【摘要】：在礦熱爐正常生產(chǎn)過(guò)程中,爐內(nèi)發(fā)生復(fù)雜的物理化學(xué)反應(yīng),強(qiáng)大的電流通過(guò)電極導(dǎo)入爐中,電極端部位置影響電弧長(zhǎng)度,進(jìn)而影響爐溫和爐內(nèi)化學(xué)反應(yīng)速度,所以電極的插深需控制在一定范圍內(nèi),不宜過(guò)深或過(guò)淺。由于礦熱爐的電極電流很強(qiáng),即使有爐壁的金屬屏蔽效應(yīng),在爐外也必然會(huì)有反映爐內(nèi)電流大小及方向的磁場(chǎng)信息,因此,通過(guò)獲取這些磁場(chǎng)信息的分布就可得知電極端部等關(guān)鍵參數(shù),這對(duì)于礦熱爐生產(chǎn)過(guò)程中穩(wěn)定爐況、改進(jìn)工藝、降低能耗、減少事故、提高經(jīng)濟(jì)效益等方面具有重要的實(shí)際意義和廣闊的工程應(yīng)用前景。本研究設(shè)計(jì)了一種交流磁場(chǎng)流路徑切向探測(cè)儀,根據(jù)探頭兩次旋轉(zhuǎn)過(guò)程中所測(cè)磁場(chǎng)分量分析磁場(chǎng)流路徑切向,首先探頭繞方位軸轉(zhuǎn)動(dòng)180度,檢測(cè)出該過(guò)程中磁場(chǎng)分量最大值位置,然后在此位置繞俯仰軸轉(zhuǎn)動(dòng)180度,再次檢測(cè)出磁場(chǎng)分量最大值位置,那么最終在該位置通過(guò)指示棒即可指示磁場(chǎng)流路徑切向。本文所做的主要工作如下:(1)探測(cè)儀的工作原理研究。首先,以礦熱爐結(jié)構(gòu)及磁場(chǎng)分布模型為出發(fā)點(diǎn),引出磁場(chǎng)流路徑切向的概念,并對(duì)探測(cè)儀數(shù)學(xué)模型進(jìn)行探討,分析磁場(chǎng)流路徑切向的判定原理,通過(guò)兩次旋轉(zhuǎn),從而將三維空間問(wèn)題轉(zhuǎn)化在二維平面內(nèi)處理;然后,對(duì)探測(cè)儀結(jié)構(gòu)進(jìn)行設(shè)計(jì),為探測(cè)儀實(shí)物及功能的實(shí)現(xiàn)奠定基礎(chǔ)。(2)探測(cè)儀的系統(tǒng)構(gòu)建及功能模塊開(kāi)發(fā)。首先,從機(jī)械部分實(shí)體構(gòu)建與控制系統(tǒng)設(shè)計(jì)及實(shí)現(xiàn)兩方面闡述了磁場(chǎng)流路徑切向探測(cè)儀系統(tǒng)的總體構(gòu)成,并對(duì)工程實(shí)現(xiàn)相關(guān)開(kāi)發(fā)軟件進(jìn)行了簡(jiǎn)要介紹;然后,從探測(cè)儀基礎(chǔ)功能開(kāi)發(fā)與控制界面設(shè)計(jì)兩方面詳細(xì)介紹各功能模塊的設(shè)計(jì)與實(shí)現(xiàn)方法,為探測(cè)儀系統(tǒng)集成測(cè)試做準(zhǔn)備。(3)探測(cè)儀的系統(tǒng)集成測(cè)試。首先,采用旋鈕電位器輸出信號(hào)作為測(cè)試信號(hào),驗(yàn)證了在該信號(hào)激勵(lì)下的探測(cè)儀系統(tǒng)能夠?qū)崿F(xiàn)預(yù)期各項(xiàng)功能;然后在交流磁場(chǎng)環(huán)境中,開(kāi)展磁場(chǎng)流路徑切向探測(cè)儀的集成測(cè)試,驗(yàn)證了探測(cè)儀系統(tǒng)能夠?qū)崿F(xiàn)對(duì)磁場(chǎng)流路徑切向的指示,而且實(shí)現(xiàn)了調(diào)平、啟動(dòng)、存儲(chǔ)、復(fù)位、再現(xiàn)等各項(xiàng)功能,達(dá)到預(yù)期目的。
[Abstract]:During the normal production of the furnace, complex physical chemical reactions occur in the furnace. The strong electric current is introduced into the furnace through the electrode, and the electric extreme position affects the length of the electric arc, and then affects the furnace temperature and the chemical reaction speed in the furnace. So the electrode depth should be controlled in a certain range, not too deep or too shallow. Because the electrode current of the furnace is very strong, even if there is the metal shielding effect on the furnace wall, there must be magnetic field information reflecting the current magnitude and direction of the furnace outside the furnace. By obtaining the distribution of the magnetic field information, we can know the key parameters such as the electric extreme part, which can stabilize the furnace condition, improve the technology, reduce the energy consumption and reduce the accident in the production process of the furnace. It has important practical significance and broad engineering application prospect to improve economic benefit. In this paper, an alternating current path tangential detector is designed. The tangential direction of the magnetic field flow path is analyzed according to the magnetic field component measured during the two rotation of the probe. First, the probe rotates 180 degrees around the azimuth axis. The maximum position of the magnetic field component is detected in the process, and then the maximum magnetic field component position is detected again by rotating 180 degrees around the pitch axis. Finally, the tangential direction of the magnetic field flow path can be indicated by the indicating rod. The main work of this paper is as follows: (1) the working principle of the detector. Firstly, based on the structure of the furnace and the magnetic field distribution model, the concept of the tangential direction of the magnetic field flow path is introduced, and the mathematical model of the detector is discussed, and the principle of determining the tangential direction of the magnetic field flow path is analyzed. Then, the structure of the detector is designed to lay a foundation for the realization of the object and function of the detector. (2) the system construction and function module development of the detector. Firstly, the overall structure of the magnetic field flow path tangential detector system is described from the aspects of the design and implementation of the mechanical part entity construction and control system, and the relative development software of the engineering realization is briefly introduced. This paper introduces the design and implementation method of each function module from two aspects of the basic function development and the control interface design of the detector in order to prepare for the integrated testing of the detector system. (3) the system integration test of the detector. Firstly, the output signal of the knob potentiometer is used as the test signal, which verifies that the detector system under the excitation of the signal can achieve the expected functions, and then, in the alternating magnetic field environment, the integrated test of the magnetic field flow path tangential detector is carried out. It is verified that the detector system can indicate the tangential direction of the magnetic field flow path, and realize the functions of leveling, starting, storing, reset and reproducing, so as to achieve the desired purpose.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TF33

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