135results about How to "Improve buckling resistance" patented technology

A retrieval catheter having a wall that defines a catheter lumen and a distal tip that is tapered towards an open distal orifice that defines the distal end of the lumen, the wall over the length of said tapered tip being distensible to allow the orifice to expand, and a distender within the lumen that can be urged distally along the lumen such that the distender presses radially outwardly the catheter wall within the distal tip, so as to distend said orifice.

The invention discloses a multi-component high-performance sizing agent. The sizing agent is prepared from various raw materials by a mixing reaction, wherein the raw materials comprise corn starch, phosphate, tween, persulfate, and at least one of phosphorus oxychloride and epoxy chloropropane. The sizing agent has the characteristics that the adhesion force is high, the film-forming ability is high, a serous film is coriaceous, the elasticity is high, the bending resistance (fatigue resistance) is improved by 3 to 4 times compared with a common modified starch sizing agent, and the abrasion resistance and the ageing resistance are high. The serous liquid is not frozen, caked or layered at normal temperature, and has high liquidity and stable viscosity. The sizing agent has no polyvinyl alcohol; when the sizing agent is sized on spinning cotton yarns; for the variety with general tightness, the polyvinyl alcohol does not need to be used for less than 50 yarns; or no or less polyvinyl alcohol is used for sizing on polyester cotton or over 50 cotton yarns; the yarns are easy to desize; the serous liquid waste water is easy to treat; the environment pollution is low; and the production process has zero pollution emissions.

The invention discloses cation high performance slurry. The slurry is formed by commixture reaction of raw materials including corn starch, sodium hydroxide, trimethylamine hydrochloride and persulfate with the following quality content: 80-95% of the corn starch, 1-10% of the sodium hydroxide, 1-15% of the trimethylamine hydrochloride, and 0.1-15% of persulfate. The cation high performance slurry has the advantages of strong adhesive force, good film formation property, tenacious chorion and good elasticity, the flexibility (anti-fatigue property) is improved by 3-4 times compared with common modified starch slurry, the cation high performance slurry has good wear-resisting property and ageing resistance, and a serous fluid has good liquidity and stable viscosity under an I normal temperature condition; and the slurry contains no polyvinyl alcohol, when a spinning purified cotton yarn is subjected to a sizing process, a variety with 60 yarns with common compactness can be processed without polyvinyl alcohol, when sash cotton or purified cotton yarn with more than 60 yarns is subjected to sizing process, little polyvinyl alcohol or no polyvinyl alcohol is used, desizing is easy, waste water of serous fluid is easy to process, pollution of the waste water to the environment is small, and zero-pollution discharge in the production process is realized.

The invention discloses cation high-performance size which is made from the following raw materials: corn starch, hydroxides, trimethylamine hydrochloride and persulfate through a hybrid reaction, wherein corn starch accounts for 80%-95% by weight, calcium hydroxide and / or magnesium hydroxide account(s) for 1%-10% by weight, trimethylamine hydrochloride accounts for 1%-15% by weight, and persulfate accounts for 0.1%-15% by weight. The cation high-performance size has the advantages of strong adhesive ability, good film forming property, tough size film, and excellent elasticity; the flexibility (fatigue endurance) is improved by 3-4 times in comparison with common modified starch size; the cation high-performance size is excellent in wear-resisting and anti-aging properties; and the size has good flowability under the condition of normal temperature, and is stable in viscosity. Polyvinyl alcohol is not used. When pure cotton yarns are sized during spinning, 60-count yarns of common tightness do not need polyvinyl alcohol, and when polyester or pure cotton yarns higher than 60-count are sized, no polyvinyl alcohol is needed or only a small amount of polyvinyl alcohol is needed, so that desizing is easy, the size waste is easy to process and causes small pollution to the environment; and zero pollution emission is realized in a production process.

Disclosed are a separator for a rechargeable lithium battery including a porous substrate and an adherence porous layer on at least one side of the porous substrate, and including a first fluorovinylidene-hexafluoropropylene copolymer, a second fluorovinylidene-hexafluoropropylene copolymer, and filler particles, and a rechargeable lithium battery including the same.

In a heat exchanger having a core portion in which aluminum flat tubes and aluminum fins are disposed alternatively and brazed with each other, each fin has one side portion located at one side of the tube and the other side portion located at the other side of the tube. The one side portion of the fin is higher in pitting potential than the other side portion of the fin, and the pitting potential difference between the one side portion of the fin and the other side portion of the fin is 40 to 200 mV. The pitting potential difference can be formed by the Zn concentration difference in the aluminum alloy constituting the fin.

The invention discloses a component of copolymer using in complex inorganic nanoparticles and relates to the pulp and sizing production and process technology of spinning warp sizing and paper-making glue processes. The said copolymer is a kind of ionic acrylic polymers and it is made of ionic monomers, hydrophilic monomers, acrylate monomers and few other monomers by free radical copolymerization reaction, or is made of polyacrylamide as the raw material by macromolecular chemical reaction. The said copolymer is used to prepare a new slurry component which substantial replaces PVA in the spinning warp sizing and paper-making glue processes. The said slurry contains of the mixture in a proportion of 0.1-50 % of copolymer, 0.1-50 % inorganic nanoparticles and residual water.

A child safety buckle used in a child restraint includes structural support and selected materials to resist deformation or failure when subjected to impact or compressive forces. The buckle may have a child resistant feature that is more tolerant to impact or compressive forces due to the structural support and material selection. The structure may include thickened walls or added arcuate portions or ribs. The material can be impact modified nylon to improve durability while resisting deformation and cracking. The resulting buckle design is more robust in harsh environments, while providing consistent operation for restraining a child.

A retrieval catheter (30) for retrieving from a bodily lumen a device (48) attached to the distal end of a pull line (16), the catheter having a wall (32) that defines a catheter lumen (22) and a distal tip (36) that is tapered towards an open distal orifice (38) that defines the distal end of the lumen, the wall over the length of said tapered tip being distensible to allow the orifice to expand, the catheter having: a distender within the lumen that can be urged distally along the lumen such that the distender presses radially outwardly the catheter wall within the distal tip, so as to distend said orifice; the distender having a distal end annulus and a proximal end annulus (42) separated by a radially outward-facing circumferential wall and an axial lumen extending through the distender between said distal and proximal annuli; a pusher shaft (46) that extends from the distender proximally along the catheter lumen to proximally beyond the proximal end of the catheter lumen and that is arranged to push the distender distally until the distal end annulus is distal of the catheter distal orifice and the open distal orifice of the catheter is distended; whereby, with said pull line extending from the device to be retrieved through the lumen of the distender and the lumen of the catheter, the device can be pulled proximally by the pull line relative to the catheter until at least the most proximal part of the device slides over the distal end annulus of the distender into the lumen of the distender.

The invention discloses a composite beam comprising a steel beam with concrete at the abdomen. The composite beam comprises a steel beam (1) and a floor plate (7), wherein the concrete (5) is poured at the abdomen of the steel beam (1); the outer wall of the concrete (5) is flush with the outer sides of an upper flange and a lower flange of the steel beam (1); a steel reinforcement cage (4) is embedded at the abdomen of the steel beam (1); an abdomen shearing force connecting piece (3) is welded at the abdomen of the steel beam (1); reliable bonding and joint working of the concrete at the abdomen of the steel beam and the steel beam (1) are ensured through the abdomen shearing force connecting piece (3); outer shearing force connecting pieces (2) are welded at the outer side of the upper flange of the steel beam (1); and combination and joint working of the steel beam (1) and the floor plate (7) are realized through the outer shearing force connecting pieces (2). Compared with the prior art, the combination with the floor plate is taken into account, the whole bearing capacity and rigidity are improved, the section height of a member is decreased, and the building clearance is increased, so that the economic performance is greatly improved.

A compliant pin for use with a shielding cage or electrical connector is disclosed that has improved insertion capabilities that increase the resistance of the compliant pin to buckling during mounting of the cage or connector to a circuit board. The pin has a base and tip portion that are interconnected together by a body portion. An opening is disposed in the pin body portion and the top edge of the opening is positioned at a level therein that is spaced apart from and beneath the top surface of the circuit board. In another embodiment, the pin opening is generally non-symmetrical with a configuration that approximates a triangle, i.e., the wider base portion of the pin opening is closer to the pin tip portion than the narrower, apex portion of the pin opening.

A compliant pin for use with a shielding cage or electrical connector is disclosed that has improved insertion capabilities that increase the resistance of the compliant pin to buckling during mounting of the cage or connector to a circuit board. The pin has a base and tip portion that are interconnected together by a body portion. An opening is disposed in the pin body portion and the top edge of the opening is positioned at a level therein that is spaced apart from and beneath the top surface of the circuit board. In another embodiment, the pin opening is generally non-symmetrical with a configuration that approximates a triangle, i.e., the wider base portion of the pin opening is closer to the pin tip portion than the narrower, apex portion of the pin opening.

A new type of vacuum balloon. A layered wall structure is used, including a relatively thick honeycombed section sandwiched between and bonded to two relatively thin layers. This layered wall design is used to form a thin-walled sphere having greatly enhanced resistance to buckling. Using this approach it is possible, with existing materials, to create a rigid vacuum balloon having positive buoyancy.

The invention relates to a rod type core bar bending restrain steel support which solves the problems of large difference of rigidity and stability of all directions of an energy dissipation section of the traditional bending restrain support, difficult support installation and complex restrain construction. A core main stress part comprises an energy dissipation section, conversion sections and an installation section, wherein the energy dissipation section is a solid steel bar or hollow steel pipe; an outer restrain steel part comprises a local restrain steel member and an integral restrain steel member, the local restrain steel member comprises a core bar steel sleeve, the integral restrain steel member comprises a delay steel frame fixed outside the core bar steel sleeve and an auxiliary steel cylinder; one section of the two conversion section is in friction contact with the steel cylinder of the conversion section and a gap is remained between the core bar steel sleeve and the delay steel frame. The section of the energy dissipation section of the support has uniform size in all directions, which eliminates the difference of the rigidity and the stability of different directions, thus the local stable bearing capacity and the integral bending-preventing capacity are high, and the working reliability under large axial direction strain and strong shock is high; and the rod type core bar bending restrain steel support is convenient for installation, and is suitable for engineering earthquake fortification and reinforcement.

An object of the present invention is to provide a control cable having an outer casing provided with helically twisted metallic wires. The outer casing is light-weight, has a satisfactory buckling resistance, and can suspend generation of a vibrational noise. A control cable (1) is provided with an outer casing (2) and an inner cable (3). The outer casing (2) is provided with a liner (21), a plurality of wires (22) helically twisted around the liner (21), and a covering layer (23) formed on an outer side of the wires (22) in a radial direction of the outer casing (2). The material of the wires (22) is an aluminum alloy, and the pitch of the wires (22) is 10 to 35 times an outer diameter of a shield.

The invention provides a shear wall comprising a first wall body. The first wall body comprises a first wall plate, a bottom plate, multiple first stiffening ribs and multiple second stiffening ribs.The first wall plate is arranged in a vertical direction, the first stiffening ribs are fixedly connected to a side of the first wall plate and are flat plate pieces, the first stiffening ribs are arranged along the transverse direction of the first wall plate and are parallel to the horizontal plane, and the first stiffening ribs are arranged with intervals along a vertical direction from the topof the first wall plate to the bottom. The second stiffening ribs are arranged in a vertical direction and are L-shaped. The first wall body is provided with L-shaped through holes in a vertical direction, each of the first stiffening ribs passes through an L-shaped through hole, the second stiffening ribs are sleeved in the L-shaped through holes are inserted into the first stiffening ribs, thebottoms of the second stiffening ribs are in contact with the top of the bottom plate, one plate of each of the second stiffening ribs is parallel to the first wall plate, and the other plate of eachof the second stiffening ribs is perpendicular to the first wall plate. According to the shear wall, the buckling-restrained ability of the shear wall can be improved.

The invention discloses a functional textile sizing agent. The agent comprises the following components of starch, a plasticizer, a crosslinking agent, sodium hydroxide, hydrochloric acid and water. Moreover, the invention further discloses a preparation method of the sizing agent. The method comprises the following steps of: performing reaction by adopting a screw extrusion machine, and shearing and degrading the starch at high temperature and high pressure so as to form high concentration and low viscosity paste; meanwhile, plasticizing to enable a formed sizing film to have high strength and toughness, wherein the sizing film has good wear resistance and flexible resistance as well as strength even higher than polyvinyl acetate (PVA) in a sizing process. Moreover, the crosslinking molecular weight is increased, hydrophilic hydroxyls are greatly closed, the fiber adhesive force is increased, the hygroscopicity of the sizing film is reduced, and the mutual adhering probability of yarns is decreased.

The invention discloses an assembling type frame structure joint which is applied to compound hollow steel tube concrete. The assembling type frame structure joint comprises a tenon column steel tube and a pier column steel tube. Concrete is added into the pier column steel tube to form a pier column. Concrete or steel ribs and concrete is or are added into the tenon column steel tube to form a tenon column. The tenon column is sleeved in the hollow pier column steel tube with the same axis, and two ends of the tenon column stretch out of the pier column steel tube. The tenon column is fixed in the pier column through the concrete added into the pier column steel tube. An outer wall adaptive position of the pier column is provided with at least one splitting plate. The assembling type frame structure joint has the advantages of being high in bearing capacity, simple inn structure and easy to machine. A novel assembling type frame structure is formed based on the joint. The novel assembling type frame structure can express advantages of compound hollow steel tube concrete members, promotes application and popularization, and satisfies requirements for rapid development of assembling type buildings currently in China. Advantages of high construction speed, small dead load, high bearing capacity and good fire resistance are achieved.

The invention discloses a double-webbed H type steel, and a connecting node of the double-webbed H type steel and a concrete prefabricated slab. The double-webbed H type steel comprises two flange slabs and two webs, wherein the two flange slabs are in parallel; the two webs are in parallel and are perpendicularly and fixedly connected between the two flange slabs; the two webs and the two flangeslabs form a cavity. According to the H type steel, the material consumption can be reduced, and the integrality is good. According to the connecting node of the double-webbed H type steel and the concrete prefabricated slab, the prefabricated slab and a steel structure are connected through a lateral connecting rib, a first reinforced connecting rod and a poste-poured concrete, so that the integrality and the shock resistance of the connecting node are effectively improved.

The invention relates to a rod type core bar bending restrain steel support which solves the problems of large difference of rigidity and stability of all directions of an energy dissipation section of the traditional bending restrain support, difficult support installation and complex restrain construction. A core main stress part comprises an energy dissipation section, conversion sections and an installation section, wherein the energy dissipation section is a solid steel bar or hollow steel pipe; an outer restrain steel part comprises a local restrain steel member and an integral restrainsteel member, the local restrain steel member comprises a core bar steel sleeve, the integral restrain steel member comprises a delay steel frame fixed outside the core bar steel sleeve and an auxiliary steel cylinder; one section of the two conversion section is in friction contact with the steel cylinder of the conversion section and a gap is remained between the core bar steel sleeve and the delay steel frame. The section of the energy dissipation section of the support has uniform size in all directions, which eliminates the difference of the rigidity and the stability of different directions, thus the local stable bearing capacity and the integral bending-preventing capacity are high, and the working reliability under large axial direction strain and strong shock is high; and the rodtype core bar bending restrain steel support is convenient for installation, and is suitable for engineering earthquake fortification and reinforcement.

The invention discloses an assembled frame system with a concrete filled steel tube branch limb combined special-shaped column and a shock absorption wall and belongs to the field of building structure techniques and earthquake resistance and shock absorption of structures. The system primarily comprises a round concrete filled steel tube long column welded steel batten plate, and a prefabricatedcorner column, a prefabricated side column, a prefabricated middle column, a reinforced concrete beam, a steel plate wall, a prefabricated steel floorslab, a column-column connecting sleeve, a column-beam anchoring part, a middle column-beam anchoring part, a beam-plate connecting part, ECC post-cast strips and the like prepared by pouring concrete outside. Upper and lower concrete filled steel tubes are connected through the column-column connecting sleeve, and the column-beam anchoring part, the middle column-beam anchoring part and the round concrete filled steel tube long column are connected and prefabricated through dowels, so that the beam-column node connecting performance is enhanced. The ECC post-cast strips are arranged at two ends of the beam and the wall and are poured up anddown in a penetrating manner, so that the energy consumption ability and the anti-earthquake performance of the structural system are improved. The assembled frame system achieves the functions of hiding column edges and being attractive in building, a project is simple and rapid to construct, the construction efficiency is high, the nodes are connected stably and reliably, and the structural system is good in anti-earthquake performance.

The invention provides a fan blade which comprises a sealed fan shell body. The fan shell body is formed by an upper shell and a lower shell in a butt joint mode. A shearing resistance web is arranged inside a cavity formed by the fan shell body. The top end and the bottom end of the shearing resistance web are respectively and fixedly connected with a beam cap on the upper shell and a beam cap on the lower shell. A connecting body is arranged between the shearing resistance web and the rear edge of the fan blade inside the cavity, and the connecting body is respectively and fixedly connected with the upper shell and the lower shell. The fan blade improves the bulking resistance capacity of the rear edge of the fan blade, the tackless phenomenon at the position of the rear edge of the fan blade is effectively avoided through fixed connection between the upper shell and the connecting body and the fixed connection between the lower shell and the connecting body, failures caused by insufficient stability of the rear edge of the fan blade are prevented, and therefore normal power generation of a wind turbine generator is guaranteed.

The invention discloses a fiber fabric with high buckling resistance. The fiber track of the fiber fabric is a sine curve or a cosine curve which is obtained by offsetting the fiber fabric along a certain direction (y axle), and a functional equation of the fiber track is shown as yn=asibx+Kn or yn=acosbx+Kn, wherein the a and the b are positive real numbers, the n is a positive integer, and the Kn is a positive real number and is not equal to Kn+1. Compared with a fiber fabric with a parallel and smooth fiber track in the prior art, the fiber fabric has the advantages of parameterized fiber directions, high designability, capability of obviously improving the buckling resistance, suitability for mass production and the like; and a fiber composite material part prepared by the fiber fabric has high buckling resistance and a simple preparation method, and fiber materials are not wasted nearly, so that the cost is greatly reduced.

The invention relates to a rotor blade for wind energy installation, comprising at least one flange running in a longitudinal direction from a rotor blade root to a rotor blade tip, whereby a width of the flange decreases along the longitudinal direction. The invention also relates to a method for producing a rotor blade in that at least one flange with a width decreasing in the longitudinal direction is applied to a rotor blade inner wall, and to a laying assistance device for positioning strips of the flange.

The invention discloses a large length-diameter ratio plane metal microneedle array, a preparation method and clamping and penetration auxiliary devices of the large length-diameter ratio plane metalmicroneedle array, and belongs to the technical field of medical instruments. A large-sized metal sheet is cut into small-sized metal sheets; a clamping tool consisting of an upper metal cover plate and a lower metal cover plate is machined, wherein the inner sides of the upper metal cover plate and the lower metal cover plate of the clamping tool are provided with grooves, and the metal sheets are placed in the grooves and fastened through bolts; and the geometric shape and the size of the microneedle array are designed, and linear cutting is performed on the tool and the metal sheets as a whole to obtain the plane metal microneedle array with a plurality of microneedle bodies. In addition, the invention also provides the assembly clamping device and the penetration auxiliary device of the large-aspect-ratio plane metal microneedle array. The assembled penetration auxiliary device is placed on the skin, and the microneedle array penetrates into the skin through the auxiliary device. The microneedle array can be manufactured in large batches through simple assembly, the cost is low, the efficiency is high, and the processing precision of microneedle tips can be guaranteed; and moreover, the use reliability of large length-diameter ratio microneedles can be comprehensively improved.

The invention provides a tube-in-tube bridge tower of a space hybrid cable net suspension bridge with a parabolic arched tower cap. The tube-in-tube bridge tower of the space hybrid cable net suspension bridge with the parabolic arched tower cap is characterized in that the parabolic arched tower cap with a rigid tie rod is arranged at the top of a tube-in-tube herringbone tower column; one end ofa giant diagonal bracing is anchored to the waist of the tube-in-tube herringbone tower column; the giant diagonal bracing supports the arch foot of the parabolic arched tower cap and forms a racket-like bridge tower structure; a load-bearing steel cable is placed on the tube-in-tube herringbone tower column, and a carbon fiber space cable net is anchored on the parabolic arched tower cap to enhance the spatial stiffness of the suspension bridge and realize the cooperation between two groups of cables; a concrete-filled rectangular steel tube corner column and a grille tubular double-steel concrete composite shear wall are adopted to form a tube structure; the tube-in-tube herringbone tower column comprises an outer tube structure, a core tube structure and multiple rigid diaphragms. Thetube-in-tube bridge tower of the space hybrid cable net suspension bridge with the parabolic arched tower cap has various advantages, such as strong structural rigidity, good wind resistance stability, rich facade modeling, strong earthquake resistance, and capability of being adopted as a bridge tower structure of a space cable net suspension bridge with a super-long span of 4000 meters.

The invention discloses an anti-seismic crisscross-inclined-slot corrugated-steel-plate shear wall. The shear wall comprises frame beams, frame columns, corrugated steel plates, high-strength bolts and steel base plates and is characterized in that the two frame beams and the frame columns are fixed together through welding to form a shear wall frame in an enclosed manner; each corrugated steel plate is square and provided with a plurality of inclined slots; the four corners of each corrugated steel plate are provided with bolt holes; two layers of corrugated steel plates are connected through the high-strength bolts to form double-layer crisscross-inclined-slot corrugated steel plates; the double-layer crisscross-inclined-slot corrugated steel plates are placed in the shear wall frame and fixed in the same through welding; the steel base plates are arranged between the corrugated steel plates and the high-strength bolts. The anti-seismic crisscross-inclined-slot corrugated-steel-plate shear wall has the advantages that the anti-seismic performance of the corrugated-steel-plate shear wall can be increased, the lateral deformation resistance loss, caused by the bending failure of the corrugated-steel-plate shear wall, of the corrugated steel plates is reduced, and local structural failure, casualties and property loss are avoided.