CN210548767U - Special pipe welding back argon filling protection device - Google Patents
Special pipe welding back argon filling protection device Download PDFInfo
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- CN210548767U CN210548767U CN201921072606.0U CN201921072606U CN210548767U CN 210548767 U CN210548767 U CN 210548767U CN 201921072606 U CN201921072606 U CN 201921072606U CN 210548767 U CN210548767 U CN 210548767U
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- air supply
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Abstract
The utility model relates to a special pipe welding back argon filling protection device, which comprises a fixed plugging piece and a movable plugging piece, wherein the fixed plugging piece comprises a support piece and an air bag, the support piece is in a circular plate shape, the air bag is arranged on the outer ring of the support piece in an annular sealing manner, the structure of the movable plugging piece is the same as that of the fixed plugging piece, and the air bag of the movable plugging piece is communicated with the air bag of the fixed plugging piece through an air bag ventilation hose; the fixed plugging piece is connected with the movable plugging piece through an air supply steel pipe, one end of the air supply steel pipe is fixed at the center of the fixed plugging piece supporting piece, the other end of the air supply steel pipe is plugged and provided with an external thread, the movable plugging piece supporting piece is internally provided with an internal thread, and the air supply steel pipe at the outer side of the movable plugging piece is provided with a fixing nut; the gas supply steel pipe is provided with a connecting piece, and the connecting piece is connected with the argon bottle; the air supply steel pipe is provided with an eyelet. The special pipe welding back argon filling protection device provided in the technical scheme can effectively solve the problem of complex mounting and dismounting in the prior art.
Description
Technical Field
The utility model relates to a welding seam back protection technical field, concretely relates to special pipe welding back argon filling protection device.
Background
The welding seam back protection method which is usually adopted in engineering comprises argon filling, nitrogen filling or mixed gas protection, and protection by using a flux-cored wire or coating an antioxidant, but the back argon filling protection method which is usually adopted in engineering has stable protection effect, strong adaptability and relatively low cost. The traditional back argon filling protection is that argon is filled from one end of a pipe to a welding position, for example, when a new power plant superheater pipe is welded, argon is inserted into a header pipe seat from an inlet of a header through a conveying conduit to be filled with the argon, when a power plant superheater pipe high-alloy steel pipe is overhauled, a low-alloy steel pipe needs to be cut firstly to fill the argon, and then the cut low-alloy steel pipe is welded. Particularly, in areas with high sulfur content in a plain gas field, places needing welding of nickel-based composite pipes, pipelines between two gas transmission wells and alloy small pipe craters are very large in number, and the defects are more prominent.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a special pipe welding back argon filling protection device, it can effectively solve the troublesome poeration that exists among the prior art, the complicated problem is dismantled in the installation.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a special pipe welding back argon filling protection device comprises a fixed plugging piece and a movable plugging piece, wherein the fixed plugging piece comprises a supporting piece and an air bag, the supporting piece is in a circular plate shape, the air bag is arranged on the outer ring of the supporting piece in an annular sealing mode, the structure of the movable plugging piece is the same as that of the fixed plugging piece, and the air bag of the movable plugging piece and the air bag of the fixed plugging piece are communicated and arranged through an air bag ventilation hose; the fixed plugging piece is connected with the movable plugging piece through an air supply steel pipe, one end of the air supply steel pipe is fixedly connected to the center of a supporting piece of the fixed plugging piece, the other end of the air supply steel pipe is plugged and provided with a section of external thread, the center of the supporting piece of the movable plugging piece is provided with a through hole, an internal thread matched with the external thread is arranged in the through hole, and a fixing nut is arranged on the air supply steel pipe outside the movable plugging piece; the gas feeding steel pipe outside the fixed plugging piece is provided with a connecting piece, and the connecting piece is connected with an argon bottle through an argon pipe; the air feeding steel pipe is provided with an eyelet.
One of the setting modes of the supporting piece is as follows: the support piece comprises two stainless steel plates which are arranged in parallel, the air bag is arranged between the two stainless steel plates in an annular sealing mode, and the radius of the inflated state of the air bag is larger than that of the stainless steel plates.
Another arrangement of the supporting part is as follows: support piece includes the stainless steel board, and the outer lane of stainless steel board is provided with the gasbag groove that is used for fixed gasbag, the longitudinal section in gasbag groove is circular-arcly, and the open end in circular-arc gasbag groove outwards arranges, the gasbag sets up in the gasbag inslot, the radius of gasbag gas filled state is greater than the radius of gasbag groove outermost terminal surface.
Furthermore, the holes are arranged on the air supply steel pipe at intervals, and each hole is uniformly arranged along the circumferential direction of the air supply steel pipe at equal intervals.
Furthermore, a universal joint is further arranged on one side of the air supply steel pipe close to the movable plugging piece.
Furthermore, a pull ring for pulling is arranged on the outer side of the fixed plugging piece, and a traction rope is arranged on the pull ring.
The special pipe welding back argon filling protection device provided in the technical scheme can be moved and lengthened, and the distance between the two stainless steel plates can be changed by loosening and disassembling screws; one end is fixed, and the other end can move; the hole is punched on the steel pipe between the two stainless steel plates for conveying and releasing argon gas, so that the argon gas concentration at the back of the welded junction is ensured, the peripheries of the two stainless steel plates are well sealed, and no leakage exists; the stainless steel plate of the moving end is connected with a nipple with an external thread which is used for being connected with the gas supply steel pipe and then leading the stainless steel plate to the outer side of the main pipeline to be connected with an argon bottle; the air supply steel pipe connected by the universal joint can be suitable for bent pipes at different angles, so that argon is effectively saved, and the quality is guaranteed; meanwhile, sealing plates of different specifications can be detached and replaced, and the device is suitable for welding steel pipes of different specifications.
Drawings
FIG. 1 is a schematic view of the special tube welding back argon-filling protection device of the present invention in an operating state of embodiment 1;
fig. 2 is a schematic view of the use state of the special tube welding back argon filling protection device of the embodiment 2 of the present invention.
In the figure: 1. a movable plugging member; 11. a stainless steel plate; 12. an air bag groove; 13. an air bag; 2. an air supply steel pipe; 21. an eyelet; 22. an external thread; 23. fixing a nut; 24. a universal joint; 3. fixing the plugging piece; 4. an air bag vent hose; 41. a hose; 42. a valve; 5. an external thread nipple; 6. an argon pipe; 7. a pull ring; 71. a nylon cord; 8. a pipeline; 81. welding a bead; 82. asbestos cloth.
Detailed Description
In order to make the objects and advantages of the present invention more apparent, the present invention will be described in detail with reference to the following embodiments. It is to be understood that the following text is only intended to describe one or several particular embodiments of the invention, and does not strictly limit the scope of the claims specifically claimed.
Example 1
As shown in fig. 1, a special pipe welding back argon filling protection device comprises a fixed plugging piece 3 and a movable plugging piece 1, wherein the fixed plugging piece 3 comprises a support piece and an air bag 13, the support piece is in a circular plate shape, the air bag 13 is arranged on the outer ring of the support piece in an annular sealing manner, the structure of the movable plugging piece 1 is the same as that of the fixed plugging piece 3, the air bag 13 of the movable plugging piece 1 and the air bag 13 of the fixed plugging piece 3 are communicated and arranged through an air bag ventilation hose 4, the air bag ventilation hose 4 is arranged along an air supply steel pipe 2, a pneumatic quick connector is arranged on the air bag ventilation hose 4 positioned on the outer side of the fixed plugging piece 3, the pneumatic quick connector is connected with an air supply device through a hose 41, and a valve 42 can be further arranged on the hose 41 and used for controlling inflation; the fixed plugging piece 3 is connected with the movable plugging piece 1 through the air supply steel pipe 2, one end of the air supply steel pipe 2 is fixedly connected to the center of a supporting piece of the fixed plugging piece 3, the other end of the air supply steel pipe 2 is plugged, a section of external thread 22 is arranged on the air supply steel pipe 2, a through hole is formed in the center of the supporting piece of the movable plugging piece 1, an internal thread matched with the external thread 22 is arranged in the through hole, a fixing nut 23 is arranged on the air supply steel pipe 2 on the outer side of the movable plugging piece 1, and the movable plugging piece 1 is adjusted by threads to be spaced from the fixed plugging piece 3 and is fixed by the fixing nut 23; an external nipple 5 is arranged on the air feeding steel pipe 2 outside the fixed plugging piece 3, and the external nipple 5 is connected with an external argon gas bottle through an argon gas pipe 6; the gas supply steel pipe 2 is provided with the holes 21, wherein the holes 21 are arranged on the gas supply steel pipe 2 at intervals, and each hole 21 is uniformly arranged along the circumferential direction of the gas supply steel pipe 2 at equal intervals, but considering that argon gas cannot directly face a welding pool, the interval distance between the holes 21 at two middle sections can be slightly larger, and the position of a welding bead 81 can be avoided conveniently.
The support piece includes two parallel arrangement's stainless steel plate 11 in this embodiment, and gasbag 13 is the sealed setting of cyclic annular between two stainless steel plate 11, and the radius of gasbag 13 inflation state is greater than stainless steel plate 11, the shutoff effect of the gasbag to the pipeline of being convenient for. One side of the air supply steel pipe 2 close to the movable plugging piece 1 is also provided with a universal joint 24, the air supply steel pipe 2 is a straight hollow pipe, a plugging point of the air supply steel pipe is arranged on the left side of the universal joint, the right side of the air supply steel pipe is additionally provided with the universal joint and a screw, and the universal joint becomes a turning point at the moment, so that the air supply steel pipe is suitable for bent pipes with different angles.
In addition, the outer side of the fixed plugging piece 3 is also provided with a pull ring 7 for pulling, and the pull ring 7 is provided with a nylon rope 71, so that the protection device can be conveniently taken out after the pipeline is welded.
Example 2
As shown in fig. 2, a special pipe welding back argon filling protection device comprises a fixed plugging piece 3 and a movable plugging piece 1, wherein the fixed plugging piece 3 comprises a support piece and an air bag 13, the support piece is in a circular plate shape, the air bag 13 is arranged on the outer ring of the support piece in an annular sealing manner, the structure of the movable plugging piece 1 is the same as that of the fixed plugging piece 3, the air bag 13 of the movable plugging piece 1 and the air bag 13 of the fixed plugging piece 3 are communicated and arranged through an air bag ventilation hose 4, the air bag ventilation hose 4 is arranged along an air supply steel pipe 2, a pneumatic quick connector is arranged on the air bag ventilation hose 4 positioned on the outer side of the fixed plugging piece 3, the pneumatic quick connector is connected with an air supply device through a hose 41, and a valve 42 can be further arranged on the hose 41 and used for controlling inflation; the fixed plugging piece 3 is connected with the movable plugging piece 1 through an air supply steel pipe 2, one end of the air supply steel pipe 2 is fixedly connected to the center of a supporting piece of the fixed plugging piece 3, the other end of the air supply steel pipe 2 is provided with an external thread 22, the center of the supporting piece of the movable plugging piece 1 is provided with a through hole, an internal thread matched with the external thread 22 is arranged in the through hole, and a fixing nut 23 is arranged on the air supply steel pipe 2 outside the movable plugging piece 1; an external nipple 5 is arranged on the air feeding steel pipe 2 outside the fixed plugging piece 3, and the external nipple 5 is connected with an external argon gas bottle through an argon gas pipe 6; the gas supply steel pipe 2 is provided with the holes 21, wherein the holes 21 are arranged on the gas supply steel pipe 2 at intervals, and each hole 21 is uniformly arranged along the circumferential direction of the gas supply steel pipe 2 at equal intervals, but considering that argon gas cannot directly face a welding pool, the interval distance between the two holes 21 in the middle section can be slightly larger, and the welding seam position is convenient to avoid.
In the embodiment, the support member comprises a stainless steel plate 11, an air bag groove 12 for fixing the air bag is arranged on the outer ring of the stainless steel plate 11, the longitudinal section of the air bag groove 12 is arc-shaped, the open end of the arc-shaped air bag groove 12 is arranged outwards, the air bag is arranged in the air bag groove 12, and the radius of the inflated state of the air bag is larger than the radius of the outermost end face of the air bag groove 12. One side of the air supply steel pipe 2 close to the movable plugging piece 1 is also provided with a universal joint 24, the air supply steel pipe 2 is a straight hollow pipe, a plugging point of the air supply steel pipe is arranged on the left side of the universal joint, the right side of the air supply steel pipe is additionally provided with the universal joint and a screw, and the universal joint becomes a turning point at the moment, so that the air supply steel pipe is suitable for bent pipes with different angles.
In addition, the outside of the fixed plugging piece 3 is also provided with a pull ring 7 for pulling, and the pull ring 7 is provided with a nylon rope 71 (also can be a tether such as an iron wire) for conveniently pulling out the protection device after welding.
The utility model discloses a use method as follows: firstly, placing a special pipe welding back argon filling protection device on the inner side of a pipe with a living mouth to be welded (asbestos cloth 82 is laid on the outer side of a welding bead 81), and then, an air bag does not need to be inflated; after the alignment of the pipeline is finished, the device is moved to the welding port, the air bag is inflated, when the air bag is tightly attached to the inner wall of the pipeline 8, the inflation valve is closed, the sealing effect can be achieved, the argon gas is inflated, and the welding is prepared; after the welding is finished, the inflation valve is opened to enable the air bag to be deflated, the protection device is pulled out easily from the left side of the welding opening by the aid of the traction rope and the pull ring, and the next welding opening can be welded.
The above detailed description of the embodiments of the present invention has been provided with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and those skilled in the art can make several equivalent transformations and substitutions without departing from the principles of the present invention after learning the contents of the present invention.
Claims (6)
1. The utility model provides a special pipe welding back argon filling protection device which characterized in that: the device comprises a fixed plugging piece and a movable plugging piece, wherein the fixed plugging piece comprises a supporting piece and an air bag, the supporting piece is in a circular plate shape, the air bag is arranged on the outer ring of the supporting piece in an annular sealing manner, the structure of the movable plugging piece is the same as that of the fixed plugging piece, and the air bag of the movable plugging piece and the air bag of the fixed plugging piece are communicated and arranged through an air bag ventilation hose; the fixed plugging piece is connected with the movable plugging piece through an air supply steel pipe, one end of the air supply steel pipe is fixedly connected to the center of a supporting piece of the fixed plugging piece, the other end of the air supply steel pipe is plugged and provided with a section of external thread, the center of the supporting piece of the movable plugging piece is provided with a through hole, an internal thread matched with the external thread is arranged in the through hole, and a fixing nut is arranged on the air supply steel pipe outside the movable plugging piece; the gas feeding steel pipe outside the fixed plugging piece is provided with a connecting piece, and the connecting piece is connected with an argon bottle through an argon pipe; the air feeding steel pipe is provided with an eyelet.
2. The special pipe welding back argon-filling protection device according to claim 1, characterized in that: the support piece comprises two stainless steel plates which are arranged in parallel, the air bag is arranged between the two stainless steel plates in an annular sealing mode, and the radius of the inflated state of the air bag is larger than that of the stainless steel plates.
3. The special pipe welding back argon-filling protection device according to claim 1, characterized in that: support piece includes the stainless steel board, and the outer lane of stainless steel board is provided with the gasbag groove that is used for fixed gasbag, the longitudinal section in gasbag groove is circular-arcly, and the open end in circular-arc gasbag groove outwards arranges, the gasbag sets up in the gasbag inslot, the radius of gasbag gas filled state is greater than the radius of the outermost terminal surface in gasbag groove.
4. The special tube welding back argon-filling protection device according to claim 2 or 3, characterized in that: the holes are arranged on the air supply steel pipe at intervals, and the holes at each position are uniformly arranged along the circumferential direction of the air supply steel pipe at equal intervals.
5. The special tube welding back argon-filling protection device according to claim 2 or 3, characterized in that: and a universal joint is further arranged on one side of the air supply steel pipe close to the movable plugging piece.
6. The special tube welding back argon-filling protection device according to claim 2 or 3, characterized in that: and a pull ring for pulling is arranged on the outer side of the fixed plugging piece, and a traction rope is arranged on the pull ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921072606.0U CN210548767U (en) | 2019-07-10 | 2019-07-10 | Special pipe welding back argon filling protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921072606.0U CN210548767U (en) | 2019-07-10 | 2019-07-10 | Special pipe welding back argon filling protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210548767U true CN210548767U (en) | 2020-05-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921072606.0U Expired - Fee Related CN210548767U (en) | 2019-07-10 | 2019-07-10 | Special pipe welding back argon filling protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210548767U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113138104A (en) * | 2021-04-11 | 2021-07-20 | 董金呈 | Industrial waste gas sampling device suitable for multiple outlet duct |
| CN117583767A (en) * | 2024-01-18 | 2024-02-23 | 北京建工路桥集团有限公司 | Heating pipeline welding device and method applied to severe cold region under negative temperature |
-
2019
- 2019-07-10 CN CN201921072606.0U patent/CN210548767U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113138104A (en) * | 2021-04-11 | 2021-07-20 | 董金呈 | Industrial waste gas sampling device suitable for multiple outlet duct |
| CN117583767A (en) * | 2024-01-18 | 2024-02-23 | 北京建工路桥集团有限公司 | Heating pipeline welding device and method applied to severe cold region under negative temperature |
| CN117583767B (en) * | 2024-01-18 | 2024-03-29 | 北京建工路桥集团有限公司 | Heating pipeline welding device and method applied to severe cold region under negative temperature |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200519 |