JPH0364682B2 - - Google Patents
Info
- Publication number
- JPH0364682B2 JPH0364682B2 JP16924784A JP16924784A JPH0364682B2 JP H0364682 B2 JPH0364682 B2 JP H0364682B2 JP 16924784 A JP16924784 A JP 16924784A JP 16924784 A JP16924784 A JP 16924784A JP H0364682 B2 JPH0364682 B2 JP H0364682B2
- Authority
- JP
- Japan
- Prior art keywords
- turbine
- test
- safety device
- circuit
- pressure switch
- 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
- 238000012360 testing method Methods 0.000 claims description 25
- 238000012790 confirmation Methods 0.000 claims description 12
- 230000002265 prevention Effects 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/20—Checking operation of shut-down devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電気回路のみによる保安装置を採用し
た蒸気タービン等に適用し得るタービン保安装置
の確認テスト方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a verification test method for a turbine safety device that can be applied to a steam turbine or the like that employs a safety device based only on an electric circuit.
従来の蒸気タービンの保安装置としては、例え
ば軸受油圧低下、スラスト軸受油圧増加および復
水器真空低下等が生じた場合に、機械的にタービ
ンをトリツプさせる装置が多く採用されて来た。
Conventional safety devices for steam turbines have often employed devices that mechanically trip the turbine when, for example, a drop in bearing oil pressure, an increase in thrust bearing oil pressure, or a drop in condenser vacuum occurs.
しかしながらこの種蒸気タービンの保安装置と
して、電気回路のみによる保安装置は未だ採用さ
れていなかつた。 However, as a safety device for this type of steam turbine, a safety device based only on an electric circuit has not yet been adopted.
例えばガバナ機構の簡素化や信頼性の向上を図
るために、タービン保安装置として例えば圧力ス
イツチを２重に設置し、電気回路のみによる保安
装置を採用することが望まれている。しかしなが
らこのような電気回路のみによる保安装置におい
ては、その信頼性を確認するために周期的に確認
テストを行う必要がある。
For example, in order to simplify the governor mechanism and improve its reliability, it is desired to install a pressure switch in duplicate as a turbine safety device, and to employ a safety device using only an electric circuit. However, in such a safety device using only an electric circuit, it is necessary to conduct confirmation tests periodically to confirm its reliability.
本発明は上記の事情に鑑みて提案されたもの
で、電気回路のみによる保安装置の確認テストを
安全且つ容易に行なうことができ、その信頼性を
向上し得るタービン保安装置の確認テスト方法を
提供することにある。 The present invention has been proposed in view of the above circumstances, and provides a confirmation test method for a turbine safety device that can safely and easily perform a confirmation test of a safety device using only an electric circuit, and that can improve its reliability. It's about doing.
本発明によるタービン保安装置の確認テスト方
法は、保安装置の圧力スイツチを２重化し、その
圧力スイツチのテスト時にタービントリツプ防止
機能を作動し、この状態で前記各圧力スイツチの
一方の油圧を低下させてその圧力スイツチの動作
をテストすることを特徴とするものである。
The confirmation test method for a turbine safety device according to the present invention involves duplicating the pressure switches of the safety device, activating the turbine trip prevention function during the test of the pressure switches, and lowering the oil pressure of one of the pressure switches in this state. The feature is that the operation of the pressure switch is tested by
本発明方法によれば、保安装置の圧力スイツチ
を２重化することにより電気回路のみの保安装置
を構成し、ガバナ機構の簡素化と信頼性の向上を
図り、各圧力スイツチのテスト時に予めタービン
トリツプ防止機能を作動させて、テスト時の油圧
低下に伴うタービントリツプを防止して安全に各
圧力スイツチの確認テストを行ない得るようにし
たものである。
According to the method of the present invention, by duplicating the pressure switches of the safety device, the safety device is configured with only an electric circuit, thereby simplifying the governor mechanism and improving reliability. By activating the trip prevention function, the turbine trip caused by the drop in oil pressure during the test can be prevented, allowing the confirmation test of each pressure switch to be carried out safely.
本発明の一実施例を添付図面を参照して詳細に
説明する。
An embodiment of the present invention will be described in detail with reference to the accompanying drawings.
図は本発明方法を実施するために用いられる保
安装置の一実施例を示すブロツク図であり、１は
Ａ側圧力スイツチ、２はＢ側圧力スイツチ、３は
操作スイツチ、４はタービントリツプ防止機能、
５〜７は各OR回路、８および９は各ワイプアウ
ト（Wipe Out）付ホールド回路、１０〜１４は
各AND回路、１５〜１８は各NOT回路、１９お
よび２０は各タービントリツプテスト装置であ
る。 The figure is a block diagram showing an embodiment of the safety device used to carry out the method of the present invention, in which 1 is an A side pressure switch, 2 is a B side pressure switch, 3 is an operation switch, and 4 is a turbine trip prevention block. function,
5 to 7 are each OR circuit, 8 and 9 are each hold circuit with wipe out, 10 to 14 are each AND circuit, 15 to 18 are each NOT circuit, 19 and 20 are each turbine trip test device. be.
図において例えば軸受油圧が低下すると、２重
圧力スイツチの中のＡ側圧力スイツチ１またはＢ
側圧力スイツチ２あるいはその両方が作動し、前
記各OR回路、AND回路およびNOT回路からな
る論理回路によりOR回路６が作動してタービン
を直ちにトリツプさせるようになされている。 In the figure, for example, when the bearing oil pressure decreases, the A side pressure switch 1 or B of the dual pressure switches
When the side pressure switch 2 or both are activated, the OR circuit 6 is activated by the logic circuit consisting of the OR circuit, AND circuit, and NOT circuit to trip the turbine immediately.
次に上記タービン保安装置の確認テスト方法に
ついて説明する。 Next, a confirmation test method for the turbine safety device will be explained.
図においてＡ側圧力スイツチ１のテストを例に
とつて説明すると、先ず操作スイツチ３をＡ側テ
スト位置にする。このときタービントリツプテス
ト装置１９がワイプアウトされているので前記の
ホールド回路８がオン、OR回路７がオンとな
り、タービントリツプ防止機能が作動し、Ａ側テ
スト中にＡ側圧力スイツチ１が作動してもタービ
ンがトリツプしないようになされる。この状態で
例えば手動弁を操作してＡ側の油圧を低下させ、
これによりＡ側圧力スイツチ１が動作するか否か
をテストし、その故障の有無を確認することがで
きる。この場合Ａ側の油圧を上記の如く人為的に
低下させることによりＡ側圧力スイツチ１が動作
しても、Ａ側がテスト中であるのでOR回路６は
オンとならず従つてタービンはトリツプされな
い。しかしながらＡ側のテスト中に仮りにＢ側の
油圧が低下した場合には、これは実際に異常が発
生したこととなるので、Ｂ側圧力スイツチ２の作
動により、OR回路６がオンとなり、タービンを
直ちにトリツプして保護する。 Taking the test of the A-side pressure switch 1 as an example in the figure, the operation switch 3 is first set to the A-side test position. At this time, since the turbine trip test device 19 has been wiped out, the aforementioned hold circuit 8 is turned on, the OR circuit 7 is turned on, the turbine trip prevention function is activated, and the A side pressure switch 1 is turned on during the A side test. This is done so that the turbine does not trip even when activated. In this state, for example, operate a manual valve to lower the oil pressure on the A side,
Thereby, it is possible to test whether the A-side pressure switch 1 operates or not, and to confirm whether or not there is a malfunction. In this case, even if the A-side pressure switch 1 is activated by artificially lowering the A-side oil pressure as described above, the OR circuit 6 will not be turned on because the A-side is being tested, and the turbine will not be tripped. However, if the oil pressure on the B side drops during the test on the A side, this means that an abnormality has actually occurred, so the OR circuit 6 is turned on by the operation of the B side pressure switch 2, and the turbine Immediately trip and protect.
以上はＡ側圧力スイツチ１の確認テストについ
て説明したが、Ｂ側圧力スイツチ２の確認テスト
も上記と全く同様にして行なうことができる。 Although the confirmation test for the A-side pressure switch 1 has been described above, the confirmation test for the B-side pressure switch 2 can also be carried out in exactly the same manner as described above.
なお上記各Ａ側およびＢ側圧力スイツチ１，２
の確認テスト後は、Ａ側およびＢ側の各油圧を人
為的に回復させると同時に、タービントリツプテ
スト装置１９，２０の各油圧も回復させて確認テ
ストを終了することゝなる。このテスト終了後に
操作スイツチ３を中間位置に戻す。この場合例え
ばタービントリツプテスト装置１９，２０の油圧
を回復させないうちに、操作スイツチ３を中間位
置に戻すと直ちにタービンがトリツプされ、これ
により油圧が回復しない限り、操作スイツチ３を
中間位置に戻してもテスト終了とはならないの
で、これによる該トリツプはしないことゝなる。 Note that each of the above A side and B side pressure switches 1 and 2
After the confirmation test, the hydraulic pressures on the A side and B side are artificially restored, and at the same time, the hydraulic pressures of the turbine trip test devices 19 and 20 are also restored to complete the confirmation test. After completing this test, return the operating switch 3 to the intermediate position. In this case, for example, if the operating switch 3 is returned to the intermediate position before the oil pressure of the turbine trip test devices 19, 20 is restored, the turbine will immediately be tripped, and unless the oil pressure is restored, the operating switch 3 will be returned to the intermediate position. However, the test will not end, so the trip will not be performed due to this.
以上により本発明方法によれば、圧力スイツチ
を２重化して電気回路のみによる保安装置を構成
することにより、ガバナ機構の簡素化と信頼性の
向上を図り、且つテスト時の油圧低下に伴うター
ビントリツプを防止しながらテストを行なうこと
により、各圧力スイツチの確認テストを安全且つ
容易に行なうことができ、これによりタービン保
安装置の信頼性を向上させることができる等の優
れた効果が奏せられるものである。
As described above, according to the method of the present invention, by duplicating the pressure switch and configuring a safety device using only an electric circuit, it is possible to simplify the governor mechanism and improve its reliability, and to prevent the turbine By performing the test while preventing trips, confirmation tests for each pressure switch can be performed safely and easily, which has great effects such as improving the reliability of the turbine safety device. It is something that can be done.
図は本発明方法を実施するために用いられる保
安装置の一例を示すブロツク図である。
１……Ａ側圧力スイツチ、２……Ｂ側圧力スイ
ツチ、３……操作スイツチ、４……タービントリ
ツプ防止機能、５〜７……OR回路、８，９……
ホールド回路、１０〜１４……AND回路、１５
〜１８……NOT回路、１９，２０……タービン
トリツプテスト装置。
The figure is a block diagram showing an example of a security device used to implement the method of the present invention. 1... A side pressure switch, 2... B side pressure switch, 3... Operation switch, 4... Turbine trip prevention function, 5 to 7... OR circuit, 8, 9...
Hold circuit, 10 to 14...AND circuit, 15
~18...NOT circuit, 19,20...Turbine trip test device.
Claims (1)
圧力スイツチのテスト時にタービントリツプ防止
機能を作動し、この状態で前記各圧力スイツチの
一方の油圧を低下させてその圧力スイツチの動作
をテストすることを特徴とするタービン保安装置
の確認テスト方法。1 Duplicate the pressure switches of the safety device, activate the turbine trip prevention function when testing each pressure switch, and in this state lower the oil pressure of one of the pressure switches to test the operation of that pressure switch. A confirmation test method for a turbine safety device, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16924784A JPS6149108A (en) | 1984-08-15 | 1984-08-15 | Confirmation test method of turbine protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16924784A JPS6149108A (en) | 1984-08-15 | 1984-08-15 | Confirmation test method of turbine protective device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6149108A JPS6149108A (en) | 1986-03-11 |
| JPH0364682B2 true JPH0364682B2 (en) | 1991-10-08 |
Family
ID=15882968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16924784A Granted JPS6149108A (en) | 1984-08-15 | 1984-08-15 | Confirmation test method of turbine protective device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6149108A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5814736A (en) * | 1981-07-17 | 1983-01-27 | 日本軽金属株式会社 | Heat insulating panel and its manufacture |
| JPH04287803A (en) * | 1991-03-19 | 1992-10-13 | Hitachi Ltd | Turbine overspeed prevention device |
-
1984
- 1984-08-15 JP JP16924784A patent/JPS6149108A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6149108A (en) | 1986-03-11 |
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