8results about How to "Improve flexural performance" patented technology

The utility model discloses hollow porous tunnel kiln burner brick relates to tunnel kiln technical field. The utility model discloses a brick body, the inside of brick body is provided with the combustion port, the inside of brick body is provided with the air vent, the inside of brick body is provided with the pre -tightening subassembly, the pre -tightening subassembly includes the pre -buried rod of installation in the inside of brick body, installs the tension rod on the surface of pre -buried rod, installs the reinforcing rib on the surface of pre -buried rod and installs the screw rod on the one end of pre -buried rod, the inside installation of combustion port has the protection layer. Hollow porous tunnel kiln burner brick of the utility model through the unique structure design, has improved its overall performance and service life significantly, and the introduction of pre -tightening subassembly has effectively enhanced the structural strength of brick body, and the synergies of pre -buried rod, tension rod and reinforcing rib, not only have improved the compression and the bending -resistant ability of brick body, still effectively restrained the expansion and the shrinkage of brick body, prevented the generation of crack.

The invention provides a tube component and a vascular intervention catheter with the same, a notch is formed in the tube component, the notch is provided with a first edge and a second edge, and the first edge and the second edge are oppositely arranged in the axial direction of the tube component; the first edge and the second edge are arc-shaped on the unfolding plane of the pipe component; any point is used as an original point, a straight line passing through the original point and perpendicular to the axial direction of the pipe component is used as an X axis, a straight line passing through the original point and parallel to the axial direction of the pipe component is used as a Y axis, a coordinate system is established, the track of the first side meets a function, the track of the second side meets a function, y1 is larger than or equal to y2, a is the maximum width value of the notch in the axial direction of the pipe component, and b is the outer circumference of the pipe component. The tracks of the first side and the second side meet the cosine functions (1) and (2) respectively, the distribution area of large stress on the pipe component can be increased, stress concentration on the pipe component is reduced, and the fracture resistance and durability of the pipe component are improved.

This invention provides a quick-connect balloon dilation catheter and a method for preparing the balloon dilation catheter. The quick-connect balloon dilation catheter includes a catheter seat, an outer tube connected to the catheter seat, and a balloon connected to the distal end of the outer tube. The outer tube has a metal tube body extending from the proximal end to the distal end, the metal tube body having a non-cutting segment at the proximal end and a cutting segment connected to the distal end of the non-cutting segment. The outer tube also has a polymer inner liner covering the inside of the cutting segment and a polymer sheath covering the outside of the cutting segment, such that the outer tube is integrally formed as a composite tube segment with a metal tube segment at the proximal end and a composite tube segment connected to the distal end of the metal tube segment, the composite tube segment having a quick-connect port penetrating both the inside and outside. This design improves the catheter's delivery and positioning accuracy.

The application discloses an impact-resistant and wear-resistant epoxy resin modified mortar and a preparation method thereof, and relates to the technical field of mortar.The application comprises the following raw materials in mass parts: deionized water 170-190 parts, modified boron nitride synergist 13.13-14.38 parts, water reducing agent 0.8-1.2 parts, tributyl phosphate 0.6-0.8 parts, composite modified porous polysiloxane microspheres 26.25-28.75 parts, water-based epoxy resin 21-23 parts, Portland cement 420-460 parts, sulphoaluminate cement 105-115 parts, concrete expansive agent 15.75-17.25 parts, river sand 1050-1150 parts, water-based epoxy curing agent 27.3-29.9 parts.The introduction of the modified boron nitride synergist and other raw materials in the application simultaneously improves the compressive strength, the bending strength, the impact strength, the wear resistance, the anti-cavitation ability, the aging resistance and the alkali corrosion resistance.

The invention provides an aluminum-based silicon carbide composite plate strip, and relates to the technical field of plate strips, a high-temperature transition layer is used for realizing gradient transition of high-temperature resistance and thermal stress, can effectively relieve high-temperature temperature difference stress between a zirconium modified pure aluminum anti-cracking main body layer and the high-temperature transition layer of a plate, and avoids deformation and cracking of the whole structure of the plate due to overlarge cold and hot gradient; the low-temperature buffer layer is matched with the boron fiber enrichment transition layer, so that the high-temperature-resistant strength of the transition area can be further improved, the boron fiber enrichment transition layer is prevented from structural instability at high temperature, the low-temperature buffer layer can realize gradient transition of low-temperature resistance and stress, and the low-temperature shrinkage stress of the lower layer of the plate can be effectively relieved; the temperature-resistant composite main body layer can bear the stress of all upper-layer structures and uniformly disperse the stress to the whole region, stable support is provided for all upper-layer functional structures, meanwhile, the temperature resistance of the temperature-resistant composite main body layer is complementary with the temperature-resistant and low-temperature-resistant structures of all the layers, and finally the comprehensive effects of heat resistance, cold resistance, cracking resistance and protection of the plate are achieved.

The application relates to the technical field of building plugging materials, and particularly provides a long-operable-time plugging material, which is prepared from the following raw materials in terms of total weight: 0.02-3% of a retarder, 0.005-2% of a calcium salt, 0.001-1% of a cellulose ether and cement supplementing to 100%. By optimizing the types of the retarder, the calcium salt and the cellulose ether and by stipulating the relative amounts of the retarder, the calcium salt and the cellulose ether, the quick-setting type plugging material has a relatively long retarding time, and the anti-bending performance, the anti-permeation performance, the bonding performance, the heat resistance and the freeze-thaw cycle resistance of the material after solidification are effectively improved.

The application relates to the technical field of structural members, and particularly discloses a high-strength gypsum batten with pressure resistance and folding resistance, which comprises a batten main body and a plurality of folding resistance assemblies equidistantly distributed along the width direction inside the batten main body, the folding resistance assemblies are arranged between adjacent holes, a single folding resistance assembly comprises first and second buffer plates which are parallel to each other, first and second V-shaped frames which are alternately and oppositely arranged between the first and second buffer plates, and a first buffer column which is connected to the inner sides of the first and second V-shaped frames through arc fixing claws, and the outer side of the second V-shaped frame is connected to a second buffer column through an arc fixing claw, and the outer side of the first V-shaped frame is connected to a third buffer column through an arc fixing claw; the batten main body is composed of gypsum, hemihydrate gypsum, asbestos cement, composite fibers, modified hardening fillers and the like, the folding resistance assembly effectively improves the folding resistance of the gypsum batten, and the batten main body raw material formula also improves the pressure resistance and folding resistance of the gypsum batten.

The invention provides an inorganic quartzite plate. The inorganic quartzite plate is prepared from the following raw materials in parts by weight: 48-52 parts of quartz sand, 30-40 parts of quartz powder, 6-9 parts of a reinforcing agent, 24-28 parts of cement, 4-6 parts of active powder, 7-10 parts of a water reducing agent, 3-5 parts of a toughening agent, 1-2 parts of an auxiliary agent and 15-18 parts of water. The invention also provides a preparation method of the inorganic quartzite plate. The inorganic quartzite plate provided by the invention has relatively high hardness and relatively good toughness, fracture resistance and water resistance.