189 results about "Burst test" patented technology

Embossed fibrous structures that exhibit a Dry Burst of greater than 270 g as measured according to the Dry Burst Test Method and more particularly to embossed fibrous structures that exhibit a Dry Burst of greater than 270 g as measured according to the Dry Burst Test Method and a Total Dry Tensile of less than 2375 g/76.2 mm and/or a Geometric Mean Total Dry Tensile of less than 1130 g/76.2 mm as measured according to the Tensile Strength Test Method are provided.

The invention discloses a prediction method and device for brittleness of reservoir rock. The prediction method comprises the following steps: firstly, obtaining dynamic and static elastic parameters of core samples of the reservoir to be predicted and the mechanical parameters of the rocks through a static mechanical test, an ultrasonic test and a core bursting test, calculating the dynamic elastic parameters of the reservoir to be predicted according to prestack seismic inversion results, and further calculating the static elastic parameters of the reservoir to be predicted and the mechanical parameters of the rocks; then, building the relationship among the dynamic and static elastic parameters and the mechanical parameters of the rocks through a linear fitting method, further calculating the comprehensive brittleness indexes of the rocks, and predicting the brittleness of rock of the reservoir to be predicted through the comprehensive brittleness indexes. By adopting the prediction method and the device provided by the invention, rock brittleness of the tight reservoir can be described relatively truly.

In order to measure the performance of a DOCSIS upstream channel as well as to locate impairments, a special test signal is transmitted in a time slot of the upstream channel by a test instrument positioned anywhere within the CATV plant. A second test instrument, located at the termination point of the upstream plant, then detects, recovers, and processes the test signal in order to complete the measurement. The typical methods used to detect and recover bursted signals within a DOCSIS upstream channel use precise timing information transmitted in a corresponding DOCSIS downstream channel. Unfortunately, the downstream channel and thus the precise timing information are not always available to the secondary test instrument. The present invention also describes an apparatus and method for detecting a bursted test signal without the use of the DOCSIS upstream channel timing.

A steel pipe for an airbag inflator having a high strength of at least 900 MPa and preferably at least 1000 MPa in tensile strength along with a high toughness and exhibiting good resistance to bursting such that it has no propagation of cracks in a burst test at −40° C. or below is manufactured by quenching a pipe of a steel comprising, in mass %, C: 0.05-0.20 %, Si: 0.1-1.0 %, P: at most 0.025 %, S: at most 0.010 %, Cr: 0.05-1.45 %, Al: at most 0.10 %, and one or both of Ti and Mn satisfying Ti<0.02% and 0.4%≦Mn+40Ti≦1.2% from a temperature of at least the Ac₁ transformation point of the steel, tempering the pipe at a temperature lower than the Ac₁ transformation point, applying cold working to it with a reduction of area of at most 65%, and subjecting it to stress relief annealing at a temperature lower than the Ac₁ transformation point. The ratio L/T of the X-ray integrated intensity ratio of the {110} plane measured for the cross section perpendicular to the axial direction L of the steel pipe to that measured for the cross section perpendicular to the circumferential direction T is at most 50.

The testing method of high-temp. component creep life adopts the simulation pipe-bursting test machine or durable strength testing machine to make creep rupture acceleration simulation test of new materials which have different ageing extents and are not aged under the condition of a series of temp. and stresses. It adopts polynomical regressive analysis method to process data, and obtain the relationship formula of non-aged material between ageing factor, temp. and life time. By utilizing test, data processing and formula operation the material creep service life can be obtained.

The invention relates to a measurement and control system for a hydraulic test. A system control part is composed of a PLC (programmable logic controller) control cabinet, an industrial personal computer and a printer, a PLC is included in the PLC control cabinet, and the industrial personal computer is used as an upper computer of the PLC and connected with the PLC via a communication cable; a measurement and control pipeline part comprises a gas source supply pipeline, a gas-driving booster pump A, a gas-driving booster pump B, a liquid source supply pipeline, a high hydraulic output pipeline and a liquid unloading pipeline; and the PLC outputs a current control signal to the output end of an electric proportional valve, and the electric proportional valve controls gas pressure and gas flow rate by adjusting the position of a gas inlet valve according to the current control signal and a gas pressure signal which is output in proportion. The measurement and control system can performvarious pressure tests including an intensity test, a burst test for a safety relief device of a container, and a test for the residual deformation rate of the container; automatic control and manualcontrol in the hydraulic test for a fire-fighting product are independent from each other and can be used independently; pressure-boosting speed is adjustable, pressure change and dynamic curve output are detected in time; the measurement and control system is high in pressure control accuracy, small in volume, light in weight and low in energy consumption; multi-level pressure-boosting can be realized; and the measurement and control system has the characteristics of being high in reliability, high in accuracy, easy in operation etc.

The invention relates to a system and method for tunnel water-bursting test under high crustal stress-osmotic pressure. The system comprises a main box used for simulating excavation of a tunnel model, the main box is of integrated structure and placed on a base, two opposite sides of the base are fixed on two slide rails, and an n-shaped counter-force frame is arranged between the two slide rails. The bottom ends of two support legs of the counter-force frame are fixed detachably on the slide rails. The top beam of the counter-force frame is fixedly connected with the top end of a loading system. An information monitoring element is arranged in the main box, the loading system and the information monitoring element are connected with a monitoring and controlling system. The monitoring and controlling system controls the loading system to apply crustal stress and osmotic pressure to the model material in the main box.Research on tunnel water bursting under the condition of high crustal stress-osmotic pressure engineering excavation turbulence is realized, and actual needs of the engineering are met.Further, fully automatic control of operation is realized and experiment operation is greatly facilitated.

The invention relates to a high pressure hydrogen embrittlement structure test apparatus and a test method thereof. The test apparatus comprises a compressed air system, a hydrogen pipeline system and a data acquisition and control system, compressed air is used as a driving gas source to drive a gas booster, hydrogen is pressurized by the gas booster, the pressurized hydrogen is respectively conveyed to a test container or a clamping device through a pipeline, pressure-tight test is carried out after a predetermined test pressure is reached, or boosting is continuously carried out until a sample is exploded to realize the explosion test and determine its explosion pressure. The anti-hydrogen embrittlement performance test of a metal material can be completed through disc test, and the hydrogen embrittlement damage test of a structural member can also be completed through an object or a simulated container; and the high pressure hydrogen test environment with the highest pressure of 80MPa can be realized, unit operation can be adjusted and controlled by the test pressure, the dwelling time and other key test parameters, and the large range adjustment and the stable control of the boosting rate can completely meet hydrogen embrittlement related test requirements.

The disclosed device comprises: a gas dynamic system, a water-filling exhausting system to fill the pressure media into the high-pressure device rapidly and exhaust gas, a pressure up-down system for compression, holding and release; a detection control system to monitor and control whole process and output data, and a security protection system to protect when over pressure. This invention fit to different test and analysis with stable pressure and well reliability.

The invention relates to a pressure bursting test system and method for low-temperature deep-cooling pressure vessels and pipelines. The pressure bursting test system comprises a pressure bursting subsystem, a low-temperature deep-cooling environment subsystem, a vessel filling subsystem and a control subsystem, wherein the pressure bursting subsystem comprises a test medium storage device and a to-be-tested vessel which are mutually communicated, and the to-be-tested vessel is fixedly arranged in the low-temperature deep-cooling environmental box; a supporting device is arranged on the inner side of the to-be-tested vessel; the low-temperature deep-cooling environment subsystem comprises a low-temperature deep-cooling environmental box and a refrigerant storage tank which are mutually communicated; the vessel filling subsystem comprises an oil tank used for supplying oil for the to-be-tested vessel. The test system and method can conduct pressure test and bursting test of the pressure vessels in the low-temperature deep-cooling environment (from 269 DEG C below zero to zero DEG C) and test the strength, the airtightness and the bursting pressure of the pressure vessel in the low-temperature deep-cooling environment; by virtue of the measures of adding a filler into the vessel, recycling of both a refrigerant and a pressure medium and the like, the energy consumption is reduced to the utmost extent and the test cost is reduced.

The invention provides a transformer station intelligent electronic device multi-source anti-interference characteristic testing method. The testing method comprises a mixed power frequency magnetic field testing method and a mixed radio frequency radiation anti-interference degree testing method. The mixed power frequency magnetic testing method is characterized in that during the power frequency magnetic field test, the surge test and the static test can be carried out; during the power frequency magnetic field test, the electrical fast transient burst test and the static test can be carried out; during the power frequency magnetic field test, the voltage dip test and the static test can be carried out. The mixed radio frequency radiation anti-interference degree testing method is characterized in that during the radio frequency anti-interference degree test, the surge test and the static test can be carried out; during the radio frequency radiation anti-interference degree test, the electrical fast transient burst test and the static test can be carried out; during the radio frequency anti-interference degree test, the voltage dip test and the static test can be carried out. The method provided by the invention is capable of simulating a plurality of interference ways, which are applied to the intelligent electronic devices at the same time, and then the anti-interference degree can be tested, and the acquired testing result can be used to reflect the actual condition, and therefore the credibility and the authority of the anti-interference degree test can be improved greatly.

A steel pipe for an air bag inflator which has a high strength of a tensile strength of 900 MPa or more, preferably 1000 MPa or more, together with high toughness, and exhibits good burst resistance wherein no cracks develop in a burst test at -40 DEG C or lower is produced by a method comprising providing a raw steel pipe containing, in mass %, 0.05 to 0.20 % of C, 0.1 to 1.0 % of Si, 0.025 % or lower of P, 0.010 % or lower of S, 0.05 to 1.45 % of Cr, 0.10 % or less of Al, 0.02 % or less of Ti, and one or both of Ti and Mn satisfying 0.4 = Mn + 40 X Ti = 1.2, rapidly cooling the raw steel pipe from a temperature of Ac1 transformation temperature or higher, tempering the resultant steel pipe at a temperature lower than Ac1 transformation temperature, subjecting the tempered steel pipe to a cold working wherein a reduction of area is 65 % or less, and then subjecting the worked steel pipe to a stress relief annealing at a temperature lower than Ac1 transformation temperature. The L/T ratio of X ray integral intensity ratios of {110} face measured in the cross section perpendicular to the axis direction (L) and the cross section perpendicular to the periphery direction (T) of the above steel pipe is 50 or lass.

The invention discloses a multi-work station ball valve blasting testing machine which belongs to the field of testing device. The testing machine comprises a testing host and a control cabinet. The testing host is divided into two layers; a testing table is arranged on the upper layer and a machine base is arranged on the lower layers. The testing table is provided with 3 to 10 testing work stations which are arranged in parallel and which can simultaneously test the pressure and blasting performance of 1 to 10 ball valves. In the test, hydraulic oil uses a solenoid directional control valve to push each piston; the compression rod of each piston can rise simultaneously; a special sealing fixture is used for sealing and clamping two ends of the ball valve. A hydraulic test pump is used for pouring the testing medium into the tested ball valve and boosting the pressure of the tested ball valve so as to test the ball valve. The testing machine can simultaneously seal, clamp, pour the testing medium into and test a plurality of ball valves. In the whole test process, a computer is used for automatically controlling the test through a PLC controller. And the testing machine has the advantages of stable performance, high work efficiency, low labor intensity, simple structure, high security, and so on.

The present invention relates to material test machine technology and is one geotextile strength test machine and its application. The test machine includes crossbeam, driving mechanism, test head, sensor module, microcomputerized controller, display, portal and pedestal. The upper holder for testing tensile strength and tear strength is set on the portal, and the lower holder is set on the crossbeam. The crossbeam with ends connected to the driving mechanism may be shifted inside the portal, and the test head and the sensor module are set on the crossbeam and connected together. There is elevated clamping unit set on the pedestal. The test head may be one of the CBR bursting test head, spherical bursting test head, piercing test head, plate material pressing test head and plate material breaking test head. The present invention may be used in complete various test jobs.

The invention belongs to the technical field of structural strength of aviation and aerospace and specifically relates to a low-temperature pipeline high-pressure burst testing device. The device comprises a filling system and a pressurizing system, wherein the filling system comprises a stainless steel flexible pipe S2 with the through diameter of 20mm, a low-temperature pipeline, a stainless steel flexible pipe S1 with the through diameter of 20mm, a manual valve F1 and a liquid nitrogen tank which are connected with one another sequentially, S1 is a filling pipe and S2 is an exhaust pipe; the pressurizing system comprises a pressure sensor D1, a stainless steel flexible pipe L1 with the through diameter of 10mm, the manual valve F1, the stainless steel flexible pipe S1 with the through diameter of 20mm, the low-temperature pipeline, the stainless steel flexible pipe S2 with the through diameter of 20mm, a stainless steel flexible pipe L2 with the through diameter of 10mm, a rubber flexible pipe J1 with the through diameter of 10mm, a manual valve F2 and a nitrogen bottle which are connected with one another sequentially. The low-temperature pipeline high-pressure burst testing device provided by the invention can apply a high-pressure load to the pipeline filled with a low-temperature medium, thereby obtaining a real stress state and a carrying limit of the low-temperature pipeline through a testing means.

The invention discloses a device for a wireless remote control tire burst test, comprising a wheel. A wheel hub is provided with a deflation port, a deflation tube is welded at the deflation port, and the deflation tube is provided with an electromagnetic valve; and the electromagnetic valve supplies power through a direct current power source, and the on-off of the magnetic valve is controlled through a wireless remote control switch. The device is additionally provided with an accessory device on a tire wheel hub of a conventional automobile and uses the electromagnetic valve as a control unit to deflate the tire so as to achieve the test effect same as the tire burst without damaging the tire, thereby saving the cost and being favorable for repeated tests. Because the wireless remote control switch remotely controls the electromagnetic valve, the burstiness of the test is increased so that the device is particularly suitable for training drivers in special industries.

The invention provides a bursting device. The bursting device comprises a test table, a support arranged on the test table and a base arranged on the test table. The bursting device further comprises a bursting clamping head, a stress and strain sensor connected with the bursting clamping head, a high speed photometer, a hydraulic servo motor, a stabbing cone and a jig. The hydraulic servo motor is connected with the bursting clamping head, and the bursting clamping head is connected with the stabbing cone. Such design significantly improves the fastness of clamping of textile/textile structure reinforced flexible composite material to be tested, reduces the relative slippage between a sample to be tested and the jip, reduces pulling-out of yarn from the textile structure, and improves the accuracy and reliability of a bursting test.

The invention relates to the field of development of material mechanical property testing devices, and aims at providing a multifunctional pressure difference type method for testing the compatibility of high-pressure hydrogen and materials. The method includes a bursting test method, a variable-hydrogen-pressure fatigue test method and a constant-hydrogen-pressure fatigue test method. By means of the method for applying loads on a disc sample through the pressure difference of the upper surface and the lower surface of the disc sample, complex servo test mechanisms are avoided, the device size is greatly reduced, the device input is reduced, operation is easy and convenient, and the test efficiency is improved; in the test process, parameters such as strain and displacement of the disc sample can be conveniently measured, and corresponding tested elements are not influenced by high-pressure hydrogen.