CN111390413A - Inflation protection device for pipeline welding and pipeline welding method - Google Patents
Inflation protection device for pipeline welding and pipeline welding method Download PDFInfo
- Publication number
- CN111390413A CN111390413A CN202010173789.6A CN202010173789A CN111390413A CN 111390413 A CN111390413 A CN 111390413A CN 202010173789 A CN202010173789 A CN 202010173789A CN 111390413 A CN111390413 A CN 111390413A
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- CN
- China
- Prior art keywords
- inflation
- end cover
- protection device
- welded
- connecting piece
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
- B23K31/027—Making tubes with soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
Abstract
The invention discloses an inflation protection device for pipeline welding and a pipeline welding method, wherein the inflation protection device comprises: the air inlet channel is communicated with an external pipeline through the opening; the connecting piece is arranged in the first end cover and the second end cover in a penetrating mode, the first end cover is connected to the connecting end, the second end cover is detachably connected to the detachable end, the first end cover and the second end cover are respectively used for covering two end portions of a pipeline to be welded, an inflation hole is formed in the connecting piece, the inflation hole is located between the first end cover and the second end cover, and therefore inert gas is filled into the pipeline to be welded. The inflation protection device is characterized in that the first end cover and the second end cover are arranged at the end parts of the pipelines to be welded through the connecting piece, one end cover can be detached, the pipelines to be welded can be conveniently installed and detached, the protection device can be repeatedly used, and economic benefits are improved.
Description
Technical Field
The invention relates to an inflation protection device for pipeline welding and a pipeline welding method.
Background
When a copper-nickel alloy pipe and a stainless steel pipe are welded, in order to avoid surface oxidation of a welding seam inside the pipeline and ensure various performances of a welding joint, two ends of the pipeline need to be sealed, and then inert gas is filled into the pipeline to perform gas protection on the welding seam inside the pipeline. Before welding, the welding can be carried out only after the purity of the inert gas in the pipeline is required to be detected to reach the standard, generally, the oxygen content in the copper-nickel alloy pipeline is less than 0.05 percent to reach the standard value, and the oxygen content in the stainless steel pipeline is less than 0.08 percent to reach the standard value. At present, the method of filling inert gas into a pipe to be welded is to seal two ends of the pipe to be welded with a paper tape or sponge, insert an inflation tube into a hole at one end of the pipe and fill the pipe with inert gas, and protect a weld joint with the inert gas. This method consumes materials such as adhesive tape and sponge, which cannot be reused, resulting in a certain loss of materials, and takes a lot of time for both pre-weld preparation and post-weld cleaning. Thus, the process is time consuming, laborious and highly uneconomical.
Disclosure of Invention
The invention aims to overcome the defects that an inflation protection device for pipeline welding in the prior art cannot be reused and the preparation time before welding is long, and provides the inflation protection device for pipeline welding and a pipeline welding method.
The invention solves the technical problems through the following technical scheme:
an inflatable protection device for pipe welding, the inflatable protection device comprising:
the air inlet device comprises a connecting piece, a connecting piece and a connecting piece, wherein one end of the connecting piece is a connecting end, the other end of the connecting piece is a detachable end, an air inlet channel is arranged inside the connecting piece, the connecting end is provided with an opening, and the air inlet channel is communicated with an external pipeline through the opening;
the connecting piece penetrates through the first end cover and the second end cover, the first end cover is connected to the connecting end, the second end cover is detachably connected to the detachable end, the first end cover and the second end cover are respectively used for covering two end portions of a pipeline to be welded, an inflation hole communicated with the air inlet channel is formed in the outer peripheral surface of the connecting piece, and the inflation hole is located between the first end cover and the second end cover and used for filling inert gas into the pipeline to be welded.
In this embodiment, the inert gas is preferably argon. The inflation protection device is characterized in that the first end cover and the second end cover are arranged at the end parts of the pipelines to be welded through the connecting piece to form a certain sealing effect, one end cover can be detached, the pipelines to be welded can be conveniently installed and detached, the protection device can be repeatedly used, and economic benefits are improved.
Preferably, the first end cap is fixedly connected to the connecting end, the detachable end is provided with a threaded portion, the second end cap is provided with a threaded hole, and the second end cap is in threaded connection with the threaded portion through the threaded hole.
In this scheme, second end cover threaded connection is on screw thread portion to first end cover fixed connection is on the connecting piece, consequently, when dress, unload and treat the welded pipe, and is simple and convenient, has reduced the preparation time before the pipeline welding, has improved work efficiency. In other alternatives, the first end cap may be removably coupled to the connector as desired.
Preferably, the first end cap is fixedly connected to the connecting end, the detachable end is provided with a threaded portion, the second end cap is provided with a through hole, the inflation protection device further comprises a fastener, and the threaded portion penetrates through the through hole and is in threaded connection with the fastener.
In this scheme, the fastener is the nut, and the second end cover compresses tightly at the tip of treating the welded tube way through the nut, easy dismounting.
Preferably, the number of the inflation holes is multiple, and the multiple inflation holes are arranged at intervals along the length direction of the connecting piece.
In this scheme, along a plurality of inflation holes that the length direction interval of connecting piece set up, the air in the pipeline of treating welding can be discharged fast, avoids treating to have the dead angle in the pipeline of treating welding to the oxygen content in the pipeline of treating welding reaches the standard value fast, improves work efficiency.
Preferably, the inflation protection device further comprises a support seat, and the upper end of the support seat is connected to the outer side of the first end cover.
In this scheme, this aerify protection device supports through the support seat, only needs during the use to treat that welded pipe overlaps on the connecting piece, need not to set up additional bearing structure again, has simplified operating procedure, has improved work efficiency.
Preferably, the inflation protection device further comprises a support seat, and the upper end of the support seat is connected to the outer peripheral surface of the connecting end and located outside the first end cover.
Preferably, the inflation protection device further comprises an inflation fitting connected to the opening for connection with the external conduit.
In this scheme, set up and aerify the outside gas tube way that connects can be used to realize the high-speed joint, improve work efficiency.
Preferably, the first end cap and the second end cap are both circular in shape.
In this scheme, circular shape end cover adaptation is in the shape of waiting to weld the pipeline, save material, convenient to use.
A welding method of pipelines utilizes the inflatable protection device for pipeline welding, and comprises the following steps:
s1, sequentially enabling the detachable end of the connecting piece to penetrate through the two pipelines to be welded, connecting the second end cover to the detachable end, and finally respectively covering the first end cover and the second end cover at two ends of the pipelines to be welded;
and S2, connecting and communicating the external pipeline with the opening, and filling inert gas into the pipeline to be welded through the gas filling hole.
In the scheme, the inflation protection device is a standard tool, and the early preparation work can be completed by only two steps, so that the early preparation time is shortened, the operation steps are simplified, and the work efficiency is greatly improved.
Preferably, after the step S1, the two pipes to be welded are tack-welded. The pipeline to be welded is pre-fixed through positioning welding, welding quality is improved, and finally complete welding is carried out.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: the inflation protection device is characterized in that the first end cover and the second end cover are arranged at the end parts of the pipelines to be welded through the connecting piece to form sealing, one end cover can be detached, the pipelines to be welded can be conveniently installed and detached, the protection device can be repeatedly used, and economic benefits are improved. Meanwhile, the inflation protection device is simple in structure and is a standard tool, and operation steps in the early stage and the later stage are reduced, so that preparation time in the early stage and the later stage is saved, and working efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of an inflation protection device for pipe welding according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of an inflation protection device for pipeline welding according to embodiment 2 of the present invention.
Fig. 3 is a schematic structural diagram of a use state of the inflation protection device for pipeline welding according to embodiment 2 of the invention.
Fig. 4 is a flowchart of a welding method of pipes according to embodiment 1 of the present invention.
Description of reference numerals:
to-be-welded pipe 90
Connecting piece 1, connecting end 1a and detachable end 1b
Threaded portion 12
Supporting seat 4
Gas-filled joint 5
Fastener 6
Detailed Description
The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.
Example 1
As shown in fig. 1, the present invention discloses an inflation protection device for pipeline welding, which comprises: the air inlet pipe comprises a connecting piece 1, wherein one end of the connecting piece 1 is a connecting end 1a, the other end of the connecting piece 1 is a detachable end 1b, an air inlet channel is arranged inside the connecting piece 1, the connecting end 1a is provided with an opening, and the air inlet channel is communicated with an external pipeline through the opening; first end cap 2 and second end cap 3, first end cap 2 and second end cap 3 are worn to locate by connecting piece 1, first end cap 2 is connected in link 1a, second end cap 3 detachably connects in removable end 1b, first end cap 2 and second end cap 3 are used for respectively covering and establish the both ends of treating welding pipeline 90, be provided with on the outer peripheral face of connecting piece 1 and communicate in inlet channel's gas filling hole 11, and gas filling hole 11 is located between first end cap 2 and second end cap 3, for wait to weld and fill into inert gas in pipeline 90.
In the embodiment, the inert gas is preferably argon gas, the first end cap 2 and the second end cap 3 are covered at two ends of the pipeline 90 to be welded through the connecting piece 1, but both have small gaps, when the inert gas is filled into the pipeline 90 to be welded through the vent hole on the connecting piece 1, the air in the pipeline 90 to be welded can be discharged through the gaps, meanwhile, the inner weld joint of the pipeline 90 to be welded is protected by the inert gas, and the welding quality of the weld joint is improved. The second end cover 3 is detachably connected to the connecting piece 1, so that the pipeline 90 to be welded is convenient to mount and dismount, the protection device can be repeatedly used, and the economic benefit is improved.
In addition, the first end cap 2 is fixedly connected to the connecting end 1a of the connecting member 1, the detachable end 1b of the connecting member 1 is provided with a threaded portion 12, the second end cap 3 is provided with a threaded hole, and the second end cap 3 is in threaded connection with the threaded portion 12 through the threaded hole. The second end cap 3 is screwed on the screw thread part 12, and the first end cap 2 is fixedly connected on the connecting piece 1, so that when the pipeline 90 to be welded is assembled and disassembled, the operation is simple and convenient, the preparation time before pipeline welding is reduced, and the working efficiency is improved. In other alternative embodiments, the first end cap 2 and the connecting member 1 may be detachably connected as desired.
Wherein, the number of the inflation holes 11 is a plurality, and the plurality of inflation holes 11 are arranged at intervals along the length direction of the connecting piece 1. The plurality of air inflation holes 11 arranged at intervals along the length direction of the connecting piece 1 can quickly exhaust air in the pipeline 90 to be welded, so that dead angles in the pipeline 90 to be welded are avoided, the oxygen content in the pipeline 90 to be welded reaches a standard value, and the working efficiency is improved.
On the basis, the inflation protection device also comprises a supporting seat 4, and the upper end of the supporting seat 4 is connected to the outer side of the first end cover 2. This aerify protection device supports through support seat 4, only needs during the use to treat that welded pipe 90 overlaps on connecting piece 1, compresses tightly through first end cover 2 and second end cover 3, need not to set up extra bearing structure again, has simplified operating procedure, has improved work efficiency.
In addition, the inflation protection device further comprises an inflation nipple 5, the inflation nipple 5 being connected to the opening for connection with an external pipe. The arrangement of the inflation connector 5 can be used for realizing quick connection of an external inflation pipeline, and the working efficiency is improved.
The first end cap 2 and the second end cap 3 are both circular in shape. The circular end cover is adapted to the shape of the pipeline 90 to be welded, so that the material is saved, and the use is convenient.
As shown in FIG. 4, the invention also discloses a welding method of pipelines, which utilizes the inflatable protection device for pipeline welding, and comprises the following steps:
step S1, sequentially penetrating the detachable end 1b of the connecting piece 1 through two pipelines to be welded, connecting the second end cover 3 to the detachable end 1b, and finally respectively covering the first end cover 2 and the second end cover 3 on two end parts of the pipeline to be welded 90; and step S2, connecting and communicating the external pipeline with the opening, and filling inert gas into the pipeline to be welded through the gas filling hole 11. The inflation protection device is a standard tool, and can complete early-stage preparation work only by two steps, so that the early-stage preparation work time is reduced, the processing time after pipeline welding is correspondingly reduced, the operation steps are simplified, and the work efficiency is improved.
After step S1, the two pipes to be welded 90 are tack welded. In this embodiment, the pipe 90 to be welded is pre-fixed by tack welding, which improves the positioning accuracy of the pipe to be welded.
Example 2
As shown in fig. 2 and fig. 3, the structure of the present embodiment is substantially the same as that of embodiment 1, except that: the first end cover 2 is fixedly connected to the connecting end 1a, the detachable end 1b is provided with a threaded portion 12, the second end cover 3 is provided with a through hole, the inflation protection device further comprises a fastener 6, and the threaded portion 12 penetrates through the through hole and is in threaded connection with the fastener 6. In this embodiment, the fastening member 6 is a nut, and the second end cover 3 is pressed against the end of the pipe 90 to be welded by the nut, so that the assembly and disassembly are convenient.
The upper end of the support base 4 is connected to the outer circumferential surface of the connection end 1a of the connection member 1 and is positioned outside the first end cap 2. This aerify protection device supports through support seat 4, only needs during the use to treat that welded pipe 90 overlaps on connecting piece 1, compresses tightly through first end cover 2 and second end cover 3, need not to set up extra bearing structure again, has simplified the step of preparing earlier stage, has improved work efficiency.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. An inflation protection device for pipe welding, the inflation protection device comprising:
the air inlet device comprises a connecting piece, a connecting piece and a connecting piece, wherein one end of the connecting piece is a connecting end, the other end of the connecting piece is a detachable end, an air inlet channel is arranged inside the connecting piece, the connecting end is provided with an opening, and the air inlet channel is communicated with an external pipeline through the opening;
the connecting piece penetrates through the first end cover and the second end cover, the first end cover is connected to the connecting end, the second end cover is detachably connected to the detachable end, the first end cover and the second end cover are respectively used for covering two end portions of a pipeline to be welded, an inflation hole communicated with the air inlet channel is formed in the outer peripheral surface of the connecting piece, and the inflation hole is located between the first end cover and the second end cover and used for filling inert gas into the pipeline to be welded.
2. The inflation protection device of claim 1, wherein the first end cap is fixedly attached to the attachment end, the removable end is provided with a threaded portion, the second end cap is provided with a threaded aperture, and the second end cap is threadably attached to the threaded portion via the threaded aperture.
3. The inflation protection device of claim 1, wherein the first end cap is fixedly attached to the attachment end, the detachable end is provided with a threaded portion, the second end cap is provided with a through hole, and the inflation protection device further comprises a fastener, wherein the threaded portion is threaded to the fastener through the through hole.
4. The inflation protection device for pipe welding of claim 1, wherein the number of the inflation holes is plural, and the plural inflation holes are arranged at intervals along the length direction of the connector.
5. The inflation protector for pipe welding of claim 1, further comprising a support base, an upper end of the support base being attached to an outer side of the first end cap.
6. The inflation protector for pipe welding of claim 1, further comprising a support base having an upper end connected to an outer circumferential surface of the connection end and located outside the first end cap.
7. The inflation protection device of claim 1, further comprising an inflation fitting connected to the opening for connection to the external conduit.
8. The inflation protection device of any one of claims 1-7, wherein the first end cap and the second end cap are both circular in shape.
9. A method for welding pipes, characterized in that it uses an inflatable protection device for pipe welding according to any of claims 1-8, comprising the steps of:
s1, sequentially enabling the detachable end of the connecting piece to penetrate through the two pipelines to be welded, connecting the second end cover to the detachable end, and finally respectively covering the first end cover and the second end cover at two ends of the pipelines to be welded;
and S2, connecting and communicating the external pipeline with the opening, and filling inert gas into the pipeline to be welded through the gas filling hole.
10. A method of welding pipes as claimed in claim 9 wherein, after step S1, the two pipes to be welded are tack welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010173789.6A CN111390413A (en) | 2020-03-13 | 2020-03-13 | Inflation protection device for pipeline welding and pipeline welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010173789.6A CN111390413A (en) | 2020-03-13 | 2020-03-13 | Inflation protection device for pipeline welding and pipeline welding method |
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| Publication Number | Publication Date |
|---|---|
| CN111390413A true CN111390413A (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010173789.6A Pending CN111390413A (en) | 2020-03-13 | 2020-03-13 | Inflation protection device for pipeline welding and pipeline welding method |
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| CN (1) | CN111390413A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114535748A (en) * | 2022-02-23 | 2022-05-27 | 中船黄埔文冲船舶有限公司 | Marine penetration piece welding device and method |
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| CN2796928Y (en) * | 2005-06-27 | 2006-07-19 | 四川石油管理局 | Argon gas filling protection device for biphase stainless steel pipe line welding |
| CN201102129Y (en) * | 2007-11-06 | 2008-08-20 | 大庆石油管理局 | Argon-in tube protection energy conservation equipment |
| CN202062174U (en) * | 2011-05-12 | 2011-12-07 | 陕西建工集团设备安装工程有限公司 | Internal gas protecting device for pipeline welding |
| CN103170768A (en) * | 2011-12-21 | 2013-06-26 | 哈电集团（秦皇岛）重型装备有限公司 | Small-caliber straight pipe butt welding device |
| CN103753082A (en) * | 2013-12-24 | 2014-04-30 | 华东理工大学 | Weld centring and gas protecting device for furnace tube |
| CN203592240U (en) * | 2013-09-23 | 2014-05-14 | 北京航天新风机械设备有限责任公司 | Thin-wall cylinder section girth welding device |
| CN109396642A (en) * | 2018-12-06 | 2019-03-01 | 上海航天精密机械研究所 | A kind of gas shield device and method for cabin girth welding |
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2020
- 2020-03-13 CN CN202010173789.6A patent/CN111390413A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07214370A (en) * | 1994-02-01 | 1995-08-15 | Babcock Hitachi Kk | Radiographic method of weld zone |
| CN2796928Y (en) * | 2005-06-27 | 2006-07-19 | 四川石油管理局 | Argon gas filling protection device for biphase stainless steel pipe line welding |
| CN201102129Y (en) * | 2007-11-06 | 2008-08-20 | 大庆石油管理局 | Argon-in tube protection energy conservation equipment |
| CN202062174U (en) * | 2011-05-12 | 2011-12-07 | 陕西建工集团设备安装工程有限公司 | Internal gas protecting device for pipeline welding |
| CN103170768A (en) * | 2011-12-21 | 2013-06-26 | 哈电集团（秦皇岛）重型装备有限公司 | Small-caliber straight pipe butt welding device |
| CN203592240U (en) * | 2013-09-23 | 2014-05-14 | 北京航天新风机械设备有限责任公司 | Thin-wall cylinder section girth welding device |
| CN103753082A (en) * | 2013-12-24 | 2014-04-30 | 华东理工大学 | Weld centring and gas protecting device for furnace tube |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114535748A (en) * | 2022-02-23 | 2022-05-27 | 中船黄埔文冲船舶有限公司 | Marine penetration piece welding device and method |
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Application publication date: 20200710 |
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