CN207484653U - Small Bottom Slope high rotation angle ladder sluice way vertical shaft - Google Patents

Abstract

The utility model discloses a kind of Small Bottom Slope high rotation angle ladder sluice way vertical shaft, including：Cylindric exhaust passage and the ring ladder sluice way being centered around outside exhaust passage, the ring ladder sluice way are made of the ladder declined step by step, and the tread length of ladder is 120 ~ 350 radians.The main target of this design is on each section ladder, and flowing forms hydraulic jump fluidised form, by the hydraulic jump of stepped surfaces, generates the energy dissipating effect of flow.Inlet shaft stream connection tunnel, carries out draining tangentially to become a mandarin.For different design aerial drainages and drop, energy dissipating can be effectively performed in the hydraulic jump formed using Small Bottom Slope high rotation angle step horizontal face.

Description

Small Bottom Slope high rotation angle ladder sluice way vertical shaft

Technical field

Ladder the utility model is related to a kind of Small Bottom Slope high rotation angle in urban water supply and sewerage engineering drainage building is let out Water channel vertical shaft is mainly used for meeting under conditions of larger drop and draining discharge, keeps high energy dissipation rate, prevents sluice way The cavitation destruction of water surface is crossed, realizes the needs of engineering safety operation.

Background technology

As the fast development of Urbanization in China, the continuous of size of urban population expand existing rainwater sewage in addition The deficiency of drainability and being further exacerbated by for Global climate change, extreme weather, which has become, restricts China's urban development An important factor for.Some heavy showers weather so that city is absorbed in serious waterlogging, and great shadow is caused to social production, life It rings.From 2008 to 2010, different degrees of waterlogging occurred for the city for having 62%.Urban rainstorm waterlogging has been urgently The significant problem of solution.

The construction and utilization of domestic and international urban rainwater drainage system show city deep layer rainwater storage tunnel system, as The important supplement of shallow-layer drainage pipeline networks can effectively alleviate the harm as caused by urban waterlogging that traditional cities construction mode is brought A series of problems, such as.

Vertical shaft is a kind of surface water to be input to as the important component of city deep layer rainwater storage tunnel system The structure of air in deep layer tunnel is discharged simultaneously in deep layer tunnel.Since city deep layer rainwater storage tunnel system is from earth's surface to deep layer The drop of tunnel space is big, will generate higher flow velocity in rainwater flowing, carries huge flow energy, thus there may be strong Strong cavitation destruction, brings structure safe operation serious threat, energy dissipating and to prevent cavitation and cavitation erosion be such vertical shaft construction Main problem.Therefore, study and design it is a kind of can meet simultaneously energy dissipating and anti-cavitation cavitation corrosion requirement vertical shaft be very necessary 's.

Utility model content

The lower stream that sluices can be made to form the Small Bottom Slope high rotation angle for falling fluidised form and adding hydraulic jump fluidised form the utility model proposes a kind of Ladder sluice way vertical shaft.

The utility model adopts the following technical solution：

A kind of Small Bottom Slope high rotation angle ladder sluice way vertical shaft, including：Cylindric exhaust passage and it is centered around exhaust passage External ring ladder sluice way, the ring ladder sluice way are made of the ladder declined step by step, and the tread length of ladder is 120~350 radians.

Compared with prior art, the utility model has the following advantages that：

Small Bottom Slope high rotation angle ladder water channel vertical shaft described in the utility model, in the shaft between for exhaust passage, on side Wall is the sluice way that rotation declines, and the sluice way surface dropped under rotation is hierarchic structure, and this hierarchic structure is with small Base slope and big rotation angle, i.e. the utility model selected the tread length of ladder that 120~350 radians are grown, constituted big The ladder plane of rotation angle, the flow under big vent flow and high drop can form hydraulic jump on the cascaded surface of this high rotation angle Fluidised form, and to be the utility model have efficient effect of energy dissipation to hydraulic jump fluidised form, and can obtain good surface self aeration effect To prevent cavitation and cavitation erosion.

The prior art is to carry out energy dissipating using nappe flow fluidised form, transition flow-shape and Slipper pair fluidised form, will not shape Into hydraulic jump fluidised form.And the utility model is light grade, big plane corner (not less than 120 radians), extends plane accordingly, this Sample can form hydraulic jump fluidised form, using energy dissipation by hydraulic jump, can effectively eliminate the energy of vertical shaft flow under the conditions of high drop, disappear Energy rate can reach more than 90%, and validity is verified by the experiment of Fig. 3.

Therefore, the ladder selection of this 120~350 radian length of the utility model has changed the fluidised form of the lower stream that sluices i.e. It is changed into hydraulic jump fluidised form, and which thereby enhances effect of energy dissipation and anti-cavitation cavitation corrosion effect, achieves unexpected good effect.

In addition, the utility model proposes the validity of Small Bottom Slope high rotation angle ladder sluice way vertical shaft obtained testing Card, it is simple for structure, provide a kind of new thinking and solution for sewerage system sluicing Dissipation of Energy.

Description of the drawings

Fig. 1 is Small Bottom Slope high rotation angle ladder sluice way vertical shaft vertical view；

Fig. 2 is Small Bottom Slope high rotation angle ladder sluice way vertical shaft sectional view；

Fig. 3 is energy dissipation rate η and carrys out the relationship of flow Q；

Fluidised form schematic diagram when Fig. 4 is small discharge per unit width；

Fluidised form schematic diagram when Fig. 5 is large discharge per unit；

Specific embodiment

A kind of Small Bottom Slope high rotation angle ladder sluice way vertical shaft, including：Cylindric exhaust passage 3 and it is centered around exhaust passage Ring ladder sluice way 4 outside 3, the ring ladder sluice way 4 are made of the ladder declined step by step, the tread length of ladder θ is 120~350 radians.In the present embodiment, the lower stream that sluices flows through ring ladder sluice way 4 by inlet channel 1, into deep layer tunnel Road 2.

Sluice way wetted surfaces be hierarchic structure, other structures parameter, including sluice way outer diameter and internal diameter, base slope, rank Terraced number and step dimension can be selected according to engineering practice；For sluice way in the ladder of different location, size can be different； Sluice way vertical shaft, vertical shaft can be vertical or out of plumb；The internal diameter of vertical shaft up and down can be identical, also may be used With different；Sluice way vertical shaft, vertical shaft form can be the forms of circle or other shapes.

The utility model proposes a kind of structure types of Small Bottom Slope high rotation angle ladder sluice way vertical shaft, utilize intermediate channel Exhaust crosses water by rotating the hierarchic structure sluice way declined.

Small Bottom Slope high rotation angle ladder sluice way has the characteristics of its uniqueness：

Due to Small Bottom Slope big corner, larger ladder plane is formed, when the smaller aerial drainage of discharge per unit width, the water on cascaded surface Stream flowing in fall+hydraulic jump flowing (see Fig. 4)；After discharge per unit width increase, the difference based on flowing, the flowing on cascaded surface is in Transition+hydraulic jump flowing or the flowing of rotary roll+hydraulic jump completely (see Fig. 5).Fall flowing, transition with traditional ladder sluice way It flows and slides flowing difference, the utility model Small Bottom Slope high rotation angle ladder sluice way, in sluicing flow process, in ladder The Background Region in face, can form hydraulic jump flowing, the presence of this hydraulic jump flowing, on the one hand by hydraulic jump rotary roll, be mixed in water body Enter a large amount of air, this aerated flow can have the function that reduce or remit cavitation destruction；On the other hand, hydraulic jump rotary roll, can To consume a large amount of water energy, the energy that deduction and exemption water body carries generates destruction to structure.

The utility model proposes Small Bottom Slope high rotation angle ladder sluice way vertical shaft structure type, i.e., in sluice way vertical shaft Flow surface setting Small Bottom Slope high rotation angle ladder, design its sluice way discharge per unit width control in 60m²Within/s, have good Good effect of energy dissipation and the effect for preventing cavitation destruction.

Claims (2)

1. a kind of Small Bottom Slope high rotation angle ladder sluice way vertical shaft, which is characterized in that including：Cylindric exhaust passage（3）And it encloses It is wound on exhaust passage（3）External ring ladder sluice way（4）, the ring ladder sluice way（4）By the ladder declined step by step It forms, the tread length of ladder（θ）For 120 ~ 350 radians.

2. Small Bottom Slope high rotation angle ladder sluice way vertical shaft according to claim 1, which is characterized in that it is lower sluice stream by into Water channel（1）Flow through ring ladder sluice way（4）, into deep layer tunnel（2）.