connector

Abstract

Connecting piece (400) for connecting two pipe sections (10, 20) that are sealable against each other and have end surfaces (12, 22), wherein an element (430) has a flange part (410) with respect to which the corresponding end surfaces (12, 22) of the pipe sections (10, 20) can be arranged such that they interact with it, and sealing elements (432, 434) which are arranged such that they interact sealingly with the pipe sections (10, 20) in the assembled state, wherein the sealing elements (432, 434) form a part of the element (420), characterized in that the connecting piece (400) further comprises a sleeve part (420) which is connected to the flange part (410) which is arranged such that it seals against the pipe sections (10, 20) in the assembled state, wherein the sleeve part (420) in the assembled state is essentially arranged inside the pipe areas (10, 20) and wherein the flange part (410) is arranged on the outside of the sleeve part (420).

Description

Technical field of the invention

[0001] The invention relates to a connecting piece according to the preamble of claim 1. background

[0002] When joining pipes, a common problem is meeting the high tolerances of the pipe at the joint. One solution involves connecting such pipes using a hose and hose clamps. This type of connection can be applied to existing pipes and requires only minor modifications to the pipes being joined. However, a drawback of using a hose and hose clamps is the potential difficulty in creating a leak-proof seal, partly due to temperature fluctuations. Furthermore, this type of connection has its own lifespan issues, as the rubber and materials used in its construction deteriorate over time and are susceptible to disintegration. Another alternative is the use of a bellows connector, i.e.,The pipe ends are connected using a bellows to make the connection flexible. However, bellows connectors are relatively expensive and have a relatively short lifespan.

[0003] US 5,106,129 A describes an example of an alternative solution in which a fitting in the form of a pipe section is used to join two pipes. The pipe section has radial seals at each end, and the end section of each pipe has a larger diameter to guide the seal axially and to avoid increasing the pressure drop across the seal. One disadvantage of such a solution is that the pipes to be joined must have a modified geometry at their ends, which increases the manufacturing cost of the pipe. Another problem is that existing pipes require the replacement of the entire pipe if, for example, one wants to replace a hose connection with hose clamps.

[0004] Further state of the art is known from GB 1 010 664 A, DE 198 58 295 C1 and GB 904 622 A. Object of the invention

[0005] One object of the present invention is to provide an improved connector for joining two pipe sections, in particular a connector that meets high tolerances for the pipe sections, offers good leak tightness and enables a long service life and cost-effective connection. Brief description of the invention

[0006] These and other tasks, set out in the following description, are achieved by means of a connecting piece of the type specified above, which also has the features specified in the characterizing part of the independent claim. Preferred embodiments of the connecting piece are defined in the independent claims.

[0007] According to the invention, these problems are solved by means of a connector for tightly joining two pipe sections with opposing end faces, which has a flange part with respect to which the end faces of the pipe sections are arranged in such a way that they interact with it. This makes it possible to join the pipe sections with high tolerances and with good sealing without affecting the geometry of the end face of each respective pipe section, thus creating a cost-effective connection.

[0008] According to one embodiment of the connector, the flange section is positioned at a distance between the end faces when assembled. The connector is thus guided axially. The flange section allows axial movement of each pipe section independently of the other pipe section, with the corresponding end faces of each pipe section engaging with one another.

[0009] According to one embodiment, the connecting piece further comprises a sleeve part which is connected to the flange part and arranged in such a way that it seals against the pipe sections. This facilitates sealing against the corresponding pipe sections.

[0010] According to a non-inventive embodiment of the connector, the sleeve part is arranged essentially on the outside of the pipe sections in the assembled state, while the flange part is arranged inside the sleeve part. This makes it possible to maintain essentially corresponding diameters at the connection between the pipe sections in order to minimize the effects of flows through the pipe sections via the connector.

[0011] According to one embodiment of the connector, the sleeve part is essentially located inside the pipe sections when assembled, while the flange part is located on the outside of the sleeve part. This makes it possible to achieve a compact connection, as the connector does not need to extend radially over each individual pipe section.

[0012] According to a non-inventive embodiment of the connector, the flange part is arranged on the inside and outside of the sleeve part. This facilitates the connection of pipe sections with different diameters.

[0013] According to one embodiment of the connector, the flange part is positioned essentially centrally when viewed in the axial direction of the sleeve part. This facilitates a good seal regardless of axial movement of the connector relative to the pipe sections.

[0014] According to one embodiment of the connector, the flange part is arranged circumferentially around the sleeve part. This allows for a simple design of the connector.

[0015] According to one embodiment of the connector, the flange part has flexible areas with respect to which the end faces are arranged to interact. This creates a connection that reduces the effects of the pipe sections abutting the flange part, thereby reducing wear.

[0016] According to one embodiment, the connecting piece has sealing elements arranged in such a way that they interact with the pipe sections to create a seal. This achieves an effective seal.

[0017] According to one embodiment of the connector, the sealing elements have O-ring elements on the sleeve part. This achieves an effective seal.

[0018] According to one embodiment of the connector, the sealing elements have components that are vulcanized to the sleeve section. This achieves an effective seal. Furthermore, it allows the use of an annular cylindrical sleeve section without having to modify the diameter externally or internally in the form of recesses and / or projections, so that the vulcanized components also have a flange section with flexible properties for interaction via the end faces of the pipe sections. Description of the drawings

[0019] The present invention will be better understood with reference to the following detailed description in conjunction with the accompanying drawings, in which the same reference numerals consistently identify the same parts in the different views. The drawings show: Fig. 1a schematically a view in the axial direction of a non-inventive example of a connecting piece for joining two pipe sections; Fig. 1b schematically an axial sectional view of the connector in Fig. 1a; Fig. 2a schematically a view in the axial direction of another non-inventive example of a connector for joining two pipe sections; Fig. 2b schematically an axial sectional view of the connector in Fig. 2a; Fig. 3a schematically a view in the axial direction of another non-inventive example of a connector for connecting two pipe sections; Fig. 3b schematically an axial sectional view of the connector in Fig. 3a; Fig. 4a schematically a view in the axial direction of a connecting piece according to the invention for connecting two pipe sections; Fig. 4b schematically an axial sectional view of the connector in Fig. 4a; Fig. 5 schematically a view in the axial direction of another non-inventive example of a connector for joining two pipe sections; Fig. 6 schematically a view in the axial direction of another non-inventive example of a connector for connecting two pipe sections. Description of examples and embodiments

[0020] Fig. Figure 1a schematically shows a view in the axial direction of a connecting piece 100 for connecting two pipe sections 10, 20 according to a first non-inventive example, Fig. 1b an axial sectional view AA of the connecting piece 100 in Fig. 1a.

[0021] The connecting piece 100 is arranged such that, mutually sealed and with opposing end faces, it connects a first pipe section 10 and a second pipe section 20. The first pipe section 10 thus has an end face 12 and the second pipe section 20 has an end face 22.

[0022] The connecting piece 100 has a flange part 110, with respect to which the respective end faces 12, 22 of the pipe sections 10, 20 are arranged such that they interact with it. In the assembled state, the flange part 110 is arranged at a distance between the end faces 12, 22. The flange part 110 has a first side 112, which is intended to face the first pipe section 10, and an opposing second side 114, which is intended to face the first pipe section 20.

[0023] The connecting piece 100 further comprises a sleeve part 120, which is connected to the flange part and arranged such that it seals against the pipe sections 10 and 20. The flange part 100 is located inside the sleeve part 120. The flange part 110 is arranged such that it extends radially from the sleeve part 120 into the sleeve part 120. In the assembled state, the sleeve part 120 is located outside the pipe sections 10 and 20, and the flange part 110 is located between the respective end faces 12 and 22 of the pipe sections 10 and 20.

[0024] The sleeve part 120 has a first overlapping section 122, which is arranged between the edge of the sleeve part that opens towards the first pipe section 10 in the assembled state and the first side of the flange part 110, and a second overlapping section 124, which is arranged between the edge of the sleeve part 120 that opens towards the second pipe section 20 in the assembled state and the second side 114 of the flange part 110. The first overlapping section 122 is arranged such that, in the assembled state, it overlaps an end section of the first pipe section 10 on the outside. The second overlapping section 124 is arranged such that, in the assembled state, it overlaps an end section of the second pipe section 20 on the outside.

[0025] The flange part 110 is arranged essentially centrally in the axial direction of the sleeve part. The flange part 100 is arranged circumferentially around the inside of the sleeve part 120.

[0026] The flange part 110 further comprises flexible sections 132, 134, with respect to which the end faces 12, 22 of the pipe sections 10, 20 are arranged such that they interact with them. The flexible sections 132, 134 have a first damping element 132 arranged on the first side 122 of the flange part 110 and a second damping element 134 arranged on the second side 144 of the flange part 110. The first damping element 132 is arranged in a first circumferential recess 112a on the first side 122 and the second damping element 134 is arranged in a second circumferential recess 114a on the second side 114 of the flange part 110. According to one embodiment, the first and the second damping elements 132, 134 are formed from sealing rings such as O-rings. The first damping element 132 is arranged in such a way that it is flexible and dampingly interacts with the end surface 12 of the first pipe section 10.The second damping element 134 is arranged in such a way that it is flexible and dampingly interacts with the end surface 22 of the second tube section 20.

[0027] The connecting piece 100 further comprises sealing elements 142, 144, which are arranged such that they interact sealingly with the pipe sections 10, 20. The sealing elements 142, 144 have O-ring elements 142, 144 on the sleeve part 120. The sealing elements 142, 144 have a first O-ring element 142, which is arranged such that it interacts sealingly with the first pipe section 10, and a second O-ring element 144, which is arranged such that it interacts sealingly with the second pipe section 20.

[0028] The first O-ring element 142 is arranged in an inner recess 122a in the first overlap section 122 of the sleeve section 120. The second O-ring element 144 is arranged in an inner recess 142a in the second overlap section 124 of the sleeve section 120. The first O-ring element 142 is arranged such that it seals against the first pipe section 10. The second O-ring element 144 is arranged such that it seals against the second pipe section 20.

[0029] Fig. Figure 2a schematically shows a view in the axial direction of a connecting piece 200 for connecting two pipe sections 10, 20 according to a further non-inventive example. Fig. 2b is an axial sectional view AA of the connector 200 in Fig. 2a.

[0030] The connecting piece 200 according to the in Fig. The example shown in 2a to 2b differs from the connecting piece 100 according to the one in Fig. 1a to b shown first example in the design of the bendable elements of the flange part 210 and the sealing elements.

[0031] The connecting piece 200 according to the second example has an element 230 mounted by vulcanization. The element 230 is mounted inside the sleeve part 220 of the connecting piece 200. The element 230 forms a flexible layer. The element 230 is preferably made of an elastic material such as rubber. According to one embodiment, the element 230 is made of fluororubber.

[0032] According to this example, element 230 has a flange part 210, with respect to which the respective end faces 12, 22 of the pipe sections 10, 20 are arranged such that they interact with it. A part of element 230 is thus formed by the flange part 210. The flange part 210 has a first side 212, which is intended to face the first pipe section 10 in the assembled state, and an opposite second side 214, which is intended to face the second pipe section 20 in the assembled state. The flange part 210 is arranged substantially centrally in the axial direction of the sleeve part 220. The flange part 210 is arranged circumferentially around the inside of the sleeve part 220. In the assembled state, the flange part 210 is positioned at a distance between the end faces 12, 22.

[0033] The element 230, mounted inside the sleeve part 220, is configured to be flexible. Since the flange part 210 forms part of the element 230, the flange part 210 is also formed from flexible areas 212, 214 in the shape of the sides 212, 214, with respect to which the end faces are arranged to interact with them. The flange part 210 is thus configured to be flexible, such that the first side 212 of the flange part 210 interacts flexibly and dampingly with the first pipe section 10, and the second side 214 of the flange part 210 interacts flexibly and dampingly with the second pipe section 20.

[0034] The sleeve part 220 also has a first 222 and a second 224 overlap section. The first overlap section 222 is arranged between the end of the sleeve part 220, which opens towards the first pipe section 10 in the assembled state, and the first side 212 of the flange part 210. The second overlap section 224 is arranged between the end of the sleeve part 220, which opens towards the second pipe section 20 in the assembled state, and the second side 214 of the flange part 210.

[0035] According to this example, element 230 has sealing elements 232 and 234. Sealing elements 232 and 234 thus form part of element 230. Sealing elements 232 and 234 comprise a first sealing element 232, which is arranged to seal against the first pipe section 10, and a second sealing element 234, which is arranged to seal against the second pipe section 20.

[0036] The first sealing element 232 is arranged inside the sleeve part 220 as part of the element 230. The second sealing element 234 is arranged inside the sleeve part 220, which is part of the element 230. The first sealing element 232 is arranged such that, in the assembled state, it seals against the first pipe section 10. The second sealing element 234 is arranged such that, in the assembled state, it seals against the second pipe section 20. The first sealing element 232 consists of a circumferentially inwardly bent projection 232 on the first overlap section 222. The second sealing element 234 consists of a circumferentially inwardly bent projection 234 on the second overlap section 224.

[0037] Element 230 is described here as a single unit, but the person skilled in the art will understand that the various parts that form element 230, for example the flange part and the overlap parts, can be manufactured as separate parts. These parts can then be combined into a single unit that is vulcanized onto the sleeve part 220, or they can be vulcanized as separate parts.

[0038] Fig. Figure 3a schematically shows a view in the axial direction of a connecting piece 300 for connecting two pipe sections according to a further non-inventive example, Fig. 3b an axial sectional view A-A of the connecting piece 300 in Fig. 3a.

[0039] The connecting part 300 according to the in Fig. The example shown in 3a-b differs from the connecting part 100 according to the one in Fig. The example shown in 1a-b includes the fact that a sleeve part 320 is arranged substantially inside the pipe sections 10, 20 in the assembled state, while a flange part 310 is arranged outside the sleeve part 320 in the assembled state.

[0040] The flange part 310 is thus mounted at a distance between the end faces 12, 22 of the pipe sections 10, 20 when assembled. The flange part 310 is arranged circumferentially around the sleeve part 320. Viewed in the axial direction of the sleeve part 320, the flange part 310 is arranged essentially centrally. The flange part 310 has a first side 312, which is intended to face the first pipe section 10 when assembled, and an opposing second side 314, which is intended to face the second pipe section 20 when assembled.

[0041] The sleeve part 320 is located essentially inside the pipe sections 10 and 20 when assembled, and the flange part 310 is located essentially outside the sleeve part 320 when assembled. The flange part 310 is accordingly arranged such that it extends radially outwards from the sleeve part 320, so that in the assembled state it lies between the end faces 12 and 22 of the pipe sections 10 and 20.

[0042] The sleeve part 320 has a first overlapping section 322, which is arranged between the edge of the sleeve part 320, which opens towards the first pipe section 10 in the assembled state, and the first side 312 of the flange part 310, and a second overlapping section 324 between the edge of the sleeve part 320, which opens towards the second pipe section 20 in the assembled state, and the second side 314 of the flange part 310. The first overlapping section 322 is arranged such that it overlaps the end section of the first pipe section 10 on the inside. The second overlapping section 324 is arranged such that it overlaps an end section of the second pipe section 20 on the inside.

[0043] According to the example in Fig. 1a to 1b, the flange part 310 further comprises bendable areas 332, 334, with respect to which the end faces 12, 22 are arranged such that they interact with them. The bendable areas 332, 334 have a first damping element 332 arranged on the first side 312 of the flange part 310 and a second damping element 334 arranged on the second side 314 of the flange part 310. The first damping element 332 is arranged in a first circumferential recess 312a on the first side 312 and the second damping element 334 is arranged in a second circumferential recess 314a on the second side 314 of the flange part 310. According to one embodiment, the first and the second damping elements 332, 334 are formed from sealing rings in the form of O-rings. The first damping element 332 is arranged in such a way that it is flexible and dampingly interacts with the end surface 12 of the first pipe section 10.The second damping element 334 is arranged in such a way that it is flexible and dampingly interacts with the end surface 22 of the second tube section 20.

[0044] According to the example in Fig. 1b The connecting piece 300 further comprises sealing elements 342, 344, which are arranged such that they interact sealingly with the pipe sections 10, 20. The sealing elements 342, 344 have O-ring elements 342, 344 in the sleeve part 320. The sealing elements 342, 344 have a first O-ring element 342, which is arranged such that it interacts sealingly with the first pipe section 10 in the assembled state, and a second O-ring element 334, which is arranged such that it interacts sealingly with the second pipe section 20.

[0045] The first O-ring element 342 is arranged in an inner recess 322a in the first overlapping part 322 of the sleeve part 320. The second O-ring element 344 is arranged in an inner recess 342a in the second overlapping part 324 of the sleeve part 320.

[0046] Fig. Figure 4a schematically shows a view in the axial direction of a connecting piece 400 for connecting two pipe sections according to an embodiment of the present invention. Fig. 4b an axial sectional view AA of the connecting piece 400 in Fig. 4a.

[0047] The connecting piece 400 according to the in Fig. The embodiment shown in 4a to 4b differs from the connecting piece 200 according to the example in Fig. 2a-2b in that a sleeve part 420 is arranged substantially inside the pipe regions 10, 20 when assembled, while a flange part 410 is arranged outside the sleeve part 420 when assembled.

[0048] The connecting piece 400 according to the embodiment has, like the connecting piece 200 of the example, an element 430 mounted by means of vulcanization. The element 430 is thus mounted on the outside of the sleeve part 420 of the connecting piece 400. The element 430 is preferably made of an elastic material such as rubber. According to one embodiment, the element 430 is made of fluororubber.

[0049] According to this embodiment, the element 430 has the flange part 410, with respect to which the respective end faces 12, 22 of the pipe sections 10, 20 are arranged in the assembled state such that they interact with it. The flange part 410 has a first side 412, which is intended to face the first pipe section 10 in the assembled state, and an opposing second side 414, which is intended to face the second pipe section 20 in the assembled state. The flange part 410 is arranged substantially centrally in the axial direction of the sleeve part 420. The flange part 410 is arranged circumferentially around the sleeve part 420. In the assembled state, the flange part 410 is positioned at a distance between the end faces 12, 22.

[0050] Element 430 is configured to be bendable. Since the flange part 410 forms part of element 430, the flange part 410 is also formed from bendable areas 412, 414, with respect to which the end faces 12, 22 are arranged in the assembled state such that they interact with them. The flange part 410 is thus configured to be bendable, such that the first side 412 of the flange part 410 interacts in a bendable and damping manner with the first pipe section 10, and the second side 414 of the flange part 410 interacts in a bendable and damping manner with the second pipe section 20.

[0051] The sleeve part 420 also has a first 422 and a second 424 overlap section. The first overlap section 422 is arranged between the end of the sleeve part, which opens towards the first pipe section 10 in the assembled state, and the first side 412 of the flange part 410. The second overlap section 424 is arranged between the end of the sleeve part 420, which opens towards the second pipe section 20 in the assembled state, and the second side 414 of the flange part 410.

[0052] Element 430 has sealing elements 432, 434. The sealing elements 432, 434 in turn have a first sealing element 432, which is arranged so that it seals against the first pipe section 10 in the assembled state, and a second sealing element 434, which in the assembled state is arranged so that it seals against the second pipe section 20.

[0053] The first sealing element 432 is arranged externally around the sleeve part 420 as part of the element 430. The second sealing element 434 is also arranged externally around the sleeve part 420 as part of the element 430. The first sealing element 432 is arranged such that, in the assembled state, it seals against the first pipe section 10. The second sealing element 434 is arranged such that, in the assembled state, it seals against the second pipe section 20. The first sealing element 432 consists of a circumferentially outwardly curved projection 432 in the area of ​​the first overlap section 422. The second sealing element 434 consists of a circumferentially outwardly curved projection 434 in the area of ​​the second overlap section 424.

[0054] Element 430 is described here as a single unit, but the person skilled in the art will understand that the various parts that make up element 430, for example the flange part and the overlap parts, can be manufactured as separate parts. These parts can then be combined into a single unit that is vulcanized onto the sleeve part 420, or they can be vulcanized as separate parts.

[0055] Fig. Figure 5 schematically shows an axial sectional view of a connecting piece 500 for connecting two pipe sections 10, 20 according to a further non-inventive example.

[0056] The connecting piece 500 according to the one in Fig. The example shown in Figure 5 differs from the connecting piece 100 according to the one in Figure 5. Fig. Example 1a to 1b shown and the connecting piece according to the one in Fig. The example shown in 3a to b is characterized in that a first part of a sleeve part 520 is arranged substantially inside the first pipe section 10 in the assembled state, and a second part of the sleeve part 520 is arranged substantially outside the second pipe section 20 in the assembled state. A first outer flange part 510a is arranged on the outside of the sleeve part 520, and a second inner flange part 510b is arranged inside the sleeve part 520.

[0057] The flange parts 510a, b are thus mounted at a distance between the end faces 12, 22 of the pipe sections 10, 20 when assembled. The outer flange part 510a is arranged circumferentially around the sleeve part 520 on the outside. The inner flange part 510b is arranged circumferentially around the sleeve part 520 on the inside. The flange parts 510a, b are arranged substantially centrally in the axial direction of the sleeve part 520. The flange part 510a has a first side 512 which is intended to face the first pipe section 10 when assembled. The second flange part 510b has a second side 514 which is intended to face the second pipe section 20 when assembled.

[0058] The sleeve part 520 has a first overlapping section 522 located between the edge of the sleeve part 520, which opens towards the first pipe section 10 in the assembled state, and the first side 512 of the flange part 510, and a second overlapping section 524 located between the edge of the sleeve part, which opens towards the second pipe section 20 in the assembled state, and the second side 514 of the flange part 510b. The first overlapping section 522 is arranged such that, in the assembled state, it overlaps an end section of the first pipe section 10 on the inside. The second overlapping section 524 is arranged such that, in the assembled state, it overlaps an end section of the pipe section 20 on the outside.

[0059] According to the example in Fig. 1a-b and the example in Fig. 3a-3b, the flange parts 510a, b further comprise bendable areas 532, 534, with respect to which the end faces 12, 22 are arranged such that they interact with them. The bendable areas 532, 534 comprise a first damping element 532 arranged on the first side 512 of the first flange part 510a and a second damping element 534 arranged on the second side 514 of the second flange part 510b. The first damping element 532 is arranged in a first circumferential recess 512a on the first side 512 and the second damping element 534 is arranged in a second circumferential recess 514a on the second side 514 of the flange parts 510a, b. According to one variant, the first and second damping elements 532, 534 are formed from sealing rings in the form of O-rings. The first damping element 532 is arranged such that, in the assembled state, it is flexible and dampingly interacts with the end surface 12 of the first pipe section 10.The second damping element 524 is arranged such that, in the assembled state, it is flexible and dampingly interacts with the end surface 22 of the second tube section 20.

[0060] According to the example in Fig. 1a, b and the example in Fig. 3a, Fig. 3b The connecting piece 500 further comprises sealing elements 542, 544, which are arranged such that they interact sealingly with the pipe sections 10, 20 in the assembled state. The sealing elements 542, 544 have O-ring elements 542, 544 in the sleeve part 520. The sealing elements 542, 544 have a first O-ring element 542, which is arranged such that it interacts sealingly with the first pipe section 10 in the assembled state, and a second O-ring element 544, which is arranged such that it interacts sealingly with the second pipe section 20 in the assembled state.

[0061] The first O-ring element 542 is arranged in an outer recess 522a in the first overlapping section 522 of the sleeve part 520. The second O-ring element 544 is arranged in an inner recess 542a in the second overlapping section 524 of the sleeve part 520.

[0062] Fig. Figure 6 schematically shows an axial sectional view of a connecting piece 600 for connecting two pipe sections 10, 20 according to another non-inventive example.

[0063] The connecting piece 600 according to the in Fig. The example shown in Figure 6 differs from the connecting piece 200 according to the one in Figure 6. Fig. 2a to 2b example and the connecting piece 400 according to the in Fig. In the embodiment shown in Figure 4, a first part of a sleeve part 620 is arranged substantially inside the first pipe section 10 in the assembled state, and a second part of the sleeve part 620 is arranged substantially outside around the second pipe section 20 in the assembled state. A first outer flange part 610a is arranged outside around the sleeve part 620, and a second inner flange part 610 is arranged inside the sleeve part 620.

[0064] The connecting piece 600 according to the example, like the connecting piece 200 and the connecting piece 400 according to the embodiment, has elements 630a, b which are assembled by means of vulcanization. The elements 630a, b are preferably made of an elastic material, such as rubber. According to one embodiment, the elements 630a, b are made of fluororubber.

[0065] The flange parts 610a, b are thus mounted at a distance between the end faces 12, 22 of the pipe sections 10, 20 in the assembled state. The outer flange part 610a is arranged circumferentially around the sleeve part 620 on the outside. The flange part 610b is arranged circumferentially around the sleeve part 620 on the inside. The flange parts 610a, b are arranged substantially centrally in the axial direction of the sleeve part 620. The first flange part 610a has a first side 612 which is intended to face the first pipe section 10 in the assembled state, and the second flange part 610b has an opposite second side 614 which is intended to face the second pipe section 20 in the assembled state.

[0066] The sleeve part 620 also has a first overlap section 622 and a second overlap section 624. The first overlap section 622 is arranged between the end of the sleeve part 620, which opens towards the first pipe section 10 in the assembled state, and the first side 612 of the first flange part 610a. The second overlap section 624 is arranged between the edge of the sleeve part 620, which opens towards the second pipe section 20 in the assembled state, and the second side 614 of the second flange part 610b. The first overlap section 622 is arranged such that, in the assembled state, it overlaps an end section of the first pipe section 10 on the inside. The second overlap section 624 is arranged such that, in the assembled state, it overlaps an end section of the second pipe section 20 on the outside.

[0067] Element 630 comprises a first element 630a mounted externally on the first overlap section 622 and a second element 630b mounted internally on the second overlap section 624 of the sleeve section 620. The first element 630a is further mounted on the first flange section 610a and thus forms the first side 612 of the first flange section 610a. The second element 630b is further mounted on the second flange section 610b and thus forms the second side 614 of the second flange section 610b.

[0068] Elements 630a and b are configured to be bendable. Since the first side 612 is contained in the first element 630a and the second side 614 is contained in the second element 630b, the flange parts 610a and b have bendable areas 612 and 614, with respect to which the end faces 12 and 22 are arranged to interact with them. The flange parts 610a and b are thus configured to be bendable, such that the first side 612 of the first flange part 610a, in the assembled state, interacts in a bendable and damping manner with the first pipe section 10, and the second side 614 of the second flange part 610b, in the assembled state, interacts in a bendable and damping manner with the second pipe section 20.

[0069] The elements 630a, b thus have the sealing elements 632, 634. The sealing element 632 therefore forms part of the first element 630a and the sealing element 634 forms part of the second element 630a. The sealing elements 632, 634 have a first sealing element 632, which is arranged such that, in the assembled state, it seals against the first pipe section 10, and a second sealing element 634, which is arranged such that, in the assembled state, it seals against the second pipe section 20.

[0070] The first sealing element 632 is arranged externally around the sleeve part 620 as part of the first element 630a. The second sealing element 634 is arranged internally around the sleeve part 620 as part of the element 630b. The first sealing element 632 is arranged such that, in the assembled state, it seals against the first pipe section 10. The second sealing element 634 is arranged such that, in the assembled state, it seals against the second pipe section 20. The first sealing element 632 consists of a circumferentially outwardly curved projection 632 on the first element 630a, and the second sealing element 634 consists of a circumferentially inwardly curved projection 634 on the second element 630b.

[0071] The connecting pieces 500; 600 according to the examples in Fig. 5 and Fig.6 facilitate the connection of pipe sections 10, 20 with different diameters without affecting the geometries of the end sections of the corresponding pipe sections 10, 20.

[0072] The flange part 110; 210; 310; 410; 510a, b; 610a, b according to the examples and embodiments described above is arranged such that, during its assembly, it axially guides the connecting piece 100; 200; 300; 400; 500; 600 in such a way that the corresponding end surfaces 12, 22 of the first and second pipe sections 10, 20 are arranged to interact with the flange part 110; 210; 310; 410; 510; 610. When the connecting piece is arranged between the pipe sections 10, 20, their corresponding end surfaces 12, 22 come into interaction with the flange part 110; 210; 310; 410; 510a, b; 610a, b, which creates axial guidance for the pipe sections 10, 20. Accordingly, there is no need to adapt the end parts 12, 22 of the pipe sections 10, 20.The flange part 110; 210; 310; 410; 510a, b; 610a, b can also be designed with flexible areas in the form of sealing elements 132; 134; 232; 234; 332; 334; 442; 444; 532; 534; 632; 634 which can absorb forces caused by the mutual movement between the pipe areas 10, 20 and reduce wear on their corresponding end surfaces 12, 22.

[0073] The connecting piece 100; 200; 300; 400; 500; 600, according to the examples and embodiments described above, can be used to connect any suitable pipe sections in any suitable application. The connecting pieces are applicable, for example, to connecting pipe sections in EGR circuits in vehicles, cooling circuits, air circuits, or equivalents. According to one embodiment, the sleeve part 120; 220; 320; 420; 530; 630 is made of a metallic material.

[0074] The foregoing description of the preferred embodiments of the present invention is given for illustrative and descriptive purposes. It is neither intended to be exhaustive nor to limit the invention to the described variants. Many modifications and variations will be apparent to those skilled in the art. The embodiments were selected and described to best explain the principles of the invention and its practical applications, and thereby to enable those skilled in the art to understand the invention with regard to its various embodiments and with the various modifications applicable to its intended use.

Claims

[1] Connecting piece (400) for connecting two pipe sections (10, 20) which are sealable against each other and have end faces (12, 22), wherein an element (430) has a flange part (410) with respect to which the corresponding end faces (12, 22) of the pipe sections (10, 20) can be arranged such that they interact with it, and sealing elements (432, 434) which are arranged such that they interact sealingly with the pipe sections (10, 20) in the assembled state, wherein the sealing elements (432, 434) form part of the element (420), characterized by , that the connecting piece (400) further comprises a sleeve part (420) which is connected to the flange part (410) which is arranged such that it seals against the pipe sections (10, 20) in the assembled state, wherein the sleeve part (420) is arranged substantially inside the pipe sections (10, 20) in the assembled state and wherein the flange part (410) is arranged on the outside of the sleeve part (420). [2] Connecting piece according to claim 1, wherein the flange part (410) is arranged at a distance between the end faces (12, 22) in the assembled state. [3] Connecting piece according to claim 1 or 2, wherein the flange part (410) is arranged substantially centrally in the axial direction of the sleeve part (420). [4] Connecting piece according to one of claims 1-3, wherein the flange part (410) is arranged circumferentially on the sleeve part (420). [5] Connecting piece according to one of claims 1-4, wherein the flange part (410) has bendable areas (412, 414) with respect to which the end faces (12, 22) can be arranged in such a way that they interact with them. [6] Connecting piece according to claim 1, wherein the sealing elements (432, 434) comprise elements (432, 434) mounted on the sleeve part (420) by means of vulcanization.

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