CN109877517A - A kind of internal expansion type flange positioning tool - Google Patents
A kind of internal expansion type flange positioning tool Download PDFInfo
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- CN109877517A CN109877517A CN201910304549.2A CN201910304549A CN109877517A CN 109877517 A CN109877517 A CN 109877517A CN 201910304549 A CN201910304549 A CN 201910304549A CN 109877517 A CN109877517 A CN 109877517A
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- crossbar
- positioning tool
- expansion type
- internal expansion
- fixed bar
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- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 6
- 208000004350 Strabismus Diseases 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000233855 Orchidaceae Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Abstract
It include: first crossbar, the second crossbar that end is fixedly connected with longitudinally fixed bar, the telescoping mechanism being located between first crossbar and second crossbar that longitudinally fixed bar, end are slidably connected on longitudinally fixed bar the invention discloses a kind of internal expansion type flange positioning tool；Movable support mechanism is also set up in the first crossbar；By using the positioning tool, internal expansion type pivot flange and pipeline simultaneously are realized, the counterpart precision in flange and pipeline welding or in flange welding, pipeline welding is improved, reduces labour costs, improve productivity effect.
Description
Technical field
The present invention relates to pipeline welding technology fields, more particularly to a kind of internal expansion type flange positioning tool.
Background technique
In oil field, the reconstruction of oil-gas pipeline or new construction, the installation of valve is a mostly important job, usually
A strip transmission line at least welding installation all kinds of 20, valve or more, valve connecting flange needs to weld flange and pipeline,
Therefore the welding of flange also just becomes the pith in reconstruction or newly-built work.
The welding manner of pipeline and flange is divided into following six kinds of fundamental types: slip-on welding flange, W.N flange, socket joint welding method
Orchid, loose flange, screwed flange and integral (type) flange, pipeline must reach flange and pipeline location with flange in the welding process
Accurate counterpart, to guarantee the quality of welding, currently, positioning method when welded flange mainly still uses artificial counterpart mode,
Also positioning welding is carried out to flange with using clamp fixture, repeatedly could be substantially aligned by the way of artificial counterpart, with
For DN50mm, counterpart needs 15 minutes or so, takes a long time, and counterpart precision is not high, and when welding needs at least two people to match
It closes, and personnel labor intensity is larger, labor intensive cost is positioned using clamp fixture, since clamp fixture is using fixed
Flange or pipeline are clamped, more demanding to the clamping force of fixture, structure is complicated, is not easy to move or operate with, and is easy
The phenomenon that there is pipeline clamping shakiness and sliding.
Summary of the invention
The present invention is intended to provide a kind of internal expansion type flange positioning tool is to solve flange welding pair existing in the prior art
Mouth takes a long time, and counterpart precision is not high, and personnel labor intensity is larger, labor intensive cost, or structure is complicated, not easy to operate to make
The problem of using.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: a kind of internal expansion type flange positioning is provided
Tooling, comprising: it is solid that longitudinally fixed bar, end are slidably connected at first crossbar, end and longitudinally fixed bar on longitudinally fixed bar
Surely the second crossbar connected, the telescoping mechanism being located between first crossbar and second crossbar；The second crossbar and first crossbar
Parallel arrangement；One end that the first crossbar is connect with the longitudinally fixed bar sets sliding pinning；It is opened on the longitudinally fixed bar
There is the first slide opening for the sliding pinning sliding；The sliding pinning passes through first slide opening and connects with first crossbar screw thread
It connects；The telescoping mechanism includes: the connecting column being located between first crossbar and second crossbar, the spring covered on connecting column, opens
The second slide opening being located in the first crossbar；Described connecting column one end is fixed in the second crossbar, and the other end penetrates institute
State the second slide opening；
Movable support mechanism is also set up in the first crossbar；The movable support mechanism includes: to be provided with first crossbar
Longitudinal sliding motion block that interior loose slot, longitudinal sliding motion are arranged in loose slot slides laterally two pads being arranged in loose slot
High block, the screw rod a and screw rod b being respectively and fixedly connected with two keels；The screw rod a is threaded in the screw, longitudinally fixed
The inside of bar and first crossbar；The screw rod b is threaded in the inside of the first crossbar；The keel is close to described vertical
It is inclined-plane to the one side of sliding shoe.
Further, at least 2 groups of the telescoping mechanism.
Further, the end of the second crossbar offers the first groove.
Further, it raises upward to form raised line in the middle part of the second crossbar.
Further, the position that the telescoping mechanism is corresponded on the raised line be provided with placed for the spring it is second recessed
Slot.
Further, the section of the second crossbar is in T shape.
Further, the longitudinally fixed bar, first crossbar, the material of second crossbar are aluminium alloy.
Further, the longitudinally fixed bar is equipped with handle；The handle is fixedly connected on the longitudinally fixed bar.
Further, the equal length of the first crossbar and second crossbar.
Further, the end of the second crossbar is fixedly connected by bolt with the longitudinally fixed bar.
The beneficial effects of the present invention are:
1. the internal expansion type flange positioning tool is used, by the setting of first crossbar, second crossbar, telescoping mechanism, and
First crossbar is slidably connected with the longitudinally fixed bar, and telescoping mechanism is arranged between first crossbar and second crossbar, can incite somebody to action
First crossbar and second crossbar penetrate the inside of flange and pipeline under telescoping mechanism confined state, and telescoping mechanism being capable of basis
The inner diameter size of flange and pipeline freely struts, and pushes first crossbar and second crossbar while being supported on the interior of flange and pipeline
On wall, internal expansion type pivot flange and pipeline simultaneously are realized, is improved in flange and pipeline welding or in flange welding, pipeline welding
Counterpart precision；
2. sliding first crossbar places the tooling and the operation of the compression telescoping mechanism is very simple, can single behaviour
Making the positioning tool can be achieved with accurate counterpart in flange welding, reduces labour costs, improves productivity effect；
3. also setting up movable support mechanism in first crossbar by setting, movable support mechanism includes: to be provided with first
Longitudinal sliding motion block that loose slot, longitudinal sliding motion in cross bar are arranged in loose slot slides laterally two be arranged in loose slot
A keel, the screw rod a and screw rod b being respectively and fixedly connected with two keels；Sliding shoe in movable support mechanism is in screw rod a and spiral shell
Bar b precession first crossbar simultaneously pushes longitudinal sliding motion block upward sliding, realizes the internal diameter according to pipeline or flange and adjusts support
Highly, so that the tooling is adjusted bearing height according to pipeline, expand the scope of application of the tooling.
Detailed description of the invention
Fig. 1 is the strabismus schematic diagram of internal expansion type flange positioning tool provided by the invention；
Fig. 2 is the internal structure schematic cross-sectional view of internal expansion type flange positioning tool provided by the invention；
Fig. 3 is the internal structure strabismus schematic diagram of first crossbar in internal expansion type flange positioning tool provided by the invention；
Fig. 4 is the right side view of internal expansion type flange positioning tool use state provided by the invention；
Fig. 5 is the strabismus schematic diagram of internal expansion type flange positioning tool use state provided by the invention；
Fig. 6 is that second crossbar squints schematic diagram in internal expansion type flange positioning tool provided by the invention；
Fig. 7 is the internal structure strabismus of the use state of first crossbar in internal expansion type flange positioning tool provided by the invention
Schematic diagram；
Appended drawing reference: the longitudinally fixed bar of 1-, 11- handle, 2- first crossbar, 3- second crossbar, the first groove of 31-, 32- are convex
Item, the second groove of 33-, 4- telescoping mechanism, 41- connecting column, 42- spring, the second slide opening of 43-, 5- slide pinning, and 6- first is sliding
Hole, 7- movable support mechanism, 71- loose slot, 72- longitudinal sliding motion block, 73- keel, 74- screw rod a, 75- screw rod b, 76- are oblique
Face, 00- flange, 99- pipeline.
Specific embodiment
The specific embodiment of internal expansion type flange positioning tool provided by the invention is carried out with reference to the accompanying drawing detailed
Description.
In the description of the present invention, it should be noted that term " on ", "lower", "inner", "outside", " longitudinal direction ", " transverse direction " position
Setting relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, rather than
The device or part of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot
Be interpreted as limitation of the present invention, " first ", " second " be merely for convenience of description and differentiation to name, and
Also there is corresponding position mark in the accompanying drawings, should not be construed as specific and particular meaning reference.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, belong to " installation ", " phase
Even ", " 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 at this with concrete condition
Concrete meaning in invention.
As shown in Figure 1-Figure 3, internal expansion type flange positioning tool provided by the invention includes: longitudinally fixed bar 1, end sliding
Second crossbar 3 that the first crossbar 2 that is connected on longitudinally fixed bar 1, end are fixedly connected with longitudinally fixed bar 1 is located at first
Telescoping mechanism 4 between cross bar 2 and second crossbar 3；The second crossbar 3 is arranged in parallel with first crossbar 2；The first crossbar
2 one end connecting with the longitudinally fixed bar 1 set sliding pinning 5；It is provided on the longitudinally fixed bar 1 for the sliding pinning 5
First slide opening 6 of sliding；The sliding pinning 5 passes through first slide opening 6 and is threadedly coupled with first crossbar 2；It is described flexible
Mechanism 4 includes: the connecting column 41 being located between first crossbar 2 and second crossbar 3, the spring 42 covered on connecting column 41, opens up
The second slide opening 43 in the first crossbar 2；Described 41 one end of connecting column is fixed in the second crossbar 3, and the other end is worn
Enter second slide opening 43；
Movable support mechanism 7 is also set up in the first crossbar 2；The movable support mechanism includes: to be provided with the first cross
Longitudinal sliding motion block 72 that loose slot 71 in bar 2, longitudinal sliding motion are arranged in loose slot 71 slides laterally and is arranged in loose slot 71
The screw rod a74 and screw rod b75 that two interior keels 73 and two keels 73 are respectively and fixedly connected with；The screw rod a74 is threadedly coupled
In the inside of the screw 5, longitudinally fixed bar 1 and first crossbar 2；The screw rod b75 is threaded in the first crossbar 2
It is internal；The keel 73 is inclined-plane 76 close to the one side of the longitudinal sliding motion block 72.
In internal expansion type flange positioning tool provided by the present invention, the longitudinally fixed bar 1 be strip bar, be longitudinally arranged with
So that first crossbar 2 and second crossbar 3 is connected to its side, constitutes the basic framework of the tooling.
In internal expansion type flange positioning tool provided by the present invention, by being provided with described in confession on the longitudinally fixed bar 1
The first slide opening 6 that pinning 5 slides is slided, one end that the first crossbar 2 is connect with the longitudinally fixed bar 1 is set into sliding pinning
5, also, the sliding pinning 5 is passed through and first slide opening 6 and is threadedly coupled with first crossbar 2, slide lock 5 is relative to the
One cross bar can be penetrated or be exited inside first crossbar 2 by screw thread, so that the end of first crossbar 2 and the longitudinally fixed bar
1 side gets close to or keeps gap, so that slide lock 5 can slide up and down in first slide opening 6, to make the first cross
Bar 2 can be slided up and down along the side of longitudinally fixed bar 1；When needing that first crossbar 2 is fixed on relative to longitudinally fixed bar 1
When upper a certain position, the slide lock 5 is penetrated by screw thread to the inside of the first crossbar, so that first crossbar 2
End can be close to the side wall of the longitudinally fixed bar 1, by the frictional force with the longitudinally fixed bar relative to always want from
The position that is static and securing first crossbar 2 of fixed link 1 reaches and adjusts the distance of first crossbar 2 and second crossbar 3, with reality
Now penetrate different inner diameters flange (such as Fig. 4 or appended drawing reference shown in fig. 5 institute diagram 00, the flange be it is universal needed for welding
Flange, without the limitation of model or specification) and pipeline (Figure 99 shown in appended drawing reference shown in fig. 5) inside, and support
(internal expanding) plays flange and pipeline, has the welding counterpart for being suitble to different inner diameters, the flange of caliber and pipeline, to improve the work
The practicability of dress.
In internal expansion type flange positioning tool provided by the present invention, by the setting of telescoping mechanism 4, need to illustrate herein
It is that the telescoping mechanism refers to that the mechanism stretched out or compressed can be cooperated with the first crossbar 2 and second crossbar 3, by
In the motive force and the spring 42 of first crossbar 2 and second crossbar 3 elastic-restoring force and realize it is flexible, it is not universal from
The flexible meaning of driving；As shown in Figure 2 and Figure 6, the telescoping mechanism 4 includes: to be located between first crossbar 2 and second crossbar 3
Connecting column 41, cover in the spring 42 on connecting column 41, the second slide opening 43 for being provided in the first crossbar 2；The connection
41 one end of column is fixed in the second crossbar 3, and the other end penetrates second slide opening 43, and the connecting column 41 is that can weld
Or it is fixed on the metal column in the second crossbar, have the function of connecting second crossbar 3 and first crossbar 2, it may have keep
The non-wiping effect of the spring 42, when the gap of the first crossbar 2 and second crossbar 3 is because of the downward (attached drawing 2 of first crossbar 2
Shown orientation) it is mobile when, connecting column upper end penetrates second slide opening 43 and moves into the second slide opening, so that cooperation first is horizontal
Bar 2 slides up and down, and it is on flange and pipeline and (interior by the support of the restoring force of spring to realize that the positioning tool can be covered
Rise) flange and pipeline are played, first crossbar is pressed by operator to make first crossbar 2 slide institute relative to longitudinally fixed bar 1
The power used far smaller than moves pipeline or flange to realize power used in counterpart, has reached easy to operate and labor-saving effect
Fruit also avoids manpower and moves in flange or pipeline due to manual support flange and pipeline unevenly occurs with respect to shaking counterpart not
Accurate situation occurs, so that the effect of accurate counterpart and locating flange and pipeline is realized, and one or two people can be operated,
Save human cost.
As shown in figure 3, also setting up activity in the first crossbar 2 in internal expansion type flange positioning tool provided by the invention
Supporting mechanism 7, offers loose slot 71 in the first crossbar, described movable 71 can pass through during the frock making by
First crossbar 2 is divided processes for two parts, is welded again after fluting, can be realized and carry out opening up loose slot in first crossbar
71, it should be noted that the loose slot includes the space for 72 longitudinal sliding motion of longitudinal sliding motion block, also includes supplying the pad
The space of high 73 transverse shifting of block；It is opened up and the threaded rod a74 and threaded rod b75 cooperation by the both ends in first crossbar
Internal screw thread carries out the first cross after welding in threaded rod a and threaded rod b insertion first crossbar 2 and with the end of keel 73 again
The welding of bar achievees the purpose that assemble the tooling；72 longitudinal sliding motion of longitudinal sliding motion block is arranged in loose slot 71, the cunning
Dynamic setting refers to that longitudinal sliding motion block 72 can be by the promotion of keel 73 in activity in the loose slot 71 in first crossbar 2
Longitudinal sliding motion (longitudinal sliding motion block 72 is embedded in first crossbar 2) in slot 71, the keel 73 is close to the longitudinal sliding motion block 72
One side be inclined-plane 76, the screw rod a74 and screw rod b75 that the non-beveled ends of two keels 73 are respectively and fixedly connected with rotate spiral shell manually
Bar makes screw rod a or screw rod b from when the precession of first crossbar end, the screw rod a74 and states screw rod b75 and will push two keels
73 above push away the longitudinal sliding motion block 72, increase longitudinal sliding motion block 72 and are supported on the position of 76 different height of inclined-plane,
To achieving the purpose that increase in loose slot 71 longitudinal sliding motion block 72, the highest state of longitudinal sliding motion block 72 as shown in fig. 7,
Conversely, decline longitudinal sliding motion block 72, then by screwing out screw rod a and screw rod b, the minimum state of longitudinal sliding motion block 72 such as Fig. 3
It is shown, it realizes the internal diameter according to pipeline or flange and adjusts bearing height, the tooling is enable to adjust support height according to pipeline
Degree, making the tooling is suitable for the welding of bigger pipe diameter, expands the scope of application of the tooling.
In internal expansion type flange positioning tool provided by the present invention, at least 2 groups of the telescoping mechanism 4, it can be set more
Group telescoping mechanism 4, to increase the duct length that the positioning tool can position, according to actual needs in the quantity of telescoping mechanism
Adjustment, further enhances the practicability of the tooling, and makes more stable in the tooling use, has played preferable locating effect.
In internal expansion type flange positioning tool provided by the present invention, as shown in fig. 6, the end of the second crossbar 3 is provided with
First groove 31, to enable second crossbar is stronger to be fixed on the side wall of longitudinally fixed bar, to enhance the work
The fastness of dress, and keep its compact-sized, facilitate operation.
In internal expansion type flange positioning tool provided by the present invention, as shown in fig. 6, can also be at the middle part of second crossbar 3
It raises upward to form raised line 32, the position that the telescoping mechanism 4 is corresponded on the raised line 32 is offered places for the spring 42
The second groove 33, the section of the second crossbar 3 is in T shape, by the setting of the second groove, makes one section of spring 42 can
Second crossbar is fallen into, has the function that the higher spring of coefficient of elasticity is installed, also, as shown in figure 3, pass through raised line 32 and T word
The setting of the second crossbar of tee section forms first crossbar and second crossbar when support (internal expanding) is in flange or pipeline
Portion is supported at the top of flange or pipeline, and for lower support in the two lines of flange or inner wall of the pipe, formation is inscribed in flange or pipe
The gusseted in road enhances the stability in the tooling use.
In internal expansion type flange positioning tool provided by the present invention, the longitudinally fixed bar 1, first crossbar 2, second crossbar
3 material is aluminium alloy, and there is aluminium alloy material light characteristic is taught compared with steel, is convenient for carrying and operates, thus it is easy to produce and
Assembling, cost is not high, practical, easy to spread.
As shown in Figure 1, the longitudinally fixed bar 1 is equipped with handle in internal expansion type flange positioning tool provided by the present invention
Hand 11；The handle 11 is fixedly connected on the longitudinally fixed bar 1, is facilitated operator to carry or be affectedly bashful and use, is made this
Tooling is more convenient to be used.
In internal expansion type flange positioning tool provided by the present invention, the length phase of the first crossbar 2 and second crossbar 3
Deng making the compact-sized of the tooling, and easy to use, the stronger effect of practicability.
In internal expansion type flange positioning tool provided by the present invention, the end of the second crossbar 3 by bolt with it is described
Longitudinally fixed bar 1 is fixedly connected, the component in easy to repair and replacement second crossbar 3 or second crossbar, and sound construction, is prolonged
The service life of the tooling is grown.
Each technical characteristic of embodiment described above can carry out any combination, for simplicity of description, not to above-mentioned implementation
The all possible combination of each technical characteristic in example is all described, as long as however, the combination of these technical characteristics is not present
Contradiction all should be considered as described in this specification, and the above description is only an embodiment of the present invention, be not intended to limit this
The scope of the patents of invention, it is all using equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, or
Other related technical areas directly or indirectly are used in, are included within the scope of the present invention.
Claims (10)
1. a kind of internal expansion type flange positioning tool characterized by comprising longitudinally fixed bar, end are slidably connected at longitudinal solid
Second crossbar that first crossbar, end in fixed pole are fixedly connected with longitudinally fixed bar, be located at first crossbar and second crossbar it
Between telescoping mechanism；The second crossbar and first crossbar are arranged in parallel；The first crossbar is connect with the longitudinally fixed bar
One end set sliding pinning；The first slide opening for the sliding pinning sliding is provided on the longitudinally fixed bar；The slide lock
Nail is threadedly coupled across first slide opening and with first crossbar；The telescoping mechanism includes: to be located at first crossbar and the second cross
Connecting column, the spring covered on connecting column between bar, the second slide opening being provided in the first crossbar；The connecting column one
End is fixed in the second crossbar, and the other end penetrates second slide opening；
Movable support mechanism is also set up in the first crossbar；The movable support mechanism includes: to be provided in first crossbar
Longitudinal sliding motion block that loose slot, longitudinal sliding motion are arranged in loose slot, slide laterally two keels being arranged in loose slot,
The screw rod a and screw rod b being respectively and fixedly connected with two keels；The screw rod a is threaded in the screw, longitudinally fixed bar and
The inside of one cross bar；The screw rod b is threaded in the inside of the first crossbar；The keel is close to the longitudinal sliding motion
The one side of block is inclined-plane.
2. internal expansion type flange positioning tool according to claim 1, it is characterised in that: at least 2 groups of the telescoping mechanism.
3. internal expansion type flange positioning tool according to claim 1, it is characterised in that: the end of the second crossbar is provided with
First groove.
4. internal expansion type flange positioning tool according to claim 1, it is characterised in that: the middle part of the second crossbar is upward
Convex to form raised line.
5. internal expansion type flange positioning tool according to claim 4, it is characterised in that: corresponded on the raised line described flexible
The position of mechanism is provided with the second groove placed for the spring.
6. internal expansion type flange positioning tool according to claim 4, it is characterised in that: the section of the second crossbar is in T
Font.
7. internal expansion type flange positioning tool according to claim 1, it is characterised in that: the longitudinally fixed bar, the first cross
Bar, second crossbar material be aluminium alloy.
8. internal expansion type flange positioning tool according to claim 1, it is characterised in that: the longitudinally fixed bar is equipped with handle
Hand；The handrail is fixedly connected on the longitudinally fixed bar.
9. internal expansion type flange positioning tool according to claim 1, it is characterised in that: the first crossbar and second crossbar
Equal length.
10. internal expansion type flange positioning tool according to claim 1, it is characterised in that: the end of the second crossbar is logical
Bolt is crossed to be fixedly connected with the longitudinally fixed bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910304549.2A CN109877517A (en) | 2019-04-16 | 2019-04-16 | A kind of internal expansion type flange positioning tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910304549.2A CN109877517A (en) | 2019-04-16 | 2019-04-16 | A kind of internal expansion type flange positioning tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109877517A true CN109877517A (en) | 2019-06-14 |
Family
ID=66937511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910304549.2A Pending CN109877517A (en) | 2019-04-16 | 2019-04-16 | A kind of internal expansion type flange positioning tool |
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| CN (1) | CN109877517A (en) |
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| CN2606831Y (en) * | 2003-04-26 | 2004-03-17 | 大庆油田建设集团 | Slide block type pipeline flange mouth connector |
| US20160114436A1 (en) * | 2013-05-30 | 2016-04-28 | Acergy France SAS | Internal Line-Up Clamps for Welding Pipes |
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