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.

阀门的使用过程中比较容易出现的问题是强度和密封失效，这就必然会造成能源资源的浪费，也会容易发生安 全问题。阀门的结构密封改进的工作是提高阀门应用质量的关键工作，从理论层面深化研究就能有助于实际阀门密封结构的改进操作。

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、阀门密封结构的影响因素分析

1. Analysis on Influencing Factors of valve sealing structure

阀门的密封程度是需要结合其类型和性质相结合确定的，阀门的密封程度也和阀门材料以及设备工装和工艺等因素有着直接的关系，任何环节出现了质量问题，就必然会影响阀门的应用质量。结合科学设计标准，密封结构要设计成圆锥体或者是球体，但是和平面密封结构比较来说，这一密封结构就会存在诸多的不利影响，密封面容易出现擦伤，以及造成维修加工存在诸多的难度，这样也比较容易增加生产成本等，市场销售也会产生很大影响。

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.

阀门密封面设计为圆锥或者是圆球体，会有不利因素影响，采取平面密封设计，将阀杆以及阀盖密封面由原来圆锥形状便成为平面接触样式，这样的方式受限比较小，装置和设备精度能得到保障，加工也相对比较容易一些。阀门使用时间长短和阀门开关次数呈现出正比，维修方面也比较容易。

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、阀门密封结构的应用要点

2. Application points of valve sealing structure

阀门密封结构的应用当中，要注重从几个方面加强重视，不能让阀门在开度比较小状况下工作，阀针的启动相对比较缓慢。所以开度小的时候节流间隔就相对比较小，还要能够适当的扩大锁紧机构螺距，加大阀针的开启速度以及升程，工作的开度会进一步加大，能有用延长阀门使用周期。

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.

阀门密封结构的实际应用当中，介质温度对于阀门的使用周期比较容易产生影响，过高介质温度比较容易缩短阀门使用期限，在具体的使用过程中，就要尽量不适用阀门在高温介质下工作，卸压阀增加冷 却装置，这样能有用延长阀门使用周期。要避免有杂质进入其中，这样会影响针阀的使用寿命。

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，需要定期的清洁以及过滤高压介质，加液体需要采用过滤器实施过滤，使用次数多要适当缩短使用的周期，做好油箱的清理工作等，只有从这些方面得到了充分重视，才能保障阀门密封结构的应用质量。

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.