32results about How to "Reduce drag force" patented technology

An apparatus for controlling fluid flow into a wellbore tubular includes a flow control member that selectively aligns a port with an opening in communication with a flow bore of the wellbore tubular. The flow control member may have an open position wherein the port is aligned with the opening and a closed position wherein the port is misaligned with the opening. The flow control member moves between the open position and closed position in response to a change in drag force applied by a flowing fluid. A biasing element urges the flow control member to the open or the closed position. The apparatus may include a housing receiving the flow control member. The flow control member and the housing may define a flow space that generates a Couette flow that causes the drag force. In embodiments, the flow space may include a hydrophilic and/or water swellable material.

Methods of forming a golf club head having improved aerodynamic characteristics are disclosed herein. A preferred method is the largest tangent circle method, which utilizes a Cartesian coordinate system. The method results in identification of the highest point of the crown surface located within a crown apex zone, and this location aids in the design of improved aerodynamic properties of the golf club head.

The invention discloses a good-compatibility and absorbable medical suture line which comprises, by weight, 20-40 parts of polyglycollide, 10-20 parts of modified polylactic acid, 50-70 parts of polylactic acid, 10-20 parts of hyaluronic acid, 5-7 parts of methyl methacrylate, 4-6 parts of epoxidized soybean oil, 2-4 parts of tea tree oil, 1-5 parts of polycaprolactone and 0.1-0.3 part of calcium stearate. The invention further discloses a production method of the good-compatibility and absorbable medical suture line. The method includes the steps of S1, producing suture line fibers; S2, preparing coating solution; S3, braiding coating. The medical suture line has the advantages that the suture line is good in compatibility with biological tissues, good in mechanical performance, resistant to degradation and simple to operate, adhesion and reproduction of cells on the suture line are facilitated, and industrial production is facilitated.

The invention discloses a long-acting antibacterial absorbable surgical suture. The long-acting antibacterial absorbable surgical suture comprises, by weight, 80-100 parts of carboxymethyl chitosan, 10-20 parts of polylactic acid, 10-20 parts of polyglycollide, 8-12 parts of hyaluronic acid, 10-15 parts of eel skin collagen, 10-15 parts of trout collagen, 8-10 parts of silk fibroin, 2-4 parts of sorbitol, 2-3 parts of saccharose, 3-5 parts of tea tree oil, 1-2 parts of aldelhydic starch, 3-5 parts of dicyclohexylcarbodiimide, 0.5-0.7 part of glutaraldehyde and 2-6 parts of coating. The long-acting antibacterial absorbable surgical suture has the advantages of good antibacterial and anti-inflammatory properties, no organic solvent, little environmental pollution, good compatibility with biological tissues, easiness for cell adhesion and cell proliferation and good mechanical property.

The invention provides a rehabilitating robot for an ultraviolet curing pipeline. An ultraviolet irradiating lamp comprises lamp plates distributed at the circumference of a frame body and ultraviolet LED lamps evenly distributed on the lamp plates. The frame body is provided with a spring sleeve. A thread is arranged on the outer surface of the spring sleeve, and the spring sleeve can rotate around the frame body in the circumferential direction. A driving arm is formed by connecting two supporting arms in a cross mode, one end of the first supporting arm is fixed on the frame body, and one end of the second supporting arm is connected with a driving arm nut. The driving arm nut is connected with the spring sleeve in a sleeving mode and matched with the thread on the outer surface of the spring sleeve. A tail section frame body is further internally provided with a network transmission module and a first power line carrier module. The first power line carrier module is connected with a second aviation plug. Cables are power cables. According to the rehabilitating robot for the ultraviolet curing pipeline, by adopting the evenly-distributed ultraviolet LED lamps, radiation is more even, and the curing effect is improved; and through combining of the spring sleeve and the driving arm, the robot is adapted to requirements of different pipe diameters, and the material cost and time cost are more saved.

The invention discloses an anti-inflammatory, anti-bacterial and absorbable medical suture comprising raw materials in parts by weight as follows: 80-100 parts of carboxymethyl chitosan, 10-20 parts of polyactic acid, 10-15 parts of grass carp bone collagen, 8-12 parts of pig skin collagen, 4-6 parts of aldehyde starch, 2-4 parts of maltose and 1-5 parts of a coating. The invention further discloses a preparation method of the anti-inflammatory, antibacterial and absorbable medical suture. The method comprises steps as follows: S1, preparing suture fibers; S2, preparing a coating solution; S3, performing coating treatment and knitting. The suture is good in anti-inflammatory and antibacterial performance, well compatible with biological tissue, good in mechanical performance and simple to operate, cells can adhere and reproduce on the suture easily, and industrial production is facilitated.

The invention relates to a floating plate device for deposition promotion and strengthening of a sunken fascine mattress. The floating plate device comprises an inflation floating plate, anchor piles and hanging ropes. The inflation floating plate is made of waterproof and weatherproof flexible materials. The inflation floating plate is in a plate shape after being inflated with air. The thickness of the inflated floating plate is controlled through plate inner reinforced belts, and the strength of the floating plate is improved by adding reinforcement strips outside longitudinal plates and transverse plates which are arranged on the double faces. The height of holes in the lower edge of the floating plate is controlled with the length of the hanging ropes for bottom high-sand-content water to pass. The anchor piles are anchored in silt of a bottom bed and connected with the inflation floating plate through the hanging ropes, anchoring force is provided for the inflation floating plate, the modular design is adopted in the floating plate device, the floating plate device can be installed on a large area of an area easy to scour, and scouring protection and silt deposition promotion are carried out. When the installed floating plate reaches the sand deposition promoting limit, the upper edge of the floating plate can be connected and provided with a next-period floating plate device, and the function of deposition promoting continues to be performed. Compared with the prior art, the floating plate device has the beneficial effects that cost is low, installing is convenient, modular design and self protection are achieved, and the underwater ecological environment can be improved.

The invention discloses an antibacterial absorbable surgical suture and a method for preparing the same. The antibacterial absorbable surgical suture comprises, by weight, 90-110 parts of cereal alcohol-soluble proteins, 415-440 parts of ethanol aqueous solution, 10-100 parts of chitosan, 54-71 parts of oleic acid and 5-10 parts of glycerin. The method includes adding the cereal alcohol-soluble proteins into the ethanol aqueous solution and stirring and dissolving the cereal alcohol-soluble proteins in the ethanol aqueous solution to obtain mixed liquid; adding the oleic acid into the mixed liquid and stirring the oleic acid and the mixed liquid until uniform and transparent solution is obtained; adding the chitosan into the uniformly mixed solution, stirring the chitosan and the solution under heat-insulation conditions at the temperature of 60-70 DEG C for 40-90 min to obtain other solution and then cooling the other solution at the normal temperature under the normal pressure until the temperature of the other solution reaches the room temperature so as to obtain suture forming stock solution; filling suture forming devices with the suture forming stock solution, squeezing the suture forming stock solution into coagulating bath and coagulating and simultaneously stretching the suture forming stock solution to obtain sutures; coating the glycerin on the surfaces of the sutures, drying the sutures at the room temperature and sterilizing the sutures to obtain the antibacterial absorbable surgical suture. The antibacterial absorbable surgical suture and the method have the advantages that the antibacterial absorbable surgical suture is good in biocompatibility and degradability and free of toxic and side effects and is antibacterial, and inflammation and wound infection can be prevented.

The invention relates to the technical field of control control, in particular to a paving device and a paving system for flexible liquid supply pipes. The paving device comprises a moving part and a guide part mounted as a whole; the guide part includes an arc through groove embedded in the flexible liquid supply pipes; the moving part is butted against a bearing basal body for bearing the paving device, and can move corresponding to the bearing basal body; the flexible liquid supply pipes include extension sections for penetrating through the arc through groove, and followup sections not penetrating through the arc through groove; the extension sections and the followup sections are respectively positioned on two sides of the arc through groove; the paving device can flatly move; and the flat moving direction is corresponding to the moving direction of the extension sections. The structure is set by the structure principle of a movable pulley, so that the dragging convenience for the flexible liquid supply pipes is prominently improved, and the dragging energy consumption is reduced. The invention further provides a paving system; the paving system comprises two paving devices oppositely arranged for realizing setting and dragging of the flexible liquid supply pipes in the same one direction; and meanwhile, the paving system improves the dragging convenience, and reduces the energy consumption.

The invention provides a cable and a cable component. The cable comprises a cable reinforcing core, conductors, a wrapping layer for wrapping the cable reinforcing core and the conductor, a tensile and compressive mechanism for protecting the cable, and an adaptive protection mechanism for assisting the cable to adapt to an underwater environment. The surface of the cable reinforcing core is sleeved with an inner wrapping layer, the plurality of conductors are arranged around the cable reinforcing core, and the surface of each conductor is sleeved with an insulating layer. The invention relates to the field of cables. According to the cable and the cable component, two mutually associated special structures are arranged, for the problems of cables under trees, the large pressure borne by the cable is relieved, and the underwater adaptability of the cable is enhanced, thereby effectively solving the problems that when a common cable is used underwater, the pulling time and strength of the cable are large, the cable is liable to be rolled, the internal structure of the cable is liable to be delaminated and damaged, the maintenance work difficulty of the damaged cable is large, and the cost is high.

The invention discloses a fire-fighting water cannon capable of storing a water hose. The fire-fighting water cannon comprises a chassis, wherein the upper end surface of the chassis is rotatably provided with a central column, the central column is internally provided with a water passing cavity with an upward opening, the outer circular surface of the central column is wound with a water hose, one end, which is wound inside, of the water hose is fixedly connected to the left end of the outer circular surface of the central column, the left wall of the water passing cavity communicates with awater inlet communicating with the water hose, and a joint which can be installed with a fire hydrant is fixedly arranged at one end, which is wound at the outermost side, of the water hose. According to the water cannon, through movement of rollers, the water cannon can be rapidly moved to an injection point, meanwhile, the water cannon itself is fixedly connected with the water hose, the splicing work of the water hose is reduced, the water supply efficiency is improved, meanwhile, when the water hose is stored, the fire-fighting water cannon can be pushed to move along the laying path of the water hose, the water hose is wound through rolling of the rollers, dragging force on the water hose can be reduced, the abrasion of the water hose can be reduced, and the working intensity of thewater hose storage is reduced.

A portable fairing for a mobile radar array system includes at least partially open housing surrounding the mobile radar array and a curved covering mounted on the housing. The curved covering is adapted to cover the radar array in a closed position. The sides of the housing are curved such that when the curved covering is closed, the housing and the curved covering form a generally curved structure.

In one aspect, the present disclosure provides a method for self-assembly of magnetic building blocks, including distributing a plurality of building blocks in a liquid medium, each of the plurality of building blocks having a plurality of stable radicals, establishing a magnetic field interacting with at least a portion of the plurality of building blocks, guiding with the magnetic field the portion of the plurality of building blocks from a first location in the liquid medium to a second location in the liquid medium, assembling into a first construct the portion of the plurality of building blocks proximate the second location, and treating the first construct with at least one antioxidant to neutralize at least in part the plurality of stable radicals.

The invention provides a water surface flapping wing flying robot. The water surface flapping wing flying robot comprises a main body supporting frame, flapping wings, a driving system and a water surface supporting system, the main body supporting frame is located on the upper portion of the robot, the driving system comprises a motor, a gear speed reduction set, a crank sliding block mechanism and two four-bar mechanisms, the motor is installed on the lower side of the main body supporting frame, and the gear speed reduction set is installed in the main body supporting frame; the crank sliding block mechanism and the four-connecting-rod mechanisms are installed above the main body supporting frame, the two four-connecting-rod mechanisms are symmetrically arranged on the two sides of the crank sliding block mechanism, and the two four-connecting-rod mechanisms are both connected with the output end of the crank sliding block mechanism; two flapping wings are arranged and are symmetrically arranged on the left side and the right side of the main body supporting frame and connected to the output ends of the four-connecting-rod mechanisms on the corresponding sides, and the water surface supporting systems are installed under motors of the driving systems. Water surface floating and flapping wing flying are combined, the near-water space movement range of the robot is expanded, and maneuverability and flexibility are enhanced.

The invention provides a robot capable of jumping and sliding on water surface. The robot comprises a water surface supporting system, a main body supporting frame, a driving system, a pitch angle adjusting mechanism, an energy storage spring, two driving legs and two space elliptical track mechanisms; the main body supporting frame is located above the water surface supporting system, the main body supporting frame and the water surface supporting system are connected through a pair of hinge bases, the two space elliptical track mechanisms are symmetrically installed on the left side and the right side of the rear portion of the main body supporting frame, each space elliptical track mechanism is matched with one driving leg, the pitch angle adjusting mechanism is arranged on the left front portion of the main body supporting frame, the pitch angle adjusting mechanism is connected with the main body supporting frame and the water surface supporting system, the driving system is fixed in the main body supporting frame, and the two ends of the energy storage spring are connected to the driving system and the water surface supporting system respectively. The robot is manufactured by adopting a 3D printing technology, a tension spring is used as an energy storage element, and a foam hemisphere and a foam plate are used as supporting bodies, so that the robot has the characteristics of light weight and diversified movement modes.

The invention discloses an auxiliary spraying nozzle with a triangular section, which is applied in a jet weaving machine. An inner cavity of the auxiliary spraying nozzle comprises a triangular part and a semicircular part; and the width of the tip end part of the triangular part is 0.45-0.75mm, and the length of the tip end part of the triangular part is 3.0-4.2mm. By use of the auxiliary spraying nozzle with the triangular section, parallel warps are divided, the blocking force to the warps can be reduced, so that the auxiliary spraying nozzle leads the warps to tend to be stable and is beneficial to weaving ultrafine warps.

The invention discloses a cable-sealed traversing well washing tool. The cable-sealed traversing well washing tool comprises an outer tool barrel, a radial squeezing sealing device and an axial movingdriving device, wherein the axial moving driving device and the radial squeezing sealing device are assembled inside the outer tool barrel; the axial moving driving device is assembled at the lower end of the radial squeezing sealing device; a conical surface inner bulge for forcing the radial squeezing sealing device to shrink radially is arranged on the inner wall of the outer tool barrel; a circulating hole is formed in the outer tool barrel; the circulating hole is formed above the conical surface inner bulge. A test cable can run through the well washing tool axially, and a well washingfluid cannot run through the well washing tool axially, but can only circulate in a well washing channel sideways, so that contact between a circuit joint of a test instrument and the well washing fluid is avoided while the connection between the cable and the test instrument is guaranteed; the cable-sealed traversing well washing tool has the characteristics of being simple in structure, convenient in operation and connection and reliable in sealing.

The invention provides a photovoltaic tile with a heat dissipation function. The photovoltaic tile comprises a tile body, a crystalline silicon solar module and a radiator; the crystalline silicon solar module is arranged on the upper surface of the tile body; the radiator comprises a substrate and a cooling fin extending downwards from the lower surface of the substrate; the substrate of the radiator is installed on the lower surface of the tile body; and heat conducting silicone grease is coated between the substrate and the tile body. Compared with the prior art, the photovoltaic tile provided by the invention adopts the radiator for cooling, so that the crystalline silicon solar module is prevented from being overheated, the generating capacity of the module is stabilized, the potential safety hazard of the outdoor long-term operation is reduced, and the service life is improved; the heat conducting silicone grease has heat conducting, temperature-resisting and insulating performance; the sufficient degree of contact between the radiator and the tile body is improved, and the heat conducting efficiency is improved; the radiator is modularized, so as to be conveniently combinedand installed with the photovoltaic tile.

A runner of the Francis type including a crown, a plurality of blades, each blade being defined by a pressure surface, a suction surface, an edge adjoining the high pressure side and a spaced apart edge adjoining the low pressure side. The crown includes a seal to seal the space above the crown against water from the high pressure side. The further runner includes at least one passage being capable to drain high pressure leakage water to the low pressure side. The passage includes an inlet aperture located in a portion of the crown which is exposed to high pressure leakage water. The passage is located within a blade and leads from the inlet aperture to the edge of the same blade adjoining to the low pressure side. The passage is shaped to form a continuous opening in the same edge adjoining to the low pressure side.

The invention discloses an ecological energy-saving environment-friendly river purification device which comprises a flow guide plate with a head end arranged on a riverbed, the tail end of the flow guide plate is in shaft connection with an advection plate floating on the water surface, and the advection plate is provided with a filtering mechanism used for rotating along with water flow to filter impurities in the water flow. The tail end of the advection plate is provided with a recycling mechanism used for recycling filtered sundries along with rotation of the filtering mechanism, and the bottom of the advection plate is further provided with an auxiliary mechanism used for increasing the floating acting force of the advection plate when the sundries are increased due to quickening of the water flow speed. According to the ecological energy-saving and environment-friendly river purification device, garbage is intensively collected when a filtering conveying plate and a filtering conveying belt are driven to rotate through the acting force of water flow, then the garbage is conveyed into a garbage can through a recycling conveying belt and a recycling conveying plate, energy consumption can be effectively reduced, the frequency of manual cleaning is reduced, and when the water flow is too large, a floating column moves to the bottom of the advection plate through an auxiliary mechanism so that the advection plate can stably float on the water surface.