Flow-dividing regulation and storage system with spiral steps and pore plate drop well

Abstract

The invention belongs to the technical field of urban water supply and drainage engineering drainage buildings, and provides a flow-dividing regulation and storage system with spiral steps and a pore plate drop well. The flow-dividing regulation and storage system comprises a water inlet pipeline, a spiral step vertical shaft, a pore plate drop well and two water outlet pipelines. Influences brought by different flow changes in an urban deep tunnel system can be perfectly solved, in the case of small flow, water flow passes through the spiral step vertical shaft, the size of the spiral steps can be flexibly adjusted, and discharged water flow carrying air is subjected to small-scale spiral rolling, air entrainment and friction at the corners of the steps, so that stable flow guide of the water flow is facilitated; and when the flow is large, water flow passes through the pore plate drop well, the pore plate drop well overcomes the defect that the thickness of a water cushion layer in a large-height-difference lower stilling well is difficult to control in a traditional drop type vertical shaft, the pore diameter, the pore distance and the pore plate distance are in critical magnitude, discharged water flow can dissipate energy through the multi-stage pore plates, and the protection workload of the pore plates and the stilling well is relieved.

Description

Technical field [0001] The invention belongs to the technical field of urban water supply and drainage project, which provides a spiral step and a conversion system with a hole plate. Background technique [0002] In the prior art, the shaft structure is mainly divided into four types: spiral ramp shaft, drop shaft, swirl shaft and flap shaft, the advantage of spiral ramp shaft is: [0003] 1) The energy is more fully, and the water flow is rubbed by the ramp and the side wall, consuming the water head energy, protects the bottom of the shaft and the deep pipeline. [0004] 2) Historically, technology maturation, simple structure, easy to design, cost-effective, adaptability, and less ventilation. [0005] 3) Convenient, easy to overhaul, reliable operation, stable downstream water flow, the width and slope of the ramp can be flexibly changed according to different environments and flood probability. [0006] The spiral ramp shaft has many advantages, and there is also its own or...

AI Technical Summary

Problems solved by technology

[0007] 1) The application field is single, and it is always limited to drainage and energy dissipation projects with medium and small water heads, and the effect of drainage and energy dissipation for high water heads is poor

[0008] 2) Traditional spiral ramp shafts are suitable for a small range of discharge flow, which restricts municipal engineering facilities from participating in flood control efforts and operation management

[0009] 3) The utilization rate of the operating environment is insufficient, and the expected effect of the project has not yet been achieved

[0011] 1) The flow state in the shaft is turbulent, and the force of the stilling shaft at the bottom is complex, which may easily cause structural vibration between the shaft and the pipeline, affecting its service life and energy dissipation and diversion effect;

[0012] 2) The surface of the stilling shaft at the bottom of the shaft is under great pressure, which requires high material strength and excavation depth, and high construction and maintenance costs;

[0013] 3) Only suitable for small height difference and solid ground

Affected by many factors such as environmental terrain constraints and technical level, some spiral ramp shafts and drop shafts have weak flood capacity, which leads to the failure of underground municipal engineering to achieve the expected effect in urban flood control during flood seasons, resulting in a sharp increase in surface flood discharge pressure. In severe cases, it may even cause urban waterlogging and other hazards; a single shaft cannot divide and conquer different flows, and the water flow is still discharged into the urban sewage treatment plant under the condition of large flow in the flood season, resulting in an excessive operating load of the treatment plant; not only that, it is unreasonable The shaft design will reduce the energy dissipation rate, resulting in a narrower scope of application, higher maintenance costs in the later period, and heavy urban economic losses.

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