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43results about How to "Avoid trial failure" patented technology
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System and method for measuring direct tensile strength and deformation of rock
InactiveCN103674707AAccurately measure deformation dataTroubleshooting Stretch FailuresMaterial strength using tensile/compressive forcesElectrical/magnetic solid deformation measurementStress concentrationRock sample
The invention provides a system and a method for measuring direct tensile strength and deformation of rock by using manual kerfs. The system comprises test loading equipment, a rock sample, metal sleeve caps, a flexible connecting mechanism and a tensile load sensor, wherein the rock sample is cylindrical, two kerfs are symmetrically cut in two sides of the middle position of the rock sample, and the kerf directions are the radial direction of the sample; and an upper metal sleeve cap and a lower metal sleeve cap are arranged at two ends of the rock sample respectively, the upper metal sleeve cap is connected with an upper clamp clamping opening of the test loading equipment through the flexible connecting mechanism and the tensile load sensor sequentially, and the lower metal sleeve cap is connected with a lower clamp clamping opening of the test loading equipment 7 through the flexible connecting mechanism. According to the technical scheme, the defects that the rock sample is prone to bend or produce torsion stress in a direct tensile test are overcome, at the same time, the situation that tensile fracture is not produced during fracture due to the end stress concentration effect of the rock sample is avoided, and the rock tensile strength and the axial and radial deformation of the rock in a stretching process can be accurately and effectively measured.
Owner:UNIV OF SCI & TECH BEIJING
Preparation method and device for seabed natural gas hydrate
The invention discloses a preparation method and a device for seabed natural gas hydrate. The preparation method comprises the following steps: A) installing a sample; B) detecting gas tightness, C) carrying out evacuation to remove impure gas; D) injecting water to saturate the sample; E) adding gas; F) circulating the gas-water mixture to prepare sample; and G) judging whether hydrate is synthesized, namely judging whether the hydrate in the soil sample in a high-pressure reaction container is synthesized under corresponding temperature and pressure on the condition of keeping the pressure of gas in a gas-water mixing and separating container stable. The bottoms of the high-pressure reaction container and the gas-water mixing and separating high-pressure container are connected by a pulsation-free pump and a valve, and upper parts of the high-pressure reaction container and the gas-water mixing and separating high-pressure container are connected by the valve; A vacuum pump and a water supply box are respectively connected with the gas-water mixing and separating high-pressure container by the valve after passing through a three-way connector, and a constant temperature bath in a constant temperature device is connected with a jacket of the high-pressure reaction container by two flexible pipes. The device of the invention has simple structure, high accuracy, high stability and easy operation.
Owner:INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
Surface high-temperature measurement device for nonmetallic heat resistant material plane test piece of hypersonic speed aircraft
InactiveCN102183312AAvoid trial failureAccurate measurementThermometers using electric/magnetic elementsUsing electrical meansMeasurement devicePre stressing
The invention discloses a surface high-temperature measurement device for a nonmetallic heat resistant material plane test piece of a hypersonic speed aircraft. The device comprises a high-temperature ceramic framework, a temperature measurement thermocouple, a nonmetallic heat resistant material flat test piece, a silicon molybdenum infrared radiation heating tube and a computer. The high-temperature ceramic framework is provided with a circular hole; the temperature measurement thermocouple sleeved with a ceramic insulating sleeve is inserted into the circular hole of the high-temperature ceramic framework; and the front part of the temperature measurement thermocouple is bent into an upward arch; the nonmetallic heat resistant material flat test piece is pressed on the high-temperatureceramic framework by means of self weight to press the forefront of the temperature measurement thermocouple to form a ball-shaped temperature sensing part by welding. Due to interaction between the downward pressure of the nonmetallic heat resistant material flat test piece and the front arch upward elasticity of the temperature measurement thermocouple and adoption of double technology measuresof applying pre-deformation and increasing pre-stress, tight contact of the nonmetallic heat resistant material flat test piece and the temperature sensing part of the front end of the thermocouple under the high-temperature environment of between 1,000 and 1,400 DEG C is ensured, so that the surface high-temperature test result of the nonmetallic heat resistant material plane test piece of the hypersonic speed aircraft such as a missile, a space shuttle and the like is accurate and reliable.
Owner:BEIHANG UNIV
High-temperature and high-pressure hydrofracturing clamp holder and test method thereof
PendingCN109870349AImprove test success rateEasy to operateMaterial strength using tensile/compressive forcesEngineeringHigh pressure
The invention discloses a high-temperature and high-pressure hydrofracturing clamp holder and a test method thereof. The high-temperature and high-pressure hydrofracturing clamp holder comprises a test barrel, a barrel upper mounting part, a barrel lower mounting part and a barrel inner mounting part. A hydrofracturing test can be carried out for a small rock sample; a single test can be carried out by one person; the operation is convenient; the test success rate is high; and the single test cost is relatively low. The clamp holder has five seal designs in total, so that test failure caused by liquid leakage in a test process can be effectively avoided; seal parts are sealed in a related part compressing mode, and in a heating process or the test process, the seal parts can be continuously compressed; and a seal pre-tightening force application and provision part is specially designed in the barrel inner mounting part, so that expansion force after heating of the part in the test process can be resisted, research on a fracture mechanical behavior of a high-temperature and high-pressure rock mass under a thermal-mechanical coupling effect is facilitated, and theoretical basis and guidance can be provided for construction engineering of reservoir layers in high-temperature rock mass geothermal exploitation engineering.
Owner:CHINA UNIV OF MINING & TECH
Test method for lightning indirect effects of finished special vehicle
ActiveCN105527514AReduce lead resistanceAvoid safety hazardsTesting electric installations on transportTechnical supportAutomotive engineering
The invention provides a test method for lightning indirect effects of a finished special vehicle. The practical discharging condition of lightning in the nature is combined, a heavy current and a high voltage are used to simulate the discharging process of a lightning rod struck by lightning, lightning protection condition of the special vehicle and electronic equipment therein is tested, test configuration, flows, methods and waveform parameters are made clear, and a unified executable method is thus formed. The problem that a standard method for reference lacks in the prior art is solved, and technical support is provided for ensuring the capability of protecting the finished special vehicle against the lightning indirect effects.
Owner:BEIJING INST OF ASTRONAUTICAL SYST ENG +1
Testing method for water permeability resistance of concrete core sample
InactiveCN103822864AAvoid trial failureSimple and fast operationPreparing sample for investigationPermeability/surface area analysisWater leakageRoom temperature
The invention discloses a testing method for water permeability resistance of a concrete core sample. The testing method comprises the steps as follows: 1) performing core drilling for sampling on a to-be-tested concrete structural solid; 2) machining the cylindrical concrete core sample with the height of 150 mm; 3) placing the cylindrical concrete core sample into an oven, then standing and cooling the concrete core sample to a room temperature; 4) painting high-permeability modified epoxy waterproof paint on the cylindrical side surface of the cylindrical concrete core sample, and standing the concrete core sample for 40-48 h; and 5) sealing the cylindrical concrete core sample into a press plate type anti-permeability instrument, enabling a water end surface to be downward, and performing water permeability resistance tests and data processing on the cylindrical concrete core sample. Compared with the prior art, the technical scheme can avoid test failures caused by leakage due to the fact that sealing or grouting materials cannot be firmly combined with core samples in the prior art and is more suitable for the water permeability resistance tests for concrete structure field core sample drilling. The testing method has the advantages of convenience in operation, small workload, low labor intensity, reliability in sealing effect and short test cycle.
Owner:SHANDONG PROVINCIAL ACAD OF BUILDING RES
Mid-range infrared target simulator equipment
InactiveCN106839878AGuaranteed alignmentEasy position adjustment and lockingAiming meansUltrasound attenuationSimulation
The invention provides mid-range infrared target simulator equipment. A modular combined structure is adopted, and the mid-range infrared target simulator equipment is mainly composed of an infrared optical system, a one-dimensional rotating platform system, a lifting mechanism and the like, wherein the infrared optical system comprises a black body, an adjustable diaphragm, an adjustable attenuation slice, a collimator assembly, a light-shading hood and the like, horizontal rotating and locating of a platform within a certain range are achieved through the one-dimensional rotating platform system, and the accuracy is 0.1 degree, and the lifting mechanism mainly completes overall up-and-down rising and falling of the equipment and achieves whole-distance fine tuning and the self-locking function; and moving rolling wheels and a fixed mechanism are designed on the bottom face of the equipment, and moving and transporting and the testing stability requirement of the equipment are achieved. The mid-range infrared target simulator equipment has the advantages of being convenient and easy to use, attraction in equipment, easy to maintain, long in service life and the like, and infrared target simulation in certain-type mid-range infrared guidance missile vibration environment stress screening tests is successfully achieved.
Owner:SHANGHAI INST OF ELECTROMECHANICAL ENG
Device and method for collecting toxic gas in high-temperature decomposition of materials
ActiveCN109000998AAccurate Qualitative and Quantitative AnalysisBuffer superatmospheric pressureWithdrawing sample devicesPreparing sample for investigationToxic gasCombustion
The invention discloses a device and a method for collecting toxic gas in high-temperature decomposition of materials. The device comprises a tubular cracking furnace and a sample boat, and further comprises a double-hole ball head inlet connector, a quartz combustion cylinder, a double-hole ball head outlet connector, an anti-inverse-suction buffer bottle, a gas absorption bottle, a drying tube,a dust filter, a needle valve, a flow meter and a gas storage bag, wherein the quartz combustion cylinder is located in the tubular cracking furnace. After being put into the sample boat, a sample ispushed to the high-temperature quartz combustion cylinder for combustion through a sample pushing magnetic block; after a part of the generated toxic gas is absorbed by an absorption liquid, the restof the toxic gas is dried and subjected to dust filtration; and the filtered toxic gas is collected in the gas storage bag. By the adoption of the device and the method, under the condition that gas flow of carrier gas is not interrupted, the sample can be rapidly and accurately fed; the test failure caused by the fact that a gas path is opened by impulsion at the moment of combustion can be avoided; the device is simple in structure, high in universality, short in analysis time, low in cost and convenient to operate; and the toxic gas can be better subjected to accurate qualitative and quantitative analysis.
Owner:ZHUZHOU TIMES NEW MATERIALS TECH +1
Device for composite steel plate shearing tests and using method thereof
PendingCN106918500ANo horizontal movementHigh hardnessMaterial strength using steady shearing forcesSteel platesEngineering
The invention provides a device for the composite steel plate shearing tests. The device is composed of three parts: an electronic universal tensile testing machine, a base of a shearing clamp, and a pressing device of the shearing clamp. The base of the shearing clamp comprises a blade, a blade seat, and a shearing base. The pressing device of the shearing clamp comprises a sample pressing device base, a sample backup plate, and a bolt for adjusting the sample gap. The device fully utilizes the auxiliary structure of a testing machine hydraulic clamp, the precise control of the test process is guaranteed, the electronic universal tensile testing machine does not need to be changed, the operation is simple and convenient, the design is reasonable, the cost is saved, and the device is user-friendly and convenient.
Owner:NANJING IRON & STEEL CO LTD
Visible rock core clamp
The invention discloses a visible rock core clamp which is designed to realize that a rock core is visible during a rock seepage simulation experiment so as to meet requirements on scientific research and production. The visible rock core clamp mainly comprises a transparent rubber barrel covering the rock core, an adjustment plunger and a stopping plunger which are used for clamping the rock core, a transparent barrel and an outer barrel which are used for sleeving the transparent rubber barrel, an upstream sealing disk and an adjustment sleeve which are used for sleeving the adjustment plunger, a downstream sealing disk for sleeving the stopping plunger, and an upstream pressure cap and a downstream pressure cap which are used for locking the clamp. The visible rock core clamp disclosed by the invention can be applied to the rock core clamping in the rock seepage simulation experiment in the field of petroleum geology; during experiment, a user can directly observe the experiment condition of the rock core through the transparent barrel and the transparent rubber barrel, so that test failures and test data errors which are caused by medium crossflow can be avoided; a photographing device can be used for monitoring the experiment; an ultraviolet light source can be used for irradiating the rock core, so that the fluorescent reaction of petroleum on the surface of the rock core can be observed, and all experiment researches can be implemented.
Owner:PETROCHINA CO LTD
Overload protective device for strength tension test of structure of thin-wall case of high-speed aerocraft
InactiveCN101545830AAvoid accidental damageAvoid trial failureStructural/machines measurementEngineeringTensile testing
The invention relates to an overload protective device for a strength tension test of the structure of a thin-wall case of a high-speed flying vehicle. The overload protective device comprises a two-way limiting permanent connection pull rod, a one-way limiting flexible connection pull rod, a load transition frame, wherein the first end of the two-way limiting permanent connection pull rod is fixedly connected with the output end of a tension actuating unit; the first end of the one-way limiting flexible connection pull rod is fixedly connected with a loading connect collar; the upper side and the lower side of the load transition frame are respectively provided with a connecting hole; the second end of the two-way limiting permanent connection pull rod penetrates through the connecting hole at the upper side of the load transition frame, and positions where the second end of the two-way limiting permanent connection pull rod is positioned at the upper side and the lower side of the connecting hole at the upper side are respectively limited; the second end of the one-way limited flexible connecting pull rod passes through a connecting hole at the lower side of the load transition frame, and the upper part of the second end of the one-way limiting flexible connection pull rod, which is positioned at the connecting hole at the lower side, is provided with a limiting part, thereby the load transition frame and an one-way limiting permanent connection pull rod only relatively move in a single direction, which provides reliable assurance for the safety of a high-temperature strength control test on the structure of a thin-wall case of the high-speed aerocraft, such as a guided missile, and the like.
Owner:BEIHANG UNIV
Mechanism for preventing car seat lock failure and peeling of upper and lower slide rails
The invention relates to a mechanism for preventing a car seat lock failure and peeling of upper and lower slide rails. The mechanism is composed of slide rail reinforcement plates, an anti-peeling tooth plate, a fixing bracket, a retaining spring, a spring fixed cotter pin, a seat belt fixing bolt, a side plate assembly and a rivet in an assembled mode. The mechanism can be installed below existing slide rails, in a normal use state, the mechanism can remain open, a normal sliding function of the slide rails is not influenced, and when a forward collision occurs, the upper and lower slide rails are fixedly connected as a whole by the mechanism to prevent the slide rails from producing lock failure sliding and peeling of the tail ends of the slide rails.
Owner:CHANGCHUN FAWAY ADIENT AUTOMOTIVE SYST CO LTD
Liquid helium conveying system used for large-size multi-section liquid helium heat sinks and class converting method for large-size multi-section liquid helium heat sinks
InactiveCN103343884AAvoid trial failureAvoid the hassle of frequent Dewar replacementsAerodynamic testingPipeline systemsLiquid nitrogen coolingNitrogen
The invention provides a liquid helium conveying system used for large-size multi-section liquid helium heat sinks and a class converting method for converting liquid nitrogen to liquid helium of the liquid helium heat sinks on the basis of the liquid helium conveying system. The liquid helium conveying system and the method are applied to an engine vacuum plume experimental study. The liquid helium conveying system comprises a heat sink system, a liquid nitrogen supplying system, a liquid helium supplying system, a nitrogen supplying system and a helium supplying system. The heat sink system comprises five large-size liquid helium heat sinks and four liquid nitrogen heat sinks. The liquid nitrogen supplying system is provided with conveying pipelines for the liquid helium heat sinks and the liquid nitrogen heat sinks, and provided with a liquid nitrogen cooling box and a liquid helium cooling box, wherein the liquid nitrogen cooling box and the liquid helium cooling box are used for centrally containing and managing liquid nitrogen adjusting valves and liquid helium adjusting valves. According to the liquid helium conveying system used for the large-size multi-section liquid helium heat sinks and the class converting method for the large-size multi-section liquid helium heat sinks, liquid helium refrigeration can be provided for the large-size multi-section liquid helium heat sinks at the same time, unified liquid supplying is achieved for all the heat sinks, operation is convenient, cost is saved, floor space is small, the valves can be centrally controlled conveniently, working efficiency is improved, and operation and maintenance are convenient.
Owner:BEIHANG UNIV
Air floatation hanging type gravity unloading device for space deployable mechanism
InactiveCN110901966ALow damping motionAvoid trial failureCosmonautic condition simulationsClassical mechanicsStructural engineering
The invention relates to an air floatation hanging type gravity unloading device for a space deployable mechanism. A first longitudinal guide rail and a second longitudinal guide rail are located on the same horizontal plane and are parallel to each other; the first lateral air floating block is mounted on the outer side surface of the first longitudinal guide rail, and the first upper air floating block is mounted on the upper side surface of the first longitudinal guide rail; the first lateral air floating block and the first upper side air floating block are fixedly connected with one end of the transverse guide rail through a bracket; the second lateral air floating block and the second upper air floating block are fixedly connected with the other end of the transverse guide rail through a bracket; the lateral air floating block, the upper air floating block and the transverse air floating block are suspended by compressed air; the lateral air floating block and the upper air floating block move on the longitudinal guide rail, the transverse air floating block moves on the transverse guide rail, the target mechanism is connected with the transverse air floating block, and the two-dimensional movement of the target mechanism in a plane is simulated through the longitudinal movement of the lateral air floating block and the upper air floating block and the transverse movementof the transverse air floating block.
Owner:BEIJING SATELLITE MFG FACTORY
Auxiliary device for tension test of three rows of roller chains
InactiveCN105784352AReasonable structureIngenious structureMachine gearing/transmission testingEngineeringRoller chain
The invention discloses an auxiliary device for tension test of a three rows of roller chains. The auxiliary device comprises a coupling part and a clamping part. The front end of the coupling part is provided with three parallel connecting square holes and a connecting pin through hole which penetrates through the connecting square holes. The lengths, the widths and the depths of the three connecting square holes match one end of each of the three rows of roller chains so that an inner chain plate end can be inserted into the three connecting square holes and furthermore the inner chain plate end is connected with the connecting part of the auxiliary device in a shaft connecting manner through a connecting pin. After the auxiliary device for the tension test is connected with the three rows of roller chain samples, a requirement for the axial tension test of three rows of roller chains for an elevator can be satisfied so that the three rows of roller chains for the elevator can reasonably and stably perform the tension test which satisfies a GB / T 1243 standard requirement on a universal material tester.
Owner:上海市机械制造工艺研究所有限公司
System and method for controlling and monitoring locked-rotor of compressor locked-rotor performance test bench
InactiveCN111828302ARealize automatic operationImprove detection efficiencyPump testingCurrent/voltage measurementVoltage alarmControl engineering
The invention discloses a system and method for controlling and monitoring a locked-rotor of a compressor locked-rotor performance test bench. The system comprises a data processing module, wherein the data processing module is in parallel connection with a data recording module, is in serial connection with a display module through a communication module, and is in parallel connection with a control module; the control module is in serial connection with a component; the component is in parallel connection with an overcurrent alarm apparatus and a low-voltage alarm apparatus; the overcurrentalarm apparatus and the low-voltage alarm apparatus are in parallel connection with a feedback circuit; and the other end of the feedback circuit is in serial connection with the data processing module. The system and method can accurately determine the locked-rotor of a compressor in the compressor locked-rotor performance test bench, need to manually restore a protector, end the test and recorddata, realizes the automatic operation of the locked-rotor performance test bench, improves the detection efficiency, and avoids the test failure caused by misjudgment.
Owner:GUANGDONG BAIYUN UNIV
Alkali addition and dilution device and method for preventing Kjeldahl azotometer samples from bumping
ActiveCN105890968BSolve the unstable test resultsAvoid trial failurePreparing sample for investigationNitrogen determinationNitrogenDigestion
Owner:JINAN ALVA INSTR CO LTD
PHC pile body internal force testing method based on optical fiber strain and optical fiber laying method
ActiveCN111576504AReasonable layoutFacilitate the determination of the construction processFoundation testingOptical fibre/cable installationEngineeringMaterials science
The invention discloses a PHC pile body internal force testing method based on optical fiber strain and an optical fiber laying method. The PHC pile body internal force testing method comprises the steps of a preparation stage; a pre-burying and piling stage, wherein distributed optical fiber sensors are laid on PHC piles, and the PHC piles are driven into corresponding preset places; a measurement stage, wherein testing of loading and unloading of the PHC piles is performed by using an optical fiber strain analyzer; an internal force calculation stage, wherein pile body axial force, pile bodyside friction and pile body bending moment are calculated correspondingly through the obtained axial compression strain data of the optical fiber; and detection result data analysis, wherein the dataof the pile body axial force, the pile body side friction and the pile body bending moment of each PHC pile are analyzed correspondingly, and the distribution of the pile body axial force and the pile body side friction along with the depth and the change rules of the pile end resistance, the pile body side friction and the pile body bending moment along with the pile top load are determined. According to the testing method, the testing process is clear and ordered, the optical fiber arrangement is reasonable, the correctness of the obtained data is high, and the reliable data and theoreticalbasis can be provided for site construction.
Owner:武汉至科检测技术有限公司
Free-flying model jet test device
ActiveCN107764508BTroubleshoot jet source issuesSolving Conundrums of Injection Gas SourcesAerodynamic testingGas cylinderEngineering
The invention provides a free flight model jet test device comprising a model head part (1), a model intermediate section (2) and a model tail section (3). The model head part (1), the model intermediate section (2) and the model tail section (3) are connected in turn. The internal cavity of the model head part (1), the internal cavity of the model intermediate section (2) and the internal cavityof the model tail section (3) are communicated so as to form a model internal cavity. An internal cavity blind hole is arranged in the wall of the model internal cavity. A jet tip modification block (10) is installed on the external wall of any section of the model head part (1), the model intermediate section (2) and the model tail section (3). The installing hole of the jet tip modification block (10) is communicated with the internal cavity blind hole. A compressed gas cylinder (4) and a jet mechanism are installed in the model internal cavity. The compressed gas cylinder (4) is controlledto generate gas through the jet mechanism. The jet tip modification block (10) is jetted out under the effect of the gas. The disadvantages that the conventional free flight model cannot perform active flow control type test can be solved and the problems of gas source installation, guidance and triggering can be overcome.
Owner:CHINA ACAD OF AEROSPACE AERODYNAMICS
Surface high-temperature measurement device for nonmetallic heat resistant material plane test piece of hypersonic speed aircraft
InactiveCN102183312BAvoid trial failureAccurate measurementThermometers using electric/magnetic elementsUsing electrical meansMeasurement devicePre stressing
Owner:BEIHANG UNIV
Sizing agent discharging device
InactiveCN106976735AAccurate opening controlAccurate angle adjustmentLoading/unloadingEngineeringTest failure
The invention relates to a slurry feeder, which comprises a barrel body with a material inlet and a material outlet, a gate for adjusting the opening of the material outlet, a rotating shaft of the gate, a turntable and a turntable tightening screw. The discharge port is set on the barrel body through the pitch rotation of the ram shaft, and the turntable is fixed with the ram through the ram shaft. There is an arc-shaped slot on the turntable. physically. A kind of slurry feeder of the present invention, according to the grouting materials of different properties, adjusts the opening of the discharge port by rotating the turntable to drive the shutter, and then fixes the turntable by tightening the screws of the turntable. The angle of the plate is fixed, so as to fix the opening of the discharge port, adjust the flow rate of the grouting material, ensure the flow rate is controllable, and prevent the test from failing due to too fast or too slow feeding. At the same time, the structure of the grout discharger is simple, low cost.
Owner:ZHENGZHOU UNIV +1
Puncture exfoliation test puncture outfit, device and method
The invention relates to the technical field of quality inspection equipment of a polypropylene combined cover for an infusion container, in particular to a puncture exfoliation test puncture outfit.The puncture exfoliation test puncture outfit comprises a needle body. A needle head is arranged at one end of the needle body. A water injection channel is formed in the needle body. A water outlet is formed in the outer circular surface of the needle body and / or in the conical surface of the needle head, and the water outlet is communicated with the water injection channel. The invention furtherprovides a puncture exfoliation test device which comprises the puncture outfit and further comprises a main support, a cylindrical cam, a puncture outfit support, an injector and a water tank. A curve groove is formed in the cylindrical cam. The puncture outfit support is provided with a first roller. The injector comprises an injector cylinder, a piston and a piston support. The piston supportis provided with a second roller. The connecting line of the first roller and the second roller penetrates through the axis of the cylindrical cam. The test precision can be improved, and the test steps are simplified.
Owner:山东省医疗器械产品质量检验中心
Loading device for high temperature steam oxidation test
InactiveCN109903865AGuaranteed test accuracyAvoid trial failureNuclear energy generationNuclear monitoringEngineeringWater vapor
The invention discloses a loading device for a high temperature steam oxidation test. The loading device comprises a tray. The middle of the tray is provided with a first through hole, which penetrates two opposite surfaces of the tray. The periphery of the tray is provided with a protruded first annular step. The periphery of the first through hole is provided with a protruded second annular step. Between the first annular step and the second annular step, an annular positioning groove for accommodating an annular sample is formed. The positioning groove is provided with at least one second through hole. The positioning groove in the tray is used to accommodate an annular sample; the second through hole in the positioning groove is used for passing-through of water steam; in the test, theinner surface and the outer surface of the annular sample are both soaked in same high temperature steam, the accuracy of the test is guaranteed, moreover, the breaking of the annular sample during the oxidation process is avoided, and the failure of the test is prevented.
Owner:GUANGDONG NUCLEAR POWER JOINT VENTURE +3
Processing method of small-caliber coil room-temperature tensile sample
InactiveCN111982627AAvoid deformationAvoid trial failurePreparing sample for investigationStructural engineeringTest failure
The invention relates to a processing method of a small-caliber coil pipe room-temperature tensile sample. The method comprises the following steps: cutting a section from a coil pipe as a sample pipe, marking a point A and a point B in the length direction of the sample pipe by using a marking pen, and taking the sample pipe between the point A and the point B as a section to be measured; straightening the sample pipes on the left side of the point A and the right side of the point B to enable the left straightening section and the right straightening section to be coaxially arranged, and supporting the other end during straightening to ensure that the section to be measured is not deformed; cutting the left straightening section and the right straightening section, and reserving the clamping length needed during testing; and carrying out room-temperature tensile test on the sample pipe according to GB / T 228.1. According to the method disclosed by the invention, the end part of the sample pipe is straightened, so that the deformation of the section to be measured (namely a non-clamping part) of the tensile sample is avoided, and the accuracy of a result is ensured; and meanwhile,the problems of test failure and operation clamping difficulty are avoided.
Owner:江苏隆达超合金股份有限公司
Concrete plastic test mold auxiliary clamp
InactiveCN111531486AEasy to installEasy to replaceWork holdersStructural engineeringMechanical engineering
The invention discloses a concrete plastic test mold auxiliary clamp which comprises a magnetic base, wherein a force applying device is arranged on the top surface of the magnetic base. By matching the magnetic base, a releasing device, a locking device, a fastening device, the force applying device, a clamping device, a limiting device and a telescopic device, a plastic test mold can be fixed toa vibrating table stably. By matching the releasing device, the locking device, the fastening device, the force applying device and the clamping device, the auxiliary clamp can clamp and fix the plastic test mold from a side surface without being limited by shape and dimension of the plastic test mold, so that the auxiliary clamp is good in adaptability. By matching the clamping device and the telescopic device, the auxiliary clamp can clamp and fix the plastic test mold from the top surface, so that the auxiliary clamp is more stable, and the accuracy of a test result is improved. By matching the force applying device and the clamping device, it is convenient for an experimenter o mount and replace the plastic test mold, the test speed is increased, and the practicality of the concrete plastic test mold auxiliary clamp is improved.
Owner:江西省恒鑫环保建材有限公司
Preparation method and device for seabed natural gas hydrate
Owner:INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
Frame device for NDT test and application method thereof
The invention discloses a frame device for NDT test and application method thereof, the frame device for NCT test comprises a lifting component connected to the testing machine, wherein the below of the lifting component is provided with a bracket, and the two ends of the bracket are respectively connected with a top board and a base board, and the central axis in the vertical direction of the bracket coincides with the central axis of the top board and the base board, and coincides with the central axis in the vertical direction of the testing machine, the top board is connected with the lower surface of the lifting component, and the left and right sides of the upper surface of the top board and the base board are provided with a locating slot respectively for mounting the guide plate, the other end of the guide plate is installed in the guide rail of the testing machine, and the lower part of the base board is connected to a hammer blade. During the test, the lifting mechanism equipped for the testing machine hooks the lifting component and raises the hammer to the set height. When the sample is placed in position, the lifting mechanism disconnects the hook, the hammer body falls freely to impact the sample, after one test is completed, the sample is taken out for assessment of the crack arrest situation, all the connecting parts of the frame device are fixed by bolts, so the assembly and disassembly are simple and convenient, with reasonable design and cost-reducing.
Owner:NANJING IRON & STEEL CO LTD
A test method for the indirect effect of lightning on a special vehicle
ActiveCN105527514BSolve the problem of lack of vehicle lightning test configurationAddressing the lack of experimental methodsTesting electric installations on transportLightning rodStandard methods
Owner:BEIJING INST OF ASTRONAUTICAL SYST ENG +1
Testing device for ship single decks
The invention relates to the technical field of deck-strength testing devices, in particular to a testing device for ship single decks. The testing device comprises a laminate and clamping devices, a fixing plate is arranged on one end of the laminate, a plurality of fixing holes are formed in the fixing plate, a reinforcement plate is arranged on the other end of the laminate, and a plurality of reinforcement fins are connected between the reinforcement plate and the laminate; and the clamping devices are symmetrically arranged on the two side edges of the laminate, each clamping device comprises two clamping strips which are arranged in a pair and at the upper and lower portions of the corresponding side edge of the laminate correspondingly, a plurality of hole grooves are formed in each clamping strip, and the corresponding hole grooves in the two corresponding clamping strips are fixedly connected on the laminate in a bolt mode through bolts. According to the testing device for the ship single decks, the structure is reasonable, the testing device can be used on all ship single decks, and the situation that when a ship single grillage test is conducted, restraint is not enough or a boundary condition does not allow, as a result, the test fails is avoided; and high universality is achieved, the testing device can be used on deck grillages of any ship type and cabin according to size designs, and the problem that the test is difficult to conduct is solved.
Owner:WUHAN UNIV OF TECH
Liquid helium conveying system used for large-size multi-section liquid helium heat sinks and class converting method for large-size multi-section liquid helium heat sinks
InactiveCN103343884BAvoid trial failureAvoid the hassle of frequent Dewar replacementsAerodynamic testingPipeline systemsLiquid nitrogen coolingEngineering
Owner:BEIHANG UNIV
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