Automatic pipe end welding device

Abstract

The application discloses a pipe head automatic welding device and relates to the technical field of pipe head welding.The device comprises a supporting mechanism, a table body, a box body fixed at the bottom of the table body, a cover body and a ring plate fixed at the top of the table body, and the ring plate is located between the cover bodies;a center clamping mechanism is installed on the supporting mechanism and comprises a circular shell rotating on the table body, a rotating disc fixed on the circular shell, and a guide groove formed in the bottom of the circular shell.The center clamping mechanism can clamp the pipe head in the center under the cooperation of the supporting mechanism, and manual clamping operation is not needed;the pipe head and the welding pipe can be placed in butt joint to realize automatic center clamping;the conveying and polishing mechanism can realize mechanical polishing operation and cooling of the welding position before and after welding under the cooperation of the cooling mechanism, the quality of the welding seam is improved, the risk of incomplete fusion is reduced, stress concentration and fatigue cracking are reduced, and the failure of subsequent corrosion and coating is avoided.

Description

Technical Field

[0001] This invention relates to the field of pipe end welding technology, and in particular to an automatic pipe end welding device. Background Technology

[0002] Pipe end arc welding equipment mainly refers to automated arc welding equipment used for pipe ends (including pipe-to-pipe connections, pipe-to-flange, elbow and other pipe fitting connections), especially with argon arc welding as the mainstream technology, which has the characteristics of high welding precision, stable quality and wide applicability.

[0003] However, in practical applications, some problems remain unresolved. The following are some common issues with automatic pipe welding devices: In most cases, mechanical grinding of the weld joint cannot be performed before or after welding. If grinding is not performed before welding, oil, rust, or oxide layers will not be removed from the weld joint. These contaminants will cause defects such as porosity and slag inclusions at high temperatures, reducing the density and strength of the weld and increasing the risk of incomplete fusion. If grinding is not performed after welding, the weld reinforcement or uneven surface will form stress concentration points. Under pipeline pressure or vibration conditions, fatigue cracks are easily triggered and propagated. It is difficult to form a uniform anti-corrosion coating on a rough weld surface, resulting in reduced coating adhesion and accelerated local corrosion. Even if manual grinding is performed in a few cases, the efficiency is low and the quality is poor. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned automatic pipe head welding devices, the present invention is proposed.

[0005] Therefore, the problem to be solved by this invention is how to address the issue that in most cases, mechanical grinding of the weld joint cannot be performed before or after welding. If grinding is not performed before welding, contaminants will produce defects such as porosity and slag inclusions at high temperatures, reducing the density and strength of the weld and increasing the risk of incomplete fusion. If grinding is not performed after welding, the weld reinforcement or uneven surface will form stress concentration points, which will easily lead to fatigue cracks and their propagation. Furthermore, it will be difficult to form a uniform anti-corrosion coating on the rough weld surface, resulting in reduced coating adhesion.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automatic pipe head welding device, comprising,

[0007] The support mechanism includes a platform, a box is fixed to the bottom of the platform, and a cover and a ring plate are fixed to the top of the platform, with the ring plate located between the covers;

[0008] A central clamping mechanism is installed on a support mechanism, including a circular shell that rotates on a platform. A turntable is fixed on the circular shell, and a guide groove is provided at its bottom. A trigger is installed on the circular shell and the box body, and an airbag is installed at its upper end. A linkage is installed on the trigger and the platform body, and a clamping member is installed on the cover body, which cooperates with the linkage.

[0009] A conveying and grinding mechanism is installed on a support mechanism and a cylindrical shell, including a transmission component installed on a ring plate and a cover. A linkage component and an elastic component are respectively installed on the cover. The linkage component is disposed on the transmission component and the elastic component. A driving component is installed on the elastic component, and a grinding wheel, a rubber wheel and a control rod are respectively installed on it.

[0010] A cooling mechanism, mounted on a platform, includes a switching component fixed to the platform and connected to a connecting shell. One side of the connecting shell is connected to a bent pipe, and one end is connected to a nozzle; and...

[0011] The welding mechanism is fixed to the platform.

[0012] In a preferred embodiment of the automatic pipe welding device of the present invention, the triggering element includes a liquid tank fixed to the inner wall of the housing, a piston sliding inside the liquid tank, a vertical tube sliding on the liquid tank, the lower end of which is rotatably connected to the piston, the upper end of which extends through the circular shell to the top and is fixedly connected to a circular block, an airbag is sleeved on the upper end of the vertical tube, and a support ring is fixed at its bottom, the support ring is fixed to the upper end of the circular shell, the bottom of the airbag is connected to a vertical cylinder, a short tube is connected to the vertical tube, and its upper end is inserted into the vertical cylinder, a spring is sleeved on the lower surface of the vertical tube, a limit plate is fixed on the vertical tube and slides on the circular shell.

[0013] In a preferred embodiment of the automatic pipe welding device of the present invention, the linkage includes a connecting plate sleeved on the surface of the vertical pipe, a vertical plate sliding on the platform and its lower end fixed to the connecting plate, a guide plate fixed at the upper end of the vertical plate, a guide hole provided on the guide plate, a guide post sliding in the guide hole and fixed to the clamping member, a guide post fixed on the vertical plate, a guide plate sliding on the vertical plate and fixed to the surface of the elastic member, a guide hole provided on the guide plate, and a guide post sliding in the guide hole.

[0014] As a preferred embodiment of the automatic pipe head welding device of the present invention, the clamping member includes a square tube that slides on the cover, a square plate that slides inside one end of the square tube, and a guide post that is fixedly connected to the other end. An arc plate is fixed to one end of the square plate, a rubber pad is provided on one side of the arc plate, an arc plate is provided on one side of the rubber pad, and a ball bearing is embedded on one side of the arc plate.

[0015] In a preferred embodiment of the automatic pipe welding device of the present invention, the transmission component includes a movable plate that slides on the cover and the ring plate, a movable column is fixed on the movable plate, a rotating ring is rotatably mounted on the platform and sleeved on the outer surface of the circular shell, a guide frame is fixed on the outer surface of the rotating ring, and the lower end of the movable column slides in it, and the upper end of one of the two movable columns slides in the guide groove, while the upper end of the other column does not slide in it.

[0016] In a preferred embodiment of the automatic pipe welding device of the present invention, the linkage component includes a transmission module and a flipping module, both of which are installed inside the housing and cooperate with each other. The transmission module is disposed on a movable plate and includes a crossbar fixedly connected to the inner wall of the housing. A movable plate is rotatably mounted on the crossbar. A through hole one and a through hole two are respectively opened at both ends of the movable plate. A cylinder one is fixed on the movable plate and slides in the through hole one. A cylinder two is fixed on the flipping module and slides in the through hole two.

[0017] In a preferred embodiment of the automatic pipe welding device of the present invention, the flipping module is mounted on an elastic element and includes a guide rod fixed to the inner wall of the cover. A sliding sleeve is fitted on the guide rod, and a cylinder is fixed to one side thereon. A short column is fixed to the top of the sliding sleeve. A rotating cylinder is rotatably mounted on one side of the cover and is fitted onto the surface of the elastic element. A driving groove is opened on the outer surface of the rotating cylinder, and the upper end of the short column slides inside it. A limit strip is fixed to the inner wall of the rotating cylinder.

[0018] In a preferred embodiment of the automatic pipe welding device of the present invention, the elastic element includes a long column that slides inside the rotating drum and is fixed to the guide plate II. A block slides inside the long column. A round rod slides at one end of the long column. One end of the round rod extends into the long column and is fixed to the block, while the other end is fixed to the driving component. A limiting groove is formed on the long column, and a limiting strip slides within it. A spring II is fixed between the surface of the block and the inner wall of the long column.

[0019] In a preferred embodiment of the automatic pipe welding device of the present invention, the driving component includes a U-shaped plate fixed to one end of a round rod, a motor fixed on the U-shaped plate, a rotating tube rotating on the U-shaped plate with one end fixed to the output shaft of the motor, a grinding wheel and a rubber wheel both sleeved on the outer surface of the rotating tube, a connecting pipe connecting the rotating tube and the rubber wheel, a connecting pipe fixed on the U-shaped plate with one end rotatably connected to the rotating tube and the other end connected to a flexible hose, the lower end of the flexible hose penetrating the platform and connecting to the liquid tank, and a control rod fixedly connected to one side of the U-shaped plate.

[0020] In a preferred embodiment of the automatic pipe welding device of the present invention, the switching component includes a valve housing fixed on the platform and communicating with the connecting shell. A valve block slides inside the valve housing. The valve block has two circular holes, a first and a second. The valve housing has two circular holes, a third and a fourth. The first and third circular holes cooperate with each other, and the second and fourth circular holes cooperate with each other. A positioning groove is provided inside the valve housing. A positioning block is fixed on the valve block and slides in the positioning groove. A spring is fixed between the surface of the positioning block and the inner wall of the positioning groove.

[0021] The beneficial effects of this invention are as follows: With the cooperation of the supporting mechanism, the centering clamping mechanism can clamp and center the welded pipe by its own weight, eliminating the need for manual clamping. Simply placing the pipe head and the welded pipe together will achieve automatic centering clamping. With the cooperation of the conveying and grinding mechanism and the cooling mechanism, mechanical grinding and cooling of the welded area can be performed before and after welding, improving the quality of the weld, reducing the risk of incomplete fusion, reducing stress concentration and fatigue cracking, and preventing the failure of subsequent anti-corrosion and coating. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 The overall three-dimensional structure of the automatic pipe head welding device Figure 1 .

[0024] Figure 2 The overall three-dimensional structure of the automatic pipe head welding device Figure 2 .

[0025] Figure 3 This is a three-dimensional structural diagram of the automatic pipe head welding device before welding.

[0026] Figure 4 This is a partial sectional perspective view of the automatic pipe head welding device.

[0027] Figure 5 Automatic pipe head welding device Figure 4 Enlarged view of region A in the middle.

[0028] Figure 6 Automatic pipe head welding device Figure 4 Enlarged view of region B in the middle.

[0029] Figure 7 Automatic pipe head welding device Figure 4 Enlarged view of region C.

[0030] Figure 8 This is a partial sectional plan view of the automatic pipe head welding device.

[0031] Figure 9 Automatic pipe head welding device Figure 8 Enlarged view of region D in the middle.

[0032] Figure 10 Automatic pipe head welding device Figure 8 Enlarged view of region E in the middle.

[0033] Figure 11 Automatic pipe head welding device Figure 8 Enlarged view of the F region.

[0034] Figure 12 This is a three-dimensional view of the ring plate and connecting plate structure of the automatic pipe head welding device.

[0035] Figure 13 This is a plan view of the ring plate and moving plate structure of the automatic pipe head welding device.

[0036] Figure 14 This is a sectional plan view of the turntable structure of the automatic pipe welding device.

[0037] Figure 15 This is a partial sectional perspective view of the clamping structure of the automatic pipe welding device.

[0038] Figure 16 A three-dimensional view of the grinding wheel, rubber wheel, and control rod structure of the automatic pipe welding device.

[0039] Figure 17 Automatic pipe head welding device Figure 16 Enlarged view of the G region.

[0040] Figure 18 This is a partial sectional perspective view of the elastic and driving components of the automatic pipe welding device.

[0041] Figure 19 This is a partial 3D view of the cooling mechanism of the automatic pipe head welding device.

[0042] Figure 20 This is a partial sectional perspective view of the switching component structure of the automatic pipe head welding device.

[0043] Figure 21 This is a partial sectional perspective view of the valve block and valve shell structure of the automatic pipe welding device.

[0044] In the diagram: 1. Support mechanism; 11. Platform; 12. Box; 13. Cover; 14. Ring plate; 15. Ball bearing 1; 2. Centered clamping mechanism; 21. Circular shell; 22. Turntable; 23. Guide groove; 24. Trigger; 25. Airbag; 26. Linkage component; 27. Clamping component; 28. Anti-slip pad; 3. Conveying and grinding mechanism; 31. Transmission component; 32. Linkage assembly; 33. Elastic component; 34. Drive component; 35. Grinding wheel; 36. Rubber wheel; 37. Control lever; 4. Cooling mechanism; 41. Switching component; 42. Connecting shell; 43. Bend; 44. Nozzle; 45. Air pipe; 46. Water pipe; 5. Welding mechanism; 24-1. Liquid tank; 24-2 24-1 Piston; 24-2 Vertical tube; 24-3 Slider; 24-4 Round block; 24-5 Support ring; 24-6 Vertical cylinder; 24-8 Short tube; 24-9 Spring 1; 24-10 Limiting plate; 24-11 Support plate; 24-12 Fixing bolt; 24-13 Slide groove; 26-1 Connecting plate; 26-2 Vertical plate; 26-3 Guide plate 1; 26-4 Guide hole 1; 26-5 Guide post 1; 26-6 Guide post 2; 26-7 Guide plate 2; 26-8 Guide hole 2; 27-1 Square tube; 27-2 Square plate; 27-3 Arc plate 1; 27-4 Rubber pad; 27-5 Arc plate 2; 27-6 Ball bearing 2; 2 7-7 Fastening bolt; 27-8 Positioning bolt; 27-9 Snap ring; 31-1 Moving plate; 31-2 Moving column; 31-3 Rotating ring; 31-4 Guide frame; 32-1 Transmission module; 32-11 Crossbar; 32-12 Movable plate; 32-13 Through hole one; 32-14 Through hole two; 32-15 Cylindrical one; 32-16 Cylindrical two; 32-2 Flipping module; 32-21 Guide rod; 32-22 Sliding sleeve; 32-23 Short column; 32-24 Rotating cylinder; 32-25 Drive groove; 32-26 Limiting strip; 33-1 Long column; 33-2 Square block; 33-3 Round rod; 33-4 Limiting... Positioning groove; 33-5, Spring 2; 34-1, U-shaped plate; 34-2, Motor; 34-3, Rotary pipe; 34-4, Connecting pipe; 34-5, Connecting pipe; 34-6, Flexible hose; 41-1, Valve body; 41-2, Spring 3; 41-3, Valve block; 41-4, Round hole 1; 41-5, Round hole 2; 41-6, Round hole 3; 41-7, Round hole 4; 41-8, Positioning groove; 41-9, Positioning block; 23-1, Groove 1; 23-2, Groove 2; 23-3, Groove 3; 23-4, Groove 4; 23-5, Groove 5; 23-6, Groove 6; 32-25-1, Groove hole 1; 32-25-2, Groove hole 2; 32-25-3, Groove hole 3. Detailed Implementation

[0045] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0046] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0047] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0048] Example 1

[0049] Reference Figures 1 to 8 This is the first embodiment of the present invention. This embodiment provides an automatic pipe head welding device, which includes a support mechanism 1, a centering clamping mechanism 2, a conveying and grinding mechanism 3, a cooling mechanism 4, and a welding mechanism 5. With the cooperation of the support mechanism 1, the centering clamping mechanism 2 can clamp and center the pipe head by its own weight, eliminating the need for manual clamping. With the cooperation of the cooling mechanism 4, the conveying and grinding mechanism 3 can perform mechanical grinding and cooling operations on the weld before and after welding, thereby improving the quality of the weld.

[0050] Specifically, the support mechanism 1 includes a platform 11, a box 12 fixed to the bottom of the platform 11, a cover 13 and an annular plate 14 fixed to the top of the platform 11 respectively, and the annular plate 14 is located between the covers 13. There are two covers 13, which are symmetrically arranged on both sides of the top of the platform 11. The box 12, the platform 11 and the annular plate 14 provide installation positions for the corresponding structures.

[0051] Specifically, the central clamping mechanism 2 is installed on the support mechanism 1, including a circular shell 21 that rotates on the platform 11. A turntable 22 is fixed on the circular shell 21, and a guide groove 23 is provided at its bottom. The circular shell 21 is rotatably connected to the platform 11 through a bearing. The turntable 22 is fixedly sleeved on the outer surface of the circular shell 21. The tube head can be easily placed on it for support through the turntable 22. A trigger element 24 is installed on the circular shell 21 and the box 12, and an airbag 25 is installed at its upper end.

[0052] With the airbag 25 in place, after the tube head is fitted onto the round shell 21 and placed on the turntable 22, one end of the welded tube is gradually inserted into the tube head. Due to the effect of its gravity on the trigger 24, the airbag 25 expands, thereby exerting force on the inner surface of the tube head. Due to the circumferential expansion pushing action, the tube head is centered and coaxial with the round shell 21, and the tube head is fixed as it expands, so that the tube head and the welded tube can rotate smoothly with the turntable 22 during subsequent driving. The centering of the tube head can also enable the welded tube to be initially positioned.

[0053] The trigger 24 and the platform 11 are equipped with a linkage 26, and the cover 13 is equipped with a clamping member 27, which cooperates with the linkage 26. Through the setting of the clamping member 27, when the trigger 24 is running, it can act on the linkage 26, thereby causing the two sets of clamping members 27 on the two covers 13 to move closer to each other, thereby clamping and pushing the welding pipe on the pipe head to center it, and thus aligning it with the pipe head, so that the position to be welded is aligned, maintaining the quality of subsequent welding. In this fixed centering process, no manual clamping operation is required. It is only necessary to place the pipe head and the welding pipe to achieve automatic centering and clamping.

[0054] Specifically, the conveying and grinding mechanism 3 is installed on the support mechanism 1 and the circular shell 21. It includes a transmission component 31 installed on the ring plate 14 and the cover 13. Through the setting of the transmission component 31, when the turntable 22 rotates and the guide groove 23 on it rotates, it can drive the linkage component 32, thereby causing the two elastic components 33 to rotate and switch, thus acting on the drive component 34 to cause the two grinding wheels 35 and rubber wheels 36 on both sides to rotate and switch. The linkage component 32 and the elastic component 33 are respectively installed on the cover 13. The linkage component 32 is set on the transmission component 31 and the elastic component 33. The drive component 34 is installed on the elastic component 33, and the grinding wheel 35, the rubber wheel 36 and the control rod 37 are respectively installed on it.

[0055] The elastic element 33 drives the transmission element 31 during operation, thereby moving the drive element 34 and its grinding wheel 35 and rubber wheel 36 to act on the welded pipe, playing a secondary centering and limiting role. The grinding wheels 35 and rubber wheels 36 on both sides of the drive element 34 are staggered in a cross shape. When the grinding wheel 35 and rubber wheel 36 on one side rotate, they drive the welded pipe and pipe head to be transmitted. The grinding wheel 35 on the other side rotates to grind the welded joint of the welded pipe and pipe head, which can grind and polish the rusted area and improve the quality of subsequent welding. At this time, the rubber wheel 36 does not contact the welded pipe and pipe head. When switching, the functions of both sides also switch. At this time, the welding mechanism 5 welds the welded joint of the transmitted rotating welded pipe and pipe head. With the transmission cooling mechanism 4, the welded area is cooled down, and the grinding wheel 35 grinds the cooled welded area.

[0056] With the elastic element 33 in place, the transmission element 31 acts on it to push it to move, so that the grinding wheel 35 and rubber wheel 36 on the drive element 34 come into contact with the welded pipe and pipe head. Under the action of the elastic element 33, the transmission element 31 can still run. At this time, the elastic element 33 is compressed, so that the grinding wheel 35 and rubber wheel 36 exert elastic action on the welded pipe and pipe head. When the grinding wheel 35 and rubber wheel 36 on both sides rotate and switch, their compression can provide space for rotation and switching without affecting normal switching. With the control rod 37 in place, when it rotates with the drive element 34, it acts on the switching element 41 on the cooling mechanism 4 to switch the air output of the nozzle 44 to atomized water spray, cool the position after welding, and at the same time play a certain role in dust settling.

[0057] Specifically, the cooling mechanism 4 is installed on the platform 11, including a switching component 41 fixed on the platform 11 and connected to a connecting shell 42. One side of the connecting shell 42 is connected to a bent pipe 43, and one end of the pipe is connected to a nozzle 44. Due to the setting of the switching component 41, the control rod 37 does not act on it during grinding. At this time, the nozzle 44 sprays gas, which can blow away the grinding debris attached to the joint during grinding, ensuring the quality of welding during subsequent welding.

[0058] When the control lever 37 rotates to act on the switching component 41, the nozzle 44 sprays atomized water, which can cool the welded joint and facilitate the grinding wheel 35 to grind the cooled welded joint. This prevents grinding before the welded joint has cooled down, which would affect the quality of the weld. The nozzle 44 is a gas-liquid dual-purpose nozzle, which is existing technology. The working principle of this part is also existing technology, which can be clearly understood by those skilled in the art, and will not be described in detail here.

[0059] Specifically, the welding mechanism 5 is fixed on the platform 11. The welding mechanism 5 is an arc welding device. When welding is required on the pipe and pipe head, it can approach to perform the welding operation and automatically move away after the welding is completed, thus realizing automatic welding. This is existing technology. The working principle of this part is also existing technology, which can be clearly understood by those skilled in the art, and will not be described in detail here.

[0060] Example 2

[0061] Reference Figures 2 to 15 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0062] Specifically, the trigger 24 includes a liquid tank 24-1 fixed to the inner wall of the housing 12, a piston 24-2 sliding inside the liquid tank 24-1, the liquid tank 24-1 being filled with hydraulic oil, a sealing ring being provided between the piston 24-2 and the liquid tank 24-1 and fitted onto the surface of the piston 24-2 to prevent hydraulic oil from leaking from the gap between them, a vertical tube 24-3 sliding on the liquid tank 24-1, the lower end of which is rotatably connected to the piston 24-2, and the upper end of which extends through the circular shell 21 to the top and is fixedly connected to a circular block 24-5.

[0063] The vertical tube 24-3 is rotatably connected to the piston 24-2 through a sealed bearing. With this design, the piston 24-2 can be driven to move up and down when the vertical tube 24-3 moves up and down. At the same time, the vertical tube 24-3 does not affect the connection between it and the liquid tank 24-1 when it rotates, so that the hydraulic oil can pass smoothly through the vertical tube 24-3. The air bag 25 is sleeved on the upper end of the vertical tube 24-3, and a support ring 24-6 is fixed at its bottom. The support ring 24-6 is fixed to the upper end of the round shell 21.

[0064] By setting the circular block 24-5, when the welded pipe is inserted into the pipe head, it is subjected to force, causing the vertical pipe 24-3, the connecting plate 26-1 and the piston 24-2 to press down, thereby allowing the hydraulic oil in the liquid tank 24-1 to enter the airbag 25 through the vertical pipe 24-3, the vertical cylinder 24-7 and the short pipe 24-8, causing the airbag 25 to expand and press against the pipe head. The support ring 24-6 is fixedly connected to the circular shell 21 through the support rod, and the support ring 24-6 plays a supporting role when the airbag 25 is installed. The inner surface of the airbag 25 is slidably connected to the outer surface of the vertical pipe 24-3.

[0065] The bottom of the airbag 25 is connected to a vertical cylinder 24-7, and a short pipe 24-8 is connected to the vertical tube 24-3, with its upper end inserted into the vertical cylinder 24-7. The vertical tube 24-3 and the short pipe 24-8 keep the airbag 25 and the vertical tube 24-3 connected. At the same time, when the vertical tube 24-3 moves up and down and the airbag 25 does not move, the upper end of the short pipe 24-8 can move inside the lower end of the vertical tube 24-3, and the connection can still be maintained. A sealing ring is provided between the vertical cylinder 24-7 and the short pipe 24-8 and is embedded in the inner wall of the lower end of the vertical cylinder 24-7 to prevent hydraulic oil from leaking from the gap between them.

[0066] A spring 24-9 is fitted on the lower surface of the vertical tube 24-3. By setting the spring 24-9, when the vertical tube 24-3 is pressed down by the welding tube along with the round block 24-5, the round block 24-5, the vertical tube 24-3, the connecting plate 26-1 and the piston 24-2 move downward, and the spring 24-9 is compressed. When the welding tube is removed after welding, it provides a force for the reset of the corresponding structure. A limit plate 24-10 is fixed on the vertical tube 24-3 and slides on the round shell 21. Two limit plates 24-10 are set on the vertical tube 24-3. By setting the limit plates 24-10, when the turntable 22 rotates and drives the round shell 21 to rotate, it can drive the liquid removal tank 24-1, the piston 24-2 and the trigger 24 of the spring 24-9 to rotate.

[0067] The linkage 26 includes a connecting plate 26-1 sleeved on the surface of the vertical tube 24-3. The connecting plate 26-1 is rotatably connected to the vertical tube 24-3 through a bearing. When the vertical tube 24-3 moves up and down, it can drive the connecting plate 26-1 to move up and down. At the same time, the connecting plate 26-1 does not affect the rotation of the vertical tube 24-3. A vertical plate 26-2 slides on the platform 11 and its lower end is fixed to the connecting plate 26-1. Two vertical plates 26-2 are provided on one connecting plate 26-1 and are symmetrically distributed at both ends of the connecting plate 26-1. The vertical plates 26-2 pass through the platform 11 and are slidably connected to it.

[0068] A guide plate 26-3 is fixed to the upper end of the vertical plate 26-2. A guide hole 26-4 is provided on the guide plate 26-3. A guide post 26-5 slides in the guide hole 26-4 and is fixed on the clamping member 27. By setting the guide hole 26-4 on the guide plate 26-3, when the guide plate 26-3 moves up and down, the guide post 26-5 can move in it, thereby causing the two sets of clamping members 27 on both sides to move closer or further apart, so as to realize the centered clamping or release of the welded pipe.

[0069] A guide post 26-6 is fixed on the vertical plate 26-2, and a guide plate 26-7 slides on the vertical plate 26-2 and is fixed to the surface of the elastic member 33. A guide hole 26-8 is provided on the guide plate 26-7, and the guide post 26-6 slides in it. Through the setting of the guide hole 26-8 on the guide plate 26-7, when the guide post 26-6 moves up and down with the vertical plate 26-2, the guide post 26-6 can move in the guide hole 26-8, thereby causing the guide plate 26-7 to move, thereby enabling the elastic member 33 to move and causing the elastic member 33 to act on the driving member 34.

[0070] The clamping component 27 includes a square tube 27-1 that slides on the cover 13. The square tube 27-1 passes through the cover 13 and is slidably connected to it. A square plate 27-2 slides inside one end of the square tube 27-1, and the other end is fixedly connected to the guide post 26-5. An arc plate 27-3 is fixed to one end of the square plate 27-2. A rubber pad 27-4 is provided on one side of the arc plate 27-3, and an arc plate 27-5 is provided on one side of the rubber pad 27-4. Due to the arc shape of the arc plate 27-5, the ball bearing 27-6 installed on it can better contact the surface of the welded pipe when the arc plate 27-5 moves.

[0071] A number of ball bearings 27-6 are embedded on one side of the arc-shaped plate 27-5. The ball bearings 27-6 are arranged in such a way that when they move with the arc-shaped plate 27-5 and come into contact with the welding pipe, they can clamp and center it. Furthermore, during the subsequent rotation, grinding, and welding of the welding pipe and pipe head, they can rotate smoothly with minimal resistance. With the rubber pad 27-4, after the ball bearings 27-6 on the arc-shaped plate 27-5 come into contact with the welding pipe and are clamped and centered, they can be slightly compressed as the arc-shaped plate 27-3 moves, thus avoiding hard contact that could damage the device.

[0072] Example 3

[0073] Reference Figures 4 to 17 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0074] Specifically, the transmission component 31 includes a movable plate 31-1 that slides on the cover 13 and the ring plate 14. The movable plate 31-1 passes through the cover 13 and the ring plate 14 and is slidably connected to them. A movable column 31-2 is fixed on the movable plate 31-1. The movable column 31-2 passes through one end of the movable plate 31-1 and is fixedly connected to it. A rotating ring 31-3 is rotatably mounted on the platform 11 and is sleeved on the outer surface of the circular shell 21. A guide frame 31-4 is fixed on the outer surface of the rotating ring 31-3, and the lower end of the movable column 31-2 slides inside it. The rotating ring 31-3 is rotatably connected to the platform 11 through a bearing. Two guide frames 31-4 are fixedly connected to one rotating ring 31-3. The upper end of one of the two movable columns 31-2 slides inside the guide groove 23, and the upper end of the other does not slide inside it.

[0075] With the guide frame 31-4 and the moving column 31-2 in place, when the moving column 31-2 on one side moves and drives the moving plate 31-1 on the other side to move, it can drive the moving plate 31-1 on the other side to move, so that the moving plates 31-1 on both sides move closer or further apart. Then, the linkage components 32 on both sides act on the elastic members 33 and the driving members 34 on both sides, so that the corresponding grinding wheels 35 and rubber wheels 36 on both sides switch their states.

[0076] With the setting of the limiting groove 33-4, when the rubber wheel 36 on one side rotates to drive the welding pipe and pipe head to rotate, the turntable 22 at its bottom will rotate together. The grinding wheel 35 on the other side grinds the welding area. After rotating more than one revolution, the guide groove 23 acts on the transmission component 31, and then the elastic component 33 and the driving component 34 are rotated through the linkage component 32, thereby switching the state of the grinding wheel 35 and the rubber wheel 36 on both sides. The system switches from conveying on one side and grinding on the other side to grinding on one side and conveying on the other side. At this time, the welding device performs welding operation on the welding pipe and pipe head that need to be conveyed.

[0077] After welding is completed, the welding torch on the welding mechanism 5 automatically moves away and controls the motor 34-2 to run in the opposite direction. The turntable 22 and the guide groove 23 rotate in the opposite direction according to the transmission direction. During this process, the grinding wheels 35 and rubber wheels 36 on both sides still switch, but this does not affect the grinding wheels 35 from grinding and polishing the welded area again after cooling.

[0078] The linkage component 32 includes a transmission module 32-1 and a flipping module 32-2. Both the transmission module 32-1 and the flipping module 32-2 are installed inside the cover 13 and cooperate with each other. With the cooperation of the transmission module 32-1, the flipping module 32-2 can drive the elastic members 33 on both sides to rotate under the action of the moving plate 31-1, thereby causing the driving members 34 on both sides to rotate. This switches the rotation of the grinding wheel 35 and the rubber wheel 36 on both sides. The rubber wheel 36 on one side rotates to convey and the grinding wheel 35 on the other side rotates to grind. The system switches to one side of the grinding wheel 35 rotating to grind and the rubber wheel 36 on the other side rotating to convey.

[0079] The transmission module 32-1 is mounted on the movable plate 31-1 and includes a crossbar 32-11 fixedly connected to the inner wall of the cover 13. A movable plate 32-12 is rotatably mounted on the crossbar 32-11. The movable plate 32-12 is rotatably connected to the crossbar 32-11 via bearings. The movable plate 32-12 has a through hole 32-13 and a through hole 32-14 at both ends. A cylinder 32-15 is fixed on the movable plate 31-1 and slides within the through hole 32-13. A cylinder 32-16 is fixed on the flipping module 32-2 and slides within the through hole 32-14.

[0080] With the through holes 32-13 and 32-14 on the movable plate 32-12, when the movable plate 31-1 moves and drives the cylinder 32-15 to move, the cylinder 32-15 moves within the through hole 32-13, causing the movable plate 32-12 to rotate. This, in turn, causes the cylinder 32-16 to move within the through hole 32-14, thus affecting the flipping module 32-2.

[0081] The flipping module 32-2 is installed on the elastic element 33 and includes a guide rod 32-21 fixed to the inner wall of the cover 13. A sliding sleeve 32-22 is fitted on the guide rod 32-21, and a cylinder 32-16 is fixed to one side of it. The guide rod 32-21 is a square rod. The sliding sleeve 32-22 is slidably connected to the guide rod 32-21 and is guided by the guide rod 32-21. A short column 32-23 is fixed to the top of the sliding sleeve 32-22. A rotating cylinder 32-24 is rotatably mounted on one side of the cover 13 and is fitted onto the surface of the elastic element 33. The rotating cylinder 32-24 is rotatably connected to the cover 13 through a bearing. A drive groove 32-25 is opened on the outer surface of the rotating cylinder 32-24, and the upper end of the short column 32-23 slides inside it. A limit strip 32-26 is fixed to the inner wall of the rotating cylinder 32-24.

[0082] By setting up the short column 32-23 and the drive groove 32-25, when the cylinder 2 32-16 moves and drives the sliding sleeve 32-22 and the short column 32-23 to move, the short column 32-23 can move within the drive groove 32-25, causing the rotating drum 32-24 to rotate. By setting up the limiting strip 32-26 and the upper limit groove 33-4 of the long column 33-1, when the rotating drum 32-24 rotates, it can drive the long column 33-1 to rotate, thereby driving the entire elastic member 33 and the corresponding structure of the drive member 34 on it to rotate, without affecting the movement of the long column 33-1 when the guide plate 26-7 moves.

[0083] The elastic element 33 includes a long column 33-1 that slides inside the rotating drum 32-24 and is fixed to the guide plate 26-7. A block 33-2 slides inside the long column 33-1. A round rod 33-3 slides at one end of the long column 33-1. One end of the round rod 33-3 extends into the long column 33-1 and is fixed to the block 33-2. The other end is fixed to the drive element 34. The round rod 33-3 passes through the long column 33-1 and is slidably connected to it. With the block 33-2, the long column 33-1 can rotate when it rotates, thereby driving the round rod 33-3 and the drive element 34 at one end to rotate, switching the state of the grinding wheel 35 and the rubber wheel 36 on both sides. When the long column 33-1 moves away from the welding pipe, it can pull the round rod 33-3 to move.

[0084] A limiting groove 33-4 is provided on the long column 33-1, and a limiting strip 32-26 slides within it. A spring 33-5 is fixed between the surface of the block 33-2 and the inner wall of the long column 33-1. With the setting of the spring 33-5, when the elastic element 33 moves as the guide plate 26-7 moves, the corresponding grinding wheel 35 and rubber wheel 36 on the driving element 34 come into contact with the welding pipe. As the guide plate 26-7 moves, the long column 33-1 moves. At this time, the spring 33-5 is compressed, providing space for the long column 33-1 and the guide plate 26-7 to continue moving. With the elastic force of the spring 33-5, the grinding wheel 35 and rubber wheel 36 are in close contact with the welding pipe. When the grinding wheel 35 and rubber wheel 36 on both sides are rotated and switched, the compression can provide space for rotation and switching without affecting normal switching.

[0085] Example 4

[0086] Reference Figures 8 to 21 This is the fourth embodiment of the present invention, which is based on the first three embodiments.

[0087] Specifically, the drive component 34 includes a U-shaped plate 34-1 fixed to one end of the round rod 33-3. A motor 34-2 is fixed on the U-shaped plate 34-1. A rotating tube 34-3 is rotatably mounted on the U-shaped plate 34-1, and one end of the tube is fixed to the output shaft of the motor 34-2. The rotating tube 34-3 is rotatably connected to the U-shaped plate 34-1 through a bearing. The grinding wheel 35 and the rubber wheel 36 are both sleeved on the outer surface of the rotating tube 34-3. Two rubber wheels 36 are provided on one rotating tube 34-3 and are symmetrically distributed at both ends of the grinding wheel 35. Multiple connecting pipes 34-4 are provided on one rubber wheel 36. Through this arrangement, the hydraulic oil passing through the rotating tube 34-3 can enter the rubber wheel 36 more evenly for distribution.

[0088] A connecting pipe 34-4 connects the rotating pipe 34-3 and the rubber wheel 36. A connecting pipe 34-5 is fixed on the U-shaped plate 34-1. One end of the connecting pipe 34-5 is rotatably connected to the rotating pipe 34-3, and the other end is connected to a flexible hose 34-6. The connecting pipe 34-5 is rotatably connected to the rotating pipe 34-3 through a sealed bearing. The lower end of the flexible hose 34-6 passes through the platform 11 and is connected to the liquid tank 24-1. The control rod 37 is fixedly connected to the U-shaped plate 34-1 on one side.

[0089] The hydraulic tank 24-1 and the connecting pipe 34-5 are kept connected by the hose 34-6. The connection is not affected when the U-shaped plate 34-1, the rotating pipe 34-3, and the connecting pipe 34-5 rotate. When the piston 24-2 moves down in the hydraulic tank 24-1, the hydraulic oil in the hydraulic tank 24-1 is forced into the rubber wheel 36 through the hose 34-6, the connecting pipe 34-5, the rotating pipe 34-3, and the connecting pipe 34-4. This increases the force between the rubber wheel 36 and the welded pipe and pipe head, ensuring normal operation of the drive rotation.

[0090] The switching component 41 includes a valve housing 41-1 fixed on the platform 11 and connected to the connecting shell 42. A valve block 41-3 slides inside the valve housing 41-1. The valve block 41-3 has a first circular hole 41-4 and a second circular hole 41-5 respectively. The valve housing 41-1 has a third circular hole 41-6 and a fourth circular hole 41-7 respectively. The first circular hole 41-4 and the third circular hole 41-6 cooperate with each other, and the second circular hole 41-5 and the fourth circular hole 41-7 cooperate with each other. One end of the valve block 41-3 is provided with an inclined surface. With this setting, when the control rod 37 rotates with the U-shaped plate 34-1, the control rod 37 contacts the inclined surface and squeezes it, causing the valve block 41-3 to move and connect the first circular hole 41-4 and the third circular hole 41-6, switching the connection between the second circular hole 41-5 and the fourth circular hole 41-7, thereby switching whether the nozzle 44 sprays gas or mist.

[0091] A positioning groove 41-8 is provided inside the valve housing 41-1. A positioning block 41-9 is fixed on the valve block 41-3 and slides within the positioning groove 41-8. The positioning groove 41-8 and the positioning block 41-9 guide and limit the valve block 41-3 to prevent it from detaching from the valve housing 41-1. A spring 41-2 is fixed between the surface of the positioning block 41-9 and the inner wall of the positioning groove 41-8. When the control rod 37 presses the valve block 41-3 to move, the valve block 41-3 drives the positioning block 41-9 to move and compress the spring 41-2. When the control rod 37 detaches from the valve block 41-3, the spring 41-2 provides a force for the valve block 41-3 to reset.

[0092] The valve housing 41-1 is fixedly connected to the platform 11 via a support rod. The valve housing 41-1 is connected to an air pipe 45 and a water pipe 46. The air pipe 45 is connected to the third round hole 41-6, and the water pipe 46 is connected to the fourth round hole 41-7. The air pipe 45 is connected to an external air supply device through a pipe, and the water pipe 46 is connected to an external water supply device through a pipe. By controlling the movement of the valve block 41-3, the nozzle 44 can switch between air and water spraying, thereby realizing the grinding and cleaning of the weld and the welding cooling operation. A ball bearing 15 is set between the ring plate 14 and the turntable 22, and it is embedded in the ring plate 14. There are several balls bearing 15, which support the turntable 22 without affecting its rotation. An anti-slip pad 28 is embedded on the top of the turntable 22, which prevents slippage between the turntable 22 and the pipe head.

[0093] The guide groove 23 includes groove 1 23-1, groove 2 23-2, groove 3 23-3, groove 4 23-4, groove 5 23-5 and groove 6 23-6, which are connected in sequence. The drive groove 32-25 includes slot 1 32-25-1, slot 2 32-25-2 and slot 3 32-25-3, which are connected in sequence. When the moving column 31-2 moves from groove 1 23-1 through groove 2 23-2 to groove 3 23-3, the turntable 22, the welding pipe and the pipe head rotate more than one revolution, and the short column 32-23 moves in slot 1 32-25-1, without causing the rotating drum 32-24 and the elastic element 33 to rotate.

[0094] When the moving column 31-2 moves from slot 3 23-3 through slot 4 23-4 into slot 5 23-5, the short column 32-23 moves from slot 1 32-25-1 through slot 2 32-25-2 into slot 3 32-25-3. During this process, the rotating drum 32-24 and the elastic element 33 rotate, which in turn causes the drive element 34 and its grinding wheel 35 and rubber wheel 36 to rotate and switch. When the moving column 31-2 moves from slot 5 23-5 into slot 6 23-6, the turntable 22, the welding tube and the tube head rotate more than one revolution during welding, and the short column 32-23 moves within slot 3 32-25-3. It does not cause the rotating drum 32-24 and the elastic element 33 to rotate. When the motor 34-2 on the drive element 34 rotates in the opposite direction, the process is reversed. After the welding mechanism 5 completes the welding, it automatically disengages.

[0095] A support plate 24-11 slides on the circular block 24-5. A fixing bolt 24-12 is threaded onto the circular block 24-5, and its lower end contacts the support plate 24-11. A groove 24-13 is opened inside the circular block 24-5. A slider 24-4 is fixed to the bottom of the support plate 24-11 and slides in the groove 24-13. Two support plates 24-11 are provided on one circular block 24-5. The fixing bolt 24-12 can fix the adjusted support plate 24-11. When the diameter of the welded pipe is large, the support plate 24-11 can be used to press down the circular block 24-5, thereby improving the applicability. The groove 24-13 and the slider 24-4 guide and limit the support plate 24-11 to prevent it from falling off the circular block 24-5.

[0096] One end of the square tube 27-1 is threaded with a fastening bolt 27-7, and one end of the bolt contacts the surface of the square plate 27-2. A positioning bolt 27-8 is fixed on the arc plate 27-5. One end of the positioning bolt 27-8 passes through the rubber pad 27-4 and the arc plate 27-3, and is fitted with a retaining ring 27-9. The fastening bolt 27-7 can fix the square plate 27-2 after it has been adjusted on the square tube 27-1, thereby adjusting the position of the arc plate 27-5 to meet the needs of clamping and centering welded pipes of different specifications. The positioning bolt 27-8 is used to install the rubber pad 27-4 and the arc plate 27-5 on the arc plate 27-3. The retaining ring 27-9 limits the positioning bolt 27-8 to prevent it from falling off the arc plate 27-3. It can also be removed to release the limitation on the positioning bolt 27-8. The positioning bolt 27-8 can be removed to facilitate the replacement of the rubber pad 27-4.

[0097] In use, after the tube head is fitted onto the round shell 21 and placed on the turntable 22, one end of the welding tube is gradually inserted into the tube head. Due to the effect of its gravity on the trigger 24, the airbag 25 expands, thereby exerting force on the inner surface of the tube head. Due to the circumferential expansion pushing action, the tube head is centered and coaxial with the round shell 21, and the tube head is fixed as it expands. When the trigger 24 is running, it can act on the transmission component 31, thereby bringing the two sets of clamping components 27 on the two covers 13 closer to each other, thereby clamping and pushing the welding tube on the tube head to center it, and thus aligning it with the tube head, so that the position to be welded is aligned, and maintaining the quality of subsequent welding.

[0098] When the transmission component 31 is running, it can drive the elastic component 33, which in turn drives the drive component 34 and the grinding wheel 35 and rubber wheel 36 on it to move, so that they act on the welded pipe and play a secondary centering and limiting role. When the piston 24-2 moves down in the liquid tank 24-1, it presses the hydraulic oil in the liquid tank 24-1 into the rubber wheel 36 through the hose 34-6, connecting pipe 34-5, rotating pipe 34-3 and connecting pipe 34-4, increasing the force between the rubber wheel 36 and the welded pipe and pipe head. When the rubber wheel 36 on one side rotates and drives the welded pipe and pipe head to rotate, the turntable 22 at its bottom rotates together. The grinding wheel 35 on the other side grinds the required welding area. During grinding, the control rod 37 does not act on it. At this time, the nozzle 44 sprays gas, which can blow away the grinding debris attached to the joint during grinding.

[0099] After rotating more than one revolution, the guide groove 23 acts on the transmission component 31, which in turn causes the elastic component 33 and the driving component 34 to rotate through the linkage component 32, thereby switching the state of the grinding wheel 35 and the rubber wheel 36 on both sides. The process changes from one side conveying and the other side grinding to one side grinding and the other side conveying. At this time, the welding device performs welding operations on the welding pipe and pipe head that need to be conveyed.

[0100] When the control lever 37 rotates to act on the switching component 41, the nozzle 44 sprays atomized water, which can cool the welded joint and facilitate the grinding wheel 35 to grind the cooled welded joint. After the welding is completed, when the motor 34-2 on the control drive component 34 rotates in the reverse direction, the turntable 22 and the corresponding structure are reset. During this process, the grinding wheel 35 and the rubber wheel 36 on both sides still switch, but it does not affect the grinding wheel 35 from grinding and polishing the cooled welded joint again.

[0101] In summary, with the cooperation of the centering clamping mechanism 2 and the support mechanism 1, the centering clamping mechanism 2 can clamp and center the welded pipe by its own weight. Compared with the existing technology, manual clamping is not required. The pipe head and the welded pipe can be placed and connected to achieve automatic centering clamping. With the cooperation of the conveying and grinding mechanism 3 and the cooling mechanism 4, mechanical grinding and cooling of the welded area can be performed before and after welding. Compared with the existing technology, the quality of the weld is improved, the risk of incomplete fusion is reduced, stress concentration and fatigue cracking are reduced, and the failure of subsequent anti-corrosion and coatings is avoided.

[0102] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automatic pipe end welding device, characterized in that: include, The support mechanism (1) includes a platform (11), a box (12) is fixed to the bottom of the platform (11), and a cover (13) and a ring plate (14) are fixed to the top of the platform (11), with the ring plate (14) located between the cover (13); A central clamping mechanism (2) is installed on a support mechanism (1), including a circular shell (21) rotating on a platform (11), a turntable (22) fixed on the circular shell (21), and a guide groove (23) opened at the bottom of the turntable (22). A trigger (24) is installed on the circular shell (21) and the box (12), and an airbag (25) is installed on the upper end of the trigger (24). A linkage (26) is installed on the trigger (24) and the platform (11), and a clamping member (27) is installed on the cover (13), and the clamping member (27) cooperates with the linkage (26). The conveying and grinding mechanism (3) is installed on the support mechanism (1) and the round shell (21), including the transmission component (31) installed on the ring plate (14) and the cover (13). The cover (13) is respectively equipped with a linkage component (32) and an elastic component (33). The linkage component (32) is set on the transmission component (31) and the elastic component (33). The elastic component (33) is equipped with a driving component (34), and the driving component (34) is respectively equipped with a grinding wheel (35), a rubber wheel (36) and a control rod (37). A cooling mechanism (4), installed on a platform (11), includes a switching component (41) fixed to the platform (11), and the switching component (41) is connected to a connecting shell (42), one side of the connecting shell (42) is connected to a bent pipe (43), and one end of the bent pipe (43) is connected to a nozzle (44); and, Welding mechanism (5) is fixed on platform (11); By setting the control lever (37), when the control lever (37) rotates with the drive component (34), it will act on the switching component (41) on the cooling mechanism (4) to switch the nozzle (44) from air output to atomized water spray. The trigger (24) includes a liquid tank (24-1) fixed to the inner wall of the housing (12), a piston (24-2) sliding inside the liquid tank (24-1), a vertical tube (24-3) sliding on the liquid tank (24-1), the lower end of the vertical tube (24-3) being rotatably connected to the piston (24-2), the upper end of the vertical tube (24-3) extending through the circular shell (21) to the top and being fixedly connected to a circular block (24-5), the airbag (25) being sleeved on the upper end of the vertical tube (24-3), and the bottom of the airbag (25) being fixed with a... Support ring (24-6), the support ring (24-6) is fixed to the upper end of the round shell (21), the bottom of the airbag (25) is connected to the vertical tube (24-7), the vertical tube (24-3) is connected to the short tube (24-8), and the upper end of the short tube (24-8) is inserted into the vertical tube (24-7). The lower end surface of the vertical tube (24-3) is fitted with a spring (24-9), and a limiting plate (24-10) is fixed on the vertical tube (24-3), and the limiting plate (24-10) slides on the round shell (21).

2. The automatic pipe head welding device as described in claim 1, characterized in that: The linkage (26) includes a connecting plate (26-1) sleeved on the surface of the vertical tube (24-3), a vertical plate (26-2) sliding on the platform (11), and the lower end of the vertical plate (26-2) fixed on the connecting plate (26-1). A guide plate (26-3) is fixed on the upper end of the vertical plate (26-2). A guide hole (26-4) is opened on the guide plate (26-3). A guide post (26-5) slides in the guide hole (26-4) and is fixed on the clamping member (27). A guide post (26-6) is fixed on the vertical plate (26-2). A guide plate (26-7) slides on the vertical plate (26-2) and is fixed on the surface of the elastic member (33). A guide hole (26-8) is opened on the guide plate (26-7), and the guide post (26-6) slides in the guide hole (26-8).

3. The automatic pipe head welding device as described in claim 2, characterized in that: The clamping member (27) includes a square tube (27-1) that slides on the cover (13). A square plate (27-2) slides inside one end of the square tube (27-1), and the other end is fixedly connected to a guide post (26-5). An arc plate (27-3) is fixed to one end of the square plate (27-2). A rubber pad (27-4) is provided on one side of the arc plate (27-3). An arc plate (27-5) is provided on one side of the rubber pad (27-4). A ball bearing (27-6) is embedded on one side of the arc plate (27-5).

4. The automatic pipe head welding device as described in claim 3, characterized in that: The transmission component (31) includes a movable plate (31-1) that slides on the cover (13) and the ring plate (14). A movable column (31-2) is fixed on the movable plate (31-1). A rotating ring (31-3) rotates on the platform (11) and is sleeved on the outer surface of the circular shell (21). A guide frame (31-4) is fixed on the outer surface of the rotating ring (31-3). The lower end of the movable column (31-2) slides in the guide frame (31-4). The upper end of one of the two movable columns (31-2) slides in the guide groove (23), and the upper end of the other movable column (31-2) does not slide in the guide groove (23).

5. The automatic pipe head welding device as described in claim 4, characterized in that: The linkage component (32) includes a transmission module (32-1) and a flipping module (32-2). Both the transmission module (32-1) and the flipping module (32-2) are installed inside the cover (13) and cooperate with each other. The transmission module (32-1) is set on the moving plate (31-1) and includes a crossbar (32-11) fixedly connected to the inner wall of the cover (13). A movable plate (32-12) is rotated. The movable plate (32-12) has through holes 1 (32-13) and 2 (32-14) at its two ends. A cylinder 1 (32-15) is fixed on the movable plate (31-1) and slides in through hole 1 (32-13). A cylinder 2 (32-16) is fixed on the flipping module (32-2) and slides in through hole 2 (32-14).

6. The automatic pipe head welding device as described in claim 5, characterized in that: The flipping module (32-2) is installed on the elastic element (33) and includes a guide rod (32-21) fixed to the inner wall of the cover (13). A sliding sleeve (32-22) is fitted on the guide rod (32-21), and a cylinder (32-16) is fixed to one side of the sliding sleeve (32-22). A short column (32-23) is fixed to the top of the sliding sleeve (32-22). A rotating cylinder (32-24) is rotated on one side of the cover (13), and the rotating cylinder (32-24) is fitted on the surface of the elastic element (33). A driving groove (32-25) is opened on the outer surface of the rotating cylinder (32-24), and the upper end of the short column (32-23) slides in the driving groove (32-25). A limit strip (32-26) is fixed to the inner wall of the rotating cylinder (32-24).

7. The automatic pipe head welding device as described in claim 6, characterized in that: The elastic element (33) includes a long column (33-1) that slides within the rotating cylinder (32-24) and is fixed to the guide plate (26-7). A block (33-2) slides within the long column (33-1). A round rod (33-3) slides at one end of the long column (33-1). One end of the round rod (33-3) extends into the long column (33-1) and is fixed to the block (33-2). The other end of the round rod (33-3) is fixed to the driving element (34). A limiting groove (33-4) is provided on the long column (33-1), and a limiting strip (32-26) slides within the limiting groove (33-4). A spring (33-5) is fixed between the surface of the block (33-2) and the inner wall of the long column (33-1).

8. The automatic pipe head welding device as described in claim 7, characterized in that: The driving component (34) includes a U-shaped plate (34-1) fixed to one end of a round rod (33-3), a motor (34-2) fixed on the U-shaped plate (34-1), a rotating tube (34-3) rotating on the U-shaped plate (34-1), and one end of the rotating tube (34-3) fixed to the output shaft of the motor (34-2). The grinding wheel (35) and the rubber wheel (36) are both sleeved on the outer surface of the rotating tube (34-3). A connecting pipe (34-4) is connected between the rubber wheels (36). A connecting pipe (34-5) is fixed on the U-shaped plate (34-1). One end of the connecting pipe (34-5) is rotatably connected to the rotating pipe (34-3). The other end of the connecting pipe (34-5) is connected to a flexible hose (34-6). The lower end of the flexible hose (34-6) passes through the platform (11) and is connected to the liquid tank (24-1). The control rod (37) is fixedly connected to the U-shaped plate (34-1) on one side.

9. The automatic pipe head welding device as described in claim 1, characterized in that: The switching component (41) includes a valve housing (41-1) fixed on the platform (11), and the valve housing (41-1) is connected to the communicating shell (42). A valve block (41-3) slides inside the valve housing (41-1). The valve block (41-3) is provided with a first round hole (41-4) and a second round hole (41-5). The valve housing (41-1) is provided with a third round hole (41-6) and a fourth round hole (41-7). -4) It cooperates with the third round hole (41-6), the second round hole (41-5) cooperates with the fourth round hole (41-7), the valve body (41-1) is provided with a positioning groove (41-8), the valve block (41-3) is fixed with a positioning block (41-9), and the positioning block (41-9) slides in the positioning groove (41-8). A spring (41-2) is fixed between the surface of the positioning block (41-9) and the inner wall of the positioning groove (41-8).

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