CN112453653A - Open type back argon filling protection device - Google Patents
Open type back argon filling protection device Download PDFInfo
- Publication number
- CN112453653A CN112453653A CN202011287320.1A CN202011287320A CN112453653A CN 112453653 A CN112453653 A CN 112453653A CN 202011287320 A CN202011287320 A CN 202011287320A CN 112453653 A CN112453653 A CN 112453653A
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- CN
- China
- Prior art keywords
- gas
- argon
- pipe
- protection
- protection device
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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.)
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/032—Seam welding; Backing means; Inserts for three-dimensional seams
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
- B23K9/325—Devices for supplying or evacuating shielding gas
Abstract
The utility model provides an open type back argon filling protection device, includes gaseous safety cover and gas-supply pipe, and gaseous safety cover has a basic confined lateral wall and surrounds formation inflation space, and gaseous safety cover is connected to the one end of gas-supply pipe, and the hose of carrying argon gas is connected to one end in addition, and wherein the gas-supply pipe is connected the one end of gaseous safety cover is bent into the arc, and the aperture ratio of gaseous safety cover is than the aperture of gas-supply pipe is wide, for example, has basically for circular shape aperture, and the gas-supply pipe becomes certain inclination with gaseous safety cover. The gas protection cover is provided with a basically closed side wall to form a wider caliber relative to the gas transmission pipe, so that a closed argon chamber can be established, and the working area of the gas protection can be enlarged; the gas transmission pipe is arc-shaped, so that the flow velocity of gas can be reduced. The open-type back surface Chongya protection device has the advantages of being simple to manufacture, convenient to operate, capable of saving argon gas, good in protection effect and the like, successfully solves the problem of open-type back surface argon filling protection, and can be popularized and applied to other engineering fields.
Description
Technical Field
The invention relates to the technical field of engineering construction, in particular to an open type back argon flushing protection device for a high-temperature gas cooled reactor nuclear power station.
Background
The high-temperature gas cooled reactor nuclear power station applies a large amount of stainless steel and alloy steel materials, and argon arc welding is a common welding method. The trunnion material of the main steam system of the nuclear island is P91 (phi 267 multiplied by 29mm), P91 steel is used for the first time in a nuclear power station, and the argon protection effect directly influences the weld quality. The welding seam between the trunnion and the pipeline belongs to an open structure, a closed argon chamber can not be established for argon filling protection like the back argon protection of pipeline welding, and the argon filling-free protective agent has higher requirements on coating size, thickness, butt-joint gap and current control.
Therefore, how to adapt to the back welding of the high-temperature gas cooled reactor nuclear power station to solve the problem of back argon flushing protection of the welding seam between the trunnion and the pipeline of the main steam system becomes a technical problem which needs to be solved urgently in the prior art.
Disclosure of Invention
The invention aims to provide an open-structure back argon-flushing protection device for a high-temperature gas cooled reactor nuclear power station, which comprises a gas protection cover and a gas delivery pipe with a certain radian, so as to solve the problem of back argon-flushing protection of a welding seam between a trunnion and a pipeline of a main steam system.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an open type back argon filling protection device which characterized in that:
the open type back argon filling protection device comprises a gas protection cover and a gas pipe,
the gas protection cover is provided with a basically closed side wall, the side wall surrounds and forms an inflation space, and the inflation space is used for containing gas from the gas conveying pipe;
one end of the gas pipe is connected with the gas protection cover, the other end of the gas pipe is connected with a hose for conveying argon, wherein the gas pipe is connected with one end of the gas protection cover and is bent into an arc shape.
Optionally, the aperture of the gas protection cover is wider than the aperture of the gas pipe.
Optionally, the gas shield has a substantially circular aperture.
Optionally, the gas pipe and the gas protection cover form a certain inclination angle.
Optionally, the gas transmission pipe is a steel pipe with the length of 1 meter and the diameter of 14mm, and the wall thickness of the steel pipe is 3 mm;
the gas protection cover is a steel pipe with the length of 5cm and the diameter of 22mm, and the wall thickness of the steel pipe is 6 mm.
The invention has the following advantages:
1. the gas protection cover is provided with a basically closed side wall to form a wider caliber relative to the gas conveying pipe, so that on one hand, a closed argon chamber can be established for argon filling protection, and on the other hand, the working area of gas protection can be enlarged.
2. The gas transmission pipe is arc-shaped, so that the flow velocity of gas can be reduced, and the influence of high-speed flowing gas on the welding surface is avoided.
The open-type back surface Chongya protection device has the advantages of being simple to manufacture, convenient to operate, capable of saving argon gas, good in protection effect and the like, successfully solves the problem of open-type back surface argon filling protection, and can be popularized and applied to other engineering fields.
Drawings
FIG. 1 is a schematic diagram of an open back argon protection arrangement according to an embodiment of the present invention;
fig. 2 is a diagram of the target parts of the operation of the open back argon protection system according to an embodiment of the present invention.
The reference numerals in the drawings respectively refer to the technical features:
1. a gas-tight enclosure; 2. a gas delivery pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The invention is characterized in that: the gas protection cover is connected with the gas conveying pipe, and has a relatively wide caliber relative to the gas conveying pipe, so that on one hand, a closed argon chamber can be established for argon filling protection, and on the other hand, the working area of gas protection can be enlarged; the gas transmission pipe is arc-shaped, so that the flow velocity of gas can be reduced, and the influence of high-speed flowing gas on the welding surface is avoided.
Specifically, referring to fig. 1, a schematic diagram of an open back argon-filled protection device according to an embodiment of the present invention is shown.
The open type back argon filling protection device comprises a gas protection cover 1 and a gas pipe 2,
the gas protection cover 1 has a substantially closed side wall which encloses an inflation space for receiving gas from the gas line, so that a closed argon gas chamber can be created for argon protection,
the one end of gas-supply pipe 2 is connected gas protection cover 1, the hose of carrying argon gas is connected to one end in addition, wherein gas-supply pipe 2 is connected the one end of gas protection cover 1 is bent into the arc, like this for the argon gas before getting into gas protection cover 1 can reduce the velocity of flow, avoids the gas of high-speed flow to produce the influence to the welding surface.
Furthermore, the aperture of the gas protection cover 1 is wider than that of the gas pipe 2, so that the working area of gas protection can be enlarged, and the flow rate of the protection gas can be further reduced.
Further, the gas shield case 1 has a substantially circular caliber.
Furthermore, the gas pipe and the gas protection cover form a certain inclination angle, so that the gas protection cover can be conveniently moved in the welding process, and the argon filling protection device is flexible to use.
Examples
Referring to fig. 2, there is shown the subject parts of the open back argon protection system of the present invention in operation. In the embodiment, the back argon-filling protection device for the open structure of the high-temperature gas-cooled reactor nuclear power station adopts a steel pipe (phi 14 multiplied by 3mm, wherein 3mm represents the wall thickness of the steel pipe) with the length of 1 meter (which can be adjusted according to actual conditions) as a gas conveying pipe 2 to be connected with an argon hose, the other end of the steel pipe is connected with a steel pipe with the length of 5cm and phi 22 multiplied by 6mm, wherein 6mm represents the wall thickness of the steel pipe, and the steel pipe with the length of 5cm and phi 22 multiplied by 6mm is used as a gas protection cover 1 and has a diameter wider than that of the gas conveying pipe 2. One end of the gas pipe 2 is communicated with argon, and the other end connected with the gas protection cover is bent into an arc shape so as to move at the root of the whole circumferential weld for convenience. After argon is connected, the gas protection cover 1 moves slowly along with the welding speed, and the effect of back protection is achieved.
The construction method comprises the following steps.
1. The high-temperature reactor demonstration engineering main steam pipeline is an ID 267X 29mm P91 pipeline, the assembly of trunnions and the pipeline is completed according to the requirements of a welding process card before welding, and the assembly gap is controlled to be 0-4 mm.
2. Before welding, an assistant person connects the gas pipe 2 with an argon hose, places the gas protection cover 1 on the back side and opens argon, and the flow of argon is controlled at 25L/min.
3. And after the back is flushed with argon for 10 seconds, argon arc welding is started, and in the welding process, the back protection device moves slowly along with the moving speed of welding, so that the situation that the periphery of a welding molten pool is filled with argon is fully ensured.
4. After finishing 3 layers of argon arc welding bottoming, removing the back argon protection device, checking the welding seam root, wherein the root is not oxidized, and the back argon protection effect is better.
The invention has the following advantages:
1. the gas protection cover is provided with a basically closed side wall to form a wider caliber relative to the gas conveying pipe, so that on one hand, a closed argon chamber can be established for argon filling protection, and on the other hand, the working area of gas protection can be enlarged.
2. The gas transmission pipe is arc-shaped, so that the flow velocity of gas can be reduced, and the influence of high-speed flowing gas on the welding surface is avoided.
The open-type back surface Chongya protection device has the advantages of being simple to manufacture, convenient to operate, capable of saving argon gas, good in protection effect and the like, successfully solves the problem of open-type back surface argon filling protection, and can be popularized and applied to other engineering fields.
While the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides an open type back argon filling protection device which characterized in that:
the open type back argon filling protection device comprises a gas protection cover and a gas pipe,
the gas protection cover is provided with a basically closed side wall, the side wall surrounds and forms an inflation space, and the inflation space is used for containing gas from the gas conveying pipe;
one end of the gas pipe is connected with the gas protection cover, the other end of the gas pipe is connected with a hose for conveying argon, wherein the gas pipe is connected with one end of the gas protection cover and is bent into an arc shape.
2. The open back argon-filled protection device of claim 1, characterized in that:
the aperture of the gas protection cover is wider than the aperture of the gas pipe.
3. The open back argon-filled protection device of claim 2, wherein:
the gas shield has a substantially circular aperture.
4. The open back argon-filled protection device of claim 2 or 3, characterized in that:
the gas transmission pipe and the gas protection cover form a certain inclination angle.
5. The open back argon-filled protection device of claim 4, wherein:
the gas transmission pipe is a steel pipe with the length of 1 meter and the diameter of 14mm, and the wall thickness of the steel pipe is 3 mm;
the gas protection cover is a steel pipe with the length of 5cm and the diameter of 22mm, and the wall thickness of the steel pipe is 6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011287320.1A CN112453653A (en) | 2020-11-17 | 2020-11-17 | Open type back argon filling protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011287320.1A CN112453653A (en) | 2020-11-17 | 2020-11-17 | Open type back argon filling protection device |
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| Publication Number | Publication Date |
|---|---|
| CN112453653A true CN112453653A (en) | 2021-03-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011287320.1A Pending CN112453653A (en) | 2020-11-17 | 2020-11-17 | Open type back argon filling protection device |
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| Country | Link |
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| CN (1) | CN112453653A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61108478A (en) * | 1984-10-31 | 1986-05-27 | Toyota Motor Corp | Welding method for preventing generation of blow-hole |
| CN203171132U (en) * | 2013-04-16 | 2013-09-04 | 中国化学工程第七建设有限公司 | Large-diameter pipeline welding back gas protective cover |
| CN204221222U (en) * | 2014-10-20 | 2015-03-25 | 上海希希埃动力控制设备有限公司 | For the back filled argon protection device of large diameter steel pipe welding |
| CN108857001A (en) * | 2018-09-19 | 2018-11-23 | 西南交通大学 | A kind of argon arc welding welding robot weld seam backside gas protective device |
| CN211102081U (en) * | 2019-10-31 | 2020-07-28 | 江苏标新工业有限公司 | Local protection device for back of large-diameter furnace tube |
-
2020
- 2020-11-17 CN CN202011287320.1A patent/CN112453653A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61108478A (en) * | 1984-10-31 | 1986-05-27 | Toyota Motor Corp | Welding method for preventing generation of blow-hole |
| CN203171132U (en) * | 2013-04-16 | 2013-09-04 | 中国化学工程第七建设有限公司 | Large-diameter pipeline welding back gas protective cover |
| CN204221222U (en) * | 2014-10-20 | 2015-03-25 | 上海希希埃动力控制设备有限公司 | For the back filled argon protection device of large diameter steel pipe welding |
| CN108857001A (en) * | 2018-09-19 | 2018-11-23 | 西南交通大学 | A kind of argon arc welding welding robot weld seam backside gas protective device |
| CN211102081U (en) * | 2019-10-31 | 2020-07-28 | 江苏标新工业有限公司 | Local protection device for back of large-diameter furnace tube |
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Application publication date: 20210309 |
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