39results about How to "Reduce driving pressure" patented technology

The invention discloses a method for preparing an aluminum silicon carbide composite material. Liquid metal aluminum is filled in a porous silicon carbide substrate which is prepared from spherical silicon carbide powder and spherical silicon powder which serve as raw materials and has a three-dimensional through hole structure through an injection molding process so as to form a bicontinuous phase, the density of the aluminum silicon carbide composite material and the product uniformity are improved, and a high-strength AlSiC substrate is obtained by changing molding pressure, adjusting ingredients of the spherical powder with different particle sizes, adding a pore-forming agent, and sintering at the temperature of between 1,400 and 2,400 DEG C. The porous substrate is fixed in a cavityof an injection machine, and the liquid metal aluminum enters the cavity from an injection port and is filled in through holes of the AlSiC substrate through a gas-liquid mixed injection process so as to form the aluminum silicon carbide composite material with a silicon carbide and metal aluminum bicontinuous phase structure. The aluminum silicon carbide composite material prepared by the process has the heat conductivity of 190 to 280 W / mK and the thermal expansion coefficient of 5.5 to 11.5*10(-6)K at room temperature of 200 DEG C, and has high rigidity, low density, high weldability and low machining amount.

A sampling system and method for use in pipes or in boreholes beneath the earth's surface, including the use of flexible borehole liners, the liners provided with a diffusion barrier to prevent contamination of fluid samples obtained by the system and method. There is provided a flexible diffusion barrier in the construction of a flexible fluid sampling liner, so as to nearly eliminate concern for diffusion transport into or out of the liner. The flexible diffusion barrier may be incorporated into and constructed with known devices, called spacers, in use with flexible borehole liners. The diffusion barrier according to the present disclosure is attached or secured by a suitable means to the interior surface, or the exterior surface, or both surfaces, of the flexible borehole liner. In one embodiment, a spacer with a diffusion barrier prevents both the diffusion into the liner, and the diffusion out of the liner, in the interval subtended by the spacer length.

The invention discloses a photonic crystal optical fiber methane sensing device based on modular interference. The device is composed of a broadband light source, an optical circulator, a photonic crystal optical fiber methane sensor cladding an air hole coated polymer sensitive film, a testing air chamber, a switching valve, a quality flow controller, a spectrum analyzer and a computer, wherein the optical fiber methane sensor consists of a single mode fiber, a photonic crystal optical fiber and a welding area of the two fibers; the adopted photonic crystal optical fiber refers to an endless single mode solid core photonic crystal optical fiber; the polymer sensitive film refers to a polycarbonate resin methane sensitive film containing a cage molecule E-(OC2H5)6, and the inner wall of the cladding air hole of the photonic crystal optical fiber is coated with the film by virtue of an air pressure driving device; when the to-be-tested methane gas acts with the sensitive film on the inner wall of the cladding air hole of the photonic crystal optical fiber, the refractive index of the sensitive film changes, the reflection interference spectrum characteristic wavelength of the sensor is moved, the average movement amount shown in the description of the reflection interference spectrum characteristic wavelength before and after contacting the sensor with the methane gas is analyzed, so that the concentration of the to-be-tested methane gas can be obtained. The device disclosed by the invention has the characteristics of high sensitivity, high stability, high selectivity and the like.

A flexible bore hole liner, such as may be used to line or seal a hole drilled into the earth's surface, and featuring a diffusion barrier to prevent undesirable cross-contamination during, for example, sampling of subsurface fluids. The sampling liner includes a flexible diffusion barrier so as to reduce diffusion transport of contaminant(s) into and / or out of the interior volume of a bore hole liner. This flexible diffusion barrier may be incorporated into the construction of a portion of known borehole liner systems. The diffusion barrier is attached by a suitable means to the liner and / or the “spacer” accompanying the liner. The diffusion barrier prevents diffusion into and / or out of the liner in the sampling interval subtended by the spacer length, preventing cross-contamination of fluid samples obtained by the liner systems currently in use.

A sampling system and method for use in pipes or in boreholes beneath the earth's surface, including the use of flexible borehole liners, the liners provided with a diffusion barrier to prevent contamination of fluid samples obtained by the system and method. There is provided a flexible diffusion barrier in the construction of a flexible fluid sampling liner, so as to nearly eliminate concern for diffusion transport into or out of the liner. The flexible diffusion barrier may be incorporated into and constructed with known devices, called spacers, in use with flexible borehole liners. The diffusion barrier according to the present disclosure is attached or secured by a suitable means to the interior surface, or the exterior surface, or both surfaces, of the flexible borehole liner. In one embodiment, a spacer with a diffusion barrier prevents both the diffusion into the liner, and the diffusion out of the liner, in the interval subtended by the spacer length.

The invention provides a kind of mini-type jet pump and its preparation method. The pump body includes drive structure and suck structure. The drive structure is made up of ejector nozzle, drive chamber connected to the ejector nozzle; the drive chamber is installed drive liquid inlet hole. The suck structure includes suck entrance end, suck interval channel, and diffusion exit. The ejector nozzle is installed at the diffusion exit; the suck interval channel is installed at the both sides of the ejector nozzle. The high pressure driving gas or liquid is entranced into drive chamber by the drive liquid inlet hole, and jetted with high speed at the exit of the ejector nozzle; as well as, the vortex is appeared at its boundary, the liquid in the suck interval channel is sucked by the vortex scroll to jet; the mixed liquid with the two different flow rate mixed liquid are both flowed into the diffusion exit. The preparation of the mini-type jet pump adopts MEMS technology design to realize by two piece photo etching plate; the selection range of the pump body material is large; and it is easy to integrate with most micro flow system.

The invention discloses a composite type air cleaner for pipeline descaling. The composite type air cleaner comprises a blade cleaning mechanism and a nozzle. The blade cleaning mechanism and the nozzle are connected into a whole through self-lock threads. The blade cleaning mechanism comprises inner-layer blades and outer-layer blades. The inner-layer blades and the outer-layer blades are staggered and stacked together. The nozzle is composed of an inlet cavity, a cavitation resonant cavity and small jet flow holes. Due to the fact that the cavitation mechanism is adopted for cleaning a pipeline, the cleaning efficiency is much higher compared with traditional cleaning ways. By the adoption of two-stage composition of the blade cavitation cleaner and the cavitation nozzle, the cavitation effect is improved compared with a single-stage cavitation cleaner. By the adoption of the composite type air cleaner, needed driving pressure is lower than 10 MPa, and the risk is lowered compared with traditional high-pressure water jet flow cleaning technology. The cavitation cleaner is simple in structure and low in manufacturing cost, and therefore the needed cost is lower compared with traditional PIG cleaning technology.

The invention belongs to the technical field of multistage treatment of water, wastewater or sewage, and discloses a water purification treatment method based on adsorption and solid-liquid separation. Organic pollutants in water are treated by a specific surface area of powder active carbon; the organic pollutants in the water are transferred from a dissolved state to a suspended state by adsorption, so that organic matter subjected to phase transfer is attached to the active carbon, and then a water purification process is realized through physical separation by a microfiltration membrane. Turbid substances, calcium, iron and high-stability organic complex compounds of the turbid substances, calcium and iron are removed in coagulation, pre-oxidation and activated carbon adsorption processes, so that influence on the membrane flux is reduced; and the use time and the membrane flux of the microfiltration membrane are improved by using the activated carbon as the adsorbent to treat a pre-oxidizing agent influencing the chemical structure of the membrane. According to the invention, poly aluminum chloride (PAC) is utilized to effectively reduce low-molecular-weight organic matters inwater, so that the soluble organic matter is transferred to a solid phase; and the PAC and the organic matter adsorbed on the PAC can be well separated from water, so that quality of feed water is ensured.

In a pump apparatus of the present invention, a portion of fluid sent to a fluid-sending destination is circulated to a pumping driving chamber on one side of a cylinder through a circulation passage. The pump apparatus includes a switching valve which switches inflow and outflow of the circulated fluid with respect to the pumping driving chamber. The switching valve is connected to a piston rod through a link mechanism, and mechanically carries out the switching operation using a pumping driving force.

The invention belongs to the field of construction engineering structures, and relates to an assembly type corrugated steel arch-shaped shed-tunnel structure. The structure is characterized in that areinforced concrete foundation is arranged on the lower portion of the structure, and the inner side and the outer side of the reinforced concrete foundation are integrated in a rigid mode; reinforcedconcrete side walls are arranged on the inner side and outer side of the reinforced concrete foundation, an outer reinforced concrete retaining wall is arranged on the outer reinforced concrete sidewall, and a corrugated steel plate arch-shaped ceiling in the axial direction of a tunnel is assembled on the upper end surfaces of the inner and outer reinforced concrete side walls; filler and greening grass are sequentially laid on the arch-shaped outer side of the steel plate arch-shaped ceiling. The structure has the advantages that the ceiling is high in strength and resistant to corrosion;deformation adaptability is high, the construction period is shortened, the construction cost is reduced, operation and maintenance are simple and convenient, and the later maintenance cost is reduced.

The invention provides an automatic guide part conveying device. The automatic guide part conveying device comprises a drive system, an anti-collision system, a power supply system, a frame chassis and a center controller. The operating state of the drive system is controlled through the center controller to guarantee stable operation of the device. The drive system comprises four independent drive units and the drive frame chassis. Motors are arranged in the drive units and can independently finish steering and driving. The drive frame chassis finishes part conveying. The power supply system comprises a battery jar, and power supply is achieved through a battery in the battery jar. The anti-collision system comprises a mechanical anti-collision system. The center controller controls the motors arranged in the driving units to slow down for collision prevention, or the mechanical anti-collision system automatically avoids obstacles. As the automatic guide part conveying device monitors the operating states of the four drive units, information is fed back to the center controller for operation of the device through a feedback system, the operating states are determined through processing, positioning is more accurate, vibration is low, and limitation from regions is avoided.

The invention provides multi-camera assembling equipment which comprises an assembling equipment body. The assembling equipment body comprises a first base table, a rotating disc module, a first feeding module, a second feeding module, a second material part alignment module, a dispensing module and an AA module, and the second material part alignment module, the first feeding module and the dispensing module correspond to one of a plurality of working carrying tables. The second material part alignment module adjusts the posture of a second material part under the cooperation of the AA module, so that the posture of the second material part is aligned with a first material part. According to the equipment, the first material part, namely a main camera is conveyed in a rotating disc mode, operation stations corresponding to the multiple working carrying tables on a rotating disc can be operated in parallel, namely, the multiple operation stations on the rotating disc work at the same time, the phenomenon that the operation stations wait is avoided, and the assembling efficiency is improved; and in addition, the AA module is matched with the second material part alignment module, so that the camera assembly precision is further improved.

The invention belongs to the technical field of hydraulic gates, and particularly relates to a large-size hydraulic gate with an auxiliary function of opening and closing. The large-size hydraulic gate comprises a portal frame, a gate body and a hoist, wherein one end of the hoist is provided with a driving motor, the other end of the hoist is provided with a manual rotation handle, an auxiliary power gear box is arranged between the hoist and the driving motor, one of the sides of the bottom of the portal frame is provided with a horizontally placed U-shaped supporting frame, the U-shaped supporting frame is internally provided with a water wheel, the portion from one of the ends of the water wheel to the exterior of the U-shaped supporting frame is connected with a worm and gear structure, the worm and gear structure is provided with a vertical first driving shaft, the auxiliary power gear box is provided with an active input shaft, an auxiliary power input shaft, a transmission shaft, a one-way transmission gear box and a power output shaft, the active input shaft is connected with the driving motor, the auxiliary power input shaft is connected with the first driving shaft, andthe power output shaft is connected with the hoist. The large-size hydraulic gate has the advantages that the deficiencies in the prior art are overcome, the power consumption is effectively reduced,the energy-saving effect is good.

In a pump apparatus of the present invention, a portion of fluid sent to a fluid-sending destination is circulated to a pumping driving chamber on one side of a cylinder through a circulation passage. The pump apparatus includes a switching valve which switches inflow and outflow of the circulated fluid with respect to the pumping driving chamber. The switching valve is connected to a piston rod through a link mechanism, and mechanically carries out the switching operation using a pumping driving force.

A microvalve having a cast-in-place and lithographically shaped mobile, polymer monolith for fluid flow control in microfluidic devices and method of manufacture. The microvalve contains a porous fluorinated polymer monolithic element whose pores are filled with an electrically insulating, high dielectric strength fluid, typically a perfluorinated liquid. This combination provides a microvalve that combines high dielectric strength with extremely low electrical conductivity. These microvalves have been shown to have resistivities of at least 100 GΩ and are compatible with solvents such as water at a pH between 2.7 and 9.0, 1-1 propanol, acetonitrile, and acetone.

The invention discloses a composite type air cleaner for pipeline descaling. The composite type air cleaner comprises a blade cleaning mechanism and a nozzle. The blade cleaning mechanism and the nozzle are connected into a whole through self-lock threads. The blade cleaning mechanism comprises inner-layer blades and outer-layer blades. The inner-layer blades and the outer-layer blades are staggered and stacked together. The nozzle is composed of an inlet cavity, a cavitation resonant cavity and small jet flow holes. Due to the fact that the cavitation mechanism is adopted for cleaning a pipeline, the cleaning efficiency is much higher compared with traditional cleaning ways. By the adoption of two-stage composition of the blade cavitation cleaner and the cavitation nozzle, the cavitation effect is improved compared with a single-stage cavitation cleaner. By the adoption of the composite type air cleaner, needed driving pressure is lower than 10 MPa, and the risk is lowered compared with traditional high-pressure water jet flow cleaning technology. The cavitation cleaner is simple in structure and low in manufacturing cost, and therefore the needed cost is lower compared with traditional PIG cleaning technology.

The invention discloses a permeable membrane assembly capable of reducing driving pressure. The permeable membrane assembly comprises a permeating liquid center pipe and multiple membrane units, wherein the membrane units are staggered, two adjacent different membrane units constitute one filter bag unit, producing water flow channel cloth is arranged in each filter bag unit and is close to the middles of the two membrane units, three ends of the inner side of each filter bag unit are sealed, the unsealed end of each filter bag unit is mounted on the permeating liquid center pipe, permeable microholes are formed in the permeating liquid center pipe and communicated with unsealed openings of the filter bag units, water inlet flow channel cloth is arranged between two adjacent filter bag units, the permeation pressure is reduced, driving force of membranes is reduced, requirements for pipelines, valves, pumps and membrane housings are reduced, requirements for the anti-compaction performance of the membrane assembly are reduced, pollutant blocking of the membranes and the cleaning recovery difficulty are reduced, safety hazard caused by high driving force is reduced, and energy consumption can also be reduced.

The invention discloses an upper mold trolley, and relates to the technical field of buildings. Wherein the upper mold trolley comprises a bracket; a template assembly which comprises an upper template, a first side template and a second side template; a plurality of driving devices which are arranged on the bracket at intervals and are connected with the template assembly; and multiple distance measuring devices which are arranged on the support or the template assembly at intervals, and the multiple distance measuring devices are electrically connected with the multiple driving devices in a one-to-one correspondence mode. Parameters, such as rotating angles, of the first edge template in the rotating process are measured by the distance measuring devices, and the multiple distance measuring devices detect the rotating angles of different positions of the first edge template and the second edge template. The difference values between the measured corners are compared, and the corresponding driving devices are controlled according to the difference values, so that the synchronism of the first edge template and the second edge template in the driving process can be well ensured, and the deformation of the templates can be reduced.

The invention discloses a polyisocyanate adhesive, and a production method and a production device thereof, and relates to the technical field of adhesives. The polyisocyanate adhesive is prepared from, by weight, 8 to 12 parts of polyphenyl polymethylene polyisocyanate, 27 to 33 parts of diisocyanate, 12 to 18 parts of hexamethylene diisocyanate, 6.5 to 8.5 parts of terpene resin, 22 to 28 parts of ethyl acetate, 20 to 25 parts of methyl acetate and 11.5 to 15.5 parts of propylene glycol methyl ether acetate. The environment-friendly solvent is used for replacing chlorobenzene and the isocyanate is used for replacing a high-toxicity raw material TDI, so that the odor and toxicity of the glue are reduced, the elongation at break, the tensile strength and the bending strength of the polyisocyanate glue are improved, and related technical requirements and safety performance of the high-speed rail industry are met.

The invention discloses a photonic crystal optical fiber methane sensing device based on modular interference. The device is composed of a broadband light source, an optical circulator, a photonic crystal optical fiber methane sensor cladding an air hole coated polymer sensitive film, a testing air chamber, a switching valve, a quality flow controller, a spectrum analyzer and a computer, wherein the optical fiber methane sensor consists of a single mode fiber, a photonic crystal optical fiber and a welding area of the two fibers; the adopted photonic crystal optical fiber refers to an endless single mode solid core photonic crystal optical fiber; the polymer sensitive film refers to a polycarbonate resin methane sensitive film containing a cage molecule E-(OC2H5)6, and the inner wall of the cladding air hole of the photonic crystal optical fiber is coated with the film by virtue of an air pressure driving device; when the to-be-tested methane gas acts with the sensitive film on the inner wall of the cladding air hole of the photonic crystal optical fiber, the refractive index of the sensitive film changes, the reflection interference spectrum characteristic wavelength of the sensor is moved, the average movement amount shown in the description of the reflection interference spectrum characteristic wavelength before and after contacting the sensor with the methane gas is analyzed, so that the concentration of the to-be-tested methane gas can be obtained. The device disclosed by the invention has the characteristics of high sensitivity, high stability, high selectivity and the like.

The present invention relates to a piezoelectric structure, a method of fabricating the same, and a pressure sensor using the same. A piezoelectric structure comprises perovskite structure layers including a material having an ABO3 perovskite structure and an interlayer including a metal oxide A*O interposed between the perovskite structure layers. A or A* is one of an alkaline earth metal element, an alkali metal element, a lanthanum group element, and a post-transition metal element, B is a transition metal element, and O is an oxygen element.

The invention belongs to the field of water treatment. A water treatment system comprises a liquid inlet pipe to be treated, a concentrated liquid outlet pipe and at least one circulation assembly. A return pipeline is connected between the liquid inlet pipe to be treated and the concentrated liquid outlet pipe. The circulation assembly includes a liquid inlet pipe and a liquid outlet pipe communicated with the return line, a membrane module is arranged between the liquid inlet pipe and the liquid outlet pipe, and the inner cavity of the water production pipe of the membrane module includes a brine channel and a Mixed solution channel, the two ends of the water production pipe are respectively provided with a first port and a second port, one of the first port and the second port is used to inject brine into the brine channel, and the other is used to export the mixed solution in the mixed solution channel, water The treatment system also includes a switching mechanism, which is used to switch the liquid flow direction between the first port and the second port. The invention increases the flow rate of the liquid, and the positions of the brine channel and the mixed liquid channel are switched to each other, which improves the anti-fouling and clogging of the membrane module. performance.

The invention relates to a preparation method of a high-flux and low-pressure reverse osmosis membrane, and belongs to the technical field of separation membrane materials. In this method, a layer of nanoparticles is first constructed as an intermediate layer on the surface of the base film, and a transition layer with high porosity is constructed by the nanoparticles, and then a selective separation layer is prepared on the surface of the transition layer by the method of interfacial polymerization. With the high hydrophilicity and porosity of the nanoparticles, the permeation channel of water can be formed better, and the high-flux reverse osmosis process under the driving condition of low pressure can be realized.

The invention discloses a compound absorption refrigeration unit. The compound absorption refrigeration unit comprises at least two module units, wherein each module unit comprises a low-pressure generator, a high-pressure generator, a hot water generator, an absorber and an evaporator, and each module unit can be configured to have the following working modes: a double-effect working mode that high-quality heat sources carry out heat exchange, a single-effect working mode that waste heat water carries out heat exchange, and a single-double-effect working mode that two heat sources carry out heat exchange simultaneously; and in this way, the different module units in a whole unit can be configured to have different working modes according to the different types and the different heat exchange amounts of the drive heat sources, so that the maximum recovery for waste heat under many conditions that waste heat water is insufficient or the high-grade heat sources are not supplemented or replaced in time can be met, and the maximum refrigeration capacity need is met. Moreover, an outlet concentration of each absorber can be reduced by virtue of the cycle of two or more module units, then a steam drive pressure is reduced, and a smoke discharge temperature of a natural gas outlet or a smoke outlet can be reduced, so that the effects of energy saving and effect improvement are acted.

The invention provides a kind of mini-type jet pump and its preparation method. The pump body includes drive structure and suck structure. The drive structure is made up of ejector nozzle, drive chamber connected to the ejector nozzle; the drive chamber is installed drive liquid inlet hole. The suck structure includes suck entrance end, suck interval channel, and diffusion exit. The ejector nozzle is installed at the diffusion exit; the suck interval channel is installed at the both sides of the ejector nozzle. The high pressure driving gas or liquid is entranced into drive chamber by the drive liquid inlet hole, and jetted with high speed at the exit of the ejector nozzle; as well as, the vortex is appeared at its boundary, the liquid in the suck interval channel is sucked by the vortex scroll to jet; the mixed liquid with the two different flow rate mixed liquid are both flowed into the diffusion exit. The preparation of the mini-type jet pump adopts MEMS technology design to realize by two piece photo etching plate; the selection range of the pump body material is large; and it is easy to integrate with most micro flow system.

The invention discloses a linkage control method for water source wells and a water supply and injection station of an oil field. The method comprises the following steps that 1, the first water source well is started to supply water to a water storage tank; 2, the second water source well is additionally arranged to supply water to the water storage tank; and 3, the liquid level change of the water storage tank is monitored in real time to increase or decrease water supply of the water source wells. According to the linkage control method, air in a pipe is discharged in advance through an emptying electromagnetic valve on an emptying pipe, and the problem that the back pressure of well mouths of the water source wells is large, and the starting current is too large when an electric submersible pump is started, so that the electric submersible pump cannot be started is solved; the electric submersible pump is controlled through a frequency converter, and thus electricity and energy aresaved; an inclined connecting water pipe and a check valve are matched to accumulate water flow, the air in the pipe is squeezed out, and the pressure in the pipe is reduced; and a three-phase electric parameter acquisition module is used for detecting the fault of the electric submersible pump, a plurality of water source well control units work cooperatively in a linkage mode according to the water level in the water storage tank, and thus the efficiency is high.

The invention relates to a powder molding process, in particular to a multisource dynamic pressure isopressing powder molding process. In the invention, the problems of excessive driving pressure and expansive cost in the existing isostatic pressing technology can be solved. The multisource dynamic pressure isopressing powder molding process comprises the following steps of: (1) sleeving a bag filled with powder in a work cylinder cavity of an isostatic press; (2) sealing the work cylinder cavity; (3) charging a working solution in the work cylinder cavity through each solution inlet to stably rise pressure; (4) charging the working solution in the work cylinder cavity through each solution inlet to pressurize; (5) stably releasing the pressure and taking out the molded powder. By using the multisource dynamic pressure isopressing powder molding process, the problems of excessive driving pressure and expansive cost in the existing isostatic pressing technology can be solved effectively, the process is not only suitable for a wet bag isopressing, but also suitable for a dry bag isopressing.

According to the electric commercial vehicle rear auxiliary box gear shifting executing mechanism, a direct-current brushless motor drives a lead screw to rotate, a lead screw nut drives a gear shifting fork shaft to transversely move, a lever structure drives a gear shifting fork, and therefore a high-gear and low-gear sliding sleeve is driven to move towards a high-gear conical hub or a low-gear conical hub; the high-gear synchronizing ring and the low-gear synchronizing ring are circumferentially bounced off by a certain angle under the action of elastic force of a spring, and gear teeth are always staggered by half of teeth, so that when the synchronizing ring on one side is meshed with the gear teeth of the high-low-gear sliding sleeve, the conical surface of the gear teeth of the synchronizing ring on the other side is opposite to the conical surface of the gear teeth of the high-low-gear sliding sleeve. The gear shifting device has the advantages of increasing gear shifting force, being simple and efficient and being accurate and rapid in gear shifting.

The present invention relates to a quinoline material containing a benzofuran structure. The structure of the material is shown in the general formula I: in the general formula I, Ar is selected from hydrogen, halogen atoms, substituted or unsubstituted C6-60 aryl, substituted or unsubstituted 5-60-membered heteroaryl containing one or more heteroatoms, where the heteroatoms are nitrogen, oxygen or sulfur. The quinoline materials containing benzofuran structure are applied to light-emitting layer materials, electron transport layer materials and hole transport layer materials in OLED devices. The quinoline material containing benzofuran structure is used as the main material for color development. Quinoline materials containing benzofuran structure show excellent performance in OLED devices, which can reduce driving pressure, improve current luminous efficiency and prolong working life.