Device and method for preventing cavitation and vibration of underground filling pipeline

Abstract

The invention discloses a device and a method for preventing cavitation and vibration of an underground filling pipeline. The device is composed of a buffer tank, a collecting hopper and an accident pool. The method comprises the five steps of pressure relief chamber building, pressure relief device erecting, auxiliary facility installing, filling pipeline connecting and accident emergency treatment. According to the device and method, a special pressure relief device is arranged between a pumping pipeline and a self-flowing pipeline, the pumping pipeline which is closed in the whole process is converted into the pumping pipeline and the self-flowing pipeline which are open and relatively independent, and therefore the overall energy consumption of a pipeline conveying system is reduced, the phenomena of liquid flow cavitation, negative pressure, cavities and the like of the closed pipeline are avoided, cavitation and strong vibration of the filling pipeline are prevented, and the conveying safety and stability of the filling pipeline are guaranteed. The device and method have the advantages of being simple in structure, high in practicability, small in investment and capable of reducing energy consumption.

Description

technical field [0001] The invention belongs to the technical field of mine filling, in particular to a device and method for preventing cavitation and vibration of an underground filling pipeline. Background technique [0002] Mine filling generally refers to the process of preparing qualified filling slurry on the surface, transporting it underground through pipelines, and filling the goaf. According to the different sources of filling power, the pipeline transportation methods of filling slurry can be divided into two forms: self-flowing and pumping, and mines can flexibly choose according to the transportation performance of filling slurry and the size of the filling line. Among them, the pumping flow rate of the filling slurry is generally about 1.5m / s, and the artesian flow rate is controlled at about 3m / s. [0003] Many mines that adopt the joint development of adit + shaft (or inclined shaft) will face such a special situation: the filling slurry transported in the ...

AI Technical Summary

Problems solved by technology

If the currently commonly used delivery method of fully enclosed pumping is still adopted, the filling slurry entering the shaft or inclined shaft will continue to accelerate under the action of its own potential energy, and then change from a low-speed full pipe flow to an accelerated partial pipe flow, resulting in Phenomena such as liquid cavitation, negative pressure, cavitation and cavitation will not only sharply accelerate the erosion rate of the pipeline, but also cause problems such as vacuum bridging water hammer and strong vibration of the pipeline, endangering the safety and stability of the entire filling pipeline transportation

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