CN111735873B - Online nondestructive testing device for carbon fiber composite core rod and application thereof - Google Patents
Online nondestructive testing device for carbon fiber composite core rod and application thereof Download PDFInfo
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- CN111735873B CN111735873B CN202010445775.5A CN202010445775A CN111735873B CN 111735873 B CN111735873 B CN 111735873B CN 202010445775 A CN202010445775 A CN 202010445775A CN 111735873 B CN111735873 B CN 111735873B
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- core rod
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- composite core
- type clamp
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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
- G01N29/041—Analysing solids on the surface of the material, e.g. using Lamb, Rayleigh or shear waves
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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
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0231—Composite or layered materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses an online nondestructive testing device for a carbon fiber composite core rod, which comprises an insulating track type clamp, an ultrasonic workbench and a range finder; the insulation track type clamp is a hollow box body with an opening at the bottom surface, a plurality of wheel rails used for clamping the carbon fiber composite core rod are arranged in the box body, the ultrasonic workbench is arranged above the bottom surface of the box body, the range finder is arranged on the side surface of the box body, and the ultrasonic workbench comprises a telescopic ultrasonic probe, a couplant box, a wave speed calculation module and a signaling module. The invention also discloses application of the device. The invention utilizes the propagation of ultrasonic waves on the aluminum twisted wire to detect whether the core rod fracture condition exists in the detected section on line, has lower cost, is simple and efficient, and can be widely applied to the field of detection of the core rod of the carbon fiber material.
Description
Technical Field
The invention belongs to the field of nondestructive testing of carbon fiber composite material core rods, and particularly relates to an online nondestructive testing device for a carbon fiber composite material core rod and application thereof.
Background
The carbon fiber composite material guide rod is an important material for high-voltage wires in the field of power transmission, can greatly reduce the sag deformation of the power transmission line between long-distance towers due to the advantages of strong strength, rigidity, environmental adaptability and the like, has light weight and strong corrosion resistance, can be used as a substitute of a steel core, and has wide application prospect in the field of power transmission.
The carbon fiber composite core rod has obvious advantages in application to power transmission lines, but also has disadvantages. The carbon fiber composite material can generate brittle fracture under the action of bearing a certain load, so that the surface or the inside of the core rod is damaged, the core rod is broken by serious damage, and the core rod is damaged due to construction or other reasons in the construction and wire erection process, so that potential safety hazards to a power transmission line are generated.
The high-voltage transmission line commonly used in the prior art is of a multi-layer structure, thicker aluminum stranded wires are arranged outside the carbon fiber composite core rod, and once the line is erected, the core rod is wrapped by the aluminum stranded wires, so that if a certain problem occurs to the core rod, the core rod is difficult to find from outside. Meanwhile, if the carbon fiber composite core rod is broken, acting force at two ends of the tower and dead weight load of the power transmission line are all stressed on the aluminum stranded wire, so that internal stress of the aluminum stranded wire is increased. Whether the core rod breaks or not can not be obviously observed outside the stranded wire, but the aluminum stranded wire is easy to sag, creep and even break because of bearing all acting forces and dead weight loads and adding additional loads under natural conditions.
At present, the detection research and means of the multilayer high-voltage power transmission line at home and abroad are few, and the requirements of safe and stable work, timely fault discovery and feedback of the high-voltage power transmission line are hardly met.
Disclosure of Invention
The invention aims to provide a quick, efficient and environment-friendly online nondestructive testing device for a carbon fiber composite core rod.
The invention also solves the technical problem of providing the application of the on-line nondestructive testing device for the carbon fiber composite core rod.
In order to solve the technical problems, the invention adopts the following technical scheme:
an on-line nondestructive testing device for a carbon fiber composite core rod comprises an insulating track type clamp, an ultrasonic workbench and a range finder; the insulation track type clamp is a hollow box body with an opening at the bottom surface, a plurality of wheel rails used for clamping the carbon fiber composite core rod are arranged in the box body, the ultrasonic workbench is arranged above the bottom surface of the box body, the range finder is arranged on the side surface of the box body, and the ultrasonic workbench comprises a telescopic ultrasonic probe, a couplant box, a wave speed calculation module and a signaling module. The ultrasonic workbench is an ultrasonic control device existing in the prior art.
Preferably, the number of the wheel tracks is 4, and the wheel tracks are arranged inside the insulated track type clamp in a diagonal line. The number of the wheel tracks is not limited to 4, and the method of setting the wheel tracks is not limited to diagonal setting, as long as the transmission line can be clamped.
Preferably, the hollow box body is 10cm long, 15cm wide and 15cm high.
Preferably, the telescopic ultrasonic probe is 15mm long, 10mm wide and 8mm high, and emits a surface wave with a frequency of 5 MHz.
Preferably, the wheel rail is a spherical wheel, and the diameter of the spherical wheel is 2cm.
Preferably, the wheel rail comprises an upper wheel rail and a lower wheel rail, the lower wheel rail is arranged at an opening of the bottom surface of the insulated track type clamp, and the lower wheel rail is connected with the insulated track type clamp through a wheel rail elastic device. The opening size of the bottom surface of the insulated rail type clamp can be controlled by tightening or loosening the tightening device, so that the insulated rail type clamp can be installed on a power transmission line, and the adjustable range of the opening width is 2-8 cm
Preferably, the distance meter is an infrared distance meter, and the precision is 2mm.
An online nondestructive testing method for a carbon fiber composite core rod comprises the following steps:
(1) Installing a carbon fiber composite material core rod on-line detection device, controlling a wheel rail of one group of carbon fiber composite material core rod on-line detection devices to clamp a power transmission line, fixing another group of carbon fiber composite material core rod on-line detection devices at a 10m distance, and arranging distance meters of the two groups of carbon fiber composite material core rod on-line detection devices relatively;
(2) Controlling an ultrasonic workbench to put down an ultrasonic probe and pass through the couplant box, enabling the ultrasonic probe to be attached to an aluminum stranded wire, recording ultrasonic propagation time t and calculating to obtain wave velocity v;
(3) Moving the two groups of devices to the next test point, repeating the steps and detecting;
(4) Comparing the wave velocity v i (i=1, 2,3 … …) if the wave velocity value at a segment is significantly lower than the ensemble average wave velocity, then the segment is considered to be the suspicious fracture location of the mandrel;
(5) And (5) ending the detection and recovering the device.
The beneficial effects are that:
the invention discloses an online nondestructive testing device for a carbon fiber composite core rod and application thereof, which avoid repeated test and resource waste in the traditional method, improve the test efficiency, save the research cost, and are more efficient, environment-friendly and easy to operate. Meanwhile, the method can simply judge the fracture position of the carbon fiber composite core rod, monitor and feed back the fracture position on line, has strong practicability and easy popularization, and can be widely applied to the field of nondestructive testing of the carbon fiber composite core rod.
Drawings
FIG. 1 is a schematic axial cross-section of the present invention mounted on an aluminum twisted wire.
Fig. 2 is a schematic diagram of a set of two sets of equipment mounted on an aluminum twisted wire.
In fig. 1-2, 1, a carbon fiber composite core rod; 2. aluminum stranded wires; 3. an insulated rail clamp; 4. an ultrasonic workbench; 5. a retractable ultrasonic probe; 6. a couplant box; 7. wheel rail; 8. wheel rail elasticity device; 9. a distance measuring instrument.
Detailed Description
The invention will now be described in further detail with reference to the drawings and specific embodiments. The drawings are simplified schematic representations as well as being described for further illustrating the features and advantages of the present invention, and are not limiting upon the claims of the present invention.
Example 1
The on-line nondestructive testing of a certain 50m JRLX/T-460 composite wire core rod comprises the following operation steps:
first, installing a carbon fiber composite core rod on-line detection device, loosening a wheel rail loosening and tightening device 8 of a wheel rail 7, manually erecting an insulating rail type clamp on an aluminum stranded wire, controlling the width of an opening to be 40mm so as to clamp the power transmission line, and simultaneously, shrinking a lower wheel rail to enable the whole equipment to move on the aluminum stranded wire 2, as shown in fig. 1. Using a distance meter 9 to fix another set of equipment clamping power lines in the same way at a distance of 10m, as shown in fig. 2;
secondly, controlling an ultrasonic workbench to put down a telescopic ultrasonic probe 5 to pass through a couplant box 6, attaching an aluminum stranded wire 2, recording ultrasonic propagation time t and calculating to obtain wave velocity v;
step three, moving the two groups of devices to the next 10m test section, repeating the steps to detect, record and calculate;
fourth, comparing the wave velocity v of each place 1 ，v 2 ，v 3 ，v 4 ，v 5 The section corresponding to the small wave speed value is the fracture possibility of the 50m JRLX/T-460 composite wire core rodA suspicious site;
and fifthly, finishing detection and recovering the device.
Example 2
The on-line nondestructive testing of a 150m JRLX/T-460 composite wire core rod comprises the following operation steps:
first, installing a carbon fiber composite core rod on-line detection device, loosening a wheel rail loosening and tightening device 8 of a wheel rail 7, manually erecting an insulating rail type clamp on an aluminum stranded wire 2, controlling the width of an opening to be 40mm so as to clamp a power transmission line, and simultaneously, shrinking a lower wheel rail to enable the whole equipment to move on the aluminum stranded wire, as shown in fig. 1. Using an infrared rangefinder to fix another set of equipment clamping power lines in the same way at a pitch of 10m, as shown in fig. 2;
secondly, controlling an ultrasonic workbench to put down a telescopic ultrasonic probe 5 to pass through a couplant box 6, attaching an aluminum stranded wire 2, recording ultrasonic propagation time t and calculating to obtain wave velocity v;
step three, moving the two groups of devices to the next 10m test section, repeating the steps to detect, record and calculate;
fourth, comparing the wave velocity v of each place i (i=1, 2,3, … …), the section corresponding to the smaller wave speed value is the fracture suspicious position of the 150mJRLX/T-460 composite wire core rod;
and fifthly, finishing detection and recovering the device.
Example 3
The on-line nondestructive testing of a 50m ACCC/TW composite wire core rod comprises the following operation steps:
first, installing a carbon fiber composite core rod on-line detection device, loosening a wheel rail loosening and tightening device 8 of a wheel rail 7, manually erecting an insulating rail type clamp on an aluminum stranded wire 2, controlling the width of an opening to be 20mm so as to clamp a power transmission line, and simultaneously, shrinking a lower wheel rail to enable the whole equipment to move on the aluminum stranded wire, as shown in fig. 1. Using an infrared rangefinder to fix another set of equipment clamping power lines in the same way at a pitch of 10m, as shown in fig. 2;
secondly, controlling an ultrasonic workbench to put down a telescopic ultrasonic probe 5 to pass through a couplant box 6, attaching an aluminum stranded wire 2, recording ultrasonic propagation time t and calculating to obtain wave velocity v;
step three, moving the two groups of devices to the next 10m test section, repeating the steps to detect, record and calculate;
fourth, comparing the wave velocity v of each place 1 ，v 2 ，v 3 ，v 4 ，v 5 The section corresponding to the small wave speed value is the fracture suspicious position of the 50m ACCC/TW composite wire core rod;
and fifthly, finishing detection and recovering the device.
Claims (5)
1. An on-line nondestructive testing device for a carbon fiber composite core rod is characterized in that: the online nondestructive testing device comprises two groups of testing equipment, wherein each group of testing equipment comprises: an insulating track type clamp (3), an ultrasonic workbench (4) and a range finder (9); the insulation track type clamp (3) is a hollow box body with an opening at the bottom surface, a plurality of wheel rails (7) for clamping a carbon fiber composite core rod are arranged in the box body, the ultrasonic workbench (4) is arranged above the bottom surface of the box body, the range finder (9) is arranged on the side surface of the box body, and the ultrasonic workbench (4) comprises a telescopic ultrasonic probe, a couplant box (6), a wave speed calculation module and a signaling module; the telescopic ultrasonic probe (5) is placed down by the ultrasonic workbench, passes through the couplant box (6) and is attached with the aluminum stranded wire (2);
the number of the wheel tracks (7) is 4, and the wheel tracks (7) are diagonally arranged in the insulating track type clamp (3);
the length of the insulating track type clamp (3) is 10cm, the width of the insulating track type clamp is 15cm, and the height of the insulating track type clamp is 15cm;
the length of the telescopic ultrasonic probe (5) is 15mm, the width of the telescopic ultrasonic probe is 10mm, the height of the telescopic ultrasonic probe is 8mm, and the launching frequency of the telescopic ultrasonic probe is 5 MHz.
2. The on-line nondestructive testing device for a carbon fiber composite core rod according to claim 1, wherein: the wheel rail (7) is a spherical wheel, and the diameter of the spherical wheel is 2cm.
3. The on-line nondestructive testing device for a carbon fiber composite core rod according to claim 2, wherein: the wheel rail (7) comprises an upper wheel rail and a lower wheel rail, the lower wheel rail is arranged at an opening of the bottom surface of the insulation track type clamp (3), and the lower wheel rail is connected with the insulation track type clamp (3) through a wheel rail loosening and tightening device (8).
4. The on-line nondestructive testing device for a carbon fiber composite core rod according to claim 1, wherein: the range finder (9) is an infrared range finder, and the precision is 2mm.
5. An online nondestructive testing method for a carbon fiber composite core rod is characterized by comprising the following steps:
(1) Installing the on-line detection device of the carbon fiber composite core rod according to any one of claims 1-4, controlling a wheel rail (7) of one group of the on-line detection devices of the carbon fiber composite core rod to clamp the power transmission line, fixing the other group of the on-line detection devices of the carbon fiber composite core rod at a distance of 10m to clamp the power transmission line, and arranging distance measuring devices (9) of the two groups of the on-line detection devices of the carbon fiber composite core rod oppositely;
(2) Controlling an ultrasonic workbench to lower a telescopic ultrasonic probe (5) and pass through a couplant box (6), enabling the telescopic ultrasonic probe (5) to be attached to an aluminum stranded wire, recording ultrasonic propagation time t and calculating to obtain wave velocity v;
(3) Moving the two groups of devices to the next test point, repeating the steps and detecting;
(4) Comparing the wave velocity v i I=1, 2,3 … …, if the wave velocity value at a certain section is obviously lower than the overall average wave velocity, the section is considered as the suspicious breaking position of the core rod;
(5) And (5) ending the detection and recovering the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010445775.5A CN111735873B (en) | 2020-05-25 | 2020-05-25 | Online nondestructive testing device for carbon fiber composite core rod and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010445775.5A CN111735873B (en) | 2020-05-25 | 2020-05-25 | Online nondestructive testing device for carbon fiber composite core rod and application thereof |
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| Publication Number | Publication Date |
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| CN111735873A CN111735873A (en) | 2020-10-02 |
| CN111735873B true CN111735873B (en) | 2023-07-21 |
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| CN202010445775.5A Active CN111735873B (en) | 2020-05-25 | 2020-05-25 | Online nondestructive testing device for carbon fiber composite core rod and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104251883A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Non-contact rock sound wave speed detection method |
| CN107907597B (en) * | 2017-11-27 | 2024-03-15 | 山东大学 | Device and method for testing water content of penetrating ultrasonic soil body |
| CN110125903B (en) * | 2019-05-14 | 2021-04-13 | 国网江苏省电力有限公司电力科学研究院 | Four-split carbon fiber lead detection robot and system |
| CN110596244A (en) * | 2019-09-29 | 2019-12-20 | 同济大学 | Ultrasonic flaw detection device and method for stay cable |
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