Asphalt spray nozzle

Abstract

The invention relates to an asphalt spray nozzle. The asphalt spray nozzle comprises a shell, an end cover, a piston body, a valve barrel, a valve rod, a valve head and a nozzle, wherein a cavity, a connecting channel, an asphalt inlet, an asphalt reflux inlet and a transition channel are formed in the shell; the end cover is arranged at the top of the shell; the piston body is arranged in a cavity and divides the cavity into an upper air chamber and a lower air chamber; the valve barrel is arranged in the connecting channel; the valve rod is fixedly connected to the piston body, and the bottom of the valve rod extends out of the lower end of the valve barrel; the valve head is arranged at the bottom of the valve rod; the nozzle is arranged at the bottom of the shell; the side wall of the upper air chamber is provided with an upper vent hole, and the side wall of the lower air chamber is provided with a lower vent hole; the lower part of the shell is provided with a high pressure exhaust channel in which an auxiliary valve barrel is arranged; the high pressure exhaust channel is communicated with the transition channel positioned between the connecting channel and the nozzle; the transition channel communicates the connecting channel with the nozzle; a valve core capable of closing / opening the air outlet of the high pressure exhaust channel is arranged in the auxiliary valve barrel; and the high pressure exhaust channel is communicated with the lower vent hole through a control valve. The asphalt spray nozzle has a reasonable design and a compact structure.

Description

technical field [0001] The invention belongs to the technical field of nozzles, in particular to an asphalt nozzle used in highway engineering. Background technique [0002] During road construction or road maintenance, it is often necessary to spray asphalt on the road surface. The asphalt spraying vehicle is a commonly used construction machine for laying asphalt pavement. The asphalt spraying vehicle is generally equipped with a horizontal nozzle at the rear, and several nozzles are evenly spaced on the horizontal nozzle. The liquid asphalt is pumped into the horizontal nozzle by the asphalt pump and sprayed from the nozzle. Sprinkle on the road surface, and as the asphalt spraying vehicle advances, a layer of asphalt is left on the road surface to achieve the purpose of asphalt spraying. The characteristic of asphalt spraying is that asphalt is sprayed at high temperature, generally the temperature reaches above 150°C, and asphalt solidifies at low temperature. Sprinkl...

AI Technical Summary

Problems solved by technology

The difference from the existing asphalt spraying machinery is that the track of traditional asphalt spraying machinery spraying asphalt is parallel to the forward direction, and the asphalt spraying device is turned off after all the road surface spraying is completed, the spraying is stopped and the nozzle is cleaned; while the present application For the laterally moving sprinkler device designed by the applicant, the track of asphalt spraying is perpendicular to the forward direction, and every time it moves laterally (that is, the width distance of the road surface), the sprinkler device needs to be turned off, and then restarted after the nozzle mounting frame returns to the initial position For spraying, the on / off of the spraying device is relatively frequent. If each spray head is equipped with a set of cylinders and solenoid valves in the traditional way, not only the system is complicated, it is not easy to control, but also the cost is high. Phenomenon affecting construction quality

At the same time, when it is used on an asphalt paver, because the forward speed of the asphalt paver is slow, the speed of the lateral movement of the spraying device is relatively fast, that is, the working time of the spraying device is shorter than the stop working time, and the sprinkler head will not stop when the spraying work is stopped. Not only does it produce frequent noises during cleaning, but it also lasts for a long time

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