A pipeline welding gas protection device

Abstract

The utility model provides a pipeline welding gas protection device, which relates to the technical field of welding gas protection devices. The pipeline welding gas protection device comprises a protection device main body, an argon gas connecting pipe, and an adjusting mechanism. The interior of the protection device main body is hollow, and an opening is provided on the top; the argon gas connecting pipe is communicated with the interior of the protection device main body; the adjusting mechanism is arranged at the bottom of the protection device main body; the top front end and the top rear end of the protection device main body are both provided with arc plates; the interior of the protection device main body is provided with an upper gas outlet plate and a lower gas outlet plate spaced up and down; the upper gas outlet plate and the lower gas outlet plate are both provided with exhaust holes evenly arranged; the pipeline welding gas protection device of the utility model is accurately clamped at the weld where the flange and the gas supply pipeline need to be welded, so as to realize point-to-point protection in the process of argon arc welding, and the argon gas protection effect is strong. While ensuring the welding quality, the consumption and waste of the shielding gas are greatly reduced, and the welding cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding gas protection devices, and more specifically to a pipeline welding gas protection device. Background Art

[0002] Argon arc welding is a welding technology that uses argon as a shielding gas, also known as argon gas shielded welding. It uses high current to melt the welding material into a liquid on the base material to form a molten pool, so that the metal to be welded and the welding material can achieve metallurgical bonding. Argon arc welding passes argon shielding gas around the arc welding, and continuously supplies argon during high-temperature molten welding. The argon gas protects the metal welding material and isolates the air outside the welding area, so that the welding material cannot contact the oxygen in the air, thereby preventing the oxidation of the welding material. Therefore, stainless steel and iron hardware metals can be welded.

[0003] The ship's internal combustion engine is connected to a gas supply pipeline for transporting energy fuels. The gas supply pipeline is used to pass gaseous or liquid ammonia, methanol, natural gas and other fuels. When welding the gas supply pipeline using argon arc welding technology, flanges are welded at both ends of the gas supply pipeline.

[0004] At present, when performing argon arc welding, for workpieces with smaller volumes, they can be placed in a vacuum box for welding, but this method has a high welding cost, and because the shape and length of the non-standard gas supply pipeline are not uniform, it is not suitable for placing it in a vacuum box for argon arc welding. The current existing method for performing argon arc welding of non-standard gas supply pipelines is to place two flanges at the two ends of the gas supply pipeline respectively, extend the argon gas pipe into the interior of the gas supply pipeline through one of the flange ports, and then stick tape on the flanges, respectively seal the flange ports of the two flanges, and introduce argon gas into the interior of the gas supply pipeline so that the argon gas fills the interior of the gas supply pipeline, and protects the metal welding material during the welding process, but this method requires argon gas to fill the interior of the gas supply pipeline. Since the internal space of the gas supply pipeline is large, a large amount of argon gas will be wasted, and the method of sticking tape on the flange to seal the flange port is time-consuming and labor-intensive, inconvenient to operate, and reduces welding efficiency. Utility Model Content

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a pipeline welding gas protection device, including a protection device body, an argon gas connecting pipe, and an adjusting mechanism. The interior of the protection device body is hollow, and an opening is opened on the top; the argon gas connecting pipe is connected to the interior of the protection device body; the adjusting mechanism is arranged at the bottom of the protection device body; the top front end and the top rear end of the protection device body are both provided with arc plates; the interior of the protection device body is provided with an upper gas outlet plate and a lower gas outlet plate spaced apart from each other; the upper gas outlet plate and the lower gas outlet plate are both provided with evenly arranged exhaust holes.

[0006] Furthermore, the adjustment mechanism includes a spring, a connecting plate, a bolt, and a support plate. The upper end of the spring is fixedly connected to the bottom of the protective device body through the connecting plate; the lower end of the spring is fixedly connected with a nut; the nut is fitted on the bolt; and the lower end of the bolt is fixedly connected to the support plate.

[0007] Furthermore, the argon gas connecting pipe is in a Y shape.

[0008] Furthermore, two spaced connection holes are provided on the front side wall of the protection device body; the front end of the argon gas connection tube is connected to the argon gas source, and the rear ends of the argon gas connection tube are respectively connected to the corresponding connection holes on the front side wall of the protection device body.

[0009] Furthermore, the upper air outlet plate and the lower air outlet plate are both arranged horizontally; and the lower air outlet plate is located above the connecting hole.

[0010] Furthermore, the spring is a compression spring.

[0011] Furthermore, the arc plate is detachably arranged on the top of the protective device body; the lower part of the arc plate is fixedly connected with a connecting block; the top of the protective device body is provided with a slot matching with the connecting block; the connecting block is inserted into the slot to connect the arc plate to the top of the protective device body.

[0012] Compared with the prior art, the pipeline welding gas protection device of the utility model has the following beneficial effects:

[0013] 1) Cost saving: The setting of the main body of the protection device can gather argon gas in the main body of the protection device during welding, and accurately clamp the position of the main body of the protection device at the weld where the flange and the gas supply pipeline need to be welded, so as to achieve point-to-point protection during argon arc welding. The argon gas protection effect is strong, which greatly reduces the consumption and waste of shielding gas while ensuring the welding quality, and saves welding costs;

[0014] 2) Ensure welding quality: The spacing between the upper and lower gas outlet plates buffers the gas flow rate of argon, so that the argon will not directly impact the welding position, and the argon can contact the welding position more smoothly, ensuring the quality of welding; the exhaust holes on the upper and lower gas outlet plates make the argon evenly and reliably distributed in the weld area, preventing oxidation of the weld area, improving welding quality, reducing welding defects, and improving the protective effect of argon on metal welding materials during welding;

[0015] 3) Improve production efficiency: The pipeline welding gas protection device of the utility model has a simple structure, is convenient and quick to use, and uses the pipeline welding gas protection device of the utility model to perform argon gas protection on the welding of the gas supply pipeline and the flange, thereby reducing the waste of labor time caused by sealing the flange port with tape, saving time and effort, and improving welding efficiency;

[0016] 4) Strong applicability: By replacing arc plates of different specifications, the applicability of the pipeline welding gas protection device of the utility model is improved, and irregular weldments such as stainless steel and iron pipelines of different diameters can be welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a structural schematic diagram of the pipeline welding gas protection device of the utility model.

[0019] Figure 2 It is a top view of the main body of the protective device.

[0020] Figure 3 Schematic diagram of the positional relationship between the upper air outlet plate and the lower air outlet plate.

[0021] Figure 4 The utility model is a schematic diagram of the working state of the pipeline welding gas protection device.

[0022] Figure 5 Schematic diagram of the position relationship between the gas supply pipeline and the flange.

[0023] Figure 6 for Figure 5 Top view of the .

[0024] Explanation of symbols in the figure:

[0025] 1. Protective device body; 2. Argon gas connecting pipe; 3. Arc plate; 4. Upper gas outlet plate; 5. Lower gas outlet plate; 6. Exhaust hole; 7. Spring; 8. Connecting block; 9. Bolt; 10. Support plate; 11. Nut; 12. Connecting hole; 13. Gas supply pipeline; 14. Flange; 15. Weld. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] The pipeline welding gas protection device provided by the embodiment of the utility model is now described. Figure 1-Figure 3As shown, a pipeline welding gas protection device comprises a protection device body 1, an argon gas connecting pipe 2, and an adjusting mechanism. The interior of the protection device body 1 is hollow, and an opening is provided on the top; the argon gas connecting pipe 2 is connected to the interior of the protection device body 1; the adjusting mechanism is arranged at the bottom of the protection device body 1; the top front end and the top rear end of the protection device body 1 are both provided with an arc plate 3; the interior of the protection device body 1 is provided with an upper gas outlet plate 4 and a lower gas outlet plate 5 spaced apart from each other; the upper gas outlet plate 4 and the lower gas outlet plate 5 are both provided with evenly arranged exhaust holes 6, and the evenly arranged exhaust holes 6 enable the argon gas to more evenly contact the welding position of the flange 14 and the gas supply pipeline 13, and the argon gas is evenly and reliably distributed in the weld area, thereby preventing oxidation of the weld area, improving welding quality, reducing welding defects, and improving the protective effect of argon gas on metal welding materials during welding.

[0028] The setting of the adjustment mechanism enables the pipeline welding gas protection device of the utility model to be applicable to the argon arc welding operation of gas supply pipelines 13 with different pipe diameters. The adjustment mechanism includes a spring 7, a connecting plate, a bolt 9, and a support plate 10. The upper end of the spring 7 is fixedly connected to the bottom of the protection device body 1 through the connecting plate; the lower end of the spring 7 is fixedly connected with a nut 11; the spring 7 uses a compression spring 7, and the protection device body 1 is manually driven to move the compression spring 7 downward, so that the pipeline welding gas protection device can be placed inside the gas supply pipeline 13, and the protection device body 1 supports the inner wall of the gas supply pipeline 13 under the elastic force of the spring 7. The nut 11 is sleeved on the bolt 9, and the lower end of the bolt 9 is fixedly connected to the support plate 10. After the pipeline welding gas protection device of the utility model is placed inside the gas supply pipeline 13, the support plate 10 is pressed against the inner wall of the gas supply pipeline 13 under the elastic force of the spring 7, and plays a supporting role. By twisting the nut 11 and changing the position of the nut 11 on the stud of the bolt 9, the distance between the support plate 10 and the protection device body 1 can be adjusted, thereby improving the applicability of the pipeline welding gas protection device of the utility model.

[0029] The opening position at the top of the protection device body 1 corresponds to the position where the flange 14 and the gas supply pipeline 13 are welded, and two spaced connection holes 12 are provided on the front side wall of the protection device body 1. The argon gas connection pipe 2 is Y-shaped, and the front end of the argon gas connection pipe 2 is connected to the argon gas source, and the two ends of the rear side of the argon gas connection pipe 2 are respectively connected to the connection holes 12 on the front side wall of the protection device body 1. The argon gas source transports argon gas to the inside of the protection device body 1 through the argon gas connection pipe 2, and argon gas protection is performed on the welding point between the flange 14 and the gas supply pipeline 13.

[0030] like Figure 1 , Figure 3As shown, the upper gas outlet plate 4 and the lower gas outlet plate 5 are both arranged horizontally, and the lower gas outlet plate 5 is located above the connection hole 12. After the argon gas is transported to the inside of the protection device body 1 through the argon gas connection pipe 2, the argon gas first flows through the exhaust hole 6 of the lower gas outlet plate 5, and then flows through the exhaust hole 6 of the upper gas outlet plate 4, and then the welding position of the flange 14 and the gas supply pipeline 13 is protected by argon gas. The interval between the upper gas outlet plate 4 and the lower gas outlet plate 5 has a buffering effect on the gas flow rate of the argon gas, so that the argon gas will not directly impact the welding position, so that the argon gas can contact the welding position more smoothly, ensuring the quality of welding.

[0031] The arc plate 3 is detachably arranged on the top of the protection device body 1; the top arc edge of the arc plate 3 is used to match the arc inner wall of the gas supply pipeline 13. The lower part of the arc plate 3 is fixedly connected with a connecting block 8; the top of the protection device body 1 is provided with a slot that matches the connecting block 8; the connecting block 8 is inserted into the slot to connect the arc plate 3 to the top of the protection device body 1. By providing the connecting block 8, the arc plate 3 is detachably connected to the top of the protection device body 1. When argon arc welding is performed on gas supply pipelines 13 of different diameters, the arc plate 3 can be removed from the protection device body 1 and replaced with arc plates 3 of different specifications to adapt to the argon arc welding requirements of gas supply pipelines 13 of different diameters.

[0032] like Figure 4-Figure 6 As shown, the working method of the pipeline welding gas protection device of the utility model is as follows: compress the spring 7, put the pipeline welding gas protection device into the gas supply pipeline 13 to be welded, and under the action of the elastic force of the spring 7, the top of the protection device body 1 presses upward against the inner side wall of the top of the gas supply pipeline 13, so that the welding position of the flange 14 and the gas supply pipeline 13 is located above the opening of the protection device body 1; under the action of the elastic force of the spring 7, the support plate 10 presses downward against the inner side wall of the bottom of the gas supply pipeline 13, so as to support the entire pipeline welding gas protection device;

[0033] The argon gas source delivers argon gas to the inside of the protection device body 1 through the argon gas connection pipe 2. The argon gas first flows through the lower gas outlet plate 5 and then flows through the upper gas outlet plate 4, and performs argon gas protection on the welding point between the flange 14 and the gas supply pipeline 13.

[0034] When welding gas supply pipelines 13 of different diameters, the arc plate 3 can be removed from the top of the protection device body 1 and replaced with an arc plate 3 of corresponding specifications to meet the argon arc welding requirements of gas supply pipelines 13 of different diameters.

[0035] Compared with the prior art, the pipeline welding gas protection device of the utility model has the following beneficial effects:

[0036] 1) Cost saving: The setting of the protection device body 1 can gather argon gas in the protection device body 1 during welding, and the position of the protection device body 1 is accurately clamped at the weld 15 where the flange 14 and the gas supply pipeline 13 need to be welded, so as to achieve point-to-point protection during argon arc welding. The argon gas protection effect is strong. Compared with the existing argon gas protection method of sealing the flange 14 with tape so that argon gas fills the entire gas supply pipeline 13, the pipeline welding gas protection device of the utility model greatly reduces the consumption and waste of shielding gas while ensuring the welding quality, thereby saving welding costs;

[0037] 2) Ensure welding quality: The interval between the upper gas outlet plate 4 and the lower gas outlet plate 5 plays a buffering role on the gas flow rate of argon, so that the argon will not directly impact the welding position, so that the argon can contact the welding position more smoothly, ensuring the quality of welding; the arrangement of the exhaust holes 6 on the upper gas outlet plate 4 and the lower gas outlet plate 5 makes the argon uniformly and reliably distributed in the weld 15 area, preventing oxidation of the welding area, improving welding quality, reducing welding defects, and improving the protective effect of argon on metal welding materials during welding;

[0038] 3) Improve production efficiency: The pipeline welding gas protection device of the utility model has a simple structure and is convenient and quick to use. The pipeline welding gas protection device of the utility model is used to perform argon protection on the welding of the gas supply pipeline 13 and the flange 14, thereby reducing the waste of labor time caused by sealing the flange 14 with tape, saving time and labor, and improving welding efficiency;

[0039] 4) Strong applicability: By replacing arc plates 3 of different specifications, the applicability of the pipeline welding gas protection device of the utility model is improved, and irregular weldments such as stainless steel and iron pipelines of different diameters can be welded.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 present invention.

Claims

1. A pipeline welding gas protection device, characterized in that: It includes a protection device body, an argon gas connecting pipe, and an adjusting mechanism. The interior of the protection device body is hollow and has an opening on the top. The argon gas connecting pipe is connected to the interior of the protection device body. The adjusting mechanism is arranged at the bottom of the protection device body. The top front end and the top rear end of the protection device body are both provided with arc plates. The interior of the protection device body is provided with an upper air outlet plate and a lower air outlet plate spaced apart from each other. The upper air outlet plate and the lower air outlet plate are both provided with evenly arranged exhaust holes.

2. The pipeline welding gas protection device according to claim 1, characterized in that: The adjustment mechanism includes a spring, a connecting plate, a bolt, and a support plate. The upper end of the spring is fixedly connected to the bottom of the protective device body through the connecting plate; the lower end of the spring is fixedly connected with a nut; the nut is fitted on the bolt; the lower end of the bolt is fixedly connected to the support plate.

3. The pipeline welding gas protection device according to claim 2, characterized in that: The argon gas connecting pipe is in a Y shape.

4. The pipeline welding gas protection device according to claim 3, characterized in that: Two spaced connection holes are provided on the front side wall of the protection device body; the front end of the argon gas connection tube is connected to the argon gas source, and the rear ends of the argon gas connection tube are respectively connected to the corresponding connection holes on the front side wall of the protection device body.

5. The pipeline welding gas protection device according to claim 4, characterized in that: The upper air outlet plate and the lower air outlet plate are both arranged horizontally; the lower air outlet plate is located above the connecting hole.

6. The pipeline welding gas protection device according to claim 5, characterized in that: The spring is a compression spring.

7. The pipeline welding gas protection device according to claim 6, characterized in that: The arc plate is detachably arranged on the top of the protective device body; a connecting block is fixedly connected to the lower part of the arc plate; a slot matching the connecting block is arranged on the top of the protective device body; the connecting block is inserted into the slot to connect the arc plate to the top of the protective device body.

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