CN214209671U

CN214209671U - Sludge discharge device for sewage treatment

Info

Publication number: CN214209671U
Application number: CN202120021905.2U
Authority: CN
Inventors: 余伟业; 何显辉; 肖锐华; 何志豪
Original assignee: Guangdong Pengyu Construction Co ltd
Current assignee: Guangdong Pengyu Construction Co ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-09-17
Anticipated expiration: 2031-01-05

Abstract

The application relates to a sludge discharge device for sewage treatment, which comprises a shell, a water delivery pipe and a driving assembly, wherein the water delivery pipe is rotatably connected between two ends of the shell in a penetrating manner; a centrifugal cylinder is rotatably connected between two ends of the shell, the centrifugal cylinder wraps the periphery of the water pipe, a transmission assembly is arranged between the water pipe and the centrifugal cylinder, and a rotation number difference exists between the centrifugal cylinder and the water pipe; the centrifugal cylinder is provided with a plurality of filtering holes, the part of the water delivery pipe in the centrifugal cylinder is provided with a plurality of through holes, and the part of the water delivery pipe in the centrifugal cylinder is fixedly connected with helical blades; the shell is communicated with a water outlet pipe, and one end of the shell is provided with a sludge outlet. This application has the effect that improves sewage sludge discharge efficiency.

Description

Sludge discharge device for sewage treatment

Technical Field

The application relates to the technical field of sewage treatment, in particular to a sludge discharge device for sewage treatment.

Background

The urbanization process of China is in a continuously accelerated stage, the environment pollution condition is aggravated, and the sewage problem becomes a great problem related to the life of people. And the total amount of sewage discharged from most cities is on an increasing trend, and the sewage discharge becomes a new important pollution source.

Most of the existing sewage treatment modes are separation of sewage and sludge by a sedimentation mode. The sewage is led into a sedimentation tank in the treatment process, a flocculating agent is added into the sewage to enable solid particles in the sewage to be settled, then the sewage is led into a biochemical tank to be treated, and the sewage can be discharged after reaching the discharge standard. In the sedimentation process of sewage, the sludge in the sedimentation tank also needs to be cleaned regularly, the existing sewage treatment sludge discharge device mostly uses a sludge pump, after the water in the sedimentation tank is pumped, the sludge in the sedimentation tank is pumped out by the sludge pump for subsequent treatment.

In view of the above-mentioned related technologies, the inventor believes that sewage and sludge are separated by means of sedimentation and then sent to the outside by using a water pump, and this way needs to waste a lot of time to wait for sludge sedimentation, and the sludge discharge efficiency is low, so that improvement is needed.

SUMMERY OF THE UTILITY MODEL

In order to improve the row's mud efficiency of arranging the mud device, this application provides a sewage treatment is with arranging mud device.

The application provides a sludge discharge device for sewage treatment adopts following technical scheme:

a sludge discharge device for sewage treatment comprises a shell, a water delivery pipe and a driving assembly, wherein the water delivery pipe is rotatably connected between two ends of the shell in a penetrating manner; a centrifugal cylinder is rotatably connected between two ends of the shell, the centrifugal cylinder wraps the periphery of the water conveying pipe, a transmission assembly is arranged between the water conveying pipe and the centrifugal cylinder, and a rotation number difference exists between the centrifugal cylinder and the water conveying pipe; the centrifugal cylinder is provided with a plurality of filtering holes, the part of the water delivery pipe, which is positioned in the centrifugal cylinder, is provided with a plurality of through holes, and the part of the water delivery pipe, which is positioned in the centrifugal cylinder, is fixedly connected with helical blades; the shell is communicated with a water outlet pipe, and one end of the shell is provided with a sludge outlet.

By adopting the technical scheme, when sludge contained in sewage needs to be removed, the sewage is guided into the water pipe, the water pipe is driven to rotate by the driving assembly, the sewage enters the centrifugal cylinder from the through hole in the rotating process along with the water pipe, and the water pipe drives the centrifugal cylinder to rotate through the transmission assembly. Because the density of the sludge is greater than that of the water, the sludge is separated from the water in the process that the sewage rotates along with the centrifugal cylinder, and the water flows into a gap between the shell and the centrifugal cavity from the filter hole and is finally discharged from the water outlet pipe; the sludge is left in the centrifugal cylinder, and the peripheral surface of the water pipe is fixedly connected with the helical blade because of the rotation speed difference between the centrifugal cylinder and the water pipe, and the helical blade pushes the sludge left in the centrifugal cylinder out of the sludge outlet in the process of rotating along with the water pipe, thereby completing the separation of the sludge in the sewage. Mud that sewage contains is separated out through adopting centrifugal mode to need not to wait for the mud sediment, save a large amount of time, show the row's of improving sewage mud efficiency.

Preferably, the driving assembly comprises a motor, an output shaft of the motor is fixedly connected with a main belt pulley, one end of the water pipe penetrating out of the shell is fixedly connected with an auxiliary belt pulley in a sleeved mode, and a transmission belt is sleeved between the main belt pulley and the auxiliary belt pulley.

Through adopting above-mentioned technical scheme, through passing through belt pulley transmission with raceway and motor, when the drive raceway rotated, make things convenient for the outer water receiving pipe of raceway.

Preferably, the transmission assembly comprises a main gear fixedly sleeved with the water pipe, the inner side wall of the centrifugal cylinder is opposite to the main gear, an auxiliary gear is fixedly connected to the position of the main gear, one end of the shell is rotatably connected with a fixed rod through a bearing, the fixed rod is parallel to the water pipe, one end, far away from the inner side wall of the shell, of the fixed rod is fixedly connected with a transmission gear, the transmission gear is in meshing transmission with the main gear and the auxiliary gear, and the number of teeth of the main gear is not equal to that of the auxiliary gear.

Through adopting above-mentioned technical scheme, when drive assembly drive raceway rotated, the master gear followed the raceway and rotated, and the dead lever played the supporting role to drive gear, and the master gear rotates and drives drive gear and rotate to drive pinion and centrifuge tube and rotate, because of the number of teeth of master gear and the number of teeth inequality of pinion, it is poor to make to have the number of revolutions between raceway and the centrifuge tube, thereby makes helical blade can get rid of the mud of leaving over in the centrifuge tube.

Preferably, two fixing rings are fixedly connected in the shell, the centrifugal cylinder is rotatably inserted between the two fixing rings, and two ends of the centrifugal cylinder are respectively contacted with the inner side walls at two ends of the shell.

By adopting the technical scheme, the fixing ring plays a supporting role for the centrifugal cylinder, so that the centrifugal cylinder can be suspended in the shell, the two ends of the centrifugal cylinder are respectively contacted with the inner side walls of the two ends of the shell, and the shell plays a limiting role in the rotation of the centrifugal cylinder, so that the shell is kept stable in the rotation process.

Preferably, the centrifugal cylinder comprises an outer cylinder and an inner cylinder, a nylon screen is clamped between the outer cylinder and the inner cylinder, and the outer cylinder and the inner cylinder are fixed through screws.

By adopting the technical scheme, the process requirement and the cost for forming the filtering hole with the small aperture on the centrifugal cylinder are higher, so that the centrifugal cylinder comprises the outer cylinder and the inner cylinder, the nylon screen is clamped between the outer cylinder and the inner pipe, the aperture of the nylon screen is small enough, the filtering effect of sludge can be improved, the nylon screen is low in cost, and the sludge discharge cost can be saved. Meanwhile, the inner cylinder plays a role in protecting the nylon screen, so that the nylon screen is not easily scratched by the helical blades.

Preferably, the shell is provided with a collecting box fixedly connected with one end of the mud outlet, the collecting box is communicated with the centrifugal cylinder, one end of the water delivery pipe penetrates through the mud outlet and is in rotary insertion connection with the collecting box, and the collecting box is communicated with a mud outlet pipe.

Through adopting above-mentioned technical scheme, pass through drive assembly because of the raceway and drive the centrifuge bowl and rotate for mud from mud outlet discharge is in the state of irregular motion, splashes everywhere easily, thereby influences the site operation. Therefore, through the one end fixedly connected with collecting box that opens the mud outlet at the casing, fall into the collecting box earlier from mud outlet exhaust mud, discharge through the mud pipe again, become orderly motion with mud from unordered motion to conveniently collect mud.

Preferably, the circumferential surface of the part of the water conveying pipe, which is positioned in the collecting box, is fixedly connected with a connecting plate, and one side of the connecting plate, which is far away from the water conveying pipe, is provided with a dredging component.

Through adopting above-mentioned technical scheme, because of mud has stronger stickness, consequently, the entry of easy shutoff mud pipe, consequently, be located the partial fixedly connected with connecting plate of collecting box through the raceway, and the one end that the raceway was kept away from to the connecting plate is provided with the mediation subassembly for the connecting plate is along with raceway pivoted in-process, and the mediation subassembly is dredged the entry of mud pipe, makes mud be difficult for piling up in the collecting box.

Preferably, the side of the connecting plate, which is far away from the water pipe, is sunken with a groove, the dredging component comprises a scraper which is in sliding insertion with the groove, an elastic part is fixedly connected between the scraper and the bottom of the groove, the scraper is in sliding butt joint with the inner side wall of the collecting box, and the scraper is in smooth transition with the inlet edge of the mud outlet pipe.

By adopting the technical scheme, when the connecting plate rotates along with the water delivery pipe, the scraper blade is in sliding butt joint with the inner side wall of the collecting box, the elastic piece is in a compressed state, and the scraper blade scrapes off sludge attached to the collecting box; when the scraper blade rotates along with the water pipe and is just opposite to the inlet of the sludge outlet pipe, the scraper blade is inserted into the sludge outlet pipe under the action of the elastic piece, so that the sludge outlet pipe is dredged, and sludge is not easy to accumulate in the collecting box. Meanwhile, the inlet edges of the scraper and the mud outlet pipe are in smooth transition, so that the scraper can continuously rotate along with the water delivery pipe.

In summary, the present application includes at least one of the following beneficial technical effects:

1. sewage enters the water conveying pipe and then enters the centrifugal cylinder from the through hole, the water conveying pipe drives the centrifugal cylinder to rotate through the transmission assembly, sludge and water are separated in the process that the sewage rotates along with the centrifugal cylinder, and the water flows into a gap between the shell and the centrifugal cavity from the filter hole and is finally discharged from the water outlet pipe; because the rotation number difference exists between the water delivery pipe and the centrifugal cylinder, the sludge is pushed out from the sludge outlet under the pushing of the helical blade, thereby completing the separation of the sludge in the sewage; mud contained in the sewage is separated by adopting a centrifugal mode, so that waiting for mud precipitation is not needed, a large amount of time is saved, and the mud discharging efficiency is obviously improved;

2. the fixing ring is arranged in the shell and plays a supporting role on the centrifugal cylinder, so that the centrifugal cylinder can be suspended in the shell, and the shell is kept stable in the rotating process;

3. the collecting box is fixedly connected with one end of the shell, which is provided with the sludge outlet, and the water delivery pipe is provided with the dredging component for dredging the sludge outlet pipe, so that sludge is conveniently collected.

Drawings

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

FIG. 2 is a schematic diagram of the internal structure of the shell and centrifuge bowl of the present application;

FIG. 3 is a schematic structural view of the transmission assembly of the present application;

fig. 4 is an enlarged schematic view of a in fig. 2 in the present application.

Description of reference numerals: 1. a work table; 2. a housing; 3. a water delivery pipe; 4. a drive assembly; 41. a motor; 42. a primary pulley, 43, a secondary pulley; 44. a transmission belt; 5. a water inlet pipe; 6. a rotary joint; 7. a support pillar; 8. clamping a hoop; 9. a centrifugal cylinder; 91. an outer cylinder; 92. an inner barrel; 10. a fixing ring; 11. a connecting rod; 12. a transmission assembly; 121. a main gear; 122. a pinion gear; 123. a transmission gear; 124. fixing the rod; 13. a baffle plate; 14. a through hole; 15. a helical blade; 16. a filtration pore; 17. a nylon screen mesh; 18. a water outlet pipe; 19. a sludge outlet; 20. a collection box; 21. a mud outlet pipe; 22. a connecting plate; 23. a dredging component; 231. a squeegee; 232. a tension spring; 24. and (4) a groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses sludge discharge device for sewage treatment. Referring to fig. 1 and 2, a sludge discharge apparatus for sewage treatment includes a table 1 and a housing 2 installed on an upper surface of the table 1, the housing 2 is cylindrical, and the housing 2 is horizontally disposed. A water pipe 3 coaxially penetrates through the two ends of the shell 2, and the water pipe 3 is rotatably connected with the shell 2 through a bearing. The workbench 1 is provided with a driving component 4 for driving the water delivery pipe 3 to rotate. One end of the water delivery pipe 3 penetrating out of the shell 2 is connected with a water inlet pipe 5, and the water delivery pipe 3 is communicated with the water inlet pipe 5 through a rotary joint 6. The fixed surface is connected with support column 7 on the workstation 1, and rotary joint 6 keeps away from the one end overlap joint of raceway 3 and passes through clamp 8 fixed at the upper surface of support column 7.

Referring to fig. 2, a centrifugal cylinder 9 is further disposed between two ends of the casing 2, the centrifugal cylinder 9 is wrapped on the periphery of the water pipe 3, the diameter of the centrifugal cylinder 9 is larger than that of the water pipe 3, and a centrifugal cavity is formed between the centrifugal cylinder 9 and the water pipe 3. The inside wall of casing 2 is provided with two solid fixed rings 10 along self length direction, and solid fixed ring 10 cup joints the periphery at centrifuge tube 9, many connecting rods 11 of fixedly connected with between the inner peripheral surface of solid fixed ring 10 and casing 2, and centrifuge tube 9 rotates with solid fixed ring 10 to be connected, and centrifuge tube 9's both ends contact with the inside wall of casing 2. A transmission component 12 is arranged between the water pipe 3 and the centrifugal cylinder 9.

The driving component 4 comprises a motor 41 fixed on the upper surface of the workbench 1, an output shaft of the motor 41 is fixedly connected with a main belt pulley 42, a circumferential surface of one end of the water pipe 3 penetrating out of the shell 2 is fixedly sleeved with an auxiliary belt pulley 43, and a transmission belt 44 is sleeved between the main belt pulley 42 and the auxiliary belt pulley 43.

Referring to fig. 2 and 3, the transmission assembly 12 includes a main gear 121, the main gear 121 is sleeved and fixed on one end of the water pipe 3 close to the secondary pulley 43, and the main gear 121 is located in the centrifugal cylinder 9. A ring of pinion 122 is fixedly connected to the inner circumferential surface of the centrifuge bowl 9 opposite to the main gear 121, a fixing rod 124 is rotatably inserted into the inner side wall of one end of the casing 2 close to the secondary pulley 43, and the fixing rod 124 is rotatably connected to the casing 2 through a bearing. The fixing rod 124 is parallel to the water pipe 3, one end of the fixing rod 124 far away from the inner side wall of the housing 2 is fixedly connected with a transmission gear 123, the transmission gear 123 is positioned between the main gear 121 and the pinion 122, and the transmission gear 123 is in meshing transmission with the main gear 121 and the pinion 122. The number of teeth of the main gear 121 is smaller than that of the pinion 122, so that there is a difference in the number of revolutions between the water duct 3 and the centrifugal cylinder 9.

The circumferential surface of one end of the water pipe 3 close to the main gear 121 is also fixedly connected with a baffle 13, the baffle 13 extends to the inner circumferential surface close to the centrifugal cylinder 9 along the radial direction of the water pipe 3, and the transmission assembly 12 is located between the baffle 13 and the inner side wall of the shell 2. The baffle 13 isolates the transmission assembly 12 from the centrifugal cavity, so that the sewage is not easy to contact with the transmission assembly 12, and the transmission of the transmission assembly 12 is kept smooth.

Referring to fig. 2 and 3, the circumferential surface of the part of the water pipe 3 located in the centrifuge bowl 9 is provided with a plurality of through holes 14, the circumferential surface of the part of the water pipe 3 located in the centrifuge bowl 9 is welded and fixed with helical blades 15, and the helical blades 15 are connected with the inner circumferential surface of the centrifuge bowl 9 in a sliding manner. The centrifugal cylinder 9 is provided with a plurality of groups of filter holes 16 distributed circumferentially along the length direction thereof. The centrifugal cylinder 9 comprises an outer cylinder 91 and an inner cylinder 92, a nylon screen 17 is clamped between the outer cylinder 91 and the inner cylinder 92, and the outer cylinder 91 and the inner cylinder 92 are fixedly connected through screws.

Referring to fig. 2, a water outlet pipe 18 is communicated with a cavity between the housing 2 and the centrifuge bowl 9, a sludge outlet 19 is formed at one end of the housing 2 far away from the transmission assembly 12, and the sludge outlet 19 is communicated with the centrifuge bowl 9. A collecting box 20 is further welded and fixed at one end of the centrifugal cylinder 9 with the opening mud outlet 19, the collecting box 20 is communicated with the centrifugal cylinder 9 through the mud outlet 19, and a mud outlet pipe 21 is communicated with one side of the collecting box 20 adjacent to the workbench 1. The collecting box 20 plays a role in collecting sludge, and the sludge discharged from the sludge outlet 19 is not easy to splash around along with the rotation of the centrifugal cylinder 9, so that the sludge can be conveniently collected on the construction site.

The collecting box 20 is cylindrical, and one end of the water delivery pipe 3, which is far away from the motor 41, penetrates through the sludge outlet 19 and is rotatably connected with the collecting box 20 through a bearing. One end of the water conveying pipe 3 close to the collecting box 20 is solid, so that all sewage can be deslimed in the centrifugal cavity.

Referring to fig. 2 and 4, a connection plate 22 is fixedly connected to a circumferential surface of one end of the water pipe 3 inserted into the collection box 20, and the connection plate 22 is extended along a radial direction of the water pipe 3. The side of the connecting plate 22 far away from the water pipe 3 is provided with a dredging component 23. The side opening recess 24 of one side that the connecting plate 22 kept away from raceway 3, mediation subassembly 23 includes the scraper blade 231 with recess 24 slip grafting, the scraper blade 231 keeps away from the sliding butt of one side of connecting plate 22 and the inner peripheral surface of collecting box 20, the connecting plate 22 and the smooth transition of the feed end edge of mud pipe 21. An elastic member is fixedly connected before the scraping plate 231 is inserted into one side of the groove 24 and the bottom of the groove 24, and the elastic member is a telescopic spring 232. When the scraper 231 abuts against the inner peripheral surface of the catch tank 20, the extension spring 232 is in a compressed state. When the scraping plate 231 rotates to be opposite to the mud discharging pipe 21, the scraping plate 231 is inserted into the mud discharging pipe 21 under the pushing of the telescopic spring 232, so that the mud discharging pipe 21 is dredged, and the mud discharging pipe 21 is not easy to be blocked.

The implementation principle of a sludge discharge device for sewage treatment in the embodiment of the application is as follows:

the sewage is guided into the water delivery pipe 3 from the water inlet pipe 5, the sewage flows into the shell 2 through the water delivery pipe 3, the water delivery pipe 3 is driven to rotate by the starting motor 41, and the sewage is thrown out of the through hole 14 into the centrifugal cavity in the rotating process of the water delivery pipe 3.

When the water pipe 3 rotates, the main gear 121 rotates, and the main gear 121 drives the pinion 122 to rotate through the transmission gear 123, so as to drive the centrifugal cylinder 9 to rotate. Because the density of the silt is greater than that of the water, in the process that the sewage rotates along with the centrifugal cylinder 9, the water is retained to a cavity between the shell 2 and the centrifugal cavity from a gap of the nylon screen 17 and then flows out from the water outlet pipe 18.

The sludge is attached to the inner side wall of the inner cylinder 92 under the filtering action of the nylon screen 17, and the number of teeth of the main gear 121 is smaller than that of the pinion 122, so that the rotating speed of the water delivery pipe 3 is greater than that of the centrifugal cylinder 9, the sludge left in the inner cylinder 92 is pushed to the sludge discharge port by the helical blades 15 in the rotating process along with the water delivery pipe 3, and the sludge falls into the collecting box 20 from the sludge discharge port and is finally discharged from the sludge outlet pipe 21. Mud that sewage contains is separated out through adopting centrifugal mode to need not to wait for the mud sediment, save a large amount of time, show and improve row mud efficiency.

The raceway 3 still drives connecting plate 22 at the rotation in-process and rotates, thereby connecting plate 22 rotates and drives scraper blade 231 and rotate, and scraper blade 231 will be attached to the mud on the 20 inside walls of collecting box and scrape down, and when connecting plate 22 rotated to just when going out mud pipe 21, connecting plate 22 dredged out mud pipe 21 under expanding spring 232's promotion, and the convenience is discharged the mud of arranging.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a sewage treatment is with arranging mud device which characterized in that: the device comprises a shell (2), a water delivery pipe (3) is rotatably connected between two ends of the shell (2) in a penetrating manner, and the device also comprises a driving component (4) for driving the water delivery pipe (3) to rotate; a centrifugal cylinder (9) is rotatably connected between two ends of the shell (2), the centrifugal cylinder (9) wraps the periphery of the water conveying pipe (3), a transmission assembly (12) is arranged between the water conveying pipe (3) and the centrifugal cylinder (9), and a rotation number difference exists between the centrifugal cylinder (9) and the water conveying pipe (3); the centrifugal cylinder (9) is provided with a plurality of filtering holes (16), the part of the water conveying pipe (3) positioned in the centrifugal cylinder (9) is provided with a plurality of through holes (14), and the part of the water conveying pipe (3) positioned in the centrifugal cylinder (9) is fixedly connected with a helical blade (15); the shell (2) is communicated with a water outlet pipe (18), and one end of the shell (2) is provided with a sludge outlet (19).

2. The sludge discharging device for sewage treatment as claimed in claim 1, wherein: the driving assembly (4) comprises a motor (41), an output shaft of the motor (41) is fixedly connected with a main belt pulley (42), the water conveying pipe (3) penetrates out of one end of the shell (2) and is fixedly sleeved with an auxiliary belt pulley (43), and a transmission belt (44) is sleeved between the main belt pulley (42) and the auxiliary belt pulley (43).

3. The sludge discharging device for sewage treatment as claimed in claim 1, wherein: the transmission assembly (12) comprises a main gear (121) fixedly connected with the water pipe (3) in a sleeved mode, the inner side wall of the centrifugal cylinder (9) is right opposite to the auxiliary gear (122) fixedly connected with the position of the main gear (121), one end of the shell (2) is rotatably connected with a fixing rod (124) through a bearing, the fixing rod (124) is parallel to the water pipe (3), one end, far away from the inner side wall of the shell (2), of the fixing rod (124) is fixedly connected with a transmission gear (123), the transmission gear (123) is in meshed transmission with the main gear (121) and the auxiliary gear (122), and the number of teeth of the main gear (121) is not equal to that of the auxiliary gear (122).

4. The sludge discharging device for sewage treatment as claimed in claim 1, wherein: two fixing rings (10) are fixedly connected in the shell (2), the centrifugal cylinder (9) is rotatably inserted between the two fixing rings (10), and two ends of the centrifugal cylinder (9) are respectively contacted with the inner side walls of two ends of the shell (2).

5. The sludge discharging device for sewage treatment as claimed in claim 4, wherein: the centrifugal cylinder (9) comprises an outer cylinder (91) and an inner cylinder (92), a nylon screen mesh (17) is clamped between the outer cylinder (91) and the inner cylinder (92), and the outer cylinder (91) and the inner cylinder (92) are fixed through screws.

6. The sludge discharging device for sewage treatment as claimed in claim 1, wherein: the centrifugal pump is characterized in that a collecting box (20) is fixedly connected to one end, provided with a sludge outlet (19), of the shell (2), the collecting box (20) is communicated with the centrifugal cylinder (9), one end of the water conveying pipe (3) penetrates through the sludge outlet (19) and is rotatably connected with the collecting box (20) in an inserting mode, and a sludge outlet pipe (21) is communicated with the collecting box (20).

7. The sludge discharging device for sewage treatment as claimed in claim 6, wherein: the periphery of the part of the water delivery pipe (3) located in the collection box (20) is fixedly connected with a connecting plate (22), and one side, far away from the water delivery pipe (3), of the connecting plate (22) is provided with a dredging assembly (23).

8. The sludge discharging device for sewage treatment as claimed in claim 7, wherein: the side edge of the connecting plate (22) far away from the water conveying pipe (3) is sunken with a groove (24), the dredging component (23) comprises a scraping plate (231) which is in sliding insertion connection with the groove (24), an elastic piece is fixedly connected between the scraping plate (231) and the groove bottom of the groove (24), the scraping plate (231) is in sliding butt joint with the inner side wall of the collecting box (20), and the scraping plate (231) and the inlet edge of the mud outlet pipe (21) are in smooth transition.