Rotary stripping type soil multi-stage screening machine for land investigation based on photoelectric sensing

Abstract

The invention discloses a rotary stripping type soil multi-stage screening machine for land investigation based on photoelectric sensing. The rotary stripping type soil multi-stage screening machine for land investigation based on photoelectric sensing comprises an air pressure pushing type rotary screening device, an extrusion type pneumatic cleaning type pre-crushing device, a gravity driving type elastic screening device, a double-roller grinding device, an anti-blocking type material conveying device and an auxiliary transferring and collecting device. The invention belongs to the technical field of sample screening, particularly relates to the rotary stripping type soil multi-stage screening machine for land investigation based on photoelectric sensing, which is simple in structure and high in system efficiency. An air pressure pushing type rotary screening device is creatively provided on the basis of the intermediary principle and the air pressure and hydraulic structure principle, air flow is used as an intermediary to push soil particles to quickly and efficiently pass through a screening barrel, and the function that the air flow periodically pushes a soil sample is achieved by means of the magnetic attraction principle under the condition that no sensor is involved, so that the problems that an existing screening tool is low in screening efficiency and low in precision are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of sample screening, in particular to a rotary peeling type soil multi-stage screening machine for national land survey based on photoelectric sensing. Background technique [0002] The data results of the land survey can objectively reflect the problems existing in land use, cultivated land protection, ecological construction, and economical and intensive land use. During the land survey, it is necessary to detect and analyze the soil composition of the land, and draw the particle gradation curve to understand the properties of the soil. To draw the particle gradation curve, the soil particles need to be sieved, and the content of each particle size needs to be weighed after sieving. However, when the temperature in the northern winter is low, the soil surface is prone to lack of organic matter, resulting in poor soil structure, and the soil structure is damaged under the action of various external factors....

AI Technical Summary

Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a photoelectric sensor-based rotary stripping soil multi-stage soil survey machine with simple structure and high system efficiency. The problem of sticking to the crushing tool, the present invention is based on the principle of air pressure and hydraulic structure (replacing the solid part of the object with gas or fluid), and creatively proposes a squeeze-type pneumatic cleaning pre-crushing device, without any air pump and sensor In the case of intervention, using simple air pressure to push, the self-cleaning function of the crushing tool is realized, which effectively solves the problem of easy adhesion on the crushing tool during the soil crushing process in winter

[0005] In order to solve the problems of low screening efficiency and low precision of existing screening tools, the present invention is based on the principle of intermediary (using intermediate objects to transfer or perform an action), pneumatic and hydraulic structure principles (using the solid part of the object with gas or Fluid replacement), creatively proposed a pneumatically driven rotary screening device, which uses air flow as an intermediary to push soil particles through the screening cylinder quickly and efficiently, and uses the principle of magnetic attraction to achieve air flow without any sensor intervention. The function of periodically promoting soil samples effectively solves the problems of low screening efficiency and low precision of existing screening tools. At the same time, photoelectric sensors are used to prevent soil overflow during collection after screening.

[0006] In order to solve the problems of high wear and low reliability of existing screening tools, the present invention is based on the principle of turning harm into benefit (using harmful factors to obtain beneficial results) and the principle of cheap substitutes (replacing expensive objects with several cheap objects) ), creatively proposed a gravity-driven elastic screening device, which skillfully converts the gravitational potential energy generated by the falling soil into the mechanical energy of the vibration of the screening plate, and uses cheap springs and rubber pads to realize the screening without any driving unit. The elastic vibration of the screening plate is avoided, the damage caused by the traditional drive unit to the screening plate is avoided, and the problems of high wear and low reliability of the existing screening tools are effectively solved

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