CN115791843A - Gamma source detection center positioning device and method for butt joint of metal pipeline - Google Patents
Gamma source detection center positioning device and method for butt joint of metal pipeline Download PDFInfo
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Abstract
The invention belongs to the technical field of transillumination of an industrial metal pipeline butt joint gamma ray detection center, and particularly relates to a positioning device and a positioning method for a metal pipeline butt joint gamma source detection center. The invention is organically composed of a gamma source positioning mechanism, a turbine supporting mechanism, a scroll rod, a visual camera, a gamma source conveying and containing mechanism, a scroll rod positioning protection mechanism and a display mechanism. The worm drives the two sets of turbine supporting arms to generate angle change, so that each set of turbine supporting arm props against the inner wall of the pipeline to be tested, the source point is positioned at the central position of the pipeline, the front and back directions of the supporting arms are adjusted according to the position of the selected welding line, and the source point can be selected along with the direction of the supporting arms and placed at the front point or the back point of the device. The visual camera is connected with the display mechanism, and the source point is placed in accurate positioning. The minimum turning radius of the invention is 1.5D, and the invention can meet the ray detection of 90-degree elbows and reducing pipe fitting butt joints with the pipe diameter specification of phi 168mm multiplied by 23 mm.
Description
Technical Field
The invention belongs to the technical field of transillumination of an industrial metal pipeline butt joint gamma ray detection center, and particularly relates to a positioning device and a positioning method for a metal pipeline butt joint gamma source detection center.
Background
The detection of the butt-jointed seam of the petroleum refining device pipeline uses the most extensive nondestructive detection technology at present for ray detection, especially along with the further fine chemical industry of chemical products, the pipeline wall used is thicker and thicker, and the single-wall double-shadow transillumination mode is more and more difficult to meet the requirement of nondestructive detection progress. Especially, in the stage of pipeline installation, the fixed port and overhead operation are increased. The transillumination detection of the center of the pipeline weld joint is an efficient and quick method, and has the advantages of a transverse crack detection angle of 0 degree, high crack detection rate, high sensitivity, short transillumination time, capability of completing all-weld joint detection at one time, low labor intensity and the like. The central transillumination detection technology adopted at present has some defects and shortcomings that the central point is difficult to position, especially the transillumination of butt welding seams of a reducer and a straight pipe or an elbow, the negative quality does not meet the standard requirement, and the main problems are that the focus deviates from the central position of the welding seam, so that the ray negative has uneven blackness and incomplete image and needs to be patched for many times. Therefore, a novel radiographic inspection tool needs to be designed to improve the practicability and convenience of the pipeline radiographic inspection device, ensure the accuracy and operability of the source point in the central position of the pipeline, and become the key task of the design of the visible gamma-source pipeline welding seam center positioning transillumination inspection tool.
There are also some detecting devices in the prior art, such as an adjustable transillumination device for the center of the test tube: the device ZL20121018575.9 mainly realizes that a gamma source reaches the center of a pipeline according to the umbrella type support principle. The device can only be suitable for the butt joint detection of a straight pipe section and a pipe fitting.
Visual multipurpose process pipeline welding seam flaw detection device patent number: the supporting mechanism ZL201710595291.7 enables the supporting arm to vertically enter and exit by utilizing a hydraulic principle, so that the device is located in the center of a pipeline, and the turning mechanism utilizes a spring to pass through an elbow. But after the device passes through the elbow, the gamma source channel is easy to damage, and the use safety of the gamma source is influenced.
Visual thick wall metal pipeline welded joint gamma source central transillumination positioner patent number: the supporting mechanism ZL201710595087.5 enables the supporting arm to vertically enter and exit by utilizing the hydraulic principle, so that the device is located in the center of a pipeline, and the turning mechanism rotates through the elbow by utilizing the spherical joint. However, after passing through the elbow, the gamma source channel is easy to deviate, the spherical joint cannot return, and the gamma source point is influenced to reach the designated position.
In order to solve the problem of the transillumination ray detection of the welding seam centers of industrial straight pipelines, elbows and reducer (reducing adapter pipes), a visual gamma-source pipeline welding seam center positioning transillumination detection device which is simple and convenient to operate and wider in application range needs to be designed. The industrial pipeline is innovatively designed to relate to a positioning device for a gamma source detection center of an elbow and a large-small-head welding line.
Disclosure of Invention
The invention provides a gamma source detection center positioning device and method for a butt joint of a metal pipeline, which are simple and accurate in center point positioning in the metal pipeline, particularly in the case of transillumination of butt welding seams of a reducer and a straight pipe or an elbow, so that a negative film meeting the quality standard requirement is provided.
In order to realize the purpose, the invention adopts the technical scheme that:
a gamma source detection center positioning device for a butt joint of a metal pipeline comprises a gamma source positioning mechanism, a turbine supporting mechanism, a scroll rod, a visual camera, a gamma source conveying and containing mechanism, a scroll rod positioning protection mechanism and a display mechanism; the scroll rod is of a hollow structure; the gamma source positioning mechanism is fixedly connected to the front end surface of the scroll rod or between the scroll rod and the gamma source conveying and accommodating mechanism; the periphery of the scroll rod is connected with a scroll rod positioning protection mechanism; the two groups of turbine supporting mechanisms are connected to two ends of the worm positioning and protecting mechanism and are meshed with the worm; the visual camera is connected between the scroll rod and the gamma source conveying and containing mechanism or any one of the two sets of turbine supporting mechanisms, and is in electric signal connection with a display mechanism arranged on the ground.
The gamma source positioning mechanism comprises a front gamma source positioning head and a rear gamma source positioning head; the rear gamma source positioning head is connected between the rear end of the scroll rod and the gamma source conveying and accommodating mechanism; the prepositive gamma source positioning head is a hollow cylinder with only one end open, and the periphery of the open end is provided with a thread which is matched and connected with the inner side wall of the front end of the scroll rod; the rear gamma source positioning head is a hollow cylinder with an open end, the peripheries of the two ends of the cylinder are both provided with threads, the outer diameter of the open end is larger than that of the other end, and annular limiting bulges are respectively arranged at the joints of the threads at the two ends and the smooth surface of the cylinder.
Each group of turbine supporting mechanisms comprises three supporting rods, and each supporting rod comprises a roller, a turbine supporting arm and a turbine; the turbine supporting arm is fixedly connected with the turbine, and the roller is connected to the free end of the turbine supporting arm; the center of the worm wheel is rotatably connected to the worm rod positioning protection mechanism and is meshed with the worm; the three support rods are uniformly distributed on the same circumference at intervals of 120 degrees.
Each supporting rod further comprises an elongated arm; the extension arm is detachably connected between the roller and the turbine supporting arm.
The turbine supporting arm is fixedly connected with 1/4 of the diameter of the turbine; the upper part of the turbine supporting arm is provided with a plurality of connecting through holes, and the centers of the connecting through holes are collinear with the center of the turbine.
The scroll rod positioning protection mechanism comprises a protection cover positioning ring, a scroll rod protection cover and a connecting mechanism; the protective cover positioning ring is disc-shaped, a circular through hole is formed in the center of the protective cover positioning ring, the scroll protective cover is in a hollow cylindrical shape, the end faces of the two ends of the scroll protective cover are respectively connected with the protective cover positioning rings, and the central circular through hole of each protective cover positioning ring is positioned at the corresponding end of the scroll; the peripheral side walls of the two ends of the scroll rod protective cover are respectively provided with a connecting mechanism; the connecting mechanism is composed of three groups of fixing pieces which are arranged on the same circumference at intervals of 120 degrees, each fixing piece is composed of two side plates which are arranged in parallel, positioning round holes are correspondingly formed in the two side plates, and the plate surfaces of the side plates are parallel to the axis of the scroll rod protective cover.
The display mechanism is a mobile phone; the visual camera adopts a wide-angle visual camera.
The scroll bars adopt three-head scroll bars; the periphery of the two ends of the worm is provided with threads matched with the worm wheel, and the outer wall of the worm outside each thread is provided with an annular positioning groove for positioning the worm positioning protection mechanism; three connecting through holes are uniformly formed in the side wall of the end head at the rear end of the scroll rod; the inner side wall of the front end of the scroll rod and the inner side wall of the rear end of the scroll rod are both provided with threads which are connected with the gamma source positioning mechanism in a matching mode.
The gamma source conveying and accommodating mechanism comprises a gamma source channel, a gamma source driving cable fixing nut and a gamma source conveying line; the front end of the gamma source channel is connected with the rear end face of the scroll rod through a gamma source drive cable fixing nut or connected with a gamma source positioning mechanism connected to the rear end face of the scroll rod; the front end of the gamma source conveying line is connected with a gamma point source, and the gamma point source is positioned in the gamma source positioning mechanism through the gamma source conveying line through a gamma source channel.
A method for positioning a gamma source detection center positioning device of a butt joint of a metal pipeline comprises the following steps,
the method comprises the following steps: putting the gamma source detection center positioning device of the butt joint of the metal pipeline into the pipeline to be detected;
step two: the gamma source channel in the gamma source conveying and containing mechanism is adjusted to drive the worm to rotate left and right, so that the turbines are driven to rotate, each turbine supporting arm in each group of turbine supporting mechanisms is subjected to angle change, and the front ends of the turbine supporting arms abut against the inner wall of the pipeline to be detected;
step three: the center position of the welding bead is aligned by the gamma point source through the visual camera;
step four: and introducing the gamma point source into the hollow space of the scroll through the gamma source channel to reach the designated point.
Has the advantages that:
(1) The invention is suitable for supporting the inner wall of the pipeline with different inner diameters by two groups of six supporting arms, and ensures that the central gamma source is positioned at the central position of the pipeline.
(2) The angle of the supporting arm is driven to change through the worm wheel and worm structure, and the supporting arm can be adjusted within the angle range of 180 degrees, so that the front and back directions of the supporting arm can be conveniently changed, and the detection requirement is met.
(3) The invention designs 3 source point placement modes of a preposed source, a middle source, a postposition source and the like, meets the central transillumination detection of the butt welding seam of the elbow, the tee joint, the reducer and the straight pipe, and effectively solves the production problem.
(4) The invention adds the design of the visual camera, and ensures the accurate positioning of the source point when the center of the gamma source transilluminates.
(5) The design of the lengthening arm can lengthen the turbine supporting arm, thereby meeting the requirement of the center positioning of the welding lines such as large-diameter elbows, large heads and small heads.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to clearly understand the technical solutions of the present invention and to implement the technical solutions according to the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described 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 without creative efforts.
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of the angle change of the supporting arm driven by the worm wheel and worm structure according to the present invention.
Fig. 3 is a schematic diagram of the position of the additional visual camera in the present invention.
FIG. 4 is a schematic diagram of the position of a preposition source according to the present invention.
FIG. 5 is a schematic diagram of the position of a source according to the present invention.
FIG. 6 is a schematic diagram of a post-source location according to the present invention.
Fig. 7 is a schematic structural view of the present invention after the extension arm is provided.
FIG. 8 is a schematic view of the transillumination trend of the rear gamma source of the present invention.
FIG. 9 is a schematic view of the transillumination trend of the front gamma source of the present invention.
FIG. 10 is a schematic view of a post-gamma source positioning head according to the present invention.
FIG. 11 is a schematic view of a front gamma source positioning head according to the present invention.
Fig. 12 is a schematic view of the worm structure of the present invention.
FIG. 13 is a schematic view of the connection of the turbine of the present invention to the turbine support arm.
Fig. 14 is a schematic structural view of the scroll positioning protection mechanism of the present invention.
In the figure: 1. a front gamma source positioning head; 2. a roller; 3. a lengthening arm; 4. a turbine support arm; 5. a protective cover positioning ring; 6. a scroll bar protecting cover; 7. a scroll bar; 8. a gamma source positioning head is arranged at the rear; 9. a visual camera; 10. a gamma source drive cable fixing nut; 11. a gamma source channel; 12. turbine, 13, gamma point source; 14. a connecting mechanism; 15. and a limiting bulge.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the gamma source detection center positioning device for the butt joint of the metal pipeline shown in fig. 1-14 comprises a gamma source positioning mechanism, a turbine supporting mechanism, a scroll rod 7, a visual camera 9, a gamma source conveying and containing mechanism, a scroll rod positioning protection mechanism and a display mechanism; the scroll bar 7 is of a hollow structure; the gamma source positioning mechanism is fixedly connected with the front end surface of the scroll 7 or between the scroll 7 and the gamma source conveying and accommodating mechanism; the periphery of the scroll 7 is connected with a scroll positioning protection mechanism; the two groups of turbine supporting mechanisms are connected to two ends of the worm positioning and protecting mechanism and are meshed with the worm 7; the visual camera 9 is connected between the scroll bar 7 and the gamma source conveying and containing mechanism or any one of the two sets of turbine supporting mechanisms, and the visual camera 9 is in electric signal connection with a display mechanism arranged on the ground.
In actual use, when a pipeline welding seam formed by pipe fittings with reducer heads (reducing pipe fittings), elbows and the like needs to be detected, the pipeline is only provided with one inlet and outlet as shown in figures 8 and 9, in order to ensure that a gamma source point is positioned at the center of the pipeline, two groups of turbine supporting arms are required to be arranged at the positions of the straight pipe sections, so that supporting points on the two groups of turbine supporting arms are simultaneously abutted to the inner walls of the straight pipe sections, and the gamma source point can be positioned at the center of the pipeline. According to the position relation of the welding bead, the straight pipe section and the inlet and the outlet, the front end face of the worm 7 or the rear end face of the worm 7 is connected with the gamma source positioning mechanism.
When the gamma source detection device is applied specifically, firstly, the gamma source detection central positioning device of the butt joint of the metal pipeline connected with the gamma source positioning mechanism is put into the pipeline to be detected; the gamma source conveying and containing mechanism is adjusted to drive the worm 7 to move left and right, so that the turbine supporting mechanism is driven to change the angle and is propped against the inner wall of the pipeline to be detected, and then the gamma point source 13 is aligned to be over against the center position of a welding bead through the visual camera 9. When the gamma source positioning mechanism is connected to the front end of the worm as required, the gamma source reaches the point position of the gamma source positioning mechanism through the long through hole with the inner diameter of 8mm in the worm 7 by the gamma source conveying and containing mechanism. When a gamma source positioning mechanism needs to be arranged at the rear end of the worm, the gamma source positioning mechanism is connected between the rear end of the worm 7 and the gamma source conveying and containing mechanism, and the gamma source directly enters the rear gamma source positioning mechanism through the gamma source conveying and containing mechanism and reaches the rear gamma source positioning head point position, so that the point source is positioned at the central position of the pipeline to be detected.
In practical application, a middle gamma source positioning head can be connected to the worm 7, namely, when the front end turbine supporting mechanism inclines forwards and the rear end turbine supporting mechanism inclines backwards (as shown in fig. 5), the arrangement mode can be adopted. The middle gamma source positioning head adopted at the moment is a hollow cylinder, the center is a through long hole with the diameter of 8mm, only one end of the cylinder is open, and the outer side wall of the cylinder is provided with a thread connected with the rear end of the worm 7; after the middle-placed gamma source positioning head is connected with the worm 7, the distance between the plugging part at the front end of the middle-placed gamma source positioning head and the rear end port of the worm 7 is 1/2 of the length of the worm 7, so that the gamma point source 13 can be conveniently positioned.
The minimum turning radius of the invention is 1.5D, which can meet the ray detection of the welding joints of 90-degree elbows, large and small ends (reducing connecting pipes), tee joints and other pipe fittings with the minimum pipe diameter of phi 168mm multiplied by 23mm and above, and is particularly suitable for the detection of the welding joints of thick-wall process pipelines of hydrogenation units. By adopting the technical scheme of the invention, the purposes of keeping the source point at the central position of the pipeline welding line all the time and quickly focusing can be realized, and the central transillumination detection can be carried out on the welding line on the process pipeline (except the closed welding line and the interface area head-touching welding line) of the refining device. Therefore, the utilization rate and the detection efficiency of the gamma source are improved, the investment of personnel is reduced, the detection construction progress is guaranteed, and the detection quality is improved.
In a specific application, the placement position of the visual camera 9 can be selected according to requirements, as shown in fig. 3.
Example two:
according to the gamma source detection center positioning device for the butt joint of the metal pipelines shown in fig. 1-9, the difference from the first embodiment is that: each group of turbine supporting mechanisms comprises three supporting rods, and each supporting rod comprises a roller 2, a turbine supporting arm 4 and a turbine 12; the turbine supporting arm 4 is fixedly connected with the turbine 12, and the roller 2 is connected with the free end of the turbine supporting arm 4; the center of the turbine 12 is rotatably connected to the worm positioning and protecting mechanism and is meshed with the worm 7; the three support rods are uniformly distributed on the same circumference at intervals of 120 degrees.
When the device is actually used, the gamma source detection center positioning device of the butt joint of the metal pipeline, the position of which is determined and the gamma source positioning mechanism is connected, is put into the pipeline to be detected; the guide pipe drives the scroll 7 to rotate left and right by adjusting a gamma source channel 11 in the gamma source conveying and accommodating mechanism, so that the turbine supporting mechanism is driven to change the angle and supports against the inner wall of the pipeline to be detected, then the gamma point source 13 is aligned through the visual camera 9 to just face the center position of a welding bead, and then subsequent operation is carried out.
According to the technical scheme, the worm and the turbine are meshed, so that the point source is positioned at the center of the pipeline to be detected, and the method is simple and convenient.
Example three:
according to a gamma source detection center positioning device for a butt joint of a metal pipeline shown in fig. 1 and 7, the difference from the second embodiment is that: each supporting rod further comprises an elongated arm 3; the extension arm 3 is detachably connected between the roller 2 and the turbine supporting arm 4.
When in actual use, the arrangement of the lengthening arm 3 can lengthen the turbine supporting arm 4, thereby satisfying the central positioning of welding lines such as large-diameter elbows, large heads and small heads and effectively expanding the application range of the turbine supporting arm.
Example four:
according to the gamma source detection center positioning device for the butt joint of the metal pipelines shown in the figures 1-7 and 13, the difference from the second embodiment or the third embodiment is that: the turbine supporting arm 4 is fixedly connected with 1/4 of the diameter of the turbine 12; the upper portion of the turbine support arm 4 is provided with a plurality of connecting through holes, and the centers of the plurality of connecting through holes are collinear with the center of the turbine 12.
In practical use, the turbine supporting arm 4 and the turbine 12 are fixedly connected by adopting the technical scheme, so that the maximum angle change of the supporting arm is ensured for the minimum loss of the number of teeth on the turbine. The upper portion of turbine support arm 4 is provided with connect the via hole, not only conveniently with the connection of gyro wheel 2, conveniently lengthen the connection setting of arm 3 moreover.
Example five:
according to a gamma source detection center positioning device for a butt joint of a metal pipeline shown in fig. 1 and 14, the difference from the first embodiment is that: the scroll rod positioning protection mechanism comprises a protection cover positioning ring 5, a scroll rod protection cover 6 and a connecting mechanism 14; the protective cover positioning ring 5 is disc-shaped, a circular through hole is formed in the center of the protective cover positioning ring, the scroll protective cover 6 is hollow and cylindrical, the protective cover positioning rings 5 are connected to the end faces of the two ends of the scroll protective cover 6 respectively, and the central circular through hole of each protective cover positioning ring 5 is positioned at the corresponding end of the scroll 7; the peripheral side walls of the two ends of the scroll rod protective cover 6 are respectively provided with a connecting mechanism 14; the connecting mechanism 14 is composed of three groups of fixing pieces which are uniformly distributed on the same circumference at intervals of 120 degrees, each fixing piece is composed of two side plates which are arranged in parallel, positioning round holes are correspondingly formed in the two side plates, and the plate surfaces of the side plates are parallel to the axis of the scroll rod protective cover 6.
In actual use, scroll protection cover 6 is disposed on the outer periphery of scroll 7, and there is a gap between the inner side wall of scroll protection cover 6 and scroll 7. The central circular through hole of the protective cover positioning ring 5 is positioned in the annular positioning grooves at the two ends of the scroll rod 7, so that the scroll rod 7 can only rotate in the scroll rod protective cover 6 and cannot move up and down.
The arrangement of the scroll protective cover 6 ensures that the scroll 7 is not corroded by the influence of the outside, thereby effectively prolonging the service life of the scroll; the arrangement of the connecting mechanism 14 can conveniently and stably fixedly connect the turbine supporting mechanism, and the installation and maintenance are convenient.
Example six:
according to a gamma source detection center positioning device for a butt joint of a metal pipeline shown in fig. 1, the difference from the first embodiment is that: the display mechanism is a mobile phone; the visual camera 9 adopts a wide-angle visual camera.
When the mobile phone is actually used, the display mechanism adopts a mobile phone mode, so that the operation is more convenient and faster.
The visual camera 9 adopts a wide-angle visual camera, so that the visual field is wider, and the accuracy of positioning and placing the source point is higher.
In this embodiment, a cable is used to transmit signals between the mobile phone and the visual camera 9.
In particular use, the display mechanism may also be a display screen.
Example seven:
according to the gamma source detection center positioning device for the butt joint of the metal pipeline shown in fig. 1 and 12, the difference from the first embodiment is that: the scroll bar 7 adopts a three-head scroll bar; the periphery of the two ends of the worm rod 7 is provided with threads matched with the worm wheel 12, and the outer wall of the worm rod outside each thread is provided with an annular positioning groove for positioning a worm rod positioning protection mechanism; three connecting through holes are uniformly formed in the side wall of the end head at the rear end of the scroll 7; the inner side wall of the front end of the scroll rod 7 and the inner side wall of the rear end of the scroll rod are both provided with threads which are connected with the gamma source positioning mechanism in a matching mode.
In practical use, the scroll 7 adopts a three-head scroll, so that the positioning adjustment speed is faster. The inner side wall of the scroll 7 is provided with threads, so that the connection with the gamma source positioning mechanism is more convenient. The setting of annular positioning groove for safety cover position circle 5 among the scroll positioning protection mechanism is fixed a position wherein, ensures that scroll 7 can only rotate in scroll safety cover 6, and can not reciprocate. Three connecting through holes are formed in the side wall of the end head at the rear end of the scroll 7, so that the scroll can be conveniently connected with related equipment.
Example eight:
according to a gamma source detection center positioning device for a butt joint of a metal pipeline shown in fig. 1, the difference from the first embodiment is that: the gamma source conveying and accommodating mechanism comprises a gamma source channel 11, a gamma source driving cable fixing nut 10 and a gamma source conveying line; the front end of the gamma source channel 11 is connected with the rear end face of the scroll 7 through a gamma source drive cable fixing nut 10 or connected with a gamma source positioning mechanism connected on the rear end face of the scroll 7; the front end of the gamma source conveying line is connected with a gamma point source 13, and the gamma point source 13 is positioned in the gamma source positioning mechanism through the gamma source conveying line through the gamma source channel 11.
In practical use, the gamma point source 13 can meet the central transillumination of different pipe fitting forms in different ways of being arranged in a front-mounted or rear-mounted mode according to the change of the front and rear directions of the turbine supporting arms 4, the transillumination detection capability is obviously enhanced, and the middle-mounted gamma source positioning head is positioned between the two sets of turbine supporting mechanisms when necessary.
When the turbine support arms 4 in the two sets of turbine support mechanisms are inclined backwards in specific application, the gamma point source 13 can be positioned in the gamma source positioning mechanism arranged at the front end of the scroll 7, namely the preposed gamma source positioning head 1, as shown in fig. 4, and at this time, the front end of the gamma source channel 11 is connected with the rear end face of the scroll 7 through the gamma source drive cable fixing nut 10. When the turbine support arms 4 in the front-end turbine support mechanism are inclined forward and the turbine support arms 4 in the rear-end turbine support mechanism are inclined backward, the γ -point source 13 may be positioned between the two sets of turbine support mechanisms, as shown in fig. 5. When the turbine supporting arms 4 in the two sets of turbine supporting mechanisms incline forwards, the gamma source 13 can be positioned in the gamma source positioning mechanism, namely the rear gamma source positioning head 8, arranged at the rear end of the worm 7, as shown in fig. 6, and at the moment, the front end of the gamma source channel 11 is connected with the gamma source positioning mechanism, namely the rear gamma source positioning head 8, connected to the rear end face of the worm 7 through the gamma source driving cable fixing nut 10.
The gamma source channel 11 in this embodiment is a prior art source tube. The guide pipe is a steel wire sleeve with an inner bore diameter of 8mm, has flexibility and certain rigidity, and can be used as an upper channel and a lower channel of the gamma point source 13 and a tool for screwing the vortex rod 7.
Example nine:
according to the gamma source detection center positioning device for the butt joint of the metal pipelines shown in fig. 1, 10 and 11, the difference from the first embodiment is that: the gamma source positioning mechanism comprises a front gamma source positioning head 1 and a rear gamma source positioning head 8; the rear gamma source positioning head 8 is connected between the rear end of the scroll 7 and the gamma source conveying and accommodating mechanism; the prepositive gamma source positioning head 1 is a hollow cylinder with only one open end, and the periphery of the open end is provided with a thread which is matched and connected with the inner side wall of the front end of the scroll 7; the rear gamma source positioning head 8 is a hollow cylinder with an open end, the peripheries of two ends of the cylinder are both provided with threads, the outer diameter of the open end is larger than that of the other end, and annular limiting bulges 15 are respectively arranged at the joints of the threads at the two ends and the smooth surface of the cylinder.
In practical use, the front gamma source positioning head 1 or the rear gamma source positioning head 8 is adopted according to practical conditions. The front gamma source positioning head 1 and the rear gamma source positioning head 8 adopt the technical scheme, so that the connection is convenient, the gamma point source 13 can be ensured to smoothly pass through and be accurately positioned, and the radiation detection center transillumination center positioning of pipe fitting butt joints of industrial pipelines phi 168 and above, 90-degree elbows, reducer (reducing adapter pipes), tee joints and the like is facilitated.
Example ten:
a method for positioning a gamma source detection center positioning device of a butt joint of a metal pipeline comprises the following steps,
the method comprises the following steps: putting the multipurpose pipeline butt joint gamma source detection center positioning device into a pipeline to be detected;
step two: the gamma source channel 11 in the gamma source conveying and containing mechanism is adjusted to drive the worm 7 to rotate left and right, so that the turbines 12 are driven to rotate, each turbine supporting arm 4 in each group of turbine supporting mechanisms is subjected to angle change, the front ends of the turbine supporting arms 4 abut against the inner wall of the pipeline to be detected, and the gamma point source 13 is positioned at the central position of the pipeline to be detected;
step three: the gamma point source 13 is aligned to be opposite to the center position of the welding bead through the visual camera 9;
step four: the gamma point source 13 is introduced into the hollow space of the scroll 7 through the gamma source passage 11 and reaches a designated point.
By adopting the technical scheme, the worm-gear type worm gear support arm is small in overall size and flexible and convenient to use, and the worm gear are matched to conveniently drive the worm-gear support arm to lift; the pipeline radiographic inspection is realized conveniently and with high precision by the front-mounted source point, the middle-mounted source point and the rear-mounted source point which can be selectively positioned, the front and rear directions of the supporting arm which can be selected and the point position of the camera which can be changed.
In the case of no conflict, a person skilled in the art may combine the relevant technical features in the foregoing examples with each other according to an actual situation to achieve a corresponding technical effect, and details of various combining situations are not described herein again.
It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions relating to "first", "second", etc. in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
The foregoing is illustrative of the preferred embodiments of the present invention, and the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a metal pipeline butt joint gamma source detection center positioner which characterized in that: the device comprises a gamma source positioning mechanism, a turbine supporting mechanism, a scroll rod (7), a visual camera (9), a gamma source conveying and containing mechanism, a scroll rod positioning protection mechanism and a display mechanism; the scroll bar (7) is of a hollow structure; the gamma source positioning mechanism is fixedly connected to the front end surface of the scroll rod (7) or between the scroll rod (7) and the gamma source conveying and accommodating mechanism; the periphery of the scroll rod (7) is connected with a scroll rod positioning protection mechanism; the two groups of turbine supporting mechanisms are arranged, are connected to two ends of the worm positioning protection mechanism and are meshed with the worm (7); the visual camera (9) is connected between the scroll bar (7) and the gamma source conveying and containing mechanism or any one of the two turbine supporting mechanisms, and the visual camera (9) is in electric signal connection with a display mechanism arranged on the ground.
2. The gamma source detection center positioning device for the butt joint of the metal pipeline as claimed in claim 1, wherein: the gamma source positioning mechanism comprises a front gamma source positioning head (1) and a rear gamma source positioning head (8); the rear gamma source positioning head (8) is connected between the rear end of the scroll rod (7) and the gamma source conveying and accommodating mechanism; the prepositive gamma source positioning head (1) is a hollow cylinder with only one open end, and the periphery of the open end is provided with a thread which is matched and connected with the inner side wall of the front end of the scroll rod (7); the rear gamma source positioning head (8) is a hollow cylinder with one open end, the peripheries of the two ends of the cylinder are both provided with threads, the outer diameter of the open end is larger than that of the other end, and annular limiting bulges (15) are respectively arranged at the joints of the threads at the two ends and the smooth surface of the cylinder.
3. The gamma source detection center positioning device for the butt joint of the metal pipeline as claimed in claim 1, wherein: each group of turbine supporting mechanisms comprises three supporting rods, and each supporting rod comprises a roller (2), a turbine supporting arm (4) and a turbine (12); the turbine supporting arm (4) is fixedly connected with the turbine (12), and the roller (2) is connected to the free end of the turbine supporting arm (4); the center of the turbine (12) is rotatably connected to the worm rod positioning protection mechanism and is meshed with the worm (7); the three support rods are uniformly distributed on the same circumference at intervals of 120 degrees.
4. The gamma source detection center positioning device for the butt joint of the metal pipeline as claimed in claim 3, wherein: each supporting rod also comprises an elongated arm (3); the lengthening arm (3) is detachably connected between the roller (2) and the turbine supporting arm (4).
5. The gamma source detection center positioning device for the butt joint of the metal pipeline as claimed in claim 3 or 4, wherein: the turbine supporting arm (4) is fixedly connected with 1/4 of the diameter of the turbine (12); the upper part of the turbine supporting arm (4) is provided with a plurality of connecting through holes, and the centers of the connecting through holes are collinear with the center of the turbine (12).
6. The gamma source detection center positioning device for the butt joint of the metal pipeline as claimed in claim 1, wherein: the scroll rod positioning protection mechanism comprises a protection cover positioning ring (5), a scroll rod protection cover (6) and a connecting mechanism (14); the protective cover positioning ring (5) is disc-shaped, a circular through hole is formed in the center of the protective cover positioning ring, the scroll protective cover (6) is hollow and cylindrical, the end faces of the two ends of the scroll protective cover (6) are respectively connected with the protective cover positioning rings (5), and the central circular through hole of each protective cover positioning ring (5) is positioned at the corresponding end of the scroll rod (7); the peripheral side walls of the two ends of the scroll rod protective cover (6) are respectively provided with a connecting mechanism (14); coupling mechanism (14) be that 120 intervals evenly lay the mounting on same circumference by three groups and constitute, every mounting comprises two parallel arrangement's curb plate, the corresponding division has the location round hole on two curb plates, and the face of curb plate is parallel with the axis of scroll protection cover (6).
7. The gamma source detection center positioning device for the butt joint of the metal pipeline as claimed in claim 1, wherein: the display mechanism is a mobile phone; the visual camera (9) adopts a wide-angle visual camera.
8. The gamma source detection center positioning device for the butt joint of the metal pipeline as claimed in claim 1, wherein: the scroll bar (7) adopts a three-head scroll bar; the periphery of the two ends of the worm (7) is provided with threads matched with the worm wheel (12), and the outer wall of the worm outside each thread is provided with an annular positioning groove for positioning a worm positioning protection mechanism; three connecting through holes are uniformly formed in the side wall of the end head at the rear end of the scroll rod (7); the inner side wall of the front end of the scroll rod (7) and the inner side wall of the rear end of the scroll rod are both provided with threads which are connected with the gamma source positioning mechanism in a matching manner.
9. The gamma source detection center positioning device for the butt joint of the metal pipeline as claimed in claim 1, wherein: the gamma source conveying and accommodating mechanism comprises a gamma source channel (11), a gamma source driving cable fixing nut (10) and a gamma source conveying line; the front end of the gamma source channel (11) is connected with the rear end face of the scroll rod (7) through a gamma source drive cable fixing nut (10) or is connected with a gamma source positioning mechanism connected to the rear end face of the scroll rod (7); the front end of the gamma source conveying line is connected with a gamma point source (13), and the gamma point source (13) is positioned in the gamma source positioning mechanism through the gamma source conveying line through a gamma source channel (11).
10. The method for positioning the gamma source detection center positioning device of the butt joint of the metal pipeline as claimed in any one of claims 1 to 9, wherein: comprises the following steps of (a) carrying out,
the method comprises the following steps: putting the gamma source detection center positioning device of the butt joint of the metal pipeline into the pipeline to be detected;
step two: the gamma source channel (11) in the gamma source conveying and containing mechanism is adjusted to drive the worm rod (7) to rotate left and right, so that the turbines (12) are driven to rotate, each turbine supporting arm (4) in each group of turbine supporting mechanisms is subjected to angle change, and the front ends of the turbine supporting arms (4) abut against the inner wall of a pipeline to be detected;
step three: the gamma point source (13) is aligned to the center position of the welding bead through the visual camera (9);
step four: the gamma point source (13) is led into the hollow space of the vortex rod (7) through the gamma source channel (11) to reach the designated point.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211368615.0A CN115791843A (en) | 2022-11-03 | 2022-11-03 | Gamma source detection center positioning device and method for butt joint of metal pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211368615.0A CN115791843A (en) | 2022-11-03 | 2022-11-03 | Gamma source detection center positioning device and method for butt joint of metal pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116551271A (en) * | 2023-05-19 | 2023-08-08 | 塔里木大学 | Cotton planter earthing roller welding robot |
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- 2022-11-03 CN CN202211368615.0A patent/CN115791843A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116551271A (en) * | 2023-05-19 | 2023-08-08 | 塔里木大学 | Cotton planter earthing roller welding robot |
| CN116551271B (en) * | 2023-05-19 | 2023-11-07 | 塔里木大学 | Cotton planter earthing roller welding robot |
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