CN115308308B - Diesel pipeline corrosion prevention detection device and application method thereof - Google Patents
Diesel pipeline corrosion prevention detection device and application method thereof Download PDFInfo
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- CN115308308B CN115308308B CN202211231157.6A CN202211231157A CN115308308B CN 115308308 B CN115308308 B CN 115308308B CN 202211231157 A CN202211231157 A CN 202211231157A CN 115308308 B CN115308308 B CN 115308308B
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- 238000001514 detection method Methods 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005536 corrosion prevention Methods 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 238000003825 pressing Methods 0.000 claims abstract description 22
- 238000005507 spraying Methods 0.000 claims abstract description 17
- 230000005389 magnetism Effects 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 239000002283 diesel fuel Substances 0.000 claims abstract description 4
- 239000007822 coupling agent Substances 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 9
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 230000007797 corrosion Effects 0.000 claims description 7
- 238000005260 corrosion Methods 0.000 claims description 7
- 230000003628 erosive effect Effects 0.000 claims description 4
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- 230000001174 ascending effect Effects 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 abstract description 2
- 238000002834 transmittance Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 85
- 239000012530 fluid Substances 0.000 description 10
- 239000010779 crude oil Substances 0.000 description 9
- 238000005192 partition Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000011550 stock solution Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
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- 239000003292 glue Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000035699 permeability Effects 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
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- 239000002994 raw material Substances 0.000 description 1
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- 235000013555 soy sauce Nutrition 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
- G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
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- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Health & Medical Sciences (AREA)
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
The invention relates to the technical field of oil pipe corrosion prevention detection, in particular to a diesel oil pipeline corrosion prevention detection device and a using method thereof, wherein the diesel oil pipeline corrosion prevention detection device comprises an internal structure and an external structure, the internal structure comprises a prismatic reflection piece, the inner side of the peripheral surface of the prismatic reflection piece is provided with magnetism, the external structure comprises an axial driving piece, a circumferential rotating piece and detection parts, the axial driving piece is axially connected to the circumferential rotating piece, and the tail end of the circumferential rotating piece is circumferentially provided with a plurality of detection parts at equal intervals; the device has the advantages that: the radial telescopic piece is adopted to push the spraying assembly and the detection assembly inwards, so that the problem of poor ultrasonic wave transmittance can be solved by spraying liquid out of the spraying assembly, and meanwhile, the arc-shaped pressing block is preferentially pushed out before detection, so that circumferential deviation of the axial driving piece during detection is prevented, and the accuracy of a detection result is improved; the prismatic reflecting piece is pushed to move axially through the magnetism of the second magnetic block, and the magnetic positioning piece can ensure that all reflecting surfaces of the prismatic reflecting piece are aligned to the detection structure before detection, so that the accuracy of ultrasonic signal transmission is improved.
Description
Technical Field
The invention relates to a diesel pipeline corrosion prevention detection device and a using method thereof, in particular to a device for performing ultrasonic detection on the wall thickness of an oil pipe from outside to inside by additionally arranging a prismatic reflection piece and a using method for operating the pipeline corrosion prevention detection device.
Background
Corrosion of equipment by sour crude oil during petroleum refining is a common problem that needs to be addressed in each refinery. The corrosion problem is a major factor affecting the long-term operation of the plant due to the progressive deterioration of the raw materials. Crude oil has two basic parameters: density and viscosity. The light weight and the heavy weight of the crude oil are divided according to the density, and the viscosity of the crude oil is divided according to the viscosity; crude oil with low viscosity is similar to soy sauce, and the crude oil has the advantages of good quality, easy exploitation and the like; crude oil with high viscosity is similar to glue, the asphalt content of the crude oil is high, extraction is difficult, and the quality of the extracted product is poor. When crude oil with low viscosity is transported, an oil delivery pipe is easy to break after being corroded, so that property loss is caused, and casualties are caused if the oil delivery pipe is serious, so that the oil delivery pipe needs to be regularly subjected to thickness detection to judge whether the oil delivery pipe is seriously corroded.
The invention with the publication number of CN 113531404B discloses novel petroleum pipe anticorrosion quality inspection equipment for petroleum exploitation, which comprises arc-shaped partition plates, U-shaped partition plates, a first protection cover, a second protection cover and the like, wherein three arc-shaped partition plates are fixedly connected between the first protection cover and the second protection cover, one U-shaped partition plate is fixedly connected between two adjacent arc-shaped partition plates, and two side walls of each U-shaped partition plate are fixedly connected with the first protection cover and the second protection cover respectively. The shuttle-shaped mounting shell can reduce the resistance brought by liquid, so that the shuttle-shaped mounting shell can move accurately, liquid in a detection area is discharged firstly and a detection part is attached to the inner wall of an oil pipeline during detection, the loss of liquid media and long-distance transmission to ultrasonic waves is avoided, and the detection data is accurate. According to the invention, the detection piece is arranged in the oil pipe and is detected from inside to outside, so that the oil pipe is detached before detection, and then the detection piece is placed in the oil pipe for detection, so that the workload is greatly increased, and the oil can leak to pollute the environment; the device also mentions that air is pumped into a detection area through the air feeding module in detection, but the probe cannot be directly coupled with the surface of the pipe material because the pipe wall is of an arc-shaped structure, and the detection precision is poor because the transmissivity of ultrasonic waves transmitted from the air to the solid is very low.
If the detection assembly is arranged externally, the pipe wall detection is carried out in an outside-in mode, a reflection structure needs to be additionally arranged in the pipe wall, but the internal ultrasonic reflection structure is not easy to follow the detection assembly to carry out axial driven; and the reflecting surface is easy to rotate circumferentially, which causes the inaccuracy of the information received by the ultrasonic receiver.
Disclosure of Invention
In order to solve the problems, the application provides a diesel pipeline corrosion prevention detection device and a using method thereof, wall thickness detection of an oil pipe is carried out in an outside-in mode, comprehensiveness and accuracy of detection are further improved, and whether the oil conveying pipe is seriously corroded is further judged.
An anticorrosion detection device for a diesel oil pipeline comprises an internal structure and an external structure relative to an oil pipe, wherein the internal structure comprises a prismatic reflecting piece, the peripheral surface of the prismatic reflecting piece is of a regular prismatic structure, and the inner side of the peripheral surface is magnetic; the outer structure comprises an axial driving piece, a circumferential rotating piece and detection parts, the axial driving piece is axially connected to the circumferential rotating piece, a plurality of detection parts are arranged at the end of the circumferential rotating piece in a circumferential equidistant mode, each detection part is composed of a magnetic positioning piece and a detection assembly, and the magnetic positioning piece is opposite to the magnetic of the adjacent side of the prismatic reflection piece.
Furthermore, the ultrasonic generator of the detection assembly is provided with one or more ultrasonic receivers, and the magnetic positioning piece is fixedly arranged between the ultrasonic generator and the ultrasonic receivers.
The prismatic reflection piece comprises a prismatic body, a reflection plate, a first magnetic block, a first annular bulge and a flow stabilizing structure, wherein the inner side of the prismatic body is axially provided with a liquid guide hole, and the flow stabilizing structure is additionally arranged in the liquid guide hole.
Furthermore, all install first magnetic block additional on each global of prism, and the first magnetic block outside is equipped with the reflecting plate, and the stationary flow structure includes a plurality of whirl board and annular current-sharing board, and the whirl board evenly lays along the circumference equidistance of drain hole, and the radial equidistance of annular current-sharing board sets up, and it is a plurality of with each whirl board radial equidistance partition, and the stationary flow structure one end of keeping away from the axial driving piece sets up to the concave surface form.
The oil pipe is characterized by further comprising an end cover arranged at the end part of the oil pipe, the end cover comprises a second annular bulge, a flange, a guide inclined plane and a sealing ring which are axially communicated, the flange is fixedly connected to one side of the second annular bulge, the guide inclined plane is arranged in a concave shape on the other side of the second annular bulge, and the sealing ring is arranged on the outer circumferential surface of the second annular bulge in the circumferential direction.
The axial driving piece comprises a first annular body, an arc-shaped driving wheel, a first motor, driving gears, a second motor and a fixed ring block, wherein the end part of the first annular body is provided with the fixed ring block, the inner side of the first annular body is provided with a plurality of driving parts along the circumferential equidistance, each driving part comprises the arc-shaped driving wheel and the first motor used for controlling the rotation of the arc-shaped driving wheel, the outer end part of the fixed ring block is provided with a plurality of driving gears along the circumferential equidistance, the inner end part of the fixed ring block is fixedly provided with the second motor, and at least one driving gear is connected to the output end of the second motor.
The circumferential rotating piece comprises a boss-shaped second annular body, a waist-shaped outer hole, a waist-shaped inner hole and a toothed ring, the narrow-diameter end of the second annular body is provided with the toothed ring, the end face of the wide-diameter end of the second annular body is provided with a plurality of waist-shaped holes along the circumferential direction, the waist-shaped holes extend along the radial direction, each waist-shaped hole comprises a waist-shaped outer hole and a waist-shaped inner hole, and the width of each waist-shaped inner hole is greater than that of each waist-shaped outer hole.
The radial telescopic part comprises three arc-shaped supports connected end to end, a telescopic driving part is arranged at one end of each arc-shaped support, a rotatable connector is arranged at the other end of each arc-shaped support, the output end of the telescopic driving part is connected with a push plate, and the tail end of the push plate of the previous arc-shaped support is connected with the connector of the next arc-shaped support.
Furthermore, the middle section of the arc-shaped support is provided with an axially-communicated screw hole, the inner side of the middle section is connected with an arc-shaped pressing block through a telescopic rod, a spring is sleeved outside the telescopic rod, and the arc-shaped pressing block is internally provided with magnetism which is the same as that of the adjacent side of the prismatic reflecting piece.
Furthermore, the connecting piece is formed by cylinder and lead screw axial rigid coupling, and the cylinder side is on a parallel with and has seted up square groove radially, and the tip of cylinder sets up to T type slider, and the wide footpath end and the waist type hole sliding connection of T type slider, and its narrow footpath end sliding connection is in waist type outer hole.
Still include spray assembly, spray assembly is from last to being equipped with connecting rod, stock solution storehouse and casing down in proper order, and the casing internal cover is equipped with the liquid outlet of detection part and electrified magnet valve, and the liquid outlet communicates in the stock solution storehouse, and the connecting rod cover is located on the cylinder, and its square hugs closely in square groove, and the casing is the under shed, and its bottom both sides rotate respectively and are equipped with the clamp plate, and install the elastic sealing pad between clamp plate and the casing additional.
The ultrasonic generator is characterized by further comprising a controller, wherein the input end of the controller is electrically connected to the ultrasonic receiver, and the output end of the controller is electrically connected to the ultrasonic generator, the electromagnetic valve, the first motor, the second motor and the telescopic driving part.
A use method of a diesel pipeline corrosion prevention detection device in multi-point detection specifically comprises the following steps:
s1, a radial expansion piece is arranged at an end cover of an oil pipe;
s2, injecting a coupling agent into the liquid storage bin, wherein the coupling agent is water in the scheme;
s3, in the oil transportation state, the prismatic reflection piece is tightly attached to the end cover and is centered on the inner side of the oil pipe;
s4, when the oil in the oil pipe stops being transported, the oil tends to be uniform under the action of the prismatic reflection piece and is in a standing state;
s5, controlling the first motor to be started, and enabling the arc driving wheel to rotate and drive the axial driving piece to axially move along the oil pipe;
s6, under the magnetic pushing of the arc-shaped pressing block and the magnetic pulling of the magnetic positioning piece, the prismatic reflection piece in the oil pipe moves along with the axial driving piece;
s7, the controller electrically controls the ultrasonic generator to send out signals, ultrasonic waves pass through the side wall of the oil pipe and then reach the ultrasonic receiver through the reflecting plate, and the wall thickness of the oil pipe at the position is judged according to the time interval for receiving the ultrasonic waves;
s8, the detection process is as follows: after the detection subassembly single gathered three ascending department wall thicknesses in week, the circumference rotating member rotated 60 to accomplish the wall thickness collection of equidistance circumference six departments on the oil pipe:
s9, moving the axial driving piece for a specified distance in each axial direction, and immediately repeating the detection process of the S8;
s10, the collected wall thickness data are classified according to the upper half side and the lower half side of the oil pipe, namely the wall thickness data on the lower half side of the oil pipe are circumferentially compared within the same axial distance; performing axial comparison on the wall thickness data on the upper half side of the oil pipe in the same circumferential height;
and S11, when the time interval representing the wall thickness data has large deviation, marking the position, and judging whether serious erosion occurs in the position in subsequent detection.
A use method of a diesel pipeline corrosion prevention detection device in single-point detection specifically comprises the following steps:
s1, when single-point detection is carried out, the telescopic driving part acts to enable the push plate to contract, and then the arc-shaped support is folded inwards;
s2, limiting the moving direction of the arc-shaped pressing block through the waist-shaped inner hole and the connecting piece, and offsetting the direction limitation generated by the original shrinkage through the rotatable connecting head;
s3, radially extruding the oil pipe by the arc-shaped pressing block before the spraying assembly so as to fix the detection position before detection;
s4, the spraying assembly is radially attached to the oil pipe, a detection space is formed in the spraying assembly, and a coupling agent is introduced through a liquid outlet;
s5, detecting the action of the assembly to start wall thickness detection.
Compared with the prior art, the invention has the following beneficial technical effects:
1. by adopting the detection assembly to detect the wall thickness of the oil pipe from outside to inside, the problems of air mixing and oil product leakage caused by frequently disassembling the oil pipe can be effectively avoided on the premise of ensuring the detection precision;
2. according to the invention, the radial telescopic piece is adopted to push the spraying assembly and the detection assembly inwards, so that the problem of poor ultrasonic wave transmittance can be solved by spraying liquid from the spraying assembly, and meanwhile, the arc-shaped pressing block is preferentially pushed out before detection, so that circumferential deviation of the axial driving piece during detection is prevented, and the accuracy of a detection result is improved.
3. According to the invention, the prismatic reflecting member with the first magnetic block is magnetically pushed to axially move by the second magnetic block in the arc-shaped pressing block, and the magnetic positioning piece before detection can ensure that each reflecting surface of the prismatic reflecting member is aligned with the detection structure, so that the accuracy of ultrasonic signal transmission is improved.
Drawings
FIG. 1 is a perspective view of a diesel pipeline corrosion prevention detection device of the present invention;
FIG. 2 is a cross-sectional view of a three-dimensional structure of the present invention;
FIG. 3 is a cross-sectional view of the process in the test state of the present invention;
FIG. 4 is a perspective and cross-sectional view of a prismatic reflector of the present invention;
FIG. 5 is a transverse cross-sectional view I of the outer structure of the present invention;
FIG. 6 is a transverse cross-sectional view of the outer structure of the present invention;
FIG. 7 is a transverse cross-sectional view III of the outer structure of the present invention;
FIG. 8 is a longitudinal cross-sectional view of the outer structure of the present invention;
FIG. 9 is a second longitudinal cross-sectional view of the outer structure of the present invention;
FIG. 10 is a perspective and sectional view of the outer structure of the present invention after explosion;
FIG. 11 is a perspective view of the present invention after the radial expansion and contraction members and the connecting members have exploded;
FIG. 12 is a perspective view of the prismatic reflector of the present invention after detonation with respect to the end cap;
FIG. 13 is a cross-sectional view of a circumferential rotating member of the present invention;
FIG. 14 is a perspective view of the axial drive member of the present invention;
FIG. 15 is a perspective and sectional view of the radial expansion element of the present invention;
FIG. 16 is a first perspective view of the coupling and spray assembly of the present invention;
FIG. 17 is a perspective view of the connector of the present invention after explosion with respect to the spray assembly;
FIG. 18 is a second perspective view of the connector and spray assembly of the present invention;
FIG. 19 is a cross-sectional view of a spray assembly of the present invention;
FIG. 20 is a schematic view of the spray assembly of the present invention installed outside an oil pipe;
FIG. 21 is a first cross-sectional view of a side view configuration of the present invention;
FIG. 22 is a second cross-sectional view of the side view configuration of the present invention;
FIG. 23 is an enlarged view of a portion A of FIG. 22 according to the present invention;
FIG. 24 is an enlarged view of portion A of FIG. 22 taken from application two of the present invention;
fig. 25 is an enlarged view of a portion of the structure of fig. 3 in accordance with the present invention.
1: axial drive, 2: prismatic reflector, 3: end cap, 4: circumferential rotation member, 5: radial expansion piece, 6: connecting piece, 7: spray assembly, 8: magnetic positioning member, 9: the detection assembly is used for detecting the position of the optical fiber,
101: first annular body, 102: arc drive wheel, 103: first motor, 104: driving gear, 105: second motor, 106: the fixing ring block is fixed on the base plate,
201: prism, 202: reflecting plate, 203: first magnetic block, 204: first annular projection, 205: drainage hole, 206: the flow stabilizing structure is arranged on the upper portion of the shell,
2061: swirl plate, 2062: annular flow equalizing plate, 2063: the shape of the concave surface is that,
301: second annular projection, 302: flange, 303: guide slope, 304: a sealing ring is arranged on the outer side of the sealing ring,
401: second annular body, 402: kidney-shaped outer hole, 403: kidney-shaped inner bore, 404: the gear ring is provided with a gear ring which is provided with a gear ring,
501: arc-shaped bracket, 502: arc briquetting, 503: connector, 504: telescopic rod, 505: spring, 506: telescopic driving part, 507: push plate, 508: silk aperture, 509: a second magnetic block having a magnetic field distribution in a direction perpendicular to the first magnetic block,
601: cylinder, 602: screw mandrel, 603: t-shaped slider, 604: a square groove is arranged on the upper surface of the shell,
701: connecting rod, 702: a housing, 703: a liquid storage bin, 704: a platen, 705: elastic gasket, 706: a liquid outlet, a liquid outlet and a liquid outlet,
7011: the square surface is provided with a plurality of square surfaces,
901: ultrasonic generator, 902: an ultrasonic receiver.
Detailed Description
The following description of the embodiments of the present invention refers to the accompanying drawings and examples:
it should be noted that the structures, proportions, sizes, and the like shown in the drawings are only for the purpose of understanding and reading the contents disclosed in the specification, and are not intended to limit the practical conditions of the present invention, and any modifications of the structures, changes of the proportion relationships, or adjustments of the sizes, which do not affect the efficacy and the achievable purpose of the present invention, should fall within the scope of the technical contents disclosed in the present invention.
In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
With reference to fig. 1 and 12, the end cap 3 includes a second annular protrusion 301 that is axially connected, one side of the second annular protrusion 301 is fixedly connected to a flange 302, the other side of the second annular protrusion 301 is provided with an inward concave guide slope 303, and a sealing ring 304 is annularly and additionally installed on an outer circumferential surface of the second annular protrusion 301.
With reference to fig. 4 and 12, the prismatic reflection member 2 is axially slidably connected to the inner side of the oil pipe, and includes a prismatic body 201 having a fluid guide hole 205 axially formed on the inner side thereof, a first annular protrusion 204 is fixedly disposed on the outer side of the fluid guide hole 205, a flow stabilizing structure 206 is additionally disposed in the fluid guide hole 205, the flow stabilizing structure 206 includes a plurality of rotational flow plates 2061 and annular flow equalizing plates 2062, the rotational flow plates 2061 are uniformly arranged along the circumferential direction of the fluid guide hole 205 at equal intervals, the annular flow equalizing plates 2062 are radially and equally arranged, each rotational flow plate is radially equally divided into a plurality of parts, one end of the flow stabilizing structure 206 away from the axial driving member 1 is set to be a concave surface 2063, when oil is transported, the prismatic reflection member 2 is fixed at the end cap 3 by liquid impact, and the guiding inclined plane 303 interacts with the first annular protrusion 204, so that the prismatic reflection member 2 is centered, and the oil is rotated and uniformly mixed under the action of the rotational flow plates 2061 and the annular flow equalizing plates 2062.
Referring to fig. 19, one ultrasonic generator 901 of the detecting assembly 9 is provided, at least one ultrasonic receiver 902 is provided, and the magnetic positioning member 8 is fixedly disposed between the ultrasonic generator 901 and the ultrasonic receiver 902.
With reference to fig. 5 and 6, the axial driving member 1 includes a first annular body 101, an end portion of the first annular body 101 is provided with a fixed ring block 106, a plurality of driving portions are equidistantly arranged along a circumferential direction inside the first annular body 101, each driving portion includes an arc-shaped driving wheel 102 and a first motor 103 for controlling the arc-shaped driving wheel 102 to rotate, in this structure, a plurality of driving gears 104 are equidistantly arranged along the circumferential direction at an outer end portion of the fixed ring block 106, a second motor 105 is fixedly arranged at an inner end portion of the fixed ring block, and at least one driving gear 104 is connected to an output end of the second motor 105.
Referring to fig. 13, the circumferential rotating member 4 includes a second annular body 401 in a boss shape, and a gear ring 404 is disposed at a narrow end of the second annular body, referring to fig. 13 and 14, in the present structure, the gear ring 404 is engaged with each driving gear 104, and when the second motor 105 is started, the driving gears 104 rotate, and further, the gear ring 404 is circumferentially rotated by the engagement of the two.
With reference to fig. 4, 9, 19 and 23, each peripheral surface of the prism 201 is additionally provided with a first magnetic block 203, the outer side of the first magnetic block 203 is provided with a reflection plate 202, the arc-shaped pressing block 502 is internally provided with a second magnetic block 509, the magnetism of the second magnetic block 509 is the same as that of the adjacent side of the prismatic reflection member 2, in this structure, the second magnetic block 509 generates thrust to the first magnetic block 203, and the magnetic positioning member 8 generates attraction to the first magnetic block 203.
Referring to fig. 13, a plurality of waist-shaped holes are circumferentially formed in the end surface of the wide-diameter end of the second annular body 401, the waist-shaped holes extend along the radial direction, the waist-shaped holes in the structure include a waist-shaped outer hole 402 and a waist-shaped inner hole 403, and the width of the waist-shaped inner hole 403 is greater than that of the waist-shaped outer hole 402.
Referring to fig. 7, 8 and 15, the radial expansion piece 5 includes three arc-shaped supports 501 connected end to end, one side end of which is provided with an expansion driving portion 506, the other side end of which is provided with a rotatable connector 503, an output end of the expansion driving portion 506 is connected with a push plate 507, and a tail end of the push plate 507 of the previous arc-shaped support 501 is connected with the connector 503 of the next arc-shaped support 501.
With reference to fig. 13, 15 and 17, the middle section of the arc-shaped bracket 501 is provided with an axially-conducted screw hole 508, the inner side of the middle section is connected with an arc-shaped press block 502 through an expansion link 504, a spring 505 is sleeved outside the expansion link 504, the connecting piece 6 is formed by axially and fixedly connecting a cylinder 601 and a screw 602, the side surface of the cylinder 601 is provided with a square groove 604 in parallel with the radial direction, the end part of the cylinder 601 is provided with a T-shaped slide block 603, the wide-diameter end of the T-shaped slide block 603 in the structure is slidably connected with a waist-shaped inner hole 403, and the narrow-diameter end of the T-shaped slide block 603 is slidably connected with the waist-shaped outer hole 402.
With reference to fig. 16 to 19, the spray assembly 7 is sequentially provided with a connecting rod 701, a liquid storage bin 703 and a housing 702 from top to bottom, the housing 702 is internally covered with a detection portion and a liquid outlet 706 with an electromagnetic valve, the liquid outlet 706 is communicated with the liquid storage bin 703, the connecting rod 701 is sleeved on the cylinder 601, and the square face 7011 of the connecting rod is tightly attached to the square groove 604, with reference to fig. 19, the housing 702 is open downward in the structure, two sides of the bottom end of the housing are respectively rotatably provided with a pressing plate 704, and an elastic sealing gasket 705 is additionally arranged between the pressing plate 704 and the housing 702.
In terms of electrical principle, the input end of the controller is electrically connected to the ultrasonic receiver 902, and the output end thereof is electrically connected to the ultrasonic generator 901, the electromagnetic valve, the first motor 103, the second motor 105 and the telescopic driving portion 506.
Embodiment 4, with reference to fig. 21 to 23, this embodiment provides a method for using the diesel pipeline corrosion protection detection apparatus, where the method uses the diesel pipeline corrosion protection detection apparatus to automatically detect the scaling degree of the reflection surface and perform automatic cleaning, and includes the steps of:
s1, when single-point detection is carried out, the telescopic driving part 506 acts to enable the push plate 507 to contract, and then the arc-shaped support 501 is folded inwards;
s2, limiting the moving direction of the arc-shaped pressing block 502 through the waist-shaped inner hole 403 and the connecting piece 6, and offsetting the direction limitation generated by the original shrinkage through the rotatable connecting head 503;
s3, radially extruding the oil pipe by the arc-shaped pressing block 502 before the spraying assembly 7 so as to fix the detection position before detection;
s4, the spraying assembly 7 is radially attached to the oil pipe, a detection space is formed in the spraying assembly, and a coupling agent is introduced through the liquid outlet 706;
s5, and subsequently the detection assembly 9 acts to initiate wall thickness detection.
s1, a radial expansion piece 5 is arranged at an end cover 3 of an oil pipe;
s2, injecting a coupling agent into the liquid storage bin 703, wherein the coupling agent is water in the scheme;
s3, in the oil transportation state, the prismatic reflection piece 2 is tightly attached to the end cover 3 and is centered on the inner side of the oil pipe;
s4, when the oil in the oil pipe stops being transported, the oil tends to be uniform under the action of the prismatic reflection piece 2 and is in a standing state;
s5, controlling the first motor 103 to be started, and enabling the arc-shaped driving wheel 102 to rotate and drive the axial driving piece 1 to axially move along the oil pipe;
s6, with reference to FIG. 25, under the magnetic pushing of the arc-shaped pressing block 502 and the magnetic pulling of the magnetic positioning piece 8, the prismatic reflection piece 2 in the oil pipe moves along with the axial driving piece 1;
s7, the controller electrically controls the ultrasonic generator 901 to send out a signal, after the ultrasonic wave penetrates through the side wall of the oil pipe, the ultrasonic wave passes through the reflecting plate 202 to the ultrasonic receiver 902, and the wall thickness of the oil pipe at the position is judged according to the time interval for receiving the ultrasonic wave;
s8, the detection process is as follows: after the detection assembly 9 collects three circumferential wall thicknesses once, the circumferential rotating piece 4 rotates 60 degrees to complete the wall thickness collection of six circumferential wall thicknesses on the oil pipe at equal intervals, and during the period, the magnetic positioning piece 8 may lose magnetic connection with the first magnetic block 203 for a short time and then vertically corresponds to a new first magnetic block 203 again;
s9, the axial driving piece 1 moves for a specified distance in the axial direction, and the detection process of the S8 is repeated immediately;
s10, classifying the collected wall thickness data according to the upper half side and the lower half side of the oil pipe, namely performing circumferential comparison on the wall thickness data on the lower half side of the oil pipe within the same axial distance; performing axial comparison on the wall thickness data on the upper half side of the oil pipe in the same circumferential height;
s11, when the time interval representing the wall thickness data has large deviation, marking the position, and judging whether serious erosion occurs in the position in the subsequent detection.
s1, a controller electrically controls an ultrasonic generator 901 to send out a signal;
s2, the ultrasonic generator 901 also has the function of receiving ultrasonic waves, a part of the ultrasonic waves are reflected at the boundary of the pipe wall and the coating, and the ultrasonic generator 901 receives the reflected ultrasonic waves;
s3, the other part penetrates through the pipe wall and the coating and is received by the ultrasonic generator 901 under the action of the reflecting plate 202;
s4, the ultrasonic waves in the oil pipe are refracted for many times at the boundary of the pipe wall and the coating, and the ultrasonic wave signals are received by the parallel ultrasonic receivers 902 in sequence;
s5, confirming the wall thickness of the oil pipe according to the time interval of the signals received by the ultrasonic wave generator 901 and the time interval of the signals received by any ultrasonic wave receiver 902;
s6, the reference formula is as follows:
wherein t is 1 The time taken for the ultrasonic wave to reflect off the outer surface of the tubing t 2 The time when the ultrasonic wave is reflected from the inner surface of the oil pipe, and c is the propagation speed of the ultrasonic wave in the measured object.
s1, a radial expansion piece 5 is arranged at an end cover 3 of an oil pipe, and oil in the oil pipe is pumped away from the end part of the oil pipe, so that wall thickness detection is realized in a state that the oil pipe is sealed and no oil or little oil exists in the oil pipe;
s2, injecting a coupling agent into the liquid storage bin 703, wherein the coupling agent is water in the scheme;
s3, in the oil transportation state, the prismatic reflection piece 2 is tightly attached to the end cover 3 and is centered on the inner side of the oil pipe;
s4, when the oil in the oil pipe stops being transported, the oil tends to be uniform under the action of the prismatic reflection piece 2 and is in a standing state;
s5, controlling the first motor 103 to be started, and enabling the arc-shaped driving wheel 102 to rotate and drive the axial driving piece 1 to axially move along the oil pipe;
s6, under the magnetic pushing of the arc-shaped pressing block 502 and the magnetic pulling of the magnetic positioning piece 8, the prismatic reflecting piece 2 in the oil pipe moves along with the axial driving piece 1;
s7, the controller electrically controls the ultrasonic generator 901 to send out a signal, after the ultrasonic wave penetrates through the side wall of the oil pipe, the ultrasonic wave passes through the reflecting plate 202 to the ultrasonic receiver 902, and the wall thickness of the oil pipe at the position is judged according to the time interval of receiving the ultrasonic wave;
s8, the detection process is as follows: after the detection assembly 9 once gathers three ascending wall thicknesses in week, the rotation of circumference rotating member 4 is 60 to accomplish the wall thickness collection of equidistance circumference six places on the oil pipe:
s9, the axial driving piece 1 moves for a specified distance in the axial direction, and the detection process of the S8 is repeated immediately;
s10, the collected wall thickness data are classified according to the upper half side and the lower half side of the oil pipe, namely the wall thickness data on the lower half side of the oil pipe are circumferentially compared within the same axial distance; performing axial comparison on wall thickness data positioned on the upper half side of the oil pipe in the same circumferential height;
and S11, when the time interval representing the wall thickness data has large deviation, marking the position, and judging whether serious erosion occurs in the position in subsequent detection.
Claims (9)
1. A diesel pipeline corrosion prevention detection device comprises an internal structure and an external structure relative to an oil pipe, and is characterized in that,
the inner structure comprises a prismatic reflecting piece (2), the peripheral surface of the prismatic reflecting piece is of a regular prismatic structure, the inner side of the peripheral surface is provided with magnetism,
the external structure comprises an axial driving piece (1), a circumferential rotating piece (4) and detection parts, wherein the axial driving piece (1) is axially connected to the circumferential rotating piece (4), a plurality of detection parts are arranged at the circumferential equal distance of the tail end of the circumferential rotating piece (4), each detection part comprises a magnetic positioning piece (8) and a detection component (9), the magnetism of the adjacent sides of the magnetic positioning piece (8) and the prismatic reflecting piece (2) is opposite,
one ultrasonic generator (901) of the detection assembly (9) is provided, at least one ultrasonic receiver (902) is provided, the magnetic positioning piece (8) is fixedly arranged between the ultrasonic generator (901) and the ultrasonic receiver (902),
the telescopic device is characterized by further comprising a radial telescopic part (5) and a connecting part (6), wherein the radial telescopic part (5) comprises three arc-shaped supports (501) connected end to end, one end part of each radial telescopic part is provided with a telescopic driving part (506), the other end part of each radial telescopic part is provided with a rotatable connector (503), the output end of each telescopic driving part (506) is connected with a push plate (507), the tail end of the push plate (507) of the previous arc-shaped support (501) is connected with the connector (503) of the next arc-shaped support (501),
the middle section of the arc-shaped bracket (501) is provided with an axially communicated screw hole (508), the inner side of the middle section is connected with an arc-shaped pressing block (502) through a telescopic rod (504), a spring (505) is sleeved outside the telescopic rod (504), a second magnetic block (509) is arranged in the arc-shaped pressing block (502) and has the same magnetism as the adjacent side of the prismatic reflecting piece (2),
the ultrasonic generator is characterized by further comprising a controller, wherein the input end of the controller is electrically connected with the ultrasonic receiver (902), and the output end of the controller is electrically connected with the ultrasonic generator (901), the electromagnetic valve, the first motor (103), the second motor (105) and the telescopic driving part (506).
2. The diesel pipeline corrosion prevention detection device is characterized by further comprising an end cover (3) arranged at the end of the oil pipe, wherein the end cover comprises a second annular bulge (301) which is axially communicated, a flange (302) is fixedly connected to one side of the second annular bulge (301), an inwards concave guide inclined surface (303) is arranged on the other side of the second annular bulge (301), and a sealing ring (304) is arranged on the outer circumferential surface of the second annular bulge (301) in the circumferential direction.
3. The corrosion prevention detection device for the diesel oil pipeline according to claim 2, wherein the prismatic reflection member (2) is axially slidably connected to the inner side of the oil pipe, and comprises a prismatic body (201) with an inner side axially provided with a liquid guide hole (205), a steady flow structure (206) is additionally arranged in the liquid guide hole (205), a first annular protrusion (204) is fixedly arranged on the outer side of the liquid guide hole (205),
each peripheral surface of the prism (201) is additionally provided with a first magnetic block (203), and the outer side of the first magnetic block (203) is provided with a reflecting plate (202),
the flow stabilizing structure (206) comprises a plurality of swirl plates (2061) and an annular flow equalizing plate (2062), wherein the swirl plates (2061) are uniformly distributed along the circumferential equal distance of the liquid guide hole (205), the annular flow equalizing plate (2062) is arranged at the radial equal distance, each swirl plate (2061) is divided into a plurality of parts at the radial equal distance, and one end of the flow stabilizing structure (206) far away from the axial driving piece (1) is arranged to be a concave surface shape (2063).
4. The diesel pipeline corrosion protection detection device according to claim 1, wherein the axial driving member (1) comprises a first annular body (101) provided with a fixed ring block (106) at an end thereof,
a plurality of driving parts are arranged on the inner side of the first annular body (101) at equal intervals along the circumferential direction, each driving part comprises an arc-shaped driving wheel (102) and a first motor (103) used for controlling the rotation of the arc-shaped driving wheel (102),
the outer end of the fixed ring block (106) is provided with a plurality of driving gears (104) at equal intervals along the circumferential direction, the inner end of the fixed ring block is fixedly provided with a second motor (105), and at least one driving gear (104) is connected to the output end of the second motor (105).
5. The diesel pipeline corrosion prevention detection device according to claim 4, wherein the circumferential rotating member (4) comprises a boss-shaped second annular body (401), a gear ring (404) is arranged at a narrow diameter end of the second annular body, a plurality of kidney-shaped holes are circumferentially arranged at an end face of a wide diameter end of the second annular body, the kidney-shaped holes extend along a radial direction,
the waist-shaped hole comprises a waist-shaped outer hole (402) and a waist-shaped inner hole (403), the width of the waist-shaped inner hole (403) is larger than that of the waist-shaped outer hole (402), and the gear ring (404) is meshed with the driving gear (104).
6. The diesel pipeline corrosion prevention detection device according to claim 5, wherein the connecting piece (6) is formed by axially and fixedly connecting a cylinder (601) and a screw rod (602), a square groove (604) is formed in the side surface of the cylinder (601) in parallel with the radial direction, a T-shaped sliding block (603) is arranged at the end part of the cylinder (601),
the wide diameter end of the T-shaped sliding block (603) is connected with the waist-shaped inner hole (403) in a sliding mode, and the narrow diameter end of the T-shaped sliding block is connected with the waist-shaped outer hole (402) in a sliding mode.
7. The diesel pipeline corrosion prevention detection device according to claim 6, further comprising a spray assembly (7), wherein the spray assembly (7) is sequentially provided with a connecting rod (701), a liquid storage bin (703) and a shell (702) from top to bottom, an inner cover of the shell (702) is provided with a detection part and a liquid outlet (706) with a solenoid valve, the liquid outlet (706) is communicated with the liquid storage bin (703),
the connecting rod (701) is sleeved on the column body (601), the square surface (7011) of the connecting rod is tightly attached to the square groove (604),
the shell (702) is opened downwards, two sides of the bottom end of the shell are respectively provided with a pressing plate (704) in a rotating mode, and an elastic sealing gasket (705) is additionally arranged between the pressing plate (704) and the shell (702).
8. The use method of the diesel pipeline corrosion prevention detection device is characterized by using the diesel pipeline corrosion prevention detection device as claimed in any one of claims 1 to 7, and comprising the following specific steps of:
s1, a radial telescopic piece (5) is arranged at an end cover (3) of an oil pipe;
s2, injecting a coupling agent into the liquid storage bin (703), wherein the coupling agent is water;
s3, in the oil transportation state, the prismatic reflection piece (2) is tightly attached to the end cover (3) and is centered on the inner side of the oil pipe;
s4, when the oil in the oil pipe stops being transported, the oil tends to be uniform under the action of the prismatic reflection piece (2) and is in a standing state;
s5, controlling the first motor (103) to be started, and enabling the arc-shaped driving wheel (102) to rotate and drive the axial driving piece (1) to axially move along the oil pipe;
s6, under the magnetic pushing of the arc-shaped pressing block (502) and the magnetic pulling of the magnetic positioning piece (8), the prismatic reflection piece (2) in the oil pipe moves along with the axial driving piece (1);
s7, the controller electrically controls the ultrasonic generator (901) to send out a signal, after the ultrasonic wave penetrates through the side wall of the oil pipe, the ultrasonic wave passes through the reflecting plate (202) to the ultrasonic receiver (902), and the wall thickness of the oil pipe at the position is judged according to the time interval for receiving the ultrasonic wave;
s8, the detection process is as follows: after detecting element (9) single collection week three ascending department's wall thickness, circumference rotating member (4) rotate 60 to accomplish the wall thickness collection of equidistance circumference six departments on the oil pipe:
s9, moving the axial driving piece (1) for a specified distance in the axial direction, and immediately repeating the detection process of the S8;
s10, the collected wall thickness data are classified according to the upper half side and the lower half side of the oil pipe, namely the wall thickness data on the lower half side of the oil pipe are circumferentially compared within the same axial distance; performing axial comparison on the wall thickness data on the upper half side of the oil pipe in the same circumferential height;
s11, when the time interval representing the wall thickness data has large deviation, marking the position, and judging whether serious erosion occurs in the position in the subsequent detection.
9. The use method of the diesel pipeline corrosion prevention detection device according to claim 8, characterized by specifically comprising the following steps:
s1, when each detection point is detected, the telescopic driving part (506) acts to enable the push plate (507) to contract, and then the arc-shaped support (501) is folded inwards;
s2, limiting the moving direction of the arc-shaped pressing block (502) through the waist-shaped inner hole (403) and the connecting piece (6), and offsetting the direction limitation generated by the original shrinkage through the rotatable connecting head (503);
s3, radially extruding the oil pipe by the arc-shaped pressing block (502) before the spraying assembly (7) so as to fix the detection position before detection;
s4, the spraying assembly (7) is radially attached to the oil pipe, a detection space is formed in the spraying assembly, and a coupling agent is introduced through a liquid outlet (706);
s5, the detection component (9) acts to start wall thickness detection.
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