Molding sand mill with uniform particle size

Abstract

The invention discloses a uniform-granularity sand mill, and relates to the technical field of material grinding. The uniform-particle-size sand mill comprises a driving mechanism, a grinding rotor, a sand milling bin, a filter cartridge and a pushing mechanism. The filter cartridge is connected into the sanding bins, a discharging cavity is formed between the sanding bins, the driving mechanism is in transmission connection with the grinding rotor, the grinding rotor extends into the filter cartridge, and the driving mechanism is used for driving a grinding medium and a material to move in the filter cartridge through the grinding rotor so as to grind the material into material particles; and the filtering cylinder is used for allowing material particles reaching the preset particle size to penetrate through, a discharging opening is formed in the sanding bin, and the pushing mechanism is installed in the discharging cavity and used for pushing the material particles in the discharging cavity out of the discharging opening. The uniform-granularity sand mill provided by the invention can realize filtering and discharging of material particles under the condition of ensuring the grinding efficiency, so that the granularity distribution of the material particles is highly concentrated, the granularity uniformity is improved, and the user requirements are met.

Description

Technical Field

[0001] The invention relates to the technical field of material grinding, in particular to a sand mill with uniform particle size. Background Art

[0002] As a grinding equipment developed from ball mill, sand mill has finer grinding particle size and better grinding quality. It can disperse, crush, grind, homogenize and depolymerize the materials flowing through the cavity through the shear force and collision force between the grinding media (zirconium beads or glass beads) in the cavity, making it one of the grinding equipment with the widest range of applicable material particle sizes, the most advanced and the highest grinding efficiency. After grinding, the current sand mill discharges the material through the outlet at the end of the casing. As a result, the product particle size varies and the uniformity is poor, which is difficult to meet the needs of some users.

[0003] In view of this, it is particularly important to design and manufacture a sand mill with highly concentrated particle size distribution and uniform particle size, especially in grinding production. Summary of the invention

[0004] The object of the present invention is to provide a sand mill with uniform particle size, which can filter and discharge material particles while ensuring grinding efficiency, so that the particle size distribution of the material particles is highly concentrated, the particle size uniformity is improved, and user needs are met.

[0005] The present invention is achieved by adopting the following technical solutions.

[0006] A uniform-size sand mill comprises a driving mechanism, a grinding rotor, a sand mill bin, a filter cartridge and a pushing mechanism. The filter cartridge is connected to the sand mill bin, and a discharge cavity is formed between the sand mill bins. The driving mechanism is transmission-connected to the grinding rotor, and the grinding rotor extends into the filter cartridge. The driving mechanism is used to drive the grinding medium and the material to move in the filter cartridge through the grinding rotor so as to grind the material into material particles. The filter cartridge is used to allow material particles reaching a preset particle size to pass through. The sand mill bin is provided with a discharge port connected to the discharge cavity. The pushing mechanism is installed in the discharge cavity. The pushing mechanism is used to push the material particles in the discharge cavity out of the discharge port.

[0007] Optionally, the sanding chamber includes a first end wall, an annular cylinder wall and a second end wall, the first end wall and the second end wall are relatively arranged at the two ends of the annular cylinder wall and are both connected to the annular cylinder wall, the annular cylinder wall is coaxially arranged with the filter cylinder, the filter cylinder is sealed and connected between the first end wall and the second end wall, the discharge cavity is annular and is arranged between the annular cylinder wall and the filter cylinder, and the discharge port is opened in the annular cylinder wall or the first end wall.

[0008] Optionally, the second end wall is provided with a feed inlet, which is connected to the filter cartridge.

[0009] Optionally, the grinding rotor includes a connecting shaft and a stirring shaft, the driving mechanism is transmission-connected to the connecting shaft, the connecting shaft extends into the filter cartridge and is rotationally connected to the sand grinding chamber, the connecting shaft is coaxially arranged with the filter cartridge, the stirring shaft is connected to the connecting shaft and extends radially along the connecting shaft.

[0010] Optionally, there are multiple stirring shafts, which are divided into multiple groups. The multiple groups of stirring shafts are arranged in parallel and at intervals along the axial direction of the connecting shaft, and the multiple stirring shafts in each group are arranged in a circular array on the circumference of the connecting shaft.

[0011] Optionally, the driving mechanism includes a first driving member, which is connected to the grinding rotor; or, the driving mechanism includes a first driving member and a belt transmission assembly, which is connected to the grinding rotor via the belt transmission assembly; or, the driving mechanism includes a first driving member and a gear transmission assembly, which is connected to the grinding rotor via the gear transmission assembly; or, the driving mechanism includes a first driving member and a chain transmission assembly, which is connected to the grinding rotor via the chain transmission assembly.

[0012] Optionally, the filter cartridge is detachably connected to the sand milling chamber, and a preset particle size of particles of the material filtered by the filter cartridge is a nanometer-level particle size, a micrometer-level particle size, or a millimeter-level particle size.

[0013] Optionally, the filter cartridge is made of a ceramic filter material densely covered with a plurality of micropores, a fiber filter material, a paper filter material or an activated carbon filter material.

[0014] Optionally, the pushing mechanism includes a second driving member and a pushing member, the second driving member is connected to the pushing member, and the pushing member is movably disposed in the discharge cavity.

[0015] Optionally, the pusher is annular or spiral.

[0016] The uniform particle size sand mill provided by the present invention has the following beneficial effects:

[0017] The sand mill with uniform particle size provided by the present invention has a filter cylinder connected to the sand mill bin, and a discharge cavity is formed between the sand mill bins. The driving mechanism is connected to the grinding rotor in a transmission manner, and the grinding rotor extends into the filter cylinder. The driving mechanism is used to drive the grinding medium and the material to move in the filter cylinder through the grinding rotor to grind the material into material particles. The filter cylinder is used for allowing material particles reaching a preset particle size to pass through. The sand mill bin is provided with a discharge port, and a pushing mechanism is installed in the discharge cavity. The pushing mechanism is used to push the material particles in the discharge cavity out of the discharge port. Compared with the prior art, the sand mill with uniform particle size provided by the present invention adopts a filter cylinder connected to the sand mill bin and a pushing mechanism installed in the discharge cavity. Therefore, it can achieve filtering and discharging of material particles while ensuring grinding efficiency, so that the particle size distribution of the material particles is highly concentrated, the particle size uniformity is improved, and user needs are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic structural diagram of a uniform-size sand mill provided in an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of a sand mill chamber in a sand mill with uniform particle size provided by an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the structure of the connection between the driving mechanism and the grinding rotor in the uniform particle size sand mill provided by an embodiment of the present invention;

[0022] Figure 4 A cross-sectional view of a uniform-size sand mill provided by an embodiment of the present invention;

[0023] Figure 5 This is a schematic structural diagram of a material pushing mechanism in a uniform-grained sand mill provided in an embodiment of the present invention.

[0024] Icons: 100-uniform-size sand mill; 110-driving mechanism; 111-first driving member; 112-first pulley; 113-transmission belt; 114-second pulley; 120-grinding rotor; 121-connecting shaft; 122-agitation shaft; 130-sand milling chamber; 131-discharging port; 132-first end wall; 133-annular cylinder wall; 134-second end wall; 135-feeding port; 140-filter cylinder; 150-pushing mechanism; 151-second driving member; 152-pushing member; 160-discharging cavity. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0031] Please refer to Figure 1 The embodiment of the present invention provides a uniform particle size sand mill 100 for grinding materials. It can filter and discharge material particles while ensuring grinding efficiency, so that the particle size distribution of material particles is highly concentrated, the particle size uniformity is improved, and user needs are met.

[0032] The uniform particle size sand mill 100 includes a driving mechanism 110, a grinding rotor 120, a sand milling chamber 130, a filter cartridge 140 and a pushing mechanism 150. The filter cartridge 140 is connected to the sand milling chamber 130, and a discharge cavity 160 is formed between the sand milling chambers 130. The sand milling chamber 130 is used to limit and fix the filter cartridge 140 to prevent the filter cartridge 140 from moving relative to the sand milling chamber 130. The driving mechanism 110 is connected to the grinding rotor 120 in a transmission manner, and the grinding rotor 120 extends into the filter cartridge 140. The driving mechanism 110 is used to drive the grinding media and the material to move in the filter cartridge 140 through the grinding rotor 120. In this process, the material is ground by the shear force and collision force between the grinding media to grind the material into material particles. The filter cartridge 140 is used to allow material particles that have reached a preset particle size to pass through, so that the material particles that have reached the preset particle size enter the discharge cavity 160, and the material particles that have not reached the preset particle size are retained in the filter cartridge 140 to continue to be ground, thereby realizing the filtering function of the material particles. Furthermore, the sand mill bin 130 is provided with a discharge port 131 connected to the discharge cavity 160, and the pushing mechanism 150 is installed in the discharge cavity 160. The pushing mechanism 150 is used to push the material particles in the discharge cavity 160 out of the discharge port 131 to realize the discharge function of the material particles. In this way, the uniform particle size sand mill 100 can filter and discharge the material particles while ensuring the grinding efficiency, so that the particle size distribution of the material particles is highly concentrated, the particle size uniformity is improved, and the user needs are met.

[0033] It should be noted that, in the process of grinding the material by the grinding rotor 120 through the grinding medium, the particle sizes of the material particles are different, and the particle size of the material particles will decrease as the grinding time increases. When the particle size of the material particles is equal to or less than the preset particle size, the particle size of the material particles reaches the preset particle size, and the material particles will pass through the filter cartridge 140 under the action of centrifugal force and enter the discharge cavity 160 (generally, when the particle size of the material particles is equal to the preset particle size, it will pass through the filter cartridge 140, and will not wait until it is less than the preset particle size); when the particle size of the material particles is greater than the preset particle size, the particle size of the material particles does not reach the preset particle size, and the material particles continue to be ground in the filter cartridge 140 driven by the grinding rotor 120 until the particle size reaches the preset particle size. Furthermore, during the material grinding process, the fluid formed by the material that has not passed through the filter cartridge 140 and the grinding medium moves at a high speed in the filter cartridge 140 and forms turbulence, which continuously washes the inner surface of the filter cartridge 140 and takes away a small amount of material particles attached to the inner surface of the filter cartridge 140 and whose particle size is larger than the preset particle size, so as to prevent the filter cartridge 140 from being blocked and ensure the stability of the filtering function.

[0034] Furthermore, the filter cartridge 140 is detachably connected to the sand milling chamber 130 so as to be replaced according to user needs. The preset particle size of the material particles filtered by the filter cartridge 140 is nanometer-level particle size, micrometer-level particle size or millimeter-level particle size. According to user needs, the filter cartridges 140 with different preset particle sizes can be installed in the sand milling chamber 130 to achieve the filtration of material particles with different preset particle sizes, which is convenient and practical.

[0035] In this embodiment, the grinding medium is ultrafine zirconium beads, and the preset particle size for filtering out material particles is nanometer-level particle size, but it is not limited to this. In other embodiments, the grinding medium can also be ultrafine glass beads, and the preset particle size can also be micrometer-level particle size. There is no specific limitation on the material, size and preset particle size of the grinding medium.

[0036] Please refer to Figure 2 The sanding chamber 130 includes a first end wall 132, an annular cylinder wall 133 and a second end wall 134. The first end wall 132 and the second end wall 134 are arranged at opposite ends of the annular cylinder wall 133 and are both connected to the annular cylinder wall 133. In this embodiment, the first end wall 132, the annular cylinder wall 133 and the second end wall 134 are integrally formed to improve the connection strength. Specifically, the annular cylinder wall 133 is sleeved outside the filter cylinder 140 and is spaced apart from the filter cylinder 140. The annular cylinder wall 133 and the filter cylinder 140 are coaxially arranged. The filter cylinder 140 is sealed and connected between the first end wall 132 and the second end wall 134, that is, there is no gap between the filter cylinder 140 and the first end wall 132 and the second end wall 134 to prevent material particles from directly leaking into the discharge cavity 160 without passing through the filter cylinder 140. The discharge cavity 160 is annular and is disposed between the annular cylinder wall 133 and the filter cylinder 140 . Material particles reaching a preset particle size will pass through the filter cylinder 140 and enter the discharge cavity 160 under the action of centrifugal force.

[0037] In this embodiment, the discharge port 131 is provided on the annular cylinder wall 133 and is disposed at one end of the annular cylinder wall 133 close to the first end wall 132, so that the material in the discharge cavity 160 can flow out from the discharge port 131 under the action of the pushing mechanism 150, thereby realizing a reliable discharge function. However, this is not limited to this, and in other embodiments, the discharge port 131 can also be provided on the first end wall 132, and the location of the discharge port 131 is not specifically limited.

[0038] Furthermore, the second end wall 134 is provided with a feed port 135, which is in communication with the filter cartridge 140, and is used to allow materials to enter so as to realize the feeding function. Specifically, by setting the discharge port 131 and the feed port 135, the material can be continuously fed and the material particles reaching the preset particle size can be discharged during the grinding process, thereby realizing continuous grinding of the material and improving the grinding efficiency.

[0039] Please refer to Figure 3 and Figure 4 The grinding rotor 120 includes a connecting shaft 121 and a stirring shaft 122. The driving mechanism 110 is connected to the connecting shaft 121 in a transmission manner, and the driving mechanism 110 is used to drive the connecting shaft 121 to rotate around its axial direction. The connecting shaft 121 extends into the filter barrel 140 and is rotatably connected to the sand mill bin 130. The connecting shaft 121 can rotate relative to the sand mill bin 130, and the sand mill bin 130 can support and limit the connecting shaft 121 to ensure the stability of the rotation of the connecting shaft 121. Specifically, the connecting shaft 121 is coaxially arranged with the filter barrel 140 and the sand mill bin 130. The stirring shaft 122 is connected to the connecting shaft 121 and is extended radially along the connecting shaft 121. The connecting shaft 121 is used to drive the grinding media and the material to move in the filter barrel 140 through the stirring shaft 122. In this process, the grinding function of the material is realized through the shear force and collision force between the grinding media.

[0040] It is worth noting that there are multiple stirring shafts 122, and the multiple stirring shafts 122 are divided into multiple groups. The multiple groups of stirring shafts 122 are arranged in parallel and spaced along the axial direction of the connecting shaft 121. The multiple stirring shafts 122 in each group are arranged in a circular array on the circumferential surface of the connecting shaft 121. The multiple groups of stirring shafts 122 work together to simultaneously drive the grinding medium and the material to move in the filter cylinder 140, thereby improving the stirring efficiency and thus improving the grinding efficiency.

[0041] The driving mechanism 110 includes a first driving member 111 and a belt transmission assembly. The first driving member 111 is connected to the grinding rotor 120 through the belt transmission assembly to drive the grinding rotor 120 to rotate. Specifically, the belt transmission assembly includes a first pulley 112, a transmission belt 113, and a second pulley 114. The first driving member 111 is connected to the first pulley 112, the first pulley 112 is connected to the second pulley 114 through the transmission belt 113, the second pulley 114 is connected to the grinding rotor 120, and the second pulley 114 is coaxially arranged with the connecting shaft 121 of the grinding rotor 120. The first driving member 111 is used to drive the first pulley 112 to rotate, and the first pulley 112 is used to drive the second pulley 114 to rotate through the transmission belt 113, thereby driving the grinding rotor 120 to rotate in the filter drum 140 to achieve the stirring and grinding function.

[0042] Furthermore, the diameter of the first pulley 112 is smaller than the diameter of the second pulley 114, so as to act as a reducer, reduce the rotation speed, increase the torque, and ensure the stability of the driving mechanism 110 driving the grinding rotor 120 to rotate, thereby improving the stability of the grinding process.

[0043] In this embodiment, the driving mechanism 110 includes a first driving member 111 and a belt transmission assembly, and the driving force of the first driving member 111 is transmitted to the grinding rotor 120 through the belt transmission assembly. However, it is not limited to this. In another embodiment, the driving mechanism 110 may only include the first driving member 111, and the first driving member 111 is directly connected to the grinding rotor 120; in another embodiment, the driving mechanism 110 includes the first driving member 111 and a gear transmission assembly, and the first driving member 111 is connected to the grinding rotor 120 through the gear transmission assembly; in another embodiment, the driving mechanism 110 includes the first driving member 111 and a chain transmission assembly, and the first driving member 111 is connected to the grinding rotor 120 through the chain transmission assembly; the transmission mode of the driving mechanism 110 is not specifically limited.

[0044] In this embodiment, the filter cartridge 140 is made of a ceramic filter material densely covered with a plurality of micropores, with a narrow pore size distribution, nanometer-level pores, and extremely high separation accuracy, so as to achieve the filtering function of nanometer-level particle-sized material particles, which is stable and reliable. However, it is not limited to this, and in other embodiments, the filter cartridge 140 can also be made of fiber filter material, paper filter material, or activated carbon filter material, and the material of the filter cartridge 140 is not specifically limited.

[0045] Please refer to Figure 5 The pushing mechanism 150 includes a second driving member 151 and a pushing member 152. The second driving member 151 is connected to the pushing member 152, and the pushing member 152 is movably disposed in the discharge cavity 160. The second driving member 151 is used to drive the pushing member 152 to move in the discharge cavity 160 to push the material particles in the discharge cavity 160 out of the discharge port 131, thereby realizing the discharge function.

[0046] In this embodiment, the pusher 152 is spiral-shaped, and the second driving member 151 is used to drive the pusher 152 to rotate in the discharge cavity 160, so as to continuously drive the material particles in the discharge cavity 160 to move toward the direction close to the discharge port 131, and make them flow out through the discharge port 131, thereby realizing the continuous discharge function of the material particles, improving the discharge efficiency, and ensuring the grinding efficiency. However, it is not limited to this. In other embodiments, the pusher 152 can also be annular. In this case, the second driving member 151 is used to drive the pusher 152 to translate along the axial direction of the discharge cavity 160 in the discharge cavity 160, and can also drive the material particles in the discharge cavity 160 to move toward the direction close to the discharge port 131, and make them flow out through the discharge port 131. The shape of the pusher 152 is not specifically limited.

[0047] In this embodiment, the first driving member 111 and the second driving member 151 are both driving motors, but this is not limited to this. In other embodiments, the first driving member 111 and the second driving member 151 can also be both pneumatic motors, or both hydraulic motors. There is no specific limitation on the types of the first driving member 111 and the second driving member 151.

[0048] The embodiment of the present invention provides a uniform particle size sand mill 100, in which the filter cylinder 140 is connected to the sand mill bin 130, and a discharge cavity 160 is formed between the sand mill bins 130. The driving mechanism 110 is transmission-connected to the grinding rotor 120, and the grinding rotor 120 extends into the filter cylinder 140. The driving mechanism 110 is used to drive the grinding medium and the material to move in the filter cylinder 140 through the grinding rotor 120 to grind the material into material particles. The filter cylinder 140 is used to allow material particles reaching a preset particle size to pass through. The sand mill bin 130 is provided with a discharge port 131, and a pushing mechanism 150 is installed in the discharge cavity 160. The pushing mechanism 150 is used to push the material particles in the discharge cavity 160 out of the discharge port 131. Compared with the prior art, the uniform-size sand mill 100 provided by the present invention adopts a filter cartridge 140 connected to the sand mill bin 130 and a pushing mechanism 150 installed in the discharge cavity 160. Therefore, it can filter and discharge material particles while ensuring grinding efficiency, so that the particle size distribution of the material particles is highly concentrated, the particle size uniformity is improved, and user needs are met.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A uniform particle size sand mill, characterized in that: It includes a driving mechanism, a grinding rotor, a sand mill bin, a filter cartridge and a pushing mechanism, the filter cartridge is connected to the sand mill bin, and a discharge cavity is formed between the sand mill bins, the driving mechanism is transmission-connected to the grinding rotor, the grinding rotor extends into the filter cartridge, the driving mechanism is used to drive the grinding medium and the material to move in the filter cartridge through the grinding rotor to grind the material into material particles, the filter cartridge is used to allow material particles reaching a preset particle size to pass through, the sand mill bin is provided with a discharge port connected to the discharge cavity, the pushing mechanism is installed in the discharge cavity, and the pushing mechanism is used to push the material particles in the discharge cavity out of the discharge port.

2. The uniform particle size sand mill according to claim 1, characterized in that: The sanding bin includes a first end wall, an annular cylinder wall and a second end wall. The first end wall and the second end wall are relatively arranged at the two ends of the annular cylinder wall and are both connected to the annular cylinder wall. The annular cylinder wall is coaxially arranged with the filter cylinder. The filter cylinder is sealed and connected between the first end wall and the second end wall. The discharge cavity is annular and is arranged between the annular cylinder wall and the filter cylinder. The discharge port is opened in the annular cylinder wall or the first end wall.

3. The uniform particle size sand mill according to claim 2, characterized in that: The second end wall is provided with a feed inlet, and the feed inlet is communicated with the filter cartridge.

4. The uniform particle size sand mill according to claim 1, characterized in that: The grinding rotor includes a connecting shaft and a stirring shaft. The driving mechanism is transmission-connected to the connecting shaft. The connecting shaft extends into the filter cartridge and is rotationally connected to the sanding chamber. The connecting shaft is coaxially arranged with the filter cartridge. The stirring shaft is connected to the connecting shaft and extends radially along the connecting shaft.

5. The uniform-size sand mill according to claim 4, characterized in that: There are multiple stirring shafts, which are divided into multiple groups. The multiple groups of stirring shafts are arranged in parallel and at intervals along the axial direction of the connecting shaft. The multiple stirring shafts in each group are arranged in a circular array on the circumference of the connecting shaft.

6. The uniform particle size sand mill according to claim 1, characterized in that: The driving mechanism includes a first driving member connected to the grinding rotor; Alternatively, the driving mechanism comprises a first driving member and a belt transmission assembly, wherein the first driving member is connected to the grinding rotor via the belt transmission assembly; Alternatively, the driving mechanism comprises a first driving member and a gear transmission assembly, and the first driving member is connected to the grinding rotor via the gear transmission assembly; Alternatively, the driving mechanism comprises a first driving member and a chain transmission assembly, and the first driving member is connected to the grinding rotor via the chain transmission assembly.

7. The uniform particle size sand mill according to claim 1, characterized in that: The filter cartridge is detachably connected to the sand mill bin, and the preset particle size of the material particles filtered by the filter cartridge is nanometer-level particle size, micrometer-level particle size or millimeter-level particle size.

8. The uniform-size sand mill according to claim 1, characterized in that: The filter cartridge is made of a ceramic filter material, a fiber filter material, a paper filter material or an activated carbon filter material densely covered with a plurality of micropores.

9. The uniform-size sand mill according to claim 1, characterized in that: The pushing mechanism comprises a second driving member and a pushing member, wherein the second driving member is connected to the pushing member, and the pushing member is movably disposed in the discharge cavity.

10. The uniform-size sand mill according to claim 9, characterized in that: The pusher is annular or spiral.

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