An inert gas device for protecting longitudinal weld formation

Abstract

The utility model relates to a welding protection device technical field, specifically disclose a kind of inert gas device for protecting longitudinal weld forming, comprising: accommodating groove, one end of accommodating groove is fixedly installed with air inlet pipe, the inner end of accommodating groove is fixedly installed with corrosion-resistant air pipe, and the one end of air inlet pipe is fixedly connected with the one end of corrosion-resistant air pipe by passing through the lateral wall of accommodating groove;The inner end of accommodating groove is installed with hole copper plate, and hole copper plate is located at the upper end of corrosion-resistant air pipe, the utility model is according to the length of need welding stainless steel cylinder, rotating the accommodating groove of appropriate length, and accommodating groove is placed in the inner end of copper cylinder, and is fixed by U type card, guarantee the upper end port of accommodating groove is located below weld, welding can be carried out, can realize the uniform, stable output of inert gas, all-round, accurate protection is carried out to weld area, effectively improve the quality and forming effect of weld, simultaneously have simple structure, convenient operation, cost is relatively lower.

Description

Technical Field

[0001] This utility model relates to the technical field of welding protection devices, specifically an inert gas device for protecting the formation of longitudinal weld seams. Background Technology

[0002] During the welding of longitudinal seams in stainless steel cylinders using plasma welding machines, the weld area is highly susceptible to the effects of gases such as oxygen in the air, leading to defects such as porosity, oxidation, and cracks, severely impacting weld quality and formation. Furthermore, the lack of gas protection on the back side can accelerate weld cooling, resulting in grain coarsening. This reduces weld toughness and plasticity, lowers tensile strength, and ultimately affects weld service life.

[0003] Currently, commonly used inert gas protection methods have some shortcomings, such as uneven distribution of the protective gas, inability to fully and effectively cover the weld area, and difficulty in achieving precise gas protection; some protection devices are also complex in structure, inconvenient to operate, and costly. Therefore, developing an inert gas protection device that can effectively protect weld formation, improve welding quality, and has wide applicability and convenience is of great practical significance. Utility Model Content

[0004] The purpose of this invention is to provide an inert gas device for protecting the formation of longitudinal weld seams, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an inert gas device for protecting the formation of longitudinal weld seams, comprising: a receiving tank, an inlet pipe fixedly installed at one end of the receiving tank, a corrosion-resistant gas diffuser fixedly installed at the inner end of the receiving tank, and one end of the inlet pipe passing through the side wall of the receiving tank and fixedly connected to one end of the corrosion-resistant gas diffuser. A perforated copper plate is installed at the inner end of the receiving tank. The perforated copper plate is located at the upper end of the corrosion-resistant gas diffuser. Outward flanges are fixedly installed on both the left and right sides of the upper end of the receiving tank. A high-temperature resistant rubber pad is fixedly installed at the upper end of the outward flanges. A U-shaped clip is connected to the lower end of the receiving tank.

[0006] Preferably, the erosion gas pipe is U-shaped, with one end fixedly connected to the air inlet pipe and the other end fixedly connected to the inner wall of the receiving groove, and a plurality of air dispersing holes are evenly opened on the erosion gas pipe.

[0007] Preferably, baffles are fixedly installed on the inner walls of both the left and right ends of the receiving groove, and a perforated copper plate is placed above the baffles.

[0008] Preferably, the inner side of the high-temperature resistant rubber pad is higher than the outer side.

[0009] Preferably, there are two U-shaped cards, which are respectively fitted onto the lower sides of the front and rear ends of the receiving groove. A snap-fit ​​groove is opened on one side of the upper end of the U-shaped card, and the snap-fit ​​groove snaps onto the cylinder.

[0010] Preferably, a threaded sleeve is fixedly installed at the bottom end of the U-shaped card. The threaded sleeve penetrates the lower side wall of the U-shaped card. A hand-tightening bolt is threaded inside the threaded sleeve. One end of the hand-tightening bolt passes through the threaded sleeve and is rotatably connected to the top plate through a bearing.

[0011] Preferably, the top plate and the lower outer wall of the receiving groove abut each other.

[0012] Preferably, a quick connector is fixedly installed at the end of the air inlet pipe away from the corrosion-resistant diffuser pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This invention allows for the selection of a suitable length of receiving groove based on the required length of the stainless steel cylinder to be welded. The receiving groove is then placed inside the copper cylinder and secured with a U-shaped clip, ensuring that the upper end of the receiving groove is below the weld seam. Welding can then proceed. This design enables uniform and stable output of inert gas, providing comprehensive and precise protection for the weld seam area, effectively improving the quality and forming effect of the weld seam. Furthermore, it features a simple structure, convenient operation, and low cost. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the connection structure between the present invention and the cylinder. Figure 2 This is a three-dimensional structural schematic diagram of the present utility model; Figure 3 This is a schematic diagram of the unfolded structure of the U-shaped card of this utility model; Figure 4 This is a schematic diagram of the inner end structure of the receiving groove of this utility model; Figure 5 This is a schematic diagram of the U-shaped card structure of this utility model.

[0015] In the diagram: 1. Receiving groove; 2. Folded edge; 3. High-temperature resistant rubber pad; 4. Baffle strip; 5. Perforated copper plate; 6. Air inlet pipe; 7. Corrosion-resistant air diffuser pipe; 8. Quick connector; 9. U-shaped clip; 10. Clip groove; 11. Threaded sleeve; 12. Hand-tightened bolt; 13. Top plate; 14. Cylinder body. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] Please see Figures 1-5 This utility model provides a technical solution: an inert gas device for protecting the formation of longitudinal welds, comprising: a receiving tank 1, which is made of stainless steel and has high strength, fits the workpiece to be welded, contains inert gas, and the gas flows back in the tank cavity. The length varies from 0.2 meters to 2.5 meters, and can protect longitudinal seams of different lengths. The receiving tank 1 is fixed inside the cylinder 14 by a U-shaped clip 9, and the upper port of the receiving tank 1 is located below the gap to be welded on the cylinder 14. When welding the gap on the cylinder 14, the inert gas in the receiving tank 1 plays a role in cooling and protecting the weld.

[0018] An air inlet pipe 6 is fixedly installed at one end of the receiving tank 1, and a corrosion-resistant gas diffuser pipe 7 is fixedly installed at the inner end of the receiving tank 1. One end of the air inlet pipe 6 passes through the side wall of the receiving tank 1 and is fixedly connected to one end of the corrosion-resistant gas diffuser pipe 7. The corrosion-resistant gas diffuser pipe 7 is U-shaped. One end of the corrosion-resistant gas diffuser pipe 7 is fixedly connected to the air inlet pipe 6, and the other end is fixedly connected to the inner wall of the receiving tank 1. Several diffuser holes are evenly opened on the corrosion-resistant gas diffuser pipe 7. A quick connector 8 is fixedly installed at the end of the air inlet pipe 6 away from the corrosion-resistant gas diffuser pipe 7. The quick connector 8 facilitates connection with an external pipeline for transporting inert gas, thereby evenly distributing the inert gas in the receiving tank 1.

[0019] A perforated copper plate 5 is installed at the inner end of the receiving tank 1. The perforated copper plate 5 is located at the upper end of the corrosion-resistant gas dissipation pipe 7. Baffles 4 are fixedly installed on the inner walls of both the left and right ends of the receiving tank 1. The perforated copper plate 5 is placed above the baffles 4. The perforated copper plate 5 can effectively absorb the heat generated during welding and transfer the heat to the outside. The evenly distributed small holes ensure the inert gas flow in the upper cavity of the receiving tank 1, which cools and protects the weld. Moreover, the perforated copper plate 5 itself has a certain degree of corrosion resistance, and the multi-pore structure can further improve its corrosion resistance, enabling it to work stably for a long time.

[0020] Outward flanges 2 are fixedly installed on both the left and right sides of the upper end of the receiving tank 1. A high-temperature resistant rubber pad 3 is fixedly installed on the upper end of the outward flange 2. The inner side of the high-temperature resistant rubber pad 3 is higher than the outer side. The high-temperature resistant rubber pad 3 is made of rubber, which has good elasticity and flexibility and can effectively absorb vibration and impact. When the receiving tank 1 is lifted upward by the top plate 13, the high-temperature resistant rubber pad 3 contacts the inner wall of the cylinder 14. The design of the high-temperature resistant rubber pad 3 with a higher inner side and a lower outer side makes it easier to fit better with the inner wall of the cylinder 14. This can make the gas protection device fit better with the weld, resulting in strong sealing performance, effectively reducing the loss of inert gas, and it is not easy to melt at high temperatures.

[0021] The lower end of the receiving groove 1 is connected to a U-shaped clamp 9. There are two U-shaped clamps 9, which are respectively fitted onto the lower sides of the front and rear ends of the receiving groove 1. A snap-fit ​​groove 10 is opened on one side of the upper end of the U-shaped clamp 9. The snap-fit ​​groove 10 snaps onto the cylinder 14. A threaded sleeve 11 is fixedly installed at the bottom end of the U-shaped clamp 9. The threaded sleeve 11 passes through the lower side wall of the U-shaped clamp 9. A hand-tightening bolt 12 is connected to the internal thread of the threaded sleeve 11. One end of the hand-tightening bolt 12 passes through the threaded sleeve 11 and is rotatably connected to the top plate 13 through a bearing. By rotating the hand-tightening bolt 12, the top plate 13 and the lower outer wall of the receiving groove 1 come into contact. The high-temperature resistant rubber pad 3 at the upper end of the receiving groove 1 is in close contact with the inner wall of the cylinder 14. The main function of the U-shaped clamp 9 is to keep the cylinder 14 and the tooling stable during the welding process, so as not to vibrate or shift.

[0022] In actual use, depending on the required length of the stainless steel cylinder 14, rotate the appropriate length of the receiving groove 1 and place it inside the copper cylinder 14, securing it with the U-shaped clip 9. Ensure that the upper end of the receiving groove 1 is below the weld. Before starting welding, turn on the gas switch of the protective device 3-5 seconds in advance to allow the inert gas to fully expel the air from the pipeline, forming a stable protective gas layer to prevent the weld from being oxidized in the initial stage. Adjust the welding parameters according to the welding process requirements, and adjust and fix the distance and angle between the protective device and the welding area to ensure that the protective gas can effectively protect the weld.

[0023] During welding, it is essential to maintain a stable welding speed and welding current, while ensuring the relative position of the protective device and the welding area remains stable. Improper operation should be avoided to prevent changes in the coverage of the protective gas, which could affect weld quality.

[0024] After welding, do not immediately turn off the gas switch of the protective device. Continue to supply gas for 3-5 seconds to allow the weld to cool in the protective gas atmosphere, preventing the hot weld from oxidizing in the air. Once the weld has cooled, turn off the gas switch of the protective device, then close the gas cylinder valve, and finally shut down the welding equipment.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An inert gas device for protecting the formation of longitudinal weld seams, characterized in that: include: A receiving tank (1) is provided with an air inlet pipe (6) fixedly installed at one end of the receiving tank (1) and a corrosion-resistant air diffuser pipe (7) fixedly installed at the inner end of the receiving tank (1). One end of the air inlet pipe (6) passes through the side wall of the receiving tank (1) and is fixedly connected to one end of the corrosion-resistant air diffuser pipe (7). A perforated copper plate (5) is installed at the inner end of the receiving tank (1). The perforated copper plate (5) is located at the upper end of the corrosion-resistant gas venting pipe (7). Outer flanges (2) are fixedly installed on both the left and right sides of the upper end of the receiving tank (1). A high-temperature resistant rubber pad (3) is fixedly installed at the upper end of the outer flange (2). A U-shaped clip (9) is connected to the lower end of the receiving tank (1).

2. The inert gas device for protecting the formation of longitudinal welds according to claim 1, characterized in that: The erosion gas pipe (7) is U-shaped. One end of the erosion gas pipe (7) is fixedly connected to the air inlet pipe (6), and the other end is fixedly connected to the inner wall of the receiving groove (1). Several air dispersing holes are evenly opened on the erosion gas pipe (7).

3. The inert gas device for protecting the formation of longitudinal welds according to claim 1, characterized in that: The inner walls of the left and right ends of the receiving groove (1) are fixedly installed with baffles (4), and the perforated copper plate (5) is placed above the baffles (4).

4. The inert gas device for protecting the formation of longitudinal welds according to claim 1, characterized in that: The inner side of the high-temperature resistant rubber pad (3) is higher than the outer side.

5. An inert gas device for protecting the formation of longitudinal welds according to claim 1, characterized in that: Two U-shaped cards (9) are provided, which are respectively fitted onto the lower side of the front and rear ends of the receiving groove (1). A snap-fit ​​groove (10) is opened on one side of the upper end of the U-shaped card (9), and the snap-fit ​​groove (10) snaps onto the cylinder (14).

6. An inert gas device for protecting the formation of longitudinal welds according to claim 5, characterized in that: A threaded sleeve (11) is fixedly installed at the bottom of the U-shaped card (9). The threaded sleeve (11) penetrates the lower side wall of the U-shaped card (9). A hand-tightening bolt (12) is connected to the threaded sleeve (11) internally. One end of the hand-tightening bolt (12) passes through the threaded sleeve (11) and is rotatably connected to the top plate (13) through the bearing.

7. An inert gas device for protecting the formation of longitudinal welds according to claim 6, characterized in that: The top plate (13) and the lower outer wall of the receiving groove (1) abut against each other.

8. An inert gas device for protecting the formation of longitudinal welds according to claim 1, characterized in that: A quick connector (8) is fixedly installed at the end of the air inlet pipe (6) away from the corrosion-resistant air diffuser pipe (7).

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