CN110005513B - Joint structure of pipe - Google Patents

Joint structure of pipe Download PDF

Info

Publication number
CN110005513B
CN110005513B CN201811492904.5A CN201811492904A CN110005513B CN 110005513 B CN110005513 B CN 110005513B CN 201811492904 A CN201811492904 A CN 201811492904A CN 110005513 B CN110005513 B CN 110005513B
Authority
CN
China
Prior art keywords
flange
pipe
sleeve
opening
cylindrical portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811492904.5A
Other languages
Chinese (zh)
Other versions
CN110005513A (en
Inventor
石川嘉信
伊藤聪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Futaba Industrial Co Ltd
Original Assignee
Futaba Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Futaba Industrial Co Ltd filed Critical Futaba Industrial Co Ltd
Publication of CN110005513A publication Critical patent/CN110005513A/en
Application granted granted Critical
Publication of CN110005513B publication Critical patent/CN110005513B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1827—Sealings specially adapted for exhaust systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/11—Manufacture or assembly of EGR systems; Materials or coatings specially adapted for EGR systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/12—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems characterised by means for attaching parts of an EGR system to each other or to engine parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
    • F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
    • F16L23/026—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
    • F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
    • F16L23/028—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes the flanges being held against a shoulder
    • F16L23/0286—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes the flanges being held against a shoulder the shoulder not being formed from the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/16—Flanged joints characterised by the sealing means
    • F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings

Abstract

The present disclosure provides a joint structure of pipes capable of suppressing corrosion of flanges caused by exhaust gas and reducing the cost of the joint structure. One aspect of the present disclosure relates to a joint structure for installing a pipe. The engagement structure has a flange and a sleeve. The flanges are configured to be fastened to each other with the flanges on the other side by sandwiching the gasket therebetween, and the flanges have an opening and a central region. The conduit may be inserted through the opening. The central region extends from the opening to a radially outer side of the flange, and is recessed in a thickness direction of the flange. The sleeve is made of a metal having higher corrosion resistance than the metal constituting the flange, and has a cylindrical portion and an annular portion. The cylindrical portion has a shape covering the entire circumference of the outer peripheral surface of the pipe, and the cylindrical portion can be engaged with the entire circumference of the outer peripheral surface of the pipe at the 1 st end portion thereof. The annular portion is continuous with the 2 nd end portion of the cylindrical portion and extends radially outward of the sleeve at least from the opening portion of the gasket, and the annular portion is joined to the flange at a central region.

Description

Joint structure of pipe
Technical Field
The present disclosure relates to a joining structure of pipes.
Background
The pipe constituting the flow path of the exhaust gas discharged from the internal combustion engine of the vehicle is made of a metal having high corrosion resistance, such as stainless steel. Further, the pipe is connected to another pipe by a joint structure having a flange (see japanese patent laid-open No. 2009-250338).
Disclosure of Invention
In the joint structure, if the flanges are made of iron or steel as described in the above-mentioned publication, there is a possibility that the flanges are corroded by exhaust gas leaking from the gaps at the connecting portions of the pipes. However, if the machining is performed to eliminate the gap at the connection portion of the pipes, the productivity is significantly reduced.
On the other hand, if the flange is made of stainless steel, corrosion can be suppressed, but since the flange is required to have a certain thickness, the use of stainless steel for the flange causes a significant increase in the material cost of the joint structure.
An aspect of the present disclosure preferably provides a joint structure of pipes capable of suppressing corrosion of flanges caused by exhaust gas and at the same time reducing the cost of the joint structure.
One aspect of the present disclosure relates to a joint structure of a pipe for mounting a pipe constituting a flow path of exhaust gas discharged from an internal combustion engine. The engagement structure has a flange and a sleeve. The flanges are configured to be fastened to each other with the flanges on the other side by sandwiching the gasket therebetween, and the flanges have an opening and a central region. The conduit may be inserted through the opening. The central region extends from the opening to a radially outer side of the flange, and is recessed in a thickness direction of the flange. The sleeve is made of a metal having higher corrosion resistance than a metal constituting the flange, and has a cylindrical portion and an annular portion. The cylindrical portion has a shape covering the entire circumference of the outer peripheral surface of the pipe, and the cylindrical portion is engageable with the entire circumference of the outer peripheral surface of the pipe at the 1 st end portion thereof. The annular portion is continuous with the 2 nd end portion of the cylindrical portion and extends radially outward of the sleeve at least from the opening portion of the gasket, and the annular portion is joined to the flange at a central region.
According to the above configuration, the flange can be formed of a low-cost metal material, and the portion of the flange that is likely to come into contact with the exhaust gas is covered with the sleeve having high corrosion resistance, whereby corrosion of the flange can be suppressed. Also, unlike the flange, it is easy to form the thickness of the sleeve small. Therefore, corrosion of the flange can be suppressed and the cost of the joint structure can be reduced at the same time.
Further, by joining the sleeve to the flange, it is possible to suppress the flange from moving when the joining structure is attached to the counterpart member. As a result, workability of fastening the flange can be improved. Further, since the surface pressure generated by the flange can be uniformly transmitted to the sleeve, the sealing property can be improved.
In one aspect of the present disclosure, the conduit may constitute an exhaust gas recirculation flow path. According to this structure, it is possible to effectively suppress corrosion of the flange in the exhaust gas recirculation flow path (EGR) in which the temperature is drastically changed due to intermittent flow of exhaust gas having high humidity or temperature and corrosion is easily caused by condensation, and to reduce the cost of the joint structure.
In one aspect of the disclosure, the sleeve may further have at least 1 ear, at least 1 ear protruding from the ring to a radially outer side of the duct. At least 1 ear can be provided with the through-hole respectively. According to this configuration, since the sleeve can be easily positioned with respect to the flange, the number of working steps can be reduced, and the positional accuracy can be improved.
Drawings
Fig. 1 is a schematic explanatory view of an exhaust manifold using a joint structure of pipes according to an embodiment.
Fig. 2A is a schematic front view of a joint structure of pipes of the embodiment.
Fig. 2B is a schematic rear view of the joining structure of the pipes of fig. 2A.
Fig. 3 is a schematic cross-sectional view at line III-III of fig. 2B.
Fig. 4 is a schematic sectional view of a joint structure of pipes of an embodiment different from fig. 3.
Detailed Description
Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings.
[1 ] embodiment 1 ]
[1-1. Structure ]
A joint structure 1 of pipes (hereinafter, simply referred to as "joint structure") shown in fig. 1 and fig. 2A and 2B is used for connecting pipes that constitute a flow path of exhaust gas discharged from an internal combustion engine. As shown in fig. 1, the joint structure 1 is provided to an exhaust manifold 10. Further, as shown in fig. 2A, 2B, the joint structure 1 includes a pipe 2, a flange 3, and a sleeve 4.
< piping >
The duct 2 constitutes a flow path of exhaust gas discharged from the internal combustion engine. The pipe 2 is formed of a metal having resistance against corrosion caused by exhaust gas of high temperature, for example, stainless steel.
In the present embodiment, the pipe 2 constitutes EGR of an automobile for sucking a part of exhaust gas discharged from an internal combustion engine into the internal combustion engine. That is, the joint structure 1 is to be connected to a joint of a pipe constituting an intake path of the internal combustion engine.
< Flange >
The flange 3 is a member provided at an end of the pipe 2 and protruding radially outward of the pipe 2. The flanges 3 are configured to be fastened to each other with a gasket interposed therebetween.
An opening 3A is formed in the flange 3, and an end of the duct 2 is inserted through the opening 3A. In the present embodiment, the diameter of the opening 3A is larger than the outer diameter of the pipe 2, and a cylindrical portion 4B of the sleeve 4 described later is present between the opening 3A and the pipe 2.
As shown in fig. 3, the flange 3 and the counterpart flange a2 are fastened to each other, wherein the counterpart flange a2 is provided on the counterpart conduit a1 connected to the jointing structure 1. The flange 3 is made of metal such as iron or steel, and the metal constituting the flange 3 is lower in corrosion resistance and cost than the metal constituting the sleeve 4.
As shown in fig. 3, of the fastening surface of the flange 3 (i.e., the surface facing the mating flange a 2), the central region 3B located around the opening 3A is recessed toward the pipe 2 (i.e., the surface facing the opposite side of the fastening surface of the flange 3 in the thickness direction of the flange) as compared to the end region 3C, which is located radially outward of the pipe 2 as compared to the central region 3B. That is, the thickness of the flange 3 at the central region 3B is smaller than the thickness of the flange 3 at the end regions 3C.
In the present embodiment, as shown in fig. 2B, the end region 3C is provided with the central region 3B and the central axis of the pipe 2 interposed therebetween. Further, a plurality of through holes 3D for fastening are formed in the end region 3C of the flange 3.
In the present embodiment, the flange 3 is fixed to the pipe 2 via a sleeve 4 described later, and is not directly joined to the pipe 2. However, the flange 3 may be directly joined to the pipe 2 by welding or the like.
< Sleeve >
The sleeve 4 is a member joined to both the pipe 2 and the flange 3. The sleeve 4 is made of a metal having higher corrosion resistance than the metal constituting the flange 3. Examples of the metal constituting the sleeve 4 include stainless steel.
As shown in fig. 2A and 2B, the sleeve 4 includes an annular portion 4A, a cylindrical portion 4B, and 2 ear portions 4C. The annular portion 4A, the cylindrical portion 4B, and the ear portion 4C are formed by processing a single metal plate.
(Ring-shaped portion)
As shown in fig. 3, the annular portion 4A is configured to be continuous with a2 nd end portion of the cylindrical portion 4B, which is an end portion of the cylindrical portion 4B opposite to the 1 st end portion thereof to be joined to the pipe 2, and to extend radially outward at least from the opening portion of the gasket 6. Specifically, the annular portion 4A overlaps the central region 3B of the fastening surface of the flange 3. As shown in fig. 2B, the annular portion 4A is provided around the opening 3A of the flange 3 when viewed from the thickness direction of the flange 3.
The annular portion 4A is projection-welded to the central region 3B of the flange 3. In the present embodiment, the annular portion 4A is projection-welded at 4 welded portions 5.
The 4 welded portions 5 are provided at positions that do not overlap with the gasket 6 disposed between the sleeve 4 and the counterpart flange a2 when the joint structure 1 is fastened. Further, 2 of the 4 welded portions 5 are provided close to each other, and the remaining 2 welded portions 5 are also provided close to each other. The groups consisting of 2 welds 5 arranged close to each other are arranged in symmetrical positions with respect to the centre of the pipe 2.
In the present embodiment, 4 welded portions 5 are provided in the vicinity of a portion where an ear portion 4C described later is connected to the annular portion 4A. That is, the annular portion 4A is welded to the flange 3 in the vicinity of the ear portion 4C.
Further, the number of the welding portions 5 is not limited to 4 as long as there is at least 1 welding portion 5. However, from the viewpoint of strength, it is preferable to provide at least 2 welding portions 5 disposed across the center of the pipe 2.
(cylindrical part)
The cylindrical portion 4B has a shape covering the entire circumference of the outer circumferential surface of the pipe 2, and is configured to be engageable with the entire circumference of the outer circumferential surface of the pipe 2 at the 1 st end portion. Specifically, as shown in fig. 3, the cylindrical portion 4B is inserted from the outside into the end portion of the pipe 2 in the axial direction, and the inner peripheral surface of the cylindrical portion 4B is joined to the outer peripheral surface of the pipe 2 by, for example, welding.
The cylindrical portion 4B is connected to the annular portion 4A and extends from the inner edge of the annular portion 4A in the axial direction of the pipe 2. The annular portion 4A and the cylindrical portion 4B are formed by flanging a metal plate provided with an opening.
In the present embodiment, the cylindrical portion 4B and the pipe 2 are joined by arc welding along the circumferential direction of the pipe 2. However, the method of welding the tubular portion 4B and the pipe 2 is not limited to arc welding.
In the present embodiment, the cylindrical portion 4B is disposed apart from the flange 3. That is, a gap is provided between the side surface of the flange 3 constituting the opening 3A and the outer peripheral surface of the cylindrical portion 4B.
(ear)
As shown in fig. 2B, each of the 2 ears 4C protrudes from the annular portion 4A to the outside in the radial direction of the duct 2. Further, through holes 4D are provided in regions of the 2 ears 4C that protrude radially outward of the duct 2 relative to the flange 3, respectively.
When the sleeve 4 is projection-welded to the flange 3, the sleeve 4 and the flange 3 can be easily and reliably positioned by inserting pins into the 2 through holes 4D.
[1-2. Effect ]
According to the embodiments described in detail above, the following effects can be obtained.
(1a) By forming the flange 3 from a low-cost metal material and covering a portion of the flange 3 that is likely to come into contact with exhaust gas (i.e., the central region 3B) with the sleeve 4 having high corrosion resistance, corrosion of the flange 3 can be suppressed. Also, unlike the flange, it is easy to form the thickness of the sleeve 4 small. Therefore, corrosion of the flange 3 can be suppressed and the cost of the joint structure 1 can be reduced at the same time.
(1b) By welding the sleeve 4 to the flange 3, the flange 3 can be prevented from moving when the joining structure 1 is attached to the counterpart member. As a result, workability of fastening the flange 3 can be improved. Further, since the surface pressure generated by the flange 3 can be uniformly transmitted to the sleeve 4, the sealing property can be improved.
(1c) Since the sleeve 4 is joined to the flange 3 at the annular portion 4A thereof by projection welding in which the heat input amount is smaller than that by arc welding, distortion of the fastening surface of the annular portion 4A can be reduced and flatness can be improved. Further, since the thickness of the sleeve 4 can be reduced by projection welding, the thickness of the sleeve 4 can be made close to the wall thickness of the pipe 2. As a result, cracks are prevented from occurring in the welded portion between the sleeve 4 and the pipe 2, and the welding strength between the sleeve 4 and the pipe 2 can be improved.
(1d) It is possible to effectively suppress corrosion of the flange 3 in EGR in which temperature is drastically changed due to intermittent flow of exhaust gas having high humidity or temperature and corrosion is easily caused by dew condensation, and to reduce the cost of the joint structure 1.
(1e) The positioning of the sleeve 4 with respect to the flange 3 can be easily performed by the 2 ear portions 4C provided with the through holes 4D, respectively. As a result, the number of working steps can be reduced, and the positional accuracy can be improved.
Specifically, when the sleeve 4 and the flange 3 are welded, a base on which a plurality of pins stand is used. The pins of the base are inserted through the through holes 4D of the sleeve 4, and the pins for fixing the flange are passed through the through holes 3D of the flange 3, followed by welding. This prevents the sleeve 4 from rotating, and the position of the sleeve 4 with respect to the flange 3 can be determined with good accuracy.
[2 ] other embodiments ]
The embodiments of the present disclosure have been described above, but the present disclosure is not limited to the above embodiments and various embodiments can be adopted.
(2a) In the pipe joining structure 1 of the above embodiment, the sleeve 4 may be joined to the flange 3 by spot welding instead of projection welding. Further, the sleeve 4 may be joined to the flange 3 by a method other than welding.
(2b) The pipe joint structure 1 of the above embodiment can also be applied to a pipe constituting an exhaust gas flow passage other than EGR. That is, the joint structure 1 is applicable to any pipe in the exhaust manifold of fig. 1.
(2c) In the pipe joining structure 1 of the above embodiment, the sleeve 4 may have 1 ear 4C or 3 or more ears 4C. Further, the sleeve 4 may not necessarily have the ear portion 4C.
(2d) In the pipe joining structure 1 of the above embodiment, as shown in fig. 4, the gasket may have the convex portions 6A protruding to both sides in the thickness direction. The convex portion 6A is provided in an annular shape in a radial center region of the gasket. In fig. 4, the annular portion 4A extends radially outward of the projection 6A. When the flange is fastened, the annular portion 4A crushes the convex portion 6A, thereby improving the sealing property.
(2e) The functions of 1 constituent element in the above-described embodiment may be dispersed into a plurality of constituent elements, or the functions of a plurality of constituent elements may be integrated into 1 constituent element. In addition, a part of the configuration of the above embodiment may be omitted. Further, at least a part of the configuration of the one embodiment may be added to the configuration of the other embodiment, or at least a part of the configuration of the one embodiment may be replaced with the configuration of the other embodiment. All aspects included in the technical idea defined by the terms described in the claims are embodiments of the present disclosure.

Claims (2)

1. A joint structure of a pipe to which a pipe constituting a flow path of exhaust gas discharged from an internal combustion engine is attached, comprising:
a flange and a sleeve, wherein the flange is provided with a flange,
the flanges are configured to be capable of being fastened to each other with the flanges on the other side by sandwiching a gasket therebetween, and the flanges have an opening and a central region,
the conduit may be inserted through the opening,
the central region extending from the opening to a radially outer side of the flange and being recessed in a thickness direction of the flange,
the sleeve is made of a metal having higher corrosion resistance than a metal constituting the flange, and has a cylindrical portion and an annular portion,
the cylindrical portion has a shape covering the entire circumference of the outer peripheral surface of the pipe, and the cylindrical portion is engageable with the entire circumference of the outer peripheral surface of the pipe at a1 st end portion thereof,
the annular portion is continuous with the 2 nd end portion of the cylindrical portion and extends radially outward of the sleeve at least from the opening portion of the gasket, and the annular portion is joined to the flange in the central region;
the sleeve further having at least 1 ear projecting from the ring portion radially outward of the duct,
at least 1 ear is provided with the through-hole respectively.
2. The joining structure of pipes according to claim 1,
the duct constitutes an exhaust gas recirculation flow path.
CN201811492904.5A 2018-01-05 2018-12-06 Joint structure of pipe Active CN110005513B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018000612A JP6676666B2 (en) 2018-01-05 2018-01-05 Piping joint structure
JP2018-000612 2018-01-05

Publications (2)

Publication Number Publication Date
CN110005513A CN110005513A (en) 2019-07-12
CN110005513B true CN110005513B (en) 2021-02-23

Family

ID=66995474

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811492904.5A Active CN110005513B (en) 2018-01-05 2018-12-06 Joint structure of pipe

Country Status (3)

Country Link
JP (1) JP6676666B2 (en)
CN (1) CN110005513B (en)
DE (1) DE102018130782A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113217233B (en) * 2021-05-07 2022-04-26 潍柴动力股份有限公司 Engine exhaust gas circulation system and engine misfire judging method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5041112U (en) * 1973-08-10 1975-04-25
ES1019713Y (en) * 1991-12-17 1993-01-01 Caetano Blasco Abilio FLANGE FOR THE JOINT OF SMOOTH END PIPES.
DE19725105A1 (en) * 1996-11-01 1998-05-14 Fischer Georg Rohrleitung collar bushing
JP5251220B2 (en) 2008-04-04 2013-07-31 トヨタ自動車株式会社 Piping joint structure
CN102207231A (en) * 2011-04-09 2011-10-05 扬州华宇管件有限公司 Inserted steel pipeline connecting structure
CN202228819U (en) * 2011-08-23 2012-05-23 重庆顾地塑胶电器有限公司 Connection structure of steel plastic composite pipe based on pipe opening turning edges
JP6449684B2 (en) * 2015-02-27 2019-01-09 フタバ産業株式会社 Connection structure
CN104633362A (en) * 2015-03-13 2015-05-20 高玉琴 Abrasion resistant sleeve compensator

Also Published As

Publication number Publication date
JP6676666B2 (en) 2020-04-08
CN110005513A (en) 2019-07-12
DE102018130782A1 (en) 2019-07-11
JP2019120192A (en) 2019-07-22

Similar Documents

Publication Publication Date Title
JP5340416B2 (en) Connection arrangement of turbine housing and bearing housing and exhaust turbocharger
US9341081B2 (en) Turbine housing of an exhaust gas turbocharger
US9745885B2 (en) Modular manifold for motor vehicles
JPWO2009139333A1 (en) Exhaust treatment device and manufacturing method thereof
KR20070026193A (en) Muffler
CN110005513B (en) Joint structure of pipe
KR20140110048A (en) Exhaust turbocharger
JP5869032B2 (en) Exhaust system components
JP2007278221A (en) Seal structure for internal combustion engine and gasket used for the same
US20200088144A1 (en) Silencer for the Reduction of Gas Noise in an Intake System of a Combustion Engine and a Method for the Production of Such a Silencer
CN112814773A (en) Exhaust pipe structure of internal combustion engine-mounted vehicle and manufacturing method of internal combustion engine-mounted vehicle
JP2019085949A (en) Turbine housing
JP2018173065A (en) Exhaust emission control system
JPWO2019082639A1 (en) Heat shield cover for exhaust system
CN113323745B (en) Boss for sensor and mounting structure of boss for sensor
JP2017198443A (en) Heat exchanger
JP7384854B2 (en) Exhaust pipe
JP2018155325A (en) Piping connecting structure
JP2021107709A (en) Exhaust pipe and method for manufacturing exhaust pipe
EP1213453A1 (en) Housing for catalytic converter
JP2021148001A (en) Manufacturing method for joint body
JP2024002846A (en) Exhaust emission control system and method for welding flange
JP3612427B2 (en) Surge tank and manufacturing method thereof
JP2008082319A (en) Exhaust manifold
US20210180503A1 (en) Thin walled welded connection

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant