64results about How to "Flow state is stable" patented technology

The invention discloses a backheating method and a backheating structure for a heat pump air conditioner, which can improve the performance of the air conditioner. The backheating structure comprises heat exchangers A and B, a compressor, and a throttling element connected between the heat exchangers A and B, wherein the heat exchanger B is connected with the compressor by an air suction pipe of the compressor; and a higher-temperature coolant in the throttling element performs heat exchange with a lower-temperature coolant in the air suction pipe of the compressor. In the backheating method and the backheating structure, the temperature of the coolant in the throttling element can be reduced by performing backheating in a throttling process, thereby retarding the evaporation of the coolant and the change of the dryness of the coolant, making more stable the flow regime of the coolant and reducing inevitable loss; and the dryness of the coolant at an outlet of the throttling element is reduced, namely, the degree of subcooling of the air conditioner is increased, so the cooling capacity of the air conditioner can be improved. The backheating method and the backheating structure for the heat pump air conditioner can improve the cooling or heating performance of the heat pump air conditioner; and the backheating structure is simplified to a certain extent so as to be convenient to manufacture and save the cost.

The invention discloses a partial flow equivalently-dynamic diluting and sampling system for diesel engine exhaust particles and a control method, belonging to the technical field of engine emission tests. The partial flow equivalently-dynamic diluting and sampling system is used for splitting the flow of engine exhaust with a constant ratio and introducing the engine exhaust in a diluting air duct by virtue of a flow-splitting and diluting pipeline with closed-loop feedback control, mixing the engine exhaust with clean air to form uniform diluted exhaust gas, introducing the diluted exhaust gas with a constant ratio in a sampling channel filter paper retainer by virtue of a particle sampling pipeline with closed-loop feedback control, collecting the exhaust particles by sampling filter paper placed in the retainer, and then detecting the emission level and the constituents of the diesel engine particles; the partial flow equivalently-dynamic diluting and sampling system can realize two-way transmission for data by an upper computer and a lower computer via an RS232 serial port communication protocol and a customized data format; and compared with the existing test system for diesel engine exhaust particles, the system has no need of a mass flow meter and an exhaust concentration analyser, and has the advantages of being high in control accuracy and low in test and maintenance costs.

The invention discloses a channel type induction heating pouring basket and a pouring method thereof. The channel type induction heating pouring basket comprises a pouring basket body, an induction heater and at least two air blowing pipes, wherein the inner part of the pouring basket body is separated into a molten steel containing cavity which is used for receiving large-basket molten steel and a molten steel pouring cavity which is used for pouring the molten steel by a refractory material, and at least two channels which are used for communicating the molten steel containing cavity with the molten steel pouring cavity are arranged in the lower part of the refractory material in parallel; the height of each channel is lower than 1/3 of the height of an inner cavity of the pouring basket body; an induction coil of the induction heater is arranged between the two channels in a penetrating way; the at least air blowing pipes are arranged in the refractory material of the pouring basket body, and outlets of the at least two air blowing pipes are correspondingly formed in inlet ends, which are positioned at the side of the molten steel cavity, of the channels. The channel type induction heating pouring basket disclosed by the invention can be applied to a continuous pouring whole process for removing impurities and enabling the temperature of the molten steel to be uniform.

The invention discloses a solar thermal power high-temperature long shaft molten salt pump. The solar thermal power high-temperature long shaft molten salt pump comprises a pump shaft, a hydraulic part, a supporting vibration reduction structure, a fluid seal structure and a bearing cooling device are sequentially arranged on the pump shaft from bottom to top, a suction segment is arranged at the front end of the hydraulic part, a blade grid type filter is arranged on the front end of the suction segment, a tail stage flow guide shell is arranged at the tail end of the hydraulic part, the tail end of the tail stage flow guide shell and the front end of a supporting pipe of the supporting vibration reduction structure are fixedly connected, and the tail end of the supporting pipe of the supporting vibration reduction structure is fixedly connected with the bottom of the outlet segment of the fluid seal structure through a flange plate. The solar thermal power high-temperature long shaft molten salt pump is designed to be in the center flow-out manner, thermal expansion uniformity under the high-temperature state can be ensured, through solution schemes of reliable fluid seal design, reasonable cooling structures, flange type expansion joint vibration reduction configuration and the like, safe, reliable and efficient running of the solar thermal power high-temperature long shaft molten salt pump is ensured, and meanwhile, various property indexes are met.

A continuous grease refinery process is carried out by felt oil-water debonding, acid refining, alkali refining, desoaping, washing and drying. It substitutes continuous acid refining reactor or/and continuous alkali refining reactor with alkali delay pot. It has homogeneous mix, proper contact time and full reaction.

The invention relates to a steady-flow delivery device used in twin-roll strip continuous casting production process, which belongs to twin-roll strip continuous casting process technology field. The invention mainly comprises a delivery device with delivery holes and a submerged nozzle; the whole exterior shape of the delivery device is a scaphiform and the cross section is of ''V'' shape with the bottom being a arc. The delivery device is immerged in the steel water in the melting pool. The delivery device is provided with a plurality of delivery holes, including end delivery holes, side delivery holes and bottom delivery holes. A cavity is arranged inside the delivery device which is provided with a cover board on the top half, and a rectangular slot bore is arranged on the cover board, the middle of the delivery device is provided with two steady-flow chamber which is formed by two retaining walls to inhibit turbulent flow; the steel water flows out from the lower end of the submerged nozzle to the steady-flow chamber with retaining walls firstly and then flows out through the retaining walls of the chamber to the cavity space on the both sides and then flows out through a plurality of delivery holes to the melting pool between the twin-roll. The device can stabilize the turbulent flow and the liquid surface, thus leading to the even temperature of the steel liquid in the melting pool and facilitating operation.

The invention discloses a microfluidic chip for preventing cell occlusion by using sheath fluid countercurrent. The microfluidic chip comprises a microfluidic chip main body, which has a focusing module, a sorting module and a main flow channel. The main flow channel is bifurcated at an outlet end of the microfluidic chip main body to form two liquid flow channels, a countercurrent sheath liquid flow path communicating with the main flow channel is disposed between the two flow channels, and the countercurrent sheath liquid flow path is provided with countercurrent sheath liquid opposite to the flow direction of the main flow channel. The microfluidic chip can solve the problem that the cells or particles adhere to a V-shaped wall surface in the prior art, which can prevent the flow channel from being blocked, improves the analysis or sorting precision, avoids the repeated removal and washing of the chip, and reduces the cost. The countercurrent sheath fluid of the present invention cooperates with the sheath fluid in the main flow channel to refocus a sample, and the cells stably flow out of the chip can be ensured.

The invention belongs to the technical field of metering appliances, and particularly discloses a straight-through reflecting type ultrasonic water meter and a heat meter flow sensor. The flow sensor comprises a sensor shell and is characterized in that the middle of the inner wall of the sensor shell is provided with a reflector platform; two ultrasonic energy converters are arranged on the inner wall of the sensor shell opposite to the reflector platform up and down; and a central perpendicular line of the reflector platform and central perpendicular lines of reflecting surfaces of the two ultrasonic energy converters are at the same plane. The straight-through reflecting type ultrasonic water meter and the heat meter flow sensor have the advantages of simple structure, safety, stability, accurate measurement, stable fluid flow state and small pressure loss.

The invention discloses a metal particle flow velocity measuring device based on a triangular electrode capacitance sensor. The device comprises a triangular electrode differential capacitance sensorfor detection, a signal acquisition circuit and a computer which are electrically connected in sequence. The triangular electrode differential capacitance sensor comprises an insulating pipeline whichis provided with an upstream electrode pair and a downstream electrode pair. Shielding electrodes are arranged above the upstream electrode pair, between the upstream electrode pair and the downstream electrode pair and below the downstream electrode pair respectively. The outside of the insulating pipeline is sleeved with a metal shielding cover. The invention further discloses a metal particleflow velocity measuring method based on a triangular electrode capacitance sensor. The computer calculates the velocity of metal particles by analyzing output signals of the sensor. The sensor devicedisclosed by the invention has the advantages of more uniform sensitive field, simple structure, low cost, quick response, high flexibility and high sensitivity, and improves the measurement accuracyof the flow velocity of the metal particles in the pipeline.

The invention provides a three-dimensional cross-interface measurement system, which comprises a signal generator, a circular track, a transparent cylinder sleeve, a support and more than two imaging structural members, wherein each imaging structural member comprises a camera and a plurality of lens assemblies. Cross-interface propagation of optical signals such as flame signals is realized by arranging a transparent cylinder sleeve outside an optical signal generator, a plurality of lens assemblies are arranged on a circular track, and the optical signals are propagated to a camera from the lens assemblies, so that two-dimensional projections of the optical signals in different observation directions are obtained. Therefore, a transparent window of the optical engine is replaced by the transparent cylinder sleeve, an internal optical signal is refracted, an optical path propagation path of the optical signal in the optical engine can be simulated, and then the refraction condition of the internal signal of the optical engine when the internal signal passes through the inner wall and the outer wall of the transparent window in the outward transmission process can be simulated; and an experimental method is provided for solving the cross-interface measurement problem.

The invention discloses an outdoor fire hydrant monitoring system and a detection method thereof. The system comprises a measurement module, a control module, a communication module, a power supply module, a data management and data analysis module and a terminal access module. The measurement module adopts a plurality of high-precision sensors to jointly measure, particularly adopts a micro turbine flowmeter, and realizes the function of a large-size flowmeter at the cost of 20 yuan under the condition that the error precision is less than 1%. And the adopted valve opening and closing sensornot only effectively provides water resource safety protection, but also can quickly respond to the water demand. The communication module effectively and uniformly distributes the number reporting time of the Internet of Things terminal equipment to the time period of the number reporting period, thereby avoiding possible network congestion. And the data management and data analysis module realizes visual feature interpretation, accurate anomaly detection and unified classification management of the fire hydrant data based on an anomaly detection algorithm and a clustering analysis algorithmof machine learning. Scientific management and comprehensive and timely monitoring of the fire hydrant are effectively realized, and the management difficulty is reduced.

The embodiment of the invention discloses a box-type moving bed waste gas purification system which comprises an adsorption purification unit and a regeneration cooling unit, the adsorption purification unit is provided with multiple adsorption layers, and the adsorption purification unit is used for moving a perforated filler box of the upper adsorption layer downwards to the relative position of the lower adsorption layer, feeding a perforated filler box of the bottom adsorption layer into a regeneration cooling unit, andpurifying organic waste gas flowing from bottom to top through each stage of adsorption layer; the regeneration cooling unit is provided with a plurality of desorption cooling layers and is used for heating the filler of each stage of desorption cooling layer through hot nitrogen or water vapor flowing from bottom to top and cooling the filler of each stage of desorption cooling layer through air flowing from bottom to top after desorption is finished; and after cooling is finished, the perforated stuffing box of the upper desorption cooling layer is moved downwards to the relative position of the lower desorption cooling layer, and the perforated stuffing box of the bottom desorption cooling layer is fed into the adsorption purification unit.

The invention discloses a liquid distributor and an air conditioner equipped with the liquid distributor. The liquid distributor comprises a distributing part at the upper end and a liquid inlet part at the lower end, wherein a drainage port is formed in the inner side of the lower part of the liquid inlet part, a flow stabilizing hole communicated with the drainage port is formed in the drainage port, the diameter of an inlet of the flow stabilizing hole is smaller than that of the drainage port, the flow stabilizing port extends to the top end of the liquid inlet part, a plurality of distributing ports at equal intervals are formed in the upper end of the flow stabilizing hole, and the distributing part is provided with a plurality of distributing channels communicated with the distributing ports; and the air conditioner is equipped with the liquid distributor. Liquids entering the liquid distributor are uniformly distributed, non-uniform turbulent flow is prevented from being formed, noise produced when a liquid flows is reduced, and the refrigerating capacity of the air conditioner is effectively improved.

The invention provides a porous flow-limiting noise-reducing orifice plate and a flow-limiting noise reducer formed by the same. According to the porous flow-limiting noise-reducing orifice plate, a flow-limiting orifice is arranged in the center of the orifice plate, other flow-limiting orifices are arranged in a group of concentric circles in an annular mode, the number of the flow-limiting orifices positioned on concentric circles with different radii gradually increases from inside to outside, the center distances of adjacent flow-limiting orifices positioned on the same concentric circlecircumference are the same, and the radius difference of adjacent concentric circles is arranged in an equal difference series from the center to the edge of the orifice plate. The flow-limiting noisereducer is composed of a pipe section and at least one porous flow-limiting noise-reducing orifice plate arranged in the pipe section, and connecting flanges are arranged at two ends of the pipe section. Compared with a conventional porous flow-limiting noise-reducing orifice plate, the noise-reducing capacity is improved, and the pressure loss is obviously reduced.

The invention discloses a cylinder body capable of reducing polishing water gaps of a cylinder. The cylinder body comprises a positive pressing plate and a reverse pressing plate. The positive pressing plate is provided with a plurality of upper cavities and ingates communicated with all the upper cavities; the reverse pressing plate and the positive pressing plate are matched and combined, lowercavities corresponding to the upper cavities are formed in the reverse pressing plate, buffer channel grooves and pouring channel grooves corresponding to the ingates are formed between the lower cavities at intervals, and the pouring channel grooves are communicated with the lower cavities through flow gates. According to the cylinder body capable of reducing polishing water gaps of the cylinder,the pouring speed can be increased, it is guaranteed that a casting is not subjected to a polishing procedure after coming off a line, the delivery efficiency of the casting is greatly improved, andthe delivery bottleneck problem is reduced.

The invention relates to a method capable of realizing on-line prediction of crystallizer flow field flow state in actual production, and belongs to the technical field of continuous casting processesof ferrous metallurgy steelmaking. According to the technical scheme, three rows of steel nail plates are manufactured according to the section sizes of a crystallizer and a water gap, penetrate through a stainless steel support placed near the water gap and a narrow face of the crystallizer to be vertically inserted into the liquid level of the crystallizer from the two sides of the water gap atthe same time under different casting parameter conditions, and are vertically lifted out after several seconds; and the diameter of metal blocks adhered to steel nails, the distance from the highestpoints and the lowest points of the metal blocks to the tail ends of the steel nails are measured correspondingly, and the height difference of the metal blocks at the highest points and the lowest points on two sides of the steel nails is calculated. The method capable of realizing on-line prediction of crystallizer flow field flow state in actual production has the beneficial effects that the advantages and disadvantages of the current continuous casting parameter conditions can be visually explained, a crystallizer flow field flow state transition diagram can be drawn based on a flow statemeasurement result, and casting parameters are optimized and adjusted in real time according to the field production rhythm, so that molten steel in the crystallizer is in a stable flowing state, andthe casting blank quality is improved.

The embodiment of the invention discloses a multi-layer mesh moving bed waste gas adsorption and purification system which comprises an adsorption and purification unit, a desorption and regeneration unit and a cooling unit, the adsorption and purification unit is used for uniformly discharging filler of an upper-stage adsorption layer to a lower-stage adsorption layer through a first conveying belt, feeding the saturated filler of the bottom adsorption layer into the desorption regeneration unit, and purifying organic waste gas flowing from bottom to top through each stage of adsorption layer; the desorption regeneration unit is used for uniformly discharging the filler of the upper-stage desorption layer to the lower-stage desorption layer through a second conveyor belt, feeding the filler of the bottom-stage desorption layer after high-temperature regeneration into the cooling unit, and heating the filler of each stage of desorption layer through hot nitrogen or water vapor flowing from bottom to top; and the cooling unit is used for uniformly discharging the filler of the upper-stage cooling layer to the lower-stage cooling layer through a third conveying belt, feeding the normal-temperature regenerated filler of the bottom-stage cooling layer into the adsorption purification unit, and cooling the filler of each stage of cooling layer through air flowing from bottom to top.

The invention relates to a drying cylinder condensate water draining device. The drying cylinder condensate water draining device comprises a draining pipe installed in a drying cylinder, one end of the draining pipe extends out of the drying cylinder, multiple separators are installed on the draining pipe, an inlet of each separator is connected with a winnowing pan, and an outlet of each separator is communicated with the draining pipe. By means of the winnowing pans, condensate water in the drying cylinder carries part of steam to rush into the separators, the condensate water and the steam are separated through the separators, the steam returns into the drying cylinder, only the condensate water enters the draining pipe under the action of gravity, in this way, the stable flowing state in the draining pipe is kept, and the condensate water can be conveniently drained in time. The condensate water draining device is particularly suitable for draining condensate water in medium-and-high-speed paper making machines.

The invention belongs to the technical field of refrigeration, and particularly discloses a fluoride pump cooling flow compatibility system for a data center. The fluoride pump cooling flow compatibility system for the data center comprises a condenser, a fluoride pump, a one-way valve, a heat-pipe heat exchanger, a control valve, a refrigerant liquid supply pipe, a refrigerant return pipe and a flow compatibility tube, wherein one end of the flow compatibility tube is connected with an outlet of the fluoride pump and the refrigerant liquid supply pipe and the other end is connected to an inlet of the condenser and the refrigerant return pipe; the outlet of the condenser is connected to the inlet of the fluoride pump; the flow compatibility tube is provided with the one-way valve for achieving the target that a refrigerant flows to the condenser from the fluoride pump; at least one heat-pipe heat exchanger is connected between the refrigerant liquid supply pipe and the refrigerant return pipe; and the control valve is arranged at the inlet of the heat-pipe heat exchanger. According to the fluoride pump cooling flow compatibility system for the data center, the problems that a liquid supply branch pipe close to the fluoride pump is over-high in refrigerant flow, the refrigerant in the heat-pipe heat exchanger is unstable in flow state and uneven in flow distribution, the refrigerant between different racks/cabinets is uneven in flow distribution, and the heat dissipation capacity is not up to standard when an existing fluoride pump cooling system is used by the data center can be solved.

The embodiment of the invention discloses a multi-layer fluid bed organic waste gas adsorption and purification system which comprises an adsorption and purification unit, a desorption and regeneration unit and a cooling unit, and the adsorption and purification unit is used for intermittently and uniformly discharging filler of an upper-stage adsorption layer to a lower-stage adsorption layer according to a set frequency; the saturated filler of the bottom adsorption layer is fed into a desorption regeneration unit, and organic waste gas flowing from bottom to top is purified through each stage of adsorption layer; the desorption regeneration unit is used for intermittently and uniformly feeding the filler of the upper desorption layer to the lower desorption layer according to a set frequency, feeding the high-temperature clean filler of the bottom desorption layer into the cooling unit, and heating the filler of each desorption layer through hot nitrogen or water vapor flowing from bottom to top; and the cooling unit is used for intermittently and uniformly discharging the filler of the upper-stage cooling layer to the lower-stage cooling layer according to a set frequency, feeding the normal-temperature clean filler of the bottom-stage cooling layer into the adsorption purification unit, and cooling the filler of each stage of cooling layer through air flowing from bottom to top.