Failures and Maintenance of Valves in Gas Transmission Stations

Failures and Maintenance of Valves in Gas Transmission Stations


Abstract: The valve plays a very important role in the gas transmission station. According to different conditions and environments, the valve also plays different roles in the actual use process. Therefore, strengthening the maintenance and management of the valve is important for promoting the gas transmission station. Therefore, strengthening research on the maintenance and management of valves is of great value to promote the efficient operation of gas transmission stations. In the actual use process of the valve, situations such as the inability to be closed well and poor sealing will seriously affect the safe operation of the gas transmission station. Therefore, it is very necessary to strengthen the inspection of the safety of the valve in the gas transmission station.
 
The quality of the valve will affect the safe operation and efficiency of the gas transmission station. In the process of using the valve, the maintenance and management of the valve should be strengthened; the inspection and research of the valve should be strengthened and increase its service life and strength in the actual process, similar to the anti-oxidation provided in the research and production of the valve to reduce the final property economic loss caused by the valve quality in the actual production process.
 
1. Failures of valves in gas transmission stations
1.1 Process of gas transmission station valves
There are relatively many types of main process valves in the gas transmission field, and they also perform different tasks in the actual application. The process valves mainly include ball valves, gate valves and other valves. In the selection of valves for the gas transmission field, the corresponding working technicians should choose a more reasonable solution according to the actual fluid so as to ensure that the liquid in the pipeline can be closed and opened according to the needs. In general, the ball valve is the main type, and the corresponding staff only needs to rotate the corresponding valve by 90 degrees or a smaller rotation angle in the process of use to complete the control of the inside of the sphere.
 
1.2 The analysis of typical failures of valves in gas transmission stations
Corresponding failures during the use of the ball valve will directly affect the use of the ball valve and affect the liquid control inside the pipeline. The reasons for the failure of the ball valve are relatively diverse, but mainly include temporary internal leakages, false leakages and actual internal leakages. Temporary internal leakage is caused by the change between the internal pressure of the medium and the ambient temperature. False leakage is also very common, mainly because there is a certain deviation in the setting position of the ball valve. The actual internal leakage is mainly because the spherical surface has been scratched, so that the liquid inside the pipeline cannot be well controlled by the corresponding ball valve. For false leakages, the original valve should be slightly adjusted to ensure that the position of the valve is in a normal state and will not affect the internal liquid. The valve should be cleaned accordingly, and the second observation should be carried out between 24 hours and 48 hours. When dealing with internal leakages of valves caused by scratches, open the discharge nozzle at the state of the valve being fully closed. In this case, a large pressure difference is formed in the valve cavity, and the corresponding sealing material can be injected, which can solve the leakage in a short time.
 
2. Maintenance of conventional valves
A valve is a relatively common mechanical component, which plays a very important role in the production and use process. Different valves have different functions in different instruments, so there are also some problems in the maintenance and management of valves. In the maintenance process of the valve, the appearance of the valve should first be cleaned to a certain extent due to the big difference, so that the overall appearance of the valve can maintain clean and there will be better flexible operation in the subsequent use process. In addition, sealing is also a key indicator to measure the quality of use of valves. In the actual maintenance and management process, the corresponding maintenance and management methods are used for the corresponding parts to increase their durability and performance in the actual use process.
 
2.1 Cleaning of valves
The cleaning of the valve should be a basic link for different types of valves. In the cleaning process of the valve, the dust and oil on parts such as turbines, gears and worms should be cleaned in time. In the cleaning process, the corresponding parts should be thoroughly cleaned. If the cleaning process is not carried out well, the corresponding dust and oil will accumulate, resulting in more serious dust and oil. In addition, the impact on the use process is very fatal and critical. For the oil stains and media that are relatively difficult to clean on the valve, a high-temperature steam device should be used for corresponding purging. For the dust and oil stains that are difficult to clean, copper wire should be used for corresponding cleaning. The cleaned parts should have the same gloss and color as the original parts.
 
2.2 Lubrication of valve parts
The lubrication of the valve is to ensure that the valve has good operability and convenience during use of the valve. The valve is relatively complex in terms of components and is formed by corresponding bearing parts, gears and worms. The normal operation of these parts should be based on better lubrication. The function of lubrication is to reduce the friction between the corresponding meshing or other combined parts, so that the corresponding parts can have a long service life and high strength in the process of use. Better lubrication also provides convenience for the operator of the valve. The control staff can accurately control the gas delivery according to the corresponding rotation angle. In addition, the frequency of lubrication and cleaning should be strengthened for the parts with relatively frequent use to ensure that they can play a better role in actual use, so that the valve can have better performance in operation. For components exposed to the outside, the long-term exposure to the external working environment will bring relatively greater pressure to the subsequent cleaning and operating state due to the good adhesion of grease. Therefore, molybdenum dioxide and graphite are generally used for the corresponding lubrication of similar parts. This lubrication method can satisfy the lubrication of the valve without causing a great impact on the corresponding parts.
 
2.3 Integrity of valves
The valve is composed of corresponding parts. It is necessary to consider integrity in the maintenance of the valve. For example, proper orientation should be ensured during the use of the packing gland and a certain gap should be preserved. Some valves are exposed to the open air and are easily affected by the weather. In order to prevent them from being affected by wind, snow and other natural factors, they should be protected with a protective cover. In addition, the scale on the valve should be complete, accurate and clear. Ensure that the matching caps and other accessories of the valve are in good conditions and complete in variety.