CN111567159A

CN111567159A - High-precision scraper

Info

Publication number: CN111567159A
Application number: CN202010543979.2A
Authority: CN
Inventors: 刘艳鹏; 赵允锋; 白金浩; 赵珂
Original assignee: Hebei Chaoping Farm Machinery Manufacturing Co ltd
Current assignee: Hebei Chaoping Farm Machinery Manufacturing Co ltd
Priority date: 2020-06-15
Filing date: 2020-06-15
Publication date: 2020-08-25
Anticipated expiration: 2040-06-15
Also published as: CN111567159B

Abstract

The invention belongs to the technical field of agricultural machinery, and provides a high-precision scraper which comprises a traction mechanism, a hopper connected with the traction mechanism, a shovel plate arranged on the hopper, a soil transporting device and a traveling mechanism which are matched with the hopper, and a satellite signal receiving device arranged on the hopper, wherein the soil transporting device comprises a conveying crawler belt, a screening device arranged at one end of the conveying crawler belt, a soil distributing wheel positioned below the screening device, and a baffle plate forming an accommodating space with the soil distributing wheel is also arranged in the hopper. Through the technical scheme, the problem that the land leveling precision of the scraper is low in the land leveling process in the prior art is solved.

Description

High-precision scraper

Technical Field

The invention belongs to the technical field of agricultural machinery, and relates to a high-precision scraper.

Background

From ancient times to present, agriculture is the basic industry of China, because the territory area is vast, China is also a vast agricultural country in the world, and agricultural production is related to the root of people's life. In the prior art, traditional artifical level land mode has been abandoned in the time on efficiency, and the level land consumes the time overlength, can lead to missing the best seeding time-saving, influence the whole growth process of crops, though there is some level land scraper in the modern machine, level land scraper adopts laser positioning more, receive unusual weather's such as big fog, strong wind influence great, it is difficult to accomplish accurate level land effect, and only lie in bellied scraper to level land scraper, the low-lying department is difficult to reach high-efficient fill level, based on above problem, need a high-efficient accurate scraper equipment urgently.

Disclosure of Invention

The invention provides a high-precision scraper, which solves the problem that the scraper in the prior art is low in flat land precision in a flat land leveling process.

The technical scheme of the invention is realized as follows:

the utility model provides a high accuracy scraper, include drive mechanism, with hopper, setting that drive mechanism connects are in shovel board on the hopper, with hopper complex fortune native device and advancing mechanism and setting are in satellite signal receiving arrangement on the hopper, fortune native device includes the conveying track, sets up the screening plant of conveying track one end, is located divide native wheel under the screening plant, still be provided with in the hopper with divide native wheel component accommodation space's baffle.

The front end of the feeding end of the hopper bottom plate is convex, the conveying crawler belt is provided with a soil shifting plate, and the soil shifting plate conveys soil after the convex part on the hopper.

Still including supporting the backing roll of conveying track, the backing roll is including setting up driven voller, the setting of hopper entrance point bottom are in the drive roller and the setting of branch soil wheel top are in the driven voller with tensioning roller between the drive roller, tensioning roller sets up with the help of the mobile bearing frame on the hopper, conveying track slope sets up.

Screening plant including the screening board that has the round hole, with the slider that the screening board is connected, the screening board sets up the below of conveying track discharge end, the slider slides and sets up on the hopper, vibration drive device with the slider is connected, drives the slider vibrates along the direction that the perpendicular to gos forward.

The screening plate is characterized by further comprising a sundry box, wherein one side, close to the screening plate, of the sundry box is provided with a long hole, the screening plate is arranged in an inclined mode, one end of the advancing direction is a high point, and the screening plate penetrates through the long hole.

The miscellaneous workbin is close to one side of screening board is the structural slab, the structural slab is protruding to the direction that advances, the structural slab with the baffle constitutes accommodation space, the baffle is including the soil storage plate and leak native board, the soil storage plate with the first soil storage space that constitutes of structural slab, leak native board with structural slab hypoplastron part constitutes leaks the soil space, divide the native wheel rotation to set up in leaking the soil space.

The soil distributing wheel is provided with soil shifting teeth opposite to the rotating direction, and a soil distributing space is formed between every two adjacent soil shifting teeth.

Still include with the telescoping device that miscellaneous workbin is connected, miscellaneous workbin slides in the hopper, miscellaneous workbin bottom is the opening, be provided with the baffle in the miscellaneous workbin, the baffle will miscellaneous workbin divide into the second and deposits soil space and miscellaneous material space, the screening board extends to miscellaneous material space top the second is deposited and is provided with the unloading commentaries on classics board that has the passageway of unloading under the soil space, the hopper bottom plate blocks miscellaneous material space the opening.

The advancing mechanism comprises an advancing support, an advancing wheel and a supporting oil cylinder hinged with the advancing support and the hopper, the advancing wheel is hinged with the advancing support, and the telescopic device is arranged on the advancing support.

Still include elasticity press roll, elasticity press roll is located respectively leak soil space below with on the support of marcing, elasticity press roll is including having the axis of rotation that elasticity press structure was arranged to the circumference, and elasticity press structure includes the sleeve base, slides and sets up slide bar in the sleeve base, with the press plate and the setting that the slide bar is connected are in compression spring on the sleeve base, sleeve base tip is provided with the footpath and contracts, the slide bar tip is provided with the boss, the press plate is the arc.

The working principle and the beneficial effects of the invention are as follows:

the invention discloses a high-precision scraper, which is characterized in that a hopper is drawn by a drawing device, a soil transporting device is arranged in the hopper, a satellite signal receiving device is arranged on the hopper, the flatness of the working ground of the scraper is measured, the soil transporting device in the hopper comprises a conveying crawler, a screening device is arranged at the discharge end of the conveying crawler, a soil distributing wheel is arranged below the screening device, a baffle plate forming an accommodating space with the soil distributing wheel is also arranged in the hopper, when the scraper works, the height of the scraper from the ground is adjusted by the satellite signal receiving device, after the height is calibrated, the scraper performs flat ground leveling operation on uneven ground, during the scraping process, the hopper levels the ground, soil higher than the calibrated height is shoveled into the hopper by the hopper, the soil shoveled into the hopper is conveyed to the screening device by the conveying crawler, the screening device performs screening treatment on the soil, and the first soil is loosened, secondly, impurity removal treatment is carried out, loose soil can fall into an accommodating space formed by a soil separating wheel and a baffle, at the moment, if the scraper passes through the ground lower than the elevation, the soil separating wheel can rotate, the screened quantitative soil is returned to the ground lower than the elevation according to the height difference, the soil fills the depression, the shoveled ground reaches the standard height, the effect of accurately shoveling and transporting flat ground can be achieved, in the prior art, laser elevation is generally adopted for shoveling and transporting, but the laser elevation is often limited by weather, such as strong wind and heavy fog, the operation and operation precision can be influenced, a satellite signal receiving device is adopted to avoid the situation and improve the precision, in addition, the traditional shoveling and transporting is difficult to reasonably calibrate the height according to the overall fluctuation level of the whole land, excessive shoveling and transporting is generally adopted to pursue flatness or rough shoveling and transporting, and the precision of the flatness is difficult to ensure, according to the equipment disclosed by the invention, after the reasonable height is calibrated, the hopper can level the higher part of the ground, redundant soil can quantitatively and accurately return to the concave ground through the conveying crawler and the soil dividing wheel, the land leveling precision is improved, finally, the screening device is additionally arranged, impurities in the soil can be screened, the soil quality is improved, a better growth environment is manufactured for subsequent crop seeding, and the problem of low land leveling precision of the scraper in the land leveling process in the prior art is solved based on the technical scheme.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an isometric view of the structure of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a top view of the structure of the present invention;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is an enlarged view of a portion of FIG. 5 at C;

FIG. 7 is an enlarged view of a portion of FIG. 5 at D;

in the figure: 1. traction device, 2, hopper, 3, earth-moving device, 4, satellite signal receiving device, 5, transmission crawler, 6, screening device, 7, earth-separating wheel, 8, baffle, 9, earth-moving plate, 10, support roller, 11, driven roller, 12, drive roller, 13, tension roller, 14, movable bearing seat, 15, screening plate, 16, slide block, 17, vibration driving device, 18, impurity bin, 19, strip hole, 20, structural plate, 21, earth-storing plate, 22, earth-leaking plate, 23, first earth-storing space, 24, earth-leaking space, 25, earth-moving tooth, 26, earth-separating space, 27, telescoping device, 28, opening, 29, traveling mechanism, 30, traveling bracket, 31, traveling wheel, 32, support cylinder, 33, elastic press roller, 34, rotating shaft, 35, sleeve base, 36, sliding rod, 37, compression spring, 38, press plate, 39, partition plate, 40, A second soil storage space 41, a sundry space 42, a soil unloading rotary plate 43 and a soil unloading channel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

as shown in fig. 1-7, the high-precision scraper comprises a traction device 1, a hopper 2 connected with the traction device 1, a shovel plate arranged on the hopper 2, an earth moving device 3 and a traveling mechanism 29 which are matched with the hopper 2, and a satellite signal receiving device 4 arranged on the hopper 2, wherein the earth moving device 3 comprises a conveying crawler 5, a screening device 6 arranged at one end of the conveying crawler 5, an earth distributing wheel 7 arranged below the screening device 6, and a baffle plate 8 which forms a containing space with the earth distributing wheel 7 is arranged in the hopper 2.

In the embodiment, a high-precision scraper is disclosed, which is characterized in that a traction device 1 pulls a hopper 2, a shovel plate is arranged on the hopper 2, a soil transporting device 3 and a traveling mechanism 29 are matched with the hopper 2, a satellite signal receiving device 4 is arranged on the hopper 2, the flatness of the working ground of the scraper is measured, the soil transporting device 3 in the hopper 2 comprises a conveying crawler 5, a screening device 6 is arranged at the discharge end of the conveying crawler 5, a soil distributing wheel 7 is arranged under the screening device 6, a baffle plate 8 forming a containing space with the soil distributing wheel 7 is further arranged in the hopper 2, the height of the scraper from the ground is adjusted through the satellite signal receiving device 4 during working, after the height is calibrated, the scraper performs ground leveling operation on uneven ground, in the process of scraping, the hopper 2 levels the ground, soil higher than the calibrated height is shoveled into the hopper 2 by the hopper 2, soil shoveled into the hopper 2 is conveyed to the screening device 6 through the conveying crawler 5, the screening device 6 screens the soil, the first soil is loosened, the second soil is purified, the loosened soil falls into an accommodating space formed by the soil dividing wheel 7 and the baffle 8, at the moment, if the shoveling and conveying machine passes through the ground lower than the elevation, the soil dividing wheel 7 rotates, the screened quantitative soil is returned to the ground lower than the elevation according to the height difference, the soil fills the depression, the shoveled and conveyed ground reaches the standard height, the effect of accurately shoveling and conveying flat ground can be achieved, in the prior art, laser elevation shoveling and conveying are generally adopted, but the laser elevation is often restricted by weather, operation and operation precision can be influenced if the weather is strong wind and strong fog, the situation can be avoided and the precision can be improved by adopting the satellite signal receiving device 4, in addition, the height can not be reasonably calibrated according to the overall fluctuation level of the ground in the traditional shoveling and conveying process, excessive shoveling is generally adopted to pursue leveling or rough shoveling, accuracy of leveling is difficult to guarantee, after a reasonable height is calibrated, the hopper 2 levels a higher part of the ground, redundant soil can be quantitatively and accurately returned to the sunken ground through the conveying crawler 5 and the soil distributing wheel 7, accuracy of flat ground is improved, finally, the screening device 6 is added, impurities in the soil can be screened, soil quality is improved, a better growth environment is manufactured for subsequent crop seeding, and based on the technical scheme, the problem that the flat ground accuracy is low in the process of leveling the ground by the shoveling and conveying machine in the prior art is solved.

Example 2

Based on the same concept as that of embodiment 1, the embodiment further provides that the front end of the feeding end of the bottom plate of the hopper 2 is convex, the conveying crawler 5 is provided with a soil shifting plate 9, and the soil shifting plate 9 conveys soil which is convex on the hopper 2.

In this embodiment, it is protruding at 2 bottom plate feed end front ends of hopper, still be provided with on conveying track 5 and dial native board 9, it has certain angle with conveying track 5 to dial native board 9, dial native board 9 to conveyer belt pivoted direction slope, the scraper transport in-process, the boss can make and be piled up at conveying track 5 front end by the soil of scraper transport in hopper 2, the scraper transport board 9 that sets up on conveying track 5 can carry soil to conveying track 5 from 2 front ends scraper transport of hopper on, the realization is to the conveying of the interior soil of hopper 2.

Further, still including supporting conveying track 5's backing roll 10, backing roll 10 is including setting up the driven voller 11, the setting of 2 entrance point bottom ends of hopper are in drive roller 12 and the setting of divide native wheel 7 top are in driven voller 11 with tensioning roller 13 between the drive roller 12, tensioning roller 13 sets up with the help of mobile bearing frame 14 on the hopper 2, conveying track 5 inclines to set up.

In this embodiment, conveying track 5 supports the operation through backing roll 10, backing roll 10 includes driven voller 11, drive roller 12 and tensioning roller 13, drive roller 12 drive conveying track 5 operates, driven voller 11 and tensioning roller 13 mainly play the effect of support, driven voller 11 is slightly less than tensioning roller 13 in hopper 2, conveying track 5 is more stable to the transportation of soil like this, avoid soil to omit in hopper 2, tensioning roller 13 takes movable bearing seat 14 to set up on hopper 2, promote conveying track 5's rate of tension, tensioning roller 13 is in the top of minute soil wheel 7, the soil that conveying track 5 carried has just fallen in the accommodation space at minute soil wheel 7 place.

Further, screening plant 6 including have the perforated screening board 15, with the slider 16 that screening board 15 is connected, screening board 15 sets up the below of conveying track 5 discharge end, slider 16 slides and sets up on the hopper 2, vibration drive 17 with slider 16 is connected, drives slider 16 vibrates along the direction of perpendicular to gos forward.

In this embodiment, screening plant 6 comprises screening board 15, slider 16 and drive arrangement, and when conveying track 5 carried screening plant 6 with soil, screening board 15 accepted soil, by drive arrangement drive slider 16 on hopper 2 reciprocating sliding, slider 16 drives screening board 15 and produces the vibration effect, and soil receives the vibration on the one hand and becomes loose, and on the other hand, debris in the soil are sieved by screening board 15, and the less high-quality soil of impurity falls into branch soil wheel 7 and the branch soil wheel 7 that constitutes enough with baffle 8 through the round hole on screening board 15.

Example 3

Based on the same concept as that of the embodiments 1 and 2, the embodiment further provides that the impurity box 18 is further included, one side, close to the screening plate 15, of the impurity box 18 is provided with a long hole 19, the screening plate 15 is obliquely arranged, one end in the advancing direction is a high point, and the screening plate 15 penetrates through the long hole 19.

In this embodiment, still be provided with miscellaneous workbin 18 at screening plant 6 rear end, offered rectangular hole 19 in the miscellaneous workbin 18 near one side of screening board 15, screening board 15 inclines to pass rectangular hole 19, and screening board 15 is the high point in scraper advancing direction, and in the working process, conveying track 5 carries soil behind screening board 15, and screening board 15 vibrates, and soil fine crushing part just drops to accommodation space from screening board 15, and impurity such as stone weeds etc. just has fallen into miscellaneous workbin 18, and when scraper work one cycle, miscellaneous workbin 18 just unloads the miscellaneous material of accumulation, realizes when the level land effect, carries out the dual process of clearance to the impurity in the soil, has promoted the application scope of scraper.

Further, the miscellaneous workbin 18 is close to one side of screening board 15 is structural slab 20, structural slab 20 is protruding to the direction of advancing, structural slab 20 with baffle 8 constitutes accommodation space, baffle 8 includes soil storage plate 21 and leaks native board 22, soil storage plate 21 with structural slab 20 first half constitutes first soil storage space 23, leak native board 22 with structural slab 20 lower board part constitutes and leaks native space 24, divide native wheel 7 to rotate and set up in leaking native space 24.

In this embodiment, the sundries box 18 is a structural plate 20 on one side close to the screening plate 15, the structural plate 20 and the baffle plate 8 form an accommodating space, the structural plate 20 protrudes in the forward direction of the scraper, and is divided from the protruding part, a first soil storing space 23 is formed between the upper part of the structural plate 20 and the soil storing plate 21 in the baffle plate 8, a soil leaking space 24 is formed between the lower part of the structural plate 20 and the soil leaking plate 22 in the baffle plate 8, the soil separating wheel 7 is rotatably arranged in the soil leaking space 24, when the screening plate 15 vibrates to screen soil, the fine and soft soil will fall into the first soil storing space 23 first, the structural plate 20 protrudes forward to form a better soil storing space with the soil separating wheel 7 and the soil storing plate 21 to avoid soil leaking, when the soil is detected to have a depression, the soil separating wheel 7 rotates according to the detected data to transport quantitative soil from the first soil storing space 23 to the soil leaking space 24, the materials fall from the gap at the bottom of the hopper 2 to fill the ground of the sunken part, so that the effect and the accuracy of the flat ground of the scraper are improved.

Further, the soil distributing wheel 7 is provided with soil shifting teeth 25 opposite to the rotating direction, and a soil distributing space 26 is formed between two adjacent soil shifting teeth 25.

In this embodiment, be provided with on the branch soil wheel 7 with rotation direction opposite's dialling native tooth 25, form between two adjacent dialling native teeth 25 and divide soil space 26, divide the volume of soil space 26 all be the ration and equal, so when dividing soil wheel 7 to rotate, carry the volume of leaking soil space 24 from first soil storage space 23 and be accurate controllable, the volume when returning soil to the soil is also controllable, the precision of level land further promotes.

Example 4

Based on the same conception with embodiment 1 ~ 3, this embodiment has still proposed still include with telescoping device 27 that miscellaneous workbin 18 connects, miscellaneous workbin 18 is in slide in the hopper 2, miscellaneous workbin 18 bottom is opening 28, be provided with baffle 39 in the miscellaneous workbin 18, baffle 39 will miscellaneous workbin 18 divide into second soil storage space 40 and miscellaneous material space 41, screening board 15 extends to miscellaneous material space 41 top be provided with the unloading commentaries on classics board 42 that has unloading passageway 43 under the second soil storage space 4041, hopper 2 bottom plate blocks miscellaneous material space 41 opening 28.

In this embodiment, the miscellaneous material box 18 slides in the hopper 2, the telescopic device 27 drives the miscellaneous material box to move, the telescopic device 27 can be an air cylinder or an oil cylinder, a partition plate 39 is further arranged in the miscellaneous material box 18, the miscellaneous material box 18 is divided into a second soil storage space 40 and an miscellaneous material space 41 by the partition plate 39, the bottoms of the two spaces are communicated with the opening 28, the opening 28 of the miscellaneous material space 41 is blocked by the bottom plate of the hopper 2, a soil unloading rotating plate 42 of a soil unloading channel 43 is arranged under the opening 28 of the second soil storage space 40, the screening plate 15 extends to the upper part of the miscellaneous material box 18 beyond the second soil storage space 40, when the screening plate 15 is used for screening, further screened soil falls into the second soil storage space 40, the miscellaneous materials continuously fall into the miscellaneous material box 18 along with vibration, when the soil in the second soil storage space 40 is still uneven after being padded by the first bedding, the soil unloading rotating plate 42, the soil unloading channel 43 is communicated with the second soil storage space 40, soil can fall off, the flatness of the soil is further improved, the bottom of the hopper 2 can block the opening 28 of the sundry space 41, after one operation period is finished, the sundry box 18 is pulled backwards by the telescopic device 27, the opening 28 at the bottom of the sundry space 41 is separated from the bottom plate of the hopper 2, sundries in the sundry box 18 can fall off to the outside for centralized processing, the land leveling precision is further improved, and the soil quality is also optimized.

Example 5

Based on the same concept as that of embodiments 1 to 4, the present embodiment further proposes that the traveling mechanism 29 includes a traveling bracket 30, a traveling wheel 31, and a support cylinder 32 hinged to the traveling bracket 30 and the hopper 2, the traveling wheel 31 is hinged to the traveling bracket 30, and the telescopic device 27 is disposed on the traveling bracket 30.

In this embodiment, the advancing mechanism connected to the hopper 2 includes an advancing bracket 30 and an advancing wheel 31 disposed on the advancing bracket 30, the advancing bracket 30 and the advancing wheel 31 provide an advancing function for the hopper 2, meanwhile, a supporting cylinder 32 is hinged to the advancing bracket 30, the supporting cylinder 32 is further hinged to the hopper 2, the supporting cylinder 32 can extend and retract to adjust the angle and height of the hopper 2, and the extending and retracting device 27 is mounted on the advancing bracket 30.

Example 6

Based on the same conception with embodiment 1 ~ 5, this embodiment has still proposed still including elasticity suppression roller 33, elasticity suppression roller 33 is located respectively leak native space 24 below with on advancing the support 30, elasticity suppression roller 33 is including the axis of rotation 34 that has the circumference and arranges elasticity suppression structure, and elasticity suppression structure includes sleeve base 35, slides and sets up slide bar 36 in the sleeve base 35, with suppression board 38 and the setting that slide bar 36 is connected are in compression spring 37 on the sleeve base 35 is interior, sleeve base 35 tip is provided with the footpath and contracts, slide bar 36 tip is provided with the boss, suppression board 38 is the arc.

In this embodiment, an elastic pressing wheel is further installed on the hopper 2 and the traveling support 30, the elastic pressing wheel is installed below the soil leaking space 24 and on the traveling support 30, the elastic pressing wheel includes an elastic pressing structure and a rotating shaft 34, the circumference of the elastic pressing structure is arranged on the rotating shaft 34, the elastic pressing structure is composed of a sleeve base 35, a sliding rod 36, a compression spring 37 and a pressing plate 38, the circumference of the sleeve base 35 is arranged on the rotating shaft 34, the outlet end of the sleeve base 35 is provided with a diameter reduction, the sliding rod 36 is arranged in the sleeve base 35, the end of the sliding rod 36 is provided with a boss, the boss and the diameter reduction limit the sliding position of the sliding rod 36, the compression spring 37 is arranged in the sleeve base 35, one end of the compression spring 37 acts on the rotating shaft 34, the other end acts on the sliding rod 36, the sliding rod 36 is connected with the pressing plate 38, when primary soil discharging and secondary soil discharging are performed, elasticity press wheel all can carry out the suppression to ground and level and smooth, and the design of elasticity suppression also can avoid pressing too durable with the soil that renovates, has both promoted the roughness on level land, has also promoted the combination of soil and has avoided rolling too really simultaneously.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a high accuracy scraper, include draw gear (1), with hopper (2) that draw gear (1) is connected, set up shovel board on hopper (2), with hopper (2) complex fortune native device (3) and advancing mechanism (29) and setting are in satellite signal receiving arrangement (4) on hopper (2), its characterized in that, fortune native device (3) are in including conveying track (5), setting screening plant (6) of conveying track (5) one end, be located divide native wheel (7) under screening plant (6), still be provided with in hopper (2) with divide native wheel (7) to constitute accommodation space's baffle (8).

2. A high accuracy carry scraper according to claim 1, characterized in that the front end of the feed end of the bottom plate of the hopper (2) is convex, the conveying crawler (5) is provided with a soil shifting plate (9), and the soil shifting plate (9) conveys the soil convex on the hopper (2).

3. A high accuracy scraper in accordance with claim 1 characterized in that further comprises a support roller (10) supporting said conveyor belt (5), said support roller (10) comprising a driven roller (11) arranged at the bottom end of the inlet end of said hopper (2), a drive roller (12) arranged above said soil-dividing wheel (7) and a tension roller (13) arranged between said driven roller (11) and said drive roller (12), said tension roller (13) being arranged on said hopper (2) by means of a mobile bearing seat (14), said conveyor belt (5) being arranged obliquely.

4. A high precision scraper according to claim 1, characterized in that the screening device (6) comprises a screening plate (15) with circular holes, a slide (16) connected to the screening plate (15), the screening plate (15) is arranged below the discharge end of the conveyor track (5), the slide (16) is arranged on the hopper (2) in a sliding manner, and a vibration driving device (17) is connected to the slide (16) and drives the slide (16) to vibrate along a direction perpendicular to the advancing direction.

5. A high-precision scraper according to claim 1, characterized by further comprising a sundry box (18), wherein one side of the sundry box (18) close to the screening plate (15) is provided with a long hole (19), the screening plate (15) is arranged obliquely, one end of the forward direction is a high point, and the screening plate (15) penetrates through the long hole (19).

6. A high-precision scraper according to claim 1, characterized in that one side of the impurity box (18) close to the screening plate (15) is a structural plate (20), the structural plate (20) protrudes in the forward direction, the structural plate (20) and the baffle (8) form a containing space, the baffle (8) comprises a soil storing plate (21) and a soil leaking plate (22), the soil storing plate (21) and the upper half part of the structural plate (20) form a first soil storing space (23), the soil leaking plate (22) and the lower half part of the structural plate (20) form a soil leaking space (24), and the soil distributing wheel (7) is rotatably arranged in the soil leaking space (24).

7. A high accuracy scraper according to claim 1, characterized in that the soil distributing wheel (7) is provided with soil shifting teeth (25) which are opposite to the rotation direction, and a soil distributing space (26) is formed between two adjacent soil shifting teeth (25).

8. A high accuracy carry scraper according to claim 5, characterized by further comprising a telescoping device (27) connected with the miscellaneous material box (18), the miscellaneous material box (18) slides in the hopper (2), the bottom of the miscellaneous material box (18) is an opening (28), a partition plate (39) is arranged in the miscellaneous material box (18), the miscellaneous material box (18) is divided into a second soil storage space (40) and an miscellaneous material space (41) by the partition plate (39), the screening plate (15) extends to the upper side of the miscellaneous material space (41), a soil unloading rotary plate (42) with a soil unloading channel (43) is arranged under the second soil storage space (41), and the opening (28) of the miscellaneous material space (41) is blocked by the bottom plate of the hopper (2).

9. A high precision scraper according to claim 1 characterized in that the travelling mechanism (29) comprises a travelling support (30), a travelling wheel (31) and a support cylinder (32) articulated with the travelling support (30) and the hopper (2), the travelling wheel (31) being articulated with the travelling support (30), the telescopic device (27) being provided on the travelling support (30).

10. The high-precision scraper according to claim 9, characterized by further comprising elastic press rollers (33), wherein the elastic press rollers (33) are respectively located below the soil leaking space (24) and on the traveling bracket (30), the elastic press rollers (33) comprise a rotating shaft (34) with a circumferentially arranged elastic press structure, the elastic press structure comprises a sleeve base (35), a sliding rod (36) slidingly disposed in the sleeve base (35), a press plate (38) connected with the sliding rod (36), and a compression spring (37) disposed in the sleeve base (35), the end of the sleeve base (35) is provided with a radius, the end of the sliding rod (36) is provided with a boss, and the press plate (38) is arc-shaped.