CN212702185U

CN212702185U - Lime stone screening crushing system

Info

Publication number: CN212702185U
Application number: CN202021048609.3U
Authority: CN
Inventors: 王拯民; 金长保
Original assignee: Yangxin Washi Cement Co Ltd
Current assignee: Yangxin Washi Cement Co Ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2021-03-16
Anticipated expiration: 2030-06-09

Abstract

The utility model discloses a broken system of lime stone screening belongs to material screening technical field, specifically includes: feeding device, screening plant and breaker, screening plant's discharge end is just right breaker's pan feeding mouth, screening plant includes a plurality of sieve rollers that are used for carrying the material, syntropy pivoted the surface of sieve roller forms the sifter, and is adjacent clearance between the sieve roller forms the sieve mesh, and along material advancing direction, and is adjacent clearance between the sieve roller increases gradually. The utility model discloses utilize screening plant's sieve mesh to make gradually progressively and wait to sieve qualified thin material in the broken material and pass through the sieve from small to big gradually by the particle diameter, the sawtooth on the sieve roller is mixxed, is cut and is smashed the processing such as moreover to the material, has effectively become flexible the material, avoids sieve mesh department windrow, has eliminated the dead phenomenon of sieve roller card, has improved the screening effect of material.

Description

Lime stone screening crushing system

Technical Field

The utility model relates to a material screening technical field, in particular to broken system of lime stone screening.

Background

Various mineral raw materials of industrial and mining enterprises such as cement plants and the like contain massive, small-particle and powdery materials due to uneven granularity of the obtained raw materials, and unqualified massive materials are required to be crushed into qualified materials when the raw materials are prepared into products. In the prior art, materials are fed into a screening feeder through a bin and are fed to a crusher by a belt conveyor for crushing, so that qualified materials or fine materials enter the crusher for ineffective crushing, and ineffective power consumption is increased; on the other hand, materials often need to enter the crusher repeatedly for multiple times to be crushed repeatedly, and the phenomenon of fine material over-crushing is serious.

Chinese patent No. CN201520700932.7 discloses an ore pre-screening and crushing all-in-one machine, including the tup rotor, adjustable crushing plate, arrange the material grate, the tup rotor, adjustable crushing plate, it all installs on the casing to arrange the material grate, still install 3 at least screening conveying rollers side by side on the casing, the axis of screening conveying roller is parallel to each other and all lies in the coplanar, this plane is parallel with the horizontal plane or slope, the outward flange of the cross section of screening conveying roller is the closed pitch arc of the evagination that is formed by many big curvature radius curves and many little curvature radius curves in proper order alternate connection, big curvature radius curve's curvature radius is greater than little curvature radius curve's curvature radius, and at big curvature radius curve and little curvature radius curve's junction, the tangential direction of the two is unanimous. The material to be crushed and the crushed material are sieved while being conveyed; but the diameters of screening conveying rollers of the device are inconsistent everywhere, so that the gaps between the adjacent screening conveying rollers are in change, large ores easily fall into the gaps when the gaps are increased, and when the gaps are reduced later, the large ores cannot be eliminated, so that the blocking of the screening conveying rollers is caused, the system is stopped, and the screening efficiency is reduced. Secondly, the ore that gets into the screening conveying roller is because the volume is big partially, and weight is heavy partially, and its initial speed is far below the screening conveying roller, and the screening conveying roller makes its speed improve for driving ore speed, and is big with the friction of material, and the result that leads to is exactly the wearing and tearing greatly increased of the screening conveying roller of anterior segment, and the life of screening conveying roller obviously shortens.

SUMMERY OF THE UTILITY MODEL

An it is not enough to above prior art, the utility model aims to provide a broken system of lime stone screening utilizes screening plant's sieve mesh to make gradually increasing to wait to sieve the qualified thin material in the broken material of screening from little to big to pass through the sieve gradually, and the sawtooth on the sieve roller is mixxed, is cut and is smashed the processing such as to the material moreover, has effectively become flexible the material, avoids sieve mesh department windrow, has eliminated the dead phenomenon of sieve roller card, has improved the screening effect of material.

In order to achieve the above object, the present invention is specifically realized by the following techniques:

the utility model provides a lime stone screening crushing system, includes material feeding unit, screening plant and breaker, screening plant's discharge end is just right breaker's pan feeding mouth, screening plant includes a plurality of sieve rollers that are used for carrying the material, syntropy pivoted the surface of sieve roller forms the sifter, and is adjacent clearance between the sieve roller forms the sieve mesh, and follows material advancing direction, and is adjacent clearance between the sieve roller increases gradually.

Adopt above-mentioned technical scheme: after the materials fall into the screening device through the feeding device, the plurality of screen rollers rotate in the same direction to continuously convey the materials forwards, the qualified fine materials which can penetrate through the screen holes directly fall into a material collecting device such as a collecting hopper while the materials are conveyed, and unqualified blocky materials are conveyed into the crushing device to be crushed until the qualified materials fall into the material collecting device; the excessive crushing of the qualified fine materials is avoided, the load of the crushing device is reduced, and the production efficiency is improved. And the aperture of sieve mesh crescent can make the broken material of treating screening pass through the sieve gradually in being radial sieve mesh by little to big, sieves qualified thin material such as miropowder, farine, tiny particle in proper order, and qualified thin material directly falls into material collection device under the sieve, and the material of oversize is cubic material, falls into breaker and carries out the breakage, is favorable to preventing to treat that the screening material is gathering in same sieve mesh department, avoids the sieve mesh to block up, has reduced the dead phenomenon of sieve roller card, and screening efficiency is high.

Furthermore, the surface of the screen roller is provided with sawteeth, and the sawteeth of the adjacent screen rollers are arranged in a staggered manner. Form the sieve mesh between arbitrary two-phase adjacent sawtooth, treat screening broken material cutting, crushing effect through the stirring effect and the pivoted sawtooth of screening broken material, can effectual pine material, make more unobstructed the going forward of material on the sifter, improved the screening effect of material, and avoided the triangle space windrow that forms between two sieve rollers, therefore can not produce and block up, reduced the dead phenomenon of material card.

Furthermore, a plurality of the sieve roller divide into the sieve roller of cloth section and the sieve roller of screening section, the cloth section is close to screening plant's pan feeding end, the screening section is close to screening plant's discharge end.

Further, the rotating speed of the screen roller of the material distribution section is lower than that of the screen roller of the screen section. The material volume of pan feeding end is big partially, and weight is overweight, and speed is low, and the sieve roller is for driving material speed, and must be big with the friction of material, and the result that leads to is exactly the sieve roller degree of wear greatly increased of cloth section, through reducing its speed, realizes accelerating step by step along material advancing direction, can reduce the friction between material and the front end sieve roller, is favorable to prolonging the life of sieve roller. And the rotating speed of the screening roller of the screening section is relatively high, so that the material thickness of the screening section is relatively thin, the screening effect is favorably improved, the rotating speed of the material distribution section is relatively low, the material thickness of the material distribution section is relatively increased, and the uniformity of material distribution of the material distribution section is favorably realized.

Furthermore, the screen surface that the cloth section formed is parallel with the horizontal plane, the contained angle between the screen surface that the sieve section formed and the horizontal direction is 10-30, and the cloth section is used for guaranteeing the material at the screening section evenly distributed, and the screening section that the slope set up is favorable to the material to move ahead, improves the screening effect to the material.

Further, the surface of the screen roller is provided with a wear-resistant layer. The wear resistant layer is made of a wear resistant ceramic, such as a silicon carbide ceramic.

Further, the thickness of the wear-resistant layer decreases progressively along the material advancing direction. Set up the wearing layer, can further strengthen the wear resistance of sieve roller, the wearing layer thickness of cloth section is big moreover, and the wearing layer thickness of sieve segmentation is thin slightly for wear resistance matches with the degree of wear of each position sieve roller, is favorable to improving the life of sieve roller.

Furthermore, a buffer hopper is arranged between the screening device and the crushing device, and the discharge end of the screening device is connected with the feed inlet of the crushing device through the buffer hopper. Through the certain angle of inner wall inclination of buffering hopper, can be to getting into breaker's high-speed cubic material cushions, improve breaker's performance and life.

The utility model has the advantages that:

1. the sieve pore diameter of the sieving device of the utility model is gradually increased, so that the qualified fine materials in the materials to be sieved and crushed can gradually pass through the sieve from small to large, and the blockage caused by excessive accumulated materials at the sieve pores is avoided; secondly, the staggered saw teeth are used for stirring, cutting, crushing and the like on the materials, so that the materials are effectively loosened, the materials can more smoothly move forwards on a screen surface, the screening effect of the materials is improved, and the triangular space stacking at screen holes is further avoided, so that the congestion is avoided, and the phenomenon of the screen roller being stuck is eliminated; the screening efficiency is high.

2. The utility model discloses a reduce the speed of cloth section sieve roller, realize accelerating step by step along material advancing direction, can reduce the friction damage of front end sieve roller and material, be favorable to prolonging the life of sieve roller. And the rotating speed of the screening roller of the screening section is relatively high, so that the material thickness of the screening section is relatively thin, the screening effect is favorably improved, the rotating speed of the material distribution section is relatively low, the material thickness of the material distribution section is relatively increased, and the uniformity of material distribution of the material distribution section is favorably realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a limestone screening and crushing system of embodiment 1;

FIG. 2 is a schematic structural view of the sieving apparatus of example 1;

FIG. 3 is a schematic structural view of a sieving apparatus of example 2;

in the figure, 1, a feeding device; 2. a screening device; 21. a screen roller; 22. screening holes; 23. saw teeth; 24. a material distribution section; 25. screening and segmenting; 3. a crushing device; 4. a buffer hopper; 5. and a wear-resistant layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Example 1

A limestone screening and crushing system is shown in figures 1-2 and comprises a feeding device 1, a screening device 2 and a crushing device 3, wherein the feeding device 1 is used for feeding materials to be screened and crushed to a feeding end of the screening device 2, the materials can be fed by a discharging hopper or an excavator or by a belt or other transmission devices, a discharging end of the screening device 2 is opposite to a feeding port of the crushing device 3, the crushing device 3 is used for collecting and crushing materials on a screen of the screening device 2, and in the embodiment, the crushing device 3 is a hammer crusher. Preferably, be equipped with buffer hopper 4 between screening plant 2 and the breaker 3, screening plant 2's discharge end passes through buffer hopper 4 is connected breaker 3, buffer hopper 4's inner chamber forms the connection screening plant 2 and breaker 3's blanking passageway passes through buffer hopper 4's the certain angle of inner wall inclination, to getting into breaker 3's high-speed cubic material cushions, reduces its speed, prevents that the too big performance and the life that influences breaker 3 of the impact of breaker 3 of the cubic material of high-speed flow.

The screening device 2 comprises a plurality of screening rollers 21 which are uniformly arranged at intervals and used for conveying materials, two ends of each screening roller 21 are respectively arranged on bearing seats and are connected with a rotating shaft of a speed reducing motor through a coupler, and the screening rollers 21 can rotate in the same direction around the axial direction of the speed reducing motor along with the rotation of the rotating shaft of the speed reducing motor; one end of the screen roller 21 can also be provided with a gear which is driven by the chain transmission mechanism to rotate in the same direction. Referring to fig. 2, the surfaces of the screen rollers 21 rotating in the same direction form a screen surface for screening materials, the gaps between adjacent screen rollers 21 form screen holes 22, the gaps between adjacent screen rollers 21 are gradually increased along the material advancing direction, the surfaces of the screen rollers 21 are provided with saw teeth 23, the saw teeth 23 of adjacent screen rollers 21 are arranged in a staggered manner, and the arrangement enables the aperture of the screen holes 22 to be gradually increased. The sieve mesh 22 with breaker 3's discharge gate all corresponds the pan feeding mouth setting of collecting hopper, promptly the collecting hopper is located screening plant 2 and breaker 3's lower extreme, the pan feeding mouth cover of collecting hopper sieve mesh 22 of sieve roller 21 with breaker 3's discharge gate is used for receiving the follow qualified thin material that sieve roller 21 sieved and warp breaker 3 broken qualified thin material.

The surface of the screen roller 21 is provided with a wear-resistant layer 5; the wear resistant layer 5 is made of a wear resistant ceramic, such as a silicon carbide ceramic. The thickness of the wear-resistant layer 5 is gradually reduced along the advancing direction of the material; so as to ensure that the abrasion resistance of the abrasion resistant layer 5 is matched with the abrasion degree of the screen roller 21 at each position, and the service life of the screen roller 21 is prolonged. The gap between adjacent screen rolls 21 can be gradually increased by the thickness of the wear resistant layer 5 decreasing in sequence, or the gap between adjacent screen rolls 21 can be gradually increased by changing the distance between the adjacent screen rolls 21, or a combination of the two.

Adopt above-mentioned technical scheme: after the material falls to the screening device 2 through the feeding device 1, the plurality of screen rollers 21 rotate in the same direction, and the material is continuously conveyed forwards and screened while being conveyed. The aperture of the sieve pores 22 is gradually increased, so that qualified fine materials in the materials to be sieved and crushed can gradually pass through the sieve from small to large, and the blockage caused by excessive accumulated materials at the sieve pores 22 is avoided; secondly, the staggered saw teeth 23 are used for stirring, cutting, crushing and the like on the materials, so that the materials are effectively loosened, the materials can more smoothly move forwards on a screen surface, the screening effect of the materials is improved, and the triangular space stacking at the screen holes 22 is further avoided, so that the congestion is avoided, and the phenomenon that the screen rollers 21 are blocked is eliminated; the screening efficiency is high.

Example 2

Example 2 is essentially the same as example 1, except that: referring to fig. 3, which illustrates 4 screen rollers 21, a plurality of the screen rollers 21 are divided into screen rollers 21 of a cloth section 24 and screen rollers 21 of a screen section 25, the cloth section 24 is close to the feeding end of the screening device 2, and the screen section 25 is close to the discharging end of the screening device 2; the screen surface formed by the material distribution section 24 is parallel to the horizontal plane, and the included angle between the screen surface formed by the screen section 25 and the horizontal direction is 10-30 degrees; as a further preference of this embodiment, the rotation speed of the screen roller 21 of the cloth section 24 is lower than the rotation speed of the screen roller 21 of the screen section 25; realize that variable transmission's structure has the multiple, if can realize through the gear motor that a plurality of velocity ratios are different, also can realize through the gear of gear ratio difference in the patent CN201310213272.5, the utility model discloses do not restrict.

Adopt above-mentioned technical scheme: because the material speed of pan feeding end is low, and it is big to promote the friction of in-process and front end screen roller 21 at its speed, leads to the screen roller 21 degree of wear of cloth section 24 to be greater than the screen roller 21 of sieve section 25, consequently, through reducing cloth section 24 speed, realizes accelerating step by step along the material advancing direction, can reduce the friction damage of front end screen roller 21 and material, is favorable to prolonging the life of screen roller 21. And the rotating speed of the screen roller 21 of the screening section 25 is relatively fast, so that the material thickness of the screening section 25 is relatively thin, the screening effect is favorably improved, the rotating speed of the material distribution section 24 is relatively slow, the material thickness of the material distribution section 24 is relatively increased, and the uniformity of the material distribution section 24 is favorably realized.

Claims

1. The utility model provides a lime stone screening crushing system, includes material feeding unit (1), screening plant (2) and breaker (3), its characterized in that, the discharge end of screening plant (2) is just right the pan feeding mouth of breaker (3), screening plant (2) are including a plurality of sieve rollers (21) that are used for carrying the material, syntropy pivoted the surface formation sifter of sieve roller (21), and along material advancing direction, it is adjacent clearance between sieve roller (21) increases gradually.

2. Limestone screening and crushing system according to claim 1, characterized in that the surface of the screening rollers (21) is provided with serrations (23), the serrations (23) of adjacent screening rollers (21) being staggered.

3. Limestone screen breaking system according to claim 1 or 2, characterized in that a plurality of said screen rollers (21) are divided into screen rollers (21) of a distribution section (24) and screen rollers (21) of a screen section (25), said distribution section (24) being close to the infeed end of said screening device (2) and said screen section (25) being close to the outfeed end of said screening device (2).

4. Limestone screening and crushing system according to claim 3, characterized in that the rotation speed of the screen rollers (21) of the distribution section (24) is lower than the rotation speed of the screen rollers (21) of the screen section (25).

5. Limestone screening and crushing system according to claim 3, characterized in that the distribution section (24) forms a screening surface parallel to the horizontal plane, the screening surface formed by the screening section (25) having an angle of 10 ° to 30 ° with the horizontal.

6. Limestone screening and crushing system according to claim 1, characterized in that the surface of the screen roller (21) is provided with a wear resistant layer (5).

7. Limestone screening and crushing system according to claim 6, characterized in that the thickness of the wear layer (5) decreases in the direction of travel of the material.

8. Limestone screening and crushing system according to claim 1, characterized in that a buffer hopper (4) is arranged between the screening device (2) and the crushing device (3), and the discharge end of the screening device (2) is connected with the feed inlet of the crushing device (3) through the buffer hopper (4).