CN208845717U - A kind of high temperature pressure seal device for the sealing of gas-liquid two-phase - Google Patents
A kind of high temperature pressure seal device for the sealing of gas-liquid two-phase Download PDFInfo
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- CN208845717U CN208845717U CN201821211375.2U CN201821211375U CN208845717U CN 208845717 U CN208845717 U CN 208845717U CN 201821211375 U CN201821211375 U CN 201821211375U CN 208845717 U CN208845717 U CN 208845717U
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Abstract
The utility model relates to a kind of high temperature pressure seal devices for the sealing of gas-liquid two-phase, including front tube, convex surface step flange, gasket assembly, concave surface step flange, pipe and V-type clip assembly afterwards, the front tube is fixedly connected with the limited step of convex surface step flange, the rear pipe is fixedly connected with the limited step of concave surface step flange, gasket general assembly the long seam allowance of convex surface step flange welding assembly root and formed interference fit fix, the sealing surface step of convex surface step flange and concave surface step flange is pressed on gasket assembly, pretightning force step to convex surface step flange and concave surface step flange is compacted to flange face fitting, V-groove clip assembly is nested with the trapezoidal junction being collectively formed on the flange inclined-plane of convex surface step flange and concave surface step flange.Have the advantages that low cost, guarantee sealing, it is easy to assembly it is time saving, can automatic centering, can compensate that manufacture deviation, to be able to achieve gasket preassembled.
Description
Technical field
The invention patent relates to a kind of high temperature pressure seal devices for the sealing of gas-liquid two-phase.
Background technique
State IV, state V, state VI emission regulation in exhaust contaminant (mainly particle and oxynitrides NOx) limit
Value reduces many compared with national Ⅲ emission regulation.It is difficult to realize simultaneously in engine and reduces above two exhaust contaminant, because
This SCR system, which becomes, meets one of state IV, the strategy of emission regulation of state V, and nitrogen oxidation in exhaust contaminant can be effectively reduced
The content for closing object, makes the exhaust contaminant of engine meet the emission regulation demands of state IV, state V, state VI.
With the extensive application of SCR technology, the aqueous solution of urea as reducing agent needs to spurt into gas exhaust piping in advance
It is sufficiently mixed uniformly with exhaust gas, for redox reaction occurs with NOx on preprocessor carrier.If before preprocessor
Leakage, which occurs, just will affect preprocessor transformation efficiency, while urea occurs in junctions such as pipeline, bellows and preprocessors
Crystallization.But existing both sides' type plane face flange adds gasket structure and double round plane face flanges that gasket structure is added all to be unable to satisfy gas phase
The two-phase of high-temperature gas and liquid phase aqueous solution of urea seals, and there are following technical problems:
1. both sides' type plane face flange sealing structure, square plane face flange and pipeline can generate welding deformation when welding and cause flange
Warping Effect planeness of flange.Causing it to tighten position in the bolt of quadrangle may be implemented to seal, and the position between bolt can not
Guarantee sealing；
2. pair round plane face flange sealing structure, round plane face flange is if being connected by screw bolts mode in circumferencial direction needs
Uniformly distributed six to eight group bolt and nuts, could preferably guarantee to seal.When influencing system cost and increasing assembly difficulty, extend assembly
Between；
3. pair round plane face flange sealing structure, the round plane face flange such as round V-groove clamp connection mode of use, then two
Gasket between round plane face flange can not be positioned in assembly, cause practical sealing surface and pre-designed sealing surface to deviate, Wu Fabao
Card sealing；
4. existing square, round plane face flange sealing structure all not can guarantee two flanges it is mutual to neutrality, lead to reality
Sealing surface and design sealing surface offset, cause assembly prestress, increase assembly difficulty, not can guarantee sealing；
Rigging error when 5. existing square, round plane face flange sealing structure can not all compensate assembly between two flanges, such as
Generating rigging error then needs to manually adjust after dismantling again, or even is unable to complete assembly；
6. existing square, round plane face flange sealing structure require longer assembly time, fastening six to eight is generally required
Group bolt and nut, or even need to manually adjust part manufacturing, assembling deviation, it is time-consuming and laborious；
7. the gasket assembly of existing square, round plane face flange sealing structure all has difficulties, gasket need to be filled in flowing water
It is assembled on wiring, gasket centering is held while assembly flange, to hole location.It cannot achieve gasket and flange pre-assembled,
Influence assembly belt productive temp.
Summary of the invention
The purpose of the utility model is to provide a kind of high temperature pressure seal devices for the sealing of gas-liquid two-phase, have letter
Single, low cost, guarantee sealing, it is easy to assembly it is time saving, can automatic centering, manufacture deviation can be compensated, be able to achieve gasket pre-assembled
The advantages of.
The purpose of this utility model is achieved through the following technical solutions:
A kind of high temperature pressure seal device for the sealing of gas-liquid two-phase, including front tube 1, convex surface step flange 2, gasket
Assembly 3, concave surface step flange 4, rear pipe 5 and V-type clip assembly 6, the limited step of the front tube 1 and convex surface step flange 2
12 are fixedly connected, and the rear pipe 5 is fixedly connected with the limited step 12 of concave surface step flange 4, and gasket assembly 3 is assemblied in convex
The root of the long seam allowance 7 of 2 welding assembly of face step flange simultaneously forms interference fit fixation, convex surface step flange 2 and concave surface step
The sealing surface step 9 of flange 4 is pressed on gasket assembly 3, until the pretightning force of convex surface step flange 2 and concave surface step flange 4
Step 10 is compacted to flange face fitting, and V-groove clip assembly 6 is nested with the method in convex surface step flange 2 and concave surface step flange 4
The trapezoidal junction that blue inclined-plane is collectively formed.
As the utility model, more preferably technical solution, the long seam allowance 7 are that length is greater than 10mm, and root thickness is greater than
3mm, outside inclined-plane band inclined 87 ° of inclination angles inwardly.
As the utility model more preferably technical solution, the height of the convex surface step flange 2 and concave surface step flange 4
It is 25mm, wall thickness is greater than 3mm, Ying Caiyong stainless steel material.
As the utility model more preferably technical solution, the flange of the convex surface step flange 2 and concave surface step flange 4
Face thickness is greater than 5mm, each step different there are two height on flange face.Sealing surface step 9 close to flange axle center exceeds method
Blue face 1mm, the pretightning force step 10 far from flange axle center exceed flange face 2mm.
As the utility model, more preferably technical solution, 3 outer diameter of gasket assembly are greater than outside sealing surface step 9
Diameter, while being less than 10 internal diameter of pretightning force step.
As the utility model, more preferably technical solution, the thickness of the gasket assembly 3 are greater than convex surface step flange 2
Gap when with the fitting of 4 pretightning force step 10 of concave surface step flange, between sealing surface step 9.More preferably as the utility model
Technical solution, the sealing device is directional, and convex surface step flange 2 is in the upstream of air current flow direction, concave surface benching tunnelling method
Orchid 4 is in downstream.
It has the beneficial effect that:
The advantages of the utility model be simple, low cost, guarantee sealing, it is easy to assembly it is time saving, can automatic centering, can compensate
Manufacture deviation is able to achieve gasket pre-assembled, and high temperature (550 DEG C), the exhaust gas and urea droplets of high pressure (50kPa) may be implemented
Uniformly by sealing structure, leakage and local urea crystals are not generated.
Detailed description of the invention
Fig. 1 is the exploded view of the utility model；
Fig. 2 is the internal structure cross-sectional view of the utility model.
Specific embodiment
Below by specific embodiment and in conjunction with attached drawing, the utility model is described in more detail.
The high temperature pressure seal device of the gas-liquid two-phase sealing of the utility model is cascaded structure, directional.It is especially suitable
It is sealed for the high-temp waste gas for having pressure of vehicle application SCR post-processing technology, urea droplets gas-liquid two-phase, it can be to avoid urea
Leakage solves the industry problems of automobile urea leakage crystallization.It can also apply in other gases, liquid two-phase high temperature and pressure simultaneously
In the system of seal request.
As illustrated in fig. 1 and 2, a kind of high temperature pressure seal device for the sealing of gas-liquid two-phase provided by the utility model,
It is described including front tube 1, convex surface step flange 2, gasket assembly 3, concave surface step flange 4, rear pipe 5 and V-type clip assembly 6
Front tube 1 is fixedly connected with the limited step 12 of convex surface step flange 2, the limited step of the rear pipe 5 and concave surface step flange 4
12 are fixedly connected, and gasket assembly 3, which is assemblied in the root of the long seam allowance 7 of 2 welding assembly of convex surface step flange and forms interference, matches
It closes and fixes, the sealing surface step 9 of convex surface step flange 2 and concave surface step flange 4 is pressed on gasket assembly 3, until convex surface platform
The pretightning force step 10 of rank flange 2 and concave surface step flange 4 is compacted to flange face fitting, and V-groove clip assembly 6 is nested with convex
The trapezoidal junction that the flange inclined-plane of face step flange 2 and concave surface step flange 4 is collectively formed.The long seam allowance 7 is length
Greater than 10mm, root thickness is greater than 3mm, outside inclined-plane band inclined 87 ° of inclination angles inwardly.
The course of work of the utility model is as follows:
The high-temperature exhaust air of engine is exported by exhaust pipe and is sufficiently mixed hydrolysis with the urea liquid sprayed by urea nozzle
Afterwards, it is imported in the utility model by front tube 1, as shown in Fig. 2, airflow direction is from 2 effluent of convex surface step flange to concave surface step
4 side of flange.The high-temp waste gas and urea droplets imported by front tube 1 passes sequentially through convex surface step flange 2, concave surface step flange 4
Other directions are imported by rear pipe 5.Wherein exhaust gas is directed to concave surface step flange 4 by the long seam allowance 7 of convex surface step flange 2
In, wherein exhaust gas and urea droplets enter sealing labyrinth structure 8 with the direction of air-flow positive direction contrary as leakage need to prolong, and close
The sealing surface that cover step 9 and gasket assembly 3 are formed stops, and avoids leaking.It is cooperated using step flange, wherein convex surface
7 length of long seam allowance of step flange 2 is maintained at 10mm or more, to mesh such as neutrality, fixing seal pads between playing guiding, guaranteeing flange
's.The long seam allowance 7 of convex surface step flange 2 is connect with concave surface step flange 4 by long 7 grafting form of seam allowance, long seam allowance 7 and concave surface
Step flange 4 is clearance fit, as long as long seam allowance 7 protrudes into concave surface step flange 4 when assembly, guiding and centering may be implemented
Effect；Long seam allowance 7 is 87 ° of inclination angles of inclined-plane band, not only can guarantee long 7 intensity of seam allowance but also had been avoided that caused by gradient is insufficient and has assembled card
It is stagnant.Such as there is dimensional discrepancy and angular deviation when assembly, can be realized after long seam allowance 7 protrudes into concave surface step flange 4 certainly
Action-oriented and centering；Cooperation between the 2 long seam allowance 7 with inclined-plane of convex surface step flange and gasket assembly 3 is used from clearance fit
It is transitioned into interference fit form, i.e., long seam allowance 7 is before assembly clearance fit with gasket assembly 3, when gasket assembly 3 is inserted in
It is interference fit behind long 7 root of seam allowance, to guarantee that the not play of gasket assembly 3, realization gasket assembly 3 are pre- with long seam allowance 7
Assembly.Guarantee that gasket assembly 3, to neutrality, guarantees that 3 surface pressure of gasket assembly is equal with long 7 convex surface step flange of seam allowance simultaneously
It is even, it does not press partially.
The sealing of the utility model is total to by the step of convex surface step flange 2 and concave surface step flange 4 and gasket assembly 3
With what is formed, it is simple, effectively, be easily achieved.Convex surface step flange 2 and concave surface step flange 4 are double step structure, that is, include
Sealing surface step 9 and pretightning force step 10.Pretightning force step 10 is higher than sealing surface step 9, reserves when sealing surface step 9 is processed
Two steps can just be separated and form gasket flow cavity 11 in assembly by escape, on the one hand guarantee gasket compression
Deformed part can have a part compensation space, on the other hand guarantee boss sealing surface size and sealing surface contact area always with
Design requirement is consistent, and gasket assembly 3 and sealing surface step 9 form sealing surface.
The gasket assembly 3 is designed as circular ring shape, is made of interior metal skeleton and overcoating nonmetallic materials.Sealing
Pad 3 path of assembly and the long seam allowance 7 of convex surface step flange 2 form the size that interference fit is transitioned by gap, and gasket assembly 3 is big
Diameter is designed as the major diameter that gasket is greater than sealing surface step 9, to guarantee the size of design sealing surface by the sealing surface that is machined
Step 9 is realized.The flange face thickness of convex surface step flange 2 and concave surface step flange 4 is greater than 5mm, and each on flange face there are two high
Spend different steps.Wherein the first step close to flange axle center exceeds flange face 1mm, is sealing surface step 9, wherein far from method
The second step in blue axle center exceeds flange face 2mm, is pretightning force step 10.The design thickness of gasket assembly 3 is greater than convex surface platform
Gap when rank flange 2 and 4 pretightning force step 10 of concave surface step flange are bonded, between sealing surface step 9.It should ensure that and be higher than gap
20%~50%.Device provides enough sealing surface pressures by the compression and back elastic force of gasket assembly 3.Gasket assembly 3
Outer diameter is greater than 9 outer diameter of sealing surface step, therefore the area of sealing surface is by the Assurance of Size of sealing surface step 9, design mesh easy to accomplish
Mark.The pretightning force step 10 of male and fomale(M&F) step flange guarantees sealing surface pressure by guaranteeing pretightning force.Sealing surface platform when assembly
Gasket assembly 3 is compressed and provides enough surface pressures by rank 9, when being compressed to pretightning force step 10 and being bonded to each other, is just reached
To design pretightning force.After pretightning force step 10 is bonded, second sealing surface is formed.On the one hand guarantee sealing, on the other hand guarantee
Gasket assembly 3 is not exposed, forms protection.The fitting of pretightning force step 10 can guarantee vehicle in vibration and deformation simultaneously
Sealing device sealing surface pressure keeps uniform, stablizes.
The height of the convex surface step flange 2 and concave surface step flange 4 is 25mm, and wall thickness is greater than 3mm, in maximum limit
Welding deformation at sealing surface is reduced on degree, to reduce welding difficulty, improves sealing device reliability.Convex surface step flange 2 and recessed
There is welded limiting step 12 in the end of face step flange 4, guarantees that the welding position of pipeline and flange is fixed, is no more than limited step
12.Sealing device maintains device inside diameter uniform from front to back, guarantees internal roughness requirements, to guarantee pipeline inner wall not shape
At projecting point, the attachment of urea droplets is avoided, avoids internal urea crystals.
In conclusion the utility model characteristics of compact layout, it is particularly suitable for that arrangement space is smaller, assembles inconvenient position,
With part universality is good, process for machining and manufacturing is simple, arrangement is convenient and the advantage of assembly good reliability.
Claims (7)
1. a kind of high temperature pressure seal device for the sealing of gas-liquid two-phase, it is characterised in that: including front tube (1), convex surface step
Flange (2), gasket assembly (3), concave surface step flange (4), rear pipe (5) and V-type clip assembly (6), the front tube (1) and
The limited step (12) of convex surface step flange (2) is fixedly connected, the limiting stand of the rear pipe (5) and concave surface step flange (4)
Rank (12) is fixedly connected, and gasket assembly (3) is assemblied in the root of the long seam allowance (7) of convex surface step flange (2) welding assembly simultaneously
It forms interference fit to fix, the sealing surface step (9) of convex surface step flange (2) and concave surface step flange (4) is pressed on gasket
On assembly (3), the pretightning force step (10) of convex surface step flange (2) and concave surface step flange (4) is compacted to flange face fitting,
V-groove clip assembly (6) is nested with the ladder being collectively formed on the flange inclined-plane of convex surface step flange (2) and concave surface step flange (4)
Shape junction.
2. a kind of high temperature pressure seal device for the sealing of gas-liquid two-phase as described in claim 1, it is characterised in that: described
Long seam allowance (7) be that length is greater than 10mm, root thickness is greater than 3mm, outside inclined-plane band inclined 87 ° of inclination angles inwardly.
3. a kind of high temperature pressure seal device for the sealing of gas-liquid two-phase as described in claim 1, it is characterised in that: described
Convex surface step flange (2) and the height of concave surface step flange (4) be 25mm, wall thickness is greater than 3mm, Ying Caiyong stainless steel
Material.
4. a kind of high temperature pressure seal device for the sealing of gas-liquid two-phase as described in claim 1, it is characterised in that: described
Convex surface step flange (2) and the flange face thickness of concave surface step flange (4) be greater than 5mm, on flange face it is each there are two height not
Same step is sealing surface step (9) beyond flange face 1mm close to flange axle center, is pretightning force platform far from flange axle center
Rank (10) exceeds flange face 2mm.
5. a kind of high temperature pressure seal device for the sealing of gas-liquid two-phase as described in claim 1, it is characterised in that: described
Gasket assembly (3) outer diameter be greater than sealing surface step (9) outer diameter, while be less than pretightning force step (10) internal diameter.
6. a kind of high temperature pressure seal device for the sealing of gas-liquid two-phase as described in claim 1, it is characterised in that: described
Gasket assembly (3) thickness be greater than convex surface step flange (2) and concave surface step flange (4) pretightning force step (10) fitting
When, the gap between sealing surface step (9).
7. a kind of high temperature pressure seal device for the sealing of gas-liquid two-phase as described in claim 1, it is characterised in that: described
Sealing device it is directional, convex surface step flange (2) is in the upstream of air current flow direction, and concave surface step flange (4) is in downstream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821211375.2U CN208845717U (en) | 2018-07-27 | 2018-07-27 | A kind of high temperature pressure seal device for the sealing of gas-liquid two-phase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821211375.2U CN208845717U (en) | 2018-07-27 | 2018-07-27 | A kind of high temperature pressure seal device for the sealing of gas-liquid two-phase |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208845717U true CN208845717U (en) | 2019-05-10 |
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ID=66354686
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821211375.2U Active CN208845717U (en) | 2018-07-27 | 2018-07-27 | A kind of high temperature pressure seal device for the sealing of gas-liquid two-phase |
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| CN (1) | CN208845717U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792499A (en) * | 2019-11-12 | 2020-02-14 | 东风商用车有限公司 | Exhaust pipeline sealing structure |
| CN113586569A (en) * | 2021-07-14 | 2021-11-02 | 中国重汽集团济南动力有限公司 | Assembly method of exhaust pipe |
-
2018
- 2018-07-27 CN CN201821211375.2U patent/CN208845717U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110792499A (en) * | 2019-11-12 | 2020-02-14 | 东风商用车有限公司 | Exhaust pipeline sealing structure |
| CN113586569A (en) * | 2021-07-14 | 2021-11-02 | 中国重汽集团济南动力有限公司 | Assembly method of exhaust pipe |
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