1429 results about "Glass tube" patented technology

The utility model discloses a soil moisture tensiometer, which belongs to the technical field of soil moisture tensiometers, and comprises a glass tube, a fixing component is arranged on the peripheral side of the bottom of the glass tube, a plug is arranged at the top end of a pressure monitoring device, a mounting sleeve is arranged below the plug, and the mounting sleeve is fixedly connected to the outer side of the top of the glass tube. A water supplementing and exhausting assembly is arranged on one side of the mounting sleeve. According to the water purifier, a worker manually presses a circular plate to drive a fixing rod and a piston to move, purified water stored in a fixing barrel is conveyed into a connecting block, and when the pressure of the connecting block is larger than the elastic force of a spring, water flow of the connecting block can drive a ball head block, a side block and a tooth block to move; at the moment, the liquid is conveyed into the glass tube through the stepped through hole and the one-way water inlet so as to perform water replenishing treatment on the interior of the glass tube, so that the mounting and dismounting work of the plug is reduced, the influence on the sealing performance of the plug after a long time is prevented, and the influence on the monitoring precision of a product is further prevented.

The invention provides a preparation method of a MoTe2 single crystal. The preparation method comprises the following steps: A, weighing molybdenum powder, tellurium powder and cobalt powder according to a stoichiometric ratio; b, the powder weighed in the step A is poured into a glass beaker, convective mixing is achieved under the action of a stirrer, and the duration time is 20-30 minutes; c, pouring the powder ground in the step B into a crucible, and sealing; d, putting the crucible in the step C into a glass tube; e, covering the glass tube in the step D with a glass cap; f, vacuumizing the glass tube by using a vacuum pump set, then filling argon, repeating the gas washing process for three times, and then vacuumizing again; g, aligning the middle position of the glass cap, heating to melt the tube wall of the glass tube and the glass cap together, and completing vacuum sealing; and H, putting the glass tube in the step G into a box-type furnace, sintering, taking out, putting into a water bucket, and quenching to obtain a single crystal sample.

The utility model discloses a polishing device and polishing equipment, the polishing device comprises a main frame body, an outer circumference polishing part and an inner circumference polishing part, the main frame body can move along a first direction; the peripheral polishing part is connected to the main frame body; the inner circumference polishing part is connected to the main frame body; wherein a polishing cavity is formed between the outer peripheral polishing part and the inner peripheral polishing part, the polishing cavity is used for polishing a tubular body, the outer peripheral polishing part is used for polishing the outer peripheral surface of the tubular body, and the inner peripheral polishing part is used for polishing the inner peripheral surface of the tubular body. The polishing device can improve the polishing efficiency of the glass tube and is applied to the field of glass tube polishing.

The invention relates to the technical field of medicinal packaging container manufacturing, and discloses a processing technology of a double-cavity cartridge bottle, which comprises the following steps: glass tube loading: selecting a glass tube as a raw material, loading the glass tube into a clamping mechanism of forming equipment, fixing the glass tube through a positioning assembly, enabling the axis of the glass tube to coincide with a processing datum line of the equipment, and forming the glass tube; according to the processing technology of the double-cavity cartridge bottle, double-cavity integrated forming is adopted, the strength and the sealing performance of a separation structure of the main body cavity and the bypass cavity are effectively improved, the sealing hidden danger of split splicing is avoided, the leakage and fracture risks are greatly reduced, the technology is matched with the two forming means that a guide pipe is inserted into blow molding and matched with a mold, and medicinal glass raw materials are compatible; the double-cavity cartridge bottle meets the requirements of medical storage for stability and adaptability, meets the storage requirements of various drugs, reduces drug adsorption and chemical reactions, broadens clinical application scenes, and remarkably improves the practical value of the double-cavity cartridge bottle.

The invention belongs to the technical field of high-temperature flow field velocity testing, and discloses a PIV (particle image velocimetry) endoscopic protection device for measuring a high-temperature airflow velocity field, which is suitable for measuring three-dimensional velocity field distribution in a turbine channel, between stages and at an inlet and an outlet of a turbine in a high-temperature and high-speed airflow environment. The device is characterized by comprising a shell, an inner wall, a sapphire glass tube, a partition plate, a light guide window, a water inlet channel, a water outlet channel, an optical element, a mounting seat and a cavity. The shell, the inner wall and the sapphire glass tube are coaxially sleeved and respectively form two-stage interlayers; the space between the shell and the inner wall is divided into an n-shaped water inlet channel and an n-shaped water outlet channel through a partition plate, circulating flowing of cooling water is achieved, and an endoscope optical assembly and a sapphire glass tube are efficiently cooled. Light guide windows are formed in the side wall of the shell from top to bottom in an equal-diameter and equal-interval mode, and an optical element capable of moving up and down in the glass tube in the axial direction is combined, so that the narrow measurement section in the turbine can be accurately measured; according to the structure, the temperature near the sapphire glass tube can be controlled below 500K under the extreme condition that the external environment temperature is up to 2000K, high temperature is effectively isolated, thermal stress concentration is relieved, and stable signal transmission and imaging measurement are ensured. Compared with the prior art, the endoscope probe can accurately reach a measurement area which is difficult to cover by a traditional light source, and efficient and stable measurement of a high-temperature, complex and narrow space flow field is achieved.

The invention provides a sulfonated modified COF-based hydrogel based on a TPAD skeleton, and a preparation method and application thereof, and belongs to the field of water treatment. The preparation method comprises the following steps: S1, synthesizing a TPAD-NHBoc amino monomer by using reagents such as 1, 4, 5, 8-tetrachloroanthraquinone and the like; s2, sequentially adding a TPAD-NHBoc amino monomer, a Dha aldehyde monomer, dioxane and trifluoroacetic acid into a glass tube according to a certain proportion, carrying out ultrasonic treatment, stirring, putting into a reaction kettle, and reacting at 115-125 DEG C for 96-120 hours; s3, after the reaction is finished and cooling is performed, carefully taking out the blocky gel from the glass tube, respectively immersing the blocky gel into dioxane and DMF, and repeatedly replacing the solvent for washing; s4, washing the gel, soaking the washed gel in a DMF solution containing 1, 3-propane sultone, and carrying out a reaction at 75-85 DEG C for 16-20 h to obtain sulfonated modified gel; s5, the obtained sulfonated modified COF-based gel is soaked in DMF, acetone, methanol and water for multiple times of soaking and washing, and the hydrogel is obtained. The sulfonated modified hydrogel based on the TPAD skeleton has excellent solar photo-thermal water evaporation performance.

The invention discloses a dual-mode micro-droplet generation micro-fluidic chip and application thereof in generation of dual-emulsion droplets, and relates to the technical field of micro-fluidic chips. The method comprises the following steps: respectively injecting two different internal phase solutions from the left ends of respective iron tubes, guiding the internal phase solutions to a wedge-shaped tube orifice of a theta-shaped glass capillary tube through respective thin tubes, injecting an intermediate phase solution into a square glass tube through an intermediate phase inlet by using a No.1 needle, and injecting an external phase solution into the square glass tube through an external phase inlet by using a No.2 needle; the two internal phase solutions, the intermediate phase solution and the external phase solution converge at an inlet of the circular glass capillary tube, and after entering the circular glass capillary tube, water-in-oil-in-water double-emulsion droplets are obtained. The invention can obtain the dual-mode micro-droplet generation micro-fluidic chip and the application of the dual-mode micro-droplet generation micro-fluidic chip in generation of dual-emulsion droplets.

The invention discloses a hollow-core optical fiber microstructure size dynamic nondestructive measurement and control system, which is characterized in that a spectral confocal detection module acquires spectral signals reflected by each interface of the cross section of a hollow-core optical fiber from the side surface of the hollow-core optical fiber by using a dispersion confocal principle in a hollow-core optical fiber drawing process, and converts the spectral signals into spectral data; the data analysis module outputs an axial peak value calculated value by using a neural network model according to the spectral data, and converts the axial peak value calculated value into the diameter of a nested glass tube in the nested structure unit; the regulation and control module outputs an airflow regulation instruction according to the difference between the diameter of the nested glass tube and a preset value; the airflow control module adjusts the size of airflow entering the hollow-core optical fiber according to the airflow adjusting instruction, and then the diameter of the nested glass tube is adjusted. According to the invention, the diameter of the nested structure unit in the hollow-core optical fiber can be accurately measured in the production process, and the technological parameters can be adjusted in time according to the product state.

The invention provides a medicinal glass tube appearance defect detection method and device, and belongs to the technical field of pharmaceutical equipment and quality detection.The method comprises the steps that a to-be-detected target image is obtained, and the to-be-detected target image is a medicine package glass tube image; target detection processing is carried out on the target image to be detected through a target detection model, a target detection result is obtained, and the target detection result is used for representing whether the medicinal glass tube has defects or not and the defect type; according to the invention, the detection rate of defective products, especially small defective products, is improved, the false detection rate and the omission ratio are reduced, the production efficiency and the product quality are improved, and the construction of an intelligent production line is promoted.

The invention provides an FPI optical fiber temperature sensor based on a PDMS filled capillary glass tube, which comprises a capillary glass tube, one end of the capillary glass tube is filled with cured polydimethylsiloxane, the other end of the capillary glass tube is inserted with a single-mode optical fiber, in the capillary glass tube, the end surface of the polydimethylsiloxane is a concave surface, and the end surface of the single-mode optical fiber is a convex surface. The end face of the single-mode optical fiber is a plane, the end face of the polydimethylsiloxane and the end face of the single-mode optical fiber form two reflecting faces of the Fabry-Perot cavity, light input is carried out in the single-mode optical fiber, and light output is carried out in the Fabry-Perot cavity. Displacement of the end face of the polydimethylsiloxane as a function of a temperature change causes an interference wavelength in the Fabry-Perot cavity to be adjusted to map the temperature change. The invention provides the PDMS-filled SCT-based micro-air cavity FPI optical fiber sensor which is simple in structure, easy to manufacture, low in cost, small in size and ultrahigh in precision, and is used for high-precision temperature detection.

This invention relates to an apparatus and method for fabricating microanodes using localized electrochemical deposition additive manufacturing, belonging to the fields of 3D printing technology and electrochemical deposition. The y-axis moving device is threadedly connected to the frame assembly, and the dual-nozzle device is also threadedly connected to the y-axis moving device. The z-axis moving device is fixed to the frame assembly, and the heated bed platform is fixed to the z-axis moving device. An inert metal wire cutting device is installed on the connecting shaft between the z-axis moving device and the heated bed platform. The advantages are: it automates the fabrication of microanodes using localized electrochemical deposition additive manufacturing, improving the efficiency of microanode fabrication and saving manpower, material resources, and financial resources; it solves the difficulties of traditionally using capillary glass tubes to encapsulate extremely fine inert metal wires, allowing for convenient encapsulation of inert metal wires with diameters below 20 micrometers; it utilizes laser cutting for post-processing the electrode, avoiding the difficulty of grinding a smooth electrode surface; and the electrode shape can be designed by computer, without shape limitations.

The present invention relates to the technical field of industrial process control and detection. Disclosed is a method for real-time measurement of length-width size distribution of a crystal population in a crystallization reactor using binocular telecentric cameras. In-situ environment calibration is performed for a binocular telecentric stereo vision system, a calibration rod capable of probing into an in-situ environment (a reactor / glass tube) is designed, a binocular telecentric stereo vision imaging model is established, and a simple calibration method of rotating the calibration rod suitable for an in-situ limited space and a calibration plate design scheme are proposed. In order to improve binocular matching efficiency, a simplified telecentric stereo epipolar rectification method is further provided, so as to ensure accurate matching of on-site snapshot image pairs. On the basis of the matched image pairs, a three-dimensional reconstruction method using analytical solution-based ray intersection is provided to measure the three-dimensional pose of particles within a crystallizer. Finally, the three-dimensional length and width of a crystal are quantitatively evaluated by means of statistical data of Euclidean distances of pairs of length and width feature points of the crystal. The present invention has high operability, and can achieve the effect of automatically measuring the three-dimensional size of crystals.

The utility model discloses a hollow-core and solid-core hybrid optical fiber cable, which belongs to the technical field of hollow-core optical fiber cables and comprises at least one hollow-core optical fiber, and each hollow-core optical fiber comprises a hollow-core unit and a wrapping layer. The hollow core unit comprises a plurality of hollow core glass tubes which are annularly arranged at equal intervals, and the hollow core glass tubes provide air fiber cores for the hollow core optical fiber to complete optical signal transmission; the cladding is a quartz cladding, and at least two solid fiber cores are arranged in the cladding; the axis of the solid fiber core and the axis of the hollow glass tube are both parallel to the axis of the hollow fiber. The optical cable provided by the utility model not only can meet the end face positioning requirement when the end face of the hollow-core optical fiber is centered and welded, but also can enable the hollow-core optical fiber to have the capability of breakpoint detection, meets the application of the OTDR technology in the hollow-core optical fiber, improves the application and maintenance convenience of the hollow-core optical fiber, and is matched with the mixed cabling of the hollow-core optical fiber and the G.652D, G.654E or G.655 solid-core optical fiber, so that the service life of the hollow-core optical fiber is prolonged, and the service life of the hollow-core optical fiber is prolonged. The comprehensive performance and the application range of the hybrid optical cable are greatly improved, and the hybrid optical cable has excellent practical value.

The invention belongs to the technical field of petroleum and natural gas development, and particularly relates to a visual reservoir core relative permeability high-precision measuring device and method based on an unsteady state method. The device comprises a clamp holder, three glass tubes, a flow drum, a water metering pump, a gas-liquid separation tube, an annular pressure pump, a gas cylinder, an annular pressure sensor, a pressure regulating valve and an injection pressure sensor. The holder comprises a support, a barrel, a pull rod nut assembly, an adjusting screw rod, a restraint frame, an inlet plug, two pressing caps, a baffle ring, a sealing ring, a rock core cone, a transparent rubber sleeve and an outlet plug. The method comprises the following steps: 1, core pretreatment; 2, carrying out liquid measurement on the permeability; 3, displacement pressure is determined; 4, calculating the pore volume of the rock core; and 5, gas-driven water test and dynamic permeability calculation. The problems that reservoir rock core relative permeability measuring equipment is complex, inaccurate and difficult to use, and the stress state of the rock core is not comprehensively simulated are solved.

The invention relates to the technical field of cutting equipment, and discloses a fixed-length cutting device for glass tube processing based on laser cutting, a laser device is mounted on one side of a workbench through bolts, a positioning piece is arranged on one side of the upper end of the workbench, a hydraulic rod and a driving piece are fixedly mounted in the workbench, and a fixed-length assembly is arranged at one end of the hydraulic rod; the fixed-length assembly comprises a lantern ring rotationally connected with the hydraulic rod, multiple sets of conveying mechanisms are symmetrically arranged on the inner wall of the lantern ring, and a cleaning piece is arranged on one side of the lantern ring; the conveying mechanism comprises an elastic part connected with the inner wall of the lantern ring, the middle of the outer wall of the elastic part is sleeved with a roller, clamping parts are arranged on the two sides of the outer wall of the elastic part, full-process automatic batch machining of fixed-length feeding, rotary cutting, reset cleaning and fixed-length feeding is achieved, and manual intervention is reduced.

The utility model discloses a Bernoulli equation experimental device applied to teaching, and mainly solves the problem that the existing experimental device is large in size. The experimental device comprises a main glass tube platform, a self-circulating main glass tube which is arranged on the main glass tube platform and is provided with a plurality of bent sections, a water pump which is arranged on the main glass tube and is used for realizing fluid self-circulation, a flow meter which is arranged on the main glass tube and is used for measuring fluid flow, and a plurality of test interfaces which are arranged on the main glass tube, and the pressure measuring device is connected with the testing interface and is used for measuring fluid pressure. According to the utility model, a semi-closed fluid self-circulation structure is adopted, and the fluid self-circulation of the experimental device is realized under the action of the water pump, so that the structures such as an open water tank of the traditional Bernoulli experimental device are omitted. And compared with a long straight pipeline of traditional experimental equipment, the main pipeline is bent, so that the miniaturization of the experimental device is realized. The closed main pipeline structure also prevents the fluid from scattering in the laboratory, and ensures that the ground of the laboratory is dry and clean.

An absorber tube for a parabolic trough solar power plant is described. The absorber tube includes a glass pipe that extends from a first end to a second end of the parabolic trough. A helical pipe is enclosed within the glass pipe. The helical pipe is configured to hold water. A sand filled pipe is surrounded by the helical pipe. The absorber tube further includes an inner pipe, centered within the sand filled pipe and the inner pipe extends from the first end to the second end of the parabolic trough along a central axis of the glass pipe. A solenoid valve is connected between the helical pipe and the inner pipe. The solenoid valve is configured to block the water from entering the inner pipe during periods of high solar irradiance and release the water to the inner pipe during periods of low solar irradiance.

The invention relates to the technical field of glass tube detection, in particular to an acoustic detection system and an analysis method for the wall thickness uniformity of a soda-lime glass tube. The acoustic analysis method comprises the following steps: transmitting a pulse electromagnetic wave, receiving a reflection signal reflected from the surface of the soda-lime glass tube, and converting the reflection signal into an electric signal; performing variational mode decomposition on the electric signal, calculating variance contribution rate of each function to screen an objective function, reconstructing the signal based on the objective function and extracting an envelope curve; identifying adjacent peak points of the envelope curve, recording a time difference, and calculating the wall thickness; selecting a plurality of measuring points on the same section of the soda-lime glass tube to obtain the wall thickness of each point, and calculating the maximum value, the minimum value and the average value to evaluate the uniformity; the acoustic detection system comprises a signal acquisition module, a signal processing module, a wall thickness calculation module and a uniformity analysis module. In this way, the effect of improving the acoustic detection efficiency and precision of the wall thickness uniformity of the soda-lime glass tube is achieved.

The invention relates to the technical field of test tube processing, and provides a forming device for test tube processing, which is characterized by comprising a conveying roller way, a circulating conveying piece, a flame projector and an opening mechanism, the conveying roller way is used for intermittently conveying glass tubes, the flame projector is arranged below the conveying roller way, and the flame projector is used for heating the glass tubes; the circulating conveying piece is arranged at the discharging end of the conveying roller way, an opening mechanism used for supporting the inner circumferential wall of a glass tube bottle opening is arranged on the circulating conveying piece, the opening mechanism comprises a mounting ring frame rotationally connected to the circulating conveying piece and an opening rod arranged on the mounting ring frame in a sliding mode, and the conveying roller way comprises rollers. A main shaft of the mounting ring frame is parallel to a main shaft of the roller, and the opening rod is configured to move in the radial direction of the mounting ring frame after moving so as to abut against the inner circumferential wall of the bottle opening and drive the glass tube to rotate. According to the technical scheme, the technical problem that the bottom of the test tube is not flat easily when the test tube is cut by flame in the prior art is solved.

The invention provides a laser packaging device and method for a microminiature atomic gas chamber, the laser packaging device comprises a plurality of lasers, a balancing weight and a displacement table, the plurality of lasers are arranged on the displacement table, the displacement table can move left and right, the displacement table is provided with a central positioning point, and the balancing weight is hung at the lower end of the atomic gas chamber; the laser packaging device is moved to the position under the atomic gas chamber through a displacement table, the displacement table is adjusted, so that the center positioning point is located under a glass pipeline of the atomic gas chamber, and laser centers of the multiple lasers are converged on the glass pipeline; and laser output is turned on, the glass pipeline of the atomic gas chamber is heated by the laser until the gas chamber is pulled down by the gas chamber balancing weight, and gas chamber laser packaging is completed. According to the technical scheme, the technical problems that when air chamber packaging is carried out in an existing laser packaging mode, the air chamber needs to be matched with rotation, the air chamber is subjected to primary packaging through a blow lamp and then subjected to secondary packaging through laser, primary discharging of the air chamber on a vacuum table is difficult to achieve, and the pressure accuracy of the secondary packaging air chamber is reduced are solved.

The invention provides a full-automatic coupling device and method for a vitrification packaging micro-optical device, and the device comprises a first clamp mechanism, a second clamp mechanism, a glue transferring mechanism and a glue dispensing mechanism which are disposed on a damping platform, and the first clamp mechanism and the second clamp mechanism are used for clamping different optical fiber collimators respectively. The positions of the corresponding optical fiber collimators are adjusted, and the two optical fiber collimators are inserted into the two ends of the glass tube respectively; the glue dispensing mechanism is used for dispensing the two ends of a glass tube, the glue transferring mechanism is used for clamping the glass tube and controlling the glass tube to rotate, and the glue transferring mechanism is matched with the optical fiber collimator to be pulled and inserted in the glass tube, so that uniform distribution of glue between the optical fiber collimator and the glass tube is realized; the first clamp mechanism and the second clamp mechanism are also used for adjusting the positions of the corresponding optical fiber collimators, so that the two optical fiber collimators are coupled in the glass tube; through the above structure, full-automatic coupling packaging of the vitrification packaging micro-optical device is realized, and the coupling packaging efficiency and precision are improved.

The utility model discloses a vertical conveying mechanism for glass tube stacks. The vertical conveying mechanism comprises a main bracket, a main bracket lifting mechanism, a front stop lever, a rear stop lever and a conveying plate, the pair of main brackets is synchronously driven by the main bracket lifting mechanism and can vertically ascend and descend. The pair of front stop levers are arranged on the front sides of the two main brackets respectively, and the bottoms of the front stop levers are in butt joint with the conveying plate; the pair of rear stop levers are respectively arranged on the rear sides of the two main brackets, and a certain distance is reserved between the bottom of each rear stop lever and the conveying plate to form an opening for forward conveying of the glass tube; the front stop lever and the rear stop lever form a vertical path matched with the width of a stacked glass tube; the pair of conveying plates is symmetrically arranged on the lower portion of the wall plate and is in butt joint with the position where the main bracket descends to the bottom. According to the glass tube conveying device, stacked glass tubes can be vertically conveyed, and the vertical working space is fully utilized, so that the horizontal working space is saved, the length of equipment is shortened, and the occupied area is reduced.

The invention relates to a micro-convex structure optical fiber image transmission array and a preparation method and application thereof. The method comprises the following steps: drawing a core material glass rod and a skin material glass tube into a primary monofilament; drawing the black absorption glass rod into a light absorption glass gap wire; drawing the skin glass rod into a skin glass gap wire; performing hexagonal densest arrangement on the primary monofilaments, sequentially inserting light absorption glass gap filaments and skin glass gap filaments into gaps of the primary monofilaments to obtain a primary composite rod, and drawing the primary composite rod into primary multifilaments; arranging the primary multifilaments in a hexagonal densest manner to form a secondary composite rod, and drawing the secondary composite rod into secondary multifilaments; performing hexagonal densest arrangement on the secondary multifilaments, performing fixed-length cutting, arranging the secondary multifilaments into plate sections, and performing hot melt pressing on the plate sections to form molten fiber rods; post-processing the fused fiber rod into an optical fiber image transmitting array; and carrying out ion beam etching on the optical fiber image transmission array in vacuum. According to the method, the convex structure on the surface of the output end of the optical fiber image transmitting array is prepared by using an ion beam bombardment etching process, and the uniformity of surface etching processing of the convex structure is improved.

The invention provides an anti-fracture and treatment auxiliary traction device for a glass tube production line, and relates to the technical field of glass tube production, the anti-fracture and treatment auxiliary traction device comprises a bearing base body, the two ends of the bearing base body are provided with a feeding port and a discharging port respectively, and the inner side of the feeding port is provided with a photoelectric sensor used for detecting whether a glass tube is broken or not; the two groups of traction modules are symmetrically arranged and are used for flexibly pulling the glass tube to move; the two ends of the traction module are rotationally connected to the bearing base body through the composite driving mechanism. The composite driving mechanism is triggered by the photoelectric sensor to synchronously turn over and adjust the distance to achieve second-level broken pipe treatment, pipe diameters of multiple specifications are adapted by means of three-point flexible clamping and dynamic adjustment of the axial limiting mechanism, uniform pressure application of the flexible traction belt, spring buffering and vibration resistance and a vibration self-cleaning system are combined, and the mechanical performance of the flexible traction belt is improved. While low-damage traction of the glass tube is guaranteed, automatic fragment cleaning and stable production of high-frequency starting and stopping are achieved.

This invention discloses a doped and optimized ultra-low attenuation single-mode optical fiber, comprising a core, an inner cladding covering the core, and an outer cladding covering the inner cladding. The fiber fabrication method includes the following steps: 1) selecting a glass tube and a solid glass rod, and fitting the glass tube over the solid glass rod; 2) welding quartz rods to both ends of the glass tube; 3) placing the glass tube in a graphite furnace and doping the inner surface of the glass tube and the outer surface of the solid glass rod with alkali metals; 4) controlling the pressure and temperature inside the graphite furnace to fuse the glass tube and the solid glass rod into a single unit, forming the core; 5) forming an inner cladding around the core, followed by forming an outer cladding, to obtain the ultra-low attenuation single-mode optical fiber. The core obtained by this invention has the characteristics of large outer diameter, low hydroxyl content, high potassium concentration, and good longitudinal uniformity. By selecting appropriate inner and outer claddings to fabricate the optical fiber, the resulting fiber exhibits extremely superior ultra-low loss performance.

The invention provides a magnetic reed switch and a preparation method thereof, and the preparation method comprises the steps: carrying out the grooving of a nickel-iron wire or a nickel-iron sheet, and obtaining a static reed with one end provided with a first positioning groove; grooving the nickel-iron wire material and welding a hollow pipe to obtain a movable contact spring with a second positioning groove at one end; plating layers are plated on the surfaces of the movable reed and the static reed; metal pieces are welded to the first positioning groove of the static reed and the second positioning groove of the movable reed, and a static reed assembly and a movable reed assembly are obtained respectively; the ends, provided with the metal pieces, of the movable reed assembly and the static reed assembly are packaged in a glass tube, the metal pieces in the movable reed assembly and the static reed assembly are arranged in a non-contact crisscross mode, and finally the magnetic reed switch is manufactured. By additionally arranging the high-melting-point metal pieces which are distributed in the crisscross manner at the end parts of the movable magnetic reed and the static magnetic reed, the magnetic contact area is effectively reduced, the rebounding time of the magnetic reed is shortened, and the ablation of a switching arc to the magnetic reed is reduced.

The invention relates to the technical field of household appliances, and discloses a dish-washing machine control method and device, a dish-washing machine, a storage medium and a program product, a glass tube is arranged around a discharge electrode, so that the contact between the discharge electrode and a medium is isolated, and the corrosion rate of the discharge electrode by the medium is reduced. Moreover, the controller is used for monitoring the feedback voltage of the discharge electrode in real time and comparing the feedback voltage with a feedback voltage threshold value, so that whether the ozone generator breaks down or not is judged, fault reminding is carried out when the fault is detected, the ozone generator can be conveniently reminded to be maintained in time, and the ozone manufacturing efficiency and the sterilization effect of the dish washing machine are guaranteed.

The application provides a preparation method of a Si-based multi-component alloy bonding layer in an environmental barrier coating, and steps are as follows: S1, substrate preparation: taking SiC fiber reinforced SiC composite material as a substrate; S2, preparation of the Si-based multi-component alloy bonding layer: S21, the preparation process is carried out in a directional solidification crystal growth furnace, the furnace comprises a quartz glass tube, a graphite crucible and a heating device; S22, adding silicon material and X metal material into the graphite crucible; S23, fixing the substrate above the graphite crucible; S24, vacuumizing the quartz glass tube; S25, introducing cooling water, turning on the power supply, heating the graphite crucible through the heating device, until the silicon material and the X metal material in the graphite crucible are completely melted into Si-based alloy melt with fluidity; S26, immersing the pre-grown coating composite material substrate into the melt, and then gradually separating the substrate from the Si-based alloy melt through slow downward pulling of the graphite crucible, growing the Si-based alloy on the surface of the composite material uniformly, and preparing the Si-based multi-component alloy bonding layer.

Methods for producing glass articles from laminated glass tubing include introducing the glass tubing to a converter. The glass tubing includes a core layer under tensile stress, an outer clad layer under, and an inner clad layer. The methods include forming a feature the glass article at a working end of the laminated glass tubing and separating a glass article from the working end of the laminated glass tubing, which may expose the core layer under tensile stress at the working end of the glass tubing. The method further comprises remediating the exposed portion of the core layer by completely enclosing the core layer in a clad layer. Systems for re-cladding the exposed portion of the core layer as well as glass articles made using the systems and methods are also disclosed.

1. Name of this design product: Electronic glass tube label. 2. Purpose of this design product: used for tracing the source of semiconductor electronic glass tubes. 3. The key design point of this design product lies in the combination of shape and pattern. 4. The picture or photo that best illustrates the key points of the design: main view.