, connecting section (for connecting the seal sections) 16, guide device 17, brake element 18, brake wedge 19, guide rail 20, guide bracket 21, first section (of the guide device) 22, second Section (of the guiding device) 23, retaining element (for the safety wedge in the basic position) 24, undercut 25 (of the guiding device) slot 26, ring connecting element 27.

FIG. 1 shows a pipe connection device with a socket 1 which is designed to receive a pipe end 2 (not shown) and in particular to establish a connection with the pipe end 2. In the present embodiment, the pipe connection device is set up for coupling two pipe ends 2 . In principle, the pipe connection device can be configured in all embodiments in such a way that a pipe end 2 can be attached to one side of the pipe connection device. On the other hand, any components such as a flange, a riser pipe, a pipe branch 0or, as in the present case, a second socket 1 for connection to a pipe end 2 can be provided.

The pipe connection device comprises a clamping body 3, which, as in the present embodiment, is preferably ring-shaped. A clamping ring 6 is provided between the sleeve 1 , in particular an annular section of the sleeve 1 , and the clamping body 3 . The clamping ring 6 is composed of several members 5 and has an adjustable inner diameter. The clamping ring 6 can be adjusted by tightening the clamping means 4. In the present embodiment, the clamping means 4 are in the form of screws, through which the clamping body 3 can be pulled in the direction of the sleeve 1 . In all of the embodiments, both the sleeve 1 and the clamping body 3 preferably have an inclined and/or conical surface which points in the direction of the clamping ring 6 and in the direction of the pipe end 2 . The clamping ring 6 also has conical or inclined outer surfaces on its surfaces facing the sleeve 1 and the clamping body 3, the width of the clamping ring 6 or its members 5, measured along the axial direction 13, decreasing outwards.

To produce a sealed connection, the pipe connection device comprises a seal 7. To improve the security against being pulled out, the pipe connection device preferably comprises several safety wedges 8.

FIG. 2 shows a sectional view, in particular a sectional view, of the pipe connecting device from FIG. 1 in an assembled position, in which two pipe ends 2 are connected to one another via the connecting device. As described, this is one possible embodiment, while other possible embodiments may only include a clamping ring 6 for connection to a pipe end 2 .

The pipe connection device comprises a socket 1, a clamping body 3 and a clamping ring 6 clamped between the socket 1 and the clamping body 3. The clamping ring 6 or its members 5 are preferably designed in such a way that by tightening at least one clamping means 4 the clamping body 3 can be moved in the direction of the socket 1 is clamped, and the clamping ring 6 is thereby pressed in the radial direction 11 towards the pipe end 2 . This happens in particular over at least one conical surface. In the present embodiment, both the sleeve 1 and the clamping body 3 each have an inclined or conical surface, which is directed towards the clamping ring 6 and the pipe end 2 . The pipe connection device comprises a seal 7 for sealing. To improve the security against being pulled out, the pipe connection device in turn preferably comprises several safety wedges 8.

FIG. 3 shows a detail of a sectional view of a pipe connection device, in particular the pipe connection device from FIG. 2 and/or FIG. 1.

The pipe connection device comprises a socket 1, a clamping body 3 and a clamping ring 6 arranged between the clamping body 3 and the socket 1. The clamping ring 6 is made up of several

assembled relative to each other movable members 5 and thus has a variable or an adjustable inner diameter. The clamping body 3 can be clamped in the direction of the socket 1 via at least one clamping device 4 . As a result, the clamping ring 6 is pressed in the direction of the pipe end 2. In the present embodiment, both the socket 1 and the clamping body 3 comprise a sloping surface inclined towards the end of the pipe 2, which is preferably designed in each case at a sloping or conical shape. The clamping ring 6 preferably also has sloping or conical surfaces, each of which preferably runs essentially parallel to the sloping surfaces of the sleeve 1 and the clamping body 3 . In particular, the clamping ring 6 is designed in such a way that its extent, measured in the axial direction 13 , decreases towards the outside and is therefore designed to converge towards the outside in the radial direction 11 .

A seal 7 is provided to produce a seal. The seal 7 is designed to prevent the medium in the pipe from escaping.

In the present configuration of the tube connecting device, in particular the gap between the clamping ring 6 and the tube end 2 must be sealed. For this purpose, the seal 7 comprises a pipe section 15 which runs between the clamping ring 6 and the pipe end 2 and is clamped in when the pipe connection is made. If no pipe end 2 is inserted into the pipe connection device, the pipe section 15 of the seal 7 preferably runs in a ring shape along the inside of the clamping ring 6. If the clamping ring 6 is pressed in the direction of the pipe end 2, the seal 7, in particular its pipe section 15, is also between the clamping ring 6 and the pipe end 2 clamped, whereby a seal is effected. In this position, the seal preferably rests with its pipe section 15 along a closed, circular contour on the pipe end 2 .

To seal off the area between the sleeve 1 and the clamping ring 6 , the seal 7 has a sleeve section 9 which runs between the sleeve 1 and the clamping ring 6 . The sleeve section 9 of the seal 7 is preferably clamped between the clamping ring 6 and the sleeve 1 in the assembled position. To improve the sealing effect, a seal carrier 10 is provided between the seal 7 , in particular between the sleeve section 9 of the seal 7 , and the clamping ring 6 .

The seal carrier 10 is ring-shaped in the present embodiment. Optionally, the seal carrier 10 is a one-piece ring. If necessary, the seal carrier 10 is a ring composed of several segments. In all of the embodiments, the seal carrier 10 preferably has an essentially smooth outer surface pointing in the direction of the seal 7 , which in the case of an assembled seal carrier 10 has joints. The joints are preferably designed to be as smooth as possible and to overlap. This smooth configuration of an annular surface allows a substantially closed, in particular smooth contact surface to be formed for the seal 7 or its socket section 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 in the direction of the pipe end 2 , the seal carrier 10 does not change its position in the radial direction 11 with respect to the sleeve 1 . The seal carrier 10 thus remains unmoved when the clamping ring 6 moves in relation to the sleeve 1 . As a result, the sealing effect can be maintained even if the clamping ring 6 or its members 5 move during tensioning or tightening. In particular, due to the coupling of the seal carrier 10 to the sleeve 1, when the clamping ring 6 moves, the seal 7 also remains stationary relative to the sleeve 1. As a result, a substantially fixed connection of the seal 7 clamped between the sleeve 1 and the seal carrier 10 can be formed when the clamping ring 6 is moved.

In the present embodiment, an extension 14 and a clearance 12 are provided for coupling the seal carrier 10 to the sleeve 1 . The extension 14 engages in the clearance 12 in order to be able to produce a form-fitting coupling in the axial direction 13 . In principle, any conventional device for coupling the seal carrier 10 to the sleeve 1 can be used. In the present embodiment, the seal carrier comprises

eng 10 an extension 14 which protrudes into an exemption 12 of the sleeve 1. In particular, the exemption 12 is designed as an annular groove and the extension 14 as an annular extension which engages in the annular groove.

In the present embodiment, the seal 7, in particular its sleeve section 9, also extends into the area between the extension 14 and the clearance 12. Especially when the clearance 12 and the extension 14 are formed in an annular shape, the seal 7 is squeezed annularly in this area , so that the sealing effect can be improved.

The seal 7 preferably extends with its sleeve section 9 over the entire outer surface of the seal carrier 10 pointing in the direction of the sleeve 1. However, it also corresponds to the idea of the invention that the sleeve section 9 of the seal 7 only runs along an annular section of the seal carrier 10.

To improve the sealing effect of the seal 7, the socket section 9 and the tube section 15 of the seal 7 are connected to one another in a sealing manner. A connecting section 16 of the seal 7 is provided for this purpose. The connecting section 16 connects the pipe section 15 and the sleeve section 9 of the seal 7 in such a way that no medium can escape in this area.

When the inner diameter of the clamping ring 6 is adjusted, there is usually also a displacement of the pipe section 15 of the seal 7. In order to be able to maintain the sealing effect, the connecting section 16 of the seal 7 is designed in such a way that it allows a relative movement of the Allows pipe section 15 relative to the socket section 9 while maintaining the sealing effect. In the present embodiment, the connecting portion 16 is formed as an annular fold. The fold serves as a kind of material reservoir to compensate for the relative movement of the pipe section 15 in relation to the socket section 9. In particular, two essentially parallel ring-shaped sections of the seal 7 are connected to one another in the outer area in a sealing manner and at their other ends to the socket section 9 or to the Pipe section 15 connected. As a result, the connecting section 16 is flexible. Alternatively, an elastically deformable or expandable connecting section 16 can also be provided for smaller relative movements.

To improve the security against being pulled out, the pipe connection device preferably comprises a plurality of safety wedges 8. These safety wedges 8 are attached to the members 5 of the clamping ring 6. If there is a pull-out force of the pipe end 2 or a pull-out movement, which takes place from left to right in the present illustration, the securing wedges 8 help to improve the pull-out safety.

In all of the embodiments, it is preferably provided that the clamping ring 6 is supported on the pipe end 2 via the securing wedges 8 . In all of the embodiments, the clamping ring 6 is preferably in contact with the pipe end 2 exclusively with its securing wedges 8 . In addition, the seal 7 also rests against the pipe end 2 in order to create a seal.

In all of the embodiments, the securing wedges 8 preferably have teeth which improve the connection between the securing wedge 8 and the pipe end 2 .

The securing wedges 8 are displaceably attached to the members 5 of the clamping ring 6 in the pull-out direction, in particular in the axial direction 13 . The securing wedges 8 are also considered to be movable in the axial direction 13 when they are moved at an angle to the axial direction 13 , since they still have at least one component of their movement in the axial direction 13 .

In order to avoid shifting of the securing wedges 8 from their basic position prior to connection to the pipe end 2, the securing wedges 8 are held in their basic position, as can be seen in the illustration in FIG. In particular, holding elements 24 are provided which hold the safety wedges 8 in their basic position on the links 5 . However, these retaining elements 24 are designed in such a way that they allow the securing wedges 8 to move relative to the links 5 when a certain retaining force is overcome. This holding force is so small that the effect of the safety wedges 8 is not impaired.

In principle, the securing wedges 8 are guided and mounted on the members 5, with which they can be pulled off the clamping ring 6 if necessary. In the present embodiment, braking elements 18 are provided, which generate an increasing counterforce against the extension as the extension path of the securing wedges 8 progresses. If the pipe end 2 is moved by an extraction force, the safety wedges 8 follow the movement of the pipe end 2. Due to the wedge-shaped design, however, they are pressed in the direction of the pipe end 2 and thus increase the holding force against the pipe end 2. In order to prevent the safety wedges 8 are deducted from the links 5 if the relative movement is too great, braking elements 18 are provided. In particular in combination with a large number of safety wedges 8 braked by braking elements 18, it is possible to prevent the safety wedges 8 from being pulled off the links 5 without, however, requiring a positive, hard stop, which represents a weak point with high pull-out forces. Rather, the safety wedges 8 are braked with a constantly or progressively increasing braking force.

Basically, there are different ways to implement a braking element 18 that acts in this way. In the present embodiment, the braking elements 18 are designed as brake wedges 19 . The braking wedges 19 increase the frictional force between the members 5 and the securing wedges 8 as the extension progresses, which also increases the counterforce against the extension.

Alternatively, the braking elements 18 can be elements that deform elastically or plastically when the securing wedges 8 are pulled out.

A guide device 17 is provided for connecting and/or guiding a safety wedge 8 to a link 5 . The guide device 17 is preferably set up to produce a guided mounting of the safety wedge 8 on a link 5 along a degree of freedom. The guide device 17 preferably comprises a guide rail 20 and a guide clamp 21. The guide clamp 21 encompasses the guide rail 20 in order to enable essentially linear guidance or guidance along a degree of freedom. In the present embodiment, the guide rail 20 is arranged on the link 5 and the guide clip 21 on the safety wedge 8. In principle, however, a kinematic reversal would also be conceivable.

In the present embodiment, the brake wedges 19 are arranged in such a way that, in addition to increasing the frictional forces, the gradient of the guide rail 20 is also increased.

Figures 4a and 4b show two views of a safety wedge 8, in particular the safety wedge 8 from Figures 1, 2 and / or 3. The safety wedge 8 includes in this embodiment, the guide clip 21, which is set up or suitable to embrace guide rail 20, not shown, of member 5 and thereby bring about displaceability or guidance. In particular, it is provided that the guide clip 21 has run-in bevels or is designed to be elastic in such a way that the guide clip 21 and/or the safety wedge 8 can be clipped onto the guide rail 20 .

Optionally, the guide clip 21 can comprise at least one slot 26 or, as in the present embodiment, two slots 26, so that the rigidity is reduced and clipping is facilitated.

In particular, the guide clip 21 has at least one undercut 25 in which the guide rail 20 is guided, so that a simple removal of the securing wedges 8 in the radial direction 11 is prevented. However, the present configuration can enable the plugging on by overcoming a force when clipping it on in the radial direction 11 .

5 shows a schematic view of a member 5 of a clamping ring 6, but without a safety wedge 8. If necessary, the member 5 according to FIG. 5 can be used in the pipe connection devices according to FIGS. The link 5 comprises a guide rail 20. This guide rail 20 is adapted to fit into the guide bracket

21 engage and in particular engage with lateral elements in the undercut 25 of the guide bracket 21. The guide device comprises a braking element 18 which is designed in particular as a braking wedge 19 in this embodiment. The safety wedge 8 (not shown) is in its basic position in a first section 22. In this first section 22, the safety wedge 8 can move essentially freely along the guide rail 20 without the braking element 18 exerting a counterforce on the safety wedge 8. In contrast, the braking element 18 is arranged in a second section 23 . If the securing wedge 8 moves from its basic position into the second section 23, the braking element 18 generates a counterforce against the extension movement, which in the present illustration runs from right to left.

In all of the embodiments, the direction of movement of the securing wedges 8, in particular the degree of freedom of the guide device 17 and/or the guide rail 20, preferably runs along the pull-out direction at an angle in the direction of the pipe end 2.

FIG. 6 shows a schematic view of two assembled links 5, which can be links 5 of FIGS. 1, 2, 3 and/or 5 in particular. FIG. 6 shows two members 5 which are fitted together and which form a section of a clamping ring 6 . Ring connecting elements 27 are provided for connecting the links 5 to one another. These allow the members 5 to move relative to one another in order to be able to form a clamping ring 6 with a variable or adjustable inner diameter.

In particular, the links 5 have a certain mobility relative to one another in the circumferential direction due to the ring connecting elements 27 . In the present embodiment, extensions and openings are provided, for example, which form ring connecting elements 27 and allow mobility of the members 5 relative to one another in the circumferential direction. In the axial direction 13 and in the radial direction 11, on the other hand, the large number of ring connecting elements 27 results in a form-fit connection 0of the coupling, possibly with play. In particular, ring connecting elements 27 can also be clip-shaped, for example in the outer area of the clamping ring 6, so that the clamping ring 6 comprises links 5 lined up in a chain, which, however, cannot be separated from one another automatically.

Claims (9)

patent claims 1. Pipe connection device for forming a sealing and pull-out-proof pipe connection, comprising: - a sleeve (1) for receiving a pipe end (2), - a clamping body (3), which is in particular ring-shaped, - At least one clamping device (4), in particular several screws distributed along the clamping body (3), - a clamping ring (6) composed of several links (5) arranged to be movable relative to one another and having an adjustable inner diameter, - a gasket (7) for sealing the pipe connection, - and several securing wedges (8) arranged to be displaceable on the members (5) along the extraction direction via a guide device (17) for securing the pipe end (2) against extraction, - the clamping ring (6) being designed in such a way that it is clamped between the sleeve (1) and the clamping body (3) and pressed in the direction of the pipe end (2) by clamping or tightening the clamping means (4), characterized, - that at least one safety wedge (8) is assigned a braking element (18) which generates a counterforce against the extension of the safety wedge (8) which increases as the extension path of the safety wedge (8) progresses, and - that the braking elements (18) are designed as braking wedges which generate an increasing clamping force as the extension path of the securing wedges (8) progresses. 2. Pipe connection device according to claim 1, characterized in that several or all safety wedges (8) of the clamping ring (6) are each assigned a braking element (18). 3. Pipe connection device according to claim 1 or 2, characterized in that - the safety wedges (8) are mounted on the guide devices (17), in particular linearly, guided on the members (5). 4. Pipe connection device according to one of Claims 1 to 3, characterized in that - the guide device (17) comprises a guide rail (20) and a guide clamp (21) encompassing the guide rail (20), - and that the braking element (18) over the course of the guide rail (20) and/or in the course of the guide bracket (21). 5. Pipe connection device according to claim 4, characterized in that - that the guide rail (20) is arranged on a member of the clamping ring (6), - that the guide clip (21) is arranged on the associated safety wedge (8), - and that the brake wedge (19) along the pull-out direction from the guide rail (20) at an angle towards the safety wedge (8). 6. Pipe connection device according to claim 4 or 5, characterized in that - that the guide rail (20) runs along the pull-out path at an angle to the axial direction (13) in the direction of the pipe end (2) or in the direction of the center, - and that the brake wedge (19) runs along it of the extension path rises obliquely from the guide rail (20) towards the end of the tube (2) or towards the middle. 7. Pipe connection device according to one of claims 4 to 6, characterized in - that the guide clip (21) acts as a clip and is designed such that the guide clip (21) by elastic deformation, transverse to the course of the guide rail (20) can be clipped onto the guide rail (20). 8. Pipe connection device according to one of claims 1 to 7, characterized in that - That the guide device (17) has a first section (22) in which the guide locking device (17) allows a substantially free displacement of the safety wedge (8) relative to the member (5), - And that the guide device (17) has a second section (23) in which the braking element (18) counteracts the extension of the safety wedge (8) with a counterforce. 9. Pipe connection device according to one of Claims 1 to 8, characterized in that - the safety wedge (8) is held in its basic position by at least one holding element (24), - the holding elements (24) being designed in such a way that the holding force of all holding elements (24) of a safety wedge (8) is smaller than the pull-out force acting on the safety wedge (8). 4 sheets of drawings