Inner double circulation runner type stretchable pitch sprinkling device

Abstract

The invention relates to an inner double circulation runner type stretchable pitch sprinkling device which mainly comprises a support frame, a fixed sprinkling rod component, a left stretching sprinkling rod component and a right stretching sprinkling rod component which are the same in structure, and a pitch sprinkling valve, wherein the fixed sprinkling rod component is mounted on the support frame; each of the left stretching sprinkling rod component and the right stretching sprinkling rod component comprises a primary pitch pipeline, a secondary pitch pipeline, a rotating joint, a side sprinkling pipe and a pitch sprinkling valve; each primary pitch pipeline, each secondary pitch pipeline and each side sprinkling pipe are all divided into an oil inlet channel and an oil return channel by separating plates; an inner flowing pipe with smaller diameter is arranged in each rotating joint; and a transmission gear is driven by a hydraulic motor which is mounted on the support frame and a transmission rack fixedly arranged on the left stretching sprinkling rod component and the right stretching sprinkling rod component is driven to do linear motion, so that expansion and retraction of the left stretching sprinkling rod component and the right stretching sprinkling rod component are realized. Without using an externally connected pipeline, the inner double circulation runner type stretchable pitch sprinkling device can realize pitch circulation; the sprinkling distributing width is wide; and the structure is simple.

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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