空壓機調(diào)節(jié)閥出現(xiàn)的幾種故障及解決方式

一、液位控制調(diào)節(jié)閥失控打不開

1、 The liquid level control valve is out of control and cannot be opened

液位測量指示已很高，調(diào)節(jié)器輸出也很大，但是調(diào)節(jié)閥還開不了，只好打機械手輪控制。檢查閥門定位器（拆去膜頭連接管，堵上），撳動噴嘴檔板機構(gòu)，定位器無輸出變化，檢查節(jié)流孔是通暢的，拆開放大器發(fā)現(xiàn)放大器膜片破了。更換膜片，調(diào)節(jié)閥重投入自動控制。閥門定位器放大器膜片破，背壓室無背壓，放大器無輸出，故調(diào)節(jié)閥失控。

The liquid level measurement indication is very high, and the output of the regulator is also very large, but the regulating valve can not be opened, so it has to be controlled by the mechanical hand wheel. Check the valve positioner (remove the membrane head connecting pipe and plug it), press the nozzle baffle mechanism, the positioner has no output change, check the orifice is unobstructed, open the amplifier and find that the amplifier diaphragm is broken. Replace the diaphragm and put the control valve into automatic control again. The diaphragm of the valve positioner amplifier is broken, the back pressure chamber has no back pressure, and the amplifier has no output, so the control valve is out of control.

二、閥門定位器反饋滑桿銹死

2、 Valve positioner feedback sliding rod rusted

液位波動厲害，檢查發(fā)現(xiàn)閥門定位器反饋機構(gòu)滑桿已

The liquid level fluctuated greatly. It was found that the sliding rod of feedback mechanism of valve positioner had been damaged

山東空壓機

全銹死不能轉(zhuǎn)動，只好用手輪控制。設(shè)法敲出滑桿，打銹并加油后裝回，調(diào)節(jié)閥復(fù)回正常。閥門定位器反饋機構(gòu)，隨閥的開度大小變化而加進定位器相應(yīng)的反饋量。滑桿銹死，反饋作用力不能隨閥的開度大小而變化，而不能使閥的開度停在調(diào)節(jié)器輸出信號相應(yīng)位置上，致使液位波動不已。

It's completely rusted and can't be turned, so it has to be controlled by hand wheel. Try to knock out the sliding rod, rust and refuel it, and then install it back to normal. The feedback mechanism of valve positioner adds the corresponding feedback of positioner with the change of valve opening. The sliding rod is rusted, the feedback force can not change with the valve opening, and the valve opening can not stop at the corresponding position of the output signal of the regulator, so that the liquid level fluctuates constantly.

三、壓力控制閥不能動作

3、 Pressure control valve does not work

一次工藝減負(fù)荷，天然氣量減不下來，是天然氣壓力調(diào)節(jié)閥門不能動作所致。檢查中發(fā)現(xiàn)到閥門的輸出信號正常，估計是閥芯才結(jié)碳卡死，后加大氣動信號，再加手輪作用力才關(guān)了此閥。待停車拆開閥門檢查，不出所料，因該閥平時負(fù)荷穩(wěn)定開關(guān)甚少，天然氣中所帶的碳黑在閥桿和導(dǎo)向套之間的很小間隙中結(jié)碳卡死。故以后每年大檢修時，均將此閥拆開清洗，以免類似事故。

Once the process load is reduced, the natural gas volume can not be reduced, which is caused by the failure of the natural gas pressure regulating valve. During the inspection, it was found that the output signal of the valve was normal. It was estimated that the valve core was stuck with carbon. After that, the atmospheric dynamic signal was added, and then the handwheel force was added to close the valve. When the valve was shut down, it was disassembled for inspection. As expected, the load of the valve was stable at ordinary times, and there were few switches, the carbon black in the natural gas was stuck in the small gap between the valve stem and the guide sleeve. Therefore, the valve will be disassembled and cleaned every year to avoid similar accidents.

四、閥芯斷失控

4、 The valve core is broken and out of control

吸收塔液位控制不住，記錄曲線波動下降，檢查變送器、調(diào)節(jié)器均無問題。打手輪控制時發(fā)現(xiàn)手輪壓下或提起時均不像平時那么沉重，輕飄飄的，判斷是閥芯斷裂，被迫停車拆開調(diào)節(jié)閥處理，是閥芯和閥桿連接處斷開。只好更換閥芯，并將閥芯閥桿連接處堆焊一圈增加強度，以免類似事故。閥芯斷裂是在介質(zhì)壓力下的不平衡力所致。

The liquid level of absorption tower could not be controlled, the fluctuation of recording curve decreased, and the transmitter and regulator were checked. When the handwheel was pressed or lifted, it was found that the handwheel was not as heavy and floating as usual. It was judged that the valve core was broken, and it was forced to shut down and open the control valve for treatment. The connection between the valve core and the valve stem was broken. We have to replace the valve core, and weld the valve core and stem joint for a circle to increase the strength, so as to avoid similar accidents. The valve core fracture is caused by the unbalanced force under the medium pressure.

以上內(nèi)容是山東空壓機的小編為大家整理的關(guān)于故障的問題解決的方案，希望可以幫助大家，如需要更多的精彩內(nèi)容請大家：http://xingchangweb.com會呈現(xiàn)更多的精彩內(nèi)容。

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