146results about How to "Improve axial strength" patented technology

The invention discloses a method for preparing a high-performance polymer pipe. The method adopts the steps that during the extrusion molding process of the pipe, the crystallization, the orientation or the dispersed phase morphological structure of the polymer pipe can be adjusted, controlled and fixed through the shearing action generated by the rotation of a core rod in a machine head relative to an orifice die, or the rotation of the orifice die in the machine head relative to the core rod, or the rotation of the core rod and the orifice die in the identical or opposite direction simultaneously, and by cooling and shaping the inner wall and the outer wall of the extruded pipe simultaneously, and adjusting and controlling the temperature field, the cooling rate and the temperature gradient during the extrusion molding process of the pipe. The invention further discloses a device designed according to the method. The method has the advantages that the macromolecular orientation, the crystallization or the dispersed phase morphological structure which are generated through induction can be retained in the plastic pipe, so that deorientation can be avoided, the internal stress of the pipe can be reduced, and the performance of the pipe is improved.

The invention discloses a reinforced compound sheathing canal, a preparation method and application thereof. The reinforced compound sheathing canal sequentially comprises an inner layer, a reinforced layer and an outer layer from interior to exterior, wherein the reinforced layer comprises axial reinforcing elements and a spiral reinforcing element, the spiral reinforcing element is a single spiral element or is formed by combining two or more spiral elements, the axial reinforcing elements are disposed on the inner side or outer side of the spiral element, or are inserted between the spiral elements, and various axial reinforcing elements are uniformly arranged in the circumference direction of the sheathing canal. The reinforced compound sheathing canal provided by the invention has the advantages of thin wall, high axial strength, high radial strength, high torque transitivity and the like, can be applied to a transport system for transporting medical device implants needed in a minimally invasive treatment and can reduce the outer diameter of the transport system, so that the medical device implants are easy to arrive at lesion positions, damage to the blood vessel of a patient is reduced, and sufficient technical support is provided for reliable, successful and safe transport and implantation of the medical device implants by the transport system.

The invention discloses a mortar-filled glass fiber reinforced plastic pipe, which comprises a lining layer, an inner reinforcing layer, a mortar filler layer and an outer reinforcing layer, wherein the inner reinforcing layer is between the lining layer and the mortar filler layer, and the mortar filler layer comprises quartz sand impregnated with unsaturated polyester resin and ground calcium carbonate. The mortar-filled glass fiber reinforced plastic pipe is characterized in that: in the quartz sand impregnated with unsaturated polyester resin and ground calcium carbonate, the percentage mixing ratio of the unsaturated polyester resin to the quartz sand to the ground calcium carbonate is (9-15):(74-90):(8-14). Compared with the prior art, the mortar-filled glass fiber reinforced plastic pipe has the advantages that: the unsaturated polyester resin content in the mortar filler layer is as low as 9 to 15 percent; the quality of the product is stable and the product is in strict accordance with the requirements of the national GB/T21238-2007standards of glass fiber reinforced plastic mortar-filled pipes on mechanical properties including pipe axial tension, circumferential tension, bending strength, ring stiffness, deflection A and deflection B; and the manufacturing cost of the pipe is reduced by 5 to 30 percent.

The invention belongs to the technical field of aquaculture net cages, in particular to a lift-type aquaculture net cage. The lift-type aquaculture net cage comprises two floating pipes (1) and a floating pipe support (2); the floating pipes (1) are connected together through the floating pipe support (2). The lift-type aquaculture net cage is characterized by also comprising a plurality of vertical rigid hanging beams (3), a plurality of horizontal rigid hanging beams (4) and a gravity regulating device (5); the top ends of the vertical rigid hanging beams (3) are connected onto the floating pipe support (2), and the bottom ends of the adjacent vertical rigid hanging beams (3) are respectively connected with two ends of the corresponding horizontal rigid hanging beam (4); the gravity regulating device (5) is connected with the bottom ends of the vertical rigid hanging beams (3) through underframe nylon mooring ropes (6). The lift-type aquaculture net cage provided by the invention has the advantages that the structure is simpler, the operation control system is simpler and more reliable, netting is low in deformation; lift is safe and reliable by anti-swing cloth, and the function of the net cage is more complete and humanized.

A condenser includes a pair of tanks, at least one of the tanks having a communicating hole, a condenser core arranged between the tanks and having fins and tubes fluidically connected with the tanks, and a connector having a connecting hole. A peripheral portion of the communicating hole is pressed into the connecting hole to form a burring portion which is caulked on an inner face forming the connecting hole so that the connector and the tank are temporarily fixed with each other, and facing portions of the tank and the connector are integrally fixed with each other by blazing. The inner surface of the connecting hole is provided with a holding groove to receive an inserted projecting portion formed on a part of an outer surface of the burring portion for holding the connector to the tank.

The invention provides a moistureproof underground cable protection device, and belongs to the technical field of a cable. The device comprises a moistureproof underground cable and a protection sleeve. The moistureproof underground cable comprises a cable body. The cable body comprises conduction cores, an insulation layer I, a lining layer, a first waterproof layer, a metal sheath, a second waterproof layer and a jacket layer, from the inside to the outside. There are multiple conduction cores. An insulation layer II is wrapped out of the conduction cores. Cross-linking polyolefin is filled among the conduction cores. Carbon fibers are doped in the cross-linking polyolefin. The protection sleeve is sleeved out of the moistureproof underground cable. The protection sleeve comprises a protection sleeve body. The shape of the protection sleeve body matches the shape of the moistureproof underground cable. The inner surface of the protection sleeve body is a structure that concave surfaces and convex surfaces are alternated. An anticorrosive material is coated on the inner surface. According to the device, the structure of an existing underground cable protection device is improved and optimized; the comprehensive performance of the cable is improved; in particular, the corrosion resistance is remarkably improved; and the waterproof performance is excellent; and the stability is high.

The invention discloses a fiber-reinforced thermal insulation board and a preparation method thereof, and relates to the technical field of thermal insulation boards.The fiber-reinforced thermal insulation board is prepared from the following raw materials in parts by weight: 65 to 75 parts of modified magnesium oxysulfate cement slurry, 35 to 45 parts of desulfuration gypsum, 30 to 31 parts of modified expanded perlite, 29 to 30 parts of modified diatomite, 24 to 26 parts of fly ash, 24 to 26 parts of waste glass powder, 15 to 16 parts of auxiliary agents and 75 to 85 parts of water. The fiber-reinforced thermal insulation board has a better compressive property and is not easy to crack, the preparation method is simple and the cost is relatively low.

The invention provides a method for preparing steel lining washing rollers, which includes the following steps: firstly preparing a steel lining roller; then winding the steel lining roller with a carbon fiber layer, wherein during the winding process, frictioning is performed manually while winding to increase the content of carbon fiber; placing the steel lining roller wound with the carbon fiber layer in a curing box for heating and curing; performing the skim coating on the roller surface subjected to curing; finally preparing the finished steel lining composite carbon fiber washing roller. The finished steel lining composite carbon fiber washing roller prepared through adopting the method provided by the invention has the advantages of light weight, antifatigue, excellent rigidity, corrosion resistance and long service life.

An aerodynamically optimized drag-reduction means and method for optimal minimization of the drag-induced resistive forces upon a terrestrial vehicle wheel, where the drag-induced resistive moments on wheel surfaces pivoting about the point of ground contact are reduced, and the vehicle propulsive forces needed to countervail the resistive forces on the wheel are reduced. The drag reduction means includes: a streamlined wheel cover positioned on a vehicle to shield the faster moving upper wheel surfaces from headwinds; a streamlined wind-deflecting fairing positioned on a vehicle to shield the faster moving upper wheel surfaces from headwinds; an engine exhaust pipe diposed on a vehicle whereby exhaust gases deflect headwinds to shield the faster moving upper wheel surfaces of an automotive wheel; an automotive spoked wheel having streamlined oval-shaped wheel spokes arranged in one or more rows for greater axial strength; a streamlined tailfin rotatably attached to a wheel spoke, which thereby may pivot about the spoke in response to varying crosswinds; and a tire having streamlined tread blocks arranged in an aerodynamic pattern.

The invention relates to the field of thermoplastic electric melting pipes, and aims to provide a short fiber reinforced plastic electric melting pipe with an optimized injection position and an injection mold thereof. The pipe comprises an electric melting pipe body embedded with a resistance wire, wherein two binding posts which are respectively connected to the two ends of the resistance wire are arranged on the electric melting pipe body; the electric melting pipe body is made of thermoplastic plastic filled with short fibers; and the injection position is arranged on any end face of the electric melting pipe, so that the injection molding direction is parallel to the axial direction of the pipe. According to the short fiber reinforced plastic electric melting pipe, the axial orientation degree of the fibers in the electric melting pipe is improved, the problem that the fiber orientation is not ideal in the short fiber reinforced thermoplastic plastic electric melting pipe which isinjected by the electric melting pipe injection mold is solved, and the axial strength of the short fiber reinforced plastic electric melting pipe is improved. The pipe is formed in one step by an injection molding method, and an additional steel plate or a fiber reinforced layer is not needed, so that the manufacturing process is simple, the stability is good, the process cost is reduced, and the defects of bonding in the prior art, ring-only enhancement and the like are overcome.

The invention discloses a preparation method of a woven gas cylinder and the woven gas cylinder. The preparation method comprises the following steps that S1, an inner container with a gentle radian at an end socket is prepared; S2, a plurality of fiber layers are woven on the outer surface of the inner container, the fiber layers are evenly distributed on the outer surface of the inner container, the smooth sand phenomenon is avoided, the weaving angle of the fiber layers changes along with the radius change of the weaving portion, at the polar hole, the weaving angle is a small angle, and the distance between the axial fibers is reduced by weaving at the small angle, so that the condition that the radius at the polar hole is small is adapted, at the end socket section, the weaving angle is increased along with the increase of the radius of the weaving part, and in the cylinder body section, the weaving angle of the cylinder body section under the same fiber layer is maximum and is kept unchanged; S3, resin is poured, cured and formed; and S4, air tightness detection, grinding and polishing treatment are carried out. According to the preparation method, the weaving angle is changed along with the radius change of the weaving part, so that the fiber layers can be uniformly distributed on the outer surface of the inner container, the sand slipping phenomenon is avoided, and the gas cylinder is ensured to have enough strength and strength uniformity.

The invention belongs to the technical field of high polymer material, specifically relates to a material of a noise-reducing and radiating shell of a transformer. The shell material comprises the following raw materials by weight parts: 30-40 parts of polyurethane resin, 15-26 parts of methyl vinyl silicone rubber, 20-35 parts of carbon fiber, 10-20 parts of aluminium oxide,7-12 parts of kieselguhr, 2-8 parts of silicone oil, 0.5-1.5 parts of antioxidant,2-5 parts of 2,5-dimethyl-2,5-dual (tert butyl peroxy)hexane. The noise-reducing and radiating shell material of the transformer provided in the invention has lightweight, high hardness, shock resistance, wearing resistance, ageing resistance and good effects of sound absorption and radiating.

The invention provides a medical self-expanding support. The medical self-expanding support comprises a body and a transition region. The body comprises multiple sets of first circumferential winding lines connected into a whole. Each first circumferential winding line is provided with multiple first sawtooth waveform objects spirally arranged in the circumferential direction. The adjacent first circumferential winding lines are connected through first connecting bridges. Each first sawtooth waveform object comprises two adjacent equal-length first struts and a first top section for connecting the adjacent first struts. The first connecting bridges are connected between the first top sections. The transition region is arranged at the end of the body and comprises a first transition section and a second transition section which are adjacently connected, and the first transition section and the second transition section are connected with the body through second connecting bridges. The support is of a tubular structure and has the shrinking diameter through which the support is arranged in the blood vessel and the expansion diameter through which the support abuts and expands in the blood vessel. The medical self-expanding support is reasonable in structure, convenient to use, high in flexibility and radial and axial strength and good and durable in use effect.

The invention discloses a power transmission line carbon fiber composite core lead core rod, and belongs to the technical field of power transmission line leads. The power transmission line carbon fiber composite core lead core rod is prepared from the following raw materials in parts by weight: 30-40 parts of modified carbon fibers, 12-20 parts of glass fibers, 6-12 parts of polyester fibers, 8-15 parts of silicon nitride, 20-28 parts of polyurethane resin, 205-210 parts of xylene, 15-22 parts of epoxy resin, 5.5-10 parts of curing agent and 1.2-2 parts of surfactant. The surface of the corerod is round, clean and smooth and consistent in color and luster without defect, the tensile strength is over 2663MPa and the elastic modulus is over 130GPa. The core rod can be wound on a 55D-diameter cylinder at a winding speed of not more than 3r/min for one circle and the core rod does not crack or break, the withstand pressure of not less than 30KN in the radial pressure resistance test andthe end part does not crack or peel. The tensile strength of the surface layer is over 2511MPa after the torsion test for 360 degrees, and the surface layer does not crack.

The invention relates to a preparation method of an ultra-large type composite carbon fiber tube. The preparation method of the ultra-large type composite carbon fiber tube is characterized by comprising the following steps that firstly, a mold is manufactured, a mold framework is formed by splicing metal frameworks, a mold skin is fixed to the mold framework, and the outer surface of the mold skin is coated with a mold release agent; secondly, carbon fiber fabric is laid on the outer surface of the mold skin; and thirdly, after standing and solidifying, demolding treatment is conducted.