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Method for measuring flow of valve

A technology of valve flow and measurement method, which is applied in the direction of detecting fluid flow by measuring differential pressure, volume/mass flow generated by mechanical effects, etc., can solve the problems such as inability to apply valve flow measurement, and achieve the effect of high practical value

Inactive Publication Date: 2013-05-01
卓旦春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen that it measures the pipeline of fixed size, because the opening of the valve may change when it is used, so it cannot be applied to the flow measurement of the valve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The measuring method of the valve flow includes the following steps:

[0027] A. Measuring the flow coefficient: The valve opening is measured for each integer percentage within the range of 1%-100%, and 100 sets of values ​​are obtained and recorded in turn. In this embodiment, a table corresponding to the valve is formulated, and the flow coefficients corresponding to each opening degree are recorded in ascending order on the table. Since the model and size of each valve are different, a table corresponding to it should be formulated. Of course, according to the actual situation, it is also feasible to record the data of the flow coefficient corresponding to each opening degree in the computer database.

[0028] B. Measuring the pressure difference: use a common pressure gauge to measure the front and rear ends of the valve respectively to obtain the pressure difference between the front and rear ends of the valve. According to the actual situation, it is also feasi...

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Abstract

The invention provides a method for measuring the flow of a valve, belonging to the technical field of valves. The method is used for solving the problem that the existing flow measurement device cannot be applicable to the measurement of the flow of the valve due to low applicability. The method comprises the following steps of: (A) measuring flow coefficients: measuring and recording the flow coefficients of the valve at all opening degrees; (B) measuring pressure difference: measuring the pressure difference between a front end and a rear end of the valve; (C) calculating the flow: calculating the flow by using a formula (shown in a drawing), wherein Q is the flow of the valve at a current opening degree, KV is the flow coefficient of the valve at the current opening degree, and the deltaP is the pressure difference between the front end and the rear end of the valve at the current opening degree. According to the method, flows, corresponding to different opening degrees, of the valve can be calculated, so that the method has higher practical value.

Description

technical field [0001] The invention belongs to the technical field of valves and relates to a method for measuring valve flow. Background technique [0002] Valve flow coefficient is usually called in China: KV value, KV represents the flow capacity of the valve. The KVS value is the KV value when the valve is fully open. For example, a regulating valve with Kvs=50 means that when the pressure difference between the two ends of the valve is 100KPa, the water volume per hour when the valve is fully open is 50m 3 . [0003] Valve opening refers to the movement position of the valve core (or valve plate) when the valve core (or valve plate) changes the throttling area of ​​the flow channel when the valve is adjusted. It is usually expressed as a percentage. 100%. [0004] Traditional valves have no flow display function. However, the general flow measuring device has no valve adjustment and switching functions, and the flow measuring device is expensive and has a high fail...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/34
Inventor 卓旦春
Owner 卓旦春