Automatic pipe head welding device

Abstract

The invention discloses an automatic pipe head welding device, and relates to the technical field of pipe head welding, the automatic pipe head welding device comprises a supporting mechanism, the supporting mechanism comprises a table body, a box body is fixed to the bottom of the table body, cover bodies and an annular plate are fixed to the top of the table body, and the annular plate is located between the cover bodies; and the centering clamping mechanism is mounted on the supporting mechanism and comprises a round shell rotating on the table body, a rotating disc is fixed on the round shell, and a guide groove is formed in the bottom of the round shell. Through the centering clamping mechanism, under the cooperation of the supporting mechanism, clamping and centering can be achieved through self weight, manual clamping operation is not needed, and automatic centering clamping can be achieved only by placing and abutting a pipe head and a welding pipe; mechanical polishing operation and cooling can be carried out on a welding position before and after welding, the welding quality of a welding seam is improved, the risk of incomplete fusion is reduced, the conditions of stress concentration and fatigue cracking are reduced, and subsequent corrosion prevention and failure of a coating are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of pipe head welding, in particular to an automatic pipe head welding device. Background Art

[0002] Pipe end arc welding device mainly refers to the automated arc welding equipment used for pipeline ends (including pipe-to-pipe butt connection, pipe-to-flange, elbow and other pipe fittings connection), especially argon arc welding as the mainstream technology, which has the characteristics of high welding precision, stable quality and wide range of applications.

[0003] However, in practical applications, there are still some unresolved problems. The following are some common problems of automatic pipe head welding devices: In most cases, the weld cannot be mechanically polished before and after welding. If it is not polished before welding, the oil, rust or oxide layer on the weld will not be removed. Pollutants will produce defects such as pores and slag inclusions at high temperatures, which will reduce the density and strength of the weld and increase the risk of unfusion. If it is not polished after welding, the weld excess height or uneven surface will form stress concentration points, which are easy to cause fatigue cracks and expand under pressure or vibration conditions of the pipeline. It is difficult to form a uniform anti-corrosion coating on the rough weld surface, the coating adhesion is reduced, and local corrosion is accelerated. Even if a few are polished manually, the efficiency is low and the quality is poor. Summary of the Invention

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

[0005] Therefore, the problem to be solved by the present invention is how to solve the problem that in most cases the weld cannot be mechanically polished before and after welding. If it is not polished before welding, the pollutants will produce defects such as pores and slag inclusions at high temperatures, reducing the density and strength of the weld and increasing the risk of unfusion. If it is not polished after welding, the weld excess height or uneven surface will form stress concentration points, which are easy to cause fatigue cracks and expand. The rough weld surface is difficult to form a uniform anti-corrosion coating, and the coating adhesion is reduced.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a pipe head automatic welding device, comprising:

[0007] The supporting mechanism includes a platform, a box body is fixed to the bottom of the platform, a cover body and a ring plate are respectively fixed to the top of the platform, and the ring plate is located between the cover bodies;

[0008] The central clamping mechanism is mounted on the supporting mechanism and includes a circular shell that rotates on the platform, a turntable is fixed on the circular shell, and a guide groove is opened at the bottom of the circular shell, a trigger is mounted on the circular shell and the box body, and an airbag is mounted on the upper end of the trigger, a linkage is mounted on the trigger and the platform, and a clamping member is mounted on the cover body and cooperates with the linkage member;

[0009] The conveying and grinding mechanism is installed on the supporting mechanism and the circular shell, and includes a transmission member installed on the ring plate and the cover body, a linkage assembly and an elastic member are respectively installed on the cover body, the linkage assembly is arranged on the transmission member and the elastic member, the elastic member is installed with a driving member, and the grinding wheel, rubber wheel and control rod are respectively installed on the elastic member;

[0010] A cooling mechanism is installed on the platform, including a switching member fixed on the platform, and is connected to a connecting shell, one side of the connecting shell is connected to a bend pipe, and one end of the connecting shell is connected to a nozzle; and

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

[0012] As a preferred solution of the automatic welding device for tube heads described in the present invention, wherein: the trigger component includes a liquid tank fixed to the inner wall of the box body, a piston sliding in the liquid tank, a vertical tube sliding on the liquid tank, the lower end of which is rotatably connected with the piston, the upper end of which passes through the circular shell and extends to the top and is fixedly connected with a round block, the airbag is sleeved on the upper end of the vertical tube, and a support ring is fixed at the bottom of the airbag, the support ring is fixed to the upper end of the circular shell, the bottom of the airbag is connected to a vertical cylinder, the vertical tube is connected to a short tube, and the upper end of the tube is inserted into the vertical cylinder, the lower end surface of the vertical tube is sleeved with a spring 1, a limiting plate is fixed on the vertical tube, and it slides on the circular shell.

[0013] As a preferred solution of the automatic welding device for pipe heads described in the present invention, the linkage comprises a connecting plate sleeved on the surface of the vertical tube, a vertical plate is slid on the table body, and its lower end is fixed on the connecting plate, a guide plate 1 is fixed on the upper end of the vertical plate, a guide hole 1 is provided on the guide plate 1, a guide column 1 slides in the guide hole 1 and is fixed on the clamping member, a guide column 2 is fixed on the vertical plate, a guide plate 2 slides on the vertical plate and is fixed on the surface of the elastic member, a guide hole 2 is provided on the guide plate 2, and the guide column 2 slides therein.

[0014] As a preferred solution of the automatic welding device for tube heads described in the present invention, the clamping member includes a square tube sliding on the cover body, a square plate sliding inside one end of the square tube, and the other end fixedly connected to a guide column, an arc-shaped plate 1 is fixed to one end of the square plate, a rubber pad is provided on one side of the arc-shaped plate 1, an arc-shaped plate 2 is provided on one side of the rubber pad, and a ball bearing 2 is embedded on one side of the arc-shaped plate 2.

[0015] As a preferred solution of the automatic welding device for pipe heads described in the present invention, the transmission member includes a movable plate sliding on the cover body and the ring plate, a movable column is fixed on the movable plate, a rotating ring rotates on the table body and is 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 therein, the upper end of one of the two movable columns slides in the guide groove, and the upper end of the other does not slide therein.

[0016] As a preferred solution of the automatic welding device for pipe heads described in the present invention, wherein: the linkage assembly includes a transmission module and a flip module, the transmission module and the flip module are both installed in the cover body and cooperate with each other, the transmission module is arranged on the movable plate, including a cross bar fixedly connected to the inner wall of the cover body, a movable plate is rotatably arranged on the cross bar, and through hole 1 and through hole 2 are respectively provided at both ends of the movable plate, a cylinder 1 is fixed on the movable plate, and it slides in through hole 1, and a cylinder 2 is fixed on the flip module, and it slides in through hole 2.

[0017] As a preferred solution of the automatic welding device for pipe heads described in the present invention, wherein: the flip module is installed on the elastic part, including a guide rod fixed to the inner wall of the cover body, a sliding sleeve is provided on the guide rod, and cylinder 2 is fixed to one side of it, a short column is fixed to the top of the sliding sleeve, a rotating drum is rotated on one side of the cover body, and it is sleeved on the surface of the elastic part, a driving groove is opened on the outer surface of the rotating drum, and the upper end of the short column slides therein, and a limiting strip is fixed to the inner wall of the rotating drum.

[0018] As a preferred solution of the automatic welding device for pipe heads described in the present invention, the elastic member includes a long column sliding in the rotating drum and fixed on the guide plate 2, a square sliding in the long column, a round rod sliding at one end of the long column, one end of the round rod extending into the long column and fixed to the square, and the other end of the round rod fixed to the driving member, a limiting groove is provided on the long column, and a limiting bar slides therein, and a spring 2 is fixed between the surface of the square and the inner wall of the long column.

[0019] As a preferred solution of the automatic welding device for pipe heads described in the present invention, wherein: the driving member includes a U-shaped plate fixed to one end of a round rod, a motor is fixed to the U-shaped plate, a rotating tube is rotatably provided on the U-shaped plate, and one end of the rotating tube is fixed to the output shaft of the motor, the grinding wheel and the rubber wheel are both sleeved on the outer surface of the rotating tube, a connecting tube is connected between the rotating tube and the rubber wheel, a connecting tube is fixed to the U-shaped plate, one end of the connecting tube is rotatably connected to the rotating tube, and the other end is connected to a hose, the lower end of the hose passes through the platform and is connected to the liquid tank, and the control rod is fixedly connected to the U-shaped plate on one side.

[0020] As a preferred solution of the automatic welding device for pipe heads described in the present invention, wherein: the switching component includes a valve housing fixed on the platform, and is connected to the connecting shell, a valve block slides in the valve housing, circular hole one and circular hole two are respectively provided on the valve block, circular hole three and circular hole four are respectively provided on the valve housing, circular hole one cooperates with circular hole three, and circular hole two cooperates with circular hole four, a positioning groove is provided in the valve housing, a positioning block is fixed on the valve block, and it slides in the positioning groove, and a spring three is fixed between the surface of the positioning block and the inner wall of the positioning groove.

[0021] The beneficial effects of the present invention are as follows: the centering clamping mechanism, in cooperation with the supporting mechanism, can clamp in the center by its own weight, and does not require manual clamping operation. Automatic centering clamping can be achieved by simply placing the pipe head and the welded pipe in a docking position. The conveying and grinding mechanism, in cooperation with the cooling mechanism, can achieve mechanical grinding and cooling of the weld before and after welding, thereby improving the quality of the weld, reducing the risk of unfusion, reducing stress concentration and fatigue cracking, and avoiding subsequent corrosion protection and coating failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

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

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

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

[0026] Figure 4 It is a sectional stereoscopic view of the local structure of the pipe head automatic welding device.

[0027] Figure 5 For automatic welding device of pipe head Figure 4 Enlarged view of area A in the middle.

[0028] Figure 6 For automatic welding device of pipe head Figure 4 Enlarged view of area B.

[0029] Figure 7 For automatic welding device of pipe head Figure 4 Enlarged view of area C in the middle.

[0030] Figure 8 It is a partial structural sectional plan view of the automatic welding device for pipe heads.

[0031] Figure 9 For automatic welding device of pipe head Figure 8 Enlarged view of area D in the middle.

[0032] Figure 10 For automatic welding device of pipe head Figure 8 Enlarged view of area E in the middle.

[0033] Figure 11 For automatic welding device of pipe head Figure 8 Enlarged view of area F in the middle.

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

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

[0036] Figure 14 This is a cross-sectional plan view of the turntable structure of the tube head automatic welding device.

[0037] Figure 15 This is a partially cutaway stereoscopic view of the clamping structure of the pipe head automatic welding device.

[0038] Figure 16 This is a three-dimensional diagram of the grinding wheel, rubber wheel and control lever structure of the automatic pipe head welding device.

[0039] Figure 17 For automatic welding device of pipe head Figure 16 Enlarged view of the middle G area.

[0040] Figure 18 This is a partially cutaway stereoscopic view of the elastic component and driving component of the automatic welding device for pipe heads.

[0041] Figure 19 This is a partial three-dimensional diagram of the cooling mechanism structure of the pipe head automatic welding device.

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

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

[0044] In the figure: 1. Support mechanism; 11. Platform; 12. Box; 13. Cover; 14. Ring plate; 15. Ball bearing 1; 2. Centering clamping mechanism; 21. Round shell; 22. Turntable; 23. Guide groove; 24. Trigger; 25. Airbag; 26. Linkage; 27. Clamping member; 28. Anti-slip pad; 3. Conveying and grinding mechanism; 31. Transmission member; 32. Linkage assembly; 33. Elastic member; 34. Driving member; 35. Grinding wheel; 36. Rubber wheel; 37. Control lever; 4. Cooling mechanism; 41. Switching member; 42. Connecting shell; 43. Elbow; 44. Nozzle; 45. Air pipe; 46. Water pipe; 5. Welding mechanism; 24-1. Liquid tank; 24-2 , piston; 24-3, vertical tube; 24-4, slider; 24-5, round block; 24-6, support ring; 24-7, vertical cylinder; 24-8, short tube; 24-9, spring 1; 24-10, limit plate; 24-11, support plate; 24-12, fixing bolt; 24-13, slide; 26-1, connecting plate; 26-2, vertical plate; 26-3, guide plate 1; 26-4, guide hole 1; 26-5, guide column 1; 26-6, guide column 2; 26-7, guide plate 2; 26-8, guide hole 2; 27-1, square tube; 27-2, square plate; 27-3, curved plate 1; 27-4, rubber pad; 27-5, curved 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 1; 32-14, through hole 2; 32-15, cylinder 1; 32-16, cylinder 2; 32-2, flip module; 32-21, guide rod; 32-22, sliding sleeve; 32-23, short column; 32-24, rotating drum; 32-25, driving groove; 32-26, limit bar; 33-1, long column; 33-2, block; 33-3, round rod; 33-4, limit Positioning slot; 33-5, spring two; 34-1, U-shaped plate; 34-2, motor; 34-3, rotating tube; 34-4, connecting tube; 34-5, connecting tube; 34-6, flexible tube; 41-1, valve housing; 41-2, spring three; 41-3, valve block; 41-4, round hole one; 41-5, round hole two; 41-6, round hole three; 41-7, round hole four; 41-8, positioning slot; 41-9, positioning block; 23-1, slot one; 23-2, slot two; 23-3, slot three; 23-4, slot four; 23-5, slot five; 23-6, slot six; 32-25-1, slot hole one; 32-25-2, slot hole two; 32-25-3, slot hole three. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0047] Secondly, the term "one embodiment" or "embodiment" 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 various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0048] Example 1

[0049] Reference Figures 1 to 8 , which is the first embodiment of the present invention, provides an automatic pipe head welding device, which includes a supporting mechanism 1, a centering clamping mechanism 2, a conveying and grinding mechanism 3, a cooling mechanism 4 and a welding mechanism 5. The centering clamping mechanism 2, in cooperation with the supporting mechanism 1, can clamp the pipe head in the center by its own weight without the need for manual clamping operation. The conveying and grinding mechanism 3, in cooperation with the cooling mechanism 4, can achieve mechanical grinding and cooling of the welding point before and after welding, thereby improving the quality of the weld.

[0050] Specifically, the support mechanism 1 includes a platform 11, a box 12 is fixed to the bottom of the platform 11, a cover 13 and a ring plate 14 are fixed to the top of the platform 11, and the ring 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, and the box 12, the platform 11 and the ring plate 14 provide installation positions for the corresponding structures.

[0051] Specifically, the central clamping mechanism 2 is installed on the supporting mechanism 1, and includes a circular shell 21 that rotates on the table 11. A turntable 22 is fixed on the circular shell 21, and a guide groove 23 is provided at the bottom of the circular shell 21. The circular shell 21 is rotatably connected to the table 11 through a bearing. The turntable 22 is fixedly sleeved on the outer surface of the circular shell 21. The turntable 22 is convenient for placing the tube head thereon for support. A trigger member 24 is installed on the circular shell 21 and the box body 12, and an airbag 25 is installed on the upper end thereof.

[0052] Through the setting of the airbag 25, after the tube head is sleeved on the circular 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 member 24, the airbag 25 is expanded, and then the inner surface of the tube head is subjected to force. Due to the driving effect of the circumferential expansion, the tube head is centered and coaxial with the circular shell 21, and the tube head is fixed as it expands, so that the tube head and the welding tube can rotate smoothly with the turntable 22 during subsequent driving, and the centering of the tube head can enable the welding tube to be initially positioned.

[0053] A linkage 26 is installed on the trigger 24 and the table 11, and a clamping member 27 is installed on the cover 13, and cooperates with the linkage 26. Through the setting of the clamping member 27, the trigger 24 can act on the transmission member 31 when it is running, so that the two groups of clamping members 27 on the two covers 13 are close to each other, and then the welding pipe on the pipe head is clamped and pushed to be centered, and then aligned with the pipe head to align the position to be welded, so as to maintain the quality of subsequent welding. In this fixed centering process, no manual clamping operation is required, and automatic centering clamping can be achieved by simply placing the pipe head and the welding pipe.

[0054] Specifically, the conveying and grinding mechanism 3 is installed on the supporting mechanism 1 and the round shell 21, and includes a transmission member 31 installed on the ring plate 14 and the cover body 13. Through the setting of the transmission member 31, when the turntable 22 rotates to rotate the guide groove 23 thereon, the linkage assembly 32 can be driven, and then the two elastic members 33 are rotated and switched, thereby acting on the driving member 34 to rotate and switch the two grinding wheels 35 and the rubber wheel 36 on both sides. The linkage assembly 32 and the elastic member 33 are respectively installed on the cover body 13. The linkage assembly 32 is arranged on the transmission member 31 and the elastic member 33. The driving member 34 is installed on the elastic member 33, and the grinding wheel 35, the rubber wheel 36 and the control rod 37 are respectively installed thereon.

[0055] When the transmission member 31 is running, the elastic member 33 can drive it, thereby driving the driving member 34 and the grinding wheel 35 and rubber wheel 36 thereon to move, so that it acts on the welding pipe, playing a role of secondary centering limit. The grinding wheels 35 and rubber wheels 36 on the driving members 34 on both sides are staggered to form a cross-shaped form. When the grinding wheels 35 and rubber wheels 36 on one side rotate to drive the welding pipe and the pipe head to transmit, the grinding wheel 35 on the other side rotates to grind the position of the welding pipe and the pipe head welding point, which can polish the rusty position and improve the quality of subsequent welding. At this time, the rubber wheel 36 rotates and does not contact the welding pipe and the pipe head. When switching, the functions on both sides are also switched. At this time, the welding mechanism 5 welds the welding pipe and the pipe head welding point that are transmitted and rotated. As the transmission cooling mechanism 4 cools the welding completion position, the grinding wheel 35 grinds the cooled welding point.

[0056] Through the setting of the elastic member 33, the transmission member 31 acts on it to push it to move, so that the grinding wheel 35 and the rubber wheel 36 on the driving member 34 come into contact with the welding pipe and the pipe head. Under the action of the elastic member 33, the transmission member 31 can still operate. At this time, the elastic member 33 is compressed to make the grinding wheel 35 and the rubber wheel 36 elastically act on the welding pipe and the pipe head. When the grinding wheels 35 and the rubber wheels 36 on both sides are subsequently rotated and switched, their compression can provide space for rotation switching without affecting normal switching use. Through the setting of the control lever 37, when it rotates with the driving member 34, it acts on the switching member 41 on the cooling mechanism 4, switches the nozzle 44 to switch the gas outlet to atomized water spray, cools the position after the transmission welding, and plays a certain role in smoke precipitation.

[0057] Specifically, the cooling mechanism 4 is installed on the table body 11, and includes a switching member 41 fixed on the table body 11, and 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 connecting shell 42 is connected to a nozzle 44. Through the setting of the switching member 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 slag attached to the joint during grinding, thereby ensuring the quality of welding during subsequent welding.

[0058] When the control lever 37 rotates to act on the switching member 41, the nozzle 44 sprays atomized water, which can cool the joint after welding, making it easier for the grinding wheel 35 to grind the cooled weld, and prevent the weld from being ground before cooling, which affects the quality of welding. The nozzle 44 is a gas-liquid dual-purpose nozzle, which is existing technology. The working principle of this part is all existing technology, which can be clearly understood by those skilled in the art and will not be elaborated 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 welding pipe and the pipe head, the welding operation can be performed close to the welding mechanism 5. After the welding is completed, the welding mechanism 5 can automatically move away to realize automatic welding. This is a prior art. The working principle of this part is a prior art. Those skilled in the art can clearly know it and will not be elaborated here.

[0060] Example 2

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

[0062] Specifically, the trigger member 24 includes a liquid tank 24-1 fixed to the inner wall of the box body 12, a piston 24-2 slides in the liquid tank 24-1, the liquid tank 24-1 is filled with hydraulic oil, a sealing ring is provided between the piston 24-2 and the liquid tank 24-1, and is sleeved on the surface of the piston 24-2 to prevent the hydraulic oil from leaking from the gap therebetween, a vertical pipe 24-3 slides 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 the round block 24-5.

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

[0064] Through the setting of the round block 24-5, when the welding 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 be pressed down, and then the hydraulic oil in the liquid tank 24-1 enters the airbag 25 through the vertical pipe 24-3, the vertical cylinder 24-7 and the short pipe 24-8, so that the airbag 25 expands and supports the pipe head. The support ring 24-6 is fixedly connected to the round 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 tube 24-7, and the vertical tube 24-3 is connected to a short tube 24-8, and the upper end of the short tube 24-8 is inserted into the vertical tube 24-7. Through the setting of the vertical tube 24-3 and the short tube 24-8, the airbag 25 and the vertical tube 24-3 are kept 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 tube 24-8 can move inside the lower end of the vertical tube 24-3 and still keep connected. A sealing ring is provided between the vertical tube 24-7 and the short tube 24-8, and is embedded in the inner wall of the lower end of the vertical tube 24-7 to prevent hydraulic oil from leaking from the gap therebetween.

[0066] A spring 24-9 is sleeved on the lower end 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 pipe 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 is completed and the welding pipe is removed, a force is provided for the reset of the corresponding structure. A limit plate 24-10 is fixed on the vertical tube 24-3 and slides on the circular 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 circular shell 21 to rotate, it can drive the deliquescence box 24-1, the piston 24-2 and the trigger part 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 is slid on the platform 11, and its lower end is fixed on 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 plate 26-2 passes through the platform 11 and is slidably connected to it.

[0068] A guide plate 26-3 is fixed to the upper end of the vertical plate 26-2, and a guide hole 26-4 is opened on the guide plate 26-3. A guide column 26-5 slides in the guide hole 26-4 and is fixed on the clamping member 27. Through the setting of the guide hole 26-4 on the guide plate 26-3, when the guide plate 26-3 moves up and down, the guide column 26-5 can move therein, thereby making the two groups of clamping members 27 on both sides approach or move away from each other, thereby achieving central clamping or release of the welded pipe.

[0069] A second guide post 26-6 is fixed on the vertical plate 26-2, and a second guide plate 26-7 is slid on the vertical plate 26-2 and fixed to the surface of the elastic member 33. A second guide hole 26-8 is provided on the guide plate 26-7, and the guide post 26-6 slides therein. Through the setting of the second 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 second guide hole 26-8, and then move the guide plate 26-7, thereby realizing the movement of the elastic member 33 and the elastic member 33 acting on the driving member 34.

[0070] The clamping member 27 includes a square tube 27-1 that slides on the cover body 13. The square tube 27-1 passes through the cover body 13 and is slidably connected thereto. 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 column 26-5. An arc-shaped 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-shaped plate 27-3. An arc-shaped plate 27-5 is provided on one side of the rubber pad 27-4. Due to the arc-shaped setting of the arc-shaped plate 27-5, when the arc-shaped plate 27-5 moves, the ball 27-6 installed thereon can better contact the surface of the welded pipe.

[0071] A second ball 27-6 is embedded on one side of the arc-shaped plate 27-5. There are several second ball 27-6. Through the setting of the second ball 27-6, when the arc-shaped plate 27-5 moves and contacts the welding pipe, it can be clamped and centered. In the subsequent rotation, grinding and welding of the welding pipe and the pipe head, it can rotate smoothly with little obstruction. Through the setting of the rubber pad 27-4, after the second ball 27-6 on the arc-shaped plate 27-5 contacts and clamps the welding pipe, it can be slightly compressed as the arc-shaped plate 1 27-3 moves, avoiding the occurrence of hard friction and damage to the device.

[0072] Example 3

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

[0074] Specifically, the transmission member 31 includes a movable plate 31-1 that slides on the cover body 13 and the ring plate 14. The movable plate 31-1 passes through the cover body 13 and the ring plate 14 and is slidably connected thereto. 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 thereto. A rotating ring 31-3 rotates on the table body 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 therein. The rotating ring 31-3 is rotatably connected to the table body 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 in the guide groove 23, and the upper end of the other does not slide therein.

[0075] Through the setting of the guide frame 31-4 and the movable column 31-2, when the movable column 31-2 on one side moves to drive the movable plate 31-1 on one side to move, it can drive the movable plate 31-1 on the other side to move, so that the movable plates 31-1 on both sides are close to or away from each other, and then the elastic members 33 and driving members 34 on both sides are acted on at the same time through the linkage components 32 on both sides, so that the states of the corresponding grinding wheels 35 and rubber wheels 36 on both sides are switched.

[0076] Through the setting of the limiting groove 33-4, when the rubber wheel 36 on one side rotates to drive the welding pipe and the pipe head to rotate, the turntable 22 at the bottom thereof rotates together, and the grinding wheel 35 on the other side grinds the required welding part. As the rotation exceeds one circle, the guide groove 23 acts on the transmission member 31, and then the elastic member 33 and the driving member 34 are rotated through the linkage assembly 32, thereby switching the states of the grinding wheels 35 and rubber wheels 36 on both sides, and switching 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 operations on the welding pipes and pipe heads that need to be transported.

[0077] After welding is completed, the welding gun on the welding mechanism 5 automatically moves away, and the motor 34-2 is controlled to run in the reverse direction, the turntable 22 and the guide groove 23 rotate, and rotate in the opposite direction according to the transmission direction. During this process, the grinding wheels 35 and rubber wheels 36 on both sides are still switched, but it does not affect the grinding wheels 35 to grind and polish the welded joints after cooling and grinding.

[0078] The linkage assembly 32 includes a transmission module 32-1 and a flip module 32-2. The transmission module 32-1 and the flip module 32-2 are both installed in the cover body 13 and cooperate with each other. Through the cooperation of the transmission module 32-1, the flip module 32-2 can drive the elastic members 33 on both sides to rotate under the action of the movement of the movable plate 31-1, and then the driving members 34 on both sides are rotated, thereby rotating and switching the grinding wheels 35 and rubber wheels 36 on both sides, and switching from the rotation of the rubber wheel 36 on one side for conveying and the rotation of the grinding wheel 35 on the other side for grinding, to the rotation of the grinding wheel 35 on one side for grinding and the rotation of the rubber wheel 36 on the other side for conveying.

[0079] The transmission module 32-1 is arranged on the movable plate 31-1, including a cross bar 32-11 fixedly connected to the inner wall of the cover body 13, and a movable plate 32-12 is rotatably provided on the cross bar 32-11. The movable plate 32-12 is rotatably connected to the cross bar 32-11 through a bearing, and a through hole 1 32-13 and a through hole 2 32-14 are respectively provided at both ends of the movable plate 32-12. A cylinder 1 32-15 is fixed on the movable plate 31-1, and it slides in the through hole 1 32-13. A cylinder 2 32-16 is fixed on the flip module 32-2, and it slides in the through hole 2 32-14.

[0080] Through the arrangement of through hole 1 32-13 and through hole 2 32-14 on the movable plate 32-12, when the movable plate 31-1 moves and drives cylinder 1 32-15 to move, cylinder 1 32-15 moves in through hole 1 32-13 to rotate the movable plate 32-12, thereby moving cylinder 2 32-16 in through hole 2 32-14, and causing cylinder 2 32-16 to move and act on the flip module 32-2.

[0081] The flip module 32-2 is installed on the elastic member 33, including a guide rod 32-21 fixed to the inner wall of the cover body 13, a sliding sleeve 32-22 is provided on the guide rod 32-21, and the cylinder 2 32-16 is fixed on one side thereof, the guide rod 32-21 is a square rod, the sliding sleeve 32-22 is slidably connected to the guide rod 32-21, and the sliding sleeve 32-22 is guided by the guide rod 32-21, a short column 32-23 is fixed on the top of the sliding sleeve 32-22, a rotating drum 32-24 is rotatably provided on one side of the cover body 13, and it is sleeved on the surface of the elastic member 33, the rotating drum 32-24 is rotatably connected to the cover body 13 through a bearing, a driving groove 32-25 is provided on the outer surface of the rotating drum 32-24, and the upper end of the short column 32-23 slides therein, and a limiting strip 32-26 is fixed to the inner wall of the rotating drum 32-24.

[0082] By setting the short column 32-23 and the driving groove 32-25, when the cylinder 2 32-16 moves to drive the sliding sleeve 32-22 and the short column 32-23 to move, the short column 32-23 can move in the driving groove 32-25, so that the rotating drum 32-24 rotates. By setting the limiting strip 32-26 and the upper limiting groove 33-4 on the long column 33-1, when the rotating drum 32-24 rotates, the long column 33-1 can be driven to rotate, thereby driving the entire elastic member 33 and the corresponding structure of the driving member 34 thereon to rotate, and will not affect the movement of the long column 33-1 when the guide plate 2 26-7 moves.

[0083] The elastic member 33 includes a long column 33-1 that slides in the rotating drum 32-24 and is fixed on the guide plate 26-7. A block 33-2 slides in the long column 33-1, and 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, and the other end is fixed to the driving member 34. The round rod 33-3 passes through the long column 33-1 and is slidably connected with it. Through the setting of the block 33-2, when the long column 33-1 rotates, it can be rotated, thereby driving the round rod 33-3 and the driving member 34 on one end thereof to rotate, switching the states of the grinding wheels 35 and rubber wheels 36 on both sides, and 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 the limiting bar 32-26 slides therein. A spring 2 33-5 is fixed between the surface of the block 33-2 and the inner wall of the long column 33-1. Through the setting of the spring 2 33-5, when the elastic member 33 as a whole moves along with the movement of the guide plate 26-7, the corresponding grinding wheel 35 and rubber wheel 36 on the driving member 34 are in contact with the welding pipe, and then the long column 33-1 is driven to move along with the movement of the guide plate 26-7. At this time, the spring 2 33-5 is compressed to provide space for the continued movement of the long column 33-1 and the guide plate 26-7, and with the help of the elastic force of the spring 2 33-5, the grinding wheel 35 and rubber wheel 36 are in close contact with the welding pipe. When the grinding wheels 35 and rubber wheels 36 on both sides are subsequently rotated and switched, their compression can provide space for rotation switching without affecting normal switching use.

[0085] Example 4

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

[0087] Specifically, the driving member 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 rotatable on the U-shaped plate 34-1, and one end of the rotating tube 34-3 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, and a plurality of connecting tubes 34-4 are provided on one rubber wheel 36. Through such a setting, the hydraulic oil passing through the rotating tube 34-3 can be more evenly distributed into the rubber wheel 36.

[0088] A connecting pipe 34-4 is connected between 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 which is rotatably connected to the rotating pipe 34-3, and the other end of which is connected to a 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 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 liquid tank 24-1 and the connecting pipe 34-5 are kept in communication through the hose 34-6. At the same time, they are not affected when the U-shaped plate 34-1, the rotating pipe 34-3 and the connecting pipe 34-5 rotate, and they remain connected. When the piston 24-2 moves downward in the liquid tank 24-1, the hydraulic oil in the liquid tank 24-1 is pressed 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, thereby increasing the force between the rubber wheel 36 and the welding pipe and the pipe head, thereby ensuring normal driving rotation.

[0090] The switching member 41 includes a valve housing 41-1 fixed on the platform 11 and connected to the connecting housing 42. A valve block 41-3 slides in the valve housing 41-1. A circular hole 1 41-4 and a circular hole 2 41-5 are respectively provided on the valve block 41-3. A circular hole 3 41-6 and a circular hole 41-7 are respectively provided on the valve housing 41-1. The circular hole 1 41-4 cooperates with the circular hole 3 41-6, and the circular hole 2 41-5 cooperates with the circular hole 4 41-7. An inclined surface is provided at one end of the valve block 41-3. Through such a 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, so that the valve block 41-3 moves, and the circular hole 1 41-4 and the circular hole 3 41-6 are connected, and the circular hole 2 41-5 is connected with the circular hole 4 41-7, thereby switching whether the nozzle 44 sprays gas or mist.

[0091] A positioning groove 41-8 is provided in the valve housing 41-1, and a positioning block 41-9 is fixed on the valve block 41-3, and the valve block 41-3 slides in the positioning groove 41-8. The valve block 41-3 is guided and limited by the positioning groove 41-8 and the positioning block 41-9 to prevent it from separating from the valve housing 41-1. A spring three 41-2 is fixed between the surface of the positioning block 41-9 and the inner wall of the positioning groove 41-8. Through the setting of the spring three 41-2, when the control rod 37 squeezes the valve block 41-3 to move, the valve block 41-3 drives the positioning block 41-9 to move to compress the spring three 41-2. When the control rod 37 subsequently separates from the valve block 41-3, it provides a force for the valve block 41-3 to reset.

[0092] The valve housing 41-1 is fixedly connected to the platform 11 through a support rod. The valve housing 41-1 is respectively connected with an air pipe 45 and a water pipe 46. The air pipe 45 is connected to the circular hole three 41-6, and the water pipe 46 is connected to the circular hole four 41-7. The air pipe 45 is connected to an external air supply device through a pipeline, and the water pipe 46 is connected to an external water supply device through a pipeline. By controlling the movement of the valve block 41-3, the switching between air jet and water spray of the nozzle 44 is realized, thereby realizing the grinding and cleaning of the welding point and the welding cooling operation. A ball 15 is provided between the ring plate 14 and the turntable 22, and it is embedded in the ring plate 14. There are several balls 15, which support the turntable 22 without affecting the rotation. An anti-slip pad 28 is embedded on the top of the turntable 22, and the anti-slip pad 28 plays a role in preventing slipping between the turntable 22 and the pipe head.

[0093] The guide groove 23 includes groove 1 23-1, groove 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 driving 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 slot 1 23-1 through slot 2 23-2 to slot 3 23-3, the turntable 22, the welding pipe and the pipe head rotate more than one circle, and the short column 32-23 moves in slot 1 32-25-1, and does not cause the rotating drum 32-24 and the elastic member 33 to rotate.

[0094] When the movable column 31-2 enters the slot five 23-5 from the slot three 23-3 through the slot four 23-4, the short column 32-23 enters the slot three 32-25-3 from the slot one 32-25-1 through the slot two 32-25-2. In this process, the rotating drum 32-24 and the elastic member 33 are rotated, and then the driving member 34 and the grinding wheel 35 and the rubber wheel 36 thereon are rotated and switched. When the movable column 31-2 enters the slot six 23-6 from the slot five 23-5, the turntable 22, the welding pipe and the pipe head rotate more than one circle during welding, and the short column 32-23 moves in the slot three 32-25-3, and does not cause the rotating drum 32-24 and the elastic member 33 to rotate. When the motor 34-2 on the driving member 34 is controlled to rotate in the opposite direction, the above is reversed, and the welding mechanism 5 automatically disengages after completing welding.

[0095] A support plate 24-11 slides on the round block 24-5, and a fixing bolt 24-12 is threadedly connected to the round block 24-5, and its lower end contacts the support plate 24-11. A slide groove 24-13 is provided in the round block 24-5, and a slider 24-4 is fixed to the bottom of the support plate 24-11, and it slides in the slide groove 24-13. Two support plates 24-11 are provided on one round block 24-5, and the fixing bolt 24-12 can fix the adjusted support plate 24-11. When the diameter of the welded pipe is large, it can act on the support plate 24-11, and then press the round block 24-5 downward, thereby improving the scope of application. The support plate 24-11 is guided and limited by the slide groove 24-13 and the slider 24-4 to prevent it from separating from the round block 24-5.

[0096] One end of the square tube 27-1 is threadedly connected with a fastening bolt 27-7, and one end of the fastening bolt is in contact with 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 1 27-3, and is sleeved with a clamping ring 27-9. The square plate 27-2 adjusted on the square tube 27-1 can be fixed by the fastening bolt 27-7, and then the position of the arc plate 27-5 can be adjusted to meet the needs of centering welded pipes of different specifications. The rubber pad 27-4 and the arc plate 27-5 are installed on the arc plate 1 27-3 through the positioning bolt 27-8. The clamping ring 27-9 is set to limit the positioning bolt 27-8 to prevent it from detaching from the arc plate 1 27-3. When it is removed, it is convenient to release the limit of the positioning bolt 27-8. Removing the positioning bolt 27-8 facilitates the replacement of the rubber pad 27-4.

[0097] During use, after the tube head is sleeved on the circular 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 member 24, the airbag 25 is expanded, and then the inner surface of the tube head is subjected to force. Due to the pushing effect of the circumferential expansion, the tube head is centered and coaxial with the circular shell 21, and the tube head is fixed as it expands. When the trigger member 24 is running, it can act on the transmission member 31, and then the two groups of clamping members 27 on the two covers 13 are close to each other, and then the welding tube on the tube head is clamped and pushed to be centered, and then corresponding to the tube head, so that the position to be welded is aligned to maintain the quality of subsequent welding.

[0098] When the transmission member 31 is running, it can drive the elastic member 33, and then drive the driving member 34 and the grinding wheel 35 and rubber wheel 36 thereon to move, so that it acts on the welding pipe, playing the role of secondary centering limit. When the piston 24-2 moves down in the liquid tank 24-1, the hydraulic oil in the liquid tank 24-1 is pressed into the rubber wheel 36 through the hose 34-6, connecting pipe 34-5, rotating pipe 34-3 and connecting pipe 34-4, thereby increasing the force between the rubber wheel 36 and the welding pipe and the pipe head. When the rubber wheel 36 on one side rotates to drive the welding pipe and the pipe head to rotate, the turntable 22 at the bottom thereof rotates together, and the grinding wheel 35 on the other side grinds the required welding point. 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 beyond one circle, the guide groove 23 acts on the transmission member 31, and then the elastic member 33 and the driving member 34 are rotated through the linkage assembly 32, thereby switching the states of the grinding wheels 35 and rubber wheels 36 on both sides, and switching 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 operations on the welding pipes and pipe heads that need to be transported.

[0100] When the control lever 37 rotates to act on the switching member 41, the nozzle 44 sprays atomized water, which can cool the joint after welding, making it easier for the grinding wheel 35 to grind the cooled weld. After welding is completed, the motor 34-2 on the driving member 34 is controlled to rotate in the opposite direction, so that the turntable 22 and the corresponding structure are reset. During this process, the grinding wheels 35 and rubber wheels 36 on both sides are still switched, but it does not affect the grinding wheel 35 to grind and polish the weld after cooling.

[0101] In summary, the centering clamping mechanism 2, in cooperation with the supporting mechanism 1, can be clamped in the center by its own weight. Compared with the existing technology, no manual clamping operation is required. Only the pipe head and the welding pipe need to be placed and docked to achieve automatic centering clamping. The conveying and grinding mechanism 3, in cooperation with the cooling mechanism 4, can achieve mechanical grinding and cooling of the welding point before and after welding. Compared with the existing technology, the quality of the weld is improved, the risk of unfusion is reduced, stress concentration and fatigue cracking are reduced, and subsequent anti-corrosion and coating failure are 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 the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A pipe head automatic welding device, characterized by: include, The support mechanism (1) comprises a platform (11), a box (12) is fixed to the bottom of the platform (11), a cover (13) and a ring plate (14) are respectively fixed to the top of the platform (11), and the ring plate (14) is located between the cover (13); A central clamping mechanism (2) is mounted on the supporting mechanism (1), comprising a circular shell (21) that rotates on the platform (11), a turntable (22) being fixed on the circular shell (21), and a guide groove (23) being provided at the bottom thereof, a triggering member (24) being mounted on the circular shell (21) and the box (12), and an air bag (25) being mounted on the upper end thereof, a linking member (26) being mounted on the triggering member (24) and the platform (11), and a clamping member (27) being mounted on the cover (13), and cooperating with the linking member (26); The conveying and grinding mechanism (3) is installed on the supporting mechanism (1) and the circular shell (21), and includes a transmission member (31) installed on the ring plate (14) and the cover body (13); a linkage assembly (32) and an elastic member (33) are respectively installed on the cover body (13); the linkage assembly (32) is arranged on the transmission member (31) and the elastic member (33); a driving member (34) is installed on the elastic member (33), and a grinding wheel (35), a rubber wheel (36) and a control rod (37) are respectively installed on the elastic member (33); A cooling mechanism (4) is mounted on the platform (11), comprising a switching member (41) fixed on the platform (11), and connected to a connecting shell (42), wherein one side of the connecting shell (42) is connected to a bend pipe (43), and one end of the connecting shell (42) is connected to a nozzle (44); and The welding mechanism (5) is fixed on the platform (11).

2. The automatic pipe head welding device according to claim 1, characterized in that: The trigger member (24) comprises a liquid box (24-1) fixed to the inner wall of the box body (12), a piston (24-2) sliding in the liquid box (24-1), a vertical tube (24-3) sliding on the liquid box (24-1), the lower end of which is rotatably connected to the piston (24-2), the upper end of which passes through the round shell (21) and extends to the top and is fixedly connected to a round block (24-5), the air bag (25) is sleeved on the upper end of the vertical tube (24-3), and a support ring is fixed on the bottom of the air bag (25). (24-6), the support ring (24-6) is fixed to the upper end of the circular shell (21), the bottom of the air bag (25) is connected to a vertical cylinder (24-7), the vertical tube (24-3) is connected to a short tube (24-8), and the upper end of the short tube (24-8) is inserted into the vertical cylinder (24-7), the lower end surface of the vertical tube (24-3) is sleeved 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 circular shell (21).

3. The automatic pipe head welding device according to claim 2, 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) is slid on the platform (11), and its lower end is 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 provided on the guide plate (26-3); a guide column (26-5) slides in the guide hole (26-4) and is fixed on the clamping member (27); a guide column (26-6) is fixed on the vertical plate (26-2); a guide plate (26-7) is slid on the vertical plate (26-2) and is fixed on the surface of the elastic member (33); a guide hole (26-8) is provided on the guide plate (26-7), and the guide column (26-6) slides therein.

4. The automatic pipe head welding device according to claim 3, characterized in that: The clamping member (27) comprises a square tube (27-1) sliding on the cover body (13); a square plate (27-2) slides inside one end of the square tube (27-1); the other end is fixedly connected to a guide column (26-5); an arc-shaped 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-shaped plate (27-3); a arc-shaped plate (27-5) is provided on one side of the rubber pad (27-4); and a ball (27-6) is embedded on one side of the arc-shaped plate (27-5).

5. The automatic pipe head welding device according to claim 4, characterized in that: The transmission member (31) includes a moving plate (31-1) sliding on the cover body (13) and the ring plate (14); a moving column (31-2) is fixed on the moving plate (31-1); a rotating ring (31-3) is rotated on the platform (11) and sleeved on the outer surface of the round 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 moving column (31-2) slides in the guide frame; the upper end of one of the two moving columns (31-2) slides in the guide groove (23), and the upper end of the other does not slide in the guide groove.

6. The automatic pipe head welding device according to claim 5, characterized in that: The linkage assembly (32) includes a transmission module (32-1) and a flip module (32-2). The transmission module (32-1) and the flip module (32-2) are both installed in the cover (13) and cooperate with each other. The transmission module (32-1) is arranged on the movable plate (31-1) and includes a cross bar (32-11) fixedly connected to the inner wall of the cover (13). A movable plate (32-12) is rotatably provided on the cross bar (32-11). A through hole 1 (32-13) and a through hole 2 (32-14) are respectively provided at both ends of the movable plate (32-12). A cylinder 1 (32-15) is fixed on the movable plate (31-1) and slides in the through hole 1 (32-13). A cylinder 2 (32-16) is fixed on the flip module (32-2) and slides in the through hole 2 (32-14).

7. The automatic pipe head welding device according to claim 6, characterized in that: The flip module (32-2) is mounted on the elastic member (33), and comprises a guide rod (32-21) fixed to the inner wall of the cover body (13); a sliding sleeve (32-22) is sleeved on the guide rod (32-21), and a second cylinder (32-16) is fixed to one side thereof; a short column (32-23) is fixed to the top of the sliding sleeve (32-22); a rotating drum (32-24) is rotatably mounted on one side of the cover body (13), and is sleeved on the surface of the elastic member (33); a driving groove (32-25) is provided on the outer surface of the rotating drum (32-24), and the upper end of the short column (32-23) slides in the driving groove; a limiting strip (32-26) is fixed to the inner wall of the rotating drum (32-24).

8. The automatic pipe head welding device according to claim 7, characterized in that: The elastic member (33) includes a long column (33-1) that slides in the rotating drum (32-24) and is fixed on the second guide plate (26-7). A block (33-2) slides in 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), and the other end is fixed to the driving member (34). A limiting groove (33-4) is provided on the long column (33-1), and a limiting bar (32-26) slides in the limiting groove. A second spring (33-5) is fixed between the surface of the block (33-2) and the inner wall of the long column (33-1).

9. The automatic pipe head welding device according to claim 8, characterized in that: The driving member (34) comprises 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 rotated on the U-shaped plate (34-1), and one end of the rotating tube (34-3) is 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), and the rotating tube (34-3) is fixed to the output shaft of the motor (34-2). 3) and the rubber wheel (36) are connected with a connecting pipe (34-4); a connecting pipe (34-5) is fixed on the U-shaped plate (34-1); one end of the connecting pipe is rotatably connected to the rotating pipe (34-3); the other end of the connecting pipe is connected to a hose (34-6); the lower end of the 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.

10. The automatic pipe head welding device according to claim 1, characterized in that: The switching member (41) includes a valve housing (41-1) fixed on the platform (11) and connected to the connecting housing (42). A valve block (41-3) slides in the valve housing (41-1). The valve block (41-3) is respectively provided with a circular hole 1 (41-4) and a circular hole 2 (41-5). The valve housing (41-1) is respectively provided with a circular hole 3 (41-6) and a circular hole 4 (41-7). The circular hole 1 (41-1) is provided with a circular hole 2 (41-3). 1-4) cooperates with circular hole three (41-6), circular hole two (41-5) cooperates with circular hole four (41-7), a positioning groove (41-8) is provided in the valve housing (41-1), a positioning block (41-9) is fixed on the valve block (41-3), and the positioning block slides in the positioning groove (41-8), and a spring three (41-2) is fixed between the surface of the positioning block (41-9) and the inner wall of the positioning groove (41-8).

Images