CN102589513A - Drilling jumbo and drill rod deformation detection device thereof - Google Patents

Drilling jumbo and drill rod deformation detection device thereof Download PDF

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Publication number
CN102589513A
CN102589513A CN2012100318195A CN201210031819A CN102589513A CN 102589513 A CN102589513 A CN 102589513A CN 2012100318195 A CN2012100318195 A CN 2012100318195A CN 201210031819 A CN201210031819 A CN 201210031819A CN 102589513 A CN102589513 A CN 102589513A
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CN
China
Prior art keywords
drill steel
pressure
deformation
detecting
display
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Granted
Application number
CN2012100318195A
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Chinese (zh)
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CN102589513B (en
Inventor
王真
马洪秋
陈安涛
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Sany Heavy Industry Co Ltd
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Sany Heavy Industry Co Ltd
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Priority to CN201210031819.5A priority Critical patent/CN102589513B/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00Measuring arrangements or details thereof in so far as they are not adapted to particular types of measuring means of the preceding groups
    • G01B21/32Measuring arrangements or details thereof in so far as they are not adapted to particular types of measuring means of the preceding groups for measuring the deformation in a solid
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B44/00Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions

Abstract

The invention discloses a drill rod deformation detection device. The drill rod deformation detection device comprises a detection element, a control element and a display, wherein the detection element is used for detecting a parameter capable of reflecting a drill rod deformation degree in real time and transmitting a detected parameter signal to the control element; the control element is used for receiving the parameter signal, obtaining a parameter value matched with the current deformation degree of a drill rod according to a preset strategy, and transmitting the parameter value matched with the current deformation degree of the drill rod to the display; and the display outputs the parameter value matched with the current deformation degree of the drill rod. Therefore, in the process of operating the drill rod, a worker can judge the deformation degree of the drill rod by checking the parameter value output by the display, so that a basis is provided for judging the deformation degree of the drill rod, the deformation degree of the drill rod is accurately judged, and excessive deformation and breakage of the drill rod are avoided. The invention also discloses a drilling jumbo comprising the drill rod deformation detection device.

Description

A kind of drill jumbo and drill steel device for detecting deformation thereof
Technical field
The present invention relates to engineering machinery field, particularly a kind of drill steel device for detecting deformation of drill jumbo.The invention still further relates to a kind of drill jumbo that comprises above-mentioned drill steel device for detecting deformation.
Background technology
Along with the fast development of China's economic construction, market increases for the increasing demand of the especially various boring apparatuss of engineering machinery.
Drill jumbo is also claimed drilling jumbo, is a kind of typical rock drilling equipment in tunnel and the underground works drill bursting construction.Drill steel is an important component part in the drill jumbo; It is used to connect bore bit and bit shank; The power that bit shank is received gets into the shaft-like or tubular member of boring to the bore bit transmission and in company with bore bit, and drill steel passes from two fixture blocks of puncheon centralizing device, and the drill steel device is mainly used in fixedly drill steel; Drilling precision is guaranteed in the motion of guiding drill steel.In the course of work of drill jumbo, drill steel continues to receive the effect of external force as the power transmission part, causes the drill steel distortion, the serviceable life of drill steel deformation effect drill steel, even cause the drill steel fracture.The distortion of bigger drill steel not only can have influence on unloads the bar operation, also the cutting rate and the rock penetration performance of rock drilling car is had certain influence simultaneously, and is out of shape excessively, and roughly drill steel ruptures at work and not only can lose bore bit, also can cause useless hole, causes bigger economic loss.
In the course of work of reality, the staff judges the deformation extent of drill steel through range estimation, and selects to change suitable relatively opportunity drill steel.But, judge the deformation extent of drill steel through the mode of range estimation, can't carry out the quantification treatment of deformation extent, confirm replacing opportunity of drill steel simply by virtue of subjective judgement, the accuracy of judgement is relatively poor, can't avoid drill steel excessive deformation and fracture; And in order to reduce disconnected bar rate, the staff need often check the deformation extent of drill steel, and workload is bigger.
Therefore, how to realize the accurate judgement of drill steel deformation extent, avoid drill steel generation excessive deformation and fracture, reduce staff's labour intensity simultaneously, just become the problem that those skilled in the art need solve.
Summary of the invention
The drill steel device for detecting deformation that the purpose of this invention is to provide a kind of drill jumbo, it can provide foundation for judging the drill steel deformation extent, thereby realizes the accurate judgement of drill steel deformation extent, has avoided drill steel generation excessive deformation and fracture; Simultaneously, the staff need not often to check to the working site of drill steel its distortion situation, has reduced staff's workload.Another object of the present invention provides a kind of drill jumbo that comprises above-mentioned drill steel device for detecting deformation.
For solving the problems of the technologies described above, the present invention provides a kind of drill steel device for detecting deformation, comprises detecting element, control element and display;
Said detecting element is used for the parameter that real-time detection can reflect the drill steel deformation extent, and detected parameter signal is transferred to said control element;
Said control element is used to receive said parameter signal, obtain the parameter value that the current deformation extent with said drill steel is complementary according to predetermined policy, and the parameter value that will be complementary with the current deformation extent of said drill steel transfers to display;
The parameter value that the current deformation extent of said display output and said drill steel is complementary.
Preferably, said drill steel is fixed through the hydraulic pressure puncheon centralizing device, and said drill steel passes between two jig arm of said hydraulic pressure puncheon centralizing device.
Preferably, said detecting element is first pressure transducer, and said first pressure transducer detects in real time the pressure in the oil circuit of said hydraulic pressure puncheon centralizing device, and detected first pressure signal is transferred to said control element;
Said control element receives said first pressure signal, and said predetermined policy is that said control element filters out surge pressure, and the first steady pressure value that will obtain transfers to said display;
Said display is exported the said first steady pressure value.
Preferably, said first pressure transducer is installed on the oil circuit of oil cylinder bottom of said hydraulic pressure puncheon centralizing device.
Preferably, said detecting element is second pressure transducer, and said second pressure transducer detects in real time the pressure on the jig arm of said hydraulic pressure puncheon centralizing device, and detected second pressure signal is transferred to said control element;
Said control element receives said second pressure signal, and said predetermined policy is that said control element filters out surge pressure, and the second steady pressure value that will obtain transfers to said display;
Said display is exported the said second steady pressure value.
Preferably, said second pressure transducer is installed at least one jig arm of said hydraulic pressure puncheon centralizing device.
The present invention also provides a kind of drill jumbo, comprises the puncheon centralizing device of drill steel, fixing said drill steel, and the drill steel device for detecting deformation that detects said drill steel deformation extent, and said barral of a gun device for detecting deformation is aforesaid drill steel device for detecting deformation.
Drill steel device for detecting deformation provided by the present invention comprises detecting element, control element and display; Wherein, detecting element is used for the parameter that real-time detection can reflect the drill steel deformation extent, and detected parameter signal is transferred to control element; Control element is used to receive said parameter signal, obtain the parameter value that the current deformation extent with drill steel is complementary according to predetermined policy, and the parameter value that will be complementary with the current deformation extent of drill steel transfers to display; The parameter value that the current deformation extent of display output and drill steel is complementary.Like this; In the drill steel course of work, the parameter value that the current deformation extent of output in real time of this drill steel device for detecting deformation and drill steel is complementary, the staff is through checking the parameter value of display output; Promptly can judge the deformation extent of drill steel; Thereby for the deformation extent of judging drill steel provides foundation, realize the accurate judgement of drill steel deformation extent, avoided drill steel generation excessive deformation and fracture; Simultaneously, the staff only need check that display can learn the distortion situation of drill steel, and the scene that need not is checked, thereby reduced staff's workload.
A kind of preferred embodiment in, detecting element provided by the present invention is first pressure transducer, first pressure transducer detects the pressure in the oil circuit of hydraulic pressure puncheon centralizing device, and detected first pressure signal is transferred to said control element; Control element receives first pressure signal, and predetermined policy is that control element filters out surge pressure, and the first steady pressure value that will obtain transfers to said display; Display is exported the said first steady pressure value, and the staff changes the variation of the current deformation extent of judging drill steel based on this first steady pressure value, thereby judges the opportunity of changing drill steel.
When drill steel is gone up generation deformation in any direction; Drill steel can push the jig arm of hydraulic pressure puncheon centralizing device; Cause the jig arm pressure to change; The pressurized variation of jig arm is reacted directly on the oil circuit pressure, can react the whole pressured state of jig arm through the conduction back more exactly to the pressure in the oil circuit, thereby is to judge that the drill steel deformation extent provides reference comparatively accurately; Simultaneously,, can reduce impulsive force in the drill steel work to a certain extent, have the higher detection accuracy, and avoided the impact failure of detecting element, improve the serviceable life of detecting element the influence of detected pressure value through the buffering of oil circuit.
In another preferred embodiment, first pressure transducer provided by the present invention is installed on the oil circuit of oil cylinder bottom of said hydraulic pressure puncheon centralizing device, and the oil cylinder bottom is far away from drill steel, receives drill steel work impulsive force less, and detection accuracy is higher.
Description of drawings
Fig. 1 is the structured flowchart of drill steel device for detecting deformation provided by the present invention;
Fig. 2 is the structured flowchart of a kind of embodiment of drill steel device for detecting deformation provided by the present invention;
Fig. 3 is the structured flowchart of the another kind of embodiment of drill steel device for detecting deformation provided by the present invention.
Embodiment
Core of the present invention provides a kind of drill steel device for detecting deformation of drill jumbo, and it can provide foundation for judging the drill steel deformation extent, thereby realizes the accurate judgement of drill steel deformation extent, has avoided drill steel generation excessive deformation and fracture; Simultaneously, the staff need not often to check to the working site of drill steel its distortion situation, has reduced staff's workload.Another core of the present invention provides a kind of drill jumbo that comprises above-mentioned drill steel device for detecting deformation.
In order to make those skilled in the art person understand technical scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and embodiment.
Please refer to Fig. 1, Fig. 1 is the structured flowchart of drill steel device for detecting deformation provided by the present invention.
Drill steel device for detecting deformation provided by the present invention comprises detecting element 1, control element 2 and display 3; Wherein, detecting element 1 is used for the parameter that real-time detection can reflect the drill steel deformation extent, and detected parameter signal is transferred to control element 2; Control element 2 is used to receive parameter signal, obtain the parameter value that the current deformation extent with drill steel is complementary according to predetermined policy, and the parameter value that will be complementary with the current deformation extent of drill steel transfers to display 3; The parameter value that the current deformation extent of display 3 outputs and drill steel is complementary.
Theoretically; The parameter that can reflect the drill steel deformation extent can be the pressure in the oil circuit of the jig arm pressure of puncheon centralizing device or hydraulic pressure puncheon centralizing device; Also can be for having other parameters of certain relation with the drill steel deformation extent, for example, also can be for the deformation angle of drill steel crushed element etc.
The parameter value of display 3 outputs can be the parameter current value, also can be the variable quantity of parameter value.
Like this; In the drill steel course of work, the parameter value that the current deformation extent of output in real time of this drill steel device for detecting deformation and drill steel is complementary, the staff is through checking the parameter value of display 3 outputs; Promptly can judge the deformation extent of drill steel; Thereby for the deformation extent of judging drill steel provides foundation, realize the accurate judgement of drill steel deformation extent, avoided drill steel generation excessive deformation and fracture; Simultaneously, the staff only need check that display 3 can learn the distortion situation of drill steel, and the scene that need not is checked, thereby reduced staff's workload.
Please refer to Fig. 2, Fig. 2 is the structured flowchart of a kind of embodiment of drill steel device for detecting deformation provided by the present invention.
In a kind of embodiment, above-mentioned drill steel is fixed through the hydraulic pressure puncheon centralizing device, and said drill steel passes between two jig arm of hydraulic pressure puncheon centralizing device; In the process of boring, puncheon centralizing device is hit bigger, and the impact resistance of hydraulic pressure puncheon centralizing device is stronger.
Above-mentioned puncheon centralizing device also is not limited to the hydraulic pressure puncheon centralizing device, also can be the puncheon centralizing device of the conventional other types of using in this area, for example mechanical puncheon centralizing device etc.
When puncheon centralizing device was the hydraulic pressure puncheon centralizing device, above-mentioned detecting element was that first pressure transducer, 11, the first pressure transducers 11 detect the pressure in the oil circuit of said hydraulic pressure puncheon centralizing device in real time, and detected first pressure signal is transferred to said control element 2; Control element 2 receives first pressure signal, and said predetermined policy is that control element 2 filters out surge pressure, and the first steady pressure value that will obtain transfers to said display 3; The said first steady pressure value of said display 3 outputs.
When drill steel is gone up generation deformation in any direction; Drill steel can push the jig arm of hydraulic pressure puncheon centralizing device; Cause the jig arm pressure to change; The pressurized variation of jig arm is reacted directly on the oil circuit pressure, can react the whole pressured state of jig arm through the conduction back more exactly to the pressure in the oil circuit, thereby is to judge that the drill steel deformation extent provides reference comparatively accurately; Simultaneously,, can reduce impulsive force in the drill steel work to a certain extent, have the higher detection accuracy, and avoided the impact failure of detecting element, improve the serviceable life of detecting element the influence of detected pressure value through the buffering of oil circuit.
Above-mentioned first pressure transducer 11 is installed on the oil circuit of oil cylinder bottom of hydraulic pressure puncheon centralizing device, and the oil cylinder bottom is far away from drill steel, receives drill steel work impulsive force less, and detection accuracy is higher.
Apparently, first pressure transducer 11 also is not limited on the oil circuit that is installed on oil cylinder bottom, and theoretically, first pressure transducer 11 can be arranged on any position on the hydraulic pressure puncheon centralizing device oil circuit, only otherwise the function that has influence on puncheon centralizing device gets final product.
Above-mentioned detecting element is not limited to first pressure transducer 11 of above-mentioned detection oil circuit pressure, and it also can be for detecting the sensor of other position pressure.
Please refer to Fig. 3, Fig. 3 is the structured flowchart of the another kind of embodiment of drill steel device for detecting deformation provided by the present invention.
In another kind of embodiment, detecting element provided by the present invention is that second pressure transducer, 12, the second pressure transducers 12 detect the pressure on the jig arm of hydraulic pressure puncheon centralizing devices in real time, and detected second pressure signal is transferred to said control element 2; Control element 2 receives second pressure signal, and said predetermined policy is that control element 2 filters out surge pressure, and the second steady pressure value that will obtain transfers to said display 3; The said second steady pressure value of said display 3 outputs.
Second pressure transducer 12 is installed at least one jig arm of hydraulic pressure puncheon centralizing device, also can be installed on two jig arm, and a plurality of pressure transducers can also be installed on each jig arm.
Because the pressure on the jig arm changes the variation that also can reflect the drill steel deformation extent, therefore, above-mentioned embodiment also can realize the measurement of drill steel deformation extent; But; Compare with above-mentioned first kind of embodiment; The pressure of certain point can not be represented the whole pressured state of jig arm for drill steel on the jig arm of rigid structure, then can react the whole pressured state of jig arm through the conduction back more accurately to the pressure in the oil circuit; Simultaneously, pressure transducer is installed on the jig arm can directly bear the impulsive force in the drill steel work, the damage of build-up of pressure sensor easily, the serviceable life of reducing sensor, and also this instant impact can have influence on the collection degree of accuracy that drill steel receives pressure pressure; Therefore, this kind embodiment is only as a kind of possibility, and above-mentioned pressure transducer is arranged on embodiment in the hydraulic pressure puncheon centralizing device oil circuit for preferred embodiment.
It is pointed out that ordinal numbers such as " first, second " described in the literary composition, is in order to distinguish the different parts of same names, convenient just to describing, and does not represent certain order, more should not be construed as certain qualification.
Except above-mentioned drill steel anamorphic attachment for cinemascope, the present invention also provides a kind of drill jumbo that comprises above-mentioned drill steel anamorphic attachment for cinemascope, and other each several part structures of this drill jumbo please refer to prior art.
More than a kind of drill jumbo provided by the present invention and drill steel device for detecting deformation thereof have been carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.

Claims (7)

1. a drill steel device for detecting deformation comprises detecting element (1), control element (2) and display (3);
Said detecting element (1) is used for the parameter that real-time detection can reflect the drill steel deformation extent, and detected parameter signal is transferred to said control element (2);
Said control element (2) is used to receive said parameter signal, obtain the parameter value that the current deformation extent with said drill steel is complementary according to predetermined policy, and the parameter value that will be complementary with the current deformation extent of said drill steel transfers to display (3);
The parameter value that the current deformation extent of said display (3) output and said drill steel is complementary.
2. drill steel device for detecting deformation according to claim 1 is characterized in that said drill steel is fixed through the hydraulic pressure puncheon centralizing device, and said drill steel passes between two jig arm of said hydraulic pressure puncheon centralizing device.
3. drill steel device for detecting deformation according to claim 2 is characterized in that,
Said detecting element is first pressure transducer (11), and said first pressure transducer (11) detects the pressure in the oil circuit of said hydraulic pressure puncheon centralizing device in real time, and detected first pressure signal is transferred to said control element (2);
Said control element (2) receives said first pressure signal, and said predetermined policy is that said control element (2) filters out surge pressure, and the first steady pressure value that will obtain transfers to said display (3);
The said first steady pressure value of said display (3) output.
4. drill steel device for detecting deformation according to claim 3 is characterized in that, said first pressure transducer (11) is installed on the oil circuit of oil cylinder bottom of said hydraulic pressure puncheon centralizing device.
5. drill steel device for detecting deformation according to claim 1 is characterized in that,
Said detecting element is second pressure transducer (12), and said second pressure transducer (12) detects the pressure on the jig arm of said hydraulic pressure puncheon centralizing device in real time, and detected second pressure signal is transferred to said control element (2);
Said control element (2) receives said second pressure signal, and said predetermined policy is that said control element (2) filters out surge pressure, and the second steady pressure value that will obtain transfers to said display (3);
The said second steady pressure value of said display (3) output.
6. drill steel device for detecting deformation according to claim 5 is characterized in that, said second pressure transducer (12) is installed at least one jig arm of said hydraulic pressure puncheon centralizing device.
7. drill jumbo; The puncheon centralizing device that comprises drill steel, fixing said drill steel; And the drill steel device for detecting deformation that detects said drill steel deformation extent, it is characterized in that said barral of a gun device for detecting deformation is like each described drill steel device for detecting deformation of claim 1 to 6.
CN201210031819.5A 2012-02-14 2012-02-14 Drilling jumbo and drill rod deformation detection device thereof Active CN102589513B (en)

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CN201210031819.5A CN102589513B (en) 2012-02-14 2012-02-14 Drilling jumbo and drill rod deformation detection device thereof
PCT/CN2012/074325 WO2013120320A1 (en) 2012-02-14 2012-04-19 Drill carriage and apparatus for detecting drill rod deformation therefor

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CN102589513B CN102589513B (en) 2014-09-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109102640A (en) * 2017-06-20 2018-12-28 宁波轩悦行电动汽车服务有限公司 The safe leasing system of electric car

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201225889Y (en) * 2008-07-28 2009-04-22 李明 Sensor for detecting metal pin deformation

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2096735U (en) * 1991-06-29 1992-02-19 西安矿业学院 Multi-way displacement automatic searching and surveying instrument
JPH10248802A (en) * 1997-03-13 1998-09-22 Olympus Optical Co Ltd Video endoscope device
US6226045B1 (en) * 1997-10-31 2001-05-01 Seagate Technology Llc Dot clock recovery method and apparatus
JP2001175932A (en) * 1999-12-14 2001-06-29 Sanden Corp Vending machine
CN2765706Y (en) * 2004-12-27 2006-03-22 浙江卧龙科技股份有限公司 Copper hook welding distortion controller of spot welder
JP2007122059A (en) * 2005-10-28 2007-05-17 Samsung Electro Mech Co Ltd Apparatus for adjusting applied voltage in display system using diffractive optical modulator
CN201605605U (en) * 2009-11-27 2010-10-13 长安大学 Dynamic compaction machine tamping depth on-line monitoring system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201225889Y (en) * 2008-07-28 2009-04-22 李明 Sensor for detecting metal pin deformation

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
单仁亮等: "用双截面应变量测方法研究岩石冲击凿入特性", 《实验力学》 *
狄志勇: "液压凿岩机冲击性能测试方法的对比分析", 《凿岩机械气动工具》 *
蒋鼎琦等: "内燃凿岩机工作过程的试验分析研究", 《内燃机学报》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109102640A (en) * 2017-06-20 2018-12-28 宁波轩悦行电动汽车服务有限公司 The safe leasing system of electric car
CN109102640B (en) * 2017-06-20 2020-12-15 宁波轩悦行电动汽车服务有限公司 Electric automobile safety lease system

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