245results about How to "Effective dredging" patented technology

A sewage purification pretreatment device, comprising a box body, a filter screen plate is horizontally arranged in the box body, sliders are fixedly installed at the left and right ends of the filter screen plate, slide grooves are longitudinally arranged on the left and right side walls of the box body, and the slide block Slidingly installed on the chute; fixed plates are symmetrically arranged on the left and right inner walls of the box body, and buffer springs are arranged between the fixed plate and the filter plate; the nozzle pipe is covered with a pipe sleeve, and the pipe sleeve is fixed at the bottom of the fixed plate. A flushing nozzle is installed at the upper end of the spray pipe; a connecting rod is provided at the left end of the telescopic hydraulic cylinder, a brush plate is fixedly installed at the left end of the connecting rod, and a brush is provided at the bottom of the brush plate; Cleaning the sundries attached to the screen plate can effectively dredge the mesh holes of the filter screen plate, and the flushing nozzle sprays water on the filter screen plate obliquely to realize the flushing of the filter mesh holes in the filter screen plate, effectively preventing the mesh The clogging of the sewage greatly improves the effect of sewage pretreatment.

The invention discloses a reverse circulation aerodynamic cavitation method for a coalbed methane well and equipment. The reverse circulation aerodynamic cavitation method comprises the following steps of: arranging wellhead equipment on a wellhead and sinking a working pipe to a bottom hole; clearly eliminating rock coal dust and water inside the well by using an air compressor in a circulating way; then lifting the working pipe upwards and injecting air / foam by using the air compressor and a supercharger, wherein the air injecting pressure is 3-15 MPa; meanwhile continuously injecting atomized water into the well with the water injecting amount of 3.0-5.0 m<3> each time; opening a hydraulic flat plate gate valve for discharging; after discharging, sinking the working pipe to a coalbed part; injecting the air simultaneously by the air compressor and the supercharger; meanwhile injecting water / foam with the amount of 3.0-10.0 m<3> by using an injection pump for washing the well to thebottom hole; after completing one cycle of discharging and well washing, detecting initial data; closing the air compressor, the supercharger, the injection pump and the hydraulic flat plate gate valve to enable gas inside the well to return freely; measuring the change of gas output of coalbed gas in one hour by using a flow meter; and placing a torch at a discharge port to ignite the gas. The invention improves the construction safety, improves the yield of single well coalbed gas, and saves the construction cost.

The invention belongs to the technical field of environmental geotechnics and discloses a river silt cleaning system. The river silt cleaning system comprises a carrier, a silt cleaning device, a mud making device and a mud storage device, wherein the silt cleaning device is fixed on the carrier and goes deep into a river silt seam to clean river silt; the mud making device is connected with the silt cleaning device, smashes the river silt and makes the river silt into mud; the mud storage device is connected with the mud making device and stores the mud. The river silt cleaning system is efficient, convenient, anti-clogging and low in pollution.

The invention relates to a sewage purifying pretreatment apparatus. The sewage purifying pretreatment apparatus comprises a casing, a filter screen plate is horizontally arranged in the casing, the slide blocks are fixedly arranged at left and right ends of the filter screen plate, the sliding grooves are vertically arranged on the left and right sidewalls of the casing, the slide blocks are arranged in the sliding grooves in a sliding mode; the fixed plates are symmetrically arranged on the left and right inner walls of the casing, a buffer spring is arranged between the fixed plate and the filter screen plate; a pipe sleeve is sleeved on a jet pipe, the pipe sleeve is fixed at the bottom of the fixed plate, a flushing nozzle is arranged at the upper end of the jet pipe; a connecting rod is arranged at the left end of a telescopic hydraulic cylinder, a brush plate is fixedly arranged at the left end of the connecting rod, and a hairbrush is arranged at the bottom of the brush plate. The filter screen plate performs preliminary filtering on sewage, the foreign materials attached on the filter screen plate can be cleaned by the brush plate, the meshes on the filter screen plate can be effectively dredged, the flushing nozzle is obliquely upward for spraying water to the filter screen plate, so that the meshes in the filter screen plate can be flushed, the mesh obstruction can be effectively prevented, and the sewage pretreatment effect is greatly increased.

The invention discloses a novel underground drainage pipeline sewage disposal device which comprises a cutting mechanism, a self-walking mechanism, a waterproof mechanism and a sewage disposal mechanism. The self-walking mechanism is arranged on the periphery of the cutting mechanism and externally provided with the waterproof mechanism. The sewage disposal mechanism is arranged at the end of the outer side of the waterproof mechanism. By means of the self-walking mechanism, the novel underground drainage pipeline sewage disposal device can go ahead in a pipeline in a creeping mode and cut and remove sewage in the pipeline in the walking process. Cutter heads and the walking mechanism are adjustable, and the requirement for different pipe diameters is met. The functions of cutting, sewage disposal and self-walking are achieved. Robot operation with water is achieved. The two hands of a worker can be relieved through a drainage pipeline mechanical device, manual interference is reduced, manual sewage disposal is replaced completely, worker safety is guaranteed, and the drainage pipeline is efficiently dredged.

The invention discloses a marine gas hydrate and mortar replacement exploitation method and device. According to the exploitation method, the sand blocking accuracy of a mechanical screen pipe is properly lowered to enable stratum mud and sand fine particles to flow into a shaft production pipe column and be discharged under the controllable condition, in the meantime, coarse-particle mortar is injected into a hydrate reservoir continuously, and through matching of a hydrate reservoir sand outlet management technology and mortar injection technology, replacement of the coarse-particle mortar and the stratum fine particles as well as the coarse-particle mortar and a hydrate space is achieved. The exploitation device comprises a production sleeve pipe, a production oil pipe, a shaft water injection pipe and a mortar back-injection pipe, the lower end of the production sleeve pipe is connected with the mechanical screen pipe, and the upper end and the lower end in the mechanical screen pipe are further provided with an upper mechanical packer and a lower mechanical packer correspondingly. The inlet end of the production oil pipe is provided with a gas separating device, and the position, above the upper mechanical packer, of the shaft water injection pipe communicates with the production oil pipe. The mortar back-injection pipe penetrates through the upper mechanical packer and the lower mechanical packer, extends to the bottom border of the production layer section of the hydrate reservoir and is connected with a gravel filling tool. Through the method and the device, the purpose of continuous and efficient production is achieved.

The invention relates to a scale prevention blocking remover for a ternary composite water dependent well. The scale prevention blocking remover comprises the following components in percentage by weight: 40-60% of polyether type macromolecular chelating agent, 10-30% of organic amine scale dissolving agent, 2-10% of emulsifier, 3-9% of stabilizer, 5% of strengthening agent and 15% of deionized water. The scale prevention blocking remover for the ternary composite water dependent well is capable of effectively removing calcium, magnesium, barium and strontium scale and prolonging the scale removal working cycle, has no corrosion on steel and iron and ensures the normal production of scaling oil (water) wells, so that the capacity of the oil (water) wells is recovered.

The present invention discloses a fertilizer additive for improving acidified soil. The fertilizer additive is prepared from the following raw materials by weight: 3-5 parts of smectite powder, 1-2 parts of peat soil, 1-3 parts of peat soil, 3-6 parts of silt, 5-10 parts of smashed deciduous leaf, 6-15 parts of pomegranate rind, 0.3-0.5 part of dicyandiamide, 0.1-0.2 part of thiourea, 10-12 parts of activated carbon, 40-45 parts of pomace, 3-5 parts of shell powder, 3-5 parts of calcium silicon powder, 1-2 parts of lignin, 0.1-0.2 part of an EM microbial agent, 0.1-0.2 part of Bacillus subtilis microbial agent, and 2-4 parts of a complex deodorant.

The invention provides an anti-blocking sink pipe device. The anti-blocking sink pipe device comprises a water drain pipe, an anti-blocking device, a dredging pipe, a dredging component and a drive component, wherein the water drain pipe comprises at least one downwards turning pipeline and an upwards turning pipeline, and is provided with a pipeline cavity which communicates the downwards turning pipeline and the upwards turning pipeline; the anti-blocking device comprises a shell provided with a control cavity; the dredging pipe aligns at the downwards turning pipeline, and communicates the control cavity with the pipeline cavity of the downwards turning pipeline; the dredging component is arranged in the dredging pipe in a sliding manner, and comprises a dredging wire group, and the dredging wire group faces the downwards turning pipeline for dredging the pipeline cavity of the downwards turning pipeline; the drive component is mounted in the control cavity and is operably connected with the dredging component, so that the dredging wire group rotatably moves towards the pipeline cavity, therefore, the blockage of the water drain pipe of a sink is effectively prevented, and the water drain pipe is smooth.

The invention discloses a self-adaptive pipeline dredging robot. The self-adaptive pipeline dredging robot comprises a circuit assembly, a drive assembly, a dredging assembly and a robot body. The drive assembly comprises telescopic rods, one drive wheel and two driven wheels, wherein the drive wheel and the driven wheels are fixed to the robot body through the telescopic rods. The dredging assembly comprises a water spraying pipe, a sludge pumping pipe, a reamer and a water outlet pipe, all of which are arranged on the robot body. The water spraying pipe is arranged at the head end of the robot body, and the water outlet pipe is arranged at the tail end of the robot body. The sludge pumping pipe and the reamer are arranged at the bottom of the robot body. The circuit assembly comprises amicrocontroller, a pressure sensor and a motor driver. The pressure sensor is arranged on the drive assembly, the microcontroller and the motor driver are arranged in the robot body, and the pressuresensor and the motor driver are connected with the microcontroller. By means of the self-adaptive pipeline dredging robot, efficient pipeline bottom sludge cleaning can be achieved, pipeline inner environment normalization is achieved, and the labor intensity of workers is relieved.

The invention provides a combined-type dredge ship. The combined-type dredge ship comprises a bow part and a stern part which are connected with each other; the bow part is connected with the stern part in a detachable manner. According to the technical scheme disclosed by the invention, a ship body adopting the detachable connection and electrical drive are adopted, so as to improve defects in traditional small-sized cutter suction dredgers; shallow draft of the ship body can be ensured, and the overall strength of the ship body can be ensured; therefore, the maximum digging width is greatly increased, so that dredging in a coastal zone and shallow tidal flats of inland rivers becomes more efficient, energy- saving, environment friendly and economical.

The invention discloses a river mud factorization solidification treatment method, and belongs to the technical field of river regulation. The method comprises the following steps of 1, mud collection, 2, solid and liquid separation and 3, mud and sand solidification. According to the technical scheme, river mud can be rapidly cleaned out and solidified through an efficient treatment device, so that a river is dredged efficiently, various excellent effects are obtained, the technical problems that the mud treatment cost is high in the existing river dredging process and the environment is affected in the mud and sand conveying process are solved, industrial operation can be achieved, and the method is widely applied to large-scale factorization mud treatment.

The invention discloses an operating mechanism of a bucket-wheel dredger and belongs to the technical field of ships. A bow crane is arranged at one end of a ship body. The bottom of the bow crane is movably arranged in a slide way. A check block is arranged in the slide way. The other end of the ship body is provided with a positioning column trolley. A cockpit is arranged on the ship body. A yield meter is arranged on one side of the cockpit. A bucket bridge is arranged below the other side of the cockpit. A bucket wheel is arranged at the end of the bucket bridge. An underwater dredge pump is arranged on the bucket bridge, an environment-friendly reamer is arranged in the bucket wheel, and one end of the bucket bridge is connected with a pivot gearbox. The operating mechanism is simple in structure, easy to operate and good in flexibility, the bow crane can freely move, the operating range is enlarged, the positioning column trolley with the better stability is adopted for ship positioning, dredging accuracy is effectively improved, and meanwhile working efficiency is improved.

The invention provides a device and method for dredging a gas production pipeline blocked due to freezing and belongs to the technical field of natural gas production. The device for dredging the gas production pipeline blocked due to freezing comprises a steam generator, wherein the steam generator comprises a generator body and a water supply device which is communicated with the generator body, and a steam delivery pipe is communicated with the generator body. The method for dredging the gas production pipeline blocked due to freezing comprises the following steps that a Christmas tree needle valve at the end of the gas production pipeline is dismantled; the end, away from the generator body, of the steam delivery pipe stretches into the gas production pipeline and is close to the portion blocked due to freezing; the steam generator is started, high-temperature steam generated by the steam generator reaches the portion blocked due to freezing through the steam delivery pipe, so that dredging is conducted through heating. According to the device and method for dredging the gas production pipeline blocked due to freezing, the portion, blocked due to freezing, of the gas production pipeline is heated within a short range by means of the high-temperature steam generated by the steam generator, so that the portion blocked due to freezing is unfrozen, in this way, the gas production pipeline can be dredged rapidly and effectively, and it is guaranteed that natural gas can be delivered smoothly in the gas production pipeline.

The invention discloses a water conservancy project water supply and drainage pipeline internal wall dredging device. The water conservancy project water supply and drainage pipeline internal wall dredging device comprises a pipeline and a mounting seat; a U-shaped frame is connected to the right side wall of the mounting seat; a first motor is connected to the right end of the U-shaped frame; a lead screw is connected to the left side output end of the first motor; a nut seat is screwed to the external wall of the lead screw; fixing rods are symmetrically connected to the upper and lower endsof the nut seat; guide sleeves are connected to the end parts of the fixing rods; the guide sleeves are movably arranged at the cross ends of the U-shaped frame in a sleeving manner; horizontal supporting rods are connected to the middle parts of the left ends of the fixing rods; the horizontal supporting rods run through the mounting seat; and a dredging shell is connected to one ends, extendinginto the cavity of the pipeline, of the horizontal supporting rods. The water conservancy project water supply and drainage pipeline internal wall dredging device has the advantages that the structural design is reasonable, the device is convenient for dredging works, the dredging efficiency is enhanced, the device is convenient for cleaning impurities out of the pipeline in a flowing manner, andthe dredging effect of the internal wall of the pipeline is further improved.

The invention relates to a cleaning and dredging device for an SCR (Selective Catalytic Reduction) catalyst pore. A supporting mechanism comprises a frame and lower supporting beams fixed at the bottom of the frame, wherein a drive shaft and a driven shaft which are respectively connected with the frame are arranged on two lateral plates of a box body through bearings, a motor arranged on the boxbody is connected with the drive shaft through a speed reducer, a catalyst unit is vertically arranged in the frame, at least two connecting beams on a top cover are connected with more than two cross beams and more than two longitudinal beams, two sides of the connecting beams are detachably arranged at the top of the frame through fastening members, regulating and limiting mechanisms are arranged on the joints of the top cover and catalysts, regulating members of the regulating and limiting mechanisms are connected with lower supporting plates and upper supporting plates, the lower supporting plates correspond to the joints of all groups of catalysts, cross limiting grooves at the tops of the upper supporting plates are connected with the cross beams and the longitudinal beams, and the lower part of the box body is also provided with a bubbling mechanism. The device provided by the invention has the advantages of reasonable structure, convenience for installation, capability of integrally cleaning the catalyst unit without crushing the catalysts, and capability of improving the cleaning efficiency.

The invention provides a pipeline dredging device for a concrete pump truck, comprising: a device body, a power mechanism, a drilling rig, chains and electric wires; the power structure is arranged inside the device body, and the drilling rig is arranged in the Outside the device body, the power mechanism provides power support for the drilling machine. The technical problem to be solved by the present invention is to provide a pipeline dredging device for concrete pump trucks that can truly and effectively clear pipeline blockages and further improve work efficiency.

The invention discloses a sludge hopper anti-blocking device for sludge drying treatment. The device comprises a drying machine and a material hopper fixedly arranged at the upper end of the drying machine, wherein the upper end of the material hopper is fixedly connected with a U-shaped plate, a driving motor is fixedly arranged at the upper end of the U-shaped plate, the output end of the driving motor is rotationally connected with a rotating rod through a coupler, the lower end of the rotating rod penetrates through the U-shaped plate and extends downwards, the rod wall of the rotating rodis rotationally connected with the U-shaped plate through a rolling bearing, a reciprocating lead screw is arranged below the rotating rod, a groove matched with the rotating rod is formed in the upper end of the reciprocating lead screw, the lower end of the rotating rod extends into the groove, two symmetrically-arranged sliding blocks are fixedly connected to the lower end of the rod wall of the rotating rod, sliding grooves matched with the sliding blocks are formed in the side wall of the groove, and the reciprocating lead screw is movably sleeved with a bush. With the device of the invention, sludge in the material hopper can be effectively stirred and dredged, so that sludge bridging and blocking in the material hopper can be avoided, and people can use the device conveniently.

The invention discloses a method for predicting road congestion based on taxi positioning, and belongs to the field of transportation. The technical problem to be solved by the invention is how to usethe taxi congestion to provide traffic management departments with vehicle congestion in the future road section so as to more reasonably arrange personnel and optimize the transportation plan. The technical scheme adopted is that the method comprises the steps of S1, constructing a taxi road operation record; S2, establishing a statistical database of the running speed of taxis at different times and different sections; S3, establishing a classification prediction model, that is to establish a decision tree model based on the database; and S4, forecasting and testing: predicting the congestion of the road at a specific moment through the decision tree model by using the taxi running record of a certain section of the road for one week, comparing with the actual congestion situation in the future, and optimizing the decision tree model according to the actual congestion situation to meet the acceptance criteria.

A portable detection device for blockage of an exposed filling pipeline comprises a C-shaped split ring, wherein the split ring is provided with a plurality of threaded mounting holes, and ultrasonicreceiving probes and ultrasonic resonance contacts are inserted into the mounting holes, are in sliding cooperation with the outer wall of the pipeline, and are respectively connected to an integratedcontroller. A dredging method for blockage of an exposed filling pipeline comprises the following steps of collecting reference data; determining the location of the blockage; and dredging the blockage: for the location of the blockage, using the resonance frequency of the corresponding filling material after curing, turning on the ultrasonic variable frequency vibration component and the ultrasonic vibration test component to continuously scan the outer wall of the pipeline at the blocked position, and breaking the solids in the pipeline until the pipeline is dredged. Requiring no other changes on the original pipeline system, the device and method can easily detect and dredge the blockage in the pipeline.

The invention discloses a fertilizer application shovel and belongs to the technical field of agricultural machinery. The fertilizer application shovel comprises a deep loosening shovel and a fertilizer application device, wherein the fertilizer application device comprises a fertilizer guide box and a uniform fertilizer application structure; an outer top wall of the fertilizer guide box is fixedat the lower side of a shovel edge part; an inner cavity of the fertilizer guide box is a fertilizer containing cavity; a fertilizer feeding opening, communicated with the fertilizer containing cavity, is formed in the rear end of the fertilizer guide box; more than one fertilizer application opening is formed in a part, close to a front end part, of the fertilizer containing cavity; the uniformfertilizer application structure comprises a scraping plate and a reciprocating motion mechanism; the scraping plate comprises at least one group of scraping teeth acting on fertilizer in the fertilizer containing cavity; the scraping plate is connected with an inner top wall of the fertilizer containing cavity through a sliding connection structure; the reciprocating motion mechanism comprises adriving motor, a speed reducer and an eccentric shaft; the driving motor is in transmission connection with the eccentric shaft through the speed reducer; the eccentric shaft is in transmission connection with a front end of a connection rod and the rear end of the connection rod is hinged to the front end of the scraping plate. The fertilizer application shovel disclosed by the invention can be used for effectively dredging the fertilizer containing cavity, preventing the fertilizer feeding opening from being blocked and ensuring uniform fertilizer application on soil.

The invention relates to the field of mechanical equipment, in particular to a closestool dredging device. The closestool dredging device comprises a fixing mechanism, a supporting mechanism, a dredging mechanism and a cleaning mechanism. A fixing frame I, a rotary shaft I, a rotary shaft II, a rotary shaft III, a rotating wheel I, a rotating wheel II, a driving chain I and a driving chain II are arranged on the fixing mechanism. The supporting mechanism is installed on the fixing mechanism, and the dredging mechanism is installed on the supporting mechanism. The complete dredging mechanism is designed for the closestool dredging device, the principle of reciprocating motion is adopted, the dredging mechanism formed by combining two rotating blocks and four connecting rods for reciprocating motion is designed, and a better effect is played during closestool dredging.

The invention provides a pipeline dredging machine. The pipeline dredging machine comprises a water pipe; a spraying head is connected with a water pipe; the spraying head comprises a shaft part and a spraying head side wall, wherein the shaft part is connected with the water pipe, and the spraying head side wall is arranged out of the shaft part and is provided with a hollow cylindrical shape; a rear spraying hole is formed in the shaft part of the spraying head and is used for pushing the spraying head to move forward; a side spraying hole is formed in the side wall of the spraying head and is used for cleaning, and the axis of the side spraying hole is perpendicular to the axis of the rear spraying hole; and a drilling bit capable of rotating is arranged on the forefront of the spraying head and plays a role in cutting a blocking body. According to the provided pipeline dredging machine, aiming at natural deposition dredging of a buried pipeline of an outdoor railway tunnel, calcium carbonate and silt precipitated by the natural environment can be effectively dredged, the maximum dredging length of the pipeline dredging machine is up to 50 m, and the pipeline dredging machine can pass smoothly at the corners not exceeding 90 degrees; appearance design of the pipe dredging machine conforms to requirements of the tunnel using environment, and stable working of the equipment can be ensured.

The invention discloses a fermentation fertilizer additive comprising sludge. The fermentation fertilizer additive is prepared from the following raw materials in parts by weight: 20-25 parts of rice hull, 10-12 parts of sludge, 1-4 parts of chitosan, 0.4-0.5 part of polyglutamic acid, 1-2 parts of humic acid, 10-15 parts of rice husk, 4-6 parts of herba artemisiae scopariae, 1-2 parts of artemisia apiacea, 1-2 parts of radix sophorae flavescentis, 2-3 parts of cornus officinalis, 3-4 parts of leftovers, 10-20 parts of chicken manure, 0.01-0.002 part of hexaammonium molybdate, 0.002-0.003 part of cobalt monosulfate heptahydrate, 0.5-1.8 parts of sodium acetate, 0.1-0.3 part of glycine betaine, 0.2-0.3 part of cupric acetate, 0.3-0.5 part of a modified fertilizer additive, 1-2 parts of a nitrification inhibitor DMPP and 1-2 parts of sodium dodecyl benzene sulfonate. According to the fermentation fertilizer additive comprising sludge, provided by the invention, hazardous substances contained in the sludge can be eliminated or killed after the sludge is radiated by ultraviolet rays, so that the effect of retaining nutrients and moisture by utilizing pores of the sludge can be achieved, and the sludge can be recycled to turn into wealth from waste.

The invention discloses a self-dredging closestool comprising a stool body, a lid arranged over the stool body and a water tank arranged on the back side of the stool body. a urinal and a drain pipe communicating the urinal and a drain port are disposed in the stool body; a dredging mechanism is further disposed in the stool body; the dredging mechanism has a vibrating motor arranged on a bend part of the drain pipe, an eccentric wheel fixedly connected with an output shaft of the vibrating motor and at least one connection rod, two ends of which are fixedly connected with the eccentric wheel and the outer wall of the drain pipe; and the drain pipe is a corrugated pipe. With collaboration and cooperation between the dredging mechanism, a cleaning mechanism and a disinfecting mechanism and a controller, the closestool can be unblocked, cleaned and disinfected in time; and the self-dredging closestool has great application value and promotion value.

The invention discloses an online blowing dust removal system. The online blowing dust removal system comprises a foreign matter removal machine bin, a screen arranged above the foreign matter removalmachine bin and used for screening dust and blades, a dust removal device arranged above the screen and used for dust absorption, a movable blowing device used for blowing the screen downwards, an adjusting device used for adjusting the dust absorption strength of the dust removal device, a detection device used for detecting the inner pressure of the foreign matter removal machine bin and a control device. The blowing device, the detection device and the adjusting device are connected with the control device. The control device is used for receiving pressure signals of the detection device,used for controlling adjusting operation of the adjusting device and used for controlling moving and blowing of the blowing device. By means of the system, the phenomenon that the dust removal screenis blocked can be effectively reduced, the device dust removal effect can be improved, the impurity removal effect of the foreign matter removal machine bin can be improved, and the online blowing dust removal system is simple in device structure and convenient to use and can be used and popularized; and in addition, the invention provides a control method applied to the above online blowing dustremoval system.

The invention discloses a lotion for soothing allergy and eliminating redness and a preparation method of the lotion. The lotion consists of the following components in formula: an extraction solution of Chinese traditional medicines, chamomile hydrosol, hyaluronic acid and the balance of distilled water, wherein the extraction solution of Chinese traditional medicines consists of the following raw materials in parts by weight: 2-5 parts of Yongchun fingered citron tea, 6-8 parts of safflower, 2-5 parts of ovate tylophora root and rhizome, 7-10 parts of peristrophe roxburghiana, 10-15 parts of a fresh purslane product, 12-16 parts of a fresh common beet product, 8-12 parts of a fresh aloe product, 1-3 parts of pericarpium canavaliae, 6-9 parts of raw radix astragalis, 5-7 parts of a fresh kochia scoparia product and 6-8 parts of bletilla striata. The lotion, when nourishing and moisturizing, can be used for effectively improving blood circulation in face, soothing allergy and promoting generation of new tissues and improving symptom of facial red blood silk; and the lotion is mild and non-irritant in formula, and the lotion is capable of effectively relieving and treating induced red blood silk.

A cutter head for dredging soil, which is mountable to the ladder of a suction dredger for dredging soil, and connectable on a suction pipe for removing loosened soil, the cutter head comprising a cage-shaped support construction which is mountable to a drivable rotation shaft extending mainly in extension of the ladder and which has a circumferential surface provided with a number of cutting tools for penetrating the soil, the cutting tools comprising a number of disc-shaped penetration bodies of which the disc planes extend substantially perpendicular to the rotation shaft, so that they can transfer forces to the soil via their peripheral edges.