CN204228662U - PCCP steel wire yarn break inspect car - Google Patents
PCCP steel wire yarn break inspect car Download PDFInfo
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- CN204228662U CN204228662U CN201420583930.XU CN201420583930U CN204228662U CN 204228662 U CN204228662 U CN 204228662U CN 201420583930 U CN201420583930 U CN 201420583930U CN 204228662 U CN204228662 U CN 204228662U
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- yarn break
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- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model provides a kind of PCCP steel wire yarn break inspect car, comprise car body, measuring wheel, telescopic probe support arm, transmitting probe, receiving transducer, detection main frame, main control computer, described car body comprises car base and is fixed at the shell body on described car base, the cavity that formation upper end is provided with window is enclosed between described car base and shell body, described measuring wheel is installed on described car base, described main control computer, detection main frame and transmitting probe are all positioned at described cavity, and the bottom of described transmitting probe position cavity, the top window place of described cavity is located at by the screen of described main control computer, described measuring wheel is installed on described car base, the upper end of described probe support arm connects described receiving transducer, and probe support arm is fixedly installed on described car base or shell body, described receiving transducer realizes relative to the movement of described transmitting probe along with the lifting of described probe support arm, and described receiving transducer moves in the upside of described shell body.
Description
Technical field
The utility model relates to concrete field, particularly relates to a kind of PCCP steel wire yarn break inspect car.
Background technology
PCCP pipe (Prestressed Concrete Cylinder Pipe) is the abbreviation of the prestressed concrete pipe of band steel cylinder; use heavy caliber, high pressure resistant tubing widely in the world at present; by be embedded into thin steel cylinder tube core, be entangled in the compressor wire (diameter) outside tube core and the cement mortar protective course outside steel wire forms, as shown in Figure 1.The two ends of pipe are welded with socket ring and the socket circle of steel respectively, and the flexible joint of pipe adopts slip rubber sealing.In working order, the thin steel cylinder be embedded in the pipe wall has impervious function, the concrete wall being wrapped in compressor wire outside tube core and tube core bears internal water pressure and the external load of tubing, and therefore PCCP pipe is a kind of pipe kind combined with the advantage of common prestressed concrete pipe by steel pipe.
In far-field eddy transformer coupled (RFECTC) technology adopts, probe mode detects metal pipe material, the feature of this technology is to check ferrous material, can nonferrous materials be checked again, and to inside or the abnormal conditions of outside there is identical sensitivity.The entirety adopting single probe just can detect pit, crackle and tube wall is thinning.
Adopt a drive coil in tube wall, induce the eddy current of circumference with low level of magnetization, different from more conventional EDDY CURRENT, magnetic test coil is placed on apart from drive coil 2 ~ 3 times of caliber places along pipeline by this technology, and detector signal is often used as the tolerance of tube wall characteristic relative to the phase place of drive coil.
The drive coil driven by the sinusoidal signal that frequency is quite low, the built-in field produced in the duct, the region of three different in kinds can be divided on the both sides of drive coil, these regions are called as direct-coupling district, zone of transition and far-field region, as shown in Figure 1, the transformer coupled know-why schematic diagram of far-field eddy.
The working environment of PCCP yarn break inspect equipment is in the inside of PCCP pipeline, and the structure (main fingering manhole) of PCCP pipeline itself and environment have critical impact to the complete machine structure of PCCP yarn break inspect instrument and technological design.Yarn break inspect equipment of the prior art is all scattered, lacks the equipment of integration, and cannot adapt to the PCCP pipe of different tube diameters.
Utility model content
The technical problems to be solved in the utility model is the PCCP steel wire yarn break inspect equipment how providing a kind of integration, and can adapt to the PCCP pipe of different tube diameters.
In order to solve this technical matters, the utility model provides a kind of PCCP steel wire yarn break inspect car, comprise car body, measuring wheel, telescopic probe support arm, transmitting probe, receiving transducer, detection main frame, main control computer, described car body comprises car base and is fixed at the shell body on described car base, the cavity that formation upper end is provided with window is enclosed between described car base and described shell body, described measuring wheel is installed on described car base, described main control computer, detection main frame and transmitting probe are all positioned at described cavity, and described transmitting probe is positioned at the bottom of described cavity, the top window place of described cavity is located at by the screen of described main control computer, described measuring wheel is installed on described car base, the upper end of described probe support arm connects described receiving transducer, and described probe support arm is fixedly installed on described car base or shell body, described receiving transducer realizes relative to the movement of described transmitting probe along with the lifting of described probe support arm, and described receiving transducer moves in the upside of described shell body.
Described transmitting probe comprises the AC signal responding the input of described detection main frame, launch corresponding electromagnetic wave signal, thus on PCCP tube wall, induce the transmitting coil of eddy current signal and the blanking disc for the direct-coupling signal between described transmitting coil and receiving transducer of decaying, described transmitting coil is located in described blanking disc, described blanking disc is located on described car base, and the AC signal that described detection main frame produces sends through described transmitting coil.
Described blanking disc is double-layer shielding structure, comprises one deck copper sheet layer and one deck iron sheet layer.
Described transmitting coil adopts single loop coil.
Described receiving transducer comprises responding eddy current signal, thus induces receiving coil and the low noise amplifier of voltage signal, and the voltage signal induced through described receiving coil is input to described detection main frame after described low noise amplifier.
Described transmitting coil adopts single loop coil.
Described probe support arm comprises fixed bar, one-level expansion link and secondary expansion link, and described fixed bar is fixedly connected with described car base or shell body, and the upper end of described fixed bar is positioned at the upside of described housing, and described receiving transducer is located on described secondary expansion link;
Described one-level expansion link axially stretching relative to described fixed bar along described fixed bar, and realize degree of tightness by a securing member;
Described secondary expansion link axially stretches relative to described one-level expansion link along described one-level expansion link, and realizes degree of tightness by a securing member.
When carrying out yarn break inspect, the maximum length of described probe support arm can make described receiving transducer and transmitting probe along PCCP caliber to arrangement, and makes described receiving transducer be positioned at top inside PCCP pipe further.
The both sides along direct of travel of described shell body or car base are respectively equipped with a telescopic push and pull bar.
Four sides of described shell body or car base are respectively equipped with a hoisting ring.
Measuring wheel, probe support arm, transmitting probe, receiving transducer, detection main frame, main control computer, by the introducing of car body, are all integrated thereon by the utility model, and then just can realize PCCP steel wire yarn break inspect by means of only an inspection vehicle.Meanwhile, the utility model also introduces the lifting that telescopic probe support arm achieves receiving transducer, thus can adapt to the PCCP pipe of different tube diameters.
Accompanying drawing explanation
Fig. 1 is the transformer coupled know-why schematic diagram of far-field eddy in prior art
Fig. 2 is the connection diagram of PCCP steel wire yarn break inspect car in the utility model one embodiment;
Fig. 3 is the structural representation of PCCP steel wire yarn break inspect car in the utility model one embodiment;
In figure, 1-receiving transducer; 2-secondary expansion link; 3-securing member; 4-one-level expansion link; 5-push and pull bar; 6-securing member; 7-fixed bar; 8-shell body; 9-cavity; 10-transmitting coil; 11-blanking disc; 12-measuring wheel; 13-car base.
Embodiment
Below with reference to Fig. 1 to Fig. 3, the PCCP steel wire yarn break inspect car that the utility model provides is described in detail, it is the utility model one optional embodiment, can think, those skilled in the art, in the scope not changing the utility model spirit and content, can modify to it and polish.
Present embodiments provide a kind of PCCP steel wire yarn break inspect car, comprise car body, measuring wheel, telescopic probe support arm, transmitting probe, receiving transducer 1, detection main frame, main control computer, the shell body 8 that described car body comprises car base 13 and is fixed on described car base 13, the cavity 9 that formation upper end is provided with window is enclosed between described car base 13 and described shell body, described measuring wheel 12 is installed on described car base 13, described main control computer, detection main frame and transmitting probe are all positioned at described cavity, and described transmitting probe is positioned at the bottom of described cavity 9, the top window place of described cavity 9 is located at by the screen of described main control computer, described measuring wheel 12 is installed on described car base 13, the upper end of described probe support arm connects described receiving transducer 1, and described probe support arm is fixedly installed on described car base 13 or shell body 8, described receiving transducer 1 realizes relative to the movement of described transmitting probe along with the lifting of described probe support arm, and described receiving transducer 1 moves in the upside of described shell body 8.Described receiving transducer 1, transmitting probe and measuring wheel 12, main control computer are all connected with described detection main frame.
Described transmitting probe comprises the AC signal responding the input of described detection main frame, launch corresponding electromagnetic wave signal, thus on PCCP tube wall, induce the transmitting coil 10 of eddy current signal and the blanking disc 11 for the direct-coupling signal between described transmitting coil 10 and receiving transducer of decaying, described transmitting coil 10 is located in described blanking disc 11, described blanking disc 11 is located on described car base 13, and the AC signal that described detection main frame produces sends through described transmitting coil 10.In the present embodiment, described blanking disc 11 is double-layer shielding structure, comprises one deck copper sheet layer and one deck iron sheet layer.Described transmitting coil 10 adopts single loop coil.
About described transmitting probe:
Described transmitting probe comprises transmitting coil 10 and blanking disc 11, described transmitting coil 10 is located in described blanking disc 11, described transmitting coil 10, at least in order to respond the AC signal of described detection main frame input, launch corresponding electromagnetic wave signal, thus induce eddy current signal on PCCP tube wall; The direct-coupling signal of described blanking disc 11 at least for decaying between described transmitting coil 10 and receiving transducer 1; Described AC signal includes the test AC signal and reference synchronization AC signal that match each other; According to the effect of blanking disc 11, can know its concrete shape and the spatial relationship between itself and transmitting coil 10, be as the criterion can realize decay direct-coupling signal.
Transmitting coil 10 is a kind of transducers, the AC signal that low-frequency power amplifier exports is converted to electromagnetic wave signal and launches, PCCP tube wall induces eddy current signal.
Transmitting coil 10 requires to have high energy conversion efficiency and low energy loss, namely requires higher quality factor (Q), usually selects the wire of coiling according to frequency of operation.The telefault of low-frequency range work should adopt the wire coiling of the tape insulations such as enameled wire.For the telefault of frequency of operation between tens kilo hertzs to two megahertzes, split conductor coiling should be adopted, to increase conductor net sectional area, reduce the impact of kelvin effect, Q value can be made to improve 30%-40%.For the telefault of frequency of operation higher than 2MHz, should adopt the coiling of sub-thread heavy gauge wire, the diameter of wire is generally between 0.3-1.5mm.The frequency of operation of native system is lower, therefore selects enameled wire as the wire of coiling.
The form of transmitting coil 10 adopts single loop coil form, and the advantage of single loop coil is the distribution rule of its induction field, good directionality, and the shape of its inductive mode is as same corn, and it makes and processes also fairly simple simultaneously.Another large feature of single loop coil is easy to parameter calculate, and be conducive to carrying out analytical type design, its impedance can be expressed as:
Z＝R+jωL (1)
Real part is direct current resistance, and available Ohm law calculates:
Wherein ρ is conductor resistance rate, and l is wire total length, and s is the cross-sectional area of wire.
The calculating of inductance can be obtained according to the computing formula of pancake coil:
Wherein a is coil mean radius, and c is coil thickness, and h is coil height, and N is coil turn.
In the present system, in order to form the magnetic field of high strength, flow through electric current large as far as possible in inevitable requirement transmitting coil 10, this just requires that the impedance of transmitting coil 10 is little as far as possible, and selecting compared with the enameled wire in thick line footpath is exactly necessary requirement.
Blanking disc 11 is containers of transmitting coil 10, the more important thing is that blanking disc 11 effectively can reduce the distance of far-field signal formation, and the direct-coupling signal between effective decay transmitting coil and receiving transducer, the significant near-field signals that reduces is disturbed.In the present embodiment, described blanking disc 11 is double-layer shielding structure, comprises one deck copper sheet layer and one deck iron sheet layer.
From remote eddy current detection technique principle, the energy that far-field eddy signal produces at 2-3 times of caliber place is occupied an leading position, therefore magnetic test coil is placed in this place by remote eddy current checkout equipment usually, and the PCCP caliber that this test platform detects is generally a bit several meters even longer, if strict with precursor in far field principle, then the size of equipment will reach several meters, not easily detect in PCCP pipe, and equipment is also difficult to carry simultaneously.Therefore, how to draw up far-field effect at limited equipment size counterdie, obtaining far-field eddy signal is the gordian technique needing to solve.
Under the condition that equipment size is limited, the distance of drive coil and receiving coil can not meet 2-3 times of caliber required distance, and now receiving coil is in direct-coupling district, and the energy of being come by drive coil direct-coupling is much larger than the energy of far-field eddy signal.A double-layer shielding device is made by the copper sheet of high conductivity and the iron sheet of high magnetic permeability, be placed in drive coil dorsad, block the direct-coupling path between drive coil and receiving coil, outstanding far-field eddy information, make far field distance foreshorten to 1.7 times of calibers by 2-3 times of caliber, greatly shorten far field distance.
Described receiving transducer comprises responding eddy current signal, thus induces receiving coil and the low noise amplifier of voltage signal, and the voltage signal induced through described receiving coil is input to described detection main frame after described low noise amplifier.Described transmitting coil adopts single loop coil.
Described receiving transducer, at least in order to respond described eddy current signal, thus induces the voltage signal corresponding with described AC signal, and transfers to described detection main frame; Described voltage signal comprises the test voltage signal corresponding with described test AC signal and the reference synchronization voltage signal corresponding with described reference synchronization AC signal;
Described receiving transducer 1 mainly comprises receiving coil and low noise amplifier.
The same transmitting coil of development principle of receiving coil, enameled wire coiling compared with fine line diameter can be adopted unlike receiving coil with transmitting coil, so not only probe weight can be alleviated, simultaneously thinner wire diameter allows the more coil turn of coiling in identical volume, from Faraday's electromagnetic induction law, receiving coil induced voltage can be strengthened like this, thus improve the sensitivity of inspection vehicle.
Low noise amplifier in receiving transducer 1 should be tried one's best near receiving coil, like this can effectively noise decrease interference.
PCCP yarn break inspect test platform is Detection of Weak Signals equipment, the amplitude of detection signal is too low, be generally microvolt level level, and the noise that the uneven conductivity that causes of the white noise of system itself, PCCP pipe wall material and structure and magnetic permeability change are introduced, platform are advanced noise that when measuring, probe Lift-off effect is introduced and the frequency interferences from the external world, especially Hz noise noise is all much larger than signal level, completely useful signal is submerged in the middle of noise, how to eliminate or to suppress these noise signals, improving signal to noise ratio (S/N ratio), is a gordian technique of this platform.
This platform is first by program-controlled low-noise amplifier, and filtering partial noise signal, improve signal to noise ratio (S/N ratio), the rear phase-locked principle utilizing lock-in amplifier, extracts useful signal, finally realize the suppression of rear class noise with software processing method from noise signal.
Described receiving transducer is installed on described car body by a length-adjustable probe support arm.Described probe support arm is fixed on described car body, makes described receiving transducer 1 and transmitting probe along PCCP caliber to arrangement, and makes described receiving transducer be positioned at top inside PCCP pipe further, and transmitting probe is positioned at the bottom inside PCCP pipe.The design of probe support arm can regulate the spacing between transmitting-receiving probe easily, to adapt to the PCCP pipeline of different inner diameters.
In the present embodiment, the coiling direction of described receiving coil and transmitting coil is orthogonal.The coiling axle center of described receiving coil is horizontally disposed with, and the coiling axle center of described transmitting coil is vertically arranged.
Described probe support arm comprises fixed bar 7, one-level expansion link 4 and secondary expansion link 2, described fixed bar 7 is fixedly connected with described car base 13 or shell body 8, and the upper end of described fixed bar 7 is positioned at the upside of described housing, described receiving transducer is located on described secondary expansion link 2;
Described one-level expansion link 4 axially stretching relative to described fixed bar 7 along described fixed bar, and realize degree of tightness by a securing member 3;
Described secondary expansion link 2 axially stretches relative to described one-level expansion link 4 along described one-level expansion link 4, and realizes degree of tightness by a securing member 3.
When carrying out yarn break inspect, the maximum length of described probe support arm can make described receiving transducer 1 and transmitting probe along PCCP caliber to arrangement, and makes described receiving transducer be positioned at top inside PCCP pipe further.
In addition, the both sides along direct of travel of described shell body 8 or car base 13 are respectively equipped with a telescopic push and pull bar 5.Four sides of described shell body or car base are respectively equipped with a hoisting ring.
Described detection main frame, at least in order to:
Generate described AC signal, and export described transmitting probe and main control computer to;
The pulse signal exported by described measuring wheel triggers, and gathers treated described reference synchronization voltage signal and described test voltage signal;
Described main control computer is uploaded to by after treated described reference synchronization voltage signal and described test voltage signal transacting;
Described main control computer, at least in order to:
The artificial input of response or foundation presupposed information control the running of described detection main frame automatically;
The artificial input of response or foundation presupposed information process the described reference synchronization voltage signal and test voltage signal that receive automatically;
Thus store and show testing result;
Described measuring wheel, in order to generate described pulse signal according to the change in location of advancing.
When the probe vehicles of the present embodiment is carried out at a slow speed in PCCP pipeline, signal source produces the sinusoidal signal of fixed frequency and amplitude by the parameter that control treatment software is preset, sinusoidal signal produces the low frequency magnetic field of alternation after low-frequency power amplifier amplifies by transmitting coil, PCCP tube wall induces the eddy current signal that can penetrate tube wall, this eddy current signal is propagated along the compressor wire outside outer tube wall and tube wall, again penetrate tube wall at the opposite side of tube wall and enter in PCCP pipeline, signal source also exports the lock-in amplifier of synchronous reference signal to receiving element as the input of reference signal simultaneously.
The far-field eddy signal penetrating tube wall can induce faint voltage signal in receiving coil, this voltage signal sends lock-in amplifier to after low noise amplifier amplifies, lock-in amplifier carries out filtering purification to this voltage signal again according to the frequency of reference signal and phase place, further amplification, through data collecting card collection.
Measuring wheel 12 is carried out with test platform and rolls, and produce a series of pulse signal, trigger data acquisition card gathers the signal that lock-in amplifier sends.The data upload that data collecting card collects, to computing machine, is undertaken storing and showing by computing machine.The pulse signal simultaneously produced according to measuring wheel can calculate the more specific location information of current test platform.
When fracture of wire appears in PCCP, the distortion in amplitude and phase place can be produced the far-field eddy signal penetrating tube wall for twice, utilize this phenomenon, just can realize judging the radical of PCCP fracture of wire and circuit wire position.
In sum, measuring wheel, probe support arm, transmitting probe, receiving transducer, detection main frame, main control computer, by the introducing of car body, are all integrated thereon by the utility model, and then just can realize PCCP steel wire yarn break inspect by means of only an inspection vehicle.Meanwhile, the utility model also introduces the lifting that telescopic probe support arm achieves receiving transducer, thus can adapt to the PCCP pipe of different tube diameters.
Claims (10)
1. a PCCP steel wire yarn break inspect car, it is characterized in that: comprise car body, measuring wheel, telescopic probe support arm, transmitting probe, receiving transducer, detection main frame, main control computer, described car body comprises car base and is fixed at the shell body on described car base, the cavity that formation upper end is provided with window is enclosed between described car base and described shell body, described measuring wheel is installed on described car base, described main control computer, detection main frame and transmitting probe are all positioned at described cavity, and described transmitting probe is positioned at the bottom of described cavity, the top window place of described cavity is located at by the screen of described main control computer, described measuring wheel is installed on described car base, the upper end of described probe support arm connects described receiving transducer, and described probe support arm is fixedly installed on described car base or shell body, described receiving transducer realizes relative to the movement of described transmitting probe along with the lifting of described probe support arm, and described receiving transducer moves in the upside of described shell body.
2. PCCP steel wire yarn break inspect car as claimed in claim 1, it is characterized in that: described transmitting probe comprises responding the AC signal of described detection main frame input, launch corresponding electromagnetic wave signal, thus on PCCP tube wall, induce the transmitting coil of eddy current signal and the blanking disc for the direct-coupling signal between described transmitting coil and receiving transducer of decaying, described transmitting coil is located in described blanking disc, described blanking disc is located on described car base, and the AC signal that described detection main frame produces sends through described transmitting coil.
3. PCCP steel wire yarn break inspect car as claimed in claim 2, is characterized in that: described blanking disc is double-layer shielding structure, comprises one deck copper sheet layer and one deck iron sheet layer.
4. PCCP steel wire yarn break inspect car as claimed in claim 2, is characterized in that: described transmitting coil adopts single loop coil.
5. PCCP steel wire yarn break inspect car as claimed in claim 1, it is characterized in that: described receiving transducer comprises responding eddy current signal, thus inducing receiving coil and the low noise amplifier of voltage signal, the voltage signal induced through described receiving coil is input to described detection main frame after described low noise amplifier.
6. PCCP steel wire yarn break inspect car as claimed in claim 5, is characterized in that: described transmitting coil adopts single loop coil.
7. PCCP steel wire yarn break inspect car as claimed in claim 1, it is characterized in that: described probe support arm comprises fixed bar, one-level expansion link and secondary expansion link, described fixed bar is fixedly connected with described car base or shell body, and the upper end of described fixed bar is positioned at the upside of described housing, described receiving transducer is located on described secondary expansion link;
Described one-level expansion link axially stretching relative to described fixed bar along described fixed bar, and realize degree of tightness by a securing member;
Described secondary expansion link axially stretches relative to described one-level expansion link along described one-level expansion link, and realizes degree of tightness by a securing member.
8. the PCCP steel wire yarn break inspect car as described in claim 1 or 7, it is characterized in that: when carrying out yarn break inspect, the maximum length of described probe support arm can make described receiving transducer and transmitting probe along PCCP caliber to arrangement, and makes described receiving transducer be positioned at top inside PCCP pipe further.
9. PCCP steel wire yarn break inspect car as claimed in claim 1, is characterized in that: the both sides along direct of travel of described shell body or car base are respectively equipped with a telescopic push and pull bar.
10. PCCP steel wire yarn break inspect car as claimed in claim 1, is characterized in that: four sides of described shell body or car base are respectively equipped with a hoisting ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420583930.XU CN204228662U (en) | 2014-10-10 | 2014-10-10 | PCCP steel wire yarn break inspect car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420583930.XU CN204228662U (en) | 2014-10-10 | 2014-10-10 | PCCP steel wire yarn break inspect car |
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| Publication Number | Publication Date |
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| CN204228662U true CN204228662U (en) | 2015-03-25 |
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| CN201420583930.XU Expired - Lifetime CN204228662U (en) | 2014-10-10 | 2014-10-10 | PCCP steel wire yarn break inspect car |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442706A (en) * | 2016-08-26 | 2017-02-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Underground dynamic steel wire detector |
| CN108181377A (en) * | 2017-12-12 | 2018-06-19 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | A kind of PCCP steel wires fracture of wire intelligent interpretation system and method |
| CN109282998A (en) * | 2018-09-04 | 2019-01-29 | 广州华智汽车部件有限公司 | A kind of automotive seat front row backrest detecting tool |
-
2014
- 2014-10-10 CN CN201420583930.XU patent/CN204228662U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442706A (en) * | 2016-08-26 | 2017-02-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Underground dynamic steel wire detector |
| CN106442706B (en) * | 2016-08-26 | 2024-03-01 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Underground steel wire dynamic detector |
| CN108181377A (en) * | 2017-12-12 | 2018-06-19 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | A kind of PCCP steel wires fracture of wire intelligent interpretation system and method |
| CN109282998A (en) * | 2018-09-04 | 2019-01-29 | 广州华智汽车部件有限公司 | A kind of automotive seat front row backrest detecting tool |
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