83results about How to "High temperature resistant" patented technology

The invention discloses a local rolling forming method for a high-temperature alloy gradient structure dual-performance disc and the disc. The two sides of the disc piece are provided with annular groove structures stretching across the disc center to the disc edge partial area. The forming method comprises the steps that a high-temperature alloy disc blank is installed to a mandrel of a clamping part to rotate at the constant speed; the high-temperature alloy disc blank is heated, a disc center area of the high-temperature alloy disc blank is cooled, the temperature of the high-temperature alloy disc blank is formed, and a high-temperature alloy rolling forming temperature gradient interval is kept; according to the thickness of the high-temperature alloy disc blank, the first deformation ratio and the second deformation ratio, the first axial pressing amount of each pass of rolling in the disc center area and the second axial pressing amount of each pass of rolling in the disc edge area are set, the two sides of the high-temperature alloy disc blank are rolled outwards in the radial direction of the disc center area from the specific position of the disc center area in sequence, and a disc piece is formed; and carrying out water cooling treatment on the heat-treated disc to room temperature. According to the invention, the purpose of accurately controlling the crystal double-organization structure in the integral forming of the high-temperature alloy with lower production cost and manufacturing period can be achieved.

The invention discloses a metal oxide-doped negative electrode material and a preparation method and application thereof. The preparation method comprises the following steps: mixing a porous carbon raw material and a solution containing metal salt, filtering, and carrying out heat treatment to obtain the porous carbon composite material containing the metal oxide. According to the invention, the oxide does not conflict with the positive electrode material of the battery, and the metal oxide is successfully doped in the porous carbon, so that the overall conductivity of the porous carbon material can be improved, and the transmission efficiency of electrons can be enhanced; in addition, the high-temperature resistance of the electrode material can be enhanced, so that the electrode material can better bear the volume change of silicon particles and is more suitable for application scenes in an extreme environment, and the cycle life of the battery is prolonged. The invention provides a preparation method and application of porous carbon doped with transition metal oxide, and aims to overcome the defects of the existing porous carbon matrix and realize preparation and application of a silicon-carbon negative electrode material which is more stable in structure, resistant to high temperature and more excellent in electrochemical performance.

The invention discloses an aluminum oxide and aluminum nitride composite electrostatic chuck which comprises a metal base, an aluminum oxide ceramic structural part, an aluminum nitride ceramic dielectric layer, a heating layer and an adsorption electrode layer. The aluminum oxide ceramic structural member is coated outside the metal base, and the aluminum nitride ceramic dielectric layer comprises a first dielectric layer, a second dielectric layer and a third dielectric layer. The aluminum oxide ceramic structural member is coated outside the metal base, and the aluminum oxide ceramic structural member has the characteristics of high temperature resistance, corrosion resistance and wear resistance, so that the corrosion of plasmas to the metal base can be effectively shielded, and meanwhile, particulate pollutants are not generated to pollute a wafer; according to the composite electrostatic chuck, the aluminum nitride ceramic dielectric layer is arranged, and the aluminum nitride ceramic dielectric layer has excellent heat-conducting property and temperature uniformity, so that the composite electrostatic chuck can effectively control the temperature in the semiconductor processing process, the temperature uniformity of the surface of a wafer is ensured, the processing consistency is good, and the processing precision and the product quality are improved.

The invention discloses a graphite negative electrode material with excellent high-temperature cycle performance and a preparation method thereof, and belongs to the field of lithium battery negative electrodes, and the preparation method comprises the following steps: carrying out mechanical crushing and intermittent shaping on raw material coke to obtain coke powder with a particle size D50 of 6-20 [mu] m and a tap density of 0.6-1.2 g / cm < 3 >, and carrying out first heat treatment on the coke powder to obtain a pre-carbonized material; and placing the pre-carbonized material in a crucible furnace or a box-type furnace, carrying out second heat treatment to obtain a graphitized material, naturally cooling the graphitized material to room temperature, and screening and demagnetizing the graphitized material by using a 300-mesh vibrating screen classifier to obtain the high-temperature-resistant long-circulation graphite negative electrode material. The cost and the performance can be adjusted as required by using diversified raw material sources, and the trend of green chemistry and sustainable development is met. The graphite negative electrode material disclosed by the invention has high-temperature stability, long cycle life, excellent electrochemical performance and structural stability.

The invention discloses an interfacial film, a preparation method thereof and an application of the interfacial film in assembly of a lithium ion battery, the interfacial film comprises the following components: lithium salt, polyvinylidene fluoride and 1-butyl-2, 3-dimethyl imidazole onium chloride, the mass ratio of the lithium salt to the polyvinylidene fluoride to the 1-butyl-2, 3-dimethyl imidazole onium chloride is about 1: 0.9-1.1: 0.9-1.1, preferably about 1: 0.95-1.05: 0.95-1.05, and the mass ratio of the lithium salt to the polyvinylidene fluoride to the 1-butyl-2, 3-dimethyl imidazole onium chloride is 1: (0.9-1.1): (0.9-1.1), preferably about 1: (0.95-1.05). The weight-average molecular mass of the polyvinylidene fluoride is about 90-110 thousand g / mol, the lithium salt is lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) and / or lithium bis (fluorosulfonyl) imide (LiFSI), the purity of the lithium salt is greater than 99.9%, the polyvinylidene fluoride (PVDF) is selected as a polymer matrix, and is compounded with the ionic liquid 1-butyl-2, 3-dimethyl imidazolium chloride (BMMImCl) and the lithium salt, so that the performance of the lithium ion battery is improved. According to the present invention, the novel interfacial film is prepared, and the interfacial film has characteristics of high temperature resistance, chemical stability, excellent ion transmission characteristic, excellent lithium ion adsorption capacity, excellent performance, and wide application prospect in the lithium battery field.

This invention discloses an insulating encapsulation structure and connection method for a probe temperature sensor, relating to the field of temperature sensor technology. The insulating connection bracket has an outer insulating and thermally conductive protective layer, and contains insulating adhesive and a temperature-sensing component. The specific implementation is as follows: an insulating layer assembly, a built-in snap-fit ​​structure within the insulating connection bracket, and an eccentric cavity for housing the temperature-sensing component. A thermistor glass body is used as the insulator. In the insulation process, direct contact between the glass body and the inner wall of the bracket reduces one useless insulating layer. The cavity formed by the end of the insulating connection bracket and the insulating layer assembly houses the temperature-sensing component. The cavity contains a clearance structure for the thermistor pins and multiple layers of insulation between the pins and the conductive copper wires. A fluid insulating adhesive is used, and then the insulating connection is cured. Finally, the encapsulation is placed inside a metal shell containing insulating adhesive and cured, thus forming multiple layers of effective insulation and sufficient safe insulation thickness between the thermistor conductive pins and the metal shell.

This invention belongs to the field of fiber optic sensing and relates to a method based on WS 2 A temperature sensor based on all-fiber fluorescence intensity comprises a single-mode fiber, a three-hole grapefruit fiber, and a multimode fiber connected in sequence; the three-hole grapefruit fiber has three air holes, in which WS is deposited. 2 The multimode fiber output end is equipped with a mounting base, on which a filter is mounted. This invention utilizes WS... 2 Assembled within a three-hole optical fiber, with single-mode and multi-mode fibers fused together at both ends, this sealed structure effectively isolates the sensor from external air, preventing contact between the outside air and the two-dimensional material on the inner wall of the fiber during heating. This slows down the decomposition of transition metal sulfides, significantly improving the fluorescent sensor's ability to detect high temperatures and extending its lifespan. The sensor itself and its detection system are coupled and output via optical fiber, eliminating the need for external spatial light or optical modulation.

The invention relates to the technical field of adhesives, in particular to a high-temperature reaction type adhesive film as well as a preparation method and a use method thereof. The adhesive comprises 40-60 parts of phenolic resin, 40-60 parts of nitrile rubber, 10-20 parts of tackifying resin, 10-20 parts of reactive resin, 3-9 parts of a curing agent, 0.5-2 parts of a vulcanizing agent, 0.5-2 parts of an accelerant, 5-15 parts of filler, 0.5-1 part of an antioxidant and 1-3 parts of carbon black. According to the invention, the reaction type resin is used, so that the reaction can be rapidly carried out at a certain temperature, the reaction activity of an adhesive system is improved, the adhesion to a bonding substrate is increased, the curing time and the curing pressure can be effectively reduced, and good bonding strength can be achieved under the conditions that the curing time is 2-3 minutes and the minimum curing pressure is 0.4 MPa. And the tackifying resin can provide a small amount of initial viscosity for the adhesive film, and is beneficial to bonding and positioning of the adhesive film. The problems of low curing speed and poor bonding positioning of the phenolic aldehyde-butyronitrile adhesive film are solved, and the industrial application of the adhesive film is favorably expanded. The adhesive film is simple and convenient to operate, quick, efficient, green, environment-friendly, good in comprehensive performance and suitable for the requirements of industrial production.

This invention discloses a method for preparing a composite vibration damper consisting of a high-pressure-bearing sintered metal fiber body and a metal plate, belonging to the technical field of composite vibration dampers. By controlling factors such as the diameter, porosity, and thickness of stainless steel fibers, and through high-temperature sintering and pressure forming, this invention obtains a stable, high-compressive-strength stainless steel felt sintered body (SFB). The metal plate is then combined with the SFB to fully utilize the vibration damping energy of the SFB, resulting in a high-pressure-bearing metal fiber vibration damper. This vibration damper exhibits high compressive strength and excellent vibration damping performance, and also possesses characteristics such as corrosion resistance, high-temperature resistance, machinability, and strong environmental adaptability.

This invention relates to the field of battery separator materials technology, specifically to MXene-functionalized aramid paper-based battery separators, their preparation methods, and applications. Meta-aramid paper is prepared by wet papermaking using short-cut meta-aramid fibers and precipitated fibers. MXene nanosheets are prepared by hydrofluoric acid etching. Using the meta-aramid paper as a substrate, a functional coating is constructed on the surface of the aramid paper by loading a mixture of para-aramid nanofibers and MXene through a vacuum-assisted filtration-layer-by-layer self-assembly method. The resulting functionalized separator is obtained through protonation reduction. The separator, with its three-dimensional porous protective layer constructed from para-aramid nanofibers and MXene, combines physical barrier and chemical bonding, effectively inhibiting polysulfide shuttle. Furthermore, the highly active sites of MXene can activate inert sulfur-containing substances, improving sulfur utilization. When used in assembling lithium-sulfur batteries, the separator achieves an initial discharge capacity of 1244 mAh·g at a constant current density. ‑1 The capacity retention rate is 82% after 200 cycles.

The invention relates to the technical field of metal surface treatment, in particular to a coating precursor composition, a metal coating and a preparation method and application of the coating precursor composition and the metal coating. The nano additive comprises a combination of nano silicon dioxide, nano aluminum oxide, nano magnesium oxide and nano titanium dioxide. The coating precursor composition provided by the invention comprises the silane coupling agent and the nano additive, and the metal coating prepared from the coating precursor composition has the excellent properties of high temperature resistance, difficulty in stripping, high hardness, no color, transparency and the like, can effectively resist erosion and wear of an external environment, and effectively prolongs the service life of metal.

The utility model relates to the field of lighting, and discloses an LED light source device and lighting equipment. The white ink layer is positioned on the upper surface of the substrate; mounting holes are distributed in the white ink layer; the LED chip is positioned on the upper surface of the substrate and is electrically connected with the substrate through the mounting hole; the white glue reflecting layer is positioned on the surface of the white ink layer and is positioned around the LED chip; and the fluorescent colloid is positioned on the surface of the white glue reflecting layer and covers the LED chip. The white glue reflecting layer is located on the upper surface of the white ink layer, and the white glue reflecting layer has the characteristic of high temperature resistance, is not prone to discoloration at the high temperature and ensures long-term lighting effect stability, so that a good reflecting effect can be achieved on light emitted by the LED chip, the lighting effect of the LED light source device is improved, and the service life of the LED light source device is prolonged. And the problems of color temperature dispersion and poor color consistency can be solved, and the chromaticity stability is improved.

The invention relates to the technical field of defoaming agents, and discloses an emulsion type defoaming agent with excellent stability and a preparation method thereof.The preparation method comprises the steps that white carbon black and graphene are modified and react to obtain modified filler, the modified filler and hydrogen-containing silicone oil are subjected to an addition reaction to obtain modified organic silicon, and the modified organic silicon is subjected to a reaction to obtain the emulsion type defoaming agent. The modified organic silicon, the thickening agent, the emulsifying agent and the deionized water are stirred and mixed to obtain the emulsion type defoaming agent with excellent stability, the white carbon black and the graphene of the defoaming agent have a synergistic effect and are matched with each other, after modification, the defoaming agent can be uniformly dispersed in a matrix to form a more stable defoaming system, the stability of the product is enhanced, the preparation process is simple, and the preparation method is suitable for industrial production. The foaming agent has the advantages of easily available raw materials, low cost, capability of rapidly eliminating and preventing foam generation, effective improvement of the production efficiency, good stability, difficult layering phenomenon, and good dispersibility and storage stability.

The application relates to the technical field of mechanical parts, in particular to a manufacturing process of a high-temperature-resistant spring and the high-temperature-resistant spring, which comprises a glue dipping pool, a heating box arranged at the front end of the glue dipping pool, a high-temperature box arranged at the front of the heating box in intervals, a material conveying group arranged outside the port at the front end of the heating box and a forming device arranged in the high-temperature box. The carbon fiber bundle soaked with thermosetting resin is conveyed by the material conveying group, enters the heating box, is low-temperature heated and shaped, enters the forming device, is rotated and bent by the material pushing sleeve of the spring making group on the end face of the material pressing ring and the outer wall of the forming cylinder, forms a spiral spring structure, is heated and solidified by the high-temperature box, and finally is cut in length by the ultrasonic cutter, so that the manufactured carbon fiber spring has the high-temperature-resistant characteristic and is suitable for a high-temperature environment of thousands of degrees.

The application provides a method for improving the LPS stress resistance of broilers, which is realized by feeding a mannose oligosaccharide compound preparation prepared from enzymolysis coffee grounds. The preparation method of the mannose oligosaccharide compound preparation comprises the following steps: crushing coffee grounds, and adding a compound reagent for pretreatment; adding a compound enzyme preparation I to the mixed system after reaction, and carrying out enzymolysis for 6-8 hours under the condition of 50-60 DEG C; then adding a compound enzyme preparation II, and carrying out sufficient enzymolysis under the condition of 55-65 DEG C; after the enzymolysis is completed, a fermentation compound microbial agent is used for continuing fermentation for 6-12 hours under the condition of 30-35 DEG C, and drying is carried out; the compound enzyme preparation I comprises papain, alpha-amylase and saccharifying enzyme; the compound enzyme preparation II comprises cellulase, mannanase and glucanase; and the fermentation compound microbial agent comprises maxwell kluyver yeast and lactobacillus plantarum. The method can not only avoid drug residues caused by feeding drugs, but also realize the reuse of coffee grounds.

This utility model relates to the field of kitchenware testing technology, and in particular to a fixing device for a wireless temperature and pressure recorder for testing the energy efficiency of an electric pressure cooker. The device includes a fixing frame, which comprises an adjustable-length support leg, a position indicator circle, a vertical limiting rod, a horizontal drag ring, and an adjusting buckle. The adjustable-length support leg is disposed on the position indicator circle and is used to fix and support the fixing frame while maintaining contact with the bottom surface of the inner pot. The vertical limiting rod is detachably connected to the adjustable-length support leg. One end of the adjusting buckle is fixedly connected to the horizontal drag ring, and the other end is slidably sleeved on the vertical limiting rod, used to adjust and lock the position of the horizontal drag ring in the vertical direction. This utility model solves the problems existing in the prior art, such as the inability to fix the position of the wireless temperature and pressure recorder in the inner pot, large test result errors caused by using other wired thermocouples, low test efficiency, easy breakage of thermocouple wires, and easy impact on the sealing performance of the electric pressure cooker.

The valve comprises a valve body, a valve element and a driving assembly, a sealing cavity is formed in the valve body, an opening is formed in one end of the sealing cavity, an inner sealing face is arranged in the sealing cavity, the valve element is connected into the sealing cavity in a rotating mode, an outer sealing face is arranged on the valve element, a liquid inlet and a first liquid outlet are formed in the valve body, and a liquid passing channel is formed in the valve element. The liquid passing channel can be communicated with the liquid inlet, the liquid passing channel is provided with a containing groove, an annular sealing piece is arranged in the containing groove, a switching hole is formed in the annular sealing piece, and a contact sealing face is arranged on the annular sealing piece; the containing groove is formed in the other end of the liquid passing channel of the valve element, the annular sealing piece made of the material with the low friction coefficient is arranged in the containing groove, and the contact sealing face of the annular sealing piece and the inner sealing face of the valve element are in sealing and sliding fit, so that friction between the valve element and the valve body can be reduced, and durability is improved; the containing groove can maintain the overall shape of the annular sealing piece, and the annular sealing piece is prevented from deforming and losing efficacy due to pressure.

The application discloses a strain of Agaricus bisporus with outstanding flavor quality and high yield Agaricus bisporus ), and belongs to the technical field of edible fungi. The strain is preserved in the China General Microbiological Culture Collection Center on June 1, 2026, and the preservation number is CGMCC NO.42856. The application takes wild germplasm of Agaricus bisporus as a parent source, selects target hybridization materials through molecular markers, and then obtains Agaricus bisporus 284x290-5 with the characteristics of outstanding flavor, yield improvement and high-temperature resistance through hybridization cultivation.

The invention relates to the technical field of reactor thermal hydraulic power and safety, in particular to a heated plate and a heat transfer simulation experiment device with the same. The heated plate comprises a bubbling plate, a heating plate and an insulating layer, a groove is formed in the foaming plate through a casting process; the heating plates and the foaming plates are arranged in parallel at intervals; the insulating layer is located between the foaming plate and the heating plate, the insulating layer is connected with the heating plate, and the insulating layer and the foaming plate are connected through vacuum diffusion welding so that a vacuum bubble-shaped part can be defined by the insulating layer and the groove in the foaming plate. According to the invention, the thermal boundary of the dispersion type fuel element during bubbling can be accurately simulated, the flow heat transfer characteristic near the vacuum bubble part can be simulated and measured, the reduction degree of the measurement result is high, and the reliability is good.

The utility model relates to a boiler SNCR spray gun convenient to replace, including gun body, the front end of gun body is connected with the gun head, still include connecting piece and fixed clamp, connecting piece includes sleeve pipe, and the flange plate and circular plate connected in the both ends of sleeve pipe, the flange plate is connected with boiler wall flange, the gun body is equipped with the fixed plate matched with circular plate, the shape of fixed clamp is matched with circular plate and fixed plate, fixed clamp includes a pair of semicircle clamp of hinge connection, and is used for the lock catch device of fixed clamp opening and closing, semicircle clamp includes the face hoop board of circular arc, the side hoop board with locking hook connected in the both sides of face hoop board, locking hook is equipped with the first guide surface of arc towards the inside of side hoop board, have realized only need fixed clamp to tighten and connect circular plate and fixed plate, simultaneously, the first guide surface of locking hook extrudes circular plate, cooperates with the side hoop board of other side, extrudes fixed plate and sticks together to circular plate, need not additional force and press tightly two, satisfy the convenience demand of quick dismounting spray gun.

This utility model discloses an inner flame vortex burner. It includes a burner and large flame ejector tubes. The burner is an irregularly shaped shell with a centrally protruding annular cone shape. Large flame ejector tubes are provided on both sides and connected to it, forming a double-ejector structure. The central annular cone surface has a protruding short flame groove and a concave long flame groove. The inner ring of the central annular cone has a protruding upper flame stabilizing groove and a concave lower flame stabilizing groove. The bottom of the central annular cone has two segmented grooves and two segmented ribs. A connecting hole is provided on the outer edge, and two positioning grooves are provided at the outlet of the large flame ejector tubes. This utility model features a simple structure, strong ejection force, high heat load, high combustion thermal efficiency, material saving, quick processing, and aesthetically pleasing combustion flame.

The invention belongs to the technical field of mineral materials, and particularly relates to graphite lubricating liquid for a sliding plate brick and a preparation method of the graphite lubricating liquid. The preparation method comprises the steps that high-purity graphite is collected and subjected to superfine grinding to serve as a raw material for preparing the graphite lubricating liquid; putting the collected raw materials into a high-speed stirrer, adding water, and stirring to obtain slurry; adding an adjusting agent into the obtained slurry, and stirring to adjust the pH value; and respectively adding a film-forming agent, a defoaming agent and an anti-settling agent into the slurry with the adjusted pH value, grinding by using a sand mill, and standing for more than 24 hours to obtain the graphite lubricating liquid. The graphite lubricating liquid for the sliding plate brick prepared by the method has the characteristics of high temperature resistance, corrosion resistance, good dispersity and good lubricity, the film-forming agent and the anti-settling agent are added in the preparation process, the wettability of the graphite lubricating liquid and a sliding plate can be enhanced, meanwhile, the storage time can be prolonged, a sand mill is adopted for grinding in the preparation process, and the service life of the sliding plate brick is prolonged. The dispersity and the stability of the lubricating liquid can be improved.

The invention aims to disclose a punch-formed ultrathin metal filtering material, a process, a filter and application, and relates to the technical field of punch forming, two surfaces of a metal base material with the thickness of 0.005 mm-0. 03mm are provided with a first reference horizontal plane and a second reference horizontal plane; the first reference horizontal plane is provided with a plurality of first convex hulls which protrude out of the first reference horizontal plane and are arranged in a first array, and the top of each first convex hull is provided with a first special-shaped micropore with the aperture of 20-60 microns; the second reference horizontal plane is provided with a plurality of second convex hulls which protrude out of the second reference horizontal plane and are arranged in a second array, and the tops of the second convex hulls are provided with second special-shaped micro holes with the hole diameter ranging from 20 micrometers to 60 micrometers; the ultra-thin metal filtering material has the beneficial effects that the two surfaces of the metal base material are synchronously stamped to form the ultra-thin metal filtering material, the ultra-thin metal filtering material has a good basis of high temperature resistance and corrosion resistance, and the first convex hulls and the second convex hulls form an uneven surface structure, so that the pollutant holding capacity of the filtering material can be improved.

The utility model discloses a quartz tube sleeve for assembling a bonding wire annealing tube gas sensor, which comprises a tube body, the fixing pipe is used for being inserted into an annealing pipe opening to achieve sleeving connection of the pipe body and the annealing pipe, the limiting protrusion is used for abutting against the end face of the annealing pipe opening, the mounting base is used for mounting a gas sensor, and the limiting protrusion is arranged on the inner circumferential wall of the pipe body. One end of the limiting protrusion is connected between the fixing pipe and the installation base, the other end of the limiting protrusion is arranged in an inclined mode in the direction where the fixing pipe is located, a connecting table is arranged on the side wall of the installation base, and a containing cavity used for containing the sensor body is formed in the connecting table. The gas concentration monitoring device is simple in structure and convenient and reliable to assemble, facilitates monitoring of gas concentration and has a good use effect.

This invention discloses a method for separating fluorosilicic acid and hydrofluoric acid using an anion exchange membrane, comprising the following steps: adding a flocculant to a fluorosilicic acid-hydrofluoric acid mixture, aging it, then adding a desulfurizing agent to carry out a desulfurization reaction to obtain a mixed solution, adding the mixed solution to the feed side of an anion exchange membrane for membrane separation, and obtaining a hydrofluoric acid solution with a mass concentration of 2-30% on the clear water side after separation. This invention uses a flocculant to rapidly settle solids such as sodium fluorosilicate and potassium fluorosilicate in the fluorosilicic acid-hydrofluoric acid mixture, uses a desulfurizing agent to remove sulfuric acid, and then uses an anion exchange membrane to effectively separate fluorosilicic acid and hydrofluoric acid in the fluorosilicic acid-hydrofluoric acid mixed solution. The hydrofluoric acid separated by membrane separation has high purity and high output value, increases the utilization rate of by-product hydrofluoric acid, and reduces costs.

The application belongs to the field of aero-engine gas path sealing, and discloses a gradient-structure double-ytterbium silicate high-temperature seal coating and application. The seal coating comprises a barrier layer, a transition layer and an abradable surface layer which are sequentially sprayed on a to-be-sprayed base body along the thickness direction of the seal coating; the porosity of the barrier layer is 1-9%; the porosity of the transition layer is 9-18%; the porosity of the abradable surface layer is 18-30%; and the spraying feed powder of the barrier layer, the transition layer and the abradable surface layer is Yb2Si2O7-based powder. The coating has the characteristics of gradient distribution of porosity, high-temperature resistance, CMAS corrosion resistance, moderate hardness and high bonding strength.

The utility model relates to an anti-falling silica gel safety belt for an endoscope diagnosis and treatment bed, which is characterized by comprising the endoscope diagnosis and treatment bed and a silica gel safety belt which is arranged on the endoscope diagnosis and treatment bed and used for tightening a patient lying on the endoscope diagnosis and treatment bed, and the width of the silica gel safety belt is smaller than that of the endoscope diagnosis and treatment bed. Connecting buckles used for being fixedly connected with the two side edges of the endoscope diagnosis and treatment bed are arranged on the two opposite side edges of the silica gel safety belt, an opening right facing the abdomen of a patient lying on the endoscope diagnosis and treatment bed is formed in the center of the silica gel safety belt, and a shielding silica gel sheet capable of covering the opening is connected to the edge of the opening. The rubber safety belt has the advantages of being good in flexibility, not prone to deformation, resistant to high temperature, easy to clean, long in service life, good in elasticity and the like, and therefore stability and safety of a patient on the endoscope diagnosis and treatment bed can be improved, and the condition that the patient slides and falls off the bed is avoided. In addition, the opening is formed in the middle of the silica gel safety belt, a nurse can stretch out the hand to penetrate through the opening to press the belly of a patient in the enteroscopy process, and therefore a doctor is helped to better promote enteroscopy.

The invention belongs to the technical field of oil exploitation, and particularly relates to a dry powder thickening agent for fracturing as well as a preparation method and application thereof. The thickening agent comprises the following components: (a) 1-vinyl-2-pyrrolidone; (b) a di [2-(methacryloyloxy) ethyl] phosphate ester; (c) 2-(perfluorohexyl) ethyl methacrylate; (d) 4, 4 '-diaminostilbene-2, 2'-disulfonic acid; (e) an initiator; based on 1 mole part of 1-vinyl-2-pyrrolidone, the dosages of the di [2-(methacryloyloxy) ethyl] phosphate ester, the 2-(perfluorohexyl) ethyl methacrylate and the 4, 4 '-diaminostilbene-2, 2'-disulfonic acid are 0.05 to 0.1 mole part, 0.1 to 1 mole part and 0.2 to 0.5 mole part respectively, and the dosages of the di [2-(methacryloyloxy) ethyl] phosphate ester, the 2-(perfluorohexyl) ethyl methacrylate and the 4, 4 '-diaminostilbene-2, 2'-disulfonic acid are respectively 0.05 to 0.1 mole part, 0.1 to 1 mole part and 0.2 to 0.5 mole part. The thickening agent has the advantages of high apparent viscosity, high shear resistance, temperature resistance and high resistance reduction rate, and the resistance reduction rate reaches 70% or above.

The present invention provides a polymer composite floating plate track bed vibration isolator capable of achieving multi-directional vibration isolation effect, comprising a connecting device, a pressure bearing device and a vibration isolation device, wherein the connecting device comprises a foundation sleeve, a ball stud, a hanging bolt and a bottom plate connecting bolt, wherein the foundation sleeve is pre-buried in the floating plate and connected to the ball stud by threaded cooperation, the end of the ball stud is hemispherical, the pressure bearing device comprises an upper cover plate, a pressure bearing plate and a bottom plate, wherein the pressure bearing plate and the bottom plate are connected to the vibration isolation device, a rubber coating is arranged inside the upper cover plate, the upper surface is connected to the floating plate, and power is transmitted to the pressure bearing plate through the ball stud, a spherical groove is provided in the middle of the pressure bearing plate, which cooperates with the spherical surface of the ball stud, the vibration isolation device comprises a retaining frame and an elastic matrix, the middle part of the retaining frame is opened, and the elastic matrix penetrates into the hole of the retaining frame. The present invention develops a polymer composite floating slab roadbed vibration isolator which can achieve multi-directional vibration isolation effect, which not only has obvious vibration isolation effect on the vertical load generated during train operation, but also has good vibration isolation effect on the lateral and longitudinal loads generated during train operation.

The utility model relates to a cable, in particular to a high-power low-loss radio frequency cable for a chariot radar. The utility model aims to provide the high-power low-loss radio frequency cable for the chariot radar, and the cable has the functions of low attenuation, high power and external electromagnetic interference resistance, and has the characteristics of light weight and high flexibility. According to the technical scheme, the high-power low-loss radio frequency cable for the chariot radar is characterized by comprising a cable core, an inner shielding layer, a middle layer, an outer shielding layer and an outer protection layer, the cable core comprises a conductor, and a first insulating layer, a second insulating layer and a third insulating layer which sequentially wrap the conductor from inside to outside.