JPH061042B2 - Cage type heat retaining device for turbine casing - Google Patents
Cage type heat retaining device for turbine casingInfo
- Publication number
- JPH061042B2 JPH061042B2 JP59036050A JP3605084A JPH061042B2 JP H061042 B2 JPH061042 B2 JP H061042B2 JP 59036050 A JP59036050 A JP 59036050A JP 3605084 A JP3605084 A JP 3605084A JP H061042 B2 JPH061042 B2 JP H061042B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- turbine casing
- heat retaining
- heat insulating
- type heat
- 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.)
- Expired - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/14—Casings modified therefor
- F01D25/145—Thermally insulated casings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Description
【発明の詳細な説明】 〔発明の利用分野〕 本発明は保温装置、主として蒸気タービンの鋳鋼製品、
例えばタービンケーシング、バルブケーシングの保温装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Application of the Invention The present invention relates to a heat insulating device, mainly a cast steel product of a steam turbine,
For example, the present invention relates to a heat insulating device for a turbine casing and a valve casing.
蒸気タービンに於いては、タービンケーシング外表面か
らの熱の逸散を防止する事が、タービンの熱効率を向上
する為に極めて重要である。In a steam turbine, preventing the dissipation of heat from the outer surface of the turbine casing is extremely important for improving the thermal efficiency of the turbine.
この為従来蒸気タービンに於いては第１図に示す如くタ
ービンケーシング１の保温装置は、第２図及び第３図に
示す様に、タービンケーシング１の外表面１ａ上に金網
４を介して、水練り保温材５からなる第１保温層６１、
を成形し、この第１保温６１の外側に珪酸カルシウム７
ａ，７ｂを積層して任意数例えば、２つの第２、第３保
温層６２，６３を針金８を介して積層し、この外側にタ
ービンケーシング外表面１ａに固定したボルト３に取付
けた金網４と仕上セメント９からなる最終保温層６４を
設けた構造からなる。Therefore, in the conventional steam turbine, as shown in FIG. 1, the heat retaining device for the turbine casing 1 is, as shown in FIGS. 2 and 3, provided on the outer surface 1a of the turbine casing 1 with the wire mesh 4 interposed therebetween. A first heat insulating layer 6 1 made of a water kneading heat insulating material 5,
And the calcium silicate 7 is formed on the outside of the first heat insulation 6 1.
a, 7b are laminated and an arbitrary number, for example, two second and third heat insulation layers 6 2 and 6 3 are laminated via a wire 8 and attached to the bolt 3 fixed to the outer surface 1a of the turbine casing on the outside thereof. consisting structure in which a final insulation layer 6 4 made of wire mesh 4 and finishing cement 9.
この様に従来の保温装置は第１の保温層６１に水練り保
温材５に依り構成しているので、次の様な欠点がある。Since such a conventional heat insulating device is configured depending on the water kneading heat insulating material 5 on the first insulation layer 61, it has the following such drawbacks.
(1)保温材の水練り作業に人手と時間を要し、且つその
保温材が粘土状である為、塗込み作業が面倒である。(1) The work of kneading the heat retaining material with water requires labor and time, and since the heat retaining material is clay-like, the coating operation is troublesome.
(2)水を使用する為、タービンケーシング外表面に錆が
発生しやすいばかりではなく、施行後にかなりの乾燥時
間を必要とするから据付期間が長くなる。(2) Since water is used, not only rust is likely to occur on the outer surface of the turbine casing, but also a considerable amount of drying time is required after the installation, which lengthens the installation period.
(3)運転開始後に水分は熱に依り蒸気となり熱膨張する
為、成形保温材にクラックを生じ運転中に保温層が崩壊
する恐れがある。(3) After the operation is started, moisture becomes vapor due to heat and thermally expands, so that the heat insulating material may crack and the heat insulating layer may collapse during the operation.
(4)上記水分に依り冷却されたタービンケーシングの被
保温面が運転開始後の蒸気に依り加熱される為、前記被
保温面に低サイクル熱疲労を生じてタービンケーシング
自体にクラックが発生する。(4) Since the heat-retained surface of the turbine casing that has been cooled by the water is heated by the steam after the start of operation, low-cycle thermal fatigue occurs on the heat-retained surface and cracks occur in the turbine casing itself.
又従来の保温装置は第１、第２保温層及び最終保温層が
タービンケーシングの外表面に一体積層される為、前記
(4)のクラック検査もしくは補修する場合、保温装置全
てを破壊完了後再施行する必要が有るので多大な時間、
労力及び資源を消費する欠点がある。Further, in the conventional heat retaining device, the first and second heat retaining layers and the final heat retaining layer are integrally laminated on the outer surface of the turbine casing.
When crack inspection or repair of (4), it is necessary to re-execute after all the heat insulation devices have been destroyed.
It has the disadvantage of consuming labor and resources.
本発明は上記鋳鋼製品のタービンケーシング及びバルブ
ケーシングの保温方法に於いて生ずる問題を解決し、迅
速に定期点検を行うことが出来、且つ、タービン定期艇
検時に要する費用及び期間を大巾に低減し、又保温材解
体時の粉じん、飛散をなくし、環境衛生の万全を計ると
共に産業廃棄物処理をなくす事を提供することにある。INDUSTRIAL APPLICABILITY The present invention solves the problem that occurs in the method for keeping the temperature of the turbine casing and the valve casing of the cast steel product, allows a quick periodic inspection, and significantly reduces the cost and period required for the turbine regular boat inspection. In addition, it is to eliminate dust and scattering at the time of disassembling the heat insulating material, to ensure environmental hygiene and to eliminate industrial waste treatment.
この発明は上記諸欠点を除去する事で、従来の様に第１
保温層に水練り保温材及びタービンケーシング外表面上
に一体にて積層する事を廃止し、複数枚の保温材を成形
した取外し再使用可能な、保温ブロックの保温装置を提
供するものである。そこで、本発明のタービンのケーシ
ングのケージ型保温装置は、曲率を有するケーシングの
被保温体の外表面に密着固定される複数の保温ブロック
を有し、保温ブロックは、高純度アルミナ質及び珪酸質
を原料とした繊維化された無機繊維ブランケットと高耐
熱性のフエル状ロックウール保温材との積層構造であっ
て、その表面に極細ガラス繊維からなる断熱用クロスを
有し、前記保温ブロック間を無機繊維防熱布団によりシ
ールしたことを特徴とする。The present invention eliminates the above-mentioned various drawbacks, and thus the first
The present invention provides a heat retaining device for a heat retaining block, which is capable of removing and reusing a plurality of heat retaining materials formed by abolishing that the heat retaining material is integrally laminated on the outer surface of the turbine casing in the heat retaining layer. Therefore, the cage type heat retention device for a casing of the turbine of the present invention has a plurality of heat retention blocks that are closely fixed to the outer surface of the body to be insulated having a curvature, and the heat retention block is made of high-purity alumina and silicate. It is a laminated structure of a fiberized inorganic fiber blanket and a high heat resistant fluted rock wool heat insulating material, having a heat insulating cloth made of ultrafine glass fibers on its surface, and between the heat insulating blocks. It is characterized in that it is sealed with an inorganic fiber heat insulating futon.
以下この発明の実施例を第４図〜第６図にて説明する。 An embodiment of the present invention will be described below with reference to FIGS.
第４図はタービンケーシング外表面１ａに複数個の保温
ブロック１０が最終的に取付けられた状態を示す。FIG. 4 shows a state in which a plurality of heat insulation blocks 10 are finally attached to the outer surface 1a of the turbine casing.
第５図は第４図を断面した形状で、保温ブロック１０の
ため、所要の機械的強度を与える為の補強枠体１１は適
当な寸法の型鋼及び帯鋼にて被保温体をスケッチ及び現
品合せの上、タービンケーシング外表面１ａに対面する
内側面をタービンケーシング１の曲率に密着固定出来る
曲面に組立てる。FIG. 5 is a cross-sectional shape of FIG. 4, and since the heat insulating block 10 is used, the reinforcing frame body 11 for giving a required mechanical strength is a sketch and an actual product of the heat insulating body made of die steel and band steel having appropriate dimensions. After matching, the inner surface facing the outer surface 1a of the turbine casing 1 is assembled into a curved surface that can be closely fixed to the curvature of the turbine casing 1.
これはタービンケーシング外表面１ａは全体が均一な温
度でなく、各々表面積が異なった区域に別れ、しかも軸
方向の表面温度が約３００〜５６６゜Cの広範囲に亘って
いるので、タービンケーシング１と保温ブロック１０と
の間にある程度以上の空間が存在した場合、熱対流が生
じ、この熱対流に依って高温域のタービンケーシング外
表面１ａに於いては冷却される事に依る熱応力が発生
し、タービンケーシング外表面１ａにクラックを生じさ
せる為タービンケーシング外表面１ａの曲率に充分追随
させる事が必要である。This is because the turbine casing outer surface 1a does not have a uniform temperature as a whole, is divided into areas having different surface areas, and the surface temperature in the axial direction covers a wide range of about 300 to 566 ° C. If there is a certain amount of space between the heat insulation block 10 and the heat insulation block 10, thermal convection occurs, and thermal stress is generated due to cooling on the turbine casing outer surface 1a in the high temperature region due to this thermal convection. In order to cause cracks on the outer surface 1a of the turbine casing, it is necessary to sufficiently follow the curvature of the outer surface 1a of the turbine casing.
保温ブロック１０の構成は、補強枠体１１の被体保温体
１ａに対応した面及び前記面と９０°の角度をなす、４
つの面にメタルラス１２を溶接し取付ける。The heat insulating block 10 has a configuration in which a surface of the reinforcing frame 11 corresponding to the body heat retaining body 1a and an angle of 90 ° with the surface are formed.
Weld metal lath 12 to one surface and attach.
次に高純度アルミナ質及び珪酸質の原料を繊維化した無
機繊維ブランケット１３を必要厚み積層しその上に耐熱
性の高いフエル状したロックウール保温材１４を必要厚
み積層する。Next, an inorganic fiber blanket 13 obtained by fibrating a high-purity alumina-based material and a silicic-acid-based material is laminated with a required thickness, and a felt-like rock wool heat insulating material 14 having high heat resistance is laminated with a required thickness.
保温ブロツク１０の外表面は外観を良くする為、受熱温
度に充分耐えられる、極細ガラス繊維を用いて製繊した
薄手の断熱用クロス１５を帯鋼１６で固定する。In order to improve the appearance of the outer surface of the heat insulating block 10, a thin heat insulating cloth 15 made of ultrafine glass fiber, which can sufficiently withstand the heat receiving temperature, is fixed with a strip steel 16.
保温ブロック１０と保温ブロック１０との間には無機繊
維防熱布団１７を熱の逸散を防止する為シール材として
使用し、各保温ブロックに溶接してあるジョイント１８
にてボルト１９及びナット２０で固着する構造である。An inorganic fiber heat insulation blanket 17 is used as a sealing material between the heat insulation blocks 10 to prevent heat from escaping, and a joint 18 welded to each heat insulation block is provided.
It is a structure in which the bolts 19 and the nuts 20 are fixed to each other.
本発明のケージ型保温装置は以上の如き構成であるか
ら、従来の保温装置の様にタービンケーシング１の分解
又は運転中任意の位置を点検検査する場合、その都度保
温装置を一部及び全体を破壊し補修する必要がなく容易
に保温ブロック１０を取外しタービンケーシング１の分
解、点検検査する事が出来る。Since the cage-type heat retaining device of the present invention has the above-described configuration, when disassembling the turbine casing 1 or inspecting and inspecting an arbitrary position during operation like the conventional heat retaining device, a part or the whole of the heat retaining device is required each time. There is no need to destroy and repair the heat insulation block 10, and the turbine casing 1 can be disassembled and inspected easily.
以上説明した様に、本発明は前述した従来技術の欠点で
ある。As explained above, the present invention is a drawback of the above-mentioned prior art.
(1)保温解体時の粉じん、飛散をなくし環境衛生に万全
を計れる。(1) It is possible to eliminate dust and scatter when dismantling the heat insulation and to ensure environmental hygiene.
(2)産業廃棄物処理をなくす。(2) Eliminate industrial waste treatment.
(3)誰にでも簡単に取付け、取外しが出来る。(3) Anyone can easily install and remove.
(4)保温施行時の工程を著しく短縮しコストの大巾な低
減を計れる。(4) Significant reduction in cost can be achieved by significantly shortening the process of heat retention.
(5)保温寿命が永久的になった事に依り資源を節約出来
る。(5) Resources can be saved due to permanent heat retention life.
等の効果がある。And so on.
第１図はタービンケーシングの全体図、第２図は第１図
のＡ−Ａ線断面図、第３図は第２図のＡ部詳細図、第４
図は本発明の一実施例のタービンケーシングに保温ブロ
ックを取付けた状態を示す外観図、第５図は第４図のＢ
−Ｂ線断面図、第６図は保温ブロックの斜視図である。 １…タービンケーシング、１ａ…タービンケーシング外
表面、２…ナット、３…固定ボルト、４…金網、５…水
練り保温材、１４…ロックウール保温材。1 is an overall view of the turbine casing, FIG. 2 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a detailed view of part A of FIG. 2, and FIG.
FIG. 5 is an external view showing a turbine casing according to an embodiment of the present invention with a heat insulation block attached, and FIG.
FIG. 6 is a perspective view of the heat retaining block, which is a sectional view taken along line -B. DESCRIPTION OF SYMBOLS 1 ... Turbine casing, 1a ... Turbine casing outer surface, 2 ... Nut, 3 ... Fixing bolt, 4 ... Wire mesh, 5 ... Water heat insulating material, 14 ... Rock wool heat insulating material.
Claims (1)
において、曲率を有するケーシングの被保温体の外表面
に密着固定される複数の保温ブロックを有し、該保温ブ
ロックは、高純度アルミナ質及び珪酸質を原料とした繊
維化された無機繊維ブランケットと高耐熱性のフエル状
ロックウール保温材との積層構造であって、その表面に
極細ガラス繊維からなる断熱用クロスを有し、前記保温
ブロック間を無機繊維防熱布団によりシールしたことを
特徴とするタービンのケーシングのケージ型保温装置。1. A cage type heat retaining device for a turbine casing, comprising a plurality of heat retaining blocks which are adhered and fixed to an outer surface of a body to be insulated having a curvature, the heat retaining blocks being made of high-purity alumina and silicic acid. A laminated structure of a fibrous inorganic fiber blanket made of a quality raw material and a high heat resistant fluted rock wool heat insulating material, having a heat insulating cloth made of ultrafine glass fibers on the surface thereof, and between the heat insulating blocks. A cage-type heat insulation device for a turbine casing, characterized in that the above is sealed with an inorganic fiber heat insulation futon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59036050A JPH061042B2 (en) | 1984-02-29 | 1984-02-29 | Cage type heat retaining device for turbine casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59036050A JPH061042B2 (en) | 1984-02-29 | 1984-02-29 | Cage type heat retaining device for turbine casing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60182306A JPS60182306A (en) | 1985-09-17 |
| JPH061042B2 true JPH061042B2 (en) | 1994-01-05 |
Family
ID=12458883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59036050A Expired - Lifetime JPH061042B2 (en) | 1984-02-29 | 1984-02-29 | Cage type heat retaining device for turbine casing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH061042B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5176495A (en) * | 1991-07-09 | 1993-01-05 | General Electric Company | Thermal shielding apparatus or radiositor for a gas turbine engine |
| US7785068B2 (en) * | 2007-05-17 | 2010-08-31 | General Electric Company | Steam turbine exhaust hood and method of fabricating the same |
| DE112018002412B4 (en) * | 2017-05-11 | 2023-12-07 | Mitsubishi Heavy Industries, Ltd. | Heat storage device for turbine casings, securing means for fastening a heat storage block for turbine casings and method for fastening a heat storage block for turbine casings |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS471990U (en) * | 1971-01-21 | 1972-08-22 | ||
| JPS5813045U (en) * | 1981-07-20 | 1983-01-27 | 三菱農機株式会社 | Sorting device in threshing machine |
| JPS5842303U (en) * | 1981-09-18 | 1983-03-22 | 株式会社日立製作所 | Turbine casing heat insulation device |
| JPS591984A (en) * | 1982-06-25 | 1984-01-07 | 電気化学工業株式会社 | Structure of furnace wall of industrial furnace |
-
1984
- 1984-02-29 JP JP59036050A patent/JPH061042B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60182306A (en) | 1985-09-17 |
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