97results about How to "Experimental accuracy" patented technology

The invention discloses an experimental method for measuring distribution of breaking longitudinal force of a steel rail of a railway, relates to the technical field of security detection for railways, and particularly relates to an experimental method for measuring a distribution law of breaking longitudinal force of a steel rail of a railway. The experimental method is characterized in that change of the state of the rail steel is simulated when the rail steel is broken by means of applying prestress on the steel rail and then releasing the prestress, and the distribution of the longitudinal force of the steel rail before and after the prestress is released is measured by a force sensor group to obtain the distribution law of the breaking longitudinal force of the steel rail. The experimental method includes mounting the force sensor group on the long steel rail of a track with a certain length at first; completely releasing fasteners of the long steel rail; applying the certain prestress on the long steel rail by a steel rail stretching machine; locking the fasteners of the long steel rail; finally releasing the prestress; acquiring stress data of the steel rail by a sensing node group and the force sensor group; and transmitting the data to a computer by a wireless gateway to obtain the distribution law of the longitudinal force after the steel rail is broken. By the aid of the method, accurate, controllable and low-cost experiment for distribution of the breaking longitudinal force of the steel rail can be realized.

The invention relates to a buoyancy experimental device and method for physics teaching. Experimental equipment for studying the magnitude of buoyancy in middle school physics is quite simple, operating is quite troublesome, visuality is bad, no experimental method is given clearly, a demonstrative experiment and a grouping experiment cannot be well completed, and the teaching effect is poor. The bottom ends of supporting rods are connected with an adjustable base, and the top ends of the supporting rods are connected with an adjusting device. The adjusting device is connected with weights, water tanks are placed under the weights, and the water tanks are filled with water or solutions. An overflowing opening is formed in the upper edge of each water tank, and a square cup is placed under each overflowing opening. The buoyancy experimental device and method are used for buoyancy experiments in physics teaching.

The invention relates to a flow diversion chamber capable of testing the flow diversion capacity of a fracture network of a tight reservoir by gas. The flow diversion chamber can be blended with an API (American Petroleum Institute) flow diversion capacity tester, so that the cost is reduced; rocks such as an actual formation shale or tight sandstone are used for realistically simulating the formation lithology, the damage to the flow diversion capacity by the embedment of a propping agent is considered, and the fracture width and the fracture network structure are changeable; the flow type of the flow diversion chamber is radial flow but not linear flow, whether a test medium passes through all fractures in the fracture network or not cannot be ensured by the linear flow, the spread range of the test medium can be increased by the radial flow, and the accuracy of testing the flow diversion capacity can be increased.

The invention belongs to the field of development of oil and gas wells, and relates to a wellhead sampling device, in particular to a wellhead sampler designed for the characteristic of gas field environment containing high content of H2S/CO2, and a sampling system thereof. The sampling device comprises a sampling valve, a sampling bottle and a pressure reducing valve, wherein two ends of the sampling bottle are in threaded connection with the sampling valve; the external connection of the sampling valve is external-thread clamping sleeve type connection; the pressure reducing valve is used for carrying out pressure reduction and sample injection on high-pressure gas in the sampling bottle; the pressure reducing valve comprises an outer conveying sample injection port which is connected with an outer detector; and the outer conveying sample injection port is a clamping sleeve type connection port so as to eliminate dead angles of pipelines. In the invention, the field sampling for analysis is achieved, the result of experimental analysis has good consistency, the device is safe and reliable, and the corrosion resistance to H2S/CO2 is strong. In the gas field sampler disclosed by the invention, the sampling process is safer, the experimental process is more precise and faster, the applicable pressure range is wider, and more safety is achieved.

The invention relates to a test method for detecting flexural rigidity and energy absorbing properties of automotive parts and a test device for detecting flexural rigidity and energy absorbing properties of the automotive parts. The test device comprises a hammerhead device on an upper end of the test device, a B-column clamp device and a guide rail device on a bottom of the test device, wherein the hammerhead device comprises a hammerhead guide rail (2), a T-shaped groove (2-1) of the hammerhead guide rail, first bolts (4), upper fixing nuts (3), lower fixing nuts (5), a hammerhead (6) and a force sensor (14); the B-column clamp device comprises a bracket (9), a connecting column (8), and a location pin (7); the guide rail device comprises a ground guide rail (10), a ground guide rail groove (10-1), fastening nuts (11), and second bolts (12); the B-column four-point bending quasi-static test device can be freely and easily installed on a pressure machine. The B-column clamp part of the test device can be adjusted according to the shape and dimension of the B column, thus the test device is high in flexibility and freely moved on the guide rail according to the spatial position of the B column.

The invention discloses an auxiliary dissolving device for a chemical experiment. The auxiliary dissolving device comprises a dissolving cup, a grinding pot and a dissolving device, wherein an upper cover covers the upper end of the dissolving cup; a water feeding pipe is arranged at the right side of the upper end of the dissolving cup; the grinding pot is arranged at the top of the dissolving cup; the dissolving cup is provided with a placement cavity in a manner of being matched with the grinding pot; a top plate penetrating through the dissolving cup is arranged on the placement cavity; anannular limiting convex edge is arranged at the inner side of an opening formed in the lower end of the placement cavity; the grinding pot is composed of a closing cover and a pot body; the dissolving device is arranged in the dissolving cup. The auxiliary dissolving device for the chemical experiment, disclosed by the invention, has the advantages of large stirring range, good dissolving effectand high dissolving efficiency, and the experiment is carried out accurately.

The invention discloses an anti-radiation fabric which comprises a detection box. Rotating space is arranged in the front end surface of the detection box, the front end wall of the rotating space iscommunicated with outside space, detection space communicated with the rotating space is arranged in the rear end wall of the rotating space, a clamping mechanism is arranged in the left end wall of the detection space, clamping mechanisms centrally symmetric about the detection space are arranged in the right end wall of the detection space, an electromagnetism mechanism is arranged in a second clamping block, a transmission mechanism is arranged in the end wall, far away from the detection space, of a clamping groove, and a driven mechanism is arranged in the rear end wall of the clamping groove. The detection box is simple in structure and simple and convenient to operate, the structure of the detection box is simplified, cost is low, size is small, so that the detection box is conveniently carried, the anti-radiation performance of the fabric can be accurately detected, the detection accuracy of the anti-radiation performance of the fabric is improved, and the qualified rate of thefabric is ensured.

The invention discloses a crude oil automatic sampling and moisture content determining instrument. The determining instrument comprises an automatic sampling part and a distillation device; the automatic sampling part comprises a circulating pump, a sampler and a bypass oil pipe; the bypass oil pipe communicates with a main oil pipe through an oil inlet and an oil return port, and the oil inlet, the circulating pump, a filter, the sampler and the oil return port successively communicate with one another through the bypass oil pipe; the sampler is provided with a sampling pump; the sampling pump communicates with the bypass oil pipe and also communicates to a sampling container; the bottom of the sampling container is provided with a first motor-operated switch; the sampling container communicates to the distillation device through an oil discharge pipe; the distillation device is provided with an oil return pipe; the oil return pipe communicates with the bypass oil pipe; the distillation device is also provided with a measuring device; the circulating pump, the sampling pump, the distillation device, the measuring device and the first motor-operated switch are electrically connected to a controller. The determining instrument can automatically sample and measure the moisture content through a distillation method, achieves full-automatic integration of sampling and measurement, has no human factor error, and has the effect of high measuring accuracy.

The invention provides a shearing box, comprising at least two bases arranged on different vibrating tables, and laminated box bodies which are placed on the bases and are formed by overlapping framesprovided with openings at the side edges; every two adjacent bases are connected with each other by means of a bearing plate, one end of the bearing plate is fixed, and the other end of the bearing plate is movable; every two adjacent frames, which are positioned on the different laminated box bodies and are arranged on the same horizontal plane, are connected with each other by means of a universal coupling; openings of the adjacent laminated box bodies are connected with each other by means of a baffle plate so as to form a communicated container; all the laminated box bodies are respectively provided with limiting components, so that the soil in the shearing box can be subjected to different excitation; furthermore, the seismic ground motions of the bases are relatively independent, but can be mutually propagated; the laminated box bodies are communicated with one another, and the soil can be placed at the communicating parts; the vibration is propagated through the soil medium, sothat the constitutive property that the frame structure of the shearing box is perpendicular to the vibration direction is met; furthermore, the structure can rotate along multiple directions, the real situation of the interaction between the soil and the underground structure under multi-point excitation is simulated, the experiment is accurate.

The invention relates to the field of geothermal tail water recharge, in particular to an indoor simulation soil column experiment device under a geothermal tail water sandstone recharge condition. The device comprises a water supply structure, a soil column pipe and a solution collection structure; the soil column pipe is connected with the water supply structure and the solution collection structure, and a constant temperature water bath structure is arranged on the outer circumference of the soil column pipe. The constant temperature water bath structure is used for keeping the temperatureof the soil column pipe within a set range; a pressure measuring hole and a sampling port are formed in the soil column pipe at intervals, the pressure measuring hole is connected with a pressure measuring structure used for measuring water pressure, the sampling port is connected with a sampler, and the sampling port is communicated with an inner cavity of the soil column pipe. The invention hasthe beneficial effects that the overall structure is simple, and sampling is convenient; and the arranged constant-temperature water bath structure simulates the temperature environment under the geothermal tail water sandstone recharge condition, condition parameters for simulating a soil column experiment are increased, and the experiment is more real and accurate.

The invention provides a hobbing cutter holder system loading running-in performance testing device which comprises a cutter holder used for fixedly installing a cutter shaft, and a hobbing cutter is arranged on the cutter shaft; the running-in device is provided with a transmission shaft, the transmission shaft is driven by a motor, a running-in contact seat is coaxially arranged on the transmission shaft, a running-in groove is formed in the running-in contact seat, the shape of the running-in groove corresponds to the contour shape of a cutter ring of the hobbing cutter, and the running-in groove is used for being attached to the cutter ring of the hobbing cutter; the vertical force loading device is connected with the transmission shaft and is used for adjusting the vertical force applied by the running-in groove to the hob ring of the hob; the lateral force device is connected with one side of the running-in contact seat, and lateral force is used for adjusting the magnitude of lateral force applied to a hob ring of the hob by the running-in groove; the rotating speed monitoring device is used for monitoring the rotating speed of the running-in groove and the rotating speed of the hob ring of the hob; the invention further provides a hobbing cutter holder system loading running-in performance testing method.

The invention relates to an intelligent mercurial thermometer which comprises a long-strip-shaped mercurial thermometer body. A capillary tube extending in the longitudinal direction is arranged in the mercurial thermometer body and is communicated with a glass bulb which is located at the lower end of the mercurial thermometer body and used for containing mercury. A first wire extending in the longitudinal direction of the mercurial thermometer body is arranged in the mercurial thermometer body. The lower end of the first wire extends into the inner wall of the glass bulb and makes contact with the mercury contained in the glass bulb. The inner wall of capillary tube is provided with a second wire extending in the longitudinal direction of the capillary tube. The lower end of the second wire makes contact with the mercury, and the second wire is exposed on the inner wall of the capillary tube. The upper end of the first wire and the upper end of the second wire extend out of the mercurial thermometer body. The extended end of the first wire is electrically connected with one output end of a DC power supply. The extended end of the second wire is electrically connected with the other output end of the DC power supply through a current information processor. The intelligent mercurial thermometer can be used for visually and accurately displaying the real-time temperature in a digital mode, is high in efficiency and accuracy, and avoids personal errors.

The invention discloses a concrete electric pole mechanical property detection system and a concrete electric pole mechanical property detection method. The system comprises a testing platform, wherein the testing platform comprises a horizontal platform which is arranged horizontally; a first fixing support base is arranged at the front part of the horizontal platform; the first fixing support base is arranged close to the front end of the horizontal platform; a theodolite is arranged on the outer side of the first fixing support base; a second fixing support base is arranged at the rear part of the horizontal platform; the second fixing support base is arranged close to the tail end of the horizontal platform; an inclined platform of which the tail end is inclined downwards is connected with the tail end of the horizontal platform; a guide wheel is rotationally arranged on the lower surface of the rear part of the inclined platform; a steel wire rope is wound on the guide wheel; an external force loading part is connected with the front part of the steel wire rope; a load meter is connected with the rear part of the steel wire rope; the front end of the steel wire rope is connected with the front part of the horizontal platform; and a hoop is connected with the rear end of the steel wire rope. According to the concrete electric pole mechanical property detection system, the structure is simple, the deflection value of a concrete electric pole is confirmed, and meanwhile the testing platform is convenient to move and can be moved by users according to demands.

The invention discloses a device and a method for testing combustion characteristics of a material in a low-pressure oxygen-enriched environment. The device comprises a low-pressure cabin body, an ignition device, a weighing device, an oxygenation system, an exhaust system, a closed-loop pressure control system and an online flue gas detection and analysis system, wherein the closed-loop pressure control system annularly sleeves the bottom of the low-pressure cabin body, the closed-loop pressure control system is connected with the oxygenation system, the low-pressure cabin body is respectively connected with the closed-loop pressure control system and the exhaust system, the weighing device is arranged in the low-pressure cabin body, an area above the weighing device is a reaction area, the ignition device extends into the internal reaction area from the outside of the low-pressure cabin body through an ignition rod, and the online flue gas detection and analysis system is connected with the low-pressure cabin body. By means of the device, the combustion characteristics of the material in the low-pressure oxygen-enriched environment can be efficiently and accurately experimented and analyzed, and pressure at different altitudes can be simulated.

The invention discloses a standard Vicat device for automatically measuring the setting time and an operation method thereof. The standard Vicat device comprises an operation box, a setting time display, an infrared light emitter, an infrared light receiver and a test mold, wherein the test mold is arranged on the operation box; a test needle is arranged above the test mold and is connected with the setting time display; the infrared light emitter and the infrared light receiver are arranged on two sides of the test needle; the infrared light emitter, the infrared light receiver and the test needle are positioned on a same plane; photo-diodes are arranged on the infrared light receiver; and the infrared light emitter is movable and can drive the photo-diodes to generate a current change. The standard Vicat device for automatically measuring the setting time and the operation method thereof, disclosed by the invention, have the benefits that the infrared light emitter, the infrared light receiver and other photoelectric converters can be used for photoelectric conversion; through a change in current magnitude, a timer automatically times and accurately reads the setting time withoutsite timing; the artificial interference in a laboratory temperature field and other environmental factors is also reduced; the operation is simple and quick, and the measurement precision is high.