Ultrasonic atomization dust-settling nozzle for underground coal mine

Abstract

An ultrasonic atomization dust-settling nozzle for an underground coal mine is characterized in that an air inlet channel is vertically arranged along the tangential direction of a cylindrical cavity and led into the cylindrical cavity, the cylindrical cavity is communicated with an air whistle nozzle along a central axis, an air whistle comprises the air whistle nozzle and an air whistle resonance cavity, the air whistle nozzle is fixed to the bottom of a nozzle body, the air whistle resonance cavity is correspondingly fixed to the top of the nozzle body, a nozzle body forming space is arranged on the periphery of the air whistle to form a sonic wave oscillation atomization area, the nozzle body comprises a nozzle cylinder and a nozzle base for swirling the air whistle by means of connection, the nozzle cylinder is arranged on the periphery of the air whistle, a water inlet is arranged on the lower portion of the nozzle cylinder, an adjusting bolt hole is arranged at the top axis of the nozzle cylinder, and a nozzle is arranged at the top side end of the nozzle cylinder. By the aid of an airflow sounder, spark is avoided, the ultrasonic atomization dust-settling nozzle is reliable in working performance and convenient in cleaning, liquid drops with large diameters are secondarily atomized by means of combined ultrasonic atomization, atomization efficiency and power are improved, and the ultrasonic atomization dust-settling nozzle can be adjusted into an atomization mode and an air humidification mode.

Description

technical field [0001] The invention relates to an ultrasonic atomizing nozzle, in particular to an ultrasonic atomizing dust-reducing nozzle used for coal mine underground working faces, tunneling working faces, anchor spraying, transfer points and other dust-generating points. Background technique [0002] Coal mining is one of the important basic industries, and the number of people engaged in coal mining is relatively large, ranking first among various mining industries. Pneumoconiosis is a major occupational disease in coal mines. It not only affects the production and development of coal enterprises, but also seriously endangers people's health and life. [0003] At present, the size and proportion of dust particles are divided into four measurement ranges: greater than 10 microns; 5-10 microns; 2-5 microns; less than 2 microns. Among them, the most harmful to the human body is the dust below 5 microns. In coal mines, in addition to the invisible dust that is more ha...

AI Technical Summary

Problems solved by technology

However, as the water mist becomes finer and finer, it is worried that the water mist will quickly evaporate in a space with a relative temperature of less than 100% before capturing the dust.

[0005] Most of the existing atomizing nozzles are centrifugal or crushing, and some scholars have studied ultrasonic atomization. They have their own advantages in industrial applications, but for underground applications in coal mines that require fire protection and explosion protection. Its limitation is that the centrifugal and broken atomizing nozzles are both rotary spraying, and the dust concentration in mines is high, the pollution is large, and the lubrication conditions are poor. The dust falls into the bearing with the mist, and the rotating part is easily damaged; secondly The ultrasonic atomizing nozzle used in industry is the inverse piezoelectric effect. The mechanical deformation of the crystal is caused by the alternating electric field, thereby generating acoustic vibration, that is, the conversion of electrical energy into sound energy. This ultrasonic atomizing nozzle structure can obtain high However, it is difficult to popularize and apply to mines with fire and explosion-proof requirements; the third is that the traditional atomization nozzle has a large particle size of water mist, which is not ideal for capturing respirable dust, and is very easy to form on the working surface. Accumulated water affects normal production

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