開(kāi)關(guān)限位調(diào)整不到位，便是導(dǎo)致管道閥門泄漏的主要原因之一。且對(duì)閥門內(nèi)漏問(wèn)題進(jìn)行檢查的一步便是對(duì)開(kāi)關(guān)進(jìn)行檢查，看閥門開(kāi)關(guān)是否全關(guān)到位。當(dāng)前管道中的閥門在全關(guān)時(shí)，閥門的閥球與閥體之間僅需相差2°～3°，便會(huì)導(dǎo)致介質(zhì)泄漏產(chǎn)生。而由于一般的旋塞閥閥門都有縮徑，因此，關(guān)閉鍵與閥體間需要相差10°～15°才會(huì)出現(xiàn)內(nèi)漏現(xiàn)象，且一般導(dǎo)致閥門開(kāi)關(guān)限位不到位的主要情況有以下幾種：一，閥門在生產(chǎn)工廠內(nèi)安裝或者是在運(yùn)輸、裝卸環(huán)節(jié)，導(dǎo)致閥門的鏈接附件與閥門驅(qū)動(dòng)裝置配角出現(xiàn)錯(cuò)位，從而導(dǎo)致限位偏差，進(jìn)而在使用時(shí)出現(xiàn)內(nèi)漏情況。二，且對(duì)于裝配有閥門限位塊的球閥、埋地閥門，由于有加長(zhǎng)閥桿，閥門會(huì)隨著使用時(shí)期的增長(zhǎng)，導(dǎo)致閥門內(nèi)氧化鐵銹以及其他雜物落入閥門下，便容易在閥桿與限位塊間堆積灰塵等物體，一旦形成一定的體積，便會(huì)導(dǎo)致閥門無(wú)法全關(guān)到位，進(jìn)而形成閥門內(nèi)漏。三，由于閥門長(zhǎng)時(shí)期未得到保養(yǎng)維護(hù)，從而導(dǎo)致閥門齒輪箱內(nèi)的潤(rùn)滑膠變硬或齒輪氧化導(dǎo)致鐵銹堆積以及縣委螺栓松動(dòng)等諸多因素，從而導(dǎo)致閥門限位出現(xiàn)偏差，進(jìn)而出現(xiàn)閥門內(nèi)漏現(xiàn)象[1]。
The switch limit adjustment is not in place, which is one of the main causes of pipeline valve leakage. The next step to check the internal leakage of the valve is to check the switch to see whether the valve switch is fully closed. When the valve in the current pipeline is fully closed, the difference between the valve ball and the valve body is only 2 ° ~ 3 °, which will lead to medium leakage. As general plug valves have diameter reduction, internal leakage will occur only when the closing key and valve body have a difference of 10 ° ~ 15 °, and the main conditions that generally lead to the valve switch limit not in place are as follows: first, the valve is installed in the production plant or in the transportation, loading and unloading links, resulting in the misalignment of the angle between the valve's connecting accessories and the valve driving device, resulting in the limit deviation, Thus, internal leakage occurs during use. 2、 In addition, for ball valves and buried valves equipped with valve limit blocks, due to the extended valve stem, the valve will cause oxidation rust and other sundries in the valve to fall under the valve with the growth of service life, and it is easy to accumulate dust and other objects between the valve stem and the limit block. Once a certain volume is formed, the valve will not be fully closed in place, thus forming internal leakage of the valve. 3、 As the valve has not been maintained for a long time, many factors, such as the hardening of lubricating glue in the valve gearbox or the oxidation of the gear, the accumulation of rust and the loosening of bolts of the county committee, have led to the deviation of the valve limit and the internal leakage of the valve [1].
2.2閥門內(nèi)部雜質(zhì)較多
2.2 there are many impurities inside the valve
對(duì)于閥門內(nèi)漏來(lái)說(shuō)，其主要的一個(gè)原因就是內(nèi)部的雜質(zhì)較多，這些雜質(zhì)可以是石頭、鐵銹、焊渣等。一，閥門在制造初期，試驗(yàn)階段時(shí)沒(méi)有把內(nèi)部的水分完全排干，或排干后沒(méi)有采取干燥、防腐、潤(rùn)滑脂等保護(hù)措施，造成閥門內(nèi)部腐蝕和內(nèi)部泄漏；二，閥門在施工前，安裝的時(shí)候沒(méi)有很好的保護(hù)好兩邊的閥門，使得多余的雨水、石塊、泥漿等浸入翻門內(nèi)部，導(dǎo)致閥體與密封圈之間由于存在雜質(zhì)而變得不夠緊湊，導(dǎo)致閥門底座出現(xiàn)彈簧槽或者是發(fā)生“O”形變化，進(jìn)而導(dǎo)致內(nèi)漏現(xiàn)象發(fā)生；三，施工環(huán)節(jié)中安全系數(shù)不夠，施工細(xì)節(jié)做得不夠到位，使得施工現(xiàn)場(chǎng)出現(xiàn)的雜物、器具等進(jìn)入到內(nèi)部，使得閥門由于密封性不夠好而發(fā)生內(nèi)漏現(xiàn)象；四，閥門相關(guān)的動(dòng)作頻率大，使得多余的雜質(zhì)與污泥堆積在閥門的密封層，導(dǎo)致堆積、硬墊等現(xiàn)象的發(fā)生，這種現(xiàn)象一旦產(chǎn)生，閥門就會(huì)無(wú)法正常關(guān)閉，使得內(nèi)部發(fā)生泄漏等。
For the valve internal leakage, the main reason is that there are many internal impurities, which can be stone, rust, welding slag, etc. 1、 At the initial stage of manufacture, the internal water of the valve was not completely drained during the test phase, or the drying, anti-corrosion, grease and other protective measures were not taken after draining, resulting in internal corrosion and internal leakage of the valve; 2、 Before the construction of the valve, the valves on both sides were not well protected during installation, so that the excess rainwater, stones, mud, etc. were immersed into the inside of the flap door, resulting in insufficient compactness between the valve body and the sealing ring due to the presence of impurities, resulting in the spring groove or "O" shape change of the valve base, which led to internal leakage; 3、 The safety factor in the construction process is not enough, and the construction details are not done in place, which makes the sundries and appliances on the construction site enter into the interior, and makes the valve leak due to poor sealing; 4、 The high frequency of valve related actions causes excess impurities and sludge to accumulate on the sealing layer of the valve, resulting in accumulation, hard pad and other phenomena. Once this phenomenon occurs, the valve will not be able to close normally, resulting in internal leakage.
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