206results about How to "Reduce the likelihood of clogging" patented technology

The present invention provides a method for gravel packing a open-hole wellbore having a filter cake, comprising pumping a gravel slurry into a first portion of an annulus between the wellbore and a screen, at a sufficient rate and pressure to form at least a first fracture and diverting the gravel slurry to a second portion of said annulus through alternate flowpaths while providing hydraulic isolation between the first and the second portion of said interval, thereby preventing flowback from said second portion to said first portion and resulting extension of the first fracture, and thereby forming a second fracture in said second portion of said interval.

A method for removing impurities from an aqueous mixture or purified aqueous by extracting the aqueous mixture or purified aqueous mixture with an extraction solvent in an extraction zone to form an extract stream and the raffinate stream; and optionally separating the extract stream and a solvent rich stream in a separation zone to form a high boiling point organic impurities stream and a recovered extraction solvent stream.

The invention relates to a routing calculation, core selection, spectrum allocation method and system based on cross-talk perception, which are designed to solve the cross-talk problem of adjacent cores in a multi-core optical network. The routing calculation, core selection, spectrum allocation method based on cross-talk perception includes the following steps: calculating the working path for each connection request, and carrying out core selection according to the connection request classification principle; searching for and allocating spectrum resources on the working paths of the connection requests according to the constraints of spectrum continuity and spectrum consistency and the -talk threshold constraints, and establishing connection requests in a spectrum flexible optical network; and calculating the spectrum utilization rate and connection request blocking rate of the network according to the status of spectrum resource occupied by each fiber link. According to the invention, the cross-talk value of connection requests is reduced, the network spectrum resources are made more regular, and thus, the efficiency of the network spectrum resources is improved.

This invention relates to waste-water treatment process by using batch-type aerobic granular sludge membrane reactor. The procedures are: influent of domestic sewage being fed-in, aeration, intermittent drainage, settlement, drainage and reflux. This invention method makes the sludge in the reactor being of granulated. The whole system proceeds, periodically, aerobic, anaerobic and facultative aerobic condition treatment; so, it can remove carbon-containing organic pollutants, and also nitrogen and phosphorus nutritive elements and the like. This inventive method is used for treatment of urban domestic sewage, with COD removal rate being up to more than 95%, the ammonia-nitrogen being kept less than 1mg / L, total nitrogen and total phosphorus removal rate being more than 90% and 45% respectively. This invention method reduces, obviously, membrane contamination, lowers the speed of reducing rate of membrane-flux by 50%. And the membrane-flux can be recovered to original condition just by hydraulic washing. The inventive method can produce excellent economic benefit and environmental benefit.

A gas restrictor particularly useful for application in gas bearings as used, for example, in free-piston Stirling cycle machinery. Porous strip material (52) together with a backing plate (60) and orifice (32) is used to provide the restriction to the flow of gas into an annular gap (22) between a piston (16) and a cylinder (12).

The invention provides a sponge city construction road rainwater treatment system, which comprises a water seepage road surface, a soil-stone mixing layer, a concrete layer and a base soil layer. Theconcrete layer forms openings at downward concave parts; gravel layers are arranged on the opening parts; each opening is connected with a collecting pipe; a water distributor, a clear water chamber and a water storage chamber are arranged in the base oil layer; the collecting pipe is communicated with the water distributor; a filtering structure is arranged above the clear water chamber, and comprises a first filtering chamber and a second filtering chamber; a first channel and a second channel are arranged in the water distributor; the second filtering chamber comprises a water distributionplate and a circle levee which are arranged at an interval; a filter cloth is arranged between the circle levee and the water distribution plate; an overflow port is formed in a side wall of the circle levee; a filtering layer is arranged on the bottom part of the first filtering chamber; the clear water chamber is located under the filtering layer; a drainage hole is formed in the first filteringchamber and is communicated with the water storage chamber through a drainage pipe; a control mechanism for controlling the first channel or the second channel to open and close is arranged on the water distributor. According to the scheme, rainwater can be collected, purified and stored for users to use.

The invention discloses a reducing-melting method for making iron containing coal balls, comprising steps of mixing iron powdered ores, coal dust and binder in certain proportion, and pressing the mixture into coal balls containing iron with a ball press; baking and drying the prepared coal balls containing iron at high temperature, and then reducing to generate metal balls containing iron; thermally filling the reduced metal balls containing iron into a melting reducing furnace, at the same time, filling cokes and fusing agent, so as to reduce and melt the metal balls in the melting reducing furnace into liquid scrap iron which is discharged out from an iron port. The invention is characterized in that: ball making, drying, reducing and melting in the furnace at high temperature are integrated; as the coal balls are directly filled in the melting reducing furnace thermally, energy utilization is improved, energy consumption is reduced, the metal balls are prevented from expanding in the furnace at high temperature, only metal balls are generated during reducing period, the probability of having bonding and of plugging pipelines is greatly reduced, thus utilization rate of equipment is improved.

The invention discloses a CART-based decision-making tree construction method in cognitive computation. The method comprises the following steps: initializing a root node of a decision-making tree and a characteristic attribute set corresponding to the root node according to establishment rules of the decision-making tree; carrying out sorting of data in a training set; judging whether all sample data in a node is of the same type or not; calculating the optimum characteristic attributes and the suboptimum characteristic attributes of the node to be split; judging whether the node satisfies the selected optimum splitting attributes and splitting conditions of an interruption mechanism or not; if the node satisfies the selected optimum splitting attributes and the splitting conditions of the interruption mechanism, carrying out splitting through the optimum splitting attributes, then iteratively replacing a current node with the node split through the characteristic attributes, and adding two new leaf nodes respectively from a left branch and a right branch, so as to achieve automatic splitting of the decision-making tree; and if the node does not satisfy the selected optimum splitting attributes or the splitting conditions of the interruption mechanism, waiting for data stream inputs, carrying out sample updating, and continuing to calculate node splitting. The method provided by the invention has the advantages that the accuracy of data stream processing is further improved, so that the possibility of system blocking is reduced.

The invention discloses a mixed flow non-sunken bioretention pond having an initial rainwater discarding function. The retention pond comprises a bottom and sidewalls, and the retention pond is composed of three parts, namely an initial rainwater discarding and distributing well (10), a retention pond main body (20) and overflow and outflow water collecting well (30). Effective discarding and separating of initial rainwater can be achieved, and runoff pollution can be effectively controlled; a requirement on sinking downwards can be avoided, particulate pollutants in runoff entering facilitiescan be effectively relieved, the possibility that the bioretention pond gets blocked can be obviously reduced and efficient running of the facilities for a long term can be guaranteed; and through amixed flow mode combining 'upwards flowing and downwards flowing', overflowing paths of the runoff in the facilities are increased, and a control effect of the facilities over runoff pollution is obviously improved.

The invention discloses to a control system for a mine electric wheel dump truck by using fieldbus technology, which relates to electronic control on vehicles. The control system comprises a fieldbus controller and devices for electric wheel trucks on the bus, which are controlled by the fieldbus controller, wherein the fieldbus controller comprises a main controller and one or a plurality of subcontrollers; the main controller is used for acquiring driving signals and controlling the power system; and the subcontrollers are used for acquiring other operation signals and controlling the auxiliary electrical system and hydraulic system; and the main controller and subcontrollers communicate information through the bus and transmit the data to be displayed to the display screen and meters. The invention solves the problem of long and complicated entire truck route caused by the traditional wiring mode; the devices can be installed in flexible positions; the vehicle power unit has the advantages of high response speed and high control accuracy; the fiber is used as the transmission medium of the heavy-current power control bus, thereby avoiding electromagnetic interference and ensuring data transmission accuracy; and multiple network buses are utilized to avoid busyness and enhance safety.

The invention discloses equipment for deep-hole drilling through vibrating. The equipment comprises an upright which is horizontally provided with a crossbeam through a guide rail, an oiling device is fixedly arranged at one end of the crossbeam, a vibrating spindle box is arranged at the other end of the crossbeam, a hollow cutter bar is horizontally arranged at one end of the vibrating spindle box and penetrates out of the oiling device, and a chip removal pipe is arranged at the other end of the vibrating spindle box. By the equipment, the problem that existing deep-hole processing equipment through cutter rotation is unreliable in chip breaking and removing, poor in quality of hole processing and low in processing efficiency is solved, and deep-hole processing quality is improved.

A projectile-loading assembly (1) for an air-powered gun is configured to load projectiles (3) in a barrel (4) and includes a magazine module (10) and a slider module (20). The magazine module (10) includes a projectile chamber (11), a rail tube (14) located over the projectile chamber (11) to be aligned with the barrel (4), and a projectile-loading block (15) sheathed the rail tube (14). The slider module (20) slides with respect to the barrel (4) and includes: a spring (21) for pushing the projectile-loading block (15) to depart from the barrel (4), and an elastic piece (22) for pushing the projectile-loading block (15) to approach the barrel (4). The elastic piece (22) pushes the projectile-loading block (15) to slide toward the barrel (4) when the slider module (20) slides forwards, thereby pushing one projectile (3) into the barrel (4) while closing the projectile chamber (11).

The invention discloses a single-magnet combined type treatment melting ball for oily sewage, and belongs to the field of sewage treatment. According to the scheme, the sewage treatment melting ballsare put into ther oily sewage, a pre-dissolving layer is promoted to be gradually dissolved under the action of the sewage, calcium oxide powder balls in the pre-dissolving layer are promoted to be incontact with the sewage and react with the sewage, and the dissolving efficiency of oil stains can be greatly improved by means of generated heat and generated calcium hydroxide; meanwhile, by meansof gradual consumption of the calcium oxide powder balls, elastic metal arc strips in the treatment melting balls can be promoted to be unfolded to be arc-shaped under the repulsive action of magnet balls and combined with other elastic metal arc strips to form various magnetic attraction rings with different sizes, and connecting metal ropes are promoted to recover to the high-temperature phase state by means of temperature rise; therefore, the magnetic attraction rings are forced to move under the magnetic attraction effect, and the adsorption effect on particles in the sewage is improved.

A linear actuator (10) comprising: - a rotatory input shaft (13) driven by an electric motor having a helical threaded zone (15) in its external surface at its inner end: - an output shaft (29) having a helical threaded zone (18) in its external surface at its inner end; - a plurality of first helical roller gears (21,21',21") configured to engage with the rotatory input shaft (13) in its helical threaded zone (15) so that they rotate with respect to their axis (22,22',22") when the input shaft (13) rotates; - a plurality of second helical roller gears (23,23',23") configured to engage with the first helical roller gears (21,21',21") and with the output shaft (29) in its helical threaded zone (18) so that the rotation of the first helical roller gears (21,21',21") is firstly transmitted to the second helical roller gears (23,23',23"), which rotate with respect to their axis (24,24',24"), and secondly converted in a linear movement of the output shaft (29).

The invention aims to provide an external pilot balance type kingston valve. The external pilot balance type kingston valve comprises a two-position and three-way reversing valve, wherein the two-position and three-way reversing valve comprises a reversing valve body and a reversing valve element; the reversing valve body is fixed to a valve cover; a spring sleeve is fixed to the lower end of the reversing valve body and is internally provided with a spring; the reversing valve element is arranged inside the reversing valve body and located on the spring; a valve element thrust wheel is installed at the top end of the reversing valve element; a pressure lever support is fixed to the top end of the reversing valve body and is provided with a pressure lever; a revolute pair is formed by the pressure lever and the pressure lever support; the first end portion of the pressure lever abuts against the valve element thrust wheel; the pressure lever is matched with the spring to control the reversing valve element to move vertically; the second end portion of the pressure lever is provided with a pressure lever rotary wheel. By the adoption of the balance pressure principle, a pilot tube guides high pressure water of a water inlet of the valve into a balance pressure cavity, backward backpressure on a valve head is formed, pressure on the valve head by the high pressure water of the water inlet of the valve is completely counteracted when the valve is switched on, and thus the valve is switched on easily.

The invention discloses a rapid cycle type mechanical graphene stripping device which comprises supporting legs, wherein supporting rods are fixedly connected to the middles of the supporting legs; afirst motor is fixedly connected to the middle of the supporting rods; the output shaft of the first motor is fixedly connected with a first rotating shaft through a coupling; the top of the supporting legs is fixedly connected with a stripping box. The rapid cycle type mechanical graphene stripping device achieves an effect of performing primary rotary stripping on graphite. The graphite can be subjected to primary stripping by a first stator and a first rotor by adopting granite, so that the stripping cost is reduced, and an effect of performing secondary mechanical rotary stripping on the graphite is achieved; the graphite subjected to primary stripping can be continuously subjected to higher-level stripping by a second stator and a second rotor by adopting diamond, so that the graphitestripping effect can be effectively enhanced. Therefore, the problems that chemical pollution is easily produced by a chemical production method, high-pressure vacuum equipment is high in construction cost, and mechanical stripping equipment is large in occupied area are effectively solved.

The invention provides a sponge city water storage pipeline anti-blocking structure, and belongs to the technical field of pipeline drainage. The sponge city water storage pipeline anti-blocking structure comprises a water conveying pipe, a dredging pipeline is fixedly connected to the lower surface of the water conveying pipe, a distributary pipe is nested in the top of the dredging pipeline, aninner sliding sleeve is slidably connected into the dredging pipeline, and a middle shaft rod is rotatably connected into the dredging pipeline. According to the sponge city water storage pipeline anti-blocking structure, water wheel blades are arranged, water flow impacts the surfaces of the water wheel blades under the guidance of a guide plate through the gravity effect, the water wheel bladesrotate under the impact of the water flow and drive rotating rods to rotate, and the synchronous rotating rods rotate to drive cleaning rods to swing; and furthermore, bristles continuously brush thelower surface of a filter layer, the upper surface of a grid layer and the bottom end in the inner sliding sleeve, impurities at the three positions are removed, sludge is effectively prevented from being deposited at the filter layer and the bottom end in the inner sliding sleeve, and the clogging possibility of the device is greatly reduced.

The invention discloses a pneumatic typethermal blockage dredging filter screen based on waste gas and dust purification, and belongs to the technical field of waste gas purification. According to thescheme, when a first filter screen is blocked, the air pressure on the left side of the first filter screen can be gradually increased, so that part of waste gas is promoted to fully react with reductive iron powder, and therefore, the temperature of a memory alloy spring increases, metal blockage dredging fiber ropes are pushed to move rightward to break granular materials accumulated on the left side of the first filter screen; when the waste gas enters an air impact balloon, a pneumatic rotating plate can be promoted to rotate, so that a built-in air bag ball is driven to rotate; along with the rotation of the built-in air bag ball, ferric ferrous oxide obtained after reacting reductive iron powder and oxygen is adsorbed, the reaction between oxygen in the waste gas and the reductive iron powder can be promoted by means of swing of thepneumatic rotating plate, so that the heat production efficiency is improved; and after the temperature is reduced, the memory alloy spring is promoted to recover to the low-temperature phase state thereof, so that the metal blockage dredging fiber ropes are dragged to reset.

Method for feeding in waste material from an inlet chute into the container space of a material container, in which inlet chute is arranged at least one input point, in which is an input aperture for feeding in material into the inlet chute and onwards along a channel section of the inlet chute into a material container, which inlet chute includes a mainly vertical channel section and a section deviating from the vertical direction. The conveying of material to be conveyed in the inlet chute is enhanced at least in the section of the inlet chute deviating from the vertical direction by bringing about a transporting air flow in the inlet chute in the input direction of material towards the material container, which transporting air flow is brought about at least partly with a fan, the blowing side of which fan is connected into medium connection with the inlet chute and / or the suction side of the fan is connected into medium connection with the container space of the material container. The invention also relates to an apparatus.

The invention discloses a parameter fitting-based voltage controlling method for active distribution feeders. The method is characterized by including the steps: 1, a master control unit acquires voltage state information of each feeder; 2, if a voltage minimum of each feeder is lower than a lower limit, parameter fitting-based feeder reactive power voltage-regulation or loading shedding operating voltage controlling is performed; 3, a voltage maximum of each feeder is higher than an upper limit, parameter fitting-based feeder reactive power voltage-regulation or parameter fitting-based feeder active power voltage-regulation is performed. The method has the advantages that all calculation tasks are performed in the master control unit, using great storage space is avoided, data communication quantity and communication times are decreased, and communication time and calculation time are shortened.

The invention belongs to the technical field of silicon dioxide aerogel thermal insulation materials, and particularly relates to a preparation method of a silicon dioxide aerogel thermal insulation filler. The preparation method comprises the following steps: dissolving an inorganic foaming agent in water, adding silicon dioxide aerogel, and uniformly stirring and mixing to obtain nonporous silicon dioxide aerogel; melting paraffin at 50-70 DEG C, uniformly grinding the paraffin and calcium chloride, spraying the obtained mixture on the surface of the prepared nonporous silicon dioxide aerogel, adding the sprayed nonporous silicon dioxide aerogel into water, stirring, and adding an inorganic dispersing agent to completely disperse the silicon dioxide aerogel of which the surface is coatedwith the paraffin in the water to obtain a dispersion system; and adding sodium carbonate into the dispersion system, stirring until calcium chloride in the paraffin coated on the surface of the silicon dioxide aerogel and sodium carbonate form a calcium carbonate coating layer, centrifugally filtering, and drying at 60-80 DEG C for 15-24 hours to obtain the silicon dioxide aerogel thermal insulation filler.

The invention provides a nozzle needle tip calibration method and a low-temperature printing platform based on a 3D printer. The nozzle needle tip calibration method includes the following steps thatS01, a quick positioning stage is carried out, specifically, a controller drives a nozzle needle tip to be close to a position sensor at a speed V2, so that the needle tip drives the calibration planeof the position sensor to generate a retraction displacement L2, and the controller calculates the initial calibration height H of the calibration plane between the needle tip and the position sensoraccording to the retraction displacement L2; S02, a stage which returns to secondary calibration height is carried out, specifically, the controller drives the nozzle needle tip to move an L2+L3 distance in the opposite direction at a speed V3, wherein H is more than L3, and L3 is more than 0; and S03, a low-speed calibration stage is carried out, specifically, the controller drives the needle tip to move toward the calibration plane at a speed V4, so that the needle tip drives the calibration plane of the position sensor to generate a retraction displacement L4, and the calibration process is completed. Through the nozzle needle tip calibration method and the low-temperature printing platform based on the 3D printer, more rapid and efficient nozzle needle tip calibration can be achieved.

The invention relates to a riverbed cleaning device, in particular to a sand pumping system for riverbed sand of a reservoir on a hyper-concentration river, and belongs to the field of water conservancy. The number of IPC (international patent classification) of the sand pumping system is E02B 3 / 02 and E02D 17 / 16. A mud suction device comprising a plurality of reamers and a spraying gun is adopted for the sand pumping system to crush and stir deposited matter so that deposited silt can be kept suspended and a high-concentration muddy water field can be formed; and meanwhile, a filtering grid, a protective cover and other auxiliary facilities are arranged to isolate muddy water, so that muddy water suction operation areas large enough in number and relatively stable in concentration are more effectively formed, the reservoir desilting efficiency is greatly improved, and therefore great social benefits and economic benefits are achieved, and the significance is huge.

The invention relates to a forced oil injection lubrication system for an open gear of a walking box of a coal mining machine. The system comprises a cam and a spring-reset single-acting piston cylinder, a spring cavity of the piston cylinder is connected to nozzle devices through an oil drainage pipeline, a spring-free cavity is connected with a lubricating oil source through an oil inlet pipeline, and the two cavities communicates through a bypass pipeline; the cam is coaxially fixed on a driving wheel shaft or a walking wheel shaft of the walking box of the coal mining machine, the piston cylinder is vertically arranged relative to the driving wheel shaft, and the rim of the cam is in contact with an end of a piston rod extending from the spring-free cavity; and the nozzle devices are arranged on a walking box body of the coal mining machine, oil injection ports face the driving wheel and / or the walking wheel, the oil drainage pipeline, and the oil inlet pipeline and the bypass pipeline are respectively provided with an oil drainage one-way valve, an oil inlet one-way valve and a bypass one-way valve. According to the system, the lubrication state of the open gear of the walkingbox can be guaranteed, the noise during running of the walking box is greatly reduced, and the service life of the open gear of the walking box is greatly prolonged.

The invention discloses an opening and closing device of a building coating material stirring box. The opening and closing device comprises a feeding box and a driving box, wherein two sides of the upper half portion of the feeding box are provided with limiting mechanisms, one side of the lower half portion of the feeding box is provided with a material guiding mechanism connected with the inner periphery of the feeding box, the bottom of the feeding box is in the shape of a quadrangular frustum pyramid, the driving box is arranged below the feeding box, a box cover is mounted at the top of the driving box through driving bolts, a conveying opening formed in the center of the box cover is fixedly welded to the periphery of the lower half portion of the feeding box, a supporting block is fixedly welded to the side, close to the box cover, of the driving box, a dust removal mechanism penetrating through the driving box and connected with the bottom of the box cover is arranged in a supporting groove formed in the center of the supporting block, and two groups of symmetrical driving mechanisms are arranged on the inner circumference of the driving box. According to the opening and closing device of the building coating material stirring box, materials can be pretreated while the materials can be stably conveyed, and pollution generated in the conveying process is reduced.

The invention relates to a riverbed cleaning method, in particular to a sand pumping method for riverbed sediment of a heavily silt-carrying river reservoir, and belongs to the field of water conservancy. The IPC number is E02B 3 / 02 and E02D 17 / 16. According to the sand pumping method, a mud sucking device comprising a plurality of reamers and a plurality of spraying guns is adopted for sediment crushing and stirring, so that deposited mud keeps suspended to form a high-concentration muddy water field; meanwhile, auxiliary facilities such as a filtering grid and a protective cover for isolating muddy water are arranged, so that an enough number of muddy water suction operation areas with the relatively stable concentration are formed more effectively, the reservoir desilting efficiency is greatly improved, great social benefits and economic benefits are achieved, and the reservoir sand pumping method is significant.

The invention relates to a scheduling method of an automatic process robot, which is based on a multi-thread concurrent pre-downloading scheduling algorithm of a maximum binary tree priority queue, and fuses the priority queue and multiple threads to ensure that the robot executes tasks accurately, reliably and timely. According to the method, a robot background comprises four threads which run concurrently, namely a to-be-downloaded task query thread, a task downloading thread, a to-be-run query thread and a task running thread; the invention further relates to a scheduling system of the automatic process robot. The scheduling system structurally comprises a console, a query to-be-downloaded module, a downloading task module, a query to-be-operated module, an operation task module, an LEVELDB database, a downloading pool, a maximum binary heap queue and an operation pool. According to the scheduling method and the scheduling system, the priority queue and multiple threads are fused to ensure that the robot accurately, reliably, timely and reasonably executes the task.