CN109765170B - Hand-held type buried pipeline corrodes outer detection device - Google Patents
Hand-held type buried pipeline corrodes outer detection device Download PDFInfo
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- CN109765170B CN109765170B CN201910036829.XA CN201910036829A CN109765170B CN 109765170 B CN109765170 B CN 109765170B CN 201910036829 A CN201910036829 A CN 201910036829A CN 109765170 B CN109765170 B CN 109765170B
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Abstract
The invention relates to a hand-held buried pipeline corrosion external detection device, which comprises: the device comprises a shoulder rest, a handheld rod, an upper computer clamping support and a replaceable sensor. The upper and lower cylindrical sections of the hand-held rod are respectively provided with a shoulder rest and an upper computer clamping support, and the bottom cylindrical section of the hand-held rod is connected with a flexible coupling head of the replaceable sensor through a connecting piece. During operation, the device can be held by detection personnel, and relatively accurate pipeline maintenance general survey operation is carried out conveniently on complicated topography. Compared with the prior art, the portable combined coil with the hollowed-out design, the anti-micro-vibration flexible connector, the sensor capable of being replaced at any time, the level and height calibrator, the handheld detection method and the like are added, so that the problem of difficulty in detection of complex terrains is solved, the precision of general survey detection is improved, and the cost of maintenance and general survey operation of pipelines in the complex terrains is greatly reduced.
Description
Technical Field
The invention belongs to the field of external detection of corrosion of non-excavation buried pipelines, and particularly relates to a handheld external detection device for corrosion of a buried pipeline.
Background
The main working process for detecting the thickness of the pipe wall of the buried pipeline at home and abroad is as follows: excavation, stripping of an anticorrosion (heat preservation) layer, measurement by an ultrasonic thickness gauge, coating and backfilling. Obviously, the method is a destructive detection method, and the representativeness of the detection data and the reliability of the evaluation conclusion are influenced by the number of excavation (sampling) points and the distribution range thereof. Meanwhile, the cost of excavation detection and the damage to the environment are often unacceptable.
Although the in-pipe detection method is more intuitive, the method not only has strict requirements on the construction conditions of the pipeline, the pipe diameter and the flatness of the pipeline, but also needs the device of the transmitting-recovering probe which is arranged in the detected pipeline in advance and carries out the pipe cleaning treatment, and cannot realize the purpose of not influencing the normal operation of the pipeline. Therefore, the in-pipe detection means is difficult to implement for most underground pipelines that are already built and need to be detected.
At present, various known trenchless pipe corrosion detection technologies have various defects and shortcomings, and a metal pipeline pipe wall thickness TEM detection method provides another trenchless pipe wall thickness detection method and approach.
The research of the domestic trenchless detection buried pipeline device is in the exploration stage. The intelligent GBH pipeline corrosion detector is a special pipeline corrosion detection system device designed and manufactured by applying a metal pipeline wall thickness TEM detection method. The method is a set of virtual instrument, detects and evaluates the corrosion condition of the buried pipeline on the ground, does not influence the normal operation of the pipeline, can detect the average pipe wall thickness of the pipeline without excavating or stripping an anticorrosive coating, and can evaluate the buried pipeline on site in real time, but the method has the problems of insufficient detection precision, insufficient automation degree, difficult detection of complex terrains and the like in general investigation and fine investigation operation, so that the method does not enter the actual stage of engineering all the time and still stays in the theoretical stage.
Hand-held type buries outer detection device of ground pipeline corrosion as a novel outer detection device of non-excavation pipeline corrosion, it has following characteristics: 1) the sensor platform is manufactured in a 3D printing mode, and only one side of the inner ring and one side of the outer ring are connected, so that a hollowed-out 'hui' -shaped design is formed approximately, the weight of the device is greatly reduced, and the characteristic of light hand-held type is reflected; 2) the design of a replaceable joint is adopted, and different pipe diameters need to be matched with different sensor combinations, so that the characteristic of convenience in hand holding is embodied; 3) the sensor platform is flexibly connected with a joint connected with the handheld rod, so that the problem of unstable signal extraction caused by tiny inclination of the sensor due to shaking when a person walks is solved; 4) the indication function design, the arranged height gauge and the level meter can assist the measuring tool to carry out more accurate measurement; 5) the general survey is flexible in overall structure design, integrates the characteristics of lightness, convenience, stability and the like, and can realize the general survey operation of various complex terrains.
The problem of pipeline corrosion is deeply valued by people, so that corrosion detection methods and devices are various, and the transient electromagnetic detection method has a wide prospect in the field of trenchless detection, but the detection method has no special detection device, so that the problems troubling people exist in each detection. For example, there are the following problems: 1) the detection equipment is not light and convenient, and due to the complexity of terrain detection, the self weight of the equipment needs to be borne and can move; 2) the sensor replacement steps are complicated, sensors with different parameters are needed to be adopted for pipelines with different pipe diameters, and the complicated replacement steps consume a large amount of time; 3) the detection signals cannot be stably acquired, and the detection equipment is likely to incline or shake due to the diversity of the detection terrain, so that the stable acquisition of the signals is not facilitated; 4) the unknown problem of the detection height and the horizontality is that the detection needs to be carried out under the horizontal condition, and equipment is required to be arranged under different heights according to the buried depth, so that the signal acquisition can be inaccurate due to the fact that the information of the height and the horizontality can not be timely and conveniently acquired.
The buried pipeline corrosion external detection has important significance, however, the transient electromagnetic detection method and device for pipeline corrosion has fewer patents, and the patent number '200810007495.5' discloses a pipeline wall thickness TEM detection method and a GBH pipeline corrosion intelligent detector. However, the disadvantages of this detector are: (1) the instrument and equipment are heavy and inconvenient to place; (2) the requirement for detecting the terrain is high, and the sensor and the detected pipeline need to be kept horizontal all the time; (3) the sensors cannot be replaced conveniently because different pipelines need to be replaced with different sensors, which can cause great deviation of collected signals. Patent No. 201710872279.6 discloses a transient electromagnetic pipeline defect scanning method and apparatus, which uses the same detection method as the above patent, but does not provide a device suitable for on-site detection, and is innovative in theory-oriented working principle. Therefore, on the basis of theoretical detection feasibility, the research on a specific detection device is more urgent for the practical requirements of engineering.
Disclosure of Invention
In order to improve the existing problems of the buried pipeline corrosion external detection device, the invention aims to: the device is made of high-quality nylon plastic materials, and the sensor is designed in a hollow manner, so that the device is light in overall mass, convenient to carry, suitable for various complex terrains and capable of preventing the phenomenon that the detection cannot be performed due to the complex terrains; the replaceable sensor is adopted, so that the sensor matched with the pipeline to be detected with different pipe diameters can be replaced quickly, and a large amount of time is saved; the joint part of the sensor adopts flexible connection, so that the detection error caused by vibration during movement detection is eliminated; the level gauge and the height gauge are installed, so that the precision is improved as much as possible in general investigation, and the large-area corrosion phenomenon caused by error leakage detection is avoided.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
1. a hand-held type buries outer detection device of ground pipeline corruption includes shoulder 1, handheld pole 2, host computer card holds in the palm 3, removable formula sensor 4, characterized by: the shoulder rest fixing ring 5 of the shoulder rest 1 is arranged at the upper part of the handheld rod 2; the lower part of the hand-held rod 2 is provided with an upper computer clamping support 3; the bottom of the hand-held rod 2 is connected with an instrument installation groove 16 through a flexible coupling head 14; the sensor 4 is arranged on one side of the instrument mounting groove 16 through a hexagon head bolt 18;
the shoulder rest 1 consists of a circular shoulder rest fixing ring 5 and a semicircular ring 6, and the shoulder rest fixing ring 5 is connected with the upper cylindrical section of the handheld rod through a hexagon head bolt 18;
the handheld rod 2 is in a shape of a bent cylindrical rod and consists of an upper cylindrical section, a middle cylindrical section, a lower cylindrical section and a bottom cylindrical section, wherein the upper cylindrical section and the lower cylindrical section are respectively provided with a bolt hole 7, the middle cylindrical section is provided with an anti-skidding sleeve 8, and the bottom cylindrical section is provided with a connecting hole 9;
the upper computer clamping support 3 consists of a circular clamping support fixing ring 10 and a rectangular tray 11, and the clamping support fixing ring 10 is connected with the lower cylindrical section of the handheld rod through a hexagon head bolt 18;
the replaceable sensor 4 consists of a flexible coupling head 14, an instrument mounting groove 16 and a combined coil 19;
the flexible coupling head 14 is cylindrical, one end of the flexible coupling head is connected with the cylindrical section at the bottom of the handheld rod 2 through the connecting piece 12, and the other end of the flexible coupling head is integrated with the instrument mounting groove 16;
the connecting piece 12 is a cuboid, two ends of the connecting piece are respectively provided with a wedge-shaped spring block 13, one end of the connecting piece is connected with the cylindrical section at the bottom of the handheld rod 2 through a connecting hole 9, and the other end of the connecting piece is also connected with a flexible coupling head 14 through the connecting hole 9;
the instrument mounting groove 16 is in a cuboid groove shape, one end of the instrument mounting groove is connected with the flexible connecting head 14 to form a whole, and the other end of the instrument mounting groove is connected with the combined coil 19 through a hexagonal head bolt 18; and one side connected with the combined coil 19 is provided with a cuboid through hole 17;
the combined coil 19 is composed of two parts, namely a transmitting coil 20 and a receiving coil 21, the transmitting coil 20 and the receiving coil 21 are both in a hollow square shape and are connected into a whole through four cuboids, and the through hole 17 penetrates through the receiving coil 21 and the transmitting coil 20 to be communicated with the instrument mounting groove 16.
Drawings
FIG. 1 is a three-dimensional schematic view of the present invention
FIG. 2 is a three-dimensional schematic view of a shoulder rest
FIG. 3 is a three-dimensional schematic view of a hand-held wand
FIG. 4 is a three-dimensional schematic view of a card holder of an upper computer
FIG. 5 is a three-dimensional schematic view of a connector
FIG. 6 is a three-dimensional schematic diagram of a replaceable sensor
In the figure, 1, a shoulder rest, 2, a handheld rod, 3, an upper computer clamping support, 4, a replaceable sensor, 5, a shoulder rest fixing ring, 6, a semicircular ring, 7, a bolt hole, 8, an anti-skidding sleeve, 9, a connecting hole, 10, a clamping support fixing ring, 11, a tray, 12, a connecting piece, 13, a spring block, 14, a flexible connecting head, 15, a switch, 16, an instrument mounting groove, 17, a through hole, 18, a hexagon head bolt, 19, a combined coil, 20, a transmitting coil and 21, a receiving coil
Detailed Description
The invention is described in further detail with reference to the accompanying drawings
Referring to fig. 1, the hand-held buried pipeline corrosion external detection device comprises a shoulder rest 1, a hand-held rod 2, an upper computer clamping support 3 and a replaceable sensor 4, and is characterized in that: the fixing ring of the shoulder rest 1 is arranged at the upper part of the handheld rod 2; the lower part of the hand-held rod 2 is provided with an upper computer clamping support 3; the bottom of the hand-held rod 2 is connected with an instrument installation groove 16 through a flexible coupling head 14; the sensor 4 is mounted on the side of the instrument-mounting slot 16 by means of bolts 18.
The working principle of the device is as follows: firstly, a replaceable sensor 4 matched with the diameter to be detected is installed and is connected with an upper computer arranged on a tray 11 and a transmitting and receiving device on the back of an inspector through a through hole 17, when the buried pipeline is detected, the inspector holds an anti-skidding sleeve 8 by the right hand, the transmitting and receiving device is opened by the right shoulder depending on a shoulder rest 1, the current is suddenly cut off when a transmitting coil 20 is in a stable state, according to the electromagnetic induction principle, the current in the transmitting coil 20 generates a magnetic field around the current in the sudden change process, the magnetic field is a primary magnetic field, and primary pulse current is sent to the underground by using an ungrounded return line or a ground line source to generate the primary magnetic field; in the process of transmitting the primary field to the periphery, when the primary field meets a pipeline with good conductivity in an underground zone, induced current, namely eddy current, also called secondary current, is excited in a pipeline body; the secondary current can be attenuated along with time due to ohmic loss of a good conductor, a new magnetic field opposite to the direction of the primary magnetic field is generated around the pipeline in the attenuation process to maintain the stable state of the initial magnetic field, the secondary magnetic field is called as a secondary magnetic field, the attenuation speed of the secondary field is related to the electrical parameters, the volume form, the structure and the like of the detection pipe body, and the secondary magnetic field contains rich information of a detection target body; the receiving coil 21 is utilized on the earth surface to receive the secondary magnetic field which is propagated upwards, the upper computer arranged on the tray 11 is used for collecting the secondary magnetic field data to obtain the corresponding information of the buried pipeline, the complex terrain is generally checked, the corresponding detection information is recorded and stored, and further the corrosion condition of the pipe body of the complex terrain can be roughly and quantitatively analyzed and evaluated.
Referring to fig. 2, the shoulder rest 1 is composed of a circular shoulder rest fixing ring 5 and a semicircular ring 6, wherein the shoulder rest fixing ring 5 is connected with the upper cylindrical section of the handheld rod through a hexagon head bolt 18; the semicircular ring 6 can be used for the shoulder of a detector to depend on during detection, thereby achieving the effects of labor saving and stable measurement.
Referring to fig. 3, the handheld rod 2 is a bent cylindrical rod and consists of an upper cylindrical section, a middle cylindrical section, a lower cylindrical section and a bottom cylindrical section, the upper cylindrical section and the lower cylindrical section are respectively provided with a bolt hole 7 for fixing the shoulder rest 1 and the upper computer clamping support 3, the middle cylindrical section is provided with an anti-skidding sleeve 8, and the bottom cylindrical section is provided with a connecting hole 9 and is connected with a flexible connecting head 14 through a connecting piece 12;
referring to fig. 4, the upper computer clamping support 3 is composed of a circular clamping support fixing ring 10 and a rectangular tray 11, the clamping support fixing ring 10 is connected with a lower cylindrical section of the handheld rod through a hexagon head bolt 18, and the upper computer is arranged on the rectangular tray 11;
referring to fig. 5, the connecting piece 12 is a cuboid, two ends of the connecting piece are respectively provided with a wedge-shaped spring block 13, one end of the connecting piece is connected with the cylindrical section at the bottom of the handheld rod 2 through a connecting hole 9, and the other end of the connecting piece is also connected with a flexible coupling head 14 through the connecting hole 9;
referring to fig. 6, the replaceable sensor 4 is composed of a flexible coupling head 14, an instrument mounting groove 16 and a combined coil 19; the flexible coupling head 14 is cylindrical, so that the detection deviation caused by small vibration during walking detection can be reduced, one end of the flexible coupling head is connected with the cylindrical section at the bottom of the handheld rod 2 through the connecting piece 12, and the other end of the flexible coupling head is integrated with the instrument mounting groove 16; the instrument mounting groove 16 is in a cuboid groove shape, a height instrument and a level instrument can be mounted, one end of the instrument mounting groove is connected with the flexible connecting head 14 to form a whole, the other end of the instrument mounting groove is connected with the combined coil 19 through a hexagonal head bolt 18, and one side connected with the combined coil 19 is provided with a cuboid through-hole 17; the combined coil 19 is composed of two parts, namely a transmitting coil 20 and a receiving coil 21, the transmitting coil 20 and the receiving coil 21 are both in a hollow square shape and are connected into a whole through four cuboids, and the through hole 17 penetrates through the receiving coil 21 and the transmitting coil 20 to be communicated with the instrument mounting groove 16.
Claims (1)
1. A hand-held buried pipeline corrodes outer detection device includes shoulder (1), handheld pole (2), host computer card holds in the palm (3), removable formula sensor (4), characterized by: a shoulder fixing ring (5) of the shoulder rest (1) is arranged at the upper part of the handheld rod (2); the lower part of the hand-held rod (2) is provided with an upper computer clamping support (3); the bottom of the handheld rod (2) is connected with the instrument mounting groove (16) through a flexible coupling head (14); the sensor (4) is arranged on one side of the instrument mounting groove (16) through a hexagon head bolt (18);
the shoulder rest (1) consists of a circular shoulder rest fixing ring (5) and a semicircular ring (6), and the shoulder rest fixing ring (5) is connected with the upper cylindrical section of the handheld rod through a hexagon head bolt (18);
the handheld rod (2) is in the shape of a bent cylindrical rod and consists of an upper cylindrical section, a middle cylindrical section, a lower cylindrical section and a bottom cylindrical section, wherein the upper cylindrical section and the lower cylindrical section are respectively provided with a bolt hole (7), the middle cylindrical section is provided with an anti-skidding sleeve (8), and the bottom cylindrical section is provided with a connecting hole (9);
the upper computer clamping support (3) consists of a clamping support fixing ring (10) and a rectangular tray (11), and the clamping support fixing ring (10) is connected with the lower cylindrical section of the handheld rod through a hexagon head bolt (18);
the replaceable sensor (4) consists of a flexible coupling head (14), an instrument mounting groove (16) and a combined coil (19);
the flexible coupling head (14) is cylindrical, one end of the flexible coupling head is connected with the cylindrical section at the bottom of the handheld rod (2) through a connecting piece (12), and the other end of the flexible coupling head is integrated with the instrument mounting groove (16);
the connecting piece (12) is in a cuboid shape, two ends of the connecting piece are respectively provided with a wedge-shaped spring block (13), one end of the connecting piece is connected with the cylindrical section at the bottom of the handheld rod (2) through a connecting hole (9), and the other end of the connecting piece is connected with the flexible coupling head (14) through the connecting hole (9);
the instrument mounting groove (16) is in a cuboid groove shape, one end of the instrument mounting groove is connected with the flexible coupling head (14) to form a whole, and the other end of the instrument mounting groove is connected with the combined coil (19) through a hexagon head bolt (18); and one side connected with the combined coil (19) is provided with a cuboid through hole (17);
the combined coil (19) is composed of a transmitting coil (20) and a receiving coil (21), the transmitting coil (20) and the receiving coil (21) are both in a hollowed-out square shape, and the through hole (17) penetrates through the receiving coil (21), the transmitting coil (20) and the instrument mounting groove (16) to be communicated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910036829.XA CN109765170B (en) | 2019-01-15 | 2019-01-15 | Hand-held type buried pipeline corrodes outer detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910036829.XA CN109765170B (en) | 2019-01-15 | 2019-01-15 | Hand-held type buried pipeline corrodes outer detection device |
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| CN109765170B true CN109765170B (en) | 2021-08-20 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084692A (en) * | 2017-06-30 | 2017-08-22 | 沈阳工业大学 | Electromagnetic acoustic shear wave thickness measuring transducer |
| CN107402254A (en) * | 2017-09-25 | 2017-11-28 | 天津特米斯科技有限公司 | A kind of transient electromagnetic defect of pipeline checking method and device |
| CN206809291U (en) * | 2017-01-16 | 2017-12-29 | 华北理工大学 | For thyroid ultrasonic detecting probe equipment |
| CN108225228A (en) * | 2018-04-13 | 2018-06-29 | 沈阳工业大学 | Detection electromagnetic ultrasonic thickness measuring transducer architecture in circular pipe |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206809291U (en) * | 2017-01-16 | 2017-12-29 | 华北理工大学 | For thyroid ultrasonic detecting probe equipment |
| CN107084692A (en) * | 2017-06-30 | 2017-08-22 | 沈阳工业大学 | Electromagnetic acoustic shear wave thickness measuring transducer |
| CN107402254A (en) * | 2017-09-25 | 2017-11-28 | 天津特米斯科技有限公司 | A kind of transient electromagnetic defect of pipeline checking method and device |
| CN108225228A (en) * | 2018-04-13 | 2018-06-29 | 沈阳工业大学 | Detection electromagnetic ultrasonic thickness measuring transducer architecture in circular pipe |
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