40results about How to "Guaranteed dredging effect" patented technology

The invention relates to a pipeline composite dredging dust removal device and a dredging dust removal method using the same. The pipeline composite dredging dust removal device comprises a drilling part and a supporting walking part, wherein the drilling part comprises a spiral drill rod, a middle drill rod, stirring blades and a conical drill bit, and the supporting walking part comprises a front end supporting seat, a rear end supporting seat, a walking oil cylinder and walking wheels. The spiral drill rod is adopted and combined with the multiple groups of progressive stirring blades on the middle drill rod, so that the whole dredging work can be carried out, deposits and dust of the inner wall of a pipeline can be effectively removed, grading stirring can be carried out, and the overload work can be avoided; and a progressive structure is used and combined with the walking wheels by a walking device, and when the dredging operation is not carried out, the walking device advances quickly by the walking wheels, and when the dredging operation is carried out, the walking device advances by the progressive structure, and the walking wheels are controlled to participate in work according to the pressure of the walking oil cylinder, so that the working efficiency can be improved, and enough travel pushing force can be provided.

The invention provides a horizontal underground culvert pipe blockage dredging robot and a working method thereof. The robot comprises a travelling mechanism, a dredging machine body, a beating and dredging mechanism, a high-pressure dredging mechanism and a camera shooting mechanism, wherein the dredging machine body is arranged in the travelling mechanism, the high-pressure dredging mechanism isarranged at the front end of the dredging machine body, the high-pressure dredging mechanism is connected with an external high-pressure water pump through a conveying line, the high-pressure water pump is connected with an external water source, the camera shooting mechanism is arranged in the middle of the high-pressure dredging mechanism, the camera shooting mechanism is in data connection with an external upper computer through the conveying line, the beating and dredging mechanism are further arranged at the lower end of the high-pressure dredging mechanism, and a driven travelling mechanism is arranged at the rear end of the dredging machine body. According to the robot and the method, the travelling mechanism is arranged, so that a robot can travel in a culvert pipe, the influencein the culvert pipe is collected through the camera shooting mechanism and is transmitted back to the upper computer until a blocking point is found, the blockage is dredged by the cooperation of thebeating and dredging mechanism and the high-pressure dredging mechanism, so that the dredging of the culvert pipe blockage is completed.

The invention discloses an anti-blocking rapping device for a coal dropping pipe of a thermal power plant and a using method thereof. The anti-blocking rapping device comprises the coal dropping pipe, an upper fixing ring, a lower fixing ring and a mounting frame, the coal dropping pipe is provided with the upper fixing ring, the lower fixing ring is arranged below the upper fixing ring, rubber mats are arranged on the inner wall of the upper fixing ring and the inner wall of the lower fixing ring, fixing bolts are arranged on one side wall of the upper fixing ring and one side wall of the lower fixing ring, the mounting frame is arranged between the upper fixing ring and the lower fixing ring, a sliding sleeve is arranged on the mounting frame, and an electric push rod is arranged at the top end of the sliding sleeve. The anti-blocking rapping device has the beneficial effects that by arranging the sliding sleeve and a hydraulic rod, in the working process of the device, the electric push rod pushes the sliding sleeve to move downwards, then the sliding sleeve drives a vibration mechanism to move downwards, a vibration ball can integrally beat the coal dropping pipe, the dredging effect of the coal dropping pipe is guaranteed, and the practicability of the device is improved.

The invention provides a forward and reverse scouring dredging method for a diversion canal of a hydropower station and a diversion canal structure. The method comprises the steps that S10, the gradation of deposited silt in the diversion canal is determined; S20, the representative particle size and the corresponding starting flow velocity of the deposited silt are determined according to a gradation curve of the deposited silt; S30, the starting flow needed for removing the deposited silt through water flow scouring is determined according to the Manning formula; S40, the target opening degree of a gate of the diversion canal is determined according to the starting flow and a flow discharge capacity curve of the diversion canal; and S50, according to the target opening degree, a diversion gate at the head of the diversion canal is opened firstly for forward scouring, and then a power generation diversion tunnel gate at the tail of the diversion canal is opened for reverse scouring. Based on the technical scheme, forward and reverse scouring dredging is achieved through hydraulic power, a large amount of deposited silt is removed with low cost, and the power generation loss and the dredging cost caused by silt deposition of the hydropower station are reduced.

The check gate with the high-pressure silt flushing function comprises a mounting plate and a baffle which are arranged at the bottom of a gate body, a gate body is arranged on the mounting plate, and a high-pressure silt flushing mechanism is arranged in the gate body; the high-pressure silt flushing mechanism comprises two symmetrically-arranged first steel pipes pre-buried in the baffle, the side wall of each first steel pipe is fixedly connected with a plurality of water outlet pipes arranged in an array mode, and the other ends of the water outlet pipes penetrate through the side wall of the baffle and are fixedly connected with high-pressure anti-blocking nozzles. And two symmetrically arranged pump bodies are fixedly connected to the two sides of the gate body. According to the check gate with the high-pressure silt flushing function, water flow can be pumped through the pump body to conduct high-pressure silt flushing on silt at the bottom of the gate body, the desilting efficiency and effect are guaranteed, meanwhile, the pumped water flow can be filtered, foreign matter on the surface of the filter screen can be automatically cleaned, blockage of the filter screen can be avoided, and the high-pressure silt flushing effect is guaranteed.

The invention discloses a kitchen wastewater filtering treatment device, and relates to the technical field of wastewater filtering treatment devices. The kitchen wastewater filtering treatment device comprises a water tank, a filtering treatment mechanism is fixedly connected to the middle of the lower side surface of the water tank, the filtering treatment mechanism comprises a water leakage pipe, a filtering hopper, a motor box and a rotary deposition prevention mechanism, the upper side of the water leakage pipe is fixedly connected with the water tank, the filtering hopper is inserted into the upper side of the water leakage pipe through the water tank, the middle of the left side of the water leakage pipe is fixedly connected with the motor box, and the upper side of the motor box is connected with a water leakage hopper in an inserted mode. According to the kitchen wastewater filtering treatment device, the deposition prevention mechanism can realize disordered shaking through resistance of sundries in the rotating process, fan-shaped blocks can extend out to enlarge the cleaning area when a deposition prevention cleaning disc is subjected to resistance, and the fan-shaped blocks can irregularly rotate through different resistances, so that when the sundries are deposited, the angle is quickly adjusted to push away deposited sundries to prevent deposition and blockage.

The invention discloses a sludge cleaning device for water conservancy ecological environment protection and a cleaning method thereof, belonging to the technical field of water conservancy engineering. A sludge cleaning device for water conservancy and ecological environment protection, comprising a hull and a swirl column, the other end of the swirl column is fixedly connected with a negative pressure column, the side wall of the swirl column is fixedly connected with a feed pipe, and one end of the feed pipe is rotatably connected There is a diversion pipe, the bottom of the diversion pipe is connected with a dredging column, the dredging column is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a drive shaft, one end of the drive shaft is fixedly connected with a spiral plate, and the drive shaft The other end is fixedly connected to the propeller; the worm drives the dredging column to rotate through the rocker mechanism; the negative pressure column is fixedly connected to the spray pipe, the top of the spray pipe is provided with a spray assembly for irrigation, and the positioning shaft is provided with a device for adjusting the rotation angle of the diversion pipe. The adjustment assembly; the invention not only reduces the difficulty of dredging, but also further ensures the high efficiency, rationality and accuracy of sludge cleaning.

The invention discloses a coal feeder with an anti-blocking function, and relates to the field of coal feeders. The coal feeder comprises a coal feeder body, a feeding pipe and a discharging pipe, the outer sides of conveying rollers are movably connected with a conveying belt, a knocking mechanism is installed in the conveying belt, one end of one conveying roller penetrates through the side wall of the coal feeder body, extends to the outside and is connected with a first motor, and a dredging assembly is arranged below one side in the coal feeder body. By means of the knocking mechanism, the conveying belt can be knocked in a reciprocating mode, coal scraps adhering to the surface of the conveying belt can be shaken off, the daily cleaning effect of the conveying belt is guaranteed, the situation of mechanical faults is reduced, the arranged dredging assembly can extrude coal accumulated in the discharging pipe back and forth, the coal can be rapidly discharged to the outside, and the conveying belt can be cleaned conveniently. The phenomenon that the discharging pipe is blocked is reduced, the feeding efficiency and continuity of the coal feeder are improved, and the conveying progress of coal is accelerated.

The invention discloses a sprayer cleaning device including ink pads in one-to-one correspondence with sprayers and fitting with spray nozzles of the sprayers in a sealed manner, a buffer bottle used for enabling all ink pads to be communicated with each other, a diaphragm pump communicated with the buffer bottle, and a micro-metering valve arranged between the buffer bottle and the diaphragm pump and used for adjusting pressure. According to the invention, the added buffer bottle enables all the ink pads to be communicated with each other, so that pressure received by all the sprayers is generally the same. Therefore, problems of inconsistent dredging and cleaning of the sprayers due to different pressure are avoided and time and cost are saved effectively. Besides, pressure adjustment is also performed by using the micro-metering valve, so that sprayer damage due to too large or too small pressure is avoided; the service lifetime of the sprayers is prolonged; the cost is reduced; and the cleaning and dredging effects of the sprayers are guaranteed. The invention also discloses a printed including the above sprayer cleaning device.

The invention discloses a system for clearing an urban drainage pipeline and transporting sludge. The system comprises a transport vehicle, a sludge and water separation device, a pipeline dredging device, a hydraulic system and an electrical control box. The interior of the urban drainage pipeline can be dredged through the pipeline dredging device, moving of the pipeline dredging device in the drainage pipeline can be controlled, and thus the dredging effect in the drainage pipeline is effectively guaranteed; the cleared sludge can enter the sludge and water separation device through a hose,through the separation effect of the sludge and water separation device, a solid part and a liquid part of the sludge are separated, the liquid part is left in the sludge and water separation deviceand sent back into the drainage pipeline, the solid part of the sludge is discharged through a discharge port to be collected, and then the collected solid part of the sludge is transported through the transport vehicle; and the transported sludge basically does not contain moisture, thus the volume of the sludge in the transporting process is decreased, and liquid in the sludge can be prevented from leaking in the transporting process.

The invention discloses a water conservancy project discharge pipeline which comprises a main drainage pipe, an auxiliary side pipe is fixedly connected to the middle of the outer side face of the main drainage pipe, a driving barrier plate is slidably connected to the middle of the interior of the auxiliary side pipe, and a transmission scraping mechanism is fixedly connected to the side, close to the main drainage pipe, of the driving barrier plate; the transmission scraping mechanism extends to the bottom end in the main drainage pipe, cleaning liquid supply mechanisms are uniformly and fixedly connected to the surface of the bottom end in the main drainage pipe, a transmission connecting hole is formed in the center of the driving barrier plate, and pressurizing conical grooves are uniformly formed in the driving barrier plate and located on the outer side of the transmission connecting hole; and the middle position of the top of the main drainage pipe is rotationally connected with a limiting water baffle. The invention relates to the technical field of water conservancy projects. According to the water conservancy project discharge pipeline, the dredging capacity of preparing to move when blockage occurs is guaranteed, complete loss of the drainage capacity of the pipeline is avoided, and the drainage efficiency of the pipeline is improved.

The invention relates to a ship bottom silt removal robot. The ship bottom silt removal robot is used for removing the tilt at the bottom of an iron ship. The ship bottom silt removal robot comprisesa vehicle frame, four crawler walking mechanisms mounted on the vehicle frame, a buoyancy mechanism and a silt removal mechanism, and both sides of the bottom of the vehicle frame extend downwards toform two wing panels. The four crawler walking mechanisms are separately arranged at four corners of the vehicle frame. Each of the crawler walking mechanisms comprises a first motor and two magneticwheels, and the two magnetic wheels are connected by crawlers in a transmission mode. The silt removal mechanism comprises a first brush roller and a second brush roller. The first brush roller and the second brush roller are driven to rotate by a driving mechanism.

The invention provides a novel environment-friendly dredging head. The novel environment-friendly dredging head comprises a shell and a supporting rod, wherein the supporting rod is fixedly connectedto the upper surface of the shell, a screw rod is transversely arranged in the shell, blades are arranged on the screw rod, the blades are spirally distributed along the axis direction of the screw rod, the left end of the shell is provided with an open end, a bearing is arranged at the right end of the shell in a sleeve mode, a driving motor is arranged at the right end of the screw rod, a waterinlet pump and a silt suction pump are arranged on the two sides of the supporting rod correspondingly, the supporting rod is internally provided with a signal cable, and one end of the signal cable is electrically connected with the water inlet pump, the silt suction pump and the driving motor. According to the novel environment-friendly dredging head, the screw rod carries out reversely rotatingmovement, so that the sludge is promoted to enter the shell along the screw rod, it is ensured that the sludge can enter the shell under the condition that the sludge does not diffuse in the water, meanwhile, the good cutting performance and crushing capability of the blades are matched, so that the dredging work is well completed, the working efficiency is effectively improved, and meanwhile, the energy is saved, so that the production cost is reduced.

The invention provides a pedestal pan. The pedestal pan comprises a pedestal pan body and a water storage device; the pedestal pan body is provided with a second water supply opening; the second water supply opening faces an inlet of a pedestal pan blow-off pipeline; a water outflow assembly is provided with a second water outflow way for supplying water to the second water supply opening; the water outflow assembly further comprises a switching mechanism used for switching the first water outflow way and the second water outflow way to be communicated with a water inflow way. In a default state, the water inflow way is communicated with the first water outflow path, and cleaning water flowing out of the first water supply opening flushes the peripheral wall of the pedestal pan body; when the pedestal pan is blocked, the switching mechanism can enable the water inflow way to be communicated with the second water outflow way, and the second water supply opening sprays cleaning water towards the pedestal pan blow-off pipeline to perform dredging. The pedestal pan has a dredging function, is low in noise in normal use and is environment-friendly.

The invention relates to the technical field of pipeline dredging, and discloses a novel pipeline dredger. The novel pipeline dredger comprises a pipeline body, wherein a partition plate is arranged on the left side of the pipeline body, a rotating rod is arranged at the position of a middle shaft in the pipeline body, the rotating rod penetrates through the partition plate and extends out of the partition plate, and a handle is fixedly connected to the left side of the rotating rod. Through the arrangement of a first convex block and an inclined block, when the rotating rod pierces the blockage, the first convex block and the inclined block can get close to each other to penetrate through the blockage, then the rotating rod is pulled backwards, and the first convex block can be opened through the inclined block, so that follow-up treatment and dredging of the blockage are facilitated, and after the first convex block makes contact with the blockage, the blockages extrude an extrusion plate I, so that the extrusion plate I drives an extrusion block to move, the extrusion block can extrude a crushing cutter to stretch out, the blockages are stabbed and crushed, the dredging effect of the pipeline dredging device is good, and a pipeline can be effectively dredged.

The invention provides a preparation method of a diffusion layer with a catalytic action promoting function. The preparation method comprises the steps of taking straw substances at the soft part of the center of corn straw, and then drying the straw substances; cutting straw substances into long strips, then putting the long strips into a polar solvent to form a polar solution, and fully stirringand mixing; adding ceramic particles and a carbon oxide material into the polar solution, and fully stirring; then adding carbonyl metal into the polar solution, and fully stirring; and then carryingout pulping and papermaking, resin impregnation and carbonization in sequence, and finally acquiring the diffusion layer. Compared with metal, the straw substance adopted by the invention has betterinertness, so that the possibility of damaging a carbon skeleton is reduced in the carbonization process, and the overall permeability of the diffusion layer is ensured while the strength of the carbon paper is ensured.

The invention discloses an urban pipeline dredging machine and relates to the technical field of sanitation equipment. It includes a vehicle frame, the left and right sides of the vehicle frame are respectively provided with walking units, and the front side is provided with a chopping unit. The walking unit includes two main wheels, a transmission mechanism is arranged between the two main wheels, and one of the main wheels is connected with the driving device. The shredding unit includes a headstock, and the headstock is rotatably connected to the frame through a push rod, and a lifting cylinder is arranged between the frame and the headstock. A main shaft and a torque motor are arranged in parallel in the main shaft box, a first driven gear is fixedly arranged on the main shaft, and a first driving gear is arranged at the output end of the torque motor. Both ends of the main shaft are respectively provided with a tool holder shaft, and a blade is arranged on the tool holder shaft. The dredging machine can replace manual pipeline dredging, which not only reduces the risk of manual operation, but also improves the efficiency and effect of dredging.

The invention is suitable for the technical field of hydraulic engineering equipment, and provides a silt remover pipe head for hydraulic engineering design. Comprising a support housing; the absorption head is arranged in the supporting shell and used for absorbing sludge; a main adsorption opening used for adsorbing sludge is formed in the middle of the bottom of the absorption head, and a plurality of auxiliary inlets are formed in the outer side of the main adsorption opening in an array mode and used for absorbing aquatic plants; the mounting rods are arranged on the outer side of the absorption head in a circumferential array mode, and a plurality of crushing cutters are arranged on the mounting rods in an array mode; the mounting rod is mounted on the second gear ring, and the second gear ring is rotationally arranged in the supporting shell; the multiple crushing cutters intermittently extend out of the interior of the mounting rod in the rotating process; the swing rod is arranged on the absorption head in an intermittent swing mode, a scraping rod is arranged at the first end of the swing rod, the scraping rod is attached to the surface of the first filter screen, and the swing rod conveys aquatic plants on the surface of the first filter screen into the auxiliary inlet in the intermittent rotation process.

The present invention relates to the field of 3D printers, more specifically an anti-blocking nozzle for a continuous carbon fiber 3D printer, including an anti-blocking operating seat, a continuous adder, a heating nozzle, a regulator and a combined anti-blocking dredge, the continuous adder Fixedly connected and connected to the anti-blocking operation seat, the heating nozzle is connected and connected to the lower end of the anti-blocking operation seat through thread fit, the regulator is rotatably connected in the anti-blocking operation seat, and the combined anti-blocking dredger is clearance fit in the regulator, The combined anti-blocking dredger is longitudinally slidably connected to the anti-blocking operating seat; the beneficial effect of the present invention is that it can effectively dredge the printer nozzle pipeline blocked by the melted raw material; through manual adjustment, the dredging effect can be stably ensured while avoiding damage to the nozzle. Affect the service life; easy to operate, fast dredging.

The invention provides an elastic prestress duct dredging device. The elastic prestress duct dredging device comprises an elastic dredging device, a main cable type pull rod and an auxiliary cable type pull rod, wherein one end of the elastic dredging device is in screw joint with the auxiliary cable type pull rod, and the main cable type pull rod is inserted into the other end of the elastic dredging device; the elastic dredging device comprises a fixed guide cup and a free guide cup; a bidirectional connecting piece is fixedly assembled at the upper end of the fixed guide cup; two sets of inner bolt holes are in screw joint with one ends of high-strength spring steel sheets; a hollow duct is fixedly assembled at the lower end of the free guide cup; the auxiliary cable type pull rod is inscrew joint with the upper side of the bidirectional connecting piece; and the main cable type pull rod penetrates the hollow duct and is in screw joint with the lower side of the bidirectional connecting piece. Through the combination of the device, ducts with unlimited lengths, bent and variable cross sections can be cleaned in a single-end and two-end dredging manner. The elastic prestress duct dredging device does not damage the ducts, the aperture range is large, operation and maintenance are convenient, and practicability is high.

The invention discloses a pipeline dredging device. Through the device, one end of a carbon gun of a carbon powder pipeline is clamped, a ball valve is opened to input compressed air into the carbon powder pipeline, after a pressure gage displays that the pressure rises to the system pressure, the ball valve is closed, a pressing rod is pressed, pressure in the pipeline ejects an end cover open, carbon powder is brought out of the pipeline, the end cover is closed, the ball valve is opened, the compressed air is input again, and through repeated implementation of the above steps, the pipeline can be successfully dredged; through the device, the positive and negative pressure difference alternative dredging of any connecting point of the pipeline can be achieved, rapid loading and unloading and the carbon powder pipeline dredging work can be completed only through one person, the dredging efficiency and the success rate are improved, the shutdown overhauling time is shortened, the dredging effect and quality are ensured, involved parts are common spare parts in equipment management, the cost is low, material taking is convenient, mounting is convenient, detection is reliable, and maintaining is easy.

A horizontal underground culvert blockage dredging robot and its working method, including a traveling mechanism, a dredging body, a beating dredging mechanism, a high-pressure dredging mechanism, and a camera mechanism; the dredging body is arranged inside the walking mechanism, and the front end of the dredging body A high-pressure dredging mechanism is installed, which is connected to an external high-pressure water pump through a transmission line, and the high-pressure water pump is connected to an external water source. A camera mechanism is installed in the middle of the high-pressure dredging mechanism, and the camera mechanism is connected to an external host computer through a transmission line. The lower end of the dredging mechanism is also provided with a group of beating dredging mechanisms, and the rear end of the dredging body is provided with a driven walking mechanism; the invention allows the robot to walk in the culvert pipe by setting the walking mechanism, collects the influence in the culvert pipe through the camera mechanism, and transmits Go back to the host computer until the blockage point is found, and through the coordinated work of the beating dredging mechanism and the high-pressure dredging mechanism, the blockage will be cleared to complete the dredging of the culvert blockage.

The invention relates to the field of 3D printers, in particular to an anti-blocking spray head of a continuous carbon fiber 3D printer. The anti-blocking spray head comprises an anti-blocking operation base, a continuous adding device, a heating nozzle, an adjuster and a combined anti-blocking dredging device. The continuous adding device is fixedly connected and communicates with the anti-blocking operation base, the heating nozzle communicates with and is connected to the lower end of the anti-blocking operation base in a threaded fit mode, the adjuster is rotationally connected into the anti-blocking operation base, and the combined anti-blocking dredging device is arranged in the adjuster in a clearance fit mode and longitudinally connected to the anti-blocking operation base in a sliding mode. The anti-blocking spray head has the following beneficial effects that a printer nozzle pipeline blocked by molten raw material can be effectively dredged; through manual adjustment, the dredging effect is stably guaranteed, and meanwhile the nozzle is prevented from being damaged to affect the service life; and operation is convenient, and dredging speed is high.

A method for preparing a diffusion layer for a fuel cell, comprising the following steps: taking mature corn stalks, removing the outer skin of the corn stalks, taking the straw material at the soft center of the corn stalk, and then drying the straw material; Long strips, and then placed in a polar solvent to form a polar solution, fully stirred and mixed; adding ceramic particles and carbon oxide materials to the polar solution and fully stirred; then beating papermaking, impregnating resin, and carbonizing in sequence, Finally, a diffusion layer is obtained. In this application, the material in the center of corn stalks is used as a fibrous material, and then mixed with ceramic particles and carbon oxide materials under the action of a polar solution. The ceramic particles have a certain hydrophobicity and the ability to expand pores, ensuring this The dredging ability of the bit diffusion layer, and the use of carbon oxide materials is to increase its combination with the straw material and form a carbon skeleton.

The invention discloses cooling equipment for new energy automobile processing. The cooling equipment comprises a bottom shell, wherein a connecting heat-conducting shell is arranged on the outer side of the bottom shell, and a radiating finned tube is arranged above the bottom shell; a cooling processing seat is arranged at the top of the connecting heat-conducting shell, and a water tank is arranged on the side face, adjacent to the connecting heat-conducting shell, of the bottom shell; a connecting reinforcing piece is arranged above the water tank, and an injection water pump is arranged in the water tank; a backflow liquid pipe is arranged on the outer side of the connecting heat-conducting shell; and the bottom of the backflow liquid pipe communicates with the water tank. The invention relates to the technical field of new energy automobiles. According to the cooling equipment for new energy automobile machining, the purpose of cooling new energy automobile machining equipment is achieved, and the whole cooling equipment further has a good radiating effect when materials on the upper portion fall off; and when the whole cooling equipment works, the purpose of technical radiating can be achieved under the emergency condition.

The invention relates to a preparation method of a diffusion layer for a fuel cell. The method comprises the steps of taking corn straw after corn maturation, removing the outer skin of the corn straw, taking straw substances at the soft part of the center of the corn straw, and drying the straw substances; cutting straw substances into long strips, then putting the long strips into a polar solvent to form a polar solution, and fully stirring and mixing; adding ceramic particles and a carbon oxide material into the polar solution, and fully stirring; and then carrying out pulping and papermaking, resin impregnation and carbonization in sequence, and finally acquiring the diffusion layer. Materials in the center of the corn straw are used as fibrous materials for use; the fibrous materialsare mixed with the ceramic particles and the carbon oxide material under the action of the polar solution; the ceramic particles have certain hydrophobic capacity and also have the capacity of expanding pore channels; the dredging capacity of the diffusion layer is guaranteed, and the carbon oxide material is adopted to increase the combinability of the carbon oxide material and straw substances to form a carbon skeleton.

The invention discloses a drag suction unit assembly. The drag suction unit assembly is installed on a big arm mechanism of a dredging robot and comprises a drag suction spiral mechanism and big arm assembly coaxial-linkage mechanisms arranged on the two sides of the drag suction spiral mechanism, wherein the two ends of one side of the big arm mechanism are rotationally connected to the two sidesof the drag suction spiral mechanism through the big arm assembly coaxial-linkage mechanisms correspondingly, and the middle of the top face of the drag suction spiral mechanism is rotationally connected with the piston end of a drag suction head adjusting oil cylinder through an adjusting oil cylinder piston pin. According to the drag suction unit assembly, for overcoming existing equipment defects, a coaxially linked drag suction unit assembly capable of achieving multi-degree-of-freedom adjustment is designed, a drag suction spiral, the drag suction spiral mechanism and the big arm assembly coaxial-linkage mechanisms can move independently according to actual conditions in a pipeline and a box culvert, the working efficiency is greatly improved under the condition that the dredging effect is guaranteed, the risk of hydraulic oil leakage is avoided, the use effect is good, and the market prospect is wide.