CN1873107A - Dissipater of hole stopper - Google Patents

Dissipater of hole stopper Download PDF

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Publication number
CN1873107A
CN1873107A CNA2006100212072A CN200610021207A CN1873107A CN 1873107 A CN1873107 A CN 1873107A CN A2006100212072 A CNA2006100212072 A CN A2006100212072A CN 200610021207 A CN200610021207 A CN 200610021207A CN 1873107 A CN1873107 A CN 1873107A
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China
Prior art keywords
hole
dissipater
hole plug
plug
stopper
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CNA2006100212072A
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CN100381642C (en
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许唯临
杨永全
王韦
刘善均
田忠
张建民
曲景学
邓军
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Sichuan University
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Sichuan University
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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

A hole blocking energy dissipater can be prepared in two types as stage hole blocking with front auxiliary hole blocking and back master hole blocking as well as with internal hole being form of staged round hole, and contraction hole blocking with internal hole being form of contraction conical holes as its front end larger than back end. It is always used with flood-discharge tunnel single pipe integrally when it is on service and service data is set as hole blocking length Lo= 0.4Do-2.1Do, hole blocking inlet diameter and outlet diameter ratio D2/ D1 =1.05-1.4, D1= 0.3Do-0.7Do with Do being hole diameter of flood-discharge tunnel.

Description

Dissipater of hole stopper
Technical field
The invention belongs to the devices for dissipation of energy that uses in the Hydraulic and Hydro-Power Engineering, there is the dissipater of hole stopper of pressing the flood discharging tunnel energy dissipating particularly a kind of being used to.
Background technology
Samuel O.Russell etc. disclose in 1967 and have a kind ofly utilized the sudden contraction sudden expansion of current to cause head loss to carry out the method for energy dissipating (referring to Samuel O.Russell, James W.Ball.Sudden-enlargement energydissipator for Mica dam.Journal of the hydraulics division ASCE, 7 (1967): 41～56), employed energy dissipater and the mounting means in flood discharging tunnel thereof such as Fig. 1～shown in Figure 4, as can be seen from the figure, the energy dissipater is a varying cross-section duct, has installed three in flood discharging tunnel.The energy dissipater of this kind structure is complex structure not only, and operating head polishing is low, and the operation flow is little, and the construction works amount is big, can not adapt to the requirement of energy dissipating in high water head, the big flow flood discharging tunnel hole.
Successful Application is to hydraulic engineering for orifice dissipater, and its energy dissipating mainly is the strong turbulent fluctuation shear zone that occurs in after the orifice plate sudden expansion, and the orifice plate sharp-edged is big because of flow velocity, and current separate, thus the easy cavitation in this position (referring to the patent No. is the Chinese patent of ZL93107799.0; The woods Xiushan Mountain, Shen Fengsheng work " Research And Engineering of multistage flood-releasing tunnel is put into practice ", Chinese Water Conservancy water power publishing house, in March, 2003, Beijing), so its anti-cavitation performance needs to improve.
The paper that the hydro science newpapers and periodicals are stepped on " Hydraulic Characteristics of hole plug flood discharging tunnel " (is seen " water conservancy journal ", the 7th phase, in July, 2002) though disclose principle and the discharge capacity of hole plug flood discharging tunnel and the theoretical calculation formula of hole plug energy dissipating relevant issues of hole plug energy dissipating, but the hole of being mentioned in literary composition plug (hereinafter being referred to as straight hole plug) is because the pressure of import department is very low, cause cavitation easily, its anti-cavitation performance haves much room for improvement.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, proposed novel dissipater of hole stopper, the not only anti-cavitation performance of this type of dissipater of hole stopper is good, and simple in structure, can effectively solve the Dissipation of Energy of big flow, high water head flood discharging tunnel.
Dissipater of hole stopper of the present invention utilizes the sudden contraction sudden expansion of current to cause bigger local head loss to carry out energy dissipating, during use and flood discharging tunnel single tube combination.In hydraulics, the energy dissipation rate available head loss coefficient ξ of hole plug represents that the Cavitation Characteristics of hole plug cavitation inception commonly used is counted σ iExpression, best hole clearance gauge is very little should to be under the prerequisite that guarantees maximum energy dissipation rate (ξ), and cavitation does not take place in the hole plug, and the cavitation number when promptly moving is greater than cavitation inception number (σ i).Because head loss coefficient ξ and cavitation inception are counted σ iClosely related with inlet diameter, the outlet diameter of hole plug, therefore, by experiment, theory analysis and method for numerical simulation carried out preferably the length L that fill in the hole to shape, inlet diameter, outlet diameter and the length of hole plug 0=0.4D 0～2.1D 0, the inlet diameter D of hole plug 2With outlet diameter D 1Ratio D 2/ D 1=1.05～1.4, D 1=0.3D 0～0.7D 0, described D in various 0Footpath, hole for flood discharging tunnel.
Dissipater of hole stopper of the present invention has following two kinds of forms:
1, step hole plug
Step hole plug is made of the auxilliary hole plug of front portion and the main hole plug at rear portion, and its endoporus is the step circular hole, the aperture D of auxilliary hole plug 2Be the inlet diameter of hole plug, the aperture D of main hole plug 1Be the outlet diameter of hole plug, D 2/ D 1=1.05～1.3, D 1=0.3D 0～0.7D 0, the length L of auxilliary hole plug 2=0.3D 0～0.6D 0, the length L of main hole plug 1=0.8D 0～1.5D 0
2, shrink the hole plug
The endoporus that shrinks the hole plug is the contraction truncated cone hole of front end greater than the rear end, the inlet diameter D of hole plug 2With outlet diameter D 1Ratio D 2/ D 1=1.05～1.4, D 1=0.3D 0～0.7D 0, the length L of hole plug 0=0.4D 0～1.0D 0
D in each parameter type of above-mentioned various dissipater of hole stopper 0Be the footpath, hole of flood discharging tunnel.
Dissipater of hole stopper concrete for making of the present invention is filled in the available high-strength anticorrosive concrete in oral area position in the hole, hole plug main part adopts conventional concrete to get final product.
In big-and-middle-sized Hydraulic and Hydro-Power Engineering, often need in flood discharging tunnel, arrange multistage hole plug, the spacing between the plug of holes at different levels is 3D 0～5D 0
The present invention has following beneficial effect:
1, anti-cavitation performance is good, test shows, orifice dissipater is 2.30 in the aperture than the cavitation inception number that is at 0.69 o'clock, straight hole plug is 4.69 in the aperture than the cavitation inception number that is at 0.65 o'clock, cavitation inception number when being 0.5 only is 2.04 and contraction of the present invention hole plug is when the outlet aperture, the cavitation inception number when being 0.53 is 2.92 when the outlet aperture for step hole plug, so anti-cavitation performance is better than prior art.
2, effect of energy dissipation is good, for example among the embodiment, the piezometric head that one-level is shunk before the plug of hole is that 519.78m (refers to elevation, down together), after three grades of contraction hole plug energy dissipatings, piezometric head is reduced to 442.13m, the head of the 77.05m that disappeared, the consideration level of tail water is 400m (referring to elevation), and then three grades of energy dissipation rate of shrinking the hole plug reach 65.3%.
3, can adapt to big flow, the high water head condition of work is 600m as the upper pond level among the embodiment, and the level of tail water is 400m, and head is 200m, and the vent flow under this water level is 2600m 3/ s, no matter head or flow are domestic maximum.
4,, and be mainly conventional concrete because manufacturing materials is a concrete, thus cheap.
5, simple in structure, be convenient to make.
6, directly at the flood discharge in-cavity construction, need not to dig on a large scale, embankment, thereby easy construction.
Description of drawings
Fig. 1 be the disclosed Canadian Mica employed energy dissipater in dam in 1967 such as Samuel O.Russell shape, structure and with the assembling schematic diagram of flood discharging tunnel;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the B-B sectional view of Fig. 1;
Fig. 4 is the C-C portion view of Fig. 1;
Fig. 5 is a kind of structure chart of step dissipater of hole stopper, and this figure has also shown the assembling mode of step dissipater of hole stopper and flood discharging tunnel;
Fig. 6 is the A-A portion view of Fig. 5;
Fig. 7 is a kind of structure chart that shrinks dissipater of hole stopper, and this figure has also shown the assembling mode that shrinks dissipater of hole stopper and flood discharging tunnel;
Fig. 8 is the A-A sectional view of Fig. 7;
Fig. 9 is a kind of equal pressure distribution map of arranging schematic diagram and flood discharging tunnel wall that uses three grades of dissipater of hole stopper in large-scale power station.
Among the figure, 1-flood discharging tunnel, 2-step dissipater of hole stopper, 3-shrink dissipater of hole stopper, 4-first order dissipater of hole stopper, 5-second level dissipater of hole stopper, 6-third level dissipater of hole stopper.
The specific embodiment
Embodiment 1
The shape of the described dissipater of hole stopper of present embodiment, structure are the step dissipater of hole stopper as Fig. 5, shown in Figure 6, are made of the auxilliary hole plug of front portion and the main hole plug at rear portion, and its endoporus is the step circular hole, the aperture D of auxilliary hole plug 2Be the inlet diameter of hole plug, the aperture D of main hole plug 1Be the outlet diameter of hole plug, D 2/ D 1=1.05～1.3, D 1=0.3D 0～0.7D 0, the length L of auxilliary hole plug 2=0.3D 0～0.6D 0, the length L of main hole plug 1=0.8D 0～1.5D 0, the D in above-mentioned each parameter type 0Footpath, hole for flood discharging tunnel 1.During specific design, can determine the length of auxilliary hole plug and main hole plug and import and export diameter according to described parameter type according to the engineering actual conditions.Dissipater of hole stopper concrete for making, import position are high-strength anticorrosive concrete, and main part is conventional concrete.
Embodiment 2
The shape of the described dissipater of hole stopper of present embodiment, structure are as Fig. 7, shown in Figure 8, and for shrinking dissipater of hole stopper, its endoporus is the contraction truncated cone hole of front end greater than the rear end, the inlet diameter D of hole plug 2With outlet diameter D 1Ratio D 2/ D 1=1.05～1.4, D 1=0.3D 0～0.7D 0, the length L of hole plug 0=0.4D 0～1.0D 0, the D in above-mentioned each parameter type 0Footpath, hole for flood discharging tunnel 1.During specific design, can determine the length of hole plug and import and export diameter according to described parameter type according to the engineering actual conditions.Dissipater of hole stopper concrete for making, import position are high-strength anticorrosive concrete, and main part is conventional concrete.
Embodiment 3
Present embodiment is the hole plug formula flood discharging tunnel that the reconstruction of diversion tunnel of certain large-scale power station becomes, footpath, the hole D of flood discharging tunnel 0Be 20m, maximal head 200m, letdown flow 2600m 3/ s has arranged three grades of dissipater of hole stopper, as shown in Figure 9.Three grades of dissipater of hole stopper are the contraction dissipater of hole stopper, and the spacing between the contraction dissipater of hole stopper at different levels is 4D 0
The first order is shunk the inlet diameter D of dissipater of hole stopper 2Be 14m, outlet diameter D 1Be 10m, the length L of hole plug 0Be 15m; The inlet diameter D of dissipater of hole stopper is shunk in the second level 2Be 14.5m, outlet diameter D 1Be 10.8m, the length L of hole plug 0Be 15m; The third level shrinks the inlet diameter D of dissipater of hole stopper 2Be 15m, outlet diameter D 1Be 11.6m, the length L of hole plug 0Be 15m.
Distribution from Fig. 9 pressure along the hole wall as can be seen, through three grades of energy dissipatings, pressure is less before flood discharge hole outlet.The decompression experiment shows that cavitation does not all take place holes at different levels plug.

Claims (3)

1, dissipater of hole stopper is characterized in that the length L that fill in the hole 0=0.4 D 0～2.1D 0, the inlet diameter D of hole plug 2With outlet diameter D 1Ratio D 2/ D 1=1.05～1.4, D 1=0.3 D 0～0.7D 0, described D in various 0Footpath, hole for flood discharging tunnel.
2, dissipater of hole stopper according to claim 1 is characterized in that the hole plug is made of the auxilliary hole plug of front portion and the main hole plug at rear portion, and its endoporus is the step circular hole, the aperture D of auxilliary hole plug 2Be the inlet diameter of hole plug, the aperture D of main hole plug 1Be the outlet diameter of hole plug, D 2/ D 1=1.05～1.3, D 1=0.3 D 0～0.7D 0, the length L of auxilliary hole plug 2=0.3D 0～0.6D 0, the length L of main hole plug 1=0.8 D 0～1.5D 0, described D in various 0Footpath, hole for flood discharging tunnel.
3, dissipater of hole stopper according to claim 1 is characterized in that the endoporus of hole plug is the contraction truncated cone hole of front end greater than the rear end, the inlet diameter D of hole plug 2With outlet diameter D 1Ratio D 2/ D 1=1.05～1.4, D 1=0.3D 0～0.7D 0, the length L of hole plug 0=0.4 D 0～1.0D 0, described D in various 0Footpath, hole for flood discharging tunnel.
CNB2006100212072A 2006-06-20 2006-06-20 Dissipater of hole stopper Expired - Fee Related CN100381642C (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101851910A (en) * 2010-05-26 2010-10-06 四川大学 Water guide board arranged on outlet of pressure drainage channel
CN101871204A (en) * 2010-06-28 2010-10-27 四川大学 Capping method for planar curve path of free-flow spillway tunnel
CN102322047A (en) * 2011-08-05 2012-01-18 四川大学 Broken line inlet type hole plug energy dissipater
CN102409642A (en) * 2011-09-10 2012-04-11 四川大学 Reducing and sudden expansion type inner energy dissipator
CN102518091A (en) * 2012-01-11 2012-06-27 黄河勘测规划设计有限公司 Arrangement and construction method of energy dissipation orifices in flood discharging tunnel
CN102787588A (en) * 2012-08-16 2012-11-21 华北水利水电学院 Shaft with vertical eddy-flow energy dissipaters of hole stoppers
CN103993586A (en) * 2014-05-26 2014-08-20 中国电建集团成都勘测设计研究院有限公司 Hydraulic tunnel structure and opening method thereof
CN109295938A (en) * 2018-10-26 2019-02-01 杨凌职业技术学院 A kind of flood discharging tunnel energy dissipating corrosion inhibitor structure
CN110080182A (en) * 2019-05-30 2019-08-02 长江勘测规划设计研究有限责任公司 Fill in energy-dissipating structure and its method for arranging in diversion tunnel hole
CN110616689A (en) * 2019-09-02 2019-12-27 四川大学 Anti-corrosion inner flow orifice plate energy dissipater

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1060834C (en) * 1996-01-24 2001-01-17 沈阳农业大学 Soft-base low-weir spillway dam energy-dissipation structure
JP3676291B2 (en) * 2001-07-23 2005-07-27 積水化学工業株式会社 Destructor

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101851910B (en) * 2010-05-26 2013-01-23 四川大学 Water guide board arranged on outlet of pressure drainage channel
CN101851910A (en) * 2010-05-26 2010-10-06 四川大学 Water guide board arranged on outlet of pressure drainage channel
CN101871204A (en) * 2010-06-28 2010-10-27 四川大学 Capping method for planar curve path of free-flow spillway tunnel
CN101871204B (en) * 2010-06-28 2012-08-15 四川大学 Capping method for planar curve path of free-flow spillway tunnel
CN102322047A (en) * 2011-08-05 2012-01-18 四川大学 Broken line inlet type hole plug energy dissipater
CN102409642A (en) * 2011-09-10 2012-04-11 四川大学 Reducing and sudden expansion type inner energy dissipator
CN102518091A (en) * 2012-01-11 2012-06-27 黄河勘测规划设计有限公司 Arrangement and construction method of energy dissipation orifices in flood discharging tunnel
CN102787588A (en) * 2012-08-16 2012-11-21 华北水利水电学院 Shaft with vertical eddy-flow energy dissipaters of hole stoppers
CN103993586A (en) * 2014-05-26 2014-08-20 中国电建集团成都勘测设计研究院有限公司 Hydraulic tunnel structure and opening method thereof
CN109295938A (en) * 2018-10-26 2019-02-01 杨凌职业技术学院 A kind of flood discharging tunnel energy dissipating corrosion inhibitor structure
CN110080182A (en) * 2019-05-30 2019-08-02 长江勘测规划设计研究有限责任公司 Fill in energy-dissipating structure and its method for arranging in diversion tunnel hole
CN110080182B (en) * 2019-05-30 2023-12-05 长江勘测规划设计研究有限责任公司 Diversion tunnel plug energy dissipation structure and arrangement method thereof
CN110616689A (en) * 2019-09-02 2019-12-27 四川大学 Anti-corrosion inner flow orifice plate energy dissipater
CN110616689B (en) * 2019-09-02 2021-04-27 四川大学 Anti-corrosion inner flow orifice plate energy dissipater

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