Hydraulically driven telescopic type pitch spraying device

Abstract

The invention relates to a hydraulically driven telescopic type pitch spraying device which mainly comprises a left spraying rod component, a right spraying rod component, a hanging bracket and a through-flow block, wherein the left spraying rod component and the right spraying rod component are bilateral symmetrical components and respectively comprise a spraying rod, a spraying valve, a lower connecting pipe, a lower stretching pipe, an upper connecting pipe, an upper stretching pipe and a hydraulic cylinder; an inner pipe of the lower stretching pipe and an outer pipe of the lower stretching pipe, which can stretch mutually, are matched with each other, thereby forming the lower stretching pipe; an inner pipe of the upper stretching pipe and an outer pipe of the upper stretching pipe, which can stretch mutually, are matched with each other, thereby forming the upper stretching pipe; the spraying rod, the inner pipe of the lower stretching pipe and the inner pipe of the upper stretching pipe are connected into a route through the upper connecting pipe and the lower stretching pipe; the left spraying rod component is communicated with the right spraying rod component through the through-flow block; and the hanging bracket is mounted on the hydraulic cylinder. The hydraulic cylinder is used for driving the left and right spraying rod components to stretch and retract, and the hydraulically driven telescopic type pitch spraying device has the advantages of reliable performance, manpower-saving property, simplicity and convenience in maintenance, and the like.

Description

technical field [0001] The invention relates to a hydraulically driven telescopic asphalt spraying device used on a pavement bonding material spreading machine such as an asphalt spreading vehicle and a synchronous gravel sealing vehicle, belonging to the technical field of asphalt pavement construction and maintenance equipment . Background technique [0002] On the asphalt spraying vehicle and synchronous crushed stone sealing vehicle in the field of asphalt pavement construction and maintenance machinery, the asphalt spraying device in use is generally a rotary folding type, which consists of a main spraying rod fixed at the rear of the vehicle and two movable The rotating sub-spray rod is composed of the main spray rod and the sub-spray rod through a rotary joint to realize the coaxial transmission of asphalt and heat transfer oil between the two. When spraying starts and ends, the handle installed on the secondary spraying rod is manually operated to unfold or fold the...

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

In addition, the rotary joint works at high temperature for a long time, and the seal is easily damaged, resulting in serial leakage of asphalt and heat transfer oil, and poor reliability

[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

At the same time, the driving force of the stepping motor is small, and this mechanism converts the rotary motion into a linear motion through the screw nut mechanism. The mist droplets during asphalt spraying float and attach to the screw, which often causes the screw to rotate after solidification. Difficult, it is difficult to start the next job, and often requires manual cleaning, which is time-consuming and laborious

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