CN110076491B - Welding position monitoring device for inner weld joint of spiral welded pipe - Google Patents
Welding position monitoring device for inner weld joint of spiral welded pipe Download PDFInfo
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- CN110076491B CN110076491B CN201910500174.7A CN201910500174A CN110076491B CN 110076491 B CN110076491 B CN 110076491B CN 201910500174 A CN201910500174 A CN 201910500174A CN 110076491 B CN110076491 B CN 110076491B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
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- Optics & Photonics (AREA)
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- Butt Welding And Welding Of Specific Article (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention belongs to the technical field of spiral pipe welding, and particularly relates to a device for monitoring welding positions of welding seams in a spiral welded pipe. Including the erection support, be provided with the camera on the erection support, the camera front end of camera is provided with leading through-hole, is located in the camera of camera the rear of leading through-hole is provided with the lenticular lens, and the cover is equipped with first tubular screw thread regulation distance component and second tubular screw thread regulation distance component in order between the lenticular lens and the camera lens installation internal thread district of camera, and the camera has the display through cable junction. The vision is contracted through the front through hole, and the luminous object can still be seen under 4 lux, so that the selective transmission of the weld image is ensured; the double-sided convex lens plays a role in focusing and parallel transmitting the corrected information image; the inner weld back thermal image area selected by the camera is transmitted to the display screen through the cable, the image is clear, the operator observes clearly, the visual fatigue is small, and the quality defects such as steel tube burn-through and the like can not occur.
Description
Technical Field
The invention belongs to the technical field of spiral pipe welding, and particularly relates to a device for monitoring welding positions of welding seams in a spiral welded pipe.
Background
In the welding of spiral seam submerged arc welded pipe, inner welding and outer welding are simultaneously and continuously welded. The inner welding is performed at a position around 6 points of the starting position of the first screw pitch after the steel pipe is formed, the outer welding is performed at a position around 12 points of the second or third screw pitch, the inner welding gun is performed inside the steel pipe, an operator can monitor and track whether an inner welding pool is in a seam line or not (a seam formed by the forming and meshing of the steel pipe) by observing the red line on the back surface (outside the pipe) of the inner welding seam, and if the center of an inner welding pool deviates from the center of the seam gap, the correction can be performed by operating a welding head moving device. The inner welding is monitored and tracked according to the red line on the back (outside the pipe) of the inner welding, and the inner welding is sometimes deviated due to untimely judgment or visual error due to the influence of the light intensity of the red line on the back (outside the pipe) of the inner welding, the observation visual angle of an operator and the visual fatigue degree.
Monitoring and tracking of internal welds has been a concern. In low steel grade, thin wall thickness steel pipe welding, an operator can monitor the inner weld by observing the back (outside the pipe) red line of the inner weld. However, as spiral welded pipes are developed to high steel grade, large caliber and large wall thickness, the monitoring of the inner weld pool in the center of the weld gap by observing the red line is not satisfactory because: (1) The plate is too thick, and the welded red line is dark and is not easy to observe; (2) When the edge milling grooves on two sides of the steel belt are inconsistent, heat conduction is faster when one side with a thinner groove is welded, so that the center of a red area of an inner weld joint just welded outside a pipe is not coincident with the center of a weld joint gap, and if the inner weld joint is monitored by the method, misjudgment is easy to generate, so that welding bias is caused; (3) The welding current can be increased, the line energy can be increased, and the red line can keep a certain brightness, but the surface of the inner welding line is irregular, when the steel pipe is formed unstably and the meshing gap of the steel pipe is enlarged, light leakage is easy to burn through, and quality defects such as burn-through are caused.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art, and provides a welding position monitoring device for an inner welding seam of a spiral welding pipe, which is used for detecting and tracking whether the position of the inner welding seam of the spiral welding pipe is correct, so that the welding deviation of the inner welding seam is effectively prevented, and the comfort of an operator is improved.
The technical scheme for solving the technical problems is as follows: the utility model provides a weld welding position monitoring devices in spiral welded tube, includes the erection support, be provided with the camera on the erection support, the camera front end of camera is provided with leading through-hole, be located in the camera of camera the rear of leading through-hole is provided with the double faced convex lens, the double faced convex lens with overlap in order between the camera lens installation internal thread district of camera is equipped with first tubular screw thread and adjusts apart from component and second tubular screw thread and adjust apart from component, the camera has the display through cable junction.
Further, the first and second tubular thread adjustment distance members are used to adjust a focal length of the camera.
Further, the first and second tubular thread adjusting distance members have a length in the range of 3.5-5.0cm.
Further, the double-faced convex mirror is a double-faced convex mirror with different front and back focal lengths.
Further, the front through hole comprises a hexagonal body, and a round hole is formed in the hexagonal body.
Further, the aperture of the preposed through hole is 0.5-1.5cm.
Further, the camera is a high definition camera.
The beneficial effects of the invention are as follows:
1. the invention has the advantages that the vision field is contracted through the round hole of the front through hole, the weld line area after internal welding is directionally selected to the front through hole, the front through hole forms a camera bellows, the luminous object can still be seen under 4 lux, and the selective transmission of the weld line image is ensured;
2. the rear part of the front through hole is provided with the double-sided convex lens which plays a role in focusing and parallel transmitting correction information images;
3. the invention transmits the heat affected zone on the back side (outside the pipe) of the inner welding seam selected and shot by the camera through the cable to the display screen, the image is clear, the image is adjusted to a proper amplification ratio through the pipe thread adjusting distance component, the operator observes clearly, the visual fatigue is small, and the welding seam quality defects such as steel pipe burning-through and the like can not occur.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a device for monitoring the welding position of a weld in a spiral welded pipe according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the front via in FIG. 1;
reference numerals:
1-a front through hole; 11-a hexagonal body; 12-round holes; 2-a double-sided convex mirror; 3-a first tubular thread adjusting distance member; 4-a second tubular thread adjustment distance member; 5-mounting a support; 6-camera; 7-a cable; 8-display.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is two or more unless specifically defined otherwise.
In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Examples
As shown in fig. 1-2, the device for monitoring the welding position of the welding seam in the spiral welding pipe provided by the invention comprises a mounting support 5, wherein a camera 6 is arranged on the mounting support 5, a front through hole 1 is arranged at the front end of a camera of the camera 6, the front through hole 1 comprises a hexagonal body 11, a round hole 12 is arranged on the hexagonal body 11, a double-faced lens 2 is arranged behind the front through hole 1 in the camera of the camera 6, a first tubular thread adjusting distance member 3 and a second tubular thread adjusting distance member 4 are sequentially sleeved between the double-faced lens 2 and a camera lens mounting internal thread region of the camera 6, and the camera 6 is connected with a display 8 through a cable 7.
Further, the first and second tubular screw thread adjustment distance members 3 and 4 are used to adjust the focal length of the camera 6.
Further, the length of the first tubular thread adjusting distance member 3 and the second tubular thread adjusting distance member 4 is in the range of 3.5-5.0cm.
Further, the lenticular lens 2 is a lenticular lens with different focal lengths on the front and back sides.
Further, the aperture of the round hole 12 of the front through hole 1 is 0.5-1.5cm.
Further, the camera 6 is a high definition camera.
When the device is specifically used, the visual field is contracted through the round hole 12 of the front through hole 1, the welding seam area on the back surface (outside the tube) of the inner welding seam is directionally selected to the double-faced convex mirror 2 (the front and back focal lengths are different) behind the front through hole 1, a high-definition camera 6 is arranged behind the double-faced convex mirror 2, a first tubular thread adjusting distance component 3 and a second tubular thread adjusting distance component 4 which are 3.5 cm to 5.0cm long are arranged between the double-faced convex mirror 2 and the sensitization of the camera 6, and the tubular thread adjusting distance components 3 and 4 are used for focusing, so that the video definition of the camera 6 is adjustable.
The television signal of the camera 6 is connected to the display 8 through the video cable 7, the image information of the heat affected zone of the weld gap at the back of the inner weld (outside the tube) is displayed on the screen of the display 8, the temperature of the weld line at the back of the center of the molten pool is highest, the corresponding image on the screen is a brighter tubular cylindrical block image, the weld gap is taken as the center, the temperature of the steel plates at two sides of the weld gap is continuously reduced along with the change of the distance from the center, and the image is displayed as a symmetrical gradient darkening image. And judging the deviation of the inner welding pool on the center of the welding seam gap in the steel pipe to correspondingly adjust through the formation of the block image of the center of the tubular cylinder (the thermal imaging of the welding pool on the welding seam gap) on the screen and the change of symmetry.
The mounting bracket 5 is used for adjusting the camera head height and the image display angle of the camera 6.
The invention is suitable for the field of spiral welded pipe manufacture, the thermal imaging image information of the back surface of the inner weld is reliable, the feedback welding condition is timely, the early warning time is adjusted, the image amplification proportion is proper, the observation is clear, the visual fatigue is small, and the labor intensity of operators is reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (3)
1. The utility model provides a weld welding position monitoring devices in spiral welded pipe, includes the erection support, be provided with camera, its characterized in that on the erection support: the front end of the camera is provided with a front through hole, a double-sided convex mirror is arranged in the camera of the camera and positioned behind the front through hole, a first tubular thread adjusting distance component and a second tubular thread adjusting distance component are sequentially sleeved between the double-sided convex mirror and a camera lens installation internal thread area of the camera, and the camera is connected with a display through a cable;
the first tubular thread adjusting distance member and the second tubular thread adjusting distance member are used for adjusting the focal length of the camera;
the double-sided convex mirror is a double-sided convex mirror with different front and back focal lengths;
the front through hole comprises a hexagonal body, a round hole is formed in the hexagonal body, and the round hole is used for directionally selecting a welding seam area on the back of the inner welding seam to a double-sided convex mirror behind the front through hole;
the aperture of the round hole of the preposed through hole is 0.5-1.5cm;
the display is used for displaying image information of a heat affected zone of the weld joint gap on the back surface of the inner weld joint, wherein the image information is a symmetrical gradient darkening image, and the gradient darkening image is a thermal imaging block image of a molten pool on the weld joint gap.
2. A device for monitoring the welding position of an inner weld of a spiral welded pipe according to claim 1, wherein: the length of the first tubular thread adjusting distance component and the second tubular thread adjusting distance component ranges from 3.5 cm to 5.0cm.
3. A device for monitoring the welding position of an inner weld of a spiral welded pipe according to claim 1, wherein: the camera is a high definition camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910500174.7A CN110076491B (en) | 2019-06-10 | 2019-06-10 | Welding position monitoring device for inner weld joint of spiral welded pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910500174.7A CN110076491B (en) | 2019-06-10 | 2019-06-10 | Welding position monitoring device for inner weld joint of spiral welded pipe |
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| Publication Number | Publication Date |
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| CN110076491A CN110076491A (en) | 2019-08-02 |
| CN110076491B true CN110076491B (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910500174.7A Active CN110076491B (en) | 2019-06-10 | 2019-06-10 | Welding position monitoring device for inner weld joint of spiral welded pipe |
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Citations (2)
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| CN101454112A (en) * | 2006-06-02 | 2009-06-10 | 弗罗纽斯国际有限公司 | Device for evaluating images of weld spots on a carrier material |
| CN103600155A (en) * | 2013-10-25 | 2014-02-26 | 上海工程技术大学 | Real-time monitoring device for welding robot welding process |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2767037Y (en) * | 2004-11-09 | 2006-03-29 | 中国石油天然气集团公司 | Novel inside welding monitoring device for spiral arc-submerged welding pipe |
| CN201302644Y (en) * | 2008-11-27 | 2009-09-02 | 上海第二工业大学 | Weld pool image collecting and light-filtering device |
| CN205166119U (en) * | 2015-12-10 | 2016-04-20 | 河北工业大学 | Friendly mutual auxiliary device of clear visual molten bath control |
| CN106803873A (en) * | 2017-03-02 | 2017-06-06 | 广州众源网络科技有限公司 | A kind of CCTV camera of focus adjustable |
| KR20190001847A (en) * | 2017-06-28 | 2019-01-07 | 주식회사 사이보그-랩 | Laser vision sensor sturucture attached device for preventing spatter |
| CN107433380A (en) * | 2017-09-20 | 2017-12-05 | 嘉兴锐视智能科技有限公司 | Weld tracker and method |
| CN207198530U (en) * | 2017-09-25 | 2018-04-06 | 海特锐（天津）科技有限公司 | A kind of protection device of industrial camera and camera lens |
| CN210115616U (en) * | 2019-06-10 | 2020-02-28 | 江苏通宇钢管集团有限公司 | Device for monitoring welding position of inner welding seam of spiral welded pipe |
-
2019
- 2019-06-10 CN CN201910500174.7A patent/CN110076491B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101454112A (en) * | 2006-06-02 | 2009-06-10 | 弗罗纽斯国际有限公司 | Device for evaluating images of weld spots on a carrier material |
| CN103600155A (en) * | 2013-10-25 | 2014-02-26 | 上海工程技术大学 | Real-time monitoring device for welding robot welding process |
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| CN110076491A (en) | 2019-08-02 |
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