CN110709334A - Protection device for pipeline welding groove - Google Patents
Protection device for pipeline welding groove Download PDFInfo
- Publication number
- CN110709334A CN110709334A CN201780091500.2A CN201780091500A CN110709334A CN 110709334 A CN110709334 A CN 110709334A CN 201780091500 A CN201780091500 A CN 201780091500A CN 110709334 A CN110709334 A CN 110709334A
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- CN
- China
- Prior art keywords
- pipeline
- pipe
- groove
- protection device
- wall
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- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D59/00—Plugs, sleeves, caps, or like rigid or semi-rigid elements for protecting parts of articles or for bundling articles, e.g. protectors for screw-threads, end caps for tubes or for bundling rod-shaped articles
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/28—Scaffolds primarily resting on the ground designed to provide support only at a low height
- E04G1/30—Ladder scaffolds
Abstract
The utility model provides a protection device that pipeline groove to in pipeline transportation, storage and loading and unloading process protected, includes safety cover and quick-opening connecting piece, the safety cover surrounds the tip groove of required protection pipeline, and through quick-opening connecting piece and pipeline sealing connection. The safety cover includes link on apron (1) and the safety cover, the quick-open connecting piece is including fixing link, gasket (4) and the seal part at the pipeline outer wall. The connecting end on the protective cover comprises an upper chuck (2), the connecting end fixed on the outer wall of the pipeline comprises a lower chuck (5), and the sealing component comprises a hoop (3). The inside of the pipe is kept dry by filling nitrogen gas into the pipe, and the nitrogen filling pressure is adjusted by connecting a pressure gauge inside the pipe. The device protects the groove of the pipeline to be welded from collision and abrasion in the processes of transportation, storage, loading and unloading, and also prevents impurities from entering the pipeline to pollute the pipeline; the disassembly is convenient, and the installation workload is reduced; the pipe fitting can be repeatedly disassembled, and can be repeatedly utilized aiming at the same pipe diameter, so that the material is saved.
Description
The invention relates to the technical field of steel pipe end face welding grooves and pipeline internal protection, and aims to prevent pipelines from being damaged and polluted in the processes of transportation, storage, loading and unloading.
In the pipeline transportation engineering of gas and liquid, all pipelines are connected by welding, and in order to ensure that all welded seams are formed between welding parts, the parts to be welded are processed into grooves. Before the steel pipe finally reaches the welding of a construction site, the steel pipe needs to be lifted for many times. The thickness of the slope top of the end groove of the steel pipe is only 1.5mm, and the steel pipe is easy to be damaged by impact in the transportation and lifting processes. In addition, the pipeline is applied to the pipelines of the air separation device and the hydrogen production device, and the interior of the pipeline cannot be polluted. However, during long-distance transportation, the pipelines exposed to the air are easily rusted by moisture or other impurities fall into the pipelines to pollute the pipelines. In order to prevent the interior of the pipeline from being polluted during transportation and prevent the groove from being damaged, a protective device is required to be arranged at the end port of the pipeline after the steel pipe is processed.
The existing protection measures are that a cover plate is directly welded on a bevel of a pipeline, and then nitrogen is filled into the interior of the pipeline, so that the interior of the pipeline is prevented from being polluted in the transportation process. When the pipeline is transported to a welding destination, the cover plate of the pipeline port and the groove are cut off from the pipeline together, and the groove is ground on site again. This solution is not only complicated, time consuming and laborious to operate, but also may cause metal shavings to fall into the already cleaned system connected to the pipe during the process of cutting and regrinding the groove for connecting to other systems.
In the prior art, a lot of devices related to groove protection exist, but most of the devices are of ring body structures, namely, the devices only protect the groove and do not cover the end face of the pipeline, so that the inner wall of the pipeline cannot be protected. Chinese utility model patent CN 200957932Y discloses a plastic steel structure pipe end retainer, which comprises a ring body composed of a cylinder body and an outward flange at one end thereof, and is characterized in that the ring body is formed by compounding a plastic body as the body thereof and a plurality of bent steel sheets arranged therein. The utility model discloses a protection pipe end groove that patent can be good, however, inside the pipe end protective shroud of this utility model was inserted the pipeline by the barrel, the pipeline is inside not sealed, and inside exposes in external environment, rusts easily or receives other pollutions, only is applicable to the pipeline groove that does not have the requirement to the inside clean degree of pipeline and protects.
The invention of the chinese patent application CN 101966889a discloses a light pipe protective cap, which can design a protective cap tightly matched with a pipeline according to the diameter, wall thickness and end slope of the protected pipeline, and plays a role in protecting the pipe end groove and the pipe inner wall. However, the invention has strong pertinence, the protective cap needs to be redesigned when the wall thickness of the pipeline or the gradient of the end surface of the pipeline is changed, in addition, the installation and the disassembly are not convenient and fast enough, and the pipeline is not protected by nitrogen. It can be seen that the prior art has many improvements.
Disclosure of the invention
The invention discloses a pipeline groove protecting device which is used for protecting the inner wall of a pipeline from being polluted in the transportation process and protecting a groove from being collided in the transportation process.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides an install groove protection device on pipeline, includes safety cover and quick-open connecting piece, and wherein the safety cover is in pipeline tip periphery to wrap up pipeline port, the safety cover is fixed in the pipeline outer wall through quick-open connecting piece.
In the invention, the protective cover comprises a cover plate and a connecting end on the protective cover; the quick-opening connecting piece comprises a connecting end, a gasket and a sealing component which are fixed on the outer wall of the pipeline.
Preferably, the connecting end of the protective cap includes an upper chuck, the connecting end fixed to the outer wall of the pipe includes a lower chuck, and the sealing member includes a band.
Preferably, the protective cover is formed by welding an upper chuck and a cover plate, the lower chuck is welded on the outer wall of the pipeline, the welding mode can be fillet welding, a gasket is inserted between the upper chuck and the lower chuck, and the upper chuck and the lower chuck are connected in a sealing mode through a clamping hoop.
In the invention, the connecting end of the protective cover can also adopt an upper flange plate, correspondingly, the connecting end of the outer wall of the pipeline adopts a lower flange plate, and the sealing part adopts a bolt and a nut.
The sealing degree of the interior of the pipeline only needs to ensure that the pressure of the interior surface of the pipeline reaches 0.02Mpa-0.03Mpa after nitrogen is filled.
In the invention, the connecting end fixed on the outer wall of the pipeline is welded on the outer wall of the pipeline near the port of the pipeline, and in order to ensure the welding quality, the distance between two adjacent welding seams cannot be too close, namely the welding seam between the upper surface of the connecting end of the outer wall of the pipeline and the welding seam between the groove at the end part of the pipeline and the part to be welded, so that the distance between the connecting end fixed on the outer wall of the pipeline and the upper surface of the outer wall of the pipeline and the groove at the end.
In the invention, the groove refers to a groove which is processed and assembled into a certain geometric shape at the part to be welded of the pipeline, and the groove is positioned at the end part of the pipeline.
The invention is suitable for pipelines with nominal diameter between DN15 and DN500, and can design protective devices with corresponding size according to the size of the pipeline.
In the invention, in order to ensure that the pipeline is kept dry in the transportation process and the long-term storage process and prevent the pipeline made of metal materials such as carbon steel, aluminum and the like used for equipment such as a hydrogen production device, an air separation device and the like from rusting or being polluted by other materials, nitrogen can be filled into the pipeline, and the method comprises the following specific operations: and sealing and fixing the groove protection device at one end of the pipeline, opening the groove protection device at the other end, filling nitrogen into the pipeline from a valve on a pressure gauge at one end of the pipeline, keeping the reading on the pressure gauge to be 0.02MPa-0.03MPa, and sealing and fixing the groove protection device at the other end after the air in the pipeline is emptied to ensure that the surface pressure in the pipeline is 0.02MPa-0.03 MPa.
In the invention, in order to facilitate the pressure control of the nitrogen gas filled in the pipeline, a joint is welded on the protective cover of the groove protection device, and the pressure gauge penetrates through the joint through the pressure guiding pipe to be connected with the inside of the pipeline.
The technical scheme of the invention has the following positive effects:
1) the groove is protected from damage. In order to ensure the welding quality, the groove must be kept complete and free from collision during transportation. The pipeline groove is surrounded by the invention, so that the groove is prevented from being exposed in an external environment, the pipeline groove is not easy to rust or be polluted by other matters, and the damage of the groove caused by collision in the transportation process is also avoided.
2) The interior of the pipe to be welded is protected from contamination. The invention seals and surrounds the end port of the pipeline, avoids the entry of external impurities, fills nitrogen into the pipeline, exhausts air, keeps dry and prevents the interior of the metal pipeline suitable for equipment such as an air separation device, a hydrogen production device and the like from rusting or being polluted by other matters.
3) Avoiding on-site cutting and groove machining. A to-be-welded pipeline groove protection method in a traditional air separation system is to weld a cover plate on a processed groove of a pipeline, and nitrogen is filled into the pipeline to protect the interior of the pipeline from being polluted. And (3) cutting the end part of the pipeline on site, cutting the cover plate and the original groove, and grinding the groove on site again. The invention adopts the quick-opening connecting piece to seal and fix the protective cover at the port of the pipeline, and the welding can be carried out only by opening the connecting piece and taking down the protective cover on the site. Because the original groove is not used in the invention, and the groove is protected from being damaged in the transportation process, the groove does not need to be machined again, and the welding can be directly carried out on the original groove.
4) Avoiding secondary pollution. The traditional groove protection method needs to cut a pipeline on site, the groove is machined again, metal scraps can fall to the inner wall of the pipeline in the process of cutting and polishing the groove, if the pipeline is connected with other devices, such as a pressure device and the like, the metal scraps can fall into the device, pollution is caused, and the cost of cleaning again is increased.
5) And the field workload is reduced. The groove protection device disclosed by the invention adopts the quick-opening connecting piece, the installation and the disassembly are convenient and quick, and after the pipeline to be welded is transported to the site, the protection device can be quickly taken down and then the welding can be directly carried out, so that a large amount of work is saved.
6) The recycling is realized, and the material is saved. The groove protection device can be repeatedly disassembled, and can be repeatedly used for pipelines to be welded with the same outer diameter.
Brief description of the drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a top view of the present invention;
fig. 3 is a schematic view showing an installation position of the pressure gauge.
Best mode for carrying out the invention
The following further describes embodiments of the present invention with reference to the drawings.
The invention is mainly applied to the protection of the end part bevel of the pipeline in the transportation process, in particular to the situation that the inner wall of the pipeline also needs to be protected, such as the pipeline in an air separation device and a hydrogen production device. The device has higher requirement on the pipeline, and the inside of the pipeline can not rust or be polluted by other matters. The pipelines for transporting gas and liquid need to be connected with each other or with corresponding equipment, generally connected by welding, and in order to ensure the welding quality, the part to be welded needs to be processed into a groove, as shown in 7 in fig. 1. The top of the groove is thin, and if the groove is not protected, the groove is easily damaged in the transportation process, and the welding quality is affected.
The invention provides a groove protection device arranged on a pipeline, which comprises a protection cover and a quick-opening connecting piece, wherein the protection cover is sleeved on the periphery of the end part of the pipeline and wraps the port of the pipeline, and the protection cover is fixed on the outer wall of the pipeline through the quick-opening connecting piece.
The protective cover comprises a cover plate 1 and a connecting end on the protective cover; the quick-opening connecting piece comprises a connecting end fixed on the outer wall of the pipeline, a gasket 4 and a sealing component.
As shown in fig. 1, it is preferable that the connection end of the protective cap includes an upper chuck 2, the connection end fixed to the outer wall of the pipe includes a lower chuck 5, and the sealing member includes a band 3.
Preferably, the protective cover is formed by welding the cover plate 1 and the upper chuck 2, the lower chuck 5 is welded on the outer wall of the pipeline 6, the welding mode can be sealing fillet welding, a gasket 4 is inserted between the upper chuck 2 and the lower chuck 5, and the upper chuck 2 and the lower chuck 5 are connected in a sealing mode through the clamping hoop 3.
In the invention, the connecting end on the protective cover can also adopt an upper flange plate, correspondingly, the connecting end fixed on the outer wall of the pipeline adopts a lower flange plate, and the sealing part adopts a bolt and a nut.
Fig. 2 is a plan view of embodiment 1, showing the cover plate 1, the clip 3, the clip bolt 31, and the clip nut 32.
In example 1, the distance from the groove 7 to the upper surface of the outer wall of the pipe 6 to which the lower chuck 5 is welded is 50mm or more. In order to ensure the welding quality, the welding device is far away from a heat affected zone of a welding seam, enough welding operation space is reserved, the distance between two adjacent welding seams cannot be too short, namely, the distance between the welding seam between the upper surface of the connecting end of the outer wall of the pipeline and the welding seam between the groove at the end part of the pipeline and the part to be welded cannot be too short. If the spacing between the welds is too small, the strength of the previous weld may be compromised during welding.
In example 1, the nominal diameter of the protected conduit 6 ranges approximately from DN15 to DN500, and a correspondingly sized protection device can be designed according to the size of the desired protected conduit.
In example 1, in order to ensure that the pipeline remains dry during transportation and to prevent rusting and other contamination of the steel pipe, a suitable amount of nitrogen gas may be introduced into the pipeline. The specific operation is as follows: and sealing and fixing the groove protection device at one end of the pipeline, opening the groove protection device at the other end, filling nitrogen into the pipeline from a valve on a pressure gauge at one end of the pipeline, keeping the reading on the pressure gauge to be 0.02MPa-0.03MPa, and sealing and fixing the groove protection device at the other end after the air in the pipeline is emptied to ensure that the surface pressure in the pipeline is 0.02MPa-0.03 MPa.
As shown in fig. 3, in embodiment 1, in order to facilitate the pressure control of the nitrogen gas filled in the pipe, a joint is provided on the protection cover of the groove protection device, and a pressure gauge 8 is connected to the inside of the pipe by passing through the joint through a pressure introduction pipe 9.
The quick-opening connecting piece in the invention refers to a connecting piece which can be quickly installed and disassembled, such as a chuck, a hoop and a gasket, a flange, a bolt, a nut and other structures, and the quick-opening connecting pieces not only are simple and convenient to disassemble and assemble, but also can be repeatedly used.
The invention is not only suitable for the situation that the pipeline groove needs to be protected, but also suitable for the situation that the interior of the pipeline needs to be sealed and is not polluted by impurities. The invention is not limited to the protection of the pipe groove and the inner wall in the transportation process, and is also suitable for long-term placement.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the embodiments, for example, the quick-opening connector is not limited to the chuck and the clamp, and the flange structure mentioned in the present invention, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and variations can be made by persons skilled in the art without departing from the principles of the invention.
Claims (10)
- The utility model provides an install groove protection device in pipeline tip, includes safety cover and quick-opening connecting piece, its characterized in that, the safety cover is peripheral at the pipeline tip to live pipeline port parcel, the safety cover is fixed in the pipeline outer wall through quick-opening connecting piece.
- Groove protection device according to claim 1, characterized in that the protective cover comprises a cover plate (1) and a connecting end on the protective cover; the quick-opening connecting piece comprises a connecting end, a gasket and a sealing component which are fixed on the outer wall of the pipeline.
- Groove protection device according to claim 2, characterized in that the connection end on the protective cover comprises an upper chuck (2), the connection end fixed to the outer wall of the pipe comprises a lower chuck (5), and the sealing means comprise a clamping band (3).
- The groove protection device of claim 2, wherein the connecting end on the protective cover comprises an upper flange, the connecting end on the outer wall of the pipe comprises a lower flange, and the sealing member comprises a bolt and a nut.
- Groove protection device according to claim 3, characterized in that the protective cover is formed by welding a cover plate (1) and an upper chuck (2), the lower chuck (5) is fillet welded to the outer wall of the pipe (6) in a sealing manner, a gasket is inserted between the upper chuck (2) and the lower chuck (5), and the upper chuck (2) and the lower chuck (5) are connected in a sealing manner by a clamping hoop (3).
- The groove protection device according to claim 2, wherein the joint end fixed to the outer wall of the pipe is welded to the upper surface of the outer wall of the pipe at a distance of 50mm or more from the groove (7) at the end of the pipe.
- Groove protection device according to claim 1, characterized in that the nominal diameter of the groove protection device suitable pipe (6) is between DN15 and DN 500.
- Groove protection device according to claim 1, characterized in that a joint is welded on the protective cover, through which joint the pressure gauge (8) is connected to the inside of the pipe by means of a pressure guiding tube (9).
- The groove protection device of claim 1, wherein the interior of the pipeline is filled with nitrogen during transportation of the pipeline and during long-term storage of the pipeline.
- The groove protection device of claim 9, wherein the relative pressure inside the pipe is maintained at 0.02MPa to 0.03MPa after the nitrogen gas is introduced.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/087251 WO2018223277A1 (en) | 2017-06-06 | 2017-06-06 | Protection apparatus for pipe welding bevel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110709334A true CN110709334A (en) | 2020-01-17 |
Family
ID=64566065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780091500.2A Pending CN110709334A (en) | 2017-06-06 | 2017-06-06 | Protection device for pipeline welding groove |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110709334A (en) |
| WO (1) | WO2018223277A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484108B (en) * | 2022-01-28 | 2024-03-12 | 重庆川仪调节阀有限公司 | Protection device and protection method for sealing surface and welding groove |
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| US6363973B1 (en) * | 1999-09-24 | 2002-04-02 | Dockweiler Gmbh | Device for closing a pipe at its end side |
| US6520212B1 (en) * | 1999-07-30 | 2003-02-18 | Legris S.A. | Protective end cap for tube end |
| JP2004075110A (en) * | 2002-08-15 | 2004-03-11 | Shin Etsu Polymer Co Ltd | Protective cap for vinyl chloride propulsion pipe and packaging pattern of vinyl chloride propulsion pipe using protective cap |
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| WO2010091228A1 (en) * | 2009-02-09 | 2010-08-12 | Protective Industries, Inc. | Closed end cap for industrial pipes |
| CN201864165U (en) * | 2010-11-19 | 2011-06-15 | 沪东中华造船(集团)有限公司 | Blind flange used for sealing pipe |
| CN202914963U (en) * | 2012-10-09 | 2013-05-01 | 中船澄西船舶修造有限公司 | Pumping pressure special tooling for bubble-detecting oblique incision pipe |
| CN203809948U (en) * | 2014-04-21 | 2014-09-03 | 成都杰森输配设备实业有限公司 | Novel sealing and connecting structure for pipeline and plug |
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| CN105423057A (en) * | 2015-12-24 | 2016-03-23 | 哈尔滨锅炉厂有限责任公司 | Companion flange protective device and protective method |
| CN205976567U (en) * | 2016-07-19 | 2017-02-22 | 中建钢构有限公司 | Steel column top flat slope mouth protection device |
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| JP2001199469A (en) * | 2000-01-14 | 2001-07-24 | Sumitomo Metal Ind Ltd | Tube end protector |
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| AR062440A1 (en) * | 2007-08-21 | 2008-11-05 | Siderca Sa Ind & Com | A PROTECTIVE DEVICE FOR THE END OF TUBULAR ELEMENTS (T), PREFERENTLY PIPES FOR THE PETROLEUM INDUSTRY, OCTG, "LINE PIPES" AND THE SIMILAR ". |
| US20100200102A1 (en) * | 2009-02-09 | 2010-08-12 | Zeyfang Frederick W | Two-piece pipe end cap |
| CN104369977B (en) * | 2014-10-31 | 2017-09-26 | 哈尔滨朗格斯特节能科技有限公司 | Prefabricated direct-buried thermal insulation pipe working steel tube groove protector and and groove guard method |
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2017
- 2017-06-06 CN CN201780091500.2A patent/CN110709334A/en active Pending
- 2017-06-06 WO PCT/CN2017/087251 patent/WO2018223277A1/en active Application Filing
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|---|---|---|---|---|
| FR2482697A1 (en) * | 1980-05-16 | 1981-11-20 | Linde Ag | CLOSURE FOR THE END OF A TUBE |
| US6520212B1 (en) * | 1999-07-30 | 2003-02-18 | Legris S.A. | Protective end cap for tube end |
| US6363973B1 (en) * | 1999-09-24 | 2002-04-02 | Dockweiler Gmbh | Device for closing a pipe at its end side |
| JP2004075110A (en) * | 2002-08-15 | 2004-03-11 | Shin Etsu Polymer Co Ltd | Protective cap for vinyl chloride propulsion pipe and packaging pattern of vinyl chloride propulsion pipe using protective cap |
| US20060266428A1 (en) * | 2005-05-27 | 2006-11-30 | Siderca Saic | Tubular element end protector and tubular element comprising same |
| WO2010091228A1 (en) * | 2009-02-09 | 2010-08-12 | Protective Industries, Inc. | Closed end cap for industrial pipes |
| CN201864165U (en) * | 2010-11-19 | 2011-06-15 | 沪东中华造船(集团)有限公司 | Blind flange used for sealing pipe |
| CN202914963U (en) * | 2012-10-09 | 2013-05-01 | 中船澄西船舶修造有限公司 | Pumping pressure special tooling for bubble-detecting oblique incision pipe |
| CN203809948U (en) * | 2014-04-21 | 2014-09-03 | 成都杰森输配设备实业有限公司 | Novel sealing and connecting structure for pipeline and plug |
| CN204197595U (en) * | 2014-11-10 | 2015-03-11 | 周福义 | Plug swing pipe protector in pipe groove |
| CN204957287U (en) * | 2015-05-25 | 2016-01-13 | 温州科技职业学院 | Steel pipe groove protector |
| CN105423057A (en) * | 2015-12-24 | 2016-03-23 | 哈尔滨锅炉厂有限责任公司 | Companion flange protective device and protective method |
| CN205976567U (en) * | 2016-07-19 | 2017-02-22 | 中建钢构有限公司 | Steel column top flat slope mouth protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018223277A1 (en) | 2018-12-13 |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20200117 |