CN220328814U - Precoated sand grinding and crushing device - Google Patents

Abstract

The application relates to the field of precoated sand production and processing, in particular to a precoated sand grinding and crushing device, which comprises a device box body, wherein a feeding hopper is arranged at the top of the device box body, a discharge hole is arranged at the bottom of the device box body, and the device further comprises a grinding and crushing mechanism, a blowing mechanism and a screening mechanism; the grinding and crushing mechanism comprises a grinding disc, a grinding seat and a driving assembly for driving the grinding disc to reciprocate, and the circumferential wall of the grinding disc is abutted to the top of the grinding seat and is in rolling fit with the grinding seat; the grinding seat is fixedly arranged on the device box body, the feeding hopper faces the grinding seat, the blowing mechanism is arranged beside the grinding seat and faces the grinding seat, and the screening mechanism is arranged below the grinding seat. The utility model provides a grind crushing mechanism adopts the grinding dish and grinds seat crushing crushed aggregates, compares in the correlation technique, grinds the crushing more abundant, and production efficiency is higher, has optimized the technical problem among the correlation technique properly.

Description

Precoated sand grinding and crushing device

Technical Field

The application relates to the field of precoated sand production and processing, in particular to a precoated sand grinding and crushing device.

Background

The precoated sand is a modeling material with excellent performance, mainly adopts high-quality carefully-selected natural quartz sand as a raw material, is doped with reinforcing agents such as thermoplastic phenolic resin and the like, and is finally processed and molded according to a certain production process; the precoated sand has the advantages of high strength, good distraction, high temperature resistance, uniform shell layers and the like, and is widely applied to the fields of casting, steel smelting, building materials and the like.

During precoated sand processing, grinding and crushing treatment is required to be carried out on the precoated sand raw sand so as to ensure that the granularity of the precoated sand raw sand meets the subsequent processing requirement, and a precoated sand crushing and screening device is generally selected to carry out crushing treatment on the precoated sand raw sand in the related technology; the precoated sand crushing and screening equipment generally comprises a feed hopper, a pair of crushing rollers, a driving assembly for driving the crushing rollers to rotate relatively and a screen, wherein during crushing, an operator pours precoated sand raw sand from the feed hopper, the precoated sand raw sand is crushed by the crushing rollers, and then the precoated sand raw sand enters the screen for screening.

With respect to the related art in the above, the inventors found that: the precoated sand has the advantages of high raw sand hardness, high particle strength, selection of paired crushing rollers for crushing in the related technology, sequential passing of the crushing rollers, extrusion crushing of the precoated sand only when passing between the crushing rollers, insufficient crushing time, poor crushing effect and low production efficiency.

Disclosure of Invention

In order to optimize the problem that precoated sand crushing apparatus is low to precoated sand crushing efficiency among the correlation technique, this application provides a precoated sand grinding and crushing device.

The application provides a precoated sand grinds reducing mechanism adopts following technical scheme:

the precoated sand grinding and crushing device comprises a device box body, wherein a feed hopper is arranged at the top of the device box body, a discharge hole is arranged at the bottom of the device box body, and the precoated sand grinding and crushing device further comprises a grinding and crushing mechanism, a blowing mechanism and a screening mechanism; the grinding and crushing mechanism comprises a grinding disc, a grinding seat and a driving assembly for driving the grinding disc to reciprocate, and the circumferential wall of the grinding disc is abutted to the top of the grinding seat and is in rolling fit with the grinding seat; the grinding seat is fixedly arranged on the device box body, the feeding hopper faces the grinding seat, the blowing mechanism is arranged beside the grinding seat and faces the grinding seat, and the screening mechanism is arranged below the grinding seat.

Through adopting above-mentioned technical scheme, the device during operation, tectorial membrane sand raw sand gets into from the feeder hopper, grinds through grinding crushing mechanism afterwards: the precoated sand raw sand falls onto the top wall of the grinding disc, at the moment, the driving assembly drives the grinding disc to reciprocate, the circumferential wall of the grinding disc rolls back and forth on the top wall of the grinding seat, and good grinding and crushing effects are achieved on the precoated sand raw sand; when the grinding is sufficient, the blowing mechanism blows the precoated sand raw sand on the top wall of the grinding disc down to the screening mechanism, and the screening mechanism can screen the precoated sand raw sand with different particle diameters to screen out the precoated sand raw sand meeting the processing requirements; the utility model provides a grind crushing mechanism adopts the grinding dish and grinds seat crushing crushed aggregates, compares in the correlation technique, grinds the crushing more abundant, and production efficiency is higher, has properly optimized the technical problem among the correlation technique.

In a specific implementation mode, the driving assembly comprises a rotary table, a limit column, a connecting ring, a pair of sliding rods and a driving motor, wherein the driving motor is fixedly connected in a device box body, the rotary table is fixedly connected with a motor shaft of the driving motor in a coaxial way, the limit column is eccentrically and fixedly connected to the side wall of the rotary table, which is away from the driving motor, and the connecting ring is sleeved on the limit column and is in sliding fit with the limit column; the device comprises a box body, a rotating disc, a sliding rod, a connecting ring, a sliding rod, a connecting ring and a connecting rod, wherein the box body is provided with a pair of sliding seats, the pair of sliding seats are horizontally and oppositely arranged at two sides of the rotating disc, the sliding rod is in sliding fit with the sliding seats, the length direction of the sliding rod is kept horizontal, the length direction of the connecting ring is vertical to the sliding rod, and the end wall of the sliding rod is fixedly connected with the center of the outer side wall of the connecting ring; the center of the grinding disc is rotatably arranged at the bottom of the connecting ring.

Through adopting above-mentioned technical scheme, when the bucker and the cooperation of rolling seat work, driving motor drives the carousel and rotates, spacing post rotates under the rotation of carousel, the outer wall of spacing post produces the butt force to the inner wall of go-between this moment, because spacing post and go-between sliding fit, and the go-between passes through slide bar and slide seat and carousel rotate to be connected, so the go-between is under the butt effect of spacing post, along the length direction reciprocating motion of slide bar, thereby drive bucker reciprocating motion, bucker's center department rotates with the go-between to be connected, so bucker reciprocal roll on the roof of rolling seat, play good rolling and grinding effect to tectorial membrane sand raw sand. The carousel, spacing post, go-between, slide bar and the seat of sliding of this application mutually support, turn into driving motor's rotation and roll of rolling the dish on the seat of rolling, and the structure is ingenious, and the drive is convenient.

In a specific implementation mode, the blowing mechanism comprises a blowing nozzle, an air duct, a compression air pump and a timing sensor for controlling intermittent switching of the compression air pump, wherein the compression air pump is fixedly arranged in a device box body, one end of the air duct is fixedly connected and communicated with the compression air pump, and the other end of the air duct is fixedly connected and communicated with the blowing nozzle; one end of the blowing nozzle, which is far away from the air duct, faces to the top of the grinding seat, and the blowing nozzle is fixedly connected in the device box body.

Through adopting above-mentioned technical scheme, when grinding dish and rolling seat with the preliminary sand of tectorial membrane sand grind abundant after, the timing sensor transmits the instruction to the compression air pump, and then the compression air pump is opened, blows in the air cock with compressed gas through the air duct, and the air cock blows up the preliminary sand of tectorial membrane sand that grinds abundant on the rolling seat roof, accomplishes the unloading. The utility model provides an air duct, compression air pump, blowing mouth and timing sensor cooperation can be high-efficient with the tectorial membrane sand raw sand on the pan blow off to screening mechanism, and blow the material full-automatic, have increased the work efficiency of device.

In a specific possible embodiment, the screening mechanism comprises a screen frame, a screen, at least two buffer connection assemblies and a vibration assembly for driving the screen frame to vibrate; the screen cloth is paved on the screen frame; the edge of the screen mesh is adhered to the inner wall of the screen frame and fixedly connected with the inner wall of the screen frame; the screen frame is obliquely arranged and is arranged in the device box body through the buffer connection assembly; the bottom of the device box body is provided with a finished product cavity and a cavity to be ground, the finished product cavity is positioned below the screen mesh and communicated with the discharge port, and the lower side of the screen frame extends into the cavity to be ground.

By adopting the technical scheme, after the precoated sand raw sand is blown down from the grinding seat through the blowing mechanism, the precoated sand raw sand falls onto the screen due to self gravity, and at the moment, the vibration assembly drives the screen frame and the screen to vibrate, so that the precoated sand raw sand which accords with the processing production falls into a finished product cavity after passing through meshes of the screen; because the sieve frame is obliquely arranged, the precoated sand with larger grain size rolls along the sieve mesh and finally falls into the cavity to be ground to wait for further processing.

In a specific implementation mode, the bottom walls of the screen frames close to the corners are provided with mounting cylinders, and the buffer connection assembly comprises a fixed rod and a buffer spring; the mounting cylinder is sleeved on the fixing rod, the end wall of the fixing rod, which is positioned on the mounting cylinder, is abutted against one end of the buffer spring, and the other end of the buffer spring is fixedly connected in the mounting cylinder; one end of the fixed rod, which is far away from the mounting cylinder, is fixedly connected to the device box body.

By adopting the technical scheme, when the vibration component drives the screen frame to vibrate, the fixed rod is matched with the mounting cylinder to play a role in fixing the screen frame so as to ensure that the screen can stably screen the precoated sand raw sand; meanwhile, the buffer spring plays a role in buffering the exciting force of vibration, so that the probability of damage of the screen frame is reduced.

In a specific embodiment, the vibration assembly includes a pair of vibration motors, a pair of which are fixedly mounted on the upper side of the frame.

Through adopting above-mentioned technical scheme, when a pile of vibrating motor syntropy opposition set up, the transverse exciting force offsets each other to a certain extent, and fore-and-aft exciting force transmits to screen frame and screen cloth to play the screening effect to tectorial membrane sand raw sand.

In a specific embodiment, a collecting hopper is arranged in the cavity to be ground, and the lower side of the screen frame extends into the collecting hopper; the bottom of the collecting hopper extends out of the device box body, a material returning mechanism is arranged outside the device box body, and the discharge end of the collecting hopper faces to the material returning mechanism.

Through adopting above-mentioned technical scheme, when the raw sand of tectorial membrane sand is sieved through screening mechanism, the great raw sand of tectorial membrane sand of granule rolls down to the collecting hopper at the vibration of screen frame and screen cloth, and the collecting hopper is collected and is transmitted to returning charge mechanism to the raw sand of tectorial membrane sand, and returning charge mechanism is again with the raw sand of tectorial membrane sand that waits to grind to the feeder hopper, by grinding dish and grinding seat grinding crushing again, so reciprocating, until the specification of the raw sand of tectorial membrane sand all accords with the construction requirement.

In a specific implementation, the material returning mechanism comprises a material collecting vessel, a material feeding cylinder, a spiral blade, a rotating shaft and a material feeding motor for driving the rotating shaft to rotate, wherein the material discharging end of the material collecting vessel extends into the material collecting vessel; the feeding cylinder is fixedly connected to the device box body; the feeding cylinder is sleeved on the rotating shaft, the spiral blades are fixedly connected to the rotating shaft, and the side walls of the spiral blades, which are far away from the rotating shaft, are attached to the inner wall of the feeding cylinder and can slide relative to the inner wall of the feeding cylinder; the feeding barrel is suspended above the collecting vessel, a port at the top of the feeding barrel is higher than the feeding hopper, a discharging groove is formed in the side wall, close to the top, of the feeding barrel, a guide tube is fixedly communicated with the notch of the discharging groove, and the guide tube is obliquely arranged and is arranged at the lower end of the guide tube to extend into the feeding hopper.

By adopting the technical scheme, the precoated sand raw sand falling from the discharge end of the collecting hopper enters the collecting vessel; during operation of the returning mechanism, the feeding motor drives the rotating shaft to rotate, the rotating shaft drives the helical blade to rotate, and as the helical blade is attached to the inner wall of the feeding cylinder and can slide relatively, precoated sand in the collecting vessel is transported to the discharge chute under the action of the helical blade and the feeding cylinder, then the precoated sand raw sand is transported to the guide pipe through the discharge chute at the top of the feeding cylinder under the centrifugal action, enters the feeding hopper under the guide action of the guide pipe, and is ground and crushed again through the grinding disc and the grinding seat until the specification of the precoated sand raw sand meets the construction requirement.

In summary, the present application includes at least one of the following beneficial technical effects:

compared with the related art, the grinding and crushing mechanism adopts the grinding disc and the grinding seat to crush the crushed aggregates, so that the grinding and crushing are more sufficient, the production efficiency is higher, and the technical problems in the related art are properly optimized;

according to the rotary table, the limiting column, the connecting ring, the sliding rod and the sliding seat are matched with each other, the rotation of the driving motor is converted into the rolling of the grinding disc on the grinding seat, the structure is ingenious, and the driving is convenient;

according to the precoated sand screening device, the air duct, the compression air pump, the air blowing nozzle and the timing sensor are matched, so that precoated sand on the grinding disc can be efficiently blown down to the screening mechanism, and the blowing is fully automatic, so that the working efficiency of the device is improved;

this application has add returning charge mechanism for the tectorial membrane sand raw sand that does not accord with the construction requirement can be smashed the screening repeatedly, and labour saving and time saving has increased the production efficiency of the device.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a precoated sand grinding and pulverizing device according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a precoated sand mill pulverizer of an embodiment of the present application;

FIG. 3 is a partial schematic view of a structure for embodying the mating relationship of the drive assembly and the grinding pan, and the grinding base;

FIG. 4 is a schematic view of a partial structure for embodying the connection relationship between the vibration assembly, the buffer connection assembly and the screen frame, the screen;

fig. 5 is an enlarged schematic view of the portion a in fig. 4.

Reference numerals illustrate: 1. a device case; 11. a partition plate; 12. a cavity to be ground; 13. a finished product cavity; 14. a feed hopper; 15. a discharge port; 2. a grinding and crushing mechanism; 21. a grinding disc; 211. a connecting shaft; 22. grinding the base; 221. milling a groove; 23. a drive assembly; 231. a turntable; 232. a limit column; 233. a connecting ring; 234. a slide bar; 235. a sliding seat; 236. a driving motor; 3. a blowing mechanism; 31. an air blowing nozzle; 32. an air duct; 33. a compression air pump; 34. a timing sensor; 4. a screening mechanism; 41. a screen frame; 42. a screen; 43. a buffer connection assembly; 431. a mounting cylinder; 432. a buffer spring; 433. a fixed rod; 434. a mounting block; 44. a vibration assembly; 441. a vibration motor; 5. a returning charge mechanism; 51. a collection vessel; 52. a feeding cylinder; 521. a discharge chute; 53. a helical blade; 54. a rotating shaft; 55. a feeding motor; 56. a guide tube; 6. and (5) collecting hoppers.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-5.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The embodiment of the application discloses a precoated sand grinding and crushing device. Referring to fig. 1, the precoated sand grinding and crushing device comprises a device box body 1, a grinding and crushing mechanism 2, a blowing mechanism 3, a screening mechanism 4 and a returning mechanism 5; the top of the device box body 1 is provided with a feed hopper 14 for feeding coated sand raw sand, and the bottom of the device box body 1 is provided with a discharge port 15 for discharging the ground and sieved coated sand raw sand; the grinding and crushing mechanism 2 is arranged below the feed hopper 14, so that the raw sand of the coated sand fed is convenient to grind and crush; the blowing mechanism 3 is arranged beside the grinding and crushing mechanism 2 and faces the grinding and crushing mechanism 2, so that the precoated sand fully ground and crushed is conveniently blown; the screening mechanism 4 is arranged at the bottom of the grinding and crushing mechanism 2, so that the precoated sand raw sand fully ground and crushed is conveniently screened; the returning mechanism 5 is used for transporting precoated sand raw sand which is large in particle and does not meet production requirements to the feed hopper 14, and carrying out secondary grinding, crushing and screening.

Referring to fig. 2 and 3, the grinding and pulverizing mechanism 2 includes a grinding pan 21, a grinding base 22, and a driving assembly 23, the driving assembly 23 for driving the grinding pan 21 to reciprocate; the grinding disc 21 is in sliding fit with the inner wall of the device box body 1; the grinding seat 22 is fixedly connected inside the device box body 1, and the grinding seat 22 is horizontally arranged, so that the grinding seat is convenient to be matched with the grinding disc 21 to grind and crush the precoated sand raw sand; the top wall of the grinding seat 22 is concavely provided with a grinding groove 221, and the length direction of the grinding groove 221 is the same as the length direction of the grinding disc 21; the grinding disc 21 is rotatably installed on the driving assembly 23, and the peripheral wall of the grinding disc 21 is abutted in the bottom wall of the grinding groove 221, and when the precoated sand raw sand is ground and crushed, the peripheral wall of the grinding disc 21 is in rolling fit with the bottom wall of the grinding groove 221; the feeding direction faces the grinding seat 22, so that the precoated sand raw sand is crushed and ground conveniently.

Referring to fig. 3, the driving assembly 23 includes a turntable 231, a limiting column 232, a connection ring 233, two sliding bars 234, a pair of sliding seats 235, and a driving motor 236, wherein the driving motor 236 is a stepping motor, so that the rolling of the grinding wheel 21 is stably driven; the center of the grinding disc 21 is fixedly connected with a connecting shaft 211 in a penetrating way, and one end of the connecting shaft 211, which is close to the connecting ring 233, is rotatably connected with the inner side wall of the connecting ring 233, which is close to the bottom, through a bearing (not shown in the figure); the limiting column 232 is arranged in the connecting ring 233 in a penetrating way and is in sliding abutting connection with the connecting ring 233; the limiting column 232 is fixedly connected to one surface of the turntable 231 facing the connecting ring 233, and the connection between the limiting column 232 and the turntable 231 is positioned at the position, close to the edge, of the turntable 231, so that the grinding disc 21 can conveniently rotate in a reciprocating manner within a larger range; the pair of sliding seats 235 are fixedly arranged on the device box body 1, and the connecting line of the axes of the pair of sliding seats 235 is vertical to the length direction of the connecting ring 233 and passes through the circle center of the turntable 231; two sliding rods 234 are in one-to-one correspondence and sliding fit with a pair of sliding seats 235, and one end of each sliding rod 234 extending to the connecting ring 233 is fixedly connected with the center of the peripheral wall of the connecting ring 233; the center of the surface of the turntable 231, which faces away from the connecting ring 233, is fixedly connected with a motor shaft of the driving motor 236, a motor casing of the driving motor 236 is fixedly connected in the device box 1, a power supply for the driving motor 236 to work is arranged in the device box 1, and the driving motor 236 is electrically connected with the power supply.

Referring to fig. 1 and 2, the blowing mechanism 3 includes a pair of blowing nozzles 31, two air ducts 32, a compression air pump 33, and a timing sensor 34, the timing sensor 34 being used to control the intermittent on and off of the compression air pump 33; the pump body of the compression air pump 33 is fixedly arranged in the device box body 1, and the air outlet of the compression air pump 33 is communicated with and fixedly connected with the air guide pipe 32; the air blowing nozzles 31 are in one-to-one correspondence with the air ducts 32; one end of the air duct 32, which is far away from the air outlet of the compression air pump 33, is communicated with and fixedly connected with the air blowing nozzle 31, and one end of the air blowing nozzle 31, which is far away from the compression air pump 33, faces the grinding groove 221; the two blowing nozzles 31 are symmetrically distributed about the geometric center of the grinding disc 21, so that the precoated sand raw sand which is sufficiently ground and crushed can be conveniently blown off from two sides; the device box 1 is internally provided with a power supply for the timing sensor 34 to work, and the timing sensor 34 is electrically connected with the power supply.

Referring to fig. 2, a partition plate 11 is vertically arranged at the bottom of the device box 1, and the partition plate 11 divides the bottom inner cavity of the device box 1 into a finished cavity 13 and a cavity to be ground 12; a collecting hopper 6 is fixedly arranged in the cavity 12 to be ground, so that the precoated sand raw sand which is large in particles and cannot meet the construction requirement can be conveniently collected and reprocessed; the bottom of the finished product cavity 13 is communicated with the discharge port 15, and precoated sand raw sand screened by the screening mechanism 4 can enter the discharge port 15 through the finished product cavity 13 to enter the next production process; the screening mechanism 4 comprises a screen frame 41, a screen 42, a buffer connection assembly 43 and a vibration assembly 44, wherein the buffer connection assembly 43 plays a role in buffering and fixing the screen frame 41 in the device box 1, and the vibration assembly 44 is used for driving the screen frame 41 and the screen 42 to vibrate so as to screen precoated sand raw sand conveniently; the screen frame 41 is connected to the device box 1 in an inclined way through the buffer connection assembly 43, the whole screen frame 41 is suspended at the top of the finished product cavity 13, and the lower side of the screen frame 41 extends into the collecting hopper 6; the screen 42 is filled and paved in the screen frame 41, and the edge of the screen 42 is fixedly connected with the inner wall of the screen frame 41; the vibration assembly 44 drives the screen frame 41 and the screen 42 to vibrate, and plays a role in screening the precoated sand raw sand.

Referring to fig. 2 and 4, the side wall of the screen frame 41 close to one side of the collection hopper 6 is tilted so as to reduce the possibility that the precoated sand raw sand slides out of the collection hopper 6; the bottom of the collecting hopper 6 extends out of the device box body 1, so that the subsequent material returning treatment of the material returning mechanism 5 is facilitated.

Referring to fig. 2 and 4, the vibration assembly 44 includes a pair of vibration motors 441 having the same type and the same power, the vibration motors 441 are fixedly installed at one side of the screen frame 41 far from the collecting hopper 6, and the pair of vibration motors 441 are symmetrical with respect to the symmetry axis of the screen frame 41 along the length direction thereof, so that the transverse exciting force during vibration is conveniently offset to a greater extent, and the stability of the device during operation is ensured; a power supply for operating the vibration motor 441 is provided in the device case 1, and a pair of vibration motors 441 are electrically connected to the power supply.

Referring to fig. 4 and 5, the bottom walls of the screen frames 41 near the corners are provided with mounting cylinders 431, and the axial direction of the mounting cylinders 431 is vertically downward, so that the screen frames 41 are stably fixed; the buffer connection assembly 43 comprises a fixed rod 433 and a buffer spring 432, and the fixed rod 433, the buffer spring 432 and the mounting cylinder 431 are in one-to-one correspondence; one end of the fixed rod 433 is fixedly connected to the inner wall of the device box 1 through the mounting block 434, and the other end of the fixed rod 433 penetrates through the mounting cylinder 431; one end of the buffer spring 432 is fixedly connected to the bottom wall of the mounting cylinder 431, and the other end of the buffer spring 432 is abutted against the end wall of one end of the fixing rod 433 extending into the mounting cylinder 431, so that a buffer protection effect is facilitated.

Referring to fig. 2, the returning mechanism 5 includes a collecting vessel 51, a feeding cylinder 52, a helical blade 53, a rotating shaft 54, and a feeding motor 55, wherein the feeding motor 55 is used for driving the rotating shaft 54 to rotate; the aggregate vessel 51 is fixedly arranged outside the device body 1, and the blanking end of the aggregate hopper 6 extends into the aggregate vessel 51 so as to ensure that precoated sand raw sand which does not meet the construction requirements in the aggregate hopper 6 can smoothly enter the aggregate vessel 51; the feeding cylinder 52, the helical blade 53, the rotating shaft 54 and the feeding motor 55 are all arranged right above the collecting vessel 51 in a suspending manner, so that the precoated sand raw sand is conveniently fed and regrind; the motor shell of the feeding motor 55 is fixedly arranged outside the device box body 1, the motor shaft of the feeding motor 55 is vertically downward and is fixedly connected with the rotating shaft 54 coaxially, and one end of the rotating shaft 54, which is far away from the feeding motor 55, extends to the center of the bottom of the collecting vessel 51, so that feeding is facilitated; the spiral blades 53 are fixedly connected with the rotating shaft 54, and are spirally distributed on the peripheral wall of the rotating shaft 54, and the spiral blades 53 close to the bottom of the rotating shaft 54 extend to be flush with the end wall of the rotating shaft 54 all the time so as to ensure smooth feeding; the upper charging barrel 52 is sleeved on the rotating shaft 54 and the spiral blade 53, and the side wall of the spiral blade 53 far away from the rotating shaft 54 is attached to the upper charging barrel 52; when the feeding motor 55 drives the rotating shaft 54 to rotate, the spiral blades 53 can slide relative to the inner wall of the feeding cylinder 52 so as to ensure smooth feeding of the precoated sand; the feeding cylinder 52 is fixedly arranged on the outer wall of the device box body 1; the device box body 1 is provided with a power supply for rotating the feeding motor 55, and the feeding motor 55 is electrically connected with the power supply.

Referring to fig. 2, a discharge chute 521 is sleeved on the peripheral wall of the upper charging barrel 52 near the top, and the discharge chute 521 is higher than the feed hopper 14, so as to ensure that the precoated sand raw sand can be smoothly fed; a guide pipe 56 is fixedly connected to the upper charging barrel 52, one end of the guide pipe 56 is communicated with the discharging chute 521, and the other end extends into the feeding hopper 14; the guide tube 56 is inclined at a lower end of the guide tube extending into the feed hopper 14 to ensure that the coated sand stock enters the feed hopper 14 under its own weight.

The implementation principle of the precoated sand grinding and crushing device provided by the embodiment of the application is as follows: when the device works, the feeding motor 55, the driving motor 236, the compression air pump 33 and the timing sensor 34 are all in an on state; the precoated sand raw sand enters the device box body 1 from the feed hopper 14 and falls into the grinding groove 221 on the top wall of the grinding seat 22 under the action of self gravity, at the moment, the driving motor 236 drives the turntable 231 to rotate, the limiting column 232 is fixedly connected with the turntable 231, so that the limiting column 232 rotates under the action of the turntable 231, at the moment, the outer peripheral wall of the limiting column 232 has an abutting action on the inner wall of the connecting ring 233, and the limiting column 232 is in sliding connection with the connecting ring 233, and the connecting ring 233 is in sliding connection with the sliding seat 235 through the sliding rod 234, so that the connecting ring 233 reciprocates along the length direction of the sliding rod 234 under the abutting action of the limiting column 232 to drive the grinding disc 21 to reciprocate in the grinding groove 221 to grind and crush the precoated sand;

when the grinding disc 21 and the grinding seat 22 grind the precoated sand raw sand sufficiently, the timing sensor 34 transmits an instruction to the compression air pump 33, the compression air pump 33 is started, air is pressed into the air blowing nozzle 31 through the air duct 32, the air blowing nozzle 31 blows the precoated sand raw sand sufficiently ground in the grinding groove 221 onto the screen 42, and then the timing sensor 34 transmits a closing instruction to the compression air pump 33;

when the coated sand raw sand falls onto the screen 42, the pair of vibration motors 441 drive the screen 42 and the screen frame 41 to vibrate, so that the coated sand raw sand vibrates on the screen 42; the precoated sand raw sand with particles meeting construction requirements falls into a finished product cavity 13, is discharged from a discharge port 15, and enters the next processing procedure; the precoated sand raw sand which is large in particles and does not meet the construction requirements rolls off from the surface of the screen 42 and is conveyed into an aggregate vessel 51 through a collecting hopper 6;

the feeding motor 55 drives the rotating shaft 54 to rotate, the rotating shaft 54 drives the spiral blades 53 to rotate, so that the precoated sand in the collecting vessel 51 rises, the precoated sand is discharged from the top discharge chute 521 of the feeding cylinder 52, enters the feed hopper 14 through the inclined guide pipe 56, is crushed and ground again through the grinding disc 21 and the grinding seat 22 until the construction requirement is met, and is discharged from the discharge hole 15.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. The utility model provides a tectorial membrane sand grinds reducing mechanism, includes device box (1), device box (1) top is equipped with feeder hopper (14), and the bottom is equipped with discharge gate (15), its characterized in that: the device also comprises a grinding and crushing mechanism (2), a blowing mechanism (3) and a screening mechanism (4); the grinding and crushing mechanism (2) comprises a grinding disc (21), a grinding seat (22) and a driving assembly (23) for driving the grinding disc (21) to reciprocate, wherein the circumferential wall of the grinding disc (21) is abutted to the top of the grinding seat (22) and is in rolling fit with the grinding seat (22); the grinding seat (22) is fixedly arranged on the device box body (1), the feeding hopper (14) faces the grinding seat (22), the blowing mechanism (3) is arranged beside the grinding seat (22) and faces the grinding seat (22), and the screening mechanism (4) is arranged below the grinding seat (22).

2. The precoated sand grinding and pulverizing device according to claim 1, wherein: the driving assembly (23) comprises a turntable (231), a limit column (232), a connecting ring (233), a pair of sliding rods (234) and a driving motor (236), wherein the driving motor (236) is fixedly connected in the device box body (1), the turntable (231) is fixedly connected with a motor shaft of the driving motor (236) in a coaxial mode, the limit column (232) is eccentrically and fixedly connected to the side wall, deviating from the driving motor (236), of the turntable (231), and the connecting ring (233) is sleeved on the limit column (232) and is in sliding fit with the limit column (232); the device comprises a device box body (1), wherein a pair of sliding seats (235) are arranged on the device box body (1), the sliding seats (235) are horizontally and oppositely arranged at two sides of a turntable (231), a sliding rod (234) is in sliding fit with the sliding seats (235), the length direction of the sliding rod (234) is kept horizontal, the length direction of a connecting ring (233) is perpendicular to the sliding rod (234), and the end wall of the sliding rod (234) is fixedly connected to the center of the outer side wall of the connecting ring (233); the center of the grinding disc (21) is rotatably arranged at the bottom of the connecting ring (233).

3. The precoated sand grinding and pulverizing device according to claim 1, wherein: the blowing mechanism (3) comprises a blowing nozzle (31), an air duct (32), a compression air pump (33) and a timing sensor (34) for controlling intermittent switching of the compression air pump (33), wherein the compression air pump (33) is fixedly arranged in the device box body (1), one end of the air duct (32) is fixedly connected and communicated with the compression air pump (33), and the other end of the air duct is fixedly connected and communicated with the blowing nozzle (31); one end of the air blowing nozzle (31) far away from the air duct (32) faces to the top of the grinding seat (22), and the air blowing nozzle (31) is fixedly connected in the device box body (1).

4. The precoated sand grinding and pulverizing device according to claim 1, wherein: the screening mechanism (4) comprises a screen frame (41), a screen (42), at least two buffer connection components (43) and a vibration component (44) for driving the screen frame (41) to vibrate; the screen (42) is paved on the screen frame (41); the edge of the screen (42) is adhered to the inner wall of the screen frame (41) and fixedly connected with the inner wall of the screen frame; the screen frame (41) is obliquely arranged, and the screen frame (41) is arranged in the device box body (1) through the buffer connection assembly (43); the bottom of device box (1) is equipped with finished product chamber (13) and waits to grind chamber (12), finished product chamber (13) are located the below of screen cloth (42) and communicate with discharge gate (15), the lower one side of screen frame (41) extends into wait to grind chamber (12).

5. The precoated sand grinding and pulverizing device according to claim 4, wherein: the bottom wall, close to the corner, of the screen frame (41) is provided with mounting cylinders (431), and the buffer connection assembly (43) comprises a fixed rod (433) and a buffer spring (432); the mounting cylinder (431) is sleeved on the fixing rod (433), the end wall of the fixing rod (433) is positioned on the mounting cylinder (431) and is abutted against one end of the buffer spring (432), and the other end of the buffer spring (432) is fixedly connected in the mounting cylinder (431); one end of the fixed rod (433) far away from the mounting cylinder (431) is fixedly connected to the device box body (1).

6. The precoated sand grinding and pulverizing device according to claim 4, wherein: the vibration assembly (44) comprises a pair of vibration motors (441), and the pair of vibration motors (441) are fixedly arranged on the higher side of the screen frame (41) relatively.

7. The precoated sand grinding and pulverizing device according to claim 4, wherein: a collecting hopper (6) is arranged in the cavity (12) to be ground, and the lower side of the screen frame (41) extends into the collecting hopper (6); the bottom of the collecting hopper (6) extends out of the device box body (1), a material returning mechanism (5) is arranged outside the device box body (1), and the discharge end of the collecting hopper (6) faces to the material returning mechanism (5).

8. The precoated sand grinding and pulverizing device according to claim 7, wherein: the material returning mechanism (5) comprises a material collecting vessel (51), a material feeding barrel (52), a spiral blade (53), a rotating shaft (54) and a material feeding motor (55) for driving the rotating shaft (54) to rotate, and the material discharging end of the material collecting hopper (6) extends into the material collecting vessel (51); the feeding cylinder (52) is fixedly connected to the device box body (1); the feeding cylinder (52) is sleeved on the rotating shaft (54), the spiral blade (53) is fixedly connected to the rotating shaft (54), and the side wall of the spiral blade (53) away from the rotating shaft (54) is attached to the inner wall of the feeding cylinder (52) and can slide relative to the inner wall of the feeding cylinder (52); the feeding barrel (52) is suspended above the collecting vessel (51), a port at the top of the feeding barrel (52) is higher than the feeding hopper (14), a discharging groove (521) is formed in the side wall, close to the top, of the feeding barrel (52), a guide pipe (56) is fixedly communicated with a notch of the discharging groove (521), and the guide pipe (56) is obliquely arranged and the lower end of the guide pipe extends into the feeding hopper (14).