CN108286438B - Device and method for monitoring stress of hob of normal-pressure tool changing cutterhead in real time - Google Patents
Device and method for monitoring stress of hob of normal-pressure tool changing cutterhead in real time Download PDFInfo
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- CN108286438B CN108286438B CN201810101130.2A CN201810101130A CN108286438B CN 108286438 B CN108286438 B CN 108286438B CN 201810101130 A CN201810101130 A CN 201810101130A CN 108286438 B CN108286438 B CN 108286438B
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- hob
- tool changing
- pressure tool
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000012806 monitoring device Methods 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims abstract description 12
- 230000003750 conditioning effect Effects 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000011435 rock Substances 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 5
- 230000005641 tunneling Effects 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 8
- 238000009412 basement excavation Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/093—Control of the driving shield, e.g. of the hydraulic advancing cylinders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0061—Force sensors associated with industrial machines or actuators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a real-time monitoring device and a monitoring method for the stress of a hob of a normal-pressure tool changing cutterhead, which can infer geological information of the excavation surface of a shield machine according to the stress of the hob, so that the tunneling parameters of the shield machine are adjusted, overload and severe vibration of the hob are avoided, the service life of the hob is prolonged, the shield tunneling efficiency is improved, and the construction cost is reduced; including the barrel, the left end of barrel inner wall is provided with the blade holder, is provided with the hobbing cutter in the blade holder, and the right-hand member of barrel inner wall is provided with the end cover, and welding seat and ordinary pressure tool changing device have been set gradually from left to right in the outside of barrel, and welding seat and ordinary pressure tool changing device are detachable to be linked firmly, and bolted connection is passed through to the bottom flange of ordinary pressure tool changing device and barrel, and the bolt passes through the wire and connects signal conditioning module, and signal conditioning module connects PLC, PLC connection monitoring computer.
Description
Technical Field
The invention relates to the technical field of equipment monitoring in the shield tunneling machine industry, in particular to a device and a method for monitoring the stress of a hob of a normal-pressure tool changing cutterhead in real time.
Background
The normal pressure tool changing cutterhead can realize normal pressure tool changing in high water pressure stratum shield construction, and the characteristics of safety and high efficiency of tool changing enable the application of the normal pressure tool changing cutterhead to be gradually and widely used. Tens of hobs are arranged on the normal-pressure cutter changing cutterhead, and the tunneling parameters of the shield machine cannot be adjusted in time because the sufficient geological information of a construction stratum cannot be obtained in shield construction, so that the hobs are excessively loaded and vibrate violently. The damage of structural members of the hob can be caused by overlarge hob load, and the severe vibration of the hob can loosen hob connecting pieces, so that the fatigue of parts is accelerated, and the hob lubricating oil is leaked.
Disclosure of Invention
The invention provides a real-time monitoring device and a monitoring method for the stress of a hob of a normal-pressure tool changing cutterhead, which can infer geological information of the excavation surface of a shield machine according to the stress of the hob, so that the tunneling parameters of the shield machine are adjusted, overload and severe vibration of the hob are avoided, the service life of the hob is prolonged, the shield tunneling efficiency is improved, and the construction cost is reduced.
The technical scheme of the invention is realized as follows:
the utility model provides a normal pressure tool changing blade disc hobbing cutter atress real-time supervision device, includes the barrel, and the left end of barrel inner wall is provided with the blade holder, is provided with the hobbing cutter in the blade holder, and the right-hand member of barrel inner wall is provided with the end cover, and the outside of barrel has set gradually welded seat and normal pressure tool changing device from left to right, and welded seat and normal pressure tool changing device are removable to be linked firmly, and the bottom flange of normal pressure tool changing device and barrel passes through bolted connection, and the signal conditioning module is connected through the wire to the bolt, and PLC is connected to the signal conditioning module, and the control computer is connected to the PLC.
The bolts are uniformly distributed with 24 bolts along the bottom flange of the cylinder body, the bolts comprise 4 force measuring bolts with wires arranged in the bolts at equal intervals, and the force measuring bolts are connected with the signal conditioning module through the wires.
The outside welding of welded seat is on the blade disc panel, and the left end of welded seat wears out the blade disc panel.
The cutter holder is connected with the hob through bolts.
A monitoring method of a real-time monitoring device for the stress of a hob of a normal-pressure tool changing cutterhead comprises the following steps:
(1) Setting the pressure applied by the hob along the axial direction of the cylinder body as F when the hob breaks rock and soil 1 Setting the water pressure of the cylinder body in the high water pressure stratum as F 2 ，F 2 Can be obtained from the effective pressure-receiving area S of the cylinder body and the pressure P measured by the water pressure sensor, in particular F 2 P.S, set the mole to which the cylinder is subjectedThe wiping force is F 3 Setting the supporting force of the flange at the bottom of the cylinder body to be F under the action of bolts 4 ；
(2) Setting the force measured by the ith (i=1, 2,3, 4) force measuring bolt as F ai The tensile force of the normal pressure tool changing device is F bi ，F ai ＝F bi The initial pretightening force is F ci Residual pretightening force is F ei The working tension is F di Setting the rigidity of the force measuring bolt as C b The rigidity of the cutter cylinder flange is C m ；
(3) Deducing the axial stress F of the hob according to a stress balance formula of the force measuring bolt 1 Is a variation of (c).
F can be obtained according to the axial stress balance of the cutter cylinder in the step (1) 3 +F 4 ＝F 1 +F 2 The average working tension of 24 bolts is taken as the working tension of 4 force measuring bolts, and the working tension of the force measuring bolts can be obtained
The step (2) is obtained according to the stress balance of the force measuring bolt
F ei +F di ＝F ai Thereby get->
Namely F 1 Is measured by the force measuring bolt ai Is changed by a change in (a).
According to the invention, the stress of the hob of the normal-pressure tool changing cutterhead is monitored, so that the soft and hard distribution condition of rock and soil on the whole excavation surface of the cutterhead is obtained, more sufficient geological information is provided for shield tunneling construction, and a basis is provided for timely adjusting shield tunneling parameters, so that the shield tunneling efficiency is improved; the invention can reduce the consumption of the hob in the shield construction, reduce the times of changing the hob, and reduce the construction cost while improving the shield tunneling efficiency.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the distribution of bolts on the bottom flange of the cylinder;
FIG. 3 is a schematic view of the force of the load bolts on the cylinder;
FIG. 4 is a schematic view of the forces exerted on the cylinder when the high water pressure formation hob is in contact with the rock and soil;
fig. 5 is a schematic diagram of a signal transmission flow of the hob stress monitoring device.
In the figure: 1-cylinder, 102-hob, 103-tool apron, 104-end cover, 2-welding seat, 3-cutterhead panel, 4-normal pressure tool changing device and 5-force measuring bolt.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-5, the embodiment of the invention provides a real-time monitoring device for the stress of a hob of an atmospheric pressure tool changing cutterhead, which comprises a barrel 1, wherein a hob holder 103 is arranged at the left end of the inner wall of the barrel 1, a hob 102 is arranged in the hob holder 103, an end cover 104 is arranged at the right end of the inner wall of the barrel 1, a welding seat 2 and an atmospheric pressure tool changing device 4 are sequentially arranged on the outer side of the barrel 1 from left to right, the welding seat 2 and the atmospheric pressure tool changing device 4 are detachably and fixedly connected, the atmospheric pressure tool changing device 4 and a bottom flange of the barrel 1 are connected through bolts, the bolts are connected with a signal conditioning module through wires, and the signal conditioning module is connected with a PLC (programmable logic controller) which is connected with a monitoring computer.
The bolts are uniformly distributed with 24 bolts along the bottom flange of the cylinder body, each bolt comprises 4 bolts 5 with wires arranged in the bolts at equal intervals, and the bolts 5 are connected with the signal conditioning module through the wires.
The outside of the welding seat 2 is welded on the cutterhead panel 3, and the left end of the welding seat 2 penetrates out of the cutterhead panel 3.
The cutter holder 103 and the hob 102 are connected through bolts.
A monitoring method of a real-time monitoring device for the stress of a hob of a normal-pressure tool changing cutterhead comprises the following steps:
(1) Setting the pressure applied by the hob along the axial direction of the cylinder body 1 as F when the hob breaks rock and soil 1 Setting the water pressure of the cylinder 1 in the high water pressure stratum as F 2 ，F 2 Can be obtained from the effective pressure-receiving area S of the cylinder 1 and the pressure P measured by the water pressure sensor, in particular F 2 Let p·s be the friction force received by the cylinder 1F 3 Setting the supporting force of the bottom flange of the cylinder body 1 to be F under the action of bolts 4 ；
(2) Setting the force measured by the ith (i=1, 2,3, 4) force measuring bolt as Fai, the tensile force received by the normal pressure tool changing device as Fbi, fai =fbi, the initial pre-tightening force as Fci, the residual pre-tightening force as Fei, the working tensile force as Fdi and the rigidity of the force measuring bolt as C b The rigidity of the cutter barrel flange is Cm;
(3) Deducing the axial stress F of the hob according to a stress balance formula of the force measuring bolt 1 Is a variation of (c).
In the step (1), F3+F can be obtained according to the axial stress balance of the cutter cylinder 4 ＝F 1 +F 2 The average working tension of 24 bolts is taken as the working tension of 4 force measuring bolts, and the working tension of the force measuring bolts can be obtained
The step (2) is obtained according to the stress balance of the force measuring bolt
F ei +F di ＝F ai Thereby get->
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The utility model provides a normal pressure tool changing blade disc hobbing cutter atress real-time supervision device, includes barrel (1), its characterized in that: the left end of barrel (1) inner wall is provided with blade holder (103), be provided with hobbing cutter (102) in blade holder (103), the right-hand member of barrel (1) inner wall is provided with end cover (104), welding seat (2) and ordinary pressure tool changing device (4) have been set gradually from left to right in the outside of barrel (1), welding seat (2) and ordinary pressure tool changing device (4) are detachable to link firmly, the bottom flange of ordinary pressure tool changing device (4) and barrel (1) passes through bolted connection, the bolt passes through the wire and connects signal conditioning module, signal conditioning module connects PLC, PLC connects the supervisory control computer.
2. The real-time monitoring device for stress of the hob of the normal-pressure tool changing cutterhead according to claim 1, wherein the device is characterized in that: the bolts are uniformly distributed with 24 bolts along the bottom flange of the cylinder body, each bolt comprises 4 force measuring bolts (5) with wires arranged in the bolts at equal intervals, and the force measuring bolts (5) are connected with the signal conditioning module through the wires.
3. The real-time monitoring device for stress of the hob of the normal-pressure tool changing cutterhead according to claim 1, wherein the device is characterized in that: the outside of the welding seat (2) is welded on the cutterhead panel (3), and one end of the welding seat (2) penetrates out of the cutterhead panel (3).
4. The real-time monitoring device for stress of the hob of the normal-pressure tool changing cutterhead according to claim 1, wherein the device is characterized in that: the cutter holder (103) and the hob (102) are connected through bolts.
5. A method for monitoring the stress of a hob of an atmospheric pressure tool changing cutterhead in real time according to claim 1, which is characterized by comprising the following steps:
(1) Setting the pressure applied along the axial direction of the cylinder body (1) as F when the hob breaks rock and soil 1 Setting the water pressure of the cylinder (1) in the high water pressure stratum as F 2 ，F 2 Can be obtained from the effective pressure area S of the cylinder (1) and the pressure P measured by the water pressure sensor, in particular F 2 Let P.S be F, the friction force received by the cylinder (1) 3 Setting the supporting force of the bottom flange of the cylinder (1) to be F by bolts 4 ；
(2) Setting the force measured by the ith (i=1, 2,3, 4) force measuring bolt as F ai The tensile force of the normal pressure tool changing device is F bi ，F ai ＝F bi The initial pretightening force is F ci Residual pretightening force is F ei The working tension is F di Setting the rigidity of the force measuring bolt as C b The rigidity of the cutter cylinder flange is C m ；
(3) Deducing the axial stress F of the hob according to a stress balance formula of the force measuring bolt 1 Is a variation of (c).
6. The monitoring method of the constant pressure tool changing cutter head hob stress real-time monitoring device is characterized by comprising the following steps of: in the step (1), the axial stress balance of the cutter cylinder is realizedObtainable F 3 +F 4 ＝F 1 +F 2 The average working tension of 24 bolts is taken as the working tension of 4 force measuring bolts, and the working tension of the force measuring bolts can be obtained
7. The monitoring method of the constant pressure tool changing cutterhead hob stress real-time monitoring device according to claim 5 or 6, wherein the monitoring method comprises the following steps: the step (2) is obtained according to the stress balance of the force measuring bolt
F ei +F di ＝F bi Thereby get->
Namely F 1 Is measured by the force measuring bolt ai Is changed by a change in (a). />
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810101130.2A CN108286438B (en) | 2018-02-01 | 2018-02-01 | Device and method for monitoring stress of hob of normal-pressure tool changing cutterhead in real time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810101130.2A CN108286438B (en) | 2018-02-01 | 2018-02-01 | Device and method for monitoring stress of hob of normal-pressure tool changing cutterhead in real time |
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| Publication Number | Publication Date |
|---|---|
| CN108286438A CN108286438A (en) | 2018-07-17 |
| CN108286438B true CN108286438B (en) | 2023-04-28 |
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| CN201810101130.2A Active CN108286438B (en) | 2018-02-01 | 2018-02-01 | Device and method for monitoring stress of hob of normal-pressure tool changing cutterhead in real time |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109057814A (en) * | 2018-10-08 | 2018-12-21 | 中铁隧道局集团有限公司 | A kind of disk cutter force measuring structure |
| CN109738172B (en) * | 2018-12-28 | 2023-11-14 | 英诺威阀业有限公司 | Wear monitoring device of normal pressure tool changing device |
| CN110159286B (en) * | 2019-06-24 | 2024-03-12 | 中铁工程装备集团有限公司 | Cutter head hob turning tool and cutter turning method |
| CN110331985A (en) * | 2019-07-30 | 2019-10-15 | 中铁工程装备集团有限公司 | Normal pressure cutter knife cylinder retracts extremely detects preventing mean and detection prevention method |
| CN110985023A (en) * | 2019-12-30 | 2020-04-10 | 中铁工程装备集团有限公司 | Cutter head unbalance loading detection device and detection method thereof |
| DE102022124534A1 (en) * | 2022-09-23 | 2024-03-28 | Herrenknecht Aktiengesellschaft | Tunnel boring machine |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003087537A1 (en) * | 2002-04-17 | 2003-10-23 | Starloy Corporation | Disk roller cutter and disk roller cutter monitoring system |
| CN1818640A (en) * | 2006-03-03 | 2006-08-16 | 广州市盾建地下工程有限公司 | Cutter wear inspection during tunnelling process of tunnel tunneller |
| CN103148771A (en) * | 2013-02-27 | 2013-06-12 | 中南大学 | Real-time tunnel boring machine (TBM) hob abrasion monitoring device |
| CN103234903A (en) * | 2013-04-01 | 2013-08-07 | 天津大学 | TBM hob abrasion detection device |
| CN104792369A (en) * | 2015-04-30 | 2015-07-22 | 中铁工程装备集团有限公司 | Wireless detecting device for rotating speed and abrasion of hobbing cutter of shield machine |
| CN105352420A (en) * | 2015-11-09 | 2016-02-24 | 武汉大学 | TBM hobbing cutter wear online real-time monitoring device and monitoring method |
| CN106370333A (en) * | 2016-09-21 | 2017-02-01 | 武汉大学 | TBM hobbing cutter stress online real-time monitoring apparatus and monitoring method |
| CN106555594A (en) * | 2016-12-05 | 2017-04-05 | 中铁工程装备集团有限公司 | A kind of normal pressure tool changing cutterhead |
| CN206132290U (en) * | 2016-10-31 | 2017-04-26 | 中铁工程装备集团有限公司 | Shield constructs quick -witted hobbing cutter measuring force device |
| CN207829897U (en) * | 2018-02-01 | 2018-09-07 | 中铁工程装备集团有限公司 | A kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device |
-
2018
- 2018-02-01 CN CN201810101130.2A patent/CN108286438B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003087537A1 (en) * | 2002-04-17 | 2003-10-23 | Starloy Corporation | Disk roller cutter and disk roller cutter monitoring system |
| CN1818640A (en) * | 2006-03-03 | 2006-08-16 | 广州市盾建地下工程有限公司 | Cutter wear inspection during tunnelling process of tunnel tunneller |
| CN103148771A (en) * | 2013-02-27 | 2013-06-12 | 中南大学 | Real-time tunnel boring machine (TBM) hob abrasion monitoring device |
| CN103234903A (en) * | 2013-04-01 | 2013-08-07 | 天津大学 | TBM hob abrasion detection device |
| CN104792369A (en) * | 2015-04-30 | 2015-07-22 | 中铁工程装备集团有限公司 | Wireless detecting device for rotating speed and abrasion of hobbing cutter of shield machine |
| CN105352420A (en) * | 2015-11-09 | 2016-02-24 | 武汉大学 | TBM hobbing cutter wear online real-time monitoring device and monitoring method |
| CN106370333A (en) * | 2016-09-21 | 2017-02-01 | 武汉大学 | TBM hobbing cutter stress online real-time monitoring apparatus and monitoring method |
| CN206132290U (en) * | 2016-10-31 | 2017-04-26 | 中铁工程装备集团有限公司 | Shield constructs quick -witted hobbing cutter measuring force device |
| CN106555594A (en) * | 2016-12-05 | 2017-04-05 | 中铁工程装备集团有限公司 | A kind of normal pressure tool changing cutterhead |
| CN207829897U (en) * | 2018-02-01 | 2018-09-07 | 中铁工程装备集团有限公司 | A kind of normal pressure tool changing cutterhead hobboing cutter stress real-time monitoring device |
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| CN108286438A (en) | 2018-07-17 |
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