CN211102081U - Local protection device for back of large-diameter furnace tube - Google Patents
Local protection device for back of large-diameter furnace tube Download PDFInfo
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- CN211102081U CN211102081U CN201921857020.5U CN201921857020U CN211102081U CN 211102081 U CN211102081 U CN 211102081U CN 201921857020 U CN201921857020 U CN 201921857020U CN 211102081 U CN211102081 U CN 211102081U
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- shaped safety
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Abstract
The utility model provides a local protection device in heavy-calibre boiler tube back, admits air including argon and takes over, triangle-shaped safety cover, filter screen, flows around net and heavy-calibre boiler tube, the heavy-calibre boiler tube back be provided with the triangle-shaped safety cover, the triangle-shaped safety cover on be provided with argon and admit air and take over, the triangle-shaped safety cover on be provided with the filter screen, the triangle-shaped safety cover in be provided with and flow around the net. The utility model discloses a local protection device in heavy-calibre boiler tube back 1 can effectively guarantee welder's welded position controllable so that the welding seam shaping is pleasing to the eye, and the welding seam quality has reached customer's operation requirement. 2. The welding efficiency of a welder is improved, the operation is simple and convenient, and the manufacturing cost is reduced. 3. Simple structure, easy and simple to handle, the practicality is strong. By utilizing the local protection device on the back, the operation of a welder is convenient, the back of the furnace tube is attractive in appearance, the quality of a welding seam is ensured, the use amount of argon is reduced, and the cost is reduced.
Description
Technical Field
The utility model relates to a gas shielded welding field, in particular to local protection device in heavy-calibre boiler tube back more than 1000 mm.
Background
In the prior art, the welding method using inert gas argon as the shielding period covers the arc with argon to isolate air, so as to prevent the oxidation of the molten pool and the adjacent heat affected zone. The protection of the back of the furnace tube with small caliber adopts a closed airtight chamber for protection; if the large furnace tube butt welding seam with the diameter of more than 1000mm adopts the airtight chamber, the area of the airtight chamber is large, the time is long when argon can fully enter the airtight chamber, and the using amount of the argon is large. Under the premise, in consideration of welding cost and time, a method for protecting the local back surface needs to be provided, so that the back surface of the welding seam can achieve the effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical problem and providing a local protection device at the back of a large-diameter furnace tube.
The purpose of the utility model is realized like this: the utility model provides a local protection device in heavy-calibre boiler tube back which characterized in that: including argon gas admission takeover, triangle-shaped safety cover, filter screen, around flowing net and heavy-calibre boiler tube, the heavy-calibre boiler tube back be provided with the triangle-shaped safety cover, the triangle-shaped safety cover on be provided with argon gas admission takeover, the triangle-shaped safety cover on be provided with the filter screen, the triangle-shaped safety cover in be provided with around flowing the net.
As a preferred technical scheme: the contact surface of the triangular protective cover and the large-diameter furnace tube is in arc contact; the argon gas inlet connecting pipe is fixed on the triangular protective cover in a welding and fixing connection mode.
As a preferred technical scheme: a plurality of air outlet holes are uniformly formed in the filter screen; the filter screen is fixed on the triangular protective cover in a discontinuous welding and fixing connection mode.
As a preferred technical scheme: the flow winding net is flatly laid in the triangular protective cover and is compressed by the filter screen; the streaming net is tiled with 4-5 layers.
The utility model discloses a local protection device in heavy-calibre boiler tube back 1 can effectively guarantee welder's welded position controllable so that the welding seam shaping is pleasing to the eye, and the welding seam quality has reached customer's operation requirement. 2. The welding efficiency of a welder is improved, the operation is simple and convenient, and the manufacturing cost is reduced. 3. Simple structure, easy and simple to handle, the practicality is strong. By utilizing the local protection device on the back, the operation of a welder is convenient, the back of the furnace tube is attractive in appearance, the quality of a welding seam is ensured, the use amount of argon is reduced, and the cost is reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention
FIG. 2 is an installation diagram of the present invention
In the figure: 1. an argon gas inlet connecting pipe; 2. a triangular protective cover; 3. a filter screen; 4. a bypass flow net; 5. a large-diameter furnace tube.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, which are not intended as limitations of the present invention: the utility model provides a local protection device in heavy-calibre boiler tube back which characterized in that: including argon gas intake take over 1, triangle-shaped safety cover 2, filter screen 3, around flowing net 4 and heavy- calibre boiler tube 5, 5 backs of heavy-calibre boiler tube be provided with triangle-shaped safety cover 2, triangle-shaped safety cover 2 on be provided with argon gas intake take over 1, triangle-shaped safety cover 2 on be provided with filter screen 3, triangle-shaped safety cover 2 in be provided with around flowing net 4.
The contact surface of the triangular protective cover 2 and the large-diameter furnace tube 5 is in arc contact; the argon gas inlet connecting pipe 1 is fixed on the triangular protective cover 2 in a welding and fixing connection mode. A plurality of air outlet holes are uniformly formed in the filter screen 3; the filter screen 3 is fixed on the triangular protective cover 2 in an intermittent welding and fixing connection mode. The flow-around net 4 is tiled in the triangular protective cover 2 and is pressed tightly by the filter screen 3; the streaming net 4 is tiled with 4-5 layers.
In the specific implementation: firstly welding a triangular protective cover, wherein two sides of the protective cover are required to be tightly attached to the inner wall when the protective cover is used according to the radian of the inner hole of the furnace tube, an air inlet connecting pipe is welded at the end part of the protective cover, a flow winding net is tiled for 4-5 layers in the protective cover, a filter net is tightly welded by argon, and the filter net is discontinuously spot-welded on the protective cover. During welding, the device is moved according to the position of a welding gun of a welder, argon enters from the air inlet connecting pipe and flows around the flow net to enable the argon to carry out back protection softly, and therefore the back protection of a welding seam achieves a good effect.
The above embodiments of the present invention are only examples for clearly illustrating the present invention, but not for limiting the scope of the present invention, and all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (4)
1. The utility model provides a local protection device in heavy-calibre boiler tube back which characterized in that: including argon gas intake takeover (1), triangle-shaped safety cover (2), filter screen (3), around flowing net (4) and heavy-calibre boiler tube (5), heavy-calibre boiler tube (5) back be provided with triangle-shaped safety cover (2), triangle-shaped safety cover (2) on be provided with argon gas intake takeover (1), triangle-shaped safety cover (2) on be provided with filter screen (3), triangle-shaped safety cover (2) in be provided with around flowing net (4).
2. The local protection device for the back of the large-diameter furnace tube of claim 1, wherein: the contact surface of the triangular protective cover (2) and the large-caliber furnace tube (5) is in arc contact; the argon gas inlet connecting pipe (1) is fixed on the triangular protective cover (2) in a welding and fixing connection mode.
3. The local protection device for the back of the large-diameter furnace tube of claim 1, wherein: a plurality of air outlet holes are uniformly formed in the filter screen (3); the filter screen (3) is fixed on the triangular protective cover (2) in an intermittent welding and fixing connection mode.
4. The local protection device for the back of the large-diameter furnace tube of claim 1, wherein: the circumfluence net (4) is tiled in the triangular protective cover (2) and is pressed tightly by the filter screen (3); the circumfluence net (4) is tiled with 4-5 layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921857020.5U CN211102081U (en) | 2019-10-31 | 2019-10-31 | Local protection device for back of large-diameter furnace tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921857020.5U CN211102081U (en) | 2019-10-31 | 2019-10-31 | Local protection device for back of large-diameter furnace tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211102081U true CN211102081U (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921857020.5U Active CN211102081U (en) | 2019-10-31 | 2019-10-31 | Local protection device for back of large-diameter furnace tube |
Country Status (1)
| Country | Link |
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| CN (1) | CN211102081U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111889853A (en) * | 2020-07-30 | 2020-11-06 | 哈尔滨锅炉厂有限责任公司 | Gas protection device for deep-melting TIG welding and use method thereof |
| CN112453653A (en) * | 2020-11-17 | 2021-03-09 | 华能山东石岛湾核电有限公司 | Open type back argon filling protection device |
-
2019
- 2019-10-31 CN CN201921857020.5U patent/CN211102081U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111889853A (en) * | 2020-07-30 | 2020-11-06 | 哈尔滨锅炉厂有限责任公司 | Gas protection device for deep-melting TIG welding and use method thereof |
| CN112453653A (en) * | 2020-11-17 | 2021-03-09 | 华能山东石岛湾核电有限公司 | Open type back argon filling protection device |
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