Sand screening device capable of automatically adjusting vibration frequency according to sand accumulation amount

Abstract

The invention relates to the related field of civil engineering, and discloses a sand screening device capable of automatically adjusting the vibration frequency according to the sand accumulation volume. The sand screening device comprises a main box body, a vibration block sliding cavity with an upward opening is formed in the main box body, a sand screening vibration block is connected in the vibration block sliding cavity in a sliding fit mode, a screen cavity with a rightward opening is formed in the sand screening vibration block, and the lower side of the screen cavity communicates with a conical cavity. By means of a cylindrical screen, residual rubble impurities in a sand screening cavity can be reserved in the sand screening cavity to the maximum extent in the sand screening process, the situation that due to vibration, the impurities fall out and are mixed with screened fine sand, and the sand screening quality is reduced is avoided, the rubble impurities can be separated by rotating the screen, manual impurity separation is replaced, and the manpower consumption is reduced; meanwhile, the vibration frequency of the screen can be automatically adjusted according to the sand accumulation amount in the sand screening cavity, so that the situation that due to excessive sand in the sand screening cavity, meshes in the screen are blocked due to sand accumulation, and the sand screening efficiency is affected is avoided.

Description

technical field [0001] The invention relates to the related field of civil engineering, in particular to a sand screening device which can automatically adjust the vibration frequency according to the amount of sand accumulation. Background technique [0002] The sand screening machine is a kind of placer machine that uses screening equipment to separate coarse and fine materials. The current sand screening machines are generally divided into drum type and vibration type. The vibration type sand screening machine mainly relies on equipment vibration to separate sand from coarse However, the coarse stones remaining on the screen during the operation are easily shaken off to the fine sand, thus affecting the quality of sand screening. Moreover, the vibration frequency of the current vibrating sand screening machine is fixed, so it cannot The amount of sand accumulation on the screen is adjusted, so that when the sand accumulation on the screen is too much, the sand screening s...

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Problems solved by technology

[0002] The sand screening machine is a kind of placer machine that uses screening equipment to separate coarse and fine materials. The current sand screening machines are generally divided into drum type and vibration type. The vibration type sand screening machine mainly relies on equipment vibration to separate sand from coarse However, the coarse stones remaining on the screen during the operation are easily shaken off to the fine sand, thus affecting the quality of sand screening. Moreover, the vibration frequency of the current vibrating sand screening machine is fixed, so it cannot The amount of sand accumulation on the screen is adjusted, so that when the sand accumulation on the screen is too much, the sand screening speed will decrease, and the load of the device will increase, which will affect the normal sand screening operation

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