CN107504267A - A kind of apparatus for adjusting position of natural gas line - Google Patents
A kind of apparatus for adjusting position of natural gas line Download PDFInfo
- Publication number
- CN107504267A CN107504267A CN201710614529.6A CN201710614529A CN107504267A CN 107504267 A CN107504267 A CN 107504267A CN 201710614529 A CN201710614529 A CN 201710614529A CN 107504267 A CN107504267 A CN 107504267A
- Authority
- CN
- China
- Prior art keywords
- natural gas
- gas line
- drive rod
- adjusting position
- pedestal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
Abstract
The invention discloses a kind of apparatus for adjusting position of natural gas line, it is characterized in that：Including the pedestal for clamping the detent mechanism of natural gas line and being fixed on ground, height adjustment mechanism is provided with described pedestal, described height adjustment mechanism includes drive rod, slide bar and the latch assembly for drive rod positioning, described drive rod is rotationally connected with pedestal, described drive rod rotational band moving slide-bar moves along the length direction of itself, the one end of described slide bar away from pedestal is connected with detent mechanism, has reached the purpose for being not easy to make natural gas line that leakage or explosion accident occur.
Description
Technical field
The present invention relates to a kind of apparatus for adjusting position for natural gas line.
Background technology
Natural gas is as a kind of efficient, high-quality, cleaning energy, and its purposes is more and more extensive, natural gas in city gas
Use demand amount is continuously increased.The comprehensive utilization of natural gas has caused people widely to pay close attention to.With the construction of substantial amounts of station,
Natural gas line installation is essential pith, and wherein most process pipe is fixed on ground using fixed support
On, during causing use due to uncertain factors such as geology, weathers, ground has differential settlement phenomenon, so as to cause
Natural gas line severe bends deformation, once more than the deformation values allowed, pipeline dielectric leakage or quick-fried may finally be caused
Fried accident.
The content of the invention
In view of the deficienciess of the prior art, the invention reside in a kind of apparatus for adjusting position of natural gas line is provided, lead to
Cross height adjustment mechanism and drive natural gas line movement, natural gas line is not easy severe bends deformation, reach and be not easy initiation and let out
Dew or the purpose of explosion accident.
To achieve the above object, the invention provides following technical scheme：A kind of apparatus for adjusting position of natural gas line,
Including the pedestal for clamping the detent mechanism of natural gas line and being fixed on ground, height is provided with described pedestal
Governor motion, described height adjustment mechanism includes drive rod, slide bar and the latch assembly for drive rod positioning, described
Drive rod is rotationally connected with pedestal, and described drive rod rotational band moving slide-bar moves along the length direction of itself, described cunning
The one end of bar away from pedestal is connected with detent mechanism.
By using above-mentioned technical proposal, when ground produces a certain amount of sedimentation, rotated by drive rod, make slide bar along
The short transverse of pedestal produces slip with pedestal, the detent mechanism on slide bar is moved with the movement of slide bar, you can
Natural gas line is moved along the short transverse of pedestal, then positioned drive rod by latch assembly, make drive rod be not easy because
The Action of Gravity Field of natural gas line and occur arbitrarily to rotate so that natural gas pipe is not susceptible to severe bends deformation, reach
It is not easy the purpose of initiation leakage or explosion accident.
The present invention is further arranged to：Gear is fixed with described drive rod, rack, institute are fixed with described slide bar
The wheel and rack engagement stated is set.
By using above-mentioned technical proposal, drive rod is rotated, gear is rotated with the rotation of drive rod, is then made
Rack can move with moving slide-bar along the short transverse of pedestal, so as to make natural gas line be moved with the movement of slide bar
It is dynamic so that natural gas line is not likely to produce serious deformation, is not easy to trigger leakage or explosion accident.
The present invention is further arranged to：Described drive rod includes the drive section and linkage section of axle center dislocation, described company
Connect section to be rotationally connected with pedestal, connecting rod, described connecting rod one end and cunning away from drive section are hinged with described drive section
The outer wall of bar is hinged.
By using above-mentioned technical proposal, drive rod is set to form crankshaft structure, when linkage section rotates, drive section being capable of edge
The axle center for linkage section is rotated, and then drive section drivening rod is subjected to displacement, and connecting rod band moving slide-bar is moved,
Slide bar is set to drive natural gas line to be moved along the short transverse of pedestal, so as to be not easy to make natural gas line that serious shape occurs
Become, be not easy to cause leakage or explosion accident.
The present invention is further arranged to：Described latch assembly includes triangle lock sleeve, and described triangle lock sleeve slides
It is connected on the outer wall of drive rod, the stopper slot for being embedded the triangle lock sleeve is offered on described pedestal, it is described
Length direction of the drive rod along itself offers link slot, is fixed with the inwall of described triangle lock sleeve described for placing
Contiguous block in link slot.
By using above-mentioned technical proposal, after drive rod rotates a certain angle, by triangle lock sleeve along drive rod
Length direction movement, the end of triangle lock sleeve is embedded in stopper slot, triangle lock sleeve is positioned, meanwhile, pass through company
Block is connect in the positioning action of link slot so that drive rod is not susceptible to rotate, so as to make natural gas line be not easy because of gravity
Larger displacement occurs for effect.
The present invention is further arranged to：Described latch assembly also includes the positioning being threadedly connected on triangle lock sleeve
Bolt, described pilot pin are contradicted with the drive rod and set.
By using above-mentioned technical proposal, after pilot pin passes through triangle lock sleeve, contradict, produce with the outer wall of drive rod
Certain frictional force, by the effect of frictional force, relative movement will be not likely to produce between triangle lock sleeve and drive rod, you can make
Drive rod is not easy to produce larger relative movement because of the gap between contiguous block and link slot, so that natural gas line is not easy
Larger displacement is produced because of Action of Gravity Field.
The present invention is further arranged to：Described slide bar is connected by translation mechanism with detent mechanism, described translation machine
Structure includes the installing plate moved radially along slide bar, and described detent mechanism is fixed on installing plate, and described translation mechanism also wraps
Include the mounting assembly for installing plate positioning.
By using above-mentioned technical proposal, when ground settles, it occur frequently that natural gas line is along horizontal direction
It is mobile, by the setting of translation mechanism, certain displacement can be occurred for radial direction of the detent mechanism along slide bar, you can make natural gas
Pipeline is not easy to occur to reveal or explode compared with large deformation along horizontal direction.
The present invention is further arranged to：Described mounting assembly includes regulating part, elastic component and locating dowel, described peace
Mounting hole is offered in loading board, described regulating part is threadedly coupled with mounting hole, and it is recessed that multiple positioning are offered on described slide bar
Hole, described locating dowel is slidably connected in mounting hole and the inwall with positioning shrinkage pool contradicts, and the elastic component is placed in mounting hole
In and both ends respectively with regulating part, locating dowel contradict.
By using above-mentioned technical proposal, regulating part rotation is subjected to displacement, and makes elastic component that certain deformation occur, and produces bullet
Power, by the effect of elastic force, locating dowel is applied active force to positioning shrinkage pool, and produce certain frictional force, by rubbing
The effect of power is wiped, installing plate is positioned, can then position natural gas line, natural gas line is not susceptible to compared with large deformation,
It is not easy to trigger leakage or explosion accident.
The present invention is further arranged to：Described detent mechanism includes supporting plate, offers and is used in described supporting plate
The placement groove of natural gas line is placed, described supporting plate is connected with installing plate.
By using above-mentioned technical proposal, natural gas line is placed in and placed in groove, by the effect of gravity, made natural
Feed channel is produced toward the power in the middle part of placement groove, so that natural gas line is placed on
The present invention is further arranged to：Described detent mechanism also includes tension band, and one end of described supporting plate offers company
Connect hole, the other end and the tensioning band connection, described tension band one end is around connecting hole and passes through the outer of bonding part and supporting plate
Wall is connected, and the accommodating chamber for clamping natural gas line is formed between described supporting plate and tension band.
By using above-mentioned technical proposal, natural gas line is placed in accommodating chamber, and when pulling tension band, tension band is to day
The outer wall of right feed channel applies toward the active force close to placement groove direction, and produces larger frictional force, passes through frictional force
Natural gas line is stably placed in accommodating chamber by effect, meanwhile, tension band can be positioned by bonding part.
The present invention is further arranged to：Cushion is fixed with the inwall of described accommodating chamber.
By using above-mentioned technical proposal, when tension band applies active force to the outer wall of natural gas line, pass through buffering
The cushioning effect of layer, can make the outer wall of natural gas line produce larger interaction between being not easy and placing the inwall of groove
Power, so as to be not easy to rupture natural gas line.
In summary, the invention has the advantages that：
Natural gas line is placed in accommodating chamber, by the way that drive rod is rotated, slide bar is moved along the short transverse of pedestal, by day
Right feed channel moves with the movement of slide bar, natural gas line is not easy that serious deformation occurs because of settlement of foundation, meanwhile, day
Right feed channel can by translation mechanism moving radially along slide bar, so as to further be not susceptible to natural gas line
Serious deformation, it is not susceptible to leakage or explosion accident.
Brief description of the drawings
Fig. 1 is the external structure schematic diagram of embodiment 1；
Fig. 2 is enlarged drawing at Fig. 1 A；
Fig. 3 is the structural representation for embodying translation mechanism；
Fig. 4 is the attachment structure schematic diagram for embodying installing plate and supporting plate；
Fig. 5 is enlarged drawing at Fig. 4 B；
Fig. 6 is the external structure schematic diagram of embodiment 2；
Fig. 7 is enlarged drawing at Fig. 6 C.
Reference：1st, pedestal；11st, supporting part；12nd, driving section；13rd, plate is placed；131st, stopper slot；2nd, height regulation machine
Structure；21st, slide bar；22nd, latch assembly；23rd, drive rod；24th, guiding bar；25th, guiding groove；221st, triangle lock sleeve；222nd, position
Bolt；223rd, contiguous block；224th, link slot；31st, gear；32nd, rack；4th, translation mechanism；41st, installing plate；42nd, mounting assembly；
421st, regulating part；422nd, elastic component；423rd, locating dowel；43rd, mounting hole；44th, shrinkage pool is positioned；5th, detent mechanism；51st, supporting plate；
511st, connecting hole；512nd, groove is placed；52nd, tension band；521st, band body；522nd, sub- face；523rd, generatrix；61st, drive section；62nd, even
Connect section；63rd, connecting rod；7th, cushion；8th, natural gas line；9th, accommodating chamber.
Embodiment
The present invention will be further described referring to the drawings.
Embodiment 1：A kind of apparatus for adjusting position of natural gas line, as shown in Figure 1 to Figure 2, including pedestal 1, pedestal 1 wrap
Include the supporting part 11 set in cuboid and cylindrical driving section 12.Supporting part 11 and the integrated setting of driving section 12.
Driving section 12 is placed in the top of supporting part 11, and supporting part 11 is fixed on into ground by concrete back to the side of driving section 12
On.Driving section 12 is placed vertically.Slide bar 21 is set in cylinder, is arranged in driving section 12, one on the outer wall of slide bar 21
Body is provided with guiding bar 24, and the length direction of guiding bar 24 be arranged in parallel in the length direction of slide bar 21.In driving section 12
Guiding groove 25 is offered on inwall, guiding bar 24 is slidably connected in the guiding groove 25.
Height adjustment mechanism 2 includes drive rod 23, latch assembly 22 and above-mentioned slide bar 21.Drive rod 23 is in cylinder
Set and be rotationally connected with integrated setting on the placement plate 13 of supporting part 11.Drive rod 23 is horizontal positioned.In drive rod
23 are fixed with a gear 31 close to one end of slide bar 21.A rack 32 is fixed with the outer wall of slide bar 21, rack 32
The length direction of length direction and slide bar 21 be arranged in parallel.Gear 31 and rack 32 are engaged.Latch assembly 22 includes triangulation chain
Tight set 221 and pilot pin 222.A contiguous block 223 is fixed with the inwall of triangle lock sleeve 221.Along drive rod 23
The link slot 224 slided for contiguous block 223 is offered on outer wall.Opened in the side for placing plate 13 towards triangle lock sleeve 221
Provided with the stopper slot 131 that section is triangle.Length direction of the triangle lock sleeve 221 along drive rod 23 is moved and can be embedded
In above-mentioned stopper slot 131, drive rod 23 is positioned.
Screwed hole is offered on the outer wall of triangle lock sleeve 221（Not shown in figure）, pilot pin 222 is bolt, will be fixed
Position bolt 222 positions after passing through the screwed hole with drive rod 23, and caused frictional force positions triangle lock sleeve 221, makes triangulation chain
Tight set 221 is not easy to deviate from from stopper slot 131.
With reference to Fig. 3, the one end of slide bar 21 away from pedestal 1 is provided with translation mechanism 4.Translation mechanism 4 includes the He of installing plate 41
Mounting assembly 42, mounting assembly 42 include regulating part 421, elastic component 422 and locating dowel 423.Installing plate 41 is set in cuboid
Put.Mounting hole 43 is offered on installing plate 41, mounting hole 43 is screwed hole.Regulating part 421 is bolt, and elastic component 422 is bullet
Spring, locating dowel 423 are set in cylinder.Locating dowel 423, elastic component 422 and regulating part 421 are sequentially placed into mounting hole 43
In；At least two positioning shrinkage pools 44 are offered close to one end of installing plate 41 in slide bar 21, these positioning centre ofs sphere of shrinkage pool 44 connect
Into straight line and the length direction of guide rail be arranged in parallel, guide rail is horizontal positioned.
Regulating part 421 is rotated, deforms upon elastic component 422, elastic force is produced, by the effect of elastic force, by locating dowel 423
Act against in positioning shrinkage pool 44, caused frictional force positions installing plate 41.As shown in Figure 4 and Figure 5, set on installing plate 41
There is detent mechanism 5.Detent mechanism 5 includes supporting plate 51 and tension band 52.The side of supporting plate 51 offers a section
Semicircular placement groove 512, by natural gas line（Not shown in figure）It can be positioned in the placement groove 512.Will installation
Plate 41 is back to natural gas line（Not shown in figure）Side be fixed on installing plate 41.
A connecting hole 511 is offered in one end of supporting plate 51, the section of connecting hole 511 is elongated.Tension band 52
For the band body 521 of VELCRO, including sub- face 522, generatrix 523 and strip, sub- face 522 can be bonded on generatrix 523.Son
Face 522 and generatrix 523 are respectively placed in the both sides with body 521, and make sub- face 522 and generatrix 523 be respectively placed in body 521 two
End.One end of tension band 52 is fixed in supporting plate 51, after the other end passes through connecting hole 511, then by generatrix 523 and son
Face 522 bonds, and makes with the accommodating chamber 9 formed between body 521 and supporting plate 51 for clamping natural gas line 8, meanwhile, will be with body
521 surface and natural gas line（Not shown in figure）Outer wall contradict, by natural gas line（Not shown in figure）Positioning.Accommodate
Cushion 7 is fixed with the inwall of chamber 9, cushion 7 is made of rubber.
In summary, in use, drive rod 23 is rotated, by the effect of gear 31 and rack 32, by slide bar 21 toward far
Direction from pedestal 1 is moved, and supporting plate 51 is moved toward vertical direction, is then promoted supporting plate 51, is enable supporting plate 51
It is enough to be moved along horizontal direction, natural gas line 8 is not susceptible to serious deformation, so as to be not susceptible to leak or thing of exploding
Therefore.
Embodiment 2：A kind of apparatus for adjusting position of natural gas line, as shown in Figures 6 and 7, difference with embodiment 1 it
It is in eliminating the setting of gear 31 and rack 32（See Fig. 2）.
Drive rod 23 includes the drive section 61 and linkage section 62 of integrated setting.Drive section 61 and linkage section 62 are in cylinder
Set, and the axle center of drive section 61 and linkage section 62 misplaces.Linkage section 62 is rotatably connected on and placed on plate 13.Connecting rod 63 is in
Strip, one end of connecting rod 63 is hinged in drive section 61, the other end is hinged on the outer wall of slide bar 21.
When being rotatablely connected section 62, axle center of the drive section 61 along linkage section 62 can be driven to be moved, meanwhile, it is capable to
Drivening rod 63 is moved, and makes connecting rod 63 pull slide bar 21 to be moved along the length direction of itself, realizes natural gas line 8
It is mobile, reduce deformation quantity, be not susceptible to leak or explode.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of apparatus for adjusting position of natural gas line, it is characterized in that：Including the localization machine for clamping natural gas line (8)
Structure (5) and the pedestal (1) being fixed on ground, height adjustment mechanism (2), described height are provided with described pedestal (1)
Spending governor motion (2) includes drive rod (23), slide bar (21) and the latch assembly (22) for drive rod (23) positioning, described
Drive rod (23) be rotationally connected with pedestal (1), length of described drive rod (23) the rotational band moving slide-bar (21) along itself
Direction is moved, and the one end of described slide bar (21) away from pedestal (1) is connected with detent mechanism (5).
2. a kind of apparatus for adjusting position of natural gas line according to claim 1, it is characterized in that：Described drive rod
(23) gear (31) is fixed with, rack (32), described gear (31) and rack (32) are fixed with described slide bar (21)
Engagement is set.
3. a kind of apparatus for adjusting position of natural gas line according to claim 1, it is characterized in that：Described drive rod
(23) drive section (61) and linkage section (62), described linkage section (62) for including axle center dislocation are rotationally connected with pedestal (1),
Connecting rod (63), the one end of described connecting rod (63) away from drive section (61) and slide bar (21) are hinged with described drive section (61)
Outer wall be hinged.
4. a kind of apparatus for adjusting position of natural gas line according to Claims 2 or 3, it is characterized in that：Described locking
Component (22) includes triangle lock sleeve (221), and described triangle lock sleeve (221) is slidably connected to the outer wall of drive rod (23)
On, the stopper slot (131) for being embedded the triangle lock sleeve (221), described drive rod are offered on described pedestal (1)
(23) link slot (224) is offered along the length direction of itself, is fixed with and is used on the inwall of described triangle lock sleeve (221)
Place the contiguous block (223) in the link slot (224).
5. a kind of apparatus for adjusting position of natural gas line according to claim 4, it is characterized in that：Described latch assembly
(22) pilot pin (222) being threadedly connected on triangle lock sleeve (221), described pilot pin (222) and the drive are also included
Lever (23), which contradicts, to be set.
6. a kind of apparatus for adjusting position of natural gas line according to claim 5, it is characterized in that：Described slide bar (21)
It is connected by translation mechanism (4) with detent mechanism (5), described translation mechanism (4) includes the peace moved radially along slide bar (21)
Loading board (41), described detent mechanism (5) are fixed on installing plate (41), and described translation mechanism (4) also includes being used to install
The mounting assembly (42) of plate (41) positioning.
7. a kind of apparatus for adjusting position of natural gas line according to claim 6, it is characterized in that：Described mounting assembly
(42) regulating part (421), elastic component (422) and locating dowel (423) are included, described installing plate offers mounting hole on (41)
(43), described regulating part (421) is threadedly coupled with mounting hole (43), and multiple positioning shrinkage pools are offered on described slide bar (21)
(44), described locating dowel (423) is slidably connected in mounting hole (43) and contradicted with the inwall of positioning shrinkage pool (44), the bullet
Property part (422) be placed in mounting hole (43) and both ends contradicted respectively with regulating part (421), locating dowel (423).
8. a kind of apparatus for adjusting position of natural gas line according to claim 7, it is characterized in that：Described detent mechanism
(5) include supporting plate (51), the placement groove for placing natural gas line (8) is offered in described supporting plate (51)
(512), described supporting plate (51) is connected with installing plate (41).
9. a kind of apparatus for adjusting position of natural gas line according to claim 8, it is characterized in that：Described detent mechanism
(5) tension band (52) is also included, one end of described supporting plate (51) offers connecting hole (511), the other end and the tensioning
Band (52) connects, and described tension band (52) one end connects around connecting hole (511) and by bonding part and the outer wall of supporting plate (51)
Connect, the accommodating chamber (9) for clamping natural gas line (8) is formed between described supporting plate (51) and tension band (52).
10. a kind of apparatus for adjusting position of natural gas line according to claim 9, it is characterized in that：Described accommodating chamber
(9) cushion (7) is fixed with inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710614529.6A CN107504267B (en) | 2017-07-25 | 2017-07-25 | Position adjusting device of natural gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710614529.6A CN107504267B (en) | 2017-07-25 | 2017-07-25 | Position adjusting device of natural gas pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107504267A true CN107504267A (en) | 2017-12-22 |
| CN107504267B CN107504267B (en) | 2020-02-14 |
Family
ID=60689548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710614529.6A Expired - Fee Related CN107504267B (en) | 2017-07-25 | 2017-07-25 | Position adjusting device of natural gas pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107504267B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000283332A (en) * | 1999-03-30 | 2000-10-13 | Inax Corp | Piping support |
| CN202646920U (en) * | 2012-07-04 | 2013-01-02 | 中国十七冶集团有限公司 | Rolling rail car type pipeline support |
| CN104728525A (en) * | 2015-02-03 | 2015-06-24 | 成都大漠石油机械有限公司 | Shock-resistant petroleum pipeline fixing base |
| WO2015147682A1 (en) * | 2014-03-28 | 2015-10-01 | Открытое акционерное общество "Акционерная компания по транспорту нефти "Транснефть" (ОАО "АК "Транснефть") | Stationary pipeline support |
| CN206221804U (en) * | 2016-11-25 | 2017-06-06 | 北京华福工程有限公司 | Arrangement for adjusting height and eyelid retractor |
| CN106885048A (en) * | 2015-12-15 | 2017-06-23 | 重庆恬愉石油技术有限公司 | A kind of adjustable petroleum pipeline support frame |
-
2017
- 2017-07-25 CN CN201710614529.6A patent/CN107504267B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000283332A (en) * | 1999-03-30 | 2000-10-13 | Inax Corp | Piping support |
| CN202646920U (en) * | 2012-07-04 | 2013-01-02 | 中国十七冶集团有限公司 | Rolling rail car type pipeline support |
| WO2015147682A1 (en) * | 2014-03-28 | 2015-10-01 | Открытое акционерное общество "Акционерная компания по транспорту нефти "Транснефть" (ОАО "АК "Транснефть") | Stationary pipeline support |
| CN104728525A (en) * | 2015-02-03 | 2015-06-24 | 成都大漠石油机械有限公司 | Shock-resistant petroleum pipeline fixing base |
| CN106885048A (en) * | 2015-12-15 | 2017-06-23 | 重庆恬愉石油技术有限公司 | A kind of adjustable petroleum pipeline support frame |
| CN206221804U (en) * | 2016-11-25 | 2017-06-06 | 北京华福工程有限公司 | Arrangement for adjusting height and eyelid retractor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107504267B (en) | 2020-02-14 |
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