110 results about "Oxyhydrogen" patented technology

The utility model discloses an oxyhydrogen flame welding and cutting device, which relates to the field of oxyhydrogen flame welding and cutting, and comprises a shell, an oxygen compression bottle and a hydrogen compression bottle are respectively arranged at the lower part in the shell, a partition plate is arranged in the shell, and a conveying pipe is arranged at the bottom of the partition plate. By arranging the dismounting assembly, when the oxygen compression bottle or the hydrogen compression bottle needs to be replaced, the threaded rod can be rotated to move upwards and drive the movable ring to move upwards, the movable ring drives the movable barrel to move upwards, and after the movable barrel is moved out of the air outlet pipe, a worker can take the oxygen compression bottle or the hydrogen compression bottle out of the shell; a new oxygen compression bottle and a new hydrogen compression bottle are placed in the shell, then the threaded rod is rotated in the reverse direction, the movable ring moves downwards, the movable barrel is inserted into the gas outlet pipe, and therefore the oxygen pipe or the hydrogen pipe can be connected with the gas outlet pipe, and the oxygen compression bottle or the hydrogen compression bottle can be rapidly disassembled and assembled in the mode.

A zero-carbon flash reduction ironmaking device comprises a reaction tower, the reaction tower is arranged upside down, a flash reduction area, an iron powder waste heat boiler and a green oxygen preheater are sequentially arranged in an inner cavity of the tower from top to bottom, oxyhydrogen powder entering the tower is subjected to oxyhydrogen combustion, mineral powder green hydrogen absorbs heat and is heated to the high temperature, and all hydrogen reduction reaction is completed before the mineral powder flows out of the flash reduction area. Iron powder is cooled through an iron powder waste heat boiler and a green oxygen preheater, hydrogen steam is cooled through a hydrogen steam waste heat boiler and a mineral powder preheater, and hydrogen water is separated through a cyclone dehydrator and a drying filter. The iron ore concentrate powder with the particle size smaller than 200 meshes falls into a powder bin, the reduction temperature ranges from 1100 DEG C to 1200 DEG C, the time for the ore powder to flow through a flash reduction area ranges from 2 s to 3 s, and the temperature for the ore powder to leave an iron powder waste heat boiler and the temperature for hydrogen steam to leave a hydrogen steam waste heat boiler range from 125 DEG C to 175 DEG C. The invention can be used for flash smelting of iron ore concentrate powder. The invention has the advantages of high waste heat recovery rate, long service life of the furnace lining, low energy consumption and zero carbon emission, and can avoid using the key management object coke ironmaking blast furnace device of the national two-high project.

The invention provides a preparation method and device of an optical fiber preform, the preform and an optical fiber. The device comprises a quartz accessory, a first heating furnace, a second heating furnace and a clamp, the first heating furnace can move relative to the quartz accessory so as to heat a sleeve of the quartz accessory, and the clamps are arranged at the upper end and the lower end of the quartz accessory; the quartz accessory comprises a core rod, a core rod tail handle connected with the core rod, a sleeve formed by a quartz tube containing a negative dopant and the core rod, and a sleeve tail handle connected with the sleeve; a medicament chamber is arranged in the core rod tail handle; an air outlet hole is formed in the medicament chamber; the second heating furnace is used for heating the medicament chamber. By means of the device, the doping and melting shrinkage process of alkali metal can be achieved at a time, the preparation efficiency is improved, an oxyhydrogen flame heating process is replaced with a melting process, and the core rod utilization rate is increased.

The invention provides a gas turbine power generation and propulsion integrated system based on hydrogen and oxygen preparation and combustion, and belongs to the technical field of power supply devices. The device comprises an oxyhydrogen storage part, a fuel gas generator, a turbine part and a motor part which are connected in sequence, hydrogen and oxygen fuel stored in the hydrogen and oxygen storage part is supplied to the fuel gas generator for combustion, generated gas is conveyed to the turbine part to push turbine blades in the turbine part to rotate to generate mechanical energy, the turbine blades rotate to drive a motor rotor of the motor part to rotate, the mechanical energy is converted into electric energy through electromagnetic induction, and power generation is achieved. According to the invention, a turbine power generation system formed by the hydrogen and oxygen storage part, the gas generator, the turbine part and the motor part is used for generating power, and the generated power is used for supplying power to satellite airborne equipment, so that the power can be efficiently generated at high speed and high power, and the power can be efficiently and quickly supplied to satellite airborne high-power electric equipment when a target needs to be attacked.

The utility model discloses a dry-type anti-backfire device for hydrogen-oxygen mixed gas, which relates to the technical field of anti-backfire devices and comprises a shell, a cover body is in threaded connection with the inside of the shell, a fire stopping sheet is placed in the shell, a first sealing ring matched with the fire stopping sheet for use is placed in the shell, and a second sealing ring matched with the fire stopping sheet for use is placed in the shell. The surface of the shell communicates with a sleeve, and the interior of the sleeve is slidably connected with a piston rod. According to the anti-backfire device, the fire stopping sheet is mounted in the shell, so that after the anti-backfire device is mounted at one end, far away from an external pipeline, of a pipeline in equipment through the air inlet connector and the pipeline in the equipment is subjected to backfire, flames can be effectively blocked after passing through the fire stopping sheet, and the flames are prevented from entering the hydrogen-oxygen generator; the anti-backfire device can effectively protect the interior of equipment, and the whole anti-backfire device is simple in structure and small in size, can be installed in the equipment for the last fire prevention work of the equipment, and improves the practicability.

The invention relates to the technical field of automobile maintenance, and discloses a hydrogen-energy environmentally friendly carbon removal device. The device comprises a liquid storage tank and an electrolytic tank connected by a liquid inlet pipe, the electrolytic tank being connected to the liquid storage tank by a liquid-gas mixing pipe, the top of the liquid storage tank being connected to a dehydration component by a first gas outlet pipe, and an air pump and a gas outlet passage. The air pump is connected to the dehydration component by the gas inlet pipe; the gas outlet passage transports the hydrogen-oxygen mixed gas from which water has been removed into an automobile engine; the hydrogen-energy environmentally friendly carbon removal device is provided with an air pump. Before the hydrogen-oxygen mixed gas from which water has been removed is introduced into the automobile engine for carbon removal treatment, the air pump transports air into the dehydration component. The air that has undergone water absorption treatment is mixed with the hydrogen-oxygen mixed gas and then transported into the automobile engine. By increasing the oxygen content, the amount of hydrogen in the mixed gas is reduced, thereby avoiding the situation where energy release is restricted during hydrogen combustion due to insufficient oxygen, thereby affecting the cleaning effect of carbon deposits in the engine.

The invention provides a multi-degree-of-freedom cooperative control-based quartz tube and tube cap oxyhydrogen flame automatic seal welding method. The method comprises the following steps of S1, vacuum preparation: fixing a quartz tube loaded with indium phosphide polycrystal materials and a tube cap on a positioning platform for vacuumizing; the three-dimensional coordinates of the quartz tube and the tube cap are obtained through laser scanning, a seven-axis mechanical arm path is generated, and the fitting error is smaller than or equal to 0.05 mm; s3, a preheating stage; s4, a heat sealing stage, wherein the temperature is kept constant after temperature rise, and the circumferential speed of a mechanical arm is 0.8-1.2 rad / s; s5, a slow cooling stage, wherein the temperature is reduced to 700 DEG C, and the moving speed is 8-12 mm / s; and S6, airtightness detection: the standard is less than or equal to 5 * 10 Pa.m / s. The problem of quartz tube and tube cap curved surface welding is solved through four-degree-of-freedom dynamic compensation, thermal field stable control is achieved through gradient gas distribution, the vacuum sealing quality is guaranteed through time sequence interlocking, and the operation reliability is guaranteed through a millisecond-level safety mechanism.

The utility model relates to the technical field of hydrogen-oxygen separation devices, in particular to a hydrogen-oxygen separator washing device which comprises a separator, a partition plate, a connecting cover and a water passing pipe, a communicating pipe is installed on one side of the outer wall of the upper end of the separator in an inserted mode, and a shell is installed on the outer wall of the upper end of the communicating pipe. Partition plates which are distributed in parallel at equal intervals are installed on the inner wall of the shell, first bearings are embedded in the partition plates, a water passing pipe is rotatably installed in the first bearings, a driving shaft is rotatably installed on one side of the upper end of the inner wall of the shell, and a connecting cover is arranged on the outer side of the water passing pipe; an exhaust pipe is inserted into the upper end of the outer wall of one side of the shell, so that the dispersion uniformity of washing liquid in the filler layer is ensured, the absorption effect of the filler layer on alkali mist in gas can be ensured, meanwhile, the use amount of water spraying pipes is reduced, the shielding of a gas flowing path is reduced, and the circulation efficiency of the gas in the shell is improved; and the gas washing efficiency is improved.

To provide a quartz nozzle that can be used for supplying raw material gases and other purposes in a semiconductor deposition device and a method of manufacturing the same.SOLUTION: In a semiconductor deposition device, a quartz nozzle that is fused to the tip of a gas pipe for supplying a raw material gas and used is formed from synthetic quartz. The quartz nozzle 10 includes: a circular nozzle surface 11 with multiple discharge holes 12 formed for discharging the raw material gas; and a skirt portion 13 consisting of a side wall that is upright relative to the nozzle surface 11 on the periphery of the nozzle surface. The inner diameter D1 of the skirt portion 13 is the same as the inner diameter of the gas pipe to which the quartz nozzle 10 is mounted. The end face of the gas pipe made of quartz and the end face of the skirt portion of the quartz nozzle 10 are heated with an oxyhydrogen burner or the like, slightly melted and fused together. By providing the skirt portion in this way, the influence of heating during fusion on the nozzle surface 11 can be suppressed, thereby suppressing influence such as deformation or clogging of the discharge holes 12 due to heating.SELECTED DRAWING: Figure 1

The invention relates to a direct-current pulverized coal burner, in particular to a direct-current pulverized coal burner for a solar coupling SOEC system. The problems that in the prior art, a coal power unit only depends on pulverized coal combustion, the stable combustion effect is poor under the rated load of 20%-30% or below, and combustion is unstable are solved. The catalytic combustion effect is achieved in the combustion process of mixing hydrogen, oxygen and pulverized coal airflow, the hydrogen, the oxygen and the pulverized coal airflow serve as stable ignition heat sources, combustion is rapid, a large amount of heat is released, combustion of the hydrogen and the oxygen activates the temperature, pulverized coal volatile matter is promoted to be separated out, pulverized coal is ignited, combustion is more stable, and combustion efficiency is improved. The stable combustion load and the unburned loss of the combustor can be greatly reduced only by adding a small amount of oxyhydrogen, the temperature level at the initial stage of pulverized coal combustion is improved, long-time low-load efficient stable combustion of the combustor can be achieved, stable combustion of a coal power unit under the rated load of 20%-30% is achieved, and the minimum stable combustion load can be reduced to 15%. The invention belongs to the technical field of combustors.

The invention discloses aluminum-doped opaque quartz glass and a manufacturing method thereof. The manufacturing method comprises the following steps: S1, selecting high-purity quartz sand as a base material; s2, adding an aluminum-containing compound and a pore-forming agent into the high-purity quartz sand selected in the step S1, and fully and uniformly mixing to obtain a mixture; s3, putting the mixture mixed in the step S2 into a mold for shaping; s4, calcining the shaped mixture by adopting oxyhydrogen flame; and S5, naturally cooling after calcining is completed, and demolding to obtain the milky-white opaque quartz glass, so that the milky-white opaque quartz glass has high whiteness and low thermal conductivity, and has high-temperature deformation resistance superior to that of traditional milky-white quartz glass.

The invention discloses a method and a process for repairing a high-purity quartz crucible, and relates to the field of high-purity quartz material processing. The method comprises the steps of box opening inspection and repairability judgment, cleaning treatment, defect grading judgment, defect removal, oxyhydrogen flame welding repair, dehydroxylation treatment, secondary cleaning and drying, quality detection and qualified product packaging. Reparability judgment has a clear standard, a grinding head with a specific particle size and a polishing solution are used for defect removal, a high-purity material with a matched thermal expansion coefficient is adopted for welding, dehydroxylation is carried out in two stages, and quality detection covers air tightness, roughness and impurity content. The method solves the problems of resource waste, poor repairing quality and the like in the prior art, can effectively recover the performance of the crucible and improve the qualification rate, and is suitable for repairing semiconductors and photovoltaic crucibles.

A method for operating a piston engine is disclosed, in which a water dispersion containing a reactant is supplied to the combustion chamber of the piston engine, wherein a heating element is placed in the combustion chamber. A first explosion is triggered by the explosive vaporization of the water contained in the water dispersion, by bringing the water dispersion into contact with the heating element and thereby heating it above its boiling point. A second explosion is triggered simultaneously with or immediately after the first explosion, by heating the vaporized water at the heating element with the reactant to a process temperature, thus causing a first chemical reaction in which gaseous hydrogen is produced. This hydrogen combines with process oxygen present in the combustion chamber, under the influence of the process temperature maintained in the combustion chamber by the heating element, in an oxyhydrogen reaction to form water.The expansive reaction energy generated by the first and second explosions is converted into mechanical kinetic energy by the movement of the piston.

A breathing system of a concentration-adjustable oxyhydrogen generator is used for changing the concentration of gas breathed by an assisted person and comprises an oxyhydrogen supply assist device (13), pure water electrolysis oxyhydrogen manufacturing machines (1 and 1 '), a moist bottle (3) and a hydrogen concentration detector (14). Wherein the pure water electrolysis oxyhydrogen manufacturing machine (1, 1 ') comprises ion exchange membranes (10, 10'), and the two sides of the ion exchange membranes (10, 10 ') are coated with oxidation catalyst layers (100, 100') and reduction catalyst layers (102, 102 ') respectively; a pair of anode metal layers (110, 110 ') and cathode metal layers (112, 112') having pores (114); anodes (120, 120 ') conductively connected to the anode metal layers (110, 110') and cathodes (122, 122 ') conductively connected to the cathode metal layers (112, 112'); the sealed containing body (2, 2 ') of the structure is used for containing the pure water electrolysis hydrogen and oxygen manufacturing machine (1, 1'), and the sealed containing body (2, 2 ') is provided with a water injection hole (20), a hydrogen hole (22, 22') and an oxygen hole (24, 24 '). The moist bottle (3) comprises an oxygen transmission pipe (32), a hydrogen transmission pipe (30), a mixed moist output pipe (34) and a bottle body (36); the mixed moist output pipe (34) is connected to the hydrogen and oxygen supply assistor (13); and one end of the oxygen transmission pipe (32) and one end of the hydrogen transmission pipe (30) are respectively inserted into clean water.

The invention relates to a welding device and a control method thereof.The welding device comprises a furnace body, a heating assembly and a clamping assembly, and the furnace body is provided with a heating cavity; the heating assembly comprises a graphite piece and an electromagnetic coil which are arranged in the heating cavity, and the electromagnetic coil is wound around the periphery of the graphite piece and used for being electromagnetically coupled with the graphite piece so that the graphite piece can emit heat; the clamping assembly comprises two clamping pieces which are oppositely arranged in the first direction, the clamping pieces at least can move in the first direction, and the clamping pieces are used for at least fixing the welding end of the quartz piece in the heating cavity. According to the technical scheme, pollution can be reduced, and the pollution problem caused by direct contact of flames in traditional oxyhydrogen flame welding is solved.

The application discloses a preparation method of an iron-based honeycomb filled circular pipe thin-wall structure reinforced aluminum-based composite material, and belongs to the technical field of metal composite material preparation.The method comprises the following steps: calculating the required mass of metal ingot according to the volume of the filled pore and the density of the aluminum-based solid material; stacking the iron-based honeycomb filled circular pipe thin-wall structure and aluminum ingot into a corundum ceramic boat, with the aluminum ingot above the thin-wall structure; placing the corundum ceramic boat in a high-temperature resistant glass tube; using a vacuum pump to vacuumize the two; then using oxyhydrogen welding to seal the tube; placing the glass tube in a sintering furnace to perform sintering; after sintering is completed, cooling the furnace to room temperature, then taking out the sample, and the iron-based honeycomb filled circular pipe thin-wall structure reinforced aluminum-based composite material is obtained.The method avoids the generation of an oxide layer between the Al / Fe alloy, the obtained composite material interface is complete fusion without obvious boundary, the method is simple and efficient, the excess aluminum-based material can be recycled, and the energy consumption and cost are low.

The invention discloses a batch infrared heating pipe vacuum treatment device and technology, and relates to the technical field of infrared heating pipe vacuum treatment.The batch infrared heating pipe vacuum treatment device comprises a placing frame and a pneumatic conveying mechanism, and the pneumatic conveying mechanism is installed on the side of the placing frame and comprises a conduction assembly installed on the side of the placing frame; the conduction assembly is composed of a vacuum pump, a high-pressure steel cylinder, a gas pipeline and a valve. By designing a multi-station synchronous processing system, batch clamping and continuous processing of the quartz tubes are achieved, a unique gas path switching mechanism is adopted, through a sliding guide mechanism and a specially-designed gourd block structure, efficient switching between the vacuumizing function and the inflation function is achieved, an efficient sealing technology is developed, and the sealing effect is improved. By combining an oxyhydrogen flame torch sealing technology, the sealing reliability and consistency of the quartz tube are ensured.

The invention belongs to the technical field of new energy hydrogen production, and particularly relates to an inland river multifunctional ship economic dispatching strategy considering electric hydrogen and oxygen port crossing trade. Comprising the steps that a day-ahead scheduling model is constructed, and the day-ahead scheduling model comprises a target function, a multifunctional ship space transfer constraint and a multifunctional ship energy constraint; wherein the target function takes the minimum daily comprehensive operation cost of the multifunctional ship as a target, and the operation of the hybrid power ship is optimized; the multifunctional ship space transfer constraint comprises the steps that a multifunctional ship can be transferred among different ports; the multifunctional ship energy constraint comprises the steps that the multifunctional ship is provided with a storage battery and can be flexibly charged and discharged, the multifunctional ship can carry out hydrogen adding or hydrogen selling at a port and can generate electricity through hydrogen energy, and the multifunctional ship can carry out oxygen adding or oxygen selling at the port. According to the invention, the maximization of the operation economy of the electric oxyhydrogen port crossing trade is realized through the multifunctional inland river ship, and the comprehensive utilization rate of energy resources is improved.

The utility model discloses a water-gas separation device of an oxyhydrogen generator, and relates to the technical field of oxyhydrogen preparation, the water-gas separation device comprises a device main body and an end plate, a surge bin is fixed in the device main body, and a shunting hole is formed in one side of the surge bin; a guide cylinder is fixed to the top of the buffering bin, a resistance reducing sleeve is connected into the guide cylinder, a balancing weight is arranged in the resistance reducing sleeve, the balancing weight is wrapped with a buffering sleeve, and limiting columns are fixed to the two sides of the bottom of the end plate. Through the arrangement of the surge bin and the flow dividing holes, when high-pressure hydrogen flow or oxygen flow enters the annular groove, the flow path is dispersed through the multiple flow dividing holes, flow concentration of a single channel is reduced, and therefore the local pressure peak value is reduced; part of kinetic energy is converted into heat energy, and pressure energy is effectively consumed; compared with a traditional buffer tank, the buffer tank is simple in structure and low in cost, and is an economical and effective buffer scheme.

The application belongs to the technical field of hydrogen-oxygen atomizing device, and relates to a gas generating device with adjustable hydrogen-oxygen ratio, which comprises a hydrogen-oxygen generating device, an oxygen generating device and a control device, the hydrogen-oxygen generating device is used for generating hydrogen and oxygen with a ratio of 2:1, the oxygen generating device is used for generating oxygen with a concentration of 93%+ / -3%, and the control device is used for controlling the flow generated by the hydrogen-oxygen generating device and the flow of the oxygen generating device, so as to adjust the hydrogen-oxygen ratio of the output. The application controls the flow of each device through a control system, widens the ratio mode of hydrogen-oxygen mixed gas, meets the oxygen flow demand on the basis of meeting the hydrogen flow demand, reduces the manufacturing difficulty in the application occasion requiring large oxygen flow, saves energy, widens the application scene of hydrogen-oxygen mixed gas, and provides a more comprehensive gas supply mode for treating respiratory diseases by using hydrogen.

The utility model discloses an anti-backfire wet-type safety device for large-capacity oxyhydrogen, which relates to the technical field of anti-backfire devices, and comprises a mounting rack, water storage tanks are symmetrically mounted in the mounting rack, the top of each water storage tank is communicated with a neck tube, a lower seal head is welded on the surface of each neck tube, and the lower seal head is connected with a water storage tank. An upper sealing head is welded to the top of the lower sealing head, and two water sealing discs are fixedly connected to the interior of the neck pipe; the two water sealing discs are installed in the neck pipe, the condensing coil is installed between the two water sealing discs, and when external cooling water circulates in the cavity formed between the two water sealing discs through the circulating water passing pipe, gas conveyed in the condensing coil can be condensed, so that the gas forms water drops and is guided into the water storage tank; and in cooperation with further condensation of the gas distribution plate, moisture in gas is separated out to the maximum extent, and the subsequent liquid spraying condition is prevented.

The present invention discloses an apparatus and method for generating hydrogen and oxygen mixed gas with adjustable hydrogen content, the apparatus includes an oxygen generating device for separating and storing oxygen from the air, a hydrogen generating device for generating hydrogen or a mixed gas of hydrogen and oxygen by electrolysis of water, a control module for controlling and adjusting the flow rate of oxygen, detecting the concentration of oxygen, and adjusting the flow rate and hydrogen content of the mixed gas of hydrogen and oxygen within a predetermined range, and a case for storing the oxygen generating device, the hydrogen generating device, the control module, and a power supply module for supplying power to each of the above devices. The oxygen generated by the oxygen generating device and the hydrogen or mixed gas of hydrogen and oxygen generated by the hydrogen generating device are merged into the outlet of the hydrogen and oxygen mixed gas generating device through a pipeline, and are discharged after being humidified or directly. The present invention also discloses a method for using the apparatus. The present invention has advantages such as a long life, adjustable hydrogen content, and adjustable flow rate of the mixed gas of hydrogen and oxygen.

The invention discloses low-hydroxyl defect-free quartz glass and a preparation method thereof.The preparation method comprises the steps that silicon tetrachloride is subjected to flame hydrolysis in oxyhydrogen flame, and a porous silicon dioxide base material is obtained; carrying out vacuum dehydration heat treatment on the porous silicon dioxide base material, heating to 1400-1500 DEG C, carrying out transparent vitrification treatment, and then carrying out thermal forming and annealing treatment to obtain a quartz glass body; and carrying out heat treatment on the obtained quartz glass body in a hydrogen-containing atmosphere at the air pressure of 0.1-1.0 Mpa and the temperature of 520-680 DEG C for 150-500 hours to obtain the low-hydroxyl defect-free quartz glass. Aiming at the problem of oxygen deficiency of quartz glass prepared by a soot method, the invention develops a hydrogen-loaded heat treatment method, so that the oxygen deficiency of the quartz glass is eliminated, and the hydroxyl content is less than 20 ppm.

An integrated system for power generation and method thereof is disclosed, for generating and utilizing hydrogen gas or oxyhydrogen gas for enhancing fuel efficiency, thereby providing energy efficient power generation. An electricity generation system (402) generates and store an electric current in a battery for processing a gas generator (100) i.e., hydrogen (H2) or oxyhydrogen (HHO) gas generator. In the gas generator (100) an Automatic Transmit Power Control power supply (102) stabilizes power transmission, providing constant current by a current source (104) to an electrolysis setup (106) for generating hydrogen (H2) gas or oxyhydrogen (HHO) gas. A thermostat regulates temperature, and a demister separates steam from the generated gas. A burner (200) combusts the generated gas. A steam boiler (302) converts water into high pressure steam using the generated gas. A steam turbine (304) converts the high-pressure steam into mechanical energy. An electricity generator (306) converts mechanical energy into electrical energy.

The utility model discloses a water-sealed tank for preparing gas by an oxyhydrogen machine, which comprises a water-sealed tank body, a tempering pipe is led out from one side of the upper end of the water-sealed tank body, an expansion part with a spherical structure is arranged at the position, close to the bottom end, of the tempering pipe, a support with a cross-shaped structure is mounted in the expansion part, and the support is connected with the water-sealed tank body. A telescopic column is fixed to the middle of the upper end of the support and sleeved with a spring, a buffer plate is fixed to the movable end of the telescopic column, and a plurality of through holes are formed in the surface of the buffer plate. The water seal device has the advantages that by arranging the telescopic column, the spring, the buffer plate and the expansion plate, impact force of flames acts on the telescopic column through the buffer plate in the water seal process, then the telescopic column and the spring are compressed to drive the buffer plate to move downwards to be located in the expansion part, meanwhile, the impact force is absorbed, the impact force on liquid is reduced, and the water seal effect is improved. The water sealing effect of the device is ensured.

The utility model discloses a glass tube melting sealing device for oxyhydrogen flame, which belongs to the technical field of glass tube melting sealing and comprises a rack, a transverse moving mechanism arranged on the rack, a rotary melting sealing mechanism arranged on the transverse moving mechanism, a limiting mechanism arranged on one side of the upper portion of the rack, and a bearing mechanism arranged on one side, far away from the limiting mechanism, of the rack. The glass tube can be uniformly heated in a rotating state, so that 360-degree dead-corner-free heat sealing is realized, after the glass is heated to a proper temperature, the glass is locally melted and closed, the heat sealing process is finished, the heat sealing heating precision and uniformity are improved, the phenomena of deformation, bubbles or cracks of the heat sealing surface of the glass tube are avoided, the operation is simpler and more convenient, and the process is more controllable.

The invention discloses a tin telluride-based thermoelectric material with low lattice thermal conductivity and a preparation method thereof, the tin telluride-based thermoelectric material with low lattice thermal conductivity has a chemical formula of Sn < 0.88 > Sb < 0.04 > Mn < 0.08 > Ge < 0.05 > Te-x% Cu < 2 > Te, and x < = 7. The preparation method comprises the following steps: weighing raw materials Sn, Te, Sb, Mn, Ge and Cu according to stoichiometry; the raw materials are transferred into a quartz tube after being mixed, vacuumized and sealed by oxyhydrogen flame; heating a quartz tube filled with the mixture, carrying out a melting reaction, and quenching in water after the reaction is finished to obtain a SnTe cast ingot; the SnTe cast ingot is ground into powder, the powder is put into a mold to be sintered, and the tin telluride-based thermoelectric material with the low lattice thermal conductivity is obtained. Non-toxic raw materials are adopted, the environmental protection property of the tin telluride-based thermoelectric material is guaranteed, meanwhile, a nano core-shell structure is formed in tin telluride through multi-element regulation and control doping and a proper process, and phonon scattering is greatly enhanced.

The utility model discloses a gas transmission butt joint assembly and an oxyhydrogen machine. The gas transmission butt joint assembly comprises a first mounting seat, a second mounting seat and a gas guide structure, and the first mounting seat is provided with a first cavity; the second mounting seat is arranged on the first mounting seat in a sliding manner and has a first working state and a second working state; in the second working state, the air guide structure can be exposed from the first mounting seat; when the second mounting base is in the second working state and bears the acting force in the first direction, the second mounting base can be switched from the second working state to the first working state, when the external force borne by the second mounting base is removed, the second mounting base can be kept in the first working state, and when the second mounting base bears the acting force in the first direction again, the second mounting base can be kept in the second working state. The second mounting base can be switched from the first working state to the second working state. According to the utility model, the gas output operation of the oxyhydrogen machine is more convenient, the structure is more compact, and the occupied space is smaller.

The utility model provides a sandwich type hydrogen-oxygen fuel cell experiment teaching device, and relates to the technical field of experiment teaching equipment, a discharge reaction group is fixed between a positive electrode flow channel group and a negative electrode flow channel group, and the positive electrode flow channel group, the negative electrode flow channel group and the discharge reaction group are fixed through insulating bolts; according to the positive electrode runner set, a first cover plate is arranged on one side of a positive electrode runner plate, a snakelike airflow runner is arranged in the middle of the positive electrode runner plate, an air inlet cavity is formed in one end of the snakelike airflow runner of the positive electrode runner plate, an exhaust cavity is formed in the other end of the snakelike airflow runner of the positive electrode runner plate, a positive conductive column is installed on the positive electrode runner plate, an oxygen guide column is installed on the first cover plate, and a first exhaust hole is formed in the first cover plate. The first cover plate is provided with a positive conductive column through hole. And the discharge reaction group is formed by installing a proton exchange membrane between a positive electrode aluminum foil and a negative electrode aluminum foil. According to the utility model, the snake-shaped air flow channels are arranged on the electrode plates, so that the reaction of hydrogen and oxygen is facilitated, and a good catalytic effect is achieved; and due to the design of the plane structure, the H2 adsorption efficiency of the electrode is improved.