13results about How to "High breaking force" patented technology

The invention provides an endoscopic positive negative pressure suction rotary-cut biopsy needle and a biopsy system.The biopsy needle comprises a far-end pipeline part and a near-end handheld part, the near-end handheld part comprises a near-end shell and a rotary-cut knife tube transmission assembly, and the near end of a rotary-cut knife tube is installed in the near-end shell through the rotary-cut knife tube transmission assembly; a negative pressure interface is formed in the near-end wall of the near-end shell; the rotary cutter tube transmission assembly comprises a circumferential rotation transmission mechanism and an axial movement transmission mechanism, the circumferential rotation transmission mechanism comprises a mandrel assembly and a rotating shaft sleeve which are located in the near-end shell, the rotary cutter tube is fixedly sleeved with the mandrel assembly, and the mandrel assembly is sleeved with the rotating shaft sleeve; the rotating shaft sleeve and the rotary cutter pipe are in dynamic sealing through a first dynamic sealing piece; the near end of the rotating shaft sleeve is fixedly and hermetically communicated with a rotating pipe; the rotating pipe is also hermetically communicated with the negative pressure interface through a second dynamic sealing piece; the rotating shaft sleeve is driven to rotate, so that the rotating shaft sleeve drives the mandrel assembly to rotate, and then the rotary cutter pipe is driven to rotate.

The invention belongs to the technical field of cable manufacturing, and discloses a large-section cable for vehicle end bridging, which sequentially comprises a conductor layer, an insulating layer, a shielding layer and a sheath layer from inside to outside, the shielding layer comprises a forward winding type braided shielding wire and a reverse winding type meta-position aramid fiber, the braided shielding wire is formed by twisting a plurality of strands of metal alloy, and the sheath layer is arranged between the conductor layer and the insulating layer. The meta-position aramid fiber adopts stranded meta-position aramid fiber filaments as reverse winding weaving filaments, the sheath layer adopts high-temperature hot drying tunnel vulcanization extrusion type silicone rubber, the temperature of a high-temperature section of a drying tunnel is not lower than 400 DEG C, the vulcanization time is not less than 1 minute, and the meta-position aramid fiber is embrittled and cracked until carbonization failure due to the high temperature of the high-temperature section of the drying tunnel. The cable is suitable for production of a winding shielding layer of a large-section cable for vehicle end bridging with silicone rubber as an insulating layer and a sheath layer, and through introduction of reverse winding meta-position aramid fibers, on the basis of not influencing the use of the whole product, the product structure is further stabilized, and the use stability and safety of the product are ensured.

The utility model discloses a low-temperature anti-cracking novel flexible cable, which comprises at least three groups of conductors, each conductor comprises a plurality of twisted flexible round copper wires, the outer wall of each conductor is coated with an insulating layer, the conductors and the insulating layers form a cable core, the outer wall of the cable core is provided with a filling layer, the outer wall of the filling layer is lapped with a lapped layer in an overlapping manner, and the lapped layer is provided with an insulating layer. The outer wall of the wrapping layer is wrapped by a shielding layer formed by weaving copper wires, the outer wall of the shielding layer is wrapped by a lining layer, the outer wall of the lining layer is provided with an armor layer formed by tightly winding low-carbon steel wires, the outer wall of the armor layer is wrapped by a flame-retardant layer, and the outer wall of the flame-retardant layer is wrapped by an outer protective layer. Soft round copper wires are selected as conductors, so that the stability of electric energy transmission of the cable is improved while the overall flexibility of the cable is guaranteed; irradiation crosslinked polyethylene is adopted for insulation, so that the excellent electrical insulation performance, wear resistance, impact resistance, environmental stress cracking resistance and the like of crosslinked polyethylene are reserved, and the defect that during traditional silane steam crosslinking, steam immerses into the insulation to accelerate oxidation of a conductor is overcome.

The invention relates to the technical field of woven fabrics, and discloses a preparation process of a wear-resistant flame-retardant woven fabric, wherein polyethylene resin, organosilicon DOPO flame retardant, maleic anhydride grafted polyethylene, and antioxidant are placed in a twin-screw extruder for melt extrusion, a film sheet is formed by a cast film machine, and then the film is divided into embryonic yarns by a flat yarn machine, stretched, and shaped to obtain wear-resistant flame-retardant polyethylene flat yarns. The organosilicon DOPO flame retardant of the invention contains DOPO and siloxane flame retardant structures in the polymer molecular chain of the flame retardant to form a phosphorus silicon flame retardant system, thereby improving the limiting oxygen index of the flat yarn woven fabric and having better flame retardant properties. The invention adds a compatibilizer maleic anhydride grafted polyethylene to make the organosilicon DOPO flame retardant and the polyethylene resin have better compatibility, which is beneficial to improving the mechanical properties of the woven fabric, and showing higher tensile strength, elongation at break, and wear resistance.

According to the composite steel wire rope for mine hoisting and the manufacturing method of the composite steel wire rope, the center strand is made of the aramid fibers, meanwhile, the rope core strand formed by twisting the filaments formed by melting and drawing various high-strength fibers is twisted outside the center strand, and the strength and the tensile property of the composite rope core are greatly improved; and the high-toughness corrosion-resistant steel wire rope has good toughness and corrosion resistance, and is suitable for mine environments and high-load applications thereof. Meanwhile, a graphite fluoride coating is arranged outside the inner-layer strand, and a polytetrafluoroethylene coating is arranged outside the outer-layer strand, so that the friction among the inner-layer strand, the outer-layer strand, the filling strand and the special-shaped steel wires during use can be reduced, and the inner-layer strand and the outer-layer strand have excellent corrosion resistance; the inner-layer strands and the outer-layer strands can keep good performance in a severe environment; in addition, through filling of the filling strands and the special-shaped steel wires, the compactness of the steel wire rope is increased, the whole structure of the steel wire rope is firmer, tighter and more pressure-resistant, and the mechanical property of the steel wire rope is improved.

The invention discloses application of itaconic acid in preparation of a product for repairing damaged hair and a composition of the itaconic acid, the composition comprises itaconic acid and a pH regulator, and the pH regulator is sodium hydroxide or arginine. The invention proves that the itaconic acid and the composition thereof have the characteristics of repairing hair cores and strengthening and toughening hair.

This utility model relates to the field of wire and cable technology and discloses a high-strength, tensile-resistant, and wear-resistant wire, including a wear-resistant sheath. Spherical protrusions are fixedly connected to the surface of the wear-resistant sheath, and reinforcing strips are fixedly connected to the inner cavity of the sheath. This utility model significantly improves the dynamic durability and resistance to mechanical damage of the wire through a multi-layer composite structure design. The three-layer composite sheath, combined with the surface spherical protrusions, forms a gradient wear-resistant system, improving wear resistance compared to traditional single-layer sheaths. Simultaneously, the aramid galvanized steel wire braided structure of the inner support layer and the anti-slip texture within the insulation layer's holes form a three-dimensional interlock, solving the problem of interlayer slippage caused by repeated bending. The multi-strand tinned copper wire strands in the conductor layer work synergistically with the reinforcing strips of the inner support layer, significantly increasing the wire's tensile strength at break and meeting the requirements of extreme working conditions. Furthermore, the precise engagement of the spiral protrusions and anti-slip textures effectively absorbs torsional stress, effectively improving the wire's service life.

The impact-resistant and rotation-resistant galvanized steel wire rope for the ocean engineering crane comprises an inner-layer steel wire rope center strand, an inner-layer strand is arranged on the outer circumference of the inner-layer steel wire rope center strand, and a plurality of steel wire rope outer-layer strands are evenly arranged on the outer circumference of the inner-layer strand. The space between the inner-layer steel wire rope center strand and the inner-layer strands and the space between the inner-layer strands and the steel wire rope outer-layer strands are filled with solid polymers. According to the steel wire rope, the problems of twisting and bottom layer crushing in the use process of a large-specification maritime work crane steel wire rope are solved.

The invention discloses a steel wire cord with a 1 + N strand structure and a preparation method of the steel wire cord, and belongs to the technical field of steel wire cords, the steel wire cord comprises a core strand, and the core strand comprises a core strand inner layer steel wire located on the inner layer and a core strand outer layer steel wire located on the outer layer; the N sheath plied yarns are uniformly arranged around the core plied yarn, the sheath plied yarns and the core plied yarn are stranded to form a rope, and each sheath plied yarn comprises a sheath plied yarn center wire located on the inner layer and a sheath plied yarn outer-layer steel wire located on the outer layer; the outer wrapping wire is wound on the outer surface of the rope; according to the invention, the extraction force of the core strand of the steel wire cord is improved structurally, the problem of piercing caused by migration of the core strand can be effectively prevented, and the service life of a tire is greatly prolonged.

The invention provides a negative pressure suction rotary cutting biopsy needle and a biopsy system.The biopsy needle comprises a far-end pipeline part and a near-end handheld part, the far-end pipeline part comprises a rotary cutting knife tube, and the near-end handheld part comprises a near-end shell and a rotary cutting knife tube transmission assembly; the rotary cutting knife tube is connected into the near-end shell through the rotary cutting knife tube transmission assembly, and the rotary cutting knife tube is made to rotate in the circumferential direction and move in the axial direction by driving the rotary cutting knife tube transmission assembly. The near end of the near-end shell is provided with a negative pressure connector used for being communicated with a negative pressure device, a connecting sleeve is arranged in the near-end shell, the near end of the connecting sleeve is communicated with the negative pressure connector in a sealed mode, the near end of the rotary cutting knife tube is inserted into the connecting sleeve from the far end of the connecting sleeve, and in addition, the near end of the rotary cutting knife tube is connected with the negative pressure connector in a sealed mode. The connecting sleeve and the rotary cutter pipe are in dynamic sealing through a dynamic sealing piece.

The utility model belongs to the field of oil field application, and relates to a composite material electric heating rod body structure for an oil field, which is composed of a composite material supporting inner core, an inner layer braided copper wire gauze, a carbon fiber electric heating wire layer and an outer layer braided copper wire gauze. According to the heating rod, the flexible carbon fiber woven mesh serves as an electric heating carrier, so that the heating rod has high breaking force. In addition, the heating rod is wrapped by a plurality of insulating layers, so that the insulating property of the heating rod meets the IP58 protection grade requirement, and the sealing performance is excellent.

The utility model relates to the technical field of stealth bionics, and discloses a stealth cloak which adopts a one-piece pullover type design and a pullover head opening cylinder design. And snap fasteners and air holes are arranged on the side edges. The invisible cloak comprises a cloak body, a hidden pocket, a cap and a storage bag. The invisible cloak is formed by cutting and sewing infrared invisible fabric; the infrared stealth fabric is made of photonic crystal coating base cloth; the cloak body and the cap are of an integrated structure. The inner layer of the photonic crystal coating base cloth is coated to form a waterproof layer; a flame-retardant layer is also arranged between the base cloth and the waterproof layer; a plurality of groups of three-dimensional bionic layers are sewn on the outer surfaces of the cloak body and the cap, and the three-dimensional bionic layers are made of the same material as the cloak body and the cap. The multifunctional invisible clothes have visible light and infrared stealth, waterproof and flame-retardant functions, and also have the advantages of being convenient to put on, take off, store and carry.

The invention relates to a three-strand structure anti-rotation steel wire rope with the diameter phi of 26 mm and a manufacturing method thereof. The steel wire rope adopts a three-strand structural design, a strand core is made of polypropylene, 48 steel wires are arranged in each strand, the steel wires in the strands are arranged in a point and line contact composite structural design, and the steel wires are twisted twice in three layers. After the steel wire rope is twisted, a forging process is adopted, and the breaking force of the whole rope is 14% higher than that of a four-strand steel wire rope of the same specification; compared with a four-strand steel wire rope of the same specification, the twisting radius of the strands is 15%-18% smaller, and therefore the steel wire rope has better rotation resistance.