CN111604573A - Protective gas plugging tool for butt welding of steel pipes - Google Patents
Protective gas plugging tool for butt welding of steel pipes Download PDFInfo
- Publication number
- CN111604573A CN111604573A CN202010343549.6A CN202010343549A CN111604573A CN 111604573 A CN111604573 A CN 111604573A CN 202010343549 A CN202010343549 A CN 202010343549A CN 111604573 A CN111604573 A CN 111604573A
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- Prior art keywords
- plugging
- steel pipes
- butt welding
- steel pipe
- welding
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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
- B23K9/32—Accessories
- B23K9/325—Devices for supplying or evacuating shielding gas
- B23K9/326—Purge gas rings, i.e. devices for supplying or evacuating shielding gas inside of hollow or tubular articles, e.g. pipes, vessels
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a protective gas plugging tool for butt welding of steel pipes, which comprises a first plugging component and a second plugging component, wherein the first plugging component comprises a first rigid supporting plate and a first rubber sealing element, and the excircle of the first rubber sealing element is in sealing fit with the inner diameter of the steel pipe; the second plugging assembly comprises a second rigid supporting plate and a second rubber sealing piece, and the excircle of the second rubber sealing piece is in sealing fit with the inner diameter of the steel pipe; one of the first plugging component and the second plugging component is provided with an air exhaust port, and the other plugging component is provided with an argon diffusion pipe and an argon inlet pipeline communicated with the argon diffusion pipe; the first plugging component and the second plugging component are respectively arranged in inner holes at two sides of a butt joint seam of the steel pipe, the steel pipe is horizontally arranged, the air exhaust port is located at the upper side part of the inner diameter of the steel pipe, and the argon diffusion pipe is located at the lower side part of the inner diameter of the steel pipe. The invention improves the quality of butt welding of the steel pipes.
Description
Technical Field
The invention relates to the technical field of welding process equipment, in particular to a protective gas plugging tool for butt welding of steel pipes.
Background
When welding the pipeline made of easily oxidized metal and special steel, inert gas is filled in the pipeline for protection so as to prevent the weld joint in the pipeline from being oxidized. Particularly, in the construction of oil tankers/chemical tankers, a large number of butt-joint girth welds of stainless steel pipes need to be welded by argon arc welding. In order to prevent the formed welding seam in the pipe from being oxidized, the two ends of the pipe are required to be blocked and the pipe is filled with argon to protect, particularly, the stainless steel liquid cargo pipe of a chemical ship has strict requirements on the formed color of the welding seam in the pipe, and the oxygen content of the welding seam must be less than 50 ppm.
Generally, the simplest method for inflation protection in a stainless steel pipe is to cut sponge with corresponding specifications according to the pipe diameter, insert an inflation pipe, plug the inflation pipe into the pipe to be close to two sides of a welding line for plugging and inflation protection, and because the sponge is hollow, when argon enters the pipe for replacing air, one part of the sponge can be directly discharged out of the pipe, the sponge cannot effectively achieve the effect of integral extrusion of the air, the replacement time is too long, and the argon consumption is increased.
Disclosure of Invention
In order to solve the problems, the invention provides a protective gas plugging tool for butt welding of steel pipes, and aims to improve the quality of the butt welding of the steel pipes. The specific technical scheme is as follows:
a protective gas plugging tool for butt welding of steel pipes comprises a first plugging assembly and a second plugging assembly, wherein the first plugging assembly comprises a first rigid supporting plate and a first rubber sealing element connected to the first rigid supporting plate, and the excircle of the first rubber sealing element is in sealing fit with the inner diameter of a steel pipe; the second plugging assembly comprises a second rigid supporting plate and a second rubber sealing element connected to the second rigid supporting plate, and the excircle of the second rubber sealing element is in sealing fit with the inner diameter of the steel pipe; one of the first plugging component and the second plugging component is provided with an air exhaust port, and the other of the first plugging component and the second plugging component is provided with an argon diffusion pipe and an argon inlet pipeline communicated with the argon diffusion pipe; the first blocking component and the second blocking component are respectively arranged in inner holes at two sides of a butt joint seam of the steel pipe, the steel pipe is horizontally arranged, the air exhaust port is located at the upper side part of the inner diameter of the steel pipe, and the argon diffusion pipe is located at the lower side part of the inner diameter of the steel pipe.
Preferably, the number of the first rigid support plates is one pair, and a space ring is arranged between the pair of the first rigid support plates and is fixed by a plurality of tensioning bolts.
Preferably, the number of the second rigid support plates is one pair, and a space ring is arranged between the pair of the second rigid support plates and is fixed by a plurality of tensioning bolts.
When the device is used, a steel pipe to be welded is butted and positioned according to requirements, the first plugging component and the second plugging component are respectively plugged into proper positions in the pipe, protective gas (argon) is flushed from an argon inlet pipeline and enters the pipe through an argon diffusion pipe, the air exhaust port is used for exhausting redundant air, and continuous argon is supplied for protecting the welding quality of a welding seam.
Preferably, the first rigid support plate and the second rigid support plate are respectively provided with a U-shaped handle.
As a further improvement of the invention, the first plugging assembly and the second plugging assembly are respectively fixed relative to the steel pipe through a plugging assembly fixer, and a welding seam hammering assembly which performs compression impact on the butt welding seam of the steel pipe through an impact cylinder and a hammering rod is connected between the first plugging assembly and the second plugging assembly.
As a preferred scheme of the welding seam hammering assembly in the invention, the welding seam hammering assembly comprises the impact cylinder and a hammering rod, one end of the hammering rod is connected with a U-shaped fork shaft, the first rigid support plate is provided with a pair of fork shaft supporting holes, the second rigid support plate is provided with a hammering rod supporting hole, two shaft heads of the U-shaped fork shaft penetrate through the pair of fork shaft supporting holes and then are connected with an impact plate, the other end of the hammering rod penetrates through the hammering rod supporting hole and then is connected with a nut in a threaded manner, a cylinder seat of the impact cylinder is fixed on the first rigid support plate, and an impact head of the impact cylinder vertically points to the impact plate.
As one of the preferable schemes of the plugging component fixer in the present invention, the plugging component fixer is a plurality of spot welding blocks, and the spot welding blocks fix the first rigid support plate and the second rigid support plate on the inner wall of the steel pipe by spot welding respectively.
As a second preferred embodiment of the plugging component fixer in the present invention, the plugging component fixer is a plurality of draw hooks respectively connected to the first rigid support plate, bends of the draw hooks hook orifices of the steel pipes, and the bends of the draw hooks are further provided with tightening screws.
Preferably, the first rubber seal and the second rubber seal are rubber plates.
The working principle of the invention is as follows:
the inflation protection principle is as follows: the argon gas is used for being larger than air in specific gravity, and laminar gas is sprayed out through the argon gas diffusion pipe according to the principle of low inlet and high outlet, so that the air in the pipe can be extruded out quickly and effectively, and the optimal protection effect is achieved.
Welding seam hammering principle: after welding, the impact cylinder is started, under the action of the impact cylinder, the two butt-joint steel pipes are axially and relatively extruded, the welding seam between the two steel pipes is subjected to impact compression, namely the welding seam is subjected to axial hammering, the hammering stress-relief effect on the welding seam is formed, and the welding quality is also improved.
The invention has the beneficial effects that:
first, compared with the traditional sponge plugging tool, the shielding gas plugging tool for butt welding of the steel pipes saves the consumption of argon, improves the working efficiency and reduces the production cost.
Secondly, the shielding gas plugging tool for butt welding of the steel pipes is provided with the welding seam hammering assembly, so that uniform hammering of butt ring welding seams is realized, the welding seam quality can be effectively improved, and compared with the traditional manual uneven hammering mode after welding, the shielding gas plugging tool has the advantages of better welding seam stress removing effect, less welding deformation, higher automation degree and better guarantee of the welding seam stress removing quality.
Drawings
FIG. 1 is a schematic structural diagram of a shielding gas plugging tool for butt welding of steel pipes, according to the present invention;
FIG. 2 is an enlarged partial view of the left side portion of FIG. 1;
FIG. 3 is an enlarged partial view of the right side portion of FIG. 1;
fig. 4 is a schematic structural view of fixing a rigid support plate using spot welding blocks.
In the figure: 1. the device comprises a first plugging component, a second plugging component, a first rigid supporting plate, a second plugging component, a third rigid supporting plate, a fourth rigid supporting plate, a fifth rigid supporting plate, a sixth rigid supporting plate, a fifth rigid supporting plate, a sixth rigid supporting; 11. butt joint seam, 12, spacer ring, 13, tensioning bolt, 14, U-shaped handle, 15, plugging component fixer, 16, impact cylinder, 17, hammering rod, 18, welding seam hammering component, 19, U-shaped fork shaft, 20, impact plate, 21, nut, 22, draw hook, 23, tightening screw, 24 and spot welding block.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Fig. 1 to 4 show an embodiment of a shielding gas plugging tool for butt welding of steel pipes according to the present invention, which includes a first plugging component 1 and a second plugging component 2, where the first plugging component 1 includes a first rigid supporting plate 3 and a first rubber sealing member 4 connected to the first rigid supporting plate 3, and an outer circle of the first rubber sealing member 4 is in sealing fit with an inner diameter of a steel pipe 5; the second plugging assembly 2 comprises a second rigid supporting plate 6 and a second rubber sealing element 7 connected to the second rigid supporting plate 6, and the excircle of the second rubber sealing element 7 is in sealing fit with the inner diameter of the steel pipe 5; one of the first plugging component 1 and the second plugging component 2 is provided with an air exhaust port 8, and the other of the first plugging component 1 and the second plugging component 2 is provided with an argon diffusion pipe 9 and an argon inlet pipeline 10 communicated with the argon diffusion pipe 9; first shutoff subassembly 1, second shutoff subassembly 2 divide arrange steel pipe butt joint seam 11's both sides hole in, 5 levels of steel pipe set up, just air vent 8 is located 5 internal diameters of steel pipe lean on the upside position, argon gas diffusion tube 9 is located 5 internal diameters of steel pipe lean on the downside position.
Preferably, the number of the first rigid support plates 3 is one pair, and a space ring 12 is arranged between the pair of first rigid support plates 3 and fixed by a plurality of tension bolts 13.
Preferably, the number of the second rigid support plates 6 is one pair, and a space ring 12 is arranged between the pair of second rigid support plates 6 and fixed by a plurality of tension bolts 13.
When the device is used, a steel pipe 5 to be welded is firstly butted and positioned according to requirements, the first plugging component 1 and the second plugging component 2 are respectively plugged into proper positions in the pipe, protective gas (argon) is flushed from an argon inlet pipeline 10 and enters the pipe through an argon diffusion pipe 9, the air exhaust port 8 is used for exhausting redundant air, and continuous argon is supplied for protecting the welding quality of a welding seam.
Preferably, the first rigid support plate 3 and the second rigid support plate 4 are respectively provided with a U-shaped handle 14.
As a further improvement of this embodiment, the first plugging assembly 1 and the second plugging assembly 2 are respectively fixed to the steel pipe 5 by a plugging assembly holder 15, and a weld hammering assembly 18 for performing compression impact on the butt weld 11 of the steel pipe 5 through an impact cylinder 16 and a hammering rod 17 is connected between the first plugging assembly 1 and the second plugging assembly 2.
As a preferable scheme of the weld hammering assembly 18 in this embodiment, the weld hammering assembly 18 includes the impact cylinder 16 and the hammer rod 17, one end of the hammer rod 17 is connected to a U-shaped fork shaft 19, the first rigid support plate 3 is provided with a pair of fork shaft supporting holes, the second rigid support plate 6 is provided with a hammer rod supporting hole, two shaft heads of the U-shaped fork shaft 19 penetrate through the pair of fork shaft supporting holes and then are connected to an impact plate 20, the other end of the hammer rod 17 penetrates through the hammer rod supporting hole and then is connected to a nut 21 in a threaded manner, a cylinder block of the impact cylinder 16 is fixed on the first rigid support plate 3, and an impact head of the impact cylinder 16 vertically points to the impact plate 20.
As one of the preferable solutions of the plugging member holder in this embodiment, the plugging member holder 15 is a plurality of spot welding blocks 24, and the spot welding blocks 24 fix the first rigid support plate 3 and the second rigid support plate 6 on the inner wall of the steel pipe 5 by spot welding, respectively.
As a second preferred embodiment of the plugging component fixer in this embodiment, the plugging component fixer 15 is a plurality of draw hooks 22 respectively connected to the first rigid support plate 3, an elbow of each draw hook 22 hooks an orifice of the steel pipe 5, and a jacking screw 23 is further disposed on the elbow of each draw hook 22.
Preferably, the first rubber seal 4 and the second rubber seal 7 are rubber plates.
The working principle of the embodiment is as follows:
the inflation protection principle is as follows: the argon gas is used for being larger than air in specific gravity, and laminar gas is sprayed out through the argon gas diffusion pipe 9 according to the principle of low inlet and high outlet, so that the air in the pipe can be extruded out quickly and effectively, and the optimal protection effect is achieved.
Welding seam hammering principle: after welding, the impact cylinder 16 is started, under the action of the impact cylinder 16, the two butt-jointed steel pipes 5 are axially and relatively extruded, and a welding seam between the two steel pipes 5 is subjected to impact compression, namely the welding seam is subjected to axial hammering, so that a hammering stress-relief effect on the welding seam is formed, and the welding quality is also improved.
The beneficial effect of this embodiment is:
first, the protective gas plugging tool for butt welding of steel pipes of this embodiment saves the consumption of argon gas, improves work efficiency, and reduces production cost for traditional sponge plugging tool.
Second, a protection gas shutoff frock for steel pipe butt welding of this embodiment is provided with welding seam hammering subassembly 18, has realized the even hammering of butt ring welding seam, can effectively improve the welding seam quality, and compares the manual inhomogeneous hammering mode of traditional postweld, and its welding seam destressing effect is better, welding deformation is few, and degree of automation is higher, and the quality of welding seam destressing more can obtain guaranteeing.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A protective gas plugging tool for butt welding of steel pipes is characterized by comprising a first plugging assembly and a second plugging assembly, wherein the first plugging assembly comprises a first rigid supporting plate and a first rubber sealing element connected to the first rigid supporting plate, and the excircle of the first rubber sealing element is in sealing fit with the inner diameter of a steel pipe; the second plugging assembly comprises a second rigid supporting plate and a second rubber sealing element connected to the second rigid supporting plate, and the excircle of the second rubber sealing element is in sealing fit with the inner diameter of the steel pipe; one of the first plugging component and the second plugging component is provided with an air exhaust port, and the other of the first plugging component and the second plugging component is provided with an argon diffusion pipe and an argon inlet pipeline communicated with the argon diffusion pipe; the first blocking component and the second blocking component are respectively arranged in inner holes at two sides of a butt joint seam of the steel pipe, the steel pipe is horizontally arranged, the air exhaust port is located at the upper side part of the inner diameter of the steel pipe, and the argon diffusion pipe is located at the lower side part of the inner diameter of the steel pipe.
2. The shielding gas plugging tool for butt welding of steel pipes according to claim 1, wherein the number of the first rigid support plates is one pair, and a spacer ring is arranged between the pair of first rigid support plates and fixed by a plurality of tensioning bolts.
3. The shielding gas plugging tool for butt welding of steel pipes according to claim 1, wherein the number of the second rigid support plates is one pair, and a spacer ring is arranged between the pair of second rigid support plates and fixed through a plurality of tensioning bolts.
4. The shielding gas plugging tool for butt welding of steel pipes according to claim 1, wherein the first rigid support plate and the second rigid support plate are respectively provided with a U-shaped handle.
5. The shielding gas sealing tool for butt welding of the steel pipes according to claim 1, wherein the first sealing assembly and the second sealing assembly are fixed relative to the steel pipes through sealing assembly fixtures respectively, and a welding line hammering assembly for performing compression impact on butt welding lines of the steel pipes through an impact cylinder and a hammering rod is connected between the first sealing assembly and the second sealing assembly.
6. The shielding gas blocking tool for butt welding of steel pipes according to claim 5, wherein the welding seam hammering assembly comprises the impact cylinder and a hammering rod, one end of the hammering rod is connected with a U-shaped fork shaft, a pair of fork shaft supporting holes are formed in the first rigid supporting plate, a hammering rod supporting hole is formed in the second rigid supporting plate, two shaft heads of the U-shaped fork shaft penetrate through the pair of fork shaft supporting holes and then are connected with an impact plate, the other end of the hammering rod penetrates through the hammering rod supporting holes and then is connected with a nut in a threaded mode, a cylinder seat of the impact cylinder is fixed on the first rigid supporting plate, and an impact head of the impact cylinder vertically points to the impact plate.
7. The shielding gas plugging tool for butt welding of steel pipes according to claim 5, wherein the plugging component holders are a plurality of spot welding blocks, and the spot welding blocks fix the first rigid support plate and the second rigid support plate on the inner wall of the steel pipe through spot welding respectively.
8. The shielding gas plugging tool for butt welding of steel pipes according to claim 5, wherein the plugging component holders are a plurality of drag hooks respectively connected to the first rigid support plate, the elbows of the drag hooks hook the orifices of the steel pipes, and the elbows of the drag hooks are further provided with tightening screws.
9. The shielding gas plugging tool for butt welding of steel pipes according to claim 1, wherein the first rubber sealing element and the second rubber sealing element are rubber plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010343549.6A CN111604573A (en) | 2020-04-27 | 2020-04-27 | Protective gas plugging tool for butt welding of steel pipes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010343549.6A CN111604573A (en) | 2020-04-27 | 2020-04-27 | Protective gas plugging tool for butt welding of steel pipes |
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| CN111604573A true CN111604573A (en) | 2020-09-01 |
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| CN202010343549.6A Pending CN111604573A (en) | 2020-04-27 | 2020-04-27 | Protective gas plugging tool for butt welding of steel pipes |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112222576A (en) * | 2020-12-17 | 2021-01-15 | 成都裕鸢航空零部件制造有限公司 | Argon tungsten-arc welding method and welding tool capable of preventing weld joint from being oxidized |
| CN113770496A (en) * | 2021-09-01 | 2021-12-10 | 沪东中华造船(集团)有限公司 | Ship fuel pipe welding inflation device and use method thereof |
| CN113927135A (en) * | 2021-11-18 | 2022-01-14 | 沪东中华造船(集团)有限公司 | Method and device for realizing butt argon arc welding plugging of copper-nickel alloy pipe |
| CN114669952A (en) * | 2022-03-18 | 2022-06-28 | 中国水电四局（兰州）机械装备有限公司 | Pressure steel pipe installation group is to inner joint welding frame convenient to dismouting |
| CN117506256A (en) * | 2023-12-22 | 2024-02-06 | 山东恒辉节能技术集团有限公司 | welding device |
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| CN113927135A (en) * | 2021-11-18 | 2022-01-14 | 沪东中华造船(集团)有限公司 | Method and device for realizing butt argon arc welding plugging of copper-nickel alloy pipe |
| CN114669952A (en) * | 2022-03-18 | 2022-06-28 | 中国水电四局（兰州）机械装备有限公司 | Pressure steel pipe installation group is to inner joint welding frame convenient to dismouting |
| CN114669952B (en) * | 2022-03-18 | 2024-04-19 | 中国水电四局（兰州）机械装备有限公司 | Pressure steel pipe installation group is to internal seam welded frame convenient to dismouting |
| CN117506256A (en) * | 2023-12-22 | 2024-02-06 | 山东恒辉节能技术集团有限公司 | welding device |
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Application publication date: 20200901 |