CN210587586U - Argon filling protection device for welding back of stainless steel or dissimilar steel branch pipe - Google Patents
Argon filling protection device for welding back of stainless steel or dissimilar steel branch pipe Download PDFInfo
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- CN210587586U CN210587586U CN201921057244.8U CN201921057244U CN210587586U CN 210587586 U CN210587586 U CN 210587586U CN 201921057244 U CN201921057244 U CN 201921057244U CN 210587586 U CN210587586 U CN 210587586U
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Abstract
The utility model relates to a stainless steel or xenogenesis steel branch pipe welding back argon filling protection device, but the wide application is in the stainless steel of each trade or xenogenesis steel welding. The upper end of the sliding rod is connected with the handle, the lower part of the sliding rod passes through a circular tube sliding rail, and a threaded hole is formed in the end, close to the handle, of the circular tube sliding rail and is in threaded connection with the fastening screw; the circular tube slide rail is connected with two ends of a gas distribution pipe, the gas distribution pipe is connected with the circular cover plate through welding, rectangular slotted holes are uniformly formed in the positions of 0-180 degrees along the circumference by taking the circle center of the circular cover plate as the center, a plurality of holes are uniformly drilled in the gas distribution pipe on the lower portion of the circular cover plate along the circumference, and an argon inlet pipe is welded in the gas distribution pipe on the upper portion of the circular cover plate; the lower end of the sliding rod is connected with a bolt, and the bolt penetrates through the rubber piston pad and the gasket and is screwed up and connected with the nut. The utility model provides a set of be suitable for, economy, convenient, reliable stainless steel or xenogenesis steel branch pipe welding back argon filling protection device improves branch pipe welding quality.
Description
Technical Field
The utility model relates to a stainless steel or xenogenesis steel branch pipe welding back argon filling protection device, but the wide application is in the stainless steel of each trade or xenogenesis steel welding.
Background
The welding activities of the major repair, the technical improvement and the daily inspection and maintenance of an operating power plant account for more than 80 percent of the welding activities for welding stainless steel parts, wherein a welding method adopted by a large number of stainless steel branch pipes (such as BOSS and pipe-pipe) is manual tungsten argon arc welding (also called manual TIG welding), and when the stainless steel branch pipes are manual TIG backing welding or single-side welding double-side forming welding method, if the back of the welding seam of the branch pipe is in contact with air, a bean curd residue welding seam (causing oxidation, slag formation, multiple holes or honeycomb defects) is formed on the near surface of the welding seam of the back part, so that the welding quality of the root part of a joint is directly influenced, the strength and the toughness of the welding seam are influenced, the intergranular corrosion performance is also. Therefore, in order to prevent oxidation and slag formation at the back of the welding seam of the stainless steel branch pipe and ensure the welding quality at the back of the welding seam of the stainless steel branch pipe, argon filling protection must be carried out at the back of the welding seam before welding. In order to ensure the welding quality of the back of the branch pipe welding seam, stainless steel or dissimilar steel branch pipe welding is implemented, and the following three back argon filling protection methods are generally (conventionally) adopted.
The method comprises the following steps: single side argon filling
The single-side argon filling method is characterized in that argon is filled from an inlet of a branch pipe, and the argon slowly passes through a weld groove and a main pipe by means of diffused argon flow, so that the purpose of argon filling protection of the back of a weld of the branch pipe is achieved. However, the argon filling method has limitations or disadvantages, such as being susceptible to residual gas flow and gas pressure in the mother pipe, so that argon filling at the back of the branch pipe weld joint is unstable or cannot reach argon filling protection, thereby affecting the welding quality at the root of the branch pipe.
The second method comprises the following steps: establishing a closed air cavity and filling argon
And establishing an argon filling principle of a closed air cavity, namely establishing a local closed space (two ends of the main pipe are blocked) for back argon filling (argon filling from the branch pipe) by taking effective measures at the back of a welding line before the branch pipe is welded. The argon filling mode is used for carrying out back argon filling protection in a mode of establishing a closed air cavity in the main pipe to which the branch pipe belongs, is unsafe and unreliable, easily causes foreign matters in a pipeline, is only limited to be prefabricated in a workshop for use, and is difficult to implement in an overhaul site of an operating power plant.
The third method comprises the following steps: whole tube argon filling
In a branch pipe welding site, valves at two ends of a branch pipe and a main pipe are found, and the whole pipeline is filled with argon by closing the valves at the two ends of the pipeline. The whole-pipe argon filling mode is adopted, valves arranged at two ends of a pipeline need to be found, if the two ends of the pipeline are not provided with valves which can be closed, the mode cannot be conducted, and the argon filling mode can cause great argon waste, and is high in cost and uneconomical.
In summary, the three methods for protecting the back of the stainless steel or dissimilar steel branch pipe by argon filling all have shortcomings or limitations. Therefore, from the viewpoints of economy, practicability and reliability, the argon filling protection device at the back of the stainless steel or dissimilar steel branch pipe welding is urgently researched and developed, and is applicable, economical, convenient and reliable.
Disclosure of Invention
For satisfying the stainless steel of operation power plant or xenogenesis steel branch pipe welding demand to from company's cost reduction increase angle, the utility model provides a one set of suitable, economy, convenient, reliable stainless steel or xenogenesis steel branch pipe welding back argon filling protection device improves branch pipe welding quality.
In order to achieve the above purpose, the utility model adopts the technical proposal that:
a kind of stainless steel or dissimilar steel branch pipe welds the back and fills the argon protective device, including: the device comprises a handle, a slide rod, a circular tube slide rail, a fastening screw, a gas distribution pipe, an argon inlet pipe, a circular cover plate, a bolt, a nut, a rubber piston pad and a gasket; the upper end of the sliding rod is connected with the handle, the lower part of the sliding rod passes through a circular tube sliding rail, and a threaded hole is formed in the end, close to the handle, of the circular tube sliding rail and is in threaded connection with the fastening screw; the circular tube slide rail is connected with two ends of a gas distribution pipe, the gas distribution pipe is connected with the circular cover plate through welding, rectangular slotted holes are uniformly formed in the positions of 0-180 degrees along the circumference by taking the circle center of the circular cover plate as the center, a plurality of holes are uniformly drilled in the gas distribution pipe on the lower portion of the circular cover plate along the circumference, and an argon inlet pipe is welded in the gas distribution pipe on the upper portion of the circular cover plate; the lower end of the sliding rod is connected with a bolt, and the bolt penetrates through the rubber piston pad and the gasket and is screwed up and connected with the nut.
The sliding rod is made of stainless steel welding wires with the diameter of 1.6 mm.
The upper end of the sliding rod is connected with the handle in a welding mode.
The circular tube slide rail is connected with the two ends of the gas distribution pipe in a sealing welding mode.
Rectangular slotted holes with the width of 2mm are uniformly formed at the positions of 0-180 degrees along the circumference by taking the circle center of the circular cover plate as the center.
And uniformly drilling a plurality of phi 2mm holes on the gas distribution pipe at the lower part of the circular cover plate along the circumference.
The lower end of the sliding rod is connected with the bolt in a welding mode.
The utility model discloses the beneficial effect who gains does:
the utility model discloses a research according to the on-the-spot actual welding demand of engineering, its application has thoroughly solved the problem that the difficulty was implemented in stainless steel or xenogenesis steel branch pipe welding back argon filling protection in the engineering, has compensatied the short slab that conventional stainless steel or xenogenesis steel branch pipe welding back argon filling protection is not enough or the limitation. The utility model discloses a performance safe and reliable, on-the-spot easy dismounting, engineering result of use are good, the manufacturing technology is mature, low in manufacturing cost, economic benefits is big, and to the compatibility of different branch pipe sizes fabulous, but the wide application is in the stainless steel or the xenogenesis steel welding of each trade.
The utility model discloses the argon filling protection device in stainless steel or xenogenesis steel branch pipe welding back of development is full research, has analyzed operation unit overhaul, technical improvement and daily maintenance welding current situation of examining and repairing. By deeply researching the structure, shape and size of the welded object, the utility model of a practical branch pipe welding back argon filling protection device is developed. The device is designed to be composed of a plurality of precise parts, the precise parts are arranged in a welded branch pipe part to form a local small closed space, and then argon is fed into the device (the back of a welding line) from an argon inlet pipe of the device. Because argon is an ideal protective gas, the density of the protective gas is 25% higher than that of air, the filled argon can replace the air in the device completely, the air can be firmly isolated outside a welding area after the argon is filled to saturation, the oxidation of the welding area is prevented, and therefore the purpose of protecting the back of the welding line of the stainless steel or dissimilar steel branch pipe is achieved, and the welding quality of the branch pipe is guaranteed.
The utility model discloses use and get the effect to show among the welding production, solved the problem of stainless steel or xenogenesis steel branch pipe welding back argon filling protection difficulty in the puzzlement engineering always.
(1) Standardized production and mature manufacturing process
The utility model discloses a according to branch pipe weldment structure and size, designed standard drawing, but complete set manufacturing, production, its preparation production technology is mature.
(2) Convenient installation and disassembly and low manufacturing cost
The utility model discloses an use the scene, its installation, dismantle convenient, use safe, reliable, and choose for use the material ordinary, low in manufacturing cost, for stainless steel or xenogenesis steel branch pipe welding ideal, economic back argon filling protection device in the engineering.
(3) Reduce welding cost and improve welding efficiency
The argon filling protection device is applied to the field, argon and argon filling time are greatly saved, welding time is saved, welding cost is greatly reduced, and welding efficiency is improved.
(4) Strong practicability and good welding effect
The argon filling protection device has strong engineering applicability and good argon filling protection stability, can obtain satisfactory branch pipe welding quality, and is a practical back argon filling protection device for stainless steel or dissimilar steel branch pipes in engineering.
Drawings
FIG. 1 is a structural diagram of a back argon filling protection device for stainless steel or dissimilar steel branch pipe welding;
FIG. 2 is a schematic diagram of the main structure of the argon filling protection device;
FIG. 3 is a schematic diagram of the trunk of the argon protection device II;
FIG. 4 is a branch-header pair diagram;
FIG. 5 is an installation view of the argon filling protection device;
in the figure: 1. a handle; 2. a slide bar; 3. a circular tube slide rail; 4. fastening screws; 5. a gas distribution tube; 6. an argon inlet tube; 7. a circular cover plate; 8. a bolt; 9. a nut; 10. a rubber piston pad; 11. a gasket; 12. solidifying the blocks; 13. a main pipe; 14. and (4) branch pipes.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-5, the argon-filled protection device for the back surface of the stainless steel or dissimilar steel branch pipe welding comprises: the device comprises a handle 1, a sliding rod 2, a circular tube sliding rail 3, a fastening screw 4, a gas distribution pipe 5, an argon inlet pipe 6, a circular cover plate 7, a bolt 8, a nut 9, a rubber piston pad 10 and a gasket 11.
The sliding rod 2 is made of stainless steel welding wires with phi of 1.6mm, the upper end of the sliding rod is connected with the handle 1 in a welded mode, the lower portion of the sliding rod 2 is connected with the round pipe sliding rail 3 through a round pipe sliding rail 3, a threaded hole is formed in the end, close to the handle 1, of the round pipe sliding rail 3 and in threaded connection with a fastening screw 4, the round pipe sliding rail 3 is connected with two ends of the gas distribution pipe 5 in a sealed welding mode, the gas distribution pipe 5 is provided with a rectangular slotted hole (shown in figure 2) with the width of 2mm uniformly along the position of 0-180 degrees of the circumference by taking the center of the circle of the round cover plate 7 as the center, the gas distribution pipe 5 is connected with the round cover plate 7 in a welded mode, the gas distribution pipe 5 is divided into a circle. The lower end of the sliding rod 2 is connected with a bolt 8 in a welding mode, and the bolt 8 penetrates through a rubber piston pad 10 and a gasket 11 and is connected with a nut 9 in a screwing mode.
The working process of the utility model is as follows:
step 1: the assembly of the branch pipe 14 and the main pipe 13 is firstly completed, and the welding point fixing blocks 12 are symmetrically welded along the circumferential direction of the welding end face of the branch pipe 14. After the branch pipe 14 and the main pipe 13 are fixed in a point mode, the argon filling protection device is inserted through an inlet of the branch pipe 14, the handle 1 is pressed down with force, when the rubber piston pad 10 penetrates through the inner side of the wall thickness of the main pipe 13, the handle 1 is lifted up to be adjusted, the rubber piston pad 10 seals the hole of the main pipe 13, then the fastening screw 4 is screwed down, and the whole device is fixed.
Step 2: argon is filled from an argon inlet pipe 6 and enters the gas distribution pipe 5, and the argon uniformly disperses through a plurality of holes on the gas distribution pipe 5 and enters a branch pipe 14 and a main pipe 13 to weld an inner gas cavity.
And 3, step 3: argon filling for a period of time for the inside air cavity air of replacement, the air of air intracavity is discharged to the clearance department from 7 rectangular slot holes of circular apron and branch pipe 14 and 13 group of female pipe, forms a pure argon gas protection environment in the air cavity, and accessible match stick is at 7 rectangular slot holes of circular apron or the mode of group ignition to clearance department this moment, and the inspection argon gas is sufficient.
And 4, step 4: and starting the welding of the branch pipe 14 and the main pipe 13, stopping argon filling protection until the thickness of the welded deposited metal reaches more than 4mm, loosening the fastening screw 4, lifting the handle 1 upwards, and taking out the argon filling protection device.
The utility model discloses, the on-the-spot BOSS branch pipe welding of overhaul has just solved the difficult "bone" of gnawing of on-the-spot branch pipe welding with high efficiency, high quality for the first time, has improved the one-time qualification rate of unit overhaul welding RT.
The argon filling protection device is designed to be composed of 11 precise parts, the parts and the parts are compact and reasonable in structure, materials are easy to obtain, the sizes of the parts are in series, the practicability is high, the manufacturing cost is low, the engineering using effect is good, and the benefit is large.
Claims (7)
1. The utility model provides a stainless steel or xenogenesis steel branch pipe welding back argon filling protection device which characterized in that: the method comprises the following steps: the device comprises a handle, a slide rod, a circular tube slide rail, a fastening screw, a gas distribution pipe, an argon inlet pipe, a circular cover plate, a bolt, a nut, a rubber piston pad and a gasket; the upper end of the sliding rod is connected with the handle, the lower part of the sliding rod passes through a circular tube sliding rail, and a threaded hole is formed in the end, close to the handle, of the circular tube sliding rail and is in threaded connection with the fastening screw; the circular tube slide rail is connected with two ends of a gas distribution pipe, the gas distribution pipe is connected with the circular cover plate through welding, rectangular slotted holes are uniformly formed in the positions of 0-180 degrees along the circumference by taking the circle center of the circular cover plate as the center, a plurality of holes are uniformly drilled in the gas distribution pipe on the lower portion of the circular cover plate along the circumference, and an argon inlet pipe is welded in the gas distribution pipe on the upper portion of the circular cover plate; the lower end of the sliding rod is connected with a bolt, and the bolt penetrates through the rubber piston pad and the gasket and is screwed up and connected with the nut.
2. The back argon-filling protection device for the branch pipe welding of stainless steel or dissimilar steel according to claim 1, characterized in that: the sliding rod is made of stainless steel welding wires with the diameter of 1.6 mm.
3. The back argon-filling protection device for the branch pipe welding of stainless steel or dissimilar steel according to claim 1, characterized in that: the upper end of the sliding rod is connected with the handle in a welding mode.
4. The back argon-filling protection device for the branch pipe welding of stainless steel or dissimilar steel according to claim 1, characterized in that: the circular tube slide rail is connected with the two ends of the gas distribution pipe in a sealing welding mode.
5. The back argon-filling protection device for the branch pipe welding of stainless steel or dissimilar steel according to claim 1, characterized in that: rectangular slotted holes with the width of 2mm are uniformly formed at the positions of 0-180 degrees along the circumference by taking the circle center of the circular cover plate as the center.
6. The back argon-filling protection device for the branch pipe welding of stainless steel or dissimilar steel according to claim 1, characterized in that: and uniformly drilling a plurality of phi 2mm holes on the gas distribution pipe at the lower part of the circular cover plate along the circumference.
7. The back argon-filling protection device for the branch pipe welding of stainless steel or dissimilar steel according to claim 1, characterized in that: the lower end of the sliding rod is connected with the bolt in a welding mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921057244.8U CN210587586U (en) | 2019-07-09 | 2019-07-09 | Argon filling protection device for welding back of stainless steel or dissimilar steel branch pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921057244.8U CN210587586U (en) | 2019-07-09 | 2019-07-09 | Argon filling protection device for welding back of stainless steel or dissimilar steel branch pipe |
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| CN210587586U true CN210587586U (en) | 2020-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110355448A (en) * | 2019-07-09 | 2019-10-22 | 福建福清核电有限公司 | Stainless steel or dissimilar steel branch pipe welding back side argon-filled protection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110355448A (en) * | 2019-07-09 | 2019-10-22 | 福建福清核电有限公司 | Stainless steel or dissimilar steel branch pipe welding back side argon-filled protection device |
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