CN109630757A - Pipeline construction fixes damping device - Google Patents
Pipeline construction fixes damping device Download PDFInfo
- Publication number
- CN109630757A CN109630757A CN201811475576.8A CN201811475576A CN109630757A CN 109630757 A CN109630757 A CN 109630757A CN 201811475576 A CN201811475576 A CN 201811475576A CN 109630757 A CN109630757 A CN 109630757A
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- Prior art keywords
- welded
- rod
- fixed
- pipeline
- damping device
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Classifications
-
- 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
- F16L3/10—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing divided, i.e. with two or more members engaging the pipe, cable or protective tubing
-
- 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
- F16L3/16—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
Abstract
The invention discloses the fixed damping devices of pipeline construction, including support rod, support rod is a kind of hollow structure, and fixed block is welded at the inner bottom surface center of support rod, circular hole is offered at the top center of fixed block along the vertical direction, and is welded with the first telescopic rod at the inner bottom surface center of circular hole, the outer surface of the first telescopic rod is arranged with compression spring, the top of first telescopic rod is welded with U-shaped framework, and the inner surface wall of U-shaped framework is pasted with sponge block.In the present invention, when being set up to pipeline, by the inside that pipeline is placed on to two flexible arc bars, by the elastic force of helical spring, to allow the outer surface for being attached to pipeline of two flexible arc bars tightly, then screw thread is run through by two straight panels by bolt, to make the first curved rod and the second curved rod firmly be fixed, allow to that preferably pipeline is fixed, while when disassembly, it can be more convenient.
Description
Technical field
The present invention relates to pipeline construction technical fields, the in particular to fixed damping device of pipeline construction.
Background technique
It when pipeline is installed, needs to set up it, by Pipe installing on strut, to make pipeline
It fixes in the sky, will not influence the walking of worker, while can preferably utilize to space.
But in the prior art, it when setting up pipeline, needs that now pipeline is fixed, consequently facilitating
Pipeline is attached, but existing fixed form, it is to be fixed by a large amount of screw, to be carried out to pipeline
When erection, a large amount of dismantlement work can be increased to worker, keep worker time-consuming and laborious, meanwhile, in the prior art, right
When pipeline is set up, since pipeline is heavier, when being placed on bracket, pipeline is easily set to generate vibration, and manage
Road is in cylindrical structure, is easy sliding, due to generating vibration, falls pipeline when setting up, to will lead to work
Person comes to harm, and can also make pipeline by breakage, increases cost to construction party.
Summary of the invention
The technical problem to be solved in the present invention is to provide the fixed damping devices of pipeline construction.
In order to solve the above-mentioned technical problem, the technical scheme is that (being suitable for general application) or the present invention use skill
The basic ideas of art scheme are (suitable for concurrent application) the fixed damping devices of pipeline construction, including support rod, the support
Bar is a kind of hollow structure, and fixed block is welded at the inner bottom surface center of support rod, at the top center of the fixed block
Circular hole is offered along the vertical direction, and the first telescopic rod is welded at the inner bottom surface center of circular hole, first telescopic rod
Outer surface is arranged with compression spring, and the top of first telescopic rod is welded with U-shaped framework, the inner surface wall patch of the U-shaped framework
With sponge block, the top of the fixed block is welded with strut at both sides of the edge, and the top sliding of the strut runs through
There is rotating bar, one end of the rotating bar is arranged with gear, and the other end of the rotating bar is arranged with disk, the fixed block
Two side external surfaces are embedded with rubber rods at top edge, and the top of rubber rods close to one end edge screw thread through having
Screw, one end of the rubber rods is fixed with metallic cable, and one end of metallic cable and the outer surface of disk are welded, the support
The two sides inner surface wall of bar offers vertical slots along the vertical direction, and the inner bottom surface of the vertical slots is fixed with pressure along the vertical direction
Contracting spring, a side external surface of the vertical slots are welded with baffle, and a side external surface of the baffle offers along the vertical direction
Sliding mouth, the top of the compressed spring are welded with l-shaped rod, and one end of l-shaped rod extends to the outside of baffle, and l-shaped rod
Outer surface and the inner surface wall sliding of sliding mouth are embedded.
It is as above-mentioned technical proposal to further describe:
There are two the l-shaped rod is arranged altogether, and the top of two l-shaped rods is welded with transverse slat, the bottom centre of the transverse slat
Place is welded with double rows of teeth, there are two the gear is arranged altogether, and the outer surface of two gears respectively with the two sides appearance of double rows of teeth
Face engagement connection.
It is as above-mentioned technical proposal to further describe:
The internal diameter of the gear is equal to the internal diameter of disk.
It is as above-mentioned technical proposal to further describe:
The bottom end of the double rows of teeth is welded with T-type plate, and the bottom of the T-type plate is welded with stretching at both sides of the edge
Spring, there are two the extension spring is arranged altogether, and the bottom end of two extension springs is welded with stripper plate, and stripper plate is outer
The sliding of the inner surface wall of surface and U-shaped framework is embedded.
It is as above-mentioned technical proposal to further describe:
The top of the transverse slat is welded with the second telescopic rod, the outer surface of second telescopic rod at both sides of the edge
It is arranged with air spring, there are two second telescopic rod is arranged altogether, and the top of two the second telescopic rods is welded with round bar.
It is as above-mentioned technical proposal to further describe:
The first curved rod is welded at the top of the round bar, one end of first curved rod is rotatably connected to by hinge
Second curved rod.
It is as above-mentioned technical proposal to further describe:
The inner surface wall of first curved rod and the second curved rod opens up fluted, and the inner surface wall of the groove equidistantly welds
Multiple hollow cylinders are connected to, the inner surface wall of the hollow cylinder is fixed with helical spring, and one end of the helical spring is welded with
Movable plate, and the sliding of the inner surface wall of the outer surface of movable plate and hollow cylinder is embedded, a side external surface center of the movable plate
Place is welded with fixed link, and one end of the fixed link is welded with flexible arc bar.
It is as above-mentioned technical proposal to further describe:
The outer surface of first curved rod and the second curved rod is welded with directly in the horizontal direction close to one end edge
Plate, there are two the straight panel is arranged altogether, and the outer surface thread of two straight panels is through there is bolt.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1: in the present invention, when being set up to pipeline, by the way that pipeline to be placed in two flexible arc bars
Portion, by the elastic force of helical spring, thus allow two flexible arc bars tightly be attached to the outer surface of pipeline, then pass through
Bolt allows to screw thread more through two straight panels so that the first curved rod and the second curved rod be made firmly to be fixed
Good is fixed pipeline, while when disassembly, can be more convenient.
2: in the present invention, when pipeline is placed on inside the first curved rod and the second curved rod, pipeline can generate shake
It is dynamic, so that the second telescopic rod and air spring can be made to be compressed, vibration is transmitted in l-shaped rod by transverse slat, makes l-shaped rod pair
Compressed spring is squeezed, when transverse slat moves down, so that double rows of teeth is moved down, rotation of the double rows of teeth with moving gear, thus
Disk is rotated, makes the pulling metallic cable of disk tightly, rubber rods is pulled, in the stretching for passing through T-type board bottom portion
Spring, which is formed, to be squeezed, and squeezes stripper plate to sponge block, to make U-shaped framework move down, to the first telescopic rod and pressure bullet
Spring, which is formed, to be squeezed, and by multiple damping, so as to preferably eliminate to vibration, prevents pipeline from causing to take off due to vibration
It falls, can preferably protect the personal safety of worker and the normal use of pipeline.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the fixed damping device of pipeline construction；
Fig. 2 is the support rod cutaway view Amplified image of the fixed damping device of pipeline construction；
Fig. 3 is the first curved rod partial cross enlarged drawing of the fixed damping device of pipeline construction.
In figure: 1, support rod；2, strut；3, T-type plate；4, disk；5, gear；6, double rows of teeth；7, air spring；8, second
Telescopic rod；9, round bar；10, the first curved rod；11, bolt；12, straight panel；13, the second curved rod；14, groove；15, flexible arc
Bar；16, transverse slat；17, vertical slots；18, l-shaped rod；19, compressed spring；20, rotating bar；21, metallic cable；22, rubber rods；23, solid
Determine block；24, extension spring；25, stripper plate；26, U-shaped framework；27, compression spring；28, the first telescopic rod；29, sponge block；30,
Baffle；31, hollow cylinder；32, helical spring；33, movable plate；34, fixed link.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing.It should be noted that for
The explanation of these embodiments is used to help understand the present invention, but and does not constitute a limitation of the invention.In addition, disclosed below
The each embodiment of the present invention involved in technical characteristic can be combined with each other as long as they do not conflict with each other.
Pipeline construction fixes damping device, including support rod 1, and support rod 1 is a kind of hollow structure, and support rod 1 is interior
It is welded with fixed block 23 at bottom center, portion, offers circular hole at the top center of fixed block 23 along the vertical direction, and circular hole
The first telescopic rod 28 is welded at inner bottom surface center, the outer surface of the first telescopic rod 28 is arranged with compression spring 27, and first stretches
The top of contracting bar 28 is welded with U-shaped framework 26, and the inner surface wall of U-shaped framework 26 is pasted with sponge block 29, and the top of fixed block 23 is leaned on
Strut 2 is welded at nearly both sides of the edge, through there is rotating bar 20, one end of rotating bar 20 is arranged with for the top sliding of strut 2
Gear 5, the other end of rotating bar 20 are arranged with disk 4, and two side external surfaces of fixed block 23 are embedded at top edge
Rubber rods 22, and the top of rubber rods 22 close to one end edge screw thread through there is screw, one end of rubber rods 22 is fixed with
Metallic cable 21, and one end of metallic cable 21 and the outer surface of disk 4 are welded, the two sides inner surface wall of support rod 1 is equal along the vertical direction
Offer vertical slots 17, the inner bottom surface of vertical slots 17 is fixed with compressed spring 19 along the vertical direction, outside the side of vertical slots 17
Surface is welded with baffle 30, and a side external surface of baffle 30 offers sliding mouth, the top welding of compressed spring 19 along the vertical direction
There is l-shaped rod 18, and one end of l-shaped rod 18 extends to the outside of baffle 30, and the inner surface wall of the outer surface of l-shaped rod 18 and sliding mouth
Sliding is embedded, and when setting up to pipeline, by the way that pipeline to be placed on to the inside of two flexible arc bars 15, passes through spiral shell
Revolve the elastic force of spring 32, thus allow two flexible arc bars 15 tightly be attached to the outer surface of pipeline, then pass through bolt
Screw thread is made it can by 11 through two straight panels 12 so that the first curved rod 10 and the second curved rod 13 be made firmly to be fixed
, can be more convenient preferably pipeline to be fixed, while when disassembly, the first curved rod is placed in pipeline
10 and when the second 13 inside of curved rod, pipeline can generate vibration, so that the second telescopic rod 8 and air spring 7 can be made to carry out
Vibration, is transmitted in l-shaped rod 18 by transverse slat 16, squeezes l-shaped rod 18 to compressed spring 19, under transverse slat 16 by compression
When shifting, so that double rows of teeth 6 be made to move down, rotation of the double rows of teeth 6 with moving gear 5 makes disk 4 so that disk 4 be made to be rotated
Pulling metallic cable 21 tightly, pulls rubber rods 22, is formed and is squeezed in the extension spring 24 by 3 bottom of T-type plate, made
Stripper plate 25 squeezes sponge block 29, to make U-shaped framework 26 move down, to the first telescopic rod 28 and the formation of compression spring 27
It squeezes, by multiple damping, so as to preferably eliminate to vibration, prevents pipeline since vibration causes to fall off, it can
Preferably to protect the personal safety of worker and the normal use of pipeline.
There are two l-shaped rod 18 is arranged altogether, and the top of two l-shaped rods 18 is welded with transverse slat 16, the bottom centre of transverse slat 16
Place is welded with double rows of teeth 6, and gear 5 is altogether there are two settings, and the outer surface of two gears 5 respectively with the two sides appearance of double rows of teeth 6
Face engagement connection, due to moving down for double rows of teeth 6, so that gear 5 is rotated, convenient for disk 4 is rotated, gear 5
Internal diameter is equal to the internal diameter of disk 4, gear 5 can be made to rotate that how many angle will make disk 4 rotates how many angle, so as to more
Good pulls metallic cable 21 by disk 4, is convenient for damping, the bottom end of double rows of teeth 6 is welded with T-type plate 3, the bottom of T-type plate 3
Extension spring 24 is welded at both sides of the edge, there are two the total settings of extension spring 24, and the bottom of two extension springs 24
End is welded with stripper plate 25, and the outer surface of stripper plate 25 and the inner surface wall sliding of U-shaped framework 26 are embedded, and pass through extension spring
24 pairs of stripper plates 25, which are formed, to be squeezed, so as to squeeze stripper plate 25 to sponge block 29, to reach damping
Effect, the top of transverse slat 16 is welded with the second telescopic rod 8 at both sides of the edge, and the outer surface of the second telescopic rod 8 is arranged
There is air spring 7, damping can preferably be carried out to it by the second telescopic rod 8 and air spring 7, the second telescopic rod 8 is set altogether
There are two setting, and the top of two the second telescopic rods 8 is welded with round bar 9, and the top of round bar 9 is welded with the first curved rod 10, the
One end of one curved rod 10 is rotatably connected to the second curved rod 13 by hinge, passes through the first curved rod 10 and the second curved rod 13
Preferably the position of pipeline can be fixed, the inner surface wall of the first curved rod 10 and the second curved rod 13 opens up fluted
14, the inner surface wall of groove 14 is equidistantly welded with multiple hollow cylinders 31, and the inner surface wall of hollow cylinder 31 is fixed with helical spring 32,
One end of helical spring 32 is welded with movable plate 33, and the outer surface of movable plate 33 and the inner surface wall sliding of hollow cylinder 31 are embedding
If being welded with fixed link 34 at a side external surface center of movable plate 33, one end of fixed link 34 is welded with flexible arc bar 15,
Fixed link 34 is formed by the elastic force of helical spring 32 and is squeezed, is squeezed so that fixed link 34 be made to form flexible arc bar 15,
It is close to two flexible arc bars 15 preferably to pipeline, convenient for pipeline is fixed, 10 He of the first curved rod
The outer surface of second curved rod 13 is welded with straight panel 12 close to one end edge in the horizontal direction, and straight panel 12 is provided with two altogether
It is a, and the outer surface thread of two straight panels 12 is through there is bolt 11, it can be preferably to the first curved rod 10 and the second curved rod
13 are locked, and allow to that preferably pipeline is fixed.
Working principle: worker is placed on two flexible arc bars 15 when setting up to pipeline, by pipeline
Inside forms fixed link 34 and squeezes, to make fixed link 34 to two flexible arc bars 15 by the elastic force of helical spring 32
It is formed and is squeezed, so that two flexible arc bars 15 is tightly attached to the outer surface of pipeline, be fixed by bolt 11, to make the first arc
Shape bar 10 and the second curved rod 13 are locked, and convenient for pipeline is fixed, are placed on two flexible arc bars 15 in pipeline
Inside when, vibration can make the second telescopic rod 8 and air spring 7 be formed to squeeze and carry out a damping, carry out transverse slat 16
It moves down, so that double rows of teeth 6 be made to be moved down, the rotation with moving gear 5, the rotation of gear 5 drives the rotation of rotating bar 20, thus
Rotate disk 4, disk 4 is wound metallic cable 21, makes metallic cable 21 that rubber rods 22 be pulled to carry out secondary shock-absorbing, leads to
The extension spring 24 for crossing 3 bottom of T-type plate, which is formed, to be squeezed, to make stripper plate 25 to the formation of sponge block 29 inside U-shaped framework 26
It squeezes, to carry out damping three times, by moving down for U-shaped framework 26, forms the first telescopic rod 28 and compression spring 27 and squeeze,
So as to preferably carry out four dampings, compressed spring 19 is formed by the l-shaped rod 18 of 16 bottom of transverse slat and is squeezed, so as to
To carry out five dampings, by damping effect layer by layer, the vibration that can preferably generate to pipeline is eliminated, and prevents pipeline
Fall, protect the personal safety of worker and the normal use of pipeline.
In conjunction with attached drawing, the embodiments of the present invention are described in detail above, but the present invention is not limited to described implementations
Mode.For a person skilled in the art, in the case where not departing from the principle of the invention and spirit, to these embodiments
A variety of change, modification, replacement and modification are carried out, are still fallen in protection scope of the present invention.
Claims (8)
1. pipeline construction fixes damping device, including support rod, it is characterised in that: the support rod is a kind of hollow structure, and
It is welded with fixed block at the inner bottom surface center of support rod, offers circle along the vertical direction at the top center of the fixed block
Hole, and the first telescopic rod is welded at the inner bottom surface center of circular hole, the outer surface of first telescopic rod is arranged with pressure bullet
Spring, the top of first telescopic rod are welded with U-shaped framework, and the inner surface wall of the U-shaped framework is pasted with sponge block, the fixation
The top of block is welded with strut at both sides of the edge, and the top sliding of the strut, which runs through, rotating bar, the rotating bar
One end be arranged with gear, the other end of the rotating bar is arranged with disk, and two side external surfaces of the fixed block are close to top
Edge is embedded with rubber rods, and the top of rubber rods close to one end edge screw thread through having screw, the rubber rods
One end be fixed with metallic cable, and one end of metallic cable and the outer surface of disk are welded, the two sides inner surface wall edge of the support rod
Vertical direction offers vertical slots, and the inner bottom surface of the vertical slots is fixed with compressed spring along the vertical direction, described vertical
One side external surface of slot is welded with baffle, and a side external surface of the baffle offers sliding mouth, the compression bullet along the vertical direction
The top of spring is welded with l-shaped rod, and one end of l-shaped rod extends to the outside of baffle, and the outer surface of l-shaped rod and sliding mouth is interior
The sliding of table wall is embedded.
2. the fixed damping device of pipeline construction according to claim 1, it is characterised in that: the l-shaped rod is provided with two altogether
It is a, and the top of two l-shaped rods is welded with transverse slat, the bottom center of the transverse slat is welded with double rows of teeth, and the gear is set altogether
There are two setting, and connection is engaged with two side external surfaces of double rows of teeth respectively in the outer surface of two gears.
3. the fixed damping device of pipeline construction according to claim 1, it is characterised in that: the internal diameter of the gear is equal to circle
The internal diameter of disk.
4. the fixed damping device of pipeline construction according to claim 2, it is characterised in that: weld the bottom end of the double rows of teeth
There is T-type plate, the bottom of the T-type plate is welded with extension spring at both sides of the edge, and the extension spring is provided with two altogether
It is a, and the bottom end of two extension springs is welded with stripper plate, and the sliding of the inner surface wall of the outer surface of stripper plate and U-shaped framework is embedding
If.
5. the fixed damping device of pipeline construction according to claim 2, it is characterised in that: the top of the transverse slat is close to two
The second telescopic rod is welded at side edge, the outer surface of second telescopic rod is arranged with air spring, and described second is flexible
There are two bar is arranged altogether, and the top of two the second telescopic rods is welded with round bar.
6. the fixed damping device of pipeline construction according to claim 5, it is characterised in that: be welded at the top of the round bar
One end of first curved rod, first curved rod is rotatably connected to the second curved rod by hinge.
7. the fixed damping device of pipeline construction according to claim 6, it is characterised in that: first curved rod and second
The inner surface wall of curved rod opens up fluted, and the inner surface wall of the groove is equidistantly welded with multiple hollow cylinders, the open circles
The inner surface wall of column is fixed with helical spring, and one end of the helical spring is welded with movable plate, and the outer surface of movable plate and sky
The inner surface wall sliding of heart cylinder is embedded, and is welded with fixed link at a side external surface center of the movable plate, the fixed link
One end is welded with flexible arc bar.
8. the fixed damping device of pipeline construction according to claim 6, it is characterised in that: first curved rod and second
The outer surface of curved rod is welded with straight panel close to one end edge in the horizontal direction, there are two the straight panel is arranged altogether, and two
The outer surface thread of a straight panel, which runs through, bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811475576.8A CN109630757A (en) | 2018-12-04 | 2018-12-04 | Pipeline construction fixes damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811475576.8A CN109630757A (en) | 2018-12-04 | 2018-12-04 | Pipeline construction fixes damping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109630757A true CN109630757A (en) | 2019-04-16 |
Family
ID=66070957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811475576.8A Pending CN109630757A (en) | 2018-12-04 | 2018-12-04 | Pipeline construction fixes damping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109630757A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332373A (en) * | 2019-07-22 | 2019-10-15 | 刘战军 | A kind of oil pipeline elevator |
| CN111853359A (en) * | 2020-07-16 | 2020-10-30 | 李桂华 | Hydraulic engineering erects pipeline support frame fast with scene |
| WO2021227485A1 (en) * | 2020-05-14 | 2021-11-18 | 太仓凯盟精密模具有限公司 | High-pressure pipe hanging frame for coal chemical industry |
| CN113669505A (en) * | 2021-09-28 | 2021-11-19 | 南通蓝铭冷暖设备有限公司 | Fixing equipment for laying hidden floor heating pipeline |
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| JP2000055242A (en) * | 1998-08-10 | 2000-02-22 | Takenaka Komuten Co Ltd | Base isolation coupler support device of facility piping |
| CN206914609U (en) * | 2017-07-07 | 2018-01-23 | 山东交通学院 | A kind of damping device for engine of boat and ship |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332373A (en) * | 2019-07-22 | 2019-10-15 | 刘战军 | A kind of oil pipeline elevator |
| WO2021227485A1 (en) * | 2020-05-14 | 2021-11-18 | 太仓凯盟精密模具有限公司 | High-pressure pipe hanging frame for coal chemical industry |
| CN111853359A (en) * | 2020-07-16 | 2020-10-30 | 李桂华 | Hydraulic engineering erects pipeline support frame fast with scene |
| CN113669505A (en) * | 2021-09-28 | 2021-11-19 | 南通蓝铭冷暖设备有限公司 | Fixing equipment for laying hidden floor heating pipeline |
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Application publication date: 20190416 |