195results about How to "Simple operation process" patented technology

The invention discloses a permanent magnet rotor surface-mounted magnetic steel mounting structure and method, and belongs to the technical field of motors, the permanent magnet rotor surface-mounted magnetic steel mounting structure comprises a rotor, a magnetic steel guide assembly is arranged above the rotor, the magnetic steel guide assembly comprises a plurality of pieces of simulation magnetic steel, the magnetic steel guide assembly is used for mounting magnetic steel to be mounted, and a mounting assembly is arranged at the bottom of the rotor. A plurality of locking assemblies are arranged on the mounting assembly, a plurality of magnetic steel mounting parts are arranged on the rotor, magnetic steel and a magnetic yoke before mounting are separated through a magnetic steel guide assembly tool, in the matching process of the magnetic steel and the magnetic yoke, the hand is evacuated to a safe position, safety risks are avoided, a magnetic steel pushing mode is not adopted, adsorption is prevented through a non-magnetic-conductive material, and the magnetic steel is prevented from being damaged. Glue pressing is used for replacing glue pushing, smooth installation of the surface-mounted magnetic steel is achieved, material loss is avoided, and the phenomenon that poor installation is prone to occurring in the mutual exclusion process of the magnetic steel, and the performance of a motor is affected is avoided.

The method comprises the following steps: (1) putting 1-vinyl imidazole into a flask containing N, N-dimethylformamide and D314 type resin, adding an initiator, carrying out a grafting reaction under the action of the initiator, and obtaining imidazolyl anion exchange resin after the reaction is finished; (2) pre-treating the imidazolyl anion exchange resin, and then adsorbing a rhenium-containing solution to be treated by adopting the pre-treated imidazolyl anion exchange resin; and (3) washing the imidazolyl anion exchange resin subjected to saturated adsorption in the step (2) by using ultrapure water, and then analyzing by using ammonia water to obtain a high-purity rhenium-containing solution. According to the method, the imidazolyl anion exchange resin is synthesized, the imidazolyl anion exchange resin has excellent selective adsorption capacity on rhenate ions, and efficient separation of rhenium and other impurities can be achieved when the imidazolyl anion exchange resin is applied to the rhenium-containing solution.

The invention discloses a three-dimensional protective bamboo composite sleeper and a manufacturing method thereof. The manufacturing method comprises the steps that S1, raw bamboos are processed into radial bamboo skin units; s2, the radial bamboo skin units which are not subjected to rolling or rolling treatment are subjected to glue applying treatment, and after glue draining, the radial bamboo skin units are dried to obtain glue; s3, the glued and dried radial bamboo skin units are assembled and pressed, and a pressed blank is obtained; s4, the pressed blank is cured, and a bamboo sleeper blank is obtained; s5, the bamboo sleeper blank is machined into the target size and shape, and a bamboo sleeper base body is obtained; and S6, the bamboo sleeper base body is directly subjected to protection treatment without nicking treatment, and the three-dimensional protection bamboo composite sleeper is obtained. The radial bamboo skin units which are not subjected to rolling or rolling treatment are used as raw materials, gaps are formed between the radial bamboo skin units during assembly and pressing, protective paint can permeate conveniently, the protection durability is improved, the cost is reduced, protection treatment is not needed after special nicking treatment, and the manufacturing process is simpler.

The invention discloses a curcumin-loaded brain-targeted drug delivery system as well as a preparation method and application thereof. The delivery system comprises a carrier macrophage and a curcumin drug, the curcumin nano-drug is prepared by encapsulating curcumin with a lipoic acid modified cyclodextrin conjugate, then macrophages and the curcumin nano-drug are mixed, and co-incubation is carried out, so that the curcumin nano-drug is constructed. The brain-targeted macrophage drug delivery system loaded with curcumin is a multifunctional composite drug with brain targeting property for treatment of cerebral arterial thrombosis. A brain-targeted macrophage drug delivery system loaded with the curcumin nano-drug gathers in cerebral apoplexy tissues, phenotypic transformation of inflammatory microglial cells is promoted, and a pro-inflammatory microenvironment is improved; the oxidative stress pressure of the stroke part is improved; the two effects promote each other, the stroke microenvironment is improved, the functions of neuronal cells are saved, the synergistic nerve protection effect can be achieved in the aspect of treating ischemic cerebral apoplexy, and potential safety hazards are reduced.

The invention provides a method for preparing a compact forsterite spinel composite material by using magnesia tailings. The method comprises the following steps: carrying out wet mixing and co-grinding on the magnesite flotation tailings and three-grade raw alumina to obtain a mixture; the mixture is subjected to filter pressing, drying, compression molding, secondary drying and high-temperature sintering, and the compact forsterite spinel composite material is obtained. According to the method for preparing the compact forsterite-spinel composite material by taking the magnesia tailings and the three-grade raw alumina as raw materials, a way is provided for exploring high-value utilization of the flotation tailings, and large-scale production can be realized; the method has important significance in improving the environment, realizing zero emission of magnesite resources and further reducing the production cost in the application field.

The invention discloses a composition for promoting wound healing of pets and a preparation method and application of the composition. A nutritional supplement comprises chlorogenic acid and glutamine. The nutritional supplement is wide in raw material source, healthy, rich in nutrition, good in palatability, low in price and easy to obtain; by using the specific formula, especially the chlorogenic acid and glutamine in a specific ratio, nutrient substances required by growth and development of pets can be supplemented, postoperative wound healing of the pets can be effectively promoted, postoperative pain, discomfort and inflammation of the pets can be reduced, immunity of the pets can be improved, no antibiotic component is added into the supplement, and the supplement is free of toxic and side effects. The liver and kidney burden of pets can be relieved, and the risk that bacteria generate drug resistance is avoided; the preparation method of the nutritional supplement only needs processing technologies such as crushing, sieving, homogenizing and emulsifying, the operation process is simple and easy to learn, and industrial large-scale production is facilitated.

The invention discloses a method for preparing hydrophilic carbon fiber, belonging to the technical field of carbon fiber materials. Glycidyl methacrylate and methyl methacrylate ethyl sulfobetaine are copolymerized by free radical polymerization to prepare a controllable amphiphilic copolymer; the amphiphilic copolymer is blended with dopamine, and a ternary system polymer is prepared by reacting an epoxy group with an amino group. Under alkaline solution conditions, the adhesion of dopamine after self-polymerization is utilized to introduce hydrophilic zwitterionic groups to the fiber surface to achieve sizing function, and to give the carbon fiber surface hydrophilic properties, so that it has better fiber opening in water, and achieves the effect of complete dispersion under aqueous conditions. The preparation method can ensure the strength of carbon paper while improving the dispersibility of carbon fiber, has important application prospects, and has a simple process and can meet the needs of large-scale industrialization.

The invention relates to the technical field of hemostatic materials, in particular to a kaolin hemostatic material with an anti-inflammatory function and a preparation method and application thereof. The invention relates to a kaolin hemostatic material with an anti-inflammatory function. The kaolin hemostatic material comprises kaolin loaded with CeO2 nanoparticles. The preparation method comprises the following steps: mixing kaolin with cerium chloride, sodium carbonate and sodium chloride according to a certain mass ratio, then carrying out ball milling to obtain a precursor, and roasting the precursor to obtain the kaolin hemostatic material with the anti-inflammatory function. According to the preparation method, kaolinite which is low in price and rich in reserves is adopted as a raw material, a conventional CeO2 raw material is selected, a CeO2-loaded kaolinite-based nano material is prepared through a mechanochemical synthesis method, and the CeO2 / K nano material with synergistic anti-inflammatory and hemostatic activity is prepared.

The invention relates to an improved UiO-66 synthesis process based on a nitrogen-containing ligand. A metal organic framework material with high specific surface area, thermal stability, chemical stability and mechanical stability is synthesized through a solvothermal method. The specific preparation process comprises the following steps: mixing 4-aminomethyl benzoic acid (4-(Aminomethyl) benzoic acid (AMBA) with terephthalic acid (1, 4-dicarboxybenzene, H2BDC) and zirconium tetrachloride (ZrCl4) according to a certain ratio, transferring the mixture into a crystallization kettle, and synthesizing, so as to obtain the nitrogen modified UiO-66 with different contents, which is recorded as UiO-66-AMBAX. According to the method, the catalysts of the nitrogen-modified UiO-66 with different contents are used for the CO2 cycloaddition reaction, the catalyst shows excellent conversion rate and selectivity, and the reaction conditions are mild.

The invention discloses a method for in-situ growth of a ZIF-7 film layer on the surface of a magnesium alloy micro-arc oxidation film layer, and the method specifically comprises the following steps: step 1, treating the surface of a magnesium alloy workpiece to be processed to make the surface smooth; 2, the workpiece treated in the step 1 serves as an anode to be placed in electrolyte, graphite serves as a cathode, a direct-current power source is adopted for conducting micro-arc oxidation treatment on the workpiece in a constant-current mode, a micro-arc oxidation film layer is formed on the surface of the workpiece, and then cleaning and blow-drying are conducted; step 3, putting the workpiece prepared in the step 2 into a ZIF-7 seed crystal solution, keeping the temperature at 110-130 DEG C for 180-300 minutes for in-situ growth, and taking out, cleaning and drying the workpiece after the growth is finished; wherein the ZIF-7 seed crystal liquid is prepared from zinc nitrate hexahydrate and benzimidazole, and the solvent is prepared from N, N-dimethylformamide and methanol; in the ZIF-7 seed crystal liquid, the concentration of zinc nitrate hexahydrate is 0.5 to 2.5 g / L, and the concentration of benzimidazole is 0.5 to 2.5 g / L.

The invention discloses multifunctional sample preparation equipment used in a hot chamber. The multifunctional sample preparation equipment comprises an X-axis linear module, a Y-axis linear module, a Z-axis linear module and a lifting drilling and milling table assembly which are arranged on a bed body, a clamp table is arranged on the X-axis linear module, a Z-axis rotating table is arranged on the Y-axis linear module, the Z-axis rotating table rotates around the Z-axis direction, the Z-axis linear module is arranged on the Z-axis rotating table, a cutting head rotating table is arranged on the Z-axis linear module, the cutting head rotating table rotates around the Y-axis direction, and a cutting head is arranged on the cutting head rotating table; the lifting drilling and milling table assembly is used for being matched with the cutting head for use after the Z-axis rotating table and the cutting head rotating table rotate. The problems that the sample preparation capacity in the hot chamber is insufficient, the cutting sample preparation function is single, the cutting precision is low and the sample preparation requirement cannot be met are solved, use and operation are convenient, the sample safety can be guaranteed, meanwhile, the operation process is simplified, the working efficiency is improved, the exposure dose of personnel is reduced, and the sample preparation objects and functions in the hot chamber are increased.

The invention provides a method and a device for recovering 3-hydroxypropionitrile in wastewater, and belongs to the technical field of wastewater recovery. The method for recovering 3-hydroxypropionitrile in wastewater comprises the following steps: 1) mixing wastewater, an alkaline solution and an electrolyte, and decomposing the obtained mixed material to obtain decomposed wastewater; 2) carrying out extraction or adsorption regeneration on the decomposed wastewater to obtain an extraction solution containing 3-hydroxypropionitrile or a regeneration solution containing 3-hydroxypropionitrile; and 3) carrying out molecular distillation on the extraction liquid containing 3-hydroxypropionitrile or the regeneration liquid containing 3-hydroxypropionitrile to obtain 3-hydroxypropionitrile. The method provided by the invention can effectively recover 3-hydroxypropionitrile in the wastewater and reduce the production cost.

The invention discloses a method for improving the elongation of a high-iron-content A356 alloy, which comprises the following steps of: firstly, obtaining or retrieving data of a thermodynamic database of an existing Al-Si-Mg-Fe system through an experiment; then, obtaining a thermodynamic equilibrium phase diagram by adopting a thermodynamic calculation method; and finally, determining a solidification path according to the thermodynamic equilibrium phase diagram, and determining the value range of the Fe element content. In the A356 alloy, the content of Fe is 0.5 wt.%, the content of Sr is 0.02 wt.%, and the cooling rate is 2 DEG C / s. The specific method comprises the following steps: 1, preparing an Al-7Si-0.3 Mg-0.5 Fe alloy melt; and 2, preparation of the Al-7Si-0.3 Mg-0.5 Fe-0.02 Sr alloy is carried out. The preparation method comprises the following In the obtained high-iron-content A356 alloy, the length of eutectic Si is 20.00 [mu] m, and the length of an Fe-rich phase is 55.70 [mu] m; and the ductility of the alloy is 6.02%.

The invention discloses an anisotropic enhanced electromagnetic shielding piece with structural orientation, ink of the anisotropic enhanced electromagnetic shielding piece and a 3D printing preparation method of the anisotropic enhanced electromagnetic shielding piece, and belongs to the technical field of electromagnetic shielding materials and 3D printing. And the laying direction of the filiform materials of each layer of plane unit is parallel to the same basic plane. By adjusting the plane units to be perpendicular to the incident direction of electromagnetic waves, the shielding effect in the incident direction is enhanced, meanwhile, basic shielding requirements in other directions are guaranteed, and anisotropic electromagnetic shielding is achieved. In addition, high-length-diameter rigid particles are added to assist the shearing effect of a 3D printing one-way extrusion flow field, ordered arrangement of multi-dimensional nanoparticles is induced, a microscopic oriented conductive network is constructed, and a conductive path is optimized, so that the shielding performance of the material is further enhanced. The anisotropic electromagnetic shielding performance is achieved, and meanwhile the electromagnetic shielding effect of the material is improved.

The invention provides an ultra-wideband electromagnetic shielding and bulletproof composite structure material and a preparation method thereof, and belongs to the field of preparation of electromagnetic wave-absorbing materials. The invention aims to solve the problems that the current electromagnetic shielding material is narrow in absorption wave band, the composite structure material is high in preparation cost and complex in process, and does not have protection performance. The ultra-wideband electromagnetic shielding and bulletproof composite structural material is mainly composed of four structural modules, namely (1) a wave-transparent skin; (2) preparing an aramid fiber honeycomb sandwich; (3) a reflecting plate; and (4) a bulletproof back plate. Wherein the wave-transparent skin is arranged on the outermost surface and receives incident electromagnetic waves, the aramid honeycomb sandwich, the reflecting plate and the bulletproof back plate are sequentially overlaid downwards, and all structural modules are bonded through modified resin adhesives. The ultra-wideband electromagnetic shielding and bulletproof composite structure material has a very excellent electromagnetic shielding effect, electromagnetic stealth of a target facility is achieved, meanwhile, certain protection performance is achieved, space occupation is reduced due to the multi-functionalization characteristic of the overall composite structure, and therefore the possibility that a target is detected is further reduced from the appearance; and the preparation raw materials of each structure module are rich, the cost is low, the operation process is simple, and industrial popularization and application of the ultra-wideband electromagnetic shielding and bulletproof composite structure material are facilitated.

The utility model discloses a new type of plugging device of mine anchor cable, including base, the middle part of base is equipped with steel strand channel, the upper end part grouting pipe in steel strand channel, the outer sleeve of grouting pipe is equipped with the plugging pipe, and is equipped with the clearance channel for the slurry through between the outer wall of grouting pipe and the inner wall of plugging pipe, and the upper end part of plugging pipe is provided with the sealing ring outward, the inner wall of sealing ring is equipped with a section of inner recess cavity, and the inner recess cavity and plugging pipe constitute the plugging chamber between, the lower end part of base is equipped with the grouting channel that communicates with steel strand channel, and the upper end part of grouting channel is equipped with one -way channel, and the lower end end portion in steel strand channel is installed with the plugging sealing ring. The utility model has the comprehensive technology of grouting and plugging function, installs with the grouting function together with anchor cable under the condition of not changing the structural property of anchor cable, can reduce cost and has higher economic value, the modelling is exquisite, and the operation process is simplified, and the labor intensity of operating personnel is reduced.

The invention discloses a soil non-symbiotic nitrogen fixation microorganism detection method based on a 15N2 tracer method, and belongs to the technical field of biological nitrogen fixation and microbial ecology. The method comprises the following steps: (1) carrying out a 15N2 isotope microcosm experiment; (2) determination of gas and soil 15N abundance in a microcosm experiment; (3) separating stable isotope labeled DNA and non-labeled DNA; and (4) identifying the enrichment degree of the 15N-DNA and analyzing the flora structure. On the basis of a 15N2 tracer method, a stable isotope nucleic acid probe technology and a 15N2 isotope direct labeling technology are integrated, the active nitrogen-fixing microorganisms and the ecological functions of the active nitrogen-fixing microorganisms can be researched at the same time, and technical support is provided for defining the types of the soil active nitrogen-fixing microorganisms in a natural ecological system and making contribution to nitrogen input. The method is simple and efficient in operation process, and has the advantages of high sensitivity and rapidness.

The method comprises the following steps: adding o-hydroxyphenyl enaminone as shown in a formula I, aryl sulfonyl chloride as shown in a formula II, a photocatalyst and an additive into a solvent, stirring and reacting under the irradiation of a light source, filtering, washing, and drying to obtain the 3-position sulfonyl substituted chromone derivative. And after the reaction is finished, carrying out post-treatment to obtain the 3-position sulfonyl substituted chromone derivative as shown in a formula III, wherein the reaction formula of the 3-position sulfonyl substituted chromone derivative is as follows: # imgabs0 #. The method has the advantages of simple operation process, cheap and easily available raw materials, mild reaction conditions, high reaction yield and the like, and compared with the traditional process, the method avoids the use of high-temperature conditions and oxidizing agents, and is environment-friendly.

This application discloses a tool setting method and tool setting fixture for a vertical slotting machine, belonging to the technical field of tool setting devices. To address the problems of low tool setting efficiency and poor accuracy in existing vertical slotting machines, the tool setting fixture includes a central support plate. A triangular jaw is installed at the bottom of the central support plate. The tool setting fixture is installed at the inner hole of the workpiece to be processed via the triangular jaw. A support base for fixing a measuring device is installed on the front side of the central support plate. A tool setting sample block is detachably connected to the support base. The operator determines the tool setting position by cooperating with the measuring device and the tool setting sample block. This application is mainly used as a tool setting device for CNC vertical slotting machines.

The invention discloses an anticorrosive coating based on phytic acid and cerium ion modified montmorillonite as a water-borne epoxy resin filler, and belongs to the technical field of water-borne epoxy resin anticorrosive coatings. Montmorillonite is selected as a carrier, trivalent cerium ions and phytic acid functional groups are loaded in the montmorillonite through a hydrothermal synthesis method to obtain modified montmorillonite filler (MMT-Ce-PA), and the modified montmorillonite filler (MMT-Ce-PA) is added into a waterborne epoxy coating to obtain the modified montmorillonite anticorrosive coating (WEP / MMT-Ce-PA). In a 3.5% wt. NaCl solution, compared with a blank control WEP coating, the WEP / MMT-Ce-PA coating has relatively high corrosion resistance. The steps are simple and convenient, the operation is simple, and the cerium ion and phytic acid functional group loaded montmorillonite improves the barrier corrosion resistance of the waterborne epoxy coating.

The invention provides a Cs3Bi2Br9 / BiOCl composite material as well as a preparation method and application thereof, and relates to the technical field of photocatalytic materials. The preparation method comprises the following steps: firstly, preparing BiOCl through a solvothermal method, then adding the BiOCl into a dimethyl sulfoxide solution of CsBr-BiBr3, stirring to disperse the BiOCl, and drying the BiOCl in a drying oven; and dropwise adding isopropyl alcohol (IPA) into the obtained solid, after the reaction is completed, centrifugally collecting a sample, cleaning the sample with ethanol, centrifugally collecting the cleaned sample, and drying in a drying oven to obtain the Cs3Bi2Br9 / BiOCl composite material. The preparation method of the Cs3Bi2Br9 / BiOCl composite material is simple in operation process, and the prepared material is high in yield and low in cost. The prepared Cs3Bi2Br9 / BiOCl composite material has the photocatalytic capability under a full spectrum, and has a wide application prospect.

The utility model discloses a transformer oil tank cover welding positioning device, which belongs to the technical field of transformer oil tanks, and is characterized by comprising an upper positioning plate, a lower positioning shaft, a main positioning shaft and a tank cover structure, an auxiliary positioning shaft is arranged on the inner wall of the upper positioning plate, and a middle positioning plate is arranged at the bottom of the upper positioning plate. The upper positioning plate sleeves the surface of the main positioning shaft, the middle positioning plate sleeves the surface of the main positioning shaft, and the lower positioning plate sleeves the surface of the main positioning shaft, so that the problems that the production efficiency is low, the production cost is high and the like due to the fact that a single-head wire is mostly manually welded when an existing welding positioning device for the transformer oil tank cover is used for welding are solved. And meanwhile, the requirements for perpendicularity and positioning precision after welding cannot be met, once offset and deflection occur, the high-tension porcelain insulator cannot be installed, or the porcelain insulator is broken and damaged, the quality of a finished transformer is seriously affected, and major potential safety hazards exist.

The invention relates to the technical field of organic synthesis, in particular to a bi-component high-strength and high-toughness polyaspartic acid ester polyurea coating and a preparation method thereof. According to the bi-component high-strength high-toughness polyaspartic acid ester polyurea coating disclosed by the invention, adipic acid polyester polyol and polyisocyanate synthesized prepolymer are used as a curing agent component, and polyaspartic acid ester resin and an organic solvent are used as a component B to prepare bi-component high-strength high-toughness resin; by changing the types and proportions of the polyisocyanate, the polyaspartic acid ester resin and the organic solvent and adjusting the pot life, the surface drying time, the hard drying time and other properties of the material, the material can be suitable for different use conditions, use parts and use places.

The application belongs to the cross field of nanomaterials and coordination chemistry, and specifically discloses a near-infrared responsive photothermal silver-palladium nanocluster material, a preparation method and application in near-infrared photothermal conversion. 362 H 270 Ag 20 Cl4F 12 P8Pd5Sb2, which is abbreviated as Ag 20 Pd5(4‑EBP) 18 (DPPP)4(SbF6)2·2CH2Cl2, belongs to a monoclinic system, and a space group is P21 / n, a =16.228(13)Å, b =40.670(3)Å, c =25.941(2)Å, α=90°, β =100.283(2)°, gamma =90°, V=16846(2)Å 3 , and a molecular weight is 8170.22 Da. The preparation method has short process flow, simple operation, and raw materials are easy to obtain. The photothermal silver-palladium nanocluster has a high photothermal efficiency of 73.25% under 915 nm (0.6 W / cm 2 ) laser excitation, and has good application prospect.

The invention discloses a catalyst for low-temperature direct catalytic decomposition denitration as well as a preparation method and application thereof, and belongs to the technical field of direct catalytic decomposition denitration. The preparation method comprises the following steps: by taking potassium ferricyanide, manganese nitrate and polyvinylpyrrolidone as raw materials, preparing a ferromanganese oxide carrier with a hollow structure by adopting a coprecipitation method and high-temperature annealing, and then loading noble metal rhodium on the ferromanganese oxide carrier by adopting an impregnation method, thereby obtaining the denitration catalyst for low-temperature direct catalytic decomposition. When the low-temperature direct catalytic decomposition denitration catalyst is prepared, the reduction-state nano hollow ferromanganese oxide carrier with the hollow structure is adopted, oxidation inactivation of rhodium can be effectively inhibited, and the low-temperature direct denitration activity of the catalyst is greatly improved. The operation process is simple, a reducing agent is not needed, and secondary pollution is avoided; meanwhile, the reaction temperature is low, the denitration efficiency is high, and the direct emission standard of nitric oxide can be met.

The invention discloses a preparation method of p-bromoanisole, and relates to the technical field of preparation of p-bromoanisole, and the preparation method comprises the following steps: S1, preparing anisole; s2, preparing a sodium bromide solution; s3, material preparation: extracting anisole in S1, and performing synthesis preparation on the sodium bromide solution, hydrochloric acid and hydrogen peroxide in S2; 4, material synthesis: anisole, the sodium bromide solution and hydrochloric acid in the step 3 are put into a reaction kettle, hydrogen peroxide is dropwise added after cooling, standing is performed after the reaction is finished, liquid separation is performed, and a lower-layer crude product is obtained after liquid separation; s5, distillation: putting the crude product in S4 into a reaction kettle for separation and distillation to obtain the product p-bromoanisole. According to the method, the anisole, the sodium bromide solution and the hydrochloric acid are put into the reaction kettle, the hydrogen peroxide is dropwise added after cooling, the high-content and high-yield p-bromoanisole product is obtained after preparation, the waste rate of raw materials consumed for preparation is low, the obtained p-bromoanisole is high in quality, the operation process is simple, and the environmental protection performance is high.

The invention provides a modular intubation bridge plug which comprises an intubation assembly, a bridge plug assembly and a functional module assembly, and the intubation assembly comprises an intubation and an intubation releasing injection device connected to the lower portion of the intubation; the bridge plug assembly is movably arranged on the periphery of the insertion pipe assembly in a sleeving mode, and the lower portion of the bridge plug assembly is detachably connected with the functional module assembly. The functional module assembly comprises any one of a squeezing device, a sealing layer screwed plug and a hanging lower connector, and when the bridge plug assembly is connected with the squeezing device, high-pressure plugging agent squeezing construction is achieved; when the bridge plug assembly is connected with the sealing layer screwed plug, bridge plug sealing layer construction is achieved; when the bridge plug assembly is connected with the suspension lower connector, suspension clamping and sealing construction is achieved. According to the intubation bridge plug provided by the invention, a plurality of different purposes such as reservoir plugging, tail pipe hanging, clamping and sealing can be realized at the same time.

The present invention relates to a high-performance resin matrix suitable for room temperature RTM process and a preparation method thereof, belonging to the technical field of epoxy resin preparation. The high-performance resin matrix comprises the following components in parts by weight: 80-120 parts of multifunctional epoxy resin, 1-15 parts of epoxy diluent, 80-220 parts of anhydride curing agent, and 1-3 parts of catalyst. The present invention selects a glycidyl ester epoxy resin with low viscosity as the resin matrix, and reduces the viscosity of the resin and increases its operating time by introducing a small amount of active epoxy diluent; adds anhydride curing agent to further reduce the viscosity of the resin formula and increase its operating time; adds a suitable catalyst to reduce the operating temperature of the resin to room temperature and reduce the curing temperature, so that the resin has the advantages of low viscosity, ultra-long room temperature operating time and low curing temperature; at the same time, it has excellent comprehensive mechanical properties and heat resistance, and is suitable for the RTM molding process of large composite material structural parts.

The utility model discloses an assembling device of an optical fiber preform. The assembling device comprises a controller, the core rod storage rack is used for placing a plurality of core rods, is provided with a core rod measuring module connected with the controller, and is used for measuring basic parameters of the core rods; the casing pipe roll-over stand is used for placing a casing pipe, is provided with a casing pipe measuring module connected with the controller and is used for measuring basic parameters of the casing pipe; the vacuum suction cup device comprises a vacuum suction cup and is used for sucking a target core rod, and the position of the vacuum suction cup is adjustable; the assembling table is provided with a power mechanism used for driving the vacuum suction cup to move; the air pressure adjusting system is used for adjusting the pressure in the sleeve, it is guaranteed that pollutants entering the sleeve are reduced to the maximum extent in the assembling process, and meanwhile the core rod shakes slightly in the moving process. The problems of pollution of the inner wall of the sleeve and the surface of the core rod, welding pollution of the core rod and assembly scratches in the assembly process are solved, the core rod does not need to be welded, batch production can be achieved, and a new thought is opened for industrial sleeve method assembly.

The invention relates to a radioactive contamination metal smelting decontamination method, which comprises the following steps of pretreating radioactive contamination metal, separating the radioactive contamination metal subjected to molten-state pretreatment through an electrochemical separation and / or magnetic separation technology, and separating the radioactive contamination metal by utilizing precipitation potential difference and Curie point difference between radionuclide and a metal main body, the metal main body and the radioactive contamination nuclide are separated, and a metal product after control releasing is obtained. According to the method provided by the invention, radionuclides and impurities in the radioactive pollution metal can be accurately separated, so that a metal product is effectively removed and controlled, effective recycling of waste metal in metal radioactive waste is realized, and the problems of storage pollution of the radioactive pollution metal and the like are solved. In addition, the method provided by the invention has the advantages that the operation process is simple, electrolysis raw materials are easy to obtain and low in price, the method is environment-friendly, and the operation cost is low.