Novel double-cylinder straight suction nozzle

Abstract

The invention discloses a novel double-cylinder straight suction nozzle which can be widely applied to the field of pneumatic conveying. The novel double-cylinder straight suction nozzle is mainly composed of two parts, namely an inner pipe and an outer pipe; the inner pipe and the outer pipe are overall fixed together; a horn opening is formed in the bottom of the inner pipe, and a serrated notchwith a certain height is machined in the lower edge of the horn opening; two openings are symmetrically formed in the upper end of the outer pipe, and two valves are mounted at the openings; and theentering quantity of secondary air is controlled by adjusting the sizes of openings of the valves. During working, the suction nozzle is inserted into a material pile by a certain depth, the enteringquantity of the secondary air is controlled by adjusting the sizes of the openings of the valves, the secondary air enters a gap between the inner pipe and the outer pipe through inlets of the valvesand then enters the inner pipe through the serrated notch in the bottom end of the inner pipe, and thus the effects of accelerating material flow and adjusting the inner pipe conveying wind speed areachieved.

Description

technical field [0001] The invention belongs to the field of pneumatic conveying and relates to a novel double-tube straight suction nozzle. Background technique [0002] Pneumatic conveying refers to the use of the energy of airflow to transport granular materials along the direction of airflow in a closed pipeline, which is a specific application of fluidization technology. The pneumatic conveying device has a simple structure and is easy to operate. It can be used for horizontal, vertical or inclined conveying. During the conveying process, it can also perform physical operations such as heating, cooling, drying and air classification of materials or certain chemical operations. [0003] According to the working principle, pneumatic conveying can be roughly divided into two types: suction conveying and pressure conveying. When the gas pressure in the pipeline is lower than the atmospheric pressure, it is called suction-type pneumatic conveying. When the fan starts and th...

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Problems solved by technology

[0006] However, it is difficult to manually adjust the four adjusting bolts to ensure that the outer tube is evenly stressed and has the same displacement, which affects the gap between the end faces of the inner and outer tubes and causes unstable feeding; at the same time, the suction nozzle and the suction tube are connected by ordinary bolts, which makes disassembly inconvenient; The arc at the end of the tube increases the difficulty of manufacturing; the inner and outer tubes of the traditional suction nozzle are concentric and guided by the slider, and the secondary air enters from the inner and outer tubes to cause friction with the slider, which not only increases the pressure loss but also affects the delivery of air. Efficiency, the inner and outer tubes can move with each other, under the action of friction, it is easy to generate vibration, resulting in unstable suction

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