43results about How to "Stable gas pressure" patented technology

The invention discloses a continuous cyclic drilling process applicable to air drilling. The process includes the steps: a valve plate A (7) of a center check valve (2) is provided with a sealing portion A, a valve body A (6) is provided with a sealing match portion A, a valve plate B (12) of a lateral vertical check valve (3) is provided with a sealing portion B, and a valve body B (11) is provided with a sealing match portion B. During normal drilling operation, a pipeline A is connected with the center check valve (2) to supply air to a drill stem; and when the drill stem needs to be demounted, a pipeline B is connected to the lateral vertical check valve (3) to supply air to the drill stem. The continuous cyclic drilling process applicable to air drilling has the advantages that equivalent cycling density of circulation air of a well can be effectively controlled, and stability in well pressure can be effectively maintained. Drilling time is shortened, and the continuous cyclic drilling process applicable to air drilling is significant to reduction of drilling cost.

The invention discloses a constant pressure sequential turbo-charging system of a V-shaped diesel engine. The constant pressure sequential turbo-charging system comprises two columns of air cylinders composed of multiple air cylinders, multiple air exhaust branches corresponding to the multiple air cylinders, a constant pressure exhaust manifold, a shared air inlet box, a first turbocharger, a second turbocharger, an air cooler, an air inlet stop valve and an exhaust stop valve. The constant pressure sequential turbo-charging system is characterized in that the two columns of air cylinders share the same shared air inlet box; the constant pressure exhaust manifold is connected with the air exhaust branches corresponding to the air cylinders to form a loop. In addition, the invention further provides the design of the shared air inlet box. The shared air inlet box comprises a shared air inlet cavity, cylinder cover high-temperature water discharge header pipes and a cylinder cover high-temperature water inlet header pipe. The constant pressure sequential turbo-charging system can improve the performance of full working conditions of the single-stage high-pressure-ratio diesel engine and is compact in structure, so that the overall size of the diesel engine is controlled.

A piercing device is provided, which comprises a housing movable with respect to a gas bottle holder having a gas bottle held therein; a piercing element received in the housing and configured for piercing into a sealing membrane of the gas bottle; and a stressing element, received in the housing; the piercing element being fixed on one end of the stressing element that is close to the gas bottle; the stressing element being capable of synchronously rotating along with the housing for being inserted into the gas bottle, or individually rotating and moving with respect to the housing for pushing the piercing element to pierce into the sealing membrane or releasing gas inside the gas bottle.

The invention discloses a sample cracking voltage stabilizer, comprising a high-temperature cracking furnace and a blind extension-type quartz tube, wherein an argon inlet and an oxygen inlet of the quartz tube are respectively connected with a mass flow meter, a gas buffer device composed of a cylinder, a piston and a stepping motor is arranged at the exit of the quartz tube, the exit of the cylinder is connected with a mass flow meter, a gas pressure detector is arranged in the cylinder, and all the flow meter, the detector and the stepping motor are connected with a control panel of a computer. The sample cracking voltage stabilizer can be applied in relative analytical instruments to detect the content of sulfur and nitrogen, so that the sample reaction is sufficient, air pressure and flow are stable, and therefore, the detection precision is improved, and repeatability deviation is reduced.

The invention provides an apparatus and a method for determining gas diffusion coefficient of a low-intensity low-permeability coating material, which relates to the coating material coefficient determination apparatus and the method thereof. The apparatus comprises two paralleled vacuum chambers of a measuring chamber and an aeration chamber which are connected through an air exhaust channel with a seal flange, the seal flange faces to one side of the aeration chamber, a disk shaped blank flange or a test sample is fixed in a sealing mode by using a flange gland and a sealing ring; an operable aeration chamber door is arranged in the aeration chamber, which is used for arranging or dismounting the blank flange or the test sample; an aeration chamber pressure gauge, an aeration pipeline having a pressure adjusting control valve and an air exhaust pipeline having an aeration chamber valve are arranged in the aeration chamber; the measuring chamber pressure gauge and the air exhaust pipeline having a measuring chamber valve are arranged in the measuring chamber, and the background leakage rate of the measuring chamber is relatively stationary. The apparatus can use a thin coating material for measurement, for the low-permeability coating material, data for stabilization of gas pressure and gas flux can be rapidly acquired, and the measurement result is accurate.

The invention discloses a continuous pressure-variable sampling device for an Archimedes spiral mass spectrometer, which includes a motor and a base. The metal pipe shaft of the channel, the metal pipe shaft of the gas channel rotates through the first bracket and the second bracket in turn, the metal tube shaft of the gas channel is located above the first bracket, and the combined gear is snapped, and the upper end of the metal tube shaft of the gas channel runs through the second bracket. The gas channel disc is welded behind the bracket; the drive motor drives the gas channel disc to rotate and translate the translation plate through a series of reduction transmission systems, so that the air inlet on the translation plate is always connected with one of the Archimedes spiral grooves, By changing the gas path length and cross-sectional area of ​​the Archimedes spiral groove, it has the ability of high-precision sampling and analysis of a wide range of variable pressure gases; the invention has high sampling accuracy and has the ability of continuous online sampling of the analyzed gas .

The invention discloses a continuous pressure-variable sampling device for a serpentine mass spectrometer, which includes a housing and a mass spectrometer system. An inner plate with a serpentine groove on the upper surface is slidably installed inside the housing. The serpentine line The cross-sectional area of ​​the groove gradually increases from the inlet end to the outlet end. The gas outlet of the serpentine groove penetrates the side wall of the shell through the connecting pipeline and connects with the mass spectrometer system. The lower surface of the inner plate is supported by springs and bearings. The upper surface of the inner plate is closely attached to the inner upper wall surface of the outer shell with ventilation grooves. The air inlet of the air groove penetrates through the upper wall of the outer shell and is connected with the air inlet pipeline and the air inlet valve. The driving motor is driven by the screw mechanism. The inner plate slides in the shell; the invention has compact structure, good airtightness, and has the ability of continuous online sampling of the gas to be analyzed; through the serpentine layout and the sliding of the inner plate in the shell, the gas path of the serpentine line groove can be changed Length and cross-sectional area, so that it has the ability to sample and analyze a wide range of variable pressure gases with high precision.