Universal welding device for pipe machining

Abstract

The invention relates to the technical field of welding, and discloses a universal pipe machining welding device which comprises a fixing mechanism, the fixing mechanism comprises two fixing pieces and a limiting assembly, one fixing piece is correspondingly arranged in one workpiece, and the limiting assembly is arranged in the fixing piece; the non-attached ends of the two fixing pieces are each obliquely provided with a set of limiting assemblies, the number of the set of limiting assemblies is six, and the limiting assemblies are evenly arranged around the fixing pieces. Before welding work, a fixing rod moves in a fixing shell through air suction of two air suction pumps, then a moving plate is driven to move in the direction of the air suction pumps, two limiting assemblies are synchronously pushed to abut against the inner walls of two workpieces correspondingly, the inner diameter concentricity of the two workpieces is effectively achieved, the workpiece circular seam butt joint efficiency is improved, and the welding quality is improved. And in addition, the two limiting assemblies can apply opposite thrust when abutting against each other, so that butt joint of the circular seams of the two workpieces is tighter, and the welding quality is further improved.

Description

Technical Field

[0001] The present application relates to the field of welding technology, and in particular to a welding device for general pipe processing. Background Art

[0002] Machining refers to the process of changing the shape, size or performance of a workpiece through a mechanical device. It can be divided into cutting and pressure processing according to the difference in processing methods. Welding is often required in the machining process. The welding process is also called fusion or melting. It is a manufacturing process and technology that joins metals or other thermoplastic materials (such as plastics) by heating, high temperature or high pressure. The welding device is the equipment required to implement the welding process, mainly including a fixture for supporting and fixing the workpiece, a welding machine for connecting the weld between two workpieces, etc. When working, first install the workpiece on the fixed component, and then use the welding component to weld the workpiece.

[0003] As an indispensable material in many fields, pipes are widely used in mechanical equipment in the construction, manufacturing, petroleum, chemical, electric power, medical and other industries. Circumferential welding of pipes is a process of circular welding of the interface of pipes. During the work, the interfaces of the two pipes need to be aligned to ensure the quality of the welding.

[0004] However, the existing welding devices still have some defects during use: when welding pipes, especially when butt-jointing circumferential seams, concentricity problems are often encountered. If the concentricity of the two pipes is poor, it may cause stress concentration, affecting the sealing and strength of the pipes. However, under normal circumstances, the wall thickness of the pipes may be different. If the outer diameters of the two pipes are the same but the wall thicknesses are different, then the inner diameters will be different. The common standard is: inner diameter concentricity is suitable for pressure pipes or pipes that require fluid to pass through, because the alignment of the inner walls can reduce flow resistance and avoid turbulence or sediment accumulation, while outer diameter concentricity is suitable for structural parts because the appearance and external assembly require consistency. However, in actual work, in order to facilitate clamping of the pipe, the welding device often sets the clamp on the outer ring of the pipe to clamp and fix the outer wall of the pipe, that is, the outer diameter concentricity is adopted, which makes it impossible to ensure the concentricity of the inner diameter when the circumferential seams of the two pipes are butt-jointed, affecting the processing quality. Summary of the invention

[0005] The present application proposes a universal welding device for pipe processing, which has the advantage of effectively utilizing a fixing mechanism to improve the inner diameter concentricity between two workpieces, and is used to solve the problem of poor inner diameter concentricity of the two workpieces caused by the fixture setting in the existing welding process.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solution: a general pipe processing welding device, comprising: Workpieces, the number of the workpieces is two, and the interfaces of the two workpieces are fitted together, and the interface area of ​​the two workpieces is called an annular seam; A fixing mechanism, a fixing mechanism is sleeved inside the interface of the two workpieces, which is used to control the concentricity of the inner diameters of the two workpieces. The fixing mechanism includes a fixing piece and a limiting assembly. The number of the fixing pieces is two, and one fixing piece is correspondingly arranged in one workpiece. The mutually fitting ends of the two fixing pieces are connected by fixing bolts, and the two fixing pieces are concentrically arranged. The non-fitting ends of the two fixing pieces are obliquely provided with a group of limiting assemblies. The number of a group of limiting assemblies is six, and they are evenly arranged around the fixing pieces. The two groups of limiting assemblies on the fixing mechanism are synchronously controlled to respectively contact the inner walls of the two workpieces to achieve the concentricity of the inner diameters of the two workpieces.

[0007] Furthermore, the fixing mechanism further comprises: An air pump, a fixing groove is provided at one end of one side of the fixing member, an air pump is fixedly sleeved in the fixing groove at the end of the fixing member, two adjacent air pumps are in a fitted state, an arc groove is provided at the end of the fixing member fitted with the other fixing member, and the arc grooves of the two fixing members can be spliced ​​into a circular cavity, the wall surfaces of the two fixing members located at the inner circle of the circular cavity are fitted, and the wall surfaces of the two fixing members located at the outer circle of the circular cavity are not fitted, the position of the circular cavity corresponds to the position of the annular seam, and the air pump has two air ports, one of which is connected to the circular cavity, and the other is connected to the fixing groove; A fixing plate is fixedly sleeved in the fixing groove on one side of the vacuum pump, and a transverse hole is opened in the middle of the fixing plate. The space between the vacuum pump and the fixing plate is called a fixing cavity; A fixed shell, wherein the middle part of one side of the fixed plate is fixedly connected to one end of the fixed shell, and a transverse cavity is opened in the middle part of the fixed shell, and the transverse hole of the fixed plate is connected to the transverse cavity of the fixed shell; A fixing rod, wherein the transverse cavity of the fixing shell is movably sleeved with one end of the fixing rod; The movable plate, the other end of the fixing rod passes through the end of the fixing piece and is fixedly connected to the movable plate, a fixing spring is arranged between the inner wall of the fixing piece and the outer wall of the fixing shell, and the fixing spring is movably sleeved on the outside of the fixing rod.

[0008] A circular cavity is provided at the interface of two fixing parts, and the gas extracted by the vacuum pump is discharged from the fixing part by the circular cavity. Since the circular cavity faces the annular seam, the welding point is effectively cooled and shaped, thereby further improving the welding quality.

[0009] Furthermore, the limiting component includes: A main limiter, wherein the main limiter is in a "J" shape and is obliquely movably sleeved on the fixing member, a limit strip is arranged on the outer wall of the main limiter region sleeved on the fixing member, one end of the main limiter located outside the end of the fixing member contacts the movable plate, and a limit spring is movably sleeved on the outside of the main limiter, one end of the limit spring is fixedly connected to the bottom of the main limiter, and the other end of the limit spring is fixedly connected to the end of the fixing member; An auxiliary limiting member, wherein one end of the main limiting member that contacts the workpiece is fixedly sleeved with the auxiliary limiting member, the auxiliary limiting member is arc-shaped, and the outer wall of the auxiliary limiting member is not completely in contact with the inner wall of the workpiece; A limiting tube, half of which is fixedly sleeved in the main limiting member, and the other half of which is fixedly sleeved in the fixing member, one end of which passes through the main limiting member and is connected to the interior of the auxiliary limiting member, and the other end of which passes through the fixing plate and is connected to the fixing cavity.

[0010] Furthermore, the auxiliary limiting member is composed of a bottom shell and a top membrane, and the top end of the bottom shell is fixedly connected to the bottom end of the top membrane, the bottom shell is a hard material, and the bottom shell is located close to the fixing mechanism, the top membrane is a flexible material, and the top membrane is located close to the workpiece, and a plurality of air holes are opened on the top membrane.

[0011] By sleeved the auxiliary limit piece on the main limit piece in contact with the inner wall of the workpiece, and using the limit tube to connect the interior of the auxiliary limit piece with the fixed cavity, the gas inside the auxiliary limit piece can be effectively extracted when the vacuum pump is pumping air. Also, because the air holes are opened on the top membrane, the auxiliary limit piece will generate suction on the inner wall of the workpiece, effectively enhancing the connection stability between the limit assembly and the workpiece.

[0012] Furthermore, it also includes: A supporting mechanism is provided below the two workpieces to support the workpieces and control the rotation of the workpieces; A working mechanism is provided outside the supporting mechanism, and the working mechanism corresponds to the position of the annular seam of the workpiece, and is used for performing welding operations on the annular seam of the workpiece.

[0013] Furthermore, the supporting mechanism comprises: Support plates, the number of the support plates is two, and the two support plates are arranged in parallel; Elevators, the support plate is fixedly provided with elevators, the number of the elevators is four groups, and the number of elevators in each group is two, the four groups of telescopic elevators are evenly arranged horizontally on the support plate, and one group of elevators is arranged in parallel; A lifting plate, the top of each set of lifts is fixedly connected with a lifting plate; Roller frames are arranged on both sides of the top of the lifting plate.

[0014] By setting a supporting mechanism outside the two workpieces, and the supporting mechanism consists of a supporting plate, a lift, a lifting plate and a roller frame, before welding, the two workpieces are placed on the supporting mechanism, and the lift is controlled by the lift to make the roller frame fully contact with the outer rings at different positions on the two workpieces, effectively ensuring the stability during welding and further improving the welding quality.

[0015] Furthermore, the working mechanism includes: A working column, wherein the working column is in an inverted "L" shape; A welding machine is provided at the middle of the top end of the working column, and the welding machine corresponds to the annular seam, and the welding machine is an arc welding machine.

[0016] The beneficial effects of the present invention are as follows: The present application provides a universal welding device for pipe processing, which is provided with a fixing mechanism inside the interface of two workpieces, and the fixing mechanism is composed of a fixing part, an air pump, a fixing plate, a fixing shell, a fixing rod, a movable plate and a limiting assembly. Before welding, the air is drawn by the two air pumps to move the fixing rod in the fixing shell, thereby driving the movable plate to move toward the air pump, so that the two sets of limiting assemblies are pushed synchronously and respectively collide with the inner walls of the two workpieces, effectively achieving the concentricity of the inner diameters of the two workpieces, enhancing the efficiency and efficiency of the annular seam docking of the workpieces, and improving the welding quality. The other two sets of limiting assemblies will apply opposite thrusts when they collide, so that the annular seams of the two workpieces are more tightly docked, further improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work: Figure 1 It is a three-dimensional structural diagram of the whole of the present invention; Figure 2 It is a cross-sectional three-dimensional structural diagram of the whole of the present invention; Figure 3 For the present invention Figure 2 A magnified structural diagram; Figure 4 For the present invention Figure 2 The enlarged structure diagram at B; Figure 5 For the present invention Figure 2 The enlarged structure diagram at C; Figure 6 It is a partial cross-sectional structural diagram of the support mechanism in the present invention; Figure 7 It is a three-dimensional structural diagram of the working mechanism in the present invention; Figure 8 It is a three-dimensional structural diagram of the fixing mechanism located at two workpiece sections in the present invention; Fig. 9 It is a three-dimensional structural diagram of the fixing mechanism in the present invention; Fig.10 It is a cross-sectional three-dimensional structural diagram of the fixing mechanism in the present invention; Fig.11 It is a three-dimensional structural diagram of a fixing member and its internal components in the present invention; Fig.12 It is a cross-sectional three-dimensional structural diagram of a fixing member and its internal components in the present invention; Fig.13 It is a three-dimensional structural diagram of a limiting component in the present invention; Fig.14 It is a cross-sectional three-dimensional structural diagram of the limiting component located at the auxiliary limiting member in the present invention.

[0018] In the figure: 1. supporting mechanism; 11. supporting plate; 12. lifting machine; 13. lifting plate; 14. roller frame; 2. working mechanism; 21. working column; 22. welding machine; 3. workpiece; 4. fixing mechanism; 40. fixing bolt; 41. fixing part; 42. vacuum pump; 43. fixing plate; 44. fixing shell; 45. fixing rod; 46. moving plate; 5. limiting assembly; 51. main limiting part; 52. auxiliary limiting part; 521. bottom shell; 522. top membrane; 53. limiting tube. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Embodiment 1, a general pipe processing welding device, comprising a workpiece 3, such as Figure 1-Figure 2 , Figure 8 The number of workpieces 3 is two, and the interfaces of the two workpieces 3 fit together. The interface area of ​​the two workpieces 3 is called a circumferential seam that needs to be welded.

[0021] like Figure 1-Figure 2 A support mechanism 1 is provided below the two workpieces 3 for supporting the workpieces 3 and controlling the rotation of the workpieces 3. The support mechanism 1 includes a support plate 11, a lift 12, a lift plate 13 and a roller frame 14. Figure 6The number of support plates 11 is two, and the two support plates 11 are arranged in parallel. A lift 12 is fixedly arranged inside the support plate 11. The number of lifts 12 is four groups, and the number of each group of lifts 12 is two. The four groups of telescopic lifts 12 are evenly arranged horizontally on the support plate 11, and one group of lifts 12 is arranged in parallel, which can provide power for realizing the vertical movement of the lift plate 13. The top of each group of lifts 12 is fixedly connected with a lift plate 13, and roller frames 14 are arranged on both sides of the top of the lift plate 13. When the workpiece 3 is placed on the support mechanism 1 and no welding operation is performed, the lift 12 can be used to control the lifting and lowering of the lift plate 13, so that the roller frame 14 can fully contact the outer rings at different positions on the two workpieces 3, thereby effectively ensuring the stability during welding and further improving the welding quality. When the workpiece 3 is subjected to welding operation, the roller frame 14 can rotate to drive the workpiece 3 to rotate, thereby realizing the circumferential welding of the annular seam.

[0022] like Figure 1-Figure 2 A working mechanism 2 is disposed outside the supporting mechanism 1, and the working mechanism 2 corresponds to the annular seam position of the workpiece 3, and is used to perform welding operation on the annular seam of the workpiece 3. The working mechanism 2 includes a working column 21 and a welding machine 22. Figure 7 The working column 21 is in an inverted "L" shape. A welding machine 22 is arranged in the middle of the top of the working column 21, and the welding machine 22 corresponds to the annular seam. The welding machine 22 is an arc welding machine, thereby ensuring the accuracy of the annular seam welded by the welding machine 22.

[0023] like Figure 1-Figure 5 The interface of the two workpieces 3 is internally sleeved with a fixing mechanism 4 for controlling the inner diameters of the two workpieces 3 to be concentric. The fixing mechanism 4 includes a fixing member 41, an air pump 42, a fixing plate 43, a fixing shell 44, a fixing rod 45, a moving plate 46 and a limiting assembly 5, specifically: like Figure 8-Figure 12 The number of fixing members 41 is two, and one fixing member 41 is correspondingly arranged in one workpiece 3. The mutually fitting ends of the two fixing members 41 are connected by a fixing bolt 40, and the two fixing members 41 are concentrically arranged, so that the two fixing members 41 and the fixing bolts 40 are assembled, which facilitates the disassembly and replacement of the two fixing members 41 according to actual needs. If the diameters of the two fixing members 41 are different, the fixing member 41 suitable for the size of the corresponding workpiece 3 can be replaced as needed.

[0024] like Fig.10 , Fig.12 A fixing groove is provided at one end of the fixing member 41, and an air pump 42 is fixedly sleeved in the fixing groove at the end of the fixing member 41. The opening and closing of the air pump 42 is realized by remote control technology. The two adjacent air pumps 42 are in a fitted state, which helps to improve the stability of the setting of the air pump 42. Figure 5An arc groove is provided at the end of the fixing member 41 that is in contact with another fixing member 41, and the arc grooves of the two fixing members 41 can be spliced ​​into a circular cavity. The end walls of the two fixing members 41 located in the inner circle of the circular cavity are in contact with each other, and the end walls of the two fixing members 41 located in the outer circle of the circular cavity are not in contact with each other, so that the circular cavity can be connected with the outside world, which is convenient for air to enter and exit the circular cavity. The position of the circular cavity corresponds to the position of the annular seam, so that the circular cavity can blow air to the annular seam when exhausting or inhaling air, so as to realize timely cooling of the inner side of the annular seam after welding. The vacuum pump 42 has two air ports, and one air port is connected with the circular cavity, and the other air port is connected with the fixing groove, so that the gas can move inside and outside the fixing mechanism 4, thereby providing power for changing the position state of the limit assembly 5.

[0025] like Fig.10 , Fig.12 A fixing plate 43 is fixedly sleeved in the fixing groove on one side of the vacuum pump 42, and a transverse hole is opened in the middle of the fixing plate 43. The space between the vacuum pump 42 and the fixing plate 43 is called a fixing cavity, which can provide space for gathering and dispersing gas. Specifically, if the vacuum pump 42 draws gas from the inside, the fixing cavity can gather gas from the fixing shell 44 and the limiting component 5, thereby realizing the overall expansion of the limiting component 5, facilitating the stable installation of the fixing mechanism 4 on the workpiece 3, and thus making the inner diameters of the two workpieces 3 concentric. If the vacuum pump 42 draws gas from the outside, the fixing cavity can disperse the gas into the fixing shell 44 and the limiting component 5, thereby realizing the overall contraction of the limiting component 5, facilitating the removal of the fixing mechanism 4 from the workpiece 3.

[0026] like Fig.10 , Fig.12 The middle part of one side of the fixed plate 43 is fixedly connected to one end of the fixed shell 44, and a transverse cavity is opened in the middle part of the fixed shell 44. The transverse hole of the fixed plate 43 is connected to the transverse cavity of the fixed shell 44, so that the gas can move in the transverse cavity and the transverse hole under the action of external force.

[0027] like Fig.10 , Fig.12The transverse cavity of the fixed shell 44 is movably connected with one end of the fixed rod 45, and the other end of the fixed rod 45 passes through the end of the fixed part 41 and is fixedly connected to the movable plate 46. A fixing spring is provided between the inner wall of the fixing part 41 and the outer wall of the fixed shell 44, and the fixing spring is movably connected to the outside of the fixing rod 45. When the vacuum pump 42 is pumping air, the gas in the transverse cavity of the fixed shell 44 is reduced, and the fixing rod 45 is affected by the suction force of the gas to overcome the pulling force of the fixing spring and approach the vacuum pump 42, thereby driving the movable plate 46 to move in the same direction, and then pushing the six limit assemblies 5 to move obliquely outward, so as to realize the resistance of the limit assembly 5 to the workpiece 3. When the vacuum pump 42 is sucking air, the gas in the transverse cavity of the fixed shell 44 increases, and the fixing rod 45 is affected by the fixing spring to move away from the vacuum pump 42, thereby driving the movable plate 46 to move in the same direction, so that the six limit assemblies 5 are no longer affected by the thrust of the movable plate 46 and move obliquely inward, so that the limit assembly 5 no longer resists the workpiece 3.

[0028] like Figure 8-Figure 13 The non-fitting ends of the two fixing members 41 are both obliquely provided with a set of limiting components 5, the number of each set of limiting components 5 is six, and they are evenly arranged around the fixing member 41, and the two sets of limiting components 5 on the fixing mechanism 4 are synchronously controlled to respectively contact the inner walls of the two workpieces 3, so that the inner diameters of the two workpieces 3 are concentric. Specifically, the limiting components 5 include a main limiting member 51, such as Fig.13 The main limit member 51 is in the shape of a "J" letter, and the main limit member 51 is obliquely movably sleeved on the fixing member 41. A limiting strip is arranged on the outer wall of the main limit member 51 area sleeved on the fixing member 41, which effectively enhances the stability of the main limit member 51 sleeved on the fixing member 41 and prevents the main limit member 51 from deflecting in the fixing member 41. One end of the main limit member 51 located outside the end of the fixing member 41 contacts the movable plate 46, and the external movability of the main limit member 51 is sleeved with a limiting spring, one end of the limiting spring is fixedly connected to the bottom of the main limit member 51, and the other end of the limiting spring is fixedly connected to the end of the fixing member 41. When the vacuum pump 42 draws air, the main limit member 51 is subjected to the thrust and overcomes the action of the limiting spring and moves obliquely outward. When the vacuum pump 42 inhales air, the main limit member 51 is acted upon by the limiting spring and moves obliquely inward.

[0029] Embodiment 2, based on embodiment 1, the limiting assembly 5 further includes an auxiliary limiting member 52 and a limiting tube 53, such as Figure 3-Figure 4 , Figure 13-Figure 14One end of the main limiting member 51 that contacts the workpiece 3 is fixedly sleeved with an auxiliary limiting member 52. The auxiliary limiting member 52 is in an arc shape, and the outer wall of the auxiliary limiting member 52 is not completely in contact with the inner wall of the workpiece 3. The contact between the auxiliary limiting member 52 and the workpiece 3 is utilized to enhance the stability of the connection between the limiting assembly 5 and the workpiece 3, and prevent the limiting and fixing effect of the limiting assembly 5 on the workpiece 3 from being reduced during the welding process. Half of the limiting tube 53 is fixedly sleeved in the main limiting member 51, and the other half of the limiting tube 53 is fixedly sleeved in the fixing member 41. One end of the limiting tube 53 passes through the main limiting member 51 and contacts the workpiece 3. The interior of the auxiliary limiter 52 is connected, and the other end of the limiter tube 53 passes through the fixed plate 43 and is connected to the fixed cavity. When the vacuum pump 42 draws air, the gas in the auxiliary limiter 52 can be discharged into the fixed cavity through the limiter tube 53, in order to further enhance the adsorption effect of the auxiliary limiter 52 on the workpiece 3. When the vacuum pump 42 inhales air, the gas in the fixed cavity can be discharged into the auxiliary limiter 52 through the limiter tube 53, so that the auxiliary limiter 52 no longer has an adsorption effect on the workpiece 3, so that the auxiliary limiter 52 does not fit the workpiece 3, which facilitates the removal of the fixing mechanism 4 from the workpiece 3.

[0030] like Fig.14 The auxiliary limiting member 52 is composed of a bottom shell 521 and a top membrane 522, and the top end of the bottom shell 521 is fixedly connected to the bottom end of the top membrane 522, the bottom shell 521 is made of a hard material, and the bottom shell 521 is located near the fixing mechanism 4, the top membrane 522 is made of a flexible material, and the top membrane 522 is located near the workpiece 3, and a plurality of air holes are opened on the top membrane 522. By utilizing the material and shape settings of the bottom shell 521 and the top membrane 522, the auxiliary limiting member 52 can always produce an adsorption effect on the inner wall of the workpiece 3 through the air holes during the vacuum operation, thereby effectively enhancing the connection stability between the limiting component 5 and the workpiece 3, and preventing the limiting component 5 from being offset during welding and affecting the limiting support for the workpiece 3.

[0031] The working principle of the method of the present invention is as follows: Before welding, the interfaces of the two workpieces 3 need to be aligned. First, the left fixing piece 41 is placed inside the interface of the left workpiece 3 to be welded. Then, the vacuum pump 42 in the fixing piece 41 is started to put it in a vacuum state, so that the gas in the transverse cavity of the fixing shell 44 is extracted and discharged into the circular cavity through the vacuum pump 42. During this process, the fixing shell 44 pushes the fixing rod 45 to move toward the vacuum pump 42 due to the reduction of air pressure in the transverse cavity, thereby driving the moving plate 46 to move synchronously. At this time, the moving plate 46 will push the six limit assemblies 5 to move obliquely outward, forming an expansion trend, until it conflicts with the inner wall of the workpiece 3, thereby fixing the left side of the mechanism 4. The right side of the fixing mechanism 4 is concentrically arranged with the workpiece 3 on the left side, and then the fixing part 41 on the right side is placed into the interface to be welded of the workpiece 3 on the right side, and the interfaces of the two workpieces 3 are fitted together, and then the vacuum pump 42 in the fixing part 41 is started to complete the above operation, so that the right side of the fixing mechanism 4 is concentrically arranged with the workpiece 3 on the right side, thereby achieving the concentricity of the inner diameters of the two workpieces 3, enhancing the efficiency and effect of the annular seam butt joint of the workpieces 3, and improving the welding quality. In addition, due to the shape and position design of the two sets of limit assemblies 5, the effective limit assemblies 5 will apply opposite thrusts when they come into conflict with the workpiece 3, making the annular seam butt joint of the two workpieces 3 tighter, further improving the welding quality.

[0032] During the vacuum operation of the vacuum pump 42, since the main limit member 51 is in contact with the inner wall of the workpiece 3 and the auxiliary limit member 52 is in contact with the workpiece 3, when the vacuum pump 42 extracts the gas in the auxiliary limit member 52 through the limit tube 53, the auxiliary limit member 52 can always generate suction on the inner wall of the workpiece 3 through the air hole, thereby effectively enhancing the connection stability between the limit assembly 5 and the workpiece 3.

[0033] Before welding and after the fixing mechanism 4 is installed, the two workpieces 3 with the fixing mechanism 4 internally connected are placed on the top of the supporting mechanism 1, and then the elevator 12 is started to control the vertical movement of the lifting plate 13, effectively ensuring that the roller frame 14 is in full contact with the outer rings at different positions on the two workpieces 3, thereby providing stability during welding and further improving the welding quality.

[0034] When welding is performed, the roller frame 14 is started according to actual needs, so that the roller frame 14 can rotate, thereby rubbing the workpiece 3 to achieve slow rotation of the workpiece 3. During this process, the welding machine 22 is started, so that the welding machine 22 is aligned with the annular seam for circumferential welding operations. During this process, if the adsorption effect between the auxiliary limit member 52 and the inner wall of the workpiece 3 is reduced, the vacuum pump 42 will perform a vacuum operation, that is, the vacuum pump 42 adopts an intermittent working mode during operation, which effectively ensures the stability of the limit assembly 5 against the workpiece 3, prevents the concentricity of the inner diameter between the two from being affected by the rotation of the workpiece 3, and can continuously cool the inner circle of the annular seam.

[0035] When welding is completed, the vacuum pump 42 is started to put it in the suction state, so that the air outside the fixing mechanism 4 is discharged into the fixing cavity and dispersed into the fixing shell 44 and the auxiliary limit member 52, effectively restoring the internal air pressure, thereby causing the limit assembly 5 to move obliquely inward, forming a contraction trend until it no longer conflicts with the inner wall of the workpiece 3. Finally, the fixing mechanism 4 is restored to its original state and taken out from the end of a workpiece 3.

[0036] During the overall operation of the vacuum pump 42, since the circular cavity corresponds to the position of the annular seam, and the vacuum pump 42 discharges gas through the circular cavity in the vacuum state, and inhales gas through the circular cavity in the suction state, air flow is blown to the area inside the annular seam, effectively accelerating the cooling efficiency, prompting the workpiece 3 to cool and shape in time, and further improving the welding quality.

[0037] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A general-purpose pipe processing welding device, characterized in that: include: Workpieces (3), the number of the workpieces (3) is two, and the interfaces of the two workpieces (3) are in contact with each other, and the interface area of ​​the two workpieces (3) in contact is called an annular seam; A fixing mechanism (4) is sleeved inside the interface of the two workpieces (3) and is used to control the inner diameters of the two workpieces (3) to be concentric. The fixing mechanism (4) comprises a fixing piece (41) and a limiting assembly (5). The number of the fixing pieces (41) is two, and one fixing piece (41) is correspondingly arranged in one workpiece (3). The ends of the two fixing pieces (41) that fit together are connected by a fixing bolt (40), and the two fixing pieces (41) are concentrically arranged. The ends of the two fixing pieces (41) that do not fit together are obliquely provided with a group of limiting assemblies (5). The number of the group of limiting assemblies (5) is six and they are evenly arranged around the fixing piece (41). The two groups of limiting assemblies (5) on the fixing mechanism (4) are synchronously controlled to respectively contact the inner walls of the two workpieces (3), so as to achieve the concentricity of the inner diameters of the two workpieces (3).

2. The universal pipe processing welding device according to claim 1, characterized in that: The fixing mechanism (4) further comprises: An air pump (42), wherein a fixing groove is provided at one end of the fixing member (41), and an air pump (42) is fixedly sleeved in the fixing groove at the end of the fixing member (41), and two adjacent air pumps (42) are in a fitted state, and an arc groove is provided at the end of the fixing member (41) that is fitted with the other fixing member (41), and the arc grooves of the two fixing members (41) can be spliced ​​into a circular cavity, and the end walls of the two fixing members (41) located at the inner circle of the circular cavity are fitted together, and the end walls of the two fixing members (41) located at the outer circle of the circular cavity are not fitted together, and the position of the circular cavity corresponds to the position of the annular seam, and the air pump (42) has two air ports, and one air port is connected to the circular cavity, and the other air port is connected to the fixing groove; A fixing plate (43) is fixedly sleeved in a fixing groove located on one side of the air pump (42), and a transverse hole is opened in the middle of the fixing plate (43). The space between the air pump (42) and the fixing plate (43) is called a fixing cavity; A fixed shell (44), wherein a middle portion of one side of the fixed plate (43) is fixedly connected to one end of the fixed shell (44), and a transverse cavity is provided in the middle portion of the fixed shell (44), and a transverse hole of the fixed plate (43) is in communication with the transverse cavity of the fixed shell (44); A fixing rod (45), wherein the transverse cavity of the fixing shell (44) is movably sleeved with one end of the fixing rod (45); A movable plate (46), the other end of the fixed rod (45) passes through the end of the fixed member (41) and is fixedly connected to the movable plate (46), a fixed spring is provided between the inner wall of the fixed member (41) and the outer wall of the fixed shell (44), and the fixed spring is movably sleeved on the outside of the fixed rod (45).

3. The universal pipe processing welding device according to claim 2, characterized in that: The limiting component (5) comprises: A main limiting member (51), the main limiting member (51) being in a "J" shape, and the main limiting member (51) being obliquely movably sleeved on the fixing member (41), a limiting strip being arranged on the outer wall of the region of the main limiting member (51) sleeved on the fixing member (41), one end of the main limiting member (51) located outside the end of the fixing member (41) being in contact with the movable plate (46), and a limiting spring being movably sleeved on the outside of the main limiting member (51), one end of the limiting spring being fixedly connected to the bottom of the main limiting member (51), and the other end of the limiting spring being fixedly connected to the end of the fixing member (41); An auxiliary limiting member (52), wherein one end of the main limiting member (51) that contacts the workpiece (3) is fixedly sleeved with the auxiliary limiting member (52), the auxiliary limiting member (52) being arc-shaped, and the outer wall of the auxiliary limiting member (52) is not completely in contact with the inner wall of the workpiece (3); A limiting tube (53), wherein one half of the limiting tube (53) is fixedly sleeved in the main limiting member (51), and the other half of the limiting tube (53) is fixedly sleeved in the fixing member (41), one end of the limiting tube (53) passes through the main limiting member (51) and is communicated with the interior of the auxiliary limiting member (52), and the other end of the limiting tube (53) passes through the fixing plate (43) and is communicated with the fixing cavity.

4. The universal pipe processing welding device according to claim 3, characterized in that: The auxiliary limiting member (52) is composed of a bottom shell (521) and a top membrane (522), and the top end of the bottom shell (521) is fixedly connected to the bottom end of the top membrane (522); the bottom shell (521) is made of a hard material and is located near the fixing mechanism (4); the top membrane (522) is made of a flexible material and is located near the workpiece (3); and a plurality of air holes are provided on the top membrane (522).

5. The universal pipe processing welding device according to claim 1, characterized in that: Also includes: A support mechanism (1), wherein a support mechanism (1) is disposed below the two workpieces (3) and is used to support the workpieces (3) and control the rotation of the workpieces (3); A working mechanism (2), wherein the working mechanism (2) is arranged outside the supporting mechanism (1), and the working mechanism (2) corresponds to the position of the annular seam of the workpiece (3), and is used to perform a welding operation on the annular seam of the workpiece (3).

6. The universal pipe processing welding device according to claim 5, characterized in that: The supporting mechanism (1) comprises: A support plate (11), wherein the number of the support plates (11) is two, and the two support plates (11) are arranged in parallel; A lift (12), wherein the support plate (11) is fixedly provided with a lift (12), the lift (12) being provided in four groups, and each group of lifts (12) being provided with two lifts, the four groups of telescopic lifts (12) being evenly arranged horizontally on the support plate (11), and one group of lifts (12) being provided in parallel; A lifting plate (13), the top end of each set of lifts (12) being fixedly connected to a lifting plate (13); Roller frames (14), with roller frames (14) being arranged on both sides of the top end of the lifting plate (13).

7. The universal pipe processing welding device according to claim 5, characterized in that: The working mechanism (2) comprises: A working column (21), wherein the working column (21) is in an inverted "L" shape; A welding machine (22), wherein a welding machine (22) is disposed at the middle of the top end of the working column (21), and the welding machine (22) corresponds to the annular seam, and the welding machine (22) is an arc welding machine.

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