CN211206377U - Sensitivity calibration sample tube for detecting defects of non-ferromagnetic heat exchanger tube bundle - Google Patents
Sensitivity calibration sample tube for detecting defects of non-ferromagnetic heat exchanger tube bundle Download PDFInfo
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- CN211206377U CN211206377U CN201921199316.2U CN201921199316U CN211206377U CN 211206377 U CN211206377 U CN 211206377U CN 201921199316 U CN201921199316 U CN 201921199316U CN 211206377 U CN211206377 U CN 211206377U
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Abstract
The utility model relates to a detect sensitivity of non-ferromagnetic heat exchanger tube bank defect and mark appearance pipe belongs to the pipeline nondestructive test field. The cylindrical pipe body is provided with a first through hole, a third through hole and a fifth through hole which are artificially defective along the axial direction of the cylindrical pipe body, wherein the second through hole is positioned between the first through hole and the third through hole and is 120 degrees apart clockwise along the circumferential direction, and the fourth through hole is positioned between the third through hole and the fifth through hole and is 120 degrees apart anticlockwise along the circumferential direction. The advantage is novel structure, according to the common defect kind of non-ferromagnetic heat exchanger tube bank manufacturing, operation period, the different defect of manual work manufacturing on same sensitivity regulation sample pipe, can realize debugging far field vortex probe and acoustic pulse detection simultaneously on a sample pipe, has increased substantially detection efficiency, has solved and has need change sample pipe scheduling problem among the traditional detection method, has improved work efficiency, convenient and fast is fit for the multi-channel rapid survey.
Description
Technical Field
The utility model belongs to the pipeline nondestructive test field especially relates to a sensitivity that is used for far field vortex and acoustic pulse to detect non-ferromagnetic heat exchanger tube bank defect simultaneously marks appearance pipe.
Background
The heat exchanger tube bundle is widely applied to the industries of petroleum, chemical engineering, electric power and the like. Frequent leakage of heat exchanger tube bundles in industries such as petroleum, chemical industry, electric power and the like causes production halt, thereby not only causing economic loss of enterprises, but also even threatening the life safety of field workers. Due to various defects of the heat exchanger tube bundle in the processes of manufacturing, installation, service and the like, potential safety hazards are brought to a pipeline transportation system, and the pipeline frequently leaks to cause unplanned production halt, so that huge economic loss of enterprises is caused, and even the life safety of field workers is threatened. Therefore, the nondestructive testing technology or equipment for the service pipeline can be quickly and effectively carried out, and people pay attention to the technology or equipment.
The conventional nondestructive detection method for the non-ferromagnetic heat exchanger pipe bundle at present is a common eddy current detection technology and an acoustic pulse detection technology; wherein:
(1) acoustic pulse detection:
when needs acoustic pulse detection, with the probe right side insert in being detected intraductal, press "acoustic pulse detection" button on the probe, the acoustic pulse is detecting the wave form sketch map, high frequency loudspeaker send a cluster excitation pulse wave along the pipeline propagation in-process, when meetting hindrance or defect, can produce the reflection echo, audio sensor acquires this echo signal, send analytic system and show the waveform after frequency-selecting filtering processing, the penetrability defect is if hole and the crackle that runs through the pipe wall, the echo signal phase place is first negative back positive: obstructive defects including pits, blockages, tube deformation, etc., the phase of the echo signal is positive and negative.
(2) And (3) far-field eddy current detection:
the eddy current test is a nondestructive test method based on the electromagnetic induction principle, and is suitable for conductive materials. When a conductor is placed in an alternating magnetic field, an induced current exists in the conductor, i.e., eddy currents are generated. The detection method for determining the properties and the state of the conductor by utilizing the phenomenon that the eddy current changes due to the change of various factors (such as conductivity, permeability, shape, size, defects and the like) of the conductor is called eddy current detection.
The detection principle is as follows: the principle by which far field eddy current technology works is to detect changes in the alternating electromagnetic field emitted by the sensor. The electromagnetic field is sent by the sensor to act on the metal pipeline and is enhanced at the place with metal loss, and the electromagnetic field is received by the receiving sensor, converted by the analog-to-digital converter and processed by the digital processor. The detection data is stored in the detector.
Through the analysis, the common eddy current detection efficiency is high; the detection speed is high and 100% of detection is realized; the sensitivity to corrosion type defects is high. But the detection sensitivity of the common vortex to the blockage type defect and the perforation type defect in the pipe is lower. In addition, the direct application of the conventional eddy current technique to the tube bundle inspection of the heat exchanger still has some problems, for example, it cannot distinguish the outer wall defects and the inner defects of the tubes, and cannot detect the blind areas existing near the tube blockage and the tube plate. The acoustic pulse detection technology has higher detection sensitivity for the blockage type defects and the perforation type defects in the pipe, has the advantages of long detection distance, large detection coverage, high detection speed, no influence of pipe materials and the like, can make up for the defects of far-field eddy current, is not sensitive to internal corrosion and cannot detect the external corrosion of the pipeline,
according to related standards, the detection defect types and the sensitivities of the common eddy current detection and the acoustic pulse detection non-ferromagnetic heat exchanger tube are different, so that if the two technologies are combined, the defect meeting the requirements of the common eddy current detection and the acoustic pulse detection needs to be designed on one sensitivity calibration sample tube.
Disclosure of Invention
The utility model provides a sensitivity that detects non-ferromagnetic heat exchanger tube bank defect marks appearance pipe to solve and not satisfy far field eddy current detection and the problem that the acoustic pulse detected the requirement defect on the appearance pipe is markd to sensitivity at present.
The utility model adopts the technical proposal that: the axial direction of the cylindrical pipe body is provided with a first through hole, a third through hole and a fifth through hole with artificial defects, the length of the pipe body is 1000mm, the distance from the first through hole to the left end of the pipe body is less than or equal to 100mm, and the distance from the fifth through hole to the right end of the pipe body is less than or equal to 100 mm; the two artificial defect through holes are positioned between the first through hole and the third through hole and are spaced at 120 degrees in the clockwise direction along the circumferential direction, the four artificial defect through holes are positioned between the third through hole and the fifth through hole and are spaced at 120 degrees in the anticlockwise direction along the circumferential direction, and the apertures of the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole are the same;
the three through holes are positioned at the middle point of the connecting line of the first through hole and the fifth through hole;
the axial distance between the second through hole and the third through hole is 50 mm;
the axial distance between the fourth through hole and the third through hole is 50 mm;
when the outer diameter d of the pipe body is less than or equal to 10mm, the aperture of the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole is 0.4 mm; when d is more than 10 and less than or equal to 20, the aperture of the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole is 0.6 mm; when d is more than 20 and less than or equal to 30, the aperture of the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole is 0.8 mm; when d is more than 30 and less than or equal to 40, the aperture of the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole is 1.0 mm; when d is more than 40 and less than or equal to 50, the aperture of the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole is 1.2 mm.
The utility model has the advantages of novel structure, according to non-ferromagnetic heat exchanger tube bank manufacturing, the common defect kind during operation, the different defect of manual work manufacturing on same sensitivity regulation sample pipe, can realize debugging far field vortex probe and acoustic pulse detection simultaneously on a sample pipe, detection efficiency has been increased substantially, need change sample pipe scheduling problem in having solved traditional detection method, work efficiency is improved, and is convenient and fast, and be fit for the multi-channel rapid survey, but wide application in the non-ferromagnetic heat exchanger tube bank short-term test in fields such as oil, chemical industry, electric power, steel factory.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
fig. 4 is a cross-sectional view C-C of fig. 1.
Detailed Description
The axial direction of the cylindrical pipe body 1 is provided with a first through hole 2, a third through hole 4 and a fifth through hole 6 with artificial defects, the length of the pipe body 1 is 1000mm, the distance from the first through hole 2 to the left end of the pipe body is less than or equal to 100mm, and the distance from the fifth through hole 6 to the right end of the pipe body is less than or equal to 100 mm; the artificial defect through hole II 3 is positioned between the through hole I2 and the through hole III 4 and is spaced at 120 degrees clockwise along the circumferential direction, the artificial defect through hole IV 5 is positioned between the through hole III 4 and the through hole V6 and is spaced at 120 degrees anticlockwise along the circumferential direction, and the hole diameters of the through hole I2, the through hole II 3, the through hole III 4, the through hole IV 5 and the through hole V6 are the same;
the third through hole 4 is positioned at the midpoint of the connecting line of the first through hole 2 and the fifth through hole 6;
the axial distance between the second through hole 3 and the third through hole 4 is 50 mm;
the axial distance between the through hole IV 5 and the through hole III 4 is 50 mm;
when the outer diameter d of the pipe body 1 is less than or equal to 10mm, the aperture of the first through hole 2, the second through hole 3, the third through hole 4, the fourth through hole 5 and the fifth through hole 6 is 0.4 mm; when d is more than 10 and less than or equal to 20, the aperture of the through hole I2, the aperture of the through hole II 3, the aperture of the through hole III 4, the aperture of the through hole IV 5 and the aperture of the through hole V6 are 0.6 mm; when d is more than 20 and less than or equal to 30, the aperture of the through hole I2, the through hole II 3, the through hole III 4, the through hole IV 5 and the through hole V6 is 0.8 mm; when d is more than 30 and less than or equal to 40, the aperture of the through hole I2, the through hole II 3, the through hole III 4, the through hole IV 5 and the through hole V6 is 1.0 mm; when d is more than 40 and less than or equal to 50, the aperture of the first through hole 2, the second through hole 3, the third through hole 4, the fourth through hole 5 and the fifth through hole 6 is 1.2 mm.
The working principle is as follows:
detecting the artificial defect through hole III 4 by using an acoustic pulse detection instrument, adjusting equipment parameters to enable the acoustic pulse detection equipment to detect the defect of the through hole III 4, ensuring high sensitivity and storing related parameters;
detecting the defects of the artificial defect through hole I2, the artificial defect through hole II 3, the artificial defect through hole III 4, the artificial defect through hole IV 5 and the artificial defect through hole V6 by using a far-field eddy current detection instrument, adjusting equipment parameters to enable acoustic pulse detection equipment to detect corresponding defects, and enabling the acoustic pulse detection equipment to have high sensitivity and storing related parameters;
later in the witnessed inspections, use the relevant parameter of two kinds of above-mentioned equipment, the testing tube is treated to the testing scene, the utility model discloses can provide the required relevant sample of this standard detection of execution simultaneously for two kinds of detection methods to satisfy the standard completely.
Claims (5)
1. The utility model provides a sensitivity of detecting non-ferromagnetic heat exchanger tube bundle defect marks appearance pipe which characterized in that: the axial direction of the cylindrical pipe body is provided with a first through hole, a third through hole and a fifth through hole with artificial defects, the length of the pipe body is 1000mm, the distance from the first through hole to the left end of the pipe body is less than or equal to 100mm, and the distance from the fifth through hole to the right end of the pipe body is less than or equal to 100 mm; the two artificial defect through holes are located between the first through hole and the third through hole and are spaced at 120 degrees in the clockwise direction along the circumferential direction, the four artificial defect through holes are located between the third through hole and the fifth through hole and are spaced at 120 degrees in the anticlockwise direction along the circumferential direction, and the aperture of the first through hole, the aperture of the second through hole, the aperture of the third through hole, the aperture of the fourth through hole, the aperture of the fifth through hole and the aperture of the fourth through.
2. The sensitivity calibration sample tube for detecting the defects of the tube bundle of the non-ferromagnetic heat exchanger according to claim 1, wherein: and the three through holes are positioned at the middle point of the connecting line of the first through hole and the fifth through hole.
3. The sensitivity calibration sample tube for detecting the defects of the tube bundle of the non-ferromagnetic heat exchanger according to claim 1, wherein: and the axial distance between the second through hole and the third through hole is 50 mm.
4. The sensitivity calibration sample tube for detecting the defects of the tube bundle of the non-ferromagnetic heat exchanger according to claim 1, wherein: and the axial distance between the fourth through hole and the third through hole is 50 mm.
5. The sensitivity calibration sample tube for detecting the defects of the tube bundle of the non-ferromagnetic heat exchanger according to claim 1, wherein: when the outer diameter d of the pipe body is less than or equal to 10mm, the aperture of the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole is 0.4 mm; when d is more than 10 and less than or equal to 20, the aperture of the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole is 0.6 mm; when d is more than 20 and less than or equal to 30, the aperture of the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole is 0.8 mm; when d is more than 30 and less than or equal to 40, the aperture of the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole is 1.0 mm; when d is more than 40 and less than or equal to 50, the aperture of the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole is 1.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921199316.2U CN211206377U (en) | 2019-07-26 | 2019-07-26 | Sensitivity calibration sample tube for detecting defects of non-ferromagnetic heat exchanger tube bundle |
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| CN201921199316.2U CN211206377U (en) | 2019-07-26 | 2019-07-26 | Sensitivity calibration sample tube for detecting defects of non-ferromagnetic heat exchanger tube bundle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340982A (en) * | 2021-05-14 | 2021-09-03 | 中石化石油机械股份有限公司沙市钢管分公司 | Magnetic flux leakage detection equipment calibration device and detection method for surface quality of steel pipe |
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- 2019-07-26 CN CN201921199316.2U patent/CN211206377U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340982A (en) * | 2021-05-14 | 2021-09-03 | 中石化石油机械股份有限公司沙市钢管分公司 | Magnetic flux leakage detection equipment calibration device and detection method for surface quality of steel pipe |
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