CN202227325U - Structure for reducing and preventing sound and vibration of service gate of water-filling gallery by means of natural ventilation - Google Patents
Structure for reducing and preventing sound and vibration of service gate of water-filling gallery by means of natural ventilation Download PDFInfo
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- CN202227325U CN202227325U CN2011203006694U CN201120300669U CN202227325U CN 202227325 U CN202227325 U CN 202227325U CN 2011203006694 U CN2011203006694 U CN 2011203006694U CN 201120300669 U CN201120300669 U CN 201120300669U CN 202227325 U CN202227325 U CN 202227325U
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- breastwork
- service gate
- water
- ventilation
- negative pressuren
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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 utility model discloses a structure for reducing and preventing sound and vibration of a service gate of a water-filling gallery by means of natural ventilation, which comprises the service gate. The structure is characterized in that a breast wall is arranged at the downstream of the service fate, a ventilating horizontal pipe is connected to the downstream side of the breast wall, a groove-shaped negative pressure area is arranged on the other side of the breast wall opposite to the ventilating horizontal pipe and is communicated with the ventilating horizontal pipe through a ventilating supporting hole arranged on the breast wall, and a main ventilating pipe which is connected to the ventilating horizontal pipe is communicated with the external atmosphere. The structure is simple in construction, small in work quantity, convenient in maintenance and capable of effectively solving the problems of sound and vibration of the water-filling gallery. The structure is tested and passes engineering validation, and is simple, small in reconstruction work amount, easy in construction and higher in engineering safety, and has a wide application prospect.
Description
Technical field
The anti-sound that this is practical newly the to relate to a kind of water-filling gallery structure of shaking, a kind of narrow slit high-velocity flow natural ventilation deduction and exemption water-filling gallery service gate sound structure of shaking of utilizing of saying so accurately.
Background technology
In recent decades, along with Chinese economic development, the water power cause obtains fast development, and large quantities of high head hydroelectric power plants build up in succession, makes China rank among high head water power plant, the world and builds the prostatitis.Head is up to tens of rice even over one hundred rice before and after the water-filling gallery service gate of power station; In the process that water-filling gallery service gate is opened; The flow rate of water flow of the narrow slit that forms between service gate panel and the breastwork is up to 40～50m; Water-filling gallery current are also up to 30m, and high-velocity flow makes the water-filling gallery behind the service gate form negative pressure region easily, and gallery necked-down section flow velocity is too high, " sound shakes " phenomenon can occur under the hypotony situation.If water-filling gallery service gate gallery section has obvious sound to shake; To cause that gallery limit wall destroys behind service gate panel, breastwork and the service gate, the shake phenomenon that can cause also that hydraulic pressure fluctuations strengthens, service gate opens a power pulsation increase, service gate and opening/closing system vibration aggravation thereof, a hinge pulsation increases, sound shakes of serious sound has a negative impact to water-filling gallery operational outfit even jeopardizes whole hydraulic structure safe operation.
Seek a kind of construct simple, engineering quantity little, the personnel that need not are on duty, effectively solve the engineering measure that water-filling gallery work gate segment sound shakes, and is this practical new starting point and final goal.
Practical fresh content
This practical new technical problem to be solved is: have shortcoming to above prior art, proposes a kind of construct simple, engineering quantity is little, the personnel that need not are on duty, also can effectively solve the structure that water-filling gallery work gate segment sound shakes.
The technical scheme of the above technical problem of this practical new solution is: a kind of natural ventilation deduction and exemption water-filling gallery service gate sound structure of shaking of utilizing is provided; Comprise service gate; It is characterized in that being provided with breastwork in said service gate downstream; The downstream of said breastwork is connected with the ventilation transverse tube, and said breastwork is provided with the groove shaped negative pressuren zone with respect to said ventilation transverse tube opposite side, and said negative pressuren zone and ventilation transverse tube prop up the hole and are connected perforation by being located at ventilation on the said breastwork; Being connected with the vent stack on the said ventilation transverse tube communicates with ambient atmosphere.
This practical new technical scheme that further limits is: the aforesaid natural ventilation deduction and exemption water-filling gallery service gate sound structure of shaking of utilizing, in order to reduce flow resistance, reduction sound shakes, said breastwork lower end edge water (flow) direction fillet flanging.
The aforesaid natural ventilation deduction and exemption water-filling gallery service gate sound structure of shaking of utilizing; Said service gate and said breastwork negative pressuren zone groove upside point, downside point and with the distance relation of said breastwork lower end fillet flanging starting point be 1: 1.5: 2, wherein said service gate and said breastwork negative pressuren zone groove upside point distance are 1.5～4.0cm.
The aforesaid natural ventilation deduction and exemption water-filling gallery service gate sound structure of shaking of utilizing, said breastwork negative pressuren zone groove realize height and said breastwork lower end fillet flanging starting point that height and said breastwork negative pressuren zone groove downside up and down put said breastwork lower end fillet flanging starting point concern to be 1: 2.5: 0.7 to the height distance of said breastwork low side.
Relation of height is 1: 3～4 about the aforesaid natural ventilation deduction and exemption water-filling gallery service gate sound structure of shaking of utilizing, said service gate and said breastwork negative pressuren zone groove upside dot spacing and the realization of said breastwork negative pressuren zone groove.
This practical new advantage is: the measure of breastwork natural ventilation is set up in (1) in work every well, workload is little, is easy to construction, and is easy to maintenance; (2) the breastwork natural ventilation also can reduce the vibration of service gate, makes the opening/closing system even running become possibility, reduces recondition expense, guarantees opening and closing device safety; (3) can effectively reduce the serious sound water-filling gallery flow fluctuation that causes that shakes and increase, aerated flow can effectively be protected gallery limit wall behind breastwork and the valve, reduces the engineering maintenance expense.
This practical new construction is simple, and engineering quantity is little, and is easy to maintenance, can effectively solve the water-filling gallery sound problem of shaking.This practical new validity is overtesting and engineering verification, and simple in structure, and the retrofit work amount is little, is easy to construction, has improved engineering safety, has broad application prospects.
Description of drawings
Fig. 1 is this practical new water-filling gallery breastwork arrangement diagram.
Fig. 2 is a cavitation noise intensity map under the water-filling gallery breastwork stuffiness situation that records of laboratory.
Fig. 3 is a cavitation noise intensity map under the water-filling gallery breastwork natural ventilation situation that records of laboratory.
Fig. 4 is that service gate is opened overall process noise intensity root mean square comparison diagram under the prototype water-filling gallery breastwork stuffiness natural ventilation situation.
The specific embodiment
Embodiment 1
Present embodiment is a kind of natural ventilation deduction and exemption water-filling gallery service gate sound structure of shaking of utilizing; Its structure is as shown in Figure 1; Comprise service gate 2, service gate 2 downstream are provided with breastwork 1, and the downstream of breastwork is connected with ventilation transverse tube 5; Breastwork is provided with groove shaped negative pressuren zone 7 with respect to ventilation transverse tube opposite side, and negative pressuren zone 7 props up hole 6 and is connected perforation by being located at ventilation on the breastwork with the transverse tube of ventilating; Be connected with vent stack 4 on the ventilation transverse tube and communicate breastwork lower end edge water (flow) direction fillet flanging with ambient atmosphere.
Operating principle: this covering device structure comprises breastwork 1 and leads to lock top vent stack 4 that along the ventilation transverse tube 5 that the width of corridor direction is arranged, vent stack 4 welds with ventilation transverse tube 5.Negative pressuren zone 7 and ventilation being provided with a ventilation hole 6 between the transverse tube 5, when service gate is opened, the narrow slit place since high-velocity flow in effect; At 7 zone formation stablizing negative pressuren zones; Air is sucked through vent stack 4, ventilation transverse tube 5, a ventilation hole 6 respectively naturally, realizes the breastwork natural ventilation, and aerated flow is through behind the narrow slit; After working panel and the blending of gallery current, suppress water-filling gallery sound and shake.
In the present embodiment, service gate and breastwork negative pressuren zone groove upside point, downside point and with the distance relation d1 of breastwork lower end fillet flanging starting point: d2: d3 is 1: 1.5: 2, and wherein service gate and breastwork negative pressuren zone groove upside point are 3.0cm apart from d1; Breastwork negative pressuren zone groove realizes height that height and breastwork negative pressuren zone groove downside up and down put breastwork lower end fillet flanging starting point and breastwork lower end fillet flanging starting point concern to be 1: 2.5: 0.7 to the height distance of breastwork low side; Service gate and breastwork negative pressuren zone groove upside dot spacing d1 and breastwork negative pressuren zone groove realize that the relation of width L1 is 1: 3 up and down.
Model test results points out that the breastwork ventilation can make full use of limited air inflow inhibition gallery sound and shake.Under breastwork natural ventilation and the stuffiness situation, noise intensity is to such as Fig. 2, shown in Figure 3, and visible by figure, the pulse of breastwork natural ventilation noise intensity reduces greatly, and sound shakes and is fully suppressed.
Fig. 4 is that service gate is opened overall process noise intensity root mean square comparison diagram under certain engineering prototype water-filling gallery breastwork stuffiness natural ventilation situation.Service gate is opened the overall process noise intensity and is only opened 10.69% of overall process noise intensity for the stuffiness service gate behind the natural ventilation.
Test also shows, after breastwork was realized stable natural ventilation, gallery sound shook that intensity weakens greatly even eliminates fully, thus open Men Li and behind the door gallery pressure fluctuation intensity also decrease, the spike number of times obviously reduces, peak value of pulse significantly reduces.
Originally practical newly can also have other embodiment, and the technical scheme that equal replacement of all employings or equivalent transformation form all drops within the scope of this practical new demand protection.
Claims (5)
1. one kind is utilized natural ventilation to reduce or remit the structure that water-filling gallery service gate sound shakes; Comprise service gate; It is characterized in that being provided with breastwork in said service gate downstream; The downstream of said breastwork is connected with the ventilation transverse tube, and said breastwork breastwork is provided with the groove shaped negative pressuren zone with respect to said ventilation transverse tube opposite side, and said negative pressuren zone and ventilation transverse tube prop up the hole and are connected perforation by being located at ventilation on the said breastwork; Being connected with the vent stack on the said ventilation transverse tube communicates with ambient atmosphere.
2. the natural ventilation deduction and exemption water-filling gallery service gate sound structure of shaking of utilizing according to claim 1 is characterized in that: said breastwork lower end edge water (flow) direction fillet flanging.
3. the natural ventilation deduction and exemption water-filling gallery service gate sound structure of shaking of utilizing according to claim 2; It is characterized in that: said service gate and said breastwork negative pressuren zone groove upside point, downside point and with the distance relation of said breastwork lower end fillet flanging starting point be 1:1.5:2, wherein said service gate and said breastwork negative pressuren zone groove upside point distance are 1.5 ~ 4.0cm.
4. the natural ventilation deduction and exemption water-filling gallery service gate sound structure of shaking of utilizing according to claim 2 is characterized in that: said breastwork negative pressuren zone groove realizes that height and said breastwork lower end fillet flanging starting point that height and said breastwork negative pressuren zone groove downside up and down put said breastwork lower end fillet flanging starting point are 1:2.5:0.7 to the height distance relation of said breastwork low side.
5. the natural ventilation deduction and exemption water-filling gallery service gate sound structure of shaking of utilizing according to claim 3 is characterized in that: relation of height is 1:3 ~ 4 about said service gate and said breastwork negative pressuren zone groove upside dot spacing and the realization of said breastwork negative pressuren zone groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203006694U CN202227325U (en) | 2011-08-18 | 2011-08-18 | Structure for reducing and preventing sound and vibration of service gate of water-filling gallery by means of natural ventilation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203006694U CN202227325U (en) | 2011-08-18 | 2011-08-18 | Structure for reducing and preventing sound and vibration of service gate of water-filling gallery by means of natural ventilation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202227325U true CN202227325U (en) | 2012-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203006694U Expired - Lifetime CN202227325U (en) | 2011-08-18 | 2011-08-18 | Structure for reducing and preventing sound and vibration of service gate of water-filling gallery by means of natural ventilation |
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| Country | Link |
|---|---|
| CN (1) | CN202227325U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594369A (en) * | 2014-11-27 | 2015-05-06 | 中国电建集团贵阳勘测设计研究院有限公司 | High-pressure group hole replacement grouting method and structure in karst region |
| CN106702993A (en) * | 2016-12-19 | 2017-05-24 | 水利部交通运输部国家能源局南京水利科学研究院 | Water conveying valve top water stop cavitation preventing method and structural arrangement |
-
2011
- 2011-08-18 CN CN2011203006694U patent/CN202227325U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594369A (en) * | 2014-11-27 | 2015-05-06 | 中国电建集团贵阳勘测设计研究院有限公司 | High-pressure group hole replacement grouting method and structure in karst region |
| CN106702993A (en) * | 2016-12-19 | 2017-05-24 | 水利部交通运输部国家能源局南京水利科学研究院 | Water conveying valve top water stop cavitation preventing method and structural arrangement |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120523 |