A tube welding apparatus and method of use thereof

Abstract

The present application relates to the technical fields of shipbuilding, in particular to a pipe welding device and a using method thereof. The pipe welding device comprises a frame body, a first chuck for clamping a first pipe and a second chuck for clamping a second pipe are rotatably connected to the frame body, a sealing cover is arranged in the interval between the first chuck and the second chuck, the to-be-welded end of the first pipe and the to-be-welded end of the second pipe are respectively sealingly inserted into the first port and the second port of the sealing cover, the frame body is provided with a connecting piece which is movable along the radial direction of the first chuck, a welding gun and a stop piece are arranged on the connecting piece, after the welding gun and the stop piece are inserted into the opening of the sealing cover by moving the connecting piece, the driving mechanism drives the first chuck and the second chuck to rotate so as to drive the first pipe and the second pipe to synchronously rotate, the butt joint of the first pipe and the second pipe is welded, and the stop piece stops the rotation of the sealing cover. When the pipe welding device is used to weld the pipes, it is not necessary to paste the tin foil paper on the outside of the butt joint.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shipbuilding, in particular to a pipe body welding device and a using method thereof. BACKGROUND

[0002] Shipbuilding needs to use a large number of steel pipes, especially stainless steel pipes, which need to be prefabricated and welded. The thermal conductivity of stainless steel pipe is low, and the heat is slow to dissipate. The welded joint is easy to be oxidized, so inert gas needs to be introduced into the pipe to be welded during welding. Since the circumference of the butt joint is long and the width of the butt joint is large, in order to prevent inert gas from flowing out from the non-welding part of the butt joint, tin foil paper needs to be pasted at the butt joint. The tin foil paper is torn during welding, which is not convenient to operate, resulting in low welding efficiency of the stainless steel pipe. SUMMARY

[0003] The technical problem to be solved by the present application is that tin foil paper needs to be pasted at the butt joint during the welding process of the stainless steel pipe, and the tin foil paper is torn during welding, resulting in low welding efficiency of the stainless steel pipe.

[0004] In order to solve the above technical problems, the purpose of the present application is to provide a pipe body welding device for butt welding a first pipe body and a second pipe body, the pipe body welding device comprising:

[0005] A frame body, a first chuck for clamping the first pipe body and a second chuck for clamping the second pipe body are rotatably connected to the frame body, and the first chuck and the second chuck are arranged in opposite intervals;

[0006] A sealing cover is arranged in the interval between the first chuck and the second chuck, two ends of the sealing cover are respectively provided with a first port and a second port, a to-be-welded end of the first pipe body is sealingly inserted into the first port, and a to-be-welded end of the second pipe body is sealingly inserted into the second port;

[0007] A welding gun, the frame body is provided with a connecting piece movable along the radial direction of the first chuck, the welding gun is arranged on the connecting piece, and the side wall of the sealing cover is provided with an opening, the connecting piece is moved to insert the welding gun into the opening or move the welding gun out of the opening;

[0008] A driving mechanism for driving the first chuck and the second chuck to rotate;

[0009] A stop piece fixed on the connecting piece and arranged in an interval with the welding gun, when the welding gun is inserted into the opening, the stop piece abuts against the inner wall of the opening to stop the sealing cover.

[0010] Preferably, the sealing cover comprises a hard annular part, and a first sealing ring and a second sealing ring are arranged at opposite ends of the inner side of the hard annular part.

[0011] The inner hole of the first sealing ring forms the first port, the inner hole of the second sealing ring forms the second port, and the opening is arranged at the circumferential side of the hard annular part.

[0012] Preferably, the hard annular part is made of transparent material.

[0013] Preferably, the driving mechanism comprises a driving shaft, a first gear ring fixedly sleeved on the outer side of the first chuck, and a second gear ring fixedly sleeved on the outer side of the second chuck.

[0014] The driving shaft is rotationally connected to the frame body, and a first gear and a second gear are fixed on the driving shaft and engaged with the first gear ring and the second gear ring respectively.

[0015] Preferably, a first motor is fixed on the frame body for driving the rotation of the driving shaft.

[0016] Preferably, the frame body comprises a support body and a first support ring, a second support ring, a third support ring and a fourth support ring fixed on the support body.

[0017] The first gear ring is arranged at the middle of the outer side of the first chuck, and the two ends of the first chuck are rotationally penetrated in the first support ring and the second support ring respectively.

[0018] The second gear ring is arranged at the middle of the outer side of the second chuck, and the two ends of the second chuck are rotationally penetrated in the third support ring and the fourth support ring respectively.

[0019] Preferably, a first connecting part is fixed on the outer side of the first support ring, a second connecting part is fixed on the outer side of the second support ring, the first connecting part and the second connecting part are detachably connected, and one of the first connecting part and the second connecting part is fixed on the frame body.

[0020] A third connecting part is fixed on the outer side of the third support ring, a fourth connecting part is fixed on the outer side of the fourth support ring, the third connecting part and the fourth connecting part are detachably connected, and one of the third connecting part and the fourth connecting part is fixed on the frame body.

[0021] Preferably, the connecting member is a guide rail arranged along the radial direction of the first chuck, the guide rail is slidingly and guidingly connected to the frame body, and the welding gun and the stopper are both fixed on one end of the guide rail close to the center of the first chuck.

[0022] As a preferred solution, a second motor is fixed on the frame body, a rack parallel to the guide rail is fixed on the guide rail, and the output shaft of the second motor is connected with a third gear engaged with the rack.

[0023] As a preferred solution, a distance measuring sensor is connected on the guide rail for measuring the distance between the end of the welding gun and the pipe wall of the first pipe body.

[0024] As a preferred solution, two welding guns and two connecting pieces are provided, and the sealing cover is provided with two openings; the two openings, the two connecting pieces and the two welding guns are symmetrically arranged with the center of the first chuck, and the two welding guns are arranged towards the butt joint.

[0025] A method for using the pipe body welding device, comprising the following steps:

[0026] Step S1, inserting the first pipe body into the first chuck;

[0027] Step S2, placing the sealing cover in the interval between the first chuck and the second chuck, and sleeving the first port of the sealing cover outside the first pipe body;

[0028] Step S3, inserting the second pipe body into the second chuck, and adjusting the position of the butt joint between the first pipe body and the second pipe body so that the butt joint is opposite to the welding gun;

[0029] Step S4, adjusting the position of the sealing cover, sleeving the second port of the sealing cover outside the to-be-welded end of the second pipe body, and arranging the opening of the sealing cover opposite to the welding gun;

[0030] Step S5, locking the first chuck and the second chuck;

[0031] Step S6, moving the connecting piece to insert the welding gun and the stopper into the opening of the sealing cover;

[0032] Step S7, driving the first pipe body and the second pipe body to rotate synchronously by the driving mechanism, and turning on the welding gun to weld the butt joint.

[0033] As a preferred solution, in the step S6, the distance between the welding gun and the butt joint is adjusted by driving the third gear to rotate by the second motor.

[0034] As a preferred solution, in the step S6, whether the welding gun is moved to the position is judged according to the measurement value of the distance measuring sensor.

[0035] As a preferred solution, in the step S7, the first pipe body and the second pipe body are uniformly rotated by driving the first gear and the second gear to rotate at a constant speed by the first motor.

[0036] Compared with the prior art, the pipe body welding device has the beneficial effects that:

[0037] The pipe body welding device comprises a frame, a welding gun, a driving mechanism and a stopper. The frame is rotatably connected with a first chuck for clamping a first pipe body and a second chuck for clamping a second pipe body. The first chuck and the second chuck are arranged in opposite intervals. A sealing cover is arranged in the interval between the first chuck and the second chuck. The to-be-welded end of the first pipe body is sealingly inserted into a first port of the sealing cover, and the to-be-welded end of the second pipe body is sealingly inserted into a second port of the sealing cover. Therefore, the butt joint between the first pipe body and the second pipe body is located in the sealing cover, and the inert gas flowing out of the butt joint is concentrated in the sealing cover. The frame is provided with a connecting member movable along the radial direction of the first chuck. The welding gun is arranged on the connecting member. The side wall of the sealing cover is provided with an opening. The connecting member can make the welding gun insert into or move out of the opening. After the welding gun is inserted into the opening, the welding gun enters the sealing cover to perform welding. The inert gas concentrated in the sealing cover can avoid the oxidation of the weld. The driving mechanism drives the first chuck and the second chuck to rotate, so as to drive the first pipe body and the second pipe body to synchronously rotate. During the welding process, the stopper abuts against the inner wall of the opening, so as to stop the sealing cover from rotating and avoid the interference between the sealing cover and the welding gun when the sealing cover rotates. The first pipe body and the second pipe body rotate one round to realize complete welding of the butt joint. Therefore, when the pipe body is welded by using the pipe body welding device, it is not necessary to paste tin foil paper on the outside of the butt joint, and the pipe body welding efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is a first axonometric view of the pipe body welding device of the present application;

[0039] Figure 2 It is a first axonometric view of the pipe body welding device of the present application; Figure 1 It is an enlarged view of a portion C;

[0040] Figure 3 It is a second axonometric view of the pipe body welding device of the present application;

[0041] Figure 4 It is a top view of the pipe body welding device of the present application;

[0042] Figure 5 It is a top view of the pipe body welding device of the present application; Figure 4 It is a sectional view along A-A;

[0043] Figure 6 It is an axonometric view of the sealing cover;

[0044] In the figure, 100, the first pipe body, 200, the second pipe body, 300, the butt joint, 1, the frame body, 11, the first support ring, 111, the first connecting part, 12, the second support ring, 121, the second connecting part, 13, the third support ring, 131, the third connecting part, 14, the fourth support ring, 141, the fourth connecting part, 15, the bracket body, 21, the first chuck, 22, the second chuck, 3, the sealing cover, 31, the first port, 32, the second port, 33, the opening, 34, the hard annular part, 35, the first sealing ring, 36, the second sealing ring, 4, the welding gun, 51, the connecting piece, 52, the stop piece, 53, the second motor, 54, the rack, 55, the third gear, 61, the first gear ring, 62, the second gear ring, 63, the first gear, 64, the second gear, 65, the drive shaft, 66, the first motor, 7, the distance measuring sensor, 81, the first sealing plug, 82, the second sealing plug, 83, the inert gas supply pipe. DETAILED DESCRIPTION

[0045] The specific embodiments of the present application will be further described in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0046] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. It should be understood that the terms "first", "second", and the like are used to describe various information in the present application, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, the "first" information can also be referred to as "second" information, and similarly, the "second" information can also be referred to as "first" information without departing from the scope of the present application.

[0047] The pipe body welding device of the present application is used for butt welding a first pipe body and a second pipe body, as shown in the figure, the preferred embodiment of the pipe body welding device of the present application comprises: Figures 1 to 6 The pipe body welding device of the present application is used for butt welding a first pipe body and a second pipe body, as shown in the figure, the preferred embodiment of the pipe body welding device of the present application comprises:

[0048] The frame body 1 is rotatably connected with the first chuck 21 for clamping the first pipe body 100 and the second chuck 22 for clamping the second pipe body 200, and the first chuck 21 and the second chuck 22 are arranged in opposite intervals;

[0049] The sealing cover 3 is arranged in the interval between the first chuck 21 and the second chuck 22, two ends of the sealing cover 3 are respectively provided with a first port 31 and a second port 32, the to-be-welded end of the first pipe body 100 is sealingly inserted into the first port 31, and the to-be-welded end of the second pipe body 200 is sealingly inserted into the second port 32; therefore, the butt joint 300 between the first pipe body 100 and the second pipe body 200 is located in the sealing cover 3, and the inert gas flowing out from the butt joint 300 is concentrated in the sealing cover 3.

[0050] The welding gun 4 is arranged on the connecting member 51 which is movable along the radial direction of the first chuck 21, and the side wall of the sealing cover 3 is provided with an opening 33; the welding gun 4 can be inserted into or withdrawn from the opening 33 by moving the connecting member 51; after the welding gun 4 is inserted into the opening 33, the welding gun 4 enters the sealing cover 3 to perform welding, and the inert gas concentrated in the sealing cover 3 can avoid the oxidation of the weld.

[0051] The driving mechanism is used to drive the first chuck 21 and the second chuck 22 to rotate; the stop member 52 is fixed on the connecting member 51 and is arranged in a spaced manner with the welding gun 4; when the welding gun 4 is inserted into the opening 33, the stop member 52 abuts against the inner wall of the opening 33 to stop the sealing cover 3.

[0052] Specifically, after the welding gun 4 is inserted into the opening 33, the welding gun 4 enters the sealing cover 3 to perform welding, and the inert gas concentrated in the sealing cover 3 can avoid the oxidation of the weld; the driving mechanism drives the first chuck 21 and the second chuck 22 to rotate, which can drive the first pipe body 100 and the second pipe body 200 to synchronously rotate; during the welding process, the stop member 52 abuts against the inner wall of the opening 33, and the stop member 52 can stop the sealing cover 3 from rotating to avoid the interference between the sealing cover 3 and the welding gun 4 when the sealing cover 3 rotates; the first pipe body 100 and the second pipe body 200 rotate in the first port 31 and the second port 32, and the first pipe body 100 and the second pipe body 200 rotate one round to realize the complete welding of the butt joint 300; therefore, when the pipe body welding device is used to weld the pipe body, it is not necessary to paste the tin foil paper on the outside of the butt joint 300, and the pipe body welding efficiency is improved.

[0053] The sealing cover 3 comprises a hard annular portion 34, the inner sides of two ends of the hard annular portion 34 are fixed with a first sealing ring 35 and a second sealing ring 36 which are arranged in a spaced manner, the inner hole of the first sealing ring 35 forms the first port 31, the inner hole of the second sealing ring 36 forms the second port 32, and the opening 33 is arranged on the circumferential side of the hard annular portion 34. Specifically, the first sealing ring 35 and the second sealing ring 36 are both high-temperature-resistant rubber; by reasonably setting the distance between the first sealing ring 35, the second sealing ring 36 and the butt joint 300, the temperature of the first sealing ring 35 and the second sealing ring 36 can be prevented from being too high, and the service life of the sealing cover 3 is ensured.

[0054] Further, in order to facilitate observation of the welding quality of the welding seam in the sealing cover 3, in the embodiment, the hard annular portion 34 is made of transparent material.

[0055] In the embodiment, the driving mechanism comprises a driving shaft 65, a first gear ring 61 fixedly sleeved outside the first chuck 21, and a second gear ring 62 fixedly sleeved outside the second chuck 22; the driving shaft 65 is rotatably connected to the frame body 1, and the driving shaft 65 is fixed with the first gear 63 engaged with the first gear ring 61 and the second gear 64 engaged with the second gear ring 62.

[0056] Specifically, the first gear ring 61 and the second gear ring 62 have the same specification, the first gear 63 and the second gear 64 have the same specification, and when the driving shaft 65 rotates, the first gear 63 and the second gear 64 can be driven to rotate, thereby driving the first gear ring 61 and the second gear ring 62 to rotate synchronously, and further driving the first pipe body 100 and the second pipe body 200 to rotate synchronously.

[0057] Further, in order to facilitate control of the rotation speed of the first pipe body 100 and the second pipe body 200, the frame body 1 is fixed with a first motor 66 for driving the driving rod to rotate. In other embodiments of the present application, a handle can be installed at the end of the driving rod, and the driving rod can be driven to rotate by manually shaking the handle.

[0058] In order to ensure the compact structure of the pipe welding device, in the embodiment, the frame body 1 comprises a support body 15 and a first support ring 11, a second support ring 12, a third support ring 13, and a fourth support ring 14 fixed to the support body 15; the first gear ring 61 is arranged at the middle part outside the first chuck 21, and the two ends of the first chuck 21 are rotatably arranged in the first support ring 11 and the second support ring 12, respectively; the second gear ring 62 is arranged at the middle part outside the second chuck 22, and the two ends of the second chuck 22 are rotatably arranged in the third support ring 13 and the fourth support ring 14, respectively.

[0059] Specifically, the interval between the first support ring 11 and the second support ring 12 forms a containing space for containing the first gear ring 61, and the interval between the third support ring 13 and the fourth support ring 14 forms a containing space for containing the second gear ring 62, which not only ensures the stability of the connection of the first chuck 21 and the second chuck 22 on the support body 15, but also ensures the compact structure of the pipe welding device; in the embodiment, the first chuck 21 and the second chuck 22 are both multi-jaw chucks with self-centering function, and the jaw extension ends of the multi-jaw chucks are located outside the first support ring 11 and the third support ring 13, thereby avoiding the influence of the first support ring 11 and the second support ring 12 on the extension of the jaws.

[0060] In order to facilitate the assembly of the first chuck 21 and the second chuck 22 during the manufacturing process of the pipe body welding device, and facilitate the maintenance of the first chuck 21 and the second chuck 22, in the embodiment, the outer side of the first supporting ring 11 is fixed with a first connecting part 111, the outer side of the second supporting ring 12 is fixed with a second connecting part 121, the first connecting part 111 and the second connecting part 121 are detachably connected, and one of the first connecting part 111 and the second connecting part 121 is fixed on the frame body 1; the outer side of the third supporting ring 13 is fixed with a third connecting part 131, the outer side of the fourth supporting ring 14 is fixed with a fourth connecting part 141, the third connecting part 131 and the fourth connecting part 141 are detachably connected, and one of the third connecting part 131 and the fourth connecting part 141 is fixed on the frame body 1.

[0061] Specifically, the first connecting part 111 is a lug extending away from the center of the first supporting ring 11, the third connecting part 131 is a lug extending away from the center of the third supporting ring 13, the second connecting part 121 and the fourth connecting part 141 are both L-shaped, the first connecting arm of the second connecting part 121 is fixed with the outer side of the second supporting ring 12, and the second connecting arm of the second connecting part 121 is detachably connected with the first connecting part 111 through a bolt; the connecting mode of the fourth connecting part 141 with the fourth connecting part 141 is similar to this. During assembly, the first supporting ring 11 and the second supporting ring 12 are respectively sleeved on both ends of the first chuck 21, and then the first connecting part 111 and the second connecting part 121 are connected. In the embodiment, two first connecting parts 111 are arranged on both sides of the first supporting ring 11.

[0062] In order to facilitate the adjustment of the distance between the first welding gun 4 and the butt joint 300, in the embodiment, the connecting part 51 is a guide rail arranged along the radial direction of the first chuck 21, the guide rail is slidingly connected on the frame body 1, and the welding gun 4 and the stop part 52 are both fixed on one end of the guide rail close to the center of the first chuck 21.

[0063] Further, a second motor 53 is fixed on the frame body 1, a rack 54 parallel to the guide rail is fixed on the guide rail, and a third gear 55 engaged with the rack 54 is connected to the output shaft of the second motor 53.

[0064] Specifically, by driving the third gear 55 to rotate through the second motor 53, the first rack 54 can be driven to move along the radial direction of the first supporting ring 11, so as to realize the adjustment of the distance between the welding gun 4 and the butt joint 300.

[0065] Further, in order to accurately judge the distance between the welding gun 4 and the butt joint 300, in the embodiment, a distance measuring sensor 7 for measuring the distance between the end of the welding gun 4 and the pipe wall of the first pipe body 100 is connected on the guide rail.

[0066] To improve the welding efficiency and realize symmetrical welding, and avoid the thermal deformation caused by unilateral welding, in the embodiment, the welding torch 4 and the connecting piece 51 are both provided with two, and the sealing cover 3 is provided with two openings 33; the two openings 33, the two connecting pieces 51 and the two welding torches 4 are symmetrically arranged with the center of the first chuck 21, and the two welding torches 4 are both arranged towards the butt joint 300.

[0067] Specifically, the two welding torches 4 can symmetrically weld the butt joint 300, and the first pipe body 100 and the second pipe body 200 rotate synchronously, which can ensure that the moving speed of the butt joint 300 relative to the first welding torch 4 and the second welding torch 4 is the same, thereby ensuring that the welding speed of the first welding torch 4 and the second welding torch 4 is the same, further improving the pipe body welding efficiency and improving the welding quality.

[0068] To avoid the oxidation of the weld joint, it is necessary to introduce inert gas into the pipe cavity of the first pipe body 100 and the second pipe body 200, and in the embodiment, the pipe body welding device comprises a first sealing plug 81 and a second sealing plug 82, the first sealing plug 81 is plugged into the non-welding end of the first pipe body 100, and the second sealing plug 82 is plugged into the non-welding end of the second pipe body 200, and the inert gas supply pipe 83 is sealingly inserted in the first sealing plug 81 and / or the second sealing plug 82.

[0069] An embodiment of a method for using the above-mentioned pipe body welding device, comprising the following steps:

[0070] Step S1, inserting the first pipe body 100 into the first chuck 21;

[0071] Step S2, placing the sealing cover 3 in the interval between the first chuck 21 and the second chuck 22, and sleeving the first port 31 of the sealing cover 3 outside the first pipe body 100;

[0072] Step S3, inserting the second pipe body 200 into the second chuck 22, adjusting the position of the butt joint 300 between the first pipe body 100 and the second pipe body 200, so that the butt joint 300 is opposite to the welding torch 4;

[0073] Step S4, adjusting the position of the sealing cover 3, sleeving the second port 32 of the sealing cover 3 outside the welding end of the second pipe body 200, and arranging the opening 33 of the sealing cover 3 opposite to the welding torch 4;

[0074] Step S5, locking the first chuck 21 and the second chuck 22;

[0075] Step S6, moving the connecting piece 51, and inserting the welding torch 4 and the stop piece 52 into the opening 33 of the sealing cover 3;

[0076] Step S7, driving the first pipe body 100 and the second pipe body 200 to rotate synchronously by the driving mechanism, and opening the welding torch 4 to weld the butt joint 300.

[0077] In step S6, the distance between the welding torch 4 and the butt joint 300 is adjusted by rotating the third gear 55 driven by the second motor 53.

[0078] Further, in step S6, it is determined whether the welding torch 4 is moved to the position according to the measurement value of the distance measuring sensor 7.

[0079] In step S7, the first gear 63 and the second gear 64 are uniformly rotated by the first motor 66, so that the first pipe body 100 and the second pipe body 200 are uniformly rotated.

[0080] In summary, the pipe body welding device comprises a frame 1, a welding torch 4, a driving mechanism and a stop piece 52, the frame 1 is rotationally connected with a first chuck 21 for clamping the first pipe body 100 and a second chuck 22 for clamping the second pipe body 200, the first chuck 21 and the second chuck 22 are arranged at a relative interval, a sealing cover 3 is arranged in the interval between the first chuck 21 and the second chuck 22, the to-be-welded end of the first pipe body 100 is sealingly inserted into a first port 31 of the sealing cover 3, and the to-be-welded end of the second pipe body 200 is sealingly inserted into a second port 32 of the sealing cover 3, so that the butt joint 300 between the first pipe body 100 and the second pipe body 200 is located in the sealing cover 3, and the inert gas flowing out from the butt joint 300 is concentrated in the sealing cover 3, the frame 1 is provided with a connecting piece 51 which is movable along the radial direction of the first chuck 21, the welding torch 4 is arranged on the connecting piece 51, the side wall of the sealing cover 3 is provided with an opening 33, the connecting piece 51 can make the welding torch 4 inserted into or out of the opening 33, after the welding torch 4 is inserted into the opening 33, the welding torch 4 enters the sealing cover 3 to perform welding, the inert gas concentrated in the sealing cover 3 can avoid the oxidation of the weld, the driving mechanism drives the first chuck 21 and the second chuck 22 to rotate, so as to drive the first pipe body 100 and the second pipe body 200 to synchronously rotate, the stop piece 52 abuts against the inner wall of the opening 33 during the welding process, so as to stop the sealing cover 3 from rotating, avoiding the interference between the sealing cover 3 and the welding torch 4 when the sealing cover 3 rotates, and the complete welding of the butt joint 300 can be realized by one rotation of the first pipe body 100 and the second pipe body 200; therefore, when the pipe body is welded by using the pipe body welding device, it is not necessary to paste the tin foil paper on the outside of the butt joint 300, and the pipe body welding efficiency is improved.

[0081] The above description is only the preferred embodiment of the present application, and it should be pointed out that those skilled in the art can make several improvements and replacements without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A tube welding apparatus for butt welding a first tube (100) and a second tube (200), characterized in that, The utility model relates to a welding device for double-tube welding, which comprises the following parts: a frame (1) is rotatably connected with a first chuck (21) for clamping the first tube (100) and a second chuck (22) for clamping the second tube (200), and the first chuck (21) and the second chuck (22) are arranged at a relative interval; a sealing cover (3) is arranged in the interval between the first chuck (21) and the second chuck (22), and both ends of the sealing cover (3) are respectively provided with a first port (31) and a second port (32), the welding end of the first tube (100) is sealingly inserted into the first port (31), and the welding end of the second tube (200) is sealingly inserted into the second port (32); a welding torch (4) is arranged on a connecting piece (51) which is movable along the radial direction of the first chuck (21), and the side wall of the sealing cover (3) is provided with an opening (33), and the connecting piece (51) is moved to insert or remove the welding torch (4) into or out of the opening (33); a driving mechanism is used to drive the first chuck (21) and the second chuck (22) to rotate; a stop piece (52) is fixed on the connecting piece (51) and arranged at a relative interval from the welding torch (4), and when the welding torch (4) is inserted into the opening (33), the stop piece (52) abuts against the inner wall of the opening (33) to stop the sealing cover (3); the sealing cover (3) comprises a hard annular part (34), and the inner side of the hard annular part (34) is fixed with a first sealing ring (35) and a second sealing ring (36) arranged at a relative interval; the inner hole of the first sealing ring (35) forms the first port (31), the inner hole of the second sealing ring (36) forms the second port (32), and the opening (33) is arranged on the circumferential side of the hard annular part (34); the connecting piece (51) is a guide rail arranged along the radial direction of the first chuck (21), the guide rail is slidingly connected to the frame (1), and the welding torch (4) and the stop piece (52) are both fixed on one end of the guide rail close to the center of the first chuck (21); a second motor (53) is fixed on the frame (1), a rack (54) parallel to the guide rail is fixed on the guide rail, and the output shaft of the second motor (53) is connected with a third gear (55) engaged with the rack (54).

2. The tube welding apparatus according to claim 1, characterized by The hard annular part (34) is made of transparent material.

3. The tube welding apparatus of claim 1, wherein The driving mechanism comprises a driving shaft (65), a first gear ring (61) fixed on the outer side of the first chuck (21), and a second gear ring (62) fixed on the outer side of the second chuck (22); the driving shaft (65) is rotatably connected to the frame (1), the first gear ring (61) is engaged with a first gear (63) fixed on the driving shaft (65), and the second gear ring (62) is engaged with a second gear (64) fixed on the driving shaft (65).

4. The tube welding apparatus according to claim 3, wherein The frame body (1) is fixed with a first motor (66) for driving the driving shaft (65) to rotate.

5. The tube welding apparatus according to claim 3, wherein The frame body (1) comprises a support body (15) and first, second, third and fourth support rings (11, 12, 13 and 14) fixed on the support body (15); The first ring gear (61) is arranged at the middle part of the outer side of the first chuck (21), and the two ends of the first chuck (21) are respectively rotatably arranged in the first and second support rings (11 and 12); The second ring gear (62) is arranged at the middle part of the outer side of the second chuck (22), and the two ends of the second chuck (22) are respectively rotatably arranged in the third and fourth support rings (13 and 14).

6. The tube welding apparatus of claim 5, wherein, The outer side of the first support ring (11) is fixed with a first connecting part (111), the outer side of the second support ring (12) is fixed with a second connecting part (121), the first connecting part (111) is detachably connected with the second connecting part (121), and one of the first connecting part (111) and the second connecting part (121) is fixed on the frame body (1); The outer side of the third support ring (13) is fixed with a third connecting part (131), the outer side of the fourth support ring (14) is fixed with a fourth connecting part (141), the third connecting part (131) is detachably connected with the fourth connecting part (141), and one of the third connecting part (131) and the fourth connecting part (141) is fixed on the frame body (1).

7. The tube welding apparatus of claim 1, wherein The guide rail is connected with a distance measuring sensor (7) for measuring the distance between the end of the welding gun (4) and the pipe wall of the first pipe body (100).

8. The tube welding apparatus of claim 1, wherein, The welding gun (4) and the connecting piece (51) are both provided with two, the sealing cover (3) is provided with two openings (33); two openings (33), two connecting pieces (51) and two welding guns (4) are symmetrically arranged with the center of the first chuck (21), and two welding guns (4) are arranged towards the butt joint (300).

9. A method of using the pipe body welding apparatus of claim 1, wherein, The method comprises the following steps: Step S1, inserting the first pipe body (100) into the first chuck (21); Step S2, placing the sealing cover (3) in the interval between the first chuck (21) and the second chuck (22), and sleeving the first port (31) of the sealing cover (3) on the outer side of the first pipe body (100); Step S3, inserting the second pipe body (200) into the second chuck (22), adjusting the position of the butt joint (300) between the first pipe body (100) and the second pipe body (200), so that the butt joint (300) is opposite to the welding gun (4); Step S4, adjusting the position of the sealing cover (3), sleeving the second port (32) of the sealing cover (3) on the outer side of the to-be-welded end of the second pipe body (200), and arranging the opening (33) of the sealing cover (3) opposite to the welding gun (4); Step S5, locking the first chuck (21) and the second chuck (22); Step S6, moving the connecting piece (51) and the stop piece (52) into the opening (33) of the sealing cover (3); Step S7, using the driving mechanism to drive the first pipe body (100) and the second pipe body (200) to rotate synchronously, and opening the welding gun (4) to weld the butt joint (300).

10. The method of using a pipe body welding apparatus of claim 9, wherein, In the step S6, the second motor (53) is used to drive the third gear (55) to rotate, so as to adjust the distance between the welding gun (4) and the butt joint (300).

11. The method of using a pipe body welding apparatus of claim 9, wherein, A distance measuring sensor (7) is connected to the guide rail, which is used to measure the distance between the end of the welding gun (4) and the wall of the first pipe body (100); in the step S6, whether the welding gun (4) is moved to the position is judged according to the measured value of the distance measuring sensor (7).

12. The method of using a tube welding apparatus of claim 9, wherein, The driving mechanism comprises a driving shaft (65), a first gear ring (61) fixedly sleeved outside the first chuck (21), and a second gear ring (62) fixedly sleeved outside the second chuck (22); The driving shaft (65) is rotatably connected to the frame body (1), the first gear (63) engaged with the first gear ring (61) and the second gear (64) engaged with the second gear ring (62) are fixed on the driving shaft (65); the first motor (66) for driving the driving shaft (65) to rotate is fixed on the frame body (1); in the step S7, the first motor (66) is used to drive the first gear (63) and the second gear (64) to rotate at a constant speed, so that the first pipe body (100) and the second pipe body (200) rotate at a constant speed.

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