CN109253711B - Method for detecting clamping position of spiral conveyor of earth pressure balance shield machine - Google Patents

Method for detecting clamping position of spiral conveyor of earth pressure balance shield machine Download PDF

Info

Publication number
CN109253711B
CN109253711B CN201811205809.2A CN201811205809A CN109253711B CN 109253711 B CN109253711 B CN 109253711B CN 201811205809 A CN201811205809 A CN 201811205809A CN 109253711 B CN109253711 B CN 109253711B
Authority
CN
China
Prior art keywords
strain
point
measuring points
spiral
screw conveyer
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.)
Active
Application number
CN201811205809.2A
Other languages
Chinese (zh)
Other versions
CN109253711A (en
Inventor
夏毅敏
傅杰
吴遁
刘玉江
杨妹
沈烽
李清友
林赉贶
陈阵
王洋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Central South University
Original Assignee
Central South University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Central South University filed Critical Central South University
Priority to CN201811205809.2A priority Critical patent/CN109253711B/en
Publication of CN109253711A publication Critical patent/CN109253711A/en
Application granted granted Critical
Publication of CN109253711B publication Critical patent/CN109253711B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • 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
    • G01B21/32—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 the deformation in a solid

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

The invention discloses a method for detecting a stuck position of a spiral conveyor of a soil pressure balance shield machine, and belongs to the technical field of detection of fault parts of spiral conveyors. The detection method comprises the following steps: selecting a strain measuring point on the outer wall of the cylinder body of the screw conveyor, and arranging a strain sensor after primary treatment; connecting each measuring point to a test instrument; carrying out forward and reverse rotation or telescopic operation on a blade of the screw conveyor, and collecting strain data under a limit working condition; and finding out the maximum value of the strain of the barrel of the screw conveyor by analyzing the change rule of each group of strain data, and finally determining the position of a dead point. The invention solves the problem that the position of the dead-stop point of the screw conveyor is difficult to accurately determine only by empirical judgment when the screw conveyor is stuck, improves the detection precision and efficiency, and simultaneously avoids the risks brought by observation, cleaning and blind operation for getting rid of the trouble.

Description

Method for detecting clamping position of spiral conveyor of earth pressure balance shield machine
Technical Field
The invention relates to detection of a jamming fault of a screw conveyer, in particular to a method for detecting a jamming position of the screw conveyer of an earth pressure balance shield machine.
Background
The earth pressure balance shield machine is mainly applied to excavation of urban subways or underground pipe gallery tunnels with softer rock stratums, excavated muck is conveyed by the screw conveyer behind the cutter head, and the slag discharging efficiency of the screw conveyer directly influences the construction efficiency of the shield machine. Because the state of the slag soil in the soil pressure cabin cannot be monitored in real time, rocks, iron blocks or other objects with larger diameters are likely to enter the screw conveyor, so that the screw conveyor is blocked. The observation port is installed on the screw conveyor, when the problem of blocking is caused, the slag soil near the observation port is cleaned generally by opening the observation port, and then the position of blocking is determined by visual observation. However, in the shield construction, it is necessary to keep the pressure in the earth pressure chamber constant, so as to avoid collapse due to unstable tunnel face and the risk of collapse, gushing and the like when the observation hole is opened. And the screw conveyer size is big, and the viewing aperture is less and the position is too dispersed, is difficult to observe the inside dregs state of whole screw conveyer after the clearance, and the dead concrete position of screw conveyer card is difficult to confirm accurately. At present, under the condition that the blocking position cannot be determined, the screw conveyor can only be used for escaping through forward and reverse rotation and telescopic action. The blind operation may lead to a long time consumption, difficulty in getting out of the trouble, serious influence on the construction progress, and even damage to the screw conveyer. Therefore, a more accurate stuck point detection method is urgently needed, and after the stuck position is determined, the trapped point can be removed in a targeted manner.
Disclosure of Invention
In order to solve the problem that when the screw conveyer of the existing earth pressure balance shield machine is stuck, the inner condition of the screw conveyer can be observed by naked eyes only through a cleaning observation port, and the stuck position is judged only by experience. This leads to inaccurate determination of the stuck position and difficulty in targeted escape operation of the screw conveyor. The invention provides a method for detecting a stuck position of a spiral conveyor based on a strain test, which is used for accurately determining the stuck position.
The technical scheme of the invention is as follows:
a method for detecting the position of a clamping point of a spiral conveyor comprises the following steps:
step 1, selecting measuring points on the outer wall of a cylinder of a spiral conveyor, wherein the measuring points are uniformly distributed on the outer wall of the cylinder of the spiral conveyor, the measuring points are uniformly spaced, and strain sensors are arranged at the measuring points after selection;
step 2, connecting the strain sensor of each measuring point into a testing instrument to prepare for starting strain time domain signal data acquisition;
step 3, starting the screw conveyor, performing forward rotation and reverse rotation operations on the blades of the screw conveyor, gradually loading the blades to a limit working condition, and simultaneously acquiring strain data;
and 4, taking the average value of the strain data of each measuring point as a strain value of each point, analyzing the change rule of the strain value, judging whether to find out the maximum strain value of the barrel of the screw conveyor, if not, repeating the steps 1-3, and if so, determining the blocking position according to the position of the maximum value point.
According to the technical scheme, the beneficial effects of the invention are as follows:
the existing screw conveyor dead point detection does not form a system and accurate detection mode, the screw conveyor is only judged by experience, cleaned and forcibly started to perform various actions to get rid of difficulties, the operation blindness is high, and the risk is high.
The invention solves the problem that the dead-locking position is difficult to determine by using a cleaning observation method. And testing the strain deformation of the screw conveyer cylinder under the limit working condition by adopting a screw conveyer cylinder outer wall strain testing mode to obtain the strain change rule of different positions of the cylinder under the limit working condition, and finally determining the specific position of the dead point. The invention provides an accurate and simple stuck position detection method, which improves the stuck fault detection and removal speed of the screw conveyer, further reduces the fault downtime of the shield machine and improves the excavation efficiency of the shield machine.
Drawings
FIG. 1 is a flow chart of a method for testing a stuck position of a screw conveyor.
FIG. 2 is a schematic view of a screw conveyor stuck position test.
Fig. 3 is a schematic diagram of the arrangement position of the strain sensors of the screw conveyor.
In the figure: 1. a screw conveyor barrel (cylinder); 2. a screw conveyor blade; 3. a strain sensor; 4. and (6) testing the instrument.
Detailed Description
The existing screw conveyor stuck point detection does not form a relatively accurate quantitative detection method, so that the stuck position is difficult to accurately and conveniently find, and the trapped position is pertinently removed. When larger foreign matters enter the screw conveyer, an acting point is formed between the screw conveyer blade, the foreign matters and the screw conveyer cylinder, so that the friction force between the screw conveyer blade or the foreign matters and the inner wall of the screw conveyer cylinder is increased. When the force reaches a certain magnitude, the blade of the screw conveyer cannot rotate, and then the jamming fault occurs. When a jamming fault occurs, the blade of the screw conveyer rotates forwards and backwards or stretches and retracts, the acting force of the point changes, and the barrel of the screw conveyer near the acting force point deforms. The deformation of the screw conveyor barrel near the clamping dead point is the largest, and the deformation is gradually reduced as the distance from the clamping dead point is farther. Therefore, the clamping position of the spiral conveyer can be determined by detecting and analyzing the strain change of the cylinder of the spiral conveyer and finding out the maximum strain point. According to the principle, the invention provides an accurate detection method for the dead point of the screw conveyor, and the specific implementation of the invention is described in detail below by combining the accompanying drawings, which specifically comprises the following steps:
1) measuring points are selected on the outer wall of the spiral conveyor cylinder 1, the measuring points are uniformly distributed on the outer wall of the spiral conveyor cylinder 1, 8 measuring points are selected according to the actual situation on site during testing, the measuring points are arranged at intervals of 45 degrees (the interval angle of the measuring points can be changed, and the measuring points are added or reduced), the measuring points are arranged in a mode shown in figure 2, one circle of measuring points around the outer wall of the spiral conveyor cylinder are set as a same group of measuring points, and the measuring points in each group are uniformly spaced. And after selection, performing surface treatment such as grinding and polishing on the measuring point, cleaning the surface of the measuring point by using alcohol, and then arranging a strain sensor.
2) Leading out a pin of the strain sensor by using a wire, connecting the strain sensor of each measuring point into a testing instrument, setting parameters of each acquisition channel, and preparing to start strain time domain signal data acquisition;
3) starting the screw conveyor, carrying out forward rotation and reverse rotation operations on the screw conveyor blade 2, gradually loading to a limit working condition, and acquiring strain data through a test instrument;
4) taking the average value of the strain data of each measuring point as the strain value of each point, and recording the actual strain of each measuring point in each group as Xij(where i is the number of groups and j is the test point number), the maximum value of the strain inevitably existing in each group of data is marked as Xi＝Max(Xij). Analyzing the variation trend of the maximum strain value of each group to obtain the maximum strain values (X) of three adjacent groups of measuring points from left to right1、X2、X3) For example, the following steps are carried out:
if X1>X2>X3Will continue to X1The strain test was performed on the left.
If X1<X2<X3Will continue to X3The right side was strain tested.
If X1<X2>X3Then it is said that the stuck point exists in X2And (3) if the maximum strain value of the cylinder of the screw conveyor needs to be determined more accurately near the test point, reducing the distance of the strain test, repeating the steps 1-3, further analyzing data to reduce the test range, finally finding out the maximum strain value point, and accurately judging the blocking position.

Claims (3)

1. The method for detecting the stuck position of the spiral conveyor of the earth pressure balance shield machine is characterized in that strain test is carried out on the outer wall of a cylinder body of the spiral conveyor, the change rule of the maximum strain value of each group of measuring points is analyzed by rotating or stretching the blades of the spiral conveyor, the stuck position judgment range of the spiral conveyor is further narrowed, and the stuck position is finally determined;
selecting strain measuring points on the outer wall of a cylinder of the spiral conveyor, arranging the measuring points on the outer wall of the cylinder of the spiral conveyor, selecting 8 measuring points at intervals of 45 degrees or changing the interval angle of the measuring points during testing according to the actual situation on site, adding or reducing the measuring points, setting the measuring points around the outer wall of the cylinder of the spiral conveyor into a same group of measuring points, uniformly spacing the measuring points, and installing a sensor to each measuring point after selection;
taking the average value of the strain data of each measuring point as the strain value of each point, and recording the actual strain value of each measuring point in each group as XijWherein i is the number of groups, j is the test point number, the maximum value of the strain inevitably existing in each group of data is marked as Xi＝Max(Xij) Analyzing the variation trend of the maximum value of the strain of each group to obtain the maximum value X of the strain of three adjacent groups from left to right1、X2、X3For example, the following steps are carried out:
if X1>X2>X3Will continue to X1The strain test was carried out on the left side,
if X1<X2<X3Will continue to X3The right side was subjected to a strain test,
if X1<X2>X3Then it is said that the stuck location exists at X2And if the maximum strain value of the barrel of the screw conveyor needs to be determined more accurately near the test point, reducing the distance of the strain test, repeatedly performing the strain test, further analyzing data to reduce the test range, finally finding out the maximum strain value point and accurately judging the blocking position.
2. The method for detecting the stuck position of the screw conveyer of the earth pressure balance shield machine according to claim 1, wherein: when larger foreign matters enter the screw conveyer, an acting point is formed between the screw conveyer blade, the foreign matters and the screw conveyer cylinder, thereby causing the friction force between the spiral conveyer blade or the foreign matter and the inner wall of the cylinder body of the spiral conveyer to increase, when the force reaches a certain magnitude, the spiral conveyer blade can not rotate, further generating a jamming fault, and when the jamming fault occurs, the positive and negative rotation or the telescopic action is carried out on the blade of the screw conveyer, the acting force of the point will change and cause the barrel of the screw conveyer near the acting force point to generate deformation, the deformation of the barrel of the screw conveyer near the blocking position is the largest, the deformation is gradually reduced as the distance from the blocking position is farther, therefore, the clamping position of the spiral conveyer can be determined by detecting and analyzing the strain change of the cylinder of the spiral conveyer and finding out the maximum strain point.
3. The method for detecting the stuck position of the screw conveyer of the earth pressure balance shield machine according to claim 1, wherein the screw conveyer is started, the blades of the screw conveyer are operated in forward rotation and reverse rotation and are gradually loaded to a limit working condition, and a testing instrument is opened to collect strain data.
CN201811205809.2A 2018-10-17 2018-10-17 Method for detecting clamping position of spiral conveyor of earth pressure balance shield machine Active CN109253711B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811205809.2A CN109253711B (en) 2018-10-17 2018-10-17 Method for detecting clamping position of spiral conveyor of earth pressure balance shield machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811205809.2A CN109253711B (en) 2018-10-17 2018-10-17 Method for detecting clamping position of spiral conveyor of earth pressure balance shield machine

Publications (2)

Publication Number Publication Date
CN109253711A CN109253711A (en) 2019-01-22
CN109253711B true CN109253711B (en) 2020-07-10

Family

ID=65046402

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811205809.2A Active CN109253711B (en) 2018-10-17 2018-10-17 Method for detecting clamping position of spiral conveyor of earth pressure balance shield machine

Country Status (1)

Country Link
CN (1) CN109253711B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111636876B (en) * 2020-04-21 2021-09-07 中南大学 Method for detecting stress of key position of shield body of large-diameter shield machine
CN114922632B (en) * 2022-05-20 2023-05-12 中南大学 Method for detecting blocking reason and position of shield body of shield machine

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3717029A (en) * 1968-10-23 1973-02-20 Himmelstein & Co S Torquemeter
CN2055807U (en) * 1989-04-21 1990-04-11 柯宏林 Monitor for blockage trouble of spiral conveyer
CN101175970A (en) * 2005-04-15 2008-05-07 国际壳牌研究有限公司 Method of applying a strain sensor to a cylindrical structure
CN101397903A (en) * 2008-11-05 2009-04-01 大庆油田有限责任公司 Method for monitoring sleeve circumferential strain by using optical fibre grating sensor
CN101798933A (en) * 2010-04-13 2010-08-11 同济大学 Simulation test system for soil pressure balance shielding screw conveyer
CN101823634A (en) * 2009-11-12 2010-09-08 朱耀平 Anti-hardening, anti-freeze and anti-locking method and device for silo buried revolving spiral
CN102410912A (en) * 2011-08-24 2012-04-11 黑龙江大学 Intelligent detection sensor for spray nozzle blockage of full-automatic glue sprayer
CN202575323U (en) * 2012-04-27 2012-12-05 北京同欣长乐环保技术有限公司 Screw conveyer operation monitoring protection device
CN203767495U (en) * 2014-03-14 2014-08-13 神华集团有限责任公司 Screw conveyer and anti-blocking safety protecting device thereof
CN104596575A (en) * 2014-12-25 2015-05-06 新疆新能钢结构有限责任公司 Fan tower drum safe operation monitoring device and application method thereof
CN204324242U (en) * 2014-11-21 2015-05-13 广西鱼峰水泥股份有限公司 Conveyor screw antiseize device
CN106017401A (en) * 2016-06-13 2016-10-12 上海建工集团股份有限公司 Monitoring device and monitoring and judging method for obstruction of delivery pipe for superhighly pumping concrete
CN206002086U (en) * 2016-06-13 2017-03-08 上海建工集团股份有限公司 The monitoring device of ultra-high pump concrete conveying blockage
CN106840708A (en) * 2017-03-27 2017-06-13 重庆理工大学 Gear box casing deformation test method
CN107014556A (en) * 2017-05-16 2017-08-04 五邑大学 A kind of ultrasonic pressure measurement apparatus for shield conveying worm
CN107152284A (en) * 2017-06-09 2017-09-12 济南中铁重工轨道装备有限公司 A kind of screw conveyer of shield machine anti-lock structure
CN107727055A (en) * 2017-10-13 2018-02-23 河南理工大学 A kind of gas pumping tube lifetime detecting system based on foil gauge
CN108489376A (en) * 2018-03-13 2018-09-04 中国石油化工股份有限公司 A kind of Monitoring Pinpelines early warning system based on distributed coax cable electricity grid strain transducer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4764619B2 (en) * 2004-08-23 2011-09-07 株式会社エー・アンド・デイ Rotary component force measuring device

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3717029A (en) * 1968-10-23 1973-02-20 Himmelstein & Co S Torquemeter
CN2055807U (en) * 1989-04-21 1990-04-11 柯宏林 Monitor for blockage trouble of spiral conveyer
CN101175970A (en) * 2005-04-15 2008-05-07 国际壳牌研究有限公司 Method of applying a strain sensor to a cylindrical structure
CN101397903A (en) * 2008-11-05 2009-04-01 大庆油田有限责任公司 Method for monitoring sleeve circumferential strain by using optical fibre grating sensor
CN101823634A (en) * 2009-11-12 2010-09-08 朱耀平 Anti-hardening, anti-freeze and anti-locking method and device for silo buried revolving spiral
CN101798933A (en) * 2010-04-13 2010-08-11 同济大学 Simulation test system for soil pressure balance shielding screw conveyer
CN102410912A (en) * 2011-08-24 2012-04-11 黑龙江大学 Intelligent detection sensor for spray nozzle blockage of full-automatic glue sprayer
CN202575323U (en) * 2012-04-27 2012-12-05 北京同欣长乐环保技术有限公司 Screw conveyer operation monitoring protection device
CN203767495U (en) * 2014-03-14 2014-08-13 神华集团有限责任公司 Screw conveyer and anti-blocking safety protecting device thereof
CN204324242U (en) * 2014-11-21 2015-05-13 广西鱼峰水泥股份有限公司 Conveyor screw antiseize device
CN104596575A (en) * 2014-12-25 2015-05-06 新疆新能钢结构有限责任公司 Fan tower drum safe operation monitoring device and application method thereof
CN106017401A (en) * 2016-06-13 2016-10-12 上海建工集团股份有限公司 Monitoring device and monitoring and judging method for obstruction of delivery pipe for superhighly pumping concrete
CN206002086U (en) * 2016-06-13 2017-03-08 上海建工集团股份有限公司 The monitoring device of ultra-high pump concrete conveying blockage
CN106840708A (en) * 2017-03-27 2017-06-13 重庆理工大学 Gear box casing deformation test method
CN107014556A (en) * 2017-05-16 2017-08-04 五邑大学 A kind of ultrasonic pressure measurement apparatus for shield conveying worm
CN107152284A (en) * 2017-06-09 2017-09-12 济南中铁重工轨道装备有限公司 A kind of screw conveyer of shield machine anti-lock structure
CN107727055A (en) * 2017-10-13 2018-02-23 河南理工大学 A kind of gas pumping tube lifetime detecting system based on foil gauge
CN108489376A (en) * 2018-03-13 2018-09-04 中国石油化工股份有限公司 A kind of Monitoring Pinpelines early warning system based on distributed coax cable electricity grid strain transducer

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
富水砂卵石地层盾构刀盘卡死故障诊断及分析;刘玉江;《矿山机械》;20160731;第44卷(第7期);99-101 *
应变片测试方法在凿岩施工中的应用;何小平 等;《矿业研究与开发》;20140228;第34卷(第1期);102-104 *

Also Published As

Publication number Publication date
CN109253711A (en) 2019-01-22

Similar Documents

Publication Publication Date Title
EP2295705B1 (en) Abrasion detecting apparatus detecting abrasion of component of cutter head and tunnel boring machine including abrasion detecting apparatus
CN113779690B (en) Advanced geological prediction method and system based on while-drilling sensing
CN109253711B (en) Method for detecting clamping position of spiral conveyor of earth pressure balance shield machine
CN113390458B (en) Method for judging damage degree of surrounding rock in blasting area
CN110905402B (en) Pressure relief hole construction method based on mining induced stress dynamic monitoring
CN108710759B (en) Method for judging impact tendency by measuring softening modulus index of coal body on site
JP5819152B2 (en) Support layer arrival estimation method and support layer arrival estimation support device used in pile embedding method
JP2011038257A (en) Soil evaluation device and soil evaluation method
CN106837303B (en) Method for determining drilling depth in real time according to operation parameters of hydraulic drilling machine
JP3828615B2 (en) Cutter wear diagnosis method for tunnel excavator
JP2000104488A (en) Abrasion detecting method for roller bit
CN114352299A (en) Parallel advanced extra-deep geological prediction method under deep-buried long tunnel TBM (tunnel boring machine) construction condition
JP2012193592A (en) Forward natural ground evaluation method with water hammer
JP2017066652A (en) Excavation monitoring device and excavation state determination method
JP6887842B2 (en) Ground exploration method and penetration tester
CN109441470B (en) Method for testing surrounding rock resilience value of double-shield TBM tunneling tunnel
JP3267511B2 (en) TBM cutter monitoring method and monitoring device
Mooney et al. Influence of geological conditions on measured TBM vibration frequency
KR20130035756A (en) Capsule check system for check in tube
JP7316952B2 (en) Sediment fluidity determination method
JP2006124936A (en) Method and apparatus for performing survey on bedrock and the like
JP2873397B2 (en) Land Survey System
JP7079192B2 (en) Groundwater information acquisition method
JP2006124936A5 (en)
JP2004027702A (en) Ground condition monitoring method and device

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