CN103604022B - High-precision inner detecting device for seabed oil and gas pipeline flaws - Google Patents
High-precision inner detecting device for seabed oil and gas pipeline flaws Download PDFInfo
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- CN103604022B CN103604022B CN201310598517.0A CN201310598517A CN103604022B CN 103604022 B CN103604022 B CN 103604022B CN 201310598517 A CN201310598517 A CN 201310598517A CN 103604022 B CN103604022 B CN 103604022B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
- F16L55/28—Constructional aspects
- F16L55/30—Constructional aspects of the propulsion means, e.g. towed by cables
- F16L55/32—Constructional aspects of the propulsion means, e.g. towed by cables being self-contained
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
- F16L55/48—Indicating the position of the pig or mole in the pipe or conduit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L2101/00—Uses or applications of pigs or moles
- F16L2101/30—Inspecting, measuring or testing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
A high-precision inner detecting device for seabed oil and gas pipeline flaws is characterized in that an anti-collision head and a front power packing cup are connected to the front end of a body support shaft, the rear of the front power packing cup is connected with a floating magnetization detecting block through a hinge mechanism, and a lateral jacking spring is disposed on each of the front side and the rear side of the floating magnetization detecting block to form a floating magnetization circuit and a magnetic flux leakage detecting block unit. A finger probe is disposed on the floating magnetization detecting block. A guide groove and a limit ring are arranged at the rear end of the body support shaft. A rear power packing cup is disposed at the rear of the guide groove. The front packing cup and the rear packing cup jointly form a power drive system. A battery pack unit and an electronic recorder are respectively disposed at the front and the rear of a seal cabin in the body support shaft in an opposite insertion manner. A detector odometer wheel unit is mounted at the tail of the body support shaft. By the floating magnetization detecting structure, online inner detection of oil and gas pipeline flaws under complex working conditions can be well achieved.
Description
Technical field
The present invention relates to sea-bottom oil-gas pipeline detection technique field, be specifically related to detection device in sea-bottom oil-gas pipeline defect highi degree of accuracy.
Background technique
With the development of marine oil and gas exploitation technology, supporting sea-bottom oil-gas conveyance conduit technology is also constantly improving, and the safety of offshore oil pipeline is the key technology in this field.Because benthal oil-gas pipeline and land oil-gas pipeline exist very large different: the first has a big risk, this is because ocean petroleum pipeline difficulty of construction is large, cost is high, once reveal or blocking large to environmental disruption; It two is that operating mode is complicated, and sea-bottom oil-gas pipeline is generally laid according to seafloor terrain, and particularly pipeline exists erect riser during lower bolster, the elbow on platform is 1.5D radius of turn.This has higher passing capacity and pipe deforming adaptive capacity with regard to the internal detector requiring offshore oil pipeline on-line checkingi and use.Existing oil and gas pipes defect detector structural feature is fixed magnetization mandrel and magnetic conduction steel brush wheel form.Its representative to be application number be 200710118862.4 patent " high definition mechanical system of pipe leakage detector ", owing to adopting fixed magnetization mandrel form, make detector heavier, the diameter of non-deformable part and length also can be comparatively large, are not suitable for being applied in erect riser and tight-turning offshore oil defect of pipeline and detect.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide detection device in sea-bottom oil-gas pipeline defect highi degree of accuracy, adopting floating type magnetization detection architecture, solve well oil and gas pipes defect under complex working conditions online in test problems.
In order to achieve the above object, the technological scheme that the present invention takes is:
Detection device in sea-bottom oil-gas pipeline defect highi degree of accuracy, comprise body back shaft 2, body back shaft 2 front end connects anti-raming and front power leather cup 1, floating hinge mechanism 3 before front power leather cup 1 connects below, front floating hinge mechanism 3 detects block 5 with two groups of magnetization of floating and is connected, often before and after group floating magnetization detection block 5 side, floating magnetization, to jack-up spring 4, is detected block 5 by jack-up spring 4 and opens, form relocatable magnetization cycle and Magnetic Flux Leakage Inspecting module unit by installation side; Magnetization of floating detects block 5 installation finger probe 6 above, and the rear portion that magnetization of floating detects block 5 is slip form, installs guiding groove and limited ring in the rear end of body back shaft 2, retrains sideshake and the amount of moving up and down that magnetization of floating detects block 5; Power leather cup 9 after the rear portion of guiding groove is installed, front and back power leather cup together form power-driven system; In body back shaft 2 before and after seal hatch respectively to slotting installation cell bag unit 7 and electronic recorder 8, the electrode pair of cell bag unit 7 and electronic recorder 8 is inserted and is powered on to electronic recorder 8; At body back shaft 2 afterbody, detector mileage wheel unit 10 is installed.
Described floating magnetization detects block 5 and comprises magnet case 19, front twisted branch axle 11 is placed in magnet case 19 front end axis hole, front twisted seat 18 is bolted to magnet case 19 front end by interior angle, high-strength magnet 14 is placed on magnet case 19 top, fixed by magnetic pole protection apron 12, the middle magnetic pole beam 13 that uses is protected, magnetic pole protection apron 12 is fixed on front twisted seat 18 and magnet case 19, finger probe twisted branch seat 15 is fixed on magnet case 19, finger probe 16 is fixed on finger probe twisted branch seat 15, finger probe 16 is equipped with probe Line concentrator 21 below, after magnetic pole internal stop 17 is fixed on finger probe 16, wiring casing 20 is fixed with in the bottom of magnet case 19, the both sides live conductor sheet 22 of magnet case 19 and spring base hole 23, guide runner 24 after magnet case 19 afterbody is fixing, each assembly forms entirety centered by magnet case 19.
Described mileage wheel unit 10 comprises swing arm 27, swing arm 27 one end is connected with hinge base 25 by bearing pin, the other end is provided with mileage wheel 29, rotating coder 28 is positioned at mileage and takes turns 29 axis holes, stretched spring 26 one end connects swing arm 27, and the other end connects hinge base 25, and stretched spring 26 is by swing arm 27 pull-up, make mileage take turns 29 and compress metal pipe-wall, move in pipeline with detection device.
Described front floating hinge mechanism 3 is double-twisted structure, be made up of rotational slide hinge arms and rotating rocker, wherein double-twisted structure hinge arms lower end hinge is movable in the sliding-groove of fixing twisted seat, the matching gap of the sliding-groove of hinge and fixing twisted seat is 0.50 ~ 1 millimeter, the fixing twisted seat of front floating hinge mechanism 3 is fixed on the mounting point of body back shaft 2, the hinge arms of double-twisted structure is U-shaped structure, the sideshake of hinge arms and fixing twisted seat is 0.50 ~ 1 millimeter, rocking bar one end of double-twisted structure is rotated in fixing twisted seat, the other end and hinge arms are connected, the hinge axis hole at rocking bar two ends is Spielpassung with coordinating of hinge, gap is 0.10 ~ 0.20 millimeter, the sideshake of rocking bar and fixing twisted seat is 0.50 ~ 1 millimeter.
Described floating magnetization detects the side installation side of block 5 to jack-up spring cupport structure, often group floating magnetization detection block 5 coordinates front floating hinge mechanism 3 and rear guide chute structure, side is with two groups, front and back jack-up spring 4 jack-up mutually, specifically at magnet case side arrangement side direction jack-up spring base hole, jack-up spring 4 holddown spring bore bottom surface, mounting spring directional post in spring base hole, spring directional post and spring base hole lead and position-limiting action to 4, jack-up spring is two, prevent jack-up spring 4 from deviating from, mounting spring directional post in spring base hole, spring directional post and spring inside diameter gap are 0.5 ~ 1 millimeter, the gap of spring base hole and spring outer diameter is 1 ~ 2 millimeter.
Outside described front power leather cup 1 and rear power leather cup 9, stainless steel platen is installed, be pressed on the leather cup attachment face of body back shaft 2 by front power leather cup 1 and rear power leather cup 9, the front and back mounting distance of front power leather cup 1 and rear power leather cup 9 is 1 ~ 1.5 times of application internal diameter of the pipeline.
Described cell bag unit 7 and the sealing of the interior seal hatch of body back shaft 2 adopt hold to axial two seals form, sealing medium is O type rubber seal, and cell bag unit 7 drum surface pastes front and back twice lanyard, and lanyard material is teflon.
Described electronic recorder 8 and the sealing of the interior seal hatch of body back shaft 2 adopt hold to axial two seals form, sealing medium is O type rubber seal, and electronic recorder 8 drum surface pastes front and back twice lanyard, and lanyard material is teflon.
Described rear power leather cup 9 attachment face has cable passing hole, the cable of finger probe 6 detects the pop one's head in cable that synthesizes after Line concentrator doubling process and cable plug of block 5 through magnetization of floating and is inserted on the cable socket of built-in inspection electronic recorder bared end by this cable-through hole, connects and measures and record circuit.
Described cable plug and cable socket are withstand voltage rubber plug under water, socket, and quality of rubber materials is nitrile rubber, and pressure resistance is 0 ~ 20 MPa under water.
Compared with fixed magnetization mandrel type detection device, inventive pipeline passing capacity greatly increases, by having more large deformation and more tight-turning pipeline, also because floating structure comparatively fixed magnetization mandrel type lightweight construction, so more adapt to the marine oil and gas pipeline defects detection having vertical pipeline section.
The present invention realizes floating type magnetization and detection, and this structural type is monomer floating type pipeline magnetic flux leakage detection device.To drive function, magnetization measurement function and electronic recorder, cell bag and travel range metering installation consist of monomer unit, at utmost simplify detector joint number and length.In actual defect inspection engineering, adapt to ocean platform work surface narrow and small, launch and reclaim simple job requirements.This pipeline magnetic flux leakage detection device eliminates the transition shaft coupling existed in multi-section structure and connects the unsteady attitude factor caused, and pipeline passing capacity is strengthened greatly.
Accompanying drawing explanation
Fig. 1 is expansion sectional view of the present invention.
Fig. 2 is that the present invention's magnetization of floating detects the structural representation of module unit.
Fig. 3 is the structural representation of mileage wheel unit 10 of the present invention.
Embodiment
The present invention is described in detail, for detection device explanation in 18 cun (457 millimeters) floating type sea-bottom oil-gas pipeline defect highi degree of accuracy below in conjunction with drawings and Examples.
Long 871 millimeters of detection device entirety in 18 cun of floating type sea-bottom oil-gas pipeline defect highi degree of accuracy, wherein fixed body length is 803 millimeters, magnetization of floating detects block 5 rising maximum diameter 450 millimeters, magnetization of floating detects block 5 working diameter 428 millimeters, magnetization of floating detects block 5 and shrinks minimum diameter 320 millimeters, the maximum fixed body diameter of detection device 315 millimeters, detection device overall weight 260 kilograms.
With reference to Fig. 1, in 18 cun of floating type sea-bottom oil-gas pipeline defect highi degree of accuracy, detection device comprises body back shaft 2, and with body back shaft 2 for supporting, body back shaft 2 front end connects anti-raming and front power leather cup 1, floating hinge mechanism 3 before front power leather cup 1 connects below; Front floating hinge mechanism 3 tangles two groups of magnetization of floating and detects blocks 5, and often group magnetization of floating detects installation side before and after block 5 side and, to jack-up spring 4, opened by floating magnetization detection block 5, form relocatable magnetization cycle and Magnetic Flux Leakage Inspecting module unit by jack-up spring 4; Magnetization of floating detects block 5 and installs finger probe 6 above; In order to ensure to float the reliability of magnetizing and detecting the floating distortion of block 5, the rear portion that structure floating moves magnetization detection block 5 is slip form, installs guiding groove and limited ring in the rear end of body back shaft 2, constraining floating magnetization to detect the sideshake of block 5 and the amount of moving up and down; Power leather cup 9 after the rear portion of guiding groove is installed, front and back power leather cup together form the power-driven system of detection device; In body back shaft 2, installed cell bag unit 7 and electronic recorder 8 respectively before and after seal hatch to slotting, the electrode pair of cell bag unit 7 and electronic recorder 8 is inserted and is powered on to electronic recorder 8; At body back shaft 2 afterbody, detector mileage wheel unit 10 is installed.
With reference to Fig. 2, magnetization of floating detects block 5 and comprises magnet case 19, front twisted branch axle 11 is placed in magnet case 19 front end axis hole, front twisted seat 18 is bolted to magnet case 19 front end by interior angle, high-strength magnet 14 is placed on magnet case 19 top, fixed by magnetic pole protection apron 12, the middle magnetic pole beam 13 that uses is protected, magnetic pole protection apron 12 uses screw to be fixed on front twisted seat 18 and magnet case 19, finger probe twisted branch seat 15 is fixed on magnet case 19, finger probe 16 is bolted on finger probe twisted branch seat 15, finger probe 16 is equipped with probe Line concentrator 21 below, after magnetic pole internal stop 17 is fixed on finger probe 16, wiring casing 20 is fixed with in the bottom of magnet case 19, the both sides live conductor sheet 22 of magnet case 19 and spring base hole 23, guide runner 24 after magnet case 19 afterbody is fixing, each assembly forms entirety centered by magnet case 19.
When floating magnetization detection block 5 fits metal pipe-wall, metal pipe-wall, front magnetic pole N pole, magnet case 19 and rear magnetic pole S pole form closed flux circuit, finger probe 16 is in the middle part of magnetic circuit, when metal pipe-wall has metal loss defects, magnetic line of force torsional deformation, the checkout value being in the finger probe 16 in the middle part of magnetic circuit will change, by the contrast with zero defect checkout value, just can draw shape and the size of metal loss defects, the tungsten-carbide powder of the magnetic pole protection apron surface spraying magnetic conduction of magnetic pole wherein, do Wear-resistant Treatment, coating thickness 0.15 ~ 0.25 millimeter, when the non-magnetic stupalith of finger box surface spraying of finger probe 6, do Wear-resistant Treatment, coating thickness 0.10 ~ 0.20 millimeter.
With reference to Fig. 3, the described responsible measurement to detector distance travelled of mileage wheel unit 10 and record, and Magnetic Flux Leakage Inspecting aggregation of data, provide metal loss defects position.Mileage wheel unit 10 comprises hinge base 25, stretched spring 26, swing arm 27, rotating coder 28, mileage wheel 29.Swing arm 27 one end is connected with hinge base 25 by bearing pin, the other end is provided with mileage wheel 29, rotating coder 28 is positioned at mileage and takes turns 29 axis holes, stretched spring 26 is by swing arm 27 pull-up, make mileage take turns 29 and compress metal pipe-wall, move with detection device in pipeline, mileage wheel 29 rotates, rotating coder 28 records rotation angle and the number of turns, moves mileage number by calculating detection device.
Described front floating hinge mechanism 3 is double-twisted structure, be made up of rotational slide hinge arms and rotating rocker, wherein double-twisted structure hinge arms lower end hinge is movable in the sliding-groove of fixing twisted seat, the matching gap of the sliding-groove of hinge and fixing twisted seat is 0.50 ~ 1 millimeter, the fixing twisted seat of front floating hinge mechanism 3 is fixed on the mounting point of detector body back shaft by location flat key and screw, the hinge arms of double-twisted structure is U-shaped structure, the sideshake of hinge arms and fixing twisted seat is 0.50 ~ 1 millimeter, rocking bar one end of double-twisted structure is rotated at fixing twisted seat, the rocking bar the other end and hinge arms are connected, the hinge axis hole at rocking bar two ends is Spielpassung with coordinating of hinge, gap is 0.10 ~ 0.20 millimeter, the sideshake of rocking bar and fixing twisted seat is 0.50 ~ 1 millimeter.Such structural design is different from single hinge structure and is: when hinge arms swings up and down, shorten the magnetization detection module unit that floats and move forward and backward distance, after making slide pad, guide runner length reduces, also reduce the thickness of the slip restraining groove on detection device back shaft simultaneously, ensure that join strength and the reliability of detection device, also before controlling and shortening detection device, the mounting distance of rear power leather cup, thus acquisition detection device crosses the good sealing of right angle bend, reduction detection device crosses power loss during bend, ensure the bend passing capacity of detection device.
Magnetization of floating detects the side installation side of block 5 to jack-up spring cupport structure, often group floating magnetization detection block 5 coordinates front floating hinge mechanism 3 and rear guide chute structure, side is with two groups, front and back jack-up spring 4 jack-up mutually, flexibly connect, achieve the effect that fluctuates, specifically at magnet case side arrangement side direction jack-up spring base hole, jack-up spring 4 holddown spring bore bottom surface, mounting spring directional post in spring base hole, spring directional post and spring base hole lead and position-limiting action to 4, jack-up spring is two, prevent jack-up spring 4 from deviating from, mounting spring directional post in spring base hole.Spring directional post and spring inside diameter gap are 0.5 ~ 1 millimeter, and the gap of spring base hole and spring outer diameter is 1 ~ 2 millimeter.The advantage of such design is that slide pad can better be fitted tube wall, adapts to the local deformation of pipeline, improves the passing capacity of detection device in pipeline.In addition, support with side compressible jack-up spring 4 and instead of rear hinge rigid support, also strengthen slide pad adaptive capacity under complicated applied force situation in pipeline, substantially increase structure of the detecting device intensity.
Before in sea-bottom oil-gas pipeline defect highi degree of accuracy, detection device often organizes slide pad cooperation, there be slip and the limit structure of rear end in floating hinge mechanism 3, be made up of with the guide chute and limited ring being arranged on rear power leather cup 9 front end the bar shaped slide block being fixed on magnetization detection block 5 rear end of floating, magnetization of floating detects block 5 when activity, bar shaped slide block is upper and lower in guiding groove, slide anteroposterior, do not deviate from guiding groove, guiding groove top is coated with limited ring, the stroke up and down of restriction slide block, thus constraint is floated, magnetization detects the domain of walker of block 5, the slip sideshake of bar shaped slide block and rear guide chute is 1 ~ 2 millimeter, wherein bar shaped slide block is S304 stainless steel material, surface passivating treatment, rear guide chute is tin bronze or manganese bronze material.Such structure can make the pitching obtained before and after slide pad within the scope of several angle, the front and back magnetic pole on slide pad and movable probe is fitted tube wall better, reaches better Detection results.
Outside described front power leather cup 1 and rear power leather cup 9, stainless steel platen is installed, be pressed on the leather cup attachment face of test device body back shaft 2 by connecting bolt by front power leather cup 1 and rear power leather cup 9, the front and back mounting distance of front power leather cup 1 and rear power leather cup 9 is 1 ~ 1.5 times of detection device application internal diameter of the pipeline.
Described cell bag unit 7 and the sealing of the interior seal hatch of body back shaft 2 adopt hold to axial two seals form, sealing medium is O type rubber seal, and cell bag unit 7 drum surface pastes front and back twice lanyard, and lanyard material is teflon.
Described electronic recorder 8 and the sealing of the interior seal hatch of body back shaft 2 adopt hold to axial two seals form, sealing medium is O type rubber seal, and electronic recorder 8 drum surface pastes front and back twice lanyard, and lanyard material is teflon.
Described rear power leather cup 9 attachment face has cable passing hole, the cable that the cable of finger probe 6 synthesizes after magnetization of floating detects the probe Line concentrator 21 doubling process of block 5 and cable plug are inserted on the cable socket of built-in inspection electronic recorder bared end by this cable-through hole, connect and measure and record circuit.By cable passing hole through after cable, block with quick-drying silicone rubber, ensureing can not pressure release before and after power leather cup.
Described cable plug and cable socket are withstand voltage rubber plug under water, socket, and quality of rubber materials is nitrile rubber, and pressure resistance is 0 ~ 20 MPa under water.
Working principle of the present invention is:
Magnetization of floating detects block 5 and to fit metal pipe-wall, now metal pipe-wall, front magnetic pole N pole, magnet case 19 and rear magnetic pole S pole form closed flux circuit, finger probe 6 is in the middle part of magnetic circuit, when metal pipe-wall has metal loss defects, magnetic line of force torsional deformation, the checkout value being in the finger probe 6 in the middle part of magnetic circuit will change, by the contrast with zero defect checkout value, just can draw shape and the size of metal loss defects, the cable of finger probe 6 detects the pop one's head in cable that synthesizes after Line concentrator doubling process and cable plug of block 5 through magnetization of floating and is inserted on the cable socket of built-in inspection electronic recorder 8 bared end by this cable-through hole, connect and measure and record circuit, this detection device relies on fluids within pipes to promote front power leather cup 1 and rear power leather cup 9 moves in pipeline, mileage wheel unit 10 moves in pipeline with detection device, mileage wheel 29 rotates and drives rotating coder 28 to rotate, thus recording angular and the number of turns, move mileage number by can be calculated detection device, thus the defect of pipeline location realizing location, detection device position and detect.
Claims (10)
1. detection device in sea-bottom oil-gas pipeline defect highi degree of accuracy, comprise body back shaft (2), it is characterized in that: body back shaft (2) front end connects anti-raming and front power leather cup (1), floating hinge mechanism (3) before front power leather cup (1) connects below, front floating hinge mechanism (3) is detected block (5) with two groups of magnetization of floating and is connected, before and after often organizing magnetization detection block (5) side of floating, installation side is to jack-up spring (4), by jack-up spring (4) will float magnetization detect block (5) open, form relocatable magnetization cycle and Magnetic Flux Leakage Inspecting module unit, magnetization of floating detects block (5) and installs finger probe (6) above, the rear portion that magnetization of floating detects block (5) is slip form, install guiding groove and limited ring in the rear end of body back shaft (2), the floating magnetization of constraint detects sideshake and the amount of moving up and down of block (5), power leather cup (9) after the rear portion of guiding groove is installed, front and back power leather cup together form power-driven system, in body back shaft (2) before and after seal hatch respectively to slotting installation cell bag unit (7) and electronic recorder (8), the electrode pair of cell bag unit (7) and electronic recorder (8) is inserted and is powered on to electronic recorder (8), at body back shaft (2) afterbody, detector mileage wheel unit (10) is installed.
2. detection device in sea-bottom oil-gas pipeline defect highi degree of accuracy according to claim 1, it is characterized in that: described floating magnetization detects block (5) and comprises magnet case (19), front twisted branch axle (11) is placed in magnet case (19) front end axis hole, front twisted seat (18) is fixed on magnet case (19) front end, high-strength magnet (14) is placed on magnet case (19) top, fixed by magnetic pole protection apron (12), middle use magnetic pole beam (13) protection, magnetic pole protection apron (12) is fixed on front twisted seat (18) and magnet case (19), finger probe twisted branch seat (15) is fixed on magnet case (19), finger probe (16) is fixed on finger probe twisted branch seat (15), finger probe (16) is equipped with probe Line concentrator (21) below, after magnetic pole internal stop (17) is fixed on finger probe (16), wiring casing (20) is fixed with in the bottom of magnet case (19), both sides live conductor sheet (22) of magnet case (19) and spring base hole (23), guide runner (24) after magnet case (19) afterbody is fixing, each assembly forms entirety centered by magnet case (19).
3. detection device in sea-bottom oil-gas pipeline defect highi degree of accuracy according to claim 1, it is characterized in that: described mileage wheel unit (10) comprises swing arm (27), swing arm (27) one end is connected with hinge base (25) by bearing pin, the other end is provided with mileage wheel (29), rotating coder (28) is positioned at mileage wheel (29) axis hole, stretched spring (26) one end connects swing arm (27), the other end connects hinge base (25), stretched spring (26) is by swing arm (27) pull-up, make mileage take turns (29) and compress metal pipe-wall, move in pipeline with detection device.
4. detection device in sea-bottom oil-gas pipeline defect highi degree of accuracy according to claim 1, it is characterized in that: described front floating hinge mechanism (3) is double-twisted structure, be made up of rotational slide hinge arms and rotating rocker, wherein double-twisted structure hinge arms lower end hinge is movable in the sliding-groove of fixing twisted seat, the matching gap of the sliding-groove of hinge and fixing twisted seat is 0.50 ~ 1 millimeter, the fixing twisted seat of front floating hinge mechanism (3) is fixed on the mounting point of body back shaft (2), the hinge arms of double-twisted structure is U-shaped structure, the sideshake of hinge arms and fixing twisted seat is 0.50 ~ 1 millimeter, rocking bar one end of double-twisted structure is rotated in fixing twisted seat, the other end and hinge arms are connected, the hinge axis hole at rocking bar two ends is Spielpassung with coordinating of hinge, gap is 0.10 ~ 0.20 millimeter, the sideshake of rocking bar and fixing twisted seat is 0.50 ~ 1 millimeter.
5. detection device in sea-bottom oil-gas pipeline defect highi degree of accuracy according to claim 1, it is characterized in that: described floating magnetization detects the side installation side of block (5) to jack-up spring cupport structure, often group is floated to magnetize and is detected block (5) the front floating hinge mechanism (3) of cooperation and rear guide chute structure, side is with two groups, front and back jack-up spring (4) jack-up mutually, specifically at magnet case side arrangement side direction jack-up spring base hole, jack-up spring (4) holddown spring bore bottom surface, mounting spring directional post in spring base hole, spring directional post and spring base hole play two guiding and position-limiting action to jack-up spring (4), prevent jack-up spring (4) from deviating from, mounting spring directional post in spring base hole, spring directional post and spring inside diameter gap are 0.5 ~ 1 millimeter, the gap of spring base hole and spring outer diameter is 1 ~ 2 millimeter.
6. detection device in sea-bottom oil-gas pipeline defect highi degree of accuracy according to claim 1, it is characterized in that: stainless steel platen is installed in described front power leather cup (1) and rear power leather cup (9) outside, be pressed on the leather cup attachment face of body back shaft (2) by front power leather cup (1) and rear power leather cup (9), the front and back mounting distance of front power leather cup (1) and rear power leather cup (9) is 1 ~ 1.5 times of application internal diameter of the pipeline.
7. detection device in sea-bottom oil-gas pipeline defect highi degree of accuracy according to claim 1, it is characterized in that: the sealing of the interior seal hatch of described cell bag unit (7) and body back shaft (2) adopt hold to axial two seals form, sealing medium is O type rubber seal, cell bag unit (7) drum surface pastes front and back twice lanyard, and lanyard material is teflon.
8. detection device in sea-bottom oil-gas pipeline defect highi degree of accuracy according to claim 1, it is characterized in that: the sealing of the interior seal hatch of described electronic recorder (8) and body back shaft (2) adopt hold to axial two seals form, sealing medium is O type rubber seal, electronic recorder (8) drum surface pastes front and back twice lanyard, and lanyard material is teflon.
9. detection device in sea-bottom oil-gas pipeline defect highi degree of accuracy according to claim 1, it is characterized in that: described rear power leather cup (9) attachment face has cable passing hole, the cable of finger probe (6) detects through magnetization of floating the cable that synthesizes after block (5) probe Line concentrator doubling process and cable plug is inserted on the cable socket of built-in inspection electronic recorder bared end by this cable-through hole, connects and measures and record circuit.
10. detection device in sea-bottom oil-gas pipeline defect highi degree of accuracy according to claim 9, is characterized in that: described cable plug and cable socket are withstand voltage rubber plug under water, socket, and quality of rubber materials is nitrile rubber, and pressure resistance is 0 ~ 20 MPa under water.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310598517.0A CN103604022B (en) | 2013-11-23 | 2013-11-23 | High-precision inner detecting device for seabed oil and gas pipeline flaws |
| US14/759,300 US10030804B2 (en) | 2013-11-23 | 2014-09-16 | Inner detecting device for subsea oil and gas pipeline |
| GB1516894.1A GB2527696B (en) | 2013-11-23 | 2014-09-16 | An inner detecting device for subsea oil and gas pipeline |
| PCT/CN2014/086655 WO2015074456A1 (en) | 2013-11-23 | 2014-09-16 | An inner detecting device for subsea oil and gas pipeline |
| CA2888756A CA2888756C (en) | 2013-11-23 | 2014-09-16 | An inner detecting device for subsea oil and gas pipeline |
| JP2015548190A JP6154911B2 (en) | 2013-11-23 | 2014-09-16 | Internal detector for subsea oil and gas pipelines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310598517.0A CN103604022B (en) | 2013-11-23 | 2013-11-23 | High-precision inner detecting device for seabed oil and gas pipeline flaws |
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| Publication Number | Publication Date |
|---|---|
| CN103604022A CN103604022A (en) | 2014-02-26 |
| CN103604022B true CN103604022B (en) | 2015-07-15 |
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| CN201310598517.0A Active CN103604022B (en) | 2013-11-23 | 2013-11-23 | High-precision inner detecting device for seabed oil and gas pipeline flaws |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015074456A1 (en) * | 2013-11-23 | 2015-05-28 | Tsinghua University | An inner detecting device for subsea oil and gas pipeline |
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