CN220940897U

CN220940897U - Three-roller grinding device

Info

Publication number: CN220940897U
Application number: CN202322420015.0U
Authority: CN
Inventors: 朱振亚; 叶凤麒; 李仙梅
Original assignee: Zhongshan Wing Fai Chemical Co ltd
Current assignee: Zhongshan Wing Fai Chemical Co ltd
Priority date: 2023-09-07
Filing date: 2023-09-07
Publication date: 2024-05-14
Anticipated expiration: 2033-09-07

Abstract

The utility model discloses a three-roller grinding device, which comprises a frame and a grinding cabin arranged in the frame, wherein the grinding cabin comprises a plurality of grinding rollers for grinding materials, a driving mechanism is further arranged on one side of the frame, a detachable dust-proof hood is arranged on the frame, a cleaning system is further arranged in the grinding cabin, the cleaning system is arranged below the grinding rollers, a cleaning cabin and a waste collection cabin are sequentially arranged from top to bottom, the cleaning cabin is communicated with the waste collection cabin, a water tank with a refrigerating module is arranged on one side of the cleaning cabin, a movable cleaner is further arranged on the cleaning cabin, and the cleaner moves along the axial direction of the grinding rollers. The whole device has low operation energy consumption, high cooling efficiency on the grinding roller, obvious cooling effect, automatic cleaning, great reduction of the working strength of workers, labor cost saving, high cleaning efficiency and more clean and environment-friendly performance.

Description

Three-roller grinding device

Technical Field

The utility model relates to the technical field of grinding equipment, in particular to a three-roller grinding device.

Background

The three-roller grinding device is also called a three-roller grinding machine, is called a three-roller machine for short, and can be divided into an experimental three-roller grinding device and a production three-roller grinding device. The three-roller grinding device is suitable for manufacturing sizing agents such as paint, printing ink, pigment, plastics and the like. The three-roller grinding device achieves the grinding effect through the mutual extrusion of the surfaces of the three horizontal rollers and the friction at different speeds. The three-roller grinding device is the most effective grinding and dispersing equipment for high-viscosity materials. The grinding machine is mainly used for grinding liquid slurry and pasty materials such as various paints, printing ink, pigment, plastics, cosmetics, soaps, ceramics, rubber and the like.

The three-roller grinding device has the advantages that the surfaces of the front grinding roller, the middle grinding roller and the rear grinding roller are attached to each other in the Chinese patent application number 201620263338.0, the support plates for fixing the front grinding strip, the middle grinding strip and the rear grinding strip are further arranged on the frame main body, and the driving device for driving the support plates to axially move is further arranged on the frame main body, so that the three-roller grinding device has higher efficiency and more sufficient grinding devices, and the grinding precision of the paint is effectively improved. However, the device has the following disadvantages:

After the grinding operation, the grinding roller needs to be manually cleaned, the manual cleaning has high working strength, residues cannot be efficiently cleaned, and the grinding roller which is not cleaned in place is not clean, so that the next grinding effect is affected; and the device adopts open grinding operation, can produce a large amount of dust in the grinding process, can harm operating personnel's healthy, and environmental protection effect is not good, and this grinder does not possess the cooling effect simultaneously.

Disclosure of utility model

In order to overcome the defects of the prior art, the utility model provides a three-roller grinding device which can effectively solve the problems of the background technology.

The technical scheme adopted for solving the technical problems is as follows:

The three-roller grinding device comprises a frame and a grinding cabin arranged in the frame, wherein the grinding cabin comprises a plurality of grinding rollers for grinding materials, one side of the frame is also provided with a driving mechanism, a detachable dust-proof hood is arranged on the frame, a cleaning system is further arranged in the grinding cabin, the cleaning system is arranged below the grinding rollers, a cleaning cabin and a waste collection cabin are sequentially arranged from top to bottom, the cleaning cabin is communicated with the waste collection cabin, a water tank with a refrigerating module is arranged on one side of the cleaning cabin, a movable cleaner is further arranged on the cleaning cabin, and the cleaner moves along the axial direction of the grinding rollers;

The grinding roller end is provided with a liquid injection hole, the grinding roller end comprises a central shaft, namely a core part, to which torque is applied, a middle part with a concentric cross section taking the core part as a center, and a grinding part arranged on the outer peripheral surface of the middle part, wherein the middle part is of a hollow structure, the hollow structure is filled with liquid for cooling the grinding part, and a heat conducting layer is further arranged between the grinding part and the middle part.

As a preferable technical scheme of the utility model, the dust-proof hood consists of a plurality of movable plates, the middle of each movable plate is connected through a hinge, each movable plate can be contracted or expanded along the X-axis direction of the frame through the hinge, both ends of the dust-proof hood are respectively provided with a mounting seat and a plurality of connecting rods, the mounting seats are fixedly connected with the connecting rods, the connecting rods are vertically arranged with the frame, the positions of the frame corresponding to the connecting rods are provided with mounting screw holes, and the connecting rods are in threaded fit with the mounting screw holes.

As a preferable technical scheme of the utility model, two sides of the frame are also provided with adjusting parts for adjusting the distance between the grinding rollers, each adjusting part comprises an adjusting hand wheel and an adjusting rod connected with the adjusting hand wheel, and the adjusting rods are sequentially connected with the grinding rollers.

As a preferable technical scheme of the utility model, a blanking plate is arranged between the frame and the grinding cabin, the grinding roller is transversely arranged in the grinding cabin, a control screen for controlling a driving mechanism is further arranged on the grinding cabin, and a transmission gear set is arranged at the joint of the driving mechanism and the grinding roller.

As a preferable technical scheme of the utility model, the driving mechanism comprises a motor, a driving wheel piece and a driven wheel piece, wherein the driving wheel piece is connected with the motor, and the driving wheel piece and the driven wheel piece are transmitted through a belt.

As a preferable technical scheme of the utility model, the cleaner comprises a first water pump and a conveying pipe, wherein the first water pump is connected with a water tank, the conveying pipe is connected with the first water pump, a plurality of high-pressure spray heads are further arranged on the conveying pipe, the high-pressure spray heads are distributed along the length direction of the conveying pipe, a second water pump is arranged at one end, far away from the first water pump, of the conveying pipe, and the second water pump is connected with a grinding roller through a guide pipe. And a ball sliding rail is arranged between the storage box and the collecting hopper.

As a preferable technical scheme of the utility model, the waste collection cabin comprises a collection hopper, a storage box and a filter screen arranged at the upper end of the collection hopper, wherein a movable scraper is further arranged on the filter screen, one end of the scraper is connected with a movable device which is fixedly arranged on the side wall of the collection hopper, the collection hopper is connected with the storage box, and the storage box can move along the X-axis direction of the frame through a ball sliding rail;

The outer edge of filter screen passes through bolt and collects the inboard wall fixed connection of fighting, filter screen and scraper blade level set up, and the scraper blade wants to contact with the surface of filter screen, the scraper blade passes through movable device and removes along the X axis direction of filter screen, wherein filter screen and collection fight junction still has offered a notch that is used for the residue exhaust.

As a preferable technical scheme of the utility model, two ends of the cleaner are provided with the guide rail mounting seats, the guide rail mounting seats are fixedly connected with the cleaning cabin, and two ends of the conveying pipe are connected with the guide rail mounting seats and then move along the X-axis direction of the cleaning cabin.

As a preferable technical scheme of the utility model, a conduit connection port for supplementing clear liquid is arranged at the bottom of the water tank, and the water tank is respectively connected with a first water pump and a second water pump.

As a preferable technical scheme of the utility model, the hollow structure of the middle part is provided with a plurality of crescent-shaped cooling liquid conveying grooves, the cooling liquid conveying grooves are filled with liquid for cooling the surface of the grinding roller through a second water pump, a circulating conduit is arranged in the direction of the cooling liquid conveying grooves away from the second water pump, and the circulating conduit is connected with a water tank.

Compared with the prior art, the utility model has the beneficial effects that:

The three-roller grinding device has at least one of the following beneficial effects in the using process:

Through the pumping action of the second water pump, cooling water in the water tank passes through the cooling liquid conveying groove in the grinding roller, so that the grinding roller is cooled. The three grinding rolls are sequentially cooled, cooling water in the grinding rolls is collected into the cooling water tank through the outlet to cool, and the cooling water is cleaned by the cleaner through the action of the first water pump, so that the cleaner moves through the guide rail to clean the surfaces of the grinding rolls in sequence. The three-roller grinding device has the advantages of simple structure, stable and reliable operation, and convenient installation, and can prevent dust from being sucked into a human body by adopting the detachable dust-proof hood. The whole device has low operation energy consumption, high cooling efficiency on the grinding roller, obvious cooling effect, automatic cleaning, great reduction of the working strength of workers, labor cost saving, high cleaning efficiency and more clean and environment-friendly performance.

Drawings

FIG. 1 is a schematic view of a first overall structure of a three-roll grinding device according to the present utility model;

FIG. 2 is a schematic view of a second overall structure of a three-roll grinding apparatus according to the present utility model;

FIG. 3 is a schematic diagram of a three-roll grinding apparatus according to the present utility model;

FIG. 4 is a schematic view of a three-roller grinding apparatus according to a first perspective structure of the present utility model;

FIG. 5 is a schematic view of a second perspective structure of a three-roll grinding device according to the present utility model;

FIG. 6 is a schematic diagram of a cleaning system of a three-roll grinding device according to the present utility model;

Fig. 7 is a schematic view showing the internal structure of a grinding roller of a three-roller grinding device according to the present utility model.

Reference numerals in the drawings:

1. A frame; 101. a dust-proof hood; 102. a movable plate; 103. a mounting base; 104. a connecting rod; 105. installing a screw hole; 106. an adjusting member; 107. an adjusting hand wheel; 108. an adjusting rod; 2. a grinding chamber; 201. a blanking plate; 202. a grinding roller; 203. a drive gear set; 204. a polishing section; 205. an intermediate portion; 206. a cooling liquid conveying groove; 207. a liquid injection hole; 208. a core; 3. a cleaning system; 301. cleaning the cabin; 302. a washer; 303. a water tank; 304. a waste collection bin; 305. a first water pump; 306. a guide rail mounting seat; 307. a delivery tube; 308. a high pressure nozzle; 309. a filter screen; 310. a scraper; 311. a collection bucket; 312. a second water pump; 313. a ball slide rail; 314. a storage tank; 4. a driving mechanism; 401. a driving wheel member; 402. a driven wheel member; 403. and a motor.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-7, the utility model provides a three-roller grinding device, which comprises a frame 1 and a grinding cabin 2 arranged in the frame 1, wherein the grinding cabin 2 comprises a plurality of grinding rollers 202 for grinding materials, the grinding rollers 202 are three in number and are arranged on the grinding cabin 2 in parallel, the frame 1 is used for fixing the grinding cabin 2, one side of the frame 1 is also provided with a driving mechanism 4, the driving mechanism 4 drives the grinding rollers 202 to rotate so as to grind the materials, the frame 1 is provided with a detachable dust-proof hood 101, the dust-proof hood 101 is foldable and is detachably arranged on the frame 1, the dismounting is convenient, the grinding cabin 2 is also internally provided with a cleaning system 3, the cleaning system 3 is arranged below the grinding rollers 202, the three grinding rollers 202 are cleaned in a reciprocating manner by the cleaning system 3, the grinding rollers 202 can clean the surfaces of the grinding rollers 202 only by adopting slow rotation in the cleaning process, the cleaning system 3 can be provided with a cleaning cabin 301 and a waste collecting cabin 304 from top to bottom in sequence, the cleaning cabin 301 and the waste collecting cabin 304 are further provided with a cleaning tank 301 which is communicated with a cleaning tank 302 along the axis of the grinding cabin 302, and the cleaning tank 301 is also provided with a cleaning tank 302 which is communicated with the waste material collecting tank 302;

The cleaner 302 comprises a first water pump 305 and a conveying pipe 307, the first water pump 305 is connected with the water tank 303, the conveying pipe 307 is connected with the first water pump 305, a plurality of high-pressure spray heads 308 are further arranged on the conveying pipe 307, the high-pressure spray heads 308 are distributed along the length direction of the conveying pipe 307, a second water pump 312 is arranged at one end, far away from the first water pump 305, of the conveying pipe 307, and the second water pump 312 is connected with the grinding roller 202 through a guide pipe;

The waste collection cabin 304 comprises a collection hopper 311, a storage box 314 and a filter screen 309 arranged at the upper end of the collection hopper 311, wherein a movable scraper 310 is further arranged on the filter screen 309, one end of the scraper 310 is connected with a movable device, the movable device is fixedly arranged on the side wall of the collection hopper 311, and the collection hopper 311 is connected with the storage box 314;

The movable device comprises a screw rod and a motor connected with the screw rod through a shaft, wherein the scraping plate 310 is connected with the screw rod through a bearing seat, the screw rod is arranged on one side of the filter screen 309 in parallel, the scraping plate 310 moves along the axial direction of the screw rod, and residues on the filter screen can be scraped.

The end of the grinding roller 202 is provided with a liquid injection hole 207, the end of the grinding roller 202 comprises a center shaft, i.e. a core 208, to which torque is applied, a middle part 205 with a concentric cross section with the core 208 as the center, and a grinding part 204 arranged on the outer circumferential surface of the middle part 205, wherein the middle part 205 is in a hollow structure, the hollow structure is filled with liquid for cooling the grinding part 204, a heat conducting layer is further arranged between the grinding part 204 and the middle part 205, the heat conducting layer is a graphene heat conducting film and is attached to the core 208, and the heat conducting layer is tightly attached to the inner wall of the grinding part 204, wherein the hollow structure is a cooling cavity for conveying cooling water to the grinding roller 202.

The first water pump 305 in this embodiment is used on the cleaner 302, the second water pump 312 is used to convey water in the water tank 303 to the cooling cavity in the grinding roller 202, the refrigeration module provided by the water tank 303 is composed of a compressor and a condenser pipe, the condenser pipe is laid at the bottom of the water tank 303, the compressor connected with the condenser pipe is arranged outside the water tank 303, the second water pump 312 firstly sequentially conveys cooling water in the water tank 303 to the grinding roller 202, the three grinding rollers 202 are connected with a conduit, the last conduit of the grinding roller 202 is connected with the water tank 303, the cooled water is stored back to the water tank 303, the first water pump 305 conveys the water in the water tank 303 to the cleaner 302, the conveying pipe 307 on the cleaner 302 is provided with a high-pressure spray nozzle 308, the cleaning efficiency of the grinding roller 202 can be further improved, the waste liquid after cleaning flows into the waste material collection box and is classified, and finally the waste liquid and the residues are treated through the discharge pipe and the storage box 314 respectively.

Further stated, the dust-proof hood 101 is composed of a plurality of movable plates 102, the middle of the movable plates 102 is connected through hinges, the movable plates 102 can shrink or expand along the X-axis direction of the frame 1 through hinges, both ends of the dust-proof hood 101 are respectively provided with a mounting seat 103 and a plurality of connecting rods 104, the mounting seats 103 are fixedly connected with the connecting rods 104, the connecting rods 104 are vertically arranged with the frame 1, the positions of the frame 1 corresponding to the connecting rods 104 are provided with mounting screw holes 105, and the connecting rods 104 are in threaded fit with the mounting screw holes 105 to realize rapid assembly through threaded screwing.

Further, the two sides of the frame 1 are further provided with adjusting members 106 for adjusting the distance between the grinding rollers 202, the adjusting members 106 comprise adjusting handwheels 107 and adjusting rods 108 connected with the adjusting handwheels 107, the adjusting rods 108 are sequentially connected with the grinding rollers 202, compression springs are arranged between the adjusting rods 108 and the grinding rollers 202, and the adjusting handwheels 107 rotate to shrink the springs, so that the distance between the grinding rollers 202 is adjusted.

Further stated, a blanking plate 201 is disposed between the frame 1 and the grinding chamber 2, the grinding roller 202 is transversely disposed in the grinding chamber 2, a control screen for controlling the driving mechanism 4 is further disposed on the grinding chamber 2, a transmission gear set 203 is disposed at a connection portion between the driving mechanism 4 and the grinding roller 202, and the transmission gear set 203 is connected with the grinding roller 202.

Further, the driving mechanism 4 includes a motor 403, a driving wheel member 401 and a driven wheel member 402, where the driving wheel member 401 is connected with the motor 403, and the driving wheel member 401 and the driven wheel member 402 are driven by a belt.

Further, guide rail mounting seats 306 are disposed at two ends of the cleaner 302, the guide rail mounting seats 306 are fixedly connected with the cleaning cabin 301, and two ends of the conveying pipe 307 are connected with the guide rail mounting seats 306 and then move along the X-axis direction of the cleaning cabin 301.

Further, the outer edge of the filter screen 309 is fixedly connected with the inner side wall of the collecting hopper 311 by a bolt, the filter screen 309 and the scraper 310 are horizontally arranged, the scraper 310 is in contact with the surface of the filter screen 309, the scraper 310 moves along the X-axis direction of the filter screen 309 by a moving device, and a notch for discharging residues is further formed at the joint of the filter screen 309 and the collecting hopper 311. The scraper 310 has a length corresponding to that of the filter screen 309 and contacts the filter screen 309, and residues remaining on the filter screen 309 are scraped by the scraper 310 into the storage tank 314.

It is further described that a ball sliding rail 313 is provided between the storage box 314 and the collecting hopper 311, and the storage box 314 is movable along the X-axis direction of the frame 1 by the ball sliding rail 313.

Further, a conduit connection port for supplementing clear liquid is provided at the bottom of the water tank 303, and the water tank 303 is connected to the first water pump 305 and the second water pump 312, respectively.

Further, the hollow structure of the middle portion 205 is formed by a plurality of crescent-shaped cooling liquid conveying grooves 206, the cooling liquid conveying grooves 206 are filled with the liquid for cooling the surface of the grinding roller 202 through the second water pump 312, and a circulation conduit is arranged in the direction of the cooling liquid conveying grooves 206 away from the second water pump 312 and is connected with the water tank 303.

In summary, the cleaning system 3 is disposed below the grinding rolls 202, the three grinding rolls 202 are cleaned in a reciprocating manner by the cleaning system 3, the grinding rolls 202 can clean the surface of the grinding rolls 202 only by adopting slow rotation in the cleaning process, the dead angle of the grinding rolls 202 can be cleaned efficiently, the first water pump 305 is used on the cleaner 302, the second water pump 312 is used for conveying water in the water tank 303 to the cooling cavity in the grinding rolls 202, the refrigerating module disposed in the water tank 303 is composed of a compressor and a condenser tube, the condenser tube is laid at the bottom of the water tank 303, the compressor connected with the condenser tube is disposed outside the water tank 303, wherein the second water pump 312 sequentially conveys cooling water in the water tank 303 in the grinding rolls 202, the three grinding rolls 202 are connected with a conduit, the conduit of the last grinding roll 202 is connected with the water tank 303, the cooled water is stored back into the water tank 303, the first water pump 305 conveys the water in the water tank 302, the conveying tube 307 on the cleaner 302 is provided with a high-pressure nozzle 308, the cleaning efficiency of the grinding rolls 202 can be further improved, the waste water can be cleaned by the waste water can be sequentially discharged from the waste water tank 303, and the waste water can be sequentially cleaned by the waste water tank 302, and the waste water can be sequentially discharged from the waste water tank is processed by the waste water tank through the waste water tank and the waste water tank. The three-roller grinding device has the advantages of simple structure, stable and reliable operation, and convenient installation, and can prevent dust from being sucked into a human body by adopting the detachable dust-proof cover 101. The whole device has low operation energy consumption, high cooling efficiency on the grinding roller 202 and obvious cooling effect, and can automatically clean the grinding roller, greatly reduce the working strength of workers, save labor cost, and have high cleaning efficiency, thereby being cleaner and environment-friendly.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The three-roller grinding device comprises a frame (1) and a grinding cabin (2) arranged in the frame (1), wherein the grinding cabin (2) comprises a plurality of grinding rollers (202) for grinding materials, one side of the frame (1) is further provided with a driving mechanism (4), and the three-roller grinding device is characterized in that a detachable dust-proof hood (101) is arranged on the frame (1), a cleaning system (3) is further arranged in the grinding cabin (2), the cleaning system (3) is arranged below the grinding rollers (202), a cleaning cabin (301) and a waste collection cabin (304) are sequentially arranged on the cleaning system (3) from top to bottom, the cleaning cabin (301) is communicated with the waste collection cabin (304), one side of the cleaning cabin (301) is provided with a water tank (303) with a refrigerating module, the cleaning cabin (301) is further provided with a movable cleaner (302), and the cleaner (302) moves along the axis direction of the grinding rollers (202);

The end of the grinding roller (202) is provided with a liquid injection hole (207), the grinding roller (202) comprises a center shaft (208) with torque applied, a middle part (205) with a cross section of a concentric circle taking the core (208) as the center, and a grinding part (204) arranged on the outer peripheral surface of the middle part (205), wherein the middle part (205) is of a hollow structure, the hollow structure is filled with liquid for cooling the grinding part (204), and a heat conducting layer is further arranged between the grinding part (204) and the middle part (205).

2. A three-roll grinding apparatus according to claim 1, wherein: the dustproof hood (101) comprises a plurality of movable plates (102), through hinged joint in the middle of movable plates (102), movable plates (102) can be along the X axis direction shrink or expansion of frame (1) through the hinge, both ends of dustproof hood (101) all are equipped with mount pad (103) and a plurality of connecting rods (104), mount pad (103) and connecting rod (104) fixed connection, connecting rod (104) set up perpendicularly with frame (1), frame (1) corresponds the position of connecting rod (104) and is equipped with installation screw (105), connecting rod (104) and installation screw (105) screw-thread fit.

3. A three-roll grinding apparatus according to claim 1, wherein: the grinding machine is characterized in that adjusting parts (106) used for adjusting the distance between the grinding rollers (202) are further arranged on two sides of the frame (1), each adjusting part (106) comprises an adjusting hand wheel (107) and an adjusting rod (108) connected with the adjusting hand wheel (107), and the adjusting rods (108) are sequentially connected with the grinding rollers (202).

4. A three-roll grinding apparatus according to claim 1, wherein: a blanking plate (201) is arranged between the frame (1) and the grinding cabin (2), the grinding roller (202) is transversely arranged in the grinding cabin (2), a control screen for controlling the driving mechanism (4) is further arranged on the grinding cabin (2), and a transmission gear set (203) is arranged at the joint of the driving mechanism (4) and the grinding roller (202).

5. A three-roll grinding apparatus according to claim 1 or 4, characterized in that: the driving mechanism (4) comprises a motor (403), a driving wheel piece (401) and a driven wheel piece (402), wherein the driving wheel piece (401) is connected with the motor (403), and the driving wheel piece (401) and the driven wheel piece (402) are in transmission through a belt.

6. A three-roll grinding apparatus according to claim 1, wherein: the cleaner (302) comprises a first water pump (305) and a conveying pipe (307), the first water pump (305) is connected with a water tank (303), the conveying pipe (307) is connected with the first water pump (305), a plurality of high-pressure spray heads (308) are further arranged on the conveying pipe (307), the high-pressure spray heads (308) are distributed along the length direction of the conveying pipe (307), one end, far away from the first water pump (305), of the conveying pipe (307) is provided with a second water pump (312), and the second water pump (312) is connected with the grinding roller (202) through a guide pipe.

7. A three-roll grinding apparatus according to claim 1, wherein: the waste collection cabin (304) comprises a collection hopper (311), a storage box (314) and a filter screen (309) arranged at the upper end of the collection hopper (311), a movable scraping plate (310) is further arranged on the filter screen (309), one end of the scraping plate (310) is connected with a movable device, the movable device is fixedly arranged on the side wall of the collection hopper (311), the collection hopper (311) is connected with the storage box (314), a ball sliding rail (313) is arranged between the storage box (314) and the collection hopper (311), and the storage box (314) can move along the X-axis direction of the rack (1) through the ball sliding rail (313);

The outer edge of the filter screen (309) is fixedly connected with the inner side wall of the collecting hopper (311) through bolts, the filter screen (309) is horizontally arranged with the scraping plate (310), the scraping plate (310) is in contact with the surface of the filter screen (309), the scraping plate (310) moves along the X-axis direction of the filter screen (309) through a movable device, and a notch for discharging residues is further formed in the joint of the filter screen (309) and the collecting hopper (311).

8. The three-roll grinding apparatus of claim 6, wherein: guide rail mounting seats (306) are arranged at two ends of the cleaner (302), the guide rail mounting seats (306) are fixedly connected with the cleaning cabin (301), and two ends of the conveying pipe (307) are connected with the guide rail mounting seats (306) and then move along the X-axis direction of the cleaning cabin (301).

9. A three-roll grinding apparatus according to claim 1, wherein: the bottom of the water tank (303) is provided with a conduit connection port for supplementing clear liquid, and the water tank (303) is respectively connected with a first water pump (305) and a second water pump (312).

10. A three-roll grinding apparatus according to claim 1, wherein: the hollow structure of the middle part (205) is provided with a plurality of crescent-shaped cooling liquid conveying grooves (206), the cooling liquid conveying grooves (206) are filled with liquid for cooling the surface of the grinding roller (202) through a second water pump (312), a circulating conduit is arranged in the direction, away from the second water pump (312), of the cooling liquid conveying grooves (206), and the circulating conduit is connected with the water tank (303).