CN112129155A - Spiral finned tube and assembly structure of spiral finned tube and smoke baffle plate - Google Patents
Spiral finned tube and assembly structure of spiral finned tube and smoke baffle plate Download PDFInfo
- Publication number
- CN112129155A CN112129155A CN202011044227.8A CN202011044227A CN112129155A CN 112129155 A CN112129155 A CN 112129155A CN 202011044227 A CN202011044227 A CN 202011044227A CN 112129155 A CN112129155 A CN 112129155A
- Authority
- CN
- China
- Prior art keywords
- tube
- fins
- spiral finned
- fin
- finned tube
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000779 smoke Substances 0.000 title claims abstract description 52
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000003546 flue gas Substances 0.000 claims abstract description 28
- 238000003466 welding Methods 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims 2
- 239000011295 pitch Substances 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract description 31
- 239000002918 waste heat Substances 0.000 abstract description 11
- 238000007789 sealing Methods 0.000 abstract description 5
- 230000004888 barrier function Effects 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
- F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
- F22D1/08—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways the tubes having fins, ribs, gills, corrugations, or the like on their outer surfaces, e.g. in vertical arrangement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
- F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
- F28D1/05316—Assemblies of conduits connected to common headers, e.g. core type radiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a spiral finned tube and an assembly structure of the spiral finned tube and a smoke baffle plate, and belongs to the technical field of power station boilers. The invention comprises a furnace tube and fins which are wound on the middle part of the furnace tube along the axial direction of the furnace tube, wherein the fins are fixed on the outer wall of the furnace tube in a welding mode, and a plurality of circles of movable fins which can slide along the furnace tube in a telescopic way under the action of external force are respectively arranged at two ends of the fins. In the assembly structure of the spiral finned tube and the smoke blocking plate, movable fins at two ends of the spiral finned tube are in elastic contact with the smoke blocking plate, the fins compress the smoke blocking plate under the action of elasticity and cover tube holes, and the spiral finned tube and the smoke blocking plate form a sealing structure at the tube holes. Therefore, the invention effectively avoids the leakage of the flue gas and greatly improves the utilization efficiency of the waste heat of the flue gas; meanwhile, the movable fins can elastically support the smoke blocking plate, and the smoke blocking plate is effectively prevented from vibrating when being washed by smoke.
Description
Technical Field
The invention relates to a spiral finned tube and an assembly structure of the spiral finned tube and a smoke baffle plate, and belongs to the technical field of power station boilers.
Background
The spiral finned tube is a heated surface tube with fins on the outer wall, the fins wound on the middle part of the spiral finned tube are used for expanding the heated area so as to improve the heat exchange efficiency of the spiral finned tube, and light pipes are reserved at two ends of the spiral finned tube and are used for connecting a header. In order to ensure that as much flue gas exchanges heat with the fins on the heating surface as possible and prevent flue gas loss caused by a flue gas corridor formed by the flue gas in the area where the light pipe is located, the installation of the flue gas blocking plate on the tube panel of the spiral finned tube is a necessary means for avoiding flue gas loss. As shown in figure 1, the smoke barrier plate 4 is arranged at the interface position of the light pipe 112 and the fin 12 on the spiral finned tube, the light pipe 112 passes through the tube hole 41 on the smoke barrier plate 4 to be connected with the header 2, and the light pipe 112 and the fin 12 are separated at two sides of the smoke barrier plate 4. In order to avoid that the smoke barrier 4 generates thermal expansion to cause transverse shearing to the light pipe 112 when the waste heat boiler operates, the diameter of the pipe hole 41 must be larger than the outer diameter of the light pipe 112, i.e. a certain gap must be left between the pipe hole 41 and the light pipe 112. Due to the existence of the gap, high-temperature flue gas is inevitably leaked at the pipe hole 41, and although the smoke leakage amount at a single pipe hole 41 is relatively limited, under the condition of large amount of smoke (taking a 9F grade waste heat boiler as an example, 10000 spiral fin pipes are used as the heating surfaces of the fin pipes, and correspondingly 20000 pipe holes matched with the spiral fin pipes are used), the leakage is still a hidden killer which influences the efficient utilization of the waste heat of the flue gas of the waste heat boiler.
Disclosure of Invention
The invention mainly solves the technical defect that flue gas leakage is easy to generate due to the fact that a gap exists between the spiral finned tube and the flue gas blocking plate in the prior art, and provides the spiral finned tube which can be in sealing fit with the flue gas blocking plate so as to avoid generating flue gas leakage.
The invention mainly solves the technical problems through the following technical scheme: the invention comprises a furnace tube and fins spirally wound on the middle part of the furnace tube along the axial direction of the furnace tube, and is characterized in that the middle parts of the fins are fixed on the outer wall of the furnace tube by welding, and two ends of each fin are provided with movable fins which can slide along the furnace tube in a telescopic way under the action of external force.
Preferably, the movable fin is not less than 5 sections.
Preferably, the welding is high-frequency resistance welding.
Preferably, the side of the fin far away from the outer wall of the furnace tube is provided with a toothed sheet.
Therefore, the invention has simple and reasonable structure and the following advantages:
in the invention, the two ends of the fin are provided with the movable fins, and the movable fins are only wound on the spiral finned tube and are not welded and fixed with the tube wall, so that the movable fins can stretch and slide along the axial direction of the spiral finned tube under the action of external force.
When the invention is assembled with the smoke blocking plate, before the smoke blocking plate is positioned and fixed, the smoke blocking plate is pushed to the position contacted with the movable fin towards the direction of the fin, and the smoke blocking plate is continuously pushed to the movable fin to generate elastic shrinkage, and at the moment, the smoke blocking plate is positioned and fixed by utilizing the positioning piece. The movable fin has certain elastic tension after being pressed, and is equivalent to an elastic piece, and the movable fin presses the smoke blocking plate under the action of the elastic force and covers the pipe hole.
Therefore, the invention can form sealing fit with the smoke baffle plate, and solves the technical problem of smoke leakage caused by the assembly clearance between the spiral finned tube and the smoke baffle plate in the prior art.
In the preferred scheme of the invention, the number of the movable fins is not less than 5, so that the movable fins have good elasticity and rigidity. On one hand, the movable fins can be tightly attached to the smoke blocking plate at the pipe holes under the action of elasticity, so that a better sealing effect is achieved; on the other hand, the movable fins can form good elastic support for the smoke blocking plate, and vibration of the smoke blocking plate when the smoke blocking plate is washed by smoke is effectively avoided.
In a preferred embodiment of the invention, the side of the fin facing away from the outside of the furnace tube is provided with fins. The fins with the tooth sheets can be processed by a steel belt through a press. The fins are coiled in the furnace tube through the coiling device, meanwhile, the fins are fixed on the tube wall through high-frequency resistance welding, and coiling and welding are synchronously completed. Therefore, the invention has the advantages of simple structure, convenient manufacture, high production efficiency, low manufacture cost and the like.
The technical problem can be solved by the following technical scheme: the invention comprises a smoke blocking plate and a spiral finned tube, wherein the smoke blocking plate is arranged at the junction position of a light pipe and a fin on the spiral finned tube and is positioned and fixed by a positioning piece, the light pipe penetrates through a tube hole on the smoke blocking plate to be connected with a header, and the positioning piece is fixedly connected with the light pipe.
Preferably, the positioning piece is detachably connected with the furnace tube.
Therefore, the invention has simple and reasonable structure and the following advantages:
in the invention, the heating surface adopts the spiral finned tube provided with the movable fin, and the movable fin has certain elasticity, so that even if the number of the spiral finned tubes is extremely large, the movable fin can be tightly attached to the smoke blocking plate and cover the tube hole under the action of elasticity by pushing the smoke blocking plate towards the direction of the fin when the smoke blocking plate is installed.
Therefore, the invention solves the technical problems in the prior art, effectively avoids the flue gas leakage at the pipe hole, and further realizes the high-efficiency utilization of the flue gas waste heat of the waste heat boiler.
In the preferred scheme of the invention, the positioning piece is detachably connected with the light pipe, so that the positioning piece and the smoke barrier plate can be conveniently installed and removed.
Drawings
FIG. 1 is a schematic view of an assembly structure of a spiral finned tube and a flue gas baffle plate in the prior art;
FIG. 2 is a schematic diagram of a preferred embodiment of the present invention;
FIG. 3 is a schematic view of an assembly structure of a spiral finned tube and a flue gas baffle plate in the invention;
FIG. 4 is a schematic cross-sectional view of a fin of the present invention.
Description of reference numerals: 1. a helical finned tube; 11. a furnace tube; 112. a light pipe; 12. a fin; 121. a movable fin; 1201. a tooth sheet; 2. collecting a box; 3. a positioning member; 4. a flue gas baffle plate; 41. the tube hole.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example 1: as shown in fig. 2 and 4, the present invention includes a furnace tube 11, wherein two ends of the furnace tube 11 are light pipes 112, and the middle of the furnace tube 11 is coiled with fins 12;
the fins 12 are spirally wound on the outer wall of the furnace tube 11, the middle parts of the fins 12 are fixedly connected with the outer wall of the furnace tube 11 through high-frequency resistance welding, and one side of each fin 12, which is far away from the outer wall of the furnace tube 11, is provided with a toothed disc 1201;
two ends of the fin 12 are respectively provided with 5 sections of movable fins 121, and the movable fins 121 can slide along the furnace tube 11 in an axial telescopic manner under the action of external force.
When the invention is manufactured, the furnace tube 11 and the steel belt with the tooth plates 1201 are placed in the coiling device, and the steel belt and the furnace tube 11 are respectively connected with the anode and the cathode of the high-frequency resistance welding machine. When the coiling device is started, the high-frequency resistance welding machine is not electrified, the steel belt is coiled on the outer wall of the furnace tube 11 along the axial direction of the furnace tube 11 to form an 'air coiling' effect, and when the number of the fins reaches 5 sections, the movable fins 121 at the starting end are finished; the coiling is continued, at the moment, the high-frequency resistance welding machine is electrified, and the steel belt is coiled on the furnace tube 11 and is fixed on the outer wall of the furnace tube 11 through high-frequency resistance welding; after the fins reach the set number of the nodes, the fins 12 fixed in the middle are coiled; at the moment, the high-frequency resistance welding machine is powered off, the steel belt continues to be coiled, the 'empty winding' effect is formed again, when the movable fin 121 reaches 5 sections, the movable fin 121 at the tail end is also coiled, at the moment, the coiling device is stopped, the steel belt is cut off at the tail ring position of the fin 12, and the manufacturing of the invention is completed.
Example 2: as shown in figure 3, the smoke barrier comprises a smoke barrier plate 4 and a spiral finned tube 1, wherein the end part of the spiral finned tube 1 is a light pipe 112, the middle part of the spiral finned tube 1 is coiled with fins 12, and the light pipe 112 penetrates through a tube hole 41 on the smoke barrier plate 4 to be connected with a header 2;
the smoke blocking plate 4 is positioned and fixed at the junction of the light pipe 112 and the fins 12 through the positioning piece 3, and the smoke blocking plate 4 is in elastic contact with the movable fins 121; the light pipe 112 and the header 2 are positioned at the outer side of the smoke barrier plate 4, the fins 12 are separated at the inner side of the smoke barrier plate 4, and the movable fins 121 are pressed tightly against the smoke barrier plate 4 at the pipe holes 41 under the action of elasticity and cover the pipe holes 41;
the positioning pieces 3 are distributed on the smoke barrier plate 4 and are fixedly connected with the light pipe 112 in a detachable connection mode.
When high-temperature flue gas flows through the fin heating surfaces on the spiral finned tubes in the operation process of the waste heat boiler, the movable fins and the flue gas blocking plates form sealing connection at the pipe holes, so that the leakage of the high-temperature flue gas cannot be generated at the pipe holes.
Therefore, the utilization efficiency of the waste heat of the flue gas of the waste heat boiler is improved; meanwhile, the smoke blocking plate and the movable fins are in elastic contact, and the movable fins can provide elastic support for the smoke blocking plate, so that the smoke blocking plate is effectively prevented from vibrating when being washed by smoke, and the operation safety of the waste heat boiler is guaranteed.
Of course, the drawings and examples are only for the purpose of illustrating and explaining the present invention and should not be taken as unduly limiting the invention. All technical solutions which are equivalent to each other and can be obtained by a person skilled in the art according to the present invention fall within the protection scope of the present invention.
Claims (7)
1. The spiral finned tube comprises a furnace tube (11), and fins (12) which are spirally wound in the middle of the furnace tube (11) along the axial direction of the furnace tube (11), and is characterized in that the middle of each fin (12) is fixed on the outer wall of the furnace tube (11) through welding, and movable fins (121) which can slide in a telescopic manner along the furnace tube (11) under the action of external force are arranged at two ends of each fin (12).
2. A turn-fin tube according to claim 1, wherein the movable fin (121) is not less than 5 pitches.
3. A turn-fin tube according to claim 1 or 2, wherein the welding is high-frequency resistance welding.
4. A turn-fin tube according to claim 1 or 2, characterised in that the fins (12) are provided with serrations (1201) on the side remote from the tube (11).
5. A turn-fin tube according to claim 3, characterised in that the fins (12) are provided with serrations (1201) on the side remote from the tube (11).
6. The utility model provides an assembly structure of spiral finned tube and flue gas baffler, includes flue gas baffler (4), spiral finned tube (1), flue gas baffler (4) set up on spiral finned tube (1) light pipe (112) with the boundary position of fin (12) is fixed a position through setting element (3), light pipe (112) pass pore (41) on flue gas baffler (4) are connected with header (2), setting element (3) with light pipe (112) fixed connection, its characterized in that, spiral finned tube (1) is any one spiral finned tube of claim 1-5, activity fin (121) elasticity compresses tightly flue gas baffler (4) and closing cap pore (41).
7. The assembly structure of the spiral finned tube and the smoke baffle plate as claimed in claim 6, wherein the positioning piece (3) is detachably connected with the furnace tube (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011044227.8A CN112129155A (en) | 2020-09-28 | 2020-09-28 | Spiral finned tube and assembly structure of spiral finned tube and smoke baffle plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011044227.8A CN112129155A (en) | 2020-09-28 | 2020-09-28 | Spiral finned tube and assembly structure of spiral finned tube and smoke baffle plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112129155A true CN112129155A (en) | 2020-12-25 |
Family
ID=73844401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011044227.8A Pending CN112129155A (en) | 2020-09-28 | 2020-09-28 | Spiral finned tube and assembly structure of spiral finned tube and smoke baffle plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112129155A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175685A (en) * | 2021-04-23 | 2021-07-27 | 华能洋浦热电有限公司 | Flue gas guide system and gas turbine exhaust-heat boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030034868A (en) * | 2001-10-29 | 2003-05-09 | 두산중공업 주식회사 | A waste heat recovery boiler with fin tube sliding guides |
| KR20110019107A (en) * | 2009-08-19 | 2011-02-25 | (주)디케이티 | Method for manufacturing fin tube in the process of making fin tube in order to recovery of wasted heat for boiler |
| CN201772438U (en) * | 2010-03-19 | 2011-03-23 | 夏嘉琪 | Spiral finned tube type boiler waste heat recycling device |
| CN103307910A (en) * | 2013-06-24 | 2013-09-18 | 华北电力大学 | Anti-corrosion and dirt-resistant efficient flue gas waste heat recovery device |
| CN207990649U (en) * | 2018-02-08 | 2018-10-19 | 东方菱日锅炉有限公司 | The internal structure of waste heat boiler flue |
| CN209415428U (en) * | 2018-11-21 | 2019-09-20 | 东方菱日锅炉有限公司 | The connection structure of exhaust-heat boiler flue gas baffler |
| CN210267713U (en) * | 2019-08-12 | 2020-04-07 | 山西鑫博锅炉有限公司 | Special energy-saving device for boiler |
| CN214250706U (en) * | 2020-09-28 | 2021-09-21 | 东方菱日锅炉有限公司 | Spiral finned tube and assembly structure of spiral finned tube and smoke baffle plate |
-
2020
- 2020-09-28 CN CN202011044227.8A patent/CN112129155A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030034868A (en) * | 2001-10-29 | 2003-05-09 | 두산중공업 주식회사 | A waste heat recovery boiler with fin tube sliding guides |
| KR20110019107A (en) * | 2009-08-19 | 2011-02-25 | (주)디케이티 | Method for manufacturing fin tube in the process of making fin tube in order to recovery of wasted heat for boiler |
| CN201772438U (en) * | 2010-03-19 | 2011-03-23 | 夏嘉琪 | Spiral finned tube type boiler waste heat recycling device |
| CN103307910A (en) * | 2013-06-24 | 2013-09-18 | 华北电力大学 | Anti-corrosion and dirt-resistant efficient flue gas waste heat recovery device |
| CN207990649U (en) * | 2018-02-08 | 2018-10-19 | 东方菱日锅炉有限公司 | The internal structure of waste heat boiler flue |
| CN209415428U (en) * | 2018-11-21 | 2019-09-20 | 东方菱日锅炉有限公司 | The connection structure of exhaust-heat boiler flue gas baffler |
| CN210267713U (en) * | 2019-08-12 | 2020-04-07 | 山西鑫博锅炉有限公司 | Special energy-saving device for boiler |
| CN214250706U (en) * | 2020-09-28 | 2021-09-21 | 东方菱日锅炉有限公司 | Spiral finned tube and assembly structure of spiral finned tube and smoke baffle plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113175685A (en) * | 2021-04-23 | 2021-07-27 | 华能洋浦热电有限公司 | Flue gas guide system and gas turbine exhaust-heat boiler |
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