CN209197677U - A kind of frame assembly left-right longeron hole location concentricity detecting tool - Google Patents
A kind of frame assembly left-right longeron hole location concentricity detecting tool Download PDFInfo
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- CN209197677U CN209197677U CN201920144430.9U CN201920144430U CN209197677U CN 209197677 U CN209197677 U CN 209197677U CN 201920144430 U CN201920144430 U CN 201920144430U CN 209197677 U CN209197677 U CN 209197677U
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- firm banking
- top surface
- laser emitter
- target
- hole location
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Abstract
The utility model provides a kind of frame assembly left-right longeron hole location concentricity detecting tool, left firm banking, it is cube structure, left laser emitter and left target is arranged in the top surface of the left firm banking, left positioning pin and left magnet is arranged in the first side of the left firm banking, the left positioning pin and left stringer outside of belly hole composition are mating, and the left magnet is bonded connection with the left stringer outside of belly, and left handle is arranged in the second side of the left firm banking；Right firm banking, it is cube structure, right laser emitter and right target is arranged in the top surface of the right firm banking, right positioning pin and right magnet is arranged in the first side of the right firm banking, the right positioning pin constitutes mating with right vertical beam outside of belly hole, the right magnet is bonded connection with the right vertical beam outside of belly, and right handle is arranged in the second side of the right firm banking.The utility model can fast implement the detection of stringer hole location concentricity, conveniently beneficial effect.
Description
Technical field
The utility model belongs to stringer detection technique field, in particular to frame assembly left-right longeron hole location concentricity detects
Tooling.
Background technique
Frame assembly is one of most important components of heavy truck, and driver's cabin, engine, gearbox, vehicle bridge etc. are all
Stringer is relied on to be mounted in vehicle frame, the dimensional accuracy of vehicle frame has strong influence to other systems installation accuracy.Left and right is vertical
The concentricity of beam hole location refers to the position accuracy demand in the corresponding hole of vehicle frame left-right longeron, the opposite size in predominantly X, Z-direction hole
Deviation, the installation accuracy of Index Influence engine assembly, suspension system, and then influence final vehicle performance.Existing detection
Method is three coordinate measurements under line, vehicle frame is placed on fixed bracket establish three coordinates systems after, it is tested successively to measure stringer
Hole, record coordinate value carry out concentricity accounting, and the method needs three-dimensional coordinates measurement to expend the time, and production on-site environment factor pair
Measurement result has an impact.
Utility model content
The utility model will solve the problems, such as that the detection of frame assembly left-right longeron hole location concentricity is inconvenient.
To solve the problems of the prior art, the utility model provides a kind of frame assembly left-right longeron hole location concentricity inspection
Tooling, including left firm banking are surveyed, is cube structure, left laser emitter and a left side is arranged in the top surface of the left firm banking
Left positioning pin and left magnet, the left positioning pin and left stringer outside of belly hole is arranged in the first side of target, the left firm banking
Constitute mating, the left magnet is bonded connection with the left stringer outside of belly, and the second side of the left firm banking is arranged left
Hand；Right firm banking is cube structure, and right laser emitter and right target, institute is arranged in the top surface of the right firm banking
Right positioning pin and right magnet is arranged in the first side for stating right firm banking, and the right positioning pin and right vertical beam outside of belly hole constitute grafting
Cooperation, the right magnet are bonded connection with the right vertical beam outside of belly, and right handle is arranged in the second side of the right firm banking.
Preferably, left magnetic blow out centre opens up threaded hole and the first side of left firm banking is bolted, left magnet
It is preferred that 3；Right magnetic blow out centre opens up threaded hole and the first side of right firm banking is bolted, right magnet preferably 3
It is a.
Preferably, left laser emitter is mounted on the top surface of left firm banking by left laser emitter seat, the right side
Laser emitter is mounted on the top surface of right firm banking by right laser emitter seat.
Preferably, left laser emitter seat and right laser emitter seat include sleeve and T-type plate.
Preferably, sleeve is open at one end, the closed cylinder of the other end, the left laser emitter or right Laser emission
For device out of the insertion of sleeve openings end sleeve, sleeve closed end the center point opens up a diameter 1mm aperture, the left laser hair
The laser of emitter or right laser transmitter projects passes through the aperture.
Preferably, T-type plate includes orthogonal riser and transverse slat, and the top surface of the riser is connected with the side of sleeve,
The bottom surface of the riser is connected with the top surface of transverse slat, the top surface or right firm banking of the bottom surface of the transverse slat and left firm banking
Top surface connection.
Preferably, left target is mounted on the top surface of left firm banking by left target seat, and the right target passes through right mark
Target stand is mounted on the top surface of right firm banking.
Preferably, left target seat and right target seat are L-type plates.
Preferably, L-type plate includes orthogonal first plate and the second plate, and left target or the right side is arranged on first plate
The side welding of target, the bottom surface of first plate and the second plate, the bottom surface of second plate and the top surface of left firm banking or
The top surface of the right firm banking of person connects.
Preferably, the second plate opens up the top surface of multiple screw holes and left firm banking or the top surface of right firm banking and passes through spiral shell
Mother connects, setting adjustment gasket between the top surface of the top surface or right firm banking of second plate and left firm banking.
The utility model has the effect that
(1) laser beam is emitted to target by transmitter, the deviant of laser point and target zero point is coaxiality deviation
Value can fast implement the detection of stringer hole location concentricity, convenient and efficient；
(2) laser beam is emitted to right target by left transmitter, the deviant of laser point and right target zero point (can be described as a left side
Stringer axis degree deviant) with right transmitter laser beam is emitted to left target, the deviant of laser point and left target zero point (can be described as
Right vertical beam axis degree deviant) be compared, if left-right longeron hole location axis degree deviant in the margin of tolerance, left stringer
(or right vertical beam) hole location axis degree deviant is left stringer (or right vertical beam) the hole location coaxality measurement as a result, if left-right longeron
Axis degree deviant is not in the margin of tolerance, then left stringer (or right vertical beam) hole location axis degree deviant is that left stringer is (or right vertical
Beam) the hole location coaxality measurement is as a result, the frame assembly is unqualified, wherein if left-right longeron hole location axis degree deviant is towards one
A direction offset, and exceed the margin of tolerance, tested stringer need to be considered with the presence or absence of problem on deformation.If left-right longeron hole location axis degree
Deviant then considers that the utility model is fitted without in left-right longeron, the problem of finding out is reinstalled not all in the margin of tolerance
, so that production on-site environment factor utmostly be avoided to have an impact measurement result.
(3) laser beam of laser transmitter projects is parallel with stringer hole location axis, accurately reflects stringer hole location, measurement
Precision is high.
(4) the utility model light weight is fixed on frame assembly left-right longeron by positioning pin and magnet, easy to operate,
Positioning is quick, secured, effect is good.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram that the utility model detects stringer；
Fig. 3 is the structural schematic diagram for adjusting gasket；
In figure, 1. left firm bankings；2. left laser emitter；3. left target；4. left positioning pin；5. left magnet；6. a left side is vertical
Beam；7. left handle；8. right firm banking；9. right laser emitter；10. right target；11. screw hole；12.L template；13. right vertical beam；
14. right positioning pin；15. right magnet；16. threaded hole；17. sleeve；18.T template；19. aperture；20. riser；21. transverse slat；22.
First plate；23. the second plate；24. adjusting gasket；25. crossbeam；26. right handle.
Specific embodiment
Below in conjunction with attached drawing, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that
The described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.Attached drawing is given for example only
Property explanation, expression is only schematic diagram, rather than pictorial diagram, should not be understood as the limitation to this patent, in order to be better described this
The specific embodiment of utility model, the certain components of attached drawing, which have, to be zoomed in or out, and does not represent the size of actual product, to this
For the technical staff of field, the omitting of some known structures and their instructions in the attached drawings are understandable, practical new based on this
Embodiment in type, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, fall within the protection scope of the utility model.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the present invention.
Embodiment one
As shown in Figure 1-3, a kind of frame assembly left-right longeron hole location concentricity detecting tool, including left firm banking 1,
Left laser emitter 2 and left target 3, the left firm banking 1 is arranged in top surface for cube structure, the left firm banking 1
First side left positioning pin 4 and left magnet 5, the left positioning pin 4 and left 6 outside of belly hole of stringer mating, the institute of composition are set
It states left magnet 5 and is bonded connection with left 6 outside of belly of stringer, left handle 7 is arranged in the second side of the left firm banking 1；Right fixed bottom
Seat 8, is cube structure, and right laser emitter 9 and right target 10 is arranged in the top surface of the right firm banking 8, described right solid
Right positioning pin 14 and right magnet 15 is arranged in the first side for determining pedestal 8, and the right positioning pin 14 is constituted with 13 outside of belly hole of right vertical beam
Mating, the right magnet 15 is bonded connection with 13 outside of belly of right vertical beam, and the second side of the right firm banking 8 is arranged right
Hand 26.
Usage mode is as follows: frame assembly includes left stringer 6, right vertical beam 13, before the left stringer 6 of some vehicles, right vertical beam 13
When side opening position does not have crossbeam 25, it can be allowed to be in measured state left stringer 6, the support fixation of right vertical beam 13 with technique crossbeam 25,
Lift left firm banking 1 using the left handle 7 of left firm banking 1 to position by left 6 outside of belly hole of stringer of left 4 grafting of positioning pin, it is left
The 4 left magnet 5 in lower section of positioning pin is bonded with left 6 outside of belly of stringer to be sucked, and lifts right fixed bottom using the right handle 26 of right firm banking 8
Seat 8 is positioned by right 14 grafting right vertical beam of positioning pin, 13 outside of belly hole, the right magnet 15 in right 14 lower section of positioning pin and 13 outside of belly of right vertical beam
Fitting sucks, and the utility model position fixing process is completed；Left firm banking 1 and 8 installation site of right firm banking are symmetrical, open left sharp
Optical transmitting set 2, right laser emitter 9, the laser beam that left laser emitter 2 emits beat the right target 10 on right firm banking
In, the offset of left laser point and right 10 zero point of target is left 6 axis angle value of stringer, can directly be read, as a frame assembly left side
6 hole location concentricity detected value of stringer, the laser beam that right laser emitter 9 emits are beaten in the left target 3 on left firm banking 8,
The offset of right laser point and left 3 zero point of target is 13 axis angle value of right vertical beam, can directly be read, as frame assembly right vertical beam
13 hole location concentricity detected values.
As exemplary illustration, other rulers are also can be selected in the pin of left positioning pin 4, the preferable Φ 15mm of right positioning pin 14
The diameter of very little pin, pin depends on left stringer 6,13 outside of belly hole size of right vertical beam, the preferably left setting of firm banking 1 two
A left positioning pin 4, two left positioning pins 4 can be different with size shape, and similarly, two right positioning pins are arranged in right firm banking 1
14, two right positioning pins 14 can be different with size shape.As exemplary illustration, left magnet 5, the optional circle of right magnet 15,
Certain also optional other shapes, such as it is rectangular.
The embodiment has the effect that
(1) laser beam is emitted to target by laser emitter, the deviant of laser point and target zero point is concentricity
Deviation can fast implement the detection of stringer hole location concentricity, convenient and efficient；
(2) laser beam, the deviant of laser point and right 10 zero point of target are emitted by the right target 10 of 2 pairs of left laser emitter
The left target 3 of (can be described as left 6 axis degree deviant of stringer) and 9 pairs of right laser emitter emits laser beam, laser point and left target 3 zero
The deviant (can be described as 13 axis degree deviant of right vertical beam) of point is compared, if 13 axis degree deviant of left stringer 6 and right vertical beam
In the margin of tolerance, then left stringer 6 (or right vertical beam 13) hole location axis degree deviant is left stringer 6 (or right vertical beam 13) hole
Position coaxality measurement result.If left stringer 6 and 13 axis degree deviant of right vertical beam not in the margin of tolerance, left stringer 6 (or
Right vertical beam 13) hole location axis degree deviant is left stringer 6 (or right vertical beam 13) hole location coaxality measurement as a result, the frame assembly
It is unqualified, wherein if left-right longeron hole location axis degree deviant deviates in one direction, and exceed the margin of tolerance, it need to consider quilt
Surveying stringer whether there is problem on deformation.If left-right longeron hole location axis degree deviant considers this reality not all in the margin of tolerance
It is fitted without with novel in left-right longeron, the problem of finding out is reinstalled, to utmostly avoid production on-site environment
Factor has an impact measurement result.
(3) laser beam that left laser emitter 2 emits is parallel with left stringer hole location axis, accurately reflects left stringer hole site
Degree, measurement accuracy is high, and the laser beam that right laser emitter 9 emits is parallel with right vertical beam hole location axis, accurately reflects right vertical beam hole
Position degree, measurement accuracy are high.
(4) the utility model light weight is fixed on frame assembly left-right longeron, operation side by positioning pin 4 and magnet 5
Just, practical, positioning is fast, secured, effect is good.
As the preferred of above-described embodiment, left magnet 5 opens up threaded hole 16 and the first side of left firm banking 1 passes through
It is bolted, the left magnet 5 preferably 3；Right 15 center of magnet opens up threaded hole and the first side of right firm banking 8 is logical
It crosses and is bolted, the right magnet 15 preferably 3.Left firm banking 1 is more accurate by 3 left left positioning pins 4 of magnet 5 and 2
Ground is located in left stringer 6, and right firm banking 8 is more accurately located in right vertical beam by 3 right right positioning pins 14 of magnet 15 and 2
13。
As the preferred of above-described embodiment, left laser emitter 2 is mounted on left firm banking 1 by left laser emitter seat
Top surface on, the right laser emitter 9 is mounted on the top surface of right firm banking 8 by right laser emitter seat.
As the preferred of above-described embodiment, left laser emitter seat and right laser emitter seat include sleeve 17 and T-type
Plate 18.
As the preferred of above-described embodiment, sleeve 17 is open at one end, the closed cylinder of the other end, the left laser hair
Out of the insertion of 17 open end of sleeve sleeve 17, the 17 closed end the center point of sleeve opens up one for emitter 2 or right laser emitter 9
The laser that diameter 1mm aperture 19, the left laser emitter 2 or right laser emitter 9 emit passes through the aperture 19.Left laser
Transmitter 2, right laser emitter 9 select the laser emitter for the sending 1mm light beam that can be sold on the market, and left laser emitter 2 is sent out
The laser beam penetrated is parallel with left stringer hole location axis, accurately reflects left stringer hole location, measurement accuracy is high, right laser emitter
The laser beam of 9 transmittings is parallel with right vertical beam hole location axis, accurately reflects right vertical beam hole location, and measurement accuracy is high.When left laser
When transmitter 2 or right laser emitter 9 damage, for convenience of left laser emitter 2 or right laser emitter 9 are taken from sleeve 17
It out, can be by 17 Design of length of sleeve at shorter than left 2 ontology of laser emitter or 9 ontology of right laser emitter.
As the preferred of above-described embodiment, T-type plate 18 includes orthogonal riser 20 and transverse slat 21, the riser 20
Top surface is connected with the side of sleeve 17, and the bottom surface of the riser 20 is connected with the top surface of transverse slat 21, the bottom surface of the transverse slat 21 with
The top surface of left firm banking 1 or the top surface connection of right firm banking 8.The design of T-type plate 18 both can guarantee left laser emitter 2 very
It is fixed on well on left firm banking 1, right laser emitter 9 is well secured on right firm banking 8, and can save production T
18 material cost of template.
Preferably, left target 3 is mounted on the top surface of left firm banking 1 by left target seat, and the right target 10 passes through
Right target seat is mounted on the top surface of right firm banking 8.
As the preferred of above-described embodiment, left target seat and right target seat are L-type plates 12.
As the preferred of above-described embodiment, L-type plate 12 include orthogonal first plate 22 and the second plate 23, described first
Left target 3 or right target 10 be set on plate 22, the side welding of the bottom surface of first plate 22 and the second plate 23, described second
The bottom surface of plate 23 is connect with the top surface of the top surface of left firm banking 1 or right firm banking 8.The design of L-type plate 12 both can guarantee a left side
Target seat or right target seat are well secured to left firm banking 1 or right firm banking 8, and can save production 12 material of L-type plate
Cost；As exemplary illustration, it is the rectangular irregular shape plate in isosceles trapezoid lower part that the first plate 22, which can be top, saves material
Material, good appearance, naturally it is also possible to be the square plate of rule.
Target surface is the grid at the interval 1mm, for cross target or concentric circles target, laser point and target zero point
Offset is the coaxial angle value in left-right longeron hole, can directly be read, as frame assembly left-right longeron hole location concentricity detected value.
As the preferred of above-described embodiment, the second plate 23 opens up the top surface or the right side of multiple screw holes 11 and left firm banking 1
The top surface of firm banking 8 is connected by nut, the top surface or right firm banking 8 of second plate 23 and left firm banking 1
Setting adjustment gasket 24 between top surface.The shape of adjustment gasket 24 can be as shown in figure 3, the long side surface in square plate opens up two
A U-lag, the adjustment effect of gasket 2 is to adjust target, it is ensured that flat in same axis in left firm banking 1 and right firm banking 8
The laser beam spot that left laser emitter 2 emits when face is in right 10 zero point of target, and the laser beam spot of right laser transmitter projects 9 is on a left side
3 zero point of target.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (10)
1. a kind of frame assembly left-right longeron hole location concentricity detecting tool, it is characterised in that: including
Left firm banking is cube structure, and left laser emitter and left target, institute is arranged in the top surface of the left firm banking
Left positioning pin and left magnet is arranged in the first side for stating left firm banking, and the left positioning pin and left stringer outside of belly hole constitute grafting
Cooperation, the left magnet are bonded connection with the left stringer outside of belly, and left handle is arranged in the second side of the left firm banking；
Right firm banking is cube structure, and right laser emitter and right target, institute is arranged in the top surface of the right firm banking
Right positioning pin and right magnet is arranged in the first side for stating right firm banking, and the right positioning pin and right vertical beam outside of belly hole constitute grafting
Cooperation, the right magnet are bonded connection with the right vertical beam outside of belly, and right handle is arranged in the second side of the right firm banking.
2. a kind of frame assembly left-right longeron hole location concentricity detecting tool according to claim 1, it is characterised in that: left
Magnetic blow out centre opens up threaded hole and the first side of left firm banking is bolted, and left magnet preferably 3；In right magnet
The heart opens up threaded hole and the first side of right firm banking is bolted, and right magnet preferably 3.
3. a kind of frame assembly left-right longeron hole location concentricity detecting tool according to claim 1, it is characterised in that: institute
It states left laser emitter to be mounted on the top surface of left firm banking by left laser emitter seat, the right laser emitter passes through
Right laser emitter seat is mounted on the top surface of right firm banking.
4. a kind of frame assembly left-right longeron hole location concentricity detecting tool according to claim 3, it is characterised in that: institute
Stating left laser emitter seat and right laser emitter seat includes sleeve and T-type plate.
5. a kind of frame assembly left-right longeron hole location concentricity detecting tool according to claim 4, it is characterised in that: institute
Stating sleeve is open at one end, the closed cylinder of the other end, the left laser emitter or right laser emitter from sleeve openings
In end insertion sleeve, sleeve closed end the center point opens up a diameter 1mm aperture, the left laser emitter or right laser
The laser of transmitter transmitting passes through the aperture.
6. a kind of frame assembly left-right longeron hole location concentricity detecting tool according to claim 4, it is characterised in that: institute
Stating T-type plate includes orthogonal riser and transverse slat, and the top surface of the riser is connected with the side of sleeve, the bottom surface of the riser
It is connected with the top surface of transverse slat, the bottom surface of the transverse slat is connect with the top surface of the top surface of left firm banking or right firm banking.
7. a kind of frame assembly left-right longeron hole location concentricity detecting tool according to claim 1, it is characterised in that: institute
It states left target to be mounted on the top surface of left firm banking by left target seat, the right target is mounted on right solid by right target seat
Determine on the top surface of pedestal.
8. a kind of frame assembly left-right longeron hole location concentricity detecting tool according to claim 7, it is characterised in that: institute
Stating left target seat and right target seat is L-type plate.
9. a kind of frame assembly left-right longeron hole location concentricity detecting tool according to claim 8, it is characterised in that: institute
Stating L-type plate includes orthogonal first plate and the second plate, is arranged left target or right target on first plate, and described first
The bottom surface of plate and the welding of the side of the second plate, the bottom surface of second plate and the top surface of left firm banking or right firm banking
Top surface connection.
10. a kind of frame assembly left-right longeron hole location concentricity detecting tool according to claim 9, it is characterised in that:
Second plate opens up multiple screw holes and is connect with the top surface of the top surface of left firm banking or right firm banking by nut, described
Setting adjustment gasket between the top surface of the top surface or right firm banking of second plate and left firm banking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920144430.9U CN209197677U (en) | 2019-01-28 | 2019-01-28 | A kind of frame assembly left-right longeron hole location concentricity detecting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920144430.9U CN209197677U (en) | 2019-01-28 | 2019-01-28 | A kind of frame assembly left-right longeron hole location concentricity detecting tool |
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| Publication Number | Publication Date |
|---|---|
| CN209197677U true CN209197677U (en) | 2019-08-02 |
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ID=67431846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920144430.9U Active CN209197677U (en) | 2019-01-28 | 2019-01-28 | A kind of frame assembly left-right longeron hole location concentricity detecting tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111336946A (en) * | 2020-05-07 | 2020-06-26 | 西南科技大学 | Device and method for measuring surface appearance of inner wall of cylindrical part based on non-diffraction light beam |
| CN112432615A (en) * | 2020-11-05 | 2021-03-02 | 渤海造船厂集团有限公司 | Spacing correction method for non-rotatable shaft |
| CN112857779A (en) * | 2021-02-20 | 2021-05-28 | 中国铁路通信信号上海工程局集团有限公司 | Comprehensive detection method for performance of steel-concrete composite beam |
| CN114001677A (en) * | 2021-11-05 | 2022-02-01 | 中建八局新型建造工程有限公司 | Device and method for measuring central shaft deviation of butt-jointed pipelines with different diameters |
| CN115451869A (en) * | 2022-08-16 | 2022-12-09 | 成都飞机工业（集团）有限责任公司 | Online detection device and method for coaxiality of pipeline connecting piece |
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2019
- 2019-01-28 CN CN201920144430.9U patent/CN209197677U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336946A (en) * | 2020-05-07 | 2020-06-26 | 西南科技大学 | Device and method for measuring surface appearance of inner wall of cylindrical part based on non-diffraction light beam |
| CN112432615A (en) * | 2020-11-05 | 2021-03-02 | 渤海造船厂集团有限公司 | Spacing correction method for non-rotatable shaft |
| CN112857779A (en) * | 2021-02-20 | 2021-05-28 | 中国铁路通信信号上海工程局集团有限公司 | Comprehensive detection method for performance of steel-concrete composite beam |
| CN114001677A (en) * | 2021-11-05 | 2022-02-01 | 中建八局新型建造工程有限公司 | Device and method for measuring central shaft deviation of butt-jointed pipelines with different diameters |
| CN114001677B (en) * | 2021-11-05 | 2024-05-10 | 中建八局新型建造工程有限公司 | Central shaft deviation measuring device and measuring method for butt-joint pipelines with different diameters |
| CN115451869A (en) * | 2022-08-16 | 2022-12-09 | 成都飞机工业（集团）有限责任公司 | Online detection device and method for coaxiality of pipeline connecting piece |
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