31results about How to "Improve axial tensile strength" patented technology

The invention relates to a composite core used for a reinforced cable. The composite core comprises an inner core, a structural layer and an outer layer, wherein the inner core comprises fibers and thermosetting resins; the structural layer comprises a fiber sleeving and the thermosetting resins; the fiber sleeving is formed by braiding a plurality of fibers or spirally winding the fibers along the axial direction of the inner core; and the outer layer comprises fibers arranged along the length direction of the composite core and the thermosetting resins. The composite core provided by the invention has the following beneficial effects: the outer layer is added outside the structural layer and the continuous fibers arranged along the length direction of the composite core are added to theouter layer; and the added outer layer wholly covers the structural layer 2 and provides protection to the fiber sleeving in the structural layer 2, under the condition that the composite core is subjected to great tension, the stretch and extension rates of the outer layer 3 and the inner core 1 are basically the same and the extension quantities of the outer layer 3 and the inner core 1 are synchronous, and the structural layer is tightly squeezed by the inner core and the outer layer so that the structural layer in the middle is not easy to drop or separate, thus effectively overcoming thedefect that the composite core adopts the fiber sleeving structure.

The invention discloses a stainless steel corrugated hose connecting device for fuel gas transportation. The stainless steel corrugated hose connecting device for the fuel gas transportation comprises a corrugated hose and a plastic protective sleeve which is arranged on the corrugated hose in a sleeved mode. A plurality of gas-guiding grooves are evenly formed in the plastic protective sleeve. A straight through seat is arranged outside the plastic protective sleeve in a sleeved mode. A sealing ring is arranged between one end of the straight through seat and the plastic protective sleeve. Threads are formed in an inner circle of the other end of the straight through seat. A tool withdrawal groove is formed at the bottom of the threads. Four concave grooves are formed in the threads. A clamping ring is arranged on one side of the tool withdrawal groove, wherein the clamping ring is a metal ring which is divided into two pieces. A ditch groove is formed in an inner circle of the clamping ring. The ditch groove is matched with the corrugated appearance of the corrugated hose. Four bosses are arranged on an outer circle of the clamping ring. The bosses enter the tool withdrawal groove of the bottom of the threads through the four concave grooves, located at the place of the threads, of the straight through seat. A sealing mat is arranged on one side of the clamping ring. The stainless steel corrugated hose connecting device for the fuel gas transportation has the advantages of being convenient to install, high in axial tensile strength and good in sealing property. The stainless steel corrugated hose connecting device for the fuel gas transportation saves inner space and enables a corrugated hose with a larger outer diameter to be capable of adopting standard pipe threads.

The invention discloses a method for preparing a coalbed gas pipeline by adopting a double-angle alternating winding technology. The method comprises the following steps: designing parameters; preparing a resin glue solution; processing a mold; alternately winding and molding; carrying out segmented heating curing; demolding and driving a piton; and fabricating threads. The method is reasonable in design of a whole process, and strong in maneuverability, and can be applied to production of coalbed gas pipelines with different sizes and strength requirements; and the prepared pipeline is excellent in quality. According to the angle alternating winding technology for large-angle and small-angle winding, the tensile strength of the pipeline in the axial direction can be effectively increased by small-angle winding; the defects of circumferential strength can be compensated by large-angle winding, thus the circumferential strength and the failure strength are not greatly weakened when the axial strength of the pipeline is increased; the operating requirements of the coalbed gas pipeline are achieved under the condition that the thickness of the wall is not greatly increased; the production cost is relatively low; the production efficiency is relatively high; and a plurality of defects of the prior art can be overcome.

The invention discloses a marine high-strain welded steel pipe based on a double-phase structure and a preparing method thereof. The marine high-strain welded steel pipe is made by a wide and thick steel plate having the double-phase structure, the steel grade of the high-strain welded steel pipe is L485MO, the thickness is larger than or equal to 25.4mm, the width of the steel plate is pi(1-epsilon)D-2t, D refers to the outer diameter of the steel pipe, t refers to wall thickness, epsilon refers to a cold expanding rate, the radius-to-thickness ratio is smaller than or equal to 30, the yield-to-strength ratio Rt0.5/Rm is smaller than or equal to 0.85, A is larger than or equal to 25%, and UEL is larger than or equal to 7%. The manufactured steel pipe has the characteristics of high strength, high tenacity, high strain capability, low yield-to-strength ratio, low strain aging influence, H2S corrosion resistance, large wall thickness, small radius-thickness ratio, high diameter precision, small outer diameter error and small out-of-roundness error, can fully meet the technical requirements of marine service on the high-strain thick-walled delivery steel pipe, can be used for deep-sea oil and gas exploitation and saves marine development cost.

The invention discloses a rock wool-containing liquid rubber spray coating, and relates to the technical field of spray coatings. The liquid rubber spray coating containing rock wool powder modified by a vacuum process comprises a component A and a component B, wherein the component A is anionic liquid rubber asphalt emulsion; the component B is a coagulant solution; the component A has the solid content of liquid rubber asphalt emulsion of 50-75 weight percent, and comprises the following components in percentage by mass: 1 to 35 percent of rubber emulsion, 10 to 50 percent of asphalt emulsion, 0.01 to 2 percent of anionic dispersing agent, 0.01 to 2 percent of anionic surfactant, and 1 to 60 percent of the rock wool powder modified by the vacuum process; and the component B is an aqueous solution at the concentration of 3-18 percent, which is prepared by mixing calcium chloride and composite aluminum-iron polymer in percentage by mass. The liquid rubber spray coating has high fireproof performance and can achieve good heat preservation effect.

The invention discloses a structure for reinforcing a signal data pipeline of a hypergravity centrifuge. The reinforcing structure is installed on the high-speed rotating arm of the hypergravity centrifuge. The reinforcing structure is installed on the top surface of the high-speed rotating arm. Various pipelines are fixed in the reinforcing structure. The reinforcing structure comprises structural units which are symmetrically arranged on the upper side and the lower side of each pipeline and reinforcing carbon fiber composite layers which are arranged outside the structural units. The structural units on the upper side and the lower side wrap the upper sides and the lower sides of the pipelines respectively. The inner concave parts of the structural units between every two adjacent pipelines are filled up by the reinforcing carbon fiber composite layers. The structural units and the reinforcing carbon fiber composite layers are formed by stacking multiple carbon fiber composite material layers of different fiber arrangements. The signal data line reinforcing structure can overcome the huge pulling force caused by the high-speed rotation of the hypergravity centrifuge in the usingprocess, and prevents the signal data line from being thrown out and broken under the high-speed operation of the centrifuge. The signal data line is fixed firmly and has simple structure.

The invention discloses a reinforced concrete prefabricated part with reinforced plasticity. The reinforced concrete prefabricated part is provided with a plurality of steel bars and a concrete protective layer with sufficient thickness and at the exteriors of the steel bars. The reinforced concrete prefabricated part is characterized in that the reinforced concrete prefabricated part further comprises a carbon fiber reinforced plasticity part consisting of carbon fiber cloth and epoxy bonded resin. The reinforced concrete prefabricated part is characterized in that the carbon fiber reinforcedplasticity part consisting of the carbon fiber cloth and the epoxy bonded resin is placed in the concrete protective layer, the carbon fiber cloth is fixed on the steel bars, and the reinforced concrete prefabricated part with the carbon-containing reinforced plasticity aims to solve deficiencies in the prior art, has the high crack resistance, and meets urgent requirements of use safety for a hydraulic structure in society.

The invention discloses a nuclear power dragging abrasion-resistant cable, comprising an outer sheath, a shock-absorbing sheath, three main wires, three ground wires, multiple filler bars, and a cablecore. The outer sheath is made of a composite chain extender block modified TPU and abrasion-resistant masterbatch. The outer sheath tightly wraps the outer side of the shock-absorbing sleeve. The shock-absorbing sleeve is made of a reinforced natural rubber material. The main wires each include a main wire conductor and a main wire insulation sleeve tightly wrapping the outer side the main wireconductor. The outer periphery of each main wire is provided with an aluminum-plastic composite film. The ground wires each include a ground wire conductor and a ground wire insulation sleeve tightlywrapping the outer side of the ground wire conductor. The cable core is disposed at the center. The main wires are twisted along the cable core in an equilateral triangle with a pitch ratio of 8 to 10. The filling bars fill gaps between the main wires and the ground wires. The filling bars inside the cable can relieve shock multiple times so as to further alleviate the stress, reduce friction damage, improve the structural reliability of the cable, prolong the service life, and achieve higher safety.

The invention belongs to the technical field of structural damage detection and reinforcement, and particularly relates to a carbon fiber structure reinforcement method. Before pasting a carbon fibercloth, the carbon fiber cloth is pre-soaked with an epoxy resin solution, the carbon fiber cloth after immersion is pasted on the surface of a concrete crack with an epoxy resin adhesive, and the carbon fiber cloth is pasted in the direction of the tension or in the direction perpendicular to the cracks. The carbon fiber structure reinforcement method solves the problem that in the prior art, thestrength, rigidity, stability and durability of a structure and a member cannot be well improved in the prior art, and has the beneficial technical effects of improving the strength, rigidity, crack resistance and elongation of the structure and being good in anti-seismic effect and better in reinforcement effect.

The invention provides a large-size aluminum-steel reaction auxiliary heating and toughening friction welding method. According to the method, two-way embedded structure design is conducted on a welding joint of an aluminum component (20) and a steel component (10), and a welding auxiliary layer is arranged at the welding joint. According to the two-way embedded structure design, specifically, an annular steel inner groove (11), an annular steel boss (12) and an annular steel outer groove (13) are sequentially machined in the to-be-welded face of the steel component (10) from a center shaft to the outside, and an annular aluminum groove (21) is machined in the to-be-welded face of the aluminum component. The welding auxiliary layer comprises a reaction transition layer (51), a reinforcing and toughening layer (52) and a reaction auxiliary heating layer (53). The method effectively solves the problems that in the welding process of the steel component and the aluminum component, a large number of brittle intermetallic compounds are likely to be generated, the stress of a welded joint is large, the strength of the welded joint is low, and toughness is poor, friction welding between the large-size aluminum component and the large-size steel component is achieved, the welding efficiency is high, and the welding quality is good.

The invention discloses an iron-aluminum composite steel ring and a manufacturing method thereof. The iron-aluminum composite steel ring comprises a left ring body, a right ring body and a center plate. The left ring body is produced by press forming process, the right ring body and the center plate are produced by aluminum alloy compression molding process, the right ring body is internally provided with a transition ring body; the transition ring body comprises an embedding section and a welding section, wherein the embedding section is connected with the right ring body, and the welding section extends out of the right ring body; when the right ring body and the center plate are produced by compression molding, the transition ring body is served as an embedding piece of a compression molding mold, so that the embedding section located at the right end of the transition ring body is embedded in the right ring body; a shaft sleeve is connected with the right end of the left ring body and the welding section extended out of the right ring body of the transition ring body, and the left ring body and the welding section of the transition ring body are connected and integrated through a welding process; a roll rim is arranged on the edge of the left end of the left ring body, wherein the roll rim turns and rolls towards the circumferential surface of the outer side of the left ring body. According to the iron-aluminum composite steel ring and the manufacturing method thereof, not only can strength of a vehicle rim be guaranteed, and is production efficiency significantly improved to reduce the manufacturing cost, but also the quality grade can be effectively improved to adapt the requirement of high-quality vehicle.

The invention discloses a fast curing epoxy resin system for a glass fiber pultrusion frame and a preparation method of the fast curing epoxy resin system, and belongs to the field of glass fiber processing. The invention relates to a fast curing epoxy resin system for a glass fiber pultrusion frame and a preparation method of the fast curing epoxy resin system. Comprising the following components in parts by weight: 50-75 parts of polybutadiene epoxy resin, 50-75 parts of glycidyl ether type epoxy resin, 15-30 parts of modified toughening particles, 8-12 parts of a curing agent, 30-40 parts of liquid crystal epoxy resin, 25-30 parts of B144 epoxy resin, 10-20 parts of inorganic whiskers, 15-20 parts of a dendritic polymer and 20-25 parts of a high polymer waterproof emulsion. By adding the high polymer waterproof emulsion and the dendritic polymer, the wear-resistant effect of an epoxy resin system is efficiently improved, mechanical connection is facilitated, glass fiber preparation work is carried out, and the working quality is effectively improved.

The invention discloses an axial plate type integrated welding technology for pipes. A metal heating plate is fixed between the welding end surfaces of the two pipes, the pipes are fully fused on theshaft end surfaces after being electrified, heated and pressurized, the pipes are axially fused into a whole, the strength of pipe bodies can be achieved, the areas of the welding end surfaces are increased, the axial tensile strength of pipe connection openings can be enhanced, and the ring stiffness of the pipe connection openings can also be improved. According to the axial plate type integrated welding technology for the pipes, the problem that when the pipes with relatively-thick pipe walls and relatively-large pipe weights are connected, the condition that the tensile strength of the connecting positions is low occurs easily is solved, the problem that the welding surfaces of the pipes are torn due to dragging by large-tonnage ships is solved in the field of marine pipeline laying, and the axial plate type integrated welding technology is suitable for general popularization and use.

The invention relates to a machined terminal structure capable of preventing explosion of a copper wire. The machined terminal structure comprises a cable plug; the right side of the cable plug is provided with a connection part and a wrapping part which are integrally formed through mechanical stamping; an aluminum foil layer is arranged inside the sidewalls of the connection part and the wrapping part; and the outer side of the aluminum foil layer is provided with a steel wire layer. When the machined terminal structure is used, the connection part and the wrapping part which are integrallyformed through mechanical stamping have the advantages of high overall strength and low possibility of being bent and damaged; the aluminum foil layer can increase the axial tensile strength of the connection part and the wrapping part, the steel wire layer can increase the toughness of the connecting part and the wrapping part, and therefore, the problem of the fracture of a wire core caused by an excessively large bending angle can be effectively prevented; first bosses and second bosses can cooperate with each other so as to effectively fix and limit the position of the wire core, so that the fracture of the internal wire core caused by the pulling of a cable can be prevented; and third bosses and fourth bosses can effectively cooperate with each other, so that the problem of the exposure of the wire core (copper wire) caused by rubber sheath shrinkage can be prevented.