Pipeline welding protection device

Abstract

The utility model relates to the technical field of pipeline welding, in particular to a pipeline welding protection device. Comprising an argon conveying pipe, two gas conveying pipes, a magnet, an inflation device, two spherical air bags, two iron blocks and two fixing mechanisms. A connecting line is fixed between the two spherical air bags; the argon conveying pipe is used for conveying argon to the position between the two spherical air bags. The two air delivery pipes are respectively communicated with the two spherical air bags; the air charging device is used for charging air into the air delivery pipe; the iron block is used for being connected with the end of a gas conveying pipe. The magnet is used for attracting the iron block to move; the two fixing mechanisms are used for limiting the two gas conveying pipes correspondingly. According to the technical scheme, the argon gas consumption is small, and the sealing device can be suitable for sealing work of pipelines with various diameters and is suitable for inflation protection work of straight pipes and bent pipes.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline welding, in particular to a pipeline welding protection device. Background Art

[0002] During pipeline welding, in addition to appropriately protecting the high-temperature molten pool on the front side of the weld, necessary measures must also be taken on the back side of the weld to block the oxidation of the weld by oxygen in the air. If no weld protection measures are taken, the weld metal on the back side is easily oxidized during welding, alloying elements are burned out, and welding defects are likely to occur, resulting in a decrease in the mechanical properties and corrosion resistance of the weld metal.

[0003] The patent with the publication number CN109693059B discloses a pipeline welding back-inflation protection device, which relates to the technical field of pipeline welding and provides a pipeline welding back-inflation protection device that can adapt to various pipeline specifications. The two blocking airbags are respectively sleeved at both ends of the connecting piece. The blocking assembly axially penetrates an air flow pipe extending out of the two end supports. The air flow pipe is provided with a first shunt pipe and a second shunt pipe. The first shunt pipe and the second shunt pipe are respectively communicated with the two blocking airbags at both ends of the connecting piece. A partition piece for blocking the air flow is arranged in the air flow pipe. The partition piece is arranged at the position between the first shunt pipe and the second shunt pipe. First control valves for opening and closing the first shunt pipe and the second shunt pipe are respectively arranged at both ends of the air flow pipe.

[0004] The above-mentioned disclosed patent still has the following technical defects: it is only applicable to the inflation protection work of straight pipes and is not applicable to bent pipes. Placing the protection device in a bent pipe makes it impossible to take out after welding. Summary of the Utility Model

[0005] The purpose of the utility model is to propose a pipeline welding protection device for the problems existing in the background art.

[0006] The technical solution of the utility model, a pipeline welding protection device, includes:

[0007] Two spherical airbags, with a connecting line fixed between the two spherical airbags;

[0008] An argon gas delivery pipe for delivering argon gas between the two spherical airbags;

[0009] Two gas delivery pipes respectively communicated with the two spherical airbags;

[0010] An inflation device for inflating the inside of the gas delivery pipe;

[0011] Two iron blocks for connecting to the ends of the gas delivery pipes;

[0012] A magnet for attracting the iron blocks to move;

[0013] Two fixing mechanisms for respectively limiting two gas transmission pipes.

[0014] Preferably, the fixing mechanism includes two groups of connecting frame assemblies. The connecting frame assembly includes a semi-circular ring, transverse rods connected to both ends of the semi-circular ring, and a longitudinal rod vertically connected to the middle of the transverse rod. Tightening plates are slidably mounted on both longitudinal rods. A first elastic reset assembly is connected to the tightening plates. Two connecting sliders are slidably mounted on one transverse rod. Wedge-shaped blocks are connected to the ends of the two connecting sliders. A second elastic reset assembly is connected between the connecting slider and the transverse rod. Two limit holes are provided on the other transverse rod. Arc-shaped clamping plates are provided in the middle of both transverse rods.

[0015] Preferably, the first elastic reset assembly includes a first sliding rod and a first spring. A second sliding hole is provided on the longitudinal rod. The first sliding rod is disposed in the second sliding hole. The tightening plate is slidably arranged on the first sliding rod. The first spring is sleeved and installed on the first sliding rod.

[0016] Preferably, the second elastic reset assembly includes a second sliding rod and a second spring. Two first sliding holes are provided on the transverse rod. The second sliding rod is disposed in the corresponding first sliding hole on one side. The connecting slider is slidably arranged on the second sliding rod. The second spring is sleeved and installed on the second sliding rod.

[0017] Preferably, the inflation device includes an inflation airbag. An air outlet pipe and an air inlet pipe are communicated with the inflation airbag. A first one-way valve and a second one-way valve are respectively installed on the air outlet pipe and the air inlet pipe. The end of the air outlet pipe is connected with an externally threaded connecting pipe. The outer end of the gas transmission pipe is connected with an internally threaded connecting pipe that is threadedly connected to the externally threaded connecting pipe.

[0018] Preferably, a screw rod threadedly connected to the internally threaded connecting pipe is connected to the iron block.

[0019] Preferably, the argon gas transmission pipe passes through the spherical airbag on one side and its output end is placed between the two spherical airbags.

[0020] Compared with the prior art, the utility model has the following beneficial technical effects: The technical solution has a simple structure, small argon consumption, can be applicable to the sealing work of pipes with various diameters, and is convenient to take out the device from the inside of the pipe, and is applicable to the inflation protection work of straight pipes and bent pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the utility model.

[0022] Figure 2 It is a schematic structural diagram of the fixing mechanism in the utility model.

[0023] Figure 3 It is Figure 2 The partial enlarged structural diagram at A of

[0024] Reference numerals: 1, spherical airbag; 2, argon delivery pipe; 3, gas delivery pipe; 4, inflatable airbag; 41, air outlet pipe; 42, air inlet pipe; 5, magnet; 6, iron block; 7, internally threaded connecting pipe; 81, externally threaded connecting pipe; 82, screw; 91, first one-way valve; 92, second one-way valve; 10, connecting wire; 11, semi-circular ring; 111, transverse rod; 1111, limiting hole; 1112, first sliding hole; 112, longitudinal rod; 1121, second sliding hole; 12, pressing plate; 13, arc-shaped clamping plate; 141, first sliding rod; 142, first spring; 15, connecting slider; 16, wedge block; 171, second sliding rod; 172, second spring. Detailed implementation manners

[0025] Embodiment 1

[0026] As Figure 1 shown, a pipeline welding protection device proposed in this embodiment includes an argon delivery pipe 2, two gas delivery pipes 3, a magnet 5, an inflation device, two spherical airbags 1, two iron blocks 6, and two fixing mechanisms.

[0027] A connecting wire 10 is fixed between the two spherical airbags 1; the argon delivery pipe 2 is used to deliver argon between the two spherical airbags 1, and the argon delivery pipe 2 passes through one of the spherical airbags 1 and its output end is placed between the two spherical airbags 1; the two gas delivery pipes 3 are respectively communicated with the two spherical airbags 1; the inflation device is used to inflate the inside of the gas delivery pipe 3, and the inflation device includes an inflatable airbag 4. An air outlet pipe 41 and an air inlet pipe 42 are communicated on the inflatable airbag 4. A first one-way valve 91 and a second one-way valve 92 are respectively installed on the air outlet pipe 41 and the air inlet pipe 42. The end of the air outlet pipe 41 is connected with an externally threaded connecting pipe 81, and the outer end of the gas delivery pipe 3 is connected with an internally threaded connecting pipe 7 that is threadedly connected with the externally threaded connecting pipe 81; the iron block 6 is used to connect with the end of the gas delivery pipe 3, and a screw 82 that is threadedly connected with the internally threaded connecting pipe 7 is connected to the iron block 6; the magnet 5 is used to attract the iron block 6 to move; the two fixing mechanisms are respectively used to limit the two gas delivery pipes 3.

[0028] In this embodiment, before welding two pipes, first connect two iron blocks 6 to the outer ends of two gas transmission pipes 3 respectively, tie the end of the argon delivery pipe 2 to the corresponding side of the gas transmission pipe 3, insert the two iron blocks 6 into the inner sides of the two pipes, guide the two iron blocks 6 respectively through the magnets 5 so that the two iron blocks 6 are moved out from the inner sides of the two pipes respectively, then bring the two pipes closer and place the two spherical air bags 1 in the two pipes respectively, and then inflate the spherical air bags 1. First, disassemble the iron blocks 6, then connect the external thread connecting pipe 81 to the internal thread connecting pipe 7, and inflate the inside of the gas transmission pipe 3 by repeatedly pressing the inflation air bag 4. The gas enters the inside of the spherical air bag 1 to make the spherical air bag 1 bulge until the spherical air bag 1 tightly abuts against the inner wall of the pipe. Finally, connect one end of the argon delivery pipe 2 to the output end of the argon tank, and the argon enters the welding position between the two spherical air bags 1 through the argon delivery pipe 2, and argon can be filled into the inside of the spherical air bag 1 to reduce the oxygen content and prevent the weld metal from being oxidized. After the work is completed, disassemble the external thread connecting pipe 81 from the internal thread connecting pipe 7. At this time, the gas inside the spherical air bag 1 runs out, resulting in a rapid reduction in the volume of the spherical air bag 1. Subsequently, the spherical air bag 1 can be pulled out of the pipe by pulling the gas transmission pipe 3.

[0029] Embodiment Two

[0030] As Figure 2 and Figure 3 shown, a pipe welding protection device proposed in this embodiment, compared with Embodiment One, in this embodiment, the fixing mechanism includes two sets of connecting frame components. The connecting frame component includes a semi-circular ring 11, a transverse rod 111 connected to both ends of the semi-circular ring 11, and a longitudinal rod 112 vertically connected to the middle of the transverse rod 111. A pressing plate 12 is slidably installed on both longitudinal rods 112, and a first elastic reset component is connected to the pressing plate 12. The first elastic reset component includes a first sliding rod 141 and a first spring 142. A second sliding hole 1121 is opened on the longitudinal rod 112, the first sliding rod 141 is arranged in the second sliding hole 1121, the pressing plate 12 is slidably arranged on the first sliding rod 141, and the first spring 142 is sleeved on the first sliding rod 141. Two connecting sliders 15 are slidably installed on one transverse rod 111, and wedge-shaped blocks 16 are connected to the ends of the two connecting sliders 15. A second elastic reset component is connected between the connecting slider 15 and the transverse rod 111. The second elastic reset component includes a second sliding rod 171 and a second spring 172. Two first sliding holes 1112 are opened on the transverse rod 111, the second sliding rod 171 is arranged in the corresponding first sliding hole 1112, the connecting slider 15 is slidably arranged on the second sliding rod 171, and the second spring 172 is sleeved on the second sliding rod 171. Two limiting holes 1111 are opened on the other transverse rod 111, and arc-shaped clamping plates 13 are arranged in the middle of the two transverse rods 111.

[0031] In this embodiment, when fixing the gas transmission pipe 3, press the two abutting plates 12 closer so that the abutting plates 12 are placed inside the pipe. Then release the abutting plates 12, and under the elastic force of the first spring 142, drive the abutting plates 12 to abut against the inner wall of the pipe. Then place the gas transmission pipe 3 between the two arc-shaped clamping plates 13 and press it tightly. At this time, the wedge-shaped block 16 is inserted into the inside of the limit hole 1111 to complete the fixed connection of the two sets of connecting frame components, thereby realizing the fixing of the gas transmission pipe 3. Then fix the gas transmission pipe 3 on the other side according to the above method. Through the above settings, the spherical airbag 1 can be prevented from moving.

[0032] The above has described in detail the embodiments of the present invention in conjunction with the accompanying drawings. However, the present invention is not limited thereto. Within the scope of knowledge possessed by those skilled in the art to which the present invention pertains, various changes can be made without departing from the gist of the present invention.

Claims

1. A pipeline welding protection device, characterized in that, Including: Two spherical air bags (1), with a connecting line (10) fixed between the two spherical air bags (1); An argon gas delivery pipe (2) for delivering argon gas between the two spherical air bags (1); Two gas delivery pipes (3) respectively communicating with the two spherical air bags (1); An inflation device for inflating the inside of the gas delivery pipe (3); Two iron blocks (6) for connecting to the ends of the gas delivery pipes (3); A magnet (5) for attracting the iron blocks (6) to move; Two fixing mechanisms for respectively limiting the two gas delivery pipes (3).

2. The pipeline welding protection device according to claim 1, characterized in that, The fixing mechanism includes two sets of connecting frame components. The connecting frame component includes a semi-circular ring (11), a transverse rod (111) connected to both ends of the semi-circular ring (11), and a longitudinal rod (112) vertically connected to the middle of the transverse rod (111). A pressing plate (12) is slidably installed on both longitudinal rods (112). A first elastic reset component is connected to the pressing plate (12). Two connecting sliders (15) are slidably installed on one transverse rod (111). Wedge-shaped blocks (16) are connected to the ends of the two connecting sliders (15). A second elastic reset component is connected between the connecting slider (15) and the transverse rod (111). Two limiting holes (1111) are provided on the other transverse rod (111). Arc-shaped clamping plates (13) are provided in the middle of both transverse rods (111).

3. The pipeline welding protection device according to claim 2, characterized in that, The first elastic reset component includes a first sliding rod (141) and a first spring (142). A second sliding hole (1121) is provided on the longitudinal rod (112). The first sliding rod (141) is arranged in the second sliding hole (1121). The pressing plate (12) is slidably arranged on the first sliding rod (141). The first spring (142) is sleeved and installed on the first sliding rod (141).

4. A pipeline welding protection device according to claim 2, characterized in that, The second elastic reset component includes a second sliding rod (171) and a second spring (172). Two first sliding holes (1112) are provided on the transverse rod (111). The second sliding rod (171) is arranged in the corresponding first sliding hole (1112). The connecting slider (15) is slidably arranged on the second sliding rod (171). The second spring (172) is sleeved and installed on the second sliding rod (171).

5. A pipeline welding protection device according to claim 1, characterized in that, The inflation device includes an inflation air bag (4). An air outlet pipe (41) and an air inlet pipe (42) are communicated with the inflation air bag (4). A first one-way valve (91) and a second one-way valve (92) are respectively installed on the air outlet pipe (41) and the air inlet pipe (42). The end of the air outlet pipe (41) is connected with an externally threaded connecting pipe (81). The outer end of the gas delivery pipe (3) is connected with an internally threaded connecting pipe (7) threadedly connected to the externally threaded connecting pipe (81).

6. The pipeline welding protection device according to claim 5, characterized in that, A screw rod (82) threadedly connected to the internally threaded connecting pipe (7) is connected to the iron block (6).

7. A pipeline welding protection device according to claim 1, characterized in that, The argon gas delivery pipe (2) passes through one side of the spherical air bag (1) and its output end is placed between the two spherical air bags (1).

Images