68results about How to "Reliable mechanical properties" patented technology

The invention relates to a shale oil and gas yield evaluation model building and parameter calibrating method applied under a closed system. The method includes the following steps of (1) building a shale oil yield evaluation model, (2) building a shale gas yield evaluation model, (3) measuring the shale oil yield and the shale gas yield through experiments, and (4) calibrating dynamic parameters in the shale oil yield evaluation model and the shale gas yield evaluation model. Due to the facts that shale oil generation and secondary cracking are considered at the same time and the shale oil yield evaluation model and the shale gas yield evaluation model are built in the closed system, considering from the degree of approximation between an experiment condition and a geological condition, the method effectively achieves description of the complex process that shale oil generation and secondary cracking exist at the same time under the closed system, and can describe shale oil and gas characteristics quantificationally and dynamically. The shale oil and gas dynamic parameters calibrated according to the method are combined with the thermal history of the burial history of an actual basin for geological extrapolation, and obtained shale oil and gas hydrocarbon generation history information is more accurate and reliable.

The invention discloses an assembling type steel tube concrete combination column which comprises two column segments. Each column segment comprises a steel tube and a steel reinforcement cage distributed outside the steel tube, wherein the steel tube is filled with concrete, the steel tube and the steel reinforcement cage are cast by concrete so as to form exterior concrete. The first steel tube is provided with a plugging portion stretching out of a first matching face of a first exterior concrete portion. A first longitudinal steel reinforcement bar is provided with a reserved segment stretching out of the first matching face. One end of the second steel tube is fixedly connected with a steel sleeve. A first slot is formed in the steel sleeve. One end of a second longitudinal steel reinforcement bar is fixedly connected with a steel sleeve. A second slot is formed in the steel sleeve. The first matching face of the first column segment is opposite to the second matching face of the second external concrete portion. The plugging portion is plugged into the first slot of the steel sleeve, the reserved segment is plugged into the second slot of the steel sleeve, and sizing materials are injected into a gap between the plugging portion and the steel sleeve and a gap between the reserved segment and the steel sleeve. The assembling type steel tube concrete combination column has the advantages that the two column segments can be prefabricated, the manufacturing precision can be improved, the construction period is shortened, and the mechanical performance is reliable.

The invention relates to a material testing equipment, in particular, it relates to a hydrogen storage alloy testing equipment. It is formed from reaction chamber, hydrogen gas circulation system and liquor circulation system, in which between reaction chamber and hydrogen gas circulation system a quick joint is used to implement closed connection, the hydrogen gas circulation system can make the hydrogen gas be continuously circulated between the reaction chamber and hydrogen gas circulation system, and said liquid circulation system can make the constant temperature liquids with different temperatures be alternatively circulated between the opened container and oil bath so as to make the hydrogen storage alloy implement alternative circulation of absorbing and releasing hydrogen. In the course of hydrogen gas and liquid circulation the control and data acquisition system can be used for acquiring and processing data, and outputting signal to control system to make test.

The invention relates to a preparation method of a high-intensity composite material grid structure, which belongs to the technical field of composite material preparation and application. The method comprises the steps as follows: (1) a one-way fiber prepreg layering is designed; and a composite material prepreg fabric is prepared; (2) an extruding forming technique or a diepressing forming technique is adopted to implement solidifying and forming on the composite material prepreg fabric to prepare composite material corrugated plates; (3) the composite material corrugated plate is cut along a direction parallel to the ripple extension direction of a cross section to prepare composite material corrugated sheets; (4) resin is coated on the upper surface and the lower surface of the composite material corrugated sheet, the upper surface of the wave crest of the corrugated sheet and the corresponding lower surface of the wave trough of another corrugated sheet are stuck to form a hexagonal or rectangular grid structure, and then the upper surface of the wave peak of the grid structure and the corresponding lower surface of the wave trough of a third corrugated sheet are stuck; in the way, a plurality of corrugated sheets can be stuck to prepare the high-intensity composite material grid structure. The preparation method is simple and practical, and is suitable for high technology fields like aviation, aerospace, etc.

The invention discloses a device for testing the rigidity of a plate spring in a high-temperature environment. The current testing method is poor in testing precision, cockamamie in process and poor in universality as the current testing method is carried out after a spiral spring high-temperature testing device is transformed according to the structure and the shape of the plate spring. The device comprises a clamping device used for clamping the plate spring, a force testing device used for testing plate spring bearing loads, a lifting device used for regulating the position of the force testing device, a deflection measuring device used for measuring the deformation amount of the plate spring, a regulating device used for regulating the positions of stress action points of the plate spring, and an electromagnetic induction heating device used for stimulating the working temperature of the plate spring. With the adoption of the device for testing the rigidity of the plate spring in the high-temperature environment, the continuous measurement on different deflections and different stress action points can be realized; and the device is convenient to operate and reliable in test.

We present an invention on the synthesis of elastic, bio-compatible functional microstructures wherein the designed electrical functionalities are achieved by mixing conducting nano to micro-particles with PDMS gels. The methodology for constructing planar and three-dimensional microstructures by soft-lithographic technique is presented. Applications such as electrodes, conducting strips, two and three-dimensional microstructures for electrical wiring connections, micro heaters, micro heater arrays, flexible thermochromic displays, and applications for microfluidic devices are demonstrated, all with demonstrated elastic flexibility and fall-proof characteristics while maintaining their functionalities. Results obtained are very promising for the utilization of such composites in future micro-fabrications, especially for the bio-chips and microfluidic devices.

The invention discloses a 3D printed Ti-PDA-PLGA microsphere bone defect repair stent. A 3D printed Ti stent is prepared by a laser sintering technology. Then, under certain conditions, dopamine is self-polymerized on the fiber surface of the 3D printed Ti stent to form a PDA coating, thereby preparing a 3D printed Ti-PDA stent; then PLGA microspheres carrying VEGF are prepared by a double emulsion-solvent evaporation method, and finally, BMP-2 and PLGA microspheres carrying VEGF are adsorbed and immobilized on the surface of the stent by an adsorption method, and finally the 3D printed Ti-PDA-PLGA microsphere bone defect repair stent is formed. The bone defect repair tissue engineering stent disclosed by the invention has the advantages of reliable mechanical property, high biological activity and safety, convenient implantation, small trauma and low cost, and can be used for the repair treatment of bone defect after bone traumas, bone tumors and bone infection.

The invention discloses a tunnel advanced detection speed modeling method based on a reflected signal, and the method comprises the steps: obtaining X and Z component seismic signals through a conventional linear observation system; determining an i-th X and Z component reflection in-phase axes according to the negative speed features of a seismic wave, and selecting the X and Z component reflection wave groups of a seismic channel with the maximum offset; selecting the maximum amplitude time t1 of a negative phase from the reflection wave groups, and calculating the main polarization direction theta1 of t1; selecting a time window with the (t1+ / -1) cycle length from a seismic record; carrying out the shifting at a supposed speed Vi based on a seismic signal of the selected time window; carrying out comparison, and obtaining V1max of the maximum offset energy; calculating L1 (=V1max*t1), sequentially building an i-th speed through the main polarization direction theta1, V1max and L1, and building a final speed model. The method does not need to drill a hole for increasing a lateral offset, and saves manpower and time resources. Through the extraction of the effective reflection wave groups and the limiting of the range of the time window, the method effectively avoids the mutual interference of front and rear abnormal interface energy groups, and guarantees the accuracy of speed modeling.

The invention discloses a 3D printed Ti-PDA-PLGA microsphere bone defect repair stent and a preparation method thereof. A 3D printed Ti stent is prepared through a laser sintering technology; then, under a certain condition, dopamine is self-polymerized on the fiber surface of the 3D printed Ti stent to form a PDA coating, so that the 3D printed Ti-PDA stent is prepared; and then VEGF-carrying PLGA microspheres is prepared by a multiple emulsion solvent evaporation method, and finally the BMP2 and the VEGF-carrying PLGA microspheres are absorbed and fixed on the surface of the stent by an adsorption method, finally the 3D printed Ti-PDA-PLGA microsphere bone defect repair stent is prepared. The bone defect repair tissue engineering stent of the invention has the advantages of reliable mechanical property, high biological activity and safety, convenience in implantation, small trauma and low cost, which can be used for repairing treatment of bone trauma, bone tumor and bone defect afterbone infection.

The invention discloses a machinery wireless well deviation measurement instrument while drilling, which is composed of a tooth type measuring device, a pulse generating device and a cylinder body. The pulse generating device is located on the upper end of the tooth type measuring device and is connected with the tooth type measuring device by the inner gear of the cylinder body. When well deviation is measured, the slime pump is closed, the tooth type measuring device is rotated along the rotation of the bracket under the gravity action of the weight block until the gravitational potential energy is minimum; the well deviation angle is expanded by the accelerating gear group device and changed into the displacement of the pulse shaft by the gear in the process; then the pump is opened again, the displacement is changed into the pulse number which is corresponding to the well deviation angle one by one by the pulse generating device and is sent to the ground by the drilling fluid medium, thereby finishing the wireless measuring while drilling of the well deviation exactly and stably. The invention has simple structure, small volume, convenient operation, wide application, can be suitable for well deviation measurement and well quality control for the ground layer environment of high temperature and high pressure deep well and super deep well, and can be applied to the well track measurement of the positioning well, the horizontal well, the big displacement well and the branch well and the controlling engineering.

A preparation method of a flame-retardant epoxy foamed material is provided to mainly solve the technical problem of inhibition of the inflammable characteristic of epoxy foam, and has the advantages of low preparation cost, simplicity and reliable product quality. The method is characterized in that brominated bisphenol A type epoxy resin is compounded with antimony trioxide to improve the flame retardation performance of the epoxy foam, and a nanometer filler is added to enhance the strength of the epoxy foam. The flame-retardant epoxy foamed material prepared through the preparation method can be applied in high-tech fields of aerospace, vehicles, ships and electric appliance insulation.

The invention relates to a three dimensional (3D) printed PCL-PDA-AgNPs scaffold for anti-infective bone tissue engineering as well as a preparation method and application of the 3D printed PCL-PDA-AgNPs scaffold, belonging to bioengineered human implants. According to the method, poly(epsilon caprolactone) is used as a base material, polydopamine is used as a surface modification material, and silver nanoparticles with anti-infective biological properties are combined for use, so that the biological functions of anti-infection, bone growth promotion and bone defect repair are realized. The 3Dprinted PCL-PDA-AgNPs scaffold for the anti-infective bone tissue engineering has the advantages of being simple and reliable in structure, controllable in appearance and micro-structure, reliable inmechanical properties, controllable in ion release property, convenient in implantation, less in trauma and low in cost.

The invention relates to a three-layer type PVB (polyvinyl butyral) film with sound insulation performance and a preparation method. The three-layer type PVB film is prepared from resin films on a lower A layer, a middle B layer and an upper C layer through pressing, wherein the middle B layer is prepared from, in percentage by mass, 30%-60% of improved PBV resin powder and 40%-70% of a plasticizer; each of the lower A layer and the upper C layer is prepared from, in percentage by mass, 60%-80% of improved PVB resin powder and 20%-40% of a plasticizer; the improved PVB resin powder is prepared from components in percentage by mass as follows: 7.5wt%-10.0wt% of polyvinyl alcohol, 3.0wt%-10.0wt% of butanal, 1.0wt%-6.0wt% of hydrochloric acid, 0.01wt%-0.10wt% of a surfactant and the balance of pure water. The preparation method comprises steps as follows: preparation of the improved PVB resin powder and preparation of the three-layer type PVB film. The three-layer type PVB film has the function of insulating noise at 1,000-4,000 Hz after being applied to sandwich glass and improves the sound insulation effect by 3-5 dB.

The invention discloses a self-hole-forming and self-tapping shearing force connection piece and a construction method thereof. By means of the self-hole-forming and self-tapping shearing force connection piece, a laminated wood beam and a light-weight aggregate concrete flange are combined together. The self-hole-forming and self-tapping shearing force connection piece comprises a drill bit, a chip storage groove, a thread, a limiting joint, a nail rod and a hexagon head. The nail rod comprises a smooth section and a threaded section. The smooth section is poured in the bottom face of the light-weight aggregate concrete flange, and the threaded section is nailed into the top face of the laminated wood beam. The limiting joint capable of controlling the depth by which the shearing force connection piece is embedded in wood at any embedding angle is arranged between the smooth section and the threaded section. The self-hole-forming and self-tapping shearing force connection piece can be applied to floors and roofs of houses, landscape architecture and bridges of garden scenic regions and other structures.

The invention provides a pump body assembly and a compressor. The pump body assembly comprises a motor, a crankshaft, a first bearing and a second bearing, wherein one end of the crankshaft is used for being connected with the motor, the first bearing is arranged on the other end of the crankshaft in a sleeving mode, and the second bearing is arranged on the crankshaft in a sleeving mode; the second bearing comprises a first bearing section, a clearance bearing section and a second bearing section which are connected in sequence, and the second bearing section is connected to the end, facing the first bearing, of the clearance bearing section; the second bearing further comprises a second bearing annular groove surrounding the crankshaft, and the second bearing annular groove is located inthe end wall, facing the first bearing, of the second bearing section; and a groove is formed in the inner side wall of the clearance bearing section, or a groove is formed in the peripheral wall, corresponding to the clearance bearing section, of the crankshaft. According to the pump body assembly, through the arrangement of the groove, viscous resistance loss can be reduced, and lubrication ofthe upper end of the second bearing can be improved; and through the arrangement of the second bearing annular groove, the root abrasion of the second bearing can be improved.

The invention discloses a 3D printing Ti-hydrogel-osteoblast bone tissue engineering support and a preparation method thereof. The method comprises the following steps of enabling Ti6Al4V powder to beprocessed into a 3D printing Ti support with a porous structure by utilizing SLM technology; then filling a hydrogel-osteoblast mixture in the pores of the 3D printing Ti support under a certain condition so as to prepare a 3D printing Ti-hydrogel-osteoblast bone defect repair support. The support has the advantages that the structure is simple and reliable, the shape and microstructure are controllable, the mechanical property is reliable, the implantation is convenient, the trauma is small, and the cost is low.

The invention relates to a steel pipe restraining concrete joint structure comprising chord members and web members. The chord members and the web members comprise steel pipes and reinforcement mesh frames. One ends of the reinforcement mesh frames are pre-embedded in the steel pipes through common concrete correspondingly, and the other ends of the reinforcement mesh frames all extend out of thesteel pipes. The chord members and the web members are mutually connected through the external reinforcement mesh frames, and ultrahigh-performance concrete is poured in the connecting positions of the chord members and the web members. The structure is simple, the advantages of high bearing capability and easy construction are achieved, and the defect of steel pipe fatigue caused by welding of the adjacent steel pipes in the communicating positions of steel pipe concrete truss joints is overcome.

The invention relates to an assembled four-piece combined circular steel pipe concrete inner support structure and a manufacturing method, and belongs to the technical field of support and support in foundation pits of subway stations. The prefabricated four combined circular steel pipe concrete inner support structure includes different types of circular steel pipe concrete straight supports. Including short straight stay and standard straight stay. The straight supports are connected to each other by high-strength bolts. All components are composed of ultra-high-strength concrete filled round steel pipes, and the cross-sections of four round steel pipes are arranged in a square. The present invention satisfies the splicing needs of supports in foundation pits of different lengths by combining different forms of component lengths, and provides an assembled combined circle with high rigidity, reusability and low cost, which can be used as internal supports in the foundation pit or shaft enclosure structure system The inner support structure of concrete filled steel tube can effectively solve the problems of complex construction and high cost of concrete support. The comprehensive benefit is remarkable, and it has important engineering application value and development prospect.

The invention relates to a preparation method of a sample for measuring the semisolid injection forming mechanical property of a magnesium alloy. The preparation method is characterized by comprising the following steps of: (1) solidifying a mould of a mechanical property sample die cavity with a mould frame of a magnesium alloy semisolid injection forming machine by inlaying and bolting manners to be combined into a mechanical property sample mould; (2) heating magnesium alloy crumbs to ensure that slurry is positioned in a semisolid and semi-molten state; (3) evacuating the solidified combination, then injecting the semisolid and semi-molten magnesium alloy slurry in the step 2 into a mould, controlling the heating temperature of a fixed material tube, the heating temperature of the mould and the injection speed, demoulding the solidified and formed magnesium alloy by selecting a mould release agent and interrupting samples with different thicknesses for measuring. By using the method, the mechanical property fluctuation measured by different samples with different thicknesses is small, so that the mechanical property reached by a magnesium alloy material in the semisolid injection forming can be better reflected and estimated.

The invention discloses a composite reinforcing bar pre-tensioning method prestressed concrete pile connected with displaceable sleeves for connection. The concrete pile comprises a plurality of prestressed steel bars, a plurality of non-prestressed steel bar portions, at least one sleeve and two end plates. The prestressed steel bars and the non-prestressed steel bar portions are evenly distributed between the two end plates in the circumferential direction. The number of the non-prestressed steel bar portions is one or more. The non-prestressed steel bar portions comprise at least two non-prestressed steel bars. Every two adjacent non-prestressed steel bars are connected with one sleeve or directly and fixedly connected. The displaceable sleeves are adopted for connecting the non-prestressed steel bars, and steel bar connection force transfer is more direct and more reliable through the mechanical connection way; the steel bars at the two ends of the sleeves can relatively displace according to the set before tensioning, non-prestressed steel bar mechanics is not produced or small tension force is produced, and the composite reinforcing bar pile model mechanical property is more reliable.

The invention discloses a radial bogie mechanism, which relates to the technical field of motor vehicle structures and can effectively solve problems of the traditional bogie radial mechanism in the form of a deputy frame. One end of a left front pull rod is hinged on a left front axle box; the other end of the left front pull rod is hinged at the left end of a front cross beam; one end of a right front pull rod is hinged on a right front axle box; the other end of the right front pull rod is hinged at the right end of the front cross beam; one end of a left rear pull rod is hinged on a left rear axle box; the other end of the left rear pull rod is hinged at the left end of a rear cross beam; one end of a right rear pull rod is hinged on a right rear axle box; the other end of the right rear pull rod is hinged at the right end of the rear cross beam; the front cross beam is hinged on the left of the center of a frame; the rear cross beam is hinged on the right of the center of the frame; and the front cross beam is connected with the rear cross beam through a coupling rod so as to realize linkage between wheel pairs. As each wheel pair moves towards a radial position when a bogie passes through a curve, the radial bogie mechanism is beneficial for reducing an attack angle between a wheel rim and a steel rail so that the wear of the wheel rim is reduced and the adhesiveness of a motor vehicle on the curve is improved. The radial bogie mechanism is mainly used for bogies of motor vehicles or trucks.

The invention relates to an articular cartilage microstructure nanoindentation inlaying and water-retaining sample stage and an experiment method. The sample stage is composed of a stage body, a containing groove, sleeve, an articular cartilage and a resin. The articular cartilage microstructure nanoindentation inlaying and water-retaining sample stage can solve the problems that the surface of a cartilage sample is difficult to treat and the surface of the cartilage is dehydrolyzed when an inlaying method is adopted, so that the whole tested sample does not have any micro disturbance in the surface treatment and test processes. The sample stage treats the surface of the cartilage in a grinding and polishing manner, and can effectively show the microstructure of the surface of the cartilage; and the sample can not cause disturbance in the grinding and polishing process and the test process. All the existing nanoindenters in China basically depend on import, and water-retaining assemblies thereof are high in cost. The experiment method lowers the experiment cost, and the credibility is higher than that of an assembly configured on the nanoindenter.

The invention belongs to the technical field of part machining, and relates to a single-layer closed wave spring precision machining control method and a machining die, and the method comprises the following steps: 1) according to the design requirement of a part to be machined, a stamping die is used for manufacturing a raw material into an annular blank; (2) the annular blank in the step (1) is subjected to cold stamping forming, and a rough machining part is obtained; (3) the rough machining part obtained in the step (2) is corrected, so that the size of the rough machining part is consistent with the prefabricated height size of the part to be machined, and the parallelism between wave crests of the rough machining part is kept within 0.1 mm; (4) the corrected rough machining part is subjected to heat treatment, and a semi-finished machining part is obtained; and (5) the semi-finished machined part is subjected to strong pressing treatment, and machining is completed. The wave spring manufactured through the method is stable in size, reliable in mechanical property and good in fatigue resistance and deformation resistance, and the service requirement of the wave spring on an aero-engine can be completely met.

The invention provides a 3D-printing PCL-PMMA-vancomycin anti-infection bone scaffold, and a preparation method and an application thereof and belongs to engineering human implants. In the method, poly-epsilon-caprolactone and polymethyl methacrylate serve as base materials and vancomycin serves as an anti-infection medicine, thus achieving biofunctions of anti-infection and promotion of osseointegration and bone defect filling surrounding the implant. The method includes: firstly, extruding PCL to form fiber bundles through a melting extrusive shaping 3D printing technology, and preparing a 3D-printing PCL scaffold by means of the jointing structure of different layers and angles of the fiber bundles; then under certain conditions, adding a PMMA monomer solution to a powder, and adding the vancomycin to the PMMA to prepare a PMMA-vancomycin mixture; filling the gaps in the 3D-printing PCL scaffold with the PMMA-vancomycin mixture in a semi-fluidized period, thereby forming the 3D-printing PCL-PMMA-vancomycin anti-infection bone scaffold. The bone scaffold has simple and reliable structure, controllable appearance and microstructure, reliable mechanical properties and controllability of medicine release performance. The bone scaffold is convenient to implant and is invasive-less and low-cost.

The invention discloses a transformer oil rapid aging reactor. The transformer oil rapid aging reactor comprises a reactor, which contains transformer oil, and is divided into a liquid part and a gas part; a temperature control module, which comprises a heating element, a PID controller and a main control unit that is used for sending a heating instruction to the PID controller to enable the PID controller to control the heating power of the heating element; a liquid testing module, which comprises a liquid pump, a first regulating valve, a first cooling device, a first infrared spectrometer and a first heating device, which are connected in sequence; an atmosphere control module, which comprises an air extractor, a second regulating valve, a second cooling device, a second infrared spectrometer and a second heating device, which are connected in sequence; and an electromagnetic field control module, which comprises a parallel voltage plate placed in the liquid, a coil and a voltage regulator, wherein the voltage regulator is connected with the PID controller and used for adjusting the voltage of the parallel voltage plate or the coil. According to the reactor provided by the invention, the aging process of the transformer oil is scientifically and effectively analyzed in combination with multiple factors, and the accuracy of the analysis result is improved.

The invention discloses a DVOR (Doppler Vor) omnidirectional range reflective net antenna damping system. A damping support I is arranged between an upper strut and a lower strut of a reflective net bracket, a damping support II is arranged between a reflective net and an antenna orbit, and the two damping supports are high-damping rubber gaskets with built-in gasket lined steel plates. The system is reasonable in design and convenient to install, and is easy to replace when the rubber is aged after installation; the damping support I is arranged between a steel girder and the orbit, so that contact between meshes and the orbit is radically avoided, and the trample problem during overhauling or construction is solved; the damping supports serving as dampers consume energy inside, thus effectively counteracting the influence of wind load on an orbit antenna under severe weather and reducing the vibration frequency and times of the antenna orbit; the antenna orbit is effectively separated from the reflective net steel girder, thus avoiding resonance caused by the same frequency with the reflective net; and the damping support II prolongs the natural vibration period of the structure and reduces the vibration frequency of the structure without influencing the structural strength.

The invention discloses a titanium microalloying seamless line pipe and a preparation method of the titanium microalloying seamless line pipe. The line pipe comprises the following components of, by weight percentage, 0.13% <= C <= 0.16%, 0.15% <= Si <= 0.35%, 1.25% <= Mn <= 1.40%, S <= 0.002%, P <= 0.01%, 0.02% <= Ti <= 0.04%, Nb <= 0.01%, V <= 0.01%, 0.02% <= Al <= 0.04%, N <= 0.005%, Cr <= 0.1%, Ni <= 0.08%, Cu <= 0.08%, Mo <= 0.01% and the balance Fe and inevitable impurities, wherein 0.008%+3.42 [N]+3 [S] <= Ti <= 0.012%+3.42 [N]+3 [S]. The single titanium alloying line pipe which is excellent in comprehensive performance and low in cost is successfully prepared by strictly controlling the content of each chemical component in the line pipe.

The invention discloses a prefabricated assembling joint which is characterized by comprising prefabricated active powder concrete pipes, a connection steel pipe, an inner concrete column and steel beams, wherein the upper and lower layers of prefabricated active powder concrete pipes are adhered to two ends of the connection steel pipe through adhesives; longitudinal steel bars of the inner concrete column are welded on the inner wall of the connection steel pipe; the steel beams are connected with the connection steel pipe through end plates and bolts, or connected to a joint through a short limb beam welded on the side surface of the connection steel pipe. According to the prefabricated assembling joint, an assembling structure of a prefabricated active powder concrete pipe combination column-steel beam is realized; compared with an existing steel pipe concrete-steel beam assembling joint, the novel assembling joint is high in constructability and mechanical property, and is outstanding in fire resistance, durability and economy; furthermore, more resources and energy can be saved, so that the prefabricated assembling joint meets the requirement for sustainable development.

This invention relates to a computer controlling device of performance testing of hydric material storage equipped with computer program, and is composed of the main body of computer with controlling programs. The mainframe collects the data of the temperature and the pressure transmitters through the program and the multi-functional data collecting card, and controls the switches of the electrical valve and the electromagnetic valve. And meanwhile, it sends the contact signal to the counting relay. The control program is composed of PCT curve testing module, the temperature and pressure history curve module, the dynamics testing module, the cycle life-span testing module and exiting module. This invention has strong automatic capacity, high reliability, complete testing parameters, high precision of testing, wide applying area, low cost.

The invention provides a clamping device for high-speed stretching of automotive plastics. The clamping device comprises a first clamping unit, a second clamping unit, and a sleeve bushing. The firstclamping unit and the second clamping unit are symmetrically located at both ends of the sleeve bushing, and the second clamping unit has the same structure as the first clamping unit. The first clamping unit comprises a clamping head, a connecting piece, and two sliding blocks, wherein the clamping head has a U-shaped structure and comprises a connecting end and an open clamping end; and the inner width of the clamping end is smaller than the inner width of the connecting end. The sliding blocks are all located in the clamping head, and cooperate with the clamping head, and a gap is formed between the sliding blocks. According to the clamping device for high-speed stretching of the automotive plastics, the gap between the two sliding blocks can be adjusted, thereby effectively clamping asmaller sample, which expands the size range of a test sample of a testing machine, and increases the test capability.