Argon filling device for pipeline assembly

Abstract

The invention discloses a pipeline assembly argon filling device which comprises a first pipeline to be assembled and welded and an upstream pipeline, the upstream pipeline is connected with a first pipeline flange, the first pipeline to be assembled and welded is connected with a first assembly flange, and an argon filling assembly is arranged between the first assembly flange and the first pipeline flange. Argon is filled into the first to-be-assembled pipe line; the end, away from the first assembly flange, of the first to-be-assembled pipe line is in butt joint with the second to-be-assembled pipe line, the end, away from the first to-be-assembled pipe line, of the second to-be-assembled pipe line is connected with the downstream pipeline, and an oxygen measuring probe is arranged between the second to-be-assembled pipe line and the downstream pipeline. And argon flows into the second to-be-assembled pipe line along the first to-be-assembled pipe line, so that the butt joint ports of the first to-be-assembled pipe line and the second to-be-assembled pipe line are subjected to protective welding. According to the argon filling device for pipeline assembly, the problem that argon filling or argon filling shielded welding cannot be carried out on a pipeline shifting flash opening is solved, and the argon filling device is convenient to install and operate, safe and reliable.

Description

Technical Field

[0001] The invention belongs to the field of offshore petroleum engineering, and in particular relates to an argon filling device for a pipeline pair. Background Art

[0002] The modules of offshore engineering projects require pipelines during the construction phase. The pipelines are divided into different systems, involving different materials and wall thicknesses. Pipelines made of special materials such as stainless steel require argon arc welding. According to process requirements, argon gas protection must be continuously filled during the welding process to isolate the air and prevent oxidation in the welding area.

[0003] At present, in the construction of conventional module projects, pipelines are installed and welded in sections on the modules. Due to the design requirements of the drawings and the arrival order of different components such as valves, flanges, and single pipes involved in the pipeline system, the pipeline often involves the last weld for final improvement during the final installation. This weld cannot be welded during the prefabrication stage and can only be reserved for the final welding of the module assembly. When welding this weld, the positioning of the pipe sections and pipe fittings at the left and right ends were finished, and the welding argon filling of the last weld became a difficult problem that needed to be solved on site.

[0004] On-site welding is often done by looking for flange connections that can be opened on both sides of the pipeline welds that need to be welded. After opening, the pipe mouth is moved out, one port is filled with argon, and the other port is used to measure the oxygen content with an oxygen meter. After the concentration required by the welding process parameters is reached, the pipe mouth is welded. This process requires the already installed pipeline to be moved, and it is not convenient to fix the rigidity and control deformation during welding, resulting in additional construction costs, cumbersome operations, and low efficiency.

[0005] Therefore, it is urgent to design an argon filling device for pipeline assembly to solve the problem of argon filling protection during pipeline welding mentioned above. Summary of the invention

[0006] In order to solve the technical problems mentioned in the background technology that the installed pipelines are displaced and it is inconvenient to control deformation by rigid fixation during welding, resulting in additional construction costs, cumbersome operation and low efficiency, an argon filling device for pipeline assemblies is provided to solve the problem of argon gas protection during pipeline welding.

[0007] To achieve the above purpose, the specific technical scheme of the argon filling device of the pipeline group of the present invention is as follows: A pipeline pair argon filling device comprises a first pipeline to be welded and an upstream pipeline, the upstream pipeline is connected to a first pipeline flange, the first pipeline to be welded is connected to a first pair of flanges, an argon filling assembly is arranged between the first pair of flanges and the first pipeline flange, so as to fill argon into the first pipeline to be welded; the first pipeline to be welded is butt-jointed with a second pipeline to be welded at one end away from the first pair of flanges, the second pipeline to be welded is connected to a downstream pipeline at one end away from the first pipeline to be welded, and an oxygen measuring probe is arranged between the second pipeline to be welded and the downstream pipeline; argon flows into the second pipeline to be welded along the first pipeline to be welded, so as to perform protective welding on the butt joint ports of the first pipeline to be welded and the second pipeline to be welded.

[0008] Furthermore, the argon filling assembly includes a gasket, which is arranged between the first pipeline flange and the first set of flanges.

[0009] Furthermore, a fastening bolt hole is opened on the gasket, and the fastening bolt passes through the first pipeline flange, the gasket and the first set of flanges in sequence to fix the gasket between the first pipeline flange and the first set of flanges.

[0010] Furthermore, a guide pipe is provided on the pad, and argon gas enters the first pipeline to be welded along the guide pipe.

[0011] Furthermore, an argon-filled belt is connected to one end of the guide tube away from the pad, so that argon gas enters the guide tube along the argon-filled belt.

[0012] Furthermore, a shut-off valve is provided on the guide tube, and the shut-off valve is opened or closed to control the argon gas to flow into the guide tube.

[0013] Furthermore, a hollow groove is provided on the pad, and an open end of the hollow groove is communicated with the first pipeline to be welded.

[0014] Furthermore, the hollow groove and the guide tube are radially staggered and arranged on the pad, so that the argon gas enters the first pipeline to be welded along the open end of the hollow groove.

[0015] Furthermore, the second pipeline to be welded is connected to one end away from the first pipeline to be welded with a second set of flanges, the downstream pipeline is connected to the second pipeline flange, and the second set of flanges is connected to the second pipeline flange by fastening bolts.

[0016] Furthermore, an oxygen measuring probe is arranged between the second set of flanges and the second pipeline flange.

[0017] The argon filling device of the pipeline assembly of the present invention has the following advantages: By arranging an argon filling assembly between the first pipeline to be welded and the upstream pipeline, and an oxygen measuring probe between the second pipeline to be welded and the downstream pipeline, argon gas flows along the first pipeline to be welded into the second pipeline to be welded, and then protective welding is performed on the joint interface of the first pipeline to be welded and the second pipeline to be welded, thereby solving the problem of flash filling with argon due to pipeline displacement or inability to fill with argon for protective welding. The installation operation is convenient, the technical operation requirements for the workers are not high, the efficiency of argon filling welding at the on-site pipeline assembly port is improved, and it is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the argon filling device of the pipeline assembly of the present invention; Figure 2 It is a front view of an argon filling assembly of an argon filling device of a pipeline assembly of the present invention; Figure 3 A side view of an argon filling assembly of an argon filling device of a pipeline assembly of the present invention.

[0019] Description of the markings in the figure: 1. The first pipeline to be welded; 2. The second pipeline to be welded; 3. The upstream pipeline; 4. The downstream pipeline; 5. The first pipeline flange; 6. The second pipeline flange; 7. The argon filling assembly; 71. The gasket; 72. The fastening bolt hole; 73. The guide tube; 74. The argon filling belt; 75. The shut-off valve; 76. The hollow groove; 8. The first set of flanges; 9. The second set of flanges; 10. The oxygen measuring probe; 11. The port to be welded; 12. The welding machine; 13. The fastening bolts. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0021] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0022] Please refer to the attached Figure 1 To Attachment Figure 3 The argon filling device of the pipeline group of the present invention is described.

[0023] like Figure 1As shown, the argon filling device of the pipeline pair in the present invention comprises a first pipeline to be welded 1 and an upstream pipeline 3, the upstream pipeline 3 is connected to a first pipeline flange 5, the first pipeline to be welded 1 is connected to a first pair of flanges 8, an argon filling assembly 7 is provided between the first pair of flanges 8 and the first pipeline flange 5, so as to fill argon into the first pipeline to be welded 1; the end of the first pipeline to be welded 1 away from the first pair of flanges 8 is butt-jointed with the second pipeline to be welded 2, the end of the second pipeline to be welded 2 away from the first pipeline to be welded 1 is connected to the downstream pipeline 4, and an oxygen measuring probe 10 is provided between the second pipeline to be welded 2 and the downstream pipeline 4; argon flows along the first pipeline to be welded 1 into the second pipeline to be welded 2, so as to perform protective welding on the butt joint ports of the first pipeline to be welded 1 and the second pipeline to be welded 2.

[0024] By arranging an argon filling component 7 between the first pipeline to be welded 1 and the upstream pipeline 3, and arranging an oxygen measuring probe 10 between the second pipeline to be welded 2 and the downstream pipeline 4, argon gas flows along the first pipeline to be welded 1 into the second pipeline to be welded 2, and then protective welding is performed on the joint interface of the first pipeline to be welded 1 and the second pipeline to be welded 2, thereby solving the problem of flash filling with argon due to pipeline displacement or inability to fill with argon for protective welding, facilitating installation and operation, and not requiring high technical operation skills of workers, thereby improving the efficiency of argon filling welding at the on-site pipeline assembly port, and being safe and reliable.

[0025] Further, if Figure 1 and Figure 2 As shown, the argon filling assembly 7 includes a gasket 71, which is arranged between the first pipeline flange 5 and the first set of flanges 8; a fastening bolt hole 72 is opened on the gasket 71, and the fastening bolts 13 pass through the first pipeline flange 5, the gasket 71 and the first set of flanges 8 in sequence to fix the gasket 71 between the first pipeline flange 5 and the first set of flanges 8.

[0026] In this embodiment, preferably, the main structure of the argon filling assembly 7 includes a gasket 71, which is generally circular and clamped between the first pipeline flange 5 and the first set of flanges 8; a plurality of fastening bolt holes 72 matching the shapes of the first pipeline flange 5 and the first set of flanges 8 are opened circumferentially of the gasket 71, and one end of the fastening bolt 13 passes through the first pipeline flange 5, the gasket 71 and the first set of flanges 8 in sequence to ensure that the gasket 71 is fixed between the first pipeline flange 5 and the first set of flanges 8.

[0027] Further, if Figure 1 and Figure 3 As shown, a guide tube 73 is provided on the pad 71, and argon gas enters the first pipeline 1 to be welded along the guide tube 73; an argon filling belt 74 is connected to the end of the guide tube 73 away from the pad 71, so that argon gas enters the guide tube 73 along the argon filling belt 74; a shut-off valve 75 is provided on the guide tube 73, and the shut-off valve 75 is opened or closed to control the flow of argon gas into the guide tube 73.

[0028] The pad 71 is provided with a hollow groove 76, and the open end of the hollow groove 76 is connected to the first pipeline 1 to be assembled and welded; the hollow groove 76 and the guide tube 73 are radially offset and arranged on the pad 71, so that argon gas enters the first pipeline 1 to be assembled and welded along the open end of the hollow groove 76.

[0029] In the present embodiment, preferably, a guide tube 73 is radially connected along the pad 71, and an argon gas filling belt 74 is connected to the end of the guide tube 73 away from the pad 71, and the argon gas enters the guide tube 73 along the argon gas filling belt 74, and then enters the first pipeline to be welded 1; a shut-off valve 75 is provided at the end of the guide tube 73 away from the pad 71, and by opening or closing the shut-off valve 75, whether the argon gas in the argon gas filling belt 74 enters the guide tube 73 is controlled, and then the amount of argon gas entering the first pipeline to be welded 1 and the second pipeline to be welded 2 is controlled.

[0030] A hollow groove 76 is provided in the center of the pad 71. Preferably, a protruding end of the hollow groove 76 is connected to the upstream pipeline 3, and a concave surface of the hollow groove 76 is connected to the first pipeline to be welded 1, and a port of the guide tube 73 is located close to the first pipeline to be welded 1, so that argon gas enters the first pipeline to be welded 1 and seals the upstream pipeline 3.

[0031] Further, if Figure 1 As shown, the second pipeline 2 to be welded is connected to a second set of flanges 9 at one end away from the first pipeline 1 to be welded, the downstream pipeline 4 is connected to a second pipeline flange 6, and the second set of flanges 9 is connected to the second pipeline flange 6 by fastening bolts 13; an oxygen measuring probe 10 is arranged between the second set of flanges 9 and the second pipeline flange 6.

[0032] In this embodiment, a second set of flanges 9 are connected to one end of the second pipeline 2 to be welded away from the first pipeline 1 to be welded, and the second set of flanges 9 are connected to the second pipeline flange 6 of the downstream pipeline 4 by fastening bolts 13. The oxygen measuring probe 10 is clamped between the second set of flanges 9 and the second pipeline flange 6. The oxygen content inside the first pipeline 1 to be welded and the second pipeline 2 to be welded is judged by the oxygen measuring probe 10, and then it is determined whether the argon content in the first pipeline 1 to be welded and the second pipeline 2 to be welded meets the predetermined value. The welding machine 12 performs protective welding on the butt joint ports of the first pipeline 1 to be welded and the second pipeline 2 to be welded.

[0033] As a preferred embodiment, the argon filling assembly 7 can be clamped between the second set of flanges and the second pipeline flange 6 , and the oxygen measuring probe 10 can be clamped between the first set of flanges 8 and the first pipeline flange 5 .

[0034] The construction steps of the argon filling device of the pipeline group in this application are as follows: First, place the first pipeline to be welded 1 connected to the upstream pipeline 3 and the second pipeline to be welded 2 connected to the downstream pipeline 4 in a straight line, and butt the welding ports 11 of the first pipeline to be welded 1 and the second pipeline to be welded 2; Then, a gasket 71 is connected between the first pipeline flange 5 and the first set of flanges 8, and the shut-off valve 75 is opened. The argon gas in the argon gas belt 74 flows along the guide pipe 73 and enters the first pipeline to be welded 1 through the concave surface of the hollow groove 76. The argon gas flows along the first pipeline to be welded 1 into the second pipeline to be welded 2. This process continues until the welding is completed. Then, an oxygen measuring probe 10 is connected between the second pipeline flange 6 and the second set of flanges 9 to measure oxygen, and this process continues until the welding is completed; Finally, when the oxygen concentration inside the first pipeline to be welded 1 and the second pipeline to be welded 2 reaches the welding process parameter, the welding of the ports to be welded is started.

[0035] The argon filling device based on pipeline assembly adopts the argon filling component 7 to fill argon into the first pipeline to be welded 1 and the second pipeline to be welded 2, which has a positive effect on the overall positioning of the pipeline and the rigid fixation to prevent welding deformation, facilitates installation operation, improves construction efficiency and operation safety, and facilitates efficient promotion and application.

[0036] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An argon filling device for a pipeline pair, characterized in that: It comprises a first pipeline to be welded and an upstream pipeline, the upstream pipeline is connected with a first pipeline flange, the first pipeline to be welded is connected with a first set of counter flanges, an argon filling assembly is provided between the first set of counter flanges and the first pipeline flange, so as to fill argon into the first pipeline to be welded; The first pipeline to be welded is connected to the second pipeline to be welded at one end away from the first flange, the second pipeline to be welded is connected to the downstream pipeline at one end away from the first pipeline to be welded, and an oxygen measuring probe is provided between the second pipeline to be welded and the downstream pipeline; Argon gas flows along the first pipeline to be welded into the second pipeline to be welded, so as to perform protection welding on the butt joint ends of the first pipeline to be welded and the second pipeline to be welded.

2. The argon filling device for pipeline assembly according to claim 1, characterized in that: The argon filling assembly includes a gasket, which is arranged between the first pipeline flange and the first set of flanges.

3. The argon filling device for pipeline assembly according to claim 2, characterized in that: The gasket is provided with fastening bolt holes, and the fastening bolts pass through the first pipeline flange, the gasket and the first set of counter flanges in sequence, so that the gasket is fixed between the first pipeline flange and the first set of counter flanges.

4. The argon filling device for pipeline assembly according to claim 2, characterized in that: A guide pipe is provided on the pad, and argon gas enters the first pipeline to be welded along the guide pipe.

5. The argon filling device for pipeline assembly according to claim 4, characterized in that: An argon-filled belt is connected to one end of the guide tube away from the pad, so that argon gas enters the guide tube along the argon-filled belt.

6. The argon filling device for pipeline assembly according to claim 5, characterized in that: A shut-off valve is provided on the guide tube, and the shut-off valve is opened or closed to control the flow of argon gas into the guide tube.

7. The argon filling device for pipeline assembly according to claim 2, characterized in that: A hollow groove is provided on the pad, and an open end of the hollow groove is communicated with the first pipeline to be welded.

8. The argon filling device for pipeline assembly according to claim 7, characterized in that: The hollow groove and the guide pipe are arranged on the pad in a radially offset manner, so that argon gas enters the first pipeline to be welded along the open end of the hollow groove.

9. The argon filling device for pipeline assembly according to claim 1, characterized in that: The second pipeline to be welded is connected to a second set of flanges at one end away from the first pipeline to be welded, the downstream pipeline is connected to the second pipeline flange, and the second set of flanges is connected to the second pipeline flange by fastening bolts.

10. The argon filling device for pipeline assembly according to claim 9, characterized in that: An oxygen measuring probe is arranged between the second set of flanges and the second pipeline flange.

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