Positioning and supporting device for grinding cylinder of sand mill and sand mill

Abstract

The utility model provides a sand mill grinding cylinder positioning and supporting device and a sand mill, and relates to the technical field of sand mills. The utility model provides a positioning and supporting device for a grinding cylinder of a sand mill. The positioning and supporting device comprises the grinding cylinder, an outer cylinder body and a connecting assembly, wherein the outer cylinder body is sleeved outside the grinding cylinder; the connecting assembly comprises a first elastic sealing ring and a baffle ring, a first mounting groove is formed in the outer circumferential face of the grinding cylinder, a second mounting groove is formed in the inner circumferential face of the outer cylinder, the first mounting groove and the second mounting groove are spliced in the radial direction of the grinding cylinder to form an annular mounting cavity, and a third mounting groove is formed in the end of the outer cylinder. The side, away from the annular installation cavity, of the third installation groove is of an open structure, the side, facing the third installation groove, of the annular installation cavity is provided with an opening, the first elastic sealing ring is installed in the annular installation cavity, the baffle ring is installed in the third installation groove, and the side face of the baffle ring abuts against one side of the first elastic sealing ring. The utility model provides a sand mill grinding cylinder positioning and supporting device and a sand mill. The sand mill grinding cylinder positioning and supporting device is convenient to disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of sand mills, in particular to a positioning and supporting device for a grinding cylinder of a sand mill and a sand mill. Background Art

[0002] A sand mill, also known as a bead mill, is mainly used for wet grinding of chemical liquid products. A sand mill mainly consists of a machine body, a grinding cylinder, a sand grinding disc, grinding media, a motor, and a feeding pump. The feeding speed can be controlled by a feeding pump. The grinding media is used to mix and stir with the material to achieve the purpose of grinding. Among them, in order to heat or cool the grinding cylinder, an outer cylinder is generally sleeved outside it. Different temperature liquids can be injected into the sandwich space between the outer cylinder and the grinding cylinder, and the temperature of the grinding cylinder can be adjusted through the liquid.

[0003] In the prior art, the grinding cylinder and the outer cylinder are generally fixedly connected. In this connection method, it is extremely inconvenient to disassemble when the grinding cylinder needs to be repaired. Summary of the Utility Model

[0004] In order to solve at least one problem mentioned in the background art, the utility model provides a positioning and supporting device for a grinding cylinder of a sand mill and a sand mill, which is convenient to disassemble.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] In a first aspect, the utility model provides a positioning and supporting device for a grinding cylinder of a sand mill, including a grinding cylinder, an outer cylinder, a liquid inlet, a liquid outlet, and a connecting component. The outer cylinder is sleeved outside the grinding cylinder. A jacket cavity is formed between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the grinding cylinder. The liquid inlet and the liquid outlet are both opened on the outer peripheral surface of the outer cylinder, and both the liquid inlet and the liquid outlet communicate with the jacket cavity. The jacket cavity is used to accommodate the liquid input from the liquid inlet and flow out from the liquid outlet, so as to cool or heat the grinding cylinder through the liquid;

[0007] The connecting component includes a first elastic sealing ring and a retaining ring. The outer peripheral surface of the grinding cylinder has a first installation groove, and the inner peripheral surface of the outer cylinder has a second installation groove. The first installation groove and the second installation groove are spliced along the radial direction of the grinding cylinder to form an annular installation cavity. The end of the outer cylinder has a third installation groove, and the side of the third installation groove facing away from the annular installation cavity is an open structure. The annular installation cavity has an opening on the side facing the third installation groove. The annular installation cavity is configured to communicate with the third installation groove through the opening. The first elastic sealing ring is configured to be installed in the annular installation cavity from the opening, and the retaining ring is configured to be installed in the third installation groove from the open structure. The side surface of the retaining ring abuts against one side of the first elastic sealing ring.

[0008] As an optional implementation manner, the first elastic sealing ring is of a rectangular sealing ring structure.

[0009] As an alternative embodiment, the first elastic sealing ring includes two wedge-shaped sealing rings with a wedge-shaped cross-section, and the two wedge-shaped sealing rings are spliced along their inclined surfaces to form a rectangular sealing ring.

[0010] As an alternative embodiment, the width of the first elastic sealing ring along its own axis is greater than the width of the annular installation cavity along its own axis.

[0011] As an alternative embodiment, the connecting component further includes a second elastic sealing ring, and the second elastic sealing ring is arranged between the retaining ring and the outer peripheral surface of the grinding cylinder.

[0012] As an alternative embodiment, the connecting component further includes a third elastic sealing ring, and the third elastic sealing ring is arranged between the retaining ring and the side wall of the third installation groove.

[0013] As an alternative embodiment, the second elastic sealing ring and the third elastic sealing ring are O-ring seals.

[0014] As an alternative embodiment, the retaining ring is detachably connected to the outer cylinder through a threaded connector.

[0015] As an alternative embodiment, the depth of the first installation groove is 1 mm - 2 mm.

[0016] In a second aspect, the present utility model further provides a sand mill, including the sand mill grinding cylinder positioning and supporting device in any one of the first aspects.

[0017] The positioning and supporting device for the grinding cylinder of the sand mill provided by the utility model includes a grinding cylinder, an outer cylinder, a liquid inlet, a liquid outlet, and a connecting component. The outer cylinder is sleeved outside the grinding cylinder, and a jacket cavity is formed between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the grinding cylinder. The liquid inlet and the liquid outlet are both arranged on the outer peripheral surface of the outer cylinder, and both the liquid inlet and the liquid outlet are communicated with the jacket cavity. The jacket cavity is used to accommodate the liquid input from the liquid inlet and flow out from the liquid outlet, so as to cool or heat the grinding cylinder through the liquid. The connecting component includes a first elastic sealing ring and a retaining ring. The outer peripheral surface of the grinding cylinder has a first installation groove, and the inner peripheral surface of the outer cylinder has a second installation groove. The first installation groove and the second installation groove are spliced along the radial direction of the grinding cylinder to form an annular installation cavity. The end of the outer cylinder has a third installation groove, and the side of the third installation groove facing away from the annular installation cavity is an open structure. The annular installation cavity has an opening on the side facing the third installation groove. The annular installation cavity is configured to be communicated with the third installation groove through the opening. The first elastic sealing ring is configured to be installed in the annular installation cavity from the opening. The retaining ring is configured to be installed in the third installation groove from the open structure. The side surface of the retaining ring abuts against one side of the first elastic sealing ring. The positioning and supporting device for the grinding cylinder of the sand mill provided by the utility model can realize the connection and sealing between the grinding cylinder and the outer cylinder by arranging a first elastic sealing ring that is convenient for disassembly between the grinding cylinder and the outer cylinder. When the grinding cylinder needs to be repaired, the retaining ring can be removed from the open structure of the third installation groove first, and then the first elastic sealing ring can be axially taken out from the opening of the annular installation cavity. Finally, the outer cylinder can be axially pulled out from outside the grinding cylinder. After the grinding cylinder is repaired, the outer cylinder can be installed first, and then the first elastic sealing ring and the retaining ring can be installed in sequence. The disassembly and assembly process is extremely convenient. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic diagram of the overall structure of the positioning and supporting device for the grinding cylinder of the sand mill provided by the embodiment of the present invention;

[0020] Figure 2 is Figure 1 the sectional view of;

[0021] Figure 3 is Figure 2 the enlarged view at A in;

[0022] Figure 4This is a schematic structural diagram of the first key body in the positioning and supporting device for the grinding cylinder of a sand mill provided by an embodiment of the present utility model.

[0023] Explanation of reference numerals:

[0024] 100 - Positioning and supporting device for the grinding cylinder of a sand mill;

[0025] 110 - Grinding cylinder;

[0026] 120 - Outer cylinder;

[0027] 130 - Liquid inlet;

[0028] 140 - Liquid outlet;

[0029] 150 - Connection assembly;

[0030] 151 - First elastic sealing ring;

[0031] 152 - Retaining ring;

[0032] 153 - Second elastic sealing ring;

[0033] 154 - Third elastic sealing ring;

[0034] 155 - Threaded connector. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0036] In the application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present utility model and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0037] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present utility model can be understood according to specific situations.

[0038] In addition, the terms "installed", "set up", "provided with", "connected", and "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0039] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, components, or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, components, or parts. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0040] The sand mill mainly consists of a machine body, a grinding cylinder, a sand grinding disc, grinding media, a motor, and a feed pump. The feeding speed can be controlled by the feed pump. The grinding media is used to mix and stir with the material to achieve the purpose of grinding. Among them, in order to heat or cool the grinding cylinder, an outer cylinder is generally sleeved outside it. Different temperature liquids can be injected into the sandwich space between the outer cylinder and the grinding cylinder, and the temperature of the grinding cylinder can be adjusted through the liquid. In the prior art, the grinding cylinder and the outer cylinder are generally fixedly connected. In this connection method, it is extremely inconvenient to disassemble when the grinding cylinder needs to be repaired.

[0041] In view of this, the present utility model provides a positioning and supporting device 100 for the grinding cylinder of a sand mill. By arranging a first elastic sealing ring 151 that is convenient to disassemble between the grinding cylinder 110 and the outer cylinder 120, the connection and sealing between the grinding cylinder 110 and the outer cylinder 120 can be realized. When the grinding cylinder 110 needs to be repaired, the retaining ring 152 can be removed from the open structure of the third installation groove first, and then the first elastic sealing ring 151 can be axially taken out from the opening of the annular installation cavity. Finally, the outer cylinder 120 can be axially pulled out from outside the grinding cylinder 110; after the grinding cylinder 110 is repaired, the outer cylinder 120 can be installed first, and then the first elastic sealing ring 151 and the retaining ring 152 can be installed in sequence, and the disassembly and assembly process is extremely convenient.

[0042] Figure 1 It is a schematic diagram of the overall structure of the positioning and supporting device 100 for the grinding cylinder of the sand mill provided by the embodiment of the present utility model; Figure 2 is Figure 1 sectional view of; Figure 3 is Figure 2 the enlarged view of part A in; Figure 4 It is a schematic diagram of the structure of the first key body in the positioning and supporting device 100 for the grinding cylinder of the sand mill provided by the embodiment of the present utility model.

[0043] You can refer to Figures 1 to 4 The embodiment of the utility model provides a sand mill grinding cylinder positioning support device 100, including a grinding cylinder 110, an outer cylinder 120, a liquid inlet 130, a liquid outlet 140 and a connecting assembly 150. The outer cylinder 120 is sleeved on the outside of the grinding cylinder 110, and a jacket cavity is formed between the inner circumference of the outer cylinder 120 and the outer circumference of the grinding cylinder 110. The liquid inlet 130 and the liquid outlet 140 are both opened on the outer circumference of the outer cylinder 120, and the liquid inlet 130 and the liquid outlet 140 are both connected to the jacket cavity. The jacket cavity is used to accommodate liquid input from the liquid inlet 130 and flow out from the liquid outlet 140, so as to cool or heat the grinding cylinder 110 through the liquid. The connecting assembly 150 includes a first elastic sealing ring 151 and a retaining ring 152. The outer circumferential surface of the grinding cylinder 110 has a first mounting groove, and the inner circumferential surface of the outer cylinder 120 has a second mounting groove. The first mounting groove and the second mounting groove are spliced along the radial direction of the grinding cylinder 110 to form an annular mounting cavity. The end of the outer cylinder 120 has a third mounting groove. The side of the third mounting groove away from the annular mounting cavity is an open structure, and the side of the annular mounting cavity facing the third mounting groove has an opening. The annular mounting cavity is configured to be connected to the third mounting groove through the opening. The first elastic sealing ring 151 is configured to be installed in the annular mounting cavity from the opening, and the retaining ring 152 is configured to be installed in the third mounting groove from the open structure. The side of the retaining ring 152 abuts against one side of the first elastic sealing ring 151.

[0044] It can be understood that the first elastic sealing ring 151 can be interference-fitted with the annular mounting cavity, which can increase the sealing performance between the first elastic sealing ring 151 and the annular mounting cavity on the one hand, and increase the friction between the first elastic sealing ring 151 and the annular mounting cavity along the axial direction of the grinding cylinder 110 on the other hand, thereby further limiting the axial position of the grinding cylinder 110 and the outer cylinder 120. In addition, the first elastic sealing ring 151 can also be made of waterproof material, thereby further increasing the sealing performance between the first elastic sealing ring 151 and the annular mounting cavity, and specifically, the first elastic sealing ring 151 can be made of polytetrafluoroethylene material or polycarbonate material.

[0045] The positioning and supporting device 100 of the grinding cylinder of the utility model embodiment can realize the connection and sealing between the grinding cylinder 110 and the outer cylinder 120 by arranging a first elastic sealing ring 151 which is convenient to disassemble between the grinding cylinder 110 and the outer cylinder 120. When the grinding cylinder 110 needs to be repaired, the retaining ring 152 can be removed from the open structure of the third installation groove first, and then the first elastic sealing ring 151 can be axially taken out from the opening of the annular installation cavity. Finally, the outer cylinder 120 can be axially pulled out from the outside of the grinding cylinder 110; after the grinding cylinder 110 is repaired, the outer cylinder 120 can be installed first, and then the first elastic sealing ring 151 and the retaining ring 152 can be installed in sequence, and the disassembly and assembly process is extremely convenient.

[0046] In the above embodiment, the first elastic sealing ring 151 can be a rectangular sealing ring structure. In this way, the relative position of the outer cylinder 120 and the grinding cylinder 110 along the axial direction can be better restricted by the sealing ring.

[0047] In the above embodiment, the first elastic sealing ring 151 can include two wedge-shaped sealing rings with a wedge-shaped cross-section. The two wedge-shaped sealing rings are spliced along their inclined surfaces to form a rectangular sealing ring. When specifically installing the first elastic sealing ring 151, the inner wedge-shaped sealing ring can be installed first from the opening of the annular installation cavity, and then the tip of the outer wedge-shaped sealing ring can be pushed along the inclined surface of the installed wedge-shaped sealing ring, and then the outer wedge-shaped sealing ring can be tightly pressed from the outside by the retaining ring 152, so that the first elastic sealing ring 151 (two wedge-shaped sealing rings) is tightly filled in the annular installation cavity.

[0048] In the above embodiment, the width of the first elastic sealing ring 151 along its own axis can be greater than the width of the annular installation cavity along its own axis. In this way, the first elastic sealing ring 151 can be more tightly filled in the annular installation cavity, so as to improve the sealing performance and reliability. Specifically, when the inner wedge-shaped sealing ring and the outer wedge-shaped sealing ring are spliced, a part of the outer wedge-shaped sealing ring will extend out of the annular installation cavity. At this time, the retaining ring 152 can be tightly pressed against the part of the outer wedge-shaped sealing ring extending out of the annular installation cavity, so that the first elastic sealing ring 151 is more tightly installed in the annular installation cavity, improving the sealing performance. Among them, as Figure 4 shown, the cross-sectional shapes of the two wedge-shaped sealing rings can be specifically designed as right-angled trapezoids.

[0049] In the above embodiment, the connection component 150 can further include a second elastic sealing ring 153, and the second elastic sealing ring 153 is arranged between the retaining ring 152 and the outer peripheral surface of the grinding cylinder 110. The second elastic sealing ring 153 can seal the gap between the retaining ring 152 and the grinding cylinder 110 to prevent the liquid in the jacket cavity from leaking out.

[0050] In the above embodiments, the connecting component 150 may further include a third elastic sealing ring 154, which is disposed between the retaining ring 152 and the side wall of the third mounting groove. The third elastic sealing ring 154 can seal the gap between the retaining ring 152 and the outer cylinder 120, further preventing the liquid in the jacket cavity from leaking.

[0051] In the above embodiments, the second elastic sealing ring 153 and the third elastic sealing ring 154 may be O-ring seals. On the one hand, the O-ring seal has a low cost, which can save costs. On the other hand, the O-ring seal is convenient for disassembly and assembly.

[0052] In the above embodiments, the retaining ring 152 can be arranged in a manner that is convenient for disassembly. For example, the retaining ring 152 can be detachably connected to the outer cylinder 120 through a threaded connector 155, so as to facilitate the disassembly of the retaining ring 152. Specifically, as Figure 3 shown, the threaded connector 155 can use a bolt, and the bolt axially passes through the retaining ring 152 along the outer cylinder 120 and is threadedly connected to the outer cylinder 120. Of course, the threaded connector 155 can use other threaded connectors 155 such as screws and bolts. The end face of the retaining ring 152 can be flush with the end face of the outer cylinder 120, so that the structure of the connecting component 150 is more compact to save space. Further, the radial dimension of the retaining ring 152 can be designed to be larger than the radial dimension of the first elastic sealing ring 151, so that the retaining ring 152 can completely cover the side surface of the first elastic sealing ring 151 and limit the first elastic sealing ring 151 more reliably.

[0053] In the above embodiments, the depth of the first mounting groove can be 1 mm - 2 mm. It can be understood that if the depth of the first mounting groove is too shallow, it may be difficult for the first elastic sealing ring 151 to achieve axial positioning between the grinding cylinder 110 and the outer cylinder 120. If the depth of the first mounting groove is too deep, it may damage the structure of the grinding cylinder 110.

[0054] In addition, the embodiment of the utility model further provides a sand mill, including the sand mill grinding cylinder positioning support device 100 in any one of the above embodiments, the sand mill grinding cylinder positioning support device 100 includes a grinding cylinder 110, an outer cylinder 120, a liquid inlet 130, a liquid outlet 140 and a connecting assembly 150, the outer cylinder 120 is sleeved outside the grinding cylinder 110, and a jacket cavity is formed between the inner circumferential surface of the outer cylinder 120 and the outer circumferential surface of the grinding cylinder 110, the liquid inlet 130 and the liquid outlet 140 are both opened on the outer circumferential surface of the outer cylinder 120, and the liquid inlet 130 and the liquid outlet 140 are both connected to the jacket cavity, and the jacket cavity is used to accommodate liquid input from the liquid inlet 130 and flow out from the liquid outlet 140, so as to cool or heat the grinding cylinder 110 through the liquid. The connecting assembly 150 includes a first elastic sealing ring 151 and a retaining ring 152. The outer circumferential surface of the grinding cylinder 110 has a first mounting groove, and the inner circumferential surface of the outer cylinder body 120 has a second mounting groove. The first mounting groove and the second mounting groove are spliced along the radial direction of the grinding cylinder 110 to form an annular mounting cavity. The end of the outer cylinder body 120 has a third mounting groove. The side of the third mounting groove away from the annular mounting cavity is an open structure, and the side of the annular mounting cavity facing the third mounting groove has an opening. The annular mounting cavity is configured to be connected to the third mounting groove through the opening. The first elastic sealing ring 151 is configured to be installed in the annular mounting cavity from the opening, and the retaining ring 152 is configured to be installed in the third mounting groove from the open structure. The side of the retaining ring 152 abuts against one side of the first elastic sealing ring 151. When the grinding cylinder 110 needs to be repaired, the retaining ring 152 can be removed from the open structure of the third mounting groove first, and then the first elastic sealing ring 151 can be taken out axially from the opening of the annular mounting cavity. Finally, the outer cylinder 120 can be pulled out of the grinding cylinder 110 along the axial direction. After the grinding cylinder 110 is repaired, the outer cylinder 120 can be installed first, and then the first elastic sealing ring 151 and the retaining ring 152 can be installed in sequence. The disassembly and assembly process is extremely convenient, which improves the maintenance efficiency of the sand mill.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A positioning and supporting device for the grinding cylinder of a sand mill, characterized in that, It includes a grinding cylinder, an outer cylinder body, a liquid inlet, a liquid outlet and a connecting component. The outer cylinder body is sleeved outside the grinding cylinder. A jacket cavity is formed between the inner peripheral surface of the outer cylinder body and the outer peripheral surface of the grinding cylinder. The liquid inlet and the liquid outlet are both opened on the outer peripheral surface of the outer cylinder body, and both the liquid inlet and the liquid outlet communicate with the jacket cavity. The jacket cavity is used to accommodate the liquid input from the liquid inlet and flow out from the liquid outlet, so as to cool or heat the grinding cylinder through the liquid. The connecting component includes a first elastic sealing ring and a retaining ring. The outer peripheral surface of the grinding cylinder has a first installation groove, and the inner peripheral surface of the outer cylinder body has a second installation groove. The first installation groove and the second installation groove are spliced along the radial direction of the grinding cylinder to form an annular installation cavity. The end of the outer cylinder body has a third installation groove. The side of the third installation groove facing away from the annular installation cavity is an open structure. The annular installation cavity has an opening on the side facing the third installation groove. The annular installation cavity is configured to communicate with the third installation groove through the opening. The first elastic sealing ring is configured to be installed in the annular installation cavity from the opening, and the retaining ring is configured to be installed in the third installation groove from the open structure. The side surface of the retaining ring abuts against one side of the first elastic sealing ring.

2. The positioning and supporting device for the grinding cylinder of the sand mill according to claim 1, characterized in that, The first elastic sealing ring is of a rectangular sealing ring structure.

3. The positioning and supporting device for the grinding cylinder of the sand mill according to claim 2, wherein, The first elastic sealing ring includes two wedge-shaped sealing rings with a wedge-shaped cross-section. The two wedge-shaped sealing rings are spliced along their inclined surfaces to form the rectangular sealing ring.

4. The positioning and supporting device for the grinding cylinder of the sand mill according to claim 3, wherein, The width of the first elastic sealing ring along its own axis is greater than the width of the annular installation cavity along its own axis.

5. The positioning and supporting device for the grinding cylinder of the sand mill according to claim 4, characterized in that, The connecting component further includes a second elastic sealing ring, and the second elastic sealing ring is arranged between the retaining ring and the outer peripheral surface of the grinding cylinder.

6. The positioning and supporting device for the grinding cylinder of the sand mill according to claim 5, wherein, The connecting component further includes a third elastic sealing ring, and the third elastic sealing ring is arranged between the retaining ring and the side wall of the third installation groove.

7. The positioning and supporting device for the grinding cylinder of the sand mill according to claim 6, characterized in that, The second elastic sealing ring and the third elastic sealing ring are O-shaped sealing rings.

8. The positioning and supporting device for the grinding cylinder of the sand mill according to any one of claims 1-7, characterized in that, The retaining ring is detachably connected to the outer cylinder body through a threaded connector.

9. The positioning and supporting device for the grinding cylinder of a sand mill according to any one of claims 1-7, characterized in that, The depth of the first installation groove is 1 mm - 2 mm.

10. A sand mill, characterized in that, It includes the positioning and supporting device for the grinding cylinder of the sand mill described in any one of claims 1 - 9.

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