Vertical grinding machine

Abstract

The present application provides a vertical grinding machine, which includes a grinding cylinder, grinding media, a stirring device, a supporting device and a positioning member. The grinding media is arranged in the grinding cylinder. The stirring device includes a stirring shaft and a driving source. The driving source is arranged at the upper part of the grinding cylinder. One end of the stirring shaft is connected to the driving source, and the other end of the stirring shaft is suspended in the grinding cylinder. The supporting device is arranged at the upper part of the grinding cylinder to support the stirring shaft. The positioning member is connected to the suspended end of the stirring shaft. At least part of the grinding media surrounds the periphery of the positioning member. The upper end of the stirring shaft is stabilized by the supporting device to prevent the upper end of the stirring shaft from shifting during rotation. The positioning member and part of the grinding media surrounding the periphery of the positioning member are used to prevent the lower end of the stirring shaft from shifting during rotation.

Description

Technical Field

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

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

[0003] The existing vertical grinding machine for grinding natural asphalt mixed slurry includes a cylinder body and a stirring shaft suspended inside the cylinder body. Since the stirring shaft is relatively long and one end located inside the cylinder body is suspended, the stirring shaft is prone to deviation during rotation, resulting in unstable rotation of the stirring shaft and affecting the grinding effect. Summary of the Invention

[0004] In view of this, the embodiments of the present application are expected to provide a vertical grinding machine to solve the technical problem that the stirring shaft is prone to deviation during rotation in the prior art, resulting in unstable rotation of the stirring shaft.

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

[0006] The embodiments of the present application provide a vertical grinding machine, including:

[0007] A grinding cylinder for accommodating materials and grinding media;

[0008] A stirring device including a stirring shaft and a driving source, the driving source is arranged outside the grinding cylinder, one end of the stirring shaft is connected to the driving source, and the other end of the stirring shaft is suspended inside the grinding cylinder;

[0009] A supporting device arranged at the upper part of the grinding cylinder to support the stirring shaft;

[0010] A positioning member connected to the suspended end of the stirring shaft.

[0011] Further, the stirring device includes a plurality of stirrers, 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, the other end of each stirring rod is connected to the corresponding stirring blade, and each stirrer is cooperatively installed with the stirring shaft through the mounting channel.

[0012] Furthermore, the bottom wall of the grinding cylinder is a flat surface, and each stirring rod is horizontal.

[0013] Furthermore, the distance between the stirring rod of the lowermost stirrer and the bottom wall of the grinding cylinder is A, where 20 cm ≤ A ≤ 50 cm;

[0014] and / or, the distance between the lowermost end of the positioning member and the bottom wall of the grinding cylinder is B, where 5 cm ≤ B ≤ 15 cm.

[0015] Furthermore, the stirring blade is detachably connected to the stirring rod;

[0016] and / or, the mounting seat is detachably connected to the stirring shaft, and the vertical grinder further includes a spacer disposed between two adjacent mounting seats.

[0017] Furthermore, the stirring blade of the stirrer near one end of the stirring shaft is configured to push the grinding medium toward the other end of the stirring shaft;

[0018] and / or, the stirring blade of the stirrer located between the two ends of the stirring shaft is configured to purely rotate and push the grinding medium;

[0019] and / or, the number of stirring blades of the stirrer located at the two ends of the stirring shaft is more than the number of stirring blades of the stirrer located between the two ends of the stirring shaft;

[0020] and / or, the stirring blades of two adjacent stirrers are staggeredly installed.

[0021] Furthermore, the positioning member is a cone, and the bottom surface of the cone is arranged upward;

[0022] or, the positioning member is a frustum of a cone, and the bottom surface of the frustum of the cone is arranged downward.

[0023] Furthermore, the positioning member is detachably connected to the stirring shaft.

[0024] Furthermore, the support device includes a bearing, a hollow sleeve, and a plurality of support rods. The bearing is arranged in the hollow sleeve. One end of the support rod is connected to the hollow sleeve, and the other end of the support rod is connected to the grinding cylinder. The stirring shaft is arranged in the bearing.

[0025] Furthermore, the bearing includes a first bearing and a second bearing. The first bearing is arranged in the upper part of the hollow sleeve, and the second bearing is arranged in the lower part of the hollow sleeve. The second bearing is a radial bearing.

[0026] The vertical grinder provided by the embodiment of the present application stabilizes the upper end of the stirring shaft through the supporting device to prevent the upper end of the stirring shaft from shifting during rotation. The positioning member is used to prevent the lower end of the stirring shaft from shifting during rotation. Since some of the grinding media will gradually settle to the bottom of the grinding cylinder under the action of gravity, that is to say, the quantity of the grinding media at the bottom of the grinding cylinder is denser than that at other positions of the grinding cylinder. The grinding media at least partially surrounds the periphery of the positioning member, and the relatively dense grinding media is used to limit the shift of the positioning member, strengthening the positioning effect of the positioning member and further preventing the lower end of the stirring shaft from shifting. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of a vertical grinder in an embodiment of the present application;

[0028] Figure 2 is Figure 1 a cross-sectional view taken along the C-C direction in

[0029] Figure 3 is Figure 2 a cross-sectional view taken along the D-D direction in

[0030] Figure 4 is a schematic structural diagram of a stirrer in an embodiment of the present application;

[0031] Figure 5 is a schematic structural diagram of a stirrer protective sleeve in an embodiment of the present application;

[0032] Figure 6 is a schematic structural diagram of another stirrer protective sleeve in an embodiment of the present application;

[0033] Figure 7 is a schematic structural diagram of a stirring device in an embodiment of the present application, wherein the driving source is not shown, the positioning member is shown, and the direction indicated by the arrow in the figure is the rotation direction of the stirring shaft.

[0034] Description of the Reference Numerals

[0035] Grinding cylinder 10; bottom wall 10a; convex ring 11; cylinder body 12; grinding media 20; stirring device 30; stirring shaft 31; driving source 32; stirrer 33; mounting seat 331; mounting channel 331a; stirring rod 332; stirring blade 333; protective sleeve 334; accommodating cavity 3341; upper protective sleeve 334a; lower protective sleeve 334b; upper housing 334a'; lower housing 334b'; supporting device 40; bearing 41; first bearing 411; second bearing 412; hollow sleeve 42; support rod 43; positioning member 50; feed inlet 60; discharge outlet 70; filter screen 80. Detailed Embodiments

[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 illustration of the purpose of the present application and should not be regarded as an improper limitation to the present application.

[0037] In the description of the present application, "cm" represents centimeter, and the orientation or positional relationship of "upper", "lower", "top", and "bottom" is based on the normal use state of the vertical grinding machine. As shown in the attached Figure 2 orientation or positional relationship, 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 cannot be understood as a limitation to the present application.

[0038] An embodiment of the present application provides a vertical grinding machine. Please refer to Figure 1 and Figure 2 , which includes: a grinding cylinder 10, a stirring device 30, a supporting device 40, and a positioning member 50. The grinding cylinder 10 is used to accommodate materials and grinding media 20. The stirring device 30 includes a stirring shaft 31 and a driving source 32. The driving source 32 is arranged outside the grinding cylinder 10. One end of the stirring shaft 31 is connected to the driving source 32, and the other end of the stirring shaft 31 is suspended in the grinding cylinder 10. The supporting device 40 is arranged at the upper part of the grinding cylinder 10 to support the stirring shaft 31. The positioning member 50 is connected to the suspended end of the stirring shaft 31 to reduce the offset of the stirring shaft 31 during rotation.

[0039] For the vertical grinding machine provided by the embodiment of the present application, the grinding cylinder is filled with grinding media and materials. The driving source drives the stirring shaft to rotate, and the rotation of the stirring shaft makes the materials and the grinding media move. The materials are ground to the required particle size under the repeated grinding action of the grinding media, and finally discharged from the discharge port of the grinding cylinder through a filter screen. The upper end of the stirring shaft is stabilized by the supporting device to prevent the upper end of the stirring shaft from offsetting during rotation, and the positioning member is used to prevent the lower end of the stirring shaft from offsetting during rotation.

[0040] Due to the action of gravity, a part of the grinding media will gradually settle to the bottom of the grinding cylinder. That is to say, the quantity of the grinding media at the bottom of the grinding cylinder is denser than that at other positions of the grinding cylinder. The un-stirred bottom grinding media remains relatively stationary. The grinding media at least partially surrounds the periphery of the positioning member, and the relatively dense grinding media is used to limit the offset of the positioning member, strengthen the positioning effect of the positioning member, and further prevent the lower end of the stirring shaft from offsetting.

[0041] When the above vertical grinding machine is used to grind natural asphalt mixed slurry or other materials in a fluid state, the materials in a fluid state are viscous, and the grinding media deposited at the bottom of the grinding chamber are bonded into a relatively stable whole, which is equivalent to providing a relatively stable "mounting seat" for the positioning member, further strengthening the positioning effect on the positioning member, and further reducing the deviation of the lower end of the stirring shaft.

[0042] In one embodiment of the present application, please refer to Figures 2 - 4 , the stirring device 30 includes a plurality of stirrers 33. Each stirrer 33 includes a mounting seat 331, a plurality of stirring rods 332 and a plurality of stirring blades 333. The mounting seat 331 has a hollow mounting channel 331a. The plurality of stirring rods 332 are arranged at intervals on the outer periphery of the mounting seat 331. One end of each stirring rod 332 is connected to the mounting seat 331, and the other end of each stirring rod 332 is connected to the corresponding stirring blade 333. Each stirrer 33 is cooperatively installed with the stirring shaft 31 through the mounting channel 331a.

[0043] A plurality of stirring rods and a plurality of stirring blades are arranged on the mounting seat. The stirring blades are installed on the mounting seat through the stirring rods. First, it is convenient to adjust the installation angle of the stirring blades. Second, the stirring rods make the stirring blades closer to the side wall of the grinding cylinder, and the stirring range is wider. In addition, the stirring rods occupy less space than the stirring blades. In the case of making the stirring blades closer to the inner wall of the grinding cylinder, the materials and the grinding media have a larger stirring space, making the stirring more sufficient and the mixing of the grinding media and the materials more uniform.

[0044] In one embodiment of the present application, please refer to Figure 4 , the mounting channel 331a is circular. The circular mounting channel is convenient for manufacturing and processing and is convenient for fitting and installing with the circular stirring shaft.

[0045] In other embodiments, the mounting channel is a polygonal structure, and the stirring shaft is cooperatively installed with the mounting channel. Specifically, if the mounting channel is a quadrilateral, hexagon or octagon structure, the installation part of the stirring shaft where the mounting channel is located is also a suitable quadrilateral, hexagon or octagon structure. This design, first, makes the stirrer and the stirring shaft assembled more firmly together. Second, it is convenient for the positioning and installation of the stirrer on the stirring shaft, and the radial limiting member for the stirrer can be omitted.

[0046] In one embodiment of the present application, the mounting seat 331 is an integrally formed ring. This design, first, is convenient for manufacturing. Second, the integrally formed mounting seat has better strength.

[0047] In other embodiments, the mounting base includes at least two mounting blocks, and the at least two mounting blocks are spliced to form a ring. With this structure, when the mounting base needs to be disassembled and repaired, it can be directly disassembled without having to disassemble other mounting bases or other components above or below the mounting base. For example, when the mounting base is formed by splicing two mounting blocks into a ring and the mounting base in the middle of the stirring shaft needs to be repaired and replaced, only the two mounting blocks need to be disassembled to replace the mounting base, instead of disassembling the positioning parts and other mounting bases below the mounting base one by one and then removing the mounting base, which is convenient and fast. In addition, with this design, the undamaged part of the mounting block can be reused, and only the damaged mounting block needs to be replaced with a new one.

[0048] In one embodiment of the present application, please refer to Figure 2 , the bottom wall 10a of the grinding cylinder 10 is a plane, and each stirring rod 332 is horizontal.

[0049] The stirring rod is horizontal. Firstly, it is convenient for manufacturing and processing. Secondly, it enables the stirring rod to be closer to the side wall of the grinding cylinder at the same length. That is, when the stirring rod is of the same length, the horizontal setting of the stirring rod is closer to the side wall of the grinding cylinder than the setting where the stirring rod forms a certain angle with the stirring shaft. Thirdly, it is convenient to maintain the structural stability of the stirring rod. Since the stirring shaft is in a rotating motion state, the stirring rod is not only subjected to the shearing force from the material and the grinding medium during the motion, but also subjected to the force from the stirring blade.

[0050] In one embodiment of the present application, please refer to Figure 2 , the distance between the stirring rod 332 of the lowermost stirrer 33 and the bottom wall 10a of the grinding cylinder 10 is A, where 20 cm ≤ A ≤ 50 cm.

[0051] Since the bottom wall of the grinding cylinder is a plane and 20 cm ≤ A ≤ 50 cm, on the one hand, if A is too small, the lowermost stirring rod and the stirring blade are too close to the bottom wall of the grinding cylinder. Firstly, it is easy to scratch the bottom wall. Secondly, in the embodiment of the present application, the grinding medium deposited on the bottom wall of the grinding cylinder is used to prevent the positioning part from shifting, and it is necessary to avoid the stirring rod and the stirring blade from stirring up the grinding medium on the bottom wall of the grinding cylinder. On the other hand, if A is too large, the lowermost stirring rod and the stirring blade are too far from the bottom wall of the grinding cylinder, and the material between the lowermost stirring rod and the stirring blade and the grinding medium on the bottom wall of the grinding cylinder cannot be sufficiently stirred and ground, affecting the grinding effect. Therefore, 20 cm ≤ A ≤ 50 cm, such as 20 cm, 22 cm, 25 cm, 30 cm, 35 cm, 40 cm, 45 cm, 50 cm, can not only maintain a good grinding effect, avoid the lowermost stirring rod and the stirring blade from scratching the bottom wall, but also avoid the stirring rod and the stirring blade from stirring up the grinding medium on the bottom wall of the grinding cylinder and affecting the positioning effect of the positioning part.

[0052] In one embodiment of the present application, please refer to Figure 2The distance between the lowermost end of the positioning member 50 and the bottom wall 10a of the grinding cylinder 10 is B, where 5 cm ≤ B ≤ 15 cm.

[0053] Since the bottom wall of the grinding cylinder is a flat surface and 5 cm ≤ B ≤ 15 cm, on the one hand, if B is too small, the lowermost end of the positioning member is too close to the bottom wall of the grinding cylinder, which is likely to scratch the bottom wall. On the other hand, if B is too large, the lowermost end of the positioning member is too far from the bottom wall of the grinding cylinder, then the positioning member is too far from the grinding medium deposited on the bottom wall of the grinding cylinder, and the positioning effect of the grinding medium on the bottom wall of the grinding cylinder on the positioning member is poor, affecting the positioning effect of the positioning member. Therefore, 5 cm ≤ B ≤ 15 cm. For example, 5 cm, 6 cm, 10 cm, 12 cm, 13 cm, 14 cm, 15 cm can not only avoid the lowermost end of the positioning member from scratching the bottom wall, but also avoid the positioning member from being too far from the grinding medium deposited on the bottom wall of the grinding cylinder, and the positioning effect of the grinding medium on the bottom wall of the grinding cylinder on the positioning member is poor.

[0054] It can be understood that in other embodiments, the bottom wall 10a of the grinding cylinder 10 can also be selected as a non-planar surface, such as a conical shape, a frustum shape or other structures with a guiding inclined surface that are convenient for discharging the grinding medium. The positioning member can be located within the conical shape, the frustum shape or other structures with a guiding inclined surface that are convenient for discharging the grinding medium. Each stirring rod 332 can also be selected to be designed at an angle with the horizontal plane according to different stirring requirements, or a part of the stirring rods 332 are horizontal and the other part is designed at an angle with the horizontal plane.

[0055] In an embodiment of the present application, please refer to Figure 5 and Figure 6 , the stirrer 33 further includes a protective sleeve 334, and the protective sleeve 334 is configured to surround the outside of the stirring rod.

[0056] Protecting the stirring rod through the protective sleeve, firstly, it can avoid the wear of the stirring rod by the material or the grinding medium. Secondly, it can strengthen the support of the stirring rod and avoid the deformation of the stirring rod under the action of the shear force of the material and the grinding medium and the force of the stirring blade.

[0057] In an embodiment of the present application, please refer to Figure 5 , the protective sleeve 334 includes an upper protective sleeve 334a and a lower protective sleeve 334b, and the upper protective sleeve 334a and the lower protective sleeve 334b cooperate to form a plurality of accommodating cavities 3341 for accommodating the stirring rods 332.

[0058] Adopting the method of the upper protective sleeve and the lower protective sleeve makes the installation more convenient. For example, during installation, only by fitting and installing the upper protective sleeve and the lower protective sleeve, the installation of the protective sleeves for all the stirring rods on each stirrer can be completed.

[0059] In another embodiment of the present application, please refer to Figure 6, the number of protective sleeves 334 corresponds to the number of stirring rods 332. Each protective sleeve 334 includes an upper housing 334a' and a lower housing 334b'. The upper housing 334a' and the lower housing 334b' cooperate to form a receiving cavity 3341 for receiving the stirring rod 332, that is, it is installed outside the corresponding stirring rod 332.

[0060] The protective sleeve with an upper housing and a lower housing can replace the protective sleeve that needs to be replaced, and the cost is lower. For example, if a certain protective sleeve on a stirrer needs to be replaced, only the protective sleeve needs to be replaced with a new one, instead of replacing all the protective sleeves of the stirring rods on the mounting base.

[0061] It can be understood that the cross-section of the stirring rod 332 can be circular, elliptical, polygonal or irregular. The length direction of the stirring rod 332 can be of the same cross-section or variable cross-section.

[0062] In an embodiment of the present application, please refer to Figure 4 , the stirring blade 333 is detachably connected to the stirring rod 332. Since the stirring blade is a consumable part, during use, due to continuous friction and collision between the material and the grinding medium, the stirring blade may be deformed or damaged. By using a detachable connection, it is possible to avoid replacing the entire stirrer, which is not only convenient for replacing the stirring blade but also can save costs. In addition, the other end of each stirring rod is detachably connected to the corresponding stirring blade, which is also convenient for adjusting the installation angle and installation position of the stirring blade according to the specific use situation and actual needs.

[0063] In an embodiment of the present application, please refer to Figure 2 , the mounting base 331 is detachably connected to the stirring shaft 31. The detachable connection can be in the form of key connection such as flat key and spline, or in the form of screw connection and pin connection, such as threaded connection and bolt fastening connection.

[0064] The detachable connection between the mounting base and the stirring shaft can avoid the need to disassemble and repair the entire stirring device due to the damage of the mounting base during use. It can not only replace the mounting base conveniently and quickly, but also save costs and reduce the maintenance time.

[0065] Furthermore, the vertical grinder further includes a spacer (not shown) disposed between two adjacent mounting bases.

[0066] When the material is natural asphalt mixed slurry, since the natural asphalt mixed slurry is likely to coagulate on the mounting base, by providing a spacer between two adjacent mounting bases, it is possible to prevent the two adjacent mounting bases from sticking directly together, which is not convenient for disassembling the mounting base. For example, when using external force to damage the adhesive layer, it may damage the mounting base that does not need to be replaced. By providing a spacer, the mounting base can be quickly disassembled.

[0067] In one embodiment of the present application, a protruding portion is formed at one end of the stirring blade close to the stirring rod. The stirring blade has a guiding inclined surface facing the advancing side. The protruding portion is located on one side of the guiding inclined surface, and the stirring rod is located on the side of the second protruding portion away from the guiding inclined surface. The stirring rod is connected to the second protruding portion. During the stirring process, the stirring blade is subjected to a large force. With the above structure, when installing and connecting the stirring blade and the stirring rod, the second protruding portion of the connecting and installing part is arranged on one side of the guiding inclined surface of the stirring blade. Not only does the connecting part of the stirring blade play a fixing role, but also the end of the stirring rod plays a supporting role, enabling the stirring blade to withstand greater stress, playing a better supporting and protecting role, and avoiding breakage during operation.

[0068] In one embodiment of the present application, please refer to Figure 2 and Figure 7 , the stirring blade 333 of the stirrer 33 near one end of the stirring shaft 31 is configured to push the grinding medium 20 towards the other end of the stirring shaft 31. For example, the blade 333 of the stirrer 33 near the upper end of the stirring shaft 31 is configured to push the grinding medium 20 downward, or the blade 333 of the stirrer 33 near the lower end of the stirring shaft 31 is configured to push the grinding medium 20 upward, or simultaneously the blade 333 of the stirrer 33 near the upper end of the stirring shaft 31 is configured to push the grinding medium 20 downward and the blade 333 of the stirrer 33 near the lower end of the stirring shaft 31 is configured to push the grinding medium 20 upward.

[0069] This design avoids excessive flow of the grinding medium to the top or bottom of the vertical grinder, making the grinding medium more evenly distributed around the stirrer, and enabling the grinding medium and the material to be fully contacted and ground within the range where the stirrer is located.

[0070] Specifically, in one embodiment, if the material is fed from the lower end and discharged from the upper end, the feeding surface of the stirring blades of the stirrer near the upper end of the stirring shaft is inclined upward. The eddy current formed by the stirring blades drives the grinding medium downward. Since the material after grinding has a smaller particle size near the upper end of the stirring shaft, the material with a smaller particle size is mixed with the grinding medium. Under the high-pressure state of the grinding cylinder, the mixture of the material with a smaller particle size and the grinding medium is continuously driven upward. The grinding medium contacts the stirring blades near the upper end of the stirring shaft, and the stirring blades near the upper end of the stirring shaft drive the grinding medium downward. Although the material with a smaller particle size will also move downward under the drive of the stirring blades near the upper end of the stirring shaft, compared with the grinding medium, the material with a smaller particle size is more likely to bypass the stirring blades and move upward. Therefore, the material with a smaller particle size is gradually separated from the grinding medium, the material moves upward along the stirring shaft, and the grinding medium moves downward. The feeding surface of the stirring blades of the stirrer near the lower end of the stirring shaft is inclined downward, and the stirring blades drive the grinding medium upward. The eddy current formed by the stirring blades continuously drives the mixture upward, and the grinding medium is continuously driven upward by the stirring blades of the stirrer near the lower end of the stirring shaft, reducing the amount of the grinding medium deposited at the bottom of the grinding cylinder.

[0071] Specifically, in another embodiment, if the material is fed from the upper end and discharged from the lower end, the feeding surface of the stirring blades of the stirrer near the upper end of the stirring shaft is inclined upward. The eddy current formed by the stirring blades drives the grinding medium downward. Due to the gravitational force of the grinding medium and the eddy current formed by the stirring blades, the grinding medium is driven downward. Since the material is fed from the upper end, the movement direction of the material is also downward. The feeding surface of the stirring blades of the stirrer near the lower end of the stirring shaft is inclined downward, and the eddy current formed by the stirring blades continuously drives the mixture upward. The material located in the middle and lower parts of the grinding cylinder is ground into material with a smaller particle size. Under the high-pressure state in the grinding cylinder, the mixture of the material with a smaller particle size and the grinding medium is continuously driven downward. The grinding medium contacts the stirring blades near the lower end of the stirring shaft, and the stirring blades near the lower end of the stirring shaft drive the grinding medium upward. Although the material with a smaller particle size will also move upward under the drive of the stirring blades near the lower end of the stirring shaft, compared with the grinding medium, due to its smaller particle size, it is easy to bypass the stirring blades and move downward. Therefore, the material is gradually separated from the grinding medium, the material moves downward, and the grinding medium moves upward.

[0072] It can be understood that the stirrer at one end near the stirring shaft is configured to push the grinding medium towards the other end of the stirring shaft. One stirrer can be set, or two stirrers can be set, or multiple stirrers can be set, such as three, four, or five.

[0073] The material-facing surface of the stirring blade refers to the surface of the stirring blade that forms an axial extrusion force on the material along the axial direction of the stirring shaft as it rotates along the stirring shaft. Here, "axial extrusion of the material along the stirring shaft" should be understood to mean that there is at least a component force for axially extruding the material along the stirring shaft. For example, if the material-facing surface is inclined downward, the stirring blade forms an upward axial and outward radial extrusion force on the material towards the stirring shaft; if the material-facing surface is inclined upward, the stirring blade forms a downward axial and outward radial extrusion force on the material towards the stirring shaft.

[0074] In one embodiment of the present application, please refer to Figure 2 and Figure 7 , the stirring blades 333 of the stirrer 33 located between the two ends of the stirring shaft 31 are configured to purely rotate and push the grinding medium 20. This design avoids the upward or downward movement of the grinding medium under the action of the stirrer located between the two ends of the stirring shaft, enabling the grinding medium and the material to mix and repeatedly collide and rub against each other within the range of the above-mentioned stirrer, and ensuring that the grinding medium and the material are in full contact and grinding within the range where the stirrer is located.

[0075] Specifically, the stirring blades of the stirrer located between the two ends of the stirring shaft are horizontally arranged, and the horizontally arranged stirring blades purely rotate and push the grinding medium.

[0076] In one embodiment of the present application, the number of stirring blades of the stirrers located at the two ends of the stirring shaft is more than the number of stirring blades of the stirrer located between the two ends of the stirring shaft. With this design, the more the number of stirring blades of the stirrers located at the two ends of the stirring shaft, the denser the arrangement of the stirring blades, the smaller the gap between the stirring blades, the less affected the fluid-like material is, and the more difficult it is for the solid grinding medium to enter the two ends of the stirring shaft through the stirring blades, further preventing the excessive flow of the grinding medium to the top or bottom of the vertical grinder, enabling the grinding medium to form a suspended state, being more evenly distributed around the stirrer, and improving the grinding efficiency of the material.

[0077] In one embodiment of the present application, please refer to Figure 2 , Figure 3 and Figure 7 , the stirring blades 333 of two adjacent stirrers 33 are installed in a staggered manner. That is to say, since the stirrers are arranged on the stirring shaft, the two adjacent stirrers are arranged vertically, and the stirring blades of the upper adjacent stirrer are staggered from the stirring blades of the lower adjacent stirrer, resulting in a wider stirring range and more thorough stirring.

[0078] It can be understood that multiple stirring rods can be provided on one mounting seat, which can be 3, 4, 5, 6, 7, or even more. The multiple stirring rods are arranged at intervals on the outer periphery of the mounting seat, that is, the stirring rods arranged on the same stirrer are installed at an angle to each other, resulting in a wider stirring range and more thorough stirring.

[0079] In one embodiment of the present application, please refer to Figure 2 , the positioning member 50 is a cone, and the bottom surface of the cone is arranged upward.

[0080] The conical positioning member has a good centering effect. The bottom surface of the cone is arranged upward, and the contact area with the stirring shaft is large, which is convenient for installation.

[0081] In one embodiment of the present application, please refer to Figure 2 , the positioning member 50 is a frustum of a cone, and the bottom surface of the frustum of the cone is arranged downward.

[0082] The bottom surface of the frustum of the cone is arranged downward, which not only ensures a relatively large contact surface with the stirring shaft and is convenient for installation, but also enables the grinding medium deposited at the bottom to exert a downward force on the peripheral surface of the positioning member, resulting in a better positioning effect.

[0083] In one embodiment of the present application, please refer to Figure 2 , the positioning member 50 is detachably connected to the stirring shaft 31. For example, it is a threaded connection, a pin hole connection or a keyway connection. This design has two advantages. First, it is convenient to replace and repair the positioning member or the stirring shaft. Second, it is convenient to load and unload the stirrer. Since the stirring shaft and the stirrer are relatively heavy, the stirring shaft can be installed first, and then the stirrer can be loaded one by one from the lower end of the stirring shaft, and finally the positioning member is installed. When the stirrer needs to be disassembled later, the positioning member can be disassembled and the stirrer can be removed from the lower end of the stirring shaft, reducing the inconvenience of disassembling the stirrer from the upper end and saving costs.

[0084] In one embodiment of the present application, please refer to Figure 2 , the support device 40 includes a bearing 41, a hollow sleeve 42 and a plurality of support rods 43. The bearing 41 is arranged in the hollow sleeve 42. One end of the support rod 43 is connected to the hollow sleeve 42, and the other end of the support rod 43 is connected to the grinding cylinder 10. The stirring shaft 31 is arranged in the bearing 41.

[0085] The bearing is used to support the stirring shaft and reduce the friction coefficient during the movement of the stirring shaft. The bearing is arranged in the hollow sleeve, and the displacement of the bearing is restricted by the hollow sleeve, thereby avoiding the deviation of the stirring shaft. The support of the hollow sleeve is strengthened by the support rod.

[0086] In one embodiment of the present application, please refer to Figure 2 , the bearing 41 includes a first bearing 411 and a second bearing 412. The first bearing 411 is arranged at the upper part of the hollow sleeve 42, and the second bearing 412 is arranged at the lower part of the hollow sleeve 42. The second bearing 412 is a radial bearing.

[0087] The second bearing is a radial bearing for bearing radial loads and avoiding the deviation of the stirring shaft.

[0088] In one embodiment of the present application, please refer to Figure 1 andFigure 2 , the vertical grinding machine includes a feed inlet 60 located below the grinding cylinder, a discharge outlet 70 located above the grinding cylinder, and a filter screen 80.

[0089] The feed inlet, the grinding cylinder, and the discharge outlet are interconnected, and the filter screen is arranged at the connection between the grinding cylinder and the discharge outlet. Materials enter the grinding cylinder from the feed inlet located below the grinding cylinder, are ground by the grinding medium to the required particle size, and are discharged from the discharge outlet after passing through the filter screen. The mixture of the grinding medium and the materials in the grinding cylinder moves downward under the action of gravity. By adopting the method of feeding from below and discharging from above, the new materials move from bottom to top, which is convenient for the grinding medium and the materials to rub against each other reciprocally and speeds up the grinding speed of the materials.

[0090] In one embodiment of the present application, please refer to Figure 1 and Figure 2 , the grinding cylinder 10 includes a convex ring 11 and a cylinder body 12 located below the convex ring 11. The cross-sectional area of the convex ring 11 is larger than that of the cylinder body 12. The convex ring 11 and the cylinder body 12 are interconnected. The discharge outlet 70 is located on the convex ring 11, the feed inlet 60 is located on the cylinder body 12, and the stirrer 33 is located inside the cylinder body 12. By adopting this structure, the materials have a larger accommodation space in the convex ring, which is convenient for the materials to be discharged from the discharge outlet with sufficient time.

[0091] The grinding medium in the embodiment of the present application can be one or several of spherical balls, truncated cones, columnar balls, short round rods, etc. The materials used for the grinding medium can be cast iron, alloy, alumina, silicon carbide, ceramics, etc.

[0092] It can be understood that when the above-mentioned grinding machine is used to grind the natural asphalt mixed slurry, it is necessary to heat the grinding cylinder so that the natural asphalt mixed slurry remains a viscous liquid at a certain temperature. Therefore, the grinding machine can also include a heat conduction device for heating the grinding cylinder, and the heat conduction device is configured to transfer heat to the inside of the grinding cylinder. The heat conduction device can also be a heat conduction oil pipe wound around the outside of the grinding cylinder or a heat conduction oil cavity arranged between the cylinder walls of the grinding cylinder. High-temperature heat conduction oil flows in the heat conduction oil pipe or the heat conduction oil cavity, and the high-temperature heat conduction oil transfers heat to the natural asphalt mixed slurry to keep it in a liquid state.

[0093] It can be understood that the grinding machine provided in the embodiment of the present application can also be used for other materials that need to be ground, including other materials that need to be ground by heating.

[0094] 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 vertical grinding machine, characterized in that, The vertical grinding machine is used for grinding materials in a fluid state and includes: A grinding cylinder for accommodating the materials and the grinding medium; A stirring device including a stirring shaft and a driving source. The driving source is arranged outside the grinding cylinder. One end of the stirring shaft is connected to the driving source, and the other end of the stirring shaft is suspended in the grinding cylinder; A supporting device arranged at the upper part of the grinding cylinder to support the stirring shaft; A positioning member connected to the suspended end of the stirring shaft; The stirring device includes a plurality of stirrers. Each stirrer includes a plurality of stirring blades. The stirring blades of the stirrer near the upper end of the stirring shaft are configured to push the grinding medium downward, and the stirring blades of the stirrer near the lower end of the stirring shaft are configured to push the grinding medium upward; the stirring blades of the stirrer located between the two ends of the stirring shaft are configured to purely rotate and push the grinding medium; 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; Wherein, the feeding surface of the stirring blades of the stirrer near the upper end of the stirring shaft is inclined upward, and the feeding surface of the stirring blades of the stirrer near the lower end of the stirring shaft is inclined downward.

2. The vertical grinding machine according to claim 1, characterized in that, Each stirrer includes a mounting seat and a plurality of stirring rods. 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 mounted with the stirring shaft through the mounting channel.

3. The vertical grinding machine according to claim 2, wherein, The bottom wall of the grinding cylinder is a plane, and each stirring rod is horizontal.

4. The vertical grinding machine according to claim 3, characterized in that, The distance between the stirring rod of the lowermost stirrer and the bottom wall of the grinding cylinder is A, where 20 cm ≤ A ≤ 50 cm; And / or, the distance between the lowermost end of the positioning member and the bottom wall of the grinding cylinder is B, where 5 cm ≤ B ≤ 15 cm.

5. The vertical grinding machine according to claim 2, wherein, The stirring blade is detachably connected to the stirring rod; And / or, the mounting seat is detachably connected to the stirring shaft. The vertical grinding machine further includes a spacer arranged between two adjacent mounting seats.

6. The vertical grinding machine according to claim 2, characterized in that, The stirring blades of two adjacent stirrers are stagger-mounted.

7. The vertical grinding machine according to claim 1, wherein, The positioning member is a cone, and the bottom surface of the cone is arranged upward; Or, the positioning member is a frustum of a cone, and the bottom surface of the frustum of the cone is arranged downward.

8. The vertical grinding machine according to claim 1, wherein, The positioning member is detachably connected to the stirring shaft.

9. The vertical grinding machine according to any one of claims 1 to 8, characterized in that, The supporting device includes a bearing, a hollow sleeve and a plurality of supporting rods. The bearing is arranged in the hollow sleeve. One end of the supporting rod is connected to the hollow sleeve, and the other end of the supporting rod is connected to the grinding cylinder. The stirring shaft is arranged in the bearing.

10. The grinding machine according to claim 9, characterized in that, The bearing includes a first bearing and a second bearing. The first bearing is arranged at the upper part of the hollow sleeve, and the second bearing is arranged at the lower part of the hollow sleeve. The second bearing is a radial bearing.

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