CN116237126A

CN116237126A - Vertical sand mill

Info

Publication number: CN116237126A
Application number: CN202310440410.7A
Authority: CN
Inventors: 赵国忠; 赵海波
Original assignee: Wuxi Haibo Powder Equipment Co ltd
Current assignee: Wuxi Haibo Powder Equipment Co ltd
Priority date: 2023-04-23
Filing date: 2023-04-23
Publication date: 2023-06-09

Abstract

The invention relates to the technical field of vertical sand mills, in particular to a vertical sand mill which comprises a vertical bracket, a sand grinding cylinder and a stirring device, wherein the sand grinding cylinder comprises a cylinder body, an upper cover and a lower cover which are arranged at the upper end and the lower end of the cylinder body, a sand grinding medium feeding hole is formed in the upper cover, and a material feeding hole and a slag discharging hole are formed in the lower cover; the vertical bracket is provided with a lifting driving device capable of driving the cylinder body to vertically lift and move and a rotary driving device capable of driving the stirring device to rotate. The sanding machine can realize discharging and synchronously filter the sanding medium, so that the problem that the secondary filtration rate operation is easy to cause material pollution is avoided; the sand grinding medium can not be reduced at the moment of stopping feeding, and the material reduction is limited, so that the processing precision can be effectively improved, and the qualification rate of products is improved; the modularized blade and the rotating shaft are assembled, welding is not needed, and the maintenance is easy.

Description

Vertical sand mill

Technical Field

The invention relates to the technical field of vertical sand mills, in particular to a vertical sand mill.

Background

A sanding machine is a device that relies primarily on the high-speed rotational action between the sanding medium and the material to perform the sanding operation. Shearing, extruding and friction force are generated through intense movement between the sanding media, so that materials among the sanding media are stressed to deform and generate stress fields, and when the stress reaches the yield or fracture limit of the material particles, the materials are plastically deformed or crushed.

Wherein the interaction between the sanding medium and the material is achieved by means of a stirring device mounted in a sanding cylinder of a sanding machine.

Most of the existing sand mills do not have the function of synchronous discharging and filtering, and sand grinding media (such as zirconium beads and the like) participating in sand grinding can be filtered and separated from materials in the discharging process. But the secondary filtering operation is carried out after the materials are collected, so that the production cost is increased intangibly, the efficiency is low, and the risk of the materials being polluted after sanding is increased.

On the other hand, because each time sand grinding has strict proportion requirement to sand grinding medium and material, but in the course of practice, when the feeding stops in the twinkling of an eye, influenced by gravity, the department reflux phenomenon can take place for sand grinding medium and material in the barrel for in some sand grinding medium and material can flow back the inlet pipe, in intangible messenger's proportion received the influence, and then also can exert an influence to the precision of sand grinding.

Moreover, the conventional stirring device adopts a mode of welding the rotating shaft and the paddles, and the structure is simple, but after long-term use, the paddles deform and break, so that potential safety hazards are brought to production, and the stirring device is not easy to maintain; often, the welding part is easy to stay with materials, is not easy to clean, and can pollute sanding of different materials next time.

Therefore, a new technical solution is urgently needed to solve the above-mentioned existing technical problems.

Disclosure of Invention

The invention aims to solve the problems of the prior art, and provides a vertical sand mill which can effectively solve the technical problems that in the prior art, discharging and filtering cannot be synchronous, excessive proportion unbalance is easily caused by a backflow phenomenon when feeding is stopped, blades are easy to damage, the working efficiency is affected, and the processing cost is increased.

The above purpose is realized by the following technical scheme:

the vertical sand mill comprises a vertical support, a sand mill cylinder and a stirring device, wherein the sand mill cylinder comprises a cylinder body, an upper cover and a lower cover, the upper cover and the lower cover are arranged at the upper end and the lower end of the cylinder body, a sand medium feeding hole is formed in the upper cover, and a material feeding hole and a slag discharging hole are formed in the lower cover; the vertical bracket is provided with a lifting driving device capable of driving the cylinder body to vertically lift and move and a rotary driving device capable of driving the stirring device to rotate;

the stirring device comprises a rotating shaft and a blade assembly which are mutually sleeved, one end of the rotating shaft is connected with the rotating driving device, the other end of the rotating shaft penetrates through the upper cover and then stretches into the cylinder, and the blade assembly is positioned in the cylinder; the rotary shaft is provided with a material conveying channel, the material conveying channel comprises a material conveying inlet and a material conveying outlet, and a filtering assembly is arranged at the material conveying inlet and used for filtering the sanding medium;

the material feed inlet department is provided with sand grinding medium anti-reflux mechanism for prevent after the feeding is accomplished that sand grinding medium from flowing back to the inlet pipe.

Further, a rotating shaft supporting frame is further arranged on the vertical support, the rotating shaft supporting frame can vertically support the rotating shaft, and the upper cover is connected with the rotating shaft supporting frame.

Further, the upper cover is in an inverted T shape, a sealing opening matched with a sealing element is formed along the axis position of the upper cover, and the sealing element can be plugged into the sealing opening to realize sealing; a rotating shaft channel through which a rotating shaft can penetrate is formed along the axis position of the sealing piece, the rotating shaft can rotate relative to the rotating shaft channel, a first flange bearing seat which can be sleeved with the rotating shaft is arranged at the outer port of the rotating shaft channel, and the first flange bearing seat is connected with the rotating shaft support frame;

the rotary shaft support frame comprises a first cross rod, a second cross rod and a third cross rod which are parallel to each other from top to bottom, the upper cover is connected with the third cross rod, the sealing element is connected with the second cross rod through the first flange bearing seat, and the first cross rod is connected with the second flange bearing seat which can be sleeved with the rotary shaft;

and a sheath for the rotating shaft is also arranged between the first flange bearing seat and the second flange bearing seat.

Further, the lifting driving device comprises a screw rod vertically arranged on the vertical support, two ends of the screw rod are respectively and movably sleeved through screw rod seats, a screw rod sliding seat matched with the screw rod is sleeved on the screw rod, the screw rod sliding seat is connected with a cylinder support through a screw rod connecting rod, and the cylinder support is connected with the cylinder;

the lifting sliding rail is vertically arranged on the vertical support, a plurality of lifting sliding blocks are arranged on the lifting sliding rail, and the lifting sliding blocks are connected with the cylinder support;

the end part of the screw rod is connected with a speed reducer, and the screw rod sliding seat can indirectly drive the cylinder body to vertically lift under the driving of the speed reducer, so that the cylinder body and the upper cover are separated or covered.

Further, the rotary driving device comprises a belt pulley assembly and a motor, wherein the belt pulley assembly and the motor are horizontally arranged on a cross beam at the top of the vertical support, the belt pulley assembly comprises a first belt pulley connected with the rotary shaft and a second belt pulley connected with the motor, a belt is arranged between the first belt pulley and the second belt pulley, and the motor is connected with the cross beam.

Further, the cylinder body comprises an inner cylinder body and an outer cylinder body which are sleeved inside and outside, after the upper cover and the lower cover are sealed, a liquid cooling cavity is formed between the inner cylinder body and the outer cylinder body, and an upper liquid outlet and a lower liquid inlet which can be communicated with the liquid cooling cavity are formed in the outer cylinder body.

Further, the blade assembly can be sleeved with the rotating shaft and comprises a plurality of blade modules, and adjacent blade modules are spliced through a splicing mechanism;

the blade module comprises an annular body and a cylindrical stop lever, the annular body is used for being sleeved with the rotating shaft, and the cylindrical stop lever is vertically connected with the outer wall of the annular body;

the splicing mechanism comprises an annular groove and an annular boss, wherein the annular groove is formed in the lower side of the annular body, and the annular boss is arranged on the upper side of the annular body; when the adjacent 2 annular bodies are spliced, the annular grooves of the upper annular body are sleeved on the annular bosses of the lower annular body;

the blade assembly is made of a corrosion-resistant and wear-resistant material, and the blade assembly is made of ceramic.

Further, the annular body is connected with the rotating shaft through a locking mechanism and is used for preventing the annular body sleeved on the rotating shaft from freely rotating; the locking mechanism is a limiting convex strip longitudinally arranged along the outer wall of the rotating shaft, and correspondingly, a limiting groove matched with the limiting convex strip is formed in the inner wall of the rotating shaft.

Further, the filtering assembly comprises a drainage disc, a rotating disc and a rotating cover plate which are arranged between the blade assembly and the upper cover; the drainage disc, the rotary disc and the rotary cover plate are sleeved with the rotary shaft and are mutually connected to form a filter cavity into which materials can enter, and the material conveying inlet is positioned in the filter cavity;

the drainage disc is horn-shaped, and a plurality of drainage grooves are formed in the side wall of the drainage disc in an equidistant manner;

the rotary disc is annular, protruding parts and recessed parts are formed at intervals along the circumferential direction and are arranged in a staggered mode, the outer surfaces of the protruding parts protrude out of the outer surfaces of the recessed parts, and each recessed part is respectively communicated with a filtering groove hole;

a gap is formed between the outer peripheral surface of the rotary cover plate and the inner wall of the cylinder body, and a plurality of concave guide grooves are formed on the upper surface of the rotary cover plate in a extending mode from the center to the outer periphery and are used for guiding the moving direction of the sanding medium;

the center of the rotary cover plate is penetrated to form a mounting hole for the rotary shaft to penetrate, the upper surface of the rotary cover plate protrudes from the periphery of the mounting hole to form an annular stop ring, and the guide groove extends from the periphery of the stop ring in an outward sunken manner; one ends, close to the center, of the guide grooves are matched to form an annular material distributing groove; the oblique extension of dividing chute is formed with many and equally divide the groove along the array of hoop, equally divide in the groove keep away from divide the one end of silo with rotatory apron with the clearance that forms between the barrel link up mutually.

Further, the back flow prevention mechanism for the sanding medium comprises a baffle plate, wherein a plurality of through holes are formed in the baffle plate, and the aperture of each through hole is smaller than the outer diameter of the sanding medium; the baffle is circular and is positioned on the same axis with the circle center of the material feeding hole; the through holes are circumferentially arranged on the baffle plate; a first annular cavity groove and a second annular cavity groove are respectively arranged on two sides of the baffle, the first annular cavity groove is positioned between the baffle and the material feeding port, and the second annular cavity groove extends to the outer side wall of the lower cover; the diameters of the first annular cavity groove, the second annular cavity groove and the baffle are the same, and the circle centers of the first annular cavity groove, the second annular cavity groove and the baffle are positioned on the same axis; the outer side of the lower cover is provided with a material pipe joint corresponding to the material feeding hole, the material pipe joint comprises a feeding channel concentric with the material feeding hole, and the inner diameter of the feeding channel is smaller than that of the second annular cavity groove.

Advantageous effects

The vertical sand mill provided by the invention has the advantages of simple structure, easiness in control and maintenance and the following advantages:

1. the sand grinding medium can be synchronously filtered while discharging is realized, so that the problem that the secondary filtration rate operation is easy to cause material pollution is avoided;

2. the sand grinding medium can not be reduced at the moment of stopping feeding, and the material reduction is limited, so that the processing precision can be effectively improved, and the qualification rate of products is improved;

3. the modularized blade and the rotating shaft are assembled, welding is not needed, and the maintenance is easy.

Drawings

FIG. 1 is a schematic view of a vertical sand mill according to the present invention;

FIG. 2 is a cross-sectional view of a sand mill barrel and internal components of a vertical sand mill according to the present invention;

FIG. 3 is an exploded view of a sand mill cylinder in a vertical sand mill according to the present invention;

FIG. 4 is a schematic view of a first view angle of a filter assembly of a vertical sand mill according to the present invention;

FIG. 5 is a schematic view of a second view angle of a filter assembly of a vertical sand mill according to the present invention;

FIG. 6 is a schematic view of a mechanism for preventing backflow of sanding medium in a vertical sander according to the present invention;

FIG. 7 is a schematic view of a mechanism for preventing backflow of sanding medium in a vertical sander according to the present invention;

FIG. 8 is a schematic view of a first view angle of the lower cover of the vertical sand mill according to the present invention;

FIG. 9 is a schematic view of a second view angle of the lower cover of the vertical sand mill according to the present invention;

FIG. 10 is a schematic view of a third view angle of the lower cover of the vertical sand mill according to the present invention;

FIG. 11 is a schematic view of a blade assembly in a vertical sand mill according to the present invention;

FIG. 12 is a schematic view of a first view angle of a blade module in a vertical sand mill according to the present invention;

FIG. 13 is a schematic view of a second view angle of a blade module in a vertical sand mill according to the present invention;

FIG. 14 is a schematic view of a structure of a spacing rib in a vertical sand mill according to the present invention;

fig. 15 is a schematic view of a limiting groove structure in a vertical sand mill according to the present invention.

The graphic indicia:

1-a vertical bracket, 11-a rotary shaft supporting frame, 12-a first cross bar, 13-a second cross bar, 14-a third cross bar and 15-a cross bar;

2-sand grinding cylinder, 21-cylinder, 22-upper cover, 23-lower cover, 24-sand grinding medium feed inlet, 25-material feed inlet, 26-slag discharge port, 27-upper liquid outlet, 28-lower liquid inlet, 29-inner cylinder, 210-outer cylinder and 211-liquid cooling cavity;

3-stirring device, 31-rotating shaft, 32-blade assembly, 33-material conveying channel, 34-material conveying inlet, 35-material conveying outlet, 36-sealing piece, 37-sealing port, 38-rotating channel, 39-first flange bearing seat, 310-second flange bearing seat, 311-rotating shaft sheath, 312-blade module, 313-annular body, 314-cylindrical stop lever, 315-annular groove, 316-annular boss, 317-limit convex strip, 318-limit groove;

the device comprises a 4-lifting driving device, a 41-screw rod, a 42-screw rod seat, a 43-screw rod sliding seat, a 44-screw rod connecting rod, a 45-cylinder bracket, a 46-lifting sliding rail, a 47-lifting sliding block and a 48-speed reducer;

5-rotation driving means, 51-belt, 52-motor, 53-first pulley, 54-second pulley;

6-filtering components, 61-drainage discs, 62-rotating discs, 63-rotating cover plates, 64-filtering cavities, 65-drainage grooves, 66-protruding parts, 67-recessed parts, 68-filtering groove holes, 69-guiding grooves, 610-mounting holes, 611-stop rings, 612-distributing grooves and 613-equally distributing grooves;

7-sanding medium backflow prevention mechanism, 71-baffle, 72-through hole, 73-first annular cavity, 74-second annular cavity, 75-material pipe joint, 76-feeding channel.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. The described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1, the vertical sand mill comprises a vertical bracket 1, a sand mill cylinder 2 and a stirring device 3, wherein the vertical bracket 1 is used as a supporting body of the machine, and a side plate can be installed outside to form a box body; the sanding cartridge 2 provides a sealed sanding environment for the sanding medium and material; the stirring device 3 is used for stirring the sand grinding medium and the material mixture in the sand grinding cylinder 2.

The sand grinding cylinder 2 comprises a cylinder body 21, an upper cover 22 and a lower cover 23 which are arranged at the upper end and the lower end of the cylinder body 21, wherein a sand grinding medium feeding port 24 is arranged on the upper cover 22, and a material feeding port 24 and a slag discharging port 26 are arranged on the lower cover 23; the vertical bracket 1 is provided with a lifting driving device 4 capable of driving the cylinder 21 to vertically lift and fall and a rotary driving device 5 capable of driving the stirring device 3 to rotate.

Specifically, under the action of the lifting driving device 4, the sanding cylinder 2 is in a vertically suspended state, a predetermined amount of sanding medium is injected into the cylinder 21 through the sanding medium feeding hole 24 at the top, a predetermined amount of material is input into the cylinder 21 through the material feeding hole 24 at the bottom, then sufficient sanding is performed under the action of the stirring device, and the sanded material is output after a predetermined time, so that next sanding is performed.

As shown in fig. 1 and 2, in this embodiment, the stirring device 3 includes a rotating shaft 31 and a paddle assembly 32 that are sleeved with each other, one end of the rotating shaft 31 is connected to the rotation driving device 5, the other end penetrates through the upper cover 22 and then extends into the cylinder 21, and the paddle assembly 32 is located in the cylinder 21; a feed channel 33 is provided on the rotating shaft 31, the feed channel 33 comprises a feed inlet 34 and a feed outlet 35, and in order to prevent the grinding media in the mixture from being discharged during discharging, a filter assembly 6 is provided at the feed inlet 34 for filtering the grinding media.

Specifically, the sanded material continues to enter the feed channel 33 along the feed inlet 34 and discharge the sanded acceptable material into the outer container along the feed outlet 35 under the rotational force of the paddle assembly 32.

In this embodiment, the sand grinding medium may be zirconium beads, and the material may be viscous liquid or solution such as ink.

When the first stage work is completed and secondary feed sanding is required, in order to prevent the sanding medium from flowing back into the feed pipe when the feed is stopped, the device is provided with a sanding medium backflow preventing mechanism 7 at the material feed inlet 25.

As shown in fig. 2, the vertical support 1 is further provided with a rotation shaft support 11, the rotation shaft support 11 can vertically support the rotation shaft 31, and the upper cover 22 is connected with the rotation shaft support 11.

The upper cover 22 is in an inverted T shape, a sealing opening 37 matched with the sealing element 36 is formed along the axial center position of the upper cover 22, and the sealing element 36 can be plugged into the sealing opening 37 to realize sealing.

A rotating shaft channel 38 through which the rotating shaft 31 can pass is formed along the axial center position of the sealing member 36, the rotating shaft 31 can rotate relative to the rotating shaft channel 38, a first flange bearing seat 39 capable of sleeving the rotating shaft 31 is formed at the outer port of the rotating shaft channel 38, and the first flange bearing seat 39 is connected with the rotating shaft support frame 11;

specifically, the rotary shaft supporting frame 11 includes a first cross bar 12, a second cross bar 13 and a third cross bar 14 that are parallel to each other from top to bottom, the upper cover 22 is connected to the third cross bar 14, the sealing member 36 is connected to the second cross bar 13 through the first flange bearing seat 39, and the first cross bar 12 is connected to a second flange bearing seat 310 that can be sleeved with the rotary shaft 31;

the sheath 311 for the rotation shaft is further disposed between the first flange bearing seat 39 and the second flange bearing seat 310, so that the exposure range of the rotation shaft 31 to the outside can be reduced as far as possible, and the potential safety hazard of the rotation shaft 31 in motion to the operator can be prevented.

As shown in fig. 1, in this embodiment, the lifting driving device 4 includes a screw rod 41 vertically disposed on the vertical support 1, two ends of the screw rod 41 are movably sleeved with a screw rod seat 42, a screw rod sliding seat 43 matched with the screw rod 41 is sleeved with the screw rod 41, the screw rod sliding seat 43 is connected with a cylinder support 45 through a screw rod connecting rod 44, and the cylinder support 45 is connected with the cylinder 21;

the vertical type vertical support comprises a vertical support body 1, and is characterized by further comprising a lifting slide rail 46 vertically arranged on the vertical support body 1, wherein a plurality of lifting slide blocks 47 are arranged on the lifting slide rail 46, and the lifting slide blocks 47 are connected with the cylinder body support 45;

the end of the screw 41 is connected to a speed reducer 48.

Working principle: under the driving of the speed reducer 48, the screw rod sliding seat 46 may indirectly drive the cylinder 21 to vertically lift, so as to separate or cover the cylinder 21 from or cover the upper cover 22.

The device generally needs to separate the cylinder 21 from the upper cover 22 when materials with different specifications are required to be sanded, so that residual impurities in the cylinder 21 can be removed more thoroughly, or the cylinder 21 or the blade assembly 32 with different specifications can be replaced, and the cylinder 21 and the upper cover 22 can be separated through the lifting driving device 4 when the blade assembly 32 is maintained or replaced.

The upper cover 22 and the seal 36 are typically left intact throughout the process.

The efficiency of the above operation can be effectively improved by the lifting drive device 4.

As shown in fig. 1, the rotation driving device 5 in this embodiment includes a pulley assembly and a motor 52 horizontally provided on a cross member 15 at the top of the vertical support 1.

Wherein, the belt pulley assembly includes a first belt pulley 53 connected with the rotation shaft 31, and a second belt pulley 54 connected with the motor 52, a belt 51 is provided between the first belt pulley 53 and the second belt pulley 54, and the motor 52 is fixedly connected with the cross beam 15.

Working principle:

when the motor 52 is started, the belt 51 is indirectly driven to drive the rotary shaft 31 to rotate vertically, so as to drive the paddle assembly 32 in the cylinder 21 to rotate synchronously.

Since a lot of heat is generated in the cylinder 21 during operation, the material may be deformed due to the excessive temperature, and the device is optimized as follows:

as shown in fig. 2, the cylinder 21 includes an inner cylinder 29 and an outer cylinder 210 that are sleeved inside and outside, a liquid cooling cavity 211 is formed between the inner cylinder 29 and the outer cylinder 210 after the upper cover 22 and the lower cover 23 are sealed, and an upper liquid outlet 27 and a lower liquid inlet 28 that can be communicated with the liquid cooling cavity 211 are provided on the outer cylinder 210.

Specifically, the external cooling liquid enters the liquid cooling cavity 211 through the lower liquid inlet 28, and is discharged outwards from the upper liquid inlet 27 when the liquid cooling cavity 211 is filled up to the position of the upper liquid outlet 27; whether input or output, are connected to external hydraulic devices through pipes, respectively.

As shown in fig. 11 to 13, the paddle assembly 32 may be sleeved on the rotating shaft 31, and includes a plurality of paddle modules 312, and adjacent paddle modules 312 are spliced by a splicing mechanism;

specifically, the paddle module 312 includes an annular body 313 and a cylindrical stop rod 314, the annular body 313 is used for sleeving the rotating shaft 31, and the cylindrical stop rod 314 is vertically connected with the outer wall of the annular body 313;

the splicing mechanism comprises an annular groove 315 arranged on the lower side of the annular body 313, and an annular boss 316 arranged on the upper side of the annular body 315; when the adjacent 2 annular bodies 313 are spliced, the annular grooves 315 of the upper annular body 313 are sleeved on the annular bosses 316 of the lower annular body 313.

The blade assembly 32 in this embodiment is formed of a corrosion and wear resistant material, such as ceramic.

As shown in fig. 14 and 15, as an optimization of the connection of the blade assembly 32 and the rotating shaft 31 in the present embodiment, the annular body 313 is connected with the rotating shaft 31 through a locking mechanism, so as to prevent the annular body 313 sleeved on the rotating shaft 31 from freely rotating; the locking mechanism is a limit protrusion 317 longitudinally arranged along the outer wall of the rotation shaft 31, and a limit groove 318 matching with the limit protrusion 317 is correspondingly formed on the inner wall of the rotation shaft 31.

As shown in fig. 3 to 5, the filter assembly 6 in this embodiment includes a drainage tray 61, a rotating tray 62, and a rotating cover plate 63 disposed between the blade assembly 32 and the upper cover 22; the drainage disc 61, the rotating disc 62 and the rotating cover plate 63 are all sleeved with the rotating shaft 31, and form a filter cavity 64 for materials to enter after being connected with each other, and the material conveying inlet 34 is positioned in the filter cavity 64, specifically:

the drainage disc 61 is horn-shaped, and a plurality of drainage grooves 65 are arranged on the side wall at equal intervals;

the rotating disc 62 is annular, protruding portions 66 and recessed portions 67 are formed at intervals in the circumferential direction and are arranged in a staggered mode, the outer surfaces of the protruding portions 66 protrude out of the outer surfaces of the recessed portions 67, and each recessed portion 67 is provided with a through hole 68; the filter slots 68 have a smaller diameter than the outer diameter of the sanding medium and effectively block the sanding medium.

A gap is formed between the outer circumferential surface of the rotary cover 63 and the inner wall of the cylinder 21, and a plurality of recessed guide grooves 69 are formed on the upper surface extending from the center to the outer circumference, and the guide grooves 69 are used for guiding the moving direction of the sanding medium.

Specifically, the extending direction of the guide groove 69 forms an included angle with the radial direction of the rotary cover plate 63, that is, by such a setting mode, the guide groove 69 is obliquely extended, so that the length of the guide groove 69 can be further prolonged, the zirconium beads have a certain moving path, the problem that the zirconium beads are easy to aggregate and drop simultaneously due to too short moving path is avoided, and a plurality of zirconium beads which simultaneously fall into the guide groove 69 can be better dispersed.

A mounting hole 610 for the rotation shaft 31 to penetrate is formed through the center of the rotation cover 63, an annular stop ring 611 is formed on the upper surface of the rotation cover 63 by protruding from the outer periphery of the mounting hole 610, and the guide groove 69 is recessed and extended outwards from the outer periphery of the stop ring 611; one end, close to the center, of the guide grooves 69 is matched with a distribution groove 612 formed into an annular shape; the oblique extension of the material dividing groove 612 forms a plurality of equally dividing grooves 613 which are arranged along the circumferential array, and one end of the equally dividing groove 613, which is far away from the material dividing groove 612, is communicated with a gap formed between the rotary cover plate 63 and the cylinder 21.

The zirconium beads falling onto the rotary cover plate 63 will preferentially enter the distributing groove 612, and along with the rotation of the rotary cover plate 63, the zirconium beads will respectively enter one of the equally dividing grooves 613 under the action of centrifugal force and further fall into the cylinder 21 through the gap, so that the dispersion and falling of the zirconium beads are effectively realized.

As shown in fig. 6 to 10, in order to prevent the sanding medium from flowing back to the feeding pipe due to the influence of gravity after the feeding is stopped, and further to influence the sanding effect due to the reduction of the predetermined amount of the sanding medium, the device is further provided with a sanding medium backflow prevention mechanism 7 at the material feeding port.

Specifically, the back-flow prevention mechanism 7 for the sanding medium comprises a baffle 71, wherein a plurality of through holes 72 are formed in the baffle 71, and the aperture of the through holes 72 is smaller than the outer diameter of the sanding medium; the baffle 71 is circular and is located on the same axis as the center of the material inlet 25.

As an optimization of the sanding medium backflow prevention mechanism 7, the through holes 72 are circumferentially arranged on the baffle plate 71; a first annular cavity groove 73 and a second annular cavity groove 74 are respectively arranged on two sides of the baffle plate 71, the first annular cavity groove 73 is positioned between the baffle plate 71 and the material feeding hole 25, and the second annular cavity groove 74 extends to the outer side wall of the lower cover 23;

in this embodiment, the diameters of the first annular groove 73, the second annular groove 74 and the baffle 71 are the same, and the centers of the first annular groove 73, the second annular groove 74 and the baffle 71 are located on the same axis.

Specifically, the baffle 71 separates the material inlet 25 into an inner part and an outer part, when feeding is needed, the material can only pass through the through hole 72 for feeding, and when feeding is stopped, under the action of gravity, the part of the sanding medium and the material at the material inlet 25 of the cylinder 21 can be refluxed, the material can be discharged outwards through the through hole 72, and when zirconium beads (the sanding medium is preferably zirconium beads in the embodiment) are pulled to the through hole 72, the corresponding through hole 72 is blocked due to the fact that the outer diameter of the zirconium beads is larger than the aperture of the through hole 72, at this time, not only the zirconium beads can not be removed, but also the zirconium beads can be effectively ensured not to be discharged outwards along the through hole 72 due to the fact that the zirconium beads block the through hole.

In this embodiment, the baffle 71 is circular and is located on the same axis as the center of the material inlet 25; the baffle 71 may be integrally formed with the lower cover 23.

Because the center of the backflow is located on the central axis of the material inlet 25, in order to effectively drain the sanding medium and the material, in this embodiment, the through holes 72 are circumferentially arranged on the baffle 71 with the center of the baffle 71, and when the sanding medium and the material mixture collide with the central position of the baffle 71 under the action of gravity, the mixture is uniformly dispersed around, and is smoothly drained into the circumferentially arranged through holes 72.

A material pipe joint 75 corresponding to the material inlet 25 is arranged on the outer side of the lower cover 23, the material pipe joint 75 comprises a material inlet channel 76 coaxial with the material inlet 25, and the inner diameter of the material inlet channel 76 is smaller than that of the second annular cavity 74.

Specifically, the through-hole 72 does not intersect the downward extending line of the material inlet 25 and intersects the upward extending line portion of the feed channel 76, which further ensures that the amount of material that is returned is minimized.

The principle is as follows: when the feeding is stopped, part of the material remains in the clamping groove formed by the second annular cavity groove 74 and the material pipe joint 75, and the lower part of the through hole 72 is partially blocked; when the reflux occurs, part of the materials firstly enter the through hole 72, but the space reserved below the through hole 72 is reduced, so that the materials in the through hole are not easy to discharge; even if the discharge is successful, the discharge of the material can be further prevented due to the blocking of the through hole 72 by the zirconium beads.

The above description is for the purpose of illustrating the embodiments of the present invention and is not to be construed as limiting the invention, but is intended to cover all modifications, equivalents, improvements and alternatives falling within the spirit and principle of the invention.

Claims

1. The vertical sand mill comprises a vertical support, a sand mill cylinder and a stirring device, and is characterized in that the sand mill cylinder comprises a cylinder body, an upper cover and a lower cover, wherein the upper cover and the lower cover are arranged at the upper end and the lower end of the cylinder body, a sand medium feeding hole is formed in the upper cover, and a material feeding hole and a slag discharging hole are formed in the lower cover; the vertical bracket is provided with a lifting driving device capable of driving the cylinder body to vertically lift and move and a rotary driving device capable of driving the stirring device to rotate;

2. The vertical sand mill of claim 1, wherein a rotating shaft support is further provided on the vertical support, the rotating shaft support can vertically support the rotating shaft, and the upper cover is connected with the rotating shaft support.

3. The vertical sand mill according to claim 2, wherein the upper cover is inverted T-shaped, a sealing opening matched with a sealing element is formed along the axial center of the upper cover, and the sealing element can be plugged into the sealing opening to realize sealing; a rotating shaft channel through which a rotating shaft can penetrate is formed along the axis position of the sealing piece, the rotating shaft can rotate relative to the rotating shaft channel, a first flange bearing seat which can be sleeved with the rotating shaft is arranged at the outer port of the rotating shaft channel, and the first flange bearing seat is connected with the rotating shaft support frame;

4. The vertical sand mill according to claim 1, wherein the lifting driving device comprises a screw rod vertically arranged on the vertical support, two ends of the screw rod are respectively movably sleeved with a screw rod seat, a screw rod sliding seat matched with the screw rod is sleeved on the screw rod, the screw rod sliding seat is connected with a cylinder support through a screw rod connecting rod, and the cylinder support is connected with the cylinder;

5. A vertical sand mill according to claim 1, characterized in that the rotary drive means comprise a pulley assembly and a motor arranged horizontally on a cross beam at the top of the vertical support, the pulley assembly comprising a first pulley connected to the rotary shaft and a second pulley connected to the motor, a belt being arranged between the first pulley and the second pulley, the motor being connected to the cross beam.

6. The vertical sand mill according to claim 1, wherein the cylinder comprises an inner cylinder and an outer cylinder which are sleeved inside and outside, a liquid cooling cavity is formed between the inner cylinder and the outer cylinder after the upper cover and the lower cover are sealed, and an upper liquid outlet and a lower liquid inlet which can be communicated with the liquid cooling cavity are arranged on the outer cylinder.

7. The vertical sand mill according to claim 1, wherein the blade assembly is sleeved with the rotating shaft and comprises a plurality of blade modules, and adjacent blade modules are spliced through a splicing mechanism;

the blade assembly is made of a corrosion-resistant and wear-resistant material.

8. The vertical sand mill according to claim 7, wherein the annular body is connected with the rotating shaft through a locking mechanism, so as to prevent the annular body sleeved on the rotating shaft from freely rotating; the locking mechanism is a limiting convex strip longitudinally arranged along the outer wall of the rotating shaft, and correspondingly, a limiting groove matched with the limiting convex strip is formed in the inner wall of the rotating shaft.

9. The vertical sand mill of claim 1 wherein the filter assembly comprises a drain pan, a rotating pan, and a rotating cover plate disposed between the blade assembly and the upper cover; the drainage disc, the rotary disc and the rotary cover plate are sleeved with the rotary shaft and are mutually connected to form a filter cavity into which materials can enter, and the material conveying inlet is positioned in the filter cavity;

10. The vertical sand mill of claim 1 wherein the sand grinding medium backflow prevention mechanism comprises a baffle plate, wherein a plurality of through holes are formed in the baffle plate, and the aperture of the through holes is smaller than the outer diameter of the sand grinding medium; the baffle is circular and is positioned on the same axis with the circle center of the material feeding hole; the through holes are circumferentially arranged on the baffle plate; a first annular cavity groove and a second annular cavity groove are respectively arranged on two sides of the baffle, the first annular cavity groove is positioned between the baffle and the material feeding port, and the second annular cavity groove extends to the outer side wall of the lower cover; the diameters of the first annular cavity groove, the second annular cavity groove and the baffle are the same, and the circle centers of the first annular cavity groove, the second annular cavity groove and the baffle are positioned on the same axis; the outer side of the lower cover is provided with a material pipe joint corresponding to the material feeding hole, the material pipe joint comprises a feeding channel concentric with the material feeding hole, and the inner diameter of the feeding channel is smaller than that of the second annular cavity groove.