52results about How to "Ensure experiment safety" patented technology

Disclosed are a network experiment system based on closed-loop control and an achieving method of the network experiment system. The system comprises an entity experiment system, a control module, a measuring module, an on-site computer, a video monitoring system, an on-site server and a remote client, the entity experiment system is connected with the on-site computer through the control module and the measuring module, the measuring module is used for measuring parameter signals of the entity experiment system, the control module receives a control signal of the on-site computer and performs loop control over the entity experiment system, the on-site computer and the video monitoring system are respectively connected with the on-site server through a wired or wireless network, the control information and display information of the entity experiment system are transmitted to the on-site server, and on-site video information of a laboratory is transmitted to the on-site server. The system has the advantage of remote control, the experiment is converted into entity operation from virtual simulation, in the actual operation, the video telepresence technology is matched, an experimenter feels personal on the scene, resource sharing is achieved, and the utilization rate of the equipment is greatly improved.

The invention relates to the field of biological electron microscopes, in particular to an operable observation recording device for a cryoelectron microscope. The operable observation recording device comprises a liquid nitrogen supply device, a vacuum device, an experiment carrier, a manual operation device and a low-temperature shooting recording device; the liquid nitrogen supply device is fixedly connected to the front end of the experiment carrier; the vacuum device is fixedly connected to the rear end of the experiment carrier; the liquid nitrogen supply device and the vacuum device areboth communicated with the experiment carrier; the manual operation device is fixedly connected to the left end of the experiment carrier; the low-temperature shooting recording equipment is arrangedat the upper end of the experiment carrier in a clearance fit manner; and the manual operation device and the low-temperature shooting recording device are both arranged in the experiment carrier. The operable observation recording device has the beneficial effects that a relatively vacuum environment is provided for a frozen biological sample, so that a freezing environment is guaranteed; through vacuum isolation, the experiment safety is guaranteed; and a shooting angle of the sample can be adjusted in a multi-angle mode in all aspects, so that the shooting quality is guaranteed, the comprehensive observation is guaranteed, and the influence of liquid nitrogen on shooting in a vaporization process is reduced.

The invention discloses 3D (Three Dimensional) printing equipment for printing an artificial heart and a bionic construction method of the artificial heart. A bionic construction method of an artificial organ is characterized in that the artificial organ comprises an artificial organ thin wall, a bionic blood vessel micro-flow channel, a cell tissue structural layer and a bionic extracellular matrix; the bionic construction method of the artificial organ comprises the following steps: S1: scanning a hospital image; S2: carrying out pathologic analysis according to acquired scanning information; S3: carrying out model layering treatment on a constructed reference STL model and a comparison STL model; S4: inputting slice data prepared by scattering into a 3D biological printing machine; S5:carrying out 3D printing; S6: constructing an organ culture environment. The invention further discloses the 3D printing equipment for realizing the method.

The invention discloses a punching abrasion testing device based on control energy, and makes up the deficiencies of multiple existing frictional wear testing devices and research methods. The punching abrasion testing device based on control energy mainly comprises a rack, a tangential linear motor, a test specimen fixture, an impact linear motor, an accurate magnetic grid sensor, an impact block, an electric sucking disk, a silicon steel sheet, a pressure sensor and a grating sensor, wherein the accurate magnetic grid sensor is used for feeding back the motion of the linear motor in real time; the electric sucking disk and the silicon steel sheet are used for controlling the impact block to move; the pressure sensor is used for collecting impact force and tangential force; and the grating sensor is used for collecting the motion of the impact block and the tangential motion of the test specimen. By use of the device, through design that a method of speed and quality control is adopted to control the energy of the impact block, impact and tangential compound abrasion is realized by a punching coupling motion way, and the defect that an existing tester researches a punching abrasion process only from the perspective of force is effectively overcome.

The invention discloses an electric equipment control circuit applied to supersonic combustion test. The electric equipment comprises a power supply and control button power supply module, an emergency stop circuit module, a pure manual button circuit module, a manual button circuit module, a pure manual circuit module, a manual-automatic integrated circuit module and an automatic control module. The electric equipment control circuit can be used for manually and automatically controlling various types of equipment applied to the supersonic combustion test, wherein a manual control function is suitable for debugging in a non-experimental process, and an automatic control function can be used for accurately controlling the time sequences of all types of equipment applied to an experiment, so that the supersonic combustion test can be conducted orderly and normally. In case of various emergency situations in the experimental process, the control circuit can be used for switching off dangerous equipment through an emergency stop button, so that experimental safety is ensured. If a main power supply is damaged due to the situations of short circuit and the like in an experimental process, the control circuit can be used for rapidly switching to a standby power supply to supply power to the equipment continuously, so that experiments can be conducted safely.

The invention provides a test table capable of simulating a lifting rotation operation platform in the outer rail ultrahigh working condition of a track. The test table comprises an upper frame and a base frame. The base frame is fixed on the ground. The upper frame is placed on the upper part of the base frame, and front and rear ends of the lower side are hinged with front and rear ends of the upper side of the base frame. Both sides of the upper frame are connected with both sides of the base frame through a buffer telescopic device, so that the upper frame can be tilted with respect to the base frame to simulate the lifting rotation operation platform in the outer rail ultrahigh working condition of the track. According to the invention, through the buffer telescopic device, the upper frame is tilted around a pin, and the lifting rotation operation platform fixed on the upper frame is also tilted to simulate the working condition of the lifting rotation operation platform in the actual work process under the outer rail ultrahigh condition of a curved section; leveling test of a leveling mechanism is carried out to test whether a product leveling mechanism can meet the technical requirement of automatic leveling; various parameters of the lifting rotation operation platform are comprehensively tested to simulate various conditions, so that products can meet delivery requirements; and the work is reliable.

The invention discloses a multi-physics field coupling oil paper insulation partial discharge detection system based on a UHF method. The multi-physics field coupling oil paper insulation partial discharge detection system is mainly composed of a multi-physics field coupling oil paper insulation partial discharge device, a UHF signal acquisition device, a data transmitting unit and a host displayunit, wherein the multi-physics field coupling oil paper insulation partial discharge device comprises a DC power supply, a harmonic power supply, a compound unit and an analog partial discharge device; output ends of the DC power supply and the harmonic power supply are connected with an input end of the compound unit; an output end of the compound unit is connected with an input end of the analog partial discharge device; the UHF signal acquisition device is in signal connection with the analog partial discharge device; and the data transmitting unit is used for effectively acquiring partialdischarge pulse signals, and transmits the partial discharge pulse signals to the host display unit in a wireless transmission mode. The multi-physics field coupling oil paper insulation partial discharge detection system realizes the simultaneous application of a DC voltage and a harmonic voltage, and can simulate the complicated working conditions of a valve side bushing of a converter transformer precisely.

The invention discloses a method for preparing a nano-diamond membrane by using methanol-argon. The method comprises the following steps: (1) carrying out surface defect pretreatment on a P-type silicon wafer with a polished single surface, (2) putting the silicon wafer as a substrate into a reaction cavity of microwave plasma chemical vapor deposition equipment, and adjusting the pressure intensity of the cavity, (3) introducing high-purity hydrogen, exciting plasmas to heat the silicon wafer, removing organic matters and impurities on the surface, and then slowly reducing the hydrogen flow until the hydrogen flow is closed, (4) enabling the argon flow to pass through a methanol solution diffusion source to form methanol-argon mixed gas, and enabling the methanol-argon mixed gas to enterthe reaction cavity, and (5) adjusting reaction process parameters to form plasma, and beginning to deposit a nano-diamond membrane on the silicon wafer. The nanoscale diamond membrane is prepared byadopting a microwave plasma chemical vapor deposition method, the use of flammable and combustible gas is completely avoided, the nanoscale diamond membrane is successfully prepared under the condition of no direct participation of hydrogen, the preparation cost of the nanoscale diamond membrane is reduced, and the experimental safety in the preparation process is greatly ensured.

The invention discloses a novel natural gas diffusion coefficient measurement experiment device which mainly comprises a novel rock core holder, a differential pressure sensor, a pressure gauge, a multi-way valve, a confining pressure pump, a vacuum pump, a hydrocarbon gas source, a nitrogen gas source, a gas chromatograph, an intermediate container, a sample cavity, a pressure stabilizing deviceand a pressure sensing alarm device. The rubber sleeve of the novel rock core holder can prevent the phenomenon that the rock core is clamped in the holder due to improper operation when the rock coreis replaced, the pressure stabilizing device is connected with the sample cavity to ensure that after the sampling is finished, the internal pressure of the cavity is kept stable, one experimental variable is reduced, and the experimental result is more accurate and reliable. The pressure sensing alarm device presets a pressure lower limit value before the experiment is carried out, if the equipment leaks air during the experiment, the pressure is reduced to a lower limit value, the sensing device can sense and send a warning to the mobile equipment of the experimenter in time, which is of great significance to ensure safe performance of the experiment.

The invention discloses a reverse starting test method and device for a traction system. The method comprises the following steps that: S1, a test accompanying traction system and a to-be-tested traction system are connected with each other, so that the a reverse starting test system is constructed, the test accompanying traction system simulates the load of the to-be-tested traction system; S2, when a test is started, the reverse of the test accompanying traction system is controlled to be started, and the test accompanying traction system is controlled to operate according to control parameters calculated according to operation conditions required by the test; S3, when the test accompanying traction system operates under a specified operation working condition, the to-be-tested tractionsystem is started, a forward torque is applied onto the to-be-tested traction system, and the to-be-tested traction system and the test accompanying traction system are controlled to realize reverse twin trawling according to the torque direction of the test accompanying traction system, so that a vehicle reverse starting working condition can be simulated; and S4, the operation states of the to-be-tested traction system and the test accompanying traction system are monitored, a test result is judged. The method has the advantages of simple test operation, low implementation cost, high test reliability, good test performance and the like.

The invention discloses an ultra-high-frequency-method-based coupling oil-paper-insulation partial discharge detection system in a composite electric field. The detection system is composed of a composite electric field coupling oil-paper-insulated partial discharge unit, a UHF signal acquisition unit, a signal transmission unit and a host display unit. The partial discharge unit consists of a direct-current power source, a pulse power source, a voltage distribution assembly, and an analog partial discharge device; the output terminals of the direct-current power source and the pulse power source are connected to the input terminal of the voltage distribution assembly; the output terminal of the voltage distribution assembly is connected to the input terminal of the analog partial discharge device; the output terminal of the analog partial discharge device is connected to the input terminal of the UHF signal acquisition unit; output terminals of a voltage feedback amplification circuitand a voltage stabilization circuit are connected to an input terminal of a signal transmission unit; and the output terminal of the signal transmission unit is connected to the input terminal of thehost display unit. Therefore, complicated work conditions of a valve-side casing tube of a converter transformer are simulated accurately; and the operation is done quickly and safely.

The invention discloses a testing device and a testing method of an intelligent disconnecting switch and a circuit breaker. The testing device comprises the components of a single-chip microcomputer,a voltage acquisition circuit, a current acquisition circuit, a switch amount isolation acquisition circuit, a driving output circuit, a starting-stopping button circuit, a multifunctional turn buttoncircuit, a liquid crystal display device circuit, an expanded static memory circuit and an isolated communication circuit, wherein the voltage acquisition circuit, the current acquisition circuit, the switch amount isolation acquisition circuit, the driving output circuit, the starting-stopping button circuit, the multifunctional turn button circuit and the liquid crystal display device circuit are respectively connected with the single-chip microcomputer electrically; and the expanded static memory circuit and the isolated communication circuit are electrically connected with the single-chipmicrocomputer. The switch amount isolation acquisition circuit acquires a voltage signal at a switch position. Through a protective circuit which is composed of self-recovery fuse and a transient protecting diode, the voltage signal is input into an isolated optical coupler through a current limiting resistor and a filtering capacitor, thereby ensuring no burndown of rear devices. The testing device and the testing method have beneficial effects of accurately measuring switching-on and switching-off operation time of the disconnecting switch and the circuit breaker, and satisfying requirementof a railway power grid to switching-on time and switching-off time of the disconnecting switch and the circuit breaker.

The invention discloses a gaseous medium dynamic caving coal and powder flowback mechanism simulation experimental device and method. The experimental device comprises a multi-gas high-pressure gas injection child device, a main body device and a coal powder collecting child device. The main body device at least comprises a simulation drill pipe and a pressure chamber, coal samples are placed in an inner cavity of the pressure chamber, and the simulation drill pipe is arranged in the inner cavity. The multi-gas high-pressure gas injection child device is connected to the main body device through a gas injection pipeline, and the gas injection pipeline extends into the pressure chamber. The coal powder collecting child device comprises a dust collector, a coal powder collecting tank and a water collecting tank, the coal powder collecting tank is connected to the pressure chamber through a discharge pipeline, the dust collector is arranged above the coal powder collecting tank, the coalpowder collecting tank is provided with a drainage pipe, and the drainage pipe discharges water into the water collecting tank. Therefore, in order to deeply study the gaseous medium dynamic caving and coal powder flowback mechanism and optimize process parameters, the gaseous medium dynamic caving and coal powder flowback mechanism simulation experimental device and method aim at the ''double outburst'' problem in a broken and soft outbrust coal seam mining area, and a theoretical basis for the selection of a gaseous medium dynamic caving construction process and key parameters of the processis provided.

The invention relates to an emergency protector, in particular to a fault emergency protector for a low-oxygen animal rearing cabin, which is used for preventing excessive oxygen deficiency and power failure of the animal rearing cabin. The emergency protector is provided with an air storage unit, a power failure detection unit, an animal rearing cabin oxygen deficiency detection unit and a central processing unit, wherein the central processing unit is capable of monitoring oxygen content of the air in the animal rearing cabin and power supply conditions of mains supply, and controlling a valve to open a pipe through a valve drive unit to deliver the air in the air storage unit into the animal rearing cabin once ultralow oxygen content of the air in the animal cage or failure of the mains supply is detected, and accordingly, the oxygen content of the air in the animal rearing cabin can be maintained for a certain period of time, and death of experimental animals due to excessive oxygen deficiency caused by power failure or vent channel blockage of the animal rearing cabin can be avoided.

The invention discloses a mechanical sealing testing device and method for experimental teaching, and belongs to the technical field of sealing testing. The mechanical sealing testing device comprisesa rack, a computer, a motor, a torque rotating speed measuring instrument, a bearing pedestal, a transmission shaft, a sealing cavity, an oil tank, a bidirectional hydraulic pump and a pipeline; thecomputer, the motor, the torque rotating speed measuring instrument, the bearing pedestal, the transmission shaft and the sealing cavity are mounted on the rack; the motor, the torque rotating speed measuring instrument and the transmission shaft are connected in sequence; the transmission shaft is connected with the sealing cavity through a cotter pin and a convex key; the opening position is connected with an oil inlet and an oil outlet of the sealing cavity through the pipeline; the rack is further provided with the bidirectional hydraulic pump and the oil tank; and the oil tank, the bidirectional hydraulic pump and the sealing cavity are sequentially connected into a loop through the pipelines. The sealing performance of the testing device is improved, the dismounting convenience of the device in the sealing cavity is improved, the replaceable design is realized, and the experimental test can be performed for more mechanical sealing devices.

The present invention discloses a controlled pressurization chromatography system and a chromatography method thereof. The system comprises: a liquid storage device provided with a liquid inlet, a gas inlet and a first liquid outlet, wherein the first liquid outlet position is provided with a first flow rate controller and a sample injector; a pressurization device provided with a pressurized gas outlet, wherein the pressurized gas outlet is connected to the gas inlet, and a pressure regulator and a pressure display device are arranged at the pressurized gas outlet position; a buffer device connected to the gas inlet and the pressurized gas outlet; and a chromatography device, wherein a chromatography space is limited inside the chromatography device, a filler layer is arranged inside the chromatography space, the sample injector is embedded into the chromatography space from the upper end of the chromatography device and is positioned above the filler layer, the lower end of the chromatography device is provided with a second liquid outlet, and a second flow rate controller is arranged at the second liquid outlet position. With the technical scheme of the present invention, the pressure controlling during the elution process can be achieved so as to ensure the safety of the experiment; and with the use of the sample injector, the batched adding of the sample to be separated and the eluent can be achieved so as to significantly improve the separation efficiency of the sample to be separated.

The invention relates to a cell detection system for main air pollutant ozone toxicity. The cell detection system for the main air pollutant ozone toxicity is characterized in that the input end of anozone generator is connected with the output end of an oxygen source through a pipeline; an oxygen pressure-reducing valve and an oxygen electromagnetic valve are arranged in sequence on the pipelinefrom the oxygen source to the ozone generator; an air compressor and the output end of the ozone generator are connected with the air inlet of a mixing chamber through the pipeline respectively; theair outlet of the mixing chamber is connected with the air inlet of a carbon dioxide incubator through the pipeline; a waste gas collection device is connected with the air outlet of the carbon dioxide incubator through the pipeline; an ultraviolet absorption ozone analysis instrument is electrically connected with the ozone generator and the oxygen electromagnetic valve; and the ultraviolet absorption ozone analysis instrument is used for sampling and analyzing air inside the carbon dioxide incubator, and outputting an electric signal for controlling the ozone generation amount of the ozone generator and the oxygen flow amount of the oxygen electromagnetic valve. By adopting the cell detection system, the ozone concentration can be comprehended accurately in order to actually and accurately determine the living states of cells under different simulated atmosphere environment ozone concentrations.

Supporting legs are welded to the bottom end of a reaction kettle tank, a feeding assembly is installed on the end face of one side of the reaction kettle tank, the outer side of the reaction kettle tank is connected with a feeding pipe, the input end of the feeding pipe is connected with a material collecting box, the outer side of the material collecting box is connected with a material collecting pipe, and the outer side of the material collecting pipe is sleeved with a bottom control valve. The input end of the material collecting pipe is communicated with a raw material box, the outer side of the top end of the raw material box is in threaded connection with a closed threaded cover, and various different chemical raw materials are injected into the inner side of the material collecting box from the interior of the raw material box through external high-pressure gas and then are injected into the inner wall of the reaction kettle tank through the feeding pipe, so that charging is not stopped when the reaction kettle tank works; furthermore, the working efficiency of the reaction kettle tank is improved, the working time delayed by feeding is shortened, chemical raw materials can be prevented from being in contact with air, toxic gas is prevented from being spread, and the operation safety of workers and experimenters is protected.

This invention relates to a computer controlling device of performance testing of hydric material storage equipped with computer program, and is composed of the main body of computer with controlling programs. The mainframe collects the data of the temperature and the pressure transmitters through the program and the multi-functional data collecting card, and controls the switches of the electrical valve and the electromagnetic valve. And meanwhile, it sends the contact signal to the counting relay. The control program is composed of PCT curve testing module, the temperature and pressure history curve module, the dynamics testing module, the cycle life-span testing module and exiting module. This invention has strong automatic capacity, high reliability, complete testing parameters, high precision of testing, wide applying area, low cost.

The invention discloses a carrying task labor intensity load measurement experiment system and method. The system is formed by two adjustable placing benches, variable-weight carrying boxes and carrying information acquisition devices. The adjustable placing benches and the variable-weight carrying boxes are used for simulating carrying tasks under various work conditions; and the carrying information acquisition devices are used for synchronously collecting and simulating carrying frequency and carrying height in the carrying task process. The device can carry out unified planning and collection on key elements, such as carrying height, carrying frequency and carrying weight, for calculation of labor intensity under a specific carrying task, thereby reducing experiment errors and facilitating carrying out the experiment. The system and method can calculate the amount of heat produced by a human body in unit time, and determine labor intensity load of an actual carrying task based on design of carrying distance, carrying weight and carrying time and according to the collected carrying frequency.

The invention discloses an irradiation experimental device for a pulse reactor. A radial duct is formed in the pulse reactor. The radial duct comprises a duct outlet. A neutron trap is arranged inside the radial duct; a shielding body is arranged outside the radial duct; and a passing hole is formed in the shielding body. The irradiation experimental device comprises a movable shielding cover, a shielding storage rack, a double-screw synchronous drive mechanism and an elevator, wherein the shielding storage rack is arranged at a position, which avoids an area of the passing hole, above the shielding body; the shielding storage rack is used for placing shielding irradiation cavities of different specifications; the elevator comprises an elevator car; and when the elevator car is located in the bottom-most layer, an opening of the elevator car is opposite to the duct outlet. According to the irradiation experimental device disclosed by the invention, the double-screw synchronous drive mechanism is used to drive the elevator car to move, so that automatic transfer and storage can be achieved in the shielding storage rack and the duct outlet, thereby achieving replacement and storage of a plurality of sets of experimental devices in a small experimental space, and also ensuring the radiation protection safety of laboratory personnel.

The invention relates to a super-miniature reactor for GC-MS headspace sampling qualitative analysis. The super-miniature reactor comprises a GC-MS headspace bottle, a reagent container, a floating raft, a powerful magnet and a pressure indication tube, wherein the reagent container is arranged in the headspace bottle and is used for containing reagents, the floating raft is used for containing samples and is arranged in the reagent container, an iron core is arranged in the floating raft, the powerful magnet is located at the bottom of the headspace bottle, and the pressure indication tube is fixed in the reagent container. Compared with the prior art, the super-miniature reactor has the advantages that micro-samples can react with water, acid or other chemical reagents in the closed headspace bottle, and gas produced in the reaction can be directly introduced into a gas chromatograph-mass spectrometer to be analyzed.

The invention discloses a hydrostatic testing system and method for a water-cooling converter. The system comprises a water circulation cooling device, a water supply pipe, a return pipe, a tested device and an exhaust valve; the water supply end of the water circulation cooling device is connected with the water supply end of the tested device through the water supply pipe, the water outlet end of the tested device is connected with the return end of the water circulation cooling device through the return pipe, the exhaust valve is installed on the return pipe, a main water inlet valve is arranged at the end, close to the water circulation cooling device, of the water supply pipe, and a main water outlet valve is arranged at the end, close to the water circulation cooing device, of the return pipe; a pressure testing pump is arranged on the side, far away from the water circulation cooling device, of the main water inlet valve arranged on the water supply pipe. The hydrostatic testing system and method have the advantages that pressure testing can be conducted rapidly and efficiently by utilizing existing devices and pipelines of an existing water circulation cooling system, all the devices are controlled through valves, pipe burst and water spray phenomena caused by excessive pressure can be effectively prevented, and test conversion between a hydrostatic test and a water circulation temperature-rise test can be conducted conveniently.

The invention discloses a multifunctional foam generation and foam performance testing device. A device main body is a glass tube (15) sleeved with a water bath casing pipe (16); the lower part of theglass tube (15) is connected with a glass funnel (12) through threads; the lower part of the glass funnel (12) is connected with a gas pipeline (4); the gas pipeline (4) is sequentially connected with a three-way valve (11), a gas flow meter (10), a pressure releasing valve, (9), a buffer tank (8), a one-way valve (7), a first gate valve (6), a pressure stabilizing valve (5), a pressure meter (3)and a high-pressure air cylinder (1); and an air valve (2) is arranged above the high-pressure air cylinder (1). According to the testing device, the flow and pressure of the gas are controlled by virtue of a valve system, so that relatively high safety is realized; the foaming number of times for generating foams can be arbitrarily adjusted; the melting effects caused by different temperature tothe foam can be researched; the influences caused by the size and distribution of the foam to the foaming characteristic and the stability can be researched; and the device is simple and convenient to operate.

The invention discloses a digital multifunctional power electronic technology teaching experiment platform, and relates to the technical field of power electronics. The experiment platform comprises aprotection circuit, a sampling circuit, a driving circuit, a DSP core control board, a PC and a power electronic integrated main circuit. The power electronic integrated main circuit comprises a single-phase half-wave controllable rectifying circuit, a single-phase bridge type controllable rectifying circuit, a single-phase PWM rectifying circuit, a PWM generating and driving circuit, a Boost circuit, a Buck circuit, a square wave inverter circuit and an SPWM inverter circuit, and a switch can be shifted according to needs to complete different experiments. According to the experiment platform, a plurality of experiment circuits are integrated together; the comprehensiveness and the integration degree of the experiment platform are improved, the experiment functions of almost all experiment subjects in the basic experiment teaching process can be achieved in cooperation with a corresponding experiment method, the problem that equipment characteristics cannot be changed at will in traditional basic experiment teaching is solved, and the experiment platform is convenient and flexible to use.

The invention provides a pseudo-dynamic loading system safety support platform. The platform comprises a support pallet which is used for supporting a pseudo-dynamic loading system actuator, a height adjustment device which is used for adjusting the height of the support pallet, a support frame which is used for arranging the height adjustment device, a moving device which is used for moving the support frame, and a load retracting device which is used for transmitting force transmitted from the support frame to the ground. The support pallet is connected with the height adjustment device. The height adjustment device is arranged on the support frame. The load retracting device and the moving device are arranged at the bottom of the support frame. The platform provided by the invention has the advantages of high operability, flexibility and applicability, reasonable structure and clear force transmission path. The security of the pseudo-dynamic loading system is enhanced.

This invention relates to a computer controlling device of performance testing of hydric material storage equipped with computer program, and is composed of the main body of computer with controlling programs. The mainframe collects the data of the temperature and the pressure transmitters through the program and the multi-functional data collecting card, and controls the switches of the electrical valve and the electromagnetic valve. And meanwhile, it sends the contact signal to the counting relay. The control program is composed of PCT curve testing module, the temperature and pressure history curve module, the dynamics testing module, the cycle life-span testing module and exiting module. This invention has strong automatic capacity, high reliability, complete testing parameters, high precision of testing, wide applying area, low cost.

The present invention discloses a new experimental device for measuring a diffusion coefficient of natural gas, mainly including a new core holder, a differential pressure sensor, pressure gauges, multiport valves, a confining pressure pump, a vacuum pump, a hydrocarbon gas source, a nitrogen gas source, a gas chromatograph, an intermediate container, sample chambers, a pressure stabilizing device, and pressure-sensitive alarm devices. A rubber sleeve of the new core holder can prevent a core from being stuck in the holder during core replacement due to an improper operation. The configured pressure stabilizing device is connected to the sample chambers, to ensure stable internal pressure in the chambers after sampling. In this way, one experimental variable is omitted, and an experimental result is more accurate and reliable. If gas leakage occurs. A sensor device can sense the gas leakage in time and sends an alarm to a mobile device of an experimenter.

The invention relates to a novel tissue culture tool rack. According to the technical scheme, the novel tissue culture tool rack comprises a base, a long-strip-shaped hole which is used for fixing scissors, a round hole which is used for fixing tweezers and a scalpel and a round hole body which is used for fixing an alcohol lamp, and the holes of a fixing tool are all located in the base. The novel tissue culture tool rack has the advantages that the holes with different shapes and sizes are formed, it is guaranteed that tissue culture tools of various types can be inversely cooled, the toolscannot be contaminated due to incomplete disinfection of the tool rack while the tools cannot slide off, convenience and high efficiency are achieved, and time can be saved; and the alcohol lamp can be fixed, so that the danger caused by careless knock-down of the alcohol lamp in the experiment process is prevented, and it is guaranteed that the experiment is carried out safely.

A device and method for simulating an experimental device and method for gas medium dynamic cavitation pulverized coal flowback mechanism. The experimental device includes a multi-gas high-pressure gas injection sub-device, a main device and a pulverized coal collection sub-device. The main device includes at least a simulated drill pipe and a pressure chamber , coal samples are placed in the inner cavity of the pressure chamber, the simulated drill pipe is arranged in the inner cavity, the multi-gas high-pressure gas injection sub-device is connected to the main device through the gas injection pipeline, and the gas injection pipeline extends into the pressure chamber, so The pulverized coal collection sub-device includes a dust collector, a pulverized coal collection pool and a sump. The pulverized coal collection pool is connected to the pressure chamber through a blowout pipeline, and a dust collector is arranged above it. The pulverized coal collection pool is provided with a drainage system. The drainage pipe discharges water into the catchment pool; thus, the present invention aims at the problem of "double outbursts" in the broken soft outburst coal seam mining area, in order to further study the gas medium dynamic cavitation, pulverized coal flowback mechanism and optimize the process parameters. It provides a theoretical basis for the gas medium dynamic cavitation construction technology and the selection of key parameters.