CN210829447U - Diesel engine exhaust system of wood chip ship - Google Patents
Diesel engine exhaust system of wood chip ship Download PDFInfo
- Publication number
- CN210829447U CN210829447U CN201921656146.6U CN201921656146U CN210829447U CN 210829447 U CN210829447 U CN 210829447U CN 201921656146 U CN201921656146 U CN 201921656146U CN 210829447 U CN210829447 U CN 210829447U
- Authority
- CN
- China
- Prior art keywords
- pipe
- diesel engine
- catalytic reduction
- selective catalytic
- reduction reactor
- 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.)
- Withdrawn - After Issue
Links
- 239000002023 wood Substances 0.000 title claims description 5
- 238000010531 catalytic reduction reaction Methods 0.000 claims abstract description 35
- 238000002156 mixing Methods 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 20
- 238000003780 insertion Methods 0.000 claims abstract description 12
- 230000037431 insertion Effects 0.000 claims abstract description 12
- 230000006978 adaptation Effects 0.000 claims description 2
- MBLBDJOUHNCFQT-LXGUWJNJSA-N aldehydo-N-acetyl-D-glucosamine Chemical compound CC(=O)N[C@@H](C=O)[C@@H](O)[C@H](O)[C@H](O)CO MBLBDJOUHNCFQT-LXGUWJNJSA-N 0.000 abstract description 8
- 239000000428 dust Substances 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 9
- 230000008021 deposition Effects 0.000 description 9
- 238000004364 calculation method Methods 0.000 description 7
- 239000003054 catalyst Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a saw-dust ship diesel engine exhaust system, including the diesel engine, the hybrid tube that links to each other with the diesel engine blast pipe, the high pressure selective catalytic reduction reactor that links to each other with the hybrid tube and the booster that links to each other with high pressure selective catalytic reduction reactor, hybrid tube, high pressure selective catalytic reduction reactor, booster set gradually along the exhaust direction, connect through a plurality of expansion joints and shrimp shell between blast pipe, hybrid tube, high pressure selective catalytic reduction reactor and the booster, link to each other through the branch pipe between high pressure selective catalytic reduction reactor and the booster; the long axis of the diesel engine, the long axis of the supercharger and the long axis of the high-pressure selective catalytic reduction reactor are parallel or form an included angle of less than 10 degrees, and the mixing pipe and the branch pipe are parallel or form an included angle of less than 10 degrees; a pair of insertion shafts are arranged on the inner wall of the pipe orifice at the tail end of the exhaust pipe of the diesel engine, and spherical metal nets are arranged on the insertion shafts in a matched mode. The utility model discloses required space is little, accords with the environmental protection requirement.
Description
Technical Field
The utility model relates to a saw-dust ship diesel engine exhaust system.
Background
The Selective Catalytic Reduction (SCR) technology aims at NO in tail gas emission of diesel vehiclesxThe treatment process of (1) is to spray reducing agent ammonia or urea under the action of catalyst to treat NO in tail gasxReduction to N2And H2And O. Saw-dust ship such as 64000DWT ship of so big load ton, its diesel engine is often very big, for reaching the environmental protection requirement needs the SOx/NOx control, and the diesel engine exhaust system of whole saw-dust ship can be very huge like this, occupies a large amount of hull spaces, and its space of present diesel engine exhaust system occupies greatly, can not accomplish heavy oil and low sulfur oil and can both denitration treatment to current denitration treatment can not avoid increasing blast pipe department backpressure. In addition, the diesel engine has insufficient combustion and poor fuel vaporization, and carbon deposition on the inner wall of the nozzle of the exhaust pipe often occurs.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the defect that exists among the prior art, provide a saw-dust ship diesel engine exhaust system, required space is little, accords with the environmental protection requirement. Meets the TIII requirements of modern ship power and waste gas emission.
In order to achieve the purpose, the technical scheme of the utility model is to design a saw-dust ship diesel engine exhaust system, including the diesel engine, the hybrid tube that links to each other with the diesel engine blast pipe, the high pressure selective catalytic reduction reactor that links to each other with the hybrid tube and the booster that links to each other with the high pressure selective catalytic reduction reactor, the hybrid tube, the high pressure selective catalytic reduction reactor, the booster sets gradually along the exhaust direction, connect through a plurality of expansion joints and bending connection spare between blast pipe, hybrid tube, high pressure selective catalytic reduction reactor and the booster, link to each other through the branch pipe between high pressure selective catalytic reduction reactor and the booster; the long axis of the diesel engine, the long axis of the supercharger and the long axis of the high-pressure selective catalytic reduction reactor are parallel or form an included angle of less than 10 degrees, and the mixing pipe and the branch pipe are parallel or form an included angle of less than 10 degrees; a pair of insertion shafts are arranged on the inner wall of the pipe orifice at the tail end of the exhaust pipe of the diesel engine, and spherical metal nets are arranged on the insertion shafts in a matched mode. The arrangement of the spherical metal net ensures that the carbon deposition tends to be accumulated on the metal net more, the arrangement of the metal net does not influence the back pressure (or has little influence on the exhaust and can be ignored), the carbon deposition on the metal net can be replaced after a period of time is found out to be more through the arrangement of the inserted shaft, and the carbon deposition on the pipe wall of the exhaust pipe can be removed through rotating a circle during replacement; the supercharger is connected with the diesel engine, and for the prior art, similar to an exhaust gas turbocharger, exhaust gas is introduced into the supercharger, and the energy of the exhaust gas is utilized to realize supercharging. The adjacent pipe systems are connected through expansion joints and bent connecting pieces (commonly called as shrimp shell bends in the industry), and the expansion joints and the shrimp shell bends are alternately arranged. An expansion joint refers to a flexible element that effectively functions to compensate for axial deformation. For example, the expansion joint welded on the shell of the fixed tube-plate heat exchanger has large axial flexibility and easy deformation, can compensate the thermal expansion difference generated by the tube and the shell due to different wall temperatures, and reduces the axial load of the tube and the shell, thereby reducing the temperature difference stress of the tube, the tube plate and the shell and avoiding causing strength damage, instability damage and tube pull-out damage. The expansion joint has a plurality of types, and commonly used structures such as a wave shape, ring plate welding, a clamping shell type and the like, wherein the wave shape expansion joint is most widely applied, and the ring plate welding expansion joint is only suitable for normal pressure or low pressure occasions; the shrimp shell bend is composed of a plurality of straight pipe sections with oblique sections, the formed sections are generally two end sections and a plurality of middle sections, and the end sections are half of the middle sections. The shrimp shell bend is generally composed of a single section, two sections or more than three sections (the number of sections refers to the number of middle sections). The more the number of the joints, the more the elbow is smooth, and the smaller the resistance to the medium fluid. The exhaust pipe, the mixing pipe, the high-pressure selective catalytic reduction reactor, the branch pipe and the supercharger almost form a rectangular arrangement mode, so that a large amount of space is saved.
The process is as follows: high-pressure high-temperature waste gas (5bar550 ℃) from a gas collecting pipe of a main engine (namely a diesel engine) passes through a mixing pipe (urea is injected into the mixing pipe, and is injected into the mixing pipe through a urea supply device), then passes through an SCR reactor for treatment, returns to a supercharger of the main engine, and is exhausted out of the atmosphere; the key points of the arrangement are as follows: 1. the medium in the pipeline is high-pressure high-temperature waste gas, so the pipeline is made of 15CrMo (boiler heat-resistant steel), and the applicant evaluates the material by welding. The pressure in the pipeline is high, the temperature difference is large, the model selection of the expansion joint is entrusted to a host manufacturer to carry out thermal expansion stress calculation, and the length and the expansion coefficient of the expansion joint and the position of the fixed support are selected according to the calculated result. The shipyard carries out shipboard three-dimensional model modeling according to the primary calculation of a host manufacturer, the arrangement and the consideration of the on-site production requirements, the installation forms of the fixed support and the sliding support are mixed according to the design experience of the shipyard to meet the expansion requirement of the pipeline, and the shipyard completes the final arrangement; and returning the arrangement to a host manufacturer for final checking calculation, repeatedly demonstrating back and forth for multiple times, modifying the arrangement, finally completing the installation of the real ship, and satisfactorily completing the application of pilot run. The SCR reactor is arranged in front of a turbocharger, a catalyst with the operating temperature higher than 300 ℃ is adopted, heavy oil and low-sulfur oil are both suitable, the performance of the catalyst is reliable, and a great deal of use experience is provided for power stations and trucks; the Arragium sulfate does not generate, the catalyst has longer service life, does not need regeneration, and the auxiliary system is simple, the diesel engine performance influence is small, and the high load oil consumption is increased by only 0.5 g/KW.h. The bottom of the sliding support is fixed on a diesel engine placing platform on a ship, but the upper part of the sliding support is provided with a support body in a sliding way and is used for bearing the axial extension and contraction of the expansion joint (the fixed part and the sliding part are conventional technical means in the field and are not described in detail).
The further technical scheme is that the mixing pipe and the exhaust pipe are arranged vertically, the long axis of the diesel engine, the long axis of the supercharger and the long axis of the high-pressure selective catalytic reduction reactor are arranged in parallel, and the long axis of the high-pressure selective catalytic reduction reactor is perpendicular to the long axis of the mixing pipe.
The further technical proposal is that the supercharger, the mixing pipe and the high-pressure selective catalytic reduction reactor are fixedly connected with the diesel engine or the diesel engine placing platform through a fixed bracket; the expansion joint is connected with the diesel engine or the diesel engine placing platform through a sliding support.
The technical scheme is that the spherical diameter of a spherical metal net is matched with the inner diameter of the tail end pipe of the diesel engine exhaust pipe, an opening matched with an insertion shaft is formed in the spherical metal net, and the pair of insertion shafts comprises a fixed shaft and a telescopic shaft; the fixed axle is fixed on the terminal mouth of pipe inner wall of diesel engine blast pipe, and the telescopic shaft includes a pipe of fixing on the terminal mouth of pipe inner wall of diesel engine blast pipe and slides and set up the cylinder in the pipe, and the cylinder bottom an organic whole is equipped with circular limiting plate, the pipe mouth of pipe an organic whole be equipped with the ring baffle of limiting plate adaptation. The structure for treating carbon deposition is arranged, back pressure is not increased, and the design is ingenious (the diameter of the sphere refers to the diameter of the sphere).
The utility model has the advantages and the beneficial effects that: the spherical metal net is arranged, so that carbon deposition tends to gather on the metal net, the back pressure is not influenced (or the influence on exhaust is very little and can be ignored) by the arrangement of the metal net, the back pressure is not increased by the arrangement of the structure for treating the carbon deposition, and the design is ingenious. Through the arrangement of the inserted shaft, the metal net can be replaced after more carbon deposition is found at intervals, and the carbon deposition on the pipe wall of the exhaust pipe can be removed by rotating the inserted shaft for one circle; the exhaust pipe, the mixing pipe, the high-pressure selective catalytic reduction reactor, the branch pipe and the supercharger almost form a rectangular arrangement mode, so that a large amount of space is saved. The pressure in the pipeline is high, the temperature difference is large, the model selection of the expansion joint is entrusted to a host manufacturer to carry out thermal expansion stress calculation, and the length and the expansion coefficient of the expansion joint and the position of the fixed support are selected according to the calculated result; the pressure in the pipeline is high, the temperature difference is large, the model selection of the expansion joint is entrusted to a host manufacturer to carry out thermal expansion stress calculation, and the length and the expansion coefficient of the expansion joint and the position of the fixed support are selected according to the calculated result. The shipyard carries out shipboard three-dimensional model modeling according to the primary calculation of a host manufacturer, the arrangement and the consideration of the on-site production requirements, the installation forms of the fixed support and the sliding support are mixed according to the design experience of the shipyard to meet the expansion requirement of the pipeline, and the shipyard completes the final arrangement; and returning the arrangement to a host manufacturer for final checking calculation, repeatedly demonstrating back and forth for multiple times, modifying the arrangement, finally completing the installation of the real ship, and satisfactorily completing the application of pilot run. The SCR reactor is arranged in front of a turbocharger, a catalyst with the operating temperature higher than 300 ℃ is adopted, heavy oil and low-sulfur oil are both suitable, the performance of the catalyst is reliable, and a great deal of use experience is provided for power stations and trucks; the Arragium sulfate does not generate, the catalyst has longer service life, does not need regeneration, and the auxiliary system is simple, the diesel engine performance influence is small, and the high load oil consumption is increased by only 0.5 g/KW.h.
Drawings
Fig. 1 is a schematic diagram of a diesel engine exhaust system of a sawdust boat according to a first embodiment of the present invention;
FIG. 2 is a top view of FIG. 1;
figure 3 is an exploded view of the expansion joint and shrimp shell bend at the lower right hand corner of figure 2;
fig. 4 is a schematic view of a pipe orifice at the tail end of a diesel engine exhaust pipe in the second embodiment of the present invention;
FIG. 5 is a schematic view of the spherical metal mesh of FIG. 4;
fig. 6 is an enlarged schematic view of a portion near the cylinder in fig. 4.
In the figure: 1. a diesel engine; 2. an exhaust pipe; 3. a mixing tube; 4. a high pressure selective catalytic reduction reactor; 5. a supercharger; 6. an expansion joint; 7. bending the shrimp shell; 8. a branch pipe; 9. a spherical metal mesh; 10. fixing a bracket; 11. a sliding support; 12. a fixed shaft; 13. a circular tube; 14. a cylinder; 15. a limiting plate; 16. an annular baffle.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The first embodiment is as follows:
as shown in fig. 1 to 3, the utility model relates to a saw-dust boat diesel engine exhaust system, including diesel engine 1, the hybrid tube 3 that links to each other with diesel engine 1 blast pipe 2, the high pressure selective catalytic reduction reactor 4 that links to each other with hybrid tube 3 and the booster 5 that links to each other with high pressure selective catalytic reduction reactor 4, hybrid tube 3, high pressure selective catalytic reduction reactor 4, booster 5 set gradually along the exhaust direction, connect through a plurality of expansion joint 6 and shrimp shell bend 7 between blast pipe 2, hybrid tube 3, high pressure selective catalytic reduction reactor 4 and the booster 5, link to each other through branch pipe 8 between high pressure selective catalytic reduction reactor 4 and the booster 5; the long axis of the diesel engine 1, the long axis of the supercharger 5 and the long axis of the high-pressure selective catalytic reduction reactor 4 are parallel or form an included angle of less than 10 degrees, and the mixing pipe 3 and the branch pipe 8 are parallel or form an included angle of less than 10 degrees; the mixing pipe 3 and the exhaust pipe 2 are arranged vertically, the long axis of the diesel engine 1, the long axis of the supercharger 5 and the long axis of the high-pressure selective catalytic reduction reactor 4 are arranged in parallel, and the long axis of the high-pressure selective catalytic reduction reactor 4 is perpendicular to the long axis of the mixing pipe 3. The supercharger 5, the mixing pipe 3 and the high-pressure selective catalytic reduction reactor 4 are fixedly connected with the diesel engine 1 or the diesel engine 1 placing platform through a fixing support 10; the expansion joint 6 is connected with the diesel engine 1 or the placing platform of the diesel engine 1 through a sliding bracket 11.
Example two:
the difference from the first embodiment is that, as shown in fig. 4 to 6 (for convenience of illustration, the net-shaped surface of the spherical metal net is not shown in fig. 4), a pair of insertion shafts are arranged on the inner wall of the end nozzle of the exhaust pipe of the diesel engine, and the spherical metal net 9 is arranged on the insertion shafts in a matching way. The spherical diameter of the spherical metal net 9 is matched with the inner diameter of the tail end pipe of the diesel engine exhaust pipe, an opening matched with the inserting shaft is formed in the spherical metal net 9, and the pair of inserting shafts comprises a fixed shaft 12 and a telescopic shaft; the fixed shaft 12 is fixed on the inner wall of the tail end pipe opening of the diesel engine exhaust pipe, the telescopic shaft comprises a round pipe 13 fixed on the inner wall of the tail end pipe opening of the diesel engine exhaust pipe and a cylinder 14 arranged in the round pipe 13 in a sliding mode, a round limiting plate 15 is integrally arranged at the bottom of the cylinder 14, and an annular baffle 16 matched with the limiting plate 15 is integrally arranged at the pipe opening of the round pipe 13. The round pipe is internally provided with a spring, one end of the spring is fixedly connected to the limiting plate, and the other end of the spring is fixedly connected to the pipe wall of the exhaust pipe in the round pipe.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The exhaust system of the wood chip ship diesel engine is characterized by comprising a diesel engine, a mixing pipe connected with an exhaust pipe of the diesel engine, a high-pressure selective catalytic reduction reactor connected with the mixing pipe and a supercharger connected with the high-pressure selective catalytic reduction reactor, wherein the mixing pipe, the high-pressure selective catalytic reduction reactor and the supercharger are sequentially arranged along the exhaust direction; the long axis of the diesel engine, the long axis of the supercharger and the long axis of the high-pressure selective catalytic reduction reactor are parallel or form an included angle of less than 10 degrees, and the mixing pipe and the branch pipe are parallel or form an included angle of less than 10 degrees; a pair of insertion shafts are arranged on the inner wall of the pipe orifice at the tail end of the exhaust pipe of the diesel engine, and spherical metal nets are arranged on the insertion shafts in a matched mode.
2. The exhaust system of a wood chip ship diesel engine as claimed in claim 1, wherein the mixing pipe is perpendicular to the exhaust pipe, the long axis of the diesel engine, the long axis of the supercharger and the long axis of the high pressure selective catalytic reduction reactor are parallel, and the long axis of the high pressure selective catalytic reduction reactor is perpendicular to the long axis of the mixing pipe.
3. The exhaust system of the diesel engine of the wood chip ship as claimed in claim 2, wherein the supercharger, the mixing pipe and the high-pressure selective catalytic reduction reactor are fixedly connected with the diesel engine or the diesel engine placing platform through a fixed bracket; the expansion joint is connected with the diesel engine or the diesel engine placing platform through a sliding support.
4. The exhaust system of the diesel engine of the sawdust boat as set forth in claim 3, wherein said spherical metal net has a spherical diameter adapted to the inner diameter of the end pipe of the diesel engine exhaust pipe, and has an opening adapted to the insertion shaft, and the pair of insertion shafts comprises a fixed shaft and a telescopic shaft; the fixed axle is fixed on the terminal mouth of pipe inner wall of diesel engine blast pipe, and the telescopic shaft includes a pipe of fixing on the terminal mouth of pipe inner wall of diesel engine blast pipe and slides and set up the cylinder in the pipe, and the cylinder bottom an organic whole is equipped with circular limiting plate, the pipe mouth of pipe an organic whole be equipped with the ring baffle of limiting plate adaptation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921656146.6U CN210829447U (en) | 2019-09-30 | 2019-09-30 | Diesel engine exhaust system of wood chip ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921656146.6U CN210829447U (en) | 2019-09-30 | 2019-09-30 | Diesel engine exhaust system of wood chip ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210829447U true CN210829447U (en) | 2020-06-23 |
Family
ID=71271032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921656146.6U Withdrawn - After Issue CN210829447U (en) | 2019-09-30 | 2019-09-30 | Diesel engine exhaust system of wood chip ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210829447U (en) |
-
2019
- 2019-09-30 CN CN201921656146.6U patent/CN210829447U/en not_active Withdrawn - After Issue
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20060053779A1 (en) | Joint for an engine exhaust system component | |
| CN103147832A (en) | Corrugated pipe combined structure for diesel engine | |
| CN204851408U (en) | Indulge and put engine close coupling exhaust manifold subassembly | |
| CN210829447U (en) | Diesel engine exhaust system of wood chip ship | |
| CN110552774B (en) | Exhaust system of wood chip ship diesel engine | |
| CN107269357A (en) | Exhausted gas post-processing system and internal combustion engine | |
| CN202832734U (en) | Engineering machinery engine exhaust pipe structure | |
| CN204152617U (en) | A kind of close coupling gas exhaust manifold and catalytic converter assembly | |
| CN203879596U (en) | Automobile exhaust pipe structure | |
| CN204357539U (en) | Gas auxiliary internal-combustion engine SCR is with the shower nozzle of atomizing effect | |
| RU72274U1 (en) | EXHAUST MANIFOLD FOR INTERNAL COMBUSTION ENGINE | |
| CN207229213U (en) | Diesel engine after treatment device | |
| CN210599179U (en) | Quick-insertion type silencer for automobile turbocharging | |
| CN209743016U (en) | Three-dimensional exhaust elbow | |
| CN206875021U (en) | A kind of loop-type bellows | |
| CN209743017U (en) | High-efficient heat preservation exhaust return bend | |
| CN201096006Y (en) | 2.4 liter CBR petrolic exhaust gas manifold | |
| CN207212452U (en) | Diesel engine after treatment device | |
| CN213392335U (en) | Connecting piece and exhaust system | |
| CN111617635A (en) | Novel denitration reductant directly spout and mix device | |
| CN201461145U (en) | Pipe for exhaust gas recirculation system | |
| CN203258248U (en) | Automobile production line air duct connector | |
| CN213360224U (en) | Divide and arrange welding point formula vortex rear connection pipe welded structure | |
| RU2242622C2 (en) | Welded manifold of internal combustion engine | |
| CN211040088U (en) | Desulfurization, denitration bellows structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200623 Effective date of abandoning: 20231226 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20200623 Effective date of abandoning: 20231226 |