CN115308303A - Constant force device of pipe welding seam ultrasonic nondestructive testing probe - Google Patents
Constant force device of pipe welding seam ultrasonic nondestructive testing probe Download PDFInfo
- Publication number
- CN115308303A CN115308303A CN202110496388.9A CN202110496388A CN115308303A CN 115308303 A CN115308303 A CN 115308303A CN 202110496388 A CN202110496388 A CN 202110496388A CN 115308303 A CN115308303 A CN 115308303A
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- CN
- China
- Prior art keywords
- constant force
- probe
- welding seam
- nondestructive testing
- pipe welding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000523 sample Substances 0.000 title claims abstract description 52
- 238000009659 non-destructive testing Methods 0.000 title claims abstract description 27
- 238000003466 welding Methods 0.000 title claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 230000005484 gravity Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- 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
- G01N2291/0234—Metals, e.g. steel
-
- 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
- G01N2291/26—Scanned objects
- G01N2291/267—Welds
- G01N2291/2675—Seam, butt welding
Abstract
The invention belongs to a constant force device, and particularly relates to a constant force device for a pipe welding seam ultrasonic nondestructive testing probe. A constant force device of a pipe welding seam ultrasonic nondestructive testing probe comprises a constant force generating device and a constant force maintaining device, wherein the constant force generating device is used for generating required force, the constant force maintaining device is used for dynamically adjusting the generated force, and the constant force maintaining device is arranged between an ultrasonic probe and the constant force generating device. The invention has the following remarkable effects: the invention provides a constant force device of a pipe welding seam ultrasonic nondestructive testing probe, relates to the field of nondestructive testing, and solves the technical problem that when an automatic ultrasonic nondestructive testing device is used for testing a horizontally placed pipeline circumferential weld, the probe cannot be attached to the surface of a tested pipeline at constant pressure, so that the testing is inaccurate.
Description
Technical Field
The invention belongs to a constant force device, and particularly relates to a constant force device for a pipe welding seam ultrasonic nondestructive testing probe.
Background
When the automatic ultrasonic nondestructive detection is adopted for the pipeline circumferential weld which is horizontally placed, the pressure applied to the surface of the pipeline by the probe can change along with the movement of the probe along the weld due to the gravity of the probe, so that the detection is inaccurate.
Disclosure of Invention
The invention aims to provide a device which enables an ultrasonic probe to be attached to the surface of a detected pipeline at constant pressure so as to solve the technical problem that the detection result is inaccurate due to the fact that the force applied to the surface of the detected pipeline by the probe is not constant during automatic ultrasonic nondestructive detection.
The invention is realized by the following steps: a constant force device of a pipe welding seam ultrasonic nondestructive testing probe comprises a constant force generating device and a constant force maintaining device, wherein the constant force generating device is used for generating required force, the constant force maintaining device is used for dynamically adjusting the generated force, and the constant force maintaining device is arranged between an ultrasonic probe and the constant force generating device.
The constant force device for the ultrasonic nondestructive testing probe for the pipe welding seam is characterized in that the constant force generating device is a linear stepping motor.
A pipe welding seam supersound nondestructive test probe constant force device as above, wherein, the constant force keep device constitute for the splint of buffer spring and both sides jointly, wherein the splint of buffer spring one side are connected with the output device that violently produces the device, and the splint of buffer spring opposite side are connected with ultrasonic probe.
The constant force device for the ultrasonic nondestructive testing probe for the pipe welding seam is characterized in that the number of the buffer springs is two, and the buffer springs are uniformly arranged between the two clamping plates.
According to the constant force device for the ultrasonic nondestructive testing probe for the pipe welding seam, a through hole is formed in the clamping plate, close to one side of the constant force generating device, of the constant force maintaining device, the position of the through hole corresponds to that of the buffer spring, a spring guide shaft is arranged in the through hole, and a retaining ring for a shaft is arranged on the spring guide shaft.
The constant force device for the ultrasonic nondestructive testing probe for the pipe welding seam is characterized in that a sensor is arranged between the constant force generating device and the constant force maintaining device.
The constant force device for the ultrasonic nondestructive testing probe for the pipe welding seam is characterized in that the constant force device comprises a pressure sensor and a pressure sensor.
The constant force device for the ultrasonic nondestructive testing probe of the pipe welding seam as described above, wherein the following formula is satisfied between the pressure F applied by the probe on the surface of the pipe to be tested and the angle theta of the constant force device moving around the circumference of the pipe to be tested
F＝G×cosθ+F1
Wherein, the gravity G of the probe, the reading F1 of the pulling pressure sensor,
the tensile force is given when F1 is positive, and the compressive force is given when F1 is negative.
The invention has the following remarkable effects: the invention provides a constant force device of a pipe welding seam ultrasonic nondestructive testing probe, relates to the field of nondestructive testing, and solves the technical problem that when an automatic ultrasonic nondestructive testing device is used for testing a horizontally placed pipeline circumferential weld, the probe cannot be attached to the surface of a tested pipeline at constant pressure, so that the testing is inaccurate.
Drawings
FIG. 1 is a schematic diagram of a probe constant force apparatus;
fig. 2 is a schematic diagram of the operation of the probe constant force device.
Wherein 1 ultrasonic probe, 2 buffer spring, 3 draw pressure sensor, 4 linear stepping motor, 5 for the axle retaining ring, 6 spring guiding axles, 7 probe constant force devices, 8 by the test tube.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1, the invention provides a constant force device for a pipe weld ultrasonic nondestructive testing probe, which comprises an ultrasonic probe 1, a buffer spring 2, a tension and pressure sensor 3, a linear stepping motor 4, a shaft retainer ring 5 and a spring guide shaft 6.
Referring to fig. 2, the present invention provides a working schematic diagram of a constant force device for a pipe welding seam ultrasonic nondestructive testing probe, during testing, a linear stepping motor is fed along the radial direction of a pipe to make an ultrasonic probe fit with the surface of a tested pipe, after the ultrasonic probe is fit with the surface of the tested pipe, the linear stepping motor is continuously fed to start to compress a buffer spring, so that the pressure applied to the pipe by the probe is increased. And (4) feeding back data in real time by a pull pressure sensor, and stopping feeding by the linear stepping motor when the pressure value reaches a preset value. The constant force device performs circular motion around the pipe and always keeps the surface of the pressure sensor tangent to the surface of the pipe to be measured. And in the circular motion process, real-time adjustment is carried out according to data fed back by the tension and pressure sensor. When the value fed back by the tension pressure sensor is smaller than the preset pressure value, the linear stepping motor continues to feed; when the value fed back by the pull pressure sensor is larger than the preset pressure value, the linear stepping motor retracts to enable the pressure value to be constant or to fluctuate within a certain small range.
A certain functional relationship exists between the pressure F applied to the surface of the measured pipe by the probe and the angle theta of the constant force device moving around the circumference of the measured pipe (the gravity G of the probe and the reading F1 of the pull pressure sensor are set):
f = G × cos θ + F1 (θ is more than or equal to 0 ° < 360 °, and if F1 is positive, it is tensile force, and if F1 is negative, it is compressive force)
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (8)
1. The utility model provides a pipe welding seam supersound nondestructive test probe constant force device which characterized in that: the ultrasonic probe comprises a constant force generating device and a constant force maintaining device, wherein the constant force generating device is used for generating required force, the constant force maintaining device is used for dynamically adjusting the generated force, and the constant force maintaining device is arranged between the ultrasonic probe (1) and the constant force generating device.
2. The constant force device of the pipe welding seam ultrasonic nondestructive testing probe of claim 1, characterized in that: the constant force generating device is a linear stepping motor (4).
3. The constant force device of the pipe welding seam ultrasonic nondestructive testing probe of claim 2, characterized in that: constant force maintain the splint that the device constitutes for buffer spring (2) and both sides jointly, wherein the splint of buffer spring (2) one side are connected with the output device that violently produces the device, the splint of buffer spring (2) opposite side are connected with ultrasonic probe (1).
4. The constant force device of the pipe welding seam ultrasonic nondestructive testing probe of claim 3, characterized in that: the buffer springs (2) are two in total and are uniformly arranged between the two clamping plates.
5. The constant force device of the pipe welding seam ultrasonic nondestructive testing probe of claim 4, characterized in that: the clamping plate of the constant force maintaining device, which is close to one side of the constant force generating device, is provided with a through hole, the position of the through hole corresponds to that of the buffer spring (2), a spring guide shaft (6) is arranged in the through hole, and a retaining ring (5) for a shaft is arranged on the spring guide shaft (6).
6. The constant force device of the pipe welding seam ultrasonic nondestructive testing probe of claim 5, characterized in that: a sensor is also provided between the constant force generating means and the constant force maintaining means.
7. The constant force device of the pipe welding seam ultrasonic nondestructive testing probe of claim 6, characterized in that: the sensor is a pull pressure sensor (3).
8. The constant force device of the pipe welding seam ultrasonic nondestructive testing probe of claim 7, characterized in that: the pressure F applied on the surface of the measured pipe by the probe and the angle theta of the constant force device moving around the circumference of the measured pipe satisfy the following formula
F＝G×cosθ+F1
Wherein, the gravity G of the probe, the reading F1 of the pull pressure sensor,
the tensile force is given when F1 is positive, and the compressive force is given when F1 is negative.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110496388.9A CN115308303A (en) | 2021-05-07 | 2021-05-07 | Constant force device of pipe welding seam ultrasonic nondestructive testing probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110496388.9A CN115308303A (en) | 2021-05-07 | 2021-05-07 | Constant force device of pipe welding seam ultrasonic nondestructive testing probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115308303A true CN115308303A (en) | 2022-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110496388.9A Pending CN115308303A (en) | 2021-05-07 | 2021-05-07 | Constant force device of pipe welding seam ultrasonic nondestructive testing probe |
Country Status (1)
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| CN (1) | CN115308303A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203000987U (en) * | 2012-12-28 | 2013-06-19 | 汕头市超声仪器研究所有限公司 | Pressure sensing ultrasonic probe used for elastic imaging |
| CN203310811U (en) * | 2013-06-09 | 2013-11-27 | 天津市宏迪工程检测发展有限公司 | Ultrasonic probe with constant pressure |
| CN105699495A (en) * | 2016-03-24 | 2016-06-22 | 江苏科技大学 | Portable ultrasonic probe pressure adjusting device and use method |
| CN205405282U (en) * | 2016-03-03 | 2016-07-27 | 汪月银 | Invariable adjusting device of probe pressure |
| CN208313904U (en) * | 2018-06-13 | 2019-01-01 | 中国科学院声学研究所 | A kind of probe constant pressure clamping device |
-
2021
- 2021-05-07 CN CN202110496388.9A patent/CN115308303A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203000987U (en) * | 2012-12-28 | 2013-06-19 | 汕头市超声仪器研究所有限公司 | Pressure sensing ultrasonic probe used for elastic imaging |
| CN203310811U (en) * | 2013-06-09 | 2013-11-27 | 天津市宏迪工程检测发展有限公司 | Ultrasonic probe with constant pressure |
| CN205405282U (en) * | 2016-03-03 | 2016-07-27 | 汪月银 | Invariable adjusting device of probe pressure |
| CN105699495A (en) * | 2016-03-24 | 2016-06-22 | 江苏科技大学 | Portable ultrasonic probe pressure adjusting device and use method |
| CN208313904U (en) * | 2018-06-13 | 2019-01-01 | 中国科学院声学研究所 | A kind of probe constant pressure clamping device |
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Application publication date: 20221108 |