A universal welding device for pipe processing

Abstract

The present application relates to the field of welding technology, and discloses a universal welding device for pipe processing, including a fixing mechanism, wherein the fixing mechanism includes a fixing part and a limiting assembly, the number of the fixing parts is two, and a corresponding fixing part is provided in a workpiece, and the non-fitting ends of the two fixing parts are obliquely provided with a group of limiting assemblies, and the number of a group of limiting assemblies is six, and they are evenly arranged around the fixing part. Before welding, the present invention uses the air extraction of two vacuum pumps to move the fixing rod in the fixed shell, thereby driving the moving plate to move toward the vacuum pump, so that the two groups of limiting assemblies are synchronously pushed 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 groups 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.

Description

Technical Field

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

[0002] Machining refers to the process of changing the dimensions or performance of a workpiece using mechanical equipment. It can be divided into cutting and press working based on the processing method. Machining often requires welding. Welding, also known as fusion or melting, is a manufacturing process and technology that uses heat, high temperature, or high pressure to join metals or other thermoplastic materials (such as plastics). Welding equipment is the equipment required to perform the welding process. It primarily includes fixtures for supporting and fixing workpieces and welding machines for connecting the weld seams between two workpieces. During operation, the workpiece is first mounted on a fixed component, and then welded using welding components.

[0003] As an indispensable material in many fields, pipes are widely used in machinery and equipment in industries such as construction, manufacturing, petroleum, chemical, power, and medical. Circumferential welding of pipes involves the process of welding the joints of the pipes in a circular manner. During welding, the joints of the two pipes must be aligned to ensure weld quality.

[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 two pipes have the same outer diameter but different wall thickness, then the inner diameter 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, adopts the outer diameter concentric method, 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] To achieve the above objectives, the present application adopts the following technical solution: a universal pipe processing welding device, comprising:

[0007] Workpieces, wherein the number of the workpieces is two, and interfaces of the two workpieces are affixed to each other, and an interface area of ​​the two workpieces affixed to each other is called an annular seam;

[0008] 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 part and a limiting assembly. The number of the fixing parts is two, and a fixing part is correspondingly arranged in one workpiece. The mutually fitting ends of the two fixing parts are connected by a fixing bolt, and the two fixing parts are concentrically arranged. The non-fitting ends of the two fixing parts 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 parts. The two groups of limiting assemblies on the fixing mechanism are synchronously controlled to respectively conflict with the inner walls of the two workpieces to achieve the concentricity of the inner diameters of the two workpieces.

[0009] Furthermore, the fixing mechanism further includes:

[0010] An air pump, a fixing groove is provided on one end of the fixing piece, an air pump is fixedly sleeved in the fixing groove at the end position of the fixing piece, two adjacent air pumps are in a fitted state, an arc groove is provided on the end of the fixing piece fitted with the other fixing piece, and the arc grooves of the two fixing pieces can be spliced ​​into a circular cavity, the wall surfaces of the two fixing pieces located on the inner circle of the circular cavity fit together, and the wall surfaces of the two fixing pieces located on the outer circle of the circular cavity do not fit together, the position of the circular cavity corresponds to the position of the annular seam, 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;

[0011] A fixing plate is fixedly sleeved in the fixing groove on one side of the vacuum pump, and a horizontal 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;

[0012] A fixed shell, wherein the middle portion 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 portion of the fixed shell, and the transverse hole of the fixed plate is connected to the transverse cavity of the fixed shell;

[0013] A fixing rod, wherein the transverse cavity of the fixing shell is movably sleeved with one end of the fixing rod;

[0014] 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 provided 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.

[0015] By opening a circular cavity at the interface of the two fixing parts and using the circular cavity to discharge the gas extracted by the vacuum pump out of the fixing parts, and because the circular cavity is facing the annular seam, the welding point is effectively cooled and shaped, further improving the welding quality.

[0016] Furthermore, the limiting component includes:

[0017] A main limiter, wherein the main limiter is in a "J" shape and is obliquely movably sleeved on the fixed member. A limit strip is provided on the outer wall of the main limiter region sleeved on the fixed member. One end of the main limiter located outside the end of the fixed 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 fixed member.

[0018] An auxiliary limiting member is fixedly sleeved on one end of the main limiting member that contacts the workpiece, the auxiliary limiting member is arc-shaped, and the outer wall of the auxiliary limiting member does not completely fit the inner wall of the workpiece;

[0019] A limiting tube, half of which is fixedly sleeved in the main limiting part, and the other half of which is fixedly sleeved in the fixing part, one end of which passes through the main limiting part and is connected to the interior of the auxiliary limiting part, and the other end of which passes through the fixing plate and is connected to the fixing cavity.

[0020] Furthermore, the auxiliary limiter 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 is located close to the fixing mechanism. The top membrane is a flexible material and is located close to the workpiece. Several air holes are provided on the top membrane.

[0021] By fitting an auxiliary limiter onto the main limiter in contact with the inner wall of the workpiece, and using a limiter tube to connect the interior of the auxiliary limiter with the fixed cavity, the gas inside the auxiliary limiter can be effectively extracted when the vacuum pump is pumping air. Moreover, since air holes are provided on the top membrane, the auxiliary limiter will generate suction on the inner wall of the workpiece, effectively enhancing the connection stability between the limiter assembly and the workpiece.

[0022] Furthermore, it also includes:

[0023] A support mechanism is provided below the two workpieces for supporting the workpieces and controlling their rotation;

[0024] 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.

[0025] Furthermore, the support mechanism includes:

[0026] Support plates, wherein the number of the support plates is two, and the two support plates are arranged in parallel;

[0027] Elevator, the support plate is fixed with an elevator, the number of the elevator 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;

[0028] A lifting plate, the top of each set of elevators is fixedly connected to a lifting plate;

[0029] Roller frames are provided on both sides of the top of the lifting plate.

[0030] By setting up a support mechanism outside the two workpieces, and the support mechanism consists of a support plate, a lift, a lifting plate and a roller frame, before welding, the two workpieces are placed on the support 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.

[0031] Furthermore, the working mechanism includes:

[0032] A working column, wherein the working column is in an inverted "L" shape;

[0033] 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.

[0034] The beneficial effects of the present invention are as follows:

[0035] 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 pumped by the two air pumps to move the fixing rod in the fixed 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 circumferential 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 circumferential seams of the two workpieces are more tightly docked, further improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. Those skilled in the art can also derive other drawings based on the provided drawings without inventive work.

[0037] Figure 1 It is a three-dimensional structural diagram of the whole of the present invention;

[0038] Figure 2 It is a cross-sectional three-dimensional structural diagram of the entire present invention;

[0039] Figure 3 For the present invention Figure 2 A magnified structural diagram of point A;

[0040] Figure 4 For the present invention Figure 2 The enlarged structure diagram at B;

[0041] Figure 5 For the present invention Figure 2 The enlarged structure diagram at C;

[0042] Figure 6 It is a partial cross-sectional structural diagram of the support mechanism in the present invention;

[0043] Figure 7 It is a three-dimensional structural diagram of the working mechanism of the present invention;

[0044] Figure 8 It is a three-dimensional structural diagram of the fixing mechanism located at two workpiece cross sections in the present invention;

[0045] Figure 9 It is a three-dimensional structural diagram of the fixing mechanism in the present invention;

[0046] Figure 10 It is a cross-sectional three-dimensional structural diagram of the fixing mechanism in the present invention;

[0047] Figure 11 A three-dimensional structural diagram of a fixing member and its internal components in the present invention;

[0048] Figure 12 A cross-sectional perspective structural diagram of a fixing member and its internal components in the present invention;

[0049] Figure 13 A three-dimensional structural diagram of a limiting component in the present invention;

[0050] Figure 14 It is a cross-sectional three-dimensional structural diagram of the limiting component located at the auxiliary limiting member in the present invention.

[0051] In the figure: 1. Support mechanism; 11. Support plate; 12. Elevator; 13. Elevator 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

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0053] Embodiment 1, a general pipe processing welding device, including 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.

[0054] 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 6 The lifting platform 13 is fixed to the support structure 11 by the lifting mechanism 11, and the lifting mechanism 13 is fixed to the support structure 11 by the lifting mechanism 11. The lifting platform 13 is fixed to the support structure 11 by the lifting mechanism 11, and the lifting mechanism 13 is fixed to the support structure 11 by the lifting mechanism 11. The lifting platform 13 is fixed to the support structure 11 by the lifting mechanism 11, and the lifting mechanism 13 is fixed to the support structure 11 by the lifting mechanism 11.

[0055] like Figure 1-Figure 2 The support mechanism 1 is provided with a working mechanism 2 on the outside, and the working mechanism 2 corresponds to the annular seam position of the workpiece 3 and is used to perform welding operations 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 provided at the middle of the top of the working column 21, and the welding machine 22 corresponds to the circumferential seam. The welding machine 22 is an arc welding machine, thereby ensuring the accuracy of the circumferential seam welded by the welding machine 22.

[0056] like Figure 1-Figure 5The interface between 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 movable plate 46 and a limit assembly 5, specifically:

[0057] like Figures 8-12 The number of fixing parts 41 is two, and one fixing part 41 is correspondingly provided in one workpiece 3. The mutually fitting ends of the two fixing parts 41 are connected by a fixing bolt 40, and the two fixing parts 41 are concentrically arranged, so that the two fixing parts 41 and the fixing bolts 40 are assembled, which facilitates the disassembly and replacement of the two fixing parts 41 according to actual needs. If the diameters of the two fixing parts 41 are different, the fixing part 41 suitable for the size of the corresponding workpiece 3 can be replaced as needed.

[0058] like Figure 10 、 Figure 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 air pump 42 setting. Figure 5 An arc groove is provided at the end of the fixing part 41 that fits with the other fixing part 41, and the arc grooves of the two fixing parts 41 can be spliced ​​into a circular cavity. The end walls of the two fixing parts 41 located in the inner circle of the circular cavity fit together, and the end walls of the two fixing parts 41 located in the outer circle of the circular cavity do not fit together, 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, thereby realizing 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 to the circular cavity, and the other air port is connected to 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 component 5.

[0059] like Figure 10 、 Figure 12 A fixing plate 43 is fixedly sleeved in the fixing groove 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 chamber, which can provide space for gathering and dispersing gas. Specifically, if the air pump 42 draws gas from the inside, the fixing chamber 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 air pump 42 draws gas from the outside, the fixing chamber 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.

[0060] like Figure 10 、 Figure 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 of the fixed shell 44. The transverse hole of the fixed plate 43 is connected to the transverse cavity of the fixed shell 44, which facilitates the movement of gas in the transverse cavity and transverse hole under the action of external force.

[0061] like Figure 10 、 Figure 12 When the air pump 42 is sucking air, the gas in the transverse cavity of the fixed shell 44 is reduced, and the fixed rod 45 is acted upon by the gas suction to overcome the tension of the fixed spring and move closer to the air pump 42, thereby driving the movable plate 46 to move in the same direction, thereby pushing the six limiting components 5 to move obliquely outward, so that the limiting components 5 are no longer subject to the thrust of the movable plate 46 and move obliquely inward, so that the limiting components 5 no longer conflict with the workpiece 3.

[0062] like Figures 8-13 , the non-fitting ends of the two fixing members 41 are obliquely provided with a set of limiting components 5, the number of a 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 to achieve the concentricity of the inner diameters of the two workpieces 3. Specifically, the limiting component 5 includes a main limiting member 51, such as Figure 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. The outer wall of the main limit member 51 area sleeved on the fixing member 41 is provided with a limit strip, 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. The 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 on a limit spring, one end of the limit spring is fixedly connected to the bottom of the main limit member 51, and the other end of the limit spring is fixedly connected to the end of the fixing member 41. When the vacuum pump 42 is pumping air, the main limit member 51 is subjected to thrust and overcomes the action of the limit spring and moves obliquely outward. When the vacuum pump 42 is inhaling air, the main limit member 51 is acted upon by the limit spring and moves obliquely inward.

[0063] In the second embodiment, based on the first embodiment, the limiting assembly 5 further includes an auxiliary limiting member 52 and a limiting tube 53, such as Figure 3-Figure 4 、 Figure 13-14 , one 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 used to enhance the stability of the connection between the limiting assembly 5 and the workpiece 3, and prevent the limiting assembly 5 from reducing the limiting and fixing effect of the workpiece 3 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 preparation for further enhancing 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, prompting the auxiliary limiter 52 to no longer produce an adsorption effect on the workpiece 3, so that the auxiliary limiter 52 does not fit the workpiece 3, making it easier for the fixing mechanism 4 to be removed from the workpiece 3.

[0064] like Figure 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 is located near the fixing mechanism 4. The top membrane 522 is made of a flexible material and is located near the workpiece 3. A number of air holes are provided 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 offsetting during welding and affecting the limiting support for the workpiece 3.

[0065] The working principle of the method of use of the present invention is as follows:

[0066] 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 air pump 42 in the fixing piece 41 is started to put it in an exhaust state, so that the gas in the transverse cavity of the fixing shell 44 is extracted and discharged into the circular cavity through the air pump 42. During this process, the fixing shell 44 pushes the fixing rod 45 to move toward the air 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 inside 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 realizing the concentricity of the inner diameters of the two workpieces 3, enhancing the efficiency and effect of the circumferential seam docking of the workpieces 3, and improving the welding quality. In addition, due to the shape and position design of the two sets of limiting components 5, the effective limiting components 5 will apply opposite thrusts when they come into conflict with the workpiece 3, making the circumferential seam docking of the two workpieces 3 tighter, further improving the welding quality.

[0067] During the vacuum operation of the vacuum pump 42, since the main limiter 51 is in contact with the inner wall of the workpiece 3 and the auxiliary limiter 52 is in contact with the workpiece 3, when the vacuum pump 42 extracts the gas in the auxiliary limiter 52 through the limiter tube 53, the auxiliary limiter 52 can always generate suction on the inner wall of the workpiece 3 through the air hole, effectively enhancing the connection stability between the limiter assembly 5 and the workpiece 3.

[0068] 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 support 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.

[0069] 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 and realizing 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 the working process, which effectively ensures the stability of the limit component 5 against the workpiece 3, prevents the concentricity of the inner diameter between the two due to the rotation of the workpiece 3, and can continuously cool the inner ring of the annular seam.

[0070] After 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, and then 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.

[0071] 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, the 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.

[0072] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily 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 is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A universal 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 fitted together, and the interface area of ​​the two workpieces (3) is called an annular seam; A fixing mechanism (4), wherein the interfaces of the two workpieces (3) are internally sleeved with a fixing mechanism (4), for controlling the inner diameters of the two workpieces (3) to be concentric, the fixing mechanism (4) comprising a fixing member (41) and a limiting assembly (5), the number of the fixing members (41) being two, and a corresponding fixing member (41) being provided in one workpiece (3), the mutually fitting ends of the two fixing members (41) being connected by a fixing bolt (40), and the two fixing members (41) being concentrically provided, the non-fitting ends of the two fixing members (41) being obliquely provided with a group of limiting assemblies (5), the number of a group of limiting assemblies (5) being six, and being evenly provided around the fixing member (41), and the two groups of limiting assemblies (5) on the fixing mechanism (4) being synchronously controlled to respectively contact the inner walls of the two workpieces (3), thereby achieving the concentricity of the inner diameters of the two workpieces (3); The fixing mechanism (4) further comprises: An air pump (42), 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 position 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) 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 in the inner circle of the circular cavity fit together, and the end walls of the two fixing members (41) located in the outer circle of the circular cavity do not fit 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 the fixing groove 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 opened in the middle portion of the fixed shell (44), and the transverse hole of the fixed plate (43) is communicated 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); The limiting component (5) includes: A main limiting member (51), the main limiting member (51) is in a "J" shape, and the main limiting member (51) is obliquely movably sleeved on the fixing member (41), and a limiting strip is provided on the outer wall of the main limiting member (51) region sleeved on the fixing member (41), and one end of the main limiting member (51) located outside the end of the fixing member (41) contacts the movable plate (46), and the outer part of the main limiting member (51) is movably sleeved with a limiting spring, one end of the limiting spring is fixedly connected to the bottom of the main limiting member (51), and the other end of the limiting spring is fixedly connected to the end of the fixing member (41); An auxiliary limiting member (52) is fixedly sleeved on one end of the main limiting member (51) that contacts the workpiece (3), the auxiliary limiting member (52) is arc-shaped, and the outer wall of the auxiliary limiting member (52) does not completely fit 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 in communication 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 in communication with the fixing cavity; 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). A plurality of air holes are provided on the top membrane (522).

2. The universal pipe processing welding device according to claim 1, characterized in that: Also includes: A support mechanism (1) is provided 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) is provided outside the support 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).

3. The universal pipe processing welding device according to claim 2, characterized in that: The supporting mechanism (1) comprises: Support plates (11), wherein the number of the support plates (11) is two, and the two support plates (11) are arranged in parallel; Elevators (12), wherein the support plate (11) is fixedly provided with elevators (12), the number of the elevators (12) is four groups, and the number of elevators (12) in each group is two, the four groups of telescopic elevators (12) are evenly arranged horizontally on the support plate (11), and one group of elevators (12) is arranged in parallel; A lifting plate (13), the top end of each group of elevators (12) is fixedly connected to a lifting plate (13); Roller racks (14) are provided on both sides of the top end of the lifting plate (13).

4. The universal pipe processing welding device according to claim 2, 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) is provided at the middle of the top end of the working column (21), and the welding machine (22) corresponds to the annular seam. The welding machine (22) is an arc welding machine.

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