Anti-blocking grinding cylinder and sand mill

Abstract

The anti-blocking grinding cylinder comprises a cylinder body, an upper cover, a lower cover and a one-way switch assembly, the upper cover is arranged on one side of the cylinder body, and a mounting opening is formed in the center of the upper cover; the lower cover, the cylinder body and the upper cover are encircled to form an accommodating space, and the lower cover is provided with a feeding hole; the one-way switch assembly is arranged at the feeding port and used for controlling the grinding materials to be injected into the containing space in a one-way mode. According to the anti-blocking grinding cylinder, the one-way switch assembly is arranged, so that the anti-blocking grinding cylinder is connected with an external pipeline to inject grinding materials, meanwhile, a grinding medium can be effectively prevented from entering the external pipeline, machining is easy and convenient, and the cost is low. Meanwhile, the invention further provides a sand mill adopting the anti-blocking grinding cylinder. Due to the fact that the external pipeline is not prone to being blocked, feeding and processing stages are smoother, and feeding and processing efficiency of grinding materials is improved.

Description

[Technical field]

[0001] The invention relates to the technical field of grinding, and in particular to an anti-clogging grinding cylinder and a sand mill. [Background technology]

[0002] Sand mill is one of the key equipment for preparing fine materials, also known as bead mill or ball mill. Sand mill uses the grinding media to give it enough kinetic energy under the high-speed rotation of the dispersing blades, so that the grinding media and the grinding materials collide and squeeze to generate shear force, which plays a grinding role.

[0003] The sand mill is mainly composed of a frame, a drive assembly, and a grinding assembly. The grinding cylinder in the grinding assembly is used to store grinding media and grinding materials. When the sand mill is working, the grinding medium is filled in the grinding cylinder, which is made of ceramic or special materials and is in the shape of spherical particles of varying sizes. Then, the grinding materials are added from the bottom of the grinding cylinder and mixed with the grinding media.

[0004] However, the sand mill in the prior art is directly connected to the bottom of the grinding cylinder through a pipeline, which is very inconvenient to use. Figure 1 , Figure 1 The figure is a cross-sectional view of the anti-clogging grinding cylinder in the prior art. When the injection of the grinding material into the anti-clogging grinding cylinder is stopped, the grinding medium will flow from the bottom of the grinding cylinder into the pipeline due to gravity, thereby blocking the pipeline and seriously affecting the efficiency of the injection of the grinding material. Moreover, when the pipeline is blocked, it is very inconvenient to inspect and replace it. During the processing, the grinding environment in the grinding cylinder has high hygiene requirements, especially when grinding pharmaceutical or cosmetic materials. Frequent inspection and replacement will not only affect the processing efficiency, but also pollute the grinding material, resulting in material waste. [Summary of the invention]

[0005] The present invention provides an anti-clogging grinding cylinder and a sand mill for solving the above-mentioned easy-clogging problem, so as to improve the processing efficiency of the grinding material.

[0006] The present invention provides an anti-clogging grinding cylinder, comprising a cylinder body, an upper cover, a lower cover and a one-way switch assembly, wherein the upper cover is arranged on one side of the cylinder body and a mounting opening is opened at the center; the lower cover, the cylinder body and the upper cover together form a receiving space, and the lower cover is provided with a feed port; the one-way switch assembly is arranged at the feed port and is used for one-way control of injecting grinding materials into the receiving space.

[0007] The present invention provides a grinding machine, comprising a frame, a driving assembly and a grinding assembly, wherein the driving assembly is arranged on the frame, and the grinding assembly is arranged below the driving assembly; the grinding assembly comprises a grinding rotor and an anti-clogging grinding cylinder, wherein the grinding rotor is accommodated in the anti-clogging grinding cylinder; the anti-clogging grinding cylinder comprises a cylinder body, an upper cover, a lower cover and a one-way switch assembly, wherein the upper cover is arranged on one side of the cylinder body and a mounting opening is opened at the center; the lower cover, the cylinder body and the upper cover are combined to form a receiving space, and the lower cover is provided with a feed port; the one-way switch assembly is arranged at the feed port and is used for one-way control of injecting grinding materials into the receiving space.

[0008] Compared with the prior art, the anti-clogging grinding cylinder provided by the present invention can effectively block the grinding medium from entering the external pipeline while being connected to the external pipeline through the setting of the one-way switch assembly to inject the grinding material. During the grinding process, the one-way switch assembly remains in a closed state, and the grinding medium cannot pass through; when injecting the grinding material, the one-way switch assembly remains in an open state, facilitating the entry of the grinding material.

[0009] In addition, the anti-clogging grinding cylinder has a simple design structure, and the feed port can block the grinding medium only by setting the one-way switch component, which is easy to process and has low cost.

[0010] The sand mill using the anti-clogging grinding cylinder of the present invention is not likely to cause blockage of the external pipeline, so the feeding and processing stages are smoother, thereby improving the feeding and processing efficiency of the grinding material.

Brief Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0012] Figure 1 is a cross-sectional view of the anti-clogging grinding cylinder in the prior art;

[0013] Figure 2 is a schematic diagram of the three-dimensional structure of the sand mill provided by the present invention;

[0014] Figure 3 is a cross-sectional view of a first embodiment of the anti-clogging grinding cylinder provided by the present invention;

[0015] Figure 4 yes Figure 3 An enlarged cross-sectional view of the one-way switch assembly shown;

[0016] Figure 5 yes Figure 3 The one-way switch assembly is shown as a three-dimensional exploded schematic diagram;

[0017] Figure 6 is an enlarged cross-sectional view of the one-way switch assembly in the second embodiment of the anti-clogging grinding cylinder provided by the present invention;

[0018] Figure 7 yes Figure 6 The one-way switch assembly is shown as a three-dimensional exploded schematic diagram;

[0019] Figure 8 is an enlarged cross-sectional view of the one-way switch assembly of the third embodiment of the anti-clogging grinding cylinder provided by the present invention; and

[0020] Fig. 9 yes Figure 8 The one-way switch assembly is shown as a three-dimensional exploded schematic diagram. [Specific implementation method]

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0022] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] See also Figure 2 The sand mill 100 includes a frame 1, a driving assembly 3 and a grinding assembly 5. The driving assembly 3 is arranged on the frame 1, and the grinding assembly 5 is arranged below the driving assembly 3. In this embodiment, the driving assembly 3 and the grinding assembly 5 are both arranged on the frame 1, and the driving assembly 3 and the grinding assembly 5 are installed and fixed by the frame 1. Since the overall gravity of the driving assembly 3 and the grinding assembly 5 is relatively large during the actual production and processing process, the grinding assembly 5 cannot be fixed only by the driving assembly 3, so it is necessary to provide support for the grinding assembly 5 separately. Of course, the frame 1 that provides support for the driving assembly 3 and the grinding assembly 5 can be set as a whole, or can be set separately at intervals, which is not limited here.

[0027] In addition, the specific structure of the frame 1, and the specific layout of the drive assembly 3 and the grinding assembly 5 are not limited here. As in the present embodiment, the drive assembly 3 can be horizontally arranged on the top of the frame 1, and the grinding assembly 5 can be arranged on one side of the frame 1, or the grinding assembly 5 can be arranged in the middle position of the frame 1, as long as it is a layout for vertical processing.

[0028] The grinding assembly 5 includes a grinding rotor 6 and an anti-clogging grinding cylinder 7, wherein the grinding rotor 6 is connected to the driving assembly 3 and is contained in the anti-clogging grinding cylinder 7. The anti-clogging grinding cylinder 7 is mainly used for injecting and storing grinding materials (not shown) and grinding media 200, and the grinding rotor 6 rotates at a high speed, thereby grinding the grinding materials through the grinding media 200. The structure of the grinding rotor 6 is not further limited here, and existing products on the market can be selected and connected to the driving assembly 3. Of course, the driving assembly 3 can choose to set a long axis on the motor (not shown) to realize the integrated setting of the grinding rotor 6 and the driving assembly 3, or it can be connected by setting a transmission member (not shown) between the motor and the grinding rotor 6. Among them, the transmission member can be a rigid transmission structure or a flexible transmission structure, such as a coupling transmission, a gear transmission or a pulley transmission, etc., which will not be described in detail here.

[0029] Please refer to Figure 3 , Figure 4 and Figure 5 , Figure 3 is a cross-sectional view 77 of the first embodiment of the anti-clogging grinding cylinder 7 provided by the present invention, Figure 4 yes Figure 3 The enlarged cross-sectional view of the one-way switch assembly 77 shown in FIG. Figure 5 yes Figure 3 The one-way switch assembly is shown in a three-dimensional exploded schematic diagram. The anti-clogging grinding cylinder 7 includes a cylinder body 71, an upper cover 73, a lower cover 75 and a one-way switch assembly 77. The upper cover 73 is arranged on one side of the cylinder body 71, and a mounting port 731 is opened at the center. The grinding rotor 6 is connected to the driving assembly 3 through the mounting port 731. The structure of the mounting port 731 is arranged corresponding to the grinding rotor 6 to ensure the sealing effect of the anti-clogging grinding cylinder 7, which is not limited here.

[0030] The lower cover 75, the barrel 71 and the upper cover 73 together form a receiving space 79, and the lower cover 75 is provided with a feed port 751. During the processing, the grinding medium 200 and the grinding material are both located in the receiving space 79, and the receiving space 79 is sealed to prevent leakage of the grinding medium 200 and the grinding material, and also ensure that the entire processing environment meets the grinding material processing requirements.

[0031] The one-way switch assembly 77 is provided at the feed port 751, and is used to unidirectionally control the external pipe 300 to inject the grinding material into the receiving space. In this embodiment, the one-way switch assembly 77 is provided between the feed port 751 and the external pipe 300, and is provided from the feed port 751 toward the side away from the lower cover. Of course, in another embodiment, the one-way switch assembly 77 can also be provided from the feed port 751 toward the side of the receiving space 79, or through the feed port 751, which will not be described in detail here. The anti-blocking grinding cylinder 7 effectively blocks the grinding medium 200 by providing the one-way switch assembly 77, thereby avoiding blocking of the external pipe 300.

[0032] The one-way switch assembly 77 includes a first division 771, a second division 773 and a movable part 775. The first division 771 is provided with a first flow channel 772 relative to the receiving space 79; the second division 773 is provided below the first division 771, and the second division 773 is provided with a second flow channel 774 relative to the first flow channel 772; the movable part 775 is provided between the first division 771 and the second division 773, and cooperates with the first division 771 and the second division 773 to control the conduction state between the first flow channel 772 and the second flow channel 774, or to control the conduction state between the first flow channel 772 and the receiving space 79.

[0033] The one-way switch assembly 77 can control the conduction state between the external pipe 300 and the receiving space 79 by setting the first subsection 771, the second subsection 773 and the movable member 775. When setting the movable member 775, the structural dimensions of the first flow channel 772 and the second flow channel 774 can be set relative to the movable member 775 to ensure that when the movable member 775 is controlled to move between the first subsection 771 and the second subsection 773, the movable member 775 switches between blocking one of the flow channels and conducting two flow channels. For example, when the movable member 775 abuts the second subsection 773, the second flow channel 774 can be blocked. When the movable member 775 moves to abut the first subsection 771, the first flow channel 772 and the second flow channel 774 are simultaneously conducted, thereby achieving a single-phase conduction effect. This setting method is simple and practical, and can smoothly pass the grinding material without blocking the external pipe 300.

[0034] It should be noted that the second sub-portion 773 and the first sub-portion 771 can be separated from the lower cover 75, or can be integrated. The integrated arrangement is mainly beneficial to improving the sealing effect and reducing the risk of leakage at the connection between the two. The integrated arrangement is not only beneficial to the sealing effect, but also reduces the parts that need to be disassembled and assembled, greatly simplifying the disassembly and assembly steps.

[0035] In the first embodiment, the movable part 775 is a spherical structure, the second division 773 and the first division 771 cooperate with each other to form an active cavity 776, and the movable part 775 is accommodated in the active cavity 776; the first division 771 is provided with an arc-shaped ridge 7711, and the ridge 7711 gradually approaches the center from bottom to top, and the second division 773 is provided with a concave arc-shaped first limiting groove 7731, and the first limiting groove 7731 gradually approaches the center from top to bottom; when the movable part 775 is in a stationary state, it is tightly fitted with the first limiting groove 7731, and the first flow channel 772 and the second flow channel 774 are closed; when the grinding material is injected, the movable part 775 is tightly fitted with the ridge 7711, and the first flow channel 772 and the second flow channel 774 are connected.

[0036] In addition, a sealing ring 777 is provided between the first sub-section 771 and the second sub-section 773. Since the movable part 775 is provided in the movable cavity 776, in order to solve the installation problem of the movable part 775, in the second embodiment, the first sub-section 771 and the second sub-section 773 are provided separately. By providing the sealing ring 777, it is ensured that the first sub-section 771 and the second sub-section 773 are closely fitted to avoid leakage of the grinding flow flowing through the first flow channel 772 and the second flow channel 774. Of course, if the second sub-section 773 and the lower cover 75 or the first sub-section 771 and the lower cover 75 are also provided separately, the sealing ring 777 can also be provided at the connection between the two to improve the overall sealing effect of the one-way switch assembly 77.

[0037] The one-way switch assembly 77 sets the limit position of the movable member 775 through the first sub-portion 771 and the second sub-portion 773. The structural design is simple and ingenious. One-way conduction can be achieved without manual or electric control of the movable member 775. The specific implementation principle is described as follows:

[0038] When the grinding material is not injected or is being processed, the movable part 775 is tightly fitted with the second sub-portion 773 due to the effect of gravity; the first limiting groove 7731 is an inwardly concave arc-shaped structure, and the first limiting groove 7731 gradually approaches the center from top to bottom, which can just achieve the fit between the second sub-portion 773 and the movable part 775, and no matter how the movable part 775 rotates and moves, it can be tightly fitted without any relative position relationship; at this time, the second flow channel 774 is blocked by the movable part 775, and the grinding medium 200 cannot enter the external pipe 300 through the first flow channel 772, and it will also be affected by gravity, pressing the movable part 775, so that the movable part 775 and the second sub-portion 773 fit more tightly;

[0039] When the grinding material needs to be injected, due to the impact force of the inflow of the grinding material, the movable part 775 will be pushed by the grinding material to the point of contact with the first division 771; the arc-shaped ridge 7711 of the first division 771 can not only be used to limit the movable part 775 from continuing to move upward, but also guide the movable part 775 to move toward the center, thereby making the first flow channel 772 and the second flow channel 774 conductive, and the grinding material flows through the second flow channel 774 and the first flow channel 772 into the receiving space 79.

[0040] It should be noted that the first flow channel 772 can be two or more and spaced apart from each other. In this embodiment, the first subdivision 771 is provided with a plurality of first through holes 77715, which are arranged in the central area and the circumference of the central area. This arrangement can not only effectively support the position limiting of the movable member 775, but also increase the speed of the grinding material passing as much as possible, thereby improving the feeding efficiency. In addition, the movable member 775 is set as a spherical structure, which is not only convenient for cooperating with the convex ridge 7711 and the first limiting groove 7731 to realize the conduction of the first flow channel 772, but also because the spherical structure is wear-resistant and can extend its service life.

[0041] Please continue reading Figure 6 and Figure 7 , Figure 6 It is an enlarged cross-sectional view of the one-way switch assembly 77 in the second embodiment of the anti-clogging grinding cylinder 7 provided by the present invention. Figure 7 yes Figure 6The one-way switch assembly 77 is shown in a three-dimensional exploded schematic diagram. The movable member 775 is a piston structure. The first subdivision 771 is provided with a second limiting groove 7713. The movable member 775 includes a fixed block 7751, a screw rod 7753 and a stopper 7755. The fixed block 7751 is fixedly arranged in the first subdivision 771, the second subdivision 773 or between the first subdivision 771 and the second subdivision 773. The screw rod 7753 is movably connected to the fixed block 7751 and moves up and down along the first flow channel 772 relative to the fixed block 7751. The stopper 7755 is arranged at one end of the screw rod 7753 relative to the second limiting groove 7713 and is located in the first flow channel 772.

[0042] The one-way switch assembly 77 limits the movable member 775 through the first sub-portion 771 and / or the second sub-portion 773, and also can realize one-way conduction control without manual or electric control; moreover, the movable member 775 realizes the connection of the stopper 7755 through the screw rod 7753, and will not occupy too much of the first flow channel 772. The first flow channel 772 and the second flow channel 774 can both be expanded as much as possible, thereby increasing the flow rate of the grinding material and further improving the feeding efficiency. The specific implementation principle is described as follows:

[0043] When the grinding material is not injected or is being processed, the movable member 775 is in a stationary state, the stopper 7755 is tightly fitted with the second limiting groove 7713, the first flow channel 772 and the receiving space 79 are closed, and the first flow channel 772 and the receiving space 79 are not connected; at this time, the first flow channel 772 is blocked by the movable member 775, the grinding medium 200 cannot enter the external pipe 300 through the first flow channel 772, and is also affected by gravity to press the movable member 775, so that the movable member 775 and the first sub-portion 771 are more tightly fitted;

[0044] When the grinding material needs to be injected, the blocking block 7755 and the screw rod 7753 move upward relative to the fixed block 7751, the first flow channel 772 is connected to the receiving space 79, and the grinding material flows through the second flow channel 774 and the first flow channel 772 into the receiving space 79.

[0045] It should be noted that the size structure of the second limiting groove 7713 corresponds to the block 7755, ensuring that the block 7755 can block the first flow channel 772, and no specific restrictions are made here; the fixed block 7751 can be directly fixedly connected to the first subsection 771, or fixedly connected to the second subsection 773, or arranged between the first subsection 771 and the second subsection 773, for limiting the block 7755 and the screw rod 7753, and preventing the block 7755 and the screw rod 7753 from continuing to move upward along the first flow channel 772. In this embodiment, the fixed block 7751 includes a sheet-like structure 7757, and a second through hole 7759 is opened in the middle of the sheet-like structure 7757, so that the fixed block 7751 can increase the area through which the grinding material flows while being fully fixed and stressed.

[0046] In addition, in the second embodiment, different from the first embodiment, the first sub-portion 771 and the second sub-portion 773 can also be integrated to enhance the sealing effect of the one-way switch assembly 77 .

[0047] Please continue to refer to Figure 8 and Fig. 9 , Figure 8 is an enlarged cross-sectional view of the one-way switch assembly 77 in the third embodiment of the anti-clogging grinding cylinder 7 provided by the present invention, Fig. 9 yes Figure 8 The one-way switch assembly 77 is shown as a three-dimensional exploded schematic diagram. The one-way switch assembly 77 further includes a columnar protrusion 770, which protrudes from the first sub-portion toward the receiving space and is located in the receiving space 79. A third flow channel 778 is provided in the protrusion 770 relative to the first flow channel 774.

[0048] The grinding material enters the receiving space 79 from the external pipe 300, the second flow channel 774, the first flow channel 772 and the third flow channel 778. Due to the protruding setting of the protruding portion 770, the grinding medium 200 is distributed at the bottom of the anti-clogging grinding cylinder 7, that is, in the direction close to the lower cover 75, and it is difficult for the grinding medium 200 to cross the protruding portion 770 and enter the third flow channel 778. The one-way switch assembly 77 is provided with the blocking of the protruding portion 770, so that a large amount of the grinding medium 200 will not be accumulated on the one-way switch assembly 77, which not only achieves a better blocking effect, but also makes it easier to control the conduction of the one-way switch assembly 77.

[0049] It should be emphasized here that the height of the protruding portion 770 relative to the bottom cover is generally between 1.5 cm and 20 cm. If it is less than 1.5 cm, it is difficult to achieve effective blocking, and the grinding medium 200 is more likely to pass over the protruding portion 770 and enter the third flow channel 778; if it is higher than 20 cm, it will affect the setting of the grinding rotor 6 and increase the processing cost. This setting distance range not only saves costs and does not affect the setting of other structures, but also can effectively block the grinding medium 200, which is simple and convenient. In addition, the structure of the protruding portion 770 can be a cylinder, a square cylinder or other cylindrical structure. Here, a cylindrical shape is preferred, which is conducive to processing and production, and each surface is in uniform contact with the grinding medium 200 to reduce wear, thereby increasing the service life of the protruding portion 770.

[0050] Correspondingly, the protrusion 770 is integrated with the lower cover and / or the first sub-portion, so that there is a better sealing effect between the protrusion 770 and the lower cover 75.

[0051] In order to achieve a better blocking effect, the one-way switch assembly 77 further includes a filter 779, which is disposed above the protrusion 770. Since the protrusion 770 extends upward from the lower cover 75, the grinding medium 200 may more or less enter the third flow channel 778. However, by arranging the filter 779 above the protrusion 770, the grinding medium 200 that enters the third flow channel 778 from top to bottom due to gravity can be further blocked.

[0052] The specific structure of the filter unit 779 is not specifically limited here, and a brief description is given taking this embodiment as an example.

[0053] First, as to the connection position, the filter portion 779 can be connected to the raised portion 770, or can be connected to the lower cover 75, extending from bottom to top; it can also be connected to the grinding rotor 6, extending from top to bottom; or it can be a combination of two or three methods to ensure that the filter portion 779 is set at a position above the raised portion 770.

[0054] Secondly, for the filtering structure, the filtering part 779 can be set in a mesh, strip shape or a way of not having holes on the side directly above the raised part 770 to ensure that the grinding medium 200 cannot directly pass through the raised part 770 from top to bottom into the third flow channel 778.

[0055] Finally, regarding the selection of materials, the portion of the filter portion 779 directly above the protrusion 770 can be made of either rigid material or flexible material, but the filtering effect needs to be ensured. For example, when the portion directly above the protrusion 770 is made of a flexible material, a stretching structure needs to be provided around the flexible material to ensure that the flexible material can be fully expanded without positional displacement or material curling as the grinding material is processed.

[0056] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An anti-clogging grinding cylinder, characterized in that: include: Cylinder; An upper cover, which is arranged on one side of the cylinder and has a mounting opening at the center; A lower cover, wherein the lower cover, the cylinder body and the upper cover together form a receiving space, and the lower cover is provided with a feed port; and A one-way switch component is arranged at the feed port and is used for one-way controlling an external pipeline to inject the grinding material into the receiving space.

2. The anti-clogging grinding cylinder according to claim 1, characterized in that: The one-way switch assembly comprises: a first subdivision, wherein the first subdivision is provided with a first flow channel; a second section, the second section being disposed below the first section and having a second flow channel disposed opposite to the first flow channel; and The movable part is movably arranged between the first sub-part and the second sub-part, and cooperates with the first sub-part and the second sub-part to control the conduction state between the first flow channel and the second flow channel, or controls the conduction state between the first flow channel and the receiving space.

3. The anti-clogging grinding cylinder according to claim 2, characterized in that: The movable member is a spherical structure, the second sub-portion cooperates with the first sub-portion to form a movable cavity, and the movable member is accommodated in the movable cavity; The first sub-portion is provided with an arc-shaped convex ridge, and the convex ridge gradually approaches the center from bottom to top, and the second sub-portion is provided with an inwardly concave arc-shaped first limiting groove, and the first limiting groove gradually approaches the center from top to bottom; When the movable part is in a stationary state, it is tightly fitted with the first limiting groove, and the first flow channel and the second flow channel are closed; when the grinding material is injected, the movable part is tightly fitted with the convex edge, and the first flow channel and the second flow channel are connected.

4. The anti-clogging grinding cylinder according to claim 3, characterized in that: A sealing ring is provided between the first sub-portion and the second sub-portion.

5. The anti-clogging grinding cylinder according to claim 2, characterized in that: The movable part is a piston structure, the first sub-part is provided with a second limiting groove, and the movable part comprises: a fixed block, the fixed block being fixedly disposed at the first sub-portion, the second sub-portion, or between the first sub-portion and the second sub-portion; a screw rod, the screw rod being movably connected to the fixed block and moving up and down along the first flow channel relative to the fixed block; and A block, wherein the block is arranged at one end of the screw rod relative to the second limiting groove and is located in the first flow channel; when the movable part is in a stationary state, the block is tightly fitted with the second limiting groove, and the first flow channel and the receiving space are closed; when the grinding material is injected, the block and the screw rod move upward relative to the fixed block, and the first flow channel and the receiving space are connected.

6. The anti-clogging grinding cylinder according to claim 2, characterized in that: The second section is integrated with the connecting section, and / or the first section is integrated with the lower cover.

7. The anti-clogging grinding cylinder according to claim 2, characterized in that: The one-way switch assembly further includes a columnar protrusion, which protrudes from the first sub-portion toward the receiving space, and a third flow channel is disposed in the protrusion relative to the first flow channel.

8. The anti-clogging grinding cylinder according to claim 7, characterized in that: The protrusion is integrally arranged with the lower cover and / or the first sub-portion.

9. The anti-clogging grinding cylinder according to claim 7, characterized in that: The one-way switch assembly further includes a filter portion, and the filter portion is disposed above the protrusion.

10. A sand mill, characterized in that: include: frame; A driving assembly, wherein the driving assembly is arranged on the frame; and A grinding assembly, the grinding assembly is arranged below the driving assembly, and the grinding assembly includes: a grinding rotor, the grinding rotor being connected to the driving assembly through the mounting port; and The anti-clogging grinding cylinder according to claim 1 to claim 9, wherein the grinding rotor is accommodated in the anti-clogging grinding cylinder.

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