2922 results about "Strength testing" patented technology

The invention relates to the technical field of strength detection, and discloses radiator strength detection equipment and a detection method. The method comprises the following steps: carrying out adaptive wavelet denoising and structural association mapping on collected multi-scale structural feature data and multi-environment coupling material feature data of a radiator to be detected, and carrying out multi-dimensional feature extraction, space-time alignment and interactive mapping on an obtained fusion data set to obtain a multi-physical field coupling data matrix; carrying out physical field control equation set separation iteration solution and heat dissipation cyclic load and environmental action calculation on the coupling data matrix to obtain a damage evolution state; and performing multi-dimensional damage sensitive area identification based on the damage evolution state, generating a risk distribution map, performing failure comparison and life calculation based on historical failure data of the same type of radiators, and generating an intensity comprehensive detection result. Through multi-physical field coupling analysis and multi-dimensional damage evaluation, accurate detection of the strength state of the radiator is realized, and the accuracy of structural reliability evaluation is improved.

The invention relates to the technical field of basalt fiber mesh detection, in particular to basalt fiber composite rib mesh strength testing equipment and method.The basalt fiber composite rib mesh strength testing equipment comprises a supporting table and a movable groove formed in the top of the supporting table, and a longitudinal stretching mechanism located above the movable groove is installed at the top of the supporting table; a transverse stretching mechanism is installed in the movable groove in a front-back sliding mode, a movement adjusting mechanism for driving the transverse stretching mechanism to move front and back is installed in the supporting table, and an angle positioning mechanism is installed at the front end of the longitudinal stretching mechanism. The mesh material is detected through cooperation of the longitudinal stretching mechanism, the transverse stretching mechanism and the movement adjusting mechanism, the longitudinal stretching mechanism is used for longitudinally stretching the mesh material, and the transverse stretching mechanism is used for transversely stretching the mesh material, so that stretching resistance detection is carried out in the warp direction and the weft direction of the mesh material; and the tensile property of the mesh material when the mesh material is simultaneously subjected to transverse and longitudinal tensile forces can be conveniently measured.

The invention provides a solid waste filling material ratio optimization method of a magnesium slag-steel slag composite cementing material, and relates to the technical field of solid waste filling. The method comprises the following steps: mixing magnesium slag, steel slag, desulfurized gypsum and mineral slag to prepare a cementing material, and carrying out pretreatment and physicochemical property analysis on raw materials by taking tailings and waste rocks as filling aggregates; then designing a cementing material proportioning scheme and carrying out strength test to obtain an optimal ratio of the cementing material; then considering different slurry concentrations and plastic-to-bone ratios, and carrying out an all-solid waste filling slurry rheological test and an all-solid waste cementitious body strength test; and finally, according to the two test results, establishing a multi-objective optimization model taking the on-way resistance and the filling material cost as optimization objectives and taking the strengths of cementitious bodies at different ages as constraint conditions, and determining optimal parameters of the full-solid waste filling material. According to the invention, resource utilization of the metallurgical solid waste and the mine solid waste is realized, the bottlenecks of high carbon emission and high cost of a cement-based filling material are broken through, and a solution is provided for co-processing of the mine solid waste.

The invention relates to the technical field of textile tension tensile test, in particular to a tensile degree detection mechanism for textile processing, comprising: a positioning base; a closed machining rack is assembled on the positioning base in an annular angle adjusting mode, and a stretching annular transmission structure and a longitudinal clamping stretching structure are symmetrically assembled along the middle of the inner side of the closed machining rack. The stretching annular transmission structure is matched with the longitudinal clamping stretching structure to carry out stretching detection on the cut textile; the device has a dynamic stretching test function, a servo motor drives a worm, a worm gear, a nut and a screw to perform spiral transmission, so that the clamping plate frames clamping textile cloth are far away from each other to perform stretching test, and a stretching annular transmission structure is matched with the servo motor rotating in the opposite direction to realize twisting stretching test on the textile cloth; more complex stress conditions are simulated, and the equipped monitoring camera is used for carrying out visual picture recording on textile cloth in a stretching test, so that a basis for real-time test monitoring and subsequent analysis is provided.

The invention relates to the field of steel wire strength testing, in particular to a tire steel wire ring strength inspection device, a tensile testing machine is provided with two multifunctional clamping jaw devices which are distributed up and down, and each multifunctional clamping jaw device comprises a double-layer support body, a driving air cylinder, two clamping fingers, a winding assembly and a pressing assembly. The opposite sides of the two clamping fingers are both in shaft connection with T-shaped pressing wheels, a transmission mechanism is arranged between an output shaft of the driving air cylinder and the two clamping fingers, the winding assembly comprises an anti-skid rubber wheel used for driving the two T-shaped pressing wheels to rotate synchronously, the pressing assembly comprises an arc-shaped pressing plate used for being tightly attached to the side walls of the T-shaped pressing wheels, and the anti-skid rubber wheel is used for driving the two T-shaped pressing wheels to rotate synchronously. A traditional direct clamping mode is replaced by a coiling mode, the situation that a clamping part is broken due to the fact that local stress is excessively concentrated in a traditional clamping testing mode is greatly avoided, the defect that the stress of the steel wire is concentrated in the traditional clamping mode is effectively overcome, and the testing result is more accurate and reliable.

The invention relates to the technical field of window opener chains, in particular to a window opener chain strength testing device based on electric window opener production and a testing method.The window opener chain strength testing device comprises a frame and a testing window opener, a simulation window is arranged on one side of the frame, and the top of the simulation window is fixedly connected with a rotating shaft rotationally connected with the frame; a window opener chain is mounted in the test window opener, one end of the window opener chain is fixedly connected with the simulation window through a connecting seat, a mounting cylinder is arranged in the frame, the outer surface of the mounting cylinder is in sliding connection with a rotating ring, one end of the rotating ring is fixedly connected with a pull handle rotationally connected with the simulation window, and the other end of the rotating ring is fixedly connected with the test window opener. A mounting cylinder is arranged in the frame, a resistance assembly is arranged in the mounting cylinder, a straight plate is arranged on one side of the frame, a pressure applying plate for applying resistance to the simulation window is arranged at the bottom of the straight plate, sliding seats are slidably connected to the two ends of the frame, and pressure assemblies acting on the straight plate are arranged on one sides of the two sliding seats.

The invention relates to the technical field of concrete detection, in particular to precast concrete strength detection equipment which comprises a detection table, the top end of the detection table is fixedly connected with a portal frame, the top end of the portal frame is provided with a hydraulic cylinder, and the driving end of the hydraulic cylinder is fixedly connected with a pressure detection plate. A positioning assembly is arranged in the detection table, a cleaning assembly is arranged in the placing groove, and an air blowing assembly is arranged on the upper portion of the cleaning assembly. Compared with the prior art, the protection assembly is arranged on the periphery of the containing groove, the protection assembly can be driven to be unfolded in the downward moving process of the pressure detection plate, a first rack can be used for driving a first gear to rotate while the side edges move towards the two sides, and then a turning plate can be driven to turn over, so that the side plates and the turning plate surround the periphery of the containing groove to form a baffle; and the protection effect is achieved, fragments which are broken and splashed in the detection process of the concrete prefabricated part can be blocked, and the safety in the detection process is improved.

The invention discloses a multi-linkage combined load synchronous application strength testing device. The technical problems that in the prior art, the load applying mode is single, and the combined load cannot be synchronously applied are solved. The device comprises a connecting mechanism and a load applying mechanism, wherein the load applying mechanism comprises a torsional load applying structure, a load transmitting structure and a multi-linkage testing structure. The load transmission structure comprises a special-shaped stress plate and a torsional load transmission assembly, and the torsional load transmission assembly comprises a connecting chuck and a torque plug-in. By controlling the rotation of the torsion load transmission assembly, a pure torsion load applying mode or a conversion mode of converting torsion motion into radial load can be selectively realized, and multi-directional load detection is realized. The invention further provides a combined load synchronous applying function, the single driving source synchronously activates the torsion load path and the radial load path by adjusting the geometric positions of the torque plug-in and the load adjusting plate on the connecting chuck, and synchronous applying of the torsion load and the radial load is achieved.

The invention relates to the technical field of pipe bracket testing, in particular to a thermal insulation pipe bracket overall strength displacement overload testing device and method.The thermal insulation pipe bracket overall strength displacement overload testing device comprises a bearing base and further comprises a pipe bracket base arranged on the upper side of the bearing base, a connecting pipe bracket is installed at the upper end of the pipe bracket base, a clamping plate is clamped to the upper side of the bearing base, and a rotating shaft is arranged on the clamping plate in a penetrating mode; the bottom end of the rotating shaft is clamped and connected with a connecting gear, and an annular groove is formed in the edge of the upper side of the bearing base. According to the invention, the axial and radial strength of the pipe bracket can be tested in the displacement overload test process, the use limitation is low, the automation degree is high, the test efficiency of the heat insulation pipe bracket is obviously improved, the situation that the pipe bracket is broken to injure people due to broken objects in the displacement overload test process of the pipe bracket can be avoided, and the test efficiency is improved. The displacement overload test structure has a good safety protection function, is high in use safety, and also realizes a step-by-step disassembly function of the displacement overload test structure, so that barrier-free maintenance of the test structure is facilitated.

The invention relates to the technical field of yarn tensile strength testing devices, and discloses a textile yarn tensile strength testing device which comprises a rack, a yarn positioning assembly is fixedly mounted on the inner side of the middle of the rack, tensile testing assemblies are slidably mounted in the two sides of the rack, and a first threaded shaft is rotatably mounted between the two opposite side walls of the rack; moving blocks matched with the stretching test assembly are installed on the two sides of the exterior of the first threaded shaft in a threaded mode, and a middle supporting pile matched with the yarn positioning assembly is rotationally arranged on the outer side of the middle of the first threaded shaft in a sleeving mode. After the structure is adopted, the device has the following advantages that a plurality of groups of yarns can be correspondingly mounted between the stretching test assembly and the yarn positioning assembly, the yarns can be stretched and subjected to strength test at the same time, the strength of the yarns is detected through the plurality of groups of tension force sensors, and data in the plurality of groups of tension force sensors are obtained at the same time; the tensile strength of the yarn can be quickly judged, and the testing efficiency is improved.

The utility model discloses cable tensile strength detection equipment for cable production, and particularly relates to the technical field of cable detection, the cable tensile strength detection equipment comprises a placing table, a rectangular block II is arranged at one end of the top of the placing table in a sliding manner, a proper clamping tool can be selected according to the shape of a cable to be detected, and if the tensile strength of the cable needs to be detected, the rectangular block II can be used for clamping the cable. When the tensile property of the insulating sheath needs to be detected, one end of the insulating sheath can be placed at the top of a second rubber plate, the double-end threaded rod is rotated to drive a gear to rotate, and the gear is driven to rotate to drive the clamping rings to move in opposite directions to clamp the other end of the cable. When the clamping device is used for clamping the insulating sheath, the rack is driven to move downwards, the connecting plate and the pressing plate are driven to move downwards to press one end of the insulating sheath, meanwhile, the first spring telescopic rod is compressed, stable clamping of the insulating sheath is achieved, the clamping device is high in practicability and universality, and the production cost is reduced.

The invention discloses a packaging bag tensile strength testing device, and relates to the technical field of packaging bag production, the packaging bag tensile strength testing device comprises a base, one side of the base is fixedly connected with a controller, the top of the base is fixedly connected with a lifting assembly, the lifting assembly comprises a connecting plate, the bottom of the connecting plate is fixedly connected with a tensile force measuring piece, and the tensile force measuring piece is fixedly connected with the controller. A testing mechanism is arranged on one side of the lifting assembly; the test mechanism comprises a longitudinal sample strip cutting unit, the longitudinal sample strip cutting unit is arranged at the top of the base, and the longitudinal sample strip cutting unit is used for cutting longitudinal sample strips of the packaging bag. Through cooperative use of the longitudinal spline cutting unit, the transverse stress testing unit and the positioning unit, the tedious steps of manual cutting of splines and clamping testing of the splines are avoided, transverse and longitudinal tensile strength testing of the packaging bag is achieved at the same time, and the testing efficiency of the tensile strength of the packaging bag is improved.

The invention provides an ultrasonic rebound comprehensive detection method and system for bridge pier column concrete strength, and relates to the technical field of structure nondestructive testing, and the method comprises the following steps: obtaining ultrasonic propagation velocity data of a to-be-detected part of a bridge pier column; obtaining springback value data of a to-be-detected part of the bridge pier column; performing coupling processing on the ultrasonic propagation speed data and the rebound value data, and determining the concrete strength of the to-be-detected part by combining the pouring bedding direction of the bridge pier column concrete and the strength increasing coefficient corresponding to the curing age. And the accuracy and the stability of bridge pier column concrete strength detection are obviously improved.

The invention discloses a cable tensile strength testing device and a testing process thereof, and relates to the technical field of cable tensile detection.The cable tensile strength testing device comprises a main body and a hydraulic cylinder fixed to the top of the main body, a stress sensor module is fixed to the output end of the hydraulic cylinder, and the top of the main body is slidably connected with an adjusting plate and a stretching frame; the adjusting plate is fixed to one end of the stress sensor module, a rotating shaft is movably connected to the interior of the stretching frame, and gears are fixed to the two sides of the exterior of the rotating shaft. According to the cable tensile strength detection device, the hydraulic cylinder stretches out to drive the two sets of fastening plates to clamp and fasten a cable firstly, then when the clamping force of the two sets of fastening plates to the cable reaches a set value, the hydraulic cylinder continues to stretch out to drive the stretching frame to move through the adjusting plate, and therefore the tensile strength of the cable can be detected; the cable does not need to be manually clamped and fixed, so that the problem that the precision is influenced by loosening of the cable due to insufficient cable clamping force caused by manual clamping of the cable is effectively avoided.

The invention discloses a method for testing the connection strength of a bolt fastener, and relates to the technical field of fastening mechanical analysis. The bolt fastener connection strength testing method comprises the following steps: acquiring bolt data through a built-in sensor in an electric wrench, analyzing, classifying and transmitting the bolt data to a relay station to obtain corresponding response bolt data, then sequencing the response bolt data according to priorities, and uploading the response bolt data to a cloud platform according to network conditions; prompting operation is carried out through the cloud platform and is fed back to the relay station; the effect of improving the accuracy of the connection strength test of the bolt fastener is achieved, and the problem that the accuracy of the connection strength test of the bolt fastener is low due to discontinuous signals in the prior art is solved.

The invention discloses a drug package tensile strength testing device, and belongs to the technical field of drug package testing. The device mainly comprises a base; the device comprises a lower clamping assembly, an upper clamping assembly and a speed change assembly, the speed change assembly comprises an upper bottom plate and an electric cylinder, and a clamping sleeve is installed at the output end of the electric cylinder; a rotary drum, a driving gear, a convex block and a driven gear are rotationally mounted at the bottom of the limiting disc, and the driven gear is in meshed connection with the driving gear; a shaft sleeve is fixedly mounted on the lower bottom plate; and the speed change gear is rotationally installed on the shaft sleeve, the speed change gear is in meshed connection with the driven gear, and at least two sets of limiting rods are installed on the speed change gear. According to the device for testing the tensile strength of the medicine package, through the speed changing device, when a packaging film needs to be subjected to a simulation actual condition test, the speed of the lead screw is changed, so that the moving speed of the upper clamping assembly is changed, and the effect of changing the moving speed of the upper clamp is achieved.

A hydraulic mechanical component strength testing apparatus and a testing method, relating to the technical field of mechanical component strength testing, for use in performing strength testing on mechanical components with different temperatures. The testing apparatus comprises a frame and a clamping assembly; the clamping assembly comprises two clamping plates and a clamping drive mechanism; a vertically-arranged hydraulic rod is arranged at the top of the frame; a placement platform fixedly connected to the bottom of the frame is arranged below the hydraulic rod; the two clamping plates are located above the placement platform; a placement seat for supporting a mechanical component is arranged between the two clamping plates; a hydraulic sensor for measuring the pressure borne by the placement seat is arranged between the placement seat and the placement platform; the placement platform is further provided with a display in signal connection with the hydraulic sensor; and the clamping plates are each provided with a heating assembly used for heating the mechanical component. The present invention can perform strength testing on mechanical components with different temperatures.

The invention discloses a nested self-adaptive adjustment loading device and method for sheet glass tensile strength testing, and belongs to the technical field of glass tensile strength tests.The device comprises an upper mounting mechanism and a lower mounting mechanism, the upper mounting mechanism and the lower mounting mechanism are connected through a sliding assembly, and the sliding assembly comprises parallel linear guide rails; the lower end of the parallel linear guide rail is fixed on the lower mounting mechanism, and the upper end is slidably connected with the upper mounting mechanism. According to the nested self-adaptive adjustment loading device and method for testing the tensile strength of the sheet glass, the design of double sliding rails is adopted, the upper clamp slides on the two parallel linear guide rails, left-right and in-plane relative displacement is further limited, the silica gel gaskets are adopted to prevent the glass from being in direct contact with the clamp, and the clamping efficiency is improved. When the contact surface of the clamp and glass is not smooth and possibly has stress concentration, the low-modulus silica gel gasket can provide a chance of self-adaption to the side surface of a groove of the clamp for a glass sample, and is suitable for different types of sheet-shaped glass samples.

The invention provides a method for testing the bonding strength between a mute sponge and a tire lining, and relates to the technical field of mute sponge tire physical performance tests.The method comprises the steps that a to-be-detected tire is cut into a rectangular sample with the preset size through a cutting machine, the mute sponge and the tire lining on the rectangular sample are partially separated, and a plurality of test samples are manufactured; respectively clamping the mute sponge and the tire lining part of the test sample by using a tensile machine clamping device, recording the force required all the time in the process of stripping the test sample with the preset length, and obtaining test data; and evaluating the bonding strength between the detected tire mute sponge and the tire lining. According to the method for testing the bonding strength between the mute sponge and the tire lining, provided by the invention, the bonding performance between the mute sponge and the tire lining can be tested and verified, so that whether the bonding performance of the batch of tires can meet the use requirements or not can be quantized and predicted in advance; and it is ensured that the batch of tire mute sponges cannot fall off in the tire running process.

The utility model discloses a regenerated fiber fabric environment-friendly performance detection device, which relates to the technical field of fabric environment-friendly performance detection and comprises a recycled fabric tension detection table, and a tension strength testing mechanism for clamping fabric is slidably arranged at the upper end of the recycled fabric tension detection table. And a fabric flattening and rolling mechanism used for pulling the fabric is fixedly arranged on one side of the upper end of the recycled cloth tension detection table. The recycled cloth tension detection device solves the problem that the physical performance of the regenerated fiber fabric needs to be detected at present; the regenerated fiber fabric is clamped between the tension strength testing mechanism and the fabric flattening and rolling mechanism, the tension meter performs measurement from the middle position of the two sets of side pneumatic clamps, the accuracy of the testing result is guaranteed, and by arranging a guide roller and an upper pressing assembly in the fabric flattening and rolling mechanism, the fabric flattening and rolling mechanism can be used for testing the regenerated fiber fabric. The rotation of the guide roller can drive the regenerated fiber fabric to translate forwards to provide pulling force.

The application relates to the field of concrete testing, in particular to a concrete seamless floor strength testing device and an operating method thereof. The concrete seamless floor strength testing device comprises a mounting frame, a moving driving part one, a connecting table one and a dynamic rebound apparatus; the upper end of the mounting frame is provided with the moving driving part one; the driving end of the moving driving part one is provided with the connecting table one, and the moving driving part one controls the up-down movement of the connecting table one; three dynamic rebound apparatuses are arranged on the connecting table one; the device further comprises a moving driving part two, a connecting table two and a cylinder; the connecting table one is provided with the moving driving part two; the driving end of the moving driving part two is provided with the connecting table two; three cylinders are arranged on the connecting table two; three groups of concrete seamless floor strength data are collected by the three dynamic rebound apparatuses for parallel comparison, so that the error is reduced, and the test area of the dynamic rebound apparatus is protected by the cylinder.

The invention relates to the technical field of pipe strength detection, and particularly provides a PEXA pipe strength detection table which comprises a base, a constant temperature box, a water injection detection mechanism, a supporting plate and an adjusting simulation mechanism. The end, connected with the moving plate, of the pipe is adjusted through cooperation of the rotary locking part, the telescopic part and the plugging locking part, the bending angle of the pipe is adjusted, the bending angle of the pipe is simulated through cooperation with the water injection detection mechanism, and different bending angles are adjusted. Therefore, the hydrostatic strength detection of the pipe in the bending state and the hydrostatic strength detection of the pipe in different bending states are realized, the hydrostatic strength of the pipe is comprehensively evaluated, the strength detection of the pipe is more comprehensive, accurate and reliable, and the problem that the detection is qualified in the linear state but fails in actual bending use is avoided.

The invention provides a comprehensive evaluation method for the compressive property of a coal mine grouting reinforcement material. The evaluation method comprises two aspects of static compressive property evaluation and dynamic compressive property evaluation. According to the static compression resistance evaluation, uniaxial compression strength testing is carried out on a grouting reinforcement material test piece, and the compression strength change rule of samples in different aging periods is obtained and used for evaluating the static compression resistance of the samples. According to the dynamic compression resistance evaluation, a Hopkinson pressure bar is adopted for dynamic impact performance testing, strain data, strain rate data and stress data are obtained, and a stress-strain curve is further obtained and used for evaluating the dynamic compression resistance of the sample. The evaluation method disclosed by the invention is relatively comprehensive, comprises two aspects of static compression resistance evaluation and dynamic compression resistance evaluation, can comprehensively and deeply reflect the compression resistance of the grouting reinforcement material, and provides a basis for performance optimization of the grouting reinforcement material and development of a new material.

The invention relates to the technical field of wood strength detection, in particular to a strength testing device for a wood composite board and a detection method.The strength testing device comprises a base table and a driving base fixed to the base table, and is characterized by further comprising symmetrical supporting mechanisms; a driving mechanism is arranged in the driving base so as to drive the two sets of supporting frames to be close to or away from each other. A centering roller and first pressure sensor cooperation mechanism of the transverse centering mechanism is adopted, a roller driving mechanism is combined to drive a driving roller to rotate, a plate is driven to transversely move through friction force, two sets of first pressure sensors detect the pressure bearing value of the roller in real time, and rotation is stopped when the numerical values on the two sides are equal; the transverse center of the plate is aligned with the axis of the driving roller, and personal errors are eliminated.

The invention relates to the technical field of material physical property testing, and discloses an injectable hydrogel wound dressing tensile strength testing method, which comprises: establishing a correlation model of the mass and the maximum fracture load of a standard sample at different temperatures, and the correlation model of the initial rigidity and the temperature; measuring the mass and the actual maximum fracture load of the to-be-measured sample, and determining the actual initial rigidity of the to-be-measured sample; according to the method, the actual initial stiffness is calculated, the equivalent temperature of the test is converted by utilizing the actual initial stiffness, the standard theoretical maximum fracture load is calculated in combination with the sample mass and the corresponding model, and the performance is judged by comparing the two, so that the measurement of the geometric dimension of an irregular sample is avoided by constructing the correlation between the mass and the mechanical performance; the quality control problem of an in-situ forming material is solved, and the reliability of a judgment result in an industrial environment is further ensured by utilizing mechanical response data of the same test through an integrated temperature self-adaptive calibration mechanism.

The present invention relates to the technical field of testing equipment, and specifically discloses a prestressed steel strand performance testing device, comprising a machine body and an adjustable test bench mounted on the top of the machine body via an inclination adjustment unit. The top of the adjustable test bench is also provided with a continuous impact unit, a guide unit, and two left-right symmetrical multi-stage clamping units, wherein the multi-stage clamping units include a primary bending clamping assembly, a bending control assembly, and a secondary circumferential clamping assembly. The present invention can perform tensile strength testing and fatigue strength performance testing on the steel strand in a horizontal state, and can also perform tensile strength testing and fatigue strength performance testing on the steel strand in an inclined state; the present invention performs multi-stage clamping and fixing of the steel strand by cooperating with the primary bending clamping assembly and the secondary circumferential clamping assembly, thereby achieving multi-point and multi-directional clamping, ensuring that the steel strand is subjected to uniform clamping force in multiple directions, and preventing the steel strand from sliding during the tensile strength test.

The invention belongs to the field of textile seam strength testing, and particularly relates to a textile seam strength testing device which comprises a device base and a detection sample, two sets of supporting frames are fixedly connected to the top end of the device base, and a hanging bracket is slidably connected to the supporting frames; the top end of the device base and the bottom end of the hanging bracket are fixedly connected with clamping blocks, the device base is provided with a measuring mechanism, the measuring mechanism is used for measuring the length of a seam of a detection sample, the left side and the right side of the detection sample are provided with clamping mechanisms, and the clamping mechanisms are used for clamping and fixing the detection sample; through the structural design of the measuring mechanism, when the seam of the detection sample is damaged, the two groups of fixing plates can rotate to the front side and the rear side of the detection sample, so that the maximum tensile length of the seam of the detection sample can be directly measured through scale marks on the surfaces of the fixing plates, the detection process is more convenient, and the detection efficiency is effectively improved.

The invention provides a method for testing the strength of powder for spraying based on ultrasonic pulverization, which comprises the following steps: selecting spraying powder to be tested, and uniformly mixing with water to obtain a test raw material; performing ultrasonic cell crushing on the test raw material to obtain a crushed sample; and testing the particle size distribution of the crushed sample, calculating the powder crushing degree according to the particle size distribution, and evaluating the powder strength according to the powder crushing degree. According to the powder strength testing method provided by the invention, the process condition is closer to the actual working condition of a dynamic impact environment in the powder spraying process, the overall strength state of the powder is accurately evaluated, the operation is simpler and more convenient, the testing efficiency is high, the strength evaluation is accurate, and the method has great engineering application value.

The utility model provides a cable tensile strength testing device, and relates to the technical field of deep shale gas horizontal well fracturing. The first clamping and fixing mechanism is used for clamping and fixing a ferrule structure of the tested cable, and the ferrule structure is formed by bending one end of the cable into an arc-shaped closed loop; the rope sleeving column is transversely connected to the base in a sliding mode, and the loop structure can be connected to the rope sleeving column in a sleeving mode; the tension detection mechanism comprises a tension detector, one end of the tension detector is connected with the rope sleeving column, and the other end of the tension detector is connected with the base; the winding mechanism comprises a winding roller and a driving motor which are in transmission connection, the winding roller is installed on the base, and a containing groove is formed in the side wall of the winding roller; and the second clamping mechanism is arranged in the accommodating groove and is used for clamping and fixing the other end of the cable. And through the arrangement of the winding roller, the cable can be pulled, and the device can adapt to cables with different lengths.

The invention discloses a rock dry-wet cycle test device and a test method thereof, and belongs to the technical field of rock strength testing, the rock dry-wet cycle test device comprises a loading system, a test cylinder, a measuring system, a water circulation device, a drying device, an acoustic emission system and a computer control system; the test cylinder is divided into an inner cylinder and an outer cylinder, the outer cylinder is connected with the water circulation system and the drying device, a sample is fixed by the inner cylinder, and dry-wet circulation conditions with lateral confinement are created. The computer system controls the lifting platform to lift by controlling the hydraulic device so as to load and unload the sample; the data acquisition module is connected with an axial pressure sensor and a displacement sensor to acquire axial force and displacement data in real time; the water circulation device and the drying device are controlled to automatically realize test operations such as water feeding, water discharging and drying in dry-wet circulation; damage identification in the dry-wet cycle process of the mudstone sample is achieved by controlling the acoustic emission system, and an acoustic emission detection result is stored to analyze the degradation effect of dry-wet cycle on the physical and mechanical properties of the mudstone sample.