CN115430608B

CN115430608B - Grit raw materials fine screen device

Info

Publication number: CN115430608B
Application number: CN202211404240.9A
Authority: CN
Inventors: 王保城; 孟祥锋; 卢继英
Original assignee: Shandong Century Xinfeng Construction Technology Co ltd
Current assignee: Shandong Century Xinfeng Construction Technology Co ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-03-10
Anticipated expiration: 2042-11-10
Also published as: CN115430608A

Abstract

The invention discloses a fine screening device for sandstone raw materials, and mainly relates to the field of building materials. The novel rotary cylinder is characterized by comprising a base, wherein a rotary cylinder is connected to the base in a rotating mode, the rotary cylinder is in a horn mouth shape with the large upper part and the small lower part, a gap is formed in the side wall of the rotary cylinder, a recovery box connected with the rotary cylinder in a rotating mode is sleeved outside the rotary cylinder, the bottom of the recovery box is fixedly installed on the base, the recovery box is sleeved with the outer wall of the rotary cylinder in a sealing mode, the recovery box covers the gap area, an air suction opening is formed in the recovery box, a negative-pressure air suction air source is connected to the air suction opening, a material receiving box is arranged on the top cover of the rotary cylinder in a covering mode, the bottom of the material receiving box is sleeved with the top of the recovery box in a sealing mode, a material discharging channel is arranged on one side of the material receiving box, and a discharging pipe penetrating through the material receiving box is arranged in the rotary cylinder. The invention has the beneficial effects that: it can quickly separate the soil or stone powder mixed in the sand.

Description

Grit raw materials fine screen device

Technical Field

The invention relates to the field of building materials, in particular to a fine screening device for a sandstone raw material.

Background

Concrete and mortar are the most important and largest building consumables, and have decisive influence on the construction quality. In terms of raw materials, a large amount of sand is needed. The sandstone is generally used as a filler and is mixed in concrete or mortar, so that the consumption is large. The quality of the sandstone, which is an important component of concrete structural materials, has a significant influence on the quality and durability of the whole project.

The main sources of sand include natural sand and machine-made sand. In general, if natural conditions permit, river sand is preferably used, which is taken from the river bed, has a smooth surface and is mostly spherical, so that only a small amount of binding material and a small amount of mixing water are needed in the curing process, and concrete, mortar and dry-mixed mortar products with excellent quality can be obtained. However, river sand has limited resources and higher processing cost (mainly the energy and cost in the drying stage account for higher ratio), so on the premise of meeting the performance index of sand, an economic and feasible scheme is selected, the construction quality requirement is met, and the production cost is effectively controlled, so that the concrete construction production by using the machine-made sand is feasible and the comprehensive benefit is obvious in the areas lacking natural sand resources. Therefore, the sandstone from two sources is commonly used in building materials.

The properties of the two are different based on their source and processing method. The mechanical sand contains a large amount of stone powder, and the natural sand contains mud, and the respective contents are difficult to ignore. The mud content of the natural sand is that the grain diameter is less than 0.075mm, the natural sand is composed of sticky grains with viscosity, the plasticity index is large, and the connection effect with the crystalline stone after cement hydration is not realized, so the mud content of the natural sand directly influences the concrete strength. Although the sand washing process is adopted in the processing, the mud removing effect cannot be completely achieved by batch and quick sand washing due to high viscosity of the mud, and a large amount of mud is adhered to the surface of the natural sand serving as the raw material. For high-quality concrete products or dry-mixed mortar products, the problem of sand-containing sand is a restriction factor influencing the quality improvement. The mechanical sand has high stone powder content, and although the existence of the stone powder does not cause direct damage to the quality, the mechanical sand has high soil content and large content instability difference, so that the proportioning precision of the mechanical sand as a raw material is influenced. Therefore, the stone powder needs to be sieved.

Disclosure of Invention

The invention aims to provide a sand and stone raw material fine screening device which can quickly separate soil or stone powder doped in sand and stone, has good separation effect and is beneficial to improving the quality of building material products or building main bodies.

In order to achieve the purpose, the invention is realized by the following technical scheme:

the utility model provides a grit raw materials fine screening device, includes the base, it is connected with the commentaries on classics jar to rotate on the base, change the jar and be big-end-up's horn mouth shape, be equipped with the gap on the lateral wall of commentaries on classics jar, change the jar outside and cup joint rather than the collection box who rotates the connection, the bottom and the base fixed mounting of collection box, the collection box cup joints just with changeing the sealed of jar outer wall the collection box covers the gap region, be equipped with the extraction opening on the collection box, connect negative pressure convulsions wind regime on the extraction opening, the top cover of changeing the jar is equipped with and connects the workbin, the sealed top of cup jointing at the recovery box in bottom that connects the workbin, the one side that connects the workbin is equipped with discharging channel, be equipped with the unloading pipe that runs through and connect the workbin in changeing the jar.

The box bottom is an inclined structure, and the discharge channel is arranged on the lowest side of the box bottom.

The utility model discloses a motor-driven rotary table, including base, support frame, collection box, central pivot, the middle part of base rotates and installs central pivot, the top of central pivot is connected with the bottom of changeing the jar, central pivot is based on motor drive, annular array has a plurality of support frames on the base, the vertical setting of support frame just along central pivot evenly distributed, the top of support frame is equipped with rather than fixed mounting's L type bracket, L type bracket and collection box fixed connection.

The recycling box is a ring-shaped piece and comprises an annular wall located on the outer side, an annular bottom plate which is fixedly connected with the annular wall in an integrally formed mode is arranged on the bottom side of the annular wall, and the circumferential side edge of the outer ring of the annular bottom plate is fixed with the side edge of the bottom side of the annular wall in an integrally formed mode.

The rotary cylinder comprises a cylinder bottom, a cylinder wall and a cylinder edge which are sequentially connected from bottom to top; the cylinder bottom is conical, the cylinder wall is an inclined cylinder wall which inclines outwards from bottom to top, the gap is formed in the cylinder wall, the cylinder edge is also an annular piece, and the inner ring side edge of the cylinder edge is higher than the outer ring side edge, so that the cylinder edge is a slope surface which inclines downwards from inside to outside.

The material receiving box comprises a box bottom and a box body, the box bottom is an annular box bottom, the side edge of the inner ring of the box bottom is hermetically fixed at the top of the outer wall of the recovery box, the box bottom is positioned below the cylinder edge, and a sleeve for enabling the blanking pipe to penetrate through and be fixed is arranged on the box body.

The side edge of the outer ring of the cylinder edge is provided with a mounting ring extending downwards, the side edge of the inner ring of the cylinder edge is fixedly connected with the top side of the cylinder wall, the mounting ring is in rotary sealing connection with the top side of the annular wall through a bearing, and the outer wall of the bottom of the cylinder wall is in rotary sealing connection with the side edge of the inner ring of the annular bottom plate through a bearing piece.

The material distribution device comprises a rotary cylinder, and is characterized in that a material distribution cone is arranged at the bottom of the rotary cylinder, the material distribution cone is a cone, the large end of the material distribution cone is fixed at the center of the bottom of the rotary cylinder, driving sheets are arranged on the periphery of the material distribution cone, the driving sheets are fixedly connected with the bottom of the rotary cylinder and the inner side of the cylinder wall, the extending direction of the driving sheets is matched with the curved surface of the bottom of the rotary cylinder, the inner ends of the driving sheets are connected with the conical surface of the material distribution cone, the outer ends of the driving sheets are located in the middle of the cylinder wall, and the bottom of a discharging pipe is provided with a pipe orifice which is located above the material distribution cone.

The inner side surface of the cylinder wall is provided with raised grains.

Compared with the prior art, the invention has the beneficial effects that:

the equipment can be used for mud and powder removal operation before primary material mixing of medium sand and coarse sand, continuous blanking is carried out through the blanking pipe, sand and stone are continuously and continuously rotated and thrown out through rotation of the rotary cylinder, negative pressure is formed in the recovery box, and stone powder or soil is pumped away in a gap. The process is coherent and efficient, the soil and the powder are removed thoroughly, the subsequent drying procedure is not needed, and the process cost is reduced.

In the process that the sand material rotates upwards, the sand material rolls tightly against the cylinder wall based on centrifugal force, so that soil attached to the sand material is favorably pumped out, and the surface area of the cylinder wall is increased along with the upward movement due to the fact that the cylinder wall is of a bell-mouth structure, so that the sand material is further dispersed in upward rotation, and the separation of mixed powder is more favorably realized; and the rolling of the gravel can also effectively promote the falling of the adhered soil or stone powder and the gravel, so that the separation effect is improved.

Drawings

FIG. 1 is a schematic of the present invention.

Fig. 2 is a bottom perspective schematic view of the present invention.

Fig. 3 is a schematic illustration of the assembly of the present invention with the blanking tube omitted.

Fig. 4 is a sectional view of the internal structure of the present invention.

Fig. 5 is a schematic view of the internal structure of the upper assembly half of fig. 4 according to the present invention.

Figure 6 is a side view of the present invention.

Figure 7 is a schematic view of a rotary cylinder of the present invention.

Reference numerals shown in the drawings:

1. a base; 2. a central rotating shaft; 3. a driven pulley; 4. a drive pulley; 5. a motor; 6. a support frame; 7. a bracket; 8. a recycling bin; 9. an annular wall; 10. an annular base plate; 11. an air extraction opening; 12. rotating the cylinder; 13. a cylinder bottom; 14. a cylinder wall; 15. a cylinder edge; 16. a gap; 17. a material distribution cone; 18. a driving plate; 19. installing a ring; 20. a discharging pipe; 21. a material receiving box; 22. a sleeve; 23. a discharge passage.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention can be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope defined by the present application.

The instruments, reagents, materials and the like used in the following examples are conventional instruments, reagents, materials and the like in the prior art and are commercially available in a normal manner unless otherwise specified. Unless otherwise specified, the experimental methods, detection methods, and the like in the following examples are all conventional experimental methods, detection methods, and the like in the prior art.

Example (b): grit raw materials fine screen device

Including circular base 1, it is more easily stable, for the convenience sees the inner structure, omits the shell of base 1 in the figure, only demonstrates the inner structure. The middle part of base 1 installs central pivot 2, the bottom mounting of central pivot 2 rather than coaxial driven pulley 3, one side fixed mounting of base 1 has motor 5, install driving pulley 4 on the output shaft of motor 5, driven pulley 3 passes through drive belt transmission with driving pulley 4, realizes motor 5 to the drive control of central pivot 2.

Annular array has 3 support frames 6 on the base 1, the vertical setting of support frame 6 just along 2 evenly distributed of central pivot, the top of support frame 6 is equipped with rather than fixed mounting's L type bracket 7, fixed mounting has collection box 8 on the L type bracket 7, collection box 8 is the loop forming element, and the cross-section is the L type, and concrete structure is including the annular wall 9 that is located the outside, annular wall 9 stands vertically to extend and coaxial with central pivot 2, the bottom side of annular wall 9 is equipped with rather than fixed connection integrated into one piece's annular floor 10, annular floor 10 is the annular flat plate structure coaxial with central pivot 2, the structure in L type cross-section is realized to the outer lane circumference side of annular floor 10 and the fixed of the bottom side integrated into one piece of annular wall 9.

The annular wall 9 or the annular bottom plate 10 are provided with the air exhaust port 11, the air exhaust port 11 is connected with a negative pressure air source, in our production, the air exhaust port 11 is directly communicated with a bag-type dust collector or a cyclone dust collector, stone powder or soil can be conveniently recovered, and sufficient negative pressure air exhaust air source is conveniently provided. So that the interior of the recovery box 8 can keep higher negative pressure air draft effect.

A rotary cylinder 12 is fixed at the top end of the central rotating shaft 2, the rotary cylinder 12 is arranged inside the recycling box 8, the rotary cylinder 12 is an integrally formed axisymmetric component, and the rotary cylinder 12 comprises a cylinder bottom 13, a cylinder wall 14 and a cylinder edge 15 which are sequentially connected from bottom to top;

the cylinder bottom 13 is positioned at the bottom of the rotary cylinder 12, so that gravel can move upwards to the cylinder wall 14 along with rotation, the cylinder bottom 13 is conical, the bottom side of the cylinder wall 14 is fixedly connected with the outer circumferential side of the cylinder bottom 13, and an arc-shaped chamfer is arranged at the connection part, so that the sand can rise along with rotation; the cylinder wall 14 is the slope cylinder wall 14 that leans out from bottom to top, so the cylinder wall 14 is big-end-up's round platform shape, be equipped with gap 16 on the cylinder wall 14, the width of gap 16 is less than the particle size of the grit of handling, can set up to the particle size width lower limit that corresponds the middling sand, because it is more to use the middling sand in the building, and sets up this width and also can be generally used to the coarse sand. While fine sand is not commonly used. The gap 16 is positioned inside the recovery box 8 and is communicated with the recovery box 8 in a sealing way, and the mud stone powder mixed in the sand can be extracted through the gap 16.

The sand-blasting machine is characterized in that a material distribution cone 17 is arranged at the bottom 13 of the rotary cylinder 12, the material distribution cone 17 is a cone, the large end of the material distribution cone 17 is fixed at the center of the bottom 13 and is used for uniformly distributing falling sand materials around, a driving sheet 18 is arranged on the peripheral side of the material distribution cone 17, the surface of the driving sheet 18 is a vertical surface, the driving sheet 18 is L-shaped, the outer side of the driving sheet 18 is fixedly connected with the inner side surfaces of the bottom 13 and the cylinder wall 14, the extending direction of the driving sheet 18 is matched with the curved surface of the bottom of the rotary cylinder 12, the inner end of the driving sheet 18 is connected with the conical surface of the material distribution cone 17, the outer end of the driving sheet 18 is arranged above, the outer end of the driving sheet is located in the middle of the cylinder wall 14 and gradually narrows, and the width of the inner end of the driving sheet 18 is larger than that of the outer end. By means of the driving plate 18, sand that has just fallen into the rotating cylinder 12 can be stirred to follow the rotation of the rotating cylinder 12, so that the speed of rotation is rapidly obtained and climbs up the cylinder wall 14 by means of its inertia and centrifugal force.

The cylinder edge 15 is also a ring-shaped member, the inner side of the cylinder edge 15 is higher than the outer side of the cylinder edge 15, so that the cylinder edge 15 is a slope surface inclined downwards from inside to outside, the inner side of the cylinder edge 15 is fixedly connected with the top side of the cylinder wall 14, and the outer side of the cylinder edge 15 is provided with a mounting ring 19 extending downwards.

The mounting ring 19 is connected with the top side of the annular wall 9 in a rotating and sealing mode through a bearing, the outer wall of the bottom of the cylinder wall 14 is connected with the side edge of the inner ring of the annular bottom plate 10 in a rotating and sealing mode through a bearing piece, sealed rotating installation of the side wall of the cylinder body and the recovery box 8 is achieved, the recovery box 8 is static, and the rotating stroke of the rotating cylinder 12 is assisted.

Based on the structure of the rotary cylinder 12, the sand falling into the rotary cylinder 12 can be rapidly rotated, and the sand gradually moves to the upper side of the cylinder wall 14 while rotating at a sufficient speed based on the self weight and inertia of the sand, so that a spiral rising motion track is formed, and finally the sand falls outwards from the top side of the cylinder wall 14 through the inclined cylinder edge 15 and leaves the high-speed rotating body of the rotary cylinder 12.

The grit is naturally paved in the rotatory in-process that rises, expandes between the grit and forms natural cloth effect, and the grit rolls on jar wall 14, can simultaneously set up protruding texture on jar wall 14, can use the pyramid burr arch, perhaps unsmooth texture all can, makes the grit in rotatory in-process that rises, and the grit is strengthened the collision repeatedly and is favorable to making the earth or the mountain flour of adhesion on the grit to drop, at the in-process that the dispersion was paved out and roll shake off earth repeatedly to above-mentioned grit, takes out earth to the collection box 8 in through gap 16, realizes separating earth and grit. Importantly, the separation method does not need washing, and the sand can be separated from stone powder or mud without being dried, so that the subsequent drying is not needed, and the drying link is usually one ring with high energy consumption and high cost specific gravity in the sand preparation and sand selection production, and the cost is greatly reduced without wet sand and drying.

A feeding pipe 20 is arranged in the middle of the rotary cylinder 12, the feeding pipe 20 is used for conveying gravel materials, the top end of the feeding pipe 20 can be connected with various conveying devices for feeding, and a pipe orifice is arranged at the bottom end of the feeding pipe 20 and located above the distribution cone 17.

The mouth of commentaries on classics jar 12 has cup jointed the workbin 21 along the outside, the workbin 21 includes the bottom of the case and box, the bottom of the case is the sealed top of fixing at the recovery box outer wall of the inner circle side of annular bottom of the case and bottom of the case, the bottom of the case is located the below of 15 along the jar, can receive the grit of following 15 throws from the jar, the box is enclosed construction, be equipped with on the box and be used for making unloading pipe 20 run through and fixed sleeve pipe 22, the bottom of the case is slope structure for concentrate the sand material and carry to a direction, be equipped with discharging channel 23 on the box, discharging channel 23 sets up in the lowest one side of the bottom of the case, and the sand material that will detach mountain flour and earth directly sees off.

The operation mode of the equipment is as follows (taking natural sand as an example):

the sand material is sent into a rotary cylinder 12 of the equipment through a discharge pipe 20, a pipe orifice positively impacts a material distribution cone 17, and the sand material is dispersed to a cylinder bottom 13;

the rotary cylinder 12 rotates at a high speed to drive the sand to gradually realize high-speed rotation, and the sand is enabled to spirally go upwards along the cylinder wall 14 by utilizing the self weight and centrifugal potential energy of the sand and combining the inclination of the cylinder wall 14, and finally falls into the material receiving box 21 through the cylinder edge 15;

in the process that the sand material rotates upwards, the sand material rolls tightly against the cylinder wall 14 based on centrifugal force, so that soil attached to the sand material is favorably pumped out, and meanwhile, as the cylinder wall 14 is of a bell-mouth structure, the surface area is increased along with the upward movement, the sand material is further dispersed in upward rotation, and the separation of mixed powder is more favorably realized; and the rolling of the gravel can also effectively promote the falling of the adhered soil or stone powder and the gravel, thereby increasing the separation effect.

By forming negative pressure in the recovery box, stone dust or soil is pumped away in the gap 16, and the recovery box with the negative pressure is concentrated to realize stone dust recovery or soil recovery.

The equipment has wide application prospect and huge economic benefit. The method is applied to a fine screening treatment link of raw materials, mud and powder removing operation is carried out on medium sand and coarse sand before primary mixing, and through practice in production, the improvement on product quality can be obviously achieved. However, the device can also replace the sand washing device in the prior art, is applied to the sand washing links of machine-made sand production and river sand production, breaks through the limitation that the existing sand washing must be dried, realizes soil and powder removal with low cost, is efficient and consistent, and brings structural improvement to the whole sand making production.

Claims

1. A fine screening device for a sandstone raw material is characterized by comprising a base, wherein a rotary cylinder is rotatably connected to the base, the rotary cylinder is in a horn mouth shape with a large top and a small bottom, a gap is formed in the side wall of the rotary cylinder, a recovery box rotatably connected with the rotary cylinder is sleeved outside the rotary cylinder, the bottom of the recovery box is fixedly installed on the base, the recovery box is hermetically sleeved with the outer wall of the rotary cylinder, the recovery box covers the gap area, an air suction opening is formed in the recovery box, a negative-pressure air suction source is connected to the air suction opening, a material receiving box is covered on the top of the rotary cylinder, the bottom of the material receiving box is hermetically sleeved on the top of the recovery box, a discharging channel is arranged on one side of the material receiving box, a discharging pipe penetrating through the material receiving box is arranged in the rotary cylinder, and the rotary cylinder comprises a cylinder bottom, a cylinder wall and a cylinder edge which are sequentially connected from bottom to top; the side edge of the inner ring of the cylinder edge is higher than the side edge of the outer ring, so that the cylinder edge is a slope surface which is inclined downwards from inside to outside, sand materials spirally go upwards along the cylinder wall and finally fall into the material receiving box through the cylinder edge;

the middle part of the base is rotatably provided with a central rotating shaft, the top part of the central rotating shaft is connected with the bottom end of the rotating cylinder, the central rotating shaft is driven by a motor, a plurality of support frames are arranged on the base in an annular array, the support frames are vertically arranged and uniformly distributed along the central rotating shaft, the top ends of the support frames are provided with L-shaped brackets fixedly arranged with the support frames, and the L-shaped brackets are fixedly connected with the recovery box;

the cloth material feeding device is characterized in that a cloth cone is arranged at the bottom of the rotary cylinder, the cloth cone is a cone, the large end of the cloth cone is fixed in the center of the bottom of the rotary cylinder, driving pieces are arranged on the periphery of the cloth cone and fixedly connected with the bottom of the rotary cylinder and the inner side of the wall of the rotary cylinder, the extending direction of the driving pieces is matched with the curved surface of the bottom of the rotary cylinder, the inner end of each driving piece is connected with the conical surface of the cloth cone, the outer end of each driving piece is located in the middle of the wall of the rotary cylinder, and a pipe opening is formed in the bottom end of the discharging pipe and located above the cloth cone.

2. The fine screening device for sandstone raw materials according to claim 1, wherein the bottom of the material receiving box is of an inclined structure, and the discharge channel is arranged on the lowest side of the bottom of the material receiving box.

3. A sand and stone material fine screening device as claimed in claim 1, wherein said recovery box is an annular member including an annular wall on the outside, the bottom side of said annular wall being provided with an annular bottom plate fixedly connected thereto, the peripheral side of said outer ring of said annular bottom plate being fixedly connected to the bottom side of said annular wall.

4. The sand and stone raw material fine screening device as claimed in claim 1, wherein the rotary cylinder comprises a cylinder bottom, a cylinder wall and a cylinder edge which are sequentially connected from bottom to top; the cylinder bottom is conical, the cylinder wall is an inclined cylinder wall which inclines outwards from bottom to top, the gap is formed in the cylinder wall, the cylinder edge is also an annular piece, and the inner ring side edge of the cylinder edge is higher than the outer ring side edge, so that the cylinder edge is a slope surface which inclines downwards from inside to outside.

5. The fine screening device for the sandstone raw material according to claim 1, wherein the material receiving box comprises a box bottom and a box body, the box bottom is an annular box bottom, the inner ring side edge of the box bottom is fixed on the top of the outer wall of the recovery box in a sealing mode, the box bottom is located below the cylinder edge, and a sleeve for enabling the blanking pipe to penetrate through and be fixed is arranged on the box body.

6. A sand and stone raw material fine screening device according to claim 4, characterized in that, the outer ring side of the cylinder rim is provided with a mounting ring extending downwards, the inner ring side of the cylinder rim is fixedly connected with the top side of the cylinder wall, the mounting ring is in rotary sealing connection with the top side of the annular wall through a bearing, and the bottom outer wall of the cylinder wall is in rotary sealing connection with the inner ring side of the annular bottom plate through a bearing piece.

7. A sand and stone raw material fine screening device according to claim 1, characterized in that the inside surface of said cylinder wall is provided with raised grains.