JPH0748961Y2 - Turbine plant - Google Patents
Turbine plantInfo
- Publication number
- JPH0748961Y2 JPH0748961Y2 JP8904888U JP8904888U JPH0748961Y2 JP H0748961 Y2 JPH0748961 Y2 JP H0748961Y2 JP 8904888 U JP8904888 U JP 8904888U JP 8904888 U JP8904888 U JP 8904888U JP H0748961 Y2 JPH0748961 Y2 JP H0748961Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- turbine
- steam
- pressure
- pressure turbine
- 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
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Control Of Turbines (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案は、タービンプラント、殊に高圧タービン及び低
圧タービンを備えている原子力タービンプラントに関す
る。FIELD OF THE INVENTION The present invention relates to turbine plants, in particular nuclear turbine plants comprising high pressure turbines and low pressure turbines.
従来の技術 原子力タービンプラントにおいては、原子力蒸気発生器
からの主蒸気圧力が一般に60ata程度あることから、復
水器の真空まで約60kg/cm2の差圧（熱落差）を１台のタ
ービンで処理することができない。BACKGROUND ART In a nuclear turbine plant, the main steam pressure from a nuclear steam generator is generally about 60 ata, so a differential pressure (heat drop) of about 60 kg / cm 2 up to the vacuum of a condenser is generated by one turbine. Can not be processed in.
そこで、第２図に一例を示すように、高圧タービン１と
低圧タービン２とを組合せ、高圧タービン１では60ata
から10ata位までまた低圧タービン２では10ataから復水
器３の真空まで、２段階に分けて仕事をさせ、発電機４
を駆動している。Therefore, as shown in FIG. 2 as an example, the high-pressure turbine 1 and the low-pressure turbine 2 are combined, and the high-pressure turbine 1 has 60 ata.
From 10 ata to about 10 ata, and from low pressure turbine 2 to 10 ata to vacuum of condenser 3 to work in two stages, generator 4
Are driving.
また、熱サイクルの効率を向上させるために高圧タービ
ン１と低圧タービン２との間の蒸気管路５の途中に湿分
分離加熱器６を設け、蒸気中の湿分除去及び再熱を行っ
ている。Further, in order to improve the efficiency of the heat cycle, a moisture separation heater 6 is provided in the middle of the steam pipe 5 between the high pressure turbine 1 and the low pressure turbine 2 to remove moisture in steam and reheat it. There is.
更に、タービンは負荷が急激に遮断された場合に回転数
が大きく上昇すると非常に危険なため、高圧タービン１
の入口側に主蒸気止め弁７とともに蒸気加減弁８を設
け、この蒸気加減弁８を急閉することによってタービン
の回転数の過大な上昇を防止するようにしている。Further, the turbine is extremely dangerous when the rotation speed greatly increases when the load is suddenly cut off.
A steam control valve 8 is provided together with the main steam stop valve 7 on the inlet side of the valve, and the steam control valve 8 is rapidly closed to prevent an excessive increase in the rotational speed of the turbine.
そして、原子力タービンの場合には、前述した湿分分離
加熱器６の容積及び蒸気管路５の配管容積が大きいため
に、蒸気加減弁８を急閉しただけでは、低圧タービン２
の過速を防止できず、そのため低圧タービン２の入口側
に再熱蒸気止め弁９とともにインターセプト弁10を設
け、このインターセプト弁10も急閉するようにしてい
る。In the case of a nuclear power turbine, since the volume of the moisture separation heater 6 and the piping volume of the steam pipeline 5 are large, the low pressure turbine 2 cannot be simply closed by rapidly closing the steam control valve 8.
Therefore, the intercept valve 10 is provided together with the reheat steam stop valve 9 on the inlet side of the low-pressure turbine 2, and the intercept valve 10 is also closed rapidly.
しかして、これらの蒸気加減弁８及びインターセプト弁
10はその開閉順序にインターロックがあり、閉じの場合
には蒸気加減弁８が先に閉じ、その後にインターセプト
弁10が閉じ、また開きの場合にはインターセプト弁10が
先に開き、その後に蒸気加減弁８が開くようになってい
る。Therefore, these steam control valve 8 and intercept valve
10 has an interlock in the opening and closing order, and when closed, the steam control valve 8 is closed first, then the intercept valve 10 is closed, and when it is open, the intercept valve 10 is opened first, and then steam is opened. The adjusting valve 8 is designed to open.
そして、これらの蒸気加減弁８及びインターセプト弁10
の開閉順序が万一誤動作により逆になった場合には、蒸
気加減弁８の上流側の主蒸気圧力が異常に上昇し、場合
によっては設計圧力を超す危険もある。And these steam control valve 8 and intercept valve 10
Should the order of opening and closing be reversed due to an erroneous operation, the main steam pressure on the upstream side of the steam control valve 8 will rise abnormally, and in some cases there is a risk of exceeding the design pressure.
このため、従来は、蒸気管路５における再熱蒸気止め弁
９の上流位置に逃し弁11を設け、この逃し弁11により負
荷急減時における異常昇圧を防止して、タービンを保護
するようにしている。For this reason, conventionally, a relief valve 11 is provided at a position upstream of the reheat steam stop valve 9 in the steam pipeline 5, and the relief valve 11 prevents abnormal pressurization at the time of sudden load reduction to protect the turbine. There is.
なお、一般に、主蒸気止め弁７及び蒸気加減弁８は互い
に近接して設けられて第１の弁装置12を構成し、また再
熱蒸気止め弁９及びインターセプト弁10を互いに近接し
て設けられて第２の弁装置13を構成している。In addition, generally, the main steam stop valve 7 and the steam control valve 8 are provided close to each other to form a first valve device 12, and the reheat steam stop valve 9 and the intercept valve 10 are provided close to each other. And constitutes the second valve device 13.
考案が解決しようとする課題 このように、従来は、負荷急減時における異常昇圧を防
止してタービンを保護するために逃し弁を設けている
が、逃し弁は一般に高価であり、また原子力タービンの
このような部分に設けられる逃し弁は容量が大きいので
設置場所が大きくなる。また、逃し弁を定期的に分解点
検しなければならない。Problems to be Solved by the Invention As described above, conventionally, a relief valve is provided in order to prevent abnormal boosting at the time of sudden load reduction and protect the turbine, but the relief valve is generally expensive, and the Since the relief valve provided in such a portion has a large capacity, the installation location becomes large. In addition, the relief valve must be regularly disassembled and inspected.
このため、逃し弁を設ける方法は、その設備費及び保守
点検費が高くなる問題があった。特に、高圧タービン１
車室、低圧タービン３車室を一軸に結合した４車室６分
流排気であって、低圧タービンの両側にそれぞれ湿分分
離加熱器を配置している方式の原子力タービンプラント
では、その６つの分流系にそれぞれ逃し弁を設けること
から、その設備費及び保守点検費がより一層高くなって
いる。Therefore, the method of providing the relief valve has a problem that the equipment cost and the maintenance and inspection cost thereof are high. In particular, the high pressure turbine 1
In the case of a nuclear turbine plant of a type in which a vehicle compartment and a low-pressure turbine 3 vehicle compartments are uniaxially connected to each other in a 4-chamber 6-divided exhaust system, and a moisture separator / heater is arranged on each side of the low-pressure turbine. Since the relief valves are provided in each system, the equipment cost and the maintenance and inspection cost are further increased.
課題を解決するための手段 本考案は、このような従来技術の課題を解決するため
に、高圧タービン及び低圧タービンを備え、前記高圧タ
ービンの入口側に主蒸気止め弁と蒸気加減弁とからなる
第１の弁装置を有しているとともに、前記低圧タービン
の入口側に再熱蒸気止め弁とインターセプト弁とからな
る第２の弁装置を有しているタービンプラントにおい
て、前記高圧タービンと前記低圧タービンとの間の蒸気
管路にあって、前記第２の弁装置の上流位置に圧力スイ
ッチを設け、この圧力スイッチからの信号により前記第
１の弁装置の主蒸気止め弁又は蒸気加減弁を強制的に閉
じるように構成したものである。Means for Solving the Problems In order to solve the problems of the prior art, the present invention comprises a high pressure turbine and a low pressure turbine, and comprises a main steam stop valve and a steam control valve on the inlet side of the high pressure turbine. A turbine plant having a first valve device and a second valve device comprising a reheat steam stop valve and an intercept valve on the inlet side of the low pressure turbine, wherein the high pressure turbine and the low pressure turbine are provided. A pressure switch is provided at a position upstream of the second valve device in a steam pipeline between the turbine and the main steam stop valve or steam control valve of the first valve device by a signal from the pressure switch. It is configured to be closed forcibly.
作用 このような手段によれば、したがって、低圧タービン入
口側における第２弁装置の上流側圧力が異常に上昇する
前に、高圧タービン入口側における第１の弁装置の主蒸
気止め弁又は蒸気加減弁を圧力スイッチを介して閉じ
て、タービンを保護することができ、よって逃し弁を特
別に設ける必要はない。Action According to such means, therefore, before the upstream pressure of the second valve device on the low pressure turbine inlet side abnormally rises, the main steam stop valve or the steam control valve of the first valve device on the high pressure turbine inlet side is provided. The valve can be closed via a pressure switch to protect the turbine, thus eliminating the need for a special relief valve.
実施例 以下第１図を参照して本考案の一実施例について詳述す
る。なお、第１図において、第２図に示したものと同一
の部分には同一の符号を付して、その詳細な説明は省略
する。Embodiment An embodiment of the present invention will be described in detail below with reference to FIG. In FIG. 1, the same parts as those shown in FIG. 2 are designated by the same reference numerals, and detailed description thereof will be omitted.
しかして、本実施例によれば、高圧タービン１と低圧タ
ービン２との間の蒸気管路５にあって、湿分分離加熱器
６と再蒸気止め弁９との間、すなわち第２の弁装置13の
上流位置に圧力スイッチ14が設けられている。Therefore, according to this embodiment, in the steam line 5 between the high-pressure turbine 1 and the low-pressure turbine 2, between the moisture separation heater 6 and the re-steam stop valve 9, that is, the second valve. A pressure switch 14 is provided upstream of the device 13.
そして、この圧力スイッチ14は、再熱蒸気止め弁９の上
流側圧力がプラントの通常運転状態で計画された圧力
（通常運転圧力）を越え、最高使用圧力（設計圧力）未
満に設定された圧力に達すると、タービントリップ信号
を発信し、これにより主蒸気止め弁７を強制的に閉じ
る。したがって、万一誤動作によりインターセプト弁10
が閉でかつ蒸気加減弁８が開となった場合でも、異常昇
圧は生ぜず、タービンを確実に保護することができる。The pressure switch 14 has a pressure set such that the pressure on the upstream side of the reheat steam stop valve 9 exceeds the pressure (normal operating pressure) planned in the normal operating state of the plant and is less than the maximum operating pressure (design pressure). When it reaches, a turbine trip signal is transmitted, which forcibly closes the main steam stop valve 7. Therefore, in the unlikely event of malfunction, the intercept valve 10
Even when is closed and the steam control valve 8 is opened, abnormal boosting does not occur and the turbine can be reliably protected.
また、この圧力スイッチ14からのタービントリップ信号
により、主蒸気止め弁７ではなくて蒸気加減弁８を強制
的に閉じるようにしても、同様な作用効果が得られる。Further, even if the steam trip valve from the pressure switch 14 is used to forcibly close the steam control valve 8 instead of the main steam stop valve 7, the same effect can be obtained.
なお、主蒸気止め弁７は、他のタービントリップ信号、
例えば復水器３の真空度低下、タービン軸受の油圧低下
などによるタービントリップ信号によっても、閉じられ
るようになっている。The main steam stop valve 7 is used for other turbine trip signals,
For example, it can be closed by a turbine trip signal due to a decrease in the degree of vacuum of the condenser 3 or a decrease in hydraulic pressure of the turbine bearing.
考案の効果 以上詳述したように、本考案によれば、逃し弁を特別に
設けることなしに、負荷急減時における異常昇圧の発生
を防止して、タービンを保護することができ、したがっ
て逃し弁の設置に伴う設置費及び保守点検費をなくし
て、大幅なコストダウンを図ることができる。Advantageous Effect of the Invention As described in detail above, according to the present invention, it is possible to prevent abnormal boosting during sudden load reduction and protect the turbine without providing a special relief valve. It is possible to significantly reduce costs by eliminating the installation costs and maintenance and inspection costs associated with installation of.
第１図は本考案によるタービンプラントの一例を示す系
統図、第２図は従来例を示す図である。 １……高圧タービン、２……低圧タービン、３……復水
器、４……発電機、５……蒸気管路、６……湿分分離加
熱器、７……主蒸気止め弁、８……蒸気加減弁、９……
再熱蒸気止め弁、10……インターセプト弁、11……逃し
弁、12……第１の弁装置、13……第２の弁装置、14……
圧力スイッチ。FIG. 1 is a system diagram showing an example of a turbine plant according to the present invention, and FIG. 2 is a diagram showing a conventional example. 1 ... High pressure turbine, 2 ... Low pressure turbine, 3 ... Condenser, 4 ... Generator, 5 ... Steam line, 6 ... Moisture separation heater, 7 ... Main steam stop valve, 8 …… Steam control valve, 9 ……
Reheat steam stop valve, 10 …… intercept valve, 11 …… escape valve, 12 …… first valve device, 13 …… second valve device, 14 ……
pressure switch.
Claims (1)
記高圧タービンの入口側に主蒸気止め弁と蒸気加減弁と
からなる第１の弁装置を有しているとともに、前記低圧
タービンの入口側に再熱蒸気止め弁とインターセプト弁
とからなる第２の弁装置を有しているタービンプラント
において、前記高圧タービンと前記低圧タービンとの間
の蒸気管路にあって、前記第２の弁装置の上流位置に圧
力スイッチを設け、この圧力スイッチからの信号により
前記第１の弁装置の主蒸気止め弁又は蒸気加減弁を強制
的に閉じるように構成したことを特徴とするタービンプ
ラント。1. A high-pressure turbine and a low-pressure turbine, a first valve device comprising a main steam stop valve and a steam control valve on the inlet side of the high-pressure turbine, and the inlet side of the low-pressure turbine. In a turbine plant having a second valve device including a reheat steam stop valve and an intercept valve, a turbine plant having a second valve device in a steam pipeline between the high-pressure turbine and the low-pressure turbine A turbine plant, wherein a pressure switch is provided at an upstream position, and a signal from the pressure switch is configured to forcibly close the main steam stop valve or the steam control valve of the first valve device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8904888U JPH0748961Y2 (en) | 1988-07-06 | 1988-07-06 | Turbine plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8904888U JPH0748961Y2 (en) | 1988-07-06 | 1988-07-06 | Turbine plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0212003U JPH0212003U (en) | 1990-01-25 |
| JPH0748961Y2 true JPH0748961Y2 (en) | 1995-11-13 |
Family
ID=31313603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8904888U Expired - Lifetime JPH0748961Y2 (en) | 1988-07-06 | 1988-07-06 | Turbine plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0748961Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4494564B2 (en) * | 1999-11-24 | 2010-06-30 | 三菱重工業株式会社 | Steam turbine power generation equipment |
| JP4551168B2 (en) * | 2004-09-15 | 2010-09-22 | 三菱重工業株式会社 | Steam turbine power generation facility and operation method thereof |
-
1988
- 1988-07-06 JP JP8904888U patent/JPH0748961Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0212003U (en) | 1990-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0454806B2 (en) | ||
| US5042247A (en) | Overspeed protection method for a gas turbine/steam turbine combined cycle | |
| CN114687822A (en) | Control system and control method of steam turbine | |
| US3750395A (en) | Overspeed protection system for a turbo-generator unit | |
| US4080790A (en) | Safety system for a steam turbine installation | |
| JPH0259282B2 (en) | ||
| JP4494564B2 (en) | Steam turbine power generation equipment | |
| CN118517316A (en) | Steam turbine bypass device and control system thereof | |
| JP4551168B2 (en) | Steam turbine power generation facility and operation method thereof | |
| JPH086561B2 (en) | Turbomachine security equipment | |
| JPH045404A (en) | Compound electric power generating plant and method and device for preventing overspeed thereof | |
| JPH05312004A (en) | Condensate type steam turbine | |
| JPS6130002Y2 (en) | ||
| JPH11107706A (en) | Steam turbine security equipment | |
| JPH07279614A (en) | By-pass valve automatically warming device | |
| JPS6267205A (en) | Control system for steam turbine | |
| SU773300A1 (en) | Apparatus for protection of block-module steatm turbine plant | |
| JPH0336123B2 (en) | ||
| JP2985353B2 (en) | Steam turbine security equipment | |
| JPS5847203Y2 (en) | Steam turbine rotor cooling system | |
| JPS5820366B2 (en) | Turbine bypass valve control device | |
| JPH01138303A (en) | Valve driving device | |
| JPS5812450B2 (en) | Turbine protection device | |
| CN121576630A (en) | A modular nuclear small reactor high-efficiency cogeneration heating system | |
| JP2001193416A (en) | Steam turbine equipment |