Pipeline welding plugging device

Abstract

The utility model belongs to the technical field of pipeline welding, and particularly relates to a pipeline welding plugging device which comprises a first pipeline and a second pipeline, a first partition plate is arranged on the inner side of the first pipeline, a second partition plate is arranged on the inner side of the second pipeline, and an exhaust structure is installed on the side, close to the second partition plate, of the first partition plate. The exhaust structure is used for exhausting gas between the first partition plate and the second partition plate and comprises a first air bag fixed to the side, close to the second partition plate, of the first partition plate, a first connecting pipe is installed on the side, close to the first partition plate, of the first air bag, and the first connecting pipe penetrates through the first partition plate and extends to the outer side of the first pipeline. A ventilation pipe is fixed to the side, away from the first partition plate, in the first air bag, and an electromagnetic valve is installed in the ventilation pipe. According to the pipeline welding device, waste of inert gas can be avoided, the pipeline welding requirements of different specifications and different space structures can be met, and it is guaranteed that the inert gas is kept in a pure state after being introduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline welding, and particularly relates to a pipeline welding plugging device. Background Technique

[0002] In the field of pipeline welding, especially during the welding of stainless steel and non-ferrous metal pipelines, the need to prevent high-temperature oxidation on the back of the weld seam is becoming increasingly prominent. Traditionally, tungsten inert gas arc welding construction technology is mostly used for the welding of these pipelines. The molten pool and heat-affected zone formed by this technology have high temperatures and are prone to oxidizing important elements in the metal, thus affecting the welding quality. Therefore, during the welding process, it is necessary to isolate air and protect both the front and back of the weld seam, and inert gas is the key to achieving this protection effect;

[0003] Currently, the commonly used methods for inert gas protection inside pipelines in the industry mainly include the following several types:

[0004] Tape plugging method, where both ends of the pipeline are plugged with tape, an inert gas filling pipe is connected to one end, and a ventilation hole is drilled at the other end. However, in the welding of large-diameter and long pipelines, due to the large inflation space, long replacement time, and easy waste of inert protection gas;

[0005] Rubber plug plate method, rubber plug plates that fit tightly against the inner wall of the pipeline are inserted at certain positions on both sides of the weld seam to form a small sealed cavity. Although this method reduces the replacement time and the consumption of inert protection gas to a certain extent, for pipeline systems of various specifications, various specifications of rubber plug plates need to be manufactured, and it is relatively difficult to remove them after welding;

[0006] Although the above methods solve the problem of inert gas protection in pipeline welding to a certain extent, there are still many limitations. Based on this, this application proposes an improved pipeline welding plugging device. Content of the Utility Model

[0007] The purpose of the utility model is to provide a pipeline welding plugging device that can avoid waste of inert gas, can adapt to the welding requirements of pipelines with different specifications and different spatial structures, and ensure that the inert gas remains in a relatively pure state after being introduced.

[0008] The technical solution adopted by the utility model is specifically as follows:

[0009] A pipeline welding plugging device includes a first pipeline and a second pipeline. A first partition is arranged inside the first pipeline, and a second partition is arranged inside the second pipeline. An exhaust structure is installed on the side of the first partition close to the second partition, and the exhaust structure is used to discharge the gas between the first partition and the second partition.

[0010] The exhaust structure includes a first airbag fixed on one side of the first partition plate close to the second partition plate. A first connecting pipe is installed on one side of the first airbag close to the first partition plate, and the first connecting pipe passes through the first partition plate and extends to the outside of the first pipe. A ventilation pipe is fixed on the side of the first airbag away from the first partition plate, and a solenoid valve is installed inside the ventilation pipe.

[0011] A ventilation component is installed on the side of the second partition plate away from the first partition plate, and the ventilation component is used to discharge gas.

[0012] The ventilation component includes a mounting rack fixed on the side of the second partition plate away from the first partition plate. A sliding rod is slidably connected inside the mounting rack. One end of the sliding rod close to the second partition plate is fixed with a contact ball, and a spring is installed between the contact ball and the mounting rack and outside the sliding rod. A through hole is provided inside the second partition plate at a position corresponding to the contact ball, and the contact ball is used to block the through hole.

[0013] The technical effects achieved by the present utility model are as follows:

[0014] The present utility model can introduce inert gas into two welded pipes. Through the mutual cooperation of the first partition plate and the second partition plate, waste of inert gas is avoided, and it can meet the welding requirements of pipes with different specifications and different spatial structures. It can ensure that the inert gas remains in a relatively pure state after being introduced and will not be mixed with other gases, thereby significantly improving the welding effect. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a cross-sectional view of the first pipe in the present utility model;

[0017] Figure 3 is a schematic structural diagram between the first airbag, the first partition plate and the second connecting pipe in the present utility model;

[0018] Figure 4 is a cross-sectional view of the first airbag in the present utility model;

[0019] Figure 5 is a schematic structural diagram between the through hole, the spring and the mounting rack in the present utility model.

[0020] In the drawings, the list of components represented by each reference numeral is as follows:

[0021] 1. First pipeline; 2. Second pipeline; 3. First partition; 4. First airbag; 5. First connecting pipe; 6. Vent pipe; 7. Solenoid valve; 8. Second airbag; 9. Second connecting pipe; 10. Second partition; 11. Through hole; 12. Contact ball; 13. Sliding rod; 14. Mounting bracket; 15. Spring; 16. Empty slot; 17. Support frame; 18. Connecting rod. Detailed implementation mode

[0022] In order to make the purpose and advantages of the present utility model clearer, the present utility model will be specifically described below in conjunction with embodiments. It should be understood that the following text only describes one or several specific implementation modes of the present utility model, and does not strictly limit the scope of protection specifically claimed by the present utility model.

[0023] As Figures 1-5 shown, a pipeline welding and plugging device includes a first pipeline 1 and a second pipeline 2. At least one support frame 17 is assembled on the outer sides of the first pipeline 1 and the second pipeline 2. Through the setting of the support frame 17, the support frame 17 can support the first pipeline 1 and the second pipeline 2, so that the welding effect can be better carried out. A first partition 3 is arranged inside the first pipeline 1, and a second partition 10 is arranged inside the second pipeline 2. Align the end faces of the first pipeline 1 and the second pipeline 2 that need to be welded, and move the first partition 3 and the second partition 10 to a position close to the end face;

[0024] Connecting rods 18 are fixed on the sides of the second partition 10 and the first partition 3 that are away from each other. Through the connecting rods 18, the movement effect of the first partition 3 and the second partition 10 can be completed. An exhaust structure is installed on the side of the first partition 3 close to the second partition 10. The exhaust structure is used to discharge the gas between the first partition 3 and the second partition 10. A second airbag 8 is arranged outside the first partition 3. A second connecting pipe 9 is installed inside the second airbag 8, and the second connecting pipe 9 passes through the first partition 3 and extends to the outside of the first pipeline 1. Through this setting, first, when moving the first partition 3, since the first partition 3 does not contact the first pipeline 1, the first partition 3 can be moved better, and the air pressure between the first partition 3 and the second partition 10 is reduced. When the first partition 3 plugs the space between the first partition 3 and the second partition 10, gas can be introduced into the second airbag 8 through the second connecting pipe 9. The second airbag 8 gradually expands and contacts the first pipeline 1, realizing the plugging effect of the first partition 3 and the second airbag 8 on the first pipeline 1, thereby further increasing the plugging effect;

[0025] Refer to the attached Figures 3-4, the exhaust structure includes a first airbag 4 fixed to the side of the first partition 3 close to the second partition 10. The inside of the first airbag 4 is hollow, and the first airbag 4 is made of a flexible material, which can be a material with inflation and reset effects, such as rubber. A first connecting pipe 5 is installed on the side of the first airbag 4 close to the first partition 3, and the first connecting pipe 5 passes through the first partition 3 and extends to the outside of the first pipe 1. A ventilation pipe 6 is fixed inside the first airbag 4 and away from the first partition 3, and a solenoid valve 7 is installed inside the ventilation pipe 6;

[0026] When the first partition 3 moves to a suitable position, gas can be introduced into the first airbag 4 through the first connecting pipe 5, causing the first airbag 4 to expand. The gas introduced into the first airbag 4 is an inert gas, such as nitrogen, which can isolate oxygen in the air, prevent the metal from oxidizing during welding, thereby improving the welding quality. At the same time, the use of nitrogen can also ensure the correct progress of the welding operation, reduce the generation of residues. In addition, nitrogen can improve the wettability of welding, enabling the metal to fuse better, etc.;

[0027] A ventilation component is installed on the side of the second partition 10 away from the first partition 3, and the ventilation component is used to exhaust gas.

[0028] After introducing the gas, the first airbag 4 expands, gradually occupying the space between the first partition 3 and the second partition 10. Through the setting of the ventilation component, the second partition 10 can exhaust most of the gas originally between the second partition 10 and the first partition 3. At this time, the solenoid valve 7 can be opened and the inert gas can be released through the ventilation pipe 6, and the first airbag 4 gradually shrinks, so that most of the space between the first partition 3 and the second partition 10 is filled with inert gas, making welding easier.

[0029] Refer to the appendix Figure 5 , the ventilation component includes a mounting frame 14 fixed to the side of the second partition 10 away from the first partition 3. A plurality of empty slots 16 are provided on the outer side of the mounting frame 14. Through the setting of the empty slots 16, the gas discharged from the through hole 11 can be discharged to the outside through the empty slots 16. A sliding rod 13 is slidably connected inside the mounting frame 14. A ball 12 is fixed to one end of the sliding rod 13 close to the second partition 10, and a spring 15 is installed between the ball 12 and the mounting frame 14 and on the outside of the sliding rod 13. A through hole 11 is provided inside the second partition 10 at a position corresponding to the ball 12, and the ball 12 is used to block the through hole 11. The diameter of the ball 12 is larger than the diameter of the through hole 11, thereby achieving the blocking effect of the ball 12 on the through hole 11;

[0030] When in use, when the first airbag 4 discharges all the gas between the first partition plate 3 and the second partition plate 10, through the extrusion of the internal gas on the abutting ball 12, the abutting ball 12 compresses the spring 15, and compresses along the sliding rod 13 through the spring 15, so that the abutting ball 12 is separated from the through hole 11. The gas between the first partition plate 3 and the second partition plate 10 is discharged through the through hole 11. After the discharge is complete, the pressure on the abutting ball 12 decreases. At this time, the elastic force of the spring 15 is greater than the pressure of the gas, so that the abutting ball 12 resets and re-seals the through hole 11, realizing the sealing effect between the second partition plate 10 and the first partition plate 3, and sealing the inert gas to ensure the welding effect.

[0031] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. The structures, devices and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. A pipeline welding plugging device, comprising a first pipeline (1) and a second pipeline (2), characterized in that: A first partition plate (3) is arranged on the inner side of the first pipe (1), a second partition plate (10) is arranged on the inner side of the second pipe (2), and an exhaust structure is installed on a side of the first partition plate (3) close to the second partition plate (10), the exhaust structure being used to exhaust the gas between the first partition plate (3) and the second partition plate (10).

2. A pipeline welding plugging device according to claim 1, characterized in that: The exhaust structure comprises a first air bag (4) fixed to a side of the first baffle (3) close to the second baffle (10); a first connecting pipe (5) is installed on a side of the first air bag (4) close to the first baffle (3), and the first connecting pipe (5) passes through the first baffle (3) and extends to the outside of the first pipe (1); a ventilation pipe (6) is fixed inside the first air bag (4) and on a side away from the first baffle (3); a solenoid valve (7) is installed inside the ventilation pipe (6); An exhaust component is installed on the side of the second partition plate (10) away from the first partition plate (3), and the exhaust component is used to exhaust gas.

3. A pipeline welding plugging device according to claim 2, characterized in that: The exhaust assembly includes a mounting frame (14) fixed on the side of the second partition (10) away from the first partition (3); the mounting frame (14) is slidably connected to a sliding rod (13) inside; an abutment ball (12) is fixed to one end of the sliding rod (13) close to the second partition (10); a spring (15) is installed between the abutment ball (12) and the mounting frame (14) and on the outside of the sliding rod (13); a through hole (11) is provided inside the second partition (10) and at a position corresponding to the abutment ball (12); the abutment ball (12) is used to block the through hole (11).

4. A pipeline welding plugging device according to claim 1, characterized in that: At least one support frame (17) is mounted on the outer sides of the first pipe (1) and the second pipe (2).

5. The pipeline welding plugging device according to claim 1, characterized in that: A second air bag (8) is arranged on the outer side of the first partition plate (3), a second connecting pipe (9) is installed in the second air bag (8), and the second connecting pipe (9) passes through the first partition plate (3) and extends to the outer side of the first pipe (1).

6. A pipeline welding plugging device according to claim 3, characterized in that: The outer side surface of the mounting frame (14) is provided with a plurality of empty slots (16).

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