Secondary gravel screening device

Abstract

The invention discloses a secondary gravel screening device which comprises a base plate. A supporting frame is vertically and fixedly installed on the base plate. A drive motor is fixedly installed at the left side of the supporting frame. The right side wall of the supporting frame is provided with a driven bevel gear in meshing connection with a driving bevel gear in a rotary mode. A feeding pipe is arranged at the upper end of a screening box. A horizontal plate is horizontally and fixedly installed on the outer wall of the right side of the screening box. A stepping motor is fixedly installed on the horizontal plate. A driven gear in meshing connection with a driving gear is fixedly installed at the upper end of a rotating shaft. According to the secondary gravel screening device, gravel can be scattered in a rotating mode through rotation of blades and a shifting plate with through holes, the scattering degree of the gravel before screening is increased, and the gravel screeningefficiency is improved. A second sieve plate and a first sieve plate make left-right reciprocating motion under the driving action of a second connecting rod and a first connecting rod correspondingly, the fast screening effect on the gravel is achieved, the gravel, obtained after passing the second sieve plate and the first sieve plate, of different grain diameters enters a collecting groove to be collected, and discharging is convenient and rapid.

Description

technical field [0001] The invention relates to the technical field of building construction machinery, in particular to a secondary screening device for sand and gravel. Background technique [0002] Building construction refers to the production activities in the implementation stage of engineering construction. It is the construction process of various buildings. It can also be said to be the process of turning various lines on the design drawings into real objects at designated locations. It includes basic engineering construction, main structure construction, roofing engineering construction, decoration engineering construction, etc. The place where the construction works is called "construction site" or "construction site", also called construction site. [0003] In the process of building construction, raw materials such as sand are needed. Construction sites usually purchase sand in large quantities, but the quality of the current sand is uneven, and there are some ...

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Problems solved by technology

[0003] In the process of building construction, raw materials such as sand are needed. Construction sites usually purchase sand in large quantities, but the quality of the current sand is uneven, and there are some large stones, branches and other debris in it. The existence of these debris It seriously affects the quality of house construction

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