RU2833823C1 - Grinding machine for sorting mineral sand - Google Patents

Abstract

FIELD: performing operations.

SUBSTANCE: invention relates to a grinding machine, in particular to a grinding machine for sorting mineral sand. Grinding machine comprises drum and drive shaft. One end of the drum is connected to the supply pipe, and the other end is connected to the unloading pipe; at that, the drive shaft is connected with possibility of sliding with a plurality of grinding discs with one end of the unloading pipe. Grinding machine is equipped with a sorting disc, wherein an elastic bushing is connected between two adjacent grinding discs. Sorting disc and adjacent grinding disc are connected by rigid connecting bushing, drum is equipped with telescopic rod at one end of unloading pipe, and telescopic end of telescopic rod is connected to sorting disc.

EFFECT: grinding machine provides increased grinding efficiency.

10 cl, 11 dwg

Description

Technical area

The present invention relates to the technical field of a grinding machine, in particular to a grinding machine for sorting mineral sand.

Reference technology

With the continuous exploitation of mineral resources, the trend of using poor, fine and heterogeneous ores is becoming more and more obvious. It is an inevitable choice for the development of mining industry to improve the comprehensive utilization of poor, fine and difficult to process ores. Regardless of mineral processing or hydrometallurgy, effective separation of mineral monomers is a prerequisite for the sorting and beneficiation of valuable minerals, and grinding operations are a vital link in the development and utilization of mineral resources. Its investment accounts for a large proportion, production costs account for a high proportion, and has a great impact on the subsequent processes, especially fine grinding and ultrafine grinding. It is the key to the success of the development and utilization of poor ores, so it has received more and more attention.

Aisha grinding machine can adjust the speed of the grinding machine by frequency conversion to reduce the influence of the fluctuation of the ore feed on the fineness of the crushed mineral products, so as to ensure the stability of the subsequent sorting performance. The cylinder body is lined with rubber material, the diameter of the grinding medium ball is small, in addition, the cylinder body is almost silent when the equipment is running, and the consumption of the medium is less than one tenth of that of the ball grinder. However, the frequency conversion method for adjusting the speed of the grinding machine also affects the particle size distribution of the crushed mineral products to a certain extent, which is not conducive to the fineness of the sorting of the crushed mineral products.

Contents of the invention

The object of the present invention is to provide a grinding machine for classifying mineral sand to solve the technical problems associated with low grinding efficiency and insufficient fine grinding degree proposed in the above-mentioned basic technology.

In order to achieve the above-mentioned objects, the present invention provides the following technical scheme: a grinding machine for sorting mineral sand, which comprises a drum for material and a drive shaft, one end of the drum is connected to a feed pipe, and the other end is connected to a discharge pipe, the drive shaft is slidably connected to a plurality of grinding discs, the drive shaft is slidably connected to one end of the discharge pipe, there is a sorting disc, and an elastic sleeve is connected between two adjacent grinding discs, the sorting disc and the adjacent grinding disc are connected by a rigid connecting sleeve, the drum is provided with a telescopic rod at one end of the discharge pipe, the telescopic end of the telescopic rod is connected to the sorting disc.

Preferably, the grinding machine also includes a motor, the output end of the motor is connected to a gear reducer, the output end of the gear reducer is connected to a drive shaft via a coupling, and the end of the drive shaft is fixed using a plate with an end position.

Preferably, the front and rear ends of the drum are respectively provided with a front end cover and a rear end cover, the outer side of the rear end cover is secured with a fixed plate, the discharge pipe is secured above the fixed plate, and two adjacent grinding discs communicating with the inside of the drum divide the drum into different grinding chambers, wherein each of the grinding chambers is filled with grinding medium.

Preferably, a plurality of discharge openings are provided on the peripheral side of the sorting disk, and a feed plate is fixed at one end of the sorting disk near the grinding disk, wherein a plurality of feed openings are provided on the feed plate, the center of the sorting disk is fixed with an insulating sleeve, and the insulating sleeve is rotatably connected to the rotating sleeve.

Preferably, the rear end cover is provided with a first discharge opening communicating with the discharge pipe, the inner side of the rear end cover is secured with a sleeve plate, the sleeve plate is provided with a second discharge opening corresponding to the first discharge opening, a sleeve is secured on the inner side of the sleeve plate, connected to an insulating sleeve, the telescopic end of the telescopic rod is located in the insulating sleeve and the sleeve, and the telescopic end of the telescopic rod is connected to the rotating sleeve.

It is preferable that the telescopic rod uses an electric telescopic rod, and the maximum telescopic distance of the telescopic rod is less than the depth of the socket of the sleeve and the insulating sleeve.

Preferably, the elasticity coefficient of the elastic sleeve in the direction from the feed pipe to the discharge pipe gradually decreases.

It is preferable that the drive shaft in the drum is provided with a plurality of limiting strips, and the internal holes of the grinding disk and the sorting disk are provided with a limiting groove that corresponds to the sliding of the limiting strip.

It is preferable that the grinding disc be provided with multiple feed holes.

Preferably, the elastic sleeve comprises a polyurethane coating layer, and a spring is embedded in the polyurethane coating layer.

The beneficial effects of the present invention are:

1. The present invention is slidably connected to a plurality of grinding discs through a drive shaft, the end of the drive shaft is fixed by an end position plate, the drive shaft is slidably connected to a sorting disc near one end of a discharge pipe, and an elastic sleeve is connected between adjacent grinding discs, and a rigid connecting sleeve is connected between the sorting disc and the adjacent grinding disc. Due to the action of the elastic sleeve, the distance between the grinding discs can be automatically adjusted according to the amount of material to be ground in each grinding chamber, so that the material that matches the particle size can quickly move from the through hole in the direction of the discharge pipe, improving the grinding efficiency.

2. The invention is provided with a telescopic rod for one end of the discharge pipe through the barrel, and the telescopic end of the telescopic rod is connected to the profiling wheel. According to the mineral characteristics, the length of the telescopic rod can be adjusted to determine the grinding and consumption rate of the material. By increasing the distance between the sorting disc and the discharge pipe and reducing the distance between the grinding discs, it effectively increases the distance from the large particles entering the sorting disc to the direction of the feed pipe, so that the large particles entering back can better contact with the grinding disc, so that the material can be better ground twice or more times, thereby improving the grinding effect. When the grinding discs are compressed with each other, the space of the grinding chamber becomes smaller, which not only improves the contact area between the grinding medium and the large particles, but also allows the material that matches the particle size to move quickly from the through hole toward the discharge pipe, further improving the grinding efficiency, by reducing the distance between the sorting disc and the discharge pipe, under the action of the ore feeding pressure, all the grinding discs move toward the discharge pipe, facilitating the grinding process. For feeding the material from the feeding pipe, since the sorting disc is closer to the discharge hole, the material is easier to discharge from the discharge pipe.

3. The elastic coefficient of the elastic sleeve in the direction from the feed pipe to the discharge pipe is reduced one by one by setting the elastic coefficient of the elastic sleeve in the direction from the feed pipe to the discharge pipe. When the length of the telescopic end of the telescopic rod is adjusted, the distance between the grinding discs near the feed pipe is relatively large compared with the distance between the grinding discs near the discharge pipe. In this way, it is possible to promote the rapid concentration of materials in the direction of the discharge pipe, so that the material corresponding to the particle size can be quickly moved from the through hole in the direction of the discharge pipe, which further improves the grinding efficiency.

Description of the drawings

Fig. 1 shows a basic diagram of the design of a longitudinal cross-section of a mill for sorting mineral sand according to the invention;

Fig. 2 shows a schematic diagram of the internal structure of the cross-section of the barrel according to the invention;

Fig. 3 is a partially enlarged schematic diagram of direction A in Fig. 2;

Fig. 4 is a partially enlarged schematic diagram of direction B in Fig. 2;

Fig. 5 shows a basic diagram of the connecting structure of the grinding disk and the sorting disk on the drive according to the invention;

Fig. 6 shows a schematic diagram of the design of a sorting disk according to the invention;

Fig. 7 shows a schematic diagram of the design of the drive shaft according to the invention;

Fig. 8 shows a basic diagram of the design of a grinding disk according to the invention;

Fig. 9 shows a basic diagram of the connecting structure of the sorting disk and the rear end cover according to the invention;

Fig. 10 is a schematic diagram of the grinding disc according to the present invention when it is displaced;

Fig. 11 shows a basic diagram of the design of an elastic sleeve according to the invention.

The attached icons are labeled as follows: 1. Drum; 2. Drive shaft; 201. Limit bar; 3. Feed pipe; 4. Discharge pipe; 5. Grinding disc; 501. Feed opening; 6. Sorting disc; 601. Stripping opening; 602. Feed plate; 603. Feed opening; 604. Insulating sleeve; 605. Rotating sleeve; 7. Elastic sleeve; 701. Polyurethane coating layer; 702. Spring; 8. Rigid coupling sleeve; 9. Telescopic rod; 10. Motor; 11. Gearbox; 12. Clutch; 13. Front end cover; 14. Rear end cover; 15. Fastening plate; 16. First relief hole; 17. Sleeve plate; 18. Second relief hole; 19. Sleeve; 20. Limit groove; 21. Limit plate.

Specific implementation method

The following will be combined with the drawings in the embodiment of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described. It is obvious that the described embodiment is only a part of the embodiment of the present invention, not the entire embodiment. Based on the examples in the present invention, all other examples obtained by technical personnel in the field without creative work fall within the protection scope of the present invention.

Please refer to Fig. 1. In the first embodiment of the present invention, a grinding machine for sorting mineral sand is provided, which comprises a drum 1 and a motor 10, the output terminal of the motor 10 is connected to a reducer 11, the output terminal of the reducer 11 is connected to a drive shaft 2 via a coupling 12, the drive shaft 2 is provided with a grinding disk 5, the grinding disk 5 is provided with a plurality of feed holes 501, one end of the cylinder 1 is connected to a feed pipe 3, the other end of the cylinder 1 is connected to a discharge pipe 4, a slurry is fed from the feed pipe 3, and large particles in the slurry pass through the drum. After the grinding disk 5 from 1 is crushed into small particles, it is discharged from the discharge pipe 4.

In this particular embodiment, the front and rear ends of the barrel 1 are respectively provided with a front end cover 13 and a rear end cover 14, the outer side of the rear end cover 14 is secured with a fixing plate 15, the discharge pipe 4 is secured above the fixing plate 15 and communicates with the inside of the drum 1, the rear end cover 14 is provided with a first discharge opening 16 communicating with the discharge pipe 4, two adjacent grinding discs 5 divide the drum into different grinding chambers, and each grinding chamber is filled with grinding medium, the grinding medium consists of grinding balls of different sizes.

During grinding, the grinding disk 5 rotates at high speed together with the drive shaft 2, causing the grinding medium in the drum 1 to generate centrifugal force. Under the action of the centrifugal force of high-speed rotation, the minerals and grinding medium are radially distributed from the drive shaft 2 to the inner wall of the drum 1 according to the particle size from fine to coarse, realizing coarse ball grinding of coarse particles and fine ball grinding of fine particles. Under the action of the ore feeding pressure, the required particle size increases in the paraxial zone and basically does not participate in grinding, effectively reducing overgrinding and realizing selective grinding of “coarse grinding and fine grinding”.

In this specific embodiment, one end of the drive shaft 2 near the discharge pipe 4 is provided with a sorting disk 6, the peripheral side of the sorting disk 6 is provided with a plurality of discharge holes 601, the sorting disk 6 is fixed at one end near the grinding disk 5 by a feeding plate 602, the feeding plate 602 is provided with a plurality of feeding holes 603, under the action of the sorting disk 6, the qualified products are discharged into the discharge pipe 4, and the medium and particles whose particle size does not meet the requirements continue to return from the discharge hole 601 to the drum 1 for grinding processing, to achieve a closed-loop grinding effect, which greatly simplifies the production process.

Please refer to Fig. 2-5. Based on the basic structure of the grinding machine in the above embodiment, in another embodiment of the present invention, the drive shaft 2 is slidably connected to a plurality of grinding discs 5, the end of the drive shaft 2 is fixed by the end position plate 21, the drive shaft 2 is slidably connected near one end of the discharge pipe 4 to the sorting disc 6, two adjacent grinding discs 5 are connected to each other by an elastic sleeve 7, the sorting disc 6 and the adjacent grinding disc 5 are connected by a rigid coupling sleeve 8, the drum 1 is provided with a telescopic rod 9 at one end of the discharge pipe 4, the telescopic end of the telescopic rod 9 and the connection of the sorting disc 6, when the drive shaft 2 is stationary, under the action of the elastic sleeve 7 and the rigid coupling sleeve 8, the grinding disc 5 is sequentially distributed at an equal distance, and the grinding disc 5 grinding disc 5, located next to the feed pipe 3, is close to the limiting plate 21.

When grinding under the action of the ore feeding pressure, due to the action of the elastic sleeve 7, the distance between the grinding discs 5 can be automatically adjusted according to the amount of material to be ground in each grinding chamber, so that the material corresponding to the particle size can quickly move from the loading device opening 501 in the direction of the discharge pipe 4, increasing the grinding efficiency.

In this embodiment, by adjusting the length of the telescopic end of the telescopic rod 9, the sorting disk 6 moves forward or backward, for example, the sorting disk 6 moves in the direction of the feed pipe 3, the sorting disk 6 drives the rigid connecting sleeve 8 so that the grinding disk 5 adjacent to the sorting disk 6 is compressed, since the elastic sleeve 7 is connected between two adjacent grinding disks 5, the other grinding disks 5 are radially offset in the direction of the discharge pipe 4, due to the locking of the limiting plate 21, the grinding disk 5 is close to the feed pipe 3 cannot be offset, then the distance between each grinding disk 5 becomes smaller.

By increasing the distance between the classifying disk 6 and the discharge pipe 4 and decreasing the distance between the grinding disk 5, the distance between the large particles returning from the classifying disk 6 to the feeding pipe 3 is effectively increased, so that the returning large particles can better contact with the grinding disk 5, so that the material can be better ground twice or more times, thereby improving the grinding effect. At the same time, when the grinding disks 5 are compressed with each other, the space of the grinding chamber becomes smaller, which not only improves the contact area between the grinding medium and the large particles, but also allows the material corresponding to the particle size to quickly move from the feeding port 501 to the discharge pipe 4 under the action of extrusion, which further improves the grinding efficiency.

For example, the sorting disk 6 moves in the direction of the discharge pipe 4. Under the action of the ore feed pressure, all the grinding disks 5 move in the direction of the discharge pipe 4, facilitating the flow of material from the feed pipe 3. Since the sorting disk 6 is closer to the discharge opening, the material is easier to discharge from the discharge branch pipe 4.

In this embodiment, as an option, the telescopic length of the telescopic rod 9 can be adjusted according to the characteristics of the mineral, and the fineness of grinding and the discharge speed of the material can be adjusted.

Please refer to Fig. 6-8. In another embodiment of the present invention, the drive shaft 2 in the cylinder 1 is provided with a plurality of limiting bars 201, and the inner holes of the grinding disk 5 and the sorting disk 6 are provided with a sliding fit with the limiting bar 201 of the limiting groove 20, so that the grinding disk 5 can smoothly move along the limiting bar 201, and the limiting bar 201 restricts the rotation direction of the grinding disk 5, and the grinding disk 5 can smoothly follow the rotation of the drive shaft 2.

Please refer to Fig. 6. In this embodiment, the center of the sorting disk 6 is fixed by an insulating sleeve 604, and the internal rotation of the insulating sleeve 604 is connected to the rotating sleeve 605.

Please refer to Fig. 9-10. In this embodiment, the rear end cover 14 is provided with a first discharge opening 16 communicating with the discharge pipe 4, the inner side of the rear end cover 14 is fixed by means of a sleeve plate 17, the sleeve plate 17 is provided with a second discharge opening 18 corresponding to the first discharge opening 16, the inner side of the sleeve plate 17 is fixed by a sleeve 19 connected to each other by an insulating sleeve 604, the telescopic end of the telescopic rod 9 is located in the insulating sleeve 604 and the sleeve 19, and the telescopic end of the telescopic rod 9 is connected to the connection of the rotating sleeve 605.

Please refer to Fig. 11. The elastic sleeve 7 has a polyurethane coating layer 701, and a spring 702 is embedded in the polyurethane coating layer 701. Due to the good wear resistance and elasticity of the polyurethane material, the combined spring 702 can effectively lock each grinding disc 5.

In this embodiment, the telescopic rod 9 uses an electric telescopic rod, and the maximum telescopic distance of the telescopic rod 9 is less than the depth of the socket of the sleeve 19 and the insulating sleeve 604. Thus, during the entire process of moving the grinding disk 5, the insulating sleeve 604 and the sleeve 19 protect the drive shaft 2 between the sorting disk 6 and the rear end cover 14, and the elastic sleeve 7 protects the drive shaft 2 between the grinding disk 5, thereby preventing material particles from entering the drive shaft 2 and affecting the moving effect of the grinding disk 5.

In other embodiments of the present invention, the elastic coefficient of the elastic sleeve 7 along the direction from the feed pipe 3 to the discharge pipe 4 becomes smaller one by one, so that when adjusting the length of the telescopic end of the telescopic rod 9, the distance between the grinding disk 5 is shortened to the feed pipe 3 is relatively large compared with the distance between the grinding disk 5 near the discharge pipe 4. The distance between the grinding disk 5 is large, so that it can promote rapid concentration of materials in the direction of the discharge pipe 4, so that the material that matches the particle size quickly moves from the through hole 501 in the direction of the discharge pipe 4, which further improves the grinding efficiency.

The above is only the best specific embodiment of the invention, but the scope of protection of the invention is not limited to this. Any technical person familiar with the technical field within the framework of the technology disclosed in the invention, in accordance with the technical scheme of the invention and the idea of the invention, must make equivalent replacements or changes falling within the scope of protection of the invention.

Claims (10)

1. A grinding machine for sorting mineral sand, which comprises a drum and a drive shaft, characterized in that one end of the drum is connected to a feed pipe, and the other end is connected to a discharge pipe, the drive shaft is slidably connected to a plurality of grinding discs, the drive shaft is slidably connected to one end of the discharge pipe, there is a sorting disc, and an elastic sleeve is connected between two adjacent grinding discs, the sorting disc and the adjacent grinding disc are connected by a rigid connecting sleeve, the drum is provided with a telescopic rod at one end of the discharge pipe, the telescopic end of the telescopic rod is connected to the sorting disc. 2. A grinding machine for sorting mineral sand according to claim 1, characterized in that: it also includes a motor, the output end of the motor is connected to a gearbox, the output end of the gearbox is connected to a drive shaft via a coupling, and the end of the drive shaft is secured using a plate with an end position. 3. A grinding machine for sorting mineral sand according to claim 1, characterized in that the front and rear ends of the drum are respectively provided with a front end cover and a rear end cover, the outer side of the rear end cover is secured with a fixed plate, the discharge pipe is secured above the fixed plate, and two adjacent grinding discs communicating with the inside of the drum divide the drum into different grinding chambers, wherein each of the grinding chambers is filled with grinding medium. 4. A grinding machine for sorting mineral sand according to item 3, characterized in that a plurality of discharge openings are provided on the peripheral side of the sorting disk, and a feed plate is fixed at one end of the sorting disk near the grinding disk, while a plurality of feed openings are provided on the feed plate, the center of the sorting disk is fixed with an insulating sleeve, and the insulating sleeve is rotatably connected to a rotating sleeve. 5. A grinding machine for sorting mineral sand according to claim 4, characterized in that the rear end cover is provided with a first discharge opening communicating with a discharge pipe, the inner side of the rear end cover is secured with a sleeve plate, the sleeve plate is provided with a second discharge opening corresponding to the first discharge opening, a sleeve is secured on the inner side of the sleeve plate, connected to an insulating sleeve, the telescopic end of the telescopic rod is located in the insulating sleeve and the sleeve, and the telescopic end of the telescopic rod is connected to the rotating sleeve. 6. A grinding machine for sorting mineral sand according to item 5, characterized in that an electric telescopic rod is used in the telescopic rod, and the maximum telescopic distance of the telescopic rod is less than the depth of the socket of the sleeve and the insulating sleeve. 7. A grinding machine for sorting mineral sand, according to paragraph 1, characterized in that the elasticity coefficients of the elastic sleeve in the direction from the feed pipe to the discharge pipe gradually decrease. 8. A grinding machine for sorting mineral sand according to item 1, characterized in that the drive shaft in the drum is provided with a plurality of limiting strips, and the internal openings of the grinding disk and the sorting disk are provided with a limiting groove that corresponds to the sliding of the limiting strip. 9. A grinding machine for sorting mineral sand according to item 1, characterized in that the grinding disk is provided with a plurality of feed holes. 10. A grinding machine for sorting mineral sand according to item 1, characterized in that the elastic sleeve contains a layer of polyurethane coating, and a spring is built into the layer of polyurethane coating.