CN212641570U

CN212641570U - Channel desilting device for irrigation and water conservancy project

Info

Publication number: CN212641570U
Application number: CN202020783299.3U
Authority: CN
Inventors: 郑本玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2021-03-02
Anticipated expiration: 2030-05-12

Abstract

The utility model discloses a channel desilting device for irrigation and water conservancy project, including three group's mud scrapers, a conveying cylinder, guide pulley and support frame, the hob, the conveying motor, and a support, height adjusting device, silt dewatering device, four group's landing legs and four group's gyro wheels, the lower part of the left end of a conveying cylinder is provided with into mud mouth, the right-hand member of three group's mud scrapers respectively with the front portion of advancing mud mouth, rear portion and sub-unit connection, be provided with the conveying chamber in the conveying cylinder, the bottom of hob can turn to send with the lower wall in conveying chamber and be connected, the top that a conveying cylinder was passed on the top of hob is connected with the output of conveying motor, the upper portion of the right-hand member of a conveying cylinder is provided with out mud mouth, the bottom of the right-hand member of a conveying. The utility model discloses, can reduce the artifical quantity that the desilting was used, reduce artificial intensity of labour, reduce the cost of labor, can carry out dehydration with the silt of clearance moreover, the manpower and materials have been practiced thrift in the transportation of being convenient for.

Description

Channel desilting device for irrigation and water conservancy project

Technical Field

The utility model relates to a irrigation and water conservancy engineering technical field specifically is a channel desilting device for irrigation and water conservancy engineering.

Background

The irrigation channel is a water channel connecting irrigation water source and land, and can deliver and distribute water quantity drawn from water source to every portion of farmland, and the irrigation channel can be divided into open channel and closed channel: the open channel is built on the ground and has a free water surface; the closed channel is an underground water channel with closed periphery, and is an open channel adopted in most areas of China. The open channel is exposed on the ground surface, so that the soil on the ground can easily fall into the channel, the sludge in the channel can be accumulated and thickened for a long time, and the water delivery quantity and the water delivery speed of the open channel are seriously influenced, so that the dredging work in the channel is required every three years, most regions adopt a manual dredging mode, the dredging mode has the advantages of large workload, high labor intensity, high labor cost and poor dredging effect, the investment of relevant manpower and material resources of the government is increased, the cleaned sludge needs to be conveyed to places other than farmlands, the water content of the sludge is large, the transportation is difficult, and a large amount of manpower and material resources are wasted.

Therefore, a channel dredging device for the farmland hydraulic engineering is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a channel desilting device for irrigation and water conservancy project can reduce the artifical quantity that the desilting was used, reduces artificial intensity of labour, reduces the cost of labor, can carry out dehydration with the silt of clearance moreover, and the manpower and materials have been practiced thrift in the transportation of being convenient for to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a channel dredging device for farmland hydraulic engineering comprises three groups of mud scrapers, a conveying cylinder, a guide wheel, a supporting frame, a screw rod, a conveying motor, a support, a height adjusting device, a sludge dewatering device, four groups of supporting legs and four groups of rollers, wherein the lower part of the left end of the conveying cylinder is provided with a mud inlet, the right ends of the three groups of mud scrapers are respectively connected with the front part, the rear part and the lower part of the mud inlet, a conveying cavity is arranged in the conveying cylinder, the bottom end of the screw rod is connected with the lower wall of the conveying cavity in a rotatable manner, the top end of the screw rod penetrates through the top end of the conveying cylinder to be connected with the output end of the conveying motor, the upper part of the right end of the conveying cylinder is provided with a mud outlet, the bottom of the right end of the conveying cylinder is connected with the front end of the supporting frame, the bottom end of the supporting frame is connected with the guide, the sludge dewatering device comprises a vibration motor, a sludge receiving hopper, a dewatering mesh screen, a dewatering box and a sludge discharge port, wherein a dewatering cavity is arranged in the dewatering box, the bottom end of the sludge receiving hopper is connected with the left part of the top end of the dewatering box, the sludge receiving hopper is positioned below the sludge outlet, the sludge receiving hopper is communicated with the dewatering cavity, the left end of the vibration motor is connected with the left wall of the dewatering cavity, the output end of the vibration motor is connected with the left end of the dewatering mesh screen, the front end and the rear end of the dewatering mesh screen are respectively connected with the front wall and the rear wall of the dewatering cavity, the left end of the sludge discharge port is connected with the right end of the dewatering box, the lower part of the front end and the lower part of the rear end of the dewatering box are respectively provided with a water discharge port, the bottom end of the dewatering box is connected with the support, and four corner position areas of the bottom end of the support are respectively connected with the top ends of four groups of the, the bottom ends of the four groups of supporting legs are respectively connected with the four groups of rollers.

Preferably, the height adjusting device comprises two groups of first hydraulic cylinders, a lifting plate, a second hydraulic cylinder, three groups of limiting rods, a lifting sleeve and a connecting plate, the top ends and the bottom ends of the three groups of limiting rods are respectively connected with the support, the middle area, the front part and the rear part of the lifting plate are respectively sleeved with the three groups of limiting rods, the bottom ends of the two groups of first hydraulic cylinders are both connected with the support, the top ends of the two groups of first hydraulic cylinders are respectively connected with the front part and the rear part of the lifting plate, the bottom end of the lifting sleeve is connected with the middle area of the top end of the lifting plate, the lifting sleeve is sleeved with the limiting rods in the middle area, the left end of the lifting sleeve is connected with the right end of the connecting plate, the left end of the connecting plate is rotatably connected with the left end of the conveying cylinder, one end of the second hydraulic cylinder is rotatably connected with the front half area of the left, the other end of the second hydraulic cylinder is rotatably connected with the lower part of the front end of the connecting plate.

Preferably, a grass blocking fence is arranged at the sludge inlet.

Preferably, baffles are arranged at the left part, the front part and the rear part of the top end of the dewatering screen.

Preferably, still include multiunit locating plate, multiunit reference column, multiunit positioning spring and multiunit set nut, the dehydration intracavity is provided with the multiunit positioning seat, the multiunit the top of locating plate respectively with the front portion and the rear portion of the bottom of dehydration mesh screen are connected, the multiunit the top of reference column respectively with the multiunit the bottom of locating plate is connected, the multiunit the top of positioning spring respectively with the multiunit the bottom of locating plate is connected, the multiunit the reference column respectively with the multiunit the positioning spring suit, the multiunit the bottom of positioning spring respectively with the multiunit the positioning seat is connected, the multiunit the bottom of reference column passes the multiunit respectively the positioning seat just respectively with the multiunit the set nut suit.

Preferably, the dewatering screen is in a shape of being higher at the left and lower at the right.

Preferably, the two groups of water outlets are provided with control valves.

Preferably, the sludge dewatering device further comprises a supporting rod and a handle, the left end of the supporting rod is connected with the lower portion of the right end of the dewatering box, the top end of the supporting rod is rotatably connected with the bottom end of the sludge discharge port, and the rear end of the handle is connected with the front end of the sludge discharge port.

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

the utility model discloses, when the user is carrying out the desilting operation, the user descends the conveying cylinder through height adjusting device, until the mud scraping plate can scrape silt, the user pulls the desilting device through the tractor to move, the mud scraping plate scrapes the silt, the silt enters the conveying cavity through the mud inlet, the conveying motor drives the screw rod to rotate, the screw rod conveys the silt upwards, the silt is discharged from the mud outlet, the silt falls into the mud receiving bucket after being discharged, the silt enters the dewatering cavity from the mud receiving bucket, the silt falls on the dewatering screen after entering the dewatering cavity, the vibrating motor drives the dewatering screen to vibrate, the dewatering screen vibrates and dewaters the silt, water leaks from the dewatering screen and falls on the bottom of the dewatering cavity and discharges the dewatering box through the outlet, the silt enters the mud outlet from the right end of the dewatering box after dewatering, the dewatering box discharges, the manual quantity that can reduce desilting use is reached, manual labor intensity is reduced, the labor cost is reduced, and the cleaned sludge can be dewatered, so that the sludge is convenient to transport, and manpower and material resources are saved.

Drawings

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

fig. 2 is a schematic sectional structure of the present invention;

fig. 3 is a schematic view of a partially enlarged structure at a in fig. 2 according to the present invention;

fig. 4 is a left side view structure diagram of the present invention;

fig. 5 is a schematic top view of the height adjusting device of the present invention.

In the figure: 1. a mud scraper; 2. a transfer drum; 3. a guide wheel; 4. a support frame; 5. a screw rod; 6. a transfer motor; 7. a support; 8. a support leg; 9. a roller; 10. a sludge outlet; 11. a vibration motor; 12. a mud receiving hopper; 13. dewatering mesh screen; 14. a dewatering box; 15. a sludge discharge port; 16. a water outlet; 17. a first hydraulic cylinder; 18. a lifting plate; 19. a second hydraulic cylinder; 20. a limiting rod; 21. a lifting sleeve; 22. a connecting plate; 23. grass blocking fences; 24. a baffle plate; 25. positioning a plate; 26. a positioning column; 27. a positioning spring; 28. positioning a nut; 29. positioning seats; 30. a control valve; 31. a strut; 32. a handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 5, the present invention provides a technical solution:

a channel dredging device for farmland hydraulic engineering is shown in figures 1-5 and comprises three groups of mud scrapers 1, a conveying cylinder 2, a guide wheel 3, a support frame 4, a screw rod 5, a conveying motor 6, a support frame 7, a height adjusting device, a sludge dewatering device, four groups of support legs 8 and four groups of rollers 9, wherein a mud inlet is formed in the lower part of the left end of the conveying cylinder 2, the right ends of the three groups of mud scrapers 1 are respectively connected with the front part, the rear part and the lower part of the mud inlet, a conveying cavity is formed in the conveying cylinder 2, the bottom end of the screw rod 5 is in conveying connection with the lower wall of the conveying cavity, the top end of the screw rod 5 penetrates through the top end of the conveying cylinder 2 and is connected with the output end of the conveying motor 6, a mud outlet 10 is formed in the upper part of the right end of the conveying cylinder 2, the bottom of the right end of the conveying cylinder 2 is connected, the bottom end of the supporting frame 4 is connected with the guide wheel 3, the conveying cylinder 2 is connected with the supporting frame 7 through the height adjusting device, the sludge dewatering device comprises a vibrating motor 11, a sludge receiving hopper 12, a dewatering mesh screen 13, a dewatering box 14 and a sludge discharge port 15, a dewatering cavity is arranged in the dewatering box 14, the bottom end of the sludge receiving hopper 12 is connected with the left part of the top end of the dewatering box 14, the sludge receiving hopper 12 is positioned below the sludge discharge port 10, the sludge receiving hopper 12 is communicated with the dewatering cavity, the left end of the vibrating motor 11 is connected with the left wall of the dewatering cavity, the output end of the vibrating motor 11 is connected with the left end of the dewatering mesh screen 13, the front end and the rear end of the dewatering mesh screen 13 are respectively connected with the front wall and the rear wall of the dewatering cavity, the left end of the sludge discharge port 15 is connected with the right end of the dewatering box 14, the lower part of the front end and the lower part of the rear end of the dewatering box 14 are both provided with a water discharge port 16, the bottom end of the dewatering box 14 is connected with the support 7, four corner position areas of the bottom end of the support 7 are respectively connected with the top ends of four groups of supporting legs 8, and the bottom ends of the four groups of supporting legs 8 are respectively connected with four groups of rollers 9;

specifically, as shown in fig. 1, the height adjusting device includes two sets of first hydraulic cylinders 17, a lifting plate 18, a second hydraulic cylinder 19, three sets of limit rods 20, a lifting sleeve 21 and a connecting plate 22, top ends and bottom ends of the three sets of limit rods 20 are respectively connected with the bracket 7, a middle area, a front portion and a rear portion of the lifting plate 18 are respectively sleeved with the three sets of limit rods 20, bottom ends of the two sets of first hydraulic cylinders 17 are both connected with the bracket 7, top ends of the two sets of first hydraulic cylinders 17 are respectively connected with the front portion and the rear portion of the lifting plate 18, a bottom end of the lifting sleeve 21 is connected with a middle area of the top end of the lifting plate 18, the lifting sleeve 21 is sleeved with the limit rods 20 in the middle area, a left end of the lifting sleeve 21 is connected with a right end of the connecting plate 22, and a left end of the connecting plate 22 is rotatably connected with a left end of the conveying cylinder, one end of the second hydraulic cylinder 19 is rotatably connected to the front half area of the left end of the lifting plate 18, and the other end of the second hydraulic cylinder 19 is rotatably connected to the lower portion of the front end of the connecting plate 22.

By adopting the technical scheme, the up-down direction and the left-right direction of the conveying cylinder 2 can be adjusted by the height adjusting device, a user synchronously adjusts the first hydraulic cylinder 17, the bottom end of the first hydraulic cylinder 17 is connected with the bracket 7, the top end of the first hydraulic cylinder 17 is connected with the lifting plate 18, the lifting plate 18 is slidably sleeved with the limiting rod 20, the top end of the lifting plate 18 is connected with the lifting sleeve 21, the lifting sleeve 21 is connected with the conveying cylinder 2 through the connecting plate 22, the first hydraulic cylinder 17 is adjusted, the first hydraulic cylinder 17 drives the lifting plate 18 to move up and down, the lifting plate 18 drives the lifting sleeve 21 to move so as to drive the conveying cylinder 2 to move up and down, the user adjusts the second hydraulic cylinder 19, one end of the second hydraulic cylinder 19 is connected with the lifting plate 18, the other end of the second hydraulic cylinder 19 is connected with the connecting plate 22, and the left end of the connecting, thereby the regulation of the left and right directions of control transfer cylinder 2, when the channel broad, the user operates dredging device and works in one side of channel, adjust transfer cylinder 2 to dredging device's the outside through second pneumatic cylinder 19, make things convenient for dredging device to carry out work, when the channel is narrower, the user strides dredging device in the channel top, the user adjusts transfer cylinder 2 to dredging device's left intermediate position through second pneumatic cylinder 19, the use limitation of dredging device has been reduced.

Specifically, as shown in fig. 4, a grass barrier fence 23 is arranged at the mud inlet.

Through adopting above-mentioned technical scheme, keep off grass fence 23 can reduce in weeds or other debris get into transfer cylinder 2 along with silt, influence transfer cylinder 2's normal work, improved the work efficiency of desilting device, strengthened the reliability of desilting device.

Specifically, as shown in fig. 2, baffles 24 are provided at the left, front and rear portions of the top end of the dewatering screen 13.

By adopting the technical scheme, the baffle plate 24 can prevent sludge from leaking from the gap between the dewatering screen 13 and the dewatering box 14, and the reliability of the dredging device is improved.

Specifically, as shown in fig. 2 to 3, the dewatering device further includes a plurality of sets of positioning plates 25, a plurality of sets of positioning columns 26, a plurality of sets of positioning springs 27 and a plurality of sets of positioning nuts 28, a plurality of sets of positioning seats 29 are disposed in the dewatering cavity, the top ends of the plurality of sets of positioning plates 25 are respectively connected to the front and the rear of the bottom end of the dewatering mesh 13, the top ends of the plurality of sets of positioning columns 26 are respectively connected to the bottom ends of the plurality of sets of positioning plates 25, the plurality of sets of positioning columns 26 are respectively sleeved with the plurality of sets of positioning springs 27, the bottom ends of the plurality of sets of positioning springs 27 are respectively connected to the plurality of sets of positioning seats 29, and the bottom ends of the plurality of sets of positioning columns 26 respectively penetrate through the plurality of.

Through adopting above-mentioned technical scheme, in silt dehydration process, vibrating motor 11 drives the vibration of dehydration mesh screen 13, reference column 26, positioning spring 27, locating plate 25 and positioning seat 29 play fixed position effect to dehydration mesh screen 13, positioning spring 27 has slowed down the impact force that dehydration mesh screen 13 produced positioning seat 29 when the vibration, has reduced the emergence of the condition that dehydration mesh screen 13 drops from positioning seat 29, has prolonged the life of desilting device, has improved the work efficiency of desilting device.

Specifically, as shown in fig. 2, the dewatering screen 13 is formed in a shape of being higher at the left side and lower at the right side.

Through adopting above-mentioned technical scheme, the silt after conveniently dehydrating gets into mud discharging port 15 from the right-hand member of dehydration mesh screen 13, has improved the work efficiency of sediment removal device.

Specifically, as shown in fig. 4, two sets of the water discharge ports 16 are provided with control valves 30.

Through adopting above-mentioned technical scheme, conveniently control the drainage direction of dewatering box 14, reduced the use limitation of sediment removal device.

Specifically, as shown in fig. 1, the dewatering device further comprises a supporting rod 31 and a handle 32, wherein the left end of the supporting rod 31 is connected with the lower part of the right end of the dewatering box 14, the top end of the supporting rod 31 is rotatably connected with the bottom end of the sludge discharge port 15, and the rear end of the handle 32 is connected with the front end of the sludge discharge port 15.

Through adopting above-mentioned technical scheme, the user can be through pulling handle 32, and handle 32 drives mud discharging port 15 and rotates around the top of branch 31 to the direction of the discharge silt of control mud discharging port 15 has improved the convenience of desilting device, has reduced the use limitation of desilting device.

The working principle is as follows: when a user carries out dredging operation, the user descends the conveying cylinder 2 through the height adjusting device until the mud scraping plate 1 can scrape mud, the user pulls the dredging device to move through the tractor, the mud scraping plate 1 scrapes the mud, the mud enters the conveying cavity through the mud inlet, the conveying motor 6 drives the screw rod 5 to rotate, the screw rod 5 conveys the mud upwards, the mud is discharged from the mud outlet 10, the mud falls into the mud receiving hopper 12 after being discharged, the mud enters the dewatering cavity from the mud receiving hopper 12, the mud falls onto the dewatering mesh 13 after entering the dewatering cavity, the vibrating motor 11 drives the dewatering mesh 13 to vibrate, the dewatering mesh 13 vibrates and dewaters the mud, water leaks from the dewatering mesh 13 and falls on the bottom of the dewatering cavity and is discharged out of the dewatering box 14 through the water outlet 16, the mud enters the mud outlet 15 from the right end of the dewatering box 14 after dewatering, the dewatering box 14 is discharged out, and the manual quantity for dredging can be reduced, the labor intensity of workers is reduced, the labor cost is reduced, the cleaned sludge can be dewatered, the transportation is convenient, and the manpower and material resources are saved.

The utility model discloses the use of conveyer motor 6, vibrating motor 11, dewatering mesh 13, control valve 30 and hob 5 and above-mentioned part that adopts all adopt the utility model provides a background data is given, and cooperate the utility model discloses a description of specification, the affiliated technical field personnel can reach its use to obtain corresponding result of use, so do not have the one-to-one disclosure.

The electric elements that appear here all are connected through transformer and external master controller and 220V commercial power electricity to the master controller can play the conventional known equipment of control for the computer and so on, the utility model provides a product model is only for the use that this technical scheme goes on according to the structural feature of product, and its product can be adjusted and reformed transform after purchasing, makes it match more and accord with the utility model discloses technical scheme belongs to, it is the technical scheme of this technical scheme best application, and the model of its product can be according to the technical parameter of its needs and replace and reform transform, and it is known for technical personnel that belong to in the field, consequently, what technical personnel that belong to in the field can be clear passes through the utility model provides a corresponding result of use.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a channel desilting device for irrigation and water conservancy project which characterized in that: comprises three groups of mud scrapers (1), a conveying cylinder (2), a guide wheel (3), a support frame (4), a screw rod (5), a conveying motor (6), a support frame (7), a height adjusting device, a sludge dewatering device, four groups of support legs (8) and four groups of rollers (9), wherein the lower part of the left end of the conveying cylinder (2) is provided with a mud inlet, the right ends of the three groups of mud scrapers (1) are respectively connected with the front part, the rear part and the lower part of the mud inlet, a conveying cavity is arranged in the conveying cylinder (2), the bottom end of the screw rod (5) can be in conveying connection with the lower wall of the conveying cavity, the top end of the screw rod (5) penetrates through the top end of the conveying cylinder (2) to be connected with the output end of the conveying motor (6), the upper part of the right end of the conveying cylinder (2) is provided with a mud outlet (10), the bottom of the right end of the conveying cylinder (2) is connected with the, the bottom end of the support frame (4) is connected with the guide wheel (3), the conveying cylinder (2) is connected with the support frame (7) through the height adjusting device, the sludge dewatering device comprises a vibration motor (11), a sludge receiving hopper (12), a dewatering screen (13), a dewatering box (14) and a sludge discharge port (15), a dewatering cavity is arranged in the dewatering box (14), the bottom end of the sludge receiving hopper (12) is connected with the left part of the top end of the dewatering box (14), the sludge receiving hopper (12) is positioned below the sludge outlet (10), the sludge receiving hopper (12) is communicated with the dewatering cavity, the left end of the vibration motor (11) is connected with the left wall of the dewatering cavity, the output end of the vibration motor (11) is connected with the left end of the dewatering screen (13), the front end and the rear end of the dewatering screen (13) are respectively connected with the front wall and the rear wall of the dewatering cavity, the left end of the sludge discharge port (15) is connected with the right end of the dewatering box (14), water discharge ports (16) are formed in the lower portion of the front end of the dewatering box (14) and the lower portion of the rear end of the dewatering box (14), the bottom end of the dewatering box (14) is connected with the support (7), four corner position areas of the bottom end of the support (7) are respectively connected with the four groups of the top ends of the supporting legs (8), and the bottom ends of the supporting legs (8) are respectively connected with the four groups of the rollers (9).

2. The channel dredging device for the farmland hydraulic engineering, according to claim 1, characterized in that: the height adjusting device comprises two groups of first hydraulic cylinders (17), a lifting plate (18), a second hydraulic cylinder (19), three groups of limiting rods (20), a lifting sleeve (21) and a connecting plate (22), wherein the top ends and the bottom ends of the three groups of limiting rods (20) are respectively connected with the support (7), the middle area, the front part and the rear part of the lifting plate (18) are respectively sleeved with the three groups of limiting rods (20), the bottom ends of the two groups of first hydraulic cylinders (17) are respectively connected with the support (7), the top ends of the two groups of first hydraulic cylinders (17) are respectively connected with the front part and the rear part of the lifting plate (18), the bottom end of the lifting sleeve (21) is connected with the middle area of the top end of the lifting plate (18), the lifting sleeve (21) is sleeved with the limiting rods (20) in the middle area, and the left end of the lifting sleeve (21) is connected with the right end of the connecting plate (22), the left end of the connecting plate (22) is rotatably connected with the left end of the conveying cylinder (2), one end of the second hydraulic cylinder (19) is rotatably connected with the front half area of the left end of the lifting plate (18), and the other end of the second hydraulic cylinder (19) is rotatably connected with the lower portion of the front end of the connecting plate (22).

3. The channel dredging device for the farmland hydraulic engineering, according to claim 2, characterized in that: a grass blocking fence (23) is arranged at the mud inlet.

4. The channel dredging device for the farmland hydraulic engineering, as claimed in claim 3, characterized in that: the left part, the front part and the rear part of the top end of the dewatering mesh screen (13) are provided with baffles (24).

5. The channel dredging device for the farmland hydraulic engineering, as claimed in claim 4, characterized in that: also comprises a plurality of groups of positioning plates (25), a plurality of groups of positioning columns (26), a plurality of groups of positioning springs (27) and a plurality of groups of positioning nuts (28), the dehydration intracavity is provided with multiunit positioning seat (29), the multiunit the top of locating plate (25) respectively with the front portion and the rear portion of the bottom of dehydration mesh screen (13) are connected, the multiunit the top of reference column (26) respectively with the multiunit the bottom of locating plate (25) is connected, the multiunit the top of positioning spring (27) respectively with the multiunit the bottom of locating plate (25) is connected, the multiunit reference column (26) respectively with the multiunit positioning spring (27) suit, the multiunit the bottom of positioning spring (27) respectively with the multiunit positioning seat (29) is connected, the multiunit the bottom of reference column (26) passes the multiunit respectively positioning seat (29) and respectively with the multiunit set nut (28) suit.

6. The channel dredging device for the farmland hydraulic engineering, as claimed in claim 5, characterized in that: the dewatering mesh screen (13) is in a shape of being high at the left and low at the right.

7. The channel dredging device for the farmland hydraulic engineering, according to claim 6, characterized in that: control valves (30) are arranged at the water outlet (16) of the two groups.

8. The channel dredging device for the farmland hydraulic engineering, according to claim 7, characterized in that: still include branch (31) and handle (32), the left end of branch (31) with the sub-unit connection of the right-hand member of dewatering box (14), the top of branch (31) with the bottom rotatable coupling of mud discharging port (15), the rear end of handle (32) with the front end of mud discharging port (15) is connected.