Inner double circulation runner type stretchable pitch sprinkling device

Abstract

A retractable asphalt spraying device with internal double circulation channel, which is mainly composed of a support frame, a fixed spray rod assembly, a left telescopic spray rod assembly and a right telescopic spray rod assembly of the same structure, and an asphalt spray valve. The assembly is installed on the support frame; the left telescopic spraying boom assembly and the right telescopic spraying boom assembly respectively include a first-stage asphalt pipe, a secondary asphalt pipe, a rotary joint, a side spray pipe and an asphalt spray valve; the first-stage asphalt The pipeline, the secondary asphalt pipeline, and the side spray pipe are divided into an oil inlet passage and an oil return passage by a partition, and a flow inner pipe with a small diameter is arranged in the rotary joint. The hydraulic motor on the support frame drives the transmission gear, and drives the transmission rack fixed on the left telescopic spray rod assembly and the right telescopic spray rod assembly to make a linear motion, so as to realize the unfolding and closing of the left telescopic spray rod assembly and the right telescopic spray rod assembly. Retracted; it can realize asphalt circulation without external pipes, with large spreading width and simple structure.

Description

technical field [0001] The present invention relates to a retractable asphalt spraying device with internal double-circulation channels, specifically road binder spraying machines such as asphalt spraying vehicles, synchronous gravel sealing vehicles and ultra-thin wearing layer paver, etc. A retractable asphalt spraying device with internal double-circulation channels used in the utility model belongs to asphalt pavement construction and maintenance equipment. Background technique [0002] In the field of asphalt pavement construction and maintenance equipment, asphalt spraying vehicles, synchronous crushed stone sealing vehicles and ultra-thin wear layer paver, the asphalt spraying device in use is generally a manual rotary folding type, which is fixed on the rear of the vehicle by a It is composed of the main spraying rod and two rotatable auxiliary spraying rods. The main spraying rod and the auxiliary spraying rod are connected by a rotary joint to realize the coaxial t...

AI Technical Summary

Problems solved by technology

Since asphalt must be heated to a high temperature of 160-190°C before it can be sprayed, the safety of operators is greatly threatened, and accidents such as burns are prone to occur

At the same time, the manual operation is labor-intensive and the work efficiency is low, which increases the preparation time before construction

Under the working condition that needs to change the width or turn for asphalt spraying, the unfolded spraying boom needs to be manually folded back, and it often happens that the spraying boom collides with the curb and is damaged due to the negligence of the operator. Affect the construction progress

[0003] Chinese patent 200920018475.8 discloses a telescopic spraying rod for an asphalt distributor, which consists of a fixed central main spraying rod and two retractable auxiliary spraying rods on the left and right. The extension and retraction of the spray rod and the complex structure of the transmission system increase the difficulty of manufacturing and maintenance

[0005] Hot asphalt generally needs to circulate in the spray pipe for 5-10 minutes before spraying, and preheat the spray pipe and spray valve to avoid asphalt cooling and viscosity increase due to the temperature of the spray pipe and spray valve being lower than the temperature of the asphalt. Therefore, the asphalt spraying device in use generally adopts an external hose to realize the function of oil circulation and oil return, and the structure is relatively complicated

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