9results about How to "Super elastic" patented technology

The utility model provides a working end of an expansion orthosis and the expansion orthosis, and relates to the technical field of medical instruments. The dilation orthosis working end comprises an outer tube and a pull rod arranged in the outer tube, an elastic piece is arranged at the front end of the pull rod, a receding opening is formed in the outer tube, when the pull rod is pushed forwards, the elastic piece can bulge out of the receding opening, and a first bending part is arranged at the rear end of the elastic piece. A mounting groove formed in the pull rod divides the front end of the pull rod into a first clamping plate and a second clamping plate, and the mounting groove sequentially comprises a clamping part and a limiting part used for containing the first bent part from front to back. The pull rod is sleeved with a locking ring, and the first clamping plate and the second clamping plate clamp the elastic piece under the locking effect of the locking ring. According to the working end of the expansion orthosis, the elastic piece and the mounting structure of the elastic piece are improved, and the technical problem that materials with poor machining performance cannot serve as the elastic piece to be applied to the expansion orthosis is solved.

The invention relates to the technical field of medical instruments, and discloses a preparation method of a customized mitral valve forming ring. The technical problems that in the prior art, the specification and model selection of a mitral valve forming ring is limited, and the valve ring cannot be completely matched with the physiological structure of a patient are solved. The method comprises the following steps: obtaining shape parameters of a mitral valve forming ring at a lesion of a patient through multi-modal imageology imaging; a three-dimensional model of the diseased region is constructed, a lesion model is reconstructed, and a healthy mitral valve forming ring structure model is obtained; fusion printing forming is conducted through a micro-scale laser powder bed, a laser beam is scanned according to a certain strip width, and in the fusion process of each layer, the laser scanning path rotates by a certain angle relative to the scanning path of a base plate or the scanning path of the previous layer. It is guaranteed that the artificial mitral valve ring can be perfectly matched with the physiological structure of a patient, and individual differences are reduced.

A low-NOx ammonia-coal stable combustion swirl burner relates to the field of clean combustion of coal with low carbon and low NOx. This invention addresses the problems of ammonia slip and high NOx emissions in existing ammonia-coal co-combustion technologies. In this invention, a primary air / pulverized coal duct is fitted onto a central NH3 duct, forming a primary air channel between them. An outer NH3 duct is fitted onto the primary air / pulverized coal duct, forming an NH3 channel between them. An inner secondary air duct is fitted onto the outer NH3 duct, forming an inner secondary air channel between them. An outer secondary air duct is fitted onto the inner secondary air duct, forming an outer secondary air channel between them. Tangential and axial blades are respectively installed in the inner and outer secondary air channels. This invention is used for pulverized coal swirl combustion.

The application relates to a wood-based special material constructed by curled fibers and a preparation method and application thereof, and belongs to the technical field of aerogel materials. The application aims to solve the problems of large brittleness, poor thermal-mechanical stability and single function of existing ceramic aerogels in extreme environments. The wood-based special material constructed by curled fibers is composed of a three-component network of silicon carbide nanoparticles, carbon nanotubes and cellulose nanosheets; the cellulose nanosheets form a micro-coil structure, the silicon carbide nanoparticles are loaded on the surface of the cellulose nanosheets, the carbon nanotubes are interwoven between the cellulose nanosheets and the silicon carbide nanoparticles, and the three components jointly construct a three-dimensional network with a cross-scale hierarchical porous structure. The application relates to the application of the wood-based special material constructed by curled fibers in aerospace thermal protection, electromagnetic shielding, heat insulation, flame-retardant materials or deep space exploration equipment. The application does not need supercritical drying or high-temperature sintering, has low energy consumption and is suitable for large-scale preparation.

This invention relates to the field of medical care technology and discloses a shape memory alloy (NiTi) hip replacement proximal femoral anti-fracture device. It includes a fitting body, with a first clamping arm fixedly disposed at the mid-front end of the fitting body. A fourth connecting mechanism and a sixth connecting mechanism are fixedly disposed at the front end of the fitting body, symmetrically arranged on the upper and lower sides of the first clamping arm. This invention is simple to operate, provides firm fixation, and is practical and reliable. NiTi shape memory alloy possesses shape memory effect, superelasticity, and good biocompatibility. Using NiTi shape memory alloy as the raw material to prepare the encircling device, it is in a flat, extended state at low temperatures and recovers its designed curved shape after heating, firmly and effectively encircling the lesser trochanter. It is mainly applied in hip replacement surgery for elderly patients with femoral neck fractures and osteoporosis, effectively preventing proximal femoral splitting during femoral prosthesis wear.

The invention provides a polymer electrolyte, an electrochemical device and a preparation method. Specifically, the polymer electrolyte is formed by polymerizing a polymer containing at least two active hydrogen functional groups, a hexamethylene diisocyanate tripolymer, furfuryl alcohol, bismaleimide and a lithium salt. The polymer electrolyte has superelasticity, self-healing performance and reproducible processing performance, so that the polymer electrolyte not only can adapt to the change of an electrode structure in a lithium metal circulation process, but also has good mechanical performance, and plays a role in inhibiting the growth of lithium dendrites.

The invention discloses a tooth orthodontic wire based on a 4D printing technology and a preparation method thereof, and the preparation method comprises the following steps: step 1, printing by adopting a selective laser melting method to obtain a printed tooth orthodontic wire; and step 2, carrying out solution treatment on the printed tooth orthodontic wire, and then carrying out water cooling to obtain the tooth orthodontic wire based on the 4D printing technology, the tooth orthodontic wire prepared by the method has the advantages of low cost, high efficiency, high precision, long service life, high practicability and the like.

A dual-purpose moisture absorption and sweat releasing anti-sagging cushion support comprises a cushion support body, the cushion support body is formed by sequentially connecting a first bamboo fiber fabric layer, a jelly glue layer, a cotton lining paper layer and a second bamboo fiber fabric layer from the front face to the back face, bonding skirt edges are arranged on the two sides of the back face of the cushion support body respectively, and biological adhesive layers are arranged on the surfaces of the bonding skirt edges. And a transverse anti-slip strip for connecting the two bonding skirts is arranged between the two bonding skirts.

The present invention discloses a bionic thermal insulation, noise reduction and fireproofing integrated nanofiber aerogel and a preparation method thereof, and belongs to the technical field of fiber aerogel. The preparation method of the bionic thermal insulation, noise reduction and fireproofing integrated nanofiber aerogel of the present invention comprises the following steps: mixing silica sol and water to obtain a premixed liquid, then adding a hydrophilic colloid and SiO2 nanofibers, mixing evenly, and obtaining a suspension; performing directional freezing on the suspension, and then vacuum drying and sintering to obtain the bionic thermal insulation, noise reduction and fireproofing integrated nanofiber aerogel. The present invention utilizes the property that hydrophilic colloids can gel with the change of temperature, and can quickly solidify to form a high-strength gel during the directional freezing process to solidify the fiber matrix and the infrared sunscreen reinforcing phase, and then removes ice crystals and hydrophilic colloids through freeze drying and high-temperature sintering, thereby solving the sedimentation problem of high-density reactants during the freezing process.