【正文】 是對自己綜合知識、能力的挑戰(zhàn)。從剛開始設(shè)計時的蒙頭蒼蠅到如今的靈活運(yùn)用。在設(shè)計期間我鍛煉了很多，也收獲了很多！首先，通過液 化石油氣儲罐的設(shè)計，我全面綜合的了解了液化石油氣的組成成分和各參數(shù)的確定。其次，通過大量相關(guān)資料和書籍的參考，我對液化石油氣儲罐的設(shè)計過程有了初步的了解。著手開始設(shè)計的那段時間確實比較痛苦，感覺無從下手。正所謂萬事開頭難，通過與同學(xué)們的討論，我找到了一種絕處逢生的感覺，有了頭緒和思路之后設(shè)計就顯得水到渠成了。 不管是筒體、封頭、鞍座、法蘭、接管還是螺栓螺柱，每一種結(jié)構(gòu)的設(shè)計都需要有相關(guān)工具書作指導(dǎo)和標(biāo)準(zhǔn)的參考，設(shè)計起來的工作量很大。不過我在設(shè)計過程中也找了很多快樂，和大家討論時的積極勁兒，這讓我設(shè)計起來非常 有動力。我按著設(shè)計的時間安排一步一步的完成設(shè)計。到畫草圖和 CAD 制圖時我們又迎來了新的挑戰(zhàn)，這次 CAD 的制圖，讓我們的 CAD 制圖技術(shù)得到了很大提高?？傊?，這次的設(shè)計讓我們收獲的不只是知識，同時也是各種能力的提升與鍛煉。 13 總結(jié) 第 31 頁 （共 32 頁） 參考文獻(xiàn) [1] 國家質(zhì)量技術(shù)監(jiān)督局 .GB150《鋼制壓力容器》，中國標(biāo)準(zhǔn)出版社， 2021 [2] 國家質(zhì)量技術(shù)監(jiān)督局 .《壓力容器安全技術(shù)監(jiān)察規(guī)程》，中國勞動社會保障出版社， 1999 [3] 國家經(jīng)濟(jì)貿(mào)易委員會 .中華人民共和國行業(yè)標(biāo)準(zhǔn) JB/T 47362021《鋼制壓力容器用封頭》 .昆明：云南科技出版社， 2021 [4] 國家經(jīng)濟(jì)貿(mào)易委員會 .中華人民共和國行業(yè)標(biāo)準(zhǔn) JB/T 47462021《補(bǔ)強(qiáng)圈》 .昆明：云南科技出版社， 2021 [5] 潘紅良，郝俊文．《過程設(shè)備機(jī)械設(shè)計》 [M]．上海：華東理工大學(xué)出版社， 2021 [6] 樊元三．《液化石油氣儲罐的設(shè)計要點(diǎn)及安全性論證》 [J]．煤氣與熱力， 1994， 14(4)： 2425 [7] 上海華蓬防爆科技有限公司．中國標(biāo)準(zhǔn)化 [J]． AQ 30012021 汽車加油（氣）站、輕質(zhì)燃油和液化石油氣汽車罐車用阻隔防爆儲罐技術(shù)技術(shù)要求（一） ， 2021 (10)： 7879 [8] 刑志祥 ,蔣軍成．天然氣工業(yè) [J]．《 16MnR鋼容器在高溫 (火災(zāi) )條件下的力學(xué)響應(yīng) 》， 2021，23(5)： 35 [9] 趙琦．化工設(shè)計 [J]．《 淺談大型低溫液化石油氣儲罐設(shè)計方案的選擇 》， 2021， 41(3)： 4344 [10]侯慶華，鐘書明 [J]. 油氣田地面工程 [J]． 液化石油氣儲罐設(shè)計中應(yīng)注意的幾個問題 ， 2021，25(12)： 35 [11]余國琮主編 .《化工機(jī)械工程手冊》 [M].北京， 2021上卷第 11篇 [12]鄭津洋 董其伍 桑芝富 主編 《過程設(shè)備設(shè)計》 [M].北京 ,2021 117~125 [13]賀匡國主編《化工容器及設(shè)備簡明設(shè)計手冊》 [M].北京， 2021 644~720 [14]曲文海編《壓力容器與化工設(shè)備實用用手冊》 [M].北京， 2021， 170~200 [15]中華人名共和國國家改革和發(fā)展委員會 .JB/T ~. 容器支座 [S].2021 [16]國家經(jīng)濟(jì)貿(mào)易委員會 .GB/T 47462021.《鋼制壓力容器用封頭》 .[S].2021 [17]陳國理主編 .《壓力容器及化工設(shè)備》 .第二版 .廣州：華南理工大學(xué)出版社， 1994 [18]丁伯明 ,蔡仁良編著 .《壓力容器設(shè)計 — 原理及工程應(yīng)用》 [M].北京：化學(xué)工業(yè)出版社， 1994 [19]中華人民共和國工業(yè)和信息化部 .HG/T20592~206352021.《鋼制管法蘭、墊片、緊固件》[S] [20]陳立亮 .《材料加工 CAD/CAE/CAM技術(shù)基礎(chǔ)》北京： 2021 [21]田貫三，馬一泰，王侃宏，郇中杰 .《液化石油氣降溫儲存的分析》 [R].天津大學(xué)， 2021 [22]于清，王一軍，許越新，楊烈武《大型儲罐設(shè)計技術(shù)的發(fā)展》 [N].新疆石油天然氣， 2021/12 第二卷第四期 [23]陳江凡，周華生《大型液化氣低溫儲罐結(jié)構(gòu)及保冷設(shè)計》 [N].油氣儲運(yùn)，第二十五卷第七期 [24]吳德榮主編《化工工藝設(shè)計手冊》第四版 .北京， 2021 [25]中華人民共和國發(fā)展和改革委員會 .JB/T4731~2021《鋼制臥式容器》 [S] 50 液化石油氣儲罐設(shè)計 第 32 頁 （共 32 頁） 致謝 設(shè)計過程中我遇到了很多困難也遇到了很多思想分歧，但通過大量資料的查詢和相關(guān)標(biāo)準(zhǔn)的參考我們都一一解決了。這鍛煉了我個人解決問題的能力，在有關(guān)經(jīng)驗型的知識上，如焊接接頭的選擇，開孔位置及補(bǔ)強(qiáng)等，指導(dǎo)老師給與了我很大幫助，再加上中途老師和老師在 CAD 制圖方面技術(shù)和技巧的指導(dǎo)、設(shè)計方面的答疑和幫助我們解決各種設(shè)計上的問題，這些對我們的設(shè)計都有很大的幫助！此外，幾位同學(xué)在文檔排版方面給與了我很大幫助，在此特向三位老師和同學(xué)表示衷心感謝！ 致謝 第 33 頁 （共 32 頁） 您好，為你提供 優(yōu)秀的畢業(yè)論文參考資料，請您刪除以下內(nèi)容， O(∩_∩)O謝謝?。?！A national survey was recently launched to evaluate the eye health of Chinese children andteenagers.On June 6, China39。s annual National Day for Eye Care, the China Youth Development ServiceCenter and Zhejiang Medicine, a leading listed Chinese pharmaceutical pany, jointlyannounced the kickoff of the about one month, a questionnaire piled by top eye care medical experts in China willbe distributed through multiple online partners, including , as well asthrough offline survey events held in universities, middle schools and primary schools acrossthe report will be released based on the survey statistics and analysis, and most importantly,guidelines for parents and youth on how to care for the eyes and prevent myopia — agrowing problem in China39。s digitized society, will also be attached on the report.Myopia is not only a disease that makes people see things blurrily, but also leads to severeplications, such as glaua (increased pressure within the eyeball), and can causeblindness, said Zhou Yuehua, an established eye care specialist with Beijing TongrenHospital.It is very important for parents and children to know about the risk and care for their eyes.There are about 450 million myopia patients in China. Among Chinese myopia patients,30million are severe patients, according to ZhouThe prevalence of myopia among high school and college students is more than 70 percent,and the situation is continuously worsening, he Zhu, director with the China Youth Development Service Center, said long hours ofstudy, lack of exercise, especially outdoor activities, and attachment to electronic screen aresome of the top reasons behind the widespread myopia problems, and the increase ofyounger patients, although China has made great progress in improving the hardwarefacilities and lighting conditions in said he hopes the survey will alert people on the threatening situation, and also helpmedical experts to better guideline parents and children39。s behaviors to care for eyes, basedon the timely and factual statistics the survey series of followup events will also be held in six cities, including Jinan in Shandongprovince, and Changsha in Hunan province, to educate people on how to care for eyes afterthe survey started. More and more Chinese are jogging to get and stay fit. Most joggers will run alone, but some will jog with friends or even coaches. The Beijing Olympic Forest Park is one of the most popular spots. It is packed with runners in the afternoon, usually after work, and at weekends. Jogging after a whole day39。s work can be a way to unwind. It is true for He Wenjun, whose workplace is right near the forest park. She discovered her athletic aptitude at the age of seven, when she began playing tennis. Then she turned to jogging, and she has persevered with it for 10 years. I e to jog almost every day after work, whenever I have time. I think jogging is good for my health. And for me, a girl, it helps me to achieve to eternal goal, to keep slim, He said. He says she prefers jogging alone, so she can focus better. She loves jogging, even during Beijing39。s smoggy days. If the smog is severe, I39。ll hold off jogging for a while. But if I really want to get away from work, I39。ll wear a mask, or just ignore the smog and go on jogging, she said. For those who are not so athletic, jogging also has its attractions. Wu Houbin started roughly two years ago, when he was severely obese. Within two months, his weight dropped from 82 kilograms to 64 kilograms. The success helped him recover health, and he has made friends. Jogging does not require speed, but stamina. If you want to stick to the game, you need to take