CN109990750A - A kind of cutter head of shield machine abrasion on-line measurement device - Google Patents
A kind of cutter head of shield machine abrasion on-line measurement device Download PDFInfo
- Publication number
- CN109990750A CN109990750A CN201910314467.6A CN201910314467A CN109990750A CN 109990750 A CN109990750 A CN 109990750A CN 201910314467 A CN201910314467 A CN 201910314467A CN 109990750 A CN109990750 A CN 109990750A
- Authority
- CN
- China
- Prior art keywords
- hydraulic cylinder
- diameter
- oil pump
- shell
- telescopic rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The present invention provides a kind of cutter head of shield machine to wear on-line measurement device, utilize the foam hole on existing cutter head of shield machine, pass through hydraulic cylinder, pressure sensor, displacement sensor, on-line measurement may be implemented, reduction personnel, which pressurize, to construct, measuring device is simple, and the convenient abrasion loss for grasping cutter at any time avoids delay the duration.
Description
Technical field
The invention belongs to a kind of cutterheads to wear on-line measurement device, and more specifically to a kind of cutter head of shield machine abrasion exists
Line measuring device.
Background technique
With shield machine being widely used at home, the length of tunnel of single driving is constantly extending in addition, tool wear
Have become the critical issue for influencing construction quality and progress.Important component of the cutterhead as shield machine, periodically checks
With maintenance, accurate grasp cutter service condition, have great significance.And earth pressure balanced shield, EPBS method is as common shield side at present
Formula, in order to detect the abrasion condition of knife disc tool, in this case, cutterhead inspection and tool maintenance be under an increased pressure into
Capable, band press operation is generally required, this process is extremely troublesome and dangerous, and by the way of no press operation, process
It is often troublesome, it can devote a tremendous amount of time, delay the duration.
In order to avoid the trouble of above-mentioned artificial detection, currently, carrying out the mode master of real-time monitoring to the wear condition of cutter
It include: 1) fluid pressure type, when tool wear is extremely prescribed a time limit, hydraulic fluid leak, PLC automatic alarm；2) electromagnetic type, tool wear is extremely
When the limit, probe contacts in cutter are embedded in stratum, and electromagnetic circuit disconnects, and receiver does not receive electromagnetic signal, alarms
Device starting；3) ultrasonic type carries out real-time monitoring to the abrasion loss of cutter, can grasp the wear condition of cutter at any time.At that time, by
Very severe in the working environment of shield machine, above-mentioned detection can be spent a large amount of again once failing by the way of artificial detection
Time, schedule delays.
Summary of the invention
The present invention provides a kind of cutter head of shield machine abrasion on-line measurement side to overcome the deficiencies in the prior art
Method, this method can wear cutterhead in the way of mechanical carries out periodic detection, implements the abrasion condition for grasping cutterhead.
The present invention provides a kind of cutter head of shield machine wear on-line measurement device, the measuring device include hydraulic cylinder and
Oil pump, oil pump are used to provide hydraulic oil to hydraulic cylinder, and hydraulic cylinder includes shell and telescopic rod, and telescopic rod is stretched from shell
Out, the rear end of shell is provided with displacement sensor, the front of shell is provided with flange, shell further includes sealing drum, close
The front end of flange is arranged in sealed tube, several foam holes are evenly equipped on cutterhead, and the diameter of flange is greater than the diameter of foam hole, sealing
The diameter of cylinder is slightly less than the diameter of flange, opens up in the peripheral side of sealing drum fluted, and gas-flow closure is fixedly installed in groove
Circle, is provided with pressure sensor on oil pump, wherein pressure sensor is used to detect the pressure of the hydraulic oil of oil pump output, position
Displacement sensor is used to detect the displacement of telescopic rod；It further includes display device that cutterhead, which wears on-line measurement device, and display device is used for
Display pressure sensor and displacement sensor detect real time data, in the initial state, i.e., in the state that telescopic rod does not extend out,
The end of telescopic rod and the front end side of sealing drum are concordant, and display device shows that the numerical value of displacement sensor is 0 at this time.
Preferably, the diameter of boom is less than the diameter of foam hole.
Preferably, the stretching speed of oil cylinder is controlled, so that hydraulic cylinder is from the time for touching the excavation soil body is started to
3-5 minutes.
Preferably, it chooses even number foam hole to measure, even number foam hole is uniformly distributed along circumferential direction.
Preferably, on the pipeline of oil pump to hydraulic cylinder, it is also in series with check valve, in the pipeline of oil pump to hydraulic cylinder
On, also it is parallel with safety valve.
Beneficial effects of the present invention are as follows:
1. the present invention is using the foam hole on existing cutter head of shield machine, by hydraulic cylinder, pressure sensor, displacement sensor,
On-line measurement may be implemented, reduce personnel's pressurization construction, measuring device is simple, and the convenient abrasion loss for grasping cutter at any time avoids
Schedule delays；Meanwhile by adding sealing drum in hydraulic cylinder front end, the pressure for excavating the soil body can be avoided during measurement
The pressure leakage in storehouse restores speed of application when can greatly improve construction again, improves construction efficiency.
2. the present invention detects pressure change using pressure sensor, by the pressure change of pressure sensor, displacement is realized
Measurement, it is easy to detect, and by the stretching speed of control oil cylinder, so that hydraulic cylinder excavates the soil body from starting to touch
Time is 3-5 minutes, guarantees that time enough enables and generates pressure change convenient for pressure sensor, guarantees measurement result
Accuracy.
3. choosing even number foam hole to measure, even number foam hole is uniformly distributed along circumferential direction, passes through even number foam
The measurement result in hole, averages, and improves the accuracy of testing result.
4. the front end of the shell of hydraulic cylinder of the invention is provided with flange, positioned, is protected when oil cylinder being facilitated to test
Demonstrate,prove measurement accuracy.
Detailed description of the invention
Fig. 1 is the front view of cutter head structure schematic diagram of the invention.
Fig. 2A is the side view of cutter head structure schematic diagram of the present invention；
Fig. 2 B is the partial enlarged view at the side view foam hole of cutter head structure schematic diagram of the present invention.
Appended drawing reference in figure be respectively as follows: 1- foam hole, 2- telescopic rod, 3- flange, 4- sealing drum, 5- gas-flow closure circle,
6- shell, 7- cutterhead.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
With reference to attached drawing 1, the schematic diagram of the cutterhead shown is evenly equipped with several to improve the performance of spoil on cutterhead 7
A foam hole 1, foam hole is specifically arranged as 6 in the present embodiment, and the dual-pilot cutter on cutterhead is also uniformly dispersed in the periphery of cutterhead.
With reference to attached drawing 2, a kind of cutter head of shield machine abrasion on-line measurement device is shown, the measuring device includes hydraulic oil
Cylinder and oil pump, for oil pump for giving hydraulic cylinder to provide hydraulic oil, hydraulic cylinder includes shell 6 and telescopic rod 2, and telescopic rod 2 is from shell
It is stretched out in body 6, the rear end of shell is provided with displacement sensor, the front of shell is provided with flange, shell further includes close
The front end of flange 3 is arranged in sealed tube 4, sealing drum, and the diameter of flange is greater than the diameter of foam hole, and the diameter of sealing drum is slightly less than convex
The diameter of edge, opens up fluted in the peripheral side of sealing drum, and gas-flow closure circle 5 is fixedly installed in groove, is arranged on oil pump
There is pressure sensor, wherein pressure sensor is used to detect the pressure of the hydraulic oil of oil pump output, and displacement sensor is used to detect
The displacement of telescopic rod；Cutterhead abrasion on-line measurement device further includes display device (not shown), and display device is for showing
Pressure sensor and displacement sensor detect real time data, in the initial state, i.e., in the state that telescopic rod does not extend out, stretch
The end of bar and the front end side of sealing drum are concordant, and display device shows that the numerical value of displacement sensor is 0 at this time.
A kind of measurement method of cutter head of shield machine abrasion on-line measurement device of offer of the invention, comprising the following steps:
A, installation cutterhead wears on-line measurement device, and the measuring device includes hydraulic cylinder and oil pump, and oil pump is used for hydraulic
Oil cylinder provides hydraulic oil, and hydraulic cylinder includes shell and telescopic rod, and telescopic rod is stretched out from shell, is arranged in the rear end of shell
There is displacement sensor, the front of shell is provided with flange, shell further includes sealing drum, and the front end of flange is arranged in sealing drum,
The diameter of flange is greater than the diameter of foam hole, and the diameter of sealing drum is slightly less than the diameter of flange, and wherein the length of sealing drum is L1,
I.e. from the front end face of flange to the length of the front end face of sealing drum be L1, opened up in the peripheral side of sealing drum it is fluted, in groove
It is fixedly installed with gas-flow closure circle, pressure sensor is provided on oil pump, wherein pressure sensor is for detecting oil pump output
Hydraulic oil pressure, displacement sensor is used to detect the displacement of telescopic rod；Cutterhead abrasion on-line measurement device further includes display
Device (not shown), display device is for showing that pressure sensor and displacement sensor detect real time data, initial
Under state, i.e., in the state that telescopic rod does not extend out, the end of telescopic rod and the front end side of sealing drum are concordant, and display device is aobvious at this time
The numerical value for showing displacement sensor is 0；
B, the preparation of on-line measurement is evenly equipped with several foam holes on cutterhead, remote in cutterhead when shield machine stops working
The side of excavator body is left, the thickness L2 of cutterhead at foam hole is measured, cutterhead abrasion on-line measurement device is put perpendicular to cutterhead
It sets, sealing drum is protruded into foam hole, the flange of the measuring device is abutted to the inside of foam hole, position as shown in Figure 2,
It is inflated using air charging system to gas-flow closure circle, so that gas-flow closure circle is abutted to the inner wall of foam hole, avoids spoil side
Pressure leakage；
C, on-line measurement, starting hydraulic cylinder stretch out telescopic rod along the direction of foam hole, and record pressure sensor inspection in real time
The pressure measured, before telescopic rod touches and excavates the soil body, the pressure value that pressure sensor detects is that fluctuation is lesser big
The pressure for causing constant pressure or smooth change, when telescopic rod, which touches, excavates the soil body, pressure that pressure sensor detects
Value can generate violent variation, and the numerical value for recording displacement sensor at this time is denoted as L3, then the cutter length of cutterhead is L=L1+
L3-L2;
D, it obtains the abrasion loss of cutterhead, repeats step B-C, measure the cutter length of corresponding cutterhead at multiple foam holes, acquire
Average value, the as length of cutter at this time, compare the initial length of cutter, the abrasion loss of you can get it cutterhead at this time.
Wherein, the diameter of telescopic rod is less than the diameter of foam hole.
Moreover, control the stretching speed of oil cylinder in step C, so that hydraulic cylinder touches the excavation soil body from starting to
Time be 3-5 minutes, consequently facilitating pressure sensor can generate pressure change.
In step D, it is preferable that it chooses two foam holes and measures, two foam holes are spaced 180 ° along circumferential direction,
It by the measurement result of two foam holes, averages, improves the accuracy of testing result.
In addition, being also in series with check valve on the pipeline of oil pump to hydraulic cylinder, prevent oil liquid from flowing backwards, in oil pump to liquid
On the pipeline of compressing cylinder, it is also parallel with safety valve, protects hydraulic system.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (5)
1. a kind of cutter head of shield machine wears on-line measurement device, the measuring device includes hydraulic cylinder and oil pump, and oil pump is used for
Hydraulic oil is provided to hydraulic cylinder, hydraulic cylinder includes shell and telescopic rod, and telescopic rod is stretched out from shell, in the rear end of shell
Portion is provided with displacement sensor, the front of shell is provided with flange, shell further includes sealing drum, and flange is arranged in sealing drum
Front end is evenly equipped with several foam holes on cutterhead, and the diameter of flange is greater than the diameter of foam hole, and the diameter of sealing drum is slightly less than convex
The diameter of edge, opens up fluted in the peripheral side of sealing drum, and gas-flow closure circle is fixedly installed in groove, is provided on oil pump
Pressure sensor, wherein pressure sensor is used to detect the pressure of the hydraulic oil of oil pump output, and displacement sensor is used to detect to stretch
The displacement of contracting bar；Cutterhead abrasion on-line measurement device further includes display device, and display device is for showing pressure sensor and position
Displacement sensor detects real time data, in the initial state, i.e., in the state that telescopic rod does not extend out, the end of telescopic rod and sealing
The front end side of cylinder is concordant, and display device shows that the numerical value of displacement sensor is 0 at this time.
2. measuring device according to claim 1, the diameter of boom is less than the diameter of foam hole.
3. measuring device according to claim 1 controls the stretching speed of oil cylinder, so that hydraulic cylinder is from starting to contact
It is 3-5 minutes to the time for excavating the soil body.
4. measuring device according to claim 1 is chosen even number foam hole and measured, even number foam hole is circumferentially
Direction is uniformly distributed.
5. measuring device according to claim 1 is also in series with check valve on the pipeline of oil pump to hydraulic cylinder,
On oil pump to the pipeline of hydraulic cylinder, it is also parallel with safety valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910314467.6A CN109990750B (en) | 2019-04-18 | 2019-04-18 | Shield constructs machine cutter head wearing and tearing on-line measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910314467.6A CN109990750B (en) | 2019-04-18 | 2019-04-18 | Shield constructs machine cutter head wearing and tearing on-line measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109990750A true CN109990750A (en) | 2019-07-09 |
| CN109990750B CN109990750B (en) | 2020-11-06 |
Family
ID=67134089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910314467.6A Active CN109990750B (en) | 2019-04-18 | 2019-04-18 | Shield constructs machine cutter head wearing and tearing on-line measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109990750B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202008014742U1 (en) * | 2008-11-06 | 2009-02-26 | Buczek, Marian | Device for measuring tool lengths |
| US20100122567A1 (en) * | 2008-11-14 | 2010-05-20 | Linares Medical Devices, Llc | Abrasive wear testing machine with cycle programmability and variable force application |
| CN201540105U (en) * | 2009-09-29 | 2010-08-04 | 中铁隧道集团二处有限公司 | Tool-wear monitoring device for shield machine |
| CN104634224A (en) * | 2014-12-22 | 2015-05-20 | 天津大学 | Highway pavement paving thickness plug-in automatic measuring device |
| CN105486216A (en) * | 2015-12-31 | 2016-04-13 | 中国铁建重工集团有限公司 | Shield-machine cutter wear detection device and shield-machine cutter system |
| CN205246036U (en) * | 2015-12-23 | 2016-05-18 | 东旭科技集团有限公司 | Glass size measuring device |
| CN106770503A (en) * | 2017-03-15 | 2017-05-31 | 中南大学 | A kind of cutter head panel wear detector of resistor network form |
| CN107014286A (en) * | 2017-04-19 | 2017-08-04 | 德阳六久科技有限公司 | A kind of measuring system for being used to measure deep hole perpendicularity |
| CN108489839A (en) * | 2018-05-29 | 2018-09-04 | 辽宁众森装备制造有限公司 | Packing wear condition monitoring device |
| CN108518237A (en) * | 2018-03-13 | 2018-09-11 | 中国矿业大学 | A method of according to the effective pass trip straightening drag conveyor of hydraulic support |
| CN208109042U (en) * | 2018-03-19 | 2018-11-16 | 中铁工程装备集团有限公司 | A kind of cutter head of shield machine panel hydraulic type wear detector |
| CN109405708A (en) * | 2018-12-28 | 2019-03-01 | 中国矿业大学(北京) | Cutter head of shield machine, tool wear measurement rotation ruler, measuring system and measurement method |
-
2019
- 2019-04-18 CN CN201910314467.6A patent/CN109990750B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202008014742U1 (en) * | 2008-11-06 | 2009-02-26 | Buczek, Marian | Device for measuring tool lengths |
| US20100122567A1 (en) * | 2008-11-14 | 2010-05-20 | Linares Medical Devices, Llc | Abrasive wear testing machine with cycle programmability and variable force application |
| CN201540105U (en) * | 2009-09-29 | 2010-08-04 | 中铁隧道集团二处有限公司 | Tool-wear monitoring device for shield machine |
| CN104634224A (en) * | 2014-12-22 | 2015-05-20 | 天津大学 | Highway pavement paving thickness plug-in automatic measuring device |
| CN205246036U (en) * | 2015-12-23 | 2016-05-18 | 东旭科技集团有限公司 | Glass size measuring device |
| CN105486216A (en) * | 2015-12-31 | 2016-04-13 | 中国铁建重工集团有限公司 | Shield-machine cutter wear detection device and shield-machine cutter system |
| CN106770503A (en) * | 2017-03-15 | 2017-05-31 | 中南大学 | A kind of cutter head panel wear detector of resistor network form |
| CN107014286A (en) * | 2017-04-19 | 2017-08-04 | 德阳六久科技有限公司 | A kind of measuring system for being used to measure deep hole perpendicularity |
| CN108518237A (en) * | 2018-03-13 | 2018-09-11 | 中国矿业大学 | A method of according to the effective pass trip straightening drag conveyor of hydraulic support |
| CN208109042U (en) * | 2018-03-19 | 2018-11-16 | 中铁工程装备集团有限公司 | A kind of cutter head of shield machine panel hydraulic type wear detector |
| CN108489839A (en) * | 2018-05-29 | 2018-09-04 | 辽宁众森装备制造有限公司 | Packing wear condition monitoring device |
| CN109405708A (en) * | 2018-12-28 | 2019-03-01 | 中国矿业大学(北京) | Cutter head of shield machine, tool wear measurement rotation ruler, measuring system and measurement method |
Non-Patent Citations (1)
| Title |
|---|
| 宋立业等: "基于RBF神经网络的隧道掘进机推进自适应PID控制", 《中国机械工程》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109990750B (en) | 2020-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6647762B1 (en) | Detecting leaks in pipes | |
| JP2020091269A (en) | Delivery pipe leakage monitoring device and method | |
| EP0264148A1 (en) | Flow measurement and monitoring system for positive-displacement pumps and pumps equipped with this system | |
| NO341906B1 (en) | Deriving information about leaks from pipes | |
| CN116105819A (en) | Flowmeter with alarm function and use method thereof | |
| CN111734428B (en) | Over-excavation measuring device | |
| US5520053A (en) | Ultrasound testing device for gas pressure accumulators | |
| CN109990750A (en) | A kind of cutter head of shield machine abrasion on-line measurement device | |
| CN110006384A (en) | A kind of cutter head of shield machine abrasion On-line Measuring Method | |
| KR101944690B1 (en) | A monitoring system of water supply pipeline equipped with judgement function of cause of problem | |
| KR101965690B1 (en) | A monitoring system of water supply pipeline | |
| CN217082219U (en) | Pipeline damage detection system based on distributed sound wave sensing | |
| CN113406205B (en) | Pipeline damage detection device and pipeline damage detection method | |
| CN107102067B (en) | Ultrasonic examination sensor with weak rigid measuring head | |
| CN202403683U (en) | Device for monitoring displacement of over cuter of shield machine | |
| CN209892202U (en) | Novel tail shield waterproof sealing system | |
| CN217466132U (en) | Pressure pipeline leakage detection device | |
| JP2005265663A (en) | Underground pipe and method of locating leakage position | |
| CN106990441B (en) | Rock tunnel(ling) machine carries the flexible monitoring and protecting system of induced polarization forward probe electrode | |
| CN113701061A (en) | Pipeline leakage detection method, detection system and construction method | |
| JP2001090900A (en) | Method and device for detecting position of foreign matter in liquid transporting pipeline | |
| CN207598624U (en) | A kind of oil cylinder | |
| EP3855151A1 (en) | Fluid leakage diagnosis device, fluid leakage diagnosis system, fluid leakage diagnosis method, and recording medium storing fluid leakage diagnosis program | |
| CN114923641A (en) | Pressure pipeline leakage detection device and using method | |
| KR20030035584A (en) | Measuring Apparatus and The Method for A Bubble in A Water Pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Bing Inventor after: Zhou Zhenjian Inventor after: Kong Shaobo Inventor after: Zhang Lianghui Inventor after: Han Weifeng Inventor after: Chen Qiao Inventor after: Yang Yandong Inventor after: Qin Yinping Inventor after: Gao Huizhong Inventor after: Ren Yingying Inventor before: Zhang Bing Inventor before: Han Weifeng Inventor before: Chen Qiao Inventor before: Yang Yandong Inventor before: Qin Yinping Inventor before: Gao Huizhong Inventor before: Ren Yingying Inventor before: Zhou Zhenjian |