本文關(guān)鍵詞：天然氣管線全焊接鍛造球閥最大彎曲載荷研究　出處：《應(yīng)用基礎(chǔ)與工程科學(xué)學(xué)報》2017年04期 　論文類型：期刊論文

  更多相關(guān)文章： 天然氣管線球閥 最大彎曲載荷 強度 密封 修正系數(shù)

【摘要】：為保證天然氣長輸管線全焊接鍛造球閥在地基沉降、山體滑坡等實際可能工況下有足夠強度和良好密封性能,基于有力矩理論和彎曲應(yīng)力理論,從強度和密封角度對全焊接鍛造球閥可承受最大彎曲載荷進行理論分析計算和數(shù)值模擬實驗,得到全焊接鍛造球閥同時滿足強度與密封性能的最大彎曲載荷;通過分析理論載荷值與臨界載荷值得到修正系數(shù)C,求出全焊接鍛造球閥在任意公稱壓力和直徑下可承受最大彎曲載荷.研究表明:在保證強度有效的最大彎曲載荷下,球閥密封性能依然有效;修正系數(shù)的引入彌補了理論計算無法考慮結(jié)構(gòu)突變、應(yīng)力集中、幾何非線性等因素引起的不足;研究方法彌補了國內(nèi)無法進行全焊接鍛造球閥抗彎性能評估型式試驗的不足.
[Abstract]:In order to ensure that the fully welded forged ball valve of long distance natural gas pipeline has sufficient strength and good sealing performance under the actual working conditions such as foundation settlement and landslide, the theory of moment and bending stress is based on. From the angle of strength and seal, the maximum bending load of fully welded forged ball valve can be obtained by theoretical analysis and numerical simulation, and the maximum bending load of fully welded forged ball valve can meet both strength and sealing performance. By analyzing the theoretical load value and the critical load value to the correction coefficient C. The maximum bending load of the fully welded forged ball valve under any nominal pressure and diameter is obtained. The results show that the sealing performance of the ball valve is still effective under the maximum bending load which ensures the effective strength of the ball valve. The introduction of the correction coefficient makes up for the deficiency caused by the failure of theoretical calculation to consider structural catastrophe, stress concentration, geometric nonlinearity and so on. The research method makes up for the shortage of domestic type test for evaluating the bending resistance of fully welded forging ball valve.
【作者單位】： 蘭州理工大學(xué)石油化工學(xué)院;機械工業(yè)泵及特殊閥門工程研究中心;山東益都閥門集團股份有限公司;
【基金】：國家自然科學(xué)基金項目(51569012) 中國石油天然氣股份公司重大科技專項(2012E-2802) 甘肅省高�；緲I(yè)務(wù)費資助項目(20146302)
【分類號】：TE973.3
【正文快照】： 管線輸送作為石油天然氣主要運輸方式,需長期連續(xù)運行,且除要求承受內(nèi)部介質(zhì)壓力外,還需承受可能由于地基沉降、山體滑坡、洪水、地震等外部因素引起的外部載荷,這些因素對管線的壽命、密封性能等提出了更為嚴格的要求.具有高強度、高密封性、防火、防靜電等優(yōu)點的全焊接鍛造

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