CN210815500U - Grinding machine - Google Patents

Abstract

The application provides a grinding machine, including grinding vessel, wear-resisting inside lining and the connecting piece that is used for holding grinding medium, it is a plurality of wear-resisting inside lining covers the grinding vessel inner wall, the counter bore has been seted up on the wear-resisting inside lining, the connecting piece passes through the counter bore will wear-resisting inside lining is fixed on the grinding vessel inner wall, the counter bore is close to the inside first terminal surface of grinding vessel with the connecting piece is close to distance between the inside second terminal surface of grinding vessel is A, and wherein, A > 0. The distance between the first end face and the second end face is larger than zero, namely the end face of the connecting piece close to the inner part of the grinding cylinder is positioned in the counter bore, when the grinding machine is used, materials are filled into the counter bore, the end face of the connecting piece close to the inner part of the grinding cylinder is shielded, and grinding media and the materials in motion are prevented from wearing the end face of the connecting piece close to the inner part of the grinding cylinder.

Description

Grinding machine

Technical Field

The application relates to the technical field of material grinding, in particular to a 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 asphalt mineral, which mainly comprises colloid 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 current machine of grinding includes the grinding vessel, wear-resisting inside lining, the connecting piece and the grinding ball that is located the grinding vessel inside, wear-resisting inside lining covers the grinding vessel inner wall, the connecting piece is fixed wear-resisting inside lining on the grinding vessel inner wall, the grinding ball is used for grinding natural asphalt to setting for the size, wear-resisting inside lining is used for avoiding grinding ball wearing and tearing grinding vessel inner wall, grinding ball and natural asphalt mixed slurry are at the terminal surface of the continuous wearing and tearing connecting piece of motion in-process, the terminal surface that finally leads to the connecting piece is damaged, the connecting piece is difficult to take off and leads to changing wear.

SUMMERY OF THE UTILITY MODEL

In view of the above, embodiments of the present application are directed to a grinding machine to solve the problem of the prior art that the end face of the connecting member to which the wear-resistant lining is mounted is worn.

In order to solve the technical problem, the technical scheme of the application is realized as follows:

the embodiment of the application provides a grinding machine, it is including the grinding vessel, wear-resisting inside lining and the connecting piece that are used for holding the grinding medium, and is a plurality of wear-resisting inside lining covers the grinding vessel inner wall, the counter bore has been seted up on the wear-resisting inside lining, the connecting piece passes through the counter bore will wear-resisting inside lining is fixed on the grinding vessel inner wall, the counter bore is close to the inside first terminal surface of grinding vessel with the connecting piece is close to distance between the inside second terminal surface of grinding vessel is A, and wherein, A > 0.

Furthermore, A is more than or equal to 5mm and less than or equal to 10 mm.

Further, each wear-resistant lining comprises a plurality of protrusions facing the inside of the grinding cylinder.

Further, the plurality of bulges are distributed in an array or staggered way;

and/or the height of a plurality of said protrusions is equal or unequal.

Furthermore, the cross section of the inner wall of the grinding cylinder is circular, the wear-resistant lining is plate-shaped, and a plurality of wear-resistant linings form a regular polygon inscribed in the grinding cylinder along the cross section direction of the grinding cylinder;

or the cross section of the inner wall of the grinding cylinder is circular, the wear-resistant linings are arc-shaped, and the plurality of wear-resistant linings form a circle shape inscribed in the grinding cylinder along the cross section direction of the grinding cylinder.

Furthermore, the number of the wear-resistant linings is 6-10 along the cross section of the grinding cylinder.

Further, a spacer is arranged between every two adjacent wear-resistant linings;

and/or a gasket is arranged at the joint of the connecting piece and the wear-resistant lining.

Further, the grinder includes:

the stirring device comprises 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 with 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;

and the positioning piece is connected with one end of the stirring shaft suspension.

Further, agitating unit includes a plurality of agitators, 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 is installed.

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 propel the grinding media purely rotationally.

The grinding machine that this application embodiment provided, the counter bore is close to the inside terminal surface of grinding vessel and the distance between the terminal surface that the connecting piece is close to the grinding vessel inside is greater than zero, that is to say the connecting piece is close to the inside terminal surface of grinding vessel and is located the counter bore, and in the grinding machine use, the material is filled and is got into in the counter bore, is close to the inside terminal surface of grinding vessel with the connecting piece and shields, avoids grinding medium and the material wearing and tearing connecting piece in the motion to be close to the inside terminal surface of grinding vessel.

Drawings

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

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

FIG. 3 is a partial cross-sectional view of the polishing liner and polishing cartridge of the polishing machine of FIG. 1;

FIG. 4 is a cross-sectional view taken along the line C-C in FIG. 1;

FIG. 5 is a schematic structural diagram of an agitator according to an embodiment of the present application;

FIG. 6 is a schematic view of a wear liner according to an embodiment of the present application;

FIG. 7 is a left side view of the wear liner of FIG. 6;

FIG. 8 is a schematic view of another embodiment of a wear liner of the present application;

fig. 9 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.

Description of the reference numerals

A grinding cylinder 10; a feed port 11; a discharge port 12; an outer cylinder 13; an inner cylinder 14; an oil inlet 13 a; an oil outlet 13 b; a wear resistant lining 20; a counterbore 21; the first end face 21 a; a connecting member 30; a second end face 30 a; a spacer 40; a gasket 50; grinding media 60; a stirring device 70; a stirring shaft 71; a drive source 72; a stirrer 73; a mount 731; mounting channel 731 a; a stirring rod 732; a stirring blade 733; a support device 80; a positioning member 90; a heat conducting device 100; the oil guide chamber 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, "mm" refers to millimeters. By "inside the grinding cylinder" is meant that the grinding cylinder forms a cavity containing the material and grinding media. It is to be understood that such directional terms are merely for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application.

The embodiment of the present application provides a grinding machine, please refer to fig. 1-3, the grinding machine includes a grinding cylinder 10 for accommodating grinding media, a plurality of wear-resistant liners 20 and a connecting member 30, the inner wall of the grinding cylinder 10 is covered by the wear-resistant liners 20, a counter bore 21 is opened on the wear-resistant liner 20, the connecting member 30 fixes the wear-resistant liner 20 on the inner wall of the grinding cylinder 10 through the counter bore 21, a distance between a first end face 21a of the counter bore 21 close to the inside of the grinding cylinder 10 and a second end face 30a of the connecting member 30 close to the inside of the grinding cylinder 10 is a, where a is greater than 0.

The connecting member 30 may be a threaded member such as a bolt or a screw, and the second end surface 30a has a structure for applying force to the connecting member, such as a straight groove or a cross groove.

The distance between the first end face and the second end face is larger than zero, namely the end face of the connecting piece close to the inner part of the grinding cylinder is positioned in the counter bore, when the grinding machine is used, materials are filled into the counter bore, the end face of the connecting piece close to the inner part of the grinding cylinder is shielded, and the grinding medium and the materials in motion are prevented from wearing the structure of the end face of the connecting piece close to the inner part of the grinding cylinder, such as a straight groove or a cross groove.

In an embodiment of the present application, please refer to fig. 3, a value range of a distance a between the first end surface 21a and the second end surface 30a may be selected as: a is more than or equal to 5mm and less than or equal to 10 mm.

If A is less than 5mm, the filling amount of the materials in the counter bore is too small, and the grinding media in motion can scrape the end face of the connecting piece close to the inner part of the grinding cylinder. If A is more than 10mm, the thickness of the position where the wear-resistant lining is connected with the connecting piece is too thin, and the connection stability between the connecting piece and the wear-resistant lining is influenced. If A is more than or equal to 5mm and less than or equal to 10mm, the sufficient filling amount of the materials in the counter bore is ensured, the grinding medium in motion can be effectively prevented from scraping the end face, close to the inner part of the grinding cylinder, of the connecting piece, the thickness of the position, connected with the connecting piece, of the wear-resistant lining can be ensured to be thick enough, and the stable connection between the connecting piece and the wear-resistant lining is ensured.

In an embodiment of the present application, referring to fig. 3, 6, 7 and 8, each wear-resistant lining 20 comprises a plurality of protrusions 22 facing the inside of the grinding vessel 10. The plurality of protrusions 22 may be equal or different in height.

On one hand, the surface area of the wear-resistant lining contacted with materials and grinding media is effectively increased by the protrusions, so that the wear-resistant lining can be used for a longer time. Secondly, the surface area of the wear-resistant lining can be increased in a large area in a protruding mode, and too much space in the grinding cylinder is not occupied. Thirdly, the protrusions increase the roughness of the surface of the wear-resistant lining close to the inside of the grinding cylinder, and the friction force between the wear-resistant lining and the materials is increased, so that the materials are ground to the required particle size more quickly.

In order to increase the number of protrusions per unit area, in an embodiment of the present application, please refer to fig. 6, a plurality of protrusions 22 are distributed in an array. In another embodiment of the present application, please refer to fig. 8, the plurality of protrusions 22 are distributed in a staggered manner.

In one embodiment of the present application, please refer to fig. 7, the height of the plurality of protrusions 22 gradually decreases along the material traveling direction. Along material advancing direction, a plurality of bellied highly reduce gradually, then on material advancing direction, be formed with the difference in height through the arch of co-altitude not, increase between the material, between material and the wear-resisting medium, the friction between material and the wear-resisting inside lining, further make the more quick grinding of material to the demand particle diameter.

In an embodiment of the present application, referring to fig. 4, the cross section of the inner wall of the grinding cylinder 10 is circular, the wear-resistant lining 20 is plate-shaped, and a plurality of wear-resistant linings 20 form a regular polygon inscribed in the grinding cylinder 10 along the cross section direction of the grinding cylinder 10. Along the cross section of the grinding cylinder 10, the number of the wear-resistant linings 20 is 6-10. In another embodiment, the cross section of the inner wall of the grinding cylinder 10 is circular, the wear-resistant lining 20 is arc-shaped, and along the cross section of the grinding cylinder 10, a plurality of wear-resistant linings 20 form a circle shape internally connected with the grinding cylinder 10. In a preferred embodiment, the wear-resistant lining 20 is an arc shape matching with the inner wall of the grinding cylinder 10, so that the wear-resistant lining 20 is more attached to the inner wall of the grinding cylinder 10.

The wear-resistant lining is required to have wear-resistant characteristic, so that the wear-resistant lining is generally high in hardness, and is made into a plate shape, so that the wear-resistant lining is convenient to manufacture and process. It can be understood that the wear-resistant linings form a regular polygon inscribed in the grinding cylinder, that is, the wear-resistant linings are inscribed in the grinding cylinder one by one to form a cavity, and the cross section of the cavity is a regular polygon. When the circle inscribes polygon, regular polygon's area is the biggest, and is to say, when the cross section of grinding vessel inner wall is circular, under the certain condition of grinding vessel volume, cavity that a plurality of wear-resisting inside linings formed is for being bigger for non-regular polygon cross-sectional area when regular polygon, consequently, cavity volume when a plurality of wear-resisting inside linings form regular polygon is bigger, can hold more material and grinding medium in the cavity that wear-resisting inside lining formed. The wear-resistant lining is manufactured into an arc shape, the arc-shaped wear-resistant lining can be attached to the inner wall of the grinding cylinder, the size of a cavity formed by the wear-resistant linings and attached to the inner wall of the grinding cylinder is the largest under the condition that the size of the grinding cylinder is fixed, and more materials and grinding media can be accommodated in the cavity formed by the wear-resistant linings.

The smaller the number of the wear-resistant linings is, the more convenient the processing, the manufacturing and the maintenance are, and the smaller the number of the sides of the formed regular polygon is, the smaller the area of the regular polygon is, the larger the gap between the wear-resistant lining and the grinding cylinder is, so that the effective use space of the grinding cylinder can be greatly reduced; the wear-resisting inside lining quantity is more, though can increase the effective usage space of grinding vessel, but also increased the use quantity of wear-resisting inside lining, wear-resisting inside lining 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 cavity of a plurality of wear-resisting inside linings formation respectively is the hexagon, the heptagon, the octagon, this kind of design of nonagon and decagon, can guarantee that grinding vessel's effective usage space is great, can guarantee again that wear-resisting inside lining's use quantity is comparatively reasonable.

In an embodiment of the present application, please refer to fig. 2, a spacer 40 is disposed between two adjacent wear-resistant linings 20. For example when the material is natural asphalt mixed slurry, because natural asphalt mixed slurry condenses easily on wear-resisting inside lining and makes wear-resisting inside lining adhesion together, set up the shock insulator between two adjacent wear-resisting inside linings, the material of shock insulator can be the asbestos, rubber, non-metallic high temperature resistant material such as synthetic resin, also can be metal material, the shock insulator can avoid two adjacent wear-resisting inside linings directly to bond together, be not convenient for dismantle under the condition of mount pad, perhaps damage the wear-resisting inside lining that does not need the change when using external force to destroy the adhesive linkage, through the mode that sets up the shock insulator, wear-resisting inside lining can be dismantled fast. In another embodiment, two adjacent wear liners 20 are in close-fitting engagement.

In order to avoid material condensing on the joint of the coupling piece and the wear lining, the coupling piece is difficult to disassemble. In one embodiment of the present application, referring to fig. 3, a gasket 50 is disposed at the joint of the connecting member 30 and the wear-resistant lining 20. The material of gasket can be nonmetal high temperature resistant materials such as asbestos, rubber, synthetic resin, also can be metal material, increases the gasket and not only can reduce the wearing and tearing to counter bore step surface when screwing up the connecting piece, can also avoid connecting piece and wear-resisting inside lining directly to bond together, is not convenient for dismantle under the condition of connecting piece, if use external force to destroy the adhesive linkage probably damage wear-resisting inside lining or connecting piece, through the mode that sets up the gasket, the connecting piece can be dismantled fast.

In an embodiment of the present application, referring to fig. 2, the grinding mill includes a stirring device 70, a supporting device 80 and a positioning member 90, the stirring device 70 includes a stirring shaft 71 and a driving source 72, the driving source 72 is disposed on an upper portion of the grinding cylinder 10, one end of the stirring shaft 71 is connected to the driving source 72, the other end of the stirring shaft 71 is suspended in the grinding cylinder 10, the supporting device 80 is disposed on an upper portion of the grinding cylinder 10 to support the stirring shaft 71, and the positioning member 90 is connected to the suspended end of the stirring shaft 71. When a mill is used, the grinding media 60 at least partially surrounds the circumference of the spacer 90.

The grinding machine is a vertical grinding machine, grinding media and materials are filled in a grinding cylinder, the stirring shaft is driven to rotate through a driving source, the stirring shaft rotates to enable the materials and the grinding media to move, the materials are ground to required granularity under the repeated grinding effect of the grinding media, and finally the materials are discharged from a discharge hole of the grinding cylinder through a filter screen. The upper end of the stirring shaft is stabilized through the supporting device, the upper end of the stirring shaft is prevented from deviating in the rotating process, and the positioning piece is used for reducing the deviation of the lower end of the stirring shaft in the rotating process.

Furthermore, because the grinding media are under the action of gravity, a part of grinding media can gradually settle to the bottom of the grinding cylinder, that is, the number of the grinding media at the bottom of the grinding cylinder is higher than the density of other positions of the grinding cylinder, the bottom grinding media which are not stirred are kept relatively static, the grinding media at least partially surround the periphery of the positioning piece, the relatively dense grinding media are utilized to limit the deviation of the positioning piece, the positioning effect of the positioning piece is enhanced, and the deviation of the lower end of the stirring shaft is further reduced.

In an embodiment of the present application, referring to fig. 4, 5 and 9, the stirring device 70 includes a plurality of stirrers 73, each stirrer 73 includes a mounting seat 731, a plurality of stirring rods 732 and a plurality of stirring blades 733, the mounting seat 731 has a hollow mounting channel 731a, the plurality of stirring rods 732 are spaced at an outer periphery of the mounting seat 731, one end of each stirring rod 732 is connected to the mounting seat 731, the other end of each stirring rod 732 is connected to a corresponding stirring blade 733, and each stirrer 73 is installed to the stirring shaft 71 through the mounting channel 731 a.

Set up a plurality of puddlers and a plurality of stirring vane on the mount pad, install stirring vane on the mount pad through the puddler, firstly, be convenient for adjust stirring vane's installation angle, secondly, the puddler makes stirring vane be close to the grinding vessel lateral wall more, stirring range is wider, furthermore, the puddler is littleer than the space that occupies in stirring vane, under the condition that makes stirring vane be close to the grinding vessel inner wall more, make material and grinding medium have bigger stirring space, make the stirring more abundant, grinding medium and material mix more evenly.

In one embodiment of the present application, referring to fig. 9, the agitator blades 733 of the agitator 73 near one end of the agitator shaft 71 are configured to push the grinding media 60 toward the other end of the agitator shaft 71.

The mill is a vertical mill, and referring to fig. 9, for example, the blades 733 of the agitator 73 near the upper end of the agitating shaft 71 are arranged to push the grinding medium 60 downward, the blades 733 of the agitator 73 near the lower end of the agitating shaft 71 are arranged to push the grinding medium 60 upward, or the blades 733 of the agitator 73 near the upper end of the agitating shaft 71 are arranged to push the grinding medium 60 downward, and the blades 733 of the agitator 73 near the lower end of the agitating shaft 71 are arranged to push the grinding medium 60 upward.

By the aid of the design, excessive grinding media are prevented from flowing to the top or the bottom of the vertical grinding mill, so that the grinding media are distributed around the stirrer more uniformly, and the grinding media and materials are fully contacted and ground in the range of the stirrer.

Specifically, in an embodiment, referring to fig. 1, a grinding cylinder 10 of the vertical grinder is provided with a feed inlet 11 and a discharge outlet 12, wherein the feed inlet 11 is disposed at a lower part of the grinding cylinder 10, and the discharge outlet 12 is disposed at an upper part of the grinding cylinder 10. The mode of material adoption lower extreme feeding upper end ejection of compact promptly, the stirring vane's of the agitator that is close to the (mixing) shaft upper end meeting the material face slope setting up, and the vortex that stirring vane formed drives grinding medium downwards. The material that is located grinding chamber upper portion moves from lower supreme under the pressure effect, because the material is after grinding, and the material particle diameter that is close to the (mixing) shaft upper end is less, and grinding medium is great relatively, because meet the material face and tilt up the setting, stirring vane forms decurrent vortex, drives solid-state grinding medium and material mixture downwards. The influence of the pressure in the grinding cylinder on the solid grinding medium is small, the grinding medium which is wrapped by the material and moves upwards is relatively slow in upward movement speed and relatively small in inertia under the action of the gravity of the grinding medium, and the grinding medium can move downwards more quickly under the action of the vortex easily. Although the material can move downwards under the action of the vortex, compared with the grinding medium, the material still keeps moving upwards at a higher speed due to the fact that the material is smaller in particle size and lighter in weight and is less influenced by downward driving of the vortex. Therefore, the material on the upper part of the grinding cavity moves from bottom to top under the action of pressure, the grinding medium moves downwards under the action of self gravity and vortex, and the material and the grinding medium are gradually separated. The material facing surface of the stirring blade of the stirrer close to the lower end of the stirring shaft is arranged in a downward inclined mode, and the grinding medium is driven upwards by the stirring blade. The material facing surface is obliquely arranged downwards to form an upward vortex, the material positioned at the lower part of the grinding cavity moves from bottom to top under the action of pressure, and the grinding medium moves upwards under the action of the vortex. When the grinding machine is used for grinding the natural asphalt mixed slurry in the liquid state or other liquid materials, the liquid materials have viscosity, the influence of pressure in the grinding cylinder on the solid grinding media is small, the influence of pressure in the grinding cylinder on the materials in the fluid state is large, the grinding media which are wrapped by the materials and move upwards are lower in upward movement speed and smaller in inertia compared with the upward movement speed of the materials, therefore, the grinding media positioned on the upper portion of the grinding cylinder can move downwards under the action of downward vortex more easily, the grinding media positioned on the lower portion of the grinding cylinder move upwards along with the action of the materials and the upward vortex, and the grinding media can be better suspended in the materials.

Specifically, in another embodiment, if the material takes the form of feeding from the upper end and discharging from the lower end, the material facing surface of the stirring blade of the stirrer near the upper end of the stirring shaft is inclined upward, the grinding medium is driven downward by the vortex formed by the stirring blade, and the grinding medium is driven downward by the action of the gravity of the grinding medium and the vortex formed by the stirring blade, and the material moves downward due to the feeding from the upper end. The material facing surface of the stirring blade of the stirrer close to the lower end of the stirring shaft is arranged in a downward inclined mode, and the mixture is continuously driven upwards by the vortex formed by the stirring blade. The mixture of the material and the grinding medium is continuously driven downwards, the grinding medium is contacted with the stirring blade close to the lower end of the stirring shaft, and the grinding medium is driven upwards by the vortex formed by the stirring blade close to the lower end of the stirring shaft. When the grinding machine is used for grinding natural asphalt mixed slurry in a liquid state or other materials in a fluid state, the materials in the fluid state have viscosity, the influence of pressure in the grinding cylinder on solid grinding media is small, the influence of pressure in the grinding cylinder on the materials in the fluid state is large, the grinding media which are wrapped by the materials and move downwards are slower in downward movement speed and smaller in inertia compared with the movement speed of the materials, and therefore the grinding media positioned at the lower part of the grinding cylinder easily move upwards under the action of upward vortex. The grinding media located in the upper part of the grinding cylinder move downwards under the action of the downward vortex, so that the grinding media can be better suspended in the material.

It will be appreciated that the agitator adjacent one end of the agitator shaft is configured to push grinding media towards the other end of the agitator shaft, and that there may be one agitator, two, or more, for example three, four or five.

The material facing surface of the stirring blade is the surface of the stirring blade which is formed along the rotation direction of the stirring shaft and extrudes materials towards the axial direction of the stirring shaft. Herein, "pressing material axially of the mixer shaft" is understood to mean at least a component of the force pressing the material axially of the mixer shaft. For example, if the material receiving surface is arranged obliquely downwards, the stirring blades form extrusion force components for the materials to axially and radially upwards and outwards the stirring shaft; the material facing surface is obliquely arranged upwards, and then the stirring blades form extrusion component force for the materials to axially and radially outwards the stirring shaft.

In one embodiment of the present application, referring to fig. 9, the stirring vanes 733 of the stirrer 73 located between the two ends of the stirring shaft 71 are configured to purely rotationally propel the grinding media 60. This kind of design avoids grinding medium upwards or downstream under the effect of the agitator that is located between the both ends of (mixing) shaft for grinding medium and material mix together and collide the friction repeatedly mutually in above-mentioned agitator within range, and grinding medium and material fully contact grinding in the agitator within range.

Specifically, the stirring blades of the stirrer positioned between the two ends of the stirring shaft are horizontally arranged, and the horizontally arranged stirring blades purely rotate to push the grinding medium.

The grinding medium in the embodiment of the application can be one or more of a round ball, a circular table, a cylindrical ball and a short round rod, and the grinding medium can be made of cast iron, alloy, aluminum oxide, silicon carbide or ceramic.

The positioning piece in the embodiment of the application can be a circular truncated cone, and the bottom surface of the circular truncated cone is arranged downwards. The bottom surface of the circular truncated cone is arranged downwards, so that a larger contact surface with the stirring shaft is ensured, and the installation is convenient; and the grinding medium deposited at the bottom exerts downward acting force on the peripheral side surface of the positioning piece, so that the positioning effect is better.

The positioning member in the embodiment of the present application may also be a cone, and the bottom surface of the cone is disposed upward. The cone positioning piece has good centering effect. The bottom surface of the cone is arranged upwards, the contact area with the stirring shaft is large, and the installation is convenient.

It will be appreciated that when the above-described grinding mill is used for grinding a mixed slurry of a natural asphalt, the grinding drum 10 is required to be heated so that the mixed slurry of natural asphalt is maintained as a viscous liquid at a certain temperature, and therefore, the grinding mill may further include a heat conducting means 100 for heating the grinding drum 10, the heat conducting means being configured to transfer heat to the inside of the grinding drum 10.

In an embodiment of the present application, please refer to fig. 2 and 4, the grinding cylinder 10 includes an outer cylinder 13 and an inner cylinder 14 which are arranged at an interval, the heat conduction device 100 includes an oil guide cavity 100a formed between the outer cylinder 13 and the inner cylinder 14, the outer cylinder 13 is provided with an oil inlet 13a and an oil outlet 13b which are respectively communicated with the oil guide cavity 100a, heat conduction oil enters the oil guide cavity 100a from the oil inlet 13a, and the heat conduction oil transfers the temperature to the inner cylinder 14 and then to the inside of the grinding cylinder 10 in the process of circumferential spiral flow of the heat conduction oil in the oil guide cavity 100a, so as to maintain the temperature of the natural asphalt mixture slurry. The heat conduction device may further include a heat conduction oil pipe wound outside the grinding cylinder 10, and high temperature heat conduction oil flows in the heat conduction oil pipe, and transfers heat to the natural asphalt mixed slurry to keep the natural asphalt mixed slurry in a liquid state.

It is understood that the grinding machine provided by the embodiment of the application can also be used for other materials needing to be ground, including other materials needing to be ground by heating.

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 all the changes or substitutions should 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 (10)

1. The grinding machine is characterized by comprising a grinding cylinder, a wear-resistant lining and a connecting piece, wherein the grinding cylinder is used for containing grinding media, the wear-resistant lining covers the inner wall of the grinding cylinder, a counter bore is formed in the wear-resistant lining, the connecting piece fixes the wear-resistant lining on the inner wall of the grinding cylinder through the counter bore, the distance between a first end face inside the grinding cylinder and a second end face inside the grinding cylinder, close to the connecting piece, of the counter bore is A, and A is larger than 0.

2. A grinding mill according to claim 1, characterized in that 5mm ≦ A ≦ 10 mm.

3. A grinding mill according to claim 1, wherein each wear resistant lining comprises a plurality of projections towards the interior of the grinding drum.

4. A grinding mill according to claim 3, wherein a plurality of the projections are arranged in an array or staggered;

and/or the height of a plurality of said protrusions is equal or unequal.

5. A grinding mill according to claim 1, wherein the grinding vessel inner wall is circular in cross-section, the wear-resistant lining is plate-shaped, and a plurality of the wear-resistant linings form a regular polygon inscribed in the grinding vessel in the cross-sectional direction of the grinding vessel;

or the cross section of the inner wall of the grinding cylinder is circular, the wear-resistant linings are arc-shaped, and the plurality of wear-resistant linings form a circle shape inscribed in the grinding cylinder along the cross section direction of the grinding cylinder.

6. A grinding mill according to claim 5, wherein the number of wear resistant linings is 6 to 10 along the cross-section of the grinding drum.

7. A grinding mill according to claim 1, wherein a spacer is provided between adjacent two of the wear liners;

and/or a gasket is arranged at the joint of the connecting piece and the wear-resistant lining.

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

the stirring device comprises 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 with 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;

and the positioning piece is connected with one end of the stirring shaft suspension.

9. A grinding mill according to claim 8 wherein said agitator means comprises a plurality of agitators, each said agitator comprising a mounting block, a plurality of agitator bars and a plurality of agitator blades, said mounting block having a hollow mounting channel, a plurality of said agitator bars being spaced apart around the periphery of said mounting block, one end of each said agitator bar being connected to said mounting block and the other end of each said agitator bar being connected to a respective said agitator blade, each said agitator being cooperatively mounted with said agitator shaft via said mounting channel.

10. A grinding mill according to claim 9, wherein the stirring blades of the stirrer near one end of the stirring shaft are configured to push the grinding media towards the other end of the stirring shaft;

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

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