CN215469049U - Gas protection device for pipeline welding - Google Patents
Gas protection device for pipeline welding Download PDFInfo
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- CN215469049U CN215469049U CN202121247041.2U CN202121247041U CN215469049U CN 215469049 U CN215469049 U CN 215469049U CN 202121247041 U CN202121247041 U CN 202121247041U CN 215469049 U CN215469049 U CN 215469049U
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Abstract
The utility model discloses a gas protection device for pipeline welding, which comprises a flexible pipe and two groups of sealing support components, wherein the flexible pipe is connected with the sealing support components through a pipeline; the sealing support components comprise support blocks, and the outer circumferences of the support blocks are provided with inflatable sealing rings which are used for being in sealing contact with the inner wall of the pipeline to be welded; a flow guide hole is arranged in the supporting block and is used for communicating the inflatable sealing ring with the flexible pipe; the flow guide holes in the support blocks of at least one group of sealing support assemblies are connected with an air inlet pipe joint which is used for communicating a protective air source; the flow guide holes in the support blocks of at least one group of sealing support assemblies are connected with a pressure release valve, and the output end of the pressure release valve is positioned in a sealing cavity defined by the two groups of sealing support assemblies and the pipeline to be welded. The utility model can realize that the stainless steel pipeline of the area to be welded is partially filled with the protective gas, reduces the cost of the protective gas in the welding process of the pipeline and simultaneously ensures that the welding quality of the inner wall of the pipeline is more stable.
Description
Technical Field
The utility model relates to the technical field of pipeline welding appliances, in particular to a gas protection device for pipeline welding.
Background
The waste resin receiving and transferring pipeline is a main facility for connecting the nuclear equipment with the three-waste treatment center, and is mainly used for transferring waste resin generated by operation and maintenance of the nuclear equipment to the three-waste treatment center. The nuclear equipment is generally far away from the three-waste treatment center, and generally ranges from hundreds of meters to thousands of meters. The waste resin receiving and transferring pipeline is formed by welding a plurality of stainless steel seamless steel pipes and pipe fittings with fixed lengths, the diameter of the waste resin receiving and transferring pipeline is generally 40-500 mm, double-side welding cannot be adopted, and only a welding process of single-side welding and double-side forming can be adopted. In order to ensure the internal welding quality of the pipeline, argon is filled into the pipeline in the welding process to form argon protection, so that the phenomenon that the pipeline is directly contacted with air to generate oxidation during welding is avoided. In order to reduce the argon cost and ensure the internal welding quality of the pipeline, the local part of the region to be welded needs to be filled with argon.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problems, the utility model provides a gas protection device for pipeline welding, which can realize the local argon filling of a stainless steel pipeline in a region to be welded, avoid the argon filling of the whole pipeline in the pipeline welding process, reduce the argon cost of the pipeline in the welding process and simultaneously enable the welding quality of the inner wall of the pipeline to be more stable.
The utility model is realized by the following technical scheme:
a gas protection device for pipeline welding comprises a flexible pipe and two groups of sealing support assemblies, wherein the two groups of sealing support assemblies are connected through the flexible pipe; the sealing support components comprise support blocks, and inflatable sealing rings are arranged on the outer circumferences of the support blocks and are used for being in contact with the inner wall of the pipeline to be welded to establish a gas protection area; a flow guide hole is formed in the supporting block and used for communicating the inflatable sealing ring with the flexible pipe; the flow guide holes in the support blocks of at least one group of sealing support assemblies are connected with an air inlet pipe joint, and the air inlet pipe joint is used for communicating with a protective air source; and the flow guide holes in the support blocks of at least one group of sealing support assemblies are communicated with the pressure release valves, and the output ends of the pressure release valves are positioned in a sealing cavity defined by the two groups of sealing support assemblies and the pipeline to be welded.
The working principle of the device provided by the utility model is as follows: protective gas enters the protective gas diversion hole in the supporting block through the gas inlet pipe joint, the protective gas is injected into the inflatable sealing ring, two annular sealing rings are formed on the inner wall of the pipeline after the inflatable sealing ring is expanded, so that a section of local gas protection area is established, the isolation of air in the pipeline and the protective gas is realized, when the pressure in the inflatable sealing ring rises to the tripping pressure of the pressure release valve, the pressure release valve is opened, and the protective gas is filled in the protection area at the position to be welded for protection.
When the protection device provided by the utility model is used, the sealing support assembly provided with the pressure release valve is firstly placed into a pipeline, then the other sealing support assembly is placed into the other pipeline, then the specific positions of the left and right sealing support assemblies are adjusted to be kept at the position 70-100 mm away from the to-be-welded opening of the pipeline, and then a protection gas source is connected to fill protection gas into the protection device.
Further preferably, the flexible pipe support further comprises a connecting joint, and the end part of the flow guide hole of the support block is connected with the end part of the flexible pipe through the connecting joint.
Preferably, one end of the connecting joint is detachably mounted at the end part of the flow guide hole of the supporting block or fixed at the end part of the flow guide hole of the supporting block, and the other end of the connecting joint is in threaded connection with the flexible pipe; one end of the air inlet pipe joint is in threaded connection with the end part of the diversion hole, and the other end of the air inlet pipe joint is connected with the protective air pipe through a pagoda structure.
Further preferably, an annular mounting groove is further formed in the outer circumference of the supporting block, and the inflatable sealing ring is arranged in the annular mounting groove.
Further preferably, the flexible pipe is a metal corrugated hose.
The flexible pipe is a metal corrugated hose, such as a stainless steel corrugated hose, and is used for connecting the two groups of sealing support assemblies and conveying protective gas (such as argon). Adopt the corrugated metal pipe, can avoid damaging the hose because of the too high temperature of welding department when the pipeline group is to the welding, and corrugated metal pipe can be crooked wantonly, has avoided producing other additional forces and lead to the phenomenon that whole device can't take out when pulling.
Further preferably, the device further comprises a traction rope, one end of the traction rope is connected with the supporting block or the air inlet pipe joint, and the other end of the traction rope is used for applying traction force.
The other end of the pull line is used to apply a pulling force for pulling the entire assembly along the interior of the duct, such as to adjust the position of the seal support assembly within the duct or to move the entire gas shield apparatus out of the duct.
Further preferably, the outer edges of the end faces of the two ends of the supporting block are rounded.
Avoid the closed angle to abrade the inner wall of the pipeline and to plug the support assembly into the pipeline when convenient to use.
Preferably, the sealing support assembly further comprises a roller assembly, the roller assembly comprises a universal ball, at least three mounting holes are formed in the outer wall of the support block along the circumferential direction, and the three mounting holes are located on the same radial section; and a universal ball is arranged in each mounting hole and is used for rolling and contacting with the inner wall of the pipeline to be welded.
Further preferably, the roller assembly further comprises a spring; a spring is arranged in the mounting hole, one end of the spring is fixed at the bottom of the mounting hole, and the other end of the spring is in contact with a shaft shoulder of the universal ball; the axial direction of the spring is perpendicular to the axial direction of the supporting block.
Further preferably, the roller assembly further comprises a stopper; the check block is used for limiting the telescopic stroke of the universal ball and preventing the universal ball from being separated from the mounting hole.
The roller component is used for supporting the whole device, so that a certain gap is formed between the outer circle of the supporting block and the inner wall of the pipeline, and the phenomenon that the inner wall is scratched and damaged due to sliding friction generated between the outer circle of the supporting block and the inner wall of the pipeline when the roller component is dragged is avoided. The springs are arranged in the roller wheel assemblies, and when the universal ball moves to the position of a welding seam, the three roller wheel assemblies on the outer circle of the supporting block can displace towards the axis of the pipeline under the action of the weld seam surplus height, so that the universal ball can smoothly cross the weld seam surplus height.
The utility model has the following advantages and beneficial effects:
1. according to the device provided by the utility model, only one air pipe needs to be connected in the use process, the inflatable sealing rings on the supporting sealing components at the two ends are inflated preferentially in the device, two annular sealing rings are formed by the inflatable sealing rings after being swelled and the inner wall of the pipeline, and when the pressure in the inflatable sealing rings reaches a certain value, the pressure release valve is opened, and the protection gas is automatically filled in the area to be welded.
2. The universal wheels are arranged on the circumference of the sealing support assembly, so that the sealing support assembly is in a suspended state, and when the device is installed in a pipeline and taken out of the pipeline, the sliding friction generated between the device and the inner wall of the pipeline is avoided to scratch the inner wall of the pipeline.
In conclusion, the device provided by the utility model can automatically fill protective gas into a welding protection area, can ensure the sealing and isolating effect at the sealing and supporting components at two ends, and has the advantages of convenience in use, simple structure, convenience in operation, no damage to the inner wall of a pipeline and the like. The sealing isolation effect is good, the pressure can be automatically released, the risk of explosion of an inflatable sealing ring in the use process is avoided, the space of a gas protection area of a position to be welded is small, the concentration of protective gas is easy to control, the internal welding quality of a pipeline is guaranteed, the consumption of the protective gas is less, and the cost of the protective gas in the construction process is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the internal structure of the seal support assembly of the present invention.
Reference numbers and corresponding part names in the drawings: 1-a sealing support component, 11-a support block, 12-a roller component, 13-an inflatable sealing ring, 14-a pressure release valve, 2-a connecting joint, 3-a flexible pipe, 4-an air inlet pipe joint and 5-a hauling rope.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
The embodiment provides a pipeline welded gas protection device, including flexible pipe 3 and two sets of sealed supporting component 1, two sets of sealed supporting component 1 pass through flexible pipe 3 and connect. The two sets of seal support assemblies 1 are substantially similar in structure, and the shielding gas in this embodiment is argon gas, for example.
Each group of sealing support components 1 comprises a support block 11, the shape structure of the support block 11 is cylindrical, and the material is a plastic product. An annular mounting groove is further formed in the outer circumference of the supporting block 11, an inflatable sealing ring 13 is arranged in the annular mounting groove, and the inflatable sealing ring 13 is used for being in sealing contact with the inner wall of the pipeline to be welded. A flow guide hole is arranged in the supporting block 11 and is used for communicating the inflatable sealing ring 13 with the flexible pipe 3, and specifically, for example, the flow guide hole is arranged at the center of the end face circle of two opposite supporting blocks 11, extends into the supporting block 11 along the axial direction of the supporting block 11, and then extends along the radial direction of the supporting block 11 to be communicated with the inflatable sealing ring 13; and the port of the flow guide hole on the end surface of the supporting block 11 is used for connecting the flexible pipe 3.
The flow guide holes in the supporting blocks 11 of at least one group of sealing supporting assemblies 1 are also connected with an air inlet pipe connector 4, and the air inlet pipe connector 4 is used for being communicated with an argon gas source. The air inlet pipe joints 4 can be arranged on the supporting blocks 11 of the two groups of sealing supporting components 1, and the air inflation is carried out in a double-end air inlet mode; the present embodiment preferably provides that the air inlet pipe connector 4 is arranged on the supporting block 11 of one group of the sealing and supporting assemblies 1.
The flow guide holes in the supporting blocks 11 of at least one group of sealing supporting components 1 are connected with a pressure release valve 14, and the output end of the pressure release valve 14 is positioned in a sealing cavity surrounded by the two groups of sealing supporting components 1 and the pipeline to be welded. A pressure release valve 14 can be arranged on the supporting block 11 of each of the two groups of sealing supporting components 1, and the two ends of the supporting block are decompressed and inflated; in the present embodiment, it is preferable to arrange branch guiding holes in the supporting blocks 11 of the other group of sealing supporting assemblies 1 to install the pressure relief valves 14.
Argon enters an argon guide hole in the supporting block 11 of the first group of supporting components 1 through the air inlet pipe connector 4, and argon is injected into the inflatable sealing ring 13; meanwhile, argon flows to an argon guide hole in the supporting block 11 of the other group of supporting components 1 through the guide hole and the pipeline of the flexible pipe 3, and then the argon enters the corresponding inflatable sealing ring 13; inflatable sealing ring 13 on two sets of supporting component 11 will form two annular sealing rings on treating the inner wall of welded pipe after the inflation, and then form one section local argon protection region, realize that intraductal air and argon are kept apart, treat that argon fills to certain pressure when, relief valve 14 is opened, fills argon to treating the protection region of welding the position.
Example 2
The design is further optimized on the basis of the embodiment 1, the flexible pipe support device further comprises a connecting joint 2, and the end part of the flow guide hole of the support block 11 is connected with the end part of the flexible pipe 3 through the connecting joint 2. The connecting joint 2 is made of stainless steel, one end of the connecting joint 2 is detachably mounted at the end part of the flow guide hole of the supporting block 11, and the other end of the connecting joint 2 is in threaded connection with the flexible pipe 3; one end of the air inlet pipe joint 4 is in threaded connection with the end part of the flow guide hole, and the other end of the air inlet pipe joint 4 is connected with the protective air pipe through a pagoda structure. The connection joint 2 and the air inlet pipe joint 4 are both hollow air guide pipe connection joints.
The flexible pipe 3 is a metal corrugated hose, such as a stainless steel corrugated hose, and is used for connecting the two groups of sealing support assemblies 1 and conveying argon gas. Adopt the corrugated metal pipe, can avoid damaging the hose because of the too high temperature of welding department when the pipeline group is to the welding, and corrugated metal pipe can be crooked wantonly, has avoided producing other additional forces and lead to the phenomenon that whole device can't take out when pulling.
The gas protection device is characterized by further comprising a traction rope 5, wherein one end of the traction rope 5 is connected with the supporting block 11 or the gas inlet pipe joint 4, and the other end of the traction rope 5 is used for applying traction force for drawing the whole device to move along the interior of the pipeline, such as adjusting the position of the sealing supporting component 1 in the pipeline or moving the whole gas protection device out of the pipeline.
Example 3
The design is further optimized on the basis of the embodiment 1 or 2, the outer edges of the end faces of the two ends of the supporting block 11 are rounded corners, so that sharp corners are prevented from scratching the inner wall of the pipeline, and the supporting component is convenient to plug into the pipeline when in use.
The seal support assembly 1 further comprises a roller assembly 12, wherein the roller assembly 12 comprises a universal ball, a spring and a stopper. Three mounting holes are formed in the outer wall of the supporting block 11 along the circumferential direction, the three mounting holes are uniformly distributed along the circumferential direction of the supporting block 11 at equal intervals, and the three mounting holes are located on the same radial section; and each mounting hole is internally provided with a universal ball which is used for rolling and contacting with the inner wall of the pipeline to be welded. A spring is arranged in the mounting hole, one end of the spring is fixed at the bottom of the mounting hole, and the other end of the spring is connected with a shaft shoulder of the universal ball; the axial direction of the spring is perpendicular to the axial direction of the support block 11. The dog is used for limiting the flexible stroke of universal ball, avoids universal ball to break away from the mounting hole.
The roller assembly 12 is used for supporting the whole device, so that a certain gap is formed between the outer circle of the supporting block 11 and the inner wall of the pipeline, and the phenomenon that the inner wall is scratched and the supporting block 11 is damaged due to sliding friction generated between the outer circle of the supporting block 11 and the inner wall of the pipeline when the device is dragged is avoided. The roller assemblies 12 are provided with springs, and when the universal ball moves to the position of the welding seam, the three roller assemblies 12 on the outer circle of the supporting block 11 will displace towards the axis of the pipeline under the action of the weld seam residual height, so that the universal ball can smoothly cross the weld seam residual height.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A gas protection device for pipeline welding comprises a flexible pipe (3) and two groups of sealing support components (1), wherein the two groups of sealing support components (1) are connected through the flexible pipe (3), and the gas protection device is characterized in that the sealing support components (1) respectively comprise a support block (11), an inflatable sealing ring (13) is arranged on the outer circumference of the support block (11), and the inflatable sealing ring (13) is used for being in sealing contact with the inner wall of a pipeline to be welded; a flow guide hole is formed in the supporting block (11) and is used for communicating the inflatable sealing ring (13) with the flexible pipe (3);
the flow guide holes in the supporting blocks (11) of at least one group of sealing supporting components (1) are connected with an air inlet pipe joint (4), and the air inlet pipe joint (4) is used for communicating a protective air source;
the flow guide holes in the supporting blocks (11) of at least one group of sealing supporting components (1) are connected with a pressure release valve (14), and the output end of the pressure release valve (14) is positioned in a sealing cavity surrounded by the two groups of sealing supporting components (1) and the pipeline to be welded.
2. The gas protection device for pipeline welding according to claim 1, further comprising a connection joint (2), wherein the end of the diversion hole of the support block (11) is connected with the end of the flexible pipe (3) through the connection joint (2).
3. The gas protection device for pipeline welding according to claim 2, wherein one end of the connecting joint (2) is detachably mounted at the end of the flow guide hole of the supporting block (11) or fixed at the end of the flow guide hole of the supporting block (11), and the other end of the connecting joint (2) is in threaded connection with the flexible pipe (3); one end of the air inlet pipe joint (4) is in threaded connection with the end part of the diversion hole, and the other end of the air inlet pipe joint (4) is connected with the protective air pipe through a pagoda structure.
4. The gas protection device for pipeline welding according to claim 1, wherein the supporting block (11) is further provided with an annular mounting groove on the outer circumference, and the inflatable sealing ring (13) is arranged in the annular mounting groove.
5. Gas shield arrangement for pipe welding according to claim 1, characterized in that the flexible pipe (3) is a metal bellows.
6. The gas protection device for pipeline welding according to claim 1, further comprising a pulling rope (5), wherein one end of the pulling rope (5) is connected with the support block (11) or the air inlet pipe joint (4), and the other end of the pulling rope (5) is used for applying a pulling force.
7. The gas-protecting device for pipeline welding according to claim 1, wherein the outer edges of the end faces of the supporting block (11) are rounded.
8. The gas protection device for pipeline welding according to any one of claims 1 to 7, wherein the sealing support assembly (1) further comprises a roller assembly (12), the roller assembly (12) comprises a universal ball, at least three mounting holes are formed along the outer wall of the support block (11) along the circumferential direction, and the three mounting holes are located on the same radial section; and a universal ball is arranged in each mounting hole and is used for rolling and contacting with the inner wall of the pipeline to be welded.
9. A gas-shielding device for pipeline welding according to claim 8, wherein said roller assembly (12) further comprises a spring; a spring is arranged in the mounting hole, one end of the spring is fixed at the bottom of the mounting hole, and the other end of the spring is in contact with a shaft shoulder of the universal ball; the axial direction of the spring is perpendicular to the axial direction of the supporting block (11).
10. A gas-shielding device for welding pipes according to claim 9, wherein the roller assembly (12) further comprises a stopper; the check block is used for limiting the telescopic stroke of the universal ball and preventing the universal ball from being separated from the mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121247041.2U CN215469049U (en) | 2021-06-04 | 2021-06-04 | Gas protection device for pipeline welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121247041.2U CN215469049U (en) | 2021-06-04 | 2021-06-04 | Gas protection device for pipeline welding |
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| Publication Number | Publication Date |
|---|---|
| CN215469049U true CN215469049U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121247041.2U Active CN215469049U (en) | 2021-06-04 | 2021-06-04 | Gas protection device for pipeline welding |
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| CN (1) | CN215469049U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114713949A (en) * | 2022-03-23 | 2022-07-08 | 西安菲尔特金属过滤材料股份有限公司 | Be used for metal mesh belt automatic weld back gas protection device |
-
2021
- 2021-06-04 CN CN202121247041.2U patent/CN215469049U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114713949A (en) * | 2022-03-23 | 2022-07-08 | 西安菲尔特金属过滤材料股份有限公司 | Be used for metal mesh belt automatic weld back gas protection device |
| CN114713949B (en) * | 2022-03-23 | 2024-05-28 | 西安菲尔特金属过滤材料股份有限公司 | Automatic welding back gas protection device for metal mesh belt |
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