38results about How to "Improve flow resistance" patented technology

A bidirectional downhole fluid flow control system is operable to control the inflow of formation fluids and the outflow of injection fluids. The system includes at least one injection flow control component and at least one production flow control component in parallel with the at least one injection flow control component. The at least one injection flow control component and the at least one production flow control component each have direction dependent flow resistance, such that injection fluid flow experiences a greater flow resistance through the at least one production flow control component than through the at least one injection flow control component and such that production fluid flow experiences a greater flow resistance through the at least one injection flow control component than through the at least one production flow control component.

The present invention provides a porous cellulose gel having a high mechanical strength capable of being operated at a higher flow rate, and a method for producing the same. To a suspension liquid of cellulose particles, a crosslinking agent in an amount of from 4 to 12 times the amount of the cellulose monomer in terms of moles and an alkali in an amount of from 0.1 to 1.5 times the amount of the crosslinking agent in terms of moles are added continuously dropwise or added dividedly over a prescribed period of time, whereby flow rate characteristics of a resulting porous cellulose gel can be enhanced. According to the invention, the production efficiency of a polymer substance, such as a nucleic acid and a protein can be enhanced.

Method and apparatus for beverage extraction needle side holes or apertures. The leading and trailing edges of the apertures may be shaped or otherwise configured to help reduce the possibility of coring or shearing of material as the needle is inserted into and/or withdrawn from material, such as a cork. Convex leading and/or trailing edges may help deflect material away from the aperture, reducing shearing. Concave leading and/or trailing edges may help prevent entry of material into the aperture, again reducing shearing.

The invention relates to a cold-resistant and high temperature-resistant composite material and a preparation method thereof. The composite material is prepared from the following raw materials in part by weight: 20 to 30 parts of polyethylene, 5 to 10 parts of polyvinyl butyral, 10 to 15 parts of SBS, 10 to 20 parts of diatomite, 5 to 10 parts of vinlacetate copolymer (EVA), 10 to 15 parts of acrylonitrile (ABS), 20 to 25 parts of SMN resin, 5 to 10 parts of JC-G530C reinforcing agent, 0.3 to 0.5 part of lignocellulose and the balance of nano calcium carbonate, wherein the nano calcium carbonate accounts for 15 to 25 percent of the total weight of the materials. The composite material overcomes the defects of poor low-temperature stability of bituminous pavements in monsoon climate regions of medium latitudes in China and poor high-temperature rutting resistance of the bituminous pavements at the same time. In addition, most of the raw materials of the composite material are recyclable and renewable materials, so that the composite material is energy-saving and environmentally-friendly. The composite material is very flexible and convenient in use and has very high economic and social benefits.

The invention discloses a preparation method of modified asphalt. The modified asphalt is produced by asphalt and an undersaturation double bond compound which are reacted under the action of an evocating agent; the method comprises the following steps: firstly, the asphalt is put into a reaction kettle; the evocating agent is added into the reaction kettle; the weight of the evocating agent is 0.05-1 percent of the weight of the asphalt; the undersaturation double bond compound with the weight of 1-10 percent of that of the asphalt and 0.1-1 percent of N-phenyl maleimide are added into the reaction kettle at the temperature of 80-160 DEG C; and the pressure remains 0.1-0.4 MPa. The reaction is carried out for 3-6 hours; the reaction product is deaerated and filtered, and then the modified asphalt is obtained. The chemically modified asphalt provided by the method has good performance, which greatly improves the shortcomings that the common asphalt has strong temperature sensibility, low viscosity, poor flexility and the like. The modified asphalt can meet the use performance of roads and prolong the service life of roads; when the modified asphalt is used in road maintaining, maintenance, the time of traffic closing is shortened, the construction condition is improved and the construction efficiency is increased.

Thermally curable adhesive compositions and method for failure analysis in micro-fluid ejections heads. The adhesive composition may be provided by a composition including from about 50.0 to about 95.0 percent by weight of at least one cross-linkable resin, from about 0.1 to about 30.0 percent by weight of at least one thermal curative agent, and from about 0.0 to about 5.0 percent by weight filler, from about 0.1 to about 10.0 percent by weight fluorescent pigment. Upon curing, the adhesive composition exhibits a relatively low shear modulus.

The invention provides an aging-resistant caulking filling material and a preparation method thereof. The caulking filling material comprises the following components: 100 parts of petroleum asphalt, 5-20 parts of aromatic-hydrocarbon-enriched extract oil, 3-20 parts of styrene-butadiene-styrene block polymer (SBS), 1-8 parts of ethylene bis stearamide (EBS), 0.3-1.5 parts of antioxidant 168, 1-5 parts of light screening agent and 0.1-0.3 part of crosslinking agent. The preparation method comprises the following steps: heating to melt the asphalt, adding the extract oil, SBS, EBS and antioxidant, shearing, uniformly mixing, and then adding the crosslinking agent and light screening agent. The caulking filling material provided by the invention has better high/low temperature property and low crack pouring construction temperature; and above all, the antioxidant and light screening agent are introduced, so that the aging speed of the caulking asphalt material is reduced, the aging resistance of the bridge floor caulking material is obviously improved, and the service life of the bridge floor is prolonged. Thus, the invention can be used for the paving and repairing of expansion joints and cracks on the bridge floor.

The invention discloses a flowing and wave resisting cultivating raft, comprising a cultivation rope raft; wherein any end of the cultivation rope raft is connected with two lacing lines, and the free end of the lacing line is connected with an assisting self-drowning pile body; a fixed pulley is arranged at the middle part of the lacing line and is connected with a main self-drowning pile body; an inflatable floating body device is connected at the part of the lacing line, between the fixed pulley and the assisting self-drowning pile body, and the inflatable floating body device in water has different angles according to the air-filling proportion of the inflatable floating body device, so as to further improve the anti-flowing performance; in addition, under the wave action, the inflatable floating body device is combined with the fixation of the main self-drowning pile body and the assisting self-drowning pile body, so as to lead the lacing line to slide on the fixed pulley and buffer part of wavy force; therefore, the flowing and wave resisting effect of the invention is improved greatly compared with the prior art; in addition, the operation is convenient, the raft is suitable for the usage in the production, and the safety is high.

The invention provides a caulking filling material easy for construction and a preparation method thereof. The caulking filling material is composed of 100 parts of petroleum asphalt, 5-20 parts of extract oil containing rich aromatic hydrocarbon, 3-20 parts of styrene-butadiene-styrene block polymer (SBS), 1-8 parts of ethylene bis stearamide (EBS) and 0.1-0.3 part of crosslinking agent. The preparation method comprises the following steps: heating to melt asphalt, adding the extract oil, SBS and EBS, carrying out shear mixing, adding the crosslinking agent, and evenly mixing to obtain the caulking filling material easy for construction. The caulking filling material provided by the invention has favorable high and low temperature properties; by adding the EBS, the caulking filling material has favorable flow resistance at service temperature, and the crack pouring construction temperature of the caulking filling material is obviously lowered; and the caulking filling material is easy for construction, lowers the energy consumption, decreases the emissions of smoke and other harmful gases, reduces the environmental pollution, and can be used for pavement and repair of expansion joints and cracks in bridge roads.

The invention discloses a multi-channel ball valve structure and an electric ball valve, and relates to the technical field of valves. The ball valve structure comprises a valve body, a valve ball anda valve cover, wherein a valve rod is connected with the valve ball, the valve body is provided with an inlet, an inlet II, an outlet I and an outlet II which are connected with a pipeline, the valveball is provided with a first channel, a second channel, a third channel, a fourth channel and a fifth channel, the inlet communicates with the first channel, the second channel and the third channelare 45 degrees, and the third channel and the fourth channel are 45 degrees, and the electric ball valve comprises the ball valve structure and an electric actuator. The invention further discloses an application of the electric ball valve. The multi-channel ball valve structure, the electric ball valve and the application of the electric ball valve have the beneficial effects that the size is small, the weight is light, the installation and maintenance are convenient, and four stop valves in the prior art are replaced; and at the same time, at least a double sealing structure is adopted, thesealing form is reliable, and the sealing effect of the ball valve is improved.

The invention relates to a processing method and equipment of waste high polymer. Asphalt and waste polymer are mixed and liquefied in a liquefaction reaction kettle under high-temperature inert gases according to the ratio of 3:1 to 4:1, to obtain polymer modified asphalt--plastic asphalt. The reaction kettle adopts the structure that an asphalt inlet is arranged at the top part; an asphalt distributing plate is arranged at the asphalt inlet; a liquefying furnace is arranged at the middle part of the kettle; heating wires are arranged inside the kettle; a plastic asphalt outlet is arranged at the lower part of the kettle; and a plastic asphalt distributing plate and a stirrer are arranged at the upper part of the outlet. The waste high polymer liquefaction reaction kettle and the processing method change the usage of waste plastic, the waste plastic in electronic waste is directly liquefied under high temperature and high pressure without sorting and cleaning, and then is prepared into the plastic asphalt; compared with the plain asphalt, the plastic asphalt has better flow resistance, skid prevention, abrasion resistance, cold cracking reducing and better drainage performance; and the technological processes are reduced, and the regeneration and utilization of the resource are realized.

The invention relates to a flow restrictor in a micro-droplet jetting printing head in order to solve a technical problem that the existing flow restrictor of the micro-droplet jetting printing head is liable to cause pressure loss of a pressure chamber and pressure crosstalk between the pressure chambers. The first flow restrictor provided by the invention comprises a main ink path and multiple branch ink paths arranged at the outlet of the main ink path in parallel, wherein the branch ink paths are zigzag ink paths, and the central axis of each zigzag ink path is a broken line. Meanwhile, the invention further provides a flow restrictor with another structure. The flow restrictor comprises an ink path, wherein the ink path is a zigzag ink path or a section of the ink path is a zigzag inkpath, and the central axis of the zigzag ink path is a broken line. The flow restrictor adopts the zigzag ink path, and the zigzag ink path is conducive to increasing the flow damping at the outlet of the pressure chamber, reducing the backflow of a liquid in the pressure chamber, reducing the pressure loss in the pressure chamber and improving the jetting performance of the printing head and capable of reducing the pressure crosstalk between the pressure chambers at the same time.

The invention discloses a reflection crack resistant, low noise, highly durable asphalt mixture and its thin layer surfacing pavement method. Provided are: an economic and eco-friendly asphalt additive for inhibiting reflection crack and enhancing the durability of a road; an asphalt mixture comprising the same; and a method for paving a thin layer using the same. The inventors invents: a plant-type asphalt additive in which plant oil, naphthene-based oil, a mineral fiber, and an organic vulcanization accelerator are mixed; a low-noise asphalt mixture comprising the additive; and a method for paving a reflection crack-resistant, low-noise, and highly durable thin layer using the asphalt mixture.

The invention discloses a self-powered submersible net cage which comprises a submersible net cage body with a rigid main frame. A floating frame in the shape of a prismatic table is connected at the upper portion of the main frame. A sealed mesh is connected onto the inner side of the submersible net cage body. A traction cable is connected onto the lower side of the rigid frame and a self-submersion base, and the self-submersion base is provided with a winding-unwinding control assembly. The winding-unwinding control assembly can wind and unwind the traction cable as required so as to control the distance between the self-submersion base and the rigid main frame. The submersible net cage body is connected with a transducer which can convert wave energy to electricity, supply electricity to the winding-unwinding control assembly and store electricity. The winding-unwinding control assembly controls the distance between the self-submersion base and the rigid main frame by winding and unwinding the traction rope, and therefore harvesting and stocking of marketable fishes according to demands are achieved. The transducer generates electricity and store the electricity in the winding-unwinding control assembly. Therefore, the self-powered submersible net cage has the advantages of needing no counterweight system, being convenient to manage, small in energy consumption, good in storm resistance, constant in aquatic water capacity and applicable to middle and lower layer fish breeding.

The invention discloses a down-flow type anti-flow net cage, including a rectangular floating pipe positioned at the top of the net cage, wherein a cylindrical net cage with a horizontal axis is connected to the lower end of the floating pipe; an annular strengthening truss is arranged at one end of the cylindrical net cage, while a flow divider with a conical steel pipe truss structure is connected to the other end of the strengthening truss; a HDPE immersed pipe is arranged at the bottom of the cylindrical net cage along the direction parallel to the axis; the HDPE immersed pipe is filled with iron sand. Compared with the prior art, better stability is provided for water fluctuation due to the application of the conical flow divider, so that the instant pulling force extreme value of an anchor line system can become effective, the risk of dragging can be effectively reduced, and thereby the construction requirement of an anchoring device can be reduced. Compared with the prior art, the HDPE immersed pipe filled with the iron sand has the advantages of balanced traction force and good stability. And therefore, the down-flow type anti-flow net cage has the advantages of stable structure, outstanding anti-flow performance, good stability, low cost and low construction technical requirements.

The invention discloses a submergence lifting net cage comprising a submergence net cage body provided with a rigid main frame, wherein a prismatic floating frame is connected to the upper part of the main frame; a closed mesh is connected to the inner side of the submergence net cage body; a traction cable is connected to the lower side of the rigid main frame; the traction cable is further connected with a self-submergence base provided with a coiling and uncoiling control component; the coiling and uncoiling control component can be used for controlling the distance between the self-submergence base and the rigid main frame by coiling and uncoiling the traction cable according to needs. The coiling and uncoiling control component is used for coiling and uncoiling the traction cable to control the distance between the self-submergence base and the rigid main frame in order to harvest and breed commercial fish according to demand. The outer side of the rigid main frame is connected with an anchor rope through the traction cable to form an array system for facilitating management. The invention has the advantages of needing no counterweight system, and being convenient to manage, good in wave and current resistance, constant in aquatic water volume and suitable for breeding middle and lower fishes.