4results about How to "Keep the pressure constant" patented technology

The invention relates to the field of cardiovascular intervention postoperative nursing equipment, and discloses a cardiovascular intervention postoperative puncture point intelligent hemostasis and monitoring robot which comprises a shell, a fixed pressing frame is movably arranged at the inner bottom of the shell, a flexible pressing pad is fixedly installed at the bottom end of the fixed pressing frame, and a glass pressing piece is fixedly installed in the middle of the flexible pressing pad. A fixing frame is arranged in the middle of the interior of the shell, rotating frames are movably installed at the two ends of the fixing frame, first cavities are formed in the two sides of the interior of the fixing frame, spring pieces are fixedly installed on the two sides of the interior of each first cavity, and the tail ends of the spring pieces extend into the rotating frames on the corresponding sides. The system can accurately and constantly press a puncture point for hemostasis, can visually monitor the bleeding state in real time, can perform intelligent gradient pressure reduction and millisecond-level emergency pressurization, is high in adaptability and convenient to operate, can reduce postoperative bleeding risks and medical care intensity, and guarantees the safety of a patient.

The utility model discloses a nitrogen making machine adsorption tower with a carbon molecular sieve protection structure, which belongs to the technical field of nitrogen making machine adsorption towers and comprises an adsorption tower body, a gas inlet pipeline is arranged at the bottom end of the adsorption tower body, a nitrogen outlet pipe is arranged at the top end of the adsorption tower body, and an oxygen outlet pipe is arranged in the middle of the adsorption tower body. The gas inlet pipeline, the oxygen outlet pipe and the nitrogen outlet pipe are respectively provided with a control valve. The device further comprises a lower sliding plate, a carbon molecular sieve and a protection structure. According to the adsorption tower, entering air is uniform in the adsorption tower body, the impact on the carbon molecular sieve is reduced, meanwhile, the carbon molecular sieve is pressed by the pressing mechanism, the constant pressure of the carbon molecular sieve is kept, and the carbon molecular sieve is prevented from being greatly abraded during operation, so that the carbon molecular sieve can be stably operated, and the service life of the adsorption tower is prolonged. The effect of reducing pulverization loss caused by mutual abrasion of the carbon molecular sieves is achieved, and reduction of the nitrogen production amount is avoided.

The utility model relates to water tank technical field especially relates to an expansion type water tank. Its technical scheme includes the box, the water inlet of being located at the top of box, the water outlet of being located at the bottom of box, still includes the fixed installation in the telescopic expansion box of box, installs the constant pressure module of expansion constant pressure to the expansion box of both sides of box, the constant pressure module includes the transmission case and pressure chamber that intercommunication, the pressure chamber and transmission case fill liquid, the transmission case in sliding installation has with expansion fixed connection of sealing plate of box. The utility model adopts constant pressure module and can provide stable unchangeable system pressure, compares with nonlinear air bag, avoids pressure fluctuation, makes system pressure keep constant on the set operating point, no matter how much expansion water volume is, avoids the risk that air bag pressure sharply climbs in high pressure area, also eliminates the hidden danger that low pressure area buffer is insufficient, improves system pressure stability greatly, can realize effective volume utilization more.

The invention relates to an oil-gas separation online measurement system and a working method thereof, the oil-gas separation online measurement system comprises an oil path unit, a degassing unit, a gas path unit and a measurement unit, and the working method specifically comprises the following steps: S1, bidirectionally cleaning an oil path; s2, blowing and washing a gas path in two directions; s3, quantifying the oil sample; s4, negative pressure extraction and negative pressure exhaust are carried out; s5, circulating the oil sample; s6, carrying out constant-pressure degassing; s7, compressing the gas; and S8, performing constant-temperature measurement. Through the step of arranging a two-way cleaning oil way and a two-way purging gas way before measurement, thorough cleaning of the oil way and the gas way before measurement is effectively guaranteed, in the oil sample extraction, oil-gas separation and gas sample measurement process, the pressure and temperature of oil and gas are kept constant, and the degassing efficiency and consistency are high. A gas path sensor is arranged in the gas path unit, and a constant temperature device is arranged in the measuring unit, so that the temperature and the pressure of gas in the measuring unit are ensured to be the same during each measurement, system errors caused by environmental factors are eliminated, and the accuracy of system measurement is further ensured.