CN215547356U

CN215547356U - High-efficiency crystal flat grinding machine

Info

Publication number: CN215547356U
Application number: CN202121205820.6U
Authority: CN
Inventors: 张时训
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2022-01-18
Anticipated expiration: 2031-06-01

Abstract

The utility model discloses a high-efficiency crystal flat grinding machine which comprises a rack (1), wherein grinding discs (2) which are distributed up and down and a placing disc (3) for bonding and grinding articles are arranged on the rack (1); the grinding disc (2) and the placing disc (3) are both arranged horizontally, and the vertical distance between the grinding disc (2) and the placing disc (3) can be adjusted. The utility model not only can reduce the labor intensity, but also has the advantages of higher safety, higher working efficiency, more uniform polishing precision, more convenient sewage collection and treatment, better moistening and polishing effects, wider application range, better structural stability and more convenient maintenance.

Description

High-efficiency crystal flat grinding machine

Technical Field

The utility model relates to crystal polishing equipment, in particular to a high-efficiency crystal flat grinding machine.

Background

The artificial crystal glass product has beautiful appearance and good optical performance, and has good application in ornaments.

The existing crystal processing process generally adopts a flat grinding machine, the existing flat grinding machine is provided with an upward grinding disc on a frame, and a worker holds a crystal by hand and then grinds the crystal close to the grinding disc or clamps the crystal by a clamping frame and then grinds the crystal close to the grinding disc; the crystal is polished by hands, so that the potential safety hazard is high, and the crystal needs to be held by workers for a long time, so that the labor intensity is high; in addition, only a single crystal or a small number of crystals can be polished at a time in a crystal fixing mode of clamping the crystal by the handheld crystal and the clamping frame, so that the overall processing efficiency is low. Therefore, the existing crystal flat grinding machine has the problems of lower safety, higher labor intensity and lower working efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-efficiency crystal flat grinding machine. The utility model not only can reduce the labor intensity, but also has the advantages of higher safety and higher working efficiency.

The technical scheme of the utility model is as follows: a high-efficiency crystal flat grinding machine comprises a frame, wherein grinding discs distributed up and down and a placing disc for bonding ground articles are arranged on the frame; the mill and place the dish and all be horizontal setting, the mill with place the vertical distance between the dish and adjust.

In the high-efficiency crystal flat grinding machine, the grinding disc is eccentrically arranged relative to the placing disc; the placing disc can rotate, and after the placing disc rotates, the grinding disc can pass through the whole upper surface of the placing disc.

In the high-efficiency crystal flat grinding machine, a vertical spline rod is fixed on the bottom surface of the center of the placing disc, a spline sleeve is arranged outside the spline rod in a matching way, and a driving part is connected between the spline sleeve and the frame; the bottom of the spline rod is provided with a push block, and the spline rod is rotationally clamped in the push block; the push block is provided with a vertical telescopic part.

In the high-efficiency crystal flat grinding machine, the vertical telescopic part comprises a fixed plate positioned below the push block, and a plurality of vertical stand columns are connected between the fixed plate and the frame; a sliding plate is arranged between the fixed plate and the pushing block, and the sliding plate and the upright post are arranged in a sliding manner; a plurality of connecting rods are connected between the sliding plate and the pushing block, and each connecting rod is provided with a pressure sensor; a servo motor is fixed on the fixed plate, an output shaft of the servo motor is connected with a vertical screw rod, and the screw rod is in threaded connection with the sliding plate.

In the high-efficiency crystal flat grinding machine, the placing disc comprises a fixed disc and a material sticking disc which are detachably mounted.

In the high-efficiency crystal flat grinding machine, a sewage collecting tank is arranged on the machine frame at a position corresponding to the lower part of the placing disc, a working frame is arranged above the sewage collecting tank, and the grinding disc and the placing disc are surrounded by the sewage collecting tank and the working frame; a placing opening is formed in one side face of the working frame, and a flexible transparent film capable of being opened and closed is arranged at the placing opening.

In the aforesaid quartzy flat grinding machine of high efficiency, sewage collecting tank's bottom plate is the slope setting, corresponds sewage collecting tank bottom one side in the frame and is fixed with sewage receiving tank, is connected with the drain pipe on sewage receiving tank's the bottom surface.

In the high-efficiency crystal flat grinding machine, slide rails are fixed on two sides of the top end of the sewage collecting tank, and slide blocks fixed on the working frame are arranged on the slide rails in a sliding manner; each sliding block is fixedly provided with a protective cover, and the protective cover is sleeved outside the sliding block and the sliding rail; a worm and gear motor is fixed on the rack, a rotary table is connected to the worm and gear motor, and a swing rod fixed with the working frame is eccentrically connected to the rotary table.

In the high-efficiency crystal flat grinding machine, a vertically arranged connecting sleeve is fixed at the top end of the working frame, a rotating shaft is rotatably connected in the connecting sleeve, and a water injection channel is arranged in the rotating shaft; the top of pivot is connected with drive division, the mill is fixed in the bottom of pivot, and the position department that corresponds the water injection passageway on the mill is equipped with the delivery port.

In the high-efficiency crystal flat grinding machine, the grinding disc comprises a connecting block fixed at the bottom of the rotating shaft, a grinding disc is arranged on the bottom surface of the connecting block, and a plurality of connecting screws are arranged between the grinding disc and the connecting block; the water outlet is arranged at the position, corresponding to the water injection channel, on the polishing disc and the connecting block; the feeding direction of the connecting screw is from top to bottom, the top end of the connecting screw protrudes above the connecting block, and the bottom end of the connecting screw is positioned in the polishing sheet; the driving part comprises a driven wheel fixed at the top of the rotating shaft, a driving wheel is arranged on one side of the driven wheel, and a transmission belt is connected between the driving wheel and the driven wheel; the driving wheel is connected with a motor fixed on the working frame; the top of pivot is connected with the rotary joint, is connected with the water injection pipe on the rotary joint.

Compared with the prior art, the grinding disc and the placing disc are vertically distributed, and the crystal (or other objects which can be used for flat grinding) can be fixedly placed on the placing disc by coating glue on the surface of the placing disc, so that a large amount of crystal can be placed on the placing disc and is convenient to fix, a worker does not need to hold the crystal to be close to the rotating grinding disc, and the safety is high; the worker holds the crystal for a long time or frequently takes and places the crystal, so that the labor intensity is reduced; through adjusting the vertical distance between placing the dish and the mill, make a plurality of quartzy on placing the dish can carry out the flat grinding operation simultaneously, work efficiency is higher, and the degree of depth of polishing can pass through regulation control. In addition, the area of the placing disc is larger than that of the grinding disc, the grinding disc is eccentrically arranged on one side of the placing disc, and after the placing disc rotates, the grinding disc can sequentially grind crystals on the placing disc, so that the total amount of the crystals which can be ground after one-time feeding is improved, and the processing efficiency is improved; the vertical telescopic part pushes the push block to enable the spline rod to drive the placing disc to lift, so that the crystal on the placing disc can be close to the grinding disc; the driving part drives the driving belt wheel to rotate through a driving motor on the rack and drives a driven wheel fixed outside the spline housing to rotate through a belt, so that the spline housing can drive the spline rod to rotate, and the spline rod can vertically move and rotate; the servo motor drives the screw rod to rotate, so that the sliding plate moves relative to the screw rod, and the sliding plate is guided by the plurality of upright posts, so that the sliding plate has good movement stability; after the sliding plate moves, the pushing block can be pushed through the connecting rod, so that the spline rod drives the placing disc to lift; the pressure sensor on the connecting rod can better transmit a pressure signal between the crystals on the placing disc and the grinding disc, and the controller can control the servo motor to regulate and control the grinding pressure of the crystals according to the pressure signal, so that the grinding precision of a large number of crystals on the placing disc can be better unified; in addition, the material sticking disc is installed with the fixed disc after crystal material sticking operation is finished (the fixed disc and the material sticking disc can be connected by connecting a plurality of screws from bottom to top), and when the material sticking disc stuck with crystals is used for polishing operation, a worker can synchronously perform crystal material sticking operation on the other material sticking disc; after the crystals on the material sticking disc are polished, the material sticking disc can be directly replaced to realize the feeding and discharging operation of a large amount of crystals, so that the downtime is greatly reduced, and the working efficiency is improved; the placing disc and the grinding disc are surrounded by the sewage collecting tank and the working frame, so that polishing sewage can be better concentrated in the sewage collecting tank; the flexible transparent film (which can be in a side-pull organ cover type, or the bottom end of the flexible transparent film is fixed on the frame, and the top end of the flexible transparent film is connected with a clamping rod clamped with the top end of the working frame) which can be opened and closed at one side of the working frame can conveniently place a sticky material tray in the tray for taking and placing and block sewage during polishing; the inclined bottom plate of the sewage well in the sewage collecting tank is guided to the sewage receiving tank and can be discharged from a drain pipe on the bottom surface of the sewage receiving tank, so that the sewage treatment is more convenient; after a worm and gear motor on the rack drives the rotary table to rotate, the swing rod on the rotary table can drive the working frame to move, and the slide block on the working frame can swing along the slide rail on the sewage collecting tank, so that the grinding disc can swing back and forth during rotation to improve the grinding efficiency; the rotating shaft and the connecting sleeve are both vertically fixed on the working frame, and a vertical water injection channel is arranged in the rotating shaft; after the driving part drives the top of the rotating shaft to rotate, the grinding disc fixed at the bottom of the rotating shaft can also synchronously rotate, and after the clean water is injected from the water injection channel, the clean water can be discharged from a water outlet in the middle of the grinding disc; the discharged clean water flows outwards after contacting the placing disc, and a part of the clean water is thrown outwards after contacting the grinding disc rotating at a high speed; the whole grinding disc can be wetted by the clear water in the process of flowing outwards or throwing out from the center of the grinding disc, and the grinding position between the crystal and the grinding disc can be wetted necessarily, so that the grinding effect of the crystal is improved; the grinding disc is fixed at the bottom, so that the grinding pressure between the grinding disc and the crystal can be better transmitted to the pressure sensor, and the grinding precision of the crystal is ensured; the grinding disc consists of a connecting block and a grinding sheet, and the grinding sheet is fixed on the connecting block through a plurality of connecting screws, so that the grinding sheet is convenient to replace and maintain; the top end of the connecting screw protrudes above the connecting block, so that the connecting screw can be conveniently screwed off, and the bottom end of the connecting screw is positioned in the polishing sheet, so that the whole polishing plane on the bottom surface of the polishing sheet is complete, and the polishing effect is good; the driving part drives the driving wheel to rotate by the motor and drives the driven wheel fixed at the top of the rotating shaft to rotate by the transmission belt, so that the rotating shaft is driven to rotate, and the whole structure is simple; the pivot top is connected with the water injection pipe through rotary joint, and the water injection pipe can pour into the water injection passageway with the clear water to when making the pivot rotate, the water injection pipe can not cause the knot along with moving. Therefore, the utility model not only can reduce the labor intensity, but also has the advantages of higher safety, higher working efficiency, more uniform polishing precision, more convenient sewage collection and treatment, better moistening and polishing effects, wider application range, better structural stability and more convenient maintenance.

Drawings

Fig. 1 is a schematic structural view of the present invention.

The labels in the figures are: 1-a frame, 2-a grinding disc, 3-a placing disc, 4-a fixed disc, 5-a bonding disc, 7-a spline rod, 8-a spline sleeve, 9-a pushing block, 10-a fixed plate, 11-a vertical column, 12-a sliding plate, 13-a connecting rod, 14-a pressure sensor, 15-a servo motor, 16-a screw rod, 17-a sewage collecting tank, 18-a working frame, 19-a flexible transparent film, 20-a sewage receiving tank, 21-a drain pipe, 22-a sliding rail, 23-a sliding block, 24-a protective cover, 25-a worm gear motor, 26-a rotating disc, 27-a swinging rod, 28-a connecting sleeve, 29-a rotating shaft, 30-a water injection channel, 31-a water outlet, 36-a connecting block and 37-a polishing disc, 38-connecting screw, 39-driven wheel, 40-driving wheel, 41-driving belt, 42-motor, 43-rotary joint and 44-water injection pipe.

Detailed Description

The utility model is further illustrated by the following figures and examples, which are not to be construed as limiting the utility model.

Examples are given. A high-efficiency crystal flat grinding machine is shown in figure 1 and comprises a frame 1, wherein grinding discs 2 which are distributed up and down and a placing disc 3 for bonding ground objects are arranged on the frame 1; the grinding disc 2 and the placing disc 3 are both horizontally arranged, and the vertical distance between the grinding disc 2 and the placing disc 3 can be adjusted.

The grinding disc 2 is eccentrically arranged relative to the placing disc 3; the placing disc 3 can rotate, and the grinding disc 2 can pass through the whole upper surface of the placing disc 3 after the placing disc 3 rotates; a vertical spline rod 7 is fixed on the bottom surface of the center of the placing disc 3, a spline sleeve 8 is arranged outside the spline rod 7 in a matched mode, and a driving part is connected between the spline sleeve 8 and the rack 1; the bottom of the spline rod 7 is provided with a push block 9, and the spline rod 7 is rotationally clamped in the push block 9; a vertical telescopic part is arranged on the push block 9; the vertical telescopic part comprises a fixed plate 10 positioned below the push block 9, and a plurality of vertical upright posts 11 are connected between the fixed plate 10 and the rack 1; a sliding plate 12 is arranged between the fixed plate 10 and the pushing block 9, and the sliding plate 12 and the upright post 11 are arranged in a sliding manner; a plurality of connecting rods 13 are connected between the sliding plate 12 and the pushing block 9, and each connecting rod 13 is provided with a pressure sensor 14; a servo motor 15 is fixed on the fixed plate 10, an output shaft of the servo motor 15 is connected with a vertical screw rod 16, and the screw rod 16 is in threaded connection with the sliding plate 12; the placing disc 3 comprises a fixed disc 4 and a material sticking disc 5 which are detachably arranged; a sewage collecting tank 17 is arranged on the rack 1 corresponding to the position below the placing disc 3, a working frame 18 is arranged above the sewage collecting tank 17, and the grinding disc 2 and the placing disc 3 are surrounded by the sewage collecting tank 17 and the working frame 18; a placing opening is formed in one side face of the working frame 18, and a flexible transparent film 19 capable of being opened and closed is arranged at the placing opening; the bottom plate of the sewage collecting tank 17 is obliquely arranged, a sewage receiving tank 29 is fixed on one side of the rack 1 corresponding to the bottom end of the sewage collecting tank 17, and a drain pipe 21 is connected to the bottom surface of the sewage receiving tank 20; slide rails 22 are fixed on two sides of the top end of the sewage collecting tank 17, and slide blocks 23 fixed on the working frame 18 are arranged on the slide rails 22 in a sliding manner; each sliding block 23 is fixed with a protective cover 24, and the protective cover 24 is sleeved outside the sliding block 23 and the sliding rail 22; a worm gear motor 25 is fixed on the frame 1, a rotary table 26 is connected on the worm gear motor 25, and a swing rod 27 fixed with the working frame 18 is eccentrically connected on the rotary table 26; a vertically arranged connecting sleeve 28 is fixed at the top end of the working frame 18, a rotating shaft 29 is rotatably connected in the connecting sleeve 28, and a water injection channel 30 is arranged in the rotating shaft 29; the top of the rotating shaft 29 is connected with a driving part, the grinding disc 2 is fixed at the bottom of the rotating shaft 29, and a water outlet 31 is arranged at the position, corresponding to the water injection channel 30, on the grinding disc 2; the grinding disc 2 comprises a connecting block 36 fixed at the bottom of the rotating shaft 29, a grinding disc 37 is arranged on the bottom surface of the connecting block 36, and a plurality of connecting screws 38 are arranged between the grinding disc 37 and the connecting block 36; the water outlet 31 is arranged on the polishing piece 37 and the connecting block 36 at the position corresponding to the water injection channel 30; the feeding direction of the connecting screw 38 is from top to bottom, the top end of the connecting screw 38 protrudes above the connecting block 36, and the bottom end of the connecting screw 38 is positioned in the polishing disc 37; the driving part comprises a driven wheel 39 fixed on the top of the rotating shaft 29, one side of the driven wheel 39 is provided with a driving wheel 40, and a transmission belt 41 is connected between the driving wheel 40 and the driven wheel 39; the driving wheel 40 is connected with a motor 42 fixed on the working frame 18; the top end of the rotating shaft 29 is connected with a rotating joint 43, and the rotating joint 43 is connected with a water injection pipe 44.

The working principle is as follows: the worker coats the viscose on the viscose tray 5, horizontally distributes and glues a plurality of crystals on the viscose tray 5, then installs the viscose tray 5 on the fixed tray 4 to form the placing tray 2, and then closes the flexible transparent film 19 on one side of the working frame 18; then, the water injection pipe 44 is opened, the water injection pipe 44 can introduce clean water into the water injection channel 30 in the rotating shaft 29 through the rotating joint 43, and the clean water flows out from the water injection channel 30 downwards from the water outlet 31 on the grinding disc 2;

starting a motor 42 on the working frame 18, wherein the motor 42 drives a driving wheel 40 to rotate, the driving wheel 40 drives a driven wheel 39 to rotate through a transmission belt 41, and a rotating shaft 29 fixed on the driven wheel 39 rotates relative to a connecting sleeve 28; because the water injection pipe 44 is connected with the top end of the rotating shaft 29 through the rotating joint 43, the rotating shaft 29 cannot drive the water injection pipe 44 to rotate when rotating, and the water injection pipe 44 is prevented from being wound and knotted; after the rotating shaft 29 rotates, the fixed block 32 fixed at the bottom end of the rotating shaft 29 can be driven to rotate, and the grinding disc 2 can also rotate synchronously as the fixed block 32 is fixed with the grinding disc 2 through a plurality of fixing screws 33 distributed in an annular shape.

Then, starting the servo motor 15 on the fixed plate 10, and driving the screw rod 16 to rotate by the servo motor 15, so that the sliding plate 12 relatively moves along the plurality of upright posts 11 relative to the screw rod 16; after the sliding plate 12 moves, the pushing block 9 can be pushed through the connecting rod 13, so that the spline rod 7 drives the placing disc 3 to ascend until the crystal on the placing disc 3 is in contact with the grinding disc 2 for grinding; the pressure sensor 14 on the connecting rod 13 can well transmit a pressure signal between the crystals on the placing disc 3 and the grinding disc 2, and the controller can control the servo motor 15 to regulate and control the grinding pressure of the crystals according to the pressure signal, so that the grinding precision of a large amount of crystals on the placing disc 3 can be better unified; a worm gear motor 25 on the rack 1 drives a slide block 23 on the working frame 18 to swing along a slide rail 22 on the sewage collecting tank 17 through a turntable 26 and a swing rod 27, so that the grinding disc 2 can swing when rotating, and the crystal grinding efficiency is improved; a protective cover 24 is fixed on the sliding block 23, so that the positions of the sliding block 23 and the sliding rail 22 are not easily influenced by polishing sewage, and the swing stability is ensured.

Subsequently, the driving part outside the spline housing 8 can drive the spline housing 8 to drive the spline rod 7 to rotate, so that the placing disc 3 can rotate, and the grinding disc 2 can polish all crystals on the placing disc 3.

During polishing, clear water is discharged from the water outlet 31 and then flushed on the placing disc 3, a part of clear water flows outwards, and a part of clear water splashes back to the bottom surface of the grinding disc 2 and is thrown outwards by the grinding disc 2 rotating at a high speed, so that the polishing position between the crystal and the grinding disc 2 is wetted, and the polishing effect is ensured; the waste water produced by polishing is blocked by the sewage collecting tank 17 and the working frame 18, so that the sewage can be collected by the sewage collecting tank 17 and flows into the sewage receiving tank 20 along the inclined bottom plate of the sewage collecting tank 17, the sewage in the sewage receiving tank 20 is discharged outwards from the drain pipe 21, and the sewage is collected and treated conveniently.

When the grinding disc 2 is worn and needs to be maintained and replaced, only the connecting screws 38 on the connecting block 36 need to be screwed out upwards, and the connecting screws 38 are screwed up again after a new grinding piece 37 is replaced, so that the grinding disc 2 is convenient to maintain and operate.

Claims

1. A high-efficiency crystal flat grinding machine is characterized in that: comprises a frame (1), wherein the frame (1) is provided with grinding discs (2) which are distributed up and down and a placing disc (3) for bonding ground objects; the grinding disc (2) and the placing disc (3) are both horizontally arranged, and the vertical distance between the grinding disc (2) and the placing disc (3) can be adjusted; the placing disc (3) comprises a fixed disc (4) and a material sticking disc (5) which are detachably mounted.

2. A high efficiency crystal flat grinder as claimed in claim 1, wherein: the grinding disc (2) is eccentrically arranged relative to the placing disc (3); the placing disc (3) can rotate, and after the placing disc (3) rotates, the grinding disc (2) can pass through the whole upper surface of the placing disc (3).

3. A high efficiency crystal flat grinder as claimed in claim 1, wherein: a vertical spline rod (7) is fixed on the bottom surface of the center of the placing disc (3), a spline sleeve (8) is arranged outside the spline rod (7) in a matched mode, and a driving part is connected between the spline sleeve (8) and the rack (1); the bottom of the spline rod (7) is provided with a push block (9), and the spline rod (7) is rotationally clamped in the push block (9); the push block (9) is provided with a vertical telescopic part.

4. A high efficiency crystal flat grinder as claimed in claim 3, wherein: the vertical telescopic part comprises a fixed plate (10) positioned below the push block (9), and a plurality of vertical upright posts (11) are connected between the fixed plate (10) and the rack (1); a sliding plate (12) is arranged between the fixed plate (10) and the push block (9), and the sliding plate (12) and the upright post (11) are arranged in a sliding manner; a plurality of connecting rods (13) are connected between the sliding plate (12) and the push block (9), and each connecting rod (13) is provided with a pressure sensor (14); a servo motor (15) is fixed on the fixed plate (10), a vertical screw rod (16) is connected to an output shaft of the servo motor (15), and the screw rod (16) is in threaded connection with the sliding plate (12).

5. A high efficiency crystal flat grinder as claimed in claim 1, wherein: a sewage collecting tank (17) is arranged on the rack (1) corresponding to the position below the placing disc (3), a working frame (18) is arranged above the sewage collecting tank (17), and the grinding disc (2) and the placing disc (3) are surrounded by the sewage collecting tank (17) and the working frame (18); a placing opening is formed in one side face of the working frame (18), and a flexible transparent film (19) capable of being opened and closed is arranged at the placing opening.

6. A high efficiency crystal flat grinder as claimed in claim 5, wherein: the bottom plate of sewage collecting groove (17) is the slope setting, corresponds sewage collecting groove (17) bottom one side on frame (1) and is fixed with sewage receiving tank (20), is connected with drain pipe (21) on the bottom surface of sewage receiving tank (20).

7. A high efficiency crystal flat grinder as claimed in claim 5, wherein: slide rails (22) are fixed on two sides of the top end of the sewage collecting tank (17), and slide blocks (23) fixed on the working frame (18) are arranged on the slide rails (22) in a sliding manner; each sliding block (23) is fixedly provided with a protective cover (24), and the protective cover (24) is sleeved outside the sliding block (23) and the sliding rail (22); a worm and gear motor (25) is fixed on the rack (1), a rotary table (26) is connected to the worm and gear motor (25), and a swing rod (27) fixed with the working frame (18) is eccentrically connected to the rotary table (26).

8. A high efficiency crystal flat grinder as claimed in claim 5, wherein: a vertically arranged connecting sleeve (28) is fixed at the top end of the working frame (18), a rotating shaft (29) is rotatably connected in the connecting sleeve (28), and a water injection channel (30) is arranged in the rotating shaft (29); the top of pivot (29) is connected with the drive division, mill (2) are fixed in the bottom of pivot (29), and the position department that corresponds water injection passageway (30) on mill (2) is equipped with delivery port (31).

9. A high efficiency crystal flat grinder as claimed in claim 8, wherein: the grinding disc (2) comprises a connecting block (36) fixed at the bottom of the rotating shaft (29), a grinding disc (37) is arranged on the bottom surface of the connecting block (36), and a plurality of connecting screws (38) are arranged between the grinding disc (37) and the connecting block (36); the water outlet (31) is arranged at the position, corresponding to the water injection channel (30), of the polishing sheet (37) and the connecting block (36); the feeding direction of the connecting screw (38) is from top to bottom, the top end of the connecting screw (38) protrudes above the connecting block (36), and the bottom end of the connecting screw (38) is positioned in the polishing disc (37); the driving part comprises a driven wheel (39) fixed at the top of the rotating shaft (29), one side of the driven wheel (39) is provided with a driving wheel (40), and a transmission belt (41) is connected between the driving wheel (40) and the driven wheel (39); the driving wheel (40) is connected with a motor (42) fixed on the working frame (18); the top end of the rotating shaft (29) is connected with a rotating joint (43), and a water injection pipe (44) is connected to the rotating joint (43).