Tool for fixing opening of diaphragm type regulating valve

Abstract

The invention relates to a tool for fixing opening of a diaphragm type regulating valve. The tool comprises a rectangular fixing plate A, two long-strip shaped fixing plates B, two U-shaped screw rodsand positioning nuts, wherein the U-shaped screw rods are formed through bending according to the diameter of an oil tube; threads are formed in the U-shaped screw rods and are matched with the positioning nuts; when the tool is used, the two U-shaped screw rods are mounted on the upper and lower sides of the diaphragm type regulating valve separately; two positioning nuts are arranged at one endof each of the U-shaped screw rods in a sleeving manner; the two fixing plates B are mounted on the U-shaped screw rod at the bottom of a valve handle; the fixing plate A is mounted on the U-shaped screw rod at the top of the valve handle; and the external part is fixed by the positioning nuts. With adoption of the tool, the flow rate of the oil inlet pipe of a main pump does not change or has abnormality, the opening is kept stable, and a pump unit stably operates for two reactor-year, so that safety of the main pump and a reactor is effectively ensured. The tool has reference significance for fixing a pressurized water reactor main pump lubricating oil valve.

Description

technical field [0001] The content of the invention belongs to the field of valve opening adjustment, and in particular relates to a tool for fixing the opening of a diaphragm-type regulating valve. Background technique [0002] Take the lubricating oil adjustment of the main pump of a nuclear power plant as an example. The nuclear main pump is regarded as the heart of the reactor, and its reliable operation has an obvious impact on the safety and economy of the nuclear power plant. Diaphragm valves are used for regulating valves in lubricating oil pipes of main pump motors. However, during the operation of the main pump motor, it was found that the valve stem of the valve was too flexible. After the valve opening was adjusted, the valve opening changed due to the vibration of the pump body and the erosion of the valve medium, which in turn affected the lubricating oil distribution of the pump unit bearings. Threats to the safe operation of equipment. During the operation ...

AI Technical Summary

Problems solved by technology

However, during the operation of the main pump motor, it was found that the valve stem of the valve was too flexible. After the valve opening was adjusted, the valve opening changed due to the vibration of the pump body and the erosion of the valve medium, which in turn affected the lubricating oil distribution of the pump unit bearings. Threat to safe operation of equipment

During the operation of the main pump, if the opening of the valve becomes smaller, the bearing will be insufficiently lubricated, and there is a risk of the bearing being burned due to oil shortage; amount, or even cause a fire, etc., the potential risk is extremely high

Images