CN203587042U - Pipeline inner eddy current non-contact multichannel drift diameter detector - Google Patents
Pipeline inner eddy current non-contact multichannel drift diameter detector Download PDFInfo
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- CN203587042U CN203587042U CN201320708715.3U CN201320708715U CN203587042U CN 203587042 U CN203587042 U CN 203587042U CN 201320708715 U CN201320708715 U CN 201320708715U CN 203587042 U CN203587042 U CN 203587042U
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Abstract
Disclosed is a pipeline inner eddy current non-contact multichannel drift diameter detector. The detector comprises a front device chamber, a computer chamber and a battery chamber, wherein the front device chamber, the computer chamber and the battery chamber are all tubular. The technical key points are that the front device chamber, the computer chamber and the battery chamber are successively disposed, adjacent chambers are connected through shaft couplings, and the peripheries of the chambers are provided with supporting wheels uniformly distributed along the circumferential direction. The axial front end of the front device chamber is provided with a power leather cup, the back end of the front device chamber is provided with an eddy current detection ring. The eddy current detection ring is internally provided with at least an eddy current sensor having three channels. The computer chamber is internally provided with a single-chip microcomputer data processing unit, with a data memory and a USB jack attached. An eddy current detection signal is obtained through an eddy current detection circuit. The battery chamber is internally provided with a lithium battery and a positioned. The back end of the battery chamber is provided with a mileage wheel. The detector is suitable for all kinds of pipelines. To the largest extent, the detector overcomes problems that diameter unchoking in a pipeline having a large variable diameter is easily blocked. The detector needs not calibration when used every time.
Description
Technical field
The utility model belongs to pipe detection technical field, specifically a kind of interior current vortex contactless multipath drift diameter detector of pipeline that is mainly used in long-distance pipe.The online metallic conduit that detects is due to the flattening deformation forming in transportation or work progress, internal diameter varies, elbow radius of turn and direction and the pipeline auxiliary device (comprising valve, threeway, flange, bypass, weld seam, diameter changing nipple) of pipeline.Meanwhile, the positioning system that this equipment carries can accurately lock the position of above-mentioned pipeline feature, for pipeline basic condition provides more perfect archives material.
Background technology
Pipeline transmission capacity is representing a national Industry Development Level, and domestic pipeline laying is developing with the speed of ten thousand kilometers/year of 1-2 now, and by 2015, China's oil and gas pipes total length will reach 140,000 kilometers.
Oil and gas pipes is as the transmission facilities of oil and natural gas, and its security performance is most important.Oil and gas pipes is embedded in underground mostly, due to reasons such as earthquake, constructions, often makes pipeline that distortion in various degree occurs.When the situation that maybe may deform when pipeline section distortion is very not clear and definite, be to guarantee that safety can only consider the measure that long distance retubes.As pipeline is carried out to deformation detection, obtain complete reliable pipe deforming data, obtain the parameters such as its deformation position and deflection, for the security performance of accurate evaluation pipeline provides foundation, take the corresponding measures such as Local Pipe Changing, just can significantly reduce costs.In addition, before oil and gas pipes being carried out to defect (burn into crackle, interlayer, welding pore etc.) detection, also need first pipeline to be carried out to deformation detection, to guarantee that defect detector can pass through internal diameter of the pipeline smoothly.So Application and Development is very important in the relevant device of oil and gas pipes deformation detection, this kind equipment is commonly referred to as " drift diameter detector ".It is mainly used in the mapping operations such as internal diameter of the pipeline, route, for pipeline integrity evaluation and formulate working measure foundation is provided.
At present, realize the detecting device of latus rectum in pipeline both at home and abroad, all adopt contact probe, according to the shape of probe, be divided into again wheeled, rod-type, probe-type etc.The principle of work of contact has two kinds, and a kind of is the variation (wheeled) that utilizes angular displacement sensor measuring channel internal diameter, another kind of be the variation (rod-type, probe-type) that utilizes pressure transducer bonding pad measurements of springs internal diameter of the pipeline.
Contact drift diameter detector, from principle of work, has insurmountable technical bottleneck: because probe segment directly contacts with inside pipe wall, easily scratch pipeline or pipeline coating; Because probe segment directly contacts with inside pipe wall, wearing and tearing probe surface of contact, causes precise decreasing; Contact probe all adopts cantilever arrangement, and complex structure, is not suitable for the small-bore pipeline below DN300; Contact probe detecting device, by poor performance, is encountered the pipeline that reducing is larger and is easily stopped up; Before each use of contact probe detecting device, need to be to probe from new calibration, to guarantee the consistance of each probe; Contact is popped one's head in detecting device owing to adopting cantilever arrangement, at the bottom of precision, and poor anti jamming capability.
Summary of the invention
The purpose of this utility model is to provide a kind of interior current vortex contactless multipath drift diameter detector of pipeline that long-distance pipe detects that is mainly used in.
The purpose of this utility model is achieved in that it includes fore-lying device storehouse, calculating cabin and the battery compartment that is tubulose, it is characterized in that: described fore-lying device storehouse, calculating cabin and battery compartment set gradually, between adjacent warehouse, by shaft coupling, connect, in fore-lying device storehouse, the outside of calculating cabin and battery compartment is along the circumferential direction evenly distributed with support wheel; Axial forward end in fore-lying device storehouse arranges power leather cup, rear end arranges current vortex detection ring, is at least provided with the current vortex sensor of three passages in this current vortex detection ring; In calculating cabin, establish singlechip data processing unit, also a subsidiary data-carrier store and USB socket; Current vortex detection signal obtains by current vortex testing circuit, and current vortex testing circuit includes pumping signal source circuit, power amplification circuit and detects output signal circuit; Lithium battery and steady arm are set in battery compartment, and the rear end of battery compartment is provided with mileage wheel.
For to tube wall 360 degree all standings, detect and do not stay dead angle, in current vortex detection ring, be arranged at the current vortex sensor of six passages.
In order to eliminate to greatest extent to skid, wait the reading error causing, mileage is taken turns three and circumferential arrangement.
Encountering in the pipeline situation that surpasses 25% distortion, stoping detecting device to move forward, in order to avoid collision current vortex detection ring is provided with support leather cup at the axial two ends of calculating cabin.
Advantage of the present utility model and beneficial effect are as follows:
One, the utility model adopts non-contact probe technology, and probe casts directly on detection ring, does not adopt cantilever arrangement, and compact conformation, is suitable for all pipelines; Probe reaches 25% of pipeline radius with inner-walls of duct distance, the problem of easy blocking while solving to greatest extent in large tapered pipeline latus rectum; Non-contact probe is not subject to External Force Acting, does not need calibration while using at every turn; Non-contact probe on-mechanical structure, precision is high, and antijamming capability is strong, can identify radial variations more than 0.1mm.Non-contact probe technology, principle of work, has been eliminated the problem that can not solve that contact sonde is encountered at pipeline drift diameter detection field completely.
Two, the major reason that non-contact probe technology can realize is the novelty application of hyperchannel current vortex technology on pipeline drift diameter detects.With current vortex sensor, due to the change in displacement between measured body and coil, the electric signal that the magnetic signal that causes coil to produce changes into by impedance variation, by analyzing the variation of electric signal, detects physical dimension, pipeline fittings in pipeline.The special system that twines of this current vortex sensor palpus, probe diameter reaches 1:0.8 with detection apart from specific energy; Tested region circular diameter with probe diameter than reaching at maximum coverage: 1.2:1; Can identify the change of distance of lifting from more than 0.1mm.This special current vortex sensor that twines system can be realized and detect range 0-30mm on DN150 pipeline, and at least three passages of single detection ring are uniform, and each channel signal does not interfere with each other, and to tube wall 360 degree all standings, does not stay not surveyed area or signal overlap region.
Accompanying drawing explanation
Fig. 1 is structural representation sketch of the present utility model;
Fig. 2 be in Fig. 1 A-A to current vortex detection ring sectional view;
Fig. 3 is the circuit frame principle figure of current vortex testing circuit;
Fig. 4 is pumping signal source circuit;
Fig. 5 is the circuit theory diagrams of direct synthesizer AD9850 in Fig. 4;
Fig. 6 is power amplification circuit;
Fig. 7 detects output signal circuit.
Below in conjunction with accompanying drawing and by example, the utility model is described in further detail; but following example is only the utility model example wherein; do not represent the rights protection scope that the utility model limits, rights protection scope of the present utility model is as the criterion with claim.
Embodiment
According to Fig. 1 to Fig. 2, the utility model is described in detail.The utility model includes fore-lying device storehouse 2, calculating cabin 4 and the battery compartment 8 that is tubulose, fore-lying device storehouse 2, calculating cabin 4 and battery compartment 8 set gradually, between adjacent warehouse, by shaft coupling 7, connect, in fore-lying device storehouse 2, the outside of calculating cabin 4 and battery compartment 8 is along the circumferential direction evenly distributed with support wheel 5; Axial forward end in fore-lying device storehouse 2 arranges power leather cup 1, rear end arranges current vortex detection ring 3, is provided with the current vortex sensor 10 of six passages in this current vortex detection ring; In calculating cabin, establish singlechip data processing unit, also a subsidiary data-carrier store and USB socket; Current vortex detection signal obtains by current vortex testing circuit, and current vortex testing circuit includes pumping signal source circuit, power amplification circuit and detects output signal circuit; Lithium battery and steady arm are set in battery compartment, and the rear end of battery compartment is provided with three mileage wheels 9.
The function of each critical piece is as follows:
The power source generator that power leather cup 1 is detecting device, guarantees that the medium of carrying in pipeline forms pressure reduction before and after it, travels forward along media flow direction.
Processing of circuit element---the fore-lying device of hyperchannel current vortex sensor is placed in fore-lying device storehouse 2, this device is powered to current vortex sensor, and the electric signal that changes into by impedance variation of the magnetic signal that produces of the coil generation changes of magnetic field in receiving sensor, thereby output test data.
Current vortex detection ring 3 is fixed the current vortex sensor 10 of six passages; six channel signals do not interfere with each other, and detection ring material is polysulfones rod, (temperature, pressure) stable physical property under mal-condition; cutting ability is good, the consistance of protection hyperchannel current vortex sensor.Detection ring diameter is 75% of internal diameter of the pipeline.
Calculating in cabin 4 is a data processing unit based on PIC32 single-chip microcomputer, process the current vortex signal of 6 passages, the mileage of 3 passages wheel signal and a fixture signal, a subsidiary large capacity data memory, an another standby socket is so that with external computer reading out data.
Support leather cup 6 for the protection of current vortex detection ring 3, encountering in the pipeline situation that surpasses 25% distortion, stop detecting device to move forward, in order to avoid collision current vortex detection ring 3.
Before and after shaft coupling 7 guarantees, two joints do not occur mutually to rotate in a circumferential direction, but supporting axis is crooked to 90 degree.And carry out Seal Design, guarantee at junction liquid, not enter fore-lying device storehouse 2, calculate cabin 4 and battery compartment 8.
Mileage is taken turns three mileages of 9 circumferential arrangement wheel, the reading error that eliminating to greatest extent skids etc. causes.The upper magnet steel of arranging some of each mileage wheel.A honeywell switch sensor of each mileage wheel design.Each honeywell switch sensor is a passage mileage wheel signal, amounts to the input of three-way switch amount.By the normal distribution average of three mileage wheel revolutions is developed, find expectation value and error range.
During work, detecting device be take power leather cup 1 as anterior, mileage wheel 9 is as pipeline is put at rear portion after, and the pressure reduction of medium formation before and after it of carrying in pipeline of take is power source, along media flow direction, travels forward, and detects radially situation of tube wall simultaneously.
Testing process as shown in Figure 3, exciting signal source output drive signal, by power amplifier, amplify, give magnetic test coil pumping signal, the changes of magnetic field of the drive coil causing due to changes of magnetic field, magnetic test coil induction output signal, by its output signal of output signal testing circuit pickup output signal, thus output test data.
As shown in Figure 4, the outer quartz crystal of sheet and capacitor C 1, C2 form oscillating circuit in parallel provides frequency of operation for single-chip microcomputer 89C52.The I/O mouth P1.0-P1.7 of 89C52 is connected with the D0-D7 of direct synthesizer AD9850, and the data of 40bit are imported in serial into.The pin one 0 of 89C52 is connected with the FQ_UD pin of AD9850, and pin one 1 is connected with CLKIN with WLKC, forms AD9850 precision interval clock source.
As shown in Figure 5, direct synthesizer AD9850 produces sinewave output, and its frequency/phase control word is carried out continuous input control by 40bit series flow data at same pin.R1 is pull-up resistor, guarantees that single-chip microcomputer enforcement level resets; R2, R3, R4 is divider resistance, and the current signal of output is changed into voltage signal; C3, C4, C5 are filter capacitor, the interference of avoiding power supply to produce; R5, R6, L1, L2, C6, C7, C8, C9, C10 forms low-pass filter jointly, and filtering higher hamonic wave makes output frequency not be subject to the interference of extraneous and some clutters.The pumping signal producing on R6 is to power amplifier (being shown in the input of Fig. 6).
As shown in Figure 6, with operational amplifier OPA548, form power amplification circuit, the sine wave signal being produced by exciting signal source inputs to power amplifier from input end, provide simultaneously one accurately, selectable current limit function, output to electric current regulates, and by controlling the input current control electric current output range of adjustment of ILIM pin, is 0 ~ 5A.R7, the enlargement factor for setting power amplifying circuit of R8.C11, C12, C13, C15 is filter capacitor, the interference of avoiding power supply signal to cause; C14 connects positive-negative power, is decoupling capacitor, plays filter action simultaneously, avoids the high-frequency interferencing signal between power supply; Signal through power amplification circuit exports magnetic test coil (seeing the input of Fig. 7) to.
As shown in Figure 7, resistance R 9, R10 are the balance resistances of bridge circuit, form bridge circuit with two magnetic test coils, meet long-pending equal equilibrium condition, i.e. R9L4=R10L3 that bridge is multiplied each other.R11 is adjustment resistance, guarantees the equilibrium state of electric bridge.After power amplification signal input bridge circuit, through amplifier AD620, amplify.R12, R13 makes it be operated in linear amplification region for AD620 provides a bias current; C16 is filter capacitor, the interference of avoiding power supply signal to produce.Resistance R 14 arranges its gain.The voltage signal of the 6 pin outputs of AD620 is for detecting data.
Above-mentioned detection data are input to the singlechip data processing unit of calculating in cabin and process and store, singlechip data processing unit is also processed the signal of mileage wheel and the positioning signal of steady arm, when detecting the external computer reading out data of complete needs, by USB interface, connect.
The key technical indexes of the present utility model:
Detection mode: current vortex telemetry
Detectivity: radial deformation more than 1mm
Desirable travelling speed: 0.5-2m/s
Bear pressure limit: 0-20Mpa
Working temperature: 0-60 ℃
Recognition feature: valve, threeway, flange, bypass, weld seam, diameter changing nipple
Positioning precision: axially: ± 1% nearest reference point; Circumferential: ± 30 °
Confidence level: 90%
Display mode: three-D profile characterizes and embodies
In sum, having realized of the present utility model is goal of the invention.
Claims (4)
1. current vortex contactless multipath drift diameter detector in a pipeline, it includes fore-lying device storehouse, calculating cabin and the battery compartment that is tubulose, it is characterized in that: described fore-lying device storehouse, calculating cabin and battery compartment set gradually, between adjacent warehouse, by shaft coupling, connect, in fore-lying device storehouse, the outside of calculating cabin and battery compartment is along the circumferential direction evenly distributed with support wheel; Axial forward end in fore-lying device storehouse arranges power leather cup, rear end arranges current vortex detection ring, is at least provided with the current vortex sensor of three passages in this current vortex detection ring; In calculating cabin, establish singlechip data processing unit, also a subsidiary data-carrier store and USB socket; Current vortex detection signal obtains by current vortex testing circuit, and current vortex testing circuit includes pumping signal source circuit, power amplification circuit and detects output signal circuit; Lithium battery and steady arm are set in battery compartment, and the rear end of battery compartment is provided with mileage wheel.
2. current vortex contactless multipath drift diameter detector in pipeline according to claim 1, is characterized in that: the current vortex sensor that is provided with six passages in described current vortex detection ring.
3. current vortex contactless multipath drift diameter detector in pipeline according to claim 1, is characterized in that: described mileage wheel has three and circumferential arrangement.
4. current vortex contactless multipath drift diameter detector in pipeline according to claim 1, is characterized in that: at the axial two ends of calculating cabin, be provided with support leather cup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320708715.3U CN203587042U (en) | 2013-11-12 | 2013-11-12 | Pipeline inner eddy current non-contact multichannel drift diameter detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320708715.3U CN203587042U (en) | 2013-11-12 | 2013-11-12 | Pipeline inner eddy current non-contact multichannel drift diameter detector |
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| CN203587042U true CN203587042U (en) | 2014-05-07 |
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| CN201320708715.3U Expired - Fee Related CN203587042U (en) | 2013-11-12 | 2013-11-12 | Pipeline inner eddy current non-contact multichannel drift diameter detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591883A (en) * | 2013-11-12 | 2014-02-19 | 沈阳仪表科学研究院有限公司 | Eddy current non-contact multi-channel diameter detector in pipeline |
| CN104089561A (en) * | 2014-07-30 | 2014-10-08 | 中国计量科学研究院 | Deep hole inner diameter measuring system |
| CN112394105A (en) * | 2019-08-12 | 2021-02-23 | 中国石油天然气股份有限公司 | Support arm of pipeline detector and pipeline detector |
-
2013
- 2013-11-12 CN CN201320708715.3U patent/CN203587042U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591883A (en) * | 2013-11-12 | 2014-02-19 | 沈阳仪表科学研究院有限公司 | Eddy current non-contact multi-channel diameter detector in pipeline |
| CN103591883B (en) * | 2013-11-12 | 2017-02-08 | 沈阳仪表科学研究院有限公司 | Eddy current non-contact multi-channel diameter detector in pipeline |
| CN104089561A (en) * | 2014-07-30 | 2014-10-08 | 中国计量科学研究院 | Deep hole inner diameter measuring system |
| CN104089561B (en) * | 2014-07-30 | 2016-08-31 | 中国计量科学研究院 | Deep hole internal diameter measures system |
| CN112394105A (en) * | 2019-08-12 | 2021-02-23 | 中国石油天然气股份有限公司 | Support arm of pipeline detector and pipeline detector |
| CN112394105B (en) * | 2019-08-12 | 2024-01-30 | 中国石油天然气股份有限公司 | Support arm of pipeline detector and pipeline detector |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20201112 |
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| CF01 | Termination of patent right due to non-payment of annual fee |