CN109990750B - Shield constructs machine cutter head wearing and tearing on-line measuring device - Google Patents
Shield constructs machine cutter head wearing and tearing on-line measuring device Download PDFInfo
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- CN109990750B CN109990750B CN201910314467.6A CN201910314467A CN109990750B CN 109990750 B CN109990750 B CN 109990750B CN 201910314467 A CN201910314467 A CN 201910314467A CN 109990750 B CN109990750 B CN 109990750B
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- hydraulic oil
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides an on-line measuring device for wear of a cutter head of a shield machine, which can realize on-line measurement by utilizing foam holes on the cutter head of the existing shield machine and through a hydraulic oil cylinder, a pressure sensor and a displacement sensor, reduce pressure construction of personnel, has simple measuring device, is convenient to master the wear loss of a cutter at any time and avoids delay of construction period.
Description
Technical Field
The invention belongs to a cutter head abrasion online measuring device, and particularly relates to a shield tunneling machine cutter head abrasion online measuring device.
Background
With the wide use of shield tunneling machines in China and the continuous extension of the tunnel length of single tunneling, cutter abrasion becomes a key problem affecting the quality and progress of the project. The cutter head is used as an important part of the shield machine, the service condition of the cutter is checked and maintained regularly and accurately mastered, and the method has important significance. The earth pressure balance shield method is a common shield method at present, in order to detect the abrasion condition of a cutter head and a cutter, under the condition, cutter head inspection and tool maintenance are carried out under a pressurization condition, operation under pressure is often needed, the process is extremely troublesome and dangerous, and a non-pressure operation mode is adopted, so that the process is very complicated, a large amount of time is spent, and the construction period is delayed.
In order to avoid the trouble of manual detection, currently, the method for monitoring the wear condition of the cutter in real time mainly includes: 1) hydraulic, when the tool is worn to the limit, hydraulic oil leaks, and a PLC automatically gives an alarm; 2) in the electromagnetic type, when the cutter is worn to the limit, a probe embedded in the cutter contacts the stratum, an electromagnetic circuit is disconnected, a receiver cannot receive an electromagnetic signal, and an alarm is started; 3) the ultrasonic type can monitor the abrasion loss of the cutter in real time and can master the abrasion condition of the cutter at any time. At that time, because the working environment of the shield machine is very severe, once the detection fails, a large amount of time is spent by adopting a manual detection mode, and the construction period is delayed.
Disclosure of Invention
The invention provides an on-line measuring method for cutter head abrasion of a shield machine, aiming at overcoming the defects in the prior art.
The invention provides an online measuring device for abrasion of a cutter head of a shield tunneling machine, which comprises a hydraulic oil cylinder and an oil pump, wherein the oil pump is used for supplying hydraulic oil to the hydraulic oil cylinder, the hydraulic oil cylinder comprises a shell and an expansion link, the expansion link extends out of the shell, a displacement sensor is arranged at the rear end part of the shell, a flange is arranged at the front part of the shell, the shell also comprises a sealing cylinder, the sealing cylinder is arranged at the front end of the flange, a plurality of foam holes are uniformly distributed on the cutter head, the diameter of the flange is greater than that of the foam holes, the diameter of the sealing cylinder is slightly smaller than that of the flange, a groove is formed in the outer peripheral side of the sealing cylinder, an inflatable sealing ring is fixedly arranged in the groove, and a pressure sensor is arranged on the oil pump; the online cutter head abrasion measuring device further comprises a display device, the display device is used for displaying real-time data detected by the pressure sensor and the displacement sensor, and under the initial state, namely the state that the telescopic rod does not extend out, the end part of the telescopic rod is parallel and level with the front end side of the sealing barrel, and the display device displays that the numerical value of the displacement sensor is 0.
Preferably, the diameter of the telescoping rods is less than the diameter of the foam cells.
Preferably, the extension speed of the hydraulic oil cylinder is controlled, so that the time from starting to contacting the excavated soil body is 3-5 minutes.
Preferably, an even number of foam holes are selected for measurement, and the even number of foam holes are uniformly distributed along the circumferential direction.
Preferably, a one-way valve is further connected in series on a pipeline from the oil pump to the hydraulic oil cylinder, and a safety valve is further connected in parallel on a pipeline from the oil pump to the hydraulic oil cylinder.
The invention has the following beneficial effects:
1. according to the invention, the foam holes on the cutter head of the existing shield machine are utilized, online measurement can be realized through the hydraulic oil cylinder, the pressure sensor and the displacement sensor, the pressure construction of personnel is reduced, the measuring device is simple, the abrasion loss of the cutter can be conveniently mastered at any time, and the delay of the construction period is avoided; meanwhile, the sealing barrel is additionally arranged at the front end of the hydraulic oil cylinder, so that the pressure leakage of a pressure bin for excavating a soil body can be avoided during measurement, the construction recovery speed during secondary construction can be greatly increased, and the construction efficiency is improved.
2. The invention utilizes the pressure sensor to detect the pressure change, realizes displacement measurement through the pressure change of the pressure sensor, is convenient to detect, ensures that the time from the start of the hydraulic oil cylinder to the contact with the excavated soil body is 3-5 minutes by controlling the extension speed of the oil cylinder, ensures enough time to ensure that the pressure sensor can generate the pressure change conveniently, and ensures the accuracy of the measurement result.
3. And an even number of foam holes are selected for measurement, the even number of foam holes are uniformly distributed along the circumferential direction, and the average value is calculated according to the measurement results of the even number of foam holes, so that the accuracy of the detection result is improved.
4. The flange is arranged at the front end part of the shell of the hydraulic oil cylinder, so that the hydraulic oil cylinder is convenient to position during testing, and the measurement accuracy is ensured.
Drawings
Fig. 1 is a front view of the cutterhead configuration of the present invention.
FIG. 2A is a side view of the cutter head of the present invention in schematic configuration;
fig. 2B is an enlarged partial view of a foam hole in a side view of a cutter head according to the present invention.
The reference numerals in the figures are respectively: 1-foam hole, 2-telescopic rod, 3-flange, 4-sealing cylinder, 5-inflatable sealing ring, 6-shell and 7-cutter head.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, a schematic diagram of a cutterhead is shown, in order to improve the performance of excavating soil, a plurality of foam holes 1 are uniformly distributed on the cutterhead 7, specifically, 6 foam holes are arranged in the embodiment, and the leading knives on the cutterhead are also uniformly distributed on the periphery of the cutterhead.
Referring to the attached figure 2, the online measuring device for the abrasion of the cutter head of the shield machine is shown, the measuring device comprises a hydraulic oil cylinder and an oil pump, the oil pump is used for providing hydraulic oil for the hydraulic oil cylinder, the hydraulic oil cylinder comprises a shell 6 and an expansion rod 2, the expansion rod 2 extends out of the shell 6, a displacement sensor is arranged at the rear end of the shell, a flange is arranged at the front part of the shell, the shell further comprises a sealing cylinder 4, the sealing cylinder is arranged at the front end of the flange 3, the diameter of the flange is larger than that of a foam hole, the diameter of the sealing cylinder is slightly smaller than that of the flange, a groove is formed in the outer peripheral side of the sealing cylinder, an inflatable sealing ring 5 is fixedly installed in the groove, and a pressure sensor is arranged on the oil pump and used for detecting the pressure of; the online cutter head wear measuring device further comprises a display device (not shown in the figure), the display device is used for displaying real-time data detected by the pressure sensor and the displacement sensor, the end portion of the telescopic rod is flush with the front end side of the sealing barrel in an initial state, namely in a state that the telescopic rod does not extend out, and the display device displays that the numerical value of the displacement sensor is 0.
The invention provides a measuring method of a shield tunneling machine cutter head abrasion online measuring device, which comprises the following steps:
A. an online measuring device for the abrasion of the cutter head is arranged, the measuring device comprises a hydraulic oil cylinder and an oil pump, the oil pump is used for providing hydraulic oil for the hydraulic oil cylinder, the hydraulic oil cylinder comprises a shell and a telescopic rod, the telescopic rod extends out of the shell, the rear end part of the shell is provided with a displacement sensor, the front part of the shell is provided with a flange, the shell also comprises a sealing cylinder, the sealing cylinder is arranged at the front end of the flange, the diameter of the flange is larger than that of the foam hole, the diameter of the sealing cylinder is slightly smaller than that of the flange, the length of the sealing cylinder is L1, that is, the length from the front end face of the flange to the front end face of the sealing cylinder is L1, a groove is arranged on the outer periphery of the sealing cylinder, an inflatable sealing ring is fixedly arranged in the groove, a pressure sensor is arranged on the oil pump, the hydraulic oil pump comprises a pressure sensor, a displacement sensor and a control unit, wherein the pressure sensor is used for detecting the pressure of hydraulic oil output by the oil pump, and the displacement sensor is used for detecting the displacement of the telescopic rod; the online cutter head wear measuring device further comprises a display device (not shown in the figure), the display device is used for displaying real-time data detected by the pressure sensor and the displacement sensor, and in an initial state, namely in a state that the telescopic rod is not extended, the end part of the telescopic rod is flush with the front end side of the sealing barrel, and at the moment, the display device displays that the numerical value of the displacement sensor is 0;
B. preparing online measurement, wherein a plurality of foam holes are uniformly distributed on a cutter disc, when a shield tunneling machine stops working, the thickness L2 of the cutter disc at the foam hole is measured at one side of the cutter disc far away from an excavated soil body, an online cutter disc abrasion measuring device is arranged perpendicular to the cutter disc, a sealing cylinder extends into the foam holes, a flange of the measuring device is abutted to the inner sides of the foam holes, and an inflating device is used for inflating an inflating sealing ring at the position shown in figure 2, so that the inflating sealing ring is abutted to the inner wall of the foam holes, and the pressure leakage at the excavated soil body side is avoided;
C. on-line measurement, a hydraulic oil cylinder is started to extend the telescopic rod out along the direction of a foam hole, the pressure detected by a pressure sensor is recorded in real time, before the telescopic rod contacts the excavated soil body, the pressure value detected by the pressure sensor is approximately constant pressure with small fluctuation or pressure with stable change, when the telescopic rod contacts the excavated soil body, the pressure value detected by the pressure sensor can be changed violently, the value of a displacement sensor at the moment is recorded as L3, and the cutter length of the cutter head is L = L1+ L3-L2;
D. and D, obtaining the abrasion loss of the cutter disc, repeating the steps B-C, measuring the cutter lengths of the cutter discs corresponding to the foam holes, obtaining an average value, namely the length of the cutter at the moment, and comparing the initial length of the cutter to obtain the abrasion loss of the cutter disc at the moment.
Wherein the diameter of the telescopic rod is smaller than that of the foam hole.
And in the step C, the extension speed of the hydraulic oil cylinder is controlled, so that the time from starting of the hydraulic oil cylinder to contacting with the excavated soil body is 3-5 minutes, and the pressure sensor can generate pressure change conveniently.
In the step D, preferably, two foam holes are selected for measurement, the two foam holes are spaced by 180 ° in the circumferential direction, and the average value is obtained according to the measurement results of the two foam holes, so that the accuracy of the detection result is improved.
In addition, a one-way valve is connected in series on a pipeline from the oil pump to the hydraulic oil cylinder to prevent oil from flowing backwards, and a safety valve is connected in parallel on the pipeline from the oil pump to the hydraulic oil cylinder to protect a hydraulic system.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. The measuring device comprises a hydraulic oil cylinder and an oil pump, wherein the oil pump is used for providing hydraulic oil for the hydraulic oil cylinder, the hydraulic oil cylinder comprises a shell and an expansion link, the expansion link extends out of the shell, a displacement sensor is arranged at the rear end part of the shell, a flange is arranged at the front part of the shell, the shell further comprises a sealing cylinder, the sealing cylinder is arranged at the front end of the flange, a plurality of foam holes are uniformly distributed in the cutter, the diameter of the flange is larger than that of the foam holes, the diameter of the sealing cylinder is slightly smaller than that of the flange, a groove is formed in the outer peripheral side of the sealing cylinder, and an inflatable sealing ring is fixedly arranged in the groove; the sealing cylinder and the inflatable sealing ring are positioned in the foam hole, and the telescopic rod penetrates through the sealing cylinder and extends out of the foam hole; the oil pump is provided with a pressure sensor, wherein the pressure sensor is used for detecting the pressure of hydraulic oil output by the oil pump, and the displacement sensor is used for detecting the displacement of the telescopic rod; the online cutter head abrasion measuring device further comprises a display device, the display device is used for displaying real-time data detected by the pressure sensor and the displacement sensor, and under the initial state, namely the state that the telescopic rod does not extend out, the end part of the telescopic rod is parallel and level with the front end side of the sealing barrel, and the display device displays that the numerical value of the displacement sensor is 0.
2. A measuring device according to claim 1, wherein the diameter of the telescopic rod is smaller than the diameter of the foam cells.
3. A measuring apparatus according to claim 1 wherein the extension rate of the hydraulic ram is controlled such that the time from actuation of the hydraulic ram to contact with the excavated earth is between 3 and 5 minutes.
4. The measuring device of claim 1, wherein an even number of foam cells are selected for measurement, the even number of foam cells being evenly distributed along the circumferential direction.
5. The measuring device of claim 1, wherein a check valve is connected in series to the pipeline from the oil pump to the hydraulic oil cylinder, and a safety valve is connected in parallel to the pipeline from the oil pump to the hydraulic oil cylinder.
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 |
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| Publication Number | Publication Date |
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| CN109990750A CN109990750A (en) | 2019-07-09 |
| CN109990750B true CN109990750B (en) | 2020-11-06 |
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Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202008014742U1 (en) * | 2008-11-06 | 2009-02-26 | Buczek, Marian | Device for measuring tool lengths |
| US8051699B2 (en) * | 2008-11-14 | 2011-11-08 | 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 |
| CN104634224B (en) * | 2014-12-22 | 2017-05-17 | 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 |
| CN105486216B (en) * | 2015-12-31 | 2018-07-10 | 中国铁建重工集团有限公司 | A kind of shield machine cutter abrasion 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 |
| CN108518237B (en) * | 2018-03-13 | 2019-05-21 | 中国矿业大学 | A method of effectively elapsing stroke straightening drag conveyor according to 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 |
| CN108489839B (en) * | 2018-05-29 | 2024-04-26 | 辽宁众森装备制造有限公司 | Packing wearing state monitoring device |
| CN109405708B (en) * | 2018-12-28 | 2023-12-15 | 中国矿业大学(北京) | Cutter head of shield machine, cutter abrasion measurement rotating ruler, measurement system and measurement method |
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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 |
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