Centrifugal separation device of horizontal grinding and vertical separation sand mill and sand mill

Abstract

The invention discloses a centrifugal separation device of a horizontal type grinding and vertical type separation sand mill, and discloses a sand mill with the centrifugal separation device of the horizontal type grinding and vertical type separation sand mill, the centrifugal separation device of the horizontal type grinding and vertical type separation sand mill comprises a separation cylinder, a centrifugal separation wheel, a mounting plate and a propelling block, a spiral groove is formed in the inner wall of the separating cylinder and is in butt joint with a discharging port of the grinding cylinder, and the spiral groove can guide materials containing grinding media to spirally sink. The centrifugal separation wheel is designed in the same rotating direction as the spiral groove, the wave-shaped rim of the centrifugal separation wheel forms a discharging channel at the wave trough, and a discharging cavity is formed in the wheel; during working, the wheel body endows materials with tangential speed through the wave crest part to realize uniform dispersion, and a grinding medium is cast to the cylinder wall to enter the spiral groove, so that the medium is effectively prevented from entering the discharging cavity.

Description

Technical Field

[0001] The invention relates to the technical field of grinding equipment, in particular to a centrifugal separation device of a horizontal grinding vertical separation sand mill and a sand mill. Background Art

[0002] A sand mill is a machine that grinds materials by driving the grinding rotor to cause the grinding media to collide and squeeze with the material.

[0003] However, in previous sand mills, the ground material would be mixed with the grinding media and enter the centrifugal separation device, causing the centrifugal separation device to be blocked and inconvenient to discharge the material, or the grinding media would run out and cause a lack of grinding media inside the grinding cylinder, resulting in a poor grinding effect. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a centrifugal separation device for a horizontal grinding and vertical separation sand mill, which can effectively separate the ground material and the grinding medium, thereby improving the grinding efficiency and grinding quality.

[0005] The present invention also provides a sand mill having a centrifugal separation device of the horizontal grinding vertical separation sand mill.

[0006] According to the first embodiment of the present invention, a centrifugal separation device of a horizontal grinding and vertical separation sand mill includes a separation cylinder, a centrifugal separation wheel, a mounting plate and a propulsion block. A spiral groove is provided on the inner peripheral wall of the separation cylinder. The separation cylinder is used to provide a separation space. The spiral groove is used to guide the material near the cylinder wall to spirally flow downward with the grinding medium; the centrifugal separation wheel is rotatably arranged in the separation cylinder, and the rotation direction of the centrifugal separation wheel is the same as that of the spiral groove. A discharge cavity is provided in the middle of the centrifugal separation wheel, and the rim of the centrifugal separation wheel is provided in a wave shape and a discharge channel is provided at the trough of the wave. The inner cavity of the separation cylinder is connected to the discharge cavity through the discharge channel. When the centrifugal separation wheel rotates, the material is driven by the relative pressure difference between the inside and the outside. The material flows down into the discharge chamber through the discharge channel. The centrifugal separation wheel is used to separate the material and the grinding medium, and give the grinding medium and the material a rotational tangential velocity component, and cooperate with the separation cylinder to reduce the escape of the grinding medium; the mounting plate is connected to the lower end of the centrifugal separation wheel, and the mounting plate and / or the lower end of the centrifugal separation wheel are provided with radially protruding protrusions, which are evenly distributed around the circumference. The protrusions are used to block the grinding medium and differentiate the local dynamic pressure; the propulsion block is connected to the lower end of the mounting plate, and the propulsion block is provided with an inclined front face. When the centrifugal separation wheel rotates, the front face can give the grinding medium a downward velocity component to increase the scalar difference in relative motion velocity between the material and the grinding medium.

[0007] It has at least the following beneficial effects: When the centrifugal separation wheel is rotated, the wavy protrusions can impart a velocity component to the material along the circumference of the protruding curve, thereby evenly dispersing the material and throwing the grinding medium along the tangent to the inner wall of the separation cylinder, so that most of the grinding medium falls back into the grinding cylinder under the guidance of the spiral groove wire, thereby preventing the grinding medium from entering the discharge cavity inside the centrifugal separation wheel and reducing the probability of the grinding medium escaping. The spiral groove cooperates with the wavy centrifugal separation wheel to improve the separation efficiency of the material and the grinding medium; when the propulsion block rotates with the centrifugal separation wheel, the front surface of the propulsion block can impart a vertical downward velocity component to the material and the grinding medium. The oncoming impact of the propulsion block can simultaneously impart a velocity component to the material and the grinding medium in the tangential direction of the rotating circle. Due to the large difference in density and fineness between the material and the grinding medium, the relative speed difference between the grinding medium and the material is widened under the energizing effect of the oncoming impact of the propulsion block, providing the grinding medium with an initial velocity condition in the same direction as gravity when falling back to the horizontal grinding chamber, thereby reducing the probability of the grinding medium entering the discharge chamber from the discharge channel; the dynamic pressure of the material on the outer peripheral side of the protrusion increases as it rotates, and under the action of the relative pressure difference, it effectively blocks the grinding medium from entering the area where the centrifugal separation wheel above the protrusion is located, thereby reducing the probability of the grinding medium escaping.

[0008] According to some embodiments of the present invention, the centrifugal separation wheel includes a connecting disc, an impeller, and a fixed plate that are coaxially arranged and connected in sequence from top to bottom. The connecting disc is rotatably arranged in the separation cylinder. The connecting disc is used to connect to a hollow shaft motor. The hollow shaft of the hollow shaft motor is connected to the discharge chamber, and the hollow shaft motor is used to drive the connecting disc to rotate. One end of the impeller is connected to the connecting disc. The impeller includes a plurality of turbine-shaped distributed blades. The inner ends of the plurality of blades are arranged around the discharge chamber, and the outer ends of the plurality of blades are distributed in a wave shape along the circumferential direction of the base circle where the turbine is located. A trough is formed between adjacent blades, and the gap between adjacent blades is the discharge channel. The fixed plate is connected to the other end of the impeller, and the protrusion is arranged on the peripheral wall of the fixed plate.

[0009] According to some embodiments of the present invention, the mounting plate and the fixing plate are spaced apart in the axial direction, and both the mounting plate and the fixing plate are provided with protrusions extending in the radial direction, and the protrusions of the mounting plate and the protrusions of the fixing plate are staggered in the circumferential direction.

[0010] According to some embodiments of the present invention, a plurality of spiral grooves are provided, the plurality of spiral grooves are evenly distributed along the circumference of the separation cylinder, and the plurality of spiral grooves have the same rotation direction.

[0011] According to some embodiments of the present invention, the protrusion is arc-shaped, and the protrusion of the mounting plate and the protrusion of the fixing plate are staggered by 45°.

[0012] According to some embodiments of the present invention, four thrust blocks are provided, and the four thrust blocks are evenly distributed around the circumference of the mounting plate. The angle between the front surface of the thrust block and the plate surface of the mounting plate is between 30° and 90°, and the angle between the intersection point of the length extension line of the thrust block and the diameter of the mounting plate on the base circle of the mounting plate is between 0° and 60°.

[0013] According to some embodiments of the present invention, the width of the discharge channel narrows from the inside to the outside.

[0014] According to some embodiments of the present invention, a fixing hole is provided at the lower end of the mounting plate, and the fixing hole is used to fix the hollow rotating shaft.

[0015] According to the second embodiment of the present invention, the sand mill includes the centrifugal separation device of the horizontal grinding and vertical separation sand mill according to the first embodiment of the present invention, and also includes a grinding cylinder and a grinding rotor, the axis of the grinding cylinder is parallel to the horizontal plane, the grinding cylinder is provided with a feed port and a discharge port, the discharge port is arranged upward, and the discharge port is arranged in the second quadrant area of the grinding cylinder along the rotation direction; the grinding rotor is rotatably arranged in the grinding cylinder and is coaxially arranged with the grinding cylinder, and the grinding rotor is used to grind the material; the lower end of the separation cylinder is connected to the discharge port of the grinding cylinder, and the separation cylinder is connected to the discharge port. The centrifugal separation device of the horizontal grinding and vertical separation sand mill is used to separate the material and the grinding medium.

[0016] At least the following beneficial effects are achieved: this sand mill has all the beneficial effects brought about by the centrifugal separation device of the above-mentioned horizontal grinding and vertical separation sand mill, which will not be repeated here.

[0017] According to some embodiments of the present invention, the grinding cylinder is connected to the separation cylinder through a reducing tube, the lower end of the reducing tube is connected to the grinding cylinder and connected to the discharge port, the contour of the discharge port is smaller than the contour of the lower end of the reducing tube, the discharge port is located relatively below the contour of the lower end of the reducing tube, the upper end of the reducing tube is connected to the lower end of the separation cylinder, and the diameter of the reducing tube gradually decreases from both ends to the middle.

[0018] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which: Figure 1 Schematic diagram of the structure of a sand mill according to an embodiment of the present invention; Figure 2 An exploded view of a sand mill according to an embodiment of the present invention; Figure 3 Schematic diagram of the structure of the centrifugal separation wheel of the horizontal grinding and vertical separation sand mill according to an embodiment of the present invention; Figure 4 This is a schematic structural diagram of a centrifugal separation wheel of a horizontal grinding and vertical separation sand mill according to an embodiment of the present invention, viewed from above; Figure 5 Schematic diagram of a centrifugal separation wheel of a horizontal grinding and vertical separation sand mill according to an embodiment of the present invention, cut along the axis; Figure 6 Schematic diagram of the structure of the grinding rotor of the horizontal grinding and vertical separation sand mill according to an embodiment of the present invention; Figure 7 Schematic diagram of the flow of grinding material in the grinding rotor of the horizontal grinding vertical separation sand mill according to an embodiment of the present invention; Figure 8 is a schematic structural diagram of a second grinding block according to an embodiment of the present invention; Figure 9 This is a schematic structural diagram of the assembly of the grinding cylinder and the reducing tube according to an embodiment of the present invention; Figure 10 An exploded view of the assembly of the grinding cylinder and the reducer according to an embodiment of the present invention; Figure 11 This is a left side view of the assembly of the grinding cylinder and the reducer according to an embodiment of the present invention.

[0020] Reference numerals: Separating cylinder 100, spiral groove 110; Centrifugal wheel 200, connecting disc 210, impeller 220, blades 221; Fixed plate 230, discharge cavity 240, discharge channel 250; Hollow shaft motor 260, hollow rotating shaft 261; Mounting plate 300, fixing holes 310; Propelling block 400, facing surface 410, protruding portion 500; Grinding cylinder 600, feed port 610, discharge port 620; Rotor body 710, first grinding area 711, second grinding area 712, third grinding area 713; A first grinding unit 720 and a first grinding block 721; Second grinding unit 730, second grinding block 731, through hole 731a; A third grinding unit 740 and a third grinding block 741; Reducer 800. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0022] In the description of the present invention, if there is a description of first and second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features. "Several" means at least one.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0024] Reference Figures 1 to 11 The present invention discloses a centrifugal separation device for a horizontal grinding and vertical separation sand mill, comprising a separation barrel 100, a centrifugal separation wheel 200, a mounting plate 300 and a propulsion block 400. A spiral groove 110 is provided on the inner circumferential wall of the separation barrel 100. The separation barrel 100 is used to provide a separation space, and the spiral groove 110 is used to guide the material near the barrel wall to carry the grinding medium and flow spirally downward. The centrifugal separation wheel 200 is rotatably arranged in the separation cylinder 100. The centrifugal separation wheel 200 has the same rotation direction as the spiral groove 110. A discharge cavity 240 is set in the middle of the centrifugal separation wheel 200. The rim of the centrifugal separation wheel 200 is set in a wave shape. A discharge channel 250 is set in the trough of the wave-shaped centrifugal separation wheel 200. The inner cavity of the separation cylinder 100 is connected to the discharge cavity 240 through the discharge channel 250. When the centrifugal separation wheel 200 rotates, the material flows into the discharge cavity 240 through the discharge channel 250 under the drive of the relative pressure difference between the inside and the outside. The centrifugal separation wheel 200 is used to separate the material and the grinding medium, and give the grinding medium and the material a rotational tangential velocity component, and cooperate with the separation cylinder 100 to further reduce the probability of the grinding medium escaping.

[0025] Reference Figure 3 and Figure 4The mounting plate 300 is connected to the lower end of the centrifugal wheel 200. The mounting plate 300 and / or the lower end of the centrifugal wheel 200 is provided with a radially protruding protrusion 500. The protrusions 500 are evenly distributed around the circumference. The protrusions 500 serve to block the grinding medium and differentiate the local dynamic pressure. The propulsion block 400 is connected to the lower end of the mounting plate 300. The propulsion block 400 is provided with an inclined front surface 410. When the centrifugal wheel 200 rotates, the front surface 410 can give the material and the grinding medium a downward velocity component, thereby increasing the relative motion velocity scalar difference between the material and the grinding medium.

[0026] It should be understood that when the centrifugal separation wheel 200 is rotated, the wavy protrusion 500 can impart a velocity component to the material along the tangential direction of the convex curve, thereby evenly dispersing the material and throwing the grinding medium along the tangent to the inner wall of the separation cylinder 100, so that most of the grinding medium falls back into the grinding cylinder 600 under the guidance of the spiral groove 110 wire, thereby preventing the grinding medium from entering the discharge cavity 240 inside the centrifugal separation wheel 200 and reducing the probability of the grinding medium escaping. The spiral groove 110 cooperates with the wavy centrifugal separation wheel 200 to improve the separation efficiency of the material and the grinding medium; when the propulsion block 400 rotates with the centrifugal separation wheel 200, the front surface of the propulsion block 400 can impart a velocity component to the material and the grinding medium. The vertically downward velocity component, the oncoming surface of the propulsion block 400 can also impart a velocity component to the material and the grinding medium along the tangential direction of the rotating circle. Due to the large difference in density and fineness between the material and the grinding medium, the relative velocity difference between the grinding medium and the material is widened under the oncoming impact energizing action of the propulsion block 400, providing the grinding medium with an initial velocity condition in the same direction as the gravity for falling back to the horizontal grinding chamber, thereby reducing the probability of the grinding medium entering the discharge chamber 240 from the discharge channel 250; the dynamic pressure of the material on the outer peripheral side of the protrusion 500 increases when it follows the rotation, and under the action of the relative pressure difference, the grinding medium is effectively blocked from entering the area where the centrifugal separation wheel 200 is located above the protrusion 500, thereby reducing the probability of the grinding medium escaping.

[0027] It can be understood that when the sand mill is working, the centrifugal separation wheel 200 rotates at high speed, giving the grinding medium a speed tangential to the rotating circumference. When the material contacts the spiral groove 110, under the action of viscosity, the material flows in the spiral direction. At the same time, the material can carry the grinding medium to move spirally downward, which is conducive to the grinding medium falling back to the horizontal grinding cavity of the grinding cylinder 600; when the grinding medium moves upward along the wall of the separation cylinder, its movement trajectory is extended by the spiral groove 110 and intersects with the material flowing downward along the spiral, further increasing the difficulty of the grinding medium entering the centrifugal separation discharge area. The so-called centrifugal separation discharge area is the area of the separation cylinder 100 where the centrifugal separation wheel 200 is located. The separation cylinder 100 and the centrifugal separation wheel 200 work together to effectively prevent the grinding medium from entering the centrifugal separation discharge area, thereby realizing ball separation, i.e. avoiding ball leakage.

[0028] It is understandable that the width of the side of the discharge channel 250 close to the cavity of the separation cylinder 100 is smaller than that of the grinding medium, thereby preventing the grinding medium from escaping.

[0029] Reference Figures 2 to 5 The centrifugal wheel 200 includes a coaxially arranged connecting disc 210, an impeller 220, and a fixed plate 230, which are sequentially connected from top to bottom. The connecting disc 210 is disposed within the separation drum 100 and is used to connect to a hollow shaft motor 260. The hollow shaft 261 of the hollow shaft motor 260 is connected to the discharge chamber 240, and the hollow shaft motor 260 is used to drive the connecting disc 210 to rotate. One end of the impeller 220 is connected to the connecting disc 210. The impeller 220 includes a plurality of turbine-shaped distributed blades 221. The inner ends of the blades 221 are arranged around the discharge chamber 240, and the outer ends of the blades 221 are distributed in a wave shape along the circumference of the turbine base circle. A trough is formed between adjacent blades 221, and the gap between adjacent blades 221 forms a discharge channel 250. The fixed plate 230 is connected to the other end of the impeller 220, and the protrusion 500 is set on the peripheral wall of the fixed plate 230. The structure of the centrifugal separation wheel 200 is simple. The impeller 220 serves as the main separation component of the centrifugal separation wheel 200. Through continuous relative scouring and peeling, the material and the grinding medium are effectively separated in the discharge channel 250. The turbine-shaped distribution blades 221 ensure that the discharge process is uniform and smooth.

[0030] In some embodiments, the mounting plate 300 and the fixing plate 230 are axially spaced apart, and both the mounting plate 300 and the fixing plate 230 are provided with radially extending protrusions 500, and the protrusions 500 of the mounting plate 300 and the protrusions 500 of the fixing plate 230 are staggered in the vertical projection circumferential direction. The outer peripheral wall of the fixed plate 230 is provided with a plurality of first protrusions 500, and the plurality of first protrusions 500 are evenly distributed along the circumference of the fixed plate 230. The mounting plate 300 and the fixed plate 230 are axially spaced apart. The outer peripheral wall of the mounting plate 300 is provided with a plurality of second protrusions 500, and the plurality of second protrusions 500 are evenly distributed along the circumference of the mounting plate 300. The first protrusions 500 and the second protrusions 500 are staggered in the circumferential direction of the vertical projection of the separation cylinder 100. The staggered distribution of the protrusions 500 can make the dynamic pressure distribution of the materials on the outer peripheral sides of the upper and lower plates more uniform, and cooperate with the separation cylinder 100 and the impeller 220 to improve the separation effect of the zirconium balls. It can be understood that the protrusions 500 cannot completely close the separation cylinder 100. When the mounting plate 300 and the fixed plate 230 rotate synchronously, the protrusions 500 have a greater energizing effect on the grinding media with relatively larger particle size and weight, that is, the kinetic energy of the grinding media is increased more.

[0031] It is understandable that the width of the discharge channel 250 on the side close to the separation cylinder 100 cavity is smaller, thereby reducing the probability of the grinding medium escaping.

[0032] Reference Figure 2 The spiral grooves 110 are provided in a plurality and are evenly distributed along the circumference of the separation barrel 100. The spiral grooves 110 have the same rotation direction. The protrusion 500 is arc-shaped, and the protrusion 500 of the mounting plate 300 and the protrusion 500 of the fixing plate 230 are offset by 45 degrees.

[0033] Reference Figure 3 and Figure 4 There are four pusher blocks 400, which are evenly distributed around the circumference of the mounting plate 300. The angle between the front face 410 of the pusher block 400 and the surface of the mounting plate 300 is between 30° and 90°. The angle threshold between the length extension line of the pusher block 400 and the diameter line on the mounting plate 300 passing through the bottom centroid of the pusher block 400 on the vertical projection plane is between 0° and 60°. The width of the discharge channel 250 narrows from the inside to the outside. The lower end of the mounting plate 300 is provided with a fixing hole 310 for the hollow rotating shaft 261. A sand mill includes a centrifugal separation device of a horizontal grinding and vertical separation sand mill, and also includes a grinding cylinder 600 and a grinding rotor. The axis of the grinding cylinder 600 is parallel to the horizontal plane. The grinding cylinder 600 is provided with a feed port 610 and a discharge port 620. The discharge port 620 is arranged upward and is arranged in the second quadrant area of the grinding cylinder 600 along the rotation direction; the grinding rotor is rotatably arranged in the grinding cylinder 600 and is arranged coaxially with the grinding cylinder 600, and the grinding rotor is used to grind materials; the lower end of the separation cylinder 100 is connected to the discharge port 620 of the grinding cylinder 600, and the separation cylinder 100 is connected to the discharge port 620. The centrifugal separation device of the horizontal grinding and vertical separation sand mill is used to separate materials and grinding media.

[0034] Reference Figure 10 and Figure 11 The grinding cylinder 600 is connected to the separation cylinder 100 through the reducer 800. The lower end of the reducer 800 is connected to the grinding cylinder 600 and is connected to the discharge port 620. The outline of the discharge port 620 is smaller than the outline of the lower end of the reducer 800. The discharge port 620 is located relatively below the outline of the lower end of the reducer 800. The upper end of the reducer 800 is connected to the lower end of the separation cylinder 100. The diameter of the reducer 800 gradually decreases from both ends to the middle.

[0035] It can be understood that the area where the reducer 800 intersects with the grinding cylinder 600 is larger than the area of the discharge port 620, and the distance between the position of the centroid of the discharge port 620 and the perpendicular bisector of the grinding cylinder 600 is d. The perpendicular bisector passes through the axis of the grinding cylinder 600. The distance between the middle of the discharge port 620 and the perpendicular bisector of the grinding cylinder 600 is greater than the distance between the two side positions and the perpendicular bisector of the grinding cylinder 600. The vertical projection of the discharge port 620 is in the shape of a smile connected by arcs of different curvature radii. Because the discharge port 620 is arranged in the second quadrant area of the grinding cylinder 600 along the rotation direction, the zirconium balls (grinding media) tend to move obliquely downward when they move to the discharge port 620 position during the rotation of the rotor body 710. Therefore, the greater the distance between the discharge port 620 and the vertical bisector of the grinding cylinder 600, the greater the vertical component of the zirconium ball velocity. Due to the existence of inertia, the lower the ratio of the zirconium balls entering the centrifugal separation device of the vertical horizontal grinding vertical separation sand mill. The opening distance in the middle of the discharge port 620 is greater than the opening distance on both sides, which can maximize the effective separation area and reduce the probability of the zirconium balls entering the separation cylinder 100; the intersection area of the reducer 800 and the grinding cylinder 600 is greater than the area of the discharge port 620. Under the action of gravity and the drag force of the relative movement of the material and the zirconium balls, the zirconium balls entering the separation area are helped to fall back to the grinding cylinder 600, reducing the probability of the zirconium balls entering the separation cylinder 100. The flow rate in the small-diameter portion in the middle of the reducer 800 is higher than that at the two ends. The greater the scalar difference in the relative motion velocity between the material and the grinding medium, the greater the viscous force on the grinding medium, and the greater the kinetic energy required to enter the vertical separation drum 100. In addition, the pipe at the bottom of the reducer 800 is in an eight-shaped shape (narrowing from bottom to top to the middle). After the grinding medium collides and rebounds from the pipe wall, its vertical upward velocity component is reduced, which can effectively reduce the probability of the grinding medium entering the vertical separation drum 100. The top pipe is in an inverted eight-shaped shape (narrowing from top to bottom to the middle). Under the action of gravity and drag, it helps the grinding medium fall back into the horizontally arranged grinding drum 600.

[0036] Reference Figures 6 to 11 The grinding rotor is installed on the grinding cylinder 600, and the grinding cylinder 600 is provided with a feed port 610 and a discharge port 620. The grinding cylinder 600 is used to load materials and grinding media. The grinding rotor includes a rotor body 710, a first grinding unit 720, a second grinding unit 730 and a third grinding unit 740.

[0037] Reference Figure 6 and Figure 7The rotor body 710 is sequentially provided with a first grinding zone 711, a second grinding zone 712, and a third grinding zone 713 along the axial direction of the rotor body 710. The first grinding zone 711 is located near the feed inlet 610 of the grinding drum 600, and the third grinding zone 713 is located near the discharge outlet 620 of the grinding drum 600. First grinding units 720 are provided in the first grinding zone 711. Several first grinding units 720 are arranged and staggered along the axial direction of the rotor body 710. When the rotor body 710 rotates, the first grinding units 720 at both ends of the first grinding zone 711 are used to provide opposite velocity components to the grinding medium, while the first grinding units 720 in the middle of the first grinding zone 711 are used to provide velocity components toward the feed inlet 610 or toward the discharge outlet 620 to the grinding medium. The second grinding units 730 are disposed in the second grinding zone 712. Several of the second grinding units 730 are arranged and staggered along the axial direction of the rotor body 710. The second grinding units 730 are used to separate the first grinding zone 711 from the third grinding zone 713. When the rotor body 710 rotates, the second grinding units 730 are used to provide a velocity component for the grinding medium toward the feed inlet 610. The third grinding units 740 are disposed in the third grinding zone 713. Several of the third grinding units 740 are arranged and staggered along the axial direction of the rotor body 710. When the rotor body 710 rotates, the third grinding units 740 are used to provide a velocity component for the grinding medium toward the feed inlet 610.

[0038] It should be understood that when the rotor body 710 rotates, it drives the grinding media to collide, squeeze, rub and shear with each other to grind the material. The first grinding units 720 at both ends of the first grinding zone 711 provide opposite velocity components to the grinding media, effectively avoiding the accumulation of grinding media in the areas around the feed port 610 and the discharge port 620, reducing the grinding dead zone, reducing the wear of the grinding media on the cover plate at the feed port 610 or the discharge port 620 of the grinding cylinder 600, and increasing the residence period of the grinding media in the first grinding zone 711, ensuring sufficient grinding and improving the grinding fineness; the first grinding unit 720 in the middle of the first grinding zone 711 provides the grinding media with a velocity component toward the feed port 610 or toward the discharge port 620, increasing the collision frequency between the grinding media and between the grinding media and the cylinder wall, thereby improving the grinding efficiency. The second grinding zone 712 separates the first grinding zone 711 from the third grinding zone 713 and imparts a velocity component to the grinding media toward the feed port 610, shortening the localized circulation and relative residence period of the grinding media at the discharge port 620. The third grinding units 740 of the third grinding zone 713 impart a velocity component to the grinding media toward the feed port 610 during rotation, effectively preventing accumulation of grinding media around the discharge port 620 and promoting its circulation within the chamber, reducing the likelihood of the grinding media entering the separation zone. The three grinding zones each have distinct functions, enhancing grinding efficiency and grinding fineness to meet complex and sophisticated grinding needs.

[0039] Reference Figure 6 and Figure 7 The first grinding unit 720 includes a plurality of first grinding blocks 721 distributed along the circumference of the rotor body 710. The front surface of the first grinding block 721 near the feed port 610 faces the feed port 610, and the front surface of the first grinding block 721 near the discharge port 620 faces the discharge port 620. The front surfaces of the first grinding blocks 721 in the first grinding unit 720 in the middle of the first grinding area 711 alternately face the feed port 610 and the discharge port 620. Two first grinding blocks 721 adjacent to each other in the axial direction of the rotor body 710 are staggered at a predetermined angle in the circumferential direction. The second grinding unit 730 includes a plurality of first grinding blocks 721 distributed along the circumference of the rotor body 710. The rotor body 710 includes a plurality of second grinding segments 731 distributed along the circumference of the rotor body 710, with the front surfaces of the second grinding segments 731 facing the feed inlet 610. Axially adjacent second grinding segments 731 along the rotor body 710 are staggered at a predetermined angle in the circumferential direction. The third grinding unit 740 includes a plurality of third grinding segments 741 distributed along the circumference of the rotor body 710, with the front surfaces of the third grinding segments 741 facing the discharge outlet 620. Axially adjacent third grinding segments 741 along the rotor body 710 are staggered at a predetermined angle in the circumferential direction. The height of the second grinding segments 731 is greater than that of the first grinding segments 721, and the height of the first grinding segments 721 is greater than that of the third grinding segments 741. The so-called height refers to the length of the protrusion along the radial outermost end of the rotor body 710.

[0040] It can be understood that the so-called head-on surface is the side that first contacts the material along the direction of rotation. The head-on surfaces of the first grinding block 721 and the third grinding block 741 are both curved surfaces of waist-shaped blocks, and the grinding medium is zirconium balls. The first grinding block 721 at the rightmost end of the first grinding zone 711 faces the feed port 610, while the waist straight surface of the first grinding block 721 faces the discharge port 620. The waist straight surface gives the zirconium balls a velocity component in the axial direction toward the discharge port 620, effectively avoiding the accumulation of zirconium balls in the area around the feed port 610 and reducing their wear on the cover plate of the grinding cylinder 600 at the feed port 610. The first grinding block 721 at the leftmost end of the first grinding zone 711 faces the discharge port 620, thereby realizing local circulation grinding of the zirconium balls in the first grinding zone 711. The first grinding blocks 721 adjacent in the axial and radial directions in the middle part of the first grinding zone 711 face each other alternately, which can increase the collision frequency between the zirconium balls and the uniform dispersion of the material, thereby improving the grinding efficiency.

[0041] It should be noted that the height of the second grinding block 731 in the second grinding area 712 is higher than the grinding blocks in the other grinding areas, that is, the linear velocity of the outer end of the second grinding block 731 is higher than that in other areas. The second grinding block 731 can effectively separate the first grinding area 711 and the third grinding area 713. Because of the head-on setting direction of the second grinding block 731, the second grinding block 731 gives the zirconium balls a velocity component toward the feed port 610, shortening the local circulation period of the zirconium balls on the side of the discharge port 620. The cross-sectional area of the second grinding block 731 is larger than that of the grinding blocks in the other areas, which can effectively extend the flow trajectory of the material and improve the uniformity of grinding.

[0042] It can be understood that the third grinding block 741 of the third grinding area 713 is installed obliquely, which increases the velocity component it imparts to the zirconium balls toward the feed port 610 during rotation, and can effectively prevent the zirconium balls from accumulating on the side of the discharge port 620. The axially adjacent third grinding blocks 741 are staggered, which can improve the continuity of the velocity component of the zirconium balls toward the feed port 610, thereby shortening the relative residence period of the zirconium balls in the discharge port 620 area. Finally, the height of the third grinding block 741 is lower than the height of the grinding blocks in other areas, which can reduce the initial velocity of the zirconium balls at the discharge port 620 end, and further reduce the probability of the zirconium balls entering the centrifugal separation device of the horizontal grinding vertical separation sand mill.

[0043] Reference Figures 6 to 8 A through hole 731a is provided on the second grinding block 731, one end of the through hole 731a is connected to the first grinding area 711, and the other end of the through hole 731a is connected to the third grinding area 713. It can be understood that the set through hole 731a can be used to pass materials and grinding media and to balance fluid pressure.

[0044] In some embodiments, the through hole 731a is a variable diameter curved hole, and the distance between the opening position of the through hole 731a on the side close to the discharge port 620 and the rotation axis is smaller than the distance between the opening position of the through hole 731a on the side close to the feed port 610 and the rotation axis. It can be understood that the so-called variable diameter curved hole, that is, the length of the hole extends in the form of a curve, while the diameter of the through hole 731a shows a certain change. The aperture of the through hole 731a close to the discharge port 620 is the largest, and the aperture of the through hole 731a close to the feed port 610 is the smallest. The diameter change of the through hole 731a is gradual.

[0045] In some embodiments, the material of the first grinding block 721, the second grinding block 731 and the third grinding block 741 can all be zirconia, and the material of the rotor body 710 can be 304 stainless steel PU rubber coating. The first grinding block 721, the second grinding block 731 and the third grinding block 741 are all provided with a PU rubber coating layer, and the first grinding block 721, the second grinding block 731 and the third grinding block 741 are all fixed to the rotor body 710 by bolts. It can be understood that the first grinding block 721, the second grinding block 731 and the third grinding block 741 can also be integrally processed and formed with the rotor body 710 or assembled after being formed in parts.

[0046] It is understandable that when the sand mill is working, the material and the grinding media in the grinding cylinder 600 collide and grind, and then the mixture of the material and the grinding media is squeezed and sent into the separation cylinder 100 through the relative pressure difference in the area.

[0047] In some embodiments, the first grinding block 721 and the third grinding block 741 are both waist-shaped, and the length extension line of the first grinding block 721 and the projection of the axis of the rotor body 710 in the axial section have an angle α, 0°≤α≤45°, and the length extension line of the third grinding block 741 and the projection of the axis of the rotor body 710 in the axial section have an angle β, 0°≤β≤45°, and the front surface of the first grinding block 721 and the front surface of the third grinding block 741 are both waist-shaped arc surfaces located in the direction of rotation. It should be noted that the length extension line of the first grinding block 721 is actually the length extension line of the side plate surface of the waist-shaped block. The length extension line is a virtual line mainly used to describe the angle.

[0048] In some embodiments, the two first grinding blocks 721 axially adjacent to each other along the rotor body 710 are staggered at an angle of 0° to 45° in the circumferential direction, the two second grinding blocks 731 axially adjacent to each other along the rotor body 710 are staggered at an angle of 0° to 45° in the circumferential direction, the two third grinding blocks 741 axially adjacent to each other along the rotor body 710 are staggered at an angle of 0° to 45° in the circumferential direction, the angle between the front surface of the second grinding block 731 and the axial cross-section of the rotor body 710 is between 0° and 45°, and the angle between the front surface of the second grinding block 731 and the radial cross-section of the rotor body 710 is also between 0° and 45°. It can be understood that the two first grinding blocks 721 axially adjacent to each other along the rotor body 710 are staggered so as not to block each other in the axial direction. The axial cross-section and the radial cross-section refer to the cross-section of the axis on the cross-section plane and the cross-section perpendicular to the axis.

[0049] In some embodiments, the first grinding unit 720 includes four first grinding blocks 721 evenly distributed along the circumference of the rotor body 710, the second grinding unit 730 includes four second grinding blocks 731 evenly distributed along the circumference of the rotor body 710, and the third grinding unit 740 includes four third grinding blocks 741 evenly distributed along the circumference of the rotor body 710.

[0050] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] Of course, the present invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A centrifugal separation device for a horizontal grinding and vertical separation sand mill, characterized in that: include: A separation cylinder (100) having a spiral groove (110) provided on its inner peripheral wall, the separation cylinder (100) being used to provide a separation space, and the spiral groove (110) being used to guide the material near the cylinder wall to carry the grinding medium and flow spirally downward; a centrifugal separation wheel (200) rotatably disposed within the separation cylinder (100), the centrifugal separation wheel (200) having the same rotation direction as the spiral groove (110), a discharge cavity (240) being disposed in the middle of the centrifugal separation wheel (200), a wheel rim of the centrifugal separation wheel (200) being arranged in a wave shape, and a discharge channel (250) being disposed at the trough of the wave, the inner cavity of the separation cylinder (100) being connected to the discharge cavity (240) via the discharge channel (250), and when the centrifugal separation wheel (200) rotates, the material flows into the discharge cavity 240 through the discharge channel 250 driven by the relative pressure difference between the inner and outer sides, the centrifugal separation wheel 200 being used to separate the material from the grinding medium, and imparting a rotational tangential velocity component to the grinding medium and the material, thereby cooperating with the separation cylinder 100 to reduce the escape of the grinding medium; a mounting plate (300) connected to the lower end of the centrifugal separation wheel (200), wherein the mounting plate (300) and / or the lower end of the centrifugal separation wheel (200) are provided with protrusions (500) extending in the radial direction, wherein the protrusions (500) are evenly distributed around the circumference, and the protrusions (500) are used to block the grinding medium and differentiate the local dynamic pressure; A propulsion block (400) is connected to the lower end of the mounting plate (300). The propulsion block (400) is provided with an inclined front face (410). When the centrifugal separation wheel (200) rotates, the front face (410) can impart a downward velocity component to the material and the grinding medium, thereby increasing the relative motion velocity scalar difference between the material and the grinding medium.

2. The centrifugal separation device of the horizontal grinding and vertical separation sand mill according to claim 1, characterized in that: The centrifugal separation wheel (200) comprises: a connecting disk (210) rotatably disposed in the separation cylinder (100), the connecting disk (210) being used to connect to a hollow shaft motor (260), the hollow rotating shaft (261) of the hollow shaft motor (260) being connected to the discharge chamber (240), and the hollow shaft motor (260) being used to drive the connecting disk (210) to rotate; An impeller (220) is connected to the connecting plate (210) at one end. The impeller (220) includes a plurality of turbine-shaped distributed blades (221). The inner ends of the plurality of blades (221) are arranged around the discharge cavity (240). The outer ends of the plurality of blades (221) are distributed in a wave shape along the circumferential direction of the base circle where the turbine is located. A trough is formed between two adjacent blades (221). The gap between the two adjacent blades (221) serves as the discharge channel (250). A fixing plate (230) is connected to the other end of the impeller (220), and the protrusion (500) is provided on a peripheral wall of the fixing plate (230).

3. The centrifugal separation device of the horizontal grinding and vertical separation sand mill according to claim 2, characterized in that: The mounting plate (300) and the fixing plate (230) are spaced apart in the axial direction, and both the mounting plate (300) and the fixing plate (230) are provided with a protrusion (500) protruding in the radial direction, and the protrusion (500) of the mounting plate (300) and the protrusion (500) of the fixing plate (230) are staggered in the circumferential direction.

4. The centrifugal separation device of the horizontal grinding and vertical separation sand mill according to claim 1, characterized in that: A plurality of the spiral grooves (110) are provided, and the plurality of the spiral grooves (110) are evenly distributed along the circumference of the separation cylinder (100), and the plurality of the spiral grooves (110) have the same rotation direction.

5. The centrifugal separation device of the horizontal grinding and vertical separation sand mill according to claim 3, characterized in that: The protrusion (500) is in an arc shape, and the protrusion (500) of the mounting plate (300) and the protrusion (500) of the fixing plate (230) are staggered by 45°.

6. The centrifugal separation device of the horizontal grinding and vertical separation sand mill according to claim 1, characterized in that: Four propulsion blocks (400) are provided, and the four propulsion blocks (400) are evenly distributed around the circumference of the mounting plate (300). The angle between the front surface (410) of the propulsion block (400) and the plate surface of the mounting plate (300) is between 30° and 90°. The angle between the intersection point of the length extension line of the propulsion block (400) and the diameter of the mounting plate (300) on the base circle of the mounting plate (300) is between 0° and 60°.

7. The centrifugal separation device of the horizontal grinding and vertical separation sand mill according to claim 5, characterized in that: The width of the discharge channel (250) narrows from the inside to the outside.

8. The centrifugal separation device of the horizontal grinding and vertical separation sand mill according to claim 7, characterized in that: A fixing hole (310) is provided at the lower end of the mounting plate (300), and the fixing hole (310) is used to fix the hollow rotating shaft (261).

9. A sand mill, characterized in that: include: A grinding cylinder (600) having an axis parallel to a horizontal plane, the grinding cylinder (600) being provided with a feed port (610) and a discharge port (620), the discharge port (620) being arranged upward, and the discharge port (620) being arranged in a second quadrant region of the grinding cylinder (600) along a rotation direction; a grinding rotor (700) rotatably disposed in the grinding cylinder (600) and coaxially arranged with the grinding cylinder (600), the grinding rotor (700) being used to grind materials; The centrifugal separation device of the horizontal grinding vertical separation sand mill according to any one of claims 1 to 8, wherein the lower end of the separation cylinder (100) is connected to the discharge port (620) of the grinding cylinder (600), and the separation cylinder (100) is connected to the discharge port (620), and the centrifugal separation device of the horizontal grinding vertical separation sand mill is used to separate the material and the grinding medium.

10. The sand mill according to claim 9, characterized in that The grinding cylinder (600) is connected to the separation cylinder (100) through a reducing tube (800). The lower end of the reducing tube (800) is connected to the grinding cylinder (600) and is connected to the discharge port (620). The profile of the discharge port (620) is smaller than the profile of the lower end of the reducing tube (800). The discharge port (620) is located relatively below the profile of the lower end of the reducing tube (800). The upper end of the reducing tube (800) is connected to the lower end of the separation cylinder (100). The diameter of the reducing tube (800) gradually decreases from both ends to the middle.

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