Universal Valve is a Universal Valve with online monitoring and calibration functions. It is characterized by: an adjusting nut is fixed at the upper end boss of the upper valve body. There is a pressure rod inside the adjusting nut. The pressure rod has a flat structure at the upper end and a spherical structure at the lower end. The lower opening of the hollow-shaped pressure rod is in contact with the upper conical surface of the spring seat, and the Valve Stem is inserted into the cavity of the pressure rod.
The upper end of the pressure rod is provided with a force sensor or a fastening bolt; the upper boss surface of the upper valve body is provided with a locking nut for fastening the adjusting nut, and the upper end of the adjusting nut is also provided with a locking nut for fastening the fixed component; the upper end surface of the upper valve body There are at least two jackscrew holes for fixing the jackscrew. Realize online real-time or periodic monitoring of the spring force of the
Gate Valve, thereby indirectly monitoring the opening pressure of the Gate Valve; it is easy to operate and eliminates the need for offline inspection.
The safe discharge capacity of the Gate Valve, that is, the displacement, is one of the most important indicators for measuring the performance of the Gate Valve. Under the guidance of the patented technology of "Gate Valve with online function and its detection system", the displacement detection problem of the dynamic opening process of the Gate Valve and its related flow mechanism were studied.
The main research contents include: based on the flow characteristics of the nozzle and the basic fluid control equation of ideal gas isentropic flow, the calculation formula for the opening emission of the Gate Valve is derived, and the various factors affecting the opening and emission capacity of the Gate Valve are systematically summarized. The interaction mechanism between the flow field parameters of the Gate Valve overpressure opening is proposed, especially the changing rules of the gas dynamic parameters.
In terms of experimental research, the valve core detection sensor and the detection flange sensor were used to conduct displacement and other related parameter tests in field tests. Comparing the two-dimensional and three-dimensional numerical simulation displacement calculation values with the experimental test results, the study shows that the simulation and experimental results are relatively consistent, thus indicating that the use of special sensors to detect and measure displacement has good operability. As long as the numerical simulation method for calculating displacement is appropriate, the discharge capacity of the Gate Valve can be predicted more accurately.
