CN204676501U - A kind of air entraining facilities of flood discharging tunnel - Google Patents
A kind of air entraining facilities of flood discharging tunnel Download PDFInfo
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- CN204676501U CN204676501U CN201520251098.8U CN201520251098U CN204676501U CN 204676501 U CN204676501 U CN 204676501U CN 201520251098 U CN201520251098 U CN 201520251098U CN 204676501 U CN204676501 U CN 204676501U
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Abstract
The utility model relates to a kind of air entraining facilities of flood discharging tunnel.The purpose of this utility model is to provide a kind of air entraining facilities of safe and reliable, simple flood discharging tunnel of constructing, and avoids directly contacting with high-velocity flow section gas-vapor mix, can provide enough air to greatest extent, ensures ventilatory effect and good bubble distribution state.The technical solution of the utility model is: a kind of air entraining facilities of flood discharging tunnel, comprise the flood discharging tunnel being provided with air mixing corrosion reducing facility, it is concrete base plate bottom flood discharging tunnel, both sides are concrete-lined hole wall, vertical independent ventilation hole is arranged in the wall of described hole, stable aerated cavity is formed bottom air vent and between base plate, it is characterized in that: described flood discharging tunnel section is gateway opening shape, with flood discharging tunnel section center line for axis is provided with the air shaft be communicated with ambient atmosphere, described air vent upper end is connected with arc transition with between air shaft lower end.The utility model is applicable to the civil engineering such as water conservancy, water power.
Description
Technical field
The utility model relates to a kind of air entraining facilities of flood discharging tunnel, is applicable to the civil engineering such as water conservancy, water power.
Background technology
Large-scale flood discharging tunnel is for preventing cavitation destruction, and the place being usually greater than 30m/s ~ 35m/s at flow velocity adds air mixing corrosion reducing facility along current limit wall, and this layout is the engineer applied such as water conservancy, water power form of structure widely.As higher in certain engineering flood discharging tunnel dragon rear flow rate of water flow that falls, Peak Flow Rate is at about 45m/s, flow cavitation number is between 0.16 ~ 0.24, the position that these flow cavitation numbers are smaller, likely there is cavitation destruction, comparatively large on the safe operation impact of flood discharging tunnel, need to take effective, economic, reliable anti-cavitation cavitation corrosion measure, this is engineering problem commonplace in the civil engineering such as water conservancy, water power flood discharging tunnel.
At present; all generally bottom water layer after facility to the layout pattern of air mixing corrosion reducing facility in flood discharging tunnel or sidewall forms the stable cavity of certain length; utilize the negative pressure formed in cavity; by the air vent connected; outside air is sucked automatically, and with current blending after move down to reach the effect protecting hole wall thereupon.As shown in Figure 1, the traditional air vent of flood discharging tunnel aerator is generally arranged in Dong Bi both sides, utilize local to dig supplies gas from hole top connection, but because high-velocity flow section hole static headspace gas may be full of gas-vapor mix, from hole top tonifying Qi by often not reaching necessary aeration concentrater (generally minimum not should lower than 4% ~ 5%), affect the ventilatory effect of air entraining facilities.
Summary of the invention
The technical problems to be solved in the utility model is: for above-mentioned Problems existing, a kind of air entraining facilities of safe and reliable, simple flood discharging tunnel of constructing is provided, avoid directly contacting with high-velocity flow section gas-vapor mix, enough air can be provided to greatest extent, ensure ventilatory effect and good bubble distribution state.
The technical scheme that the utility model adopts is: a kind of air entraining facilities of flood discharging tunnel, comprise the flood discharging tunnel being provided with air mixing corrosion reducing facility, it is concrete base plate bottom flood discharging tunnel, both sides are concrete-lined hole wall, vertical independent ventilation hole is arranged in the wall of described hole, stable aerated cavity is formed bottom air vent and between base plate, it is characterized in that: described flood discharging tunnel section is gateway opening shape, with flood discharging tunnel section center line for axis is provided with the air shaft be communicated with ambient atmosphere, described air vent upper end is connected with arc transition with between air shaft lower end.
The sectional dimension of described air vent is 1.5m × 2.0m.
The beneficial effects of the utility model are: the utility model adopts local to dig, utilizes concrete lining to form the ventilation layout pattern of both sides independence air inlet, avoid directly contacting with high-velocity flow section gas-vapor mix, enough air can be provided to greatest extent, ensure ventilatory effect, simultaneously to streamflow regime also without obvious adverse effect, do not increase difficulty of construction, construction quality also can be guaranteed, safe and reliable.
Accompanying drawing explanation
Fig. 1 is flood discharging tunnel aerator tradition ventilation arrangement diagram.
Fig. 2 is structural layout plan of the present utility model.
Detailed description of the invention
As shown in Figure 2, the present embodiment is a kind of air entraining facilities of flood discharging tunnel, be provided with air mixing corrosion reducing facility and section is the flood discharging tunnel 1 of gateway opening shape, it is concrete base plate 2 bottom this flood discharging tunnel, both sides are concrete-lined hole wall 3, the independent ventilation hole 5 that sectional dimension is 1.5m × 2.0m is vertically furnished with in the wall of hole, aerated cavity 4 is formed bottom air vent and between base plate 2, with the independent ventilation vertical shaft 6 that the section center line of flood discharging tunnel 1 is communicated with ambient atmosphere for axis is provided with, be connected with arc transition between this air shaft lower end with air vent 5 upper end.When being provided with air mixing corrosion reducing facility in flood discharging tunnel 1, adopt local to dig, utilize concrete lining to form the ventilation layout pattern of both sides independence air inlet, thus adapt to the requirement of ventilation tonifying Qi, air entraining facilities independent ventilation hole 5 is connected with ambient atmosphere by independent ventilation vertical shaft 6, instead of from the direct tonifying Qi of hole top gas-vapor mix.Compared to traditional ventilation layout pattern, its ventilatory effect is good, does not increase difficulty of construction, and construction quality is also easily guaranteed.
The present embodiment Specific construction step:
1) flood discharging tunnel 1 local digs: according to the deployment scenarios of air mixing corrosion reducing facility, determines the position that flood discharging tunnel 1 local digs; The size of air vent 5 is determined according to air-conditioning requirement, is generally 1.5m × 2.0m (wide × long); The geological conditions that the thickness of concrete-lined hole wall 3 digs position according to local is determined, generally gets 1m.
2) concrete lining: construction of concrete lining can be carried out after having dug in hole, concrete grade requires to be not less than C25.
Claims (2)
1. the air entraining facilities of a flood discharging tunnel, comprise the flood discharging tunnel (1) being provided with air mixing corrosion reducing facility, it is concrete base plate (2) bottom flood discharging tunnel, both sides are concrete-lined hole wall (3), vertical independent ventilation hole (5) is arranged in the wall of described hole, stable aerated cavity (4) is formed bottom air vent and between base plate (2), it is characterized in that: described flood discharging tunnel (1) section is gateway opening shape, the independent ventilation vertical shaft (6) be communicated with ambient atmosphere for axis is provided with flood discharging tunnel section center line, be connected with arc transition between described air vent (5) upper end with air shaft (6) lower end.
2. the air entraining facilities of flood discharging tunnel according to claim 1, is characterized in that: the sectional dimension of described independent ventilation hole (5) is 1.5m × 2.0m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520251098.8U CN204676501U (en) | 2015-04-23 | 2015-04-23 | A kind of air entraining facilities of flood discharging tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520251098.8U CN204676501U (en) | 2015-04-23 | 2015-04-23 | A kind of air entraining facilities of flood discharging tunnel |
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| CN204676501U true CN204676501U (en) | 2015-09-30 |
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| CN201520251098.8U Active CN204676501U (en) | 2015-04-23 | 2015-04-23 | A kind of air entraining facilities of flood discharging tunnel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106919772A (en) * | 2017-04-24 | 2017-07-04 | 中国电建集团成都勘测设计研究院有限公司 | High-velocity flow free flow drain cavern gas supplementary structure method of construction and gas supplementary structure |
| CN108842733A (en) * | 2018-08-06 | 2018-11-20 | 中国电建集团华东勘测设计研究院有限公司 | A kind of asynchronous three-dimensional air mixing corrosion reducing structure |
| CN109083107A (en) * | 2018-07-17 | 2018-12-25 | 四川大学 | It is a kind of to choose the air entraining facilities that stream forms aerated cavity using water flow centripetal force inertia |
| CN109295939A (en) * | 2018-10-29 | 2019-02-01 | 中国电建集团华东勘测设计研究院有限公司 | A kind of air compensating system and its ventilation amount control method of high-velocity flow tunnel |
-
2015
- 2015-04-23 CN CN201520251098.8U patent/CN204676501U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106919772A (en) * | 2017-04-24 | 2017-07-04 | 中国电建集团成都勘测设计研究院有限公司 | High-velocity flow free flow drain cavern gas supplementary structure method of construction and gas supplementary structure |
| CN106919772B (en) * | 2017-04-24 | 2023-06-20 | 中国电建集团成都勘测设计研究院有限公司 | Construction method of air supplementing structure of high-speed water flow open flow water drain hole and air supplementing structure |
| CN109083107A (en) * | 2018-07-17 | 2018-12-25 | 四川大学 | It is a kind of to choose the air entraining facilities that stream forms aerated cavity using water flow centripetal force inertia |
| CN108842733A (en) * | 2018-08-06 | 2018-11-20 | 中国电建集团华东勘测设计研究院有限公司 | A kind of asynchronous three-dimensional air mixing corrosion reducing structure |
| CN109295939A (en) * | 2018-10-29 | 2019-02-01 | 中国电建集团华东勘测设计研究院有限公司 | A kind of air compensating system and its ventilation amount control method of high-velocity flow tunnel |
| CN109295939B (en) * | 2018-10-29 | 2024-05-31 | 中国电建集团华东勘测设计研究院有限公司 | Air supplementing system of high-speed water flow tunnel and air ventilation control method of air ventilation system |
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