CN116256146A - High-temperature molten glass bead liquid drop collision device and method - Google Patents
High-temperature molten glass bead liquid drop collision device and method Download PDFInfo
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- CN116256146A CN116256146A CN202310306398.0A CN202310306398A CN116256146A CN 116256146 A CN116256146 A CN 116256146A CN 202310306398 A CN202310306398 A CN 202310306398A CN 116256146 A CN116256146 A CN 116256146A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
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Abstract
The invention belongs to the technical field of droplet collision experiments, and particularly relates to a high-temperature molten glass bead droplet collision device and a high-temperature molten glass bead droplet collision method, wherein the device comprises a collision experiment box, the collision experiment box is divided into an upper chamber and a lower chamber, a double-cavity quartz crucible is arranged in the upper chamber, a heating system is arranged outside the double-cavity quartz crucible, mechanical nozzles extending into the lower chamber are arranged at openings on the bottom surfaces of two chambers of the double-cavity quartz crucible, and respective bending angles of the two mechanical nozzles can be adjusted; a temperature measuring system, a water cooling temperature control system and an air supply system are arranged at the upper chamber. According to the invention, differential pressure driving is adopted, glass bead molten liquid drops in two quartz cavities are respectively ejected from nozzle openings at the tail ends of the two quartz cavities, two molten liquid drops with different particle diameters and speeds are generated by controlling an electromagnetic induction heating controller and different air pressures, a high-speed camera is used for shooting in the collision process, a high-temperature and high-pressure environment is simulated, and the collision of liquid drops with different angles is realized.
Description
Technical Field
The invention belongs to the technical field of droplet collision experiments, and particularly relates to a droplet collision device and method for high-temperature molten glass beads.
Background
The liquid drop collision is a common phenomenon in various hydrodynamic processes in the fields of nature and engineering, and the research on the liquid drop collision and the fusion process thereof has important academic significance for deepening the understanding of the liquid drop collision and the fusion physical process and has practical application value for guiding related industrial processes. The phenomenon of liquid drop collision is commonly existing in the natural world and the industrial field, has wider application in chemical engineering such as spray combustion, biopharmaceutical, aerospace, dairy product processing and the like, and has important theoretical and practical significance in developing the research of liquid drop collision. The type of droplet, the diameter of droplet, the collision speed and angle of droplet, etc. have important effects on the collision result of droplet. The traditional droplet collision experiment mainly focuses on nonmetallic droplet collision at normal temperature and normal pressure, but the nonmetallic molten droplet collision experiment aiming at the high-temperature and high-pressure environment is not reported in the literature.
Currently, the most commonly used device for droplet ejection is a piezoceramic droplet generator. Chinese patent publication No. CN204870075U discloses a droplet ejecting unit and an ejecting device actuated by a piezoelectric ceramic, which ejects droplets by using piezoelectric ceramic extrusion contraction. However, the curie point temperature of the typical piezoelectric ceramic is usually 120-360 ℃, and the piezoelectric ceramic cannot be used for spraying high-temperature molten nonmetallic liquid drops, such as hollow glass microspheres of inorganic nonmetallic materials. In addition, a device for generating droplets by pneumatic driving is disclosed in chinese patent publication No. CN106092506a, which discloses a high-speed droplet/wall liquid film oblique collision test device that uses high-pressure gas to squeeze lubricating oil to generate droplets, but the test device is also performed at normal temperature and pressure, and no non-metallic molten droplet collision at high temperature and pressure can be realized.
The hollow glass beads are micron-sized light materials, and have the advantages of light weight, low heat conduction, high strength, good chemical stability and the like, and the density is generally 0.1-0.7 g/cm 3 Far lower than various plastic materials. The hollow glass microsphere is a hollow micron-sized glass spherical material, has the characteristics of low density, high strength, sound insulation, heat insulation, good chemical stability, good dispersibility and the like, and is widely applied toPetroleum exploration, aerospace, new energy automobiles, emulsion explosives and other industries. Glass beads are novel inorganic nonmetallic materials which have wide application and special performance and are developed in recent years. Glass beads are special materials with the remarkable characteristics of high strength, good fluidity, excellent optical performance and the like, and are widely applied to light reflecting materials, purifying and polishing materials, filling materials, carrier materials and the like in the fields of military, aviation, building materials and other high technologies.
With the continuous development of science and technology and the continuous improvement of the requirements of users on the product performance, the diameters of the glass beads are smaller and smaller, the range can reach several micrometers to hundreds of micrometers, the varieties are also more and more abundant, and the glass beads comprise solid glass beads, hollow glass beads, porous glass beads and the like. The production method of the glass beads is divided into a physical method and a chemical method, and the technical development of preparing the glass beads by adopting the physical method is mature. The solid-phase glass powder method commonly used in production is a physical method, and the method is characterized in that glass powder and fuel are sprayed into a spheroidizing furnace, so that glass powder particles are sufficiently heated and melted to obtain molten glass bead drops, and most of glass bead drops are collided and separated in the process, but the microscopic movement process is difficult to capture due to the overhigh temperature in the furnace. The particle size distribution of the hollow glass beads is generally below 20 mu m, so that the hollow glass beads have high strength and tensile strength.
Because the hollow glass beads have excellent performances in all aspects, the research on the collision of the hollow glass beads in a molten state at high temperature and high pressure has important research value in the related industrial field, and the form of the collision of the liquid drops on the wall surface has very important significance. The prior art lacks a device for collision of nonmetallic liquid drops under high temperature and high pressure, and also lacks a device capable of adjusting the collision angle based on the technology.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a device and a method for collision of high-temperature molten glass bead liquid drops.
In order to achieve the technical purpose and the technical effect, the invention is realized by the following technical scheme:
the invention provides a high-temperature molten glass bead liquid drop collision device which comprises a collision experiment box, wherein the collision experiment box is divided into an upper cavity and a lower cavity, the top end of the upper cavity is provided with a box cover capable of being opened, a double-cavity quartz crucible is arranged in the upper cavity of the collision experiment box, a heating system for heating the double-cavity quartz crucible is arranged outside the double-cavity quartz crucible, two cavities with holes on the bottom surface are arranged inside the double-cavity quartz crucible, a mechanical nozzle extending into the lower cavity is arranged at the position of each cavity with the holes on the bottom surface, and the respective bending angles of the two mechanical nozzles can be adjusted; the collision experiment box is located at the upper cavity and is provided with a temperature measuring system for monitoring the temperature of the inner cavity of the upper cavity and a water cooling temperature control system for controlling the temperature of the inner cavity of the upper cavity, and the collision experiment box is located at the upper cavity and is externally connected with a gas supply system capable of generating pressure difference to drive the mechanical nozzle to spray.
Further, in the high-temperature molten glass bead droplet collision device, the heating system comprises an electromagnetic induction heating controller, an electromagnetic induction heating coil and a ceramic heating sleeve, the electromagnetic induction heating coil is installed on the outer side of the double-cavity quartz crucible through the ceramic heating sleeve, the electromagnetic induction heating coil is connected with the electromagnetic induction heating controller located outside a collision experiment box, the ceramic heating sleeve is made of conductive ceramic materials capable of being heated by electromagnetic induction, and after the ceramic heating sleeve is heated, the double-cavity quartz crucible is heated in a heat conduction mode.
Further, in the high-temperature molten glass bead droplet collision device, the mechanical nozzle is made of a high-temperature resistant material, and is controlled by a PLC (programmable logic controller), and after an angle change command is input, the angle change is regulated on the same axis; the two mechanical nozzles can spray high-temperature molten liquid drops on the same axis at the same angle, so that the liquid drop collision is realized.
Further, in the high-temperature molten glass bead liquid drop collision device, the temperature measurement system comprises a thermocouple and a paperless liquid crystal recorder, the temperature sensing end of the thermocouple is positioned in the collision experiment box, and the lead end of the thermocouple is connected with the paperless liquid crystal recorder.
Further, in the high-temperature molten glass bead droplet collision device, the thermocouple consists of a temperature measuring point, a corundum tube, a stainless steel fastener, a wire protection spring, a temperature measuring coil, a protection wire sleeve and a flat plug; one end of the corundum tube is provided with a temperature measuring point composed of corundum, and the other end of the corundum tube is connected with the flat plug through a temperature measuring coil; the corundum tube is surrounded by a stainless steel fastener, so that the damage caused by overhigh temperature is prevented; the temperature measuring coil is wrapped by a protective wire sleeve, and the flat plug is matched with a socket positioned at the rear of the paperless liquid crystal recorder.
Further, in the high-temperature molten glass bead droplet collision device, the water cooling temperature control system comprises a water tank, an industrial air cooling water chiller and a condensation pipe, wherein the condensation pipe is connected between the water tank and an upper chamber of the collision experiment box, and the condensation pipe is cooled by circulating water supply of the industrial air cooling water chiller.
Further, in the high-temperature molten glass bead droplet collision device, the gas supply system comprises a high-pressure gas cylinder, a high-pressure gas pipe and a gas inlet valve, the two sides of the upper chamber of the collision experiment box are respectively connected with the high-pressure gas pipe with the gas inlet valve, the output end of the high-pressure gas cylinder is communicated with the upper chamber of the collision experiment box through the high-pressure gas pipe on one side, and carbon dioxide gas is filled in the high-pressure gas cylinder; the high-pressure air pipe on the other side extends into the water tank, and a barometer for monitoring pressure change is arranged on a pipe body positioned in the water tank and positioned in the high-pressure air pipe.
Furthermore, in the high-temperature molten glass bead droplet collision device, at least one side surface of the collision experiment box, which is positioned in the lower cavity, is provided with a transparent observation surface, and a high-speed camera is arranged on the outer side of the transparent observation surface.
The invention also provides a high-temperature molten glass bead droplet collision method, which is realized based on the high-temperature molten glass bead droplet collision device and comprises the following steps:
1) Measuring and selecting two hollow glass bead samples with the same particle size in a laboratory, weighing the glass bead samples, and placing the two samples into two chambers of a double-chamber quartz crucible after the measurement is completed uniformly;
2) The high-pressure gas cylinder is debugged, the air tightness of the collision experiment box is observed, and the safety and air tightness problems in the experiment process are ensured;
3) Debugging an electromagnetic induction heating controller, firstly raising a section of temperature to preheat, preventing the temperature from suddenly raising, cracking an internal double-cavity quartz crucible, and gradually raising the temperature to a proper temperature after the preheating is completed, and waiting for reaching a set temperature;
4) Opening an air inlet valve at one side of the high-pressure air cylinder, filling high-pressure air, opening an air inlet valve at the other side after filling the air into the air cylinder for one minute, measuring the air pressure of the high-pressure air through a high-pressure pipe by using an air pressure gauge through a water cooling device, and closing the air inlet valve at one side of the high-pressure air cylinder after filling the air at the set pressure;
5) The angle of the mechanical nozzle is regulated, and the mechanical nozzle is controlled by a PLC (programmable logic controller), so that only an angle command is required to be sent out, and after the angle is regulated;
6) Opening an industrial air-cooled water chiller, performing water circulation control on the temperature in the collision experiment box, and waiting for the set conditions to be met;
7) Measuring and recording the distance between two mechanical nozzles on a transparent observation surface, measuring data, adjusting the focal length of a high-speed camera, starting the high-speed camera to shoot after focusing is finished, controlling the mechanical nozzles to start spraying high-temperature molten glass microsphere drops through a PLC, recording by using the high-speed camera, and shooting in the whole course;
8) Firstly, the industrial air-cooled water chiller is started to the maximum power for cooling treatment, meanwhile, the electromagnetic induction heating controller is closed, the power supply of the electromagnetic electric heating controller is pulled out, the industrial water chiller is closed after the temperature is reduced to the room temperature, the experimental device is disassembled, the double-cavity quartz crucible is cleaned, all data are uploaded to the computer, and the data are stored for convenient subsequent analysis and use.
The beneficial effects of the invention are as follows:
the invention has reasonable structural design, and utilizes electromagnetic induction as a heat source to perform induction heating on the double-cavity quartz crucible, so that the metal in the double-cavity quartz crucible can be rapidly melted in a heat conduction mode to form metal melt; and the two molten glass beads in the two quartz cavities are respectively ejected from nozzle openings at the tail ends of the two molten glass beads by adopting differential pressure driving, two molten glass beads with different particle diameters and different speeds are generated by controlling an electromagnetic induction heating controller and different air pressures, and the collision of the molten glass beads with different angles is realized by changing the direction of a mechanical nozzle, and the whole collision process is shot by using a high-speed camera, so that the collision of the molten glass beads with different angles is realized by simulating a high-temperature high-pressure environment.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of a high temperature molten droplet impingement device of the present invention;
FIG. 2 is a cross-sectional view of a crash box of the present invention;
FIG. 3 is an assembly view of a thermocouple according to the present invention;
FIG. 4 is an enlarged view of a portion of a corundum tube at a thermocouple temperature measuring point in accordance with the present invention;
in the drawings, the reference numerals of the components are as follows:
the device comprises a 1-collision experiment box, a 2-mechanical nozzle, a 3-air inlet valve, a 4-high-pressure air bottle, a 5-condensing pipe, a 6-barometer, a 7-water tank, an 8-electromagnetic induction heating controller, a 9-industrial air-cooled cold water machine, a 10-paperless liquid crystal recorder, a 11-high-pressure air pipe, a 12-thermocouple, a 13-temperature measuring point, a 14-corundum pipe, a 15-stainless steel fastener, a 16-wire protection spring, a 17-temperature measuring coil, a 18-protection wire sleeve, a 19-flat plug, a 20-heating coil and a 21-double-cavity quartz crucible.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a high-temperature molten glass bead droplet collision device, which comprises a collision experiment box 1, wherein the collision experiment box 1 is divided into an upper cavity and a lower cavity, the top end of the upper cavity is provided with a box cover which can be opened, a double-cavity quartz crucible 21 is arranged in the upper cavity of the collision experiment box 1, a heating system for heating the double-cavity quartz crucible 21 is arranged outside the double-cavity quartz crucible 21, two cavities with holes on the bottom surface are arranged inside the double-cavity quartz crucible 21, mechanical nozzles 2 which extend into the lower cavity are arranged at the holes on the bottom surface of each cavity, and the respective bending angles of the two mechanical nozzles 2 can be adjusted; the collision experiment box 1 is located at the upper chamber and is provided with a temperature measuring system for monitoring the temperature of the inner cavity of the upper chamber and a water cooling temperature control system for controlling the temperature of the inner cavity of the upper chamber, and the collision experiment box 1 is located at the upper chamber and is externally connected with an air supply system capable of generating pressure difference to drive the mechanical nozzle to spray.
The heating system comprises an electromagnetic induction heating controller 8, an electromagnetic induction heating coil 20 and a ceramic heating sleeve, wherein the electromagnetic induction heating coil 20 is arranged on the outer side of the double-cavity quartz crucible 21 through the ceramic heating sleeve, the electromagnetic induction heating coil 20 is connected with the electromagnetic induction heating controller 8 positioned outside the collision experiment box 1, the ceramic heating sleeve is made of conductive ceramic materials capable of being heated by electromagnetic induction, and after the ceramic heating sleeve is heated, the double-cavity quartz crucible 21 is heated in a heat conduction mode.
The mechanical nozzle 2 is made of high-temperature resistant materials, is controlled by a PLC, and adjusts the angle change on the same axis after inputting an angle change command; the two mechanical nozzles 2 can spray high-temperature molten liquid drops on the same axis at the same angle, so as to realize the collision of the liquid drops.
The temperature measurement system comprises a thermocouple 7 and a paperless liquid crystal recorder 10, wherein the temperature sensing end of a thermocouple 12 is positioned in the collision experiment box 1, and the lead end of the thermocouple 12 is connected with the paperless liquid crystal recorder 10.
The thermocouple consists of a temperature measuring point 13, a corundum tube 14, a stainless steel fastener 15, a wire protection spring 16, a temperature measuring coil 17, a protection wire sleeve 19 and a flat plug 18; one end of the corundum tube 14 is provided with a temperature measuring point 13 composed of corundum, and the other end of the corundum tube 14 is connected with a flat plug 18 through a temperature measuring coil 17; the corundum tube 14 is surrounded by a stainless steel fastener 15 to prevent damage due to overhigh temperature; the temperature measuring coil 17 is wrapped by a protective wire sleeve 19, and the flat plug 18 is matched with a socket positioned at the rear of the paperless liquid crystal recorder 10.
The water cooling temperature control system comprises a water tank 7, an industrial air cooling water chiller 9 and a condensing pipe 5, wherein the condensing pipe 7 is connected between the water tank 7 and the upper chamber of the collision experiment box 1, and the condensing pipe 7 is cooled by circulating water supply of the industrial air cooling water chiller 9.
The gas supply system comprises a high-pressure gas cylinder 4, a high-pressure gas pipe 11 and a gas inlet valve 3, wherein the two sides of the upper chamber of the collision experiment box 1 are respectively connected with the high-pressure gas pipe 11 with the gas inlet valve 3, the output end of the high-pressure gas cylinder 4 is communicated with the upper chamber of the collision experiment box 1 through the high-pressure gas pipe 11 at one side, and carbon dioxide gas is filled in the high-pressure gas cylinder 4; the high-pressure air pipe 11 on the other side extends into the water tank 7, and the pipe body of the high-pressure air pipe 11 in the water tank 7 is provided with a barometer 6 for monitoring pressure change.
At least one side surface of the collision experiment box 1 positioned in the lower cavity is set to be a transparent observation surface, and a high-speed camera is arranged on the outer side of the transparent observation surface.
The high-temperature molten glass bead liquid drop collision device has the following characteristics:
1. the device can be used for designing and researching hollow glass beads, and heating the hollow glass beads to form liquid drops in a molten state;
2. the form of the inorganic nonmetallic material can be changed by changing the adjustment of the electromagnetic induction heater, and the temperature of the whole collision device box body is kept unchanged greatly by setting of the water cooling device;
3. after the hollow glass beads reach a molten state, the high-pressure gas cylinder releases carbon dioxide gas, and the gas pressure is monitored in real time through a barometer;
4. the collision angle of the hollow glass beads in the molten state can be controlled by a PLC control element to carry out set collision, the method is convenient and quick, is beneficial to accurately positioning the collision relation, and meanwhile, the two mechanical injection nozzles are positioned on the same axis, and the adjustable collision process is different due to different angles, so that the path can be preset for adjustment;
5. all device data can be imported into a computer, so that later statistics data are convenient, the method has important research significance in the industrial field, and the recorded data are convenient for researching collision rules.
Compared with the prior art, the high-temperature molten hollow glass bead collision device solves the problem that the collision of liquid drops cannot be realized under the high-temperature and high-pressure condition at present, provides different angle collision methods under the molten state of the hollow glass beads, and is also suitable for the experimental foundation of the collision of liquid drops under the molten state of the high-melting-point inorganic nonmetallic material; firstly, before the experiment is carried out, the preset experiment raw material parameters are selected more, the particle size, the temperature, the pressure and the angle of the liquid drop collision device are adjustable, under the environmental factors, the experiment under different environments can be simulated, the device has guiding value for various industrial processes in industry, furthermore, the crucible required by the experiment in the experiment device is low in manufacturing cost, simple in structure, convenient to process and quick to replace, the experiment period in industry is effectively shortened, the experiment cost is further reduced, the device is safe and reliable, and the device can be safely used for a long time and repeatedly used under the condition of ensuring high pressure.
The related embodiments of the invention are:
example 1
The embodiment provides a high-temperature molten glass bead collision device, which adopts electromagnetic induction as a heat source to perform induction heating on a ceramic heating sleeve, a double-cavity quartz crucible 21 in the ceramic heating sleeve is heated in a heat conduction mode, a heating coil 20 surrounds the ceramic heating sleeve after an electromagnetic induction heating controller 8 is regulated to a proper temperature, the temperature is continuously raised, the temperature is transferred into the double-cavity quartz crucible 21 in a heat conduction mode, hollow glass beads in the double-cavity quartz crucible 21 are changed into a molten state from a solid state in heating and raising the temperature, meanwhile, a temperature measuring point 13 above the double-cavity quartz crucible is used for monitoring the temperature, and the temperature is measured by a thermocouple 12 and then transferred to a paperless liquid crystal recorder 10 in an electric signal mode for recording data; meanwhile, the high-pressure gas cylinder 4 is opened, the air inlet valve 3 positioned on one side of the high-pressure gas cylinder 4 is opened, high-pressure gas is introduced into the liquid drop collision experiment box 1 through the high-pressure gas pipe 11, the air inlet valve 3 connected to the other side of the collision experiment box 1 is opened after one side of gas is introduced, the high-pressure gas is introduced into the high-pressure gas pipe on the other side, and after the high-pressure gas is cooled by the water tank 7, the pressure change is monitored by the barometer 6, so that the pressure reaches the set pressure.
In this embodiment, collision experiment case 1 comprises last box, lower box, case lid, goes up the box and down designs as an organic wholely between the box, cuboid structure, and lower box is four sides hollow out construction, conveniently observes the record liquid droplet collision, goes up to be the lock between box and the case lid and is connected, and the lock is the sealing washer, guarantees the gas tightness and the high temperature resistant of collision experiment case. The upper box body of the collision experiment box 1 is provided with two temperature measuring holes for placing thermocouples 11, the left side and the right side of the upper box body are respectively provided with a threaded hole for installing an air inlet valve, one side of the air outlet valve is provided with a hole for flowing condensed water, and one side of the air outlet valve is provided with a heating coil installing hole for connecting an electromagnetic induction heating device; the electromagnetic induction heating device is connected with a heating coil and is connected with the collision experiment box 1. The thermocouple consists of a temperature measuring point 13, a corundum tube 14, a stainless steel fastener 15, a wire protection spring 16, a temperature measuring coil 17, a protective wire sleeve 19 and a flat plug 18, and is positioned above the collision experiment box 1, the temperature measuring point 13 consists of corundum, is high-temperature resistant and convenient to replace, the temperature measuring point is formed by a section of corundum tube 14, the corundum tube 14 is surrounded by the stainless steel fastener 15, the corundum tube 14 is prevented from being damaged due to overhigh temperature, the temperature measuring coil 17 is connected with the temperature measuring coil 17 to transmit an electric signal, the temperature measuring coil 17 is wrapped by the protective wire sleeve 19, the electric signal is transmitted to the paperless liquid crystal recorder 10 through the flat plug 18 to record data, and the paperless liquid crystal recorder 10 and the thermocouple thermometer are connected with a socket positioned behind the paperless liquid crystal recorder 10 through a plug of the flat plug 18; a hole for installing a ceramic heating sleeve is formed below an upper box body of the collision experiment box 1, a mechanical nozzle 2 is connected below the upper box body, the mechanical nozzle 2 is in interference fit with the hole below the ceramic heating sleeve, the two mechanical nozzles 2 and the formed hole are on the same axis, an injection hole is formed in the mechanical nozzle 2, electronic element control is adopted, PLC control is adopted, and the electronic element is of the prior art and is not described in detail herein; transparent acrylic plates are arranged on four sides of the lower box body of the collision experiment box 1, so that collision liquid drops are prevented from splashing, and the high-speed photographic instrument can conveniently shoot and record; there is condenser pipe 5 in the water tank 7, and condenser pipe 5 is the heliciform and arranges 3 and be located water tank 7, and water tank 7 structure is the square, and the water storage is about 50 liters, and condenser pipe 5 is closely connected for closing with water tank 7, and the water in the water tank 7 is used for cooling and circulation, and condenser pipe 5 passes through collision experiment case 1 circulation two rings and reaches the purpose that keeps the temperature cooling, and rethread industry forced air cooling cold water machine 9 control temperature reaches the purpose of cyclic utilization. The whole collision device can be additionally provided with an electronic control element, and is controlled by a computer to realize integration.
In the embodiment, a double-cavity quartz crucible is fixed at a through hole at the top in the collision experiment box 1 through a crucible mounting bracket, a crucible cover plate is positioned at the upper part of the collision experiment box 1, the crucible mounting bracket is fixedly connected with the crucible cover plate through a fastening bolt, and a quartz sealing ring is additionally arranged at the through hole at the upper part of the crucible cover plate and the collision experiment box 1; the thermocouple 13 is located at the upper portion of the double-chamber quartz crucible 21. The induction heater copper pipe is nested outside the double-cavity quartz crucible 21 and is connected with the electromagnetic induction heater 9, the induction heater copper pipe is not contacted with the double-cavity quartz crucible, the induction heater copper pipe is sealed with the collision experiment box 1 by high-temperature-resistant glue, the electromagnetic induction heater heats the double-cavity quartz crucible through the induction heater copper pipe, and meanwhile, the industrial air-cooling water chiller is controlled to perform water circulation cooling. The bottom of the double-cavity quartz crucible 21 is of two cylindrical structures, small holes are respectively formed in the opposite side walls according to the equal radius of the central axis of the quartz crucible and are connected with the mechanical nozzle 2, the axes of the two nozzles are positioned on the same horizontal plane, and the corresponding angles are adjustable.
Example two
The embodiment provides a use method of a high-temperature molten glass bead droplet collision device, which comprises the following steps:
firstly, two hollow glass bead samples with the same particle size are selected in laboratory measurement, the glass bead samples are weighed, and after measurement is completed, the two samples are put into two chambers of a double-chamber quartz crucible 21;
secondly, debugging the high-pressure gas cylinder 4, observing the air tightness of the collision experiment box 1, and ensuring the safety and air tightness in the experiment process;
secondly, debugging an electromagnetic induction heating controller 8, firstly raising a section of temperature to preheat, preventing the temperature from suddenly raising, cracking an internal double-cavity quartz crucible, and gradually raising the temperature to a proper temperature after the preheating is completed, and waiting for reaching a set temperature;
secondly, opening an air inlet valve positioned at one side of the high-pressure air cylinder 4, filling high-pressure air, opening an air inlet valve at the other side after filling for one minute, measuring the air pressure of the high-pressure air through a water cooling device by using an air pressure gauge through a high-pressure pipe, and closing the air inlet valve at one side of the high-pressure air cylinder 4 after filling the set pressure;
secondly, the angle of the mechanical nozzle is regulated, and the mechanical nozzle is controlled by a PLC (programmable logic controller), so that only an angle command is required to be sent out, and after the angle is regulated;
secondly, opening an industrial air-cooled chiller, performing water circulation control on the temperature in the collision experiment box 1, and waiting for the set conditions to be met;
secondly, measuring and recording the distance between two mechanical nozzles on a transparent acrylic plate of a lower box body of the collision device, measuring data, adjusting the focal length of a high-speed camera, starting the high-speed camera to shoot after focusing is finished, controlling the mechanical nozzles to start spraying high-temperature molten glass microsphere drops through a PLC, recording by using the high-speed camera, and shooting in the whole course;
and finally, firstly, starting the industrial air-cooled water chiller to the maximum power of 10KW for cooling treatment, simultaneously closing the electromagnetic induction heating controller 8, pulling out the power supply of the electromagnetic electric heating controller, closing the industrial water chiller after the temperature is reduced to the room temperature, disassembling the experimental device, cleaning the double-cavity quartz crucible, uploading all data to a computer, and storing the data for convenient subsequent analysis and use.
Example III
The embodiment provides a high temperature molten glass microballon liquid droplet collision device, and liquid droplet collision device adopts high-speed photographic instrument to catch in the experimentation after realizing the collision liquid droplet whereabouts striking wall.
The phenomenon of droplet impact relates to various scientific problems such as heat and mass transfer, hydrodynamics and the like, and becomes a hot spot problem of engineering research at home and abroad in recent years due to the complexity of an action mechanism and the importance of related industrial processes. Drop impingement is one of the important research topics for fluid mechanics and heat transfer. The liquid drop is composed of continuous phase fluid and discrete phase particles in a multiphase flow (gas-liquid phase mass transfer heat transfer) system. Under certain conditions, the impact of the liquid drops can cause the change of the flowing state and generate complex heat transfer and flowing phenomena, so that the research on the impact process of the liquid drops is necessary. At present, certain achievements are achieved in the aspects of multiscale problems, microscopic motions of liquid drops in continuous phase fluid, heat transfer, interphase mass transfer and the like. However, the existing research is mainly focused on the research on the single droplet impact process or the macroscopic aspects of a single-phase flow field structure, and deep knowledge on the interaction process between two or more droplets is still needed to be further carried out.
The experimental procedure for single droplet impingement on the wall surface is as follows:
firstly, adjusting high-speed camera equipment, focusing to a mechanical nozzle, and pre-opening the high-speed camera for recording data;
secondly, weighing by selecting the size and the mass of the set hollow glass beads, and placing the hollow glass beads into one cavity of the double-cavity quartz crucible 21;
secondly, regulating the temperature of the electromagnetic induction heating controller 8, preheating the process as described in the second embodiment, opening the high-pressure gas cylinder 4, the gas inlet valve and the barometer to monitor the gas pressure when the temperature rises to the specified temperature;
secondly, controlling the angle of the mechanical nozzle to be vertical to the ground through a PLC, opening injection, and carrying out experiments;
finally, the lower box body of the collision device is a wall surface, the high-temperature molten liquid drops to fall on the wall surface, data are recorded through a high-speed camera, the data are stored, and the water cooling circulation is started for cooling.
The experimental procedure for the collision of two droplets against the wall surface is as follows:
the flow is consistent when the single liquid drop collides with the collision wall surface experiment, the camera focuses on the same axis of the two mechanical nozzles, the collision wall surface experiment flow of the liquid drop during injection is recorded, and the method can observe two groups of experimental data at the same time, save the experimental time and facilitate group comparison.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (9)
1. The utility model provides a high temperature melting glass bead liquid drop collision device which characterized in that: the device comprises a collision experiment box, wherein the collision experiment box is divided into an upper chamber and a lower chamber, the top end of the upper chamber is provided with a box cover capable of being opened, a double-cavity quartz crucible is arranged in the upper chamber, a heating system for heating the double-cavity quartz crucible is arranged outside the double-cavity quartz crucible, two chambers with holes on the bottom surface are arranged inside the double-cavity quartz crucible, a mechanical nozzle extending into the lower chamber is arranged at the position of each chamber, which is provided with the holes on the bottom surface, and the bending angles of the two mechanical nozzles can be adjusted; the collision experiment box is located at the upper cavity and is provided with a temperature measuring system for monitoring the temperature of the inner cavity of the upper cavity and a water cooling temperature control system for controlling the temperature of the inner cavity of the upper cavity, and the collision experiment box is located at the upper cavity and is externally connected with a gas supply system capable of generating pressure difference to drive the mechanical nozzle to spray.
2. The high temperature molten glass bead droplet impact device of claim 1, wherein: the heating system comprises an electromagnetic induction heating controller, an electromagnetic induction heating coil and a ceramic heating sleeve, wherein the electromagnetic induction heating coil is arranged on the outer side of the double-cavity quartz crucible through the ceramic heating sleeve, the electromagnetic induction heating coil is connected with the electromagnetic induction heating controller positioned outside the collision experiment box, the ceramic heating sleeve is made of conductive ceramic materials capable of being heated by electromagnetic induction, and the ceramic heating sleeve heats the double-cavity quartz crucible in a heat conduction mode after being heated.
3. The high temperature molten glass bead droplet impact device of claim 2, wherein: the mechanical nozzle is made of high-temperature resistant materials, is controlled by a PLC, and adjusts the angle change on the same axis after inputting an angle change command; the two mechanical nozzles can spray high-temperature molten liquid drops on the same axis at the same angle, so that the liquid drop collision is realized.
4. A high temperature molten glass bead droplet impact device as defined in claim 3, wherein: the temperature measurement system comprises a thermocouple and a paperless liquid crystal recorder, wherein the temperature sensing end of the thermocouple is positioned in the collision experiment box, and the lead end of the thermocouple is connected with the paperless liquid crystal recorder.
5. The high temperature molten glass bead droplet impact device of claim 4, wherein: the thermocouple consists of a temperature measuring point, a corundum tube, a stainless steel fastener, a wire protection spring, a temperature measuring coil, a protection wire sleeve and a flat plug; one end of the corundum tube is provided with a temperature measuring point composed of corundum, and the other end of the corundum tube is connected with the flat plug through a temperature measuring coil; the corundum tube is surrounded by a stainless steel fastener, so that the damage caused by overhigh temperature is prevented; the temperature measuring coil is wrapped by a protective wire sleeve, and the flat plug is matched with a socket positioned at the rear of the paperless liquid crystal recorder.
6. The high temperature molten glass bead droplet impact device of claim 5, wherein: the water cooling temperature control system comprises a water tank, an industrial air cooling water chiller and a condenser pipe, wherein the condenser pipe is commonly connected between the water tank and an upper chamber of the collision experiment box, and the condenser pipe is cooled by circulating water supply of the industrial air cooling water chiller.
7. The high temperature molten glass bead droplet impact device of claim 6, wherein: the gas supply system comprises a high-pressure gas cylinder, a high-pressure gas pipe and a gas inlet valve, wherein the two sides of the upper chamber of the collision experiment box are respectively connected with the high-pressure gas pipe with the gas inlet valve, the output end of the high-pressure gas cylinder is communicated with the upper chamber of the collision experiment box through the high-pressure gas pipe on one side, and carbon dioxide gas is filled in the high-pressure gas cylinder; the high-pressure air pipe on the other side extends into the water tank, and a barometer for monitoring pressure change is arranged on a pipe body positioned in the water tank and positioned in the high-pressure air pipe.
8. The high temperature molten glass bead droplet impact device of claim 7, wherein: at least one side surface of the collision experiment box, which is positioned in the lower cavity, is provided with a transparent observation surface, and a high-speed camera is arranged on the outer side of the transparent observation surface.
9. A high temperature molten glass bead droplet impact method based on the high temperature molten glass bead droplet impact device of claim 8, comprising the steps of:
1) Measuring and selecting two hollow glass bead samples with the same particle size in a laboratory, weighing the glass bead samples, and placing the two samples into two chambers of a double-chamber quartz crucible after the measurement is completed uniformly;
2) The high-pressure gas cylinder is debugged, the air tightness of the box body of the collision device is observed, and the safety and air tightness problems in the experimental process are ensured;
3) Debugging an electromagnetic induction heating controller, firstly raising a section of temperature to preheat, preventing the temperature from suddenly raising, cracking an internal double-cavity quartz crucible, and gradually raising the temperature to a proper temperature after the preheating is completed, and waiting for reaching a set temperature;
4) Opening an air inlet valve at one side of the high-pressure air cylinder, filling high-pressure air, opening an air inlet valve at the other side after filling the air into the air cylinder for one minute, measuring the air pressure of the high-pressure air through a high-pressure pipe by using an air pressure gauge through a water cooling device, and closing the air inlet valve at one side of the high-pressure air cylinder after filling the air at the set pressure;
5) The angle of the mechanical nozzle is regulated, and the mechanical nozzle is controlled by a PLC (programmable logic controller), so that only an angle command is required to be sent out, and after the angle is regulated;
6) Opening an industrial air-cooled water chiller, performing water circulation to control the temperature in the box body of the collision device, and waiting for the set conditions to be met;
7) Measuring and recording the distance between two mechanical nozzles on a transparent observation surface, measuring data, adjusting the focal length of a high-speed camera, starting the high-speed camera to shoot after focusing is finished, controlling the mechanical nozzles to start spraying high-temperature molten glass microsphere drops through a PLC, recording by using the high-speed camera, and shooting in the whole course;
8) Firstly, the industrial air-cooled water chiller is started to the maximum power for cooling treatment, meanwhile, the electromagnetic induction heating controller is closed, the power supply of the electromagnetic electric heating controller is pulled out, the industrial water chiller is closed after the temperature is reduced to the room temperature, the experimental device is disassembled, the double-cavity quartz crucible is cleaned, all data are uploaded to the computer, and the data are stored for convenient subsequent analysis and use.
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| CN117849561A (en) * | 2024-03-08 | 2024-04-09 | 国网四川省电力公司电力科学研究院 | Distribution line discharge melt ignition type fault test device and test method |
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| CN117849561A (en) * | 2024-03-08 | 2024-04-09 | 国网四川省电力公司电力科学研究院 | Distribution line discharge melt ignition type fault test device and test method |
| CN117849561B (en) * | 2024-03-08 | 2024-05-14 | 国网四川省电力公司电力科学研究院 | Distribution line discharge melt ignition type fault test device and test method |
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