CN220226993U - Expansion joint structure of exhaust outlet of combustion engine - Google Patents
Expansion joint structure of exhaust outlet of combustion engine Download PDFInfo
- Publication number
- CN220226993U CN220226993U CN202321953342.6U CN202321953342U CN220226993U CN 220226993 U CN220226993 U CN 220226993U CN 202321953342 U CN202321953342 U CN 202321953342U CN 220226993 U CN220226993 U CN 220226993U
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- China
- Prior art keywords
- expansion joint
- guide plate
- exhaust outlet
- joint structure
- heat
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- 238000002485 combustion reaction Methods 0.000 title claims description 8
- 238000009413 insulation Methods 0.000 claims abstract description 37
- 229920000742 Cotton Polymers 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 10
- 239000003546 flue gas Substances 0.000 abstract description 10
- 239000007789 gas Substances 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 7
- 229910052755 nonmetal Inorganic materials 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract description 3
- 238000009991 scouring Methods 0.000 abstract description 3
- 238000002407 reforming Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Landscapes
- Thermal Insulation (AREA)
Abstract
The utility model discloses an expansion joint structure of an exhaust outlet of a gas turbine, which comprises an air inlet end, an air outlet end and a heat insulation layer, wherein the air inlet end and the air outlet end are arranged along the exhaust direction, a guide plate is arranged in the expansion joint, one end of the guide plate is fixedly connected with the air inlet end of the expansion joint, and the other end of the guide plate faces the air outlet end. According to the utility model, the guide plate is arranged on the nonmetal expansion joint to guide the high-temperature flue gas excessively, so that the flue gas is prevented from directly scouring the heat insulation cotton, the temperature of the high-temperature flue gas is reduced layer by layer when passing through the heat insulation pillow and the skin, and finally the temperature on the surface of the skin of the nonmetal expansion joint is only within 50 ℃. By reforming the metal expansion joint into the nonmetal expansion joint, the environmental temperature around the equipment is reduced, hidden danger of safe operation of the unit at the place is eliminated, the personal safety of the unit inspection personnel is protected, and the waste and loss of heat are reduced.
Description
Technical Field
The utility model relates to the technical field of combustion engines, in particular to an expansion joint structure of an exhaust outlet of a combustion engine.
Background
The exhaust outlet expansion joints of the Siemens SGT5-4000F type combustion engine and the An Saer more AE94.3A type combustion engine are metal expansion joints, and the effects of compensation, heat preservation and airtight are achieved by utilizing the characteristics of metal. The metal expansion joint is directly contacted with high-temperature flue gas at about 650 ℃, and the refinement and the long-term of the internal heat insulation structure are limited due to the characteristics of the metal expansion joint. Overtemperature phenomenon occurs along with long-time operation and frequent starting and stopping of the unit on the surface of the expansion joint. The surface temperature and the temperature of the two sides of the metal expansion joint are up to 200 ℃ or more, and the highest temperature is up to 300 ℃. The environmental temperature around the equipment is greatly increased, serious hidden danger is brought to the safe production of the unit, and the personal safety of the unit inspection staff is also brought to the larger hidden danger, the heat loss is caused, and the production efficiency of the unit is reduced.
Disclosure of Invention
In order to solve the problem of overtemperature of the surface of the expansion joint skin, the utility model provides a nonmetal expansion joint structure of an exhaust outlet of a gas turbine, which has fine internal heat preservation treatment and capability of coping with frequent start-up and shutdown of a unit, and ensures the heat insulation capability of the expansion joint.
The technical scheme includes that the expansion joint structure of the exhaust outlet of the gas turbine comprises an air inlet end, an air outlet end and a heat insulation layer, wherein the air inlet end and the air outlet end are arranged along the exhaust direction, the heat insulation layer is arranged between the air inlet end and the air outlet end, a guide plate is arranged in the expansion joint, one end of the guide plate is fixedly connected with the air inlet end of the expansion joint, the other end of the guide plate faces the air outlet end, and a certain reserved distance is reserved between the guide plate and the heat insulation layer.
In some embodiments, the air inlet end is provided with a hot end flange, the air outlet end is provided with a cold end flange, and a heat insulating material is fixed between the hot end flange and the cold end flange.
In certain embodiments, the insulating material is insulating cotton.
In certain embodiments, the insulation cotton is wrapped with steel mesh.
In some embodiments, a heat-insulating cotton fixing plate for fixedly supporting the heat-insulating cotton is arranged on the hot end flange.
In some embodiments, the fixing plate is located between the guide plate and the heat insulation cotton, the inner side surface of the fixing plate corresponds to the guide plate, and the outer side surface of the fixing plate is fixed with the inner side surface of the heat insulation cotton.
In certain embodiments, the insulation cotton is provided with an outer insulation layer on the outside, and the outer insulation layer has an outer surface which bulges outwards in a radial direction.
In certain embodiments, radial bolt holes are formed in the hot end flange and the cold end flange, fixed edges corresponding to the radial bolt holes are formed in two ends of the outer heat insulation layer, and the fixed edges are fixed to the bolt holes through bolts.
In some embodiments, the surface of the outer heat insulating layer is covered with a skin, and two ends of the skin are fixed on the bolts through pressing plates.
Compared with the prior art, the utility model has the following beneficial effects:
according to the utility model, the guide plate is arranged on the nonmetal expansion joint to guide the high-temperature flue gas excessively, so that the flue gas is prevented from directly scouring the heat insulation cotton, the temperature of the high-temperature flue gas is reduced layer by layer in the heat insulation layer, and finally, the temperature on the surface of the nonmetal expansion joint skin is only within 50 ℃. By reforming the metal expansion joint into the nonmetal expansion joint, the environmental temperature around the equipment is reduced, hidden danger of safe operation of the unit at the place is eliminated, the personal safety of the unit inspection personnel is protected, and the waste and loss of heat are reduced.
Drawings
The present utility model will now be described in detail with reference to specific embodiments and drawings, which are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the utility model. The drawings illustrate generally, by way of example and not limitation, embodiments discussed herein. Wherein:
FIG. 1 is a schematic view of an expansion joint with a baffle installed.
Fig. 2 is a schematic view of an expansion joint where a heat insulation cotton fixing plate is installed.
Fig. 3 is a schematic view of an expansion joint where insulation wool is installed.
Fig. 4 is a schematic view of an expansion joint where an outer insulation layer is installed.
Figure 5 is a schematic view of the skin at the expansion joint mounted.
In the figure, 1, a deflector; 2. a hot end flange; 3. a cold end flange; 4. thermal insulation cotton; 5. a heat preservation cotton fixing plate; 6. an outer insulation layer; 7. bolt holes; 8. fixing the edges; 9. a skin; 10. a pressing plate; 11. and (5) a bolt.
Detailed Description
The following are specific examples of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these examples, and the following embodiments do not limit the utility models according to the claims. Furthermore, all combinations of features described in the embodiments are not necessarily essential to the inventive solution.
The principles and structures of the present utility model are described in detail below with reference to the drawings and the examples.
Example 1
As shown in fig. 1, 2, 3, 4 and 5, the expansion joint structure of the exhaust outlet of the gas turbine is used for the exhaust outlet of the gas turbine, and comprises an air inlet end, an air outlet end and a heat insulation layer, wherein the air inlet end and the air outlet end are arranged along the exhaust direction, the heat insulation layer is arranged between the air inlet end and the air outlet end, and high-temperature gas exhausted by the gas turbine enters from the air inlet end and is exhausted from the air outlet end after passing through the inner cavity of the expansion joint.
The heat insulation layer is made of inorganic nonmetallic materials and is used for isolating heat and preventing the outer side of the expansion joint from being too high in temperature.
Be provided with guide plate 1 in the expansion joint, guide plate 1's one end with the inlet end fixed connection of expansion joint, guide plate 1's the other end orientation the end of giving vent to anger, guide plate 1 with have certain thermal-insulated interval between the insulating layer for absorb inflation and displacement, guide plate 1 make when the air current passes through can not in insulating layer direct contact to avoid the air current to directly act on thermal insulation cotton, prevent that thermal insulation cotton from being blown out, guarantee the thermal-insulated ability of expansion joint. The guide plate 1 guides the high-temperature flue gas excessively, so that the flue gas is prevented from directly scouring the heat insulation cotton, the temperature of the high-temperature flue gas is reduced layer by layer in the heat insulation pillow, and finally the temperature of the surface of the nonmetallic expansion joint skin 9 is only within 50 ℃.
The air inlet end is provided with a hot end flange 2, the air outlet end is provided with a cold end flange 3, a heat insulation material is fixed between the hot end flange 2 and the cold end flange 3, the heat insulation material in the embodiment is heat insulation cotton 4, steel wire meshes are wrapped outside the heat insulation cotton 4, and the steel wire meshes play a reinforcing role on the heat insulation cotton 4. The heat end flange 2 is provided with a heat-insulating cotton 4 fixing plate for fixedly supporting the heat-insulating cotton 4, the end part of the heat-insulating cotton 4 fixing plate is fixedly connected with the heat end flange 2, the fixing plate is positioned between the guide plate 1 and the heat-insulating cotton 4, the inner side surface of the fixing plate corresponds to the guide plate 1, and the outer side surface of the fixing plate is fixed with the inner side surface of the heat-insulating cotton 4. The fixed plate and the guide plate 1 are provided with a certain separation distance. The length direction of the fixed plate and the guide plate 1 extends from the hot end flange 2 to the cold end flange 3, the width direction of the fixed plate and the guide plate 1 extends from the expansion joint inner cavity circumference, and as a simple scheme, the fixed plate and the guide plate 1 can be of a cylinder structure coaxial with the expansion joint inner cavity.
The heat insulation cotton 4 outside cover has outer insulating layer 6, outer insulating layer 6 has radial outside surface that outwards rises in order to improve thermal-insulated effect, hot end flange 2 with all be provided with bolt 11 hole 7 on the cold end flange 3, outer insulating layer 6 both ends be provided with the fixed limit 8 that bolt 11 hole 7 corresponds, fixed limit 8 passes through bolt 11 to be fixed on the bolt hole, outer insulating layer 6 surface cover has covering 9, covering 9 both ends pass through clamp plate 10 and fix on the bolt 11. The skin 9 is the main telescopic body of the nonmetallic expansion joint, and has the functions of preventing leakage of gas and rainwater and absorbing the expansion amount; the composite material has the functions of heat insulation, temperature resistance, stretching resistance, rebound resilience, durability and the like, and is a high-strength sealing composite material.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.
Claims (9)
1. The utility model provides a gas turbine exhaust outlet expansion joint structure, includes the inlet end that sets up along the exhaust direction with go out the end and be located inlet end and go out the insulating layer between the end, its characterized in that, be provided with the guide plate in the expansion joint, the one end of guide plate with the inlet end fixed connection of expansion joint, the other end orientation of guide plate the end of giving vent to anger, the guide plate with have certain reservation interval between the insulating layer.
2. The exhaust outlet expansion joint structure of a gas turbine according to claim 1, wherein the gas inlet end is provided with a hot end flange, the gas outlet end is provided with a cold end flange, and a heat insulating material is fixed between the hot end flange and the cold end flange.
3. The exhaust outlet expansion joint structure of a combustion engine according to claim 2, wherein the heat insulating material is heat insulating cotton.
4. A gas turbine exhaust outlet expansion joint structure according to claim 3, wherein the insulating cotton is wrapped with steel wire mesh.
5. A gas turbine exhaust outlet expansion joint structure according to claim 3, wherein a heat-insulating cotton fixing plate for fixedly supporting the heat-insulating cotton is arranged on the hot end flange.
6. The exhaust outlet expansion joint structure of a gas turbine according to claim 5, wherein the fixing plate is located between the guide plate and the heat insulation cotton, the inner side surface of the fixing plate corresponds to the guide plate, and the outer side surface of the fixing plate is fixed with the inner side surface of the heat insulation cotton.
7. A gas turbine exhaust outlet expansion joint structure according to claim 3, wherein an outer insulating layer is provided on the outside of the insulating cotton, the outer insulating layer having an outer surface bulging radially outwardly.
8. The expansion joint structure of an exhaust outlet of a combustion engine according to claim 7, wherein bolt holes are formed in the hot end flange and the cold end flange, fixing edges corresponding to the bolt holes are formed in two ends of the outer heat insulation layer, and the fixing edges are fixed to the bolt holes through bolts.
9. The exhaust outlet expansion joint structure of a gas turbine according to claim 8, wherein the outer heat insulating layer is covered with a skin, and both ends of the skin are fixed to the bolts by pressing plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321953342.6U CN220226993U (en) | 2023-07-24 | 2023-07-24 | Expansion joint structure of exhaust outlet of combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321953342.6U CN220226993U (en) | 2023-07-24 | 2023-07-24 | Expansion joint structure of exhaust outlet of combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220226993U true CN220226993U (en) | 2023-12-22 |
Family
ID=89189117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321953342.6U Active CN220226993U (en) | 2023-07-24 | 2023-07-24 | Expansion joint structure of exhaust outlet of combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220226993U (en) |
-
2023
- 2023-07-24 CN CN202321953342.6U patent/CN220226993U/en active Active
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