According to the actual operation of the power station, the structural design of the valve stem should be further improved and perfected, the torsional moment that the valve stem can bear should be increased, and the appropriate manufacturing material for the valve stem should be selected. In addition to compliance with hardness related standards for selecting materials, the overall toughness and plasticity of the valve stem should be enhanced. In order to effectively prevent similar failures caused by fracture of the valve stem of the power station valve, the operation and maintenance personnel of the power station should test the hardness of the valve stem of the same production batch as the broken valve stem. Once a valve
stem that does not meet the requirements of the specified standards is found, it must be replaced in time to reduce the failure caused by breakage and of the valve stem of the power station valve
. At the same time, the power station should enhance the training on the operation of the valve, invite experts to give lectures, ensure that every staff member of the power station can accurately grasp the operation skills, gradually develop the habit of operating in strict accordance with the relevant specifications, standardize the operation behavior of employees, avoid the breaking of the valve stem due to human factors. Install torsion torque protection devices of valves, and enhance the protection of various operating parts of the power station to effectively prevent the breaking of the valve stem and other similar failures. The probability of failures caused by breaking of the valve stem of the power station can be effectively reduced, and also reduce the operation and maintenance cost and workload of the power station unit.
In order to improve the safety and stability of the operation of power station equipment, the overall structure and working environment of the power station valve stem were adjusted and improved from the two aspects, which are operation fatigue and stress concentration. Adjusting the overall performance of the power station unit and the material of the valve stem can effectively reduce the vibration of the valve stem during the operation of the power station equipment to a certain extent. The stress concentration part between the valve stem and the valve disc is adjusted to reduce the gap between the valve stem and the valve disc. Choose the material with better oxidation resistance, hardness, toughness and plasticity as much as possible, strengthen the inspection of the processing quality of the valve stem, ensure the smoothness of the valve stem surface, and avoid excessive concentration of the valve stem stress. Moreover, the particularity of the operation of the power station should be fully considered, so that the design, installation and disassembly of the valve stem of the power station meet the conditions and requirements of the operation of the power station. At the same time, anti-corrosion measures are taken for the valve stem, which is conducive to reducing the probability of failures caused by fracture of the valve stem, ensuring the safe and stable operation of various equipment in the power station. When selecting the valve stem, it is necessary to clarify the index requirements of various parameters such as metal composition, hardness and tensile strength so as to maximize the safe operation standard of the power station and meet the demand for residential electricity.
Through the analysis and research on the reasons for the breaking of the valve stem of the power station, it is found that the reasons for the breaking of the valve stem include the poor bearing capacity and the substandard quality of the valve stem material. In order to prevent the occurrence of a series of failures such as breakage of the valve stem of the power station, the operation and maintenance personnel of the power station should test the hardness of the valve stem. Once the hardness of the valve stem doesn't meet the requirement of the specified standard, the valve stem should be replaced in time, and the operation and maintenance of the relevant personnel of the power station should be strengthened to effectively reduce the probability of failures caused by breakage of valve stems in power stations.