CN112081637A - Corrugated pipe structure for corrosion prevention - Google Patents
Corrugated pipe structure for corrosion prevention Download PDFInfo
- Publication number
- CN112081637A CN112081637A CN202011045875.5A CN202011045875A CN112081637A CN 112081637 A CN112081637 A CN 112081637A CN 202011045875 A CN202011045875 A CN 202011045875A CN 112081637 A CN112081637 A CN 112081637A
- Authority
- CN
- China
- Prior art keywords
- pipe
- corrugated
- gas
- transition
- gas guide
- 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.)
- Pending
Links
- 238000005536 corrosion prevention Methods 0.000 title abstract description 4
- 230000007704 transition Effects 0.000 claims abstract description 38
- 238000005260 corrosion Methods 0.000 claims abstract description 15
- 230000007797 corrosion Effects 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/30—Exhaust heads, chambers, or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/005—Selecting particular materials
-
- 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
- F01N13/16—Selection of particular materials
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Materials Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention discloses a corrugated pipe structure for corrosion prevention, which comprises a corrugated section, a transition pipe, a gas guide pipe and a gas outlet pipe, wherein the front end and the rear end of the corrugated section are respectively connected with the gas outlet pipe and the transition pipe; the other end of the transition pipe is sleeved with a pipe body of the gas guide pipe extending out of the corrugated section and is welded and fixed. The invention has the advantages of vibration resistance, good corrosion resistance, reliable structure and the like.
Description
Technical Field
The invention relates to the technical field of engine accessory accessories, in particular to a corrugated pipe structure for corrosion prevention.
Background
The vortex rear connecting pipe is an important connecting structure of a compression ignition type engine and a spark ignition type engine, is generally arranged between an engine exhaust pipe and a silencer or a postprocessor, and is also arranged between split type and sectional type postprocessors, so that the vortex rear connecting pipe is changeable and flexible in shape, an exhaust silencing system of a passenger car, a commercial car and an engineering car is convenient to arrange, the space of the whole car is utilized more efficiently, and the diversion effect of high-temperature gas is borne. According to the space condition and the application field of the whole vehicle, the vortex rear pipe can adopt a cast pipeline, a welded steel pipe, a corrugated pipe, a reducing pipeline, a conformal pipeline and the like. The welded corrugated pipe is widely applied, but the welded corrugated pipe structure is designed aiming at high temperature, corrosive tail gas, urea mixed gas (the tail gas and urea solution are subjected to chemical reaction, and harmful pollutant emission is reduced) and the like without pertinence at present, and an inner gas layer conduit is unreasonable in design, so that corrosive gas flows back and impacts, the corrugated pipe is corroded, high-temperature gas is leaked, and the fire danger of the whole vehicle is caused; meanwhile, the tail gas leakage leads to the increase of the noise of the whole vehicle, and untreated gas is discharged to pollute the environment.
The above background disclosure is only for the purpose of assisting understanding of the concept and technical solution of the present invention and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.
Disclosure of Invention
The invention aims to provide a corrugated pipe with good vibration resistance and corrosion resistance and reliable structure.
To this end, the invention proposes a bellows structure for corrosion protection purposes.
Preferably, the invention can also have the following technical features:
the corrugated pipe structure for the anti-corrosion purpose comprises a corrugated section, a transition pipe, a gas guide pipe and a gas outlet pipe, wherein the front end and the rear end of the corrugated section are respectively connected with the gas outlet pipe and the transition pipe; the other end of the transition pipe is sleeved with a pipe body of the gas guide pipe extending out of the corrugated section and is welded and fixed.
Furthermore, the connecting end of the air outlet pipe and the corrugated section is of a flared pipe structure; the front end of the corrugated section is fixed on the flared tube of the air outlet tube.
Furthermore, the transition pipe is in a flared pipe structure, and the axial interface of the transition pipe is in an S-shaped nonlinear structure; and the flaring pipe of the transition pipe is connected with the rear end of the corrugated section.
Furthermore, the front end of the gas conduit is of a tapered conical surface structure.
Furthermore, the outer side of the conical surface of the gas guide pipe is in contact with the transition position of the flared pipe of the gas outlet pipe.
Furthermore, the inclination angle of the tapered conical surface of the gas guide pipe is 5-11 degrees.
Further, the front part of the tapered surface of the gas guide tube is in contact with the gas outlet tube.
Furthermore, an annular flange is arranged outside the tapered conical surface of the gas guide pipe; the gas guide pipe is contacted with the inner pipe wall of the gas outlet pipe through the flange.
Further, the top of the flange is a circular arc surface, and one side of the flange facing the front end of the gas guide pipe is a circular arc concave surface.
Furthermore, one end of the transition pipe is welded and sealed with the rear end of the corrugated section, and the other end of the transition pipe is welded and sealed with the outer side of the gas guide pipe; and the corrugated section is welded and sealed with the air outlet pipe.
Compared with the prior art, the invention has the advantages that: the transition pipe adopts an S-shaped nonlinear structure, so that the damping on the transition pipe is weakened by vibration, the reliability of the corrugated pipe is improved, and the cracking hidden danger of welding spots is reduced; the flaring pipe of the air outlet pipe adopts an S-shaped nonlinear structure which is the same as that of the transition pipe, so that the vibration transmitted to the air outlet pipe by the corrugated section is weakened again, and the overall reliability of the whole corrugated pipe is further improved; the inclination angle of the tapered conical surface of the gas guide pipe is 5-11 degrees, on one hand, the flowing speed of gas is accelerated, and on the other hand, the rotational flow of the gas is reduced; one side of the flange facing the front end of the gas guide pipe is an S-shaped cambered surface, so that the impact of gas rotational flow on the contact between the gas guide pipe and the gas outlet pipe is effectively reduced.
Drawings
Fig. 1 is a structural sectional view of the present invention.
Fig. 2 is a structural sectional view of another embodiment of the present invention.
Fig. 3 is an enlarged view of a portion a of fig. 2.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein like reference numerals refer to like parts, unless otherwise specified.
Fig. 1 shows a corrugated pipe structure for corrosion protection, which comprises a corrugated pipe body composed of a corrugated section 1, a transition pipe 7, a gas guide pipe 3 and a gas outlet pipe 6 and having an isolated corrugated section 1. Specifically, the front end and the rear end of the corrugated section 1 are respectively connected with the gas outlet pipe 6 and the transition pipe 7, the gas guide pipe 3 is arranged inside the corrugated section 1, the front end of the gas guide pipe 3 extends along the axial direction of the corrugated section 1 and is abutted against the inner wall of the gas outlet pipe 6, the rear end of the gas guide pipe 3 extends out of the corrugated section 1, and the other end of the transition pipe 7 is sleeved with the pipe body 31 of the gas guide pipe 3 extending out of the corrugated section 1 and is welded and fixed. The rear end of the air outlet pipe 6 is of a flared pipe structure, and the front end of the corrugated section 1 is fixedly connected with the flared pipe of the air outlet pipe 6.
The transition pipe 7 is of a flared pipe structure and comprises a flared part at the front end and a main pipe part at the rear end, the flared part is welded and fixed with the rear end of the corrugated section 1, and the main pipe part is annularly sleeved on the outer side of the pipe body 3, extending out of the corrugated section 1, of the gas guide pipe 3 and is fixed with the pipe body 3 through welding. Thus, a closed cavity 2 is formed between the outer side of the gas conduit 3 and the corrugated section 1, the transition pipe 7 and the gas outlet pipe 6. The transition pipe 7 adopts an S-shaped nonlinear structure, so that the damping of gas vibration on the transition pipe 7 is weakened during working, and the reliability of the corrugated pipe is improved; the flaring pipe of the air outlet pipe 6 adopts an S-shaped nonlinear structure which is the same as that of the transition pipe 7, so that the vibration transmitted to the air outlet pipe 6 by the corrugated section 1 is weakened again, and the overall reliability of the corrugated pipe is further improved.
In the preferred embodiment of the above technical solution, the front end of the gas conduit 3 is in a tapered conical surface 4 structure. The outer side of the conical surface 4 of the gas guide pipe 3 is contacted with a flared pipe transition part 5 of the gas outlet pipe 6. When the gas conduit 3 is contacted with the gas outlet pipe 6, the two have the characteristics at the butt joint position: the gas guide pipe 3 is contacted with the gas outlet pipe 6 through the outer side of the conical surface 4 at the front end; for the gas outlet pipe 6, the rear end of the gas outlet pipe, which is in contact with the gas guide pipe 3, is of a flared pipe structure, and a transition part 5 of the flared pipe is provided with a bending angle, so that a space is provided for the gas guide pipe 3 to swing to a certain extent. Therefore, the radial section of the contact point of the gas guide pipe 3 and the gas outlet pipe 6 is in contact arc line sealing, and the axial section is in contact point sealing. The contact point seal has the advantages that the seal points can move along with the displacement of the corrugated section 1 in all directions, the sealing effect can be guaranteed, the bending freedom degree of the corrugated pipe can be improved, the front and rear system connection of the pipeline is facilitated, and the reliability of the whole pipeline is further improved. The conical surface 4 and the arc section of the gas outlet pipe 6 of the gas guide pipe 3 form contact point seal, on one hand, the structure can accelerate the flow of gas flow at the front end of the gas guide pipe, on the other hand, high-temperature gas can be prevented from flowing back to the cavity 2 inside the corrugated pipe, accumulation and corrosion of corrosive gas in the corrugated pipe section 1 are avoided, and the overall reliability of the corrugated pipe is improved. The inclination angle of the tapered conical surface of the gas guide pipe 3 is 5-11 degrees, on one hand, the flowing speed of gas is accelerated, and on the other hand, the rotational flow of the gas is reduced.
And the front end and the rear end of the corrugated section 1 are also provided with annular reinforcing belts 8 for reinforcing the connection between the transition pipe 7 and the corrugated section 1 and between the air outlet pipe 6 and the corrugated section 1. Two ends of the corrugated section 1 are sealed with the air outlet pipe 6 and the transition pipe 7 in a welding mode; the front end of the gas guide pipe 3 is sealed with the contact point inside the gas outlet pipe 6, and the rear end is welded and sealed with the transition pipe 7. Thereby forming a sealed cavity 2 to seal the interior of the corrugated section 1 and effectively preventing the discharged gas from corroding the corrugated section.
More specifically, the transition pipe is made of one of aluminum-based alloy, nickel-aluminum alloy, chromium-nickel alloy, nickel-based alloy and nickel-copper alloy.
Referring to fig. 2-3, in another embodiment of the contact connection between the gas conduit 3 and the gas outlet pipe 6, an annular flange 32 is provided outside the tapered surface 4 of the gas conduit 3; the gas conduit 3 is in contact with the inner pipe wall of the gas outlet pipe 6 through the flange 32. The top of the flange 32 is a circular arc surface, and one side of the flange 32 facing the front end of the gas conduit 3 is a circular arc concave surface. Thus, the side of the flange facing the front end of the gas guide pipe is an S-shaped cambered surface 33, and the impact of the gas rotational flow on the contact point of the gas guide pipe 3 and the gas outlet pipe 6 is effectively reduced.
Those skilled in the art will recognize that numerous variations are possible in light of the above description, and therefore the examples and drawings are merely intended to describe one or more specific embodiments.
While there has been described and illustrated what are considered to be example embodiments of the present invention, it will be understood by those skilled in the art that various changes and substitutions may be made therein without departing from the spirit of the invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the present invention without departing from the central concept described herein. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments and equivalents falling within the scope of the invention.
Claims (10)
1. The utility model provides a bellows structure of anticorrosive usage, includes ripple section, transition pipe, gas conduit, outlet duct, its characterized in that: the front end and the rear end of the corrugated section are respectively connected with the air outlet pipe and the transition pipe, the front end of the gas guide pipe is in contact with the arc line of the inner pipe wall of the air outlet pipe, and the rear end of the gas guide pipe extends out of the corrugated section; the other end of the transition pipe is sleeved with a pipe body of the gas guide pipe extending out of the corrugated section and is welded and fixed.
2. A corrugated pipe structure for corrosion protection according to claim 1, wherein: the connecting end of the air outlet pipe and the corrugated section is of a flared pipe structure; the front end of the corrugated section is fixed on the flared tube of the air outlet tube.
3. A corrugated pipe structure for corrosion protection according to claim 1, wherein: the transition pipe is of a flared pipe structure, and an axial interface of the transition pipe is of an S-shaped nonlinear structure; and the flaring pipe of the transition pipe is connected with the rear end of the corrugated section.
4. A corrugated pipe structure for corrosion protection according to claim 1, wherein: the front end of the gas conduit is of a tapered conical surface structure.
5. A corrugated pipe structure for corrosion protection according to claim 4, wherein: the outer side of the conical surface of the gas guide pipe is in contact with the transition part of the flared pipe of the gas outlet pipe.
6. A corrugated pipe structure for corrosion protection according to claim 5, wherein: the inclination angle of the tapered conical surface of the gas guide pipe is 5-11 degrees.
7. A corrugated pipe structure for corrosion protection according to claim 5, wherein: the front part of the tapered conical surface of the gas guide pipe is contacted with the gas outlet pipe.
8. A corrugated pipe structure for corrosion protection according to claim 4, wherein: an annular flange is arranged outside the tapered conical surface of the gas guide pipe; the gas guide pipe is contacted with the inner pipe wall of the gas outlet pipe through the flange.
9. A corrugated pipe structure for corrosion protection according to claim 8, wherein: the top of the flange is an arc surface, and one side of the flange, which faces the front end of the gas conduit, is an arc concave surface.
10. A corrugated pipe structure for corrosion protection according to claim 1, wherein: one end of the transition pipe is welded and sealed with the rear end of the corrugated section, and the other end of the transition pipe is welded and sealed with the outer side of the gas guide pipe; and the corrugated section is welded and sealed with the air outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011045875.5A CN112081637A (en) | 2020-09-28 | 2020-09-28 | Corrugated pipe structure for corrosion prevention |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011045875.5A CN112081637A (en) | 2020-09-28 | 2020-09-28 | Corrugated pipe structure for corrosion prevention |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112081637A true CN112081637A (en) | 2020-12-15 |
Family
ID=73738826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011045875.5A Pending CN112081637A (en) | 2020-09-28 | 2020-09-28 | Corrugated pipe structure for corrosion prevention |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112081637A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147832A (en) * | 2013-03-19 | 2013-06-12 | 中国北方发动机研究所(天津) | Corrugated pipe combined structure for diesel engine |
| CN210122931U (en) * | 2019-06-25 | 2020-03-03 | 潍柴重机股份有限公司 | Exhaust manifold connection structure |
| CN210977656U (en) * | 2019-12-11 | 2020-07-10 | 厦门林巴贺航空发动机股份有限公司 | Exhaust pipe with corrugated pipe connecting structure |
| CN212656867U (en) * | 2020-09-28 | 2021-03-05 | 广西玉柴机器股份有限公司 | Corrugated pipe structure for corrosion prevention |
-
2020
- 2020-09-28 CN CN202011045875.5A patent/CN112081637A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147832A (en) * | 2013-03-19 | 2013-06-12 | 中国北方发动机研究所(天津) | Corrugated pipe combined structure for diesel engine |
| CN210122931U (en) * | 2019-06-25 | 2020-03-03 | 潍柴重机股份有限公司 | Exhaust manifold connection structure |
| CN210977656U (en) * | 2019-12-11 | 2020-07-10 | 厦门林巴贺航空发动机股份有限公司 | Exhaust pipe with corrugated pipe connecting structure |
| CN212656867U (en) * | 2020-09-28 | 2021-03-05 | 广西玉柴机器股份有限公司 | Corrugated pipe structure for corrosion prevention |
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