CN103557999B - A kind of method improving water turbine shear pin system failure investigation efficiency - Google Patents
A kind of method improving water turbine shear pin system failure investigation efficiency Download PDFInfo
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- CN103557999B CN103557999B CN201310507903.4A CN201310507903A CN103557999B CN 103557999 B CN103557999 B CN 103557999B CN 201310507903 A CN201310507903 A CN 201310507903A CN 103557999 B CN103557999 B CN 103557999B
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- 238000000034 method Methods 0.000 title claims abstract description 18
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- 238000011835 investigation Methods 0.000 title claims abstract description 16
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- 230000015572 biosynthetic process Effects 0.000 claims abstract description 5
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- 238000005273 aeration Methods 0.000 claims abstract description 3
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- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
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Abstract
The invention discloses a kind of method improving water turbine shear pin system failure investigation efficiency belonging to Water of Power Plant turbine equipment service technique scope.The method is for original system design and installation Shortcomings, determine whole system segmentation, each break pin can independently be controlled, namely manually operated control valve is installed additional in the import of each break pin air feed branch line, then independent aeration test is carried out, when pressurize 30min, if find that there is pressure drop to each break pin air feed branch line, then at break pin air feed branch line and the joint brushing suds of inflation, according to blister formation failure judgement point; Solve maintainer due to break pin air supply system joint more, investigation scope is comparatively large, and gas leakage point is difficult to find and judge, investigation is longer for man-hour, and inefficiency, unit cannot recover normal defect in time.Investigation scope when not only reducing fault after transformation, easy technique, shortens man-hour, eliminates defect in time, and does not affect main equipment safe operation after implementing.
Description
Technical field
The invention belongs to Water of Power Plant turbine equipment service technique scope, particularly a kind of method improving water turbine shear pin system failure investigation efficiency.
Background technology
Ming Tombs, Beijing storage power plant be State Grid Xinyuan Co., Ltd. directly under power plant, single-machine capacity 200,000 kilowatts, totally 4 units, water turbine shear pin system is every platform machine 16 stators, each stator respectively correspondence is equipped with 1 break pin, and forms a signal monitoring system with telltale and air supply system.Break pin is a kind of safety guard of turbine gate mechanism.According to the design concept of break pin, when water distributor is in course of action, stator by foreign matter block can not rotate time, namely break pin is cut off, thus completes the protection to whole water distributor.But; actual conditions are really not so; a large amount of statement of facts: break pin has more than and just cut off when stator is stuck; starting shooting, shut down, regulate and all may cut off phenomenon during the various operating condition such as load or crackle appears in break pin position; and occur that the phenomenon of crackle is more; because break pin air supply system joint is more; investigation scope is larger; gas leakage point is difficult to find and judge; investigation is longer for man-hour; be difficult to eliminate defect, inefficiency in 24 hours, unit cannot recover normal work in time.For solving the problem, be necessary to transform break pin system.
1. before transformation, break pin fault alarm arrange distinguish method mainly contains following three kinds:
(1) judge according to pigment seepage, when break pin occurs that fine cracks causes micro-seepage, cannot trouble spot be judged by pigment seepage.
(2) each joint brushing suds, judge according to blister formation, because joint is more, investigation scope is comparatively large, cannot promptly and accurately judge concrete trouble spot, considerably increase man-hour, reduce work efficiency.
(3) trouble spot is investigated one by one, disassembles if desired, and technique is relatively more cumbersome, and man-hour is relatively longer.(condition does not possess or does not allow)
Summary of the invention
The object of this invention is to provide a kind of method improving water turbine shear pin system failure investigation efficiency, water turbine shear pin system is every platform machine 16 stators, each stator respectively correspondence is equipped with 1 break pin, each break pin is connected with stainless steel annular air supply header by by air supply hose, and a signal monitoring system is formed together with telltale, break pin is a kind of safety guard of turbine gate mechanism; It is characterized in that, described method comprises:
(1) install manually operated control valve additional in the import of each break pin air feed branch line, separately each break pin carried out input and exited,
(2) manually operated control valve that installs additional of Close All, after all exiting, is separated with main supply air line; Then open the manually operated control valve installed additional one by one, carry out aeration test separately to each break pin air feed branch line, the test pump maximum working pressure (MWP) of use is 1.6Mpa, and test pressure is 1Mpa, pressurize 30min is with no pressure reduce to qualified;
(3) when pressurize 30min, if find that there is pressure drop, then at break pin air feed branch line and the joint brushing suds of inflation, according to blister formation failure judgement point;
(4) to there being trouble unit to change, repeat step (2) then and there, pressurize 30min is with no pressure reduce to qualified;
(5) open unit break pin steam supply valve, check that main supply air line tensimeter is without pressure drop, resumes operation.
The invention has the beneficial effects as follows that carrying out break pin air supply system in conjunction with unit equipment structure transforms, after transformation, break pin air supply system not only reduces fault investigation scope, easy technique, shorten man-hour, about 50 minutes are shortened to from tens hours, timely elimination defect, and do not affect main equipment safe operation after implementing.Actual inspection effect shows that the work installing manually operated control valve additional in the import of each break pin air feed branch line to gear to actual circumstances and effective, thus ensure that the safe and stable operation of unit.All technology taked are all can be generalized to other hydroelectric power plants, have good economic benefit and promotional value.
Accompanying drawing explanation
Fig. 1 is the break pin system architecture schematic diagram of transformation.
Embodiment
The invention provides a kind of method improving water turbine shear pin system failure investigation efficiency, below in conjunction with drawings and Examples, the present invention is further described.
Figure 1 shows that the water turbine shear pin system architecture schematic diagram of transformation.Water turbine shear pin system is every platform machine 16 stators (are enclosed within outside guide vane teunnion 6 by guide vane sleeve 7 and form), is fixed by break pin 4 by connecting lever 5 on stator top, corresponding 1 break pin 4 of stator; Manually operated control valve 2 is connected between break pin 4 and stainless steel annular air supply header 1 by air supply hose 3; And a signal monitoring system is formed together with telltale, break pin is a kind of safety guard of turbine gate mechanism.
The method of described raising water turbine shear pin system failure investigation efficiency comprises:
1. press shown in Fig. 1, install manually operated control valve 2 (selecting the DN15 two-piece type ball valve of good airproof performance) additional in the import of each break pin air feed branch line, close unit break pin system steam supply valve; Remove 16 DN15 stator break pin air supply hoses; Each stator correspondence position installs DN15 chip ball valve, and when mounted, the handle of DN15 chip ball valve should be placed on outside, does not affect the closedown of DN15 chip ball valve like this when checking, but should be fastening in case leak because vibrating, and connecting portion all uses fluid sealant; The air supply hose 3 of 16 stator break pins 4 is installed, joint area not damaged should be noted during installation, fit sealing;
2. the pressure test of pair break pin: Close All installs manually operated control valve additional, after all exiting, is separated with main supply air line, then opens one by one and installs manually operated control valve additional, inflate separately to each break pin air feed branch line; Carry out pressure test one by one to the air supply hose of 16 break pins and installation, the test pump maximum working pressure (MWP) that test uses is 1.6Mpa, and test pressure is 1Mpa, pressurize 30min is with no pressure reduce to qualified;
3. when pressurize 30min, if find that there is pressure drop, then at break pin air feed branch line and the joint brushing suds of inflation, according to blister formation failure judgement point;
4. pair have trouble unit to change then and there, repeat step 2, pressurize 30min is with no pressure reduce to qualified;
5. open unit break pin steam supply valve, check that main supply air line tensimeter is without pressure drop, resumes operation.
After transformation, effect inspection is as follows:
1. by test, only need after 16 valve Close Alls, then open one by one, the force value change shown by original pressure monitoring devices, just promptly and accurately can judge the position of trouble spot.
2. calculate man-hour by practical operation, only need 1 hour less than, substantially increase work efficiency, as shown in the table.
| Testing time | For the first time | For the second time | For the third time | Average man-hours |
| Actual hours | 55 minutes | 50 minutes | 55 minutes | 53.3 minutes |
3. decrease the compressor emergency shutdown processing time simultaneously.
4., because break pin body and pipeline leak gas the defect caused, as because of service requirement, the processing time does not possess can independently exit fault break pin, as emergency measure, to meet unit starting temporarily.
Claims (2)
1. one kind is improved the method for water turbine shear pin system failure investigation efficiency, water turbine shear pin system is every platform machine 16 stators, each stator respectively correspondence is equipped with 1 break pin, each break pin is connected with stainless steel annular air supply header by air supply hose, and a signal monitoring system is formed together with telltale, break pin is a kind of safety guard of turbine gate mechanism; It is characterized in that, described method comprises:
(1) install manually operated control valve additional in the import of each break pin air feed branch line, separately each break pin carried out input and exited,
(2) manually operated control valve that installs additional of Close All, after all exiting, is separated with main supply air line; Then open the manually operated control valve installed additional one by one, carry out aeration test separately to each break pin air feed branch line, the test pump maximum working pressure (MWP) of use is 1.6Mpa, and test pressure is 1Mpa, pressurize 30min is with no pressure reduce to qualified;
(3) when pressurize 30min, if find that there is pressure drop, then at break pin air feed branch line and the joint brushing suds of inflation, according to blister formation failure judgement point;
(4) to there being trouble unit to change, repeat step (2) then and there, pressurize 30min is with no pressure reduce to qualified;
(5) open unit break pin steam supply valve, check that main supply air line tensimeter is without pressure drop, resumes operation.
2. a kind of method improving water turbine shear pin system failure investigation efficiency according to claim 1, is characterized in that, described in the manually operated control valve that installs additional select the DN15 two-piece type ball valve of good airproof performance, to ensure leakage situation not to occur.
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| CN201310507903.4A CN103557999B (en) | 2013-10-24 | 2013-10-24 | A kind of method improving water turbine shear pin system failure investigation efficiency |
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| CN107152368B (en) * | 2017-07-13 | 2018-11-13 | 国家电网公司 | A kind of hydraulic turbine guide vane shear pin cutting signal detection system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1577341A (en) * | 1978-02-20 | 1980-10-22 | British Hovercraft Corp Ltd | Shear pin load cell load measuring equipment |
| US5883303A (en) * | 1998-02-10 | 1999-03-16 | Bliss; Brad D. | Apparatus and method for pigging, flooding, and pressure testing pipelines |
| CN201107243Y (en) * | 2007-10-31 | 2008-08-27 | 天津市天发重型水电设备制造有限公司 | Novel shearing experiment tool |
| CN201382846Y (en) * | 2009-04-09 | 2010-01-13 | 江苏万盛铸造有限公司 | Multifunctional pressure test leak detection equipment |
| CN102865974A (en) * | 2012-09-14 | 2013-01-09 | 北京二七轨道交通装备有限责任公司 | Leakage detection method for air pipelines of large-sized road maintenance machine product |
-
2013
- 2013-10-24 CN CN201310507903.4A patent/CN103557999B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1577341A (en) * | 1978-02-20 | 1980-10-22 | British Hovercraft Corp Ltd | Shear pin load cell load measuring equipment |
| US5883303A (en) * | 1998-02-10 | 1999-03-16 | Bliss; Brad D. | Apparatus and method for pigging, flooding, and pressure testing pipelines |
| CN201107243Y (en) * | 2007-10-31 | 2008-08-27 | 天津市天发重型水电设备制造有限公司 | Novel shearing experiment tool |
| CN201382846Y (en) * | 2009-04-09 | 2010-01-13 | 江苏万盛铸造有限公司 | Multifunctional pressure test leak detection equipment |
| CN102865974A (en) * | 2012-09-14 | 2013-01-09 | 北京二七轨道交通装备有限责任公司 | Leakage detection method for air pipelines of large-sized road maintenance machine product |
Non-Patent Citations (1)
| Title |
|---|
| 远程电站活动导叶破断剪断销的检测;张利民;《东方电机》;20080228(第1期);第76－78页 * |
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