96results about How to "Guaranteed differential pressure" patented technology

The invention relates to a top-emission AMOLED pixel circuit and a driving method thereof; the top-emission AMOLED pixel circuit comprises the following units: a first film transistor (T1) connected with a first node (G), a second node (S) and a third node (D); a second film transistor (T2) connected with a scan signal (Scan), the first node (G) and a data signal (Data1); a third film transistor (T3) connected with the scan signal (Scan), the second node (S) and a reference voltage (Ref); a fourth film transistor (T4) connected with the scan signal (Scan), the third node (D) and a power supply high voltage (Data2); a first capacitor (Cst) connected with the first node (G) and the second node (S); a second capacitor (C) connected with the third node (D) and the reference voltage (Ref); an OLED connected with the second node (S) and a power supply low voltage (VSS); the difference between the power supply high voltage (Data2) and the power supply low voltage (VSS) remains unchanged. The invention also provides the corresponding driving method. The top-emission AMOLED pixel circuit and the driving method thereof can effectively alleviate IR voltage drop caused by the transparency cathode impedance increases.

The invention relates to a vortex solidification underground water remediation system. The vortex solidification underground water remediation system is arranged in an underground water to-be-remediated area, and comprises a pumping well, water injection wells and fences. The pumping well is formed in the center of the to-be-remediated area, the multiple water injection wells are arranged at intervals along the outer contour line of the to-be-remediated area, an inorganic inert adsorption material is injected into the water injection wells, and the closed adsorption material fences are formedon the outer side of the to-be-remediated area, wherein the adsorption material fences have good water permeability, and the height of the fences is at least equal to the covering depth of polluted underground water. By performing large-drawdown pumping on the pumping well and large-flow reinjection on the water injection wells, a cone of depression is formed, and after the adsorption material adsorbs pollutants in the underground water, the pollutants are degraded and solidified, gather towards the pumping well group along with the migration of the underground water and then are pumped to thesurface through the pumping well group for surface treatment and purification. The vortex solidification underground water remediation system has the advantages of small pumping amount, short cycle and large treatment range.

The invention discloses a full-automatic oil-chromatography sample feeding device for a transformer. The device comprises a detection device, an oil-gas separation device, a gas tank, a gas collection device and an inspection device, wherein the oil-gas separation device comprises a degassing tank with movable bottom; a tank bottom pushing device and a gravity compensation device are connected to the tank bottom; a stirring device is arranged in the degassing tank; a gas sampling hole, a sampling hole, a nitrogen inlet and an oil discharging hole are formed in the degassing tank, the gas sampling hole is connected with the gas collection device, the sampling hole is connected with a sample, the nitrogen inlet is connected with the gas tank, and the oil discharging hole is connected with an oil collection tank. The full-automatic oil-chromatography sample feeding device aims at pretreatment processes of detecting gas components dissolved in transformer oil in a gas chromatography manner in a laboratory; the device automation is realized in operation processes originally required to be manually operated, so that the detection efficiency of an oil-immersed transformer can be improved, errors brought from pretreatment links can be reduced, the manpower can be saved, and the device is worthy of being popularized and applied.

The invention discloses an air quantity control method and device for a clean workshop. The clean workshop comprises a clean space. The method comprises the following steps: the running state of the clean space is obtained, and the running state comprises a dynamic state and a static state; when the clean space is in the dynamic state, a real-time dust generation equivalent weight in the clean space is obtained on the basis of the running state of process equipment in the clean space and the number of personnel; a target ventilation rate corresponding to the clean space is obtained on the basis of the real-time dust generation equivalent weight; a target total air quantity needed by the clean space is obtained on the basis of the target ventilation rate; an air supply quantity corresponding to the clean space is dynamically adjusted according to an air quantity change speed corresponding to a preset first ventilation rate; and air supply is carried out on the clean space according to the air supply quantity, until a target total air quantity is reached. The air quantity control method and device for the clean workshop are capable of dynamically adjusting the air supply quantity inthe clean space as needed, effectively guaranteeing pressure difference in the clean space, and reducing the redundant air quantity to reduce the energy consumption.

The invention discloses an incremental launching construction method for a large, ultrahigh and small-radius circular curve steel box girder. The incremental launching construction method comprises the following steps that walking type incremental launching equipment and a temporary bearing beam are arranged; the steel box girder is assembled according to a cross slope and a longitudinal slope which are designed according to the girder body during assembly, and the steel box girder is pushed to the temporary bearing beam on the top of an adjacent cover beam through a pushing jack on an assembly jig frame and the walking type incremental launching equipment on the top of the cover beam; curve incremental launching of the steel box girder is carried out; the deviation of the steel box girder is corrected; and incremental launching counterweight of the steel box girder is carried out, according to the segment division of the steel box girder, the walking type advancing distance of the steel box girder and the cantilever length of the steel box girder are planned, and according to the working condition calculation result of each incremental launching of the steel box girder, counterweight adjustment is carried out on the existing negative reaction force working condition and the working condition of unbalanced stress on the inner side and the outer side of the steel box girder. The purposes that the forward bending moment and torque effect of a cantilever state at the box girder end under the incremental launching state of the small-radius steel box girder is overcome, and it is guaranteed that the pressure difference between incremental launching equipment on the inner side and the incremental launching equipment on the outer side is within a certain range are achieved.

The present invention provides a refrigerating apparatus to obtain an adequate medium pressure of the refrigerant circuit of the refrigerating apparatus and precisely obtain the effect of a split cycle, thereby enhancing the performance of the refrigerating apparatus. The refrigerating apparatus (R) in the present invention has a split cycle device, in the refrigerating apparatus (R), an operation amount of the valve open degree of a auxiliary reducing means (83) is determined by calculating and merging from a first control amount to a third control amount, wherein the first control amount is obtained based on a discharged refrigerant temperature (DT) of the compressor (11), the second control amount is obtained based on an over-compression judgment value (MPO) and a high pressure side pressure (HP), wherein the over-compression judgment value (MPO) is obtained based on an adequate medium pressure (MP) and a low pressure side pressure (LP) of the refrigerant circuit, and the third control amount is obtained by a difference between a temperature (GCT) of the refrigerant passed through the gas cooler and a temperature (LT) of the second refrigerant flow passed through the intermediate heat exchanger.

The invention relates to an oil-gas separator, and belongs to the technical field of automobile engines. The oil-gas separator comprises a separator body, a moving gas gathering chamber, an oil-gas separating part, a pressure adjusting valve, a small load one-way valve, a large load one-way valve, a small load channel and a large load channel; the moving gas gathering chamber is arranged on the left portion of the separator body, and is connected with the oil-gas separating part, the pressure adjusting valve is arranged on the rear side of the oil-gas separating part, the small load channel and the large load channel are formed in the rear side of the pressure adjusting valve, the small load channel is provided with the small load one-way valve, and the large load channel is provided with the large load one-way valve. The one-way valves are directly integrated in the separator body, the oil-gas separating part of the special structure is arranged, oil and gas can be efficiently and thoroughly separated, the separating efficiency is improved, meanwhile,, the structure of the oil-gas separator is simplified, the manufacturing cost of the separator is reduced, the oil-gas separating efficiency is ensured, meanwhile, it is ensured that the pressure difference of the whole oil-gas separator is within the reasonable range, and the engine oil consumption is reduced.

The invention relates to a filtering device for farmland irrigation, and discloses an anti-blocking drip irrigation filtering system. The anti-blocking drip irrigation filtering system comprises a first-stage filter and a second-stage filter which are connected in series; each filter comprises a tank body and a filtering screen; the upper end of the tank body of each filter is provided with a water outlet, and the lower end of the tank body of each filter is provided with a water inlet. The anti-blocking drip irrigation filtering system is characterized in that the first-stage filter comprises at least one filter, and is internally provided with filter screens; the second-stage filter comprises at least two filters and is internally provided with filter screens and filter elements, and the filter elements are installed in the filtering screens, and are quartz sand filter elements; the filter screens and the water outlets of the tank bodies are connected. The anti-blocking drip irrigation filtering system can effectively prevent sediment in water from blocking a valve and a drip irrigation belt, and can be widely applied to irrigation of crops.

This application discloses a construction method for jacking steel box girders with large, super-high and small radius circular curves, including the following steps: walking-type jacking equipment and temporary pad beam arrangement; steel box girders are assembled according to the transverse slope designed for the beam body Assembled with the longitudinal slope, the steel box girder is pushed to the temporary pad beam on the top of the adjacent cover beam by the jacking jack on the assembled tire frame and the walking-type jacking equipment on the top of the cover beam; the curved steel box girder is pushed ;Steel box girder deflection correction; steel box girder push counterweight, according to the section division of steel box girder, plan the walking distance of steel box girder and the cantilever length of steel box girder, and push the steel box girder each time According to the calculation results of the working conditions, the counterweight is adjusted for the existing negative reaction force working conditions and the unbalanced working conditions of the inner and outer sides of the steel box girder. The application achieves the purpose of overcoming the positive bending moment and torque effect of the cantilever state at the end of the box girder under the pushing state of the small-radius steel box girder, and ensuring that the pressure difference between the inner and outer pushing devices is within a certain range.