Multifunctional pipeline air plug device for pipeline welding

Abstract

The utility model relates to the technical field of pipeline welding, and discloses a multifunctional pipeline gas plug device for pipeline welding. The multifunctional pipeline air plug device for pipeline welding comprises an exhaust pipe, a connecting pipe is fixedly installed at the front end of the exhaust pipe, an air valve is fixedly installed on the front side of the connecting pipe, an air bag is fixedly installed at the rear end of the exhaust pipe, and a movable pipe is installed on the outer side of the exhaust pipe in a penetrating and inserting mode; a movable frame is fixedly installed at the rear end of the movable pipe, a transmission rod is movably installed at the upper end of the movable frame, a connecting shaft is fixedly installed in the transmission rod, the exhaust pipe is communicated with the air bag, and the air valve is communicated with the exhaust pipe through the connecting pipe, so that after pipeline modification is completed, the air valve is connected with an air pump and is opened, and then the air bag is opened. Air in the air bag is pumped out through the air pump, the air pressure in the air bag is reduced, the size of the air bag is reduced under the influence of the air pressure difference, and in this way, the air bag can be taken out after pipeline modification is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline welding, in particular to a multifunctional pipeline gas plug device used for pipeline welding. Background Art

[0002] When repairing or renovating oil and gas pipelines, it is often necessary to weld the pipelines. The residual oil and gas in the pipelines are flammable and explosive, so it is necessary to clean the residual oil and gas at the pipeline joints and seal the pipelines, so a pipeline sealing device is needed.

[0003] The existing referenceable Chinese utility model patent with announcement number: CN208169805U discloses a pipeline plugging device for welding oil and gas pipelines. The pipeline plugging device includes an exhaust pipe for discharging gas in the pipeline, the exhaust pipe is a hollow screw, the hollow screw is provided with an external thread, one end of the exhaust pipe is fixedly connected to a bottom plate, a pressure plate is sleeved on the exhaust pipe, the pressure plate is provided with a threaded hole adapted to the external thread of the hollow screw, or a threaded fastener for pushing the pressure plate is provided on the exhaust pipe, and a filler for radial deformation when subjected to axial pressure is provided between the bottom plate and the pressure plate. In this way, when the pipeline plugging device performs a plugging operation, the filler provided between the bottom plate and the pressure plate is radially deformed under the action of the bottom plate and the pressure plate, and the gap between the pipeline plugging device and the pipeline to be sealed is fully filled, the plugging effect is good, and the exhaust pipe can discharge the residual oil and gas in the pipeline to be sealed, so that the safety factor is high and the risk is low when welding the oil and gas pipeline.

[0004] Existing pipeline plugging devices generally use air bags to plug. During the pipeline welding process, welding slag may cause the surface of the air bag to melt and produce cracks, resulting in insufficient air pressure in the air bag, causing a gap between the air bag and the pipeline. The gas inside the pipeline will overflow from the gap, affecting construction safety. In addition, after the existing pipeline plugging equipment completes the welding of the valve, the air bag may not be able to pass through the valve conveniently, which is very inconvenient. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a multifunctional pipeline air plug device for pipeline welding, which has the advantages of preventing welding slag from contacting the air bag and being able to easily pass through the valve, thereby solving the above-mentioned technical problems.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multifunctional pipeline gas plug device for pipeline welding, comprising: an exhaust pipe, a connecting pipe is fixedly installed at the front end of the exhaust pipe, an air valve is fixedly installed at the front side of the connecting pipe, an air bag is fixedly installed at the rear end of the exhaust pipe, a movable pipe is inserted and installed on the outside of the exhaust pipe, a movable frame is fixedly installed at the rear end of the movable pipe, a transmission rod is movably installed on the upper end of the movable frame, a connecting shaft is fixedly installed inside the transmission rod, a fixing ring is fixedly installed on the outside of the exhaust pipe, a fixing block is fixedly installed on the outside of the fixing ring, a connecting rod is movably installed on the top of the fixing block, a fixing shaft is fixedly installed on the lower end of the connecting rod, a transmission plate is fixedly installed on the rear side of the connecting rod, hinges are fixedly installed on both sides of the transmission plate, and a movable plate is fixedly installed on the front side of the hinge; the connecting pipe can facilitate the connection between the exhaust pipe and the air valve.

[0009] As a preferred technical solution of the utility model, the exhaust pipe is connected to the airbag, and the air valve is connected to the exhaust pipe through a connecting pipe; the exhaust pipe can facilitate the inflation of the airbag.

[0010] As the preferred technical solution of the utility model, the movable tube and the exhaust pipe are slidably connected, the movable frame and the exhaust pipe are slidably connected, and the connecting shaft is symmetrically installed at the upper and lower ends of the transmission rod; the movable tube can drive the movable frame to move.

[0011] As an optimal technical solution of the utility model, the transmission rod is movably installed on the outside of the movable frame at an angle of ninety degrees with the center of the movable frame as a reference, the lower end of the transmission rod is rotatably connected to the movable frame through a connecting shaft, and the upper end of the transmission rod is rotatably connected to the upper end of the connecting rod through a connecting shaft; the transmission rod can drive the connecting rod to rotate.

[0012] As the preferred technical solution of the utility model, the fixed block is installed on the outside of the fixed ring in a "cross" shape with the center of the fixed ring as the reference, and the connecting rod is rotationally connected through the fixed shaft, the fixed block and the fixed ring; the fixed block can limit the lower end position of the connecting rod through the fixed shaft.

[0013] As a preferred technical solution of the utility model, the transmission plate and the movable plate are both fan-shaped structures, the area of ​​the transmission plate is smaller than the area of ​​the movable plate, the hinge is symmetrically installed on the left and right sides of the transmission plate with the center of the transmission plate as a reference, and the transmission plate and the movable plate are rotatably connected through the hinge; the hinge can facilitate the rotational connection between the transmission plate and the movable plate.

[0014] As a preferred technical solution of the utility model, the two movable plates are installed between the transmission plates as a group, the movable plates are connected by hinges, and the hinges connecting the movable plates are located on the front side of the movable plates; the movable plates can block welding slag.

[0015] Compared with the prior art, the utility model provides a multifunctional pipeline gas plug device for pipeline welding, which has the following beneficial effects:

[0016] 1. The utility model forms a sliding connection between the movable tube and the exhaust pipe, and a sliding connection between the movable frame and the exhaust pipe through the arrangement of the movable tube. After the airbag is inflated to fill the inside of the pipe, the movable frame is driven to move through the movable tube, so that the front end of the transmission rod movably installed on the outer side of the movable frame moves backward, and the angle between the transmission rod and the exhaust pipe will increase, so that the connecting rod rotates with the axis of the fixed shaft as a reference, so that the transmission plate rotates from an inclined state to a vertical state. Since the hinges are symmetrically installed on the left and right sides of the transmission plate with the center of the transmission plate as a reference, and the transmission plate and the movable plate are rotatably connected by the hinges, when the angle between the connecting rod and the exhaust pipe is ninety degrees, the transmission plate and the movable plate are in a circular expansion state, so as to block the welding slag when the pipeline is welded.

[0017] 2. The utility model is connected to the airbag through the setting of the exhaust pipe, and the air valve is connected to the exhaust pipe through the connecting pipe. After the modification of the pipeline is completed, the air valve is connected to the air pump, and the air valve is opened. The air inside the airbag is pumped out by the air pump to reduce the air pressure inside the airbag. The volume of the airbag will shrink under the influence of the air pressure difference. In this way, the airbag can be taken out after the modification of the pipeline is completed. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 This is a schematic diagram of the installation structure of the exhaust pipe and the airbag of the utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure between the movable tube and the fixed ring of the utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure between the transmission plate and the movable plate of the utility model;

[0022] Among them: 1. exhaust pipe; 11. connecting pipe; 12. air valve; 13. air bag; 14. movable pipe; 15. movable frame; 16. transmission rod; 17. connecting shaft; 18. fixing ring; 19. fixing block; 110. connecting rod; 111. fixed shaft; 112. transmission plate; 113. hinge; 114. movable plate. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0024] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1 - Figure 4 In the present embodiment, a multifunctional pipeline gas plug device for pipeline welding comprises: an exhaust pipe 1, a connecting pipe 11 is fixedly installed at the front end of the exhaust pipe 1, a gas valve 12 is fixedly installed at the front side of the connecting pipe 11, an air bag 13 is fixedly installed at the rear end of the exhaust pipe 1, a movable pipe 14 is inserted and installed on the outer side of the exhaust pipe 1, a movable frame 15 is fixedly installed at the rear end of the movable pipe 14, a transmission rod 16 is movably installed on the upper end of the movable frame 15, a connecting shaft 17 is fixedly installed inside the transmission rod 16, a fixing ring 18 is fixedly installed on the outer side of the exhaust pipe 1, a fixing block 19 is fixedly installed on the outer side of the fixing ring 18, a connecting rod 110 is movably installed above the fixing block 19, a fixing shaft 111 is fixedly installed at the lower end of the connecting rod 110, a transmission plate 112 is fixedly installed on the rear side of the connecting rod 110, hinges 113 are fixedly installed on both sides of the transmission plate 112, and a movable plate 114 is fixedly installed on the front side of the hinge 113.

[0027] The exhaust pipe 1 is communicated with the air bag 13 , and the air valve 12 is communicated with the exhaust pipe 1 through the connecting pipe 11 .

[0028] The movable pipe 14 is slidably connected to the exhaust pipe 1 , the movable frame 15 is slidably connected to the exhaust pipe 1 , and the connecting shaft 17 is symmetrically mounted on the upper and lower ends of the transmission rod 16 .

[0029] The transmission rod 16 is movably installed on the outer side of the movable frame 15 at an angle of ninety degrees with the center of the movable frame 15 as a reference. The lower end of the transmission rod 16 is rotatably connected to the movable frame 15 through the connecting shaft 17, and the upper end of the transmission rod 16 is rotatably connected to the upper end of the connecting rod 110 through the connecting shaft 17.

[0030] The fixing block 19 is installed on the outside of the fixing ring 18 in a "cross" shape with the center of the fixing ring 18 as a reference, and the connecting rod 110 is rotatably connected through the fixing shaft 111, the fixing block 19 and the fixing ring 18.

[0031] The transmission plate 112 and the movable plate 114 are both fan-shaped structures. The area of ​​the transmission plate 112 is smaller than that of the movable plate 114. The hinges 113 are symmetrically installed on the left and right sides of the transmission plate 112 with the center of the transmission plate 112 as the reference, and the transmission plate 112 and the movable plate 114 are rotatably connected through the hinges 113.

[0032] Two movable plates 114 are installed between the transmission plates 112 in a group. The movable plates 114 are connected by hinges 113 , and the hinges 113 connecting the movable plates 114 are located at the front side of the movable plates 114 .

[0033] Specifically, the exhaust pipe 1 can facilitate the inflation of the airbag 13, the connecting pipe 11 can facilitate the connection between the exhaust pipe 1 and the air valve 12, the air valve 12 can facilitate the maintenance of the internal air pressure of the airbag 13, the movable pipe 14 can drive the movable frame 15 to move, the movable frame 15 can drive the transmission rod 16 to move, the transmission rod 16 can drive the connecting rod 110 to rotate, the fixed ring 18 can limit the position of the fixed block 19, the fixed block 19 can limit the lower end position of the connecting rod 110 through the fixed shaft 111, the connecting rod 110 can drive the transmission plate 112 to rotate, the transmission plate 112 can block the welding slag, the hinge 113 can facilitate the rotation connection between the transmission plate 112 and the movable plate 114, and the movable plate 114 can block the welding slag.

[0034] When in use, since the movable tube 14 is slidably connected to the exhaust pipe 1, and the movable frame 15 is slidably connected to the exhaust pipe 1, after the airbag 13 is inflated and fills the inside of the pipe, the movable frame 15 is driven to move by the movable tube 14, so that the front end of the transmission rod 16 movably installed outside the movable frame 15 moves backward, and the angle between the transmission rod 16 and the exhaust pipe 1 will increase, so that the connecting rod 110 rotates with the axis of the fixed shaft 111 as the reference, so that the transmission plate 112 rotates from the inclined state to the vertical state. Since the hinge 113 is symmetrically installed on the left and right sides of the transmission plate 112 with the center of the transmission plate 112 as the reference, and the transmission plate 112 and the movable plate 114 are rotatably connected by the hinge 113, the angle between the connecting rod 110 and the exhaust pipe 1 is ninety degrees. When the angle between the transmission rod 16 and the exhaust pipe 1 is reduced, the transmission plate 112 and the movable plate 114 are retracted to facilitate the removal of the device from the pipe. At the same time, the exhaust pipe 1 is connected to the airbag 13, and the air valve 12 is connected to the exhaust pipe 1 through the connecting pipe 11. After the modification of the pipe is completed, the air valve 12 is connected to the air pump, and the air valve 12 is opened. The air in the airbag 13 is extracted by the air pump to reduce the air pressure in the airbag 13. The airbag 13 will shrink in size under the influence of the air pressure difference. In this way, the airbag 13 can be removed after the modification of the pipe is completed.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional pipeline gas plug device for pipeline welding, characterized in that: include: An exhaust pipe (1), wherein a connecting pipe (11) is fixedly mounted at the front end of the exhaust pipe (1), an air valve (12) is fixedly mounted at the front side of the connecting pipe (11), an air bag (13) is fixedly mounted at the rear end of the exhaust pipe (1), a movable pipe (14) is inserted and mounted on the outer side of the exhaust pipe (1), a movable frame (15) is fixedly mounted at the rear end of the movable pipe (14), a transmission rod (16) is movably mounted at the upper end of the movable frame (15), and a connecting shaft (17) is fixedly mounted inside the transmission rod (16), A fixing ring (18) is fixedly mounted on the outer side of the exhaust pipe (1), a fixing block (19) is fixedly mounted on the outer side of the fixing ring (18), a connecting rod (110) is movably mounted above the fixing block (19), a fixing shaft (111) is fixedly mounted on the lower end of the connecting rod (110), a transmission plate (112) is fixedly mounted on the rear side of the connecting rod (110), hinges (113) are fixedly mounted on both sides of the transmission plate (112), and a movable plate (114) is fixedly mounted on the front side of the hinge (113).

2. A multifunctional pipeline gas plug device for pipeline welding according to claim 1, characterized in that: The exhaust pipe (1) is in communication with the air bag (13), and the air valve (12) is in communication with the exhaust pipe (1) via a connecting pipe (11).

3. The multifunctional pipeline gas plug device for pipeline welding according to claim 1 is characterized in that: The movable pipe (14) is slidably connected to the exhaust pipe (1), the movable frame (15) is slidably connected to the exhaust pipe (1), and the connecting shaft (17) is symmetrically mounted on the upper and lower ends of the transmission rod (16).

4. The multifunctional pipeline gas plug device for pipeline welding according to claim 1 is characterized in that: The transmission rod (16) is movably mounted on the outer side of the movable frame (15) at an angle of ninety degrees with the center of the movable frame (15) as a reference, the lower end of the transmission rod (16) is rotatably connected to the movable frame (15) via a connecting shaft (17), and the upper end of the transmission rod (16) is rotatably connected to the upper end of the connecting rod (110) via the connecting shaft (17).

5. The multifunctional pipeline gas plug device for pipeline welding according to claim 1 is characterized in that: The fixing block (19) is installed on the outside of the fixing ring (18) in a "cross" shape with the center of the fixing ring (18) as a reference, and the connecting rod (110) is rotatably connected through the fixing shaft (111), the fixing block (19) and the fixing ring (18).

6. The multifunctional pipeline gas plug device for pipeline welding according to claim 1 is characterized in that: The transmission plate (112) and the movable plate (114) are both fan-shaped structures. The area of ​​the transmission plate (112) is smaller than that of the movable plate (114). The hinge (113) is symmetrically installed on the left and right sides of the transmission plate (112) with the center of the transmission plate (112) as a reference, and the transmission plate (112) and the movable plate (114) are rotatably connected via the hinge (113).

7. The multifunctional pipeline gas plug device for pipeline welding according to claim 1 is characterized in that: The movable plates (114) are mounted between the transmission plates (112) in a group of two. The movable plates (114) are connected by hinges (113), and the hinges (113) connecting the movable plates (114) are located at the front side of the movable plates (114).

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