CN100392191C - Anti-oscillation water transport structure - Google Patents
Anti-oscillation water transport structure Download PDFInfo
- Publication number
- CN100392191C CN100392191C CNB2006100133494A CN200610013349A CN100392191C CN 100392191 C CN100392191 C CN 100392191C CN B2006100133494 A CNB2006100133494 A CN B2006100133494A CN 200610013349 A CN200610013349 A CN 200610013349A CN 100392191 C CN100392191 C CN 100392191C
- Authority
- CN
- China
- Prior art keywords
- water
- water delivery
- delivery unit
- surge tank
- oscillation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Pipe Accessories (AREA)
- Pipeline Systems (AREA)
Abstract
The present invention relates to an oscillation prevention water transport structure which solves the problems of the existing segment low pressure water transport system of water power oscillation and incapability of stabilization for a long time. The present invention is composed of N groups of water transport units, wherein each water transport unit comprises a water holding weir well and a pressure conduit. The ratio omega of inherent water power oscillation frequency between two adjacent water transport units meets the requirement that omega' < =0.7 or omega' >=1.4. A surge tank is arranged above the pressure conduits arranged on lower reaches of the water holding weir well, and intercommunicating pores are arranged among the surge tanks and an inspection well. The present invention reserves the advantages of the structure of the segment low pressure water transport system, and simultaneously, the frequency of the adjacent units are staggered through reasonable selection of the parameters of the inherent water power oscillation frequency of the water transport units, so the water power oscillation in the water power transition process is effectively reduced, the enlargement and the propagation of the water power oscillation to the lower reaches are controlled, and the occurrence of resonance is avoided. The arrangement of the surge tank after the inspection well with violent water power oscillation under the condition of the staggered inherent frequency of the adjacent water transport units in the inspection time effectively reduces the violent oscillation of the well inspection, avoids the burst, and realizes safe and stable water transport of the whole system.
Description
[technical field]:
The invention belongs to the architecture structure form in the large-scale long distance water transfer field.
[background technology]:
Quickening along with The development in society and economy, Increase of population and city process, people are more and more to the demand of water resource, water resource spatial and temporal distributions inequality in addition, make different regions especially the problem of shortage of water resources all occur in some large-and-medium size cities, seriously restricting The development in society and economy.And build large-scale long distance water transfer project is to regulate water resource spatial and temporal distributions inequality, solves effective, the most direct means of water resource imbalance between supply and demand.
Water delivery engineering mainly adopted does not in the past have the form of pressing or the pressure water delivery being arranged, but it is slow for the operation conditioned reaction not have the water delivery of pressure, and open type does not have and presses water delivery also to exist water quality to be difficult to ensure, the evaporation leakage loss is big, deficiencies such as ice age water delivery difficulty, there is the water delivery of pressure then not have above-mentioned shortcoming, but traditional integral body has the waterpower control of pressing water delivery comparatively complicated, occurring pipeline easily when adopting head end control comes to nothing, produce unfavorable phenomenons such as negative pressure, when adopting afterbody control, there are behind the excessive and lock of surge pressure problems such as energy dissipating again, so guarantee safety, it is bigger to stablize the water delivery difficulty.The segmentation low-pressure water delivery is a kind of novel pressure water-carriage mode that has, it is that the integral pressure water delivery line is divided into relatively independent pressurized water transmission unit, connect by water conservation weir well between the water delivery unit, no matter be under normal operation or hydrostatic state, water-carriage system can both satisfy the requirement of automatic water conservation, makes circuit be in pressure state.Only need the head end flow is controlled, the level pressure of system will reach rational state automatically, under the situation of low discharge, stepped low pressurized water diversion system reduces head by segmentation makes that the pressure distribution of waterline is more reasonable than integral pressure hydraulic pipeline, the pressure head that pipeline bears is corresponding to be reduced, and can simplify like this has the controlled condition of pressing water delivery, reduces the water delivery line cost, improve the safety of pressure conduit, so this water delivery form has obtained application more and more widely.Though there is above advantage in stepped low pressurized water diversion system, but it has the characteristic properties of hydraulic oscillation, the hydraulic oscillation of regulating key elements such as the water level along the line of system in the waterpower transient process caused, flow at normal discharge has the trend of propagates down stream even aggravation and presents obvious periodic, and can't stablize for a long time, this hydraulic oscillation is particularly evident the performance of the table place on water conservation weir, the downstream of water delivery unit, is unfavorable for safety, the stable operation of water-carriage system.
[summary of the invention]:
The objective of the invention is to solve existing stepped low pressurized water diversion system and have hydraulic oscillation, and can't stablize for a long time, be unfavorable for the safety of water-carriage system, the problem of stable operation, a kind of anti-oscillation water transport structure is provided, make it when normal operation, can effectively reduce the hydraulic oscillation in the waterpower transient process and control its expansion propagation downstream, can effectively reduce the thermal agitation of inspection-pit during maintenance, prevent to come to nothing, realize system-wide safe, stablize water delivery.
Anti-oscillation water transport structure provided by the invention, constitute by N group water delivery unit, every group of water delivery unit comprises that by M the identical water delivery unit of water conservation weir well, pressure pipeline is formed in parallel, water delivery unit in parallel does not only have pressure reduction at water conservation weir Jing Chu and is communicated with, wherein N, M are positive integer, intrinsic hydraulic oscillation frequency ratio ω ' between the two adjacent groups water delivery unit satisfies ω '≤0.7 or ω ' 〉=1.4, and the intrinsic hydraulic oscillation frequency of each water delivery unit satisfies formula:
Wherein:
A is a water delivery unit pressure conduit basal area, and g is an acceleration of gravity, and F is upstream, a water delivery unit table area, and L is the water delivery element length.
Swim side next-door neighbour in down-hole, water conservation weir and be provided with inspection-pit, inspection-pit links to each other by Emergency Gate with water conservation weir well after-bay, be provided with surge tank on the pressure pipeline of down-hole, water conservation weir trip, the base plate of surge tank is the top board of pressure pipeline, be provided with intercommunicating pore and be communicated with gate between surge tank and the inspection-pit, each inspection-pit is not communicated with.Surge tank integral body is box-shaped, with water delivery cell pressure pipeline with wide, the surge tank on each water delivery cell pressure pipeline in parallel does not have pressure reduction and is communicated with.
Advantage of the present invention and good effect: the present invention is when keeping the stepped low pressurized water diversion system structural advantages, intrinsic frequency parameter by rational selection water delivery unit, the intrinsic frequency of adjacent cells is staggered, can effectively reduce the hydraulic oscillation in the waterpower transient process and control its expansion propagation downstream, avoid the generation of resonating, the thermal agitation that surge tank can effectively reduce inspection-pit is set considering under the condition that adjacent water delivery unit intrinsic frequency staggers behind the violent inspection-pit of hydraulic vibration during maintenance, prevent to come to nothing, realize system-wide safety, stablize water delivery.
[description of drawings]:
Fig. 1 is the whole generalization schematic diagram of anti-oscillation water transport structure of the present invention;
Fig. 2 is for being provided with total generalized section of the water conservation weir well of surge tank among the present invention;
Fig. 3 is for being provided with the floor map (three hole parallel forms) of the water conservation weir well of surge tank among the present invention.
Among the figure, 1 is water conservation weir well, and 2 is surge tank, 3 are the water delivery pressure pipeline, and 4 are the maintenance lock, and 5 is inspection-pit, 6 is the water conservation weir, 7 is the intercommunicating pore of surge tank and inspection-pit, and 8 is the intercommunicating pore between surge tank in parallel, and 9 is water conservation weir well intercommunicating pore, A is the pressure pipeline basal area, B is the table area of inspection-pit, and C is the table area of surge tank, D
1Table area when being well stream for water conservation weir well, D
2Table area when being weir flow for water conservation weir well, L are the water delivery element length.Wherein B, C, D
1(D
2) the area sum be the table area F of upstream, water delivery unit.
[specific embodiment]:
An anti-oscillation water transport structure as Figure 1-3, it is made up of pressure pipeline 3 of parallel connection and the water conservation weir well 1 that is communicated with, wherein N=5, M=3, i.e. totally 5 groups of water delivery unit, every group is 3.Find that after deliberation phenomenon that stepped low pressurized water diversion system hydraulic oscillation propagates down stream aggravates gradually just because of due to the current resonance, must stagger the intrinsic frequency of adjacent water delivery unit and just can avoid resonance this moment.After deliberation as can be known the intrinsic hydraulic oscillation frequency of water delivery unit with water delivery element length L, water delivery pressure pipeline cross-sectional area A, table area F is relevant for the upstream, unit.The water delivery unit that is provided with surge tank is by water conservation weir well 1, surge tank 2, pressure pipeline 3 constitutes, the table area F of upstream, water delivery unit has increased the table area of surge tank, the table area F that is the upstream, unit is a water conservation weir well, inspection-pit, surge tank table area sum (normal operation) or inspection-pit and surge tank table area sum (maintenance situation), consider the practicality and the operability of engineering design, for selecting rational intrinsic frequency parameter in each water delivery unit of water-carriage system, the corresponding intrinsic frequency parameter value in each water delivery unit is as shown in the table, then the intrinsic hydraulic oscillation frequency that draws five water delivery unit is respectively 0.0060,0.0083,0.0046,0.0066,0.0099, thereby make the intrinsic hydraulic oscillation frequency of adjacent cells stagger, prevent hydraulic oscillation expansion propagation downstream, avoid the generation of current resonance.
Need close the maintenance lock 4 of this unit head end when the 4th water delivery unit of maintenance water-carriage system, at this moment hydraulic oscillation to occur violent for inspection-pit 5, the stable problem that waits slowly of hydraulic elements.As Fig. 2, shown in Figure 3, surge tank 2 should be set behind this inspection-pit, head end water conservation weir, Unit the 4th well length overall 26m, the long 10m in forebay, weir, the long 16m of weir after-bay, surge tank is long to be 12m, surge tank and water delivery pressure pipeline are communicated with by intercommunicating pore 8 no pressure reduction between the surge tank in parallel with wide, are not communicated with between each inspection-pit, intercommunicating pore 7 between surge tank and the inspection-pit is got 1.2m, to guarantee that no pressure reduction is communicated with between surge tank and the inspection-pit.Three gates that surge tank is communicated with inspection-pit when normal operation all are opening, when carrying out the barrier gate inspection operation, close the pairing connection gate of non-service conduits, can utilize the gross area that is communicated with cabinet to slow down vibration, promptly be equivalent to increase the table area at inspection-pit place, thereby effectively reduce the frequency of oscillation and the amplitude of inspection-pit table, and shorten the time of its fluctuation.
The corresponding intrinsic hydraulic oscillation frequency parameter value in each water delivery unit
| |
|
|
Water delivery unit 4 | |
|
| Water delivery element length L (m) | 10016 | 9560 | 18404 | 15727 | 8560 |
| Pressure pipeline basal area A (m 2) | 7.06 | 7.06 | 7.06 | 7.06 | 7.06 |
| Upstream, unit table area F (m 2) | 192.1 | 105.2 | 177.8 | 101.1 | 82.6 |
Claims (3)
1. anti-oscillation water transport structure, constitute by N group water delivery unit, every group of water delivery unit comprises that by M the identical water delivery unit of water conservation weir well, pressure pipeline is formed in parallel, water delivery unit in parallel does not only have pressure reduction at water conservation weir Jing Chu and is communicated with, wherein N, M are positive integer, it is characterized in that the intrinsic hydraulic oscillation frequency ratio ω ' between the two adjacent groups water delivery unit satisfies ω '≤0.7 or ω ' 〉=1.4, the intrinsic hydraulic oscillation frequency of each water delivery unit satisfies formula:
Wherein:
A is a water delivery unit pressure conduit basal area, and g is an acceleration of gravity, and F is upstream, a water delivery unit table area, and L is the water delivery element length.
2. anti-oscillation water transport structure according to claim 1, it is characterized in that swimming side next-door neighbour in down-hole, water conservation weir is provided with inspection-pit, inspection-pit links to each other by Emergency Gate with water conservation weir well after-bay, be provided with surge tank on the pressure pipeline of down-hole, water conservation weir trip, the base plate of surge tank is the top board of pressure pipeline, is provided with intercommunicating pore and is communicated with gate between surge tank and the inspection-pit.
3. anti-oscillation water transport structure according to claim 2 is characterized in that surge tank is whole and is box-shaped, with water delivery cell pressure pipeline with wide, the surge tank on each water delivery cell pressure pipeline in parallel does not have pressure reduction and is communicated with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100133494A CN100392191C (en) | 2006-03-22 | 2006-03-22 | Anti-oscillation water transport structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100133494A CN100392191C (en) | 2006-03-22 | 2006-03-22 | Anti-oscillation water transport structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1821495A CN1821495A (en) | 2006-08-23 |
| CN100392191C true CN100392191C (en) | 2008-06-04 |
Family
ID=36923050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100133494A Expired - Fee Related CN100392191C (en) | 2006-03-22 | 2006-03-22 | Anti-oscillation water transport structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100392191C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672024B (en) * | 2009-10-12 | 2011-07-20 | 天津市水利勘测设计院 | Gravity pressure water delivery system with automatic-adjusting weir well |
| CN101907227B (en) * | 2010-07-09 | 2012-10-10 | 辽宁省水利水电勘测设计研究院 | Overflow type pressure-stabilizing tower in water conveying system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001214899A (en) * | 2000-02-03 | 2001-08-10 | Ebara Corp | Vibration reducing device of pump plant |
| JP2003221846A (en) * | 2002-01-30 | 2003-08-08 | Ebara Corp | Large-scale pump station |
-
2006
- 2006-03-22 CN CNB2006100133494A patent/CN100392191C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001214899A (en) * | 2000-02-03 | 2001-08-10 | Ebara Corp | Vibration reducing device of pump plant |
| JP2003221846A (en) * | 2002-01-30 | 2003-08-08 | Ebara Corp | Large-scale pump station |
Non-Patent Citations (4)
| Title |
|---|
| 分段低压输水管系的水力振荡特性. 万五一，练继建，崔广涛.水力学报，第12期. 2003 |
| 分段低压输水管系的水力振荡特性. 万五一，练继建，崔广涛.水力学报，第12期. 2003 * |
| 长距离分段低压输水的水力特性. 练继建，万五一，王云仓.水利水电技术，第32卷第12期. 2001 |
| 长距离分段低压输水的水力特性. 练继建，万五一，王云仓.水利水电技术，第32卷第12期. 2001 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1821495A (en) | 2006-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208706769U (en) | A kind of fuel battery gas diffusion layer and fuel cell | |
| CN103413956A (en) | Proton exchange membrane fuel cell channel | |
| CN101800317A (en) | Proton exchange membrane fuel cell bipolar plate with gas flow field | |
| CN100392191C (en) | Anti-oscillation water transport structure | |
| CN206602480U (en) | Aisle floating body bridging support component formula water surface photovoltaic generating system | |
| CN201655893U (en) | Bipolar plate of proton-exchange membrane fuel cell with gas flow field | |
| CN201892447U (en) | Automatic water replenishing forced cooler for machine oil production system | |
| CN201028754Y (en) | Water heater with water feeding buffering mechanism | |
| CN204644955U (en) | A kind of water conservancy diversion, energy-dissipating structure being applicable to tidal waterway water drainage hinge | |
| CN102938467A (en) | Fuel cell positive pole system | |
| CN210212701U (en) | Floating body, photovoltaic panel supporting mechanism and water floating type photovoltaic power station | |
| CN101168968B (en) | Multi-cavity bearing type heat-storing water tank | |
| CN204000796U (en) | Power station in river channel's structure | |
| CN205014527U (en) | Water cold -storage stationary flow water -locator | |
| CN202643379U (en) | Concentrated water recycling system of reverse osmosis water making device | |
| CN201217797Y (en) | Ship lock with electric generating apparatus | |
| CN217464097U (en) | Rectangular water distributor and energy storage device | |
| CN207327565U (en) | A kind of novel cable sheath cooling device | |
| CN220953283U (en) | High-low bank structure for diversion ecological flow of tail water of power station | |
| CN219491150U (en) | Water intaking structure suitable for spillway hole export | |
| CN219490882U (en) | Can realize secondary energy dissipation's stilling pool structure | |
| CN217763597U (en) | Distributed three-stage pump heat supply transmission and distribution system | |
| CN202644942U (en) | Multilevel jet flow vent valve | |
| CN220666422U (en) | Municipal rainwater energy dissipation inspection shaft | |
| CN220287551U (en) | Heating system for municipal administration main pipe network backwater and multi-energy coupling utilization |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080604 |