CN215596786U - Socket structure of tool for DR detection of long-distance pipeline - Google Patents

Abstract

The utility model relates to a socket joint structure of frock for long distance pipeline DR detects belongs to the field of pipeline detection technique, and it includes two sets of supporting mechanism that set up along pipeline axial interval, supporting mechanism slides along the pipeline axial, supporting mechanism forms the ring coaxial with the pipeline when two support semi-ring fixed connection including dismantling two support semi-rings of connection, coaxial rotation is connected with and bears the weight of the mechanism on the support semi-ring, and X ray emission pipe, battery and digital detector are installed on bearing the weight of the mechanism. This application has the convenience and installs the frock on the pipeline, reduces the effect of the installation degree of difficulty.

Description

Socket structure of tool for DR detection of long-distance pipeline

Technical Field

The application relates to the field of pipeline detection technology, in particular to a sleeving structure of a tool for DR detection of a long-distance pipeline.

Background

The long-distance pipeline refers to a long-distance pipeline which is used for conveying commodity media between production places, storage houses and use units, spans provinces and cities, and passes through or spans river roads, and is provided with a booster pump station in the middle. After the pipeline is used for a long time, the pipeline can generate the problems of rusting and the like, various defects and damages can be found in advance by detecting the pipeline, and the accidents can be effectively prevented and reduced.

Among the correlation technique, chinese utility model patent that the publication number of granting is CN213302049U discloses a long defeated pipeline DR detects uses frock, and it includes that two support rings on the pipeline are located to the coaxial cover, through dead lever fixed connection between two support rings, rotates on the dead lever and is connected with the change, change and the coaxial setting of pipeline, change and pipeline emergence relative rotation, change the inner wall and be provided with the X ray emission tube and the digital detector that are used for detecting. Locate the pipeline with support ring and swivel cover on, the support ring rotates and carries out 360 degrees detections to the pipeline lateral wall, and the support ring slides and promotes X ray emission pipe and digital detector through dead lever and swivel to slide, thereby detect the pipeline lateral wall.

In view of the above-mentioned related technologies, the inventor believes that it is very inconvenient to disassemble one end of the pipeline and then sleeve the tool on the pipeline during installation.

SUMMERY OF THE UTILITY MODEL

In order to conveniently install the frock on the pipeline, reduce the installation degree of difficulty, this application provides a socket joint structure of frock for long distance pipeline DR detects.

The application provides a socket joint structure of frock for long distance pipeline DR detects adopts following technical scheme:

the utility model provides a socket joint structure of frock for long distance pipeline DR detects, includes two sets of supporting mechanism that set up along pipeline axial interval, supporting mechanism slides along the pipeline axial, supporting mechanism includes two support semi-rings that can dismantle the connection, forms the ring coaxial with the pipeline when two support semi-rings fixed connection, the coaxial rotation is connected with bearing mechanism on the support semi-ring, and X ray emission pipe, battery and digital detector are installed on bearing mechanism.

By adopting the technical scheme, the pipeline is positioned between the two support semi-rings by moving the support semi-rings, the support semi-rings are rotated and fixed to form a ring which is coaxially arranged with the pipeline, the bearing mechanism is rotated, and the X-ray emission tube and the digital detector rotate along with the rotation of the support semi-rings, so that the peripheral side wall of the pipeline is detected, and the operation is simple and convenient.

Optionally, one end of each support half ring is hinged to the adjacent end of the adjacent support half ring, and the other end of each support half ring is detachably connected to the adjacent end of the adjacent support half ring.

Through adopting above-mentioned technical scheme, only need during the installation to place the support semi-ring on the pipeline, support the semi-ring through rotating and make two support semi-rings form the ring, support two semi-rings again and fix and can cup joint on the pipeline, easy operation is convenient.

Optionally, the two support half rings are detachably connected through a fixing assembly, the fixing assembly comprises a fixing block fixedly connected to the outer side wall of each support half ring, and the fixing blocks on the two support half rings are detachably connected through bolts.

Through adopting above-mentioned technical scheme, when the installation supports the semi-ring, rotate to support the semi-ring and make two support semi-rings form the ring coaxial with the pipeline, rethread bolt is fixed with two fixed blocks to accomplish the installation, easy operation is convenient.

Optionally, when the two support semi-rings form a ring, the fixed blocks on the support semi-rings abut against the adjacent fixed blocks, the fixed blocks are fixedly connected with convex blocks towards one sides of the adjacent fixed blocks, and the convex blocks are clamped with the adjacent fixed blocks.

Through adopting above-mentioned technical scheme, when the installation supports the semi-ring, make lug and adjacent fixed block joint earlier to play the prepositioning effect, and then facilitate the use bolt and connect adjacent fixed block, effectively reduce the installation degree of difficulty.

Optionally, the bearing mechanism includes bearing cylinders coaxially disposed with the support half rings, end faces of the bearing cylinders are semicircular, the bearing cylinders are two, the two bearing cylinders are detachably connected, when the two bearing cylinders are fixed, the two bearing cylinders form a cylinder coaxial with the pipeline, the cylinder and the support half rings can rotate coaxially relative to each other, the X-ray emission tube and the storage battery are fixedly connected to an inner side wall of one of the bearing cylinders, and the digital detector is fixedly connected to an inner side wall of the other bearing cylinder.

Through adopting above-mentioned technical scheme, two fixed drum that form and the pipeline is coaxial of bearing the weight of the section of thick bamboo, rotate the drum that two bearing the weight of the section of thick bamboo formed to detect pipeline week lateral wall, easy operation is convenient.

Optionally, the two groups of supporting mechanisms are connected through a connecting mechanism, the connecting mechanism comprises a connecting rod, the length direction of the connecting rod is parallel to the axial direction of the pipeline, one side of each supporting semi-ring, facing the other group of supporting mechanisms, of the supporting semi-ring is fixedly connected with a plurality of connecting rods, and the connecting rods connect the supporting semi-rings of the two groups of supporting mechanisms.

Through adopting above-mentioned technical scheme, connect two sets of supporting mechanism through the connecting rod to conveniently install two sets of supporting mechanism simultaneously, improve installation stability and cheap nature.

Optionally, the bearing cylinder periphery lateral wall has seted up the spout along bearing cylinder circumference, and when two bearing cylinders were fixed, the spout on two bearing cylinders was connected and is become the annular, connecting rod lateral wall fixedly connected with slider, slider sliding connection is in the annular.

Through adopting above-mentioned technical scheme, the bearing cylinder passes through the slider spout and is connected with the connecting rod, and after two bearing cylinders are fixed, rotate the drum that two bearing cylinders formed, the slider slides in the annular to improve the stability that the bearing cylinder rotated the in-process.

Optionally, the supporting half ring is provided with a plurality of groups of abutting mechanisms, each abutting mechanism comprises a guide assembly which slides along the axial direction of the supporting half ring, each guide assembly is fixedly connected with an abutting plate towards one end of the pipeline, each supporting half ring is provided with a driving assembly which drives the corresponding guide assembly to slide, and a plurality of groups of abutting mechanisms on the same group of supporting mechanisms are circumferentially arranged by taking the pipeline axis as the circle center.

Through adopting above-mentioned technical scheme, drive assembly drive direction subassembly slides to make direction subassembly promote ground fishplate bar and pipeline lateral wall butt, and then realize that supporting mechanism and pipeline are coaxial to be set up easy operation convenience.

In summary, the present application includes at least one of the following beneficial technical effects:

1. during installation, the two bearing cylinders are fixedly connected and sleeved on the pipeline, the two support semi-rings of the same group of support mechanisms are fixedly arranged coaxially with the pipeline, and the support mechanisms are arranged coaxially with the pipeline through the abutting mechanisms, so that the installation difficulty of the tool is effectively reduced;

2. when the support semi-ring rotates, the bearing cylinder is driven to rotate through the connecting rod and the sliding block sliding groove, so that the support mechanism, the pipeline and the bearing mechanism are coaxially arranged, the bearing mechanism and the support mechanism can rotate relatively, and after the support mechanism is connected with the pipeline, the bearing mechanism is rotated to detect the peripheral side wall of the pipeline;

3. the multiple groups of abutting mechanisms play a role in positioning and supporting the supporting mechanism, so that the supporting mechanism and the pipeline are coaxially arranged, and the bearing mechanism is convenient to detect the peripheral side wall of the pipeline.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic view of a portion of the structure of the embodiment of the present application, which is mainly used for showing the supporting mechanism;

FIG. 3 is a partial schematic structural view of an embodiment of the present application, which is mainly used for showing a carrying mechanism;

FIG. 4 is a schematic cross-sectional view of a portion of the structure of an embodiment of the present application, mainly illustrating a fixing assembly;

FIG. 5 is a schematic cross-sectional view of a portion of the structure of an embodiment of the present application, mainly illustrating a glide assembly;

FIG. 6 is a schematic view, partly in section, of an embodiment of the present application, and is primarily intended to show a locking assembly;

FIG. 7 is an enlarged, fragmentary view of portion A of FIG. 6, shown primarily for the purpose of illustrating the locking assembly;

FIG. 8 is an enlarged partial view of portion B of FIG. 6, shown primarily for the purpose of illustrating the locking assembly;

fig. 9 is a partially enlarged schematic view of a portion C in fig. 4, which is mainly used for showing the driving assembly.

Description of reference numerals: 1. a pipeline; 2. a support mechanism; 21. a support half ring; 211. a third through hole; 22. a fixing assembly; 221. a fixed block; 222. a bump; 223. a groove; 3. an abutting mechanism; 31. a guide assembly; 311. a guide bar; 312. a connecting plate; 32. a butt joint plate; 33. a drive assembly; 331. connecting blocks; 332. a rotating groove; 333. rotating the ring groove; 334. a drive rod; 335. a connecting ring; 336. a fourth via hole; 4. a connecting rod; 5. a carrying mechanism; 51. a carrying cylinder; 511. a first through hole; 512. connecting grooves; 513. a locking groove; 514. a second through hole; 52. a slipping component; 521. a slider; 522. a chute; 53. a locking assembly; 531. a locking lever; 532. a limiting plate; 533. penetrating the rod; 534. a fixing plate; 6. an X-ray emitting tube; 7. a digital detector; 8. and (4) a storage battery.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses socket joint structure of long distance pipeline DR detects with frock. Referring to fig. 1 and 2, a socket joint structure of a long distance pipeline DR detects and uses frock includes that two sets of coaxial covers locate pipeline 1 on supporting mechanism 2, supporting mechanism 2 passes through butt mechanism 3 and the coaxial setting of 1 lateral wall of pipeline, is connected with through the coaxial rotation of coupling mechanism between two sets of supporting mechanism 2 and bears mechanism 5.

Referring to fig. 1 and 3, an X-ray emission tube 6, a digital detector 7, and a storage battery 8 are mounted on the carrier mechanism 5.

Through locating supporting mechanism 2 and carrier 5 cover on pipeline 1, carrier 5 rotates and drives X ray emission tube 6 and digital detector 7 and rotate to detect pipeline 1 week lateral wall.

Referring to fig. 1, the supporting mechanism 2 includes two supporting half rings 21, the supporting half rings 21 are semi-circular, one end of each supporting half ring 21 is hinged to one end of an adjacent supporting half ring 21, the other end of each supporting half ring 21 is connected to the other end of the adjacent supporting half ring 21 through a fixing component 22, and the two supporting half rings 21 form a circular ring coaxial with the pipeline 1. The support half rings 21 are placed on the pipeline 1, and the support half rings 21 are rotated to make the two support half rings 21 abut against each other, thereby forming a ring for sleeving the pipeline 1.

Referring to fig. 2 and 4, the fixing assembly 22 includes fixing blocks 221 fixedly connected to outer sidewalls of the support half rings 21, and when the two support half rings 21 are abutted to form a circular ring, the two fixing blocks 221 are abutted and connected by bolts. One fixing block 221 is fixedly connected with a bump 222 towards one side of the adjacent fixing block 221, the other fixing block 221 is provided with a groove 223 towards one side of the bump 222, the bump 222 is clamped in the groove 223, and a bolt penetrates through the bump 222 and the two fixing blocks 221. The two fixing blocks 221 are pre-fixed by the protrusions 222 and the grooves 223, and then the two fixing blocks 221 are connected by bolts, thereby fixing the two support half rings 21.

Referring to fig. 2, the connecting mechanism includes connecting rods 4 connecting the two sets of supporting mechanisms 2, the connecting rods 4 are round rods, the axial direction of the connecting rods 4 is parallel to the axial direction of the supporting rings, the connecting rods 4 are fixedly connected to one side of the supporting half ring 21, which faces the other set of supporting mechanism 2, of the supporting half ring 21, two connecting rods 4 are fixedly connected to each supporting half ring 21, and the four connecting rods 4 are circumferentially arranged with the axis of the pipeline 1 as the center of a circle.

Referring to fig. 3, the bearing mechanism 5 includes two bearing cylinders 51 coaxially disposed with the support half ring 21, the end surfaces of the bearing cylinders 51 are semi-circular, the connecting rod 4 is detachably connected with the outer side wall of the bearing cylinder 51 through a sliding assembly 52, and when the two bearing cylinders 51 abut against each other, the two bearing cylinders 51 form a cylinder coaxially disposed with the pipeline 1 through a locking assembly 53.

Referring to fig. 2 and 3, the X-ray emission tube 6 and the storage battery 8 are fixedly connected to the inner side wall of one of the bearing cylinders 51, the digital detector 7 is fixedly connected to the inner side wall of the other bearing cylinder 51, and the X-ray emission tube 6 and the digital detector 7 are positioned on the same radial straight line of the pipeline 1. Support semi-ring 21 and drive bearing cylinder 51 through connecting rod 4 and rotate when rotating to make two bearing cylinders 51 form the drum with the coaxial cup joint of pipeline 1, bearing cylinder 51 rotates and drives X ray emission tube 6 and digital detector 7 and rotate, thereby detect pipeline 1 lateral wall circumference.

Referring to fig. 3 and 5, the sliding assembly 52 includes a plurality of T-shaped sliding blocks 521 fixedly connected to the connecting rod 4, in this embodiment, three sliding blocks 521 are provided at intervals along the axial direction of the connecting rod 4, T-shaped sliding grooves 522 are provided on the outer side wall of the bearing cylinder 51 in the circumferential direction, the number of the sliding grooves 522 is three corresponding to the number of the sliding blocks 521, and the sliding blocks 521 are slidably connected in the sliding grooves 522. When the two receiving cylinders are abutted, the sliding grooves 522 on the receiving cylinders are connected to form an annular groove. In the rotation process of the bearing cylinder, the sliding block 521 slides in the annular groove, so that the stability of the bearing cylinder in the rotation process is improved.

Referring to fig. 5 and 6, the locking assembly 53 includes a locking lever 531, one side of the bearing drum 51 facing the adjacent bearing drum 51 is provided with a connecting groove 512 along the axial direction of the bearing drum 51, when two bearing drums 51 abut against each other, the adjacent two connecting grooves 512 form a locking groove 513, and the locking lever 531 slides into the locking groove 513.

Referring to fig. 6 and 7, one end of the locking lever 531 is fixedly connected with a limiting plate 532, the limiting plate 532 is perpendicular to the length direction of the locking lever 531, two penetrating rods 533 are fixedly connected to the limiting plate 532 towards one end of the locking lever 531, each penetrating rod 533 corresponds to one bearing cylinder 51, a first through hole 511 for the penetrating rod 533 to pass through is formed in the bearing cylinder 51, and one end of the penetrating rod 533, which is far away from the limiting plate 532, passes through the first through hole 511.

Referring to fig. 6 and 8, a fixing plate 534 is fixedly connected to one side of the locking rod 531, which is away from the limiting plate 532, through a bolt, a second through hole 514 through which the through rod 533 passes is formed in the fixing plate 534, and one end of the through rod 533, which is away from the limiting plate 532, passes through the second through hole 514. When the stopper plate 532 abuts one end of the carriage cylinder 51, the fixing plate 534 abuts the other end of the carriage cylinder 51. After the two bearing barrels are abutted, the locking rod 531 slides into the locking groove 513, one end of the through rod 533 penetrates through the first through hole 511, the fixing plate 534 and the locking rod 531 are fixed through the bolts, and the fixing plate 534 connects one ends of the two through rods 533, which are far away from the limiting plate 532, so that the two bearing barrels 51 are connected into a whole.

Referring to fig. 2 and 4, the abutting mechanism 3 includes a guide assembly 31 connected to the support half ring 21 in a sliding manner along the radial direction of the support half ring 21, an abutting plate 32 is fixedly connected to one end of the guide assembly 31 facing the pipeline 1, the abutting plate 32 is an arc plate coaxially arranged with the pipeline 1, and a driving assembly 33 for driving the guide assembly 31 to slide is arranged on the support half ring 21. Each supporting half ring 21 is provided with two groups of abutting mechanisms 3, and the four groups of abutting mechanisms 3 on the same group of supporting mechanisms 2 are circumferentially arranged by taking the axis of the pipeline 1 as the circle center. The driving assembly 33 drives the guiding assembly 31 to push the abutting plate 32 to slide, after the abutting plate 32 abuts against the outer wall of the pipeline 1, the eight groups of abutting mechanisms 3 on the two groups of supporting mechanisms 2 sleeve the supporting mechanisms 2 and the bearing mechanisms 5 on the pipeline 1.

Referring to fig. 4, the guiding assembly 31 includes two guiding rods 311 fixedly connected to one side of the abutting plate 32 away from the pipeline 1, the guiding rods 311 are square rods, the length direction of the guiding rods 311 is radially parallel to the supporting half ring 21, a third through hole 211 for the guiding rods 311 to pass through is formed in the supporting half ring 21, one end of the guiding rod 311 away from the abutting plate 32 is fixedly connected with a connecting plate 312, and the connecting plate 312 connects the two guiding rods 311. The guide rod 311 is provided with scales along the length direction of the guide rod 311, and the sliding length of the guide rod 311 close to the pipeline 1 can be observed according to the scales.

Referring to fig. 4 and 9, the driving assembly 33 includes a driving rod 334 screwed to the support half-ring 21, the driving rod 334 is axially parallel to the length direction of the guide rods 311, and the driving rod 334 is located between the two guide rods 311. The abutting plate 32 is fixedly connected with a connecting block 331 towards one end of the guide rods 311, and the connecting block 331 is located between the two guide rods 311 and is fixedly connected with the two guide rods 311. The connecting block 331 deviates from the abutting plate 32 and is provided with a cylindrical rotating groove 332, the driving rod 334 is coaxially and rotatably connected in the rotating groove 332 towards one end of the abutting plate 32, a rotating ring groove 333 is coaxially formed in the side wall of the rotating groove 332, the driving rod 334 is coaxially and fixedly connected with a connecting ring 335 towards one end of the abutting plate 32, and the connecting ring 335 is rotatably connected in the rotating ring groove 333. A fourth through hole 336 is formed in the connecting plate 312 for the driving rod 334 to pass through, and one end of the driving rod 334, which is far away from the abutting rod, passes through the fourth through hole 336. The driving lever 334 is rotated to push the abutting plate 32 to slide through the connecting block 331, and the guide lever 311 guides the sliding of the abutting plate 32 in the process.

The implementation principle of the sleeving structure of the tool for DR detection of the long-distance pipeline in the embodiment of the application is as follows: the supporting half rings 21 and the receiving cylinder are placed on the pipeline 1, the supporting half rings 21 are rotated to enable the two supporting half rings 21 of the same group of supporting mechanisms 2 to be abutted, the convex blocks 222 on the fixing blocks 221 enter the grooves 223 on the adjacent fixing blocks 221, and the two abutted fixing blocks 221 are connected through bolts. After two adjacent bearing barrels 51 abut, the locking rod 531 penetrates into the locking groove 513, the penetrating rod 533 penetrates into the first through hole 511, the locking rod 531 and the penetrating rod 533 penetrate through the bearing barrels, the fixing plate 534 is connected with the locking rod 531 through the bolt, and the two penetrating rods 533 are far away from one end of the limiting plate 532, penetrate through the second through hole 514 and are connected into a whole through the fixing plate 534, so that the two bearing barrels are connected into a whole.

The driving rod 334 is rotated, the driving rod 334 rotates and slides to push the abutting plate 32 to slide through the connecting block 331, the abutting plate 32 slides towards the direction close to the pipeline 1 under the guiding action of the guide rod 311, after the abutting plate 32 abuts against the outer wall of the pipeline 1, the driving rod 334 stops rotating, the supporting half ring 21 is adjusted to enable the supporting half ring 21 to be coaxial with the pipeline 1, and the circumferential side wall of the pipeline 1 can be detected by rotating the bearing cylinder 51. The supporting half ring 21 is pushed to slide to drive the bearing cylinder 51 to slide, so that different positions of the pipeline 1 can be detected.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a socket joint structure of frock for long distance pipeline DR detects which characterized in that: including two sets of supporting mechanism (2) that set up along pipeline (1) axial interval, supporting mechanism (2) slide along pipeline (1) axial, supporting mechanism (2) including two support semi-rings (21) that can dismantle the connection, form the ring coaxial with pipeline (1) when two support semi-rings (21) fixed connection, support on semi-ring (21) coaxial rotation be connected with and bear mechanism (5), and X ray emission pipe (6X), battery (8) and digital detector (7) are installed on bearing mechanism (5).

2. The sleeving structure of the tool for DR detection of the long-distance pipeline according to claim 1, wherein: one end of each support semi-ring (21) is hinged to the adjacent end of the adjacent support semi-ring (21), and the other end of each support semi-ring (21) is detachably connected with the adjacent end of the adjacent support semi-ring (21).

3. The sleeving structure of the tool for DR detection of the long-distance pipeline according to claim 2, wherein: the two support semi-rings (21) are detachably connected through a fixing component (22), the fixing component (22) comprises a fixing block (221) fixedly connected to the outer side wall of each support semi-ring (21), and the fixing blocks (221) on the two support semi-rings (21) are detachably connected through bolts.

4. The sleeving structure of the tool for DR detection of the long-distance pipeline according to claim 2, wherein: when the two support semi-rings (21) form a circular ring, the fixed blocks (221) on the support semi-rings (21) are abutted to the adjacent fixed blocks (221), one sides of the fixed blocks (221) facing the adjacent fixed blocks (221) are fixedly connected with the convex blocks (222), and the convex blocks (222) are clamped with the adjacent fixed blocks (221).

5. The sleeving structure of the tool for DR detection of the long-distance pipeline according to claim 3, wherein: the bearing mechanism (5) comprises bearing barrels (51) which are coaxial with the supporting half rings (21), the end faces of the bearing barrels (51) are semicircular, the bearing barrels (51) are arranged in two, the two bearing barrels (51) are detachably connected, when the two bearing barrels (51) are fixed, the two bearing barrels (51) form a cylinder which is coaxial with the pipeline (1), the cylinder and the supporting half rings (21) can rotate coaxially relative to each other, the X-ray emission tube (6X) and the storage battery (8) are fixedly connected to the inner side wall of one bearing barrel (51), and the digital detector (7) is fixedly connected to the inner side wall of the other bearing barrel (51).

6. The sleeving structure of the tool for DR detection of the long-distance pipeline according to claim 5, wherein: two sets of supporting mechanism (2) are connected through coupling mechanism, coupling mechanism includes connecting rod (4), connecting rod (4) length direction and pipeline (1) axial direction are parallel, support semi-ring (21) and all fixedly connected with a plurality of connecting rods (4) towards support semi-ring (21) one side of another set of supporting mechanism (2), connecting rod (4) are connected support semi-ring (21) of two sets of supporting mechanism (2).

7. The sleeving structure of the tool for DR detection of the long-distance pipeline according to claim 6, wherein: bear a weight of section of thick bamboo (51) periphery lateral wall and seted up spout (522) along bearing a weight of section of thick bamboo (51) circumference, when two bearing a weight of section of thick bamboo (51) are fixed, spout (522) on two bearing a weight of section of thick bamboo (51) are connected and are become the annular, connecting rod (4) lateral wall fixedly connected with slider (521), slider (521) sliding connection is in the annular.

8. The sleeving structure of the tool for DR detection of the long-distance pipeline according to claim 1, wherein: support and be provided with a plurality of butt mechanisms (3) of group on semi-ring (21), butt mechanism (3) are including along supporting guide assembly (31) that semi-ring (21) axial slided, guide assembly (31) are towards pipeline (1) one end fixedly connected with butt board (32), be provided with drive assembly (33) that drive guide assembly (31) slided on supporting semi-ring (21), and multiunit butt mechanism (3) use pipeline (1) axis to set up as centre of a circle circumference on the same group of supporting mechanism (2).

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