Quick-return material separating screen

Abstract

The invention relates to screening equipment, in particular to a quick-return material separating screen. The quick-return material separating screen comprises a rack, a power mechanism fixed to the rack, a screen frame in sliding connection with the rack and a transmission mechanism connected with the power mechanism and the screen frame. The transmission mechanism comprises a drive crank, a connecting rod, a driven crank and transmission connecting rods. A rotary shaft of the drive crank and a rotary shaft of the driven crank are rotationally connected to the rack. One end of the connecting rod is rotationally connected to the free end of a connecting rod of the drive crank, and the other end of the connecting rod is rotationally connected to the free end of a connecting rod of the driven crank. One end of each transmission connecting rod is rotationally connected to the free end of the connecting rod of the driven crank, and the other end of each transmission connecting rod is rotationally connected to the screen frame. The problem that when a vibration screen slides in a reciprocating manner in the prior art, speed changes are small, and consequently sorting efficiency of materials in the vibration screen is low is solved, and a vibration screen is large in speed change in the reciprocating motion process is provided..

Description

technical field [0001] The invention relates to screening equipment, in particular to a sorting screen for rush-return materials. Background technique [0002] Sieving is a method of separating particle groups according to particle size, specific gravity, chargeability, magnetic properties and other powder properties. The operation of dividing the mixture of different particle sizes into various particle size levels with a screen surface with holes is called screening. (1) The factors affecting the screening are summarized as follows: suitable particle size range, the closer the particle size of the material is to the boundary diameter, the harder it is to separate; the moisture content in the material increases, the viscosity increases, and it is easy to agglomerate or block the sieve hole; The shape, density is small, and the material is not easy to sieve; the parameters of the sieving device. (2) Screening equipment, there are two types of drug screening used for screen...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem in the prior art that when the vibrating screen reciprocates and slides, the speed does not change much, resulting in low material sorting efficiency in the vibrating screen, it is intended to provide a vibrating screen with a large speed change during the reciprocating motion. screen

[0006] The beneficial effect of the basic scheme is: it is mentioned in the background that the screening efficiency is low due to the little change in the speed of the existing vibrating screen during the reciprocating sliding process. In order to solve this problem, this scheme sets the drive crank and the secondary vibrating screen in the transmission mechanism. The two cranks are connected by a connecting rod. When the connecting rod of the driving crank rotates at a uniform angular velocity under the drive of the power mechanism, the free end of the connecting rod of the driven crank also rotates under the drive of the connecting rod. , but because the center of gyration is different, when the free end of the connecting rod driving the crank is close to the center of gyration of the driven crank, the angular velocity of the free end of the connecting rod of the driven crank will increase, on the contrary when the free end of the connecting rod driving the crank When away from the center of rotation of the driven crank, the angular velocity of the free end of the connecting rod of the driven crank will slow down, due to the existence of the transmission connecting rod, and at the same time, due to the sliding connection of the screen frame to the frame, it is connected with the free end of the connecting rod of the driven crank The transmission connecting rod will convert the change of the angular velocity into the change of the linear velocity of the screen frame. In summary, this scheme realizes the function of making the speed change larger in the linear reciprocating motion of the screen frame.

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