50results about How to "To achieve the purpose of the experiment" patented technology

The invention discloses an experiment device for simulating retention of in-pile melts obtained by melting of a reactor core of a nuclear reactor and an experiment method. The device consists of a copper heating section, a quartz glass component and a data measurement system. According to the experiment device, a melt hard shell of the reactor core is simulated through a semispherical copper ball shell; decay heat is simulated through a spiral heating wire embedded into the semispherical shell; the inner wall surface of a lower enclosure of a pressure container is simulated through quartz glass, and therefore, a flowing heat exchange phenomenon of a narrow gap between the inner wall surface of the pressure container of the reactor and the melt hard shell can be simulated, and the influence on the retention of the in-pile melts caused by flowing of water in the narrow gap can be researched. The experiment device has the advantages of visible experiment process, high experiment precision, high safety, easiness in operation and the like. A running practice shows that the experiment device runs stably and can thoroughly meet a design requirement.

The invention provides a box beam combined bending moment test mechanism. The mechanism comprises a support substrate arranged on the ground, two groups of shaft support seats arranged on left and right ends of the substrate, left and right connection bridges respectively arranged on the two groups of shaft supports, and loading structures arranged on upper ends of the left and right connection bridges. Discs are respectively arranged on the right end of the left connection bridge and the left end of the right connection bridge. A box beam test piece is welded between the discs. The loading structures are arranged on the box beam test piece. According to the invention, combined bending moment test and ultimate strength test under the static strength condition of the box beam can be achieved; and two ends of a model test segment are connected with the connection bridges through the discs and the upper parts are connected with the loading structures, so it is ensured that bending effects are generated under pressure in different angels, demanded experiment data and experiment phenomena are acquired and an experiment objective is achieved.

The invention provides a test device for simulating a dike closure hydraulic process and a method and belongs to the field of physical model experiments of hydraulics. The test device for simulating a dike closure hydraulic process comprises a testing module, a reservoir capacity change module, a data collecting module and a control module; the testing module consists of all basic testing components; the reservoir capacity change module is externally connected to the testing module; the data collection module is supported by the testing module; the control module is used for controlling a testing process. The method of the test device for simulating a dike closure hydraulic process comprises a device preparation process, a tide level adjusting process, a testing and parameter recording process, a post-testing processing process, a working condition changing testing process, and testing completion and device arrangement. The device has the advantages of simple structure, close connection of components and high testing process efficiency and is widely applicable to many working conditions; the testing design is remarkably superior to the conventional dike closure hydraulic physical model testing design.

The invention discloses a foamed aluminum tension detection fixture which comprises a tension component, a fixture component and a tension rotating handle, wherein the tension component comprises a body and a tension clamp; a mounting hole is formed at the upper end of the body; the tension rotating handle is arranged in the mounting hole; the tension clamp is arranged at the lower end of the body; the tension clamp is of a trident type; plugholes are formed at the two ends of the fixture component; the fixture component is connected with the tension clamp by a bolt. The fixture prevents a foamed aluminum composite from influence of different material properties; during tension, when a tensile force increases continuously, no falling happens; structural damages are not caused; an experiment purpose can be reached efficiently; experimental data of tensile strength of foamed aluminum is obtained; the fixture is simple in structure and convenient to mount at the same time.

The invention provides?a simulation human body model for X-ray basic characteristic experiment. The simulation human-body model includes a simulation human body profile prepared by materials such as silica gel, wherein a human body skeleton and viscera prepared by PVC plastics are arranged in the simulation human body model, an electroscope with a built-in foil sheet is arranged behind a head model on the human body model, clothing covers the human body model, and a photography pocket and a mesh bag are arranged in the rear of the clothing. The simulation human body model can be used for verifying basic X-ray characteristics in medical imaging experimental teaching; the human body model is equipment with the skeleton and viscera in the internal, and simulated skin and muscles in the external layer, and is covered with the clothing, so that required imaging effect under X-rays can be reached, basic X-ray characteristics including penetrating effect, ionization effect, fluorescent effect and photosensitive effect can be verified, and the simulation human-body model for X-ray basic characteristic experiment is helpful for realizing experimental goals.

The invention discloses an electric soldering iron heating type rapid thermal fatigue experimental device and method. The electric soldering iron heating type rapid thermal fatigue experimental devicecomprises a heating system, a refrigerating system, a cooling liquid circulating system and an electric warning counter. The heating system comprises a heating power supply and a welding mouth, a sample placing point is arranged at the side end of the welding mouth, and a first circulating time relay of heating and pause time provided with a heating power supply is connected to the heating powersupply; the refrigerating system comprises a water tank and thermal resistance, a refrigerating piece is arranged at the bottom of the water tank, and a temperature controller is arranged outside thewater tank; and the cooling liquid circulating system comprises cooling liquid filled in the water tank and a water pump connected with the water tank, a cooling liquid circulating pipe is arranged onthe water tank, the middle of the cooling liquid circulating pipe is fixedly connected with the welding mouth, and a second circulating time relay capable of setting cooling time and cooling pause time of a sample is further connected to the water pump. The electric soldering iron heating type rapid thermal fatigue experimental device and method have the advantages of small volume, low cost and high temperature rising speed.

The invention discloses an EDA teaching experimental device which comprises an FPGA (Field Programmable Gate Array) module, a buzzer module, a matrix keyboard module, a dial switch module, a display module, a serial communication module, an analog-to-digital conversion module, a digital-to-analog conversion module, a real-time clock module, a 12C memory, a motor drive module and the like. Studentscan select the total or partial modules to perform circuit design so as to achieve the experimental aim. When the circuit design is performed, hardware design ability can be exercised, and the hardware can be subjected to the same control and processing by virtue of different software and different languages. The troubleshooting ability can be further exercised in the debugging process. The students can set corresponding upper computers according to requirements, so that the practice abilities of the students can be effectively improved. Due to the arrangement of an extended interface conversion module, the FPGA module is separated from the other modules, and the FPGA chip possibly needs to be replaced or updated in the subsequent experimental process. Due to the separation arrangement, replacement and update can be facilitated, the service life of the device is prolonged, and convenience can be provided for the students in expanding other baseboards.

The invention discloses a gravity and friction relationship test device. The device comprises a support device installed on a stand column, a gravity device placed on a light pull sheet and a variable force device assembled on a pedestal. The support device comprises a support sheet, a light pull sheet, a bayonet and a fastening bolt. The gravity device comprises a container, a container cover and a magnet. The variable force device comprises an electromagnet, a slide rheostat, a power supply, a switch, a slip sheet and a wire. Left block needle and right block needle are symmetrically arranged on the support sheet of the support device. A container cover button, a container cover thread and a container cover hole are formed on the container cover. According to the invention, the gravity and friction relationship test device has the advantages that test purpose is achieved, the structure is simple, the effect is visual, the stability is good, the repeatability is strong, the conclusion is clear and the physical knowledge learning of students is facilitated.

The invention discloses a steel rail milling and grinding cutter which comprises a milling cutter disc. The milling cutter disc is provided with multiple milling cutter sets, each milling cutter set is provided with two rows of milling cutters, and each row of milling cutters comprises square milling and grinding blades and arc-shaped milling and grinding blades. The square milling and grinding blades in each row of milling cutters are arranged in the axial direction of the milling cutter disc, and the square milling and grinding blades in every two rows of milling cutters are arranged in a staggered manner, so that the projections of cutting edges of the square milling and grinding blades in every two rows of milling cutters in the radial direction of the milling cutter disc form a continuous first cutting edge line. The arc-shaped milling and grinding blades in every two rows of milling cutters are arranged in the axial direction of the milling cutter disc and are mutually staggered, so that the projections of cutting edges of the arc-shaped milling and grinding blades in every two rows of milling cutters in the radial direction of the milling cutter disc form a continuous second cutting edge line. The first cutting edge lines and the second cutting edge lines are mutually continuous to form a steel rail milling and grinding line. The square milling and grinding blades and the arc-shaped milling and grinding blades are reasonably arranged, so that the contact surface with a steel rail is smoother during milling and grinding, the milling and grinding effect is good, and the blades and the rail can be well protected.

The invention provides a laboratory fuming cupboard energy-saving lighting system. The laboratory fuming cupboard energy-saving lighting system comprises an experiment cabinet body, an experiment table arranged in the experiment cabinet body, a suction opening, a wind wheel, an electric generator, a rectifier, a storage battery and a lighting lamp, wherein the suction opening, the wind wheel, theelectric generator, the rectifier, the storage battery and the lighting lamp are arranged above the experiment table, the suction opening is formed in the center of the top of the experiment cabinet body, and is connected with a ventilation pipeline, the ventilation pipeline is externally connected with a ventilation device, the wind wheel is arranged in the suction opening, the wind wheel drivesthe electric generator to generate electricity, the electric generator is connected with the alternating-current power input end of the rectifier, the direct-current power output end of the rectifieris connected with the storage battery, the storage battery is connected with the lighting lamp, the lighting lamp comprises four lamp tubes arranged on the periphery of the upper portion of the experiment cabinet body in a surrounding manner, and a reflecting plate is arranged over the four lamp tubes. The laboratory fuming cupboard energy-saving lighting system is scientific in design, capable ofrecycling energy, and saving energy and low in experiment cost.

The invention relates to a low-water pressure sealing performance test method and system for a high-water pressure solenoid valve. The low-water pressure sealing performance test method comprises thefollowing steps: connecting the to-be-tested high-water pressure solenoid valve with a straight-through valve of a water tank through a first water pipe, connecting a needle head or a fine tube with an internal diameter of no greater than 1.5 mm through a second water pipe from a water outlet of the high-water pressure solenoid valve; injecting water into the water tank, wherein the height of thewater surface away from the straight-through valve is not lower than 70 mm and is not higher than 330 mm; opening the high-water pressure solenoid valve, opening the straight-through valve and closingthe high-water pressure solenoid valve after the water is drained to air in a pipeline between the straight-through valve and the needle head or the fine tube; after the high-water pressure solenoidvalve is opened for a first preset time, closing high-water pressure solenoid valve for a second preset time, repeatedly opening and closing the high-water pressure solenoid valve for a preset numberof times; opening and closing high-water pressure solenoid valve once and acquiring the water dripped out from the needle head or the fine tube in a closed state; measuring the volume of the water acquired from the needle head or the fine tube to judge the low-water pressure sealing performance of the high-water pressure solenoid valve and realize the low-water pressure sealing performance test.

The invention relates to a gas base permeation reactor, which belongs to the technical field of metallurgy. A cool water inlet and a cool water outlet are arranged on a water cooled cover of the reactor, a reducing gas inlet pipe is arranged on the bottom of a reactor main body, one end of the reducing gas inlet pipe extends into the bottom in the reactor main body, the bottom of the reactor main body is provided with a sealing material, the sealing material is connected with the bottom of a large loading sleeve, air inlet holes are formed in the lateral wall of the lower part of the large loading sleeve along the circumference direction, and at least one small sleeve for reducing mineral powder is arranged in the large loading sleeve. The reducing gas deeply permeates and enters into the rare earth concentrate powder in gaps of a multi-layer steel net, the effective contact area of the reducing gas and the rare earth concentrate powder is improved, the reaction rate is improved, and better experiment result can be completed at lower investment in very short time, so as to reach the unforeseen experiment purpose. Moreover, the complicated preparation process of rare earth metals by the metallothermic method is avoided, and the coke which is increasingly lacked and used in the rare earth oxides agglomeration reducing method is saved.

A primary school science buoyancy measurement experiment device disclosed by the present invention comprises a support, the left end of the top of the support is provided with an air cylinder, the inner cavity of the air cylinder is connected with a bracket through a piston, the bottom of the right side of the air cylinder is communicated with an air bag through a pipeline, and the top of the air bag is provided with a buoyancy block. A demonstration box is arranged at the right end of the top of the support, and a first supporting plate is arranged on the top of the support and located on the right side of the demonstration box. The air cylinder, the piston, the support and the air bag are arranged, air in the air cylinder can be conveyed into the air bag through a pipeline, the air bag can adjust the buoyancy of the buoyancy block in water, the requirement for buoyancy and air volume measurement experiments of people is met, meanwhile, people can pour liquid with different concentrations into the demonstration box or put solid with a small volume into water, and the demonstration box is convenient to use. Therefore, the purpose of experimenting the buoyancy of the buoyancy block in liquids with different concentrations by people is achieved, and great convenience is brought to the use of people.

The invention discloses a special acupuncture and auxiliary device for small animal unilateral acupoint selection research, which comprises a base and an acupuncture needle, two rod sleeves are arranged on a support rod mounted at the upper end of the base, and a first ball, a first ball sleeve, a second connecting rod, a rod sleeve, a second ball, a second ball sleeve and a third connecting rod are continuously mounted at the front end of the rod sleeve positioned at the lower end; the front end of the third connecting rod is provided with the upper end of a vertically-arranged sliding seat, the front surface of the sliding seat is slidably connected with a sliding plate, the lower end of the sliding plate is provided with a fourth connecting rod, the front end of the fourth connecting rod is provided with an acupuncture positioning sleeve, and the acupuncture positioning sleeve is in threaded connection with a sixth fixing bolt; compared with the prior art, the device has the advantages that after an acupuncture needle is fixed in the acupuncture positioning sleeve, the angle of the acupuncture needle can be adjusted in multiple directions by rotating the first ball sleeve and the second ball sleeve, the acupuncture position can be found, and the acupuncture needle in the acupuncture positioning sleeve is driven to stably prick into the body of a mouse on an experiment table by sliding the sliding plate downwards to complete an experiment.