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

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.

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 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 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.