CN213776785U - Novel air-cooled non-metal expansion joint - Google Patents
Novel air-cooled non-metal expansion joint Download PDFInfo
- Publication number
- CN213776785U CN213776785U CN202022132685.9U CN202022132685U CN213776785U CN 213776785 U CN213776785 U CN 213776785U CN 202022132685 U CN202022132685 U CN 202022132685U CN 213776785 U CN213776785 U CN 213776785U
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- pipe
- expansion joint
- air
- cooling
- skin
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- 229910052755 nonmetal Inorganic materials 0.000 title claims abstract description 36
- 238000001816 cooling Methods 0.000 claims abstract description 61
- 239000003546 flue gas Substances 0.000 claims abstract description 42
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000000945 filler Substances 0.000 claims abstract description 13
- 239000000779 smoke Substances 0.000 claims abstract description 11
- 238000004321 preservation Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 15
- 238000002955 isolation Methods 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 3
- 239000000112 cooling gas Substances 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of machinery. A novel air-cooled nonmetal expansion joint comprises an inner flange, an outer flange, a skin and a heat-preservation filler, wherein the inner flange is used for being fixed on a furnace wall, the outer flange is used for being fixed on a flue gas pipeline, two ends of the skin are respectively connected with the inner flange and the outer flange, the heat-preservation filler is filled in a region between the skin and the flue gas pipeline, the novel air-cooled nonmetal expansion joint also comprises a lining pipe, one end of the lining pipe is fixed on the furnace wall or the inner flange, a gap is reserved between the other end of the lining pipe and the outer flange, and the lining pipe is located in a region between the skin and the flue gas pipeline; the cooling device further comprises a cooling pipe used for conveying cooling gas, the cooling pipe is fixedly connected with the lining pipe, the air outlet of the cooling pipe is located in the area between the lining pipe and the smoke pipeline, and the air inlet of the cooling pipe is located on the periphery of the skin. The cooling pipe and the lining pipe are additionally arranged, so that the problem that the skin is rapidly out of service due to high temperature is solved.
Description
Technical Field
The utility model relates to the technical field of machinery, specifically non-metal expansion joint.
Background
The nonmetal expansion joint is widely applied to high-temperature flue gas discharge pipelines of gas turbine waste heat boilers and various circulating fluidized bed boilers, and is mainly used for compensating pipeline displacement and absorbing pipeline vibration. The non-metal expansion joint generally comprises a skin, a heat insulation packing layer, an inner flange and an outer flange, wherein the inner flange is fixed on a furnace wall, the outer flange is fixed on a flue gas pipeline, the heat insulation packing layer is positioned between the inner flange and the outer flange, and the inner flange is connected with the outer flange through the skin. The skin is a main telescopic body of the non-metal expansion joint, is a high-strength sealing composite material, and has the heat-resistant limit temperature of 150-200 ℃.
The main defects of the existing nonmetal expansion joint are as follows: after long-time use, the inside of nonmetal expansion joint is because sealed not firm scheduling problem, infiltration part high temperature flue gas, and these high temperature flue gases can rise to the skinning layer rapidly, make the skinning lose efficacy because of the high temperature is quick, lead to the damage of nonmetal expansion joint, can cause the fire alarm even, cause the incident. Therefore, the structure of the traditional nonmetal expansion joint is urgently needed to be reasonably transformed, the internal heat transfer of the nonmetal expansion joint is slowed down, the temperature of the skin transferred by the high-temperature flue is reduced, the normal work of the nonmetal expansion joint is guaranteed, and the safety accident caused by the failure of the nonmetal expansion joint is avoided.
SUMMERY OF THE UTILITY MODEL
Problem to prior art existence, the utility model provides a novel air cooling nonmetal expansion joint to solve current nonmetal expansion joint surface covering because of the technical problem of high temperature quick inefficacy.
In order to achieve the purpose, the utility model provides a novel air-cooled nonmetal expansion joint, which comprises an inner flange fixed on a furnace wall, an outer flange fixed on a flue gas pipeline, a skin and a heat preservation filler, wherein two ends of the skin are respectively connected with the inner flange and the outer flange, and the heat preservation filler is filled in a region between the skin and the flue gas pipeline;
the cooling pipe is fixedly connected with the lining pipe, the air outlet of the cooling pipe is located in the area between the lining pipe and the smoke pipeline, and the air inlet of the cooling pipe is located on the periphery of the skin.
This patent is through adding cooling tube and interior bushing pipe, is convenient for realize carrying out the convection current with the cooling tube derivation cooling air from the flue gas that flows in the clearance of brickwork and flue gas pipeline, realizes the cooling of flue gas, avoids the problem to the covering because of high temperature rapid failure. Through the air cooling technique, reduce the inside temperature of non-metal expansion joint, the inside heat preservation filler and the surperficial covering of protection non-metal expansion joint, the life of extension non-metal expansion joint improves the security of non-metal expansion joint under long-term service condition.
Further preferably, the lining pipe is formed by detachably connecting or welding two half pipe bodies.
The lining pipe is convenient to be sleeved on the periphery of the flue gas pipeline.
Further preferably, a metal net is fixed at the air outlet of the cooling pipe.
This patent is through the metal mesh, avoids high temperature filler to get into the cooling tube.
Further preferably, the device also comprises an auxiliary isolation pipe, wherein one axial end of the auxiliary isolation pipe is fixedly connected with the outer flange, and a gap is reserved between the other axial end of the auxiliary isolation pipe and the inner flange;
the auxiliary isolation pipe is sleeved on the periphery of the lining pipe.
And furthermore, a channel with a roundabout smoke path is realized, the time for transmitting the smoke to the skin is reduced, the temperature of the smoke from the skin is reduced, and the service life of the skin is ensured.
As a preferable scheme, at least two cooling pipes are arranged, and at least two cooling pipes are circumferentially arranged on the periphery of the flue gas pipeline.
The cooling air is conveniently and uniformly conveyed.
Further preferably, the air outlet of the cooling pipe faces the furnace wall.
Further preferably, the end of the cooling pipe is provided with an air outlet extending axially towards the furnace wall.
The convection of the leaked flue gas at the gap between the furnace wall and the flue gas pipeline is convenient to realize, and the temperature of the leaked flue gas is cooled. Meanwhile, the temperature outside the flue gas pipeline can be effectively reduced.
As another preferred scheme, the cooling pipe comprises a radially extending air inlet pipe and an annular air outlet pipe, the air outlet pipe is in butt joint with the air inlet pipe and communicated with the air inlet pipe, and an air outlet is formed in the air outlet pipe;
the gas outlet pipe is arranged on the periphery of the flue gas pipeline and is positioned in the area between the lining pipe and the flue gas pipeline.
The conveying of cooling air is convenient to realize.
Further preferably, one side of the gas outlet pipe, which is adjacent to the furnace wall, is provided with a gas outlet.
The convection of cooling air and flue gas is facilitated.
Further preferably, the air outlet is an annular gap having the same central axis as the air outlet pipe.
The uniform gas transmission in the circumferential direction is convenient to realize.
Or at least three air outlets are arranged on the air outlet pipe at circumferentially equal intervals.
The uniform gas transmission in the circumferential direction is convenient to realize.
Has the advantages that:
1) the problem that the skin on the surface of the non-metal expansion joint loses efficacy rapidly due to high temperature is effectively solved.
2) The internal temperature of the non-metal expansion joint is reduced, the heat-insulating filler inside the non-metal expansion joint and the skin on the surface are protected, the service life of the non-metal expansion joint is prolonged, and the safety of the non-metal expansion joint under long-term use conditions is improved.
Drawings
FIG. 1 is a cross-sectional view in the axial direction of embodiment 1 of the present invention;
fig. 2 is a cross-sectional view in the radial direction of embodiment 1 of the present invention;
fig. 3 is a cross-sectional view of embodiment 2 of the present invention;
fig. 4 is a cross-sectional view of embodiment 3 of the present invention.
Wherein, 1 is the covering, 2 is the heat preservation filler, 3 is flue gas pipeline, 4 is first cooling tube, 5 is first air inlet, 6 is the outward flange, 7 is interior bushing pipe, 8 is the bolt, 9 is the nut, 10 is the packing ring, 11 is the brickwork, 12 is second air inlet, 13 is the second cooling tube, 14 is supplementary isolation tube, 15 is the intake pipe, 16 is the outlet duct.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 2, embodiment 1 is a novel air-cooling non-metal expansion joint, which includes an inner flange fixed on a furnace wall 11, an outer flange 6 fixed on a flue gas pipe 3, a skin 1, and a heat insulating filler (which may be heat insulating cotton or other commercially available heat insulating materials), wherein two ends of the skin 1 are connected to the inner flange and the outer flange 6 through bolts 8 and nuts 9, respectively, and gaskets 10 are disposed between the nuts 9 and the inner flange and the outer flange 6. The area between the skin 1 and the flue gas pipeline 3 is filled with heat insulation filler.
The furnace further comprises an inner lining pipe 7, the smoke pipeline 3, the inner lining pipe 7 and the skin 1 are arranged from inside to outside along the radial direction, one axial end of the inner lining pipe 7 is fixed on the furnace wall or an inner flange, and a gap is reserved between the other axial end of the inner lining pipe 7 and the outer flange 6; the liner tube may be a stainless steel tube.
The cooling device further comprises a cooling pipe used for conveying cooling gas, the cooling pipe is fixedly connected with the lining pipe 7, the air outlet of the cooling pipe is located in the area between the lining pipe 7 and the smoke pipeline 3, and the air inlet of the cooling pipe is located on the periphery of the skin. The cooling tube may be a stainless steel tube.
Compressed air enters the lining pipe 7 through the cooling pipe, forced convection is generated between the lining pipe 7 and the flue gas pipeline 3, and the temperature of the outer side of the flue gas pipeline 3 is effectively reduced. After the compressed air has entered the inner lining tube 7, it is possible to cool the flue gases leaking between the inner lining tube 7 and the flue gas duct 3.
The lining pipe is formed by detachably connecting or welding two half pipe bodies. The lining pipe is convenient to be sleeved on the periphery of the flue gas pipeline.
A metal mesh may be fixed to the air outlet of the cooling tube. This patent is through the metal mesh, avoids high temperature filler to get into the cooling tube.
The cooling pipes can be provided with at least two, and at least two cooling pipes are circumferentially arranged on the periphery of the flue gas pipeline. The cooling air is conveniently and uniformly conveyed. The air outlet of the cooling pipe faces the furnace wall. The end part of the cooling pipe is provided with an air outlet which extends axially towards the furnace wall. The convection of the leaked flue gas at the gap between the furnace wall and the flue gas pipeline is convenient to realize, and the temperature of the leaked flue gas is cooled. And simultaneously, the temperature of the outer side of the flue gas pipeline 3 can be effectively reduced.
Fig. 1 and 2 show the case of 2 cooling pipes, which are the first cooling pipe 4 and the second cooling pipe 13, respectively. The first cooling duct 4 ends with a first air inlet 5, the first air inlet 5 being located at the periphery of the skin. The second cooling duct 13 ends with a second air inlet 12, the second air inlet 12 being located at the periphery of the skin.
Referring to fig. 3, embodiment 2, on the basis of embodiment 1, the difference lies in the structure of the cooling pipe, and the cooling pipe can adopt the following structure:
the cooling pipe can comprise a radially extending air inlet pipe 15 and an annular air outlet pipe 16, the air outlet pipe 16 is in butt joint with the air inlet pipe 15 and communicated with the air inlet pipe, and an air outlet is formed in the air outlet pipe; the air outlet pipe 16 is arranged on the periphery of the flue gas pipeline 3 and is positioned in the area between the lining pipe 7 and the flue gas pipeline 3. The conveying of cooling air is convenient to realize. One side of the air outlet pipe adjacent to the furnace wall is provided with an air outlet. The convection of cooling air and flue gas is facilitated. The air outlet is an annular gap with the same central axis as the air outlet pipe. The uniform gas transmission in the circumferential direction is convenient to realize. Or at least three air outlets are arranged on the air outlet pipe at circumferentially equal intervals. The uniform gas transmission in the circumferential direction is convenient to realize. The intake pipe is equipped with at least one, and when the intake pipe was equipped with two, the intake pipe circumference was arranged in the periphery of outlet duct. The air outlet pipe can be formed by detachably connecting or welding two semi-annular pipe bodies.
Referring to fig. 4, in embodiment 3, on the basis of embodiment 1, an auxiliary isolation pipe 14 is further included, one axial end of the auxiliary isolation pipe 14 is fixedly connected to the outer flange, and a gap is reserved between the other axial end of the auxiliary isolation pipe 14 and the inner flange; the auxiliary isolation pipe 14 is sleeved on the periphery of the lining pipe. And furthermore, a channel with a roundabout smoke path is realized, the time for transmitting the smoke to the skin is reduced, the temperature of the smoke from the skin is reduced, and the service life of the skin is ensured. And a channel for passing through the cooling pipe is formed on the auxiliary isolation pipe. The auxiliary isolation pipe is positioned between the skin and the lining 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 principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A novel air-cooled nonmetal expansion joint comprises an inner flange, an outer flange, a skin and a heat-preservation filler, wherein the inner flange is used for being fixed on a furnace wall, the outer flange is used for being fixed on a flue gas pipeline, two ends of the skin are respectively connected with the inner flange and the outer flange, and the heat-preservation filler is filled in a region between the skin and the flue gas pipeline;
the cooling pipe is fixedly connected with the lining pipe, the air outlet of the cooling pipe is located in the area between the lining pipe and the smoke pipeline, and the air inlet of the cooling pipe is located on the periphery of the skin.
2. The novel air-cooled non-metal expansion joint as claimed in claim 1, wherein: the lining pipe is formed by detachably connecting or welding two half pipe bodies.
3. The novel air-cooled non-metal expansion joint as claimed in claim 1, wherein: the cooling pipes are at least two and are circumferentially arranged on the periphery of the flue gas pipeline.
4. The novel air-cooled non-metal expansion joint as claimed in claim 1, wherein: and the air outlet of the cooling pipe faces the furnace wall.
5. The novel air-cooled non-metal expansion joint as claimed in claim 1, wherein: and the end part of the cooling pipe is provided with an air outlet which axially extends towards the furnace wall.
6. The novel air-cooled non-metal expansion joint as claimed in claim 1, wherein: the cooling pipe comprises a radially extending air inlet pipe and an annular air outlet pipe, the air outlet pipe is in butt joint with the air inlet pipe and communicated with the air inlet pipe, and an air outlet is formed in the air outlet pipe;
the gas outlet pipe is arranged on the periphery of the flue gas pipeline and is positioned in the area between the lining pipe and the flue gas pipeline.
7. The novel air-cooled non-metal expansion joint as claimed in claim 6, wherein: the gas outlet is arranged at one side of the gas outlet pipe adjacent to the furnace wall, and the gas outlet is an annular gap with the same central axis as the gas outlet pipe.
8. The novel air-cooled non-metal expansion joint as claimed in claim 6, wherein: and at least three gas outlets are arranged on the gas outlet pipe at circumferentially equal intervals.
9. The novel air-cooled non-metallic expansion joint according to any one of claims 1 to 8, wherein: and a metal net is fixed at the air outlet of the cooling pipe.
10. The novel air-cooled non-metallic expansion joint according to any one of claims 1 to 8, wherein: the axial end of the auxiliary isolating pipe is fixedly connected with the outer flange, and a gap is reserved between the axial other end of the auxiliary isolating pipe and the inner flange;
the auxiliary isolation pipe is sleeved on the periphery of the lining pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022132685.9U CN213776785U (en) | 2020-09-25 | 2020-09-25 | Novel air-cooled non-metal expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022132685.9U CN213776785U (en) | 2020-09-25 | 2020-09-25 | Novel air-cooled non-metal expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213776785U true CN213776785U (en) | 2021-07-23 |
Family
ID=76906384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022132685.9U Active CN213776785U (en) | 2020-09-25 | 2020-09-25 | Novel air-cooled non-metal expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213776785U (en) |
-
2020
- 2020-09-25 CN CN202022132685.9U patent/CN213776785U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: HUANENG (SHANGHAI) ELECTRIC POWER MAINTENANCE CO.,LTD. Assignor: HUANENG SHANGHAI GAS TURBINE POWER GENERATION CO.,LTD. Contract record no.: X2023980053901 Denomination of utility model: A new type of air cooled non-metallic expansion joint Granted publication date: 20210723 License type: Common License Record date: 20231225 |
|
| EE01 | Entry into force of recordation of patent licensing contract |