JPH1047586A - Gas pipeline - Google Patents
Gas pipelineInfo
- Publication number
- JPH1047586A JPH1047586A JP8203414A JP20341496A JPH1047586A JP H1047586 A JPH1047586 A JP H1047586A JP 8203414 A JP8203414 A JP 8203414A JP 20341496 A JP20341496 A JP 20341496A JP H1047586 A JPH1047586 A JP H1047586A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- fixing rib
- gas
- bolt
- welded
- Prior art date
- 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.)
- Granted
Links
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
- F16L59/00—Thermal insulation in general
- F16L59/04—Arrangements using dry fillers, e.g. using slag wool which is added to the object to be insulated by pouring, spreading, spraying or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ガスを移送するガ
ス配管に係り、特に、加圧流動床複合(ＰＦＢＣ)発電プ
ラントの圧力容器とガスタービンとの間に設け、ＰＦＢ
Ｃボイラで生成した高温・高圧の石炭燃焼ガスを移送す
るのに好適なガス配管に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas pipe for transferring gas, and more particularly to a gas pipe provided between a pressure vessel of a pressurized fluidized bed combined (PFBC) power plant and a gas turbine.
The present invention relates to a gas pipe suitable for transferring high-temperature and high-pressure coal combustion gas generated by a C boiler.
【０００２】[0002]
【従来の技術】従来のガス配管として、実開昭60−1609
3 号公報には、圧力管と前記圧力管の内部に形成された
ライナと前記圧力管と前記ライナとの間に設けられた断
熱材とを有し、前記ライナは、一方の端部の外周上に複
数のブラケットが設けられ他方の端部が若干細いライナ
ユニットが、前記ライナユニットの細端部の外周に設け
られるセラミックスを介して軸方向に連結されるもので
あり、前記圧力管の内周には、前記ブラケットに相当す
る位置に支持脚が設けられ、前記支持脚が、前記ブラケ
ットと若干の遊びをもってピン枢着する内部断熱配管が
開示されている。また、実開昭61−123296号公報には、
多数のスリープがその端部をオーバーラップさせた状態
で軸方向に相対移動可能に連結されてなる流体輸送用内
管と、該内管を覆う外管と、前記内管と前記外管との間
に設けられた断熱材と、前記スリープと前記外管との間
に設けられ、これらをその半径方向および軸方向に相対
移動可能に連結する支持金物と、前記断熱材を横断して
内外管の間を液密に遮断する弾性変形可能なリング状の
シールプレートとから成る液体輸送用配管が開示されて
いる。2. Description of the Related Art Conventional gas pipes are disclosed in
Japanese Patent Application Publication No. 3 (1994) has a pressure pipe, a liner formed inside the pressure pipe, and a heat insulating material provided between the pressure pipe and the liner, and the liner has an outer periphery at one end. A liner unit provided with a plurality of brackets thereon and having a slightly thinner end at the other end is connected in the axial direction through ceramics provided on the outer periphery of the thin end of the liner unit. A supporting leg is provided around the periphery at a position corresponding to the bracket, and an internal heat-insulating pipe is disclosed in which the supporting leg is pivotally connected to the bracket with a slight play. Also, in Japanese Utility Model Laid-Open No. 61-123296,
A plurality of sleeps, the inner pipes for fluid transport being connected so as to be relatively movable in the axial direction with their ends overlapping, an outer pipe covering the inner pipe, and the inner pipe and the outer pipe. A heat insulating material provided therebetween, a support metal provided between the sleep and the outer tube, and connecting them so as to be relatively movable in a radial direction and an axial direction thereof; and an inner and outer tube traversing the heat insulating material. There is disclosed a liquid transport pipe including an elastically deformable ring-shaped seal plate which shuts off the space in a liquid-tight manner.
【０００３】[0003]
【発明が解決しようとする課題】上記実開昭60−16093
号公報に記載された内部断熱配管は、ライナの熱膨張の
際の半径方向の編心及び軸方向の移動による断熱効果の
低下を防止し、ライナの支持強度を高めたものであり、
ライナの連結部のガスの漏洩については、配慮されてい
ない。また、内管からブラケット，支持脚を通じて、外
管に熱が伝導し、外管の支持脚の形成部に局所的な高温
部が生じることについても、配慮されていない。Problems to be Solved by the Invention
The internal heat-insulating pipe described in Japanese Patent Laid-Open Publication No. H06-27605 prevents the reduction of the heat insulating effect due to the radial knitting center and the axial movement at the time of thermal expansion of the liner, and enhances the support strength of the liner.
No consideration has been given to gas leakage at the liner connection. Further, no consideration is given to heat conduction from the inner tube to the outer tube through the brackets and the support legs, and the occurrence of local high-temperature portions in the portions where the support legs of the outer tube are formed.
【０００４】また、上記実開昭61−123296号公報に記載
された液体輸送用配管は、内管の半径方向及び軸方向の
熱膨張を吸収するだけでなく、各スリープのオーバーラ
ップ部分から出入りするバイパス流を抑止したものであ
るが、その効果を得るシールプレートの熱応力による疲
労破壊については、配慮されていない。また、前記同様
に、外管に局所的な高温部が生じることについても、配
慮されていない。Further, the liquid transport pipe described in Japanese Utility Model Laid-Open No. 123296/1986 not only absorbs the thermal expansion of the inner pipe in the radial and axial directions, but also enters and exits from the overlap portion of each sleep. However, no consideration is given to the fatigue fracture of the seal plate due to the thermal stress that obtains the effect. Also, as described above, no consideration is given to the occurrence of a local high-temperature portion in the outer tube.
【０００５】本発明の目的は、高温・高圧のガスを移送
するもので、より信頼性を向上したガス配管を提供する
ことにある。An object of the present invention is to provide a gas pipe for transferring high-temperature and high-pressure gas and having improved reliability.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明のガス配管は、複数個の管を軸方向に連設
し、前記管と前記管との連結部に隙間を有する内管と、
前記内管のほぼ同心円状に外設する外管と、前記内管と
前記外管との間に設ける断熱材と、前記内管の外周に、
その内周端を固定する外側に広がった扇状の第一の支持
手段と、前記外管の内周に、その外周端を固定する内側
に狭った扇状の第二の支持手段と、前記第一の支持手段
の外周側と前記第二の支持手段の内周側とを半径方向に
摺接する摺接手段と、周方向に隣り合う２つの前記第一
の支持手段の間を冠着する第一の冠着手段と、周方向に
隣り合う２つの前記第二の支持手段の間を冠着する第二
の冠着手段とを有する。In order to achieve the above-mentioned object, a gas pipe according to the present invention comprises a plurality of pipes connected in an axial direction and having a gap at a connecting portion between the pipes. Tubes and
An outer pipe provided substantially concentrically outside the inner pipe, a heat insulating material provided between the inner pipe and the outer pipe, and an outer periphery of the inner pipe,
A fan-shaped first support means extending outwardly for fixing the inner peripheral end thereof, and a fan-shaped second support means narrowed inwardly for fixing the outer peripheral end to the inner periphery of the outer tube; A sliding contact means for slidingly contacting the outer peripheral side of one supporting means and the inner peripheral side of the second supporting means in a radial direction, and a second contacting means which covers between the two first supporting means adjacent to each other in the circumferential direction. It has one crowning means and second crowning means for crowning between two circumferentially adjacent second supporting means.
【０００７】[0007]
【発明の実施の形態】以下に、本発明の実施例につい
て、図面を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
【０００８】図１〜図３に、本発明のガス配管の第一の
実施例を示す。図１は、ガス配管の側断面図である。図
２は、図１におけるＡ−Ａ方向の断面図である。図３
は、図１におけるＢ部の拡大図であり、ライナの支持構
造の詳細を示す。図中、１は加圧流動床複合（ＰＦＢ
Ｃ）発電プラントのＰＦＢＣボイラで生成した石炭燃焼
ガス（圧力：約０.８８ＭＰａ ，温度：約８７０℃，流
量：約９５０ｔ／ｈ）、２は内圧を保持する外管(材
質：ＳＣＭＶ３，外径：φ２４５０mm，板厚：２５m
m)、３は外管２を保温する保温材（材質：ロックウー
ル）、４は外管２への熱の伝導を抑制するセラミック・
ファイバー状又はコンクリート状の断熱材、５は断熱材
４の飛散を防止するライナ（材質：SUS310S ，外径：φ
１９００mm，板厚：６mm，長さ：１５００mm）、６は円
筒状のギャップリング（材質：SUS310S ，内径：φ１９
００mm，板厚：６mm，長さ：６０mm）、７はライナ５の
半径方向のズレを抑制する円筒状のライナサポートリン
グ（材質：SUS310S ，内径：φ１９１２mm，板厚：１６
mm，長さ：２４５mm）、８はライナ５側に設ける円環状
の固定リブ（材質：SUS310S，内径：φ１９４４mm，外
径：φ２１６０mm，板厚：１６mm)、９は外管２側に設
ける円環状の固定リブ（材質：ＳＣＭＶ３，内径：φ20
40mm，外径：φ２３６８mm，板厚：１６mm）、１０は外
管２側に設ける固定リブ取付リング(材質：ＳＣＭＶ
３，外径：φ２４００mm，板厚：１６mm，長さ：６０m
m)、１１はボルト（材質：SUS310S ，サイズ：Ｍ１６×
１６）、１２，１３はナット（材質：SUS310S ，サイ
ズ：Ｍ１６）、１４はワッシャ（材質：SUS310S ，内
径：φ２０mm，外径：φ５０mm，厚さ：４mm）、１５は
φ２０mmの穴を２０mmスライドさせた長穴を示す。1 to 3 show a first embodiment of a gas pipe according to the present invention. FIG. 1 is a side sectional view of a gas pipe. FIG. 2 is a sectional view taken along the line AA in FIG. FIG.
FIG. 2 is an enlarged view of a portion B in FIG. 1 and shows details of a liner support structure. In the figure, 1 is a pressurized fluidized bed composite (PFB
C) Coal combustion gas generated by the PFBC boiler of the power plant (pressure: about 0.88 MPa, temperature: about 870 ° C., flow rate: about 950 t / h), 2 is an outer pipe holding the internal pressure (material: SCMV3, outer diameter) : Φ2450mm, thickness: 25m
m), 3 is a heat insulating material (material: rock wool) for keeping the outer tube 2 warm, 4 is a ceramic material that suppresses heat conduction to the outer tube 2.
Fiber or concrete insulation, 5 is a liner to prevent the insulation 4 from scattering (Material: SUS310S, outer diameter: φ
1900 mm, thickness: 6 mm, length: 1500 mm), 6 is a cylindrical gap ring (material: SUS310S, inner diameter: φ19)
(00mm, thickness: 6mm, length: 60mm), 7 is a cylindrical liner support ring (material: SUS310S, inner diameter: 1912mm, thickness: 16) for suppressing the deviation of the liner 5 in the radial direction.
mm, length: 245 mm), 8 is an annular fixing rib provided on the liner 5 side (material: SUS310S, inner diameter: 1944 mm, outer diameter: 2160 mm, plate thickness: 16 mm), 9 is an annular ring provided on the outer tube 2 side Fixing ribs (material: SCMV3, inner diameter: φ20
40 mm, outer diameter: φ2368 mm, plate thickness: 16 mm), 10 is a fixed rib mounting ring provided on the outer tube 2 side (material: SCMV)
3, Outer diameter: φ2400mm, thickness: 16mm, length: 60m
m), 11 are bolts (material: SUS310S, size: M16 ×
16), 12 and 13 are nuts (material: SUS310S, size: M16), 14 is a washer (material: SUS310S, inner diameter: φ20mm, outer diameter: φ50mm, thickness: 4mm), and 15 is a 20mm sliding hole of φ20mm. Indicate a slotted hole.
【０００９】内管は、ライナ５が軸方向に、複数個連設
されて成るものであり、ガス配管の製造時に、軸方向に
隣り合う２つのライナ５の間に３５mm程度の隙間を設け
る。ライナ５の一端部の外周に、ギャップリング６を溶
接し、さらにその外周に、ライナサポートリング７の一
端部を溶接する。この時、ライナサポートリング７の他
端部は、ライナ５の間の隙間をオーバーラップするもの
とする。さらに、ライナサポートリング７の外周に、固
定リブ８の内周端を溶接する。一方、外管２の内周に、
固定リブ取付リング１０を溶接し、さらにその内周に、
固定リブ９の外周端を溶接する。この時、溶接時に線膨
張率の相違から生じる最大応力を軽減するために、固定
リブ８及び固定リブ９は、それぞれ、溶接する部材、即
ち、ライナサポートリング７及び固定リブ取付リング１
０と同一材質のものが好ましい。また、異材質であって
も、線膨張率が同程度の材質のものが好ましい。例え
ば、固定リブ取付リング１０の材質を低合金鋼ＳＣＭＶ
３（線膨張率：１４.４１×１０~6／℃，常温)，固定リ
ブ９の材質をステンレス鋼SUS310S線(膨張率：16.68×
１０~6／℃，常温）とすると、溶接時に５０kg／mm2 以
上の応力が発生する。かかる溶接部は、９００℃近い高
温雰囲気中で使用し続けると、２０００回程度の繰返し
負荷により熱疲労が生じる。よって、ライナ５の材質が
SUS310S ならば、ギャップリング６，ライナサポートリ
ング７，固定リブ８の材質もSUS310S であるのが好まし
い。また、外管２の材質がＳＣＭＶ３ならば、固定リブ
９，固定リブ取付リング１０の材質もＳＣＭＶ３である
のが好ましい。The inner pipe is formed by connecting a plurality of liners 5 in the axial direction, and a gap of about 35 mm is provided between two liners 5 adjacent to each other in the axial direction when the gas pipe is manufactured. A gap ring 6 is welded to the outer periphery of one end of the liner 5, and one end of a liner support ring 7 is further welded to the outer periphery. At this time, the other end of the liner support ring 7 overlaps the gap between the liners 5. Further, the inner peripheral end of the fixing rib 8 is welded to the outer periphery of the liner support ring 7. On the other hand, on the inner circumference of the outer tube 2,
The fixed rib mounting ring 10 is welded, and further on its inner periphery,
The outer peripheral end of the fixing rib 9 is welded. At this time, in order to reduce the maximum stress caused by the difference in the coefficient of linear expansion during welding, the fixing rib 8 and the fixing rib 9 are respectively welded members, that is, the liner support ring 7 and the fixing rib mounting ring 1.
The same material as 0 is preferable. Further, even if different materials are used, materials having similar coefficients of linear expansion are preferable. For example, the material of the fixing rib mounting ring 10 is a low alloy steel SCMV.
3 (linear expansion coefficient: 14.41 × 10 6 / ° C., normal temperature), the material of the fixing rib 9 is stainless steel SUS310S wire (expansion coefficient: 16.68 ×
10 ~ 6 / ℃, room temperature) and when, 50 kg / mm 2 or more stress is generated during welding. If such a welded portion is continuously used in a high temperature atmosphere near 900 ° C., thermal fatigue occurs due to a repeated load of about 2000 times. Therefore, the material of the liner 5 is
In the case of SUS310S, it is preferable that the material of the gap ring 6, the liner support ring 7, and the fixing rib 8 is also SUS310S. If the material of the outer tube 2 is SCMV3, the material of the fixing rib 9 and the fixing rib mounting ring 10 is preferably SCMV3.
【００１０】固定リブ９の内周端から半径方向に３０mm
の位置に、周方向に９０度間隔でボルト１１を通すため
のφ２０mmのボルト穴を予め設けておく。そのボルト穴
に、ボルト１１を通し、固定リブ９に溶接する。一方、
固定リブ８の外周端から半径方向に３０mmの位置に、周
方向に９０度間隔で、ボルト１１を通すためのφ２０mm
のボルト穴を、外周端から半径方向に３０mmの位置か
ら、内周方向に２０mmスライドさせて成る長穴１５を予
め設けておく。そして、ボルト１１のネジ部側に、ワッ
シャ１４を通し、固定リブ８の長穴１５を通して、ナッ
ト１２及びナット１３を締める。この時、図３に示すよ
うに、固定リブ８側に位置するナット１２を緩方向（反
時計回り）に、他方のナット１３を締方向（時計回り）
に回し、ナット１２とナット１３とを噛み合わす。これ
により、固定リブ８と固定リブ９とを互いに固定する。[0010] 30 mm in the radial direction from the inner peripheral end of the fixing rib 9
A bolt hole of φ20 mm for passing the bolt 11 at 90 ° intervals in the circumferential direction is provided in advance at the position. The bolt 11 is passed through the bolt hole and welded to the fixing rib 9. on the other hand,
At a position 30 mm in the radial direction from the outer peripheral end of the fixing rib 8, at 90 ° intervals in the circumferential direction, φ20 mm for passing the bolt 11
An elongated hole 15 is prepared in advance by sliding the above bolt hole from the position 30 mm in the radial direction from the outer peripheral end to the inner circumferential direction by 20 mm. Then, the nut 12 and the nut 13 are tightened by passing the washer 14 through the screw portion side of the bolt 11 and the elongated hole 15 of the fixing rib 8. At this time, as shown in FIG. 3, the nut 12 located on the fixing rib 8 side is loosely (counterclockwise) and the other nut 13 is tightened (clockwise).
And the nut 12 and the nut 13 are engaged with each other. Thereby, the fixing rib 8 and the fixing rib 9 are fixed to each other.
【００１１】上記第一の実施例によれば、内管を構成す
るライナ５の連結部に隙間を有するため、石炭燃焼ガス
１の熱による内管の軸方向の熱膨張を許容することがで
きる。ライナ５の連結部にライナサポートリング７を有
するため、断熱材４中へ石炭燃焼ガス１が流入するのを
防止することができる。ライナ５とライナサポートリン
グ７との間にギャップリング６を有するため、製造過程
で生じるライナ５の公差及びライナ５の半径方向の熱膨
張に関わらず、ライナ５が軸方向にスムースに伸縮する
ことができる。固定リブ８と固定リブ９との間にワッシ
ャ１４を有することにより、固定リブ８と固定リブ９と
の接触面積が小さくなり、石炭燃焼ガス１の熱が固定リ
ブ８，固定リブ９等を通じて外管２へ伝導するのを抑制
することができる。これにより、外管２の固定リブ取付
リング１０の形成部にヒートスポット（局所的な高温
部）が生じるのを防止することができる。固定リブ８と
固定リブ９とを、半径方向に長い長穴１５に、ボルト１
１とナット１２，１３で固定するため、ライナ５の半径
方向の熱膨張を許容し、ライナサポートリング７と固定
リブ８との溶接部、或いは固定リブ９と固定リブ取付リ
ング１０との溶接部に、過剰な応力が発生するのを抑制
することができる。ライナ５を支持する支持板が円環状
であり、前記支持板が外管２とライナ５との間をライナ
５の長さで軸方向に区切るため、ライナ５の連結部の隙
間から断熱材４中へ流入した石炭燃焼ガス１が自由対流
するのを防止することができる。これにより、流入した
石炭燃焼ガス１の自由対流により断熱材４の偏在を防止
することができ、外管２の温度が上昇するのを抑制する
ことができる。図４に、本実施例の各位置の温度分布解
析結果を示す。以上のように、外管２にライナ５を支持
する支持構造が、外管２とライナ５との間のガスバイパ
スを防止するガスバイパス防止構造の役割を兼ねるた
め、別途、弾性変形が可能なシールプレート等を設ける
必要がなくなる。これにより、製造過程時の断熱材４の
施工性を向上すると共に、熱応力によるシールプレート
の疲労破壊を防止することができる。According to the first embodiment, since there is a gap in the connecting portion of the liner 5 constituting the inner tube, the axial expansion of the inner tube due to the heat of the coal combustion gas 1 can be allowed. . Since the liner support ring 7 is provided at the connection portion of the liner 5, it is possible to prevent the coal combustion gas 1 from flowing into the heat insulating material 4. Since the gap ring 6 is provided between the liner 5 and the liner support ring 7, the liner 5 can smoothly expand and contract in the axial direction regardless of the tolerance of the liner 5 and the thermal expansion of the liner 5 in the radial direction generated during the manufacturing process. Can be. By providing the washer 14 between the fixing rib 8 and the fixing rib 9, the contact area between the fixing rib 8 and the fixing rib 9 is reduced, and the heat of the coal combustion gas 1 is released through the fixing rib 8, the fixing rib 9, and the like. Conduction to the tube 2 can be suppressed. Thus, it is possible to prevent a heat spot (a local high-temperature portion) from being generated in the portion of the outer tube 2 where the fixed rib attachment ring 10 is formed. The fixing rib 8 and the fixing rib 9 are inserted into the long hole
1 and the nuts 12 and 13, so that the thermal expansion of the liner 5 in the radial direction is allowed, and the welded portion between the liner support ring 7 and the fixed rib 8 or the welded portion between the fixed rib 9 and the fixed rib mounting ring 10 In addition, the occurrence of excessive stress can be suppressed. The support plate for supporting the liner 5 is annular, and the support plate partitions the space between the outer tube 2 and the liner 5 in the axial direction by the length of the liner 5. It is possible to prevent the coal combustion gas 1 flowing therein from free convection. Thereby, the uneven distribution of the heat insulating material 4 can be prevented by the free convection of the inflowing coal combustion gas 1, and a rise in the temperature of the outer pipe 2 can be suppressed. FIG. 4 shows the results of the temperature distribution analysis at each position in this embodiment. As described above, since the support structure for supporting the liner 5 on the outer tube 2 also serves as a gas bypass prevention structure for preventing gas bypass between the outer tube 2 and the liner 5, it is separately elastically deformable. There is no need to provide a seal plate or the like. Thereby, the workability of the heat insulating material 4 during the manufacturing process can be improved, and the fatigue breakage of the seal plate due to thermal stress can be prevented.
【００１２】図５，図６に、本発明のガス配管の第二の
実施例を示す。図５は、前記第一の実施例の図２に相当
するものの１／４断面図である。図６は、前記第一の実
施例の図３に相当するものであり、ライナの支持構造の
詳細を示す。図中、１６はライナ５側に設ける扇状の固
定リブ（固定リブ８をほぼ１８分割したもの）、１７は
外管２側に設ける扇状の固定リブ（固定リブ９をほぼ１
８分割したもの）、１８は布状の断熱材、１９はその長
手方向に長穴１５を有する直方体の熱伸び吸収プレート
（材質：SUS310S ，縦：７０mm，横：５０mm，板厚：１
６mm）、２０は断熱材４中の石炭燃焼ガス１の自由対流
を防止するガスバイパス防止板（材質：SUS310S ，板
厚：６mm）、２１は断熱材４中の石炭燃焼ガス１の自由
対流を防止するガスバイパス防止板（材質：ＳＣＭＶ
３，板厚：６mm）を示す。FIG. 5 and FIG. 6 show a second embodiment of the gas pipe of the present invention. FIG. 5 is a 1/4 sectional view of a part corresponding to FIG. 2 of the first embodiment. FIG. 6 corresponds to FIG. 3 of the first embodiment and shows details of the liner support structure. In the drawing, reference numeral 16 denotes a fan-shaped fixing rib provided on the liner 5 side (fixed rib 8 is substantially divided into 18), and 17 denotes a fan-shaped fixed rib provided on the outer tube 2 side (approximately 1 fixed rib 9).
18 is a cloth-like heat insulating material, 19 is a rectangular parallelepiped thermal expansion absorbing plate having a long hole 15 in the longitudinal direction (material: SUS310S, length: 70 mm, width: 50 mm, plate thickness: 1)
6), 20 is a gas bypass prevention plate (material: SUS310S, plate thickness: 6 mm) for preventing free convection of the coal combustion gas 1 in the heat insulating material 4, and 21 is a free convection of the coal combustion gas 1 in the heat insulating material 4. Gas bypass prevention plate (Material: SCMV)
3, plate thickness: 6 mm).
【００１３】上記第一の実施例と同様に、ライナサポー
トリング７の外周に、周方向に22.5度間隔で、固定リブ
１６の内周端を溶接する。また、固定リブ取付リング１
０の内周に、周方向に２２.５ 度間隔で、固定リブ１７
の外周端を溶接する。固定リブ１７の内周端から半径方
向に３０mmの位置に、ボルト１１を通すためのφ２０mm
のボルト穴を予め設けておく。そのボルト穴に、ボルト
１１を通し、固定リブ１７に溶接する。一方、固定リブ
１６の外周端から半径方向に４０mmの位置に、φ４０mm
のボルト穴を予め設けておく。そして、ボルト１１のネ
ジ部側に、ワッシャ１４を通し、固定リブ１６のボルト
穴を通し、さらに、熱伸び吸収プレート１９の長穴１５
を通し、熱伸び吸収プレート１９を固定リブ１６に溶接
する。そして、上記第一の実施例と同様に、ナット１２
及びナット１３を締める。この時、周方向に隣り合う２
つの固定リブ１６の間と、周方向に隣り合う２つの固定
リブ１７の間との各々に６０mm程度の隙間を設ける。そ
して、固定リブ１６，１７の各々の間の隙間を覆うよう
に、固定リブ１６，１７の各々に、ガスバイパス防止板
２０，２１を溶接する。ガスバイパス防止板２０，２１
の溶接の際、周方向に隣り合う２つの固定リブのうち、
一方の固定リブとの接触面のみを溶接する。また、固定
リブ１６と固定リブ１７との軸方向の間に、断熱材１８
を設ける。As in the first embodiment, the inner peripheral end of the fixing rib 16 is welded to the outer periphery of the liner support ring 7 at intervals of 22.5 degrees in the circumferential direction. Also, fixed rib mounting ring 1
0, and fixed ribs 17 at circumferential intervals of 22.5 degrees.
Weld the outer peripheral edge of. Φ20 mm for passing the bolt 11 at a position 30 mm in the radial direction from the inner peripheral end of the fixing rib 17
Bolt holes are provided in advance. The bolt 11 is passed through the bolt hole and welded to the fixing rib 17. On the other hand, at a position 40 mm in the radial direction from the outer peripheral end of the fixing rib 16,
Bolt holes are provided in advance. Then, the washer 14 is passed through the screw portion side of the bolt 11, the bolt hole of the fixing rib 16 is passed, and the long hole 15
To weld the heat expansion absorbing plate 19 to the fixing rib 16. Then, similarly to the first embodiment, the nut 12
And the nut 13 is tightened. At this time, two adjacent in the circumferential direction
A gap of about 60 mm is provided between each of the two fixing ribs 16 and between two circumferentially adjacent fixing ribs 17. Then, the gas bypass preventing plates 20 and 21 are welded to each of the fixing ribs 16 and 17 so as to cover a gap between each of the fixing ribs 16 and 17. Gas bypass prevention plates 20, 21
At the time of welding, of the two fixing ribs adjacent in the circumferential direction,
Only the contact surface with one fixing rib is welded. A heat insulating material 18 is provided between the fixing rib 16 and the fixing rib 17 in the axial direction.
Is provided.
【００１４】上記第二の実施例によれば、第一の実施例
により得られる効果に加えて、以下のような効果を得
る。即ち、固定リブ１６，１７のそれぞれが、扇状で、
各々の固定リブの間に隙間を有するため、ライナ５等の
周方向の熱伸びを許容することができる。固定リブの間
の周方向の隙間を覆うように、ガスバイパス防止板２
０，２１を溶接するため、断熱材４中に流入した石炭燃
焼ガス１が自由対流するのを防止することができる。固
定リブ１６と固定リブ１７との軸方向の間に設ける断熱
材１８が布状であるため、固定リブ１６と固定リブ１７
との間に設けられた断熱材の飛散を防止することができ
る。固定リブ１６のボルト穴がφ４０mmと、ボルト１１
のネジ部の径に対して大きいため、製造過程で生じる固
定リブ１６のボルト穴と固定リブ１７のボルト穴との公
差にかかわらず、固定リブ１７に溶接されたボルト１１
に、固定リブ１６を容易に通すことができる。そして、
ボルト１１に固定リブ１６を通した後、固定リブ１６に
熱伸び吸収プレート１９を溶接するため、固定リブ１６
と固定リブ１７との周方向のズレを抑制することができ
る。According to the second embodiment, the following effects are obtained in addition to the effects obtained by the first embodiment. That is, each of the fixing ribs 16 and 17 has a fan shape,
Since there is a gap between each fixing rib, circumferential thermal expansion of the liner 5 and the like can be allowed. The gas bypass prevention plate 2 is provided so as to cover the circumferential gap between the fixing ribs.
Since 0 and 21 are welded, it is possible to prevent the coal combustion gas 1 flowing into the heat insulating material 4 from free convection. Since the heat insulating material 18 provided between the fixing rib 16 and the fixing rib 17 in the axial direction is cloth-like, the fixing rib 16 and the fixing rib 17
Can be prevented from being scattered. When the bolt hole of the fixing rib 16 is φ40 mm and the bolt 11
Bolt 11 which is welded to the fixing rib 17 regardless of the tolerance between the bolt hole of the fixing rib 16 and the bolt hole of the fixing rib 17 generated during the manufacturing process.
In addition, the fixing rib 16 can easily pass therethrough. And
After passing the fixing rib 16 through the bolt 11, the fixing rib 16 is welded to the fixing rib 16 with the heat elongation absorbing plate 19.
Circumferential deviation between the fixing rib 17 and the fixing rib 17 can be suppressed.
【００１５】図７，図８に、本発明のガス配管の第三の
実施例を示す。図７は、前記第一の実施例の図２に相当
するものの１／４断面図である。図８は、前記第一の実
施例の図３に相当するものであり、ライナの支持構造の
詳細を示す。図中、２２は扇状の固定リブ（内径がφ１
９９０mmで外径がφ２３１０mmで板厚が１６mmの円環状
の板を３２分割したもの)、２３はボルト(材質：ＳＣＭ
Ｖ３，サイズ：Ｍ１６×１６）、２４はナット（材質：
ＳＣＭＶ３，サイズ：Ｍ１６）、２５はワッシャ（材
質：ＳＣＭＶ３，内径：φ２０mm，外径：φ５０mm，厚
さ：４mm）、２６は断熱材４中の石炭燃焼ガス１の自由
対流を防止する扇状のガスバイパス防止板（材質：SUS3
10S ，内径がφ１９９０mmで外径がφ２３１０mmで板厚
が６mmの円環状の板を２４分割したもの）、２７はライ
ナ５側に設ける円環状の固定リブ（材質：SUS310S ，内
径：φ１９３２mm，外径：φ２１５０mm，板厚：１６m
m）、２８は外管２側に設ける円環状の固定リブ（材
質：ＳＣＭＶ３，内径：φ2190mm，外径：φ２３６８m
m，板厚：１６mm）を示す。FIGS. 7 and 8 show a third embodiment of the gas pipe of the present invention. FIG. 7 is a 1/4 sectional view of the first embodiment corresponding to FIG. FIG. 8 corresponds to FIG. 3 of the first embodiment and shows details of the liner support structure. In the figure, 22 is a fan-shaped fixing rib (inner diameter is φ1
An annular plate having a thickness of 990 mm, an outer diameter of 2310 mm and a thickness of 16 mm is divided into 32 parts, and 23 is a bolt (material: SCM)
V3, size: M16 × 16), 24 are nuts (material:
SCMV3, size: M16), 25 is a washer (material: SCMV3, inner diameter: 20 mm, outer diameter: 50 mm, thickness: 4 mm), 26 is a fan-shaped gas for preventing free convection of the coal combustion gas 1 in the heat insulating material 4. Bypass prevention plate (Material: SUS3
10S, an annular plate having an inner diameter of 1990 mm, an outer diameter of 2310 mm, and a plate thickness of 6 mm divided into 24 parts; and 27, an annular fixing rib provided on the liner 5 side (material: SUS310S, inner diameter: 1932 mm, outer diameter) : Φ2150mm, thickness: 16m
m) and 28 are annular fixing ribs provided on the outer tube 2 side (material: SCMV3, inner diameter: 2190 mm, outer diameter: 2368 m)
m, plate thickness: 16 mm).
【００１６】上記第一の実施例と同様に、ライナサポー
トリング７の外周に、固定リブ２７の内周端を溶接す
る。また、固定リブ取付リング１０の内周に、固定リブ
２８の外周端を溶接する。固定リブ２７の外周端から半
径方向に３０mmの位置に、周方向に２２.５ 度の間隔
で、ボルト１１を通すためのφ２０mmのボルト穴を予め
設けておく。そのボルト穴に、ボルト１１を通し、固定
リブ２７に溶接する。一方、固定リブ２８の内周端から
半径方向に３０mmの位置に、周方向に２２.５ 度の間隔
で、ボルト２３を通すためのφ２０mmのボルト穴を予め
設けておく。そして、そのボルト穴に、ボルト２３を通
し、固定リブ２８に溶接する。一方、固定リブ２２の外
周端から半径方向に３０mmの位置に、ボルト２３を通す
ためのφ２０mmのボルト穴を予め設けておく。また、固
定リブ２２の内周端から半径方向に５０mmの位置に、ボ
ルト１１を通すためのφ２０mmの穴を、内周端から半径
方向に５０mmの位置から、外周方向に２０mmスライドさ
せて成る長穴１５を予め設けておく。そして、ボルト１
１のネジ部側に、ワッシャ１４を通し、固定リブ２２の
長穴１５を通して、上記第一の実施例と同様に、ナット
１２及びナット１３を締める。一方、ボルト２３のネジ
部側に、ワッシャ２５を通し、固定リブ２２のボルト穴
を通して、ナット２４を締める。そして、周方向に隣り
合う２つの固定リブ２２の間の隙間を覆うように、ガス
バイパス防止板２６を溶接する。このガスバイパス防止
板２６の溶接の際、上記第二の実施例と同様に、周方向
に隣り合う２つの固定リブ２２のうち、一方の固定リブ
２２との接触面のみを溶接する。上記第三の実施例によ
れば、前記第一の実施例，前記第二の実施例により得ら
れる効果に加えて、以下のような効果を得る。即ち、固
定リブ２２と固定リブ２７との間にワッシャ１４を有す
ることにより、固定リブ２２と固定リブ２７との接触面
積が小さくなり、固定リブ２７の熱が固定リブ２２に伝
導するのを抑制し、固定リブ２２と固定リブ２８との間
にワッシャ２５を有することにより、固定リブ２２と固
定リブ２８との接触面積が小さくなり、固定リブ２２の
熱が固定リブ２８に伝導するのを抑制する。これによ
り、石炭燃焼ガス１の熱が、外管２に伝導するのを、さ
らに軽減することができる。As in the first embodiment, the inner peripheral end of the fixing rib 27 is welded to the outer periphery of the liner support ring 7. Further, the outer peripheral end of the fixed rib 28 is welded to the inner periphery of the fixed rib mounting ring 10. At a position 30 mm in the radial direction from the outer peripheral end of the fixing rib 27, a bolt hole of φ20 mm for passing the bolt 11 is provided in advance at an interval of 22.5 degrees in the circumferential direction. The bolt 11 is passed through the bolt hole and welded to the fixing rib 27. On the other hand, at a position 30 mm in the radial direction from the inner peripheral end of the fixing rib 28, a bolt hole of φ20 mm for passing the bolt 23 is provided in advance at an interval of 22.5 degrees in the circumferential direction. Then, the bolt 23 is passed through the bolt hole and welded to the fixing rib 28. On the other hand, a bolt hole of φ20 mm for passing the bolt 23 is provided in advance at a position 30 mm radially from the outer peripheral end of the fixing rib 22. Further, a hole of φ20 mm through which the bolt 11 passes is radially moved by 20 mm from a position 50 mm radially from the inner peripheral end to a position 50 mm radially from the inner peripheral end of the fixing rib 22. A hole 15 is provided in advance. And bolt 1
The nut 12 and the nut 13 are tightened in the same manner as in the first embodiment by passing the washer 14 through the screw portion 1 and the elongated hole 15 of the fixing rib 22. On the other hand, the washer 25 is passed through the screw side of the bolt 23, and the nut 24 is tightened through the bolt hole of the fixing rib 22. Then, the gas bypass prevention plate 26 is welded so as to cover the gap between the two fixing ribs 22 adjacent in the circumferential direction. When welding the gas bypass prevention plate 26, only the contact surface with one of the two fixed ribs 22 in the circumferential direction is welded, as in the second embodiment. According to the third embodiment, the following effects are obtained in addition to the effects obtained by the first embodiment and the second embodiment. That is, by providing the washer 14 between the fixing rib 22 and the fixing rib 27, the contact area between the fixing rib 22 and the fixing rib 27 is reduced, and the heat of the fixing rib 27 is suppressed from being conducted to the fixing rib 22. By providing the washer 25 between the fixing ribs 22 and the fixing ribs 28, the contact area between the fixing ribs 22 and the fixing ribs 28 is reduced, and the conduction of heat of the fixing ribs 22 to the fixing ribs 28 is suppressed. I do. Thereby, conduction of the heat of the coal combustion gas 1 to the outer pipe 2 can be further reduced.
【００１７】[0017]
【発明の効果】本発明のガス配管によれば、内管が、複
数個の管を軸方向に連設されて成り、各管の連結部に隙
間を有するため、内管の軸方向の熱膨張を許容すること
ができる。また、内管を外管に支持する支持手段が、扇
状の第一の支持手段と、扇状の第二の支持手段とから成
るため、支持手段の周方向の熱膨張を許容することがで
きる。また、第一の支持手段と第二の支持手段とが、互
いに半径方向に摺接されるため、内管の半径方向の熱膨
張を許容することができる。これにより、内管が周方向
に熱膨張する場合に、内管と第一の支持手段との固定
部、或いは外管と第二の支持手段との固定部に、局所的
な応力が発生するのを抑制することができる。According to the gas pipe of the present invention, since the inner pipe is formed by connecting a plurality of pipes in the axial direction and has a gap at the connecting portion of each pipe, the heat in the axial direction of the inner pipe is obtained. Inflation can be tolerated. In addition, since the support means for supporting the inner pipe to the outer pipe is composed of the fan-shaped first support means and the fan-shaped second support means, it is possible to allow thermal expansion of the support means in the circumferential direction. Moreover, since the first support means and the second support means are slid in contact with each other in the radial direction, thermal expansion of the inner pipe in the radial direction can be allowed. Thereby, when the inner pipe thermally expands in the circumferential direction, local stress is generated in the fixed portion between the inner pipe and the first support means or the fixed portion between the outer pipe and the second support means. Can be suppressed.
【００１８】第一の冠着手段が、周方向に隣り合う２つ
の第一の支持手段の間を冠着し、第二の冠着手段が、周
方向に隣り合う２つの第二の支持手段の間を冠着して、
内管と外管との間を軸方向に区切るため、内管の連結部
から漏洩する内管内部のガスが、内管と外管との間で自
由対流するのを防止することができる。[0018] The first mounting means is mounted between two circumferentially adjacent first support means, and the second mounting means is formed between two circumferentially adjacent second support means. Between the caps,
Since the inner pipe and the outer pipe are partitioned in the axial direction, it is possible to prevent the gas inside the inner pipe leaking from the connection portion of the inner pipe from flowing freely between the inner pipe and the outer pipe.
【００１９】以上により、本発明のガス配管は、熱応力
による疲労損傷、及び熱によるクリープ損傷の発生を低
減でき、より信頼性を向上することができる。As described above, the gas pipe of the present invention can reduce the occurrence of fatigue damage due to thermal stress and creep damage due to heat, and can further improve the reliability.
【図１】本発明のガス配管の第一の実施例の側断面図。FIG. 1 is a side sectional view of a first embodiment of a gas pipe of the present invention.
【図２】図１のＡ−Ａ方向の断面図（支持構造の詳細
図）。FIG. 2 is a cross-sectional view of the AA direction in FIG. 1 (detailed view of a support structure).
【図３】図１のＢ部の拡大図。FIG. 3 is an enlarged view of a portion B in FIG. 1;
【図４】本発明のガス配管の第一の実施例の各部の温度
分布解析結果。FIG. 4 shows a temperature distribution analysis result of each part of the first embodiment of the gas pipe of the present invention.
【図５】本発明のガス配管の第二の実施例の１／４断面
図。FIG. 5 is a quarter sectional view of a second embodiment of the gas pipe of the present invention.
【図６】本発明のガス配管の第二の実施例の支持構造の
詳細図。FIG. 6 is a detailed view of a support structure of a gas pipe according to a second embodiment of the present invention.
【図７】本発明のガス配管の第三の実施例の１／４断面
図。FIG. 7 is a quarter sectional view of a third embodiment of the gas pipe of the present invention.
【図８】本発明のガス配管の第三の実施例の支持構造の
詳細図。FIG. 8 is a detailed view of a support structure of a third embodiment of the gas pipe of the present invention.
１…石炭燃焼ガス、２…外管、３…保温材、４…断熱
材、５…ライナ、６…ギャップリング、７…ライナサポ
ートリング、８，９，１６，１７，２２…固定リブ、１
０…固定リブ取付リング、１１，２３…ボルト、１２，
１３，２４…ナット、１４，２５…ワッシャ、１５…長
穴、１８…断熱材、１９…熱伸び吸収プレート、２０，
２１，２６…ガスバイパス防止板。DESCRIPTION OF SYMBOLS 1 ... Coal combustion gas, 2 ... Outer tube, 3 ... Heat insulation material, 4 ... Heat insulation material, 5 ... Liner, 6 ... Gap ring, 7 ... Liner support ring, 8, 9, 16, 17, 22 ... Fixing rib, 1
0: fixed rib mounting ring, 11, 23: bolt, 12,
13, 24: nut, 14, 25: washer, 15: oblong hole, 18: heat insulating material, 19: thermal expansion absorbing plate, 20,
21, 26 ... gas bypass prevention plate.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 菅原 芳明 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所日立工場内 (72)発明者 一ノ瀬 徳幸 広島県呉市宝町６番９号 バブコック日立 株式会社呉工場内 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yoshiaki Sugawara 3-1-1, Sachimachi, Hitachi-shi, Ibaraki Pref. Hitachi, Ltd. Hitachi Plant (72) Inventor Noriyuki Ichinose 6-9 Takaracho, Kure-shi, Hiroshima Prefecture Babcock Hitachi Kure Factory
Claims (4)
記管との連結部に隙間を有する内管と、前記内管のほぼ
同心円状に外設する外管と、前記内管と前記外管との間
に設ける断熱材とを有するガス配管において、 前記内管の外周に、その内周端を固定する外側に広がっ
た扇状の第一の支持手段と、 前記外管の内周に、その外周端を固定する内側に狭った
扇状の第二の支持手段と、 前記第一の支持手段の外周側と前記第二の支持手段の内
周側とを半径方向に摺接する摺接手段と、 周方向に隣り合う２つの前記第一の支持手段の間を冠着
する第一の冠着手段と、 周方向に隣り合う２つの前記第二の支持手段の間を冠着
する第二の冠着手段とを有することを特徴とするガス配
管。1. An inner pipe having a plurality of pipes connected in the axial direction and having a gap at a connecting portion between the pipes, an outer pipe provided substantially concentrically with the inner pipe, and In a gas pipe having a heat insulating material provided between an inner pipe and the outer pipe, a fan-shaped first supporting means extending outward to fix an inner peripheral end of an outer circumference of the inner pipe, and the outer pipe The inner periphery of the fan-shaped second support means narrowed inward fixing the outer peripheral end thereof, and the outer peripheral side of the first support means and the inner peripheral side of the second support means in the radial direction A sliding contact means for sliding contact, a first mounting means for mounting between two circumferentially adjacent first support means, and a space between two circumferentially adjacent second supporting means. A gas pipe having a second capping means for capping.
設け、その接触面よりも小さい面積の金属製のスペーサ
を有することを特徴とするガス配管。2. The gas pipe according to claim 1, wherein a metal spacer is provided at a contact portion between the first support means and the second support means, and has a smaller area than the contact surface. Gas piping characterized by the following.
を特徴とするガス配管。3. The gas pipe according to claim 1, wherein said sliding contact means has a bolt and two nuts.
ルト穴を有することを特徴とするガス配管。4. The gas pipe according to claim 3, wherein said first support means has a radially long bolt hole on an outer peripheral side thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20341496A JP3550463B2 (en) | 1996-08-01 | 1996-08-01 | Gas piping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20341496A JP3550463B2 (en) | 1996-08-01 | 1996-08-01 | Gas piping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1047586A true JPH1047586A (en) | 1998-02-20 |
| JP3550463B2 JP3550463B2 (en) | 2004-08-04 |
Family
ID=16473686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20341496A Expired - Fee Related JP3550463B2 (en) | 1996-08-01 | 1996-08-01 | Gas piping |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3550463B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019220559A1 (en) * | 2018-05-16 | 2019-11-21 | 三菱日立パワーシステムズ株式会社 | Pipe member, gasification combined power generation device, and pipe member assembly method |
-
1996
- 1996-08-01 JP JP20341496A patent/JP3550463B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019220559A1 (en) * | 2018-05-16 | 2019-11-21 | 三菱日立パワーシステムズ株式会社 | Pipe member, gasification combined power generation device, and pipe member assembly method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3550463B2 (en) | 2004-08-04 |
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