Variable flow sander

Abstract

A variable flow sand mill. The invention forms multiple forms of vortexes in the mill by scientifically combining different structures of dispersing discs. When the dispersing discs run at high speed in the mill, the guide flow slope of the first dispersing disc is downward, giving the material a vertical downward and horizontal outward component force; the guide flow slope of the second dispersing disc is upward, giving the material a vertical upward and horizontal outward component force, the first dispersing disc and the second dispersing disc constitute the driving force of the large circulation in the mill; the third dispersing disc is affected by the isolation column, so that the material inside the isolation column moves upward and towards the central axis, and the material is bounced when colliding with the shaft sleeve; the material outside the isolation column moves upward and towards the inner wall of the cylinder, and the material is bounced when colliding with the inner wall, thereby forming vortex small circulations of different sizes inside and outside, multiple vortex small circulations in the mill cooperate with the overall large circulation, greatly increasing the frequency of collisions between particles in the material, and improving the grinding efficiency.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sand mills, and particularly relates to a variable-flow sand mill. BACKGROUND

[0002] The sand mill is the most advanced and efficient grinding equipment with the widest material adaptability, the narrowest grinding cavity, the smallest gap between the stirring rods and the most concentrated grinding energy. In combination with a high-performance cooling system and an automatic control system, the sand mill can realize continuous processing and discharging of materials and greatly improve production efficiency.

[0003] In the prior art, a vertical double-diffuser-plate sand mill is disclosed in Chinese Utility Model Patent No. CN215312816U. The vertical double-diffuser-plate sand mill comprises a grinding cylinder and a middle shaft arranged in the grinding cylinder. The middle shaft is sleeved with a plurality of combined diffuser plates. Each combined diffuser plate comprises a first diffuser plate and a second diffuser plate. The first diffuser plate is provided with a plurality of first through holes. The second diffuser plate is provided with a plurality of second through holes. The lower surface of the second diffuser plate is provided with a plurality of arc-shaped blades. The arc-shaped blades are rotationally symmetrical relative to the center of the second diffuser plate. The above-mentioned application uses the combined diffuser plates to make the materials and grinding media enter the first through holes of the first diffuser plates and the second through holes of the second diffuser plates, and then the materials rapidly pass through the turbine material channel composed of the upper surface of the first diffuser plate, the lower surface of the second diffuser plate and the arc-shaped blades under the action of rotation and centrifugal force. The vertical sand mill has a single material flow direction inside the sand mill and low grinding efficiency. SUMMARY

[0004] To solve the above-mentioned problems, the application discloses a variable-flow sand mill, which solves the technical problems of the single material flow direction inside the sand mill and the low grinding efficiency.

[0005] To achieve the above-mentioned purposes, the technical scheme of the application is as follows:

[0006] A variable-flow sand mill comprises a cylinder body and a middle shaft arranged in the cylinder body. The upper part of the middle shaft is provided with at least one first diffuser plate. The first diffuser plates are arranged to form a first mounting part between two adjacent first diffuser plates. The lower part of the middle shaft is provided with at least one second diffuser plate. The second diffuser plates are arranged to form a second mounting part between two adjacent second diffuser plates. The first diffuser plate at the lowermost end and the second diffuser plate at the uppermost end form a third mounting part. Two to five third diffuser plates are arranged on the first mounting part, the second mounting part and the third mounting part, respectively.

[0007] The first diffuser plate comprises a first disc body. A plurality of first diffuser components are uniformly arranged along the circumferential direction of the edge of the first disc body. The first diffuser component has at least one first flow guide slope. When the medium collides with the first flow guide slope, the medium can be subjected to a vertical downward and horizontal outward force along the first flow guide slope.

[0008] The second dispersion disc comprises a second disc body, the second disc body is conical, a plurality of second dispersion components are arranged on the inclined surface of the cone in a circumferential direction and spaced apart from each other, and the second dispersion component has at least one second flow guide inclined surface, when the medium collides with the second flow guide inclined surface, the medium can be subjected to a vertical upward and horizontal outward force along the second flow guide inclined surface.

[0009] The third dispersion disc comprises a third disc body, a plurality of isolation columns are arranged on the third disc body, and the isolation columns are arranged on the same circumference, and under high-speed rotation, the grinding liquid forms a double-channel isolation film on both sides of the third dispersion disc.

[0010] Preferably, the inclination angle of the first flow guide inclined surface is 1°-89°.

[0011] Preferably, the cone angle of the second disc body is 30°-180°, and the inclination angle of the second flow guide inclined surface is 1°-89°.

[0012] Preferably, the isolation column penetrates through the third disc body, forms an upper isolation column on the upper side of the third disc body, and forms a lower isolation column on the lower side of the third disc body.

[0013] Preferably, the shaft sleeve is further arranged on the central shaft.

[0014] Preferably, the top of the cylinder body is provided with a discharge bin, the discharge bin is provided with a raw material discharge port, and the raw material discharge port is provided with a filter screen.

[0015] Preferably, the cylinder body is provided with a grinding medium feeding port.

[0016] Preferably, the outer part of the cylinder body is provided with a cooling device, the lower end of the cooling device is provided with a cooling medium feeding port, and the upper end of the cooling device is provided with a cooling medium discharge port.

[0017] Preferably, the lower end of the cylinder body is further provided with a raw material feeding port.

[0018] Preferably, the upper end of the cylinder body is further provided with a cover plate, and the cover plate is provided with a plurality of mounting holes.

[0019] The technical scheme adopted by the present application can achieve the following beneficial effects:

[0020] The present application forms multiple vortexes by scientifically combining different structures of dispersing discs, changing the internal material flow direction by multi-angle stress. When the dispersing disc runs at high speed in the grinding machine, the first guide flow slope of the first dispersing disc is downward, giving the material a vertical downward and horizontal outward component force; the second guide flow slope of the second dispersing disc is upward, giving the material a vertical upward and horizontal outward component force, the first dispersing disc and the second dispersing disc constitute the driving force of the large circulation in the sand mill; the third dispersing disc is affected by the isolation column, so that the material inside the isolation column moves upward and towards the central axis, and the material is bounced when colliding with the shaft sleeve; the material outside the isolation column moves upward and towards the inner wall of the cylinder, and the material is bounced when colliding with the inner wall, thereby forming vortexes with different sizes. Because the forces of different dispersing discs are different, the multiple vortexes in the sand mill are closely matched with the overall large circulation, greatly increasing the frequency of collisions between particles in the material, and the circulation speed is fast, achieving high-efficiency grinding effect, thereby improving the grinding efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the sand mill.

[0022] Figure 2 It is a schematic diagram of the front view structure of the sand mill.

[0023] Figure 3 It is a schematic diagram of the cross-sectional structure of the sand mill.

[0024] Figure 4 It is a schematic diagram of the first dispersing disc structure of the sand mill.

[0025] Figure 5 It is a schematic diagram of the second dispersing disc structure of the sand mill.

[0026] Figure 6 It is a schematic diagram of the third dispersing disc structure of the sand mill.

[0027] In the figure: cylinder 100, central shaft 200, first dispersing disc 301, second dispersing disc 302, third dispersing disc 303, shaft sleeve 400, cooling device 500, cooling medium inlet 501, cooling medium outlet 502, raw material bin 600, raw material outlet 601, raw material inlet 602, filter screen 603, grinding medium inlet 700, cover plate 801, mounting hole 802. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0029] It should be noted that when a device is referred to as being "connected" to another, it can be directly connected to the other device or an intervening device can be present. The terms "interior", "top", "upper", "bottom", "lower", "up", "down", and similar expressions are used herein for purposes of explanation only and are not intended to be limiting.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting. As used in this description, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0031] The application will be further described with reference to the drawings and examples.

[0032] A variable flow sand mill comprises a barrel 100 and a central shaft 200 arranged in the barrel 100, at least one first dispersion disc 301 is arranged on the upper part of the central shaft 200, and a first mounting part is formed between two adjacent first dispersion discs 301; at least one second dispersion disc 302 is arranged on the lower part of the central shaft 200, and a second mounting part is formed between two adjacent second dispersion discs 302; a third mounting part is formed between the first dispersion disc 301 at the lowermost end and the second dispersion disc 302 at the uppermost end; 2-5 third dispersion discs 303 are arranged on the first mounting part, the second mounting part and the third mounting part respectively; the first dispersion disc 301 comprises a first disc body, a plurality of first dispersion components are uniformly arranged along the circumferential direction of the edge of the first disc body, the first dispersion component has at least one first flow guide slope, and when the medium collides with the first flow guide slope, the medium can receive a component force vertically downward and horizontally outward along the first flow guide slope; the second dispersion disc 302 comprises a second disc body, the second disc body is conical, a plurality of second dispersion components are arranged on the slope of the conical shape in a circumferential direction at intervals, the second dispersion component has at least one second flow guide slope, and when the medium collides with the second flow guide slope, the medium can receive a component force vertically upward and horizontally outward along the second flow guide slope; the third dispersion disc 303 comprises a third disc body, a plurality of isolation columns are arranged on the third disc body, the isolation columns are arranged on the same circumference, and under high-speed rotation, the grinding liquid forms a double-channel isolation film on both sides of the third dispersion disc 303.

[0033] In one case, for example, a first dispersion disc 301 is installed at the uppermost end of the central shaft 200, a second dispersion disc 302 is installed at the lowermost end of the central shaft 200, and a plurality of third dispersion discs 303 are installed between the first dispersion disc 301 and the second dispersion disc 302. It is worth emphasizing that in this case, since there is only one first dispersion disc 301 and one second dispersion disc 302 in the barrel 100, there is no first mounting portion and no second mounting portion.

[0034] In another case, when the central shaft 200 is relatively long, in order to further increase the turbulent flow speed, a first dispersion disc 301 is installed at the uppermost end and the middle of the central shaft 200, and a second dispersion disc 302 is installed at the lowermost end of the central shaft 200. In this case, the first dispersion discs 301 installed at the uppermost end and the middle of the central shaft 200 form a first mounting portion, and the first dispersion disc 301 installed at the middle of the central shaft 200 and the second dispersion disc 302 installed at the lowermost end form a third mounting portion. Since there is only one second dispersion disc 302, there is no second mounting portion. A plurality of third dispersion discs 303 are installed between the first mounting portion and the third mounting portion, respectively.

[0035] In yet another case, in order to further improve the grinding effect of the material, a first dispersion disc 301 is installed at the uppermost end of the central shaft 200, a first dispersion disc 301 is installed at one quarter of the central shaft 200, a second dispersion disc 302 is installed at three quarters of the central shaft 200, and a second dispersion disc 302 is installed at the bottom of the central shaft 200. The first dispersion discs 301 installed at the uppermost end and the one quarter of the central shaft 200 form a first mounting portion, the second dispersion discs 302 installed at the three quarters and the bottom of the central shaft 200 form a second mounting portion, and the first dispersion disc 301 installed at the one quarter of the central shaft 200 and the second dispersion disc 302 installed at the three quarters form a third mounting portion. A plurality of third dispersion discs 303 are installed on the first mounting portion, the second mounting portion, and the third mounting portion, respectively.

[0036] The first dispersion disc 301 comprises a first disc body, a plurality of first dispersion components are uniformly arranged along the circumferential direction of the edge of the first disc body, and the dispersion components have at least one first flow guide slope. When the medium collides with the first flow guide slope, the medium can be subjected to a vertical downward and horizontal outward force along the first flow guide slope. The inclination angle of the first flow guide slope is 1°-89°, and preferably the inclination angle of the flow guide slope is 30°-60°.

[0037] As preferred, the first dispersion disc 301 is made of a circular cake, i.e. a first disc body, which is uniformly cut along the outer edge of the first disc body at equal intervals, so that the outer edge of the first disc body forms a plurality of equidistant sawteeth, which are rectangular or square, and the sawteeth are the first dispersion components of the present application, and the number of the dispersion components is 2-12. A cutting machine is used to cut off one corner of the rectangular or square outwardly, so that each of the dispersion components has a first flow guide slope.

[0038] When the flow guide slope is cut by the cutting machine, it is preferred to cut downward along the diagonal of the rectangular or square of the first dispersion component, and the cut flow guide slope is a quadrilateral, wherein two non-adjacent sides of the quadrilateral are parallel lines, and the quadrilateral as a whole is a slanting trapezoidal shape.

[0039] The first dispersion disc 301 can be installed at the upper part or the middle part of the sand mill during use, and the first flow guide slope is downward.

[0040] The second dispersion disc 302 comprises a second disc body, which is conical, and a plurality of second dispersion components are arranged on the conical slope of the second disc body at intervals along the vertex in the circumferential direction. The second dispersion disc 302 is mainly used at the bottom of the sand mill to prevent the material from depositing on the wheel body. Therefore, the second disc body of the second dispersion disc 302 is conical, and the cone angle of the conical shape is 30°-180°, which is determined by different materials. Different materials have different cone angles. A plurality of second dispersion components are arranged on the conical slope of the second disc body at intervals along the vertex in the circumferential direction, and the spacing between the dispersion components forms a flow guide groove, which can prevent the slurry from depositing on the dispersion disc. The dispersion components can be uniformly or non-uniformly distributed on the second dispersion disc 302. The present application preferably uniformly distributes the dispersion components on the second disc body, and the number of the dispersion components is 2-12.

[0041] The second dispersion component is an irregular polyhedron, wherein one face is combined with the conical face of the second disc body, one side of the second dispersion component is a plane, and the other side is a slope or a slope plus a straight face. The second dispersion component has at least one second flow guide slope, and the inclination angle of the second flow guide slope is 1°-89°, and preferably the inclination angle of the flow guide slope is 30°-60°.

[0042] As preferred, when the second dispersion component of the second dispersion disc 302 is a right-angled trapezoid, the right-angled trapezoid is equivalent to being inverted and buckled on the second disc body, the slope of the trapezoid is combined with the slope of the second disc body in correspondence, and a slope is cut on the face with four right angles as a second flow guide slope.

[0043] When the second dispersion disc 302 is viewed from the top, the dispersion components are arranged along the circumferential direction of the center of the second disc body, and the dispersion components are in a triangular shape, with one angle of the triangle converging to the center, and a quadrilateral inclined surface beside the triangle; when the dispersion disc is viewed from the bottom, the second disc body is in a conical shape, and the upper surfaces of the dispersion components are on the same horizontal line.

[0044] The second dispersion disc 302 is generally installed at the bottom of the grinding machine, and the inclined surface of the second flow guide inclined surface is installed upward, which can be used in cooperation with other dispersion discs. When the material in the grinding machine circulates to the bottom, under the condition that the flow guide dispersion disc is rotating at a high speed, when the medium collides with the second flow guide inclined surface, the medium can be subjected to a vertical upward and horizontal outward force along the second flow guide inclined surface, providing a lifting force for the material, making the rotating flow upward, and can bring the material upward without remaining at the bottom of the sand mill, and there is no deposition of material on the flow guide dispersion disc when the sand mill is not working.

[0045] The third dispersion disc 303 comprises a third disc body, and a plurality of isolation columns are arranged on the third disc body, and the plurality of isolation columns are arranged on the same circumference. Under high-speed rotation, the isolation columns form a double-channel isolation membrane with one large and one small, one inside and one outside, which can prevent the internal and external media from interacting at will, form an internal and external turbulent flow interval, so that the turbulent flow is orderly and controllable, and the purpose of isolation and order is achieved. The isolation column penetrates the third disc body, and forms an upper isolation column above the third disc body and a lower isolation column below the third disc body.

[0046] As a preferred, the process of the third dispersion disc 303 is as follows: a plurality of isolation columns are prepared, the isolation columns are cylindrical, and the sizes of the isolation columns are equal. The two ends of the isolation columns are polished into round corners. A round cake, i.e., a third disc body, is prepared, the installation positions of the isolation columns are positioned along the same circumferential trajectory of the third disc body, each position is labeled, the distances between each position are equal, and isolation holes are punched at the labeled positions, the size of the isolation holes is just suitable for the isolation columns to pass through. The prepared isolation columns are installed on the third disc body through the isolation holes, and the upper part of the third disc body is an upper isolation column, and the lower part of the third disc body is a lower isolation column.

[0047] The height of the isolation column is 0.5-1 times the thickness of the third disc body, and the diameter of the isolation column is 5%-20% of the diameter of the third disc body. For example, when the diameter of the third disc body is 40 cm and the thickness is 5 cm, the height of the isolation column is preferably 4 cm, and the diameter is 2.5 cm, which is the best.

[0048] The isolation columns are 2-12, preferably the isolation columns are 4-8, and the two ends of the isolation columns are polished into round corners, which can improve the wear resistance of the isolation columns, reduce the loss of the third dispersion disc 303, and preferably the isolation columns are 0-2 mm round corners.

[0049] As a preferred, the third dispersion disc 303 is installed in the interior of the sand mill when in use. When the third dispersion disc 303 is running at high speed, the grinding liquid forms two channels of inside and outside and large and small on both sides of the third dispersion disc 303, so that the medium slurry cannot flow randomly, but only circulates with the turbulent flow in the sand mill. Therefore, the turbulent flow is orderly and controllable, achieving the purpose of isolation and control.

[0050] The shaft hole is provided with a key groove hole, and the shaft hole is any one of a polygon, a circle, a square, and a triangle. When the shaft hole is a polygon, a square, or a triangle, the key groove hole can be omitted. When the shaft hole is a circle, at least one key groove hole is provided, and preferably three key groove holes are provided. The medium through holes can be uniformly distributed or not, and there can be one or more medium through holes. The medium through holes are any one of a circle, a square, a sector, a polygon, an ellipse, and a round square. The medium through holes are provided to enable the medium to flow fully in the sand mill, and in combination with the rotation of the dispersion disc, the material grinding is more uniform, and the grinding efficiency is improved.

[0051] According to a specific embodiment, the variable-flow sand mill further comprises a shaft sleeve 400, which can be sleeved on the central shaft 200 and located between two adjacent dispersion discs, so as to maintain a certain distance between the dispersion discs, and the size of the distance is determined by the size of the shaft sleeve 400. At the same time, the central shaft 200 can be protected, and the impact of the material on the central shaft 200 is reduced.

[0052] According to specific embodiments, the upper part of the barrel 100 is provided with a raw material discharge port 601 and a grinding medium feeding port 700, and the lower part of the barrel 100 is provided with a raw material feeding port 602. The raw material feeding port is arranged at the lower end of the barrel 100, so that the material slowly enters from the bottom. If the feeding port is arranged above the barrel 100, the material will be affected by gravity when entering the barrel 100, which will impact the central shaft 200 or the dispersion disc in the barrel 100. Long-term impact will damage the central shaft 200 or the dispersion disc, or the dispersion disc will be skewed after being impacted, which will disturb the vortex in the barrel 100, thereby breaking the circulation system in the barrel 100 and causing the grinding quality to decrease. The ground slurry will flow out of the raw material discharge port 601 above the barrel 100 according to the circulation system, and the raw material discharge port 601 is further provided with a filter screen 603 to further ensure the quality of the material. The grinding medium feeding port 700 is arranged above the barrel 100, so that the feeding will not affect the central shaft 200 or the dispersion disc. Firstly, the amount of grinding medium added is less than the amount of raw material, and the grinding medium is added in small amounts and multiple times. Secondly, the raw material is added first, and the grinding medium is added after a period of operation, so the grinding medium feeding port can be placed above the barrel 100.

[0053] According to specific embodiments, the barrel 100 is externally provided with a cooling device 500, and the cooling device 500 is provided with a cooling medium feeding port 501 and a cooling medium discharge port 502. Since the slurry in the barrel 100 rotates at high speed, a certain amount of heat will be generated. In order to ensure the normal temperature in the barrel, the barrel 100 is externally provided with a cooling device 500, and the cooling device 500 is provided with a cooling medium feeding port 501 and a cooling medium discharge port 502, so that the cooling medium continuously circulates, thereby ensuring the normal temperature of the barrel 100.

[0054] According to specific embodiments, the upper end of the barrel 100 is further provided with a cover plate 801, and the cover plate 801 is provided with a plurality of mounting holes 802. The cover plate 801 can prevent the material from splashing out, and can also facilitate observation and maintenance.

[0055] In a specific embodiment, for example in grinding silicon carbide, the prepared silicon carbide raw material is slowly fed into the barrel 100 from the raw material inlet 602 by using a pneumatic diaphragm pump, and after the slurry is fully stirred, a small amount of silicon carbide grinding medium is poured into the barrel 100 through the grinding medium inlet 700 for several times, and the sand mill continues to operate to fully grind the raw material in the sand mill. The uppermost end of the middle shaft 200 is provided with a first dispersion disc 301, and a shaft sleeve 400 is further sleeved between each dispersion disc to ensure the distance between each dispersion disc. When the sand mill operates at high speed, the first dispersion disc 301 arranged at the uppermost end is provided with a first flow guide slope, and the first flow guide slope is arranged downward. The first flow guide slope can give the material a vertical downward and horizontal outward component force, so that the material as a whole moves downward. The second dispersion disc 302 arranged at the lowermost end of the middle shaft 200 is provided with a second flow guide slope, and the second flow guide slope is arranged upward. The second flow guide slope can give the material a vertical upward and horizontal outward component force, so that the material as a whole moves upward. The material moving downward under the action of the first dispersion disc 301 collides with the material moving upward under the action of the second dispersion disc 302, forming a vortex to promote the large circulation in the grinding machine. Meanwhile, the third dispersion disc 303 is further arranged between the first dispersion disc 301 and the second dispersion disc 302. The material inside the isolation column moves upward and in the direction of the middle shaft 200 under the influence of the isolation column arranged on the third dispersion disc 303, and the material is bounced when colliding with the shaft sleeve 400. The material outside the isolation column moves upward and in the direction of the inner wall of the barrel 100, and the material is bounced when colliding with the inner wall, thereby forming vortexes with different sizes in the inside and outside. The large silicon carbide particles in the circulation are thrown out by centrifugal force and continue to be ground in the large circulation or the small circulation, while the small silicon carbide particles overflow the barrel 100 through the gap between the middle shaft 200 and the cover plate 801 and flow out through the raw material outlet 601. The silicon carbide that does not meet the process standard continues to circulate in the grinding machine. Under the close cooperation of the small circulation and the large circulation, multiple violent vortexes are formed in the grinding machine, greatly increasing the collision probability of the medium and the raw material and the raw material, so that the material is ground more fully and quickly.

[0056] It should be noted that the installation positions of the first dispersion disc 301 and the second dispersion disc 302 can be freely combined according to the type of the grinding machine, the grinding material and the work requirement, and are not limited to the above installation methods.

[0057] The above-described embodiments only express the device arrangement method of the present application, which is described in detail, but cannot be understood as a limitation on the patent application scope; it should be noted that for ordinary skilled persons in the art, some adjustments and improvements can be made without departing from the concept of the present application, which belongs to the protection scope of the present application; therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A variable flow sander characterized by, The application relates to a dispersing device, which comprises a cylinder body and a middle shaft arranged in the cylinder body, wherein the upper part of the middle shaft is provided with at least one first dispersing disc, and the first installation part is formed between two adjacent first dispersing discs; the lower part of the middle shaft is provided with at least one second dispersing disc, and the second installation part is formed between two adjacent second dispersing discs; the third installation part is formed between the first dispersing disc at the lowermost end and the second dispersing disc at the uppermost end; and 2-5 third dispersing discs are arranged on the first installation part, the second installation part and the third installation part respectively. The first dispersing disc comprises a first disc body, a plurality of first dispersing components are uniformly arranged along the circumferential direction of the edge of the first disc body, the first dispersing component is provided with at least one first flow guide inclined surface, and when the medium collides with the first flow guide inclined surface, the medium can be subjected to the component force along the first flow guide inclined surface vertically downward and horizontally outward. The second dispersing disc comprises a second disc body, the second disc body is conical, a plurality of second dispersing components are arranged on the inclined surface of the cone and spaced along the circumferential direction of the vertex, and the second dispersing component is provided with at least one second flow guide inclined surface; when the medium collides with the second flow guide inclined surface, the medium can be subjected to the component force along the second flow guide inclined surface vertically upward and horizontally outward. The third dispersing disc comprises a third disc body, a plurality of isolation columns are arranged on the third disc body, the isolation columns are arranged on the same circle, and the isolation columns form a double-channel isolation film on both sides of the third dispersing disc under high-speed rotation.

2. A variable flow sander as claimed in claim 1, characterised in that, The inclination angle of the first flow guide inclined surface is 1-89 degrees.

3. The variable flow sander of claim 1, wherein, The cone angle of the second disc body is 30-180 degrees, and the inclination angle of the second flow guide inclined surface is 1-89 degrees.

4. The variable flow sander of claim 1, wherein, The isolation columns penetrate through the third disc body, form upper isolation columns on the upper side of the third disc body and form lower isolation columns on the lower side of the third disc body.

5. The variable flow sander of claim 1, wherein, A shaft sleeve is further arranged on the middle shaft.

6. The variable flow sander of claim 1, wherein, A discharge bin is arranged on the top of the cylinder body, a raw material discharge port is arranged on the discharge bin, and a filter screen is arranged in the raw material discharge port.

7. The variable flow sander of claim 1, wherein, A grinding medium feeding port is arranged on the cylinder body.

8. The variable flow sander of claim 1, wherein, A cooling device is arranged outside the cylinder body, a cooling medium feeding port is arranged at the lower end of the cooling device, and a cooling medium discharge port is arranged at the upper end of the cooling device.

9. The variable flow sander of claim 1, wherein, A raw material feeding port is further arranged at the lower end of the cylinder body.

10. The variable flow sander of claim 1, wherein, A cover plate is further arranged at the upper end of the cylinder body, and a plurality of mounting holes are arranged on the cover plate.

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