CN217996866U - Dredging equipment that water supply and drainage engineering used - Google Patents

Abstract

The utility model relates to a give drainage engineering technical field, concretely relates to desilting equipment for drainage engineering, it can reduce the flocculating agent and use, use cost is reduced, including the treatment tank, the input of treatment tank is installed and is taken out the mud pipe, take out and install the slush pump on the mud pipe, supporting holding vessel and the pressure filter of installing in one side of treatment tank, still include the pneumatic cylinder, the middle part of treatment tank is provided with the baffle subassembly that has filtering capability, baffle subassembly separates into extrusion chamber and reaction chamber with the treatment tank by last to lower, the top at the treatment tank is installed to the pneumatic cylinder, the bottom output of pneumatic cylinder passes the fixed lateral wall of treatment tank and stretches into to extrusion intracavity portion, the inside upside slip in extrusion chamber is provided with the clamp plate, the clamp plate is connected with the bottom output of pneumatic cylinder, it installs at extrusion chamber upside to take out the mud pipe intercommunication, the motor is installed to the bottom of treatment tank, the top output of motor is connected with the (mixing) shaft.

Description

A dredging equipment for water supply and drainage engineering

technical field

The utility model relates to the technical field of water supply and drainage engineering, in particular to a dredging equipment for water supply and drainage engineering.

Background technique

Water supply and drainage engineering is one of the engineering disciplines, referred to as water supply and drainage. Outdoor water supply engineering, also known as water supply engineering, is an engineering facility built to meet the water needs of urban and rural residents and industrial production. Drainage engineering refers to the collection and discharge of human domestic sewage and production of various wastewater, excess surface water and groundwater (lowering groundwater table) projects. The main facilities include drainage ditches or pipelines at all levels and their ancillary buildings. Depending on different drainage objects and drainage requirements, water pumps or other water lifting machinery, sewage treatment buildings, etc. can also be added. In water supply and drainage projects, especially in drainage In the system, because the sewage contains a large amount of silt and other absorbent floating matter, and these silt will gradually form silt, if it is not cleaned for a long time, it will cause blockage of the drainage pipe and affect the discharge of sewage. In order to solve this problem, people Generally, the sludge is pumped into the flocculation tank through the sewage pump, and the flocculant is directly added to flocculate and stand still to realize solid-liquid stratification. Finally, the supernatant is transported to the detection equipment for detection, and is processed separately. The solids in the bottom layer are transported to the filter press equipment for press filtration to form a filter cake, and finally discharged and thrown away or used as building backfill. However, since the freshly extracted sludge itself has a certain solid-liquid separation ability, the flocculant is directly used If not, the amount of flocculant required is larger, and more flocculant is wasted, resulting in high cost.

Utility model content

(1) Solved technical problems

Aiming at the technical defects in the sludge treatment by dredging equipment in the prior art, the utility model provides a dredging equipment for water supply and drainage engineering that can reduce the use of flocculants and use costs.

(2) Technical solution

In order to achieve the above purpose, the utility model provides the following technical solutions: a dredging equipment for water supply and drainage engineering, including a treatment tank, the input end of the treatment tank is equipped with a mud pump, and a mud pump is installed on the mud pump, and the treatment tank One side of the tank is equipped with a storage tank and a filter press, and also includes a hydraulic cylinder. The middle part of the processing tank is provided with a partition assembly with a filtering function, and the partition assembly separates the processing tank from top to bottom into extrusion chamber and a reaction chamber, the hydraulic cylinder is installed on the top of the processing tank, and the output end of the bottom of the hydraulic cylinder passes through the fixed side wall of the processing tank and extends into the inside of the extrusion chamber, and the upper side of the extrusion chamber is slidably provided with Pressing plate, and the pressing plate is connected with the bottom output end of the hydraulic cylinder, the mud suction pipe is connected and installed on the upper side of the extrusion chamber, the bottom end of the processing tank is equipped with a motor, and the top output end of the motor is connected with a stirring shaft, and the stirring The shaft passes through the bottom side wall of the treatment tank and extends into the reaction chamber. A stirring blade is installed on the stirring shaft, and a flocculant adder is installed on the upper side of the reaction chamber. The output end of the extrusion chamber and the output end of the reaction chamber Both are connected with the input end of the filter press, the upper input end of the storage tank is communicated with the upper side of the side wall of the reaction chamber through a suction pipe, and a suction pump is installed on the suction pipe, and the suction pipe is input to the reaction chamber. One end inside the chamber is connected with a water pump through a height adjustment mechanism, and the input end of the filter press communicates with the lower output end of the reaction chamber.

It is further explained that the separator assembly includes multiple layers of grid plates with through holes, and there are intervals between the multi-layer grid plates, and filter cloth is laid between the intervals, and the filter cloth is clamped on the mesh. Between the grid plates, the peripheral outer wall of the partition plate assembly is in detachable sealing connection with the lower side of the peripheral inner wall of the extrusion chamber.

Still further, a ring of reinforcing plates is provided on the inner wall of the extrusion chamber, and the circumferential outer wall of the pressing plate is in sliding contact with the circumferential inner wall surrounded by the reinforcing plates.

For the height adjustment mechanism, it includes a telescopic hose, a lead screw and a handle. A rotating through hole is opened on the side wall of the reaction chamber, and a rotating shaft is fixedly installed on one end of the handle. The rotating shaft passes through the rotating through hole and passes through the rotating through hole. The mechanical seal is connected in rotation. The first bevel gear is connected to the end of the rotating shaft located in the reaction chamber. The lead screw is longitudinally arranged on the inner wall of the reaction chamber close to the handle side, and both ends of the lead screw are rotatably installed with fixed plates. A fixed plate is fixedly connected with the inner wall of the reaction chamber, the input end of the water suction pipe is set downward, and the input end of the water suction pipe communicates with the top output end of the water suction head through the telescopic hose, and the water suction head The outer fixed sleeve is equipped with a moving block, and a chute is provided on the side wall of the reaction chamber along the direction of the lead screw. One end of the moving block is slidably matched with the inside of the chute, and a threaded through hole is provided on the moving block. The wire The bar runs through and is threadedly connected with the threaded through hole. The top of the leading screw passes through the fixed plate on the upper side and is connected with a drive shaft. The top of the drive shaft is equipped with a second bevel gear, and the first bevel gear meshes with the second bevel gear.

In order to improve the service life of the lead screw, the outer cover of the lead screw is provided with a first plastic protective cover and a second plastic protective cover with a telescopic function, and the top of the first plastic protective cover is connected with the bottom end of the fixing plate on the upper side , the bottom end of the first plastic protective cover is connected with the top end of the moving block, the top end of the second plastic protective cover is connected with the bottom end of the moving block, and the bottom end of the second plastic protective cover is connected with the fixed plate at the lower side Top connection.

For the convenience of adding flocculant, the flocculant adder includes a transparent box with scales, the transparent box is fixedly installed on the outer wall of the reaction chamber, the bottom of the transparent box communicates with the upper side of the inside of the reaction chamber through the dosing tube, A valve is installed on the drug pipe.

In order to facilitate the rapid flow of the flocculant into the reaction chamber, the part of the dosing pipe penetrating through the side wall of the reaction chamber is arranged in a direction inclined to the inside of the reaction chamber, and the dosing pipe is sealed and connected to the side wall of the reaction chamber.

On the basis of the foregoing solution, an observation window is provided on the side wall of the reaction chamber, and the observation window is located at the front side of the pumping head, and a high-strength transparent plate is installed on the observation window.

In order to ensure the integrity of the whole, bases are installed at the bottoms of the treatment tank, the storage tank and the filter press.

(3) Beneficial effects

Compared with the prior art, the utility model provides a dredging equipment for water supply and drainage engineering, which has the following beneficial effects:

1. The silt can be pumped to the inside of the extrusion chamber through the pumping pipe, and the pressure plate is driven to move downward through the telescopic action of the hydraulic cylinder. The water is squeezed out, and squeezed into the reaction chamber under the action of the separator assembly, the flocculant is added to the reaction chamber through the flocculant additive, and the stirring blade on the stirring shaft is driven by the motor to rotate to realize the flocculant Mixing with sewage, after the flocculant and the sewage are merged, the sewage flocculation is realized, and after the flocculation, it is allowed to stand for a period of time to realize the solid-liquid stratification;

2. Through the height adjustment mechanism, according to the position of the solid-liquid layer, adjust the height of the pump head to the lowest point of the supernatant, and then turn on the pump to transport the supernatant to the storage tank for subsequent detection, and then flocculate the solid It can also be transported to the inside of the filter press for pressure filtration. Through the above structure, the initial sludge can be pre-squeezed and filtered, avoiding the prior art to directly flocculate the initial sludge, reducing the use of flocculants and reducing economic costs;

3. Since the position of solid-liquid stratification inside the reaction chamber is uncertain, the use position of the pump head can be adjusted through the height adjustment mechanism, which is convenient for all the supernatant liquid to be extracted according to different stratification positions, and the adaptability is stronger.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural schematic diagram that grid plate of the present invention is connected with filter cloth;

Fig. 3 is a schematic diagram of a partially enlarged structure at A in Fig. 1 in the utility model;

Fig. 4 is a top view cross-sectional structural schematic diagram of the moving block and the chute in the utility model.

In the figure: 1. Mud pumping pipe; 2. Mud pump; 3. Storage tank; 4. Filter press; 5. Hydraulic cylinder; 6. Extrusion chamber; 7. Reaction chamber; 8. Press plate; 9. Motor; 10 1. Stirring shaft; 11. Stirring blade; 12. Suction pipe; 13. Suction pump; 14. Suction head; 15. Grid plate; 16. Filter cloth; ; 20, handle; 21, rotating shaft; 22, the first bevel gear; 23, fixed plate; 24, moving block; 29. Second protective cover; 30. Transparent box; 31. Dosing tube; 32. Valve; 33. High-strength transparent plate.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1 to Fig. 4, a kind of dredging equipment used for water supply and drainage engineering, comprises treatment tank, and the input end of treatment tank is equipped with suction pipe 1, and mud pump 2 is installed on the suction pipe 1, and the treatment tank One side is equipped with a storage tank 3 and a filter press 4, and also includes a hydraulic cylinder 5. The middle part of the processing tank is provided with a partition assembly with a filtering function, and the partition assembly separates the processing tank from top to bottom. Pressure chamber 6 and reaction chamber 7, the hydraulic cylinder 5 is installed on the top of the processing tank, and the bottom output end of the hydraulic cylinder 5 passes through the fixed side wall of the processing tank and extends into the inside of the extrusion chamber 6, the extrusion chamber 6 A pressure plate 8 is slidingly installed on the upper side of the inner side, and the pressure plate 8 is connected to the bottom output end of the hydraulic cylinder 5. The sludge can be pumped to the inside of the extrusion chamber 6 through the mud pumping pipe 1, and the pressure plate 8 is driven by the telescopic action of the hydraulic cylinder 5. Moving down, under the action of the baffle assembly with filtering function, the sludge is initially squeezed, the water contained therein is squeezed out, and squeezed into the reaction chamber 7 under the action of the baffle assembly;

The mud pumping pipe 1 is connected and installed on the upper side of the extrusion chamber 6, the bottom end of the processing tank is equipped with a motor 9, and the top output end of the motor 9 is connected with a stirring shaft 10, and the stirring shaft 10 passes through the bottom of the processing tank The side wall extends into the inside of the reaction chamber 7, the stirring shaft 10 is equipped with a stirring blade 11, the upper side of the reaction chamber 7 is equipped with a flocculant additive, the output end of the extrusion chamber 6 and the output end of the reaction chamber 7 are both It is connected with the input end of the filter press 4, and the flocculant is added to the interior of the reaction chamber 7 through the flocculant adder, and the stirring blade 11 on the stirring shaft 10 is driven by the motor 9 to rotate, so as to realize the separation between the flocculant and the sewage. Mixing, after the flocculant and the sewage are merged, the sewage flocculation is realized. After the flocculation, it is allowed to stand for a period of time to realize the solid-liquid stratification. Through the height adjustment mechanism, the height of the pump head 14 is adjusted according to the position of the solid-liquid stratification. The lowest point of the supernatant, then turn on the water pump 13 to transport the supernatant to the storage tank 3 and wait for subsequent detection;

The input end of the filter press 4 is connected to the lower output end of the reaction chamber 7, and then the flocculated solids are also transported to the inside of the filter press 4 for pressure filtration. Through the above structure, the initial sludge can be pre-treated. Squeeze and filter to avoid direct flocculation of the initial sludge in the prior art, reduce the use of flocculants, and reduce economic costs. Connected, the suction pipe 12 is equipped with a suction pump 13, and the end of the suction pipe 12 input to the inside of the reaction chamber 7 is connected to the water head 14 through a height adjustment mechanism. Since the position of the solid-liquid stratification inside the reaction chamber 7 is uncertain, Therefore, the use position of the water pump 14 can be adjusted through the height adjustment mechanism, so as to facilitate the extraction of all the supernatant liquid according to different stratification positions, and the adaptability is stronger.

Wherein the height adjustment mechanism comprises a telescopic hose 18, a lead screw 19 and a handle 20, the side wall of the reaction chamber 7 is provided with a rotating through hole, and one end of the handle 20 is fixedly mounted with a rotating shaft 21, the rotating shaft 21 runs through the rotating through hole and It is rotatably connected with the rotating through hole through a mechanical seal, and one end of the rotating shaft 21 located in the reaction chamber 7 is connected with a first bevel gear 22. The lead screw 19 is longitudinally arranged on the inner wall of the reaction chamber 7 near the handle 20, and the lead screw Both ends of 19 are rotatably equipped with fixed plates 23, and the two fixed plates 23 are fixedly connected with the inner wall of the reaction chamber 7. The input end of the water suction pipe 12 is set downward, and the input end of the water suction pipe 12 passes through the flexible soft The pipe 18 communicates with the top output end of the pumping head 14, the external fixed sleeve of the pumping head 14 is provided with a moving block 24, and the side wall of the reaction chamber 7 is provided with a chute 25 along the direction of the lead screw 19, One end of the moving block 24 is slidingly matched with the inside of the chute 25, and the moving block 24 is provided with a threaded through hole through which the lead screw 19 passes through and is threadedly connected with the threaded through hole. The plate 23 is also connected with a drive shaft 26, the top of the drive shaft 26 is equipped with a second bevel gear 27, the first bevel gear 22 meshes with the second bevel gear 27, and the handle 20 can drive the rotating shaft 21 to rotate, thereby driving the first bevel gear 22 rotation, the position of the lead screw 19 can be maintained by the fixed plate 23, the lead screw 19 can be rotated through the connection through rotation, and the meshing between the second bevel gear 27 and the first bevel gear 22, turning the handle 20, can drive The leading screw 19 rotates, and through the sliding fit between the moving block 24 and the chute 25, under the action of the threaded connection between the leading screw 19 and the threaded through hole, the moving plate is moved up and down, thereby realizing the adjustment of the water head 14. The height adjustment is convenient for accurately finding the position of solid-liquid stratification. Compared with the traditional pumping method, it can be more accurate, avoiding incomplete pumping of the final supernatant or pumping liquid with flocculated solids.

It is further illustrated that the separator assembly includes multiple layers of grid plates 15 with through holes, and intervals are provided between the multi-layer grid plates 15, and filter cloth 16 is laid between the intervals, and the filter cloth 16 Clamped between the grid plates 15, the peripheral outer wall of the partition plate assembly is detachably connected with the lower side of the circumferential inner wall of the extrusion chamber 6, and the filter cloth 16 can be supported by a plurality of grid plates 15, so that the filter cloth 16 can be effectively Supporting the weight of the pressing plate 8 and the silt, the moisture in the silt can be effectively and fully squeezed through the filter cloth 16, and the filter cloth 16 is made of a material with high toughness and strength.

On the basis of the foregoing scheme, a circle of reinforcing plates 17 is arranged on the inner wall of the extrusion chamber 6, and the circumferential outer wall of the pressing plate 8 is in sliding contact with the circumferential inner wall surrounded by the reinforcing plates 17. The setting can enhance the use strength of the side wall of the extrusion chamber 6, prevent damage during extrusion, and improve the reliability of use. The outer cover of the screw 19 is provided with a first plastic protective sleeve and a second plastic protective sleeve with a telescopic function. Protective cover, the top of the first plastic protective cover is connected with the bottom end of the fixed plate 23 on the upper side, the bottom end of the first plastic protective cover is connected with the top of the moving block 24, and the top of the second plastic protective cover is connected with the moving block 24 is connected at the bottom, and the bottom of the second plastic protective cover is connected with the top of the fixed plate 23 on the lower side, and moves up and down on the moving block 24 through the first plastic protective cover and the second plastic protective cover with telescopic function In the process, it can ensure that the upper side of the screw 19 is protected while the screw 19 is rotating, so as to reduce the phenomenon of soaking and corrosion. The flocculant adder includes a transparent box 30 with a scale, and the transparent box 30 is fixedly installed On the outer wall of the reaction chamber 7, the bottom of the transparent box 30 communicates with the upper side of the interior of the reaction chamber 7 through the dosing tube 31, and the valve 32 is installed on the dosing tube 31, which is convenient for observation through the transparent box 30 with scales. Place the amount of flocculant, after the amount is determined, the flocculant can be transported to the inside of the reaction chamber 7 through the dosing pipe 31 by opening the valve 32, and the part of the dosing pipe 31 that runs through the side wall of the reaction chamber The inside of the reaction chamber 7 is arranged in an inclined direction, and the dosing pipe 31 is sealed and connected with the side wall of the reaction chamber 7, so that the flocculant flows to the inside of the reaction chamber 7. The treatment tank, the storage tank 3 and the filter press 4 Bases 34 are installed at the bottom ends to improve the integrity of the whole.

To sum up, the dredging equipment used in the water supply and drainage project is firstly installed in the use position as a whole, and then the mud pumping pipe 1 is transported to the mud extraction position, the mud pump 2 is turned on, and the mud is transported to the inside of the extrusion chamber 6, Then connect the hydraulic cylinder 5 with the oil supply system of the external hydraulic station through the oil circuit, and push the pressure plate 8 to move downward through the extension of the hydraulic cylinder 5 to squeeze the sludge and filter the water contained in it in the clapboard assembly 16 to extrude to the inside of the reaction chamber 7 under the filtering action of 16, so that the sludge can be pre-treated, and the squeezed sludge is transported to the filter press 4 for pressure filtration, and finally forms a filter cake, and then the squeezed water flow Enter the inside of the reaction chamber 7, set the amount of flocculant in the transparent box 30 through the scale, then open the valve 32 to transport the flocculant into the reaction chamber 7, turn on the motor 9 to drive the stirring blade 11 to rotate fully the sewage and flocculant Mix and stir. After the mixing is completed, the flocs will drop and gradually form a precipitate. After the solid and liquid are separated, observe the layered position between the supernatant and the solid flocs through the observation window, and then turn the handle 20 to adjust the water head 14. From the bottom position to the layered position, the pump 13 is turned on to transport the supernatant to the storage tank 3 for storage and waiting for subsequent detection and processing. After the supernatant is extracted, the solid flocs are transported to the inside of the filter press 4 Press filtration to form a filter cake and process the filter cake, wherein the filter press 4 itself has a mud pump, which can extract sludge and solid flocs, and the reaction chamber 7 and the storage tank 3 are equipped with The pressure-stabilizing valve that ensures the connection with the external atmospheric pressure is convenient for conveying materials to its interior.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (9)

1. The dredging equipment for water supply and drainage engineering comprises a treatment tank, wherein a mud pumping pipe (1) is installed at the input end of the treatment tank, a mud pump (2) is installed on the mud pumping pipe (1), a storage tank (3) and a filter press (4) are installed on one side of the treatment tank in a matched mode, the dredging equipment is characterized by further comprising a hydraulic cylinder (5), a partition plate assembly with a filtering function is arranged in the middle of the treatment tank, the treatment tank is divided into an extrusion cavity (6) and a reaction cavity (7) by the partition plate assembly from top to bottom, the hydraulic cylinder (5) is installed at the top end of the treatment tank, the bottom output end of the hydraulic cylinder (5) penetrates through the fixed side wall of the treatment tank and extends into the extrusion cavity (6), a pressing plate (8) is arranged on the upper side of the extrusion cavity (6) in a sliding mode, the pressing plate (8) is connected with the bottom output end of the hydraulic cylinder (5), the mud pumping pipe (1) is installed on the upper side of the extrusion cavity (6) in a communicated mode, a motor (9) is installed at the bottom end of the treatment tank, the top output end of the motor (9) is connected with a flocculating agent (10), the side wall of the reaction cavity (7) penetrates through the side wall of the reaction cavity (7), and a stirring shaft (7), and an output end of a stirring shaft (11) is installed on the reaction cavity (7), and an output end of the stirring shaft (7) and a stirring shaft (7), the upside input of holding vessel (3) pass through drinking-water pipe (12) with the lateral wall upside intercommunication of reaction chamber (7), install suction pump (13) on drinking-water pipe (12) to the inside one end of reaction chamber (7) is imported through high adjustment mechanism in drinking-water pipe (12) is connected with pumping head (14), the input of pressure filter (4) with the downside output intercommunication of reaction chamber (7).

2. A dredging device for water supply and drainage engineering according to claim 1, wherein the partition plate assembly comprises a plurality of layers of grid plates (15) with through holes, and spaces are arranged among the layers of grid plates (15), and filter cloth (16) is laid among the spaces, and the filter cloth (16) is clamped between the grid plates (15), and the circumferential outer wall of the partition plate assembly is detachably and hermetically connected with the lower side of the circumferential inner wall of the extrusion chamber (6).

3. A dredging device for water supply and drainage engineering according to claim 2, wherein a circle of reinforcing plate (17) is arranged on the inner wall of the extrusion cavity (6), and the circumferential outer wall of the pressing plate (8) is in sliding contact with the circumferential inner wall surrounded by the reinforcing plate (17).

4. The dredging device for water supply and drainage engineering according to claim 3, wherein the height adjusting mechanism comprises a telescopic hose (18), a lead screw (19) and a handle (20), a rotating through hole is formed in the side wall of the reaction chamber (7), a rotating shaft (21) is fixedly mounted at one end of the handle (20), the rotating shaft (21) penetrates through the rotating through hole and is rotatably connected with the rotating through hole through mechanical sealing, a first bevel gear (22) is connected to one end, located in the reaction chamber (7), of the rotating shaft (21), the lead screw (19) is longitudinally arranged in the reaction chamber (7) and is close to the inner wall of one side of the handle (20), fixing plates (23) are rotatably mounted at two ends of the lead screw (19), the two fixing plates (23) are fixedly connected with the inner wall of the reaction chamber (7), the input end of the water pumping pipe (12) is arranged downwards, the input end of the water pumping pipe (12) is communicated with the top output end of the water pumping head (14) through the telescopic hose (18), a moving block (24) is fixedly sleeved outside the reaction chamber (7), a through hole (25) is formed in the side wall of the reaction chamber (7) and is in a sliding fit with the through groove (25), and a through hole (25) is formed in the sliding groove (25), the top end of the screw rod (19) penetrates through the fixing plate (23) positioned on the upper side and is connected with a driving shaft (26), a second bevel gear (27) is installed at the top end of the driving shaft (26), and the first bevel gear (22) is meshed with the second bevel gear (27).

5. A dredging device for water supply and drainage engineering according to claim 4, wherein the outer part of the screw rod (19) is sleeved with a first plastic protecting sleeve and a second plastic protecting sleeve which have a telescopic function, the top end of the first plastic protecting sleeve is connected with the bottom end of the fixing plate (23) positioned at the upper side, the bottom end of the first plastic protecting sleeve is connected with the top end of the moving block (24), the top end of the second plastic protecting sleeve is connected with the bottom end of the moving block (24), and the bottom end of the second plastic protecting sleeve is connected with the top end of the fixing plate (23) positioned at the lower side.

6. The dredging equipment for water supply and drainage engineering according to claim 5, wherein the flocculating agent adding device comprises a graduated transparent box (30), the transparent box (30) is fixedly installed on the outer side wall of the reaction cavity (7), the bottom end of the transparent box (30) is communicated with the upper side inside the reaction cavity (7) through a dosing pipe (31), and a valve (32) is installed on the dosing pipe (31).

7. A dredging device for water supply and drainage engineering according to claim 6, wherein the part of the dosing pipe (31) penetrating through the side wall of the reaction chamber (7) is arranged in a direction inclined towards the inside of the reaction chamber (7), and the dosing pipe (31) is hermetically connected with the side wall of the reaction chamber (7).

8. The dredging equipment for water supply and drainage engineering according to claim 7, wherein an observation window is arranged on the side wall of the reaction chamber (7), the observation window is positioned at the front side of the water pumping head (14), and a high-strength transparent plate (33) is arranged on the observation window.

9. A dredging device for water supply and drainage engineering according to claim 8, characterized in that the bottom ends of the treatment tank, the storage tank (3) and the filter press (4) are all provided with a base (34).

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