43results about How to "Avoid trial failure" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.