According to the different ways of using air, the specific gravity stone removal machine is mainly divided into several categories such as suction type, blowing type and circulating air. Specifically, it includes a suction-type specific gravity grading stone removal machine with a double-layer screen surface, a suction-type double-screen specific gravity stone removal machine with a double-screen stone removal screen surface, and a double-screen surface suction machine with a crushing (coarse crushing, small crushing, etc.) screen surface. Type specific gravity stone removal machine (such as grain roughness cleaning stone removal machine, etc.), suction and blowing type screening and stone removal combination machine with large, medium and small impurities screen surface, and circulating air specific gravity stone removal machine with single-layer screen surface Machine, double-layer screen surface circulating air specific gravity grading stone removal machine, circulating air combined cleaning machine, etc.
Blowing Specific Gravity Stoner
Because the blow-type specific gravity stoner works under positive pressure, it is easy to generate dust, which has a certain impact on the environmental sanitation of the workshop. If operated properly, in the paddy cleaning process section, the stone removal effect is comparable to that of the suction specific gravity stoner; but in other process sections after the cleaning process, the stone removal effect of the blowing specific gravity stoner is not as good as that of the suction specific gravity stoner. Destoner.
Because the air flows in a closed loop in the machine and is reused repeatedly, basically no dust is raised, which will not affect the environmental sanitation of the workshop, and accordingly can save dust removal facilities, wind nets and their occupied space. However, it is required that the particle size of the granular material entering the circulating air specific gravity destoner is basically the same, and there is basically no light impurities, small impurities, etc. in the material, otherwise, the filter screen and the stone removal screen surface are easily blocked. Therefore, the scope of use of the circulating air specific gravity destoner has certain limitations
(1) Before starting the machine, check whether there are foreign objects on the screen surface and the fan, whether the fasteners are loose, and turn the pulley by hand. If there is no abnormal sound, it can be started.
(2) During normal operation, the feed of the stone remover should keep falling continuously and evenly along the width of the screen surface. The flow adjustment should be based on the rated output, and the flow should not be too large or too small. The thickness of the material layer should be appropriate, and the airflow will not penetrate the material layer, but also make the material in a suspended or semi-suspended state. When the flow rate is too large, the material layer on the working surface is too thick, which will increase the resistance of the airflow penetrating the material layer, so that the material cannot reach the semi-suspended state and reduce the stone removal effect; if the flow rate is too small, the material layer on the working surface is too thin, It is easy to be blown through by the airflow, and the automatic stratification of the material on the upper layer and the stone on the bottom layer will be destroyed, thus reducing the stone removal effect.
(3) When the stone removal machine is working, there should be proper grain storage in the bucket to prevent the material from directly hitting the screen surface and affect the suspension state, thereby reducing the stone removal efficiency.
(4) In order to avoid the phenomenon of uneven distribution of airflow due to the failure of the material to cover the working surface when the machine is just started, a layer of material should be covered on the working surface in advance. During normal operation, it should be ensured that the blanking distribution in the width direction of the working face is uniform.
(5) The air volume adjustment of the stone removal machine is based on the observation of the movement state of the material on the working surface and the quality of the material at the outlet. If the material is turned violently, it means that the air volume is too large; if the material is not loose and floating enough, it means that the air volume is too small. At this time, there are still stones in the outlet material, and the damper should be adjusted in time to achieve a suitable air volume.
(6) The suitable inclination angle of the working face of the stone removal machine should be between 10° and 13°. If the inclination angle is too large, the resistance to the upward movement of the stone will increase, and the speed into the selection chamber will be too slow, making it difficult to discharge the stone. If the inclination angle is too large, the downward flow rate of the material will also increase, and the side-by-side stones are easily mixed with the grains and excluded from the machine together, resulting in unclean stone removal. If the inclination angle is too small, the opposite will occur, and the material will be more difficult to discharge, which not only affects the work efficiency, but also increases the grain content in the stone. Therefore, the inclination of the working face should be kept within an appropriate range and adjusted according to the amount of stone contained in the raw grain. When the raw grain contains more stones, the inclination angle can be appropriately reduced, otherwise, it can be appropriately increased. And according to the situation that the net grain contains stones and the stones contain grains, it is judged whether the adjustment of the inclination angle is correct.
(7) The de-stone sieve plate, the air equalizing plate and the air inlet door should keep the air flow unobstructed. If the sieve hole is blocked, it can be cleaned with a wire brush. Do not knock it hard to keep the sieve plate flat. If the sieve plate is worn, it should be replaced in time, and the double-sided raised sieve plate can be turned over for use.(8) The stone removal machine should be placed behind the screening and airflow cleaning in the sorting and cleaning operation to remove the side-by-side stones that cannot be removed by the previous cleaning process. If there are large and small impurities entering the cleaning and stone removal machine, it will affect the uniform feeding, block the pores, and reduce the stone removal efficiency.
(9) Regularly check the stone content in the grain and the grain content in the stone, and find out the reason in time when abnormal situation is found, and take corresponding measures.
(10) The stone removal machine should be regularly overhauled, and the bearings should be regularly cleaned and lubricated. After the maintenance, the empty car must be tested first to check whether the machine works normally and whether the steering is correct. After everything is normal, the material can be put into operation
Post time: Nov-04-2022
