As the main control component of the fluid transportation system in the petrochemical industry, the sealing performance of the valve will have a great impact on the energy saving effect of the whole system. It is more important to improve the sealing structure of the valve. Based on this, this paper first expounds the influencing factors and application points of the valve sealing structure, and then explores the improvement measures and effects of the valve sealing structure, hoping to deepen the exploration from the theoretical level and provide some enlightenment for the actual work.

閥門的使用過程中比較容易出現(xiàn)的問題是強度和密封失效，這就必然會造成能源資源的浪費，也會容易發(fā)生安 全問題。閥門的結(jié)構(gòu)密封改進的工作是提高閥門應(yīng)用質(zhì)量的關(guān)鍵工作，從理論層面深化研究就能有助于實際閥門密封結(jié)構(gòu)的改進操作。

During the use of the valve, the problems that are easy to occur are strength and seal failure, which will inevitably lead to a waste of energy resources and safety problems. The improvement of valve sealing structure is the key work to improve the application quality of valve. Deepening the research from the theoretical level can contribute to the improvement of actual valve sealing structure.

1、閥門密封結(jié)構(gòu)的影響因素分析

1. Analysis on Influencing Factors of valve sealing structure

閥門的密封程度是需要結(jié)合其類型和性質(zhì)相結(jié)合確定的，閥門的密封程度也和閥門材料以及設(shè)備工裝和工藝等因素有著直接的關(guān)系，任何環(huán)節(jié)出現(xiàn)了質(zhì)量問題，就必然會影響閥門的應(yīng)用質(zhì)量。結(jié)合科學(xué)設(shè)計標(biāo)準(zhǔn)，密封結(jié)構(gòu)要設(shè)計成圓錐體或者是球體，但是和平面密封結(jié)構(gòu)比較來說，這一密封結(jié)構(gòu)就會存在諸多的不利影響，密封面容易出現(xiàn)擦傷，以及造成維修加工存在諸多的難度，這樣也比較容易增加生產(chǎn)成本等，市場銷售也會產(chǎn)生很大影響。

The sealing degree of the valve needs to be determined in combination with its type and nature. The sealing degree of the valve is also directly related to valve materials, equipment, tooling and technology. Any quality problem in any link will inevitably affect the application quality of the valve. Combined with the scientific design standard, the sealing structure should be designed as a cone or sphere. However, compared with the plane sealing structure, this sealing structure will have many adverse effects. The sealing surface is easy to be scratched, and there are many difficulties in maintenance and processing. In this way, it is easy to increase the production cost, and the market sales will also have a great impact.

閥門密封面設(shè)計為圓錐或者是圓球體，會有不利因素影響，采取平面密封設(shè)計，將閥桿以及閥蓋密封面由原來圓錐形狀便成為平面接觸樣式，這樣的方式受限比較小，裝置和設(shè)備精度能得到保障，加工也相對比較容易一些。閥門使用時間長短和閥門開關(guān)次數(shù)呈現(xiàn)出正比，維修方面也比較容易。

The sealing surface of the valve is designed as a cone or a circular sphere, which will be affected by adverse factors. The plane sealing design is adopted to change the sealing surface of the valve stem and valve cover from the original cone shape into a plane contact style. In this way, the restriction is relatively small, the accuracy of the device and equipment can be guaranteed, and the processing is relatively easy. The service time of the valve is directly proportional to the number of valve switches, and the maintenance is also relatively easy.

2、閥門密封結(jié)構(gòu)的應(yīng)用要點

2. Application points of valve sealing structure

閥門密封結(jié)構(gòu)的應(yīng)用當(dāng)中，要注重從幾個方面加強重視，不能讓閥門在開度比較小狀況下工作，閥針的啟動相對比較緩慢。所以開度小的時候節(jié)流間隔就相對比較小，還要能夠適當(dāng)?shù)臄U大鎖緊機構(gòu)螺距，加大閥針的開啟速度以及升程，工作的開度會進一步加大，能有用延長閥門使用周期。

In the application of valve sealing structure, attention should be paid to several aspects. The valve can not work when the opening is relatively small, and the start of valve needle is relatively slow. Therefore, when the opening is small, the throttling interval is relatively small. It is also necessary to appropriately expand the pitch of the locking mechanism, increase the opening speed and lift of the valve needle, and the working opening will be further increased, which can effectively prolong the service life of the valve.

閥門密封結(jié)構(gòu)的實際應(yīng)用當(dāng)中，介質(zhì)溫度對于閥門的使用周期比較容易產(chǎn)生影響，過高介質(zhì)溫度比較容易縮短閥門使用期限，在具體的使用過程中，就要盡量不適用閥門在高溫介質(zhì)下工作，卸壓閥增加冷 卻裝置，這樣能有用延長閥門使用周期。要避免有雜質(zhì)進入其中，這樣會影響針閥的使用壽命。

In the practical application of the valve sealing structure, the medium temperature is easy to have an impact on the service life of the valve. If the medium temperature is too high, it is easy to shorten the service life of the valve. In the specific use process, it is necessary to try not to apply the valve to work under the high-temperature medium. The pressure relief valve adds a cooling device, which can effectively prolong the service life of the valve. Impurities should be avoided, which will affect the service life of the needle valve.

除此之外，需要定期的清潔以及過濾高壓介質(zhì)，加液體需要采用過濾器實施過濾，使用次數(shù)多要適當(dāng)縮短使用的周期，做好油箱的清理工作等，只有從這些方面得到了充分重視，才能保障閥門密封結(jié)構(gòu)的應(yīng)用質(zhì)量。

In addition, regular cleaning and filtration of high-pressure media are required, and filters are required for liquid addition. Due to many times of use, it is necessary to appropriately shorten the service cycle and clean the oil tank. Only when full attention is paid to these aspects can the application quality of valve sealing structure be guaranteed.