2895 results about "Gas transmission" patented technology

The invention discloses a deep coal rock in-situ gas content and adsorption / free gas proportion calculation method and device, and relates to the field of reservoir resource potential evaluation.The deep coal rock in-situ gas content and adsorption / free gas proportion calculation method comprises the steps that an isotope fractionation model coupled with a double-dispersion pore structure (matrix pores and kerogen pores) and a multi-gas transmission mechanism (viscous flow, Knudsen diffusion and surface diffusion) is constructed; the accumulated analytic gas quantity and the apparent isotope value of the produced gas obtained through solving are fitted with the actually measured accumulated analytic gas quantity and the apparent isotope value of the produced gas, and key parameters corresponding to the optimal fitting result are obtained; and determining the in-situ gas content, the in-situ adsorption gas proportion and the in-situ free gas proportion according to the productivity evaluation parameters at the initial moment corresponding to the optimal key parameters. According to the method, the in-situ gas content, the in-situ adsorbed gas proportion and the in-situ free gas proportion of the deep coal rock are calculated on the basis of an isotope fractionation model coupled with a double-dispersion pore structure and a multi-gas transmission mechanism, so that the gas resource content of the deep coal rock is predicted.

A molten salt reactor system may produce fission products, such as molybdenum-99, which may be extracted by an extraction system. The extraction system may be configured to sparge the molten fuel salt with an inert gas to dislodge gaseous fission products from the molten fuel salt, so that the gaseous fission products flow through an off-gas outlet into a gas transfer assembly. The example extraction system may also include introducing a gaseous halogenating agent to prevent the fission products from depositing on a pipe surface of the gas transfer assembly. The gaseous fission products may flow from the gas transfer assembly to a carboy containing an aqueous solution, to process and / or filter the fission products. The resulting solution containing processed fission products in the carboy may be further distilled into final, usable products.

The invention discloses a temperature swing adsorption helium low-temperature purification system which comprises a vacuum cold box, and a first-stage dividing wall heat exchanger, a liquid cold medium Dewar, a high-temperature area adsorption unit, a second-stage dividing wall heat exchanger, a cold head heat exchanger and a low-temperature area adsorption unit are sequentially connected in the vacuum cold box in the gas transmission direction. Wherein the input end of the first-stage dividing wall heat exchanger is connected with the outside through a pipeline, and is used for introducing crude helium; the high-temperature area adsorption unit is used for adsorbing impurity gas with the boiling point temperature being greater than or equal to 77K in the crude helium, and the low-temperature area adsorption unit is used for adsorbing impurity gas with the boiling point temperature being 20K-30K in the crude helium, so that high-purity helium is obtained. According to the invention, not only can high-flow high-component impurity gas with the boiling point of 77K or above be treated, but also high-flow high-component impurity gas with the boiling point of 30K or below can be treated, and high-flow multi-component high-concentration industrial production working conditions can be better matched by adopting physical adsorption of the high-temperature and low-temperature region adsorbents.

The invention discloses a sewage treatment tank for steel structure production, and belongs to the technical field of sewage treatment tanks, the sewage treatment tank comprises a tank body supported and placed above the ground, the upper end of the tank body is fixedly provided with a support frame, the middle position of the upper end of the support frame is fixedly provided with a motor, and the output end of the motor is fixedly provided with a stirring shaft; meanwhile, two medicament hoppers are symmetrically and fixedly mounted on the support frame; the material control assembly is mounted below the supporting frame and is used for controlling intermittent feeding of the medicament hopper; the defoaming assembly is arranged on the inner side of the upper part of the tank body; the fixed frames are uniformly and fixedly mounted on the outer side of the lower part of the stirring shaft, movable cylinders are telescopically mounted on the outer sides of the fixed frames, and gas transmission assemblies are arranged on the stirring shaft, the fixed frames and the movable cylinders; the mud scraping plate is fixedly mounted at the lower end of the stirring shaft. According to the sewage treatment tank for steel structure production, intermittent chemical feeding can be carried out, sewage and chemicals can be fully stirred to react, and automatic defoaming can be achieved in the stirring process.

The invention provides a preparation method of an hourglass type covalent organic framework (COF) composite membrane, and belongs to the field of gas membrane separation. According to the method, covalent organic framework nanosheets with different pore diameters and charge characteristics are utilized to construct the COF composite membrane with a unique hourglass structure through a vacuum-assisted layer-by-layer assembly technology, so that precise regulation and control on H2 and CO2 gas transmission behaviors are realized, and the prepared composite membrane shows remarkable H2 / CO2 separation selectivity and high permeation flux, and has a good application prospect. The chemical stability, the thermal stability and the mechanical flexibility are excellent. The invention provides a novel solution for efficient gas separation and energy storage application.

The invention discloses a PEM electrolytic cell GDL performance test method and system based on multi-dimensional parameters. The method comprises the steps that a sensor array is used for collecting the gas transmission rate, conductive resistance and mechanical deformation data in real time when a GDL gas diffusion layer operates; preprocessing and synchronously analyzing the acquired data to generate a feature matrix with multi-dimensional performance parameters; based on the generated feature matrix, a deep reinforcement learning algorithm is adopted to dynamically adjust test conditions so as to optimize a test process; performing comprehensive scoring on test results under different working conditions by using an adaptive weighted fusion algorithm; and according to the comprehensive score and the actual working condition demand, dynamically adjusting the test process through a feedback control mechanism until the test result meets the actual working condition demand. Through the integrated sensor array module, real-time monitoring and analysis of multi-dimensional parameters are realized. The comprehensive performance of the GDL in an actual working condition environment can be comprehensively considered through the multi-dimensional parameter comprehensive evaluation capability, and a more comprehensive and accurate basis is provided for performance evaluation of the GDL.

The invention relates to the technical field of oil and gas transmission, and discloses an intelligent leakage early warning flexible composite pipeline system and an early warning method.The system comprises a composite pipeline body, an optical signal processing device and a data processing unit, and the optical signal processing device is in communication connection with the data processing unit to achieve data transmission. The early warning method corresponds to the system. According to the invention, intelligent leakage early warning and monitoring of the flexible composite pipeline system are realized; the distributed temperature sensing element can sense the temperature change of the pipeline; the optical signal processing device converts the laser signal into an electric signal and transmits the electric signal to the data processing unit; the data processing unit calculates the on-way temperature and the leakage position of the pipeline and gives an alarm for abnormal data; the problem that a traditional flexible composite pipe lacks a sensing function is solved, environmental pollution and energy loss caused by pipe transportation oil gas leakage are effectively reduced, safety and stability of oil gas transportation are guaranteed, and the intelligent development of the composite pipeline industry is promoted.

The invention discloses a circumferential weld safety management system and method based on a knowledge graph, and the system comprises a data collection and processing module which is used for collecting data related to a circumferential weld in an oil and gas transmission pipeline from various data sources, and carrying out the preprocessing and cleaning of the collected data, and obtaining the preprocessed data; the knowledge extraction and graph construction module is used for extracting key information from the preprocessed data and constructing a knowledge graph based on the key information; the risk sorting and hidden danger positioning module is used for carrying out correlation analysis based on the knowledge graph, determining risk key factors and carrying out risk sorting based on the risk key factors so as to determine target positioning information of risk circumferential welds in the oil and gas transmission pipeline; and the defect automatic analysis module is used for acquiring a magnetic flux leakage internal detection signal of the risk circumferential weld according to the target positioning information, and performing defect analysis based on the magnetic flux leakage internal detection signal to obtain a defect type and a defect grade of the risk circumferential weld. And the efficiency of positioning the hidden danger of the circumferential weld of the oil-gas transmission pipeline is greatly improved.

The present invention discloses a multi-cabin multiplexed animal respiration thermometry metabolic analysis system and a detection method in the field of metabolic cabin technology, comprising a metabolic cabin control group and multiple metabolic living cabins. An equipment cabinet is arranged inside the metabolic cabin control group, and detection pipelines for collecting gas and gas transmission pipelines for conveying gas are respectively arranged between the equipment cabinet and the multiple metabolic living cabins. A buffer empty cabin for conveying gas buffer is arranged on the inner rear side of each metabolic living cabin, and the buffer empty cabin is connected to the gas transmission end of the gas transmission pipeline, an exhaust solenoid valve is installed between two adjacent detection pipelines, and an intake solenoid valve is installed between two adjacent gas transmission pipelines. The present invention utilizes the buffer empty cabin to ensure the stability of the gas entering the metabolic living cabin, and flushes and corrects the sensor inside the concentration analyzer with standard gas, thereby reducing the accuracy of the detection data affected by the internal drift of the sensor inside the concentration analyzer.

The invention discloses a pressure pipeline pressure resistance detection machine capable of performing contrast detection, and belongs to the technical field of pressure pipeline detection, the pressure pipeline pressure resistance detection machine comprises a support frame, two fixing plates are symmetrically arranged on the upper end face of the support frame, and two electric cylinders are symmetrically mounted on the side of a pressure pipeline; the angle adjusting mechanism is arranged between the electric air cylinder and the fixing plate; the pushing assembly is arranged between the electric air cylinder and the pressure pipeline; and the gas transmission assembly is arranged on the side of the output shaft of the electric cylinder. When the pressure pipeline is detected, the pressure-resistant performance detection machine capable of performing comparative detection for the pressure pipeline can automatically change the detection angle and can automatically adjust the position of the pressure pipeline without frequently adjusting the pipeline or replacing different detection machines, so that the detection comprehensiveness is improved, and the detection efficiency is improved. And meanwhile, when the pressure resistance detection is carried out, the detection diversity can be improved by changing the test temperature.

The invention discloses an electric propulsion high-pressure fluid micro-flow control system and belongs to the technical field of electric propulsion flow control. The problems that an existing pressure reduction system is poor in control precision and low in reliability when working frequently are solved. An outlet of a gas cylinder is connected with a gas inlet of a proportional valve through a gas transmission channel, and a self-locking valve and a pressure adjusting system are sequentially arranged on the gas transmission channel; the proportional valve is connected with three third electromagnetic valves at the same time and is respectively used for controlling the on-off of the anode branch, the cathode branch A and the cathode branch B; the pressure sensor PIII is arranged at an air outlet of the proportional valve and used for collecting the pressure of the air outlet of the proportional valve; the pressure adjusting system collects the pressure of the gas transmission channel and sends the pressure to the controller, and the controller controls the pressure adjusting system, the proportional valve and the three third electromagnetic valves according to the pressure of the gas transmission channel, the pressure of the pressure sensor PIII and the working mode of the system. The method is suitable for electric propulsion system control.

The invention provides a spatial ALD (atomic layer deposition) coating device, a coating method and a composite film. According to the spatial ALD coating device, a coating cavity comprises at least one group of reaction areas which are connected in sequence, and the adjacent reaction areas are isolated through air curtains; each group of reaction areas consists of a precursor reaction area and a co-reactant reaction area which are separated by an air curtain; the gas inlet assembly comprises a precursor source gas inlet piece, a co-reactant source gas inlet piece and a gas curtain supply piece; the precursor source gas inlet piece comprises a precursor source gas supply device and a precursor source gas transmission device; the co-reactant source gas inlet piece comprises a co-reactant source gas supply device and a co-reactant source gas transmission device; the air curtain supply part comprises an air curtain air supply device and an air curtain air conveying device; and the substrate to be coated is driven by the conveying mechanism to sequentially pass through each group of reaction areas. According to the spatial ALD coating device, the preparation of a composite film with any material ratio can be realized according to requirements, the production efficiency is improved, and the application range is widened.

The invention discloses spraying equipment for automobile production, and relates to the field of spraying equipment.The spraying equipment comprises a sliding base and an air delivery pipe, a spraying mechanical arm is installed on the sliding base, a movable head is movably installed on the spraying mechanical arm, two spraying heads are arranged on the movable head, and the air delivery pipe is connected with the sliding base. The two spraying heads are both connected with the gas conveying pipe; and a switching box is mounted on the movable head. It needs to be explained that in the embodiment of the invention, when one spraying head is blocked, the gas pressure in the switching box is increased, the switching plate is made to move, the switching through hole in the switching plate corresponds to the other output hole, at the moment, high-pressure gas is input into the other spraying head through the auxiliary output pipe, and switching of gas conveying pipelines is achieved; and meanwhile, the L-shaped frame drives the two spraying heads to be switched, then the switching plate and the two spraying heads are switched synchronously, and therefore when the spraying heads are blocked, the purpose of automatic switching is achieved, and continuous spraying work is guaranteed.

The invention belongs to the technical field of natural gas transportation and distribution filtration of natural gas stations, and relates to a filter and a filter element backwashing method thereof without stopping natural gas transportation and distribution filtration. The filter comprises a main cylinder, a main filter element and a backwashing device, wherein the backwashing device comprises an air blowing cylinder arranged in the main filter element, a high-pressure hose used for conveying high-pressure gas into the air blowing cylinder and a driving mechanism used for driving the air blowing cylinder to reciprocate in the main filter element in the axial direction; the air blowing cylinder is of a cylindrical structure with two closed ends, and a plurality of air blowing holes are formed in the side wall; the high-pressure hose is located in the main filter element, the bottom end of the high-pressure hose is connected to the top end of the air blowing cylinder, the top end of the high-pressure hose is externally connected with a high-pressure air supply source, and high-pressure air entering the air blowing cylinder is blown out through the air blowing holes to backwash the main filter element from inside to outside. The air blowing cylinder of the filter can perform movable backwashing in the main filter element, so that the whole main filter element is helped to recover the filtering effect, and the backwashing device can independently operate to backwash the main filter element while the filter continuously filters natural gas.

The invention provides a dispersion gas assembly for a semiconductor, and belongs to the field of gas assembly connection, the assembly comprises a first joint unit and a second joint unit which can be axially butted and separated, and the first joint unit and the second joint unit are symmetrical in structure and respectively comprise a connecting sleeve and a built-in sealing assembly; a ventilation opening is formed in the butt joint end of the connecting sleeve, an annular plugging groove is formed in the circumferential inner wall, the sealing assembly is composed of a supporting ring for plugging, a plugging piston, a pushing abutting rod, a backward moving limiting ring and a plugging spring, the plugging piston slides in the plugging groove to control opening and closing of the ventilation opening, and the plugging spring provides reset elastic force. During butt joint, the pushing abutting rods on the two sides extrude each other, the blocking piston is driven to overcome the elastic force of the spring to move backwards, the ventilation opening communicates with the ventilation hole, and a gas channel is opened. According to the assembly, through the collaborative design of mechanical linkage and hydraulic sealing, reliable opening and efficient sealing of a gas passage during butt joint of joints are achieved, the gas leakage risk is effectively reduced, and the high-precision requirement for transmission of dispersion gas for semiconductors is met.

The utility model relates to a small-sized low-temperature gas purification and pressure control device which comprises a particulate matter filter, a pressure buffer tank, a pressure controller, a purifier and a parallel gas conveying pipeline, the parallel gas conveying pipeline is divided into a gas inlet channel, a flow dividing channel, a purifying channel, a connecting channel, a refrigerating channel and a gas outlet channel through valve assemblies. According to the utility model, unnecessary parts are omitted, and only the particulate matter filter, the pressure buffer tank, the pressure controller, the purifier and the parallel gas conveying pipeline are reserved, so that the volume of the equipment is effectively reduced while the gas purity and the pressure stability are ensured, and the whole structure is more compact; and three different lines are arranged to carry out pipeline purging, gas leakage detection and gas conveying work respectively, so that normal operation of the refrigerating machine is guaranteed, the service life of a product is greatly prolonged, and the reliability of the product is greatly improved.

The invention discloses a reaction kettle device for synthesis of an iron phosphate material, and particularly relates to the technical field of synthesis of battery materials, and the device comprises a kettle body, a driving motor, a transmission disc and a turbo-type paddle. A sealing cover is arranged at the top of the kettle body, a driving motor is connected with a rotating shaft, an anchor blade is arranged below the rotating shaft, and the bottom realizes turbine blade lifting and sleeve guide limiting through transmission of a piston cavity and compressed gas; and a ratchet wheel on the outer wall of the rotating shaft is meshed with a pawl in the transmission disc in a one-way mode, and intermittent wall scraping is achieved. According to the device, dead angles are broken through synergistic stirring of the double blades, the mixing uniformity and the reaction rate are improved, materials adhering to the wall are efficiently removed through intermittent wall scraping, the stable reaction environment is guaranteed through multiple sealing, the structure is flexible to adjust, maintenance is convenient and fast, efficient and high-quality synthesis of the iron phosphate material can be achieved, and the device is suitable for industrial large-scale production.

The invention relates to the technical field of vacuum measurement, in particular to a device for expanding the linear range of mass spectrometry measurement, which comprises a gas transmission pipeline, an electromagnetic valve, a small hole and a mass spectrometer, and is characterized in that the front end of the gas transmission pipeline is used for allowing a sample to be measured to enter, and the rear end of the gas transmission pipeline is connected with the mass spectrometer; the middle part of the gas transmission pipeline is divided into three channels, namely a first gas transmission pipeline, a second gas transmission pipeline and a third gas transmission pipeline; the first electromagnetic valve and the first small hole are sequentially arranged on the first gas transmission pipeline, the second electromagnetic valve and the second small hole are sequentially arranged on the second gas transmission pipeline, and the third electromagnetic valve and the third small hole are sequentially arranged on the third gas transmission pipeline. According to the method, manual dilution or segmented sample injection is not needed, a wide concentration range can be covered by single analysis, more than 60% of time cost is saved, and measurement in a dynamic range of 106 is realized.

The invention relates to the technical field of axially split pumps, and discloses a self-balancing single-stage double-suction axially split pump which comprises an axially split pump and a motor, the motor is connected with a pump shaft in the axially split pump, the impeller is used for being connected with the pump shaft, and the oil injection unit is arranged on the axially split pump and used for injecting lubricating oil into the area where the pump shaft is located. The oil injection unit comprises a locking assembly, an oil injection assembly and a fixing base. When lubricating oil injection work needs to be carried out, gas transmission work can be carried out in the other gas inlet nozzle, so that a second sealing seat moves towards a first rotary knob, a gap is formed between a driven rod and a second sealing block, and then lubricating oil can move to a fixing seat and a self-locking assembly from a second connecting seat; and finally, the water is injected into the area where the bearing and the pump shaft are located, so that the lubricating effect on the bearing and the pump shaft is achieved, the condition of dry grinding during rotation of the pump shaft is avoided, and smooth work of the axially split pump is guaranteed.

The invention discloses a wellhead device for gas production and a control system thereof.The wellhead device comprises a gas mine connecting bridge assembly and a gas connecting output mechanism, a sealing lifting sleeve is arranged above the gas mine connecting bridge assembly in a sleeved mode, and a sleeve sealing component is arranged at the top end of the sealing lifting sleeve and connected with a bolt in a sleeved mode; and the top end of the sleeve sealing component is provided with an air pipe head sealing kit which is sleeved by a bolt. According to the device, a structure with a separated state in a lining valve shell is mainly utilized to enable a powerful hydraulic telescopic frame on a top connecting frame to enable a semi-arc plug to ascend and descend, in the ascending and descending operation process, airflow is output through the lining valve shell, the airflow can be in press fit with an adaptive telescopic rod and a stress push plug, and the safety of the device is improved. And the output direction of the lining valve shell can achieve the effect of effectively adjusting the direction, so that when the gas transmission two-outlet valve pipe and the gas transmission three-outlet valve pipe are used for outputting, the effect of continuous working can still be achieved when equipment needs to be maintained.

The invention is suitable for the technical field of gas transmission and distribution and pipe network safety monitoring, and provides a gas pipe network remote valve regulation and control system and method based on intelligent Internet of Things, and the method comprises the steps: obtaining an initial backflow risk value of a target pipeline region and historical data of a downstream pipe section tail end valve corresponding to the target pipeline region, historical data are analyzed, and a plurality of valve turn-off action samples meeting stable working conditions are extracted; according to the method, a conjoint analysis mechanism based on the difference between the valve turn-off action duration change trend and the valve front pressure micro-drop value is constructed, and a correction factor generation mode of slope deviation judgment and the pressure micro-drop relative difference rate at a specific time node is introduced for the first time; and dynamic perception of the evolution state of the sealing performance of the tail end valve is realized.

The invention discloses a multifunctional sample test tube preservation box for water quality detection, and belongs to the technical field of preservation boxes, the multifunctional sample test tube preservation box comprises a box body and a box cover which are fixedly connected through a lock catch in a sealed mode, a partition plate is fixedly installed on the inner side of the box body and the inner side of the box cover, and a balance weight ball is movably installed in the center of the partition plate; the upper end of the balance weight ball is elastically and telescopically connected with a center column, a bracket is fixedly installed on the outer side of the lower portion of the center column, meanwhile, supporting adsorption assemblies are evenly arranged on the bracket, a positioning frame is fixedly installed on the outer side of the upper portion of the center column, limiting rings are evenly arranged on the positioning frame, and an air conveying assembly is arranged below the partition plate. According to the multifunctional sample test tube storage box for water quality detection, test tubes can be buffered and adjusted in a self-adaptive mode, the inner side of the box body can be automatically pressurized in the adjusting process, it is avoided that sealing plugs at the upper ends of the test tubes are loosened and consequently samples are poured, automatic oscillation can be conducted when the test tubes are taken, and the follow-up detection precision is ensured.

vertical regenerative parallel-flow kiln comprising at least two vessels (1,2) interconnected by a gas transfer channel (3), each vessel comprising, in the in-service or out-of-service position, a loading inlet (5) for carbonate mineral rock at the top of the vessel, means for firing the rock, a discharge outlet (8) for the decarbonated calcined material produced at the bottom of the vessel, a cooling air inlet (7) at the bottom of the vessel for counter-cooling the calcined material produced, and a central collecting element (21) having, at its upper end, a collection opening (24) for the cooling air heated by the calcined material and, at its lower end, an extraction outlet (22), each vessel further comprising a protective cap-shaped element (25) which is fixed in the vessel in a position independent of the central collecting element (21),by covering and surrounding its upper end down to a level lower than the harvest opening (24), so as to leave, between this upper end and the cap (25), a free passage for the collection of heated cooling air through the harvest opening (24).

The invention discloses a natural gas station process modeling simulation system based on artificial intelligence, and relates to the technical field of modeling simulation. Comprising the steps that a simulation construction module recognizes geometric features and constructs a simulation data set by conducting global point cloud collection on the gas transmission pipe network; the grid division module is used for acquiring a simulation data set, setting boundary conditions, establishing a fluid simulation field and performing multi-scale grid division; the reconstruction extraction module identifies a torsional weight error region through a clustering algorithm by constructing a grid feature group; a working condition reproduction module performs working condition coupling analysis on the torsion weight error region, judges working condition applicability and splits a grid feature group; the simulation optimization module identifies the linkage effect, extracts a linkage optimization group and optimizes an adjustment strategy, simulation precision and efficiency are improved, and an optimized solution is provided for process modeling and simulation of a natural gas station.

The utility model relates to a casting cooling auxiliary device which comprises a base, a gas transmission assembly, a control valve and a plurality of guide pillars are arranged on the base, the gas transmission assembly comprises a plurality of gas outlets arranged at intervals, the control valve is arranged on one side of the gas transmission assembly, a contact switch is arranged on the top of the control valve, and the guide pillars are arranged on the guide pillars. A gas transmission assembly is arranged on the base, a movable plate is arranged above the gas transmission assembly, a plurality of ventilation grooves are formed in the movable plate, the movable plate is installed on the guide columns in a sliding mode, the guide columns are sleeved with elastic pieces, and the two ends of each elastic piece abut against the base and the movable plate respectively. According to the casting heat dissipation device, heat dissipation can be conducted on a plurality of castings at the same time through the air conveying assembly, compared with the prior art, the heat dissipation speed is higher, the heat dissipation effect is better, the control valve and the movable plate capable of automatically resetting are arranged, the castings only need to be taken and placed in the working process, the air conveying assembly can automatically blow air to the castings, other operation is not needed, and the work efficiency is improved. Operation is simpler and more convenient, and efficiency is higher.

The invention provides an intelligent gas pipeline distribution control method, an Internet of Things system and a medium. The method comprises the steps of obtaining historical use data of a terminal user of a target pipeline; based on the historical use data, determining a distribution demand sequence; generating a gas distribution instruction based on the distribution demand sequence so as to adjust distribution control parameters of a distribution control device in the target pipeline; historical monitoring data and initial gas supply parameters of a gas supply source are obtained; based on historical monitoring data, determining a gas consumption peak period; in response to the fact that the gas transmission time point is in the gas consumption peak period, determining peak regulation parameters of the target pipeline based on the branch transmission demand sequence and the initial gas supply parameters; and generating a peak regulation and distribution instruction based on the peak regulation parameter so as to control a distribution control device in the target pipeline to carry out distribution and peak regulation operation according to the peak regulation parameter. Intelligent control over gas pipeline branch conveying control is achieved, and the stability and efficiency of gas supply are improved.

The invention discloses a gas lift reverse circulation drilling starting pressure and circulation gas supply pressure calculation method. The method comprises the following steps that S1, hydrostatic pressure of the bottom of an inner pipe of a double-wall drill rod is calculated; s2, calculating the friction loss pressure of compressed air of an outer annulus of the double-wall drill rod; s3, calculating the friction loss pressure of the compressed air flowing through the earth surface gas transmission channel; s4, calculating the local pressure loss of the compressed air passing through the orifice in the gas-liquid mixer from the outer pipe of the double-wall drill rod; s5, calculating the liquid phase flow friction pressure loss of the inner pipe of the double-wall drill pipe; s6, calculating the liquid-phase flow friction pressure loss of the deslagging pipeline; s7, calculating the three-phase flow pressure drop of the inner pipe of the double-wall drill pipe; and S8, the starting pressure and the circulating air supply pressure are calculated. According to the method for calculating the starting pressure and the circulating gas supply pressure of the gas lift reverse circulation drilling, the starting pressure and the circulating gas supply pressure of the gas lift reverse circulation drilling can be accurately and conveniently calculated by accurately calculating the pressure of each part of the gas lift reverse circulation drilling process, and a theoretical basis is provided for stable and efficient operation of a circulating system.

The invention discloses a preparation process of a highly graphitized fuel cell microporous layer with a graded pore structure and gradient wetting performance. The preparation method comprises the following steps: firstly, uniformly dispersing carbon black particles in a polyvinylpyrrolidone ethanol solution to prepare a homogeneous viscous spinning solution; then preparing a fiber membrane with a hierarchical pore structure on a plane structure through an electrostatic spinning process, and constructing an excellent water and gas transmission channel; partially entangled fibers are formed in the thickness direction; after drying, stabilization and pre-oxidation are carried out under carbon paper clamping and loading, and fibers are uniformly shrunk and refined; inducing the pre-oxidized fiber membrane to generate highly graphitized transformation under the clamping of a high-purity graphite flake; the preparation method comprises the following steps: taking polytetrafluoroethylene as a raw material, soaking the polytetrafluoroethylene in polytetrafluoroethylene turbid liquid under horizontal placement, drying and melting to enable the polytetrafluoroethylene to be distributed in a gradient manner in the vertical direction, so that good water and gas management performance under a full-humidity working condition (0-100% relative humidity) is realized; and the overall performance of the fuel cell is obviously improved.

The invention provides thermal shrinkage sleeve baking equipment for a steel-plastic conversion elbow pipe for urban gas transmission and distribution engineering. The thermal shrinkage sleeve baking equipment comprises a rack, a displacement mechanism, a baking assembly and a clamping assembly. The rack is provided with at least one clamping and positioning hole, and the clamping and positioning hole is used for fixing the steel-plastic conversion elbow in a penetrating mode. The displacement mechanism is arranged on the rack, and the output end of the displacement mechanism has the freedom degree of moving along the extending track of the steel-plastic conversion elbow. The baking assembly is connected to the output end of the displacement mechanism and is provided with at least one annular baking hole, and each annular baking hole is used for correspondingly sleeving and circumferentially heating the thermal shrinkable sleeve; the clamping assembly is arranged on the rack and provided with at least one clamping opening, and the clamping openings are used for correspondingly clamping the ends of the thermal shrinkable sleeves respectively. According to the thermal shrinkage sleeve baking equipment of the steel-plastic conversion elbow pipe for the urban gas transmission and distribution engineering, the problem that the thermal shrinkage sleeve is wrinkled on the bent arc section can be solved, and the efficiency and the forming quality of baking the thermal shrinkage sleeve on the steel-plastic conversion elbow pipe are improved.

The utility model relates to the technical field of measurement, in particular to a device for detecting the diameter of a circular arc by using a pneumatic gauge, which comprises a pneumatic electronic column, a control panel arranged on the surface of the pneumatic electronic column, a numerical value observation column arranged on the surface of the pneumatic electronic column, a gas transmission joint fixedly arranged on the surface of the pneumatic electronic column, and a gas outlet fixedly arranged on the surface of the pneumatic electronic column. The surface of the gas transmission connector is fixedly connected with a gas transmission pipeline, the surface of the gas transmission pipeline is fixedly connected with a handle, the bottom of the handle is fixedly connected with a measuring support, the bottom of the measuring support is fixedly provided with a diameter measuring body, and the surface of the diameter measuring body is provided with a threaded groove. And the threaded groove is in threaded connection with a locking screw. According to the utility model, gas is adopted as a medium to measure parts, direct measurement can be carried out on a station, the three-coordinate measurement process of the parts is reduced, convenience and high efficiency are realized, and the measurement efficiency is improved.