Inflation plug assembly capable of adapting to welding seam protection on inner surface of bent pipeline

Abstract

The utility model discloses an inflation plug assembly capable of adapting to protection of a weld joint on the inner surface of a bent pipeline. The inflation plug assembly comprises a core rod, a hanging ring and a spherical plug. A core rod penetrates through the spherical plug along the center line; the two ends of the core rod are fixed with the spherical plug through a locking nut and a protective seat; the core rod is of a hollow rod structure, and hanging rings are arranged at the two ends of the hollow rod. The spherical plug is connected with the core rod to form an inflatable plug; the two inflation plugs connect the hanging rings at one ends of the hollow rods through connecting buckles to form an inflation plug assembly, and the exposed ends of the hollow rods on the two inflation plugs are provided with a quick-change connector and an exhaust valve respectively. The inflation plug assembly can smoothly move at the bent part of the pipeline and is also applicable to welding of a three-way pipe, so that inflation protection of inert gas is provided for the inner surface of the pipeline when the pipeline is used for welding a welding seam in the pipeline, the welding efficiency and the welding quality are improved, the consumption of the inert gas is reduced, and the production cost is reduced. And the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline welding, in particular to an inflatable plug assembly that can adapt to the protection of the inner surface weld of a bent pipeline. Background Technique

[0002] When pipeline connection adopts welding technology, due to factors such as material and welding process, it is required to protect the inner surface of the pipeline weld with inert gas during pipeline welding. The current operation method is to first connect a pipeline by fixed welding, and then place an inner inflatable tool for pipeline protection and a towing rope in a suitable position beside the weld in advance. After each weld is completed, the towing rope is manually dragged to move the inflatable tool to a suitable position. However, the current inflatable tools for pipeline welding can generally only be used in straight pipelines and are completely inapplicable for bent pipelines, especially when welding the bent part of the pipeline. At the same time, the current inflatable tools cannot be used during the welding of tee pipelines. Summary of the Invention

[0003] In view of the above problems, the utility model provides an inflatable plug assembly that can adapt to the protection of the inner surface weld of a bent pipeline to solve the technical problems in the background technique.

[0004] The utility model is implemented by adopting the following technical solutions:

[0005] An inflatable plug assembly that can adapt to the protection of the inner surface weld of a bent pipeline includes a mandrel, a hanging ring and a spherical plug; the spherical plug is provided with a mandrel penetrating along the center line; both ends of the mandrel are fixed to the spherical plug through the provided lock nuts and protective seats; the mandrel adopts a hollow rod structure, and hanging rings are provided at both ends of the hollow rod; the spherical plug and the mandrel are connected into an inflatable plug; two inflatable plugs are connected into an inflatable plug assembly by connecting the hanging rings on one end of the hollow rod through a connecting buckle. A quick-change joint for inflation is provided at the exposed end of the hollow rod of one inflatable plug, and an exhaust valve is provided at the exposed end of the hollow rod of the other inflatable plug.

[0006] Further, the connecting buckle adopts a quick-release buckle, and two inflatable plugs are detachably connected into a whole through a plurality of quick-release buckles.

[0007] Further, hanging holes are provided on the outer surfaces of both ends of the hollow rod; the hanging rings are connected to the hanging holes.

[0008] Further, a threaded connection part is provided on the hollow rod; after the hollow rod penetrates through the spherical plug, it is locked by threadedly connecting the lock nut with the threaded connection part on the hollow rod; a washer is sleeved on the threaded connection part.

[0009] Further, the protective seat is provided with an arc surface, and the arc surface of the protective seat is fitted and connected to the surface of the spherical plug.

[0010] Further, the quick-change joint includes a joint body for connecting with the hollow rod, and a sealing elastic seat is installed in the inner hole of the joint body.

[0011] Further, the spherical plug is made of silica gel material.

[0012] The beneficial effects of the present utility model are as follows: The structure of the present utility model is simple and easy to operate. The inflatable plug assembly can move smoothly in the bent part of the pipeline, and is also applicable to the welding of the tee pipe, thereby providing an inert gas inflation protection for the inner surface of the pipeline during the welding of the pipeline weld, improving the welding efficiency and welding quality, and reducing the consumption of inert gas and the cost. Description of the Drawings

[0013] Figure 1 is the overall structural schematic diagram of the present utility model;

[0014] Figure 2 is the connection structural schematic diagram of the inflation end of the mandrel of the present utility model;

[0015] Figure 3 is the connection structural schematic diagram of the exhaust end of the mandrel of the present utility model.

[0016] In the figure: exhaust valve 1; hanging ring 2; locking nut 3; washer 4; spherical plug 5; protective seat 6; connecting buckle 7; quick-change joint 8; mandrel 9; joint body 81; sealing elastic seat 82; hollow rod 901; threaded connection part 902; hanging hole 903. Specific Embodiments

[0017] The following is a further detailed description with reference to the best embodiments shown in the drawings.

[0018] Refer to Figures 1 to 3As shown in the figure, an inflatable plug assembly adaptable to the protection of welds on the inner surface of curved pipes includes a mandrel 9, a hanging ring 2, and a spherical plug 5. The spherical plug 5 is provided with a mandrel 9 penetrating along the center line. Both ends of the mandrel 9 are fixed to the spherical plug 5 through locking nuts 3 and protective seats 6 provided. The mandrel 9 adopts a hollow rod 901 structure, and hanging rings 2 are provided at both ends of the hollow rod 901. The spherical plug 5 and the mandrel 9 are connected to form an inflatable plug. Two inflatable plugs are connected into an inflatable plug assembly by connecting buckles 7 connecting the hanging rings 2 on one end of the hollow rod 901. One end of the exposed hollow rod 901 on an inflatable plug is provided with a quick-change joint 8 for inflation, and the other end of the exposed hollow rod 901 on the other inflatable plug is provided with an exhaust valve 1. Different quick-change joints 8 and exhaust valves 1 with different parameters can be replaced according to different pipe specifications to meet the process requirements of inflation and deflation during corresponding welding protection. This inflatable plug assembly can move smoothly in the curved part of the pipe and is also applicable to the welding of tee pipes, thereby providing an inert gas inflation protection for the inner surface of the pipe during the welding of pipe welds, improving the welding efficiency and welding quality, reducing the consumption of inert gas, and reducing the cost.

[0019] As a preferred embodiment, as Figure 2 shown, the connecting buckle 7 adopts a quick-release buckle, and two inflatable plugs are detachably connected into a whole through a plurality of quick-release buckles. Hanging holes 903 are provided on the outer surfaces of both ends of the hollow rod 901; the hanging ring 2 is connected to the hanging hole 903. Thus, the inflatable plug assembly can meet the requirements of the space size between the two spherical plugs 5 of the inflatable plug assembly for different construction processes by setting the number of quick-release buckles.

[0020] As a preferred embodiment, as Figure 2 and Figure 3 shown, a threaded connection part 902 is provided on the hollow rod 901; after the hollow rod 901 penetrates through the spherical plug 5, it is threadedly connected and locked through the locking nut 3 and the threaded connection part 902 on the hollow rod 901, which is convenient for operation and can be reused repeatedly; a washer 4 is sleeved on the threaded connection part 902.

[0021] As a preferred embodiment, as Figure 2 and Figure 3 shown, the protective seat 6 is provided with an arc surface, and the arc surface of the protective seat 6 is in fitting connection with the surface of the spherical plug 5 to avoid scratching of the spherical plug 5 by sharp corners and improve the service life.

[0022] As a preferred embodiment, as Figure 2 shown, the quick-change joint 8 includes a joint body 81 for connecting with the hollow rod 901, which is convenient for quick replacement and locking connection. A sealing elastic seat 82 is installed in the inner hole of the joint body 81 to improve the sealing performance.

[0023] As a preferred embodiment, the spherical plug 5 is made of silicone material, which can fit well with the inner wall of the pipeline to prevent damage to the pipeline due to collision.

[0024] Example:

[0025] When the pipeline is butt-welded, the device of the utility model is connected to a traction rope, and then pulled by external force to move in the pipeline. It can be conveniently used in the pipeline with elbows and tees for welding pipeline welds. Then, through the inflation tube on the inert gas tank connected to the quick-change joint 8, the two inflation plugs of the inflation plug assembly are inflated through the hollow rod 901, so that the inner surface of the weld in the pipeline welding area is inflated for protection. During inflation, only the space between the two spherical plugs 5 is inflated to form a closed inert gas protection space instead of inflating the entire pipeline, thereby saving a large amount of expensive inert and high-priced gas. Through the connection method of the connecting buckle 7 and the hanging ring 2 provided between the two inflation plugs, a flexible connection system is formed, so that the inflation plug assembly can be easily moved in the elbow and the tee, avoiding the obstruction of the rigidly connected inflation plug assembly in the bending place, and significantly reducing the installation, construction and welding costs, especially the welding cost of long-distance continuous pipelines. This inflatable plug assembly can cooperate with the traction device and the control device to realize automatic traction and accurate positioning, ensure the quality of operation, greatly reduce labor intensity, improve welding efficiency, and ensure welding quality.

[0026] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. An inflatable plug assembly adaptable to the protection of welds on the inner surface of a bent pipeline, characterized in that, It includes a mandrel, a hanging ring and a spherical plug; the spherical plug is provided with a mandrel penetrating along the center line; both ends of the mandrel are fixed to the spherical plug through the provided locking nuts and protective seats; the mandrel adopts a hollow rod structure, and hanging rings are arranged at both ends of the hollow rod; the spherical plug and the mandrel are connected to form an inflation plug; two inflation plugs are connected into an inflation plug assembly by connecting the hanging rings on one end of the hollow rod through a connecting buckle, a quick-change joint for inflation is arranged at the exposed end of the hollow rod on one inflation plug, and an exhaust valve is arranged at the exposed end of the hollow rod on the other inflation plug.

2. The inflatable plug assembly for protecting the weld seam on the inner surface of a bendable pipe according to claim 1, characterized in that, The connecting buckle adopts a quick-release buckle, and two inflation plugs are detachably connected into a whole through a plurality of quick-release buckles.

3. The inflatable plug assembly for protecting the weld seam on the inner surface of a bendable pipe according to claim 1, wherein, Hanging holes are arranged on the outer surfaces of both ends of the hollow rod; the hanging ring is connected to the hanging hole.

4. The inflatable plug assembly for protecting the weld on the inner surface of a bendable pipe according to claim 1, characterized in that, A threaded connection part is arranged on the hollow rod; after the hollow rod penetrates through the spherical plug, it is threadedly connected and locked with the threaded connection part on the hollow rod through a locking nut; a washer is sleeved on the threaded connection part.

5. The inflatable plug assembly for protecting the weld on the inner surface of a bendable pipe according to claim 1, characterized in that, The protective seat is provided with an arc surface, and the arc surface of the protective seat is connected in a fitting manner with the surface of the spherical plug.

6. The inflatable plug assembly for protecting the weld seam on the inner surface of a bendable pipe according to claim 1, characterized in that, The quick-change joint includes a joint body for connecting with the hollow rod, and a sealing elastic seat is installed in the inner hole of the joint body.

7. The inflatable plug assembly for protecting the weld on the inner surface of a bendable pipe according to claim 1, wherein, The spherical plug is made of silica gel material.

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