CN112221615A

CN112221615A - Vertical grinder

Info

Publication number: CN112221615A
Application number: CN201910581647.0A
Authority: CN
Inventors: 唐志鹏; 李俊斌
Original assignee: Xi'an Zhongli Asphalt Co ltd
Current assignee: Xi'an Zhongli Asphalt Co ltd
Priority date: 2019-06-30
Filing date: 2019-06-30
Publication date: 2021-01-15

Abstract

The application provides a vertical grinding machine, which comprises a grinding cylinder, a feeding hole, a discharging hole, a filter screen and a stirring device, wherein a grinding cavity and a flow guide cavity which are communicated with each other are formed in the grinding cylinder, the grinding cavity is used for accommodating materials and grinding media, and the flow guide cavity is used for collecting the materials ground by the grinding media; the feed inlet is arranged at the lower part of the grinding cylinder and is communicated with the accommodating cavity; the discharge hole is arranged at the upper part of the grinding cylinder and is communicated with the flow guide cavity; the filter screen is arranged in the grinding cylinder and divides the internal space of the grinding cylinder into the grinding cavity and at least one flow guide cavity; the stirring device is configured to stir the materials in the grinding cavity and the grinding media; the material is followed the feed inlet gets into grind the intracavity, the grinding medium grinds the material, and the material after grinding is through the filter screen is gathered to the water conservancy diversion chamber after follow the discharge gate is discharged.

Description

Vertical grinder

Technical Field

The application relates to the technical field of material grinding, in particular to a vertical grinding machine.

Background

The natural asphalt is also called asphalt or mineral asphalt, wherein light components are evaporated, and then are polymerized by oxygen in the air under the irradiation of sunlight to form the mineral asphalt, which mainly comprises colloids such as asphaltene and resin, and a small amount of other mineral impurities such as metal and nonmetal. The natural asphalt raw ore is pulverized, ground, and then a processing liquid is added to the ground asphalt powder to form a natural asphalt mixture slurry.

The existing vertical grinding machine for grinding natural asphalt comprises a grinding cylinder, a feed inlet communicated with the upper part of the grinding cylinder, a discharge outlet communicated with the lower part of the grinding cylinder and a filter screen arranged at the discharge outlet, wherein natural asphalt mixed slurry enters the grinding cylinder from the feed inlet under pressure, grinding media such as steel balls in the grinding cylinder grind natural asphalt particles to required particle size, and the natural asphalt mixed slurry ground by the grinding media is discharged from the discharge outlet after passing through the filter screen. Because the natural asphalt mixed slurry at the discharge port is fed under pressure, and the grinding medium moves downwards under the action of gravity, the grinding medium is deposited on the lower part of the grinding cylinder more and more along with the action of the natural asphalt mixed slurry and the gravity, and the excessive grinding medium is easy to wear or block a filter screen at the discharge port.

Disclosure of Invention

In view of the above, embodiments of the present application are intended to provide a vertical mill to solve the technical problem in the prior art that excessive grinding media are prone to wear or block the filter screen at the discharge port.

In order to achieve the purpose, the technical scheme of the application is realized as follows:

the embodiment of the application provides a vertical grinding machine, includes:

the grinding device comprises a grinding cylinder, a grinding cavity and a flow guide cavity, wherein the grinding cavity and the flow guide cavity are communicated with each other, the grinding cavity is used for accommodating materials and grinding media, and the flow guide cavity is used for collecting the materials ground by the grinding media;

the feed inlet is arranged at the lower part of the grinding cylinder and is communicated with the accommodating cavity;

the discharge port is arranged at the upper part of the grinding cylinder and is communicated with the flow guide cavity;

the filter screen is arranged in the grinding cylinder and divides the internal space of the grinding cylinder into the grinding cavity and at least one flow guide cavity;

a stirring device configured to stir the material and the grinding media within the grinding chamber;

the material is followed the feed inlet gets into grind the intracavity, the grinding medium grinds the material, and the material after grinding is through the filter screen is gathered to the water conservancy diversion chamber after follow the discharge gate is discharged.

Further, agitating unit includes (mixing) shaft, driving source and a plurality of agitator, the driving source set up in the grinding vessel is outside, the one end of (mixing) shaft with the driving source is connected, the other end suspension of (mixing) shaft in grind the intracavity, the agitator set up in on the (mixing) shaft and be located grind the intracavity.

Further, every the agitator includes mount pad, a plurality of puddler and a plurality of stirring vane, the mount pad has hollow installation passageway, and is a plurality of the puddler interval sets up the periphery of mount pad, every the one end of puddler with the mount pad is connected, every the other end of puddler with correspond stirring vane is connected, every the agitator pass through the installation passageway with the (mixing) shaft cooperation installation.

Further, the stirring blades of the stirrer near one end of the stirring shaft are configured to push the grinding media toward the other end of the stirring shaft;

and/or the stirring blades of the stirrer between the two ends of the stirring shaft are configured to purely rotationally push the grinding media;

and/or the number of the stirring blades of the stirrer positioned at the two ends of the stirring shaft is more than that of the stirring blades of the stirrer positioned between the two ends of the stirring shaft;

and/or the stirring blades of two adjacent stirrers are arranged in alignment or in dislocation.

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

Further, the diversion cavity is arranged at the upper part of the grinding cavity in a surrounding manner;

or the diversion cavity is arranged above the grinding cavity.

Furthermore, the vertical grinding machine also comprises a positioning piece, and the positioning piece is connected with one end of the stirring shaft suspension.

Further, the vertical mill further comprises a plurality of wear-resistant liners, each wear-resistant liner comprises a plurality of protrusions facing the inside of the grinding chamber, and the plurality of wear-resistant liners cover the inner wall of the grinding cylinder.

Further, the vertical grinder further includes a heat conduction device configured to conduct heat to the inside of the grinding cylinder.

Furthermore, the grinding cylinder comprises an outer cylinder body and an inner cylinder body which are arranged at intervals, the heat conduction device comprises a heat conduction cavity formed between the outer cylinder body and the inner cylinder body and a flow guide rib arranged in the heat conduction cavity, the outer cylinder body is provided with an oil inlet and an oil outlet which are respectively communicated with the heat conduction cavity, and the flow guide rib is configured in such a way that heat conduction oil circularly flows from the oil inlet to the oil outlet along the circumferential direction of the inner cylinder body;

or, the grinding cylinder comprises an outer cylinder body and an inner cylinder body which are arranged in a clinging manner, the heat conduction device comprises a diversion trench formed in the inner side wall of the outer cylinder body and/or the outer side wall of the inner cylinder body, an oil inlet and an oil outlet which are respectively communicated with the diversion trench are formed in the outer cylinder body, and the diversion trench is configured to conduct heat oil to flow from the oil inlet to the oil outlet along the circumferential direction of the inner cylinder body in a spiral manner.

The vertical mill that this application embodiment provided, through setting up the feed inlet in the lower part of grinding vessel, the discharge gate sets up the upper portion at the grinding vessel, and the filter screen sets up in the grinding vessel, separates the grinding vessel inner space for grinding chamber and at least one water conservancy diversion chamber, feed inlet and grinding chamber intercommunication, discharge gate and water conservancy diversion chamber intercommunication, therefore the filter screen is in grinding chamber upper portion position, avoids depositing in the grinding medium of grinding vessel lower part to cause wearing and tearing or jam to the filter screen. Hold the material of certain volume through the water conservancy diversion chamber for the material that gets into the water conservancy diversion chamber has a buffer space, avoids the material after the grinding directly to get into the upper portion discharge gate that sets up at the grinding vessel through the filter screen, avoids the material to the excessive extrusion that causes of filter screen, and the filter screen is damaged.

Drawings

FIG. 1 is a schematic structural diagram of a vertical grinder according to an embodiment of the present application;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 4 is a schematic structural diagram of an agitator according to an embodiment of the present application;

FIG. 5 is a schematic view of another vertical grinder according to the embodiment of the present application;

fig. 6 is a schematic structural diagram of a stirring apparatus according to an embodiment of the present application, in which a driving source is not shown, a positioning member is shown, and a direction indicated by an arrow in the drawing is a rotation direction of a stirring shaft;

FIG. 7 is a schematic view of a wear liner according to an embodiment of the present application;

FIG. 8 is a partial cross-sectional view of a polishing liner and polishing cartridge in a vertical polishing machine according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a heat conducting device according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of another heat conducting device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of another heat conducting device according to an embodiment of the present application.

Description of the reference numerals

A grinding cylinder 10; a grinding chamber 10 a; a diversion cavity 10 b; an outer cylinder 11; an oil inlet 11 a; an oil outlet 11 b; an inner cylinder 12; a flow guide rib 13; a diversion trench 13'; a feed port 20; a discharge port 30; a filter screen 40; a first filter 41; second filter 42; a stirring device 50; a stirring shaft 51; a drive source 52; a stirrer 53; a mounting base 531; a mounting channel 531 a; a stirring rod 532; a stirring blade 533; material facing surface 533 a; grinding media 60; a positioning member 70; a wear resistant lining 80; a projection 81; a counterbore 82; the first end surface 82 a; a thermally conductive assembly 90; a heat conduction cavity 90 a; a connecting member 100; a second end face 100 a.

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

In the description of the present application, the "up", "down", "top", "bottom" orientation or positional relationship is based on the normal use of the vertical grinding machine, as shown in fig. 2, it being understood that such orientation terms are merely for convenience in describing the present application and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present application.

The embodiment of the present application provides a vertical grinder, please refer to fig. 1 and 2, including a grinding cylinder 10, a feeding port 20, a discharging port 30, a filter screen 40 and a stirring device 50, wherein a grinding cavity 10a and a guiding cavity 10b which are communicated with each other are formed in the grinding cylinder 10, the grinding cavity 10a is used for accommodating materials and grinding media 60, and the guiding cavity 10b is used for collecting the materials ground by the grinding media 60; the feed inlet 20 is arranged at the lower part of the grinding cylinder 10 and is communicated with the accommodating cavity 10 a; the discharge port 30 is arranged at the upper part of the grinding cylinder 10 and is communicated with the diversion cavity 10 b; the filter screen 40 is arranged in the grinding cylinder 10 and divides the internal space of the grinding cylinder 10 into a grinding cavity 10a and a flow guide cavity 10 a; the stirring device 50 is configured to stir the material and the grinding media 60 in the grinding chamber 10 a; the material enters the grinding cavity 10a from the feeding hole 20, the grinding medium 60 grinds the material, and the ground material is collected to the diversion cavity 10b through the filter screen 40 and then discharged from the discharging hole 30.

The material gets into grinding chamber 10a in the grinding chamber 10a from feed inlet 20 that sets up in the lower part of grinding vessel 10 under the pressure effect and mixes with the grinding medium 60 in the grinding chamber 10a, and the material is from supreme the motion down in grinding vessel 10 under the pressure effect, and the lower part is the great material of treating the grinding of particle diameter in being located grinding vessel 10, and the upper part is the less material of particle diameter after the grinding in being located grinding vessel 10. The motion of material from supreme down in grinding vessel 10, grinding medium 60 moves down under the effect of self gravity, material and grinding medium 60 have formed opposite direction of motion, and simultaneously, agitating unit 50 stirs material and grinding medium 60 in grinding chamber 10a, consequently, most grinding medium 60 mixes with the material uniformly under the effect of pressure, gravity and agitating unit stirring, material and grinding medium 60 high frequency contact for grinding medium 60 is more abundant to the grinding of material, and the grinding effect is better. A small portion of the grinding media 60 is gradually deposited by gravity to the lower portion of the grinding cylinder 10, so that the lower portion of the grinding cylinder 10 is distributed with a higher density of grinding media 60. The other small part of grinding medium 60 is mixed in the material and is wrapped by the material to come to the upper part of the grinding cylinder 10, the grinding medium 60 wrapped by the material and moving upwards moves at a lower speed under the action of self gravity, the extrusion force to the filter screen 40 is smaller, the filter screen 40 cannot be abraded, and along with the action of gravity, the grinding medium 60 wrapped by the material and moving upwards gradually moves downwards, so that the grinding medium on the upper part of the grinding cylinder 10 is less, the density is smaller, and the filter screen 40 cannot be blocked. In addition, since the discharge port 30 is disposed at the upper portion of the grinding cylinder 10 and the filtering screen 40 is used for filtering the ground material, the filtering screen 40 is necessarily located at the upper portion of the grinding cylinder 10, and therefore, the grinding medium 60 deposited at the lower portion of the grinding cylinder 10 does not wear or block the filtering screen 40. The material after grinding gets into water conservancy diversion chamber 10b through filter screen 40, and water conservancy diversion chamber 10b can hold the material of certain volume for the material that gets into water conservancy diversion chamber 10b has a buffer space, avoids the material after grinding directly to get into the upper portion discharge gate 20 that sets up at grinding vessel 10 through filter screen 40, avoids the material to the excessive extrusion that causes of filter screen 40, and filter screen 40 is damaged.

When the grinding mill is used for grinding natural asphalt mixed slurry or other materials in a fluid state, the feed inlet 20 is arranged at the lower part of the grinding cylinder 10, the discharge outlet 30 is arranged at the upper part of the grinding cylinder 10, the materials move from bottom to top under the action of pressure, the materials in the fluid state have viscosity, the influence of the pressure in the grinding cylinder 10 on the solid grinding medium 60 is small, the grinding medium 60 which is wrapped by the materials and moves upwards is influenced by the viscosity of the materials, under the combined action of gravity, the upward movement speed of the grinding medium 60 is slow, the inertia is small, and the impact force on the filter screen 40 is small compared with the upward movement speed of the materials, so that when the grinding mill is used for grinding natural asphalt mixed slurry or other materials in the fluid state, the abrasion and the blockage of the grinding medium 60 on the filter screen 40 can be better reduced.

In an embodiment of the present application, referring to fig. 2, the stirring device 50 includes a stirring shaft 51, a driving source 52, and a plurality of stirrers 53, the driving source 52 is disposed outside the grinding cylinder 10, one end of the stirring shaft 51 is connected to the driving source 52, the other end of the stirring shaft 51 is suspended in the grinding chamber 10a, and the stirrers 53 are disposed on the stirring shaft 51 and located in the grinding chamber 10 a. Through the rotation of driving source 52 drive (mixing) shaft 51, (mixing) shaft 51 drives agitator 53 motion, and agitator 53 stirs material and grinding medium 60 in grinding chamber 10a for the material mixes with grinding medium more evenly, and contact more frequently makes grinding medium 60 more abundant to the grinding of material, and the grinding effect is better.

In an embodiment of the present application, please refer to fig. 2-4, each stirrer 53 includes a mounting seat 531, a plurality of stirring rods 532 and a plurality of stirring blades 533, the mounting seat 531 has a hollow mounting channel 531a, the plurality of stirring rods 532 are disposed at intervals on the periphery of the mounting seat 531, one end of each stirring rod 532 is connected to the mounting seat 531, the other end of each stirring rod 532 is connected to the corresponding stirring blade 533, and each stirrer 53 is installed with the stirring shaft 51 through the mounting channel 531 a.

Set up a plurality of puddlers 532 and a plurality of stirring vane 533 on mount pad 531, install stirring vane 533 on mount pad 531 through puddler 532, firstly, be convenient for adjust stirring vane 533's installation angle, secondly, puddler 532 makes stirring vane 533 be close to more and grinds chamber 10a lateral wall, the stirring scope is wider, in addition, puddler 532 is less than the space that occupies in stirring vane 533, under the condition that makes stirring vane 533 be close to more and grind chamber 10a lateral wall, make material and grinding medium 60 have bigger accommodation space, make the stirring more abundant, grinding medium 60 and material mixed more evenly.

In one embodiment, the agitator 53 is detachably connected to the stirring shaft 51, and may be a key connection such as a flat key and a spline, or a pin connection, a screw connection, such as a threaded connection, a bolt fastening connection, or the like. Agitator 53 and (mixing) shaft 51 are detachable to be connected, avoid in the use, because the damage of agitator 53, need dismantle the maintenance with whole agitating unit 50, both can convenient quick change agitator 53, also can practice thrift the cost, reduce when the maintenance.

In an embodiment, the other end of each stirring rod 532 is detachably connected to the corresponding stirring blade 533, and may be in a key connection manner such as a flat key and a spline, or in a pin connection manner, a screw connection manner, or the like. Because stirring blade 533 is the loss piece, in the use, through material and grinding medium 60 constantly rub, collide, stirring blade 533 probably warp or damage, adopts detachably to connect, avoids changing whole agitator 53, and the change stirring blade 533 of both being convenient for can practice thrift the cost again, reduce when maintaining.

In one embodiment of the present application, referring to fig. 2, 5 and 6, the stirring blades 533 of the stirrer 53 near one end of the stirring shaft 51 are configured to push the grinding media 60 toward the other end of the stirring shaft 51. For example, the blade 533 of the agitator 53 near the upper end of the agitation shaft 51 is arranged to push the grinding medium 60 downward, the blade 533 of the agitator 53 near the lower end of the agitation shaft 51 is arranged to push the grinding medium 60 upward, or both the blade 533 of the agitator 53 near the upper end of the agitation shaft 51 and the blade 533 of the agitator 53 near the lower end of the agitation shaft 51 are arranged to push the grinding medium 60 downward and upward. By adopting the design, excessive grinding media 60 flowing to the upper part or the lower part of the vertical grinding mill is avoided, and the grinding media 60 are further prevented from being worn or blocking the filter screen 40, so that the grinding media 60 are more uniformly distributed around the stirrer 53, and the grinding media 60 and materials are fully contacted and ground in the range of the stirrer 53.

Specifically, the material receiving surface 533a of the stirring blade 533 of the stirrer 53 near the upper end of the stirring shaft 51 is inclined upward, and the grinding medium 60 is driven downward by the vortex formed by the stirring blade 533. The material located at the upper part of the grinding cavity 10a moves from bottom to top under the action of pressure, and the material particle size close to the upper end of the stirring shaft 51 is smaller after the material is ground, so that the grinding medium 60 is relatively larger, and the stirring blade 533 forms a downward vortex due to the upward inclined arrangement of the material facing surface 533a, so that the solid grinding medium 60 and the material mixture are driven downwards. The influence of the pressure in the grinding cylinder 10 on the solid grinding medium 60 is small, and the grinding medium 60 entrained by the material and moving upwards is relatively slow in upward movement speed and relatively small in inertia under the action of the gravity of the grinding medium 60, and is easy to move downwards quickly under the action of the vortex compared with the upward movement speed of the material. Although the material will also move downward under the action of the vortex, the material will still move upward at a faster rate than the grinding media 60 due to the smaller particle size and lighter weight of the material, which is less affected by the downward drive of the vortex. Therefore, the material in the upper part of the grinding chamber 10a moves further from bottom to top under the pressure, the grinding medium 60 moves downward under the self-gravity and the vortex, and the material is gradually separated from the grinding medium 60. The material receiving surface 533a of the stirring blade 533 of the stirrer 53 near the lower end of the stirring shaft 51 is inclined downward, and the stirring blade 533 drives the grinding medium 60 upward. The material facing surface 533a is inclined downwards to form an upward vortex, the material located at the lower part of the grinding chamber 10a moves from bottom to top under the action of pressure, and the grinding medium 60 moves upwards under the action of the vortex and the material.

When the above-mentioned grinding mill is used for grinding natural asphalt mixed slurry or other materials in a fluid state, the fluid state materials have viscosity, the influence of the pressure in the grinding cylinder 10 on the solid grinding medium 60 is small, the influence of the pressure in the grinding cylinder 10 on the fluid state materials is large, the grinding medium 60 entrained by the materials and moving upwards is relatively slow in moving upwards and relatively small in inertia under the action of self gravity, compared with the upward moving speed of the materials, and therefore, the grinding medium 60 positioned at the upper part of the grinding cylinder 10 is more likely to move downwards under the action of downward vortex. The grinding media 60 located in the lower portion of the grinding cylinder 10 moves upward with the material and the upward vortex.

It will be appreciated that the agitator 53 near one end of the agitator shaft 51 is configured to push the grinding media 60 toward the other end of the agitator shaft 51, and that there may be one agitator 53, two, or more, such as three, four, five, or six, etc.

The material receiving surface 533a of the stirring blade 533 means a surface of the stirring blade 533 formed to press the material toward the axial direction of the stirring shaft 51 in the rotation direction of the stirring shaft 51. Herein, "pressing material in the axial direction of the stirring shaft" is understood to mean at least a component of the force pressing the material in the axial direction of the stirring shaft 51. For example, if the material receiving surface 533a is inclined downward, the stirring blade 533 generates a component of pressing force to the material toward the axial direction of the stirring shaft 51 upward and radially outward; the material receiving surface 533a is inclined upward, so that the stirring blades 533 generate a component of pressing force to the material toward the axial direction of the stirring shaft 51 downward and the radial direction outward.

In one embodiment of the present application, referring to fig. 2, 5 and 6, the stirring blades 533 of the stirrer 53 located between the two ends of the stirring shaft 51 are configured to purely rotationally push the grinding media 60. By the design, the grinding medium 60 is prevented from moving upwards or downwards under the action of the stirrer 53 positioned between the two ends of the stirring shaft 51, so that the grinding medium 60 and the material are mixed together and repeatedly collide and rub with each other in the range of the stirrer 53, and the grinding medium 60 and the material are fully contacted and ground in the range of the stirrer 53.

Specifically, the stirring blade 533 of the stirrer 53 located between both ends of the stirring shaft 51 is horizontally disposed, and the horizontally disposed stirring blade 533 purely rotationally pushes the grinding media 60.

In one embodiment of the present application, referring to fig. 2, the number of the stirring blades 533 of the stirrer 53 located at the two ends of the stirring shaft 51 is greater than the number of the stirring blades 533 of the stirrer 53 located between the two ends of the stirring shaft 51. With such a design, the larger the number of the stirring blades 533 of the stirrer 53 located at both ends of the stirring shaft 51, the denser the stirring blades 533 are arranged, the smaller the gap between the stirring blades 533 is, the more difficult the solid grinding medium 60 bypasses the upper part or the lower part of the stirring blade 533 close to the grinding cavity 10a, and the excessive grinding medium 60 is further prevented from flowing to the upper part or the lower part of the vertical grinder, so that the grinding medium 60 is suspended, and can be more uniformly distributed around the stirrer 53, thereby improving the grinding efficiency of the material.

In an embodiment of the present application, please refer to fig. 2, fig. 3, and fig. 6, the stirring blades 533 of two adjacent stirrers 53 are installed in a staggered manner. Because agitator 53 sets up on (mixing) shaft 51, that is to say, two adjacent agitators 53 set up from top to bottom, adjacent stirring vane 533 that is located agitator 53 of top staggers each other with the stirring vane 533 of agitator 53 that is located the below for the stirring scope is wider, stirs more fully. In other embodiments, the stirring blades 533 of two adjacent stirrers 53 may also be installed in alignment.

In an embodiment of the present application, please refer to fig. 2, the diversion cavity 10b is enclosed at the upper portion of the grinding cavity 10 a. The diversion cavity 10b and the grinding cavity 10a form a structure with a T-shaped section. Because the filter screen 40 divides the inner space of the grinding cylinder 10 into the grinding cavity 10a and the flow guide cavity 10b, the flow guide cavity 10b is enclosed on the upper part of the grinding cavity 10a, the filter screen 40 is annular, one end of the filter screen 40 is connected with the top wall of the flow guide cavity 10b, and the other end of the filter screen 40 is connected with the side wall of the flow guide cavity 10 b. Due to the design, the filter screen 40 can have a larger filtering area, so that the ground materials in the grinding cavity 10a can enter the flow guide cavity 10b more quickly, the filter screen 40 is prevented from being blocked by the materials, and the working efficiency of the grinding machine is improved.

In an embodiment of the present application, please refer to fig. 5, the diversion chamber 10b is disposed above the grinding chamber 10 a. The diversion cavity 10b and the grinding cavity 10a form a structure with a T-shaped cross section, and in other embodiments, the diversion cavity 10b and the grinding cavity 10a may also form a cylindrical structure (not shown), that is, the outer cylinder 11 and the inner cylinder 12 are both cylindrical. Because the filter screen 40 divides the grinding cylinder 10 into the grinding cavity 10a and the flow guide cavity 10b, the flow guide cavity 10b is arranged above the grinding cavity 10a, the filter screen 40 is planar, the periphery of the filter screen 40 is connected with the side wall of the grinding cavity 10a, and the area of the filter screen 40 is equal to the cross-sectional area of the grinding cavity 10a, so that the filter screen 40 has a larger filtering area, the ground materials in the grinding cavity 10a can enter the flow guide cavity 10b more quickly, and the working efficiency of the grinding machine is improved.

In order to avoid that a layer of filter screen is worn or damaged to cause grinding media to enter the diversion cavity from the grinding cavity. In an embodiment of the present application, the filter screen 40 is disposed as a single layer or multiple layers, for example, the filter screen 40 in fig. 2 and fig. 5 can be separately and independently used, or the filter screen 40 in fig. 2 and fig. 5 can be used in combination, that is, the filter screen 40 is disposed as two layers, the first filter screen is a second filter screen 42 horizontally disposed in a planar shape, the second filter screen is a first filter screen 41 vertically disposed in an annular shape, the second filter screen 42 separates the inner space of the grinding cylinder 10 into a grinding cavity 10a and a flow guide cavity 10b, the first filter screen 41 is located in the flow guide cavity 10b, and the flow guide cavity 10b is separated into two sub flow guide cavities. The diversion cavity 10b and the grinding cavity 10a form a structure with a T-shaped section. In other embodiments, the multiple layers of filter screens may be one or more of horizontally disposed, obliquely disposed, and vertically disposed.

In one embodiment of the present application, referring to fig. 2 and 5, the vertical grinder further includes a positioning member 70, and the positioning member 70 is connected to the suspended end of the stirring shaft 51. The spacer 70 serves to reduce the lower end of the agitating shaft 51 from shifting during rotation. Because the grinding media 60 are under the action of gravity, a part of the grinding media 60 gradually settles to the bottom of the grinding chamber 10a under the action of gravity, that is, the density of the grinding media 60 at the bottom of the grinding chamber 10a is higher than the density of the grinding media 60 at other positions of the grinding chamber 10a, the unstirred bottom grinding media 60 are kept relatively static, the grinding media 60 at least partially surround the periphery of the positioning member 70, the relatively dense grinding media 60 are used for limiting the deviation of the positioning member 70, the positioning function of the positioning member 70 is enhanced, and the deviation of the lower end of the stirring shaft 51 is further reduced.

When the above-mentioned grinding machine is used for grinding natural asphalt mixture slurry or other materials in a fluid state, the materials in the fluid state have viscosity, and the grinding medium 60 deposited at the bottom of the grinding chamber 10a is bonded into a relatively stable whole, which is equivalent to providing a relatively stable 'mounting seat' for the positioning member 70, further enhancing the positioning effect on the positioning member 70, and further reducing the deviation of the lower end of the stirring shaft 51.

In an embodiment of the present application, referring to fig. 2, 3, 5, and 7, the vertical grinder further includes a plurality of wear-resistant linings 80, each wear-resistant lining 80 includes a plurality of protrusions 81 facing the inside of the grinding chamber 10a, and the plurality of wear-resistant linings 80 cover the inner wall of the grinding chamber 10 a. On the one hand, the protrusions 81 effectively increase the surface area of the wear-resistant lining 80 that is in contact with the material, grinding media 60, enabling the wear-resistant lining 80 to be used for a longer period of time. Secondly, the surface area of the wear-resistant lining 80 can be increased in a large area by means of the protrusions 81, and the space in the grinding chamber 10a is not occupied too much. Thirdly, the protrusions 81 increase the roughness of the surface of the wear-resistant lining 80 close to the grinding cavity 10a, and increase the friction force between the wear-resistant lining 80 and the material, so that the material is ground to the required particle size more quickly. In one embodiment, the heights of the plurality of protrusions 81 are not equal. In another embodiment the plurality of projections 81 are of equal height.

In an embodiment of the present application, referring to fig. 8, the vertical grinding machine includes a connecting member 100, a counterbore 82 is formed on the wear-resistant lining 80, the connecting member 100 fixes the wear-resistant lining 80 on the inner wall of the grinding cavity 10a through the counterbore 82, and a distance between a first end surface 82a of the counterbore 82 close to the inner wall of the grinding cavity 10a and a second end surface 100a of the connecting member 100 close to the inner wall of the grinding cavity 10a is C, where C is greater than 0.

The connector 100 may be a screw, a bolt, a stud, etc., and the second end face 100a has a structure, such as a straight groove or a cross groove, for applying force to the connector 100.

The distance between the first end face 82a and the second end face 100a is greater than zero, that is, the end face of the connecting member 100 close to the grinding chamber 10a is located in the counterbore 82, and in the use process of the grinding machine, the material is filled into the counterbore 82 to shield the end face of the connecting member 100 close to the grinding chamber 10a, so that the grinding medium 60 and the material in motion are prevented from wearing the structure of the end face of the connecting member 100 close to the grinding chamber 10a, such as a straight groove or a cross groove.

In an embodiment of the present application, please refer to fig. 8, a value range of a distance C between the first end surface 82a and the second end surface 100a may be selected as: c is more than or equal to 5mm and less than or equal to 10 mm.

If C < 5mm, the filling level of the material in the counterbore 82 is too small, the moving grinding media 60 may scrape against the end face of the connecting member 100 near the grinding chamber 10 a. If C is greater than 10mm, the thickness of the connecting portion between the wear-resistant lining 80 and the connecting member 100 is too thin, which affects the stability of the connection between the connecting member 100 and the wear-resistant lining 80. If C is larger than or equal to 5mm and smaller than or equal to 10mm, not only can enough filling amount of materials in the counter bore 82 be ensured, the end face, close to the grinding cavity 10a, of the connecting piece 100 can be effectively prevented from being scraped by the grinding medium 60 in motion, but also the thickness of the position, where the wear-resistant lining 80 is connected with the connecting piece 100, can be ensured to be thick enough, and the connecting piece 100 is stably connected with the wear-resistant lining 80.

In an embodiment of the present application, referring to fig. 2 and 3, the cross section of the inner wall of the grinding cylinder 10 is circular, the wear-resistant lining 80 is plate-shaped, and a plurality of wear-resistant linings 80 form a regular polygon inscribed in the grinding cylinder 10 along the cross section direction of the grinding cylinder 10. The number of sides of the regular polygon is preferably 6 to 10.

The wear-resistant lining 80 is required to have wear-resistant property, so that the wear-resistant lining 80 is generally high in hardness, and is convenient to manufacture and process. It can be understood that the plurality of wear-resistant linings 80 form a regular polygon inscribed in the inner wall of the grinding cylinder 10, that is, the plurality of wear-resistant linings 80 are inscribed in the inner wall of the grinding cylinder 10 one by one to form a grinding cavity 10a, and the cross section of the grinding cavity 10a is a regular polygon. When the circle is inscribed with the polygon, the area of the regular polygon is the largest, that is, when the cross section of the inner wall of the grinding cylinder 10 is circular, under the condition that the volume of the grinding cylinder 10 is fixed, the cross section area of the grinding cavity 10a formed by the wear-resistant linings 80 is the largest when the regular polygon is formed, the volume of the grinding cavity 10a is the largest, and more materials and grinding media 60 can be accommodated in the grinding cavity 10 a.

Because the smaller the number of the wear-resistant linings 80, the fewer the number of the sides of the formed regular polygon, the smaller the area of the regular polygon, and the larger the gap between the wear-resistant linings 80 and the grinding cylinder 10, the effective use space of the grinding cylinder 10 can be greatly reduced; the more wear-resisting inside lining 80, although can increase the effective usage space of grinding vessel 10, but also increased the use quantity of wear-resisting inside lining 80, wear-resisting inside lining 80 processing has been increased, the installation, the work load of maintenance, in addition, when regular polygon's limit number is greater than 10, grinding vessel's effective usage space increment is less, therefore, regular polygon's limit number is 6 ~ 10, for example, 6, 7, 8, 9, 10, the cross section that corresponds the grinding chamber 10a of a plurality of wear-resisting inside lining 80 formation respectively is the hexagon, the heptagon, the octagon, nonagon and decagon, this kind of design, can guarantee that grinding vessel 10's effective usage space is great, can guarantee again that wear-resisting inside lining 80's use quantity is comparatively reasonable.

In order to heat the material, in an embodiment of the present application, referring to fig. 2 and 3, the vertical mill further includes a heat conduction device 90, and the heat conduction device 90 is configured to conduct heat to the inside of the grinding cylinder 10.

It will be appreciated that when the mill is used for grinding liquid asphalt mixture or other materials to be ground, heat is transferred to the interior of the grinding drum 10 to maintain the asphalt mixture or other materials at a temperature that maintains them in a viscous, liquid, i.e., fluid, state.

In an embodiment of the present application, please refer to fig. 9, the grinding cylinder 10 includes an outer cylinder 11 and an inner cylinder 12 which are arranged at an interval, the heat conduction device 90 includes a heat conduction cavity 90a formed between the outer cylinder 11 and the inner cylinder 12 and a flow guide rib 13 arranged in the heat conduction cavity 90a, the outer cylinder 11 is provided with an oil inlet 11a and an oil outlet 11b which are respectively communicated with the heat conduction cavity 90a, and the flow guide rib 13 is configured to allow heat conduction oil to flow from the oil inlet 11a to the oil outlet 11b along the circumferential direction of the inner cylinder 12 in a spiral manner. Heat conduction oil enters the heat conduction cavity 90a from the oil inlet 11a, the heat conduction oil circularly flows to the oil outlet 11b along the circumferential direction of the inner cylinder 12 under the diversion of the diversion ribs 13, and in the process that the heat conduction oil circularly flows in the heat conduction cavity 90a, the heat conduction oil transfers heat to the inner cylinder 12 and then transfers the heat to the grinding cavity 10a, so that the temperature of the material is maintained. The flow guiding ribs 13 are spirally fixed on the inner cylinder 12 in a threaded connection, welding or embedded connection mode.

It should be noted that other liquids for heat conduction may be disposed in the heat conduction cavity, and it is only necessary that the high-temperature liquid in the heat conduction cavity can transfer heat to the material in the grinding cavity to maintain the temperature of the material.

In another embodiment, referring to fig. 10, the grinding cylinder 10 includes an outer cylinder 11 and an inner cylinder 12 closely arranged, the heat conduction device 90 includes a flow guide groove 13 ' formed on an inner side wall of the outer cylinder 11, the outer cylinder 11 is provided with an oil inlet 11a and an oil outlet 11b respectively communicated with the flow guide groove 13 ', and the flow guide groove 13 ' is configured to allow heat conduction oil to flow from the oil inlet 11a to the oil outlet 11b in a spiral manner along a circumferential direction of the inner cylinder 12. In other embodiments, the diversion trench 13 ' may also be opened on the outer sidewall of the inner barrel 12, or both on the inner sidewall of the outer barrel 11 and on the outer sidewall of the inner barrel 12, and the diversion trench 13 ' on the inner sidewall of the outer barrel 11 and the diversion trench 13 ' on the outer sidewall of the inner barrel 12 are aligned or staggered.

In another embodiment, referring to fig. 11, a plurality of annular guiding grooves 13' are respectively formed on the inner side wall of the outer cylinder 11 and the outer side wall of the inner cylinder 12. In other embodiments, a plurality of annular guide grooves 13' may be formed on the inner sidewall of the outer cylinder 11 or the outer sidewall of the inner cylinder 12. Correspondingly, the oil inlet 11a and the oil outlet 11b are respectively arranged corresponding to the plurality of diversion trenches 13'.

It can be understood that, in an embodiment, referring to fig. 9 and 10, the oil inlet 11a is opened above the outer cylinder 11, the oil outlet 11b is opened below the outer cylinder 11, and the heat conduction oil enters the heat conduction cavity 90a from the oil inlet 11a located above the outer cylinder 11, flows around the inner circumference of the heat conduction cavity 90a, and finally flows out from the oil outlet 11b located below the outer cylinder 11. In another embodiment, the oil inlet 11a is opened below the outer cylinder 11, the oil outlet 11b is opened above the outer cylinder 11, and the heat transfer oil enters the heat transfer cavity 90a from the oil inlet 11a located below the outer cylinder 11, flows around the inner circumference of the heat transfer cavity 90a, and finally flows out from the oil outlet 11b located above the outer cylinder 11.

In another embodiment of the present application, the heat conducting device 90 includes an oil pipe (not shown) coiled on the outer wall of the grinding cylinder 10, and the oil pipe is configured to flow heat conducting oil. The oil conduit can be in a spiral form or can be circularly coiled on the outer wall of the grinding cylinder 10.

The above-mentioned "spiral" means that at least part of the conduction oil goes around the grinding cylinder 10 at least one turn from the oil inlet 11a to the oil outlet 11 b. The 'spiral' in fig. 11 means that the heat conducting oil goes from the oil inlet 11a to the oil outlet 11b after passing through each half circle along the grinding cylinder 10 to both sides, and the actual stroke is still at least one circle. In the bypassing process, the heat conduction oil heats the area of the inner cylinder 12 passing through, the flowing path of the heat conduction oil is prolonged, the heat conduction oil is prevented from flowing to the oil outlet 11b from the shortest path of the oil inlet 11a, the uniform heating of the inner cylinder 12 is ensured, and the temperature stability of the materials in the production process is maintained.

It should be noted that not all the heat conduction oil needs to be guided by the heat conduction cavity 90a or the diversion trench 13 'to be circumferentially coiled to realize uniform heating, and only part of the heat conduction oil needs to be circularly flowed from the oil inlet 11a to the oil outlet 11b along the circumferential direction under the action of the heat conduction cavity 90a or the diversion trench 13' to realize uniform heating. It can be understood that the more heat transfer oil that can flow circularly in the circumferential direction, the better the uniform heating effect.

In an embodiment, the outer sidewall of the grinding cylinder 10 may be provided with a heat insulating layer for heat insulating the heat conducting cavity 90a or the guiding groove 13'.

The vertical grinder in the embodiment of the application can be used for grinding natural asphalt and can also be used for grinding other materials.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A vertical grinding mill, characterized by comprising:

2. The vertical mill of claim 1, wherein the stirring device comprises a stirring shaft, a driving source and a plurality of stirrers, the driving source is arranged outside the grinding cylinder, one end of the stirring shaft is connected with the driving source, the other end of the stirring shaft is suspended in the grinding cavity, and the stirrers are arranged on the stirring shaft and positioned in the grinding cavity.

3. The vertical mill of claim 2, wherein each of the stirrers comprises 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 periphery of the mounting seat, one end of each of the stirring rods is connected with the mounting seat, the other end of each of the stirring rods is connected with the corresponding stirring blade, and each of the stirrers is installed with the stirring shaft through the mounting channel in a matching manner.

4. The vertical mill of claim 3, wherein the agitator blades of the agitator near one end of the agitator shaft are configured to push the grinding media towards the other end of the agitator shaft;

5. The vertical mill of claim 1, wherein the filter screen is provided in a single layer or multiple layers.

6. The vertical mill of claim 1, wherein the deflector chamber is enclosed in an upper portion of the grinding chamber;

or the diversion cavity is arranged above the grinding cavity.

7. A vertical mill according to any one of claims 2 to 6, further comprising a locating member connected to an end of the agitator shaft from which it is suspended.

8. The vertical mill according to any one of claims 1 to 6, further comprising a plurality of wear-resistant liners, each wear-resistant liner comprising a plurality of protrusions facing the inside of the grinding chamber, the wear-resistant liners covering the grinding cylinder inner wall.

9. A vertical mill according to any one of claims 1 to 6, further comprising heat conducting means configured to conduct heat to the interior of the grinding drum.

10. The vertical grinding machine according to claim 9, wherein the grinding drum comprises an outer drum body and an inner drum body which are arranged at intervals, the heat conduction device comprises a heat conduction cavity formed between the outer drum body and the inner drum body and a flow guide rib arranged in the heat conduction cavity, the outer drum body is provided with an oil inlet and an oil outlet which are respectively communicated with the heat conduction cavity, and the flow guide rib is configured in a manner that heat conduction oil circularly flows from the oil inlet to the oil outlet along the circumferential direction of the inner drum body;