Welding inflation plugging protection device

Abstract

The utility model provides a welding inflation plugging protection device, which relates to the technical field of steel pipe welding and comprises a middle shaft rod, a fixing disc is mounted at the upper end of the middle shaft rod, an air outlet hole is formed in the middle shaft rod and the fixing disc in a penetrating manner, an air belt connector is mounted at the lower end of the middle shaft rod, and the air belt connector is connected with the air outlet hole in a penetrating manner. And a sliding disc is movably mounted on the outer side of a rod body of the middle shaft rod in a penetrating manner. The isolating layer made of the high-elastic three-proofing cloth and the elastic rubber ring form a double-sealing structure, so that independent local sealing spaces are formed on the two sides of the welding position of the pipeline, the whole pipeline is not inflated, and compared with a traditional overall argon filling method which needs to fill the whole space of a large-diameter or long pipeline, the sealing structure is simple and convenient to operate. By means of the design, the using amount of inert gas can be greatly reduced, the gas purchasing cost is remarkably reduced, meanwhile, a large amount of inert gas is prevented from being directly discharged into the atmosphere, the green construction concept is met, and energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe welding technology, and more specifically, to a welding gas-filled sealing protection device. Background Technology

[0002] In steel pipe welding, in addition to proper protection of the high-temperature molten pool on the weld face, necessary measures must also be taken on the back side of the weld, especially for pipes with high welding quality requirements, to prevent oxidation of the weld by oxygen in the air. Without weld protection measures, the weld metal on the back side is easily oxidized during welding, alloying elements are burned off, and welding defects are prone to occur, resulting in a decrease in the mechanical properties and corrosion resistance of the weld metal. Inert gases are generally considered a good protective medium. In existing pipeline welding processes, the overall argon purging method is commonly used. This involves sealing both ends of the pipeline and filling it with inert argon gas for protection, thereby reducing the oxygen content inside the pipeline and thus reducing the degree of oxidation. However, while this method is simple for small-diameter pipelines or short pipe assemblies, it consumes a large amount of argon gas for large-diameter pipelines or long pipe assemblies, resulting in high production costs. The long purging time also leads to low production efficiency. Furthermore, due to the large internal space of the pipeline, even with a large amount of inert gas, air cannot be effectively vented, resulting in poor protection and seriously affecting the welding quality. Therefore, we propose a welding gas purging and sealing protection device to solve the above problems. Utility Model Content

[0003] The main objective of this invention is to provide a welding gas-filling and sealing protection device. This addresses the problem that while inert gases are generally considered a good protective medium, existing pipeline welding processes typically employ a method of overall argon purging. This involves sealing both ends of the pipeline and filling it with inert argon gas for protection, reducing the oxygen content inside the pipeline and thus decreasing oxidation. However, while this method is simple for small-diameter pipelines or short pipe assemblies, it becomes extremely expensive for large-diameter pipelines or long pipe assemblies, resulting in high production costs. Furthermore, the long purging time leads to low production efficiency. Additionally, due to the large internal space of the pipeline, even with a large amount of inert gas, air cannot be effectively vented, resulting in poor protection and severely impacting welding quality.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A welding gas-filled sealing protection device includes a central shaft, a fixed plate installed at the upper end of the central shaft, an air outlet hole penetrating through the interior of the central shaft and the fixed plate, an air hose interface installed at the lower end of the central shaft, and the air hose interface and the air outlet hole being connected through each other, a sliding plate being movably installed through the outer side of the central shaft, a plurality of second support rods being installed on the outer side of the fixed plate by means of hinge connection, and the second support rods being distributed in an umbrella shape with the center of the fixed plate as the apex, and a first support rod being installed on the outer side of the sliding plate by means of hinge connection, the first support rod and the second support rods being hinged to each other at their adjacent ends, and an isolation layer being installed on the outer side of the second support rod.

[0006] Preferably, a buckle is installed at the lower end of the shaft of the central axis rod, and the buckle is locked to the sliding disc. A traction rope fixing ring is installed on the outer side of the sliding disc, and a traction rope is wound around the traction rope fixing ring. The traction rope is used to bind the sliding disc to the central axis rod.

[0007] Preferably, an elastic rubber ring is installed on the outer side of the end of the first support rod and the second support rod that are close to each other, and the upper end of the elastic rubber ring is in contact with the isolation layer.

[0008] Preferably, sliding rings are movably installed at the upper and lower ends of the outer side of the central shaft located between the fixed disk and the sliding disk, and several supporting forearms are respectively hinged to the outer side of the sliding rings.

[0009] Preferably, the upper support arm is hinged to the second support rod, and the lower support arm is hinged to the first support rod.

[0010] Preferably, the feature is that: a spring is installed between the upper sliding ring and the fixed disk, and a spring is installed between the lower sliding ring and the sliding disk, and the springs are respectively sleeved and installed on the outside of the shaft of the central shaft.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] (1) In this utility model, the isolation layer made of high elastic three-proof cloth and the elastic rubber ring form a double sealing structure, thereby forming an independent local sealing space on both sides of the pipe welding position, instead of filling the entire pipe with gas. Compared with the traditional whole argon filling method, which requires filling the entire space of a large diameter or long pipe, this design can greatly reduce the amount of inert gas used, significantly reduce the gas procurement cost, and also avoid a large amount of inert gas being directly emitted into the atmosphere, which is in line with the concept of green construction and achieves energy conservation and emission reduction.

[0013] (2) This utility model utilizes the principle of opening and closing an umbrella. The device can be quickly opened in the pipe through the linkage of the sliding plate, support rod, spring and other structures, and can be tightly attached to the pipe wall through the elastic rubber ring. It can complete the gas filling and sealing in a short time, which greatly shortens the long gas filling time of the traditional whole argon filling method. The local sealed space formed by the isolation layer can effectively block the air, so that the oxygen content in the welding area drops to below the protection threshold quickly, avoiding oxidation on the back of the weld, burning of alloy elements and welding defects, and significantly improving the mechanical properties and corrosion resistance of the weld. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall closed-state structure of a welding gas-filled sealing protection device according to the present invention;

[0015] Figure 2 This is a schematic diagram of the overall open state structure of a welding gas-filled sealing protection device according to the present invention.

[0016] In the diagram: 1. Central shaft; 2. Locking buckle; 3. Air hose interface; 4. Sliding plate; 5. First support rod; 6. Elastic rubber ring; 7. Second support rod; 8. Fixed plate; 9. Support forearm; 10. Spring; 11. Sliding ring. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0018] like Figures 1 to 2 As shown in the figure, this utility model embodiment proposes a welding gas-filled sealing protection device, including a central shaft 1, a fixed plate 8 installed at the upper end of the central shaft 1, an air outlet hole penetrating through the interior of the central shaft 1 and the fixed plate 8, an air hose interface 3 installed at the lower end of the central shaft 1, and the air hose interface 3 is connected to the air outlet hole, a sliding plate 4 is movably installed through the outer side of the central shaft 1, a plurality of second support rods 7 are installed on the outer side of the fixed plate 8 by means of hinge connection, and the second support rods 7 are distributed in an umbrella shape with the center of the fixed plate 8 as the apex, and a first support rod 5 is installed on the outer side of the sliding plate 4 by means of hinge connection, the first support rod 5 and the second support rod 7 are hinged to each other at their close ends, and an isolation layer is installed on the outer side of the second support rod 7.

[0019] like Figure 1 and Figure 2As shown, in another embodiment of this utility model, a latch 2 is installed at the lower end of the shaft of the central shaft 1. The latch 2 is locked to the sliding disc 4. A traction rope fixing ring is installed on the outer side of the sliding disc 4, and a traction rope is wound around the traction rope fixing ring. The traction rope is used to bind the sliding disc 4 to the central shaft 1. An elastic rubber ring 6 is installed on the outer side of the end of the first support rod 5 and the second support rod 7 that are close to each other. The upper end of the elastic rubber ring 6 is in contact with the isolation layer and is located on the outer side of the shaft of the central shaft 1 between the fixing disc 8 and the sliding disc 4. The upper and lower ends of the side are movably connected with sliding rings 11. Several supporting arms 9 are installed on the outer side of the sliding rings 11 by means of hinges. The feature is that the supporting arms 9 at the upper end are hinged to the second supporting rod 7, the supporting arms 9 at the lower end are hinged to the first supporting rod 5, a spring 10 is installed between the sliding ring 11 at the upper end and the fixed plate 8, and a spring 10 is installed between the sliding ring 11 at the lower end and the sliding plate 4. The springs 10 are respectively sleeved on the outer side of the shaft of the central shaft 1.

[0020] The user first presses the latch 2 to release the lock between the sliding plate 4 and the central shaft 1. Then, the user can push the sliding plate 4 upward, causing it to move upward along the central shaft 1, pushing the spring 10 and the sliding ring 11. As the sliding plate 4 moves upward, it controls the first support rod 5 and the second support rod 7 to unfold, forming an umbrella shape. At the same time, the first support rod 5 and the second support rod 7 will cause the elastic rubber ring 6 to open, and the second support rod 7 will cause the isolation layer to unfold. After the sliding plate 4 moves to the designated position, the user can tie the sliding plate 4 and the central shaft 1 together with the traction rope. Then, the user can put the whole thing into both ends of the pipe. The umbrella formed by the isolation layer isolates and seals the two ends of the pipe weld. Then, the user connects to the delivery hose through the air hose interface 3, allowing inert gas to be injected between the two umbrella surfaces along the delivery hose, air hose interface 3 and air outlet to complete the inflation work.

[0021] The device can adapt to pipes of various diameters through the elastic deformation of springs and elastic rubber rings, making it easier to use;

[0022] The isolation layer is made of high-elastic three-proof cloth material and forms a physical seal with the elastic rubber ring 6, which significantly reduces the oxygen content in the welding area, prevents oxidation on the back of the weld and loss of alloy elements, and improves the welding quality;

[0023] By utilizing the principle of an umbrella opening, and through the linkage between various components and the cooperation of the elastic rubber ring 6, a local sealed space can be quickly formed, avoiding the time-consuming and gas-consuming problem of traditional overall argon filling, which requires filling the entire pipeline.

[0024] The working principle of this welding gas-filled sealing protection device:

[0025] In use, the user first presses the latch 2 to release the lock between the sliding disc 4 and the central shaft 1. Then, the user can push the sliding disc 4 upward, causing it to move upward along the central shaft 1, pushing the spring 10 and the sliding ring 11. As the sliding disc 4 moves upward, it controls the first support rod 5 and the second support rod 7 to unfold, forming an umbrella shape. At the same time, the first support rod 5 and the second support rod 7 will cause the elastic rubber ring 6 to open, and the second support rod 7 will cause the isolation layer to unfold. After the sliding disc 4 moves to the designated position, the user can tie the sliding disc 4 and the central shaft 1 tightly with the traction rope. Then, the user can place the entire assembly into both ends of the pipe. The umbrella formed by the isolation layer isolates and seals the two ends of the pipe weld. Then, the user connects to the delivery hose through the air hose interface 3, allowing inert gas to be injected between the two umbrella surfaces along the delivery hose, air hose interface 3, and air outlet to complete the inflation process.

[0026] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A welding gas-filled sealing protection device, comprising a central shaft (1), characterized in that: A fixed plate (8) is installed at the upper end of the central shaft (1). An air outlet is provided through the interior of the central shaft (1) and the fixed plate (8). An air belt interface (3) is installed at the lower end of the central shaft (1), and the air belt interface (3) is connected to the air outlet. A sliding plate (4) is movably installed through the outer side of the central shaft (1). Several second support rods (7) are installed on the outer side of the fixed plate (8) by means of hinge connection. The second support rods (7) are distributed in an umbrella shape with the center of the fixed plate (8) as the apex. Several first support rods (5) are installed on the outer side of the sliding plate (4) by means of hinge connection. The first support rods (5) and the second support rods (7) are hinged to each other at their close ends. An isolation layer is installed on the outer side of the second support rods (7).

2. The welding gas-filling sealing protection device according to claim 1, characterized in that: A buckle (2) is installed at the lower end of the shaft of the central shaft (1). The buckle (2) is locked to the sliding disc (4). A traction rope fixing ring is installed on the outside of the sliding disc (4), and a traction rope is wound on the traction rope fixing ring. The traction rope is used to bind the sliding disc (4) to the central shaft (1).

3. The welding gas-filling sealing protection device according to claim 1, characterized in that: An elastic rubber ring (6) is installed on the outer side of one end of the first support rod (5) and the second support rod (7) that are close to each other, and the upper end of the elastic rubber ring (6) is in contact with the isolation layer.

4. The welding gas-filling sealing protection device according to claim 1, characterized in that: The upper and lower ends of the central shaft (1) located between the fixed disk (8) and the sliding disk (4) are movably connected to a sliding ring (11), and a number of supporting arms (9) are respectively hinged to the outside of the sliding ring (11).

5. A welding gas-filled sealing protection device according to claim 4, characterized in that: The upper support arm (9) is hinged to the second support rod (7), and the lower support arm (9) is hinged to the first support rod (5).

6. The welding gas-filling sealing protection device according to claim 4, characterized in that: A spring (10) is installed between the upper sliding ring (11) and the fixed plate (8), and a spring (10) is installed between the lower sliding ring (11) and the sliding plate (4). The springs (10) are respectively sleeved and installed on the outside of the shaft of the central shaft (1).

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