CN102900057B - Under-pressure non-full opening method for main water inlet ball valve of hydropower station - Google Patents
Under-pressure non-full opening method for main water inlet ball valve of hydropower station Download PDFInfo
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- CN102900057B CN102900057B CN201210408852.5A CN201210408852A CN102900057B CN 102900057 B CN102900057 B CN 102900057B CN 201210408852 A CN201210408852 A CN 201210408852A CN 102900057 B CN102900057 B CN 102900057B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000007257 malfunction Effects 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 230000009897 systematic effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 41
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
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- 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
- Y02E10/20—Hydro energy
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Abstract
The invention belongs to the technical field of a hydropower station and especially relates to an under-pressure non-full opening method for a main water inlet ball valve of the hydropower station. The under-pressure non-full opening method is suitable for the hydraulic locking maintenance of a large-size main water inlet ball valve in front of a volute or the non-full opening operation for the main water inlet ball valve under the other conditions of bearing higher water pressure of a high-head hydropower station when a draining pipeline is not emptied. The non-full opening problem of the main water inlet ball valve of the high-head hydropower station is solved by the under-pressure non-full opening method provided by the invention; the under-pressure non-full opening method has the advantages of simple and easily implemented method, safety, reliability, greatly reduced construction period, capability of saving cost, and the like; the under-pressure non-full opening method is especially suitable for the hydropower station with higher water head, bigger volume and heavier heavy of the main water inlet ball valve and higher pressure bearing value; the under-pressure non-full opening method is approved by multi-parties and is practically checked; the practical check confirms that the method is safe and reliable; the operation process is systematic and perfect; the reference significance is great; and the popularization value is high.
Description
Technical field
The invention belongs to the technical field in power station, relate in particular to the method for a kind of water power station owner water intake ball valve not standard-sized sheet with pressure.Be applicable to high head hydroelectric power plant, do not needing when conduit pipe is emptying, to large-scale main water intake ball valve hydraulic locking maintenance before spiral case or other, need to main water intake ball valve, carry out the not operation of standard-sized sheet bearing in larger hydraulic pressure situation.
Background technology
The main water intake ball valve in high head hydroelectric power plant ran into ball valve body parts in the past needs maintenance, require ball valve not during the special circumstances of standard-sized sheet, because ball valve deadweight is large and high head water power plant diversion tunnel pressure is larger, for guaranteeing that safety can only be in the situation that all emptying by the water of conduit pipe, starting petrol station opens ball valve to required aperture, then close that ball valve servomotor enters draining valve or locked ball valve main distributing valve enters oil-discharging cavity, guarantee that ball valve process oil pipeline pressure oil remains unchanged, and makes ball valve rest on required aperture.
Because the general volume weight of main water intake ball valve of the employing before high head hydroelectric power plant's spiral case inlet is huge, and in order to guarantee the safety of unit, general this main water intake ball valve has the trend of closing voluntarily in the stress-free situation of pressure oil pipeline in structure design, so also only allow to rest under normal circumstances the position of complete shut-down or standard-sized sheet.While needing not standard-sized sheet as processed ball valve hydraulic locking or other parts, for guaranteeing safety, can only wait diversion tunnel emptying, under anhydrous condition, carry out, and water-filling after emptying diversion tunnel emptying and maintenance often needs the time in twenty or thirty sky, doing is like this effort again consuming time.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, the method for a kind of water power station owner water intake ball valve not standard-sized sheet with pressure is provided.
The technical scheme of object that the present invention realizes invention is as follows:
A method for water power station owner water intake ball valve not standard-sized sheet with pressure, it comprises water power station owner water intake ball valve, suspender belt, bridge machine or crane; Concrete implementation step is as follows:
(1) main water intake ball valve tank pressure is beaten to rated value, guaranteed that main water inlet valve system has enough operation oil pressure;
(2) governor oil pressure tank is beaten to rated value, guaranteed that stator has clamping stroke;
(3) little stator pressure is beaten to rated value, guaranteed that little stator has clamping stroke;
(4) manually drop into generator motor mechanical braking, and check that input cavity pressure is normal, guarantee that unit can not rotate;
(5) stator is hydraulically locked in and drops into position, prevent that stator from surprisingly opening caused unit and rotating;
(6) on oil gear switch board, open governor pressure oil tank isolating valve, make guide vane servomotor compress stator, prevent that unit from rotating;
(7) at electricity, adjust and check that stator clamping stroke keeps normal in a long time cashier's office in a shop;
(8) extract governor guide vane servomotor and automatically lock to throw and move back electromagnetic valve and exit plug, prevent that stator guide vane servomotor from automatically locking malfunction and exiting;
(9) pull up governor emergency shutdown electromagnetic valve, prevent unit malfunction;
(10) adjust main water intake ball valve servomotor on-off valve both sides bolt to the desired location of working, while finally guaranteeing main water intake ball valve unlatching, speed is slow, and aperture is controlled;
(11) 1 large oil pump of unlatching oil gear is standby to " zero load ";
(12) on oil gear switch board, open main water intake ball valve pressure oil tank isolating valve, pressure oil is provided to main water intaking valve oil pipe line;
(13) the manual main water intake ball valve hydraulic locking electromagnetic valve of excitation receding side, inspection is extracted after exiting to exit and is dropped into both sides plug, prevents the malfunction of main water intake ball valve hydraulic locking electromagnetic valve;
(14) check that main water intake ball valve upstream seal exits correctly;
(15) check that owner's water intake ball valve manual locking exits correctly;
(16) main water intake ball valve and the main water intake ball valve system of setting-out switch board electromagnetic valve terrain/distant place selector switch are switched to " terrain " position by " distant place ";
(17) on main water intake ball valve and setting-out switch board, open main water intake ball valve bypass valve, make main water intaking valve pressure at both sides balance;
(18) on main water intake ball valve and setting-out switch board, exit the sealing of main water intake ball valve downstream;
(19) check that main water intake ball valve received concora crush signal;
(20) on main water intake ball valve and setting-out switch board, press the manually opened button of main water intake ball valve, make main water intaking valve open to the aperture position needing;
(21) adjust main water intake ball valve servomotor on-off valve both sides bolt, close main water intake ball valve servomotor on-off valve, block main water intaking valve servomotor pressure oil loop, maintain the current aperture of main water intaking valve constant;
(22) at main water intake ball valve and setting-out switch board, close main water intake ball valve bypass valve, recover bypass valve closed condition;
(23) main water intake ball valve and the main water intake ball valve system of setting-out switch board electromagnetic valve terrain/distant place selector switch are switched to " excision " position by " terrain ", prevent malfunction;
(24) on oil gear switch board, close main water intake ball valve pressure oil tank isolating valve, cut off main water intaking valve oil pipe line pressure oil-source, prevent main water intaking valve action;
(25) main water intake ball valve servomotor is closed to chamber oil pipe line pressure release, and keep pressure release state, the pressure oil that prevents from closing in the oil pipe line of chamber is closed main water intaking valve;
(26) monitor the larger displacement of nothing in the stator normal and main water intake ball valve servomotor piston rod long period of clamping stroke, prevent the main water intaking valve action situation appearance that pipe valve is not closed completely and causes;
(27) observe certain hour without after abnormal, with bridge machine or lifting appliance, coordinate corresponding suspender belt to protect the pivoted arm of main water intake ball valve, this state 10 minutes and without after abnormal, can carry out relevant upkeep operation;
(28) after service work completes, recover main water intake ball valve and close chamber oil pipe line pressure release place, open main water intake ball valve pressure oil tank isolating valve, slowly open main water intake ball valve servomotor on-off valve both sides bolt, make main water intake ball valve slowly closing, drop into main water intake ball valve working seal and locking, and check each equipment normally.
Advantage of the present invention and good effect are:
The research that the present invention is deep ball valve operating principle and through a large amount of practice, under the premise that security is guaranteed, all utilize on-the-spot existing equipment, utilize brand-new method, do not need emptying conduit pipe, can solve the not standard-sized sheet problem under main water intake ball valve specific (special) requirements.
The solution of the invention the not standard-sized sheet problem with pressure of the main water intake ball valve in high head hydroelectric power plant, there is simple, safe and reliable, the great reduction of erection time of method, the advantage such as reduce expenses.Be particularly suitable for higher, the main water intake ball valve volume weight of head large and bear the power station that force value is higher.The present invention has passed through approval in many ways, and has passed through the check of practice, confirms that the method is safe and reliable, operating process system, perfect, and reference is large, has very strong promotional value.
Below in conjunction with specific embodiments of the invention, the present invention is described in detail.
The specific embodiment
Embodiment 1:
The present invention is the method for a kind of water power station owner water intake ball valve not standard-sized sheet with pressure, and when implementing, needed auxiliary security instrument comprises: one, one applicable of suspender belt, applicable bridge machine or crane.
The concrete implementation step of the present invention is as follows:
(1) main water intake ball valve tank pressure is beaten to rated value, guaranteed that main water inlet valve system has enough operation oil pressure;
(2) governor oil pressure tank is beaten to rated value, guaranteed that stator has clamping stroke;
(3) little stator pressure is beaten to rated value, guaranteed that little stator has clamping stroke;
(4) manually drop into generator motor mechanical braking, and check that input cavity pressure is normal, guarantee that unit can not rotate;
(5) stator is hydraulically locked in and drops into position, prevent that stator from surprisingly opening caused unit and rotating;
(6) on oil gear switch board, open governor pressure oil tank isolating valve, make guide vane servomotor compress stator, prevent that unit from rotating;
(7) at electricity, adjust and check that stator clamping stroke keeps normal in a long time cashier's office in a shop;
(8) extract governor guide vane servomotor and automatically lock to throw and move back electromagnetic valve and exit plug, prevent that stator guide vane servomotor from automatically locking malfunction and exiting;
(9) pull up governor emergency shutdown electromagnetic valve, prevent unit malfunction;
(10) adjust main water intake ball valve servomotor on-off valve both sides bolt to the desired location of working, while finally guaranteeing main water intake ball valve unlatching, speed is slow, and aperture is controlled;
(11) 1 large oil pump of unlatching oil gear is standby to " zero load ";
(12) on oil gear switch board, open main water intake ball valve pressure oil tank isolating valve, pressure oil is provided to main water intaking valve oil pipe line;
(13) the manual main water intake ball valve hydraulic locking electromagnetic valve of excitation receding side, inspection is extracted after exiting to exit and is dropped into both sides plug, prevents the malfunction of main water intake ball valve hydraulic locking electromagnetic valve;
(14) check that main water intake ball valve upstream seal exits correctly;
(15) check that owner's water intake ball valve manual locking exits correctly;
(16) main water intake ball valve and the main water intake ball valve system of setting-out switch board electromagnetic valve terrain/distant place selector switch are switched to " terrain " position by " distant place ";
(17) on main water intake ball valve and setting-out switch board, open main water intake ball valve bypass valve, make main water intaking valve pressure at both sides balance;
(18) on main water intake ball valve and setting-out switch board, exit the sealing of main water intake ball valve downstream;
(19) check that main water intake ball valve received concora crush signal;
(20) on main water intake ball valve and setting-out switch board, press the manually opened button of main water intake ball valve, make main water intaking valve open to the aperture position needing;
(21) adjust main water intake ball valve servomotor on-off valve both sides bolt, close main water intake ball valve servomotor on-off valve, block main water intaking valve servomotor pressure oil loop, maintain the current aperture of main water intaking valve constant;
(22) at main water intake ball valve and setting-out switch board, close main water intake ball valve bypass valve, recover bypass valve closed condition;
(23) main water intake ball valve and the main water intake ball valve system of setting-out switch board electromagnetic valve terrain/distant place selector switch are switched to " excision " position by " terrain ", prevent malfunction;
(24) on oil gear switch board, close main water intake ball valve pressure oil tank isolating valve, cut off main water intaking valve oil pipe line pressure oil-source, prevent main water intaking valve action;
(25) main water intake ball valve servomotor is closed to chamber oil pipe line pressure release, and keep pressure release state, the pressure oil that prevents from closing in the oil pipe line of chamber is closed main water intaking valve;
(26) monitor the larger displacement of nothing in the stator normal and main water intake ball valve servomotor piston rod long period of clamping stroke, prevent the main water intaking valve action situation appearance that pipe valve is not closed completely and causes;
(27) observe certain hour without after abnormal, with bridge machine or lifting appliance, coordinate corresponding suspender belt to protect the pivoted arm of main water intake ball valve, this state 10 minutes and without after abnormal, can carry out relevant upkeep operation;
(28) after service work completes, recover main water intake ball valve and close chamber oil pipe line pressure release place, open main water intake ball valve pressure oil tank isolating valve, slowly open main water intake ball valve servomotor on-off valve both sides bolt, make main water intake ball valve slowly closing, drop into main water intake ball valve working seal and locking, and check each equipment normally.
In the specific implementation, the present invention also need to be in whole operating process, high pressure oil jacking device, and unit brake switch board, governor switch board, water wheel chamber preferably has special messenger to nurse.When there are favourable turn abnormal conditions in unit, hydraulic oil jack-up can be dropped into, brake exits, and closes in time main water intake ball valve.In whole process, the rotating part of unit is forbidden construction.Need unified command, guarantee the unimpeded of communication.
Claims (1)
1. a method for water power station owner water intake ball valve not standard-sized sheet with pressure, it comprises water power station owner water intake ball valve, suspender belt, bridge machine or crane; It is characterized in that: concrete implementation step is as follows:
(1) main water intake ball valve tank pressure is beaten to rated value, guaranteed that main water inlet valve system has enough operation oil pressure;
(2) governor oil pressure tank is beaten to rated value, guaranteed that stator has clamping stroke;
(3) little stator pressure is beaten to rated value, guaranteed that little stator has clamping stroke;
(4) manually drop into generator motor mechanical braking, and check that input cavity pressure is normal, guarantee that unit can not rotate;
(5) stator is hydraulically locked in and drops into position, prevent that stator from surprisingly opening caused unit and rotating;
(6) on oil gear switch board, open governor pressure oil tank isolating valve, make guide vane servomotor compress stator, prevent that unit from rotating;
(7) at electricity, adjust and check that stator clamping stroke keeps normal in a long time cashier's office in a shop;
(8) extract governor guide vane servomotor and automatically lock to throw and move back electromagnetic valve and exit plug, prevent that guide vane servomotor from automatically locking malfunction and exiting;
(9) pull up governor emergency shutdown electromagnetic valve, prevent unit malfunction;
(10) adjust main water intake ball valve servomotor on-off valve both sides bolt to the desired location of working, while finally guaranteeing main water intake ball valve unlatching, speed is slow, and aperture is controlled;
(11) 1 large oil pump of unlatching oil gear is standby to " zero load ";
(12) on oil gear switch board, open main water intake ball valve pressure oil tank isolating valve, pressure oil is provided to main water intaking valve oil pipe line;
(13) the manual main water intake ball valve hydraulic locking electromagnetic valve of excitation receding side, inspection is extracted after exiting to exit and is dropped into both sides plug, prevents the malfunction of main water intake ball valve hydraulic locking electromagnetic valve;
(14) check that main water intake ball valve upstream seal exits correctly;
(15) check that owner's water intake ball valve manual locking exits correctly;
(16) main water intake ball valve and the main water intake ball valve system of setting-out switch board electromagnetic valve terrain/distant place selector switch are switched to " terrain " position by " distant place ";
(17) on main water intake ball valve and setting-out switch board, open main water intake ball valve bypass valve, make main water intaking valve pressure at both sides balance;
(18) on main water intake ball valve and setting-out switch board, exit the sealing of main water intake ball valve downstream;
(19) check that main water intake ball valve received concora crush signal;
(20) on main water intake ball valve and setting-out switch board, press the manually opened button of main water intake ball valve, make main water intaking valve open to the aperture position needing;
(21) adjust main water intake ball valve servomotor on-off valve both sides bolt, close main water intake ball valve servomotor on-off valve, block main water intaking valve servomotor pressure oil loop, maintain the current aperture of main water intaking valve constant;
(22) at main water intake ball valve and setting-out switch board, close main water intake ball valve bypass valve, recover bypass valve closed condition;
(23) main water intake ball valve and the main water intake ball valve system of setting-out switch board electromagnetic valve terrain/distant place selector switch are switched to " excision " position by " terrain ", prevent malfunction;
(24) on oil gear switch board, close main water intake ball valve pressure oil tank isolating valve, cut off main water intaking valve oil pipe line pressure oil-source, prevent main water intaking valve action;
(25) main water intake ball valve servomotor is closed to chamber oil pipe line pressure release, and keep pressure release state, the pressure oil that prevents from closing in the oil pipe line of chamber is closed main water intaking valve;
(26) monitor the larger displacement of nothing in the stator normal and main water intake ball valve servomotor piston rod long period of clamping stroke, prevent the main water intaking valve action situation appearance that pipe valve is not closed completely and causes;
(27) observe certain hour without after abnormal, with bridge machine or lifting appliance, coordinate corresponding suspender belt to protect the pivoted arm of main water intake ball valve, this state 10 minutes and without after abnormal, can carry out relevant upkeep operation;
(28) after service work completes, recover main water intake ball valve and close chamber oil pipe line pressure release place, open main water intake ball valve pressure oil tank isolating valve, slowly open main water intake ball valve servomotor on-off valve both sides bolt, make main water intake ball valve slowly closing, drop into main water intake ball valve working seal and locking, and check each equipment normally.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210408852.5A CN102900057B (en) | 2012-10-24 | 2012-10-24 | Under-pressure non-full opening method for main water inlet ball valve of hydropower station |
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| CN201210408852.5A CN102900057B (en) | 2012-10-24 | 2012-10-24 | Under-pressure non-full opening method for main water inlet ball valve of hydropower station |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103388552B (en) * | 2013-05-23 | 2015-12-02 | 国家电网公司 | Hydropower Unit valve control device and controlling method thereof |
| CN103453199B (en) * | 2013-09-13 | 2016-09-07 | 国家电网公司 | The method that unit normally starts is ensured during main water intaking valve bypass valve position dropout |
| CN104005389B (en) * | 2014-05-15 | 2015-09-09 | 国家电网公司 | The unlatching of water intaking valve and method for closing, device and water intaking valve control system |
| CN104846794A (en) * | 2015-04-22 | 2015-08-19 | 杭州富春江水电设备有限公司 | Water inlet main valve for hydropower station and operation method thereof |
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| DE3238556A1 (en) * | 1981-10-24 | 1983-05-11 | Kinemura, Masao, Hiroshima | Water-power station |
| SU1714035A1 (en) * | 1990-06-11 | 1992-02-23 | Восточно-Сибирское отделение Всесоюзного проектно-изыскательского и научно-исследовательского объединения "Гидропроект" им.С.Я.Жука | Method for inspection and repair of pressure tunnel of hydroelectric station |
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2012
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| SU1714035A1 (en) * | 1990-06-11 | 1992-02-23 | Восточно-Сибирское отделение Всесоюзного проектно-изыскательского и научно-исследовательского объединения "Гидропроект" им.С.Я.Жука | Method for inspection and repair of pressure tunnel of hydroelectric station |
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Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: LIAONING PUSHIHE WATER-STORAGE CO., LTD. Effective date: 20130922 Owner name: STATE GRID XINYUAN CO., LTD. LIAONING PUSHIHE WATE Effective date: 20130922 |
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Effective date of registration: 20130922 Address after: 100031 West Chang'an Avenue, Beijing, No. 86 Applicant after: State Grid Corporation of China Applicant after: State Grid Xinyuan Co., Ltd. Applicant after: Liaoning Pushihe Water-Storage Co., Ltd. Address before: 118216 Liaoning province Dandong City Zhen'an District Taiping Bay Applicant before: Liaoning Pushihe Water-Storage Co., Ltd. |
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