CN202101909U - Anchor rod drawing force lossless dynamic detecting device - Google Patents
Anchor rod drawing force lossless dynamic detecting device Download PDFInfo
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- CN202101909U CN202101909U CN2011202350105U CN201120235010U CN202101909U CN 202101909 U CN202101909 U CN 202101909U CN 2011202350105 U CN2011202350105 U CN 2011202350105U CN 201120235010 U CN201120235010 U CN 201120235010U CN 202101909 U CN202101909 U CN 202101909U
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- anchor rod
- anchor pole
- drawing force
- anchor
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Abstract
The utility model discloses an anchor rod drawing force lossless dynamic detecting device, which comprises an anchor rod. The anchor rod is fixed in an anchor rod hole on a surrounding rock through an anchorage body; the exposed end of the anchor rod is provided with a supporting plate; the supporting plate is fixed on the surrounding rock through a locking nut; the exposed end of the anchor rod is provided with a connecting sleeve; a speed sensor is arranged in the connecting sleeve and is connected with a signal collecting analyzer through a signal transmission line; the end part of the connecting sleeve is provided with a sliding rod fixedly-connecting sleeve; the slide rod fixedly-connecting sleeve is connected with a sliding rod; an impacting seat is arranged at the tail part of the sliding rod; and the sliding rod is sheathed with a core penetrating hammer. The core penetrating hammer in transient fixed value shock excitation is elastically impacted with the impacting seat at the tail part of the sliding rod; the speed sensor is used for performing signal acquisition; and a signal is input into a signal acquisition analyzer and is converted into the drawing force of the anchor rod. The anchor rod drawing force lossless dynamic detecting device overcomes the defect that drawing force data cannot be directly read underground in the prior art. The anchor rod drawing force lossless dynamic detecting device is suitable for anchor rod drawing force detection, data calculation and data display in mines and tunnels.
Description
Technical field
The utility model relates to the anchor pole pulling capacity nondestructive power pick-up unit in a kind of mine and tunnel.
Background technology
Anchor pole is widely used in mine, tunnel surrounding reinforcing and the supporting; With the colliery is example; How accurately, all sidedly whether China's coal-mine roadway bolt consumption more than 5,000 ten thousand, calculate the anchor pole pulling capacity and meet design requirement at least, remains a difficult problem at present.In fact; For present deep coal mine roadway; Because heavily stressed, rock property difference of country rock and architectonic influence, all there is great difference in the anchor pole pulling capacity in same tunnel, and few part anchor pole pulling capacity does not reach the generation that requirement all will cause accidents such as the lane that collapses, roof fall.Therefore, respectively to carrying out the pulling capacity Non-Destructive Testing, in time grasp in labour anchor pole pulling capacity situation of change at the labour anchor pole at roadway construction and viability, obvious for the mine safety meaning.
Patent " a kind of lossless detection method of anchor rod ultimate bearing capacity " (CN1793897A) adopts the structure dynamic testing technology to obtain information; Adopt the intelligent signal analytical technology that the information of obtaining is handled, predict the detection method of anchor rod ultimate bearing capacity then through the neural network intelligent identifying system that has trained; This detection method can not intuitively read pulling capacity in the down-hole, and does not consider that prestress is to accurately reading the influence of pulling capacity.Patent " the nondestructive power pick-up unit and the method for anchor rod anchored limiting force " (CN101082564A); Be anchored in sensor installation coupling arrangement on coal (rock) the layer anchor shaft anchor cable exposed junction, and the acceleration transducer that links to each other with intelligent dynamic tester is being installed on the sensor coupling arrangement, through the positive end face of anchor pole is applied the power of shaking of hitting; Make anchor pole produce extensional vibration; Gather this little vibration acceleration signal by acceleration transducer, be transferred to intelligent dynamic tester, intelligent dynamic tester converts the acceleration signal that receives to digital signal and storage; At last all data that collect are input to computing machine and carry out calculation process, accomplish non-damaged detection of anchor rod anchored limiting force; This detection method can not intuitively read pulling capacity in the down-hole equally.At present the anchor pole pulling capacity being detected mainly is to utilize hydraulic jack to carry out the pulling capacity that pull-out test is measured anchor pole; This detection means is damaged the detection; Tested anchor pole generally can not be used further to supporting roof or two and help; Thereby can only can not reach the purpose of certain roadway bolt anchoring quality of assessment, and not only take a lot of work but also time-consuming as design reference in design.When anchoring quality is detected; Take only to pull to 80% of design anchoring limiting force; If can reach 80% of design anchoring limiting force, think that then this root anchor pole is qualified, the anchor pole after even now detects is reusable still; But still anchor pole and surrounding rock body thereof are produced stronger disturbance, reduced the reinforcement effect of anchor pole to country rock.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of anchor pole pulling capacity nondestructive power pick-up unit that the active service anchor pole detects that directly is used for.
The technical scheme that the utility model solves the problems of the technologies described above is: it comprises anchor pole; Anchor pole is in anchoring body is fixed on the bolthole on the country rock; The anchor pole exposed junction is provided with supporting plate, and supporting plate is fixed on the country rock through set nut, and the exposed junction of anchor pole is provided with adapter sleeve; Speed pickup is arranged in the adapter sleeve, and speed pickup connects signal gathering analysis meter through signal transmssion line; The end of said adapter sleeve is provided with the affixed cover of slide bar, and the affixed cover of slide bar connects slide bar, and the afterbody of slide bar is provided with the bump seat, suit punching hammer on the slide bar.
The utility model is compared the beneficial effect that prior art produces:
The utility model is taked the method for reverse exciting, produces the tension ripple and eliminates the interference of reflected wave of compression stress wave at supporting plate and country rock wall surface of contact; The speed pickup that selection meets prestressed anchor anchor system natural frequency comes direct acquisition system vibration velocity signal, with direct extraction system vibration initial velocity; The influence that energy loss is calculated pulling capacity when colliding for eliminating is calculated the energy loss that the coefficient of resilience is confirmed collision through punching hammer rebound height; Calculate prestressed anchor anchor system mass of vibration by system vibration initial velocity, punching hammer quality and collision coefficient at last, calculate the pulling capacity that detects anchor pole by the pulling capacity computing module that is solidificated in the signal sampler according to the system vibration fundamental frequency.The utility model does not have damage to the anchor pole of active service in the testing process of pulling capacity, do not have dismounting, and easy to detect, quick, and accuracy of detection is high; Signal sampler can directly calculate and show the computational data of pulling capacity.The utility model has overcome the defective that prior art can not intuitively not read the pulling capacity data in the down-hole.
The utility model is applicable to the detection of anchor pole pulling capacity, data computation and the demonstration in mine and tunnel.
Below in conjunction with accompanying drawing and embodiment the utility model is done further explain.
Description of drawings
Fig. 1 is the structural drawing of the utility model.
Among the figure: 1, country rock, 2, anchoring body, 3, anchor pole, 4, bolthole, 5, supporting plate, 6, set nut, 7, speed pickup, 8, signal transmssion line, 9, adapter sleeve, 10, the affixed cover of slide bar, 11, slide bar, 12, the punching hammer, 13, the bump seat.
Embodiment
Referring to Fig. 1, a kind of anchor pole pulling capacity nondestructive power pick-up unit, it comprises anchor pole 3; Anchor pole 3 is in anchoring body 2 is fixed on the bolthole 4 on the country rock 1; Anchor pole 3 exposed junctions are provided with supporting plate 5, and supporting plate 5 is fixed on the country rock 1 through set nut 6, and the exposed junction of anchor pole 3 is provided with adapter sleeve 9; Speed pickup 7 is arranged in the adapter sleeve 9, and speed pickup 7 connects signal gathering analysis meter 14 through signal transmssion line 8; The end of adapter sleeve 9 is provided with the affixed cover 10 of slide bar, and the affixed cover 10 of slide bar connects slide bar 11, and the afterbody of slide bar 11 is provided with bump seat 13, suit punching hammer 12 on the slide bar 11.
The detection step of the utility model comprises:
1), transient state definite value exciting: punching hammer 12 is with the actual relative movement to bump seat 13
HAlong slide bar 11 downward free landings, with the bump seat 13 generation elastic collisions of slide bar 11 afterbodys, thereby produce the longitudinal tension stress ripple in anchor pole 3 ends, cause prestressed anchor 3 extensional vibrations; Collision coefficient calculates according to punching hammer 12 collision back rebound height, and rebound height was calculated according to the mistiming of two exciting stress waves in the vibrational waveform.
With colliery prestressed anchor 3 is embodiment; Country rock 1 is a coal mine roadway top board surface of contact, and the prestress of anchor pole 3 generally is about 30～50kN, and anchor pole 3 is after anchoring body 2 is fixed; Make supporting plate 5 and surface of contact produce certain compressive stress; When carrying out the detection of anchor pole 3 power, usual method is to apply a transient state compression stress wave along anchor pole 3 longitudinal directions in anchor pole 3 ends, and compression stress wave will cause wave reflection and transmission when propagating into supporting plate 5 with rib surface of contact position; Become interference wave, accuracy of detection is affected.
The utility model is the tension ripple that longitudinally applies certain amplitude in anchor pole 3 ends; Because supporting plate 5 can not transmit the tension ripple with coal mine roadway top board surface of contact; Several inspiring confidence in of the tension ripple of exciting all imported anchored end into; Evoke anchoring body 2 extensional vibrations, supporting plate 5 is then not obvious basically with the interference wave of surface of contact.For realizing the tension ripple of coal mine roadway roofbolt 3, punching hammer 12 is with actual relative movement
HAlong the free from top to bottom landing of slide bar 11, with slide bar 11 afterbody semi-round balls bump seat 13 elastic collision taking place, thereby produces a longitudinal tension stress ripple in the end of anchor pole 3, trigger prestressed anchor 3 extensional vibrations.Collision coefficient calculates according to punching hammer 12 collision back rebound height, and rebound height can be calculated according to the mistiming of two exciting stress waves in the vibrational waveform.
2), signals collecting: speed pickup 7 is assemblied on the cover 9 that is threaded, and speed pickup 7 is gathered punching hammer 12 and clashed into the vibration velocity signal that elastic collision takes place seat 13, and this signal is sent to acquisition and analysis instrument 14 through signal transmssion line 8.
The main acceleration transducer that adopts during present existing anchor pole 3 detects; But employing acceleration transducer; Need acquired signal is carried out digital integration; Some interference waves are exaggerated in integral process, so this detection signal pick-up transducers directly adopts speed pickup 7, speed pickup 7 bandwidth are at 500Hz～2000Hz.Speed pickup 7 is assemblied on the cover 9 that is threaded of slide bar 11 exciting devices.
3), pulling capacity is calculated; After single anchor pole 3 rate signal collections finish, select one of them signal to carry out time-domain analysis, obtain anchor pole 3 free end length; Simultaneously according to known anchor pole 3 length computation anchorage lengths; Preceding 1～3 order frequency of this anchor pole 3 of Theoretical Calculation, and the prestressed anchor 3 vibrations intrinsic fundamental frequency of anchored end when being regarded as propping up admittedly, the theoretical fundamental vibration frequency of confirming prestressed anchor 3.Acquisition and analysis instrument 14 is provided with the pulling capacity computing module; The pulling capacity computing module carries out FFT to the vibration velocity signal and obtains power spectrum signal; And utilize extreme value theorem to confirm 1～3 preceding order frequency of prestressed anchor 3 vibrations; Compare with the theory of oscillation fundamental frequency of this prestressed anchor 3, prestressed anchor 3 fundamental vibration frequencies that obtain surveying are as the calculated rate value
f 0The vibration initial velocity and the collision coefficient that are comprehensively directly extracted by these anchor pole 3 vibration velocity signals then are by the pulling capacity of this prestressed anchor 3 of the calculating of the pulling capacity computing module in the signal sampler 14; The Mintrop wave crest peak value of tension waveform does
A d, by
v 0=
α*
A dConfirm the vibration initial velocity behind the vertical exciting of prestressed anchor, wherein
αBe the sensitivity coefficient of speed pickup 7,
tBe the mistiming of Mintrop wave on the waveform and resilience ripple.By formula h=g
t 2/ 8 calculate rebound height, and by formula
ε=h/
HCalculate the coefficient of resilience.Confirm comprehensive
f 0,
v 0,
εAfter, click " pulling capacity calculating " button on the acquisition and analysis instrument 14, calculate automatically and demonstration anchor pole 3 pulling capacity detected values by acquisition and analysis instrument 14.
Claims (1)
1. anchor pole pulling capacity nondestructive power pick-up unit; It is characterized in that: it comprises anchor pole (3); Anchor pole (3) is in anchoring body (2) is fixed on the bolthole (4) on the country rock (1); Anchor pole (3) exposed junction is provided with supporting plate (5), and supporting plate (5) is fixed on the country rock (1) through set nut (6), and the exposed junction of anchor pole (3) is provided with adapter sleeve (9); Speed pickup (7) is arranged in the adapter sleeve (9), and speed pickup (7) connects signal gathering analysis meter (14) through signal transmssion line (8); The end of said adapter sleeve (9) is provided with the affixed cover of slide bar (10), and the affixed cover of slide bar (10) connects slide bar (11), and the afterbody of slide bar (11) is provided with bump seat (13), and slide bar (11) is gone up suit punching hammer (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202350105U CN202101909U (en) | 2011-07-06 | 2011-07-06 | Anchor rod drawing force lossless dynamic detecting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202350105U CN202101909U (en) | 2011-07-06 | 2011-07-06 | Anchor rod drawing force lossless dynamic detecting device |
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| CN202101909U true CN202101909U (en) | 2012-01-04 |
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| CN2011202350105U Expired - Lifetime CN202101909U (en) | 2011-07-06 | 2011-07-06 | Anchor rod drawing force lossless dynamic detecting device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279135A (en) * | 2011-07-06 | 2011-12-14 | 湖南科技大学 | Lossless dynamic detection apparatus and method for anchor pile drawing force |
| CN102733835A (en) * | 2012-07-03 | 2012-10-17 | 四川伯源岩土工程有限公司 | Watery distension anchor rod, matching connecting joint and connection method of watery distension anchor rod |
| CN103234830A (en) * | 2013-05-23 | 2013-08-07 | 湖南科技大学 | Anchoring property experiment platform of anchor rod |
| WO2013143145A1 (en) * | 2012-03-31 | 2013-10-03 | 中国矿业大学(北京) | Dynamics performance testing system |
| CN104236837A (en) * | 2014-08-26 | 2014-12-24 | 尤洛卡（山东）深部地压防治安全技术有限公司 | Load impact experimental system and application method thereof |
| CN104697848A (en) * | 2015-02-10 | 2015-06-10 | 华北科技学院 | Novel mine anchor rod quality detection pulling device |
| CN105004615A (en) * | 2015-08-10 | 2015-10-28 | 河南理工大学 | Device with telescopic base for improving drawing testing effect of coal road anchor rod |
| CN105221172A (en) * | 2015-09-21 | 2016-01-06 | 中国矿业大学 | A kind of end-fixed bolter free segment real-time axle power nondestructive testing calibration system and method |
| CN106437803A (en) * | 2016-12-02 | 2017-02-22 | 大连理工大学 | Anchor rod and anchor rod stressing tester |
| CN107227968A (en) * | 2017-07-27 | 2017-10-03 | 贵州大学 | A kind of self-inspection anchor pole and its application method |
| CN109632482A (en) * | 2018-12-23 | 2019-04-16 | 东莞市建设工程检测中心 | A kind of building rod piece pullout tests grip device |
-
2011
- 2011-07-06 CN CN2011202350105U patent/CN202101909U/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102279135B (en) * | 2011-07-06 | 2012-12-26 | 湖南科技大学 | Lossless dynamic detection apparatus and method for anchor pile drawing force |
| CN102279135A (en) * | 2011-07-06 | 2011-12-14 | 湖南科技大学 | Lossless dynamic detection apparatus and method for anchor pile drawing force |
| US9588029B2 (en) | 2012-03-31 | 2017-03-07 | China University Of Mining & Technology (Beijing) | Dynamics performance testing system |
| EP2833119A4 (en) * | 2012-03-31 | 2015-12-09 | Univ China Mining | Dynamics performance testing system |
| WO2013143145A1 (en) * | 2012-03-31 | 2013-10-03 | 中国矿业大学(北京) | Dynamics performance testing system |
| CN102733835A (en) * | 2012-07-03 | 2012-10-17 | 四川伯源岩土工程有限公司 | Watery distension anchor rod, matching connecting joint and connection method of watery distension anchor rod |
| CN103234830B (en) * | 2013-05-23 | 2015-01-07 | 湖南科技大学 | Anchoring property experiment platform of anchor rod |
| CN103234830A (en) * | 2013-05-23 | 2013-08-07 | 湖南科技大学 | Anchoring property experiment platform of anchor rod |
| CN104236837A (en) * | 2014-08-26 | 2014-12-24 | 尤洛卡（山东）深部地压防治安全技术有限公司 | Load impact experimental system and application method thereof |
| CN104697848A (en) * | 2015-02-10 | 2015-06-10 | 华北科技学院 | Novel mine anchor rod quality detection pulling device |
| CN105004615A (en) * | 2015-08-10 | 2015-10-28 | 河南理工大学 | Device with telescopic base for improving drawing testing effect of coal road anchor rod |
| CN105221172A (en) * | 2015-09-21 | 2016-01-06 | 中国矿业大学 | A kind of end-fixed bolter free segment real-time axle power nondestructive testing calibration system and method |
| CN105221172B (en) * | 2015-09-21 | 2017-11-17 | 中国矿业大学 | A kind of real-time axle power Non-Destructive Testing calibration system of end-fixed bolter free segment and method |
| CN106437803A (en) * | 2016-12-02 | 2017-02-22 | 大连理工大学 | Anchor rod and anchor rod stressing tester |
| CN107227968A (en) * | 2017-07-27 | 2017-10-03 | 贵州大学 | A kind of self-inspection anchor pole and its application method |
| CN109632482A (en) * | 2018-12-23 | 2019-04-16 | 东莞市建设工程检测中心 | A kind of building rod piece pullout tests grip device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUNAN CHUXIANG CONSTRUCTION ENGINEERING CO., LTD. Free format text: FORMER OWNER: HUNAN SCI-TECH UNIV. Effective date: 20121026 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 411201 XIANGTAN, HUNAN PROVINCE TO: 410114 CHANGSHA, HUNAN PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20121026 Address after: 410114 Hunan province Changsha Tianxin District Xin Mei Road No. 102 Patentee after: Hunan Chu Xiang Construction Engineering Co., Ltd. Address before: 411201 Taoyuan Road, Xiangtan, Hunan Province Lake Road, No. 2 Patentee before: Hunan Sci-Tech Univ. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 410114 Hunan province Changsha Tianxin District Xin Mei Road No. 102 Patentee after: Hunan Chuxiang Construction Engineering Group Co., Ltd. Address before: 410114 Hunan province Changsha Tianxin District Xin Mei Road No. 102 Patentee before: Hunan Chu Xiang Construction Engineering Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120104 |
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| CX01 | Expiry of patent term |