Sand mill

Abstract

The utility model discloses a sand mill and relates to the technical field of grinding. The sand mill comprises a cylinder body, a flow baffle, a main shaft and a stirring shaft, the main shaft is rotatably mounted in the barrel and is coaxial with the barrel, the stirring shaft is connected to the main shaft and extends in the radial direction of the main shaft, the main shaft is used for driving a friction medium and a material to move in the barrel through the stirring shaft, and the flow baffle is connected to the interior of the barrel and is spaced from the stirring shaft; and the difference between the minimum distance between the flow baffle and the stirring shaft and the diameter of the friction medium is 1-2mm. Compared with the prior art, the sand mill provided by the utility model has the advantages that the flow baffle plate connected in the cylinder body and the stirring shaft of which the minimum distance between the flow baffle plate and the stirring shaft is greater than the diameter of a friction medium are adopted, so that the laminar flow phenomenon can be avoided, the shearing force of the friction medium in the moving process is improved, the grinding efficiency is ensured, and the grinding effect is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding, in particular to a sand grinder. Background Art

[0002] As a type of grinding equipment developed from a ball mill, the sand mill boasts finer grinding particle sizes and better grinding quality. It disperses, crushes, grinds, homogenizes, and deagglomerates materials flowing through the cavity through the shear and collision forces between the friction media (zirconium beads or glass beads) within the cavity, making it one of the most applicable, advanced, and efficient grinding equipment for materials with the widest range of particle sizes. Current sand mills generally achieve a higher degree of mixing by increasing the stirring speed. However, as the speed increases, the material and friction media will move in a high-speed circular motion around the cylinder along with the stirring shaft, forming a laminar flow. This, in turn, reduces the shear force acting on the friction media during movement, resulting in reduced grinding efficiency and a poorer grinding effect.

[0003] In view of this, it is particularly important to design and manufacture a sand mill that can improve shear force and ensure grinding efficiency, especially in grinding production. Utility Model Content

[0004] The purpose of the utility model is to provide a sand mill that can avoid the occurrence of laminar flow phenomenon, improve the shear force of the friction medium during the movement process, ensure the grinding efficiency, and enhance the grinding effect.

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

[0006] A sand mill includes a barrel, a baffle, a main shaft and a stirring shaft. The main shaft is rotatably installed in the barrel and is coaxially arranged with the barrel. The stirring shaft is connected to the main shaft and extends radially along the main shaft. The main shaft is used to drive the friction medium and the material to move in the barrel through the stirring shaft. The baffle is connected to the barrel and is spaced apart from the stirring shaft. The difference between the minimum spacing between the baffle and the stirring shaft and the diameter of the friction medium is 1mm-2mm.

[0007] 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 main shaft, and a feed space is formed between two adjacent groups of stirring shafts. The multiple stirring shafts in each group are arranged in a circular array on the circumference of the main shaft.

[0008] Optionally, the baffle is arranged in a rectangular shape, the length direction of the baffle is the axial direction of the cylinder, the width direction of the baffle is the radial direction of the cylinder, and the position of the baffle corresponds to the position of the multiple groups of stirring shafts.

[0009] Optionally, the baffle includes a connecting portion and multiple extension portions, one side of the connecting portion is connected to the cylinder, and the other side is simultaneously connected to the multiple extension portions, the multiple extension portions are arranged in parallel and at intervals, and each extension portion extends into a material transfer space.

[0010] Optionally, the extension portion is arranged in a rectangular, triangular or trapezoidal shape.

[0011] Optionally, the baffle is welded, snap-fitted or connected to the cylinder body by mortise and tenon joints.

[0012] Optionally, the axial direction of the cylinder is horizontal, and the baffle is arranged on the top of the cylinder.

[0013] Optionally, there are three baffles, which are arranged in sequence and spaced apart.

[0014] Optionally, the axial direction of the cylinder is a vertical direction, and the baffle is arranged on the circumferential side of the cylinder.

[0015] Optionally, the number of the baffles is four, and the four baffles are arranged in a ring array.

[0016] The sand mill provided by the utility model has the following beneficial effects:

[0017] The sand mill provided by the present invention has a main shaft rotatably mounted within a barrel and coaxially arranged with the barrel. A stirring shaft is connected to the main shaft and extends radially along the main shaft. The main shaft is used to drive the friction medium and material to move within the barrel via the stirring shaft. A baffle is connected to the barrel and spaced apart from the stirring shaft. The difference between the minimum spacing between the baffle and the stirring shaft and the diameter of the friction medium is 1mm-2mm. Compared with the prior art, the sand mill provided by the present invention can avoid the occurrence of laminar flow, improve the shear force of the friction medium during movement, ensure grinding efficiency, and enhance the grinding effect due to the use of a baffle connected to the barrel and a stirring shaft with a minimum spacing between the baffle and the baffle greater than the diameter of the friction medium. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 A schematic structural diagram of a sand mill provided in a first embodiment of the present invention from one perspective;

[0020] Figure 2 A schematic structural diagram of the sand mill provided by the first embodiment of the present utility model from another perspective;

[0021] Figure 3 A schematic structural diagram of a sand mill provided in a second embodiment of the present invention when the extension portion is arranged in a rectangular shape;

[0022] Figure 4 A schematic structural diagram of a sand mill provided in a second embodiment of the present invention when the extension portion is arranged in a triangular shape;

[0023] Figure 5 This is a structural schematic diagram of a sand grinder provided in the second embodiment of the present invention when the extension portion is arranged in a trapezoidal shape.

[0024] Icon: 100-sand mill; 110-cylinder; 120-baffle; 121-connecting part; 122-extension part; 130-main shaft; 140-mixing shaft. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein 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 claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also 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, it does not need to be further defined or explained in subsequent drawings.

[0028] In the description of this utility model, it should be noted that the terms "inner," "outer," "upper," "lower," and "horizontal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and should not be construed as indicating or implying relative importance.

[0029] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0031] First embodiment

[0032] Please refer to Figure 1 and Figure 2 The present invention provides a sand mill 100 for grinding materials. The sand mill 100 can avoid the occurrence of laminar flow, increase the shear force of the friction medium during movement, ensure grinding efficiency, and enhance the grinding effect.

[0033] The sand mill 100 includes a barrel 110, a baffle 120, a drive motor (not shown), a main shaft 130, and an agitator shaft 140. The drive motor is connected to the main shaft 130, which is rotatably mounted within the barrel 110 and coaxially disposed with the barrel 110. The drive motor is used to drive the main shaft 130 to rotate relative to the barrel 110. The agitator shaft 140 is connected to the main shaft 130 and extends radially therefrom. The main shaft 130, via the agitator shaft 140, is used to drive the friction medium and the material to move within the barrel 110. During this process, the shear and collision forces between the friction medium achieve the grinding function of the material. Specifically, the baffle 120 is connected to the cylinder 110 and is spaced apart from the stirring shaft 140 to avoid interfering with the rotation of the stirring shaft 140. The baffle 120 can block the friction medium and the material to prevent the friction medium and the material from forming laminar flow as the stirring shaft 140 makes high-speed circular motion around the cylinder 110, thereby increasing the turbulence of the friction medium and the material during the circular motion, thereby increasing the shear force between the friction media while ensuring the mixing degree, ensuring the grinding efficiency, and enhancing the grinding effect.

[0034] Furthermore, the difference between the minimum distance between the baffle 120 and the agitator shaft 140 and the diameter of the friction medium is 1 mm to 2 mm. The minimum distance between the baffle 120 and the agitator shaft 140 is the distance between the baffle 120 and the agitator shaft 140 when the agitator shaft 140 rotates to a position corresponding to the baffle 120. If the difference between the minimum distance between the baffle 120 and the agitator shaft 140 and the diameter of the friction medium is too large, it will cause excessive flow resistance within the cylinder 110, increasing the equipment load. If the difference between the minimum distance between the baffle 120 and the agitator shaft 140 and the diameter of the friction medium is too small, the friction medium may become stuck between the baffle 120 and the agitator shaft 140, causing equipment failure. For ease of understanding, the minimum distance between the baffle 120 and the agitator shaft 140 is denoted as a.

[0035] In this embodiment, the friction medium is zirconium beads, but is not limited thereto. In other embodiments, the friction medium may also be glass beads. The type of friction medium is not specifically limited.

[0036] It is worth noting that there are multiple stirring shafts 140, and the multiple stirring shafts 140 are divided into multiple groups. The multiple groups of stirring shafts 140 are arranged in parallel and spaced apart along the axial direction of the main shaft 130, and a material transfer space is formed between two adjacent groups of stirring shafts 140. The multiple stirring shafts 140 in each group are arranged in a circular array on the circumference of the main shaft 130. The multiple groups of stirring shafts 140 work together to simultaneously drive the friction medium and the material to move in the cylinder 110, thereby improving the stirring efficiency and thus improving the grinding efficiency.

[0037] In this embodiment, the baffle 120 is arranged in a rectangular shape, the length direction of the baffle 120 is the axial direction of the cylinder 110, and the width direction of the baffle 120 is the radial direction of the cylinder 110. The position of the baffle 120 corresponds to the position of the multiple groups of stirring shafts 140. The baffle 120 can simultaneously block the friction medium and material driven by the multiple groups of stirring shafts 140 to prevent them from making high-speed circular motion around the cylinder 110 and forming laminar flow. The baffle has a good baffle effect, ensures the stable formation of turbulence, increases the shear force of the friction medium during movement, ensures grinding efficiency, and enhances the grinding effect.

[0038] In this embodiment, the baffle 120 is welded to the cylinder 110, but is not limited thereto. In other embodiments, the baffle 120 may be snap-fitted to the cylinder 110 or connected to the cylinder 110 by mortise and tenon joints. The connection method between the baffle 120 and the cylinder 110 is not specifically limited.

[0039] In this embodiment, the axial direction of the cylinder 110 is horizontal, that is, the sand mill 100 is a horizontal sand mill. At this time, the baffle 120 is arranged at the top of the cylinder 110. Due to the gravity of the object, the friction medium and material blocked by the baffle 120 will fall downward to avoid forming a stirring dead angle. Similarly, if the baffle 120 is set at the bottom of the cylinder 110, a stirring dead angle will be formed, and the friction medium and material blocked by the baffle 120 will not easily flow out, resulting in insufficient mixing.

[0040] In this embodiment, there is one baffle 120, which is located in the center of the top of the cylinder 110. However, this is not limiting. In other embodiments, there may be three baffles 120, each of which is spaced apart and serves to block the friction medium and material, further preventing laminar flow, improving the blocking effect, increasing turbulence, and enhancing grinding efficiency.

[0041] In another embodiment, the axial direction of the cylinder 110 is vertical, that is, the sand mill 100 is a vertical sand mill, and the baffles 120 are arranged on the circumference of the cylinder 110. Furthermore, there are four baffles 120, which are arranged in a circular array. The four baffles 120 are used to block the friction medium and the material, further preventing the occurrence of laminar flow, improving the blocking effect, increasing turbulence, and improving grinding efficiency.

[0042] The sand mill 100 provided by the present invention has a main shaft 130 rotatably mounted within a barrel 110 and coaxially disposed with the barrel 110. A stirring shaft 140 is connected to the main shaft 130 and extends radially along the main shaft 130. The main shaft 130 is used to drive the friction medium and the material to move within the barrel 110 via the stirring shaft 140. The baffle 120 is connected to the barrel 110 and spaced apart from the stirring shaft 140. The difference between the minimum spacing between the baffle 120 and the stirring shaft 140 and the diameter of the friction medium is 1 mm to 2 mm. Compared with the prior art, the sand mill 100 provided by the present invention can avoid the occurrence of laminar flow, improve the shear force of the friction medium during movement, ensure grinding efficiency, and enhance the grinding effect due to the use of the baffle 120 connected to the barrel 110 and the stirring shaft 140 having a minimum spacing greater than the diameter of the friction medium.

[0043] Second embodiment

[0044] Please refer to Figures 3 to 5 The embodiment of the present invention provides a sand mill 100 . Compared with the first embodiment, the difference of this embodiment is that the structure of the baffle 120 is different.

[0045] In this embodiment, the baffle 120 includes a connecting portion 121 and a plurality of extension portions 122. The connecting portion 121 is rectangular, with the length of the connecting portion 121 being axially aligned with the cylinder 110 and the width of the connecting portion 121 being radially aligned with the cylinder 110. The position of the connecting portion 121 corresponds to the position of the plurality of stirring shafts 140. One side of the connecting portion 121 is connected to the cylinder 110, and the other side is connected to the plurality of extension portions 122. The plurality of extension portions 122 are arranged in parallel and spaced apart, and each extension portion 122 extends into a feed space. The extension portions 122 are used to block a portion of the friction medium and material in the feed space, thereby further preventing the occurrence of laminar flow, enhancing the blocking effect, increasing turbulence, and improving grinding efficiency.

[0046] Preferably, the extension portion 122 is rectangular, triangular or trapezoidal in shape to meet different grinding requirements and facilitate processing.

[0047] The beneficial effects of the sand grinder 100 provided by the embodiment of the present invention are the same as those of the first embodiment, and will not be described in detail here.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A sand mill, characterized in that: It includes a cylinder, a baffle, a main shaft and a stirring shaft. The main shaft is rotatably installed in the cylinder and is coaxially arranged with the cylinder. The stirring shaft is connected to the main shaft and extends radially along the main shaft. The main shaft is used to drive the friction medium and material to move in the cylinder through the stirring shaft. The baffle is connected to the cylinder and is spaced apart from the stirring shaft. The minimum distance between the baffle and the stirring shaft is 1mm-2mm different from the diameter of the friction medium.

2. The sand mill according to claim 1, characterized in that There are multiple stirring shafts, and the multiple stirring shafts are divided into multiple groups. The multiple groups of stirring shafts are arranged in parallel and at intervals along the axial direction of the main shaft, and a material transfer space is formed between two adjacent groups of stirring shafts. The multiple stirring shafts in each group are arranged in a circular array on the circumferential surface of the main shaft.

3. The sand mill according to claim 2, characterized in that The baffle is arranged in a rectangular shape, the length direction of the baffle is the axial direction of the cylinder, the width direction of the baffle is the radial direction of the cylinder, and the position of the baffle corresponds to the position of the multiple groups of stirring shafts.

4. The sand mill according to claim 2, characterized in that The baffle includes a connecting portion and multiple extension portions. One side of the connecting portion is connected to the cylinder, and the other side is simultaneously connected to multiple extension portions. The multiple extension portions are arranged in parallel and spaced apart, and each extension portion extends into one of the material transfer spaces.

5. The sand mill according to claim 4, characterized in that The extension portion is arranged in a rectangular, triangular or trapezoidal shape.

6. The sand mill according to claim 1, characterized in that The baffle is welded, clamped or connected with the cylinder by mortise and tenon joints.

7. The sand mill according to claim 1, wherein The axial direction of the cylinder is horizontal, and the baffle is arranged on the top of the cylinder.

8. The sand mill according to claim 7, characterized in that The number of the baffles is three, and the three baffles are arranged in sequence at intervals.

9. The sand mill according to claim 1, wherein: The axial direction of the cylinder is a vertical direction, and the baffle is arranged on the circumference of the cylinder.

10. The sand mill according to claim 9, characterized in that The number of the baffles is four, and the four baffles are arranged in a ring array.

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