CN104062399A - Nondestructive testing device for pipeline joint coating anticorrosive layer - Google Patents
Nondestructive testing device for pipeline joint coating anticorrosive layer Download PDFInfo
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- 238000009659 non-destructive testing Methods 0.000 title abstract description 3
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- 238000001514 detection method Methods 0.000 claims abstract description 26
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- 238000005260 corrosion Methods 0.000 claims description 38
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- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
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- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
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- 239000002390 adhesive tape Substances 0.000 description 1
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- 230000002547 anomalous effect Effects 0.000 description 1
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- 239000003795 chemical substances by application Substances 0.000 description 1
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
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- 230000001066 destructive effect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
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Abstract
The invention relates to a nondestructive testing device for the bonding quality of an anticorrosive coating of a joint coating of an oil and gas pipeline. The detection device consists of a basic frame, a traveling mechanism, an adsorption mechanism and a sensor clamping mechanism; the base frame is a carrier of the walking mechanism, the adsorption mechanism and the sensor clamping mechanism; the walking mechanism is a power component for driving the device to walk; the sensor clamping mechanism fixes the detection sensor; installing adsorption bases of an adsorption mechanism for adsorbing the detection device at the position of the pipeline joint coating on two sides of the joint coating anticorrosive layer (9), wherein the rest parts of the adsorption mechanism, a base frame and a travelling mechanism jointly form a carrier moving around the circumference of the pipeline joint coating anticorrosive layer (9); a walking mechanism is installed at one end of the basic frame, and the sensor clamping mechanisms are installed in the middle and at two ends of the basic frame. The method can be used for rapidly scanning and measuring the joint repairing bonding quality, particularly the bonding force without damaging a joint repairing anticorrosive coating, and has the advantages of high detection efficiency, strong self-adaptive capacity and accurate defect quantification.
Description
Technical field
The present invention is joint coating on pipeline anticorrosive coat the cannot-harm-detection device of a kind of oil and gas pipeline preventing corrosion of repaired mouth layer bonding quality, relates to ergometry and piping system technical field.
Background technology
Joint coating on pipeline is the corrosion prevention operation of two segment pipe welds.In the work progress of buried steel pipeline, joint coating on pipeline is the important procedure that guarantees pipeline corrosion protection integrality, is also the key link that guarantees whole pipeline external anti-corrosion layer quality.
For joint coating on pipeline, if opening-supplementing material selection is improper, field joint construction is of poor quality, the integrality of pipeline external anti-corrosion layer will be damaged.And the initial failure of opening-supplementing material will cause the massive losses of financial resource.At present, domestic 3PE corrosion-proof pipe line almost all adopts tygon material contracting with heat to carry out repaired mouth, but in pipeline installation construction period and the use that puts into operation, all found many quality problems, it is not little that excavation detects discovery repaired mouth inefficacy proportion, and pipeline has been formed to corrosion harmfulness risk.Appearance and the quality control during pipeline construction of joint coating on pipeline anticorrosive coat quality problems have very large relation.In joint coating on pipeline quality testing, leak source detects and outward appearance visual detection is to survey content, and wherein, after repaired mouth, the peel strength of heat shrink sleeve or bonding force test are sampling observation modes.In GB/T23257-2009 " buried steel pipeline polyethylene anticorrosive coating " standard, stipulate, every 100 repaired mouths are at least taken a sample test a mouth.The mode of this sampling observation has been brought great hidden danger to pipe safety.In addition, this individual difference that detects operating personnel can produce certain influence to the accuracy detecting, and bonding force test has destructiveness, during detection with cutter along pipe ring to the adhesive tape layer of scratching 10 mm wides, length and being greater than 100 millimeters, until then body becomes an angle of 90 degrees to pull open with spring balance with tube wall.After this destructive spring balance method of testing is completed, need the repairing anticorrosion coating to test position, the performance tool of anticorrosive coat is had a certain impact.
CN1761871A discloses a kind of pipeline outer wall corrosion the cannot-harm-detection device, but detects not efficient for joint coating on pipeline anticorrosive coat.
Summary of the invention
The object of the invention is to invent a kind of for the Non-Destructive Testing of preventing corrosion of repaired mouth layer bonding quality, in the situation that not destroying preventing corrosion of repaired mouth layer to repaired mouth bonding quality, particularly bonding force carry out rapid scanning measurement, detection efficiency is high, adaptive ability is strong, the accurate joint coating on pipeline anticorrosive coat of defect quantitative the cannot-harm-detection device.
Device of the present invention is comprised of basic framework, travel mechanism, adsorbing mechanism, sensor clamping device.Basic framework is the carrier of travel mechanism, adsorbing mechanism, sensor clamping device; Travel mechanism is to order about the power part of device walking; Adsorbing mechanism is pick-up unit to be adsorbed in to the parts at joint coating on pipeline place; Sensor clamping device is the parts of fixed test sensor, and sensor is contacted with joint coating on pipeline layer surface fully in testing process.The absorption basis of adsorbing mechanism is arranged on preventing corrosion of repaired mouth layer 9 both sides, the carrier that the remainder of adsorbing mechanism and basic framework, the common formation of travel mechanism move around joint coating on pipeline anticorrosive coat 9 circumference; One end at basic framework is provided with travel mechanism, and sensor clamping device is arranged on middle part and the two ends of basic framework.
Fig. 1 is shown in by apparatus of the present invention work schematic diagram, the principle of work when having shown the formation of long oil and gas pipeline and the assembly relation of each parts of repaired mouth pick-up unit in figure and having detected.Long oil and gas pipeline generally lays 3PE anticorrosive coat 3 and two ends by body and docks and be welded between two without the metallic conduit 1 of anti-corrosion protection, and two segment pipe joints form weld seams 2.After welding, weld seam 2 both sides are carried out anti-corrosion protection without the part of anti-corrosion protection by preventing corrosion of repaired mouth layer 9.During the operation of preventing corrosion of repaired mouth layer pick-up unit, first the guide rail hoop 4 of constituent apparatus adsorbing mechanism is fixed on to preventing corrosion of repaired mouth layer 9 both sides, then by apparatus main body across being adsorbed on guide rail hoop 4 at joint coating on pipeline place and by magnet-wheel 7, finally under the driving of driving wheel 10, be with 15 pairs of preventing corrosion of repaired mouth layer 9 examinations of dynamic sensor.
Described basic framework consists of two fixed heads 5 and a coupling shaft 6, by coupling shaft 6, two fixed heads 5 is connected into " work " font; Fixed head 5 is isosceles triangular structure, and as Fig. 3, fixed head 5 is provided with 1 chute hole a17 and two pilot hole a13; Coupling shaft 6 is assemblys of two kinds of columns of different-diameter, the column diameter in stage casing is large and be provided with pilot hole b19, the column diameter at two ends is little and be processed with screw thread, can be placed on the assembly connection of realizing coupling shaft 6 and fixed head 5 in the chute hole a17 of fixed head 5, as Fig. 4.Fixed head 5 is immobilizing foundations of travel mechanism, adsorbing mechanism and coupling shaft 6, and travel mechanism is connected with fixed head 5 by pilot hole a13 with adsorbing mechanism, and coupling shaft 6 is connected with two fixed heads 5 by chute hole 17, as Fig. 2.
Described travel mechanism consists of stepper motor 8, scrambler 11 and driving wheel 10.Driving wheel 10 is cylindrical roller, and middle part is provided with groove 27 and controls for the running orbit of whole device; Scrambler 11 is combined with stepper motor 8, is mainly used in measuring the straight-line displacement of stepper motor 8.Totally two groups, travel mechanism, is separately fixed on two fixed heads 5, is mutually diagonal angle and distributes, and wherein stepper motor 8 and scrambler 11 are assemblied in fixed head 5 outsides, and driving wheel 10 is assemblied in fixed head 5 inner sides, as Fig. 2.
Described adsorbing mechanism is mainly comprised of magnet-wheel 7, guide rail hoop 4.Magnet-wheel 7 is the column type rollers with magnetic force, and middle part is provided with groove 27; Guide rail hoop 4 is absorption bases of adsorbing mechanism, semi-circular strip of steel 24 by two same sizes forms, as Fig. 5 and Fig. 6, steel band 24 one end are provided with fixedly card column 25, fixedly card column 25 is semicylinder structure, steel band 24 other ends are provided with the buttcover plate 28 vertical with steel band end camber line, on buttcover plate 28, offer pilot hole.After 24 docking of two steel bands with two of one end fixedly card column 25 form a complete right cylinder, right cylinder overcoat steel ring is fixed connection, two buttcover plates 28 of the other end combine closely with bolt, realize closed.Steel band 24 middle parts are provided with fin 26, and fin 26 provides guide channel for magnet-wheel 7 and driving wheel 10, and during pick-up unit walking, the groove 27 of magnet-wheel 7 and driving wheel 10 is stuck on fin 26, and the movement locus of limiting and detecting device, avoids device to be offset.Totally two groups of adsorbing mechanisms, two groups of guide rail hoops 4 are arranged on respectively repaired mouth heat shrink sleeve 9 both sides, and two groups of magnet-wheels 7 are arranged on the fixed head 5 of basic framework both sides, with travel mechanism cross-distribution, as Fig. 2.
Described sensor clamping device consists of the axis of guide 12, spring 22, sensor cavity volume piece 14 and sensor 15.The axis of guide 12 is ball body and cylindrical composite structure, it is the fixture of sensor clamping device, as Fig. 7, the right cylinder of the axis of guide 12 upper ends is two cylindrical assemblys of different-diameter, the right cylinder that diameter is larger is connected with the spherosome of the axis of guide 12, the cylinder end that diameter is less is processed with screw thread, mainly realizes being connected of the axis of guide 12 and coupling shaft 6, and the pilot hole b19 by coupling shaft 6 is fixed on the axis of guide 12 on coupling shaft 6; The spherical of the axis of guide 12 lower ends is partly the member that is connected sensor cavity volume piece 14, and the banking motion that is mainly sensor 15 certain limits provides support, and makes sensor adapt to the situation of repaired mouth shrink belt 9 surface undulation injustice.Sensor cavity volume piece 14 is the bare bones that form the sensor cavity volume that holds sensor 15, as Fig. 8, sensor cavity volume piece 14 is a kind of shaped pieces, by upper end, offering the cylinder that the cylinder of the spherical fluting 16 of semicircular and lower end offer rectangle fluting 18 combines, sensor cavity volume piece 14 lower ends are provided with chute hole b20, middle part is provided with pilot hole c21, and chute hole b20 provides passage for sensor 15 moves up and down, and a complete sensor cavity volume is formed by 14 docking of two sensor cavity volume pieces.Sensor 15 is repaired mouth heat shrink sleeve detection parts of a cuboid structure, as Fig. 9, sensor 15 is placed on the chute hole b20 of sensor cavity volume piece 14 by the chute card 23 of the left and right sides, the surperficial surrounding that sensor 15 contacts with preventing corrosion of repaired mouth layer 9 is fillet profile, and this surface structure can make sensor 15 slide on the preventing corrosion of repaired mouth layer 9 of surface irregularity.Sectional view after the assembling of sensor clamping device is complete is as Figure 10, during assembling, first the axis of guide 12, spring 22 and sensor 15 are placed in the middle of two sensor cavity volume pieces 14, then by 14 closed butt joints of two sensor cavity volume pieces, and by an integral body of the fixing formation of bolt for pilot hole c21.
The present invention can realize quantitative detection, pick-up unit is by the azimuth information of scrambler 11 Real-time Obtaining sensors 15 in pipe circumference, coordinate again sensor 15 in the positional information of coupling shaft 6 and the testing result to preventing corrosion of repaired mouth layer 9 of sensor 15, realize quantitatively accurately detecting of preventing corrosion of repaired mouth layer 9 defect.
Advantage of the present invention:
1) pipe detection device is adsorbed on by magnetic wheel and on the guide rail hoop being fastened on pipeline, carries out preventing corrosion of repaired mouth layer quality of adhesive detection, guide rail cuff structure is simple, can be according to different tube diameters processing and fabricating, pick-up unit agent structure is not subject to the impact of pipe diameter like this, and the repaired mouth that is applicable to multiple caliber pipeline detects;
2) by the mode of longitudinal many probes and axial motion mechanism, realize the fast detecting of opening-supplementing material, detection efficiency is high;
3) sensor can left and right and lower upper certain limit move, be not subject to the impact of joint coating on pipeline place different-thickness anticorrosive coat, adaptive ability is strong;
4) extendability is strong, and the dissimilar sensor of portability carries out defects detection of different nature; The sensor of varying number can be set, and the scanning that realizes different densities detects;
5) coupling shaft setting height(from bottom) is adjustable, can realize the adjustment of the different contact forces of sensor and adapt to different radian joint coating on pipeline and detect needs.
6) device walking is stable, and the groove close-coupled on the fin on guide rail hoop and driving wheel and magnet-wheel skew can not occur and skid while having guaranteed pick-up unit walking.
7) can realize quantitative detection, pick-up unit is by the azimuth information of scrambler 11 Real-time Obtaining sensors 15 in pipe circumference, coordinate again sensor 15 in the positional information of coupling shaft 6 and the testing result to preventing corrosion of repaired mouth layer 9 of sensor 15, realize quantitatively accurately detecting of preventing corrosion of repaired mouth layer 9 defect.
Accompanying drawing explanation
Fig. 1 device work schematic diagram
Fig. 2 pick-up unit main part schematic diagram
Fig. 3 fixed plate structure figure
Fig. 4 connecting axle structure figure
The one-piece construction figure of Fig. 5 guide rail hoop
The structural drawing of Fig. 6 guide rail hoop steel
Fig. 7 axis of guide structural drawing
Fig. 8 sensor cavity volume block structural diagram
Fig. 9 sensor construction figure
Sectional view (in Fig. 2, sensor clamping device A-A is to section) after the assembling of Figure 10 sensor clamping device
1-pipeline, 2-weld seam wherein
3-3PE anticorrosive coat, 4-guide rail hoop
5-fixed head, 6-coupling shaft
7-magnet-wheel, 8-stepper motor
9-preventing corrosion of repaired mouth layer, 10-driving wheel
11-scrambler, 12-axis of guide
13-pilot hole a, 14-sensor cavity volume piece
15-sensor, 16-approximate half-circular fluting
17-chute hole a, 18-rectangle fluting
19-pilot hole b, 20-chute hole b
21-pilot hole c, 22-spring
23-chute card, 24-steel band
25-fixing card column 26-fin
27-groove, 28-buttcover plate
Embodiment
Embodiment.
This routine device basic framework is processed by high-strength aluminum alloy material, the thick 5mm of isosceles triangle fixed head 5, bottom side length 30cm, high 20cm, chute hole a17 diameter 10mm, position is located on the perpendicular bisector on fixed head 5 bases, and two pilot hole a13 diameters are determined according to the assembling diameter of axle of magnet-wheel 7 and driving wheel 10; Coupling shaft 6 is by the assembly of two kinds of columns of different-diameter, stage casing column diameter 30mm, length is determined according to the width of preventing corrosion of repaired mouth layer width and driving wheel 10, the column diameter 9mm length 20mm at two ends, pilot hole b19 diameter 5mm on coupling shaft 6, the spacing of pilot hole b19 is set according to sensor size.
Described travel mechanism consists of stepper motor 8, scrambler 11 and driving wheel 10.Stepper motor 10 and scrambler 11 fit together, and scrambler 11 is increment of rotation formula scrambler, the driving torque that the model of stepper motor 10 needs according to device and power apolegamy; Driving wheel 10 diameter 60mm, wide 40mm, material supply section is selected plastics, and central slot 27 is the opening rectangle of the wide 10mm of dark 5mm.After assembling, the position that driving wheel 10 contacts with guide rail hoop 4 is 10mm at least apart from the base of fixed head 5.Totally two groups, travel mechanism, is separately fixed on two fixed heads 5, is mutually diagonal angle and distributes, and wherein stepper motor 8 and scrambler 11 are assemblied in fixed head 5 outsides, and driving wheel 10 is assemblied in fixed head 5 inner sides.
Described adsorbing mechanism is comprised of magnet-wheel 7, guide rail hoop 4.Magnet-wheel 7 is the column type rollers with magnetic force, and the size of diameter, width and central slot is consistent with driving wheel 10; Guide rail hoop 4 materials are steel, width is 45mm, thickness 7mm, the length of two steel bands 24 is set according to the semi-perimeter of different pipelines, and middle part fin 26 is the round rectangle of the wide 9mm of high 4mm, fixedly the high 20mm of card column 25 diameter 7mm, the high 40mm of buttcover plate 28, pilot hole on buttcover plate 28 arranges as required, and guide rail hoop 4 is stuck in joint coating on pipeline anticorrosive coat 9 both sides while using, and butt end is fixed with steel ring and screw and nut respectively; Two groups of magnet-wheels 7 are arranged on the fixed head 5 of basic framework both sides, and with driving wheel 10 cross-distribution, setting height(from bottom) is consistent with driving wheel 10.
Described sensor clamping device consists of the axis of guide 12, spring 22, sensor cavity volume piece 14 and sensor 15.The axis of guide 12 is spherical and cylindrical composite structure, and the size of the barrel portion of upper end is set with the Surface Contact preventing corrosion of repaired mouth layer 9 of coupling shaft 6 assembling and sensor 15 being applicable to; The spherical diameter 15mm of the axis of guide 12 lower ends.Sensor cavity volume piece 14 is a kind of shaped pieces, by upper end, offer the cylinder of approximate half-circular fluting 16 and cylinder that lower end offers rectangle fluting 18 combines, whole height of column 80mm, length and width are set according to sensor 15 sizes, wherein the size of upper end approximate half-circular fluting is according to the spherical diameter of the axis of guide 12 and the angle initialization of permission sensor 15 horizontal anomalous movements, the size of the rectangle fluting of hypomere is set according to sensor 15 sizes, pilot hole c21 diameter 3mm, the up and down scope that chute hole b20 size and position need according to sensor 15 is set.Sensor 15 is cuboid structures, length≤38mm, width≤25mm, height 50mm, the chute card 23 of the left and right sides is the right cylinder of diameter 4mm, the height of chute card 23 flushes with sensor cavity volume piece 14 outer walls the setting that is as the criterion with after assembling, and the position of chute card 23 allows up and down scope to determine according to height and the sensor 15 of spring 22.During the assembling of sensor clamping device, first the axis of guide 12, spring 22 and sensor 15 are placed in the middle of two sensor cavity volume pieces 14, then by 14 closed butt joints of two sensor cavity volume pieces, and by an integral body of the fixing formation of bolt for pilot hole c21.
During the operation of preventing corrosion of repaired mouth layer pick-up unit, first guide rail hoop 4 is fixed on to preventing corrosion of repaired mouth layer 9 both sides, in the hard-wired process of each side rails hoop 4, first pipeline 1 is placed in to two steel band 24 middle parts, one end of steel band 24 docking is with steel ring sleeve at two right cylinders that fixedly card column 25 forms, and the other end uses bolt and screw by two buttcover plate 28 closures.And then by apparatus main body across being adsorbed on guide rail hoop 4 at joint coating on pipeline place and by magnet-wheel 7, the groove 27 of driving wheel 10 and magnetic force 7 is stuck on the fin 26 of guide rail hoop.Last control step motor 8 drive unit main bodys are from buttcover plate 28 1 lateral movements of guide rail hoop 4 closures to opposite side, between moving period, by sensor 14, transmit preventing corrosion of repaired mouth layer 9 is tested, the azimuth information of sensor 15 with timer by scrambler 11 Real-time Obtainings in pipe circumference, coordinate again sensor 15 in the positional information of coupling shaft 6 and the testing result to preventing corrosion of repaired mouth layer 9 of sensor 15, realize quantitatively accurately detecting of preventing corrosion of repaired mouth layer 9 defect.After detection, can order about device and move on non-metallic gasket, thereby weaken absorption affinity at two groups of magnet-wheel 7 underlay non-metallic gaskets of device, make apparatus main body getaway hoop 4 and removed.
This example, through test, is carried out rapid scanning measurement to repaired mouth bonding quality, particularly bonding force in the situation that not destroying preventing corrosion of repaired mouth layer, measures efficiency high, and adaptive ability is strong, and defect quantitative is accurate.
Claims (6)
1. a joint coating on pipeline anticorrosive coat the cannot-harm-detection device for oil and gas pipeline preventing corrosion of repaired mouth layer bonding quality, is characterized in that this pick-up unit is comprised of basic framework, travel mechanism, adsorbing mechanism, sensor clamping device; Basic framework is the carrier of travel mechanism, adsorbing mechanism, sensor clamping device; Travel mechanism is to order about the power part of device walking; Sensor clamping device fixed test sensor; The absorption basis that pick-up unit is adsorbed in to the adsorbing mechanism at joint coating on pipeline place is arranged on preventing corrosion of repaired mouth layer (9) both sides, the carrier that the remainder of adsorbing mechanism and basic framework, the common formation of travel mechanism move around joint coating on pipeline anticorrosive coat (9) circumference; One end at basic framework is provided with travel mechanism, and sensor clamping device is arranged on middle part and the two ends of basic framework.
2. joint coating on pipeline anticorrosive coat the cannot-harm-detection device according to claim 1, is characterized in that described basic framework consists of two fixed heads (5) and a coupling shaft (6), connects into " work " font by coupling shaft (6) by two fixed heads (5); Fixed head (5) is isosceles triangular structure, and fixed head (5) is provided with 1 chute hole a (17) and two pilot hole a (13); Coupling shaft (6) is the assembly of two kinds of columns of different-diameter, the column diameter in stage casing is large and be provided with pilot hole b(19), the column diameter at two ends is little and be processed with screw thread, is placed on the chute hole a(17 of fixed head (5)) in realize the assembly connection of coupling shaft (6) and fixed head (5); Travel mechanism is connected with fixed head (5) by pilot hole a (13) with adsorbing mechanism, and coupling shaft (6) is connected with two fixed heads (5) by chute hole (17).
3. joint coating on pipeline anticorrosive coat the cannot-harm-detection device according to claim 1, is characterized in that described travel mechanism consists of stepper motor (8), scrambler (11) and driving wheel (10); Driving wheel (10) is cylindrical roller, and middle part is provided with the groove (27) of controlling for the running orbit of whole device; Totally two groups, travel mechanism, is separately fixed at two fixed heads (5) upper, is mutually diagonal angle and distributes, and wherein stepper motor (8) and speed reduction unit (11) are assemblied in fixed head (5) outside, and driving wheel (10) is assemblied in fixed head (5) inner side.
4. joint coating on pipeline anticorrosive coat the cannot-harm-detection device according to claim 1, is characterized in that described adsorbing mechanism is mainly comprised of magnet-wheel (7), guide rail hoop (4), magnet-wheel (7) is the column type roller with magnetic force, and middle part is provided with groove (27), guide rail hoop (4) is semi-circular strip of steel (24) formation by two same sizes, steel band (24) one end is provided with fixedly card column (25), the other end is provided with the buttcover plate (28) vertical with steel band end camber line, buttcover plate offers pilot hole on (28), after two steel bands (24) docking with two of one end fixedly card column (25) form a complete right cylinder, right cylinder overcoat steel ring is fixed connection, two buttcover plates (28) of the other end are combined closely and are realized closure with bolt, steel band (24) middle part is provided with fin (26), fin (26) provides guide channel for magnet-wheel (7) and driving wheel (10), during pick-up unit walking, the groove (27) of magnet-wheel (7) and driving wheel (10) is stuck on fin (26), totally two groups of adsorbing mechanisms, two groups of guide rail hoops (4) are arranged on respectively preventing corrosion of repaired mouth layer (9) both sides, and two groups of magnet-wheels (7) are arranged on the fixed head (5) of basic framework both sides, with travel mechanism cross-distribution.
5. joint coating on pipeline anticorrosive coat the cannot-harm-detection device according to claim 1, is characterized in that described sensor clamping device consists of the axis of guide (12), spring (22), sensor cavity volume piece (14) and sensor (15); The axis of guide (12) is ball body and cylindrical composite structure, the barrel portion of the upper end of the axis of guide (12) is two cylindrical assemblys of different-diameter, the right cylinder that diameter is larger is connected with the spherosome of the axis of guide (12), the cylinder end that diameter is less is processed with screw thread, mainly realize being connected of the axis of guide (12) and coupling shaft (6), by the pilot hole b(19 of coupling shaft (6)) axis of guide (12) is fixed on coupling shaft (6); It is the member that is connected sensor cavity volume piece (14) that the spheroidal body of the axis of guide (12) lower end divides; Sensor cavity volume piece (14) is the bare bones that forms the sensor cavity volume that holds sensor (15), sensor cavity volume piece (14) is a kind of shaped piece, by upper end, offering the cylinder that the cylinder of the spherical fluting of semicircular (16) and lower end offer rectangle fluting (18) combines, sensor cavity volume piece (14) lower end is provided with chute hole b (20), middle part is provided with pilot hole c (21), chute hole b (20) provides passage for sensor (15) moves up and down, and a complete sensor cavity volume is formed by two sensor cavity volume pieces (14) docking; Sensor (15) is the repaired mouth heat shrink sleeve detection part of a cuboid structure, sensor (15) is placed on the chute hole b(20 of sensor cavity volume piece (14) by the chute card (23) of the left and right sides) upper, the surperficial surrounding that sensor (15) contacts with preventing corrosion of repaired mouth layer (9) is fillet profile; During the assembling of sensor clamping device, first the axis of guide (12), spring (22) and sensor (15) are placed in the middle of two sensor cavity volume pieces (14), then by two sensor cavity volume pieces (14) closed butt joint, and by pilot hole c(21) with bolt, fix and form an integral body.
6. joint coating on pipeline anticorrosive coat the cannot-harm-detection device according to claim 1, is characterized in that being also equipped with scrambler (11); Pick-up unit is by the azimuth information of scrambler (11) Real-time Obtaining sensor (15) in pipe circumference, coordinate again sensor (15) in the positional information of coupling shaft (6) and the testing result to preventing corrosion of repaired mouth layer (9) of sensor (15), realize quantitatively accurately detecting of preventing corrosion of repaired mouth layer (9) defect.
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| CN201310088449.3A CN104062399B (en) | 2013-03-19 | 2013-03-19 | Nondestructive testing device for pipeline joint coating anticorrosive layer |
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| CN201310088449.3A CN104062399B (en) | 2013-03-19 | 2013-03-19 | Nondestructive testing device for pipeline joint coating anticorrosive layer |
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| CN104654019A (en) * | 2015-03-12 | 2015-05-27 | 成都大漠石油机械有限公司 | Mechanism for monitoring petroleum pipeline |
| CN104654022A (en) * | 2015-03-12 | 2015-05-27 | 成都大漠石油机械有限公司 | Safe monitoring device for petroleum pipeline |
| CN104676254A (en) * | 2015-03-12 | 2015-06-03 | 成都大漠石油机械有限公司 | Monitoring device easy for disassembly and assembly |
| CN104806821A (en) * | 2015-03-12 | 2015-07-29 | 成都大漠石油机械有限公司 | Supporting frame for oil pipeline |
| CN107131388A (en) * | 2016-02-29 | 2017-09-05 | 中国石油天然气集团公司 | Joint coating on pipeline heat shrinking sleeve support meanss |
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