CN-122016295-A - Flow test device and system for regulating valve for measuring flow characteristics

CN122016295ACN 122016295 ACN122016295 ACN 122016295ACN-122016295-A

Abstract

The application relates to the technical field of flow tests, in particular to a regulating valve flow test device and a regulating valve flow test system for measuring flow characteristics, wherein the method is used for collecting flow data, temperature data and pressure data of different preset valve openings in the flow test process of the regulating valve; the method comprises the steps of determining a steady-state time interval of a preset valve opening, determining data comprehensive confidence coefficient of the collection time and an adjustment flow coefficient of the preset valve opening in the steady-state time interval, performing weighted curve fitting on all preset valve opening and adjustment flow coefficients according to the data comprehensive confidence coefficient and the valve opening steady-state coefficient, obtaining a characteristic curve of flow of a regulating valve, and completing a flow characteristic test of the regulating valve. According to the application, the characteristic curve of the flow of the regulating valve can be drawn according to the mass of the flow of the regulating valve, and the accuracy of the test result is ensured.

Inventors

HUANG ZHIBIN
HUANG ZHIPENG
HUANG HUALONG

Assignees

湖南佳一流体智控技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260413

Claims (10)

1. A regulating valve flow test system for measuring flow characteristics, the system comprising the following modules: The data acquisition module is used for acquiring flow data and temperature data of different preset valve openings in the flow test process of the regulating valve and pressure data of a valve inlet and a valve outlet; The steady state degree analysis module is used for analyzing the difference of the valve opening degrees at adjacent acquisition moments and determining the steady state degree of the valve opening degree at each acquisition moment and the steady state time interval of each preset valve opening degree, wherein the steady state degree of the valve opening degree is used for representing the steady state degree of the valve opening degree, and the steady state time interval is the time interval of the valve opening degree stabilization under the preset valve opening degree; The flow coefficient adjustment determination module is used for analyzing the difference of adjacent acquisition moments of different kinds of data in steady-state time intervals in all kinds of data, respectively determining the data comprehensive confidence coefficient of each acquisition moment, wherein the data comprehensive confidence coefficient is used for representing the accuracy of the data acquired at the acquisition moment, and determining the flow coefficient adjustment of the preset valve opening in the steady-state time intervals by combining the flow coefficient of the steady-state time intervals of the preset valve opening, and the flow coefficient adjustment is used for representing the circulation capacity of the regulating valve in the preset valve opening; And the flow characteristic test module is used for carrying out weighted curve fitting on all preset valve opening and adjustment flow coefficients according to the data comprehensive confidence and the valve opening stability at all acquisition moments in the steady-state time interval to obtain a characteristic curve of the flow of the regulating valve and finish the flow characteristic test of the regulating valve.
2. The flow test system of a regulating valve for measuring flow characteristics according to claim 1, wherein the method for acquiring the valve opening stability at the acquisition time is as follows: and marking any one of the acquisition time as a target acquisition time, marking all the acquisition time within a first preset time length after the target acquisition time as comparison acquisition time, wherein the valve opening stability of the target acquisition time and the difference of the valve opening of all adjacent comparison acquisition time are in a negative correlation.
3. The regulating valve flow test system for measuring flow characteristics according to claim 1, wherein the method for acquiring the steady-state time interval of the preset valve opening is as follows: taking the first acquisition time when the valve opening reaches the same preset valve opening as the initial acquisition time of the same preset valve opening, and establishing a time window with the time length being the second preset time length by taking the initial acquisition time as the center; And establishing a steady-state time interval of the same preset valve opening according to the acquisition time with the maximum valve opening steady-state degree in the time window and the ending time of the time window.
4. The regulating valve flow test system for measuring flow characteristics according to claim 1, wherein the method for obtaining the data integrated confidence of the collection time is as follows: Analyzing the difference of the same kind of data at adjacent acquisition moments, and constructing the data fluctuation of the same kind of data at each acquisition moment; According to the difference of the data fluctuation of different kinds of data at adjacent acquisition moments in a steady-state time interval, determining the data relevance of the different kinds of data in the steady-state time interval, wherein the data relevance is used for evaluating the relevance of the data change trend of the data in the steady-state time interval; Calculating the data confidence coefficient of the same kind of data at the acquisition time according to the data volatility corresponding to the steady state time interval of the same kind of data at the acquisition time and the data relevance of all kinds of data at the acquisition time, and recording the normalized value of the accumulated sum of the data confidence coefficients of all kinds of data at the target acquisition time as the data comprehensive confidence coefficient of the target acquisition time.
5. The regulating valve flow test system for measuring flow characteristics of claim 4, wherein said data correlation determination method is: Respectively marking any two different kinds of data as one kind of data and two kinds of data, marking the sum of the absolute values of the differences of the data fluctuation of the one kind of data and the two kinds of data at the same acquisition time in a steady-state time interval as the second sum of the one kind of data and the two kinds of data in the steady-state time interval, and marking the negative correlation processing result of the second sum of the one kind of data and the two kinds of data in the steady-state time interval as the first characteristic value of the one kind of data and the two kinds of data in the steady-state time interval; And recording the positive correlation processing result of the correlation coefficient of the first class data and the second class data in the steady-state time interval and the first characteristic value as the data correlation of the first class data and the second class data in the steady-state time interval.
6. The flow test system of a regulating valve for measuring flow characteristics according to claim 5, wherein the method for obtaining the data integrated confidence of the collection time is as follows: Recording any one kind of data as three kinds of data, recording the absolute value of the difference value between the maximum value of the data correlation corresponding to the steady-state time interval of the three kinds of data at the acquisition time and the data fluctuation of the three kinds of data at the acquisition time as the third absolute value of the three kinds of data at the acquisition time, and recording the third absolute value of the three kinds of data at the acquisition time and the negative correlation processing result of the data fluctuation as the second characteristic value of the three kinds of data at the acquisition time; The positive correlation processing result of the second characteristic value of the three types of data at the acquisition time and the maximum value of the data correlation corresponding to the steady-state time interval of the three types of data at the acquisition time is recorded as the data confidence of the three types of data at the acquisition time; And marking the normalized value of the accumulated sum of the data confidence degrees of all kinds of data at the acquisition time as the data comprehensive confidence degree at the acquisition time.
7. The flow test system of a regulating valve for measuring flow characteristics according to claim 1, wherein the method for obtaining the flow coefficient of the preset valve opening in the steady-state time interval is as follows: obtaining a flow coefficient of a steady-state time interval of each preset valve opening; and recording the positive correlation processing results of the data comprehensive confidence coefficient and the flow coefficient of all the acquisition moments in the steady-state time interval of the preset valve opening as the adjustment flow coefficient of the preset valve opening in the steady-state time interval.
8. The flow test system of a regulating valve for measuring flow characteristics according to claim 1, wherein the specific method for obtaining the characteristic curve of the flow of the regulating valve by performing weighted curve fitting on all preset valve opening and regulating flow coefficients according to the data comprehensive confidence and valve opening steady state of all acquisition moments in a steady state time interval comprises the following steps: according to the data comprehensive confidence coefficient and the valve opening stability of all the acquisition moments in the steady-state time interval, calculating a weight coefficient of the preset valve opening corresponding to the steady-state time interval; And taking the weight coefficient of the preset valve opening as the weight of the preset valve opening, taking the preset valve opening as an independent variable, taking the steady-state time interval adjustment flow coefficient of the preset valve opening as a dependent variable, and performing curve fitting on all the preset valve opening and the adjustment flow coefficient by using a weighted least square method to obtain a characteristic curve of the flow of the regulating valve.
9. The flow test system of claim 8, wherein the weight coefficient of the preset valve opening is in positive correlation with the data integrated confidence and the valve opening stability of all the collection moments in the steady-state time interval.
10. The regulating valve flow test device for measuring flow characteristics comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, and is characterized in that the processor realizes the steps of the regulating valve flow test system for measuring flow characteristics according to any one of claims 1-9 when executing the computer program.

Description

Flow test device and system for regulating valve for measuring flow characteristics Technical Field The application relates to the technical field of flow tests, in particular to a regulating valve flow test device and system for measuring flow characteristics. Background The flow characteristic test of the regulating valve is a special test for analyzing and determining the corresponding relation between the flow and the opening by measuring the flow data of the fluid of the regulating valve under different valve core openings under specific test conditions, and is a key test link for evaluating the performance of the regulating valve and guaranteeing the reliable operation of the regulating valve in an industrial control system. The flow characteristic test of the regulating valve needs to strictly maintain the pressure difference before and after the valve unchanged, measure the flow data of different gears within the opening range from 0% to 100%, and draw the characteristic curve of the flow of the regulating valve. However, the quality of the regulating valve flow collected in the process of the regulating valve flow characteristic test is different, and the value of the regulating valve flow with lower quality can influence the drawing of the characteristic curve of the regulating valve flow, so that the accuracy and reliability of the result of the regulating valve flow characteristic test are insufficient. Disclosure of Invention In order to solve the technical problems, the application provides a regulating valve flow test device and a regulating valve flow test system for measuring flow characteristics, and the adopted technical scheme is as follows: in a first aspect, one embodiment of the present application provides a regulator valve flow test system for measuring flow characteristics, the system comprising the following modules: The data acquisition module is used for acquiring flow data and temperature data of different preset valve openings in the flow test process of the regulating valve and pressure data of a valve inlet and a valve outlet; The steady state degree analysis module is used for analyzing the difference of the valve opening degrees at adjacent acquisition moments and determining the steady state degree of the valve opening degree at each acquisition moment and the steady state time interval of each preset valve opening degree, wherein the steady state degree of the valve opening degree is used for representing the steady state degree of the valve opening degree, and the steady state time interval is the time interval of the valve opening degree stabilization under the preset valve opening degree; The flow coefficient adjustment determination module is used for analyzing the difference of adjacent acquisition moments of different kinds of data in steady-state time intervals in all kinds of data, respectively determining the data comprehensive confidence coefficient of each acquisition moment, wherein the data comprehensive confidence coefficient is used for representing the accuracy of the data acquired at the acquisition moment, and determining the flow coefficient adjustment of the preset valve opening in the steady-state time intervals by combining the flow coefficient of the steady-state time intervals of the preset valve opening, and the flow coefficient adjustment is used for representing the circulation capacity of the regulating valve in the preset valve opening; And the flow characteristic test module is used for carrying out weighted curve fitting on all preset valve opening and adjustment flow coefficients according to the data comprehensive confidence and the valve opening stability at all acquisition moments in the steady-state time interval to obtain a characteristic curve of the flow of the regulating valve and finish the flow characteristic test of the regulating valve. Further, the method for acquiring the valve opening stability at the acquisition time comprises the following steps: and marking any one of the acquisition time as a target acquisition time, marking all the acquisition time within a first preset time length after the target acquisition time as comparison acquisition time, wherein the valve opening stability of the target acquisition time and the difference of the valve opening of all adjacent comparison acquisition time are in a negative correlation. Further, the method for acquiring the steady-state time interval of the preset valve opening comprises the following steps: taking the first acquisition time when the valve opening reaches the same preset valve opening as the initial acquisition time of the same preset valve opening, and establishing a time window with the time length being the second preset time length by taking the initial acquisition time as the center; And establishing a steady-state time interval of the same preset valve opening according to the acquisition time with the maximum valve opening steady-state degree in the time win