Grinding rotor for horizontal grinding vertical separation sand mill and sand mill

Abstract

The application discloses a grinding rotor of a horizontal-grinding vertical-separation sand mill and discloses a sand mill with the grinding rotor of the horizontal-grinding vertical-separation sand mill, and the grinding rotor of the horizontal-grinding vertical-separation sand mill improves grinding efficiency and precision through three-zone synergistic effect. The rotor body is divided into first, second and third grinding zones along the axial direction, and is close to the feeding port, the middle part and the discharging port, respectively. A plurality of first grinding units are arranged in the first zone, the two end units of the first grinding units drive the medium to move in opposite directions, so that the medium is prevented from accumulating and the cover plate is prevented from being worn; the medium collision frequency is enhanced through directional flow guide in the middle unit. The second zone is provided with second grinding units which are arranged at intervals and are used as physical barriers, and the medium is given an axial velocity towards the feeding port, so that the discharging end cycle period is shortened. The third zone is provided with third grinding units which drive the medium to flow back, so that the discharging port is prevented from being blocked and local circulation grinding is formed. The three zones are designed to be different in function, and the whole realizes efficient grading grinding.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, and particularly to the grinding rotor and grinding mill of a horizontal grinding and vertical separating sand mill. Background Technology

[0002] A sand mill is a machine that grinds materials by having a grinding rotor drive the grinding media to collide and compress them.

[0003] The grinding rotor in current horizontal sand mills mainly consists of rods (grinding blocks) mounted on a rotating shaft. The shaft drives the rods to rotate, which in turn drives the grinding media (zirconium balls) to collide with the material in the grinding cylinder to achieve grinding. This type of grinding rotor has a single function, and the movement of the zirconium balls in the grinding cylinder is uncontrollable, making them prone to accumulating at the axial end of the grinding cylinder. It cannot meet the current complex and refined grinding requirements. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a grinding rotor for a horizontal grinding and vertical separating sand mill, which can improve grinding efficiency and grinding accuracy to meet complex and refined grinding needs.

[0005] The present invention also proposes a sand mill having the grinding rotor of the above-mentioned horizontal grinding vertical separation sand mill.

[0006] According to a first aspect of the present invention, a grinding rotor of a horizontal grinding and vertical separating sand mill is installed in a grinding cylinder. The grinding cylinder is provided with a feed inlet and a discharge outlet. The grinding cylinder is used to load materials and grinding media, and includes a rotor body, a first grinding unit, a second grinding unit, and a third grinding unit. The rotor body has a first grinding zone, a second grinding zone, and a third grinding zone arranged sequentially along its axial direction. The first grinding zone is located near the feed inlet of the grinding cylinder, and the third grinding zone is located near the discharge outlet of the grinding cylinder. A first grinding unit is disposed in the first grinding zone, and a plurality of the first grinding units are spaced apart along the axial direction of the rotor body. When the rotor body rotates, the first grinding units at both ends of the first grinding zone provide opposing velocity components to the grinding media, and the first grinding unit in the middle of the first grinding zone provides a velocity component towards the feed inlet or towards the discharge outlet to the grinding media. A second grinding unit is disposed in the second grinding zone, and a plurality of the second grinding units are spaced apart along the axial direction of the rotor body. The second grinding units separate the first grinding zone and the third grinding zone. When the rotor body rotates, the second grinding units provide a velocity component towards the feed inlet to the grinding media. The third grinding unit is disposed in the third grinding zone. Several third grinding units are distributed at intervals along the axial direction of the rotor body. When the rotor body rotates, the third grinding unit is used to provide a velocity component toward the feed inlet to the grinding medium.

[0007] It has at least the following beneficial effects:

[0008] When the rotor body rotates, it drives the grinding media to collide, squeeze, rub, and shear against each other to grind the material. The first grinding units at both ends of the first grinding zone provide opposing velocity components to the grinding media, effectively preventing the grinding media from accumulating in the area around the inlet and outlet, reducing the grinding dead zone, reducing the wear of the grinding media on the cover plate at the inlet or outlet of the grinding cylinder, and increasing the residence period of the grinding media in the first grinding zone, ensuring sufficient grinding and improving the grinding fineness. The first grinding unit in the middle of the first grinding zone provides the grinding media with a velocity component toward the inlet or outlet, increasing the collision frequency between the grinding media and between the grinding media and the cylinder wall, and improving the grinding efficiency. The second grinding zone separates the first grinding zone and the third grinding zone, and imparts a velocity component to the grinding medium toward the feed inlet, shortening the local circulation relative residence period of the grinding medium at the discharge outlet; the third grinding unit in the third grinding zone imparts a velocity component to the grinding medium toward the feed inlet when rotating, which can effectively prevent the grinding medium from accumulating in the area around the discharge outlet and promote the circulation of the grinding medium in the cavity, reducing the probability of the grinding medium entering the separation area. The three grinding zones have different functions, which can improve grinding efficiency and grinding fineness, and can adapt to complex and fine grinding needs.

[0009] According to some embodiments of the present invention, the first grinding unit includes a plurality of first grinding blocks distributed circumferentially along the rotor body, the first grinding blocks near the feed inlet facing the feed inlet, the first grinding blocks near the discharge outlet facing the discharge outlet, the first grinding blocks in the first grinding unit in the middle of the first grinding zone alternately facing the feed inlet and the discharge outlet, and two adjacent first grinding blocks along the axial direction of the rotor body are staggered by a predetermined angle in the circumferential direction. The second grinding unit includes a plurality of second grinding blocks distributed circumferentially along the rotor body, the second grinding blocks facing the feed inlet, and adjacent second grinding blocks along the axial direction of the rotor body are staggered by a predetermined angle in the circumferential direction. The third grinding unit includes a plurality of third grinding blocks distributed circumferentially along the rotor body, the third grinding blocks facing the discharge outlet, and adjacent third grinding blocks along the axial direction of the rotor body are staggered by a predetermined angle in the circumferential direction. The height of the second grinding block is greater than the height of the first grinding block, and the height of the first grinding block is greater than the height of the third grinding block.

[0010] According to some embodiments of the present invention, a through hole is provided on the second grinding block, one end of the through hole is connected to the first grinding area, and the other end of the through hole is connected to the third grinding area.

[0011] According to some embodiments of the present invention, the through hole is a variable diameter curved hole, and the distance between the opening position of the through hole near the discharge port and the rotating shaft is smaller than the distance between the opening position of the through hole near the feed port and the rotating shaft.

[0012] According to some embodiments of the present invention, the first grinding block, the second grinding block and the third grinding block can all be made of zirconium oxide, and the rotor body can be made of 304 stainless steel with PU coating. The first grinding block, the second grinding block and the third grinding block are all fixed to the rotor body by bolts.

[0013] According to some embodiments of the present invention, both the first grinding block and the third grinding block are waist-shaped. The projection of the length extension line of the first grinding block onto the axis of the rotor body in the axial section has an angle α, 0°≤α≤45°. The projection of the length extension line of the third grinding block onto the axis of the rotor body in the axial section has an angle β, 0°≤β≤45°. The front faces of the first grinding block and the third grinding block are both waist-shaped arc surfaces located in the rotation direction.

[0014] According to some embodiments of the present invention, the angle between two adjacent first grinding blocks along the axial direction of the rotor body and the circumferential angle between them is between 0° and 45°; the angle between two adjacent second grinding blocks along the axial direction of the rotor body and the circumferential angle between them is between 0° and 45°; the angle between two adjacent third grinding blocks along the axial direction of the rotor body and the circumferential angle between them is between 0° and 45°; the angle between the facing face of the second grinding block and the axial section of the rotor body is between 0° and 45°; and the angle between the facing face of the second grinding block and the radial section of the rotor body is also between 0° and 45°.

[0015] According to some embodiments of the present invention, the first grinding unit includes four first grinding blocks evenly distributed along the circumference of the rotor body, the second grinding unit includes four second grinding blocks evenly distributed along the circumference of the rotor body, and the third grinding unit includes four third grinding blocks evenly distributed along the circumference of the rotor body.

[0016] A sand mill according to a second aspect of the present invention includes a grinding rotor of a horizontal grinding and vertical separating sand mill according to the first aspect of the present invention, and further includes a grinding cylinder and a centrifugal separation device. The axis of the grinding cylinder is parallel to the horizontal plane. The grinding cylinder has a feed inlet and a discharge outlet. The discharge outlet is vertically upward and located in the second quadrant region of the grinding cylinder along the rotation direction. The grinding rotor of the horizontal grinding and vertical separating sand mill is rotatably disposed in the grinding cylinder and coaxially disposed with the grinding cylinder. The centrifugal separation device is connected to the discharge outlet of the grinding cylinder and is used to separate materials and grinding media.

[0017] It has at least the following beneficial effects: This sand mill has all the beneficial effects brought about by the grinding rotor of the above-mentioned horizontal grinding and vertical separation sand mill, which will not be repeated here.

[0018] According to some embodiments of the present invention, the grinding cylinder is connected to the centrifugal separation device through a variable diameter pipe. The lower end of the variable diameter pipe is connected to the grinding cylinder and communicates with the discharge port. The outline of the discharge port is smaller than the outline of the lower end of the variable diameter pipe. The discharge port is located relatively lower on the outline of the lower end of the variable diameter pipe. The upper end of the variable diameter pipe is connected to the centrifugal separation device. The diameter of the variable diameter pipe gradually decreases from both ends to the middle.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram of the structure of a sand mill according to an embodiment of the present invention;

[0022] Figure 2 This is an exploded view of a sand mill according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the centrifugal separator wheel according to an embodiment of the present invention;

[0024] Figure 4 This is a structural schematic diagram of the centrifugal separator wheel from a bottom-view angle according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of a cross-section of the centrifugal separator wheel along its axis according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the grinding rotor of the horizontal grinding and vertical separating sand mill according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the flow of grinding material in the grinding rotor of a horizontal grinding and vertical separating sand mill according to an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of the second grinding block according to an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the assembly of the grinding cylinder and the reducing pipe according to an embodiment of the present invention;

[0030] Figure 10 This is an exploded view of the assembly of the grinding cylinder and the reducing pipe according to an embodiment of the present invention;

[0031] Figure 11 This is a left view of the assembly of the grinding cylinder and the reducing pipe according to an embodiment of the present invention.

[0032] Figure label:

[0033] Separator 100, spiral groove 110;

[0034] Centrifugal separator 200, connecting disc 210, impeller 220, blade 221;

[0035] Fixed plate 230, discharge chamber 240, discharge channel 250;

[0036] Hollow shaft motor 260, hollow shaft 261;

[0037] Mounting plate 300, fixing hole 310;

[0038] Propulsion block 400, facing side 410, protrusion 500;

[0039] Grinding cylinder 600, feed inlet 610, discharge outlet 620;

[0040] Rotor body 710, first grinding zone 711, second grinding zone 712, third grinding zone 713;

[0041] First grinding unit 720, first grinding block 721;

[0042] Second grinding unit 730, second grinding block 731, through hole 731a;

[0043] Third grinding unit 740, third grinding block 741;

[0044] 800 reducing pipe. Detailed Implementation

[0045] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0046] In the description of this invention, if the terms "first" and "second" are used only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features, "several" means at least one.

[0047] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0048] Reference Figures 1 to 11 The present invention discloses a grinding rotor of a horizontal grinding and vertical separating sand mill, which is installed in a grinding cylinder 600. The grinding cylinder 600 is provided with a feed inlet 610 and a discharge outlet 620. The grinding cylinder 600 is used to load materials and grinding media. The grinding rotor of the horizontal grinding and vertical separating sand mill includes a rotor body 710, a first grinding unit 720, a second grinding unit 730 and a third grinding unit 740.

[0049] Reference Figure 6 and Figure 7The rotor body 710 has a first grinding zone 711, a second grinding zone 712, and a third grinding zone 713 arranged sequentially along its axial direction. The first grinding zone 711 is located near the feed inlet 610 of the grinding cylinder 600, and the third grinding zone 713 is located near the discharge outlet 620 of the grinding cylinder 600. A first grinding unit 720 is disposed in the first grinding zone 711. Several first grinding units 720 are arranged at intervals 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 opposing velocity components to the grinding medium, and the first grinding unit 720 in the middle of the first grinding zone 711 is used to provide a velocity component toward the feed inlet 610 or toward the discharge outlet 620 to the grinding medium. A second grinding unit 730 is disposed in the second grinding zone 712. A plurality of second grinding units 730 are arranged at staggered intervals along the axial direction of the rotor body 710. The second grinding units 730 are used to separate the first grinding zone 711 and the third grinding zone 713. When the rotor body 710 rotates, the second grinding units 730 provide a velocity component toward the feed inlet 610 to the grinding media. A third grinding unit 740 is disposed in the third grinding zone 713. A plurality of third grinding units 740 are arranged at staggered intervals along the axial direction of the rotor body 710. When the rotor body 710 rotates, the third grinding units 740 provide a velocity component toward the feed inlet 610 to the grinding media.

[0050] It should be understood that when the rotor body 710 rotates, it drives the grinding media to collide, squeeze, rub, and shear against each other to grind the material. The first grinding units 720 at both ends of the first grinding zone 711 provide opposing velocity components to the grinding media, effectively preventing the grinding media from accumulating in the area around the inlet 610 and outlet 620, reducing the grinding dead zone, reducing the wear of the grinding media on the cover plate at the inlet 610 or outlet 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 inlet 610 or toward the outlet 620, increasing the collision frequency between the grinding media and between the grinding media and the cylinder wall, and improving the grinding efficiency. The second grinding zone 712 separates the first grinding zone 711 and the third grinding zone 713, and imparts a velocity component to the grinding media toward the inlet 610, shortening the local circulation relative residence period of the grinding media at the outlet 620. The third grinding unit 740 in the third grinding zone 713 imparts a velocity component to the grinding media toward the inlet 610 during rotation, effectively preventing the grinding media from accumulating around the outlet 620 and promoting circulation within the cavity, reducing the probability of the grinding media entering the separation zone. The three grinding zones have different functions, improving grinding efficiency and fineness to meet complex and refined grinding needs.

[0051] Reference Figure 6 and Figure 7 The first grinding unit 720 includes a plurality of first grinding blocks 721 distributed circumferentially along the rotor body 710. The face of the first grinding block 721 near the feed inlet 610 faces the feed inlet 610, and the face of the first grinding block 721 near the discharge outlet 620 faces the discharge outlet 620. The faces 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 inlet 610 and the discharge outlet 620. Two adjacent first grinding blocks 721 along the axial direction of the rotor body 710 are staggered by a predetermined angle in the circumferential direction. The second grinding unit 730 includes a plurality of first grinding blocks 721 distributed circumferentially along the rotor body 710. The second grinding blocks 731 are distributed along the rotor body 710, with their faces facing the feed inlet 610. Adjacent second grinding blocks 731 along the axial direction of the rotor body 710 are staggered by a predetermined angle in the circumferential direction. The third grinding unit 740 includes several third grinding blocks 741 distributed circumferentially along the rotor body 710, with their faces facing the discharge outlet 620. Adjacent third grinding blocks 741 along the axial direction of the rotor body 710 are staggered by a predetermined angle in the circumferential direction. The height of the second grinding block 731 is greater than the height of the first grinding block 721, and the height of the first grinding block 721 is greater than the height of the third grinding block 741. The height refers to the length of the outermost radial extension of the rotor body 710.

[0052] Understandably, the "facing side" refers to the side that first contacts the material along the rotation direction. The facing sides of both the first grinding block 721 and the third grinding block 741 are curved surfaces of waist-shaped blocks. The grinding medium is zirconium balls. The first grinding block 721 at the rightmost end of the first grinding zone 711 faces the feed inlet 610, while the waist-shaped straight surface of the first grinding block 721 faces the discharge outlet 620. The waist-shaped straight surface imparts a velocity component to the zirconium balls along the axial direction toward the discharge outlet 620, effectively preventing the zirconium balls from accumulating around the feed inlet 610 and reducing their wear on the cover plate of the grinding cylinder 600 at the feed inlet 610. The first grinding block 721 at the leftmost end of the first grinding zone 711 faces the discharge outlet 620. This achieves localized cyclic grinding of the zirconium balls in the first grinding zone 711. In the middle of the first grinding zone 711, the facing sides of the first grinding blocks 721 that are adjacent in the axial and radial directions alternate, which can increase the collision frequency between the zirconium balls and the uniform dispersion of the material, thereby improving the grinding efficiency.

[0053] It should be noted that the height of the second grinding block 731 in the second grinding zone 712 is higher than that of the grinding blocks in the other grinding zones. That is, the linear velocity of the outer end of the second grinding block 731 is higher than that of other zones. The second grinding block 731 can effectively separate the first grinding zone 711 and the third grinding zone 713. Because of the facing direction of the second grinding block 731, the second grinding block 731 imparts a velocity component to the zirconium balls toward the feed inlet 610, shortening the local circulation cycle of the zirconium balls on the side of the discharge outlet 620. The cross-sectional area of ​​the second grinding block 731 is larger than that of the grinding blocks in other zones, which can effectively extend the flow trajectory of the material and improve the grinding uniformity.

[0054] Understandably, the third grinding block 741 in the third grinding zone 713 is installed at an angle to increase the velocity component it imparts to the zirconium balls toward the feed inlet 610 during rotation. This effectively prevents the zirconium balls from accumulating on the discharge port 620 side. The axially adjacent third grinding blocks 741 are installed in a staggered manner, which can improve the continuity of the velocity component of the zirconium balls toward the feed inlet 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, further reducing the probability of the zirconium balls entering the centrifugal separator.

[0055] Reference Figures 6 to 8 The second grinding block 731 has a through hole 731a. One end of the through hole 731a is connected to the first grinding zone 711, and the other end is connected to the third grinding zone 713. It can be understood that the through hole 731a can be used to pass materials and grinding media and to balance fluid pressure. The through hole 731a is a variable diameter curved hole. The distance between the opening position of the through hole 731a near the discharge port 620 and the rotating shaft is smaller than the distance between the opening position of the through hole 731a near the feed port 610 and the rotating shaft. It can be understood that the so-called variable diameter curved hole means that 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 diameter of the through hole 731a near the discharge port 620 is the largest, and the diameter of the through hole 731a near the feed port 610 is the smallest. The change in the diameter of the through hole 731a is gradual.

[0056] In some embodiments, the first grinding block 721, the second grinding block 731, and the third grinding block 741 can all be made of zirconium oxide, and the rotor body 710 can be made of 304 stainless steel with PU coating. 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 is understood that the first grinding block 721, the second grinding block 731, and the third grinding block 741 can also be welded to the rotor body 710. It is also understood that the first grinding block 721, the second grinding block 731, and the third grinding block 741 can also be integrally formed with the rotor body 710 or assembled from components.

[0057] Understandably, when the sand mill is working, the material and grinding media in the grinding cylinder 600 collide and grind, and then the mixture of material and grinding media is squeezed into the separation cylinder 100 by the relative pressure difference between the regions.

[0058] In some embodiments, both the first grinding block 721 and the third grinding block 741 are waist-shaped. The projection of the length extension line of the first grinding block 721 onto the axis of the rotor body 710 in the axial section has an angle α, 0°≤α≤45°. The projection of the length extension line of the third grinding block 741 onto the axis of the rotor body 710 in the axial section has an angle β, 0°≤β≤45°. The facing surfaces of the first grinding block 721 and the third grinding block 741 are both waist-shaped arc surfaces located in the rotation direction. 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.

[0059] In some embodiments, two adjacent first grinding blocks 721 along the axial direction of the rotor body 710 are staggered at an angle between 0° and 45° in the circumferential direction; two adjacent second grinding blocks 731 along the axial direction of the rotor body 710 are staggered at an angle between 0° and 45° in the circumferential direction; two adjacent third grinding blocks 741 along the axial direction of the rotor body 710 are staggered at an angle between 0° and 45° in the circumferential direction; the angle between the facing of the second grinding block 731 and the axial section of the rotor body 710 is between 0° and 45°; the angle between the facing of the second grinding block 731 and the radial section of the rotor body 710 is also between 0° and 45°. It can be understood that the staggered arrangement of two adjacent first grinding blocks 721 along the axial direction of the rotor body 710 means that they do not obstruct each other in the axial direction. The axial section and the radial section refer to the section on the cross-sectional plane of the axis and the section perpendicular to the axis.

[0060] In some embodiments, the first grinding unit 720 includes four first grinding blocks 721 evenly distributed around the rotor body 710, the second grinding unit 730 includes four second grinding blocks 731 evenly distributed around the rotor body 710, and the third grinding unit 740 includes four third grinding blocks 741 evenly distributed around the rotor body 710.

[0061] It should be noted that the centrifugal separation device includes a separation cylinder 100, a centrifugal separation wheel 200, a mounting plate 300, and a propulsion block 400. The inner peripheral wall of the separation cylinder 100 is provided with a spiral groove 110. The separation cylinder 100 is used to provide separation space, and the spiral groove 110 is used to guide the material near the cylinder wall to flow downward spirally with the grinding media. The centrifugal separator 200 is rotatably mounted inside the separator cylinder 100. The centrifugal separator 200 rotates in the same direction as the spiral groove 110. A discharge chamber 240 is provided in the middle of the centrifugal separator 200. The rim of the centrifugal separator 200 is wavy. A discharge channel 250 is provided at the trough of the wavy centrifugal separator 200. The inner cavity of the separator cylinder 100 is connected to the discharge chamber 240 through the discharge channel 250. When the centrifugal separator 200 rotates, the material flows into the discharge chamber 240 through the discharge channel 250 under the drive of the relative pressure difference between the inside and outside. The centrifugal separator 200 is used to separate the material from the grinding media and to impart a rotational tangential velocity component to the grinding media and the material. It works in conjunction with the separator cylinder 100 to further reduce the probability of the grinding media escaping.

[0062] Reference Figure 3 and Figure 4 The mounting plate 300 is connected to the lower end of the centrifugal separator wheel 200. The mounting plate 300 and / or the lower end of the centrifugal separator wheel 200 are provided with radially protruding protrusions 500. The protrusions 500 are evenly distributed around the circumference and serve to block the grinding media and differentiate the local dynamic pressure. The push block 400 is connected to the lower end of the mounting plate 300. The push block 400 is provided with an inclined facing surface 410. When the centrifugal separator wheel 200 rotates, the facing surface 410 can give the material and grinding media a downward velocity component to increase the magnitude of the scalar difference in relative motion velocity between the material and the grinding media.

[0063] Understandably, when the centrifugal separator wheel 200 rotates, the wavy protrusion 500 imparts a tangential velocity component to the material along the convex curve of the rotation circumference, thereby uniformly dispersing the material and throwing the grinding media tangentially onto the inner wall of the separator cylinder 100. This causes most of the grinding media to fall back into the grinding cylinder 600 under the guidance of the spiral groove 110, thus preventing the grinding media from entering the discharge chamber 240 inside the centrifugal separator wheel 200 and reducing the probability of the grinding media escaping. The spiral groove 110, in conjunction with the wavy centrifugal separator wheel 200, improves the separation efficiency between the material and the grinding media. As the centrifugal separator wheel 200 rotates, the propellant block 400, facing the material, imparts a tangential velocity component to the grinding media. The vertically downward velocity component of the material, along with the tangential velocity component of the grinding media along the rotation circumference, is simultaneously imparted by the frontal impact of the propeller block 400. Due to the significant difference in density and fineness between the material and the grinding media, the relative velocity difference between the grinding media and the material is amplified by the frontal impact of the propeller block 400. This provides the grinding media with an initial velocity condition in the same direction as gravity as it falls back into the horizontal grinding chamber, reducing the probability of the grinding media entering the discharge chamber 240 from the discharge channel 250. As the protrusion 500 rotates, the dynamic pressure of the material on its outer periphery increases. Under the action of the relative pressure difference, this effectively prevents the grinding media from entering the area where the centrifugal separator wheel 200 is located above the protrusion 500, reducing the probability of the grinding media escaping.

[0064] In addition, when the sand mill is working, the centrifugal separator wheel 200 rotates at high speed, giving the material and grinding media a tangential velocity along the rotation circumference. When the material comes into contact with 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 media spirally downward, which is conducive to the grinding media falling back into the horizontal grinding chamber of the grinding cylinder 600. When the grinding media moves upward along the wall of the separation cylinder, its trajectory path is extended by the spiral groove 110 and merges with the material flowing downward along the spiral, further increasing the difficulty for the grinding media to enter the centrifugal separation discharge zone. The so-called centrifugal separation discharge zone is the area of ​​the separation cylinder 100 where the centrifugal separator wheel 200 is located. The separation cylinder 100 and the centrifugal separator wheel 200 work together to effectively prevent the grinding media from entering the centrifugal separation discharge zone, realizing the separation of material balls, that is, avoiding ball leakage.

[0065] Reference Figures 2 to 5The centrifugal separator 200 includes a connecting plate 210, an impeller 220, and a fixing plate 230, which are coaxially arranged and connected sequentially from top to bottom. The connecting plate 210 is disposed inside the separator cylinder 100 and is used to connect 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 plate 210 to rotate. One end of the impeller 220 is connected to the connecting plate 210. The impeller 220 includes a plurality of turbine-shaped 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 wavy along the circumference of the base circle of the turbine. A trough is formed between two adjacent blades 221, and the gap between two adjacent blades 221 is the discharge channel 250. The fixed plate 230 is connected to the other end of the impeller 220. The protrusion 500 is set on the peripheral wall of the fixed plate 230. The centrifugal separator 200 has a simple structure. The impeller 220 is the main separation component of the centrifugal separator 200. Through continuous relative scouring and peeling, the material and grinding media are effectively separated in the discharge channel 250. The turbine-shaped arrangement of the blades 221 ensures that the discharge process is uniform and stable.

[0066] 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 protruding protrusions 500. 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, which 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, which 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 material on the outer peripheral side of the upper and lower disks more uniform. It works in conjunction 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 large particle size and weight, that is, the kinetic energy of the grinding media increases more.

[0067] Understandably, the side of the discharge channel 250 closest to the chamber of the separator 100 is narrower, thereby reducing the probability of the grinding media escaping.

[0068] Reference Figure 2Multiple spiral grooves 110 are provided, and the multiple spiral grooves 110 are evenly distributed along the circumference of the separation cylinder 100, and the spiral directions of the multiple spiral grooves 110 are the same. 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°.

[0069] Reference Figure 3 and Figure 4 Four push blocks 400 are provided, evenly distributed around the circumference of the mounting plate 300. The angle between the facing face 410 of the push block 400 and the surface of the mounting plate 300 is between 30° and 90°. The angle between the extension line of the push block 400 and the diameter line on the mounting plate 300 passing through the centroid of the bottom of the push 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. A fixing hole 310 for a hollow rotating shaft 261 is provided at the lower end of the mounting plate 300.

[0070] Reference Figure 6 and Figure 7 The grinding rotor of the horizontal grinding and vertical separating sand mill is installed in the grinding cylinder 600. The grinding cylinder 600 is provided with a feed inlet 610 and a discharge outlet 620. The grinding cylinder 600 is used to load materials and grinding media. The grinding rotor of the horizontal grinding and vertical separating sand mill includes a rotor body 710, a first grinding unit 720, a second grinding unit 730 and a third grinding unit 740.

[0071] A sand mill includes a grinding cylinder 600, a grinding rotor for a horizontal grinding and vertical separating sand mill, and a centrifugal separation device. The axis of the grinding cylinder 600 is parallel to the horizontal plane. The grinding cylinder 600 has a feed inlet 610 and a discharge outlet 620. The discharge outlet 620 is vertically upward and located in the second quadrant region of the grinding cylinder 600 along the rotation direction. The grinding rotor of the horizontal grinding and vertical separating sand mill is rotatably mounted in the grinding cylinder 600 and coaxially mounted with the grinding cylinder 600. The grinding rotor of the horizontal grinding and vertical separating sand mill is used to grind materials. The lower end of the centrifugal separation device, the separation cylinder 100, is connected to the discharge outlet 620 of the grinding cylinder 600. The separation cylinder 100 communicates with the discharge outlet 620. The centrifugal separation device is used to separate materials from grinding media.

[0072] Reference Figure 10 and Figure 11 The grinding cylinder 600 is connected to the separation cylinder 100 through the reducing pipe 800. The lower end of the reducing pipe 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 reducing pipe 800. The discharge port 620 is located at a relatively lower part of the outline of the lower end of the reducing pipe 800. The upper end of the reducing pipe 800 is connected to the lower end of the separation cylinder 100. The diameter of the reducing pipe 800 gradually decreases from both ends to the middle.

[0073] It is understandable that the area where the reducing pipe 800 intersects with the grinding cylinder 600 is greater than the area of ​​the discharge port 620. The distance between the centroid of the discharge port 620 and the perpendicular bisector of the grinding cylinder 600 is d. This 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 sides and the perpendicular bisector of the grinding cylinder 600. The vertical projection of the discharge port 620 is a smiley face shape formed by arcs with different radii of curvature. Because the discharge port 620 is located in the second quadrant region of the grinding cylinder 600 along the rotation direction, the zirconium balls (grinding media) tend to move downwards at an angle when they reach the position of the discharge port 620 as the rotor body 710 rotates. Therefore, the greater the distance between the position of 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 inertia, the ratio of zirconium balls entering the vertical centrifugal separator is lower. 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 zirconium balls entering the separation cylinder 100. The area where the reducing pipe 800 intersects with 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 motion between the material and the zirconium balls, it helps the zirconium balls entering the separation zone fall back into the grinding cylinder 600, reducing the probability of zirconium balls entering the separation cylinder 100. The flow velocity in the smaller diameter section of the reducer 800 is higher than that at both ends. The greater the difference in the relative velocity scalar value between the material and the grinding media, the greater the viscous force on the grinding media, and the greater the kinetic energy required to enter the vertical separator 100. In addition, the pipe at the bottom of the reducer 800 is V-shaped (narrowing from bottom to top to the middle). After the grinding media collides and rebounds with the pipe wall, its vertical upward velocity component decreases, which can effectively reduce the probability of the grinding media entering the vertical separator 100. The top pipe is inverted V-shaped (narrowing from top to bottom to the middle). Under the action of gravity and drag, it helps the grinding media fall back into the horizontally set grinding cylinder 600.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0075] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A grinding rotor for a horizontal grinding and vertical separating sand mill, characterized in that, Installed in a grinding cylinder (600), the grinding cylinder (600) is provided with a feed inlet (610) and a discharge outlet (620). The grinding cylinder (600) is used to load materials and grinding media, including: The rotor body (710) is provided with a first grinding zone (711), a second grinding zone (712) and a third grinding zone (713) in sequence along the axial direction of the rotor body (710). The first grinding zone (711) is located near the feed inlet (610) of the grinding cylinder (600), and the third grinding zone (713) is located near the discharge outlet (620) of the grinding cylinder (600). A first grinding unit (720) is disposed in the first grinding area (711). A plurality of the first grinding units (720) are 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 area (711) are used to provide opposite velocity components to the material and grinding media. The first grinding unit (720) in the middle of the first grinding area (711) is used to provide velocity components to the material and grinding media toward the feed port (610) or toward the discharge port (620). The second grinding unit (730) is disposed in the second grinding area (712). A plurality of the second grinding units (730) are staggered along the axial direction of the rotor body (710). The second grinding units (730) are used to separate the first grinding area (711) and the third grinding area (713). When the rotor body (710) rotates, the second grinding units (730) are used to provide a velocity component toward the feed inlet (610) to the material and grinding media. The third grinding unit (740) is disposed in the third grinding zone (713). Several third grinding units (740) are distributed at intervals along the axial direction of the rotor body (710). When the rotor body (710) rotates, the third grinding unit (740) is used to provide a velocity component toward the feed inlet (610) to the material and grinding media.

2. The grinding rotor of the horizontal grinding and vertical separating sand mill according to claim 1, characterized in that, The first grinding unit (720) includes a plurality of first grinding blocks (721) distributed circumferentially along the rotor body (710). The first grinding blocks (721) near the feed inlet (610) face the feed inlet (610), and the first grinding blocks (721) near the discharge outlet (620) face the discharge outlet (620). The first grinding blocks (721) in the first grinding unit (720) in the middle of the first grinding area (711) alternately face the feed inlet (610) and the discharge outlet (620). Two first grinding blocks (721) adjacent along the axial direction of the rotor body (710) are staggered by a predetermined angle in the circumferential direction. The second grinding unit (730) includes a plurality of first grinding blocks distributed circumferentially along the rotor body (710). The second grinding block (731) of the cloth faces the feed inlet (610). The second grinding blocks (731) adjacent to each other along the axial direction of the rotor body (710) are offset by a predetermined angle in the circumferential direction. The third grinding unit (740) includes a plurality of third grinding blocks (741) distributed along the circumferential direction of the rotor body (710). The third grinding blocks (741) face the discharge outlet (620). The third grinding blocks (741) adjacent to each other along the axial direction of the rotor body (710) are offset by a predetermined angle in the circumferential direction. The height of the second grinding block (731) is greater than the height of the first grinding block (721). The height of the first grinding block (721) is greater than the height of the third grinding block (741).

3. The grinding rotor of the horizontal grinding and vertical separating sand mill according to claim 2, characterized in that, The second grinding block (731) has a through hole (731a), one end of which is connected to the first grinding area (711), and the other end of which is connected to the third grinding area (713).

4. The grinding rotor of the horizontal grinding and vertical separating sand mill according to claim 3, characterized in that, The through hole (731a) is a variable diameter curved hole. The distance between the opening position of the through hole (731a) near the discharge port (620) and the rotating shaft is less than the distance between the opening position of the through hole (731a) near the feed port (610) and the rotating shaft.

5. The grinding rotor of the horizontal grinding and vertical separating sand mill according to claim 4, characterized in that, The first grinding block (721), the second grinding block (731) and the third grinding block (741) are all made of zirconium oxide. The first grinding block (721), the second grinding block (731) and the third grinding block (741) are all provided with a PU coating layer. 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.

6. The grinding rotor of the horizontal grinding and vertical separating sand mill according to claim 2, characterized in that, Both the first grinding block (721) and the third grinding block (741) are waist-shaped. The projection of the length extension line of the first grinding block (721) and the axis of the rotor body (710) in the axial section has an angle α, 0°≤α≤45°. The projection of the length extension line of the third grinding block (741) and the axis of the rotor body (710) in the axial section has an angle β, 0°≤β≤45°. The front faces of the first grinding block (721) and the front faces of the third grinding block (741) are both waist-shaped arc surfaces located in the rotation direction.

7. The grinding rotor of the horizontal grinding and vertical separating sand mill according to claim 6, characterized in that, The two first grinding blocks (721) adjacent along the axial direction of the rotor body (710) are staggered in the circumferential direction at an angle between 0° and 45°. The two second grinding blocks (731) adjacent along the axial direction of the rotor body (710) are staggered in the circumferential direction at an angle between 0° and 45°. The two third grinding blocks (741) adjacent along the axial direction of the rotor body (710) are staggered in the circumferential direction at an angle between 0° and 45°. The angle between the front face of the second grinding block (731) and the axial section of the rotor body (710) is between 0° and 45°. The angle between the front face of the second grinding block (731) and the radial section of the rotor body (710) is also between 0° and 45°.

8. The grinding rotor of the horizontal grinding and vertical separating sand mill according to any one of claims 2 to 7, characterized in that, 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).

9. A sand mill, characterized in that, include: The grinding cylinder (600) has its axis parallel to the horizontal plane. The grinding cylinder (600) has a feed inlet (610) and a discharge outlet (620). The discharge outlet (620) is set vertically upward and is located in the second quadrant region of the grinding cylinder (600) along the rotation direction. The grinding rotor of the horizontal grinding and vertical separating sand mill according to any one of claims 1 to 7, wherein the grinding rotor of the horizontal grinding and vertical separating sand mill is rotatably disposed in the grinding cylinder (600) and coaxially disposed with the grinding cylinder (600); A centrifugal separator is connected to the discharge port (620) of the grinding cylinder (600), and the centrifugal separator is used to separate materials and grinding media.

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

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