CN113834473A - Auxiliary centering support - Google Patents
Auxiliary centering support Download PDFInfo
- Publication number
- CN113834473A CN113834473A CN202010581746.1A CN202010581746A CN113834473A CN 113834473 A CN113834473 A CN 113834473A CN 202010581746 A CN202010581746 A CN 202010581746A CN 113834473 A CN113834473 A CN 113834473A
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- support frame
- shaft
- centering
- lower support
- connecting plate
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- 230000007704 transition Effects 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 description 20
- 238000010168 coupling process Methods 0.000 description 11
- 238000005859 coupling reaction Methods 0.000 description 11
- 230000008878 coupling Effects 0.000 description 10
- 238000009434 installation Methods 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/002—Active optical surveying means
- G01C15/004—Reference lines, planes or sectors
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention provides an auxiliary centering support which comprises an upper support frame and a lower support frame, wherein the upper support frame is used for mounting a laser centering instrument, the lower support frame is matched with the upper support frame, two ends of the upper support frame and two ends of the lower support frame are connected through adjusting devices, follow-up bearings matched with a shaft to be measured are oppositely arranged on the inner surfaces of the upper support frame and the lower support frame, at least two follow-up bearings are respectively and rotatably arranged on the upper support frame and the lower support frame, and the central lines of the follow-up bearings are parallel to the axis of the shaft to be measured. The clamping degree of the upper and lower support frames is adjusted through the matching of the upper support frame, the lower support frame and the adjusting device, so that the upper and lower support frames can be stably fixed on a shaft to be measured, and the stable reading of the laser centering instrument is ensured; the servo bearings arranged on the inner surfaces of the upper support frame and the lower support frame can assist the upper support frame and the lower support frame to rotate on the shaft to be measured so as to simulate the rotation of the shaft to be measured, obtain the centering deviation of the shaft to be measured and the motor shaft and further ensure the centering precision of the two shafts.
Description
Technical Field
The invention belongs to the technical field of centering, and particularly relates to an auxiliary centering support for assisting in acquiring centering deviation between an input shaft and a motor shaft of a speed reducer which cannot be turned or is difficult to turn.
Background
In the installation project of the motor and the speed reducer, a laser centering instrument is often used for replacing a dial indicator to center two half couplings which are respectively installed on a motor shaft and an input shaft of the speed reducer so as to realize the centering of the motor shaft and the input shaft of the speed reducer, and the centering of the two half couplings is to ensure that the two half couplings are concentric and parallel in practice. And the transmitting end/receiving end of the laser centering instrument is generally arranged on the half coupling in a magnetic fixing or chain fixing mode. To the shaft coupling of making like non-magnetic adsorption nature materials such as stainless steel, the magnetic support can't be fixed on the flange terminal surface of this shaft coupling to unable installation laser centering appearance, and chain formula support is only when two semi-couplings centering of synchronous revolution advantage obvious: but in the actual use process, the following are found: some speed reducer input shafts have the situation of inconvenient rotation or difficult rotation (namely, the speed reducer input shafts cannot be turned or turned difficultly), the existing magnetic sliding supports cannot be installed on the non-magnetic adsorption half couplers to simulate the rotation of the half couplers, and the exposed input shafts between the speed reducer and the corresponding half couplers are short, so that the installation space of the laser centering instrument is limited, and the existing laser centering instrument fixing support cannot be used for installation.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide an auxiliary centering bracket for assisting in acquiring a centering deviation between an input shaft and a motor shaft of a speed reducer that cannot be turned or is difficult to turn, ensuring a centering accuracy between the input shaft and the motor shaft of the speed reducer, and prolonging a service life of a device.
In order to achieve the above and other related objects, the invention provides an auxiliary centering support, which comprises an upper support frame for mounting a laser centering instrument and a lower support frame matched with the upper support frame, wherein two ends of the upper support frame and the lower support frame are connected through an adjusting device, the inner surfaces of the upper support frame and the lower support frame are relatively provided with follow-up bearings matched with a shaft to be measured, the upper support frame and the lower support frame are respectively and rotatably provided with at least two follow-up bearings, and the central lines of the follow-up bearings are parallel to the axis of the shaft to be measured. The clamping degree of the upper and lower support frames is adjusted through the matching of the upper support frame, the lower support frame and the adjusting device, so that the upper and lower support frames can be stably fixed on a shaft to be measured, which cannot be turned, and the stable reading of the laser centering instrument is ensured; the servo bearings arranged on the inner surfaces of the upper support frame and the lower support frame can effectively assist the upper support frame and the lower support frame to rotate on the shaft to be measured so as to simulate the rotation of the shaft to be measured, obtain the centering deviation of the shaft to be measured and the motor shaft and further ensure the centering precision of the shaft to be measured and the motor shaft.
Furthermore, the upper support frame comprises a top plate, two ends of the inner surface of the top plate are respectively provided with an upper connecting plate, and the connecting transition part of the top plate and the two upper connecting plates is respectively provided with an upper bearing seat; the lower support frame comprises a bottom plate, the two ends of the inner surface of the bottom plate are respectively provided with a lower connecting plate, the connecting transition part of the bottom plate and the two lower connecting plates is respectively provided with a lower bearing seat, the follow-up bearings are arranged in the upper bearing seat and the lower bearing seat, and the four follow-up bearings are used for clamping the device on a shaft to be measured, which cannot be turned, so that the rotation of the device on the shaft to be measured is simulated, and the centering precision of the shaft to be measured and a motor shaft is ensured.
Furthermore, an upper clamping groove is formed in the outer end of the upper connecting plate, the upper clamping groove penetrates through the top surface and the bottom surface of the upper connecting plate, a lower clamping groove is formed in the outer end of the lower connecting plate, the lower clamping groove penetrates through the top surface and the bottom surface of the lower connecting plate, a through hole is further formed in the side wall of the lower clamping groove, a positioning pin is arranged in the through hole, and a positioning hole is formed in the positioning pin; the adjusting device comprises an adjusting screw rod and an adjusting nut, the lower end of the adjusting screw rod is fixed in the positioning hole, the upper end of the adjusting screw rod penetrates through the corresponding upper clamping groove to be connected with the adjusting nut, and the distance between the upper support frame and the lower support frame is adjusted through the adjusting screw rod and the adjusting nut, so that the adjusting device can be stably fixed on a shaft to be measured, which cannot be turned, and the centering precision is ensured.
The positioning pin is further provided with a limiting hole, the limiting hole is communicated with the positioning hole, the central line of the limiting hole is perpendicular to the central line of the positioning hole, and a limiting rod used for fixing the adjusting screw rod is further arranged in the limiting hole so that the lower portion of the adjusting screw rod can be fixed on the positioning pin.
Furthermore, the outer ends of the upper connecting plate and the lower connecting plate are oppositely provided with mounting holes, the adjusting device comprises an adjusting bolt and an adjusting nut, the adjusting bolt penetrates through the mounting holes of the upper connecting plate and the corresponding mounting holes on the lower connecting plate to be connected with the adjusting nut, and the distance between the upper support frame and the lower support frame is adjusted, so that the device can be stably fixed on a shaft to be measured, which cannot be turned, and the centering precision is ensured.
Furthermore, the thickness of the upper support frame and the thickness of the lower support frame are not more than 25mm, so that the invention can be used in a narrow space (namely, the invention can be used on an exposed input shaft between the speed reducer and the half coupling).
Furthermore, the upper surface of the upper support frame is provided with two guide rods at intervals for installing the transmitting end or the receiving end of the laser centering instrument so as to install the transmitting end or the receiving end of the laser centering instrument and obtain the centering deviation value.
As described above, the auxiliary centering bracket of the present invention has the following beneficial effects:
according to the auxiliary centering support, the follow-up bearings are arranged on the inner surfaces of the upper support frame and the lower support frame, so that the follow-up bearings are tangent to a shaft to be measured, which cannot be turned, and the upper support frame and the lower support frame can be effectively assisted to rotate on the shaft to be measured so as to simulate the rotation of the shaft to be measured, and the centering deviation of the shaft to be measured and a motor shaft can be conveniently obtained; the adjusting devices arranged at the two ends of the upper and lower support frames can adjust the distance between the upper and lower support frames so as to adjust the distance between the follow-up bearings on the upper and lower support frames, and the four follow-up bearings enable the laser centering device to be stably installed on a shaft to be measured, thereby ensuring the stable reading of the laser centering device; in addition, the thickness of upper bracket and bottom suspension strut does not all exceed 25mm, can satisfy the installation use of laser centering appearance in the narrow and small space, has the commonality.
Drawings
Fig. 1 is a perspective view of the auxiliary centering bracket of the present invention mounted on a shaft to be measured.
Fig. 2 is a left side view of the auxiliary centering bracket of the present invention mounted on the shaft to be measured.
Fig. 3 is a schematic structural view of the upper and lower support frames in cooperation with each other in the present invention.
Fig. 4 is a perspective view of the upper support frame in the present invention.
Fig. 5 is a perspective view of the lower support frame of the present invention.
Fig. 6 is a perspective view of a locating pin of the present invention.
Fig. 7 is a perspective view of a roll shaft in the present invention.
Description of the reference numerals
The device comprises an upper support frame 1, a top plate 11, an upper connecting plate 12, an upper clamping groove 12a, an upper bearing seat 13, an upper bearing seat mounting hole 13a, a lower support frame 2, a bottom plate 21, a lower connecting plate 22, a lower clamping groove 22a, a through hole 22b, a lower bearing seat 23, a lower bearing seat mounting hole 23a, a follow-up bearing 3, a rolling shaft 31, an adjusting device 4, an adjusting screw rod 41, an adjusting nut 42, a positioning pin 43, a positioning hole 43a, a limiting hole 43b, a guide rod 5, a shaft 6 to be measured and a half coupling 7.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 7. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1 to 7, an auxiliary centering bracket of the present invention is used for assisting in acquiring a centering deviation between an input shaft and a motor shaft of a speed reducer that cannot be turned or is difficult to turn, and includes an upper bracket 1 for mounting a laser centering instrument and a lower bracket 2 matched with the upper bracket 1, in this embodiment, the thicknesses of the upper bracket 1 and the lower bracket 2 do not exceed 25mm, so as to meet the mounting requirement of the laser centering instrument in a narrow space; the upper support frame 1 comprises a top plate 11, wherein upper connecting plates 12 are arranged at two ends of the inner surface of the top plate 11, upper bearing seats 13 are arranged at the connecting transition positions of the top plate 11 and the two upper connecting plates 12, upper bearing seat mounting holes 13a are formed in the two upper bearing seats 13, rolling shafts 31 are fixed in the upper bearing seat mounting holes 13a, and the rolling shafts 31 are rotatably provided with follow-up bearings 3; the lower support frame 2 comprises a bottom plate 21, lower connecting plates 22 are arranged at two ends of the inner surface of the bottom plate 21, lower bearing seats 23 are arranged at the connecting transition positions of the bottom plate 21 and the two lower connecting plates 22, lower bearing seat mounting holes 23a are formed in the two lower bearing seats 23, rolling shafts 31 are fixed in the lower bearing seat mounting holes 23a, and follow-up bearings 3 are rotatably arranged on the rolling shafts 31; the central line of the follow-up bearing 3 is parallel to the axis of the shaft to be tested 6 which cannot rotate (namely is parallel to the axis of the input shaft of the speed reducer); the upper support frame 1 and the follow-up bearings 3 on the lower support frame 2 are arranged oppositely, the central lines of the two follow-up bearings 3 on the upper support frame 1 are positioned in the same horizontal plane, and the central lines of the two follow-up bearings 3 on the lower support frame 2 are positioned in the same horizontal plane; the two ends of the upper support frame 1 and the lower support frame 2 are connected through an adjusting device 4, in this embodiment, an upper clamping groove 12a is arranged at the outer end of the upper connecting plate 12, the upper clamping groove 12a penetrates through the top surface and the bottom surface of the upper connecting plate 12, a lower clamping groove 22a is arranged at the outer end of the lower connecting plate 22, the lower clamping groove 22a penetrates through the top surface and the bottom surface of the lower connecting plate 22, a through hole 22b is further formed in the side wall of the lower clamping groove 22a, a positioning pin 43 is arranged in the through hole 22b, a positioning hole 43a and a limiting hole 43b are formed in the positioning pin 43, the positioning hole 43a is communicated with the limiting hole 43b, the central line of the limiting hole 43b is perpendicular to the central line of the positioning hole 43a, and a limiting rod is further arranged in the limiting hole; the adjusting device 4 comprises an adjusting screw rod 41 and an adjusting nut 42, the lower end of the adjusting screw rod 41 is fixed in the positioning hole 43a, and the upper end of the adjusting screw rod passes through the corresponding upper clamping groove 12a to be connected with the adjusting nut 42 so as to adjust the distance between the upper support frame 1 and the lower support frame 2; in another embodiment, the outer ends of the upper connecting plate 12 and the lower connecting plate 22 are provided with mounting holes opposite to each other, the adjusting device 4 comprises an adjusting bolt and an adjusting nut 42, and the adjusting bolt passes through the mounting hole of the upper connecting plate 12 and the corresponding mounting hole of the lower connecting plate 22 to be connected with the adjusting nut 42; two guide rods 5 used for mounting the transmitting end or the receiving end of the laser centering instrument are arranged on the upper surface of the top plate 11 at intervals, so that the centering deviation between the input shaft of the speed reducer and the motor shaft can be obtained through the laser centering instrument.
During measurement, oil stains on the outer end faces of the two half couplers 7 are cleaned, the invention is arranged on an input shaft (a shaft to be measured 6) exposed between the speed reducer and the corresponding half coupler 7, the invention is abutted against the outer end face of the half coupler 7, an existing chain type support is arranged on a motor shaft exposed between the motor and the corresponding half coupler 7, the transmitting end and the receiving end of the laser centering instrument are respectively arranged on guide rods in the invention and the chain type support, the transmitting end and the receiving end of the laser centering instrument realize synchronous rotation by rotating the support and the motor shaft, the positions of the transmitting end and the receiving end of the laser centering instrument are respectively positioned at 0 degree, 90 degree, 180 degree and 270 degree (clock positions of three different angles can be arbitrarily selected according to actual conditions) are used for detecting the centering deviation of the input shaft and the motor shaft, and the position and the angle of the motor are adjusted according to the detection result, the input shaft of the speed reducer is concentric and parallel (centered) with the motor shaft.
As shown in fig. 1, the specific installation steps of the present invention include: the laser alignment device comprises an upper support frame 1 and a lower support frame 2, wherein the upper support frame 1 and the lower support frame 2 are oppositely arranged on an exposed input shaft (a shaft to be measured 6) between a speed reducer and a corresponding half coupling 7, a follow-up bearing 3 on the upper support frame 1 and the lower support frame 2 is attached to the input shaft, the side faces of the upper support frame 1 and the lower support frame 2 are abutted to the corresponding half coupling 7, the center line of the follow-up bearing 3 is ensured to be parallel to the axis of the input shaft, then the distance between the upper support frame 1 and the lower support frame 2 is adjusted by screwing an adjusting nut 4, the upper support frame 1 and the lower support frame 2 are arranged on the input shaft, and then the transmitting end of a laser alignment instrument is arranged on a guide rod 5 on the upper support frame 1.
In summary, the follow-up bearings are arranged on the inner surfaces of the upper support frame and the lower support frame, so that the follow-up bearings are tangent to the input shaft of the speed reducer, the four follow-up bearings are clamped on the input shaft, the upper support frame and the lower support frame can be effectively assisted to rotate on the input shaft, the rotation of the input shaft is simulated, the centering deviation between the input shaft of the speed reducer and the motor shaft is obtained, and the centering precision between the input shaft of the speed reducer and the motor shaft is further ensured; the adjusting devices arranged at the two ends of the upper and lower support frames can adjust the distance between the upper and lower support frames so as to adjust the distance between the follow-up bearings on the upper and lower support frames, and the four follow-up bearings enable the laser centering device to be stably installed on an input shaft of the speed reducer, thereby ensuring the stable reading of the laser centering device; in addition, the thickness of upper bracket and bottom suspension strut does not all exceed 25mm, can satisfy the installation use of laser centering appearance in the narrow and small space, has the commonality.
In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. The utility model provides an auxiliary centering support, including upper bracket (1) that is used for installing laser centering appearance, with upper bracket (1) matched with lower carriage (2), its characterized in that, the both ends of upper bracket (1), lower carriage (2) are all connected through adjusting device (4), the internal surface of upper bracket (1), lower carriage (2) is provided with relatively and awaits measuring axle (6) assorted follower bearing (3), and upper bracket (1) and lower carriage (2) rotate respectively and are provided with two at least follower bearings (3), the central line of follower bearing (3) parallels with awaiting measuring axle (6) axis.
2. The auxiliary centering bracket as claimed in claim 1, wherein the upper supporting frame (1) comprises a top plate (11), two ends of the inner surface of the top plate (11) are provided with upper connecting plates (12), and the connecting transition between the top plate (11) and the two upper connecting plates (12) is provided with an upper bearing seat (13); the lower support frame (2) comprises a bottom plate (21), lower connecting plates (22) are arranged at two ends of the inner surface of the bottom plate (21), lower bearing seats (23) are arranged at the connecting transition positions of the bottom plate (21) and the two lower connecting plates (22), and the follow-up bearings (3) are installed in the upper bearing seats (13) and the lower bearing seats (23).
3. The auxiliary centering bracket according to claim 2, wherein an upper clamping groove (12a) is formed in the outer end of the upper connecting plate (12), the upper clamping groove (12a) penetrates through the top surface and the bottom surface of the upper connecting plate (12), a lower clamping groove (22a) is formed in the outer end of the lower connecting plate (22), the lower clamping groove (22a) penetrates through the top surface and the bottom surface of the lower connecting plate (22), a through hole (22b) is formed in the side wall of the lower clamping groove (22a), a positioning pin (43) is arranged in the through hole (22b), and a positioning hole (43a) is formed in the positioning pin (43); the adjusting device (4) comprises an adjusting screw rod (41) and an adjusting nut (42), the lower end of the adjusting screw rod (41) is fixed in the positioning hole (43a), and the upper end of the adjusting screw rod penetrates through the corresponding upper clamping groove (12a) to be connected with the adjusting nut (42).
4. The auxiliary centering bracket as claimed in claim 3, wherein the positioning pin (43) is further provided with a limiting hole (43b), the limiting hole (43b) is communicated with the positioning hole (43a), the central line of the limiting hole (43b) is perpendicular to the central line of the positioning hole (43a), and a limiting rod for fixing the adjusting screw (41) is further arranged in the limiting hole.
5. Auxiliary centering support according to claim 2, characterized in that the outer ends of the upper connecting plate (12) and the lower connecting plate (22) are provided with attachment holes opposite to each other, and the adjusting means (4) comprises an adjusting bolt and an adjusting nut (42), the adjusting bolt passing through the attachment hole of the upper connecting plate (12) and the corresponding attachment hole of the lower connecting plate (22) and being connected with the adjusting nut (42).
6. Auxiliary centering support according to claim 1, characterized in that the thickness of both the upper support frame (1) and the lower support frame (2) does not exceed 25 mm.
7. Auxiliary centering support according to claim 1, characterized in that the upper surface of the upper support frame (1) is provided with two guide rods (5) spaced apart for mounting the emitting or receiving end of the laser centering instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010581746.1A CN113834473A (en) | 2020-06-23 | 2020-06-23 | Auxiliary centering support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010581746.1A CN113834473A (en) | 2020-06-23 | 2020-06-23 | Auxiliary centering support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113834473A true CN113834473A (en) | 2021-12-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010581746.1A Pending CN113834473A (en) | 2020-06-23 | 2020-06-23 | Auxiliary centering support |
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| Country | Link |
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| CN (1) | CN113834473A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203857942U (en) * | 2014-04-03 | 2014-10-01 | 南京南化建设有限公司 | Laser centering device |
| CN205192450U (en) * | 2015-03-06 | 2016-04-27 | 新疆维吾尔自治区特种设备检验研究院 | Pressure vessel straightness accuracy laser measuring instrument |
| CN107727006A (en) * | 2017-08-04 | 2018-02-23 | 江苏亘德科技有限公司 | A kind of bearing centralising device |
| CN108195857A (en) * | 2018-03-28 | 2018-06-22 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of auxiliary device for different-diameter pipeline non-destructive testing |
| CN209673057U (en) * | 2019-05-16 | 2019-11-22 | 上海臻友设备工程技术有限公司 | A kind of laser alignment instrument of dimension adjustable |
-
2020
- 2020-06-23 CN CN202010581746.1A patent/CN113834473A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203857942U (en) * | 2014-04-03 | 2014-10-01 | 南京南化建设有限公司 | Laser centering device |
| CN205192450U (en) * | 2015-03-06 | 2016-04-27 | 新疆维吾尔自治区特种设备检验研究院 | Pressure vessel straightness accuracy laser measuring instrument |
| CN107727006A (en) * | 2017-08-04 | 2018-02-23 | 江苏亘德科技有限公司 | A kind of bearing centralising device |
| CN108195857A (en) * | 2018-03-28 | 2018-06-22 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of auxiliary device for different-diameter pipeline non-destructive testing |
| CN209673057U (en) * | 2019-05-16 | 2019-11-22 | 上海臻友设备工程技术有限公司 | A kind of laser alignment instrument of dimension adjustable |
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