The Tentative Study On Air-bubble Elimination And Temperature Control Technology In Process Of Automatic High Frequency Inductive-heating Melting Sample

Specimen offered by The high-frequency inductive-heating machine could effectively eliminate the pellet effect and the mineral effect, and might greatly reduce the substrate effect influence, made the analysis resultaccuracy greatly to enhance, and so on the quality control was advantageous to the cement production.Fusional sample already to become one of X fluorescence analysis system type main methods.The high-frequency inductive-heating machine has used the high-frequency inductive-heating principle.when the use high frequency induction furnaceheats up, does not need preheating, the rate of heating is quick. We may use the high temperature infrared sensor to carry ontemperature gathering, thus control temperature. It thermal process, elevation of temperature speed, final temperature,crucible swing time, scope, speed, cooling time, whether usesventilator cooling as well as the cooling amount of wind size and soon may establish in advance, moreover an adjustment, does not needfrequently to replace. More importantly, all movements automatically complete by theprocedure control, may from vacillate uniform, the generating previeweven is reliable.This article take develops the automatic high frequency inductive-heating as a background, and analysis high frequency inductive-heating development present situation, heating principle and each part of constitutions.Analyzed the function of the temperature control and the elimination air bubbleinstallment to eliminate the air bubble flaw of the sample. This article's main content:1. IntroductionIntroduced X beam fluorescence analysis vital role and superiority and flawof the sample preparation type. Thus article has revealed the high frequency inductive-heating preparation sample superiority and actual value.2. High frequency inductive-heating's principle and technical analysisIntroduced the high frequency inductive-heating's principle.Then analyzed the high frequency inductive-heating power supply, choosing the in-line syntony circuit by comparing parallel syntony circuit with in-line syntony circuit in induced excellent shortcoming in heating. Have analysed induced the current situation and trend heating a power source. Proposed the design frequency multiplication type IGBT high frequency inductive-heating power supply, designed correspondingly power supply's main circuit. Introduced the air bubble flaw, and proposed the solution.3. Temperature measure and control systemThis chapter has analyzed the high frequency melt prototypecharacteristic,and built the temperature measure system. Chose in the industry control to be mature and applies the widespread PID control system, simply introduced the PID control type and themethod, designed a set of PID control system, and carried on thesimulation through Matlab software. Will build the good temperaturesurvey and the control system carries on the experiment to analyze,adjustment temperature control curve.4.Design of equipment of bubble equipment of the high frequencyThis chapter studied on the formation, the growth, the dissolution, the rising of air bubble in the sample.Compared with manual elimination air bubble designed two sets ofmachineries to eliminate the air bubble structure, and has carried on the actual elimination air bubble effect experiment.Below the bias vibrator unit experiment discovers these questions:(1) The elimination air bubble effect is not obvious, the different oscillation amplitude, under the different frequency, all is unable to thoroughly eliminate air bubble.(2) there has noise in the oscillation amplitude and a frequency bigger situation.(3) In the vibration process, between the platinum crucible and theinduction coil distance throughout is changing, affects heats up the efficiency.No fast returning characteristic crank rocker organizationexperiment result:(1) Simulates the manual effect to be extremely good, may completelyremove the air bubble(2) Movement steady, the speed is even, does not have the noise.(3)Fixed the induction coil to crucible on, along with the cruciblesame place movement, guaranteed heats up evenlyTwo contrasts indicated:Not fast returns to the characteristic crank rocker organizationelimination air bubble the effect to be good.The movement steadilydoes not have the noise, moreover heats up evenly, is a set of bettereliminations air bubbles installment.5.The experiment and the analysis of high frequency nductive-heating producing sample.In order to appraise the high frequency melt prototype which designs,this topic will carry on some experiments. X beam fluorescence spectrum analysis needs to treat measured the testspecimen prepares has certainly smooth superficial and thickness preview. According to fuses the preview the manufacture standard produce the sample. The entire manufacture sample process basically including next three processes: The melting, swing and elimination air bubble,cooling.Put the sample on X beam fluorescenceanalyzer on carries on the analysis, the determination fuses thepreview the preparation effect.6. Conclusion and forecastThis article embarks from the theory and the development actualproduct topic, both proposed the product design theory basis,and finished the practical application product designproposal, moreover has prepared the accurate sample, has provided one better method to produce sample of X fluorescence analysis system. Follows the high accuracy X fluorescence analyzer to be more and morebig in our country sales volume, will certainly to have the very goodmarket prospect.