CN211135868U - Pipeline welding back protective gas inflation device and equipment - Google Patents
Pipeline welding back protective gas inflation device and equipment Download PDFInfo
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- CN211135868U CN211135868U CN201922013147.5U CN201922013147U CN211135868U CN 211135868 U CN211135868 U CN 211135868U CN 201922013147 U CN201922013147 U CN 201922013147U CN 211135868 U CN211135868 U CN 211135868U
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Abstract
The utility model relates to a pipeline welding back protective gas aerating device, including the intake pipe, and gas distribution pipe, the one end of gas distribution pipe communicates with the one end of intake pipe, wherein, gas distribution pipe has L shape including first straight section and second straight section, the second straight section is suitable for and gets into in the pipeline and is provided with gas outlet channel, gas outlet channel follows the length direction setting of second straight section the utility model discloses still provide a pipeline welding back protective gas aerating equipment, including two above-mentioned aerating devices, two aerating devices's second straight section is suitable for and is on a parallel with pipeline axis and extends the arrangement backward each other in the pipeline.
Description
Technical Field
The embodiment of the utility model provides a pipeline welding field especially relates to pipeline welding back protective gas aerating device and equipment is related to.
Background
In the AP1000 nuclear power station, a large number of nickel-based alloys and stainless steel pipelines are adopted in a process pipeline system, such as a plant water pipeline, a compressed air pipeline, a condensed water pipeline, a demineralized water pipeline and the like, and when the process pipeline system is welded by tungsten argon arc welding (GTAW), in order to prevent the root of a welding seam from being oxidized, argon filling protection is needed to be carried out on the back of the welding seam.
At present, the conventional argon filling protection method is divided into two types according to an isolation mode, wherein one type is local isolation, and a closed air chamber is filled with argon; the other is isolated by the terminal boundary, and the whole tube is filled with argon. The local isolation argon filling can adopt water-soluble paper to make a closed air chamber, has the advantages of simple and convenient manufacture, no need of taking out a pipeline and one-time use, and can not be completely dissolved after being heated and carbonized to generate material residues; the detachable argon filling device can also be made of water-insoluble materials, and has the advantages of stable structure, good argon filling effect and reusability, and the defects that the materials cannot be left in the pipeline to be dissolved by water and must be taken out, so the application range of the detachable argon filling device is limited by the pipeline structure, and at least one end of the pipeline must be provided with an open port without obstructing the taking out of the argon filling device.
Meanwhile, the local isolation argon filling method can be divided into argon filling in the pipe and argon filling outside the pipe according to the argon filling mode. The argon filling in the tube is to introduce an argon tube into the interior of the tube through one end of the open tube and penetrate through the isolation barrier to fill argon in a prefabricated local closed gas chamber. The argon filling outside the pipe is to insert an argon pipe into a welding groove or a branch pipe port near the groove and directly fill the argon into a prefabricated local closed gas chamber or a whole pipe. The whole-pipe argon filling method is to fill argon into the whole section of the pipeline, the argon filling mode is generally that argon is filled outside the pipe, the argon is large in using amount and high in cost, longer argon filling time is needed, and the working efficiency is reduced.
The quality requirement level of the welding line in the field construction of the AP1000 nuclear power station is high, ray detection (RT) is required, the process standard is strict, the oxygen content of back gas before argon arc backing welding of the nickel-based alloy pipeline is not more than 0.5%, but part of pipelines have the characteristics of large pipe diameter, long pipe section, no branch pipe, closed two ends and the like, the interior of the welded pipeline cannot be reached, a detachable inner plugging argon filling device and an in-pipe argon filling mode cannot be implemented, and the conventional out-pipe argon filling method is poor in operability and difficult to realize the argon filling effect meeting the requirement.
SUMMERY OF THE UTILITY MODEL
In order to solve or alleviate the technical problems that the conventional method for filling argon outside the pipe has poor operability and is difficult to realize the argon filling effect meeting the requirements in the prior art, the utility model is provided.
According to an aspect of the embodiments of the utility model provides a pipeline welding back shielding gas aerating device is proposed, include:
an air inlet pipe; and
one end of the gas distribution pipe is communicated with one end of the gas inlet pipe,
wherein:
the gas distribution pipe has L shape including first straight section and second straight section, the second straight section is suitable for entering in the pipeline and is provided with air outlet channel, air outlet channel follows the length direction setting of second straight section.
Optionally, the air outlet direction of the air outlet channel is directly opposite to the adjacent pipe wall.
Optionally, the second straight section has a flat cross section, and a flat surface of the second straight section, which is directly opposite to the adjacent pipe wall, is provided with the air outlet channel.
Optionally, the air outlet channel includes a strip-shaped air outlet.
Optionally, the air outlet channel comprises a plurality of strip-shaped air outlets spaced apart from each other in parallel.
Optionally, the other end of the gas distribution pipe is a closed end.
Optionally, an arc-shaped section is arranged between the first straight section and the second straight section of the gas distribution pipe.
Optionally, the inflator further comprises a connection hose connected between the air inlet pipe and the gas distribution pipe.
According to another aspect of the embodiments of the present invention, there is provided a pipe welding back surface protective gas inflator, including two of the above-mentioned pipe welding back surface protective gas inflators, wherein: the second straight sections of the two inflators are adapted to extend oppositely from each other within the duct parallel to the duct axis.
According to an aspect of an embodiment of the present invention, it is proposed that the structures of the second straight sections of the two inflators are adapted to be arranged symmetrically to each other in the pipeline.
According to an aspect of an embodiment of the present invention, it is provided that two of the inflators share a common air inlet pipe, the air inlet pipe is connected with two flow dividing pipes, and the two flow dividing pipes are respectively communicated with the first straight sections of the two inflators; or each inflation device comprises a connecting hose, the two inflation devices share one air inlet pipe, the air inlet pipe is connected with two shunt pipes, and the two shunt pipes are communicated with the first straight sections of the two inflation devices through the connecting hose respectively.
Based on the technical scheme of the utility model, can be easy carry the inside isolation border of pipeline with protective gas. The method is beneficial to discharging residual air at the corner crack, improves the purity of the protective gas at the back of the pipeline welding, and can solve or relieve the back of the closed type crater with special pipeline structure, such as argon filling protection.
Drawings
These and other features and advantages of the various embodiments of the present disclosure will become better understood with regard to the following description, appended claims, and accompanying drawings where like reference numerals refer to like parts throughout and in which:
FIG. 1 is a schematic diagram illustrating the operation of a tube welding backside shielding gas inflator in accordance with an exemplary embodiment of the present invention;
FIG. 2 is a schematic top view of a straight section of a gas distribution tube of a tube-welded back side shielding gas inflator located within a tube according to an exemplary embodiment of the present invention;
fig. 3 is a schematic view of another perspective of a straight section of a gas distribution tube of a tube-welded back side shielding gas inflator device within a tube, with gas flow passages shown in phantom, according to an exemplary embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be further specifically described below by way of examples with reference to fig. 1-3 and argon filling device as an example. FIG. 1 is a schematic diagram illustrating the operation of a tube welding backside shielding gas inflator in accordance with an exemplary embodiment of the present invention; FIG. 2 is a schematic top view of a straight section of a gas distribution tube of a tube-welded back side shielding gas inflator located within a tube according to an exemplary embodiment of the present invention; fig. 3 is a schematic view of another perspective of a straight section of a gas distribution tube of a tube-welded back side shielding gas inflator device within a tube, with gas flow passages shown in phantom, according to an exemplary embodiment of the present invention. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the drawings is intended to explain the general inventive concept and should not be construed as limiting the invention.
The utility model discloses an adopt the difficult point that the outside of tubes argon filling mode is poor to the enclosed type pipeline weld bond, propose one kind and can reach the argon filling device on the inside isolation border of pipeline to in effective discharge corner crack residual air, improve pipeline welding back protective gas purity, thereby solve or alleviate the back argon filling protection problem of some special pipeline structure enclosed type weld bonds.
As shown in fig. 1 to 3, the present invention provides an argon filling device capable of reaching the inner isolation boundary of a pipeline, for improving the purity of the back shielding gas in pipeline welding. The argon filling device comprises an air inlet pipe 1, a shunt pipe 2, a connecting pipe 3 and an argon filling antenna 4.
The air inlet pipe 1 and the shunt pipe 2 are fixedly connected to form a shunt, and the two argon filling antennae 4 and the shunt are connected into a whole by the two connecting pipes 3 to form a complete argon filling device.
The air inlet pipe 1, the shunt pipe 2 and the argon filling antenna 4 can be metal pipes, and the connecting pipe 3 can be a flexible soft rubber pipe. The shunt pipe 2 is bent into a U shape and is welded with the air inlet pipe 1 after being perforated. The argon-filling antenna 4 adopts a straight section plus arc design, and as shown in figure 2, a linear inflation seam 41 is processed on the straight section of the arc inner side of the argon-filling antenna. It should be noted that in fig. 2, the inflation slit is 2, but other numbers are also possible. In addition, the inflation seam of FIG. 2 may be replaced with a plurality of inflation holes. Above scheme all is in the utility model discloses a within the scope of protection.
As shown in fig. 1, the argon-filled horn 4 includes a first straight section 4A and a second straight section 4B with an arc-shaped section 4C disposed therebetween. In fig. 1, the second straight section 4B is provided with an inflatable slit. As can be seen in fig. 3, at least the second straight section 4B has a flat shape.
As shown in fig. 1, the gas coming out of the second straight section 4B may directly impact the inner wall of the bottom of the pipe.
The argon filling operation of the argon filling apparatus will be described with reference to fig. 1.
Firstly, after the pipeline groove is processed to be qualified, the interior of the pipeline is cleaned, water-soluble paper is cut to a proper size, and the water-soluble paper is respectively put into two groups to be positioned at a proper distance from the groove in the pipeline and is sealed and fixed by a water-soluble adhesive tape. After the two pipelines are paired, a local isolation space is formed inside the pipeline.
Secondly, the two argon-filled antennae 4 extend into the inner isolation boundaries of the pipeline at two sides of the groove from the bottom of the pipeline respectively, and the parts of the two argon-filled antennae exposed outside the pipeline are wound and fixed by using adhesive tapes.
Thirdly, the water-soluble adhesive tape is used for circumferential winding and sealing of the pipeline groove (an exhaust hole is reserved at the upper part), and the water-soluble adhesive tape and the water-soluble paper inside the pipeline to be welded form a well-sealed air chamber together.
Fourthly, the argon guide pipe is connected with the air inlet pipe 1, argon enters the argon filling antenna 4 through the shunt pipe 2 respectively and overflows from the air filling seam 41, and the air chamber is filled with the argon quickly.
Fifthly, welding seams except the position of the argon filling antenna 4 are welded, the insertion position of the argon filling antenna 4 is timely adjusted according to the change of the welding position, and the argon flow is adjusted.
And finally, quickly taking out the argon filling feeler 4 to complete the welding of the residual welding line, and completing the argon filling.
In the scheme, the flow divider is designed by imitating a tee joint, one metal short pipe is bent into a U shape, then the center of the outer side of the bottom of the metal short pipe is provided with a hole, and another metal short pipe is inserted into the small hole and then is subjected to sealing welding. The connecting pipe can be a common argon-filled hose. The argon filling antenna adopts a straight section and arc design, so that the argon filling antenna can conveniently enter the deep part inside the pipeline through a smaller groove gap.
The following describes the production of the argon horn 4. A metal pipe is taken, 3/4 length parts are processed into a flat shape, the thickness is smaller than a pipeline groove gap, the end parts of the flat pipes are welded in a sealing mode, then the flat pipes close to the straight pipe parts are bent into an arc shape, the size of the radius of the arc shape can be adjusted according to the size of the pipeline groove based on the ductility and plasticity of the metal, and finally an inflation seam is processed on a straight section on the inner side of the argon-filled antenna arc shape. It should be noted that the tip of the argon-filled horn may or may not be closed.
In the scheme, the argon filling feeler extends to an isolation boundary inside the pipeline so as to effectively discharge residual air in the corner crack; by using the flow divider and the symmetrical double-argon-filling antenna, the argon filling speed is higher, and the internal air flows at two sides of the groove are more balanced and stable; processing on the inboard straight section of argon filling feeler arc, filling the argon and covering the face bigger, when filling argon from the pipeline bottom, the argon strikes the pipeline inner wall fast and upwards extrudees and get rid of the air, saves argon and leans on self proportion free settling time, and whole argon filling time shortens, and efficiency is higher.
Meanwhile, the argon filling device adopts an external argon filling mode, is simple and convenient to operate and convenient to disassemble, and greatly improves the argon filling speed and the argon filling effect compared with the traditional external argon filling method.
Compared with the prior art, the utility model provides a technical scheme can obtain one of following technological effect at least:
1. the problem of some special pipeline structures's closed type crater argon filling protection effect poor is solved or alleviated, also be applicable to the open pipeline welding argon filling protection of conventional port simultaneously, the operation is simpler, and the argon filling effect is better, and work efficiency is higher.
2. Simple structure, can make by hand, easy operation, quick detachable can used repeatedly.
3. The argon filling protection effect is improved, the oxygen content of the protective gas on the back of the pipeline can be reduced to 0.3 percent from 0.8 percent which can be achieved by the conventional argon filling method by using the argon filling device, and the welding requirement of the nickel-based alloy pipeline is met.
Fig. 1 illustrates the argon filling apparatus by way of example with two argon filling horns 4. It is to be noted that only one argon-filled horn 4 may be provided.
As can be appreciated, although described in terms of argon filling, the present invention is also useful for filling other duct welding back shielding gases.
Based on above, the utility model provides a following technical scheme:
1. a pipe welding backside shielding gas inflator, comprising:
an air inlet pipe; and
one end of the gas distribution pipe is communicated with one end of the gas inlet pipe,
wherein:
the gas distribution pipe has L shape including first straight section and second straight section, the second straight section is suitable for entering in the pipeline and is provided with air outlet channel, air outlet channel follows the length direction setting of second straight section.
2. A pipe welding backface protection gas inflator, comprising:
the back side protective gas charging device for welding the two pipelines,
wherein:
the second straight sections of the two inflators are adapted to extend oppositely from each other within the duct parallel to the duct axis.
The L shape here, which corresponds to the argon-filled horn 4 mentioned above, is only of a general shape and does not require that the first and second straight sections be perpendicular, and as shown in the drawings, an arcuate section may be provided between the two straight sections without affecting the overall shape of the gas distribution tube to be substantially L.
The outlet channel here corresponds, by way of example, to the inflation seam 41.
In the present invention, although the first straight section and the second straight section are described, the first straight section and the second straight section may have a curved shape, in other words, the "second straight section" includes all cases having an extension length in the axial direction of the pipe to be inflated, and the "first straight section" also includes all cases having an extension length in a direction substantially perpendicular to the second straight section.
Although embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (11)
1. A gas-filled apparatus for welding a pipe with a back surface, the gas-filled apparatus comprising:
an air inlet pipe; and
one end of the gas distribution pipe is communicated with one end of the gas inlet pipe,
wherein:
the gas distribution pipe has L shape including first straight section and second straight section, the second straight section is suitable for entering in the pipeline and is provided with air outlet channel, air outlet channel follows the length direction setting of second straight section.
2. The apparatus of claim 1, wherein:
the air outlet direction of the air outlet channel is directly opposite to the adjacent pipe wall.
3. The apparatus of claim 2, wherein:
the second straight section has a flat cross section, and the flat surface of the second straight section, which is directly opposite to the adjacent pipe wall, is provided with the air outlet channel.
4. The apparatus of claim 3, wherein:
the air outlet channel comprises a strip-shaped air outlet.
5. The apparatus of claim 4, wherein:
the air outlet channel comprises a plurality of strip-shaped air outlets which are spaced apart from each other in parallel.
6. The apparatus of claim 2, wherein:
the other end of the gas distribution pipe is a closed end.
7. The apparatus of any one of claims 1-6, wherein:
an arc-shaped section is arranged between the first straight section and the second straight section of the gas distribution pipe.
8. The apparatus of claim 1, further comprising:
and the connecting hose is connected between the air inlet pipe and the gas distribution pipe.
9. A pipe welding backface protection gas inflator, comprising:
two pipe welding backface protection gas inflators according to any one of claims 1-7,
wherein:
the second straight sections of the two inflators are adapted to extend oppositely from each other within the duct parallel to the duct axis.
10. The inflator device of claim 9 wherein:
the second straight sections of the two inflators are configured to be symmetrically disposed with respect to each other within the duct.
11. The inflator apparatus according to claim 9 or 10, wherein:
the two inflation devices share one air inlet pipe, the air inlet pipe is connected with two shunt pipes, and the two shunt pipes are respectively communicated with the first straight sections of the two inflation devices; or
Each aerating device includes a coupling hose, two aerating device sharing an intake pipe, two shunt tubes of intake-tube connection, two shunt tubes pass through respectively coupling hose communicates with each other with two aerating device's first straight section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922013147.5U CN211135868U (en) | 2019-11-20 | 2019-11-20 | Pipeline welding back protective gas inflation device and equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922013147.5U CN211135868U (en) | 2019-11-20 | 2019-11-20 | Pipeline welding back protective gas inflation device and equipment |
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| CN211135868U true CN211135868U (en) | 2020-07-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112247320A (en) * | 2020-10-20 | 2021-01-22 | 上海东鼎钢结构有限公司 | Large-caliber duplex stainless steel butt-joint protection welding device |
| CN112975053A (en) * | 2021-03-04 | 2021-06-18 | 双龙集团有限公司 | Nickel-based alloy cylinder, manufacturing method thereof and coulter type mixer |
-
2019
- 2019-11-20 CN CN201922013147.5U patent/CN211135868U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112247320A (en) * | 2020-10-20 | 2021-01-22 | 上海东鼎钢结构有限公司 | Large-caliber duplex stainless steel butt-joint protection welding device |
| CN112975053A (en) * | 2021-03-04 | 2021-06-18 | 双龙集团有限公司 | Nickel-based alloy cylinder, manufacturing method thereof and coulter type mixer |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210128 Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee after: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee before: STATE NUCLEAR POWER ENGINEERING Co. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. |