EP3781854A1

EP3781854A1 - Sealing system

Info

Publication number: EP3781854A1
Application number: EP19712562.8A
Authority: EP
Inventors: Maximilian Hoffmann; Belal AKREMI
Original assignee: ElringKlinger AG
Current assignee: ElringKlinger AG
Priority date: 2018-04-20
Filing date: 2019-03-19
Publication date: 2021-02-24
Also published as: WO2019201531A1; DE102018109608A1

Abstract

In order to improve a sealing system for a pipe connection, more particularly for hot gas applications, it is proposed that the sealing system comprises: - a sealing element; - a clamp device, which has a closing system; and - a carrier unit, the carrier unit bearing the sealing element and being connected to the clamp device.

Description

SEALING SYSTEM

The invention relates to a sealing system for a pipe connection, in particular for hot gas applications.

Such sealing systems are preferably used in the exhaust gas line and in the exhaust gas recirculation in internal combustion engines, in particular in motor vehicles.

Here are the sealing system high demands on the

Reliability of the seal, especially against exhaust gases, provided.

In addition, such sealing systems must be stable to high temperatures, in particular be stable at temperatures up to 800 ° C and reliably seal at these temperatures.

The object of the invention is to improve generic sealing systems, in particular to provide them in a manner which is easy to assemble and to form such that incorrect positions of the elements of the sealing system during assembly are avoided.

This object is achieved in that a sealing system of the type mentioned above comprises a sealing element, a clamp device with a locking system and a carrier unit, wherein the carrier unit holds the sealing element and the carrier unit with the

Clamping device is connected. One of the advantages of the invention lies in the fact that the sealing ring is carried by the carrier unit and connected by means of this with the clamp device. As a result, preferably a fitter can take these elements of the sealing system substantially as a unit with one hand and assemble and has his second hand free to position, for example, a pipe end of the pipe joint.

In addition, preferably already the clamp device and the sealing ring are aligned substantially in the right relative to the mounting position relative to each other, so that during assembly of the sealing system of the step of aligning these elements to each other deleted and by positioning the sealing ring and the clamp device substantially already is positioned at its intended for mounting position.

In addition, preferably, the carrier unit with the sealing ring increases the

Stability of the sealing system and in particular a rotation of the elements of the clamp device is prevented relative to each other, as the

Clamping device is connected to the carrier unit and thus the individual elements at least difficult to twist to each other.

The lent by the carrier unit stability and reduction of

Twisting of the clamp device also facilitates closing the

Clamping device with its locking system.

Furthermore, these elements of the sealing system are already preassembled and substantially in the correct relative position to each other, so that incorrect positioning in the assembly of these elements are avoided in the pipe joint, so that a simpler and more reliable installation of the sealing system is possible.

With regard to the connection between the carrier unit and the clamp device, no further details have been given so far. For example, the carrier unit is held by the clamp device. This has the advantage that the carrier unit is already held in a predetermined position favorable for the mounting position relative to the clamp device and so during assembly, the alignment of the two elements is relatively easier or this step completely eliminated.

In a particularly advantageous embodiment it is provided that the carrier unit is connected under pretension with the clamp device, in particular held by this.

This preferably makes possible on the one hand a simple connection between the carrier unit and the clamp device which, on the other hand, also stably connects the two to one another. In particular, in a transport of the sealing system or the recording of the sealing system by a fitter of the pending clamp device with the carrier unit and the assembly thereof, these are firmly connected to each other even with vibration or shaking the sealing system.

For the connection of the carrier unit with the clamp device, the carrier unit preferably comprises at least one clamping element. It is particularly preferred if the carrier unit comprises a plurality of clamping elements.

With the clamping elements a simple connection of the carrier unit is made possible with the clamp device, in particular this allows a simple clamping of the carrier unit in the clamp device.

In the case of particularly advantageous embodiments, the one or more clamping elements, in particular several or all of the several clamping elements, have one or more of the following features. In some embodiments, it is provided that the plurality of clamping elements are designed differently to different

Requirements, for example, at different points of the sealing system, or to fulfill different functions within the

Sealing system to meet.

In other preferred embodiments, all clamping elements are formed substantially the same. This provides a flexible use of the carrier unit and allows a particularly simple construction and

Production of the same.

It is preferably provided that the plurality of clamping elements have a respectively adapted bias. In particular, the clamping elements have such a bias that the sealing ring and the clamp device are substantially concentric with each other, in a particularly preferred manner at different degrees of opening of the clamp device are each substantially concentric with each other.

Thus, the sealing ring is arranged relative to the clamp device substantially in a predefined position preferably by different bias voltages in the clamping elements.

In some embodiments, different clamping elements are provided for the different bias and in other embodiments, the substantially identically formed clamping elements are mounted under a different bias.

In particular, it is provided that at least one clamping element of

Carrier unit on the clamp device, in particular on a

Recording of the same, supports. Thus, in a particularly simple manner, the carrier unit is connected to the clamp device by means of the at least one, preferably the plurality of clamping elements. In a particularly advantageous embodiment, it is provided that the carrier unit comprises a plurality of clamping elements, which clamp the carrier unit in the clamp device.

The plurality of clamping elements are preferably supported on the clamp device, in particular on the receptacle thereof.

For example, the carrier unit is held by the clamping elements resiliently in the clamp device.

In particular, the receptacle is formed substantially groove-like.

By way of example, the receptacle has an opening pointing radially inwards towards a sealing axis, which extends completely around the sealing axis, in particular in a circumferential direction. In this case, the receiving opening is aligned in particular in the direction of the carrier unit.

From the receiving opening, the receptacle typically extends to a receiving base, for example, the receptacle extends in the radial direction to the sealing axis.

The sealing axis typically falls in the assembled state

Essentially with a pipe connection axis together. Therefore, in principle, a reference to the sealing axis should also be understood as a reference to the pipe connection axis and vice versa.

In particular, the clamp device extends substantially around the

Sealing axle around.

The pipe connection, in particular two pipe end pieces thereof, extends substantially in the axial direction to the pipe connection axis. In particular, two wall pieces of the pipe end pieces enclose substantially around the pipe connection axis in a circumferential direction

run around closed, a common interior.

In this case, the sealing system is provided to seal off the common interior space with respect to a radially outer space located in relation to the pipe connection axis.

It is preferred that the one clamping element or the plurality of clamping elements are supported on the receiving bottom of the receptacle.

With regard to the configuration of the one clamping element or the plurality of clamping elements so far no further details have been made.

For example, the clamping elements comprise screws and springs to clamp the carrier unit in the clamp device.

In particularly preferred embodiments, it is provided that the one or one of the plurality of clamping elements comprises at least one clamping arm. Preferably, several, in particular all, of the clamping elements comprise at least one clamping arm.

In particular, it is provided that these clamping elements comprise two clamping arms.

With the clamping arms, preferably, the carrier unit can be easily clamped with the clamp device.

For example, the clamping arms are slightly differently designed to achieve a respective desired bias.

In addition, the clamping arms offer a structurally simple design of the clamping elements. In particular, the clamping arms, preferably oblong, extend radially outward from the carrier unit relative to the sealing axis, preferably bent radially outwards.

Typically, the clamping arms are resilient.

With regard to the arrangement of the clamping elements so far no details have been made.

In particular, the clamping elements have an at least approximately equal radial distance to the sealing axis.

Above and below, the expression "at least approximately" means that technical and technically relevant deviations from the stated value are included.

By way of example, deviations of up to ± 20%, preferably of up to ± 10%, in particular of up to ± 5%, for example of up to ± 1%, from the stated value are included.

Preferably, the clamping elements are arranged rotationally symmetrical to the sealing axis. Preferably, this is as uniform as possible

Tensioning of the carrier unit is achieved in the clamp device, whereby the carrier unit is firmly and stably connected to the clamp device.

In particular, at least two clamping elements, in particular in each case two clamping elements, are arranged substantially opposite one another in the radial direction relative to the sealing axis.

It is particularly favorable when the clamping elements in the circumferential direction about the sealing axis to adjacent clamping elements at least

have approximately the same distance. Alternatively or additionally, it is provided in particularly advantageous embodiments that the carrier unit comprises a tab or a plurality of tabs.

It is preferably provided that the one tab or at least one of the plurality of tabs is designed such that this tab is visible in an assembled state of the sealing system in the pipe connection from outside the pipe joint. Thus, this tab is visible in the assembled state and thus serves as a viewing flap as a Verbauer- recognition that the sealing ring is mounted with the carrier unit in the pipe joint.

In particular, the carrier unit is connected by means of the one tab or by means of the plurality of tabs with the clamp device.

Preferably, the tab or tabs reduce one

Rotation of the clamp device and thus facilitates the closing of the clamp device with the locking system, because with a twisted clamp device closing is impossible or very difficult possible.

Different types of connection of the tab with the clamp device are provided in various embodiments.

For example, at least one tab is materially connected to the clamp device, for example by welding.

In some favorable embodiments it is provided that at least one tab is fastened to the clamp device with a fastening means.

In particularly preferred embodiments, it is provided that the clamp device comprises exactly one or at least one receiving opening for exactly one or at least one lug of the carrier unit. In some particularly advantageous embodiments, it is provided that the clamp device has a plurality of receiving openings for several,

in particular for each one, strap of the carrier unit comprises.

It is provided in particular that the at least one tab engages through the at least one receiving opening. Preferably, one tab in each case engages through in each case one of the in particular several receiving openings.

Thus, the clamp device and the carrier unit are connected to each other in a structurally simple manner, the connection still provides enough clearance by means of tabs between the clamp device and the carrier unit to adjust the elements to the pipe joint precisely to each other.

In addition, advantageously for the tab as an integral part of

Carrier unit no additional space in the gap between the

Connecting flanges necessary and thus the connection between the clamp device and the support unit can be made with the sealing ring, without end faces of the flanges over which the main body connection is made and which serve in particular as a support surface for the support unit to reduce. Thus, in these embodiments, since these end faces of the flanges do not need to be downsized, a connection is provided which does not interfere with the main force connection between the connecting flanges.

In addition, the connection makes it difficult by means of tabs to twist the

Clamping device in itself and a rotation of the clamp device relative to the carrier unit, so that the mounting thereof and the closing of the clamp device is facilitated.

Preferably, for this purpose, the tabs are formed substantially band-like. A particularly simple connection by means of the tab is achieved when the tab engages substantially loosely through the receiving opening.

By contrast, in some particularly preferred embodiments

provided that at least one tab, in particular a plurality of tabs, engages / reach through at least one, in particular by a respective, receiving opening under tension.

This is also structurally easily possible and increases the positional stability of the carrier unit, which is connected by such a tension-engaging tab with the clamp device.

For example, it is provided that the one tab or the plurality of tabs is clamped in one or in the respective receiving opening / are.

In a structurally simple and advantageous embodiment, it is provided that the tab engaging under tension engages with a middle section and an end section through the receiving opening and the middle section and the end section are under tension relative to one another. In particular, the two sections are under tension to each other so that they are pushed away from each other and are pressed against the edges of the receiving opening, whereby the tab engages under tension through the receiving opening.

Typically, the tab is bent between the end portion and the middle portion, and at the bent location, the tension that forces apart the end portion and the center portion is created.

With regard to the arrangement of the one or more tabs, no details have been given so far. In the case of a plurality of tabs, it is preferably provided that at least two tabs are arranged substantially opposite one another in the radial direction relative to the sealing axis. In this case, the carrier unit is in a particularly favorable manner stable and vibration compensating connected with the clamp device.

It is particularly favorable if at least two tabs are connected to the clamp device at substantially opposite points relative to the sealing axis in the radial direction, whereby preferably a particularly stable connection is achieved.

In particularly advantageous embodiments, it is provided that

at least one, in particular exactly one, tab is connected to a closing element of the locking system of the clamping device. It is particularly favorable that the carrier unit is held by the tab connected to the closing element in the region of the closing element, since it is working and thus shaken in the area of the closing system when closing the clamp device and the tab connected counteracts this shaking and so the positionally true Closing the

Sealing system facilitates.

For example, the tab has an opening through which the

Closing element passes through.

In contrast, it is provided in a particularly favorable embodiment that the tab surrounds the clamping element. This provides a structurally simple connection of the tab with the closing element.

In some embodiments, the locking system includes exactly one

Closing element.

In other embodiments, however, it is provided that the

Locking system includes several closing elements. For example, a closing element is a clamping bolt.

In some embodiments, a lever arm is provided as the closing element.

In particularly preferred embodiments, a screw,

in particular a clamping screw, provided as a closing element.

In particularly preferred embodiments it is provided that the clamp device comprises a clamp lock.

In particular, the clamp lock connects two clamp jaws of the clamp device with each other. For this purpose, it is provided in a favorable manner that the clamp lock comprises a bridge element which is attached to the two clamp jaws and thus connects these two together.

Preferably, the two jaws are connected to each other with a gap between them.

In particularly preferred embodiments, it is provided that the one receiving opening or at least one of the plurality of receiving openings is arranged on the clamp lock.

In particular, the bridge element of the clamp lock the

corresponding receiving opening.

Alternatively or additionally, it is provided in particularly preferred embodiments that at least one tab at least partially on the

Clamp lock is trapped. In particular, it is provided in some embodiments that at least one tab between the bridge elements and at least one of

Clamp jaws is arranged, preferably that the at least one tab is at least partially disposed between the bridge element and both of the clamp jaws.

This provides in particular a particularly stable connection of the tab with the clamp device.

It is particularly advantageous if the at least one tab is at least partially clamped between the bridge element and at least one clamp jaw, preferably between the bridge element and the two clamp jaws, at least partially.

In particular, it is provided that the tab has a wing or two wings, which between the bridge element and the one

Clamp jaw or the two clamp jaws is arranged / are, preferably clamped is / are.

As a result, a structurally simple connection of this stable type is preferably provided.

In addition, the anti-rotation protection is increased by the entrapment of the tab.

With regard to the further embodiment of the carrier unit so far no further details have been made.

In particular, the carrier unit comprises a carrier section.

It is particularly advantageous if the support section engages around the sealing element. Preferably, it is provided that the support portion is arranged relative to the sealing axis radially outside the sealing element and in particular surrounds the sealing element radially outside. Preferably, the support portion is arranged adjacent to the sealing element.

This offers in particular a particularly stable hold for the sealing element.

In particularly preferred embodiments, it is provided that the carrier section is designed as a carrier ring. In this case, provision is made in particular for the carrier ring to be arranged radially outside the sealing element with respect to the sealing axis and in particular to be arranged adjacent to the sealing element.

Thus, a particularly good hold for the sealing element is preferably achieved on the one hand, and on the other hand, the support ring offers a particularly favorable twist protection for the sealing system as a whole and for the clamp device in particular.

In particular, it is provided that the carrier ring runs closed around the sealing axis in the circumferential direction.

It is particularly preferred in this case if the carrier ring is substantially congruent to the end surfaces of the connecting flanges, via which in particular the main force connection takes place in the pipe connection,

is trained.

Thus, preferably, in the mounted state, the carrier ring can be arranged between the connecting flanges and the force main connection can be made via the carrier ring. Thus, on the one hand no additional space for the support ring is required and also the end surfaces of the

Connecting flanges over which the main power connection is not reduced by the installation of the carrier ring. Thus, the installation of the carrier ring without affecting the power main circuit is possible. In particularly preferred embodiments, it is provided that the support section, in particular the support ring, and in particular also the pipe connection is designed such that the support section is acted upon essentially in the elastic region in the force main circuit. Thus, the force required for the application of the support portion is kept low and the force applied when closing the pipe joint force is used essentially for the application of the sealing element and the secure connection of the pipe end pieces.

For example, in some embodiments, the sealing element is materially connected to the support portion.

In other particularly advantageous embodiments, it is provided that the carrier section has receptacles to which the sealing element is fastened.

In some embodiments, it is provided that the sealing element is received, in particular clamped, in the receptacles.

In other preferred embodiments, the sealing element is attached to the receptacles with brackets.

In particularly favorable embodiments, it is provided that the one or more clamping elements is / are arranged on the carrier section, preferably arranged in accordance with one of the aforementioned manners.

Preferably, the support portion is formed substantially band-like. In some preferred embodiments, the carrier unit, in particular the support section, in the axial direction to the sealing axis at least approximately equal thickness as the sealing element, in particular a sealing element designed as a flat seal, in this direction.

In other particularly advantageous embodiments, it is provided that the carrier unit, in particular the carrier section, in the axial direction to the sealing axis substantially has a thickness which is smaller than a thickness measured for this axial direction of the sealing element, in particular a sealing ring.

As a result, the carrier unit, in particular the carrier section, preferably impedes loading of the sealing element, in particular of the carrier element

Sealing ring, through the pipe end pieces of the pipe joint not.

Therefore, in particular for this purpose, a thickness of the carrier unit, in particular of the support section, in the region between the pipe end pieces, in particular between the connecting flanges, relevant for the comparison of thickness and, for example, clamping elements, which are arranged in the radial direction further outward than the pipe end pieces and their thicknesses are for the thicknesses - Comparison typically irrelevant.

In particular, it is provided that the carrier unit substantially, for example, except the clamping elements and / or tabs, is designed such that it is arranged in the assembled state only in the gap between the Rohrendstücken. Thus, the carrier unit does not affect the loading of the connecting flanges by the clamp device. Preferably, it is provided that those recessed components, which are not arranged substantially between the connecting flanges, are arranged to the pipe connection axis radially outside of the connecting flanges, for example in the receptacle and / or in the receiving openings of the clamp device. For this purpose, it is provided in some particularly advantageous embodiments, that the carrier unit substantially only from the support portion, in particular the support ring, and the one clamping element or the plurality of clamping elements and / or the one tab or the plurality of tabs and a connection with the sealing element, in particular the Sealing ring, exists.

In some embodiments, it is provided that the carrier unit is assembled from several components. For example, the clamping elements and / or receptacles on the support portion, in particular cohesively, are attached.

In particularly advantageous embodiments, the carrier unit is integrally formed. As a result, the carrier unit is preferably particularly stable and free of fractures susceptible to breakage.

In addition, in particular, a one-piece carrier unit can be produced in a structurally particularly simple manner.

In particularly advantageous embodiments, it is provided that the carrier unit is formed substantially from metal. Preferably, the metal is a steel, particularly preferably a spring-loaded steel.

It is particularly advantageous if the carrier unit consists of a metal sheet

is made. This preferably has the necessary stability and has the necessary small thickness.

In particularly advantageous embodiments, it is provided that the carrier unit is punched out of the sheet and individual corresponding elements, for example, the clamping elements and / or the receptacles, respectively by forming, preferably by bending, are formed. In yet other embodiments it is provided that the carrier unit is poured.

In yet other preferred embodiments, it is provided that the carrier unit is produced in the 3D printing method.

With regard to the sealing element so far no further details have been made.

For example, the sealing element is a separate band part.

In other embodiments, the sealing element is integrally formed with the carrier unit.

In some preferred embodiments, the sealing element is a sealing ring, in particular one of the carrier unit as a separate component

trained sealing ring.

In particular, the sealing ring is a volume sealing ring.

The sealing ring preferably has a thickness of at least 1 mm, particularly preferably of at least 5 mm, in the axial direction relative to the sealing axis.

Conveniently, the sealing ring in axial direction to the sealing axis has a maximum thickness of 15 mm, in particular of at most 10 mm.

In other preferred embodiments it is provided that the sealing element is a flat gasket.

In particular, the flat gasket with the carrier unit, in particular with a support portion thereof, integrally formed. In this case, the sealing element can be made of various materials.

Preferably, the sealing element, in particular the sealing ring, in

Essentially formed of a soft material.

In particular, the sealing element, in particular the sealing ring, comprises mica.

It is particularly preferred if the sealing element, in particular the

Sealing ring, graphite covers.

Thus, the sealing element, in particular the, sealing ring preferably has particularly good sealing properties and is temperature-resistant in the required temperature range.

In particularly advantageous embodiments, it is provided that the sealing element comprises metal.

In particular, the soft material sealing ring comprises a metallic additive.

For example, the, designed in particular as a volume seal, sealing ring made of graphite and / or mica paper is formed, wherein the graphite and / or mica paper has a thickness of at least 0.1 mm and / or a thickness of at most 1 mm and / or preferably has a width of at least 5 mm and / or a maximum width of 50 mm.

In particularly favorable embodiments, the sealing element, in particular the sealing ring, comprises a metallic carrier foil. In particular, the carrier film has a thickness of at least 0.03 mm and / or a maximum thickness of 0.1 mm. In particular, it is provided that the carrier film has a width of at least 5 mm and / or a maximum width of 50 mm. Typically, in such sealing rings, the graphite and / or mica paper and the metallic carrier film are wound together and then pressed into shape.

Particularly preferably, in particular formed integrally with the support portion, designed as a flat gasket sealing element made of metal, for example from a metal sheet.

In other preferred embodiments, the sealing element comprises plastic, for example an elastomer, and is in particular substantially formed therefrom.

In some advantageous embodiments, the sealing element comprises a ceramic material, in particular it is essentially formed therefrom.

Further details on the clamp device have not yet been made.

The clamp device extends substantially in a circumferential direction around the sealing axis, in particular closed around it.

Preferably, it is provided that the two clamp jaws grip around the sealing axis in the circumferential direction.

Thus, in particular, a substantially full enclosure of the pipe connection is achieved, and preferably a substantially equal sealing pressure can be generated by the clamp device.

In particular, the clamp device has two flanks, wherein in each case one of the flanks for the admission of a respective pipe end, in particular a connecting flange of the same, is provided. Preferably, the two flanks are provided for direct loading of the respective pipe end piece.

Thus, the flanks of the clamp device are in the assembled state directly to the connecting flange of the respective pipe end. Thus, no other component is arranged between a surface of the respective flank intended for loading and a stop surface of the respective connecting flange in the assembled state, but these surfaces touch one another.

As a result, an improved loading is preferably achieved since no component disturbing the loading is arranged between the respective flank and the respective connecting flange.

The flanks, in particular their surfaces intended for acting, extend obliquely to a geometric plane extending perpendicular to the sealing axis.

In particular, in each case an angle, which is enclosed by in each case one flank, in particular its surface intended for acting, and the geometric plane extending perpendicularly to the sealing axis, is at least 10 ° in size and / or at most 60 ° in size.

In particular, the flanks extend at least approximately in the direction of rotation about the sealing axis, preferably at least

approximately closed around them.

In particular, it is provided that the two flanks are formed substantially symmetrically to a geometric symmetry plane extending at least approximately perpendicular to the sealing axis. For example, the two clamp jaws each comprise two mutually opposite flank sections, which each form a part of each flank.

The clamp device can basically be made of different materials.

In some preferred embodiments it is provided that the

Clamping device, in particular its clamp jaws, is substantially formed of metal / are.

In particularly advantageous embodiments, it is provided that the clamp device, in particular its clamp jaws, is essentially made of plastic / are.

For example, the clamp jaws are produced in a casting process.

In particularly favorable embodiments, the clamp jaws, in particular the clamp jaws made essentially of metal, are formed from one piece into their final shape.

In particularly advantageous embodiments, it is provided that the clamp device, in particular its clamp jaws, is produced in the 3D printing method.

The locking system comprises, as explained above, a closing element or a plurality of closing elements.

Preferably, each of the clamp jaws comprises at least one closing flange and at least one closing element is between the closing flanges

arranged. In particular, it is provided that the closing element is clamped between the closing flanges of the clamp device when closing the clamp device.

Typically, it is provided that the locking system closes the clamp device, in particular releasably, under tension.

In particular, the clamp device is designed such that in the closing under tension the clamp device, in particular by means of their flanks, exerts a contact pressure on the pipe end pieces of the pipe joint to be sealed.

Furthermore, the invention relates to a pipe connection of two pipe end pieces, wherein a gap between the two pipe end pieces by means of a sealing system with one or more of the above-mentioned features

is sealed.

Preferably, the pipe joint is intended for use in a motor vehicle.

In particular, the pipe connection is provided as part of a hot gas-carrying line, for example in the exhaust gas line and / or in the exhaust gas recirculation in an internal combustion engine.

The above-mentioned advantages are transferred to the pipe connection as well as to the mounting of the same.

In particular, the two pipe end pieces of the pipe connection each have a connecting flange.

Preferably, the connecting flanges each have a stop surface on a side facing away from the respective other connecting flange. The abutment surfaces of the connecting flanges are acted upon in particular by the clamp device, preferably by their flanks, in particular directly acted upon.

In this case, the stop surfaces preferably extend at least approximately complementary to the surfaces of the flanks intended for loading.

In particular, the stop surfaces are inclined to the to

Sealing axis perpendicular geometric plane. In particular, the stop surfaces with this geometric plane form an angle of at least 10 ° and / or a maximum of 60 °.

In particular, the connecting flanges each have on a side facing the respective other connecting flange on a sealing surface on which rests the sealing element. Preferably, at the respective sealing surface with the sealing element in a mounted and sealing state, a sealing line running around the sealing axis in a circumferential direction is formed.

The connecting flanges preferably each have, on the respective side facing the other connecting flange, an end face via which the force main connection of the pipe connection takes place in the mounted state.

For example, the respective end surface and sealing surface of a connecting flange are formed from a substantially same surface thereof.

It is preferred if the respective end face and sealing surface of a connecting flange are separated from one another

Connecting flange are. Typically, the end surfaces of the respective connecting flanges are formed substantially complementary to each other, so that preferably the force main circuit in a particularly favorable manner on this takes place.

It is particularly favorable if the end surfaces are in the direction of rotation

run closed around the pipe connection axis.

For a uniform application and thus uniform sealing of the pipe connection is preferably achieved.

It is particularly favorable if the end faces extend in a direction radial to the pipe connecting axis up to a radial outside of the respective connecting flange. This achieves a particularly large area and thus particularly favorable admission.

In particularly advantageous embodiments, the carrier unit, in particular the carrier section, lies between the two end faces and preferably the end faces contact the carrier unit. In particular, the main force connection via the carrier unit takes place.

Thus, in advantageous embodiments, the connection is made by the carrier unit between the sealing element, in particular the

Sealing ring, and the clamp device achieved without the carrier unit impairs the loading.

In some preferred embodiments it is provided that the

End surfaces are essentially flat surfaces.

In other advantageous embodiments, it is provided that the

End surfaces are curved. For example, a radius of curvature is at least approximately greater than 10 mm and / or less than 400 mm. In some favorable embodiments it is provided that the end surfaces extend at least approximately perpendicular to the sealing axis.

In other advantageous embodiments, it is provided that the

End surfaces run obliquely to the sealing axis. For example, the end surfaces extend at an angle of up to 45 ° to the sealing axis.

For example, the angle between the end surfaces and the sealing axis is greater than 10 degrees, and in some embodiments, the angle is at least approximately 20 degrees.

In particular, it is provided in the mounted state of the pipe joint that a free gap is arranged in the radial direction to the sealing axis between the connecting flanges and the clamp device, in particular a receiving bottom of a receptacle of the clamp device.

On the one hand, this preferably makes possible a certain amount of play for the fine adjustment of the clamp device and, on the other hand, the free gap particularly offers space for the clamping elements of the carrier unit.

In some advantageous embodiments, it is provided that at least one of the connecting flanges has a groove. The groove is there

provided in particular for receiving the sealing ring.

Preferably, a groove bottom forms the sealing surface.

The assembly is facilitated by the fact that the groove forms a receptacle for the sealing ring and this can thus be easily positioned.

In other particularly preferred embodiments it is provided that one of the two pipe end pieces, in particular at its connecting flange, has a flange. In this case, the flange, preferably a substantially planar step surface, in particular extends from a radial outer side of the flange to a flange forming the centering section.

In particular, the Rohrendstück, in particular its connecting flange, which has the flange, on the side facing the other pipe end exactly two surfaces, wherein one of them

End surface and the other comprises the sealing surface.

In such embodiments, the other pipe end piece, in particular its connecting flange, on the side which the flange stage

facing tube end piece, a receptacle for the

Centering on and is in particular also otherwise complementary to the connecting flange of the flange stage having pipe end formed.

In such embodiments, a groove is preferably provided on none of the connecting flanges. The sealing element, for example the sealing ring, is thereby positioned in particular at the flange stage.

Since in such pipe joints no groove is necessary, the production of the corresponding pipe end pieces is easier and cheaper possible. By equipped with one or more of the above features and advantages sealing system can still be done a simple installation and a reliable seal the pipe connection done.

In some advantageous embodiments, the connecting flanges to the sealing element, in particular the flat gasket, on complementarily shaped end surfaces and sealing surfaces. The above description of solutions according to the invention thus comprises in particular the various combinations of features defined by the following numbered embodiments:

A sealing system (110) for a pipe joint (100), in particular for hot gas applications, comprising a sealing element (206), a clamp device (202) with a locking system (204) and a carrier unit (208), wherein the carrier unit (208) holding the sealing element (206) and the carrier unit (208) is connected to the clamp device (202).

Second sealing system (110) according to embodiment 1, characterized in that the carrier unit (208) is connected under prestress with the clamp device (202), in particular held by the latter.

3. sealing system (110) according to one of the preceding embodiments, characterized in that the carrier unit (208) comprises at least one clamping element (322), wherein the at least one clamping element (322) is supported on the clamp device (202).

4. sealing system (110) according to one of the preceding embodiments, characterized in that the carrier unit (208) comprises a plurality of clamping elements (322), which the carrier unit (208) in the

Clamp the clamp device (202).

5. Sealing system (110) according to one of the preceding embodiments, characterized in that the one or at least one clamping element (322) at least one clamping arm (332), in particular two clamping arms (332) comprises. 6. sealing system (110) according to one of the preceding embodiments, characterized in that at least one clamping arm (332) is supported on the clamp device (202), in particular all clamping arms (332) of the support unit (208) on the clamp device (202 ).

7. sealing system (110) according to one of the preceding embodiments, characterized in that at least two clamping elements (322) are arranged in a direction of sealing axis (212) radial direction substantially opposite one another.

8. Sealing system (110) according to one of the preceding embodiments, characterized in that the carrier unit (208) comprises a tab (324) or a plurality of tabs (324) and in particular that

Carrier unit (208) by means of one tab (324) or by means of the plurality of tabs (324) is connected to the clamp device (202).

9. sealing system (110) according to the preceding embodiment, characterized in that at least one tab (324) of the support unit (208) is configured such that in an assembled state of the

Sealing system (110) this tab (324) from outside the pipe connection (100) is visible.

10. Sealing system (110) according to one of the preceding embodiments, characterized in that the clamp device (202) at least one receiving opening (342) for at least one tab (324) of the carrier unit (208) and in particular that at least one tab ( 324) passes through the receiving opening (342). 11. Sealing system (110) according to one of the preceding embodiments, characterized in that at least one tab (324) is hooked in at least one receiving opening (342), wherein in particular an end portion (354) of the tab (324) is hook-shaped, in particular is bent over.

12. Sealing system (110) according to one of the preceding embodiments, characterized in that at least one tab (324) engages through at least one receiving opening (342) under tension that in particular the one tab (324) in the receiving opening (342)

is clamped.

A sealing system (110) according to the preceding embodiment, characterized in that the tensioning tab (324) engages with a central portion (352) and an end portion (354) through the receiving aperture (342) and the central portion (352) and End portion (354) relative to each other under tension.

14. Sealing system (110) according to one of the preceding embodiments, characterized in that at least two tabs (324) of the carrier unit (208) in the sealing axis (212) radial direction in

Are arranged substantially opposite one another and, in particular, are connected to the clamp device (202) at points substantially opposite the radial direction in relation to the sealing axis (212).

15. Sealing system (110) according to one of the preceding embodiments, characterized in that at least one tab (324) with a closing element (282) of the locking system (204) is connected, in particular that these at least one tab (324), the closing element ( 282). 16. Sealing system (110) according to one of the preceding embodiments, characterized in that at least one tab (324) with a clamp lock (272) of the clamp device (202), which in particular two clamp jaws (216, 218) of the clamp device (202). connected to each other, is connected.

17. sealing system (110) according to the preceding embodiment, characterized in that the one or at least one of the plurality of receiving openings (342) on the clamp lock (272) is arranged.

18. sealing system (110) according to one of the preceding embodiments, characterized in that the clamp lock (272) comprises a bridge element (274) connecting the two clamp jaws (216, 218) and that at least one tab (324) at least partially between the Bridge element (274) and at least one of the clamp jaws (216, 218) is arranged, in particular between the bridge element (274) and the at least one clamp jaw (216, 218) is at least partially clamped.

19. Sealing system (110) according to one of the preceding embodiments, characterized in that the carrier unit (208) comprises a support portion (312) and that in particular the support portion (312) engages around the sealing element (206).

20. Sealing system (110) according to the preceding embodiment, characterized in that the support portion (312) as a support ring (314) is formed.

21. Sealing system (110) according to one of the preceding embodiments, characterized in that the support section (312) has receptacles (318) to which the sealing element (206), in particular a sealing ring (206), in particular with clamps, is attached. 22. Sealing system (110) according to one of the preceding embodiments, characterized in that the carrier unit (208), in particular the support section (312), and the sealing element (206), in particular a flat gasket (206), in the sealing axis (212 ) axial direction at least approximately equal thicknesses.

23. Sealing system (110) according to one of the preceding embodiments, characterized in that the carrier unit (208), in particular the carrier portion (312), in the axial direction to the sealing axis (212) has substantially a thickness which is smaller than one in this axial direction measured thickness of the sealing element (206), in particular of the sealing ring (206).

24. Sealing system (110) according to one of the preceding embodiments, characterized in that the carrier unit (208) is designed such that in an assembled state substantially only between end surfaces (172, 176) of connecting flanges (142,

144) of the pipe joint (100) is arranged.

25. Sealing system (110) according to one of the preceding embodiments, characterized in that the carrier unit (208) is integrally formed.

26. Sealing system (110) according to one of the preceding embodiments, characterized in that the carrier unit (208) in

Essentially formed of metal. 27. Sealing system (110) according to one of the preceding embodiments, characterized in that the sealing element (206) is a, in particular metallic, flat gasket (206).

28. Sealing system (110) according to one of the preceding embodiments, characterized in that the sealing element (206), in particular the sealing ring (206), is a volume sealing ring.

29. Sealing system (110) according to one of the preceding embodiments, characterized in that the sealing element (206), in particular the sealing ring (206), essentially consists of a soft-material seal,

in particular made of mica and / or graphite, and in particular comprises a metallic carrier film.

30. Sealing system (110) according to one of the preceding embodiments, characterized in that the clamp device (202) substantially in a circumferential direction around the sealing axis (212), in particular closed, runs around, in particular the two clamp jaws (216, 218) in the circumferential direction around the sealing axis (212) engage around.

31. Sealing system (110) according to one of the preceding embodiments, characterized in that the clamp device (202) has two flanks (264, 266), wherein in each case one of the flanks (264, 266) for the application of a respective tube end piece (102 , 104) of the pipe connection (100) is provided and wherein in particular the flanks (264, 266) for direct loading of the pipe end pieces (102, 104) are provided. 32. Sealing system (110) according to one of the preceding embodiments, characterized in that the clamp device (202), in particular its clamp jaws (216, 218), is essentially formed of metal and / or plastic / are.

33. Sealing system (110) according to one of the preceding embodiments, characterized in that the closing system (204) closes the clamp device (202), in particular releasably, under tension.

34. pipe connection (100) of two pipe end pieces (102, 104), which

is in particular part of a hot gas-carrying line (126), wherein a gap (106) between the two pipe end pieces (102, 104) by means of a

Sealing system (110) is sealed according to one of the preceding embodiments.

35. Pipe connection (100) according to embodiment 34, characterized in that the two pipe end pieces (102, 104) each have a connecting flange (142, 144) and that in particular in a mounted state of the pipe connection (100) in the sealing axis (212) radial Direction between the connecting flanges (142, 144) and the clamp device (202), in particular a receiving bottom (268) of a receptacle (262) of the clamp device (202), a free gap is arranged.

36. Pipe connection (100) according to embodiment 34 or 35, characterized in that flanks (264, 266) of the clamp device (202) the pipe end pieces (102, 104), in particular their respective connecting flange (142, 144) act directly on.

Further advantages and features of the invention are the subject of

following description and graphic representation of some

Embodiments. In the drawing show:

Fig. 1 is a sectional view through a first embodiment of a

Pipe connection with a sealing system;

FIG. 2 shows a perspective view of the sealing system comprising a clamp device, a carrier unit and a sealing ring; FIG.

Fig. 3 is a sectional view through the pipe joint in the region of

Clamp lock of the clamp device;

Fig. 4 is a sectional view of the pipe connection through a gap

between two clamp jaws of the clamp device in the region of the clamp lock;

5 shows a perspective view of the carrier unit;

Fig. 6 is a further sectional view through the pipe joint, wherein a

Pipe end is not shown in the drawing and a clamping element of the carrier unit is shown;

FIG. 7 shows a tab of a carrier unit of another exemplary embodiment, which passes through a receiving opening under tension; FIG.

Fig. 8a is a schematic representation of a tab with two wings of another embodiment;

8b is a sectional view through the clamp device with a pinched wing of the tab; 9 is a sectional view through a further embodiment of a pipe joint, wherein a pipe end of the same a flange stage and none of the pipe end has a groove and

Fig. 10 is a perspective view of a with a sealing element

integrally formed carrier unit.

In one embodiment, which is shown by way of example in FIGS. 1 to 6, a generally designated 100 pipe joint between two pipe end pieces 102 and 104 between which a gap 106 is present, the pipe end pieces 102 and 104 by a sealing system, which as a whole with 110 is connected.

In particular, the sealing system 110 holds the tube end pieces 102 and 104 together and seals the gap 106.

The pipe end pieces 102 and 104 each have wall pieces 112 and 114, which extend substantially hollow-cylindrical to a pipe connection axis 116.

The wall pieces 112 and 114 extend around the pipe connection axis 116 and thus each include an inner space 122 and 124, respectively. Through the pipe connection 100, the interior spaces 122 and 124 are fluidly connected, in particular for hot gas applications, so that the pipe end pieces 102 and 104 form a hot gas, in particular exhaust gases of an internal combustion engine, leading line 126.

The wall pieces 112 and 114 extend in opposite directions at least in a respective end portion of respective end sides 132 and 134 of the pipe end pieces 102 and 104, respectively, axially of the pipe connection axis 116. At the respective end side 132, 134 of the tube end pieces 102 and 104, a connecting flange 142 or 144 of the corresponding tube end piece 102 or 104 are respectively arranged.

In particular, the connecting flanges 142 and 144 are integrally formed with the respective wall piece 112 and 114, respectively.

The connecting flanges 142 and 144 extend on the end side 132 and 134, respectively, starting from the respective wall piece 112 or 114 substantially in the radial direction to the pipe connection axis 116 outward.

Each of the connection flanges 142 and 144 has a respective sealing surface 152 and 154, respectively, which are closed in a circumferential direction about the pipe connection axis 116 and extend at least approximately parallel to a geometric pipe connection plane 156 which is perpendicular to the pipe connection axis 116.

In particular, the pipe connection plane 156 extends substantially between the connection flanges 142 and 144.

The sealing surfaces 152 and 154 are disposed opposite each other in the pipe joint 100. In particular, the projections of the sealing surfaces 152 and 154 substantially coincide with the pipe joint plane 156.

Furthermore, the connecting flanges 142 and 144 have abutment surfaces 162 and 164, respectively, which in an axial direction relative to the pipe connection axis 116 on an outer side of the respective connecting flange 142, 144 opposite the respective sealing surface 152, 154

are arranged. The abutment surfaces 162 and 164 extend in the circumferential direction about the pipe connection axis 116 closed and extend obliquely sloping outwards in the radial direction to the pipe connection axis 116, so that in particular the connecting flanges 142 and 144 with increasing

Extension in the radial direction to the pipe connection axis 116 outward in the direction of the pipe connection axis 116 axial direction have a smaller extent.

For example, cut lines 166 and 168 of the abutment surface 162 and 164, respectively, with a sectional plane containing the pipe connection axis 116 to the intersection of the cutting plane with the pipe joint plane 156 at an acute angle W1 or W2.

In particular, the angles W1 and W2 are at least approximately the same size.

Preferably, the angle W1 and / or W2 is a maximum of 60 ° and a minimum of 10 °.

For example, one of the pipe end pieces, for example the pipe end piece 102, on the side facing the other pipe end piece 104 has a substantially flat end face 172 which runs closed around the pipe connection axis 116 in the direction of rotation.

In particular, the sealing surface 152 of this tube end piece 102 is part of the end surface 152.

In particular, the end surface 172 extends substantially parallel to the pipe connection plane 156. For example, the end surface 172 extends in the

Substantially in the pipe joint plane 156.

The other pipe end 104 has, for example, a groove 174. The groove 174 is open on a side facing the other pipe end 102 and extends substantially in axial direction to the pipe connection axis 116 to a groove bottom, which forms the sealing surface 154 in particular.

The connecting flange 144 of the tube end piece 104 having the groove 174 has, in particular, an end face 176 which extends in the direction of rotation closed around the tube connecting axis 116 and in the

Substantially parallel to the geometric pipe connection plane 156 extends.

The two end faces 172 and 176 of the pipe end pieces 102 and 104 face each other in the axial direction toward the pipe connection axis 116 and at least partially congruent, so that in particular projections of the end faces 176 and 172 at least partially coincide with the pipe joint plane 156, wherein the coincident part in the Circulation direction the pipe connection axis 116 rotates closed.

Preferably, one of the pipe end pieces 102, 104, for example the pipe end piece 104 having the groove 104, has a centering projection 184.

The centering projection 184 extends in axial direction to the pipe connection axis 116 from the pipe end 104 towards the other pipe end 102 and protrudes beyond the end surface 176 of the pipe end 104 in particular in this axial direction.

Conveniently, the centering projection 184 in the circumferential direction runs closed around the pipe connection axis 116 and thus forms, for example, a centering ring. It is preferably provided that the centering projection 184 is integrally formed with the wall piece 114 and in particular represents a continuation of the wall piece 114 in axial direction to the pipe connection axis 116, albeit with a reduced radial extent.

In particular, the centering projection 184 is essentially an axial continuation of an inner side of the wall piece 114 which is radial to the pipe connection axis 116.

Typically, it is provided that, in radial direction to the pipe connection axis 116, the centering projection 184 is arranged radially inward and the end surfaces 176 are arranged radially outward and the groove 174 extends therebetween.

The other tube end piece 102, which does not have the centering projection 184, has a receptacle 186, which is complementary to the

Centering projection 184 is formed.

In particular, therefore, the receptacle 186 is formed to the pipe connection axis 116 radially inwardly on the wall piece 112 and extends in particular in the direction of rotation closed around the pipe connection axis 116 around.

The gap 106 extends between the end faces 132 and 134 of the pipe end pieces 102 and 104 from a common interior of the pipe joint 100, which is formed by the internal spaces 122 and 124, to the pipe connection axis 116 radially outward. In addition, in particular, the gap 106 extends in the circumferential direction about the pipe connection axis 116th

closed around.

The sealing system 110, which is illustrated by way of example as a whole in a perspective view in FIG. 2, comprises a clamp device, generally designated 202, with a locking system 204, a sealing element designed as a sealing ring 206 and a carrier unit generally designated 208. The clamp device 202 essentially encompasses a sealing axis 212 which, in an assembled state of the pipe connection 100, coincides with the sealing system 110 substantially with the pipe connection axis 116.

In particular, the clamp device 202 has two clamp jaws 216 and 218 each extending from a first end 222, 224 to a respective second end 226, 228 respectively in a circumferential direction about the seal axis 212.

At a clamp lock, generally designated 232, the first ends 222 and 224 are interconnected and the jaws 216, 218 extend from the clamp lock 232 in opposite directions substantially in a direction of rotation about the seal axis 212 to their respective second end 226 or 228.

In this case, the clamp jaws 216 and 218 along their respective

Extension between the two ends 222 and 224 and 226 and 228 at least approximately the same radial distance from the sealing axis 212.

At their second ends 226, 228, the jaws 216 and 218 are preferably integrated into the locking system 204.

The clamp jaws 216 and 218 have along their extension between their ends 222 and 224 and 226 and 228 respectively two flank sections 242 and 244 and 246 and 248, wherein the respective flank sections 242, 244 and 246, 248 in particular by means of a respective connecting portion 252

or 254 are connected to each other (Fig. 2, 3). The flank sections 242, 244, 246, 248 and in particular also the

Connecting portions 252, 254 extend substantially in the circumferential direction about the sealing axis 212 between the respective ends 222, 224 and 226, 228 of the jaws 216 and 218, respectively.

The connecting portions 252 and 254 extend perpendicular to the circumferential direction substantially axially of the sealing axis 212.

Starting from the sealing axis 212 axially opposite

End portions of the respective connecting portion 252, 254, one of the flank portions 242, 244 and 246, 248 extends radially inwardly and extends obliquely to the radial direction with respect to the sealing axis 212, wherein the respective flank portions 242, 244 and 246, 248 with increasing radially inwardly directed extension diverge.

In particular, the flank sections 242, 244, 246, 248 extend in the

Substantially complementary to the respective abutment surfaces 162 and 164, wherein the flank portions 242, 244, 246, 248 preferably in the assembled state have a slightly smaller inclination to the pipe joint plane 156 than the abutment surfaces 162 and 164.

Thus, the respective flank portions 242, 244 and 246, 248 with the respective connecting portion 252, 254 of the respective clamp jaw 216, 218 each form a portion of a receptacle generally designated 262 for the connecting flanges 142 and 144, wherein the receptacle 262 two Flanks 264 and 266, which are formed by the respective flank portions 242 and 246 and 244 and 248 of the two clamp jaws 216 and 218, respectively. The flanks 264 and 266 extend mostly around the sealing axis 212 in the direction of rotation, and the flanks 264 and 266 extend axially toward each other as the radial extent increases.

The receptacle 262 is opened in the radial direction inwards relative to the sealing axis 212 in the direction of the sealing axis 212 and extends in this radial direction as far as a receiving base 268, which in this embodiment is essentially formed by the connecting sections 252 and 254.

The sides of the receptacle 262 are formed by the flanks 264 and 266.

At their first ends 222 and 224, the clamp jaws 216 and 218 are connected to each other with a clamp lock 272. At their second ends 226 and 228, the jaws 216 and 218 are preferably integrated into the locking system 204.

The clamp lock 272, which is shown by way of example also in FIGS. 3 and 4 in different sectional views, comprises in particular a bridge element 274.

The bridge element 274 is arranged at the first ends 222 and 224 of the clamp jaws 216 and 218, in particular welded. Thus, the clamp jaws 216, 218 are interconnected by the clamp lock 272.

In particular, bridge member 274 bridges a gap 276 between the first ends 222 and 224 of the two jaws 216, 218.

In this case, opposite end portions of the bridge element 274 at one end 222, 224 of the clamp jaws 216, 218th

arranged and disposed between the end portions central portion 278 of the bridge element 274 bridges the gap 276th The closing system 204 comprises at least one closing element 282 with which the clamp device 202 can be closed and, in particular, also be opened again. Preferably, the clamp device 202 is clamped by the closing system 204 with the closing element 282 around the pipe end pieces 102 and 104.

In this embodiment, the closing element 282 is a screw with a nut which engages through in each case an opening of two closing flanges 284 and 286. In this case, a screw head of the screw and the nut are arranged on mutually averted sides of the closing flanges 284 and 286, so that when the screw is screwed in, the closing flanges 284 and 286 are moved toward one another (FIG. 2).

The locking flanges 284 and 286 are arranged at the second ends 226 and 228 of the clamp jaws 216 and 218, in particular integrally formed therewith. In particular, the closing flanges 284 and 286 extend at least approximately in the radial direction to the sealing axis 212 and thereby preferably from the clamp jaws 216, 218 outwardly.

The sealing ring 206 has substantially the shape of a sealing axis 212 closed ring encircling.

Preferably, the sealing ring 206 is formed as a soft-material seal.

Of the sealing axis 212, the sealing ring 206 has a substantially smaller distance than the clamp device 202, so that in particular the clamp device 202 surrounds the sealing ring 206 in radial direction to the sealing axis 212.

The carrier unit 208, which is shown separately as an example in FIG. 5 as a component, comprises a carrier section 312 which in particular surrounds the sealing ring 206. The support portion 312 extends with respect to the sealing axis 212 substantially in the circumferential direction. In particular, the support portion 312 is formed as the sealing axis 212 closed circumferential support ring 314.

In this case, the carrier section 312 is preferably designed in the manner of a band, wherein it extends essentially as a band in the circumferential direction about the sealing axis 212. In this case, an extension of the band-like carrier section in the axial direction to the sealing axis 212 is substantially smaller than an extension thereof in the radial direction.

For example, the support section 312, in particular with an inner radius measuring a minimum distance to the sealing axis 212, has a slightly greater radial distance to the sealing axis 212 than the sealing ring 206 so as to encompass the sealing ring 206.

In particular, the carrier section extends to the sealing axis 212 radially outside the sealing ring 206, the carrier section 312 and the sealing ring 206, in particular with a radial inner side of the former or a radial outer side of the latter, being arranged adjacent to one another.

In particular, the support section is made thinner in the axial direction relative to the sealing axis 212 than the sealing ring 206.

The seal ring 206 is fixed to the support portion 312. For this purpose, in particular receptacles 318 are arranged on the support section 312.

The receivers 318 are, for example, arranged bridge-like on the support section 312 with two support legs and a bridge section connects the two support legs. The bridge section and the two support legs engage around a passage opening which is formed by the receptacle 318.

In this embodiment, it is provided that the sealing ring 206 is fastened with clips to the carrier unit 208, in particular to the carrier section 312.

The brackets engage through the through openings of the receptacles 318 and thus hold at one end the sealing ring 206 and are connected at its other end to the support portion 312.

In this embodiment, it is provided that the carrier unit 208 is connected to the clamp device 202 by means of clamping elements 322 and tabs 324a, 324b. In variants of the embodiment it is provided that the carrier unit 208 is connected to the clamp device 202 in only one of these ways.

Above and below, elements with at least the fundamentally identical function are provided with the same reference number (here tabs 324) and the variants with attached letters a, b,... Are marked only insofar as features of the respective variant are described.

The clamping elements 322 are wing-like, with two clamping arms 332 thereof are connected to each other at one of its ends, for example by a connecting part.

In particular, the clamping arms 332, in particular bent, extend outward from the carrier section 312 in a direction radial to the sealing axis 212.

The clamping arms 332 are connected at its end closest to the carrier section 312, in particular by means of the connecting part. Preferably, two clamping elements 322 are arranged in radial direction relative to the sealing axis 212 on opposite sides of the carrier section 312, in particular of the carrier ring 314, and the clamping elements 322 have at least approximately the same distance in the circumferential direction about the sealing axis 212 to adjacent clamping elements 322.

The carrier unit 208 has substantially a smaller radial extent with respect to the sealing axis 212 than the clamp device 202. In particular, a radial outer radius of the carrier section 312 is smaller than a radial inner radius of the clamp device 202, in particular in the region of its receptacle 262.

As a result, the clamp device 202 surrounds the carrier unit 208 in a direction radial to the sealing axis 212.

The clamping elements 322 engage in the radial direction to the sealing axis 212 outwardly into the receptacle 262 into (FIG. 6).

In this case, the clamping arms 332, in particular with their ends remote in the radial direction from the carrier section 312, rest on the receiving base 268. In this case, the clamping elements 322 are tensioned and keep the carrier unit 208 under pretension in the clamp device 202.

The receptacle 262 of the clamp device is dimensioned in this case, in particular its recess in radial direction to the sealing axis 212

Direction that in the assembled state between the ends in the radial direction of the connecting flanges 142 and 144 and the receiving base 268 remains a free gap in which the clamping elements 322 are arranged. As a result, the clamping elements 322, the support unit 208 under

Connect bias with the clamp device 202 and are not clamped in the assembled state between the connecting flanges 142 and 144 on the one hand and the receiving floor 268 on the other hand.

In addition, by dimensioning with the free gap for the clamping elements 322 sufficient space between the connecting flanges 142 and 144 and the clamp device 202 is present and the clamping elements 322 are not in the way of closing the clamp device 202 this in the way, so that necessary for the sealing Contact pressure by the clamp device 202 can be achieved.

The tabs 324 extend outwardly away from the support portion 312 in a radial direction toward the sealing axis 212, and are preferably substantially band-like.

One of the tabs 324a is arranged in the assembled state in the region of the closing system 204 and connected thereto.

Here, the tab 324a surrounds the closing element 282 forming

Screw. For this purpose, the tab 324a is hook-shaped at its end remote from the support section 312, so that the tab 324a rests on one side of the screw and extends around the circumference of the screw (FIG. 2).

Another tab 324b is arranged in the assembled state in the region of the clamp lock 272 and connected thereto.

For this purpose, the bridge element 274 has a receiving opening 342 through which the tab 324b passes (FIGS. 3 and 4).

In particular, the tab 324b extends from the support portion 312 through the gap 276 toward the bridge member 274 and engages the receiving opening 342. At its end remote from the carrier section 312, this tab 324b is also preferably substantially hook-shaped, so that it hooks into the receiving opening 342. For example, a middle section 352 of the tab 324b engages through the receiving opening 342 and an end section 354 of the hook-shaped end engages above the receiving opening 342 via the bridge element 274 in the direction of the carrier section 312.

In this case, the carrier unit 208 is preferably punched in one piece from a metal sheet and the corresponding elements, in particular the receptacle 318, the clamping elements 322 and the tabs 324 formed into their corresponding shapes, preferably bent over.

Thus, the sealing system 110 of the pipe joint 100, in summary, operates as follows:

The clamp device 202 engages, in particular with its clamp jaws 216 and 218, the carrier unit 208 and the sealing ring 206, wherein the sealing ring 206 is held by the carrier unit 208 and the carrier unit 208 is connected to the clamp device 202. This can be done in the

Essentially unitary elements of the sealing system 110 are taken by a fitter with one hand and placed on one of the pipe end pieces 102, 104 for mounting to the pipe joint 100.

In this case, the carrier unit 208 by the clamping elements 322 in

Mainly held positionally true in the clamp device 202 and by means of the connection with the tabs 324 is a twisting of the

Sealing ring 206 on the one hand and a rotation of the clamp jaws 216 and 218 reduced to each other, preferably substantially prevented. In one step, both the sealing ring 206 can be inserted into the groove 174 and the clamp device 202 via the

Connecting flange 144 of the pipe end 104 are drawn with the groove 174, wherein the connecting flange 144 at least partially in the

Receiving 262 of the clamp device 202 engages.

In the assembled state, the sealing axis 212 and the pipe connection axis 216 essentially coincide.

Since the clamp device 202 with the carrier unit 208 and the sealing ring 206 substantially form a unit, these elements are firmly seated on the pipe end 104 and the installer alone can place the other pipe end 102 on the pipe end 104 with its connecting flange 142 also engaging the receiver 262 ,

When placing the centering projection 184 engages the receptacle 186 and thus facilitates a precise alignment of the pipe end pieces 102 and 104 to each other.

As a result, the sealing ring 206 and the carrier unit 208 lie in the gap 106 between the pipe end pieces 102 and 104.

The flanks 264 and 266 of the clamp device abut against the abutment surfaces 162 and 164 of the connecting flanges 142 and 144.

With the closing system 204, the clamp device 202 is closed, wherein its relative to the sealing axis 212 radial expansion is reduced and the clamp jaws 216 and 218 contract in the radial direction. In this case, the flanks 264 and 266 press at least substantially in the radial direction on the abutment surfaces 162 and 164, wherein the oblique course directs the substantially radially directed force into a substantially axially aligned force.

Thus, the pipe end pieces 102 and 104 are pressed together in relation to the pipe connection axis 116 substantially in the axial direction. The power main conclusion takes place preferably via the

End surfaces 172 and 176 of the connecting flanges 142 and 144th

In addition, the pipe end pieces 102 and 104 with the sealing surfaces 152 and 154 press on the sealing ring 206 and between the pipe end pieces 102 and 104 and the sealing ring 206 form sealing lines, which the pipe joint 100, in particular the gap 106, fluid-tight, in particular hot gas tight, close. In particular, the sealing lines run around the pipe connection axis 116 substantially in the direction of rotation

closed around.

In a further embodiment, shown by way of example in FIG. 7, it is provided that a tab 324c engages under tension through a receiving opening 342.

In this case, the tab 324c extends in an unobstructed state oblong from the support portion 312 away. In this case, a central portion 352 of the tab 324c between an end portion 354 of the tab 324c and the support portion 312 is arranged.

In the assembled state, the tab 324c grips from the

Carrier portion 312 with the central portion 352 through the receiving opening 342 therethrough. Between the central portion 352 and the end portion 354, the tab 324c is bent over at one location and the end portion 354 engages back through the receiving opening 342.

Due to the bent location, the central portion 352 and the end portion 354 spread apart and brace the tab 324c in the

Receiving opening 342.

Incidentally, all the other parts of the embodiment are as in the first embodiment, so that with respect to the description thereof may be made in full to the comments on the preceding embodiment.

In yet another embodiment, exemplified in FIGS. 8a and 8b, a tab 324d has two wings 358.

The wings 358 are connected to each other at one of their ends and extend from their connected ends in opposite directions from each other, in particular oblong, in an extension direction away.

Via a central portion 352 which is connected at the interconnected ends of the wings 358 with these and transversely to the latter

Extending direction extends, the wings 358 are connected to the support portion 312.

By means of the wings 358, the tab 324d is attached to the clamp device 202, in particular to the clamp lock 272.

Preferably, the middle section 352 engages through the gap 276, and one of the wings 358 abuts the sealing axis 212 radially outwardly against a respective one of the clamp jaws 216 and 218. Here, the wings 358 in particular between each one of the clamp jaws 216, 218 and the bridge member 274 clamped and connected thereto.

Incidentally, all the other parts in this embodiment are the same as in any of the above embodiments, so that with respect to the description of the same reference in full to the above statements

is taken.

In a further embodiment of a pipe connection 100e, which is shown by way of example in FIG. 9, one of the pipe end pieces 104e has a flange stage 372 in which the sealing ring 206 is positioned in the assembled state. In contrast to the first embodiment, none of the pipe end pieces 102e, 104e has a groove 174.

The flange stage 372 is formed by a centering section 374, wherein the centering section 374 is formed substantially corresponding to the centering projection 184.

In particular, the centering section 374 is arranged on an inner side of the pipe end piece 104e which is radial to the pipe connection axis 116 and extends in the axial direction towards the other pipe end piece 102e.

In this respect, the centering portion 374 forms an axial continuation of the pipe end 104e, but with reduced radial extent.

The centering section 374 runs closed around the pipe connection axis 116 in the circumferential direction and thus forms a centering ring. At an end of the centering section 374 which projects furthest in the axial direction to the pipe connection axis 116, the latter has an end face 176 which extends at least approximately parallel to the pipe connection plane 156 and preferably runs closed around the pipe connection axis 116.

Preferably, the centering portion 374 is wide, for example, wider than the centering projection 184 in the first embodiment,

formed, so that the main force connection at the pipe connection LOOOE can be made via the end face 176 of the Zentrierungsabschnitts 374.

At a bottom 376 of the centering section 374 that is opposite the end faces 176 in the axial direction, the centering section 374 extends into the wall section 114 in the axial direction relative to the pipe connection axis 116 and the connecting flange 144e extends outward in the radial direction.

In this case, the connecting flange 144e, starting from the bottom 376, has a substantially flat step surface, which extends in particular at least approximately parallel to the pipe connecting plane 156.

This substantially planar step surface extends outwardly from the bottom 376 in a radial direction to the pipe connection axis 116 up to a radial end region of the connection flange 144e.

The step surface extending radially outwardly from the bottom 376 includes the sealing surface 154.

The other tube end piece 102e has a receptacle 186e, which is formed essentially corresponding to the receptacle 186 of the first embodiment, wherein the receptacle 186e is designed to receive the centering section 374. For this purpose, the receptacle 186e has an end face 172 lying on the inside of the pipe connection axis 116 and lying opposite the end face 176 of the centering section 374 in the axial direction and complementary thereto.

Starting from the receptacle 186 e, the connecting flange 142 e extends outward in the radial direction to the pipe connection axis 116.

In particular, the connecting flange 142e has an end opposite the connecting flange 144e of the other tube piece 104e, with a substantially flat surface extending at least approximately parallel to the pipe connecting plane 156, which extends in the radial direction to the radial outer end of the connecting flange 142e.

This substantially flat surface comprises the sealing surface 152 of the connecting flange 142e.

In this embodiment, the sealing ring between the sealing surfaces 152 and 154 of the two connecting flanges 142e and 144e is arranged in the assembled state and forms with these the pipe connecting axis 116 in the circumferential direction closed circumferential sealing lines.

The main force connection at the pipe connection 100e takes place via the

End surfaces 176 of the Zentrierungsabschnitts 374 and the end surface 172 of the receptacle 186 e.

Incidentally, all the other parts in this embodiment are the same as in one of the above-described embodiments, so that with regard to the description thereof, reference is made in full to the above statements. In a further embodiment, it is provided that the sealing element 206 is formed as a flat gasket 206 and in particular the sealing element 206 is integrally formed with the support unit 208, in particular its support section 312, which preferably forms a support ring 314, these elements being shown by way of example in FIG. 10 are shown.

In particular, it is provided that the carrier unit with the sealing element 206 is formed together from a metal, in particular from a metal sheet.

In this case, the carrier ring 314 and the flat gasket 206 together form a one-piece ring, which runs closed around the sealing axis 212 in the circumferential direction.

In particular, the carrier ring 314 extends to the sealing axis 212 radially outside the flat seal 206, which connects radially inwardly integrally to the support ring 314.

In this embodiment, clamping elements 322 are provided with clamping arms 332.

In variants of the exemplary embodiment, it is provided that the carrier unit has tabs 324 as an alternative or in addition.

For example, lugs 392 are still provided, which, in particular in one piece, to the support ring 114 and / or the flat gasket 206th

are arranged. With the lugs 392, the support unit 208 with the flat gasket 206, for example, during a transport of the clamp device to this, in particular clipped on one of its clamp jaws 216, 218 or, for example, during assembly of the pipe connection, the lugs can be applied to one of the pipe end pieces 102, 104 and with these, the support unit 208 with the flat gasket 206 are temporarily pressed against the pipe end piece 102, 104, so that for assembly these elements are fixed to the pipe end piece 102, 104 for assembly and assembly is facilitated.

In particular, the connecting flanges 142, 144 point toward the carrier unit 208, in particular its carrier ring 314, and the flat gasket 206

complementarily formed end surfaces 172 and 176 and sealing surfaces 152, 154. In particular, in this embodiment, in which the sealing member 206 is formed as a flat gasket 206, in the

Connecting flanges 142 and 144 no groove provided.

Incidentally, all other parts in this embodiment are formed as in one of the above-described embodiments or variants thereof, so that with respect to the description of the same fully incorporated by reference to the preceding statements.

Claims

PATENT APPLICATIONS

A sealing system (110) for a pipe joint (100), in particular for hot gas applications, comprising a sealing element (206), a clamp device (202) with a locking system (204) and a carrier unit (208), wherein the carrier unit (208) the sealing element (206) and the carrier unit (208) is connected to the clamp device (202).

Second sealing system (110) according to claim 1, characterized in that the carrier unit (208) is connected under prestress with the clamp device (202), in particular held by the latter.

3. Sealing system (110) according to any one of the preceding claims, characterized in that the carrier unit (208) comprises at least one clamping element (322), wherein the at least one clamping element (322) is supported on the clamp device (202).

4. sealing system (110) according to any one of the preceding claims, characterized in that the carrier unit (208) comprises a plurality of clamping elements (322), which the carrier unit (208) in the

Clamp the clamp device (202).

5. sealing system (110) according to any one of the preceding claims, characterized in that the one or at least one clamping element (322) at least one clamping arm (332), in particular two clamping arms (332) comprises.

6. sealing system (110) according to any one of the preceding claims, characterized in that at least one clamping arm (332) is supported on the clamp device (202), in particular all clamping arms (332) of the support unit (208) on the clamp device (202 ).

7. sealing system (110) according to any one of the preceding claims, characterized in that at least two clamping elements (322) in a sealing axis (212) radial direction are arranged substantially opposite one another.

8. sealing system (110) according to any one of the preceding claims, characterized in that the carrier unit (208) comprises a tab (324) or a plurality of tabs (324) and in particular that the carrier unit (208) by means of the one tab (324) or means the plurality of tabs (324) is connected to the clamp device (202).

9. sealing system (110) according to the preceding claim,

characterized in that at least one tab (324) of the support unit (208) is configured such that in a mounted state of the sealing system (110), this tab (324) from outside the pipe joint (100) is visible.

10. Sealing system (110) according to any one of the preceding claims, characterized in that the clamp device (202) at least one receiving opening (342) for at least one tab (324) of the carrier unit (208) and in particular that at least one tab (324) through the receiving opening (342) engages.

11. Sealing system (110) according to one of the preceding claims, characterized in that at least one tab (324) is hooked in at least one receiving opening (342), wherein in particular an end portion (354) of the tab (324) is hook-shaped, in particular bent is.

12. Sealing system (110) according to one of the preceding claims, characterized in that at least one tab (324) engages through at least one receiving opening (342) under tension, that in particular the one tab (324) in the receiving opening (342 ) is clamped.

13. sealing system (110) according to the preceding claim,

characterized in that the tension-engaging tab (324) engages with a central portion (352) and an end portion (354) through the receiving aperture (342) and the middle portion (352) and the end portion (354) are tensioned relative to one another ,

14. Sealing system (110) according to one of the preceding claims, characterized in that at least two tabs (324) of the carrier unit (208) are arranged in the radial direction substantially opposite to the sealing axis (212) and in particular with respect to the sealing axis (212). Radial direction substantially opposite locations with the clamp device (202) are connected.

15. Sealing system (110) according to any one of the preceding claims, characterized in that at least one tab (324) with a closing element (282) of the locking system (204) is connected, in particular that these at least one tab (324) the closing element ( 282).

16. Sealing system (110) according to any one of the preceding claims, characterized in that at least one tab (324) with a clamp lock (272) of the clamp device (202) which in particular two clamp jaws (216, 218) of the clamp device (202) interconnects , connected is.

17. Sealing system (110) according to the preceding claim,

characterized in that the one or at least one of the plurality of receiving openings (342) is arranged on the clamp lock (272).

18. Sealing system (110) according to one of the preceding claims, characterized in that the clamp lock (272) comprises a bridge element (274) connecting the two clamp jaws (216, 218) and that at least one lug (324) is at least partially located between the bridge element (32). 274) and at least one of

Clamp jaws (216, 218) is arranged, in particular between the bridge element (274) and the at least one clamp jaw (216, 218) is at least partially clamped.

19. Sealing system (110) according to any one of the preceding claims, characterized in that the carrier unit (208) comprises a support portion (312) and in particular that the support portion (312) engages around the sealing element (206).

20. Sealing system (110) according to the preceding claim,

characterized in that the carrier section (312) is designed as a carrier ring (314).

21. Sealing system (110) according to any one of the preceding claims, characterized in that the support portion (312) has receptacles (318) on which the sealing element (206), in particular a sealing ring (206), in particular with clips, is attached.

22. Sealing system (110) according to any one of the preceding claims, characterized in that the carrier unit (208), in particular the support portion (312), and the sealing element (206), in particular a flat gasket (206), in the sealing axis (212) axial Direction at least approximately equal thicknesses has up.

23, sealing system (110) according to any one of the preceding claims, characterized in that the carrier unit (208), in particular the support portion (312) in the sealing axis (212) axial direction substantially has a thickness which is smaller than one in this axial direction measured thickness of the sealing element (206), in particular of the sealing ring (206).

24. Sealing system (110) according to any one of the preceding claims, characterized in that the carrier unit (208) is designed such that it in an assembled state in

Essentially only between end surfaces (172, 176) of

Connecting flanges (142, 144) of the pipe connection (100)

is arranged.

25. Sealing system (110) according to one of the preceding claims, characterized in that the carrier unit (208) is integrally formed.

26. Sealing system (110) according to any one of the preceding claims, characterized in that the carrier unit (208) is formed substantially of metal.

27. Sealing system (110) according to one of the preceding claims, characterized in that the sealing element (206) a,

in particular metallic, flat gasket (206).

28. Sealing system (110) according to one of the preceding claims, characterized in that the sealing element (206), in particular the sealing ring (206), is a volume sealing ring.

29 sealing system (110) according to any one of the preceding claims, characterized in that the sealing element (206), in particular the sealing ring (206), substantially of a soft material seal, in particular of mica and / or graphite, and in particular a metallic carrier film includes.

30. Sealing system (110) according to one of the preceding claims, characterized in that the clamp device (202) in

Essentially in a circumferential direction around the sealing axis (212), in particular closed, runs around, in particular, the two clamp jaws (216, 218) in the circumferential direction around the sealing axis (212) engage around.

31 sealing system (110) according to any one of the preceding claims, characterized in that the clamp device (202) has two flanks (264, 266), wherein each one of the flanks (264,

266) for the admission of a respective tube end piece (102, 104) of the pipe connection (100) is provided and wherein in particular the flanks (264, 266) for direct loading of the pipe end pieces (102, 104) are provided.

32. Sealing system (110) according to any one of the preceding claims, characterized in that the clamp device (202), in particular its clamp jaws (216, 218), is formed substantially of metal and / or plastic / are.

33. Sealing system (110) according to any one of the preceding claims, characterized in that the closing system (204) closes the clamp device (202), in particular releasably, under tension.

34. pipe connection (100) of two pipe end pieces (102, 104), which

in particular, is part of a hot gas conducting duct (126), wherein a gap (106) between the two pipe end pieces (102, 104) is sealed by means of a sealing system (110) according to any one of the preceding claims.

35. Pipe connection (100) according to claim 34, characterized in that the two pipe end pieces (102, 104) each have a connecting flange (142, 144) and that in particular in an assembled state of the pipe connection (100) in the sealing axis (212) radial direction between the connecting flanges (142, 144) and the clamp device (202), in particular a receiving bottom (268) of a receptacle (262) of the clamp device (202), a free gap is arranged.

36. Pipe connection (100) according to claim 34 or 35, characterized in that flanks (264, 266) of the clamp device (202) the pipe end pieces (102, 104), in particular their respective

Connecting flange (142, 144), directly pressurized.