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Measuring test and control method of internal depressurization flow characteristics of labyrinth disc pressure reducing valve

A technology of measurement testing and flow characteristics, which is applied in the direction of valve devices, engine components, mechanical equipment, etc., can solve the problems of adjustment lag, low control accuracy, and lack of quantitative measurement and testing methods for flow characteristics of step-down, achieving high accuracy, Practical effect

Active Publication Date: 2022-03-25
ZHEJIANG SCI-TECH UNIV +1
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  • Claims
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AI Technical Summary

Problems solved by technology

However, the existing research is mainly based on numerical simulation, and there is a lack of accurate quantitative measurement and testing methods for the pressure-reducing flow characteristics in the flow channel of the labyrinth valve spool. The control accuracy of the labyrinth valve based on numerical simulation is not high, and the regulation lags behind. The problem

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  • Measuring test and control method of internal depressurization flow characteristics of labyrinth disc pressure reducing valve
  • Measuring test and control method of internal depressurization flow characteristics of labyrinth disc pressure reducing valve
  • Measuring test and control method of internal depressurization flow characteristics of labyrinth disc pressure reducing valve

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0047] like figure 1 , figure 2 As shown, the specific implementation of the labyrinth disc pressure reducing valve includes a valve body 1, a valve seat 2, a labyrinth disc sleeve 3, a valve cover 7, a valve stem 13, a valve core 18, a throttle orifice 19 and a valve stem position regulator 21. A circular opening is set on the top of the valve body 1, and a valve cover 7 is installed in the circular opening. A central through hole is opened in the vertical direction inside the valve cover 7. An upper cavity and a lower cavity are provided inside the valve body. There is a horizontal medium inlet 22 and a medium outlet 23 at the side end, the medium inlet 22 communicates with the upper cavity of the valve body 1, and the medium outlet 23 communicates with the lower cavity of the valve body 1; The hole is connected, and the valve seat 2 is installed a...

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Abstract

The invention discloses a method for measuring, testing and controlling the pressure-reducing flow characteristics inside a labyrinth disc pressure-reducing valve. Build a circulating pipeline circuit, install a labyrinth disc pressure reducing valve, flush and pressurize; divide into multiple sub-flow channels, take the longitudinal section and install pressure strain gauges and flow meters; detect the pressure value and flow velocity value, and then calculate the harmonic average value; draw the discrete curve of the harmonic mean at different sections with the change of inlet pressure, draw the energy dissipation map corresponding to different inlet pressure, interpolate and determine the critical energy dissipation value; adjust the valve opening and adjust the labyrinth disc sleeve The energy dissipation map is obtained by the number of layers of the maze disc; the real-time energy dissipation value is obtained in the dynamic test and compared with the critical energy dissipation value for control. The invention can self-adaptively adjust the test and test, optimize the control of the operation, and realize the self-relieving of the critical characteristics of the cavitation / erosion failure of the labyrinth disc pressure reducing valve in a complex service environment, and the quantitative measurement test method has high precision.

Description

technical field [0001] The invention relates to a metering test and control method in a fluid valve, in particular to a metering test and control method for pressure-reducing flow characteristics inside a labyrinth disc pressure reducing valve. Background technique [0002] The regulating valve plays a role in regulating the pressure and flow of the medium in the process of material transportation in the process industry. It is a key component in the modern process industry to ensure the normal operation of various reaction equipment, cold exchange equipment, and fractionation equipment. In the process of adjusting the high pressure difference of the existing control valve, the medium is easy to cavitate and cause cavitation (cavitation erosion). The effect will cause great harm to the safe and stable operation of the spool. Relatively speaking, compared with other valves, the labyrinth control valve has the characteristics of high pressure drop and high flow rate. The laby...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K37/00
CPCF16K37/0091
Inventor 金浩哲段奥强王超明友王渭陈凤官
Owner ZHEJIANG SCI-TECH UNIV
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