57 results about "Sand separator" patented technology

The invention relates to the technical field of intelligent equipment monitoring, and discloses a sandstone separator monitoring control method and system based on multi-source data processing. According to the method, equipment operation parameters, real-time image data and vibration sensing data of the sandstone separator are collected in real time, data preprocessing and feature extraction are carried out, a monitoring model based on a multi-modal deep learning framework is constructed, and accurate joint characterization of the equipment state is achieved. The system can dynamically generate a control instruction according to a monitoring result, adjust equipment operation parameters in time, and avoid production interruption and quality problems. Besides, the multi-modal data fusion technology and the self-adaptive PID control algorithm are adopted, so that the operation efficiency and stability of the sandstone separator are further improved, and powerful technical support is provided for the field of intelligent manufacturing.

The invention relates to the technical field of sewage treatment, and discloses a slag-water separation sewage treatment recycling system which comprises a circulating water container and a cyclone desander, sewage is conveyed to the conical cyclone desander through a pneumatic diaphragm pump, and sand-water separation is achieved through high-speed cyclone; purified water enters the circulating water container for temporary storage through a top water outlet. The system adopts an integrated design, the cyclone desander operates independently, the complex structure of'container-in-container 'is avoided, and a closed loop of power, separation, slag storage and clear water recovery is formed. Circulating water can be directly supplied to high-pressure grinding equipment to be used, online recycling of water resources is achieved, and consumption of fresh water and discharge of waste water are reduced. The pneumatic diaphragm pump has the advantages of strong self-absorption, wear resistance, adjustable flow and the like, is suitable for conveying high-solid-content sewage, solves the problem that a traditional pump is easy to block and damage, and guarantees stable operation of a system. The system integrates efficient separation, water saving, environmental protection and long-term reliability, and is suitable for industrial sewage circulation treatment.

This invention discloses an air-lift cyclone sand separator, comprising a sedimentation tank and an air-lift device. The sedimentation tank has a sand-collecting hopper at its lower end, and a hollow shaft extending vertically is placed inside the sedimentation tank. A paddle is fixed to the lower end of the hollow shaft at the upper opening of the sand-collecting hopper. A driving device is fixed to the upper end of the sedimentation tank and connected to the upper end of the hollow shaft. The air-lift device includes an air-lift tank, an air-lift pipe, an air-purge pipe, and a sand-discharge pipe. The air-lift tank is housed within and communicates with the sand-collecting hopper. The air-lift pipe passes through the hollow shaft and communicates with the air-lift tank. The air-purge pipe passes through the hollow shaft and communicates with the sand-collecting hopper. The sand-discharge pipe passes through the hollow shaft and communicates with the air-lift tank. The paddle accelerates the rotation speed of the water flow in the sedimentation tank, allowing the sand to settle better. The settled sand is concentrated in the sand-discharge hopper. The air-lift pipe drives the water flow through the air-lift tank and into the sand-discharge pipe. The air-purge pipe disperses the sand in the sand-collecting hopper, allowing the dispersed sand to enter the sand-discharge pipe with the water flow, resulting in good sand removal efficiency.

An adjustable inlet assembly for a separator includes a nozzle positioned in an inlet of a cyclone housing. The adjustable inlet assembly also includes an inlet housing coupled to the cyclone housing and sealing therewith around the inlet. The adjustable inlet assembly also includes a movable rod disposed at least partially in the inlet housing. The movable rod is configured to move between a first position in which the movable rod at least partially obstructs fluid flow in the nozzle, and a second position in which the movable rod does not obstruct fluid flow in the nozzle.

A sand separator system is utilized in an artificial lift pumping system, where the sand separator system includes a perforated inlet, a separator casing coupled to the perforated inlet, a pump inlet tubing disposed through a central bore of the perforated inlet and forming an annulus with the separator casing, a helical auger component disposed at a distal end of the pump inlet tubing, and a spigot disposed downhole from the helical auger component. The spigot includes a head, a stem extending from the head, and a body portion coupled to a distal end of the stem and having fluid flow passages extending therethrough. The sand separator system is capable of removing at least 55% of the sand particles from a produced hydrocarbon fluid.

A cyclone separator for use with a well is disclosed. The cyclone separator includes a cyclone housing defining an internal chamber. A cyclone is at least partially positioned within the internal chamber and is configured to separate a mixed fluid. The cyclone separator further includes a first outlet connected to the cyclone housing, through which a substantial portion of solids from the mixed fluid may exit. The cyclone separator also includes a second outlet connected to the cyclone housing, through which a substantial portion of fluids from the mixed fluid may exit. Additionally, the cyclone separator includes an adjustable inlet assembly positioned between the cyclone and the well. The adjustable inlet assembly is selectively configurable between at least a first inlet configuration and a second inlet configuration for controlling fluid flow from the well into the cyclone based on one or more flow conditions from the well.

The utility model relates to the technical field of sand blasting, and discloses a stainless steel and common carbon steel component separating device which comprises a sand blasting room assembly, a control switch is fixedly installed on the front side of the sand blasting room assembly, a first conveyor is arranged below the sand blasting room assembly, a first driving motor is arranged on the front side of the first conveyor, and a second driving motor is arranged on the front side of the first conveyor. And a scraper cleaner is arranged at the lower end of the first conveyor. According to the stainless steel and common carbon steel component separating device, the two ends of the sand blasting room assembly are each provided with a medium storing and recycling device, and a first driving motor can be controlled to rotate forwards and backwards through a control switch so that a first conveyor can convey media leftwards or rightwards; a treatment medium automatically falls into a grating net plate and a collecting hopper of the sand blasting room assembly after being used, is conveyed to a second conveyor through a first conveyor below and is recycled to a first steel sand shot storage box through a first bucket elevator and a first shot-sand separator.

The present invention discloses an integrated water and sediment separation device for the Yellow River water, which includes a flocculant adder, a booster pump, and a water and sediment separator. Among them, the water and sediment separator includes a housing, a water inlet, filter media, a sediment separator, a drain outlet, a sediment discharge port, a pumping pipe, a pumping pump connected to the pumping pipe, a filter media washing pool arranged above the housing, a stirring tank, a floc discharge pipe, and a sediment discharge port. Among them, the particle size of the filter media is larger than the particle size of the sediment in the Yellow River water. The present invention filters the microbial colloid and flocs in the Yellow River water through the filter media, separates the sediment in the Yellow River water through the setting of the sediment separator, realizes the treatment of the Yellow River water to meet the requirements of drip irrigation. At the same time, through the setting of the pumping pipe, the pumping pump, the filter media washing pool, etc., the repeated recycling of the filter media is realized, reducing the cost of the Yellow River water treatment, and also improving the treatment efficiency and quality, providing guarantee for the drip irrigation of the Yellow River water.

A sand separator system is utilized in an artificial lift pumping system, where the sand separator system includes a perforated inlet, a separator casing coupled to the perforated inlet, a pump inlet tubing disposed through a central bore of the perforated inlet and forming an annulus with the separator casing, a helical auger component disposed at a distal end of the pump inlet tubing, and a spigot disposed downhole from the helical auger component. The spigot includes a head, a stem extending from the head, and a body portion coupled to a distal end of the stem and having fluid flow passages extending therethrough. The sand separator system is capable of removing at least 55% of the sand particles from a produced hydrocarbon fluid.

The utility model discloses a quartz sand high-temperature chlorination purification device, which comprises a heating furnace body and a sand separator, at least one cylindrical cavity is arranged in the heating furnace body, the upper end side of the cylindrical cavity is provided with a feed port, the lower end side of the cylindrical cavity is provided with a discharge port, and the two end sides of the cylindrical cavity are respectively provided with an air inlet and an air outlet; the sand separator is arranged in the cylindrical cavity and comprises a main body supporting column which is coaxial with the cylindrical cavity and a plurality of sand separating bodies which are arranged at intervals layer by layer in the axis direction of the main body supporting column; the sand separating bodies comprise sand separating columns which are arranged in the circumferential direction of the main body supporting column in a radiation mode at equal interval angles, and the sand separating columns of any two adjacent layers of sand separating bodies are arranged in a staggered mode so that quartz sand falling into the cylindrical cavity from the feeding opening can sequentially pass through the intervals of the sand separating columns on the sand separating bodies and fall to the discharging opening. The contact area of the quartz sand and the reaction gas is increased, and the purification effect is favorably improved.

The utility model discloses a shot-sand separator for a shot blasting machine, which comprises an outer box body, an inner box body, a cleaning component for improving the separation effect and a dust falling component for treating dust, the sweeping component comprises a rotating shaft connected with the top of the outer box body, a motor connected with the top of the rotating shaft, a main gear connected with the outer side of the rotating shaft, a driven gear connected with the outer side of the inner box body, a driving wheel fixedly connected with the outer side of the rotating shaft and a support fixedly connected with the top of the outer box body. Through the arrangement of the outer box body, the inner box body, the cleaning part and the dust falling part, the shot-sand separator solves the problems that when an existing shot-sand separator is used, although shot-sand can be separated, dust is prone to being left on the outer sides of shots to burn on sand during separation, the separation effect becomes poor, a draught fan is used for direct extraction, and the cost is low. And shot sand easily enters a fan to damage the fan, so that the practicability is reduced.

A kind of concrete resource recycling building, including recycling main building, ingredient system being arranged in one side of recycling main building, dust removal system being arranged in the other side of recycling main building and opposite ingredient system, raw material lifting system being arranged in the side of recycling main building and crushing screening system being arranged on recycling main building, recycling main building includes main building frame, and main building frame includes first platform, second platform, third platform, fourth platform and fifth platform being sequentially connected and arranged;Crushing screening system includes crusher being arranged on fourth platform, grading screen being connected with crusher and arranged on third platform, screening discharge pipe being arranged on second platform, fine sand separator being connected with screening discharge pipe and arranged on first platform, first specific gravity machine and second specific gravity machine being respectively connected with screening discharge pipe and arranged on first platform, resource recycling building defined in the application greatly reduces the powder content in concrete recycled material, improves the quality of regenerated material, realizes the full utilization of concrete resource recycling.

The utility model relates to the technical field of sandstone processing equipment, and discloses a feeding anti-blocking sandstone separator which comprises a feeding barrel, a first motor is fixedly connected to the interior of a motor box, a filtering turnover frame is arranged in the feeding barrel, a sandstone outlet is formed in the feeding barrel, and the filtering turnover frame is connected with a second motor. A second motor is fixedly connected to the upper surface of the motor base, and a screen is arranged in the square frame. The vibrating screen has the following advantages and effects that the first motor is started to drive the filtering turnover frame to rotate in the feeding barrel, the second motor is started to drive the vibrating circular ring to rotate deviating from the circle center through the eccentric shaft, and the square frame drives the screen to shake back and forth under the combined action of the spring assembly; and large stones are discharged out of the feeding barrel through the gravel outlet, coarse gravels are screened into fine sand under the action of the shaking screen, and the good anti-blocking effect is achieved through the operation.

A system for weight measurement of solids in a flow stream. The system collects the solids from the flow stream in a recipient that is slidably mounted within a pressurized accumulator vessel, which is pressurized with a variable pressure due to the flow stream. A recipient stem connects the weight of the recipient to a load cell. A force on the recipient stem includes both the force of the weight of the solids and a force produced by the variable pressure acting on the cross-sectional area of the recipient stem. The variable pressure is also applied to a compensating stem to produce a compensation force that is used to cancel out the force acting on the recipient stem due to the variable pressure.

The utility model relates to oil -gas separator technical field especially relates to a kind of downhole oil-gas sand separator. Including shell, the inside joint cover of shell is connected, the inside sliding connection of joint cover has press block, the outer wall fixed connection of press block has slide column, the outer wall of slide column is provided with first spring, the inside of shell is provided with sand settling tail pipe, the outer wall fixed connection of sand settling tail pipe has cyclone, the inside of cyclone is provided with tangential inlet, the outer wall fixed connection of cyclone has overflow pipe, the outer wall of overflow pipe is connected with fixed block, the outer wall fixed connection of fixed block has separation cylinder, the inside of shell is provided with mounting assembly. The utility model provides a kind of downhole oil-gas sand separator, by press block can drive slide column to slide in the inside of joint cover, first spring is driven to compress simultaneously, at this time, by driving joint cover to slide out the inside of shell reaches the effect of removing separator, to reach the effect of being convenient for installation to separator.

The application discloses a complete set of equipment for preparing engineering slag soil regenerated sand by a dry method. The equipment comprises a soil pulverizer, a drying device, a mud-sand separator, a screening machine and a conveyor. The soil pulverizer is used for initially scattering the engineering slag soil; the drying device is used for drying the initially scattered engineering slag soil; the mud-sand separator is used for separating sand particles and residual mud in the dried engineering slag soil; and the screening machine is used for screening out the residual mud in the sand particles to obtain the engineering slag soil regenerated sand. The application solves the technical problem that the prior art cannot continuously prepare the engineering slag soil regenerated sand by the dry method, significantly improves the yield and efficiency of the dry preparation of the engineering slag soil regenerated sand, and lays a solid foundation for subsequent large-scale application of the engineering slag soil regenerated sand prepared by the dry method in engineering. The mud content of the engineering slag soil regenerated sand prepared by the application is significantly reduced, and accordingly, the application amount of the engineering slag soil regenerated sand in concrete and cement mortar can be further improved.

This utility model provides a high-efficiency cyclone sand separator for natural gas. It relates to the technical field of natural gas processing equipment and includes a shell, a top cover, an inlet pipe, an overflow pipe, a wear-resistant liner, a sand collection tank, a storage component, a sand cleaning component, a snap-fit ​​limiting component, and a support frame. The support frame is fixedly mounted on the shell. The inlet pipe is fixedly mounted on the shell and extends tangentially into the shell. The wear-resistant liner is snap-fitted into the shell and has through holes adapted to the inlet pipe. The top cover is detachably and sealingly mounted on the top of the shell. The snap-fit ​​limiting component is located on the top cover and connected to the shell. The overflow pipe is fixedly mounted on the top cover in a central position. This utility model has a reasonable design, achieving the goals of high-efficiency sand removal, low maintenance frequency, and stable operation, providing a reliable solution for impurity treatment during natural gas transportation.

The utility model discloses a kind of water-sand separator grading filter devices, relate to water-sand separator field.The utility model includes filter device, the filter device includes separation bin, water inlet and first water outlet are respectively set in separation bin two ends, by setting arc flow guide seat, aeration nozzle, grading filter screen and twist cage etc., wherein arc flow guide seat carries out flow guide to the water-sand mixed liquid of entering separation bin, changes water flow direction and speed, sand particle is more easily settled under water flow action, aeration nozzle is connected with aeration pump by gas pipe interface, injects bubble into separation bin, bubble rises and drives water flow to tumble, further promote sand particle and water separation, while liquid medicine pipe interface connects external flocculating agent medicine tank, flocculating agent is evenly sprayed into separation bin by aeration nozzle, solve the problem that a large number of sand cannot be promptly and effectively precipitated due to the arc flow guide plate of traditional water-sand separator at water inlet, affect the whole water-sand separation system processing effect and the problem of operating stability.

The invention relates to a pile foundation pore-forming slurry construction method suitable for a phyllite stratum, and belongs to the technical field of phyllite stratum slurry construction. Sodium carbonate is accurately proportioned to adjust the pH value so as to inhibit rock stratum hydrolysis, bentonite is matched to improve the colloid rate so as to form a compact slurry cake, polyanionic cellulose is introduced as an intelligent conditioning agent, and the pile foundation pore-forming slurry construction method suitable for the phyllite stratum is prepared. The molecular chain structure can form a three-dimensional network to enhance the wall protection effect when a stratum is broken, construction sections are divided according to the integrity of the stratum, a basic formula is adopted for stabilizing the stratum to ensure the hole forming efficiency, a cellulose additive is actively activated in a broken zone to form viscoelastic fluid, and then through combined purification of a positive circulation system and a sediment separator, the construction efficiency is improved. The sand content is strictly controlled, the mud suspension force and the stratum seepage pressure are dynamically balanced in cooperation with specific gravity adjustment, and the problem that the mud performance of the phyllite stratum is dynamically matched with the geological conditions is systematically solved through a synergistic mechanism of formula optimization, staged application, circulating purification and dynamic regulation and control.

This utility model discloses a two-stage integrated sand remover, comprising a main shell with a hollow channel and an air inlet and outlet on its side. A filter cartridge is positioned at the upper part of the hollow channel, and an axial-flow hydrocyclone is positioned at the lower part. A cyclone inlet chamber, connected to the air inlet, is located at the lower part of the hollow channel of the main shell. A cyclone outer cylinder is fixedly connected to the lower end of the cyclone inlet chamber with a reduced diameter. The axial-flow hydrocyclone is positioned inside the cyclone outer cylinder and has several swirl vanes on its outer circumference. An anti-winding seat is positioned directly below the axial-flow hydrocyclone at the bottom of the cyclone outer cylinder. A through-hole in the middle of the axial-flow hydrocyclone extends upward through a first seamless steel pipe into the inner hole of the filter cartridge, with the horizontal position of the outlet of the first seamless steel pipe higher than the horizontal position of the air outlet. This utility model reduces production costs and floor space, improves sand removal efficiency and effect, and reduces the frequency of filter cartridge maintenance by on-site personnel.

The sand separation device comprises a sand blasting machine body, a sand separator used for storing sand is arranged on the sand blasting machine body, a vibration assembly is arranged on the sand separator and comprises a pneumatic vibrator arranged on the outer surface of the sand separator, and the pneumatic vibrator is connected with an air source through an air control pipeline. The sand blasting device has the effect of improving the sand blasting quality of the sand blasting machine.

The utility model discloses an integrated environment-friendly circulating slurry purification system which comprises an initial slurry pool, a first slurry pump, a second slurry pump, a circulating water tank, a circulating water tank and a circulating water tank, wherein the initial slurry pool is formed by driving a steel casing into the ground; the silt separator is used for treating the slurry pumped out by the first slurry pump and preliminarily separating out coarse slurry and gravel; the slurry box mechanism comprises at least two slurry boxes, a slurry inlet pipe is arranged at the bottom of the foremost slurry box, coarse slurry separated by the silt separator is introduced through the slurry inlet pipe, a second slurry pump is arranged at the bottom of the rearmost slurry box, and the slurry boxes are communicated through a water passing pipe arranged on the upper portions of the slurry boxes; and the slag collecting box is arranged on one side of the silt separator and is used for storing the sand separated by the silt separator. The mud pit can be machined in advance and assembled on a construction site, so that the construction cost is reduced, and the construction period is shortened.

The utility model discloses a sand separator which comprises a base, an upper inclined hopper, a screen body, a speed reducer and a lower inclined hopper, wherein the upper inclined hopper, the screen body, the speed reducer and the lower inclined hopper are arranged on the base; a first fixing frame and a second fixing frame are arranged on the base; the screen body comprises a rotating shaft, a plurality of fixing supports and a screen mesh. The side, close to the first end, of the screen body communicates with an outlet of the upper inclined hopper. The second end part is rotationally connected to the second fixing frame and is connected with the speed reducer; the side, close to the second end, of the screen body communicates with an inlet of the lower inclined hopper. The first end portion is higher than the second end portion. The speed reducer drives the screen body to rotate, and the first end part is higher than the second end part, so that liquid in slurry water entering the screen body through the upper inclined hopper penetrates through the screen to flow out, the screening efficiency is improved through continuous rotation of the screen body, the phenomenon that the screen is blocked by accumulated fine sand is avoided, and finally the screened fine sand is discharged through the lower inclined hopper. Fine sand is convenient to collect, the whole structure is simple, and cost is low.

The utility model provides a cat litter basin, which relates to the technical field of pet supplies and comprises a base, a roller component and a packing device. The excrement collecting bin is used for containing a packaging bag. The roller assembly is mounted in the first mounting groove and rotates relative to the base, a sand separation part is arranged in the roller assembly, a first opening is formed in the side, close to the excrement collecting bin, of the roller assembly, the sand separation part extends to the position of the first opening, and the roller assembly communicates with the excrement collecting bin through the first opening. The packing device corresponds to the excrement collecting bin, the heating piece is connected with the cutting piece, and the sealing assembly moves relative to the cutting piece and can abut against or be away from the cutting piece. The heating piece heats the cut-off piece to increase the temperature of the cut-off piece, the sealing assembly drives the packaging bag to abut against the cut-off piece to automatically cut off the connecting portion of the packaging bag, then the cutting-off efficiency of the packaging bag is improved, the situation that a user needs to tear the packaging bag with hands is reduced, pet toilet cleaning is facilitated, and the pet toilet cleaning efficiency is improved. And the user experience is improved.

This utility model discloses a cyclone-type sediment separator, including a base and a separator body. A fixed frame is symmetrically fixed to one side of the top of the base. A first motor is fixed to one side of the top of each fixed frame. A first threaded rod is fixedly connected to the output end of the first motor. A first moving block is threadedly connected to the outer side of the first threaded rod. A second motor is fixed to one side of the top of the first moving block. A rotating rod is fixedly connected to the output end of the second motor. A stirring blade is fixedly connected to the outer side of the rotating rod. A feed inlet is fixedly connected to one side of the separator body. By setting a second gear and starting a third motor, the second gear can be driven to rotate. The first gear meshes with the second gear, driving the first gear to rotate, thereby driving the separator body to rotate and allowing it to be rotated to a suitable position for easy internal cleaning.

The utility model discloses a kind of rice steaming and cooking assembly lines, belong to food processing equipment technical field;Including sequentially connected feeding assembly, cleaning assembly, conveying assembly and steaming and cooking assembly.Letting-out pipe is equipped in feeding assembly, for quantitative feeding rice material to cleaning assembly;Cleaning assembly includes rice washing barrel and storage barrel, storage barrel is located above rice washing barrel, sand separator is connected between the two, for removing sand and stone impurities in rice material conveying process;Conveying assembly includes conveying belt and transfer hopper, transfer hopper is located directly below storage barrel outlet, for receiving the rice material after cleaning and conveying it to steaming and cooking assembly entrance;Steaming and cooking assembly includes steaming and cooking frame and multilayer guide net belt, can realize the continuous steaming and cooking of rice;The utility model realizes the full automation operation from feeding, cleaning, conveying to steaming and cooking discharge, compact structure, high production efficiency, and have effective sand and stone separation function, ensure the purity of rice.

The invention is suitable for the technical field of fluid machinery, and provides an underwater solid-liquid two-phase sediment characteristic particle size separation and collection device which comprises a fine sand separator used for separating and treating sediment, and a feeding hopper is fixedly installed at the feeding end of the fine sand separator through bolts; the sand guiding device is used for guiding to-be-separated silt; the discharging pipe is fixedly communicated with the discharging end of the fine sand separator, the discharging pipe is connected with a slurry pump to pump slurry after sand separation, and the discharging end of the slurry pump is communicated with a collecting bin through a material guiding pipe; and the separating mechanism is arranged on the fine sand separator and is used for separating silt. According to the underwater solid-liquid two-phase sediment characteristic particle size separation and collection device provided by the scheme, the problems that existing equipment is difficult to meet large-scale underwater operation and the fine sand separation treatment effect is not ideal are solved.

1. Name of the product in this design: Filter-type cyclone sand separator (3). 2. Application of this design: This design is intended for use in sand separators. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

This invention relates to the field of oil manifold technology, and more specifically to a throttling and kill manifold with sand control function; it includes a manifold platform, which is connected to a tail-end manifold platform via pipes. Both the manifold platform and the tail-end manifold platform are equipped with gate valves for throttling control. The upper end of the manifold platform is connected to an upper control panel via multiple branch pipes. By controlling the sand separator on the upper control panel, the medium in the branched pipes is filtered for sand. A gate valve is installed on the side of the manifold platform, which divides the pipes inside the manifold platform into two areas. The beneficial effect of this invention is to solve the problem that newly extracted and transported oil often carries a large amount of sand and gravel from the excavation process, and that some of this sand and gravel needs to be partially removed during transportation.

The sand storage tank comprises an upper tank barrel, a lower tank barrel and a pressure pump, the bottom of the upper tank barrel is connected with the lower tank barrel through a bolt, the bottom of the lower tank barrel is connected with the pressure pump through a pipeline, an opening and closing valve is arranged at the joint of the lower tank barrel and the pipeline, and a supporting frame is arranged on the upper portion in the upper tank barrel. The upper part of the support frame is provided with a dispersion assembly with a conical-column-shaped structure, so that the unscrewed gravel and sundries are brought out of the water outlet again under the combined action of centripetal force, buoyancy and fluid drag force, slide out through the blocking action of the dispersion assembly and the circumferential dispersion of the dispersion assembly, and then slide out through the acceleration of the spiral dredging plate and are collected into the lower tank barrel; the problems that the falling speed is low and falling scattering is not concentrated are solved, and the technical effect that gravel and sundries can be collected into the lower tank barrel through rotational flow conveying of the spiral dredging plate is achieved.