CN114809161A

CN114809161A - River channel gravel cleaning device and construction method thereof

Info

Publication number: CN114809161A
Application number: CN202210456399.9A
Authority: CN
Inventors: 余顺海; 王明旭; 徐达凯; 靳记平; 张丰收; 郭磊; 杨明杰; 姬焕; 余小萌
Original assignee: First Engineering Bureau Of Henan Water Conservancy
Current assignee: First Engineering Bureau Of Henan Water Conservancy
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-07-29
Anticipated expiration: 2042-04-27
Also published as: CN114809161B

Abstract

The invention relates to the technical field of river channel cleaning, in particular to a river channel gravel cleaning device and a construction method thereof. The invention adopts a rotating mode to realize the function of intermittently excavating the river broken stones by the plurality of arc-shaped excavating buckets, and simultaneously, the invention can sieve and filter the sand, soil and the like accompanying the excavated broken stones through the first sieving holes of the conveying sieving cylinder and the second sieving holes of the arc-shaped excavating buckets.

Description

River channel gravel cleaning device and construction method thereof

Technical Field

The invention relates to the technical field of river channel cleaning, in particular to a river channel gravel cleaning device and a construction method thereof.

Background

Rivers are important channels for flowing water from land to lakes and oceans and are also important geological benefits for carrying sediments from land to oceans and lakes, and the flowing water of the rivers is accompanied by the carrying and accumulation of sand, stone and soil during flowing to form sand sediments with certain sedimentation characteristics.

Chinese utility model patent publication No. CN208594587U discloses a dry riverbed sandstone cleaning device for cleaning riverways, which is characterized in that a first motor is fixedly connected to the upper surface of the device body, the output end of the first motor is fixedly connected with a first threaded rod, the first threaded rod can be driven to rotate, the first threaded rod is sleeved with a first threaded pipe, the first threaded pipe is inlaid at the left end of a second connecting rod, the second connecting rod can be driven to move up and down, the second connecting rod is hinged with the first connecting rod, the first connecting rod is hinged with a sliding rod, the sliding rod is hinged with a fixed rod, the sliding rod can move circularly around a first pin shaft while the second connecting rod moves up and down, the angle of the sliding rod can be conveniently adjusted, the device can dig and clean the sandstone to a certain extent, but sand, earth and the like are accompanied in the process of digging, the device can not sieve and filter the sand and the soil, so that the sand and the soil are dug and removed together; meanwhile, the device has limited single crushed stone cleaning amount, so that the problem of low crushed stone cleaning efficiency is caused.

Disclosure of Invention

The invention provides a river channel gravel cleaning device and a construction method thereof, which can solve the problems.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a river course clearance rubble device, is including the transport screening section of thick bamboo that is used for carrying the rubble, be provided with on the axis in the transport screening section of thick bamboo and carry the axle, carry the axle both ends all to fix on the front and back end of carrying the screening section of thick bamboo through the bearing, and carry the rear end of axle to run through and carry the screening section of thick bamboo, carry epaxial helical blade of installing, and helical blade and the inside wall sliding contact who carries the screening section of thick bamboo, the top of carrying the screening section of thick bamboo is provided with supporting platform, the supporting platform front end is connected with carrying the screening section of thick bamboo through first connecting plate, the supporting platform rear end is connected with the second connecting plate, and second connecting plate lower extreme and carry the axle to rotate and be connected, it digs the mechanism to be provided with the rubble on the transport screening section of thick bamboo lateral wall, and the rubble digs the mechanism and is located between first connecting plate and the second connecting plate.

The rubble is dug and is got mechanism and is included the outer loop fixed plate, the outer loop fixed plate that distributes about two is fixed to be installed on carrying screening section of thick bamboo lateral wall, is located and carries screening section of thick bamboo left end the left end at carrying screening section of thick bamboo is fixed to the outer loop fixed plate, rotate on the outer loop fixed plate lateral wall and install the swivel becket, and circumference evenly connected with on the swivel becket lateral wall extends the fixed part, two that distribute around extend and be connected with the arc bucket between the fixed part.

Carry the axle left end to install drive sprocket through the spline, and drive sprocket is located the left side of carrying the screening section of thick bamboo, the supporting platform up end is installed through the motor cabinet and is rotated the motor, and rotates the motor output and install drive sprocket, be connected through the chain between drive sprocket and the drive sprocket, the chain pivoted perforating hole of being convenient for is seted up to the supporting platform left end, carry axle left end circumference evenly connected with a plurality of drive bars, and the drive bar is kept away from the one end of carrying the axle and is fixed on the swivel becket.

As a preferred technical scheme, a feed inlet is formed in one side, away from a conveying and screening cylinder, of an arc-shaped bucket, an included angle between the radius of the feed inlet and the radius of the conveying and screening cylinder is smaller than 90 degrees, an excavating plate is hinged to one end, away from the conveying and screening cylinder, of the arc-shaped bucket, a discharge port is formed in one side, close to the conveying and screening cylinder, of the arc-shaped bucket, two arc-shaped guide rails distributed left and right are installed on the outer side wall, close to the side of the conveying and screening cylinder, of the arc-shaped bucket, an arc-shaped material blocking plate is arranged on the outer side wall, close to the side of the conveying and screening cylinder, of the arc-shaped bucket in a sliding mode, and the left end and the right end of the arc-shaped material blocking plate are respectively arranged on the two arc-shaped guide rails in a sliding mode.

As a preferable technical scheme of the invention, a rectangular guide rail is installed at one end of the extension fixing part, which is far away from the arc-shaped bucket, a driving strip is slidably arranged on the rectangular guide rail, a guide ring is installed at one end of the rectangular guide rail, which is far away from the conveying and screening cylinder, one end of the driving strip, which is close to the guide ring, is connected with a steel wire rope, and one end of the steel wire rope, which is far away from the driving strip, penetrates through the guide ring and is connected to the digging plate.

The one end that the arc bucket was kept away from to outer loop fixed plate has seted up the direction annular, direction annular lower extreme is provided with downward convex arc wall, and arc wall and direction annular intercommunication, the drive strip is kept away from wire rope's one end and is installed the control lever, and the control lever slides and set up in direction annular and arc wall converge.

As a preferred technical scheme of the invention, the outer walls of the left end and the right end of the arc-shaped bucket are hinged with elastic telescopic rods, and the telescopic ends of the elastic telescopic rods are hinged on the arc-shaped material baffle.

Both ends all are connected with the pole that opens and shuts about arc striker plate, the upper end of the relative inside wall of outer loop fixed plate is fixed with the cooperation pole of contradicting with the pole that opens and shuts.

As a preferred technical scheme of the invention, a plurality of first screening holes convenient for screening soil and sand are uniformly arranged on the outer side wall of the conveying screening cylinder in the circumferential direction; a plurality of second screening holes convenient for screening soil and sand are uniformly formed in the outer side wall of the arc-shaped bucket in the circumferential direction.

As a preferable technical scheme of the invention, the upper end of the conveying screening cylinder is provided with a pouring opening for discharging materials, the pouring opening is positioned between the two outer ring fixing plates, the lower end of the conveying screening cylinder is provided with a discharging opening for discharging materials, and the discharging opening is positioned at the right end of the conveying screening cylinder.

As a preferable technical scheme of the invention, an inclined plane structure convenient for material digging is arranged at one end of the digging plate far away from the arc-shaped digging bucket and at a corner facing the conveying and screening cylinder, and a plurality of through rectangular holes are uniformly formed at one end of the digging plate far away from the arc-shaped digging bucket from left to right.

In addition, the invention also provides a construction method of the river channel gravel cleaning device in the process of cleaning river channel gravel, which comprises the following steps: s1, device installation: the device is fixed on the existing mobile vehicle through a supporting platform, a first connecting plate and a second connecting plate, and a discharge port of the conveying screening cylinder is aligned to a conveying mechanism on the existing mobile vehicle, so that the crushed stone is conveyed to the mobile vehicle through the existing conveying mechanism;

s2, dredging river channel: the rotating ring drives the arc-shaped bucket to rotate under the driving of the rotating motor, when the arc-shaped bucket rotates to the lower end of the conveying screening cylinder, crushed stones on a river channel can be excavated, and when the arc-shaped bucket rotates to the upper end of the conveying screening cylinder, the crushed stones in the arc-shaped bucket are dumped into the conveying screening cylinder through the discharge port;

s3, screening broken stones: when the crushed stone is in the arc-shaped bucket and the arc-shaped bucket rotates along with the conveying screening cylinder, the second screening holes in the arc-shaped bucket can screen soil and sand mixed in the crushed stone, and meanwhile, the first screening holes in the conveying screening cylinder can also screen and filter the crushed stone;

s4, discharging broken stones: make under the drive of rotating the motor carry the axle to drive helical blade and rotate for the rubble in carrying the screening section of thick bamboo removes towards the discharge gate under helical blade's promotion, thereby makes the rubble empty to the transport mechanism on the current locomotive on.

The invention has the beneficial effects that: 1. the invention adopts a rotating mode to realize the function of intermittently excavating the river broken stones by the plurality of arc-shaped excavating buckets, and simultaneously, the invention can sieve and filter the sand, soil and the like accompanying the excavated broken stones through the first sieving holes of the conveying sieving cylinder and the second sieving holes of the arc-shaped excavating buckets.

2. According to the invention, the digging plate is hinged at the feed inlet of the arc-shaped bucket, so that the digging plate can be matched with the arc-shaped bucket to shovel the broken stones in the river channel, and further the single digging amount of the arc-shaped bucket is increased; simultaneously when the arc bucket that digs and get the rubble rotate to carry the screening section of thick bamboo top make the pole that opens and shuts contradict with the cooperation pole and realize that arc flitch rotates on the arc bucket to open the bin outlet of arc bucket, so that discharge the rubble in the arc bucket to carry in the screening section of thick bamboo.

3. According to the invention, the control rod is in sliding fit in the guide ring groove and the arc-shaped groove, so that the function of opening and closing the digging plate at the feed inlet of the arc-shaped bucket is realized, the arc-shaped bucket is matched with the arc-shaped groove to open the digging plate when rotating downwards, and the arc-shaped bucket is matched with the guide ring groove to close the digging plate when rotating upwards from the bottom of the conveying screening cylinder, so that the function of automatically opening and closing the feed inlet is realized.

Drawings

The invention is further illustrated with reference to the following figures and examples.

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

Fig. 2 is a schematic structural view of the present invention after the first connection plate is removed.

Fig. 3 is an enlarged view of a portion of the invention at a in fig. 2.

Fig. 4 is a schematic view showing the construction among the rock breaking and excavating device, the conveying shaft and the screw blade of the present invention.

Fig. 5 is a partial enlarged view of the invention at B in fig. 4.

Fig. 6 is a front view of the present invention.

Fig. 7 is a cross-sectional view taken at X-X of fig. 6 in accordance with the present invention.

Fig. 8 is a cross-sectional view taken at Y-Y of fig. 6 in accordance with the present invention.

Fig. 9 is an enlarged view of a portion of the invention at C in fig. 8.

In the figure: 1. a conveying screening drum; 11. a delivery shaft; 111. a drive sprocket; 12. a helical blade; 13. a first screening aperture; 14. pouring a spout; 15. a discharge port; 2. a support platform; 21. a first connecting plate; 22. a second connecting plate; 3. a gravel digging mechanism; 31. an outer ring fixing plate; 311. a guide ring groove; 312. an arc-shaped slot; 313. a mating rod; 32. a rotating ring; 321. an extension fixing part; 322. a drive bar; 33. an arc-shaped bucket; 331. a feed inlet; 332. digging a plate; 333. an arc-shaped guide rail; 334. an arc striker plate; 3341. an opening and closing lever; 34. a rectangular guide rail; 335. a second screening aperture; 336. a rectangular hole; 341. a drive bar; 342. a guide ring; 343. a wire rope; 344. a control lever; 35. an elastic telescopic rod; 4. rotating the motor; 41. a drive sprocket; 42. a chain; 43. a through hole.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. In this process, the width of the lines or the size of the components in the drawings may be exaggerated for clarity and convenience of description.

The following terms are defined based on the functions of the present invention, and may be different depending on the intention of the user or the convention. Therefore, these terms are defined based on the entire contents of the present specification.

Referring to fig. 1, 2, 4 and 6, a river channel gravel cleaning device comprises a conveying screening drum 1 for conveying gravel, a conveying shaft 11 is arranged on the axis in the conveying screening cylinder 1, two ends of the conveying shaft 11 are fixed on the front end and the rear end of the conveying screening cylinder 1 through bearings, the rear end of the conveying shaft 11 penetrates through the conveying screening cylinder 1, the conveying shaft 11 is provided with a helical blade 12, and the helical blade 12 is in sliding contact with the inner side wall of the conveying screening cylinder 1, a supporting platform 2 is arranged above the conveying screening cylinder 1, the front end of the supporting platform 2 is connected with the conveying screening drum 1 through a first connecting plate 21, the rear end of the supporting platform 2 is connected with a second connecting plate 22, the lower end of the second connecting plate 22 is rotatably connected with the conveying shaft 11, the outer side wall of the conveying screening drum 1 is provided with a gravel excavating mechanism 3, and the gravel excavating mechanism 3 is positioned between the first connecting plate 21 and the second connecting plate 22; the upper end of the conveying and screening cylinder 1 is provided with a pouring opening 14 for pouring materials, the pouring opening 14 is located between the two outer ring fixing plates 31, the lower end of the conveying and screening cylinder 1 is provided with a discharge opening 15 for discharging materials, and the discharge opening 15 is located at the right end of the conveying and screening cylinder 1.

During specific work, this device passes through supporting platform 2, first connecting plate 21 and second connecting plate 22 are fixed on current locomotive, and carry the discharge gate 15 of screening section of thick bamboo 1 and aim at on the conveying mechanism on the current locomotive, so that the rubble is carried on the locomotive through current conveying mechanism, and then make this device move on the river course along with current locomotive, the in-process rubble of removing simultaneously is dug and is got mechanism 3 and can dig the rubble in the river course, and transfer the rubble to carry in the screening section of thick bamboo 1 through pouring opening 14, later through carrying epaxial helical blade 12 with carry the rubble in the screening section of thick bamboo 1 to empty to the conveying mechanism on the current locomotive through discharge gate 15 on, so that follow-up rubble on the conveying mechanism transports.

Referring to fig. 1 to 8, the rubble is dug and is got mechanism 3 and includes outer loop fixed plate 31, carry on the 1 lateral wall of screening section of thick bamboo fixed mounting have about two outer loop fixed plates 31 that distribute, be located and carry the 1 left end of screening section of thick bamboo the left end at carrying screening section of thick bamboo 1 is fixed to outer loop fixed plate 31, rotate on the outer loop fixed plate 31 lateral wall and install swivel becket 32, and circumference evenly connected with on the swivel becket 32 lateral wall extends fixed part 321, two that distribute around extend and be connected with arc bucket 33 between the fixed part 321.

Referring to fig. 1, 2, 3, 6, 7 and 8, conveying shaft 11 left end installs drive sprocket 111 through the spline, and drive sprocket 111 is located the left side of carrying screening section of thick bamboo 1, supporting platform 2 up end is installed through the motor cabinet and is rotated motor 4, and rotates the output of motor 4 and install drive sprocket 41, be connected through chain 42 between drive sprocket 41 and the drive sprocket 111, the perforating hole 43 that is convenient for chain 42 to rotate is seted up to supporting platform 2 left end, conveying shaft 11 left end circumference evenly is connected with a plurality of drive bars 322, and the one end that the drive bar 322 kept away from conveying shaft 11 is fixed on swivel 32.

During specific work, under the drive of rotation motor 4 and drive sprocket 111, cooperation between drive sprocket 41 and the chain 42 three makes transport axle 11 rotate, make simultaneously through drive strip 322 and carry axle 11 to drive a swivel becket 32 and rotate, and then drive arc bucket 33 synchronous rotation through extending fixed part 321, thereby make a plurality of arc buckets 33 of carrying the screening section of thick bamboo 1 outside dig the rubble in the river course ceaselessly, and carry constantly and carry in the screening section of thick bamboo 1, realize that the intermittent type of rubble is dug and the function that the intermittent type is emptyd to carrying in the screening section of thick bamboo 1.

Referring to fig. 1 to 9, arc bucket 33 keep away from one side of carrying screening section of thick bamboo 1 and seted up feed inlet 331, and feed inlet 331 and carry the contained angle between the screening section of thick bamboo 1 radius to be less than 90, feed inlet 331 keeps away from the one end of carrying screening section of thick bamboo 1 and articulates there is digging plate 332, the bin outlet (not shown in the figure) has been seted up to one side that arc bucket 33 is close to and carries screening section of thick bamboo 1, arc guide rail 333 that distributes about installing two on the lateral wall that arc bucket 33 is close to and carries screening section of thick bamboo 1 one side, arc bucket 33 slides on being close to the lateral wall that carries screening section of thick bamboo 1 one side and is provided with arc striker plate 334, and arc striker plate 334 slides respectively to set up on two arc guide rail 333 about both ends.

During specific work, when the arc-shaped bucket 33 rotates towards the lower part of the conveying and screening cylinder 1, the bucket plate 332 rotates towards the direction which is far away from the conveying and screening cylinder 1, so that the feed port 331 is opened, further when the arc-shaped bucket 33 rotates to the lower part of the conveying and screening cylinder 1, the arc-shaped bucket 33 can dig broken stones in a river channel through the matching of the feed port 331 and the bucket plate 332, when the arc-shaped bucket 33 starts to rotate upwards, the bucket plate 332 rotates towards the direction which closes the feed port 331 until the feed port 331 is completely closed, and then when the arc-shaped bucket 33 rotates to the upper part of the conveying and screening cylinder 1, the arc-shaped baffle plate 334 is moved, so that the broken stones in the arc-shaped bucket 33 are poured into the conveying and screening cylinder 1 through the discharge port.

Referring to fig. 3, 5 and 7, a rectangular guide rail 34 is installed at one end of the extension fixing portion 321 away from the arc-shaped bucket 33, a driving strip 341 is slidably installed on the rectangular guide rail 34, a guide ring 342 is installed at one end of the rectangular guide rail 34 away from the conveying and sieving cylinder 1, a steel wire rope 343 is connected to one end of the driving strip 341 close to the guide ring 342, and one end of the steel wire rope 343 away from the driving strip 341 passes through the guide ring 342 and is connected to the digging plate 332; the one end that arc bucket 33 was kept away from to outer loop fixed plate 31 has seted up direction annular 311, direction annular 311 lower extreme is provided with downward convex arc groove 312, and arc groove 312 and direction annular 311 intercommunication, the drive strip 341 is kept away from the one end of wire rope 343 and is installed control lever 344, and control lever 344 slides and sets up in direction annular 311 and arc groove 312 converge.

During operation, when the rotating ring 32 rotates, the driving bar 341 is driven to rotate through the rectangular guide rail 34, so that the control rod 344 on the driving bar 341 moves in the guide ring groove 311 and the arc-shaped groove 312, when the arc-shaped bucket 33 rotates towards the lower part of the conveying and sieving cylinder 1 and the control rod 344 moves to the arc-shaped groove 312, the driving bar 341 moves towards the direction away from the axis of the conveying and sieving cylinder 1, so that the steel wire rope 343 does not limit the pulling of the bucket 332, and the bucket 332 can rotate towards the direction away from the conveying and sieving cylinder 1 under the action of self gravity, so that the arc-shaped bucket 33 can be matched with the bucket 332 to dig crushed stones, and then when the arc-shaped bucket 33 rotates towards the upper part of the conveying and sieving cylinder 1, the control rod 344 starts to move from the arc-shaped groove 312 towards the guide ring groove 311, so that the driving bar 341 moves towards the axis of the conveying and sieving cylinder 1, and the driving bar 341 rotates towards the direction of the conveying and sieving cylinder 1 through the steel wire rope 343, until the feed port 331 of the arc-shaped bucket 33 is closed.

Referring to fig. 8 and 9, the outer walls of the left and right ends of the arc-shaped bucket 33 are hinged with elastic telescopic rods 35, and the telescopic ends of the elastic telescopic rods 35 are hinged with the arc-shaped material baffle 334; the left end and the right end of the arc-shaped material baffle 334 are both connected with the opening and closing rod 3341, and the upper end of the inner side wall of the outer ring fixing plate 31 opposite to the inner side wall is fixed with a matching rod 313 abutted against the opening and closing rod 3341.

During specific work, when the arc-shaped excavator bucket 33 with the excavated gravel rotates towards the upper side of the conveying sieving cylinder 1, the opening and closing rod 3341 on the arc-shaped striker plate 334 begins to collide with the matching rod 313 fixed on the outer ring fixing plate 31, and the arc-shaped striker plate 334 begins to be prevented from rotating synchronously with the arc-shaped excavator bucket 33, so that the arc-shaped striker plate 334 rotates on the outer side wall of the arc-shaped excavator bucket 33, and then the discharge port of the arc-shaped excavator bucket 33 is opened, so that the gravel in the arc-shaped excavator bucket 33 falls into the conveying sieving cylinder 1 through the dumping port 14 of the conveying sieving cylinder 1, then the arc-shaped excavator bucket 33 continues to rotate, and after the opening and closing rod 3341 is moved away from the top of the matching rod 313, the discharge port is blocked again by the arc-shaped striker plate 334 under the pulling of the elastic telescopic rod 35.

Referring to fig. 1 to 7, a plurality of first screening holes 13 facilitating soil and sand screening are uniformly formed in the outer side wall of the conveying and screening cylinder 1 in the circumferential direction; a plurality of second screening holes 335 convenient for screening soil and sand are uniformly formed in the circumferential direction on the outer side wall of the arc-shaped bucket 33.

In specific work, the excavated broken stones can be screened and filtered through the first screening holes 13 and the second screening holes 335, so that soil, sand and the like contained in the excavated broken stones can be screened and filtered.

Referring to fig. 4 and 5, an inclined plane structure convenient for material digging is arranged at one end of the digging plate 332 far away from the arc-shaped digging bucket 33 and towards the corner of the conveying and screening cylinder 1, and a plurality of through rectangular holes 336 are uniformly formed in one end of the digging plate 332 far away from the arc-shaped digging bucket 33 from left to right. The digging plate 332 can dig some broken stones embedded in soil and sand through the inclined surface structure, so that the cleaning effect of the broken stones is improved, and meanwhile, a part of soil and sand can be filtered through the rectangular holes 336.

In addition, the invention also provides a construction method of the river channel gravel cleaning device in the process of cleaning river channel gravel, which comprises the following steps: s1, device installation: the device is fixed on an existing moving vehicle (not shown in the figure) through the supporting platform 2, the first connecting plate 21 and the second connecting plate 22, and the discharge port 15 of the conveying screening drum 1 is aligned on a conveying mechanism (not shown in the figure) on the existing moving vehicle, so that the broken stones can be conveyed to the moving vehicle through the existing conveying mechanism.

S2, dredging river channel: make swivel ring 32 drive arc bucket 33 rotate under the drive of rotation motor 4, can dig the rubble on the river course when arc bucket 33 rotates to transport screening section of thick bamboo 1 lower extreme, when arc bucket 33 rotated and carries screening section of thick bamboo 1 upper end, rubble in the arc bucket 33 bucket inclines into in the transport screening section of thick bamboo 1 through the bin outlet.

S3, screening broken stones: when the rubble was in arc bucket 33 and arc bucket 33 rotates along with carrying screening section of thick bamboo 1, second screening hole 335 on arc bucket 33 can sieve mixed earth and sand in the rubble, carries the first screening hole 13 in the screening section of thick bamboo 1 simultaneously also can sieve the rubble and filter.

S4, discharging broken stones: under the drive of the rotating motor 4, the conveying shaft 11 drives the spiral blade 12 to rotate, so that the crushed stones in the conveying and screening cylinder 1 move towards the discharge port 15 under the pushing of the spiral blade 12, and the crushed stones are poured onto the conveying mechanism on the existing movable vehicle.

The present invention has been described in terms of the preferred embodiment, and it is not intended to be limited to the embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A river channel gravel cleaning device comprises a conveying screening cylinder (1) for conveying gravel, wherein a conveying shaft (11) is arranged on an axis in the conveying screening cylinder (1), the two ends of the conveying shaft (11) are fixed to the front end and the rear end of the conveying screening cylinder (1) through bearings, the rear end of the conveying shaft (11) penetrates through the conveying screening cylinder (1), spiral blades (12) are mounted on the conveying shaft (11), the spiral blades (12) are in sliding contact with the inner side wall of the conveying screening cylinder (1), a supporting platform (2) is arranged above the conveying screening cylinder (1), the front end of the supporting platform (2) is connected with the conveying screening cylinder (1) through a first connecting plate (21), the rear end of the supporting platform (2) is connected with a second connecting plate (22), and the lower end of the second connecting plate (22) is rotatably connected with the conveying shaft (11), the method is characterized in that: the outer side wall of the conveying and screening cylinder (1) is provided with a gravel excavating mechanism (3), and the gravel excavating mechanism (3) is positioned between the first connecting plate (21) and the second connecting plate (22); wherein:

the gravel excavating mechanism (3) comprises an outer ring fixing plate (31), two outer ring fixing plates (31) distributed left and right are fixedly arranged on the outer side wall of the conveying and screening cylinder (1), the outer ring fixing plate (31) positioned at the left end of the conveying and screening cylinder (1) is fixed at the left end of the conveying and screening cylinder (1), a rotating ring (32) is rotatably arranged on the outer side wall of the outer ring fixing plate (31), extension fixing parts (321) are uniformly connected to the outer side wall of the rotating ring (32) in the circumferential direction, and an arc-shaped excavating bucket (33) is connected between the two extension fixing parts (321) distributed front and back;

carry axle (11) left end to install drive sprocket (111) through the spline, and drive sprocket (111) are located the left side of carrying screening section of thick bamboo (1), supporting platform (2) up end is installed through the motor cabinet and is rotated motor (4), and rotates motor (4) output and install drive sprocket (41), be connected through chain (42) between drive sprocket (41) and drive sprocket (111), supporting platform (2) left end is seted up chain (42) pivoted perforating hole (43) of being convenient for, carry axle (11) left end circumference evenly connected with a plurality of driving strips (322), and driving strip (322) keep away from the one end of carrying axle (11) and fix on swivel becket (32).

2. The device of claim 1, wherein: arc bucket (33) keep away from one side of carrying screening section of thick bamboo (1) and seted up feed inlet (331), and feed inlet (331) and carry the contained angle between the screening section of thick bamboo (1) radius to be less than 90, the one end of keeping away from carrying screening section of thick bamboo (1) in feed inlet (331) articulates there is digging plate (332), the bin outlet has been seted up to one side that arc bucket (33) are close to and carry screening section of thick bamboo (1), arc bucket (33) are close to and install arc guide rail (333) of two left and right sides distributions on the lateral wall of carrying screening section of thick bamboo (1) one side, arc bucket (33) slide on being close to the lateral wall of carrying screening section of thick bamboo (1) one side and are provided with arc striker plate (334), and arc striker plate (334) left and right sides both ends slide respectively and set up on two arc guide rail (333).

3. The device of claim 2, wherein: a rectangular guide rail (34) is installed at one end, far away from the arc-shaped bucket (33), of the extending fixing portion (321), a driving strip (341) is arranged on the rectangular guide rail (34) in a sliding mode, a guide ring (342) is installed at one end, far away from the conveying and screening cylinder (1), of the rectangular guide rail (34), one end, close to the guide ring (342), of the driving strip (341) is connected with a steel wire rope (343), and one end, far away from the driving strip (341), of the steel wire rope (343) penetrates through the guide ring (342) and is connected to the digging plate (332);

outer loop fixed plate (31) are kept away from the one end of arc bucket (33) and have been seted up direction annular (311), direction annular (311) lower extreme is provided with convex arc groove (312) downwards, and arc groove (312) and direction annular (311) intercommunication, the one end that wire rope (343) were kept away from in drive strip (341) is installed control lever (344), and control lever (344) slide to set up in direction annular (311) and arc groove (312) converge.

4. The device of claim 2, wherein: the outer walls of the left end and the right end of the arc-shaped bucket (33) are hinged with elastic telescopic rods (35), and the telescopic ends of the elastic telescopic rods (35) are hinged on the arc-shaped material baffle (334);

the left end and the right end of the arc-shaped material baffle plate (334) are both connected with an opening and closing rod (3341), and a matching rod (313) which is abutted against the opening and closing rod (3341) is fixed at the upper end of the inner side wall, relative to the outer ring fixing plate (31).

5. The device of claim 1, wherein: a plurality of first screening holes (13) which are convenient for screening soil and sand are uniformly formed in the circumferential direction on the outer side wall of the conveying and screening cylinder (1); a plurality of second screening holes (335) convenient for screening soil and sand are uniformly formed in the circumferential direction on the outer side wall of the arc-shaped bucket (33).

6. The device of claim 1, wherein: the upper end of the conveying and screening cylinder (1) is provided with a pouring opening (14) for discharging materials, the pouring opening (14) is located between the two outer ring fixing plates (31), the lower end of the conveying and screening cylinder (1) is provided with a discharging opening (15) for discharging materials, and the discharging opening (15) is located at the right end of the conveying and screening cylinder (1).

7. The device of claim 2, wherein: digging plate (332) keep away from the one end of arc bucket (33) and be provided with the inclined plane structure of being convenient for dig the material towards the corner of carrying screening section of thick bamboo (1), just digging plate (332) keep away from the one end of arc bucket (33) and turn right from a left side and evenly seted up a plurality of rectangular holes (336) that link up.

8. The device of claim 1, wherein: the construction method for cleaning the river channel gravels by adopting the river channel gravels cleaning device comprises the following steps:

s1, device installation: the device is fixed on the existing moving vehicle through a supporting platform (2), a first connecting plate (21) and a second connecting plate (22), and a discharge hole (15) of a conveying screening cylinder (1) is aligned to a conveying mechanism on the existing moving vehicle, so that broken stones can be conveyed to the moving vehicle through the existing conveying mechanism;

s2, dredging river channel: the rotating ring (32) drives the arc-shaped bucket (33) to rotate under the driving of the rotating motor (4), when the arc-shaped bucket (33) rotates to the lower end of the conveying screening cylinder (1), crushed stones on a river channel can be dug, and when the arc-shaped bucket (33) rotates to the upper end of the conveying screening cylinder (1), the crushed stones in the arc-shaped bucket (33) are dumped into the conveying screening cylinder (1) through a discharge port;

s3, screening broken stones: when the crushed stones are in the arc-shaped bucket (33) and the arc-shaped bucket (33) rotates along with the conveying and screening cylinder (1), the second screening holes (335) on the arc-shaped bucket (33) can screen soil and sand mixed in the crushed stones, and meanwhile, the first screening holes (13) in the conveying and screening cylinder (1) can also screen and filter the crushed stones;

s4, discharging broken stones: under the drive of the rotating motor (4), the conveying shaft (11) drives the spiral blade (12) to rotate, so that the crushed stones in the conveying and screening cylinder (1) move towards the discharge port (15) under the pushing of the spiral blade (12), and the crushed stones are poured onto the conveying mechanism on the existing moving vehicle.