CN102409646B - Method for eliminating acoustic vibration of working gate of water-filling gallery of constructed project - Google Patents
Method for eliminating acoustic vibration of working gate of water-filling gallery of constructed project Download PDFInfo
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- CN102409646B CN102409646B CN201110237310.1A CN201110237310A CN102409646B CN 102409646 B CN102409646 B CN 102409646B CN 201110237310 A CN201110237310 A CN 201110237310A CN 102409646 B CN102409646 B CN 102409646B
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- breastwork
- aerator
- service gate
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- water
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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 relates to a method for eliminating acoustic vibration of a working gate of a water-filling gallery in a constructed project. The water-filling gallery comprises a breast wall, an aerator and an omega-shaped water stopper. The method comprises the following steps of: adding a main steel ventilating pipe in a working gate shaft, adding a steel pressure stabilizing barrel along the width direction of the gallery, and welding a ventilating pipe with the pressure stabilizing barrel; leading the ventilating pipe to a gate crest along the wall of the working gate shaft, and arranging a branch ventilating hole on the aerator; and when a valve is opened, forming a stable negative pressure region below an aerator plate so that air is naturally sucked so as to realize natural ventilation of the breast wall. The method is a supplementary measure for the problem that no acoustic vibration prevention measures or improper acoustic vibration prevention measures are adopted in design of the constructed project to cause obvious acoustic vibration at a gallery segment and further produce negative effects on running equipment of the water-filling gallery. The method has the advantages of simple construction process and small engineering quantity, and is convenient in maintenance; and the method can be used for effectively solving the problem of acoustic vibration of the water-filling gallery in the constructed project.
Description
Technical field
Anti-sound vibration means or the improper rear benefit engineering method of anti-sound vibration means are not set, specifically a kind of method that built engineering water filled gallery service gate natural ventilation device deduction and exemption water filled gallery sound is shaken while the present invention relates to one to built engineering water filled gallery design.
Background technology
In recent decades, along with China's expanding economy, hydropower obtains fast development, and large quantities of high head hydroelectric power plants build up in succession, makes China rank among construction prostatitis, high head water power plant, the world.But due to the limitation of thought of people understanding and scientific and technological level, quite a few high head water power plant water filled gallery, when designing and constructing, anti-sound vibration means is not set or anti-sound vibration means is improper, water filled gallery service gate gallery section has obvious sound to shake, cause service gate panel, after breastwork and service gate, gallery limit wall destroys, serious sound shakes and also can cause hydraulic pressure fluctuations to strengthen, service gate opens a power pulsation and increases, service gate and opening/closing system vibration aggravation thereof, propping up hinge pulsation increases, the sound phenomenon of shaking has a negative impact and even jeopardizes whole hydraulic structure safe operation water filled gallery operational outfit.
When generation sound shakes, building vibration when the gallery water-filling of certain power station, the access door well after service gate is a burst of jet, and more than 10 meter of high spray and dust are gone out by concrete cover gap place, are mixed with huge explosive sound; The piston rod of hydraulic system, suspension rod, petroleum pipeline obviously vibrate.Hydraulic switch system is often because pressure switch malfunction is shut down; When water-filling, in active well, current rotary roll is strong, causes service gate well and serious noise pollution around; Huge vibration effect the safe operation of generating equipment.
Seek a kind of construct simple, engineering quantity is little, easy to maintenance, effectively solve the engineering measure that built water filled gallery work gate segment sound shakes, and is starting point of the present invention and final goal.
Summary of the invention
Technical problem to be solved by this invention is: for above prior art existent defect, propose a kind of construct simple, engineering quantity is little, on duty without personnel, also can effectively solve the method that built water filled gallery work gate segment sound shakes.
The technical scheme that the present invention solves above technical problem is: a kind of method that built engineering water filled gallery service gate sound shakes of reducing or remitting is provided, comprise work every well of service gate and service gate upper end, be provided with breastwork in described service gate downstream, in work every well of described breastwork top, be provided with voltage stabilizing bucket along width of corridor direction, described lower end connects the aerator with a ventilation hole, described aerator is located between described service gate and breastwork, between described aerator and described service gate, be provided with Ω type sealing, described voltage stabilizing bucket is through the gap UNICOM between service gate and breastwork described in the ventilation Zhi Kongyu of described aerator, described voltage stabilizing bucket and ventilating pipe welding are led to lock top along work every well borehole wall, in the time that work is opened, aerator below forms stable negative pressuren zone, and ventilating pipe leads to lock top along work every well, and aerator arranges a ventilation hole, and aerator below forms stable negative pressuren zone, and air natural is inhaled into, and realizes breastwork natural ventilation.
The technical scheme that the present invention further limits is: the method that the built engineering water filled gallery of aforesaid deduction and exemption service gate sound shakes, in order to reduce flow resistance, reduction sound shakes, described breastwork lower end edge water (flow) direction fillet flanging.
The method that the built engineering water filled gallery of aforesaid deduction and exemption service gate sound shakes, described service gate and described breastwork negative pressuren zone upside point, downside point and with the distance relation of described breastwork lower end fillet flanging starting point be 1:1.5:2, wherein said service gate and described breastwork negative pressuren zone upside point distance are 1.5 ~ 4.0cm.
Advantage of the present invention is: (1) sets up the measure of breastwork natural ventilation in work every well, and retrofit work amount is little, is easy to construction, easy to maintenance; (2) breastwork natural ventilation also can reduce the vibration of service gate, makes opening/closing system even running become possibility, reduces recondition expense, guarantees opening and closing device safety; (3) can effectively reduce the shake water filled gallery flow fluctuation that causes of serious sound and increase, aerated flow can effectively be protected gallery limit wall after breastwork and valve, reduces engineering maintenance expense.
The present invention constructs simply, and engineering quantity is little, easy to maintenance, can effectively solve the built engineering water filled gallery sound problem of shaking.Validity of the present invention is overtesting and engineering verification, and simple in structure, and retrofit work amount is little, is easy to construction, has improved engineering safety, has broad application prospects.
Brief description of the drawings
Fig. 1 is water filled gallery breastwork arrangement diagram of the present invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is cavitation noise spectral contrast figure in the ventilation of water filled gallery breastwork and stuffiness situation.
Fig. 4 is oil cylinder working-pressure pulsation amplitude in the ventilation of water filled gallery breastwork and stuffiness situation.
Fig. 5 is fluctuation intensity contrast in the ventilation of water filled gallery breastwork and stuffiness situation.
Detailed description of the invention
embodiment 1
The present embodiment is a kind of method that built engineering water filled gallery service gate sound shakes of reducing or remitting, its structure as depicted in figs. 1 and 2, comprise breastwork 8, aerator 3, Ω type sealing 5, in work every well, set up steel vent stack 1, set up steel voltage stabilizing bucket 2 in width of corridor direction, ventilating pipe 1 welds with voltage stabilizing bucket 2.Ventilating pipe 1 leads to lock top along work every well borehole wall 10, and a ventilation hole 4 is set on aerator 3, and when work is opened, aerator below forms stable negative pressuren zone 7, and air natural is inhaled into, and realizes breastwork natural ventilation.
Breastwork is located at service gate 6 downstreams, in work every well of breastwork top, be provided with voltage stabilizing bucket 2 along width of corridor direction, lower end connects the aerator 3 with a ventilation hole, aerator 3 is located between service gate 6 and breastwork 8, between aerator 3 and service gate 6, be provided with Ω type sealing 5, voltage stabilizing bucket 2 props up the gap UNICOM between hole 4 and service gate 6 and breastwork 8 through the ventilation of aerator; Voltage stabilizing bucket 2 welds along work every well borehole wall 10 and leads to lock top with ventilating pipe 1; In the time that service gate is opened, aerator below forms stable negative pressuren zone, and ventilating pipe leads to lock top along work every well, aerator arranges a ventilation hole, and aerator below forms stable negative pressuren zone, and air natural is inhaled into, realize breastwork natural ventilation, breastwork lower end edge water (flow) direction fillet flanging; Service gate and breastwork negative pressuren zone upside point, downside point and with the distance relation d1:d2:d3 of breastwork lower end fillet flanging starting point be 1:1.5:2, wherein service gate and breastwork negative pressuren zone upside point are 1.5 ~ 4.0cm apart from d1.
After water filled gallery breastwork ventilating pipe is set up, breastwork is realized after natural ventilation, has greatly improved working environment.Before improvement, certain high head water power plant water filled gallery water filling process is followed intensive thundering, a burst of explosion sound that adulterates, and access door manhole cover plate is lifted by powerful blast, and gap place produces strong expiration and inspiratory phenomenon, and water smoke, dust soar.After improvement, strong vibration, roar disappears substantially, and its intensity and number of times significantly reduce, and access door blowout, inspiratory phenomenon obviously weaken, water roll-ing strength decreased after service gate, service condition and working environment obviously improve.
Model test results points out, other ventilation measure of breastwork ventilation ratio can more make full use of limited air inflow and suppress gallery sound and shake.In breastwork ventilation ventilation and stuffiness situation, noise spectrum contrasts as shown in Figure 3, and as seen from the figure, after ventilation, noise spectrum on average reduces by 40～50dB, and pulse amplitude reduces greatly, and sound shakes and is fully suppressed.
The size of Qi Menli depends on the uplift force of valve well whirlpool boiling water stream to valve generation and the variation of the lower suction of root edge low-pressure area to valve generation.Before and after ventilation, oil cylinder working-pressure graph shape is substantially similar.Qi Menli pulsation closely related with fluidised form before and after valve, shake and open the moving peak value of portal vein under condition and often appear at larger opening there is not behind the door sound, be a strong exciting source of service gate because sound shakes, thereby Qi Menli pulsation enlarge markedly in the time that sound shakes generation, especially comparatively violent with the pulsation of cylinder top.
Realize after stable natural ventilation at breastwork, the gallery sound intensity of shaking greatly weakens even completely and to eliminate, thus open Men Li and behind the door gallery pressure fluctuation intensity also decrease, spike number of times obviously reduces, peak value of pulse significantly reduces.Fig. 4 has provided ventilation front and back oil cylinder working-pressure pulsation amplitude.Fig. 5 has provided ventilation and stuffiness situation fluctuation intensity (pulsation root-mean-square value) contrast.
The present invention can also have other embodiment, as long as water-delivery valve adopts anti-arc door pattern, door top adopts breastwork natural ventilation, within all anti-arc everys top breastwork build all drops on the scope of protection of present invention.
Claims (1)
1. the method that the built engineering water filled gallery service gate sound of deduction and exemption shakes, comprise work every well of service gate and service gate upper end, be provided with breastwork in described service gate downstream, described breastwork lower end edge water (flow) direction fillet flanging, it is characterized in that, in work every well of described breastwork top, be provided with voltage stabilizing bucket along width of corridor direction, described lower end connects the aerator with a ventilation hole, described aerator is located between described service gate and breastwork, between described aerator and described service gate, be provided with Ω type sealing, described voltage stabilizing bucket is through the gap UNICOM between service gate and breastwork described in the ventilation Zhi Kongyu of described aerator, described voltage stabilizing bucket and ventilating pipe welding are led to lock top along work every well borehole wall, in the time that service gate is opened, aerator below forms stable negative pressuren zone, and ventilating pipe leads to lock top along work every well, and aerator arranges a ventilation hole, and aerator below forms stable negative pressuren zone, and air natural is inhaled into, and realizes breastwork natural ventilation, described service gate and described breastwork negative pressuren zone upside point, downside point and with the distance relation of described breastwork lower end fillet flanging starting point be 1:1.5:2, wherein said service gate and described breastwork negative pressuren zone upside point distance are 1.5 ~ 4.0cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110237310.1A CN102409646B (en) | 2011-08-18 | 2011-08-18 | Method for eliminating acoustic vibration of working gate of water-filling gallery of constructed project |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110237310.1A CN102409646B (en) | 2011-08-18 | 2011-08-18 | Method for eliminating acoustic vibration of working gate of water-filling gallery of constructed project |
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| CN102409646A CN102409646A (en) | 2012-04-11 |
| CN102409646B true CN102409646B (en) | 2014-07-23 |
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| CN108386724B (en) * | 2018-04-19 | 2019-12-03 | 长江勘测规划设计研究有限责任公司 | The device for preventing pressure steel pipe of hydropower station from resonating |
Citations (3)
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|---|---|---|---|---|
| JP2006316487A (en) * | 2005-05-12 | 2006-11-24 | Chugoku Electric Power Co Inc:The | Entrained-air control system for headrace |
| CN201447696U (en) * | 2009-07-03 | 2010-05-05 | 水利部交通部电力工业部南京水利科学研究院 | Door head body type for avoiding cavitation of constructed shiplock valve |
| CN201447697U (en) * | 2009-07-03 | 2010-05-05 | 水利部交通部电力工业部南京水利科学研究院 | Door header body type capable of suppressing and reducing cavitation of a ship lock flat valve top-seam and bottom edge |
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- 2011-08-18 CN CN201110237310.1A patent/CN102409646B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006316487A (en) * | 2005-05-12 | 2006-11-24 | Chugoku Electric Power Co Inc:The | Entrained-air control system for headrace |
| CN201447696U (en) * | 2009-07-03 | 2010-05-05 | 水利部交通部电力工业部南京水利科学研究院 | Door head body type for avoiding cavitation of constructed shiplock valve |
| CN201447697U (en) * | 2009-07-03 | 2010-05-05 | 水利部交通部电力工业部南京水利科学研究院 | Door header body type capable of suppressing and reducing cavitation of a ship lock flat valve top-seam and bottom edge |
Non-Patent Citations (2)
| Title |
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| 三峡工程永久船闸水力学研究;须清华等;《中国三峡建设》;19980930(第09期);第1-4、35页 * |
| 须清华等.三峡工程永久船闸水力学研究.《中国三峡建设》.1998,(第09期), |
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