91results about How to "Increase delivery pressure" patented technology

Patient interfaces for respiratory therapy in the form of nasal interfaces or nasal masks include features that enhance or provide lateral stability of the interface. At least some of the embodiments provide multiple facial contact points or areas located in the general areas of the user's cheeks and/or upper lip. Some embodiments of the nasal interfaces provide advantageous sealing characteristics. The nasal interfaces may provide a controlled expiratory flow to reduce noise. Some embodiments include nasal pillows instead of or in addition to nasal prongs. The nasal pillows can have exhaust vents or can change in length in response to a pressure level within the nasal pillow.

A refillable fluid container system having a pressure control architecture in which persistent air bubbles are released from a capillary or foam fluid reservoir and are directed from an optical level sensing system in a liquid fluid reservoir.

The invention relates to a powder conveying device. The device is composed of a powder storage system A, a powder pressing and conveying system B, a powder flow monitoring and adjusting system C, a powder weighing system D and a powder recycling system E; the power firstly enters the powder storage system A, and then enters the powder pressing and conveying system B under the effect of gravity and negative pressure of a pressurizer; after the powder flow monitoring and adjusting system C performs flow control, the powder is discharged in a continuous manner; when a constant-flow state is established or a verification coefficient of a measurement instrument is obtained before driving, the pressurized powder discharged from the powder flow monitoring and adjusting system C enters the powderweighing system D through valve switch, and the powder weighing system D weighs and computes the verification coefficient of the powder flow measurement instrument; and then the powder is depressurized by the powder recycling system E and returns to the powder storage system to be recycled. The device has a simple structure and a large flow adjusting range, requires small investment, is continuous and stable in operation, saves energy and is environmentally-friendly. Therefore, the powder conveying device provided by the invention has strong adaptability and a remarkably wide application prospect.

The invention belongs to the technical field of spraying machinery, and particularly relates to an external soil spraying machine and a special two-stage energy-saving high-lift underflow pump for the external soil spraying machine. The underflow pump comprises a transmission shaft, a pump body, a bearing chamber and a coupling, wherein the pump body comprises a one-stage pump body, a two-stage pump body and a two-stage feed pump body; a one-stage impeller is fixedly mounted at the right end of the transmission shaft in a sleeving manner; an elbow is communicated between the one-stage pump body and the two-stage feed pump body; a guard plate is arranged between the two-stage feed pump body and the two-stage pump body; a locating sleeve is mounted on the transmission shaft between the two-stage feed pump body and the two-stage pump body in a sleeving manner; a two-stage impeller is mounted on the locating sleeve in a sleeving manner, and mounted between a radial flange at one end of the locating sleeve and the guard plate; a feed channel is formed between the guard plate and the locating sleeve; the one-stage impeller and the two-stage impeller are mounted back to back; the bending direction of a helical blade of the one-stage impeller is counterclockwise; the bending direction of a helical blade of the two-stage impeller is clockwise; a horizontal feed port is formed in the right end face of the one-stage pump body; and a discharge port is formed vertically in a tangential direction of the pump body on the front side of the two-stage pump body. The underflow pump is higher in lift, and is suitable for conveying viscous slurry; the structure of the spraying machine is simplified; the manufacturing cost and engineering use cost of the spraying machine are lowered; breakdown maintenance points of the spraying machine are decreased; and the power loss of equipment is reduced.

The invention discloses an automatic irrigation system and method used for wild rice stem planting. The system comprises a box body, a solar power generation device, an irrigation mechanism and pesticide spraying mechanisms. A control box is arranged in the box body, a waterproof plate is arranged in the control box, a control system is arranged above the waterproof plate, and a water diversion mechanism is arranged below the waterproof plate and comprises a water divider and a water intake pipe. Irrigation devices are arranged on the two sides of the box body, the pesticide spraying mechanisms are also arranged on the two sides of the box body, the irrigation devices comprise water diversion pipes, water conveying pipes and water penetration pipes, a horizontal guide pipe is arranged between the two water conveying pipes on the same side of the box, and the pesticide spraying mechanisms are arranged on the horizontal guide pipes. The automatic irrigation method comprises the steps of ridge reinforcing construction, construction of the box body and the generation device, construction of the irrigation mechanism, installation of the pesticide spraying mechanisms, trial operation of the automatic irrigation system and equipment maintenance. By means of the irrigation method, water is convenient and efficient to take, the irrigation cost is reduced, use and maintenance are convenient, meanwhile, automatic control can be achieved, and the labor intensity of manual operation is reduced.

The invention relates to a multifunctional remote control automatic plastering machine, comprising a hydraulic conveyor, a plastering device, a flexible lifting track, a rotating chassis, a rack, a travelling track and a remote controller. The multifunctional remote control automatic plastering machine is characterized in that the rack and the flexible lifting track are arranged on the rotating chassis, a big gear wheel and a sliding base plate are arranged below the rotating chassis, the sliding base plate is placed into a lateral track, the lateral track is placed into a longitudinal track, the rack is provided with the hydraulic conveyor, a fixed plate of the plastering device is provided with a steering motor, a turbine worm and a telescopic arm, the telescopic arm is connected with a plastering head, the plastering head is provided with two rotating millstones, and the plastering device is placed into the flexible lifting track. Compared with the prior art, the multifunctional remote control automatic plastering machine disclosed by the invention has the advantages of compact structure, fast mounting adjustment, flexibility in operation, good quality and high working efficiency.

The invention discloses an X120 high grade pipeline steel. The X120 high grade pipeline steel comprises the following components in percentages by weight: 0.04-0.06% of C, 0.20-0.30% of Si, 1.80-2.00% of Mn, less than or equal to 0.015% of P, less than or equal to 0.005% of S, 0.075-0.090% of Nb, less than or equal to 0.030% of V, 0.010-0.020% of Ti, less than or equal to 0.050% of Al, 0.25-0.35% of Cr, 0.25-0.35% of Mo, 0.30-0.40% of Ni, 0.25-0.35% of Cu, 0.0008-0.015% of B, less than or equal to 80 ppm of N, 0.15-0.25% of Pcm and the balance of Fe and impurities. The invention further discloses a preparation method of the X120 high grade pipeline steel. A steel plate produced from the X120 high grade pipeline steel has the advantages of high strength, high toughness and low yield ratio.

The invention provides pulping equipment based on air blasting energy and with a secondary repulping function. The pulping equipment mainly comprises a coarse pulp generating device, a bubble generating device, a bubble heating device and a fine pulp generating device. The pulping equipment is characterized in that air blasting energy is used for repulping and secondary fine repulping. Repulping through the air blasting energy is achieved through the bubble generating device and the bubble heating device; multi-area blasting repulping is achieved through upper and lower exhaust rings; scallop tubes are used for guiding bubble diversion, so that the upper and lower exhaust rings are protected; Y-shaped filters are used for screening and filtering crushed materials; the coarse pulp generating device is used for generating coarse pulp; and the fine pulp generating device is used for achieving fine repulping.

The present invention relates to a piston pump (10) form high-pressure transmission of a fluid to be transmitted. The piston pump (10) comprises a pressure generating unit (30) and a control unit (40) which are arranged together in an individual housing (84) and aligned to each other along a common longitudinal axis (18).

The invention discloses a wide head rotor of a high vacuum displacement pump. In an existing cam pump technology, seal between a pump body and a rotor is linear pump, and therefore, vacuum capacity is easily caused to drop after the rotor and the pump body are worn. The end surface of the wide head rotor of the high vacuum displacement pump is of an axisymmetric structure, and a 1/4 molded line of the end surface consists of three parts: a top end wide head circular arc AB, a transition curve BD and an intermediate circular arc DE, and the rotor is formed by wrapping a metal framework and rubber; and the top end wide head circular arc AB and the intermediate circular arc DE of the wide head rotor are two conjugate curves. The wide head rotor effectively increases a working pressure range of the high vacuum displacement pump, ensures lasting stability of conveying pressure, reduces pulsation and improves working efficiency.

The invention provides a low-energy-consumption high-pressure powder conveying device. A low-pressure conveying air inlet is formed in the bottom of a lifting pipe. A powder inlet is formed in the lower portion of the lifting pipe. The top of the lifting pipe is connected with a feeding bin through a quick separator. The low-pressure conveying air inlet in the bottom of the lifting pipe is connected with a fan. The powder inlet in the lower portion of the lifting pipe is connected with a crusher through a feeder. A gas outlet in the top of the feeding bin is provided with a gas-solid separator. A feed leg of the gas-solid separator is returned back to the lower middle portion of the feeding bin. One to twelve conical hoppers are arranged at the bottom of the feeding bin. Air inlets are formed in the side walls of the upper portions of the conical hoppers. A fluidization gas chamber is arranged from the middles of the conical hoppers to the bottom of the feeding bin and connected with the fan through a bypass. The feed leg of each conical hopper is connected with an irregularly-shaped hole in an upper fixing valve plate of a powder conveying pump through a valve. A lower stock bin connected with an irregularly-shaped hole in a lower fixing valve plate of the powder conveying pump passes through a check valve and the valve in sequence to be connected with a high-pressure injection pump.

The invention discloses a high-viscosity polyamide-6 preparation method. According to the present invention, the polyamide-6 is tackified by using the following methods that the tri-amino end-cappingagent is added to increase the amino terminal content, the conveying pressure between the front polymerization pipe and the rear polymerization pipe is increased, the flat wet slices are obtained through slicing, the solid phase condensation polymerization efficiency in the second-stage drying is improved, and the energy loss is reduced.

The invention provides a non-uniformity correction method based on scene adaptation and a hardware implementation device thereof, and the method comprises the steps: collecting an original infrared image, obtaining pixel data, and carrying out the statistics of the number of frames; initializing correction parameters of the original infrared image to obtain an initial gain correction coefficient and an initial offset correction coefficient; entering an initial correction mode, and determining a current correction mode, carrying out non-uniform correction frame by frame according to the frame number, judging whether an initial gain correction coefficient and an initial offset correction coefficient are updated or not; when it is judged that updating is not carried out, obtaining corrected pixel data, and when it is judged that updating is carried out, obtaining updated correction parameters and corrected pixel data, wherein the corrected pixel data are corrected infrared images; cachingthe corrected infrared image and the updated correction parameters, and storing the infrared image and the updated correction parameters in an external data storage module. The device comprises an input cache module, a non-uniformity correction module, an offset accumulation calculation module, a parameter updating module, an output cache module and an external data storage module.

The invention discloses a new structure multifunctional composite pumping device. The new structure multifunctional composite pumping device comprises a transmission device, a conveying device and anauxiliary device. The transmission device is mainly composed of a driving shaft and a driven shaft which are in a pair, the installing direction of the driving shaft is perpendicular to the installingdirection of the driven shaft, and torque is transmitted between the driving shaft and the driven shaft through a pair of bevel gears. The two bevel gears are arranged on the driving shaft and the driven shaft correspondingly. The conveying device is mainly composed of two impellers and two volutes. The two impellers are arranged at the two ends of the driven shaft correspondingly and matched with the two volutes correspondingly. The auxiliary device is mainly composed of a bridge frame, bearings and sealing covers. The driving shaft and the driven shaft are arranged in the bridge frame through the bearings. Due to lubricating oil in the bridge frame, the lubricating function is ensured. Due to the sealing covers at the upper portion and the front portion of the bridge frame, it is ensured that lubricating oil does not leak. The bridge frame and the two volutes are connected into a whole through bolts. The new structure multifunctional composite pumping device is simple in structure,small in size and capable of automatically balancing the axial force of the impellers; the conveying amount is increased; and different media can be conveyed and mixed.

The invention discloses a multi-type spray head replaceable biological 3D printing device. The multi-type spray head replaceable biological 3D printing device comprises a conveying pipe and a nozzle assembly, wherein the conveying pipe is arranged over a 3D printing platform and comprises a barrel body, a shaft, a motor driving the shaft to rotate, at least two first pressurizing conveying sections, and a pair of pressurizing conveying stirring blades; the nozzle assembly is detachably arranged on the spherical surface of a spherical crown shaped sealing head and comprises a spherical crown shaped supporting shell, an annular slide groove, a pair of arc-shaped slide grooves arranged in a crossed mode, a plurality of arc-shaped plate bodies and a plurality of nozzles. The multi-type spray head replaceable biological 3D printing device can uniformly and smoothly spray biological interstitial fluid high in viscosity and density, and meets the printing requirements of biomedical products.

The invention discloses a sludge thickening and dewatering all-in-one machine. The invention belongs to the technical field of environmental protection. The sludge thickening and dewatering all-in-onemachine includes a housing, wherein two first transmission rollers are arranged in the shell; two second transmission rollers are arranged above the first transmission roller; a first conveying beltis connected between the two first transmission rollers; a second conveying belt is connected between the two second transmission rollers; a plurality of pressing blocks are arranged on the second conveying belt; a plurality of pressing grooves are formed in the first conveying belt; a plurality of round holes are formed in the pressing groove, the round holes are covered with filter cloth, a sludge collecting groove is formed below the first conveying belt, two sludge pressing pipes are arranged in the sludge collecting groove, sludge pressing screw rods are arranged in the sludge pressing pipes, two sludge pressing motors are arranged at the upper end of the shell, and power output shafts of the sludge pressing motors are fixedly connected with the upper ends of the sludge pressing screwrods. Sludge in the pressing groove is subjected to pressure filtration step by step through the pressing block and then concentrated through the concentration device, and therefore the purposes of integrating sludge treatment and improving the treatment efficiency are achieved.

The invention relates to a high-pressure resistant oil and gas pipeline, which comprises a steel pipe. A steel ring is coaxially and fixedly arranged at two ends of the steel pipe respectively, a steel bar framework is coaxially and fixedly arranged between the two steel rings, concrete is coaxially and fixedly arranged on the outer wall of the steel pipe, a prestressed steel wire is wound on the outer wall of the concrete, and protective layers are fixedly arranged on the outer wall of the concrete and the outer wall of the prestressed steel wire. The high-pressure resistant oil and gas pipeline has simple integral structure and scientific and reasonable design, effectively reduces the consumption of steels, reduces the production cost, prolongs the service life, and has simple process and good corrosion resistance.

The invention discloses a preparation method of oxidized graphene modified polyamide-6. The preparation method comprises following steps: 1, raw material preparation; 2, pre-polymerization; 3, post-polymerization; 4, slicing; 5, extracting; and 6, drying cooling packaging. According to the preparation method, a composite component containing silicon, calcium ions, and sodium ions is introduced, sothat product flow performance is improved.