CN103217261B - A kind of online test method of hydraulic pipeline leakage - Google Patents
A kind of online test method of hydraulic pipeline leakage Download PDFInfo
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- CN103217261B CN103217261B CN201310097735.6A CN201310097735A CN103217261B CN 103217261 B CN103217261 B CN 103217261B CN 201310097735 A CN201310097735 A CN 201310097735A CN 103217261 B CN103217261 B CN 103217261B
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Abstract
The present invention relates to hydraulic drive field, more particularly to the online test method and device of a kind of hydraulic pipeline leakage, it is characterized in that, the oil inlet quantity of hydraulic cylinder is measured, on the basis of oil inlet quantity of hydraulic cylinder when qualified, the difference of real-time judge oil inlet quantity and a reference value, as the foundation of hydraulic cylinder leakage, it is comprised the following steps that：1）Flowmeter is installed on the in-line of hydraulic cylinder；2）Hydraulic cylinder total travel is stretched out, measures the accumulated number a of flow meter0As a reference value；3）In hydraulic cylinder operation, computer detects integrated flow a during any secondary hydraulic cylinder full stroke in real time, as a and a0When difference exceedes the upper limit, that is, judge that hydraulic cylinder leaks；4）Cut-out pressure source.The upper limit is a0×（0.01~0.1）.Compared with prior art, the beneficial effects of the invention are as follows：Alarm signal cut-out pressure source can be sent in time, reduce environmental pollution and the wasting of resources caused by oil product is lost in；Avoid triggering fire.
Description
Technical field
The present invention relates to the online test method and device of hydraulic drive field, more particularly to a kind of hydraulic pipeline leakage.
Background technology
The widely used hydraulic transmission passing power of hot rolling line at present, hydraulic cylinder pass as executive component and machinery
Dynamic compare has the advantages that small volume, transmission power are big, once the fluid of hydraulic cylinder pipeline leakage touches blank or finished product, by
It is high in the blank and finished product temperature of hot rolling line, fire will be caused, cause heavy losses；Even if the fluid of leakage does not contact
To blank or finished product, fire will not be caused, will also result in serious environmental pollution and the wasting of resources.
The method of detection fluid leakage is mainly also to rely on Grasping level of the individual to accident prediction at present, due to individual
Differ greatly, it is difficult to ensure that effect；Or someone goes to leakage position and found just, such a mode contingency is bigger；Separately
Lower limit value can be reduced to according to the liquid level of fuel tank outside and send alarm, this method oil product wastes relatively more.
The content of the invention
It is an object of the invention to provide a kind of online test method of hydraulic pipeline leakage and device, can detect in time
Leakage problem existing for hydraulic cylinder and its in-line, and alarm signal and cut-out pressure source are sent in time, fault spread is avoided,
Reduce the oil product after pipelines from bursting to waste, prevent disaster hidden-trouble.
In order to solve the above technical problems, the technical scheme is that：
A kind of online test method of hydraulic pipeline leakage, is measured to the oil inlet quantity of hydraulic cylinder, qualified with hydraulic cylinder
When oil inlet quantity on the basis of, the difference of real-time judge oil inlet quantity and a reference value, as hydraulic cylinder and its in-line leak according to
According to it is comprised the following steps that：
1) flowmeter is installed on the in-line of hydraulic cylinder, the flowmeter has accumulative and transporting function；
2) when hydraulic cylinder and its in-line are in eligible state, hydraulic cylinder total travel is stretched out, measures flow meter
Accumulated number a0As a reference value, this value is the internal volume of hydraulic cylinder works chamber；
3) in hydraulic cylinder operation, computer detects integrated flow a during any secondary hydraulic cylinder full stroke in real time, and will be accumulative
Flow a and a reference value a0Compare, as a and a0When difference exceedes the upper limit, that is, judge that hydraulic cylinder or flowmeter downstream in-line occur
Leakage；
4) computer, which sends instruction, closes flowmeter upstream diverter valve, cut-out pressure source.
The upper limit is 0.01a0~0.1a0。
A kind of on-line measuring device of hydraulic pipeline leakage, including flowmeter, the flowmeter are arranged on the oil-feed of hydraulic cylinder
On pipeline, 4~20mA signal output parts of the flowmeter are connected with remote computers.
The flowmeter is close in the port of export of the check valve in reversal valve downstream.
Compared with prior art, the beneficial effects of the invention are as follows：
When equipment is run, leakage problem existing for some hydraulic cylinder and its in-line can be detected in time；Pipeline is quick-fried
After splitting, alarm signal cut-out pressure source can be sent in time, avoid fault spread, reduce because oil product be lost in caused by environmental pollution and
The wasting of resources；Avoid because the fire that oil product splashing triggers occurs.
Brief description of the drawings
Fig. 1 is apparatus of the present invention example structure schematic diagram.
In figure：1- flowmeters 2- check valves 3- hydraulic cylinder 4- electromagnetism (liquid) reversal valve
Embodiment
The embodiment of the present invention is described further below in conjunction with the accompanying drawings：
See Fig. 1, be a kind of on-line measuring device example structure schematic block diagram of hydraulic pipeline leakage of the present invention, including flow
Gauge 1, the flowmeter 1 are arranged on the in-line of hydraulic cylinder 3, and 4~20mA signal output parts of flowmeter 1 with calculating at a distance
Machine is connected.Flowmeter 1 is close in the port of export of the check valve 2 in the downstream of electromagnetism (liquid) reversal valve 4.
The present invention to the oil inlet quantity of hydraulic cylinder by measuring, real and on the basis of oil inlet quantity of hydraulic cylinder when qualified
When judge the difference of oil inlet quantity and a reference value, the foundation leaked as hydraulic cylinder and its in-line, by taking two-way hydraulic cylinder as an example,
It is comprised the following steps that：
1) flowmeter 1 and the ＇ of flowmeter 1, flow are installed respectively on the rodless cavity of hydraulic cylinder 3 and the in-line of rod chamber
Meter 1 is located at the downstream of check valve 2, more near better apart from upstream electromagnetism (liquid) reversal valve 4, between hydraulic cylinder 3 and flowmeter 1
In-line length up to rice up to a hundred, in order to meet to require, function of the counting of flowmeter 1 with accumulative teletransmission, exports sometimes
4-20mA signals are to computer；
2) when hydraulic cylinder and its in-line are in eligible state, hydraulic cylinder total travel is extended and retracted, measured
The accumulated number a of flowmeter0And a0For ＇ as a reference value, this value is correspondingly the internal volume of hydraulic cylinder works chamber；
3) in hydraulic cylinder operation, executive program detects integrated flow a during any secondary hydraulic cylinder full stroke in real time,
And in real time by integrated flow a and a reference value a0Compare, as a and a0When difference exceedes the upper limit, that is, judge that hydraulic cylinder leaks；Nothing
Rod cavity and rod chamber each judge respectively, when there is side numerical value and transfinite and opposite side it is normal when, prompt the side in-line that transfinites
May leakage；And when both sides numerical value transfinites, pipeline is being excluded because under external force breakage, leakage possibility is big in hydraulic cylinder；
4) computer, which sends instruction, closes flowmeter upstream electromagnetism (liquid) reversal valve 4, cut-out pressure source, avoids accident from expanding
Greatly, operating personnel enter the inspection and maintenance that scene carries out hydraulic cylinder and its in-line, change the pipeline and seal of leakage.
The upper limit set in program is 0.01a0~0.1a0, limit value can select according to actual conditions.
Claims (1)
1. a kind of online test method of hydraulic pipeline leakage, it is characterised in that realize the hydraulic tube of the online test method
Road leakage on-line measuring device include flowmeter, the flowmeter is arranged on the in-line of hydraulic cylinder, flowmeter 4~
20mA signal output parts are connected with remote computers, and flowmeter is close in the port of export of the check valve in solenoid directional control valve downstream；
By being measured to the oil inlet quantity of hydraulic cylinder, and on the basis of oil inlet quantity of hydraulic cylinder when qualified, real-time judge oil-feed
The difference of amount and a reference value, the foundation leaked as hydraulic cylinder and its in-line, is comprised the following steps that：
1) flowmeter is installed respectively on the rodless cavity of hydraulic cylinder and the in-line of rod chamber, flowmeter is located under check valve
Trip, more near better apart from upstream solenoid directional control valve, the in-line length between hydraulic cylinder and flowmeter reaches rice up to a hundred, flowmeter
Function of the counting with accumulative teletransmission, export 4-20mA signals to computer；
2) when hydraulic cylinder and its in-line are in eligible state, hydraulic cylinder total travel is extended and retracted, measures outflow
The accumulated number a of meter0As a reference value, this value is correspondingly the internal volume of hydraulic cylinder works chamber；
3) in hydraulic cylinder operation, executive program detects integrated flow a during any secondary hydraulic cylinder full stroke in real time, and in fact
When by integrated flow a and a reference value a0Compare, as a and a0When difference exceedes the upper limit, that is, judge that hydraulic cylinder leaks；Rodless cavity
Each judge respectively with rod chamber, when there is side numerical value and transfinite and opposite side it is normal when, prompting to transfinite side in-line may
Leakage；And when both sides numerical value transfinites, pipeline is being excluded because under external force breakage, leakage possibility is big in hydraulic cylinder；
4) computer, which sends instruction, closes flowmeter upstream solenoid directional control valve, cut-out pressure source, avoids fault spread, operator
Member enters the inspection and maintenance that scene carries out hydraulic cylinder and its in-line, changes the pipeline and seal of leakage；
The upper limit set in program is 0.01a0~0.1a0。
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| CN201310097735.6A CN103217261B (en) | 2013-03-23 | 2013-03-23 | A kind of online test method of hydraulic pipeline leakage |
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| CN201310097735.6A CN103217261B (en) | 2013-03-23 | 2013-03-23 | A kind of online test method of hydraulic pipeline leakage |
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| CN103217261A CN103217261A (en) | 2013-07-24 |
| CN103217261B true CN103217261B (en) | 2018-02-27 |
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| KR101539084B1 (en) * | 2014-09-02 | 2015-07-23 | 부림자동화(주) | Cushion efficiency and stroke measuring equipment and the measuring method that use flow meter |
| CN105698717B (en) * | 2016-01-21 | 2019-01-29 | 山东科技大学 | Movable post contracting amount monitor |
| CN105605002B (en) * | 2016-03-18 | 2018-03-02 | 中冶赛迪工程技术股份有限公司 | The hydraulic control circuit and its method of anti-decompression |
| CN110296126A (en) * | 2019-07-12 | 2019-10-01 | 南通翔骜液压润滑设备有限公司 | The hydraulic cylinder for having detection hydraulic oil |
| CN113294406A (en) * | 2020-02-21 | 2021-08-24 | 北京福田康明斯发动机有限公司 | Hydraulic cylinder state monitoring system and method and hydraulic clamp system |
| CN113358300B (en) * | 2021-05-27 | 2023-03-24 | 中冶赛迪工程技术股份有限公司 | Hydraulic system pipeline leakage state detection system |
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| CN102636321A (en) * | 2012-04-12 | 2012-08-15 | 三一重型装备有限公司 | Leakage diagnostic system and method of hydraulic bracket as well as hydraulic bracket |
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| JP3895012B2 (en) * | 1997-07-31 | 2007-03-22 | 株式会社ガスター | Water leak inspection device and inspection method |
| JP5132737B2 (en) * | 2010-08-31 | 2013-01-30 | Ｊｆｅスチール株式会社 | Water pressure test equipment for welded steel pipes |
| CN202066653U (en) * | 2011-04-12 | 2011-12-07 | 洛阳西苑车辆与动力检验所有限公司 | Automatic oil circuit leakage detection and control system of test bed of vehicle part |
| CN202101830U (en) * | 2011-06-02 | 2012-01-04 | 广东省韶关钢铁集团有限公司 | Mobile hydraulic oil cylinder leak tester |
| CN202339255U (en) * | 2012-03-27 | 2012-07-18 | 广新海事重工股份有限公司 | Hydraulic and mechanical combined valve pressure tester |
| CN202582854U (en) * | 2012-06-05 | 2012-12-05 | 北京中防恒立人防设备有限公司 | Hydraulic station for testing air tightness of butterfly valve |
| CN102865271A (en) * | 2012-09-28 | 2013-01-09 | 天津鼎成高新技术产业有限公司 | Detection method and device of internal leakage of hydraulic valve |
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| CN102636321A (en) * | 2012-04-12 | 2012-08-15 | 三一重型装备有限公司 | Leakage diagnostic system and method of hydraulic bracket as well as hydraulic bracket |
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