CN208347877U - A kind of monolith honeycomb catalysts intake elbow and automobile exhaust system - Google Patents
A kind of monolith honeycomb catalysts intake elbow and automobile exhaust system Download PDFInfo
- Publication number
- CN208347877U CN208347877U CN201820612363.4U CN201820612363U CN208347877U CN 208347877 U CN208347877 U CN 208347877U CN 201820612363 U CN201820612363 U CN 201820612363U CN 208347877 U CN208347877 U CN 208347877U
- Authority
- CN
- China
- Prior art keywords
- elbow
- connecting portion
- intake
- intake elbow
- exhaust system
- 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.)
- Expired - Fee Related
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 27
- 238000010276 construction Methods 0.000 claims abstract 2
- 238000007789 sealing Methods 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 17
- 230000008569 process Effects 0.000 abstract description 14
- 238000003466 welding Methods 0.000 abstract description 9
- 230000035939 shock Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 33
- 238000012546 transfer Methods 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000012545 processing Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000009966 trimming Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001868 water Inorganic materials 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a kind of monolith honeycomb catalysts intake elbow and automobile exhaust systems, wherein intake elbow includes the elbow body with inlet end and outlet side, the intake elbow further includes the first connecting portion that the inlet end of the elbow body is arranged in and is used to connect with automobile engine, the outlet side that the elbow body is arranged in is used for the second connecting portion that connect with catalyst converter and the mounting portion for being used to install lambda sensor in the elbow body is arranged in, the elbow body, the first connecting portion, the second connecting portion and the mounting portion are monolithic construction.The intake elbow structure is simple, intake elbow is integrally formed, has the characteristics that the rigidity of structure is high, precision is good, Thickness Distribution is uniform, fatigue endurance and thermal shock resistance properties are excellent, avoids welding defect, so that part quality is obviously improved, conducive to the process and assemble of further assembly product.
Description
Technical field
The utility model relates to automotive parts manufacturing technologies, and in particular to a kind of monolith honeycomb catalysts intake elbow
And automobile exhaust system.
Background technique
Current automobile industry constantly pursues more significant energy conservation and emission reduction effect, with the implementation of six discharge standard of state, row
The structure optimization of gas system is also imperative.Realize the changing effect that preferably discharges pollutants, it is necessary to by ternary catalyzing unit 200
As close to the exhaust outlet of 1 of automobile engine 00, oxynitrides is realized by higher delivery temperature (700 DEG C or so)
Harmless treatment, by the pernicious gases such as CO, HC and NOx of vehicle exhaust discharge by aoxidize and reduction be changed into it is harmless
Carbon dioxide, water and nitrogen.
200 diameter of ternary catalyzing unit is much larger than the diameter of the exhaust outlet of 1 of automobile engine 00, while exhaust outlet direction is approximate
Horizontal direction, ternary catalyzing unit 200 is towards rear ramp, the angle of the two structure left and right in 90 °, so as to cause the ternary of both connections
1 ' of intake elbow of catalyst converter 200 has the structure of approximate " snail " shape, and one end is big, one end is small, and has a very little radius
Bending section, thus guarantee the both ends of 1 ' of intake elbow as close possible to.This structure brings very big choose to bent tube technique
War, therefore usually weld integral 1 ' of intake elbow in engineering again to semi-stamping with plate, as shown in Figure 1.Double of Welder
There is skill the potential quality such as port is non-round, the preceding assembling of welding is inconvenient, the loose gas leakage of welding, weld seam position thermal shock seriously corroded to ask
Topic.Moreover, 2 ' of flange that is connect with automobile engine need by osculum end that 1 ' of intake elbow is welded to after machining again with
1 of automobile engine 00 connects, and welding deformation causes joint seal of flanges face precision to be deteriorated.Lambda sensor connecting flange equally passes through
Need 3 ' of machining attaching nut to be then welded at the installation lambda sensor connecting flange of 1 ' of intake elbow, equally exist compared with
High processing cost and Welding Problems.
Utility model content
The purpose of this utility model is to provide a kind of monolith honeycomb catalysts intake elbow for the problems of the prior art.
In order to achieve the above objectives, the technical solution adopted in the utility model is:
A kind of monolith honeycomb catalysts intake elbow, including the elbow body with inlet end and outlet side, the air inlet is curved
Pipe further include be arranged in the elbow body inlet end be used for connect with automobile engine first connecting portion, setting described
The second connecting portion and be arranged in the elbow body for installing oxygen that the outlet side of elbow body is used to connect with catalyst converter
The mounting portion of sensor, the elbow body, the first connecting portion, the second connecting portion and the mounting portion are monoblock type
Structure.
Preferably, between the central axis of the inlet end of the elbow body and the central axis of the outlet side
Angle is not more than 90 degree.
Preferably, the first connecting portion is the Flange that the inlet end of the elbow body is arranged in.
Preferably, the second connecting portion is the flaring limited step that the outlet side of the elbow body is arranged in.
Preferably, the mounting portion is the flanging nut being arranged in the elbow body.
The utility model also provides a kind of automobile exhaust system, and the automobile exhaust system has as described in any of the above-described
Intake elbow.
Preferably, the automobile exhaust system further includes the company for connecting the intake elbow Yu the automobile engine
Binding structure.
Further, the automobile engine includes connecting flange, and the connection structure includes for connecting described first
The clip of interconnecting piece and the connecting flange, the clip use V-type clip, and the first connecting portion and the connecting flange are equal
It is fastened in the V-groove of the V-type clip.
Further, the connection structure further includes the faying face that the intake elbow Yu the automobile engine is arranged in
Between sealing structure.
Further, the sealing structure includes sealing ring, and the automobile engine includes for curved with the air inlet
The connecting flange of pipe connection, is provided with seal groove on the end face of the connecting flange, the sealing ring is located in the seal groove.
Due to the application of the above technical scheme, the utility model has the advantage that this is practical new compared with prior art
The monolith honeycomb catalysts intake elbow structure of type is simple, and intake elbow is integrally formed, with the rigidity of structure is high, precision is good, wall thickness
It is evenly distributed, the feature that fatigue endurance and thermal shock resistance properties are excellent, avoids welding defect, so that part quality is obviously improved,
Conducive to the process and assemble of further assembly product.
Detailed description of the invention
Attached drawing 1 is the exploded view of catalyst converter intake elbow in the prior art；
Attached drawing 2 is the structural schematic diagram of the monolith honeycomb catalysts intake elbow of the utility model；
Attached drawing 3 is the processing process figure of the monolith honeycomb catalysts intake elbow of the utility model；
Attached drawing 4 is the structural schematic diagram of the monolith honeycomb catalysts intake elbow hot gas bulging process equipment of the utility model；
Attached drawing 5 is the structural schematic diagram that intake elbow connects automobile engine and catalyst converter；
Attached drawing 6 is the structural schematic diagram when monolith honeycomb catalysts intake elbow of the utility model is connect with automobile engine
(enlarged drawing).
Wherein: 1, elbow body；2, first connecting portion；3, second connecting portion；4, mounting portion；5, clip；6, sealing ring.
10, heating furnace conveyer system；20, transfer robot；30, hot gas expansion shape forming device；301, hot gas expansion shape forming
Mold；302, hot gas bulging power device；40, discharge transfer station；
A, straight tube blank；B, initial pipe；C, swollen rear pipe；D, rear pipe is cut；E, pipe after flange；
100, automobile engine；101, connecting flange；200, catalyst converter.
Specific embodiment
The technical solution of the utility model is further elaborated with reference to the accompanying drawing.
As shown in Fig. 2, the monolith honeycomb catalysts intake elbow of the utility model include elbow body 1, first connecting portion 2,
Second connecting portion 3 and mounting portion 4.
Elbow body 1 is overall structure, avoids elbow body 1 in the prior art and plate is used to weld institute again to semi-stamping
The potential quality such as bring port is non-round, the preceding assembling of welding is inconvenient, the loose gas leakage of welding, weld seam position thermal shock seriously corroded are asked
Topic.Elbow body 1 has inlet end and outlet side, and the diameter of inlet end is less than the diameter of outlet side, the central axis of inlet end
Angle between the central axis of outlet side is not more than 90 degree.
The inlet end of elbow body 1 is arranged in first connecting portion 2, for connecting with 1 of automobile engine 00.Second connecting portion
3 are arranged in the outlet side of elbow body 1, for connecting with catalyst converter 200.Mounting portion 4 is arranged in elbow body 1, for pacifying
Fill lambda sensor.Elbow body 1, first connecting portion 2, second connecting portion 3 and mounting portion 4 are overall structure, in this way, can avoid
Now each component needs to be welded in elbow body 1 and due to welding generated quality problems in the prior art.
In the present embodiment, first connecting portion 2 is the Flange that the inlet end of elbow body 1 is arranged in, second connecting portion 3
For be arranged in elbow body 1 outlet side flaring limited step, mounting portion 4 is the flanging nut being arranged in elbow body 1.
The process for machining and manufacturing of the intake elbow is introduced in detail below, process for machining and manufacturing flow chart is detailed in Fig. 3,
Concrete technology flow process is as follows:
(1) blanking
The raw material for manufacturing the intake elbow are straight round tube blank, and round tube blank is cut into the straight tube blank of certain length
Expect A；
(2) bend pipe
CNC tube bending machine is used to be bent to obtain greatly to it in the cold state straight tube blank A obtained in step (1)
The elbow material of bending radius, this is initial pipe B, and the bending radius of the initial pipe B is greater than practical intake elbow at this time
Bending radius, the diameter of the pipe of the initial pipe B are less than the diameter of practical intake elbow；
(3) hot gas bulging
Initial pipe B is sent to progress hot gas bulging process in hot gas bulging process equipment, to obtain and practical air inlet
The elbow material of the identical small-bend radius of the bending radius of bend pipe, this is swollen rear pipe C；
(4) trimming, punching
The straight part excision of two ends of pipe C, leaves behind elbow part, at this time the pipe of the elbow part after will be swollen
Diameter it is identical as the diameter of practical intake elbow, on elbow part install lambda sensor position position punching, cut
Pipe D afterwards；
(5) flange, flaring
Flange processing is carried out to the small end and puncture site for cutting rear pipe D, and the big end for cutting rear pipe D is carried out at flaring
Reason, obtains pipe E after flange；
(6) tapping
The screw thread to match with lambda sensor mounting flange is processed at the flange of puncture site, to install lambda sensor,
Product after tapping carries out the auxiliary processes such as deburring, cleaning again.
So just complete the processing and manufacturing of the intake elbow.The hot gas bulging process being previously mentioned in above-mentioned steps (3) is set
It is standby as shown in figure 4, it mainly includes such as lower component:
Hot gas bulging process equipment includes heating furnace conveyer system 10, transfer robot 20, hot gas expansion shape forming device 30
And discharging transfer station 40.
Heating furnace conveyer system 10 is used to heat initial pipe B, in the present embodiment, the highest of heating furnace conveyer system 10
Heating temperature is not less than 1000 DEG C.
Hot gas expansion shape forming device 30 is mainly shaped using Fluid pressure, by Fluid pressure bulging by long radius
Elbow material be processed into the elbow material of small-bend radius.Specifically, hot gas expansion shape forming device 30 includes curved for placing
The hot gas expansion shape forming mold 301 of blank and for be located at hot gas expansion shape forming mold 301 in elbow material inner cavity
The hot gas bulging power device 302 of middle pressurising bulging.In the present embodiment, fluid media (medium) used by hot gas bulging is gas, heat
Inflatable shape power device 302 includes being inflated in the inner cavity of elbow material to generate the compressed air source unit of air pressure.Certainly, hot gas bulging
Liquid, such as oil or water can also be used in used fluid media (medium).
Discharging transfer station 40 is for transmitting swollen rear pipe C.
Transfer robot 20 is for carrying elbow material, and transfer robot 20 has gripping apparatus resistant to high temperature, in order to add
Initial pipe B after heat in the condition of high temperature is transported to progress hot gas bulging in hot gas expansion shape forming device 30.
Initial pipe B formed after hot gas bulging process equipment bulging it is swollen after pipe C workflow it is as follows:
(1) firstly, being heated initial pipe B by heating furnace conveyer system 10, heating temperature to 930 DEG C or so rear heat preservations
3 minutes or so, initial pipe B is then pushed out heating furnace conveyer system 10, the initial pipe B is in very soft red at this time
Warm status；
(2) transfer robot 20 passes through heat-resisting robot gripping apparatus for heated initial pipe B rapid transport to hot gas
In expansion shape forming device 30；
(3) initial pipe B is placed into hot gas expansion shape forming mold 301, by hot gas bulging power device 302 to position
Inflation generates pressure in the inner cavity of initial pipe in hot gas expansion shape forming mold 301, due to the temperature of initial pipe B at this time
It is higher, so that the temperature of the gas for bulging also increases rapidly, increase the bending section diameter of initial pipe B by hot gas bulging
Add, bending radius reduction, thus obtain the elbow material of small-bend radius, major diameter, i.e., swollen rear pipe C；
(4) swollen rear pipe C is transported in discharging transfer station 40 by transfer robot 20；
(5) by discharging transfer station 40 will it is swollen after pipe C be transmitted to trimming, carry out trimming at punching station and punching is grasped
Make.
The intake elbow mainly passes through the manufacture of hot gas bulging processing technology, which can realize the primary of intake elbow
Overall thermal inflatable shape, it is integrally formed after product structure rigidity it is high, precision is good, Thickness Distribution is uniform, avoid rupture, corrugation etc.
Forming defects, and one-piece parts manufacturing process is few, at low cost.Meanwhile passing through transfer robot in hot gas bulging forming process
20 automatic loading/unloadings, the initial pipe B after auxiliary transhipment heating, improve the stability of production.It is surveyed through engineer testing and product
Test result shows that this kind of technological feasibility is good, and product quality and performances are substantially improved, and meets thermal shock test, durable examination
The relevant industries verification test standard such as test.
The utility model also discloses a kind of automobile exhaust system, which includes catalyst converter 200, catalyst converter
200 are connect by above-mentioned intake elbow with 1 of automobile engine 00, as shown in Fig. 5 and Fig. 6.
The automobile exhaust system further includes the connection structure for connecting intake elbow and 1 of automobile engine 00, as shown in fig. 6,
1 of automobile engine 00 includes connecting flange 101, which includes clip 5, and clip 5 is for connecting the first of intake elbow
The connecting flange 101 of interconnecting piece 2 and 1 of automobile engine 00, in the present embodiment, clip 5 uses V-type clip, and when connection, first connects
Socket part 2 and connecting flange 101 are fastened in the V-groove of V-type clip.
The connection structure further includes the sealing structure being arranged between intake elbow and the faying face of 1 of automobile engine 00,
In the present embodiment, sealing structure uses sealing ring 6.
Specifically, being provided with sealing ring 6 on the end face of connecting flange 101, sealing ring 6 is located in the seal groove.For into
One step improves sealing effect, limited step is provided in first connecting portion 2, sealing ring 6 is fastened on the limited step simultaneously.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique
Personage can understand the content of the utility model and be implemented, do not limit the protection scope of the present invention,
All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover in the protection scope of the utility model
It is interior.
Claims (10)
1. a kind of monolith honeycomb catalysts intake elbow, including the elbow body with inlet end and outlet side, it is characterised in that: institute
State intake elbow further include be arranged in the elbow body inlet end be used for connect with automobile engine first connecting portion, set
It sets the second connecting portion for being used to connect with catalyst converter in the outlet side of the elbow body and is arranged in the elbow body and use
In the mounting portion of installation lambda sensor, the elbow body, the first connecting portion, the second connecting portion and the mounting portion
For monolithic construction.
2. monolith honeycomb catalysts intake elbow according to claim 1, it is characterised in that: the elbow body it is described into
Angle between the central axis at gas end and the central axis of the outlet side is not more than 90 degree.
3. monolith honeycomb catalysts intake elbow according to claim 1, it is characterised in that: the first connecting portion is setting
In the Flange of the inlet end of the elbow body.
4. monolith honeycomb catalysts intake elbow according to claim 1, it is characterised in that: the second connecting portion is setting
Flaring limited step in the outlet side of the elbow body.
5. monolith honeycomb catalysts intake elbow according to claim 1, it is characterised in that: the mounting portion is setting in institute
State the flanging nut in elbow body.
6. a kind of automobile exhaust system, it is characterised in that: have intake elbow according to any one of claims 1 to 5.
7. automobile exhaust system according to claim 6, it is characterised in that: the automobile exhaust system further includes for connecting
Connect the connection structure of the intake elbow Yu the automobile engine.
8. automobile exhaust system according to claim 7, it is characterised in that: the automobile engine includes connecting flange,
The connection structure includes the clip for connecting the first connecting portion and the connecting flange, and the clip uses V-type card
Hoop, the first connecting portion and the connecting flange are fastened in the V-groove of the V-type clip.
9. automobile exhaust system according to claim 7, it is characterised in that: the connection structure further includes being arranged described
Sealing structure between intake elbow and the faying face of the automobile engine.
10. automobile exhaust system according to claim 9, it is characterised in that: the sealing structure includes sealing ring, described
Automobile engine includes the connecting flange for connecting with the intake elbow, and sealing is provided on the end face of the connecting flange
Slot, the sealing ring are located in the seal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820612363.4U CN208347877U (en) | 2018-04-26 | 2018-04-26 | A kind of monolith honeycomb catalysts intake elbow and automobile exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820612363.4U CN208347877U (en) | 2018-04-26 | 2018-04-26 | A kind of monolith honeycomb catalysts intake elbow and automobile exhaust system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208347877U true CN208347877U (en) | 2019-01-08 |
Family
ID=64887534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820612363.4U Expired - Fee Related CN208347877U (en) | 2018-04-26 | 2018-04-26 | A kind of monolith honeycomb catalysts intake elbow and automobile exhaust system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208347877U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343494A (en) * | 2018-04-26 | 2018-07-31 | 清华大学苏州汽车研究院（相城） | A kind of monolith honeycomb catalysts intake elbow and automobile exhaust system |
-
2018
- 2018-04-26 CN CN201820612363.4U patent/CN208347877U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108343494A (en) * | 2018-04-26 | 2018-07-31 | 清华大学苏州汽车研究院（相城） | A kind of monolith honeycomb catalysts intake elbow and automobile exhaust system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7334334B2 (en) | Automotive exhaust component and method of manufacture | |
| CN208347878U (en) | A kind of monolith honeycomb catalysts intake elbow hot gas bulging process equipment | |
| US5482681A (en) | Catalytic converter for motor vehicles | |
| US6427440B1 (en) | Built-up airgap-insulated exhaust manifold of a motor vehicle and method for producing it | |
| WO2004023017A1 (en) | Metal bellows tube, method of producing the same, and flexible tube for high-pressure fluid | |
| CN208347877U (en) | A kind of monolith honeycomb catalysts intake elbow and automobile exhaust system | |
| US7685714B2 (en) | Automotive exhaust component and process of manufacture | |
| US7252808B2 (en) | Automotive exhaust component and method of manufacture | |
| US20050072143A1 (en) | Air-gap manifold | |
| EP1990514A1 (en) | Exhaust tube interface for an exhaust treatment device | |
| CN108343494A (en) | A kind of monolith honeycomb catalysts intake elbow and automobile exhaust system | |
| CN210242495U (en) | Heat exchanger | |
| US7323145B2 (en) | Automotive exhaust component and method of manufacture | |
| CN112780877B (en) | B-type sleeve for repairing girth weld defects between three-way branch pipe and butt-joint steel pipe and mounting method thereof | |
| CN104690108B (en) | A kind of tubular type stainless steel manifold manufacture method | |
| CN108397266A (en) | A kind of monolith honeycomb catalysts intake elbow hot gas bulging process equipment and processing technology | |
| CN105537790A (en) | Process for welding exhaust manifolds and flange | |
| CN111219238B (en) | Method and system for manufacturing exhaust gas apparatus | |
| CN113909817B (en) | Processing technology of low-smoke muffler assembly | |
| CN111992029A (en) | SCR denitration heat exchanger flue gas preheating device and SCR reactor | |
| CN212359906U (en) | Silencer | |
| CN210768995U (en) | Steel pipe of exhaust pipe | |
| CN218992684U (en) | Process pipeline sweeps connecting device | |
| CN202215872U (en) | Corrugated pipe flexible hinge for vehicle | |
| CN210829447U (en) | Diesel engine exhaust system of wood chip ship |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190108 Termination date: 20200426 |