214results about How to "Meet pressure requirements" patented technology

The invention relates to a testing system for deep soil freezing / thawing process, which is structurally characterized in that a temperature-controlled box is connected with an external cold bath; a high pressure-resistant organic glass cylinder is arranged on a temperature-controllable steel base; two small holes are formed in the base, one is connected with a water guide pipe, and the other is connected with a pressure adjusting pipe; a permeable stone, a piece of filter paper and a sample are sequentially arranged at the upper part of the lower base, and a temperature sensor is mounted in the sample; a temperature-controllable upper press head is arranged at the upper part of the sample; a line leading-out hole is formed in the upper press head, and is sealed through sealant after the line is lead out; the upper press head is connected with the transmission rod of a testing machine; a measuring cylinder is connected with the sample through the water guide pipe; and the measuring cylinder is arranged on a weighing sensor and fixed through a bracket. By adopting the testing system, the freezing / thawing process of the deep soil can be rather systematically researched, so as to obtain the frost heaving rate and the water absorbing / draining rate of the deep soil which is in different depths frozen under the different temperature gradients. The testing system provides the technical guarantee for the research in clarifying the action of the external load on the forming processes of the freezing soil and the frozen soil cold-formed structures, and the mutual action of the temperature, the moisture content and the pressure of the soil body in the process of freezing under the high-pressure action.

The invention discloses a method and device for testing rock drillability of deep well drilling and extra-deep well drilling. The device comprises a machine frame (1), a high temperature and high pressure loading mechanism and a micro drill bit rock breaking drilling depth measurement mechanism, wherein the high temperature and high pressure loading mechanism and the micro drill bit rock breaking drilling depth measurement mechanism are arranged on the machine frame (1). The device exerts confining pressure, pore pressure and fluid column pressure on rock samples in cavities in three axes, overburden pressure is exerted on the rock samples through a hydraulic pump, and therefore the high pressure environment of the stratum of the bottom of a well can be simulated, the relation between the drilling depth and the time is tested through a displacement sensor at the position of a micro drill bit, optimization of the drilling pressure, the rotating speed and the drilling fluid type and drilling machinery drilling speed prediction are achieved. The method and the device have the advantages that the requirements for the bottom hole temperature and the pressure can be met in the deep well drilling process and the ultra-deep well drilling process, the function of testing multiple sets of rock drillability values through a single time of experimental testing of deep well drilling is achieved, the efficiency of the single time of experimental testing is greatly improved, and experimental cost is reduced.

The invention relates to a batch experimental device of water-rock reaction in CO2 geological storage. The batch experimental device comprises a reaction kettle, a CO2 gas cylinder, a water inlet pipe and a first exhaust valve, wherein a kettle head and a kettle body of the reaction kettle are connected by a detachable ring seal, the kettle body is arranged in a heater, and water and rock samples are arranged in the kettle body; the CO2 gas cylinder is connected into the kettle body through a first gas valve; the water inlet pipe is connected into the kettle body through a water inlet valve; and the first exhaust valve is connected into the kettle body. The batch experimental device can meet the temperature and pressure requirements of CO2-water-rock reaction, enable a CO2-water-rock reaction experiment to add sufficient water, rock and gas samples, prevent bringing air during the process of adding gas and maintain constant pressure during the reaction process, and further has the characteristics of simple operation and more economic property.

The invention discloses a high-strength steel plate used for glass lining, comprising the following chemical components by weight: 0.06-0.15% of C, 0.15-0.50% of Si, 0.5-1.5% of Mn, less than or equal to 0.02% of P, 0.008-0.035% of S, 0.001-0.05% of Al, 0.003-0.015% of N, 0.001-0.035% of O, 0.001-0.05% of Ti, less than or equal to 0.10% of Cu, less than or equal to 0.10% of Cr, less than or equal to 0.10% of Ni, less than or equal to 0.10% of Mo, and the balance of Fe and other unavoidable impurities, wherein the product of Ti and N is less than or equal to 0.003%. Correspondingly, the invention further discloses a manufacturing method of the high-strength steel plate used for glass lining. The high-strength steel plate used for glass lining has the comprehensive mechanical properties of high strength, good plasticity, good scaling resistance, good sealing property and good welding property, and on the like.

The invention provides a hot-rolled high strength steel sheet used in double-face enamel and a preparation method thereof, comprising the following chemical composition: C: 0.05 to 0.15 weight percent, Si: less than or equal to 1.0 weight percent, Mn: 0.5 to 2.0 weight percent, P: less than or equal to 0.05 weight percent, S: less than or equal to 0.05 weight percent, Al: 0.01 to 0.10 weight percent, N: 0.008 to 0.015 weight percent, Ti: less than or equal to 0.05 weight percent, V: 0.02 to 0.2 weight percent, and the rest are Fe and inevitable impurities. By controlling the hot rolling technology and the cooling speed, second phase particles which are tiny and dispersed are ensured to be generated from vanadium and titanium in the steel, thus enhancing the strength, fish scaling resistance and adherence of the steel sheet; and the products after enamel firing can still maintain higher strength, thus better meeting the compression resistance requirements of different porcelain products, and being capable of being used for producing chemical reaction tanks and water treatment tanks and the like from double-face enamel.

The invention discloses a variable-speed permanent-magnet alternator system and a double-port voltage stabilization control method therefor. The system comprises a permanent-magnet alternator, a PWM (Pulse Width Modulation) rectifier, a DC filtering device and a controller, wherein the controller comprises a rotor position and rotational speed detection module, a DC voltage detection module, a DC current detection module, an AC voltage detection module, an AC current detection module, a coordinate transformation module, a first regulator, a second regulator, a current limit module and a PWM generating module. The method provided by the invention comprises the following steps: acquiring the position, the rotational speed, the DC voltage and current, and the AC voltage and current of the alternator rotor; and acquiring the quadrature-axis and direct-axis currents through coordinate transformation, so as to stabilize the DC and AC voltages for setting values and achieving amplitude limit to quadrature-axis and direct-axis currents generated by a target subjected to closed-loop control and generate PWM trigger pulses to control the PWM rectifier. By adopting the invention, double-port voltage stabilization of a DC and AC output terminal is maintained when the rotational speed of the alternator changes, the cost is low and the reliability is high.

The invention relates to a natural gas energy recovery process by use of pressure difference (ranging from 0.4MPa to 25MPa) between a main line and a branch line between a natural gas delivery main line pipe and a branch line pipe. By adopting the process, pressure difference energy can be recovered, and natural gas getting in and out of processing equipment conforms to the existing pressure requirement for natural gas delivery. The natural gas pressure difference energy recovery process can be used in two ways as follows: power is utilized for power generation, that is, the gas pressure energy is converted into mechanical energy and output for applying work by a direct mode; and the gas with pressure is expanded by virtue of pressure energy and refrigerated to produce liquefied natural gas.

The invention relates to a formula and a production technology of a polyurethane low-speed solid tire and belongs to the technical field of high-polymer material products. The formula is characterized by comprising the following raw materials in parts by weight: 0.8-1.5 parts of polyester polyol, 0.15-0.25 parts of toluene diisocyanate, and 0.1-0.15 parts of curing agent component. The production technology is characterized by specifically comprising the following steps: dehydrating the polyester polyol and adding toluene diisocyanate to firstly obtain a prepolymer; and respectively feeding the prepolymer and the curing agent components into tanks A and B of a casting machine, mixing according to the weight parts and casting into a tire casting die, performing casting forming, and performing secondary vulcanization. The integrated solid tire having completely identical internal material, external material and performances is prepared by virtue of the formula technology and the formula, and the technology can be realized by performing primary cast forming through the tire casting die, and the production technology of the tire can be greatly simplified.

The invention relates to a high-speed particle impact testing device comprising a pressure exciting unit, a testing range guiding tube which is in gas communication with the output end of the pressure exciting unit and particles which have diameters matching with the inner diameter of the testing range guiding tube and are driven by the pressure exciting unit to go ahead at high speed in the testing range guiding tube. One end of the testing range guiding tube, which is close to the pressure exciting unit, is radially provided with a particle filling opening; and the pressure exciting unit comprises an air compressor, an air input opening, and a supercharging pump connected with the air output opening of the air compressor. The invention utilizes compressed air to drive the air-air supercharging pump so that the air pressure can be improved to the measurement standard; in addition, the invention is easy to implement and has low manufacturing cost due to the adoption of the prior air compressor and the prior supercharging pump; moreover, the invention can regulate the high pressure for the particles to move at high speed in the testing range guiding tube so that the high-speed particle impact measurement result can be more reliable and the quality of the object to be measured is guaranteed.

The invention relates to a high pressure resistance irradiation crosslinking environment-friendly and flame-retardant rubber and plastic composite material and a preparation method thereof. A formula of the composite material comprises raw materials in parts by weight: 15 to 45 parts of high-density polyethylene, 25 to 50 parts of elastomer resin, 10 to 30 parts of EBA, 5 to 25 parts of flexibilizer, 60 to 100 parts of flame retardant, 0.8 to 2 parts of antioxidant, 1 to 2 parts of lubricant, 0.03 to 0.1 part of crosslinking agent and 1 to 2.5 parts of crosslinking sensitizer, wherein the elastomer resin is prepared from polyurethane elastomer and ethylene propylene diene monomer elastomer, and a mass ratio of the polyurethane elastomer to the ethylene propylene diene monomer elastomer is 1 to (1 to 3). According to the composite material disclosed by the invention, the formula is improved; for example, the polyurethane elastomer and the ethylene propylene diene monomer elastomer are utilized as the elasomer resin, the high-density polyethylene and the EBA are added, meanwhile the matters of the flexibilizer, the flame retardant, the antioxidant and the like are added in an auxiliary mode; thus, the composite material disclosed by the invention has excellent wear resistance, flame resistance and heat resistance, a higher gel content can be obtained, and a pressure-resistant requirement of the material in a high-temperature welding process is met.

The invention discloses an encapsulated inductor and an assembly process thereof. The encapsulated inductor comprises a framework and a protective cover, wherein the surface of the framework is wound with a copper wire coil; the framework is arranged in the protective cover, and the framework and the protective cover are concentric; the protective cover is provided with a wire outlet used for extending a copper wire of the copper wire coil; both ends of the framework in the protective cover are provided with a bus bar respectively, and both ends of the copper wire coil are clamped on the bus bars respectively; both ends of the protective cover are provided with an end cover plate respectively; pressing plates are arranged between the end cover plates and the bus bars and are connected with the bus bars; the protective cover is provided with insulating pins; and cured epoxy resin layers are arranged at contact positions of the protective cover and the end cover plates, at contact positions of the insulating pins and the protective cover, between the framework and the end cover plates, and between the outer surface of the framework and the inner wall of the protective cover. The assembly process of the encapsulated inductor comprises three steps. The encapsulated inductor can meet the operational requirements on high voltage and high current / instantaneous high current impact, and is low in manufacturing cost, safe and reliable.

According to a method disclosed in the invention for increasing yield of rectisol and / or liquid oxygen wash greatly and saving energy through pressure swing adsorption technique, the desulfurized gas or transformed gas is divided into two branches. One branch enters a pressure swing adsorption decarburization device for decarburization, and the other branch enters a low-temperature methanol carbon washing device for decarburization. The decarburized gas after decarburization of the voltage swing adsorption decarburization device enters a voltage swing adsorption hydrogen purification device for obtaining hydrogen product, and a hydrogen-nitrogen synthesis gas is obtained after allocating the nitrogen. The decarburized gas after decarburization of the voltage swing adsorption decarburization device enters a liquid hydrogen washing device, and the hydrogen-nitrogen synthesis gas is obtained after purification. After mixing the two branches of hydrogen-nitrogen synthesis gas and compressing the mixture in a synthesis gas compressor, the compressed gas enters an ammonia synthesis period. The invention also discloses a device for realizing the method. A yield increase amplitude which is higher than 50% can be realized according to the invention.

The invention relates to a steel for marine hose armor layers in deep sea and a preparation method thereof, belonging to the technical field of metallurgy. The steel comprises the following components in percentage by weight: 0.06-0.16% of C, 0.10-0.50% of Si, 0.8-1.5% of Mn, 1.0-3.0% of Cr, 0.3-1.0% of Mo, 0.01-0.03% of Al, at most 0.3% of Ni, at most 0.003% of S, at most 0.015% of P, and the balance of Fe and inevitable impurities. The tensile strength is 800-840 MPa, the yield strength is 720-795 MPa, and elongation percentage is 14.1-16.3%. The method comprises the following steps: (1) smelting and casting; (2) heating to 1150-1220 DEG C, and soaking for 30-50 minutes; (3) carrying out hot rolling, cooling with water, and spinning; (4) slowly cooling, and coiling; (5) carrying out cold drawing to obtain cold-drawn flat steel; and (6) carrying out hardening and tempering heat treatment. The steel for marine hose armor layers in deep sea has the advantages of excellent acid corrosion resistance and excellent mechanical properties. The method is low in cost. The product has favorable comprehensive properties.

The invention discloses a hot-rolled steel strip used for enamel and having ultra-deep-punching performance and a preparation method of the hot-rolled steel strip. The hot-rolled steel strip comprises the following chemical components in percentage by weight: not less than 0.005% and not more than 0.010% of C, not more than 0.05% of Si, not less than 0.10% and not more than 0.30% of Mn, not less than 0.040% and not more than 0.080% of Ti, not more than 0.025% of P, not less than 0.010% and not more than 0.035% of S, not less than 0.010% and not more than 0.060% of Als and not more than 0.006% of N. The preparation method comprises the steps of vacuum treatment of molten steel, steel billet casting, heating, high-pressure water descaling, rough rolling, coiling by a hot coil box, precision rolling, cooling, coiling and flattening. Compared with the prior art, the hot-rolled steel strip prepared with the method has good deep-punching performance, fish-scaling resistance and welding performance, meets a pressure-resistant requirement of a water heater container, and can be used for replacing cold-rolled steel for enamel to manufacture the water heater container with an ultra-deep-punching requirement.

The invention discloses a device and a method for quickly constructing a small water cellar. The device disclosed by the invention comprises an inflatable air bag corresponding to the inner wall of the water cellar and a steel pipe for inflating the air bag, wherein the steel pipe is inserted into the air bag and is fixedly connected with an upper port and a lower port of the air bag in a sealing manner. The method for quickly constructing the small water cellar by use of the device comprises the steps of excavating a foundation pit, pouring to form a cellar bottom, putting a constructing device, charging air at 5-6kpa to the device, pouring to form cellar walls and a cellar top, sucking air in the device and taking out the device; using cement mortar, waterproof mortar and cement to treat fine aggregate concrete inner walls; and finally, mounting a cellar cover. The device and the method for quickly constructing the small water cellar have the characteristics of the structure is simple, the use is convenient, the labor can be saved, the cost is reduced, and the construction period is shortened. In addition, the constructed water cellar is firm and durable.

The invention discloses an encapsulated sustained-release acid for oil-water well reconstruction and a preparation method thereof. The encapsulated sustained-release acid comprises a capsule core and a sustained-release supporting layer coated on the outer layer of the capsule core, wherein the capsule core is a soluble or meltable solid acid, the sustained-release supporting layer comprises a sustained-release wall material and a supporting wall material, the sustained-release wall material is an organic fatty acid or a derivative thereof, the supporting wall material is acrylic resin or a derivative thereof, and the solid acid is solid hydrochloric acid powder or citrate. The encapsulated sustained-release acid is a spherical granule with the particle size of 0.15-0.25 mm. The encapsulated sustained-release acid also comprises an adhesive spray-coated on the capsule core, wherein the adhesive is water-soluble vegetable gum or a derivative thereof, and is specifically guar gum, hydroxypropyl guar gum or carboxymethyl hydroxypropyl guar gum. According to the invention, the control mode of the acid radical ion consumption is simple and accurate; the preparation process is simple; and the encapsulated sustained-release acid is reliable in performance, safe for transportation and carrying, and convenient for use, and can be used for reducing the probability of underground tool acid corrosion and operation personnel damage in the application.

The invention discloses a construction method of an outer wrapped concrete obliquely pulling and buckling and ring and section dividing combination method. A whole bridge is divided into six rings of an edge box bottom plate, a lower web, an upper web, an edge box top plate, a middle box bottom plate and a middle box top plate; the semiarch rib of each ring is divided into three working surfaces; each working surface comprises three sections; nine pouring sections exist; three sections are poured for each ring in each time; the sections are poured in three times; before pouring outer wrapped concrete, buckling cables and balance cables are arranged in the arch springing regions, and the cable force is tensioned according to the design requirements. By using the construction method, the construction safety risk in the prior art is effectively reduced, the proportioning of concrete with high grade and the template design are facilitated, the operation is simple, the cost is saved, the construction period is short, and the linear shape and the stress of arch rings can be effectively controlled.

The invention belongs to the technical field of hydraulic oil pipes and particularly discloses a high-pressure or super-high-pressure hydraulic oil pipe suitable for cranes especially heavy machinery and a production method thereof. According to the technical scheme, the high-pressure hydraulic oil pipe comprises an inner rubber pipe layer, an outer rubber pipe layer, a plurality of wound or braided pressure-resistant steel wire layers disposed between the inner rubber pipe layer and the outer rubber layer, and a rubber pipe layer disposed between two pressure-resistant steel wire layers. A cloth layer is wound on the outer wall of the inner rubber pipe layer or the rubber pipe layer. The inner rubber pipe layer or the rubber pipe layer are wound or braided by the pressure-resistant steel wire layers. The cloth layer is integrated with the inner rubber pipe layer or the rubber pipe layer by means of adhering. By the high-pressure hydraulic oil pipe, diameter of wound steel wires can be increased, pressure resistance of the prepared high-pressure hydraulic oil pipe is improved greatly, and the pressure resistance requirements of the high-pressure hydraulic oil pipe for hydraulic equipment such as a large crane are satisfied.

The invention discloses a grouting bag and an application method. The grouting bag comprises an integrally-sealed bag body. The bag body is provided with at least one grouting port, and the bag body is made of elastic materials. When slurry capable of being cured is injected into the bag body, the bag body can be automatically expanded along with inflow of slurry. After grouting of the grouting bag, the space around the position where the grouting bag is located can be fully filled, the grouting bag is closely attached to the part between two steel shear keys through deformation of the grouting bag, and after the slurry is solidified, an anti-shear structure achieving shear force transmission through a cushion layer is formed between the two steel shear keys, good adaptability and high practicability are achieved in an immersed tunnel irregular anti-shear support system, and the problem of local stress concentration caused by other connecting manners can be effectively avoided; and meanwhile, the grouting bag can be used in the place with the narrow operation space, and due to the construction convenience of the grouting bag, the construction cost can be effectively reduced.

The invention provides an inner cover of a one-way exhaust decompression plastic bottle installed on an opening part of a plastic bottle, and the inner cover is used for solving the technical problem that air pressure in a bottle body rises and cannot be released. The inner cover of the one-way exhaust decompression plastic bottle is characterized in that a one-way exhauster is arranged at the middle part of an inner cover body (1), and the one-way exhauster is as follows: an exhaust pipe (2) is arranged at the middle part of the inner cover; an elastic sealing element (3) blocks an upper opening part (4) of the exhaust pipe, and a lower opening part (5) of the exhaust pipe is communicated with the lower cavity of the plastic bottle. The inner cover of the one-way exhaust decompression plastic bottle can be used for effectively preventing from dangerous accident of cracking caused by over-high air pressure in the bottle body, and preventing external air from entering the bottle body to pollute the food, so as to ensure the food health..

The invention belongs to the technical field of mobile heat supply and concretely relates to a novel mobile heat accumulation and release method and a mobile heat supply device. The mobile heat supply device comprises a water accumulation tank and a transporting device, wherein the water accumulation tank is fixedly arranged on the transporting device, a heat exchange pipe is arranged inside the water accumulation tank, an inlet and an outlet of the heat exchange pipe are positioned at the outer part of the water accumulation tank, a cold water filling pipe is connected onto the water accumulation tank, a first pressure meter, a first thermometer and a pressure release valve are connected onto the water accumulation tank, the top of the water accumulation tank is connected with a steam pipe, and the bottom of the water accumulation tank is connected with a heat water outlet pipe. The mobile heat supply device has high heat accumulation capability and can fully utilize industrial waste heat of various kinds, such as smoke, steam or hot water, so the energy sources are fully utilized and are saved.

The invention discloses a hydraulic turbine generator. The hydraulic turbine generator comprises a hydraulic turbine room and a power generation room; the hydraulic turbine room is provided with a water inlet and a water outlet that have equal calibers and overlapped axes, and are opposite in the directions; a rotating wheel is arranged in the hydraulic turbine room; the rotating wheel is composed of a wheel disc and a water bucket or blades; the hydraulic turbine generator further comprises a reducing pipe connected with the water inlet and an increasing pipe connected with the water outlet; between the inner wall of the hydraulic turbine room and a rotatable sweeping space of the rotating wheel, a design of uniform small clearances is adopted; the power generation room is arranged at the outer side of the hydraulic turbine room; preferably, a contraction angle of the reducing pipe is 15-30 degrees; preferably, the axial length of the reducing pipe is greater than the inside diameter of the large opening; the clearance between the inner wall of the hydraulic turbine room and the rotatable sweeping space of the rotating wheel is less than or equal to 1mm, and less than or equal to 0.5mm preferably. Compared with the prior art, the hydraulic turbine generator disclosed by the invention has the beneficial effects of greatly increasing the velocity of water flow which impacts the blades of the rotating wheel, raising a specific rotary speed and loading ability of the rotating wheel, and further improving power generation efficiency; and meanwhile, the hydraulic turbine generator further has the beneficial effects of keeping the velocity of tail water, and being convenient in mounting and the like.

A sample pretreatment method of a laser Raman natural gas analyzer and a device thereof belong to the technical field of petroleum and natural gas detection devices. The method comprises the following steps: opening an explosion-proof thermostat, putting a sample bottle into the thermostat, and successively connecting the sample bottle, a pressure gage, a first pressure-regulating valve, a first filter (1 micron), a second filter (0.1 micron), a second pressure-regulating valve, an unloading tee, a standard gas inlet, a pressure gage, a flowmeter and an analyzer interface; closing the thermostat, switching on a power supply of the thermostat to heat to a required temperature value, and keeping constant temperature; closing the unloading tee and a valve at the standard gas inlet, adjusting the pressure-regulating valve, carrying out gas-path purging, and connecting to the analyzer through the analyzer interface. As a natural gas sample is heated, a heavy hydrocarbon component in the sample is in a gaseous state and enters a gas path. Thus, the distortion problem of the natural gas sample due to condensation of heavy hydrocarbon is solved.

The invention discloses an all-electric ground strength testing device and belongs to the technical field of measurement. The device mainly solves the problems that a hydraulic actuator is high in requirement for environment and low in efficiency, and the detection period of a wedging type technique is long. The device is mainly characterized by comprising an installation machine frame, a pressure sensor, a transmission device, a servo motor, a ball screw, a piston rod, a cylinder barrel, a transition sleeve, a spring, a spring base and a force measurement contact, the cylinder barrel is installed on the machine frame, and the piston rod is located in the cylinder barrel; the ball screw is in thread fitting with the axial center of the piston rod; the transmission device and the servo motor are installed on the cylinder barrel; the pressure sensor is installed on the top of the ball screw; the spring and the spring base are located in the transition sleeve, the spring base is connected with the transition sleeve, and the spring is installed on the bottom of the piston rod; the force measurement contact is installed on the spring base. The device can detect the bearing strength of the ground quickly and accurately so as to meet the requirements of different kinds of equipment for ground strength, and is mainly used for detection the bearing strength of the ground.

The invention discloses a hydrodynamic device capable of precisely controlling pressure and a boosting method. The hydrodynamic device comprises a gas boosting pipeline system and a liquid boosting pipeline system which are connected to a pressure port in parallel, wherein the gas boosting pipeline system comprises a gas cylinder, a booster pump, a medium pressure stop valve, a filter, a pressure reducing valve, a high pressure stop valve III and a high pressure stop valve IV which are sequentially connected; a medium pressure relief valve and a high pressure gas storing tank are connected to a connecting pipeline between the booster pump and the medium pressure stop valve; a gas high-pressure boosting cylinder and a high-pressure relief valve are connected to a pipeline between the high pressure stop valve III and the high pressure stop valve IV; the liquid boosting pipeline system comprises a normal pressure liquid container, a liquid high pressure stop valve I and a liquid high pressure stop valve II which are sequentially connected; and a liquid boosting cylinder is connected to a pipeline between the liquid high pressure stop valve I and the liquid high pressure stop valve II. Confining pressure can reach 100MPa, the pressure output range is large, the gas leakage quantity is small, the confining pressure is independently regulated, the fluctuation is small, and the pressure is controlled in a segmented manner. In a range between 0.1MPa and 100MPa, the pressure control precision is 0.1MPa in pressure raising and lowering processes. The pressure control precision is high, the vibration is small, and the noise is low.

The invention relates to a module-type assembled air boost device and system. The device comprises a cabin body formed by a plurality of assembled monomers connected in sequence, a cabin sealing member and a fixing member are arranged between two adjacent monomer reinforcing rings, the cabin sealing member is embedded in the gap between the monomer reinforcing rings, a cabin door is formed in themiddle of a front sealing head, and the contact edge of the cabin door and and the front sealing head is provided with a door sealing member. In the module-type assembled air boost system, an oxygen generator is connected to a glass rotor flowmeter, the glass rotor flowmeter is connected to a first check valve, the first check valve is connected to a first quick-plug hose, and the first quick-plughose is connected to a diffuse oxygen-supply port located inside the cabin; and an air compressor is connected to a water separation-air filtration device, the water separation-air filtration deviceis connected to a precision filter, the precision filter is connected to a second check valve, the second check valve is connected to a second quick-plug hose, and the second quick-plug hose is connected to a first muffler located inside the cabin. According to the present invention, module-type assembly and a split design of cabin body are adopted, which meets the pressure bearing conditions of the cabin body after assembly, and is convenient for transportation and installation.

The invention discloses a bioreactor for intravascular stent degradation and fatigue performance test and a test method thereof. The bioreactor comprises a biofermentation tank, wherein a first inletof the biofermentation tank is sequentially connected with one ends of a culture cavity, a loop test device, a four-way valve and a three-way valve through a pulse flowing pipeline; the rest two endsof the three-way valve are respectively connected with one ends of a metering pump and a peristaltic pump through the pulse flow pipeline; the pulse flow pipeline arranged at the other ends of the metering pump and the peristaltic pump are connected to the biofermentation tank through the four-way valve; a vascular substitute is arranged in the culture cavity; the two ends of the vascular substitute are respectively connected with the biofermentation tank and a first loop test device; an intravascular stent is arranged inside the vascular substitute. The metering pump and the peristaltic pumpare used for providing pulse flow for the intravascular stent in vitro degradation experiments and fatigue test; the biofermentation tank is used for providing a fluid environment more similar to theenvironment inside the body, so that the in vitro degradation and fatigue performance test of the intravascular stent at different blood pressure pulse features and flow rates can be realized.

A mobile motor train unit extra-high voltage resistance detecting device comprises a low-voltage electric cabinet, a high-voltage electric cabinet and an electric vehicle. The low-voltage electric cabinet and the high-voltage electric cabinet are fixed on the electric vehicle. The low-voltage electric cabinet and the high-voltage electric cabinet are electrically connected through an electric and communication connector. The output high voltage of the high-voltage electric cabinet is connected to the vacuum breaker of a motor train unit high-voltage equipment box. The mobile motor train unit extra-high voltage resistance detecting device has the advantages that the device can be moved optionally, and experiments can be performed on lines with safety protection; voltage resistance experiments on lines with extra-high voltage resistant wires can be avoided, and equipment utilization rate is increased; the device is compact in structure, free of production safety risks and wide in application range; the device has overvoltage and overcurrent fast disconnection protection, short circuit current limitation, a main loop automatic grounding discharge function and the like in terms of electric control, and safety is achieved sufficiently; voltage resistance time is saved, experiment steps are simplified, and extra-high voltage resistance experiments can be performed fast, accurately and safely after motor train unit grouping.

The invention provides a multi-axial direction composite material bent pipe and a preparation method thereof. The multi-axial direction composite material bent pipe is integrally formed by using a soluble core mold and using a heat expansion pressure process; the soluble core mold is heated to be molten through soluble bonding agents in the core mold resin mixture; after the cooling shaping, a solid-state core mold is obtained; the core mold resin mixture comprises quartz sand, soluble bonding agents and short cut fiber. The process characteristics of the soluble core mold and a heat expansionpressurization method are combined; the problem of demolding and peripheral pressurization difficult point problem in the bent pipe structure shaping of the special-shaped composite material is solved; the whole preparation of the special-shaped bent pipe is realized.