CN110469733A - A kind of flange sealing structure and its installation method suitable for the big hot-fluid environment of high temperature - Google Patents
A kind of flange sealing structure and its installation method suitable for the big hot-fluid environment of high temperature Download PDFInfo
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- CN110469733A CN110469733A CN201910734345.2A CN201910734345A CN110469733A CN 110469733 A CN110469733 A CN 110469733A CN 201910734345 A CN201910734345 A CN 201910734345A CN 110469733 A CN110469733 A CN 110469733A
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- flange
- tenon
- face
- inner cylinder
- slot
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Flanged Joints, Insulating Joints, And Other Joints (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The present invention provides a kind of flange sealing structure and its installation method suitable for the big hot-fluid environment of high temperature, solves the problems, such as the inconvenient big hot-fluid plant maintenance of existing integral type high temperature, production and maintenance cost is higher, is difficult to reuse after damage.The sealing structure includes two inner cylinders and compatible slot flange and tenon flange；The docking end face of two flanges is divided into inner side end and end face outside respectively by slot and tenon；Two inner cylinders are respectively welded at the inside of two flanges, and there are gap between two inner cylinders and two flanges, the end face of two inner cylinders is flushed with the inner side end of two flanges respectively, and the wall surface of two inner cylinders flushes or formed the step of downstream direction；It is provided with gasket in slot, is provided with inorganic high-temp glue between the inner side end of two flanges and between the docking end face of two inner cylinders；The anti-adhesive-layer that high temperature easily vaporizes is additionally provided between docking end face and the inorganic high-temp glue of two inner cylinders, thickness is not more than 0.1mm；It is fastened on the outside of two flanges by fastener.
Description
Technical field
The invention belongs to the sealing techniques of the big hot-fluid equipment of field of aerospace high temperature, and in particular to one kind is suitable for high temperature
The flange sealing structure and its installation method of big hot-fluid environment.
Background technique
In recent years, with the fast development of aeronautical and space technology, especially near space hypersonic aircraft and reentering
The development of aircraft proposes requirements at the higher level to the anti-ablation and thermal protective performance of material.For this reason, it may be necessary to the advanced big heat of high temperature
Ground-testing plant is flowed to carry out the high temperature resistance super Journal of Sex Research of new material.
The existing big hot-fluid equipment of high temperature, in order to have when 3600K or more combustion gas stream is washed away for a long time
There is stable reliability, therefore mostly use integrated equipment (using welding structure or integrated formed structure) greatly, to avoid pair
Seam gap exists, but integrated equipment is not convenient for safeguarding in practical applications, and production and maintenance cost are higher, for difference
Test objective, the heating equipment of different size jet nozzle front end not only cannot be general, but also any group in integral device
In the case that there is damage in part, it is difficult to it reuses, scalability is poor, need to re-replace the big hot-fluid equipment of new high temperature,
Cause scientific research cost that cannot give full play to the value efficiently utilized.
Therefore, during the type equipment development, the big hot-fluid equipment of high temperature for introducing removable component can be attempted, is researched and developed
A kind of flange sealing structure and its installation method suitable for the big hot-fluid environment of high temperature prevents high temperature gas flow when operation from rushing for a long time
Brush is unfavorable for the thermal protection of detachable component butt seam two sides product, to meet in product structure design to reliability
It is required that.
Summary of the invention
The present invention provides a kind of flange sealing structures and its installation method suitable for the big hot-fluid environment of high temperature, solve
The existing big hot-fluid plant maintenance of integral type high temperature is inconvenient, production and maintenance cost are higher, any component occurs in integral device
In the case where damage, it is difficult to the problem of reusing.
To achieve the above object, technical solution provided by the present invention is:
A kind of flange sealing structure suitable for the big hot-fluid environment of high temperature, is characterized in that, including the first inner cylinder,
Two inner cylinders and compatible slot flange and tenon flange；
It is right that the docking end face of slot flange and tenon flange is divided into inside respectively by the slot of the slot flange and the tenon of tenon flange
End face is docked in contact surface and outside；
First inner cylinder and the second inner cylinder are respectively welded at the inside of slot flange and tenon flange, and two inner cylinders are respectively with two
There are the gaps for filling cooling water between a flange, form sandwich；The docking end face of two inner cylinders respectively with two
End face is docked in the inside of flange, and the wall surface of two inner cylinders flushes or formed the step of downstream direction；
Gasket is provided in the slot of the slot flange, between the inside docking end face of two flanges and the docking of two inner cylinders
Integrated inorganic high-temp glue is provided between end face, for filling butt seam；Wherein, the docking end face of two inner cylinders and inorganic height
The anti-adhesive-layer that high temperature easily vaporizes is additionally provided between warm glue, for preventing between inorganic high-temp glue and two inner cylinder end faces directly
Adhesion；In order to avoid the gap between inorganic high-temp glue and two inner cylinder end faces is excessive, it is unfavorable for thermal protection, the anti-adhesive-layer
Thickness be not more than 0.1mm；
The outside of the slot flange and tenon flange is fastenedly connected by fastener.
Further, the inorganic high-temp glue with a thickness of 2/3~4/5 of tenon height in the tenon flange；Inorganic high-temp
The surface of glue is concordant with the wall surface of butt seam two sides inner cylinder, or is no more than 0.5mm lower than butt seam two sides inner cylinder wall surface,
The inner cylinder wall surface for ensuring the non-bulging butt seam two sides of inorganic high-temp glue avoids the big hot-fluid front of high temperature from washing away inorganic high-temp glue；
The gasket is graphite wound gasket, and graphite wound gasket has certain thermal protection effect, the energy under the temperature environment of 2000K
Reliable sealing.
Meanwhile the present invention also provides the installation method of the above-mentioned flange sealing structure suitable for the big hot-fluid environment of high temperature,
It is characterized in that, comprising the following steps:
S1 installation
S1.1 is coated with anti-adhesive-layer on the docking end face of the first inner cylinder and the second inner cylinder, and makes anti-sticking curable adhesive layer；
The anti-adhesive-layer is coated using the anti-viscose glue that high temperature easily vaporizes, and coating thickness is not more than 0.1mm；
S1.2 docks the docking end face for the second inner cylinder on end face and being welded on the inside of tenon flange in the inside of tenon flange
The inorganic high-temp glue of upper rapid application paste；Using the inorganic high-temp glue of paste, though its mobility is weaker, in the work of gravity
With it is lower or can generating unit shunt it is dynamic, therefore, when smearing inorganic high-temp glue movement will fastly, avoid flowing to because of inorganic high-temp glue in
On cylinder, also need subsequent to carry out the unnecessary process such as cleaning；
The smearing thickness of inorganic high-temp glue reliably working at 1600 DEG C, inorganic high-temp glue is less than in the tenon flange
The height of tenon；
The filling sealed pad in the slot of the big hot-fluid equipment Demountable slot flange of high temperature；
S1.3 slot flange and tenon flange are assembled and on the outside fastening it is uniform, when assembling, should prevent the of butt seam two sides
One inner cylinder and the second inner cylinder form inverse airflow direction step, to prevent the punching of high temperature gas flow (flow is larger, about 30Kg/s) front
Brush inorganic high-temp glue, more or less has an adverse effect to the service life of inorganic high-temp glue；
S1.4 strikes off the extra inorganic high-temp glue (nothing that the airflow channel side formed after i.e. each component docking is overflowed after docking
Machine high-temp glue), it is ensured that the inner cylinder wall surface of the non-bulging butt seam two sides of inorganic high-temp glue is conducive to butt seam and reliably seals,
And make inorganic high-temp adhesive curing in butt seam, it can be used to carry out equipment test after solidification.
Further, in S1.2, the filling thickness of inorganic high-temp glue described in butt seam is that tenon is high in the tenon flange
The 2/3~4/5 of degree, within this range, the sealing effect of abutted flange is best and service life longest.
Further, the specific steps of S1.3 are as follows:
Slot flange and tenon flange are assembled and fastened on the outside, and uniformly chooses 5~12 position measurements two by circumferential
The width in gap is between a flange outside docking end face to judge whether slot flange and tenon flange fasten uniformly, wherein outside gap
Width should be less than Theoretical Design value, and the relative deviation of each position width is respectively less than 10%, to guarantee slot flange and tenon
Flange perfection docking, keeps inorganic high-temp glue and the inside butt end face contact of two flanges abundant, without gap, meanwhile, in group
It should prevent the first inner cylinder of butt seam two sides and the second inner cylinder from forming inverse airflow direction step when dress.
Further, it in S1.4, strikes off and docks surface and abutment joint that extra inorganic high-temp glue refers to inorganic high-temp glue
The wall surface of gap two sides inner cylinder is concordant, or is no more than 0.5mm lower than butt seam two sides inner cylinder wall surface；If inorganic high-temp glue is convex
The wall surface of butt seam two sides inner cylinder out in the front of high temperature gas flow can wash away lower softening and shedding then in test, be unfavorable for pair
Connect gap sealing.
Further, for hot-fluid equipment big for the high temperature for ground experiment, it is necessary to assure its reliable performance, because
This, further includes step S0 before S1:
S0. the end face of docking for docking end face, the first inner cylinder and the second inner cylinder of slot flange and tenon flange, removal docking are cleaned
Carbon distribution on end face.After usage, combustion gas stream can remain some carbon distributions on docking end face to the big hot-fluid equipment of high temperature, and carbon distribution
It with certain thermal resistance, influences thermally conductive, so that cooling water can not take away heat, thermal protection ability is caused to decline, test result is produced
Raw certain influence, meanwhile, carbon distribution also will affect the bonding of inorganic high-temp glue and matrix；Therefore, to again using having used
When the component crossed, it is necessary to before assembling sealing, the carbon distribution on the face of each component butt end be removed, to ensure that sealing can between component
It leans on.When removing carbon remover, the solvent cleaning docking end face of the volatile dissolvable carbon distribution such as gasoline can be used.
Further, further include S2 after S1:
2 disassemblies
S2.1 removes the fastener on the outside of slot flange and tenon flange；
S2.2 circumferentially uniformly chooses multiple points in the outside butt seam of flange sealing structure, will by tool force
Slot flange and the separation of tenon flange, are also in the process of disassembly, fully consider；
S2.3 removes remaining inorganic high-temp glue.
Further, it in S2.1, if fastener has multiple, needs symmetrically to remove fastener one by one；Ensure flange seal
Structure circumferential direction stress is still uniform, prevents occurring the case where damage ontology in disassembly process；
In S2.3, remaining inorganic high-temp glue is removed using fine sandpaper polishing, when polishing can avoid damage flange body.
Further, in S1.1 and S1.2, solidification is each meant in the environment of temperature is not less than 15 DEG C, it is more than solidification for 24 hours,
Temperature is too low, is unfavorable for solidifying；In S1.2, the gasket loaded in slot flange slot is graphite wound gasket；Inorganic high-temp glue is ZA-
1071 inorganic high-temp glue；In S1.3, the width in gap on the outside of 8 position measurement abutted flanges is uniformly chosen, selection number is moderate,
And it is also more comprehensive to compare position.
Further, in S1.1, it is anti-sticking that the anti-viscose glue that high temperature easily vaporizes refers to that temperature is vaporized in 1000K or more
Glue.
The invention has the advantages that
1. flange sealing structure of the present invention can satisfy the requirement under the big hot-fluid environment of high temperature to equipment dependability, structure letter
It is single, detachable member sealing is fitted together using existing standard chase mortise flange.The structure according to the usage requirement into
Row disassembly, and have the characteristics that share using members in the equipment of the flange sealing structure, occur in any component
In the case where damage, it is only necessary to dismantle equipment, replace the component of damage, other components of good performance remain to repeat benefit
With can greatly reduce testing equipment quantity, reduce development, processing, use and maintenance cost；Meanwhile using the flange seal
Structure eliminates the adverse effect of the big hot-fluid equipment Demountable butt seam of high temperature.
Since both chase mortise flange and inner cylinders for constituting Demountable material is different, chase mortise flange is biggish for intensity
Steel；Inner cylinder then needs the material big using heat-conducting system, such as Copper alloy material, and the coefficient of expansion of this kind of material is larger, but strong
Spend small compared with steel, if inorganic high-temp glue is directly be bonded with inner cylinder, when use, will appear the case where inner cylinder heating end surface expansion is obstructed, with
And detachable, damage inner cylinder ontology the case where, therefore, the anti-viscose glue that high temperature easily vaporizes need to be coated on the docking end face of inner cylinder,
Prevent inner cylinder and the direct adhesion of inorganic high-temp glue, make after anti-viscose glue high-temperature evaporation between inorganic high-temp glue and inner cylinder end face there are
A little gap is allowed some leeway for inner cylinder expanded by heating, meanwhile, inner cylinder ontology will not be destroyed in disassembly, convenient for recycling, is
While easy to disassemble and recycling, it still is able to the reliability for ensuring to seal, which must be sufficiently narrow, therefore anti-
The coating thickness of viscose glue is not more than 0.1mm.
2. in the present invention inorganic high-temp glue with a thickness of 2/3~4/5 of tenon height in tenon flange, nothing highly-filled by this
Machine high-temp glue can give enough bonding forces and play preferable sealing function.
3. by slot flange and the assembling of tenon flange, fastening in flange sealing structure installation method of the present invention, in circumferential uniformly choosing
The width in gap on the outside of 5~12 position measurement abutted flanges is taken, and then it is thick to survey the inorganic high-temp glue that inside gap is circumferentially filled
Whether suitable spend, it is ensured that filling uniformly, relative deviation less than 10%, meanwhile, when assembling, prevents in the first of butt seam two sides
Cylinder and the second inner cylinder form inverse airflow direction step, avoid high temperature gas flow front from washing away and have an adverse effect to inorganic high-temp glue.
4. the present invention strikes off the inorganic high-temp glue that airflow channel side is extra after docking after slot flange and the assembling of tenon flange,
Also for avoiding high temperature gas flow from excessively contacting with inorganic high-temp glue, excessive influence is generated on inorganic high-temp glue, it is ensured that inorganic height
Warm glue service life is longer.
5. combustion gas stream will be more or less in abutted flange butt end after the big hot-fluid equipment of high temperature uses at least once
Remain carbon distribution on face and inner cylinder docking end face, long-term accumulation, be unfavorable for that product is thermally conductive and inorganic high-temp glue and matrix between
Bonding；Therefore, after equipment runs a period of time, end face need to be docked to abutted flange and inner cylinder docking end face is cleaned, is gone
Carbon remover avoids the use of carbon distribution remaining influence and test effect.
6., can when needing conventional maintenance or maintenance using the big hot-fluid equipment of high temperature of flange sealing structure in the present invention
The flange sealing structure is dismantled, and because after use under high temperature environment, anti-adhesive-layer has vaporized disappearance, therefore, Gu
It can't be sticked together between the inorganic high-temp glue of change and the inner cylinder of two sides, it is only necessary to which the fastener on the outside of chase mortise flange is symmetrical
It removes one by one, it is ensured that flange sealing structure circumferential direction stress is still uniform, prevents occurring the case where damage ontology in disassembly process；
Then multiple points are circumferentially uniformly chosen in butt seam on the outside, are separately by slot flange and tenon flange by tool force
Can, then remove the inorganic high-temp glue on the inside of slot flange and tenon flange on docking end face；The disassembly process of total is simply easy
Operation, and will not influence reusing for chase mortise flange and inner cylinder.
Detailed description of the invention
Fig. 1 is to use flange sealing structure of the present invention；
Fig. 2 is the schematic diagram that abutted flange after high-temperature heat flux test is carried out using existing encapsulating method；
Fig. 3 is the schematic diagram that abutted flange after high-temperature heat flux test is carried out using encapsulating method of the present invention；
Drawing reference numeral is as follows:
1- slot flange；2- tenon flange；3- gasket；The first inner cylinder of 4-；The second inner cylinder of 5-；6- inorganic high-temp glue.
Specific embodiment
The contents of the present invention are described in further detail below in conjunction with the drawings and specific embodiments:
As shown in Figure 1, in a kind of flange sealing structure suitable for the big hot-fluid environment of high temperature, including the first inner cylinder 4, second
Cylinder 5 and compatible slot flange 1 and tenon flange 2；
It is right that the docking end face of slot flange 1 and tenon flange 2 is divided into inside respectively by the slot of slot flange 1 and the tenon of tenon flange 2
End face is docked in contact surface and outside；
First inner cylinder 4 and the second inner cylinder 5 are respectively welded at the inside of slot flange 1 and tenon flange 2, and two inner cylinders are respectively with two
There are the gaps for filling cooling water between a flange, form sandwich；The docking end face of two inner cylinders respectively with two
End face is docked in the inside of flange, and the wall surface of two inner cylinders flushes or formed the step of downstream direction.Slot flange 1
It is provided with graphite wound gasket in slot, is provided with one between the inside docking end face of two flanges and between the docking end face of two inner cylinders
Inorganic high-temp glue 6, for filling butt seam；Inorganic high-temp glue 6 with a thickness of 2/3~4/5 of tenon height in tenon flange 2,
And the surface of inorganic high-temp glue 6 is concordant with the wall surface of butt seam two sides inner cylinder, or is lower than butt seam two sides inner cylinder wall surface
No more than 0.5mm, it is ensured that the inner cylinder wall surface of the non-bulging butt seam two sides of inorganic high-temp glue 6 avoids the big hot-fluid front punching of high temperature
Brush inorganic high-temp glue 6；The anti-viscose glue that high temperature easily vaporizes is additionally provided between docking end face and the inorganic high-temp glue 6 of two inner cylinders
Layer, for preventing direct adhesion between inorganic high-temp glue 6 and two inner cylinders；In order to avoid inorganic high-temp glue 6 and two inner cylinders it
Between gap it is excessive, be unfavorable for thermal protection, the thickness of anti-adhesive-layer is not more than 0.1mm；The outside of slot flange 1 and tenon flange 2 is logical
Multiple fasteners are crossed to be fastenedly connected.
The installation method of the above-mentioned flange sealing structure suitable for the big hot-fluid environment of high temperature, comprising the following steps:
S1 installation
S1.1 is coated with anti-adhesive-layer on the docking end face of the first inner cylinder 4 and the second inner cylinder 5, and is not less than 15 in temperature
In the environment of DEG C, more than solidification for 24 hours；
Using high temperature, (temperature is coated anti-adhesive-layer in the anti-viscose glue that 1000K or more) is easily vaporized, and coating thickness is not
Greater than 0.1mm, existing high-precision coating machine can be used and coat or using manual application；When using manual application, it is
Guarantee coating thickness is not more than 0.1mm, first can carry out engineering test to manual application, and first sample plate thickness, applies before coating
Thickness measure is carried out again after covering one layer of solidification, continues to measure thickness after applied in two coats solidification, and so on, verification experimental verification goes out thickness
The maximum coating number of plies no more than 0.1mm；And coating operation is carried out according to test result, it can guarantee that coating thickness is requiring model
In enclosing.
S1.2 docks on end face and is welded on the butt end of the second inner cylinder 5 of 2 inside of tenon flange in the inside of tenon flange 2
The inorganic high-temp glue 6 of rapid application paste on face；Using the inorganic high-temp glue 6 of paste, though its mobility is weaker, in gravity
Under the action of or can generating unit shunt dynamic, therefore, when smearing inorganic high-temp glue 6, movement will avoid subsequent unnecessary fastly
Process；
The inorganic high-temp glue 6 that ZS-1071 etc. meets national standard can be used in above-mentioned inorganic high-temp glue 6, the reliable work at 1600 DEG C
Make, the smearing thickness of inorganic high-temp glue 6 is less than the height of tenon in tenon flange 2, and filling thickness is preferably tenon height in tenon flange 2
2/3~4/5；
Graphite wound gasket is loaded in the slot of the big hot-fluid equipment Demountable slot flange 1 of high temperature, loads graphite winding
As long as pad is completed before assembly, can also be completed before coating anti-adhesive-layer；
Slot flange 1 and tenon flange 2 are assembled and are fastened on the outside by S1.3, uniformly choose 5~12 positions (most by circumferential
8 for choosing moderate number well) it measures the width in gap on the outside of abutted flange and then judges whether slot flange 1 and tenon flange 2 are tight
Gu uniformly, the width in outside gap should be less than Theoretical Design value, and the relative deviation of each position width is respectively less than 10%, thus
Guarantee slot flange 1 and the perfect docking of tenon flange 2, keeps inorganic high-temp glue 6 and butt end face contact abundant, without gap, meanwhile, In
It should prevent the inner cylinder of butt seam two sides from inverse airflow direction step occur when assembling, (flow is larger, about to prevent high temperature gas flow
30Kg/s) inorganic high-temp glue 6 is washed away in front, more or less has an adverse effect to the service life of inorganic high-temp glue 6.
S1.4 strikes off the extra inorganic high-temp glue 6 in airflow channel side after docking so that the surface of inorganic high-temp glue 6 with dock
The wall surface of gap two sides inner cylinder is concordant, or is no more than 0.5mm lower than butt seam two sides inner cylinder wall surface, is not less than 15 in temperature
In the environment of DEG C, more than solidification for 24 hours, it can be used to be tested after solidification.
For hot-fluid equipment big for the high temperature for ground experiment, it is necessary to assure its reliable performance, therefore, before S1
Further include step S0:
S0. end face, the are docked using the solvent cleaning slot flange 1 of the volatile dissolvable carbon distribution such as gasoline and tenon flange 2
The carbon distribution on end face is docked in the end face of docking of one inner cylinder 4 and the second inner cylinder 5, removal.Because the big hot-fluid equipment of high temperature is using it
Afterwards, combustion gas stream can remain some carbon distributions on docking end face, and carbon distribution has certain thermal resistance, influence it is thermally conductive so that cooling water without
Method takes away heat, and thermal protection ability is caused to decline, and generates certain influence to test result, meanwhile, carbon distribution also will affect inorganic height
The bonding of warm glue 6 and matrix.
After use, it when carrying out conventional maintenance or maintenance to equipment, is dismantled in accordance with the following methods,
S2 disassembly
S2.1 symmetrically removes multiple fasteners on the outside of slot flange and tenon flange one by one, it is ensured that flange sealing structure is circumferential
Stress is still uniform, prevents occurring the case where damage ontology in disassembly process；
S2.2 circumferentially uniformly chooses multiple points in the outside butt seam of flange sealing structure, will by tool force
Slot flange and the separation of tenon flange, are also in the process of disassembly, fully consider；
S2.3 removes remaining inorganic high-temp glue using fine sandpaper polishing, and when polishing can avoid damage flange body.
In order to verify the reliability of the flange sealing structure, the present invention has also carried out Comparability test:
One, the butt seam of chase mortise flange 2 is sealed using existing general encapsulating method, and in 3600K or more
Combustion gas stream under wash away 20s, flange arrangement can there is a phenomenon where hot-spots, ablation, referring to fig. 2, or even occur cooling water from
The case where end face is revealed, causes whole equipment to be scrapped；It can be seen that hot-fluid big for the high temperature for carrying out operation under high temperature environment
Equipment, conventional sealing structure are not able to satisfy the requirement of product reliability.
Two, the big hot-fluid equipment of high temperature is assembled using flange sealing structure of the present invention, and carries out the test of single 1000s heat examination,
After the test of 2396s heat examination is completed in accumulation, control flange structure is still as excellent as before, as shown in figure 3, further demonstrating the sealing side
The reliability of method.
Sealing structure in the present invention applies also for the sealing that same type has Demountable equipment interconnection gap
In.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art can readily occur in various equivalent modifications or replace in technical scope disclosed by the invention
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of flange sealing structure suitable for the big hot-fluid environment of high temperature, it is characterised in that: including the first inner cylinder (4), second
Inner cylinder (5) and compatible slot flange (1) and tenon flange (2)；
The slot of the slot flange (1) and the tenon of tenon flange (2) respectively separate the docking end face of slot flange (1) and tenon flange (2)
End face is docked for inside and end face is docked in outside；
First inner cylinder (4) and the second inner cylinder (5) are respectively welded at the inside of slot flange (1) and tenon flange (2), two inner cylinders
Respectively between two flanges there are the gap for filling cooling water, the docking end face of two inner cylinders respectively with two flanges
End face is docked in inside, and the wall surface of two inner cylinders flushes or formed the step of downstream direction；
It is provided with gasket (3) in the slot of the slot flange (1), between the inside docking end face of two flanges and pair of two inner cylinders
Inorganic high-temp glue (6) are provided between contact surface, for filling butt seam；Wherein, the docking end face of two inner cylinders and inorganic height
The anti-adhesive-layer that high temperature easily vaporizes is additionally provided between warm glue (6), the thickness of the anti-adhesive-layer is not more than 0.1mm；
The outside of the slot flange (1) and tenon flange (2) is fastenedly connected by fastener.
2. the flange sealing structure according to claim 1 suitable for the big hot-fluid environment of high temperature, it is characterised in that: the nothing
Machine high-temp glue (6) with a thickness of 2/3~4/5 of tenon height in the tenon flange (2)；The surface of inorganic high-temp glue (6) with dock
The wall surface of gap two sides inner cylinder is concordant, or is no more than 0.5mm lower than butt seam two sides inner cylinder wall surface；The gasket (3)
For graphite wound gasket.
3. a kind of installation method of the flange sealing structure described in claim 1 suitable for the big hot-fluid environment of high temperature, feature
It is, comprising the following steps:
S1 installation
S1.1 is coated with anti-adhesive-layer on the docking end face of the first inner cylinder (4) and the second inner cylinder (5), and keeps anti-adhesive-layer solid
Change；
The anti-adhesive-layer is coated using the anti-viscose glue that high temperature easily vaporizes, and coating thickness is not more than 0.1mm；
S1.2 docks the docking for the second inner cylinder (5) on end face and being welded on the inside of tenon flange (2) in the inside of tenon flange (2)
The inorganic high-temp glue (6) of rapid application paste on end face；
The smearing thickness of inorganic high-temp glue (6) reliably working at 1600 DEG C, inorganic high-temp glue (6) is less than the tenon flange
(2) height of tenon in；
The filling sealed pad (3) in the slot of the big hot-fluid equipment Demountable slot flange (1) of high temperature；
S1.3 slot flange (1) and tenon flange (2) are assembled and on the outside fastening it is uniform, when assembling, should prevent butt seam two sides
The wall surface of first inner cylinder (4) and the second inner cylinder (5) forms inverse airflow direction step；
S1.4 strikes off extra inorganic high-temp glue (6) after docking, and solidifies the inorganic high-temp glue (6) in butt seam.
4. the installation method according to claim 3 with the flange sealing structure for being suitable for the big hot-fluid environment of high temperature, special
Sign is: in S1.2, the filling thickness of inorganic high-temp glue described in butt seam (6) is tenon height in the tenon flange (2)
2/3~4/5.
5. the installation method of the flange sealing structure according to claim 4 suitable for the big hot-fluid environment of high temperature, feature
It is, the specific steps of S1.3 are as follows:
Two flanges are measured by slot flange (1) and tenon flange (2) assembling fastening, and by circumferentially uniformly choosing 5~12 positions
The width in gap is between the docking end face of outside to judge whether slot flange (1) and tenon flange (2) fasten uniformly, wherein outside gap
Width should be less than Theoretical Design value, and the relative deviation of each position width is respectively less than 10%；Meanwhile it should be prevented in assembling
The first inner cylinder (4) of butt seam two sides and the wall surface of the second inner cylinder (5) form inverse airflow direction step.
6. the installation method of the flange sealing structure according to claim 5 suitable for the big hot-fluid environment of high temperature, feature
It is: in S1.4, strikes off surface and butt seam two that inorganic high-temp glue (6) extra after docking refers to inorganic high-temp glue (6)
The wall surface of side inner cylinder is concordant, or is no more than 0.5mm lower than butt seam two sides inner cylinder wall surface.
7. according to the installation method of any flange sealing structure suitable for the big hot-fluid environment of high temperature of claim 3-6,
It is characterized in that, further including step S0 before S1:
S0. cleaning slot flange (1) docks end face with the second inner cylinder (5) with dock end face, the first inner cylinder (4) of tenon flange (2),
Carbon distribution on removal docking end face.
8. according to the installation method of any flange sealing structure suitable for the big hot-fluid environment of high temperature of claim 3-6,
It is characterized in that, further including S2 after S1:
S2 disassembly
S2.1 removes the fastener on the outside of slot flange (1) and tenon flange (2)；
S2.2 circumferentially uniformly chooses multiple points in the outside butt seam of flange sealing structure, by tool force by channel process
Blue (1) and tenon flange (2) separation；
S2.3 removes remaining inorganic high-temp glue (6).
9. the installation method of the flange sealing structure according to claim 8 suitable for the big hot-fluid environment of high temperature, feature
It is:
In S2.1, if fastener has multiple, need symmetrically to remove fastener one by one；
In S2.3, remaining inorganic high-temp glue is removed using fine sandpaper polishing.
10. the installation method of the flange sealing structure according to claim 5 suitable for the big hot-fluid environment of high temperature, feature
It is:
In S1.1 and S1.2, solidification is each meant in the environment of temperature is not less than 15 DEG C, more than solidification for 24 hours；
In S1.2, the gasket (3) that loads in slot flange (1) slot is graphite wound gasket, inorganic high-temp glue (6) be ZS-1071 without
Machine high-temp glue (6)；
In S1.3, the width in gap on the outside of 8 position measurement abutted flanges is uniformly chosen.
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