CN111853372A - Furnace bottom wall-penetrating expansion joint - Google Patents
Furnace bottom wall-penetrating expansion joint Download PDFInfo
- Publication number
- CN111853372A CN111853372A CN202010836925.5A CN202010836925A CN111853372A CN 111853372 A CN111853372 A CN 111853372A CN 202010836925 A CN202010836925 A CN 202010836925A CN 111853372 A CN111853372 A CN 111853372A
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- Prior art keywords
- heat
- fixed
- insulating layer
- insulation layer
- fixed heat
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- 238000009413 insulation Methods 0.000 claims abstract description 61
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000002121 nanofiber Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 abstract description 16
- 238000006073 displacement reaction Methods 0.000 abstract description 7
- 238000004321 preservation Methods 0.000 description 10
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
Images
Classifications
-
- 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
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
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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
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
-
- 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
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/16—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like
- F16L59/21—Arrangements specially adapted to local requirements at flanges, junctions, valves or the like adapted for expansion-compensation devices
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a furnace bottom wall-penetrating expansion joint which is used for wall-penetrating heat insulation and displacement offset of a pipeline of a waste heat boiler furnace bottom, wherein a fixed heat insulation layer IV is filled between a connecting pipe and a heat insulation lining plate on the inner side and is connected and fixed into a whole by a plurality of studs uniformly distributed on the circumference; the inner ring of the heat-insulation lining plate is sequentially stacked with a fixed heat-insulation layer III, a fixed heat-insulation layer II and a fixed heat-insulation layer I, the positions of the fixed heat-insulation layer I, the fixed heat-insulation layer II and the fixed heat-insulation layer III are fixed by binding steel belts, the lower ends of the fixed heat-insulation layer I, the fixed heat-insulation layer II and the fixed heat-insulation layer III extend downwards and are placed on a table board of a frame at the lower end of the fixed heat-insulation layer I, the upper end of an arched arc-shaped telescopic body is sleeved with a connecting pipe 1 and is provided with a hoop I to be fastened, the lower end of the arched arc-shaped telescopic body is connected with the frame and is provided with a hoop II to be fastened, and the connecting positions of the upper.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a furnace bottom wall-penetrating expansion joint.
Background
High temperature steam of gas turbine power plant's exhaust-heat boiler's high temperature steam carries out outside region from the bottom and recycles, conventional exhaust-heat boiler's pipeline connected mode is pure tube coupling, and wear the wall and go out in the boiler room, during the pipeline of high temperature wears the wall, because pipeline temperature is high, in order to avoid wall high temperature to toast the hidden danger that leads to the fracture even progressively to sink, and simultaneously, pipeline expend with heat and contract with cold can drive the wall body simultaneously and remove, for this reason, in the practical application, high temperature pipeline and wall can not direct contact, often reserve a diameter on the wall and be greater than the round hole of a plurality of centimetres of high temperature pipeline, high temperature pipeline passes through in the wall hole of reserving, the drawback of similar wall-: firstly, the method comprises the following steps: the wall-penetrating part of the pipeline is difficult to preserve heat, or the pipeline is not easy to be coated with heat preservation materials; secondly, the gap between the reserved wall hole and the pipeline is not easy to be closed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a furnace bottom wall-penetrating expansion joint which is used for wall-penetrating heat insulation and displacement offset of a waste heat boiler, wherein a fixed heat insulation layer IV is filled between a connecting pipe and a heat insulation lining plate at the inner side and is connected and fixed into a whole by a plurality of studs uniformly distributed on the circumference; the inner ring of the heat-insulation lining plate is sequentially stacked with a fixed heat-insulation layer III, a fixed heat-insulation layer II and a fixed heat-insulation layer I, the positions of the fixed heat-insulation layer I, the fixed heat-insulation layer II and the fixed heat-insulation layer III are fixed by binding steel belts, the lower ends of the fixed heat-insulation layer I, the fixed heat-insulation layer II and the fixed heat-insulation layer III extend downwards and are placed on a table board of a frame at the lower end, the upper end of an arched arc-shaped telescopic body is sleeved with a connecting pipe 1 and is provided with a hoop I for surrounding and fastening, the lower end of the arched arc-shaped telescopic body is connected with the frame and is provided with a hoop II for fastening, and the connecting positions of the upper end and the lower end of the telescopic body are limited by the axial.
In order to achieve the purpose, the technical scheme of the invention is as follows: a furnace bottom wall-penetrating expansion joint is used for connecting a waste heat boiler furnace bottom and a conveying pipeline outside a wall and comprises a connecting pipe, wherein a heat insulation lining plate is arranged on the inner side of the connecting pipe, a fixed heat insulation layer IV is filled between the connecting pipe and the heat insulation lining plate, and the connecting pipe, the fixed heat insulation layer IV and the heat insulation lining plate are connected and fixed into a whole by a plurality of studs uniformly distributed on the circumference;
the inner ring of the heat insulation lining plate is stacked with a fixed heat insulation layer III, the inner ring of the fixed heat insulation layer III is stacked with a fixed heat insulation layer II, the inner ring of the fixed heat insulation layer II is stacked with a fixed heat insulation layer I, and the fixed heat insulation layer I, the fixed heat insulation layer II and the fixed heat insulation layer III are fixed by fastening steel belts;
the first fixed heat-insulating layer, the second fixed heat-insulating layer and the third fixed heat-insulating layer which are the same in length extend downwards and are placed on the table top of the lower-end frame;
the orifice at the upper end of the telescopic body with the arc shape is sleeved with the outer buckle at the lower edge of the connecting pipe, and the sleeved part of the telescopic body and the connecting pipe is provided with a hoop I for surrounding and fastening;
the orifice at the lower end of the telescopic body is sleeved on the outer circumference of the frame at the lower end, the arc groove at the lower end of the arc inner cavity of the telescopic body is positioned and connected with the anti-drop ring at the outer end of the upper edge opening of the frame, and the hoop II 7 is sleeved on the outer circumference at the lower end of the telescopic body to surround and fasten the frame and the lower end of the telescopic body.
And the upper end of the telescopic body is connected with the lower end of the lower edge of the connecting pipe in a positioning way by an anti-drop ring arranged in the lower end of the sleeving position.
And further arranging that the fixed insulating layer is made of nano fibers.
And further setting the materials of the second fixed heat-insulating layer, the third fixed heat-insulating layer and the fourth fixed heat-insulating layer to be ceramic fibers.
Further, the telescopic body is made of a composite material.
The connecting pipe, the stud, the anti-drop ring, the hoop II, the tightening steel belt and the hoop I are all made of stainless steel.
The invention has the beneficial effects that: the invention is used for the through-wall connection of the bottom of the waste heat boiler, effectively absorbs the displacement generated by the high temperature of the bottom of the waste heat boiler, has good heat preservation function and avoids the accidents of cracking and even collapse caused by the heating of the wall body.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is an enlarged view of the connection end of the telescopic body and the anti-drop ring in FIG. 1;
FIG. 3 is an enlarged view of the connection end of the connection tube and the telescopic body in FIG. 1;
fig. 4 is a schematic view of the installation of the residual heat output connecting pipe at the bottom of the residual heat boiler shown in fig. 1.
In the figure: the device comprises a connecting pipe 1, a heat insulation lining plate 2, a stud 3, a hoop I4, a telescopic body 5, an anti-falling ring 6, a hoop II 7, a frame 8, a fixed heat insulation layer I9, a fixed heat insulation layer II 10, a fixed heat insulation layer III 11, a fixed heat insulation layer IV 12, a binding steel belt 13, a furnace bottom waste heat output connecting pipe 14 and an external output pipe 15.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
As shown in figures 1, 2 and 3, the furnace bottom wall-penetrating expansion joint is used for the wall-penetrating connection of pipelines of the furnace bottom of a waste heat boiler, a fixed heat-insulating layer four 12 is filled between a connecting pipe 1 and a heat-insulating lining plate 2, and is connected and fixed into a whole by a plurality of studs 3 which are uniformly distributed on the circumference, so that the strength is high, the stress absorption is uniform, and a good heat-insulating function is realized.
The inner ring of the heat preservation lining plate 2 is sequentially laminated with a third fixed heat preservation layer 11, a second fixed heat preservation layer 10 and a first fixed heat preservation layer 9, every adjacent fixed heat preservation layers are fixed by a binding steel belt 13, a through hole type inner cavity is reserved on the first fixed heat preservation layer 9, a movably butted furnace bottom waste heat output connecting pipe 14 and an external output pipe 15 can be wrapped and connected into a channel communicated with a pipeline, and multiple layers of heat preservation can lock the medium in the furnace bottom waste heat output connecting pipe 14 and the medium in the external output pipe 15 at high temperature to avoid leakage, so that the heat energy transfer of the wall body with the expansion joint in direct contact is minimized, the self heat absorption of the wall body is minimized, and the thermal expansion and cold shrinkage and axial stretching displacement of the wall.
The first fixed heat-insulation layer 9, the second fixed heat-insulation layer 10 and the third fixed heat-insulation layer 11 which are the same in length extend downwards and are placed on the table top of the lower-end frame 8, the axial positions of the first fixed heat-insulation layer 9, the second fixed heat-insulation layer 10 and the third fixed heat-insulation layer 11 are limited, and the phenomenon that the first fixed heat-insulation layer 9, the second fixed heat-insulation layer 10 and the third fixed heat-insulation layer 11 stretch out and draw back to cause displacement in a long-term expansion and contraction.
The upper end of the telescopic body 5 with the arc shape is sleeved with the lower edge of the connecting pipe 1, and the sleeved part is provided with a hoop I4 for surrounding and fastening; the lower end of the telescopic body 5 is sleeved with the outer circumference of the frame 8, the sleeved part is provided with a hoop II 7 to surround and fasten, the upper end of the telescopic body 5 is positioned and connected with the lower end of the lower edge of the connecting pipe 1 along the sleeved position, and the upper end of the telescopic body 5 is prevented from being gradually separated from the connecting pipe 1 due to movement of the telescopic body 5 during axial deformation; the arc groove at the lower end of the arc inner cavity of the telescopic body 5 is connected with the anti-drop ring 6 at the outer end of the upper edge opening of the frame 8 in a positioning way, so that the phenomenon that the lower end interface is separated from the frame 8 gradually due to the movement of the telescopic body 5 during axial deformation is avoided.
The first fixed heat-insulating layer 9 is made of nano fibers, and has good flexibility, good moisture absorption and resistance, good heat-insulating property and low heat conductivity.
The second fixed heat-insulating layer 10, the third fixed heat-insulating layer 11 and the fourth fixed heat-insulating layer 12 are made of ceramic fibers, and are light in weight, high-temperature resistant, good in thermal stability, low in heat conductivity and good in vibration resistance.
The telescopic body 5 is made of a composite material, and has the advantages of light weight, high strength, corrosion resistance, acid and alkali resistance, salt mist resistance, aging resistance, impact resistance and strong environmental adaptability.
The connecting pipe 1, the stud 3, the anti-drop ring 6, the hoop II 7, the tightening steel belt 13 and the hoop I4 are all made of SUS304 stainless steel, and the connecting pipe is stable in performance, high in strength, high-temperature resistant and corrosion resistant.
In practical application, as shown in fig. 4, the expansion energy-saving direct wall-penetrating in the technical scheme is arranged in the air of a wall body, the diameter of a hole of the wall body is consistent with the diameter of a connecting pipe 1, direct contact type installation without a gap can be achieved, a furnace bottom waste heat output connecting pipe 14 and an external output pipe 15 are oppositely inserted and installed in a through hole formed by a first fixed heat-insulating layer 9, an anchor ear 4 and an anchor ear 7 are further tightened to ensure that the through hole formed by the first fixed heat-insulating layer 9 is radially, seamlessly and flexibly connected with the outer diameters of the furnace bottom waste heat output connecting pipe 14 and the external output pipe 15, axial displacement between the furnace bottom waste heat output connecting pipe 14 and the external output pipe 15 caused by temperature can be automatically absorbed and buffered, a plurality of layers of fixed heat-insulating layers with low heat conductivity are wrapped outside the furnace bottom waste heat output connecting pipe 14 and the external output pipe 15, heat in the furnace bottom waste heat, the expansion joint of the through wall is in normal temperature contact with the wall contact surface, so that the high temperature of the through wall contact part is eliminated, and the potential safety hazard of cracking or collapse of the wall due to long-term high temperature is synchronously eliminated.
The thermal insulation material of expansion joint self among this technical scheme is flexible, has little heat absorption when expansion joint inside to produce a little thermal expansion often, can absorb and cushion automatically, and the circular arc arch of expansion body 5 self can absorb and cushion a little thermal expansion simultaneously to when thermal expansion or the shrinkage that ambient temperature leads to, the circular arc arch of expansion body 5 can automatically regulated deformation, and keep flexible contact state with the wall hole pore wall of the wall hole of wearing.
The wall-penetrating connection structure is used for wall-penetrating connection of the bottom of the waste heat boiler, effectively absorbs displacement generated by high temperature of the bottom of the waste heat boiler, has a good heat preservation function, can penetrate through a wall in a contact manner with the wall hole wall of the wall hole, and eliminates the accidents of cracking and even collapse of the wall caused by heating.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will also be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a stove bottom through-wall expansion joint, is used for exhaust-heat boiler stove bottom to wear the wall with the outer pipeline of wall to be connected which characterized in that: the heat-insulation pipe comprises a connecting pipe (1), wherein a heat-insulation lining plate (2) is arranged on the inner side of the connecting pipe (1), a fixed heat-insulation layer four (12) is filled between the connecting pipe (1) and the heat-insulation lining plate (2), and the connecting pipe (1), the fixed heat-insulation layer four (12) and the heat-insulation lining plate (2) are connected and fixed into a whole by a plurality of studs (3) uniformly distributed on the circumference;
a fixed heat-insulating layer III (11) is stacked on the inner ring of the heat-insulating lining plate (2), a fixed heat-insulating layer II (10) is stacked on the inner ring of the fixed heat-insulating layer III (11), a fixed heat-insulating layer I (9) is stacked on the inner ring of the fixed heat-insulating layer II (10), and the fixed heat-insulating layer I (9), the fixed heat-insulating layer II (10) and the fixed heat-insulating layer III (11) are fixed by fastening steel belts (13);
the fixed insulating layer I (9), the fixed insulating layer II (10) and the fixed insulating layer III (11) which are the same in length all extend downwards and are placed on the table top of the lower-end frame (8);
an orifice at the upper end of the telescopic body (5) with an arc shape is sleeved with the outer buckle at the lower edge of the connecting pipe (1), and a hoop I (4) is arranged at the sleeved position of the telescopic body (5) and the connecting pipe (1) to surround and fasten;
the orifice at the lower end of the telescopic body (5) is sleeved on the outer circumference of the frame (8) at the lower end, the arc groove at the lower end of the arc inner cavity of the telescopic body (5) is positioned and connected with the anti-drop ring (6) at the outer end of the upper edge opening of the frame (8), and the hoop II (7) is sleeved on the outer circumference at the lower end of the telescopic body (5) to surround and fasten the frame (8) and the lower end of the telescopic body (5).
2. The furnace bottom through-wall expansion joint of claim 1, wherein: the upper end of the telescopic body (5) is connected with the lower end of the lower edge of the connecting pipe (1) in a positioning way by an anti-drop ring (6).
3. The furnace bottom through-wall expansion joint of claim 1, wherein: the first fixed insulating layer (9) is made of nano fibers.
4. The furnace bottom through-wall expansion joint of claim 1, wherein: and the fixed insulating layer II (10), the fixed insulating layer III (11) and the fixed insulating layer IV (12) are made of ceramic fibers.
5. The furnace bottom through-wall expansion joint of claim 1, wherein: the material of the telescopic body (5) is a composite material.
6. The furnace bottom through-wall expansion joint of claim 1, wherein: the connecting pipe (1), the stud (3), the anti-drop ring (6), the hoop II (7), the tightening steel belt (13) and the hoop I (4) are all made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010836925.5A CN111853372A (en) | 2020-08-19 | 2020-08-19 | Furnace bottom wall-penetrating expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010836925.5A CN111853372A (en) | 2020-08-19 | 2020-08-19 | Furnace bottom wall-penetrating expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111853372A true CN111853372A (en) | 2020-10-30 |
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ID=72970349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010836925.5A Pending CN111853372A (en) | 2020-08-19 | 2020-08-19 | Furnace bottom wall-penetrating expansion joint |
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| Country | Link |
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| CN (1) | CN111853372A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923063A (en) * | 2022-04-27 | 2022-08-19 | 华能桐乡燃机热电有限责任公司 | Heat preservation structure of waste heat boiler wall penetrating pipe of gas turbine power plant |
-
2020
- 2020-08-19 CN CN202010836925.5A patent/CN111853372A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114923063A (en) * | 2022-04-27 | 2022-08-19 | 华能桐乡燃机热电有限责任公司 | Heat preservation structure of waste heat boiler wall penetrating pipe of gas turbine power plant |
| CN114923063B (en) * | 2022-04-27 | 2023-08-22 | 华能桐乡燃机热电有限责任公司 | Heat insulation structure of exhaust-heat boiler through-wall pipe of gas turbine power plant |
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