JP3046907B2 - Method for manufacturing scale adhesion preventing nozzle plate cooling water passage - Google Patents
Method for manufacturing scale adhesion preventing nozzle plate cooling water passageInfo
- Publication number
- JP3046907B2 JP3046907B2 JP6069334A JP6933494A JP3046907B2 JP 3046907 B2 JP3046907 B2 JP 3046907B2 JP 6069334 A JP6069334 A JP 6069334A JP 6933494 A JP6933494 A JP 6933494A JP 3046907 B2 JP3046907 B2 JP 3046907B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- nozzle plate
- nozzle
- water passage
- inner ring
- 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
- 239000000498 cooling water Substances 0.000 title claims description 115
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 238000000034 method Methods 0.000 title claims description 16
- 238000005266 casting Methods 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 18
- 238000005192 partition Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 10
- 238000003754 machining Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005242 forging Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- 239000012535 impurity Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は蒸気タービン、特に地熱
タービンの静翼又はノズル板におけるスケール付着防止
ノズル板の冷却水通路製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a cooling water passage for a nozzle plate for preventing scale adhesion in a stationary blade or a nozzle plate of a steam turbine, particularly a geothermal turbine.
【０００２】[0002]
【従来の技術】地熱タービン等では蒸気中に含まれる不
純物が多く含まれており、第１段ノズル板または静翼に
スケールとして析出・付着し、蒸気通路を閉塞する等の
問題が生じている。2. Description of the Related Art In a geothermal turbine or the like, a large amount of impurities contained in steam is contained, and it is deposited and adhered as scale to a first stage nozzle plate or a stationary blade, thereby causing a problem that a steam passage is blocked. .
【０００３】この問題を解決する方法として、ノズル板
又は静翼のプロファイル部に冷却水を通し、翼のメタル
温度を下げることが有効であることはわかっていたが、
このような冷却水通路を有する翼の製造方法は確立して
いなかった。[0003] As a method of solving this problem, it has been found that it is effective to lower the metal temperature of the blade by passing cooling water through the nozzle plate or the profile portion of the stationary blade.
A method for manufacturing a blade having such a cooling water passage has not been established.
【０００４】[0004]
【発明が解決しようとする課題】従来、ノズル板又は静
翼は棒材から削出した後、外輪、内輪を鋳造する際に同
時にプロファイル両端部を外，内輪間に鋳込むことによ
り両円周上に固定する方法で製作されていたが、この方
法をそのまま冷却水通路を有するノズル又は静翼に適用
するには次のような問題があった。 （１）捩り翼のような複雑な形状のプロファイル部に機
械加工により冷却水通路を設けるのが困難である。 （２）冷却水通路を有するプロファイル部に外輪または
内輪を通して冷却水を供給する必要があるが、その為の
通路を確保する技術が確立していないこと。 （３）上記（２）の通路を設ける際、冷却水通路を有す
るプロファイル部に、管を取付けてから、外輪、および
内輪と一緒に鋳込む方法が考えられたが、鋳込時に管も
溶損してしまうおそれがあり、この対策が必要であるこ
と。Conventionally, a nozzle plate or a stationary blade is cut from a rod material, and then, when casting an outer ring and an inner ring, both ends of the profile are simultaneously cast between the outer and inner rings by casting both ends. Although it was manufactured by a method of fixing the nozzle on the nozzle, the following problem arises when this method is directly applied to a nozzle or a stationary blade having a cooling water passage. (1) It is difficult to provide a cooling water passage by machining in a profile portion having a complicated shape such as a twisted blade. (2) It is necessary to supply cooling water to the profile portion having the cooling water passage through the outer ring or the inner ring, but a technique for securing a passage for the cooling water has not been established. (3) When providing the passage of the above (2), a method was considered in which a pipe was attached to a profile portion having a cooling water passage, and then cast together with the outer ring and the inner ring. There is a risk of damage, and this measure is necessary.
【０００５】本発明はこれらの課題に対してスケール生
成量の多いノズル板に冷却水通路を設け、内輪、外輪を
通して連続的に冷却水を供給し、スケール付着を防止す
るためのノズル板冷却水通路の製造方法を提供すること
を目的としている。[0005] In order to solve the above-mentioned problems, the present invention provides a cooling water passage in a nozzle plate that generates a large amount of scale, and continuously supplies cooling water through an inner ring and an outer ring to prevent nozzle plate cooling water from adhering to the scale. It is an object to provide a method of manufacturing a passage.
【０００６】[0006]
【課題を解決するための手段】そのため、本発明は、
（１）ノズル板を、円環状に必要な枚数だけ所定の角度
に並べ、内輪と外輪に鋳込んで一体化される仕切板にお
けるノズルの冷却水通路の製造方法として、ノズルをブ
ロック構成とし、各ブロックにおいて冷却水通路を冷却
水接続管で接続して連通せしめ、冷却水供給管から冷却
水を流し、冷却水排水管へ戻すような構成とし、仕切板
における全ノズル板内に冷却水通路を確保し、且つ、そ
の接続をシール溶接等、によって行なう手段をとる。
又、（１）の発明における冷却水接続管を金属製のカバ
ーで覆い、内輪及び外輪と共に鋳込むような手段も提供
する。Accordingly, the present invention provides
(1) A nozzle plate is arranged in a block shape as a method of manufacturing a cooling water passage of a nozzle in a partition plate which is arranged by casting a required number of nozzle plates in an annular shape and cast into an inner ring and an outer ring and integrated. In each block, the cooling water passages are connected by a cooling water connection pipe so as to communicate with each other, the cooling water flows from the cooling water supply pipe and returns to the cooling water drain pipe, and the cooling water passages are formed in all the nozzle plates in the partition plate. And securing the connection by seal welding or the like.
Also provided is a means for covering the cooling water connection pipe in the invention of (1) with a metal cover and casting it together with the inner ring and the outer ring.
【０００７】即ち、本発明は、（１）機械加工や鋳造ま
たは鍛造によって製作されたノズル板を、内輪と外輪の
間で円環状に必要な枚数だけ所定の角度に並べ、前記内
輪と外輪の間に鋳込んで一体化されてなる仕切板におけ
るノズル板の冷却水通路の製造方法であって、前記ノズ
ル板はプロファイル内部に貫通した冷却水通路を持ち、
同ノズル板を複数のブロックを構成する配置とし、各ブ
ロックの最初のノズル板の内，外周側の一方の冷却水通
路開口部は冷却水供給管へ、同ブロックの最終のノズル
板の内，外周側の一方の冷却水通路開口部は冷却水排水
管へそれぞれ冷却水接続管を介して接続され、同ブロッ
クのその他の隣り合うノズル板の内周側同志及び外周側
同志の冷却水通路開口部はそれぞれ冷却水接続管で接続
して前記仕切板における全ノズル板内に冷却水通路を連
通し、且つ、その接続を溶接によって行なうことを特徴
とするスケール付着防止ノズル板冷却水通路製造方法を
提供する。That is, the present invention provides: (1) A required number of nozzle plates formed by machining, casting or forging are arranged annularly at a predetermined angle between an inner ring and an outer ring, and the nozzle plates of the inner ring and the outer ring are arranged. A method of manufacturing a cooling water passage of a nozzle plate in a partition plate that is cast and integrated between the nozzle plate, wherein the nozzle plate has a cooling water passage penetrating inside a profile,
The nozzle plate is arranged to form a plurality of blocks, and one of the first nozzle plates of each block and one of the cooling water passage openings on the outer peripheral side is connected to a cooling water supply pipe, and the last nozzle plate of the block is One cooling water passage opening on the outer peripheral side is connected to a cooling water drain pipe via a cooling water connection pipe, and the cooling water passage openings on the inner peripheral side and the outer peripheral side of other adjacent nozzle plates of the block are connected. The parts are connected by cooling water connecting pipes to communicate cooling water passages in all the nozzle plates in the partition plate, and the connection is performed by welding, wherein the scale adhesion preventing nozzle plate cooling water passage manufacturing method is provided. I will provide a.
【０００８】又、（２）前述の（１）の発明において、
前記複数のノズル板と接続する冷却水接続管はそれぞれ
金属製のカバーを被せ固定の上、前記各ノズル板を内輪
及び外輪の円周上にセットして仕切板の蒸気通路を確保
の上、前記冷却水接続管の金属製カバーと共に前記内輪
及び外輪に鋳込んで仕切板と一体化して、前記冷却水接
続管が前記内輪及び外輪鋳込時に溶湯によって溶損する
のを防止することを特徴とするスケール付着防止ノズル
板冷却水通路製造方法も提供する。(2) In the above-mentioned invention (1),
The cooling water connection pipes connected to the plurality of nozzle plates are each covered with a metal cover and fixed, and the respective nozzle plates are set on the circumference of the inner ring and the outer ring to secure the steam passage of the partition plate. The cooling water connection pipe is cast into the inner ring and the outer ring together with a metal cover of the cooling water connection pipe and integrated with a partition plate to prevent the cooling water connection pipe from being melted by the molten metal at the time of casting the inner ring and the outer ring. The present invention also provides a method for manufacturing a cooling water passage for a nozzle plate for preventing scale adhesion.
【０００９】[0009]
【作用】本発明は前述のような手段により、各ノズル板
には冷却水通路が連通するので、（１）ノズル板に冷却
水供給管より連続もしくは間歇的に冷却水を通水し、冷
却水排水管へ流すことが可能となり、地熱蒸気のように
スケールが付着し易い場合でも、プロファイル部分の表
面が水濡れ状となるためスケール付着を防止することが
出来る。又、ノズル冷却水通路開口部と冷却水接続管の
接合をシール溶接又はこれに近い接合とすることによっ
て、複数のノズル板及びこれを結ぶ複数の冷却水接続管
ピースの結合・保持がしっかりしたものとなるので内輪
及び外輪に鋳込む際、精度良くセット出来る。又、ノズ
ル板に通水時、冷却水がタービン内部に漏洩するのを防
止出来る効果もある。According to the present invention, the cooling water passage communicates with each nozzle plate by the means as described above. (1) Cooling water is continuously or intermittently supplied from the cooling water supply pipe to the nozzle plate to cool the nozzle plate. It is possible to flow the water to the water drain pipe, and even when the scale easily adheres like geothermal steam, the surface of the profile portion becomes wet and the scale can be prevented from adhering. In addition, the joint between the nozzle cooling water passage opening and the cooling water connecting pipe is made by seal welding or a similar joint, so that the plurality of nozzle plates and the plurality of cooling water connecting pipe pieces connecting them are firmly connected and held. It can be set with high accuracy when casting into the inner and outer rings. Also, there is an effect that it is possible to prevent the cooling water from leaking into the inside of the turbine when water is passed through the nozzle plate.
【００１０】更に、（２）内輪及び外輪の鋳込に際し
て、ノズル板ブロックの鋳込部分にある冷却水接続管に
金属製カバーを被せることで、湯温によって冷却水接続
管が溶損するのを防止することが出来る。(2) When casting the inner ring and the outer ring, a metal cover is placed on the cooling water connection pipe in the casting portion of the nozzle plate block to prevent the cooling water connection pipe from being melted by the hot water temperature. Can be prevented.
【００１１】[0011]
【実施例】以下、本発明の実施例について、図面に基づ
いて具体的に説明する。図１は本発明の一実施例に係る
スケール付着防止ノズル板冷却水通路製造方法を適用し
た第１段ノズルの冷却水管取付、製作の状態を示す斜視
図、図２はその第１段ノズル板１と冷却水管２の全体組
立図（１／４部分）であり、内輪及び外輪５に鋳込んで
一体化される仕切板におけるノズル板冷却水通路の製造
方法として、ノズル板１を、円環状に必要な枚数だけ所
定の角度に並べて配置する。ノズル板１はプロファイル
内部に貫通した冷却水通路１ａをもち、ノズル板１を複
数個並べて全体を数個のブロックを構成させることと
し、ブロックの始まりのノズル板１の内，外周側の一方
の冷却水通路開口部は冷却水供給管６と、ブロックの終
りのノズル板１の内，外周側の一方の冷却水通路開口部
は冷却水排水管７とそれぞれ冷却水接続管２を介して接
続する。その他の隣り合うノズル板１の内周側または外
周側の冷却水通路開口部をそれぞれ冷却水接続管２で接
続してブロックの冷却水通路を構成する。このようにす
べてのブロックの仕切板における全ノズル板１内に冷却
水通路を確保し、且つ、その接続をシール溶接等によっ
て行なってノズル板ブロックとする構成としている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a perspective view showing a state of mounting and manufacturing a cooling water pipe of a first stage nozzle to which a method for manufacturing a scale adhesion preventing nozzle plate cooling water passage according to an embodiment of the present invention is applied, and FIG. 1 is an overall assembly view (1/4 part) of a cooling water pipe 1 and a cooling water pipe 2. As a method for manufacturing a nozzle plate cooling water passage in a partition plate that is cast into and integrated with an inner ring and an outer ring 5, a nozzle plate 1 is formed in an annular shape. Are arranged at a predetermined angle as required. The nozzle plate 1 has a cooling water passage 1a penetrating inside the profile, and a plurality of nozzle plates 1 are arranged to form several blocks as a whole. The cooling water passage opening is connected to the cooling water supply pipe 6, and one of the cooling water passage openings on the outer peripheral side of the nozzle plate 1 at the end of the block is connected to the cooling water drain pipe 7 via the cooling water connection pipe 2. I do. The cooling water passage openings on the inner peripheral side or the outer peripheral side of the other adjacent nozzle plates 1 are respectively connected by cooling water connection pipes 2 to form a cooling water passage of the block. As described above, the cooling water passages are secured in all the nozzle plates 1 of the partition plates of all the blocks, and the connection is performed by seal welding or the like to form a nozzle plate block.
【００１２】図３は図２におけるＡ−Ａ矢視図で、内輪
４と外輪５との間にノズル板１が取付けられ、冷却水通
路１ａが冷却水接続管２で接続されている状態を示して
いる。なお、３は後述する金属製カバーで冷却水接続管
２を覆っているものである。FIG. 3 is a view taken in the direction of arrows A--A in FIG. 2, showing a state in which the nozzle plate 1 is mounted between the inner ring 4 and the outer ring 5, and the cooling water passage 1a is connected by a cooling water connecting pipe 2. Is shown. Reference numeral 3 denotes a cooling water connection pipe 2 covered by a metal cover described later.
【００１３】図４は図２におけるＣ−Ｃ矢視図で、ノズ
ル板１の配置と冷却水接続管２の状態を示している。FIG. 4 is a view taken in the direction of arrows CC in FIG. 2 and shows the arrangement of the nozzle plate 1 and the state of the cooling water connection pipe 2.
【００１４】図５は図２におけるＡ−Ａ矢視図でのノズ
ル板１、冷却水接続管２、金属製カバー３の内輪３及び
外輪５鋳込前の溶接組立の状態を示している。（Ｗ１，
Ｗ２の部分を溶接する。）図６は図２におけるＤ−Ｄ矢
視図で、ノズル板１、冷却水排水管７へ接続する冷却水
接続管２、金属製カバー３の内輪及び外輪５鋳込前の溶
接組立の状態を示している。（Ｗ３，Ｗ４の部分を溶接
する。）図３，図５，図６に示すようにシール溶接等に
よってノズル板１の冷却水通路開口部に接続された冷却
水接続管２が内輪４及び外輪５鋳込時に湯によって溶損
するのを防止するため、冷却水接続管２に金属製のカバ
ー３を被せ固定の上、各ノズル板ブロックを円周上にセ
ットし、仕切板の蒸気通路を確保の上、ノズル板１の
内，外周側と冷却水管２の金属製カバー３部とともに内
輪４及び外輪５に鋳込んで仕切板を一体化して、各ノズ
ル板ブロックの冷却水接続管２を冷却水供給管６及び冷
却水排水管７に接続し、それぞれの母管に接続する。FIG. 5 shows the nozzle plate 1, the cooling water connection pipe 2, the inner ring 3 and the outer ring 5 of the metal cover 3 in a welded state before casting, as viewed in the direction of arrows AA in FIG. (W1,
Weld the part of W2. FIG. 6 is a view taken in the direction of arrows DD in FIG. 2, and shows a state of welding assembly before casting the nozzle plate 1, the cooling water connection pipe 2 connected to the cooling water drain pipe 7, the inner ring and the outer ring 5 of the metal cover 3. Is shown. (Welds W3 and W4 are welded.) As shown in FIGS. 3, 5, and 6, the cooling water connecting pipe 2 connected to the opening of the cooling water passage of the nozzle plate 1 by seal welding or the like is connected to the inner ring 4 and the outer ring. 5 In order to prevent melting due to hot water during casting, cover the cooling water connection pipe 2 with a metal cover 3 and fix it, and then set each nozzle plate block on the circumference to secure the steam passage of the partition plate. Of the nozzle plate 1 and the outer peripheral side of the nozzle plate 1 and the metal cover 3 of the cooling water pipe 2 are cast into the inner ring 4 and the outer ring 5 to integrate the partition plate to cool the cooling water connection pipe 2 of each nozzle plate block. It connects to the water supply pipe 6 and the cooling water drain pipe 7, and connects to each mother pipe.
【００１５】図１は内輪４と外輪５に挟まれ、鋳込まれ
るノズル板１の２枚からなるブロックを示し、冷却水接
続管２が冷却水通路１ａに接続され、金属製カバー３で
挟まれて固定される状態を示している。FIG. 1 shows a block composed of two nozzle plates 1 to be cast and sandwiched between an inner race 4 and an outer race 5. A cooling water connection pipe 2 is connected to a cooling water passage 1 a and sandwiched by a metal cover 3. And fixed.
【００１６】以上の諸構成において、ノズル板１に冷却
水供給管６より連続もしくは間歇的に冷却水を通水し、
冷却水排水管７へ通水することが可能となり、地熱蒸気
のようにスケールが付着し易い場合でも、約２０℃の冷
却水通水中はノズル板１のプロファイル部分の表面が水
濡れ状となるため、１５０℃前後の蒸気中の成分による
スケール付着を防止することが出来る。In the above arrangements, cooling water is continuously or intermittently passed through the nozzle plate 1 from the cooling water supply pipe 6,
The water can be passed through the cooling water drain pipe 7, and even when scale easily adheres like geothermal steam, the surface of the profile portion of the nozzle plate 1 becomes wet when the cooling water flows at about 20 ° C. Therefore, it is possible to prevent adhesion of scale due to components in steam at about 150 ° C.
【００１７】また、製造時点でノズル板１の冷却水通路
開口部と冷却水接続管２の接合をシール溶接又はこれに
近い接合とすることによって、複数のノズル板１及びこ
れを複数の冷却水接続管２ピースの結合・保持がしっか
りしたものとなるので内輪４及び外輪５に鋳込む際、精
度良くセット出来る。又、ノズル板１に通水時、冷却水
がタービン内部に漏洩するのを防止出来る効果もある。Further, at the time of manufacturing, the joint between the cooling water passage opening of the nozzle plate 1 and the cooling water connection pipe 2 is formed by seal welding or a joint similar thereto, so that the plurality of nozzle plates 1 and the plurality of cooling water Since the connection and holding of the two pieces of the connection pipe become firm, it can be set with high accuracy when cast into the inner ring 4 and the outer ring 5. In addition, there is also an effect that it is possible to prevent the cooling water from leaking into the turbine when the water flows through the nozzle plate 1.
【００１８】更に、内輪４及び外輪５の鋳込に際して、
ノズル板ブロックの鋳込部分にある冷却水接続管２に金
属製カバー３を被せることで、湯温によって冷却水管２
が溶損するのを防止することが出来る。Further, when casting the inner ring 4 and the outer ring 5,
The cooling water connection pipe 2 in the casting part of the nozzle plate block is covered with the metal cover 3 so that the cooling water pipe 2
Can be prevented from being melted.
【００１９】[0019]
【発明の効果】以上具体的に述べたように、本発明によ
れば次の様な効果が期待される。即ち、本発明のスケー
ル付着防止ノズル板冷却水通路製造方法を採用すること
によって、地熱発電等のスケール生成量の多いタービン
の第１段ノズル板を冷却水で連続的もしくは間歇的に冷
却することが可能となり、スケールの付着を防止するこ
とが出来るので、スケール付着に伴うタービンの効率低
下、出力減を避け得る効果を生ずる。As described above, according to the present invention, the following effects are expected. That is, the first stage nozzle plate of a turbine with a large amount of scale generation, such as geothermal power generation, is continuously or intermittently cooled with cooling water by employing the method for manufacturing a scale adhesion preventing nozzle plate cooling water passage of the present invention. This makes it possible to prevent the adhesion of scale, so that the effect of avoiding a decrease in turbine efficiency and a decrease in output due to the adhesion of scale is produced.
【００２０】又、製造方法としても、ノズル板冷却水通
路開口部と冷却水接続管の接合をシール溶接、等とし複
数個のノズル板を纏めるブロック化を実施し、更に金属
製カバーを用いることで、鋳込の際の湯温によって冷却
水接続管が溶損するのを防止するとともにデリケートな
鋳込のセットを行ない易くする効果がある。In the manufacturing method, the nozzle plate cooling water passage opening and the cooling water connection pipe are joined by seal welding, etc., and a block is formed by integrating a plurality of nozzle plates, and a metal cover is used. Thus, there is an effect that the cooling water connection pipe is prevented from being melted and damaged by the hot water temperature at the time of casting, and that delicate casting is easily set.
【図１】本発明の一実施例に係るスケール付着防止ノズ
ル板冷却水通路製造方法を適用した第１段ノズルの冷却
水接続管取付の状態を示す斜視図である。FIG. 1 is a perspective view showing a state in which a cooling water connection pipe is attached to a first stage nozzle to which a method of manufacturing a scale adhesion preventing nozzle plate cooling water passage according to an embodiment of the present invention is applied.
【図２】本発明の一実施例に係るスケール付着防止ノズ
ル板冷却水通路製造方法を適用した第１段ノズルの冷却
水管全体の組立図の１部である。FIG. 2 is a part of an assembly drawing of the entire cooling water pipe of the first stage nozzle to which the method for manufacturing a scale adhesion preventing nozzle plate cooling water passage according to one embodiment of the present invention is applied.
【図３】図２におけるＡ−Ａ矢視図である。FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 2;
【図４】図２のＣ−Ｃ矢視図である。FIG. 4 is a view taken in the direction of arrows CC in FIG. 2;
【図５】図２のＡ−Ａ矢視図で、ノズル板、冷却水接続
管、等の外輪及び内輪鋳込前の溶接組立状態を示してい
る。5 is a view taken in the direction of arrows AA in FIG. 2 and shows a welding assembly state before casting of an outer ring and an inner ring of a nozzle plate, a cooling water connection pipe, and the like.
【図６】図２におけるＤ−Ｄ矢視図である。FIG. 6 is a view as seen from the direction of arrows DD in FIG. 2;
１ ノズル板 ２ 冷却水接続管 ３ 金属製カバー ４ 内輪 ５ 外輪 ６ 冷却水供給管 ７ 冷却水排水管 DESCRIPTION OF SYMBOLS 1 Nozzle plate 2 Cooling water connection pipe 3 Metal cover 4 Inner ring 5 Outer ring 6 Cooling water supply pipe 7 Cooling water drain pipe
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−116805（ＪＰ，Ａ) 実開 平４−119303（ＪＰ，Ｕ) 実開 昭61−70502（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F01D 9/00 F03G 4/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-116805 (JP, A) JP-A 4-119303 (JP, U) JP-A-61-70502 (JP, U) (58) Investigation Field (Int.Cl. 7 , DB name) F01D 9/00 F03G 4/00
Claims (2)
されたノズル板を、内輪と外輪の間で円環状に必要な枚
数だけ所定の角度に並べ、前記内輪と外輪の間に鋳込ん
で一体化されてなる仕切板におけるノズル板の冷却水通
路の製造方法であって、前記ノズル板はプロファイル内
部に貫通した冷却水通路を持ち、同ノズル板を複数のブ
ロックを構成する配置とし、各ブロックの最初のノズル
板の内，外周側の一方の冷却水通路開口部は冷却水供給
管へ、同ブロックの最終のノズル板の内，外周側の一方
の冷却水通路開口部は冷却水排水管へそれぞれ冷却水接
続管を介して接続され、同ブロックのその他の隣り合う
ノズル板の内周側同志及び外周側同志の冷却水通路開口
部はそれぞれ冷却水接続管で接続して前記仕切板におけ
る全ノズル板内に冷却水通路を連通し、且つ、その接続
を溶接によって行なうことを特徴とするスケール付着防
止ノズル板冷却水通路製造方法。1. A nozzle plate manufactured by machining, casting or forging is arranged at a predetermined angle in a required number of rings between an inner ring and an outer ring, and is cast and integrated between the inner ring and the outer ring. A method for manufacturing a cooling water passage of a nozzle plate in a partition plate, wherein the nozzle plate has a cooling water passage penetrating inside a profile, and the nozzle plate is arranged to constitute a plurality of blocks, One of the cooling water passage openings on the outer peripheral side of the first nozzle plate is to the cooling water supply pipe, and one of the cooling water passage openings on the outer peripheral side of the last nozzle plate of the block is to the cooling water drain pipe. The cooling water connection pipes are connected via cooling water connection pipes, and the cooling water passage openings on the inner circumference side and the outer circumference side of other adjacent nozzle plates of the same block are connected by cooling water connection pipes, respectively, and all of the partition plates are connected. Cool inside the nozzle plate A method for manufacturing a nozzle water cooling passage for preventing nozzle adhesion to a scale, wherein the cooling water passage is communicated with the water passage and the connection is made by welding.
続管はそれぞれ金属製のカバーを被せ固定の上、前記各
ノズル板を内輪及び外輪の円周上にセットして仕切板の
蒸気通路を確保の上、前記冷却水接続管の金属製カバー
と共に前記内輪及び外輪に鋳込んで仕切板と一体化し
て、前記冷却水接続管が前記内輪及び外輪鋳込時に溶湯
によって溶損するのを防止することを特徴とする請求項
１記載のスケール付着防止ノズル板冷却水通路製造方
法。2. The cooling water connection pipes connected to the plurality of nozzle plates are each covered with a metal cover and fixed, and the respective nozzle plates are set on the circumference of an inner ring and an outer ring to form a steam passage of a partition plate. After securing the cooling water connection pipe, the metal cover of the cooling water connection pipe is cast into the inner ring and the outer ring and integrated with the partition plate to prevent the cooling water connection pipe from being melted by the molten metal at the time of casting the inner ring and the outer ring. 2. The method for manufacturing a cooling water passage for a nozzle plate for preventing adhesion of scale according to claim 1, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6069334A JP3046907B2 (en) | 1994-04-07 | 1994-04-07 | Method for manufacturing scale adhesion preventing nozzle plate cooling water passage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6069334A JP3046907B2 (en) | 1994-04-07 | 1994-04-07 | Method for manufacturing scale adhesion preventing nozzle plate cooling water passage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07279610A JPH07279610A (en) | 1995-10-27 |
| JP3046907B2 true JP3046907B2 (en) | 2000-05-29 |
Family
ID=13399557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6069334A Expired - Lifetime JP3046907B2 (en) | 1994-04-07 | 1994-04-07 | Method for manufacturing scale adhesion preventing nozzle plate cooling water passage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3046907B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10935007B2 (en) | 2017-02-10 | 2021-03-02 | Mitsubishi Power, Ltd. | Geothermal turbine |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100836450B1 (en) * | 2007-05-09 | 2008-06-09 | 웅진코웨이주식회사 | How to prevent scale deposition of steam generator |
| JP6049565B2 (en) * | 2013-07-31 | 2016-12-21 | 三菱日立パワーシステムズ株式会社 | Geothermal turbine |
| JP6257946B2 (en) * | 2013-07-31 | 2018-01-10 | 三菱日立パワーシステムズ株式会社 | Geothermal turbine |
| JP7399043B2 (en) * | 2020-07-16 | 2023-12-15 | 三菱重工業株式会社 | geothermal turbine |
-
1994
- 1994-04-07 JP JP6069334A patent/JP3046907B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10935007B2 (en) | 2017-02-10 | 2021-03-02 | Mitsubishi Power, Ltd. | Geothermal turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07279610A (en) | 1995-10-27 |
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