• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a connection in a pipeline. The connection comprises a first connecting portion (1a) of a first pipe (1), a second connecting portion (2a) of a second pipe (2) which is connectable to the first connecting portion (1a), a wear non-woven area (A) which allows a certain mutual mobility between the connecting portions ( 1a, 2a) when in the connected state, a sealing area (B) which prevents leakage between the connecting portions (1a, 2a) when in the connected state and a central shaft (11) extending centrally through the bushing. The wear area (A) is located at a radial distance (rA) from the central axis (11) which differs from the radial distance (rB) of the sealing area (B) to the central axis (11). This substantially eliminates the risk of the wear area (A) coming into contact with the tent area (B) and causing damage to it at times when the pipes (1, 2) in the connection are dismantled. (Fig- 1)
    公开号:SE535753C2
    申请号:SE1150640
    申请日:2011-07-07
    公开日:2012-12-04
    发明作者:Joakim Boman
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    35 535 753 consumption of pipes and seals. The cost of dismantling pipes with wear surfaces in an exhaust pipe thus becomes relatively large.
    SUMMARY OF THE INVENTION The object of the present invention is to provide a connection of the kind mentioned in the introduction where it is possible to disassemble and reassemble the constituent components without there being any obvious risk of leakage in the reconnected connection.
    These objects are achieved with the device of the kind mentioned in the introduction, which is characterized by the features stated in the characterizing part of claim 1.
    The connection is provided with a wear area which enables mutual movements between the connecting parts of the pipes. This mobility essentially prevents thermal stresses from occurring in the connection between the connecting pipes when they are exposed to temperature variations. The surfaces of the wear area become more or less rough over time.
    To establish a tight connection between the pipes in the connection, it is provided with a sealing area. In order to obtain a good seal between the surfaces of the sealing area, it is of great importance that the sealing surfaces are undamaged. According to the invention, the wear groove area is located at a radial distance from a central axis through the connection which differs from the radial distance of the sealing area to the central axis. When pipes of the type mentioned in the introduction are dismantled, they are displaced in a substantially axial direction relative to each other. Since the wear area and the sealing area are located at different radial distances from the central axis, they do not come into contact with each other during the disassembly work. The risk that the wear area of rough surfaces damages the surfaces of the sealing area during the disassembly work and in a subsequent reassembly is thus substantially completely eliminated. It is thus possible to disassemble and reassemble the components in the connection without there being any obvious risk of leakage in the reassembled connection. The pipes advantageously have a round cross-sectional shape, but they can have a substantially arbitrary but functional shape. The term pipe is to be interpreted here in a broader sense. The connection can be established between two components, each of which is provided with a tubular portion in the area where the connection is established.
    According to an embodiment of the present invention, the wear area is located at a greater radial distance from the central axis than the radial distance of the sealing area from the central axis. Alternatively, the wear area is located at a smaller radial distance fm, the central axis than the radial distance of the sealing area from the central axis. One of the above-mentioned alternatives is selected depending on the mutual position of the wear area and the sealing area in the connecting ring.
    According to another preferred embodiment of the present invention, the wear area is formed by a first wear surface of the first connecting panel and a second wearing surface of the second connecting portion which are adapted to be in contact with each other when the connecting portions are in the connected condition. The wear surfaces are shaped so that mobility is allowed between the connecting panels when they are subjected to thermal loads.
    The first wear surface and the second wear surface are advantageously designed so that they enable a certain mutual movement between the pipes in an axial direction when the connecting portions are in a connected condition. Thus, changes in length of the pipes can be accommodated in the connection.
    According to another preferred embodiment of the present invention, the first wear surface is a radially inwardly directed surface and the second wear surface is a radially outwardly directed surface. The first connecting portion here forms a radially outer portion of the connection enclosing the second connecting portion. The wear surfaces here constitute cylindrical surfaces with an axial stretch which defines a maximum displacement movement between the pipes in the connection.
    According to another preferred embodiment of the present invention, the sealing area is formed by a sealing surface of the first connecting portion and a sealing member arranged on the second connecting portion, the sealing surface and the sealing member being adapted to be in contact with each other when the connecting portions are in the connected condition. The sealing member advantageously abuts a resilient collar fi against the sealing surface of the first connecting portion. In order for the sealing area to be able to create a tight connection between the pipes in the connection, neither the sealing member nor the sealing surface must contain scratches or other types of surface damage. The sealing surface may be a radially inwardly directed surface and that the sealing means may have a radially outwardly directed surface which is adapted to be in contact with the sealing surface when the connecting portions are in the connected state. The radially outer surfaces of the sealing member abut here with a resilient force against sealing surfaces of the first connecting portion. According to another preferred embodiment of the present invention, the sealing means is a sealing ring of a metal material. When the pipes lead a gaseous or liquid medium which has a high temperature, the sealing means must be made of a heat-resistant material. In this case, it is suitable to design the sealing member of a metal material with suitable properties. The connection advantageously constitutes a connection between two pipes in an exhaust line. Pipes in exhaust pipes are exposed to great tennis stress. The pipes here are usually designed with wear surfaces to enable mutual movements between the pipes. Typical such pipes are exhaust manifolds and turbo manifolds.
    BRIEF DESCRIPTION OF THE DRAWINGS In the following, exemplary embodiments of the invention are described by way of example with reference to the accompanying drawings, in which: Fig. 1 shows a connection in an exhaust line according to a first embodiment of the invention, Fig. 2 shows the connection in Fig. 1 in more detail, Fig. 3 shows a connection in an exhaust line according to a second embodiment of the invention and Fig. 4 shows the connection in Fig. 3 in more detail.
    DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION Figs. 1 and 2 show a connection between a first pipe 1 and a second pipe 2 in an exhaust line which discharges exhaust gases from an internal combustion engine. The first pipe 1 can be an exhaust manifold and the second pipe 2 can be a turbo manifold.
    Internal combustion engine can be a diesel engine. The first tube 1 comprises an outer connecting portion 1a which is pushed onto an inner connecting portion 2a of the second tube 2 to a connected state. The first tube 1 has a stationary fastening by means of a number of fastening means 3 which can be bolts. The second tube 2 has a stationary attachment by means of a number of fisting means 4 which can also be bolts. During operation of the internal combustion engine, pipes 1, 2 in the exhaust line are exposed to exhaust gases with varying temperatures. The exhaust gases in a diesel engine can have a temperature of up to about 600-700 ° C. To prevent the pipes from being formed by the thermal load produced by the exhaust gases, the connecting portion 1a of the first pipe is formed with an internal wear surface 5. The connecting portion 2a of the second pipe is formed with an external wear surface 6 which is adapted to be in contact with the wear surface 5 of the first pipe when the pipes 1, 2 are in a connected condition. The two wear surfaces 5, 6 ensure that the first pipe 1 and the second pipe 2 can obtain longitudinal changes and be displaced in an axial direction in relation to each other when the temperature of the exhaust gases in the exhaust line varies. The wear surfaces 5, 6 of the pipes are initially smooth, but they inevitably receive wear after a period of use. The wear surfaces 5, 6 can thus become uneven and rough after a period of use.
    The connecting portion 2a of the second tube comprises an end surface 2b and a radially outwardly directed support surface 7 which is adapted to receive and support an annular sealing member 8. In this embodiment the wear surface 6 of the second tube is located at a longer distance from the end surface 2a than the support surface 7 to the end surface 2a. The second pipe connecting portion Za also comprises a radial stop surface 9 which defines an intended mounting position for the sealing member 8 on the support surface 7. The sealing member 8 is made of a material which can withstand the high temperatures present in the exhaust line. The sealing member 8 may be made of a suitable metal material. The connecting portion 1a of the first pipe comprises an end surface 1b and a radially inwardly directed sealing surface 10 which is adapted to come into contact with the sealing member 8 when the pipes 1, 2 are in a connected condition. The sealing surface 10 of the first tube is located at a longer distance from the end surface 1b of the first tube than the distance of the wear surface 5 to the end surface 1b. The wear surface 5 of the first tube and the wear surface 6 of the second tube form a wear area A between the tubes 1, 2 when they are in a connected state. The wear surface 5 of the first tube, the wear surface 6 of the second tube and the wear area A are located at a radial distance rA from a central axis 11 in the connection. The sealing surface 10 of the first pipe and the sealing member 8 form a sealing area B between the pipes 1, 2. The sealing surface 10 of the first pipe, the sealing member 8 and the sealing area B are located at a radial distance rg from the central axis 11 in the connection. The wear area A is in this embodiment located at a greater radial distance rA from the central axis 11 than the radial distance rg of the sealing area B from the central axis 1 1.
    The object of the present invention is to prevent the wear surfaces 5, 6 from causing scratches or other damage to the sealing member 8 or the sealing surface 10 when the pipes are dismantled and reassembled. On occasions when the first pipe 1 and the second pipe 2 are disassembled, the connecting means 3, 4 of at least one of the pipes 1, 2 are released. The first pipe 1 and the second pipe 2 are then displaced in an axial direction from each other. In order to prevent damage to the sealing member 8, it must not come into contact with the wear surface 5 of the first pipe during the disassembly work. To prevent damage to the sealing surface 10 of the first pipe, it must not come into contact with the wear surface 6 of the second pipe during the disassembly work. Since the sealing surface 10 of the first pipe and the wear surface 6 of the second pipe in this embodiment are arranged so that they do not have to pass each other when the pipes 1, 2 are disassembled and reassembled, there is no risk of the sealing surface 10 being damaged by the second pipe wear surface 6. the wear surface 5 of the first pipe to pass past the sealing member 8 when the pipes 1, 2 are disassembled and reassembled. In order to prevent the wear surface 5 of the first tube from coming into contact with the sealing member 8, in this case the wear surface 5 of the first tube is arranged at a greater radial distance rA from the central axis 11 than the sealing member 8 radial distances rg to the central axis 11. 1, 2 is disassembled and reassembled, in this case the wear surface 5 of the first pipe passes at a distance from the sealing member 8 as they are denoted by the difference between said radial distances rA, rg. The risk that the wear surface 5 of the first pipe 5 damages or scratches the sealing member 8 when the pipes are dismantled and reassembled is thus substantially eliminated.
    Figs. 3 and 4 show an alternative connection between a first pipe 1 and a second pipe 2.
    The first pipe 1 also in this case comprises an inwardly directed wear surface 5 which is adapted to come into contact with an outwardly directed wear surface 6 of the second pipe 2 when the pipes 1, 2 are in a connected condition. The second tube 2 comprises a radially outwardly directed support surface 7 which receives and carries an annular sealing member 8. The second tube 2 comprises a radial stop surface 9 which defines an intended mounting position for the sealing member 8 on the support surface 7. When the tubes 1, 2 are in a connected state, the wear surface 5 of the first tube and the wear surface 6 of the second tube form a wear area A which is located at a radial distance rA from a central axis 11 in the connection. The sealing surface 10 of the first tube and the sealing member 8 form a sealing area B which is located at a radial distance rg from the central axis 11 of the dry bond. The wear area A is in this embodiment located at a smaller radial distance rA from the central axis 11 than the radial distance rB of the sealing area B from the central axis 1 1.
    At times when the first pipe 1 and the second pipe 2 are disassembled, the connecting means 3, 4 of at least one of the pipes 1, 2 are released. The first pipe 1 and the second pipe 2 are displaced therein in an axial direction from each other. The purpose of the invention is thus to prevent the formation of scratches or other types of damage to the sealing member 8 or the sealing surface 10 when the pipes are dismantled and reassembled. In order to achieve this, the wear surface 5 of the first pipe must not come into contact with and the sealing member 8 when the pipes are dismantled. The wear surface 6 of the second pipe must also not come into contact with the sealing surface 10 of the first pipe. that the sealing member 8 is damaged by the wear surface 5 of the first pipe. To prevent the wear surface 6 of the second tube from coming into contact with the sealing surface 10 of the first tube, the wear surface 6 of the second tube is arranged at a less radial distance rA from the central axis 11 than the radial distance rg of the first tube sealing surface 10 to the central axis 11 When the tubes 1, 2 are disassembled and reassembled, in this case the sealing surface 10 of the first tube passes at a distance from the wear surface 6 of the second tube as they are fi driven by the difference between the radial distances rA, rg. The risk that the wear surface 6 of the second pipe scratches or otherwise damages the sealing surface 10 of the first pipe is thus substantially eliminated.
    The invention is in no way limited to the embodiment described above, but can be varied freely within the scope of the claims. In alternative embodiments, the invention can also be used in connection with other lines that are part of an exhaust system for an internal combustion engine, as well as in arbitrary pipelines where corresponding problems arise.
    权利要求:
    Claims (8)
    [1]
    A connection in a pipeline, wherein the connection comprises a first connecting portion (1a) of a first pipe (1), a second connecting portion (2a) of a second pipe (2) which is connectable to the first connecting portion (1a), a wear area (A) which enables a certain mutual movement between the connecting portions (1a, 2a) when they are in a connected state, a sealing area (B) which prevents leakage between the connecting portions (1a, 2a) when they are in the connected state and a central shaft (1 1) extending centrally through the connection, the sealing area (B) being formed by a radially inwardly directed sealing surface (10) of the first connecting portion (1a) and a sealing member (8) arranged on a radially outwardly directed support surface (7) of the second connecting portion (2a), and that the sealing member (8) has a radially outwardly directed surface which is adapted to be in contact with the sealing surface (10) in the sealing area (B) when the connecting portions (1a, 2a) are in it fö bound condition, characterized in that the wear area (A) is located at a radial distance (rA) from the central axis (1 1) which differs from the radial distance (rg) of the sealing area (B) to the central axis (11).
    [2]
    Connection according to claim 1, characterized in that the wear area (A) is located at a greater radial distance (rA) from the central axis (1 1) than the radial distance (rg) of the sealing area (B) from the central axis (1 1) .
    [3]
    Connection according to claim 1, characterized in that the wear area (A) is located at a smaller radial distance (rA) from the central axis (1 l) than the radial distance (rg) of the sealing area (B) from the central axis (1 1) .
    [4]
    Joint according to one of the preceding claims, characterized in that the wear area (A) is formed by a first wear surface (5) of the first connecting portion (1a) and a second wear surface (6) of the second connecting portion (2a) which are adapted to be in contact with each other when the connecting portions (1a, 2a) are in the connected state.
    [5]
    Connection according to claim 4, characterized in that the first wear surface (5) and the second wear surface (6) are designed so that they enable a certain mutual movement between the pipes (1, 2) in an axial direction when the connecting portions (1a, 2a ) years in a federated state. 10 15 535 753
    [6]
    Connection according to Claim 4 or 5, characterized in that the first wear surface (5) is a radially inwardly directed surface and the second wear surface (6) is a radially outwardly directed surface.
    [7]
    Connection according to one of the preceding claims, characterized in that the sealing member (8) is a sealing ring of a metal material.
    [8]
    Connection according to one of the preceding claims, characterized in that the pre-connection comprises a dry connection between two pipes (1, 2) in an exhaust line.
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    同族专利:
    公开号 | 公开日
    EP2729681B1|2018-11-28|
    EP2729681A1|2014-05-14|
    EP2729681A4|2015-03-04|
    CN103649485B|2016-08-17|
    SE1150640A1|2012-12-04|
    WO2013006132A1|2013-01-10|
    BR112013032531A2|2017-03-01|
    CN103649485A|2014-03-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2449753A1|1974-10-19|1976-04-29|Motoren Turbinen Union|CONNECTOR|
    GB2000240B|1977-06-10|1982-06-23|Thyssen Industrie|Socketed pipe portion|
    DE4028225C1|1990-09-06|1991-10-02|Mtu Friedrichshafen Gmbh|Joint for vehicle exhaust - has soft seal between two radial ring surfaces on pipes|
    CN2104984U|1991-11-14|1992-05-20|马树功|Two-way extension joint of pipeline|
    US5784881A|1996-01-11|1998-07-28|Hitachi Metals, Ltd.|Multi-part exhaust manifold assembly with welded connections|
    DE19646883B4|1996-11-13|2006-06-22|Man Nutzfahrzeuge Ag|Abgaskrümmerstoßverbindung|
    JP2945374B1|1998-04-08|1999-09-06|石川ガスケット株式会社|Gasket for pipe joint|
    US7837233B2|2005-08-26|2010-11-23|Cummins Inc.|Exhaust system slip joint|
    US8844976B2|2007-06-13|2014-09-30|ACC La Jonchére|Seal assembly including a multilayered sliding member|WO2017030547A1|2015-08-17|2017-02-23|Cummins Inc.|Lobed exhaust manifold slip joint|
    CN107762602B|2016-08-23|2020-04-10|上海汽车集团股份有限公司|Automobile exhaust pipe connecting device|
    法律状态:
    2021-03-02| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1150640A|SE1150640A1|2011-07-07|2011-07-07|Connection between two pipes in a pipeline|SE1150640A| SE1150640A1|2011-07-07|2011-07-07|Connection between two pipes in a pipeline|
    PCT/SE2012/050758| WO2013006132A1|2011-07-07|2012-07-02|Connection between two pipes in a pipeline|
    EP12807298.0A| EP2729681B1|2011-07-07|2012-07-02|Connection between two pipes in a pipeline|
    BR112013032531A| BR112013032531A2|2011-07-07|2012-07-02|connection between two pipes in one pipe|
    CN201280033782.8A| CN103649485B|2011-07-07|2012-07-02|The connector between two pipelines in pipeline|
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