Centralized driving flip-flow screen

Abstract

The invention discloses a centralized driving flip-flow screen, which mainly comprises an upper screen box, a lower screen box, an elastic screen stencil formed by connecting a plurality of rectangular screen plates, a driving shaft for connecting the upper and lower screen boxes, a supporting frame, a driving shaft and a belt wheel driving mechanism, wherein the belt wheel driving mechanism is arranged at the middle lower part of the driving shaft, the middle part of the driving shaft is provided with a belt wheel connected with the belt wheel driving mechanism, and the axes at the left and the right of the belt wheel are symmetric and are machined with two eccentric axis sections respectively to form the coaxial four-section eccentric driving shaft; an upper cross beam of the supportingframe is a semi-columnar upper cross beam; the relative motion of the two screen boxes fulfills the deflection motion of the screen stencil so as to realize material screening; and the centralized driving flip-flow screen adopts the structure that the number of the screen hole of the screen surface at the front end is less, the number of the screen hole of the screen surface at the middle sectionis medium and the number of the screen hole of the screen surface of the tail section is more in the aspect of the screen hole arrangement so as to ensure the effects that the screen surface at the front end is not easy to break when conveying the materials and the integral screen surface screens uniformly; and the centralized driving flip-flow screen has the advantages of simple structure, stableoperation, energy consumption conservation, long service life and wide practicability.

Description

technical field [0001] The invention relates to a centrally driven relaxation screen, which is especially suitable for dry deep screening of wet fine coal in a coal preparation plant, and also suitable for dry deep screening of other types of materials. Background technique [0002] The use of vibrating screens to sort coal has become an indispensable equipment in coal preparation plants, but vibrating screens are vulnerable and deep screening holes occur from time to time. There are many kinds of vibrating screens currently in use, and the patent number is 97107249, which is named "Multi-mesh elastic collision screen and its screening method", which provides a multi-free elastic rod suitable for dry screening of fine-grained materials. The high-speed collision screen and its screening method consist of a plurality of screen wires arranged on the screen frame to form a screen. The screen wires and the frame holes are in clearance fit, and the screen wires collide with the fr...

AI Technical Summary

Problems solved by technology

Without increasing the size of the vibrator, the vibration strength of the vibrating screen is improved, but the structure is complicated, the manufacturing cost is high, and the energy consumption is large

Patent No. 02112809, titled "Large Vibrating Screen Excited by Super Statically Determinate Mesh Beams", provides a super static definite mesh beam device between the sieve plates on both sides of the screen box, and uses at least one super static definite support plate to connect multiple main The beams are connected to form a containment body, and the vibration exciters are respectively added to the vibration transmission shafts on both sides of the super statically indeterminate support plate. The structure is complex, the vibration quality is large, and the energy consumption is large

The patent number is 97235985.0 Suspension-type double-sided drive relaxation screen, which adopts a suspended crank slider and four-bar linkage mechanism, but the bracket on the screen box adopts a flat structure, and the screen surface is vulnerable; secondly, the relaxation screen uses a 3-stage crankshaft and a pulley It is two separated parts and the biased asymmetric power source of the motor. With this structure, the crankshaft is prone to fatigue damage due to torque, and the crankshaft is too thick and difficult to process. Finally, each section of the relaxation screen adopts two sections of large, middle and small sections. It is beneficial to screen through, but the number of sieve holes on each sieve plate along the length of the sieve is the same, the reliability of the sieve surface is difficult to guarantee, and the sieve surface is vulnerable

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