Grinding production line

Abstract

An embodiment of the present application provides a grinding production line, which includes a first grinding machine and a second grinding machine. The first grinding machine includes a first discharge port. The second grinding machine is a vertical grinding machine, which includes a second feed port and a second discharge port located above the second feed port. The first discharge port is communicated with the second feed port. In the grinding production line provided by the embodiment of the present application, the material discharged from the first discharge port enters the second grinding machine through the second feed port. The material discharged from the first discharge port carries a small amount of grinding medium into the second grinding machine, so that the grinding medium can be reused, avoiding waste of the grinding medium.

Description

Technical Field

[0001] This application relates to the technical field of material grinding, and particularly to a grinding production line. Background Art

[0002] Natural asphalt, also known as bitumen or mineral asphalt, has its light components evaporated, and then, under sunlight, it is oxidized by oxygen in the air and polymerized to become mineral asphalt, which mainly consists of asphaltene, resin, etc., as well as a small amount of other inorganic substances such as metals and non-metals. The natural asphalt ore is crushed and ground, and then a processing fluid is added to the ground asphalt powder to form a natural asphalt mixed slurry.

[0003] In the existing grinding machines for grinding natural asphalt mixed slurry, grinding media such as grinding balls are easily discharged from the grinding machine together with the ground natural asphalt mixed slurry. This situation not only results in a low purity of the ground natural asphalt mixed slurry, but also a low utilization rate of the grinding media, easily causing waste of the grinding media. Summary of the Invention

[0004] In view of this, embodiments of this application are expected to provide a grinding production line to solve the technical problem in the prior art that grinding balls are easily discharged from the grinding machine together with the ground natural asphalt mixed slurry, resulting in a low utilization rate of the grinding media.

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

[0006] Embodiments of this application provide a grinding production line, including a first grinding machine and a second grinding machine. The first grinding machine includes a first discharge port. The second grinding machine is a vertical grinding machine, which includes a second feed port and a second discharge port located above the second feed port. The first discharge port is communicated with the second feed port.

[0007] Further, the first grinding machine is a horizontal grinding machine, which includes a first grinding cylinder with a first grinding chamber and a separation mechanism with a first separation chamber. The first grinding chamber is used to accommodate materials and grinding media, and the separation mechanism is used to separate materials and grinding media. The separation mechanism is located in the first grinding chamber, and the first discharge port is communicated with the first separation chamber.

[0008] Further, the first grinding machine includes a grinding shaft disposed in the first grinding chamber and a dynamic separation wheel rotor disposed outside the separation mechanism. The dynamic separation wheel rotor includes a turntable connected to the end of the grinding shaft and a plurality of connecting rods circumferentially distributed along the turntable. One end of each connecting rod is connected to the turntable.

[0009] Further, the second grinding machine includes:

[0010] A second grinding cylinder, in which a second grinding chamber and a diversion chamber communicating with each other are formed. The second grinding chamber is used to accommodate materials and grinding media, and the diversion chamber is used to collect the materials ground by the grinding media. The second feed port communicates with the second grinding chamber, and the second discharge port communicates with the diversion chamber;

[0011] A filter screen, which is arranged in the second grinding cylinder and divides the internal space of the second grinding cylinder into the second grinding chamber and at least one diversion chamber;

[0012] A stirring device configured to stir the materials and grinding media in the second grinding chamber.

[0013] Further, the stirring device includes a stirring shaft, a driving source, and a plurality of stirrers. The driving source is used to drive the stirring shaft to rotate. The stirrers are arranged on the stirring shaft and located in the second grinding chamber. Each stirrer includes a mounting seat, a plurality of stirring rods, and a plurality of stirring blades. The mounting seat has a hollow mounting channel. The plurality of stirring rods are arranged at intervals on the outer periphery of the mounting seat. One end of each stirring rod is connected to the mounting seat, and the other end of each stirring rod is connected to the corresponding stirring blade. Each stirrer is cooperatively installed with the stirring shaft through the mounting channel.

[0014] Further, the stirring blades of the stirrer near one end of the stirring shaft are configured to push the grinding media towards the other end of the stirring shaft;

[0015] And / or, the stirring blades of the stirrer located between the two ends of the stirring shaft are configured to purely rotate and push the grinding media;

[0016] And / or, the number of the stirring blades of the stirrer located at the two ends of the stirring shaft is more than the number of the stirring blades of the stirrer located between the two ends of the stirring shaft;

[0017] And / or, the stirring blades of two adjacent stirrers are aligned or misaligned.

[0018] Further, the diversion chamber surrounds the upper part of the second grinding chamber;

[0019] Or, the diversion chamber is arranged above the second grinding chamber.

[0020] Further, the filter screen is arranged in a single layer or multiple layers.

[0021] Further, the grinding production line includes a separator, which includes a separation cylinder and a sieve. The separation cylinder includes a second separation chamber, a separation inlet and a separation outlet that communicate with the second separation chamber. The sieve is disposed in the second separation chamber. The sieve separates the separation inlet from the separation outlet, and the second discharge port communicates with the separation inlet.

[0022] Further, the first grinder is a vertical grinder.

[0023] In the grinding production line provided by the embodiment of the present application, the material discharged from the first discharge port enters the second grinder through the second feed port. A small amount of grinding medium is entrained in the material discharged from the first discharge port and enters the second grinder, so that the grinding medium can be reused, avoiding waste of the grinding medium. Since the second grinder is a vertical grinder and the second discharge port is located above the second feed port, the mixture of the material and the grinding medium moves from bottom to top in the second grinder. The material to be ground with a larger particle size is located at the lower part of the second grinder, and the material with a smaller particle size after grinding is located at the upper part of the second grinder. Therefore, the material moves from bottom to top in the second grinder and finally discharges from the second discharge port of the second grinder. The grinding medium moves downward under the action of its own gravity. Therefore, the grinding medium is less distributed in the upper part of the second grinder, is uniformly mixed with the material in the middle part of the second grinder, and is more distributed in the lower part of the second grinder with a larger density. Therefore, with this design, it is avoided that the grinding medium is discharged from the second discharge port along with the material, improving the utilization rate of the grinding medium. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of a grinding production line in an embodiment of the present application;

[0025] Figure 2 is a schematic structural diagram of a first grinder in an embodiment of the present application;

[0026] Figure 3 is Figure 2 a partial cross-sectional view of the first grinder in

[0027] Figure 4 is a schematic structural diagram of a second grinder in an embodiment of the present application;

[0028] Figure 5 is Figure 4 the A-A view in

[0029] Figure 6 is Figure 5 the B-B view in

[0030] Figure 7 is a schematic structural diagram of a stirrer in an embodiment of the present application;

[0031] Figure 8 This is a schematic structural diagram of a stirring device in an embodiment of the present application. The driving source is not shown, and the direction indicated by the arrow in the figure is the rotation direction of the stirring shaft.

[0032] Figure 9 This is a half-sectional view of a separator in an embodiment of the present application.

[0033] Figure 10 It is Figure 9 View C-C in

[0034] Description of the reference numerals

[0035] The first grinder 100; the first discharge port 110; the first grinding cylinder 120; the first grinding chamber 120a; the separation mechanism 130; the first separation chamber 130a; the grinding shaft 140; the dynamic separation wheel rotor 150; the turntable 151; the connecting rod 152; the ring piece 153; the second grinder 200; the second feed port 210; the second discharge port 220; the second grinding cylinder 230; the second grinding chamber 230a; the diversion chamber 230b; the filter screen 240; the first layer of filter screen 241; the second layer of filter screen 242; the stirring device 250; the stirring shaft 251; the driving source 252; the stirrer 253; the mounting seat 2531; the mounting channel 2531a; the stirring rod 2532; the stirring blade 2533; the material-facing surface 2533a; the separator 300; the separation cylinder 310; the second separation chamber 310a; the separation inlet 310b; the separation outlet 310c; the screen 320. Detailed implementation manners

[0036] It should be noted that, without conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other. The detailed description in the specific implementation manners should be understood as an explanatory description of the purpose of the present application and should not be regarded as an improper limitation of the present application.

[0037] In the description of the present application, the orientation or positional relationship of "upper", "lower", "top", and "bottom" is the orientation or positional relationship based on the normal use state of the first grinder, the second grinder, the vertical grinder, and the horizontal grinder in the embodiments of the present application, as shown in the orientation or positional relationship in the drawings. It should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 construed as a limitation of the present application.

[0038] Please refer to Figure 1, an embodiment of the present application provides a grinding production line, including a first grinding machine 100 and a second grinding machine 200. The first grinding machine 100 includes a first discharge port 110. The second grinding machine 200 is a vertical grinding machine, and the second grinding machine 200 includes a second feed port 210 and a second discharge port 220 located above the second feed port 210. The first discharge port 110 is communicated with the second feed port 210.

[0039] The material discharged from the first discharge port 110 enters the second grinding machine 200 through the second feed port 210. A small amount of grinding medium is entrained in the material discharged from the first discharge port 110 and enters the second grinding machine 200, so that the grinding medium can be reused and the waste of the grinding medium is avoided. For example, the particle size of the grinding medium in the first grinding machine 100 and the second grinding machine 200 can be set differently. The particle size of the grinding medium in the first grinding machine 100 is larger than that of the grinding medium in the second grinding machine 200. Due to long-term wear, the particle size of the grinding medium in the first grinding machine 100 becomes smaller, and thus it enters the second grinding machine 200 from the first discharge port 110 through the second feed port 210 along with the ground material.

[0040] Since the second grinding machine 200 is a vertical grinding machine and the second discharge port 220 is located above the second feed port 210, the mixture of the material and the grinding medium moves from bottom to top in the second grinding machine 200. The material to be ground with a larger particle size is located at the lower part of the second grinding machine 200, and the material with a smaller particle size after grinding is located at the upper part of the second grinding machine 200. Therefore, the material moves from bottom to top in the second grinding machine 200 and finally discharges from the second grinding machine 200 through the second discharge port 220. The grinding medium moves downward under the action of its own gravity. Therefore, the grinding medium is less distributed in the upper part of the second grinding machine 200, is uniformly mixed with the material in the middle part of the second grinding machine 200, and is more distributed and denser in the lower part of the second grinding machine 200. Therefore, with this design, it is avoided that the grinding medium is discharged from the second discharge port 220 along with the material, and the utilization rate of the grinding medium is improved.

[0041] In an embodiment of the present application, please refer to Figure 2 and Figure 3, the first grinding machine 100 is a horizontal grinding machine. The first grinding machine 100 includes a first grinding cylinder 120 having a first grinding chamber 120a and a separating mechanism 130 having a first separating chamber 130a. The separating mechanism 130 is located within the first grinding chamber 120a. The first discharge port 110 communicates with the first separating chamber 130a. The first grinding chamber 120a is used to accommodate materials and grinding media. The separating mechanism 130 is used to separate materials and grinding media. The separating mechanism 130 separates the ground materials from the grinding media within the first grinding chamber 120a. The materials separated by the separating mechanism 130 are discharged from the first grinding machine 100 through the first discharge port 110, while the grinding media remain in the first grinding chamber 120a to continue grinding the materials, preventing the grinding media within the first grinding machine 100 from being discharged from the first discharge port 110 out of the first grinding chamber 120a, improving the utilization rate of the grinding media and avoiding waste of the grinding media.

[0042] In an embodiment of the present application, please refer to Figure 2 and Figure 3 , the first grinding machine 100 includes a grinding shaft 140 disposed within the first grinding chamber 120a and a dynamic separation wheel rotor 150 disposed outside the separating mechanism 130. The dynamic separation wheel rotor 150 includes a turntable 151 connected to the end of the grinding shaft 140 and a plurality of connecting rods 152 circumferentially distributed along the turntable 151. One end of the connecting rod 152 is connected to the turntable 151. Further, the dynamic separation wheel rotor 150 further includes an annular plate 153, and the other end of the connecting rod 152 is connected to the annular plate 153. Adding the connection between the annular plate 153 and the connecting rod 152 strengthens the stability of the connecting rod 152. The dynamic separation wheel rotor 150 preliminarily separates the materials from the grinding media.

[0043] In an embodiment of the present application, please refer to Figures 4 - 8 , the second grinding machine 200 includes a second grinding cylinder 230, a filter screen 240, and a stirring device 250. A second grinding chamber 230a and a diversion chamber 230b that communicate with each other are formed within the second grinding cylinder 230. The second grinding chamber 230a is used to accommodate materials and grinding media, and the diversion chamber 230b is used to collect the materials ground by the grinding media. The second feed port 210 communicates with the second grinding chamber 230a, and the second discharge port 220 communicates with the diversion chamber 230b. The filter screen 240 is disposed within the second grinding cylinder 230, dividing the internal space of the second grinding cylinder 230 into the second grinding chamber 230a and at least one diversion chamber 230b. The stirring device 250 is configured to stir the materials and grinding media within the second grinding chamber 230a.

[0044] Under the action of pressure, the material enters the second grinding chamber 230a from the second feed port 210 and mixes with the grinding medium in the second grinding chamber 230a. The material moves from bottom to top in the second grinding cylinder 230 under the action of pressure. The material to be ground with larger particle sizes is located at the lower part of the second grinding cylinder 230, and the material with smaller particle sizes after grinding is located at the upper part of the second grinding cylinder 230. As the material moves from bottom to top in the second grinding cylinder 230, the grinding medium moves downward under the action of its own gravity, and the material and the grinding medium form opposite movement directions. At the same time, the stirring device 250 stirs the material and the grinding medium in the second grinding chamber 230a. Therefore, most of the grinding medium is evenly mixed with the material under the action of pressure, gravity and the agitation of the stirring device 250. The material and the grinding medium come into high-frequency contact, making the grinding of the material by the grinding medium more sufficient and the grinding effect better. A small part of the grinding medium gradually deposits to the lower part of the second grinding chamber 230a under the action of gravity, making the grinding medium with a higher distribution density in the lower part of the second grinding chamber 230a. Another small part of the grinding medium is mixed in the material and is carried by the material to the upper part of the second grinding cylinder 230. The grinding medium carried upward by the material moves at a slower speed under the action of its own gravity and exerts a smaller extrusion force on the filter screen 240, so the filter screen 240 will not be worn. With the action of gravity, the grinding medium carried upward by the material gradually moves downward. Therefore, there is less grinding medium at the upper part of the second grinding cylinder 230, and the density is smaller, which will not block the filter screen 240. The grinding medium filtered by the filter screen 240 returns to the second grinding chamber 230a to mix with the material again and grind the material. The ground material passes through the filter screen 240 and enters the diversion chamber 230b. The diversion chamber 230b can accommodate a certain volume of material, providing a buffer space for the material entering the diversion chamber 230b, avoiding the ground material directly entering the second feed port 210 through the filter screen 240, and further avoiding excessive extrusion of the filter screen 240 by the material and damage to the filter screen 240.

[0045] When the above-mentioned grinder is used to grind natural asphalt mixed slurry or other materials in a fluid state, the second feed port 210 is located below the second discharge port 220, and the material moves from bottom to top under pressure. The fluid-state material has viscosity, and the solid grinding medium is less affected by the pressure in the second grinding cylinder 230. The grinding medium carried upward by the material is affected by the viscous force of the material. Under the combined action of gravity, compared with the upward movement speed of the material, the upward movement speed of the grinding medium is slower and the inertia is smaller, and the impact force on the filter screen 240 is small. Therefore, when the above-mentioned grinder is used to grind natural asphalt mixed slurry or other materials in a fluid state, placing the second feed port 210 below the second discharge port 220 can better reduce the wear and blockage of the filter screen 240 by the grinding medium, and basically all the grinding media can be blocked by the filter screen 240, so that all the grinding media can be in the second grinding cylinder 230 and will not be discharged from the second discharge port 220 along with the material.

[0046] In an embodiment of the present application, please refer to Figures 4 - 8 , the stirring device 250 includes a stirring shaft 251, a driving source 252 and a plurality of stirrers 253. The driving source 252 is used to drive the stirring shaft 251 to rotate. The stirrers 253 are arranged on the stirring shaft 251 and are located in the second grinding cavity 230a. Each stirrer 253 includes a mounting seat 2531, a plurality of stirring rods 2532 and a plurality of stirring blades 2533. The mounting seat 2531 has a hollow mounting channel 2531a. The plurality of stirring rods 2532 are arranged at intervals on the outer periphery of the mounting seat 2531. One end of each stirring rod 2532 is connected to the mounting seat 2531, and the other end of each stirring rod 2532 is connected to the corresponding stirring blade 2533. Each stirrer 253 is cooperatively installed with the stirring shaft 251 through the mounting channel 2531a.

[0047] By driving the driving source 252 to drive the stirring shaft 251 to rotate, the stirring shaft 251 drives the stirrers 253 to move. The stirrers 253 agitate the materials and grinding media in the second grinding cavity 230a, making the materials and grinding media mix more evenly and contact more frequently, so that the grinding of the materials by the grinding media is more sufficient and the grinding effect is better. A plurality of stirring rods 2532 and a plurality of stirring blades 2533 are arranged on the mounting seat 2531. The stirring blades 2533 are installed on the mounting seat 2531 through the stirring rods 2532. First, it is convenient to adjust the installation angle of the stirring blades 2533. Second, the stirring rods 2532 make the stirring blades 2533 closer to the side wall of the second grinding cavity 230a, with a wider stirring range. In addition, the stirring rods 2532 occupy less space than the stirring blades 2533. In the case of making the stirring blades 2533 closer to the side wall of the second grinding cavity 230a, the materials and grinding media have a larger accommodation space, making the stirring more sufficient and the mixing of the grinding media and materials more uniform.

[0048] In one embodiment of the present application, please refer to Figures 4 - 8 , the stirring blades 2533 of the stirrer 253 near one end of the stirring shaft 251 are configured to push the grinding medium towards the other end of the stirring shaft 251. For example, the stirring blades 2533 of the stirrer 253 near the upper end of the stirring shaft 251 are configured to push the grinding medium downward, or the stirring blades 2533 of the stirrer 253 near the lower end of the stirring shaft 251 are configured to push the grinding medium upward, or the stirring blades 2533 of the stirrer 253 near the upper end of the stirring shaft 251 are configured to push the grinding medium downward and the stirring blades 2533 of the stirrer 253 near the lower end of the stirring shaft 251 are configured to push the grinding medium upward at the same time. This design avoids excessive flow of the grinding medium to the upper or lower part of the second grinder 200, further avoids wear or blockage of the filter screen 240 by the grinding medium, makes the grinding medium more evenly distributed around the stirrer 253, and enables the grinding medium and the material to be fully contacted and ground within the range where the stirrer 253 is located.

[0049] Specifically, the material-facing surface 2533a of the stirring blades 2533 of the stirrer 253 near the upper end of the stirring shaft 251 is inclined upward, and the eddy current formed by the stirring blades 2533 drives the grinding medium downward. The material located in the upper part of the second grinding chamber 230a moves from bottom to top under the action of pressure. Since the particle size of the material near the upper end of the stirring shaft 251 is smaller after grinding and the grinding medium is relatively larger, due to the upward inclination of the material-facing surface 2533a, the stirring blades 2533 form a downward eddy current, driving the mixture of the solid grinding medium and the material downward. The solid grinding medium is less affected by the pressure in the second grinding cylinder 230. The grinding medium carried upward by the material moves upward more slowly and has less inertia under its own gravity compared to the upward movement speed of the material, and is more likely to move downward faster under the action of the eddy current. Although the material will also move downward under the action of the eddy current, compared with the grinding medium, due to the smaller particle size and lighter weight of the material, it is less affected by the downward driving of the eddy current, and the material still moves upward at a relatively fast speed. Therefore, the material located in the upper part of the second grinding chamber 230a continues to move from bottom to top under the action of pressure, while the grinding medium moves downward under the action of its own gravity and the eddy current, and the material and the grinding medium are gradually separated. The material-facing surface 2533a of the stirring blades 2533 of the stirrer 253 near the lower end of the stirring shaft 251 is inclined downward, and the stirring blades 2533 drive the grinding medium upward. The downward inclination of the material-facing surface 2533a forms an upward eddy current. The material located in the lower part of the second grinding chamber 230a moves from bottom to top under the action of pressure, and the grinding medium moves upward under the action of the eddy current and the material.

[0050] When the above-mentioned grinder is used to grind natural asphalt mixed slurry or other materials in a fluid state, the materials in a fluid state have viscosity. The solid grinding medium is less affected by the pressure in the second grinding cylinder 230, while the materials in a fluid state are more affected by the pressure in the second grinding cylinder 230. The grinding medium carried upward by the materials moves upward at a slower speed and has less inertia under the action of its own gravity compared to the upward movement speed of the materials. Therefore, the grinding medium located in the upper part of the second grinding cylinder 230 is more likely to move downward under the action of the downward eddy current. The grinding medium located in the lower part of the second grinding cylinder 230 moves upward under the action of the materials and the upward eddy current.

[0051] It can be understood that the stirrer 253 near one end of the stirring shaft 251 is configured to push the grinding medium towards the other end of the stirring shaft 251. One stirrer 253 can be provided, or two stirrers can be provided, or multiple stirrers can be provided, such as three, four, five, or six, etc.

[0052] The material-facing surface 2533a of the stirring blade 2533 refers to the surface of the stirring blade 2533 that forms an axial extrusion force on the materials along the rotation direction of the stirring shaft 251. Here, "axial extrusion of the materials along the stirring shaft" should be understood as having at least a component force for axially extruding the materials along the stirring shaft 251. For example, if the material-facing surface 2533a is inclined downward, the stirring blade 2533 forms an axial upward and radial outward extrusion component force on the materials along the stirring shaft 251; if the material-facing surface 2533a is inclined upward, the stirring blade 2533 forms an axial downward and radial outward extrusion component force on the materials along the stirring shaft 251.

[0053] In an embodiment of the present application, please refer to Figures 4 - 8 , the stirring blades 2533 of the stirrer 253 located between the two ends of the stirring shaft 251 are configured to purely rotate and push the grinding medium. With this design, it is avoided that the grinding medium moves upward or downward under the action of the stirrer 253 located between the two ends of the stirring shaft 251, so that the grinding medium and the materials are mixed together and repeatedly collide and rub against each other within the range of the above-mentioned stirrer 253, and the grinding medium and the materials are fully contacted and ground within the range where the stirrer 253 is located.

[0054] Specifically, the stirring blades 2533 of the stirrer 253 located between the two ends of the stirring shaft 251 are horizontally arranged, and the horizontally arranged stirring blades 2533 purely rotate and push the grinding medium.

[0055] In an embodiment of the present application, please refer to Figures 4 - 8, the number of stirring blades 2533 of the stirrers 253 at both ends of the stirring shaft 251 is more than that of the stirrers 253 between both ends of the stirring shaft 251. In this design, the more the number of stirring blades 2533 of the stirrers 253 at both ends of the stirring shaft 251, the denser the arrangement of the stirring blades 2533, the smaller the gap between the stirring blades 2533, and it is more difficult for the solid grinding medium to bypass the stirring blades 2533 and approach the upper or lower part of the second grinding chamber 230a. Further, it is avoided that too much grinding medium flows to the upper or lower part of the second grinder 200, so that the grinding medium forms a suspension state and can be more evenly distributed around the stirrer 253, improving the grinding efficiency of the material.

[0056] In an embodiment of the present application, please refer to Figures 4 - 8 , the stirring blades 2533 of two adjacent stirrers 253 are installed in alignment or stagger. Since the stirrers 253 are arranged on the stirring shaft 251, that is to say, two adjacent stirrers 253 are arranged vertically, and the stirring blades 2533 of the upper adjacent stirrer 253 and the stirring blades 2533 of the lower adjacent stirrer 253 are staggered from each other, so that the stirring range is wider and the stirring is more sufficient. In other embodiments, the stirring blades 2533 of two adjacent stirrers 253 can also be installed in alignment.

[0057] In an embodiment of the present application, please refer to Figure 4 and Figure 5 , the diversion chamber 230b is arranged around the upper part of the second grinding chamber 230a.

[0058] The diversion chamber 230b and the second grinding chamber 230a form a structure with a "T" - shaped cross - section. Since the filter screen 240 divides the internal space of the second grinding cylinder 230 into the second grinding chamber 230a and the diversion chamber 230b, and the diversion chamber 230b is arranged around the upper part of the second grinding chamber 230a, the filter screen 240 is annular. One end of the filter screen 240 is connected to the top wall of the diversion chamber 230b, and the other end of the filter screen 240 is connected to the side wall of the diversion chamber 230b. In this design, it can also make the filter screen 240 have a larger filtering area, better filter the grinding medium, so that all the grinding medium remains in the second grinding chamber 230a to continue grinding the material, facilitating the ground material in the second grinding chamber 230a to enter the diversion chamber 230b faster, avoiding material blockage of the filter screen 240, and improving the working efficiency of the grinder.

[0059] In another embodiment of the present application, please refer to Figure 4 and Figure 5, a diversion cavity 230b is arranged above the second grinding cavity. The diversion cavity 230b and the second grinding cavity 230a form a structure with a "T"-shaped cross-section. In other embodiments, the diversion cavity 230b and the second grinding cavity 230a may also form a cylindrical structure (not shown in the figure). Since the filter screen 240 divides the internal space of the second grinding cylinder 230 into the second grinding cavity 230a and the diversion cavity 230b, and the diversion cavity 230b is arranged above the second grinding cavity 230a, the filter screen 240 is planar, the outer periphery of the filter screen 240 is connected to the side wall of the second grinding cavity 230a, and the area of the filter screen 240 is equal to the cross-sectional area of the second grinding cavity 230a, so that the filter screen 240 has a larger filtering area, facilitating the ground material in the second grinding cavity 230a to enter the diversion cavity 230b faster and improving the working efficiency of the grinder.

[0060] To prevent the grinding medium from entering the diversion cavity 230b from the second grinding cavity 230a due to the wear or damage of a single layer of filter screen. In an embodiment of the present application, the filter screen 240 is arranged as a single layer or multiple layers. For example, the filter screen 240 can be arranged in two layers. The first layer of filter screen 241 is horizontally arranged in a planar shape, and the second layer of filter screen 242 is vertically arranged in a ring shape. The second layer of filter screen 242 divides the internal space of the second grinding cylinder 230 into the second grinding cavity 230a and the diversion cavity 230b. The first layer of filter screen 241 is located in the diversion cavity 230b and divides the diversion cavity 230b into two sub-diversion cavities. The diversion cavity 230b and the second grinding cavity 230a form a structure with a "T"-shaped cross-section. In other embodiments, the multiple layers of filter screen 240 can be one or more of horizontally arranged, inclined arranged and vertically arranged.

[0061] In another embodiment of the present application, please refer to Figure 1 , Figure 9 and Figure 10 , the grinding production line includes a separator 300. The separator 300 includes a separation cylinder 310 and a screen 320. The separation cylinder 310 includes a second separation cavity 310a, a separation inlet 310b and a separation outlet 310c communicating with the second separation cavity 310a. The screen 320 is arranged in the second separation cavity 310a. The screen 320 separates the separation inlet 310b from the separation outlet 310c. The second discharge port 220 is communicated with the separation inlet 310b.

[0062] In order to further prevent the grinding medium from being mixed in the material, the material ground by the second grinder 200 is discharged from the second discharge port 220 and enters the second separation chamber 310a from the separation inlet 310b. The screen 320 can separate a very small amount of grinding medium mixed in the ground material. After the material is purified in the separator 300, the material with higher purity is discharged from the separation outlet 310c of the separator 300, and a small amount of grinding medium left in the separator 300 can be recycled and reused.

[0063] In another embodiment of the present application, the first grinder 100 is a vertical grinder. Further, the first grinder 100 includes a first feed port, and the first feed port is located below the first discharge port 110. This design prevents the grinding medium from being discharged from the first discharge port 110 along with the material, and improves the utilization rate of the grinding medium.

[0064] The grinding medium in the embodiments of the present application can be one or several of spherical balls, truncated cones, columnar balls, short round rods, etc., and the material used for the grinding medium can be cast iron, alloy, alumina, silicon carbide, ceramic, etc.

[0065] It can be understood that when the above-mentioned first grinder and / or second grinder are used to grind the natural asphalt mixed slurry, it is necessary to heat the natural asphalt mixed slurry so that the natural asphalt mixed slurry remains a liquid with good fluidity at a certain temperature. Therefore, the first grinder and / or second grinder can also include a heat conduction device for heating the natural asphalt mixed slurry, and the heat conduction device is configured to transfer heat to the inside of the natural asphalt mixed slurry. The heat conduction device can also be a heat conduction pipe wound around the first grinding cylinder and / or the second grinding cylinder or a heat conduction cavity arranged between the cylinder walls of the first grinding cylinder or the second grinding cylinder. A high-temperature heat conduction substance flows in the heat conduction pipe or the heat conduction cavity, and the high-temperature heat conduction substance transfers heat to the natural asphalt mixed slurry to keep it in a liquid state.

[0066] It should be noted that the heat conduction substance is a high-temperature liquid that can transfer heat to the material, such as heat conduction oil, or other liquids used for heat conduction, as long as the high-temperature liquid in the heat conduction cavity can transfer heat to the material to maintain the temperature of the material.

[0067] It can be understood that the first grinder and / or second grinder provided in the embodiments 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.

[0068] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A grinding production line, characterized in that, the grinding production line is used for grinding natural asphalt mixed slurry, and includes a first grinding machine and a second grinding machine. The first grinding machine includes a first discharge port. The second grinding machine is a vertical grinding machine, which includes a second feed port and a second discharge port located above the second feed port. The first discharge port is communicated with the second feed port; The second grinding machine includes: a second grinding cylinder, in which a second grinding chamber and a diversion chamber are formed and communicated with each other. The second grinding chamber is used to accommodate materials and grinding media, and the diversion chamber is used to collect the materials ground by the grinding media. The second feed port is communicated with the second grinding chamber, and the second discharge port is communicated with the diversion chamber; a stirring device, including a stirring shaft and a plurality of stirrers. The stirrers are arranged on the stirring shaft and located in the second grinding chamber. Each stirrer includes a mounting seat, a plurality of stirring rods and a plurality of stirring blades. The plurality of stirring rods are arranged at intervals on the outer periphery of the mounting seat. One end of each stirring rod is connected to the mounting seat, and the other end of each stirring rod is connected to the corresponding stirring blade; the feeding surface of the stirring blade of the stirrer near the upper end of the stirring shaft is inclined upward; the feeding surface of the stirring blade of the stirrer near the lower end of the stirring shaft is inclined downward; the stirring blades of the stirrers located between the two ends of the stirring shaft are configured to purely rotate and push the grinding media; the number of the stirring blades of the stirrers located at the two ends of the stirring shaft is more than that of the stirring blades of the stirrers located between the two ends of the stirring shaft.

2. The grinding production line according to claim 1, characterized in that, the first grinding machine is a horizontal grinding machine, which includes a first grinding cylinder having a first grinding chamber and a separation mechanism having a first separation chamber. The first grinding chamber is used to accommodate materials and grinding media, and the separation mechanism is used to separate materials and grinding media. The separation mechanism is located in the first grinding chamber, and the first discharge port is communicated with the first separation chamber.

3. The grinding production line according to claim 2, characterized in that, the first grinding machine includes a grinding shaft arranged in the first grinding chamber and a dynamic separation wheel rotor arranged outside the separation mechanism. The dynamic separation wheel rotor includes a turntable connected to the end of the grinding shaft and a plurality of connecting rods distributed along the circumference of the turntable. One end of the connecting rod is connected to the turntable.

4. The grinding production line according to claim 1, characterized in that, the second grinding machine includes: a filter screen, which is arranged in the second grinding cylinder and divides the internal space of the second grinding cylinder into the second grinding chamber and at least one diversion chamber.

5. The grinding production line according to claim 4, characterized in that, the stirring device includes a driving source, which is used to drive the stirring shaft to rotate. The mounting seat has a hollow mounting channel, and each stirrer is cooperatively mounted with the stirring shaft through the mounting channel.

6. The grinding production line according to claim 5, wherein, the stirring blades of the stirrer at one end close to the stirring shaft are configured to push the grinding medium towards the other end of the stirring shaft; and / or, the stirring blades of two adjacent stirrers are installed in alignment or misalignment.

7. The grinding production line according to claim 4, wherein, the diversion chamber surrounds the upper part of the second grinding chamber; or, the diversion chamber is arranged above the second grinding chamber.

8. The grinding production line according to claim 4, wherein, the filter screen is arranged in a single layer or multiple layers.

9. The grinding production line according to claim 1, wherein, the grinding production line includes a separator, the separator includes a separation cylinder and a screen, the separation cylinder includes a second separation chamber and a separation inlet and a separation outlet communicating with the second separation chamber, the screen is arranged in the second separation chamber, the screen separates the separation inlet from the separation outlet, and the second discharge port communicates with the separation inlet.

10. The grinding production line according to claim 1, wherein, the first grinding machine is a vertical grinding machine.

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