CN111664784B - Device and method for determining deformation position of pipeline - Google Patents
Device and method for determining deformation position of pipeline Download PDFInfo
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- CN111664784B CN111664784B CN201910177476.5A CN201910177476A CN111664784B CN 111664784 B CN111664784 B CN 111664784B CN 201910177476 A CN201910177476 A CN 201910177476A CN 111664784 B CN111664784 B CN 111664784B
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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
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/24—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in magnetic properties
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Abstract
The application discloses a device and a method for determining a deformation position of a pipeline, and relates to the field of pipeline detection. The apparatus may include: an in-pipe detector (10) and a probe (20). The detector (20) may comprise a rolling wheel (202), a measuring wheel (203), and a magnetic sensor (204), the rolling wheel (202) being fixedly connected to the measuring wheel (203), the magnetic sensor (204) being capable of detecting magnetic induction with the measuring wheel (203). The in-pipe detector (10) can determine the position of the pipe deformation according to the change times of the magnetic induction intensity detected by the magnetic sensor (204) and the diameter of the rolling wheel (202). Adopt the device that this application provided, only need to operate the device once and can confirm pipeline deformation position, consequently the pipeline deformation position's that this application provided confirming device efficiency is higher, the cost is lower and detection accuracy is higher when confirming pipeline deformation position.
Description
Technical Field
The present disclosure relates to the field of pipeline detection, and more particularly, to a device and a method for determining a deformation position of a pipeline.
Background
During the laying process, the pipe wall of the pipeline is deformed due to the action of external force, such as collision or extrusion. According to the construction acceptance standard, before the pipeline is put into production, the deformed part of the pipeline needs to be repaired, or the pipeline with serious deformation needs to be directly replaced.
In the related art, a pig is generally used to detect the deformation position of the pipe. During the testing process, a pig carrying a relatively thin aluminum caliper can typically be run in the pipe, and when there is significant damage to the thin aluminum caliper, it can be determined that the pipe has deformed. Then, a pig carrying a thicker steel caliper plate can be operated in the pipeline, and when the pig is operated to the deformation position of the pipeline, the pig can be clamped in the pipeline, and then the deformation position of the pipeline can be determined through the position of the pig.
However, when the pipeline cleaner is used for detecting the deformation position of the pipeline, the pipeline cleaner needs to be operated twice, and the efficiency of detecting the deformation position of the pipeline is low.
Disclosure of Invention
The application provides a device and a method for determining a pipeline deformation position, which can solve the problem of low detection efficiency of detecting the pipeline deformation position by adopting a pipeline cleaner in the related technology. The technical scheme is as follows:
in one aspect, an apparatus for determining a deformation position of a pipeline is provided, the apparatus comprising: in-pipe detectors and probes; the detector includes: the measuring device comprises a supporting frame, a rolling wheel, a measuring wheel and a magnetic sensor, wherein the outer diameter of the rolling wheel is larger than that of the measuring wheel, the measuring wheel is a gear, and each tooth of the measuring wheel is made of a magnetic material;
the rolling wheel and the measuring wheel are sleeved on a wheel shaft and are rotatably connected with the wheel shaft, and the rolling wheel is fixedly connected with the measuring wheel;
the wheel shaft is fixedly connected with one end of the support frame, and the other end of the support frame is connected with the in-pipeline detector;
the magnetic sensor is arranged on the support frame, the distance between the end face of one end of the magnetic sensor and the wheel surface of the measuring wheel is smaller than a distance threshold value, the orthographic projection of the measuring wheel in the plane of the end face is at least partially overlapped with the end face, and the magnetic sensor is used for detecting the magnetic induction intensity between the measuring wheel and the magnetic sensor;
the magnetic sensor and the in-pipeline detector are in communication connection, the magnetic sensor is further used for sending the detected magnetic induction intensity to the in-pipeline detector, and the in-pipeline detector is used for determining the position of a pipeline deformation position according to the change times of the magnetic induction intensity.
Optionally, the support frame includes: the two support arms are oppositely arranged, and the support plate is arranged on the support plate, and the extending direction of each support arm is vertical to the wheel shaft;
one end of one of the two support arms is fixedly connected with one end of the wheel shaft, one end of the other support arm is fixedly connected with the other end of the wheel shaft, and the other end of each support arm is connected with the in-pipeline detector;
one end of the supporting plate is connected with one supporting arm, the other end of the supporting plate is connected with the other supporting arm, and the magnetic sensor is arranged on the supporting plate.
Optionally, the support frame further includes: a supporting seat;
the supporting seat is fixedly connected with the detector in the pipeline, the other end of each supporting arm is rotatably connected with the supporting seat through a rotating shaft, and the rotating shaft is parallel to the wheel shaft.
Optionally, still be provided with two fixed orificess on the supporting seat, the device still includes: two elastic components corresponding to the two supporting arms one by one, each elastic component comprises: the spring comprises a spring base, a pull rod and a spring;
one end of the pull rod penetrates through one fixing hole to be connected with the other end of the corresponding supporting arm, and the other end of the pull rod is fixedly connected with the spring base;
the spring is sleeved on the pull rod.
Optionally, one end of the spring is arranged in the fixing hole through which the pull rod passes, and the other end of the spring is fixedly connected with the spring base.
Optionally, each of the support arms comprises: the elastic component comprises a support arm main body and a bent part connected with the support arm main body, wherein the bent part is positioned on one side of the support arm main body close to the elastic component;
the support arm main body is provided with a first through hole, and the rotating shaft penetrates through the first through hole and is connected with the support seat;
be provided with the second through-hole on the pull rod, the device still includes: the connecting rod penetrates through the second through hole and is connected with the bending part.
Optionally, the inner diameter of one end of each fixing hole close to the spring base is larger than that of one end far away from the spring base;
one end of the spring is fixedly arranged at one end, close to the spring base, of the fixing hole.
Optionally, the support plate includes: a plurality of sub-support plates arranged at intervals between the two support arms;
one end of each sub-supporting plate is connected with one supporting arm, and the other end of each sub-supporting plate is connected with the other supporting arm;
the magnetic sensor is disposed on one of the sub-supporting plates adjacent to the measuring wheel.
Optionally, the apparatus further comprises: a dust scraping plate;
the dust scraping plate is connected with the supporting frame, the distance between the end face of the dust scraping plate and the wheel face of the measuring wheel is smaller than a distance threshold value, and the end face is parallel to the wheel shaft.
Optionally, the apparatus further comprises: a dust scraping plate pressing plate;
the dust scraping plate pressing plate is connected with the supporting frame and used for supporting the dust scraping plate;
the surface of the dust scraping plate pressing plate is parallel to the surface of the dust scraping plate, and the orthographic projection of the dust scraping plate pressing plate in the plane of the surface of the dust scraping plate is located in the surface of the dust scraping plate.
In another aspect, there is provided a method for determining a pipe deformation position, applied to an in-pipe detector in the apparatus for determining a pipe deformation position according to the above aspect, further comprising a rolling wheel, a measuring wheel and a magnetic sensor; the method comprises the following steps:
determining the number m of changes of the magnetic induction intensity detected by the magnetic sensor after moving from the starting point of the pipeline when moving to the deformation position of the pipeline;
determining the mileage l between the deformation position and the starting point according to the diameter d of the rolling wheel, the number n of tooth grooves on the measuring wheel and the change times m of the magnetic induction intensity, wherein the mileage l satisfies the following conditions:
in a further aspect, there is provided an in-conduit detector for use in the apparatus for determining a deformed position of a conduit according to the above aspect, the apparatus for determining a deformed position of a conduit comprising a rolling wheel, a measuring wheel and a magnetic sensor; the in-pipe detector includes:
the first determination module is used for determining the change times m of the magnetic induction intensity detected by the magnetic sensor after the pipe starts to move from the starting point of the pipe when the determination device of the pipe deformation position moves to the pipe deformation position;
a second determination module, configured to determine, according to the diameter d of the rolling wheel, the number n of tooth grooves on the measuring wheel, and the number m of changes in magnetic induction, a distance l between the deformation point and the starting point, where the distance l satisfies:
in a further aspect, there is provided an in-duct detector for use in the apparatus for determining a deformed position of a duct according to the above aspect; the in-pipe detector includes: a processor, a memory and a computer program stored on the memory and executable on the processing component, the processor, when executing the computer program, implementing the method of determining a pipe deformation position as described in the preceding aspect.
In yet another aspect, a computer-readable storage medium having instructions stored therein, which when run on a computer, cause the computer to perform the method of determining a pipe deformation location according to the above aspect is provided.
The beneficial effect that technical scheme of this application brought includes at least:
the application provides a device for determining the deformation position of a pipeline, which can comprise: in-pipe detectors and probes. The detector can comprise a rolling wheel, a measuring wheel and a magnetic sensor, wherein the rolling wheel and the measuring wheel can be sleeved on a wheel shaft, and the rolling wheel is fixedly connected with the measuring wheel. The teeth of the measuring wheel are made of magnetic materials, the tooth sockets are filled with non-magnetic materials, the magnetic sensor can detect the magnetic induction intensity between the magnetic sensor and the measuring wheel and send the detected magnetic induction intensity to the detector in the pipeline, and the detector in the pipeline can determine the position of a pipeline deformation position according to the change times of the magnetic induction intensity and the diameter of the rolling wheel. The device provided by the application is used, the pipeline deformation position can be determined only by operating the device once, and a pipeline cleaner does not need to be operated twice, so that the determining device for the pipeline deformation position provided by the application has the advantages of higher efficiency, lower cost and higher detection precision when the pipeline deformation position is determined.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an apparatus for determining a deformation position of a pipeline according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a detector provided in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a partial structure of a detector according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another detector according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a spring assembly according to an embodiment of the present invention;
FIG. 6 is a flow chart of a method for determining a pipe deformation position according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an in-duct detector according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another in-duct detector provided in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Pipelines are used as long-distance transport equipment for gas, petroleum and other media, and are laid on land and in the ocean. Safety is the most basic condition for pipeline operation, so that safety measures are taken according to corresponding regulations in various stages of planning, construction, operation and maintenance of pipelines so as to ensure that the pipelines cannot generate leakage problems prematurely during operation. For the pipeline leakage in the pipeline operation process, when workers need to leak the pipeline in the early stage, the pipeline leakage problem is found in time, corresponding measures are taken to maintain the pipeline, and the leakage part is prevented from being enlarged.
During the laying process of the oil and gas pipelines, the pipelines are subjected to external forces, such as collision, extrusion and the like, so that the pipelines are subjected to geometric deformation. Furthermore, the pipe may settle under the influence of gravity during the laying process, and may contact harder materials such as rocks, which may press against the pipe wall, thereby also causing geometric deformations, such as dents or ovals, in the pipe wall. According to the construction acceptance standard, before the pipeline runs, the overproof geometric deformation needs to be repaired or the pipeline at the overproof geometric deformation is replaced. Wherein, the overproof geometric deformation part means that the depth of the geometric deformation part is more than 2% of the outer diameter of the pipeline. The depth direction is perpendicular to the axis of the pipe.
In the related art, a pig is typically used to detect the location of an out-of-tolerance geometric deformation of a pipe. When the pipe cleaner is used for detecting the position of the overproof geometric deformation position of the pipeline, the pipe cleaner needs to be operated twice, and the efficiency of detecting the position of the overproof geometric deformation position is lower and the cost is higher.
The embodiment of the invention provides a device for determining the deformation position of a pipeline, which can be arranged in the pipeline, can be used for determining the position of the deformation position of the pipeline and can solve the problems of low detection efficiency and high detection cost of the deformation position of the pipeline in the related technology, wherein the pipeline can be an underground sealed oil pipeline.
Fig. 1 is a schematic structural diagram of an apparatus for determining a deformation position of a pipeline according to an embodiment of the present invention. Referring to fig. 1, the apparatus may include: an in-duct detector 10 and a probe 20. The detector 20 may include: the measuring device comprises a supporting frame 201, a rolling wheel 202, a measuring wheel 203 and a magnetic sensor 204, wherein the outer diameter of the rolling wheel 202 is larger than that of the measuring wheel 203, and teeth are not arranged on the wheel surface of the rolling wheel 202. The measuring wheel 203 is a gear, each tooth of the measuring wheel 203 is made of a magnetic material, and each tooth socket is filled with a non-magnetic material so as to prevent the tooth of the measuring wheel 203 from interfering with the tooth socket, thereby improving the detection accuracy of the device.
Alternatively, the orthographic projection of the measuring wheel 203 filled with non-magnetic material on the rolling wheel 202 may be circular, that is, each tooth slot is filled with non-magnetic material.
The rolling wheel 202 and the measuring wheel 203 can be sleeved on the wheel shaft 205 and can be rotatably connected with the wheel shaft 205, and the rolling wheel 202 can be fixedly connected with the measuring wheel 203. The axle 205 is fixedly connected to one end of the supporting frame 201, and the other end of the supporting frame 201 is connected (e.g., welded) to the in-pipe detector 10.
The magnetic sensor 204 can be disposed on the supporting frame 201, a distance between an end surface of one end of the magnetic sensor 204 and a wheel surface of the measuring wheel 203 is smaller than a distance threshold, and an orthographic projection of the measuring wheel 203 in a plane of the end surface at least partially overlaps with the end surface, and the magnetic sensor 204 can be used for detecting magnetic induction intensity between the measuring wheel 203 and the end surface.
The magnetic sensor 204 and the in-pipe detector 10 may be connected by a cable, for example, the magnetic sensor 204 may be further configured to transmit the detected magnetic induction to the in-pipe detector 10 via the cable, and the in-pipe detector 10 may be configured to determine a location of a pipe deformation according to a number of changes of the magnetic induction.
In the embodiment of the present invention, the in-pipe detector 10 can move in the pipe under the action of the medium in the pipe, and drives the rolling wheel 202 and the measuring wheel 203 to rotate through the supporting frame 201. Because the teeth and the tooth spaces of the measuring wheel 203 are alternately arranged, and the teeth are made of magnetic materials, a magnetic field can be generated, and the tooth spaces are filled with non-magnetic materials, the magnetic field cannot be generated, and the interference of the magnetic field generated by the teeth can be prevented. Therefore, when the measuring wheel 203 rotates, the magnetic induction intensity detected by the magnetic sensor 204 is stronger when the teeth of the measuring wheel 203 are aligned with the magnetic sensor 204, and the magnetic induction intensity detected by the magnetic sensor 204 is weaker or even not detectable when the teeth of the measuring wheel 203 are aligned with the magnetic sensor 204. Therefore, when the measuring wheel 203 rotates, the magnetic induction intensity detected by the magnetic sensor 204 and the measuring wheel 203 changes alternately, the magnetic sensor 204 can send the magnetic induction intensity to the in-pipeline detector 10, the in-pipeline detector 10 can record the number of times of the magnetic induction intensity change on the one hand, and can detect whether the pipeline where the device is located is deformed on the other hand, and if the pipeline is deformed, the distance of the deformed pipeline can be automatically calculated and recorded according to the number of times of the magnetic induction intensity change and the outer diameter of the rolling wheel 202, so as to determine the position of the deformed pipeline.
In addition, because the outer diameter of the measuring wheel 203 is smaller than the outer diameter of the rolling wheel 202, the measuring wheel 203 does not contact with the inner wall of the pipeline in the running process of the device in the pipeline, so that the measuring wheel 203 can be prevented from being contaminated by impurities such as sludge in the pipeline and influencing the detection accuracy of the magnetic sensor 04.
In summary, an embodiment of the present invention provides an apparatus for determining a deformation position of a pipeline, where the apparatus may include: in-pipe detectors and probes. The detector can comprise a rolling wheel, a measuring wheel and a magnetic sensor, wherein the rolling wheel and the measuring wheel can be sleeved on a wheel shaft, and the rolling wheel is fixedly connected with the measuring wheel. The teeth of the measuring wheel are made of magnetic materials, the tooth sockets are filled with non-magnetic materials, the magnetic sensor can detect the magnetic induction intensity between the magnetic sensor and the measuring wheel and send the detected magnetic induction intensity to the detector in the pipeline, and the detector in the pipeline can determine the position of a pipeline deformation position according to the change times of the magnetic induction intensity and the diameter of the rolling wheel. By using the device provided by the embodiment of the invention, the pipeline deformation position can be determined by only operating the device once, and a pipeline cleaner does not need to be operated twice, so that the device for determining the pipeline deformation position provided by the embodiment of the invention has the advantages of higher efficiency, lower cost and higher detection precision when the pipeline deformation position is determined.
Optionally, the rolling wheel 202 may be made of a metal material, such as alloy steel, and the roughness of the wheel surface of the rolling wheel 202 may be greater than a roughness threshold to ensure that there is friction between the rolling wheel 202 and the inner wall of the pipe, thereby ensuring that the device does not slip when moving in the pipe. The alloy steel can be 40cr alloy steel, and the 40cr alloy steel has good comprehensive mechanical properties. The nonmagnetic material filled in the tooth grooves of the measuring wheel 203 may be a resin material.
In an embodiment of the present invention, the magnetic sensor 204 may convert the detected magnetic induction into a pulse signal, and send the pulse signal to the in-pipe detector 10 through a cable. The distance between the end surface of the magnetic sensor 204 and the tread surface of the measuring wheel 203 may be less than a distance threshold, and optionally, the distance threshold may be 8 millimeters (mm). That is, the distance between the end surface of one end of the magnetic sensor 204 and the wheel surface of the measuring wheel 203 close to the magnetic sensor 204 is less than 8mm, so as to ensure that the magnetic sensor 204 can detect the magnetic induction intensity with the measuring wheel 203 and simultaneously can not wear with the measuring wheel 203.
Alternatively, the magnetic sensor 204 may be cylindrical, the axis of the magnetic sensor 204 may be perpendicular to the axis of the measuring wheel 203, and the end face of one end of the magnetic sensor 204 may face the wheel face of the measuring wheel 203.
Fig. 2 is a schematic structural diagram of a detector according to an embodiment of the present invention. Referring to fig. 2, the supporting bracket 201 may include: two oppositely disposed support arms 2011, and a support plate 2012, each support arm 2011 may extend perpendicular to the axle 205. That is, the two support arms 2011 may be disposed relatively parallel.
In the two support arms 2011, one end of one support arm 2011 may be fixedly connected to one end of the axle 205, one end of the other support arm 2011 may be fixedly connected to the other end of the axle 205, and the other end of each support arm 2011 may be connected to the in-pipe detector 10.
For example, one end of each support arm 2011 may be provided with an axle hole, and the axle holes provided on the two support arms 2011 may be coaxial, and the axle 205 may pass through the two axle holes, so as to be fixedly connected with the two support arms 2011.
One end of the support plate 2012 may be connected to one support arm 2011 and the other end may be connected to the other support arm 2011, and the magnetic sensor 204 may be disposed on the support plate 2012.
Alternatively, a coupling through hole may be formed in the supporting plate 2012, and a screw thread may be formed on an outer wall of the magnetic sensor 204, and the magnetic sensor 204 may be coupled to the supporting plate 2012 through the coupling through hole.
As an alternative implementation, the diameter of the connecting through hole may be larger than the outer diameter of the magnetic sensor 204. The device may also include two fastening nuts 206 (only one fastening nut 206 is shown in fig. 2). The magnetic sensor 204 can pass through the connecting through hole, a fastening nut 206 can be screwed with one end of the magnetic sensor 204, and the end face of the fastening nut 206 far away from one end of the measuring wheel 203 can be in contact with the plate face of the supporting plate 2012 near the measuring wheel 203. Another fastening nut 206 may be connected to the other end of the magnetic sensor 204, and an end surface of the another fastening nut 206 near one end of the measuring wheel 203 may contact a plate surface of the supporting plate 2012 far away from the measuring wheel 203, so that the fastening connection between the magnetic sensor 204 and the supporting plate 2012 can be realized through the two fastening nuts 206.
As another alternative implementation manner, the diameter of the connecting through hole may be equal to the outer diameter of the magnetic sensor 204, and the connecting through hole may be a threaded hole, and the magnetic sensor 204 may be screwed into the connecting through hole, so as to achieve the fastening connection between the magnetic sensor 204 and the supporting plate 2012.
In an embodiment of the present invention, each of the support arms 2011 may be a plate-shaped structure, the support plate 2012 is located between the two support arms 2011, and a plate surface of the support plate 2012 may be perpendicular to the plate surfaces of the two support arms 2011.
In an alternative implementation, both ends of the support plate 2012 can be welded to the surface of one support arm 2011 near the other support arm 2011, or the support plate 2012 can be integrated with each support arm 2011.
In another optional implementation manner, both ends of the supporting plate 2012 may be provided with a plurality of threaded holes, and each supporting arm 2011 may also be provided with a plurality of threaded holes corresponding to the plurality of threaded holes one to one. One threaded hole at one end of the support plate 2012 can be aligned with a corresponding threaded hole on a corresponding support arm 2011, and a bolt can be disposed in the aligned threaded hole, so that the connection between the support plate 2012 and the two support arms 2011 can be realized. Illustratively, the bolt may be a socket head cap bolt.
Optionally, for the implementation in which the support plate 2012 is connected to each of the support arms 2011 by bolts, the apparatus may further include a plurality of flat washers corresponding to the plurality of threaded holes one to one. Each bolt may be disposed through a flat washer in an aligned one of the threaded bores. Owing to be provided with the plain washer, can increase the area of contact between this bolt and this support arm 2011 to can reduce the mutual wearing and tearing between the face of bolt and this support arm 2011, effectively increase the life of this device. By way of example, the flat washer may be made of a metallic material.
In an embodiment of the present invention, the supporting plate 2012 may include: a plurality of sub-support plates 20121 provided at intervals between the two support arms 2011. Each sub-support plate 20121 may be connected at one end to one support arm 2011 and at the other end to the other support arm 2011. The magnetic sensor 204 may be disposed on one of the plurality of sub-supporting plates 20121 adjacent to the measuring wheel 203.
By providing the plurality of sub-support plates 20121 between the two support arms 2011, the strength of the whole support frame 201 can be increased, and the distance between the two support arms 2011 can be limited, so that the two support arms 2011 are always kept parallel.
For example, the sub-support plates 20121 may be arranged in parallel, that is, the plate surface of each sub-support plate 20121 may be perpendicular to the support arm 2011. For example, fig. 2 shows two sub-support plates 20121. The implementation manner of each sub-support plate 20121 can refer to the implementation manner of the support plate 2012, and the embodiment of the present invention is not described herein again.
Referring to fig. 2, the supporting frame 201 may further include: a supporting seat 2013. The supporting seat 2013 is fixedly connected with the in-pipe detector 10. The other end of each support arm 2011 may be rotatably connected to the support base 2013 via a shaft 207, and the shaft 207 may be parallel to the axle 205.
In the embodiment of the present invention, the supporting seat 2013 may be provided with a plurality of threaded holes, and the in-pipe detector 10 may also be provided with a plurality of through holes corresponding to the plurality of threaded holes one to one. Each threaded hole on the supporting seat 2013 can be aligned with a corresponding through hole on the in-pipe detector 10, and a bolt can be arranged in the aligned through hole, so that the in-pipe detector 10 is connected with the supporting seat 2013. Alternatively, the through hole may be a threaded hole.
Fig. 3 is a schematic partial structural diagram of a detector according to an embodiment of the present invention. Fig. 4 is a schematic structural diagram of another detector provided in the embodiment of the present invention. Referring to fig. 3, the supporting base 2013 may further include two fixing holes 20131. Referring to fig. 4, the apparatus may further include: two elastic members 208 corresponding to the two support arms 2011 one to one. Fig. 5 is a schematic structural diagram of an elastic component according to an embodiment of the present invention. Referring to fig. 5, each elastic assembly 208 may include: spring mount 2081, pull rod 2082, and spring 2083. For example, the axes of the two fixing holes 20131 may be parallel, and the plane of the axes of the two fixing holes 20131 may be parallel to the axis of the axle 205.
One end of the pull rod 2082 may pass through a fixing hole 20131 to be connected (e.g., welded) with the other end of a corresponding support arm 2011, the other end of the pull rod 2082 may be fixedly connected (e.g., welded) with the spring base 2081, and the spring 2083 may be sleeved on the pull rod 2082, that is, the spring 2083 may be disposed between the spring base 2081 and the support seat 2013.
If the rolling wheel 202 contacts with the protrusion of the inner wall of the pipe during the movement of the device in the pipe, the protrusion will exert a force on the rolling wheel 202, for example, referring to fig. 4, a force in the X direction can be exerted. The rolling wheel 202 can drive the two support arms 2011 movably connected with the rolling wheel to rotate around the rotating shaft 207 in the direction close to the pipeline axis. At this time, each support arm 2011 can pull the pull rod 2082 connected to the support arm 2011, and the pull rod 2082 can drive the spring base 2081 to move towards the direction close to the support seat 2013, so as to compress the spring 2083. When the roller wheel 202 passes over the protrusion, the force applied by the protrusion to the roller wheel 202 is removed. At this time, under the action of the restoring force of the spring 2083, each pull rod 2082 can pull the corresponding one of the support arms 2011 to rotate around the rotating shaft 207 in the direction away from the pipeline axis, so that the rolling wheel 202 is always in contact with the inner wall of the pipeline. Therefore, when the device moves in the pipeline, the wheel surface of the rolling wheel 202 is always attached to the inner wall of the pipeline, and the detection accuracy of the device can be ensured.
In an alternative implementation manner, one end of the spring 2083 may be disposed in the fixing hole 20131 through which the pull rod 2082 passes, and the other end of the spring 2083 is fixedly connected (e.g., welded) with the spring base 2081, so as to prevent the spring 2083 from being separated from the spring base 2081, thereby ensuring the structural stability of the device.
For the implementation of each spring 2083, it should be noted that the inner diameter of each fixing hole 20131 at the end close to the spring seat 2081 may be larger than the inner diameter of the end far from the spring seat 2081, and one end of the spring 2083 may be fixedly disposed at the end of the fixing hole 20131 close to the spring seat 2081. That is, the fixing holes 20131 may be holes with different inner diameters. Thereby, it is ensured that the spring 2083 does not come off the fixing hole 20131.
In another alternative implementation, one end of the spring 2083 may be connected (e.g., welded) to the end of the fixing hole 20131 near the spring seat 2081, and an end surface of one end of the spring 2083 may contact an end surface of the fixing hole 20131 near the spring seat 2081. At this time, each of the fixing holes 20131 may be a hole having an equal inner diameter.
In the embodiment of the present invention, each spring base 2081 is provided with a connecting hole, the outer wall of the other end of each pull rod 2082 may be provided with a thread, and the other end of the pull rod 2082 may pass through the connecting hole to be connected with a nut, so as to realize the connection between the pull rod 2082 and the spring base 2081. Or the connection hole provided on each spring seat 2081 may be a threaded hole, and the pull rod 2082 is in threaded connection with the threaded hole, so as to realize the connection between the pull rod 2082 and the spring seat 2081. Still alternatively, the pull rod 2082 and the spring seat 2081 may be welded or may be an integral structure. The embodiment of the present invention does not limit the connection manner between the spring seat 2081 and the pull rod 2082.
As shown in fig. 4, each support arm 2011 may include: a support arm main body 20111 and a bent portion 20112 connected to the support arm main body 20111, wherein the bent portion 20112 is located at a side of the support arm main body 20111 close to the elastic component 208. For example, referring to fig. 4, each support arm 2011 may be L-shaped.
The support arm main body 20111 is provided with a first through hole (not shown in fig. 4), and the rotation shaft 207 can pass through the first through hole to be connected with the support seat 2013.
In an embodiment of the present invention, the supporting base 2013 may be provided with a first connecting hole, and the first connecting hole and the first through hole may be coaxial. The rotation shaft 207 can pass through the two first through holes and the first connection hole, and is connected to the support base 2013 and each support arm 2011, so as to realize the rotational connection between the support base 2013 and each support arm 2011.
In an alternative implementation manner, the rotating shaft 207 may be movably connected to the supporting seat 2013 through the first connecting hole, and fixedly connected to each supporting arm 2011 through each first through hole, so as to achieve the rotational connection between the supporting seat 2013 and each supporting arm 2011.
For example, the inner diameter of the first connection hole may be larger than the outer diameter of the rotation shaft 207, and the inner diameter of the first through hole may be equal to or slightly smaller than the outer diameter of the rotation shaft 207. The apparatus may further include: two rotating shaft bushings. The end face of one end of each rotating shaft bushing is circular, and the end face of the other end of each rotating shaft bushing is circular. And the inner diameter of each rotating shaft bushing is equal to the outer diameter of the rotating shaft 207, and the outer diameter of one end of each rotating shaft bushing is equal to the inner diameter of the first connecting hole. One end of each rotating shaft bushing can be arranged in the first connecting hole, and the other end of each rotating shaft bushing is positioned outside the first connecting hole. When each support arm 2011 is connected with the support base 2013, two end faces of the other end of each spindle bushing can be respectively contacted with the support base 2013 and one support arm 2011. Moreover, due to the arrangement of the rotating shaft bushing, mutual abrasion between the rotating shaft 207 and the supporting seat 2013 can be avoided, and the service life of the device is effectively prolonged.
In another alternative implementation manner, the rotating shaft 207 may be fixedly connected to the supporting seat 2013 through the first connecting hole, and movably connected to each supporting arm 2011 through the first through hole, so as to achieve the rotational connection between the supporting seat 2013 and each supporting arm 2011. For example, the inner diameter of the first connection hole is equal to or slightly smaller than the outer diameter of the rotation shaft 207, and the inner diameter of the first through hole may be larger than the outer diameter of the rotation shaft 207.
Referring to fig. 4, the pull rod 2082 may be provided with a second through hole (not shown in fig. 4), and the apparatus may further include: a connecting rod 209, wherein the connecting rod 209 can pass through the second through hole to be connected with the bent portion 20112.
In an embodiment of the present invention, a second connection hole (not shown in fig. 4) may be provided on the bent portion 20112 of each support arm 2011. The connecting rod 209 can pass through the second through hole and the second connecting hole, so that each supporting arm 2011 is movably connected with a corresponding pull rod 2082. At this time, the connecting rod 209 may be movably connected to each supporting arm 2011, and the connecting rod 209 may be movably connected or fixedly connected to each pulling rod 2082.
Alternatively, the second through hole may be a threaded hole, the device may include two connection bolts, and the inner diameter of the second connection hole may be larger than the outer diameter of the connection bolt. The second through hole of each tie bar 2082 may be aligned with a second connecting hole of a corresponding one of the bent portions 20112, and a connecting bolt may be disposed in the aligned hole and connected to the second through hole, thereby achieving a movable connection between each support arm 2011 and a corresponding one of the tie bars 2082.
In the embodiment of the present invention, an end surface of the supporting seat 2013 near one end of the measuring wheel 203 may be an arc surface, and the arc surface protrudes in a direction near the measuring wheel 203. The joint between the bent portion 20112 of each support arm 2011 and the support arm main body 20111 may be a fillet, and the angle of the fillet may be greater than 90 ° and less than or equal to 150 °.
Referring to fig. 3, the apparatus may further include: a dust scraper 210. The dust scraping plate 210 can be connected to the supporting frame 201, the distance between the end surface of the dust scraping plate 210 and the wheel surface of the measuring wheel 203 is smaller than the distance threshold, and the end surface is parallel to the wheel shaft 205. By way of example, the spacing threshold may be 6 mm.
For example, as shown in fig. 3, the dust scraper 210 may be connected to a supporting arm 2011 near the measuring wheel 203, and the surface of the dust scraper 210 may be parallel to the extending direction of the supporting arm 2011.
In the embodiment of the present invention, during the rotation of the measuring wheel 203, the dust scraping plate 210 can scrape off impurities such as sludge on the measuring wheel 203, thereby ensuring the detection accuracy of the magnetic sensor 204 of the apparatus.
Optionally, a plurality of threaded holes may be formed in the dust scraping plate 210, and a plurality of threaded holes corresponding to the plurality of threaded holes may be formed in the end surface of the support arm 2011 close to the measuring wheel 203 and close to one end of the elastic component 208. A threaded hole in the dust scraper 210 may be aligned with a threaded hole in the support arm 2011, and a bolt may be disposed in the aligned threaded hole to couple the dust scraper 210 to the support arm 2011.
As shown in fig. 3, the apparatus may further include: the scraper press 211. The dust scraper pressing plate 211 is connected to the supporting frame 201, and can be used for supporting the dust scraper 210. The surface of the dust scraper pressing plate 211 is parallel to the surface of the dust scraper 210, and the orthographic projection of the dust scraper pressing plate 211 in the plane of the surface of the dust scraper 210 at least partially overlaps the surface of the dust scraper 210. For example, an orthographic projection of the surface of the dust scraper pressing plate 211 in the plane of the surface of the dust scraper 210 is located in the surface of the dust scraper 210.
Alternatively, the wiper blade press 211 may be bolted to a support arm 2011 proximate to the measuring wheel 203.
In an embodiment of the present invention, the detector may further include: the bearing comprises two bearings, two spacing sleeves corresponding to the two bearings one by one, two bearing glands corresponding to the two spacing sleeves one by one and a bearing spacing sleeve. Each bearing, each spacer, and bearing spacer may be sleeved over the axle 205. The bearing spacer is located between two bearings, each spacer is located on one side of one bearing away from the bearing spacer, one side of each spacer is in contact with the inner ring of the bearing, and the other side of each spacer is in contact with one support arm main body 20111. That is, the two spacers may fix the two bearings to the axle 205 to prevent the two bearings from moving in the axial direction of the axle 205.
Each bearing gland can be sleeved on a corresponding one of the spacing sleeves, and one end of each bearing gland is in contact with the outer ring of a corresponding one of the bearings so as to prevent the bearing from moving radially. The measuring wheel 203 can be sleeved on a bearing and connected with a corresponding bearing gland through a bolt. The rolling wheel 202 can be sleeved on another bearing and connected with a corresponding bearing gland through a bolt. And, the rolling wheel 202 and the measuring wheel 203 can be fixedly connected by bolts to ensure that the measuring wheel 203 and the rolling wheel 202 can rotate simultaneously.
In the embodiment of the present invention, the in-pipe detector 10 may be connected to a plurality of detectors 20, which may improve the detection reliability of the apparatus, and avoid that the apparatus cannot determine the position of the pipe deformation position due to a failure problem during the movement of one detector 20 in the pipe; on the other hand, the detection accuracy of the device can be further improved by screening the data detected by different detectors 20 to obtain more accurate data.
In summary, an embodiment of the present invention provides an apparatus for determining a deformation position of a pipeline, where the apparatus may include: in-pipe detectors and probes. The detector can comprise a rolling wheel, a measuring wheel and a magnetic sensor, wherein the rolling wheel and the measuring wheel can be sleeved on a wheel shaft, and the rolling wheel is fixedly connected with the measuring wheel. The teeth of the measuring wheel are made of magnetic materials, the tooth sockets are filled with non-magnetic materials, the magnetic sensor can detect the magnetic induction intensity between the magnetic sensor and the measuring wheel and send the detected magnetic induction intensity to the detector in the pipeline, and the detector in the pipeline can determine the position of a pipeline deformation position according to the change times of the magnetic induction intensity and the diameter of the rolling wheel. By using the device provided by the embodiment of the invention, the pipeline deformation position can be determined by only operating the device once without operating a pipe cleaner twice, so that the device for determining the pipeline deformation position provided by the embodiment of the invention has the advantages of higher efficiency, lower cost and higher detection precision when determining the pipeline deformation position, and can avoid the waste of manpower and material resources caused by wrong excavation in the pipeline replacing process.
The embodiment of the invention provides a method for determining a pipeline deformation position, which can be applied to the in-pipeline detector 10 in the device for determining a pipeline deformation position provided by the embodiment, and the device for determining a pipeline deformation position further comprises a rolling wheel 202, a measuring wheel 203 and a magnetic sensor 204. Referring to fig. 6, the method may include:
The number m of changes of the magnetic induction intensity refers to the number of times that the range in which the magnetic induction intensity detected by the magnetic sensor 204 is changed from the first intensity range to the second intensity range. The first intensity range may be greater than the second intensity range, that is, the number of times of the magnetic induction change may be the number of times of the magnetic induction changing from strong to weak in the process of alternating between strong and weak.
In the embodiment of the present invention, the in-pipe detector 10 can move in the pipe under the action of the medium in the pipe, and drives the rolling wheel 202 and the measuring wheel 203 to rotate through the supporting frame 201. The magnetic sensor 204 can detect the magnetic induction between the measuring wheel 203 and the magnetic sensor in real time, and convert the detected magnetic induction into an electrical signal to be sent to the in-pipe detector 10.
Since the teeth of the measuring wheel 203 are made of magnetic material and the tooth grooves are filled with non-magnetic material, the magnetic induction intensity detected by the magnetic sensor 204 changes alternately when the measuring wheel 203 rotates. Therefore, the in-pipe detector 10 can determine the number of changes in the magnetic induction detected by the magnetic sensor 204, and then determine the number of rotations of the measuring wheel 203 based on the number of changes and the number of tooth slots of the measuring wheel 203. And when the measuring wheel 203 rotates once, the number m of the magnetic induction changes is the number of the tooth slots of the measuring wheel 203.
For example, if the number of tooth grooves of the measuring wheel 203 is 30, the number m of changes in the magnetic induction intensity may be 30 when the measuring wheel 203 rotates one turn.
In the embodiment of the present invention, the in-pipe detector 10 may determine the number of times of the change of the magnetic induction according to the change rule of the magnetic induction sent by the magnetic sensor 204. For example, the in-pipe detector 10 may determine, from the change rule of the acquired magnetic induction, the number of valleys (i.e., the lowest value) of the magnetic induction in the change rule when the pipe is deformed after the pipe starts to move from the starting point, and determine the number of the valleys as the number m of changes in the magnetic induction.
wherein, the number n of the tooth sockets is the number of the teeth of the gear.
In the embodiment of the present invention, the rolling wheel 202 is fixedly connected to the measuring wheel 203, and when the rolling wheel 202 rotates, the measuring wheel 203 is driven to rotate, so that the number of turns of the measuring wheel 203 is equal to the number of turns of the rolling wheel 202. The in-pipe detector 10 can determine the number of turns of the measuring wheel 203 after the device starts moving from the starting point of the pipe according to the number m of changes of the magnetic induction and the number of tooth slots of the measuring wheel 203, and the number of turns is m/n, and the in-pipe detector 10 can determine the number of turns of the rolling wheel 202 to be m/n. Since the surface of the rolling wheel 202 is always in contact with the inner wall of the pipe, the in-pipe detector 10 can determine the distance l between the deformation point and the starting point according to the number m/n of the rotation turns of the rolling wheel 202 and the diameter d of the rolling wheel.
For example, assuming the diameter of the scroll wheel 202 is 80 centimeters (cm), the circumference of the scroll wheel 202 is 80 π cm. Assuming that the apparatus for determining the pipe deformation position moves from the pipe starting point to the pipe deformation point, the number m of changes in the magnetic induction intensity determined by the in-pipe detector 10 is 150, the number n of tooth slots of the measuring wheel 203 is 30, and the number of turns of the rolling wheel 202 is 5, the in-pipe detector 10 can determine that the mileage l between the pipe deformation point and the starting point can be 400 pi cm.
Fig. 7 is a schematic structural diagram of an in-pipe detector according to an embodiment of the present invention, which may be applied to the device for determining a deformed position of a pipe according to the above-described embodiment. Referring to fig. 7, the apparatus may include:
a first determining module 401, configured to determine the number m of changes in the detected magnetic induction of the magnetic sensor after the pipe is moved from the starting point when the pipe deformation position determining device is moved to the pipe deformation position.
A second determining module 402, configured to determine a distance l between the deformation point and the starting point according to the diameter d of the rolling wheel, the number n of tooth gaps on the measuring wheel, and the number m of changes in the magnetic induction, where the distance l satisfies:
fig. 8 is a schematic structural diagram of another in-duct detector according to an embodiment of the present invention, which can be applied to the device for determining a deformed position of a duct according to the above-mentioned embodiment. Referring to fig. 8, the in-pipe detector may include: a processor 501, a memory 502 and a computer program 5021 stored on the memory 502 and operable on the processor 501, when executing the computer program 5021, implements the method for determining a deformed position of a pipe as provided in the above method embodiments.
The embodiment of the present invention further provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is run on a computer, the computer is caused to execute the method for determining a pipe deformation position provided in the foregoing method embodiment.
The above description is only exemplary of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (12)
1. An apparatus for determining a location of a pipe deformation, the apparatus comprising: an in-pipe detector (10) and a probe (20); the detector (20) comprises: the device comprises a supporting frame (201), a rolling wheel (202), a measuring wheel (203) and a magnetic sensor (204), wherein the outer diameter of the rolling wheel (202) is larger than that of the measuring wheel (203);
the measuring wheel (203) is a gear, each tooth of the measuring wheel (203) is made of a magnetic material, and each tooth groove is filled with a non-magnetic material;
the rolling wheel (202) and the measuring wheel (203) are sleeved on a wheel shaft (205) and are rotatably connected with the wheel shaft (205), and the rolling wheel (202) is fixedly connected with the measuring wheel (203);
the wheel shaft (205) is fixedly connected with one end of the support frame (201), and the other end of the support frame (201) is connected with the in-pipeline detector (10);
the magnetic sensor (204) is arranged on the supporting frame (201), the distance between the end face of one end of the magnetic sensor (204) and the wheel face of the measuring wheel (203) is smaller than a distance threshold value, the orthographic projection of the measuring wheel (203) in the plane of the end face at least partially overlaps with the end face, and the magnetic sensor (204) is used for detecting the magnetic induction intensity between the measuring wheel (203) and the measuring wheel;
the pipeline internal detector is characterized in that a communication connection is established between the magnetic sensor (204) and the pipeline internal detector (10), the magnetic sensor (204) is further used for sending the detected magnetic induction intensity to the pipeline internal detector (10), and the pipeline internal detector (10) is used for determining the position of a pipeline deformation position according to the change times of the magnetic induction intensity.
2. The device according to claim 1, wherein the support frame (201) comprises: two oppositely arranged supporting arms (2011) and a supporting plate (2012), wherein the extending direction of each supporting arm (2011) is vertical to the wheel shaft (205);
one end of one support arm (2011) is fixedly connected with one end of the wheel shaft (205), one end of the other support arm (2011) is fixedly connected with the other end of the wheel shaft (205), and the other end of each support arm (2011) is connected with the in-pipeline detector (10);
one end of the supporting plate (2012) is connected with one of the supporting arms (2011), the other end of the supporting plate is connected with the other supporting arm (2011), and the magnetic sensor (204) is arranged on the supporting plate (2012).
3. The device of claim 2, wherein the support frame (201) further comprises: a support base (2013);
the supporting seat (2013) is fixedly connected with the in-pipeline detector (10), the other end of each supporting arm (2011) is rotatably connected with the supporting seat (2013) through a rotating shaft (207), and the rotating shaft (207) is parallel to the wheel shaft (205).
4. The device according to claim 3, characterized in that said support (2013) is further provided with two fixing holes (20131), said device further comprising: two elastic assemblies (208) in one-to-one correspondence with the two support arms (2011), each elastic assembly (208) comprising: a spring base (2081), a pull rod (2082) and a spring (2083);
one end of the pull rod (2082) passes through one fixing hole (20131) to be connected with the other end of the corresponding supporting arm (2011), and the other end of the pull rod (2082) is fixedly connected with the spring base (2081);
the spring (2083) is sleeved on the pull rod (2082).
5. The device according to claim 4, wherein one end of the spring (2083) is disposed in the fixing hole (20131) through which the pull rod (2082) passes, and the other end of the spring (2083) is fixedly connected with the spring base (2081).
6. The device according to claim 4, characterized in that each support arm (2011) comprises: the supporting arm comprises a supporting arm main body (20111) and a bent part (20112) connected with the supporting arm main body (20111), wherein the bent part (20112) is positioned on one side of the supporting arm main body (20111) close to the elastic component (208);
a first through hole is formed in the support arm main body (20111), and the rotating shaft (207) penetrates through the first through hole to be connected with the support seat (2013);
be provided with the second through-hole on pull rod (2082), the device still includes: the connecting rod (209) penetrates through the second through hole and is connected with the bent part (20112).
7. The device according to any one of claims 4 to 6, characterized in that the end of each fixing hole (20131) close to the spring seat (2081) has a larger inner diameter than the end remote from the spring seat (2081);
one end of the spring (2083) is fixedly arranged at one end of the fixing hole (20131) close to the spring base (2081).
8. The device according to any of claims 2 to 6, characterized in that said support plate (2012) comprises: a plurality of sub-support plates (20121) spaced between the two support arms (2011);
one end of each sub-supporting plate (20121) is connected with one supporting arm (2011), and the other end of each sub-supporting plate is connected with the other supporting arm (2011);
the magnetic sensor (204) is disposed on one of the sub-support plates (20121) that is close to the measuring wheel (203) among the plurality of sub-support plates (20121).
9. The apparatus of any of claims 1 to 6, further comprising: a dust scraper (210);
the dust scraping plate (210) is connected with the supporting frame (201), the distance between the end face of the dust scraping plate (210) and the wheel face of the measuring wheel (203) is smaller than a distance threshold value, and the end face is parallel to the wheel shaft (205).
10. The apparatus of claim 9, further comprising: a dust scraper press plate (211);
the dust scraping plate pressing plate (211) is connected with the supporting frame (201) and used for supporting the dust scraping plate (210);
the plate surface of the dust scraping plate pressing plate (211) is parallel to the plate surface of the dust scraping plate (210), and the orthographic projection of the dust scraping plate pressing plate (211) in the plane where the plate surface of the dust scraping plate (210) is located is at least partially overlapped with the plate surface of the dust scraping plate (210).
11. A method of determining a pipe deformation position, applied to an in-pipe detector in the pipe deformation position determining apparatus according to any one of claims 1 to 10, the pipe deformation position determining apparatus further comprising a rolling wheel, a measuring wheel and a magnetic sensor; the method comprises the following steps:
when the determining device of the pipeline deformation position moves to a pipeline deformation position, determining the number m of changes of the magnetic induction intensity detected by the magnetic sensor after the pipeline starts to move from the starting point of the pipeline;
determining the mileage l between the deformation position and the starting point according to the diameter d of the rolling wheel, the number n of tooth grooves on the measuring wheel and the change times m of the magnetic induction intensity, wherein the mileage l satisfies the following conditions:
12. an in-duct detector, for use in a device for determining the deformed position of a duct according to any one of claims 1 to 10; the in-pipe detector includes: a processor, a memory, and a computer program stored on the memory and executable on the processor, the processor implementing the method of claim 11 when executing the computer program.
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| CN201910177476.5A CN111664784B (en) | 2019-03-09 | 2019-03-09 | Device and method for determining deformation position of pipeline |
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| CN2411484Y (en) * | 2000-03-03 | 2000-12-20 | 中国石油天然气管道局管道技术公司 | Corrosion defect detection device for underground on-service long distance pipeline |
| US7048089B2 (en) * | 2003-05-07 | 2006-05-23 | Battelle Energy Alliance, Llc | Methods and apparatus for use in detecting seismic waves in a borehole |
| GB0807940D0 (en) * | 2008-05-01 | 2008-06-11 | Pipeline Engineering And Suppl | Pipeline monitoring apparatus and method |
| CN102621218A (en) * | 2012-03-15 | 2012-08-01 | 西南石油大学 | Device and method for measuring detector measuring range in defect magnetic leakage of oil-gas pipeline |
| CN103115245B (en) * | 2013-03-12 | 2015-05-20 | 包胜 | Pipeline detection device based on piezomagnetic effect |
| CN104048164B (en) * | 2014-06-16 | 2016-09-28 | 东北大学 | A kind of in-pipeline detector mileage measurement apparatus and method |
| CN205192423U (en) * | 2015-05-18 | 2016-04-27 | 中海石油(中国)有限公司 | Detect in pipeline with detection device in mileage measurement mechanism and pipeline magnetic leakage |
| CN107144629B (en) * | 2017-05-26 | 2018-03-23 | 东北石油大学 | A kind of hand-held pipe welding seam leakage magnetic detection device and its detection method |
| CN109001294B (en) * | 2017-06-06 | 2024-01-30 | 中国石油天然气股份有限公司 | Pipeline inner wall detection device |
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