Material grinding device

Abstract

The invention relates to a material grinding device which comprises a grinding platform, an annular grinding groove is formed in the top of the grinding platform, at least one grinding ball made of ferrous materials is movably placed in the grinding groove, and at least one through hole penetrating through the grinding platform is formed in the bottom of the grinding groove. A screening plate with a plurality of screening holes is installed in each through hole, a magnetic attraction mechanism capable of driving the grinding balls to rotate freely in the grinding groove is arranged on the portion, on the inner side of the grinding groove, of the grinding platform, and a sealing cover covering and sealing the top of the grinding groove is detachably installed on the top of the grinding groove. At least one air inlet pipe communicated with the grinding groove is arranged on the outer wall of the grinding groove, and a collecting assembly used for collecting grinding materials is arranged at the bottom of the grinding platform. According to the material grinding device, efficient grading of materials is achieved while the problem of transmission of grinding media is solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of material grinding, and in particular, to a material grinding device. Background Art

[0002] Grinding is the main link in the mineral processing process. Its main purpose is to promote the full dissociation of useful and useless minerals in the minerals, so as to create conditions for subsequent sorting operations. At present, the working modes of grinding equipment are mainly medium mills and air flow mills. Among them, medium mills are widely used in industry. The core lies in the rotating grinding medium. In the process of medium grinding, the material is ground into powder due to the impact, friction, extrusion and impact of the grinding medium. Here, in order to promote the relative rotation of the grinding medium, the market mostly adopts mechanical stirring, mill self-rotation transmission and other methods.

[0003] Most existing grinders focus on solving the problem of grinding medium transmission. In order to improve grinding efficiency, they mostly adopt direct transmission or add multi-stage grinding parts, which results in less grinding space, more complex structure and higher working energy consumption. As for the classification of materials after grinding, most of them simply take out the materials and then use direct screening, which is difficult to solve the problem of hole blockage in the screening process. Summary of the invention

[0004] The purpose of the present disclosure is to provide a material grinding device, which can achieve efficient material classification, so as to at least partially solve the above technical problems.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a material grinding device, including a grinding platform, a ring-shaped grinding groove is provided on the top of the grinding platform, at least one grinding ball of iron material is movably placed in the grinding groove, at least one through hole penetrating the grinding platform is opened at the bottom of the grinding groove, a sieve plate with multiple sieve holes is installed in each of the through holes, a magnetic attraction mechanism that can drive the grinding balls to rotate freely in the grinding groove is provided on the grinding platform on the inner side of the grinding groove, a sealing cover that covers and seals the grinding groove is detachably installed on the top of the grinding groove, at least one air inlet pipe connected to the outer wall of the grinding groove is provided, and a collecting component for collecting grinding materials is provided at the bottom of the grinding platform.

[0006] Optionally, there are four grinding balls and four sieve plates, and the four sieve plates are evenly distributed in the grinding tank.

[0007] Optionally, the magnetic attraction mechanism includes a drive motor and at least one permanent magnet, the drive motor is installed at the bottom of the grinding platform, and the output end of the drive motor passes through the grinding platform and extends above it, and the permanent magnet is installed at the output end of the drive motor.

[0008] Optionally, there are two air intake pipes, which are symmetrically arranged on the outside of the grinding groove, and the air intake directions of the two air intake pipes are the same, and the air intake direction of each air intake pipe is tangent to the groove wall of the grinding groove.

[0009] Optionally, the collecting assembly includes a funnel-shaped inner sleeve and an outer sleeve, the outer sleeve is sleeved on the outside of the inner sleeve to form a discharge trough between the two, the largest ends of the inner sleeve and the outer sleeve are connected to the bottom of the grinding platform, and the discharge trough corresponds to the position of the screening plate.

[0010] Optionally, the bottom of the inner sleeve is a closed structure.

[0011] Optionally, a plurality of support rods are provided between the inner sleeve and the outer sleeve, and the top surface of each of the support rods is a pointed structure.

[0012] Optionally, the outer wall of the outer sleeve is provided with a plurality of evenly distributed supporting legs.

[0013] Optionally, one end of the sealing cover is hingedly connected to the outer wall of the grinding groove, and the other end is connected to the grinding groove through a plurality of evenly distributed locking components, the locking component comprising a connecting ear, a screw and a locking nut, the connecting ear being horizontally mounted on the outer wall of the grinding groove, the screw being hingedly mounted at one end of the connecting ear away from the grinding groove, a notch being provided on the outer edge of the sealing cover, the screw being slidably inserted into the notch, and the locking nut being threadedly connected to the screw above the sealing cover.

[0014] Optionally, a sealing gasket is embedded in the bottom of the sealing cover.

[0015] Through the above technical scheme, a screening plate is arranged at the bottom of the grinding trough, and the ground material after grinding can be screened under the action of the screening plate. Only materials with qualified particle size can be discharged, and the particle size distribution of the product is strictly controlled to achieve material grading. The device integrates the functions of material grinding and grading, which greatly reduces the space occupied by the equipment and improves production efficiency; adopts a non-contact combined transmission method, combining the advantages of the magnetic field and the wind field, which can cause the grinding ball to rotate without contact, effectively reducing the influence of heat transfer of the rotating parts on the ground material; at the same time, the existence of the wind field can effectively promote the dispersion of the material in the grinding trough, and prevent the agglomeration and accumulation of the material during the grinding process, thereby improving the overall grinding efficiency, and realizing efficient material grading while solving the problem of grinding medium transmission.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a schematic cross-sectional structure diagram of a material grinding device provided in an exemplary embodiment of the present disclosure; Figure 2 yes Figure 1 A magnified view of part A; Figure 3 is a schematic diagram of a three-dimensional structure of a material grinding device provided in an exemplary embodiment of the present disclosure after removing a sealing cover; Figure 4 is a top view of a sealing cover provided in an exemplary embodiment of the present disclosure.

[0018] Description of Reference Numerals 1. Grinding platform; 2. Grinding trough; 3. Grinding balls; 4. Screening plate; 5. Sealing cover; 6. Inlet pipe; 7. Collecting assembly; 8. Driving motor; 9. Permanent magnet; 10. Support leg; 11. Connecting ear; 12. Screw; 13. Locking nut; 14. Notch; 15. Sealing gasket; 16. Torsion ring; 71. Inner sleeve; 72. Outer sleeve; 73. Discharge trough; 74. Support rod. DETAILED DESCRIPTION

[0019] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0020] In the description of the present disclosure, it should be understood that the terms "upper", "lower" and the like indicate positions or location relationships based on Figure 1 The directions of the drawings shown are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, a specific orientation structure and operation, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "inside" and "outside" refer to the inside and outside of the corresponding structural contours. In addition, the terms "first", "second", etc. are only used to distinguish one element from another element and do not have order and importance.

[0021] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0022] See also Figure 1-4 The material grinding device of the present invention comprises a grinding platform 1, which is a circular platform. A ring-shaped grinding groove 2 is arranged on the top of the grinding platform 1. The cross section of the grinding groove 2 is U-shaped. The grinding groove 2 is located at the outer edge of the grinding platform 1. The grinding platform 1 and the grinding groove 2 are both steel plates. The outer diameter of the grinding groove 2 is 500 mm, the inner diameter is 300 mm, and the height of the grinding groove 2 is 200 mm. At least one grinding ball 3 of iron material is movably placed in the grinding groove 2. The diameter of the grinding ball 3 is 150 mm. At least one through hole penetrating the grinding platform 1 is opened at the bottom of the grinding groove 2, and each through hole is installed There is a sieve plate 4 with multiple sieve holes, the sieve holes of the sieve plate 4 range from 0.01 to 1 mm, are fan-shaped, and have an arc of 30°. A magnetic attraction mechanism is provided on the grinding platform 1 inside the grinding tank 2, which can drive the grinding balls 3 to rotate freely in the grinding tank 2. A sealing cover 5 is detachably installed on the top of the grinding tank 2 to cover and seal it. The diameter of the sealing cover 5 is larger than the outer diameter of the grinding tank 2. Its detachable structure facilitates the addition of materials to be ground. At least one air intake pipe 6 connected to the outer wall of the grinding tank 2 is provided, and the air intake pipe 6 is connected to a high-pressure air pump. A collecting component 7 for collecting the ground material is provided at the bottom of the grinding platform 1.

[0023] The material grinding device of the present invention provides a screening plate 4 at the bottom of the grinding tank 2. The ground material can be screened under the action of the screening plate 4. Only materials with qualified particle sizes can be discharged, and the particle size distribution of the product is strictly controlled to achieve material grading. The device integrates the functions of material grinding and grading, greatly reduces the space occupied by the equipment, and improves production efficiency.

[0024] Preferably, there are four grinding balls 3 and four screening plates 4, and the four screening plates 4 are evenly distributed in the grinding tank 2. The four grinding balls 3 and the screening plates 4 can further improve the grinding efficiency and facilitate the discharge of materials.

[0025] Preferably, the magnetic attraction mechanism includes a drive motor 8 and at least one permanent magnet 9, wherein the drive motor 8 is installed at the bottom of the grinding platform 1, and the output end of the drive motor 8 passes through the grinding platform 1 and extends above it, and the permanent magnet 9 is installed at the output end of the drive motor 8, there are two permanent magnets 9, and the two permanent magnets 9 are evenly distributed. The permanent magnet 9 is a fan-shaped structure with a radius of 125 mm and an arc of 60°. The drive motor 8 drives the permanent magnet 9 to rotate, and the magnetic field formed by the rotating magnet drives the grinding ball 3 to rotate to achieve grinding of the material. In order to prevent the drive motor 8 from being disturbed by the magnetic field, an insulating plate can be set on the grinding platform 1 on the inner side of the grinding groove 2. In other embodiments, the drive motor 8 can also be a hydraulic motor.

[0026] The material grinding device of this embodiment adopts a non-contact combined transmission method, combining the multiple field advantages of the magnetic field and the wind field, and can cause the grinding balls to rotate without contact, effectively reducing the influence of heat transfer of the rotating parts on the ground materials; at the same time, the existence of the wind field can effectively promote the dispersion of the material in the grinding tank, and prevent the agglomeration and accumulation of the material during the grinding process, thereby improving the overall grinding efficiency, and realizing efficient classification of the material while solving the problem of grinding medium transmission.

[0027] Preferably, there are two air inlet pipes 6, which are symmetrically arranged outside the grinding tank 2, and the air inlet directions of the two air inlet pipes 6 are the same, and the air inlet direction of each air inlet pipe 6 is tangent to the wall of the grinding tank 2. The tangential air inlet method can better blow the material and also play a role in pushing the grinding balls 3.

[0028] In this embodiment, a wind field is generated by tangential wind inlet. Due to the sealing of the grinding tank 2, the internal wind field will form a certain air pressure in the grinding tank 2, thereby causing a certain wind pressure to be formed above and below the screening plate 4 at the bottom of the grinding tank 2. The existence of wind pressure can clear the blocked sieve holes in time and reduce the blocking rate of the screening plate, thereby effectively improving the screening efficiency.

[0029] Preferably, the collecting assembly 7 comprises a funnel-shaped inner sleeve 71 and an outer sleeve 72, wherein the height of the inner sleeve 71 is 390 mm, the height of the outer sleeve 72 is 400 mm, the top diameter of the outer sleeve 72 is 500 mm, and the bottom diameter of the outer sleeve 72 is 100 mm; the top diameter of the inner sleeve 71 is 300 mm, and the bottom diameter of the inner sleeve 71 is 50 mm, and the outer sleeve 72 is sleeved on the outer side of the inner sleeve 71 to form a discharge groove 73 between the two, and the largest ends of the inner sleeve 71 and the outer sleeve 72 are connected to the bottom of the grinding platform 1, and the discharge groove 73 corresponds to the position of the sieve plate 4, so as to ensure that the material can fall from the discharge groove 73. In this embodiment, by arranging the inner and outer sleeves at the bottom of the grinding tank 2, the pollution-free grinding process can be effectively achieved.

[0030] Preferably, the bottom of the inner sleeve 71 is a closed structure. Specifically, the bottom of the inner sleeve 71 can be sealed by bottom plate welding to prevent materials from floating into the inner sleeve 71 and causing contamination to the drive motor 8.

[0031] Preferably, a plurality of support rods 74 are provided between the inner sleeve 71 and the outer sleeve 72 to improve the structural strength of the collecting assembly 7 , and the top surface of each support rod 74 is a pointed structure to prevent materials from accumulating on the support rod 74 .

[0032] Preferably, a plurality of evenly distributed support legs 10 are provided on the outer wall of the outer sleeve 72 to support the entire device and facilitate the collection of materials at the bottom of the outer sleeve 72 .

[0033] Preferably, one end of the sealing cover 5 is hingedly connected to the outer wall of the grinding tank 2, and the other end is connected to the grinding tank 2 through a plurality of evenly distributed locking components, so as to realize the detachable installation of the sealing cover 5. Specifically, the locking component includes a connecting ear 11, a screw 12 and a locking nut 13, wherein the connecting ear 11 is horizontally installed on the outer wall of the grinding tank 2, the screw 12 is hingedly installed at one end of the connecting ear 11 away from the grinding tank 2, a notch 14 is provided on the outer edge of the sealing cover 5, the screw 12 is slidably inserted into the notch 14, and the locking nut 13 is threadedly connected to the screw 12 above the sealing cover 5. When in use, the sealing cover 5 is covered on the top of the grinding tank 2, so that the bottom surface of the sealing cover 5 is close to the top of the grinding tank 2, and then the screw 12 is rotated to be inserted into the notch 14, and then the locking nut 13 is tightened to squeeze the sealing cover 5, so that the sealing cover 5 seals the grinding tank 2. The detachable installation structure of the sealing cover 5 can conveniently and quickly open or lock the sealing cover, and is very convenient to use. Furthermore, a sealing gasket 15 is embedded at the bottom of the sealing cover 5 . The sealing gasket 15 is made of rubber. The sealing gasket 15 is in contact with the top of the grinding tank 2 , so that the sealing performance can be further improved.

[0034] In this embodiment, by installing a sealing cover 5 on the top of the grinding tank 2, dust generated during the grinding process can be effectively reduced.

[0035] The processing process of the material grinding device of the present invention comprises the following steps: Step 1: Place the material to be ground in the grinding tank 2, and cover the grinding tank 2 with a sealing cover 5 to seal the grinding tank 2; Step 2: Start the permanent magnet 9 to rotate counterclockwise to form a rotating magnetic field. At the same time, the airflow enters the grinding tank 2 in a tangential direction through the air inlet pipes 6 at both ends, thereby forming a rotating air field in the sealed grinding tank 2. Step 3: Under the combined action of the rotating magnetic field and the gas field, the grinding balls 3 begin to rotate along the inner wall of the grinding tank 2, thereby grinding the material in the tank; Step 4: The ground material enters the discharge groove 73 formed by the inner and outer sleeves through the screening plate 4 under the action of the internal and external wind pressure formed by the air field, and is discharged to form a fine particle product; Step 5: The coarse particles that have not passed through the screening plate 4 will remain in the grinding trough 2 for further grinding until all the materials in the grinding trough 2 are discharged through the screening plate 4 and the discharge trough 73, thereby realizing the integrated operation of material grinding and grading.

[0036] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0037] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0038] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A material grinding device, characterized in that: It comprises a grinding platform, the top of which is provided with an annular grinding groove, in which at least one grinding ball made of ferrous material is movably placed, the bottom of which is provided with at least one through hole penetrating the grinding platform, each of which is provided with a sieve plate with a plurality of sieve holes, a magnetic attraction mechanism which can drive the grinding balls to rotate freely in the grinding groove is provided on the grinding platform on the inner side of the grinding groove, a sealing cover which covers and seals the grinding groove is detachably installed on the top of the grinding groove, at least one air inlet pipe connected thereto is provided on the outer wall of the grinding groove, and a collecting component for collecting the grinding material is provided at the bottom of the grinding platform.

2. The material grinding device according to claim 1, characterized in that: There are four grinding balls and four screening plates, and the four screening plates are evenly distributed in the grinding tank.

3. The material grinding device according to claim 2, characterized in that: The magnetic attraction mechanism includes a drive motor and at least one permanent magnet. The drive motor is installed at the bottom of the grinding platform, and the output end of the drive motor passes through the grinding platform and extends above it. The permanent magnet is installed at the output end of the drive motor.

4. The material grinding device according to claim 1, characterized in that: There are two air intake pipes, which are symmetrically arranged on the outside of the grinding groove. The air intake directions of the two air intake pipes are the same, and the air intake direction of each air intake pipe is tangent to the groove wall of the grinding groove.

5. The material grinding device according to claim 1, characterized in that: The collecting assembly includes a funnel-shaped inner sleeve and an outer sleeve. The outer sleeve is sleeved on the outside of the inner sleeve to form a discharge groove between the two. The largest ends of the inner sleeve and the outer sleeve are connected to the bottom of the grinding platform. The discharge groove corresponds to the position of the screening plate.

6. The material grinding device according to claim 5, characterized in that: The bottom of the inner sleeve is a closed structure.

7. The material grinding device according to claim 5, characterized in that: A plurality of support rods are arranged between the inner sleeve and the outer sleeve, and the top surface of each support rod is a pointed structure.

8. The material grinding device according to claim 5, characterized in that: The outer wall of the outer sleeve is provided with a plurality of evenly distributed supporting legs.

9. The material grinding device according to any one of claims 1 to 8, characterized in that: One end of the sealing cover is hingedly connected to the outer wall of the grinding groove, and the other end is connected to the grinding groove through a plurality of evenly distributed locking components. The locking component includes a connecting ear, a screw and a locking nut. The connecting ear is horizontally installed on the outer wall of the grinding groove, and the screw is hingedly installed at the end of the connecting ear away from the grinding groove. A notch is provided on the outer edge of the sealing cover, and the screw is slidably inserted into the notch, and the locking nut is threadedly connected to the screw above the sealing cover.

10. The material grinding device according to claim 9, characterized in that: A sealing gasket is embedded in the bottom of the sealing cover.

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