CN205817061U - Argon-filled protection structure for the welding of long-distance pipe weld seam - Google Patents
Argon-filled protection structure for the welding of long-distance pipe weld seam Download PDFInfo
- Publication number
- CN205817061U CN205817061U CN201620729056.5U CN201620729056U CN205817061U CN 205817061 U CN205817061 U CN 205817061U CN 201620729056 U CN201620729056 U CN 201620729056U CN 205817061 U CN205817061 U CN 205817061U
- Authority
- CN
- China
- Prior art keywords
- weld seam
- argon
- reinforcing plate
- pipeline
- welding
- 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.)
- Active
Links
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The utility model discloses the argon-filled protection structure for the welding of long-distance pipe weld seam; including the appendix being placed in pipe interior; it is provided with packer accessory in described pipeline; weld seam and the pipe interior being positioned at weld seam both sides are completely cut off by described packer accessory, and have multiple pore corresponding with weld seam on appendix.Inventor is by arranging a packer accessory in pipeline, the inner space isolation of weld seam with its two side ducts is opened by i.e. packer accessory, argon is only converged in weld seam surrounding, ensureing while argon is persistently injected in the position of weld seam, by argon amount Consumption Control a less level, to improve the welding effect of weld seam, reduce the cost that long-distance pipe is laid.
Description
Technical field
This utility model relates to the realm of building construction, is particularly used for the argon-filled protection knot of long-distance pipe weld seam welding
Structure.
Background technology
Steel-structure factory building possesses following characteristics, 1, dead load light: refer to steel construction light.In same span, equally
Load under, steel construction is more light than reinforced concrete structure, thus also allow for transport and install.2, reliability is higher (relatively
In other structure)；It is 3, easy to manufacture, easy for installation: the material used by steel construction merely and is to become a useful person, and processes easier,
And can use mechanically actuated, the most substantial amounts of steel construction is usually and makes component, degree of accuracy at specialized hardware
Higher, with then needing formwork erection during armored concrete, prick muscle etc..The welding that is connected by of steel construction connects with bolt, in a short time
The engineering used.4, short construction period: the mechanization manufactured due to steel structure member, automaticity is high, and assembling speed
Hurry up, therefore speed of application is fast, and the cycle is short, can shorten time of completion compared with the Factory Building using reinforced concrete structure.
And the power conduit length of steel-structure factory building is typically more than 4150 meters, and when maintenance, use argon arc welding weldering
Adapter road, owing to pipeline total length is longer, the argon filling form of existing argon arc welding makes argon not to be fully utilized, and causes argon wave
Taking, and cause the butt weld of pipeline second-rate, comprehensive mechanical property is relatively low, if to whole pipe interior argon-filled protection,
Then the demand of argon is excessive.
Utility model content
This utility model purpose is to provide the argon-filled protection structure for the welding of long-distance pipe weld seam, reduces argon
Consumption, improves the welding effect of pipe welding seam simultaneously.
This utility model is achieved through the following technical solutions:
For the argon-filled protection structure of long-distance pipe weld seam welding, including being placed in the appendix of pipe interior, described
Being provided with packer accessory in pipeline, weld seam and the pipe interior being positioned at weld seam both sides are completely cut off by described packer accessory, and open on appendix
There is multiple pore corresponding with weld seam.In prior art, owing to the length of power conduit is longer, need long to many sections when laying
Spend moderate pipe fitting to weld, and use when welding note argon mode to be typically in pipeline and inject, to ensure the weldering of pipeline
Seam welding quality, but the tolerance injecting argon in over distance pipeline is huge, in turn results in being laid to of power conduit
This sharp increase；For avoiding such defect, inventor by arrange in pipeline a packer accessory, i.e. packer accessory by respectively by weld seam with
The inner space isolation of its two side ducts is opened so that argon only converges in weld seam surrounding, is ensureing that the position at weld seam is persistently noted
While entering argon, by argon amount Consumption Control a less level, to improve the welding effect of weld seam, reduce distance
The cost of pipe laying.
Described packer accessory includes that the first reinforcing plate being arranged on appendix and matching with internal diameter of the pipeline and second is strengthened
Plate, weld seam and the pipe interior being positioned at weld seam both sides are completely cut off by the first reinforcing plate, the second reinforcing plate respectively.Inventor is by pipe
Arranging a local seal in road, the i.e. first reinforcing plate and the second reinforcing plate are by respectively by the inside of weld seam Yu its two side ducts
Space isolation is opened so that argon only converges in weld seam surrounding, is ensureing while argon is persistently injected in the position of weld seam, by argon
Tolerance Consumption Control is a less level, to improve the welding effect of weld seam, reduces the cost that long-distance pipe is laid.
Specifically used mode is as follows: the first reinforcing plate and the second reinforcing plate are placed in the pipe interior of weld seam both sides respectively,
Make to be formed the temporary cavity of an argon in pipeline, to prevent the argon injected from bleeding around in pipeline, now by
Pore on appendix injects argon to temporary cavity so that gather substantial amounts of argon near weld seam, to maintain weld seam to weld
Normal demand；And the spacing between the first reinforcing plate and the second reinforcing plate directly determines the volume of temporary cavity, according to actual feelings
The size of weld seam in condition, in real time both spacing sizes of regulation, to ensure to ensure at most suitable temporary cavity volume
The normal demand of weld seam welding, and then realize reducing the usage amount of argon.
Described packer accessory includes two the first reinforcing plates matching with internal diameter of the pipeline and two the second reinforcing plates, two
Weld seam and the pipe interior being positioned at weld seam both sides are completely cut off by one reinforcing plate and two the second reinforcing plates respectively, and the first circular rubber cushion leads to
Crossing and be bolted between two the first reinforcing plates, the second circular rubber cushion is fixed by screws between two the second reinforcing plates,
And the external diameter of described first circular rubber cushion is more than the external diameter of the first reinforcing plate, the external diameter of the second circular rubber cushion is more than the second reinforcing plate
External diameter.When the first reinforcing plate is laid with the second reinforcing plate, the size of reinforcing plate is usually fixing, can only be for same type
Number pipeline could use, the scope i.e. used is narrower；Therefore, inventor changes the layout of local seal structure, uses two
Individual first reinforcing plate and the second reinforcing plate, and the first circle it is respectively provided with at the middle part of two the first reinforcing plates and two reinforcing plates
Shape rubber cushion and the second circular rubber cushion, and ensure the external diameter external diameter more than the first reinforcing plate of the first circular rubber cushion, the second circular glue
The external diameter of pad, more than the external diameter of the second reinforcing plate, utilizes the flexibility characteristics of circular rubber cushion, at the pipe interior ensureing weld seam both sides
While insulating completely, moreover it is possible to make the first reinforcing plate adapt to the pipeline of all kinds of models with the second reinforcing plate, be greatly improved device
Range.Further, after welding completes, when appendix takes out, the first reinforcing plate and the second reinforcing plate avoid with in pipeline
Wall directly contacts, and utilizes the flexible contact between the first circular rubber cushion and the second circular rubber cushion and inner-walls of duct, reduces the
One reinforcing plate, mutually wearing and tearing between the second reinforcing plate and inner-walls of duct.
Threaded with the first reinforcing plate being located close to described weld seam side in described appendix outlet side, and at appendix
Inside being provided with steel cable, described steel cable one end is connected in the middle part of the first reinforcing plate being located close to described weld seam side, the steel cable other end
Extend to outside pipeline.The position distribution of the weld seam on pipeline is broadly divided into two kinds, i.e. the butt welding of two straight pipelines and straight tube
Road welds with elbow.When two straight pipelines carry out butt welding, the air inlet section of appendix extends through two the second reinforcing plates
With the second circular rubber cushion, the end, outlet side of appendix then be located close to screw thread in the middle part of the first reinforcing plate of described weld seam side
Connecting, and then realize being detachably connected with of give vent to anger end and this first reinforcing plate of appendix, argon is normally sprayed by pore；
And when straight pipeline and elbow welding, the end, outlet side of appendix separates with the first reinforcing plate being located close to weld seam side,
The steel cable being arranged in appendix is then connected with this first reinforcing plate, and argon is sprayed by appendix outlet side and pore,
Welding for weld seam provides protection, and after welding terminates, can be directly by two the first reinforcing plates and the first circle by steel cable
Shape rubber cushion pulls out, to reduce the dismounting difficulty of two the first reinforcing plates.
The outer circle wall of the described first circular rubber cushion is provided with outer wall and projects radially outwardly along the first circular rubber cushion and formed
The wear ring of arc contact surface.In the first reinforcing plate when laying and take out, the outer circle wall of the first circular rubber cushion can be with pipe
Produce sliding friction between the inwall in road, be easily caused the mobile generation skew in pipeline of the first circular rubber cushion, and then cause
The pipe interior sealing property of weld seam both sides lost efficacy, and caused the leakage of argon to increase the consumption of argon；Inventor is first
On the outer circle wall of circular rubber cushion, wear ring is installed, and the outer wall of this wear ring outwardly forms a curved contact
Face, and the material of wear ring is identical with the material of the first circular rubber cushion, all uses quality of rubber materials, moves two the first reinforcing plates
Time, wear ring and inner-walls of duct to contact be linear contact lay, while reducing the first circular rubber cushion moving resistance, moreover it is possible to reduce
The abrasion of the first circular rubber cushion.
Multiple described pores are uniformly distributed along appendix circumference.As preferably, multiple pores are uniform along the circumference of appendix
Distribution so that argon is positive butt welded seam when injection, and provides stable argon output for weld seam when welding, it is ensured that weld seam
Welding effect.
This utility model compared with prior art, has such advantages as and beneficial effect:
1, this utility model is by arranging a local seal in pipeline, and the i.e. first reinforcing plate will with the second reinforcing plate
Respectively the inner space of weld seam with its two side ducts is completely cut off and open so that argon only converges in weld seam surrounding, is ensureing at weld seam
Position persistently inject argon while, by argon amount Consumption Control a less level, imitate improving the welding of weld seam
Really, the cost that long-distance pipe is laid is reduced；
2, this utility model is when straight pipeline and elbow welding, the end, outlet side of appendix be located close to weld seam side
First reinforcing plate separate, the steel cable being arranged in appendix is then connected with this first reinforcing plate, and argon is given vent to anger by appendix
Spraying in end and pore, the welding for weld seam provides protection, and after welding terminates, can be directly by two first by steel cable
Reinforcing plate and the first circular rubber cushion pull-out, to reduce the dismounting difficulty of two the first reinforcing plates；
3, this utility model installs wear ring on the outer circle wall of the first circular rubber cushion, and the outer wall of this wear ring is outside
Highlight and form a curved contact surface, and the material of wear ring is identical with the material of the first circular rubber cushion, all uses rubber
Glue material, when two the first reinforcing plates move, wear ring and inner-walls of duct to contact be linear contact lay, circular reducing by first
While rubber cushion moving resistance, moreover it is possible to reduce the abrasion of the first circular rubber cushion.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by this utility model embodiment, constitutes the one of the application
Part, is not intended that the restriction to this utility model embodiment.In the accompanying drawings:
Fig. 1 is the structural representation of two straight pipeline butt welding；
Fig. 2 is the structural representation of straight pipeline and elbow welding；
Fig. 3 is the structural representation of the first circular rubber cushion.
The parts title of labelling and correspondence in accompanying drawing:
The circular rubber cushion of 1-pipeline, 2-the first reinforcing plate, 3-bolt, 4-first, 41-wear ring, 5-appendix, 6-weld seam,
7-pore, 8-second circular rubber cushion, 9-the second reinforcing plate, 10-steel cable.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and explanation thereof are only used for explaining this
Utility model, is not intended as restriction of the present utility model.
Embodiment 1
As shown in Fig. 1 ~ 3, the present embodiment includes the appendix 5 being placed within pipeline 1, is provided with packing in described pipeline 1
Part, described packer accessory includes that being arranged on described appendix 5 the first reinforcing plate 2 and second matched with pipeline 1 internal diameter strengthens
Plate 9, first reinforcing plate the 2, second reinforcing plate 9 is respectively by weld seam 6 and the internal isolation of pipeline 1 that is positioned at weld seam 6 both sides, and in gas transmission
Multiple pore 7 corresponding with weld seam 6 is had on pipe 5.
Specifically used mode is as follows: the first reinforcing plate 2 and the second reinforcing plate 9 are placed in the pipeline 1 of weld seam 6 both sides respectively
Portion so that form the temporary cavity of an argon in pipeline 1, to prevent the argon injected from bleeding around in pipeline 1, now
Argon is injected to temporary cavity so that gather substantial amounts of argon near weld seam 6, to maintain weld seam by the pore 7 on appendix 5
The normal demand of 6 welding；And the spacing between the first reinforcing plate 2 and the second reinforcing plate 9 directly determines the volume of temporary cavity, root
According to the size of weld seam in practical situation 6, both spacing sizes of regulation in real time, to ensure at most suitable temporary cavity body
Amass the normal demand ensureing that weld seam 6 welds, and then realize reducing the usage amount of argon.
Embodiment 2
As shown in Fig. 1 ~ 3, in described packer accessory, the number of described first reinforcing plate 2 and the second reinforcing plate 9 is two
Individual, two the first reinforcing plates 2 and two the second reinforcing plates 9 respectively by weld seam 6 and the internal isolation of pipeline 1 that is positioned at weld seam 6 both sides,
First circular rubber cushion 4 is fixed between two the first reinforcing plates 2 by bolt 3, and the second circular rubber cushion 8 is fixed by screws in two
Between individual second reinforcing plate 9, and the external diameter of the described first circular rubber cushion 4 is more than the external diameter of the first reinforcing plate 2, the second circular rubber cushion
The external diameter of 8 is more than the external diameter of the second reinforcing plate 9.When the first reinforcing plate 2 and the second reinforcing plate 9 are laid, the size one of reinforcing plate
As be fixing, could can only use for the pipeline 1 of same model, the scope i.e. used is narrower；Therefore, inventor's change office
The layout of portion's seal configuration, uses two first reinforcing plates 2 and the second reinforcing plates 9, and two the first reinforcing plates 2 and two
The middle part of individual reinforcing plate is respectively provided with the first circular rubber cushion 4 and the second circular rubber cushion 8, and ensures the external diameter of the first circular rubber cushion 4
More than the external diameter of the first reinforcing plate 2, the external diameter of the second circular rubber cushion 8, more than the external diameter of the second reinforcing plate 9, utilizes circular rubber cushion
Flexibility characteristics, while pipeline 1 inside ensureing weld seam 6 both sides is insulated completely, moreover it is possible to make the first reinforcing plate 2 add with second
Strong plate 9 adapts to the pipeline 1 of all kinds of model, is greatly improved the range of device.Further, after welding completes, appendix 5 takes out
Time, the first reinforcing plate 2 is avoided with the second reinforcing plate 9 directly contacting with pipeline 1 inwall, utilizes the first circular rubber cushion 4 and second
Flexible contact between circular rubber cushion 8 and pipeline 1 inwall, reduce the first reinforcing plate the 2, second reinforcing plate 9 and pipeline 1 inwall it
Between mutual abrasion.
Embodiment 3
As shown in Fig. 1 ~ 3, in the present embodiment, described appendix 5 outlet side be located close to the first of described weld seam 6 side
Reinforcing plate 2 is threaded, and is provided with steel cable 10 in appendix 5, described steel cable 10 one end be located close to described weld seam 6 side
The first reinforcing plate 2 in the middle part of connect, steel cable 10 other end extends to outside pipeline 1.The position distribution master of the weld seam 6 on pipeline 1
Be divided into two kinds, i.e. the butt welding of two straight pipelines 1 and straight pipeline 1 weld with elbow.When two straight pipelines 1 carry out butt welding
Time, the air inlet section of appendix 5 extends through two second reinforcing plates 9 and the second circular rubber cushion 8, the ends, outlet side of appendix 5
Then threaded with in the middle part of the first reinforcing plate 2 being located close to described weld seam 6 side, and then realize the end of giving vent to anger of appendix 5
With being detachably connected with of this first reinforcing plate 2, argon is normally sprayed by pore 7；And when straight pipeline 1 and elbow welding, defeated
The end, outlet side of trachea 5 separates with the first reinforcing plate 2 being located close to weld seam 6 side, and is arranged on the steel cable in appendix 5
10 are connected with this first reinforcing plate 2, and argon is sprayed by appendix 5 outlet side and pore 7, and the welding for weld seam 6 provides
Protection, and after welding terminates, can directly two the first reinforcing plates 2 and the first circular rubber cushion 4 be pulled out by steel cable 10, with
Reduce the dismounting difficulty of two the first reinforcing plates 2.
Further, the outer circle wall of the described first circular rubber cushion 4 is provided with outer wall along the first circular rubber cushion 4 radially outward
Highlight and form the wear ring 41 of arc contact surface.When laying and take out of the first reinforcing plate 2, the first circular rubber cushion 4
Produce sliding friction between the inwall of outer circle wall meeting and pipeline 1, be easily caused the first circular rubber cushion 4 movement in pipeline 1
Produce and offset, and then cause the pipeline 1 inner sealing performance failure of weld seam 6 both sides, cause the leakage of argon to increase argon
Consumption；Inventor installs wear ring 41 on the outer circle wall of the first circular rubber cushion 4, and the outer wall of this wear ring 41 is to evagination
Go out and form a curved contact surface, and the material of wear ring 41 is identical with the material of the first circular rubber cushion 4, all uses rubber
Glue material, when two the first reinforcing plates 2 move, wear ring 41 and pipeline 1 inwall to contact be linear contact lay, reducing by first
While circular rubber cushion 4 moving resistance, moreover it is possible to reduce the abrasion of the first circular rubber cushion 4.
As preferably, multiple pores 7 are uniformly distributed along the circumference of appendix 5 so that argon is positive butt welded seam 6 when injection,
And provide stable argon output for weld seam 6 when welding, it is ensured that the welding effect of weld seam 6.
Above-described detailed description of the invention, is entered the purpose of this utility model, technical scheme and beneficial effect
One step describes in detail, be it should be understood that and the foregoing is only detailed description of the invention of the present utility model, is not used to limit
Fixed protection domain of the present utility model, all within spirit of the present utility model and principle, any amendment, the equivalent made are replaced
Change, improvement etc., within should be included in protection domain of the present utility model.
Claims (6)
1. for the argon-filled protection structure of long-distance pipe weld seam welding, the appendix (5) internal including being placed in pipeline (1), its
Being characterised by: be provided with packer accessory in described pipeline (1), described packer accessory is by weld seam (6) and the pipeline being positioned at weld seam (6) both sides
(1) internal isolation, and on appendix (5), have multiple pore (7) corresponding with weld seam (6).
Argon-filled protection structure for the welding of long-distance pipe weld seam the most according to claim 1, it is characterised in that: described
Packer accessory includes that being arranged on described appendix (5) the first reinforcing plate (2) and second that is upper and that match with pipeline (1) internal diameter strengthens
Plate (9), the first reinforcing plate (2), the second reinforcing plate (9) are respectively by internal to weld seam (6) and the pipeline (1) being positioned at weld seam (6) both sides
Isolation.
Argon-filled protection structure for the welding of long-distance pipe weld seam the most according to claim 1, it is characterised in that: described
Packer accessory includes two the first reinforcing plates (2) matching with pipeline (1) internal diameter and two the second reinforcing plates (9), two first
Reinforcing plate (2) and two the second reinforcing plates (9) respectively by weld seam (6) and the internal isolation of pipeline (1) that is positioned at weld seam (6) both sides,
First circular rubber cushion (4) is fixed between two the first reinforcing plates (2) by bolt (3), and the second circular rubber cushion (8) passes through screw
It is fixed between two the second reinforcing plates (9), and the external diameter of the described first circular rubber cushion (4) is more than outside the first reinforcing plate (2)
Footpath, the external diameter of the second circular rubber cushion (8) is more than the external diameter of the second reinforcing plate (9).
Argon-filled protection structure for the welding of long-distance pipe weld seam the most according to claim 3, it is characterised in that: described
Threaded with the first reinforcing plate (2) being located close to described weld seam (6) side in appendix (5) outlet side, and in appendix (5)
Inside being provided with steel cable (10), described steel cable (10) one end and the first reinforcing plate (2) middle part being located close to described weld seam (6) side connect
Connecing, steel cable (10) other end extends to pipeline (1) outward.
Argon-filled protection structure for the welding of long-distance pipe weld seam the most according to claim 3, it is characterised in that: described
The outer circle wall of the first circular rubber cushion (4) is provided with outer wall and projects radially outwardly along the first circular rubber cushion (4) and form arc and connect
The wear ring (41) of contacting surface.
Argon-filled protection structure for the welding of long-distance pipe weld seam the most according to claim 1, it is characterised in that: multiple
Described pore (7) is uniformly distributed along appendix (5) circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620729056.5U CN205817061U (en) | 2016-07-12 | 2016-07-12 | Argon-filled protection structure for the welding of long-distance pipe weld seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620729056.5U CN205817061U (en) | 2016-07-12 | 2016-07-12 | Argon-filled protection structure for the welding of long-distance pipe weld seam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205817061U true CN205817061U (en) | 2016-12-21 |
Family
ID=57565396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620729056.5U Active CN205817061U (en) | 2016-07-12 | 2016-07-12 | Argon-filled protection structure for the welding of long-distance pipe weld seam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205817061U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106112231A (en) * | 2016-07-12 | 2016-11-16 | 中国五冶集团有限公司 | Argon-filled protection device is used in a kind of long-distance pipe welding |
| CN108555520A (en) * | 2017-12-28 | 2018-09-21 | 山东豪迈机械制造有限公司 | A kind of positioning device and welding method |
-
2016
- 2016-07-12 CN CN201620729056.5U patent/CN205817061U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106112231A (en) * | 2016-07-12 | 2016-11-16 | 中国五冶集团有限公司 | Argon-filled protection device is used in a kind of long-distance pipe welding |
| CN108555520A (en) * | 2017-12-28 | 2018-09-21 | 山东豪迈机械制造有限公司 | A kind of positioning device and welding method |
| CN108555520B (en) * | 2017-12-28 | 2024-01-09 | 山东豪迈机械制造有限公司 | Positioning device and welding method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106112231A (en) | Argon-filled protection device is used in a kind of long-distance pipe welding | |
| CN205817061U (en) | Argon-filled protection structure for the welding of long-distance pipe weld seam | |
| CN105064412A (en) | Air bag type sealing structure for deformation joint of open trench tunnel | |
| CN206992626U (en) | A kind of assembled cable protecting sleeve | |
| CN104314584A (en) | Assembled type jacking pipe piece structure and assembling method thereof | |
| CN203413285U (en) | Pipeline leak repairing device | |
| CN207762406U (en) | A kind of flexibility slide-in type socket joint connecting tube | |
| CN204481450U (en) | Underground pipe gallery wire rod water repellent component | |
| CN204312088U (en) | A kind of pin-connected panel push pipe tunnel segment structure | |
| CN204785141U (en) | Prefabricated heat preservation plastic conduit of flexible reinforcing | |
| CN215807147U (en) | Gas quick connecting pipe | |
| CN203533027U (en) | Pipe connector | |
| CN202812542U (en) | Double-socket hollow-wall winding pipe joint and connection structure | |
| CN205261117U (en) | Pipeline splashproof structure | |
| CN201803021U (en) | Combustion gas underground inlet pipe | |
| CN204628800U (en) | The butt joint of super large caliber steel-plastic composite pipe site operation | |
| CN204083594U (en) | A kind of lubricator wire terminal assembly | |
| CN207406934U (en) | A kind of prefabricated direct-buried thermal insulation pipe | |
| CN202901697U (en) | Inner and outer coating plastic compound steel pipe with thick-walled stainless steel joints | |
| CN206468913U (en) | A kind of indoor fuel gas wall pipe with pillar | |
| CN205560131U (en) | Thermal -insulated fixed bolster of prefabricated directly -buried steam pipe nanometer | |
| CN205429617U (en) | Compound power cable tubing assembly of plastic steel | |
| CN204081034U (en) | A kind of Integral glass fibre reinforced plastic inspection pit | |
| CN204554158U (en) | A kind of insulation reducer pipe adopting Flange joint | |
| CN211629771U (en) | Combined cable pipeline for power system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |