Bilateral-sector-support flip-flow screen

Abstract

The invention discloses a bilateral-sector-support flip-flow screen. The bilateral-sector-support flip-flow screen mainly comprises a brake, a speed reducer, a motor, two eccentric shafts, four connecting rod, a swing rod, an inner screen frame sector support, an outer screen frame sector support, an inner screen frame, an outer screen frame, screen fixing steel angles, a sector support guide rail, a segmented polyurethane screen surface and the like. The two eccentric shafts are connected with the swing rod by the four connecting rods to form a crank swing rod mechanism. When the motor drives the eccentric shafts to rotate through the speed reducer, under the action of the connecting rods, the swing rod swings around a swing rod hinge hole back and forth so as to drive the inner screen frame and the outer screen frame to move relatively; and since two ends of the segmented polyurethane screen surface are fixed by the screen fixing steel angles of the inner screen frame and the outer screen frame, tension and relaxation scratching movement of the segmented polyurethane screen surface is realized. The inner screen frame support and the outer screen frame support can form an ejection surface with a certain inclination angle when the segmented polyurethane screen surface is tensioned, so that materials can bear large self weight and high impact pressure when forwarding and penetrating the screen. The bilateral-sector-support flip-flow screen has the advantages of novel working principle, simple structure, high bearing capacity and high reliability.

Description

technical field [0001] The invention relates to a double-sided fan-shaped support relaxation screen, which belongs to dry screening equipment for wet fine-grained materials, and is especially suitable for dry screening of wet fine-grained coal. Background technique [0002] In the process of coal mining, due to water seepage in the coal seam, underground dust-proof water spraying measures and improper underground management, the moisture content of the mined raw coal is above 7%. Under the action, they stick together to form coal lumps, and stick to the screen during the screening process, which is not conducive to screening and affects the screening efficiency; dry screening of wet fine coal is a major problem faced by my country's coal production process. one of the problems. The relaxation screen is a kind of screening equipment that uses the elastic screen surface to perform relaxation movement to achieve material sorting. Its notable feature is that the vibration acceler...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent 200810195649.8 discloses a centralized drive type relaxation screen, which has a simple structure, stable movement, energy saving, and at the same time can ensure that the front screen surface is not easy to break when conveying materials and the effect of the entire screen surface being evenly screened, but The upper and lower screen frames are suspended on the frame by suspension rods. When the screen frame moves, the ring holes at both ends of the suspension rods bear large tension and impact, which is easy to wear or break; The support frame of the screen makes the sieve plate free of bending stress, greatly improving the reliability and service life of the sieve plate, but the processing technology of the semicircular beam and the installation process of the screen are relatively complicated; Chinese patent 00253302.2 discloses a dual-quality The body independently supports the double-drive relaxation screen, and the material buffer plate is set at the feeding end of the inner screen box, which improves the service life of the screen machine, but the inner and outer screen box support units used by it are subject to alternating bending stress. The connection with the screen box is easily damaged

In addition, the above two patents are both based on the working principle of the crank slider mechanism, and the machining of the two-way eccentric shaft required by it is relatively complicated; Chinese patent application 201110080684.7 discloses a relaxation screen, and the screen beams of the two screen frames are arranged alternately , the elastic screen surface is installed on the crossbeam of the screen surface, and the two screen frames are connected together by the main vibration spring and the elastic connecting rod exciter. When the two screen frames move relative to each other, the upper and lower surfaces of the main vibration spring bear the shear load, and the wear is severe.

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