CN102286965B - Reversed tainter valve gallery backward protruding and expanding anticavitation forced ventilation method for high-head lock - Google Patents
Reversed tainter valve gallery backward protruding and expanding anticavitation forced ventilation method for high-head lock Download PDFInfo
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- CN102286965B CN102286965B CN201110214340.0A CN201110214340A CN102286965B CN 102286965 B CN102286965 B CN 102286965B CN 201110214340 A CN201110214340 A CN 201110214340A CN 102286965 B CN102286965 B CN 102286965B
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Abstract
The invention relates to an anticavitation forced ventilation method for a high-head lock, in particular to a reversed tainter valve gallery backward protruding and expanding anticavitation ventilation method for the high-head lock. A high-head lock valve is a reversed tainter valve, a gallery behind the valve is protruded and expanded, and dropping ridges are step dropping ridges; a first stage step of the step ridges is used as an aeration slot; a vent pipe is buried behind the first stage step of the step dropping ridges; the vent pipe is connected to one end of a forced vent pipe; the forced vent pipe is raised to the top of the lock and the other end of the forced vent pipe is connected with an air collection tank and an air compressor sequentially through a connection pipe which is provided with a flow meter and a control valve; the forced vent pipe is provided with a pressure sensor; and after the venting task is started, the pressure value of the air collection tank can be set according to the required ventilatory capacity, the air compressor is used for pressurization, and the vent pipe is used for forced venting. The anticavitation forced ventilation method can effectively reduce the cavitation strength of the dropping ridges and rising ridges, and reduce the engineering cost and construction difficulty, and the device is convenient to overhaul and maintain.
Description
Technical field
The present invention relates to high-lift lock anti-cavitation vent method, a kind of sudden-enlargement gallery behind high-lift lock reverse tainter gate vent method specifically.
Background technology
Along with development and the promotion of China's inland water transport cause, high-lift lock occurs in succession, if the high speed hydraulics problem of bringing is dealt with improperly thereupon, can affect the safe operation of ship lock, and wherein the valve section cavitation phenomenon is all the focus of research and design all the time.
Through the exploration practice of decades, the scientific research personnel is making great progress aspect check valve gate segment cavitation.Effective measures are builds that anti-arc is taked sudden expansion behind the door, by a lot of engineerings, are adopted at present.End sudden expansion can effectively increase aperture jet area, thereby reduces flow velocity, improves self cavitation number, and the root edge cavitation is obviously weakened.But sudden expansion build in the end has also increased and has fallen bank and rise bank two cavitation sources, place in deduction and exemption root edge cavitation.Especially rising the bank cavitation may occur on the interface that rises convolution district after Kan Chu or main flow and bank.If cavitation occurs after rising bank, cavity may be carried into downstream by main flow and crumble and fall, and has not only enlarged the occurrence scope of cavitation but also has affected the safety of maintenance gate slot.
For falling the bank cavitation, there are at present two kinds of measures to solve.The more steel plate liner mask of taking on first engineering; Another kind is to fall the bank natural ventilation, but this method is only applicable to dull and stereotyped valve, the ogee gate, because its root edge is moving boundary, is difficult for and falls bank forming stable flow section, the cavity that causes ventilating is unstable, therefore can not guarantee to realize natural ventilation in the aperture scope of falling bank generation cavitation.The sudden expansion body rises the bank Cavitation Problems and generally by optimization, rises the solution of bank build, although certain effect that these methods can be got has increased construction investment, and has brought a lot of inconvenience to construction and repair and maintenance.Therefore how to solve better anti-arc behind the door the sudden expansion build bring rise bank and fall the bank cavitation, become the problem that design and scientific research and testing personnel pay special attention to.
Summary of the invention
Technical problem to be solved by this invention is: for above prior art existent defect, a kind of sudden-enlargement gallery behind high-lift lock reverse tainter gate artificial aeration method is proposed, both can effectively reduce and fall bank and rise bank cavitation intensity, can reduce construction costs and difficulty of construction again, and facilitate repair and maintenance.
The technical scheme that the present invention solves above technical problem is:
Sudden-enlargement gallery behind high-lift lock reverse tainter gate artificial aeration method, the high-lift lock valve adopts anti-arc door, and valve gallery sudden expansion is behind the door fallen bank and is adopted notch cuttype to fall bank; Utilize notch cuttype to fall the first order ladder of bank as the aeration groove, fall the back of the first order ladder of bank at notch cuttype and bury ventilating pipe underground, ventilating pipe is connected to an end of an artificial aeration pipe, the artificial aeration pipe rises to the lock top, its other end connects air collector and air compressor successively by tube connector, tube connector is provided with flow meter and control valve, and the artificial aeration pipe is provided with pressure sensor; After the ventilation task starts, throughput is as required set the atmospheric pressure value of air collector, utilizes described air compressor supercharging, by described ventilating pipe, carries out artificial aeration.
Like this, after artificial aeration, air enters the sudden expansion body with main flow, finally is carried into and rises the bank end, not only can reduce or remit and rise the bank cavitation, and can protect the base plate fallen under bank, also favourable to the root edge cavitation.
The technical scheme that the present invention further limits is:
Aforesaid sudden-enlargement gallery behind high-lift lock reverse tainter gate artificial aeration method, ventilating pipe comprises a row ventilate arm and a vent stack, one row's ventilation arm is embedded in the back of first order ladder, each arm of ventilating is communicated to a horizontal vent stack, vent stack's two ends are positioned at the dual-side wall of first order ladder, and vent stack's two ends are connected to an end of artificial aeration pipe.Like this, the ventilation arm connects the artificial aeration pipe by the vent stack, simple in structure, and easy access is safeguarded.
Aforesaid sudden-enlargement gallery behind high-lift lock reverse tainter gate artificial aeration method, ventilating pipe is a semicircle ventilation transverse tube, semicircle ventilation transverse tube is embedded in the back of first order ladder, directly build formation after first order ladder, the baseplane of semicircle ventilation transverse tube is in the face of the vertical plane of first order ladder, the baseplane steel facing of semicircle ventilation transverse tube, be equipped with air vent in the steel plate equal intervals.Can directly build formation like this, greatly reduce difficulty of construction and reduced construction costs.
Aforesaid sudden-enlargement gallery behind high-lift lock reverse tainter gate artificial aeration method, ventilating pipe is a rectangle ventilation transverse tube, rectangle ventilation transverse tube is embedded in the back of first order ladder, directly build formation after first order ladder, a side plane of rectangle ventilation transverse tube is in the face of the vertical plane of first order ladder, the side plane steel facing, be equipped with air vent in the steel plate equal intervals.Can directly build formation like this, greatly reduce difficulty of construction and reduced construction costs.
Aforesaid sudden-enlargement gallery behind high-lift lock reverse tainter gate artificial aeration method, the first order ladder height that notch cuttype falls bank is 18～22 cm.
Aforesaid sudden-enlargement gallery behind high-lift lock reverse tainter gate artificial aeration method, the difference of the air pressure of air collector and described pressure sensor value is no more than 0.1～0.2Mpa.
Advantage of the present invention is: (1) artificial aeration can fully suppress to rise the bank cavitation, and protection rises gallery and the access door well after bank itself and sudden expansion body; (2) artificial aeration can suppress to fall the bank cavitation fully, " positice ground effect " of aerated flow reaches protection fall bank and fall bank after base plate exempt from the purpose of cavitation erosion; (3) artificial aeration is favourable to deduction and exemption root edge cavitation, and three place's cavitations are reduced or remitted in place ventilation simultaneously, effectively simple; (4) with respect to the technology of former complexity, artificial aeration greatly reduces difficulty of construction and has reduced construction costs, and easy access is safeguarded; (5) artificial aeration does not need to consider the condition of negative pressure of natural ventilation, and the scope of application is wider.In Aided Locked Design, the anti-cavitation design of valve is a difficult problem always, and it is directly connected to the safe operation of engineering, and the present invention is simple in structure, reliable, greatly saves the construction investment of knowing clearly, and has improved engineering safety, has good application prospect.
The accompanying drawing explanation
Fig. 1 is connection diagram of the present invention.
Fig. 2 is the ventilating pipe connection diagram of the embodiment of the present invention 1.
Fig. 3 is the ventilating pipe connection diagram of the embodiment of the present invention 2.
Fig. 4 is the ventilating pipe connection diagram of the embodiment of the present invention 3.
Fig. 5 falls the bank stuffiness and rises bank cavitation noise spectral contrast figure in different throughput situations.
The specific embodiment
embodiment 1
The present embodiment is a kind of sudden-enlargement gallery behind high-lift lock reverse tainter gate artificial aeration method, connects as shown in Figure 1, and the high-lift lock valve adopts anti-arc door, and valve gallery sudden expansion is behind the door fallen bank and adopted notch cuttype to fall bank 1; Utilize notch cuttype to fall the first order ladder of bank 1 as the aeration groove, fall the back of the first order ladder of bank at notch cuttype and bury ventilating pipe 2 underground, ventilating pipe 2 is connected to an end of an artificial aeration pipe 3, artificial aeration pipe 3 rises to the lock top, its other end connects air collector 4 and air compressor 5 successively by tube connector, tube connector is provided with flow meter 6 and control valve 7, and artificial aeration pipe 3 is provided with pressure sensor 8; After the ventilation task starts, throughput is as required set the atmospheric pressure value of air collector 4, utilizes air compressor 5 superchargings, by ventilating pipe 2, carries out artificial aeration.Air compressor 5, for increasing air pressure, realizes falling the ventilation of Kan Chu, and the effect of air collector 4 is deposit gas, stablizes air pressure, and pressure sensor 8 is checked bottom ventilation pipe air pressure, also is furnished with control valve 7 and controls throughput.
The ventilating pipe of the present embodiment connects as shown in Figure 2, ventilating pipe comprises a row ventilate arm 9 and a vent stack 10, one row's ventilation arm 9 is embedded in the back of first order ladder, each arm 9 of ventilating is communicated to a horizontal vent stack 10, vent stack 10 two ends are positioned at the dual-side wall of first order ladder, and vent stack 10 two ends are connected to an end of artificial aeration pipe 3.The diameter of ventilation arm 9 is the 20mm left and right, interval 10～20cm, and vent stack 10 diameter is 8cm.
The first order ladder height that notch cuttype falls bank is 18cm, during the equipment operation, by the water level condition, triggered, start the ventilation task, throughput as required presets the atmospheric pressure value of air collector, utilize the air compressor supercharging, carry out artificial aeration, the value by flow meter and pressure sensor in venting process detects in real time and checks, and during work, the difference of the air pressure of air collector and pressure sensor value is no more than 0.1Mpa.
Test changes throughput by suspended body flowmeter, recording three kinds of throughputs (is converted to the value of throughput in prototype and is respectively 0.1m3/s, 0.0703 m3/s, 0.0528 m3/s) under the condition, fall the bank artificial aeration and can very effectively suppress to rise the bank cavitation, and it is very little to suppress to rise the required throughput of bank cavitation fully.Fall noise sound contrast in bank stuffiness throughput situations different from 3 kinds and see Fig. 5, as seen from the figure, when stuffiness, rise bank and exist stronger cavitation, the noise intensity pulse is large and intensive, and larger poop is arranged in the acoustic pressure waveform, after falling the bank ventilation, the noise-intensity contour substantially flat, have small-pulse effect once in a while.
The present embodiment is a kind of sudden-enlargement gallery behind high-lift lock reverse tainter gate artificial aeration method, connects as shown in Figure 1, and the high-lift lock valve adopts anti-arc door, and valve gallery sudden expansion is behind the door fallen bank and adopted notch cuttype to fall bank 1; Utilize notch cuttype to fall the first order ladder of bank 1 as the aeration groove, fall the back of the first order ladder of bank at notch cuttype and bury ventilating pipe 2 underground, ventilating pipe 2 is connected to an end of an artificial aeration pipe 3, artificial aeration pipe 3 rises to the lock top, its other end connects air collector 4 and air compressor 5 successively by tube connector, tube connector is provided with flow meter 6 and control valve 7, and artificial aeration pipe 3 is provided with pressure sensor 8; After the ventilation task starts, throughput is as required set the atmospheric pressure value of air collector 4, utilizes air compressor 5 superchargings, by ventilating pipe 2, carries out artificial aeration.Air compressor 5, for increasing air pressure, realizes falling the ventilation of Kan Chu, and the effect of air collector 4 is deposit gas, stablizes air pressure, and pressure sensor 8 is checked bottom ventilation pipe air pressure, also is furnished with control valve 7 and controls throughput.
The ventilating pipe of the present embodiment connects as shown in Figure 3, ventilating pipe is a semicircle ventilation transverse tube 11, horizontal 11 pipes of semicircle ventilation are embedded in the back of first order ladder, directly build formation after first order ladder, the baseplane of semicircle ventilation transverse tube 11 is in the face of the vertical plane of first order ladder, the baseplane steel facing of semicircle ventilation transverse tube, be equipped with air vent 12 in the steel plate equal intervals.
The first order ladder height that notch cuttype falls bank is 12cm, during the equipment operation, by the water level condition, triggered, start the ventilation task, throughput as required presets the atmospheric pressure value of air collector, utilize the air compressor supercharging, carry out artificial aeration, the value by flow meter and pressure sensor in venting process detects in real time and checks, and during work, the difference of the air pressure of air collector and pressure sensor value is no more than 0.15Mpa.
Test changes throughput by suspended body flowmeter, recording three kinds of throughputs (is converted to the value of throughput in prototype and is respectively 0.1m3/s, 0.0703 m3/s, 0.0528 m3/s) under the condition, fall the bank artificial aeration and can very effectively suppress to rise the bank cavitation, and it is very little to suppress to rise the required throughput of bank cavitation fully.Fall noise sound contrast in bank stuffiness throughput situations different from 3 kinds and see Fig. 5, as seen from the figure, when stuffiness, rise bank and exist stronger cavitation, the noise intensity pulse is large and intensive, and larger poop is arranged in the acoustic pressure waveform, after falling the bank ventilation, the noise-intensity contour substantially flat, have small-pulse effect once in a while.
The present embodiment is a kind of sudden-enlargement gallery behind high-lift lock reverse tainter gate artificial aeration method, connects as shown in Figure 1, and the high-lift lock valve adopts anti-arc door, and valve gallery sudden expansion is behind the door fallen bank and adopted notch cuttype to fall bank 1; Utilize notch cuttype to fall the first order ladder of bank 1 as the aeration groove, fall the back of the first order ladder of bank at notch cuttype and bury ventilating pipe 2 underground, ventilating pipe 2 is connected to an end of an artificial aeration pipe 3, artificial aeration pipe 3 rises to the lock top, its other end connects air collector 4 and air compressor 5 successively by tube connector, tube connector is provided with flow meter 6 and control valve 7, and artificial aeration pipe 3 is provided with pressure sensor 8; After the ventilation task starts, throughput is as required set the atmospheric pressure value of air collector 4, utilizes air compressor 5 superchargings, by ventilating pipe 2, carries out artificial aeration.Air compressor 5, for increasing air pressure, realizes falling the ventilation of Kan Chu, and the effect of air collector 4 is deposit gas, stablizes air pressure, and pressure sensor 8 is checked bottom ventilation pipe air pressure, also is furnished with control valve 7 and controls throughput.
The ventilating pipe of the present embodiment connects as shown in Figure 4, ventilating pipe is a rectangle ventilation transverse tube 13, rectangle ventilation transverse tube 13 is embedded in the back of first order ladder, directly build formation after first order ladder, a side plane of rectangle ventilation transverse tube 13 is in the face of the vertical plane of first order ladder, the side plane steel facing, be equipped with air vent 14 in the steel plate equal intervals.
The first order ladder height that notch cuttype falls bank is 22 cm, during the equipment operation, by the water level condition, triggered, start the ventilation task, throughput as required presets the atmospheric pressure value of air collector, utilize the air compressor supercharging, carry out artificial aeration, the value by flow meter and pressure sensor in venting process detects in real time and checks, and during work, the difference of the air pressure of air collector and pressure sensor value is no more than 0.2Mpa.
Test changes throughput by suspended body flowmeter, recording three kinds of throughputs (is converted to the value of throughput in prototype and is respectively 0.1m3/s, 0.0703 m3/s, 0.0528 m3/s) under the condition, fall the bank artificial aeration and can very effectively suppress to rise the bank cavitation, and it is very little to suppress to rise the required throughput of bank cavitation fully.Fall noise sound contrast in bank stuffiness throughput situations different from 3 kinds and see Fig. 5, as seen from the figure, when stuffiness, rise bank and exist stronger cavitation, the noise intensity pulse is large and intensive, and larger poop is arranged in the acoustic pressure waveform, after falling the bank ventilation, the noise-intensity contour substantially flat, have small-pulse effect once in a while.
The present invention can also have other embodiment; as long as valve version adopts anti-arc door; gallery sudden expansion behind the door; notch cuttype falls bank; and establish ventilating pipe falling Kan Chu; utilize the random and air collector artificial aeration deduction and exemption of air pressure to rise bank and fall the technical scheme of bank cavitation, or other adopts technical scheme of equal replacement or equivalent transformation formation, within all dropping on the scope of protection of present invention.
Claims (3)
1. sudden-enlargement gallery behind high-lift lock reverse tainter gate artificial aeration method, described high-lift lock valve adopts anti-arc door, and the gallery sudden expansion behind the door of described valve is fallen bank and is adopted notch cuttype to fall bank; Utilize described notch cuttype to fall the first order ladder of bank as the aeration groove, fall the back of the first order ladder of bank at described notch cuttype and bury ventilating pipe underground, described ventilating pipe is connected to an end of an artificial aeration pipe, described artificial aeration pipe rises to the lock top, its other end connects air collector and air compressor successively by tube connector, described tube connector is provided with flow meter and control valve, and described artificial aeration pipe is provided with pressure sensor; After the ventilation task starts, throughput is as required set the atmospheric pressure value of air collector, utilizes described air compressor supercharging, by described ventilating pipe, carries out artificial aeration;
It is characterized in that:
Described ventilating pipe is one of following three kinds of structures:
Described ventilating pipe comprises a row ventilate arm and a vent stack, described row's ventilation arm is embedded in the back of described first order ladder, the described arm of respectively ventilating is communicated to a horizontal described vent stack, described vent stack's two ends are positioned at the dual-side wall of described first order ladder, and described vent stack's two ends are connected to an end of described artificial aeration pipe;
Described ventilating pipe is a semicircle ventilation transverse tube, described semicircle ventilation transverse tube is embedded in the back of described first order ladder, directly build formation after first order ladder, the baseplane of described semicircle ventilation transverse tube is in the face of the vertical plane of described first order ladder, the baseplane steel facing of described semicircle ventilation transverse tube, be equipped with air vent in described steel plate equal intervals;
Described ventilating pipe is a rectangle ventilation transverse tube, described rectangle ventilation transverse tube is embedded in the back of described first order ladder, directly build formation after first order ladder, a side plane of described rectangle ventilation transverse tube is in the face of the vertical plane of described first order ladder, described side plane steel facing, be equipped with air vent in described steel plate equal intervals.
2. sudden-enlargement gallery behind high-lift lock reverse tainter gate artificial aeration method as claimed in claim 1, it is characterized in that: the first order ladder height that described notch cuttype falls bank is 18～22 cm.
3. sudden-enlargement gallery behind high-lift lock reverse tainter gate artificial aeration method as claimed in claim 1, it is characterized in that: the difference of the air pressure of described air collector and described pressure sensor value is no more than 0.1～0.2Mpa.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110214340.0A CN102286965B (en) | 2011-07-28 | 2011-07-28 | Reversed tainter valve gallery backward protruding and expanding anticavitation forced ventilation method for high-head lock |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110214340.0A CN102286965B (en) | 2011-07-28 | 2011-07-28 | Reversed tainter valve gallery backward protruding and expanding anticavitation forced ventilation method for high-head lock |
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| CN102286965A CN102286965A (en) | 2011-12-21 |
| CN102286965B true CN102286965B (en) | 2014-01-08 |
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| CN103758099B (en) * | 2014-02-11 | 2015-09-09 | 长江水利委员会长江科学院 | A kind of bottom edge aerification system of water delivery valve of high lift lock |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101302755A (en) * | 2008-03-11 | 2008-11-12 | 水利部交通部电力工业部南京水利科学研究院 | Natural aeration system capable of avoiding ship lock valve segment sudden enlarging body type ridge dropping cavitation |
| CN101603306A (en) * | 2009-07-03 | 2009-12-16 | 水利部交通部电力工业部南京水利科学研究院 | The comprehensive sudden expansion build of high-lift lock water-delivery valve section |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080038062A1 (en) * | 2006-08-14 | 2008-02-14 | Allonca Manuel G | Canal lock system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101302755A (en) * | 2008-03-11 | 2008-11-12 | 水利部交通部电力工业部南京水利科学研究院 | Natural aeration system capable of avoiding ship lock valve segment sudden enlarging body type ridge dropping cavitation |
| CN101603306A (en) * | 2009-07-03 | 2009-12-16 | 水利部交通部电力工业部南京水利科学研究院 | The comprehensive sudden expansion build of high-lift lock water-delivery valve section |
Non-Patent Citations (2)
| Title |
|---|
| 三峡永久船闸输水廊道工作门防空化措施分析;李健等;《人民长江》;20050620;第36卷(第06期);47 * |
| 李健等.三峡永久船闸输水廊道工作门防空化措施分析.《人民长江》.2005,第36卷(第06期), |
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