711 results about "Nitrogen cylinder" patented technology

The invention provides a device for testing gas seepage and creepage coupling action of rocks. The device comprises an upper seat, a lower seat, a motor oil pump, a high-pressure nitrogen cylinder and an oil pump, wherein the upper seat is connected with the lower seat; a gas cavity with honeycomb-shaped gas holes is connected to each of the upper seat and the lower seat; the gas cavity which is provided with the honeycomb-shaped gas holes and connected with the upper seat is connected with an outlet pipe; the gas cavity which is provided with the honeycomb-shaped gas holes and connected with the lower seat is connected with a gas inlet pipe; the lower seat and the gas cavity which is provided with the honeycomb-shaped gas holes and connected with the lower seat are connected with a carrying plate; the carrying plate is connected with a loading oil cylinder through a pressurization piston rod; the motor oil pump is connected with the loading oil cylinder; the high-pressure nitrogen cylinder is connected with the gas inlet pipe; and the oil pump is connected with the oil cylinder and a triaxial cavity. The device can be used for performing a gas seepage and creepage coupling test on the rocks under different stress levels and different gas seepage pressures, so that the creepage test for a rock sample can be finished successfully under constant stress; and data is real and reliable.

The pressurized and closed dry coal powder conveyer with several discharge branches includes normal pressure coal portions bin; connected variable pressure bin with gas inlet connected to the nitrogen cylinder, coal powder outlet connected to pressurizing bin and gas outlet connected with filter and the pressurizing bin; pressurizing bin with gas inlet connected to the nitrogen cylinder and coal powder outlet connected to the powder distributor; and powder distributor with lower end connected to nitrogen pipeline and outlet with set shunt branch pipeline. The present invention has powder buffer connected to the pressurizing bin and no mechanical rotating part, and is suitable for closed conveying of high pressure powder. Installing the powder distributor realizes the homogeneous multiple branch conveying with one locking bin system in high overall stability and homogeneous distribution.

The invention discloses a multi-target-line dynamic combustion performance testing system for a solid propellant, which comprises a combustion chamber and gas distribution unit, a test and control unit and a data collecting and processing unit, wherein the combustion chamber and gas distribution unit comprises a combustion chamber, a constant-temperature tank, a high-pressure nitrogen cylinder, a buffer nitrogen cylinder, a relevant valve pipeline, a nitrogen booster pump and a multi-target-line explosive support used for fixing a sample to be tested, wherein one end of the multi-target-line explosive support is provided with an ignition wire connecting post, a ground wire connecting post and 6 to 10 target line connecting posts in the combustion chamber; and the data collecting and processing unit is used for dispatch and control of all function blocks of the testing and controlling unit, analysis and processing of tested data and data management. The testing system can reflect the change of the combustion speed of the solid propellant with the change of pressure by stages, and belongs to the range of testing of dynamic combustion speed; and the traditional target line method and the underwater acoustic emission method can only test the static combustion speed in a single constant-pressure condition, therefore, the testing system disclosed by the invention can obtain a conclusion closer to the actual combustion condition of the solid propellant in a solid-propellant rocket engine.

The invention relates to a pretreatment method for measuring 14C abundance of an organic compound type sample. The method includes transferring carbon atoms in the organic compound into CO2 molecules through combustion, reacting CO2 with a NaOH solution to obtain a saturate NaHCO3 solution, heating the saturate NaHCO3 solution to obtain a saturate Na2CO3 solution, and adopting the saturate Na2CO3 solution for 14C abundance tests. The invention also provides a device used for the method. The device mainly comprises an oxygen cylinder, a nitrogen cylinder, a cold trap A, a three-way stopcock A, a combustion chamber, a cold trap B, a stone, a cold trap C, a three-way stopcock B, a conical flask, a cold trap D, a three-way stopcock C, a U-shaped gas sample collector, a three-way stopcock D, a vacuum gauge, a vacuometer, a piston D and a vacuum pump. On the basis of guaranteeing the measuring accuracy, the method largely simplifies the chemical treatment process, increases the time efficiency and reduced the cost.

The invention provides a bend molding die for automotive seat headrest pipe fittings, which can one-step bend mold the pipe fittings with low process difficulty, high efficiency and low cost. It is comprised of an upper die structure and a lower die structure. The upper die structure includes an upper die plate, the upper part of the upper die plate being connected to the upper die junction platethrough an upper backup plate, the lower part of the upper die being connected to the upper die dead plate through an upper backup plate. The lower die structure includes a lower die plate, the lowerpart of the lower die plate being mounted with a lower backup plate, the lower part of the upper die dead plate being provided with a molding male die structure, the upper part of the lower die platebeing provided with a molding female die structure. The invention is characterized in that the molding male die structure comprises a molding male die and a pressure plate, the molding male die is fixed on the lower part of the upper die dead plate, the pressure plate is connected to the lower part of the upper die dead plate through an upper die unloading screw, a nitrogen cylinder is mounted onthe upper die junction plate, the mandrel of the nitrogen cylinder holds tightly against the upper part of the pressure plate after it drills through the upper die plate, the upper backup plate and the upper die dead plate; the molding female die structure comprises female die frame body, a molding female die and a locating structure, the molding female die being mounted within the female die frame body and facing the molding female die structure, the locating structure being positioned within the female die frame body and transversely two ends of the molding female die; the molding female die comprises a fixed female die and a movable female die, the molding male die and the movable female die are provided with bend molding grooves which cooperate; the fixed female die is fixed on the lower backup plate, the movable female die being mounted on the lower backup plate through the lower die unloading screw, and being held tightly by the lower mandrel.

The invention provides an abyssal environment simulation device suitable for testing material corrosion behavior. The abyssal environment simulation device comprises a high pressure autoclave, a hydrostatic pressure control system of simulated abyssal environment and a simulated environment monitoring control system. The hydrostatic pressure control system of simulated abyssal environment comprises a nitrogen cylinder, an oxygen cylinder, a water tank, a liquid supply tank and a hydraulic pump, artificial sea water is stored in the water tank, a water pump injects the artificial sea water into the liquid supply tank, the nitrogen cylinder and the oxygen cylinder are connected with the liquid supply tank, and the hydraulic pump is connected between the liquid supply tank and the high pressure autoclave so as to inject the artificial sea water meeting the dissolved oxygen content into the high pressure autoclave; the simulated environment monitoring control system comprises a compound sensor, a working electrode, a reference electrode, a temperature control device, a singlechip signal processor and a computer. The abyssal environment simulation device can simulate the characteristic environment parameters, such as the hydrostatic pressure, the environment temperature, the dissolved oxygen content, the pH value, the flow rate and the salinity, of the corrosive medium for the material in the abyssal environment, and is used for testing the related corrosion electrochemistry behaviors of the material in the simulated abyssal environment.

Disclosed is a several-time drawing formation device for a deep-cylinder-shaped piece. The several-time drawing formation device for the deep-cylinder-shaped piece comprises an upper die base and a lower die base. The upper die base and the lower die base are connected with guide pillars through ball bearing guide bushings, a protrusion locating piece is fixedly installed on the upper die base, nitrogen cylinders are arranged on the lower end of the protrusion locating piece, piston rods of the nitrogen cylinders and blank holders tightly press blank materials through a groove at the lower end of a rubber block, a protrusion main body is installed on the protrusion locating piece and is composed of a protrusion die, a polyurethane elastomer, a locating ring, a pressing plate and a protrusion die connecting piece, a cone-shaped concave mould is fixed on the lower die base, and an ejector rod ejects out a workpiece after several-time drawing are finished. Due to the fact that a nitrogen cylinder flange pressing device and the polyurethane elastomer are both used on the several-time drawing formation device for the deep-cylinder-shaped piece, efficiency and quality of drawing formation can be ensured.

A low-temperature abrasive jet machining device is characterized by comprising an abrasive jet generation system, a cooling system and a machining system. The abrasive jet generation system mainly comprises a nitrogen cylinder (1), a grinding bin (2), a gas-powder mixing device (15), an abrasive jet pipe (8) and an abrasive jet nozzle (14). The cooling system mainly comprises a self-pressurizing liquid nitrogen container (5), a liquid nitrogen safe valve (4) and a cooling pipe (16); and one end of the cooling pipe (16) is connected with the self-pressurizing liquid nitrogen container (5) through the liquid nitrogen safe valve (4), and the other end of the cooling pipe (16) is connected with a composite nozzle (11). The abrasive jet pipe (8) and the abrasive jet nozzle (14) connected with the abrasive jet pipe (8) are both installed in the cooling pipe (16) so as to achieve cooling in the flowing process of abrasives, and while the abrasives are ejected out of the abrasive jet nozzle (14), the abrasives are mixed with low-temperature nitrogen entering the composite nozzle (11) through the cooling pipe (16) and then are ejected to a workpiece (13) through an ejection port of the composite nozzle (11). According to the low-temperature abrasive jet machining device, the structure is simple, machining efficiency is high, and the problem of low-temperature quick machining of a hydrophobic polymer is solved.

The invention provides an accumulator ultralow-temperature leak test device and method. The device is mainly composed of a vacuum leak test box for containing an accumulator, a liquid nitrogen low-temperature dewar flask connected with the vacuum leak test box through a pipe with a stop valve, a helium cylinder, a nitrogen cylinder, a vacuum pump, a compressed air source, a pressure gauge located in the vacuum leak test box, a temperature sensor, a sealing tool for vertically sealing the accumulator, a glove operation connector located on a box body and the like. The sealing tool is provided with three holes, namely a liquid nitrogen injection opening, a liquid nitrogen discharge opening and a helium injection opening, and the three holes are connected into the external liquid nitrogen low-temperature dewar flask, a safety discharge region and the helium cylinder through inside-outside connection pipes of the vacuum leak test box respectively. Furthermore, the vacuum leak test box is further provided with a helium mass spectrometer access opening, one end of the helium mass spectrometer access opening is connected with an external helium mass spectrometer, and the other end of the helium mass spectrometer access opening is located in a suction cavity in the helium mass spectrometer. By means of the accumulator ultralow-temperature leak test device, ultralow-temperature leak test can be conducted on the accumulator conveniently.

The invention relates to an automatic infrasonic wave non-pressure oil well liquid level monitoring instrument. A gas storage chamber, a gas chamber pressure sensor, a gas emission device, an infrasonic wave receiving and processing device and a gas-collecting device are arranged in a shell of the monitoring instrument; the gas chamber pressure sensor is connected with the gas storage chamber; the monitoring instrument is also provided with a gas generation device; a gas inlet of the gas generation device is connected with the gas-collecting device through a pipeline; and a gas outlet of the gas generation device is connected with the gas storage chamber through a pipeline. The automatic infrasonic wave non-pressure oil well liquid level monitoring instrument extracts gas from an oil well sleeve, and pressurizes and injects the gas into the gas storage chamber to generate an infrasonic wave pulse required by the measured liquid level; and gunpowder sound bombs or nitrogen cylinders are replaced, so that the automatic infrasonic wave non-pressure oil well liquid level monitoring instrument can work on the non-pressure oil well for a long time automatically, continuously and stably.

The invention relates to an automatic testing method of a wire line coring drilling hoisting-free pressurized water test. The method effectively solves the problems of accurately measuring the pressure in a pressurized water test section and fully exerting the advantages of automatic testing of the wire line coring drilling hoisting-free and pressurized water test. The method comprises the following steps of: drilling a rock by using a drilling tool, taking out the rock core when the drilled hole reaches the test length, uplifting a hollow drill rod, hoisting a pressurized water test embolismby using an inflatable rubber tube, filling the pressurized water test embolism into the hollow drill rod, making the pressurized water test embolism extend out of a drill bit at the lower part of the hollow drill rod, communicating the inflatable rubber tube and a nitrogen cylinder, charging air to the embolism, closing the hollow drill rod and the drilled hole, connecting a pressure sensor of the test section and a flow sensor outside the drilled hole to a pressurized water test comprehensive tester through cables, sealing with an orifice sealer, pressurizing water to the drilled hole section by using a water pump through the orifice sealer and the hollow drill rod, and acquiring data. According to the automatic testing method disclosed by the invention, wire line coring, pressurized water test and automatic testing are fused together, therefore the exploration quality and the exploration efficiency of deep holes in water conservancy and water electricity are greatly improved, and the labor intensity is effectively reduced.

This invention discloses a mould with alterable brake bead resistance, comprising a punch, a matrix, a pressure plate, a brake bead, a brake bead bolster, an ejector rob and a nitrogen cylinder. The brake bead is separated from the matrix or the pressure plate, and the brake bead passes through the matrix or the pressure plate upwards, the lower end of the brake bead contact with the upper end of the ejector rob through the brake bead bolster. The ejector rob of the air cushion of the machine tool pushes the brake bead bolster and the brake bead bolster moves, the height of the brake bead is controlled by the air cushion through the ejector rob. In the entire drawing process, the brake bead resistance changes with the change of the stamping route. The brake bead resistance of this mould can be controlled easily and it is very useful to improve the quality of the product.

The invention discloses a testing device for an ultrahigh-temperature pressure sensor. The testing device for the high-temperature pressure sensor comprises a sealed testing part, a heating part, an air pressure control part and an electric signal measurement control part, wherein the sealed testing part is composed of a stainless steel tube 1, a thermal resistor 2, a tee fitting 5 and an aviation plug 6, one end of the stainless steel tube 1 is sealed while the other end of the stainless steel tube 1 is open, the sealed testing part is used for providing a needed sealed environment for the high-temperature pressure sensor, the heating part is composed of an electric furnace 7 and is used for providing a needed high-temperature environment for the high-temperature pressure sensor, the air pressure control part is composed of a vacuum pump 9, a nitrogen cylinder 10 and an air pressure controller 11 and is used for providing needed different and stable air pressures in the testing process of the pressure sensor, and the electric signal measurement control part is composed of a constant voltage/current source 12, a multimeter 13, a multimeter 14 and a computer 15 and is used for collecting testing data and achieving signal control. The testing device for the high-temperature pressure sensor can provide the sealed and reliable high-temperature testing environment with the high temperature not smaller than 600 DEG C for the high-temperature pressure sensor.

The invention discloses a system of treatment by deep cooling with temperature controlling based on natural circulation. The system is composed of liquid nitrogen tank, filling port, perfusion valve, perfusion tube, heat insulating layer, cold shield, treatment room for deep cooling, internal coil, external coil, pressure transducer of internal-coil entry, temperature transducer of internal-coil entry, fan, nitrogen cylinder, reducing valve, injection control valve, injection tube, pressure transducer of external-coil entry, temperature transducer of external-coil entry, temperature transducer in treatment room for deep cooling, reflux control valve, reflux tube, data acquisition of computer and control system. The system depends on pressure-difference resulting from different consistency of liquid nitrogen and gas nitrogen to impel coolant of liquid nitrogen for circular flowing. Adjusting of coefficient of heat transfer on the surface of work is realized conveniently by controlling flux of circulate liquid nitrogen and rotate speed of fan. The system has much strongpoint including saving circulate power and consumption of liquid nitrogen, easy to control cooling speed of treatment by deep cooling and treatment temperature etc.

The invention discloses a method of excluding gas from a cross-linked polyethylene insulated power cable. The method comprises the following steps: one end of a cable, which is a semi-finished article with a bulge after passing through an extruding machine, is communicated with an outlet formed on a gas pipe of a nitrogen cylinder, the pressure of the nitrogen cylinder is 1 to 2.5 MPa, and the other end of the cable is kept opened; the valve of the nitrogen cylinder is opened to allow the gas to continuously flow out from an opening end of the cable with the bulge beginning to disappear slowly, and the valve can be closed until the bulge has no gas to flow out. The method has the advantages of short time and good effect on excluding gas when the method is adopted to exclude the gas from the cross-linked polyethylene insulated power cable, and can totally exclude the gas existed between a cable sheath and insulated shielding, thereby avoiding potential quality troubles of the cable; the method greatly reduces the drying cost of a drying house through adopting high-pressure nitrogen to exclude the gas, thereby saving cost; and the method has the advantages of simple technology and convenient operation.

The invention discloses a shale gas well simulated reservoir fracture fracturing liquid flowback rate experimental measurement device and method. The shale gas well simulated reservoir fracture fracturing liquid flowback rate experimental measurement device comprises a clamp, a press machine, a thermostat, a constant-speed and constant-pressure pump, an intermediate container, a constant-speed andconstant-pressure pump outlet valve, a fluid inlet valve, a fluid outlet valve, a nitrogen cylinder outlet valve, a nitrogen cylinder and an outlet valve. The method mainly comprises the steps of 1)rock sample preparation, 2) shale physical property parameter testing, 3) testing parameter calculation, 4) fracturing liquid preparation and density testing, 5) testing parameter testing, and 6) shale flowback rate calculation. The shale gas well simulated reservoir fracture fracturing liquid flowback rate experimental measurement device takes into comprehensive consideration the influence of stratum temperature, stratum stress and fluid pressure on shale flowback rate and quantifies influence factors to reflect the shale flowback rate under real stratum conditions and accordingly to providea theoretical basis for shale flowback scheme optimization.

The invention discloses a hose filling and tail sealing machine. The hose filling and tail sealing machine comprises a rotary plate and a plurality of hose cup bases, wherein the hose cup bases can rotate; a filling mechanism, a benchmarking nitrogen filling mechanism and a tail sealing mechanism are arranged along the rotating direction of the rotary plate in turn; the benchmarking nitrogen filling mechanism comprises a rotating shaft, a sleeve and a photoelectric color mark sensor, wherein the rotating shaft can ascend and descend, the sleeve and the rotating shaft are arranged coaxially, the sleeve can rotate, and the photoelectric color mark sensor is fixedly arranged on one side of the sleeve; the hose cup base can rotate along with the rotation of the rotating shaft; the inner diameter of the sleeve is not smaller than the outer diameter of a hose; the circumferential direction of the sleeve is provided with a plurality of vent holes; a nitrogen filling nozzle which can ascend and descend is fixedly arranged in the center of the sleeve; the bottom of the nitrogen filling nozzle extends from the sleeve; the top of the nitrogen filling nozzle is connected with a nitrogen cylinder. According to the hose filling and tail sealing machine, the automatic benchmarking can be performed on the hose after the filling is achieved due to the benchmarking nitrogen filling mechanism and meanwhile the air inside the hose can be discharged and accordingly the quality life of the paste liquid in the hose is extended.

The invention discloses a trimming, flanging and side punching compound die which comprises an upper die and a lower die, wherein the upper die is provided with a trimming upper die, a flanging upper die and a side punching upper die; the lower die is provided with a nitrogen spring, a trimming lower die, a flanging lower die and a side punching lower die; the trimming upper die is provided with casting polyurethane, a pressing plate and an upper die trimming block; the trimming lower die is provided with a lower die trimming block and a cylinder ejection mechanism; the flanging upper die is provided with a concave die, a flanging block, a stripping mechanism, a stripping nitrogen cylinder, a pressing plate nitrogen cylinder, an upper die pressing plate and a hole flanging punch; the flanging lower die is provided with a convex die, a setting gage and a lower die pressing plate; and the side punching upper die is provided with a side punching punch, a polyester cyanamide pressing mechanism, a slide wedge and a roller wheel. By using the mode of the compound die, several processing procedures of trimming, flanging and side punching of workpieces made of metal plates can be completed through one set of die, once feeding is performed, the processing accuracy of the workpieces is high, the production efficiency is high, and the die cost is saved.

The invention relates to a nitrogen cylinder and its preparation method, in which, on the outside surface of the lining is bonded an adhesive layer and the outside surface of the adhesive layer is bonded to the inside surface of the inner structure layer of carbon fibre composite; the inside surface of the outer structure layer of Kevlar fibre composite is wound on the outside surface of the inner structure of the outer structure layer is wound an outer protective covering. The method consists in: coating an elastic adhesive layer on the outside surface of the lining; overlying a spiral and toroidal wound inner structure layer, an outer structure layer and an outer protective covering; curing and then getting the present inventive nitrogen cylinder.

A high-pressure in-situ infrared spectroscopy apparatus for monitoring a supercritical system on line comprises a high-pressure reaction kettle, a controller, an infrared spectrometer and a computer, a sample intake valve and a three-way gas-liquid valve of the high-pressure reaction kettle communicate with a high-pressure injection pump, the high-pressure reaction kettle communicates with a metering pump through the sample intake valve and the three-way gas-liquid valve, communicates with a nitrogen cylinder and a vacuum pump through an exhaust valve and a three-way nitrogen valve and communicates with a pressure sensor through a pipeline, a temperature-measuring thermocouple which is connected with the temperature indicator of the controller through a wire is arranged on the high-pressure reaction kettle, a heater and a temperature-controlling thermocouple which are connected with the temperature controller of the controller through wires are arranged on the high-pressure reaction kettle, the pressure sensor is connected with the pressure indicator of the controller through a wire, and the infrared spectrometer is connected with the computer through a wire. The high-pressure in-situ infrared spectroscopy apparatus also comprises an electromagnetic agitator, an emission bin and an optical fiber, the electromagnetic agitator is arranged under the high-pressure reaction kettle and connected with the speed regulator of the controller, the emission bin is arranged on the infrared spectrometer, and the optical fiber is connected with the emission bin and an infrared sensor inserted into the high-pressure reaction kettle.

The present invention is weld line shift controlling method and controller for laser plate-welding formation mainly used in forming car body coverage part. There are three weld line shift controlling methods including: stepped surface in formed part of combined hold-down ring and male mould resulting in enough hold-down force to reduce the shift of weld line; using the clamping force produced by the nitrogen cylinder to clamp weld line for less shift; and drawing ribs reasonably distributed in the material holding plane of the mold to control the deforming flow of side plates. The said methods can control the weld line shift and reduce break and crinkle in plate.