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Valve inner leakage rate evaluation device and grade evaluation method

An evaluation device and a technology for evaluating grades, applied to measuring devices, by detecting the appearance of fluid at the leakage point, and by measuring the increase and deceleration rate of the fluid, etc., it can solve the problems of dependence on measurement and detection, failure to classify and diagnose valve leaks, etc., to achieve Ease of implementation, avoidance of economic losses, and safe use

Pending Publication Date: 2021-12-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Among the above-mentioned test devices for detecting valve leakage rate, the former requires manual measurement, and its metering detection is more dependent on manual work; although the latter can be automated through an automatic control unit, it cannot be used for grading and diagnosing valve internal leakage

Method used

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  • Valve inner leakage rate evaluation device and grade evaluation method
  • Valve inner leakage rate evaluation device and grade evaluation method
  • Valve inner leakage rate evaluation device and grade evaluation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] A valve internal leakage leakage rate evaluation grade method, which uses a valve internal leakage leakage rate evaluation device, including an air storage tank, an air compressor, valve two, a flow meter and a test valve, and the air compressor is used for air storage tanks. Stamping, the pipeline connected between the gas storage tank and the flow meter is provided with the valve 2 and the test valve in sequence, the test valve is equipped with an acoustic sensor, and the acoustic sensor is connected to an acoustic sensor through a data line. Acquisition equipment; a pressure gauge is installed on the gas storage tank, and when the air compressor punches the gas storage tank, the pressure value is monitored through the pressure gauge.

[0074] The evaluation grade method of valve internal leakage leakage rate specifically includes the following steps:

[0075] The first step is to measure the acoustic parameter AErms through the acoustic sensor, and measure the intern...

Embodiment 2

[0079] Valve internal leakage leakage rate evaluation device, including air storage tank, air compressor, valve two, flow meter and test valve, the air compressor is used to press the air storage tank, and the connection between the air storage tank and the flow meter The second valve and the test valve are arranged in sequence on the pipeline, and an acoustic sensor is installed on the test valve, and the acoustic sensor is connected to an acoustic acquisition device through a data line; a pressure gauge is installed on the gas storage tank. When the air compressor described above punches the air storage tank, the pressure value is monitored by the pressure gauge described above.

[0080] According to "GBT 4213-2008 Pneumatic Control Valve" and "GBT17214.2-2005 Industrial Process Control Valve Part 5-1", the formula for calculating the rated capacity of the valve is shown in the table below.

[0081] Table 1 Calculation formula of valve rated capacity

[0082]

[0083] Am...

Embodiment 3

[0111] Valve internal leakage leakage rate evaluation device, including air storage tank, air compressor, valve two, flow meter and test valve, the air compressor is used to press the air storage tank, and the connection between the air storage tank and the flow meter The second valve and the test valve are arranged in sequence on the pipeline, and an acoustic sensor is installed on the test valve, and the acoustic sensor is connected to an acoustic acquisition device through a data line; a pressure gauge is installed on the gas storage tank. When the air compressor described above punches the air storage tank, the pressure value is monitored by the pressure gauge described above.

[0112] On the basis of Example 2, the test valve is a gate valve at 0.1 MPa as an example.

[0113] Pressurize using a compressor. The test pressure is tested at 0.1MPa. The test uses a DN65 gate valve. The leakage flow rate is adjusted by adjusting the opening of the gate valve. It is measured by...

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Abstract

The invention discloses a valve inner leakage rate evaluation device and a grade evaluation method, and relates to the technical field of valve leakage detection of petrochemical enterprises. The invention just aims to solve the technical problem that in the prior art, a testing device cannot conduct grading diagnosis on valve inner leakage. The evaluation device comprises an air storage tank, an air compressor, a second valve, a flow meter and a test valve; an acoustic sensor is installed on the test valve, and the acoustic sensor is connected with acoustic acquisition equipment through a data line. After an evaluation test is started, acoustic signals are collected through the acoustic acquisition equipment, parameter information such as a pressure value and a gas flow value is recorded, function fitting is carried out according to an inner leakage flow Q-AErms curve, and then a Q-AErms fitting function is obtained; and on the basis of a flow grade division standard, the AErms evaluation standard of the internal leakage of the test valve is obtained. According to the device and method, the inner leakage level of the valve can be judged on line through the acoustic parameters without shutdown; and the device and the method can be popularized and used in petrochemical enterprises.

Description

technical field [0001] The invention relates to the technical field of valve leakage detection in petrochemical enterprises, in particular to a valve internal leakage rate evaluation device and evaluation grade method. Background technique [0002] Valves are an essential part of process installations in the petroleum and petrochemical industries. At present, with the continuous development of equipment manufacturing technology, the valves used in petrochemical plants have generally been improved in terms of volume, structural complexity and technical level. With the continuous diversification of the production process and material types of petrochemical plants, the operating conditions of valves have become increasingly complex and harsh, and the opening and closing operations of valves have become increasingly frequent, coupled with improper use and maintenance factors, making valves in petrochemical plants run, pop, drip, and leak Phenomena happen from time to time. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/28G01M3/24
CPCG01M3/2876G01M3/24
Inventor 王琼魏新明贾润中朱亮肖安山朱胜杰
Owner CHINA PETROLEUM & CHEM CORP
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