Gas flow control device of steel pipe forming welding system
By combining the coarse and fine adjusters for the protected gas flow rate, the problem of inaccurate adjustment of traditional gas flow meters is solved, achieving precise adjustment of gas flow rate and improving welding quality while reducing gas waste.
Patent Information
- Application Number
- CN202423064665.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Traditional protective gas flow meters are difficult to adjust precisely, resulting in unstable welding quality and significant gas waste.
It employs a combination of a coarse and a fine adjuster for the protective gas flow, which are used for approximate and precise adjustment of the gas flow, respectively. Combined with multiple argon and hydrogen welding torches, it can adapt to different application scenarios.
It enables precise adjustment of gas flow, improves welding quality, reduces gas waste, and is easy to operate.
Smart Images
Figure CN223572181U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of welding gas flow control, especially to a gas flow control device of steel pipe forming and welding system. BACKGROUND
[0002] In the production process of steel pipe, the steel strip is first gradually bent and close to each other on both sides by a press roller to form a tubular shape, and then the splicing joint is welded. When welding the steel pipe, the splicing joint is welded by a welding gun on one side, and nitrogen gas is blown to the splicing joint to be welded from the inside of the steel pipe through an internal blowing pipe on the other side to avoid the oxidation and blackening of the weld. In addition, argon gas is also sprayed as a protective gas during argon arc welding, and a mixture of argon and hydrogen gas can be used for plasma welding. In order to ensure the welding quality and reduce the waste of protective gas, the appropriate protective gas flow needs to be selected for different specifications of steel pipes. However, the traditional protective gas flow controller uses single flow adjustment, which is difficult to fine-tune during operation and has a large flow error. SUMMARY
[0003] The purpose of the utility model is to provide a gas flow control device of steel pipe forming and welding system, which is more accurate and fast in adjusting the flow of protective gas and internal blowing gas required for steel pipe welding.
[0004] To achieve the above purpose, the utility model provides a gas flow control device of steel pipe forming and welding system, which comprises a protective gas flow coarse adjuster, a protective gas flow fine adjuster and a welding gun connected in series along the flow direction of the welding protective gas, and further comprises an internal blowing protective gas flow coarse adjuster, an internal blowing protective gas flow fine adjuster and an internal blowing pipe connected in series along the flow direction of the internal blowing protective gas. The gas outlet of the internal blowing pipe is located on the inside of the steel pipe and faces the splicing joint of the steel pipe.
[0005] As a further improvement of the utility model, the welding protective gas comprises argon, the welding gun comprises an argon arc welding gun, the protective gas flow coarse adjuster comprises an argon gas coarse adjuster, the protective gas flow fine adjuster comprises an argon gas fine adjuster, and the argon gas coarse adjuster, the argon gas fine adjuster and the argon arc welding gun are connected in series along the flow direction of the argon gas through a pipeline.
[0006] As a further improvement of the utility model, the number of the argon gas coarse adjuster, the argon gas fine adjuster and the argon arc welding gun is two or more.
[0007] As a further improvement of the utility model, the welding protective gas is a mixture of hydrogen and argon, the welding gun comprises a plasma welding gun, the protective gas flow coarse adjuster comprises a mixed gas coarse adjuster, the protective gas flow fine adjuster comprises a mixed gas fine adjuster, and the mixed gas coarse adjuster, the mixed gas fine adjuster and the plasma welding gun are connected in series along the flow direction of the mixed gas through a pipeline.
[0008] As a further improvement of the utility model, the protective gas flow coarse adjuster is installed on the first box body, and the protective gas flow fine adjuster is installed on the second box body.
[0009] Advantages
[0010] Compared with the prior art, the gas flow control device of the steel pipe forming and welding system has the following advantages:
[0011] 1. When the inner blowing protective gas flow of the inner blowing pipe needs to be adjusted, the approximate range is adjusted through the inner blowing protective gas flow coarse adjuster, and then the fine adjustment of the flow is performed through the blowing protective gas flow fine adjuster; similarly, the protective gas flow of the welding gun is also adjusted through the protective gas flow coarse adjuster and the protective gas flow fine adjuster in sequence. This adjustment mode only needs to operate the flow fine adjuster when the replaced steel pipe has little difference in specification or the flow error needs to be corrected, and only when the replaced steel pipe has large difference in specification, the flow coarse adjuster and the flow fine adjuster need to be operated in sequence, so that the flow adjustment is more accurate and the operation is more convenient.
[0012] 2. The number of the argon gas coarse adjuster, the argon gas fine adjuster and the argon arc welding gun is two or more, which can be adjusted individually to adapt to different use scenarios.
[0013] 3. The protective gas flow coarse adjuster is installed on the first box body, and the protective gas flow fine adjuster is installed on the second box body, so that unified management and maintenance are facilitated.
[0014] The utility model will become more clear through the following description and combining with the drawings, these drawings are used to explain the embodiments of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without paying creative labor for the ordinary skilled in the art.
[0016] Figure 1 It is the principle diagram of the gas flow control device of the steel pipe forming and welding system. DETAILED DESCRIPTION
[0017] Now the embodiments of the utility model will be described with reference to the drawings.
[0018] EMBODIMENT
[0019] The specific implementation mode of the utility model is as follows Figure 1As shown, a gas flow control device of a steel pipe forming and welding system includes a protective gas flow coarse adjuster, a protective gas flow fine adjuster, and a welding torch connected in series along the flow direction of the welding protective gas; and an inner blowing protective gas flow coarse adjuster 31, an inner blowing protective gas flow fine adjuster 32, and an inner blowing pipe 6 connected in series along the flow direction of the inner blowing protective gas. The gas outlet of the inner blowing pipe 6 is located on the inner side of the steel pipe 7 and faces the joint of the steel pipe 7. The welding torch faces the outer side of the joint of the steel pipe 7.
[0020] In this embodiment, the inner blowing protective gas is nitrogen. The inner blowing pipe 6 blows nitrogen towards the joint of the steel pipe 7 to prevent the weld from being oxidized and blackened.
[0021] The welding protective gas includes argon. The welding torch includes an argon arc welding torch 4. The protective gas flow coarse adjuster includes an argon gas coarse adjuster 11. The protective gas flow fine adjuster includes an argon gas fine adjuster 12. The argon gas coarse adjuster 11, the argon gas fine adjuster 12, and the argon arc welding torch 4 are connected in series along the flow direction of the argon gas through pipes.
[0022] The number of the argon gas coarse adjuster 11, the argon gas fine adjuster 12, and the argon arc welding torch 4 is two or more. In this embodiment, the number of the argon gas coarse adjuster 11, the argon gas fine adjuster 12, and the argon arc welding torch 4 is three. The flow of each argon arc welding torch 4 is independently adjusted.
[0023] The welding protective gas is a mixture of hydrogen and argon. The hydrogen has reducing property during the welding process and is suitable for the welding of stainless steel and some welding alloys. The welding torch includes a plasma welding torch 5. The protective gas flow coarse adjuster includes a mixed gas coarse adjuster 21. The protective gas flow fine adjuster includes a mixed gas fine adjuster 22. The mixed gas coarse adjuster 21, the mixed gas fine adjuster 22, and the plasma welding torch 5 are connected in series along the flow direction of the mixed gas through pipes.
[0024] The protective gas flow coarse adjuster is installed on a first box 8. The protective gas flow fine adjuster is installed on a second box 9.
[0025] When the nitrogen flow of the inner blowing pipe 6 needs to be adjusted, the approximate flow range is first adjusted through the inner blowing protective gas flow coarse adjuster 31, and then the fine adjustment of the flow is performed through the protective gas flow fine adjuster 32. Similarly, the protective gas flow of the argon arc welding torch 4 and the plasma welding torch 5 is adjusted through the protective gas flow coarse adjuster and the protective gas flow fine adjuster in sequence. This adjustment method only needs to operate the flow fine adjuster when the specifications of the replaced steel pipes 7 are not greatly different or the flow error needs to be corrected. Only when the specifications of the replaced steel pipes 7 are greatly different, the flow coarse adjuster and the flow fine adjuster need to be operated in sequence. The flow adjustment is more accurate and the operation is more convenient.
[0026] The utility model is described above in combination with the best embodiment, but the utility model is not limited to the above disclosed embodiment, and should cover various modifications, equivalent combinations according to the essence of the utility model.
Claims
1. A gas flow control device for a steel pipe forming and welding system, characterized by, The welding protective gas flow coarse regulator, the welding protective gas flow fine regulator and the welding torch are connected in series along the flow direction of the welding protective gas.
2. A gas flow control device for a pipe forming and welding system according to claim 1, characterized in that The welding protective gas comprises argon, the welding torch comprises an argon arc welding torch (4), the welding protective gas flow coarse regulator comprises an argon gas coarse regulator (11), the welding protective gas flow fine regulator comprises an argon gas fine regulator (12), and the argon gas coarse regulator (11), the argon gas fine regulator (12) and the argon arc welding torch (4) are connected in series along the flow direction of the argon by pipes.
3. A gas flow control device for a pipe forming and welding system according to claim 2, wherein The number of the argon gas coarse regulator (11), the argon gas fine regulator (12) and the argon arc welding torch (4) is two or more.
4. A gas flow control device for a pipe forming and welding system according to claim 1 or 2 or 3, characterized in that The welding protective gas is mixed gas of hydrogen and argon, the welding torch comprises a plasma welding torch (5), the welding protective gas flow coarse regulator comprises a mixed gas coarse regulator (21), the welding protective gas flow fine regulator comprises a mixed gas fine regulator (22), and the mixed gas coarse regulator (21), the mixed gas fine regulator (22) and the plasma welding torch (5) are connected in series along the flow direction of the mixed gas by pipes.
5. A gas flow control device for a pipe forming and welding system as defined in claim 1, wherein The welding protective gas flow coarse regulator is installed on a first box (8), and the welding protective gas flow fine regulator is installed on a second box (9).