CN106768715B - High-pressure system venting duration predictor method and system containing accumulator - Google Patents
High-pressure system venting duration predictor method and system containing accumulator Download PDFInfo
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- CN106768715B CN106768715B CN201611067858.5A CN201611067858A CN106768715B CN 106768715 B CN106768715 B CN 106768715B CN 201611067858 A CN201611067858 A CN 201611067858A CN 106768715 B CN106768715 B CN 106768715B
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- pressure
- venting duration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
Abstract
A kind of high-pressure system venting duration predictor method containing accumulator, working connection oil pressure in the high-pressure system containing accumulator is acquired first to change with time data, the matched curve between system pressure drop and venting duration of the test process by 30s when is obtained according to statistical data, to which the actual test time is foreshortened to 30s, and estimate out the testing time after 30s.The present invention can greatly reduce the testing time under the premise of guaranteeing to estimate accuracy, improve production efficiency.
Description
Technical field
The present invention relates to a kind of technology in hydraulic test field, specifically a kind of high-pressure system pressure release containing accumulator
Time predictor method and system.
Background technique
For valve body, valve seal is a critically important index for measuring valve body performance, traditional leak-
Down test process includes: to close all solenoid valves, starts motor, is pressurized to 62bar, then monitoring and control recording system pressure from
62bar is reduced to the time of 41.5bar, and traditional testing standard is 100S, and test period is longer, has seriously affected production section
It claps, therefore finding one kind can reaction system leakage characteristics and to save the test method of testing time particularly important.
Summary of the invention
The present invention In view of the above shortcomings of the prior art, proposes that a kind of high-pressure system venting duration containing accumulator is pre-
Estimate method and system, the testing time can be greatly reduced under the premise of guaranteeing to estimate accuracy, improve production efficiency.
The present invention analyzes its curve feature, then seeks selection according to curve characteristic and close by studying pressure release curve
Suitable test method, the pressure release curve of system can be divided into two parts at room temperature: exponential part and linear segment, due to linear portion
Slope is divided to be held essentially constant, and curve is gentle, therefore predominantly exponential part, the entire venting duration that influence pressure release can divide
For two parts, the venting duration of exponential part and the venting duration of straight line portion, the pressure drop of exponential part is very big, passes through comparison
A large amount of pressure release curve discoveries, the pressure drop of system is not much different substantially within the preceding 15s and 30s time, by comparing a large amount of racks
Statistical number is it has been found that pressure drop base of the pressure drop time substantially within 10bar, within 30s when venting duration is 100s, in 15s
This devises two kinds of predictor methods according to system pressure drop and curve feature: a kind of for letting out after 30s all within 12bar
Crimping section is essentially straight, therefore substantially can be with Prediction System according to the slope statistics lower limit of residual curve section after 30s
Venting duration；Another is tested according to the statistical data relationship matched curve of system pressure drop characteristic and venting duration
Card.
The present invention relates to a kind of high-pressure system venting duration predictor method containing accumulator, first height of the acquisition containing accumulator
Working connection oil pressure changes with time data in pressure system, obtains system pressure of the test process by 30s when according to statistical data
Drop the matched curve between venting duration, so that the actual test time is foreshortened to 30s, and when estimating out the test after 30s
Between.
The matched curve be it is following any one
①Or
2. Y=0.0028052X2- 0.91285X+795.02,
Wherein: Y represents venting duration, and X represents the voltage drop value of system 30s, unit Kpa.
The present invention relates to a kind of systems for realizing the above method, comprising: detection module and the speed change being attached thereto respectively
Case control unit and data collection system with sensing module, detection module are controlled by CAN communication agreement to gearbox single
Member sends control instruction, and gear box control unit is connected with hydraulic module and exports pressure release instruction, to the motor in hydraulic module
It is controlled with solenoid valve, detection module is instructed according to the pressure release with timestamp from gear box control unit and setting
Venting duration is calculated in the pressure detecting information of the sensing module feedback on monitor station.
Fuel feeding oil draining system is further provided on the hydraulic module, the fuel feeding oil draining system by with valve body pouring orifice
Connected oiling is popped one's head in hydraulic module fuel feeding to guarantee the oil mass in hydraulic module, and extra oil mass is from valve body in test process
Oil return opening into cross rack on oil-drain pipe return in fuel tank.
Detailed description of the invention
Fig. 1 is the linear verification schematic diagram of pressure release after 30s；
Fig. 2 is venting duration and sample size schematic diagram in embodiment；
Fig. 3 is 30s pressure drop and sample size schematic diagram in embodiment；
Fig. 4 is present system schematic diagram；
Fig. 5 is 5000 deck valve body 30s pressure drops in embodiment and corresponding system decompression time (including original 30s) statistical data
Schematic diagram；
Fig. 6 is the pressure release curve synoptic diagram measured in embodiment using this system.
Specific embodiment
As shown in Figure 1, X-axis is the working connection pressure drop after 30S, Y-axis in figure for the linear verification schematic diagram of pressure release after 30s
Venting duration after 30S, according to the phase relation coefficient for calculating both the working connection pressure drop after venting duration and 30S after 30S
(coefficient)=0.8593, belong to strong correlation relationship.
As shown in figure 4, being the detection system of the present embodiment, comprising: detection module and the gearbox being attached thereto respectively
Control unit and data collection system with sensing module, detection module is by CAN communication agreement to gear box control unit
Send control instruction, gear box control unit be connected with hydraulic module and export pressure release instructs, in hydraulic module motor with
Solenoid valve is controlled, and detection module is instructed and is set to according to the pressure release with timestamp from gear box control unit
Venting duration is calculated in the pressure detecting information of sensing module feedback on monitor station.
The present embodiment with 5000 deck valve body 30s pressure drops and corresponding system decompression time (including original 30s) statistical data into
Row is actually detected, as shown in Figures 2 and 3, it is as follows to obtain data:
| Mean value | Standard deviation | Maximum value | Minimum value | |
| Working connection venting duration (unit: second) | 155.8308 | 36.30263 | 220.0338 | 40 |
| 30s working connection voltage drop value (unit: kPa) | 1045.812 | 213.2035 | 5138.777 | 854 |
As shown in fig. 6, being using the venting duration that matched curve 1 is estimated out when the voltage drop value of 30s is 1149.3
104.37s is 117s using the venting duration that matched curve 2 estimates, as shown in Figure 6 with the system true dwell time (117s)
It is almost the same.
Above-mentioned specific implementation can by those skilled in the art under the premise of without departing substantially from the principle of the invention and objective with difference
Mode carry out local directed complete set to it, protection scope of the present invention is subject to claims and not by above-mentioned specific implementation institute
Limit, each implementation within its scope is by the constraint of the present invention.
Claims (3)
1. a kind of high-pressure system venting duration predictor method containing accumulator, which is characterized in that height of the acquisition containing accumulator first
Working connection oil pressure changes with time data in pressure system, obtains system pressure of the test process by 30s when according to statistical data
Drop the matched curve between venting duration, so that the actual test time is foreshortened to 30s, and when estimating out the test after 30s
Between；
The matched curve be it is following any one
①Or
2. Y=0.0028052X2- 0.91285X+795.02,
Wherein: Y represents venting duration, and X represents the voltage drop value of system 30s, unit Kpa.
2. a kind of system for realizing claim 1 the method characterized by comprising detection module and respectively phase therewith
The gear box control unit connected and the data collection system with sensing module, detection module pass through CAN communication agreement to speed change
Case control unit sends control instruction, and gear box control unit is connected with hydraulic module and exports pressure release instruction, to hydraulic module
Interior motor and solenoid valve is controlled, and detection module is instructed according to the pressure release with timestamp from gear box control unit
And venting duration is calculated in the pressure detecting information for the sensing module feedback being set on monitor station.
3. system according to claim 2, characterized in that be further provided with fuel feeding oil extraction system on the hydraulic module
System, the fuel feeding oil draining system are popped one's head in hydraulic module fuel feeding by the oiling being connected with valve body pouring orifice to guarantee in hydraulic module
Oil mass, extra oil mass returns in fuel tank from the oil return opening of valve body into the oil-drain pipe crossed on rack in test process.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611067858.5A CN106768715B (en) | 2016-11-28 | 2016-11-28 | High-pressure system venting duration predictor method and system containing accumulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611067858.5A CN106768715B (en) | 2016-11-28 | 2016-11-28 | High-pressure system venting duration predictor method and system containing accumulator |
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| Publication Number | Publication Date |
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| CN106768715A CN106768715A (en) | 2017-05-31 |
| CN106768715B true CN106768715B (en) | 2019-01-08 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012147621A (en) * | 2011-01-14 | 2012-08-02 | Chugoku Electric Power Co Inc:The | Blackout relief system |
| CN103331937A (en) * | 2013-07-04 | 2013-10-02 | 天津市天锻压力机有限公司 | Numerical control hydraulic machine decompression system based on pressure feedback |
| WO2014128132A1 (en) * | 2013-02-20 | 2014-08-28 | Bp Exploration Operating Company Limited | Monitoring system and method |
| CN104865026A (en) * | 2015-04-12 | 2015-08-26 | 中国计量学院 | Polyethylene valve sealing performance room temperature low pressure test method |
-
2016
- 2016-11-28 CN CN201611067858.5A patent/CN106768715B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012147621A (en) * | 2011-01-14 | 2012-08-02 | Chugoku Electric Power Co Inc:The | Blackout relief system |
| WO2014128132A1 (en) * | 2013-02-20 | 2014-08-28 | Bp Exploration Operating Company Limited | Monitoring system and method |
| CN103331937A (en) * | 2013-07-04 | 2013-10-02 | 天津市天锻压力机有限公司 | Numerical control hydraulic machine decompression system based on pressure feedback |
| CN104865026A (en) * | 2015-04-12 | 2015-08-26 | 中国计量学院 | Polyethylene valve sealing performance room temperature low pressure test method |
Non-Patent Citations (1)
| Title |
|---|
| 风城SAGD 生产水平井合理压井时机确定方法探讨;陈森等;《钻采工艺》;20120930;正文第53页左栏2． SAGD 水平井泄压时间确定方法及图1 |
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| CN106768715A (en) | 2017-05-31 |
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