15results about How to "Avoid pressure drop" patented technology

The invention discloses a thin-layer high-density filler which is prepared by combining an optimized weaving method, weaving density and a bundling mode on the basis of a plain woven wire mesh filler. The novel weaving method enables the weft number of the thin-layer high-density filler to be larger than that of plain woven wire mesh filler under the condition of the same warp number, and the thin-layer high-density filler has the characteristics of high specific surface area, high mass transfer efficiency, low flow pressure drop and the like. A large number of micropores exist on the surface of the thin-layer high-density filler, the wettability is extremely good, the transverse diffusion effect of liquid in the filler can be greatly enhanced due to the fact that the weft density is large, the performance is particularly outstanding in the processes of large-spraying-density rectification and the like, and the pressure drop is about 30%-50% lower than that of a common plain woven filler. The filler provided by the invention mostly adopts stainless steel wires as raw materials, and has the advantages of low cost, large flux, stable performance and low metal exudation rate, so that the filler is difficult to replace in the field of heat pump rectification, high-purity electronic chemical separation, intermediate separation and isomerism separation production.

The gas-liquid separator comprises a shell, a flow separation cylinder and a partition plate, and a feeding pipe, an exhaust pipe and a liquid drainage pipe are arranged on the shell; the flow separation barrel is arranged in the shell and is provided with a feeding section, a first separation section, a second separation section and a discharging section which are sequentially arranged in the axial direction, and the feeding section is communicated between the feeding pipe and the first separation section; the first separation section comprises a plurality of spiral arm channels which are distributed at intervals in the circumferential direction and communicate with the shell, the multiple spiral arm channels communicate with the flow separation barrel in the tangential direction, and the second separation section comprises a plurality of flow guide channels which are distributed at intervals in the circumferential direction, extend in the axial direction and communicate with the shell and the first separation section; and the plurality of flow guide channels are tangentially communicated with the flow separation cylinder. According to the gas-liquid separator, the feeding pipe and the flow separation barrel with multiple separation functions are sequentially combined, the gas-liquid separator has the advantages of being light and simple in equipment structure, wide in medium material separation applicability and capable of stably running for a long time, and the problems of blow-by and backmixing of a discharging opening and the like can be effectively solved.

The invention provides a wine brewing wastewater treatment device, and belongs to the technical field of wine brewing wastewater mushroom dregs. Comprising a fermentation reaction bin, the top of the fermentation reaction bin is provided with a feeding pipe bin, one side of the feeding pipe bin is provided with an auxiliary agent bin, the top of the fermentation reaction bin is provided with a biological agent bin, and the side of the fermentation reaction bin is provided with a control center. By arranging the sprinkling adjusting assembly and the stirring and mixing assembly, a microbial agent and an auxiliary agent are fully contacted and mixed, the activity of the microbial agent is improved, the degradation process of the fermented glutinous rice wastewater is accelerated, the treatment efficiency is improved, meanwhile, the microbial agent is more uniformly distributed in the fermented glutinous rice wastewater through stirring, the consistent reaction effect of each area is ensured, and the treatment effect is improved. The phenomenon of insufficient local treatment is avoided, blockage is avoided, it is guaranteed that the microbial inoculum content concentration and the fermentation speed of all areas are equal, damage caused by device pressure drop during blockage is avoided, the service life of equipment is prolonged, and the production cost is reduced.

The invention relates to the technical field of top-mounted ball valves, and discloses a top-mounted ball valve convenient for accessory replacement, which comprises a ball valve body, one end of the ball valve body is fixedly connected with a connecting pipe, the bottom of the connecting pipe is fixedly connected with a collecting box, the collecting box is internally provided with a collecting groove, and the inner wall of the connecting pipe is provided with a falling groove communicated with the collecting groove. The inner wall of the connecting pipe is fixedly connected with a fixed filter plate, and one side of the fixed filter plate is connected with a filter plate. According to the top-mounted ball valve with the accessories convenient to replace, the fixed filter plate and the filter plate are matched with each other, so that liquid entering the top-mounted ball valve is filtered, the cleanliness of the liquid is enhanced, and the abrasion risk caused by impurity erosion of a ball body and a cavity in the ball valve body is reduced; in addition, damage to the sealing face of the valve seat caused by impurity accumulation is effectively reduced, the service life of the top entry type ball valve is prolonged, and the problems of leakage, jamming or failure of the ball valve are avoided.

The utility model relates to radio frequency power amplifier technical field, concretely relates to a radio frequency power amplifier power supply circuit with bidirectional current drive, including two -way negative voltage protection circuit, second circuit, third circuit, fourth circuit, fifth circuit and sixth circuit, two -way negative voltage protection circuit is used for monitoring main road grid negative voltage Vgs main and peak value grid negative voltage Vgs peak, and is turned off drain electrode power VDS when any road negative voltage loss, second circuit is used for 50V direct current voltage to 12V, third circuit is used for 12V direct current voltage to 5V, fourth circuit is used for direct current 5V conversion direct current 5V, fifth circuit is used for direct current 5V conversion direct current 5.8V, sixth circuit is used for direct current 5V to direct current 2.5V, and increases bidirectional current drive ability, and the power supply of main road grid negative voltage Vgs main. The problem that the existing DC / DC negative voltage chip negative voltage adjustment is complex, current carrying capacity is insufficient and lacks bidirectional current drive ability has been solved.

The present application discloses a digital isolator with improved common-mode transient immunity, which relates to the field of integrated circuit isolation technology, and includes a pair of transceiver chips, wherein each transceiver chip has the same structure, and the transceiver chip includes a transmitting module and a receiving module; a digital control module is used to control one of the pair of transceiver chips to be in a transmitting mode, while the other is in a receiving mode. Connecting two identical transceiver modules together can realize multi-channel signal transmission in any direction. In addition, an envelope detection module, a CMTI enhancement module, and a noise elimination module are also disclosed, which are used to improve the common-mode transient immunity of the digital isolator and solve the problem that the transmission signal is easily affected by noise due to large attenuation.

The application discloses a battery protection board, a battery system and a mobile device. The battery protection board comprises a power meter chip, a current sampling circuit and a first protection circuit. The first end and the second end of the power meter chip are connected with the positive electrode and the negative electrode of a battery pack respectively. The power meter chip is used for measuring the actual voltage of the battery pack. The current sampling circuit is used for collecting the charging current of the battery pack and feeding back to the power meter chip. The first protection circuit is used for protecting the battery pack according to the actual voltage and the charging current of the battery pack. The power meter chip is used for sending the actual voltage of the battery pack and the charging current of the battery pack to a mainboard system, so that the mainboard system charges the battery pack according to the actual voltage and the charging current of the battery pack. The actual voltage of the battery pack can be measured more accurately. Since the mainboard system controls the charging current according to the difference between the actual output voltage of the charging chip and the actual voltage of the battery pack, the charging efficiency is high when the charging current is large.

The present invention discloses a rectifier system for an aviation brushless three-level excitation generator, comprising a plurality of mounting platforms, a plurality of rectifiers, a positive electrode bus ring, a negative electrode bus ring, a wire, a terminal block and a wind hood, wherein the plurality of mounting platforms are arranged in a ring shape and are arranged on the outer shell of the generator, a plurality of rectifiers are mounted on the mounting platforms and are supported overhead by the mounting platforms, a positive electrode bus ring is connected to the positive electrodes of the plurality of rectifiers, a plurality of negative electrode bus rings are connected to the negative electrodes of the plurality of rectifiers, a terminal block is arranged on the generator, a terminal block is provided on the terminal block, one end of the wire is connected to the positive electrode bus ring and the negative electrode bus ring, and the other end is connected to the terminal block, a wind hood is installed on the outer shell of the generator and covers the plurality of rectifiers, a cooling air inlet is arranged on one side of the wind hood, and a plurality of guide plates for guiding the wind direction are arranged on the inner wall of the wind hood. The present invention also discloses a generator. Compared with the prior art, the present invention greatly reduces the volume space occupied by the rectifier and has a good heat dissipation capacity.

This invention provides a remote voltage sampling compensation charging pile in the field of charging pile technology, including a charging cabinet and at least one charging gun; the charging cabinet includes a power module, a charger controller, a voltage and current sampling module, a resistor R1, a switch K3, and a switch K4; one end of the power module is connected to switches K3 and K4, and the other end is connected to the voltage and current sampling module; the charging gun is connected to the charger controller, the voltage and current sampling module, and switches K3 and K4 respectively; the resistor R1 is connected to the charger controller and the charging gun; the charger controller is connected to the voltage and current sampling module, switches K3 and K4 respectively. The advantages of this invention are: it greatly improves the voltage sampling accuracy and realizes compensation for the output voltage of the charging gun.

The utility model discloses a direct-acting type oil supplementing overflow valve which comprises an overflow valve body and a valve body, the whole overflow valve body is arranged in the valve body, the overflow valve body comprises a valve element, a valve seat and a pressure adjusting screw are arranged on the valve element, a pressure adjusting spring is arranged between the valve seat and the pressure adjusting screw, a gasket and an elastic check ring for a hole are arranged at the right end in the valve body, and the valve element is arranged in the valve body. A conical spring is arranged between the pressure adjusting screw and the gasket. The overflow valve as a whole forms the one-way oil supplementing valve together with the valve body, the conical spring, the gasket, the O-shaped ring and the circlip for the hole, when the pressure of the P port is reduced to zero and reverse air suction is generated, under the action of atmospheric pressure, the overflow valve is pushed away as a whole to compress the conical spring to realize reverse oil supplementing from the T port to the P port, and the air suction phenomenon of a hydraulic system can be effectively avoided.

The application provides a synchronous rectification Vcc power supply method and a power supply circuit, and aims at solving the technical problem that the existing synchronous rectification Vcc power supply circuit using a diode to prevent current backflow will generate a diode voltage drop, and thus lead to a VCC port voltage drop and an under-voltage lock state. The synchronous rectification Vcc power supply method is as follows: a backflow prevention unit composed of a MOS tube P1 and a MOS tube P2 is arranged between a VD port and a VCC port, the conduction or turn-off of the power supply circuit is controlled according to the comparison results of a VCC port voltage Vcc and a starting voltage vth1 or an under-voltage protection threshold vth2, the comparison result of the VCC port voltage Vcc and a sampling voltage vdla, and the comparison result of the VCC port voltage Vcc and a VCC port reference voltage Vref; when the VD port voltage is less than the VCC port voltage, the gates of the MOS tube P1 and the MOS tube P2 are connected to Vcc to form an equivalent diode, so as to prevent the VCC port from being discharged reversely; and when the VD port voltage is greater than the VCC port voltage, the VCC port is charged through the equivalent diode, so as to avoid the appearance of a diode voltage drop.

The application provides an oxygenator, comprising a shell and a pre-module arranged in the shell. The pre-module comprises a plurality of pre-units arranged in layers, and each pre-unit comprises three membrane filament layers arranged in layers, and the three membrane filament layers are arranged at an angle of 120 degrees between each other. The three membrane filament layers comprise one first pre-membrane filament layer and two second pre-membrane filament layers, the first pre-membrane filament layer is one of an oxygenation membrane filament layer and a temperature control membrane filament layer, and the second pre-membrane filament layer is the other of the oxygenation membrane filament layer and the temperature control membrane filament layer. In all pre-units, the arrangement angle of the first pre-membrane filament layer is the same. The pre-module forms a uniform blood passage, improves the uniformity of blood distribution, avoids a large pressure drop of blood in the blood passage, thereby reduces thrombosis, and is beneficial to exerting the best oxygenation efficiency of the oxygenator.

The utility model discloses an all-wheel-drive control circuit of a multi-rotor unmanned aerial vehicle and the multi-rotor unmanned aerial vehicle, which are applied to the technical field of unmanned aerial vehicle devices and are used for solving the problems of poor stability and reliability of a control circuit of the multi-rotor unmanned aerial vehicle in the prior art. Specifically, the main control circuit board and the power distribution driving circuit board are physically separated and are connected through a first connector; a plurality of mutually independent motor driving channels are arranged on the power distribution driving circuit board; the main control circuit board generates a plurality of power supply channel control signals and sends the signals to the motor driving channel through the first connector; and each motor driving channel connects or disconnects the connection between the corresponding motor and the external power supply under the control of the power supply channel control signal. Through physical separation of the circuit board and independent on-off control of the motor driving channel, the stability and reliability of the control circuit are improved.

This invention discloses a thermometer fixture suitable for transient processes in cryogenic systems, comprising a front guide tube, a rear guide tube, and a temperature measuring block with a temperature sensor mounting interface. The first end of the front guide tube and the first end of the rear guide tube are respectively connected to process piping, and the second ends of the front guide tube and the rear guide tube are respectively connected to the temperature measuring block. A heat exchange channel is formed inside the temperature measuring block, which communicates with the internal channels of the front and rear guide tubes to form a through-flow fluid channel. The fluid being measured can flow through the heat exchange channel and exchange heat with the temperature measuring block. This invention employs a through-flow structural design, combined with a temperature measuring block made of high thermal conductivity material and an optimized flow channel structure, significantly reducing the thermal inertia and thermal resistance of the temperature measuring system and improving the transient thermal response speed. It is particularly suitable for temperature measurement in cryogenic transient conditions such as superconducting cryogenic systems and modular hydrogen liquefaction equipment in the 20–30 K temperature range.

The utility model discloses an energy-saving efficient jet tray which comprises a lower tray and an upper tray, a plurality of lower sieve holes are formed in the lower tray, a plurality of upper sieve holes opposite to the lower sieve holes are formed in the upper tray, and trumpet hoppers are fixed between the lower sieve holes and the corresponding upper sieve holes. The middle of the lower tower plate and the middle of the upper tower plate jointly penetrate through and are rotationally connected with a vertical shaft through a bearing, extrusion assemblies are fixed to the surfaces of the bottom end and the top end of the vertical shaft correspondingly, each extrusion assembly comprises an end plate and a sliding sleeve, and cleaning assemblies are fixed to the outer side walls of the two sliding sleeves correspondingly. According to the utility model, the lower tower plate, the upper tower plate and the mounting plate are arranged, and the horn hopper is fixedly connected between the lower sieve pores of the lower tower plate and the upper sieve pores of the upper tower plate, so that the sieve pores are gradually expanded from bottom to top, and airflow flows upwards to pass through the lower sieve pores with smaller pore diameters and then pass through the upper sieve pores, so that the gas phase pressure drop in the tower body can be reduced, and the gas-liquid contact efficiency is improved; therefore, the energy consumption of the sieve-plate tower is reduced.