CN218476138U - Pipeline welding local inflation protection device - Google Patents
Pipeline welding local inflation protection device Download PDFInfo
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- CN218476138U CN218476138U CN202220996466.1U CN202220996466U CN218476138U CN 218476138 U CN218476138 U CN 218476138U CN 202220996466 U CN202220996466 U CN 202220996466U CN 218476138 U CN218476138 U CN 218476138U
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Abstract
The utility model discloses a pipeline welding local inflation protection device, which comprises a front end rubber round baffle plate, a rear end rubber round baffle plate, two side clamping plates and an air inlet pipe, and is characterized in that the outer diameter of the baffle plate is 6mm larger than the inner diameter of the pipeline, and the ovality error is controlled to be +/-2 mm; the opening of the air inlet pipe of the front end baffle is close to the edge and rotates to the bottom during construction; the centers of the clamping plates at the two sides far away from the welding port are fixedly connected with a pull rope. The utility model discloses a device can carry out local inflation to the welding seam, and structure and size reasonable in design are sealed effectual, save the protection gas, and exhaust efficiency is high, and the availability factor of device is high, and the wearing and tearing of sealing member are little.
Description
Technical Field
The utility model relates to a pipeline welding technical field specifically relates to a pipeline welding local gas filled protection device.
Background
During industrial pipeline welding, in order to guarantee the quality of a welding seam and the cleanliness of the pipeline, argon arc welding is basically adopted for pipeline welding, namely, argon is filled in the pipeline during welding. When the diameter of the pipeline is large and the connecting pipeline is long, if argon is filled in the two ends of the pipeline in a plugging way, a large amount of argon can be consumed. If the pipeline is longer or the plugging tightness is poorer, the air pressure of gas in the pipeline is difficult to ensure, the welding seam is often not well protected, the oxide layer is more, the flaw detection is unqualified, and the rework treatment is caused. Therefore, local inflation protection is mostly adopted for the welded junction part at present, the closed space is reduced, and the argon consumption is saved. Utility model patents with patent numbers ZL201820303804.2, ZL200520034595.9, ZL200820062059.3 and ZL201420429837.3 all disclose that the welding quality is guaranteed to the device that the welding zone part is filled with protective gas, save time and save gas.
The utility model with the patent number of ZL201820303804.2 discloses a pipeline welding local argon protection device, which comprises an argon hose, a bolt, a sealing pressure ring, a flexible sealing gasket I, an air outlet pipe, an air outlet hole, a blocking plate, a flexible sealing gasket II, an iron wire, a lifting lug, a pressing cover, a nut and a retaining ring; the sealing gasket fixing and plugging structures on the two sides consist of bolts, sealing pressure rings, flexible sealing gaskets I, plugging plates, flexible sealing gaskets II, pressure covers, nuts and baffle rings; the first flexible sealing gasket and the second flexible sealing gasket are combined by adopting rubber gaskets and thick sponge; one end of the gland is provided with a lifting lug for connecting an iron wire, and the iron wire has enough strength and length larger than that of a pipeline to be welded. However, the structure of the technical scheme is complex, the first sealing gasket is fixedly connected with the second sealing gasket through the air pipe, and the first sealing gasket and the second sealing gasket can only be integrally fed in and out from one end in use, so that time and labor are wasted, and the service life of the sealing gasket is shortened. The technical solutions disclosed in the utility model patents with patent numbers ZL200520034595.9 and ZL200820062059.3 also have the same problem. The utility model patent publication of patent number ZL201420429837.3 discloses a technical scheme's seal baffle is almost totally flexible, and intake pipe and outlet duct connect in the baffle centre of a circle, and the stay cord setting is at the baffle edge for the device operates inconveniently when using, and atmosphere control is inefficient.
Therefore, it is an urgent technical problem to develop a protection device for local inflation during pipe welding, which has a simple structure, good sealing performance and convenient operation.
SUMMERY OF THE UTILITY MODEL
Because prior art has above-mentioned defect, the utility model provides a pipeline welding local inflation protection device to solve simple and convenient, sealed good problem of carrying out the local inflation protection to pipeline welding mouth.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a local inflation protection device for pipeline welding comprises a front rubber round baffle and a rear rubber round baffle; clamping plates are arranged on two sides of the baffle; the opening of the front end baffle is connected with an air inlet pipe; the rear end baffle is kept airtight; it is characterized in that the preparation method is characterized in that,
the outer diameter of the baffle is 6mm larger than the inner diameter of the pipeline, and the ovality error is controlled to be +/-2 mm;
the opening of the air inlet pipe of the front end baffle is close to the edge, the front end baffle rotates to the bottom during construction, and the length of the air inlet pipe is enough to extend out of the pipeline;
the clamping plate and the baffle plate are fixedly fastened through a plurality of pairs of split bolts which are axially and symmetrically distributed;
the center of the clamping plates on the two sides far away from the welding port is fixedly connected with a pull rope, and the length of the pull rope is enough to extend out of the pipeline.
The utility model discloses a use method is: the baffles at the two ends are sequentially placed at the two sides of a welding port of the pipeline, and the pull ropes at the two ends and the air inlet pipes extend out of the pipeline, so that the two baffles are symmetrically arranged at the two sides of the welding line and air does not leak between the baffles and the pipeline; firstly, spot welding is carried out on the welding seams of the two pipelines, and argon is not filled at the moment; after spot welding butt joint is completed, filling argon through an air inlet pipe on one side, expelling air in the pipeline, and maintaining small-dose argon to be introduced, so that pipeline welding can be performed; after welding, the device can be pulled out from two sides before the welding seam is cooled, and the device can also be pulled out from one side after the welding seam is cooled.
The sealing baffle plate of the device has reasonable structure and size design and good sealing effect; air is introduced from the bottom, so that the air discharging efficiency is greatly improved; after welding is finished, the device can be pulled out from the two ends without waiting for cooling of the welding line, so that the use efficiency of the device is improved; the stay cord is located between the seal baffle, reduces seal baffle's wearing and tearing when the installation is dismantled.
Preferably, a connecting chain is arranged between the baffle plates. This feature facilitates pulling the entire device out from one side.
Preferably, the thickness of the baffle is 50mm. This feature ensures a longer service life and tightness of the seal.
Preferably, the clamping plates are galvanized steel plates 2mm thick.
Preferably, the diameter of the galvanized steel sheet is 30mm smaller than the diameter of the baffle. This feature improves the structural stability of the sealing baffle.
Preferably, the front end baffle and the rear end baffle are respectively arranged in the pipe section at a distance of 40-80 mm from the welding port. This feature prevents weld heat from shortening the seal life.
Preferably, the pull rope is a thin steel rope with the diameter of 6 mm. This feature ensures the tensile strength of the pull cord.
Preferably, the air inlet pipe is a hose with the diameter of 10mm, and the hose is sealed by a sealant.
Compared with the prior art, the utility model has following advantage or beneficial effect:
(1) The structure and the size are reasonable in design, the sealing effect is good, and the abrasion of the sealing element is small;
(2) Bottom air intake, greatly improve the efficiency of discharging air;
(3) The device can be pulled out from the two ends without waiting for the cooling of the welding line, so that the use efficiency of the device is improved;
(4) The pipe fitting is suitable for various pipelines such as stainless steel pipes, titanium alloy pipes and the like, and has wide application range.
The utility model provides a pipeline welding local inflation protection device, which comprises a front end rubber round baffle, a rear end rubber round baffle, two side clamping plates and an air inlet pipe, and is characterized in that the outer diameter of the baffle is 6mm larger than the inner diameter of the pipeline, and the ovality error is controlled within +/-2 mm; the opening of the air inlet pipe of the front end baffle is close to the edge and rotates to the bottom during construction; the center of the clamping plates at the two sides far away from the welding port is fixedly connected with a pull rope. The utility model discloses a device can carry out local inflation to the welding seam, and structure and size reasonable in design are sealed effectual, save the protection gas, and exhaust efficiency is high, and the availability factor of device is high, and the wearing and tearing of sealing member are little.
Drawings
The invention and its features, aspects and advantages will become more apparent from a reading of the following detailed description of non-limiting embodiments with reference to the attached drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
wherein, 1 is rubber baffle, 2 is the splint, and 3 are split bolts, and 4 are treating the welded pipe, and 5 are the welding mouth, and 6 are the intake pipe, and 7 are the stay cord, and 8 are the connection chain.
Detailed Description
The structure of the present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
Example 1
As shown in figure 1, the local inflation protection device for pipeline welding comprises a rubber round baffle plate 1 at the front end and the rear end; clamping plates 2 are arranged on two sides of the baffle 1; the opening of the front end baffle is connected with an air inlet pipe 6; the rear end baffle is kept airtight; the outer diameter of the baffle 1 is 6mm larger than the inner diameter of the pipeline 4, the ovality error is controlled to be +/-2 mm, and the air tightness of the baffle is ensured; the opening of the air inlet pipe 6 of the front end baffle is close to the edge, the front end baffle rotates at the bottom during construction, and the length of the air inlet pipe 6 is enough to extend out of the pipeline 4;
the clamping plate 2 and the baffle plate 1 are fixedly fastened through two pairs of split bolts 3 which are distributed in an axisymmetric manner;
the center of the clamping plates at the two sides far away from the welding port 5 is fixedly connected with a pull rope 7, and the length of the pull rope 7 is enough to extend out of the pipeline 4.
In this embodiment, a detachable connecting chain 8 is arranged between the baffles. The thickness of the baffle 1 is 50mm. Splint 2 is the galvanized steel sheet of 2mm thick, the diameter ratio of galvanized steel sheet 30mm less than the diameter of baffle. The distance between the front end baffle and the welding port of the rear end baffle arranged in the pipe section is 40mm respectively. The pull rope 7 is a thin steel rope with the diameter of 6 mm. The air inlet pipe 6 is a hose with the diameter of 10mm, and the hose is sealed by sealant.
The installation of the device needs to place the two end baffles 1 at two sides of the pipeline welding port 5 in sequence, stretch the two end pull ropes 7 and the air inlet pipe 6 out of the pipe, install the chain 8, and ensure that the two baffles are symmetrically arranged at two sides of the welding line and do not leak air between the two baffles and the pipeline. When the device is used for welding, the welding seam of the two pipelines 4 is firstly spot-welded, and argon is not filled at the moment; after spot welding butt joint is completed, filling argon through the air inlet pipe 6 on one side, expelling air in the pipeline, and then keeping small-dose argon to be introduced, so that pipeline welding can be performed; after welding, the device is pulled out from one side after the to-be-welded seam is cooled.
Example 2
A pipeline welding local inflation protection device is similar to the structure of the pipeline welding local inflation protection device in the embodiment 1. Unlike embodiment 1, in this embodiment, no connecting chain is provided between the baffle plates. The distances between the front end baffle and the rear end baffle which are arranged in the pipe section and the welding port are respectively 80mm.
After the device is used for welding, the device can be pulled out from two sides before the welding line is cooled.
Example 3
A pipeline welding local inflation protection device is similar to the structure of the local inflation protection device in the embodiment 1. Unlike embodiment 1, in this embodiment, a detachable connection chain is provided between the baffle plates. The distances between the front end baffle and the rear end baffle which are arranged in the pipe section and the welding port are respectively 60mm.
After the welding is finished by using the device, the device is pulled out from one side after the welding seam is cooled.
To sum up, the utility model provides a pipeline welding local inflation protection device, which comprises a front end rubber round baffle plate, a rear end rubber round baffle plate, two side clamping plates and an air inlet pipe, and is characterized in that the outer diameter of the baffle plate is 6mm larger than the inner diameter of the pipeline, and the ovality error is controlled to be +/-2 mm; the opening of the air inlet pipe of the front end baffle is close to the edge and rotates to the bottom during construction; the centers of the clamping plates at the two sides far away from the welding port are fixedly connected with a pull rope. The utility model discloses a device can carry out local gassing to the welding seam, and structure and size reasonable in design are sealed effectual, save the protection gas, and exhaust efficiency is high, and the availability factor of device is high, and the wearing and tearing of sealing member are little.
It should be understood by those skilled in the art that the above embodiments may be combined with the prior art to realize the modifications, and the detailed description is omitted here. Such variations do not affect the essence of the present invention, and are not described herein.
The above description is that of the preferred embodiment of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that devices and structures not described in detail are understood to be implemented in a manner common in the art; without departing from the scope of the invention, it is intended that the present invention shall not be limited to the above-described embodiments, but that the present invention shall include all the modifications and variations of the embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still fall within the protection scope of the technical solution of the present invention, where the technical entity does not depart from the content of the technical solution of the present invention.
Claims (8)
1. A pipeline welding local inflation protection device comprises a front rubber round baffle and a rear rubber round baffle; clamping plates are arranged on two sides of the baffle; the opening of the front end rubber round baffle is connected with an air inlet pipe; the rear end rubber round baffle keeps airtight; it is characterized in that the preparation method is characterized in that,
the outer diameter of the baffle is 6mm larger than the inner diameter of the pipeline, and the ovality error is controlled to be +/-2 mm;
an opening of an air inlet pipe of the front end rubber round baffle is close to the edge, the front end rubber round baffle rotates to the bottom during construction, and the length of the air inlet pipe is enough to extend out of the pipeline;
the clamping plate and the baffle plate are fixedly fastened through a plurality of pairs of split bolts which are axially and symmetrically distributed;
the center of the clamping plates at the two sides far away from the welding port is fixedly connected with a pull rope, and the length of the pull rope is enough to extend out of the pipeline.
2. The local inflation protection device for pipeline welding of claim 1, wherein a detachable connecting chain is arranged between the baffles.
3. The local gas-filled protection device for pipeline welding of claim 1 or 2, wherein the thickness of the baffle plate is 50mm.
4. The local gas-filled protection device for the welding of the pipeline as claimed in claim 1 or 2, wherein the clamping plate is a galvanized steel plate with the thickness of 2 mm.
5. The local gas-filled protection device for pipe welding of claim 4, wherein the diameter of the galvanized steel sheet is 30mm smaller than that of the baffle plate.
6. The local inflation protection device for pipeline welding of claim 1, wherein the front rubber circular baffle and the rear rubber circular baffle are arranged in the pipe sections at two sides of the welding opening, the distance from the front rubber circular baffle to the welding opening is 40-80 mm, and the distance from the rear rubber circular baffle to the welding opening is 40-80 mm.
7. The local inflation protection device for pipeline welding of claim 1, wherein the pull rope is a thin steel rope with a diameter of 6 mm.
8. The local inflation protection device for pipeline welding of claim 1, wherein the air inlet pipe is a hose with a diameter of 10mm, and the hose is sealed by a sealant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220996466.1U CN218476138U (en) | 2022-04-27 | 2022-04-27 | Pipeline welding local inflation protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220996466.1U CN218476138U (en) | 2022-04-27 | 2022-04-27 | Pipeline welding local inflation protection device |
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| Publication Number | Publication Date |
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| CN218476138U true CN218476138U (en) | 2023-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220996466.1U Active CN218476138U (en) | 2022-04-27 | 2022-04-27 | Pipeline welding local inflation protection device |
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