WO2011068202A1 - Joint statique et sa structure de connexion a un tuyau d'echappement - Google Patents

Joint statique et sa structure de connexion a un tuyau d'echappement Download PDF

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Publication number
WO2011068202A1
WO2011068202A1 PCT/JP2010/071691 JP2010071691W WO2011068202A1 WO 2011068202 A1 WO2011068202 A1 WO 2011068202A1 JP 2010071691 W JP2010071691 W JP 2010071691W WO 2011068202 A1 WO2011068202 A1 WO 2011068202A1
Authority
WO
WIPO (PCT)
Prior art keywords
gasket
periphery
bead
opening
reducing agent
Prior art date
Application number
PCT/JP2010/071691
Other languages
English (en)
Japanese (ja)
Inventor
功 大原
信之 平木
達夫 益子
Original Assignee
いすゞ自動車株式会社
日野自動車株式会社
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 いすゞ自動車株式会社, 日野自動車株式会社 filed Critical いすゞ自動車株式会社
Priority to CN201080048466.9A priority Critical patent/CN102648342B/zh
Publication of WO2011068202A1 publication Critical patent/WO2011068202A1/fr

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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
    • F01N13/18—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
    • 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
    • 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
    • F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/24—Methods or apparatus for fitting, inserting or repairing different elements by bolts, screws, rivets or the like
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]

Definitions

  • the present invention relates to a gasket and exhaust pipe connection structure, and more particularly to a technique for preventing corrosion of bolts that tighten flanges of pipe joints.
  • a selective reduction catalyst (SCR) device has been developed as one of exhaust gas purification devices in order to purify NOx in exhaust gas of an engine, for example, a diesel engine (see, for example, Patent Documents 1 and 2).
  • This SCR device supplies, for example, urea water, which is a liquid reducing agent, upstream of the exhaust gas of the SCR device, hydrolyzes urea with the heat of the exhaust gas to generate ammonia, and this ammonia reduces NOx on the SCR catalyst. To purify it.
  • urea water which is a liquid reducing agent
  • connection portion such as a supply pipe of the urea water supply device or the SCR device and the exhaust pipe
  • a gasket is provided between the flanges 20 and 21 constituting the pipe joint as shown in FIG. 5 in order to ensure the sealing performance of the connection portion.
  • a structure in which the flanges 20 and 21 are fastened with bolts 27 and nuts 28 with 22B interposed therebetween is employed.
  • Reference numeral 29 denotes a washer.
  • a plurality of holes 30 for inserting bolts are formed in the flanges 20 and 21 at appropriate intervals in the circumferential direction.
  • the gasket 22B includes an opening 23 formed in the center for exhaust gas passage, a plurality of holes 24 formed in the periphery for bolt insertion, and a periphery of the opening 23 for substantial sealing. It has an annular main bead (projection) portion 25 formed to protrude in the vicinity.
  • connection portion if urea water leaks from the main bead portion 25 of the gasket 22B, the urea water may adhere to the bolts 27. If urea water adheres to the bolt 27 and the bolt 27 corrodes and breaks, the connection between the flanges 20 and 21 cannot be maintained, and a serious problem may occur.
  • the present invention has been made in consideration of the above circumstances, and even if the liquid reducing agent leaks from the main bead portion of the gasket, the liquid reducing agent can be prevented from being applied to the bolt, and corrosion by the liquid reducing agent can be prevented. It is an object of the present invention to provide a gasket and exhaust pipe connection structure that can prevent the deterioration and breakage of bolts caused by the above.
  • a gasket according to the present invention has an opening for exhaust gas and a plurality of holes for inserting bolts on the periphery, and is formed to protrude from the periphery of the opening. It has an annular main bead portion and an annular sub-bead portion formed to protrude from the peripheral portion of the hole portion.
  • the raised height of the sub-bead portion is lower than the raised height of the main bead portion.
  • the main bead and the secondary bead are formed so that the back side is recessed and the front side is raised by beading.
  • the gasket according to the present invention has a plurality of holes for inserting bolts at the periphery of the opening for exhaust gas, an annular main bead raised at the periphery of the opening, and the periphery of the hole It is characterized in that it is formed by integrally joining a pair of gasket constituent pieces formed by forming annular sub-beads raised at the portions back to back.
  • the exhaust pipe connection structure according to the present invention is provided by connecting a liquid reducing agent supply pipe section and a selective reduction catalyst device in the middle of an exhaust pipe of a diesel engine by a pipe joint, and selecting the liquid reducing agent supply pipe section. Any one of the gaskets is interposed between both flanges of a pipe joint connecting the reduction catalyst device.
  • the sub-bead portion can prevent the liquid reducing agent from being applied to the bolt, and the deterioration of the bolt due to corrosion by the liquid reducing agent. And breakage can be prevented.
  • FIGS. 3A and 3B are views showing a gasket used in the exhaust gas purification device connecting portion of FIG. 2, wherein FIG. 3A is a plan view, and FIG. 3B is a cross-sectional view taken along line BB in FIG. It is sectional drawing of a gasket structural piece. It is sectional drawing which shows the structure of the conventional exhaust-gas purification apparatus connection part.
  • reference numeral 1 denotes an engine such as a diesel engine.
  • An exhaust pipe 3 is connected to an exhaust manifold 2 of the engine 1.
  • An NOx reduction SCR device (also referred to as an SCR unit) 4 which is one of exhaust gas purification devices, is connected to the exhaust pipe 3 in the middle of the exhaust pipe 3, and liquid reduction is performed upstream of the SCR device 4.
  • a urea water supply pipe part (liquid reducing agent supply pipe part) 8 provided with an injection nozzle 7 for supplying urea water 5 as an agent to the SCR catalyst 6 of the SCR device 4 is connected.
  • the exhaust pipe 3 is divided into a front portion 3a and a rear portion 3b.
  • a urea water storage tank 10 is connected to the injection nozzle 7 of the urea water supply pipe section 8 via a urea water supply pipe 9.
  • the urea water storage tank 10 is configured to pump the urea water 5 to the injection nozzle 7 through the urea water supply pipe 9.
  • the SCR device 4 is mainly composed of an SCR catalyst 6 and a cylindrical container 11 containing the SCR catalyst 6.
  • a funnel-shaped exhaust gas inlet member 12 and an exhaust gas outlet member 13 are detachably connected to the front end portion and the rear end portion of the container 11 via first and second pipe joints 14 and 15, respectively.
  • a rear portion 3 b of the exhaust pipe 3 is connected to the exhaust gas outlet member 13 via a third pipe joint 16.
  • the urea water supply pipe portion 8 is detachably connected to the exhaust gas inlet member 12 via a fourth pipe joint 17, and the urea water supply pipe portion 8 is connected to the front portion 3 a of the exhaust pipe 3. Are detachably connected via the fifth pipe joint 18.
  • a connecting portion of the SCR device 4 for example, a fourth pipe joint upstream of the SCR catalyst 6 of the SCR device 4 and downstream of the urea water injection nozzle 7.
  • a gasket 22A according to an embodiment of the present invention is used.
  • the gasket 22 ⁇ / b> A has an opening 23 for exhaust gas at the center and a plurality of holes 24 for inserting bolts at the periphery, and at the periphery of the opening 23. It has an annular main bead portion 25 formed so as to be raised, and an annular sub-bead portion 26 formed so as to be raised on the peripheral portion of the hole portion 24.
  • the diameter of the opening 23 is set larger than the diameter of the hole 24.
  • gasket 22A a pair (two) of gasket constituent pieces 22p made of a material having heat resistance and corrosion resistance as shown in FIG. In addition, they are integrally joined by spot welding.
  • the main bead portion 25 and the sub bead portion 26 of the gasket component piece 22p are formed so as to protrude from one surface of the gasket component piece 22p so that the back surface side is depressed and the front surface side is raised by beading processing which is a kind of sheet metal processing. Yes.
  • the opening 23 and the hole 24 are formed by punching.
  • the gasket 22A in the illustrated example is formed in a planar triangle, it may be formed in a plurality of polygons, polygons, or circles.
  • the raised height ha of the sub bead portion 26 is formed lower than the raised height hb of the main bead portion 25, In other words, the raised height hb of the main bead portion 25 is preferably formed higher than the raised height ha of the auxiliary bead 26.
  • the gasket 22 ⁇ / b> A is interposed between the flanges 20 and 21 constituting the fourth pipe joint 17, and is clamped between the flanges 20 and 21 by tightening the flanges 20 and 21 with bolts 27 and nuts 28.
  • Reference numeral 29 denotes a washer.
  • a plurality of holes 30 for inserting bolts are formed in the flanges 20 and 21 at appropriate intervals in the circumferential direction.
  • the exposed portion of the bolt 27 exposed between the flanges 20 and 21 is sealed by the sub bead portion 26. Even if ammonia leaks, the urea water or ammonia can be prevented from being applied (contacted) to the bolt 27, and the deterioration or breakage of the bolt 27 due to the corrosion by the urea water or ammonia can be prevented, thereby improving the durability. I can plan.
  • gasket of the present embodiment is also applied to the gasket in the first pipe joint 14.
  • gasket of this embodiment may be applied to all the pipe joints.

Abstract

L'invention concerne un joint statique et une structure permettant de le connecter à un tuyau d'échappement, qui peut, même si un réducteur liquide fuit d'un bourrelet principal du joint statique, empêcher le réducteur liquide de se déverser sur les boulons et, par conséquent, la détérioration et la rupture des boulons du fait de la corrosion provoquée par le réducteur liquide. Le joint statique selon l'invention a : une ouverture (23) destinée aux gaz d'échappement; plusieurs trous (24) installés sur la périphérie du joint statique à travers lesquels on fait passer un boulon; un bourrelet annulaire principal (25) formé de manière saillante autour de la périphérie de l'ouverture (23); et des bourrelets annulaires secondaires (26), chacun formé de manière saillante autour de la périphérie d'un desdits trous (24).
PCT/JP2010/071691 2009-12-04 2010-12-03 Joint statique et sa structure de connexion a un tuyau d'echappement WO2011068202A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201080048466.9A CN102648342B (zh) 2009-12-04 2010-12-03 垫圈及排气管的连接构造

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009276723A JP5491151B2 (ja) 2009-12-04 2009-12-04 ガスケット
JP2009-276723 2009-12-04

Publications (1)

Publication Number Publication Date
WO2011068202A1 true WO2011068202A1 (fr) 2011-06-09

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PCT/JP2010/071691 WO2011068202A1 (fr) 2009-12-04 2010-12-03 Joint statique et sa structure de connexion a un tuyau d'echappement

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JP (1) JP5491151B2 (fr)
CN (1) CN102648342B (fr)
WO (1) WO2011068202A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5911163B1 (ja) * 2015-05-10 2016-04-27 有限会社 東進車輌工業 排気管用メタルガスケット

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013016235A1 (de) * 2013-10-01 2015-04-02 Deutz Aktiengesellschaft Abgasanlage für Dieselfahrzeuge
CN105156224A (zh) * 2015-10-30 2015-12-16 重庆长安汽车股份有限公司 一种排气歧管密封垫

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6152938A (ja) * 1984-08-22 1986-03-15 Nippon Metal Gasket Kk 金属ガスケットのビード形成用金型
JPS62177363A (ja) * 1986-01-30 1987-08-04 Yuusan Gasket Kk 排気マニホ−ルド用ガスケツト
JP2009024654A (ja) * 2007-07-23 2009-02-05 Bosch Corp 内燃機関の排気浄化装置、ミキサープレート、及びミキサーユニット、並びにミキサープレート用プレス成型装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0765684B2 (ja) * 1989-12-13 1995-07-19 日本ラインツ株式会社 メタルガスケット
JP4156528B2 (ja) * 2002-04-04 2008-09-24 日本メタルガスケット株式会社 金属ガスケット
JP2009191870A (ja) * 2008-02-12 2009-08-27 Ishikawa Gasket Co Ltd 金属製ガスケット

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6152938A (ja) * 1984-08-22 1986-03-15 Nippon Metal Gasket Kk 金属ガスケットのビード形成用金型
JPS62177363A (ja) * 1986-01-30 1987-08-04 Yuusan Gasket Kk 排気マニホ−ルド用ガスケツト
JP2009024654A (ja) * 2007-07-23 2009-02-05 Bosch Corp 内燃機関の排気浄化装置、ミキサープレート、及びミキサーユニット、並びにミキサープレート用プレス成型装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5911163B1 (ja) * 2015-05-10 2016-04-27 有限会社 東進車輌工業 排気管用メタルガスケット

Also Published As

Publication number Publication date
CN102648342A (zh) 2012-08-22
JP5491151B2 (ja) 2014-05-14
CN102648342B (zh) 2015-04-29
JP2011117389A (ja) 2011-06-16

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