A crushing device for producing calcium carbonate powder

Abstract

The utility model relates to a kind of crushing devices for calcium carbonate powder production, including the outer tube of inclination, rotating inner tube is equipped in outer tube, there are multiple groups of tool holders in the circumferential array arrangement in inner tube, each group of tool holders is arranged along the inner tube axial direction, tool holder has shaft sleeve in the both ends of inner tube, shaft sleeve is rotatably connected with outer tube, the center of inner tube is equipped with rotating shaft, rotating shaft is rotatably connected with shaft sleeve, there are multiple groups of crushing knives with tool holder engagement on rotating shaft, sieve hole is equipped on the inner tube between the two adjacent groups of tool holders, the spacing of tool holder and the thickness of crushing knife gradually decrease with the inclination direction of outer tube.The crushing device for calcium carbonate powder production described in the application gradually reduces the spacing of tool holder and the thickness of crushing knife, so that the broken particles gradually become smaller, the small particles fall into the outer tube from the sieve hole of the inner tube, the large particles gradually flow to smaller tool holders and are cut into pieces by the rotation of the inner tube. In the process of step-by-step crushing, external multi-stage screening and re-injection are not required, and the crushing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a crushing device, and more particularly to a crushing device for the production of calcium carbonate powder. Background Technology

[0002] Calcium carbonate ore is a mineral resource whose main component is calcium carbonate (CaCO3). This ore has wide applications in industry, including but not limited to building materials, papermaking, coatings, plastics, chemicals, pharmaceuticals, food, and environmental protection. Due to its abundant calcium resources, calcium carbonate ore plays an important role in many industries. After mining, calcium carbonate ore requires crushing.

[0003] Existing crushing devices, whether jaw, impact, cone, or cone crushers, produce uneven particle sizes after crushing, requiring multi-stage crushing to meet the standards for calcium carbonate grinding. Each stage of crushing necessitates screening and re-feeding, resulting in low work efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a crushing device for calcium carbonate powder production, which solves the problem that existing crushing devices, whether jaw, impact, cone, or cone crushers, produce uneven particle sizes after crushing, requiring multi-stage crushing to meet the standards for calcium carbonate grinding, and each stage of crushing requires screening and re-feeding, resulting in low working efficiency.

[0005] To address the aforementioned problems, this utility model provides a crushing device for calcium carbonate powder production, comprising an inclined outer cylinder, a rotating inner cylinder inside the outer cylinder, and openings at both ends of the inner cylinder. Multiple sets of cutter holders are fixedly connected within the inner cylinder in a circumferential array, each set arranged axially along the inner cylinder. Bushings are fixedly connected to both ends of the cutter holders within the inner cylinder, and the bushings are rotatably connected to the outer cylinder. A rotating shaft is located at the center of the inner cylinder, rotatably connected to the bushings. Multiple sets of crushing blades are fixedly connected to the rotating shaft and engage with the cutter holders. Screen holes are provided on the inner cylinder wall between adjacent sets of cutter holders. The spacing between the cutter holders and the thickness of the crushing blades gradually decrease from the high end to the low end of the outer cylinder.

[0006] The crushing device for calcium carbonate powder production provided by this utility model also has the following technical features:

[0007] Furthermore, the upper end of the outer cylinder is fixedly connected to the opening of the inner cylinder with a feed port, and the lower end of the outer cylinder is provided with a discharge port located at the bottom of the inner cylinder.

[0008] Furthermore, annular grooves are fixedly connected to the inner walls at both ends of the outer cylinder, and the inner cylinder wall extends into the grooves, with the inner cylinder rotatably connected to the grooves.

[0009] Furthermore, a first motor is fixedly connected to one end of the outer cylinder, and the drive shaft of the first motor is connected to the bushing. A second motor is fixedly connected to the other end of the outer cylinder, and the drive shaft of the second motor is connected to the rotating shaft. The bushing and the rotating shaft rotate in opposite directions.

[0010] Furthermore, the outer cylinder is fixedly connected to a bracket.

[0011] Furthermore, the meshing surfaces of both the blade holder and the crushing blade are concave.

[0012] Furthermore, there are three sets of blade holders and two sets of crushing blades.

[0013] This invention has the following advantages: by gradually reducing the distance between the blade holders and the thickness of the crushing blades, the crushed particles gradually become smaller. Particles that meet the diameter requirements can fall from the screen holes of the inner cylinder into the outer cylinder, while those that do not meet the requirements gradually flow to the lower end of the outer cylinder as the inner cylinder rotates and are sheared by smaller blade holders. In the process of step-by-step crushing, there is no need for external screening and re-feeding, which improves the crushing efficiency. Attached Figure Description

[0014] Figure 1 This is a rear-view cross-sectional isometric schematic diagram of the crushing device for calcium carbonate powder production according to an embodiment of the present invention.

[0015] Figure 2 Crushing device for calcium carbonate powder production according to an embodiment of this utility model Figure 1 Enlarged view of node A in the middle;

[0016] Figure 3 This is a front cross-sectional view of the crushing device for producing calcium carbonate powder according to an embodiment of the present invention.

[0017] Figure 4 This is a right-side cross-sectional view of the crushing device for producing calcium carbonate powder according to an embodiment of the present invention.

[0018] Figure 5 This is a front axonometric view of the crushing device for producing calcium carbonate powder according to an embodiment of the present invention.

[0019] (1-Outer cylinder, 2-Inner cylinder, 3-Knife holder, 4-Shaft sleeve, 5-Rotating shaft, 6-Crushing knife, 7-Screen hole, 8-Feed inlet, 9-Discharge outlet, 10-Railway groove, 11-First motor, 12-Second motor, 13-Support) Detailed Implementation

[0020] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0021] like Figures 1 to 5In the embodiment of the crushing device for calcium carbonate powder production of this utility model shown, the crushing device for calcium carbonate powder production includes an inclined outer cylinder 1, a rotating inner cylinder 2 inside the outer cylinder 1, and openings at both ends of the inner cylinder 2. Multiple sets of cutter holders 3 arranged in a circumferential array are fixedly connected inside the inner cylinder 2. Each set of cutter holders 3 is arranged along the axial direction of the inner cylinder 2. Bushings 4 are fixedly connected to both ends of the cutter holders 3 and are rotatably connected to the outer cylinder 1. A rotating shaft 5 is provided at the center of the inner cylinder 2 and is rotatably connected to the bushings 4. Multiple sets of crushing blades 6 that mesh with the cutter holders 3 are fixedly connected to the rotating shaft 5. Screen holes 7 are provided on the inner cylinder wall between two adjacent sets of cutter holders 6. The spacing between the cutter holders 3 and the thickness of the crushing blades 6 gradually decrease from the high end to the low end of the outer cylinder 1.

[0022] Specifically, calcium carbonate crushed stone is fed into the inner cylinder 2, causing the inner cylinder 2 and the rotating shaft 5 to rotate simultaneously. The crushed stone rotates with the inner cylinder 2, supported by the cutter holder 3. As the rotating shaft 5 rotates, the crushing blades 6 gradually engage with the cutter holder 3, cutting the crushed stone that falls onto the cutter holder 3. The cut stone continues to rotate with the inner cylinder 2, and the next time it falls onto the cutter holder 3, smaller particles pass through the gaps in the cutter holder 3. Because the inner cylinder 2 is tilted with the outer cylinder 1, the crushed stone flows towards the direction where the gaps in the cutter holder 3 are smaller, gradually being cut into smaller pieces until it can fall into the outer cylinder 1 through the sieve holes 7. The spacing of the cutter holders 3 is used for step-by-step screening. In conjunction with the inclined inner cylinder 2 and outer cylinder 1, the crushed stone moves towards the denser crushing blades 6. Finally, the sieve holes 7 are used to screen out the stones that meet the particle requirements. The stones that do not meet the requirements are continuously crushed in stages under the action of the crushing blades 6 and cutter holders 3. During the step-by-step crushing process, there is no need for external screening and re-feeding. At the same time, it also avoids the mixing and crushing of large and small stones together, thus improving the crushing efficiency. In addition, the crushed stone continuously impacts the inner cylinder 2 as it rotates between the cutter holders 3, which can shake off the powder blocking the sieve holes 7 and prevent the sieve holes 7 from clogging.

[0023] In one embodiment of this application, preferably, the high end of the outer cylinder 1 is fixedly connected to the opening of the inner cylinder 2 with a feed port 8, and the bottom of the low end of the outer cylinder 1 is provided with a discharge port 9. The discharge port 9 is located below the inner cylinder 2, which facilitates the direct entry of crushed stone material into the inner cylinder 2. The discharge port 9 is located below the inner cylinder 2, which facilitates the finished product flowing out of the outer cylinder 1.

[0024] In one embodiment of this application, preferably, annular grooves 10 are fixedly connected to the inner walls of both ends of the outer cylinder 1, the cylinder wall of the inner cylinder 2 extends into the grooves 10, and the inner cylinder 2 is rotatably connected to the grooves 10 to prevent the gravel in the inner cylinder 2 from entering the outer cylinder 1, so that the sieve hole 7 becomes the only channel to enter the outer cylinder 1, and at the same time assists in supporting the weight of the inner cylinder 2.

[0025] In one embodiment of this application, preferably, a first motor 11 is fixedly connected to one end of the outer cylinder 1, the drive shaft of the first motor 11 is connected to the bushing 4, and a second motor 12 is fixedly connected to the other end of the outer cylinder 1, the drive shaft of the second motor 12 is connected to the rotating shaft 5, and the bushing 4 and the rotating shaft 5 rotate in opposite directions, which is used to drive the inner cylinder 2 and the rotating shaft 5 to rotate relative to each other, so that the crushing blade 6 and the blade holder 3 can bite and crush. The first motor 11 and the second motor 12 are low-speed high-torque motors or adapted reducers (both are prior art and will not be described in detail here).

[0026] In one embodiment of this application, preferably, the outer cylinder 1 is fixedly connected to a bracket 13 for supporting the outer cylinder 1.

[0027] In one embodiment of this application, preferably, the meshing surfaces of the blade holder 3 and the crushing blade 6 are both concave, which facilitates the blade holder 3 to receive the crushed stone when rotating, and at the same time, it forms a clamping mechanism with the crushing blade 6 when they are about to mesh.

[0028] In one embodiment of this application, preferably, there are three sets of blade holders 3 and two sets of crushing blades 6, so that sufficient space is provided between the blade holders 3 to allow the crushed stone to flow to the lower end, and at the same time, the blockage in the screen holes 7 is discharged when the crushed stone collides with the cylinder wall.

[0029] In summary, the crushing device for calcium carbonate powder production in the above embodiments of this utility model specifically involves feeding calcium carbonate crushed stone into the inner cylinder 2 through the feed inlet 8 at the high end of the outer cylinder 1. The first motor 11 and the second motor 12 are started to make the inner cylinder 2 and the rotating shaft 5 rotate simultaneously. The crushed stone rotates with the inner cylinder 2 and is supported by the cutter holder 3 during rotation. As the crushing blades 6 on the rotating shaft 5 rotate, they gradually engage with the cutter holder 3, cutting the crushed stone falling onto the cutter holder 3. The cut crushed stone continues to rotate with the inner cylinder 2. When it falls onto the cutter holder 3 again, smaller particles pass through the gaps between the crushing blades 6 on the cutter holder 3. Because the inner cylinder 2 is tilted with the outer cylinder 1, the crushed stone flows towards the direction where the gap between the cutter holders 3 is smaller, and is gradually cut... The crushed stones are made smaller until they can fall into the outer cylinder 1 through the screen holes 7. They are then screened step by step by the multi-stage cutter holders 3 with gradually decreasing spacing. The inclined inner cylinder 2 and outer cylinder 1 cause the crushed stones to move towards the denser crushing blades 6. Finally, the crushed stones that meet the particle size requirements are screened out through the screen holes 7 and flow out of the outer cylinder 1 through the discharge port 9. The crushed stones that do not meet the requirements are continuously crushed in stages by the crushing blades 6 and cutter holders 3. During the step-by-step crushing process, there is no need for external screening and re-feeding. At the same time, it also avoids the mixing and crushing of large and small stones together, thus improving the crushing efficiency. In addition, the crushed stones continuously impact the inner cylinder 2 as the inner cylinder 2 rotates between the cutter holders 3, which can shake off the powder blocking the screen holes 7 and prevent the screen holes 7 from clogging.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A crushing device for calcium carbonate powder production, characterized in that, The device includes an inclined outer cylinder, within which a rotating inner cylinder is provided. The inner cylinder is open at both ends, and multiple sets of cutter holders arranged in a circumferential array are fixedly connected inside the inner cylinder. Each set of cutter holders is arranged along the axial direction of the inner cylinder, and bushings are fixedly connected to both ends of the cutter holders. The bushings are rotatably connected to the outer cylinder. A rotating shaft is provided at the center of the inner cylinder, and the rotating shaft is rotatably connected to the bushings. Multiple sets of crushing blades that mesh with the cutter holders are fixedly connected to the rotating shaft. Screen holes are provided on the inner cylinder wall between two adjacent sets of cutter holders. The spacing between the cutter holders and the thickness of the crushing blades gradually decrease from the high end to the low end of the outer cylinder.

2. The crushing device for calcium carbonate powder production according to claim 1, characterized in that: The upper end of the outer cylinder is fixedly connected to the inlet at the opening of the inner cylinder, and the lower end of the outer cylinder is provided with an outlet at the bottom, which is located below the inner cylinder.

3. The crushing device for calcium carbonate powder production according to claim 1, characterized in that: The inner walls of both ends of the outer cylinder are fixedly connected to annular rail grooves, and the inner cylinder wall extends into the rail grooves, and the inner cylinder is rotatably connected to the rail grooves.

4. The crushing device for calcium carbonate powder production according to claim 1, characterized in that: One end of the outer cylinder is fixedly connected to a first motor, and the drive shaft of the first motor is connected to the bushing. The other end of the outer cylinder is fixedly connected to a second motor, and the drive shaft of the second motor is connected to the rotating shaft. The bushing and the rotating shaft rotate in opposite directions.

5. The crushing device for calcium carbonate powder production according to claim 1, characterized in that: The outer cylinder is fixedly connected to a bracket.

6. The crushing device for calcium carbonate powder production according to claim 1, characterized in that: The meshing surfaces of both the blade holder and the crushing blade are concave.

7. The crushing device for calcium carbonate powder production according to claim 1, characterized in that: The blade holder has three sets, and the crushing blade has two sets.

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