CN115262674B

CN115262674B - Dredging device for treating black and odorous river

Info

Publication number: CN115262674B
Application number: CN202210557998.XA
Authority: CN
Inventors: 吴国辉; 杨铭秋; 李原; 王长昊; 罗韬; 刘沙; 熊振远
Original assignee: Cccc Guanghang Green Construction Co ltd; CCCC Guangzhou Dredging Co Ltd.
Current assignee: Cccc Guanghang Green Construction Co ltd; CCCC Guangzhou Dredging Co Ltd.
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2023-06-16
Anticipated expiration: 2042-05-19
Also published as: CN115262674A

Abstract

The invention discloses a dredging device for treating black and odorous river surge, and belongs to the technical field of water treatment. The utility model provides a black and odorous river is dredged device for surge management, including setting firmly mounting bracket and the mud case on the hull, be connected with the silt pipe of taking out through the round pin axle rotation on the mounting bracket, take out the end connection of silt pipe has the desilting sucking disc, the one end that the desilting sucking disc was kept away from to the silt pipe is connected with the recovery pipe, be provided with purifying fluid interpolation mechanism on the recovery pipe, be connected with the screwed hose on the recovery pipe, the one end that the screwed hose kept away from the recovery pipe is connected with the drain pipe, the drain pipe links to each other with the mud case, the mud case includes first box and second box, all seted up the feed inlet with the drain pipe intercommunication on first box and the second box, be provided with alternate feed mechanism between two feed inlets; the invention can reduce the malodor of the sludge, improve the working environment of dredging, simultaneously can automatically discharge the purified clear water in time, is convenient for the subsequent treatment of the sludge, and remarkably improves the practicability of dredging.

Description

Dredging device for treating black and odorous river

Technical Field

The invention relates to the technical field of water treatment, in particular to a dredging device for treating black and odorous river surge.

Background

River dredging generally refers to river treatment, and belongs to hydraulic engineering, and sludge at the bottom of a deposited river is blown and stirred into turbid water through mechanical equipment and flows away along with river water, so that a dredging effect is achieved, the normal play of various functions such as flood control, drainage, irrigation, water supply, navigation and the like is increasingly affected by river sedimentation, the normal function of the river is recovered, the rapid sustainable development of economy and society is promoted, and river dredging engineering is carried out, so that the river is deepened and widened through treatment, the river is cleared, the production conditions and living environment of masses are obviously improved, and the aims of 'water clearing, river smoothness, green shore and beautiful scene' are achieved.

Along with the development of science and technology, the variety of river channel ecological restoration dredging devices for hydraulic engineering is more and more, and the demand for the river channel ecological restoration dredging devices for hydraulic engineering is higher and more. The river ecological restoration dredging device for the hydraulic engineering used at present has some defects. Although the sludge in the river channel can be removed, the sewage is doped in the sludge, the pumped sludge mixture can not timely discharge the water in the sludge mixture, so that the sludge can not only emit malodor and pollute the working environment, but also is unfavorable for the subsequent sludge treatment, so that the dredging efficiency is low, and the treatment cost is increased.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a dredging device for treating black and odorous river.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides a black and odorous river is dredged device with dredging, includes mounting bracket and mud case that sets firmly on the hull, be connected with the silt pipe of taking out through the round pin axle rotation on the mounting bracket, the end connection who takes out the silt pipe has the desilting sucking disc, the one end that the desilting sucking disc was kept away from to the silt pipe is connected with the recovery pipe, be provided with purifying liquid adding mechanism on the recovery pipe, be connected with the screwed hose on the recovery pipe, the one end that the recovery pipe was kept away from to the screwed hose is connected with the drain pipe, the drain pipe links to each other with the mud case, the mud case includes first box and second box, all seted up the feed inlet that communicates each other with the drain pipe on first box and the second box, two be provided with alternate feed mechanism between the feed inlet, still be provided with the automatic clear water emission subassembly of the same structure on first box and the second box, be provided with pneumatic assembly between alternate feed mechanism and the automatic emission subassembly.

Preferably, the alternate feeding mechanism comprises a first feeding assembly for feeding the first box body and a second feeding assembly for feeding the second box body, the first feeding assembly comprises a movable groove formed between the first box body and the second box body, the inner wall of the movable groove is rotationally connected with a rotating rod, the outer wall of the rotating rod is fixedly provided with a movable gear, two sides of the outer wall of the movable gear are respectively connected with a first rack and a second rack in a meshed manner, the first racks and the second racks are both slidingly connected in the movable groove, a first floating block and a second floating block are respectively and movably arranged in the two feeding inlets, an elastic telescopic rod is arranged between the first floating block and the second floating block and the inner wall of the bottom of the sludge box respectively, the first racks are movably abutted against the first floating block, and a second groove matched with the second rack is formed in the second floating block.

Preferably, one end of the first rack, which is far away from the movable gear, is provided with a first inclined plane, the first inclined plane is movably abutted against the first floating block, the lower side of one end of the second rack, which is far away from the movable gear, is provided with a second inclined plane, and the second inclined plane is movably abutted against the second floating block.

Preferably, the second feeding assembly comprises a first cavity arranged in the second box body, a first plug plate is slidably connected to the inner wall of the first cavity, a first elastic element is arranged between the first plug plate and the inner wall of the first cavity, one end, far away from the first elastic element, of the first plug plate is connected with a moving block, and the moving block is movably abutted to the second floating block.

Preferably, the second feeding assembly further comprises a second cavity formed in the first box body, an air guide groove used for connecting the first cavity with the second cavity is formed in the sludge box body, a second plug plate is slidably connected to the inner wall of the second cavity, a second elastic element is arranged between the second plug plate and the inner wall of the second cavity, an inserting block is connected to one end, far away from the second elastic element, of the second plug plate, and a first groove matched with the inserting block is formed in the first floating block.

Preferably, the clear water automatic discharging assembly comprises a working groove formed in the first box body, telescopic plates are connected to the inner walls of the upper side and the lower side of the working groove, a third floating block is arranged between the two telescopic plates, and a water outlet is formed in the third floating block.

Preferably, the pneumatic assembly comprises a third cavity arranged on a third floating block, a baffle plate used for blocking the water outlet is slidably connected to the inner wall of the third cavity, a third elastic element is arranged between the baffle plate and the inner wall of the third cavity, one end, far away from the third elastic element, of the baffle plate is connected with a telescopic pipe, the pneumatic assembly further comprises a fourth cavity arranged in a sludge tank, an air duct is arranged between the telescopic pipe and the fourth cavity, a fourth elastic element is connected to the inner wall of the fourth cavity, one end, far away from the inner wall of the fourth cavity, of the fourth elastic element is connected with a piston block, and the piston block is movably offset with the first floating block.

Preferably, the purifying liquid adding mechanism comprises a driving assembly and an adding assembly, the driving assembly comprises a rotating rod which is rotationally connected in the recovery pipe, blades which are circumferentially distributed are arranged on the outer wall of the rotating rod, a cam is further fixedly arranged on the rotating rod, and the driving assembly further comprises a guide plate which is arranged on the inner wall of the recovery pipe.

Preferably, the adding component comprises a shell fixedly connected with the recovery pipe through a connecting plate, a liquid storage cavity and a working cavity are formed in the shell through a partition plate, a first one-way valve is arranged between the working cavity and the liquid storage cavity, a movable piston is slidably connected to the inner wall of the working cavity, a fifth elastic element is arranged between the movable piston and the bottom wall of the working cavity, a movable rod is further connected to the movable piston, one end of the movable rod, far away from the movable piston, penetrates through the shell and is connected with a stress plate, the stress plate is abutted against the cam in a movable mode, and a liquid guide pipe is further connected to the working cavity through a second one-way valve and is connected with the recovery pipe.

Preferably, the inner wall of the recovery pipe is connected with a supporting plate, a rotating shaft is rotationally connected with the supporting plate, stirring blades which are uniformly distributed are arranged on the rotating shaft, an auxiliary bevel gear is arranged on the rotating shaft, and a main bevel gear which is meshed and connected with the auxiliary bevel gear is arranged on the rotating rod.

Compared with the prior art, the invention provides a dredging device for treating black and odorous river surge, which has the following beneficial effects:

1. this black and odorous river is dredged device with dredging in surging management mixes purifying liquid and silt through purifying liquid adding mechanism, can reduce the foul smell of silt, improves the operational environment of dredging, simultaneously through the cooperation of alternate feed mechanism and clear water automatic discharge subassembly, can in time automatic discharge with clear water after purifying, be convenient for to silt follow-up treatment, show the practicality that improves the dredging.

2. This black and odorous river is dredged device with dredging in a rush is administered, work through alternate feed mechanism makes first box and second box collect silt feeding in turn, when first box feeding, the feed inlet of second box seals and discharges the clear water through clear water automatic discharge subassembly, when second box feeding, the feed inlet of first box seals and discharges the clear water through clear water automatic discharge subassembly, makes the clear water that obtains the purification in the silt in time discharge, reduces follow-up work load, and then improves dredging efficiency.

3. According to the dredging device for treating the black and odorous river, the purifying liquid is intermittently discharged through intermittent offset of the cam and the stress plate, so that the purifying liquid is conveniently saved, and the dredging cost is reduced.

4. According to the dredging device for treating the black and odorous river, the main bevel gear on the rotating rod is meshed with the auxiliary bevel gear on the rotating shaft, so that the auxiliary bevel gear drives the rotating shaft and the stirring blades on the outer side of the rotating shaft to stir and mix the purifying liquid and the sludge, and the sludge and the purifying liquid are uniformly mixed, so that water in the sludge is purified.

Drawings

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

FIG. 2 is a schematic cross-sectional view of a recovery pipe according to the present invention;

FIG. 3 is an enlarged schematic view of part A of FIG. 2 in accordance with the present invention;

fig. 4 is a schematic cross-sectional structure of the sludge tank of the present invention;

FIG. 5 is an enlarged schematic view of part B of FIG. 4 in accordance with the present invention;

FIG. 6 is an enlarged schematic view of part C of FIG. 4 in accordance with the present invention;

FIG. 7 is a schematic cross-sectional view of a third floating block according to the present invention;

FIG. 8 is a schematic cross-sectional view of the housing of the present invention;

fig. 9 is a schematic view of the external structure of the movable gear of the present invention.

In the figure: 1. a mounting frame; 2. a sludge tank; 201. a first case; 202. a second case; 3. a silt suction pipe; 4. a dredging sucker; 5. a recovery pipe; 6. a threaded hose; 7. a discharge pipe; 8. a feed inlet; 9. a movable groove; 901. a rotating rod; 902. a movable gear; 903. a first rack; 904. a second rack; 10. an elastic telescopic rod; 11. a first floating block; 111. a first groove; 12. a second floating block; 121. a second groove; 13. a first cavity; 131. a first plug plate; 132. a moving block; 14. a second cavity; 141. a second plug plate; 142. inserting blocks; 15. an air guide groove; 16. a working groove; 161. a telescoping plate; 17. a third floating block; 171. a water outlet; 18. a third cavity; 181. a baffle; 182. a telescopic tube; 19. a fourth cavity; 191. a piston block; 20. a deflector; 21. a rotating lever; 211. a blade; 212. a cam; 213. a main bevel gear; 22. a housing; 221. a liquid storage cavity; 222. a working chamber; 23. moving the piston; 231. a moving rod; 232. a force-bearing plate; 233. a catheter; 24. a support plate; 241. a rotating shaft; 242. stirring the leaves; 243. and a secondary bevel gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.

In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be the communication between the two elements; the specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Examples:

referring to fig. 1, fig. 2 and fig. 4, a dredging device for treating black and odorous river surge comprises a mounting frame 1 and a sludge box 2 which are fixedly arranged on a ship body, wherein a dredging pipe 3 is connected to the mounting frame 1 through a pin shaft in a rotating mode, a dredging sucker 4 is connected to the end portion of the dredging pipe 3, one end, far away from the dredging sucker 4, of the dredging pipe 3 is connected with a recovery pipe 5, a purifying liquid adding mechanism is arranged on the recovery pipe 5, a threaded hose 6 is connected to the recovery pipe 5, one end, far away from the recovery pipe 5, of the threaded hose 6 is connected with a discharge pipe 7, the discharge pipe 7 is connected with the sludge box 2, the sludge box 2 comprises a first box 201 and a second box 202, feed inlets 8 which are mutually communicated with the discharge pipe 7 are formed in the first box 201 and the second box 202, an alternate feed mechanism is arranged between the two feed inlets 8, an automatic clear water discharging assembly with the same structure is further arranged on the first box 201 and the second box 202, and a pneumatic assembly is arranged between the alternate feed mechanism and the automatic clear water discharging assembly.

Specifically, set up taking out silt pipe 3 on the hull through mounting bracket 1, can rotate taking out silt pipe 3, and then adjust taking out silt angle of taking out silt pipe 3, take out silt to the river bottom through desilting sucking disc 4, the silt of extraction is along taking out silt pipe 3, retrieve pipe 5, screw thread hose 6 and discharge tube 7 get into in the mud case 2, mix purifying liquid and silt through purifying liquid adding mechanism in the silt transportation process, can reduce the foul of silt, improve the operational environment of desilting, cooperate with clear water automatic discharge subassembly through alternate feed mechanism simultaneously, can in time automatic discharge with the clear water after the purification, be convenient for handle the silt later stage, show the practicality that improves the desilting.

Referring to fig. 1, fig. 4, fig. 5, fig. 6, fig. 7 and fig. 9, as a preferred technical scheme of the present invention, the alternate feeding mechanism comprises a first feeding component for feeding a first box 201 and a second feeding component for feeding a second box 202, the first feeding component comprises a movable groove 9 arranged between the first box 201 and the second box 202, the inner wall of the movable groove 9 is rotatably connected with a rotating rod 901, the outer wall of the rotating rod 901 is fixedly provided with a movable gear 902, two sides of the outer wall of the movable gear 902 are respectively connected with a first rack 903 and a second rack 904 in a meshed manner, the first rack 903 and the second rack 904 are respectively connected in the movable groove 9 in a sliding manner, a first floating block 11 and a second floating block 12 are respectively movably arranged in the two feeding openings 8, an elastic telescopic rod 10 is respectively arranged between the first floating block 11 and the second floating block 12 and the inner wall at the bottom of the sludge box 2, the first rack 903 is movably abutted against the first floating block 11, and a second groove 121 matched with the second rack 904 is arranged on the second floating block 12.

Further, a first inclined plane is disposed at one end of the first rack 903 far away from the movable gear 902, the first inclined plane is movably abutted against the first floating block 11, a second inclined plane is disposed at the lower side of one end of the second rack 904 far away from the movable gear 902, and the second inclined plane is movably abutted against the second floating block 12.

Further, the second feeding assembly comprises a first cavity 13 arranged in the second box 202, the inner wall of the first cavity 13 is slidably connected with a first plug plate 131, a first elastic element is arranged between the first plug plate 131 and the inner wall of the first cavity 13, one end, far away from the first elastic element, of the first plug plate 131 is connected with a moving block 132, and the moving block 132 is movably abutted against the second floating block 12.

Further, the second feeding assembly further comprises a second cavity 14 arranged in the first box 201, an air guide groove 15 used for connecting the first cavity 13 and the second cavity 14 is arranged in the sludge box 2, a second plug plate 141 is slidably connected to the inner wall of the second cavity 14, a second elastic element is arranged between the second plug plate 141 and the inner wall of the second cavity 14, one end, far away from the second elastic element, of the second plug plate 141 is connected with an inserting block 142, and a first groove 111 matched with the inserting block 142 is formed in the first floating block 11.

Further, the automatic clear water discharging assembly comprises a working groove 16 formed in the first box 201, telescopic plates 161 are connected to the inner walls of the upper side and the lower side of the working groove 16, a third floating block 17 is arranged between the two telescopic plates 161, and a water outlet 171 is formed in the third floating block 17.

Further, the pneumatic assembly comprises a third cavity 18 arranged on the third floating block 17, a baffle 181 for blocking the water outlet 171 is slidably connected to the inner wall of the third cavity 18, a third elastic element is arranged between the baffle 181 and the inner wall of the third cavity 18, one end, far away from the third elastic element, of the baffle 181 is connected with a telescopic pipe 182, the pneumatic assembly further comprises a fourth cavity 19 arranged in the sludge tank 2, an air duct is arranged between the telescopic pipe 182 and the fourth cavity 19, the inner wall of the fourth cavity 19 is connected with a fourth elastic element, one end, far away from the inner wall of the fourth cavity 19, of the fourth elastic element is connected with a piston block 191, and the piston block 191 is movably abutted against the first floating block 11.

Specifically, when dredging is initiated, the first tank 201 and the second tank 202 are not all floated under the action of sewage, at this time, the second floating block 12 is placed at the feed inlet 8 of the second tank 202 and is limited by the second rack 904, the first floating block 11 in the first tank 201 is placed in the tank, when the sludge is conveyed to the sludge tank 2, the sludge firstly enters the first tank 201 which is not blocked, along with the continuous entering of the sludge into the first tank 201, the first floating block 11 and the third floating block 17 float up under the action of sewage until the first floating block 11 enters the feed inlet 8 of the first tank 201, the first tank 201 is blocked, at this time, the first floating block 142 limits the first floating block 11, in the process, the first rack 903 is forced to move and is meshed with the second rack 904 on the other side, the second tank 201 moves to the first tank 201, the second floating block 12 is not forced to move under the action of the second floating block 12, the second floating block 12 is not forced to move down in the second tank 12, the second tank 14 is not forced to move to the second tank 14, the second floating block 12 is forced to move to the second tank 14, the second tank 14 is stopped, the second tank 14 is forced to move the second floating block 12 is not forced to move, and the second tank 14 is forced to move the second tank 14 is forced to be blocked, and the second tank 14 is forced to move the second block 12 is forced to move, and the second floating block 12 is forced to move the second block 12 is forced to move to the second rack to the other side is pushed to move, and is pushed to move to the second rack to move to the side; when the sludge is poured into the second box 202, the sludge and sewage stored in the first box 201 are kept still and layered under the action of the purifying liquid, the sludge is sunk, clear water is placed at the upper end, when the first floating block 11 is used for plugging the feed inlet 8, the first floating block 11 presses the piston block 191, the piston block 191 pushes gas in the fourth cavity 19 and enters the telescopic pipe 182 through the gas guide pipe, the telescopic pipe 182 is stretched and drives the baffle 181 to move downwards, so that the baffle 181 no longer plugs the water outlet 171, clear water purified at the upper side of the first box 201 is discharged from the water outlet 171, the water outlet 171 moves along with the third floating block 17, and the third floating block 17 descends along with the descending of the water level, so that clear water in the first box 201 can be effectively discharged until the clear water is flush with the sludge; when the second tank 202 is full of sludge and the first tank 201 is refilled with sludge, at this time, the first tank 201 is provided with a space for storing sludge again, the first floating block 11 is not limited by the insert block 142 and moves downwards under the action of the elastic telescopic rod 10, the first floating block 11 does not squeeze the piston block 191 any more, the baffle 181 on the third floating block 17 blocks the water outlet 171 again, so that the sludge is prevented from being directly discharged from the water outlet 171 when the sludge is filled, and when the first tank 201 stores the sludge, the second tank 202 repeats the step of discharging clear water outwards by the first tank 201, so as to prepare for continuously storing the sludge for the second tank 202.

Referring to fig. 1, 2, 3 and 8, as a preferred technical scheme of the present invention, the purifying liquid adding mechanism includes a driving assembly and an adding assembly, the driving assembly includes a rotating rod 21 rotatably connected in the recovery pipe 5, blades 211 circumferentially distributed are disposed on the outer wall of the rotating rod 21, a cam 212 is fixedly disposed on the rotating rod 21, and the driving assembly further includes a deflector 20 disposed on the inner wall of the recovery pipe 5.

Further, the adding component comprises a shell 22 fixedly connected with the recovery pipe 5 through a connecting plate, the interior of the shell 22 is divided into a liquid storage cavity 221 and a working cavity 222 through a partition plate, a first one-way valve is arranged between the working cavity 222 and the liquid storage cavity 221, a movable piston 23 is slidably connected to the inner wall of the working cavity 222, a fifth elastic element is arranged between the movable piston 23 and the bottom wall of the working cavity 222, a movable rod 231 is further connected to the movable piston 23, one end, far away from the movable piston 23, of the movable rod 231 penetrates through the shell 22 and is connected with a force-bearing plate 232, the force-bearing plate 232 is movably abutted against the cam 212, the working cavity 222 is further connected with a liquid guide tube 233 through a second one-way valve, and the liquid guide tube 233 is connected with the recovery pipe 5.

Specifically, when the sludge is discharged and conveyed to the recovery pipe 5, the sludge acts on the blades 211 under the action of the guide plate 20, so that the blades 211 drive the rotating rod 21 to rotate, the rotating rod 21 drives the cam 212 to rotate during rotation, the cam 212 intermittently offsets the stress plate 232, when the cam 212 offsets the stress plate 232, the stress plate 232 drives the movable piston 23 to move downwards in the working cavity 222 through the moving rod 231, when the cam 212 does not offset the stress plate 232, the movable piston 23 moves upwards under the action of the fifth elastic element, the movable piston 23 moves up and down in the working cavity 222 in a reciprocating manner, when the movable piston 23 moves upwards, the working cavity 222 extracts the purified liquid in the liquid storage cavity 221, the purified liquid can be polyaluminum and amide, so that sludge flocs, sewage becomes clear and mud are separated, and when the movable piston 23 moves downwards, the extracted purified liquid is discharged into the recovery pipe 5 through the liquid guide tube 233, the purified liquid is mixed with the sludge, water in the sludge is purified and separated, and meanwhile the purified liquid is intermittently discharged, the purified liquid is conveniently used, and the mud is cleaned, and the mud cleaning cost is reduced.

Referring to fig. 1, 2, 3 and 8, as a preferred embodiment of the present invention, a support plate 24 is connected to the inner wall of the recovery pipe 5, a rotation shaft 241 is rotatably connected to the support plate 24, stirring blades 242 uniformly distributed are provided on the rotation shaft 241, a sub bevel gear 243 is provided on the rotation shaft 241, and a main bevel gear 213 engaged with the sub bevel gear 243 is provided on the rotation rod 21; specifically, the main bevel gear 213 on the rotating rod 21 is meshed with the auxiliary bevel gear 243 on the rotating shaft 241, so that the auxiliary bevel gear 243 drives the rotating shaft 241 and the stirring blades 242 on the outer side of the rotating shaft to stir and mix the purified liquid and the sludge, so that the sludge and the purified liquid are uniformly mixed, and the mixing uniformity of the sludge and the purified liquid is improved.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims

1. The dredging device for the black and odorous river surge treatment comprises a mounting frame (1) and a sludge box (2) which are fixedly arranged on a ship body, and is characterized in that the mounting frame (1) is rotationally connected with a dredging pipe (3) through a pin shaft, the end part of the dredging pipe (3) is connected with a dredging sucker (4), one end of the dredging pipe (3) away from the dredging sucker (4) is connected with a recovery pipe (5), a purified liquid adding mechanism is arranged on the recovery pipe (5), a threaded hose (6) is connected to the recovery pipe (5), one end of the threaded hose (6) away from the recovery pipe (5) is connected with a discharge pipe (7), the discharge pipe (7) is connected with the sludge box (2), the sludge box (2) comprises a first box body (201) and a second box body (202), feed inlets (8) which are mutually communicated with the discharge pipe (7) are respectively arranged on the first box body (201) and the second box body (202), an automatic feed mechanism is alternately arranged between the two feed inlets (8), and an automatic feed mechanism is alternately arranged between the first box body and the second box body (201) and the automatic feed mechanism, and the automatic feed mechanism is also provided with a clean water discharging component;

the alternating feeding mechanism comprises a first feeding component for feeding a first box body (201) and a second feeding component for feeding a second box body (202), the first feeding component comprises a movable groove (9) formed between the first box body (201) and the second box body (202), a rotating rod (901) is rotatably connected to the inner wall of the movable groove (9), a movable gear (902) is fixedly arranged on the outer wall of the rotating rod (901), a first rack (903) and a second rack (904) are respectively connected to the two sides of the outer wall of the movable gear (902) in a meshed mode, the first rack (903) and the second rack (904) are both connected in the movable groove (9) in a sliding mode, a first floating block (11) and a second floating block (12) are respectively and movably arranged in the two feeding ports (8), an elastic telescopic rod (10) is arranged between the first floating block (11) and the second floating block (12) and the inner wall of the bottom of the sludge box (2), and the first rack (903) and the first floating block (903) are respectively in a matched mode, and the second rack (904) are arranged on the second rack (121);

a first inclined plane is arranged at one end, far away from the movable gear (902), of the first rack (903), the first inclined plane is movably propped against the first floating block (11), a second inclined plane is arranged at the lower side of one end, far away from the movable gear (902), of the second rack (904), and the second inclined plane is movably propped against the second floating block (12);

the second feeding assembly comprises a first cavity (13) arranged in a second box body (202), a first plug plate (131) is connected to the inner wall of the first cavity (13) in a sliding mode, a first elastic element is arranged between the first plug plate (131) and the inner wall of the first cavity (13), one end, far away from the first elastic element, of the first plug plate (131) is connected with a moving block (132), and the moving block (132) is in movable propping against the second floating block (12);

the second feeding assembly further comprises a second cavity (14) formed in the first box body (201), an air guide groove (15) used for connecting the first cavity (13) and the second cavity (14) is formed in the sludge box (2), a second plug plate (141) is slidably connected to the inner wall of the second cavity (14), a second elastic element is arranged between the second plug plate (141) and the inner wall of the second cavity (14), an inserting block (142) is connected to one end, far away from the second elastic element, of the second plug plate (141), and a first groove (111) matched with the inserting block (142) is formed in the first floating block (11);

the automatic clear water discharging assembly comprises a working groove (16) formed in a first box body (201), telescopic plates (161) are connected to the inner walls of the upper side and the lower side of the working groove (16), a third floating block (17) is arranged between the telescopic plates (161), and a water outlet (171) is formed in the third floating block (17).

2. Dredging device for black and odorous river surge management according to claim 1, characterized in that the pneumatic assembly comprises a third cavity (18) arranged on a third floating block (17), a baffle (181) for blocking a water outlet (171) is slidably connected to the inner wall of the third cavity (18), a third elastic element is arranged between the baffle (181) and the inner wall of the third cavity (18), one end, far away from the third elastic element, of the baffle (181) is connected with a telescopic pipe (182), the pneumatic assembly further comprises a fourth cavity (19) arranged in a sludge tank (2), an air duct is arranged between the telescopic pipe (182) and the fourth cavity (19), the inner wall of the fourth cavity (19) is connected with a fourth elastic element, one end, far away from the inner wall of the fourth cavity (19), of the fourth elastic element is connected with a piston block (191), and the piston block (191) is movably propped against the first floating block (11).

3. The dredging device for black and odorous river surge management according to claim 1, wherein the purifying liquid adding mechanism comprises a driving assembly and an adding assembly, the driving assembly comprises a rotating rod (21) rotatably connected in the recovery pipe (5), blades (211) distributed circumferentially are arranged on the outer wall of the rotating rod (21), a cam (212) is further fixedly arranged on the rotating rod (21), and the driving assembly further comprises a guide plate (20) arranged on the inner wall of the recovery pipe (5).

4. A dredging device for black and odorous river surge management according to claim 3, characterized in that the adding component comprises a shell (22) fixedly connected with the recovery pipe (5) through a connecting plate, the interior of the shell (22) is divided into a liquid storage cavity (221) and a working cavity (222) through a partition plate, a first one-way valve is arranged between the working cavity (222) and the liquid storage cavity (221), a movable piston (23) is slidably connected to the inner wall of the working cavity (222), a fifth elastic element is arranged between the movable piston (23) and the bottom wall of the working cavity (222), a movable rod (231) is further connected to the movable piston (23), one end of the movable rod (231) far away from the movable piston (23) penetrates through the shell (22) and is connected with a stress plate (232), the stress plate (232) is movably abutted against the cam (212), the working cavity (222) is further connected with a guide tube (233) through a second one-way valve, and the guide tube (233) is connected with the recovery pipe (5).

5. Dredging device for black and odorous river surge treatment according to claim 4, characterized in that the inner wall of the recovery pipe (5) is connected with a supporting plate (24), the supporting plate (24) is rotationally connected with a rotating shaft (241), stirring blades (242) which are uniformly distributed are arranged on the rotating shaft (241), a secondary bevel gear (243) is arranged on the rotating shaft (241), and a main bevel gear (213) which is meshed and connected with the secondary bevel gear (243) is arranged on the rotating rod (21).