JPS6045323B2 - Spray nozzle support method - Google Patents
Spray nozzle support methodInfo
- Publication number
- JPS6045323B2 JPS6045323B2 JP3303078A JP3303078A JPS6045323B2 JP S6045323 B2 JPS6045323 B2 JP S6045323B2 JP 3303078 A JP3303078 A JP 3303078A JP 3303078 A JP3303078 A JP 3303078A JP S6045323 B2 JPS6045323 B2 JP S6045323B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- spray nozzle
- diaphragm
- spray
- temperature fluid
- 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
Links
Landscapes
- Supports For Pipes And Cables (AREA)
Description
【発明の詳細な説明】
本発明は、火力発電所用ボイラ等に使用される減温器ス
プレーノズルの支持方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for supporting a desuperheater spray nozzle used in a boiler for a thermal power plant or the like.
添付図面は火力発電所用ボイラの過熱低減器として使用
されている減温器のスプレーノズル周辺の構造を示した
ものであつて、高温流体母管４を流れる高温流体Ａの温
度を低減させるため、低温流体Ｂがスプレーノズル１を
経て注入される。この場合、スプレーノズル１は高温流
体母管４および管台３を、前記高温流体Ａおよび低温流
体Ｂの温度差によつて生ずる熱衝撃から守り、かつ両流
体Ａ、Ｂの混合を均一に行うため、スプレーヘッド１ａ
が高温流体母管４の中央部に来るよう母管４中央部に向
つて伸ばしてある。ｌｂはスプレーヘッド１ａに設けた
低温流体Ｂの噴出口である。２は管台３とスプレーノズ
ル１の間に設けたダイヤフラムであつて、高温流体Ａと
スプレーヘッド１ａの間に生ずるカルマン渦、すなわち
、一定間隔を有する平行線上に複数個生ずる渦に起因す
るスプレーノズル１の振動を抑えるために設けてある。The attached drawing shows the structure around the spray nozzle of a desuperheater used as a desuperheater for a boiler for a thermal power plant. Cryogenic fluid B is injected via spray nozzle 1 . In this case, the spray nozzle 1 protects the high-temperature fluid main pipe 4 and nozzle 3 from thermal shock caused by the temperature difference between the high-temperature fluid A and the low-temperature fluid B, and uniformly mixes both fluids A and B. Therefore, spray head 1a
is extended toward the center of the high-temperature fluid main pipe 4 so that it is located at the center of the high-temperature fluid main pipe 4. lb is a spout port for the low temperature fluid B provided in the spray head 1a. Reference numeral 2 denotes a diaphragm installed between the nozzle 3 and the spray nozzle 1, which prevents the spray caused by the Karman vortices generated between the high-temperature fluid A and the spray head 1a, that is, by a plurality of vortices generated on parallel lines with a constant interval. This is provided to suppress vibration of the nozzle 1.
しかし、このようにスプレーノズル１を支持してもやは
り熱衝撃による損傷を受けることは避けられず、現在こ
の熱衝撃に耐え得る適当な材料が見当らないため、スプ
レーノズルを定期的に検査する必要がある。従つてスプ
レーノズル１の取外しを容易に行えるよう、ダイヤフラ
ム２と管台３は互いに接触支持されている。ここでダイ
ヤフラム２と管台３の接触支持の密着度を高くする必要
があり、これが低い場合にはスプレーノズル１の振動を
抑えることができず、ダイヤフラム２付近のスプレーノ
ズル１は大きな衝撃荷重を受けて破損に至る。現にこれ
まで、スプレーの苛酷な使用条件下では、ダイヤフラム
２の周辺部においてスプレーノズル１の破損が少なから
ず生じている。しかし、前記の密着度は管台３、ダイヤ
フラム２の接触部の機械加工精度を向上させることのみ
に頼つており、この方法では、ダイヤフラム２および管
台３の熱膨張率の差による離間の問題を解決することが
できなかつた。すなわち、現在、フこの接触部をＪＩＳ
表面粗さ区分で２５−Ｓ（Ｏ、０２５−）程度まで機械
加工することにより一定の密着度を保持しようとしてい
るが、減温器の使用状態にあつては管台３が高温状態、
スプレーノズル１が低温状態、ダイヤフラム２が中温状
態となり、５これらΞ者の熱膨張量に差が生ずるため接
触部２ａは離間してしまうのである。この離間量は、従
来方法のように管台３とダイヤフラム２が同一材料で作
られているか、またはほぼ同一の膨張率を有する材料か
ら構成した場合０．１３Ｗ１！Ｆｉ程度となり、機械加
工精度を高めても殆んど無意味であつた。本発明の目的
は上記した従来技術の欠点をなくし、スプレーノズル、
ダイヤフラムおよび管台の間の離間を防止し、もつてス
プレーノズルの振動による破壊を防止する、スプレーノ
ズルの支持方法を提供することにある。要するに本発明
は、減温機を構成する各部材、すなわちスプレーノズル
、ダイヤフラムおよび管台を含む高温流体母管の形成材
料を変え、各部材の熱膨張率を相違させ、管台とダイヤ
フラムの間に間隔が生じないようにしたものである。However, even if the spray nozzle 1 is supported in this way, it is still inevitable that it will be damaged by thermal shock, and as there is currently no suitable material that can withstand this thermal shock, it is necessary to periodically inspect the spray nozzle. There is. Therefore, the diaphragm 2 and the nozzle 3 are supported in contact with each other so that the spray nozzle 1 can be easily removed. Here, it is necessary to increase the degree of contact support between the diaphragm 2 and the nozzle 3. If this is low, the vibration of the spray nozzle 1 cannot be suppressed, and the spray nozzle 1 near the diaphragm 2 will receive a large impact load. This can lead to damage. In fact, under severe spray usage conditions, damage to the spray nozzle 1 has often occurred in the vicinity of the diaphragm 2. However, the degree of adhesion described above relies solely on improving the machining accuracy of the contact area between the nozzle head 3 and the diaphragm 2, and this method does not solve the problem of separation due to the difference in thermal expansion coefficient between the diaphragm 2 and the nozzle head 3. I couldn't solve it. In other words, currently the contact part of the flap is JIS
We are trying to maintain a certain degree of adhesion by machining to a surface roughness of about 25-S (O, 025-), but when the desuperheater is in use, the nozzle 3 is at a high temperature.
Since the spray nozzle 1 is in a low temperature state and the diaphragm 2 is in a medium temperature state, there is a difference in the amount of thermal expansion between these two members, so that the contact portions 2a are separated. This separation amount is 0.13W1 when the nozzle 3 and the diaphragm 2 are made of the same material as in the conventional method, or are made of materials with almost the same expansion coefficient! Fi was about the same level, and even if the machining accuracy was improved, it would be almost meaningless. The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to provide a spray nozzle,
It is an object of the present invention to provide a method for supporting a spray nozzle that prevents separation between a diaphragm and a nozzle and thereby prevents the spray nozzle from being destroyed by vibration. In short, the present invention changes the material forming the high-temperature fluid main tube including the spray nozzle, diaphragm, and nozzle head, and makes the coefficient of thermal expansion of each member different. This is so that there is no gap between the two.
次に本発明の実施例を図面を用いて説明する。Next, embodiments of the present invention will be described using the drawings.
先ず、管台３は高温流体Ａにより高温に加熱され最も熱
膨張が激しいため、膨張率の低い金属を用い、それに対
して、ダイヤフラム２は管台３より低温であるため、該
管台３よりも膨張率の高い金属、例えば管台３に合金鋼
（Ｃｒ−ＭＯ鋼等）を使用するならば、ダイヤフラム２
には、合金鋼より，高い膨張率を有するステンレス鋼等
を使用する。これにより、管台３とダイヤフラム２の離
間量は０．０７Ｔｆ０ｒｔ程度に抑えることができる。
さらに、ダイヤフラム２よりもより低温のスプレーノズ
ル１を、管台ダイヤフラムの金属材料よりもさらに膨張
率の高い金属にする組合せにするときにはダイヤフラム
２とスプレーノズル１の間に間隔が生ずることもない。
本発明によれば、ダイヤフラムと管台の間、さらには該
ダイヤフラムとスプレーノズルの間に間隙が生じないか
、もしくは生じてもごく僅かであるためスプレーノズル
が振動せず、従つて振動によるスプレーノズルの破壊を
防止することができ″る。First, the nozzle head 3 is heated to a high temperature by the high-temperature fluid A and undergoes the most intense thermal expansion, so a metal with a low expansion coefficient is used.On the other hand, the diaphragm 2 is lower temperature than the nozzle head 3, so it is made of a metal with a lower coefficient of expansion. If a metal with a high expansion rate is used, for example, alloy steel (Cr-MO steel, etc.) for the nozzle stub 3, the diaphragm 2
For this purpose, use stainless steel, etc., which has a higher expansion coefficient than alloy steel. Thereby, the amount of separation between the nozzle 3 and the diaphragm 2 can be suppressed to about 0.07Tf0rt.
Further, when the spray nozzle 1, which has a lower temperature than the diaphragm 2, is made of a metal whose expansion coefficient is higher than that of the metal material of the nozzle diaphragm, no gap is created between the diaphragm 2 and the spray nozzle 1.
According to the present invention, there is no gap between the diaphragm and the nozzle, and between the diaphragm and the spray nozzle, or the gap is very small, so the spray nozzle does not vibrate, and therefore the spray due to vibration does not occur. This can prevent the nozzle from breaking.
さらに、本方法は装置の構造に別段変更を加えないので
、装置の性能が低下することはなく、かつ安価に実施で
きる等種々の効果を発揮する。Furthermore, since this method does not require any particular changes to the structure of the device, the performance of the device does not deteriorate, and it exhibits various effects such as being able to be implemented at low cost.
添付図面は、本発明方法を実施する代表的な型式の減温
機であつて、現在火力発電所用ボイラの過熱低減器とし
て使用されているものの一部破断側面図である。
１１１●スプレーノズル、１ａＩＩＩ−スプレーヘッド
、１ｂ・・・・・・低温流体噴出口、２・・・・・・ダ
イヤフラム、２ａ・・・・・・ダイヤフラム接触面、３
・・・・・・管台、４・・・・・・高温流体母管、Ａ・
・・・・・高温流体、Ｂ・・・・・・低温流体。The accompanying drawing is a partially cutaway side view of a typical type of attemperator for carrying out the method of the present invention, which is currently used as a superheat attenuator for boilers for thermal power plants. 111●Spray nozzle, 1aIII-spray head, 1b... Low temperature fluid spout, 2... Diaphragm, 2a... Diaphragm contact surface, 3
...Nozzle head, 4...High temperature fluid main pipe, A.
...High temperature fluid, B...Low temperature fluid.
Claims (1)
スプレーノズルをそれぞれ膨張率の異る材料で形成し、
管台を最も膨張率の低い材料で、ダイヤフラムを次に膨
張率の低い材料で、さらにスプレーノズルを最も膨張率
の高い材料で成形することを特徴とするスプレーノズル
支持方法。1. The nozzle stand, diaphragm, and spray nozzle, which are the constituent members of the detemperature machine, are made of materials with different expansion coefficients,
A method for supporting a spray nozzle, characterized in that the nozzle head is made of a material with the lowest expansion coefficient, the diaphragm is made of a material with the next lowest expansion coefficient, and the spray nozzle is molded with a material with the highest expansion coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3303078A JPS6045323B2 (en) | 1978-03-24 | 1978-03-24 | Spray nozzle support method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3303078A JPS6045323B2 (en) | 1978-03-24 | 1978-03-24 | Spray nozzle support method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54125302A JPS54125302A (en) | 1979-09-28 |
| JPS6045323B2 true JPS6045323B2 (en) | 1985-10-08 |
Family
ID=12375384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3303078A Expired JPS6045323B2 (en) | 1978-03-24 | 1978-03-24 | Spray nozzle support method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6045323B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6078810U (en) * | 1983-11-08 | 1985-06-01 | 株式会社デサント | Vest for outdoor sports |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62284101A (en) * | 1986-05-31 | 1987-12-10 | 相浦 正廣 | Steam sterilizer |
| NL1003980C2 (en) * | 1996-09-06 | 1998-03-13 | Vialle Beheer B V | Injection device. |
-
1978
- 1978-03-24 JP JP3303078A patent/JPS6045323B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6078810U (en) * | 1983-11-08 | 1985-06-01 | 株式会社デサント | Vest for outdoor sports |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54125302A (en) | 1979-09-28 |
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