CN113776079B - Air-cooled vertical water-cooled wall middle transition pipe fitting - Google Patents
Air-cooled vertical water-cooled wall middle transition pipe fitting Download PDFInfo
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- CN113776079B CN113776079B CN202111112705.9A CN202111112705A CN113776079B CN 113776079 B CN113776079 B CN 113776079B CN 202111112705 A CN202111112705 A CN 202111112705A CN 113776079 B CN113776079 B CN 113776079B
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- vertical
- cooled
- transition
- pipeline
- transition pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
Abstract
The invention discloses an air-cooled vertical water-cooled wall middle transition pipe fitting, which consists of a plurality of transition pipe units, wherein adjacent transition pipe units are connected through fins; the transition piece unit formed in a unit form is assembled outside the boiler in advance, so that the supporting capacity of the water wall pipe is improved, the structure of the middle transition position can be simplified, and the installation efficiency is improved; compared with the original H-shaped fin transition structure, the transition pipe fitting has narrower fins, simple weld joint structure and difficult cracking; in addition, this transition pipe fitting design has cooling duct, can carry out cooling to transition pipe fitting, effectively solves the problem that intensity reduces under the transition pipe fitting high temperature state, has improved the overall stability of pipe fitting and water-cooling wall.
Description
Technical Field
The invention belongs to the technical field of industrial boilers, and relates to an air-cooled vertical water-cooled wall middle transition pipe fitting.
Background
In a thermal power plant, boiler units in service are designed and manufactured by different boiler manufacturers, and the specific structures of the boiler units are different, such as a boiler water wall split-membrane water wall, a light pipe water wall, a water wall with pins and the like. The structure of the water wall tube panel transition area can be divided into structures such as transition from a lower spiral tube coil to an upper vertical tube panel, transition from a lower vertical tube panel to an upper vertical tube panel, transition from a middle header and the like. For the water-cooled wall with the lower part being the vertical tube panel, the H-shaped fins are usually adopted as transition connecting tubes, but the water-cooled wall is influenced by the factors of wider fins, complex stress, poor control of the welding quality of the fins and the like, the fins are easy to crack, and the operation of a boiler unit is adversely affected. Although related transition pipe fitting patent documents such as CN201821545838 exist, the transition pipe fitting is used for a structure in which a lower spiral pipe ring is transited to an upper vertical pipe panel, and the cooling effect is not good, so that the problem of service strength reduction in a high-temperature environment of a material cannot be effectively solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an air-cooled type vertical water-cooled wall intermediate transition pipe fitting to solve the problems that a fin is easy to crack and the high-temperature strength of the transition pipe fitting is reduced in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
an air-cooled vertical water-cooled wall middle transition pipe fitting comprises a plurality of transition pipe units, wherein each transition pipe unit comprises a vertical section and a horizontal section, the vertical section is integrally connected with two horizontal sections, and the two horizontal sections are symmetrical relative to the middle surface of the vertical section;
the vertical sections are arranged in an array, and two adjacent vertical sections are connected through fins;
the vertical section is internally provided with an upper lead-out pipeline and a lower lead-out pipeline from two ends respectively, and the upper lead-out pipeline and the lower lead-out pipeline are separated; an inlet pipeline is arranged in each horizontal section, the inlet pipeline on the upper part is communicated with the upper outlet pipeline, and the inlet pipeline on the lower part is communicated with the lower outlet pipeline.
The invention is further improved in that:
preferably, the outer diameter of the middle part of the vertical section is larger than that of the two ends.
Preferably, the outer diameter of the inner end part connecting the horizontal section and the vertical section is larger than that of the outer end part.
Preferably, the inner diameters of the upper outlet pipe, the lower outlet pipe and the inlet pipe are equal.
Preferably, the upper outlet pipe and the upper inlet pipe are communicated through an elbow.
Preferably, the lower outlet pipe and the lower inlet pipe are communicated through an elbow.
Preferably, through holes are formed between the upper extraction pipeline and the lower extraction pipeline, adjacent through holes are communicated to form cooling holes, the axes of the cooling holes are perpendicular to the axes of the vertical sections, and the axes of the cooling holes are perpendicular to the axes of the horizontal sections.
Preferably, the cooling holes are arranged in the cooling air duct.
Preferably, the transition duct unit is manufactured by a hot extrusion or hot forging forming technique.
Preferably, the fins and the adjacent transition pipe units are connected by welding.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses an air-cooled vertical water-cooled wall middle transition pipe fitting, which consists of a plurality of transition pipe units, wherein adjacent transition pipe units are connected through fins; the transition piece unit formed in a unit form is assembled outside the boiler in advance, so that the supporting capacity of the water wall pipe is improved, the structure of the middle transition position can be simplified, and the installation efficiency is improved; compared with the original H-shaped fin transition structure, the transition pipe fitting has narrower fins, simple weld joint structure and difficult cracking; in addition, this transition pipe fitting design has cooling duct, can carry out cooling to transition pipe fitting, effectively solves the problem that intensity reduces under the transition pipe fitting high temperature state, has improved the overall stability of pipe fitting and water-cooling wall.
Furthermore, the vertical section and the horizontal section are both of structures with large middle parts and small outer end parts, so that the strength of the transition pipe fitting is ensured, and the transition pipe fitting is conveniently welded with a water wall pipeline.
Furthermore, the inner diameters of the leading-out pipeline and the leading-in pipeline are equal, so that the transmission of fluid media is facilitated, and the flow velocity cannot be influenced by the change of the pipe diameter.
Furthermore, the leading-out pipeline and the leading-in pipeline are communicated through the bent pipe, and resistance in the fluid flowing process is reduced.
Furthermore, a cooling air duct is arranged to cool the whole structure.
Furthermore, the transition pipe fitting adopts a hot extrusion or hot forging forming technology, so that the strength of the transition pipe fitting is improved.
Furthermore, the fins are connected with the transition pipe fitting in a welding mode, and sealing performance is improved.
Drawings
FIG. 1 is a perspective view of an intermediate transition piece of the present invention;
FIG. 2 is a cross-sectional view of an intermediate transition piece of the present invention;
wherein: 1-leading-out pipeline, 2-leading-in pipeline, 3-cooling air duct, 4-cooling hole and 5-fin; 6-a transition pipe unit; 7-bending the pipe; 6-1-vertical section; 6-2-horizontal segment; 1-1-upper leading-out pipeline; 1-2-lower outlet pipeline.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling arrangements; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention discloses an air-cooled vertical water-cooled wall middle transition pipe fitting, which takes transition pipe units 6 as a reference, the transition pipe units 6 are arranged in an array at equal intervals along the horizontal direction, fins 5 are arranged between the adjacent transition pipe units 6, and the fins 5 are of a plate-shaped structure. The fins 5 are connected with the transition pipe unit 6 in a welding mode, and the whole sealing performance is improved.
Specifically, each transition pipe unit 6 comprises a vertical section 6-1 and two horizontal sections 6-2, the axes of the vertical section 6-1 and the horizontal sections 6-2 are vertical, the two horizontal sections 6-2 are fixedly arranged on the vertical section 6-1, the horizontal sections 6-2 and the vertical sections 6-1 are integrally connected, the two horizontal sections 6-2 are symmetrical relative to the middle plane of the vertical section 6-1, and the middle plane is perpendicular to the axis of the vertical section 6-1 and passes through the plane of the middle point of the vertical section 6-1. Thus, along the direction of the array of transition duct units 6, the vertical segments 6-1 are in an equally spaced array, the upper horizontal segments 6-2 are in an equally spaced array, and the lower horizontal segments 6-2 are in an equally spaced array.
the vertical section 6-1 is provided with an upper lead-out pipeline 1-1 and a lower lead-out pipeline 1-2 from two ends inwards along the axis of the vertical section, the upper lead-out pipeline 1-1 and the lower lead-out pipeline 1-1 are not communicated and are mutually isolated, and the cooling hole 4 penetrates through the non-communicated vertical section 6-1.
Each horizontal section 6-2 is provided with an inlet pipeline 2, the inlet pipeline 2 at the upper part is communicated with the upper outlet pipeline 1-1 through an elbow 7, the inlet pipeline 2 at the lower part is communicated with the lower outlet pipeline 1-2 through an elbow 7, and preferably, the radian radius of the elbow 7 is 20mm.
Referring to fig. 1, the end defining the connection of the horizontal section 6-2 and the vertical section 6-1 is an inner end, the other end of the horizontal section 6-2 is an outer end, and both ends of the vertical section 6-1 are outer ends. The inner end of horizontal segment 6-2 has an outer diameter greater than the outer diameter of the outer end, more specifically, the inner end of horizontal segment 6-2 transitions from 32mm outer diameter to 28.6mm outer diameter, and the inner diameter of the lead-in pipe 2 in horizontal segment 6-2 is 17mm. The inner end of the vertical section 6-1 is larger than the diameters of the two outer ends, the outer diameters of the vertical section 6-1 from the inner end to the two outer ends are changed from 32mm to 28.6mm, and the inner diameters of the upper outgoing pipeline 1-1 and the lower outgoing pipeline 1-2 in the vertical section 6-1 are 17mm. The design of the large and small head structures can ensure the strength of the transition pipe fitting and facilitate the welding with the water wall pipeline.
The distance between the center of the inlet pipeline 2 and the center of the upper outlet pipeline 1-1 is 50mm, and the distance between the center of the inlet pipeline 2 and the center of the lower outlet pipeline 1-2 is 50mm.
The transition duct unit 6 is manufactured by a hot extrusion or hot forging molding technique.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The air-cooled type vertical water-cooled wall middle transition pipe fitting is characterized by comprising a plurality of transition pipe units (6), wherein each transition pipe unit (6) comprises a vertical section (6-1) and a horizontal section (6-2), the vertical section (6-1) is integrally connected with the two horizontal sections (6-2), and the two horizontal sections (6-2) are symmetrical relative to the middle surface of the vertical section (6-1);
the vertical sections (6-1) are arranged in an array, and two adjacent vertical sections (6-1) are connected through the fins (5);
the vertical section (6-1) is internally provided with an upper lead-out pipeline (1-1) and a lower lead-out pipeline (1-2) from two ends respectively, and the upper lead-out pipeline (1-1) and the lower lead-out pipeline (1-1) are separated; each horizontal section (6-2) is provided with an inlet pipeline (2), the inlet pipeline (2) at the upper part is communicated with the upper outlet pipeline (1-1), and the inlet pipeline (2) at the lower part is communicated with the lower outlet pipeline (1-2);
through holes are formed between the upper extraction pipeline (1-1) and the lower extraction pipeline (1-2), adjacent through holes are communicated to form cooling holes (4), the axis of each cooling hole (4) is perpendicular to the axis of the vertical section (6-1), and the axis of each cooling hole (4) is perpendicular to the axis of the horizontal section (6-2);
the cooling holes (4) are arranged in the cooling air duct (3);
the outer diameter of the middle part of the vertical section (6-1) is larger than that of the two ends.
2. An air-cooled vertical waterwall intermediate transition piece according to claim 1, wherein the horizontal section (6-2) and the vertical section (6-1) are connected with an inner end outer diameter larger than an outer end outer diameter.
3. An air-cooled vertical waterwall intermediate transition tube according to claim 1, wherein the upper outlet conduit (1-1), lower outlet conduit (1-2) and inlet conduit (2) have equal inside diameters.
4. An air-cooled vertical waterwall intermediate transition piece according to claim 1, wherein the upper outlet conduit (1-1) and the upper inlet conduit (2) are connected by a bend (7).
5. An air-cooled vertical waterwall intermediate transition piece according to claim 1, wherein the lower outlet conduit (1-2) and the lower inlet conduit (2) are connected by a bend (7).
6. An air-cooled vertical waterwall intermediate transition duct according to claim 1, wherein said transition duct unit (6) is made by hot extrusion or hot forging technique.
7. An air-cooled vertical water-cooled wall intermediate transition pipe fitting according to any of claims 1-6, characterised in that the fins (5) and adjacent transition pipe units (6) are welded together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111112705.9A CN113776079B (en) | 2021-09-18 | 2021-09-18 | Air-cooled vertical water-cooled wall middle transition pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111112705.9A CN113776079B (en) | 2021-09-18 | 2021-09-18 | Air-cooled vertical water-cooled wall middle transition pipe fitting |
Publications (2)
| Publication Number | Publication Date |
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| CN113776079A CN113776079A (en) | 2021-12-10 |
| CN113776079B true CN113776079B (en) | 2023-02-24 |
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| CN202111112705.9A Active CN113776079B (en) | 2021-09-18 | 2021-09-18 | Air-cooled vertical water-cooled wall middle transition pipe fitting |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438438A (en) * | 2013-08-26 | 2013-12-11 | 中节环立为（武汉）能源技术有限公司 | Method and device for preventing membrane water wall type boiler from high-temperature corrosion and coking |
| CN104791759A (en) * | 2015-03-31 | 2015-07-22 | 中国神华能源股份有限公司 | Connection fins for being connected among water-cooled tubes on water-cooled boiler wall, method and boiler |
| CN110566995A (en) * | 2019-09-19 | 2019-12-13 | 哈尔滨锅炉厂有限责任公司 | Sealing structure for nozzle tube panel of vertical water wall |
| CN113294805A (en) * | 2021-05-31 | 2021-08-24 | 中冶京诚工程技术有限公司 | Method for installing boiler water-cooled wall |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI124376B (en) * | 2010-01-15 | 2014-07-31 | Foster Wheeler Energia Oy | STEAM BOILER |
| US10253972B2 (en) * | 2016-04-14 | 2019-04-09 | The Babcock & Wilcox Company | Transition casting for boiler with steam cooled upper furnace |
-
2021
- 2021-09-18 CN CN202111112705.9A patent/CN113776079B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438438A (en) * | 2013-08-26 | 2013-12-11 | 中节环立为（武汉）能源技术有限公司 | Method and device for preventing membrane water wall type boiler from high-temperature corrosion and coking |
| CN104791759A (en) * | 2015-03-31 | 2015-07-22 | 中国神华能源股份有限公司 | Connection fins for being connected among water-cooled tubes on water-cooled boiler wall, method and boiler |
| CN110566995A (en) * | 2019-09-19 | 2019-12-13 | 哈尔滨锅炉厂有限责任公司 | Sealing structure for nozzle tube panel of vertical water wall |
| CN113294805A (en) * | 2021-05-31 | 2021-08-24 | 中冶京诚工程技术有限公司 | Method for installing boiler water-cooled wall |
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| CN113776079A (en) | 2021-12-10 |
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