Pipeline welding end socket device

Abstract

The invention provides a pipeline welding end socket device. The pipeline welding end socket device comprises an air inlet end shaft head, an air blocking end shaft head, a first limiting mechanism and a second limiting mechanism. The first limiting mechanism and the second limiting mechanism are both of body diameter adjustable structures, are arranged in inner cavities of the first pipeline and the second pipeline correspondingly and abut against the inner walls of the first pipeline and the second pipeline correspondingly. An air chamber is formed between the limiting mechanism I and the limiting mechanism II; the air blocking end shaft head is arranged in an inner cavity of the pipeline I and is connected with the limiting mechanism I; the air inlet end shaft head is provided with an air pipe, the air inlet end shaft head is arranged in an inner cavity of the second pipeline and connected with the second limiting mechanism, and the air pipe penetrates through the second limiting mechanism, enters the air chamber and is detachably connected with the air blocking end shaft head. The butt-joint welded junction of the first pipeline and the second pipeline is located in the air chamber. The pipeline butt welding device is simple in structure, convenient to use and suitable for welding machining of pipelines with various pipe diameters, universality and practicability can be greatly improved, and the machining cost of butt welding of the pipelines can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline welding, and more specifically to a pipeline welding head device. Background Art

[0002] In the process of butt welding of large-diameter stainless steel pipes, since oxygen, nitrogen and hydrogen have adverse effects on the arc and the molten pool, the butt weld of the pipe must be filled with argon to isolate the air and take anti-oxidation protection measures. The current method is to seal the two ends of the pipe with the plugging plate of the head device, and then fill the entire closed cavity of the pipe with inert gas such as argon protective gas to prevent oxidation at the root of the weld of the butt weld of the pipe and produce defects such as pores.

[0003] However, this plugging method has the following defects: the existing plugging plate has a fixed size and can only be used for a single pipe diameter, that is, it can only be used as a plugging plate for two pipes of a pipe diameter. The plugging plate needs to be replaced for different pipe diameters, which not only leads to low versatility and low practicality, but also greatly increases the cost of butt welding of pipelines. In addition, the gas filling components of the existing head device are complicated, and the joint structure of the gas filling components and the plugging plate is complicated, which further increases the welding cost of the pipeline. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies in the prior art and to provide a pipeline welding head device, which has a simple structure, is easy to use, and can be applied to the welding processing of pipelines of various diameters, which can not only greatly improve the versatility and practicality, but also reduce the processing cost of butt welding of pipelines.

[0005] In order to achieve the above-mentioned object, the present invention is implemented by the following technical scheme: a pipeline welding head device, characterized in that: it is arranged in the inner cavity of pipeline one and pipeline two; the pipeline welding head device comprises an air inlet end shaft head, a gas blocking end shaft head, a limiting mechanism one and a limiting mechanism two; the limiting mechanism one and the limiting mechanism two are both adjustable body diameter structures, the limiting mechanism one and the limiting mechanism two are respectively arranged in the inner cavity of pipeline one and pipeline two and respectively abut against the inner wall of pipeline one and pipeline two; an air chamber is formed between the limiting mechanism one and the limiting mechanism two; The blocking end shaft head is arranged in the inner cavity of pipeline one and is connected to the limiting mechanism one; the air inlet end shaft head is provided with an air pipe, the air inlet end shaft head is arranged in the inner cavity of pipeline two and is connected to the limiting mechanism two, the air pipe passes through the limiting mechanism two into the air chamber and is detachably connected to the blocking end shaft head; the air pipe is connected to the air chamber, and the butt weld of pipeline one and pipeline two is located in the air chamber; during operation, the external protective gas enters from the air inlet end shaft head to the air pipe, and then enters the air chamber, so that the protective gas is filled into the inner cavity at the butt weld of pipeline one and pipeline two.

[0006] In the above scheme, an air chamber can be formed between the limiting mechanism 1 and the limiting mechanism 2 of the present invention, and the limiting mechanism 1 and the limiting mechanism 2 are adjustable body diameter structures, so that the pipeline welding head device can be applied to the welding processing of pipelines with various diameters, which can not only greatly improve the versatility and practicality, but also reduce the processing cost of butt welding of pipelines. In addition, the pipeline welding head device of the present invention has a simple structure and is easy to use. The shaft head at the air inlet end can be connected to an external air inlet device, and the protective gas of the air inlet device can enter the air pipe from the shaft head at the air inlet end, and then enter the air chamber, so that the protective gas can be filled into the butt welding joint of pipeline 1 and pipeline 2 for welding processing, thereby greatly improving the efficiency of welding processing.

[0007] The pipeline welding sealing device also includes an air intake buffer head, which is arranged in the second inner cavity of the pipeline and is detachably connected to the air pipe; the air intake buffer head is communicated with the air pipe and the air chamber respectively.

[0008] The air pipe is provided with a plurality of air outlet holes 1, and the plurality of air outlet holes 1 are arranged circumferentially along the outer wall of the air pipe; the air inlet buffer head is provided with a cavity and a plurality of air outlet holes 2, and the plurality of air outlet holes 2 are evenly arranged on the end surface of the air inlet buffer head facing the air chamber, and the plurality of air outlet holes 2 are evenly surrounded in a circle; the air pipe is connected with the cavity of the air inlet buffer head through the air outlet hole 1, and the cavity is connected with the air chamber through the air outlet hole 2; the end surface of the air inlet buffer head facing the air chamber is located on the side of the butt weld of pipe 1 and pipe 2.

[0009] The air inlet buffer head of the present invention can evenly fill the protective gas into the butt weld of pipe 1 and pipe 2 in the air chamber. Since the plurality of air outlet holes 2 are evenly arranged in a circle, the butt weld of pipe 1 and pipe 2 is provided with protective gas, thereby improving the quality of welding processing.

[0010] The air pipe is detachably connected to the gas blocking end shaft head to form a blind end. This design allows all the inlet protective gas to flow out from the gas outlet hole.

[0011] The limiting mechanism 1 and the limiting mechanism 2 have the same structure, both comprising a fixed disk, a rotating disk, a plurality of push rods and a plurality of fins; the number of the push rods is equal to the number of fins, one end of the plurality of push rods is respectively connected to the rotating disk, and the other end is respectively connected to the plurality of fins; the plurality of fins are located on the inner side of the fixed disk, the plurality of fins are surrounded to form a circular shape, and serve as a limiting disk abutting against the inner wall of the pipe 1 or the pipe 2; when working, the rotating disk rotates and pushes each fin to move simultaneously through the push rods, so as to realize that the radius of the limiting disk formed by the fins is adjustable.

[0012] The limiting mechanism 1 and the limiting mechanism 2 of the present invention do not need to be replaced according to the diameter of the pipe 1 and the pipe 2. The radius of the limiting disk can be adjusted by directly rotating the rotating disk of the limiting mechanism 1 and the limiting mechanism 2, so that the limiting disk is against the inner wall of the pipe 1 or the pipe 2 with different diameters to achieve a blocking effect. This method is easy to operate, not only can greatly improve the versatility and practicality, but also can reduce the processing cost of the butt welding of the pipe 1 and the pipe 2.

[0013] The fixed disk is provided with a first support hole, and the rotating disk is provided with a second support hole; the pipeline welding head device is also provided with a flat key; the first support hole is provided with a flat key slot, and the flat key is arranged in the flat key slot; The gas blocking end shaft head passes through the support hole 1 and the support hole 2 of the limiting mechanism 1 to achieve connection with the limiting mechanism 1; the pipeline welding head device also includes a locking nut, which is detachably connected to the gas blocking end shaft head and is located outside the turntable of the limiting mechanism 1 to lock the turntable of the limiting mechanism 1.

[0014] The present invention uses a flat key to tightly connect the fixed disk of the limiting mechanism 1 to the air blocking end shaft head, and the locking nut locks the rotating disk to prevent the rotating disk of the limiting mechanism 1 from rotating during operation to cause the radius of the limiting disk formed by the fins to change.

[0015] The air pipe of the air inlet end shaft head passes through the support hole 1 and the support hole 2 of the limiting mechanism 2, and the air inlet end shaft head abuts against the rotating disk of the limiting mechanism 2 to lock the rotating disk of the limiting mechanism 2.

[0016] The present invention uses a flat key to tightly connect the fixed disk of the second limiting mechanism with the air pipe of the air inlet end shaft head. The air inlet end shaft head has a locking effect on the rotating disk to prevent the rotating disk of the second limiting mechanism from rotating during operation to cause the radius of the limiting disk formed by the fins to change.

[0017] The inner side of the fixed plate is provided with a guide member for facilitating the movement of each fin; the guide member is provided with a plurality of guide grooves, the number of which is equal to the number of fins, and each fin is located in a corresponding guide groove; when working, the fin moves along the edge of the guide groove. The guide groove can achieve the stability of the movement trajectory of the fin.

[0018] Each fin comprises a body and a butt joint; the butt joint is connected to the body; the plurality of fins are connected to form a circular shape, which means that among the plurality of fins, the butt joints of adjacent fins are butt jointed, and the plurality of fins form a circular shape.

[0019] One end of the butt joint of each fin is provided with a notch, and the other end is provided with a protrusion, and the protrusion matches and butts with the notch; the butt joint of adjacent fins means that each fin is butt jointed with the notch of an adjacent fin on one side through the protrusion, and with the protrusion of an adjacent fin on the other side through the notch, so as to achieve butt joint of the butt joints of adjacent fins.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects: the pipeline welding head device of the present invention has a simple structure, is easy to use, and can be applied to the welding processing of pipelines of various diameters, which can not only greatly improve the versatility and practicality, but also reduce the processing cost of butt welding of pipelines. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The schematic diagram of the pipeline welding head device of the present invention is Figure 1 ; Figure 2 The schematic diagram of the pipeline welding head device of the present invention is Figure 2 ; Figure 3 It is a schematic diagram of the pipeline welding head device of the present invention in the inner cavity of pipeline one and pipeline two; Figure 4 The schematic diagram of the limiting mechanism 1 or the limiting mechanism 2 in the pipeline welding head device of the present invention is Figure 1 ; Figure 5 The schematic diagram of the limiting mechanism 1 or the limiting mechanism 2 in the pipeline welding head device of the present invention is Figure 2 ; Figure 6 It is a schematic diagram of a fixed disk in the limiting mechanism 1 or the limiting mechanism 2 of the present invention; Figure 7 The internal schematic diagram of the limiting mechanism 1 or the limiting mechanism 2 of the present invention is Figure 1 ; Figure 8 The internal schematic diagram of the limiting mechanism 1 or the limiting mechanism 2 of the present invention is Figure 2 ; Among them, 1 is pipe 1, 2 is pipe 2, 3 is the shaft head at the air inlet end, 4 is the shaft head at the air blocking end, 5 is the limit mechanism 1, 6 is the limit mechanism 2, 7 is the air pipe, 7.1 is the air outlet hole 1, 8 is the butt weld, 9 is the air inlet buffer head, 9.1 is the cavity, 9.2 is the air outlet hole 2, 11 is the fixed plate, 11.1 is the support hole 1, 11.2 is the flat key groove, 12 is the turntable, 12.1 is the support hole 2, 13 is the fin, 13.1 is the body, 13.2 is the notch position, 13.3 is the protruding position, 14 is the push rod, 15 is the locking nut, 16 is the flat key, 17 is the guide piece, and 17.1 is the guide groove. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Example

[0023] like Figures 1 to 8As shown, the pipeline welding head device of the present invention is arranged in the inner cavity of pipeline 1 and pipeline 2, and the pipeline welding head device includes an air inlet end shaft head 3, a gas blocking end shaft head 4, a limiting mechanism 1 5 and a limiting mechanism 2 6, wherein the limiting mechanism 1 5 and the limiting mechanism 2 6 are both adjustable body diameter structures, the limiting mechanism 1 5 and the limiting mechanism 2 6 are respectively arranged in the inner cavity of pipeline 1 and pipeline 2 and respectively abut against the inner wall of pipeline 1 and pipeline 2, and an air chamber is formed between the limiting mechanism 1 5 and the limiting mechanism 2 6.

[0024] The blocking end shaft head 4 is arranged in the inner cavity of pipeline 1 and connected with the limiting mechanism 1 5, the inlet end shaft head 3 is provided with an air pipe 7, the inlet end shaft head 3 is arranged in the inner cavity of pipeline 2 2 and connected with the limiting mechanism 2 6, the air pipe 7 passes through the limiting mechanism 2 6 into the air chamber and is detachably connected with the blocking end shaft head 4 to form a blind end, the air pipe 7 is connected with the air chamber, and the butt weld 8 of pipeline 1 and pipeline 2 2 is located in the air chamber; during operation, the external protective gas enters from the inlet end shaft head 3 to the air pipe 7, and then enters the air chamber, so that the protective gas is filled into the inner cavity of the butt weld 8 of pipeline 1 and pipeline 2 2.

[0025] The pipeline welding head device of the present invention also includes an air intake buffer head 9, which is arranged in the inner cavity of the pipeline 2 and is detachably connected to the air pipe 7, and the air intake buffer head 9 is connected to the air pipe 7 and the air chamber respectively. Specifically, the air pipe 7 is provided with a plurality of air outlet holes 1 7.1, and the plurality of air outlet holes 1 7.1 are arranged circumferentially along the outer wall of the air pipe 7; the air intake buffer head 9 is provided with a cavity 9.1 and a plurality of air outlet holes 2 9.2, and the plurality of air outlet holes 2 9.2 are evenly arranged on the end surface of the air intake buffer head 9 facing the air chamber, and the plurality of air outlet holes 2 9.2 are evenly surrounded in a circle. The air pipe 7 is connected with the cavity 9.1 of the air intake buffer head 9 through the air outlet hole 1 7.1, and the cavity 9.1 is connected with the air chamber through the air outlet hole 2 9.2. The end surface of the air intake buffer head 9 facing the air chamber is located on the side of the butt weld 8 of the pipeline 1 and the pipeline 2. The air inlet buffer head 9 of the present invention can evenly fill the protective gas into the butt weld 8 of pipe 1 and pipe 2 in the air chamber. Since the plurality of air outlet holes 9.2 are evenly arranged in a circle, the butt weld 8 of pipe 1 and pipe 2 is provided with protective gas, thereby improving the quality of the welding process.

[0026] The limiting mechanism 1 5 and the limiting mechanism 2 6 of the present invention have the same structure, and both include a fixed disk 11, a rotating disk 12, a plurality of push rods 14 and a plurality of fins 13, wherein the number of the push rods 14 is equal to the number of the fins 13, one end of the plurality of push rods 14 is respectively connected to the rotating disk 12, and the other end is respectively connected to the plurality of fins 13; the plurality of fins 13 are located on the inner side of the fixed disk 11, the plurality of fins 13 are surrounded to form a circular shape, and serve as a limiting disk abutting against the inner wall of the pipe 1 or the pipe 2; when working, the rotating disk 12 rotates and pushes each fin 13 to move simultaneously through the push rods 14, so that the radius of the limiting disk formed by the fins 13 is adjustable.

[0027] The fixed disk 11 of the present invention is provided with a support hole 11.1, and the rotating disk 12 is provided with a support hole 12.1. The pipeline welding head device is also provided with a flat key 16 and a locking nut 15. The support hole 11.1 is provided with a flat key slot 11.2, and the flat key 16 is arranged in the flat key slot 11.2. The gas blocking end shaft head 4 passes through the support hole 11.1 and the support hole 2 12.1 of the limiting mechanism 1 5 to achieve connection with the limiting mechanism 1 5. The locking nut 15 is detachably connected to the gas blocking end shaft head 4 and is located on the outside of the rotating disk 12 of the limiting mechanism 1 5 to achieve locking of the rotating disk 12 of the limiting mechanism 1 5. The air pipe 7 of the air inlet end shaft head 3 passes through the support hole 11.1 and the support hole 2 12.1 of the limiting mechanism 2 6, and the air inlet end shaft head 3 abuts against the rotating disk 12 of the limiting mechanism 2 6 to achieve locking of the rotating disk 12 of the limiting mechanism 2 6.

[0028] The present invention uses a flat key 16 to tightly connect the fixed disk 11 of the limiting mechanism 1 5 with the air blocking end shaft head 4. The locking nut 15 locks the rotating disk 12 to prevent the rotating disk 12 of the limiting mechanism 1 5 from rotating during operation to cause the radius of the limiting disk formed by the fins 13 to change. Similarly, the present invention uses a flat key 16 to tightly connect the fixed disk 11 of the limiting mechanism 2 6 with the air pipe 7 of the air inlet end shaft head 3. At the same time, the air inlet end shaft head 3 has a locking effect on the rotating disk 12 to prevent the rotating disk 12 of the limiting mechanism 2 6 from rotating during operation to cause the radius of the limiting disk formed by the fins 13 to change.

[0029] The inner side of the fixed plate 11 of the present invention is provided with a guide member 17 for facilitating the movement of each fin 13. The guide member 17 is provided with a plurality of guide grooves 17.1, the number of which is equal to the number of the fins 13, and each fin 13 is located in a corresponding guide groove 17.1; during operation, the fin 13 moves along the edge of the guide groove 17.1. The guide groove 17.1 can achieve the stability of the movement trajectory of the fin 13.

[0030] In addition, each fin 13 includes a main body 13.1 and a docking portion, which is connected to the main body 13.1, wherein a plurality of fins 13 are connected to form a circular shape, which means that: a notch 13.2 is provided at one end of the docking portion of each fin 13, and a protruding position 13.3 is provided at the other end, and the protruding position 13.3 is matched and docked with the notch 13.2; among the plurality of fins 13, each fin 13 is docked with the notch 13.2 of the adjacent fin 13 on one side through the protruding position 13.3, and is docked with the protruding position 13.3 of the adjacent fin 13 on the other side through the notch 13.2, so that the docking portions of adjacent fins 13 are docked, and a plurality of fins 13 are surrounded in a circular shape.

[0031] An air chamber can be formed between the limiting mechanism 1 5 and the limiting mechanism 2 6 of the present invention, and the limiting mechanism 1 5 and the limiting mechanism 2 6 are adjustable body diameter structures, so that the pipeline welding head device can be applied to the welding processing of pipelines with various diameters, which can not only greatly improve the versatility and practicality, but also reduce the processing cost of the butt welding of pipelines. In addition, the pipeline welding head device of the present invention has a simple structure and is easy to use. The air inlet end shaft head 3 can be connected to the external air inlet equipment, and the protective gas of the air inlet equipment can enter the air pipe 7 from the air inlet end shaft head 3 and then enter the air chamber, so that the protective gas can be filled into the butt welding joint 8 of the pipeline 1 and the pipeline 2 for welding processing, thereby greatly improving the efficiency of the welding processing.

[0032] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A pipeline welding head device, characterized in that: Set in the inner cavity of pipeline 1 and pipeline 2; the pipeline welding head device includes an air inlet end shaft head, a gas blocking end shaft head, a limiting mechanism 1 and a limiting mechanism 2; the limiting mechanism 1 and the limiting mechanism 2 are both adjustable body diameter structures, the limiting mechanism 1 and the limiting mechanism 2 are respectively set in the inner cavity of pipeline 1 and pipeline 2 and respectively abut against the inner wall of pipeline 1 and pipeline 2; an air chamber is formed between the limiting mechanism 1 and the limiting mechanism 2; The blocking end shaft head is arranged in the inner cavity of pipeline one and is connected to the limiting mechanism one; the air inlet end shaft head is provided with an air pipe, the air inlet end shaft head is arranged in the inner cavity of pipeline two and is connected to the limiting mechanism two, the air pipe passes through the limiting mechanism two into the air chamber and is detachably connected to the blocking end shaft head; the air pipe is connected to the air chamber, and the butt weld of pipeline one and pipeline two is located in the air chamber; during operation, the external protective gas enters from the air inlet end shaft head to the air pipe, and then enters the air chamber, so that the protective gas is filled into the inner cavity at the butt weld of pipeline one and pipeline two.

2. The pipeline welding head device according to claim 1 is characterized in that: The pipeline welding sealing device also includes an air intake buffer head, which is arranged in the second inner cavity of the pipeline and is detachably connected to the air pipe; the air intake buffer head is communicated with the air pipe and the air chamber respectively.

3. The pipeline welding head device according to claim 2 is characterized in that: The air pipe is provided with a plurality of air outlet holes 1, and the plurality of air outlet holes 1 are arranged circumferentially along the outer wall of the air pipe; the air inlet buffer head is provided with a cavity and a plurality of air outlet holes 2, and the plurality of air outlet holes 2 are evenly arranged on the end surface of the air inlet buffer head facing the air chamber, and the plurality of air outlet holes 2 are evenly surrounded in a circle; the air pipe is connected with the cavity of the air inlet buffer head through the air outlet hole 1, and the cavity is connected with the air chamber through the air outlet hole 2; the end surface of the air inlet buffer head facing the air chamber is located on the side of the butt weld of pipe 1 and pipe 2.

4. The pipeline welding head device according to claim 1 is characterized in that: The air pipe is detachably connected to the air blocking end shaft head to form a blind end.

5. The pipeline welding head device according to claim 1 is characterized in that: The limiting mechanism 1 and the limiting mechanism 2 have the same structure, both comprising a fixed disk, a rotating disk, a plurality of push rods and a plurality of fins; the number of the push rods is equal to the number of fins, one end of the plurality of push rods is respectively connected to the rotating disk, and the other end is respectively connected to the plurality of fins; the plurality of fins are located on the inner side of the fixed disk, the plurality of fins are surrounded to form a circular shape, and serve as a limiting disk abutting against the inner wall of the pipe 1 or the pipe 2; when working, the rotating disk rotates and pushes each fin to move simultaneously through the push rods, so as to realize that the radius of the limiting disk formed by the fins is adjustable.

6. The pipeline welding head device according to claim 5 is characterized in that: The fixed disk is provided with a first support hole, and the rotating disk is provided with a second support hole; the pipeline welding head device is also provided with a flat key; the first support hole is provided with a flat key slot, and the flat key is arranged in the flat key slot; The gas blocking end shaft head passes through the support hole 1 and the support hole 2 of the limiting mechanism 1 to achieve connection with the limiting mechanism 1; the pipeline welding head device also includes a locking nut, which is detachably connected to the gas blocking end shaft head and is located outside the turntable of the limiting mechanism 1 to lock the turntable of the limiting mechanism 1.

7. The pipeline welding head device according to claim 6 is characterized in that: The air pipe of the air inlet end shaft head passes through the support hole 1 and the support hole 2 of the limiting mechanism 2, and the air inlet end shaft head abuts against the rotating disk of the limiting mechanism 2 to lock the rotating disk of the limiting mechanism 2.

8. The pipeline welding head device according to claim 5, characterized in that: The inner side of the fixed plate is provided with a guide member for facilitating the movement of each fin; the guide member is provided with a plurality of guide grooves, the number of which is equal to the number of fins, and each fin is located in a corresponding guide groove; when working, the fin moves along the edge of the guide groove.

9. The pipeline welding head device according to claim 5, characterized in that: Each fin comprises a body and a butt joint; the butt joint is connected to the body; the plurality of fins are connected to form a circular shape, which means that among the plurality of fins, the butt joints of adjacent fins are butt jointed, and the plurality of fins form a circular shape.

10. The pipeline welding head device according to claim 9, characterized in that: One end of the butt joint of each fin is provided with a notch, and the other end is provided with a protrusion, and the protrusion matches and butts with the notch; the butt joint of adjacent fins means that each fin is butt jointed with the notch of an adjacent fin on one side through the protrusion, and with the protrusion of an adjacent fin on the other side through the notch, so as to achieve butt joint of the butt joints of adjacent fins.

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