A nano-activated calcium carbonate crushing and screening device

Abstract

The present invention relates to the technical field of nano-active calcium carbonate preparation equipment, in particular to a nano-active calcium carbonate crushing and screening device, comprising a base frame and a body, a grading impeller is installed on the inner top of the body, the grading impeller comprises a shield, a central tube is arranged inside the shield, a threaded column is arranged at the bottom end of the central tube, a synchronous ring is arranged on the outer sleeve of the threaded column, a plurality of groups of first connecting ears are arranged on the outer wall of the synchronous ring, a hand wheel is connected to the lower end of the threaded column to abut against the lower end face of the synchronous ring, a plurality of groups of circumferentially distributed rotating shafts are rotatably connected to the outer wall of the shield, a second connecting ear is arranged at one end of the rotating shaft, the second connecting ear is hinged to the first connecting ear through a connecting rod, a moving blade is fixed at the other end of the rotating shaft, and a fixed blade fixedly connected to the outer wall of the shield is arranged between adjacent moving blades. When the synchronous ring is raised or lowered, it will pull or push the rotating shaft to rotate through the connecting rod, thereby deflecting the moving impeller, thereby adjusting the interval of the blades to meet the screening requirements of calcium carbonate particles of different particle sizes or specifications.

Description

Technical Field

[0001] The invention relates to the technical field of nano-active calcium carbonate preparation equipment, in particular to a nano-active calcium carbonate crushing and screening device. Background Art

[0002] Nano-active calcium carbonate is a calcium carbonate product with tiny particles and a large specific surface area, showing excellent activity and reactivity. In a wide range of industrial production, such as rubber, plastics, paints, coatings, papermaking and cosmetics, nano-active calcium carbonate is often used as a key additive because it can significantly enhance the mechanical properties of products, improve anti-aging properties, and beautify the appearance and texture of products.

[0003] The Chinese utility model patent with application number CN201721439283.5 discloses an ultrafine heavy calcium carbonate vertical mill: including a feeder, a feeding pipe, a rocker arm, a powder classifier, a grinding roller, a grinding disc, a reducer, and a motor; the feeder is connected to the feeding pipe; a baffle is provided at the bottom of the feeder; the feeder and the feeding pipe are separated by a baffle; the inside of the feeding pipe is a spiral design.

[0004] In the above process, the classifier plays the role of a screening wheel, but its design feature is that the spacing of the blades on it is fixed. This design means that the classifier can only effectively screen out particles that meet specific specifications or particle size requirements. In other words, it is highly specific to screening calcium carbonate particles of a specific size and cannot directly adapt to changes in demand for different particle size ranges. Summary of the invention

[0005] The object of the present invention is to provide a nanometer activated calcium carbonate crushing and screening device, which can adjust the blade spacing according to the required calcium carbonate particle size, aiming to improve the flexibility and versatility of the equipment to meet the screening requirements of particles of different specifications.

[0006] In order to solve the above technical problems, the present invention provides a nano-activated calcium carbonate crushing and screening device, comprising a base frame and a body arranged on the base frame, wherein a discharge port is arranged on an upper side of the body, a feed port is arranged on a middle side of the body, an air inlet is arranged on a lower side of the body, a second motor is fixed on the outer top of the body, and a grading impeller is installed on the inner top of the body; the grading impeller comprises a shield and a second spring, a central tube is arranged in the middle of the shield, a rotating rod is fixedly connected to the top of the central tube, one end of the rotating rod is fixedly connected to the output shaft of the second motor, and a threaded column is arranged on the bottom end of the central tube; The threaded column is covered with a synchronous ring, and the outer wall of the synchronous ring is provided with several groups of circumferentially distributed first connecting ears, the second spring is covered on the outer side of the threaded column and abuts between the synchronous ring and the center tube, and the lower end of the threaded column is connected to a handwheel that abuts against the lower end surface of the synchronous ring; the outer wall of the shield is rotatably connected with several groups of circumferentially distributed rotating shafts, one end of the rotating shaft is located inside the shield and is provided with a second connecting ear, the second connecting ear is hinged with a connecting rod, one end of the connecting rod is hinged to the first connecting ear, the other end of the rotating shaft is located outside the shield and is fixed with moving blades, and fixed blades fixedly connected to the outer wall of the shield are provided between adjacent moving blades.

[0007] Preferably, the machine body includes a top cover, an upper cylinder, a middle cylinder and a lower cylinder which are arranged in sequence from top to bottom, a first motor is fixed on the base frame, a grinding disc assembly fixedly connected to the output shaft of the first motor is arranged inside the lower cylinder, a plurality of grinding assemblies distributed around the middle cylinder are installed on the base frame, and the grinding end of the grinding assembly extends into the cylinder cavity of the middle cylinder and fits the grinding disc assembly.

[0008] Preferably, the grinding wheel assembly includes a lining plate and a base fixedly connected to the output shaft of the first motor, the lining plate is fan-shaped and is arranged in several groups, and the several groups of lining plates are installed around the upper end surface of the base, and the upper end surface of the base and the lower end surface of the lining plate are provided with several groups of corresponding deep holes, and a first spring is embedded between the upper and lower deep holes.

[0009] Preferably, a slag outlet is provided on one side of the bottom of the base, a support plate is fixed to the bottom of the base, and a scraper that fits the bottom wall of the lower cylinder is fixed to the support plate.

[0010] Preferably, bristles are provided at the bottom of the scraper.

[0011] Preferably, the air inlet is arranged on one side of the lower cylinder, and an air ring is embedded between the inner wall of the lower cylinder and the grinding disc assembly, and the air ring includes several groups of arc plates fixed to the inner wall of the lower cylinder, and several groups of the arc plates are connected in series end to end to form a ring structure, and the inner wall of the arc plate is provided with several groups of spirally twisted fan blades.

[0012] Preferably, the grinding assembly includes a support arm hinged on a base frame, one side of the support arm is hinged with a hydraulic cylinder, the other end of the hydraulic cylinder is hinged to the base frame, a third motor is provided at the end of the support arm, and the output end of the third motor is fixedly connected to a grinding roller that fits the grinding disc assembly.

[0013] Preferably, the side wall of the middle cylinder is provided with a plurality of groups of openings corresponding one-to-one with the support arms, and the support arms are provided with covers adapted to the openings.

[0014] Preferably, a first observation window is provided on the side wall of the middle cylinder, the feed port is provided on the side wall of the middle cylinder, and a feed discharge pipe pointing to the center of the grinding disc assembly is provided at one end of the feed port.

[0015] After adopting the above technical solution, the beneficial effects of the present invention are:

[0016] When the blade spacing needs to be adjusted, the hand wheel is rotated forward or reversely, causing the synchronizer ring to rise or fall along the threaded column. When the synchronizer ring rises or falls, it will pull or push the shaft to rotate through the connecting rod, thereby causing the impeller to deflect. The result of the deflection of the moving blades is to change their relative position with the fixed blades, thereby adjusting the blade spacing to meet the screening requirements of calcium carbonate particles of different sizes or specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective;

[0020] Figure 3 is a schematic diagram of the structure of the grinding assembly;

[0021] Figure 4 It is a structural schematic diagram of the grinding disc assembly;

[0022] Figure 5 It is the structural schematic diagram of the wind ring;

[0023] Figure 6 is a schematic diagram of the structure of the base;

[0024] Figure 7 It is a structural schematic diagram of the middle cylinder;

[0025] Figure 8 This is a schematic diagram of the installation of the grading impeller;

[0026] Fig. 9 is a structural schematic diagram of a grading impeller;

[0027] Fig.10 This is a schematic diagram of the handwheel installation.

[0028] Description of the accompanying drawings: 1-base, 2-first motor, 3-lower cylinder, 4-middle cylinder, 5-feeding port, 6-top cover, 7-second motor, 8-upper cylinder, 9-orifice, 10-grinding assembly, 11-air inlet, 12-discharging port, 13-first observation window, 14-base, 15-top plate, 16-support frame, 17-hydraulic cylinder, 18-grinding disc assembly, 19-support arm, 20-cover, 21-grinding roller, 22-slag outlet, 2 3-wind ring, 24-support plate, 25-scraper, 26-base, 27-lining plate, 28-arc plate, 29-fan blade, 30-deep hole, 31-first spring, 32-second observation window, 33-feeding pipe, 34-rotating rod, 35-shield, 36-moving blade, 37-fixed blade, 38-center tube, 39-second spring, 40-rotating shaft, 41-handwheel, 42-synchronizing ring, 43-connecting rod, 44-threaded column, 45-guide groove. DETAILED DESCRIPTION

[0029] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0030] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0031] like Figures 1 to 10As shown, an embodiment of the present invention provides a nano-activated calcium carbonate crushing and screening device, comprising a base frame 1, a grinding assembly 10, a grinding disc assembly 18, a body and a grading impeller. The device can adjust the blade spacing of the grading impeller according to the required calcium carbonate particle size, aiming to improve the flexibility and versatility of the device to meet the screening requirements of particles of different specifications.

[0032] The bottom frame 1 includes a top plate 15, and support frames 16 are arranged on both sides of the bottom of the top plate 15. A base 14 is arranged at the bottom of each support frame 16. The body is a multi-layer structure, including a top cover 6, an upper cylinder 8, a middle cylinder 4 and a lower cylinder 3 arranged in sequence from top to bottom.

[0033] The second motor 7 is fixedly mounted on the outer top of the top cover 6, and a discharge port 12 is provided on one side of the outer wall of the top cover 6. The grading impeller is arranged on the upper cylinder 8, and a second observation window 32 for observing the operating status of the grading impeller is provided on one side of the upper cylinder 8. The grading impeller includes a shield 35, and a central cylinder 38 is provided in the middle of the inner part of the shield 35. The top of the central cylinder 38 is fixedly connected to a rotating rod 34, and one end of the rotating rod 34 is fixedly connected to the output shaft of the second motor 7. A threaded column 44 is provided at the bottom end of the central cylinder 38, and a synchronous ring 42 is provided on the outer sleeve of the threaded column 44. The side wall of the threaded column 44 is provided with a plurality of guide grooves 45 distributed circumferentially and extending along the length direction of the threaded column 44, the inner side wall of the synchronous ring 42 is provided with a guide protrusion embedded in the guide groove 45, and the outer side wall of the synchronous ring 42 is provided with a plurality of groups of first connecting ears distributed circumferentially.

[0034] The outer wall of the shield 35 is rotatably connected to a plurality of circumferentially distributed rotating shafts 40, one end of which is located inside the shield 35 and is provided with a second connecting ear. The second connecting ear is hinged to a connecting rod 43, one end of which is hinged to the first connecting ear. The other end of the rotating shaft 40 is located outside the shield 35 and is fixed with moving blades 36, and fixed blades 37 fixedly connected to the outer wall of the shield 35 are provided between adjacent moving blades 36.

[0035] When the second motor 7 is started, the rotating rod 34 starts to rotate, and the shield 35 rotates together through the central tube 38, thereby driving the moving blades 36 and the fixed blades 37 to rotate. The threaded column 44 is sleeved with the second spring 39 and abuts between the synchronous ring 42 and the central tube 38. The lower end of the threaded column 44 is connected to a handwheel 41 that abuts against the lower end surface of the synchronous ring 42. When it is necessary to adjust the blade spacing, the handwheel 41 is rotated forward or reversely, and the synchronous ring 42 rises under the push of the handwheel 41 or descends under the push of the second spring 39. When the synchronous ring 42 rises and falls, it pulls or pushes the rotating shaft 40 to rotate through the connecting rod 43 hinged thereto, thereby deflecting the moving blades 36. The deflection of the moving blades 36 changes the relative position between the moving blades 36 and the fixed blades 37, thereby adjusting the blade spacing to meet the screening requirements of calcium carbonate particles of different particle sizes or specifications.

[0036] Since the fixed blade 37 is fixed, the fixed blade 37 is equivalent to a vertical straight blade. After the movable blade 36 is deflected, it is equivalent to an inclined blade. The distance between the end of the movable blade 36 close to the top cover 6 and the fixed blade 37 is gradually narrowed, forming a narrow tube effect. Due to the principle of the narrow tube effect, when the airflow passes through a narrow space, its speed will increase. Therefore, the narrow channel formed between the end of the movable blade 36 close to the top cover 6 and the fixed blade 37 is the area where the airflow is accelerated. As the airflow speed increases, the pressure in this area will also decrease accordingly, which helps to suck the calcium carbonate particles into the grading impeller and subject them to a stronger airflow, thereby improving the grading efficiency.

[0037] As another embodiment of the classification impeller, all the fixed blades 37 thereon are replaced with moving blades 36 to achieve synchronous adjustment of all blades. Since the spacing of the blades is achieved by the deflection of the moving blades 36, it is equivalent to that all the blades in the classification impeller are oblique blades. The oblique blade design makes the extreme difference of the particle turbulent kinetic energy and axial velocity smaller, and the flow field inside the classification impeller is more stable, which helps to improve the classification efficiency and accuracy. The oblique blades also produce a larger pressure difference, which is conducive to the discharge of material particles.

[0038] The number of grinding assemblies 10 is not less than two groups and is distributed around the middle cylinder 4. The side wall of the middle cylinder 4 is provided with a first observation window 13 and an orifice 9 corresponding to the grinding assemblies 10. The grinding assembly 10 includes a support arm 19 hinged on the top plate 15, and a third motor is provided at the end of the support arm 19. The output end of the third motor is fixedly connected to a grinding roller 21. A hydraulic cylinder 17 is hinged on one side of the support arm 19, and the other end of the hydraulic cylinder 17 is hinged to the base 14. During maintenance, the hydraulic cylinder 17 pulls the grinding roller 21 out of the barrel cavity of the middle cylinder 4 along the orifice 9, so that the operator can easily and quickly inspect and maintain the grinding assembly 10 or the grinding disc assembly 18. During normal operation, the hydraulic cylinder 17 pushes the grinding roller 21 into the barrel cavity of the middle cylinder 4 along the orifice 9, so that the grinding roller 21 fits with the grinding disc assembly 18, thereby ensuring the smooth progress of the grinding operation. The support arm 19 is provided with a cover 20 adapted to the orifice 9 so as to cover the orifice 9 during normal operation to prevent leakage and splashing of materials.

[0039] The side wall of the middle cylinder 4 is also provided with a feed port 5, and one end of the feed port 5 is provided with a feed pipe 33 pointing to the center of the grinding disc assembly 18. The grinding disc assembly 18 includes a liner 27 and a base 26 installed inside the lower cylinder 3, and the bottom of the top plate 15 is fixedly installed with a first motor 2, and the lower end of the base 26 is fixedly connected to the output shaft of the first motor 2. The liner 27 is fan-shaped and is provided in several groups, and several groups of liner 27 are installed around the upper end surface of the base 26. The upper end surface of the liner 27 is arc-shaped so as to fit the roller surface of the grinding roller 21. The upper end surface of the base 26 and the lower end surface of the liner 27 are both provided with several groups of one-to-one corresponding deep holes 30, and a first spring 31 is embedded between the upper and lower deep holes 30. Although the liner 27 is fixed to the base 26 by bolts, thanks to the addition of the first spring 31, the liner 27 can still float to a certain extent along the central axis of the bolt. This floating design not only enhances the adaptability of the grinding disc assembly 18 to accommodate material blocks of different sizes, but also effectively alleviates the impact and vibration generated during the grinding process, thereby extending the service life of the grinding roller 21 and the lining plate 27.

[0040] An air inlet 11 is provided on one side of the lower cylinder 3, and an air ring 23 is inlaid between the inner wall of the lower cylinder 3 and the base 26. The air ring 23 includes several groups of arc plates 28 fixed to the inner wall of the lower cylinder 3, and several groups of arc plates 28 are connected in series end to end to form a ring structure, and the inner wall of the arc plate 28 is provided with several groups of spirally twisted blades 29. A spirally twisted air duct is formed between two adjacent groups of blades 29, the inner wall of the arc plate 28 and the outer wall of the base 26. When the airflow enters the lower cylinder 3 from the air inlet 11, a spirally rising airflow will be formed in the middle cylinder 4 along the air duct. This spirally rising airflow enhances the ventilation effect of the grinding area, helps to discharge the ground powder more smoothly out of the system, thereby ensuring the cleanliness and efficiency of the grinding area.

[0041] A slag outlet 22 is provided at one side of the bottom of the lower cylinder 3, and a support plate 24 is fixed to the bottom of the base 26. A scraper 25 is fixed on the support plate 24 to fit the inner bottom wall of the lower cylinder 3, and bristles are provided at the bottom of the scraper 25. When the first motor 2 is started and drives the grinding disc assembly 18 to rotate, the scraper 25 also rotates. During the rotation process, the scraper 25 uses the bristles thereon to effectively clean out the materials and impurities that fall into the lower cylinder 3, and discharges the materials and impurities from the lower cylinder 3 through the slag outlet 22.

[0042] The discharge port 12 is connected to the bag collector and the induced draft fan in sequence through a pipeline. The external airflow generated by the blower and other equipment flows into the lower cylinder 3 from the air inlet 11, and then forms a spiral rising airflow inside the middle cylinder 4 under the guidance of the air ring 23. The first motor 2 starts and drives the base 26 to rotate, the second motor 7 starts and drives the classification impeller to rotate, and the third motor starts and drives the grinding roller 21 to rotate. The nano-active calcium carbonate agglomerates are put in from the feed port 5, and then fall into the center of the grinding disc assembly 18 through the discharge pipe 33. Under the action of centrifugal force, the nano-active calcium carbonate agglomerates that fall into the center of the grinding disc assembly 18 are quickly thrown to the outer edge of the grinding disc assembly 18, collide and crush with the rotating grinding roller 21, and are broken into fine particles. These particles are engulfed by the spiral airflow and float in the direction of the classification impeller. Under the negative pressure formed by the induced draft fan, the particles that meet the predetermined particle size are smoothly sucked into the inside of the classification impeller and collected through the bag collector. Some particles that do not meet the particle size are further crushed by the violent beating of the classifying impeller blades, and then sucked into the interior of the classifying impeller. Another part of the particles that do not meet the particle size are thrown to the periphery of the classifying impeller under the action of the centrifugal field of the classifying impeller, and then fall back to the crushing area along the side wall of the machine body.

[0043] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A nano-activated calcium carbonate crushing and screening device, comprising a base frame (1) and a body arranged on the base frame (1), characterized in that: The upper side of the machine body is provided with a discharge port (12), the middle side of the machine body is provided with a feed port (5), the lower side of the machine body is provided with an air inlet (11), the outer top of the machine body is fixed with a second motor (7), and the inner top of the machine body is installed with a grading impeller; the grading impeller comprises a shield (35) and a second spring (39), a center tube (38) is provided in the middle of the inner part of the shield (35), the top end of the center tube (38) is fixedly connected with a rotating rod (34), one end of the rotating rod (34) is fixedly connected with the output shaft of the second motor (7), and the bottom end of the center tube (38) is provided with a threaded column (44); the threaded column (44) is covered with a synchronous ring (42), and the outer wall of the synchronous ring (42) is provided with a plurality of groups of circumferentially divided impellers. The first connecting ear of the cloth, the second spring (39) is sleeved on the outside of the threaded column (44) and abuts between the synchronous ring (42) and the center tube (38), the lower end of the threaded column (44) is connected to a hand wheel (41) abutting against the lower end surface of the synchronous ring (42); the outer wall of the shield (35) is rotatably connected to a plurality of groups of circumferentially distributed rotating shafts (40), one end of the rotating shaft (40) is located inside the shield (35) and is provided with a second connecting ear, the second connecting ear is hinged to a connecting rod (43), one end of the connecting rod (43) is hinged to the first connecting ear, the other end of the rotating shaft (40) is located outside the shield (35) and is fixed with a moving blade (36), and a fixed blade (37) fixedly connected to the outer wall of the shield (35) is provided between adjacent moving blades (36).

2. The nano-activated calcium carbonate crushing and screening device according to claim 1, characterized in that: The machine body comprises a top cover (6), an upper cylinder (8), a middle cylinder (4) and a lower cylinder (3) which are arranged in sequence from top to bottom; a first motor (2) is fixed on the base frame (1); a grinding disc assembly (18) which is fixedly connected to an output shaft of the first motor (2) is arranged inside the lower cylinder (3); a plurality of grinding assemblies (10) which are distributed around the middle cylinder (4) are mounted on the base frame (1); a grinding end of the grinding assembly (10) extends into the cylinder cavity of the middle cylinder (4) and fits the grinding disc assembly (18).

3. The nano-activated calcium carbonate crushing and screening device according to claim 2 is characterized in that: The grinding disc assembly (18) comprises a liner (27) and a base (26) fixedly connected to the output shaft of the first motor (2); the liner (27) is fan-shaped and is arranged in a plurality of groups; the plurality of groups of liner (27) are mounted around the upper end surface of the base (26); the upper end surface of the base (26) and the lower end surface of the liner (27) are both provided with a plurality of groups of deep holes (30) corresponding to each other; a first spring (31) is embedded between the upper and lower deep holes (30).

4. The nano-activated calcium carbonate crushing and screening device according to claim 3 is characterized in that: A slag outlet (22) is provided at one side of the bottom of the base (26), a support plate (24) is fixed to the bottom of the base (26), and a scraper (25) that fits the inner bottom wall of the lower cylinder (3) is fixed to the support plate (24).

5. The nano-activated calcium carbonate crushing and screening device according to claim 4 is characterized in that: Brush bristles are arranged at the bottom of the scraper (25).

6. The nano-activated calcium carbonate crushing and screening device according to claim 2, characterized in that: The air inlet (11) is arranged on one side of the lower cylinder (3); an air ring (23) is embedded between the inner wall of the lower cylinder (3) and the grinding disc assembly (18); the air ring (23) comprises a plurality of groups of arc plates (28) fixed to the inner wall of the lower cylinder (3); the plurality of groups of arc plates (28) are connected in series end to end to form a ring structure; the inner wall of the arc plate (28) is provided with a plurality of groups of spirally twisted blades (29).

7. The nano-activated calcium carbonate crushing and screening device according to claim 2 is characterized in that: The grinding assembly (10) comprises a support arm (19) hinged on a base frame (1), a hydraulic cylinder (17) being hinged on one side of the support arm (19), the other end of the hydraulic cylinder (17) being hinged to the base frame (1), a third motor being arranged at the end of the support arm (19), and a grinding roller (21) being fixedly connected to the grinding disc assembly (18) at the output end of the third motor.

8. The nano-activated calcium carbonate crushing and screening device according to claim 7, characterized in that: The side wall of the middle cylinder (4) is provided with a plurality of groups of holes (9) corresponding one-to-one with the support arms (19), and the support arms (19) are provided with sealing covers (20) adapted to the holes (9).

9. The nano-activated calcium carbonate crushing and screening device according to claim 7, characterized in that: The side wall of the middle cylinder (4) is provided with a first observation window (13), the feed port (5) is provided on the side wall of the middle cylinder (4), and one end of the feed port (5) is provided with a feed pipe (33) pointing to the center of the grinding disc assembly (18).

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