15results about How to "Solve stress" patented technology

The utility model relates to the technical field of ultrapure water equipment, in particular to a pipeline water circulation control device which comprises an operation table and a regulation and control mechanism. The regulation and control mechanism comprises a water storage unit, a main control box and a monitoring assembly, the water storage unit is fixedly connected with the operation table, the main control box is fixedly connected with the operation table, the monitoring assembly comprises a water inlet pipe, a first valve, a water supply pump, a water supply pipe, a water pressure sensor, a flow sensor and an auxiliary part, the water inlet pipe is fixedly connected with the water storage unit, and the first valve is fixedly connected with the water storage unit; the water supply pump is fixedly connected with the operation table, the water supply pipe is fixedly connected with the output end of the water supply pump, the water pressure sensor is fixedly connected with the water supply pipe, the flow sensor is fixedly connected with the water supply pipe, and the auxiliary part is fixedly connected with the water supply pipe, so that the water pressure and flow of pipeline water supply can be monitored in real time, the rotating speed of the water supply pump set is automatically adjusted, and energy consumption is optimized. The water quality stability is improved, and the breeding of bacteria and biological membranes is reduced.

This invention relates to the field of geological engineering technology, and in particular to an experimental method for determining the subcritical fracture toughness of fractures under well-closing conditions in shale reservoirs. The method comprises: obtaining a first shale sample and a second shale sample; placing the first shale sample in an experimental system and injecting fracturing fluid into the system until subcritical propagation occurs, then determining the peak pressure required for subcritical propagation; placing the second shale sample in the experimental system and injecting fracturing fluid to the preset well-closing pressure value, without injecting fracturing fluid, then determining whether subcritical propagation occurs in the second shale sample and the time required for subcritical propagation; and finally, calculating the corresponding subcritical fracture toughness. The advantage of this invention is that it enables the determination of whether subcritical propagation occurs in shale gas reservoirs under well-closing conditions, and the calculation of subcritical propagation fracture toughness, providing important theoretical basis and reference for the construction design and scheme optimization of deep shale gas reservoirs.

The present application relates to the technical field of material performance testing, and discloses a kind of test methods for evaluating the chemical solvent penetration resistance of reinforced plastic, comprising the following steps: constructing inverse transfer function to compensate platform lag, using historical strain data to predict the starting time of microcrack opening in the next cycle, combining platform inherent delay to calculate instruction sending time, based on stiffness attenuation rate calculated in real time to adaptively adjust the best disturbance frequency, using inverse transfer function to generate modified disturbance instruction and superimposed injection, deducting fluid viscous damping work previously calibrated from single cycle data to obtain effective dissipation density, determining failure end point based on the second derivative change of effective dissipation density sequence.The present application realizes the time synchronization of pressure wave and crack opening through prediction feedforward strategy, maintains deep penetration driving force using adaptive disturbance, and eliminates fluid damping interference through energy decoupling mechanism, improving the authenticity and result accuracy of stress-assisted solvent penetration test.

This utility model relates to the field of pipe support technology and discloses an adjustable support hanger for pump room pipe installation. It includes a support base with connecting arms on both sides. The upper side of the support base has an upward-facing cavity. A threaded rod is threadedly connected to the lower side of the support base. A lifting rod is fixedly connected to the upper end of the threaded rod. A conical block is rotatably connected to the lower outer wall of the lifting rod. Clamping plates are provided on both sides of the conical block. The opposing sides of the two clamping plates and the upper side of the lifting rod are used to fit against the outer wall of the pipe. This utility model, through the connecting arms, support base, threaded rod, conical block, lifting rod, clamping plates, and cavity, achieves the function of fixing pipes of different sizes. This solves the problem of needing to purchase hangers of corresponding sizes when installing pipes of different diameters, resulting in a large variety of spare parts and increased procurement costs and inventory pressure.

The utility model provides a manual hair removal cutter head floating assembly, which relates to the technical field of hair removal cutters and comprises a shell assembly, the shell assembly comprises a front clamping block, a blade support is movably connected in the front clamping block, a clamping frame is arranged on the outer side of the blade support, and a handle connecting seat is arranged on the outer side of the clamping frame; the floating attaching assembly comprises an inner transverse plate fixedly connected to the interior of the clamping frame, and elastic pieces are fixedly connected to the four corners of the outer side of the inner transverse plate; by means of the design, the effects of dynamic floating, multi-direction micro-inclined attaching and automatic resetting of the tool bit along with the curved surface of the skin are achieved, pressure is evenly buffered through elastic deformation of the elastic piece, and meanwhile stable sliding is guaranteed through clamping limiting of the clamping hook block and the installation clamping groove; therefore, the problems of difficulty in adapting to complex curved surfaces of human bodies, cutting residues caused by insufficient fitting and overlarge local pressure are solved.

The utility model relates to the technical field of rail transit vehicle equipment, in particular to a drainage device for a through channel, which mainly structurally comprises a liquid collecting container, at least one water inlet, at least one water outlet, at least one plug and at least one water outlet, the at least one plug closes the at least one water outlet in a pressure-tight manner, and the at least one buoyancy body is arranged in the collecting container and is connected with the at least one plug in a sliding and rotating manner, so that the at least one plug is moved from a position for closing the drainage pipe to a release position by utilizing buoyancy of the buoyancy body in the liquid; when enough liquid is collected in the collection container, the liquid can be automatically discharged, in addition, the plug always closes the drainage pipe, the water outlet is closed outwards, when the drainage device is installed on the frame of the hinged type vehicle through channel in use, and the cavity wall of the frame can serve as the side wall or the base of the collection container, the size of a single drainage device can be large enough, and the drainage device can be used for drainage of the hinged type vehicle through channel. And materials can be saved.

The application discloses a kind of high-strength wear-resistant nanometer composite fiber fabric and preparation method thereof, it is related to textile fabric technical field, after pretreatment, polyvinylpyrrolidone is dissolved in the mixed solution of deionized water and dimethylformamide with volume ratio of 7:3, after adding modified silicon dioxide and modified titanium dioxide, polyacrylonitrile is dissolved in dimethylformamide and added into premix solution drop by drop, complete spinning solution preparation after stirring and ultrasonic treatment, then the spinning solution is pretreated and added into syringe, and fiber fabric is prepared by electrospinning.The application is designed to have titanium dioxide and silicon dioxide modified, and then added into polyvinylpyrrolidone solution before adding polyacrylonitrile, which realizes the function of uniform dispersion of nanoparticles, solves the problems of nanoparticle agglomeration, interface bonding failure and solvent polarity mismatch, can make nanoparticles uniformly dispersed, eliminates stress concentration point, and improves the interface bonding strength of nanoparticles and matrix.

The application provides a refractory compression resistance detection device and method, and relates to the technical field of refractory detection. The detection device comprises a detection box body and an internal positioning assembly, a first heating assembly, a pressurizing assembly and a data acquisition assembly. The positioning assembly supports both ends of the sample to achieve suspended positioning through two positioning blocks. The heating assembly comprises a first heating device that can be lifted and is in contact with the surface of the sample to heat. The pressurizing rod of the pressurizing assembly vertically penetrates the heating device to press the center of the sample. The data acquisition assembly monitors the pressure, temperature and deformation in real time. The device realizes synchronous thermal loading through the cooperative work of the heating and pressurizing assemblies, avoids the thermal history interference problem caused by the separation of heating and pressurizing in the traditional method, can truly simulate the service state of the refractory in the high-temperature industrial environment, and provides accurate data support for the high-temperature compression resistance evaluation.

This application provides a method for the efficient recovery of vildagliptin from vildagliptin mother liquor, belonging to the field of medicinal chemistry technology. Using vildagliptin mother liquor containing disubstituted impurities as the treatment target, an N-dealkylation reaction is used to selectively remove additional alkyl substituents from the disubstituted impurities, directionally converting the impurities into the target product vildagliptin, thus achieving waste resource utilization. This application requires no complex equipment, uses mild reaction conditions, achieves a disubstituted impurity conversion rate ≥90%, increases the total vildagliptin yield by 5-8%, and does not generate new process impurities. Hydrogen peroxide, as a commonly used industrial oxidant, is inexpensive, and the only byproduct is water, significantly reducing environmental pressure. It is fully compatible with existing industrial production processes and has outstanding economic value and environmental significance.

The application provides a joint soft tissue balancing method and device, electronic equipment and storage medium, relates to the technical field of medical instruments, and comprises the following steps: fusing joint internal pressure data and joint pose data, establishing the correlation between joint contact force and joint space attitude; based on the joint gap displacement data collected during the operation of the patient and the corresponding joint contact force response data, a soft tissue stiffness model is constructed; based on the soft tissue stiffness model, the joint gap data, and the joint gap change amount, the joint contact force prediction value of the candidate prosthesis specification combination is determined; an optimization function is constructed, each specification combination of the candidate prosthesis is traversed, and the specification combination corresponding to the optimal value of the optimization function is taken as a recommended configuration scheme. The method and device provided by the application construct an intelligent closed-loop solution of "measurement-modeling-prediction-optimization" driven by data as a whole, and realize accurate, efficient and personalized joint soft tissue balancing.

The invention relates to the technical field of material performance testing, and discloses a testing method for evaluating the chemical solvent permeation resistance of reinforced plastics, which comprises the following steps: constructing an inverse transfer function to compensate platform lag, and predicting the starting time of microcrack opening in the next period by using historical strain data, the method comprises the following steps: calculating an instruction sending moment by combining inherent delay of a platform, adaptively adjusting an optimal disturbance frequency based on a stiffness attenuation rate calculated in real time, generating a correction disturbance instruction by using an inverse transfer function, performing superposition injection, and deducting pre-calibrated fluid viscous damping work from single-cycle data to obtain effective dissipation density. And determining a failure end point based on the second derivative change of the effective dissipation density sequence. According to the method, the time synchronization of pressure waves and crack opening is realized through a prediction feedforward strategy, the deep penetration driving force is maintained by utilizing self-adaptive disturbance, the fluid damping interference is eliminated through an energy decoupling mechanism, and the authenticity and the result accuracy of the stress-assisted solvent penetration test are improved.

The utility model relates to the technical field of orthopedic tights, and discloses a posture correcting belt which comprises a posture correcting body used for being attached to and supported on the back and hooping the waist and the abdomen to conduct adjustable connection at the connecting position. The first end of the Y-shaped pressurizing belt is connected with the posture correcting body at the upper end and the lower end of the shoulder blade in a forked mode, and the second end of the Y-shaped pressurizing belt extends from one side of the back to the other side of the back in an inclined state and is connected with the posture correcting body in a position-adjustable mode at the rear waist position; the shoulder blades are used for being flatly attached to the positions of the shoulder blades in a matched triangular shape so that the back of a wearer can be evenly stressed, the wearer can wear the shoulder blades comfortably, and better supporting force is provided for shoulder opening of the shoulder blades. The first end of the shoulder strap is connected with the posture correcting body at the shoulder position, the second end of the shoulder strap is connected with the posture correcting body at the waist position, and the shoulder strap and the posture correcting body are combined to form cuffs; and the shoulder straps and the Y-shaped pressurizing belts are symmetrically arranged on the posture correcting main body in groups. And through the design of the Y-shaped pressurizing belt and the shoulder belt, the practicability and the correction effect are improved.

The invention discloses hub motor shell press-fitting equipment, and relates to the technical field of press-fitting equipment.The hub motor shell press-fitting equipment is characterized in that a plurality of negative pressure holes are evenly formed in a placement table, so that a hub motor shell is rapidly and horizontally fixed to the placement table, and the bottom face of the hub motor shell is completely attached to the placement table through negative pressure adsorption; the risk of eccentricity of a stator core caused by inclined placement is eliminated, rigid fixation is provided through vacuum adsorption, displacement or shaking of a hub motor shell during downward pressing of a hydraulic machine is prevented, a limiting column is kept in a static state all the time to maintain an accurate initial positioning reference, and a movable plate freely drives a support and a rubber pressing head to move downwards to complete the press-fitting action. The positioning precision and the press-fitting quality are qualitatively improved, the elastic characteristic of the rubber pressing head ensures enough press-fitting force and avoids the damage risk caused by over-constraint, so that the stator core can be pressed into the hub motor shell in an optimal state, the process requirement of interference fit is perfectly met, and the production efficiency is improved. And the assembling quality and the performance consistency of the motor are obviously improved.

The invention relates to a valve difference ordering control method and system of a PEM hydrogen production temperature swing adsorption purification system. The method comprises the following steps: determining a current temperature swing adsorption working state; adjusting the working time limit value of the current temperature swing adsorption working state; judging whether a preset switching condition of the temperature swing adsorption working state is met or not in real time; switching to a next temperature swing adsorption working state; in each temperature swing adsorption working state switching process, state tables before and after valve switching are obtained; according to the state table before and after valve switching, the number of the valve needing state change is obtained; presetting a change sequence and change delay time of each valve of which the state needs to be changed; carrying out unreasonable filtering processing and correction on the preset change sequence and the preset change delay time; calculating an actual valve sequence and actual change delay time; and state change of all the valves needing state change is completed. According to the invention, the strong fluctuation of hydrogen pressure in the dryer switching process can be effectively alleviated.

The utility model discloses a jacket device for producing a biomass film, and relates to the technical field of biomass film production. The device comprises a supporting plate, an outer clamping sleeve and a heat preservation pipe, the outer clamping sleeve is fixed to the top of the supporting plate, an inner clamping sleeve is fixed to the edge of the inner side of the outer clamping sleeve, a spraying lip is fixed to the inner wall of the inner clamping sleeve, the two ends and the bottom between the outer clamping sleeve and the inner clamping sleeve are closed, a first sealing plate is fixed to one end of the spraying lip, and a second sealing plate is fixed to the other end of the spraying lip. A second sealing plate is fixed to the end, away from the first sealing plate, of the spraying lip, and two heat preservation pipes are fixed to the inner tops of the outer clamping sleeve and the inner clamping sleeve in a penetrating mode. Through the arrangement of the supporting plate, the outer jacket and the heat preservation pipe, the problems that the temperature in the biomass film production equipment needs to wait for a long time, material waste is easily caused, and secondly, the pressure and the temperature in the flowing process of a glue solution monitored by monitoring equipment are not accurate enough are solved.