CN102912772A - Discharge chute - Google Patents

Discharge chute Download PDF

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Publication number
CN102912772A
CN102912772A CN2012104772064A CN201210477206A CN102912772A CN 102912772 A CN102912772 A CN 102912772A CN 2012104772064 A CN2012104772064 A CN 2012104772064A CN 201210477206 A CN201210477206 A CN 201210477206A CN 102912772 A CN102912772 A CN 102912772A
Authority
CN
China
Prior art keywords
groove
base plate
smooth
prominent
letting out
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.)
Granted
Application number
CN2012104772064A
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Chinese (zh)
Other versions
CN102912772B (en
Inventor
王立杰
戴晓兵
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Hydrochina Zhongnan Engineering Corp
Original Assignee
Hydrochina Zhongnan Engineering Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hydrochina Zhongnan Engineering Corp filed Critical Hydrochina Zhongnan Engineering Corp
Priority to CN201210477206.4A priority Critical patent/CN102912772B/en
Publication of CN102912772A publication Critical patent/CN102912772A/en
Application granted granted Critical
Publication of CN102912772B publication Critical patent/CN102912772B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention discloses a discharge chute which comprises a bottom plate and side walls at two sides of the bottom plate, wherein the bottom plate comprises a plurality of stepped bottom plates and a plurality of smooth bottom plates; the stepped bottom plates and the smooth bottom plates are alternately arranged; and a plurality of convex bodies are arranged on the smooth bottom plates and/or the side walls. According to the discharge chute, the convex bodies are arranged on the smooth bottom plates and/or the side walls, so that the roughness of the discharge chute is improved, the frictional resistance is increased, the turbulent energy dissipation rate is improved, a mass of water flow energy is dissipated, the risks of the cavitation erosion destroy of the discharge chute and the erosion destroy are reduced and the flood discharge safety is improved.

Description

A kind of groove of letting out
Technical field
The present invention relates to the Hydraulic and Hydro-Power Engineering outlet structure escape works and let out groove, particularly a kind of ladder that becomes the high roughness of the gradient is let out groove.
Background technology
For the Hydraulic and Hydro-Power Engineering outlet structure escape works, letting out groove is the passage of confinement of flow, guiding current.At present, base plate, the side wall of letting out groove adopt smooth continuous smooth-going pattern more, ideally, the smooth-going groove of letting out has preferably adaptive capacity to high-velocity flow under the cooperation of air mixing corrosion reducing facility, can guide preferably under the current and let out, and reduce or remit self cavitation erosion and erosion attack, but in the reality, because flow velocity is high, the smooth-going groove of letting out still has and is subject to cavitation erosion and erosion attack example.In the situation less at the flow rate of water flow of letting out groove, that discharge per unit width is little, let out groove and can adopt the ladder pattern, ladder is let out groove can be along the journey energy of current stopped that disappears under the effect of ladder, reduce the lower stream flow velocity that sluices, be conducive to the linking of downstream river course current, ladder is let out groove easily by the high-velocity flow erosion attack, lets out the groove flow rate of water flow and need to control within the specific limits.
Summary of the invention
Technical problem to be solved by this invention is, and is not enough for prior art, and a kind of groove of letting out is provided, and reduces the risk of letting out groove self cavitation erosion and erosion attack, reduces the anti-stamping press of the energy dissipating of letting out the groove downstream, improves the flood discharge safety.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of groove of letting out, the side wall that comprises base plate and base plate both sides, described base plate comprises some sections step boards and some sections smooth-going base plates, step board and smooth-going base plate interval layout, described smooth-going base plate and/or side wall are provided with several prominent bodies.
As preferred version, described prominent body interlaced arrangement.
Described prominent body is hemispherical or streamlined, and the height of prominent body is 0.5m~2.0m.
The described step board gradient is 5~60 0
As preferred version, also comprise the air mixing corrosion reducing facility, described air mixing corrosion reducing facility is connected with the base plate upstream extremity.
Compared with prior art, the beneficial effect that the present invention has is: the present invention is by arranging prominent body at chute bottom slab and/or side wall, improve the roughness of letting out groove, increase frictional resistance, improved disorderly kinetic energy dissipation rate, a large amount of flow energy that dissipates has reduced the risk of letting out groove self cavitation erosion and erosion attack, reduce the anti-stamping press of the energy dissipating of letting out the groove downstream, improved the flood discharge safety.
Description of drawings
Fig. 1 is one embodiment of the invention front view;
Fig. 2 is one embodiment of the invention longitudinal sectional view;
Fig. 3 is one embodiment of the invention transverse sectional view.
The specific embodiment
As shown in Figure 1-Figure 3, one embodiment of the invention comprises the side wall 3 of base plate 2 and base plate both sides, described base plate 2 comprises some sections step boards 5 and some sections smooth-going base plates 6, step board 5 and smooth-going base plate 6 intervals layout, and smooth-going base plate 6 and/or side wall 3 are provided with several prominent bodies 1; Prominent body 1 is hemispherical or streamlined, and the height of prominent body 1 is 0.5m~2.0m, prominent body 1 interlaced arrangement; Step board 5 gradients are 5~60 0Air mixing corrosion reducing facility 4 is connected with base plate 2 upstream extremities.
The size of prominent body 1 should be definite according to letting out the groove hydraulics, and when adopting the prominent body of hemispherical, the ratio of hemispherical height and end circular diameter can be controlled between 1:2~1:8; Vertical or horizontal spacing between the prominent body 1 can be controlled at the bottom of 2~8 times of hemisphericals between the circular diameter, and to obtain maximum roughness value, the roughness value can be controlled between 0.04~0.12; Prominent body can adopt prefabricated units, and the reserved steel bar joint, during construction it is lifted to the installation site, and reserved steel bar is connected with peripheral reinforcing bar, and then the groove concrete is let out in cast.
At chute bottom slab and side wall prominent body is set, can improve the roughness of letting out groove, increase frictional resistance, current are under the effect of prominent body, flow to sharply change, prominent body downstream forms the shearing energy dissipating whirlpool body of various yardsticks, and the inner turbulence intensity of water body obviously increases, improved disorderly kinetic energy dissipation rate, a large amount of flow energy dissipates.Current form at step board and shear energy dissipating whirlpool body, can increase substantially along the journey energy dissipation rate, because base plate is fold-line-shaped, and current are attached on the chute bottom slab, the water surface rises and falls simultaneously, and current gradient increases, and operation length increases, and the more flow energy of stopping disappears.

Claims (6)

1. let out groove for one kind, comprise the side wall of base plate and base plate both sides, it is characterized in that, described base plate comprises some sections step boards and some sections smooth-going base plates, step board and smooth-going base plate interval layout, and described smooth-going base plate and/or side wall are provided with several prominent bodies.
2. the groove of letting out according to claim 1 is characterized in that, described prominent body interlaced arrangement.
3. the groove of letting out according to claim 1 and 2 is characterized in that, described prominent body is hemispherical or streamlined, and the height of prominent body is 0.5m~2.0m.
4. the groove of letting out according to claim 3 is characterized in that, the prominent height of described hemispherical is 1:2~1:8 with the ratio of circular diameter at the bottom of the hemispherical, and the prominent vertical or horizontal spacing of body of hemispherical is 2~8 times of circular diameters at the bottom of the hemispherical.
5. the groove of letting out according to claim 1 is characterized in that, the described step board gradient is 5~60 0
6. the groove of letting out according to claim 1 is characterized in that, also comprises the air mixing corrosion reducing facility, and described air mixing corrosion reducing facility is connected with the base plate upstream extremity.
CN201210477206.4A 2012-11-22 2012-11-22 Discharge chute Active CN102912772B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210477206.4A CN102912772B (en) 2012-11-22 2012-11-22 Discharge chute

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210477206.4A CN102912772B (en) 2012-11-22 2012-11-22 Discharge chute

Publications (2)

Publication Number Publication Date
CN102912772A true CN102912772A (en) 2013-02-06
CN102912772B CN102912772B (en) 2015-05-13

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Family Applications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103437332A (en) * 2013-09-05 2013-12-11 中国水电顾问集团中南勘测设计研究院 Protruding body and discharge chute for mounting protruding body
CN103774625A (en) * 2014-01-22 2014-05-07 河海大学 Tool ridge type narrow seam energy dissipater and energy dissipation method
CN108560477A (en) * 2018-02-07 2018-09-21 四川大学 It is a kind of using calcium carbide as the novel air entraining facilities and method of gas source

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101195999A (en) * 2007-10-30 2008-06-11 四川大学 Ladder energy dissipater with doped gas device preposed
CN101349048A (en) * 2008-09-04 2009-01-21 四川大学 Full section ladder energy dissipater
CN101368380A (en) * 2008-10-10 2009-02-18 四川大学 Roughening and energy dissipating method for flood discharging groove
CN102677640A (en) * 2012-05-25 2012-09-19 四川大学 Step energy dissipater comprising reverse arc surfaces
CN202925532U (en) * 2012-11-22 2013-05-08 中国水电顾问集团中南勘测设计研究院 Discharging groove

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1033627A1 (en) * 1982-02-22 1983-08-07 Туркменский научно-исследовательский институт гидротехники и мелиорации Mud stream protecting structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101195999A (en) * 2007-10-30 2008-06-11 四川大学 Ladder energy dissipater with doped gas device preposed
CN101349048A (en) * 2008-09-04 2009-01-21 四川大学 Full section ladder energy dissipater
CN101368380A (en) * 2008-10-10 2009-02-18 四川大学 Roughening and energy dissipating method for flood discharging groove
CN102677640A (en) * 2012-05-25 2012-09-19 四川大学 Step energy dissipater comprising reverse arc surfaces
CN202925532U (en) * 2012-11-22 2013-05-08 中国水电顾问集团中南勘测设计研究院 Discharging groove

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103437332A (en) * 2013-09-05 2013-12-11 中国水电顾问集团中南勘测设计研究院 Protruding body and discharge chute for mounting protruding body
CN103774625A (en) * 2014-01-22 2014-05-07 河海大学 Tool ridge type narrow seam energy dissipater and energy dissipation method
CN103774625B (en) * 2014-01-22 2015-11-18 河海大学 Tooth bank formula slit-type energy dissipation and energy dissipating method
CN108560477A (en) * 2018-02-07 2018-09-21 四川大学 It is a kind of using calcium carbide as the novel air entraining facilities and method of gas source

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Address after: 410014 Hunan province Changsha Yuhua District, camphor Road No. 16

Applicant after: Company limited of Central-South survey and design research institute of electricity Jian group of China

Address before: 410014, 9 camphor Road, Yuhua District, Hunan, Changsha

Applicant before: Zhongnan Prospecting Design Inst. China Hydrauelectric Consultant Group

COR Change of bibliographic data

Free format text: CORRECT: APPLICANT; FROM: ZHONGNAN PROSPECTING DESIGN INST. CHINA HYDRAUELECTRIC CONSULTANT GROUP TO: CHINA POWER GROUP ZHONGNAN INVESTIGATION DESIGN + RESEARCH INSTITUTE CO., LTD.

C14 Grant of patent or utility model
GR01 Patent grant