76results about How to "Ensure mechanical stability" patented technology

The invention relates to high temperature-resistant polyacrylate pressure-sensitive adhesive emulsion and a preparation method and application thereof. The emulsion mainly consists of a hard monomer, a soft monomer, a functional monomer, reactive tackifying resin, a reactive emulsifier, an initiator and a curing agent. The preparation method comprises the following steps of: adding a monomer dissolved with the tackifying resin into the aqueous solution of the reactive emulsifier for pre-emulsification by adopting the pre-emulsification semi-continuous seeding polymerization process, performing polymerization on the pre-emulsified liquid through the initiator, and adding the curing agent to prepare the high temperature-resistant polyacrylate pressure-sensitive adhesive emulsion. The pressure-sensitive adhesive of the invention has heat resistance of 200 DEG C, has excellent water resistance, aging resistance and mechanical property, and can be widely applied to the fields of electronics, electrical appliances, automobile manufacturing and the like.

The invention discloses a composite hydrogel, a preparation method and application thereof. The preparation method includes: firstly, blending polyvinyl alcohol (PVA), sodium carboxymethyl cellulose (CMC) and monomer pyrrole (Py), and then taking glutaraldehyde as the cross-linking agent to prepare CMC and Py embedded polyvinyl alcohol single-network hydrogel under an acidic condition, then at a low temperature, soaking the obtained single-network hydrogel in an FeCl3 solution of appropriate concentration to obtain polypyrrole / sodium carboxymethyl cellulose-Fe<3+> / polyvinyl alcohol (PPy / CMC-Fe<3+> / PVA) double-network composite hydrogel. By applying the composite hydrogel to a strain sensing patch, finally a composite hydrogel strain sensing patch with high mechanical strength, elasticity,conductivity and strain sensitivity can be obtained. The invention opens up a new way for in-situ synthesis of polypyrrole in hydrogel, and provides a new idea and new method for application of a hydrogel strain sensor in wearable field.

An orthopedic device for ball and socket joint reconstruction. The anchor stem is adapted to be anchored in a medullary canal. A proximal portion of the anchor stem includes a threaded hole oriented along a longitudinal axis thereof. Metaphyseal portion includes a proximal end with recess and a longitudinal bore in fluid communication with the recess, and a distal end adapted to interface with the proximal portion of the anchor stem. An anti-rotation structure is preferably located at an interface of the anchoring stem to the metaphyseal portion to prevent rotation of the anchor stem relative to the metaphyseal portion around the longitudinal axis. A fastener is provided to extend through the longitudinal bore and to engage with the threaded hole on the anchor stem to fix the metaphyseal portion to the anchoring stem. The locking assembly is located in the recess and mechanically couples the head of the fastener to the metaphyseal portion to limit rotation of the fastener relative to the metaphyseal portion. An insert with an articular surface is provided that engages with the proximal end of the metaphysical portion and extends over the recess in the metaphyseal portion.

The invention relates to a well and rock salt solution mining-well recharging filling circulation mining method. Particularly, a solution mining method is adopted for high-recovery-ratio mining of well and rock salt; meanwhile, waste residues generated in alkali preparation, salt preparation or coal burning process are filled in a salt mining solution cavity by a well recharging filling process method; and the solution mining of the well and rock salt and the well recharging filling circulation of the waste residues are implemented simultaneously. According to the method, various types of well and rock salt resources can be sufficiently mined, the method is particularly suitable for mining of ultra-thick well and rock salt resources, the recovery ratio of the well and rock salt resources can be improved obviously lengthwise and crosswise, and the service life of a salt well is prolonged; the waste residues generated in the alkali preparation, salt preparation or coal burning process are filled in the cavity, so that the ground environment pollution is avoided, the resource utilization of the waste residues is implemented, and the ground sinking can be avoided.

A secondary cell capable of ensuring thermal and mechanical stabilities required for a high-capacity cell with a simple structure is provided. The secondary cell includes: a can; and an electrode jelly-roll wound with two different electrodes and a separator interposed between the electrodes therein and accommodated in the can, the outer surface of the electrode jelly-roll being wound around one more turn with the separator. Only the separator is wound at the core of the electrode jelly-roll to form a rod-like stability member which is cured by absorbing heat generated from the cell. The separator wound at the core of the electrode jelly-roll is continuous from a portion of the separator which is stacked with the two different electrodes.

The invention discloses an intelligent monitoring three-dimensional composite underwater vehicle shell body and a preparation method of the intelligent monitoring three-dimensional composite underwater vehicle shell body. The underwater vehicle shell body comprises a plurality of layers of structures from exterior to interior and comprises four parts of a corrosion resistance layer, an impact resistance layer, a rigidity layer and a metal sealing layer, one or more strain sensors is / are adopted in the impact resistance layer and the rigidity layer of a three-dimensional composite structure at the same time and introduced into the three-dimensional composite structure, and the stress state of the structure of the shell body is monitored through sensing of the micro-strain of the shell body in the working process. The three-dimensional prefabricated part structure guarantees the mechanical stability of the whole shell body, meanwhile, due to the arrangement of the impact resistance layer and the rigidity layer, the composite underwater vehicle shell body can adapt to different complex underwater environments.

The invention provides a production method of an HRB500E high-strength and anti-seismic rebar. The production method comprises the step that a billet is manufactured. The billet is prepared from the components in percentage: 0.20%-0.25% of C, 0.40%-0.70% of Si, 1.30%-1.60% of Mn, less than or equal to 0.045% of P, less than or equal to 0.045% of S, 0.020%-0.050% of V, 0.0050%-0.0120% of N, and thebalance of Fe and inevitable impurities; the components are basically the same as component formulas used in the production of HRB400 and HRB400E, steel has multiple stages, namely, by adjusting rolling processes, the production of HRB500E and HRB400E can be realized with the same chemical composition formula. Therefore, according to the production method of the HRB500E high-strength and anti-seismic rebar, a unified production technique can be adopted in the preparation of raw materials and blank, the production efficiency is improved favourably, the frequencies of adjusting preparation parameters such as temperature and the proportion of the components are reduced, the stability of products is improved, and the production efficiency is improved favourably.

The invention discloses a construction process of filling type epoxy coating steel strand inhaul cables. The process is characterized by including the following steps of S1, making a preparation before cable hanging; S2, installing and tensioning steel strands, wherein traction installing and tensioning of the steel strands and the cable force averaging, classified tensioning and tensioning forcecalculating of the steel strands are included, the construction process of the cable force averaging and classified tensioning of the steel strands includes the step of cable force averaging and tensioning after cable hanging and tensioning of all the steel strands in each stay cable, an equivalent tensioning method is adopted for the cable force averaging, two stages of tensioning are included, the first stage of tensioning is conducted till 80% of the target cable force is reached, and the second stage of tensioning is conducted till 100% of the target cable force is reached; S3, ejecting clamping pieces; S4, installing accessories and conducting anticorrosion treatment, wherein installing of anti-loose pressing plates, installing of dampers, blocking of the bottoms and pipe openings ofbeam end embedded pipes, installing of extending pipes and waterproof covers and anticorrosion treatment of anchor heads are included. By means of the construction process, the stay cables can be rapidly and reliably replaced, and detailed standardized operation reference is provided for existing bridge stay cables.

A shaving apparatus having at least one cutting unit (5) is provided which is able to shave both short and rather long hairs. The cutting unit comprises an external cutting member (7) and an internal cutting member (9) movably arranged with respect to the external cutting member, and a driver (11) for moving the internal cutting member. The external cutting member is provided with a shaving section (13) having two mutually connected lateral borders (15, 17) between which hair entry apertures with cutting edges (23) are provided. The internal cutting member is provided with cutting elements (25) having cutting edges (27) for cooperation with the cutting edges of the external cutting member. A number of the hair entry apertures is formed by laterally open recesses (21) each extending between two substantially flat lamellae (29) of the external cutting member, which lamellae have free ends (29a, 29b) positioned between the borders of the shaving section.

The invention discloses a preparation method of a magnesium alloy surface micro-arc oxidation / intelligent slow-release structure integrated composite coating, and belongs to the technical field of metal surface treatment. The method comprises the steps that a layer of compact micro-arc oxidation film framework structure is formed on the surface of magnesium alloy, then, a magnesium alloy sample with the micro-arc oxidation film (MAO) framework structure is immersed into modified hydrogel, and after the modified hydrogel is loaded with a corrosion inhibitor, the micro-arc oxidation / intelligentslow-release structure integrated composite coating is formed on the surface of the magnesium alloy. The prepared MAO film metallurgically combined with a matrix restrains the stripping effect of damage boundary position matrix filiform corrosion on the coating, the hydrogel in microholes forms a micro-nano slow-release structure with the reliable mechanics guarantee and responses to the micro-area corrosion in a long-acting mode to release the corrosion inhibitor, and corrosion self restraining is achieved.

The invention discloses super-transparent acrylate pressure-sensitive adhesive emulsion capable of being coated at a high speed. The super-transparent acrylate pressure-sensitive adhesive emulsion is prepared from the following raw materials in parts by weight: 60 to 90 parts of an acrylate soft monomer, 3 to 25 parts of an acrylate hard monomer, 0 to 10 parts of a functional monomer, 2 to 10 parts of a high-refractive-index monomer, 0 to 0.05 part of a molecular weight regulator, 0.1 to 0.8 part of a reactive anionic emulsifier, 0.1 to 0.5 part of a reactive non-ionic emulsifier, 0.02 to 0.1 part of a defoaming agent, 0 to 0.08 part of a base material wetting agent, 0.2 to 1.0 part of an initiator and water; the pH (Potential of Hydrogen) value of the pressure-sensitive adhesive emulsion is 7.5 to 8, and the solid content is 40 percent to 55 percent. The pressure-sensitive adhesive emulsion disclosed by the invention can be coated at the high speed (150m / min to 300m / min), and an adhesive surface has no defects including bubbles and the like; the stripping force is not lower than 2.0N / 10mm, and the light transmittance can reach 90 percent or more; the super-transparent acrylate pressure-sensitive adhesive emulsion can be widely applied to protective adhesive films in the fields of manufacturing decoration, electronics, electrical appliances, automobile industries and the like.

The invention relates to a 5A06H14 sheet metal with a thickness of 8.5mm, and a preparation method thereof. The invention relates to a sheet metal and a preparation method thereof. The invention aims at solving the problems of unstable alloy ingot strength, low yield strength, low tensile strength, and large unevenness of 8.5mm-thick 5A06H14 sheet metals produced with prior arts. The preparation method comprises the steps of: 1, material blending; 2, smelting; 3, casting; 4, homogenizing annealing; 5, sawing, edge planing and surface milling; 6, aluminum coating; 7, hot rolling; 8, cold rolling; 9, pre-stretching; and 10, sawing. With the steps, the 8.5mm-thick 5A06H14 sheet metal is obtained. With the method provided by the invention, the prepared 8.5mm-thick 5A06H14 sheet metal has a yield strength of 373-420MPa, a tensile strength of 285-330MPa, an elongation of 8% to 12%, an unevenness less than 8mm / m, and a same plate difference less than 0.25mm. The method provided by the invention is applied in industrialized productions of 5A06 sheet metals.

An orthopedic device for ball and socket joint reconstruction. The anchor stem is adapted to be anchored in a medullary canal. A proximal portion of the anchor stem includes a threaded hole oriented along a longitudinal axis thereof. Metaphyseal portion includes a proximal end with recess and a longitudinal bore in fluid communication with the recess, and a distal end adapted to interface with the proximal portion of the anchor stem. An anti-rotation structure is preferably located at an interface of the anchoring stem to the metaphyseal portion to prevent rotation of the anchor stem relative to the metaphyseal portion around the longitudinal axis. A fastener is provided to extend through the longitudinal bore and to engage with the threaded hole on the anchor stem to fix the metaphyseal portion to the anchoring stem. The locking assembly is located in the recess and mechanically couples the head of the fastener to the metaphyseal portion to limit rotation of the fastener relative to the metaphyseal portion. An insert with an articular surface is provided that engages with the proximal end of the metaphysical portion and extends over the recess in the metaphyseal portion.

The invention discloses an anti-pulling three-dimensional rubber friction-pendulum earthquake-isolation support. The anti-pulling three-dimensional rubber friction-pendulum earthquake-isolation support comprises two concave-surface discs correspondingly arranged up and down, a rubber interlayer pad arranged between the two concave-surface discs and two earthquake-isolation discs arranged on the upper side of the concave-surface disc at the upper portion and arranged on the lower side of the concave-surface disc at the lower portion respectively; the upper side and the lower side, in contact with the two concave-surface discs, of the rubber interlayer pad are each provided with a friction slice, vertical belleville springs are connected between the concave-surface discs and the earthquake-isolation discs, first pulling cables are connected between the opposite inner sides of the two concave-surface discs, and second pulling cables are connected between the opposite inner sides of the two earthquake-isolation discs. The anti-pulling three-dimensional rubber friction-pendulum earthquake-isolation support is combined with the advantages of a rubber support and a friction-pendulum support, and the curvature of the rubber interlayer pad and the friction coefficient of a friction pendulum are designed respectively to achieve the advantages of multistage fortifying earthquake isolation; the pulling cables can provide vertical pull for improving the anti-pulling performance of the support, the vertical earthquake-isolation discs can isolate vertical earthquake motion to meet the three-dimensional earthquake-isolation requirement, and the anti-pulling three-dimensional rubber friction-pendulum earthquake-isolation support is more suitable for practical engineering and is convenient to apply and popularize.

In a method for producing a porous SiO2-xerogel starting solution containing a silicon compound is provided and organic monomers and an organically modified alkoxysilane are added to the starting solution. During gelification of the silicon compound, the organic monomers and the organically modified alkoxysilane react in situ to form organic solid skeletal supports in the silicon network. The resulting gel is dried under subcritical conditions and the solid skeletal supports removed by thermal oxidation.

The invention discloses a steel roof system, which comprises at least two parallel chord steel roof trusses and at least two parallel chord trusses connected with the two neighboring parallel chord steel roof trusses; the parallel chord steel roof trusses comprise an upper chord member and a lower chord member which are arranged in parallel, as well as a vertical web member and / or an inclined web member connected with the upper chord member and the lower chord member; the parallel chord trusses comprise an upper chord member and a lower chord member which are arranged in parallel, as well as the inclined web members connected with the upper chord member and the lower chord member, and two inclined stay bars respectively connected with the two ends of the lower chord member, wherein the upper chord member, the lower chord member and the two inclined web members connected with the two ends of the upper chord member and the lower chord member form an inverse trapezium; the at least two parallel chord steel roof trusses are arranged in parallel; the two ends of the upper chord member of the parallel chord trusses are respectively connected with the lower chord members of the two parallel chord steel roof trusses arranged adjacently; and the outer ends of the two inclined stay bars of the parallel chord trusses are respectively connected with the lower chord members of the two parallel chord steel roof trusses arranged adjacently. The steel roof system can realize unlimited span, simplify the structure system and reduce the steel consumption simultaneously when guaranteeing stability.

A magnetically inductive flow meter including a first electrode arrangement for galvanically contact detection of an induced voltage dependent on the flow velocity of the medium as a first measurement signal, and a second electrode arrangement for capacitive detection of an induced voltage as a second measurement signal, wherein by determining and evaluating characteristic parameters of the first and second measurement signals, diagnostic messages on the status of the medium and / or the flow meter are obtained, such as the content of gas bubbles in the fluid, electrode corrosion, electrical conductivity of the medium, damage to the electrically insulating interior lining of the measuring tube, deposits on electrodes, magnetic interference fields, electrode short-circuits and / or the fill level of the measuring tube.

The invention discloses a blast construction method of an orientation window in the demolition blasting process of a brick chimney. The orientation window is in a right triangle ABC shape. Lofting marking is carried out through a total station. The orientation window comprises triangular-orientation-window vertexes A, B and C and sides AB, AC and BC of the triangle. Protective layers are reserved at the portions, close to the sides, in the triangle ABC, the portion, left after the protective layers are reserved, of the triangle ABC of the wall of the chimney is in a triangle A'B'C' shape, hole distributing and hole drilling are carried out in the triangle A'B'C' of the outer wall of the chimney through an air drilling machine, and drilled holes include the blast holes and the guide hollow holes; and explosive charging blasting is carried out on the blast holes, bricks blasted to be loose are removed through a portable machine, the protective layers are removed through an air pick or other machines, and the bottom face and the slope of the triangular orientation window ABC are ground through tools such as a light cutting machine. The blast construction method has the beneficial effects that labor intensity is small, the construction progress is rapid, the construction period is shortened, mechanical abrasion is small, labor cost is low, comprehensive construction cost is low, the orientation window is accurately constructed, and it is guaranteed that the reserved portion, except for the orientation window, of the wall of the chimney is complete in structure, free of overexcavation and insufficient excavation and the like.

The invention discloses a novel preparation method of a foamed nickel-supported cobalt acid ferrous submicron tube material and the application of the material in the electrode of a super capacitor. Ferric nitrate, cobalt nitrate and oxalic acid are adopted as raw materials, and the tubular FeCo2O4 material grows on the surface of a foamed nickel substrate through the template-free chemical sedimentation and heat treating process. The diameter of each tube is within the range of 600 to 900 nm. Based on submicron units and a stable structure thereof on the surface of a nickel substrate, the method has an important significance on the mechanical stability. Meanwhile, a tube array is uniformly distributed on the surface of a three-dimensional substrate to form a porous structure. The electrode material can be directly applied to a capacitor without the need of any binder, so that the high capacitive performance is ensured. In addition, the preparation method is simple to operate, low in cost, easy to control and large in scale.

The invention discloses an antibacterial functional gradient porous HA-Ag bone filling scaffold with an active interlayer and belongs to the technical field of biomedical material preparation. The functional gradient porous HA-Ag bone filling scaffold material with the active interlayer is prepared by weighing and ball-milling hydroxyapatite HA and Ag powder according to an ingredient proportion, weighing and mixing mixed powder and an ammonium bicarbonate pore former according to a porosity proportion, preparing three kinds of powder, then laying the powder in a gradient manner, mechanically pressing into a block pressed blank, putting the pressed blank into a discharge plasma sintering furnace, performing sintering after vacuuming a system to 2-6Pa, heating at a rate of 50-100min / DEG C, keeping at 800-1000 DEG C for 5-10min, and cooling to room temperature in the furnace. The material can induce adhesion and proliferation of bone cells on the surface of the material actively, has good osteogenesis activity and antibacterial property, high porosity and mechanical stability at the same time, and can serve as a good artificial bone filling material.

The invention provides a subzero treatment process of a TC6 titanium alloy forge piece. Firstly, a TC6 titanium alloy bar is heated and subject to forging treatment including axial upsetting, radial drawing-out chamfering and finally rounding and upsetting; the forged TC6 titanium alloy forge piece is subject to solid-solution treatment, dual low-temperature annealing treatment is carried out, andfinally, aging treatment is carried out; finally, subzero treatment is carried out; uniformity and stability of an inner structure of the TC6 titanium alloy forge piece are improved, heat stress generated in the heat treatment process is eliminated, in the microstructure, grains are refined, a dislocation structure is led in, in the aspect of macro-mechanical properties, strength and plasticity of materials can be effectively improved, and the mechanical stability of the materials is kept.

The invention discloses a device and method for controlling the motion mode of resonant metal nanoparticles. The device is composed of a laser, a polarization converter, a spatial light modulator, a diffraction optical element, an attenuation slice and an immersion lens. The method comprises the steps that an angular polarized light field with complex distribution of spatial phases is generated through the polarization converter, the spatial light modulator and the diffraction optical element, and the light field is focused through the immersion lens. The metal nanoparticles located within the range of the focal field can obtain balanced positions in the optical axis direction and the radial direction. The particles can be fixed outside the axis or rotate around the optical axis by changing the type of the loaded phase of the spatial light modulator. The motion trail of the particles can be flexibly regulated and controlled through the method of switching the loaded phase. According to the method, strong scattering force generated by resonant metal particles in the traditional optical tweezer technology and the damage of the heat effect to control stability are overcome, and the device and method have great application prospects in a series of fields related to optical control.

A starter for an internal combustion engine is provided which includes a pair of angular contact ball bearings used to support an armature shaft. The bearings are disposed close to opposed ends of a core of an armature. The core has disposed thereon coils which define a commutator on one of the ends of the core. One of the bearings is disposed within an inner periphery of the commutator. This structure results in a decreased interval between the bearings, thus ensuring stability in supporting the armature shaft during rotation, which results in decreased mechanical vibrations, magnetic noises, and wear of the bearings.

A method is disclosed for energy calibrating quantum-counting x-ray detectors in an x-ray installation. A target (6), for producing x-ray fluorescence radiation, is positioned between the first x-ray source (1) and first x-ray detector (2) and irradiated with x-radiation of the first x-ray source (1) in such a way that x-ray fluorescence radiation which strikes the second x-ray detector (4) from the target (6) is produced by the x-radiation of the first x-ray source (1). The second x-ray detector (4) is then energy calibrated by way of the x-ray fluorescence radiation of the target (6). The first x-ray detector (2) can be energy calibrated in the same way with the aid of the x-radiation of the second x-ray source (3). With the proposed method, the x-ray detectors of a dual-source CT x-ray installation can be calibrated with little expenditure under conditions close to those of the system.

The invention relates to high temperature-resistant polyacrylate pressure-sensitive adhesive emulsion and a preparation method and application thereof. The emulsion mainly consists of a hard monomer, a soft monomer, a functional monomer, reactive tackifying resin, a reactive emulsifier, an initiator and a curing agent. The preparation method comprises the following steps of: adding a monomer dissolved with the tackifying resin into the aqueous solution of the reactive emulsifier for pre-emulsification by adopting the pre-emulsification semi-continuous seeding polymerization process, performing polymerization on the pre-emulsified liquid through the initiator, and adding the curing agent to prepare the high temperature-resistant polyacrylate pressure-sensitive adhesive emulsion. The pressure-sensitive adhesive of the invention has heat resistance of 200 DEG C, has excellent water resistance, aging resistance and mechanical property, and can be widely applied to the fields of electronics, electrical appliances, automobile manufacturing and the like.