Novel telescopic wire feeding mechanism for pipeline all-position TIG (Tungsten Inert Gas) automatic welding

Abstract

The invention relates to the technical field of pipeline welding, in particular to a novel telescopic wire feeding mechanism for pipeline all-position TIG automatic welding. The novel telescopic wire feeding mechanism for pipeline all-position TIG automatic welding comprises a telescopic mechanism and a welding wire rolling and feeding device, the welding wire rolling and feeding device is used for conveying welding wires penetrating through the welding wire rolling and feeding device, and the telescopic mechanism is connected with the welding wire rolling and feeding device and used for driving the welding wire rolling and feeding device to do reciprocating telescopic movement in the conveying direction of the welding wires. The wire feeding device has the advantages that the structural design is reasonable, the wire feeding device is matched with the TIG welding technology, the welding efficiency can be effectively improved, the all-position welding capacity is improved, and the welding quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline welding, and in particular to a novel telescopic wire feeding mechanism for pipeline all-position TIG automatic welding. Background Art

[0002] As an important part of national energy, the safe transportation and storage of oil and natural gas is a crucial premise and foundation for the development of national energy strategy, energy security and people's livelihood. In the oil and gas transportation system, long-distance pipelines play a vital role, and their construction quality is directly related to the safe operation of long-distance pipelines. Pipeline welding is a key process in the construction of long-distance oil and gas pipelines. The welding quality and welding efficiency have always been highly concerned by pipeline builders and operators, and have always been a research hotspot in the field of pipeline welding technology.

[0003] With the continuous growth of energy demand and the increasing scale of pipeline construction, the requirements for long-distance oil and gas pipeline welding technology are getting higher and higher. Among the many welding methods, TIG welding (tungsten inert gas shielded welding) has been used in the welding of long-distance oil and gas pipelines due to its high welding quality and beautiful weld formation. However, the existing TIG automatic welding technology and equipment still have many shortcomings in practical applications. The welding efficiency of the existing TIG automatic welding technology and equipment is low, and the welding speed is usually only 100mm / min-120mm / min. This seriously affects the construction progress in the large-scale long-distance oil and gas pipeline construction and cannot meet the needs of efficient production. The low welding efficiency not only increases the construction cost, but also may cause delays in the construction period and affect the smooth progress of the entire project. In addition, the existing TIG automatic welding technology performs poorly in terms of all-position welding capabilities. Due to the complex and diverse laying environment of long-distance oil and gas pipelines, the position and posture of the pipelines often change, and the welding equipment needs to have good all-position welding adaptability. However, the existing technology is difficult to ensure the stability and consistency of welding quality when facing different welding positions, and welding defects such as lack of penetration and lack of fusion are prone to occur, which brings potential risks to the safe operation of the pipeline.

[0004] In summary, in order to improve the welding quality and efficiency of long-distance oil and gas pipelines and ensure the safety and reliability of energy transportation, it is urgent to develop a new type of fast TIG welding wire feeding mechanism to overcome the limitations of existing technology and promote the development and progress of long-distance oil and gas pipeline welding technology. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a new telescopic wire feeding mechanism for pipeline all-position TIG automatic welding, which effectively overcomes the defects of the prior art.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] A new telescopic wire feeding mechanism for pipeline all-position TIG automatic welding comprises a telescopic mechanism and a welding wire rolling device, wherein the welding wire rolling device is used to convey the welding wire passing therethrough, and the telescopic mechanism is connected to the welding wire rolling device to drive the welding wire rolling device to reciprocate and telescopically move along the conveying direction of the welding wire.

[0008] Based on the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the telescopic mechanism is located upstream in the welding wire conveying direction.

[0010] Furthermore, it also includes two parallel guide rails, the welding wire rolling device is slidably mounted on the two guide rails, the telescopic mechanism is fixedly mounted on the two guide rails, and the telescopic mechanism is used to drive the welding wire rolling device to reciprocate and telescopically move along the guide rails.

[0011] Furthermore, both ends of the guide rail are mounted on the base through brackets respectively.

[0012] Furthermore, the welding wire rolling device includes a mounting plate, a driving gear, two pairs of follower gears and two pairs of rollers, the two pairs of follower gears are respectively assembled on one side of the mounting plate by rotating shafts, the two follower gears of each pair are meshed with each other, the driving gear is mounted on one side of the mounting plate by rotating shafts, and is located between two of the two pairs of follower gears, the driving gear is meshed with two of the two pairs of follower gears, the two pairs of rollers are respectively placed on the other side of the mounting plate, and are coaxially assembled with the rotating shafts of each follower gear respectively, the two rollers of each pair are close to each other, the two pairs of rollers are arranged at intervals, the welding wire passes through between each pair of two rollers in turn, the mounting plate is placed between the two guide rails, and its two ends are respectively slidably connected to the two guide rails, the telescopic mechanism is connected to one side of the mounting plate, and the other side of the mounting plate is provided with a first rotating drive device transmission connected to the rotating shaft of the driving gear.

[0013] Furthermore, the first rotation driving device is a motor.

[0014] Furthermore, two ends of the mounting plate are slidably connected to the guide rails via sliding sleeves.

[0015] Furthermore, coaxially distributed welding wire inlet duct and welding wire outlet duct are respectively provided on both side ends of the other side of the mounting plate, the pipe opening of the welding wire inlet duct is close to the gap between one pair of the rollers, and the pipe opening of the welding wire outlet duct is close to the gap between the other pair of the rollers.

[0016] Furthermore, the telescopic mechanism includes a base, an eccentric wheel, a connecting rod and a second rotation drive device. The base is placed between the two guide rails and is fixedly connected to the two guide rails. The eccentric wheel is rotatably mounted on one side of the base through a rotating shaft. The end face of the eccentric wheel is provided with a short shaft eccentrically arranged therewith. One end of the connecting rod is rotationally connected to the short shaft, and the other end of the connecting rod extends toward one side of the mounting plate and is pinned to an ear seat adapted to the side end of the mounting plate through a pin shaft. The second rotation drive device is mounted on the other side of the base and is transmission-connected to the rotating shaft of the eccentric wheel.

[0017] Furthermore, the second rotation driving device is a motor.

[0018] The beneficial effects of the present invention are: reasonable structural design, the wire feeding combined with TIG welding technology can effectively improve welding efficiency, improve the capability of all-position welding, and improve welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a novel telescopic wire feeding mechanism for pipeline all-position TIG automatic welding of the present invention;

[0020] Figure 2 It is an assembly diagram of the roller on the other side of the mounting plate in the novel telescopic wire feeding mechanism for pipeline all-position TIG automatic welding of the present invention;

[0021] Figure 3 This is a schematic diagram of the existing girth weld TIG structure.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. telescopic mechanism; 2. welding wire rolling device; 3. guide rail; 11. base; 12. eccentric wheel; 13. connecting rod; 21. mounting plate; 22. driving gear; 23. follower gear; 24. roller; 25. first rotary driving device; 211. welding wire inlet conduit; 212. welding wire outlet conduit. DETAILED DESCRIPTION

[0024] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0025] Example: Figure 1 and 2 As shown, the new telescopic wire feeding mechanism for pipeline all-position TIG automatic welding of this embodiment includes a telescopic mechanism 1 and a wire rolling device 2, wherein the wire rolling device 2 is used to convey the welding wire H passing therethrough, and the telescopic mechanism 1 is connected to the wire rolling device 2 to drive the wire rolling device 2 to reciprocate and telescopically move along the conveying direction of the welding wire.

[0026] The main function of the new telescopic wire feeding mechanism for pipeline all-position TIG automatic welding in this embodiment is to feed welding wire to the TIG welding equipment. The welding wire rolling device 2 realizes linear feeding of the welding wire. At the same time, the telescopic mechanism 1 realizes rapid telescoping along the feeding direction during the welding wire feeding process, generates a reciprocating telescopic vibration action, and then stirs the molten pool. The following three benefits can be obtained by stirring the molten pool:

[0027] First, the welding efficiency is high. The telescopic wire feeding mechanism of this embodiment can make the welding wire reciprocate into the molten pool. The stirring of the molten pool by the welding wire can destroy the surface tension of the molten pool, make the metal crystals more dense, and form a weld with better metallurgical and mechanical properties. At the same time, it can also make the welding wire melt faster, greatly improving the quality of welding.

[0028] Second, the welding quality is high. Stirring the molten pool can drive away the volatile gas and entrained bubbles in the molten pool, reduce the generation of pores, and greatly improve the welding quality.

[0029] Third, the all-position welding capability is strong. The kinetic energy of vibration can not only significantly reduce the heat input, but also improve the all-position welding capability, and is more suitable for all-position welding of long-distance oil and gas pipelines.

[0030] In this embodiment, the telescopic mechanism 1 is located upstream of the welding wire conveying direction. That is to say, the telescopic drive of the welding wire rolling device 2 is performed upstream, which will not interfere with the welding wire conveyed downstream, ensuring that the welding wire can be conveyed smoothly.

[0031] As a preferred embodiment, it also includes two parallel guide rails 3, the welding wire rolling device 2 is slidably mounted on the two guide rails 3, the telescopic mechanism 1 is fixedly mounted on the two guide rails 3, and the telescopic mechanism 1 is used to drive the welding wire rolling device 2 to move reciprocatingly and telescopically along the guide rails 3.

[0032] In the above implementation scheme, the conveying direction of the welding wire in the welding wire rolling device 2 is parallel to the guide rail 3. Then, the welding wire rolling device 2 is slidably mounted on the two guide rails 3, and then the telescopic mechanism 1 is driven to ensure that the welding wire rolling device 2 moves back and forth along the guide rail 3 (that is, the conveying direction of the welding wire), thereby generating a telescopic vibration effect, thereby achieving the above-mentioned technical purpose and effect. The design of the guide rail 3 ensures the direction of the telescopic vibration of the welding wire rolling device 2.

[0033] In this embodiment, the two ends of the guide rail 3 are respectively mounted on the base through brackets. The purpose of this design is to allow the guide rail 3 to be suspended on the base, providing sufficient installation space for the installation of the welding wire rolling device 2.

[0034] As a preferred embodiment, the welding wire rolling device 2 includes a mounting plate 21, a driving gear 22, two pairs of follower gears 23 and two pairs of rollers 24, the two pairs of follower gears 23 are respectively assembled on one side of the mounting plate 21 by rotating shafts, and the two follower gears 23 of each pair are meshed with each other, the driving gear 22 is mounted on one side of the mounting plate 21 by rotating shafts, and is located between two of the two pairs of follower gears 23, the driving gear 22 is meshed with two of the two pairs of follower gears 23, and the two pairs of rollers 24 are respectively It is placed on the other side of the mounting plate 21 and is coaxially assembled with the rotating shaft of each follower gear 23 in a one-to-one correspondence. Each pair of two rollers 24 are close to each other, and the two pairs of rollers 24 are arranged at intervals. The welding wire passes through each pair of two rollers 24 in turn. The mounting plate 21 is placed between the two guide rails 3, and its two ends are respectively slidably connected to the two guide rails 3. The telescopic mechanism 1 is connected to one side of the mounting plate 21, and the other side of the mounting plate 21 is provided with a first rotating drive device 25 that is transmission-connected to the rotating shaft of the driving gear 22.

[0035] In the above embodiment, the first rotation driving device 25 drives two of the two pairs of follower gears 23 to rotate, so that the two follower gears 23 of each pair can rotate. During the rotation process, the speeds of the two follower gears 23 of each pair are opposite. Figure 1 For example, the follower gear A rotates clockwise, the follower gear B also rotates clockwise, the follower gear C meshing with the follower gear A rotates counterclockwise, and the follower gear D meshing with the follower gear B rotates counterclockwise, so that the two rollers 24 of each pair also rotate in opposite directions, and the rotation directions of the two pairs of rollers 24 are consistent, so that after the welding wire passes through the two pairs of rollers 24 in sequence, it can be rolled downstream by each pair of rollers 24. The structural design is simple and reasonable, and the conveying of the welding wire is relatively stable.

[0036] In this embodiment, the first rotation driving device 25 can be a servo motor of an adapted model.

[0037] In this embodiment, both ends of the mounting plate 21 are slidably connected to the guide rail 3 via sliding sleeves b, thereby ensuring that the welding wire rolling device 2 can slide well relative to the guide rail 3 .

[0038] As a preferred embodiment, the side ends on both sides of the other side of the mounting plate 21 are respectively provided with coaxially distributed welding wire inlet duct 211 and welding wire outlet duct 212, and the pipe mouth of the welding wire inlet duct 211 is close to the gap between one pair of the rollers 24, and the pipe mouth of the welding wire outlet duct 212 is close to the gap between the other pair of rollers 24.

[0039] In the above embodiment, the design of the welding wire inlet conduit 211 and the welding wire outlet conduit 212 limits the direction and orientation of the welding wire in and out of the roller 24 to a certain extent, so that the welding wire will not run out of the area outside the roller 24, ensuring that the welding wire is effectively transported in the correct direction. Among them, the welding wire rolling device 2 is located on the side where the welding wire inlet conduit 211 is located.

[0040] As a preferred embodiment, the telescopic mechanism 1 includes a base 11, an eccentric wheel 12, a connecting rod 13 and a second rotation drive device. The base 11 is placed between the two guide rails 3 and is fixedly connected to the two guide rails 3. The eccentric wheel 12 is rotatably mounted on one side of the base 11 through a rotating shaft. The end face of the eccentric wheel 12 is provided with a short shaft eccentrically arranged therewith. One end of the connecting rod 13 is rotationally connected to the short shaft, and the other end of the connecting rod 13 extends toward one side of the mounting plate 21 and is pinned to an ear seat a adapted to the side end of the mounting plate 21 through a pin shaft. The second rotation drive device is mounted on the other side of the base 11 and is transmission-connected to the rotating shaft of the eccentric wheel 12.

[0041] In the above embodiment, the second rotary drive device drives the eccentric wheel 12 to rotate. During the rotation of the eccentric wheel 12, the point at which one end of the connecting rod 13 is connected to it is driven to swing eccentrically, so that the other end of the connecting rod 13 can pull the mounting plate 21 to move back and forth along the guide rail 3, thereby producing a telescopic vibration effect on the welding wire.

[0042] In this embodiment, the second rotation driving device adopts a servo motor of an adapted model.

[0043] It is necessary to add that: Figure 3 As shown, the new telescopic wire feeding mechanism for all-position TIG automatic welding of pipelines of this embodiment is used in conjunction with TIG automatic welding equipment. The TIG automatic welding equipment belongs to the prior art and generally includes an annular combined track D, which is installed near the pipe port of one of the two pipes to be welded. A welding trolley that can automatically rotate around the track D is provided, and a TIG welding device is carried on the welding trolley. At the same time, the new telescopic wire feeding mechanism for all-position TIG automatic welding of pipelines of this embodiment is installed on the welding trolley M. The TIG welding device has a wire feeding mechanism extending to the welding trolley M. The welding torch F at the seam (denoted by N in the figure) is used, and the delivered welding wire enters the welding torch F. With the circular movement of the welding trolley M and the operation of the TIG welding device, the annular weld can be welded (wherein, the designs of the welding trolley M and the track D are both prior arts, and reference can be made to the patented technology of pipeline welding system and method with announcement number CN114850619A. The TIG welding device is a product of prior art and will not be described in detail here). During the welding process, the welding wire generates telescopic vibration, which will "stir" the molten pool of the welding wire at the weld, thereby obtaining the above-mentioned technical effect.

[0044] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A new telescopic wire feeding mechanism for pipeline all-position TIG automatic welding, characterized by: The invention comprises a telescopic mechanism (1) and a welding wire rolling device (2), wherein the welding wire rolling device (2) is used to convey the welding wire passing therethrough, and the telescopic mechanism (1) is connected to the welding wire rolling device (2) and is used to drive the welding wire rolling device (2) to reciprocate and telescopically move along the conveying direction of the welding wire.

2. According to claim 1, a new telescopic wire feeding mechanism for pipeline all-position TIG automatic welding is characterized by: The telescopic mechanism (1) is located upstream in the welding wire conveying direction.

3. According to claim 1, a new telescopic wire feeding mechanism for pipeline all-position TIG automatic welding is characterized by: It also comprises two parallel guide rails (3), the welding wire rolling device (2) is slidably mounted on the two guide rails (3), the telescopic mechanism (1) is fixedly mounted on the two guide rails (3), and the telescopic mechanism (1) is used to drive the welding wire rolling device (2) to reciprocate and telescopically move along the guide rails (3).

4. According to claim 3, a new telescopic wire feeding mechanism for pipeline all-position TIG automatic welding is characterized by: The two ends of the guide rail (3) are respectively mounted on the base through brackets.

5. According to claim 3, a new telescopic wire feeding mechanism for pipeline all-position TIG automatic welding is characterized by: The welding wire rolling device (2) comprises a mounting plate (21), a driving gear (22), two pairs of follower gears (23) and two pairs of rollers (24). The two pairs of follower gears (23) are respectively mounted on one side of the mounting plate (21) via a rotating shaft, and the two follower gears (23) of each pair are meshed with each other. The driving gear (22) is mounted on one side of the mounting plate (21) via a rotating shaft and is located between two of the two pairs of follower gears (23). The driving gear (22) is meshed with two of the two pairs of follower gears (23). The two pairs of rollers (24) are respectively placed on the mounting plate (21). The other side of the mounting plate (21) is coaxially assembled with the rotating shaft of each follower gear (23) in a one-to-one correspondence, each pair of two rollers (24) are close to each other, the two pairs of rollers (24) are arranged at intervals, and the welding wire passes through each pair of two rollers (24) in sequence. The mounting plate (21) is placed between the two guide rails (3), and its two ends are respectively slidably connected to the two guide rails (3). The telescopic mechanism (1) is connected to one side of the mounting plate (21), and the other side of the mounting plate (21) is provided with a first rotating drive device (25) which is transmission-connected to the rotating shaft of the driving gear (22).

6. According to claim 5, a new telescopic wire feeding mechanism for pipeline all-position TIG automatic welding is characterized by: The first rotation driving device (25) is a motor.

7. According to claim 5, a new telescopic wire feeding mechanism for pipeline all-position TIG automatic welding is characterized by: Both ends of the mounting plate (21) are slidably connected to the guide rail (3) via sliding sleeves.

8. According to claim 5, a new telescopic wire feeding mechanism for pipeline all-position TIG automatic welding is characterized by: The side ends of the other side of the mounting plate (21) are respectively provided with a coaxially distributed welding wire inlet duct (211) and a welding wire outlet duct (212), and the pipe opening of the welding wire inlet duct (211) is close to the gap between one pair of the rollers (24), and the pipe opening of the welding wire outlet duct (212) is close to the gap between the other pair of the rollers (24).

9. A novel telescopic wire feeding mechanism for all-position TIG automatic welding of pipelines according to any one of claims 5 to 8, characterized in that: The telescopic mechanism (1) comprises a base (11), an eccentric wheel (12), a connecting rod (13) and a second rotary drive device. The base (11) is placed between the two guide rails (3) and is fixedly connected to the two guide rails (3). The eccentric wheel (12) is rotatably mounted on one side of the base (11) via a rotating shaft. The end face of the eccentric wheel (12) is provided with a short shaft eccentrically arranged therewith. One end of the connecting rod (13) is rotatably connected to the short shaft. The other end of the connecting rod (13) extends toward one side of the mounting plate (21) and is pin-connected to an ear seat adapted to the side end of the mounting plate (21) via a pin shaft. The second rotary drive device is mounted on the other side of the base (11) and is transmission-connected to the rotating shaft of the eccentric wheel (12).

10. The novel telescopic wire feeding mechanism for pipeline all-position TIG automatic welding according to claim 9 is characterized by: The second rotation driving device is a motor.

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