阅读说明：本技术 一种建筑施工用砂石精细筛选方法 (Fine screening method for sandstone for building construction ) 是由 杜艳阳 于 2019-10-30 设计创作，主要内容包括：本发明公开了一种建筑施工用砂石精细筛选方法,具体涉及建筑施工原料领域,包括工作台,所述工作台顶部从左至右依次设有细砂仓、中砂仓和粗砂仓,所述细砂仓、中砂仓和粗砂仓底部均设有蓄料空腔,所述细砂仓、中砂仓和粗砂仓与蓄料空腔之间设有下料通道,所述细砂仓一侧设有加速辊,所述加速辊一端设有传动电机；所述筛选方法具体包括如下步骤：步骤一：经送料传送带的传动将砂石原料运输至加速辊位置,由加速辊的转动加速,不同颗粒大小的砂石分别沿不同抛物线,对应掉落至细砂仓、中砂仓和粗砂仓内。本发明通过加速辊的高速旋转,将砂石原料进行筛分,此外将一轮料进行步骤一和步骤二的过程,可使细砂筛分更加充分,保证了细砂的供给量。(The invention discloses a fine screening method for sand and stone for building construction, and particularly relates to the field of building construction raw materials, which comprises a workbench, wherein a fine sand cabin, a middle sand cabin and a coarse sand cabin are sequentially arranged at the top of the workbench from left to right; the screening method specifically comprises the following steps: the method comprises the following steps: the sandstone raw materials are conveyed to the position of the accelerating roller through the transmission of the feeding conveyor belt, the acceleration roller rotates to accelerate, and the sandstone with different particle sizes correspondingly falls into the fine sand bin, the medium sand bin and the coarse sand bin along different parabolas respectively. According to the invention, the sandstone raw material is screened by the high-speed rotation of the accelerating roller, and in addition, the process of the step one and the step two is carried out on the material in the step one, so that the fine sand can be screened more fully, and the supply amount of the fine sand is ensured.)

1. A fine screening method of sand for building construction comprises a workbench (1), and is characterized in that: the top of the workbench (1) is sequentially provided with a fine sand bin (11), a medium sand bin (12) and a coarse sand bin (13) from left to right, the bottoms of the fine sand bin (11), the medium sand bin (12) and the coarse sand bin (13) are respectively provided with a material storage cavity (14), a blanking channel (15) is arranged between the fine sand bin (11), the medium sand bin (12) and the coarse sand bin (13) and the material storage cavity (14), one side of the fine sand bin (11) is provided with an accelerating roller (16), one end of the accelerating roller (16) is provided with a transmission motor (17), a sand return channel (18) is arranged at the joint of the workbench (1) and the accelerating roller (16), and the inner wall of the sand return channel (18) is fixedly provided with a row brush (19);

the top of one end, far away from the sand return channel (18), of the workbench (1) is provided with a shielding piece (2), the shielding piece (2) comprises a shielding plate (21) and a protective pad (22), the bottom end of the shielding plate (21) is fixedly connected with the workbench (1), and the protective pad (22) is fixedly connected with the shielding plate (21);

a feed-back conveyor belt (31) is arranged at the bottom end of the sand return channel (18), and a feeding conveyor belt (32) is arranged at one end of the feed-back conveyor belt (31);

the screening method specifically comprises the following steps:

the method comprises the following steps: the sandstone raw materials are conveyed to the position of an accelerating roller (16) through the transmission of a feeding conveyor belt (32), the acceleration is realized through the rotation of the accelerating roller (16), and the sandstone with different particle sizes correspondingly falls into a fine sand bin (11), a middle sand bin (12) and a coarse sand bin (13) along different parabolas;

step two: the corresponding granular sand and stones falling into the fine sand bin (11), the middle sand bin (12) and the coarse sand bin (13) fall into the material storage cavity (14) through the blanking channel (15) for storage;

step three: the sand and gravel with overlarge particles can fall back to the interior of the coarse sand bin (13) under the shielding of the shielding plate (21);

step four: the transmission motor (17) drives the acceleration roller (16) to continue rotating, the row brush (19) can brush down the sand stuck on the surface of the acceleration roller (16), the sand falls to the position of the return conveyor belt (31) through the sand return channel (18), and then the feeding conveyor belt (32) feeds materials;

step five: and (3) taking out the screening materials of one round in the material storage cavity (14) corresponding to the fine sand bin (11), the medium sand bin (12) and the coarse sand bin (13) in sequence, and repeating the processes of the first step and the second step again.

2. The fine screening method of the sand for building construction according to claim 1, characterized in that: the automatic feeding device is characterized in that the transmission motor (17) is fixedly connected with the workbench (1), an output shaft of the transmission motor (17) is fixedly connected with one end of the accelerating roller (16), and a rotating bearing is arranged at the joint of the other end of the accelerating roller (16) and the workbench (1).

3. The fine screening method of the sand for building construction according to claim 1, characterized in that: the rotating speed of the transmission motor (17) is set to 750-.

4. The fine screening method of the sand for building construction according to claim 1, characterized in that: the feeding conveyor belt (32) is obliquely arranged, and the top height of the feeding conveyor belt (32) is arranged corresponding to the position of the accelerating roller (16).

5. The fine screening method of the sand for building construction according to claim 1, characterized in that: the fine sand silo (11), the medium sand silo (12) and the coarse sand silo (13) are arranged in a descending mode in terms of top opening size, the discharging channel (15) penetrates through the workbench (1) and is connected with the material storage cavity (14), and the section shape of the discharging channel (15) is arranged to be inverted trapezoid.

6. The fine screening method of the sand for building construction according to claim 1, characterized in that: the cross-sectional shape of the shielding plate (21) is set to be U-shaped, the shielding plate (21) is matched with the coarse sand bin (13), and the protective pad (22) is made of rubber materials.

7. The fine screening method of the sand for building construction according to claim 1, characterized in that: arrange brush (19) length and acceleration roller (16) looks adaptation, arrange brush (19) one side and fixedly establish a plurality of brush hairs, the brush hair is kept away from row brush (19) one end and is laminated with acceleration roller (16) outer wall.

8. The fine screening method of the sand for building construction according to claim 1, characterized in that: the blanking channel (15) is obliquely arranged, the bottom end of the blanking channel (15) is arranged corresponding to one end of the feed back conveyor belt (31), and the top end of the blanking channel (15) is arranged corresponding to the position of the row brush (19).

Technical Field

The invention relates to the technical field of building construction raw materials, in particular to a fine screening method of sand stones for building construction.

Background

Sand, which refers to a loose mixture of sand and gravel. Geologically, mineral or rock particles with a particle size of 0.074-2mm are called sand, and those with a particle size greater than 2mm are called gravel or cobbles. Different gravels have larger structure difference, some gravels have uniform particle size and some gravels have different sizes, and the grinding roundness of the crumbs in some gravels is good and the edges and corners of the crumbs in some gravels are bright. Sand is a loose material, but its particles are generally hard and chemically stable in the surface environment. Sandstone generally has stronger weather resistance, and particularly, siliconized quartz sandstone has hardness higher than granite. Rocks in nature are broken and separated into particles with different sizes under the actions of weathering, denudation and other earth surfaces. These particles are transported and accumulated by water, wind, glacier, and the like to form a sandstone layer. The sandstone layers formed before the fourth era (up to 200 and 300 ten thousand years ago) basically form rocks, namely various sandstone, conglomerate and the like. None of the rock formed during the quaternary period is consolidated, i.e., various sand gravel, gravel sand, etc., or quaternary loose deposits. Naturally occurring sand, also known as natural sand. Because of its good hardness and stable chemical properties, sandstone is often used as a high-quality building material and concrete raw material and is widely applied in the fields of houses, roads, highways, railways, engineering and the like.

During the actual use process of building construction, the sand can be divided into coarse sand, medium sand and fine sand according to the particle size of the sand; coarse sand: the content of gravel particles in the sand is not more than 25 percent, and the content of sand particles with the particle size of more than 0.5 mm exceeds 50 percent of the total mass; medium sand: fine aggregate with the particle size of more than 0.25mm, the mass of the particles is more than 50 percent of the total mass, and the fineness modulus is 3.0-2.3; fine sand: the sand composed of fine particles is sand composed of particles with diameters of 0.1-0.25 mm, and in practical use of building construction: coarse sand and medium sand are used for concrete, and fine sand is used for plastering and pointing.

However, the existing sandstone raw materials are mostly sieved by manpower or a stone sieving machine, wherein the manual sieving work efficiency is low, and the demand of the construction site on sandstone cannot be met; when the stone screening machine is used, large gravel in the gravel can be screened out, coarse, medium and fine screening can be completed, but coarse sand or medium sand screened out in actual use still contains a large amount of fine sand, so that the amount of fine sand is reduced, and the supply amount of fine sand cannot be ensured.

Disclosure of Invention

In order to overcome the defects in the prior art, the embodiment of the invention provides a method for finely screening sand for building construction, which screens sand raw materials by accelerating high-speed rotation of a roller, replaces the traditional manual screening mode, and can ensure the supply amount of fine sand.

In order to achieve the purpose, the invention provides the following technical scheme: a fine screening method for sand and stone for building construction comprises a workbench, wherein a fine sand cabin, a middle sand cabin and a coarse sand cabin are sequentially arranged at the top of the workbench from left to right, material storage cavities are formed in the bottoms of the fine sand cabin, the middle sand cabin and the coarse sand cabin, blanking channels are arranged among the fine sand cabin, the middle sand cabin, the coarse sand cabin and the material storage cavities, an accelerating roller is arranged on one side of the fine sand cabin, a transmission motor is arranged at one end of the accelerating roller, a sand return channel is arranged at the joint of the workbench and the accelerating roller, and a row brush is fixedly arranged on the inner wall of the sand return channel;

the top of one end, far away from the sand return channel, of the workbench is provided with a shielding piece, the shielding piece comprises a shielding plate and a protective pad, the bottom end of the shielding plate is fixedly connected with the workbench, and the protective pad is fixedly connected with the shielding plate;

a feed-back conveyor belt is arranged at the bottom end of the sand return channel, and a feeding conveyor belt is arranged at one end of the feed-back conveyor belt;

the screening method specifically comprises the following steps:

the method comprises the following steps: the sand and stone raw materials are conveyed to the position of an accelerating roller through the transmission of a feeding conveyor belt, the rotation of the accelerating roller is accelerated, and sand and stones with different particle sizes correspondingly fall into a fine sand bin, a medium sand bin and a coarse sand bin along different parabolas;

step two: the corresponding granular gravels falling into the fine sand bin, the middle sand bin and the coarse sand bin fall into the material storage cavity through the blanking channel for storage;

step three: the oversize gravel/gravel particles can fall back into the coarse sand bin under the shielding of the shielding plate;

step four: the driving motor drives the accelerating roller to continue rotating, the row brush can brush down the sand stuck on the surface of the accelerating roller, the sand falls to the position of the feed back conveying belt through the sand return channel, and then the feeding is carried out from the feeding conveying belt;

step five: and (4) taking out the screening materials of one round in the material storage cavities corresponding to the fine sand bin, the medium sand bin and the coarse sand bin in sequence, and repeating the processes of the first step and the second step again.

In a preferred embodiment, the transmission motor is fixedly connected with the workbench, an output shaft of the transmission motor is fixedly connected with one end of the acceleration roller, and a rotating bearing is arranged at the joint of the other end of the acceleration roller and the workbench.

In a preferred embodiment, the transmission motor speed is set to 750-.

In a preferred embodiment, the feeding conveyor belt is arranged obliquely, and the top height of the feeding conveyor belt is arranged corresponding to the position of the accelerating roller.

In a preferred embodiment, the sizes of the openings at the top ends of the fine sand bin, the middle sand bin and the coarse sand bin are gradually decreased, the blanking channel penetrates through the workbench to be connected with the material storage cavity, and the cross section of the blanking channel is in an inverted trapezoid shape.

In a preferred embodiment, the cross-sectional shape of the shielding plate is provided in a shape of a "U", the shielding plate is adapted to the coarse sand silo, and the protective pad is made of a rubber material.

In a preferred embodiment, the length of the row brush is matched with that of the accelerating roller, a plurality of bristles are fixedly arranged on one side of the row brush, and one end, far away from the row brush, of each bristle is attached to the outer wall of the accelerating roller.

In a preferred embodiment, the blanking channel is obliquely arranged, the bottom end of the blanking channel is arranged corresponding to one end of the feed back conveyor belt, and the top end of the blanking channel is arranged corresponding to the position of the row brush.

The invention has the technical effects and advantages that:

1. according to the invention, through the high-speed rotation of the accelerating roller, the inertia motion caused by the coarse sand, the medium sand and the fine sand in the sand and stone raw materials falling from the feeding conveyor belt according to different self weights can be respectively carried out along the shear line direction of the accelerating roller in the running directions of a parabola 1 (marked by F1 in the attached drawing 1), a parabola 2 (marked by F2 in the attached drawing 1) and a parabola 3 (marked by F3 in the attached drawing 1), and if the coarse sand contains large granular gravel, the running track of the parabola 3 is exceeded, the coarse sand can be shielded by the shielding plate, and the rubber-material protective pad is used for buffering the stress relief, so that the coarse sand can smoothly fall back into the coarse sand bin, the safety accident of personnel is avoided, in addition, the coarse sand, the medium sand and fine sand are obtained in a round, and the process of the step one and the step two is carried out, so that the fine sand can be screened more fully, and the supply;

2. according to the invention, the outer wall of the accelerating roller is cleaned through the row brush, so that materials adhered to the surface of the accelerating roller can be effectively brushed down to the feed-back conveyor belt and conveyed again through the feed conveyor belt, the waste of raw materials and the cleanliness of the accelerating roller are avoided, and the service life of the device is maintained.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a top view of the table of the present invention.

FIG. 3 is an enlarged view of portion A of FIG. 1 according to the present invention.

Fig. 4 is a schematic view of the construction of the shield of the present invention.

The reference signs are: 1 workbench, 11 fine sand bin, 12 middle sand bin, 13 coarse sand bin, 14 material storage cavity, 15 blanking channel, 16 accelerating roller, 17 driving motor, 18 sand return channel, 19 row brush, 2 shielding piece, 21 shielding plate, 22 protective pad, 31 material return conveyor belt and 32 material feeding conveyor belt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.