Grinding mill and discharge device

Abstract

This application provides a grinding mill and a discharge device. The grinding mill includes a grinding cylinder and a discharge device. The discharge device includes a housing and a screen. The housing has an installation cavity and a material outlet communicating with the installation cavity. The screen is disposed in the installation cavity and has a filter cavity, screen holes communicating with the filter cavity, and a material inlet communicating with the filter cavity. The material outlet is located on the top side of the material inlet along the height direction of the grinding mill. In the discharge device and grinding mill of this application embodiment, the material in the discharge device will flow upwards, thereby reducing the probability of the grinding media in the grinding cavity entering the discharge device and contacting the screen, thus increasing the service life of the screen. Furthermore, in the event of screen damage, after the grinding mill stops, the material in the discharge device will flow back into the grinding cavity under gravity, thereby significantly reducing maintenance difficulty and downtime during maintenance.

Description

Technical Field

[0001] The embodiments of this application relate to the field of grinding and processing equipment, and more particularly to a grinding machine and a discharge device. Background Technology

[0002] Grinding mills are used to grind materials to achieve the desired size. To achieve better grinding results, grinding media are usually added to the grinding cylinder of the grinding mill.

[0003] In related technologies, the grinding cylinder is usually placed horizontally and the material is discharged from the end, making maintenance extremely inconvenient after the discharge device is damaged. Utility Model Content

[0004] In view of this, the present application aims to provide a grinding mill and a discharge device that facilitate the maintenance of the discharge device.

[0005] An embodiment of this application provides a grinding machine, the grinding machine comprising: a grinding cylinder having a grinding chamber and a discharge port communicating with the grinding chamber, the axial direction of the grinding cylinder intersecting the height direction of the grinding machine; and a discharge device comprising a housing and a screen, the housing having an installation cavity and a material outlet communicating with the installation cavity, the screen being disposed within the installation cavity, the screen having a filtering cavity, screen holes communicating with the filtering cavity, and a material inlet communicating with the filtering cavity, the screen holes communicating with the filtering cavity and the installation cavity, wherein, along the height direction of the grinding machine, the material outlet is located on the top side of the material inlet.

[0006] In some embodiments, the discharge device includes: a first stop mechanism disposed on the bottom side of the screen and connected to the discharge port and the material inlet, the first stop mechanism being used to prevent the grinding media in the material from entering the filter chamber.

[0007] In some embodiments, the first stop mechanism includes a filter plate, the thickness direction of which is parallel to the height direction, and the filter plate has a material flow channel that extends through the filter plate along the height direction.

[0008] In some embodiments, the flow area of ​​the material channel increases along the direction close to the screen; and / or at least a portion of the filter plate is disposed within the discharge port, and along the height direction, the side surface of the filter plate facing away from the screen does not extend beyond the inner surface of the grinding cylinder; and / or the filter plate includes an annular body and a plurality of side-by-side and spaced-apart baffles, the opposite ends of the baffles extending in the direction of extension being connected to the annular body, and the material channel is formed between adjacent baffles.

[0009] In some embodiments, the discharge device further includes a second stop mechanism disposed between the screen and the first stop mechanism, the second stop mechanism being connected to the first stop mechanism and the material inlet.

[0010] In some embodiments, the second stop mechanism includes a cylindrical body and a guide wall disposed within the cylindrical body. The axial direction of the cylindrical body is parallel to the height direction. Along the height direction, an opening is formed at one end of the cylindrical body away from the screen. The first stop mechanism covers the opening. One end of the guide wall extends along the periphery of the material inlet, and the other end is spaced apart from the first stop mechanism. A flow cavity is formed between the guide wall and the screen. A buffer cavity is formed between the guide wall, the cylindrical body, and the first stop mechanism. The buffer cavity communicates with the flow cavity.

[0011] In some embodiments, the guide wall extends along the periphery of the material inlet to form an annular closed structure, and along the height direction, the end of the guide wall away from the screen forms a connecting hole connecting the buffer cavity and the flow cavity; and / or along the direction away from the first stop mechanism, the guide wall extends obliquely toward the circumferential wall of the cylindrical body; and / or the cylindrical body forms an observation area.

[0012] In some embodiments, the discharge device further includes a guide for applying centrifugal force to the material.

[0013] In some embodiments, the screen is formed as a cylindrical structure with the axial direction parallel to the height direction, and the guide includes a drive unit and a rotor, the drive unit being used to drive the rotor to rotate about the central axis of the screen within the mounting cavity.

[0014] In some embodiments, the rotor includes a first rotor having a plurality of disturbance arms distributed circumferentially along the screen and extending along the height direction; and / or the rotor includes a second rotor disposed on one side of the screen along the height direction, the second rotor having a plurality of blades extending radially along the screen.

[0015] In some embodiments, the grinding machine includes a grinding element disposed within the grinding chamber, the grinding element being configured to rotate unidirectionally about the central axis of the grinding cylinder, wherein, along the rotation direction of the grinding element, the geometric center of the discharge port is located downstream of a reference plane, the reference plane being a plane passing through the central axis of the grinding cylinder and parallel to the height direction of the grinding machine.

[0016] The embodiments of this application also provide a discharge device, which is the discharge device of the grinder described in any of the above embodiments. In the discharge device and grinder of the embodiments of this application, the material in the discharge device will flow upward, thereby reducing the probability that the grinding media in the grinding chamber will enter the discharge device and come into contact with the screen, thus improving the service life of the screen. Furthermore, in the event of screen damage, after the grinder stops, the material in the discharge device will flow back into the grinding chamber under the action of gravity, thereby significantly reducing the difficulty of maintenance and the downtime during maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the grinding machine according to an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the discharge device according to an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the structure of the screen according to an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the filter plate according to an embodiment of this application;

[0021] Figure 5 for Figure 2 A magnified view of part A in the middle;

[0022] Figure 6 This is a schematic diagram of the structure of the second stop mechanism according to an embodiment of this application;

[0023] Figure 7 This is a schematic diagram of the structure of the first rotor according to an embodiment of this application;

[0024] Figure 8 This is a schematic diagram showing the positional relationship between the discharge port, grinding cylinder, and discharge device in an embodiment of this application.

[0025] Explanation of reference numerals in the attached figures

[0026] 100. Discharge device; 10. Shell; 10a. Mounting cavity; 10b. Material outlet; 20. Screen; 20a. Filter cavity; 20b. Material inlet; 21. Circumferential wall; 22. Top wall; 30. First stop mechanism; 31. Filter plate; 31a. Material flow channel; 311. Annular body; 312. Rib; 312a. First guide surface; 312b. Second guide surface; 40. Second stop mechanism; 40a. Buffer cavity; 40b. Flow cavity; 41. Cylindrical body; 41a. Observation area; 411. Cylindrical wall; 412. Barrier wall; 42. Guide wall; 50. Guide component; 51. Drive unit; 511. Motor; 512. Rotating shaft; 52. Rotor; 521. First rotor; 5211. Disturbance arm; 5212. Adapter plate; 5213. Reinforcing ring; 522. Second rotor; 5221. Blade; 60. Connecting cylinder; 200. Grinding cylinder; 200a. Grinding chamber; 200b. Discharge port; 200c. Feed port; 200d. Grinding media inlet; 200e. Material discharge port; 200f. Grinding media discharge port; 300. Grinding component; 301. Grinding disc. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0028] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0029] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0030] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0031] In the description of this application, "height direction", "axial direction of the grinding cylinder", orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. The "height direction" is the direction indicated by arrow L1 in the drawings, and the "axial direction of the grinding cylinder" is the direction indicated by arrow L2 in the drawings. It should be understood that these orientation terms are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0032] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this 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, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0033] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0034] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0035] An embodiment of this application provides a grinding mill. Here, the grinding mill can be any device provided in the related art that grinds materials using grinding media. Here, the specific type of material is not limited, and the specific type of grinding media can be determined according to the type of material and the target particle size of the material.

[0036] In some specific embodiments, the grinding mill is used to grind asphalt. In this embodiment, the grinding media can be specifically set as a spherical structure. The material of the grinding media includes, but is not limited to, metals (e.g., high-chromium steel balls, stainless steel), cemented carbide (e.g., tungsten carbide), ceramics (e.g., zirconium oxide, alumina), etc.

[0037] Furthermore, since asphalt is solid at room temperature, in this embodiment, the grinding mill includes a heating system for heating the material (asphalt) so that it can flow within the grinding mill.

[0038] Reference Figure 1 The grinding machine of this application embodiment includes a discharge device 100 and a grinding cylinder 200 having a grinding chamber 200a. The axial direction of the grinding cylinder 200 is perpendicular to the height direction of the grinding machine, and the grinding cylinder 200 has a discharge port 200b communicating with the grinding chamber 200a.

[0039] Here, the height direction of the grinder is the direction of gravity during actual use, and the axial direction of the grinding cylinder 200 is specifically the horizontal direction during actual use.

[0040] The grinding cylinder 200 is specifically a cylindrical structure, and the grinding chamber 200a is specifically a cylindrical chamber.

[0041] In some embodiments, specifically, a discharge port 200b is formed on the top side of the grinding cylinder 200. The discharge port 200b is formed on the circumferential wall of the grinding cylinder 200, and at least a portion of the discharge port 200b is located above a plane that passes through the central axis of the grinding cylinder 200 (grinding chamber 200a) and is perpendicular to the height direction. Of course, in other embodiments, the discharge port 200b can also be formed at any suitable location, such as the axial end face or radial side face of the grinding cylinder 200.

[0042] The discharge port 200b is connected to the grinding chamber 200a, which specifically means that the material inside the grinding chamber 200a can reach the outside of the grinding chamber 200a through the discharge port 200b.

[0043] In addition to the discharge port 200b, the grinding cylinder 200 also has a feed port 200c and a grinding media inlet 200d communicating with the grinding chamber 200a. The feed port 200c is used to feed materials into the grinding chamber 200a, and the grinding media inlet 200d is used to feed grinding media into the grinding chamber 200a. The grinding machine may include a material feeding device communicating with the feed port 200c and / or a grinding media feeding device communicating with the grinding media inlet 200d. The specific structural form of the above devices can be determined according to the specific types of materials and grinding media, and there are no restrictions on this.

[0044] The grinding cylinder 200 has a feed end and a discharge end at its two ends along its axial direction, respectively. The feed inlet 200c is located on the side closer to the feed end, and the discharge outlet 200b is located on the side closer to the discharge end. It can be understood that in actual use, material will be continuously fed into the grinding chamber 200a from the feed inlet 200c. Therefore, the material in the grinding chamber 200a will move from the feed end to the discharge end of the grinding cylinder 200 under the action of pressure difference.

[0045] The grinding media inlet 200d is located between the feed inlet 200c and the discharge outlet 200b along the axial direction of the grinding cylinder 200. The specific location is not limited. It can be set on the side near the feed end, the side near the discharge end, or the middle position along the axial direction of the grinding cylinder 200.

[0046] In some embodiments, the grinding cylinder 200 further has a grinding media discharge port 200f communicating with the grinding chamber 200a. The grinding media discharge port 200f is located on the side near the discharge end and is used to discharge grinding media. As an example, the grinding media discharge port 200f is located on the end face of the discharge end of the grinding cylinder 200 and is located relatively close to the bottom end of the grinding cylinder 200. Since the density of the grinding media is usually greater than the density of the material, the grinding media usually settles at the bottom of the grinding chamber 200a after the grinder stops. Setting the grinding media discharge port 200f here helps to improve the discharge efficiency.

[0047] In some embodiments, the grinding cylinder 200 further has a material discharge port 200e communicating with the grinding chamber 200a. Unlike the discharge port 200b described above, the material discharge port 200e is used to discharge material from the grinding chamber 200a in case of an accident. Under normal use, the material discharge port 200e is in a closed state. As an example, the material discharge port 200e is located on the end face of the discharge end of the grinding cylinder 200 and is positioned relatively close to the top of the grinding cylinder 200. This facilitates control of the discharge volume and discharge rate of the material discharge port 200e and reduces the probability that grinding media will be discharged from the material discharge port 200e.

[0048] The grinding machine also includes a grinding element 300, which is disposed within the grinding chamber 200a and is rotatable about the central axis of the grinding cylinder 200. The specific structural form of the grinding element 300 is not limited. As an example, the grinding element 300 includes a plurality of grinding discs 301 distributed along the axial direction of the grinding cylinder 200. The plurality of grinding discs 301 are rotatable independently and / or synchronously about the central axis of the grinding cylinder 200.

[0049] The grinding machine may include a drive device for driving the grinding workpiece 300 to rotate, and the specific structure of the drive device is not limited.

[0050] The grinding element 300 serves two purposes: firstly, it agitates the material and grinding media, ensuring thorough mixing and mutual friction to achieve grinding; secondly, it provides power for the material and grinding media to move from the feed end to the discharge end.

[0051] Reference Figure 1 and Figure 2 The discharge device 100 has a material inlet 20b and a material outlet 10b. The material inlet 20b is connected to the discharge port 200b, and the material outlet 10b is connected to the material inlet 20b and is located on the top side of the material inlet 20b. It should be noted that in this embodiment, the discharge port 200b can be located on the top side of the grinding cylinder 200, or on the axial end face, radial side face, etc. of the grinding cylinder 200, and there is no limitation thereto.

[0052] Reference Figure 1 and Figure 2 The discharge device 100 includes a housing 10 and a screen 20.

[0053] The housing 10 has a mounting cavity 10a, and a screen 20 is disposed within the mounting cavity 10a of the housing 10. The screen 20 has a filtering cavity 20a with sieve holes communicating with the filtering cavity 20a. The specific structural forms of the housing 10 and the screen 20 are not limited, as long as they can form the aforementioned mounting cavity 10a, filtering cavity 20a, and sieve holes. The aperture of the sieve holes can be specifically determined by those skilled in the art based on the actual desired particle size of the material, and there is no limitation thereto.

[0054] One of the housing 10 and the screen 20 has a material inlet 20b and the other has a material outlet 10b.

[0055] exist Figure 1 and Figure 2In the illustrated embodiment, the housing 10 has a material outlet 10b, and the screen 20 has a material inlet 20b. The material outlet 10b is connected to the mounting cavity 10a, and the material inlet 20b is connected to the filtering cavity 20a, thereby achieving communication between the material inlet 20b and the material outlet 10b. In this embodiment, the material enters the filtering cavity 20a of the screen 20 from the material inlet 20b, then enters the mounting cavity 10a of the housing 10 through the screen holes, and finally is discharged through the material outlet 10b.

[0056] Of course, in some other embodiments, the housing 10 may have a material inlet 20b, and the screen 20 may have a material outlet 10b. The material inlet 20b is connected to the mounting cavity 10a, and the material outlet 10b is connected to the filtering cavity 20a, thereby achieving communication between the material inlet 20b and the material outlet 10b. In this embodiment, the material will enter the mounting cavity 10a of the housing 10 from the material inlet 20b, then enter the filtering cavity 20a of the screen 20 through the screen holes, and finally be discharged through the material outlet 10b.

[0057] In this application, the description will mainly focus on the case where the shell 10 has a material outlet 10b and the screen 20 has a material inlet 20b.

[0058] In this embodiment, as an example, the housing 10 can be generally formed as a cylindrical structure with its axial direction parallel to the height direction. The material outlet 10b can be formed on the circumferential wall or the axial end wall of the housing 10. One axial end of the housing 10 is connected to the grinding cylinder 200, which can be a direct connection or an indirect connection through an intermediate structure. The specific connection method is not limited, such as welding, fastener connection, etc. Alternatively, at least a portion of the housing 10 and the grinding cylinder 200 can be formed as an integral structure.

[0059] In this embodiment, by configuring the discharge device 100 to include a housing 10 and a screen 20, the material can be screened by the screen 20 before being discharged, thereby helping to improve the grinding accuracy.

[0060] It is understandable that in actual use, the feed inlet 200c of the grinding cylinder 200 will be continuously fed with materials, and the materials at the material outlet 10b of the discharge device 100 will also be continuously discharged. Therefore, there will be a pressure difference between the feed inlet 200c, the discharge outlet 200b and the material outlet 10b. In addition, as mentioned above, the grinding element 300 can also provide power for the flow of materials. The materials will be able to use these forces to resist gravity, thereby achieving the flow from the material inlet 20b to the material outlet 10b along the height direction to complete the discharge.

[0061] In related technologies, grinding mills with horizontally placed grinding cylinders (i.e., with the axial direction perpendicular to the height direction of the grinding mill) are usually configured to discharge material from the axial end face of the grinding cylinder, and the material outlet and material inlet of the discharge device are roughly horizontally distributed. When the discharge device is damaged, the material in the grinding cylinder must be discharged before repair and replacement can be carried out. The repair is difficult and requires a long downtime, especially when the material is asphalt or other materials that need to be heated during the grinding process. Before discharging the material, it is necessary to wait for the material to cool down, which further prolongs the downtime.

[0062] In this embodiment, the material outlet 10b of the discharge device 100 is located on the top side of the material inlet 20b. The material in the discharge device 100 will flow upward. In the event of damage to the discharge device 100, the material in the discharge device 100 will flow back into the grinding chamber under the action of gravity after the grinder stops. This can significantly reduce the maintenance difficulty of the discharge device 100 and the downtime during maintenance.

[0063] Furthermore, it is understood that the grinding media mixed in the material are relatively highly affected by gravity. Therefore, in actual use, as the material flows from the material inlet 20b to the material outlet 10b, the grinding media may fall back into the grinding chamber 200a under the action of gravity, which helps to reduce the wear between the grinding media and the discharge device 100 and improve the service life of the discharge device 100.

[0064] In some embodiments, refer to Figure 1 and 2 The discharge device also includes a first stop mechanism 30.

[0065] The first stop mechanism 30 is located on the bottom side of the screen 20 and is connected to the discharge port 200b and the material inlet 20b.

[0066] Taking a screen 20 having a material inlet 20b and a housing 10 having a material outlet 10b as an example, in actual use, the material will roughly follow... Figure 2 The material flows in the direction indicated by the middle arrow. Specifically, under the pressure difference between the inlet 200c, the outlet 200b, and the material outlet 10b, the material flowing to the outlet end of the grinding cylinder 200 will flow out from the outlet 200b and enter the filter chamber 20a of the screen 20 via the first stop mechanism 30 and the material inlet 20b. Then, the material with the required particle size will be able to pass through the screen holes and enter the installation chamber 10a, and be discharged through the material outlet 10b.

[0067] The first stop mechanism 30 is specifically used to block grinding media mixed in the material, for example, to prevent grinding media from entering the filter chamber 20a. As an example, the first stop mechanism 30 has one or more flow channels that allow material to pass through but prevent grinding media from passing through. The flow channels connect the discharge port 200b and the material inlet 20b. Specifically, the material can pass through the flow channel while the grinding media cannot pass through the flow channel by controlling the flow area of ​​the flow channel.

[0068] In this embodiment, a first stop mechanism 30 is provided on the bottom side of the screen. The first stop mechanism 30 can block the grinding media in the material, thereby reducing the probability of the grinding media contacting the screen 20 and causing wear, and thus improving the service life of the screen 20.

[0069] In some embodiments, refer to Figure 2 and Figure 3 The screen 20 is configured as a cylindrical structure with the axial direction parallel to the height direction. The screen 20 is open on one side facing the first stop mechanism 30 to form a material inlet 20b. The screen holes are formed at least on the circumferential wall 21 of the screen 20.

[0070] Specifically, the screen 20 includes a circumferential wall 21 and a top wall 22 connected to the circumferential wall 21. The bottom opening of the circumferential wall 21 forms a material inlet 20b, and the top wall 22 covers the top opening of the axial wall. The circumferential wall 21 and the top wall 22 together form a filter chamber 20a. The circumferential wall 21 and the top wall 22 can be connected by welding, bonding, or other methods, or the circumferential wall 21 and the top wall 22 can be formed as an integral structure.

[0071] Screen holes are formed at least on the circumferential wall 21 of the screen 20, and in some embodiments, screen holes may also be formed on the top wall 22.

[0072] In this embodiment, the screen 20 with this structural form helps to increase the volume of the filter chamber 20a and the density of the screen holes, thereby improving the screening efficiency of the screen 20.

[0073] In some embodiments, refer to Figure 2 and Figure 4 The first stop mechanism 30 includes a filter plate 31, the thickness direction of the filter plate 31 is parallel to the height direction, and the filter plate 31 has a material flow channel 31a that extends through the filter plate 31 along the height direction.

[0074] As an example, in the orthographic projection along the height direction, the projection of the filter plate 31 roughly coincides with the projection of the discharge port 200b, or the projection of the filter plate 31 extends beyond the projection of the discharge port 200b.

[0075] The filter plate 31 can be located inside or outside the discharge port 200b, and there is no restriction on this.

[0076] The filter plate 31 is connected to the grinding cylinder 200. The specific connection method is not limited, such as welding, bonding, snap-fitting, fastener connection, etc.

[0077] The filter plate 31 may have one or more material flow channels 31a. As mentioned above, the material can pass through the material flow channel 31a while the grinding media cannot pass through the material flow channel 31a by reasonably setting the flow area of ​​the material flow channel 31a (i.e., the area of ​​the cross section perpendicular to the material flow direction).

[0078] In this embodiment, the first stop mechanism 30 with this structural form helps to simplify the structure of the discharge device 100 and reduce costs.

[0079] In some embodiments, refer to Figure 5 Along the direction closer to the screen 20, the flow area of ​​the material flow channel 31a increases.

[0080] As mentioned above, the flow area of ​​material flow channel 31a refers to the area of ​​the cross section perpendicular to the material flow direction (i.e., the height direction).

[0081] Here, the flow area of ​​the material flow channel 31a can be continuously increased from the end away from the screen 20 to the end closer to the screen 20, or it can be increased only in one or a few sections, while the flow area of ​​the rest remains roughly unchanged.

[0082] The increase in the circulation area of ​​logistics channels can be linear or stepwise, and there is no restriction on this.

[0083] It is understandable that although the material flow channel 31a is designed to prevent the passage of grinding media, the grinding media will also experience a certain degree of wear and tear during actual use, resulting in a reduction in volume. Therefore, the material flowing into the material flow channel 31a may still contain grinding media. In this embodiment, the flow area of ​​the material flow channel 31a is set to increase along the direction close to the screen 20 (that is, the actual flow direction of the material). In this way, the grinding media that has entered the material flow channel 31a can pass through the material flow channel 31a more smoothly, reducing the probability of the material flow channel 31a being blocked by the grinding media.

[0084] It should be noted that in some other embodiments, the flow area of ​​the material flow channel 31a along the height direction can also be set to remain approximately unchanged.

[0085] In some embodiments, refer to Figure 4 and Figure 5 The filter plate 31 includes an annular body 311 and multiple baffles 312 arranged side by side and spaced apart. The two ends of the baffles 312 in the extending direction are connected to the annular body 311, and a material flow channel 31a is formed between adjacent baffles 312.

[0086] Here, the specific shape of the annular body 311 is not limited. As an example, in an embodiment where at least a portion of the filter plate 31 is disposed within the discharge port 200b, the annular body 311 can be fitted to the inner surface of the discharge port 200b. Of course, in embodiments where the filter plate 31 is disposed outside the discharge port 200b, the annular body 311 can be of any shape.

[0087] Here, the parallel arrangement of the retaining ribs 312 specifically means that the extension directions of each retaining rib 312 are roughly parallel. The connection method between the retaining ribs 312 and the annular body 311 is not limited, such as welding, bonding, snap-fitting, fastener connection, etc., or the retaining ribs 312 can form an integral structure with the annular body 311.

[0088] In this embodiment, the filter plate 31 with this structural form helps to increase the total area of ​​the material flow channel 31a, thereby increasing the material flow rate.

[0089] Furthermore, in this embodiment, reference is made to... Figure 4 and Figure 5 Along the arrangement direction of the baffle 312, the baffle 312 has a first guide surface 312a and a second guide surface 312b. In two adjacent baffles 312, the first guide surface 312a of one baffle 312 and the second guide surface 312b of the other baffle 312 are arranged opposite to each other. Along the direction close to the screen 20, the first guide surface 312a and the corresponding second guide surface 312b extend inclinedly away from each other, thereby increasing the flow area of ​​the material flow channel 31a along the direction close to the screen 20.

[0090] In some embodiments, refer to Figure 4 and Figure 5 At least a portion of the filter plate 31 is disposed within the discharge port 200b, and along the height direction, the surface of the filter plate 31 facing away from the screen 20 does not extend beyond the inner surface of the grinding cylinder 200.

[0091] Taking the discharge port 200b located on the top side of the grinding cylinder 200 as an example, the surface of the filter plate 31 facing away from the screen 20 is formed into an arc shape. It can be understood that the specific curvature of the arc shape of the filter plate 31 can be determined according to the curvature of the wall surface of the filter cylinder corresponding to the discharge port 200b. In some embodiments, specifically, the arc shape of the filter plate 31 is coplanar with the inner surface of the grinding cylinder 200.

[0092] In this embodiment, by setting the side surface of the filter plate 31 away from the screen 20 to not exceed the inner surface of the grinding cylinder 200, it helps to reduce the probability of wear between the filter plate 31 and the grinding media and materials in the grinding chamber 200a, and improve the service life of the filter plate 31.

[0093] In the embodiment where the discharge port 200b is located on the top side of the grinding cylinder 200, the filter plate 31 can be further formed as an arc-shaped plate. In other words, both the surface of the filter plate 31 facing the screen 20 and the surface facing away from the screen 20 can be formed as arc-shaped surfaces. This allows the filter plate 31 to better fit the grinding cylinder 200, improving its positional stability and stopping performance.

[0094] In some embodiments, the annular body 311 has a stepped surface facing the grinding cylinder 200, and the stepped surface abuts against the outer surface of the grinding cylinder 200. This achieves a fixed connection between the filter plate 31 and the grinding cylinder 200. Here, the stepped surface and the outer surface of the grinding cylinder 200 can be fixed by welding, bonding, fasteners, or other connection methods. Alternatively, the stepped surface and the outer surface of the grinding cylinder 200 can simply abut against each other without a fixed connection; in this case, the positional stability of the filter plate 31 can be maintained by its own weight.

[0095] In some embodiments, refer to Figure 4 and Figure 5 In an embodiment where the discharge port 200b is located on the top side of the grinding cylinder 200, the material flow channel 31a extends circumferentially along the grinding cylinder 200.

[0096] Taking the filter plate 31, which includes an annular body 311 and baffle 312, as an example, the baffle 312 is configured to extend along the circumference of the grinding cylinder 200, thereby realizing that the material flow channel 31a extends along the circumference of the grinding cylinder 200.

[0097] As mentioned above, the grinding cylinder 200 may contain a grinding element 300. The grinding element 300 is configured to rotate around the central axis of the grinding cylinder 200. In this case, the material and grinding media within the grinding cylinder 200 will undergo circular motion under the centrifugal force provided by the grinding element 300. In this embodiment, the material flow channel 31a is configured to extend circumferentially along the grinding cylinder 200. This reduces the resistance of the filter plate 31 to the material, allowing the material to quickly pass through the media flow channel under centrifugal force. Furthermore, this configuration effectively reduces the impact of the grinding media within the grinding chamber 200a on the filter plate 31 (e.g., the impact on the baffle 312), thereby extending the service life of the filter plate 31.

[0098] In some embodiments, refer to Figure 2 The discharge device 100 also includes a second stop mechanism 40, which is disposed between the screen 20 and the first stop mechanism 30. The second stop mechanism 40 is connected to the first stop mechanism 30 and the material inlet 20b.

[0099] Similar to the first stop mechanism 30, the second stop mechanism 40 is also used to prevent the grinding media in the material from entering the filter chamber 20a. The specific structural form of the second stop mechanism 40 is not limited. For example, the structure of the second stop mechanism 40 can be referenced, as long as it can prevent the grinding media from entering the filter chamber 20a.

[0100] In this embodiment, by setting a two-stage stop mechanism, namely the first stop mechanism 30 and the second stop mechanism 40, the probability of the grinding media entering the filter chamber 20a can be further reduced, thereby increasing the service life of the screen 20.

[0101] In some embodiments, refer to Figure 2 and Figure 6 The second stop mechanism 40 includes a cylindrical body 41 and a guide wall 42 disposed within the cylindrical body 41. The axial direction of the cylindrical body 41 is parallel to the height direction. Along the height direction, the end of the cylindrical body 41 away from the screen 20 forms an opening, which is covered by the first stop mechanism 30. One end of the guide wall 42 extends along the periphery of the material inlet 20b, and the other end is spaced apart from the first stop mechanism 30. A flow cavity 40b is formed between the guide wall 42 and the screen 20, and a buffer cavity 40a is formed between the guide wall 42, the cylindrical body 41, and the first stop mechanism 30. The buffer cavity 40a communicates with the flow cavity 40b.

[0102] Here, the cylindrical body 41 is specifically formed into a generally cylindrical structure. As an example, the cylindrical body 41 includes a cylindrical wall 411 and a barrier wall 412. The barrier wall 412 connects the cylindrical wall 411 and the guide wall 42. One end of the screen 20 is connected to the barrier wall 412. The barrier wall 412 is used to block the buffer cavity 40a and the mounting cavity 10a of the housing 10.

[0103] The cylindrical body 41 has an opening at one end away from the screen 20, and the first stop mechanism 30 covers the opening. As mentioned above, in some embodiments, the first stop mechanism 30 includes an arc-shaped filter plate 31. In this embodiment, the bottom end face of the cylindrical body 41 is correspondingly set as an arc-shaped surface, so that the first stop mechanism 30 can better cover the bottom opening of the cylindrical body 41.

[0104] In this embodiment, reference is made to... Figure 2 Most of the material needs to enter the buffer chamber 40a after flowing out of the first stop mechanism 30, and then enter the flow chamber 40b under the guidance of the guide wall 42. During this period, the flow direction of the material will change to a certain extent. Since the flow of the grinding media is relatively poor, most of the grinding media will remain in the buffer chamber 40a and cannot enter the flow chamber 40b, thus achieving the stop of the grinding media.

[0105] In some embodiments, refer to Figure 2 and6 The guide wall 42 extends along the periphery of the material inlet 20b to form a ring-shaped closed structure. Along the height direction, the end of the guide wall 42 away from the screen 20 forms an opening that connects the buffer chamber 40a and the flow chamber 40b.

[0106] In this embodiment, by forming the guide wall 42 into an annular wall, the blocking effect of the guide wall 42 can be maximized, thereby further reducing the probability that the grinding media enters the flow cavity 40b and then the filter cavity 20a.

[0107] In some embodiments, refer to Figure 2 and Figure 6 The guide wall 42 extends obliquely toward the cylindrical wall 411 closer to the cylindrical body 41 in a direction away from the first stop mechanism 30.

[0108] In this embodiment, by setting the guide wall 42 to extend at an angle, on the one hand, the grinding media can be guided to slide down one side surface of the cylindrical wall 411, thereby further reducing the probability of the grinding media entering the flow cavity 40b. On the other hand, the flowability of the material can be improved, thereby improving the material throughput efficiency.

[0109] In some embodiments, refer to Figure 2 The discharge device 100 also includes a connecting cylinder 60, which connects the grinding cylinder 200 and the housing 10. The circumferential outer surface of the cylindrical body 41 is in contact with the inner surface of the connecting cylinder 60.

[0110] Here, the connecting cylinder 60 is specifically formed as a cylindrical structure extending along the height direction. The housing 10 and the connecting cylinder 60 can be connected by fasteners (e.g., flanges), or by welding, snap-fitting, or they can be formed as an integral structure. The connecting cylinder 60 and the grinding cylinder 200 can also be connected by fasteners, welding, or they can be formed as an integral structure. In some specific embodiments, the connecting cylinder 60 and the grinding cylinder 200 are formed as an integral structure, and the connecting cylinder 60 is connected to the housing 10 by a flange.

[0111] In this embodiment, by providing the connecting cylinder 60, the structural strength requirements of the cylindrical body 41 can be reduced, allowing the cylindrical body 41 to be made of a material with relatively low structural strength but relatively low friction with the material and relatively good wear resistance, thereby helping to improve the efficiency of the material passing through the second stop mechanism 40. On the other hand, the connecting cylinder 60 can also serve as a transfer mechanism, reducing the difficulty of connecting the housing 10 and the grinding cylinder 200. Of course, in some other embodiments, the connecting cylinder 60 may not be provided, and the second stop mechanism 40 may be located within the mounting cavity 10a of the housing 10.

[0112] In some embodiments, refer to Figure 2 The cylindrical body 41 forms the observation area 41a.

[0113] Here, the observation area 41a specifically refers to the area through which light can pass. For example, the observation area 41a can be an area formed by a transparent material (the entire cylindrical body 41 can be formed by a transparent material, or the observation area 41a can be formed by a transparent material while other areas of the cylindrical body 41 are formed by a non-transparent material). Alternatively, the observation area 41a can be an area formed by partially hollowing out the cylindrical body 41. In this case, a transparent structure (such as a window structure) that can block the observation area 41a needs to be provided on the outside of the cylindrical body 41 in order to prevent material from leaking from the observation area 41a.

[0114] The specific location of the observation area 41a is not limited. As an example, the observation area 41a is formed on at least one side of the cylindrical body 41 along the radial direction of the grinding cylinder 200 (a direction that is perpendicular to both the axial direction of the grinding cylinder and the height direction of the grinding machine), thereby facilitating the operator to approach and observe.

[0115] In an embodiment where the discharge device 100 includes a connecting cylinder 60, the connecting cylinder 60 is provided with an observation window at a position corresponding to the observation area 41a, thereby enabling observation.

[0116] The specific structural form of the observation window is not limited. As an example, the observation window includes a window body and a blocking member disposed on the side of the window body opposite to the inside of the connecting cylinder. The blocking member is movably connected to the connecting cylinder, allowing it to move between a first position that blocks the window body and a second position that exposes the window body. When observation is needed, the operator can move the blocking member to the second position for observation, and after observation, move the blocking member back to the first position. Of course, in some embodiments, the observation window may only include the window body and not the blocking member.

[0117] In this embodiment, by providing an observation area 41a on the inner surface of the cylindrical body 41, it is convenient for operators to observe the material flow in the buffer cavity 40a and / or the first stop mechanism 30, so that operators can deal with the blockage of materials in a timely manner and reduce the impact.

[0118] In some other embodiments, the discharge device 100 may not include the second stop mechanism 40. Alternatively, the discharge device 100 may include the aforementioned connecting cylinder 60 and a liner disposed within the connecting cylinder 60. The liner is mainly used to improve wear resistance. For highly viscous materials such as asphalt, it can also reduce the coefficient of friction and improve the material's throughput. Those skilled in the art can select wear-resistant materials to prepare the liner. The specific material can be determined based on the material actually being processed by the grinder and the grinding material used. For example, the liner material can be a metallic material, such as cemented carbide (e.g., tungsten carbide, titanium carbide), powder metallurgy alloy (e.g., high wear-resistant aluminum alloy, iron-based powder metallurgy material), special steel, etc. Alternatively, the liner material can be a non-metallic material, such as engineering plastics (e.g., modified nylon, polyoxymethylene, polyetheretherketone, polytetrafluoroethylene, etc.), ceramic materials (e.g., alumina, silicon nitride, etc.). It is understood that the aforementioned first stop mechanism 30 and / or second stop mechanism 40 can also be prepared using such materials.

[0119] The specific structural form of the liner can refer to the above-mentioned cylindrical body 41 (in other words, the difference between the liner and the third stop mechanism is that the liner does not have a guide wall 42). For example, it may include the above-mentioned cylindrical wall 411 and a blocking wall. The blocking wall extends along the periphery of the material inlet 20b. Furthermore, the liner can form an observation area 41a. Correspondingly, the connecting cylinder 60 is provided with an observation window at the position corresponding to the observation area.

[0120] In this embodiment, in addition to its aforementioned connecting function, the connecting cylinder 60 also increases the height-direction distance between the screen 20 and the first stop mechanism 30. Consequently, the grinding media passing through the first stop mechanism 30 will be affected by gravity as it moves towards the screen 20, reducing the probability of the grinding media entering the filter chamber 20a and thus decreasing the probability of wear between the grinding media and the screen 20. Of course, in some embodiments, only the connecting cylinder 60 may be provided without the liner.

[0121] In some embodiments, refer to Figure 2 The discharge device 100 also includes a guide 50, which is used to apply centrifugal force to the material.

[0122] Taking a screen 20 having a material inlet 20b and a housing 10 having a material outlet 10b as an example, the guide 50 applies centrifugal force to the material, which helps to improve the efficiency of the material flowing from the filter chamber 20a to the mounting chamber 10a.

[0123] In an embodiment where the housing 10 has a material inlet 20b and the screen 20 has a material outlet 10b, the guide 50 applies centrifugal force to the material, which helps to centrifuge the grinding media that is less likely to escape into the mounting cavity 10a, thereby further reducing the probability of the grinding media coming into contact with the screen 20.

[0124] The specific structure of the guide 50 is not limited, as long as it can apply centrifugal force to the material.

[0125] In some embodiments, the screen 20 is formed as a cylindrical structure with the axial direction parallel to the height direction, and the guide 50 includes a drive part 51 and a rotor 52. The drive part 51 is used to drive the rotor 52 to rotate around the central axis of the screen 20 in the mounting cavity 10a.

[0126] In this embodiment, the specific structure of the screen 20 can be referred to the description in the relevant section above, and will not be repeated here.

[0127] In this embodiment, the rotor 52 rotates within the mounting cavity 10a, and the rotation range is large, so the material will generate a strong centrifugal force during the movement of the rotor 52.

[0128] In some embodiments, refer to Figure 2 The rotor 52 includes a first rotor 521 having a plurality of disturbance arms 5211 distributed circumferentially along the screen 20, the disturbance arms 5211 extending in the height direction. And / or, the rotor 52 includes a second rotor 522 disposed on one side of the screen 20 in the height direction, the second rotor 522 having a plurality of blades 5221 extending radially along the screen 20.

[0129] It is understood that in this embodiment, a gap is formed between adjacent disturbance arms 5211, and material can pass through the gap between adjacent disturbance arms 5211.

[0130] Taking a screen 20 having a material inlet 20b and a housing 10 having a material outlet 10b as an example, refer to... Figure 7 The first rotor 521 includes a transition plate 5212 and disturbance arms 5211. The transition plate 5212 is disposed on the top side of the screen 20 and is used to connect with the drive unit 51. One end of each disturbance arm 5211 is connected to the transition plate 5212. In some embodiments, the first rotor 521 further includes a reinforcing ring 5213, and the other end of each disturbance arm 5211 is connected to the reinforcing ring 5213, thereby improving the structural strength of the disturbance arm 5211. In this embodiment, the transition plate 5212 is specifically disposed on the side of the screen facing away from the first stop mechanism 30 along the height direction.

[0131] In some embodiments, the aforementioned adapter plate 5212 may further have a through hole extending through the adapter plate 5212 along its thickness direction, thereby further reducing the obstruction of the material flow path by the first rotor 521.

[0132] In some embodiments, the disturbance arm 5211 can be rotatably connected to the aforementioned adapter plate 5212 and reinforcing ring 5213, allowing the disturbance arm 5211 to rotate relative to the adapter plate 5212 and reinforcing ring 5123 about an axis in the height direction. In this embodiment, the disturbance arm 5211 can both revolve and rotate, thereby achieving a better guiding effect.

[0133] As an example, the second rotor 522 may include a main body and a plurality of blades 5221 distributed circumferentially along the main body, the main body being used to connect with the drive unit 51.

[0134] In this embodiment, the first rotor 521 has a larger contact area with the material and stronger guiding ability, while the second rotor 522 has a simple structure and lower manufacturing cost. Those skilled in the art can set one of the first rotor 521 and the second rotor 522 according to actual usage requirements, or set both the first rotor 521 and the second rotor 522 simultaneously.

[0135] In the above embodiments, as an example, the drive unit 51 specifically includes a motor 511 and a rotating shaft 512 connected to the output end of the motor 511. The rotating shaft 512 is coaxially arranged with the cylindrical body 41, and the first rotor 521 and / or the second rotor 522 are connected to the drive shaft.

[0136] In some embodiments, refer to Figure 8 As mentioned above, the grinder includes a grinding element 300 disposed within the grinding chamber 200a. The grinding element 300 is configured to rotate unidirectionally about the central axis of the grinding cylinder 200, and the geometric center of the discharge port 200b is located downstream of the reference plane. Figure 8 In the illustrated embodiment, specifically, the discharge port 200b is formed on the top side of the grinding cylinder 200.

[0137] Here, the reference plane is parallel to the height direction of the grinder and the central axis of the grinding cylinder 200 is located within the reference plane. In other words, the reference plane is a vertical plane that bisects the grinding chamber 200a.

[0138] It is understood that the grinding element 300 will drive the material and grinding media to make circular motion during the rotation process. In this embodiment, at least a part of the discharge port 200b is set downstream of the reference surface along the rotation direction. In this way, when the grinding media approaches the discharge port 200b, there will be a downward force, which can reduce the probability of the grinding media entering the discharge device 100, thereby reducing the probability of wear between the grinding media and the screen 20.

[0139] As an example, the geometric center of the discharge port 200b is located in the plane where the reference plane is located after rotating 45° in the direction of rotation.

[0140] Of course, in some other embodiments, the geometric center of the discharge port 200b may also be set on the reference surface or upstream of the reference surface along the rotation direction.

[0141] Embodiments of this application also provide a discharge device 100, which is the discharge device 100 in the grinding mill described in any of the above embodiments.

[0142] The discharge device 100 of this application embodiment has all the advantages of the grinder described in any of the above embodiments, and will not be repeated here.

[0143] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0144] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A grinder characterized by, The grinding mill includes: A grinding cylinder having a grinding chamber and a discharge port communicating with the grinding chamber, wherein the axial direction of the grinding cylinder is perpendicular to the height direction of the grinding machine; and A discharge device includes a housing and a screen. The housing has an installation cavity and a material outlet communicating with the installation cavity. The screen is disposed in the installation cavity and has a filter cavity, a screen hole communicating with the filter cavity, and a material inlet communicating with the filter cavity. The screen hole communicates the filter cavity and the installation cavity. The material outlet is located on the top side of the material inlet along the height direction of the grinder.

2. The grinder of claim 1, wherein, The discharge device includes: A first stop mechanism is disposed on the bottom side of the screen and connects the discharge port and the material inlet. The first stop mechanism is used to block the grinding media in the material.

3. The grinder of claim 2, wherein, The first stop mechanism includes a filter plate, the thickness direction of which is parallel to the height direction, and the filter plate has a material flow channel that extends through the filter plate along the height direction.

4. The grinder of claim 3, wherein, Along the direction closer to the screen, the flow area of ​​the material channel increases; and / or At least a portion of the filter plate is disposed inside the discharge port, and along the height direction, the side of the filter plate facing away from the screen does not extend beyond the inner surface of the grinding cylinder; and / or The filter plate includes an annular body and multiple baffles arranged side by side and spaced apart. The two ends of the baffles in the extending direction are connected to the annular body, and the material flow channel is formed between adjacent baffles.

5. The grinder of claim 2, wherein, The discharge device further includes a second stop mechanism, which is disposed between the screen and the first stop mechanism. The second stop mechanism is connected to the first stop mechanism and the material inlet.

6. The grinder of claim 5, wherein, The second stop mechanism includes a cylindrical body and a guide wall disposed within the cylindrical body. The axial direction of the cylindrical body is parallel to the height direction. Along the height direction, an opening is formed at one end of the cylindrical body away from the screen. The first stop mechanism covers the opening. One end of the guide wall extends along the periphery of the material inlet, and the other end is spaced apart from the first stop mechanism. A flow cavity is formed between the guide wall and the screen. A buffer cavity is formed between the guide wall, the cylindrical body, and the first stop mechanism. The buffer cavity communicates with the flow cavity.

7. The grinder of claim 6, wherein, The guide wall extends along the periphery of the material inlet to form a closed annular structure. Along the height direction, the end of the guide wall away from the screen forms a connecting hole linking the buffer chamber and the flow chamber; and / or Along a direction away from the first stop mechanism, the guide wall extends obliquely toward the circumferential wall of the cylindrical body; and / or The cylindrical body forms the observation area.

8. The grinder of claim 1, wherein, The discharge device also includes a guide member for applying centrifugal force to the material.

9. The grinder of claim 8, wherein, The screen is formed as a cylindrical structure with its axial direction parallel to the height direction. The guide includes a drive unit and a rotor. The drive unit is used to drive the rotor to rotate around the central axis of the screen.

10. The grinder of claim 9, wherein, The rotor includes a first rotor having a plurality of disturbance arms distributed circumferentially along the screen, the disturbance arms extending along the height direction; and / or The rotor includes a second rotor disposed on one side of the screen along the height direction, the second rotor having a plurality of blades extending radially along the screen.

11. The grinder of any one of claims 1-10, wherein, The grinding machine includes a grinding element disposed within the grinding chamber. The grinding element is configured to rotate unidirectionally about the central axis of the grinding cylinder. Along the rotation direction of the grinding element, the geometric center of the discharge port is located downstream of a reference surface. The reference surface is parallel to the height direction of the grinding machine, and the central axis of the grinding cylinder is located within the reference surface.

12. A discharge device characterized by comprising: The discharge device is the discharge device of the grinding mill according to any one of claims 1-11.

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