Grinding cylinder and grinding machine

Abstract

On one hand, an embodiment of the present application provides a grinding cylinder, the grinding cylinder includes an inner cylinder, an outer cylinder and a flow guide, the inner cylinder forms a grinding cavity for accommodating materials and grinding media, and the outer wall of the inner cylinder has a blind hole; the outer cylinder is arranged outside the inner cylinder, and a first cavity is formed between the inner cylinder and the outer cylinder, and the first cavity is isolated from the grinding cavity; the flow guide is provided with a flow guide channel, the flow guide channel is isolated from the first cavity, one end of the flow guide channel is connected to the blind hole, and when the blind hole on the inner cylinder is worn through, the material and / or the grinding media flows out of the grinding cavity through the flow guide channel. On the other hand, an embodiment of the present application also provides a grinder, the grinder includes the grinding cylinder described above.

Description

Technical Field

[0001] The present application relates to the technical field of material grinding, and in particular to a grinding cylinder and a grinding machine. Background Art

[0002] Natural asphalt is also called ground asphalt or mineral asphalt. The light components are evaporated and then polymerized by oxygen in the air under sunlight to become mineral asphalt. It is mainly composed of asphaltene, resin, colloid, etc., as well as a small amount of other mineral impurities such as metals and non-metals. The raw natural asphalt ore is crushed and ground, and then the processing fluid is added to the asphalt powder obtained by grinding to form a natural asphalt mixed slurry.

[0003] The existing grinder for grinding natural asphalt mixed slurry includes an inner cylinder and an outer cylinder. The inner cylinder includes a grinding chamber, and the grinding chamber contains materials and grinding media, such as grinding balls. The outer cylinder is arranged on the outside of the inner cylinder. An oil guide chamber is formed between the outer cylinder and the inner cylinder. Heat transfer oil flows in the oil guide chamber. During the grinding process, the grinding balls continuously wear the inner cylinder, and the grinding balls are likely to wear through the inner cylinder. At this time, the natural asphalt mixed slurry and the grinding balls may enter the oil guide chamber through the wear-through part of the inner cylinder, contaminating the heat transfer oil. The heat transfer oil may also enter the inner cylinder through the wear-through part of the inner cylinder, contaminating the natural asphalt mixed slurry. Summary of the invention

[0004] In view of this, the embodiments of the present application hope to provide a grinding cylinder and a grinder to solve the technical problems in the prior art that the grinding balls are prone to wear through the inner cylinder of the grinder, the natural asphalt mixed slurry and the grinding balls may enter the oil guide cavity through the wear-through part of the inner cylinder and contaminate the heat transfer oil, and the heat transfer oil may also enter the inner cylinder through the wear-through part of the inner cylinder and contaminate the natural asphalt mixed slurry.

[0005] To achieve the above purpose, the technical solution of this application is implemented as follows:

[0006] In one aspect, an embodiment of the present application provides a grinding cylinder, wherein the grinding cylinder comprises:

[0007] An inner cylinder, wherein the inner cylinder is formed with a grinding chamber for accommodating materials and grinding media, and an outer wall of the inner cylinder is provided with a blind hole;

[0008] An outer cylinder, wherein the outer cylinder is spaced outside the inner cylinder, a first cavity is formed between the inner cylinder and the outer cylinder, and the first cavity is isolated from the grinding cavity; and

[0009] A flow guide member, wherein the flow guide member is provided with a flow guide channel, the flow guide channel is isolated from the first cavity, one end of the flow guide channel is connected to the blind hole, and when the blind hole on the inner cylinder is worn through, the material and / or the grinding medium flows out of the grinding cavity through the flow guide channel.

[0010] Further, the guide member is a guide groove, and the guide groove is arranged on the outer wall of the inner tube along the axial direction of the inner tube, and the guide channel is formed between the guide groove and the outer wall of the inner tube.

[0011] Furthermore, the flow guide member is a flow guide tube, and the flow guide channel is formed in the flow guide tube.

[0012] Further, the grinding cylinder includes a middle cylinder, the inner wall of the middle cylinder abuts against the outer wall of the inner cylinder, the middle cylinder has a flow hole at a position corresponding to the blind hole, the first cavity is formed between the middle cylinder and the outer cylinder, and one end of the guide channel is connected to the flow hole.

[0013] Furthermore, one end of the flow guide is accommodated in the flow hole, the flow guide is welded to the outer wall of the middle tube, and the other end of the flow guide is welded to the outer wall of the outer tube.

[0014] Furthermore, the blind hole is located at the bottom of the inner cylinder.

[0015] Furthermore, the minimum wall thickness of the inner tube is 2 to 9 times the maximum depth of the blind hole.

[0016] Furthermore, the grinding cylinder includes a plurality of wear-resistant liners covering the inner wall of the inner cylinder.

[0017] Further, the wear-resistant lining includes a plurality of protrusions facing the interior of the inner barrel;

[0018] The plurality of protrusions are distributed in an array or staggered manner; and / or, the heights of the plurality of protrusions are equal or different.

[0019] Another aspect of an embodiment of the present application provides a grinding machine, which includes the grinding cylinder described in any one of the above items.

[0020] During the operation of the grinding cylinder, the material and the grinding medium continuously wear the inner wall of the inner cylinder. In the grinding cylinder provided in the embodiment of the present application, since the outer wall of the inner cylinder has a blind hole, the wall thickness of the portion of the inner cylinder where the blind hole is located is relatively thin, and the portion of the inner cylinder where the blind hole is located is worn through first, and the material and / or the grinding medium enters the guide channel through the blind hole and flows out of the grinding chamber through the guide channel. Therefore, when the material and / or the grinding medium is detected in the guide channel, it means that the portion of the inner cylinder where the blind hole is located has been worn through. At this time, the grinding cylinder can be replaced or repaired to prevent the grinding medium from further wearing the inner cylinder, thereby preventing the material and / or the grinding medium from entering the first cavity, and also preventing the substance in the first cavity from entering the grinding chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the grinding machine in the embodiment of the present application;

[0022] Figure 2 This is a schematic diagram of the structure of a grinding cylinder in an embodiment of the present application;

[0023] Figure 3 This is a schematic diagram of the structure of another grinding cylinder in an embodiment of the present application;

[0024] Figure 4 This is a schematic diagram of the structure of another grinding cylinder in the embodiment of the present application;

[0025] Figure 5 This is a schematic diagram of the structure of another grinding cylinder in an embodiment of the present application.

[0026] Description of Reference Numerals

[0027] Grinding cylinder 100; first cavity 100a; inner cylinder 10; grinding cavity 10a; blind hole 10b; outer cylinder 20; flow guide 30; flow guide groove 31; flow guide pipe 32; middle cylinder 40; flow hole 40a; wear-resistant lining 50. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0029] In the description of the present application, the orientations or positional relationships of "upper", "lower", "top" and "bottom" are based on the normal use state of the grinder, such as the orientations or positional relationships shown in the accompanying drawings. It should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] See also Figure 1-Figure 5 In one aspect, an embodiment of the present application provides a grinding cylinder 100, which includes an inner cylinder 10, an outer cylinder 20, and a flow guide 30. The inner cylinder 10 is formed with a grinding chamber 10a for accommodating materials and grinding media, and the outer wall of the inner cylinder 10 has a blind hole 10b. The outer cylinder 20 is arranged outside the inner cylinder 10, and a first cavity 100a is formed between the inner cylinder 10 and the outer cylinder 20, and the first cavity 100a is isolated from the grinding chamber 10a. The flow guide 30 is provided with a flow guide channel (not shown in the figure), which is isolated from the first cavity 100a, and one end of the flow guide channel is connected to the blind hole 10b. When the part of the inner cylinder 10 where the blind hole 10b is located is worn through, the material and / or the grinding medium flows out of the grinding chamber 10a through the flow guide channel.

[0031] During the operation of the grinding cylinder 100, the material and the grinding medium continuously wear the inner wall of the inner cylinder 10. Since the outer wall of the inner cylinder 10 has a blind hole 10b, the wall thickness of the portion of the inner cylinder 10 where the blind hole 10b is located is relatively thin, and the portion of the inner cylinder 10 where the blind hole 10b is located is worn through first, and the material and / or the grinding medium enters the guide channel through the blind hole 10b and flows out of the grinding chamber 10a through the guide channel. Therefore, when the material and / or the grinding medium is detected in the guide channel, it means that the portion of the inner cylinder 10 where the blind hole 10b is located has been worn through. At this time, the grinding cylinder 100 can be replaced or repaired to prevent the grinding medium from further wearing the inner cylinder 10, thereby preventing the material and / or the grinding medium from entering the first cavity 100a, and also preventing the material in the first cavity 100a from entering the grinding chamber 10a.

[0032] In one embodiment of this application, please refer to Figure 2 The guide member 30 is a guide groove 31, which is arranged on the outer wall of the inner cylinder 10 along the axial direction of the inner cylinder 10, and a guide channel is formed between the guide groove 31 and the outer wall of the inner cylinder 10. In this design, a guide channel is formed between the guide groove 31 and the outer wall of the inner cylinder 10. When the portion of the inner cylinder 10 where the blind hole 10b is located is worn through, the material and / or grinding medium flows out of the grinding chamber 10a through the guide channel.

[0033] In a specific embodiment, the guide groove 31 is connected to the blind hole 10b, and the guide groove 31 is arranged on the outer wall of the inner cylinder 10 along the axial direction of the inner cylinder 10. One end of the guide groove 31 penetrates the outer cylinder 20 and extends to the outside of the grinding cylinder 100. Since the guide channel is isolated from the first cavity 100, the connection between the guide groove 31 and the outer wall of the inner cylinder 10 can be sealed, and a guide channel is formed between the guide groove 31 and the outer wall of the inner cylinder 10. When the part where the blind hole 10b is located on the inner cylinder 10 is worn through, the material and / or grinding medium flows out of the grinding chamber 10a along the guide channel through the blind hole 10b. For example, the outer cylinder 20 includes a cover plate, and one end of the guide groove 31 can penetrate the cover plate and extend to the outside of the grinding cylinder 100. It can be understood that the connection between the guide groove 31 and the blind hole 10b and the connection with the outer cylinder 20 also needs to be sealed. Specifically, the sealed connection can be welding.

[0034] Understandably, see Figure 2 One, two or more blind holes 10 b may be provided, and one, two or more blind holes 10 b are all connected to the guide groove 31 .

[0035] In one embodiment of this application, please refer to Figure 3 The flow guide member 30 is a flow guide tube 32, and the flow guide channel is formed in the flow guide tube 32. The flow guide tube 32 has a simple structure, is easy to manufacture, and saves steps.

[0036] In a specific embodiment, the diameter of the connection between the guide tube 32 and the blind hole 10b is smaller than the maximum diameter of the blind hole 10b, then one end of the guide tube 32 is arranged in the blind hole 10b, and the other end of the guide tube 32 extends to the outside of the grinding cylinder 100 along the axial or radial direction of the inner cylinder 10 through the outer cylinder 20, and when the part of the inner cylinder 10 where the blind hole 10b is located is worn through, the material and / or grinding medium flows out of the grinding chamber 10a along the guide channel through the blind hole 10b. In another specific embodiment, the diameter of the connection between the guide tube 32 and the blind hole 10b is greater than or equal to the maximum diameter of the blind hole 10b, one end of the guide tube 32 is arranged outside the blind hole 10b, and the connection between the guide tube 32 and the outer wall of the inner cylinder 10 is sealed. It can be understood that, since the guide channel is isolated from the first cavity 100, not only the connection between the guide tube 32 and the blind hole 10b needs to be sealed, but also the connection between the guide tube 32 and the outer cylinder 20 needs to be sealed. Specifically, the sealed connection can be welding.

[0037] Understandably, see Figure 3 One, two or more blind holes 10 b may be provided. In this case, the number of the flow guide tubes 32 is consistent with the number of the blind holes 10 b . In other words, each blind hole 10 b corresponds to one flow guide tube 32 .

[0038] In one embodiment of this application, please refer to Figure 4 and Figure 5 The grinding cylinder 100 includes a middle cylinder 40, the inner wall of the middle cylinder 40 abuts against the outer wall of the inner cylinder 10, the middle cylinder 40 has a flow hole 40a at a position corresponding to the blind hole 10a, a first cavity 100a is formed between the middle cylinder 40 and the outer cylinder 20, and one end of the flow guide channel is connected to the flow hole 40a. The first cavity 100a is formed between the middle cylinder 40 and the outer cylinder 20, and the middle cylinder 40 isolates the inner cylinder 10 from the outer cylinder 20, further preventing the material and / or grinding medium from entering the first cavity 100a.

[0039] In a specific embodiment, see Figure 4 The guide member 30 is a guide groove 31, which is connected to the flow hole 40a. The guide groove 31 is arranged on the outer wall of the middle cylinder 40 along the axial direction of the middle cylinder 40. One end of the guide groove 31 passes through the outer cylinder 20 and extends to the outside of the grinding cylinder 100. Since the guide channel is isolated from the first cavity 100a, the connection between the guide groove 31 and the outer wall of the middle cylinder 40 can be sealed. A guide channel is formed between the guide groove 31 and the outer wall of the middle cylinder 40. When the part where the blind hole 10b on the inner cylinder 10 is located is worn through, the material and / or grinding medium flows out of the grinding chamber 10a along the guide channel through the blind hole 10b and the flow hole 40a. It can be understood that the connection between the guide groove 31 and the flow hole 40a, the connection between the guide groove 31 and the outer wall of the middle cylinder 40, and the connection between the guide groove 31 and the outer cylinder 20 also need to be sealed. Specifically, the sealed connection can be welding.

[0040] It can be understood that one, two or more flow holes 40 a can be provided corresponding to the blind hole 10 b , and one, two or more flow holes 40 a are all connected to the guide groove 31 .

[0041] In order to further simplify the structure and manufacturing process of the guide member 30, in one embodiment of the present application, see Figure 5 One end of the flow guide 30 is accommodated in the flow hole 40 a , the flow guide 30 is welded to the outer wall of the middle cylinder 40 , and the other end of the flow guide 30 is welded to the outer wall of the outer cylinder 20 .

[0042] In a specific embodiment, the flow guide 30 is a flow guide tube 32, and the flow guide channel is formed in the flow guide tube 32. One end of the flow guide tube 32 is accommodated in the flow hole 40a, the flow guide tube 32 is connected to the flow hole 40a, and the other end of the flow guide tube 32 extends to the outside of the grinding cylinder 100 through the outer cylinder 20 along the axial direction or radial direction of the middle cylinder 40, and the flow guide 30 is welded to the outer wall of the middle cylinder 40, and the other end of the flow guide 30 is welded to the outer wall of the outer cylinder 20. When the part where the blind hole 10b on the inner cylinder 10 is located is worn through, the material and / or grinding medium flows out of the grinding chamber 10a through the blind hole 10b and the flow hole 40a along the flow guide channel.

[0043] In another specific embodiment, if the diameter of the connection between the flow guide tube 32 and the blind hole 10b is greater than or equal to the maximum diameter of the blind hole 10b, one end of the flow guide tube 32 is disposed outside the flow hole 40a, and the connection between the flow guide tube 32 and the outer wall of the middle cylinder 40 is sealed. It can be understood that since the flow guide channel and the first cavity 100 are isolated from each other, not only the connection between the flow guide tube 32 and the flow hole 40a needs to be sealed, but also the connection between the flow guide tube 32 and the outer cylinder 20 needs to be sealed. Specifically, the sealed connection can be welding.

[0044] It is understandable that one, two or more flow holes 40a can be provided corresponding to the blind holes 10b. In this case, the number of flow guide tubes 32 is consistent with the number of flow holes 40a. In other words, each flow hole 40a corresponds to one flow guide tube 32.

[0045] In one embodiment of this application, please refer to Figure 2-Figure 5 , the blind hole 10b is located at the bottom of the inner cylinder 10. Under the action of gravity, more grinding media are easily deposited at the bottom of the inner cylinder 10, that is, the amount of grinding media at the bottom of the inner cylinder 10 is greater than the density of other positions of the inner cylinder 10. Therefore, the bottom of the inner cylinder 10 is more likely to be worn out than other parts of the inner cylinder 10. The blind hole 10b is arranged at the bottom of the inner cylinder 10, which makes it easier to find the wear of the inner cylinder 10 as early as possible, and to replace or repair the grinding cylinder 100 in time.

[0046] In one embodiment of this application, please refer to Figure 2-Figure 5The minimum wall thickness of the inner cylinder 10 is 2 to 9 times the maximum depth of the blind hole 10b. The greater the depth of the blind hole 10b, the closer the bottom of the blind hole 10b is to the inner wall of the inner cylinder 10, and the easier it is for the grinding medium to wear through the part of the inner cylinder 10 where the blind hole 10b is located. If the depth of the blind hole 10b is too large, the wall thickness of the blind hole 10b on the inner cylinder 10 is too small. When the blind hole 10b on the inner cylinder 10 is worn through, the actual wear of the inner cylinder 10 is not serious. In other words, the remaining wall thickness of the inner cylinder 10 after wear is still within the standard requirements of the use specification. At this time, replacing or repairing the grinding cylinder 100 is likely to cause excessive waste and high cost; if the depth of the blind hole 10b is too small, the thickness of the blind hole 10b on the inner cylinder 10 is too large. When the blind hole 10b on the inner cylinder 10 is worn through, the actual wear of the inner cylinder 10 is already serious. In other words, the remaining wall thickness of the inner cylinder 10 after wear does not meet the standard requirements of the use, and the risk of the inner cylinder 10 being worn through is relatively high. Therefore, when the minimum wall thickness of the inner cylinder 10 is 2 to 9 times the maximum depth of the blind hole 10b, the wear of the inner cylinder 10 can be judged in time, the risk of the inner cylinder 10 being worn through is avoided, excessive waste can be avoided, and the cost can be reasonably controlled.

[0047] In one embodiment of this application, please refer to Figure 2-Figure 5 The grinding cylinder 100 includes a plurality of wear-resistant liners 50 covering the inner wall of the inner cylinder 10. The wear-resistant liners 50 are used to increase the wear resistance of the inner cylinder 10 and further prevent the inner cylinder 10 from being worn through.

[0048] In one embodiment of this application, please refer to Figure 2-Figure 5 The wear-resistant lining 50 includes a plurality of protrusions (not shown) facing the inside of the inner barrel 10. On the one hand, the protrusions effectively increase the surface area of ​​the wear-resistant lining 50 in contact with the material and the grinding medium, so that the wear-resistant lining 50 can be used for a longer time. On the other hand, the protrusions can increase the surface area of ​​the wear-resistant lining 50 over a large area without occupying too much space in the inner barrel 10. In addition, the protrusions increase the roughness of the surface of the wear-resistant lining 50 close to the inside of the inner barrel 10, increase the friction between the wear-resistant lining 50 and the material, and grind the material to the required particle size more quickly.

[0049] In order to increase the number of protrusions per unit area of ​​the wear-resistant lining 50, in one embodiment of the present application, a plurality of protrusions are distributed in an array or staggered manner.

[0050] In one embodiment of the present application, the heights of the plurality of protrusions are equal or different. The protrusions of different heights form a height difference, which increases the friction between the materials, between the materials and the wear-resistant medium, and between the materials and the wear-resistant lining, further allowing the materials to be ground to the required particle size more quickly.

[0051] Another aspect of the present application provides a grinding machine, see Figure 1The grinding machine includes the grinding cylinder 100 in any one of the above embodiments.

[0052] The grinding cylinder and the grinding machine provided in the embodiments of the present application are particularly suitable for a horizontal grinding machine, that is, a grinding machine in which the axial direction of the grinding cylinder is horizontal.

[0053] The grinding medium in the embodiment of the present application can be one or more of a sphere, a frustum, a cylindrical ball, a short round rod, and the material used for the grinding medium can be cast iron, alloy, alumina, silicon carbide, ceramics, etc.

[0054] It can be understood that when the grinding cylinder and grinder provided in the embodiment of the present application are used to grind natural asphalt mixed slurry or other materials that need to be heated, the grinding cylinder needs to be heated so that the natural asphalt mixed slurry can remain a liquid with good fluidity at a certain temperature. Therefore, the first cavity 100a in the grinding cylinder and grinder provided in the embodiment of the present application can be used to accommodate high-temperature heat-conductive materials, and the heat-conductive materials are configured to transfer heat to the inner cylinder 10. The high-temperature heat-conductive materials transfer heat to the natural asphalt mixed slurry or other materials that need to be heated to keep them in liquid form.

[0055] It should be noted that the heat-conducting material is a high-temperature liquid that can transfer heat to the material in the grinding chamber, such as heat-conducting oil, or other liquids used for heat conduction. It is only necessary that the high-temperature liquid in the first cavity 100a can transfer heat to the material in the grinding chamber to maintain the temperature of the material.

[0056] It is understandable that the grinder provided in the embodiment of the present application can also be used for other materials that need to be ground, including other materials that need to be heated and ground.

[0057] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A grinding cylinder, characterized in that: The grinding cylinder comprises: An inner cylinder, wherein the inner cylinder is formed with a grinding chamber for accommodating materials and grinding media, and an outer wall of the inner cylinder is provided with a blind hole; an outer cylinder, the outer cylinder being spaced outside the inner cylinder, a first cavity being formed between the inner cylinder and the outer cylinder, and the first cavity being isolated from the grinding cavity; and A flow guide member, wherein the flow guide member is provided with a flow guide channel, the flow guide channel is isolated from the first cavity, one end of the flow guide channel is connected to the blind hole, the material and the grinding medium continuously wear the inner wall of the inner cylinder, the portion of the inner cylinder where the blind hole is located is worn through first, and when the portion of the inner cylinder where the blind hole is located is worn through, the material and / or the grinding medium flows out of the grinding cavity through the flow guide channel; the minimum wall thickness of the inner cylinder is 2 to 9 times the maximum depth of the blind hole; the grinding cylinder includes a plurality of wear-resistant linings covering the inner wall of the inner cylinder.

2. The grinding cylinder according to claim 1, characterized in that The flow guide member is a flow guide groove, which is arranged on the outer wall of the inner tube along the axial direction of the inner tube, and the flow guide channel is formed between the flow guide groove and the outer wall of the inner tube.

3. The grinding cylinder according to claim 1, characterized in that The flow guide member is a flow guide tube, and the flow guide channel is formed in the flow guide tube.

4. The grinding cylinder according to claim 1, characterized in that The grinding cylinder includes a middle cylinder, the inner wall of the middle cylinder abuts against the outer wall of the inner cylinder, the middle cylinder has a flow hole at a position corresponding to the blind hole, the first cavity is formed between the middle cylinder and the outer cylinder, and one end of the guide channel is connected to the flow hole.

5. The grinding cylinder according to claim 4, characterized in that One end of the flow guide is accommodated in the flow hole, the flow guide is welded to the outer wall of the middle cylinder, and the other end of the flow guide is welded to the outer wall of the outer cylinder.

6. The grinding cylinder according to any one of claims 1 to 5, characterized in that: The blind hole is located at the bottom of the inner cylinder.

7. The grinding cylinder according to claim 1, characterized in that The wear-resistant lining includes a plurality of protrusions facing the interior of the inner barrel; The plurality of protrusions are distributed in an array or in a staggered manner; and / or the heights of the plurality of protrusions are equal or different.

8. A grinding machine, characterized in that: The grinding machine comprises the grinding cylinder according to any one of claims 1 to 7.

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