49results about How to "Reliable test method" patented technology

This invention discloses a chemical erosion rock crack whole process three-axis accurate mechanics test apparatus, which comprises box 2, a pair of load axis 2, water mouth 3, supercharger 4, stainless steel tube 5, and exhaust valve 6. It is characterized by the following: to fix an exhaust valve on the other side of transparent material of box; the exhaust valve is near to the box top as possible; to fix water mouth connected with supercharger through stainless steel tube.

The invention discloses a mesomechanics testing system of gas-containing coal rocks, which comprises a transparent sight glass that is fixed at an opening position of a testing cavity, a three-dimensional moving microscopic observing frame that is arranged outside the transparent sight glass, and a stereoscopic microscope and a CCD camera that are arranged on the three-dimensional moving microscopic observing frame; an inner end of a measuring conducting wire is connected with an acoustic emission sensor, and an outer end of the measuring conducting wire is connected with an acoustic emissionmagnifier and an acoustic emission card; the testing cavity is communicated with a gas pipe through a multi-purpose air vent, and the gas pipe is divided into two paths with one path connected with ahigh-pressure gas bottle and the other path connected with a vacuum pump; a cushion block, a limit pressure head and a loading head are arranged inside the testing cavity, a vertical surface of an L-shaped nick of the cushion block is over against the limit pressure head, and a transverse surface of the L-shaped nick of the cushion block is over against the loading head. The mesomechanics testingsystem of the gas-containing coal rocks provides more complete and reliable test methods for revealing the micro-structural damage law of the coal rocks under the gas action, further and deeper finding out the physical and mechanical properties of the gas-containing coal rocks, scientifically revealing the occurrence mechanism of the dynamic phenomenon of the coal rocks, and developing corresponding disaster prevention techniques.

The invention discloses a tunnel boring machine two-dimensional loading analog test device. A spherical pad used by the device is connected with a common cross beam of a pressure machine through bolts, two ends of the vertical loading tension transfer column of an installment axis type loading sensor are separately provided with the spherical pad and a cutter holder, cutters are fixed on the cutter holder though bolts, two left and right ends of a loading holder are separately provided with displacement sensors, the displacement sensors and axis type loading sensor are connected with a computer through a data sampling apparatus; a horizontal lifting jack is fixed with a left lateral plate through bolts, a horizontal loading tension transfer column is fixed on the left side of a right lateral plate, four draw bars are used to connect the right lateral plate and the left lateral plate, the piston ends of the horizontal loading tension transfer column and the horizontal lifting jack are separately provided with a test piece right bearing plate and a test piece left bearing plate; and a high speed CCD camera is mounted at the front of a test piece and is connected with a computer through a data line. The device has simple structure, convenient operation, low cost, rich test data, complete test result and high reliability and is easy to process.

The present invention disclosed a stress-water flow-chemical coupled rock breaking process fine observation mechanical loading system. Said system is formed from servo control system, U-type rigid loading platform, movable support, mobile support, 3-D video micro-digital recording system, two monitors, video distributor, two digital cameras and two CCD cameras.

The invention discloses a method for detecting the pre-lithium content of a pole piece, which comprises the following steps: covering the pole lugs on the pole piece with a PET film, performing lithium plating treatment on the PET film and the pole piece at the same time, and then intercepting the PET film and mixing it with a strong acid and Dilute with water and prepare the solution to be tested, detect the concentration of lithium element in the solution to be tested; finally calculate the pre-lithium layer thickness d=C*V / (ρ*S) on the pole piece, where C is the concentration of lithium element in the solution to be tested Concentration, the unit is μg / mL; V is the volume of the solution to be tested, the unit is mL; S is the area of ​​the intercepted PET film, the unit is mm 2 ; ρ is the density of lithium=0.534g / cm 3 . The invention can sample at a fixed point, and the method is simple to operate and has high measurement accuracy, and can accurately measure the pre-lithium amount at a designated position.

The invention discloses a method for detecting the amount of pre-lithiation of a pre-lithiation film, comprising: preparing a negative pole piece, a pre-lithiation film and an aluminum foil; the ratio of the area of ​​the aluminum foil to the area of ​​the pre-lithiation film is 0.5-1; The ratio of the area of ​​the sheet to the area of ​​the pre-lithiated film is 0.5-1; the pre-lithiated film includes a base film of 1um-50um and a pre-lithiated layer of 0.02um-100um coated on the base film; The prepared negative pole piece, pre-lithiated film and aluminum foil are assembled into a button battery; wherein, the pre-lithiated layer is assembled towards the aluminum foil side; the button battery is static, and the static time is 8-32 hours ; Button cell at 1uA / cm 2 -1mA / cm 2 Discharge treatment is carried out under the discharge current density, and the discharge cut-off voltage is between 4.2V-4.7V; read the discharge capacity, and calculate the pre-lithiation amount of the pre-lithiation film.

The invention discloses a method for simulating the mechanical properties of gas-containing coal rock under uniaxial compression. The experimental device used includes a coal sample container, a stress loading system, a gas filling system, a gas detector, and a VIC‑3D non-contact full-field strain test method. Measuring system and acoustic emission system; the coal sample container includes a coal sample container shell and a coal sample placement chamber, the top of the coal sample container shell is sealed and connected with a piston, and one side of the coal sample container shell is provided with a first multi-purpose air hole, The other side is provided with a second multi-purpose air hole and a transparent viewing mirror; the stress loading system includes an electronic universal testing machine and a first computer; the experimental method includes steps: 1. Sample preparation; 2. Building a test device; 4. Test in a gas-free environment; 5. Test in a gas-filled environment. The invention is reasonable in design, convenient in realization and complete in function, can truly reflect that the coal pillar left underground is under one-way load, has strong practicability, and is convenient for popularization and use.

The invention belongs to the technical field of hydraulic transmission and control and particularly relates to a control system and a control method for an opening and closing type pump test. An input end of a booster pump of the system is connected with a pool. An output end is connected with an input end of an electromagnetic flowmeter B. An output end of the electromagnetic flowmeter B is connected with a water supplying opening of a water storage tank and the input end of the electromagnetic flowmeter B is further connected with the pool. A liquid level transmitter is arranged at the top of the water storage tank. A vacuum pump is connected with a vacuum opening of the water storage tank. An air compressor is connected with a booster opening of the water storage tank. An inlet of the water storage tank is connected with an outlet of an electric three-way valve. An outlet of the water storage tank is connected with an input end of a testing pump. An output end of the testing pump is connected with an input end of an electromagnetic flowmeter A. An output end of the electromagnetic A is connected with an operation end of the electric three-way valve. A water discharging end of the electric three-way valve is connected with the pool. According to the system, a cavitation test is performed to a tested pump on the condition of opening or closing and equal liquid level control is performed to liquid in the water storage tank on the condition of opening so that smooth completion of the cavitation test is guaranteed.