Rotary jitter-type sand and gravel screening device

Abstract

The invention discloses a rotary jitter-type sand and gravel screening device. An output shaft of a driving motor is connected with the top of a connecting rod, and the bottom of the connecting rod extends downwards; a through groove is formed in a sleeve, one end of a first connecting rod is hinged to a movable block while the other end of the first connecting rod is hinged to a second connectingrod; one end of the second connecting rod is hinged to a fixed sleeve; a first reset elastic body is assembled to ensure that the other end of the second connecting rod is accommodated in the fixed sleeve; a screw shell is rotated downwards to drive the movable block to be slid downwards so as to ensure that the other end of the second connecting rod extends out of the through groove; a screen mesh is connected with a sleeve; and a chassis is arranged on the screen mesh and the screen mesh structure can be rotated relative to the chassis; a lifting mechanism is positioned under the chassis, and synchronous motion of the lifting mechanism and the connecting rod is carried out, and the lifting mechanism is moved up and down so as to drive the chassis to do up-down reciprocating motion. Therotary jitter-type sand and gravel screening device disclosed by the invention has the advantage of high screening efficiency.

Description

technical field [0001] The invention relates to the technical field of sand and gravel screening in construction engineering, in particular to a rotary shaking type sand and gravel screening device. Background technique [0002] The screening device in the prior art, such as a shaking type drug processing and screening device disclosed in the 201811421984.5 application, uses a telescopic support rod to elastically support the screen plate with a spring, and continuously shakes the screen plate, that is, through the linear reciprocating motion of the screen plate to achieve sieving. Another example is a sieving device in the production process of florfenicol powder disclosed in patent application 201721885664.6, which uses a telescopic rod to drive the sieve plate to vibrate up and down inside the feed box, so as to achieve preliminary sieving of powdered florfenicol powder point. Another example is a sieve body hanging combination device disclosed in patent application 201...

AI Technical Summary

Problems solved by technology

[0003] The screening devices of the above-mentioned prior art generally have the following technical problems: First, the movement track of the screen plate is single, or it is of the type of shaking up and down or the type of horizontal swing, resulting in a single relative movement of the material during sieving, and the efficiency of the screening material needs to be improved. ; Second, the structure of the screen plate of the prior art is mostly a planar structure, that is, there are only mesh holes that are conducted up and down, and then cooperate with the reciprocating linear motion of this shaking type or swing type of the prior art, resulting in the When sieving, its feeding point only exists at the bottom of the sieve, the space utilization rate of the sieve is low, and the efficiency of the sieve needs to be improved; third, in addition to the above-mentioned technical problems, the screen plate of the plane structure has Lack of barriers on the side, resulting in material leakage during the screening process

Or directly piled up on the construction site. When construction is required, it is necessary to carry out secondary loading and transportation of sand, which is time-consuming and labor-intensive; if a transfer trolley is used to pick up materials, it will cause the transfer trolley to pick up materials for a long time, which will delay the construction time; If the sieved sand is dumped in the prior art carrying device of the prior art, and then carried out centralized delivery to the transfer trolley through the carrying device, it is necessary to monitor in real time whether the carrying device is fully loaded; The sand is mostly used for concrete mixing, and the proportion range of sand in each square concrete is fixed, and the loading device is used for centralized conveying, and secondary weighing is required

In summary, the screening device in the prior art still needs to be improved in connection between screening and subsequent processes.

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