Inflation protection device for welding gold mouth of steel pipe

Abstract

The utility model discloses a steel pipe gold mouth welding inflation protection device, and relates to the field of welding inflation protection. The steel pipe gold opening welding inflation protection device comprises a plurality of pipeline bodies, a first circular sealing plate, a second circular sealing plate, an exhaust unit and a fixing unit. According to the steel pipe gold opening welding inflation protection device, gas in the connecting frame is exhausted, it is guaranteed that the space between the first circular sealing plate and the second circular sealing plate is filled with inert gas, the inert gas protects the welding process, and when gas continues to be fed through the connecting hole, the first circular sealing plate and the second circular sealing plate are pushed to be separated; the inflation preparation working time and the inflation time are reduced, and after the first circular sealing plate and the second circular sealing plate are filled with gas, continuous inflation is not needed, so that the usage amount of inert gas is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of welding gas protection, in particular to a steel pipe golden mouth welding gas protection device. Background Art

[0002] At present, when welding stainless steel and non-ferrous metal alloy steel process pipelines, the back inflation protection method and device are to use sponge and water-soluble tape. According to the different specifications of pipe diameters, matching sponge blocks are cut and inserted into both sides of the weld in the steel pipe. The argon ventilation pipe is passed into the closed space through the sponge, and the water-soluble tape is used as a fixing auxiliary to inflate the stainless steel and non-ferrous metal alloy steel process pipelines during welding. As a result, the process is cumbersome during operation, there is a lot of preparation work before welding, and the inflation time is also long due to the large inflation volume. Especially for process pipelines or pipe fittings with long extensions at both ends of larger pipe diameter welds, or the last closing weld of the pipeline docking, which is called golden joint welding, it is impossible to seal and inflate, or the sealing material cannot be removed after sealing to block the pipeline, making it difficult to meet the technical requirement of the oxygen content of the inflation being less than 0.1%. In addition, the large inflation volume leads to large gas consumption, low construction efficiency, and the occurrence of safety accidents such as suffocation of welding workers.

[0003] To address existing issues and simplify the gasification process for stainless steel and nonferrous alloy pipes, while maintaining the GTAW welding method without changing the welding method, a golden-mouth gasification protection device was invented. This device addresses the issue of excessive oxygen content in the weld, which can be caused by the difficulty in sealing and gassing the final weld where process pipelines or fittings extend long distances from each end of the weld. This device also reduces gasification preparation time and gasification time, significantly reducing inert gas usage and gasification costs, improving construction efficiency, and preventing safety accidents such as suffocation of welders caused by prolonged gasification. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides a steel pipe golden-mouth welding inflation protection device, which solves the problems that the operation process is cumbersome, there is a lot of preparation work before starting welding, the inflation volume is large and the inflation time is also long, especially for process pipelines or pipe fittings with longer extensions at both ends of larger diameter welds, or the last closing weld of pipeline docking, which is called golden-mouth welding, it is impossible to seal and inflate, or the sealing material cannot be removed to block the pipeline after sealing, and it is difficult to achieve the technical requirement of the oxygen content of the inflation being lower than 0.1%. In addition, the large inflation volume leads to large gas consumption, low construction efficiency, and the possibility of safety accidents such as suffocation of welding workers.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a steel pipe golden mouth welding inflatable protection device, comprising a plurality of pipe bodies, a first circular sealing plate, a second circular sealing plate, an exhaust unit and a fixing unit, wherein the first circular sealing plate and the second circular sealing plate are respectively located in the corresponding pipe bodies, and the exhaust unit and the fixing unit are respectively correspondingly arranged on the first circular sealing plate and the second circular sealing plate;

[0006] The exhaust unit includes a sealing plate mounted on a first circular sealing plate by bolts, wherein a plurality of air supply pipes are fixedly connected to the sealing plate, and the ends of the air supply pipes are located on both sides of the first circular sealing plate;

[0007] The fixing unit includes a plurality of connecting bolts rotatably connected to the inner wall of the second circular sealing plate. The connecting bolts are correspondingly provided with connecting seats, and the connecting seats are fixedly connected to the outer wall of the first circular sealing plate.

[0008] Preferably, a first bolt is threadedly connected to the inner wall of the first circular sealing plate, and a second bolt is threadedly connected to the inner wall of the second circular sealing plate.

[0009] Preferably, holes are provided on both sides of the first bolt and the second bolt, and the first sealing plate traction ring and the second sealing plate traction ring are connected to the corresponding sides of the second bolt and the first bolt respectively, and a sealing plate connecting rope is connected between the corresponding two first sealing plate traction rings.

[0010] Preferably, the other side of the first bolt is connected to a first traction rope, and the other side of the second bolt is connected to a second traction rope.

[0011] Preferably, a connection frame is fixedly connected to the outer wall of the first circular sealing plate, and an exhaust pipe is slidably connected to the inner wall of the connection frame.

[0012] Preferably, a limiting block is fixedly connected to the outer wall of the exhaust pipe, a spring is fixedly connected to the outer wall of the limiting block, and the other end of the spring is fixedly connected to the connecting frame.

[0013] Preferably, a connection hole is provided on the exhaust pipe, and the connection hole is located inside the connection frame.

[0014] Preferably, a transmission wheel is fixedly sleeved on the outer peripheral wall of the connecting bolt, and a transmission belt is interference-fitted between the plurality of transmission wheels, and a rotating seat is fixedly connected to the outer wall of one of the connecting bolts.

[0015] The utility model discloses a steel pipe golden mouth welding inflatable protection device, which has the following beneficial effects:

[0016] The steel pipe golden mouth welding inflation protection device discharges the gas in the connection frame when the exhaust pipe moves so that the connection hole on the exhaust pipe is outside the connection frame, effectively ensuring that the space between the first circular sealing plate and the second circular sealing plate is filled with inert gas. The inert gas protects the welding process, and when air continues to enter through the connection hole, the first circular sealing plate and the second circular sealing plate are pushed apart by the extrusion of the gas, thereby reducing the inflation preparation time and inflation time. When the first circular sealing plate and the second circular sealing plate are filled with gas, there is no need to continue to inflate, which greatly saves the use of inert gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the pipeline body of the utility model;

[0020] Figure 3 This is a schematic diagram of the exhaust unit structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the fixed unit structure of the utility model.

[0022] In the figure: 1. Pipe body; 2. First circular sealing plate; 201. First traction rope; 202. First bolt; 3. Second circular sealing plate; 301. Second traction rope; 302. Second bolt; 4. Sealing plate connecting rope; 401. First sealing plate traction ring; 402. Second sealing plate traction ring; 5. Exhaust unit; 501. Connecting frame; 502. Sealing plate; 503. Air supply pipe; 504. Exhaust pipe; 505. Limiting block; 506. Spring; 6. Fixing unit; 601. Connecting bolt; 602. Transmission wheel; 603. Transmission belt; 604. Connecting seat; 605. Rotating seat. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0024] The embodiment of the present application provides a steel pipe golden-mouth welding inflation protection device, which solves the problems of cumbersome operation process, more preparation work before welding, long inflation time due to large inflation volume, inability to seal and inflate process pipelines or pipe fittings with long extensions at both ends of large-diameter welds, or the last closing weld of pipeline docking, or inability to remove the sealing material after sealing to block the pipeline, making it difficult to meet the technical requirements of inflation oxygen content, and large inflation volume leads to high gas consumption and low construction efficiency. When the exhaust pipe 504 is moved so that the connection hole on the exhaust pipe 504 is outside the connection frame 501, the gas in the connection frame 501 is discharged;

[0025] It effectively ensures that the space between the first circular sealing plate 2 and the second circular sealing plate 3 is filled with inert gas. The inert gas protects the welding process. When air continues to flow in through the connecting hole, the first circular sealing plate 2 and the second circular sealing plate 3 are pushed apart by the extrusion of the gas, thereby reducing the inflation preparation time and inflation time. After the first circular sealing plate 2 and the second circular sealing plate 3 are filled with gas, there is no need to continue to inflate, which greatly saves the use of inert gas.

[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0027] The embodiment of the utility model discloses a steel pipe golden-mouth welding inflatable protection device.

[0028] According to the attached Figure 1 As shown, it includes multiple pipe bodies 1, a first circular sealing plate 2, a second circular sealing plate 3, an exhaust unit 5 and a fixing unit 6. The first circular sealing plate 2 and the second circular sealing plate 3 are respectively located in the corresponding pipe bodies 1. A sealing ring is provided on the outer peripheral wall of the first circular sealing plate 2 and the second circular sealing plate 3. The first circular sealing plate 2 and the second circular sealing plate 3 are tightly fitted together by the sealing ring to seal the two pipe bodies 1. The exhaust unit 5 and the fixing unit 6 are respectively provided on the first circular sealing plate 2 and the second circular sealing plate 3;

[0029] According to the attached Figure 2As shown, the exhaust unit 5 includes a sealing sheet 502 mounted on the first circular sealing plate 2 by bolts, and a plurality of gas supply pipes 503 are fixedly connected to the sealing sheet 502. The two ends of the gas supply pipes 503 are located on both sides of the first circular sealing plate 2. When the exhaust pipe 504 moves so that the connection hole on the exhaust pipe 504 is outside the connection frame 501, the gas in the connection frame 501 is discharged, effectively ensuring that the space between the first circular sealing plate 2 and the second circular sealing plate 3 is filled with inert gas, and the welding process is protected by the inert gas.

[0030] According to the attached Figure 3 、 4 As shown, the fixing unit 6 includes a plurality of connecting bolts 601 rotatably connected to the inner wall of the second circular sealing plate 3, and the connecting bolts 601 are correspondingly provided with a connecting seat 604, and the connecting seat 604 is fixedly connected to the outer wall of the first circular sealing plate 2. The connecting bolts 601 are rotated to separate the connecting bolts 601 from the connecting seat 604, thereby separating the first circular sealing plate 2, the second circular sealing plate 3 and the connecting frame 501. When air continues to enter through the connecting hole, the first circular sealing plate 2 and the second circular sealing plate 3 are pushed apart by the extrusion of the gas, thereby reducing the inflation preparation time and the inflation time. When the first circular sealing plate 2 and the second circular sealing plate 3 are filled with gas, there is no need to continue to inflate, which greatly saves the use of inert gas.

[0031] A first bolt 202 is threadedly connected to the inner wall of the first circular sealing plate 2 , and a second bolt 302 is threadedly connected to the second circular sealing plate 3 .

[0032] Holes are provided on both sides of the first bolt 202 and the second bolt 302, and the corresponding sides of the second bolt 302 and the first bolt 202 are respectively connected with the first sealing plate traction ring 401 and the second sealing plate traction ring 402, and the corresponding two first sealing plate traction rings 401 are connected with a sealing plate connecting rope 4. By connecting the second sealing plate traction ring 402 on the first bolt 202 and the first sealing plate traction ring 401 on the second bolt 302 with the sealing plate connecting rope 4, the spacing between the first circular sealing plate 2 and the second circular sealing plate 3 is limited, which facilitates inflation protection between the first circular sealing plate 2 and the second circular sealing plate 3, and effectively protects the welding of the two pipeline bodies 1.

[0033] The other side of the first bolt 202 is connected to the first traction rope 201, and the other side of the second bolt 302 is connected to the second traction rope 301. The first circular sealing plate 2 is limited by the first traction rope 201, and the second circular sealing plate 3 is limited by the second traction rope 301. By pulling the position of the first traction rope 201 and the second traction rope 301, the position of the first circular sealing plate 2 and the second circular sealing plate 3 is limited, which facilitates the welding protection of the two pipe bodies 1.

[0034] After welding is completed, the blocking object is removed from the pipeline by pulling the first traction rope 201 and the second traction rope 301 .

[0035] A connecting frame 501 is fixedly connected to the outer wall of the first circular sealing plate 2, and an exhaust pipe 504 is slidably connected to the inner wall of the connecting frame 501. When the first circular sealing plate 2, the second circular sealing plate 3 and the connecting frame 501 are connected and sealed, air is inflated through the air supply pipe 503 so that the connecting frame 501 is filled with protective gas.

[0036] A limiting block 505 is fixedly connected to the outer wall of the exhaust pipe 504, and a spring 506 is fixedly connected to the outer wall of the limiting block 505. The other end of the spring 506 is fixedly connected to the connecting frame 501. At the same time, the protective gas pushes the limiting block 505 and the exhaust pipe 504 to move, so that the limiting block 505 compresses the spring 506.

[0037] The exhaust pipe 504 is provided with a connection hole, which is located inside the connection frame 501. When the exhaust pipe 504 is moved so that the connection hole on the exhaust pipe 504 is outside the connection frame 501, the gas in the connection frame 501 is exhausted, effectively ensuring that the inert gas protects the welding process.

[0038] After the specified discharge time, the connecting bolt 601 is rotated to separate the connecting bolt 601 from the connecting seat 604, and then the first circular sealing plate 2, the second circular sealing plate 3 and the connecting frame 501 are separated. When air continues to enter through the connecting hole, the first circular sealing plate 2 and the second circular sealing plate 3 are pushed apart by the extrusion of the gas, thereby reducing the inflation preparation time and inflation time. When the first circular sealing plate 2 and the second circular sealing plate 3 are filled with gas, there is no need to continue to inflate, which greatly saves the use of inert gas.

[0039] A transmission wheel 602 is fixedly sleeved on the outer peripheral wall of the connecting bolt 601, and a transmission belt 603 is interference fit between multiple transmission wheels 602. A rotating seat 605 is fixedly connected to the outer wall of one of the connecting bolts 601, and the transmission wheel 602 is driven to rotate by the rotating seat 605. Under the left and right sides of the transmission belt 603, multiple transmission wheels 602 rotate simultaneously. Under the rotation of the connecting bolt 601, the connecting bolt 601 is threadedly connected to the connecting seat 604, and then the first circular sealing plate 2, the second circular sealing plate 3 and the connecting frame 501 are connected and sealed.

[0040] By connecting the sealing plate connecting rope 4 between the second sealing plate pulling ring 402 on the first bolt 202 and the first sealing plate pulling ring 401 on the second bolt 302, the distance between the first circular sealing plate 2 and the second circular sealing plate 3 is limited, which facilitates the inflation protection between the first circular sealing plate 2 and the second circular sealing plate 3, and effectively protects the welding of the two pipeline bodies 1;

[0041] When the first circular sealing plate 2, the second circular sealing plate 3 and the connecting frame 501 are connected and sealed, the gas supply pipe 503 is used to inflate the connecting frame 501 with protective gas. At the same time, the protective gas pushes the limit block 505 and the exhaust pipe 504 to move, thereby causing the limit block 505 to compress the spring 506.

[0042] When the exhaust pipe 504 moves so that the connection hole on the exhaust pipe 504 is outside the connection frame 501, the gas in the connection frame 501 is exhausted, effectively ensuring that the inert gas protects the welding process;

[0043] After the specified discharge time, the connecting bolt 601 is rotated to separate the connecting bolt 601 from the connecting seat 604, and then the first circular sealing plate 2, the second circular sealing plate 3 and the connecting frame 501 are separated. When air continues to enter through the connecting hole, the first circular sealing plate 2 and the second circular sealing plate 3 are pushed apart by the extrusion of the gas, thereby reducing the inflation preparation time and inflation time. When the first circular sealing plate 2 and the second circular sealing plate 3 are filled with gas, there is no need to continue to inflate, which greatly saves the use of inert gas.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A steel pipe golden mouth welding inflatable protection device, characterized in that: The invention comprises a plurality of pipeline bodies (1), a first circular sealing plate (2), a second circular sealing plate (3), an exhaust unit (5) and a fixing unit (6), wherein the first circular sealing plate (2) and the second circular sealing plate (3) are respectively located in the corresponding pipeline bodies (1), and the exhaust unit (5) and the fixing unit (6) are respectively arranged on the first circular sealing plate (2) and the second circular sealing plate (3); The exhaust unit (5) comprises a sealing sheet (502) mounted on a first circular sealing plate (2) by means of bolts, a plurality of air supply pipes (503) being fixedly connected to the sealing sheet (502), and two ends of the air supply pipes (503) being located on both sides of the first circular sealing plate (2); The fixing unit (6) comprises a plurality of connecting bolts (601) rotatably connected to the inner wall of the second circular sealing plate (3), wherein the connecting bolts (601) are correspondingly provided with connecting seats (604), and the connecting seats (604) are fixedly connected to the outer wall of the first circular sealing plate (2).

2. The inflatable protective device for golden-mouth welding of steel pipes according to claim 1, characterized in that: A first bolt (202) is threadedly connected to the inner wall of the first circular sealing plate (2), and a second bolt (302) is threadedly connected to the second circular sealing plate (3).

3. The inflatable protective device for golden-mouth welding of steel pipes according to claim 2, characterized in that: Holes are provided on both sides of the first bolt (202) and the second bolt (302); the first sealing plate traction ring (401) and the second sealing plate traction ring (402) are connected to the corresponding sides of the second bolt (302) and the first bolt (202); and a sealing plate connecting rope (4) is connected between the two corresponding first sealing plate traction rings (401).

4. A steel pipe golden-mouth welding inflatable protection device according to claim 3, characterized in that: The other side of the first bolt (202) is connected to a first traction rope (201), and the other side of the second bolt (302) is connected to a second traction rope (301).

5. The inflatable protective device for golden-mouth welding of steel pipes according to claim 4, characterized in that: A connection frame (501) is fixedly connected to the outer wall of the first circular sealing plate (2), and an exhaust pipe (504) is slidably connected to the inner wall of the connection frame (501).

6. The inflatable protective device for golden-mouth welding of steel pipes according to claim 5, characterized in that: A limiting block (505) is fixedly connected to the outer wall of the exhaust pipe (504), a spring (506) is fixedly connected to the outer wall of the limiting block (505), and the other end of the spring (506) is fixedly connected to the connection frame (501).

7. A steel pipe golden-mouth welding inflatable protection device according to claim 6, characterized in that: The exhaust pipe (504) is provided with a connection hole, which is located inside the connection frame (501).

8. The inflatable protective device for golden-mouth welding of steel pipes according to claim 1, characterized in that: A transmission wheel (602) is fixedly sleeved on the outer peripheral wall of the connecting bolt (601), and a transmission belt (603) is interference-fitted between the plurality of transmission wheels (602). A rotating seat (605) is fixedly connected to the outer wall of one of the connecting bolts (601).

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